Document gaodYkyLVjKZr1bV18mvGvyvq

! i'v < - >!/:!> " f i t'i a ?K ' r. ht Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 1 of 145 ED 002061 00172724-00001 Tilg gaifiir illussiSiag is rrprsfoteerf fhsru Fig, i l f $ Biulgiss ' TisBisgs sfisfotg i-gi psa: ffoufeored Carsirai Cfoshorgs MFd (fmm Bisbhiskg, 19?$} VEMT1SSEMHT -- llO M f t T O N I EESBOSSBILfTE ; Les iofotrstatforts,: sstslgses si conclusions isesgaeHes est ouvrag rearle sont sms la estola^ tspensahiht de Iosifs) auteurs) respeetfSs) sitis), t ;,f " ;ii' a-, ,1'ij w-'* a. ,w a' a-fias (,<0 u w uu-r >< , u's><ee m : <! te -to ,0' <>.<. it - C,ea! p-w a i m f " i '.ah~t<0U s\ n\?gli <'U.ss' '!i >-'a d l-'' d; |.-i* V \ !, a 1 s !', s ', a "s: esauUi'f 0 ce. lui.v ^ m. p.rw r C>, .fouwaK'Ove .Lute.', ,,<>wh< if.a>s 1 >M >g*|re>. o' >a a es, ,e wa t e r b , ,, u w t portae. Malgr teer le sollo apport la tstdoetfoo de eat tsevrsge, aosttgle lemt de Iwvotutfofi; 9m teelssigoes et de la sehsaee, noua a gourous m garostsr IfoMhaasrtvIrsi hfous detsoons expressalPnt: toute rsoussansote geastt llstergrtstifofs et Ifoppheedots veatoelles (y eosspts 1m doistsrtoges Pvaowit sa rasulhstsf oo Iles} du eotslsfio c et oovrugo. Es pouwalvtsi la Iseatre do ot, osvtags, root ttoseptea de isori aspresse Peste coisbldorr, IdftCE - D ISCLM Ei t The ioionrtsstou,. aasigstes ffiiil aoactosloos ferne! tu herels ara die solo resptmtbtfitg olise oufoodls) foereeh Tfio atbnttdoa, afialyses sod ooelulosts le this docussesl hase a legal foies sied fitest fitst ho eofisklst'ed es setssitothtg for tegellywoforeatfoie iftelai regatatfoas. Ths are latesded for the osa of esperieaead prfossiestuls wits are afotts equipped to Judge their pettveaope and apptkpbihty. This dpeuaasitr Isas boos rfodlsd with foe greatest care hat, la view of the pare of ehaoge lis salease aad teahaefogy, toe saraso!: glissantes that it covers all aspects of the topfe discussed. We deeltee ad responsibility whatsoever tor how the Infbraiaitofi horefo Is interpreted trod used astd will aeeept fit) itsbllily for say loss or riataage arising: tberefto, Do tsot read op unless you accept this disclaimer without reservation. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 2 of 145 ED 002061 00172724-00002 RISK OF DANGEROUS OCCURRENCES Lessona learntfrom practical experiences P W H*!' !; <i <.<!,! <xB.sfra ^ T S i !>-'* -3 ? " is :Z ~ , t x h-ri as a"*'s^Sa-fii !> :hss<S, as .-''.a sai l-l Sa 1-3,.^; 6( - Pi,a ' s T< s: Paris -an Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 3 of 145 ED 002061 00172724-00003 ICGLO C O M M IT T E E ON T A iU N G S DAM S A N D W A STE LAG O O N S (1S9S-20C1) Uetee Arm Bern GceMAarmae Soetr, Africa A%,miwr AesbeiL S fs ri Bulgaria Canaria Cr-ile China France Germany is!y Iran Pe'end K`'<rrw.G Russ Semden U S A ChfffiBfi l j a PCAMAN J.R 61 Wl.LiA.MSQN J PHLLiPS J H M E N l A l > AVILA C. 3. ABADJIEV P J Ki OHN {1} H. POLE GO i'J) 1L fA X 'U ^R A ?h|-,e I iu J M ,DUPAS J ERALOG G PANE L I M 1 AAKAR ,V W tK VL GRO/PA Aaenlu U X a 4) A M, GALPERIN 8 FURCHitS S.G, v C K jE i GA 6TR A G IAK 1} BR ITISH S U B -C O M M iT ^E E A.D.M PrNMAN D, BROOK S.A. CAt.E i-M , MARTIN O. RCUTH O'; Member until 1998 u1.} Member sbem IBB O j M er X i s.O I MO M 'M i- r b m M v - K-IOB |5) Nsmfef anff 1896 (.0) Member sine# 1996 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 4 of 145 ED 002061 00172724-00004 S IM Y ARY Rf EU MIL, FOREWORD,..,,...,.,,. .......6 s x <>><<>> x > 4 <:>> x .>x ' ' v - A ' ' v ' A - v ' ' - v v v ' - ' ' - ' ' ' ' v *" " ' ....10 PREFACE, .... ,... 11 1, INTRODUCTION!. 13 1,1 QbjecfN&s.................................... ...................................... .............................. 13 1 2 Background .13 2, PREREQUISITES FOR SAFE TAILINGS DANIS,, ................... ......... ..... ...... ........ IS 3, OVERVIEW OF DAN AND TAILINGS OAM IN C D EYTS,,,,,,....................... 19 4, COMMON REASONS FOR FAULTY BEHAV:OUR__ ____........... 23 5, RISK MANAGE G E N T , . ,, ,, , 28 5.1 Risk assessment,,,, ,,26 5.2 Riskmanagement.,...,....,,.-...,..,,....,.----- ......---- --------------- ---- -------------- ........ 27 8.3 Risk aaogngeney p l a n ... >... ................................... ............. . 28 8, LESSONS LEARNT FROM THIS STUDY.,......,..,.............................................................30 8,1 General assessment o f IS# lessees I ..^V, >. >!-:->>-<-> ,w. 30 3.2 doe-. t s u.*urk*raik*f with examples of incident______ ____ ____32 C1.1 FLosoerthnendInvestigation.................. ............. .... ........ ..........32. 8 ? 2 SRdnr dam ....... ....................................35 ** x s UwaSsiactorv f o u n d a t i o n s . , . ... _________________________... 36 8 xY i a- k - 1staoNty of thadownstream slope..............................__........... 33 3 2 6 Su,.f,nrpau loads.,.,,,... .................... 44 0 2 8 -' reoie c web decants,,,-- ----- ------ ------- ------ ------------____ ___ ,,,,-44 8.2.7 Flow slides ... ........ .................. ............ ....................................43 6.2.8 Earthquakes,,......,.,,...,.,.,,...,,.,,,...,,...,.,.,...,,,..,.,..,...,..,.,,...,...,,,,.,...,,,..^? 5.2.9 loo and faulty water balance __ _ 48 8,2,18 Impoundment not retained by a dam 80 6.3 SAFETY M A N A G E M E N T , , . . . 82 ?, CONCLUSIONS AND RECOMMENDATIONS .... 53 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 5 of 145 ED 002061 00172724-00005 > LESSONS LEARNED : IMPLICATIONS FOR POLICY - A UNEP VIEW,... ......S3 9. .. ...................... .. ................. .............. ....................................... ,,,.8 0 10, FIGURES ,,,..,,,,.,,,,,,,,.,,,6 ? APPENDIX - TAILINGS DAMS INCIDENT CASE RECORDS ,,,... ................... ,....83 2~A b b r e v i a t i o n s , , , ,, ,, ,, ,, ,, ...,,,,,,,.,,, ,,,, ,, ,,,, ,, 8 4 3 - Lsi. of 'oPogs dams "or wh,ch incfcent s e s m m collected--------------------------- ,84 4 - Sri? eie&cfto&ns of 221 cases ,,,,98 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 6 of 145 ED 002061 00172724-00006 Bg, 1 Wafer storage dam insidsnt comparison. Rg. 2 Tailings dam insiders! history summary: number of incidents par S year period. Fig. 3 Tellings dam incident and heigh! comparison. Fig, 4 Taiiings dam failure and height comparison, Fig s Extm riyim on a closed fallings impoundment Fig, 6 Talliage dam type comparison, Fig. ? Tatings darn tooidad e a u comparison w t der. srahw Fig, 8 Tailings dam incident sause comparison wish incident: type for actios dams. Fig, 9 Tailings dam Incident cause comparison with dam typo, fig . :0 "actors influencing the position d the ohreatio surface in earns built by too upstream method Shows effect d rack of drainage and layers of sow aermeabliny producing pemned water surfaces, fAfter fe-i o ld , "992}, Fig, 11 H ydocyciona. Fig:, 12 Section of starter dam formed fey art: add in g dump. Fig. IS Section o f Aaodcdlar tailings dam. Fig. 1- Upseeam method of oonsuodme with spigots.. Fig, IS "msmgc low s at f y Mae# r d w 'v , South Wales, in 1881 end 1965, Fig, 16 -allere o ' the decant pipe a: Stava. Fig. 1" Sfn?s,s~^,me ,* en 'c" dross ooptrotted esnsofdaied ur-drainud ta d so uam-itud lia we sm o Fig, 18 " d i egs porsge as eg too "m em ood Central Dischm, e V.-J o>,, (Roe' nom tmm RnblnsM, 19WF Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 7 of 145 ED 002061 00172724-00007 "m> u'j- dumu Ui sii tu re ta n smoussm-asutee o; fa ll q-, stesi wNen o Who;, waieuaf mstteutesj su" lifts ts lifs ^ V susteulvae Sii u-iwf s' (hok a teteu; I un They '<> <, mors* toususue ss uaosnsuri siN e-nua- tersse danis iw 'i to rafa ss a im s o te n o s, ate s many ; , w . om b -J f o * a la r ml.fsrtir.fi -iots, pitfsRulasiy atoare ` hura so a m e d re ent fr.r lue sviin g e c/ w ater over tua bsisrsgto r r n a atorad w l g - b a r ta be psotw iao t a edam ns o f a ta r to ruvurn ac ai ooite-iost WH.lc l fv motmrte istc-'d Vr ths design ad construction c f embantesiesi danta car ifa atteste. ,u Sassrpo fian a, ibera aso mgfor effomstesis twaor '.Na teto typte. I rrba.nknwn'. n-smn uso prualsaus slrudurua usad :n profitably sforo water, wbsrous h.if.ngs nansa .t u a-quimr! ter Ida aiomcto I ornsa-tead waste dssirsfc'y al mteimurr* cos C m rsdtrrate d?ms am uttosWy r-uH io teli balgte during one carted of cosastea i i a \ roving tuen rtosugeed and tdsir construction supervised by ccropetem urs-gi'oerc ie-oulu'iud by lav-/ n many aduninosi. Modem tarings earn* are oft d?><r><*i t v a-stspetel tesioiispg engineers. bul because they am fcdSt s'Owiy ir Steg' -A V many '/crus and conditions may also charge w rit lima, supervision of SSiwr .'-.stelo assors may become faulty, tes suns-nur ss;r IN rmmgrs " ,n!m I on -, -dimaf of ante Iasi rsgv cam s have usen g-ven by " m ry g dsmul-m m eludtto ,Ui f- hulhun* test? 4S (Id ':? }, 7a fUddib dr (1594'. 3b ' n)ub It*' te liO iZ 105 0595;-, i0 4 |> 5 9 e ' Hk> ( 993), AfuCG.O I ftWOt If vhe rcco m m e m la to iis g v<r su I muc gu-U oirv w w to Isa oleum v faPavstod the W m a lassj ft- lysiywews <<Cte -<>- w ib lassssga ra m and rs tx usbiftiHut -teui Ne g v a ly teduaeu < sifcsd.jijteiy son r u te v - f ar -a as s- osato- -fr .'sssPsusste s a'mrage o f us-e (Ness -, u , vans Ouss-'u tlsu ass rs yeuss r sj rase Nas hems 'w e py- '/-as With Ib intenten o trying in dem-rmrso sh? rauaes r>! "tese incidents 33s case a v o rd i -dvo bstow eofacted They ara iven both so bre^ detail ;3rsd d-Ssyeaead n q "natal tetrua Tdb mars cau.es c f dsaco mpertod casos o f foslsjre ans) nobontt were ssmd io co hek of oor.poi of the a,-osar bsinnee, vick of ixrb'O of conetmction end a gossural laua ;.st uHi1ere<t.rssj:Sssy of (No fmurs thal conlnol ease iiperalsons Trsem were ~e <r tee 'aso? of unpmdiC'aoi eversi? ost;i usNas m m s caused by msu^paoted dmatsc ennditinns, -nctud-ng o a i i o q n a l l b r s u g h r soa bn argued -Nal with today's krsow'ecge. aiscwanee scoters tgve ye-en oiaee for ite se oversfs. W ate" tolrrm cg damo su -siate ^om cney dte costeoi c J t v legsb'iors ass-,- s' s e r e cuartees ihc feais.sfkn npyssio m e rn svrk-r-te 'amo -'efass>my wtem , r i isy.say appsted Ist alfs.'nu dassis flm m ft'.penfs tr> is;- a masme- 'e ti' irss a -*s;,sse <.{, tsyve appdtat'on ns" tops's a.sa>n fo !Nfe ooss-svenue vaasrsy -rtsessy >f nts;' nu waalo S-<S!ov e, rs arder tn fotomo ten lorisTun ' s 9 ta te n a a.tm lass ,ra ail ursso-sfsteirfury Na'"-av(isit Updo-dofe Intesmo'jn n con na otearted fmos o '7 brear log v >of a e je r 'a llo g a caos falures" c c p fe J by W lS Usa">ivn Prosees, teat e a r fie !o ,,n c on tea .-Obste .tetera;;.,e,svsyeJofoboymsiS< m im M r^ h Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 8 of 145 ED 002061 00172724-00008 RS' JMB te s barrages de strras soni construiis pouf le tooKgs do s u ite s et. dans 's resure se possible, dos matriaux extraits des striles eux-mmes sont utiliss puer te ppeslrpcien Ces ouvrages est beaucoup d'aspects eernparab'es ceux des barrages en remdia! classiques crant des retenues d'eau, et dans tiers des cas ils son! &ontrJts dp a rvms faon, oa'iculirarfi&nt orsqull est exig PP 'gtenir :'esu au-dessus des sleriiea ou oraoue Ses dnias ns en dpt ncessitent une piotucdc-n par une nappe d'eau afm d'v.tor une poiut.on par m m arienne. %<m pue les mthodes de cooeeplen et e construction des terrages en remblai classiques puissent s'apetiguer aux bagages t e striles, ces aux types d ouvrage prsentent d'imaortantes difirfKs. Les barrages en remblai sont te s ouvrages prastgieux steekaD feeu sans uii but utiiitaje, alors qra? Iss bairages de striles sont nr-seeesres po ur le mise en dpt des rejets et ce eu moindre sol. Les barrages ers remdial sent ha&iiusiiermen: construits en uns sauie tape, leur conoepiion et leur constaiction tant superaises oar des i-genssyrs oorr patents taxe appkcsbon rte prescriptions igaias dans bsauesup de pays). Las barrages de s t le s niodemes sont sauvent conus par das ouraaux d'tudes comptents mass, du 391 de leur construction lent par tapes s'tendant sur de nombreuses anne, et du changement pcssib a ce conditions dans ta terras. t contrle de teur construction peut devenir dfectueux. Des recommandgions rotatives la conception, (a censtruobon et a la fermeture das barrages da striles ont i prsentes dans p es:eurs publications : en peut ester notamment as Buiabos de :e CK3B r-8 46 D d t 74 f1989g 9? D8941, 98 D99SL *01 D39S, 103 ( 1990). 104 1930;, 103 '1939), et ANCOLD s" 'DLL Si tes rscammandolens donnes bans ces documents taient suiv es de p-s. tes asques de rupture ou d incident grave eencurrart tes barrages u! dpts da stnles seraient beaucoup 'dults, Malheursusemeot, le nombre d'mciden naieurs continue dpasse'' en rrjoyeme un taux du un par en. Au coure des sas dernires annes, ce taux a t de deux par an. En vue da dterminer tes causes da ces incidents, 321 cas de ruptures D d'inoqents ont t rpedones, tic sent deents onvement et aooiyss en termes gnraux, tin a dduit c,ua las principales causes das ruptures a;. Licidsms rpertoris ont t : vu manque de mansu du bilan bye radique, un mauvais conite du te oons-ruconn et un dfaut gnral rte comprhension des principes dora dpend la scurit des oprations. On a racense i<n nu deux cas c vnements imprvisibles al d'autres cas dus e des condition aiaiatiques exceptionnelles et des sexemes, n k g * D grande attarder porte da tels vnements grce aux ccnneissances ectites. Luira la plupart des pays, ies barrages stoc-rant de t'eau son? suurn;s uns nqssb tvn , et dans certains pays a legis'aiKsn relative aux barrages en romb<a: sappbgue gaieront aux borages de striles. En vue ds redeve :es risques ds rapture ou de mau vais compqrtsment des barrages da st-'les, !i apparat ncessaire Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 9 of 145 ED 002061 00172724-00009 The COLD Tarings Dams Commas has concluded tost effective reontoior, of the ccs* cf risk a?to failure can only be achieved by a commitment from O w ncs to the adequate a^d enforced apalication o f availab-e anginaemg technology to the design ccnsU action and closure o f tellings dams and irnpounUmsnis ever the ent.ru penod of their operating life. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 10 of 145 ED 002061 00172724-00010 0`teodre i'aopiicetspn cia te gi&leffn aux activits non neetefoos de stockage dee otertes. Des h lo m stom mises jour peuvent tre obtenues an eomJtar-i so document * C bn ro iog y r major tsrfings dam farfoms >- tote! par WiSS UdnL;m Proisct 1 disponici sur !& si?e vveb Le Comit les Barrages et Dpts de Sld'es de fa CfGS a ccociu ou'un sjyetrftis efteetr/s des cote do nsquo et do rupture na pasva t tre obtenu s-fuo psr on engagement des mobres d'ouv-ags et uns stricte a r na tion des iomodogins. dipanibis 3 te conception, la cens>.nict!,`- et te fermeture dos barrages et cpnls eo ddies pondant torde Sew dure P'exploitet-or. Sierra Club v. EPA 18cv3472 NDCA t# Tier 10 Attachment E Page 11 of 145 ED 002061 00172724-00011 FOREWORD 1ns rtsposs. of wastss in our mterrrcwvdftd worid has acorn a serious proslnm. fiver domestic wraetos in the davempod ooueeies presents a difficult disposal ptob'am Dun io is nafur of mrring end mteerei pmcassieg, ha volumes of m-feng wastes am significantly larger then those of both domestic and industrial wastes. The chemical characteristics of the wests (particular^ moiAiy of msfai constituents! are offer of concern, Tne volumes of mine waste realty exceed fee total volumes ai matenas hendted Py avii eucineeang throughout Ida wood. The crushed cocK passed through the prooessirsc plant to extract the desired prtjdocf is discharged from the tail end of toe plant as ios 'sale tali-ngs. a-'d m many parts of the word fomis the greatest volume of mins waste, although at open-pi? mining operations the volume of waste sock may exceed the voiume of tarings Tna fine particulate tailings are commonly stored in impoundments teamed by tailings earns. The malarial is graced hydraulically and so is louse m e nearly saturated. Any major movemenf of the retorting boundaries of the impoundment, can >ndocp nearing strains that dishorn tec stmefura of the tattings .mass, educing g rapid rise of pure water pressures and liquefaction of a sector of tiro impoundment, causing even greater pressures to he applied to the sstarting aoundaoas. Failure of the retaining dam pan release iiei,te%n tailings that can travel for ossa; r.istances, and because e?its greater weight destroying svsrythng in its path. Water >m k m through and around hustdmgs bet ligusfoxi ta>ilogs car, destroy the structures. The tendency is fer felling corns to baenms aver higher and rt-rooundmente ever iarga' Similarities between tailings dams ana omhnrwmnnf dams designed to .'stain wateq have enabled many ert the design techniqi os usee with embanXmem dams to oe appfed to produce safe tailings dams, but aosulto great rmprovamerns, there has been a reported failure o f a ladings cam aimust aver'/ year for tire past, three decades. The damage caused by these failures in the feme of human casualties, pesiruckon ? proper.'/ disruption of rtm m jn ica tio ra . pollution of the envrmnmsnt and sconom.c sees to the m'nsng rndi retry is enormous. The purpose of this Bulletin :,s to discuss same of these failures and see whet ossons can be learnt *om them, so foentrfy improvements that would reduce the occurrence of these fai'ures. The Beiislin wes prepared by the British Suh-Commteee co Tellings Dams. using with permission anc agreement, the USCOLD eoffedron pf " B6 case records puolished in 1994, the 26 cases found by Mining Research Services for UfegP published in *996, and 12 examples knowr tsy memtiers of the iCOLD Cornm.ttoe. Dunne final compilation of the base records, some duphm?ions were found, so font the fatal number neesrns 221. Ail members of ihd ICQLD Committee confr bided to the final draft and libnrte use has been made of their publications, e,g, Askan a? si (1994) Penman et ai (2000}. Siracban fi9 9 9 ) and Williamson (1899), Specie1 mgrrion "ms* be made Pf for Kulooza who categorised the 2fei cases give in the Appendix, ""he Bulletin has been reviewed both by the ICOLD Committee on failings Dams and Waste Lagoons s-md by UNEP Valuable comments base else been recuivad from the National Committees of ICOLD and we aro ymtefoi to everyone myo'vut; A D ?2 Penman Chairman, ICOLD Commritoo on Tailings Dams ao,, Waste Lagoons Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 12 of 145 ED 002061 00172724-00012 PREFACE D 'A ^ io m a (19761 sals. 'Hoy attempt si construction of a tailings embankment that does not fake into account tne desigmoonteruct process, is in my ooinfon doomed to groat distress" Ho pointed out that construction goes on for very many years, during which lime many conditions may change, so it s assented to maintain a ftejsible approach arid amend the des>gn as requfmd. Ruv NNteaoi yVest { itete) sasd, "if my own view `hat many m ne oewderns and perhaps anpa na-iy foe >-nst sano-s odsc from over-fari! drify -vith a ootetefo hazard. Soma of the worst setfoeote wmch rune hrxm assocatec with mud rusher; and tarings i w w j B w t e m tempts exompios - fonfuirs, wtava. Harmony P'erre Loi!So, T i. b u m f af iCCI ~ In a I w t iv gW>v at ASF in 1980 scout bacons irons oaiffi Jam fosnnm sad that ms sums t sttb ft urn suucsss teh s tot from ms mist-sites Sod >ntg tore nm mmm s- vital h r sm^m^ng our vnowlodge and promoting n s ic r . os on *fe ,,,0a <scm K*y<rimfr<dvf o~f< ap >R-ahte to t&fings dams. These ware: <1) dot for ovon-ourisuiidatod clay formations, and usa residual strength onmmeters, {2| Look out for feose saturated sandy formations and study ftiair iiquefattfeh potential; m Analyse the floods -a terms of probability of t r r Tcrrm and corresponding pmhasilitv of damage cocvnsiream: UH Use tha moss recent hydrological methods. (S; Rrofoda ampis and well graded filters and drains for preventing piping;: (8) Teal for ispersb potent! of tins clayey soils: (?) incorporate instrumentation as a vital pan .rt the design o f a darn far .monitoring its safety; (S) Prov.de a thoroug*5and carafe! surveillance af dares and appurtenant structures on a continuing oasis. fSube foes far tne safe design and co'-structlert of tailings dam* and waste lagoons have keen published in the fo'lowho 1COLD Bulletins: a) Ho,4S, b) Wo,44a> a) Ho.74, ci) Wo.87, 8} Wo,88, Ci Ko,"g , g) No,183, h) No, 184, 0 No, 106, Manual on ''alfogs Cams and Dumps, BtfeSiogreplw. Tailings Darn. Safety, rs in e s Dams - Design of Drainage. Taiifogs Darns and Soismic.iy, Takings Dorrs, Transport Placement end Decantation, Tai'snoe Dams and the Environment. k'o ' itohng of Ta-ifegs Cams A Guate to 1stings Dams and impoundments. 1382 1883 1883 1894 1898 1898 1998 1898 1898 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 13 of 145 ED 002061 00172724-00013 Knowledge about she factors that cortm i the behaviour c f tailings dams has improved creal'y during the {last 20 years, aiso the consequences and pual.s pareepf.on of failings dans larmes bus increased considerably. causing managers and owners to become more aware of the date involved -n the construction of impoundments. Many factors influence the behaviour of tasfngs impoundments; accidents and other incidents aro often the reoit of inadequate site investigation: design construction operation, or monitoring of foe impoundment or a combination of these. tve-'y ecu and dam is unique so direct applicahou from one 'g acotisor is seiden, possinie. -iowsver, ;hore ere a number of common psindides anc She .w in s -ea'-'aC from incidents ai on darn can be anpiied :n genes ai farms to alher situations. lh -s Bulletin s intenced to g ve g tra ra i advice that can be of help to ail these responsible V H pouoc rants one tailings dams. Sierra Club v. EPA 18cv3472 NDCA r? Tier 10 Attachment E Page 14 of 145 ED 002061 00172724-00014 1,1 OBJECTIVES Ih ,w . ~'t ton V ffnan to hia'to rh ' nn toom !m "! s^rro nt tdr. rilttoufiins (tosr-nscnD snccsjntorsc to naip mcnum, menage's, custoaetoss ad ,,-ixn pam o'sel msrom.bte to; toe ?toy to Jay eunsd action o'" tosfsssgs der-w, to ovmJ in la? c illv e I as l; a rtonca-e to as ?*f to`p to (sf thane ecrsicatod s ar v way with leunga c<srfls and h.' legnos-y, giunnisnsm ~1fs.'tos ;w v m ;-d wst* a j i s i : an?, hm sing I f tais eosscemed n tv u t toe to*.ruinants nr.s^sd so; plan tig pmm'ssbn, ;np fhosu eorvemed aha 3 I isonto J rg s h ist oi nvtoifs t tml-egs dot v E^m ptos ara > to s ? aceide'to and leiiums tscgemes web same me " p i n of u'fectk'e macsel msecs a;. 12 BACKGROUND ir 1384 COLD approved a proposal for a `Study of kmmrt failures and hnidenfs arising from ,vcck foundations tor dams'. rhsa title was modified during 1S6S-6 to Failures anc aecibsnts to large dams' The (COLO Commit-sae on Faiiures and Acdcants to ..atsa Dams expanded its report to induce o-wonts -occurring during ccmsimction and major repairs *M the 19?3 Executive svieefng d USCOLD, toe Ctommittee was authorised to procesd with a repost covering inQoersIs to USA dams during the penod 1990 to 1972. P'-a r'wxto spsdPva!1'y excluded mme taf/togs ana mfusa dams. Questionnaires warn sent to a large number at dam owners in 19d8 a rd 1971, respiting in toomrintton on 349 significant indcarsfs. Tbase were catsingued under 8 haedmgsr to Meier failure of a dam doting c p o m tkr, rmsiting In eompteto sberdonmsnt. F2 Major %dsjre ot a darn rtorinsu opsmbcm that s3s.rs.ifd be repaii'ed, A1 Acodant ; dam tea? hats hem operating frr some time, that was rectified before taiiura occurred,, A2 Accident during India! filling, ,*13 Accident before filing b og s', AR Accident in e rese-*vo- during gp&mfe?,. that did not causa trouble to the earn itself. DPC Dam-ripe to partly constructed derr. MR Major mptm required tisre to datanomtion, o r upgrade to comply with mara modem stcncctoc The offecl of irrproving yndorstsndrrtQ of the behaviour of dates that lias resmted in mp-eved rnstbods ot design and construction, is sbawa fey the '.ordud failure?,' di.issfig various periods. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 15 of 145 ED 002061 00172724-00015 During She 80 years 1850 to "500, 139-, occurred Daring the Cacada 1900 In 1010 triare ware 7% fallaras Daring the decade 19*0 to 1020 there were 4.8 3h (.*} Daring ine decade 1900 to 1030 there were 2% From 1930 to 1040 and 1040 to 1050 there were leso trae i% During tho ueeude 1950 to 1060 thorn 'were eheol * 2 \ . Fufe' defers about this study of incidents to dams, e;<dudng failings end refuse dams, ca r he fem e m iCOID (19740 as wail as in ASCF. (1975) and (1988) The iCGLO Committee on 'Ts in g s (Hams and W eda Lagoons has attempted a sknirar epproatd for takings dams, but has encountered a reiudanre amongst toe owners of tailings dams to espouse incidents or failures unless they same inte toe pudic domain through tfe media or published papers, in North America, the Talmgs Dams Gomnurie of U8COI.D collected dais about tailings dam incidents from punished iitemriore, responses to guestonnases and anecdotal information. They coi'actad *85 eases sod pddshed their findings in USCOLO (1894). Trie Committee agreed thsf this publication could Sorm the basis of th:x present -port, which is pubfished jointly toerween iCOLQ and UNE? fUnited Nations Envirorm eriai Programmed This latter crganisaiion aponsored a iferalere srsamh by trie Mining Jouma> Roscam* Services, going pafe o--% tc 108-3 The Research Semises confected 52 organisations m 18 countries. Of this group, 23 agreed to participate and ware sent questionnaires Rom which 20 replies were received, A ist of 2S indeents was compiled, m addition to the cases collected ey JSCOID. Thu SCOLD Committe also cefisded pubiished casas, many passed on to the Research Seryioes making s grand total of 221 oases. ;*) I" .he 'om m -. --ml ma a,span !k , fia Anglo-Saxon usage (full step and commaf " as rises sriaplod tor Ihr" cum itfee. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 16 of 145 ED 002061 00172724-00016 2, PRREQUISITES FOR SAFE TAILINGS DAMS S a m ite imsgetv "as led us to the tesissdon that tailings mpoundn'icnis ore prchabiy the largest man mace ructunes on earth Thair safely. fof lbs protection of life, the environment and properly, is a~ essential need in today's lin in g e&ersfons. These feeders, and the relatively poor safes/ record revealed dy the numbers of failures in taikngs dams, have lad to an increasing ewsruness of the need for enhanosd safely provisions in die design arid oparatinn of failf-gs dams. The rn.ni.ng indushy has a loss than perfect -soo!o when lasings dem failures era reviewed. Examples of notable* failures that .nave been easily to life, lee environment and to asset value, are given by Table 1. teres Oefpber 2QS0 Mrtir Country Coal Corporation, Keoluky, USA. Q.95 roiliicn srp coal araste skniy mteased into Hxtai streams. Rso kill in River lo g end drinking w rie r intakes had fe de dosed. Sept 2000. Aitik mina: Sweden; 1,S million m; water released, March 2000 Borsa; Romani: 22.000 t tailings coniam.naied by 'davy eitala released Jen 2000 Bsfe Mere Romania; ' DO,000 n r cyanide earsfamirsafed water with seme sailings released. A pri 1080 Piacer Auriga nei Nona: Philipp "es: 700,030 i syaffide esntamnaiad laringe releasee; 1? don ine buded Dee 1998 Hiefye: Spaia? 50,000 rO adeifc end tsse water reteased, Apri 1098 Abbsleiiar; Spala: db miion nr tal water end sfarry releaseb, Od. 1597 io Vatey; USA. 233,000 m3 tabngs end mine mele Auq 1898 "1 Borea BcSivia: 4*10.000 I iv/a.-lved. tytaren 1996 Derecpper iiipsinas: 1,5 miiten tenrec taflngs rateaseli Sept '09S Piacer; teSipptees: 50,000 re" mlcased, 12 sdied, Bua IS iS Ornai; Oayana: 4,2 misteri srf eyaetda eiurryralaasad, Pah 1S94 SDsrnsspruiti Seuil? Africa; 1? Uvea test 500,000 f aluny Sowstl 2 km Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 17 of 145 ED 002061 00172724-00017 July f955 ja n 19?S No* 197& Fab 1972 Sept 19?9 Slava: te<> 269 Uvee lo a ,?mops fiowed up :o a kn, Arsfum s: Zlnssaewe; 1h/to 1 toa lost, 2> 009 m* flowed 300 tr. Bafoteng: South Afora11>! deaths, 3 rrtiiion r r ' slurry flowsd 45km Buffate Creek; USA: *2S Ivas teak 500 honras destroyed. Mfllra:Ea.mba: SS deaths, 61,000 o r Isle mine workings. t steer examples: Saaipisas: Bouih Africa jteshan. China Fie Bac ,,uto; Brazil El Ccroro, C oso 1992 19S6 I9S5 UteS Afteno, n at ha Jessys.fhgo fc tea unheal issues teat oar attest tea lo ry .err: sefoty of a teste's'-, cam wd pa* ywrteftes teranenesn the s-fe os the dorr. Toe pamem foetmes iVuiSmp the design of a us <sue dwpecal tee i,ty lootedy; al The sate of tailings c-eiivery ana oomrlia: future changes, &} The properties s i the tailings essd oetenisa: future vaiwbons, a) The tnflusne of additives on ?hs properties a.g. toicKerw ftoseutants, ril The properties at -he dispersal ossa site foisndatinns, B) Possihte toflusnos of selsmsc toteTng. f Rsioiali onto , vasamt an rates g} Ftsqeirement for wafer cover and lie depth. From the petet oVk.w 0 u : item -laeA feetes-s affecting suability teciode: 1) Detailed feuncalion osid.t.oos. 2) Ultimate ne;ght and angle of tec asiter stops. 3} The rate of deposhloo. anc- tee detailed properties of the faImps. <t) Puvto en of adepuese dramege. See titeftes No 9? {1994} 5| Sstemto infteences See Budortos No. 98 6f Conbcl o? hydrology to avoic overtopping or dangerous rises of tee phsastsc surface within the dam oouy. See ButieHn No ?t>f C ite 5;. 1 o begin at the beginning, the ehatoe at site is ell ;mporiani to, general tailings are transported as a slurry to, a pipeline or, somokrnes, <n an apan flume where flow can be cat sec by gravity alone, so teal the dsposal silo can economically be som distance toem the precossing p,ant, gsv.rsq a fa sly wide choice of s.te position, "tea selected eke (oust ho of adequate size so that tea talto-ys cast ae cepusstad tofewyhoui the life of she impoundment at safe tares of rise or emtoankosent siaging and w;tn a final vc'urrsn to satisfy too pwdeted veteme a* srirsera, extraction 16 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 18 of 145 ED 002061 00172724-00018 Ti-.(9 fsiter unctef-drainags system >s a critical facility test has o^en base oye-'ocNeij in She pest, resulting in dsrigenausSy high phreatic subseas wphin h e copy o? the tailings dam. As is wli Known, the outer slopes a* a tailings dam so very sensitive :e the w e ! of the phreahe surface . CasfMary ns shove the maaeured position of the p'r-msbc suriace can maso 'he vtewgs m tens zone to he doss to h it saturation. This condTon een produce ;'nypx*tody hrge rises of the phreatic surface from tsrnerkuPly Pmtel smouhts ot soinfo i From the point of view of the latinos oefvery and `imposition system, safe design w-il incorporate the aiioropnate selection of n system that edit ana;.,re toa?. teeaksyes, wear anh tsar arte maintenance he kepi to a minimum, end that the supernatant pod s always contained safety, with arieouafe statutory freeboard Fais is of particular importance in the early oeoosifioa stages of a new faddy, wham cerefui design s required. With paddock typo construction, tilin g s most aweys be deposited krst into ihe outer paddocks to build ,,p Ihe Surrounding darn to safely ,,o fte n ihe mpounoment at all times, The outer bank's can, >f necessary, be raised ron e rapidly by use of hy-oro-cycloneo, or oy influencing ihe dsposned oeseh sispe. rtfeotiva g o d ly ccmbo! end mcnilenng of the construction process for nornpltenes wdh thn design and works specification wstl ensurn long-temn afteshvcmsss of lease '."mporicnta, i the starter d en ; the file r drains; the decent fam ily mstalted ns-ronentelion fees Bm/efrn No l i K 1996} and the taiiege delivery system. Cuntnited management si tee deposition process arid tee oposatino functions of a te liiyp, dam will sign,huemly ntigncs toe safety of a tailings disposal facility. Tailings dams usually' have a significant deposition 11%, enmmcriy more teen Iwor-ty years, so safety manegemerit ansi checking ter compliance wdh the design or modifying the design to accommodate changed oimumstanoes :s as essential component of the operatic o The cafe day to day operation must be managed by correct planning procedures, that involves measurement of the volumes and properties of ?f>e failugs slurry being oeliverad to the impoundment, and monitoring the constmcbcn activities in detail. The process of implementing deois.ooa associated with the assessmen;. totaraticn and reduction of risks can be termed safety management. Owners and operators have specTc responsibilities k r bee dams and the need to formulaic safety management procedures. Technical end managerial approaches srsouic! be ualseo to improve safety ana recues risk. Continuing day tc cay safety o f Ire damempoondment system will depend on some form of observational method involving surveilianos and monitonng, using suitable instiornsnistior, to reveal internal conditions. An Increase n safety is orov.ded al an increase in cost and a oaianoe has io oe fourid between dam safety and economy Cast effective risk recucfion involves defining Hie acceptable level oi nsk, "educing tee- ris* ct the dam breaching to an acceptable va'us and Imptemeriinp emergency monsgenont peoesdures to endeavour to ensure that there is no loss of life shosJs! tee cam breach, The approach to n$i< reduction for the danvsmpoundmem system can include structural improvements to the cam and aacfiary works, improved surveillance, monitoring and maintenance. The approaches to risk reduction for :hs downstream valley system inci ...da the preparation of inundation maps, estimation of the time ot arrival t hood II Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 19 of 145 ED 002061 00172724-00019 wave nt dferons locations and ten d.maiiars ni teisiaebon ene* f~ in peme.Hebe,- ana main'.eniteee of csneiyeney cveswsx, prui;eds.s''es mid systems. Jniike wa,ag fiprdsen fsHrgs de - g* Usan away and id cesosPu test an ro.suomya nan vao.'us.y "amate" emergency sow,eos tso weight of dmiingy -a Si.eh me* <?car cause g-mat damage-, much greater t~ar teal ot an ngUVa-ani finad of water demolishing cuilsttegs satnc-" tear just flowing tereugh teem. Ida iitecU ty in finev-teg w ren fa gwe warning makes tea eperatien o1emergency pmcecuree ver/ liffeu f Ptem-nc ano utesuigomeol cementes should r s'.Ldes ra) Sim? trite log. te Ha rvng m steposmen oyetesand pasftiona. c} Fiarnteg for dam geometry cemfrai c) Flam ing ter maintenance activities. a) P la n in g c f measurement and monitor ng activities, fi Piarrvng for responses to emergencies and far contingencies, i te m -m d onaeuremoota made during dam conslruetisn will include: - i f u vo iiitw and prupeteea o* slstivrrnU ternes tenmv ns i neeis id tee cam omet and r t na water " m i grung do nrcard valuee. Fecit cn vf me phmate s dace c,i ' ofu gmpeteee o r h a dopacsted m in s, t*t Seepage dsssiixte flows fins tec filter crains, f| ffccnrd U ,ir>) urr o n b : lied ton wienm ie <r ci> st eigne afdtstress, yctefisring val jn-sladp; -te Neguso" vtctmf meperreite c i teu dam and de te c ife o dem ground level ana pe-tesCte also dam <e air r,< inspccfiO,; cf e l nom.,JC-noni re-cnsds vmh efsmsks far orn'l-urca. r) Hernir-dme and ronsc g ail "vna'fv'tesnnoca au? imuedlal salon, d) Cluse Simsou Aste itei'isnors, s) d o s e ut no"vote me r nnmiiiiv. authorities, 'Alten |udgng dm cmteifi >n an 3 safety o a te lu g s oem *>n tea sacs of nteuu~teuyi on ma fs end ciicer-omcete rens rime? <m mate hc of.-en fp tee , e-Kite/ a .,,sied ie 'd n g omidtioiis Cily den udrss~ ' odeums-.- ic-te mtete, whso! i' (St ho moi uy ihn cesw-mes nhasenf a ter s mob rai yate- m concussion si can bn scad that te provision for safe tailings dams ear de made by careful oftenticn fo me critical components of tee dam at the dacign stage by ofledivo gua.ity contres af the aro-cooosifion w H s ccnctascticn and fc- orofess.onai managomofd and rnertoring of tec deposfticn amt ocerofsng process, af by experienced engineers asid opesaters. Sierra Club v. EPA 18cv3472 NDCA ij: I'jt Tier 10 Attachment E Page 20 of 145 ED 002061 00172724-00020 3. OVERVIEW OF DAM ANO TAILINGS DAM INCIDENTS The inism aiorial C enm isson >.m Large Own? {ICOLD) and the Nst.or>al Committees ef its 5 msmcxsr countries provides s furwo fcr tBCbruugi infafsclloft amongst am designers and constructors. and da? rec,ognissd she importance of gaming from fa%sros ana accidents with dams. ICOLD has numerous mehniGai committees ids? pchigh Buliatins giving guidance so various aspects of dam design, construction and monitoring. On committee studied cases of failures; ana incidents mongst she dams of (da waded and puh.isned Lessons from D s r incidents' ({COLO 19?4i. .CDLD also heiOs a eacgrass every tores years, and the Transactions of irises Cosstresses contain extremely valuable infaunaiian- they can be described as rmisstones along Ids noth of prog-ess ,n our isubiaU. The U.S. Commotes on Large Dam? (CSGOLD) ixnducJec an imude-g survey of dams in the United Stales, upriafed oy treir Committee on Dam Safety with the resells published in iSdSdiSCOLO tSSFh Over 50C :nc:deofs wore tobuiafed. consisting of 03m failures, Occidents and msjnr mposrs ;c dorr facilities. E'dbar.fsmeni dams compose approximate y ?3% of the cams in operation, and ado: 75% of the recorded incidents were rotated to ;b.s type of dan'. Approximately 24% of the incidents ware failures, one about 42% of the incidents warn major repairs, wild the mmamir-g 34% described as ecolrianis. fix? incident dais s? summarised graphically in m g.l, where the lyae of incvfenf ties been catnparad with its cacao. Conclusions that can bo drown horn Lig.1 ` am that `lie majority of 03m failures are sssocatec wttri overtopping, and the majority of viddaufs ere associated with spillways arid ether facility structures Designers arid operators cf tailings darns also gain important n?on-ns!ion from both the satisfactory and unsatisfactory behaviour si noth existing embankments ano tailings dams. The focus- of assess ng dam padormanoe s not tc pass judgement on on iituustry c ottsch oiu"'8 to the destg'er ex censtmetor involved with 3 failure or on accident, but to gain knowledge from the 'cores of porforrnance and apply that knowledge to trie nest design or project. Ait ICOLD technics! comm.ftse on failings dams was iowiad following the fbemcan Cungmss of t'ETC, arid :t has puoiishec saverai manuals sod guides on fallings dants based nit exoarmnoe wish failings darr performance. A her of r o s e publications ts g:van in tne Preface hi midCfcit fc toms nc ooiti s .muy of gems r. tra United Smk>, i tdr Ad t, Jen mac a a Wings daw i. ud<'ht mr/sy, npuafed in Idas If .monad fflh lixiimgs dam incRieWs toitsek' rr til mtfores, aucRien s, sss-page nd -mmpas uf bshav-uo' hint did w-l mast dec gn enfoo-t f'mi hod oecarmn runny the - anon ?D1 / to f9 K j 1he coIPcikm has hum eupninmuntsd ny a rocoitl mismgr Jem nounm survey mods- by Ih* Untod Nations Eovrcrime 'fal "N gfeofna {U \EF), one ms cddvO EE coses to tl'o %!9 me dents. T'<e N sii'i iu i iecc'it '4 ih' irutdsiii si'vev cuL\ s nvii by * g f 1 t sit ? sI t>a n .irbn" cd oni-onm go' f yrct" tn r h Pare-t.s?. namwen t"0 I `dt.-Di tj ard f j All the Fig. are given at fha and 011-a m n faxt idhapw r 1) Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 21 of 145 ED 002061 00172724-00021 tho UNED.'fCOLD dblectod data It should ha noted that a Ida figures showing ladings dam dab are plotted with the number of incidents as -da dependent vpnado F:g,2 shows an increase of madams starting w the mid-1000s. "h A tncmass a mast iksiy due to tho larger number of tailings dams oofistruslad after i 960 combined with tie mars thorough dacomemutioe of takings dam operation. Tito USCOlD anti UNEF surveys have oravidsd a folai of 2i t inddents for ccmoahson. Cta.iy all incidents haws not been reported, ant> this rosloctsd :mmher form s subset of lit actual number at tailings dam incident that have accuned nram Ids arty 19CUs to 1896 rim follow ng discusson of results is presented in terms cf the number ef weidenis, miner bon downstream affects or cost of mps>r or remediation. A comparison of he number of moideois with tailings dam height is given by Fig,3, where if win do seen that sdob 5?% of b o Adeems occurred >n dams less than 20 m htgh, A comparison c f actual dam feiiure witn asm height is given by Rg,4 which snows that approximately 83% of the feiiag-s occurred it dams iowartharr 20 ms. Worm w smpeunumeni has becorna completely fried, or when tarings proouclicn ceases, she tarings dem arid its retained impoundment ss oeschbed as m soi.m I ms does not make Idem immune in accidents or failures end as shown ay F-g.7, relatively few incidents were associated with nectwe dams A eause of faliure of inactive dams is mar ease of pod water tevel, b '-ngihg the pod moser to the dam eras! thereby hoogina the phreatic surface to lit downstream slope, iead.ng to evedua; dips and vsrioopiny. A method to void the ovedoppmg of closed impoundments eonssfs of buiidrog a subsidiary dyne some chAgroe beak corn the crest cf fne tailings dam to pCffCif the level rjt the pood water m nso dun-ig au emergency without dsteng the mam dam. "ho section of such a dam in G omany A. rwown by Fin.5. As can w el os imagines, toe typo of construction of the. failings dem must piay a cart In its behaviour One o- the earliest and the most common types o* construction ;s by the upstream method: takings dsms constructed w.th teil'ngs by ide upstream method have been documented in South Africa so the early HIDOs (types of construction have been deaertfead >n Sitfiotin 106} padiboua! embankment dam whan used to relate impoundments, are refersd in as water retaining type earns. Because of the risk of failure of dams hultf oy the ..pstreaffl method, port-cuierty when subject to earthquake shohirg, toe dow"Stroen method was devGoped. and there rs a cent/oiire metha-e that >s a compromise between the Ictmer two methods. As Fig.6 Shows uiesriy. thuro ere many m a c madunts with dams n u ll by the upstream method than with oilier types, hut a.so them are many mere of these type of dam titan of o!he>' typos amongst the examples too! we ere conscjenny. An ind,cation of the causes of incidents, h r active hoc inactive failings dams are given by Fig,?, where it wi:f bo soon Id a the leading cause of incidents for active dams are slope testability, overtopping end eortnpuakc, For Inactive do ms, the ieedmg causes of incidents ere overtopping and earthquake. Fig S sirmis*iy shows melded cause tor active cams, sneaushag `lures form accidor-ts. Fmeily. Fry 9 shows the total incidents with t-ftir cause separated by taifnge dam tyre This figure aisc indicates toot toe leading causes for incidents are slope instability, earthquake smo overtopping; particuiery so for dams constructed fey the upstream method. The incidents must bo ravewsd m terms of the number o f particular cam typos in operation. Id a upslroam mefcod t$ the eidesf and most eommenty used method of tarings dam cor-mructicn. This m e ro d , as ponteo out by Mittal and Vlorgenstan' t W??;, was issert at sites oner te ilia use of fconcuficn invsdgai;cn stnd sfepe siaoiiif.v 20 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 22 of 145 ED 002061 00172724-00022 anc$!?$cs. On the other ^erd cams buii: uy th r -iAvei ennireSing* .nethod snow rd o riv ,y tew ir">! -th nta nut S "Ust c,e y 'ogniand it ,ii sign fcarte y fewer darns of this ty^-e e>, Si >"S runto'ired w,t" ten re, mte-te belli by the /p&'fur n meivyd prcm tee rsvtevv of waiei-slorago dam "*<;cint=s4 k<?y dssign fadore nduds regional candikorts <eiwnaiic condntoa'S, design dorm event tor spillway sizing, and ibc dessgr eanteuake) and site spadfic, cnndirions {dam and reservoir toundsliorts and slope conditions. nod on-ske construction rnatenaite Water sio-ege darns am designed to rotate and release water over a "ange of operating level ccnditions, s vvoil as pass law s from largo storms. Keg periods of observation include dm conastiructot, initial n sw v o ir filing, anil die response time to tetea! ffeling Maintsriance and t^pHsr bPCO'e mote important as exposed structures, such as spillway and gates ago and worm. Witte tailings cams, key design factors tecludo tea same regional and site-soeefe conditions, but also ms.yde H e mist protection schedule and takings characteristics. Taiincs dams and impoundments am- designed to rotate msiartei that te r tiid y discharged wto h e impoundment as a stony, aod operated to provide separation oi tre tailings sciics from she transporting water, upon successful -setematem, tee impoundment is essentially a stomps faciity for solid myteusla wste as Rite impounded nr entrained -tgusd as possible, although it is very oitdenit to rococo tbs considerable veterm o? water retained within tbs pore space between the small paotecs --fy-ru *r-g the m ir g s Additional drainage can ba provided either py including drainage layers into the Impoundment daring construction or by msfafing vertical ondter bcrrtontal sand drains at a later stage, Research work on the effect of water chemistry o~ tee density of setting tailings and the effects of naiteids in tbs water has neon desenhad by Vaughan (IbSS). I r e application of ctbrsiiers of audio frequency dtmng sed'mentation was feunu to increase the density of Ida doposr... The impoundment is typically designed to contain water from a range of operating weter lovdi oendkions, as well os contain impounded water from large storm events The containment capacity tor free wats~ must be maintained despite tee ever rimessing level of tee retained tailings spiles. To :educe capteei costs, tailings darns a mi associated mipcuniimant areas am usuatiy o,onsfn.scted 1 stages or abases. Protection bom stomas is ma'mamed by civsesioo tit upstream drainage and providing adequate sapacity tor prenipsiabcn directly on the impoundment area. m compo'teon vote water storage dams, tee key period of observation for a failings dam is tee e>~bre ogeraiirtg life of ihe impoundment to ;fa complyi'on and during its reclamation, Tnis differs completely teem water-stoiaga cam oyarsiten, because teifinga cam canstruchon and rnpoustement filtirig are fading piece throughout 'tee milt operation nanotl Satttomunt, ennso:sda?ion end draraga of tbs, m ir e s is occurring ihrnogho--i terr c-orntten an well an for a period afterwards, bteinmnance and repairs t k* pisco n m ,g cna-nt o~ ann no some teas important after reclamation as operating onrt`10'' Ufe Jpj**' ct renewed Tne design and cparotion yf o tsiinys darri bss h8r. dsscncod as sa oxampia of :he rtesorvationsi aypmwcn io geotBcbn.oaS oociaeoring, no risscussod hy p eok { 1S8P), svbero site design is basod on tee nere rtorrcaflon available at th timo, with ciannep ccntingencies sna s,,:bsegcent mocifications bssod or> camici ohs&rvfion and mpo tpring of tee nitiai consteidian and opomt-oc. Ib is <s tno case i- t*'o midai design ni Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 23 of 145 ED 002061 00172724-00023 vs~$ bused cn ihe ^ey design teeters listed above, followed by careful observation and mus^oi ny Ih c tailings dam Incidents disoussbd here reflect defeiersces in h is osser rxt-orai apt teach The incident survey fesulis show `.hot there is no overriding cause nr mechanism tor ail tailings dam incidwfs. but it is intended that readers may find examples dose to cases edsr their control and benefit from the experiences recorded here. As shown by Pig,9, incidents aro duo to a number of factors tecteding overtopping, static and seismic instability, "seepage end internal eroaon, extern^ orosion. structural end foundation conditions. hr addition, no type of failings dam or operations: condition is particularly tw n w ie horn incidents Although lb * majority of fsil ngs dam in c ite r# a(& associated with active tailings impoundments, a range of types of incieeute nave bean recorded at active irnpoundmente, Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 24 of 145 ED 002061 00172724-00024 4. FOR FAULTY BEBAV: Water is used m the grinding a~>d processing of mineral ors ior the extraction of the required metis, se that at the tad arel of the prccess.ng, fr.a discerned takings :s m fne fom; of a slurry o water and minemi partidas that i fie in a channei or Pipeline, Taifngs that corno from che-micas and ether plants is often stored in a simitar way, bat trie material is not always suitable ter d a n construction. A cjtef best of water is included in mineral failings that cone to an impoundment. Teg mater in its wet fona is unsuitable for b an construction, Water car be m novsd by drainag under the downward paii of gravity, by evaporation te the atmosphere and by sonsoiidafon caused by gravitations* aobon on tbs mineral paramos, which sett! inside the mass of the imooesdrnsnt ieavmg frsa water that nan o r nscasisii or pumped iro n the surface ic e coarsest paddies used for the construction of the dam have the highest permeability of the tailings mato-igi so that the wale- in the pores can escape when there a n adequate dminagu ovfe:s, VVtb a oam being built by the upstream method, the coarsest barbeles sake out nearest to tna crest, with reduction of aadic'es sLng with advancement down the gently sloping peach until only the fnest partidas are left to ;r< cerned into the pong where they settle. Wclte the surface of the water in the pene is vssiole, with distance moving downsifuam rewams the dans cmg?, thra level of ;hg water within the tailings, referred te as the phreatic surface falls as it approached the downs!ream slops whsr h een drain out or evaporate, In seme easy dams, built w,trout drains, the positions for the pereak. surfaces under various conditions, em shown oy Fig. 10 Vacations of pdeernem, parficio sisas etc., cause the body of so impoundment to be extremely anisotropm with regard td permeability', This results r cqui-petenfioi lines that are far from vertical, which can cause a r incorrect measurement of the posfien of the phrest>c surface by open sfendppres that have long mtsls Users, kiss ieysss ef mafedais of law permeability can produce aembeo pr realm surfaces. as indcated by Rg 11fa) in fad If ss essential for the stability ef the dam that the phreatic surface is kept well back *tctr the downstream slope. Ween it is allowed to move downsrfeam by aiiaw.ng the pone tc move toe dose td the darn eres!, odai small rotational sips wd occur wtmm tne pbreelic surface meets the downstream slope. Dow "stream slopes may suffer slight gdlymg caused by rainfaiy and first signs of a cioso ahreatio surface may be given by water issuing h tu one of these guifos. if there ,s no rerned ai action, small slips may Cevoiep. deepening dm gully end moving the Surface of teat part of the downstream slope oven tunitsr back into the phreatic surface. This leads to larger slips that continue to eat away h e base of the ope, until the whole downstream feee becomes unstable, m the extreme the stipe may reach up as far as ibe dam crest, removing sufficient of If to permit of overtopping and fahure ef the darn. Thus 0 can be seen mat complete control of the water regime is of the utmost imornance ;o maintain me stability ef the darr. an;! impoundment Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 25 of 145 ED 002061 00172724-00025 Osrm bissi! by iby downstream method ose fee cpirstfef traction horn the sahn ss usually separated by ?h ussg pi hydm-byciures. These snpie machines. Juafrafed by g .1 i, beva no moving parts The tailings supply enters the cyiindficai shaped body ssngeteais'y. producing rapid rotation, tbrow'tsg the coarse franti*" in ten periphery where >t moves dowsm to ctettearge t<nm ihe bottom noae. wh<ch ss made of sdiueiobte diameter so that the sloes of the discharges panicles est? be contmlistJ Too sm aihr Use race of ducharse pertefeed, tea larger the esees. The fmesi if actions tesse f t , sxrsfft o f iso ow:rt'og mass pass ibmugh a central piso lo dsenarge from the iop o mo bvdiu-iw ltm e, usoaity counseled cy dpivery pises io he discharged inte lie SSOpoti idiUtei' Not sii ta ls rijr orbasti a ruhte esst vusssrm p coarse i sarte s.zej pedite for the construction of a .ir,ivnsttes"'! type asm ion changes heve lo be trade in che construction e mhud to 'oitepofata trponsd h and/or cnange tP the upstream method from tm-e up i-1 >' u' hi. made a! a t rees Sytesg construction io ensure that good den Pipo m oosng rut ! sito the catti io ensure that there is ns danger p lisa pteeade ansiar, inan a ltnocm g to she cwnstresm dope, in gene-te1, dams bos'; by !hs dnw sho''' tss ce dm! nsufesd os much ssior than loose built by the u m fp#'o meteor, pas jsc,ferny w,,e ' nhsu', oarthgugite shafenq. f" f t exceptions! cterumsiences of fee dstr being sonsimoied of material that, w e ,n olace, proved lo be less pesrreadf fa s' f o d ir g e d ims rntprsog tee pzrestc surface iti the data car? rica te daogercua levels, causing testability. An unidentified case has seem repotted of the- failure of a downstream slope doc :o feus cause. Cleat iy tensive drainage sheuio -ave seen pmviced n ibis cam llil. it must be pointed out thai a pemieabiiity value sc not a pmpsstiy cf a particular melensi, in o value vanes wife ihe itensity of the fsil, ita emgre of saturation end osfticuiaby with the values of existing affective stressas Appropriate remedia! measures carded oui at ihe r.gnf lithe sen prevent expensive and oiten fatai occurrences. Tbs responsibility for 11*8 safety of tailings darns most he vrith the owner ot opsratm, l i e owner or operator of feo rategs dam end retained impoundment lisa to ensure Usai a competent nersoo ss engaged tu have c-varsB charge of constructor end Ifsat ' Ip g vets '.lie power io make modifications to tbs methods of construction being used and h the extreme io step further materia;* from being ccivered to the dot" and imboondmeni THs may meutee ino enferphec to operate en omsigency tor ics! a second) disposa1faculty mio whists the iailngs flow could oe ofended, although so North Amanea, emergency impoundments ma? tint be ranwdered fsasibie due- in ihe cost of cbteining permits, pmv,sten of a -teer and Iba freebnam .'quis'emetsis domaodsd for on emergency smpoutidmer;!. It is otte'* saio teat there shouts be an ooemi ons manual fer each las ings oam, omiten by tbs dr>i rjs<n -rr- -sad*m- b "-m ris nng the years o! operation to ensure teat si asways provides practical advice, in North America an opesraiscns manual is a reduced past of tre parrmttog brcese, and- n is modified into standam operating procedures or simplified guidelines tor operational personnel. Tills approach can be dangerous! :f ihe personnes cp; sling construction do r ol frsfy understand ih ini cite.eiten of sente o? ine racismrrteesieisnns. The manes! may sises have become a lengthy bocs.sutenf end Staff may not have time to re-study Ina mancai and from ft work put the correct reasons to an emergency "bere ss no sussistete fer e competerti engineer te pe tetsy rassoiisibSe fer the safe construciioo of the dam, Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 26 of 145 ED 002061 00172724-00026 Ropu? rspoceor ss an tmcortart part o f checHittg tra i th ccnsiructsars aracM a m ss corseci and trai no badasi misskea ans fseing ruist j^to 'ha sorocisbe, Gonbin&d wstf' reguar inspact'on ss th 0Q,r8ei and rg;b<e fponiioriny of ai' insi'Ufne.''.l8iinrf and th tafr.g vi tneasureroents> giu. Aerai p'noiogruohy and satellite megery can bs c i arsa? haip io obia:p iha eversi! vtew ai th way th inpoyndmept ss neveteptng. Bui, apparenti? afficieni inspeeiion may prova decapdva. The? is a s;ass svisare iattura sedurr?. 'Min an snspector drivsng an and smuriti th dam -sispeGiseg si on a ssmscontsnvoos sasis. IM o s s iespector hs$ a good knowiedge of dio beaaviaur of taiSngs danu asid ras ai nis. disposai Instrumontaiien ?o rovsaf to hm ine condlons witn-io tre body of lise dam and t& foundatfers. sosti Inspocfion n a y se riot oniy boss bui ase " ghly dagoross by gving io fraragsm aoi 3 faisfc serpo of secunfy, Ars exampte et th wesknwss and dsngor oi sush ir.spechon wae given Dy Ine exampie of indiani to .?0o; ssridar delas's are grossi m Baetion 6. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 27 of 145 ED 002061 00172724-00027 5, H ie fa'iunb u fa filin g s dam and it** Mncnritrofaci reimm. s* Ma , >u <nd <4w -1 <.p jy hve sedans consequences 'or <re pubk safety r , . r m-inmmom .j<d * a ; u m 'i or Ooersfor Some of to types of c >nsSq ,!Ti,v and s in te te~ 1, ,|< w>eg, * Economic Consequences: mcucad under tris heading are tea costs of repair or reconstruction at the dam and impoundment and the effects on the operator o? tro facility a? a te m p o ra l fee* c< sto-mge far waste. * Rubte. Safety, R ubk attention has incraosingiy focused <r metiers rotating to safety and a hazard which may affect a large menher of people in a single euiasbophe is tess acceptable? teso every day hazards wr-scr mav in egg-agate cause fa' more deaths but in each incident effect ciy one m iwe intewdusls. An imposed end invotenfaiy exposure doe to ifvtng cinc to s e r e heaarc is much Isas eooaptetee lean a voiumary exposure to a h glt risk acttvty. * Snvironmemai Damage: The release er a substantia! quantity o waste mate-net -o-hch tears flaws ova-" a large area of sunuenilng prouno may cause m-ssive arsvbofs-nentei camaya, pad-uuisriy i* tee waste .s texto, Thera arc Aso -sks associated wild soeromsmai events over a longer caen soup !s iteai 'Kspersion. ground-voter oontsmir-etion, tendmide or ground instesiiify, <* ""ho *tesk "-tsnvo-in-fut momma mvn wm to n y ng out < R,.te Aaw's-ur.trt `n asso-w t- o mpoofia M u m morios arrt ioresqum<ue~, a Kwh ft'u;ragente--i ~!'e ' tn redo e :he .As ibrouph design o' ooeiafonr s o t a onntsncen 'v e - fc ' ovnk p a ~- g'rom ntepir so io teen es 11 r is k m m m m m m Risk anatys-s can he qualakvo or quantitative, " he term qum'teave risk assessment QRAj refers to the technique of assessing the frequency of on unwanted event and its measurable consequences in terms sch as number cf fafalktes or cost of damage raise & Vk. 20001 QAA techniques are advocated by many regulatory bodies to assess tbs safad/ of modem comete x plants and teak protective sysrens (U.S. Department o?tea ulterior, Bureau af Reclamation, 19S5H U can tie questioned whether GR, as used in the procese industries, involving large numbers te fault bees enc vent toces is appropriate for the assessment of tee safety of tailings bams ano waste irnpooncimeats. Qualitative Risk Assessment techniques are sommomy based upon the "Hilera Modes Effects Analysis (FiVtEA; which was deveinpsd as a msuil of tee Bhopei end Cnaiienger disasters. McLeod and P.ewes further oeveicpec the methodology te quantify tea environments! end somc-economc cocsecuer<es of failure for sateng facilities. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 28 of 145 ED 002061 00172724-00028 " v rfe? a-essamo m pvcess 'tes rtupy vana;!et ore* spnroecbcs fVick !9s?k Tue COLD uuboommpfeo .m Dnm SteUy o cu'rufey ,,fyjpjtv u a Buf'ete oe R<s-,, Ai>s.num aid, ulthcug-i r. u oUdmsssd tteAQfdi water slu:c.ys clan.a, tee soni pdndpias ap&iy io t&rifeg tedd/as. R isi a n s lp is shoulrJ eamfder fbe maio componente s f th fa d ifjf whist* delude: Dar and Fourfeahone: * Hes th darri been designer! by competete ersginesrs, u,dh rd e f^te-te <n toundaiion conditicns. inferrisi dminage, dopa stacdty- seism ionteng. and oonterrdant cooianrrisnt? * Wtessa taiitegs or pydorrsO and ara usati for xinstrucaon. ha th stmctura baso assesseh vwlh th sema rigour as an arth/iracMili dam? * !? fes dam riSTOmsnitod and/oi' momtored. sa as io 'oveal ay ebnomiai bahaytenr? Wafer tewegament Systems: Ara ine decani systems saure and bave- ai! pipes tewugh iba data cr foundatfon been adeguate!'/ seafst! anri/er protected gain! piping failure'? !s t a r n d c Ie r i flood storage capacity? ss Are sp4 ways anc/or dwars'ons atieqsafe loi *<*desco fte-vy/ > * Ars te m any hazards associated with b a t-eenu fervesy tn~u and zafes reetelm linas? Cmsura; * Has fee structure hsen d eign ed fe occommodote cxts.itai changes r upending ccnd4.cn cue,' pm closure oedod, e.g erosion floods, sediment inflows or naturai tendfemes, ote,? Ara the ofessure works suitable to reduc fea ptetela! tef eentemnsm transport? S J RISA A R A O a tE R T There a increasing recogHtiers of tea roso the! risk management hes sn cam safety assessments (Bowies ei a! 1997). The ask assessment process wil. identify a number o f risks associated wife fee tsiings fed!?/ The o&jecsivo of the Rtek fdersngesnenf Rise is to apply comnensobng factors to reduce fee eve! of risk, " he Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 29 of 145 ED 002061 00172724-00029 main grass of dompenstoirig festem r p r a toe rclicw ag Onsign. These may be avi! works Ics inetsdsa the safety {e.g. bun ns i, additional technical and snvro^monisf stadias to t e r g a Ilia lava of cenfiUsuGS in the assessment, Tac-mpr ~"h 3 cod'd r u b ric isolif pm-savo one a tofm security systems to cainguord ;he patii sson * i? e sc orai eg tor liTes, ftoototor-ng and ineeac-ion systems: ""h s siiowe early response te changes and dentines ccn d itcrs wVieb may be changing over the tile of lite feeily. This includes toe requirements of quality assurance ami qualify oonlroifOA/OCi throughput the operations. * ff a nfanane programs These inde Jo sm h 'mW' as 1'.i>u.njnco cf diversion end water management &truct<*ros ^"iacct o" o' tomrmnd fatoiilias. access roads tom * toansgemeno This intgriss src-amisico roguimmonts, training of staff, ropotong and CodoratarPub ic assurance. Trace-to? siedine me required to optimise too condbeoeflt of various compensating i'atoers with toe proportionate -eduction .- risk, Owners and ecarafors "ava specific rasponssbi'ifies fu- tosi dams arid lha nesrl in formulato nsk management procedures m r is i m m m m m m m jm Ali feciiiies car?y stime degree cf nsk, yen afte? dah manayesr.enl pigna nova doari imptomeniad. A, nsk eonfngermy' pian is iherofo?o raquired io addrass l??osa esks which carme! he siminated, Conhngsncy piana are mqtored fo sddress th a-goired action ano io rmiggt toc conseqjances if Ina event occum. Con? ngeoey Plans am needed to aridmss issoes o f respon^biiity, notifcation, energnacy "spense, leenritoat mamfodrig and technfcai responso, and orbar issuss. As veto any siructof ;hgorefctoiy eapebia of ontusbcpiic ta kifs, iail-ngs dams equina a esntngancy piar to ho doveiopod fa deai vto a posatola aecideot As fa.knys aeeidetos may lavo y sitile- physxai and chemiesl ccrisccuertces tor persona aeri h e snvsonmsnt, doto to' tossa speda oesd lo be considsrad. to sddition to th rsqUremonfs fer suopert egegment il io necesssry fa nave .3 etoar commo-itoations noe ODordinaikto pians to omor tp m alaga th rssgenss. Emergane* responso Plans necessgiy -equire thal tha oo;aoi:a.iy afibeied community uodersiands witof II must de io ossa of acefdsnt, Puolic sroatoy sitar aoiil tram tmiings ia gretoly redueet f endarstandmg to toa reai consequancaa has oeeo boli? oemm aa inddem touch nsderstandng to mposstoie 1.0 aobievs gite as iactoeni. baeguso toarmag ahiiity s ttm.nshed by b?gn anxicty lavato, soc a iow leve* o f fresi al fflat lima, Snergsncy ragpons piane aro q.aed uf'. ho n e * wisw s iitlpoaodmanis in tba Unitari Status of -n - <tr a u h * ou.<i?ta~, fpo db Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 30 of 145 ED 002061 00172724-00030 UNEP's APELL {Awarsf'^ss and Preparedness for Emergencies at she Locet Level; Program has Lees designed to hasp compands local government and fee emergency seances put a coordinated plan fegefhar to improve public preparedness in case of industrial accidents, ircftd in g tease that may arise at mine sites. The APEU. program involves al> the affovted padnc-is n r * wJufs A is not a unilateral pian nr, rhe pad ef only the company n*" the emergency services. An informed public -Adi i dullf yunstion if? acceptability of any externally imposed risk, I! is common far fh <vrr many t> ir-bortnke a Piero; ign rich management plso end it can be a very valuable tea! fo incorporate the iocel stakencfders .nfo me process fldeleod end Ptewes, f999), This snows the potentially affected community as well as the ` rosponse" organisations lo prepsiy unde-stand the issues ana the best emergency preparedness arrangements, Tno APELL program has been applied if' many industrial Situation around the world. Toe APElt. fisndoook ana supporting matenai is available in over 2D languages, and share is a pool of United Nations and national experts to assst companies and cor>m!i" "i s n 1ni'y~ng onergenoy oreparo.Inese plaits The proedeturo is directly epp >r -pm ?- pei ngs taciiilses. Sierra Club v. EPA 18cv3472 NDCA gg Tier 10 Attachment E Page 31 of 145 ED 002061 00172724-00031 0. LESSONS LEARNT FROM THIS STUDY g ,1 G E N E R A L A S S E S S M E N T O F THE L E S S O N S L E A R N E D A atody cf fee case seeerdc euntasncd toss Efefebn mo* :rq an nsight r ta h o duhavio^r of a pcrfe u an 1st) ngs dmn yf o n w m to toe ' uace-' 't ss vspoefeu h w u I tc to u u w it fine ito ns el ntesast feat be aeptee tu dams a id n.peundnicnts for wto* h feey r e rro*-Mhs, A g. iwrei ywes," 'V-n* of 0*;t v -j r m an f h-or toss co 1tone cf case sao'ifife am geme by th several punts feat 'ol ws. Although our unde-standing of ihs behaviour of emba-rkmenf dams "=as improved le the drat they car- be designed to bahave cor seedy. a id m 8"y of the ensign features can be appfed lo the design rd toikogs Parris, tailings cams Continue to fail Durny Ida decade 1979 to 1989 tears were 13 failures. The decade before, IS68 to 1979 dad at least ana failure every year, and Has moat recent decade, -389 to 1999 suffered 21 reported failures, it muse. be emphasised, oowaver, -bad failures c m occur without reaching toe public domain. OHy the more serious coses the? attract media attention are the ones we hea- about. Those numbers rd failures may wed simply to ile d the eves increasing numbers of tailings dams being conslructed together with the rscreasing numbers of closed ladings dams, Cooewershon of die totS' number of operational and closed impoundments, the percentage of tslum s would be seen as aec-eesng wt-> ccvan-' ing kmc Ib is, unfertuootey, is ef Idle comfort to fid cw? or of in s of tha d.-ms that Sals. aitbosyh it would give an fed-cafson tom He mefeuds used ty I' t g n A o ,io n tor the design and ccnstruchen of la ir g s d im s am stenoiy im rrrving * it con he argued tom failures ere due to inadequate management. Tho erf and science of geotechnical onginoehng arid geology, due tbe detailed research studies of the behaviour of embankment dams, has given des.gners .suffocat nfcrmaUon ro arable of in,a design of safe tailings dams, toa.ior differences between embankment dams malt to retain water reservoirs end feiings dams, are that the embankment cams are designed by specieis; consultants, who supervise tne r ccrsttocfton, codify feefe correct completion and supervise the first fining of the reservoirs. Subsequently in E n te r r r d to -teny other c ru n k os, Cams by law-, ere continuously supervisee u cfvck o " toe r senbuync saisfactory behaviour, ~hia is dene -with the u u u! ndr freto-Tm ustatnd sn tbs dams doing '.hoi'- construction, as well us visual eiwesvnknns , r d checks on valves, endways end other euxdary works. Partly because ef the serw rats of construction this approach is not used with taltoga dams, and many of fetor failures are caused ey feck of attention fc detail. Oden fears apueare to be no resoensitoe person is toil charge of the tailings earns, and if ~s unusual for them to be wall instrumented. 3!f Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 32 of 145 ED 002061 00172724-00032 n many very advances countries, such as those o f North America, ta in g s cams are designed, cirsirectee and operated under similar 'eguiatiens end reviews as water storage dams. A difference between the two types relate to physical loading from, i t ) ilia staged manner sn wnkib tailings dams are :ypiC!ly cnnslrucled, sod {2} Fre progress:veiy increasing loading of ;hn takings on the impoundment foundation with me. * Lack of control of the hyOro'ogfcai ssginre is one oi the most common causes of M u re . Of the cases reported here, the meonfy of daturas were due to overtopping, slope instability, seepage and erosion; s i caused by a lack of control of the water bmance within the mpeunamenis. Correctly pieced piaacmetUfs and open fade standpipes can show the levels o? the phreatic surface and give warning of dangerously high conditions. There should always be prevision fur diverting water anc lacings discharge away fre-m an impoundment in difficulties. Alternative discharge, possih y into another impoundment. should always be available. Removal of water from the pond sbou;d ha an uninterrupted uanlsrreous process and blotesgs nr damage so pomp name or any form of decant should not be a:leered to occur. Damage to vertical decants car. he caused by consolidation o f the tuiings see negative shin fdetien inducing high vertical loading, .c, attaching itself to a decant rower can impose damaging banding and twisting momerte caused by water level changes and wind fumes. The aver increasing ieadng on culverts passing under a datr and npoundmont, particularly when height ".us neen increased to give ahova design capacity, crushing damage may prevent adequate discharge, particularly during exceptions! conditions Unsatisfactory 3rne~dmenfs to the designed outlet ar*gngaments. as occurred with incident No 1 7, should not be al:owed. Second decant facilities and/or stanohy pomp barges should be available for emergences, Any such standby facilities must be regularly tasted to ensure that they will work whan rayuired. Culverts should be monilored and inspected regularly to detect first signs of distress. Ai; impoundments and tnesr netarnwg dems need to bs able to accommudete extreme hyerteogic events, up to tbo ^rebstha Alpsdmum Ficod, Wetor retaining dams are normally provided with spillway sadl two designed to pass the Ndte (older dome are being modified to aceow; wiib modern Saw). With many tailings dams, however, lire tailings hods are not permitted to be discharged, so upstream fiend waters most be Su8y diverted so as not le eniar the impoundment end forage capacity (adequate ffosbeard; pop oarefel management af tellings pond warm most pa sufiom "! to accept mi Pood waters falsing olroctiy on to tbo impoundment or entering vie incorrectly diverted streams. unsatisfactory foundation conditions ce* not always be detected by the site investigation md9 for the design slags, and some deep conditions nave bean missed, as >iDsfrafed by oxerr-pios incident No, SOT and 209. Careful measurements o ' movements, the use of deep indinomemm and knowledge of lire pore pressure conditions In lire foundation soiis might be Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 33 of 145 ED 002061 00172724-00033 expected io show uo unsatisfactory conditions, Sut t t fehfife soils tbare may Its vary liftis) ibrewamteg * Ninny older dams are not provided With adequate drainage and often, particularly when mine ownership hs changed hands, records of design assumptions ore not available. Is these circumstances it is scvisehfe tor the cooditten si the dam re Its determined fcy a foil inspection snd site fovectigafion; when absent, instnrnentadon can bo installed. so that the behaviour of the dam ear: be ubaorvec during its continuing use sod raising. Sometimes addsi&nal dreteaga can he ottam&d oy the use of oor>;ontaf boring to install iubrewoit type titered pips drains. Rersed.ai measures, as may be derived bom she above exemp.es of unsatisfactory behaviour, induce toe weighting with rocKfiii faced over correctly designed lifter teyere, over ihs ctawnsiresm stops so improve stability. When these is tsme, end imorinen; oioas fai'ure -s "ot expeefsd. stability can be improved oy drainage. Hodsrmial drassrs can bo insisted torn the downstream "dope, and she foundation can ae partially drained with vertical drains instated through the lower pari of the downstream siec-e. # Many of the cases reprewsni a iaoh of cars, in retrospect the actons lhat were the cause of failure we-e due to a lank of eppmdefon of tae mechanisms test tngger failure Considering tbs cost in the m.ne owners. of inosa failures, if might bs expected that a much greater can) would be taken of tbs tellings dams. Having someone So charge of t*e darns at ati lima, supported by good instrumentation end regular inspection atts review would be a minimum requirement T-re cost of insurance agamst dam failure and Its con&squences must fra extremely high. The scion o* ihn insutanoe companies in demarrding correal caterol of teJings dams, with tha incentive of fewer premiums far those name owners who estabiis*1 a satisfactory approach fc thair tailings dams may be a way towards s redaction in the numbers of failures that continue & occur. If should be noted that in Ncrtr. America and elsewhere, a tailings impoundment cannot stars operation without prior approval from regulatory agencies who typically require hot;' an sniomai technical review as well as a public review of the design, oewrefon are! reclamation plans for the impoundment. A reclamation bond placed wifr the regulatory agency by the mining company sufficient to cover the cost of site reclamation is also required, Large prelects outside North America seeking external unseeing, squire approval ef the lec" nicai aspects of the design as wed an approval of construction, operation and recismairon. 3.2 SPECIFIC CONSIDERATIONS* WITH EXAMPLES OF INCIDENTS 3.2,1 Site detection and musehgahon The position of lire mms ip fixed by the po&ton nt tea ore body but tea rm*ton r r the mipoundmanf may bp bonirolfesif by sevens! faorere inducing cm. irenmenta Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 34 of 145 ED 002061 00172724-00034 considerations, iocal wguta lions, nnsideMt l*> |(> kn al hydciogiei and seism condemns, agg eli 3 s n o gmmidphmV - no pie,trotsmwi cimd-boi's. ~\>b ishect osos' - and > to m i-hmn -y{> wem, Km owth-mw sv'lude Robinson s i si UfHrOT M'k! prnwde a o.eftafive and smimgowTiiaiixa o '.X ti "iot-isson ami Moss {tb tR ) describe fro use si tbexs mstuuns V t-evmN u<# sons, woHb Knanay rtSHO) dosis ` wt" se ewswn n r nowor fAinSs ami orbar n v 1works A succe-ndui axsmpie d tho si se se ise protesa f x m w fonVm- has `'seri lobumented by Gmueb and Gm Sief AdGi C err's ehonp-vo cpvemob of mtu s~ C s!o ' and ode iovostigalitm ?ms hcen qrvsr by C eyk a et ai - t9Gd) Co''Sid8fobOM :4 i' e poSTan for a new impounumert must take account nf .he risk or damage Sa ffe proporiy end the anv-iormert should failure occur te tr dnrg onarahon end atser etosum. d oociti be amued af tba Ssfa far e twliegs dams el Sitava, oo dem N r 11/ had bee" bodiy chosen in view ni e W n^rpHfy nf me downem-cam ic * n and botcis foe .'mcspmrt tarings dam, inesden? Ha2Q2. bed boon shoo van? c ose an O tsfng township on gresnd sloping - a n -nio Ce town. a;.pomniiy with n regard ic rho risk it imposed. Takings esn usuali'/ um transported aver .mskSsrasie distances reletsvaiy cheaply, so ihnt the ehoos of site may oot be as imbed as m g si first appear -,o be the ansa. This ran result in greater ireedom to seeof a sie womb is r&iativeiv fme of constrains and .hers me eansequenoes nf tailors can be reduced consideraci'/ There may ai$Q be bar-efts to the wining operation as a whoie and not just te. that element related to tailings disposal, Esomale As an example, form containing cooper m mined Mgh in the Andes in Chie. ano many mines crashed, ground and processed mis nm r,r Ida w,ng. tom es brought ihe copper conrensrelu down she narrow mountain tracks distances exceeding 18D nm to smelters er far saperi. In w-nfer they coid be bete up for long perioda, Tee narrow, steep sidad valleys near the mines were used for tea impounommls, but fairly niph dams were needed for the storage of appreciable volumes of ieii.ngs, and thorn was e growing rsk of oovmstream eameye f tre cams should fain Much baiter sites for ianje impound? nyiks coafd be found on tbs HeUm -ano at tim foot of tne Andes where dm rsnfslf was less ano the rate w' evaporates greater than in the mountains, io some casas tow M is conio be joined cy tailings cams to enclose targe aretss, f - c;a oms obli mveb-'o and -gso,,c a U 'o n r i ; , seady !m p.'ii-e sm q bn; eos tin ti camod bv pipeiirw m ouemote fmes, dsdhmoui nscmmi 'g < r , dcorn fc ita -ttvr and, t!m p'-scojr-in-, ; i-mi 'uos nv> itipH p i, ^cfjocont tisv s'w " tiiv n puomimeni ti! t' 4s wsy iha rissteni'e fh.vt tbe u'ncnntra'e hnd io tre eeorert wex gtoety "! t'.re :, ro u i, '%* rortru u d ihoug" hv wini^r, aod milcgs Storage won prsnfy d r p iie e od:b prmosmr, r-'isri' grentef sto"rg thon ha nono pr,ssirifo pdidnont io 'M o. nos r he beko' climats pt fbo me-r isvde was -tac a ' acv,, 1 go te- ,he - ftcsimenoo . hw- tmli 'g s d ,,tw Cidd'ilSt fff fht Iv d a u g iiin ci-r-v- in V<rh A-rien,a, t*! it," s ifi; pa" t .us' ti-il-ngb rnpmjrdmew wma esmo apf<t>' n a,v h km Som me mme liiw >,vas dune an moi ti'o inl.ngs mip,Hlrdmwi, v;o r osmi rm with f- v mrer-fo !orog-ap" v an-" rundo-1 on naywv rebyoss r mim-gt eeutioo confemmo-r T-p o- w-oa oniehon Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 35 of 145 ED 002061 00172724-00035 erd ground at the mine and conveyed us a s'mvy by pipei'ne te the processing tent end tellings impoundmeeft Tn sit selection process fer the project Is described by Croucn aeb Pouter { I8S3). Before tee proposed site tor a ta tn gs dam can be co-"f rmed, I s essential that the site :s thoroughly investigates to cnee* on predicted seismic activity ante if the impoundment is to be steated witnln a fiver ua%y, to determine the Probable !da>;imys- Rooc, Example. The Samhashneh tailings iropourdment situated in a valley 20 km no-th of :he Sarcbeshmah Cooper Piam of ben, was mainly constructed ter the purpose of storing the tsil.ngs from the copper plant as wst; as providing a sesame of wafer far the plant, inaccuracy in toe estimated total anneal discharge o? She aver made during the ftrasitinty studies te s resulted in 3 change of usa for the impoundment. Instead of the retaining 03m doing considered as a failings dam. SI has had to become a waks reservoir, and has change has posed various pmeiems, Tng aeluai flow Curing the tlrsi 7 years of operation a bs&rt more than 2 14 bins the estimate and this has neeensiietec release of wafer downstream, despite some environment! limtetiors. This, combined with She continuing output of failings from the otant, has necessitated raising tno heights of both ibe mesn and saddle dams hy 5 n . Details have been given by Askan { 1991) sen Askar, et ai f '>94). infomnafion about the geotechnical prcprsrf.es of the fouacation am an essential pre-requisite V the de^gc sf the dam. Example. Ok bis. Papua Near Guinea, A major landslide occurred on trm left -bank nf the fivr ivla dunng arty stages of the construr-hnri of an embankment dem nfended for ta.iings 'teuton "The see was m one oi the most favourable valleys hyd'oiccioaiiy in the area, even though ft was aeoef 18 sm Bom the processing pleat, According fc Fookes and Dais 0 9 8 2 } the site investigate had been made by well Im-owa tvIs investigation specialist comps mas over 3 period si sis rnonfhs. 23 borehuf8S were made, legefner wish ft test pits and a geophysics* sumey using 20 seismic mfracbcn lines. During the per od there wore 10 profassmnal geologists and geoisehmcai stall'on the site. ""he ee `y stages c-f construction w o lv e s excavation of die colluv.ai onC tafuviamaterials from the ease of tte valley to obfan an effective oaf-off. Doe fa concern about the residua! smear strength of Ce Anyang Mudstones, further invest gafiun was fu proceed in parallel wifn (he excavation end 44 more boreholes were pdftea. During foie firne a nighly pjotesasonal review team made visits to fhw site en behalf of the Government. Tn-esr reports, although expressing ccnnern about prosiems associated with the excavation, gave no indication of an;/ concern about the possibility of the major landslide that occurred. The main site inve.atiger.ion began m March 1982 bu1 prior to comptefon of art access road in Septembe' 1823 access ic She site bad seen by long treks jrough the jungle or hy helicopter. Bxnavabon at the left abutment had maahee a depth of 14 m when a iarxiskde developed on 16'" December 1933. moving 6 m towards the river and involving an area of 11 na. Shortly afterwards dunng the nsg'nt of 6'D?" January 1864 a nv-ch larger oadsiide ocemmd covering an area of 122 ho, resulting in jh abandonment of me site. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 36 of 145 ED 002061 00172724-00036 Tii.s evumgis is given to denansfreta fee vary great tiiftfeufty making noeu'ate predictions about the behaviour of a sit, rerfturistety the majority of altos chosen for the storage of waste tellings and the construction of twiings bares do not involve such retropi le s io n s , Sinkhotes, ole mica shafts sob weaknesses above active underground nine wofengs are vofy difficult to detect during ste investgations. Karstic foundation Peoroek can offer the opportunity ter trie surface overburden to collapse ween ps briagieg action over a cavity :s broken by increases of stress or softening bits to np'fiased water that eoutcl be imrocucsU through fee pressmen of a tailings darn end impoundment. uxampte. bonds {1978} described a case of reiaftona failure of a part o f tee fee > u t-aings cam caused by coldpsc into op ole and disused m m shaft, that r ad not been eheedvfey sealed when abandoned. P' d*" \u , 73 The failure of fee Kviny iakhgs dam in Poland, descrihed by W '4 *v $ "`On,, was thought :o Isave been caused by a ei'-k hole forming .snoerr-eatr- toe rem 'VsTM m i0%%a s ground into a trgNy fractured snC faulted rod son,i,stuns bedrock. : tv. dem had neon nuftt across a taut with a fracture .tone 2C m flic k and if was nara that fatere oocu'red. The undargrovnd mfea had advanced 1u with a 200 re of the dam axis, pursuing from it had lowered the water tabic and rock Wasting w fee mme ccusdd entail earin tremprs Tire feskure, curing the night of 13th December f38?, released about 4,6 k T3a rtv a? tailings, mere fe ei 28% of the stored volutes, eaufemg Id deaths, Examute incident No.88. htefshra hlree, Zambia. lire depress** termed m tbs grourtc surface by the extraction of materials from the ,,ndergrouod mice was being used as an apparently convenient storage bask". far ts'tinge, Under feo weight of the testings and the iocreesec.' water soaking down Vote the; impound-nan!, an ZSih Socterobcr 1973 the groans pave way. reicasiog a iarys volume of iseuefied takings into Ihs min workings. 68,0(50 m 3 of teriinys ftt-nnslisd down into ids rnins workings 530 m noiow in t S minutes tefe-g 89 miners. The remaining mass was stab'hsed by de-watering wife tuba wslw In enable mining to confirms- c 1 2 m ailer is m Starter cams are commonly constructed Tom icoaliy obtained fili, trust may he so.! andfetr rock mdudiug coarse waeie and overbun1e~ from pm m-mng o-reration if that is close enough to the tailings dam site. Design may repu re ih dam to function as a drain or to form ao imparwaus oamar erto too dii chosen tmotec reflect these recukements. if acting as a drain, pore water from too impounded taiings gassing into the starter dam should be ccifscteo4in a sespage cokeciion pond ootsioe ins to of the empanktesnf and purr pud back info fee tailings pou; or dvectiy tmoft to the processing plant. When tire pore wafer from the takings la toxic, containing such chemicals as cysnics, regikebens may require tea whole impeurtomenf to so lined with clay or a synthetic knap when a dmwage blanks! would ho oiscod botvrean site liner and the impounded failings fc promote drainage ton- the takings. Seepage Tom tne knporefesrent directly info tlto ground would only bo allowed if the pere fluiti did net Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 37 of 145 ED 002061 00172724-00037 affect .be quality of the qrcmcdwatec Permitted ssgpaqfc from the failings wcu:d altoer have an initia, water quality sim-ter jo that of tee groundwater or have mobile constituents removed Iron snMkm by attenuator. 0 the soifs between tee facings 30b fr*e groutowaier. in practise such an ideal approach can net always be applied. Example. A fellings impoundment was eadeo to accept failings from 3 rock washing plan, A site was chose where ihere was a 2 r Mgh mound of mfuse consisaeg mainly of stepped querbunden. that coute act as a starter dsm. The land sloped ceni'y towards this mound that was parallel to a iouole frank railway Sing. A site mysstigaton showed teal ihe mound was. not homogeneous and if was difficult to def'ne raprasar.iativ soil parameters. In v,ew s>f this, conservative design parameters were derived from e bank analysis of ths awskng situation. in eenaidenng the stability of the whole scheme when fadings would he placed behind ibis darter dam, and then raised by the jp&iresm method, the position o* the phreatic surface, which was almost imaoss-bie to predict, was crucsai, a stability analysis was used to determine a maximum height position fcr a developing phreatic surface, end to measure fra a large ''ameer uf standcipo piscemotars weie installed. The impoundment was put into aeration and filled with tailings to the crest level ci the mesne, when tee first of the supplementary dykes was built above and upstream of tee crest and the levs! of iho failings continued to dee. Standpipe readings ware taken weakly and the phreatic surtaca remained comfortably low. But suddenly, between two of fee weekly readings, the euei came up by several metres. Tors mused the downstream slope of the mound to bsgm moving downstream wards the railway tne Secuse cf the usk of a sudden slide, the milway was dosed arte some people living nearby were evacuated Largs cracks appeared n the downsrsam slope as tee tea ennihued to move towards tee rarwev, as indicated by Fg 12. The mevamenl wes aramted by removing ihe ripper part of ihe suppiamentary dyke, loading the foe with 10 000 teones of reekfi and drawing water teem the moving J turn and from the teutons immediately upstream of it, T ie subsegment study fw eJrm a layer cf reck fragments vulMn the msund. Water horn ihe railrys hod mm,r eu Its level cf the ..pstresm eoge of this layer, pusmiffing the rapid usury of water isto thu ;,ucy of the mound P a l toms can arise when the Initial starter dam is not constructed te a s-Afteieni nmght 1 "e capacity that wfi be impounded by a starter dam of a given height must bo batomtod sgsinst the pradistec rate of tailings delivery to the new irrpuuncitser-t fe ensure that the expected rate o? n?& o- darn freight by tee method cf cense action ;ha! wit: he used, will enaute the storage capacity of tne impoundment to tec??taas at nr above lie expected rate of fallings delivery, I? showd be noted fra*, hecasme Ifie rate of rlelivery of suitable ratings for dam construction Pom a new nme cannot be mi ad upon tee ridel starUsr dam height snoted he made gmaler than might be expected .2,5 Unrmterdocy foundadorm 'Ibis sa allied So alto srwesfsgatten because tea weaknesses raveaied sy me dam feiluras should have been defected nunng the Site nvesnget'on. This does nat necessarily imply that ihe site investigation was naOecuate, but Ihe cam designer may net nave made tee correct assumptions Farr- tec cite sr.vesbgaifcm reports, Kan Torxaghi's biography {Goodman 1393} contains numerous sxampes af how he .in Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 38 of 145 ED 002061 00172724-00038 evaluate foundation problems foam a sfete-tetf m v J rm m g and gaamorphslsglsal standpoint in ways bw, previous engineers dad ovsdcoked, Examota, incident Mo 18?. Poor to the const* mtmm a' has dam the s..rfaeo teye-t; of clayey soli had not oeen stripped Id a -msol a? mat <fco r>i in * dam slid forwards, causing feiLre. Example. Incident No, 183, !>.& 8 m high tidings dam had heen butit on gently sloping ground on a day stratum about 8 m thick overi-prig s sltete/mydsSo-*5 bedrock, Is .mpoundrnont had been ftfsd ccmp:ete:y 8 years before .1 '"ala;! elsasiny a flow of i,y ,,.hied failings that traveled " 30 m, covering a main read to a .depth of 3 m. The failure v*a$ attributed to artesian water pressure tr. lbs bedrock developed by the seepage of maier from ether imooundments further up fee slope, combined with mr.aiie strains induced in tea may stratum ay e:d unsergro-nri mine workings. A l ag oi rakef welts was installed fo control Ihs ground water pressures n the area. fcxemnie, inci-Jort \o . 88. A t l-.y 6<i^=*!'? o u> rdnuun >~t \ dam sheared when '.he Parrs reached a height of 78 m. Th.s caused a 740 m Song sect on of '.he darn to S'omo. It was stahikseo by the use of reek drains and toe weighting. Example, incident Me 20?' Tfvs dem was Axmded on shout 50 m depth of material overlying >ava Hows. There a p p e a r to have boon a layer of weaker material ying over the lavs flows, and when the dam had reached a height of 25-30 rn, the nam sfd foiwsrds on this osep rayat. ?hfc earn was staoiiisec by draining the -ayer >nto axcavaisd funnels from ihs easing underground mine workings, and const-acting a rock butbsss at lira cam foe that would ant as ice weighting Example, incident No. 208 The .Aenaicditar takings dam ai the I.os Frames mine near Seville in Spain, bsg^n in 1878, faked in Aori- 1888 when it has reached a height or 27 m, A Ismgh of the earn. o f about 808 m swung forwards Ike a door, fanning 3 breach about AS m wise. The dam saefsem rsmaSnmg intact., mieasmg a* estmai.ee 5.5 x 10* m3 of acidic takings ftrat flooded over ao area of approximately 2.8 x 1c 4 haefares of farmland, lif e cam was founded on xsaor.it 4 m drcknass u- aflisvium, overfymy man wnicn may have contained ore-formed slip surfaces, developed during earlier geological conditions. The impoundment, about 2 km long end 1.2 km wide was along one side of me fia; ualey of the ever A g io . The tail.ngs lo the impoundment was parficuiar y heavy, with a sulk density of 28 kN/srd: Almost three times the weight of water, Fhe failure occurred where a dividing dam met the main slam. Ip 0895 some gmushg had dean earned out from lha mam -cam crest to mdune leakage 42 wwA wells were pieced fewnms i-~* sod of 153? along the downstream toe, through the diluvium and about M V i m into the mod and for several months they collected 1S00 m5/hrthat vms pumped deck, There were no eye w-tnass&s because fas:ure develcpec dunng tne night, but there was soma, evidence to suggest ihet the T ic ; dam "'ailed north of the divldincs danr, prior to the bodiy movement of the main dam adgmard to are; s-cuih of Ilia di'-edm-g dam, o-n a shear plane deep in the marl, as indicated by Fir.. 13. in addition to the p-hys.cn ',,umisjaas >d I'm breech, me river flow measuiemente .shewed (wo peaks, one ut -53.85 im .re w t a second at 08.30, indicating that failure occurred ip two Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 39 of 145 ED 002061 00172724-00039 stages. Subsequently plezonstfic heads i~- tn mH were found lo he above dan* crest, es indicates by =ig.13. Th<s may have hr bun to the high density uf tbs impounded iaii:ngs producing c o n s tru c t" trere pressures in '.he heavily overoonsoiidared mail that had migrated irenecnialy rewards the river end sores wtoornoato the dare. Deep boreholes heve oisefeseo an aquifer BO rr below sse dan, snowing a naaes of 80m, that wouto have restricted dremage bom the mare According to Eokssan and Adanrek iSOOCq too cause of the failure was a fault in the man 14 m below ground surface. Bodily movement o* the mad, ceoving with 4 ihe toted dam fewaote ibe river wo,.,id be asssted by the reduction of effective stresses on 1be honzontei feature caused by dm high pore pressure. Several eminent geotechnical engineers have axoresseii toe view that such behaviour wouto have beer, etommey dificaif to predict xerep;e- Peckdam This 78 re high aydreafe fill dare on a sand kwodatton >vr ytop weathered shale bsdmeh confetoing seams of bentonite, was in effect a tailings lagoon between two shoulders of coatser hydraulic fill, 1?. failed 'wo weeks attar it bed ;acnec tut height, on 22rd September 1938. producing a flow slide 8 reiifoo m5 of fiit and foundation semis moved ouf a maximum distance of 43U m in 3 minute? on a five! surface end 80 men were lost, .As w.-ih the .Aanaicoiiar tailings dsm at toe Los ."miles mine, incident No 309, a massive section of the dam swung ore upstream like a great earthen gate hinged on the east abutment The failure was addbuied to the fact dial the shea-iog msistorreo of the weatoemd shale anc bentonite seams was resoffieiem Co wkhstord Che shearing forces imposed by the spreading action of tire darn. Toss case rs give as an example because if has beer* exrensfvely storied and has become a siasstc. it nes bean described by Cesaqranda (1988, 19Ti p L&Cm m m WM u Q w tim J^ui The dangere 0f eirewtog the phreatic surface to move so far downsiicam ss to into read the downstream slope of a dare are very weii Known. Some of too easiest work duong Ifre 1930s of the United States Bureau of Reclamation tn instrumenting their oares was tor the purpose of finding toe pcs!'1of ihe phmafre surface. Tqey inslaf.pd standpipe sietmmdfers :n doreogeneeus dams as scon ss construction was eempieio an that fee dse of phreatic surface during reservoir impounding couid os monitored, n sores dares trey 'were surprised to find that wafer rose in the stand pipes before water oar: boon put in the reservoir. "Tvs was cue fa ccns-ruction pore pressures, crested by Ifre weight of stew iiii which compressed the lower dli and Pert op b pressure ;n the water trapped in tre pores of Hie soil, Thu rata of canstrection increased Ido weight taster than the pore water couid escepe fe rn the soli. At the and of canstrection, the continuing escape c( pres waier from tbs f!i :owereo the pore pressure, but the rise of water in the reservoir conto increase f again. Tbs same thing happens if- a treireys dam, except that usually the rate of donsfeaboo raises Ihe vetoes! height Soffreentiy slowly so Href correfreutien pure pressures can dssipa? and sporeoabie prossums seldom develop within in bam itself. Pore pressures are raised however hy the rising imooundmenf which weal x rises ef lire same rate as dam coosfecton; .& too dam is resed only to keep : freeboard distance above flip iovai of the rising impoundment. a norms: situation, w<r as Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 40 of 145 ED 002061 00172724-00040 ? dam hong bait by dm upstream method. !? indbafsd by Fig.14 By ma'ntateirg a wide beech, the pao. of vmibte water is kepi wets away from fee w gitudteai nxte and crest a'' tee ootn and them is i w s cpoofiusmy far am ceasee fractions treso tee fmimes by suite our uu ic whyd ss hacemm.; tee body *.1 the dam; any the Ossete fraction besug yarned irrto -ha awing pod, Tha mie af settlement depend -on sms of pest-eie, im spg'.fsc gi *vhy. ami its asKjwity: a* assdesmev1 oeo ha ootaired f:<rr Stcks's Lam In s rats of clearance, i the isme V die ten-tiesf part-eies in sn k cebw 'm- ssurtesr a tc -gave so ms stem wateg can ne an small teat a large Brae ot por.# s needed fa cetor fo ' the volume- af taking? being teach,arged into the impscsmdmete, anc a cempmrrMse has to ao nsacnac between tee area of tee surface o f dm p o 'd and he eias-mcss fn- the dam eras!, fdouhte con usssc vdsms poste 'evte m~es, -atumt.ng the hemm ami bnssgrsg the edge of tee ny-w-, venter eoaerLs lie dam ,$* Wteen m-n rnsma has ',-1 luises m r p dnwnshum-r! amps y-l Inn dam ten plrmsao ssrta<~e aosba-, dmanayoam m sha adwanpng pond c?o rea-h lb? 1agesf a4 therm g jie a , cscssng etear 1? msec hto r e base af tba g.^y " h o a * eteremtey -'osgeous ustuutien because tee msemg water locsd'S ana cussas awdv 'mitos te from tha dam teope, rnefobv teoepenteg r, io,,ukv usd? a r~ a f rotaliunui stp orem s odng-riy nor -aye a down miu ihu o uiy 1a he 001"ad ewau ce tea fine? <sf wafer wh-ci-. snysuasy;?, as Shr eboofsvn gop nr ,fr> da" ' s r o a fd uvsw L-rhe' hank butew hw pos.ilm' for ihn pbm dfy .rslaon bannvisiUi conl.nues fas 1<,h, ln\q, m.oya^mnd, larger and u \'R " r jIp1. <mm a" pn naobs, <m brgm m g the srabulv -~if ,he a,Loin yam s ^ l v am; Itm rh ( iv r g ) n n n vsad Ida Odori of a digh gbfnatsn n ,,rt"s;,p using ;renter Blip snrfacs as B S:rrgl.? iliuibat'Or 04 trm offad d*Bchpad abo^p Th?y o b e rto r a t d a facto- cl safety agamst Ibo occ,,-ffO"Co a? a 'datiem y ska fef, froin 3,b to enjy 1 1 tvban Iba ir,e a fo sf!arc ra,icfH,d me coeerntroam siege of tine1'tern t>!e ',,hmeua ^rfa'ie ;sn movis-y hao*. 1mm ibe sm,p io morose a?~bs ky by lbs nstallslmn of eonosnlai emed dm-os. 1ds Gadom-sa D v r o ?4 ,~f Ifghways has beers tss rtg such fm, oortyii ini-.s since t?3S, accordng t,? Smith and Stafford { ' %$?}, Tbay baited hsates ocas' me b-ass o?tbs siapa vvto a slgfsi upward sod nst-ors so that wains co Jd bow oct Oyg'avsty, Notes af SO to tSO mm teamsatar wore ddsiod Iho"- fdfad wsth pegomiskd n'-ets. pspas. in some casus fbo hoo rolapsad Lmorp the p-pi-s syus.-k: be nswoeb, Csifrenlly jtedyte PVC pss?os ase insjaled w tn v.hs aid of a Sioitev stem contim.oos 'l!;]hl asyguf, vrhsyh acta as a t'sssrg whits 1hu slotted dram pipes are inserted Ans-JOer sostemsi ,sses nvpnr-dabie f-steal bts on 75 mm hdipw etek rads, usog fiysn water Aster the c,ote te driiod, me pf-gsri pips is osarted arte t"o Osrfali hit O'opaoc Off so tnat ibo ddi: rods can oo remavec " ho optimum renpfh and spaoiog for fho cfosos to ;owor tee phrsafio stsdayo befoa.' iho te tem stsrfcoo bas heurs ycdo-vrs.riOd by essioy of af (1078) As a mmccla! monsum, ndobkysisl dm i"aso has barm snsta lc-;.i is- tea fo.'sr! J y<tirsjooc vodscg we is tVssysieni No 25's. ny'Jlse -rissa-batcsn of ivsaiaomaily bored sjuder slnamasye, e:tnm4ph mearly alrsvodve, "a s mA yet been app-md ex;e"'Ssveiy to tdiilngs name. Example Sncteersf Nos. 124 m e 135. The Bhtisfs Ctears vVaters Acts required coal rrssnes to coitect tho waste fsrses previously discharged bom their processing plants mlo stems. At ihe Ty McWf cohiery in South Wains agnorss were fortnec srs lbs or fedrsg dumps, of coarse oisuanj tr tng vaitey ante, without any inju des.gn nuusioerattems, "he Iasi ngs w;ss pumped op to diese iagoans in the exueemtion teat surohjs water v*ou.d n m ? mto te coarse drscsffl The bownslope bank of she first of these lacones Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 41 of 145 ED 002061 00172724-00041 ruptured <n Deeemser 18131 srnt the refeassd slow damaged so overhead ropeway that earned tr>r* coarse discard to the mountainside dps. A second lagoon, hi.ift in She same way, failed in March 1385, rafeasteg a greater voter of fallings thei rearmed the collier/ yard, damaging cars a te ateest going dewr; the snail. These Incidents are ilastetee by Fig. 1b, E s ^ s J g . Hcicenf No, s84. A IS rr h.gh sailings dam m Hr /iu h w o ad m oo in Yugoslavia feteo in March 1978 dua So a high phreatic uranc ruaJanu t* slung downstream slops of I on To, Prior ;q failure there ware sgns -<f i-.a^.-ge nyuuq Torn ioe slope quite nigh up. The flow of released tailings c.mmmineHd foe nssrhv Over a te the water supoiy from this over In She '.own ef Son nod ?n (m disced ns,si tor more than 24 hoars, Eseoiole, IncSdsol No,?, Bafckeng. 1874. 8 million m3 of kq,,effed Sailings escaped and have led 4*> km, The How d e s tro y s mine buildings, some w*t down the shaft carrying w th it lha saga and killing 12 miners. The case has bean described by Jennings {T3?9). Examofe hefoent No.25 C aste Dome, USA, 1980 Sand dyke failed due fc bxces5>ve seepage end high parpens conditions. Pumped vedlcei weiig were used to drain te i sand and reduce the tesghf of me pnmtee. surface. liiroii uio incident No. 202. MaroesprJt. Virginw, South Africa. This ,li w hem laiinps darn fieri been constructed just up slope of the township of Ivfemesprait dampness nrs the downstraarri slops and some small s'ips had caused five impoundment to da ciosao. 4 continued to he used tor the occasional discharge of waste water containing name tailings. Ttes confirmed for seme time, the eAtre teitegs smwfy peeling the pond further rnwarns fne dam and reducing He freeboard. The movement of He pood was recorded fey satellite imagery fby chance a satellite passed over the she on & regular oasis; and if was seen fla t the d e c a l become isolated so that no further cssehsrge c.obd corns from the pond, A te rsto m i when SO to So mrr fell m A tear was the last straw sn.l the dam H ied rtunnq the waning of 2 '/'* February 1904. A description of line failure was given by 8 light fT90?bt. Tvampie inmriorH Mm 313 Femurwsrmo faJcgs dam, Brawl ~bis 43 m Ngh dorrHiiud very suddenly. Toe fasLrp was oldn,ad an b a very steep downstream slope o ' 1 on I," I co nP.r ud web Mgb pure moyswes mlbm He cam, , hw cuss m emotes so,. onq' "8,2 7. Hew tedes" below, Sarr.g|fe. Inciter .5 Mo, 2*4. Mineral Sana Grande tailings darn, Bia*i.. The impoundment was formed n e nefumi valley 3 km from the proceeding plant, retained fey the dam constructed bom cyconed tailings. Construction began in 1989. and the downstream slope cf Efeo faIHgs dam suffems a major sip on 28te Fosnisry 1984, The slip did net sever the dam ciesf so Here was no .'tease e f la,lings, but file mining operation was suspended unit! the safety and wfeghfy of the dan was re-establishsd. Emergercy repairs took 3 weeks, iesuTnp in a revenue inss equivalent to 880(1 nxs of gold. The fei ore was aodbutgc tc a risa of spa phfppgc surface caused by badly constructed and ineffective filter (Asms under iho stader dam, exacerbated by h e a v y ravdai durng safe '3 9 3 and eady 1934 Tne 27-n bigli starter darn had been mace 4CI Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 42 of 145 ED 002061 00172724-00042 impervious Brough being constnjctsd from I which, in an attempt tc construct a stamp dar-, had ears well compsuted Mistakenly to tnwing te practice iis^ i *r w?tei ring f1ar.fi, a grout curtate neu N-en constructed under foes sterter dam, preventing drainage of pore water Ccnfttehfoiy fa c to r ware test tee design and operating nanuato dad cot beer developed eo that there was no amm or iong tear strategy Operating staff were inexperienced in me adopted method o ' dam construction and thus were unabte to imemret the warning signs that worn balrg given by the piezometer readings, initial construction was supposed to he by downstream cyctamng morn toe crest of ids darter dam, unfortunately fas cyclones did not amve aniii 5 months attar opareiions began and meanwhile tastings bed boars dist.ha:ged freely into dm impoundment and due f.o operator inexperience, fmoooard was rapidly lost, causteg the starter dam to o<& raised by 3 m n July 1901. The meteatf of deposition was changed to the upstream method in September 1991 thereby sstoong hsefcaa-d. Du^ng 1993 tee outw atf apses farce o? the tailings dam looker reasonably healthy, aside bom -ji& common problem of loo moth water in tbs pool. There was min,mum seepage from the downstream siopa, aw minimum seepage from the fila r drains, which should have ueen discharging freely. The rising p'-reafe. surface rose above tre meat leva! o f to impervious stader dam amt then exited from the slope above it, resulting m the large slip. Example; Incident Nm51, Groofvtoi gold mine. South Alcoa 18513 Gownstnaar sioae fa-lure occurred ader a orotongad pened o i msn, when the pond spread over the tailings beach and encroached on me cam crest The dam bmattead releasing a ftowslkle of tarings that carried sway about a third of tee impoundment contents. Exams So: incident Ro.S2. Kennecoh ocgper mine, USA, 1941, Reteiall was tr-ought to have increased the saturation of the downstream slope, ceasing miner rotational slips wnioh iuitisteo breaching and released tailings from the impeunomeni. Exampte: leaden; No, 100. Ray nonpar mica, USA, \Wi2.. 52 m high cam. Stops instability over a i SO m length of the dam was `.bought to have bean assocatee with s perched water labio above c layer of simes of tew permeability depesiied on the dam 20 years eahieo A wetted zone bed beer, observed or: the downstream slops tor some time before a rotational skp occurred, leading tc a breach Released tailings covered a season o f an-adjacent rssiway, SlMbMte madem Mo t8e, Amturus is: Sings :mpounsroa~-i Zimbabwe. Ih s rectangular mpouoomeni , 310 x ISO m serving a gold m:ne and in operator, wss retained by dams that sad seen boM 'ey tee upstream method from the coarse fr-ciio r of the tailings obtained by the usual beach separation. It bae bob'"' built over s very* sight hdge that ran oncer the oog direction on the east side so that the sand sloped at about t on ;0 lowards the west side, causing base drainage fa t'sow to the dam fnrm,ng that Side, Thera a;;,peered to he no u"dsr<tis:nsgg layer, th e downstream slopes were 1 on I 3 io I on 1,1 (vert on her}. There were twe decant towers each 448 mm diameier, on the central axis of the impoondmer,; and about 102 m apod, vVth the sudeoe of the tailings impoundment stopmg uniformly lowards mem with a fsSI o? about 1,5 m team tne beach. $<x years prior to the failure a large ameate scar 80 rn wide, 1,5 so across and 10 m oeep. termed in toe slope of thg west dam at about met length, suggesting the beginning of a rotations: slip, it was stshiised with 1040 sonso rock waste. A weak befow. failure, cevkiss developer m t~e west dam and were Plied w:tb waste rech. Thare was evidence: that the surface of tee impoundment was 4! Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 43 of 145 ED 002061 00172724-00043 beginning tc slope towards the west side a*~-d to seep pond water sway from the earn 'f o ,, t *e n a < ' bcfoo foil rr ~ o,v 1* 00 w r - -< N f o n i i f i r i- r * '7 m " oa <i f e west earn crest, Delivery p-pes were proved to erebie spigoting from the bond. During these last four days, following 5 ouf-oe ef heavy rgir, a83 mm e? rain !'ef and was trapped between the dam crest a m the new eund. Sin* holes developed sn tr.is 17 m wide step. Af 19.30 on 31* January 1378 with a rapuded toad hang, the west earn taped where the ace' cad formed ssx years esrfiar, releasing a how silds teat formed a hmacn 68 m wide In the dsns Boreholes out down through the 2S m height of toe -mpouximerk feet upstream ct the dam rev-salad takings 16 to 28 ro deep w:in aoouf 7l)% s it and E% clay, at a va>ds ratio of 0-96 to 1.05. Attempts had aeon mace 1 improve drainage by having steel pipes Into the dam eunng the two or deem years before foe foifore It is oosslbio that as a femsdfo* measure provision of hcrieonsaily homd drains through the tee of tog dam anc ini the bottom of the impounded tailings might have w /e re d the phreatic sudc sublcfe-t y to have prevented the hrm efion * it forge refahonai slip. Farther details of th,s even; have bean given oy Shakeshy arvf Whitlow (19171), n general, proventative mcasums. consist of proper Isiinas wafer maagem8nt. Remedial raeasuras mcJude reducing the water level in the impoundment. piecing Pea draining, coarse matenai as tea weighting over tee iowsr pad of the downstream slope, and -improving pramage. This nas heen co re -n jama oases by Installing horteomai drains mo the fug r the slope. Advice on drainage vs given by ICOID Bujfslin N; h f, Dugi ai demon 5my have included ers:nage ana drains o^ venous kinds may have been cuiif site fo r can* foxfo during cansfmdlon. Choking or other malfunction of those dm,ns con --'eneosfo ailed the :r ;D fm of the phmaiic surface, and cduld pnoangtr siosilfy Boam ge con he caused by inadepuata filters around tne drains, allowing i r e m in u s to get, mm fisc drain. Drams that exit to foe atmosphere and cony re cm Gy small fo'ws mm nte-w crem.ca: njudaticn of the draining fluids, producing solid precipitates that can slowly Plonk the drains with a wsl. cemented sard materia, that cannot lm cleaned awsy by surging. To avoic oxidation a drain can ha kept fell of water by planing 0 snal. we.r at ts outlet, raising foe water isvel around fha dram by a small amount: insiiliciem tc affect the draining function of too drain. Jogoncm flp ? o j narnoo r a t lack of damage is tne main cause <J 'oifoms anc ru g , n-e t.m si eaecl.e', SCOLD BJfoiin 97 ce-neiudss. Careful and c ir 'v d d o r , ,,nnstwofkin S ure the ~*i * stages f data ccnstrucfccn cece'ttulus a <.h-a.ns. r,wim against m ure 'wpsus-ve remedial work'. Corsiderat-ori of foe (ylfnsra B e rn Grande tailings dam failure conceded that e tafones dam must ae mces-nlsed as a sensitive structure mvoiving high risk to life, he unwrunsrsenf, property arid profitability of the company phs failure 'g&uii.ed in a revenue loss ecuivglen; to 9500 ovs of grid). Consequent^, tailings Ossposa must he subjected to the aapropnate lev.* of design, rr,anagMnent and suaenesien Ip relation to the riskr, SpoGncpily, the design should bo inclusive rfo foe conceptual and feasibility dafaii. construction and operating procedure and closure aspects. No chase can pe dene is isolation of fee others anc ecoifouity one responsibility most he ma:nl.a;nad through the entire process, me operating procedures manual is `.he vital Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 44 of 145 ED 002061 00172724-00044 fek Sparwaan design ana operation and mus! be cinBiaid togsih;- with the necessary pfMtperattofiai pfog'ems for cse-af-ng ae-soonei. IncJdem No,34. Cyprus Thompson Creah, USA. i 8,, An original drain inciuced a 15 cm diarr.etm a VC pspe vwBoped * filter clot?-. ch e teTing* r e seen to be being discharged from toe drain, and a smkhcie c l 2.5 rn diameter and 1,2 ns depih developed in Ida downstream sispe, it was sssumed that tbs fitter efeth protection bad tailed, altcwing piping into the drain. j <o~iptr in.-! (wf K'fi ib4. Gypsum tattings impoundment, USA, 1968, Dem h t,an en - r b - o' ng M the under-drains. I -at a ttvj .< a m Include careful drain and filter material design, statng of 1. a..d t 1-- w i amguate factors of safety, and proper water managsmddt di t :t i- n vt.u s Lack a? stats:ity can also ba oaussd by a variety of condificns in addsHcn to Loose of the phreatic Surface reaching the oownstream slope, as described above; //hob <$ perhaps the most common cause of instability that can teed to dem faiture. Excessive height at s give slope angle, exeapbaiee ey gullying and high ro.nfpii. can cause teas: slope faEres which if mpaired In mno, msec not Wad to dam 'aitfjre in too sense of the fom-ason of a breech. Toe emsisn caus&s loca* steepening and can rasp ? so iocal rotational slips. Freezing of ttm downstream slope can prevent evaporation Tom the slope and so incmasa pore pressures witter. Ere body of tire darn, l-rdnngeo pressing can eiso cause ice Senses to form, drawing pore water towsuis the surtace of the slope. During fnaw h e raieasec /rater can initiete siooe instabWy. The following examples relate-to toe erosion. Example. Lead and wnc mine at Mgjxovac fW rtenegro, PUd: Tailings retained oy a ?.Q m high embankment darn built alongside the fare river, a tributary of tire Orin.a which in turn joins tire Danube, lh a dam of fiii consisting of a stay with send and gravel had beer* covered on the upsiraam side by plastic sheeting to prevent water from the tailings bom polluting tbs river. Roods eased over ieve: 3 m. bringing d to the dam toe wham sufficinot erosion oecs.srred to cause s rot3boai slip the! reduced the 3 rn wide emst to only 1 m The pastic stsoetmg prevented water frem the impoundment frem en.erm, 'ha f1>[ and the dam did not breach. Remedial worh consisted , / riwe 'log tier n/v; to a course awary from the dam toe, ami rebuilding t.hs downstream x voider 1c fa tar slope Ssamcio. ,n; dent Nc.'jh. Pinchi Lake British. Columbia, 1871. A 13 m Hgi* dm m" homogeneous section baft of compacted glama: bis. W ater oeosntod ham the impoundment flowed in an eniinad channel paraitei with* the oownstreem lee Erosion of the channel produced downcuft.ng of 4 m, reusing cracking arte deformation of the downstream slope of die dam, Movements wens seated within the laeustrtna tnondat-o" sediments at the death of the eroded channel Movements were stabilised by construct on of a tea we-ghtmg berm anc retocaticn of the channel. Sierra Club v. EPA 18cv3472 NDCA 43 Tier 10 Attachment E Page 45 of 145 ED 002061 00172724-00045 8 2.8 Superim posed Iceos l oaris nan or oddad to M w mfafninrj failings by morsasnq the hght & foe daw, refoH -g m s * tie slope angle, and by adding mstsnsis to the surface or the laUngs impaundmem. Eitameie, moldc-nt Nc.72. Lower tndfon Creak lead mire. USA, 19B0. Earthh'i dam built >n 1953 to a he'ght o? 1A rr and subsequent!/ raised several times by the adeiticu of earth. !n " 808 sfompmg occurred in the 1 on 2 dcrwesiream stages. The dam was saved by toe addition of rocMiii toe weighi ng, oteced with a r outer slope of 1 on 3, The dam remained In service and was raised between 'd ? t to id 86 with Cyoiened sand fill. ultimately reach ng a oe:ght ni 25.3 m Emmole, incident No.?5> Maggie Pye cnsna clay. UK, 53?0. Dam 58 m sign coffered slope M u re immediately after completion of a dyke to raise the dam, follows a pgraod nf heavy rain. High pore psassures, together with the added weigh; or' itra new till, were though; to be the senses for the iaiiura. 15 000 md of tailings ware released, t <amcle re riant No 208. " a tom of Mentis Minion Corporation's, n.fng Pond Ko d ^ml'pcsnes Fai:ed info sea. extending 230 m seaweeds, si 09.30 on 2nd Sept iLfel, about 39 083 cubta metres of materia* was -eteasad. 1? people were working o~ t v uf t*v t-rau, and a farmer veto his wife were walking along tne shorn, Of these V wme Mfied, including fofoCs Environmental inspeptnr, Nelson Gayamo, vr'eae da.ly mepectien reports of the .mpoundrnents indicated no signs of failure. The tenner was ksi.ed dot h;s w fe wee saved, to ts of heavy plant met too Darn was built iSdcfo by tne shoreline of acer Bay. On 21st Oec 1988. Typhoon .Among washed away a portion o* the dam at tha seafeenl. Another collapse occurred on 9 th July 538?, both inpioents nfosassng efffoe-nt with high levels ot cyanide resulting in ffehfoll The mpcmndment had been Sited to capac ty oy duty 199-5, when cam crest was 1? m amove sea ?evel. The crest eras about 10 m wide end was used as a two way rued for heavy plant., '"he dosed Impaun1ms> i b<,, an nm <g rsej as a dump An trine waste rook, end at collapse contained mom -hn a ~ni *rm cu~ir metres of mine waste, earth, boulders, rock end teach pari tteh s pi > -ww-m in ,v!raal irucke, 3?' dump trucss, 3 tfosers. 1 wetter and a :and en.Jeer (rar-ymg tne inspector). Fatkm was thought to be dee to h:gh rainfall raising the phreatic level, hut the tee at tbe dam was over reclaimed long, qnq the breached portion coincides with the former shoreline. $.2.6 Proteen,- w ith cccaets Water pended i~ a tmiirgs mpeuirtemert :s removed by evnporaocn p erpm g feo"TM a Posting barge, nr decanting into a tower that easts toe .mgeundmeni through a colvert or oipe beneath foe tellings hem Quo of tne most common causes of u:' intended oantgrous rises of ponu water levels is nedequeto behaviour o?decants. This may be produced by debus blockage, oarahino anchor fracture of the outlet nassstg under ihe dam, or by unanticipated flood. 3 omme fe eeoont towers caused by ce erg discussed in Scot,on 0.2.9 below. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 46 of 145 ED 002061 00172724-00046 Esamsie. nc^er: No.23 Cssaqaita Pe~; iaiings daws b ill t*y upstr&am mabod, up so I0?m high *<$&v a oo-npie* array of pps ty;o depart structures and nadaquafoty stoed stream bypass charrtcis, Rvs sepuia.o Pam failures suited from failures a these systems. Examata. irtoident No. 16, Blackbird, USA. Cobah wifi Metal reived under the dam corroded and partially carslapsed Suspended Sailings dtouhaymt -ro downstream drainage Mo embankment braacn. Example, fecibenS No.48. ffeTena sivpr mins, USA, 1974. Throe failings impoundments dad been built in sequence wkbm a narrow vgftey. Daring a ram an snow event that caused a "DO year flaoc, a btockage diverts a latge portion of the fiend into the jpoorrriyst impoundment. Sts decant oeufei -not accept this arge flow, ceasing tbs unpsr dam to fa! by overtopping, leaning to a cascade failure of the clears Menmmd t-iln ga cohered about 5 acres of land, richtag part rP a highway end mein rirw mkwey Example (rodent No 1 9, Sweeney, USA, 1880, Tbs darn was breached das to dip ng emend vhn decant nutlet conduit Examaie. Incident Ma.1'7 . Stave, Italy, 1886 Two failings dams were nog tor a laortto mine ir tie mountains of northern Itaw. ""hoy wem nni'S pne above the other on Sloping ground farmed by fiuvks gaefel sediments, ushg stomar bams wild ecnstructksr; at Surer stages by the upstream meffioc. The iartngs conSoined sufficient coerse, snguis? sand 1 enable tfie dysvnstream slope to ftp built at an inclination of 1 sm 1 2 Special drainage for natural runoff el fee ate was nu! prevxled, Concrete pipes were aid on the ground fc be under the lower impoundment, encased in concrete 0 form a square ascVon, Upward facing o tm ng$ were mace :n each length of pipe to act as decants her takings wafer, and as the neighs of lbs impounded tailings mss. cne by oo these opening were dosed by concrete plugs, Whe-t the first dam reaches a might of 2d m 3 second darn teas begun upstream of the first impoundment, with the starter darn founded cn natural ground at the limit of the existing imeeundmeek Similar encased concrete p;pas w w aid undsr the footprint for the starter dam, and continued up the slope io act as decants 'or lbs second .mpoundmeni 3 J whan the sseona impaunc-menf pad reaebed a certain level, a b oskage ext-urrac in the oecant con-crate pipe. The blockeo length was by-passed with a steel pipe laid cm ice surface of the tailings ang conneoteo fa the concrete pbe tbraagb a smug vadka' tower, as isrjicated by we 18. WPcm me second dam seacfied a nelght 0?23 m it suffered a 'cfaffonai slip and broached, Tbs released failings produced the failure of the lower earn. Tea combined contents of tha two impoundments bowed at speeds up to dfi km,`hour sweepmg away the allege of Slava with its several hotels and engulfed part o?toe cmal town of losers, about 9km downstream 269 people were kilted. Six months prior iq Sms fafiaro in July 1985 a srrol Sfp ffed occurred in the lower portion of ms upper darr- in the arcs where die decant pipe passed underneath, as a consegaanos of freezing, and wafer was observed to seep from the ares ar?;i March, in ,,u.~e a large w~i w ,e i 9 <tt! ,1 pi the irswar impGanomeni due io faster o ' tc-a decani pips and tailings sumy from iba sink bole f-owed nu; to the fiver Slava Water levels m both .mpeundrnents were towered so k e f repave coutd be carried out. Only four cays before the fetal failure, both ponds nab been m ille d if to ihougnt that the length of atom pipe sagged under the weight a? the a cting tailings and puled oat from 45 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 47 of 145 ED 002061 00172724-00047 ih v^cicat gfcorl concrets psrmlifTg 'he r'^r.snted water to rfescharge into the body of the lower pad of the upper dem da resulting rise of pore pressure caused the rotation} she and the faB ra ru c h e r hem ip of fois case are giver; by B ed at a: tlS8S}, Chandler f 1 B 1 | ard Chandlm & TusoU P B S ). # J J Flow slide Fai'ure o! e tarings earn itsatf, white causing an sncnnverrenna may net hove seriously damaging nonssgyences nor cause any toss of Site. Ths serious danger of e trench is the- possBihy of e subsequent flow stisa of imusfec failings. Toe stasity of smbenkmeoB egainst sips is controlled by the available shear strength of the fill end foundations. The shear strength of particulate materia-s is usually expressed drrp:y and, for the present purpose. quite adequately by jhe Moiir-Ccsuiomh relationship to terms of effective stress: B w c B ' fa n ' where - .* O* are the shear efreogfh and normst effective stress respectively on a fa tyre surface t- the material. and o' and 'S am the effective rahasion and effective angle o' shsnnng resistance ef the; pamw.Safe mstedai. The above eouaiiao cun also Pa exynessen as' p t f t {c - y)fan 0 s whch demnnsmoos r a r as t c pom pmasum u increases, the avaiafcie shearing ' cvusmnuK "uoreaste pfordud s < Iota st<-'-s<, puss not change The pore pressure Is slleo expressed as a dimensionless redo fry,) dadoed m p , u / z where * is few huk unit w m jh! ot the material feoti or ic in g s ) and z is the depth of the coosidoevi pi -sunn below tsi cr ground surface, A granular soil in a danse stale vwj generally exHbH n greats1' maximum m peak affective stress shew strength (d tp than fh. name s o l n a feose eendlon, although f i s effect is suppressed at iarqe normal stresses When the danse grans a- sett is s h a re s beyond the peas strength, there wH ee s fett in strength to the constant volume or criiical stmo sfwngth (cf-vt. This constant voter strength in eind'ur tu the mmcmnm terengfe of dm nod T a moss oond.fioo where idle or no post-maximum fail n vt <s,gt m I Uw.ii B s granular sot cV- should DO similar ta the ar,g:a of reposts. am ,t 'e m in r rewrw, rto'ieo (18E8) found that for sends o , , ranged h e r ,,in- to 37"u ip a truly yndralned condition e saturated granular materia w-lth particles in the sand and s it grain sixes i,e. malaria! typical of tailings, aenaues as a D 8 material. 4P Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 48 of 145 ED 002061 00172724-00048 " d s wos ctemfensUateil by Bishop m z SicJte {*360} and PgnmBn (19S3) Wner: $nanng strains 8- aopiied such maternal can citate cr contract, dapatng on ite density. This means fhai ss shear strains occuf the ungraded strength s i tha sai,, raion m ate'ai oso Sa respectively trgher of much lower then its drained shear strength. With contractive scatena; van a email shed can lugger flow l.qnafadion tbs sheanng strema irnocsad <r a saturated taiiings impoundment caused rsy deformations of Ine rotaimng dam can reacMy result in a How slide composed el' liquified teifngs. This material has the fluidify of wafer bat fa very much heavier flaking its destructive capacity sarge.. Very loose, noirnaliy consolidated saturated materia! as are takings in an impoundment, exhibit a peel*, strength higher than she residua' strength at greeter strains, when tested n apparatus using strain control. This affaci s shown- mere vivfc'iy re stress no am ine test*, i r it'1'* n v`~>c iho shreemg rer n is ,re fy v , by weights' an example given by Castro (tgS9> fa $fepwn by Fig. 17 The tests vrere made on e fins oufeorm sand with s D,y size of C.1 mm si e relativa density of 29SA using a confining pressure of 40C khbrrfy Load wee applied in smalt increments end peek dev are1 stress was reached in is, minutes at a stesiti cf 1%. during which lime the fave .wetia re increases so hsif fee confining pressure, Sul once the peak strength ha J ,-esn i sauced ins strain increased io 19% in i d 7 seconds. The poro eressero i it ntreJ to simest fire value of toe confining pressino erst as a conseouence lire s' renash ml; so almost ~olbr>g. ib is e the mechanism of a finw slide. Bishop (1972) described tests simulating ina conditions in a tailings impoundment whan yield of fee retaining dare {duces ffy while 0- remains constant Although fee average efeoutlvs odneipaf stress decreased, so did the volume sob he polmert out that inis behaviour gave a warmng of the probability o ' ine flew side phenomena. Blight (1997a) described the failures of five failings dams in southern Africa, Safokeng. Arc,teres, Sauipiaas. Vtem osprjf, and Simmergo. w shows that tne occurrence of a mudflow is ciosoiy associates w,tn the ccndifion of tne greens on to wfesoh the escaping tailings move. I the ground surface is dry, it is liire-y that the takings w;ii eoi reove far whereas if i is wet, e liowsisdii is much more jiksiy to ensue. Examples, These are lumercuS and resell item tfeimre of the retaining talregs dam that nrey be caused by inadequate shear strength or the additional loading created fey earthquake shock. They inceda Ssfokeng hoo.dent No. At Barefeens (incinent Me,9); Slbse (incident r^o. 15]; the Ei Cobra cams (Incidents Nos,43 & 4S); Kimfesdey incider! Ido -So) fvteehikosbi Tnoideris No 84 fy 85); Biava [ioeicent 'v> i I feterresprust [Incident No.202); lyw y find-sen! Nu<?3); Femsndin.ho incident Me ?i ;tj i j . t Earthquake1 Gama guilt, by the upstream method are oamcJarfy susceptible i.o damage by sarthouake shaking Tne'S a genera; suggestion that fens method of cunstruobor. sho-.dd not be used in areas where there is risk of esrihquaxs. Dams busii by lbs downstream method, in cases where dere are s.,tfictent voiurees ef the coarser fraction in the takings or those built from sorrowed clayey ffl es water retaining dams, aid much less prone to darrego by eafebcoaks shaking. Seed (19791 sdd fe-at o was Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 49 of 145 ED 002061 00172724-00049 noteworthy that no failures have been reposed in dams butil of clayey sorts avan .-rider the strongest earth-snake shaking conditions innsgrsable, and that ail eases o" slope fteiure reported nave nvoived ssody soils. Advice cn sanhcwsire resistant oessgn cf tarings dame is give't by iC Q lD 8 u lertn No 58. Sxsmore. tncidem No.9. 8amhonq, CWte, 1328, 81 m hig dam bo8f by Sts upssream method a,iih downstream slopes of 1 on 8 i'he dam faiisd during lie Taica earth:oak of magnitude 8 3, prax using a bread's 48 m -olds. The released ladings flowed down fhs valley, hr i;ny fte people. Dmmn'e :no dent No 12. Bmfavreta Chi'e, 1385. A 20 re sign cam built by the cpstreare method with downstream sfope of i son 84, foiled during the La Ugua earthquake of 2 d magivtudo. -At tun time only 8 m separated the edge of me pond mates from 1 <e s-ait crest Exams; inoaant No.57. Hokkaido, Japan "388, A i S m r x r J~*n b< cm upstream method w.tb a 1 on 5 downstream slops, faked during the Tokscte-Gki earthquake of 7,8 magnitude 90 080 m" ratings lowed from the breach, crossing and clocking a Over near the downstream toe Exomole. incident Mo.$4, teach,ikcshi No.1, reman, 1878. A 28 m Ngh dam built oy toe uostream mstnoc with a downsrre&m sicpe cf 1 on ft, teire-i dunne the fgu-CshirnB-Kinkai arthcuak of 7.C magnitude. 8 000 m1 of usings were released and reached ansi flowed down a over vaiiay for 7 io 8 kst>, causing one falsity. Hreventoisve mnosrees fan msodened above! ine:ude dem 'nn-t t,;1 g r with nohosAa mafsnas, preres'Ors for venter dreimigd io the dam. an,, pmpvre wetre rra^ag em en t 6,2 8 1st and faulty water feaianae Sufficient iresboete under ail circiimstanc.es ane sr{ aieng a tailings cam s one of tee most important prerequisites fersetety. Tailings earns are ertre-meiy sensitive to high levels q* the pnreaiic surface that can cause smell slips reading to cyeriopping, feiiings dams b u ll by the upstream mstnoe require a dry beach of caaise iaiiinga solids have fee pond aiar level upstream uf fit dare crust "he beach, must never he flooded with wster cttverwiss dsngemns seepage cond-l-ons can develop. This calls for a sound water balance of the fsii.nga disposal system micno into account aii the eocnponents of inflow under the varying conditions of operation snd the climatic cond-hons re tbev seasonal variations. Extrema situations with low frequency of re occurrence oaec else to be checked, m pasts cf the wood suojeeted to long periods of frost, failures have ocnjrred.se an r-diiOiX result el .'rearer y tr>3AT,k> incident \ o .88 Kimberley iron nans, Br-treh Cclumbis, 1948 S-ope fas rev Gocjnad during 3 period of high snowmelt and spring runoff that rpisea the puiiretie smtecu white the surface of the slope was frozen. A large teiings flowslide if; vi'!u:,<. 11 -,nd frozen breesa of material were seen io the Itewing mess. 4H Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 50 of 145 ED 002061 00172724-00050 oMass ar given by Lasagmrsdvi era* Valvar {1S71| of exfsessve si- u g h rg o dnwrsfnw;m slope eitr:nir.ee m fmea-ng nml growth of ice lenses, ,'> <ompun eel by h e daue'ooment c? pyung dun.~g ihy first %w days of e staring haw . Example, Incident Ne,22f. Bala blare, Romania, A new impoundment about 1 km w.ds sne 1.5 km long was began on relatively flat land mot resa 7 m uoTsnefy ova- its isftytn. An o-dar pjrtmeter dank :> m nigh was U-Jit from ofc failings taker, from a disused deposit, frreies litis persrnaler, a starter dam was built from tbs same matenal, m general about 1 rr high, bat wgher on the row side o* the mpoundmenf, When fairings name from the processing plant l? was put through cyclones on the emst to bdid by h e downstream method to h e perimeter bond, ween former ccnsxisefian wauid use the ucsdepm method. Three Old d-suxed impoundments ware to be re-worted dy cutting rdu them wr,h water jets, to extract remaining gold and silver. The resultarst slurry srs punmed to a new prncessing plant ano [he processed Sailings, containing high concentre? ons c,i cyanide {total approx. 40u m g.i bee abac? 200 hiig/l], pumpee a further 6 to km tclho new mpcundin,'t. Decanted wain? was pumped back tn the old rnpofindmenfa to ptovir.e h e wader isle, wish h e asm of mm-eng a hosed system w tr no discharge into the environment During tbo first summer, construction of the cam eteng the low slue of 1bo impoundment a ' d partly up the ong odes, progressed welt and an ample f?es.fwnui was rnairdsir-ed. Evaporation from h e disused and .law impuenonents asoeer.ed gi'ecihtaflon, bet tots situation changed whan -meter set in and lire v o L u '4 CfCUlHting water in;;.ieased. When the tampemlura %il bainw freezing., was no iongepossible to operate h e cyclones and the whole ladings was d-soharged h ie the impoundment, whtcr became covered oy -ce, in turn covered by the precipitation In the form of anew. On the hat coy o? January 2000, a change o? wind direction brought reave rain and -e sudden ine-resso of temperature to above freezing. Water liberated from the ice sod sco-w, soppiemeoteij by the amfatf raised the water level in the 'mpoundme-'t until I overflowed, part way up one of the long sides hare darn eoosfrucficrg was cufie tow, cutting a breach 20 to 2b mwfds permitting a spill cl shoo; 100.000 mJ of heavily conterntnafed water. Decani towers so regions subject to .ong periods of host, unequal loe thrust against a decant tower can generate excessive movements in too tower stem p; at fine siarr to case e rrisef, t.owe-eg t-,e water level oeiovv h e tee can ge-mrsfe large moments in tbs tower sachan and wind plus wave forces aerees ar. Irregular ice flow can generate tursin forces su lla em to shear of* tbo fewer stem. Ls-ge releases of water caused by tower failure podar these conditions have on occasion transcoded signlficam. volumes o? tarings away from the impoundment, fbpny of hese difficulties ,,an be overcome by ecatrtg the tower with rigid e;osed-eesf foam panels fixed sroursd f o a - 2olor ot the towiW to prevent tfio fusmotion of bond between lbs ice ami the r> -ver S J,f8 Impeundrnents not m om eo by e dam Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 51 of 145 ED 002061 00172724-00051 a). Tailing*; discharged into a worked out pit cr other depression can he expected to have no prosier bute oonsSy than teose pet into a traditions! impoundment; it anything slightly less cause there may oe no special provision for drainage for he pros water te the tailings. Because of this they are just us s>.seplsbi to Siquslacito gno, should the upportunity arise, wifi rapidly escape trough any opening, Even water; wtesn rsadvertertey stored than allowed to escape suddenly can cause Rouble Example. A quarry <n Scoflond dmined through s funne: !nto e catchment arse shove sn & a ^ l ` dam. During a stem in 1925 the funnel chored with c-ebris end the quany filled with wafer. The increasing pressure of water eventually forced through the debris dockage releasing 3 forge volume of water Info the water reservoir. TRs flood ova,Topped the dan;, causing a Breach which released. In addition to fhe contents of the quacy. fhe contorts of the reservoir; that ftewsci into ihe town of Skerrteraly tillin g 5 people This accdenf In 1822 contributed to toe te'mafion of the Britten Reservoirs (Safety Provisions} Act of 930, Example, fvrina ceilings ham the Sen Antonio are deposit have, since 1993, been pet Into an o:d apse cut mine site tTapipo vre taserva) known as the Tapten Pit A drainage funnel tending from tors pit was sealed whh a concrete slug poor fa placing fhe taltegs, so as to make the eld pit into 2 watertight basin. The mine railings were 2 tins material about note by weigh: of lass than 63 micron size and 36% less than 200 microns, fhe tarings ware deposited at 3 consistency of 70/30*4 sotels/iiguid. end about 29 ''te k n cubic metros had been placed by earty 1988, On 24m tearcb 1999, targe quantities c f tellings began asesping teen the drainage tonne into the fvtekJspnt ene Basse Rivera, Dun eg the iakowtec 4 to 5 cays, approximately 2,4 million tons o* takings were nyjessed Subsequently the Tow o? tarings irom fbe tunnel was reoueal bet during tec folicwsrg 6 weeks, foe taint weight lost was app'Otemateiy 3 msUon tens, Toe rdakuiapnst end Boac Rivera below' the relied d: smugs tunnel were reported to nave bees savera.y affected. with the teiiiugs resob ng 3s tar as the constat area 3d|aeen| to the mouth of tee Bono River As w e l ns the risers being degraded as n result of smothering by mtee tailings, the area eevared by s thick ayer c f tellings ;s estimated te extend approximately 3 km ate-ng tee coast and at leas! A km from -ha shore line. A united Nations Expert Assessment Mission who investigated this event, as one cl their conclusions, omteC out teat tbs mice -owners had an inadequate environments: management structure. No apparent risk assessment of tbe ispiaa telings pit was earned oof end consequently, no effective contingency piac, seepage end/er dowmstream monitoring pnogmrrmes were in piece at the bme when the tunnel Plug tested, Both tease factors contributed signikeesntiy to the fvlsrioduque environmental disaster and the failure of die mice owners to rapioiy ard effectively stop tee flow of tne mice failings H a the rivers. Clearly Ihe crigssisi design of the concrete plug nan tested te adequately consider the very- high 'pressures that would no ' Ir n -c i \ to* * i d v toM a i r q - !f- f 1 * w i ii w d a -i no-'-dared tee seepage forces that would develop in fhe ground surrounding the plug, nor the strength and dete-matiun 'Properties of teat g - o r d Had the mayor been giver consideration prior to placing the p*ug, a tela investigation mace from he surface or from vwfhin the funnel itself would have enabled a satisfactory design to have bean evolved foi the construction of the plug. SO Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 52 of 145 ED 002061 00172724-00052 b). Thisk8M%d Tarings Disposal CP'D) Syssen. Ths aim afthe TTD system is So es.minste the possibility o? deni Sai.urss and ixvent tho poSiultan attributed So conventional impoundments, It also aims So induce the cost o?reclaiming conventional impQurdnehl* after chsura. Ptasa ai i?s are achieves by depositing thicxansd tat tegs tram e topographical high, or bom central tamps or towers, so as to iorm a seif supporting mooed or *idge af the stored taiiirgs. rn is minimises toe requirement for conimmg isms. eliminates the need ter a ssilR g peed, and shapes the discharged tailings intc a seSf-draining easily radsimsbio shape, having slopes d 2 to 6 percent. Tit removal of nrucb at Ifia preosss *a le r fmm tha Sailings is achieved by passing ths takings (h*ough nigh compression thickeners. `V3 to % of the orooess water is decanted from me tfvokenera as clear overflow and is recycled sack cto she process. The thickened tailings do npt segragefe. so that ell the perrtde oiese stay together forming a bemogeneocs mstPrisi with a high eapbary suction: when pieced layer by layer, rt dries to near sis shrinkage limit sod becomes diiahve coder earthquake strains. thus prsver ting dquefactiom H tends to remain saturated almost to the Surface, thus preventing tn devuinsmam el aetd drainage and so oecamos syllable for eventual ioosol arid vegetation. Dstaiied oeserption of tbe system rias been g-ven fry Halwmm {'iW M i Example. Tba Faraonbridgs :.td 12,,>o<; wmriay copperdinc Kid" Creek mme in Ontario, Canaca, wos converted in ^572 tc use tte TTD system So avoid having to bard traditional takings cams on very soft and sostefvs ipy foundations. ""he disposai area of 1428 ha, with an average diamefsr of 1.5 km is on a topographical high surroi.im.ied on three sties by a over, inkisliy discharge was from $ series at spigots from a central ramp, but 'ter a single poini tltsdierge was placed a; the nurfh end of the area with the infsolion oi moving i! progressively to 'he south to creole a ridge so es I allow of progressive recramsho" from Sue north sec wolfs deposition continues. The slopes formed era between 2.5 and 3 percent end the only retaining dam required is 10 m big* across a smart vafey. This Kind Creek ooerafon was tbs first TTD project arid white considered experimental a; first, too system has progressivory avowed to tom-; a successful method of tailings deposition, now opetafng in its 24* year, example. The open pit nickel sulphide mine si the friouni Keith operation in Western Australia prod mas 11.5* 13* tomes of Sailings a year. The eras is isfeliveSy fiai and semi-arid, with an average annual pan evaporation of 3800 mm, while the rainfall is only 220 mm. As a coeapet and potentially safer method of idl ings storage than trie traditional paddock method mins management chose the thiclranod takings disposal system, originally proposed by Professor Robinsky -n 1368,. Following en intensive field aw l wborarorv mvostigation, they designed She storage facility to be able to accommodate 250 x K / tonnes of Sailings at a rate of op to 15 x 10" formosA/ear, The storage area is 1700 he, with an average riismera" of 4 b km o r Sand with a very- slight tali of ony 12 to 14 m from weal to each A perimeter bund 14 km ?ong surrounds fire site to prevent the spread of any m ate ria l that might ba carried by rawfaii run-off. ^here id a oomra' sor pipe surrounded by 8 other risers 35 to 45 m high and a fufiy automated three-train, swo stage pumping station ahie to deliver the fnickaned takings to any user at a rule uf 8 x 1C" rrr pe' hear. Underdo-snage wee ,stales in tee gmund surrounding seen riser, plus open drainage to celled decanted water There are beck-op systems ncuoino spare naere, bypass line, dump valves etc... and toe fa efty is monitored ramotey continuously by telemetry A computer pmgtammo gives comgarisen hehvse" predicted end actus 1 mound Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 53 of 145 ED 002061 00172724-00053 *tvofi,'v'',s usmg noria* phuh'-grnphy, "ho 'w.Sify was un* m-Wsus'wd i!' e,,f 1 w? v9 5 idsscj hss esa opeiah'y mobm o siy sr'?,a This* .ifermN rm Hh vspuieri hy the Tins uw 'esa vVMC Rmmjsces mm.fed, V t " FxjfTpjs. The thickened failings Qispsse. i D) Tyxfem hrrn hson sed at fbe Peak God Mme ai Cchet, New South Weles T~K .mdsrrnqno 7srr . ostokliscee .o 092, produces gpid together wi;h copper, toad, fes, bul rafely OS * 0 icon as ai as takings a year. Th- abasase of rmy sipr*fcstn amount J vasto t t A from *h>% underground mine msdr Ge ides of a r impeundmud rr,qaer,q nr> fa?m 'fe us psdfesfany attractive and me eaotsai sfisehnsye manda ihu coibdwats wusk ai having to move the discharge crcmis as required eon y Isa s,u'"riw otio - at [he Oner typss af IsAngs dams. F 'h generas arrsarfemeri k r fee sten-ign is sn;)w~, hy Hg 'B J SAFETY MANAGEMENT The process of mp'ememNg cecfsiona associated w T ths assessment, fe,erat on and 'eduekon of risks eon he farmed safety manaysmaat Owners arid operators have spedhe responsibilities for their dams and fire freed to formulate safety management p. oeecures. I'sehNcsl and managerat spswoeehes should he utilised to improve safety ano redos risk Continuing day to day safety of fee dsmimpcundmenf system w J deae^d ea some form of observational rnefn invoiv-ng surveillance end monitorng, using suitable nstrumerttation fo reveal internal conditions, Aa rcrease hi safety is provided at an inc'easa .n oust end a balance has to be feund between dem safety and economy, Cost effective ask mdu<8or. involves defining the acceptable level of ask reducing the risk of ih& dem breaching fa an eooedsabia value and implementing emergency managoment procedures to endeavour to ensure that there is no loss of >ife should me dun breach. The approaches to risk resection or fee dsmbmpounumefe system can induce structural iiTprovemeres to fee oam and ancillary works, improvad surveii!a;we. monitoring anc maintenanca The approach to risk reduction for the dowosir&am valley system include he preparation of inundation rasas, eshmaiion of the tin* o* arrival of ftooe wave at different fncstians and the tfurafloa of inundation and the implementation one maintenance of emergency warning procedures a m systems, unlike water, liquefied taJings do net dnsiri sway anc fee deposits left on roadways can seriously hamper emd-gency services. r he weight of tailings is such that it tan cause y?uat damage, much greats? ihasr that of an equivalent flood of water demolishing buildings rather than ;ust flowing threugh than?. The difficuifv la knowing when to give warning snakes the operation of amerggney procedures very difficuit. Sierra Club v. EPA 18cv3472 NDCA kp Tier 10 Attachment E Page 54 of 145 ED 002061 00172724-00054 Attachment E Page 55 of 145 ED 002061 00172724-00055 Tier 10 Sierra Club v. EPA 18cv3472 NDCA 0 0m K\ s 303 6, 0 & O L 0S m & 0 m ex m23 4 3 f. & 33 6 0 02 S' 0.023 0 ? a is U 0 -0 o o 0 0 !0 3" ill EaF 3 'm00> 00 cS?' -s 0 0" 0 O' i 00 0 0 00 0 i>Tyv ww . 0>:&<.< 0 0 O %tv 00. 0 C0l <2 ..0.I 0S' O C0l S 3 0 <00 0x"000?YVy? 0S0<O00?3.33'' *sqS-' 0n0. 0O2 0 >0 S00' & 1` V0 ; 0 Sr.>. & 0si 5 0020V0CCj ,5 0 VM # .' 0 <m0 0 sj 20 20 0 T &3 0 0" 0 a 0 0 0 -200 .0yy- 0 T O 0& .y Si 0 O h2 00 O : /Wy, *< 0 $s: 0. 3 322 0 S 3 fv! fjT q 0X0, 0 <": 0 0 00 . '?} 0 0 03? i0 S' 322 &2 000 s PaS b^"0 j 2' 6;. ~r* rsr- 0 0C Si 0 <XyT 0 'C. T , 0 O S ' >20 O 00 S3 s 0 V0 00 # 0 00 <' 0 S0' 203 m 0 0 3'0 Cl 0 FC 205 f\ 03 p ~0F rt 0' p 33 000 3 0 0S3. s0 0 20 `<2 0 >& /> 0 ss ri < & CS<s>ii; s~Caei, *oSC2* 'CSiC&*CSD'f; <_>Xa>XS; a*8. E <$ 5' r> "*> <r Sf S Cexi o' S pg ^ & &NO&S"2gDk3* SK* f. 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Regolstofy Authorities should bo a;te osncsrioc s to a t the sa?uty uf '.ost ys d-ans that c<:*r.0 u^dor their jurisdcSion sou should m cAfe periodic ravows, --au- d rr by appointed specialists, in sunre countries eoprcvoi Had so bo uPborsud r0' sp;,b]e sisgss ot o jristrs.idiO:'o causing toe stabl'ty, qenprai condition and anfefy te re ats'oroatsoaOy ooeoised imm lime b {rots Sierra Club v. EPA 18cv3472 NDCA Ail Tier 10 Attachment E Page 56 of 145 ED 002061 00172724-00056 T LESSONS LEARNED : IMPLICATIONS FOR POLICY - A UNEP VIEW 1 pmvgffisnts nm mcrfo hy teaming the te s a ris of phpsriono and using them to a v u . sopjaifeg tbam lsoKo^ pifoe east This Bulletin is intended to be of nefp io ail those soor.ected in ay way wit tatl'hgs storage? iaoiiktes including owners managers, contractors, engineers, aomennel 'sponsible for day to day construction, end government, o ffic ia l coocemgd with regulation in highlighting accidents. the aim is to foam from them, not to coniiemn. UNEP commends COLD for its ihnroug wash n compiling and analysing ih.s anewe data bso of accidents-, incidents and remedial chon. The Boiled"'' dearly shews that many of the tailings dam accidents which cava ccu-md save hoe preventable. Atsn that the factors which have contributed ts fa>fores have often been common to different sites sod over dm, h makes the pomf that the technics: knowledge exists m afow tellings dams & be built sod operated at !ov* risk, b<..t that accidents occur freq-serby because of apses in the consist?;? application of expertise ova? the full iife of a facility and because of lack of aitentio" to netail. ~lys <s a satisfactory situation f" a industry under public scrutiny, whose products ere an essemisi pas of daily foe- and wrfoh contributes io ra n y qcon,,<mioa amunc the won Major accidents naturally destroy eo .-tiffutv and >Gitsnui confidence. By highlighting the continuing frequency with vwmth they aie r-ccusdno mm the severe consequences of many of the cases, lids Bulletin provides pome /new evidence that commensurate attention is cot yet being pain by ai cnn'sm eq to afoe tail-ngs management. This is surprising given the high nee w h rh t?.<nc>* <foms dewonsrsbiy pose to life, the enyfmnment property and the profoebikry fo eempan as UNEP lias seen awareness of the probem escalate cramatcaA/ in Ibe last 3 nr 4 years w .tn r ie e d rq companies, industry bodies, governments and community grnsFf,, Tea Wm d 'd/ide F jnd for fsfofora, for instance, cormnenced a major campo-c" in 1998 to focus attention on m irrrg waste lagoons i Crurops. The inter? Ptiona Co_nek on fopiais an foe nv.ronmet { CfoEj as partnered with U^EP in mo.ioifog twe m.ajo" taifnqs workshops, >n Sweden i 199? and i Buenos Aires n 1sh)L in 2CD0, ICAIE commissioned Gsidcr end Associates to review ieo adequacy of treating tffomqs management ou deli'ios to see if there is a ~eed to consolidate and slranfohsn codes and pukieiinas for ntemauenai us. (The conclusion was that il woufo he heceficiai) :n 2000, :bo Govsmtnanc of Australis ano UN'PP no-hosted foe first tetergovorntnentei Workshop on Environmental Regulation for Accident Prevention .n Alining: Tailings rid Chemicals blsnsgemem. UNEP is working with interested governments to establish an ongoing Regulators Forum - with the safety end environments! performance o? iaillrgs facAtfos ad appr&achss to Ibeir ttguiaUan as a coatinalng them. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 57 of 145 ED 002061 00172724-00057 Sierra Club v. EPA 18cv3472 NDCA &0. CT? 0 i-j & T" 05 | | Tier 10 C i T<. m0 COi f"s X3i 1 I * a V? <c TT 0 t0s o a 0 *s i0 0 0 O O T 0 0 0 <: z 8 .0 <`3 O 0 h 5 ' tr? Cv; rr S> is S5 CS Si T 5 a >& S i. T IS Si T 0 0 ID is . cf 0 0 0 0 0 CT 0 0 s 0 yS> 0 0 0 0 0 80.' Z ss Vi 0. ><" C2 S00T05wx> 1--00000r0*r > <i"0 TW 0 <.0 0 8S 00CC-C 0" g;< 000 00 00 60 0 0 H0 P ID0 a 0prv- i0<? *0 m 0 0 8' *3 1 ? % ai. a<*;>.4Sm 3p "nwki SP- *:. $? i Ci o0 SCT' vC<T . r? t c? 5 nczs ? 6 * <* 0&`Vs SS&' 00, 'p C^. T<Jr>? R 3 Y0h o"i $0 &$ < lf n2Ti iB& m >0C00l 00 ?. T&03 .:S003i.` S' 800. cS05r <s c %>r 00 ** ID ^ ^Z <bSs*Yi* 08S*:0SSi* v&sr 0 'is 5^ te g c\ 21 mV/ s> i? T2 Si $ z 0Ti P p o?3fY d "ft- O 00 $iL- a : ,,. J % IB J v 3: i0,.-,rs_sf m St ^ & fxSlTr, oc0r T if O aa 3 , 0<g S' 3 Cmz sW-:! 002~1 'o o* c TV %' (S 00>a ag0- & W l&SlS O&o2. 0j-w Z rlc CS>S ' $ T; 0 .0XC 0 0 00 m- -- 00 " 0'i a0. 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Sound pc-Hcy can unooobieeiy ptey a -ote In accident prevention, UNEP a net simply sevoeaf'ng the abandon of mere or toyyhm to-gJation nut. nether, the -evsew of too structure of reputation to assess its effectiveness specilktoiy against the particuisr goal cf erssurmg the sole management of tattings darns in some oases, toteetivs rripiu'ntst:on of existing regulation tray he. toe mom mpodaoi factor: others it ay he the further training end skgfs of rsg Jeters to swsreise their oversight ctohes effectively Tee result needs so be that gavsmmanta pf^y tea r pah as m s of the agents oontohofing to the goal of Pccideir. prevention, to p U 'rq ilia spotlight onto the nti of regulators. UNEP does nos 'want in any way to nova spies' lias ruto of the owner and operate*. The unequivueai statement maPa in ton b M<r i t -4 'the rsspensth'lily tor the safety of failings dams must iso with y'an'vnmant w mtoerselty spplcahta Tr.e Workshop on Ernwronmentsi Regulation tor Accident Prevent in MinmgTailing: otto Chemicals Management, which was co-hosted by toe Government of Australia and UNE0 in Penh In October 2000, brought together regwaiws and exerts front 20 oountnes io mate latest thin-nog on effecive approaches re regulation of the high hazard aspects of mining. That meeting heafe from yovemmants wh>ub had axosT'orced major failings accidents about what they sea as important io prevent a recurrence Oesotte a diversity o< snuatfcr.s in different countries - ctimaces. nature of om-hedes, size of mines and numbers of mmes to bo mgutsted. differing expertise cither .n fho companies or in the government, and so on - common element emerged in the d.soussion of what to universally required to matte a durance. The dfeeussien was m uc; mere about rsg Jatery tools to ensure oilgenue and :c strengthen quality assurance, tt'an ii was about specific standatos or teohmeai retirem ents. The* was a recognition that site- and ora specific operation! differences must ae accommodated and that no two tsif.ngs dems am the same Regulators were genersly seeking io strengthen ihesr systems of review, reporting, inspection, oversight and soneitea, rather then to proscribe oporstsofai narametere tor engineers and managers The Workshop, Nghtignted a set of things Ic oto.ofs regulators need to pay attention sn order to reduce the risks end the consequences of aonjoenfs. Foremost emongst these were: Government? should evaluate the design of tailings systems proposed by operate; s and inspect those systems. Some specify certain safety factors or weather mtorn pewtds to be incorporated in design dependent oertiikietion of design was sear as a Endemeniel requ.rement, with regu'etom using expert odvtoe at atm's tength from toe company Governments have to adcress not otoy sound design hot rise con?cl opetobom wito ai! aspects of toe life o* takings dams being heportanf. Repeated inspection and certification of staoiilty may t>c wa-'ramud and govamments :5-routo consider requtong irw3cpeo{fsr!t espopfisns of fop dam against design at adequate intervals, as a condition o* Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 59 of 145 ED 002061 00172724-00059 ppprfoygi, Some governments already have 3 'oie In approving 3ii phases - design, ;:orssS on, certsficelton, surYeifemes, closure. emergency panning. The post ~ dosjw phase is or csedloufer !rrpcrtancs io governments fogeeuse His sts&Hty nr closed ladings facilities -oust foe maintain jn perpetuity. A ka, |i aspects <>f tari'mjs systems need te foe severed, trees accidents occur in teil-ags pipelines as 1 as a dams Governments seed to take a foeiksto appmecn to lee r e la tio n of takings dams since s range sf expertise sad deferent agencies wdi U involved Attention to coordinate and integration is therefore important to ^ C H . put no am overio&koii <Ms>" as 4 p^mssf 'n's.hnn. continuous m.enterng sfomld p tcguifel, us'ng nmnimu'-tetso" as ipcrnpnafe, which gives m s">ngh,d moTtetion v ton sa'ety 'erto.mcuco c tlh s fao.tiry. Oovemms;s may reco-re uponting oiteuges to iedo,,C ' sk n f 'e igtsi. of monitoring restate and syatetiaooi yxgcoatue n tne iosg operating phase d d in g s Pams earn-'ions can Uv.ngu vufo-to.nitoiiy and oetoisreesn eifeumstanues anss winch iuqa> *f lesnbe res-innsc: bv .>o'it operator sas regulator, Regu-ators and esrr parties need to focus on risk roouotkte end contingency pisndng as well as on desig-', ope-refson end comp sense, Reguiators need to consider reguiremonfs for nsk reboctson In foe tost-affesisve as well as to allow aeceptaoie ievete of ask. Governments should requirs smeigency plans to bn developed m folyh nsk situations and induce emergency procedures in site inspections, io the case at orphan sites, .here oemis to foe a process of nsk assessment and pncnissstion feeding te preven tive reman rpi action at togh fisk/teg'' consequence sites Governments need io be empowered to ate to rer,oso> ranxrtivo mi.en so the ease d - ,,rafoiem arising ~ before it beccinos er wnmyte ny fn -foe rumpnny bus not. steady rfone so). Regulators need adequate oxpomxr' unu av'ress to competent edvsou 1 taking tease doeisons Aecuimmcrito to ranon 'near misses'' oycritical events- can assist governments to be eroeeiive. ftogulators need to be tteimsd and to gain on-ground experience io tailings 3am msftere in order to oe afole to mterpf! signs, reports and data end to take competent decisions Experience is required to be note to vises? so esrsemyng prufotems and tfoess curssuqvei'iufos. inspection and monitoring protocols ednuto t;s developed by experienced regotefers. Adequate resources need to foe available for regulatory purposes one regleteos else need ;p nave bote toe power one the politics! soopori to fake cation or- to ocpfy sanctions whan necessary. fob re t,- eitoiy, i su s agreed rit rep, tess ahoy J vneonme nr and ways to reward rmmpaneu autsenoy. aitnma' ly to ids-ngs and rto,et' ewlrw na guide snm' site monte manaqimtom sy-omne rq ^ that mpteatrm heJo fon devirtoceri n m rrmn and trnnsptrc' mamar, rt consuSnlspn wt~ .-'cmsntirsitlns, so emer to meto cortearas nno sv fouiia s ppud fos ^tufevto fouooc on sr aooufotu u-'d-tostondr-g of tor* r 'asks. SB Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 60 of 145 ED 002061 00172724-00060 In scrna coMnfnes ?d in some esses earn/ M tee things are aeeady She ~orrn e? are on tro agenda ci reboisions, io o tte r ore o ase s Shay are not UaEP <$ of the view Osai t ie list io wash {ro rn tfg a lrg for ionhor dsosssior end iyrihoi e adora-ion as U. now sorso of those SMags er aemaily hung "one m coo rSho ousk- oy rngdetesa One propesa! which was raised ou '",,si 'inly y;pom;j concerned She oo~eihiy yf .-i^iiriny aisips facility o smiom io he csdiPed oempeissvv - rodered aspects at aorga m anageren 1 u \P P beteees Shs s w olhy nf further desaussson mve v;ng the rytestry, ijoverrfnonfs ano train-ng i" stsfudnns Toe prepesed Regulators Forum wP provide ao oppedenify so io te tome of the thnwng le dio oc-*! ione os weil es le ssread >t more wicefy amongst coemnes. USER voiuoa i;o sssoe adori with Cf)t..D ss She 'P-'d!' y <Juha r u f nr fv on hdlnys uem taohnh.ai irsyr.aperro.o We '.vii- cord noe So worN w-t" k fd t j m, w in nihar r.onncrs ;o atstea Xb-ii sound eorsnwoimg know ege , r d I mhuktuus am spoted m ste tieie arso ihot rard-wen iessons ~m m i inamen r.n,y hy the: spneiaiists ,N~F commends m s B ufeih te -d: owners, C'psratere one mg, poter*. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 61 of 145 ED 002061 00172724-00061 ANCOlD { S9S). Gu<le!ifS3 on ""aihigs Dam De"Syn, Cori'> Mi * r d Operation Australian E hiiam i Committee un Large Dams, 83 pps, C'Appolonia E {1976;. Contribution to dsmussoa o f G 44, Vans?. 12th lm C.cmg targa Dams. Mexico, voi 5, pp 14&D47 ASCE 119751 lessens Gem; from Dam InDdaftfa* USA. Published hy Am m lm o Society of CD8 Engirteem, 387 pps. ASCE (988). uossons .5>mi from Dam inejfteats, USA> fi. P u t Aram, m so * ` oi Cm2 Engineers 222 ops. AsKar MR <19915. CcnatmcaQa of Saucesmrea sactiis dam an crusher and altered foundation. Trans h i Congress on fa rce X" m*; Vienna, v c /3, #> '79-125 Asdm fa9, Fsadam V a i'; Tern < r i "W ndE-D ^"m o m a exm elilud v,nn t o msfirm ' d nwdf capon ol S&mPesmrm ' dm" h\,oo h i Oooyo ss n t mga Cams B.hm n, vo> 3 pp 838-838 Dosi G. Vika -, Dovara D. Dasemib R and Brauns j UDB2; '"da dossier of Ste'-aAodltem 4a!y. Hy&euHn 3 $ Stmciurm, Dpmooh/ Cmm G CKVfiGCE, Ami C rjih x pp 4$Z S i8. E;;s~.ep AV *I9?2i D sees- cm CoPiery Spoil Tips - after A terfew Part A; Proc, im h l E,v Kogr- somton pp i h f PPM. Bisnoo AW (1973). "ba siohifity of lips sad sno-f heaps Quarterly Journal o f Engineering Geology voi 6, no 3 & 4. pa 335-376:. Bishop AW amf Sldh S (1950), Undiahed PoAd eals on saturated semis sad inair sky-ficanoa A the genoad theory of alesar strength. G&^emsque. voi 2, o 4 pp ?3 - 3B Bffpb{ GE { f97a'5. Destructive mddffovvs as a censequeaes of tastings dyke faiUreq. Geotechnical Engineering, Proc. h am Civ. Eagre, voi ?26 January. pa 349 Slight GE flS97b) insign; isle la-tings aam fpiLreo - technics! and monogenaG `actor*. Proa Tar Workshop an Managing the PAics af Tailing* Disposai Stockholm, Sweden, May, pp wv.34, Boifon fvD iW-hhi Thu A ~,n<,P, e <t ktahiiKv af sands, Ghcmnp'ja, Vc,1.m, a f, po 65-75. LLiA,on, D , temms m, . . pad Ck-vm " BCD. a -.is for ask aoscaunmnf h, da" , s-ted'v aunagomaui eyompomor' 5?, P-o~, ? ' h i. Cant u-! vVovoaemcr Da,'dm m, i inolilo m Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 62 of 145 ED 002061 00172724-00062 Cassg'snts A, (19851 Rote of testeuiated tek' io earthwork tennd-don erg noering. TerxagW lectors. J, S&iMoah, Fon DP. Amen See. GV. Engrs, vai 98 $4, pp i-4G Cosag-andeA (18?m, On iiqeetectten shaooniena. Reportedby Drear) andFergtison, G&oi&cimkivt, va) ? i, no 3 pp ?5AD92, Casegmnde A and (dadvet BN (1971) Design end consirusifcrt of tailing dams. Symp qo Siebiisiy of Opeo PH Mining, Vancouver fi'2 ppc Castro G (19688 UgodlaGoon of sands, PhD Jhssm Harvard U nim m iy Cedergten NR (198?). Seepage, dratesos and Saw neis, Pub, f t y & Sme, Maw f a r t Chamber Of Mines of Boote Afeoa (1979) (Revised 1963 and 19851 Handbook of guteelines ter environments oroteefcon, vo 1, Thq design, operation and e m u fe of meiaiiferaus end coal rasteue deposits roe Cdsmoao of Mmes, Jomnr.esbsirg. Semiti Afsn, CnaudSfif R i (1951) Slippery sisees and swaling sols, inaugurai! P /ctuporiai i. estera Dapsnmanl of Cvii Engineering, imperni! Cviiege LontSOn, 2 pps Chandier fei end Tosati' G (1995) The Stava teRoga earn falters. Italy. Joly 188S, Proc. Insto Csv, Bagna Gaetech, Engng, m ! t (3, issue 2. pp 57-73. rondan Clayton CRi, Simons MS and Niadhews (SC (19821 Son investigation; a Handbook for Engineers. Granada Pupiisivng, Grass Britan. 424 ops. Ceso.- RE.te?86). Failure of Catengtoo dims. Repod o Urn SacmMry QfSiaie fo r t i Environment Luorinn, 236 pp&. Graba G and AtPnsen JH (1981) Determination of soil strength parameters ter it a ra sse of highway stese failures. Siepe S ia tty Engineering - Rmmtep metes ami eppcelhns, Frocaedtgs o f fetesfedor; of Ciri! Enginers Gankmjnce noe .<' Wigdt. Aprii, pp te- to. Landern, Grouan DB and Pandar ITA (i 665) Sold oraste disposai sita selection ter thp teciaoghlm gote project in northern California. Socieiy of Mining Fnginaere of AiME, Transactions voi r i , pp 1839-18&6. Dagrinais C (1975) Conciooteg remnrffe lo discussion on 0 44, Traps, 1216 in i Cos,g. Large Dams, M esto, voi 5, pp 131-183 Ossa. Rivi and Vick S.G (2980). Dam Safety Risk Analysts i>it Rovaio D.-my mm"? 2 ( f ni. Congregai arge 9ams Baying, voi B pp 337-350 Dotty R and Aivamz . (1997), Seismic tenures of Chilean ladings dams. Riso, ASCE, J tt S tM F DMiton, vat 93, no SM6. pp 237-25, 61 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 63 of 145 ED 002061 00172724-00063 \ and } i * iQG}. The ts;ir,ga pond latum at ihe Aanaktdilar mire, Bono m* ri S>,n<p -n.-Tr<>r>i?n?3? issues .-me? VVDsfe Management m Energy and V ti&A i F n .a n C&y*y, <i>mna c a s e 's , 3 (f' Way 10 1 * Jum . Ke4 R, MacGregor P and Staplooor: C r 3 0 r ) . Geoteciwicei Engineering of Empankment Damp. A.A Baikema, Pcttordam. f-ookes PG and Dale SG ;1082) Comparison of rnisrpreiafinns of major :andiide at on eartbfiii dam site >rs Papua Mew Gu.nes. Quarterly jo u rm i of Engim &ing Gemogy, m l ?A. pp 313-320. Re k ro n e RE i999i K<-r Teraaghfc I f angirmsr as artist. ASCE Press, R e a m i/Gpma, V3A 349 pes fC-vISiSfdaffJNEP (W37) Proceedings of fatsm atorat Workshop on ?Kra g -n o "h~ Rsska of Taitinge Dispose^. Stockholm 33nd~*3rd May, 2o f pps. Puhi'M'md by latemaiinam Comm! or. iBetsis ane Em Environment., S'promo, Canaria. CREP/C;ME G993V Proceedings of ids Workshop on Rio fPaoagsmeot and CO'Wngonsv Piannirig in toe Management of Mine Tsifsags, Buenos Aires Argentina. Jem publication by laiammioaai Coeaoi an Marais and ion Brndropmant. Canada, arid UrAab Pattern Bneironreeniat Programme. Paris. 314 pas. ICOLD (1874). I shoos ffom Dam incidnnUS. PuMshmi by the International Commission on Largo Cams, Paris. ?003 ops. fCGsD (1982), Eriiogm ohy Mm and indusfna' Tsltngs Oams and Dumps. Suletfh 44. Published hy mo intamedonai Commissicm an Large Damp. Paris. 23 pas tt CLD >" \G A Bfciiogt-iphv, C>;H: m*"' n.'osfmsi Ini'mos Dams and Due p* P n lm n s4o f cbiishsb by m ; `G o,am ryi^i Cnnmvmvn; an Large Q>t,e.\ Pm * 3:i. i i-.y .-> itxif.O iiy tw ; Manus' o r 1akngg Dmm and Dumps Bulletin 45, Patbrnhed by the hi&meiicnat Commission on Corps Dams. Ron's 237 pps fCCtD n s8 ). Takings Dam Safety - Guidelines. Bok-eir 74. PnhHsbed by the int&aahcna! Commission on large Dams. Paris. 10? ppo fCGLO iis?84). 6moankmo< Coma Gran.,far r stars nod Draws Bufiefn 9S, Published Py me iniernadonai Com m im cn on targe Cams. Paris 253 pps. fC C tE {18941 Toffmgs Came - Design d Drainage, Buiiciin 3? PaUrmab by n e tn ia national Commission on Large Dams. Pahs. 120 pps. iCOlCi f'3331 Takings Jams and Ss-smicity - Review and racomma'*dozens. Butat-n 88, Published by the M m national Commission on Large Dams. Peris. SOops. ICOLD {lOSSt Tailings Dams. Transpod. Plscement anc Oeca<">fafKin. Bulletin 101. Fabii'snah hy Ga iniernaiionai Ce.mrsks/oa on Large Cams. Paris 3b ops. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 64 of 145 ED 002061 00172724-00064 iO L PESO), T a in g s Pams and the nvimnmars - Pcvew s "'d moomrsaadatioas, rMtetin ' CP. PutshB by m lte m e te at Commission on Large Pams, Pada, i i pm !C_0 C19S6) Monitoring of T a tirg s Dan - Review ano racommendatons Bulletin 104. PuoiiShad by the ial&natHXtaf CotnitHS^cn or. Larga Dams, Parte M pp$ iCOuD (1988} A Py-de to T a in g s Darns one impoundments - Design, sonstmcitea, use and renaLICsiloo. Bulehn 108. Joint pubkomcn by internakomi Comrnisston on targa Paras and me United Panons EnCroomsemi Prcgnamfoa, Pads. 239 pps Jennings JE {1879}, The fsimrn of a slimes dam a; Bafokaoc' Rechanisnn of failure anc associated oesign considerations- Pte Stete Ingenieur >r SuxbAinko. Juno tissita. san tfeoassron, pp T3b~1A&.. Kaeiy, CD and Busch R t :879i. Evaluation of m m tailings disposa?. Correof Csteehn/caf Procree in M im Waste Oisposa. ASCE. Ate* York, pp 1S-W1. Keeney RL SSO). Siting Energy Fadiifes, A m lm is Press, Kenny TC, Passa IK and C 'o SVK <tl-1K> Moni- n V sjsers sn rom!u<.aou alcona, Prosseds'ga of CunynW? G jnrnsteosil C oitem i me, Cwnwuver ,C ,, t'ens.on Kt P/drooaofogp Wehe EJ {1980}. Tn development o* current tailings dem design and eonsteusttee methods, CmUgr, and Ccnsifvcdon o f T&tfngs Pama, ad. P 'Mson. Cc/orade S siool rddfioes Press, Petiten, Colorado. tantee i w and Whitman RV (T78), Son Mechanics, Si version, Pub Wi&y b Som, Haw York. t ' Wansoeng end Un Zhejun (CRIS). Two Ptunosa Talingo tie n s casa dis,taries. Short popar oraseafed ta ms? COLO Ccmmilm on Rdltegs Densa and Waste Logeons during ma Sondage eatery. tunee P 978K DsuuJ'ys suf tes -'tenues de rejets miniers. 7mm . >, p<,,< terga Danna, Msxtoa, ve- 8 fgj Hte~1 Lupini JF, SKinnor A ene V a c ila n PR ite ;:. m a drained residual strength of cohesive soils, GoiachtvQu, vol 3 i. no 2. pp i 51-213 VkXschnte Thomson; 0 end Radili 8 f197g). C e le ry apoi tips after Aderto, loom d v . t.ngrs, London, SO ops, Re?,sea H anc Piswos H (1989), Rfed management analyses (RRIA), Pmomdingo Caoartan Dam Eatery Contemns, Memtdh Sassoon {? 988), ta s Frailas aftermath. Mining E m rm m a a m MBnngemant, h ty im m gp S3 2. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 65 of 145 ED 002061 00172724-00065 Mining Journal Research Servios P888?. Pavsmnmestai and Safety incidente eonesm:ng Tsings Cante at Maies. Rmpyri prepared tor the United Manone E m k w r& p ia ! Afexpaainm 12S pos. Avstebte t./NffP Pens, MNtsi HK and Morgenstern NR {??). Design nag performance of fellings stems, proceedings A$CE Geatechmcai Specialty Conference, pe J?$~492 Morgenstern NRf1S96;>. Qaerethnfes anti mine waste rr>anageie*i Prvc tut oVap Se>&nvc and Brmronnmitaf Aspects of Ga sxin; Eedh Concmte sen fences Dams. Santiago, Odds, ?!"'' o /ffe Oofe vo/ I?, pp feici. Paviakis G 08781. Contribution to dseusson, Proa. C a rt an d a y FPs, Jmtn CD, ngfe, tondom gp 2S-2CD Pock R8 (19891 Advantage and (nnlHtions of the sarvalionai method r applied soit musnanscs. SiH Raokine Lecture. Gofecn.mgu-e vo! 1$, no 2 pp CfePfdT, Penterm OCR, Chndes JA end Me-, nod PC (20Q). Risk assessment gad safety of tiling 's dam? end -saMe impimncmrMs i 'm m , 2XP lot, Congress- L s rm Dams, eaipng m i t g p i d fed Ponmer ADU (1853), Shear ehsuaefehstfes ot a safereted slit mossy red in triaxial eymmess.or, GsetscnrJgee. vat 3, no 61 pp 3?2--6'2S. Penman ADM a"d Charge JA { 1991} The safety of tskfegs dame end lagoons in Britain. Proc & h Baden Dam Snooty Con/., The Embankment fem, harm s Telford u a , London pp AAfeo Polls DPI, Doumas GT sod Vaughan PR 11390). Finite element analysis ot progressiva filiere of Cansegtori embankment, Gofeennyus, ee/d, na 1. pp 7 3a Oh Paus Dkl, Kovacavrc N one Vaughan PR (1897) Delayed collapse o f out elopes in stiff maty, Goiechriigas, m i 4,7 no op 053~S08. Rcdokic V ( 1076) Present trends In construction o f tailings dams in Yugoslavia. Trans, I2ln in i Cong, la rg e Dams, Maxim, vo! S, p 110*11$, Robertson AM. Shepherd TA and van fed OJA (1880). Uranium fehogs i rmuc u-Amovi see seisetio",. f t ormedrops Synp, Tarings Mmmgamani, Fori C( ftm , CaimaJu Robortson Add arte Mess AS (1081) She sefecdon and optimisation sfefees tr m*:t sites ac takings -mpc-u>~dmerfe fern institution of Mining and Matailmgy Con/emnce, Singapore, pp DD-TH. R fe.ussy f t y1fedJ s, 1Dues 1v V u ftfeknoed C ordal Discharge kfefei'd fer m-prcve-; cuno \u arid ~nv ruomu< lo i ccntrui. fto c , 2nd ini. TaPcgs Symp ,4" ep? C '"'di fefefer Cnn.nw;, San tre a tis e i- pp ft-95. P n h n fty Z- J1G3; ~h tfk*r*r: 'e.imgs Hep ass m fee Mining Industry. Pub, by F t Pabmesc/ / . w d . ' J, TmorJo, 2a< ene 2? Jpgs 64 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 66 of 145 ED 002061 00172724-00066 Rob$ky El, Barbe? S t, Wilson GW, S a tfn CA 3nc <"mriio.vi D>~ t m ' , Thi-kssiad sto la<fi-':gs disposal - A evaGotion f average c-mt awsiM* cot s/em a dramgs. Proc, 2nd Inin, Coot on the AOstenmsd of Aad DfSideet. iJ-oniin 2 md 1, co 023340, &ANMET, MEND. Qtfsws, Sandy JO. Plasdd ODA. Prische? VD md =c<t)s B3 { 1 M ) . fa i - mm d sta&fcstfom of c 3 dump at MuMmg m n, Zambia, prou i>\-4tt Ohemy ond Meioitcrgy, pp 144- 162, Seed -iS (1979) Considerations sa He furr quake res si M >1aaiaa J earth end roe-bill dams, ibtft Romeno Lecture Doav.e vene of P9, ee ?, pp 1 5-26 3 Shakescy RA and Whitlow jR (1981). P ,<.<. ,,<?a Mine-Waste Dar sa m Zimbabwe; Causes and Conseq-eaces. Estv<ror.mm4j i C oology awef Ibbfer Smaocea, vel IS, no 9, pa 143-133. Sperate JL Ounmgsn IP am; Talbot R( 1984}. Bssc properties of sane and giovai filters. ASCE Jaunts! of Gmtesdnice! Enrunaedng Division, Jape, vd UG no 5, pp $84-700, Sharem JL. Dussfsq^ss .P .jrd io f 'w J< CoBdtu rtto m for s."* ; lays, ASCE downer of Goomchmed rn y; ver-ryc O-s-orm, .hire, v d **0 n **A, pp /Of -/Rf Shereai JL, Dunnigan i.P {1S8S}. Piiters sad leakage concai in embar-tmem dstrs. ASCE Symposium c Seepage sad leakage .Pom Dams a/sef impoundments Denver, pp 1-30, Skemplor: AW sod Coals DJ (19S5), Carsineion dar failure. Pros, tesai ZV, .Engm S/mipes/oai art Failures in GmUmotAs, Lonaan, pp 203-220. 55m.Ih "W ami Siw-Tord GU (1EE7) HonsonfsS drams on California P m w.-w Jpi SM&FE fiv. ASCE, rot S3, no S M 2. Proceedings Pm sr fio 1300. S w e D w C i 1993) TVsimgs dam performance Pom cSCOLD ioddesit s-*? data, Frac. SOIE fin flm i Mooting. Denver, Colorada. USCOI..D f1994|, Tailings Dam Incidents, Drifted States Gmmiifm so Large Dmns, 32 pps O.S. Depenmer.! e i the interior, Bureau of Reclamation, Version 3,3, September 1998. Dpm Safety Risk Analyses Methodomgp. Technical Seance Center, Denver, Colorado VGoqtun PR, Hq" ! DW h n jh s VG end Wetssneks HJ (19785, Factors controJing ?hs staui.ny o'" clay GIs in Sntain Proa. Ccmf, on Ctey Rfe. instn Civ, Er:tys, Lennon, P P 20E.217. Vaughan R ano Soares HP f 38Zt. Des ga of filters fee clay corea of dams ASCE Journet of Geotechnics! Engineering Division. January. voi^OS r,oGT* pp 1?-31. Vaugnsr PFi (19895* Secsmeetanc.n ef baiirye*. Penal deensssori. Pine 4!3 ini. Coni SUFF Hamburg voi 4, pp 9561-2. Ruotisied Saikerna. Potfe.efam s Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 67 of 145 ED 002061 00172724-00067 V bk S s -9831 fe x rir-.g , Os>0 X d Ss<m, fern Y3rk 359 .fe .m p fefe l39C u< 7 l i i i t r t s i ' W S d e s * " U $ 8 |< $> P fe fe e m , fem.Oi.vC-o S,C v c - Ci C ' V>' irsu yn sk ks. t- ^ir|c sam Ctsv fdllyras, Pros, 9fd Rdfiamorffeas C fe m f e f e I f e v f e . U x w fe pp i ,\d'-l?SS V>'N f{- ( .MMot ~#s iurn et r"f Qm-s I c* Asm Cfemsrf''sam k,<w' p vk-l-4' 8 $ & p t@ fn & t V ic k , S G r d d f e C o r s s k f e a t s i s t 'a * " 'H :','\ i G \ , i S t s c w il R a s p o o s F r o d a d a d o s G a m iift/c tv ' R f e VswVsxs G S Butvif c! f e u . f e a / s , T m ^ ic e t f f e v t e m f e Gamm s'mipad;? f e x o < F :{196|, TH fe fe s p n J i sites dam faitore - vsfvlsw and fessa G?r P SA?C - Vcvni fe<mo f f>w c*rrer>:j nr<<* ?f e '< fite s te H k fe a a te feta,' Engtm m , P&StfcBt f ?~19 July `A f e t '4 s 't e a 's h e s , a r w f ' )h "S *r ;* < p a s s sss ~ s c i f e ? i \ , tw ? a e m m , ffe * ! p;v; ed lete-mp Roste fd.dl te m g m x te s te , may C teate < Vtemp xmim-d, s fe jfip , m> !3 1/9. po fite 09, '? odv W* ^sss-ifi ,'RG 1 Rte?', Saffe tee ms t 'e deasg aod operation of tsiogs dam, P w , Com te te o s and fe s m fitepCA m term;? Wote v7 c t e ~m Lm (si ihs &*!< fisismn dass fited paoe? p?semsfed io Ra f C fe fem m -site on i feg;? fe rn am ' fe e m t r_m.:sss >a?ms te te p p u meoteg, Vtete vV, kfeifeoo'Sks te a fe f fsvTS"!h;3 A fe te te Same aspects of assign of mm t f e r r s dam fern fe te ?? sfimmpf-s i ag>: Pam, O fe fe , f e o, pp F t e t e Sierra Club v. EPA 18cv3472 NDCA di? Tier 10 Attachment E Page 68 of 145 ED 002061 00172724-00068 10, FIGURES Hg, 1 Water slorags dam Ipgidtei compense. Fig. 2 Tailings dam incident. history summary; number o f incidente par 5 paar parted Fig, 3 Tailings dam incident and height comparison, Fig, 4 a-itog aam -attore and height eemprmsem, Fig, 5 Etere dyke on a dosed tailings impotrtomate. Fig, s Tailings dam type comparisco, Fig, 7 T a in g s dam incident cause: comparison with dam states, Fig, 8 T a in g s dam Incident cause comparison with incident typo for active doras. Fig, 9 Tailings dam Incident esose comparison vaiti dam type. Fig, f Factors teteancmg the pesToe of the ohmodc surface m dams bm!t Py toe upsreom meteed. Shows effect of tack of drainage arm layers of lew permeability pmducmy parched water su^aces, (After Fai ef o', 1998). Fig, 11 Hydro-cyclone, Fig. 12 Seeders o f starter dam formed by en estsiing dump, Fig, 13 Ssoliea ef Aa~atedtar fallings dam. Fig, 14 Upstream mvtood of cemrtmaon with spigots. Fig, 1" r,R egs lo w s of Ty flave oollery. Sorbii Ttees, is 1881 and 1965, Fig, in t- unire of the decani pipe et Stave, Fig, 17 Stress-strain curve fpr stress e c n te ie d consolidated undressed test so saturated loose send, Fig, 18 Tailings storage array n a TU, kmmd Usid si Li mteoma teeth ml. (Reprinted from R >1; rme, s/m Sierra Club v. EPA 18cv3472 NDCA t f Tier 10 Attachment E Page 69 of 145 ED 002061 00172724-00069 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 70 of 145 ED 002061 00172724-00070 : :Z I & DAM HETC?H 'i (:T3 'Fo s\ ;n g :> d n m n c id e n t o 11 d ;";d sd h F c o ;r ;v; o ?' ;s d n . 0;.*y H ii I \ n d d d iT'* j:Ci i..:/* 0 :;d Cd ;:q ": t COr?'p Qf !SC-* Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 71 of 145 ED 002061 00172724-00071 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 72 of 145 ED 002061 00172724-00072 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 73 of 145 ED 002061 00172724-00073 Attachment E Page 74 of 145 SCUi AND UNDP DATA Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00172724-00074 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 75 of 145 ED 002061 00172724-00075 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 76 of 145 ED 002061 00172724-00076 Sierra Club v. EPA 18cv3472 NDCA o Tier 10 Attachment E Page 77 of 145 ED 002061 00172724-00077 Si ;;a S" ;>* rswTtfS: m&x *>>?:*?: r-m ,:; W y v l -.v v.r.,:..:V .<^f-C^ ..:^tr,. OV?" y:V.y.-;.X* W; &* &3"f Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 78 of 145 ED 002061 00172724-00078 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 79 of 145 ED 002061 00172724-00079 Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00172724-00080 Attachment E Page 80 of 145 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 81 of 145 ED 002061 00172724-00081 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 82 of 145 ED 002061 00172724-00082 I, d -, i|iV !.. wa # " " -s r -, -s F g u r - icp T w i < n g a j tsrsge cpT c the Thick en .ad Centred Ohcnarct Mcthcd {RSp r :d t dd i i OP P<;d P":5Pi 13'/ d Sierra Club v. EPA 18cv3472 NDCA PI Tier 10 Attachment E Page 83 of 145 ED 002061 00172724-00083 m iu R s s m m - in c id e n t c a s e r e c o r d s 1, introbueSfofo 2, Abtwwv-aiians. 3, List o f taSogs clams for whist? Ire d a n i cassa wars cotfeoted. 4 Brief descriptions o f It 221 cases. Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 84 of 145 ED 002061 00172724-00084 miUMSS BAMS~~INCIDENTCASERECORDS i mmmmmmu This Appendix contsses srwlvidual teoores tor each incident iftetuced iri tbs compilation. F>-e abbreteetsons `.sen are listed i" Section 2, The tailings corns For which incident case tostones are provider arc feted h Section 3. 'Ate s jrn s n ' data. Section 4 provides mare defaisoc date end sources Or each case with a beef description of the mroomstances cr the hcicent. The case records teere collected ife ; ' , s e r t e s i te dite s rte Ute In ,<>' ' DSCOLD i.ftcEP and ICQi R z AMBmmjom Dam 1vim JS upstream OS downstream CL oemo.iine WR water retention NR not reported tofetetonlJCfii. 1A fei'use, active Impoundment iB niurn, a r t e .s"pCi.on'^em rA loaded, mime .mrmr deems S vcadv'fe 'active isopotif'dnem '} tre- nttet-iter M i l JM iil - ssRnf s CST evdoned send te CvV n>re vrnste fe wfefeiF R mesfilt tenders, Cacgg 8! Rope .rmtebi \xy 8E seepage FN fin.inoat.osr o r ove^opDsng ST Structurai fcu eaehnnake 148 mine subsidence ER orosion y uro.r.nvn. or n r net reported % U8T O f fA iU h ie S DAHS FOR WHICH IROtOfRT OASES W f RE COLLECl FO Provided oc the pages feat fo lk , Dates arc in tee format manth-davatear. fvnt Sommsm Page Nuafeem shewn In ten list refer to Section 4 "Brief descriptions of the 21 cadent Oases uoitecteo. C Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 85 of 145 ED 002061 00172724-00085 I'll II 11 II I 11 :1 - a I !* g B I O 1 i I: F nul 11*11 ? S H. S f 3 sP: K *l g 9< ? ? 1 B H .ocUi fi g g g u Is II I * I &i JK vtf & : .&: tei ui jw.: II I B 83 3 Su d! 3 3 I S * * sc *^ w f- % i a g :: 5 ! S I I S S S s s s j g ss c- I i il St:. I g t; S 5/i I SS I D SII I H C I iy I m as s a* I S a 4- , 5 fM s c :tt a C. SM s I ai s I (Ti i} X:?- aa s ?^ aa S i Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 86 of 145 ED 002061 00172724-00086 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 87 of 145 ED 002061 00172724-00087 Il P I 1 8 8 & <BP%isgXP.&g0?,$.$^&-- ::Si i i |i P 1 Xt : -3? O O f < p5 s 1: % S3 < m m t t {VJ Jv s 1 f P<s 1 a 1 Se s . $ S SPSsI--. iP? ss$. :r5 $a2 2333 PP Pp a g| v,-\ QD KPP> . P c< | P i| I^ g l g8. ^ 1g |. 8 hP., 8 s. Sga |. J. Ci. 8 ;PS '& X P ^ ^ 1' 1 | ,w< W W ^ m. m m p P yV >*, >*. Xas P a >P K? P X P PA"i PX. Q v Ci * 'i P SC PS P . 8 " Pr O v'SPa Vii w.W?.. P d Ph * & XPa si vj PJ! 8 P s>< JCt v- 4P "* UPS SSi PV.'. P P S P 'w . v {{{ T * V. P ,4; .j: P iw P "P. w. si: P <C jj 8 M 8 g P P >3' >33 5 " XP& $ tS: 'P&: .Ji P8K iigS;: pP 1V-V <3T <* P p iP P .v P :t?i P P P P' P P jP vy.' 33 PP : P{{'a: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 88 of 145 ED 002061 00172724-00088 Sierra Club v. EPA 18cv3472 NDCA 18 Tier 10 Attachment E Page 89 of 145 ED 002061 00172724-00089  . IllsO 1? I llw II I i I i i i I * I ! i " 1! i l l * I 1I o a SI J isi' O y'v xf g S I g g g ^ 8 g g g UJ: II II m Dm i i h | s i s as g S y : * t & g ! S I I | | | | I S g g If II g If - I , ,1 1 l J *I| * ' | J S I I I 11I I1ii I f i ! 1* fhl f * % :I """ * " 3 1 '1S. I I I I I in n im 1 1 if* n <f C- g s il g s i i g i s s y i l i i g Sierra Club v. EPA 18cv3472 NDCA m Tier 10 Attachment E Page 90 of 145 ED 002061 00172724-00090 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 91 of 145 ED 002061 00172724-00091 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 92 of 145 ED 002061 00172724-00092 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 93 of 145 ED 002061 00172724-00093 Si 's f #11 ft I ! 8 5 f 'i$ 0. O i $< <$S O& Q T. $ I I I S I ll-.il ? i 1 I || pI s * I U & ll 1 1 - &} iii *" 1 1 I I I S H 1 8 :! S 1 I I I |n I 1 I 8S 88 8 I S 8 I 1 g I I I I I1 I t 3I83 I ! Li:s? is P: i l 1 1 i J 1 1 |1 II U l l II l l I i l I i \ -1 5 51 a # 81 88 8 I 8 I 8 8 I8 m Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 94 of 145 ED 002061 00172724-00094 Sierra Club v. EPA 18cv3472 NDCA *14 Tier 10 Attachment E Page 95 of 145 ED 002061 00172724-00095 Sierra Club v. EPA 18cv3472 NDCA f :S Tier 10 Attachment E Page 96 of 145 ED 002061 00172724-00096 fil T ,, Ir: i? 6 II lili Z f I Ot " if d &ill <k lili s li s ss g 1 1 ls 1 i K <> ~-ss 1i B IiXS' K, O-'Y- f'~ '* & w m & Q *S: 1 11 1 1 P S 1 B II <N SI Il f f1 s! g i f Xv- d i il 1 1 1 B BB S f " 1 i 1 I 1 11 1 1 IZi I ! I p if b n. m B &- M & ! I I S I i g g g: g g S I Ig? ^I 1 i la i : s % t I g S f r l i I I i- il II II II vf a- H 1 # I 1 iT5 I I f II I I $ P t 1 l S 1 <V B. I 1vV;.:'SK " h'- , f I i l il m B 1! s . B- l g I l gf m i? Sierra Club v. EPA 18cv3472 NDCA 9l> Tier 10 Attachment E Page 97 of 145 ED 002061 00172724-00097 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 98 of 145 ED 002061 00172724-00098 APPENDIX iocnprued? brief m m m m m t h i m c a s es * The described cases are those feted in Section 3 of the Aapendw. * Organisator. that coiaciad the case hsstariss. and the corresponding incident Nos. ere feted in Sectton 1 of the Append*. * For Abbreviations. see Ssstffifi 2 of the Appersdft * in ! >* sarnrnagoe that follow, the ingideofs wars sorted la the loi ov sen oiCei Dsrr< Typo and for troth tftro Typo, inoUoht Ty*pe - r d for each fed fe n "y'O hwid'oe Lease o-ri tor o.-! o ncrjeni be so Deft ! rso.doop ft roverso ehroeofoglcil order {meet recent feted tiret I Where no infero-fton se abatable {NR or U). the eases era feted et the end of each category. Incident Sumroener rruvlded o~ the pages that folia,. Sierra Club v. EPA 18cv3472 NDCA 98 Tier 10 Attachment E Page 99 of 145 ED 002061 00172724-00099 Ud CM IDSI IW I: IA im m : \ r %M>ct- * i Ud.d! Hasp PastyA&e Harne: fee Dyke Mins LsaiHs: SallsvaR aas, KJesbetiav, Sard CotesTsfeta i!ld(st5gssType: Dm Hesghl {sag 3p Pas Type; US :Ps RU MataPssfe bspottadtaestl Vafeaae (Oe, aesp Udidat tssC-ssajiioe: Date; 25! Astgasd: OPI IsttbslsstaTypse (A Om$s: St QssasttkytsfTssilsstgeIddea-gad(Ca. sa); Tsiittsp Havel PUaee (mp' Ietdetsf Peser!ptlsKt; AHaglfesdlOCfettegtsgiaHagdyke J,Ha letsg, failed feg rsxad! slip, A Ifemtdatsss etahatdssttesst ttftsfefsstgs: lead be beds la IddI, yyyda; sasHttgdykebald Issfl!25, levaases>ed igWfV Viiii;r m hm^y cion ipipmvM wM isn & s l w z thought 1;> ->giiijss- xts i?sCtS |wm pressiiTSS <iMdiddg $% md mrnmm .i;-g M W|;,h: cd m tm ; &m b b i. u\IMvke, Ou s i Micxc. Cr a fern, ease ef famedlal tserks ssvet a tststiso CaredstdaIIsses> Seyeey: Cfedtstees Life,, Vsssseaesvai, Ceeeee Isseidetst Hst I Id DstsMlstMas; StossII Mdse Leesstle; kersydlte, MD, U Ore.'Tesllaga Type: aasd &: gravel Dass Hdgbs (Ml; 2 i~mu Tn m IIS Di?m K l! 1te .O-Oi: bpastmm 'dstlases(ett. m 74>000 laets!Oisi imfiwm&:Im i Data: OB'23- III :Socolorii fC :\h c Midm '.SI Qtseaiiiy o f Toi Uog%. EdesO j: to f oStOOCi keeyei&yi h m d DOIOCi i n}i 100 laeld m i Bm ttiptdm o f ih il logo <eor in progr0471 WOs: sio^e f a ll ddM.:hd die mMu omo;M 007f ; oo>o. k l. The ti&y-i?V :st vaW> ^ \ migd dom : m i:S iei S o i m 'b t e la to h bvs:M p&t$ pfOtsmw io impd-.md by he fiibom tiMYi' Y Ooh'Oii Cntlm Is:?.o: 0:3'y 5 bxo [00oiloo t ib i=.Ti>?>5'dTi"iti fi1.1b f obovi:- -0000o! poTlgka:0:0: tmr M W MtW< 1s'hO: loisiop mmIM btezkd & tfook OOSf iho mihmxmM n$ creol; <11borge,, kmdP.O'i^ :oear. asss bmm g Misi diigeoobi oo ares. o f U si''s '< !1:0dirtookis Md- S0ii.fiMc MmMmb Deoi mNTl: K,e&# l Dd Cydbese Me 212 PeatUMtsse Maaset:; ddev-,::7y' MmeCssetatse: SCssssitetsfeas! festste,Weste Ssbealse fefsla: OfelTsali'ags Typ: sssklsjatsa, alsy Dass flelgbs (ses); 52 DssaatType: US pssstsHltMalsrsal: Aegdldes, sdtoolte, leas,elsay- feydsttsadeId! DyyeeevyieyyekMaMaSte(Ca sa);3.3v:; Ietsdesstfssfenssitort; Oyly kdd-1b::C;es ltb;45 teddsasType: !A CkiKse: S:f lltssssSstyefTdslfesgRlestsed(ess. ass): aoae Tadlegs Tassed Diy:yyey :y:} Iatsetessl: DeeesipSeal Stader das klm fefgfe w! b SSSt Islgfe t e fi. l d/&& WOiSbdlog pkCM 0Mmi kyey.ee imt b, te raim hm koghi t S3ro. Ritadopal \ 0' IdgvA ' e. Idsa 0 u* {21 st'J KTM> Ci Is<o>v d te al " t t s* 7 4 -M ts.nditt''-aa.s-'.,'TSd: tn t s :, A dd P -A i- ! ied U'J " ,v rr # ' lm, 00 *c; Vmv -r-oee mmV bf 0'P, ir }m% <A ms%ddi<idildhb 0- s d *y ukoo V md Oog M O 0 ro*,A' O'O i m i. < t' o' w m m* . { '<L& i <t d id' , ' td,v el , ^ah\d.Xj %' '< b 1d'i t^ mAj c -r'f><'0 hoirie ir> 0 7 A r*% OeoiorOU bh>mmJAeMMtaHeN,etm.;>g,g'v.hitMd Mm. Lmdffii m ffelsta OmTmi Base Meigba (a|: 31 MasTg|>e: S; (OamFUI Msssdsi; ljpaaadrssef lekeeee dda. my scsbessi a!a:saa:*>!; (s.7(. :yy'S-yyy ry i, -y s<,r - sg ... (fard,yyofTalllagsdeDeeed(yy a(|;2,25!) Taslsags D'ave! Diiyey.y (ses):: I aaldeesl Beeesipiiasata Sleeked restai e.yeyed pery -yeye ta yye yy: ttsgfe, eaassrsy tail ai dbsvaettaas slope, Devyykyy ttf Si brassed satsa! attrape :s asasitaset: Sssssteeet ICLP alilsags CaraarJsdee, Speldetst Hee Ifl Past/MlsteHase; b;try; Mtae LoeatloS: KdrifsS: Italy OisdTallstgs Type: fsassrde DatesRelgfet(tt): 2K5tspgeeee<51 , t , , y i ! ,g' -, DasttI s:I MSisteslal: CST 99 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 100 of 145 ED 002061 00172724-00100 ImpsumSsasad' Votene pm. m): MlTSSCSO i t lllS ljtt t:i*::t Si'J-Att*:. \ n " i ! -, S ii"' SA ' S I'i ...M I It) " Sii1' ' <! M, t S<S j tti 'S !'! I S<V S i i be? iit'ff,Sp A se t ^p at-. . A^f, ' t\ t ft p ,,' tt VJ w ssran, 2 i '(!') de ip rv ; ,d " J i n r e Ann ' it"* >f ii>* -S TH-' 'iijt t 'jj , I ,, h'a " a s : A s es -i >,,t' . 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Rj.iia ; OffTssSSSSai l i iti: ti:> iti;tii:. li t i ; Usarsi: Hm s:Sti:.)S Draa Tjtp: US Ultras Fili Slftterssl: HydsaeSk; :US gprssi SssposasssSasaes-sS: V o lte Cesi si)s ?,?,SP.1 S.KM} I i i t i t i i t %i; a ir i! it i itp; Usarsa: S-SSC:Hiis as OSaCs SmtSetii Tvits: IA &ma: SS CJtiirsry tss?tasisssgs feSsssaatd lets., at); d.SSTSSQ TsasiSssyi: ) ) ::;it:i Oaasaae ttitit: S.3itti; a?tii<iii' S S n irip tiiit Tbe iis.X m f i wHi t e d hv it e siiraBy i :'mlk5? .rxlsa 1ram aiix r sir b:S7. ?rs. xasi m 4 x id ?T m wb sry. ? m m tbr Vi2lay xd < brerisxr 21:sx rvrir . &4'$x'nng nvvxna b rinfier x: t e idmSfS' Up ix 2t e g m&x. y?kItIs 400rss arsd ?ikrss bM'Sg. Primary rii jm x 'rihr ari 'if fechssybsii in pari;nim, !sydfoteispii.g sv-yrkss atriStg:sj p<;SX'S 0 Sasrssti> zhlWi\ ?i) :t e 4. S e rri c T " ' l T) TsiSSsstgs C o m te te , Sritiirp* S i! t-' i et) S's>si tN-3 TTiS|a.ptUarsa, Sii:::siti -!.t:::i:tIli Misa Lpcasisra: Tyrosa:, UM : SdSA iiii'S it t iilii iv 'ii tttt'itiif Dsns ItelgSsS: fss):: 66 Basa Tvps; US Dt fill Maisriiss; C ST Saepiiysadmdad VdSiisaia lias, s:)i 2iM 06 i saldimi lisfisrtsarldm Bala: SO*S3*Siici, sight isasislssmTypa: SA Caisse; SS Oii.a.sii' !.. S,.i.,.11.-. UB.:.,.s a s ', SasSsi! -' i a J S's, s u a s ssA: ST) is ttiik ti : B ita a ra ia S ie ii Si- !'!:e"!,e">.">! ^ '!" !<(! j''t'A ,, i b i i d - s - ' t-,i > ,p Ji 'p s s p - 'S ,i 1' i y i i j , ,.y , n p ,,i isga a r i si-'Sarie1, \ a ,>i f<sa -tSV. *< 'S a i p a a r J a ~ sr S 'a " rsa s 'a '-s j " S *. ' a i, i s , A V e - k d sS 'ts St - m a s s a S - r d * - is U B i l " '- " t S v i ' s t S ! ~ e i ' s . t , f S , r 1 , Y S i e v e ) ) < 1 J t s a ' s a ; s S ' t - v ! ' < ' ) < K " t : i i k r i ; ,S,t tS i t t a ! a jS d ' e v i e t s p s ) ' A ' t r ' - a s . 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DirDrssae (D: I |iSSal SAtiadrtspSda TUSisaga gsaaiSaiitad S paiaiipg isf tara a i tsaards Srr iSiraearsi, radiSe iisnS ig im ea r dspciatisil Sar ss sraiaeii-isai p ii Tire pii ixsllosar te tx id u$us ii ai n. :P--4 dssgxy tete. m degassdx:m a i MSUffi by d;tSv:C: spignttmi gmssetetd rsam s|g: 'xrssxt ii:fd S>t bis xi m i |X's>|.rrssm Sapirs ili im tm itm bebixdj ixw kMi: This p m u m rsssxHid. m Bapxsitkm nfUSllses ^h t e d:lk;s:.X, x teiltet xrssdgrs: dia,a disiar Ss 1-b? x'srs iXtebitxsf i.y higb gbimXi iisrtssrX ix saa iSska nxrsMmg b'om msxsab siud klgb gs-in <\ ktV'te . A stirgrr !%SilXZ. um. yyisr Im i stmwed te te ix ir x f apnumXf at: ite .te x f ite gii dicit-lyp dmrrxksm imrvemad S' sasSssgs ai:ai sadd SsidU vii^un ti; feited apaiSX. Sida issaapr dSSare Si SS:<> bvius gar mibaixtSs und ir ww- missyJ.xttstd tei 4xr pm t ptmmsrm i:js S/crstirte e &ym IC Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 101 of 145 ED 002061 00172724-00101  a Mie tsslstafs er rise ps stoor lasiessed !*s|aeJSs;siaa Sears#:: Wlsssms, |f'/@ ts s d g e t N s x : :M I s j \ l a ' \ r s , S I *< ' M i Ml 4 , n # w : i d M 'a a M S s s ` m j s e , e ' x s e s r Sx a e e '<a<-k:pS s,a M :Vrr '*e \ Sj , ' ! si! M-s.a ,< T Ja pi a ! V " a a > s, . n s m:isi5i. tmtiwi !>.*< !' ( # -a i J, s J' x '> S ! \ , !i` S .'MsS"'- <t i Si SSpi KUt'AMi a'!! an J, Mi' U , M /> T 5 i ' t 0 ` . . i - s m : iittfoit J * s .? rrS i< : t a s f i i'i -A V* - 0 < 'm U \ v' ' *3 <"i X 'i J ai i >' ` Xi'1 a ' <' f ' 'i i i i ix- k i .< > t U va w i- ^ > \\/ \ v* >\ xl a s> ; W U W U f tt * t* ; ' i sas t s r 1 > ;\ k \ U J ' .'v 'V i '1 -it ' ' S x t i i '1 a i- s K s J, i '" i 1 i \ JiS ' , i >'i i i x < i " i ! ,<s i l . 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'wiit A r Itl Ui 'i A Mi t'i P ^XV f <j VftxxxNxi< A* X"S iislsa A/, x' ' <' i, iXf / ! 5 ' ',bi t t \>i < 'x *' :m >>/. i ', 'M t '< 'A t i '<x>'i' ,<$:<i 'x i" x '-v Si 'S1 S- ' <v< ii KtJt 'i i X t* ^hx\ *\ xi > ' Vk vt i < x. >i \ i ><x h - , it 1 i i Ux< xSJS v<.' i r<rMx* " r ^ ixVx*' 'Mi , f ''' Xix4 >'A i M. "v^% i. ,i 'iX^5 i\a x * > i 1\ - aitx" *'1 , ' {'P x X.< Ji,s r,i,i Soir;: Sraiaiss, !979; Nerlls Carolma ept o f EiViitJi ftesllt aSit Mt te :,( LassSQeatS Seejiea Meisters# M,s MA : V :;* ,i M -s S ic : i S is t e l R e S sa-,.,- 1i;.;':.' ) titi-JSagSSSS'S tiS,)USA >V, , "x I ,', i eppgS' Di hs st:m5:4.? test Tpst: US U a 5J-MJ V ,,a ,, L -iaoHasSHsiiS Vnnnn: is::,; as): :3{i33,KMJ Messens lesersrsetseas Uae ,a~r SanSa, Type; IA t e t e SI tessrssisiv m laiJasgss tesassed tea, sa): 170,008 sa i p . . 3 ; : i i}: 33,MM) saessseas tisisanjsisess; !'* a i a s s d e t e ; a 5 , j d i a x a , ; ; s ~ ; J I I ' ,a ,' ix - , . a ! a i I1 a s * S s a . a s ! ' t u t U S; si '1 ( x a , s > i e < ' d - < ; a p a - - , r i - s J ; i a i ' a t a a a ' i , . a , ' S i a s ! ' as s'-. V ,1 J t a s \ x<4* , \ U<4 xMx.i -0 s -.s) >' x' ,Mvv x" r <?\^ ' a hsJ V, ' U f A H' i h ; x'M- f*4'" i f i' J{xii' iP <2i X V*'x E' "AJK< Sr <4,xn$. i'iVtV'xx^ ' '<-x' XxS *4, x' *< rt .>{ + X'ii A't'v i' Pi 'U , xMh NA'l i >}>< ' N{v inc <**,'j* *reah rd <! h# asj amlia ri . . x - a r l ' i , i v fara> s s a i a t e p e t e i i - t isJiia , a s.-iv j " a g s<, a ,j s \ # s \ aa !; r as J; 'XiSi-x awssy, Xsassi E: A A A a : r::,. 3:33::: :::, ::3/3, t.a:::;:, :S3: Jarali-er : a,a LnaasPaas: Naaas: 3::v M: aa Min; teeaiie: Basstes, MZ, USA JSiJaais Tvi:!::: :::n:::::::i: I aa- - ^ ` p r, i -U Oifi Tps lS !*,, ' M,ii'a'S i JaspeassiiereaS V>e5es3:sg (Pa, srs); i!!i:iiii:'i;:JiSi :ai.:iiiiii Jjese: Iv U e e tiP ii sarideal Type: I A C a p : SS y e a ' ssr l elass stelirgiseil |e. m |: laeaspa: Ixanssl S. ::n UM 'afaS en iM ^ rrs d e a ; S le r sasraasv ssssspg ss 5C-fl seeSlsig :::; 3;:: s s < iiU ' x v .x iaslare je esear, tapasbllSp x fVr- i i 'pp ' pp rii^ed U;i MfPiiiiior ''' V' \ x, ' ;m aii a lyoi , Px^i U1 Ni AAiM; mr1ismlisrkmmv. 20 y ,'J A 'i A r< >i ;'ig |p;.j bs?t pTeapa pr? 1 1- iss?ass'. x,,' xi* ilm lCiOP: MbO'O loi xi lf?< P f.Oit i t . Mil];ftg' vOvprtpj &; v^i' 'f> i ' as ad a io:m\t%uiM' i^i fi Ps' J *i U-> S \ xx Mi P\xiU ' sggki pyp >x'x;t xi , x{ ' \ i tPif fcl:igdooti ! Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 102 of 145 ED 002061 00172724-00102 Tvpst: ehkoeky Pan HckhM'ro); HI Ost Type- US Datt Fill hmnrish T irepotsdtseol Volesse (en. m): loeldee tnldrrtrxiloeo Date: T/0 Inebiem IVpe: 14 C ^ e : SI Qooebty of Tsltlogv Released (eie \}:< i %J) Tailings; Toivoi Disinone {MF 35 loeideed; PesiWtpdoo; Skrpo Ikdore oeneesod mioiedlskdy &te conigietieri o f s perniiete? dshe tu ras e the ombnoMiinot tod Allowing a gerind of heavy rniaudf lhah poro: pressenne tint! aeddkM cTibe pethtieier dike hid ponsddyalso supptesieft od: Sy viborbonv o f cetiMrooiloo niddeoieotv ero: lbneghi to deve been cooiriboooi fk'ioro. SOe:urer.: Rlge liieldent .Nat 220 'OMiihViie.Nsree: Sgasigind M('i' ' ' Sor V* O, D ! >t i OreD-tshegs Typo: Lesth Fsmm oopp Dorn Hoiht (m); 45 Typo: OS Doro FIO b k tonoi: T hiDeaxaeoteol Vnieiite (es. roi; S2 oebinns DifesiHorn Doter OMlUOS ine Hoot Tyoo: LA Ceuee: Si QoootPv o f Tediosa Releraied (ero s Tahep irsve] .Dinlenee ntl: 4,000 Iosjdesif Dsserrpdoo? A rise Oi pooo 1inve dvtioe ! sloys s i iiway tiun?; een&ed e. $u rr loss o f sDfcilisy of sfa Paar sn deoePctloo n i ;ke uhingVv Irbaagii Usarisa :rene. tot overtoilipedi-, The vmv aasiav,;;: aaii o f legs I :ksa siawriUisiasa, ws 97 ieCasss. f i saoi stesails ssa Sasllaa 6 , G a s 6 'T U .a -" f .' 1' 'a i' alila! l*w 54 BiSrefNtmss N a ; OsaoSvIai MN Loearisrsl: Spalls Rissa: Ofs/TasiUap Type: plis Bara Esigi far}; Cas Type: US Nifffi Pili Mal); T ipaasN!;Vate sea sa): aldassf Isi&faiallfiiss D::::r: 1966 Si>idsTypss; ; A Cusi:: Si Qtsas:is:y o f TsiWaga fNleaaeil {, mj: fiailasgs Tais Dssi o (mi: fMzM Ifasenfsl;: safeaaksasir stepe fdere rx attend idler o sofsasged paris! o f s-ai wsno wa er eoinrrd the sags f;<iiS:s a noeRisehetl Ofon she mfemk*! arasi APot oon deed o f ihn irp s w rasa sssmsasa venre lost ss din nosoiog saga fiawallSa; Sa; Bsisaklsaa, et al, 976 l a 8 l a i- ! \'.w- \A5-a ,, ; 1! " Msae Casals: 8 6 8 b Cefisasaia, t a m ia raslSiilings Tas !? Bar H%lii(i}; DasTyps US Barn Pii! PiaSanai; T ipaaaslsasrsR y sais; -ras., a}; !sfef 1srsails Bate 949 IssasdesilTypa: IA Ciias S QstaaSSy s ifUaSiajf IlaSsiaasi a, sa); 1,1110, TUIlags Trsvs! Bisa Cs|: U t s li iirsaria? a: m s m/hMmai t was >soreitrtiei nd by diteci vjolytslthig o f laiiSlsrg0 OS:big opt:Desili mdlng pote{odore:n The; fsasePssl:re e be'assi Pr 1kav eoosisnd ni levt--petoteebdin g.hSii! liii Ihn Odiorss Is eoeibo::sf 11o f e fido4' ` 6 slrras Ree desi;'%Vi period e f Itigli set.voiel ned sfnieg tono i;h.sl tois'd1ite piovohe suriine and us.oste! ?kpe Instikddy. A iai'go toilioga- doweide IVss. pigg:0Ted :tlOt m tveli Olive.t. ite .eppijitnody: did sss rail! lsr S i Mary 1& t a. Ssw sssiiss: awy, asaara l;-aa:a:a of aralaa;al aasaa bsasisaf! a;; lisa Now Mia: mass. Sa: RaPlosas si Talaatl, 977 (its ;;icat N,;: 69 QjSi/Mfet Nasa: fCsasii; Mi l ;.aaa:a'aa Gaiaiaa UT, US/s. OrsffaSags T ca:ppf Ua.a'i alala aa) Daa'i Typ; US am f ili MoriN; T l?sptt<lsrai Voi: (a, sa); slki 8 1 1aari siSikail:t: Dal: S99I iacisaS Typ: A Casas: Si llisaiii.isy sai ;s:la::aa .iiSs-aiaisl Ilaa sss) Talissgs TmS Dalaasia ; as}: ladsisiAs Us'iiaaiiiliais: Sreish: f lire: aaaaiia-aaa: Iggasad a a;iaisa: Sowsda. AaoU isSicais sSs raiaiil stieg ihe faiara viriah sssy fpsve sawsssd risisii sisisraly, assi! Sras "astsasra ylisisisrag* :asay irsy aPaigp: s!: fa a asa Slelasay 196i ; SmiPs, i 9lSS i,<aa-as Hi 21 Oaia/Mia Nstne; Cagli9 Bai Bip 6 . Misi' .iaSiSllssl::.': Affi:liill OrssT ailigs Typs: appen P m foigl fs): Basa 'Typa: US O;sar H Mpede impssimdisens Vo. sto. mg ! essisa as!iS Dai: 929 rsesr05:1V:te: Qaasrtily o fT ^iin p Reivssed (ne foidr ^ Traai D:staao*. W IsaUr fe:aes%l!r 102: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 103 of 145 ED 002061 00172724-00103 H>$ dessite o f fcs fa lte * a; avallte, bet i t >'.'! a. ; ;p f.pe seisesd bsflisigs were depekeel le s sdleesi dess' sed w m *& widespread damstge so twee flats sselet 10 miles sfewaswasstm, I li,,SSi tie dt oas Host to ;'' : c, U r, I si tel `e k sssp-a.t, it"'s ii Vk-i so; i, ,s so Stmree: Ash, 1976 Issesdese ItHorumpos P,t> teuteo: ose a < uw ; ' i Issclderti As : i :0 Dstsp/Ate: hissse; Simmer rserl Isssk letloa Locadas: Souiit A ltea Os*Telltes Type: gold Dase Haight; (mi: Hats: Type: US Ut f at i teapotsrstlsrsessf Veame fim. sb|: teisleot Isidrarntles: Date; IS37 IssetsIsaSType: IA Clsaae: SI m so t's >f I slito> f ,ir,,,,o t tsts a sse,- ,.<-w. at',,meo ais IsB'dteet Pemsipttem A stfae-a (set- u w .! v 11 0 \(ed k k : Is n d e i.k :> ta ;1. rad so stark ear:are. ateta -si-s teo,i ; trad asa,aerar; dre: -tests s: ss i otgte somsr o f the tatliags as;'Sashsics i uoaree t. sde o,d s ''L -r tey ijasedav o f Talilags liefeased fee. m>: Titsflags Travel Ddstsmee (sn): Ite d e a f M,t 10,0 lUehleef (kectepHaa: Dam/ear;; terrsae: idradar:;Sed EsshadkSiSsot: hrsaafe eeearewi a te a period o f Mis: losado: tt:a: seal Stsass asea amstlsessesi fry eswaskdoss:, The Os'Sf?alldigs Type; taihfsgs fiewslide (reeked a cumdetele dkiauee DasHeight Cm): Pam: Type; B8 : sad tmgoffed at mide stats: Dm Pill iVttersa!; MW Smwee: OOsmidssm, at k , 1970 Imgotasdmsk: Vofeme (ctr, re); Ie Hiferre Isaorwtass;: Isseideot: tee,: 213 0 treated:did Nwoee feeereaerdkilo Mise Locadosi; tir Oat Prcas istgisway, a te dors; Hel teiommsile:, fipessl Os'e/Tadtetps Type: loss; Bam .Height (a;i 40 fiaos Type; US Dssm fill Material: T Issyxrtoidseses Vtslutae f eo, ns): ssetefest lofoemaHoo; Dame tekdorst Type: iA Catsso: SI Qtsaodfy ofTteslspgs Boksrsed few, so): Taslmga Tsssvel Distases (mb ;teae;e: teaadaaa. Orate:: | A flsrettS; 3U I Qoaetky o f T kikgs Heleesed (ets, m3; tetatearr ddared Dtetatsee {m}; Ismlrleof Deserlpflo:; Tltc cpstaasro etadsaterrseot mas detsig solsed esa sirs aetsrssfl slope o f 4:1 he sisrshdsetdtg perlatker I dikes o f hauled M l' kskdsihy o f The ! emhsssikoteol: met: tsteddtsfed: tsi viSrsStotss I peaskeed fey the mdse mitassd (maspasdlog oad [: dssrapfstg peshmeter dike (sil. Tlilogs feursIsiJIsig t resulted, I Sotadee: Cssaggseasleastd Ikielt'ets S:d: loairlasrt Haaerfpildo: fiases dad aor bees; raised sisase: JSS4 . a ecatrai I fsieideta tek; 139 dyke had Test feylit is diside the tmpeoadmsk. ! PemfMOst: teeeara: farreree;;.;de;a Taildigs tees ptsumd so ood wdsile: the Other I Miae Leoatlo: Orsak Afriea drakes! sod sided, Dried ddlisgs die dug out: aod i CiasH'klsep: Type; pdlsl alaeed sdsawfiare, A (le!; asas oe the erees .and I Sam: teklgltfs|sa):: Bern Typo: US desame alack k she mad, T othess: seat tsi helo am! wits! \iHis g S?il; rtea fi'yr mmm Tiw crest wiei 1 =i?v& is:: tails il y wri phreed i Ihit i dersp w U 3. WWt ssgsdsist il. wT k ; ': iSOOf kktyosf A 'ST>d m m WSs -mw Idtea Fill diedearateT isapttoadsaeet Voltstsie (eu, os|: \ laeidestt iaf&rmssllss; I Oste: teateat: Typer: IA C at: SI Cteeeaay o f Tsslksigs Ifeietutetl (etr, m|; sesi the s;i:l iv bihgiii;>ry Svl h AVf:tw tmk hees up lit valk y : g \k$mTied tm m m swept dt 8 i n ; ; vsiley like Wit!:m> m Si Tfx, '$ mx:: WS. ! osa J .{in ;2,;|Fe fS :idml mk>o 6 ,, Tearts- ICQLD Taidsip Coassolttee 'AfaIswlklupwTirsavsellul sDlrlsisdtestsl ewPdtres{il:by s tom m m l\aneltlieheid Iidmescimriptiskmest ttew ii^ n c tx n si esf tire teikaed ilm Tiw slid ww- -mimn m lotge-ierm retest:m i w:i:T an 111 eut surisee v:ww$wi' 'WtA Hsetedsmi tee,: fed Pam teke Dome; UtuikMiffscI m m n vi^ te xpc-aikr pstc k c m %mih Aim: .-ote -mlteiMLs' IIare foetid: 10 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 104 of 145 ED 002061 00172724-00104 U te Te IT IN. NS iPS 'j H f I i st c c > r m m , vp Jgeitlsai Pimi 7 PaaVNlme Name: B iekiag tese ,aeititts; Smith A Ste QteTahags TSN*: piatem i sm Bigiti Ntt); 10 Piti'ii Typas US Dam t i ii yisietish 7 happantessi V o te s t e fs): 1U00 Itehleat: iaferatM issi D t e SEM- isste e tit 'Types !A Cassas: SB Q issite f Tslhnp Estes! es. rs): AteLUX! asligs Traes! D ltee ist): 4S,0 te te s ! P esrnglfiat Mie UV.&a itltite M ite by amuuumuu4 te aari s i':'ig m v g h Qmck&. Es:rihmkiwsat bm m retesa-c o flow 1sttum tim i fiiiivlSSy:i y HVOg: trimspO Tilg pyMgp i ar iloofTOOi'eMK. T m tu-ilPigg haw:&v. ifJUO'PO'iOil .& ositiV >:-huil. idiUO^ 12 m iain ;i.0 IsoiiigSi i9r?9; Rudd,.1979- !.i'SS.v UM IseMent N te !0 tep.TAra Nasse; Berries Mise Lassiste: Fratte OfiSTitisp Tri:::: : ksaMs te ta BsfM tti!: S D n T y p US te s Bill te te s !; R im p l n te te Votan fes, :m); incidis! sfarnaSan: Oste: Ite ! Inside!: Type; i A Citase: SE Qttaislly s Tasiisga Released (asi ai); Tahags Tare! Disiasse Bn): i sea l i t a : D e s m ie lo ; ; : The Stsie! siTe fije SE apsiiema ee;:y::ssese:;: steady feraasked dita io seepage assi piping a te isseey arar Dearsas:: was repltel! as plans ware mate s r rassag te lata a i iidditiem! m by psinamt niedsods. es:rasa iaa;:1:y a: si. i IT ; Ite d ls A NiM ! S4 De:;:;11:ise Name; UsoTssasserl Me L o te os: TX, USE OisVBiltUpga 'Ties: esse;;e;s Date Haight (iti): Ht Data Types US: sie:ss: IS!! Material; T :;s;;:s;s;seS:e;;:l: Vsslasssa (Sa, it); irettesi in ta rm a te ti Dal; I t e Incidinl Typs: !A Ciase: SE Utentity cdTaiiags Retesad (ea, m)t iSMXX) Tes!itip Traie! Biskiaoa issi); 300 Ineidont Damn.:; : Cipsradn o f the iaipamsdmani began its !)E>2 wbh ila lonsracdsn o f a May stiftet t e a satai andaaliateg systats, The. tallara ss ateritdad io mmpugumuiiksdskuupittg od pulping Usa laidite: m $s o>o mvi pvugrm:Sd mEi lireac f m os'obiis'kmmi um iss.ilinp haiysisdsg: ummnud, t lm siiTbssgo :yySOIS haiieid les Isav burn mv&utim d00' io bBaCEclo&t po?TiT.bib(y mEdo SS-d. SMVUi- Khtaer, DCs; Li:iom, B1 it e li; .; : M e ; 25 si;;;;s iili ite lesesie: Clasltl slssses; Mina teeaisoa: AJC, USA OraiTaitiags Type; tepes Dessi Baigip ira): PateTypa: UN Data Bili Matea!: ? ieipseesslses:;;. Vslraa: le;;., sa): laeldesE lafarraiitlasi D ite is;:;:sissse Densa ;A Csesse; I li Qaailsy af Tahrtp Rtastsad ca. m): 1SCyCKIO ,i ' t e ' 1 , 1 : 0 i ' t ' >>o !a...a.u*;a 0 asaripria; Ut D ite s f a sani tea- oeiam it sfa la ssasasssaas ersea;se: astil high llssersl;: :::esei:::sesee TX paitad saetta in srp a tiiid ntiny pamperi va rilial tes io rsissave miemai drahtnge, ileeere esft-ae; ioni) DAM TYRE; US IN C IB EH T11 TT: Id !Nt t u r u r i t,i ya fa te t i No,; uni UrntyMiis Nisrs; tfiyssiir Mias Lsessisee: Mtsibeiey, EL, USA OrelFaliMp Type: gypgte Data Height {sn): 2 1 Dates Typs US lies;; eel RlateAsti: T ta p ria te rte Veiatae Cos, ta): iaetriiWt LTe, et.eue: Dala; 1)112 la a ite l Tppe; UN Causa: FR Qitaeihy a f T ailhip 1;::Isesses! (oti, tel): TselieeseTm e! Ilssseeee |es; |g:iEleal Drecr;pH1! Use seessesse;:; saseTlsisssssie: sses: See;;: m l sail plssesilsseeie etav e:es;;:e.> whieh a iO i-il stsitlaa af the atrsitststete! ships ta fail, Aa arAasowa sfaitahtp pf Eae-pH psajeaas tester aits itieasisA Saarttei AaaadoMl ItteisSeat Mao SS DaiB/Mfee leesese: H eBispr Mims Locapia: C atelli Clra/lliissp Typa: p id Data Eeight (at); 5S Dam Typa: US Dear. Et!! Meeraal f Impiaadmeat Volume Ite m); !araleat Mlprtasst!at D iti: Rte iis idi! Typa: !A Citase: FN Qateity <:! Ilseereee Rtdted isa. m); Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 105 of 145 ED 002061 00172724-00105 ",'d i!;'1' : <; f2 <!i i- ' ! nOkoM Oa-anyUO: b- o-, s v, ns 'O ,</ - t>- i ' a5 v a A s g a o ly 3$,; ,, la s s o m sfe, s o , y 'n d y U y -y Mi, P 0 .taso s u , )d B ia . : 5 ; ; o,'; r { x * "'> <' ' Si ) ! ' j<! m; t , , o , t - ' < , 'kU.Oyg U<.Sx\ i.'! f e c fe m ik n a ,' 1J SkU'l jO'-'iS 1' 'i'S*!!!', BO(S>fJ ,, ,0, - s o n n m>s nomos 5 ;.nd v*0w.'*u ' , i ^ k d V i \,S . > f ,i m n rstl O ff f e ! a stO f e . fe A i Ato b- dr '}- 'i'" , i i`` i >< 5>si, -fe - Ofem i S-i5 rn-SOy, <> i t y t d SO 0. bo.><> 8lksfsgw:kB nssdS:S: Nsg >3 Dmafefe: Naos: ICsssssksss Virs Losfesn; Gaifakf, T, USA TysKv: Dam Fogs Ca): Das Typa: US Dasss Fi.lt bfesisk T impomsdniasiS Valons (so, ai): kirO r-s S5ar:rito Date: 94Z teldspiTypa: : :y noyfe: F14 Qosmtsy o TalSags fefelnssab le, .fe: Tailings aova Idlsinnios: ra) Ii.OO**:. IfeCufeoy. Dh b:a;a oms ;u;.:fe by ybyy H k isaao;;); fendgfesm saserfnls. fesarsn: 14eIver, 30111 o v v a r u i ' j a m v r TV'Pfc & I V U k f e C M f e S>< lAakkit Na,; 200 Ife a fe a ; Nasas: TD ? Vtsns Laeoilan: Calagla, Zamsa m T m lh ig s Typs: sspjnf Dina ffeigstra): 5 idans Typs: US FOI Mnffesd: T and E k,yr ;> da -<V am;; y:;n. sal: Ai Em H I a uso: :k:: U f e ',- :! i\. ' ! \ . SI, r a O s a k a ; t i F n l i O - a g ' | , , j , \ T s > )<!<- S ' V I , i , , g ' I ! ( , '! 1 S S', S X ' I { ' ' kivjiii 33:'::)' ss s. S t i s1 a, ' 0 ib , t >s rtH , sa o ar sa.ssas J-T vi'sur ku i st 0 -, <* 4 v ! - , i l S a is ' ! . H < , s- k < f 0 t> \) S !*>'<* H U '' S, ! !' 0' s>'b Ejsi.'S Acaki bm.: IFF BsskIM sOs Nassa: iSisIsfcAlllk Me LpkaOok: BsAsanda DikkN, FL, USA iOire/Tssilisigs Typs: OssaHas Dass FlalgFsi {ml: 12 I);::;: b y yo: US' Pans FIO OIsOsEssl: 8 llapksaassi TEHm t {s, sp): 2,3S0,0W Iat'lani FsiCarftrallPA; Dais: 09-iM 088 Imkkss& Typs: IA Csssc I3T Qi'iyy c:l TaOOiis Pa-kaassl ni):: s|,AH3 Tssimps f'.s.H OnnpceCm): lasnfeni iUgssnppIpA: Ths s;mbasii:eni w- rslssil ms.0 slay g|| svsr laslngs sislsi s i 5a phsspbaik slgy sfiags sIsAssE llssaaicns waablp: sipessBAisk Lssal sOesi' ISOasas asO OispUaassani f yali OPDngs asasSrasl slarisg piisiStesOon p f apsissnsB rasssss. nd Oownskaam aiskastesas slopes wets as ybyyp ns 1,3:1, OvaKappig sif i.Isa esnlniskinsBi sjssusfed itet is anasssivs ssaIst asansSUOidaa yyy^yy Isaasp- rainfall, OvsfS^piog i,;,y pnss Issas: iisiSinkO by sdlsiilint sf 5iss |Xisft o f ibs ambankmsat yosM mm aa safe allkgs, ar by abasa IbOpras na fe slaap dsswsssfesmm slaps, :Tbs ngmsvy: arsasb that m syfe sasanad sil :>) ibs impeandini v,:.st (yr:;i.:: 2 ipilllnn ipillans) Inn anly a ifetsd pnsnOiy aF issbngSj msd a major fkavsllds i)M asa yyyyy 'lisa ybssse o booyyyyyy wss sliylbniad ia boaininily blgb consoiklndoa and andrafend sbaaa smagib la fes fosas" postn o :!::: 5n:l|eoi5bi laysy slfenss dna 5:o noOsfesmags by s poevims l!sm )555oo sasd layar, bosos: AmaUolsl SsialdtBi Uo,: IOS DamfelS Nasos; Jindaiobsag Mise Lasamos; Stamaas prnaiaes, Cbina CbaTaslsgs Typa: nolbslanas: fksoi lisogO |ni): 40 Dam Tyiss; US Brno FUI fesssfe: lippaonfesni Vnfanie Cos, ni): ismkfeni lofnrm ni!s; Pais: 04-30-19.88 5IB:;(?) iygiyy I ypsr; I L soaa; 02 OoasdV o Tnsloga: Rslsassl ya; os): bbyybOb fs.lo-y 1 ,' ,1 A S l? , itlj: kooo: DssssrspiBsss i iSI'A-i^ >k,t kmr !!< o* jd , a i -i(S,r , v<'0,'>' ,,SsnisD jS !' > .5 5a' i- ii s, ,U i i a a ,, i V o>' A -, ' sol V>orss K fJUO l< ,ig j 12-5'rrOka loddans N<s i 21 Dans/fsife o'o Asssss Mos Loooioo Zbiibabsya Oyybbyb-yyy Tyyo Oiild D Iksgbi Cm:|; % y," i's-o;, 'PyalSCrk 5*1! IVlaSOtfe: I dopt, o-sjmtm V., -,,<s r i Mu; f j - TO l 'u it ll , s i.-Siirsi!! itfi Ana d U-: 'Fs- A- Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 106 of 145 ED 002061 00172724-00106 s, sv, A ' <{ ,v * *' ; -a ryiv ' si T s s' f's ^ t H tT '' .i>} v. ' ,', 5 iris' la ,'si Ni,' eso , e s I, *< > 'vptm m * v i Tp r,w * & % >%'s u^s i ; P * i n i H d SV i<B ps'i ,',sj<< ,oao!'o', , O- s*4 , ,,aiSVaaiMSig Mbl *' ', ! r v rt MiHO' uASJffr, Su k> F 'ss'!';;- 'J ,c G alt ki'F arti 1, es'i? iSSJKib '-aorre J i oo , >i f- SJ 1 3i >< r . dnsM NoOs'N Nn.: ISF BsisasMisse Nessi:: iksIdeBiitked Misse koesasaa: Cassasse, Nlesyiees sTreNsydosys: Type: ::;:p;yy: Dmn fla ig k i {s)s Ail Dosa Type: US Dass F ill Mat&rial: T krsgpaasimesss Vslass (su m): No.Niet iaSSfSSSlIsSSS: Dos;: ST4 IsisIdessl Typt: l Coese: T Q u w ty rTssiiPis Released {ca, sss): TPlirsgs Tf^ve.ii DpS&i&s (jTi}' I ss id e a i scrip Ds Esahsseteaesst persasele? ddsass sesta eaestsoaiad z i pad spo'S: Bsa llllrs|ss dlsselsssrged tra m lisa cast o f Bas smpeassirsST.S:, Oversdi ssssskssaksassisi: slopes scese Sri : OeesiPppssp eeesshssd iss ksessek o f lisa efsilyaakosepi; loss p f ispoised seaSso, assd esBsiossssidypg s:-sIxoss o f soilsegs seslkse Ida: ksipoasdiaeai Floss ylliBisp c if lisa issisags iaees iseweesr, did sssst osasse issMsee: oyedsPssI IPekiessl No,: do i,s s f l V o :. sskssa Mso: Blie Lpeapaa; sValksse, ID, USA Ose Tsli los Typas lisser Baisi Height {sais V Das Type; US CSssso fssf Mssteook Ivite isispcisiissdiKsl: Volisi (ce, sa): I altleal: la lTrsstii ITsia: li M 54 API fasIdeasType: A Caisse: IT Qaaly1*oTlsshsigs Released! {Pa, sa): 'TIDC Tediala Teasel Dispaeee (as); $113 IesdaI :ss$sripda: I b s m taiiRgs il'!: m m # ,g e sidebiil m tin m . k j it t : s iSOlii:er m i U i;?i n:rssrrovv V i s i l e i.vHh s t t t t :k \ i i m ? iee. Punng e r:if#A'T- , T \m 1 on ; erek i'T M h n AbMiTT 1O-yt. n :'.e i-rtev! QW &r h x i { f l me vi sipecffara Tk:et >s imisis h & .MS bkx'KT 5V ilisbiiSs divestseg a Arg p & n im o f die sPeassiitess Iala Ilse pensassi :s:::s:ss:::is's::0 Lsssiksag SislTicloPt desassl spllwsy eppsslsy Re fosse Hows Bio ! ; s v a a .ss " : I a ' i- P s Ia , I "> p * SSO so-s >s: v s~eads or .ose 'f ,,! ihroe O i - f i O . ' B> Si a s . v <<s o A I ! i k j A S d <'i > ' iodi t s o , '!;< i a S s a g i d u e l S;,," y i d s ' - a ; j c s ,v,, s , v o d r . s , !> dos opr a ; !->'s p o f e . < a a t ea , ! ' < - a , <- s , o l a o a < oOlla, 5' > d s a a . * ' p A hv a s<! -te ay. p.- V o S d r s i s ' , `> 4 'S D a S s y * I , o a k lisefeloal Noe d l Deai/Mlae Hsaaes Eardi Ressaisit: lAkse LoosBiioa: Gode, NM, USA refl 'idilags Types ossspaoe Bisea Heigdi {pi): I:I Ossea Typ: US Days Fd) MaSeeleil T Isapoeailiaesss Takspia ;|::s as): Toskits)) Ia!o:rsskslloo; IDese; It'S lacdiaal Typs: !,T sriaysesQT QassaliN esfTsalagi Released (ca, o)}: Tsdkigs Tessves Dkpsppe (m)s Isosdsos ITeseripsks: impeopes: opesaisi slfssl kseddsiagfe leilsssp ksiich dsppdkia edpseed psspslad muttt io eaceaae oo Ilse ePfeeskmepl ssyeaiippioy. Idlipia iss ssesp rin siloP ot eaisame pesscsplpslsia asaal a-ps ssssoekited seishIlses Ssdesse, ho'sssv - ,', ht. si,* - A',s !' Facia' 't\ ! SB-j > faNdeist Na,: iS DaisVMiae Nesises: isasdesilBied BTSaa Lossstspa: MS, OSA te/Tadiagsi Typs; gpsasa Dato HolglBl i s:;s): IS Peas Type: OS IMia RIII Matcsipl; T Isapfsaisdsaeal Volaase less, ai): faelsRsasla farsailaa s Dsslfe 97 lasskleos.Type: IA Cspaye: fl Qpiiadty a i Tatilags Reksaaed fea, m): Tssslsags TtsivssS Diesaiiesis {sas Isisskltot Poaerlpka: OVfiNsppag aecasTed sle la aeasaasssiatssjo of waSsa so If: IsapPoOdpiesii poip llacddSisd aisafed, The esaboaksaeos sssiaseliad ad oi:r assis stdessoed, bol Dosa fadore ssS'sise: Solkagis did aol develop. The breach as repaired ssssd ifee asaksafcasfBss pleeecihadk ksio sawica. Sapree: Asiasossosai No: esosi. Nos: 115 Ooai/klioe: Nsa:; St foe Lead Miya taeassaa: Fiat liTseef; MO, USA DralTssssg, T;rpe: lessa Dam Height (m); 15 Casa Tyi: BS Dasts Fdi Material; T kispoosslsaesis Vaissaia |eo, ai): taeidsat hforosBstdass: Dose; Oidi) faclslaal Type: TA Caoae:0T Qsiatahy af Tssldog.? Raiasseasl ica, sa); Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 107 of 145 ED 002061 00172724-00107 T iife p Ti&v1 Dlsaac:g { i h 'J i t y U 0 ^i-rl.tifo ii.; | iiim d i PM 'iid k1 i`l!<' ''iif'Jt ifos o'rt*. " * u i, s s i* ' a f r a - e ; .e i ' - ' f ' , s > .i < f a- |i M' i ni a. ,o' s ti < d i .i i a d - - a , < v D f o ( u * im # u i f o h a 'r i r H ts'W ;ft ; tsar e t t ir ji /.a 1leiftaifo fo tr a>, nan 'n t; . pa,. ' i j ?* ;v, ..me fod.ig. H m'i sM , . liie i, < 3 ' 1 '.'s i j i foa;i ci-' s ! 3 ifo . 5 r ; US ji P1 !li ' t, ' i, rr'ti, ! 1 o r- J< A m Y i f o ' ft V '< <i*xf v r . J . v ' a . s i . ft Ii iimm pp se' i Upc , ' ' ilia pais t<a v><' 1m iS' <$'i iii i vlit >OMi'Mi '1 h a n f t s s i (it*s a o d s m s Hstf *>H cmPO ',; ,'> >* Ki ? iKJC' 'ajy* <" Pro AM J1sTj 'p i*T /i VSi:,J<t 'Ji \ JJ*ti a di ifo 0, ' - p ' . >ae rfo c<*h " -uu*, s \ o vo m h*Hu> m h*><'!> ^ *!!!<*t vI' Mt *<' -, >v< fo t - a s fo fo ' 1 i n y , f f o k o e d fo o . r i}: .3 9 ,f tp ) fo -. i ,<" T- s, \ P i s i it - foui j^'uv >*si* '>i' -* v \*t i>' ' ; / <-I' <,>* c r s' a s>i.' is forst ifo-visp. t^Y (h> a ifa r z>\ztA <*;r ^Kis 1 \ * m ,,; au* v* ?'V A i,,i!i,i *& . !i.m fiitC isms rsa sise dssm crest %, Hi X*v M i hj'if' ' v^'^ - t " ci. Sia i i ^ <Masse by irarsafttg aad S.-$C ;s'.ae'( ^ed'lte fa sastre reieased ttidd a '. ; a n d a . a d . i d a - . f o - . x . a . w f t f o h a m m i n H ', r y s>< h m m s n > K A S V gSsft.% i 4 Ufoftfo H i -a xfoiu- :fo a issJi 'S.0 i 'fo,,'foie! 2 fo 3: 11 ! ' a-a ai r- i i! riftiarr Ad fo e a -fo a ; A fofo 5 3 ! Deai/felfoe Mams; Atsrfo S,A. Mk?& Mfos Leaddsm: Bi,da Maret Ole/lfoifttigs TypsCfofo ; . ' !', '*"1 i . l ' K w K f x t 't x m m m g e i a n id a i a : I tfitCfo I SiA 'v l fok^HuiWi., !^>^3 Niftsv Sh h ! ; foi v'MHsae. Pam Heigfii (tp): A fiftd as; f m m B m i ! fo e iil Pp-; 21ft a i f j M !d :i Typa: fo liy :DB, M- I Osm/Mfoe Nas: foadpirard fti fil! MaMdsi; 1 (eveeased!: I Mida Loatfoa; Siars :8dope Afopafols, brsgaarafi'esad Afofoare sfoa : Apposa, BOO,!!!!!! I SsadfoBdsre Salprfo f a r t Itrfoyms ! Ora/TaiM:ap Typs: saasi, afoa, gaM pate: UftCftft I Pam Help! (m): 4ft aafoefo Type: IA Caaee: ST ! Pam Typa: US Dasas Fill Maftfoai; T Cfoamii o f esamsafosised alfosat released ! ftapaaddmaat Vaiama (ea, m(: dfoftfoftft see, m i iuii.Cfoft (EsSimftfo) ! laaldaasi laforsaade; Taslfoga Tretsel m m m {m}' AitiiP:-:;;::: |foApA ] D m : (54- !ft?5 foafosa; Type: ! A C sw ; ST !; idiidaiiiy aj| Tailfoar Paisaaad (sa. ;:s: fofo.foH: After sfessfte w eal! cemdeas (pa m i sasa? I <:<v:fo.^ : '><: r fo fo.r oa Use sailsap pisad, isigft pradpftatkas: (A ire rr ! iaifoSaai Usfonpin., die tsfo&gs dagesiiad eat she imies- slsiafcsitefo sigss ieeii o & m Csdsder ftasrs! tieiaase samMed. Safoiifty tees aifeiiasi, eaaafog focal dlsgleiameai, sssd fols l iOMet assd izMootorx., aaaiitdssg in ifoasfofsl Saflams Tiiirgp. Ilijwi'd safoigaetidy developed foie breaed g f .I:<2i tr lsa i'h-sf osfa apptrifotKaisely 3d m fo leggik Tfte elTtaasi :faY:g iistrasd . $w released dmssaft site bmaek Sled sfta: a mora detail* saa Sesdr 3. ^0 K 0iW r i sam am! Usa eater p m w & w j! Secret: !COLD 7Hi1Hip Co??>iHt;i fa jih m?w\ !fo| foe: isapoassd\?smt (Ai j 'S fa mtofa tad apft!3 amer Ib ofam i! m fa d:fo: Ma : 23 faknm l A m t ed ift,!)0 a d o:f iysu-idw- Dm (M tste Iddase: Casapasa fa lfa efftaeat aoatagdi olSO i s Loedoa: Ps u iv :ft: ;:s::rs hsdv'y mfoaie foes rdead foie ids OrisTeispga Type; Seseea as Tlsess efoem aed siiae fofo dm Dissaba, Date. Helgdt (m): 5(12 ftpeliy reaeforig iba laed See, Sigedidcims Disw'Type: 53 Dam Fft! (daledal: T ceeiaeaieaPee esa.fore river a -sfoelep !' 5553 is Itepeaefoieetd Veieme see mi:: M i) m, tea beeeei imam sad raom ddeiad. It setfoed slgpdeaa ftshfedl see desteistae of Ae.idOfo fodes e e iid e i. Pste; laeidesd Type: iA Cades: ST itifearfo apeessri ia tbo Aver systets, Qdifody o f Taiifoge fekas! fea. ss): Aireres: 5iviediMPBA ,Aaa!saadtefo foeeeee. TSi!iegs T rseel Disamee(st): A.'pet, 5A' IdsMeat Peesrlpifeat A tiamberisffosibigs tlame op soMS ft irtdaigfo Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 108 of 145 ED 002061 00172724-00108 -ina eoveVp-i , * soa y e r nane Hfe i ..-} . - .Jr,* " ,,:ievs. M issiszsd a crnasplesi , s x > e ; - vk skse airysaires ass! !>>e,,; sw-M'-ne s; ' on n p - efemaads, Wim J.." . i < < f fresa fi&um -f tant gap a, a- j. v o 1m c: c M iSri'! s S',sS<e\ :s*S?e MVg m i ' l >> SM !M V S SV f S:,: IA iM iB F V f sM i m , M ) S*Kld!ii H'0,i M ParsfeMisie M seais C e n a ISksgre Pis. 4 M M LyseailAsr: d te : OrdTasisrsgp Type; sopper Dam Bsdgfei fro): 40 DsMTape: S Pesa Pili fetossnd: CST fenposirsdnsard ofeisna (en, sis): 2^000,060 Ioddfersi Isdirneattor p;w U & - 945 iacrdasii Typay !A Carcer S3 QiisaSil o f TaOsgs lalersssed (sa. Ml: illlfeS! Tasfeagy Travd fferdsnae MA: 5,sK3| Iadslersl PeserIg l : Tfea dasn wsss esaoerseted usSag ;: srsnibisssdsB! a i sa:!:::::,;,io orsd serirfeirllrs iS|elnnsd5> vaislr dowosfffiia slopes o f 1:7:1. T ie &m M erl fe lqueites dialog iks: M 7J arlliriak o f Morels: 3, iOSS, Stores tewad sferrsagfe s rsorrsos breads, reoelsed: a creels, sard: wear donoxiled dsnvseiiressa: fors sMase af l Me:. Mece: Csssiro si I asceso, l fe 7 massais, M Me dear M , Ar o N ! ' s se- Vi-ia d e hgm Um ! Msoe S-vas-.' v sP i e f s Ss<- " ie <peer 0 iv ; <M t r a Pam I s.rS Dass Fill Moierid: T feapoisrsdifseoi: V;sferrasi Icrr, ro): ?CMfiM) 1eddeai ! fdemeSe: Para; 03*03-1 OIS incitons J y tm SA Coese; CQ sooofly ofTssiiisgx Keleossed fca, m): 2fe(l,0C! Tastop l'aned Dsslissaefral: 5,S)0 Issddegi: Besorlpstoa Tlsa: ,Uo; es: <raso:slras;rer! ydog Colli essslreasa and oeaserdoe sartode Willi dowssstoans slopes o f I .: S, Barsag die M C I asalferiissily s f Mafoi A, 9&S, die da! failed fey feqaaldskss, Searea: Casco o:ad T s w jffit H lfl;'ffesevose, fetit ls:Mesf Ha i 14 A ! d 'o 's 0' V' e ,,A >' Miao LsAsd:* 3|sa;a OfeslM Ilop Type; galt V'i, S Oasi Halafel: fesl: 3S DasssTyi; OS ' Beai PII fetesmfe T !ipo:odmeaf Volema (aie m}:; 4S;I5S(IO0 IaddaseI alar 0 i Pale: 01-14-19 i l iacwaoi Type: 1-4 Caae; 14J Qasodfei eiTMIfeigy R:aleaaes;| (ea. sa); 80,000 Tdsllisgs Tio:val Oisieead iia): 7::felXI f aetileM BesedfMk?; Tfee eihaekiet was caespiied adlfe a eacfeall siancr esilia: aad Isad alapes s:sf afesei 3 ;l, fasiera iscearred by Sk|dsrfisedcs deaiag sfea MTXs Ims-CfsfeliasaRisefeat easlligoafea. Tfea foowslssla reoefeed ad tfeiaadl Siwo a rivai fcs' 7 - fes, casaogrsae Ifepdfey, Sasarea: Maraoao!: i.9:Tlfe:0fcasa,:e ia i, ISSO IseMegf M& I I Pasa/Mao Nsas:: l'Isiolsikasfel Hcs.2 Mirsa Ceaadiaa;: hpm s f- " 'S s s.a I';- - , i M Dasn Basglss: (in): 19 J sa, "sp. I A I !->- S MiSi-i a s (mgiiseedaieiss: V'aiisma ffcu, re): 410^000 InrldeM k A r m s m t Pala: (II - 15-III7 Isieldeos Typer I Crsaae: SQ QaaadA o f Talliriga Ralaaad (era sa); 5iliXl Tdilegs Trave! Piyferoca (aa): ISS PirHres Baserspllee! Tfee srssfesSSBksarsI: ws esssir&saelaS Idi s-soaklrsl ssanar dik-as, and fe-ad ale-psas a f 2 ,1:1 le .3:0 Liesiefacsia l'kdrsre sa-acarsad fere: doy allea sfea dorsoois,- H j ISSI M 7,0 iKr-Oafeisiia- Kitkal ::-o::;.hooai::e. soid rsbeal: 5 feoers ssllr dia lira aliar afessaks effe! 5,4 end M 5,8, Srae: ;Mssrs:ei!csls, !97; Oaoa;::. el, (Si,ssvio: (fseree Ao:,i a f DseroMsOe Ni:sii-:: Hekkakl-s Miao Lsssstioo:: iapao Otti I SS.:! :a:a-::; fyp a i Das Hdphl.(m)i !2 Osmi Type: CS Oam fsll Maierel: T fasneendmersi 'elnia-(ea. ai): dfk !aeldasel: I aSrewallasrr Paia; ild teasdesrTypa; I ?S Crojia: liQ Qoisslrly iTidlfeigs EalesisseS fee, ai); ifeTOSd Tailmgs Taivel Ddiaoea |m): ISO Irsafeladl: Pc;;:rn<feo:s: tlie esafeaekreiem: idy<led sr law radiMI sprier dike: al ifea ava. aod was cerssiaaadirl wiih 3: ! sisopaa, lisa: asafeioiksrsaro; iferirsd. fey !igea(fee:tlsre darsrsg isle M2,1 Toksssfel-Ofci asiaikpassfee, aad dia fesrslfesig Ikrwafesfci s-cadrad sssid crossdl a sivar srl ri; diawasisyrssri roe o f Ida esiibrigtearai. Saarea:: Islafeans, et al,, 194(1 .01 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 109 of 145 ED 002061 00172724-00109 Irsubv' o*3 ; s? *<< \ jK \ i i > s' mm TI ambapSiitiptes: fisilpd edSssslrigisisaSty sis. ds: b;t?D S-4La t-bt'Sa sdS^ak-fbSiasb -bj 194$ H re s fern * ! o by iSscssIbebms, Tb dam bad Ima caslHied b \ ~ m u I .r , >>p ' aacas'dmi sa ils igsieedteS melismi Isy spigemiag I ' i Si, c.i (i ) D as S ! N SHi v temd ? n V >**' <<> x' o <; *V ? Item Simpes ee die masi assi w: Ss use ss sa emergssey Sspyeiraisi al Ida lim i o f dm eSsrfSsqpisl::. EfflbaSssagal Topas as sleep os feeSslasss isparmsaeirms D m- ! i fe > tS:S,S) arte die gs'espce f abase Sayers aessr dse Ika seggasi tesi alasse staisSSsi may bava tesa: 1 A'k Ote! S<p" S'- i, ! V ' 1 ' ' v i?v >v' ^ 4 -;- Os?a es -d o -t "' M' marginal esas befere i mrfetj&gke. le SaSKep Sks?sSsecl>:istx)j:'(i Piras a f ES CaAlim. fejffioe So i 'P < >'St i i ft >' *i<<f Vb st<:r e ti Sietes'pSitete, nXil' hMY'<!0(l Sscreee; iify a \ ' i ' C a i -te. s : fete ;mteef. , rd| ''a m S s o<Jm' bi. IrseSdem 1 ih: 5^ V')U<bv # i>'\ '- > , $>t , .. itK u i'j-'d n IXg D-in'Mjri? telteK-: HSerre Viesa " tefetei'.-mal r <m I -a s- >; - V t Sa Lfeffe;:LMn; ClSS V'v, l a Ms' j! 0:aif|Sli:l|^ 4>p e; cppiX iAh SAii 'J "U lu \l<* 4 >"-44j Das Hesp:l (M'a '<s4> ha. 's`Vf'i'v V f 1 Mt! d? *S I fe D w .T y ^ ; US tBarn FOil. MaMaF T lttpim:\:tiit VeiM is,`%ni): feoldebt bte.l f IteeMeaf SteorBiaSfarsi OmU CBm U 1545 Dasp/fesn Name: Cerr .Nagst? Ma 3 incidasi Typte: SA Catese: EQ fetes LesssSsppr Osile eef'ildSiegs Type: etippge Desfcsgbl (m): 2 Dem Typ: US Qaeetity ssfTailings teSaissed (ca. rsi):; SOS) Tailipgs. tliv s ) Oisbitece (mtb Sfedir C o r i f e :;? i i - - t s ; p f e . < i : . S ,1 te SS,- < i 5 I feiptetedoersi Volismfee, sgp feMfCfef! Iaetberte Isfarsiatisps Tisis psSrrsm dm aaprieseed tk|S|s;Sfete ) fardardssiteg die fe--? HA La Ligo estelsqa:f e . 'le SiqaeSssl taibsigy traveled is disease o f te 0 MSt! OUSi 455 a ib gessi yleysmg aaSSay Uso without ifols IrSMfiil Typa: Cmis: Q Qteteidsyef Tadtegs HESesseii less;|: SSfefeSt) "Sasbags Travet Disisi(m): Stefe) aey IsKiiSge. tesare Dsbry asid ASoerae, ifd ? Iseisferri Dre ossis Tbs tepsirraste pfsis dam abpaapssd ssrimg Uxkb'g 4i:bX% bx: M figs iXbuyjUi. 0 ysxi; t-tM aeemrma iiUiCPt Ibfe S X iffe xiX mi mi ess the spseilisd SbMXii b;t ss m I* n K Q: miDalaa & M r sSssfcteg CiiMii- Hxk :WiiVKi: O I'iaaellsd ab.msi emdadi -gris&gfl-sr ks- s Sis smhimkmmss k'f, i>ivsDseitep i.it. c:bakroentsml p m liisissg a liSSSiigte ;S.,:'tei batirse iX'te'v SilJ A Seist,m. I9 7 3attesisi Aol fe) Dtei/fettes teams: ta Ifebigaa New iOeal Mia tassai: di1 !aa/Taibags Tvpe: sapper Dass flegln iss): Sb DamType; US Dois SUSMgfesiaS: T lieptestediriatei Vlfrase (es. ra|: lisldassi Afeo oso'ioa; 9S Isssldssi Typ: IA Casa;: SliQ QiMity oTiiVig:: (U: tn\ SSjC? fil fe s M!?A 0ISl/:fesbSasri.e: EUTefesOld Dim TiMgs 7rrPton?Cm3: 5,000 I u id%i p 5 Th N^ Dam w&s beig m z m mmm. mi bissa Leasir C h M OteVTali'4U Kr pst m pper Dam Heiibi (lent 35 wtr M tk& ihr**? o Ol M M 04 1% M Lkgii mmhqmig, m p m kw i by & upsUtLm-Yp^ SnbsrOm-i^? we- Dam Tyix : W Dam fSSSIdaledal: 1 Impoirafeimi Veimae (a. os): 4,250,000 r$4&!iv<;% fbgk, wgf mSxitiM t it |.44.-0' Tbs zm fa?ijsd b fssssifefInform atosi' Pete; HsSd SiscifSeal Type: SA Casse: SQ 4?.i4'iig m c<i:?1:bqig|.b:;. b i n Okif'ygS' rapteleil Qasabty of TasISogs S?,esassdi Seo i);: SteteS TaSSgs TrayeS Disbsse Sp): flSbii !otedesiI DitesrlpSms; Dbiy & hiyisz,. 1045 im Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 110 of 145 ED 002061 00172724-00110 iaeldesst Bea 1'1 Sr- s v'st - *. <'i' <V vbe:p ili t e : i r -rasar. 9 s tk Sl'f- *' I! il,. . ->w .\i5 per lata. -S-aalafr P A B at S m Sfi t f s r -a SsrsstssstsSssssi %'em.tr.w h at S'- n&ttr. m i - 1?.m ii\ \ t , rv a nV HQ ijzyiiy o f d o io p fbebwoed (m . m}: 21(M TtO.blp Twwd DisWOVe (O;): STOP lePdVM 0gfipderO 11W wbek&eei flbied dodo|| lhe M7-7 L4 Le Ligua s#r$hgug&i? by liquefartene- The M m 7*s oeewiroewd by the opfOrewF mebob web :Uop> weeiesp m i ,4:1.0. H}. Mm%%& LvmUtw tasimg Low dkle was mpiW,. Sbarca: Dabry p d Asvarp> 97' Lwiderp: ,: 9 DeoLMbis Hwim de?whei& Lhe L e m b o : Chile OwffHhbp Type: ceype' O .HeQIo<e:p.: o! 'Dem Typw US Uam HUI Vbderwb C$T ]m.;:3oorg|:ym Volerne feo, jti); 20#OOO>OO0 im l& m t inkirm &m n Date; M fb w V 2$ Le b dm Type: . Coese;: B.Q Qesobw o i f o p - Re-med Ce. w }: 2J()b.0C?0 Tedifi-gv Heve! Dwbwwe (ro): te k k U : Besabf'bm Y$&$ dore w&s swesmewd by eyeLob Pg s&sd ai ;bays & .iba?a be ovio? shall. Eeob&ekewot slopes, w:eee ss swap ss I L sad at aba Liao o f Laissa Iba Issi pasaitatT bibs o?; iba efpbweberwoi eresi Lad baa eww^rmed- to & b e ig li o L io leed Tlsa dom &ded by Ikmefmdkm ddg iba LIS,3 T aifa eeohgeoke eLOembw' I, 92$. A mMogs Losslil. devais pad ibveagb. & bfes.eb sasdao pp7ws7?aba!y l ad) Iasi wide end Ila wad daws a vai ley. bilb'eg 24 fwople.- Semem Pohr end Alvares* 1967; Bwwoeo loddstd Noe 29 Dam/'Mbia Verne: Casaplea Mida Lemme; Pom Dra/fiIbigs I'ype: tbeo liai.gbi (m i: :07 Dem Type: Ua Dsm fill Vheedsi: T mptmmmi Velame (sa m}; Ieeld<mi 1nbwwmdose Daie; Msideei Type; I A C ; HQ Qmoby sf Talbays Ealaaead Qm>sa}; T e l i m i Travel D&tarsee{mil le d d e n Pesarlpdee; A aasAbsf o f tailSaga Mm% tsp: ta Jb tes 1st hei||d were ifeveped - pss Iftyeav sttStta ISta its sis, aartaw tSiaVS. as a l CStass eSaats b ' M >> Ov 1 .> ik;fbetiiovs; as Steter slePsiSa tl " '"eeree 5 ney 9 H ? B A M 'P i ? ; US ISCIBEST? T T fte : IA I t e ! ? CAUSE:; ER IsssttlrM: Se,;; 218 D ffflM ta M ; Asit-t te r Itttila p Da a ! TSssrsmsS Stesa PS? "M a rts 1 !>', y * sastsaa M s Lisaatssm: k S is Zagstss,, CsCsat itegtaast - ..a fi aiiasjas Tvar: ,s\yis/Ctei.as D s H s|U t{s}; IS Dam Typ: Dai F ill Slsisdal: Cms8sd Ash mi Clmlar Impaamisasa VaslAme (ca, Asl; S2,080,M) laskfaBt Fif'oi aan'<, Dai M H '-iS a laaiaaTypg; SA Casis: ES? QaaaSiy a f Taiim g l Sataisad {sa s): TTUTT: T A slisp "riavaiDAssm: (m): aasdeirt r;;-5if!jii'>a: iamasa a f t e baaak. s i f!m appmmsss asaiaK f it e aiata aasa aatasa faSiaas, wisls Sat $Swry tiSaaSatiaa staaslag fliatm atf Sita: iawai" 4as seatioas bp p ip is i s5F>d aa>sasppis.|< f a r tassa AsSatla saa Tassata ir. Saaaas: A it e | t e assi Dbaistssa, : P P A M T T 'fte m iH C IO iH T TFE:: !A l C * E H T A 8E ; IS Istakmi Arsa Si D ra vM srr astas: Aia M sse Lseaiiora BstigasiaOr Ta iSiapi Tpps; SsadAftia Data IlaigSts (ss): te s t Tpise: Ufi: Oam FIO MafeaSiS: T SmsaassAmem: VaStsare tas, s tf Ittei tiessi I alateaslpst:; Dass: I $86 EacidattiTyfss: SA Casass:U QsssssS?f s T a te g s aSatKad (aa. stj: T a lla p Trarsi DiaSattce {ttt}:: IttsStissl &.:; m ma: Ti * aab t g . <m <>f< i m s < 11 ' e i ` tiesasSs ese a v itrrirs SsSasc A basiiter, ite P PsIM fV F f : CIA !WC S t if f 1 b t s l i lA C iB IA T CAISSE: W ItseislsaC: tea: 262 ! IO Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 111 of 145 ED 002061 00172724-00111 Dstm/Miae Mame: MeMsspffot Mm* I e orti Merrtespnei, br Virginia, Estad: i /'T ifo T a " ib ........ ' *> im Y 3i E n 3 ,5? ' , i \ r ' J s''m i *9 i1- mov-i i ln t " i a; t >`.sta i %rt a SrM.knt t'sirm tw ti s'A-> V a ' `H Smp n a m N Cm1. MF s 3 s t * >f r , - m v w m M t ' ' U i J u liV - , . ! "3 ,,< pp foi idem Ua'Wtptsom in ,w * 'us* 1 s< v i-', - n fo,s > ns <F 'vi.'eM i't', <1 p< 'i *3 i, i X' i !3 "t ,1 ><, 1 'h v i !,>-! if i - * i Se- !> 'ilv* `x- M <'J ;f X'!. ' se s-'' ,;- Msj- i 1 "< `MM! .mi ! -exM fo rm t Hsj< tan 'xvwd . 'x p o rf *1 , a a ,3 , ,p t" -r Xji i t, , i '3, 3 ed x u i,,,* ; X Svi o-' v a vx p pTms, ote ~x fofo ` j i - A ' c fi * ; >< >' tfi's > i ,,'X i 1 Xam <Xb<" ;>x-, db d Sxxxxf; Cise .. Sm p* -p, ia)Ami : 39 DitmAyffoe Marne: Milk 1-fotse Mime tseadoa: MIT, USA Oi'MfolfogeTyts; to fkr e Darn Height (M i: V Dam Type: US Dem FIS ivivivv-ifo: T Impotstidmarst fomef&n, m); TfCsfoMM !!s! fe rm a li Dek: IVxS ktfobestl Typ: 18 Cese;: T OamsSiv ofTallktga feltaaed fest. as): I lllfoCKI F,,fopp Tassi Distastea Coa): titelda! Deaerigli': Dating eitteme rn tM iV<: v eM'<vi<>:e W a t t , i b e s l e p t o ! -s - m e s M j .< rs > a i o . beeeme xwxxvvi::, .evi C ,, '' v .n ; 1: direttesi etrsamtksxe miss the vxxxvF a-' 1 mp<KinmtM. The ocam eapowtv -s .3 5 ')?, " ! {g fox S Fv , F ,, a .X - / te b s ip k m e td te a s o m v C e>! r ' m ' a T i \ : xSO*;srPe; Tniebd, i 432 DAM W F & MS IMQOSMT WPE:: M iHCIBIsHT CAUSE:: SI MfoifeM Mm; 71 D v m T v C vv N v.:;v!xv S'tiimamSa M i : V 5:1 SSme Imeokee; WaaSasge Corne, OSA Oie/lasaAs Tvpt: mll Omst MeigM Cm): 3? F:vii: Fysv US Da!.FUI SlalefixiC; E F:vp:sv::m :v:F 'Vo}ea:se: ivx; h); 3 0 :0,,0lKI I aMees !formalim i: i,< v i ' !>!* ' h i v i " A t -i'x ' M Qsamrky aETaliagr krxiasaal fa, sn): Tail foga Tfosal .Osamaca C); liieS rk mesxptm A alide oesamed Ca fo spliss sio:p .ss a: asa was befog eeaslFcied o f fogeg EIS osar foe se rosi ixfoivv fisi)fogsfoegeb. The :sas was rsdaiaed a b foliare dos as apfo loedsg, Tbs mire was afo 14 ft afowe 'foe mfosga >efo:eEoa wise: foe silbe oeeartefo Sliding took glnee: seer a perfod o f I 2 rsloaies. Hie msaldwg sxiap was ehoas 14 E, fogli arfo 5S0 S, foag, widi ns meb as 2d IT oF.fateisi mevem>ssi. The raise was la te sm'c.essfoifo semlmeied vv a helgbi: o f 2d ft reifo sgelai meb:o:b:g o f gkeosmefoos msb eordmlld gkeeamei mass, Sngrrg: Pegpghspfo Driof o f fosvbmsriSiKsi kesaaroea, Die, ofifom i Safofo Dm.oeM W : M L L oj'x'i.! ".* :*x' Vxolibrwga Mime Uoearss; wrseoj Heg ro ore hasfo, Eoathrss Ukmfoe Ots/Tallirsgs Tygo: liios Dam ftelghl im): 32 Dam Tvge: US Ifosm Fili Celsterlal: B, T ad E famafoed qaarMtte.) fosgnmsimsfo Volitase fofo m); SdfofolMlE iiafobaM issferamdoB; Dale:: 01-0-2984 Inelfoml fyga: 2A Cnane: Sl Qomrilfo ofTallfogs telessed isa, ); atme Tailfoga Travel DfotaBte (i)i iaefoep: Qearrfot-ear Starter dar o f kea 22p high, Two vxvei gker alpe Ei foisxi to 32m. R resik sorfo alisswed fo ae am! tlkak eat ia eres: Mfospar dam es isaEeer vrvvvxvv:: Sfotter dem beeam: iispraid. iTomdrasal alig develaget!, sski ks t * eatteed by i a > > p i i , | x , x \ e i - v - x . - ' x a i , t " d < ' v ; ` X -> i e t tar .bear sospese!! o f foorixitetfoa t ii, oiabditaM by g* eesigbbag >-:i:F msklMf Searse::: ICOI. i'islkag<. Cradmibee. saesderst Moo t l i Dnmxfelxn' Mama,- inm i xx/tixiv klsbs baeatio; wmyaig mb, USA OMBilfogi Type: .raaiam Dam 11foghi fm); 43 Dam Type: S Dam; f ill Material: TkBpKidmer Vtltmtrfo;', t):;: l8eldrB f l8rsdi: Date:-03-OI-I03S fsteldentTfopa: SA CaBae: SI Quiaoilty M T a llfo p Msfoisseb lets, se): Tatifogs Travel laintisesfos); iaodrol WxWiipaxx.: Tews siidea tsec8d on fose 1,5:1 amhaekmesl slftpedae to atsowmeit,atid foteopl seepage, B^afo Were ahaifaia, sasarfog Sfobil ft P p xeCdrfo 15O-20 ft bmz md., u?:;d it m$&- N'cI si:3iN:^doj| iJskidK:! M>r20?H<! in Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 112 of 145 ED 002061 00172724-00112 d , ! -< (<!' pee-,Rae p i i ye- 1<aess-s! ira-wr S , y S ai d<- ' ,' 5 a vO' W M c i 'i 4 >'A: . -trt :<>< t J ; >v i.s. . > iJ .it > H ict ed ` - mpe- s*? u ! :< ' ' S MK- I. iU 'i, i i j i '. a d l . i 'U . R J, l i l i ,ii'. Telatsid, iTPb; Ojio. Piiy. W sfe Ses. ; issate N.i 41 pstai/Riaa Issasse: GCS Mlee igeati:: Altete,: Cagada teTsiitaia lypis jsi saisds D i* (s); S I Das I yye: US Das Pili: Atetele!; T topestgsteesst Veiiasse {esa t): IsieIdee^ trferm eite; P!:: 97 4 sseidagt Typ: SA esssa; S! JJhsamity s TsdUsyp iiteeasa. ite . as}: Tlibsgs Tstei Da:Jas {ist}: tte d l Bssersptissaa i&seenti sptedes e f instability eaeassgd widte eyatpaeet SIS iba! ssssa. usep paasa.;, oysss epsgedad tetch aasssd teitegs drftig syeaaawstey af aps&eas fasse. AB s te tte vitese af tee! im tim me sg-?goli m tm iiili, im a p . im ?. frni u t su 'gffia- m ih i eompetee BU Kpm z \i).y mjgii; Thggg fililmm Wt b m %% $0% p r mes p p i' in tilg Uk :ii he m k gm gbiirsp; ii 'MW iti :f Va,s i lc?<Jbag t: mi phsc-ttm x it Hig t e !1il OC^U-e .u\b-sg M is m oy git ;rf;b>S?iiktees! a: W& fOt. je p p w d ixsi }ad:{ N ej SOI li:.sassie.tessi: p-issssasa's slssy SS issa: Mia Laeetess:: Mayteb h Z , USA pii:'ss::^r S-SSsS'SissPSS-: ispsa iSsiSiSS-iSaS:' Dia Mdigiht ss::) 52 Pam Typa: US Bara Sai Materia!: T teipisssidsssiesss Vcstate sssss sas) A u u k - a :!: esssiic/i : Date: {Di-Ite-! 91} IpekiersiiType:: 2A Cassate! ,ct- ey <' a : ras- ete a-te {a, f}:: Da! p A ' te ` il < SJ: Insistete Jisserrptktssi s'\*,a!>1ty i , e e a ,>; i stea!! saette sai tee SSi!s.;ss;;S.ssas:SSS:s; SiSSSSS' sSSSS SsS.SSi:SSS;Ss *.'ss*:" a sssisissisaisasssssss. issa!ssss;- dai! :sas;ss.:sssasS:sia: ss:sassessi: :.es {issa: 2., ; a7a piss ssssiss'ssp?: ssasss'ss ss:ii::::issisi l' ssss pfeeksas feda was teetsd j petead seepaga ssssissisiissisi sssssssss ssii ssssss ssys::, siisi.! siisi: SabsespieS iiiisseteis:: ssssy day issssssissssi piai: si-sissiissi' issssssi;isissisis. sSSiiifWS .SsiSiSSsSsS.S Ipetite WpJ: ? ! SiSiSSSSSpsisiSte siSSSsS: i.ssssissss ii'iiiisiSS si'SsSs;SS Altee Ceestte; Washington County* A!0 USA Osteite:i{P:Typ:: issi:::: Oseas Height- la): P te Typ: US Daga RI! te a !; B tepssatsidsssetd Vetese (aste sassi tesate:iSi: isssisssi'ssatesis;s .Dtp; ! d0 tes:ss!sass.Type: 2 sisssssssasA! QasatessfTaiaps Reieassed !a, m!: tes:issssps: Teamed Piate !{}: !ai!da Pesr!pw: Tie: S'glItlO <500 Svgg iois-triiCited \ !# :,'j to- gg. iImm bgiglo of 4i) tbC:t mH mlaod g:rs.t btg?: wills A W uM ihhiE lo the. spillway smiheit es sa Oilood, oim ng m m e tefeiSgi: issibega haute b:mm:h o? dttm ge m lite diitia emmmmrneL l 19&Q ib. &VP <0|K;:d0d la bave sliwo. signs f sh::0'm m m it& 2 :i t e oe ^s i H m mai w;as &mm$<-tl Witlt S f-3;fcfi toe b-O. 1 '1 s.-OO- The mn retrigiggd meisrvice wss sed tmm i W5t;k evoboie mm sli-ti$. & rOuuliod oo issSsiiSssissisassspssssaf13 ll Bsese: Aliasp:! Deys f Ns. !{,. pasa aed s{:.:s:ss:Ss:sssS'isisssssssSss i:'issss;sssss teissistp g.:: id i! Disteste!sas? Ssssssssss: l issssssssss! isossi stesass!..s;ssaSisii ! !iteA. OteteTsiiipp Type; Ppp>er iiississs s'issssssss{sasSsiji.i OasteTyp: U'H Pas: Fili s'tatea!; CST !!pOads3e:iS'! assssssteis i!intesisrS isiisfi!s<sa ; Dssssss sssissiteass:. Type: itesi Caase; SJ Qilaatiys s f Tedtegs Aeseasad(a, 'ai); Taliisgg Tea! sPsawee (i); laskiseli Peaerlp!:; SfespeiasteSy eaeseda I5m wide aecaesf R ssisiteissikisissai ssi -sis'sass-fi , Ilsss: sssssss:i.sssiss;Sasse pssisiasas:! sebe ssi:sississasi: sisssssssssssS wc ba!!d?sed !a aa aaceseaeiiaaad aoedifte e tee appas- sssa'Sssas sii tesa siepe, tetesss'tey aB;, saapagev m tfp i m ! aaatebdaseatas .aedi be:p la Se reirogeeasee ftelere, tafe fesefi wab searted By peaasp! eeeedia! sebes. Ssasea: Wabfo' &&Betelcj !!!?d lidaat Ua,; !3! Oapi?Al!ee Haese: Ueidetelted Risa teassassissii.: OiasTbdteigg 1ype; Papi Haigte (si}: iDsffi Tyspe: OS Deas Adi Mslenai: sisissiassiisisissa Vssisisaa isas, sii:- ! aede i 1afeirsa ! lesa: Date; iaeideeCType; ab Cassa: Si. Qtsaably l'Tatiap Rsleased {es. sa}: 1 adiags Tteee! Piaaa:ca (sa}:: ! 12 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 113 of 145 ED 002061 00172724-00113 foaMssrat8 aserigi a ! Fraatei! sad gs-e-te o de lasaes 08 fe stesteeat t e posls.te t se te te g lsla g s fes s tP M te te ' tepe aacsmpnaiad fcy devale a i pipfeg deng te first tey Raya afsptsg dttv; San*; te a g tte e sm defeesy 0 7 ! Intdes N>: J Oam/Nine ame:' Sauipwesi US Miad Eaeatled; USA O te la !1!siga:lypa: Bis: S--d;;:;.h; (se); Uina Tyfse; US Dax F! NfeSesa!: T Isstpaastfesont Votes*lea, :T: )ivkka: faonisRlstst; Dala: !ateas Tyg- 2A C m m S Q-.y.m-lp a. TAslnga Released Ice, ns|: Tabiugs Teste! Ufense: fet); ii m iz BssaeNptla;; P: asteaste tep fes!;-: Sisal bmaclui Sisa astas ssf fe tes asanstad alias- a aonaagy beivy te p fe ll, tesdsd: svaisr vais Wall itaefe km sis sateatskasn real as Sise tese ssf iltate, assd ssa aSsiiiia v-t tass esre stesasit, Sais: Ala de, SsUi m m i vs s u s sususent types ta INCISENT CAUSE: N I faeltes: Nau OS ItewMisss Neme; itestesslsed dis Laealtan: Sends Africa Oteiditasgs Typt' gtad Etant Height (m ): Dans Typa: IN Etasst FIO Niasteiibi tetpsttstfesesR Vaines (en. sa|: lsttMassl lais M-aitasti fita!; Incident Type: 2A. Capasi; 5 Qtum% onfeliistgs Released feu. tajt Tasilags Trssv! Diesasse|sn|: i Idastatesserip ite s Savate ssepssga assd -piptag sudad: a eosisldasabi pSsrbast S' fee estetesssspt vispe, Sesptasg seas''asakl seapfe. Sssarea: idsssatsssn, Etal. 07i! fe,ulva bta 78 :Des/Mt Nasse; Niles! CappasMine Loeadaa: X, USA SDresTasHsp: Typ; stepper Dass iteltaTrk Os Typst; S ' Dem id i Material; f tepiiandtaeas Vsfesrse fep, sei; teista t 1sfarN e s Dala; eNleal Type; 2A CaassS S i Qnaabty Tatiitigs R atead (en, i]; Tplitaga Trave! Dista: (m): 1eeldsai Besetdpltais; w tn *.a droge >te :mHsda;at arrea t e ' ' vest, a US > :Csia s In';' <s' * u \ . ;sr' i J -y f.pmj, V < -s-e'.' - n e e e r n- t te d , v u i ,,ubn,; i-ases n ' ,vv e*- H a i , P U I 1aestese ite ; 14/ Data/Mss Na;:; uaseeisie Nise r .s-e , xy USA. teiadlrsga Type; aeppes^ Pass iidgldis!; 11 Da Type: US Dam Fsil MaSasriai; CST IssspaandipessS v:;,!;.n:s,.; es|; laldBl Isddmadda: Data; iatadesst Typ; TA Cassae; SE aasdlSy nfTaiissp Releaved (ca. sa); Tadlaas Tfete Diatauca fnD; UsesUeat Pexunpdissrs: D\- ava il \Salee .-e a>-nienavd - aK- pd <i 4' tee, <}< .edn^aS' .Tf~e'i<n- ,vi .sii- e i ` , i vr ityu ei-u se! ;Ue u ' >,, -ness'.p jss l ayerv v ' p!,s,t, * n Use Sn! -t, ^ t t 'dxea -Whi/ivo e siu i-es SU- -i!-,,.' < in Wl"a s',s - .ii<,,"h.u!i '-n-isv ,, 'se N i >' us 'sei s; nu m da ,t.,'p ..r k .'.V ."tv a.Sinea av.-Dvi'-,! Sviva ; U' ,x ,, un yr,1 u<u, ;dv seas ." de a.', ivi.,; t 'vp e nun. sui iS! i v 's iia ' ete-u u s I sta 'e u S' .u v >eipei ; i ,v I e. '. vii ,y > ' n>"'3 i ii sS eedip si e,pi S! e l\ " . i' li.' U t' idi (' . 1\ Svi i ''.V idv ; U,. Pi, ,'iSun' i ' i n i inda d i e e e issi ,si i"'. Ht k J .' n t.ii i . i iv .k ft1 . e.- Si ep s n v.'v ,, D i ne i a si' uede d ' e ste a vVilee sui a. Neepapa, n nepinnisy f. -as^un d,sSsape 4 via asTig' Iu's rx e ra ,,t'k resa aa '<> t'acueaie avcrnaam e * paudad a.Siltis arsa, S e t *; Sefeusaa ausi Talaa,: ITi! taeislaPt Ne.t 0(1 Daas/Msae Nse; UnidnetlRed Mae Lacatlop; Oit/Tal Iepa Type: Osmi H egla (ip|s Data Typ; US Baut Ed! NSaiedaJ:; T (tpanridtuem V'elstui(en, m): IiseMea lisfansrsalsest: Piua: (aeldent Typat: 2A Cltee: SE Qaaaslsy e f Xailsap Releasd fep. ;): Tei daga Trave! Bissare | i; a!iai BaserlpdPPi large pspiag etsyky develeped in e mnaifemeai dae la saepage daaaka >aa dte semaaukmaal te e , Pipiug: p ra p ts s a d Ite ;iagk m li Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 114 of 145 ED 002061 00172724-00114 '! i; IW n .n , 5,v, am! 0 0 O 2 ,,'' S, l h \ ' i ' i ft ,1',^ 'U V li3 ` V , >,S",S HS, i I S7S< ft * i i'AM i TE: i ft M i s f M n '-;2A o-h i c t d f ; i->' loetetl: ts i fe) DeoftMissss Nssssse: lisftsfeoiiifed Mtae Losailer; MS, USA CteTtafiogs Type: gypsos33 Saos i-teigk (os): 20 ta/o Tyt: US: Paos F Medsta:T lA^XAOdOAAS TtafeO: PSP ssyofAfAomaSo: Laxo: i 974 i/sktsftTyfi; 2A CMosse: RS! Qaaofity ofTafttap SMesiseft (b, 50); Tssilssp;Tssvtft Pfe/ase*{ou ttsdt :>ss?1felot Tise etsetoeso ww seosMeied t rsitasft. ot syseesslj stapes of sslsooi 2,5;!, Whn ise emtasokossos; sesksesl o Sgls of SS feos, slogo BOlUoy tsecort dos; k>'itteft tasess'kg !o Soft: toslsitae ofeys dosi kta ozsteft eos/otataAesstidss.ieft eeeftstisey ondes1 tas ::y/:u::,:: tss'siikst'aeoi o::o::; Fii/d/e/' os:so;;y sosos dfecesifewsd, I tase impssusMisessi was tebsogoBsftfy ssfeiosdooesi. Sastre*; Auo:s::;k:S,:s loeldeai Moa 337 OssssvMkss N/sose: Uotaeoksi Mhiit Leseest: S ot Asiets staTta ayo Ty/se: y5 ita Idefedi ist pssmType; US Sao FUI Motsi: T tespsssussdosesti VkksBe (ota sos); lo*!dei i sdoro- .sriooI taie; tnddimt Type: 2 Citse: f'M Ostdiy s>fTskgsi feeiestsd (so, Ai): Taissgs Tdtt Uis/tose fos): io siito ffto o rip fio o : W:Ks%e-Fyp siiog oo s ts iaygf is v:o:y soft foasslstaoi soil tosstit !r ioMtky o site sMitstitssoi, los sos ooo: teas :sstHksssissd st sso issslisgs mere seisassed, $ m r w , Poosktaast, essi, 1976 ASM SNW. <S ;S HsFM f \ 3'*- ! y p>/< is-tTU AU t 5* Itesd: Mo i 21 Itasrs/Sftae feasos; Uosdesoiit M kii Lstsoss: Ok;T6s!hs|S Type: Opus Hegio Colf Osos Typs: US Ds/rs fili sVisstai: T sopesasisdssaeoi Vastse Cao. so): Itv'dau i loo sano e; tasi' io s ,:,'.. U p e / ' ; SO: ST C l ) * ! I! M e \ e /S -A . S.e, SO|i: OSO . ' Si , , 'i!'!, -> i' i?!,! sssesdssol itesopKsss: i i- o i o ,*o .s .s i .taisft: oso'sssO ! ' . , ,L Sin ,,s ; < , < ' ,01 OpOOOOSSOieO )S3 , o -!,< !,- i,<! -o. o s -i i ! i saoiatao't sossfcor sssppsfs wo* sodoo, Mesossstols/s, ift* ooos/s OSiiSpSOtl OOfsr OSS3SOS3VO sostaossl iSOtae SO'SOOs'':::*. Sposo;:/: S3 ;:os.:so 00 i-tai Posta;;: :s i.ft33 o:op0:0:s:Ssp:; ::;:;:p TiSssSigsS :ooS Ss;;p; ;.Ss:Soi.s aorosft a ft!g issssslo tais stpst a x a i itass ;;S:o::::S o:::PP' presSS PspsSo fta: :>:s.:p::/p:i sataoi iss ssscfeota, Otaeistg iS ossdoii ssm possMclog oooesAssssd ssepogs 'isifto sjoss: s:oSpp/;: s : : ; : ; : ; /: ; ': t b s softsssstaysesst Tis ssepayg , a ^ t soy, * s-oiso, so< se *< \.3> sisifio-s: fiLe o; siso .,,nvA>:resos <,'pPsota*'aoi o;e, tasssoy, e \ p i*< d ft; iso-Vo.!, r , * .-ehn- pfog, -i-pii-po', de ,,< : J . o , 0 ' ;<i,eoy sis*i mss& s ! S3 -\U s 1 Ssosppp; Ssoiib sso Oosooei), 3F79 AS! iTs'Ls US Ita C ia ita T T Y P S ; 2 IM fIB S ta T C-AISE: EQ io :otaiS: Op.; ss! 's, o, V e ,' i i i - i J <' O >' Ai' , s >' X,!;s.{ '. ! U ( .3, l'O 3 >"i ' 1 sois.',/- S: * a ft , s sm i s - H - v U So J * itaos i'p y I 5 taso lift steos i, i-a f.ier,,os,`rs . S soe (us sos oesftei- !o3oe vftoo; S'S,s,i,. ;ps.SP., ;ps:: laossiios !:ype; * A t w e EQ :C3:ta.s:ota/ isl'T/ftliss'ia Resisosseft fesj. m ): Toiiioga 7 :'::vs:S: Dop::::;:; f/o): ip-psispiS PeseripSors: A : 0:0 SS p:so:SSp P:S;P ssoppaoifi/sg s.;: taso sxxk /eaaftsog sspssrsimm aoperioeosoi siooag siosksog: iiosiog ta iLi/s/s/s Pfeiftss e&sMsfta. The ik WS k;iMz 29 imks kepi:.ihe. ?ipkmizr :apsi !4IK fees: 1 P$.mSPPPPcf n Se.p. A.ed.3 feo)/, Al: tm jpig ()f She Attayos/i, die !s'OIPftftooit i'Pi iktP te: SDP;PP:ikd. Ptatei-. bkM \Mi 0ipuef! t were obSOTtap P'sitaS3 iApoooftd SMim iliti lite ip the P'P /'s:tPPPyPt'P Xtf p i p otstoeos; !:i: lisSKslid 1:0. m ui^resm iitti>P PPI extended Sfcstigh tlte iibitei;fit m%p>the .PWPt!uasp dPP?dip' iiftqpeke jv mm evealetl:dmt ?he km iPCPp?rp.j:pd .P: Ppw m tai rame dmt rwm siifts.og llS:g- to tkpradetipe of mmriymg Imiig;y. .p>:<isem bpp coekeipi dte Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 115 of 145 ED 002061 00172724-00115 same iropeosfeswl Site s3:td ot teirfesfes Dars S:?a;?fe. Safe; |4 SA;?;?: Tyrrr: US sesteos mists gsrpsteoso se simnogg:, Das Eid Skitefei: E: Ama .r<r C alifa Dopi Wafer festmmas., DD, tepotedtete Vsstesaefe?, m)s s Ssfey s Dorso. ife) la t e w is a ; Dote I9TI la??;?:??;?; Typs: TA. Cssfese: ES. Siasldgsrs: N.,r 36 0sm?kte Usate DsahAu' Mins Loteisa; Oslas. Dsfaldtogs Typs: Dom Hosfetfe); 3? :DsssTyps;; US Ors F i! Msrfeol: te fe tetes V feste feg ss): l a tir te : te rra ? ? ; Q fesilfy srTasIiog felefet fes. as); "fefegs Trassi Dsspmtmfe):: Art-SA? a ? i>s-s.aa4as'?fe?: ferrrrrrArrrrr :rrr sisa; fe;ara:fe adA'm i m fe. fes o f f e r fe ite lil typo fepotssrfasmPS: rassod omofe fe s tig ; So fe ; msfarkmeste, KUssssga wssss rgfefcoi sssd ids s'iiSrikJTiiS'OS ?'ip:f'i|5p'-S. Saaraas: ferlSA Doto; i 0 6 tstedsrriTypo; 2A Tira??:?? AA? Ife fe s y sTaiiings E oiteM fe , s): B A M CVAA US INCIDENT TYRE; IS 'Tsifefga TraV-fe Ditepeo fe ); .wjfetH Dfe'fefeijfeiife; IN C W IN T CSIiSRs AO Ti; itgstntm syps sssrrtetkmsia; was etefectes So a S?awife ;?SS Afe; ms 1.fe t siopss OSAra rara: s itigidasSl Ms, i OS SSAa:afeSferrar feSrarasa Safearra: N a . I fed DIE Torrgosmg teAqtete Tps arsa rarrrarrferrafea s M IT ; aaas;s aA aak, a A4? ; a aaa; ?: SS Mioa ffefeofsois: Cbsio O sferilisigofepg: cosgpor sioys fa r . and mortes fegafeteko o f aaagaarraA; feaarfea; fa st S. Tira ai;;;?? was kssssfa 4 P Sra; rrfer; |g km. S?;::;?; rira Eras Ara: aS?;??:Aa, Oassr ffesgid (m); I Trarr Afefear US SDasis KS Efefedtd:: T rr::.;iar;.r;ferSrrrar:r: v'raSirrrrsrr ?ar; s'ts): tepteivdy. Dsafesgs cosssifej sii erstes ob Uto afev.fe;airaferfe ?aa;fe?i;;.:??;??:??;. iaara arrar SaaSa?afe; Sarara Sr. !U fer i 1rS'ferarrrstsrsrs; fe SlaTS-iEPS seoerspafed S3? bolls mvi fa ite ; T*, Irsoidefe Typo: IB Css; EC> ararasars afeara?? Tiro riara slid ???:; fri satis) te stisi CJsoabfe o f Tissilagir rar-raraarr.i irar. m)a io seofe. Tadisgs Tsrrfe Disfegs fera? i:: MsOLgOteSfemsfa iasppsfe U fe isrUtlasrs Bassipspllsro: Tbs Ho. S? rirsari rarsa ;rara: ra. A:a Srrafe srsf pro a. feas; NT?.. fe) M o i S.?. ),ss rrraar :rr;aSrrifeaSfe:a fearS rarfeferrrr: DamfMine Msssss: Sosos Ho, I STtSSrO aoriifeifeasr jlVf.S? L'$C-SO>-" <2 S? S SV 'iStS A VmSS, S99 ? O fefailsqo Typs; oofeses Dos Usigbf siso): P Bsssi Twos: US Pnddosr No,,; i s)S D im F ill M ofaol: T SSariferraTSrife A sm s;: SArarra N it, T isopsfam; Vfesssg (sa, m); Mi: LciSgilo: ASrifs i SSU fe r SI of???"a.-fefefea OmTiiibsgo Typo: r:rararara' Dioso: 03-fa* lif e Ossa lisiplst fe ); S S:rfefeferfe Typs; SirA Ostras: ;T() Dito Typts: US ifearfe 22 HisrsAsrl; Cfrwtessy osiTosllsrg Released fe , m); r^POiSiiiClf;:ifl Safe;?;??:; A'raviri .DSSbtSIOi A n: Soairtfefe Arfe: Irte?:;*?? Ogofegfao Diisa 3T? i Tifo No, i dossi: Por! H fe oimsterete) 4#3 i Csmo: EQ tm z e?! Qg|fe o f T S^rjsi^ ! i Tibrsgs Tssv; r o s a k f a t e s f e i ! oss e o o .;, b u t. f e I a rfe iA a rr IJOSaripflrs; smttedteote did te ! imi. Staso:; Dolrry fe Afete, 19S7 T b s N o . 3 s ) a oe w a g : s n s s f e g m, f e s t t m o > 4 I s ird Us Lsgrso safeposlts, asro soDotStS ramas DAM: TUBE; US W eiftiS S I' SVAA: 2A. INCIDENT CAUSE; ER esrekitsy, boos Aar.:? msd ,AS:<?aggro l i d i S i g i s d o M ??:?;.. 4 4 m Y W m Hamg; Cpismo Msg M its e L o e a fe r ; O sP a rrr, 1 D A U S A Ora?Toilsssfsa fepoe: s ife i !ssMt HA,: 5ST DsoalHIios ifers: Sagoo Hs, Misrs i..rferri:rarar ChiiS: OrrATillmps Typg: ssppst Dass Ils ;sirs Iasi: I Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 116 of 145 ED 002061 00172724-00116 Dem Type: US Dem. f-'lli hleteir T letyuertdeieet Vle.ms-feu, ru Spara; Debyy am! Aliatesi, !!Ms7 leildem IefenmrLa m D e l; 03-2S>4965 kreiset Xysue 28 eesr CQ Qaaasky o f Taiimga tesla;! (op, m|: Tmel Piaiaaoa (a;|:: U:f:rUm Bmrtpiir; The Ne, 4 date mas iyasdae si llig idae s i ite V!7- 44 La Liga sA|yste, sr.d ssifste mteur PreKUUt. Saara; Pdry a:ad iie rtte 144? la steste Ne,; 37 DsaaiMiae Noma;: Cases Nega) te: s M s : , s. 1 tei,. v Ore/i'aiJlPgs; Type:; eepper Psi Heigh; im ): 40 Date Type; US B m FOI ite ra s i; T impoacdsserd Vssianra (sa, m}: IaMSete h itt x m ik m t Dei::; ;C,T|- i.;;o ::J: : Type: 2B Ci;;;;': S Qiixxti\?e f'T d H p s,8leased, eu, :u): Imdegl: Ne,; 70 DdavlillOs Mate: Loa Matpad Ne, I Miss Losadop: d ite rteTsilisfs Type: capper *3 i L ' ! i C i DatsTyp: S Pma Ci|t Material; T Itepooa.datete, Volerne le, ml; tadsfate l:i%r:sisi;i#ai ste: lMS-lted Imridsa:! Type: SII :C;;;,;; Q Qoaatey se Tailiags feiessed (eie. tei: Tmeel Dismaee Lu): ltd te s i The Lurn uupenurieiiei .suemi teste -domi, te. Tiinp 'Yseei Oisec:e (r3: i i}pi?p$h>n< I le Ceiw 'Neg:nc? 'Ne.. 1 item ;isas iuatLie m m m ci lte 41-1 1-e La lig ilie ee;'>h|eske ami : i. le Ne.: I i; a BuNsi. 1iaekieea w im m p as l \ '?i Ne, i datu e&p:ertuee:eu i'jw kM e el:QQ i'ii ereet a?sd en stete!I slides, Stmare: Dohry arw JA ii?, id47 trete; 'te,; 'S Cam <'ite Nome: Clero tdisgr; Miao Lecadoo:: a i le 1 OrsAralliage Type: stepper :MV-Y L:>4 La Ligia: esslapaa:4V 'Ssi s O** iu l e uuUse Laa ! 'as `> ^'>1i SxU' > i>u. The Ne, 1 date teid -, e" . a <' >iv' s>^ U' ru eu Dam;4aigpl (sa): 4& i;;;;; 'Ivpe US Dam Fill Maa Itepo:radmeat: Volarne fee. 'I passte,tetri aperse . d : 1!<;?* ,', -,:',! ex1 da; ;;;;; sassi ili;;;; s; dip ;; . ; sdestopes, te ;;re ; : D;:;;;;; ssii Ai;;:;;:;;, I;)<te Ite ;; C54-:fi"IS3 M idem \ f Ut stete, t% Qsssllte a ri'd llsg s Rekaaedyse- my Tesiipgs Tesisi Dtesee (so): toetriem Us ; te U ,m tea,e Na a; i : r ; J , Sa*' L; -vive x i s <; " " id'S,p I , gx' Iselditel: Peserpllo; Ttse Cerro Negro No, 3 doso wss maeltee al Use i;:;;: ai die M:7"? I ; I..; la;;;,::; essrytsphake adjeesi la tese Mi:, 3 dsmr tefeteH fdlted, IN sktpss a:* A;-;;; !:d, Tse N ii :l: ili:; Ite i i < H M(1 ! ' - adioissdg laaedil; Na, I a ;;;, eagiigseed ite s Pp M , Use e C `te s J ; T i a a Sans ; sis; ia s : ai anssldog aioag tee orasi aste siaal! iiSIdes. Salire:: Deslarg aad Aliasse, lite? teeideAi. telar atcs'r s , U ,,, ; te ; -S'' im i ,",i T- ;a 2B laeide! Nfe,: 4 i'iSK' CU Seaiteltee; Tdsro:; 1 Cola; Smeli Pese s te te s te :a: T ariasips IC;l i ; te:; (c ii, i ; i M iai i:;;aaia;; CSlils ISaI;;v; i TSial Lrisisoea la;;: Qm/Talllegs Tpps; copper t;;:::I::aI flessariptoB, Dare lleigl;t(m ): Ili; lsa ItepomtdsriaeL isti|ieteda| 3 Saisis, had DiipTgpa: I l i !);;;; FISI Maiili; T Lee abaadrmeri fer 70 yoam al, tes liras a i ite liaoaimemeai Volpaie |ea. mi: dSSXNO >TN Le tJ$prUeerihuuelu?v. I le embue.beeuUs 1 luddeul lelueeeirtieur u. m m m ipted yvkh t .4: i shepes. Pute; -y'i^y.1*65 ih^ueke |ssrlusred: eruek:.?: up u> 4 fei% ciuep: irrerdeet Typer 211 Cueer. EQ ru i eu't.u:U r uceojTipeked hy seN-ru! Q m M iy o f leuuye Released: . 0: uler ukde:-N. sueeieO^ et eerrutiu pi' te TN liup i iu ` s (" d > iiiuekiueut: Cru>ri deh:uu'iULeu ee re h iueirieut B m u fp fh m i erteri Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 117 of 145 ED 002061 00172724-00117 lb " i i ,v Pi i \ < ' 'A 1< At J> <i i 1*1'' \ >'Y P s " ad 'U C atr, \>^ vt' ,, h > Ssd,3 > <?'t-> fy y.."} A li ca-slstfaici' nsn V, ^ % ^r \ f s <n a ! v i a m te L f V ' j D^' ^ v\ t. * '0 Ose y si s\ ;c i > Oi ' L t i> <' as* i,a a -' WA ' .s, i stS.se * "* i < > es ale a ''ataa,'.! ih,- S; ito * 1 c. J N ^ . '!iS, Pss 1s d ssss -,,tao .J i.-ss i <-Si ss-s,sr A.-tssm- 'H .-r s-el M -,",., m i PAYS TYPEs OS mcrOETST TYPE; I INCISENT CAUSES NR IttestSatsS Nss,s 02 DertsSMstss: NMtie:: PCS Rsasmasd!) NSme Lsxsidos: SstsIwSSiEesassss, Csissssstss: OtsST&Hinp Typs: potasti O it -S s; Y ' ni 3 D T fte : US Dati POI M arsi: T itapseisstSsssessi Ysiletss I sis, :sss) s Isa tRssS tM sritssss: D is s e .; 1 9 7 5 ! jg.; 3 C s u s e : C T -sec5 i ; < n V ; ;*- 1 d : Ci'iSc L Tf Y 1 ,, si 'a # <' :(m ^ . i s i, t , i , '^ H i " Jf{ 'i ' 1 34i f n i U {3 U i i ' J t'' ^ ^ * AJt ' 4d * ' < * 3 i i i t ( i q > 4, i '> fh i V , > \ A ' , U i *'< 1 m t }* l i s X 'i ' 1 i l i n U i 4 i i t.v 13 , i<i 4 i , i ' 4 1 u , ^ : > ' v> fx {>' s " > a'- 3"" vX t r 34' '0 3 ' A i <>C / 1s < > S ' i s> ic i v i t e 4i st n l i '-{ ' 4 c J M , \ r i t i <:<'> iTv ' Vv \ X c , \ i i ^ - r ' 4 i J v i , y ( > ( ' i n \ s A i i 4,i ' i" h i 3 O f i t i<. io A A \ * A j t S l u ' U t ' ; iO ' ' y i ' 3 i>' Ci k J , 1.'4 * V f * ,-'1 -< ' " , 3 < t1 t ' v h . 3 >' f h b - i \ s )C N 1 -i i $43 f - i V } s Y ' O ; 1 > 4' M< i ' M J b { ' ^ v r - , t - Aa \ \ A'Y ' ' i , ' ,A < i - A >aI ' 4vi 4J .'}# tv ' 4 n i < > h ' iC ik 'i si ' 'n S H L l ssi ' <o sssesa 0 i i ^ A > vi A S^ }>A S a s s s i T d e si s A S ;L I s e M SesYSens R#; SS Pssm/Mls Hmsti: SMC K ,: Misse Loessisms: SgMAehswssy, Csssedss Os-esTsisIsslpTyps: sssR$h ipssm HSsIglsi:<ns> 30 Dam Typs:; S Dstsss PHI Material: T Smpeandasesst Videras' (es, r}; Isssdds. I A m m m t 'Date: ISSI tsiesdeas Typ: 3 sTmssss: s|):snsn.::;y ssi Tssilissp n.Ua:nnxi Son; ;c ; PSsiSfSg Tnonn;:: Pissia fsis): saeis;osi Ucm n-YKsn laa dike kir Lh impi eiesl ssf sattip Q t i\ csr i f e r it e d dit noneh >X'};S iiVi:hd K&TS;, ;Ayilsl smd cif 1: m< " ii- h ' ' { it < i*s> c ' ^ * A' 4 >vO'.t,i K ~ A.+( b / d -ms As CsV V ' '< Is d ^ J 1vi' ^ o , es i V >1 A Sa m i. <<.n , -5 J ,, P ri ' \ <,}<> >A AiJ <'V i it ' sv 'n ' K ' ! it <Vs h* 'v i.' s'" a ihs* i i (M ii * o - n i n p p ; < t <n <. s p i n R M t n mNen: San Sii Psssssi'Misse Nassa: Pierner Hss. 4 "So,eon:L;o:.o;.o::,o: iV'no:n;::geso Cssnay, ntO. ;J::,,S Ore/Pastlags Typs: festst & Hesgfst ist): PS Dam Typ; CL Dass: Psi g isapissdissesst Vcdssssss test, sis): L i s n . i e n : I l S i f e t ISS s ltfe s si S Rasa; sai-si-sas s bdslerss Type: SA slycne: PH Queasily ssPTeilsa p Ralematl iss, sa): Tesisegi; Tsai'H DUsesssseSsss); iSsessMaA PPsrSplisss;: "il; isjsfias'esss caisse ed' fallare '*'41 esistssslissessl stoll;;;: alssssg sesddssaS ami elisiasal SAaesdalism soOa, Tpse tailings Howstltk reeetssit a seaRsy I; ssss y sasi ila - , ssesed a csssek. H'1' 'N -v s (.Vf* t<:"K#fc Ras., Dam ssssd SX a s ; , , iPm, Pa S ' a y'S B A M T V P i: C L IN C IIR L IN C ie rP T PA U H ; OT U 1A Isstldesst f,: 3ss4 PiafiSMsa Saasisi:: No i SaillsSgS flsSS'SS Hlsae Lsscssasss: NtsdslY Asm, Lsasseassess, s'noon.So;;.:; - ' s,s a j\ Syso, ' X,',! I 5 H t >ijs ~ Dam i> p O' sv.n. s* Nsssersal; E isiipssssMsmesiS S'sdssssse See, sal: 25,0SO cosso; 1ssiersspties s Des; (MICA i 093 laessisasS T y p e 1A CessSs; O T Qsssastsly i Watet Releases! issi. m f. 3,060 Tailings Stonooi Distane fm); teasPesit: PaiaaS|stissa: y, sosS Pltsiisisl ;>: scion;;;:;; esasda. Isy assisse aeSstssl. Wsslat esifdslitmg Pdsg/ilss mlssid sssSts Tama? river, Cassas: salsid Aslstsp ssilasaed ses Ate sc'xss'c essat. Cssstt ol tisssiodssstssisi aatssissstss>d AS 30,000 - 30,000 Ssistaat: ttsapaalsir isf NSssstis, Taaosassisi 1AM TYPES CL IN C tP IN T 'PYRE: 11 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 118 of 145 ED 002061 00172724-00118 IN C E W CAUSE; >T Tssiibpps daaaal Lssiiigsscp(mL IswddsaI Ds-seriotems; palaisos be,; ill The t a svasi aaamaaaaaaaaaeF asseosopsaiste ayay Dasa/Steas Nome; Mssmral fssg Hm ssad gsisvcd I sis dsiwaetffioffi slepes e f ! ; L s Lpeefess; isteitestsses, Bstestes Cssbmibsss Cosisidersbip seefsssg ai iba mafemkmsste ma OsteTtelssgs Typa: aamaaaad. svilii slassiisge asSoiiiisSsag o i: sgalispS Dm Hsigisi{ml; 6 Dam crac les te seps Rii-adlel la t e caite isavlag a Typ; CL PsspsFssi telsriai:: CST eaipaistesve Veril! issiteaessasaste ssp tes aa:mama Impeaadsaert Votante (a t tek sm i! S telre: tesis, i lb inte;;;; fteosteSSlOSS; Dam- 133-20-i FIS ssstessi > m : .$m.-, OT iteissply |'Ibllbps ( . m): IIAM TCPEs CL NCDNT Ite N O D E b T CESE;: LE rbiisogs Trs itektebkD4(my. 1 m tm H .:s 23 ssalsieste D g^rlpii-ESi issa8::: Sill Assss brasseh m m by i:gk pond: CiV;i1<>ppk:| M k i L M k as; Matblssao, Taesrsass >a'.S Ds-v' v> ; *ik by k z burbig ofisd Q m /T k}ki$ $ Type; 4 S '> s :s <s ' ^ 'l' ! D$m Hdgbt iiTi): Dass iOassC v a * v r I m m m k ObfAiify M im m ty P ''S'S}>1H,' i j H 'v<> VlC.:.C:'f V$V 1 Typs: CL SosaFill Msarmb E 1 lfpfjtJKbniil Vobssssa(Css. sss); i iS,,: .S, > Mesoste; laformsstei Disia: i -E-1995 i* I ib te i:: lACiSENT T V 2A \ m i D f s r i m-m-. $ t !, sses; su ' 'a s's, xg QssastesSyof Water iiaiasssas fea, ra): siili! Tatimgs flava! isSlssealas); Saca tea,;: ls Dontese Nosre: ,di Na. 2 Ma Locabaa; Wteshssgtors Cmaay. LO, USA OsteToiisssgTpx: 'btete Da 34sgbS(m): 1 i DssssLTypsa CL Da.a; F! Molestes!: E iaesteeoi: Pescnpiiissss Lssolssg; si mamdammmmmammi. aamaa ikisis base of ssapsssmdsaaai irne gassmte water. Sessi 1:2 sksivssssresstei slap, LosId arD. BsIIs5 sseafba baiar sa asssrspaalsai maaya, a;;y lssasi.: damaim steaams; lites liL Oossalioo a oparasisas; sswsser iasgssasrfiteeoS 1!, al); i citei I ssteraaii oas; 'aaamaaad Esarae: Imsteseser ai Miss, Tsissaasba, Date: OMIteRCS bselsiesss Typ:: LA Caos: SI Isicisieste Ns., ..te Cmssstesy steimbisp Rteaaaasl ite ); D ao Mss; ' bao <.'v-JfUS Th:pS? :i k Ttellirgs Trite! Disiasse: (te: bukir.S Drmnptea: teui'ig ;temi Rdteag a l ih: siarter siske, siami ami Cfiurits !.0> USA Typ%\ iolyb^Ui^ Di Hd^:b: (my. \.% gravai salii ssicel tesili affisate lasas aosssagi teta stesi ssa fili sa lisa do#sssMs ponto o f sii i -s-1 i v; * < t V ' iii t ti v v Impmmimznt. Vokme{c:u. m t 2:T5.OO!O0 ates, Tisis: disi noi pravsd s:f!1:csat ssrasoag, i s$d$st' IxifarmMUmi arai a siici asstod sia so Ibis tsigis ptoori te. A teS-Sl S; ' :;:vl ; :;S; Ol as plissteil la o Eesgbs a f abate 41) fm la Dsitii: 9M ncmi Typz: 2h. Cm: SIE Qu&tisy of Tbli^p Eobsod (mi. my bte'" i"v'i U'l>\K' 'r alab!ID lisa: ama Veorcc Mssater Dagl, o fN a t ite:,, pasa assd Resertos1S alto Easgosm hisktos^: B m m ip fm : Ao. mziimr? ^kfio si lk$ oibiokilooi Um !:<> mm . opslog ^00 gpm firn#) w m ?:oo.d1.0 !?o disfoApo'pp Hoeg. Fyri'bor la.ssieste bes. : 19 Usisi!:as H&m t: Cpssias FDi. D&rs 2 bissts Lssessfcsss: Aasirail O to tasaags Tapa; cappa Dosis Height (iss): l i Da Tese: CL Dam F ill IVL:trsib E Issspoisatessms Votemi lass, m): isckbsaS Soiorroatso: Dose: isiefeieste Type: 2A Cosso: SI rovookA o nnkimh I io # l m 4A m> im m $]%%% o f iko asssssssfa:steste iTse. saigm.al telass la:lodte: b-iocls sim FVC) steps; tvmiipt sa Fslier ;Irslb, ors! il: sa lltespgisS ibas isas mms of ibllssss:: o; ; E:lSr alasi; aasy him&>;iv'm mm Pis Ratea ssate 0allibite8; ibrr>;-:M ;b pC Stesa:: itetesp Capi, Wisier 8;,,. DosaSaib'ig SOPlkSO: Qpaaissa afTaibags ibdssssci! (cm 1! t Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 119 of 145 ED 002061 00172724-00119 S A M I HPR ' ; fM iH 'N T T l'fg 1A DAC1MM AS, ? A ta kte ? : Ass*: AS IMsB/Mms; As: Bsg ro u r Mim Lpcapcs: M A If? ; PL, USA OisPTasfisp Typ: p te p l B Dais Msgfe CMP Dis?Typa: CL srrs Fill MMeatsif: S Ssapsiadsas VAIsimj (3 . rep uick;? l?fK!SM ! Date: DMiMMMM itefcfcte Type: SA CSte; SM Qpasthy .jf T s ilin p Messes! (sas. s?s): IMilmgs Trte! D isteis S;?): !?sss!es?tDes|itK?s5s TL isedslessS was rM d > MkhplaMate! tebsMstecs? te ste kssseSssss bsteBtepp te!?:? :?'s ?h>s da?, which rastete?! phosphssis Mby jisssaa? Mss M is te sifters me sssMstsse. Ssiisrse? Assssofotel MeMSSS A'if,; g'?! ' H. ? Sis ?' Ma' Sv \ s Sa M r,,* Uvaten Mb.a;.. isstea 0:1.: T;ii :S 'T ? ? :::'. 10 :v?5:S-.:S:- i i, - H -sa n f- 1 Dan Di'a SA >rm SsUMe;x.'>J 3 3 iss sia s'i i'i'iiisii *iss 'A S iififfj sriiscSiAiasi. K{. MM <rjtL*n ' h JA '.!j-~ MM ysa' 'ii Dabte.. F J? j- .s MsSAg- T"*- '! D-, ss'a'nas lHsssSess? Itaerspm: t e <,mfe s' n 5<n -astessaad a!s?: h i < n >s < n n td i ' n * i- s>> * MlesAAsi r *<>* f si '^ < S Sn s ^ n - * i' n ji S k : p?>?em:sa! I? f e ^ n a h i k i T a f e n a b f e C ' < <SA P o r t i : 13SS O f ?3`i: mbsnto gr T:yg?::i n:fe;i|? 3 ? a i A L h Mssg! as !U SfeJ < fei sfe i dSS im m Nex 162 Ox>:'<:? N&isig.s UmfeeafeBed Mme H tetefo Coaaty.. PL,. USA CAfeTsiimi# Tyg>et fkteafeae Bim Bfegfe (m $ A D&mType: CL. Cm RU MAfen&L B ftnrnnnfemefe Vfenme fee- sa}:; faeklesn k te nanntet; t e : \971 laddefe Type; 2A Caese;: FM Qmmky a i Tedfefe* tele&md (m> nfe Tfetega Tmeei Dtteeea teT h w b m i IAne'l|A^i lin : kmamjifeneA wer u te a rets5a nsUngs imm km.est^ee wsshfeg onnifenr te l fer ?ns U< ;feeAfemfe eisv 5siLT?i;S. Wies fee embsnkrsnSA .f.eechek s bfefe f abafe 2 feet m m iiitiM - seepge m pi$m% j fe fenklc kmndsfern idfefefeae- aeeerred fe ihe I enfeaakmetk *o&> A email ring dike was j. eennnmied meund fee imm> sab W&ter teMe | Sfes. sfenwedi tO P M mdd pressure Aefe hsteaed ! seaps&e g&k pmmreSv. Ho: .fente' pipfeg h x -v&L A?s::Ccfei>U j B A M TVPE-: CL !fe1!)lN T TVPE: 2A | IA Clip iA T CAIJAEi ilT \ M M g s H& Ui j Dnm/ypn: Nmn. Bfe Ifeur j N-i^'Eptefe^: P^iik C IA PLf USA j fATtiiki'sg! Tvp<?; pfenpfene m n HPjgb?. (=n-;|; i l I mm Type: CL 0^?^ FHI ^ Imaaad!seat V o te s ;(ce, sa;}; te e k te t Irte e n te iit Cafe:: ISS 6 feeideei Tynd; .iIA Csnre;i S" Q ^a a L fe rsifTMUsgalefetS''sd (cti. aij: T > k iiiip TVav! Dkm ca (m 1: m'imt Dinaa*!. M sisaa! |dp sasidas. eendai per-eka.ted dm d;:aea w hich isneeeaik'd pbSjhetfe elfe adnns. C s r s M o f Stoa pspe aaased dsn:msi eieasieri te mmtt?3i :M! aiads iafe 1L t o teife :aeasi.nes 333:3'ii;?:::?;? rppaM p f te AfA te k fi of ertetenvnn $oih> *te r^grsdfei;, iytire%: nitssiltiftl bU iteni A-xi ,:>a. IM M \ i''t' * 'yioi Ite MM CtA'pA !P:, USA. O telllfegs Tpi; $|i:vs:r Bm t H ight (t^): 2 4 item Tvi>n CL; Omn. PLI S'fstdlL' T 'inLputenejE V^kiinn (c^-. niL 215*000 nUdsfe: 18(&r$isMluu: Pitg; teP6:>:lPS3 :xncfefjt Typii; 2A Cuxn ST Q im liiy o f IfeO fep ( ci, m ): Tfnvo'' CS*',1'-v,'"vx/;'<'>' % ! i'Ap.V P' Hi .' an %jtf ''pi s de ?f?tg *' y<a-Aitijiia, if jteA d ' i Aid SX ' n h de .3 .1,<* i. 's' i- i v<}f> ? ts s' 1e i-: (' ee ''U l <i , t-rpa -d C '4t <f e.- Ao '' ;o 'V <e'i 'rJ etu D 33 s,*s a i 3s- <i ; < fiTt X ' l ' t X ' t di^Siee s i . D ' A'e' ' ^ ' N Sf>s x ds U m m T m % c i iAciPW? type; m IAOENT CAUbEi ST n^ PL Oam/Mme Hm s : Bk^kSAA Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 120 of 145 ED 002061 00172724-00120 M m LossU m M m , ID, USA &DTIssMngs Daes HeiglssCte; IS Oese Type: G L se fil? tesSrisb M W SaspeeateeaS VeSease (sa. es); S,B0:s8S!8 Ipg ifeS 'l lst9W 8?lS: Oter: IfesSeal Type: SB Causas ST stesadiy siTssiiissga iteeeeed fee, eab T alllap Sraval IsWsea G}: M ette: S'Gserpi iss R . < < I > < s s f<! i l ' ` te ! ISDCs wilb si ssebi? salve tu pass gr;!! sSiMstffksWS 4&m hy\pi:M&kt$&L 1 < <s S <U ! > ' s >? 1 < sa< sseeefasseal bastes esfeied. Isa e fe te te Ssblirsgs w m dstesassed y she bavwedteare desssrtaee: ban petes et high Saw iseekssssegeda * .. Sapas: fefeaae Depp Rasa L a te VM M iV f i :U M triste? SV f f , I tes. uifc.fi 5 s a s i - \ p eatsfca! pte; S! D ateteas Ptesse; Geldee Ssteigftl Ripe Laasiess: WlsslebstC MX, SA Drsffalliag Type: .pies Om i Mesial (p j; sa Typa; CL Case fait Ivlsbssfe: CST ibtpoepdmessi Vdlepse Ma, te ; IpsMessl laforsidsfs; Dele: OS~?11- 1SSP Ieeklael Typa: S Casase; Gaasiy e f Taillage idlleaaii! fs, as): Talhssy Travel Dssiartee fAs): lariMess Beserlpll; The seepage csahb:! gaiera eoss&ucibd fe r Use bblpga Pas bselerted a p rla aey beosossiletedrry c d le ll' w ell, irsgedte wish dtessa beasalh lise te g e a te e d telhags asp ibrasdalse preprstabsiP: o f ataye aells iss Ose sesprspodspessi are;*, The saissii sste! leaded es sleep :ss 0 fsl 1er si riapassoealde alseSssSss, Teillage d ite s : begdss iss te b , 1983, es! eorseesrealbss .a, sisslecled 1 drssypgsfetes essieispe w e lls la T l y, 1983, l i le esdimssied Ibsl 1110,080 gai, o f eyssaldeRetessg eileessi isaiesO pas! sise siaery easafi besweee A p ril 1083 assd jaae , IP II4, wills avesssge: eeswapsfeleea: p f I J seg lo le i assd 0-3 srsgd free eyasside, Tlsa sdsssrse: fas' lias leakage le prsswsssed ta be ass atideteeied bsrAlbde-relase:! dbseomssdhy 1 the iespesTsseo:die escaiisps Osai o s as? fssaebaOad by ibe: sssielT 8e:erilal sssessews laebi'Peb re pair e f sise e s s a lf ed lasseilaiAa f psssspbsak w ails iksp reSssasesi 400 pssss Ifs se bapssuadmessi; II, la Isebavap ib s i tisoeae aseesares were e ffite v e la cea la ialsg tePser seeplge, Cosrissaed saigreliPls u l We arspssal eostabasass :plsse svaa s ol eapessled le resell Iss ilseellsb lase o eserisoissaboa bs aiiiaeeal aaibsee e te e W. sas-e Id suss ioapL iSlaie Lisais DAS ?SIO : ;> !0 | Ir ifo o TY?C: |A i M 'i if M A i A SI Issasslessr se,;: 144 issi blasss rrissse;: LsfsSfleasIbed blisd Lepeiaal Usikx? lssgdaas Ore/Tadlaga Type; aaal tbab Helgisl fasi: 20 Das Type: OS Ite RII refaites!: Sssspseadriseal Vdlssese (a, :); fisrldeai fssfbamail;: Oab';: 1902 loeMard Typ: 1a Cause: Si Qfssalily a i Talllaga Rstessd (sii, rai; Tasliags 'Tseai Disia (tss|; laeldaSsi Desespess lise Odiare faeeassad derissg regsadissg ispesallaas so ssabiliRS fedlglssg assi dsfaeealite ssf lise dosetBIrssaas dass: stepp Dal bad sseeened two asaslisa psswlrsesly, Cessiriidsi!d:g iss Ibe fallare psay Isasas basess sise bss bsssposasssisssessr daa? leeeb dee le dispiaeeaseai dy sisse sve-ssa bdidg regraded teas sasffacessS pile, Tbe bdlbsga Ilesa ilsre eeeeiei! ess reaas4 ias riessersi 1' >p" -s ssd T -d , '->" 2 DAM T VdC; i ; IMCIDENT TTter IA fMCIDEAT CAUSE: SE fpesdeai Otes I8 Dasd/bispe bOsPses y :ldeadfs;d Tllae tecaeca: t a a kivep i: L :OSA OrelTalllaga plsoapisaie Ossia: llelgbl |PS|: Daas Type: DS Darsi f ili Malesaa!: E iPsppseadpsaps Tebsssie lese, ir:?: fs ,< s s i,!: Is l'b r s e iis o s s i se: 03-81-194! Issekbsal Tgpe: IA Casase: SE Qaaatsy e Tasbaga: Relessaed (ea, sp|: Tgllpds Tssivl lalaaee fesf: eosirnt Cle'terlpllpsst Tb dasa rsa brea ralsasl 1Isisigisi m m m l speislb prior le iba iaibsra eslag sm lili, Ai lis tesepb tesase, saalar -ss lessar 5 lessi dessp mm ! dhsesT sssapts svlb Os gsiaesa aee sf dse r?m., tebalisg sise isgsss-tese 'bewvess iba and ssisl lili, TAs ialiere !ss dasaglil le be reia{s| as elilser sise |pe:r|sssrasseee f ksgs aad Issasab is ibis ssriglPal psssbess o f sbe sieseies, el as eld: dsiear pipe feessd se ibe bspfo: e f sbe bretes, la elides: eaee, sgaga ssad plprssg sesee ibe m m m ssaaae el' liare, Tfee ebssaplsfe cissy aliases reieaaed fsesdassed: ssaapsas^ teste eopebeirabpria aa blgb as I98 ppps is lie fesse Eiver, 1:20 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 121 of 145 ED 002061 00172724-00121 kkiseei's?: .`Xsicx-sSetial riT K - te SNODEUTTWE;: IA m .lM V T C-UTsE: PF ifiee-Sciy B,; USA DassYMSas; Msisme: Silver Klag USs:s3PIVsa; ABbsssCvsssSg, SD,. USA Oris/Tsilisp T y p a ppsf Dam- BalgSil (m); 9 Dsmt Taps; PS Pam Fill SvSssSari; D tmpsmdme VAsste ca. ml: .P.CMX'I leestfcA iPlpnpllPai DP; 01-l -1974 Sasstes Typ; IA: (.1 F ! i s a u i > > TUlag Tmes! Saesa|s:S: laslAasaS Basarlpslaa;: Fa s' pn Fsj'<, 'f'apa.X castae As .sipimaSaS'.rs -s *t I m v.tpa.t j , m & m m & m ? asx.psesg N -asas Baseri m psassra ssvissmppms . m :l',s F-:a kl ; asslFsa psSSk*'' ol xAer ami s'" >s k !''> .3 hk mpi-maskS staSlesgS: DasxAs ssa? A''kfx: x ^ c m -l ol siltsag c?f *n'*snbvl<; IV smassxmsri w** -'yVemeiamip !' p - l 'i l J 'V - s ' . \ - , . T , Sx` 3 , i XK iS , Snarsa I, y.sx i D" , 9 9 *>i S . , P a x N spy D -U n iF ;P S SM ?PPM l'YBE; 1A m PP V 3 M -f : M PsHsfctxl Hass $7 PiiSSMsmi Nsi -sa:x Aastsv-saNp Alma t-peasks; Vmed SCgxfsjst; OssP'alllags Type; shma elav Dm Belgist{m p IS Passi Typs: PS- Pssra f ill Maiasissl; Fl Impeasssissmsl Vsxtme (sa, ml: D ick ie c k i V x r;mns::: : Daly: HF78 SaeTTyei Types: SA Cyspy; TT (yeess-y-Sy ofTsiSlAga RiVaepaxI (su, e: :e TAilPgg Tpivl DstiPaexeg: Tsey ia silP ! Pas?i|}llas Passa hreadh eeesesemei UsaiC s:K.saisssl ils kirs- safy Ja . s', J-as <arf- ie-fli-- i992 UAP ' a PF,-PF 3HUUSPH R Y ; IA S M 'IP fv r* As'F f; R it StsmVm Ta, S* slasss.Vsxx 3-, i I I I "m MewDam ,\|s-sa U".aix>3' s ,t le F>- Y sAsa- r',a> es<' as t !3S'<, sJ a ' 3 '' * Pmi 1 .p`- D : Pa r " I TlamflaS; CST ta s frn a s s fe e m V c s la a s a (e s , m } : 1 5 1 3 ,0 0 8 D a c e ie ic e Ip fe s m s s B lm K D a k ; s ll --T T -i S sel lacssUs- " a '*3 i j j j ; | | sg" a l I ! : L-e k s p ! i 3 i a , s a W p - a , ' s is s y . ` s x ix k s P iv S y s s c .,'s s u s la , ' v ' P suskss P s ic f Ip Is a , 1 1 , sliSSs V , > i- S , S i, * S S P s , ! . S ' S ' S S .,!!>' , , s i - ,s,J S s,* - y a m s A ux s I s s : > ' a V ,s > , s \ x s a s <,> s j a J c ,a s i ,'v a ' a * - eysc k 1 y ' a M v m j ' k m m r m y t s I m o a ' P 1 ^ 3 b ,d i I k i y y s s 3 s s s s l k i a , ` '> p s , , ! i> I ~ M ' ! 3 * ,s I g k . c ^ k S S 'j. ;s~ '. i l s , S 3 i ` e t . . p - a - i s f V ' a s ' U i S x K H s t ' i i ' i s ' a ,1 i s ; ( k " s a , i s' s ' a i ` k , ' S ' 9 p i s S x a f X' S i s , x g , g J a ' s i ' s S' t a ' ' ( , 3 l ( e , `, s n s y l Ia m i a : a S - SX a - ' V i s a ' as s '| r > -* p 3 'a 3 a > J < 's 'k J ,;s ik ` > a | \; a \ i ' r . a s l a a m a x ' ' i a c a r S S , y a y ; s r a . i ! , x* F s ; ; , x ip s A ' x r i. v 's x t f x sag I s a y sk S 'i k s S i s : ' , k v i s s s y . ' x ->k I' i ! < i -| S |,k la iiv a ' s `ix l F ' f s , i k k C a x k I 'l,X ' s '" ' Si ' ? I i S |, s l i , ' <` V - S ip i ' k i a ' C S . S 3 S XI p s i s s p l s , S P is ra a . P a b r y s a A V m m , j f ? B M T W & M H C I P g N T T Y P E : i S IH I K H T C A U S E ; F H la te M y ls l H m S S U i>3 1 S s 'i s i < x ! 's `sy. P ii S kie i,,ksesesss p l l a l R i:p ,p k i? ? i O A 's 'T s f f is g s T y p e ; s m a ! p g S i lis ilg ls (s.p |: S D as*! T y p s ; S D e s s F ill M P s n s l: h m p m m xm w ; V p |a s m ( s e , m f S 3 s lS s 3 l lip fy rp a s iS w s a ; D a le ; I f F i la P S s a t T y f f e I B C assas; PU ` `a,; fTei's ye, 9x9's-x:\9 (yy e:;}:. S 9 U I ss.sssy.- Is s ,< J U s k y m ' . ` : ( ; B i i.a x x s - s .i x K p a ' . i ;s 3 a s ' i ssssaSsBsi' ' a - li-'s is s s -s s . ' * 'A s a S k ' i a l ' ! ' C s s s p y y S ` s s l s . s k I T >S 3 ! | ' S ! " ' X S ` X ! S i l l X ! c 1. : ' 3 ! l.V >i ' 3 - S " 'i i l ,, - A a l y s m s n s < k> V `ls x V * s ilt r-s a y p < r e s l-y a v i l l a - , v - i i ' s x a i i i k I- a t k , y y P , a s m ; -x i p S k V i.'i p s i I i k i v, v a r - p x ' S i'3 'a u l s a v C ' k a N s x' ! 3 - < s ' i i k ' f i t a .sa s -3 3 ! m s ' n I ' i - ' s l , -s i - . ( i is X i k s g c a s y x x m . k a y v xy1 j , p i y v ' ! i i* k - '! s I ,i i , s i\> V g a ; c y I g itx fin t m s! F a ksa, a ' IP W n r U f t y S Y O ( , i D ? T Y F ; T A ; n x m fs i s - \3 t< x r s s C rs H d e s B : H ss.; T U I B i S / H l l a P iiiis s e e : P lis a p S e s a a G m a e l e A ls ts s L a c a ll is ; C rsasaa, u p s s s , i M a l l mpyslPgs I .... . gijld Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 122 of 145 ED 002061 00172724-00122 B o a s H e w TM s s y : 4 i H 0 , j l * ? 8 w ; i S y > d i X I ii m > s ' 8 S h , ' ! m o o s *. U r n a ; ,, ,, D I , M O S M a s o o i 'I ' O i i ., w ; a P a s l y p o ,, X r. i- M .0 t i i t ' x M ! I s ? T H s a . - o o s fs. < ' v ITshi si; r " P i h Sw t lis s i; sw > E 'C r> j!is * ' M,; r<!4 'IE - ^^ 1'>5^ Y*' l'~ fi^ \ l h S<i'i lhe- s Sii c i i * \- .T'TO' ni.r>* vS i ,x,>fl i i . > ' /v i { ^ ^ 'ii'iC' M *i t U . h \ 3 y {n j ?<CvV ' iw ''> i A , k \ tb ti C" i < " >w i '' r-sti-v fU -i r? u rv C ' t> h ' i i l t'S f si H J < 5si' t ' i <' 0 J swso h'* ci' , rU \ h ? s t '>a\ . i , Cl\ * >f*' t,z l "i ^ ; r\d ii' J t 5'A *i th U 3,n U 'e > fi ;iK y A ><v*' l II'-. ; A sai ' 'A v V V< J' iK 3 S fi Siif's.' i'OS io O o w f ' ; m,\ }lsf Es,s (-i DsiiwMioe NfiTsf: ttle M t Clidsl Mm Lswosios: Bossi Ms,, BV, USA oaiTodhsgs Typ: gois! Baso Height (sa): S Dosa Typ: DS P Psi! Msssedsd; E IssspaaodspassfVoMm*1(co, sss): lySdfhsl tapis!! IrfefMB; Dyif ; i 444 ffismiii Typy: 44. Cima: S! !Tani:i!y fadiags Eksd (a, sa}: Tsslilogs Trwai DisSoaeIs}; I m im i CvsfiiUi; isikhilily o f if dowssmssms skp. gississad y p-yiy yyyy:y:y::yy.!;y; S' fili, Siyy slop osas ssmams'Mssod as! SlMid Pyii i yy:: h!iis fiyyy. o f CtwoesyoiSoss mi No:. f.y.:. f:;; Wsoes-Eoa, ih:yf:p::;iy No.: 149 DaoVIylW H:yyy ij:;ikk iili sl .Misss,wetscs;d:: :Ef DSA O m /Tallm p Type: phssphol n<, ' i < S i , i ' i i' OJ s j < A S, '! f 0 < SpipassoslsaeaS: Vsilassse |a, fh foekis'ol: Sssfrpspslssas Das: ISIS t e s t a Typ: 3A Coa: 8! Qomsslsy ssfToihoi Bsiapsad |d. so}: Toiifflgs Tfsiyol Dyyyyyyy f::yy lao.ot Bos:.iipdat Tli sfos was: pooiroalosi ;yy:h dosoooSooosn yfyyyyy o f i y:i :yyi s: dosa mi liOSl !>osi ssdsiasi sh psvls siate Dosssg: te fisiog show; yyyyyy olotiglsisig P Sis dswwsohepss fS o f ili: slam siecamsd, asoompetiiod hp spsoooswo: skwsiskps resss o f iosa!! salttfsted SI! yoyii;.yy:yy hkkk: yi' Dooms :y::yf These yyyyh y.:yyy PSSilbtSisid to OSSSSWsmd ks hovsssg feeess kmrnXiSe dmsg wkssos imp!issetka of Sy ;:yy:yw:::::.:::: oiiyy Soiiyyy' AosedSa! So if: M hhs.: MS DsisyMm N ssf: IJoideosifed Mi* tossii; hkhsid Kkgdom re/Tsiilings Typ; ssoai fl&so Height {ss*}: S4 Dm Typ' SS Sam SSI Mates'!.!: MW iofpsivsadsssesiS: Voisost (cti, so}: tesisi*!: Issso sd lo; Dolo: ilio " fyypyy: Typs;: SA : St QSssoSily Hsshhaip & i iip d less, sa};: Tadkgs Tsssvel Dkteocs (m): fsssddssssf ooes'tptkiss : A Dido sjacorted is dte dowmstespso ilope dar apeHssd o f isessvy spi ssos! w wsefe &!|osspg wsdsii:ag f sh dom s fsy ihasspid! f asscossspoiiMi! yms Oil.. Boils sh sjsSjpmsl spiissoAiy mossSiijshssdsloipesi wees M so aogte s f rps- sosd a high phraad sorhse piaiod mislsi |h so:haofcpsoi, Soor: Thompao sod Rscha, 1972 laelsiest fs.: I SO DasVhftos hiooi:: ysldsshSol Moso ! o r s il, ! SA s.fTa:ilt:isg;s: Typ: plaisphssS Dam hklgldlm }: I S Doso Typ !?S Poso Eli! MoSostoh E ImpsiasEas*! Volams fa, m}: losilslooS: faforsoiSlssoi Dos; IE6.S Isisdsls'oS ly p : 2 A C osa:: f ! Qpaotlsy ptTallm p Esimasi (. m): Toillssgo Trssy! Disooss |so): tssssslsss! Soscfipsia: Th siaot aao hslslalsy fiosiosroasod sssd ralsd y::::y::y ysyy sssis! g:osvsH yy:i:.y yy y; skhASSOSaooiSS ' K S<'f ID :!.0. S!spe sshsibilsii OCSriST4. d.Uc' V* o f feiomsi! dpiiasga smd W 1i i-ji SSOiSyiyiyiiy Aa IsiSospo! iiailssags TA' arposaiad fos: spsbsoasoms: ridses :if idg - s 8oi at Aosedoso; ways ?VIT - sa i'w i f ; <v i f : M I B C I B r A i MME, r SiioMud Ass,; S , ; ; , 1 <- , o i i p > ' d i ' A i i X h ' ! I M lo , J i o ih n ''J a \ v f " 'd ;\ fs; po >- !< ! , Do s!,-- ss'ii 41 !Dr. l 'y Dios! ; V| y < ! f Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 123 of 145 ED 002061 00172724-00123 i SD !<s J l SH W 'Dm "<A ' s ?!<| `/Ji S a u d e t* h T s -'n a m s e r ; f D *,' i d ?S` 'ids se D <<'' SU S-' sP \ sjs's", i'<> " si ara mi 1 s i ; - ' S , \ ' O t i. p ' s rsi Oedses: Dear passa. lis < m >/ v tefN S N o'vn \&W tes ' 'tetei * 'R Mi ' si st E 'i i ite Ssi' tei,' i' 's * tes tei i ',1' s' te<'teb ' h ite i ' itesi i-i. O tetes - iU \ "`'"{te' i iU* i f'teT b t v vteJ Tte tes'tei v, sii-l f-t i i h ii r . tes'sVtete^ 'i 4K' i'tt i 'i i n i ik tei^ sis' i; / te"c >..ji te>te.>bte Ttei testeste tes <*y>r'b <1 * ,, n'i<te4'>{% s' s te4, ' O ste si t' Ci' il' i vi t;S:,S ..SB.0..CSIi'vj.SV S:d '"' i s 1i' *1* , -r *' sagrasi', ^sissseVl I ss \es re" dan *t '\`< sdsap s e 'sp'aei.e:! iee i ,i ,*',! j's-ss " ta.s *- , ri er- ><' p Bg<' * ' D '> S i'i ! ' ''vi<-<:<' a-da s J , >' (i-Bc'sSCi PsC : Ad Dam/blssa Dams; Efmdeadibrd ASS; LSSt!:: Uahad ICiagsicea m/ftsbugs-Ayes:-- giss'siisini; Dam lieigig (m): 30 Dai Tygr DS ITar Si:?! Tdaiebai: E bapsarsdmssf VDams {eu. si); I cebit?-I b!1'as>g?ki; Dai; IPS? IscibasilTyyB: 3A Cause; SE QsrxisAy afTailsags Esliisate tei. s): TadiagATrierai DiafBBt!a;): laeiderii DesSipC: Sissrty aftcc gitiig Plr Esc m. Pgs isf ;itei m . assali aEpa m ihte desVteStJ'iiun s fagli pite'rte; arsd g. bitek m ib-c ieesssCsf pips pm&im Usa ibite: PteC'iiTted rbtePte' ^ere repaired bv teC.vtegP lliter aridi baltes: iM ili %$Xf ite:>|te.t. k;lktwmg mbmM. dcitevWiiam m m ' & ditete, tetetep:i;pteiiCtetemidat d'p ppprthtetepteiteteiam ibi i-tew IBI m lIsa ite'iite'testtebitei diteite tetetetete diSHSgUtpO'tei'tetete isfnsm t "Thk.^m teJifmimi h - ; -v teN/i ,< tex' < it vmbmt.i&m tha;m pmz iig -i'v im <>ks ,-r aie a r A-:;; B.B >:;i ' ,,, :./ ,< . f , ?:?AS fsaMaa! N SS Oessffs Dasae: C!easpa!e Nias teBiiss: Brfdsts CrslaArbsa, Canada Ose/Fail!a p Typ; sapper Dar Hglii (in): S4 DasriType: SO Osai Pi!! Maiadel:; ?r!W hspouadirsAssi Voisetea. a); la d d d s f Isrferssmfsm; Ds: facideas Typ; 3 Caas&rSE Qrsamffy aCadisga Rakssad Cue, m): Tiiiegs Tesami ESsiaaea Cm:): icdd ra tBeseripfks:. ri'u: btek&l sbgfi 0\ tite titetettep m w.tes*i esserteipteid. mm$ % Bay f te ttetegr: tettei by dampbteg m im wa8t&* teted iiteltitep \teteite dssds.ite'grk mtte dte<: iniy tei ibe dtetei teteteSi A srsddrtei $bpk;g ikktete m m tr^id witetete dite Stelilogy bead:-i tetetekiid te iiVtet tetete torte tebteVte ibte Itekte milansteer rkteteidotes :Ste:Tgtei teSte-plktetetei qoteteiky of teobrigte teted tei tetei bSRssagh Sba assBC svactsa sted toltei ditte- tls;te.; Tdo teiteOiditete; sraa repairsd by pltevbig te te-ddte tei)ite!iot te;ytetOorsi aaad sisaer Pie: teitelteitePte<1tediigte Iteliiliteb-ytbtei'tedy patbsag, ;x; te-iitetetebiteck trote! 1bo t e 5;, Ulte: 1essahiaed eflecd i>f dteteteiogte by c]tte'tsiteitesd ssitdte ead resluDfea f sistemai saepgg gradpisbi ymrsaitd ih rtte pspsrsg, .:teod tetebtetegteteter te.tetel immi- iteiteterooidOteri ass upsft-teteiite PIics- aoise ageissas dia placed mbs waai, Saarec; s Jai, 1T?P; 8.ieirp, IdSii: Isc'sea Ao..s id? E` ae r?. ^ 0 c a r C ,d e afsded 'Ai-ss1i ; -'vte "'S ilo" di CrbsiSsbla, Ctscda ise, T-i.s'c. T' t < E'ass P i' 10 iis: Usi Iw t D:am PIS PlaseDal:: CST ?::asssstm; vmmaptu, m); tddss:S tmmmim; ! i'it: Isscsdeat Typa: SA CSaisasSB ! Qasasatv a f Tlmga teteasae! ica. m); ! Tsilirsgy Traa! Diataaee (as): ! IpcMt Cessi-;;Uci>; ! E!lpia:g Sevcloped a? Esc abeimac? f a epetemil I sate ailBgs Sas testas. jsote&S ssassar asae iss ! sesteas- so sysiag oeaaff csa stase iaie< ssae? cessaci sess le sate idtegs asisaskisrscai ili!, IThis ecbOMtei fsb becs petessaisT ce sa sptem mpmftou& sma iisad basa added tu spspBskg s f iadmg* basi sscded sis!case iba abesstas eaaiaci, Reyasa eeaaisscd tsf sleaspiag teptetes ffil es die apsptea dass lace sied llsg iba dteastceam sedei? pipsag caii ases eSbss.s:J . s i s t e s ssaiecsa!. J teases; EUerts. ?Uce I i;K K.UCi See : i;I ;S'S' /? r ' N. c ss ? aideaslted I Vise* ;: D- *D Celantes, Ctsada I te i y sis .:.... . r... |: >.,i- les;} i \s - <( I Ci s; ,m fia Dessi-, '< tese S?V/ I i<S'l,-ysSs:SSe,'S'V ssSi5-;s, S's I isssisis'isi iiii'K Sism'i. ! CSi ccsSm' iy p ' Si -.,>s,,c te) J ip-iSi-S" ' i " ' C S S !s , , sdi SB is.t I es! si^Bs i s,<iU iteas e, s'*i Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 124 of 145 ED 002061 00172724-00124 U K ith m 'SeaeiSlidB. 3` * sa > a 1> C y ' ' r f ' 'ar >3 iv ,, _ ` >< < !a ! >>, <'* .tu s ss ! s 'S : >' 'V, >>> s-'nlU.' -; ; S! <h- b v , ' 3>mj4 !mA ' ,188a M p' S'A d *,5U'f r & pC P SS* liv a , ' I 'L l ,, ) y p r i D i i, i f e i v H s< sye, > raieage A-Amayase ' ,1 1 , ' i . v i i j F S3 l ' >i S< ' ,1 V , , i " l , ' ! ' * t t 5K y A ' 3 a ' 1 a ^ i v a i i 4 ' 54 \ rt< r> v o '< V <i- ' ^ !> J ! 'J ,i i r u r - } '} a - y > ' ' >a I " 1 A '< K ' & '> ' 3 s > ' l O k i i t a g r e e Sv ia U * ~ s ! v#r v5'< < ^v> p m < 'A ^ i i & ' , ( , i l f 5 5f ^ , ' i sVi ' v\> A ',1 j i t V * P >r i, i- h s ' ' i s <',v ,? S A -. < y r >h D , ; <5*4 Ki ti> 1 ' ' { ' 'j i < trx A v '.T v l^ v 3 s ' v Is m ; a Pvi iM r < ''J- ' \ a 'i ` v, l a * i ..s 4 \ ' < > y ^ <3 A 3 -e d a m s , , . J i ? - Al. ^ v s '. ' 5' \ v i" h s AH t K m ^ 1 s '{ ' H i A ' \ A ' -< i feOOJaei i f i ' t 3>5& i ' i " Y 3v N \ U \ jY 1 ivJ , ! ' K A 1 A 'v i v A H ni feasa: Afesis, 1979, s u a i v i v . a <h i s C i i n r n r ^ m i 1,4 i W ' I D t M s 4! Ffe; sas LsseMeas; Ne, a 104 Dasa/Nlsse Nrm IJifedeslliad Mfee Lasados; Flarsisads CiSrsrSy, 71., USA rs/Tailssg Typ: Ifesiesiess Pass HeiyliS fia); 13 Dass; Typ*.' !3S Dsa Fill Maleriss; 7 Impisaediessrsi vefesme fam se): i .Ibera IvlAi liSSmA; Dale: 1981 taefelsei Typs; 2 h Casse: FF' Qeassty a f TM ikigs Released Fas. asyTssiSiagis Tesad Dsslasma Oss): larbl::;' ISracrrMDes: l'sfefeogs siadiar la reliare Ils plsaspfesfe aie): slimes se- Isapasaad balded is dims eiessleae.ad o f day fill. Dsswealrasao raises af rise dare -ere cessssided sis a lessedadras that eassiafesed slfesses Roes a pasassass sadisgs spill. Slaps lasaibdify rrre r ;x| dsebog aisfesooraioa o f die fled iv rrr svltb sisssrisg dsrssaiife die id s ibsadsdee slresss. Sapre; Aaatsialal iesldarst Ofes,s ail Oasa/Missa Nasssa: Le lid ie M ira Lisaadeai fayals LdeaSy< DA, 1JS>4 O rril'dbi'sp Type: seal Dala fleigisl fas): 79 Da.;a; Ty'ia OS Dia Fill MllSisi: M.M bopaaiidsaem Yoierae (cu, sis): 1,230,1100 Ie rire ri labrriralbv:;; O rn o (?* > 7 . O 5 Inciden! Typfc EA Ceas: 199 Qassisy o f Tarilega: Releissed id, se); T b iisg s T r a e d O isla e s Ira ): la r .erar O escrlye:::;: M p v e a s s f i l s e s I b a d o w i s e l r a a i s s b a s r e a r e 113! m ssc e d a a M y 1 7 , 1 9 8 3 , a e d assssil is s a w a s a s ls a e o s .a s 'e d y a lia ; p e e r alai ib i la v a a t w s aaaalaa D a r l e g o r d fe e r s s a le r a J a i y a i. i 3:11. fa rd a s e s iid iie g ; s e i r a a a s d . l a a a a ; s s s a j p n p l a 4 b ib lg b aaai 3 0 7 l l aia: l l s i r l s e e d e s i i s s s '. r e r e r s a s e d e d id r & s b a r i g a d a d F lsp e , iM e a re m e e ts b y s e a r e e e a s d s b s l 8 a * ly |s s sl9 3 la ,g a l a a g a aaaaalaai l s a l d s d a S e i s y laya:' ib a s aa ia ia b fes e d a s s e s ib e a s d fse iia a ;, a:aak R e p is :; i:a c b ,a l d d rafeas a-a 03 ::ia'a,'r:a:ia:::aia la s e aaa; a aaii:aaa: aii sa fe s a d eease . sellss . T b s r e b a b e e a m ;a;aii:aaa aa'aaaaiaaaaa Snisgts 1989, Soerae: Feimay'aessia ESpt o l liaylroa. Osa. sf Darea Ssidty; LaBsila basaseirig iOassiisaity, Uaaiaaa;, ,laa 18481 MAM V V b F . Ufe I F C I D E F T T V r i M I C ID EFT C ESE; & t airiibiai Daaa 108 Dem/File Faesa: SilaaaKIeg: Mies; tissate:: flalaess OaisriDl ID, USA Os:Diiabias::S :T y p e i aiaiipai Daass Megill (m): 9 Daaaa Ty|ai DS Daars b il Flalarad: 11 lsspomsdesael Vqie:ms |sa, es); 37,1839 l a e i l f e i t balafiriisiaaa Dala; Oii-ClS-lfdS taaiaei Tyya: 2 A Clamad OT CSsasbiy aCTaillags ila&ased (sa. id): Tafefesgs Treaei Dlslaaca las): I naim i: KesaripdlaiK Tisa lasKags Imprnadmani vasa feafesi sssed e r aa-aaaaa lelgsgfeas aabaaa a a :a a a aaaaaaaa alasap baaaaalaaa: e e p a fe le e a f Ose lalifesgs le lisa iserasaiidsarfe fa lfe d , d ls g la c a g a b e ! K ) s a d i e avalar ^asad m tm p p i g libe alara., T h e la ilr a g s d a te era s s e l slg a lfisa sfey daraagesi Oa),y se se a sllsissg a f i/>imfi:f.Y a d rea m aasasaeab, aras raassrled., S a a r a d Idaisa Daps, W asar R es., Daus S a fsty baaarlaiar A il:a CsSid CS,, B e ll l.abaa- O i y , T 84109, USA. IDUS fSECi s.M I F g ' D l b 'l 1Ai*F: 24 SNi'ilFldt'CfeHOE: 8"' feiiiJriaa A-;. 121 Osias/iS'llsa blasae; TIMCaasedaad Claasi Na, Me): Lesa;aaa,a,;;: iaiaiaraa; alavaria'. TN. USA .)re/Iaili:a|)s Type: esai 3 l i a Msg|s3 ( B f ) : m DasesTypa; DS Dsse Fill Maiarsl: SIW bepaiasdasaai s;a'?irraaaDar re): 1,099,800 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 125 of 145 ED 002061 00172724-00125 dfesitei L irtn s te te s s ' s:>ee: iiM -tete . j r: 1'|V M i , e'e te ysateg <*> i temgvFe -teteteM : m irms Tewel Dssiaer.e(te: !tested Deem'tedo: tee r. 's.k, -n J' s i te : A c r tid >' ((Lid L lite Vi 'M Me'. i te P CX * S>, ,, !V a !', te* Artete rit'n-W dip tei h\ i. tete ; U .e14, A-teei ,;te <<( * sdM v te 'M .vsi ,, l s '.>rei psterte !s>-'..' >fsss*i; <l'<<lie ,\\>te>\ t * site S- f'S- H"C ite* i > ! !S! -5 J Si : - > ! ! ' M , ! < '! ' 1 !S t e itei.sted.in iVe id !!'' ten* A.a> S',- roe !n< .'1 ids- <. !i te di (- v *,.< Jj-i . ' i ' ' ( u -rift enter i y dv dt di - r'etex- i a m - * m ' m <1 ,4 ii d e e *m vi e e.L i e ,p; te*' ex* xir-ed >k' (\i<ii, * < g te te 'v, kii. 1 *A(Ss-( ii-'i- v ' vi de U1 <'vil i' ex ei a iviix. vmrrer n -e, vi ;; 'A.i" r ite cry's i >hM . 1e: ':./...,...e;.: Ltepte ..teSUS. te HsteSdr ter Environment; (x. D iiiiv M iix i 1-iie: ivi mm::i;(; L e a d vliis Lost MO, USA. Rs/'lSsiiga 'Type: Usid iiint; HeUUsI; 7 lita ! y ; Mi Osm Rll UliSii!: ST isispyarsgss'BVaisssife i}:: irv.df; iciErvixriiS; O: tmkt'Tvpik/iA Cmmi ST Qaiisilty esf'faiSip Reiesse (u. m.}: Tilmgs TVivel ffiaaeee (); lisdd BewrlpSs Ir*. i-Io r&kn$ oT ill:& d mg cy&&& mn m'm5,pv : i'Mlmmi >l.S.i5>,m%- of ktt m, FerMM$ c<:;?'iplg'4 a !i p i fiiirimns:j yy Filer mW W.SVfStiAUed, i$h&skm. ma&' eate fill km reiFJ-eti; s. lieigist SS idet umvii ;kp .sMdel iS S. "ki disiwtez mi 2 fi imtp &<m4 on il:s sesiddl;i. mf lise tikdote was Miete;;vd i iieSiiieve l {Le: eie;;Se;;;pe; pipe, ete isveslipsdlls sili o m oloo o be prely MVO by 104 sbgjy iif aeisiis?oH o d4 SO:;?gO>0 eslem. Hie pipe im k oi'OtO plegged, w iOOTiteuO Iramogc wso ds.OoiOx'iI te povboo imoho foondarko uoo.s m die dw; m iim o$ M Soiirs; Br-Wiorf 1:074 Ate 1UM.: ite lUQUESSTT fEs: 2 IH C IU EU I CAUSES IQ leeldeal Ne, 44 DeteSiiiee Nansa: Il Cofer Ne. 4 M '!' ! W di 'i Si * et Te hi e~ i ; ve y >rr--r r.>4.i S i <; - D a- i^ v US :! m te : te.jvv. i tete hep.* 1 ;v' itiv T>;L; ' >o ' die ({(ip '{ le ernedee' te.e k M'tej Sr.iv Iw C,,,r>,,' Si) '*.& r >f i ih> M ic.icc *. c, ai}; 1 .n.d's Vi-Vi i'-i.v; -aI liSuUfcS !J;3;; : i V. . a.l! ><' < `(-''KC-ISY V S" -(t iV'fO 'S.'fC'Oi,i i s* , -,vv.s -' . t i, ....1 .( ; .. iJtMvci `irai! >,,*,Anj rv<.v''Ax x'o; - >i;,' ' ;c S ' ; '.v ., .x.; ' M i ' ' i , i' 1'V. D>'(iv sSx' V i! i v i 'i c j' . i v * VSxc 1 y 'S'1 l " 'X ('id o ' s.<r.y <'' t - revi.; ss, <' ''(>,-. y. Me ; r- s "( ,'S' 1* <i<a htivun m ihi.kv- ! We m 'in? < s- Ss>>i k <>i ,c i f r. -iv'vi r* 1 .fi< `d } 3 1 , >x , - -'x l m i ' f ; SIS is U ilU NTTVP 2 & iS J U L V l XL v i ' i |> am ?U Uijm fcw:: I 4 | D snU L fsiie Hmm: IM dsiistsesi S li s L siseaam Sjylisfd iS liiid o is O iU lM ig-S iy v : ixvd D iS g H e ig h i }m } D s r T y p e ; S S"ffl L i s t e igigggedltesiit Vivvvv; v v.f;':} Ipsiitea Ite;;y;v33; Dase; hwidtnt T yp et 2 B e e ; S I Q aeSiSy a i'T a S ileg j SVvivvvvd {e'a,m}: T aSfega T te e S f iit e w e !m )s si-ddf/i; U m -.H -i; t-x; i SldMoi llfiic: p%msm b.spe ;ifid e sim i 0:ewed 1 duiog mg#m<moriSitep:ms tuddgTgO \ tpm of o fi iiieKdi'il 10 $Tew f]iOOaO o f ihi ! knpmnmiM,,Th ta m wmiesdhe\m m Ov|'iOl' \i drg.vvOvOVii c<i'fSiuo0< 0 ; !V:a sloise loMimm$ remmi oFthe: ioldrge. \ k%u?MThm:m:mt\ ;:ste E'm, 1972 ! CALI TEE; OS lOCIOKNI IH C IIIIU T C A iiSEi a(| IteiEeat O.: 90 OmMim NStete.: Hctssawa Mis Lesesas: Jsspaa CTeeTeliieg Type; gedd Dg HeSpLS|p); 24 Dase Type: S ssi Fill lste d : iiBpoaedssesis V tete |m; aA: 32SJS I iiiT s it I e ftrasiilam Ode; U!4~i#" 8 leiem Type: *S Ctete; EQ QeeeSiSyefAT'eitepe Seleesed lee, ill}' Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 126 of 145 ED 002061 00172724-00126 M .)>* "\*%>* D Ci 0 \ *V\K. iSHiskm C ^ r w X i j r I V h"i ii I >v W x ui i 5 i' 0 b ' V <<?<*' i l <M i \ t {*1' 0, M f<0 {SV E jV ppoorov i'p C o -to U ' M b t ,>< JLv o<ii ** n S* < <U*>i v*,i\ ' ' i sx.-'il, S < *}<< bi < ?X'&rrd. Siji'*'*' CA iv <, o V 5Odf) k m & m i &,; So 0 m/Msoo N'&me: . H m y s w M b L o >: j&pois C k V T C O o p typ'"'* |o M 13s;:rrs Bbg;b? (xnK 9 Chim Typ' O S Stern f i!i M&j&N&h hv^yodsTSSi V l U i d L 00: 17,00(1 Ibon40ot iufo f is ta t 30 W I 8 ta C e o tT y p ;: 313 Csuse; E Q Qs.nity M V V d ovo Rsioosod ?&); $p { 1VAOi '-' V M InddeoS D t^ H p d o o ; "fho d&l icypyriooc ocyoond ycfdop;0:oR d . o> b ClW O S g Rom fh M 733 kO'-DsM oos.--R iok &? orWgU&k; Th hopouodrM hsd h e m m m U m Ib? oho! 20 ye$fs, Th do? n.porkrioed rock M g m & Irogoodyd O dlkyp ?A<hibrd ?<;nd hods,, bot n CiVtg m zxm te, S m m m : OiMisii, y? &h I PSO R A M T V P ls DS IA O D R N T T V 3 IRCIRtW T C A l s AR hiO kkib: OM,; 17 DorW bfl Niifi::: MokOO'i Tof-Ocds M C .toc& ita; ie ffta o n C R v M T , USA CAAX8:dig:s; Typ:: goki .Dam: f k i p s U}; 73 Das?s Typ:. DS D::n FW M s o o M M W im p Q ^ k m w x i Voturo (o. it}:' *5 0 *0 0 0 I?K:hi?::S1fW ti%MC: Dos::; 1.027 ix \c ld c ^ t" T fp k 3 C ooyu Q ^ iiik ty y f TklCgs Rdessd {cu, m f T W IM p Travel li}: ta h ta t 0y$npM?: fis bTpooodmont boPOiTs. wss fVd vdd; voosp&nod soiMkriVsOod hoor ndyrkb. by o OlRi' hk.k:L Tb h: WSS :ibd t bxsiiins (im io i h yfim rsiM .mcyff liMm j'M n i' 'h i <, ' h< X ? ii, i< y y r? v <*M ^ h <b >5r 'i ,i v t\ ^ s' > i t 'x k i * .A*' Ji * ! i ^ {h< k iisr j i / v j r ^ * ^ 1 4<i i C > t i >i <i' i' ^ ' ^ '4 s ,i'<h u *i 'bt' ij ** 7 '' bj v'i ) - a r ' V ,t/u ' r^> u r; ' / "s't % -'- ,< a \K y ' i b r p ^ q " - ' ,i'\h 1 ** yK'f f 'it k<55i>p I n* m w ^ v/ M i?\iii '<'jc y y Si""/ 0>'J ' t i-ttt s i'tid u iR > 'O i K\ j : i - : iA O' A v ,v V ii' ,V y' No < 'v '* -P'tO i Os <'ms * ' t " \ - i $ ' ^ : k * ' iR .' H'i'l k 3 it-i. Es ,oNa O'is/O^V' O 0 i 4' > Ci vm? iivci <' ,.-; , A*. " Oi<< * t < >i ii i' V R C{10 O i l r !. s f Sv 0' >i \ ' OO" - - -,! tr 3 i'O ' *iS< i' ' ' wM o i - '-' > i s' } S ;{< t U ri* liiehW M bi<5<.: S3 ?W.sr;: Q iz y Eigie Rii SR'kiyo CA.; US.A rWTslh.i'igs: Typ: gbi Dsm; Hfeigbi. (:}'. Di3:i:yi Typ: Q$ Dy? Inll bTsienph: E M ipoiiiifl 300um (c. y;p 1y!0O I fp rm ifpp ; DM:; 1722 lo!iieplTyp::: 3 CPUs; Qmyppy a T iiiu ^ R.Rsd (ey, pi'K T p iM p T?0v| PRl:$pp pp}.;: IssdbPPl :D fip 0 Tiw Wt psilsMii :i .up5pr:s?yivpipp cly '<<. s i y >n bj l s '' %\%$ cc&MpcM y y y jc'dld yck fhpyysSyn. P m y k ^ w$% f&s$ fer foMolhii-Wil 0.f 0. i:b::i SOpp:! o lictioo 00d pooiph um. sysOori :? rousoi: ooh:Otod ih m s i:0 iho iop 50Of m m > UtrWrPsyoo pi03hM:m$ roto;Med ;0 igjte r iOooos oyooMv yp?ioM rM km s 1dom o o d p Md , m i yopigyg-dord p roolpdsEfi p iv m d h&h m icpogo ro 0oy>o, T Orno. orooSlos: ab:r 0 0 m | : bopasy ditm. ih fpyf^*srppge 00:3 W1i t a tioo foto Mie dy'st'iyiim ofM reteWoI. 400 |.pso. UiKSii ORO cvoabR y yriS&eteteO M wiihfO: iho ioioroyf slryioogo yssom. :r e a d :i 20 ppm. O sor! 100 p p a ssr T lR S;eeftege m m & M m m kcd; yookk wss: noi 0:iiSO0red, r:e iV v titi m h; lo:p?yU;rylrooof hod Pont000 ;he y>Pt':p. WOPi f boloocr. T o 'ofoyyot psyryipipwp o f syrlyo O iorfses: dWVim osi drsmogi o f OowyisPooooohoh M -tm tio; m k rg im v z o f Rio ft: poopWMk oyyiyio: ooovyocooo o f y. tryoioooi pistis for Som ropapoi onci ioeosso'o so sodo- iroposoMri'iSiO Miko^s \or: pfppo^g-d, Sooipoo; BiAohfstsoOi oiol, 1085; C m u x k n Colsi Lrd.y V&roovr k m m boo M3 DssoTMm Nor;. L V kkobilod M im Lm m m : CIoTrijIrip: Tvoir: gobi Dsm f k lg h lf io f Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 127 of 145 ED 002061 00172724-00127 Dears Tv'ps; DS Dm RS RlsaSesisd: F Isepoesadsoes?! Vsdas (css, a?a); D <<'( IisfcMiS?i Des: laacsdosaS 1y y?:: 3 LWssss;;. Quality <>fTp. Eloasaosl (<u, rn): T 1' eintf- loeliPPt Desrplleai: An hAbA eeoed oasrshMi mv.: was cci.asTliC:W4 of feomjvv ?;XSVdd: fers wkhi:n iM&di Th hupU?cifytii:i.!: W:;:m nm 1im di iim tfip}ts cutoff m > $iitpi:gi-; ; iti b g'Uij.r3ri^2$i; es ske sleass esse sasIsseSed, eepsga ?T$k?^syio? X&&Ci? i.ttcorm in iho stalls? bdiiiliit ^i-i saidesdssaiaa $ynm\ soitaIsa C iAp-0^idSiiJS.. :!i f'ej'iC;i dre,? gkm$ sh m toc # lh$ 4^t?5 m$ 0>i.icmYC pimnactM? nm$cmilcm, FTime. >,f ih itit. itsukd Ixt $h sO.pilg.0 % tc btmxik fh. mmh mn fa i,g.h iCbitQimcic Cj-tCCi of tasdo a?d wlJsl 1S ht\-mimcicr.iml m SU;5'0>di>:d mcMUiZt s;Dmriicm of bp trmh s i sgeiesas iaasessisiafsasissg pi.3mpbsstsik w elk dsswasstreeas From: lise saUeed a.e< d e , D e s e y : AaaaosalaisaS DAM TVEEsW ff RCIDEETTTFE; 1 IRCIDCRT CAUSE; SI staatesi Ras ISS Dassas/Rfee Natas;; Usiasiesklicd RISsatsscsdsas; pessa PSver, PL,, OSA OseSTeaisoiss Type: i x x p x s Dssso Heghl i syy S Pass Typ: W II Dosa? R L M e ta ie l: E ii'iSiPiiisasSWaassS VataSSi {sas :T:) Isaeldt la fo ra o li Des: 03-3-1952 IsasedooSTypa: IA Cas: SI QuassdS o f Tslsgs fetaaessd Cos, Os): aasllsagss Tseayd Disdsaaese (aaa,): Isssldsaaat sssaerI p : TN slasa plies! Sy dsdfog a?fSise w m oe iim ssed gitaalldy also sise uf*eism olssp, CmasRfssssie:g osssos o.'isy xradded ) xommm of dm seaass? ssfcove; sia leeel saf tlte dnpoooi&d pisaepfeOs dasy elfe;$ sassd Lsfiii sgalxi d>s saaasSresasa? Lasse of iia: sierra, (23 sciiY'S odaioig ssd liieetasag aas sadjecs?0SIcacdlissos dciwrxtmm from Rae dssm; si (5) ssssslfpssss ssaeppirig asd gysshfeaog. asS Sise aissisasiSassssdeiioas sssaisas, Sour; AoasosteSsd i<ta?Sa:'? fiat.: ISS Dass?M I eas N aso: D sasderslaiassd Miss Laaseas?: AleLss Rhos, F f , USA, s lta ,T :y i lr y r Typs?: gPaaSplsaiS Dass Betgfai. (ssa}: B Psos TVpo: W R Diiiss FEI Mosersssi: II tapossissIsasesaSAtatasae {A, mj S?sd?k >' is?W isaTc:-: Psea: PT0I4952 IsasdeosTypes; IA Casa SI QasSfSiSi OfTislIssp Eepaaesad (cas, SB): T ta ie g s eaivad Disses? (m ); (ditas: Starry,?!?: : Ttls; riais eaespi>Siiid y iy?:ysysvy:yr ?yyys: y:: Oy slsswssssrsessas soe (lassa 'aaseessasdcsi ??? ssgsakadS aise ditaissareaasas: disi y- des. FaiiOSi reed <>D r s e if? i"> ` ta e , " d c ,e ?v ea \<\! 3 r i e ? , , ', <s f * ,y dda P'? ,,p ' / I ,i ,,t y a,ed S><Sss>a,e." ta ? ' ! w A f ? .a ?? rp id -y rs s d - " iii if iFi 'y ??( ` a U ' :;'' a :;//: a 'Sa' !SSiX't' ( i i i ,! t V S? S S SS,' , " >a<` - i ta -, 'ta W e",s s ' y y Saie' r f y sy s'* s d d 'p s, s .' ' Oy ?r - .iasw a '3 ''if :<v / '{ r $>i do ",? !<U ^t:r,*o j r b 'id e? f T a ' p <s' '0 y A ,S : a fa?'- s / A 0->UO IseklessS: Ras,? (a fMmff rdooo:; ViXiS IVlisviX iVIsAo limmon: U'dm. Cta.'T'addogs Typ.e; eopper O'l: ie i|R (e ? I; Dam 1Rpes W R DaS'ia Fail Stasssiosal: T tapsaoisaslsssesat VcsDssa Ras, ria); Isag)sfes Isfsrssassias Oase,:: sssdass Typs?,: PA Cssasse: SI Cpassssiay? ssf' Tsss&gas pdsssssad (so, ssal: TeRkagsTravel PaMsssse(a?a):: isssstsss IteaenpSls; Tsallisgs seasfg esjsasasl by dikes i p rim a rily assalasa:gaa Sill ppseesl sessU as siresaiasse ::?:d ktveStes) ssdil? o :Pa)Idcer, Tlae fall sacesvsd i?o: o r sus eesspseiiiwi, y?;?S aks stepss Dsagasd skaas S3 Ssa,3A dsgrsass aal 0 sioas? Ibas efaglo s f rpsoae f dse saasSsSI, (Visalisple slaslsfass i f f alia: isfese seesss'ed, akposskag y y y i ? i isailsps y:t:> y::f aseasfLy A 0 sa River, Sssareo: iSasa???::??, : 97y D A M TVEEa W E f R O D E N T T E E s IA INifDElaT CADBEs SE lo ild e s if Po,s S12 DaasiiisUsiS kssss S o u t e s Csv Ivlsra Poeslads TM, USA OwTssiJisigP ygs?: lay Psaos Hig'Ps Im ): 5 Dssp. T;spe; W fl. Pssasa fa ll SSoSesosl: F O:possnd:iei V o !u sw (eu, sas): lOieSsI! Istoessasskasi Dais}; lip-SIT l PSS) lisaeideoS Types I A Csiase: SE Qsaesslsly ssfTwisasiS Eeltaead (esa. ssa); 3DS Tolliegs Tssaeasl Dasdsfts-e (ara): lasesslesas D e fe r IpSlsais: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 128 of 145 ED 002061 00172724-00128 * io $ \ ' i ' ' t ' ' i * V 'l s V t< ' ' t ! i f < VC '>M is >'* Vv J - i* t ^ e r e - 'S v a 'v r ! 5 i * > i'> ' f . - 1 * 3 * t ' ' J > i > i t A S f 4 M v k ^ fS t > \ r t **\ t ? 1a Nt / Ut 1 i ^ m V 'j f t a il l i i i i ili A i<< ' i \*r< v ' 1 " J i i | V l\ * * ;* s! a v s , < r p r ~ ; e S ati ' \h ' \ i rr : < W i M i > t< 'V v 1 '< A r ' l , s t x i< v N *i t < > b\ fih ' < a * s ' \ M i ! - r. D a - s " i k '1 ` i U J t * tgetResst Nm; 91 >, i \ , - M , ! i , S ! Min Lesmtitm; WaRawraaR, NY, USA '!*'S .'O ' 5 ! I Ram ties sirs sms: a sJasss tvae: Wtt .Dam ell! Materia!; E msprsemmrerst Vmmrseiea. rss): 128>CM!i> IsseMessl: tssfsswsmlims; Data:.1985 iraetttat Tgy: !A CessserlE QssmststyssfTgilirrgs Seseaaes! (ea, m): 8 TaliKgs 3:4V:: Dsataege (rsa): l,SC!8 I peitiamr tleaemptwss; With rse emtieeasibg essyervistme dmirtg essssssssrsiksrm t ilt t i n t SB: Wits t i i t t t t t p rmemsspaeses! lies Map BUM pasmfaim dry steearty), i} ' she Is ti'OiTOd ilig 1 iiVi 1&P&I oe w im g m. km ot. ifgb'?! iy isktmj mg of Be alopu sod bf&izh of eitss skm. Sssf&; Nev-iis Daps, r i Cm m vvm ,0l i Hm, Rea, Oft ,: ik >1rflt mwAvktu Clod i Vaticiitiv>:;r Hai U 0 DssrsPBIste Ntrsss; U vtMv .Misse Boi&tism: ite g RiV0k f t , US W 1k i 5'S^i -T OOOSabate Dess Re U lt im i 6 DrreeTy?'%y: WK- Das F ii M M iXI&t Mo Bmpseartsisrieet V dttS (1o, m): IbetelePi ieforsearles Dfis: MTdRi focd)i04 If'/po: A Carrer SE Qirnmy olToO: g- Ri-!-. 'S, : TodOigs.TiO'vel 1Uiatanee Cm); Of10SOSDfSSrlplIOO;: Tlio dtoo was mmmav probably /ooio sI0:l1 fl 0f. ilk ImooooOoko t v O o k h ifO jbos^htc clsv olfllfS ,;fd 1 d irfff oooO iC l >vOh tha opoii lc/7 Fotorf oc<0.00'<o!. |oc r;;-.0 s.hf : dOO;05lOOi.Ol t if f of tha fi Oo/oihlo ootob000f iofioo f folofaJi prior o1 Ifduik. Ti p/oducfd oidi! ffilldo 15,000 p Io. o. offfk loioro; iesl sei e: Apeesfetel ISteStletSt Ns..:; ; lib Dgm/Mipe N sw ; UstesSites! aCee { . t i i T i t : i t - .:.. Elver, F I, USA Ore/TasSsps Type: pHsepSaSe Btssss Height (srs): 3Q Data: T y p t WR D im PSI NWsssgi: MW tssspa<itaefi! Voiries Csat aa l.gelslest talmmisilsiS;: Date: Ct: : ara; ; i l t t i t l : . T i l l : SA Pit: t u SS Qtssatity of ia & g s Refeaeadleis, sa); TaiSiege Testes:! i i i i i i t t {st); fsseitieat BteersgRista; TSa dass Bes! bmas erntetsied ; a Be Bi: ;.sni tbaS: raaag raigilog: m i x w t& itf yttim P iy eeessistfpg f rspsia *tto eleyg, At the siete e f iitsisrea,, p p t t t t i i t sirese aad :essr tvsster serre1 stapmmsistsl tsr sr deptts o.f ZS im . asrd fiblssm Sa feaSeves! e Rave Besse, sises so geepggs: assdpipseg, perlsapg saasarraaaae by t i i t t t t t t i t t t i y tt: m e t tsr Ws Baiters, Tire released smes pesslrreet ' l e t t t t t i i t l t i : : t i t e i t P t i P i t i i as Bigle as S80 | i r r s sir. A k r - `r. ! Res s a V Mara 1 ASWAWA%W i SABI BVbS. : WR INCIDENT TPE; IA 1: INOSBINT CAUSE;: PN | ioesslerst Nm: `M B ! O w VfstagNames Bsss Fraltes 1 Mlos to^^koo: 45 to i looot s^Ii-o, Ssio 1 Or"! sslsags Type; pgretle Abe-B. ! Dare Terglri Cm!; .27 ! Saar vare; WR Oerrs, Bill rMatssn:01 n ! 1mp# srsatesesst Vsslaere: {aa, mi; ! .,000.MIO ! IsrsWerst laforssssts: ! im : 01,00 OO04-04-I00 ; Typt:. iA agse; l i t Qpamirv afTirslmgs Crmerral {est, sab iM P iP T ii Taillge Testve Dielseee (m): 40,00s! P-abam ?>-<., AtS-eOtars birds o f wagte: ms:kSl! wgss degigesesl to tssree: tee ypsifgasft gtepmg eertts core aseeneeled to s sksyy erseets eabrsff pggssejt stsmtigb Me atieetsi 1 gsewetss irsto smdestytssg mari, A BOSrrr lessg reelles Aid fetw&rsk .gas! perses! Bise a gate, lise body ssTslse 'dass rmsgiebsg remet. SMsgespeot site iseregsigalif iarfegsed Tie iailtire streamed stlssag a sitertr pig.ee gbeer aysa li t tire bstse ssf ;its; dsms, Water leakage tlsrastgif a adjasmm seedpp srsag have begss a eeetslbaiesry BteSssr, y i t i t t : T i t t i t N t i t : Release i t : ft) 2|sb April ! TT ea aster tit Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 129 of 145 ED 002061 00172724-00129 Indifesi: New i W DOj;Mtes Atese; N 3 t: Citstisi Misa Locatkm: Oipsdssy, Nagrcsis teditene:!, Iteiiippissas, OsatTadsngs Type; ceppar Barn i-dgssi fett): Dine Type: W:R Basa Pii! M ntstef iy!W IssspeassilnssnsS: Vaiasse Caes, sta): 1? M i Isselda! I ssterineOnn; Pese: ifj.PChea Htelfel Indefesse Type; ! Casse; FH C ,S f e S , f *> , * > < ' > ' ,, . < - . * i t s ' s> Tisslisigs Tmvei Disteni: {ta}: tneidete B m e tfi'm m Fasiste a i sesees: e f clan: dna la seppssge sii ftessdaciess ets disyay ssssi; sarlnce materials ani rssnsfeed peer S eestentse, letetentte nesdsePesf; a i sastnes daesk tese a i essSsfed tesse win::: a i very e M z p m i c k x , Snaree: incidete Ote: 173 DassdAiisss: Nsssssss;: Usted Nsicidss Nife; Lnaaslaa: Lfesitdsasete HNS, USA OrtyTsdlissg Typss: cessisite Dam llesgife fea): i I Dite: Type WS. Uss.as f ili tesseste!: B tssspeaadcaea! Volnnse: feti. ai}: 370,000 Iacdete la te n : siles:: Dat: Offe Afe RIO Inddeni ifype: IA Cense: FA QisnatiSy it i Tsslllssgs ffeteaseci fe, :}: "ISO TisdfegsTisiva! DisSsnsse in:): Incidete: Deserlpilnss; DDeeasOsi! iistspdfesdn: sesfetesst, sgpspssesi Py ss islgb tspetefeg ptsftd iene! and nercew nsiifegs Issassi, essaeed esnfestssnseni asselclag: and .fedisca isss pspieg. testt-Odiose feyestigadeas sdsosyed Cissst sane fe;;ss:}::::ass sa;;:; testi' sabjed la ia esceess e f 10% caOapsk: egea itetststefess, The, sitesea e f an i:degssase end feesds sassi direte sasdaet n i veste' id i!: das easfasstfccsete 01! sdlawad gspissig: sa scacci siass;si; a:a;;ks le da sili sisas deneleped sa asa; ta lasfeasiaa sealeasete Rneglsiy PO .astillen piteas e f tafease;!: aissassS iiacvaian: i S;;a Afe Fasisee, dsesayb Gnlfep, NMS ansi: sata A rias Idr a fesaasa e f $!}-?(! saiite lattate eeeiplasety leOltetdsg lass; da; an';:n;;"fe:;an dina saa Secseee: NeSasn end Essa, IN; Snodar, ifete .*1 incidete N w 04 5*.'-A-N,S:va:^)/t :Yi$?k- ^ ,,, . IP" ^vtrv g .Ayvf'j.:-;-,: Mine Leenisaa; Ctensteefe Nte, USA Oretescih n p Typa: satenes Date IlesgilC 9 Oats: Type: WR Oasrs Od Msssseteh E insans;Alies Ytenla fea, sal: lacidea! la te n t sdlda: Dete; a-fe: ..; as tesdesst Type: !A Caaes: Ffe QssssSy eiTsliap ReteaesO (ce, m!: T il lsags Ttevel is feeeaCn}; l:aei!esjil!eaig!iefs;: D iffeaeiM saniastseas o Itsssedtees: sells aeased mnkimkmgm s:a:asdag sad p|aa,| fefeisa. A sssaias pnasflty f efOstsesl casa assassa. Sessrea; Naw Plssa!:a Sdsfe Eeglegiere O lilce Da M TVrfe; Vfe INQO ENT W P E; 1A INCIBENT CAUSE; OT inside! Nao I? PaePMam ai;as;a; Is;:as:;l plaa Loeetsea; Assets: as:fe, NC, USA OsaFfesIsap i f fea ss;a:s A aasssss Dase, jdgisi (ta): $ DensType; WR Kesw f d` SAsa: ! Isapossdsaetst VcslssmeIs; ss); II,OSO 1tsefefeei Itcfcrsrsecas; Bisfee: SS-iHUiOSS OsciOani Type: !;A Csnsse: OT Cleatststy o f Teslsnps Released lets, es): 11,0QO Tissgp TAasssi DsOsace |a:s): MIO Iscaid*! Beserlpilea: A tedie!! d f i Ss: as-ssas ta i l isasns; classes sin evepappiag felOsec: Idet teeped eleg felisngs sed 3 as;!!!;::; saias;;;:;. ai' asiaa;: la;;:; ss; isdiasasa lassaas; Tita tesA ss rapecied te ite e lead ae sotte et spsliway nT enfeiteep type, artel d:s bteaeh iaectatad ai Ode teteison.: Tlte acaiteeis teaeste eseseti sesne dns:ge ss fee send nad yACvsd pisas: issirssdisilsiy dowesretats best we.ts eeafesneed Its tba pleafs ftspfe:wafer pead ieseted des'estesnt Case i!:a pleat, TOss: siete asa: a ate plssate beak se senda. f fea; a Natth Cstafes Bnpi e f EtestP, HteMIs setid Ntd, Kes, Latid QtssSiiiy Setfeen Osedeat Na,: 74 aaasasvaaa sfesasa: feissdistsst tesse Sa aa Alssdisca Ctstsste/, M, USA Ortelitdfeigs T yte: tot Ofea flas'ife icnk i ! Dea: Type: AE feit: F ili fesassaii E iaspaatsdiaseat Vnintae fen, j): Ias:dens !afartosttiad: Date 02-1A40T" festeste. Type; ,A Cfeese; OT Qesafeify cs!'Teiitsgi Rtdaesd. (ce, ss:;): Teidegs Tfstyal iplaesse {tej: !aeldest! Ifeeeelpnlcta; Te d:nt: eeapopped desteg an tsstsinsa cteaefs tentai! essa St: a::a;.|;.as:.:;;;;:: spillway aaassaaias Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 130 of 145 ED 002061 00172724-00130 fkw skdkg i iro develop; sUft&sigfc $tirg$ wer# &ps. by iis b$ipi5iidd wnsr Hawing tbtifh sbs te s a li Th&; ziI %% &txoe ;ii;bi&-qu?b}: <kp<t$d throughout h city of fpH hickW m i. b fb w ib te$&-o??&< Rosr, iDim ood ta^rvoi S&fm brogmm. fii&klsol Ho.': 9$ te m M im Nmim H iVloo-v tmrmlmrx i.mlkb. NioqdcTi Orfmfm.p T y p t: cMroq clay Dos: Height (as): 3 Dam.Type: WR Dosa. FUI Masasml; T Inspaisodsssaai Va l yase (eu- ns): Iscktellsfrm iR w s; Dais; 1970 Ionisions Typn: IA CotAt: T QsssSnsAy os Tallings EcioaSssd (an, ns); IsSogs Travel Distants: (ns); i ssdsteM Peser!gitesi Claostoppsag istoa sicoaSiTsa! sn is iss Islosskssp; efe slaeont sirocnsgs, S tarrs Riploy, ISiri IM ,M W K :W 8 SA: S A N : CvTC |A INCIDENT CAIiSEs i f Inotsl; Na.: 179 DanrkiViirr N;;;S;t: V;;y;;;s:;; Ven::;;;:;:;::;; y las Location: Lcnstso CtsanSg, VA, USE nfTaiiags Typa; sosmgcotRsS Dans Moiglil Cm): 9 Dass Type: WR P Fit! Msinal: E Issspoontima-nS: VniySaa (sa.- ?a|: InoiOM Usiariasut:; Drir:: :SSS lasiisai Typs IA y.T ET QisaaEiiy ssfTailings EskaSo (an, sa): f allings Travel Disisssco Un): Issssrrs: lisss:rssr:ars . p:po im bwiy rhioogo loi: m&yorhMo snsbankmssS ssriSagsod ansi cassas) sic Usai as fid) A downssw a liaspi ixidij-ir-id ihe sailings soloasesl, TM s 1V1S by gkggsag Una Iti sgliMop<3R4 ittiM tiig a n m sgi!Isassy. Eonrat: Osili. M'kSmfMlvirsk und Isgorgg, Hv.. Mi?}ed Luiid IssaMssas No.s |2'7 DaaVIvllnsi Nosnc: 1jddid kkd VIina Uneiim : m /si!saga Typos; &m Kiqgit Nss}: Osas Typa: WK Das RO Materiel: R Imgpssomoat Velame y:s s}:: Incisi!: hiRrnsiiSSii: Datas Incidesti Types IA Caisse; S' Qaasstlsg <3f Tallings Releases! (an- ta): SUSa-y. 1 sv, N Dsm.a ssa): lassassi Pesmapssom U ta , j tns'.vsl 0 - F sagene:* sscilrsn ef Assit-eciospaesesl slay Tsas sai sssslsssis- srrsrsO SI). Tins s)sssss. ss;;:s. saliseli ;s.ss:Ssss:sssS. :ss amdonRmnss,: stspions! as niInst dtsikososial seJcmsnS. :SsS;Ss:::s s S':;s :; ss;i;ss's s::s;;sss;ss.i ssspssily, Osarta: CDsoatiSsxtoassst Efebes, I d i PAM TT'EEt WE. INCIDENT TYPE; IA INCIPENT C D Et A lii Imonionl Non 73 TssssssT:;;;;; Nssisss;; Usssy Mins tm m is n : Lower Silesia, OolsatO Gss/TUysssy:;; Type; siipgot Dam Bssgid (tT 25 Darn Type: WE Data Rill islaiotiaf; E laspaundimsst! Velame Am, m); 11,006,000 Isso!sirs: I form ates; Date: SB-I TUOST |;::;sls:;S iysss ; A Cana:.: MS: R ya'tiiv `V'TyTmsw ErVaosil (on, so): 4,El)C),l!(>l) ; rrsss T, ,-; s s. ;; ;;;;,): si;:;;:;; i T,sTT| Pmnion, Poser-to Ti;.->S,, a u <'>ii st - a.t >i i > s.n -ad,'! I n i ( i . (T, j - '. i g i ,*,! .-I, n t '.n r ia . s'. mil, ' a ,,1 m tsp .J ' >j\ smn ,> - a na t soo >.,.'0. t ; ,, d s iis i y ' .1' s . .1 n/" : I'vt .s '-. r. ,ss' , ''i, i ' 5 j V 'a .a s a -'..oa g vtu g p n a J a .n Ov ills rt'i, '>} S'i., fiVVii Ev*' ni h \ - :^ n > Jx Avin i i i' N - i-n, i< r*<y >rJ 'ra in n+ iTC U 'n . a { ' ^V J U li - c li. i v,' n j Is^ mb ^C w * il V -vi v*i',4^'nj^ o b lili w ti a i: .Ramno ;rU>d,,` ->;n iib -r-, n il rn ihc i i r ^ d m > ^ ,i i,rO ''Otl vvN Xi dnV< * n ' dVv db '>n a* " nN' - ^ ;tnn ' m ib >?.Oinin >.U Ula n.'i < i v- ''M U ht , N pax j I r a s , j, s g i % p -<jj. nml, -i consoni i n WolaOi, at ai, 111'-a ICI g n i n i Cstraan ilsaa D A M T W E sW l INCIDENT 'TYPE; IA INCIDENT C A ilS i: EX it ; clssr Np,;> JUS DawMlna Nanas:: Tailings slam Nst l 0") si ' -, si's a D 'i a) gold sssinss, Ostvisnss Gto i On g, $,! a -n n,i s i>igl ; >a; i>, '>! ' ; <- ' l , R >-n I- ii at, s, \ a npcnnA'isyn' Vr n sc 1 a *siM* ; m SiKs-.lnsO Fij-.y rass !.K Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 131 of 145 ED 002061 00172724-00131 J<sU V>. R! sI ; l fu J- * s-sc c< i 1 is ls v js iv j f u - O e 'r "s I ` 111 Sg>'<SO,<H ! 00 ' 1! ; I s tA rs s s B o * s ss<r * ,r. "*11 ' !?.*>! 1 O , T < IV| , sii s'O'i t>- , ' i , o t s ,,o t I v s ,s < 4 s A *' H > i\ i J r c o i ' i / m J ..,,1 g oya.,- o-Iy lu sss.s " in. lakoS ijiio.i i \ l ' i 5 ;,s S * < ii ^ ' : k i*' - o t >>o i f " * ', i i U'-t' f sJ ii ' A \k "> s ;'-f3<i,, i i i >v' Sfit is'S s<s, , ' i K K 1 -}>' vi' ij- U ` H iw o t '3 s y t ? ' >?{ i <' `-ih ; r \ A\ V >'' 1 "m U t cv , * <L V V *<j ^ iv 2^ fW ' C?Ov O N .T-at )<}>, ' i< J 'i i ' if > \ * <<i < "U Av*i i <>\ \ i as '<V, ; v h , a ' ' ' af e4ji) {' \%Ji' U >i \ PAM repli W INCINT T D D I:: l i 'h>vi< f t p s " <^ k i - r ,^ ji IKOBEW Ck i l l W l SI * 'sSj i ''? <r < >> ^vPi V s<. v'aiv' ' i' ''Svia j < \- 'M \ i *l i\ C1Mi'- Ti \ - ' ai l'Ph- ` S ' S SiSiBiS, i 0 i M i lir'ik $4 ? 5K' ^ si'i' .Si-, _v< Or'es's'S A,,<\'fss fi'Os t ,,tsr't''sS '-A '.o< i Y.iti Nil; 7 M i DssssPt f m Hama: m :sr Bas/Toiliog ?s:odt ic i Allas 1 so, :Dsi Nes,: PEili| i O asi)n l w $ $ i yam m m h -- r, : ?\< m * \ n w , Ut Usai HssifeH): 17 Dass TypiS WS Ssss FISI i!: E IstigatigliStssSSS:VigilaStia(C. ; |: IssssMasti tffiforSrssffiijg::: U f i U i e i :Y s s . : 5 ! i i i i i S i i i sii m i C il S f f y if f '4 a- i ! *s; i s i ii Y-,,ic. i USA OsFslip Type; gtosggsss* u a I f c s g l R si s s s ) : U S U i > *\ i) <, i , Vi " i B Pi*: iS stliWffi- Iffiffi taassifost Tyyy !B Ceasos:; SS Qaassllsy ssfTsdlsgp Salassasi |Ctt. W): TOffiOO Tssilssgs Isaassl OsIssk issi; sassi ss oc:ss 1ssssSsai BssarlfRl; ;::::;o':i::v:o ssgssiBdsiiSg WtB rossi SiiSig pU f f ii mpamdmmi V o to n e (eu. ss|: i 7,isYOYYK: ir e ssoa i OsISssagatbr s k m g e e s in e d m a Siisiss) ( i n Iskfeat Isfe rm s : Das: S2-0.T07'S fodclsoryg:; SA C s : 0 QSifSSSj 5 V; : ; O- f i l i ! ,,Y ,! i 'Si, (\li 1A f f i g g o T e w e l U E A s s c ( s s ) : 1 2 0 , 0 0 0 i s i t i i i arssdplffias Bresdi -ai i dsm alb w d l* phmphmsn. *my f;:ii.rUv.i m m r tlin IliVvti :>v$m th:y rnam '4nk%1 in s for I2 test, A l t o # si ima am nnn "iaiky X0 hssr:;.sss:.. s vasi 1h h kill OSCIUmi. w!ben l* sti;is:s roglsd ih& g ilb > 'v. f e n m mf$ossei, I l i-jf >5" v iv a '? * * : i * T 'i a tg 1 O m E sssss g; v m s k s * s m d a m b s .m v e o a fo is a s A i k ilim i lit a lm i g 1s S p s o t S i , M d 1 4 i I m v v y g p i p i s e n t i t e i s s A b s o a s o f k i o g W M & c k i t a t k I m p s ; o a l a s s SM iTO n a rs t a ESiSISgosyois R s g a b ls c a i d * Siiti :, :. i S>A4i 3 Vl-fS: WR INC SSENb SVFK: 2A S\aS7EATCAU5E: SS li.il tailim m i. lO'Sgfs: & ikrn tv.tts' d m s n ^ m km*bznn m m . s o l mah m $igns a f klseiiS 1$ !mi baiI H l i : tei:him o-ci;raiic. feerra: Lssis, IAdi ; liswswfisffisssiol Sclreas; oasi Teetoofepg I74 ISAM T W is WH iN C l iN T TVFE- B m c m w w B c m m i crr i -iri:is:sH p#,s 122 Ds:issvU im Hsuiiei Tasss: S Pose) M:IssaLoaoisaa: Sassatot Cttnly, NC, US QlaOias1sags Tyas; gdsssiprnl* sta Haslsl: {jal; D isasTyps: WR Passa ik Mslfff.-gij; ] IssgpAssat Ycg.:.:::,: :cm mk i xooo 1ssisai l&rjaiaas issIAesS Osai PAI sisffiffiloa Messie: RoMsssfe Mss Lecaffie: Rsj*0'sissy O r s / I ssI! I f t g s T y y s : : Dssn Hrlgbl prs}: 7,5 Dme Typa; WS, Dsm SsUOates: losgstoailiaerst Yak:ss,:: issi, i): diitlffiCICI tsffisstegt IffiAratsasfo; Bie: ks- i 7- SVYA :s,: V yyi: SS Cs: Qastsffily ffi'Tsffifogss SsAasasxl ses. ss): TSsg Tssssi Ostasse, Iss; Os:si; 04-1- i SS4 1oldassi T)p? .ts Clause-S i Q>.sgisisty of Tssilsap Rsi (ei mi iRlgsTs'ssi'S Psiaasi fm); 1osi: m t CRissrlgtaa A 200- Im g i hacmc iO V'CCPtn Pn le 4$wattiam. vbpv n f in ta al.iiTma ditm s l*pemt n iramkkm wham |]:-m Sii>*?; llasssB tm m k* \ s pn il ht'm m.Omet* mm!;. m tmviciit hmivi: tm w- amitiasfasiist sl|: heh gmkvti miidi etSSSSl fhe pimclie Sstg'fe so Ago ssosi slego lossEiliA1 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 132 of 145 ED 002061 00172724-00132 adipe w w repaired by tespdmg fRse! drainage iOosOsiooo S:rae: NoA C are! Dopi, af ffpster. Fleadls aid Nal, Rsa,, bandi QaalfpfSasiisfNTiasagalf' las,, IfalesgR k s N,:. 323 Dprsrs/Mtee Fl Teaasgsslf No: 3 Plaid Mas basalten::: Beaufort Cosmsy, NC, S Ore/Taslssigs Typ ifhoapdale DiirPiTleiglsr Cdsi; Dafyps: WR ttes lo li Material: E Iropesantmard Vpdssse (su, as); 24,200,000 la eldsd Iaterpiador Dais; lite Ite li teaida) Type;2 Caaes; SI QoasslRy oITRliteE* Rdleaesd.(est. m f Tisilings Trassi Diaearsae Cm); Irais)sal Dasarlpi! Saveial slides seearred Sals'! IESi Rsswgis IR oossos seversd idoasiirsd i|i l appello o Osa ilOwisaiasTass'i elope a i Ora phpppptepisp aSass podd dik lisa loasafedty ivas rassis,) by speepagg related Is Slav layara deposited 1 iter dteRppped dike fill. The slope laste am repair) by tesssiptetlor: o f filias-) dreiste, Rr-oi ; a Msprtft Csendiass Dept of ijivlnsn, flsalplp aste Nut, f e ,, Land QnadMfoteeifors laesdsp) Nu,; I fi) literteMsliS Hostss SsmaOriEi-W DIE NIIpsa L.:p;saaste; RJbailil, Dssssaibi Omfislsdsgs Type; p;sRsemis Dtm flalgd) (mR 30 \ w e , msed' *.t p-;, tew isiagasimdiTseBS Vtempe Con. m); iNssIrteni lfofdsate:; iDate; 1070 1ais)aai Type; 2A Cams El Qassairiy o f Tasbssga Relasisad Ieri iso): Tiidtegs Travel Dsslspsee Ciri): teaMasti Basfip)te)ii Slope: Risiiteli:!iy wasssos dab eorpsirpsisbs Ida dims, Rasoedlal maasarss forfoded slope RsIteobsg: end teeoppondfori o f borirri tesorna) asad apsesso ssadaaee pore pressare dissipais.ps. Soiteat; Moigaissaris. a af Idfeis AMTE'CE - o IV SAS-Vf T Y R It IA INCIDENTs v i i : ON M k 'fM 116 M !'hAi- HalitWi- Fiaads Sietffc txilif;ristiss Mbe i m m % Bridaci. Haw B swcik: Ori?/';ir&i '*iVpi::: Cppp D&m He|gh)fm): .31) i)m Tr , p; Wa Fili Nediif : Rissi;,yglSoH: >ft: ateo Ire Imprsapdptenr Vpleasa (sa, m): is y < iiiti Iridrmadi Dale: Sosos .IR7M lapidasi `Typa; 2A Caps FN i * t <. ! te i. > f i cm xm vM tj Tailirsgs Trass) Diesar Crss): I hosiS) Bsse:rl;ps:fom: LaoRiiga o f water eoessalibog oop|s' rinal ateo, fspps tesili or; losooppio; badrstefc, -ids sto linar or ||sPdi:!i|. Essors; DoE, Canada teckiarsi N,s IR Dans/Mtee Nspsya: MydkRa: Creek Miao Losedera USER rpflail) o p Type,: Dam Nslgdifsn}; IT Dsrrs Typa: WR, Dam FRI iMsstel; S bopaoridaseoi V olas feri, iti): i noterru !ePromise, -o: Dosa; IRSE InadansType; 2A Canse; FM Cfoeoilsy ofTaillrsgs Ealaisssad ileo, m); Tailspp: Trassi Dassnae Cosi: Isiolilast): Daaarlpli: Tda dar was esesslnseled as a siasi' dike: for 00sopo:so;os iippiipyppsi r;iialri.g, arid spisorood OI;ooIio Ip saiidsi alar, fOsi::oo liso; rdiospi, asaletepilea appersredi m kods pleasmessa, and taarss b'sdiaily issoosoi ioy ariaariPg sairlp iooiiooo Wlii Ibis proaad isseSplsaa, a aaoraie calali wall was e05ssps:i ifesisgb Rsa aasdaakataai ad mio die 1 i;;:,:solorip:os, Ssklailc sIosoossossopss w m istlrssidas} to idawiag rsf iasassitel-iop gerspairoa'; dial alteta! ieo-dllad joidid in fsasadairosip roak So irsiosordd spapage arid gspipg io oaPar, ioiisissoo Sl-vosiso-s I sfiis jpisisSrsO ):<.: I.'< DamibSiria tesssaa: DtesRaadRied Mims SOsKSiiiiisa: USA Orer ! sdoga i pper ssappasia Dam fbgid :m); li OaSB. Typer W Dam FRI Mlaiarsai: E Ititssoriaiteate, Vodsms less, rd f iisasda): IrsfirrmadeH; Dal iisosolsoss Typso: 2A Ciossso Eid Cteisitte of Talpas Kateadssl (ca. in}: Tisiiltega Trave) Disfarsea (m); tosida) DsiPocisto; ; Cttm ilig. b fte evim c n i i U m i b m m . ldai 1 tim i Ibernil$ti>n- m i termib by zi H:m% SU >v5>:|> (i w i& m ll$ :;<5?iy i m i tyg ii im m x m H m SgMdibg m ili Ss T'v 4 nm d -?iR S l08- m. nrnkbiig:. skim gktij mi b 0 m . m iNv fE, Bmm gf&y m e M a-z u m suited Ibi B i& tt : Vf^kiteNv. Ow, t Set.;>c:kyW Irsasdiedi N,s IJ4 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 133 of 145 ED 002061 00172724-00133 DossedM Masse; liideasifed Miss M o m m Esrsps: rDTsalrsp Type: Dos fleigfa: { ): 24 Da Type; VII?. Dssssi 220 ivssvevvv Ri Dapossadiasnit.Valsane Casi. si:); tiseldesB Iisfsrisisdl Dais: laeideislTypsK 24, Casse: FN Qvvs'vvy sii TolsslgA Released lesi, gl); T e lfe p Travel DiatOmae{re): fessasi Bascripaiais A issas'ala lsasi sasetiftO asaltar disia was essssabeetad assi a [assise: ?ltoe Lioesdsbpts. Aisbotsgb e gioia bleaLet was placed aver eapsaed losessasPa. wsSbiri lie bslpassadsiserst sassi, a aasaber ssf ssiddsabss des>eksgad darsg indiai llliog iha drssiaed slse rasservoir, Osa area sai sisaisdsoiseSsasaatioa wiss ss?dsespsSsaaa lisa sailisa eesssoreia is::;;ssss, siasi ovvvvvgsvsvv; 'vvsvsisvi bsiesisonsseesed sabsdsse Ossenes ss slv; sssia se; avail ss aslerevo cavea sa ta dessi abanaessi peas' she eresi, ilepaisa sisaioded ostrefai eaessaasiaas: saf sabilia ssVvsnvev essdsdisg.gdsg wills a siala ai olisse: assasse assi eoseside seosiigasaid by glasasiiseisi o f lO-ibasi sidek miao amala layer over Iraaied stessa la bridge: esiti pieg potersi! Ssevevv asakswsises sbet sigisi develop, Sesstea; Rdbbwssa arso Tidaad, 1773 SARI T f l ; WR NODENT TTFE lo INCIDEAT CAUSE;: ST ;<!<(<as Hti, Si DasFMsoe 'bisoe: Ireiysibil Mbse Loaaisassi; USSS. OssETabisge lype: Dosi Hesgits; fas); i d Daos ypo: WR De FU) svbdebeb E lingopodosap Vdlsasse (ea; os); Itcidesd lofoemsdlo; DaSa: IgesdePtTTpe: 2 Cao.se; ST Qisaatsiy oTsiilbsga alasaad s):. sss): Tasbogo Tosvid Distases [ssig iaeldasst Beserifsi Tbe deas w m beiog M i ** a aladeo diko tbr ssslssetstsesd ispabeaio: esssteasstesesil rsseissg:, Usad iabsaiy lo rasosss water, aaaasals seepssge dseebsped es tbe Osialaos o liso wresdea spbiwsay ssisd sise isosedadois. Tisis wsss ateTbsstd te sise j.ioeo sovisv o wbstseroossaiosadoss. Seisroe: Siysssov, V7f D VU I VIH- : W |( INCIDENTT W ; 2 sm les- o ; i vs;-*;, e Q la rD e i' Do ; J D a'i 'dme Mm a to n o lisstieo be Ecsiigsssp Mias: Loeatsots:: Cbiie naTasiipp Typo: Ismeeioas Doso Idasgist Isas); 3 Paisa Type: WR Dobs FIS Matebgi: ft S s : : s | ; v : i o s l s e :[ess, sis): Itield ea i tisiomsssas: Daba; 33CiN3dd iiseidiisss Typs: A Cassae; EQ bssndisy isl'Tdisssgs Iteleeaed Cois, ist); Tasisags Trsoelt Dssiaaoe siri): laosdosst oseripllotse Tbo sso liiil oioio oilig atsdaaiapaa -sf obost 1,5: i .CI IV ossbietod S;a lise MTT IT Fss Ligne eanSgaaka. Dastsoga satsatstod a i shallow issopifoalssiili araoksog osi lisa ore:, Sosie:: D'bry assd Aivssiea:, IVs? Doot t v i f ' \ \ u f h e m C k i sv rie ta iALHH AT C U Ar iS ifeoislessi: Mo,s 25 f>sm?M!ne Hoesae: Fspobt Lake svlsso Eoeadass: Bristab tfolosobsa, Casiada ioilisilsssp Type; taareessy Da llolgisi Cos): 13 Dept Type: Vv;Sv .Drais f I biaiorsssl;: I; Isisissoeadsisesit Visiome (eo, ta): Iseldeaf loforBlatiOH:; .Dole: 1771 laeideal Type: 2 h Cssisae: ER. Onasidty o f TaiU||p Roieaaed Svv. TaiiiagS: Tmvel Dkidtso: C?ss.b ioculves Ov;.s:vtj;l,ses: Hie Sasissigs desis oosssisslpd o f a bososser;esa aeepoa o f etsssipaeled glacsei l). Waler sleeaiaed Fas se ssispirossdsisaot llowod sss ssa ualsaed ebatsssei piaaliai io die doarrsstrssasd io* a f ibe dom, Sioekse o f sho sisaad ebanisel psiodaead dawacisdsiig ssf m aioels aa 12 Set Tlsia isiggered eraebipg ssd liaioroissdoo o f siso deooissslreos: embaaksisept: elopa-, wslb ssuwosiseaD satsbsd svlsisi laeosteisse isasdoiks ssedbaea.es ai o desesis oosssesdoisi svlds ibe eoxiad oloimiel boosaio, bfovaaioata: weas: atalsilied by piossespaisl. o f is borot stad eaioesdoa o f ibe ebassisal Spoeee; DrsMvaor, i V'vV D AblTTBEs WB. IbtC ID EN T TTPEs: 2D S C IS ID T CAUSE:: E Issokiesii Na,stad Dstsss/blsae b:as.a: Eoikovae Misse ;..;;;..;,S:..::V v d ; v b v :v . btoeSatSgas, OsivTsiasios v;>o: ispid/estss; Daos Flesglst Csts): Dos Type: WR Dos Fils Molas)et: Fl iaisasapiiaieal Volotae fCbi, ai): 3,503,01)0 I aebsfpi: 1a ftr alts i Dase; 1i - i 792 lisesdesii: Type: 28 Coasis: ER Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 134 of 145 ED 002061 00172724-00134 ofT ltn p RiiSAsd(s, ta): T?ti:p 'frs ve! D him .:?(:i.: hrdm ii B m ixti &tl with Ut Bae fessili ij:h^.p 'fU $&S%$tt* "i m tg ereds'd by Ifeadas! M %if Tii feal'v'sh h'15Ci<ic!-?i- .t CiTvSi, h u i w M 'tT&ppttig, RI''er divaKas.. Silii tt# prnmmd hy S ilssias: UN em a^iiV ' i& prevm piu M saa sisal w\. hii'Vii: sslcpied siasb. Sswarect NOE, 0 A tlT Y fE iW M l C lftliTTYY-Es 3 !HC IPENT CA ONE: NR JsielfeaaS Ns,; SN Oaas,:Moo: Smt&^ Ridi Miaa: LpaaSm :: f;te vt O lefrasbaiga TxvNii's3,. ig.pj Oasi? S-fes:;gbii (m): Usasi Type: '&sR D m Isisspalssdsss!p. Vites ssrs:lsai la BsrostMP: Das: ISISUS lasbisaiType; 3 Csp: QpassSsiy s f Tasllnp Eateassed(, sss); Taiisssgii TVi Dspfasaee (ds): k i m saersptfsss: SgSiilcipNd p! i i -: i 0 h; ISSi 3 ' mpowKtetamt bais-ss # ress;,-! ~ ss aua-set ypssig dsswpssssassi ksas sssa dam dssscssasv ss 5.gpm- SsepM * r semos-i r a .a,osss:,`S'i -dasss;smd pssspsid " ,'k , !fe' ms. <i ',,,! s; So?: Nevssdss U> o' I <o v* ' s so ?! \ '':/ SoO , So W a le r Nos, Ssvids'd N-: 33 asssiMIps Nome: am Me, I Misse Loctbit: Eilissi Lab Cfesis:sie, Cassssda OsdiTaMlai? Typ: sssaSsssa Oliai Ue(gfei{ie}; 9 ispS Typ? WE Doo; S3i SyfesfeMssfe: 3 Isstpepspteeai Voioroe (ca, ps}: IsseiMeai 5sffesotssl!sss Dse 13?::} iMasdsai Typs: 3 Caos: 'iSiooOosy sfTasilagss Rdsased (su, ;o y TssdsSgs ?rss*l Disiasse Ossi; SstasdePl sscnpsssss:; U- > i?- i ' i'd l ,' i'iv y ' 'iS ' IO ' id '!, t! v ; !,!" I' T a ,0 'V 'C i't s'sl ,, ' > -! ! w !,''! !! '! S ,?v , o s i,! OS * , a ,, * o\{ bo res e rb <s ssmn-d .rife-ssi sso-er-r? ioU !,, !>$,! \ '! ' ! ! >00 O >>i M ^ uV m i *' s i. ' < K U P<>,i >,,< s: Sn>'o ' ' n:tto<!> S s,re -moY '1"" -! oam-v SOo-K, ? 'S IMO Iaditesi ST<; Ni ! aasAMisse Mas: OtsideaiSItss! Misse LssCos: Csifimssifesaesy WV USA tWTdliogs Type; dass; Para HeightCm}; Si Dass: Type: WS, iiSoos SS3 SiSiScriiS 3 Impeisssdssteea ViaMrae {ca, sss}; (seid? itfeemai:!sB Ossi: ! S?5 Melders Type: 3 Cssesse: Qeaapsy ssiTadiissgss feleasscd (era sc; T ;;S o ffi TsisedS M s t m m o : Aiosoiaikov fea dm Wi led I0. imUn Utilifp :and. provldc mmmn ?f Slipsm i fessss tesssa sssi:M bai sod ii sg, fltw h M m iidRIcm% 2d $d; lligiv :iiViiiisRir^d. m ik wkh o:pol imm. m i k t ih m initial 1;? im i>Tpr&t%%t i&ViM1 i m t l Whii im p ige to m dn.Ri:g hit mH m imxkmx i d 00 iko iw m tt fmm. s.hc 4m&,. iisiiid iid '>^ givmtijsgs w w p :m hai fik ;:&.ilO p !iw- mzpmgo, Ssibssqii'viRi;5p m m K i Q ti.'took 'fit-on ZKtm sM iR. tlig- uowMmmi i?:>: ts5 m o h i m X0 6 f c i od bsoNlCid: saids 4mMMg$ atesedeS, IWssspsiap tas w!b Myissddd m T? ssyareepscr Pcosels wss Scesi? w prevmtssg irtb? S-; ! ; o.o ,; i;' sasgHSffca, frmwCv: AliiOviivttSt i o T a r o ; SiO; : < SSsosSSSoo; Nasna: ypidessisicd :Mie Uoca&sa: W T, USA OiTaIbiga Typ-; Sosoo; Do ; Ncsgld | i): 2A beps ly f : WR 0 F iii Ntasedsl: B iiiisisiisjo-Oj-ii'o;; VisUAd fc. OS}: tasftsas loToi'SPdU&PS t),;;,;: bscidepS Siy: 3 SiSooo:: Qasassisy a f TaSSsp|p RSeaassd (pa, dj: Taliage Trace! CissiAsseeoo; iOiSeCOS S>::SCfO;j;,0; lis a dessi sasps coastmcsedi sa resa&s saSiiaga aad oviipoi oio SlaassS iSpsas Ssss:a p:'as:ss;s! S:o So sufi, a?:sf ipcjaslad s eaSssiT Sa radaec ,sapag sliissagS digtity iSaesiscesi Sas!asas:r, edsaafc, 3spp5siaSa:Siiy MS gpa s f isdecsaepisg aesasTSd, sesisasydis giestser slsass asssieipssSiesS pcossssSsics sissd ssf aasRisossiaSaS ccs;csk SSac Sa depassU si psadaced ssss fe gssssad sssIU.:, Wss PSsaadSol as W afasp; s mi pfgsaaea isi a sasssssdary paod sioscasireasss saiscaa :s|sag oso: o o iio o o o S oio csasesesl Sa dsa asais iroixsaad-asaat Spssrae; Rofeiraoa sad Tssiassd, I3?|! Ipald} ioy,,: }SS DaosiMae SName: UNtlaasfied MSaa ioscisiSsss i?/Tas!spgs Type:: gold Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 135 of 145 ED 002061 00172724-00135 D a s fia tg h i (m y ft DassiTypsit: WR Das F ill MstStrssti: E IsrspotssdeiSiVolasoe(css, m y 3eiferst 1rsjfe'sssfetsr: Dale: Itrekfes: Type: ft Cgals: Qrsssaliiy fTaifegSS Rstfesssss! xts ; : Tsstogs Tstvui DrsstseMfe); tm i m ltssfiim m The 'm p n m m i w m feed with 4!i-m!l PVC gaorassiifestsee; wsthstsi tryerlyfeg sortir, Dsssleg: soils; lalllsrgy depssesstts whets feslftrp bad setsssraftagd ovsx the linst' o sst ssetsdrge slepfe i k.::g; tlx::; Ost feet, ;xs ;: ftoftftfe stoefepfe feistesfh the tifeer arstl hired sfesar W feet over a iDQ- disssiseSer smot, The tssrtaa o f Isatole ferssets w m sset iJesetroftresi but tassy baye heee |g festitaifes o f teeter ex;; feats sufagtads sett srsotihea. Tits Issstr over the halb! spatreift allowsag si ssoall t|tsa.utfty o f raillage asst xi;oik hoist to esospe. Toe i;x ; waa isrpssrsal after deaoohstoaMSets sstsl elesasap. Other ssttstlter bubble steal were vested setfeg ss spstesal ttpitasatfeis; ftostma: Atsetsdotal kktk kk i; |4ft Datstfelise Mesaer Ustsfesrtdfssd Miste Leearksst: CM, USA OrseTsllftigs Type; Data l-feiglft {tais; Ditto Type;: k feasts irsll Ix itix i; x 1stposlseiest Vsiksste (ers, st); IssSsdeat Istfarsststfeat Dare; feederstType: it Casas: Oiixsstv stf Tsllfegss X;;k;::X:;x kx;. ra|: TsdMsgsTrsrvsd Pfe&ssrsr{mj: Ihestltssti 0 pti A sm hk'Uk m e r<| ledeea tataecep;sabkV., (if x m M v k m <k fetsasladt iv-r rhe- cuiori Itsstsshed so . i& pth po&slhie ah!m ixt. eape:! :| esi'm&tkm.. ik sasderseeprsge ta r ugh ifestrimd reek Iseiew the tssstrsw o f ftoi eatsif were srfeaftSad by gfeaaoefes's aroi festally goasted, effestivssty Sasseee; Taytol ;xxi xihXx;;; 58 |4 BAM T i CEAVITT INCIDENT T r 1A IfeCIBtfeT CAUSE; ST laeMestt Ha,;; IBS feasts!Mfee Nasfe: Mise Loesstfesr: habrrite, Misas Gerais, Breed! OrttGxsilfe:gs Typst: too: sit Cam Height to ): ftil Darss Typst; Ctovty Das Et!! Msietfel; Masastry ImpestaftsaettS Vsrfemeleu, ar};. IssrsSosr, Mfesro ssoo; ' s j w < , po - Sx I .si k j t A s ,s > f ! t,,fe x, s\ ,s Tefest E I topa:' versa- 5est ,,g fesisosv, _r i P ; fe tssesstxss iitnriptoso tSrsi.si, >'ov x >'V, j xsass s's'g or! *v.rie i eso in ,st situ ss; xl sv. f e; s! s- '<i o r s ' > S o so.,s > ; * sx -,<<!> I . o f as'ssoy tresp, aa, is i -st ,est esa"e sd r ! ;fex;< : s ,30-r" o-, N -',, U,*, s>, ' i>o ' 5v m D hdl IV H , Vas ! F \ \U W tSt IDEA'V A p i 18 to ftto l'S s fe d rx ': Os Istaldetti To,;: iiT! Daat/Mttsst Mauss; Kfesss sTreel Miste Laeatta: Ttssisasast ttvTtiiltogs Type: Data Height Cmi: !? Dass Type; Valley aide Dosis. F il Materia!; Itopotsodsisero Veshssoe {art, ssii; 30,1508 laelslap M o aaas Dale: 5*!a-!Vfet Itarfeetss Typa; 11 Cause: OT s os!, o ,x k x \ v .* ss sssoxasii Talhstgy Tstsvel Diahssts (rp); ixektoss: Desrrts:;shxt : Dasa halft: to 113! h sa :xxx;;xxxi,xl erxtxrst osofely o f Sathags, xa.b etsst: todhi of 1st sod tlavetrehess slope i;h Oveaoppts ssrfeg ! la 108 yessr fessai Dsasr feiesl, spsllwtty ehiiefe ehmeslefeaseil; ptpelfee fees! stai eaasfeg .lather pellape ofkeaiertassy, iaareet feapeetstr o f Mlpsa, Tsssisasrlg, lif e ! M F M V fe tik ts ts s y r ;X Stx IA to t PvS.AS s -H ht M !aefesl: fep,;: ! 0 Dass/Msae ftlsarse: Wesseot Nuefeai hihse Localfeo: jeifeey Chy:, WV, USA Osreffisitoga Type: Ufeolta Dos Metgist i }: 0am Typst; Dsss Stil iMfeefesk topoPadrsseot Vtsfe:s:eteo. ;x! IrsshdeM Isifcrmaftest: lt * e to ' totos* 1 C:ar:M Qsssrato o f Tssifegy Releasssts! lea, to); 48 Taihogg Travel iDUtaatse (si): laetiaof Derrefeslosst T 'h & m s k = lP *& maps r i h m VA, m i t n k : | =>r m W ioe m p m z In i ibi2 m b b c m m ' s u if k i- ZR i ll w y v &rtoppmg m 30!zm. AbK k . 2,-3 jmiltiCi ;g i b O iS 0 f xilmx V<.& k W i \ S h\i&ta. t i l f t 3 3k i f i x ^ M t k (X;i: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 136 of 145 ED 002061 00172724-00136 Sosli'eo TsNraaD'isr:. Fw , a 'S ineidasA No 1? Dam/NIsne Namm N tto Pascalies!:; Sloney Middleton, UK. OmFMimgo Y^jsg; DiiiSS HAggl is'iSiS Um% Type: Oas Fa! fdabsdai: Impoundment Volume (MU: h u id ts .i totsaramt; Date: OTTEd? iodswalTypa: ;A Cod; St Quantity efTasIsaga Ralaasesd: (iera}: Tadiogs Travel Disrames fm): JsdBS DessrsptmsK 11m femliaag dam o l a saidisg pond fmms raod fe w was dasswggis propefty aod mads. Soar; Ferawara ami Charles :HF?8 Isw ifesi Nsas IS PsradMiee Naas; Bilbao Maw Laostl: Spain DooiTaRissgo Type Dasa Height {ml? Dam Typo; Dam HU NimariraF: R Impasmaismai Vsdaas (on, ns); tSSid'dgSSt MM-msi-Mi;Dais: track!; Type: FA Cassia;: SI Qissndiy ofTainrags Redoisod (era, mil 'US,BOO Tadlaga Tvst Diomnea (m): 1stdg Dosiptlsm;: Slimgfiing o f ids mafcldl dam Edlosving iseayy miss esiwed iasf: stiakss m ilw naiasssmd iasiirags deposit dial tadiiesd tipseftedran and matings itnsssSiding, wills maws;' dawssisssals diimsgo add Mas s f life. Sias; Smiit;, I99 DAN! T W IT NR INCIDENT TTPEi IA INCIDENT C AD S i; SI) taesdem Nd<; U9 Pm'is/Nlliss Name; Swaenoy Tadiisgs Dssas Elisw Location: Frangmom, CO, USA OiasTssiliagg T g g a : a n d yss:s,rs Dam HeigPUml:? Pani Type: Darn Fit! Niaissml: imfworadsoeraFRralrame (am ml; tdoldapl lifa im a iia m Dam; 03->OMii iswideni Type:: h Cocao: SB Quantity isf Tattings Reloasorf (as w! TaliiagsTraaai Distance fas); idcldaral DaserlfStlom Dam ismsetiad dsss: to piping sarnsmt osite; India L Saos'a: MHSA OAM TVdd: Mi INCIDENTTTEIP !A INCiBENT CAUSE; FN pit ;<;<:! N4 20? DmmNDas Name; Oraldee Casas ivisisa Location; Wadekoml Valley, Naas Eealsnd Ossi/TNIsags Tips: gold Dam Delgin (m|: TS-DC! Dam Type; Dam F ill Ntalgstoi: R Impraraostinent Yratraraw (Ms): 3 taoMeat: tafnomitiraa: Dam: 1.24995 PsMiMis: ;?;><; IA Ciiassa FN QraastRy o f Tattings Released (eo, ); was: Tastings Travel Dtsmswe(so): Iis::siasi; Daam)pils;si Dam wan oss alley aid and oiigpod tmdily ora pi.m e all wimkaess atioas 5Sm deop at AsIsadora feowye* issm Rows assd lama rnamafa! on wlssad: dm: Asa; was Ma:s:MM Cost s i aagaT NTS JTNisRdft Fssisass: Mlao MsBagcr, Co Golden Cmaa.: Isislitessl Asi:.; IF? Daa/Mma Nsmse: No 2 imimgs posD Mine l.aiia;.::Padaoi, laj&on, Fhlilppisiaa.: O R /ia ilia p T?p: aiiggsm Pass Higlst (ml; Daw; i yai::: Fd! MaiiSiSal ls?spo:odsaoit Voiassa {MD: III Ismldassi: Irsferasaiijisi Data: 014SR2 RwidoofTypa; IA Cdsda; FK iys.as:;;s:!;y o f Tailings Dalasssad (Nil):: i(i Tailing Tmafsl Distasce (m): liwsdmgr iDascalgilaoi Data colkgsad' Tdoagdt m adam doeasliigaF" is laly I??si 11; issisisslsii bafosslsassil 0 0 0 ; : iS;; iiSiiSSi C O p ImATasa No.; IS,1 Dam/Nllaa Noma; Williasdhoipo NiIno Loaaiios; IJaRd fClegitom alisss/'i'sisiMss;s:.:s TggiO soni Darai Heigll Ci): Dosi Tygra: Dass f ili Niamdai Impsimdmsni Voitm (cu, so(: Iad sia;s` totaamEo:sa Psila; Ifd Isiisssiiisi: Tsysas | A Cisissa; FN QosraDN s f Taiiings Roiommal (a. m): Taldsp TiSiViii Isiiiassisas (iiS takli Dosorlpltoo; Tise fisilyra iss fiiaagisi: la iiav: bsmo irigg0:d by osmass soasidaarara poi messo, Ara: sdisraog, iy " .l issassis si As, S`!.i l'iasisM A s, M iss a sOi miei Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 137 of 145 ED 002061 00172724-00137 Aflea bseafleu: Spam OrsSTsili ags Typs; Om i Haight Ssef; Dam Type: Data Fill M m M i Ssyipssadssssts Valmaa :'cn. a;}: fssaSSBalifpeitsatess Base; feeidasi type; Cas; phf Qissitsfliy :;: Tailhiga ReSesseesi {::;. :;:f Tsdhaga Tssski Dsasasee {tai;: fessdsstf: Dtaas-spiswm The dam had tern aeasatsssad as a toygdatiap aoaaimg aid islSmp, Lsisiaai apasadhsg asd IbaedaSiag sisssists Srsggesad liqsactka ssstd a kaliags iioweiida satsssrsd, Soayaa:: Sedih, idsdi BAM TVERs NR 1NC0ENT WEE; I m c m m t causes o r igdlsfads Nsa; b Dsts:P/Mipss hssstissi:: ISegpss-Gayoe: Elms E-ocasiOis: Bssgasss ysTt diayivt, biassm, Fisdippiftssa OmfTasiSaga Type: Oak! Bam tidgist (ap:: Cam Type; Pam Fsd MsSesaib: Syapsesssdisiaas. Vpbme (eta mit Ipgidest iafAsma:Sjaa::: . s ' SO' SAesdeaS : vyi: by lb;:;;;: 0 I Qtsasiiiy aiT&ihggs Eslssased b;v asy TidtSssgs Trsvd Bisssaes 1*; hu-idc-y P.-rOif ob;:; Dsvssssee Seeaal Saksag asaar aaasesd the iaseossadssssat,. hleekad, sastabag Hood wwet sp assist isispsBadasspt east aassitep dam, Racial ibslsee, ba. asiliapsa cif paa ssf the dam, CssisSsskssiefy easssa; syptssoss, Sassras;: isegsaeSayee Elsess im* 'ms He, I 1.. 'dry. \ ,,tv yp '*'>! k i w i 'd l k fl.s b i. mm feogv< 11,114^ a- " a lass, sy> w -'Ja rs',-*; Dias 1 < 'a ' a -' B r i I p>- I : a.j i'i! ''Ei* *ssd ("T *'Jitor.-.tt, v-jasssei.t mi II-1 5*' is e sam t iaoe'SSisohte C ti'C-, t r -tea b 4 G - ox ,, Ptt', * i 1 t Visi vi. t ' 15>1>tr> ' A, P 'Iti, >xum: liias'",S Xi'! omets* A ^vxrs-Ei-h ss >i id -s tu rt>-<n upiiig fni < ti 'U , 1si . A t' ' \ i > \ \ yM f , p^v' V v'f<y A bukisixS Hep did Paig/Mms H s m x Withesisdssfps M i SacAm: UK sDywTSidlmgi Type: esss! Bam Hatghs (sit):: BseaTypa: Bate FfllMaSaisah MW' fliipsssxbsssssit Vsbase (MSp i n m im i Issidram dam Dam: 03-24- i skid issasdassi. Type: IA C at: ST Qaaciity eiTsdliSiga Ratamed Hassa): TalUpp TSwai Disdsace: Cat): teidasia BesatiptSaSs A siaxay psad dial: had bsg 'bails ddt die Ghi B itiT ip aoliapsad, saitdmg,a flaw of tai iaps otair aa adjaaasa tad wiaefe waa eavamd at ia dapth of 3ta atid tEaiairisd ebaed: Ibr iS dags, Saarea? Ftaamaa atid Chasim IdflCi, faaldpat ideo !2J B w rM ba hiaca; tywaaw Mica LaaSbP:; Ehsiodda vafty, SssssshG i/b AfftnAdUggs Tp|3o: esad Bara G eliti |as}: 2$ Data Typa: Dai FUI Msterisd; AdWIoaaoaadataot Vxyaaiy ( tta.}: 1oeidaat Itddnaa ll : Data: 02-29- fa i dysibty 1yya: A Causa: Oi Qsaalfly itiTadioga Ralsaimi (hsoai; Taliidp Itaval DHiaaca (m): 721 fmdfeH Dv-uxlpd: Lapap hm bae fecasi la itaas ni wmte em mougsaii: aida. 'Whaa sadiags lavai m z M ifSmt dia dowasloya batid hsasohad asid ^ t%hsaaad. saiihtgs Bantttsi desto iewwbs sha r?vyr m aaiaiud iti: yodiaty aaapad;: s alavaPsist 6^,f;. W-iia: l ttuplBd Swp or teee: asm, ISaessd imly hata gama desea sfls sbafi. Coti sa dia Cosi Bxm &bosd: 3,df :stia tisit ea). Soafess lietiha Rapitftj Hat hlajeagt Soidoaary Ctifiaa, Idd i, la eldest Uo<: 124 DggflGiaa Mutm: Tymtsvt toflian?. G "G s '. !! Si.!,*, . 'A a,; Taffaiihtgs Tyyo: assai 1 Dati Haig>H(Al)! Gassi Typs: Dase Fill bta'bdab b j bppoim msnl VCHiTi: (MO;: 1ssaid Data; Asi$\ i biaid?M."r:ypi?:. | Cause: OT J QaiS?Ut t Tajiisii's .E:0:vs4 i .Avs); 1 Talili Ti'evaI DisteC'f (); f>43 fodsdaaf B z m n p ik ii: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 138 of 145 ED 002061 00172724-00138 I ,-i.voi mi V ,! v ria d r ; m ;'< i f c >a w Mb os A s-by -tfe airs ~<-'sO>.M a fe -a i . i r , , ed e mg, :< "msgr ,*' god i < S' fe 'if-dsos; :b ' '.e c fe '; ' -ill K v ; i | n j on : ! -*1 ! 1 iM lii. <5 Olga d, > 1 .it b u n 'll'' sir , ,,f sac Rba'sdd; P >rs J>i-sis\s' t . k 'ia iir j ! ; i " " - . t *- ' smmrrse td: i <, Qw' isseistest Nssd ! 20 Osiiiifelias Nasse: Uefet; Cssrisklii Mass LssesSism; Casa:a River, UT, USA S W '" i 1 >i/- i Ai CiaOJSiSS 0 Mefeissim); i - - v Sfe I ''-I- is; -i n,~.<StiK'" l >*r ii {s. a}: I'iS iS l-m lokorSOcOliOS smse; isduswdtitay '"-U r: h p : i \ i -jiisse; OT ,.S:S;!::::V S:i | iisb O g S RSSbtsSiied E i S i} 8,400 Tsdlfegs Tssssfei Distarmi? (ftp; P i e t l t e S l T.Lr< rU H -v-t:., Tb. ladings Asks Med dseasp a flash Hood, addi laiBrigs ardi irsili etffees? smsdsfeg e ereeR asd ssv-ge Me SsKisesssse se <Is:sMvss;d mbkee wes eosed ile Rie si ver, Sessree; uh ABC, ssCd taddsasr N,s se Pssesilkfei .ss: ;s::si; de; Nife lesemi: Oee/Tsiliegy Type; seee De; Heigfss yei Dis Type; Pii! fvsterdd; m p viiiid m i'-rii Vkkeefee.. sa); Isssfersi Iaieneetiee s Dare; ieisfeei Type; ! Csayei OT QssaeMy ciTaMfegs Reiekss) fess, se): Tsdkegs Trave! Diete (m): I ideisi Oeseriptksss:: lise fewer isepaaedeseai o f Mas disposed ssbesii v.m rider csrskw:doe, se a valley aspseees tssth egee pger orse, A ssddl isedweee Ebe two 's'sdieys Issa a smeli desti Ri peayissiS:ovrifessa A i a Min f emeifasK water leve! se Mie pper speaedassep a ppieg faifeas eeesated ssi. sis left sessi ad' she stabile dees, eMeasleg: water feto die lower eepssisedmeat eeasleg averssspplef, a i dse Sadiegs sts: siisifcr eoestrsseti, worSiIrssi osi e W5sidemfefe assssisKst rsf SSL Use eesdderd ceased SsipMlk-ssssi siaky Se dia perssiio e t dtetOserste, Sgarse; ICOLD TaMtags: Cloasmista, ISAM TVPP; ess INCIDENT TYRE: SA tHCfDENT CAtSSEs ST iestsei Nes-s 301 DamiNifee Nata; Maasopper MStee LiSeetiea.; fesfeasfesiaP Isietli pMMippfesai Osa/TasPegs Type: copper Pese Height pa)* Ossei Type: MMI iMsSerie!; ieipaegsleiiet Valeesefew es)s teetdeet !laressMae: Dafe; 03P4MSSd f eeisfeel Type: 1A Cease: ST Qissspcsy ssfTfetfegs ReieigisM: IMP: 2 A Tailtstgs Tatvei Plsdtaea tse): faaidess BcsfcrlptlSis TasISags heieg-ssrjimi fe a wsiffeM-eas pit Msat lesd bea PwSeed shaeagb: si 2,2:sdes iaep sisaee! ta die: Kcr Mtifeslapesi Tilia bed bee plagged wife soaeees esssl tba plug fedsd. Raw o f sadiega stsalad si 5 ta ti3 ai;!sss: aed cssideaed Gsird daysRafesaed Ifeiiagss sifesad waterways dowiissi,. Heisvy ssMiteeaDMae fet 14 ta> ead: oes Tisefedai wasbed sa rivetseaafe 2,2 km Rase Sisares:: iSseirs terre le,, VaecauyarV X I RI, Caemie, SagbfceS Nts id ) Wsr-y: r-, Nsret Pe i *s 5rp t ed ivlsaa lasaiiae: iyteeisejwa, LawiasMiiitipsiissiei Om/Tdiligs Tygsi; sapper Dasa Hsigiii (es); Pam Type; Osee: Fsi! fdaisiiid;: E Imeassedisseis Vifeesa (da, es); Smidsm teiaresiMaet Sdss; MM?-De sacsdait Ivas; i.A S'ees:; a l sD eaasssy a t I a t t o r i Released (Ce. sa); Taiilegs Tessei Ditssiee pe); taeidet EksscripRssrs Date was. asi ee imeiesii slide asse, eed a.Lasas a *!;' i, * - ..i'"* d ii' dei esta beigisi hs b; r dSi d ;ss- dses 1O i. Dseiiss lascer swaytoa ciare: sil toa asma. r-nirgi .galeno *\>'b'er_ SueeigCe.! '-i, b 1', di 1l'i ' i -i Isieidiissi Nilo 23 DeePblsso Nesse: Cesy fs tk Miee Lecadoa:; Tissde, DT) USA Oretlfediegs Type: essepet Dse tleigbs fei); ill Das; ILora Efeesp ili blaterisi; IsepesipdiisesSI: Vsiiasiist |ee, so); teesieat I ettseasesisast Date; 02-0! -1MTS lacisfeat Type; I A Casse: ST Qaetstlty otTaMMsfe Refessest s;ee, ei): Tsltfegs Tmyel Olsieeae: (as): leeMteecDeseeipMe: Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 139 of 145 ED 002061 00172724-00139 The embesCmeoi bmeefsed des kt ovetloppmg w k m a abdo Reeked the spillway Sh:30.it0: % iiw w . esHLA Imddasu Nea ih i i.sm; Seme Neme: 'W.tWteep Noelests7' M im Lesabow le Cray C;ty, WY, USA CAsOlabmgsTypa; emstksi) Dom Hkghi{m }t DttmType;: Osai RO MsStemtb Imtsmsidisiol Valmoa (eu. S3): m l m i 1rsi m matm n Paie: M 3 A 9 1 1 keldem Type: IA. Cimse;.$T Qaeolhy o f TaUkgs Released (ctt- efg VaOtstgs Travd Dsstarsae (tsi); m M m t Btwedptkm A bfftsk le the- Le!legs dtmhat|pt hoe coasse the dike io hre&th me. toihop: to Lew kme pstaxi or 2 hoa-ts. No trfissts:; eosi&mihede-st teseetredi. Seeree; US AEC, IR?4 d a m w r i t m i m e m m t t y e ic la INCIDENT CAUSE; BQ soldoAtNoj UN) Damdvlioe Harn#: Vais.-de Agm. (shoe Locrmoo: Chile CSe/TslIUogS TypC: SlippCS* Dssrs Hetyh: (srs); Dam Type; Dis)i f il! MaPeal: lmpv?uabts)e;aLVokme (ca. ra.|: Imbehmf Itsfamasdem .Date: INB m i m i Type: 1A Ctmsa; BQ Qaaahy of Taslitsgs Resesrsed Cem m): Teslstsgs Ttsel Dwta (sa); IgcIDeoi llg'geripllop) A, dso 8djS&& t Vco:| ?R Agile N. 1 (diOigLiitod Dom A) b reported ;a have faded darseg sm eardigaaAe 1st IR iL No -Otises' slstsira am evm kv Somme: Castre iiiD Trotreesto I SBA- iaebieoi Nmt 12? Doxi/Mosi) Name: Vom de Agoa B' Mme Laeatiow Chile. OsedisrURtgs Tymo smppar |>em BAgR (m): Dem Typer XDm RL Mstathrl: liripiaatlaiae Voiieme (aa, me Lisidest I aLeemstlsm; Dote: 198i kckleni Type: LA tsiis: BQ Qeamity of TUhep- Reseased pm., m}: Tedhags Travel Dlsteoea {ml: losidem: DserlgEee: A daet relhateot so Vote do Agets Ho, I (deeDomed Dam B) b reported id have laded shmeg tat eerDgeeke hi ILLL No other details o.m evsrlatde. Aie s ' l t ) > loesdaet Noe 9 9 DaxUAfma iNme: t o ip a . Nt)- i Nflae: Leeahett: Chile Che/ i 'eddigs Type; xip/rsf De i U ^ i * ! Dora Type: US Data F il Mmesial: 1' Isopoaodsoeat Voiatee (su.. m): m m t itU rm m m r, Dele: ii3-2TT96$ LxddeatType; IA Cease: EQ Qaeatlsy e f Iblilags EeNassid (ess., mk IJ- Tediags Tmvel Dbueee (si)U laaidastt DeaerlptletL Two eeesly sdetidetd apsResaii type dataa leere Lseoted: oa a 30 degree emaoohoAde slope ead. ased elternate!y. t)rm No, 1 teas breached: tUxnng the M?*? IN Ligtsa sissriiagiake, cUeashte e eoseli d m - " -N ;mm six ,amer -mmeo o f she ;axmr:aoded lesooga. hsorce IW x ira su rm ( tF67 tsirsOasts Noa t.D U a t Mai" \{ , re Ui <^as iOed M o i e Ssssja mee s iD a mgr s>p' fi it xMmfa ssas st s >{ D ^ e ai s s^p^-e 1,, ma \ ehme tee mk laebtem h m m M m ii that Ois srxdrt.svee LA Cease; BQ: Qesmisry of Taslsup ReL'esed (ess, so): Tailmgs Travel Dismoee fro}; it?eldest!: Besersiptlasi; Aa emiletueke o f MdDN the!: oommed k. srnrivm Bert ' di-a' mp - weefe o f hestey mmDd aasxiS SsMS.Oai a ashire o f a tedtogs ermm;m,mi ix.mux r ke vleiosty o f the emoesttesr ^ssifiU' m Oh U* BAR f \ T f , NOD RCfmBOB t V l R M V S. s>t| Lscsdi SiS x<,w Cw e Ad u ueme V i stihm Sixn Li^S^aiS Tea hm * 4U' SeiLi'^ tm s' cfp x D-- 3 l - i\ ' S'US D se Sxg' Vjji gi:? M itedsf hog msemmm ^hde t r mxs. m}: x $u*!< r i <,$ itx a<etoaix Oxe smo or dxmt 1ype; 1A Csmso: LIS *mo mV , ?T: daa * Released (am m|: t a,mm O ov U-Sioee Le): Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 140 of 145 ED 002061 00172724-00140 liselfeat Bsyeidgiies; Sam LOOA la ss sif i i f e if e ifeiafiad assd few ad IsfeiP hi isiissihSi: :s;'::i;::i isdssyssssssi si issw fedap fera ariafe w a t s prafess imsiaad; die ife'ihiedisftst rewddpg ia sSrftih a i & aimr. S: iS iftllstad shift: ss:sd:i s iss: seit: pfe ra siss Dafengs prapagaiad feafe, la fe tsilags- das i aaeftfe efesg ft sa r d lfe a fe fti atfefest f fe : afeag xsft. Ts adiiaga d ip tfe Efe tEifed fty Pawferriag I ihs asifeg meted Efts edg:l .Ssisara: Bftaaisiy ITD Sasily, s i ai.,. l 'Sl; 1.s ;:::;:;. St i IfeElfe Nh S Q gavAdfe Naesa; AAfe ftfeidifed. vfjfi L asafea: Ffeippiftaii OfeTiKsfe iyys; Da ilfe iit Ci}: Osa; Typs:; Ffea F ill Malaria!: liftptsfefefil Vifeass f i t i lesTra? i sferaife an; w : IcI T p & A, L..:;i\w:i yVS Q#si&j w'fTsiiTip.' & t g&m i (m . m;k Tlli'p Tn^vd DlstsirsC-Uin : C ssr^j m M M to.ilsigs it'! Sil ihidof^^l ipzs pH ig.iiliii'd &% 1 vM tt>xzy$?!\ m>kn%& b m m i the tybzte mim WM :m .. It A ; I;,s feck s^fivsl fe kilrp pafegtsii ispfemi it ida larpiftfedaiaai fee S sissy:::: agfealfej a f t dr lSIstfeS seifeaaal: s Sieefeagsrtsak, ifte ra t ife w ara, I 79 BAT. TYPS NOT NI fes Sre o KGOEMffeWE: S CAESE:; iM ksaaiaai Efe; 102: D fei/M fe Nasas: Pies da Sm L fe M I: Lesadaft: MSaaa Carasa, Basai CfeTsiSisgs Type; Os Beigisfesfi): 20 Basa Typa: Fid Malaria!; T Impafedpiftat Vafes (ft, sr: S f ti;:::;.S J fg f e f tr iS B r i S Dais: i 0 -0 2 ,-! IsifesiaiType: SA Class: E l Dfeaiky a i Tarife:; psfesftsad isu, fe ; Tailfe s Tfe'S Bfeee (fe ; 1siKft tfeayfp :fe : B /fe r 0;mg ter spillway laded dam isa- ma sail lfty feridiaiaa, caasfe feriara p i d:>Wftsfe sS-a:at:. Tsi!;afe iriferisrid. SfeSXSS ICLD Cs Si >' ! ' - m l, -< SfeS h i ' B M J I K W ' R I H ife BfeT safe, <g r u P - 1 Jfeifea Na,: !I2 ESsfttvIiisa: Nsfeift; WiSiiamapiMt Bferisst M iss L a a d : M fe C rife y , TEL USA feTaliiftgs Typs: iriresprisls Daft; HSiis hi ; aft: Fl Dam Type: Orna f e i M sfed!; ilftp e ilftfe ! shaft;;:s: is::..;. is.h I feSdii M ie m fe fe a Dla: : ft ft; hisid sai hys:s:i ift. Cssis; is s):s;sft:;y s T a d sip RJessad Isa, si: T fe rig s T f e e i Dlssfeea r ife I ftpid sah aasslpfssi: Ms dalasis praaidad. Sisars; M IS A s d a - h Fifes Dam/Mife Naifta: Agda iafeaJ Mida tfta iftp : Pag Crai, FL, USA OraTsllftgs Typs: psaapais Disa pSft!a): Dam Typa; Dim f ill Masara!; fe jX ife id ifta id V siiisiisi gsa, f e : l ssha: Ip fe rifessis; Data: M il Iftaidam Typa; ! A Cftsass; O .siiis;iis a i T a ilftps RsJfessif is s . ss1: Taspa TravaJ Dlsiaaas a); Iftldftpl, Dsissiy sfes Ditas Isagacd railisa la pailaslaa is a aaarl si ssiis Sid i:is i'Ssiis fiaar, S:s: iisilss daftftlft ssi Ssi i .iii ds Paarta S i; , ! S in s iis s i hi pp DaaFMise Naasa; Mais!! C tafead Mfta Lafeftp'ft; F i Msftfe PL, OSA ` s , p v <femsa Dife Flaigbs{;s)i D m Typa; Daai F!!! MasaridP ilPpftftafeftft! Y gfeft-(pp.. isisis h in h s S K s ;: Dala: D1&7 laasdaai Typa; !A Casas:: U > jft > i : t h !< sss; dhhhisiii Taildipa Taivai Diaiassa (a';;!: Iftilap.1: Basfelpiaa; D i Ptaach aad lateasa a i ppaapbatk rlay allaiaa laasdiad ia laadasaft a i da Eia EFfe, Ne ikrfe sis:s :1s ara is-ssisiyis. Taarae: Aeasdelai lish siiiiii: Nsis i l D infefe; Dama; Climax Mida Laeailoft: C afe Iftasdait CO USA ia/Ti:IM|s Typa: aiaalsas Dam h-sisjiS ; ssi ; Daia Typa: Dam Dili Malaria!: i, AD Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 141 of 145 ED 002061 00172724-00141 (isipiisteissoi Voten Co, o h.t otso Mites inst:,; A eis o : mm' i, , imm, " s I 1 eme I s,e rote "l ialty-, ee<v,ed et; a '! :\< 1 ois t - "l J f>< t, i .','Hl U'ateu DS'fripiss,t loii-siv do ses swxpum catisss teassaii fddl galRtas a i el&asd tes; ao adlsasoi riysr. d'oere mas an satteste ihsl: dtsitevsd radium aosirenujsoooa sa ihr rwst :sedad: togubslosy t ir : s>; te ri a i \ 4; V pW >>.< <<<oV N..; 4 OasiifN!ms V.; Amricain Cysmamkl Mine Leestea: Libsa, PL, R OrniTuibugs Typa: ohospluda OmuHeigiis (m): Dam Type: Dam RO Material: ImpSiUSsdsi'saai: Vdeimie: y.::.;. :e: e I dSss ! Dl:: ifdd (gadaut. Typa: !A Ciusm:. 1) Qimsdify of Itelfegs Rebweti feu, m): siling Ttavsi Disiaoas iij: Ibidyiti i!fsg:Npis;sn:: Release of bitgounded pMsispfssda otay siipss csiissd goliitsm of as adjaaass e;;k ami di Aides Rivst. No)nbi dsodls sta avalistes SuuFea: Asasdoiei Issli esl Nol 3 Dsni/Mfma Name: Amsdeiat Cyamsttid Afin imeabo; Smse-sisr, PL, USA CtePFslisp Typs: gygaarn Data Hemd; tes. tes Typ; Dais FF! bfldsifs!: teiposmdmpm. VoSutssiau, ni): taobfessi toiapeastiteai: Dots: IIRC pcisssl Typa; !A Casas: U Quantia of Tallings peakyssed (eu, m): Tabings Tssvs! Dlsbisteo fm); loNdete Dssanploa; Osai tescft Ssiiiiite mteieiof 10 inilJioo gaitei o seid waias and jeeltsdloo of dis Algfla Rivet. Mo srdw dataibi aie asaiMbM, Ssssas: Anecdote! IssMssi No.: I 'Psss/Mfiss Nam: Mmes Devetopitasf Mlles Locaiios: oNssiioos Sld. IddA niCal&gs 1vos: oissss Dais ifelgbt tmi Dam Typs: isei Pii Nfaiebsl:: Isipsssdmsss Vsbssis (sa, ta): Issklsii: lolprsisiisii paie; 8bMf lRIC IseklsaLTyps: IA Casas: ! il i O y 1 < t \ y y > * H> <0 Tallings Trasal DMsesee po ): ia o h s P osgripiioss f is dea lallsd Iksm pprapossd sauass, Taiisps releseed os::;i:o;j e ssssk eod sise :-o;o:o ssitssii 25 s ite ft: a essasvaiFdoivaslssam, Sssras: US AEC, W74 IssiebfN,: 5vl Psis/Msss Masae: Uses Casteds Mlles LoosOos: S'SoeSob CD, USA Os'sITaiiip Typ; Dass Heigbi (ns): Pass Typs: Dos: FIS iMideisl: iiop>eissdaiid Volions lau as): lasldas Isiiitestisp: Paie: S2Aiil-19dl laaidesi Type;: IA Cassa; pisaobt of Tsiitip Raieiaed. |sa. ffi): 'V : oe< ! o d o ; - tn iosMsss Dssseipflss;: Tbs daai Siisd Eoid ss-apoped ssosOA Mo darosgs ivas fepepei), as;! sSIseot isiaasod lid soi reseli eoe llowisA SissoiO:. 0.>::,O:',;0 D R 4 2.C. \ 215 Isaoisos .Na: ,0! DsooAHse :Mame: Csomiss Pial Psoopd Mlles reocaios; oalcilis CVsiTaibiga fyo;: esippia Dai Hsigid liai: Paie Type:. Pas; Pii Mfaeria!: T mpos:ate:af Voiaao Ido: ;;1 laaileM IsfsrsiaOH: ie.< t e r !s-.\L>D U a- \ -te;-e C p> asioy ei -'0,00'te pat, pi); aO,'OO V, t"5- '0es 'C i losoles'1 U<ae''ip'oo: t ,!>,,ao , i ; -0 ' 'i ; -a ' al,a; '.e, s-,, -p; S, p de -"! ii, t;p isj eei do <s . : ; Ssdsj;> f, 'eO-F. oo.', :od. ; ;t,s,t'v o -o" Rforse: Aae, :2lo :|sasi Ve,: i3b Dam/Mlies Naoie: Uadsoiied MAbrs LosaSsae SMtoii A&ia Orsfialais "Type: goM Dofil Hsgl'O(ai); 'sn Type: Paaa f Maias'isf: Isopoeadiaoef Viopoeoe (.ge, e-:; (oole:o;i: lo&soiaflaa: Dide: .FIV? !oeidsofT.yps: IA Maess:; U QeaeOlV oTTMKeAS Raiewii CvO' m): Taiiegs Iteval Dispose (ei); ioeimi Psaengdaat Mlswisoi M mode of a tlted oaiiogs diiiit No i-Oioo: domid, oio pioviieg, Soerss: Whits, 17 lasMeaS M,:: S42 PaiAMtlas Nome: lisidsoisieb 141 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 142 of 145 ED 002061 00172724-00142 teOuilmp Typt: Dem Hesjghl (m V 12 Pum Type: Vmn F ill rn d e l; R Imyum uim em V olu m e (um m): !m ;kkU lof'mm:md#m Dofm Imddem. Typu; I R C & U Qe&miD oDFeUImp Released (cm. m ); TmUugx T p u ! Dkumuu Im): ! ?uTdie u t DeserIpRusk Fm old m lim p dmTi m m ix^vin wltm e quarry bmuelmd *md wu-? subsequently m p k m d . The <ym%% Is noi: roportisl, Rim rom Lddo ?md Beuerv 19?d Das Type: Dam FIJI Maternal: teKMifesseai Valame {au, es); fee'IEes?s 1ator::aEa : B ; 13 laafefcssType'IB Cease: OT Casssediy eiTalaags kckesd |eu, ml: Tailings Travel Dlsrssic: i|; todskrai BasePip?)??? 'The Sv eEaedaaAl Eases eealibee?! eaessv<Flay iisspenuEiSSeple le ssAss;.. veil isscuasBs?led. eely decaai swetaess wife ee apeaCaameat sgEfsvisys, Bvertoppissg caused laites'c af Eve apper Earn red er re A a,sa, v a""T- - dssra, $Oiirt ' n i ''' - '* '! i t a k k & f Msm 2 w n lM lm 'Mixm: Akeo kirne Ime&om Puiul C um lbrt, TX.; USA Om TD H u p T yp t' fmmm Dum H o p lu (mV IH Deos 'Typer Dam F ill Material: Im fm m uim om V m (eu. mV 4>5dOsiFXI: Ip e ld u iii toRmmifmre Dom;: RV-CD-H l 4 ImVdeptType::' l Cmem: pMntiy ufTeilbps ITelesued (me ?n}: >< S>U ' 3K> >%i D i %.v -, ta krn klo m `R m e rp f.k m Ceese o f the fedure k u o i m puim d, Relee&ed mmeRel mm; co.esiued m Hewusmesrn Impemmi meut, Semrse: MRS A Is f\i<s as h*, , -. i DsesFMsue kease: Paldassdd! Mi.fi Lormtk:m: IK , PSA Q r s s k ill:m Typ:i eaal Dam Nee (m): D?eaTvpa: Dem f ill m m salasees VaiesAe Ice, sp|: Is?deal: lafsspasBeie? Dais: acidestType: 18 C'aese: T Qeusssdy of Tailing! elagaad das, ail: TAaes Treed: DisAsaee {as): ladEeae CesEsdglls: An ebsBsdlal e r A sissesy sipassadasasB? saga dayelseil a osiertapplsg sAesaa sieav -mim, N:o svei deSide areaeadefele, Seaeae:: i:A;aae;;: s-i sA 1974 AM TYPE: NOT R ETO iO T i q o e k t r w & II! CAUSE- 0 DABI T V : BOT H d fP k lls k IN C ISEN T T YCE; l i CASJSIa l la s:Sds?ai Nsa; JB Dagkklla Nslrg: Ntsssge N il Lecadsne Oslle OresTaiMaga Type: sasppes1 Idem BAgisi (m): Dsar. 'Type: pas? Fill |s??eEa|: laptiiidsTseai Valease ca. ???): I:ael?4es?l tafamssiiaa? iptsle:: l !?SS kseldt?dfype: IB Caese T Qaisaasy e:iTadlsgs kaieE :|ea, s?s): Tvlkapa Ts-es-el pesa;::sea |?s?p fswldeal Pesarlpd aa? The rsas-aellay ahasteaeE siasss assd ?? dectai ;s?cfgae bal m abeasloasaeal spdks5ay; SAvi; g P i ii SVIa , XJS! S?l d?S6 lb V&s?E'aa8l iiseadias N? ad DisriPklkse Nease; D k k Idae Msae Lixask: Clessr Caeeh Coasay, CO., USA Dey Fadleae: Typsei sail'd Dm Pesglft (m); i.7s;:a Typa* P??s?sFill a-essiiaessi: sapsaaaeliae?. Vlums? ferea aV iacsiri? Is:sipe???eds?:; Dase:::S4-dkSFM laeideaCType: IB Caase: Qssa??Esyef Tsdlls?ga Eeki?ai (es?. a?1: Tlkag Teaval Pkiace a?}; ladders!: Pessealfida??: Na dmade peav?d:sd. Saaree: NIHSA ebej'ss , >pa.i 5 er A'.usuy atweasflvs'a thA?apd : 5assn s j t r :' brau' ?'l k a i ;V> Sss S a e s d e - r J : N u ?.<a Da a Mas.' Pkas5 kac s< bda is'us 5ae.as-.e ., , Si ieias. C': e i.:spA. laU'b*, h?'. -'a ' i <<a M a r . a r 1 s i - a i ! :;. a M " e I e?a.?Ss'a I hile 1?- I vsba '*-' s ,ss>- sf s s's-- k sba. A a- ';deba'a-s s Pa-r kaphs T :'s - s i - -s . ses I si! V s;rs:ssl: I .ape.ua.slareK,. I .?."; a " :s. a. s | S-iesiP-ih kSiss sss-iSB'SSS Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 143 of 145 ED 002061 00172724-00143 LEs- e i -SPD la< id' ' l>i .rU ) slip, .,3 ' ,vi ij\ Ss'i-'.i "v s t,, ssa) -e : jj' f >" I h -mm x* .''it lasc-asa-sr: Bmisai'spltiMS! '< < -3sain in iS- t Msane MaDR ddeisf. Ems JO Dasjsg/iCsaisss Hssarses: Osiste % ! Mine: islasssa Lasesaka:: Qiadlsksswk,: CCS, USA seDa!)siege Tasyas geld D Belgisi: Cm): 32 C to Typ: Usasse Osi) Massasrmia ImpsssmidsrseM Vstkee {rae, m): h m m lw 'm & tw m Dade; II-O IM E M lossalsisesType: !B Cimase; ii Ctsaarky sri Telile ge Iteteseard fop,.}; Tisslsagas Tseeel Dissstgesss(m): M ii^ M fM i fip iiiM t Mo deedb provided, Janri.i: M iiS A 4 V |im 3 0 ,, - v y ) K l N > f< T O i S g i 3 ? ; g \ l T I F I ; J e S M v > gs os,, :> * Cose sifs. 'ha.-. Cn*.enii am M is i . \ p . < De:. U D I T . K \ s m-s>, . >i ; IDss; s,fiit> , " 'B Sms 31; v R e l i a i Vms-o d V V- io," M io n fii' 1- D in* - n ssA ii. i'i l <.3 3.(3i`! s.Oios Pam Issueassa ,'- .m 4 L .sim 1*/ ss.f t a* 3>a s . P m<rr-\ a \ as.i Di-S'gii i.' Vni U *1Sl.i'V ' ii listsdte IH realardassi T; i' a i n ' .i <i , H,i >,o ' 3' . e i .3 3 s,(i..'33ipe.'ii.'e eese-P-rpm ois :,,i SO',V 3'..-im,!,. il lids.. sa! '.Si-r .;..'.-s>,s..fi: ' R.<py mm mare- es U sert Ae<<mxia;ei A S, 3s-.'i a'K, tu '.'fi t'r i I, s ,y;';; -. t i' - .gare feeds-, i m s.iesv .seetsog 3'3~ t . . ;.n . s s 3 i.i sn ss >3 O s e C 's . L w . l . i s a t s V m Siit r. t4 2, s<3.. - D h s s... J In in M A lT M \ m T ilg i M in H ) sTCiWo! rt i'f \ (i : Stnti < f *\ t', AS i A Ai l't / t>^' i" i San 1 . s >5<- i ; s * 1KJ'aU* Us. il -sees!ar 3 - s USA *,-5 i fii 3is ; ',3, sape! PI ees.l Tr pee - i 4ti j-; . s0 ,s } sscssissasS htiiw m sasssiass ,V'fi ' R-'1 iOi,.ii>e .a; 2 a lias O Quaatity of TssiOags Retfiisiisrdfern srs): Tasildigs Tetvei BasasseIsrs);: I n s s s l s . s . f I s s n e i - i ; ; ; . , - . : > 11m sisma asssissvesesppasad, feet rso Omaeli ofissinsM ssrssl salissage mera sassi seiemsed:: The Sasse wma pisssaed: saasaT; ia sarviae wsda srsissesr fepesiai, S a o r a e : V irg k tl D ep s, M lpeas, ivlireads sssas! Eaaergy, D ia . kisssssa; Lassas): Ressi seeaalers ;:-sDva' R',a i 24 Bsssm/sLfea Nssassa: Utaia Csapsamsaaaio Dime loseopiasa; Rlvaspasa, W , :SR ssIsissS'i'sisIsiasssss. 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EPA 18cv3472 NDCA Tier 10 Attachment E Page 144 of 145 ED 002061 00172724-00144 Sierra Club v. EPA 18cv3472 NDCA Tier 10 Attachment E Page 145 of 145 ED 002061 00172724-00145