Document 1GoRr6r3nEKvveVDN4pjEenE

ri PUBLIC SERVICE COMPANY OF COLORADO ARAPAHOE STEAM ELECTRIC STATION 1950-51-88,000 KW INSTALLATION 1 951 -44,000 K W EXTENSION FINAL CONSTRUCTION REPORTS 1950-51 EBASCO SERVICES INCORPORATED NEW YORK WAD01931 A F - 7 5a WAD01933 WAD01934 Ij ARAPAHOE STEAM ELECTRIC STATION 1950-51-88,000 KW INSTALLATION 1951-44,000 KW EXTENSION FINAL CONSTRUCTION REPORTS / ll BUILT FOR PUBLIC SERVICE COMPANY OF COLORADO 1949-1951 Prepared By Approved By WM. 1. M1LBURN Resident Engineer B. a. SNOW Superintendent EBASCO SERVICES INCORPORATED MARCH 1953 WAD01935 WAD01936 WAD01937 r i oo u os 2>f--f*i D h OZ> / 0u. 1 h<> < oX H 2< 2 C P <Q 2 < ON 111 a3 HU tu H- yC. i < HvU>l 2S 12 K CL 3 05 2 D WAD01939 W' I I ) I WAD01940 L ooking Southeast at C learing for Railroad Spur Fil l U nits 1-2 Progress Picture 12 A ug. 17, 1948 WAD01941 TD riving Piles for Circulating W ater unnels A long South Side of Building Site U nits 1-2 Progress Picture 30 Feb. 4, 1949 WAD01942 TC irculating W ater unnels A long South Side oe Bu ild in g Site U nits 1-2 Progress Picture 38A A pril 4, 1949 WAD01943 TCirculating W ater unnels A long South Side of Bu ild in g Site A lso Pilin g for B u ild in g and Boilers U nits 1-2 Progress Picture 44 M ay 9, 1949 WAD01944 TCirculating W atlr unnlls U nits 1-2 Progrtss Pioturl 48 M ay 9, 1949 WAD01945 T emporary Construction Buildings U nits 1-2 Progress Picture 56 J uly 5,v 1949 WAD01946 T TC ir c u latin g W ater unnels an d Cooling ower Basin U nits 1-2 Progress Picture 59 J u ly 5, 1949  y &. JJ O--' U* a Ja<ot _>*i D < Qd QW Z Cti < Vi zo aDHU. ,. HS< <Sv/ij i8 U, CL. O S^ Qr?J ^ co m5 Hh 2 WAD01947 Os '' Os z p-4 o p < ad zD D< 0 u. ITS 1* so o u. U t/i 06 z '3 0H U < > co < co u UJ X 06 w8 Q a: < !h I cs U1 f5g C/3 z O WAD01948 WAD01949 T TCirculating W ater unnels and Cooling ower U nits 1-2 Progress Picture 70 Sept. 1, 1949 WAD01950 Stack No. 1 U nits 1-2 Progress Picture 72 Sept. 1, 1949 4 WAD01951 U nits 1-2 Progress Picture 74 Se p t. 1, 1949 WAD01952 Boiler N o. 1 U nits 1-2 Progress Picture 91 Nov. 1, 1949 WAD01953 A erial V iew L ooking Northwest U nits 1-2 Progress Picture 94 Nov. 16, 1949 WAD01954 Switchyard Foundations U nits 1-2 Progress Picture 95 D ec. 2, 1949 WAD01955 Station Building L ooking N orthwest U nits 1-2 Progress Picture 97 D ec. 2, 1949 WAD01956 Boiler No. 2 U nits 1-2 Progress Picture 106 WAD01957 Circulating W ater Pump Chamber U nits 1-2 Progress Picture 108 Ja n . 10, 1050 WAD01958 TCir c u latin g W ater Pum p Chamber and u n n e l WAD01959 A erial V iew L ooking Northwest U nits 1-2 Progress Picture 127 M arch 4, 1950 4 WAD01960 iOonn U) 2D2 >- < H u*u vo <H 2 u ILi QDHCJ H < C/3 c/3 a& 2 H < 8C cx DUQ CM U OHO 2 D WAD01961 WAD01962 Boiler N o. 1 U nits 1-2 Progress Picture 137 M ay 1, 1950 WAD01963 TCoal Crusher House and rack Hopper U nits 1-2 Progress Picture 143 A ug. 1, 1950 WAD01964 TCirculating W ater Pump Chamber and D ischarge unnel U nits 1-2 Progress Picture 144 A ug. 1, 1950 WAD01965 Boiler No. 2 U nits 1 -2 ' Progress Picture 147 A ug. 1, 1950 i WAD01966 Building lor Circulating and Service W ater Pumps. TW ater reating Equipment and Gas M etering U nits 1-2 Progress Picture 154 Sept. 1, 1950 WAD01967 Coal H an d lin g System U nits 1-2 Progress Picture 159 Oct 2. 1950 WAD01968 U nits 1-2 Progress Picture 163 Nov. 3. 1950 WAD01969 A erial V iew L ooking Southeast U nits 1-2 Progress Picture 172 D ec. 11, 1950 WAD01970 WAD01971 U nits 1-2 Progress Picture 185 A pril 2, 1951 j Jj t *< :\ .( M in os > < s o<O oooo a! -- uu uas saw2<s czu 2 < HDU ttUaooJ* aaS. 2 D WAD01972 WAD01973 TCooling ower Connecting Foot Bridge U nits 1-2 Progress Picture 189 M ay 3, 1952 WAD01974 Building and Boiler Foundation Piles U n it 3 Progress Picture 2 March 31, 1950 WAD01975 Building and Boiler Foundations also Circulating TW ater unnels U n it 3 Progress Picture 6 A ug. 1, 1950 WAD01976 TCirculating W atkr u n n l i.s WAD01977 Building Structural Steel U n it 3 Progress Picture 19 Nov. 3, 1952 WAD01978 Unit 3 TCooling ower Basin Progress Picture 21 Nov. 3, 1950 WAD01980 Boiler N o. 3 U n it 3 Progress Picture 35 A pril 2, 1951 WAD01981 Stack N o. 2 and W arehouse Foundation U n it 3 Progress Picture 42 A pr il 27, 1951 WAD01982 General V iew L ooking East U n it 3 Progress Picture 66 July 31, 1951 4 WAD01983 Pump A rea U n it 3 Progress Picture 75 September 1, 1951 Turbine Generator Unit 3 Progress Picture 80 October 1, 1951 U n it 3 Progress Picture in ON H C/5 <UtJ HDOs CWn S Ui 00 zS S00 * 8 3int j<cd UZi ui a i WAD01985 WAD01986 D eaerator and H eater Floor U n it 3 Progress Picture 85 November 2, 1951 Unit 3 Turbine Generator Progress Picture 86 November 2, 1951 WAD01987 General V iew L ooking W est o1A\ (A cwtf a. ro H Z D WAD01988 WAD01989 General V iew L ooking N orth-west U n it 3 Progress Picture 90 N ovember 30, 1951 lo/N\ CN UOUi S5 S Oz w> uI UJ UJ (N eri os CO u QZ< eDHi a-t Cl, do M B H Z D WAD01990 mOc os U(QJ 0L0 o5 6 5uj >O 2 ousj < -O0v- UJ OS Z h DHU < Dry5i co was u8 as CL ro H z D WAD01991 4 in O' t z WAD01992 Boiler Feedwater Piping WAD01993 TCoal Piping and Feeders at urbine L evel WAD01994 T urbine Room U n it 3 Progress Picture 98 N ovember 30, 1951 WAD01995 SECTION I PROJECT OUTLINE WAD01996 1 4 SECTION I PROJECT OUTLINE WAD01997 B PUBLIC SERVICE COMPANY OF COLORADO ARAPAHOE^STFAM ELECTRIC STATION 1950-51 B8.000 KVJ TNSTA1 LATIDN 1951 44.000 K1' EXTFNSION PROJF.CT OUTLINE SECTION I - GENERAL Since the start of world '"ar II the Rocky Mountain Area has grown rapidly onulation and industrial capacity. Colorado and especially Denver, larg^t population center of the area, are the leading examples of this trend. ^arly in 194" Public Service Company of Colorado, serving Colorado and Den ver decided to expand its facilities with a new steam-electric station. A site on South Platte River, on the southern Denver city limits, has rea for future expansion, adequate coal storage, makeup to supply cooling toners. River flow is not large enough to support a once-through cooling system for Arapahoe Station. Though present design contemplates maximum capacity of 200,000 kw, the site can accommodate about 300,000 kw. Early in 1948 design work started on two 40,000-kw preferred-standard units to be served by single boilers with no cross-connection. Initial steam conditions of 850 psig and 900 F were chosen using high-moisture sub-bitum inous coal as fuel with low-cost natural gas as a supplementary fuel when available. The third 40,000 kw preferred-standard unit was authorized in 1949 for completion in 1951. SECTION IT - SITE DEVELOPMENT The plant site extends along the South Platte River at the southern city limits of Denver. South Platte River Drive paralleling the river bank forms two sides of the property. The west side is bounded by a branch of the Col orado and Southern Railroad which serves the Plant area. The north end of the property connects to subdivided land in which full city blocks are used for truck gardening at the present time. Included in the area is a kidney shaped pond formed by gravel excava tion at sometime past. A second gravel pit was filled in and graded for coal storage. The pond is kept at level by inflow of ground water which usually follows river level. The main plant is situated about 400 feet north of South Platte River Drive and faces south. Immediately in front of the plant is the switchyard and immediately behind the plant is the coal storage area. The cooling tow ers are located along the edge of the gravel pit running generally in north- south direction. , Coal dead storage tracks are located to the west of the building paral leling c&S tracks. Live coal tracks and unloading hoppers are to the north of the main building. WAD01998 See Plot Plan F-86800 for cqjnplete site layout. SECTION ITT - STATION LAYOUT Station layout features compactness and economy. Outdoor-type steam erators have only upper area around drum and burners and lower area around 9e" h0ppers housed. Building has brick front on south and east walls for 3Sehitectural appearance, insulated steel panels for other walls. Placing a[l heavy rotating equipment, like boiler feed pumps, mills, draft fans on 3 ground level, held down structural-steel costs. Eliminating a subbasement reduced excavation and foundation costs. Location of the central control room for first two units minimizes length of conduit and control-piping runs to boilers and turbines. Each ir of units will have individual control rooms, but for the present the generator controls for unit 3 are housed in control room 1-2. Only the two bunker bays separate the boilers from the turbines. Deaerators, heat ers and evaporators for two units stand above the control rooms. This eliminates the usual auxiliary bay. A 100-ton turbine-room crane can handle larger future unit parts. The turbine generators are located lengthwise with steam ends of each pair facing. The height of the turbine pedestal was held to 25 ft, a min imum for maintaining condenser hotwells above basement floor level to avoid a condenser pit. The steam generators are separated by three 24 feet bays in which are located the condensate storage tanks, chemical feeding equipment, air com pressors and machine shop on the ground floor and the switchgear room on the operating floor. The office and service area is contained on two floors at the east or permanent end of .the building. Facilities include a main lobby and recep tion desk, chiefs office, assistant chiefs office, conference room and first aid room on the ground floor, with laboratory, results office and locker room with showers etc. on the second floor. For complete detail arrangement see general arrangement drawings F-1C0234, F-100235, and F-100236. SECTION TV - ARCHITECTURAL AND STRUCTURAL FEATURES Building columns, boiler columns, stack and turbine pedestal are sup ported by concrete pile clusters driven to an average depth of 30 feet. Architectural treatment of the plant is largely an expression of vol1 ume requirements of major mechanical and electrical equipment. The natural surroundings were considered in selection of sand colored brick for the tur bine room and office building at permanent end. The remainder of the plant utilizes steel insulated panel for low cost and ruggedness. 2 WAD01999 WAD02000 jhe turbine room interior is treated as a continuous room for the three This will be continued for future units-t The auxiliary area is open t'nlt}1e turbine room as are the bunker shells. The coal handling equipment t0hive the b-u--n--k-e--r--s is com1--p--l-e--t-e--lJy enclosed by steel panel partitions to keep D dust nuisance to a minimum. the The control rooms are enclosed by tile walls ?nd glass. Windows are oW(jded for view of the turbine room and boiler fronts. Egg crate light- Pr ing is Since included for the control rooms the heaters and evaporators are as well located as asphalt tile flooring. immediately above the control rooms a membrane waterproofing covers the ceiling slabs and no piping, duct- 0r conduit is allowed to pass through these areas. ing the switchgear room is enclosed by tile and steel paneling. No seprate battery room is provided for station d-c supply and the batteries are located in an open area of the switchgear room. The steam generators are mostly outdoors. Enclosure is provided at the around level for the ash handling equipment and at the firing aisle and drum level for operating convenience. These enclosures are constructed of insu lated steel panel. Roof construction features precast concrete slab covered by bonded roof ing. This type of construction is substantially cheaper than poured-in-place slab. Concrete flooring is finished with grey hardener for appearance and durability. Structurally of interest is the bunker construction. Bunkers are ar ranged in groups of four and are of the unreinforced steel silo type. This type was chosen because it offered less expensive construction and better coal flowing characteristics with less chance of coal hanging in the bunker. SECTION V - STEAM GENERATING UNITS Each unit is equipped with one Babcock & wilcox Special Stirling type 3-drum steam generator capable of producing continuously 450,000 lb per hour of 905 F, 925 psig steam or 475,000 lb per hour for a four hour peak period. Steam generators are fired vertically through roof tubes with Colorado pul verized sub-bituminous coal or natural gas or the two in combination. Burners Eight burners are arranged across the top of the furnace near the front water wall. Coal and gas burners are of the intertube type. Automatic gas lighting is provided. furnace Particular attention was given to furnace design to obtain the features 3 WAD02001 red for burning the lew gradanof coal available. Furnace is completely requl c00ied and contains^7,794 sq ft of surface. Furnace volume is 491,900 watft and heat release is held to 13,500 Btu/cu ft. cu rheater The superheater consists of 19,800 sq ft of surface and is of the pendant horizontal continuous tube type. Steam temperature control is by two a(ld _erators located in the bottom drum. Bailey Meter control equipment is attj ncj maintains 905 F at superheater outlet within plus or minus 10 F with ^control range from 285,000 lb/hr to 450,000 lb/hr. jruB5 The boiler is equipped with three drums, uptake steam - 36", downtake steam - 60" and mud drum - 54". All drums and boiler parts are designed for a pressure of 1050 psig. The downtake steam drum includes washers, separ ators and scrubbers. Feedwater is introduced directly into the downtake drum as no economizer is included. Heaters The air preheaters are of the tubular type with five air passes. The tubes are divided into two sections, 5465-2" - 14 Bwg at the hot end and 1813-3-1/4" - 11 Bwg at the cold end. The short heavy tubes at the cold end offer better corrosion resistance and are more easily replaceable. The total heating surface of the air heater is 118,370 sq ft. A recirculation duct is provided from the hot end to the forced draft fan inlets to raise incoming air temperature as a deterrent to condensation and subsequent corrosion. Hust. Collectors Each boiler is equipped with an Aerotec mechanical dust collector be tween the Air Heater.and Induced Draft Fans. Space has been provided for a future electrostatic collector if the surrounding area develops to a point where further consideration of the dust problem is necessary. Draft Fans Each boiler is equipped with two forced draft fans rated at 100,000 cfm at 13.8 in wa each driven by a 300 hp, 1200 rpm motor and two induced draft fans rated at 173,500 cfm at 12.8 in wa each driven by a 700 hp, 800 rpm motor. All fans are constant speed motor driven with inlet vane and outlet damper control. All fans are equipped with sleeve type bearings. Fans are manufactured by B F Sturtevent Co. Soot Blowers The Diamond soot blowing system is air blowing and air powered. A Com plete automatic sequential air control system is provided. Each boiler is equipped with 18 rotary blowers, 4 long retractable blowers and 2 straight line air heater cleaners. Air supply for all boilers is provided by three 4 WAD02002 thin91n two stage air compressors each rated for 504 cfm at 5280 ft alti- rde a 750 'receiver cu ft are primary used in *500 psig receiver and a 100 conjunction with the system. cu ft secondary 365 jSiO SECTION VI - ASH AND DUST HANDf.ING Xhe ash and dust handling systems are provided by the United Conveyor Corporation. The wet bottom ash system will convey at a rate of 50 tons per hour and the dry dust system at 15 tons per hour. Xhe ash hoppers are of the flooded type sealed at the lower water wall headers by water troughs. A continuous overflow from the seals to the hopper intains low lining temperature above hopper water levels prolonging lining life. Ash is discharged through one gate at the end of each hopper. This ate is hydraulically operated by a three way valve immediately adjacent to a sight window in the hopper front. The ash then discharges through a 3 hp crusher to a Jetpulsion Pump. The Jetpulsion Pump is a water jet device fed by 125 psig water from two 1,000 gpm vertical ash water pumps located in the gravel pit pond. These pumps also feed the jetting nozzles in the ash hoppers as well as the fly ash system. The Jetpulsion Pump discharges ash and water to the gravel pit through an 8" cast iron pipe line. The gravel pit is divided into two parts by an earth causeway. The north side receives ash from the plant and the south side provides sluicing water to the plant. The pit should provide ash storage for many years. 'hen it does fill up ash can be clam shelled into rail cars for transporta tion to remote disposal. All three boilers discharge into a common line to the gravel pit. The fly ash system is of the dry type. Vacuum is created by two water jet Hydroveyors discharging their mixture of water air and ash to air separ ators located on the east side of Boilers No. 1 & 3. One hydroveyor serves boilers 162 and the second serves boiler 3 and future 4. The air separa tors discharge by gravity into the main 8" ash line to the gravel pit. Each boiler has four rear pass hoppers, four air heater hoppers and four dust collector hoppers. The dust collector hoppers are equipped with automatic air operated dust intake gates actuated from a sequential control system. The control system is incorporated in ash control panels located on the ground floor between boiler 1 and 2 and between boiler 3 and future 4. These panels also mount the control switches for the ash water pumps as well as vacuum re corders for each Hydroveyor. One 250 ft by 11 ft 10 concrete brick lined self supporting stack is pro vided for Boilers 1 and 2. Boiler 3 and future 4 are provided with a 250 ft ^ id ft Id stack of the same construction. Each stack is equipped with a tiUst hopper and intake connected to the boiler collection system. 5 WAD02003 SE6TI0N VII - PULVERIZERS Coal for Boilers 1 and 3 is pulverized in two sets of four Babcock and ix gall Mills each equipped with a separately driven primary air fan. [Teh mill *s c*r^ven by a 100 hp motor and each primary air fan by a 125 hp motor* Each mill is designed for a capacity of 16,800 lb per hour when deliver. a product of which 72 per cent will pass through a 200 mesh screen, 89 r cent through a 100 mesh screen and 98 per cent through a 50 mesh screen, i^der the above conditions power input to mill and primary air fan will not exceed 17.4 kw per ton pulverized. Control of the mill is accomplished by an air damper between primary air fan and pulverizer actuated by a Bailey drive from the combustion con trol system. The table type feeders mounted on the operating floor are con trolled by two speed positions and by a gate on the table. The gate is actu ated by a Bailey Drive. Boiler 2 is equipped with four Combustion Engineering Raymond Bowl type pulverizers and exhausters. Mill and exhauster are driven by a 250 hp motor. Each bowl mill is designed for 20,700 lb per hour when delivering a prod uct of which 70% will pass through a 200 mesh screen and 98% through a 50 mesh screen. Under these conditions total power to mill and exhauster will not ex ceed 17.2 kw per ton. The mill is controlled by a damper in the exhauster discharge from the combustion control system. The star type feeders are equipped with Reeves Variable Speed Drives for feed control by a Bailey Drive. Feeders are lo cated in the operating floor. Mill temperatures for all mills are controlled manually by tempering dampers located at. the rear of each boiler. These dampers admit cold air directly from the F D fan discharge into the main stream of primary air going to the mills from air heater outlet. A pyrites disposal system is provided for each set of four mills. This system is of the dry type with vacuum created by hydraulic exhauster nozzles discharging into the respective boiler hoppers. All piping from the mills is run in trenches covered with checker plate. SECTION VIII - TURBINE GENERATOR UNITS The Turbine-Generators for Units 1 and 3 are General Electric 40,000/ 44,000 kw preferred standard, 3600 rpm, 20 stage tandem compound units de signed for throttle steam conditions of 850 psig and 900 F and for an exhaust pressure of 1-1/2 in. mercury absolute. Turbines are designed for five stage feedwater bleed heating. The generators are hydrogen cooled rated at 47,058 kva with .5 lb hydrogen at 0.85 power factor and 13,600 volts 60 cycle with a 0*8 short circuit ratio. Generator maximum capacity at 15 psig hydrogen is 54,117 kva. 6 WAD02004 dumber 2 unit is a V'estinghouse 40,000/44,000 kw preferred-standard, n rpm. 33 stage tandem compound unit designed for throttle steam conditions psig anc* ^-)0 F and for an exhaust pressure of 1-1/2 in. mercury, is provided for 5 bleed feedwater heating. The generator is hydrogen "urieCl rated at 47,058 kva with .5 lb hydrogen at .85 power factor and 13,800 Clts, 60 cycle with a 0.8 short circuit ratio. Maximum generator capacity VJ)1 15 lb hydrogen pressure is 54,117 kva. ill three units are equipped with direct connected exciters rated at njQ volts. 7he turbine lube oil systems are supplemented with Bowser continuous by-pass filtering systems including a batch oil storage tank for each pair 0f units. A 100 ton crane is provided to handle the largest parts of turbine gen erators. This crane will handle the largest parts of future larger machines. SECTION IX - STEAM CYCLE Flow diagrams F-86808, F-86851 and F-100206 and Heat Balance diagrams -86807 and E-86850 show schematically the cycle arrangement with numerical values, flow rates and line sizes. At 44,000 kw load and design conditions the station heat rate is 12,510 Btu/kw hr when burning coal at 84% boiler efficiency. Steam is delivered from the boiler to the turbine through 12" sch 100 1% chrome 1/2% moly pipe with no crossovers between units. After partial ex pansion through the turbine steam is bled at five points to four closed feedwater heaters, deaerating heater and evaporator. The three top heaters are vertical head up, two pass without drain coolers. The low pressure heater is horizontal and mounted in the condenser neck to save space and maintain a min imum of piping. All heaters are supplied by Struthers '"ells Company. The two top heaters are drained to a flash tank where the flash is carried to the de aerator by two high pressure drain pumps, one standby. The two low pressure heaters also drain to a flash tank where flash is directed to the L P heater shell and condensate is pumped into the main condensate pump discharge by two low pressure heater drip pumps, one standby. The evaporator coil drains to the high pressure flash tank. The condensers are two pass 30,000 sq ft arranged with divided water box. They are set in conventional manner across the axis of the turbine. The con densers for Units 1 and 2 are of Allis-Chalmers Mfg. "estinghouse supplied Unit 2 condenser. Two 700 gpm 350 ft TDH vertical condensate pumps each driven by a vertical 100 hp motor, serve each condenser hotwell. One pump is required at full load with one pump as standby. Manual recirculation is employed back to condenser hotwell during start up. From the condensate pump the condensate passes in turn through the steam 7 WAD02005 4 r ejector, through the low pressure and intermediate low pressure heatjel al tlie jeaerator vent condenser. The deaerator is of the horizontal tray etS Manufactured by !,orthington Corporation rated at 4CO,COO lb per hour iy?e " o C05 cc oxygen guarantee and fitted with a horizontal 125,000 lb storr.ith a . ' age tank. jeaerator level is maintained during system changes by a high level float , _p3ss condensate to storage from condensate pump discharge and by a low l i float to admit dead storage to the condenser. An automatic o---v--e-r^flow is leVvided to waste if deaerator level goes beyond cojintrol. '"hree Byron Jackson Boiler Feed Fumps per unit, one of which is a spare, . rated 265,000 lb per hour at 1160 psig and driven by a 600 hp motor take efc-r SUction from the deaerator storage tank and discharge through the two 1,1 h pressure heaters to the boiler drum. Fain boiler feed pipe is carbon 111eel 8" sch 160. The two high pressure heaters are close coupled on the feedl5\3t1or side and are by-passed automatically on high water in either heater. Condensate storage is provided in vertical 11,000 gallon storage tanks located at the ground level, one per unit. Each pair of units has two conjensate transfer pumps for handling large condensate changes. SECTION X - CIRCULATING WATER SYSTEM Since the South Platte does not supply sufficient flow for a once through circulating water system cooling towers are supplied. The cooling towers are located along the west edge of the gravel pit over concrete basins. The cooling tower for Units 1 and 2 is of I.larley Company manufacture and is an eight cell induced draft, double flow type with overall size 63' x 193' x 39', capacity 62,000 gpm, 63 F water leaving tower 104.3 F to tower and 20 F approach to a design wet bulb of 63 F. Eight 60 hp motors drive the aluminum bladed fans through gear heads. The tower for Unit 3 is based on same design conditions but at half the capacity or 31,000 gpm with four cells. 'Jater flows by gravity from tower basin through cast in place concrete tunnel designed for four units to the pump intake located near the station. The pumps are housed in a brick building which also houses chemical treat ment equipment, service water pumps and chlorine storage. The main circulating pumps, one per unit, are vertical Allis-Chalmers mixed flow design, each sized for 31,000 gpm against a TJH of 75 ft and driven by an Allis Chalmers 600 hp vertical motor. Chlorine and acid are injected into the system immediately ahead of pump suction. The acid system, supplied by Fermutit, automatically maintains pH by ejecting continuously controlled amounts of sulphuric acid. A continuous sample is taken to the electrode of a Leeds Northrup pH controller-re corder which automatically adjusts the stroke of two Hilton Roy proportionln9 pumps feeding concentrated sulphuric acid to a mixing chamber. In the Ur\ WAD02006 lead lin through indicate ed mixing stainless a pH oi chamber pipe to about 8.0 the the is acid mixes with service water and circulating water tunnel. Design necessary for best results. is piped ca1cu1 atiou$ One 10,000 gallon storage tank for the strong acid is set by a rail sidalongside the pump house. Emergency shower and eyewash fountain are prollKJ , for personnel protection when handling acid. The acid pumps and conlKn r are located in a separately enclosed room of the pump house. I r 011*'L jhe chlorine system supplied by '.'allace 6 Tiernan Company is of the ermittent automatic desliming type. The main chlorinator and controls 11 in the pump house enclosed in a separate room. A chlorine storage room 3,th a capacity of 20 one ton cylinders completes the pump house. A two ton lv!; crane is furnished for unloading cylinders from the cars and a two ton 'raveling hoist handles the cylinders in the storage room. The three main circulators discharge through automatic butterfly valves t0 a common cast in place concrete tunnel feeding the three condensers in parallel* A temporary end is provided for extension to future Unit 4. Each condenser is valved with four 30" bevel gear operated gate valves for shutdown purposes. Condenser tubes are drawn out through large openings closed by overhead rolling doors in the building front wall. Circulating water is piped from each condenser to a common return tun nel paralleling the inlet tunnel. The return tunnel runs to the cooling towers paralleling their west sides. The top of the tunnel is maintained at grade so it can be used as a walkway during winter months. An individual valved riser serves each tower cell. Each riser is equipped with a measuring orifice so water to each cell can be apportioned. Towers for Unit 4 can be located at the end of the Unit 3 tower. Any expansion beyond this will re quire tower location across the gravel pit or on the east side. SECTION XI - COA1. HAND!.TNG SYSTEM The Coal Handling System is designed to handle run of the mine western sub-bituminous coal at a rate of 300 tons per hour. All component parts may be speeded up by drive changes to handle 600 tons per hour in the future should station capacity demand it. For general arrangement of the system see drawing F-86804. The coal to be handled ha the following proximate and ultimate analysis: Proximate Analysis Ultimate , nalvsis Moisture Volatile matter Fixed carbon As h Total 24.0% 28.8% 42.0% 5.0% 100.0% Carbon Hydrogen Oxygen Nitrogen Sulphur Ash 55.24% 3.08% 10.78% 1.14% 0.61% 5.15% 9 WAD02007 ^oI-teiung temperature - 2090 F Asl, fluid temperature - 2220 F Grindability (Hardgrove) 45 [Jeating value (high) 9280 Btu Ultimate possible plant capacity indicates that a car dumper could be sary t0 unload the required coal tonnage. Therefore receiving layout '^ovides space for a car dumper pit. For the present, however, no car dumper Pr takeout is provided and side and bottom dump cars are emptied by hand over !r f0ur track hoppers arranged three in a line on one track and one on a parallel track. Two of the hoppers are equipped with apron feeders and two with recipocating plate feeders. All feed to 42 inch inclined conveyor No. 2 to the crusher house. The head pulley of No. 2 belt is magnetic to take-out tramp iron before coal reaches the crusher. From No. 2 belt coal may be directed at operators choice either to No. 5 storage belt at right angles to No. 2 or through the crusher to the vibrating screen. No. 5 runsout either side of the crusher house to dump coal on the storage pile. Coal is reclaimed to the track hoppers by a bulldozer. No. 5 belt is 36 inch and the galley is uncovered. The crusher isof Pennsylvania Crusher Company manufacture sized for 200 tons per hour. A by-pass chute is provided around the crusher to the vibrating screen. The vibrating screen feeds No. 3 inclined conveyor carrying coal from the crusher house to the bunker level. A weightometer is installed near the tail end of belt No. 3. The coal enters the plant between boilers 1 and 2 at right angles to a traveling shuttle feeding the three sets of bunkers. The shuttle mounts a shuttle conveyor No. 4 and two airplane type conveyors 4A and 4B at either end to feed the two lines of bunkers. The bunker floor is cast in place concrete slab containing slots for coal feed. The slots are sealed by a Robbins belt sealer to keep dust nuisance to a minimum. Rotoclones are pro vided to maintain a vacuum in the bunkers to further hold down dust. The entire system is completely interlocked to protect personnel, equip ment and installation. All conveyors are sequentially protected from their discharge point back to the feeders. All flopper gates are equipped with metal clad mercury switches to assure the desired flow sequence. Hand cable operated, manually reset emergency stop switches are located paralleling each belt which permit stopping a conveyor at any point along its run. The normal interlocks then stop all preceding units. Complete control of the system may be had at the bunker level. Partial control of the system is located at the crusher house for storage operation. Feeders are selected by the track hopper operator but are started and stopped by the man at the bunkers. All conveyors and supporting steel are supplied by the t.'ebster Manu facturing Company. 10 WAD02008 SECTION XTT - CONTROLS AND INSTRUMENTATION The control systems are designed for supervision of each pair of units from a centralized control room. Local controls are held to a minimum con- rU'tent the nature of the equipment being controlled. Included in the lS.r0l rooms are boiler board and turbi ne board for each unit, common conCn]~board for control of common auxiliaries and electric switch board for t * ervi. sion,, of Csliwll titAchhlfyOavrrdl AaMn/Id oel Alenct tri/c rtenrld of rmWAaiinw mAaUcihinaeas. sup The boiler controls are designed to hold steam pressure over specified range when burning 100% coal, 100% gas or any combination of these two. Controls are pneumatic and supplied by the Bailey meter Company. The basic control varies air and fuel in the most efficient ratios to hold constant steam output pressure at varying steam flow rates. All dampers, control valves and other devices regulating flow of air or fuel are controlled auto matically by the system or remote manually from the central control room at the discretion of the operator. A Bailey three element feedwater control system is provided to hold boil er drum level. The system utilizes drum level, feed flow and steam flow as the three elements of control. The flow is regulated by a 6 inch Bailey pis ton operated valve located in the main feed line ahead of the high pressure heaters. A record of all important functions of the steam cycle and electric cycle is maintained by recording instruments on the boiler and turbine boards. The continuous recorders not only give operators trends of the value being measured but provides data for plant performance analysis. Deviations from normal operating conditions of level, temperature, pressure, etc. are indicated by a visual and audible annunciator system. On each board is mounted a set of indicating windows usually connected with func tions performed on that particular board. Motor operation, with controls in the central control room, is pro vided for feedwater control shutoff and bypass valves, H P heater shutoff and bypass valves, boiler feed pump discharge valves, deaerator emergency make-up valves and main steam block valves. The more important services are 125 d-c operated while the rest are 440 volt a-c. The feedwater bypass valves and deaerator emergency feed valves are provided with inching type control, the rest with open or close control. Supplementing indications on the main control boards various local indications are provided, where required, for checking performance. Among these local devices are pressure qaqes, industrial type thermometers and Qage glasses. SECTION XIIT - WATER SUPPLY AND TREATMENT There are six principal requirements for water including boiler feed, cooling, tower makeup, sanitation, fire protection and ash handling. These 11 WAD02009 can be classified under the sources that supply them. City Water River and '.'ell T,ater Boiler Feed Service 'A/ater Sanitation C. VJ. Cooling Tower Makeup Fire Protection Ash Handling K water 7- ity water supply enters the plant site through a/T4'> cast iron main, phe water to fire hydrants, hose connections and automatic transformer spray tective system is unmetered. V.'ater to boiler makeup and sanitation is Pr0 . metered as it enters the station building. water for boiler makeup passes through manually operated Fermutit zeo. softeners, one set per pair of units, where it is softened at a maximum of 60 gpm. The evaporator feed pumps pump this water to the Griscom Russell bent tube evaporator, one per unit, where it is distilled at a maxi mum net output rate of 13,500 lb per hour. The vapor passes to the individual deaerators and the brine is blown to waste. The evaporators are equipped with a deaerator preheater through which the softened water passes on its tvay to the evaporator shell. Steam for the evaporator coils is taken from the second extraction point on each unit. Manual coil inlet regulation is utilized for control of the evaporators.. Internal boiler treatment is provided in the form of dissodium phos phate injected into the drum by two Milton Roy positive displacement pumps per pair of units. Sulphite is injected into the boiler feed pump suction as an oxygen scavenger by two additional Milton Roy positive displacement pumps. Each pump will handle two units leaving one as a spare. Chemical storage, mixing tanks and pump suction tanks are located at ground level be tween each pair of boilers. Sanitary water is supplied to office and locker room facilities and to drinking fountains throughout the plant. River and Well Water To supply cooling and service water to the various requirements in the plant including hydrogen and oil coolers, boiler feed pumps, bearings, ash hopper seals etc. two shallow wells and three river wells have been provided. The river wells are located in the bank of the river to draw in the better quality river water. The shallow wells (50-55 ft), located away from the river, take water from the natural aquifier of lesser quality requiring more treatment than the river water. All river and well pumps discharge to a common settling basin in the C pump house. An automatic system maintains level in this settling basin by cutting in and out well pumps as required. Preference is given to the river water because of the better quality. Three vertical 2000 gpm service water pumps are mounted in the settling basin to supply the plants requirements. The common discharge of these pumps 12 WAD02010 tered in tlie PurnP house. Since this water is to be passed through the is ^ coolers, a polyphosphate inhibitor such as Calgon is injected to the !'^3" This is accomplished with a proportioning pump located in the acid tsr*e1aet.mr!1penntt room with its combination storage-mixing tank. An underground pipe line carries service water to the main plant where sseS through a twin strainer and a regulating valve set to hold a con|jt pressure in the plant service and cooling headers. The water, after sta ing once through the plant coolers is piped back to the C W pump suction i'3S e it is introduced to the circulating water system as makeup. . This make,w,,,attperr replaces water lost by tower evaporation and windaqe and by deconJentration blowdown ^Ff.TTON XTV - MATN SWITCHING, CONTROL AND PROTECTIVE EQUIPMENT Curator Leads The generator leads are 3" IPS copper tubes supported on 23 kv porcelain insulators mounted on steel frame work. They are covered with 1/8" thick formica having a dielectric strength of 650 volts per mil. This additional insulation extends from the terminals of the generator to a point 21 feet beyond the south wall of powerhouse. The leads pass through this wall by means of 23 kv Lapp porcelain wall bushings. Generator leads indoors are spaced on 2 foot centers and enclosed in expanded metal enclosure as protec tion to personnel. Generator leads outdoors are spaced on 4 foot centers and the delta connection to the three single phase step-up power transformers are spaced on 2 foot 6 inch centers. In the leads between wall and each transformer bank is mounted a 23 kv 2000 ampere, gang operated disconnect switch for isolating generator, so that insulation readings can be taken without disconnecting main bus. This discon nect switch also permits energizing the unit auxiliary power transformer if desired without the 'generator running. The auxiliary power transformer is fed by means of 1-1/4 inch IPS copper bus. It can be isolated from main power transformers and generator leads by means of a 23 kv 400 ampere gang operated switch. See Main One Line Diagram drawing No. E-100362. Generator Neutral The generator neutral is formed at the terminals of the generator and grounded through 25 kva, 13,200-120/240 volt, single phase pyranol insulated distribution transformer connected on 12,210 volt tap. The neutral connec tion is metal enclosed. The transformer limits ground current to such a low value as to practically guarantee no burning of generator laminations during a ground fault. The voltage type ground detector relay across secondary of transformer can accurately detect ground faults within less than 5% of the nei|tral of tiie generator. 13 WAD02011 ^e potential transformers are in a metal cubicle located on mezzanine 0f generator pedestal. They are connected to generator leads by means ^^rrent limiting primary fuses, so sized as to prevent a faulted potential of cUrormer from acting as a bus fault, but not to provide thermal overload ptrarontSec.tiinonn for the potential transformer. 5econdary circuits are fused for metering and unfused for relays and tomatic voltage regulator supply. au inhtnjjia and .Surge Protective Enuinment Lightning and surge protective equipment includes one 12 kv lightning ester and one 0.25 mfd capacitor per phase for protection of each generaf r> This equipment is mounted underneath generator leads on a steel platform'outside south wall of powerhouse. They are enclosed in housing of expanded metal to prevent accidental con tact by birds or animals with possibility of resultant grounds or shorts. Xhe housing also prevents the danger from flying of broken porcelain in the event of destruction of lightning arrester, while permitting the escape of oases. The protective equipment can be easily isolated by means of three hook stick operated 23 kv - 400 ampere disconnect switches. r,,rrent Transformers Two current transformers are located on each generator terminal bushing. Those on generator neutral, are one each for generator differentail type pro tection and transformer protection, while one of those on line side is for other side of generator protection and remaining sets is for metering and line drop compensation of automatic voltage regulator. Generator Excitation Excitation for each generator is supplied by a shaft driven separately excited exciter rated 145 kw, 250 volts and direct connected pilot exciter rated 4 kw, 250 volts. A generator field cubicle, mounted on generator pedestal mezzanine floor, houses generator field circuit breaker, discharge resistor, and shunts for field ammeter and rotor temperature recorder. Generator Control Switchboard The generator control switchboard is a part of the main electrical switch board and controls generators, exciters, auxiliary power supply, and 115 kv feeder circuits. Unit load controllers are used to proportion load between all three present machines and can be easily expanded to care for any addi tional machines in the future. There is also flat frequency control, flat tie line control or tie line bus control. 14 WAD02012 The control wiring is 19/^22 Awg multi-conductor 600 volt tinned copper ble. Control cables are installed in galvanized expanded metal cable trays ca tjie station wherever multiplicity of runs permit, or in conduit where inJJviuual runs are required. The protective relaying for the main electrical circuits consists of ime delay overcurrent relays connected in a current summation circuit for each generator, each main power transformer bank and each unit auxiliary transformer. The start-up auxiliary power transformer is protected by 15 kv fused disconnect switches. A voltage type ground relay is connected in paral lel with a 27 kw loading resistor, across the 240 volt winding of neutral erounding transformer. The voltage of operating coil of this relay is low enough to detect a ground fault within approximately 4% of the generator neutral. By means of voltage limiting network the relay coil can withstand the voltage that would be impressed on it with a phase lead solidly grounded. SECTION XV - AUXILIARY ELECTRICAL EQUIPMENT Unit Auxiliary Transformers The unit auxiliary power transformers are located outdoors adjacent to main generator leads and just south, of powerhouse wall. They are rated 6000 kva OISC 13,200 volts delta to 2400 volts delta with two approximately 2-1/2% full capacity taps above normal voltage and same below, and have approximate ly 8% impedance. Transformers have provision for future forced air cooling to increase rating to 8000 kva. High voltage bushings are rated 25 kv and low voltage 8.66 kv. A flanged throat is provided on the top of the trans former for bolting on the metal enclosed bus to be used for the 2400 volt connections. .lain Auxiliary Switr.hoear For each generator and one common the main auxiliary switchgear consists of one metal-clad, 5 kv switchgear group arranged as a single bus. Large motors are supplied directly from this switchgear. Remote electrically oper ated non-automatic emergency tie connections are provided between the four different transformers and 2400 volt switchgear groups. Circuit breakers are rated 1200 amperes except the Incoming and Tie breaker in each group which are rated 2000 amperes. All breakers have an interrupting capacity of 100 mva at 2400 volts. This switchgear, as well as station service transformers and 480 volt power centers, is located in two separate rooms. One between the first two boilers and other west of the third boiler. The rooms are isolated from all steam lines, water lines, etc, for maximum reliability and minimum maintenance. 480 Volt Power Centers 15 WAD02013 0joX--awer Centers jhe 480 volt power centers are used to supply motors from 75 to 150 hp lusive and several 480 volt motor control centers. Generators No. 1 and illC 3 each have two of these power centers. Generator No. 2 and Common each ^' one. These power centers are of metal-clad construction each with dry air cooled, 2400-480 volt, 3 phase, 1000 kva transformer, throat conl'Pted to 600 volt drawout breakers. The 1000 ampere main and 1200 ampere lieC breakers have 50,000 ampere interrupting capacity. The motor and feeder leakers have 25,000 ampere interrupting capacity. The motor control centers e all fed through a total of seven (7) 400 ampere (4% on 1000 kva base) reactors in order to limit the possible short circuit current to not over [5,000 amperes. JAP, ynit Motor Controller Centers The 480 volt motor control centers are fed from the power centers through air cored current limiting reactors as mentioned in previous paragraph. This limitation of fault current is required because of the use of circuit breaker tvpe combination starters for the control of all motors up to 60 hp. The control centers are distributed at strategic locations throughout the plant, each approximately near the center of the group of motors controlled by it. Short circuits in motor leads or windings is to be cleared by the air cir cuit breakers, while sustained locked rotor current and thermal overloads on non-essential motors is cleared by thermal type overloads tripping the mag netically operated contactor. On essential drives the thermal overloads sound an alarm only and it is up to the operator to ascertain the cause and remove trouble or stop the motor before it fails. fooling Tower Control Centers Each unit has a unit substation type of control center for cooling tower fans. Each center consists of 500 kva, 2400-480 volt, three phase outdoor type OA transformer .throat connected to outdoor type motor control center. Each cooling tower cell fan starter is for two speed two winding motor and is capable of reversing the fan on low speed in order to blow warm air out through inlet louvers for melting ice accumulation. The unit substations for first two units is a double ended unit with transformer sized so that either transformer can supply the fan motors for two units. The substation for third unit is single ended to which can be readily added the transformer and starters for fourth unit to make a double ended unit. One section of each group of starters is devoted to a single phase transformer and small lighting panel for lights on cooling tower and local yard areas. The trans formers are protected against faults and heavy overloads by relays in 2400 olt switchgear, one breaker feeding each transformer. Handling Control Center There is a single system of belts etc. for feeding coal from railroad cars or storage to bunkers or storage. All coal handling motors, including crusher, receive power and are controlled from a unit substation type of contrl center. It consists of a 500 kva, 2400-480 volt, three phase outdoor 16 WAD02014 typ OA transformer throat connected through building wall to indoor type con trol center, located in control room on first floor of crusher All starters are combination type with manual circuit breaker for bLl1 t circuit protection and magnetic contactors, d-c operated for magnetic -'i,orrator pulley and contactor type for 150 hp crusher motor. The trans- ^ePaer is so sized and space is available for enough starters to double the tor^eIlt rate of coal handling. The transformer is fed from 2400 volt switch- Pre through its own breaker, on the front panel of which are mounted neces- -eav instruments and relays, y ;iotor control stations for the majority of motors are located in the ntral control room, with remaining motors controlled from local stations, Cuch as coa* handling from control station above bunkers, in crusher house god at track hoppers, and cooling tower fans from top of cooling tower. cxcept fr motors started by circuit breakers, the control stations are gen ially of the maintaining contact control switch type. pn,.,pr '/irina for Station Auxiliaries For the station auxiliary power wiring an oil base rubber compound insu lation, rated 5000 volts for the 2400 volt circuits and 1000 volts for 480 volt a-c and 250 volt d-c excitation circuits is used. Indoor power cables are generally run in exposed galvanized steel conduits and conduits in the sand fill of the basement floor. Power and control wiring from the main plant to the cooling towers, circulating water pump house, coal handling power transformer and switchyard is run in Korduct conduits encased in con crete envelope. Minimum power cable size is No. 3/0 Awg for 2300 volt cir cuits and No. 12 for 440 volt circuits. Control I'/irinn Conduits and galvanized expanded metal cable trays carry the control wiring. Access platforms suspended from floor beams of operating floor serve all cable trays and make them easily accessible. Thus there is a very high degree of flexibility in arranging the control circuits, a maximum ease of installation and ready accessibility for maintenance or rearrangement. Station Grounding System The station grounding system consists of a ground bus of 3" by 1/4" gal vanized steel strap. In order to secure the lowest possible resistance ground the ground loop was connected to the metallic casings of river well pumps, two ash water pumps in gravel pits, two shallow well pumps and two deep wells T10 feet and 1700 feet deep respectively. Also to increase the ground surface available for dissipation of large ground currents, as well as minimize ground resistance in the high resistivity soil of gravel and/or clay the metallic shells of not less than 40 Raymond concrete piles under the build ing foundations and 16 or more under the concrete stacks are all connected to the grounding grid. 17 WAD02015 SECTION XVI - COfOmCATION EQUIPMENT Communication comprises three individual systems: 1, Cell System This system is entirely independent of other systems, having its njividual conduit and wire. There is one instrument located in each control room and the rest are in office area. 2. Tntrasite Telephone System This is a completely automatic, selective talking, selective ringing dial type system equipped for 50 lines with a code calling machine and code call single stroke bells. The telephone system is for operation on a 24 colt battery complete with charger, used exclusively for this purpose. There are 30 code call bells which are operated on 120 volts d-c supplied from the station battery. The initial installation consists of 36 instruments located strategically about the plant, cooling tower, transformer and switchyard, pump house and main gate location and equipped for five simultaneous conver sations. Instruments at noisy locations are equipped with loud ringing bells. Special features of the system include an executive right-of-way selector, and conference call. 3. General Emergency Alarm System due to the limited number of operating personnel and relatively large operating area covered, experience demonstrated the need of a general emergency alarm system so that all personnel can get to their assigned sta tions as soon as possible on a "Unit" emergency. The type of equipment to fulfill the necessary requirements is essentially a non-interfering fire alarm type, actuated by code box located near each boiler gage board. VJhen initiated the code will be sounded on all horns and repeat four times, which cycles is repeated if the box is pulled again. In the event that two boxes are pulled almost simultaneously, the box which is pulled first will complete its four rounds, and the second box shall then go through its complete oper ation, designating that there is an emergency in both locations. The boxes operate in conjuction with a closed circuit central station control panel, through which any required number of signals may be operated. The present system consists of a total of four signals, two of which are electric re sonating horns and two are six inch compressed air horns with an electrically operated air valve. SECTION XVII - SWITCHYARD _ain Power Transformers Each main transformer bank consists of 3 - 16,667 kva, single phase, ^ cycles self cooled transformers with provision for future forced air cool- to increase the continuous rating to 22,250 kva. They are 13,200 volts Uelta to 110 lev wye with two approximately 2-1/2% full capacity taps above 18 WAD02016 al and two same below normal voltage, operated by external hand operated "^load tap changer. The system operates with solidly grounded neutral so n the Inoigfh tension winding has low tension bushings. graded The insulation high voltage and neutral bushing bushings are high is duplialtitude ca 16 The transformer tank is so constructed that it can be removed at the l^e'and avoid lifting core and coils. It is of the welded joint construc tion throughout except for gasketed joints for manholes, bushings and radia tors. it Breakers The 115 kv il circuit breakers in the switchyard are rated 800 ampere, 11" kv 2500 mva interrupting capacity and are arranged for switching gener^tors and lines from a split operating bus. See Drawing E-100416. [inht.ninn Protection Lightning protection is provided by complete shielding of all electri cal equipment by shield wires extending over the switchyard from all the in coming lines to the turbine room south wall. In addition station type light ning arresters are installed on each incoming line. w.iitr.hvard Structural Design The switchyard is of the low-open structure design using 2" SPS copper tube on pedestal insulators for both the main operating bus and inspection bus on seven foot phase spacing, and located approximately 17 feet above the ground. Steel supporting towers of continuous "A" frame type are located betreen the two buses. The incoming transmission lines and connections to main power transformer banks are terminated on these towers. The main switch yard for first three units is arranged in 40 foot bays, occupying an area of approximately 340 feet by 187 feet inside the fence. This allows room to move the inspection `bus south to provide space for the installation of oil circuit breakers in the circuits from this bus, if ever desired. Relay Protection Relay protection in the 115 kv switchyard consists of two sets of poten tial (from CTs) type bus differential protection, one on each bus section; current summation inverse time overcurrent relays on the power transformer banks; zoned distance impedance type, current polarized directional ground relays and pilot wire directional ground protection on the four outgoing feeders. The instruments, control switches and all relays are a part of the main control board for Units No. 1 and No. 2 and is located in the control room common to these two units. 19 WAD02017 SECTION XVITT - n-C CONTROL SYSTEM switcAhy1a2r5d, vcooltnsdi-sctincgonotrfool nesy6st0emceisll usstoerdagfoerbbaotttherytheramteadin SnAnlant dj , 6 on the six hour discharge rate to 1.75 volts per cell and positive plates and seven negative plates. The batterv ^ a?fe5e hours h has six floated on a 10 kjr diverter pole changing''gener^ ^ fv gTST' t Its design is such as to absorb the most of s,,rid*ni,, " ?" 7 15 hP motorrequirements and thus increase the life of the battery^1*^ Cntro1 current This system provides for the installation of three units and must be supplemented by a similar duplicate system with interconnecting tie for any future expansion. See Drawing No. E-100411. SECTION XIX - LIGHTING A two wire 115 volt, single phase lighting distribution system, with its midpoint solidly grounded is used for the station building, switchyard, pump house, cooling tower, coal handling and yard lighting. The turbine bay uses a combination of hi-pressure mercury vapor lamps and incandescent lamps. The control room is illuminated by fluorescent fixtures above a louvre-all ceiling and they can be switched to give any one of three levels of illum ination. SECTION XX - CATHODIC PROTECTION A cathodic protection system to protect all underground steel, such as piping, conduit and steel ground grid. The ground grid is 1/4" x 3" or 1/4" x 2" steel bar or 3/8" stranded steel cable since it is well protected by cathodic protection and bare copper would have drained protection from steel equipment. The anode ground bed consists of 31 anodes at an average of 15 foot spacing. It is located 40 feet east of the '/est property line. 20 WAD02018 SECTION II GENERAL FEATURES WAD02019 SECTION II GENERAL FEATURES WAD02020 PUBLIC SERVICE COMPANY OF COLORADO ARAPAHOE STEAM ELECTRIC `STATION 1950-51 88.000 KW INSTALLATION 1951 44.000 KW EXTENSION SECTION II - GENERAL FEATURES Early in 1947 it became evident that additional electric generating capa would be required in the Denver area in the near future. Also at this Cime, it was rea^zed that the expected recession in business after the war 1 rs was not to take place, and that the continuation of the growth of elec tric load throughout the entire system would require a planned program covering uite an extended period of time. As a result of this realization, Ebasco SerrviceSt Incorporated, of New York City, was invited to make a preliminary survey 0f the system for purposes of discussions prior to making final recommendations. These discussions were held in Denver, beginning July 14, 1947, and conclusions reached at that time resulted in recommendations for new construction for 1950 and 1951. However,later, a more extensive study of the power supply for the central system was made, resulting in a report issued in September of 1947 cov ering a planned program to and including the year 1955. Previous to the completion of the Arapahoe Steam Electric Station, the cen tral system of the Public Service Company of Colorado comprised units with total generating capabilities of 237,000 kw. The three gnits installed at the Arapa hoe plant added a generating capability of 144,000 kw, bringing the total capa bility to 381,000 kw for the central system at the time of the completion of the Arapahoe station. On August 21, 1947, Ebasco Services, Incorporated, negotiated a contract with the Public Service Company of Colorado to provide design engineering, and construction services for the initial installation of one 40,000/44,000 kw tur bine generator at a new site to be known as the Arapahoe Steam Electric Station. This site had been determined by the power supply study heretofore mentioned. On January 30, 1948, a supplement to the contract was issued covering an exten sion to the Arapahoe Steam Electric Station for a second 40,000/44,000 kw unit designated No. 2, and on September 1, 1950, another supplement to the original contract was issued, covering a further extension to the Arapahoe Steam Elec tric Station for a third 40,000/44,000 kw unit, designated No. 3. Although the contract called for one installation and two extensions, it was decided that since no design or construction was started before the issu ance of the supplement authorizing the second unit, to designate both Units No. I and 2 as the original installation, and Unit No. 3 as an extension. No ground breaking ceremonies were held; however, the specific date of August 2, 1948, was set as the official beginning of construction of this pro ject, namely the date on which the excavation for the circulating water tunnels was started. The original installation consists of two Babcock and Wilcox steam generalrs, each with rated capacity of 450,000 lb/hr, designated as Nos. 1 and 2; one 40(000/44,000 kw General Electric turbine generator unit, designated as No. WAD02021 y. one 40,000/44,000 kw Westinghouse turbine generator unit, designated as No. 2* three Westinghouse 16,667 kva, 115,000 volt power transformers, designated aS 1A, IB and 1C; three General Electric 16,667 kva 115,000 volt power trans formers, designated as 2A, 2B and 2C; and all necessary auxiliary equipment and structures for both units. The extension consists of one Babcock and Wilcox steam generator with rated capacity of 450,000 lb/hr, designated as No. 3; one 40,000/44,000 General Electric turbine generator unit, designated as No. 3; three General Electric 16,667 kva, 115,000 volt power transformers designated as 3A, 3B and 3C; and all necessary auxiliary equipment and structures for this unit. This plant is designed for 850 psig and 900 F. steam conditions and for the use of pulverized coal as the primary fuel, and natural gas as a secondary fuel. Although coal is the primary fuel, there are extended periods during warm weather when large quantities of gas are burned. Considerable coal stor age area with rail track hoppers is provided. A conveyor type system with crusher and screening facilities is provided for either moving coal from track hoppers to storage area without preparation, or moving coal from hoppers through the partial preparation equipment to the station bunkers. In addition to the coal storage area, considerable trackage is provided for live storage of coal cars to provide for a three-day holiday when only a skeleton crew for handling coal is available. Marley cooling towers are provided to dissipate the heat picked up by the turbine surface condensers. Make up water for these towers is derived from shallow wells and river wells. The turbine generator units and most of the auxiliary equipment are housed in a reinforced concrete, steel and brick structure. The steam generators are of the semi-outdoor type with an enclosed firing aisle near the top of the boil er and an enclosure at ground level housing the ash hoppers, the forced draft fans and drivers, and portions of the ash sluicing system. No conventional auxiliary bay is provided to house auxiliary equipment as considerable space, available at ground level and o'n the turbine operating floor elevation between bunkers, and at several elevations between boilers, was utilized to house the auxiliaries. The power and station service transformers, with their steel structures, are located just outside and south of the building in an area designated as the transformer yard, which is not fenced. The surface of this yard is covered with granite chips for maintaining better conditions in winter. An eight bay 115,000 volt switchyard is provided with steel structures, bus work, air break switches, oil circuit breakers, instrument transformers, and necessary conduit and control wiring, all of which is enclosed by an eightfoot chain link type fence with access gates. The surface of this switchyard is covered with granite chips similar to those furnished for the surface of the transformer yard. Trial operation of Unit No. 1 was initially scheduled for May 1, 1950. However, due to a three months, Denver Area, strike by the carpenters, and deiay in del ivery of boiler tubes which, in turn, brought erection into the bad weather period, causing further delay, trial operation was not realized until October 7, 1950. Trial operation of Unit No. 2 was scheduled for March 1, 1951, 2 WAD02022 -struction progress was such that this date was expected to be met with c difficulty; however, because of seasonal inclement weather, it was neclil rv to practically enclose the entire boiler with a heated weather housing, ^because necessary additional unexpected tests on both the boiler and tura0d venerator were required, trial operation was delayed until March 15, 1951 bl, oration of Unit No. 3 was scheduled for November 1, 1951, but delivery Immaterial was such that it became necessary to work two shifts if oif . 1,,rn.parraattiioon was tou buec accomplished in November. Trial operation was actfia Realized November 17, 1951. tually lit facUitiea Shortly after the construction starting date it was decided, as a job econf ctor, to purchase as much of the construction equipment as was required 0<l* ^out'the job, and use rental equipment only as a fill-in for short perittirof work; therefore, construction equipment was purchased from time to time ds nUiredfor proper prosecution of the work. Eight pieces of heavy equipaS t and approximately 77 pieces of light equipment, including trucks, but not deluding the conventional small tools, were acquired during the construction period. Temporary construction buildings consisted of an office, warehouse, gener al construction supervisor's office, and timekeepers' office, all of structural teel frame with corrugated aluminum sidings and roof (Butler buildings), and additional buildings for use as change houses, contractors' offices and storage rooms, erector's tool rooms, and workmen's toilets, all of which were obtained by purchase of wood barracks at Buckley Field, near Denver. These barracks, which were approximately 20 feet by 100 feet, were cut into two parts and hauled to the job site. The field office was a 20 foot by 70 foot building with neces sary facilities for the personnel employed therein. This building was placed on a temporary reinforced concrete slab. The warehouse was a 40 foot by 100 foot building similar in structure to the office building. Necessary bins and facil ities for storing material were provided as well as a small inside office for the warehouse personnel. All of these temporary construction buildings were first located southeast of the building site during the construction of Units No. 1 and 2, and late* with the exception of the office and warehouse, were moved approximately 500 feet west when Unit No. 3 construction started, for proximity to the new construction area. No provisions were made for a concrete mixing plant on the job. A con tract was made with Colorado Premix Concrete Company to provide ready mixed concrete as needed. Only equipment grouting and other small requirements were mixed on the job. The usual temporary walkways, ladders, platforms, hand railings and barri cades were provided as required during construction. Two 1948 Chevrolet sedans and a 1948 Chevrolet station wagon were purchased by the Ebasco Services, Incorporated, during the early part of the construction program. The sedans were assigned to the construction superintendent and the general construction supervisor, and the station wagon was assigned to the re sident engineer until April 29, 1949, after which date the station wagon was unassigned and used for the purpose of picking up small field purchases, and for other transportation. On April, 1951, this station wagon was transferred to the Public Service Company for assignment to Mr. A. P. Vail. On September 1, 3 WAD02023 resident engineer arrived on the job, and the sedan being used by 1950 "uCtion superintendent was reassigned to the resident engineer, and a the ne* cons 1950 Ford sedan was purchased for the construction superintendent. ssary power and light transformer facilities for construction purposes ^ovlded by the operating company and the power consumed billed to the *ere Prff4Ce through their regular monthly charge letter. To provide these nefieelld power and lliight facilities, the Public Service Company of Colorado con- ceSS3ted a 13 kv overhead line from their distribution system to the north edge sirUh plant site. From this point, a temporary overhead line was strung to the truction bank of transformers where switching and metering equipment was CnS-ded on the primary side. These transformers remained in this position un- PrVgeptember 28, 1950, when the area was needed for coal storage, at which the bank was moved to the south side of the station building adjacent to tlDiei3 kv standby station service transformer, where it remained until released the on January 29, 1952. Three telephone trunk lines and the necessary extensions were provided in he field office. One line was limited to the Superintendent's office, and the other two were on a rotary system which added flexibility to the limited number ,,f lines. All calls were received by the receptionist and referred to the proper per sons. 1ahftr Police The great majority of the work on this project was performed by Ebasco forces, the exceptions being pile driving, plant piping, heat insulation, stack and cooling tower erection, electrical work, roofing and painting. The piping contract was on a cost plus basis. The pile driving, heat in sulation, roofing, electrical work and painting contracts were on a unit price basis, and stack erection and cooling tower erection were on a lump sum basis. On cost plus work, payrolls were kept by the various contractors and foremen's daily reports submitted, which were checked by the field office time checker, classified by the cost department, and approved by the Resident Engineer. Both Ebasco Services and contractors used local union field labor exclusively. This did not include office employees. The Superintendent, Resident Engineer, Construction Accountant, and Cost Engineer were carried on the Ebasco New York payroll. An Ebasco field payroll was set up to take care of all field employed personnel. Details of this pay roll are expanded in the accounting section of this report. The project as a whole was operated on a 40-hour per week schedule except for brief periods when a 48-hour schedule was maintained to expedite completion of certain phases of the work, especially at a time just prior to placing in service of a turbine generator unit. The local union wage scale for the various crafts was employed at all times. Overtime for all crafts was paid for on a basis as shown in the following schedule. 4 WAD02024 Over 8 Hours Saturday Sunday Boilermakers Bricklayers Carpenters Cement Finishers Electricians Insulators Ironworkers Laborers Mason Tenders Millwrights Oilers Operating Engineers Pipefitters plumbers Sheet Metal Workers Truck Drivers Warehousemen Welders 22 22 22 us 1% 1^ 1$6 1& 22 \Vi 1J 1J 1J 22 1^ 1 1% 1^ 2 1J 2 1% 22 1% 1% 1 1 2 1& 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1> 2 Wage rates of practically all the crafts were increased from time to time during the approximately three-year construction period. The following is a tabulation showing classes of labor and rates paid during the major portion of the project. Boilermakers Welder Helper Craft Foremen Gen. Foremen Oct. 1, 1948 Oct. 18, 1949 April 1, 1951 August 3, 1951 2.25 2.50 2.00 2.10 2.25 2.25 2.25 2.35 2.50 2.50 2.50 2.60 2.625 2.75 2.625 2.725 2.75 2.875 Bricklayers Craft Foremen Gen. Foremen July, 1949 3.00 3.50 3.75 Carpenters Craft Foremen Gen. Foremen April 30, 1948 July 1, 1950 2.10 2.35 2.365 2.6437 2.75 Concrete Finishers Craft Foreman June, 1948 May 1, 1950 Jan. 1, 1951 July 1, 1952 2.25 2.32 2.40 2.475 2.50 2.57 2.65 2.725 5 WAD02025 2Ti. St. 8. 1951 IrucXJliifiti June, 192SL g"apy tl.i 11. 9510950 Feb. 1, 1951 fflfp.iers June, 1948 July, 1949 July, 1950 June 7, 1951 Trpnworkers June, 1948 June 4, 1949 June 4, 1950 Jan. 1, 1951 Apr. 1, 1951 Sept. 17, 1951 Operating Engineers ' June, 1948 June 4, 1949 June 4, 1950 Sept. 1, 1950 Jan. 1, 1951 July 1, 1951 Laborers June, 1948 May 1, 1950 Sept. 1, 1950 July 1, 1951 Lathers June, 1948 July, 1949 July, 1950 Craft Foreman 2.25 2.41 2.50 2.65 2.75 2.40 2.60 2.70 2.86 3.00 Craft 1.50 1.55 1.60 1.65 Outside 1.72 1.75 1.82 1.92 1.89 2.00 2.10 2.20 Craft Firemen 2.00 2.10 2.20 2.25 2.30 2.35 2.25 2.35 2.45 2.50 2.55 2.60 Hindi Irudts Compressors & Pumps Tractors Air Tuggers .Oiler 2.00 2.10 2.15 2.20 2.25 2.31 1.45 1.55 1.60 1.65 1.70 1.70 Air Tools Craft Pusher 1.75 1.80 1.85 1.955i 1.40 1.45 1.50 1.575 1.65 1.70 1.75 1.825 Craft 2.25 2.50 3.00 6 Gen. Foreman 2.90 3.07 3.25 Foremen 25* Additional Per Hour Gen. Foremen 2.60 2.70 2.75 2.80 2.85 Crane Operator 2.15 2.25 2.30 2.35 2.40 2.48 Foremen 1.90 1.95 2.00 2.075 Foremen 2.50 2.75 3.25 WAD02026 June, 1948 May 1' 1V^C Sept. 1.1950 jliXUriqht.s April 30, 1948 July 1. 1950 Painters June, 1948 July, 1949 July, 1950 July 1. 1951 pipefitters June, 1948 July, 1949 April 1, 1951 plasterers June, 1948 July, 1949 July, 1950 Elumb.ers June, 1948 July, 1949 April 1, 1951 Roofers June, 1948 July, 1950 April 1, 1951 iheetmetal Workers June, 1948 July, 1949 July, 1950 lile June, 1948 July, 1949 July, 1950 ec. 18, 1950 Craft 1.75 1.80 1.85 Craft 2.10 2.35 Craft 1.925 2.05 2.125 2.34 Craft 2.24 2.40 2.65 Craft 2.25 2.50 3.00 Craft 2.24 2.40 2.65 Craft 2.10 2.25 2.35 Craft 2.00 2.125 2.325 Craft 2.25 2.375 2.50 2.60 Foremen 2.365 2.525 2.915 Foremen 2.365 2.525 2.915 Foremen 2.00 2.05 2.10 Foremen 2.365 2.6437 Fnremsn 2.175 2.30 2.375 2.59 Gsiu. Foremen 2.615 2.775 2.9812 Foreman 2.50 3.00 3.25 Cm*. Foremen 2.615 2.775 3.0475 Foremen 2.225 2.50 2.60 Foremen 2.25 2.375 2.575 Foremen 2.50 2.625 2.75 2.85 7 WAD02027 Ebasco Services at all times were particularly careful in assigning work ious crafts to eliminate as much as possible jurisdictional disputes, to v*r strikes or differences of opinion which did occur were in most cases The ^gSUits of area, rather than job, disputes. During the greater portion of the construction period, the labor relations toent of Ebasco Services, New York Office, was aware of, and greatly as- ^ted in t*ie handling f labor disputes requiring decisions by the unions' in ternational boards. The procurement of all major equipment and some miscellaneous material and nplies was made in New York by the Purchasing Department of the design and instruction division of Ebasco Services, Incorporated, as agent for the Public Service Company of Colorado. Requisitions were issued by the design division to n,asco Purchasing Agent, who also furnished factory inspection and expediting services. At first 3, and later 5, copies of all purchase orders, and all sup plements thereto, were furnished the field construction office. Local purchases were made by the field purchasing agent located in the field office at the job site. For items of any consequence, regular written inquiries were sent out to various vendors asking for formal quotations, which were assembled on a comparison of bid form for selection and placing orders. The price and delivery usually governed placing of the order. Local orders were issued by the field purchasing agent on authority from requisitions approved by the construction superintendent and the resident en gineer. Special purchase order forms printed by Ebasco Services in New York for Public Service Company of Colorado were used and designated for the project by the initials SD, starting with the numeral 1 and running consecutively. No at tempt was made to give a separate series of numbers for each of the three units. Order numbers were used as the need required, regardless for which unit the ma terial was to be ordered. The State of Colorado and the City of Denver assess a use and sales tax of 2% and 1% respectively, which are not applicable to transportation; therefore, all orders possible were placed on a basis of F. 0. B. shipping point or F. 0. B. shipping point with freight allowed to destination. Five (5) copies of all invoices were furnished the field office on both local and New York orders and were carefully checked for price, terms, and ex tensions against the order. The invoices on New York orders were sent by the vendor directly to the Ebasco purchasing department in New York, which forwarded them to the field office after their approval. Payments were made according to the terms of the orders, except that final retention payments were not made until approval was received from Mr. R. F. Throne, or Mr. W. D. Hardaway, of Public Service Company, and Mr. R. B. Chase, of Ebasco Services, New York. All purchase orders issued for this project noted that material was to be shipped to Public Service Company of Colorado, Arapahoe Steam Electric Station, Denver, Colorado, care of Mr. B..A. Snow, Construction Superintendent. 8 WAD02028 jyr(;ttuntinq Standard Ebasco forms were used for all accounting purposes. Books of ac count used on this project were: General Ledger, form A--1; Check and Voucher glister, fora A-2; Job Control Ledger, form A-4; and Detail Cost Ledger, form A-5a Bev. Books were closed at the end of each calendar month and a Trial Bal- ance, form Rev., prepared from the balances as reflected in the control accounts. A detailed Statement of Construction Accounts, form A-lOa Rev., was prepared from balances as reflected in the detail cost ledgers. Five copies of each of these reports were submitted to Mr, D. P. Roberts, Property Accountant, 0f Public Service Company, and three copies to Mr. G. P. Redden, Assistant Treasurer of Ebasco, New York. This procedure was followed until March 31, 1952, when a decision was reached by Ebasco, in collaboration with the Client Company, whereby the Statement of Construction Accounts would henceforth be pre pared quarterly. An Estimate of Cash Requirements, form 505 Rev., was prepared by the Ac countant as of the last Thursday of each month. Two copies were submitted to Mr. Roberts, one copy to Mr. Throne, and two copies to Mr. Redden. Immediately following the production of the monthly Statement of Construc tion Accounts, and upon receipt of the monthly letter of transmittal from Pub lic Service Company incorporating charges to the construction project accumu lated by them, a so-called Interest Report, Field Office form, was compiled, showing the allocation of total expenditures to date to Units 1, 2 and 3. Six copies of this report were submitted to Mr. Roberts. Work orders were issued in numerical sequence, covering the accumulation of costs of work performed for the account of sub-contractors, vendors, etc. At the time of completion of work order, an invoice was prepared and transmit ted to the vendor or sub-contractor concerned. A "Status of Work Orders" was prepared monthly, showing the work order number, vendors' names, Ebasco pur chase order number, Unit to which the work order applied, our field invoice number, when billed, and the amount involved. Distribution of this report was the same as distribution of work orders, five copies to Public Service, three copies to Ebasco, New York, and four copies to Ebasco Field Office. General Account (Working Fund): An initial advance of $10,000 was deposit ed in the First National Bank of Denver, Colorado, July 28, 1948. Subsequent deposits, $15,000, September 22, 1948, $25,000, October 13, 1948, $25,000, Dec ember 14, 1948, $75,000, March 22, 1949, and $50,000, February 7, 1950, brought the General Account to a total of $200,000. Payroll Account: An initial advance of $500 was deposited in the American National Bank of Denver, Colorado, August 5, 1948. Subsequent deposits, $1,000, October 14, 1948, $8,500, March 4, 1949, and $5,000, September, 1949, brought the Payroll Account to a total of $15,000. This account was built from funds withdrawn from the General Account and was a part thereof. Petty Cash Account: A Petty Cash Fund of $750 was established by funds withdrawn from the General Account. Initial withdrawal of $100 was made Octo ber 21, 1948, with subsequent withdrawals of $150 May 10, 1949, and $500, June 1. 1949. This account was also an integral part of the General Account. 9 WAD02Q29 Withdrawals from the General Account were by regular Ebasco Voucher Check, A-7, which required any two (2) of the following signatures: B. A. Snow, ^rIDtruction Superintendent; E. Rans, General Construction Supervisor; W. I. Const1 U uilburn, ,, Resident _________ Engineer; MIf . IW.IUh; i*tm____o__r_e_, Aa_c__c__o___u__n__t_a___n__t__;____a__n__d_i nR. nC. nB.o-oxtih. , C^_o__n__struc- . Manager, whose signature mao lauci aupciacucu uy nidt ui r. j. oawycx , ^^truction Manager. Restoration of withdrawals from this account were by cnlar voucher checks of the Public Service Company of Colorado in payment, fpon presentation, of Ebasco Reimbursement Requests, form A-17, Withdrawals from the Payroll Account were by regular Ebasco payroll checks, r(D T-12A, requiring one (1) of the aforesaid signatures. Restoration of withHawals from this account were made through an Ebasco voucher check in payment 0f an Account Payable Voucher, form A-6, supported by a copy of the approved field payroll. Petty cash disbursements were made by the Accountant. This fund was kept in cash in the vault of the field office, and was used for payment of photo graphs , blueprints, postage, express, drinking water service, office supplies, and small items of construction materials not warranting the issuance of a field Purchase Order. In most cases, a numbered 'Teller's Slip", was issued by the Field Purchasing Agent, coded, approved by the Construction Superintendent, Resident Engineer, or the Accountant and signed, as cash received, by the per son actually making the payment. This slip was then attached to the paid in voice or delivery ticket. Restoration of expenditures of this fund was made by Ebasco Voucher check to the Accountant through an Account Payable voucher supported by Petty Cash Reimbursement Sheet, form A-12. Monthly Bank Statements, covering the general and payroll accounts, were secured from the respective banks by the auditing department of the client com pany each month and reconciled to construction funds advanced as reflected in their ledgers against Ebasco Services, Incorporated. The statements were then forwarded to the Ebasco field office, where they were reconciled to book bal ances. These reconciliations, form A-13, were then transmitted to Mr. G. P. Redden, Ebasco, New York, and to Mr. D. P. Roberts, Public Service Company, Denver, Colorado. Contracts Practically all of the major field office contracts were on either a lump sum or unit price basis. The lump sum type contract required very little su pervision, but close inspection was necessary to make certain that the proper materials were used and that first-class workmanship was provided. Material furnished by the contractor was received and reported on form T-5, and approved by the proper supervisor and the warehouseman. The unit price contracts required Ebasco supervision and inspection. Ma terial for this type contract was almost entirely furnished by the owner; how ever, after recording by Ebasco Services, Incorporated, it was the responsibil ity of the contractor to receive and care for this material until installed. Sub-Cnnt.rar.t S Contractors on cost plus work were required to furnish Contractor's Daily Labor Reports, form T-6b, which were checked, approved, extended, coded and filed to substantiate billings when made. Ebasco time checkers made daily checks of all subcontractor's employees on both Contract and Cost Plus work. 10 WAD02030 Payment to the lump sum contractor was made in full at the completion of contract, and after approval by the owner. the Payment to the unit price contractor was made monthly or periodically on a tractors estimate, form 502, which was made up by the cost department, checked c ^ Resident Engineer and the Accountant, and approved by the Construction ^ erintendent. Payments to cost plus contractors were made periodically on which were backed up by the daily approved time sheets. Final payment bl all contractors was made after quantity checks and determination that the tr)l was satisfactory, and approved by the Public Service Company of Colorado, "he Resident Engineer, the Accountant, and the Construction Superintendent. A form letter was used for these final payments. Insurance coverage carried by the contractor was set and approved by the public Service Company of Colorado legal department, and certificates of valid ity were furnished the owner from the contractor's insurance company. Each contractor was required to carry insurance as follows: 1 - Workman's Compensation 2 - Bodily Injury and Property Damage (a) PL & PD (b) Contractors contingent liability (c) Automotive liability payrolls Payrolls were prepared weekly and payment made by check. Payroll periods originally were from 12:01 AM Thursday through 12:00 midnight Wednesday, and payment made to employees Friday afternoon each week. As of October 14, 1948, a new payroll period was established, 12*^01 AM Monday through 12:00 midnight Sunday, and payment made to employees Wednesday afternoon each week. Field em ployees were checked in each morning by picking up their brass numbers corre sponding with the numbers on celluloid buttons issued to the individual. Time checkers made two field checks daily, one in the middle of the forenoon and one during the afternoon. A final night check was made when employees turned in their brass checks before leaving the property. Regular Ebasco forms were used in the timekeeping department: Employment Card, form T-l; Change of Rate No tice, form T-3; Notice of Discharge - Quittance, form T--4; Daily Check Sheet, form T-5; Foreman's Daily Report, form T-6a; Employee Time and Tax Record, forms T-8b and T-8d; Construction Payroll, form T-9; Payroll Distribution Ledger, form T-lOa; and Payroll Check, form T-12a. Foreman made up and turned in a re port each day which was checked against the Time Checker's daily check sheet, turned over to the Cost Department for coding, and then given to the timekeeper for extending and posting to the Time and Tax Record. Foreman's Reports were then handed to the Payroll Distribution Clerk, who made a daily recap of hours and money to each coded account and posted to the Payroll Distribution ledgers. The Foreman's reports became a permanent part of the voucher payable, and the time checker's check sheets were filed for future reference. Construction payPayrolls were typed from Employee Time and Tax forms in quadruplicate. One C0Py each for the original and two copies of the Account Payable Voucher and jhe quadruplicate filed in a post binder for ready field office reference. All labor was engaged by and considered employees of Ebasco. 11 WAD02031 On January 7, 1952, Employee Time and Tax Records were split into two (2) payrolls. One payroll consisted of crafts only, and the second payroll con sisted of all office personnel, supervisors and field engineering crews. This second payroll was kept strictly confidential and all checks sealed in window envelopes before delivery to the individual. This confidential payroll was discussed with Hr. John Connell, Auditor, of the Client Company, before it was actually put into operation and, with his concurrence, was formally adopted on the above date. Payroll deductions from employee's earnings consisted of: Federal Old Age Benefit - 1% of earnings up to and including $3,000 through December 31, 1949; l_l/2% of earnings up to and including $3,000 for the year 1950; 1-1/2% of earn ings up to and including $3,600 from January 1, 1951, to the conclusion of the project; Federal Withholding Tax - withheld in accordance with Circular E, as revised each year and supplement issued October, 1951, by the Commissioner of Internal Revenue, Washington, D. C. Amounts withheld from employees for Feder al Income Tax and Old-Age Benefit, along with the employer's contribution for Old-Age, Federal Unemployment and State Unemployment, were reported on forms T-16 Rev., T-17a Rev., and T-17b Rev., and remitted to Ebasco New York Office for transmittal to the Governmental Authorities. Insurance Ebasco Services, Incorporated, New York Office, furnished the following insurance: Workmen's Compensation and Employer's Liability Policy Numbex Insurance Company Term ELUB 2541252 ELUB 90345 ELUB 535370 ELUB 1169799 ELUB 2046705 Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. 12/31/47-40 12/31/48-49 12/31/49-50 12/31/50-51 12/31/51-52 Coverage Statutory in accordance with Colorado Workmen's Compensation and Occupational Disease Law. Employers' Liability - Limit $100,000 each accident for injuries other than Occupational Disease; $50,000 each person, $100,000 each accident for Occupational Diseases. Primary Public Liability and Property Damage Policy Number Insurance Company Term SLG 2541253 RDS 403109 SLG 90346 RDS 535373 SLG 535371 SLG 1169800 SLG 2046706 Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. Travelers Ins. Co. 12/31/47-48 12/31/48-49 12/31/48-49 12/31/49-50 12/31/49-50 12/31/50-51 12/31/51-52 WAD02032 Coverage - Third party liability for personal injury and property damage. Limits $5,000 each person, $10,000 each accident for personal injury; $5,000 each accident, $25iOOO aggregate for property damage. Automobile Public Liability and Property Damane (Owned Cars) Policy Number Insurance Company Term A-846900 AB-289200 AE-192300 AE-768200 AH-244300 AH-710600 Hartford Accident and Indemnity Company Hartford Accident and Indemnity Company Hartford Accident and Indemnity Company Hartford Accident and Indemnity Company Hartford Accident and Indemnity Company Hartford Accident and Indemnity Company 1/1/47-48 1/1/48-49 1/1/49-50 1/1/50-51 1/1/51/52 1/1/52/53 Coverage Third party liability for bodily injury and property damage arising out of the use of listed owned automobiles. Limits; Up to 12/31/51 $5,000 each person, $10,000 each accident for bodily injury; $5,000 each acci dent for property damage. After 12/31/51 $10,000 each person, $10,000 each accident for bodily injury, $10,000 each ac cident for property damage. Automobile Public Liability and Property Damage (Hired and Non-Owned Equipment) Policy Number MS 23357 MS 25930 MS 25995 MS 26485 MS 26798 Insurance Company Sun Insurance Company Sun Insurance Company Sun Insurance Company Sun Insurance Company Sun Insurance Company Term 6/30/47-48 6/30/48-49 6/30/49-50 6/30/50-51 6/30/51-52 Coverage Third party liability for bodily injury and property damage arising out of the use of hired and non-owned automobiles. Limits $100,000 each person, $300,000 each accident for bodily injury; $50,000 each accident for property damage. 13 WAD02033 Policy [Mumber Excess Public Liability and Property Damage Insurance Company Term 48421 67461K) 68636K) 60637K) Lloyd's Lloyd's Lloyd's Lloyd's 12/31/47-48 12/31/48-49 12/31/48-49 12/31/48-49 76627K) 76628K) 76629K) Lloyd's Lloyd's Lloyd's 12/31/49-50 12/31/49-50 12/31/49-50 K5446) K5447) K5448) Lloyd's Lloyd's Lloyd's 12/31/50-51 12/31/50-51 12/31/50-51 CN117052) CN117053) CN117054) CN117055) Lloyd's Lloyd's Lloyd's Lloyd's 12/31/51-52 12/31/51-52 12/31/51-52 12/31/51-52 Coverage Third party liability for personal injury and property damage. Limits: 1947-48 -$ 200,000 1948-51 Incl. -$1,000,000 After 12/31/51 -$2,000,000 This coverage is in amounts in excess of the coverage provided under the pri mary policies including those covering owned and hired automobiles). Fidelity Insurance Bond Number Insurance Company Term 5262954 AS 5340893 AS National Surety Co. National Surety Co. 6/1/45-51 6/1/51-54 Coverage Loss of money or other property caused by dishonesty of any employee(s). Limit: $1,000,000 each loss Flat Premium charged covering all operations. No specific project segregation. 14 WAD02034 Inland Marine-Transportation Insurance Policy Number XPX 723097 1TFX 718442 1TFX 735202 1TFX 718447 CM 15537 Insurance Company National Fire Ins. Co. National Fire Ins. Co. National Fire Ins. Co. National Fire Ins. Co. Lloyd's Ifiim 7/29/48-49 7/29/49-50 7/29/50-51 7/29/51 to 9/1/51 9/1/51 to 7/1/52 Coverage Insured against all risks of loss on material and equipment during transit and loss during loading and unloading including hoisting, rigging, or installation operations, caused by breaking and or parting of tackle and equipment limited to $100,000 in any one casualty. Public Service Company of Colorado, Denver, furnished the following insur ance: Automobile - Fire and Theft (Broad Form) Policy Number Insurance Company Term AN 41705 AN 25299 AN 13496 D184300 D184574 Niagara Fire Ins. Co. Niagara Fire Ins. Co. Niagara Fire Ins. Co. Planet Ins. Co. Planet Ins. Co. 12/4/47/48 12/4/48/49 12/4/49/50 12/4/50/51 12/4/51/52 Coverage Fire, lightning , transportation and theft (broad form). Construction Equipment Policy Number AN 41705 AN 25299 AN-13496 SP 55139 SP 88805 SP 138819 Insurance Company Niagara Fire Ins. Co. Niagara Fire Ins. Co. Niagara Fire Ins. Co. Planet Ins. Co. Planet Ins. Co. Planet Ins. Co. Xerm 12/4/47-48 12/4/48-49 12/4/49- 2/20-50 2/20/50-51 2/20/51-52 2/20/52-55 Coverage Fire, Lightning, derailment or overturning. 15 WAD02035 Fire - Blanket Form fllicy dumber Insurance Company Term 209727 Nat'l Fire Ins. Co. Coverage 100$ of actual cash value at time of loss. 12/1/49-52 Turbine Explosion Efllicy flumb.er 193-4269 Insurance Company The Hartford Steam Boiler Insp. & Ins. Company Term From 10/1/50 Coverage Explosion - Limit per accident $10,000. Excess in amount of $1,500,000 with Lloyd's of London. Boiler and Boiler Piping Explosion Policy Number Insurance Company Term 193-3868 ft If 193-5899 The Hartford Steam Boiler Insp. & Ins. Company It It It It It It It It ft 9/11/50 2/9/51 10/5/51 From 2/1/52 Coverage Explosion - Limit per accident $2,000,000. Organization Ebasco Services Incorporated provided the services of their New York Office design and construction departments, the latter including the services of Mr. R. C. Booth and Mr. F. S. Sawyer as construction managers. The latter re placed the former, who was reassigned to the Project in Greece, on August 31, 1950. The Construction Manager organized the field office staff and exercised general supervision over the entire functions performed by the New York Office engineering and construction staff relative to this project including prepara tions of specifications, outline of proposals, and contracts for field contion and assisted in co-ordinating engineering and purchasing with the con struction program. This service functioned through contact with the following personnel of the Public Service Company; with Mr. M. M. Koch, Vice President Electrical Operations, on matters of policy; with Mr. R. F. Throne, Superin tendent Steam Production, on mechanical construction; with Mr. W. D. Hardaway, Superintendent Hydro-Electrical Production and Transmission, on electrical con struction; with Mr. John Connell, Auditor, on accounting; with Mr. D. P. Roberts, Property Accountant, on cost accounting; and with Mr. Roy T. Blanchard, PurchasAgent and Traffic Manager, on traffic and purchasing. 16 WAD02036 Ebasco supplied the following field personnel: Title Construction Superintendent IVamg A. Snow General Construction Suprvsr, Resident Engineer &nest Bans A. L. Peterson Wm. I. Milburn Construction Accountant M. Whitmore Mechanical Supervisor E. Curtis Mechanical Engineer Bruce W. Bates Asst. Mechanical Engineer L. F. Keegan Boiler Supervisor R. L. Wright Mechanical Inspector Lou J. Poulos Electrical Engineer Electrical Inspector James M. Morris Richard C. Dutton James E. Ratcliff Robert C. Hinsey James S. Marsh Paul M. Brebrick Office Engineer Charles G. Anderson Draftsman Harold L. Rivers, Jr. Robert Crist M. D. VanWormer Cost Engineer Nelson P. Harpold Frank L. Ulmer John E. Walker Charles E. .Lott Stewart Keith Cost Clerk Charles W. ElIson Orrin J. Stransky Lewis A. Cota John D. Norris Benjamin T. Watkins Kenneth N. Kinney David W. Cox Ralph.F. Ostrom Chester R. Dow L. W. McDonough L. R. Bowen Elmer H. Goetzinger 17 Date of Termination April 29, 1949 April 27, 1951 January November 11. 1952 16, 1951 March January March April June December 14, 1952 12, 1951 20, 1951 6, 1951 4, 1951 14, 1951 May April 5, 1950 9, 1951 January September December November 15, 1951 19, 1950 15, 1950 16, 1951 April February November March February October June August December April 21, 1950 20, 1951 17, 1950 23, 1951 22, 1952 19, 1951 11. 1951 3, 1951 7, 1951 11. 1952 WAD02037 Field Engineer Chief-of-Party Junior Engineer Instrument Man Chainman Rodman Field Inspector Nurse Receptionist Purchasing Agent j&m William H. Thomas Emmett J. Connell Joseph Riggs Leo S. Fisher Charles H. Conlin Barton K. Leslie James M. Egan Maynard J. Bonesteel Carleton Whitehead William M. McMecham Allison H. Stocker James Covey Clyde Miller Glen D. Rohlf Palmer H. Moen Hazen H. Hunter Gwinn E. McCuistion Robert C. D'Urso Dudley C. Brewster Alfred A. Covey E. C. Graebing Virgil R. Paine Louis R. Soderburg W. H. R. McCormack Paul H. Miller Frank J. Mclnroy Marion S. Morrison Steven Hordinski Lawrence J. Dolan, Jr, Gerald E. Harnden Robert N. Sailer Gurney Hinshaw Elizabeth A. Clary Kathryn A. Nance Ellen S. Neeley Olive M. Jones Elizabeth M. Lefferdink Samuel F. Wagle Bernice K. Urbanczyk Connie M. Boyer Martin M. Gilbert John W. Johnson Donald P. Durkee J3ate__Qf Termination September 22, 1949 May 12, 1950 November 24, 1950 July October 10, 1951 24, 1951 October September October February May April March July August April December 21, 1948 16, 1949 13, 1949 3, 1950 18, 1951 13, 1951 28, 1952 20, 1951 10, 1951 18, 1952 7, 1951 October February 16, 1951 1, 1952 July 20, 1951 September 27, 1951 June 6, 1951 June September April March April 3, 1949 8, 1949 21, 1950 27, 1950 13, 1951 February 19, 1951 December December June February March September January 26, 1948 29, 1948 24, 1949 1, 1950 31, 1950 30, 1950 15, 1951 April May 15, 1949 19, 1951 18 WAD02038 Jitle purchasing Stenographer Storekeeper Warehousemen Chief Clerk Timekeeper Time Checker Clerk Stenographer-Typist Name Christmar I. Berg Geraldine V. Pettis Lonnie D. Wood Curtis C. Lanphear Edgar H. Hayes Willis E. Tice Joel E. Starnes Ronald A. Lebrecque Rudolph Sams Carl Gagliano Albert H. Stahl Joseph M. Spaulding, Jr. Paul A. Walter James P. Smith Darwin E. Welch Roger 0. Williams, Jr. Joseph G. Keithline Harry R. Mossey Marjorie L. Lindeman William R. Flynn Donald L. Staggs Nona M. Jones William G. Gaiser Morris L. Dennis Vincent J. Poe Raymond C. Wachter Herman Settle George Menzak Leonard Crandall James Drich Shirley E. Kemper Clay W. Ritchey, Jr. Louise Fugate Veronica M. Harrison Sarah Lee Amalia Sivic Kenneth Shaffer H. A. Mereness Ruth M. Webster Ruth J. Riggins Phyllis M. Honea Anne M. Jones Patrick T. Slane Melvin L. Strohmaier Marian L. Atterbury Ruth N. Myers John M. DeGray 19 Date of Termination June March 15, 1951 28, 1952 December 5, 1949 June 30, 1950 August 31, 1950 September 9, 1950 May -11, 1951 November January May 18, 1949 25, 1952 18, 1951 September 1, 1950 January December June June May June February April March 5, 1950 15, 1950 30, 1950 29, 1951 15, 1951 27, 1950 23, 1951 27, 1951 30, 1951 April May September February March December December 13, 1951 16, 1952 25, 1951 1, 1952 28, 1952 19, 1951 19, 1951 February 22, 1952 April May March March April June March July 15, 1949 4, 1951 29, 1950 31, 1950 30, 1951 20, 1950 30, 1951 18, 1950 WAD02039 Title Name Stenographer-Typist (Cont'd) Georgene F. Wragge Ruth F. Sebastian Faith L. Korbelik Barbara Dunmore New York Mechanical Engineer Electrical Engineer Plant Betterment Engineer Cathodic Protection Eng. Accountant Accountant Estimating Engineer Estimating Engineer CONTRACTOR'S PERSONNEL Allis Chalmers Manufacturing Company Dale Perkins P. R. Pollock I. McNiece Apex Wood Products, Inc. P. Korte B & B Engineering & Supply Company M. S. Epperson E. 0. McGraw Babcock & Wilcox Company W. W. Fowler J. Perkins W. B. Beisel C. P. Pearson Diamond Power Specialties Corp. H. E. Curtis C. Robb G. H. Stickford National Boiler Casing Company C. Frost M. Hrubic Date of Termination May 23, 1951 August 16, 1951 January 11, 1952 Robert B. Beers A. W. Huseby John H. Moore John H. Collins A. E. Moyle R. G. Speiker Fenimore Owen Andrew W. Wilcox (Condensers, Units 1 6 2 Transformers, Unit 2) Erector District Manager Service Representative (Lobby Counter) Foreman (Heat Insulation) Superintendent Superintendent (Boiler Units) Erector Erector (Night Shaft) Service Engineer (Units 1 & 2) Service Engineer (Unit 3) (Soot 31owers) Service Engineer Service Engineer Service Engineer (Boiler Casing) Erector Units 1-2 Erector Unit 3 20 WAD02040 Babcock & Wilcox Company (Cont'd) Stearns-Roger Mfg. Company W. Kelly Sturdevant Division of Westinghouse Electric Company J. Baches Bell Plumbing and Heating Company Robert Peterson Guy Wright Byron-Jackson Company A. A. Pechuls W. K. Shone Collier Electric Company M. D. MacGregor G. Rehm 0. Mrsny Colorado & Southern Railway R. F. Harris Realock Fence Division of Colorado Fuel & Iron Company R. A. Sutherland R. E. Bley Combustion Engineering Company, Inc. Fred Howell G. Miller J. H. Hedditch Construction Specialties Company Ray Carson (Refractory) Foreman (Fans) Service Engineer (Station Plumbing) Sales Engineer Foreman (Boiler Feed Pumps) Erector Service Engineer (Electrical Construction) Superintendent Foreman Clerk-Timekeeper (Railroad Spurs) Roadmaster (Fence) Erection Superintendent Asst. Manager (Unit 2 Pulverizers) Erector Erector, after Nov. 28, 1950 Erector-, after April 16, 1951 (Sound Proofing - Control Rooms) Foreman 21 WAD02041 Craftsman Painters and Decorators r. D. Lewis C. McBride D. W. Hamilton Custodis Construction Company, Inc. J. Bond E. Gorelo A. Pouppert Detroit Steel Products Company T. W. Freeman Flexicore Company of Colorado N. Lindquist General Electric Company H. Andrews J. 0. Reichen L. Meade Earl Martin M. I. Cleveland Grinnell Company S. Tiege Kansas City Structural Steel Company John F. Beasley Construction Company C. D. Ratcliff T. C. Koogle & Son George C. Koogle Manning, Maxwell and Moore F. J. Lepres 22 (Painting) Foreman Foreman, after June 5, 1951 Foreman, after Jan. 22, 1952 (Stacks) Erector (No. 1 Stack) Erector (No. 2 Stack Concrete) Erector (No. 2 Stack Lining) (C-Panels) Erector (Roof Slabs) Foreman (Unit 1 & 3 Turbines) Locomotive Service Engineer Erector (Unit 1 Turbine) Start-up Engineer (Unit 1) Erector (Unit 3 Turbine) Start-up Engineer (Unit 3) (Transformers FireProtection) Foreman (Station Building Structural Steel) (Erection) Superintendent (Units 1-2) (Well Drilling) Superintendent (Station Crane) Erector WAD02042 Marley Company r. W. Speer W. E. Grimsley r. Roble McCarty-Johnson, Inc. Agaton Anderson James Fields Minneapolis-Honeywell Regulator Co. D. D. Pearsall R. H. Hillbread Fox Metal Products Corporation K. Sadler McMurtry Manufacturing Albert A. Spenst Merrick Scale Company E. D. Fivecote Midwest Piping and Supply Company I. D. Lehman C. Evans 0. F. Rejholec Otis Elevator Company W. H. Lapean Raymond Concrete Pile Company N. G. Pastore R. R. Moyer L. E. Dock G. J. Higgins Jerry Healy Win. Engelbrecht Wm. Guth John C. Reeves & Company L. A. Bott 23 (Cooling Towers) Erector (Units 1 & 2) Erector (Unit 3) Service Engineer (Heating, Ventilating and Air Conditioning.) Foreman Units 1-2 Foreman Unit 3 (Controls) Service Engineer Service Engineer (Ductwork) Foreman (Window Glazing) Foreman (Coal Scales) Erector (Plant Piping) Superintendent Timekeeper Timekeeper (Elevators) Erector (Substructure Piling) Foreman (Soil Tests) Superintendent (Units 1 - 2-3) Clerk (Unit 1-2) Clerk (Unit 3) Foreman (Unit 1) Foreman (Unit 2) Foreman (Unit 3) (Floor Covering) Foreman VVAD02043 peter ScGricf Inc. (Initial Site Grading) Rondal McGlivery Supervisor R> j. Tipton (Preliminary Surveys) j. Osborn Engineer Webster Engineering Company (Coal Handling System) W. J. Schneider Erector Western Elaterite Roofing Company (Building Roofs) M. E. Wille Foreman Westinghouse Electric Corporation (Unit 2 Turbine-Generator, Condenser & Units 1 & 3 Transformers) W. H. Bagley R. Kaley G. A. Ratcliffe L. Woods Erector (Condenser) Erector (Turbine-Generator) Erector (Turbine-Generator) Service Engineer (Trans formers) W. W. Wilmore Nurseries (Landscaping) S. Wilmore Proprietor MMJEACXURER1 S_BEPSEamEAm.ES The Autocall Company (Annunciators) I. A. Klein F. E. Seaton Representative Service Engineer Automatic Electric Sales Company (Intrasite Telephone) 0. E. Ragsdale Service Engineer Bailey Meter Company (Instruments) A. Danielson L. F. Monohan Service Engineer Service Engineer Edwards Valve, Incorporated (Valves) S. S. Dunn J. S. Weltey Service Engineer Service Engineer Flexicore Company of Colorado (Roof Slabs) G. F. Bettcher Representative 24 WAD02044 Grinnell Company pt w. Menlengracht Leeds and Northrup Company r. l. Wham j. E. Casey Manning, Maxwell and Moore, Inc. F. Redel McCarty-Johnson, Inc. E. L. Potarf W. F. Rogers McMurtry Manufacturing A. G. Barr Mountain States Telephone & Telegraph Company A. W. Frisch L. N. Crispelle Henry Pratt Company R. B. Saar John C. Reeves & Company T. W. Keeton United Conveyor Corporation C. A. Crouch Worthington Pump and Machinery Corporation Ray Keys Fred L. Ellis P. F. Robbins (Transformer Fire Protection) Representative (Instruments) Service Engineer Service Engineer (Valves) Service Engineer (Heating, Ventilating and Air Conditioning) Representative Representative (Window Glazing and Paint) Sales Engineer (Telephone System) Representative Representative (C. W. Valves) Service Engineer (Floor Covering) Representative (Ash Sluicing System) Service Engineer (Compressors) Service Engineer Sales Engineer Sales Engineer 25 WAD02045 88822 88221 <n co CO CO Q CM CM O -O CM O' O -- 3382 CM >0 CM O' CM V CM -< C<3 CO CM CM CM CQ O rtN Jc t- r- ` o ^ o a o O' -4 <M ^ ^ in n n Of' O' O O O' > 4> O' O -4 c m1 in in n E O O' O' O' u 8 C -4 O' o -4 ^ in "4 O O' a 8322 V ^ 8822 --OO O' CM 8 i O O' > --4 --I .o o ^ tj> o o VQ q c- t- CM CM CM -- O CM 38 CM CM CM --. 8 o<-o-om CM 1 u U O' --4 CM o O' O' o o 8 Z e? -4 o- o -4 cm s O' O' O' O' a. ut Js 2 a o m 0-4 "*4 O' O' k. a 6 4> O JB 8 41 O4) t- k 3 JS S -- X aamO'- |-- 88822 8822 OO OQ O o O' O' CM --< 0-000 o- O' ?5 --i o- -h in in -h NO O O -1 _ -4 -4 O Q C5 V 'T rt in > CM CM -4 Q| CJ^ ^ O O' 322 O 8882 CM CM O 382 q r- OO'O^ CM -h - O' t- in CM CM CM c 8822 O' 8 o- o -4 -- CM co 3382 88 8 8 82 -JhOO CM NCO - CM -- TT O' O' --4 -4 -4 O L to CM CM oor* h- CO - M kl 03 O' Q --* CM O^' ^O' O' O' O' O' Q --I CM o1 in n in O' O' O' O' ' O h (M r J O O O O' otp o --i O O' O' 8,, o o cC\* --l I--1 mxF voo O O' O' i^ i O O' > o -4 -4 O' O' 882 8 32 O' O' O' ss -4 -4 -- qq - -4 o r- q -4-4 0 - o oo q qoq 3382 CM CM O CM CM CM -4 CM -4 o O' O' o O' O' 38 82 o TP rp qq CM oo 4J> 'T --4 0 f- qo oo o ooo <r f-- CM rr- in -- -I -- -4 -4 r- o t- -- O' -4 r- 'T -4 --. o -I - -4 r- -4 o t-- nNrt O f-- t-- T 8 -4-4 .6 2 6 566 38 4T rp en o -H .0 0 6 5 .0 0 3 6 .0 0 3 6 .0 1 9 .0 1 9 .0 99 .0 0 5 .101 .0 0 3 .090 .0 0 3 .061 .0 1 0 .050 .0 0 6 o-oooo9g^N ^ v in n n S-4 CM n O' O' O O' O O' O O'O' Q -4 m* in in n 4 --. --. e O' O -4 Om*' Oin' iOn' - Sm a O' O' 4 -4 --. C O' O' O' 4 -4 -4 -4 1946 1949 1950 1951 1952 ad Ir 1946 1949 1950 1951 1952 DC 01 1949 1950 1951 1952 1949 1950 1951 1952 1949 1950 1951 1949 1950 1951 1949 1950 1950 1951 1952 -COO K -- -4QC in o o o -H C-MI --Oi --Oi co o O' --^ 8t-- Sf~- 2 .,8228:2 a, cm cm o 8888: -* o < CM CM o o cmCM -- ?J T ^ O T r*rr ?J -H O 8 8 3S O n-4 n O' CM CM -n tn--.--.f-r--* cm co r- m cm cm cm ta. 44 e Mj Uco c U 14 o l o :S8; cMm* o oM* Ml c 5 41 8 e 41 Z a k 9 -4 X 41 *4 oCM 4> 4 U a. 04 --4 X c 14 a M b i s o 41 u O' o> o --< --. CM O O' o o 'TO o o in cm --. 82 2 O' M* --i CM -4 V CM CM ac ea cu sa a- e u * c o a c 63 as WADQ2046 l'M-1 f0 ebasco services incorporated FINAL FIRE INSURANCE SCHEDULE RE0 r J. M. Spaulding. Jr. Public Service Company of Colorado nnycr- M- Whitmore________ Arapahoe Steam Electric Station honth nr October 1951 1 TEH DESCRIPTION PREV lOUSir REPORTED INCREASE THIS MONTH TOTAL TO DATE PRODUCTION PLANT 2 Fire Protection and Service Water Systems 3 Station Building 6 Fuel and Ash Structures 7 Coal Equipment 9 Boiler Equipment 10 Boiler Plant Auxiliaries 11 Plant Piping 12 Turbogenerator Equipment 13 Condensers and Auxiliaries 14 Turbine Room Auxiliaries 15 Main Sw Control & Protective Equipment 18 Miscellaneous Power Plant Equipment TRANSMISSION PLANT 20 Outdoor Structures 21 Transformer Equipment 22 High Voltage Sw Control & Prot Equipment OTHER 25 Office and Warehouse Building 26 Craft Buildings and Contents 27 Portable Buildings 32 Lumber and other materials on yard 33 Indirects and Overheads Total Project 28,670 1,241,029 111,670 1,077,466 3,244,611 664,817 1,234,657 3,240,068 1,070,111 117,755 972,564 30 350 148 14,695 8,716 (144,798) 23,176 27,031 (11,053) (28,986) 2,180 29,722 87 28,818 1,255,724 111,670 1,086,182 3,099,813 687,993 1,261,688 3,229,015 1,041,125 119,935 1,002,286 30,437 44,656 44,656 446,079 537 446,616 355,103 9 355,112 71,785 2,522 12,266 12,077 3,329,280 17,307,536 (19,634) (98,170) 71,785 2,522 12,266 12,077 3,309,646 17,209,366 WAD02047 SECTION III SPECIFIC HISTORY WAD02048 SECTION III SPECIFIC HISTORY WAD02049 PUBLIC SERVICE COMPANY OF COLORADO ARAPAHOE STEAM ELECTRIC STATION 1950-51 86.000 KW INSTALLATION 1951 44.000 KW EXTENSION SECTION III - SPECIFIC HISTORY STRUCTURES AND IMPROVEMENTS jjgpnVKMENTS TO SITE As this was a completely new project, considerable grading and area pre paration was necessary. As mentioned in the General Feature section of this re port, the site was chosen and purchased as a result of the power supply study made by Ebasco Services and issued September, 1947. Almost at the beginning of the grading, a situation developed which caused considerable legal action. In attempting to level one of the high mounds of earth, there was uncovered on August 24, 1948, what appeared to be an old cemetery containing three skeletons, one adult and two children, which were removed and re-interred in Riverside Ce metery by court order. After this incident, grading continued with good pro gress. The excavation for switchyard foundations was carried on at the same time with the site grading, the excavated material being used as backfill in low areas. Backfill required at a later date around the switchyard foundations was secured from the circulating water tunnel excavation. As the subsurface material consists almost entirely of gravel to a consid erable depth, no great amount of weather surfacing was required; however, the transformer and switchyard areas were surfaced with granite chips for appear ance and improvement to walking conditions. Asphalt topped roads with approxi mately 6" rock base were built as access roads from the South Platte River Drive to the southeast corner of the building (main entrance), thence along the east side of the building to the line of induced draft fans, thence west along the north side of these fans to the west end of the warehouse. In addition to this road, asphalt paving was provided in the area between the induced and forced draft fans at each boiler and from the warehouse to the building along the rail road spur. The entire area blacktopped amounted to approximately 90,000 square feet. Adequate yard drainage facilities consisting of catch basins, manholes, concrete and steel piping were provided where necessary around the building, coal storage and switchyard areas. Shortly after the completion of the grading of the area just outside and along the east wall of the offices, an attempt was made to landscape this space by planting shrubs and flowers, but due either to the lateness of the season, or poor planting, these died, but were replaced at no additional cost by the nurseryman the next spring, 1951. Further landscaping was not begun until the spring of 1952, when planting of trees between the cooling towers and the South jatte River Drive was done to prevent vapor from interfering with motor vehicle driver's visibility. Also, shrubs and other plants were planted along the entrance road. WAD02050 Considerable fill was required to provide sufficient elevation to bring in ,ke railroad spur track and to provide track storage without undue grades. AproXimately 152,375 cubic yards of earth fill was used and 8961 feet of track laid from the northwest entrance gate to and beyond the track hoppers in four tracks. Included in this line of tracks are two spurs, one through the turbine rooo between Units 2 and 3, and one to the east side of the pump house. 2396 feet of additional railroad track was built in two tracks along the west site fence as part of Unit No. 3 extension, making a total of 11,357 linear feet of railroad track within the site fence. The entire site area of approximately 58.5 acres was fenced during the very early stages of construction. Ten thousand feet of fence material was purchased on local order SD-15, which provided also for erection on a footage basis when required. In February, 1952, it became necessary to close out the 0ld order and issue a new order (SD3939) because of increased costs of material and labor; therefore, the fence purchased for and erected around the building was at an increase of slightly over 5%. Yard lighting was provided for the immediate areas surrounding the plant, for the cooling tower area, coal storage area, the switchyard area and the main entrance roadway. High boulevard standards using mercury vapor lanps were used for roadway lighting. Flood lights were also used to advantage at strategic points on building and structure roofs. These lighting facilities consisted of various types of fixtures furnished on orders NY-77124, 77156, 77196 and 77198 and installed as described below. The station area roadways are lighted by 15 standards and two sets of dou ble flood light standards. The roadway lights consist of General Electric Com pany No. 79D, 400 watt mercury vapor lamps with General Electric harp to brack ets, form 830, and No. 207 globes, set on Pfaff and Kendall Catalogue No. C-395 standards, each 33' 3" high. The two track hopper standards each consist of one 1000 watt and 750 watt flood light fixture with wide beam reflectors, Crouse Hinds type ADE-16, Catalogue No. 42742 plain lens. Concrete enclosed ducts were installed underground for use by the Bell Telephone Company in providing outside telephone services to the plant site. These ducts provided entrance to the site from both the north and south property lines and terminated at the building wall from whence the circuits were contin ued in steel conduits to control rooms No. 1-2, and 3. Fire protection in the yard area consists of 15 strategically located fire hydrants. Eleven hydrants,located in the cooling tower, coal handling, and transformer areas are 6" pipe size with one 4%" pumper connection, and two 2%" hose connections. Four hydrants located in the switchyard area are 4" pipe size with two 2J" hose connections. Hydrants in the cooling tower area are tapped direct from the incoming 12" city water main, thereby eliminating the fire pump feature from them. All other hydrants are tapped from the 8" fire protection ring header that makes a complete loop inside the station building. Fourteen fire hydrants were purchased from the R. D. Wood Company on NY-77120, and three from the Board of Water Commissioners, City and County of Denver, on local or ders SD-752 and SD-1552. A fire pump, purchased on NY-77165, is provided to assure ample water pressure at all times, being controlled by a pressure switch tapped into the fire protection ring header. Also, a fire truck pumper connec tion is provided at the east wall of the station building in case of complete Power failure. 2 MNJAD02051 A private 8 inch sanitary sewer was constructed from the plant site, north no South Lipan Street to West Evans Avenue, tying in at that point to an ex ting private sewer of the D. C. Burns Realty and Trust Company. Local order 5jj0j -8a0n wwaass issued to the W. G. Rhodus Company to furnish all labor and material price basis of $1.70 per foot fo>rr 8 inchf pipe and $1.40 per foot for 4 inch pipe.' Manholes, of which 13 were conissttrruuctetd, were priced at $155.00 each. Work started on the sanitary sewer November 4, 1948, and was completed November no 1948. During construction of the discharge tunnel for the No. 3 cooling tower, it was determined that sewer manhole 10 would interfere with the tunnel. Local*construction forces relocated manhole 10 and also ran the 4 inch sanitary ewer to the crusher house from manhole 11. Temporary toilet facilities for Construction forces were provided by a 4 inch line from manhole 12 to the temporary c. onstruc+tioAnM of^fi1cAeA . AA fieal1dJ 4toA iil1et wasl.Mt a aa1lsaoA *tieAdJ 2intoA AthL iisA TliJne_ . Service Water System (Outside) The securing of a water supply in the state of Colorado is rather unique in that it is one of only four states whose entire water supply was subscribed to and granted as early as 1850, so that at this date the only way water can be obtained is to either buy existing rights or buy water from those holding these rights. Considerable care must be exercised in securing either water or rights as apparently more rights have been granted than there is water to fulfill these rights. This makes rights valued in the order of standing and also it makes water available in the same order; therefore, it is possible to secure rights, but no water. The city water supply was brought in from the north property line in a 12 inch pipe to a meter located at the ground floor of the building, just east of column line 6 and south of column line G. An underground extension to this line was installed along the north side of the building to Unit 3 for future installation of metering facilities. A deep well was drilled in an attempt to reach a 1700 foot depth but just before this depth was reached the casing collapsed and this drilling was aban doned; however, two other deep wells were completed, one to a depth of 700 feet, and the other to a depth of 1700 feet. A deep well pump was purchased from the Layne Western Company for the 1700 foot well, but was not installed because suf ficient water was obtained from the other sources. These two deep wells are capped for future use. Two shallow wells and three river wells were provided which now supply all of the service and make-up water required for the three units. Shallow well pump No. 1 of 850 gpm capacity, is provided with 30 hp mo tor driver, and shallow Well Pump No. 2, of 700 gpm capacity, is provided with a 15 hp motor driver. The river wells, each of 1,000 gpm capacity, require 20 hp motor drivers. The shallow well pumps were supplied by Layne Western Company on order NY-77102 and were first placed in service in August, 1950. Two of the river well pumps were furnished by Layne Western Company on order NY-77102 and were placed in service on December 1 and 2, 1950. The third river well pump was furnished by the Layne Western Company on order NY-77518 and was placed in service on November 16, 1951. Some difficulty was encountered in ob taining sufficient water from the river wells through the original casing, and it was decided to add a collector piping system into the river. This added feature consisted of approximately 120 feet of 36" perforated concrete pipe laid in a horizontal position several feet below the surface of the river bed 8nd extending from the wells 94 feet west to center-line of manhole, and then 36 feet south, of which 21 feet is perforated pipe and 15 feet is Massey type 3 WAD02052 fibbing and 10" minimum rock fill to center of river. piping from all wells was brought underground to the pump house where the ter discharged into a large sump from which it was pumped into the plant ser*?ce water system by three service water pumps. Two service water pumps were j stalled for the original construction. These pumps, each with a capacity of 9 000 gpm cold water against a total dynamic head of 100 feet, were furnished ^orthington Pump and Machinery Corporation on order NY-7742 and went into eration in October, 1950. A third service water pump (having the same capa?ty) was furnished by the same vendor on order NY-77486 for installation with 3, This third pump was placed in service on November 7, 1951. Inside of the pump house and east of the service water pumps a control panel was located which contained the controls for well and service water pumps for Dnits 1 and 2. Also included on this panel were necessary gauges and instruments for these unips. A second similar panel was installed adjacent to and north of the orig inal panel for mounting controls and instruments for service water pump No. 3 and future pump No. 4. Service water piping, for all Units, between the pump house and station building* is grouped in a common trench approximately 25 feet north of the East West Base Line. One ten inch line is provided for Units 1 and 2 and a second ten inch line is provided for Unit 3 and future Unit 4. Service water for hydrogen and lube oil cooling is a "closed" system and is returned through an 8" line under pressure, to the circulating water system intake tunnel at the acid and chlorine feed pit. All other Service Water used as cooling water is an "Open" system. Funnels are provided in the discharge piping at the various pieces of equipment to allow visual checking of water flow, and hand testing of temperatures. The water is returned to the circulat ing water pump pit by gravity through a slightly pitched 10" line, entering at the southeast corner of the circulating water pump pit at elevation 5257'-0". A six inch line running from the city water main in the station building to the pump house, provides emergency circulating water makeup. The line leaves the station building 9'4" east of column line 3 and follows the service water piping to the pump house. Ereetion of Service Water Piping in the Pump House area started May 10, 1950, in order to take advantage of previous excavation required for Pump House construction. Piping from the Pump House Area to the Station Building started June 26, 1950, and was completed August 15, 1950, for Units 1 and 2. Unit 3 Service Water Piping was run from the Pump House to Column Line 5 along with (Jnit 1 and 2 piping in order to use the same trench excavation. The remainder of the Unit 3 Service Water piping was started July 12, 1951, and was completed August 7, 1951. Station Building Excavation for the building foundation for Units 1 and 2 was started on September 29, 1948. Work was stopped shortly afterwards, however, pending a change in basic foundation design from a mat type to piling. With a decision reached to use piling, excavation work commenced again January 31, 1949, and was completed March 18, 1949, with 4650 cubic yards excavated. Backfill to top of pile caps which was completed on February 16, 1951, amounted to approximate ly 3750 cubic yards. The installation of piling for Units 1 and 2 was started 4 WAD02053 ary 31, 1949, and completed April 7, 1949, by the Raymond Concrete Pile ^Sn under Order NY-7741. 562 step taper piles averaging in length from 25 Company anc| containing a total of 512 cubic yards of concrete were in- Ml ing for supporting the turbine pedestal Nos. 1 and 2ves installed sta he same time. The placing of concrete pile caps began April 19, 1949, and at 1 omplete<* 1^49, with a total of 667 cubic yards of concrete. Base s c or building columns for Units 1 and 2 were set and grouted between July6** 1949' and August 5* 1949 Excavation for the building foundation for Unit No. 3 was started on ary 8, 1950, and completed on February 16, 1950, with 2250 cubic yards ex* ated. Backfill to top of pile caps which was completed on July 13, 1951, caVunted to approximately 1860 cubic yards. The installation of piling for Unit 2 3 by the Raymond Concrete Pile Company under Order NY-77409, was started ^February 28, 1950, and completed April 7, 1950. 289 step taper piles aver- nillq in length from 25 feet to 35 feet and containing a total of 252 cubic ^rds of concrete were installed. Piling for supporting the turbine pedestal No. 3 was installed at the same time. The placing of concrete pile caps began Aoril 21, 1950, and was completed August 26, 1950, with a total of 289 cubic vards of concrete. Base plates for building columns for Unit No. 3 were set and grouted between August 10, 1950, and September 1, 1950. Reinforced concrete grade beams were installed between column foundations for supporting and providing finished appearance for the insulated steel "C" panel building enclosure. These grade beams extended under the west temporary wall and around machine shop and boiler areas. In addition concrete walls were built along the east and south sides from substructure depth to 10 feet above grade for appearance and to support the brick walls above elevation 5272. The station building for all three units consists of thirteen bays, each of 24 feet, making a total building length of 312 feet. The width of the build ing, 140*6", is comprised of a turbine bay 40 feet wide between columns A and B, of a bunker bay 42 feet wide between columns B and D, and a firing aisle 10 feet wide between columns D and E. Additional areas, such as the switchgear rooms, fan rooms number 2 and 3, and the machine shop, are located between boilers, thus utilizing available space for station auxiliaries and eliminating a con ventional auxiliary bay. Structural steel framing for the station building was furnished by the Kansas City Structural Steel Company on order NY-7731 for Units 1 and 2, and on order NY-77408 for Unit 3. Erection for Units 1 and 2 was by Kansas City Structural Steel Company who, in turn, sub-contracted to John F. Beasley Con struction Company, and was started on August 24, 1949, and completed on December 19, 1949, with approximately 1260 tons of steel set. Erection of steel for Unit 3 was by Ebasco forces, and started on August 31, 1950, and was completed on June 29, 1951, with approximately 750 tons of steel set. Miscellaneous steel for stairways, platforms, etc., was furnished on NY-77113 for Units 1 and 2 and NY-77442 for Unit 3. This miscellaneous steel aggregated approximately 14.4 tons for each unit. Hand railing is of 114 inches steel pipe, all welded construction, using weld pipe fittings for turns and angles. Material was furnished fabricated by United Steel and Iron Works Company on Order NY-77125 for Units 1 and 2 and on Order NY-77443 for Unit No. 3. Some additional handrailing was purchased fab ricated on local orders. All erection was by Ebasco forces. Erection was 5 WAD02054 arted shortly after the first setting of stairways and walkways and continued throughout the construction period as needed. Reinforced concrete floors of 9 inch thickness were placed throughout the tire building enclosure at the ground level in which were built the necessary en rete trenches for running the ash sluice piping and the pyrite piping around c coal mills. All of these trenches were provided with angle iron framework 1 a checker plate covers. Sumps were provided on the ground floor for instal^"tion of sump pumps, one each in the center of each group of pulverizers. Floor drainage boxes with necessary piping to sumps were provided at necessary points in the ground floor. Spacious office, locker, laboratories, first aid and conference rooms were rovided at the east end of the main building. These rooms occupied two floors in a space 24'-0" feet wide by 83'-6J" long. A ladies toilet was provided on the first floor. Toilet facilities were also provided in the chief engineer's office, and shower baths and toilet facilities were provided in the second floor locker room. A small area was provided for a kitchen in which a sink was in stalled with room for range and refrigerator to be installed at some future date. The east and south walls of the building above elevation 5272' are buffcolored brick. The laying up of these brick walls was started on November 21, 1949, for Units No. 1 and 2, including the offices, and was completed on April 2i, 1950. Brick walls for Unit No. 3 were started on November 14, 1950, and completed on March 9, 1951. Ebasco forces were used in this work, which in cluded the laying of glass blocks for windows in the south wall at elevation 5316 and 5338. Parapet walls with precast concrete coping were built along the east and south roof lines. All partition walls in the office area are of plas ter finish and the ceilings are a suspended type with plaster finish and flush type fluorescent lighting fixtures. In an effort to make the control room rea sonably soundproof, hollow glazed tile was used for its outside walls. In this tile wall along the south side is inserted thermopane windows to enable the operators to see into the turbine room. The ceiling is covered with soundabsorbent celotex and the side walls from about one-half way up to the ceiling are covered with perforated transite with accoustical material backing. A spe cial drop ceiling of plastic material similar in shape to egg crating is sus pended beneath the fluorescent lighting fixtures both for diffusion of light and aiding in preventing sound reverberations. For all outside walls which are not brick, insulated steel panels are used. These panels are made up of *18 USS gage steel plate with about 3 inches of insulation and are approximately 18 inches wide by 10 feet long. They are welded to an angle iron framework, except the temporary west end of the turbine room where they are bolted. These panels were furnished by Detroit Steel Products Company oh Order NY-77107 for Units 1 and 2, and NY-77444 for Unit 3. Reinforced concrete floors are at elevation 5287 (turbine operating level) , at 5302 (evaporator level), at 5315 (deaerator level), and 5341 (shuttle coal conveyor level). The turbine operating floor is made up of three parts, each of approximately 7265 square feet for Units 1, 2 and 3. These areas include portions of the bunker bays between column lines B and D. The floors at the evaporator level for Units 1, 2 and 3 cover three areas of approximately 1978 square feet each. The floor at the deaerator level for Units 1, 2 and 3 also covers three areas of approximately 1402 square feet each; and the floor at the shuttle conveyor level covers an area of approximately 7066 square feet total area for Units 1, 2 and 3. In addition to these areas, there are, between WAD02055 boilers, two floor areas at elevation 5287, of approximately 3271 square feet ,each, on which are located the switchgear rooms for Units 1 and 2, 3 and 4 and three areas at elevation 5302 of approximately 816 square feet each on which the air conditioning and ventilating equipment is located for Units 1, 2 and 3. fhese latter are designated as fan rooms 1, 2 and 3. Floor grating was installed at elevations 5287', 5402*, 5317.33', 5328.17', 5325.42' in the building, which include walkways leading out to the turbine room roof. This grating was furnished by Blaw-Knox Company on Order NY-77114 for Units 1 and 2 and NY-77431 for Unit 3. All stair treads and nosings were of cast "Feralun" type and were furnished by the American Abrasive Metals Company 0n Order NY-77115 for Units 1 and 2, and NY-77432 for Unit 3. The turbine opera ting floor area bounded by columns A1-B1-B9 and A9 which is essentially for Units 1 and 2, is surfaced with approximately 2 inches of cement topping which includes 2 feet square by 1/2 inch deep imbedded aluminum frames, gray masterplate finish steel trowelled and waxed to a polish. This topping, except for waxing which was done by Ebasco forces, was furnished and applied by John C. Reeves and Com pany on local order SD-2867. The turbine floor area for Unit 3, which is bound ed by columns A9-B9-B14-A14, is surfaced by 8"x8"x)" thick cement tile of gray color to match the surface of Units 1 and2, and was furnished and installed by John C. Reeves and Company, on Order SD-4147. Asphalt tile floor covering was installed in the offices, control rooms, and on the observation platform in the east end of the turbine room at elevation 5302.02'. Approximately 7522 square feet of asphalt tile was installed for the three units, which was furnished by John C. Reeves and Company on local orders SD-2043 for Units 1 and 2, and SD2706 for Unit 3. Precast concrete slabs, 6 inches thick by 12 inches wide and ranging in length from 6 feet to 12 feet, were installed as the base roof material. These slabs were anchored to the building steel and supported the built-up 20-year bonded roof which consists of five layers of 15 pound felted roofing paper with gravel topping. The precast slabs were furnished by Flexicore Company of Colo rado on order NY-77106 for Units 1 and 2 and NY-77463 for Unit 3. Cast in place concrete roof slabs were installed over the switchgear and fan rooms for all units. The built-up roofing was furnished and applied by Western Elaterite Roof ing Company on local orders SD-1659 for Units 1 and 2, and SD-2696 for Unit 3. Approximately 38,817 square feet of this built-up roofing was applied to the three units. The major portion of the hinged doors was of the hollow metal type and furnished by the Richmond Fireproof Door Company on order NY-77167 for Units 1 and 2, and NY-77482 for Unit 3. Rolling doors were installed in the wall at eachcondenser, in the north and south walls at the railroad track, and in the north wall of the pump house. These doors were furnished by the R. C. Mahon Company on order NY-77123 for Units 1 and 2, and NY-77441 for Unit 3. Steel sash is of the Fencraft intermediate projected type with outside glaz ing. Approximately 2246 square feet of window sash were furnished for Units 1 and 2, and 730 square feet for Unit 3, by the Detroit Steel Products Company on order NY-77161 for Units 1 and 2, and NY-77466 for Unit 3. Glazing for all windows, including the thermopane glass for the main en trance and control rooms, was furnished and installed by the McMurtry Manufac turing Company on local orders SD-1623 for Units 1 and 2, and SD-2957 for Unit 3. 7 WAD02056 The station crane was installed immediately upon its arrival on October 6, 2^949. It is a Shaw Box Type "S", four motor, electrically operated, with main hook of 100 tons and auxiliary hook of 10 tons capacity. It was furnished by Maiming * Maxwell and Moore Inc. on order NY-7748, and was placed in operation November 2, 1949, for use for construction purposes. Ruildinos A reinforced concrete, brick and steel structure was built to house the circulating water and service water pumps. Also included in this building are rooms for circulating water treating equipment and gas metering equipment. This structure, designated generally as the pump house, is 47'-OJ6" wide by 70'-3" long with an addition on the west side of 25*-0J" by 29'-3" which isolates and houses the gas metering equipment. Glazed tile partitions inside the pump house proper provide individual rooms for separating the various types of water treat ing methods. A large room in the northeast corner is used for chlorine cylinder storage. Two smaller rooms in the southeast corner are for acid, polyphosphate, and chlorine-treating equipment. The portion of this building which houses the circulating water and service water pumps is built over the well section of the circulating water tunnels. Steel beams are installed for supporting the roof which has precast concrete slabs as a base for the built-up 5-ply 20-year bond ed roof. A lighting panel with necessary conduit, wiring, and fixtures is in stalled to provide general and specific lighting service. Unit heaters are in stalled for building heating. This building, including all its services, was built by Ebasco forces start ing on March 22, 1949, and finished on February 1, 1952. Rolling doors and con ventional type doors, steel window sash, heating units, lighting fixtures, roof ventilators and built-up roofing were furnished by the same vendors and on the same orders as similar equipment for the main building. Description of the various pieces of equipment contained within this building is expanded under the appropriate heading for each service under the general head of Condensers and Auxiliaries. Fuel and Ash Structures An appropriate structure was required to house the various pieces of coal crushing equipment. Therefore, a building was erected 27'-2" by 25'8" by 53'-4" high, with concrete foundations and floors, structural steel framing, insulated steel panel siding, precast concrete roof base with built-up roof, and necessary lighting, heating and toilet facilities. Very little excavation was required for the crusher house and this was done along with site grading. 28J cubic yards of concrete had been placed for the foundation mat when it was discovered that it was 4 feet off proper location. This concrete was removed and formwork and placing of reinforcing steel was started again on February 23, 1950, and 6% cubic yards of concrete was placed therein, completing the mat on March 1, 1950. Formwork, reinforcing steel and 4 cubic yards of concrete were placed for the column footings on March 3, 1950. Steel erection was delayed because of late delivery; however, erection began on June 9, 1950, and was completed on August 10, 1950. All of the structural steel, window sash and reinforcing steel for floors, was furnished by the Webster Manu facturing Company as part of their coal-handling equipment on order NY-7768. The lighting, heating, ventilating, toilet facilities and "C" panel siding were 8 WAD02057  hed by the same vendors and on the same orders for similar equipment supfurni- for the main building. All erection and installation was by Ebasco forces. P BOILER PLANT EQUIPMENT iH^lino Equipment A complete integrated coal handling system is installed for removing coal oBI cars, transporting to yard storage or to bunkers, via conveyor belts. This stem, which included coal crushing and screening, was designed and furnished Webster Manufacturing Co. on order NY-7768, and erection was by Ebasco forces under the direction of a Webster Manufacturing Company's supervisor. The system is arranged essentially as follows: A two track hopper pit lo cated north of the station building contains four hoppers, three under the south track and one under the north track. Two hoppers contain reciprocating plate feeders and two contain apron conveyor feeders. All feeders discharge into a central hopper from which coal drops onto a 42-inch belt conveyor No. 2 carry ing coal to the crusher house. The head pulley of No. 2 belt is of the magnetic type to take out tramp iron. The coal drops off the head pulley into a series of chutes controlled by flapper gates. The coal is either directed onto revers ible cross conveyor No. 5 depositing either east or west to storage or continues down through the crusher and screen to 36-inch belt conveyor No. 3 traveling up to the station building. The bunker filling system is located on elevation 5342 in the main building and consists of a traveling shuttle on which is mount ed a 36-inch reversible shuttle belt No. 4 discharging either east or west onto reversible wing conveyors 4A and 4B which empty into the bunkers. Four bunkers of the "silo" type, each of 240 tons capacity serve each boiler. The initial capacity of the coal handling system is 300 tons per hour. Provision has been made to increase this to 600 tons per hour by increasing the speed of all con veyors at some future date. A merrick Weightometer is furnished and mounted on belt conveyor No. 3 to measure tonnage handled into the bunkers only. Work began on the track hopper November 1, 1949, with machine excavation. Excavation was carried on intermittently due to bad weather through this period until completed February 10, 1950. Hand excavation began on this date. Differ ent soil conditions were encountered than anticipated and excavation was halted until an investigation could be undertaken. After investigation, construction was released as planned with the concurrence of the Client's engineers, and ex cavation was resumed March 3, 1950, and completed for forming March 10, 1950. Erection of forms and placing of reinforcing steel for the base slab of the track hopper began on March 10, 1950, and was completed with 56 cubic yards of concrete placed therein on March 17, 1950. Formwork, placing of reinforcing steel and placing of concrete continued on the upper portions until completed on August 26, 1950, with 385 cubic yards of concrete placed. Conveyor No. 2 tunnel leading up from the track hopper was excavated in conjunction with the track hopper. Formwork and placing of reinforcing steel began August 23, 1950. The first concrete was placed the following week and continued being placed until completion on September 30, 1950, bringing the total concrete for the tun nel to 232& cubic yards. To facilitate erection, conveyor gallery steel was assembled on the ground ln as long lengths as fabrication and handling permitted. Assembly of this steel started on June 8, 1950, and with erection, continued until completed on September 23, 1950. A number of miscellaneous items of steel were omitted to 9 WAD02058 rmit the installation of Machinery, which started early in August. On Septem ber 13. 1950, Webster Manufacturing Company's erection supervisor arrived on the job to supervise final setting and alignment of machinery and to put the equip ment into operation. Work continued on concrete slabs, gallery walls and roofs, crusher house siding and other structural features which could not be started until after the machinery was in place. A considerable period of adjustment was required for all conveyors and crusher house equipment. Conveyors No. 2 and No. 5 were first operated on October 18, 1950, together with the four feeders. Coal wasunloaded to storage October 19, 1950. Conveyor belt No. 3, shuttle conveyor No. 4, and wing conveyor No. 4A were first operated on November 10, 1950, for filling the bunkers for Units No. 1 and 2. From the bottom of the coal bunkers raw coal is fed through piping down to the coal feeders located on the turbine operating level. These coal feeders, furnished by Babcock and Wilcox for Units 1 and 3 and by Combustion Engineering for Unit 2, are designed to work in conjunction with the coal mills andfeed sufficient coal to satisfy the mills, which are of the ball type for Units 1 and 3 and are Raymond Bowl Mill type for Unit 2, and each having a capacity of 16,800 lbs. per hour. Tempering air is supplied through ducts from the air pre heater to the primary air fans, which in turn supply air to the mills and the coal piping to the burners. One set of 4 pulverizers including feeders, controls and piping were sup plied for each boiler. Those for boilers 1 and 3 were furnished by Babcock & Wilcox on orders NY-773 and NY-77402 respectively. Those for boiler 2 were furnished by the Combustion Engineering Company on order NY-7727. There are two 18" pipes from each coal mill.for supplying pulverized coal to the burners for Units 1 and 3, and one 22" pipe from each coal mill for sup plying pulverized coal to the burners in Unit 2. These pipes reduce to 14" for all three units at the burner operating level. Ash Disposal Equipment To provide for the removal and handling of ashes, a complete sluicing sys tem was installed for all units. This system consisted of two vertical sluice pumps installed on a concrete foundation located in the sluice pond east of the plant; necessary piping from these pumps to the several boiler ash hoppers and hydroveyors and return to the pond; ash hoppers, including clinker grinder, hy draulically operated lifting doors, sluice trough, jet nozzles, internal water piping and refractory lining; hydroveyor exhausters; necessary piping from hydroveyor exhausters to mud drum hopper, to dust collector hopper, and to stack hopper; and control panels with switches, gages, etc., mounted thereon. All of this equipment and material except sluice pumps was furnished by the United Conveyor Corporation on order NY-7766 for Units 1 and 2 and on order NY-77415 for Unit 3. The ash sluice pumps are 7 stage vertical turbine type pumps each capable of handling 1,000 gpm sandy cold water against a total dynamic head of 340 feet with minimum submergence of 1 foot above lowest impeller and driven by a 100 hp, 3 phase, 60 cycle, 1800 rpm, G. E. drip-proof motor, furnished on or der NY-77102 by Layne-Western Company. These pumps are mounted on two wells of 48" perforated concrete pipe sump to a depth of 30 ft. or el. 5224.5. A coarse rock fill surrounds these wells and a concrete and steel walkway and platform provide access from the pond bank. Installation of the ash sluicing equipment was begun 10 WAD02059 ,, May 21, 1950, and completed on December 15, 1950, for Unit 1, on May 8 1951 for Unit an<* n December 1951 for Unit 3. pjjnr Equipment The steam generators are Babcock and Wilcox special three-drum sterling voe with tubular air heater and submerged attemporator steam temperature con trol* purchased on order NY-773 for Units 1 and 2, and NY-77402 for Unit 3. fas and Pulver*ze<l coal are fired together or separately, down between the roof ueS. Each boiler is capable of evaporating continuously 450,000 pounds of Mater per hour. The boiler manufacturer supplies all appurtenances, including aUtoaatic Diamond air soot blowers, gages, water columns, safety valves includ ing Consolidated power control valve, complete setting with steel casing, two Induced and two forced draft fans per boiler, air preheater, air and gas ducts, dust collector, breeching to I. D. fans and all insulation and lagging. A two stage superheater is supplied with each boiler. Superheat is main tained at 905 F., between 290,000 pounds per hour and 480,000 pounds per hour Mjien the boiler is supplied with 408 F. feed water by means of two submerged attenporators located in the mud drum. A portion of the steam passing from the rimary to the secondary superheater is directed through the attemporators by two proportioning valves controlled by Bailey air power drives furnished as part of the combustion control equipment. The forced draft fans are of B. F. Sturtevant Manufacture, type 135 TV, capable of delivering 100,000 cfm, 105 F. air against 11.8 inches of water, test block conditions. Each fan is driven by a 300 hp, 1160 rpm, 2300 volt, 3 phase, 60 cycle Allis Chalmers splashproof motor and is controlled by inlet and outlet vanes driven by Bailey air power drives furnished as part of the com bustion control equipment. The induced draft fans are of B. F. Sturtevant Manu facture, type 1010 TVID double inlet, capable of delivering 173,500 cfm, 380 F. air at minus 12.8 inches of water, test block conditions. Each fan is driven by a 700 hp, 705 rpm, 2300 volts, 3 phase, 60 cycle Allis Chalmers splashproof motor and is controlled by inlet vanes and outlet dampers, each driven by Bailey air power drives furnished as part of the combustion control equipment. The principal data on the steam generators are as follows: a. Boiler water-heating surface, excluding water-cooled furnace surface------------------------------------------------------------------------------ 25,299 sq. ft. b. Superheating surface ----------------------------------------------------- 19,800 sq. ft. c. Water cooled furnace projected area --------------------------- 7,794 sq. ft. d. Air heating surface------------------------------------------------------- 118,370 sq. ft. e. Attemporator surface ----------------------------------------------------- 1,026 sq. ft. f. Furnace volume---------------------------------------------------------------- 41,900 cu. ft. g. Heat release per cubic foot of furnace at maximum load---------------------------------------------------------------------------------- 13,500 btu Motors for driving all boiler auxiliaries were furnished by Allis Chalmers Manufacturing Company on orders NY-779 for Unit 1, NY-7724 for Unit 2 and NY-77411 for Unit 3. All equipment, gages, controllers, transmitters, etc., for combustion and feed water control systems were furnished by the Bailey Meter Company on order 11 WAD02060 ST5 for Units 1 and 2 and NY-77451 expanded under the appropriate for Unit heading. 3. Description of this equip- Excavation for boiler foundations for Units 1 and 2 was started October 1, Work was stopped shortly afterwards, however, pending a change in basic foundation design from a mat type to piling. With the decision reached to use iling. excavation work commenced again on February 25, 1949, and was completed Lrch 25, 1949, with 656 cubic yards excavated. Excavation for boiler No. 3 !!as started on February 15, 1950, and was completed on February 16, 1950, with 426 cubic yards excavated. Piling for boilers 1 and 2 foundations was started February 14, 1949, along the"E" column line and was completed on March 11, 1949, with 101 piles driven for boiler No. 1 and 101 piles for No. 2. Driving was in termittent during this period as boiler piling was driven in conjunction with the station building piling. Piling for boiler No. 3 foundation was started Harch 3, 1950, and completed March 17, 1950, with 101 piles driven. These pil ings were also driven in conjunction with the station building for Unit 3. placing of concrete for pile caps for boilers 1 and 2 began May 20, 1949, and was completed June 10, 1949, with a total of 257 cubic yards placed. Placing 0f concrete for pile caps for boiler No. 3 began April 21, 1950, and was com pleted July 28, 1950, with a total of 122 cubic yards placed. Base plates for boiler structural steel were set and grouted during the following periods: for boiler No. 1, the week of July 25, 1949; for boiler No. 2, the week of August 1, 1949; and for boiler No. 3, the week of December 13, 1950.' Boiler structural steel erection by Ebasco forces was started and com pleted in the following sequences: For boiler No. 1, started on August 15, 1949, and completed on September 30, 1949; for boiler No. 2, started on August 26, 1949, and completed on December 2, 1949; and for boiler No. 3, started on December 26, 1950, and completed on February 23, 1951. Riveting was included in this erection; however, some miscellaneous steel, such as walkways and stair ways was erected later. The Babcock and Wilcox erection superintendent arrived on the job Septem ber 12, 1949, and a few days later received and started placing the rigging for hoisting boiler drums. The uptake steam drum for boiler No. 1 was raised to place October 11, 1949; the main steam drum, October 18, 1949; and the mud drum, October 31, 1949. The uptake steam drum for boiler No. 2 was raised to place December 1, 1949; the main steam drum was raised to place December 5, 1949; and the mud drum December 21, 1949. The uptake steam drum for boiler No. 3 was raised to place February 26, 1951, the main steam drum February 28, 1951, and the mud drum March 26, 1951. The installation of water wall headers and tubes for boiler No. 1 was begun on October 24, 1949, and completed including super heater tubes, on June 30, 1950. Similar work for boiler No. 2 was begun on June 1, 1950, and completed on February 1, 1951, and that for boiler No. 3 was started on March 2, 1951, and completed on August 31, 1951. Hydrostatic test at 1575 pounds for 8 hours were completed on July 1, 1950, for boiler No. 1, on February 2, 1951, for boiler No.2, and on September 9, 1951, for boiler No. 3. Dryout and boilout of boilers consumed approximately 8 to 10 days per boiler, and was accomplished during the periods September 7, 1950, to September 15, 1950, for boiler No. 1, February 17, 1951 to February 28, 1951, for boiler No. 2, and October 21, 1951, to October 31, 1951, for boiler No. 3. The blow ing out of main steam lines and the setting and testing of safety valveswere completed on September 30, 1950, for boiler No. 1, on March 11, 1951, for boiler No,2, and on November 10, 1951, for boiler No. 3, after which each of the boilers was ready for load, which was placed on boiler No. 1 on October 7, 1950, 12 WAD02061 boiier ^* ^ 0n ^arc*1 1^, 1951, and on Boiler No. 3 on November 16, 1951. e first loads were, of course, comparatively small. However, they were in cased from tlme t0 t:lme as t*le turbine and boiler were in condition to accept increased load. Each boiler is provided with a fully automatic, sequential type soot blow. system. The soot-blowing equipment was manufactured by the Diamond Power fecialty Corp. and furnished by the Babcock and Wilcox Company under orders ^v,,773 and NY-77402. Blowing equipment for each boiler consists of twenty A2E otary type and four IK retractable type blowers installed in the boiler, plus 2 straight line type installed in the airheater. Two of the A2E rotary type blowers were added to each boiler after initial operation and were furnished by the Diamond Power Specialty Corp. under order NY-77526. Blowing and control air is provided by three air compressors furnished by the Worthington Pump and gachinery Corporation under Orders NY-7714 and NY-77423. Compressors are 15/6 X 12, type DC-2, horizontal, duplex, two stage, double acting; each direct con nected to a 150 HP, 300 RPM, 3 phase, 60 cycle, 2300 V, synchronous motor. Blowing air is stored in a primary air receiver at 500 psi, then reduced to 365 pSi through a pressure reducing valve and stored in a secondary air receiver until used in the soot-blowing cycle. Control air is taken from the 365 pound blowing air through pressure reducing valves to two control and one driving sys tems; the control system for the IK blowers operates at 100 psi and the control system for the A2E blowers operates at 40 psi and the driving air system for all drivers operates at 250 psi, making the entire soot-blowing system dependent only on its own compressors. The primary and secondary air receivers were furn ished by Graver Tank and Manufacturing Company, Incorporated, on order NY-7778. The primary air receiver is 72" I. D. X 24'-6" long end to end of heads, with a shell thickness of 1-15/32", complete with necessary nozzles and mounting pads. The secondary air receiver is 48" I. D. X 7'-3" long end to end of heads, with a shell thickness of 11/16", complete with necessary nozzles and mounting pads. Erection of the soot blowers in the boilers and the installation of control tubing was accomplished during the last phase of boiler erection due to the need of a completed boiler casing in order to hang the control tubing alongside the boiler. Operation of the soot blowers on Unit *1 during the winter of 195051 proved the necessity of weather protection for the IK retractable type soot blowers due to icing up of the equipment. A protective housing of sheet alum inum was therefore provided on each side of all three boilers for each pair of IK type blowers. From the induced draft fans a steel breeching, 16 feet by 7 feet, carries flue gas to the stack for each boiler. This breeching with supporting steel for Units 1 and 2 was furnished by the American Steel and Iron Works on order NY- 77158, but was erected by Ebasco forces. Insulation was furnished and applied by B & B Engineering Company on order NY-77163 and lagging of 20 gage sheet met al was furnished and applied by National Boiler Casing Company under direct con tract with B & B Engineering Company. The installation of Unit No. 1 breeching was started on June 30, 1950, and completed, including insulation and lagging, on September 5, 1950. Similar work for Unit 2 was started October 10, 1950, and completed on January 25, 1951. Breeching of the same size was furnished for Unit 3 by the same company, but on order NY-77487. Erection by the Ebasco forces was started on March 16, 1951, and completed, including insulation and lagging, on November 2, 1951. Insulation was furnished and applied by B & B Engineering Company on order NY-77504 and lagging was applied by National Boiler Casing Company under direct contract with B & B Engineering Company. 13 WAD02062 Stack No. 1, serving boilers 1 and 2, is of reinforced concrete construcstanding 250* above elevation 5262. It includes an independent free hard burned radial brick lining for the full height with an inssiide si.aeter of 13'-10". The inner lining is separated from the concrete stack by diaDlntiiatiorl space. A steel beam supported brick baffle wall divides the low* ^ortion of the stack lining at the breeching openings. A concrete-lined hopet ^is provided at the stack bottom for collection of fly ash. This hopper is Pef .ed via vacuum line into the boiler fly ash system. Stack No. 2 serving e0P\eT No. 3 and future boiler No. 4 is also 250' high, but is 14' internal diabo1 Excavation for Stack No. 1 was begun on March 31, 1949, and completed on 2( 1949. The driving of piling by Raymond Concrete Pile Company on order vY-774l'was started on April 12, 1949, and completed on April 18, 1949, with 97 s driven to a depth ranging from 32.5 to 36.2 feet. Excavation for stack Pu 2 was begun on March 30, 1950, and completed on March 31, 1950. The driv- of the 91 pile furnished by Raymond Concrete Pile Company on order NY-77409 s started on April 3, 1950, and completed on April 10, 1950, with piles driv^ t0 a depth ranging from 31.5 to 36.1 feet. The building of forms and place" 0f reinforcing steel for the foundation base of stack No. 1 was completed on July 15, 1949, and 323 cubic yards of concrete were placed therein. The olinth for this foundation was formed and reinforcing steel was placed complete on July 1* 1949* 48.5 cubic yards of concrete were placed in this form July 19, ^949. The building of forms and placing of reinforcing steel for the foundation base for stack No. 2 was completed on August 21, 1950, and 327 cubic yards of concrete were placed therein. The plinth for this foundation was formed and re inforcing steel was placed complete on August 26, 1950. 43.5 cubic yards of concrete were placed in this form August 29, 1950. The erection superintendent, Mr. J. Bond, for Alphons Custodis Chimney Con struction Company, arrived on the job August 12, 1949, and began immediately the erection of Stack No. 1, (order NY-7746), which was accomplished in approximate ly 10 foot lifts. Construction continued with approximately three lifts per week for the first three weeks increasing to a maximum of 5 lifts the sixth week. The outer concrete shell was completed, except for trim, on October 4, 1949. The brick lining was started on October 18, 1949. About 40 feet of tile was laid per week in the first few weeks, increasing to nearly 60 feet per week until the lining was completed on December 7, 1949. Miscellaneous trim was in stalled, completing Stack No. 1 on December 14, 1949. Mr. E. Gorelle, erection superintendent for Custodis Construction Company Incorporated, arrived on the job May 14, 1951, to start erection of stack No. 2. Good progress was made, averaging approximately 3 lifts of 10 feet each per week to August 17, 1951, at which time the outer concrete shell, except for trim, was completed. At this time, Mr. A. Pouppert replaced Mr. Gorelle as erection superintendent. Work started immediately .on the construction of the tile lining. About 40 feet of tile was laid per week, increasing to 50 feet per week near the half-way mark. Completion of the lining and the placing of the top trim was accomplished on October 12, 1951, thus completing stack No. 2. The combustion control equipment was furnished by Bailey Meter Company on order NY-7770 for Units 1 and 2 and order NY-77451 for Unit 3. These orders inolude instruments and controllers required for automatic control of the boilers. Also included are all boiler and turbine gage boards on which are mounted a con siderable portion of the control devices for the combustion control system. "*s system is of the master pressure type biased by a steamflow/airflow meter 8n" a gasflow/airflow meter. Also included are furnace draft controller; inUced draft flow limit control; windbox to furnace to burner ratio controller; 14 WAD02063 element steam temperature controller-recorder based on steam temperature 3 j steam flow; a complete three element feed water control system based on n level, steam flow and water flow; and the various remote devices such as 101 damper and vane drives, attemperator valve drives, primary air damper drives, fan control valve and feed water control valve. The automatic gas shutoff valve, 98Ruagles-Klin9eman' was also furnished as part of the combustion control equip- 3 This system functions to trip all gas fuel supply on (a) loss of induced derBa-f*' fans to or both furnace forced draft fans, (b) loss of furnace draft, (c) loss differential, or (d) loss of gas pressure when burning of gas. ^nflso provides a timer to release fuel circuits only after a sufficient purge 0Itf athe boiler. Gage boards were received completely piped and wired with the majority of the instruments mounted. Instruments not supplied by Bailey Meter Company, but irtich were shipped to Bailey for mounting included gages on order NY-7796 to Manning, Maxwell and Moore Company, temperature recorders on order NY-77100 to Leeds and Northrup, all for Units 1 and 2 and instruments on order NY-77485 to Manning, Maxwell and Moore and recorders on order NY-77454 to Leeds and North rup for Unit 3. Boiler gage board No. 1 and common gage board were set on June 20, 1950; boiler gage board No. 2 was set on October 27, 1950. Boiler gage board No. 3 and common gage board for Unit No. 3 were set on September 28, 1951. Work con tinued on each of these boards until the trial operation date of each boiler. All boilers were operated remote manual during the first few months of operation for all units. Considerable adjustments, tests and settings were required after operation date before these boilers could be put on automatic control which was released on June 22, 1951, for Unit 1, April 20, 1951 for Unit 2, and February 1, 1952 for Unit 3. Rfliier Plant Auxiliaries The feedwater cycle for each unit is entirely separate, operating with no interconnections except for stored condensate and evaporator makeup. Five ex traction points are utilized on each turbine. These serve one high-pressure heater, one intermediate high-pressure heater with evaporator take off, one de aerating heater, one intermediate low-pressure heater and one low-pressure heat er. The points are numbered respectively as follows: For the General Electric Units 1 and 3 - 4th, 7th, 12th, 15th, 18th stages, and for the Westinghouse Unit 2 - 7th, 15th, 22nd, 26th and 29th stages. The heaters and other equipment were bought identical for all units as the pressures and temperatures of the corresponding stages are identical. All extraction heaters were purchased from Struthers Wells Corporation for Units 1 and 2 on order NY-7728 and for Unit 3 on order NY-77422. The three higher stage shells are vertical, headup, with a two-foot section below the tubes for a hotwell. The low pressure heaters are horizontal and mounted in the condenser neck to shorten piping and to conserve space. 15 WAD02064 principal data for the heaters including operating dates are as follows: Fourth Stage - Dnits No 1 & 3 --S_eyenth Stage - Unit No. 2 effective heating surface ^lu^es65 Tube Material feedwater Flow Temperature Rise Tube Design Shell Design fourth Stage - Unit 1 Seventh Stage - Unit 2 Fourth Stage - Unit 3 sq. ft. in. - Bwg Cupro - nickel lbs/hr Degrees - "F" psig - "F" psig - "F" Placed in operation Placed in operation Placed in operation 1211 224 5/8 - 16 70-30 402,700 347.9 - 400.2 1800 - 450 400 - 750 October 19, 1950 March 24, 1951 November 30, 1950 Seventh Stage - Units No. 1 & 3 --Fifteenth Stage - Unit No. 2 Effective heating surface - sq. ft. Number Tubes Size Tubes -in. - Bwg Tube Material - Cupro - nickel Feedwater Flow - lbs/hr Temperature Rise - Degrees - "F" Tube Design - psig - "F" Shell Design - psig - "F" Seventh Stage - Unit 1 - Placed in operation Fifteenth Stage - Unit 2 - Placed in operation' Seventh Stage - Unit 3 - Placed in operation 1140 224 5/8 - 16 70-30 402,700 291.6 - 347.9 1800 - 400 250-800 October 19, 1950 March 16, 1951 November 30, 1951 Fifteenth Stage - Units No. 1 & 3 Twentv-sixth Stage - Unit No. 2 Effective heating surface Number Tubes Size Tubes Tube Material Feedwater Flow Temperature Rise Tube Design Shell Design Fifteenth Stage - Unit 1 Twenty-sixth State-Unit 2 Fifteenth Stage - Unit 3 sq. ft. in. Bwg Arsenical Copper lbs/hr Degrees - "F" psig - "F" psig - "F" Placed in operation Placed in operation Placed in operation 1014 163 5/8 - 18 333,200 168.6 - 233.4 190-300 75-300 October 17, 1950 March 16, 1951 November 30, 1951 Eighteenth Stage - Units No. 1 & 3 Twentv-ninth Stage - Unit No. 2 Effective heating Surface - sq. ft. Number Tubes Size Tubes - in. Bwg Tube Material - Arsenical Copper Condensate Flow - lbs/hr Temperature Rise - Degrees - "F" 16 1214 145 5/8 - 18 300,000 111.6 - 168.6 WAD02065 Eighteenth Stage - Units No. 1 G- 3 (Cont.) -Twenty-ninth Stage - Unit No. 2 Tube Desi?n,, a Design S?!hteenth Stage - Unit 1 i9ntv_ninth Stage-Unit 2 IShtJenth Stage - Unit 3 psig - "F" psig - "F"Hpt. Placed in operation Placed in ODeration 190-300 50 - 300 October 7, 1950 Marchl6, 1951 November 17, 1951 The deaerators and their storage tanks were furnished by Worthington Pump d Machinery Company on order NY-777 for Units 1 and 2 and on order NY-77426 for Unit 3. They are of the horizontal type mounted on a horizontal storage tank* Each deaerator was furnished with the usual accessories including gages, age glasses, thermometers, alarms and a Bellfield automatic overflow valve. 2hey are designed to deaerate 400,000 pounds per hour to a residual oxygen con tent of .005 cubic centimeters per liter. Steam for this purpose is taken from tl,e twelfth stage bleed of turbines 1 and 3 and from the twenty-second stage bleed of turbine No. 2. Drains from the two high pressure heaters and from the evaporator coil also enter the deaerator adding to the heat effect. The storage tank has an approximate capacity of 110,000 pounds which gives approximately 16J minutes capacity at normal delivery to the feedwater pumps. The two storage tanks for Units 1 and 2 were raised and set on the steel November 25, 1949, and the storage tank for Unit 3 was set February 20, 1951. The storage tanks were used throughout the initial boilout of each boiler to supply the boiler feed pumps. Steam was introduced into Unit 1 deaerator on October 7, 1950, into Unit 2 on February 17, 1951, and into Unit 3 on November 16, 1951. An evaporator is furnished for each unit and each is equipped with an in dependently mounted preheater. Order NY-7730 placed with the Griscom-Russell Company covers both evaporators and preheaters of Worthington Manufacture for Units 1 and 2 and Order NY-77414 with the same company covers the evaporator and preheater of Worthington Manufacture for Unit 3. Each evaporator was furnished with all appurtenances such as gages, water glasses, level controller, Bellfield control valve, blowoff valve, alarms, and thermometers. Each evaporator is fed with softened city water, and is designed for a net vapor output of 13,-500 pounds per hour with total solids in vapor leaving the shell limited to 1.7 ppm when solids in shell water is limited to 3250 ppm. Steam is fed to the coils from the seventh stage bleed on Units 1 and 3, and from fifteenth stage bleed on Unit 2 at a maximum pressure of 149 psig. The evaporators are of the bent tube design with provision for cold water scale cracking. Evaporators No. 1 and 2 were set November 23, 1949, and evaporator No. 3 was set February 23, 1951. The evaporator preheaters, one for each of the evaporators described above, are of the deaerating typedesigned for shell pressure of 75 pounds and coil pressure of 150 pounds. Each preheater is guaranteed to heat up to 20,000 pounds per hour of 100% raw water from 70 F to saturated temperature of steam at operat ing pressure of 45 psig, with effluent oxygen content not exceeding .03 cubic centimeters per liter. The placing in service of all evaporators was delayed because of press of other work and also the need of them was not urgent. Evap orator No. 3 with its preheater was placed in service on September 25, 1952 and Evaporators No. 1 and 2 with their preheaters were placed in service on October 27, 1952. Water is supplied to each boiler by three 70% capacity Byron-Jackson 3 inch ^ 10 inch nine stage, type HSB, double case boiler feed pumps. These pumps are capable of delivering 260,000 pounds per hour of 285 p feedwater against a 17 WAD02066 I dynamic head of 2900 feet. A complete spare rotor was purchased for use any one t*le n^ne Pumps. All pumps were furnished with Republic automatic in irculating control which is actuated by main flow, to bypass through silenre orifice to the deaerator at 23,000 pounds per hour, which is considered the c?ni0um safe operating design for each pump. During normal load operation two 5 are utilized per unit. Pymps for Units 1 and 2 were furnished by Byroniclcson Company on order NY-7716 and for Unit 3 by the same company on order iv-77403. Eah PumP is driven by an Allis Chalmers 600 hp, 2300 volt, 3600 rpm, i nhase, 60 cycle, drip-proof motor, furnished on orders NY-779 for Unit 1, mv_7724 for Unit 2 and NY-77411 for Unit 3. The date of operation for each of these pumps is as follows: BF Pump 1A BF Pump IB BF Pump 1C BF Pump 2A BF Pump 2B BF Pump 2C BF Pump 3A BF Pump 3B BF Pump X 9-15-50 9-13-50 9-12-50 2- 5-51 2- 7-51 1-27-51 9- 7-51 9- 7-51 ll-X-51 The reason for the unusual lapse of time before pump 3C was placed in oper ation was due to electrical failure of the motor on pump 2C some months after installation and which was replaced with the motor from pump 3C which had not been installed complete at that time, After rewinding the motor from pump 2C it was installed on pump X rather than move both motors since both were of the same size and characteristics. Stored distilled water is pumped from the condensate storage tank and the deaerator heater storage tank by either of two type 2J6/2CNE-82 centrifugal con densate transfer pumps, furnished by Worthington Pump and Machinery Corporation on order NY-7742 for Units 1 and 2, and NY-77456 for Unit 3. Each pump is de signed to deliver 50,048 pounds per hour of 100 F water at 275 feet, total dy namic head, with 0 feet submergence. Piping between condensate transfer pumps and condensate storage tanks is such that either pump can be used for either Unit 1 or 2. A similar arrangement is made for the condensate transfer pumps for Unit 3 and future Unit 4. Each pump is driven by an Allis Chalmers 40 hp, 440 volt, 3 phase, 60 cycle, 3600 rpm, drip-proof motor. The condensate transfer pumps also serve as boiler cold fill pumps. The pumps for Units 1 and 2 were run initially on 9-12-50, 10-5-50, and for Unit 3 on 11-9-51. Makeup water is pumped from the evaporator preheater into the evaporator by either of two type 1%> CNE62 centrifugal evaporator feed pumps furnished by Worthington Punqj and Machinery Corporation on order NY-7742 for Units 1 and 2, and NY-77456 for Unit 3. Each pump is designed to deliver 32,500 pounds per hour of 50-75F water at 150 feet total dynamic head, with 55 feet submergence. Each pump is driven by an Allis Chalmers 5 hp, 440 volt, 3 phase, 60 cycle, 3600 rpm, drip-proof motor. Each unit is provided with two low pressure drip pumps for discharging con densed steam from the low pressure heater drip receiver into the condensate pip ing ahead of the intermediate pressure heater. These pumps also handle con densed steam from the intermediate pressure heater and from the trap after the deaerator heater reducing station, which steam is flashed into the low pressure 18 WAD02067 tank* with the residual water entering the pump suction piping together flask joW pressure heater drip. These low pressure heater drip pumps, size Kith *, an(j typ6 horizontal centrifugal were furnished by Worthington Pump and 2*^YleTy Corporation on order NY-7742 for Units 1 and 2 and NY-77456 for Unit ltocThese pumps are designed to deliver 46,015 pounds per hour of 175 F water 3> an feet total dynamic head, with 14 feet submergence. Each pump is driven at 3 A.mllies Chalmers 20 hhDp,. 440 volt,. 3 phase, 60 cycle, 1750 rpm, drip-proof bf a" These pumps for Unit 1 were first operated on October 7, 1950, for Unit 1951, and for Unit 3, on November 11, 1951. Each unit is provided with two high pressure drip pumps, for discharging densed steam from the high pressure flash tank into the deaerator. These c" aiso handle condensed steam from the evaporator coil, the 7th stage heat^ shell, and from traps before and after the high pressure reducing stations. These pumps, furnished by Worthington Pump and Machinery Corporation on orders L,7742 for Units 1 and 2 and on NY-77456 for Unit 3, are horizontal centrifu1 2-HL-IO, designed to deliver 75, 024 pounds per hour of 275 F water at 70 feet total dynamic head, with 30 feet submergence. Each pump is driven by an Allis Chalmers 5 hp, 440 volt, 3 phase, 60 cycle, 1740 rpm, drip-proof motor. These pumps were first operated on October 17, 1950, October 18, 1950 for Unit i on March 23, 1951, July 16, 1951, for Unit 2, and on January 7, 1952, Novem ber 30, 1951, for Unit 3. Two condensate storage tanks each of 10,933 gallons capacity are furnished for each two units. These two tanks are connected in such a manner that they can be used in common or as individual tanks for supplying water to the conden sate transfer pumps. Water from these tanks also is fed to the condenser hot wells and is automatically controlled by water elevation in the deaerator stor age tank. Boiler water, deaerator, and gland seal tank overflow drain into these tanks together with the condensate pump discharge. These tanks were furn ished by Eaton Metal Products Company on order NY-7779 for Units 1 and 2, and on order NY-77434 for Unit 3. After treating the inside surface of these tanks with special paint furnished on order NY-77489 by the Amercoat Corporation, they were placed in operation on September 12, 1950, for Units 1 and 2 on November 4, 1951, for Unit 3. The high and low pressure flash tanks were furnished by Midwest Piping and Supply Company on their piping contract covered by order NY-7721 for Units 1 and 2, and NY-77407 for Unit 3. The high pressure flash tanks are designed to withstand 200 psi pressure at 360 F temperature and are of 25.7 cu. ft. capa city. The low pressure flash tanks are designed to withstand a pressure of 150 psig at 360 F and are of 10 cu. ft. capacity. Feedwater flow to each boiler is regulated by a Bailey three element con trol system, consisting of an air actuated piston regulating valve, the position of which is determined from a controller responding to a steam flow, water flow, and boiler drum level. This equipment was furnished by Bailey Meter Company on order NY-7770 for Units 1 and 2, and NY-77451 for Unit 3. These orders also cover the combustion control equipment described previously. Two boiler blow-down tanks were furnished, one for Units 1 and 2 by Graver Tank and Manufacturing Company or order NY-7778, and one for Unit 3 by Stearnsjtogers Manufacturing Company or order NY-77513. These tanks are 52" I.D. by T'6" long and are designed for 750 psig at 510 F and were provided with a sub stantial concrete foundation. Drain from No. 2 tank connects to the drain from 19 WAD02068 fl)0# i which extends on into the ash sluice pond to the east of the plant. The tank for Units 1 and 2 was placed in operation September 16, 1950, and that far ynit 3 on December 1, 1951. Two automatic steam pressure reducing stations were furnished by Fisher Governor Company for each unit, the four for Units 1 and 2 on order NY-7777, and the two for Unit 3 on NY-77481. One reducing station is designed for re ducing saturated steam from 1010 psig to 155 psig with stable operation through out a flow range from 0 flow to 30,000 pounds per hour. This reducing station jS a 2" x 3" type 4100 DR 461-567, 900 pound RF cast steel and is used to sup ply lw pressure steam to the evaporator shell and to the second reducing sta tion. Also for No. 1 unit only it supplies steam for a third reducing station iriiich in turn supplies steam for the office and locker room heating system. The second reducing station is a 2" type 4100 DR 555 T 150 pound RF cast steel for reducing saturated steam from 155 psig to 5 psig with suitable operation throughout a flow range from 0 flow to 5500 pounds per hour and is used to sup ply low pressure steam to the deaerator. The reducing station provided for a portion of the plant heating is a 2" type 4100 DR 555 T 150 pound RF cast steel for reducing saturated steam from 155 psig to 30 psig with stable operation throughout a flow range from 0 flow to 7500 pounds per hour. There is only one of these stations which was furnished by Fisher Governor Company on order NY7777. All of these reducing stations are automatic air operated and provided with travel indicator, valve positioner, pilot tube, bypass and valves, gages and air filter set. They were placed in operation almost immediately after each boiler went into operation, except the reducing station for plant heating which went into operation on January 19, 1951. A sodium zeolite water softener was provided for each unit by the Permutit Company on order NY-7759 for Units 1 and 2 and on order NY-77499 for Unit 3. These water softeners were located on the ground floor in the areas between boilers. They each have a vertical tank of 42 inches diameter by 5 feet high with shell design of 7100 psig working pressure and having a capacity of 50 gpm, based on a total hardness of 7 grains per gallon. Included with each zeolite tank is one 24 inch diameter by 48 inches high brine measuring tank and one 36 inch diameter by 48 inches high salt storage tank all complete with interconconnecting piping, control valves, and chemicals. In addition to the zeolite water softener, chemical treating equipment for boiler water was furnished by Hilton Roy Company on order NY-7760 for Units 1 and 2, and NY-77498 for Unit 3 and future Unit 4. Storage tanks for these sys tems were furnished on local orders SD-1750 for Units 1 and 2, and SD2875 for Unit 3 and future Unit 4 by Eaton Metal Products Company. The chemical pumps consist of one model MD 1-52-45-T Simplex with adjustable variable capacity up to 8 gph with discharge pressure at 1500 psig and suitable for pumping disodium phosphate solution, and driven by a 3/4 hp, 440 volt, 3 phase, 60 cycle, dripproof master gear head motor; and one model MD 1-24-36 Simplex pump with adjust able variable capacity up to 3 gph with discharge pressure at 100 psig and suit able for pumping sodium sulphite solution and driven by a 1/4 hp, 440 volt, 3 phase, 60 cycle, G. E. integral gear motor. The phosphate pump discharges di rectly into the boiler drum and the sulphite pump discharges into the line from the deaerator storage tanks to the Boiler Feed Pumps. Station power piping was furnished, facricated, and erected by Midwest Piping and Supply Company, Inc., on order NY-7721 for Units 1 and 2, and on W-77407 for Unit 3. High pressure piping was substantially all welded. Su perheated steam piping was fabricated from seamless chrome-moly tubing, and 20 WAD02069 ally all other major piping is of seamless carbon steel tubing. Where eSSC"red by code, preheating and stress relieving of welded joints was accom- hv means of resistance type electrical heating coils which wrap around pweld and conduct controlled heat-liSea 3 , j______i_______J..-*________*_____li.j u._x to the weld, Individual temperature>.______________..________ the . -tVSlVcwwecr*e6 m--a--i-n--t-a---i-n--e--d- ---f-o---r---e--a--c--h- *--p--r--e--h--e--a---t-e--d- --a"nd---s--t-r--e--s--s- ---re-li-e-ved weld" *fo"*r "submi-s- for approval by the Hartford insurance inspector. Both shop fabrication s*!Tfield welding and fabrication was also inspected and approved by the Hart- 3,1 insurance inspector. The certification of qualified electric welders for high pressure piping was furnished by Midwest Piping and Supply Company, ttllS High pressure cast steel valves were furnished by the Chapman Valve Manu- InC`uri,,g Company on order NY-7756 for Unit 1, NY-77144 for Unit 2, and NY- --413 for D0*1 Low pressure cast steel and bronze valves were purchased a number of vendors on several New York orders which are easily identifi- hle in the list of New York orders shown in a following section of this report. The erection superintendent for Midwest Piping and Supply Company arrived on he jb on December 12, 1949, and started immediately on the piping erection rich continued without undue interruption or unusual events throughout the con traction of the three units. Power piping was essentially completed for each s it shortly after these units went into operation or approximately on October 7 1950, for Unit 1, March 30, 1951, for Unit 2, and November 15, 1951, for Unit 3* The piping erector departed from the job on February 20, 1952. Heat insulation for all piping, vessels, ducts, etc., is a Phillip Carey product and was furnished and applied by the B & B Engineering and Supply Com pany, Inc., on orders NY-77163 for Units 1 and 2, and NY-77504 for Unit 3. The Installation for Units 1 and 2 was on a unit price measured basis for piping and lump sum prices for vessels and ducts. The installation for Unit 3 was on a lump sum firm price for all piping, vessels, ducts, etc. The furnishing, erecting and dismatling of scaffolding was included in these prices, All can vas covering was glue sized to provide a sealed body for finished painting. The erector arrived on the job on February 22, 1950, and began work immediately with a small crew which later was expanded into an average crew of about 12 men. The essential work for Units 1, 2 and 3 was accomplished in time to meet the trial operation date for each unit; however, quite a number of details were com pleted after these dates bringing the completion date of the application of all heat insulation to March 7, 1952, on which date the erector departed from the job. 21 WAD02070 TURBINEGENERATQR UNITS r^rial Foundations Each turbine generator unit is supported by a specially designed reinforced concrete foundation or pedestal which in turn rests upon step taper concrete piles, and is completely independent of the station building. The piles were furnished and driven by the Raymond Concrete Pile Company on orders NY-7741 for Units 1 and 2 and NY-77409 for Unit 3. The driving of these piles was carried 0n in conjunction with those driven for the various footings or foundations of the station building, including about 18ft of the piles for future Unit No. 4 pedestal which were driven at the same time as those for Unit 3. Approximately 08 piles averaging in length from 25 feet to 35 feet and containing a total of 80 cubic yards of concrete were installed for each pedestal. Reinforced con crete mats were placed on the piles bringing the top elevation of these mats to 5258.0. Approximately 280 cubic yards of concrete were placed in these mats. Turbine pedestal No. 1, containing 54.5 tons of reinforcing steel and 503 cubic yards of concrete, was started on July 28, 1949, with reinforcing steel, and completed except for floor finish and machine grouting on October 6, 1949. Ped estal No. 2, containing 52.4 tons of reinforcing steel and 501 cubic yards of concrete, was started on October 7, 1949, with similar reinforcing steel and completed on April 7, 1950. Work on Pedestal No. 2 was intermittent during the winter because there was no urgency for this pedestal and it could be used as a fill in during inclement weather when outside work was somewhat inactive. Ped estal No. 3, containing 49.3 tons reinforcing steel and 522 cubic yards of con crete, was started on September 28, 1950, with similar reinforcing steel and completed on January 12, 1951. The grouting of turbinegenerator units and the floor finish on the pedestals were accomplished at much later dates. The tur bine pedestal finish for each unit was completed with the turbine room floor as described under the building portion of this report. Turbine Generator Equipment Turbine generator No. 1 furnished by General Electric Company on order NY-771 and erected by Ebasco forces under the supervision of a General Electric Company erector consists of an ASME-AIEE preferred standard hydrogen cooled con densing unit, 40,000 kw rated turbine, 44,000 kw maximum turbine, .85 pf, 900 F normal at throttle, exhausting against 2.5" hg backpressure, at 3,600 rpm. Ex traction steam for feed water heating is taken from the turbine at the 4th, 7th, 12th, 15th and 18th stages. Generator has capabilities of 44,000 KW at .85 pf and .5 psig hydrogen pressure to 48,000 KW, .85 pf at 15.0 psig hydrogen pres sure, at 13,800 volts, 1968 amperes, 3 phase, 60 cycle, 0.8 short circuit ratio. Direct connected exciter with pilot exciter is rated 145 KW at 250 volts and 4 KW at 250 volts respectively. The hydrogen cooling system including a sealing oil system consists of re servoir, decontamination and vacuum tanks, pumps, electrical controls, safety interlocks and alarms. A control panel, housing the hydrogen pressure and pur ity indicators and alarms, is set up on the turbine operating floor near the turbine generator unit. Hydrogen pressure on the turbine and system is main tained at one-half pound gage pressure; however, this pressure can be raised to i5 pounds if desired. In connection with this hydrogen system a C02 auxiliary system is maintained for the purpose of removing and replacing the hydrogen gas 1 the generator. Also this CO2 may be used for generator fire protection. 22 WAD02071 The generator is equipped with four hydrogen coolers, using service water as the cooling medium. Accessories with the turbine generator unit include an oil reservoir of 2175 gallons capacity, two full duty Andale enclosed type oil coolers using service water as the cooling medium, shaft driven centrifugal main oil pump, turbine driven auxiliary oil pump, motor driven emergency bearing oil pump, motor driven turning gear and turning gear oil pump, motor driven vapor ex tractor, oil operated stop valve, complete oil operated control system includ ing operating and emergency governors and vacuum and overspeed trip control, atmospheric blowout diaphragm on low pressure casing, eccentricity, vibration, and valve position recorders, GFA-4 voltage regulator, motor driven main exditer rheostat with high speed contactors, pilot exciter rheostat, generator neutral grounding transformer with resistor and a full complement of lubricat ing oil piping, pressure gages, and thermometers. The lubricating oil, hydro gen and gland seal piping was furnished by the General Electric Company, but mas installed by the Midwest Piping and Supply Company as part of their plant piping contract with Ebasco Services, Inc. Erection of turbine generator No. 1 was started October 19, 1949. The generator stator was set in place Nov ember 3, 1949, using the station crane. No unusual difficulty was encountered during the erection of this unit; however, a two shift erection period was con ducted between July 17, 1950, and September 23, 1950. Steam was admitted to the lead piping for blowout purposes on October 1, 1950, and was admitted to the turbine for the first time on October 1, 1950. Turbinegenerator Unit No. 2 furnished by Westinghouse Electric Corporation on Order NY-772, and erected by Ebasco forces under the supervision of a West inghouse Electric Corporation erector consists of an ASME-AIEE preferred stand ard hydrogen-cooled condensing turbine generator unit, 40,000 kw rated turbine, 44,000 kw maximum turbine, .85 pf, 900 F normal at throttle, exhausting against 2.5" hg. back pressure at 3600 rpm. Extraction steam for feed water heating is taken from the turbine at the 7th, 15th, 26th and 29th stages. Generator has capabilities of 44,000 kw at .85 pf and .5 psig hydrogen pressure to 48,000 kw, .85 pf at 15.0 psig hydrogen pressure, at 13,800 volts, 1968 amperes, 3 phase, 60 cycle, 0.8 short circuit ratio. Direct connected self air-cooled exciter with pilot exciter is rated 155 kw at 250 volts and 2.5 kw at 250 volts respec tively. The hydrogen cooling system including a sealing oil system consists of re servoir, decontamination and vacuum tanks, pumps, electrical controls, safety interlocks and alarms. A control panel, housing the hydrogen pressure and pur ity indicators and alarms, is set up on the turbine operating floor near the turbine generator unit. Hydrogen pressure on the turbine and system is main tained at one-half pound pressure; however, this pressure can be raised to 15 pounds if desired. In connection with this hydrogen system a COo auxiliary sys tem is maintained for the purpose of removing and replacing the hydrogen gas in the generator. Also, this CO*) may be used for generator fire protection. The generator is equipped with four hydrogen coolers, using service water as the cooling medium. Accessories with the turbine generator unit include an oil reservoir of 2000 gallons capacity, two full duty shell type oil coolers using service water as the cooling medium, shaft-driven centrifugal main oil pump, turbine driven auxiliary oil pump, motor driven emergency bearing oil pump, motor driven turn ing gear and turning gear oil pump, motor driven vapor extractor, oil-operated 23 WAD02072 stop valve, complete oil operated control system, including operating and emer gency governors and vacuum and overspeed trip control, atmospheric blowout diaghragm on low pressure casting, eccentricity, vibration and valve position re corders, B J-30 voltage regulator, motor driven main exciter rheostat with high c eed contactors, pilot exciter rheostat, generator neutral grounding trans former with resistor and a full complement of lubricating oil piping, pressure atjes, and thermometers. The lubricating oil, hydrogen and gland seal piping g furnished by the General Electric Company, but was installed by the Midwest Piping and Supply Company as part of their plant piping contract with Ebasco Services, Inc. Erection of Turbine Generator No. 2 was started on October 21, 1950. The generator stator was set in place October 26, 1950, using the station crane. Steam was admitted to the lead piping for blowout purposes on March 16, 1951, and was admitted to the turbine for the first time to carry load on March 17, 1951. Turbinegenerator Unit No. 3, furnished by General Electric Company on Order fjy_7740l, and erected by Ebasco forces under the supervision of a General Elec tric Company erector, consists of an ASME-AIEE preferred standard hydrogencooled condensing turbine generator unit, 40,000 kw rated turbine, 44,000 kw jaximum turbine, .85 pf, 900 F normal at throttle, exhausting against 2.5" hg back pressure, at 3,600 rpm. Extraction steam for feed water heating is taken from the turbine at 4th, 7th, 12th, 15th and 18th stages. Generator has capa bilities of 44,000 kw at .85 pf and .5 psig hydrogen pressure to 48,000 kw .85 pf at 15.0 psig hydrogen pressure, at 13,800 volts, 1968 amperes, 3 phase, 60 cycle, 0.8 short circuit ratio. Direct connected exciter with pilot exciter is rated 145 kw at 250 volts and 4 kw at 250 volts respectively. The hydrogen cooling system including a sealing oil system consists of resevoir, decontamination and vacuum tanks, pumps, electrical controls, safety interlocks and alarms. A control panel, housing the hydrogen pressure and pur ity indicators and alarms, is set up on the turbine operating floor near the turbine generator unit. Hydrogen pressure on the turbine and system is main tained at one-half pound gage pressure; however, this pressure can be raised to 15 pounds if desired. In connection with this hydrogen system a CO2 auxiliary system is maintained for the purpose of removing and replacing the hydrogen gas in the generator. Also, this COn may be used for generator fire protection. The generator is equipped with four hydrogen coolers, using service water as the cooling medium. Accessories with the turbine generator unit include an oil reservoir of 2175 gallons capacity, 2 full Andale type oil coolers using service water as the cooling medium, shaft-driven centrifugal main oil pump, turbine driven auxiliary oil pump, motor driven emergency bearing oil pump, motor driven turn ing gear and turning gear oil pump, motor driven vapor extractor, oil-operated stop valve, complete oil-operated control system including operating and emergency governors and vacuum and overspeed trip control, atmospheric blowout dia phragm on low pressure casting, eccesntricity, vibration and valve position re corders, GFA-4 voltage regulator, motor driven main exciter rheostat with high speed contactors, pilot exciter rheostat, generator neutral grounding trans former with resistor and a full complement of lubricating oil piping, pressure gages, and thermometers. The lubricating oil, hydrogen and gland seal piping was furnished by the General Electric Company, but was installed by the Mid west Piping and Supply Company as part of their plant piping contract with Ebasco Services, Inc. Erection of turbine generator No. 3 was started June 6, 1951. The generator stator was set in place September 4, 1951, using the 24 WAD02073 tj0n crane. Steam was admitted to the lead piping for blowout purposes on * vember 11, 1951, and was admitted to the turbine for the first time to carry Joad on November 15, 1951. Auxiliaries A 7000-gallon, two-compartment, lubricating oil storage tank was provided s a batch tank for Units 1 & 2 and will be temporarily used for Unit 3. A 50 apm 1)6" rotary oil transfer pump is provided for pumping oil between batch com partments, or to the turbine oil tanks, or to the filtering equipment. Two sets pf turbine oil conditioning equipment were furnished. Each set will filter 540 ailons per hour with a clean oil holding capacity of 330 gallons, and has one 8 gpm rotary oil pump and one special sight overflow fitting. The transfer pump is driven by a three hp, 440 volt, 3 phase, 60 cycle Allis Chalmers drip proof motor. The filter pumps are each driven by a 1 hp, 440, 3 phase, 60 cycle Allis Chalmers drip-proof motor. The lubricating oil conditioning system with storage tank for Units 1 and 2 were furnished by Bowser Incorporated, on order NY-7737, and were placed in operation February 29, 1952. Duplicate equipment less the storage tank was furnished for Unit No. 3 by the same vendor, but on Order NY-77421, and was placed in operation October 24, 1951. Turbine gauge boards 19'-10" long by 10'-9" high, and 5'-0" deep were fab ricated and delivered completely assembled by the Bailey Meter Company on order NY-7770 for Units 1 & 2, and on order NY-77451 for Unit 3. These boards also had provisions for mounting instruments furnished by the turbine vendor for re cording turbine generator conditions. No attempt is made to enumerate the my riad gauges, instruments, recorders, etc., mounted on these boards. These tur bine gauge boards were placed in operation by sections; that is, pieces of equipment on these boards went into operation at various times. However, com pletion of the boards was accomplished by the time the respective turbine gen erators went on the line. A gland seal water tank 3'-6" by 5'-6" by 4'-0" is provided for each unit. Each has a capacity of 575 gallons or 30 minutes supply, and is located at ele vation 5331.83 for Units 1 and 2, and at elevation 5316.04 for Unit 3. Gland sealing water is normally supplied from the condensate water system, but there are emergency supplies from the treated water system and the city water system. All supplies are provided with level control valves and the tank is equipped with a low water alarm and gauge glasses which are visible from the operating floor. These tanks were furnished by the Eaton Metal Products Company on order NY-7779 for Units 1 and 2, and on order NY-77434 for Unit 3, and were placed in operation at the same time the turbine generators went into operation. CONDENSERS AND AUXILIARIES Condenspf The condenser for Unit 1 was furnished by Allis Chalmers Manufacturing Co., Inc. on order NY-774, for Unit 2 by Westinghouse Electric Corporation on order NY-7722, and for Unit 3 by Allis Chalmers Manufacturing Co., Inc., on order NY-77404. All three condensers are designed for condensing load of 320,000 KB Per hour, and are two pass divided water box, horizontal surface, having a coollng surface of 30,000 square feet, consisting of 7/8 inch OD *18 BWG admiralty tubes, requiring a cooling water pump capacity of 30,000 gpm. The erection of condenser No.-l started on November 14, 1949, and was completed and hydrostatically tested in July, 1950. Condenser No. 2 was started on May 18, 1950, and 25 WAD02074 ecstatically tested on September 15, 1950 Condenser No. 3 was started on j^rch 28* 1951, and hydrostatically tested on August 2, 1951. ^n^nser Auxiliaries Two circulating water pumps were furnished with the Order for No. 1 con denser; therefore, no pump was furnished with No. 2 condenser. However, a third up was furnished with No. 3 condenser. All of these pumps are of Allis Chal mers Manufacture, size 48 by 36, vertical, type YDBV FM, 31,000 gpm at 75 feet dynamic head. Each pump is driven by an Allis Chalmers 800 hp, 585 rpm, 2300 volt. 3 phase, 60 cycle motor. Two condensate pumps were furnished for each condenser. The four pumps for condensers 1 and 3 are of vertical type CF2-VT, two stage, size 10 inch by 4 inch furnished by Allis Chalmers Manufacturing Company, Inc., on orders NY-774 and NY-77404. The two condensate pumps for condenser 2 are of vertical it type, nine stage, size 10 inch by 4 inch, furnished by Westinghouse Electric Corporation on order NY-7722. Each of these condensate pumps for all three units is driven by an Allis Chalmers 100 hp, 440 volt, 3 phase, 60 cycle, 1750 rpm vertical motor (Exception-rpm of pumps for Unit 2 is 1170). A two stage twin element steam jet air ejector with surface type inter and after condensers is provided for each machine for the removal of air from the condenser shell during normal operation. Each ejector is designed to remove 150 pounds per hour of air vapor mixture at one inch hg absolute pressure and saturated at 71,5F. These ejectors are designed to withstand 850 psig at 900 F. Steam consumption per element is 600 pounds per hour at 350 psig. Six inch type S-37 primer hogging jets were furnished with each condenser /for starting-up operation. These jets operate at 350 psig with steam consump tion at 2380 pounds per hour. Both SJ AP and hogging jets were furnished by Allis Chalmers Manufacturing Company, Inc., on orders NY-774 and NY-77404 for Units 1 and 3 respectively, and by Westinghouse Electric Corporation on order NY-7722 for Unit No. 2. Accessories included with the condensing plant consist of a float con trolled air operated hot well level valve, pressure reducing orifices and as sociated piping for the main and priming ejectors, air leakage meter with nozale and cap, high water alarm and gauge glasses for the hot well. Circulating Water System The circulating water system is comprised of cooling towers, concrete tun nels, fabricated steel piping and valves, concrete pump well, circulating water pumps (described under "Condenser Auxiliaries") and necessary electrical con trol equipment. The cooling towers furnished by the Harley Company are four cell design for each unit. The two towers for Units 1 and 2 were furnished on order NY-7738 and were erected together as one tower with a concrete dividing wall in the basin only. The tower for Unit 3 was furnished on order NY-77425. These towers are wood filled, induced draft, double flow type, overall size each 73' X 97' X 39', with a capacity of 31,000 gpm, temperature of water en tering tower 104.3 F, temperature of water leaving tower 83 F with wet bulb temperature 63 F. Each cell is provided with a reversible type fan 240" dia meter, capable of delivering 635,000 cfm at 30" tig, and driven through a reduction gear by an Allis Chalmers 60 hp, 3 phase, 60 cycle, 440 volt, 1800 rpm totally enclosed motor. 20" distribution piping carries water from the tunnel 26 WAD02075 t0 the top of the towers and discharges into an open water basin; four pipes per tower, or one per cell. Additional fabricated 30" steel pipe, including valves* is installed from the tunnels to each condenser. The piping was furn ished by Midwest Piping and Supply Company Incorporated, on orders NY-7721 for Units 1 and 2, and NY-77407 for Unit 3, and the valves for this piping were furnished by Kennedy Valve Manufacturing Company on order NY-7750 for Units 1 and 2, and by Chapman Valve on order NY-77413 for Unit 3. 36" thimbles were installed in the west concrete wall of the pump well to ^ich were attached butterfly valves and the discharge side of the circulating KSter pumps. One 42" thimble was installed for future C.W. Pump 4. Also, in this wall, were installed four 8" relief valves at each pump location to relieve tunnel pressure in the event of incorrect valve closure. Four 10" thimbles were installed for future Unit 4. The butterfly valves were furnished by Henry Pratt Company, Inc., on orders NY-7776 for Units 1 & 2, and NY-77424 for Unit 3. Some difficulty was encountered during the early operation of the control equipment for these valves. Field revamping of a portion of this equipment improved the operation; however, a considerable change in the dwsign of the controls by the manufacturer provided a more satisfactory operating condition. filiating Water Treating Equipment Provisions were made in the pump house building for housing the circulat ing water treating equipment. Two separate rooms were built, the south one to house the chlorine equipment and the north room to house the acid and poly phosphate equipment. The chlorination equipment consists of one Wallace and Tiernan semi-automatic solution feed vacuum chlorinator having a maximum capa city of 2000 lbs. per 24 hours to correctly chlorinate cooling water flow of 62,000 gpm. Accessories for this equipment include necessary valves, diffuser, regulating valve, testing set, rubber-lined pipe, and electrically operated control panel and piping to introduce the chlorine into the circulating water tunnel. The entire equipment described above was purchased for the original in stallation from Wallace and Tiernan Products, Inc., on order NY-7763, and was placed in operation on February 15, 1951. In an isolated room within the pump house, but having no passageway to the pump house proper, storage facilities are provided for large chlorine cylinders. Wood racks are built for holding the cylinders and an overhead trolley with a 4000 lb. capacity "Speedway" elec tric hoist is provided for handling these cylinders inside of the building. A jib crane with a 4000 lb. capacity "Speedway" electric hoist is provided for handling the cylinders outside of the building. A special heavy duty dynamo meter with capacity up to 5000 lbs. is provided for attachment to the hoist hooks for weighing chlorine cylinders. These pieces of equipment were provided by the following vendors: the job crane by Industrial Equipment Company on order NY-77179; the trolley hoists, by Wright Manufacturing Division of the American Chain and Cable Company, Incorporated on order NY-77174; the dynamo meter, by John Chatillon and Sons on order NY-77159. The acid-treating equipment consists of two Milton Roy Type AMD special pumps, each to handle at maximum capacity 8.7 gph concentrated sulphuric acid against a discharge head of 50 psi. Accessories for this equipment includes one 4" diameter by 4' long rubber-lined mixing chamber, acid diffuser, an auto matic acid controller including electrical indicating and recording equipment, L & N control panel, one Jabsco Model 903 sampler pump and sufficient lead ened steel pipe, fittings, valves, etc., to carry treating chemicals to the 27 WAD02076 ulating water tunnels. Provisions are made for the operator to deluge himC if with water, in the event of accidental contact with treating chemicals. s acid treating system was purchased from the Permutit Company on Order NY- and was placed in operation on December 2, 1950. In addition to the above 'liiPBent' an stora9e tank 8' by 30* long was provided for storage pur ses by ^e braver Tank and Manufacturing Company, Incorporated, on order NY- 77170* The initial fill of this tank occurred on November 30, 1950. ACCESSORY ELECTRICAL EQDIPMENI ^social All electrical construction was performed by the Collier Electric Company on a unit price contract negotiated January 25, 1950, and covered by local order 50-875, for Units 1 and 2. A second contract similar to the first was negoti ated on February 26, 1951, for Unit No. 3. This second contract was covered by local order SD-2719. The contract for Unit No. 3 was almost an exact duplicate 0f the contract for Units 1 and 2, with the exception that unit prices for No. 3 were increased by 7J$. Electrical installation was started on July 26, 1949, and continued until November 23, 1951, when the major portion of this work was conqpleted. However, a small crew of 1 to 3 men was necessary to complete odds and ends until June 15, 1952. jftjn Switching Control and Protective Equipment Foundations were almost wholly confined to those in the transformer yard just outside the building wall, for supporting structural steel on which were run the generator leads to the main transformers. These foundations were of rei nforced concrete and extended down to firm ground. The generator leads were made up of 3" copper tubing, mounted on bus type insulators, which in turn were mounted on a steel structural frame, all of which was enclosed by a structural screen inside the building. Wall type bushings were provided for egress of the generator leads to the outside. Immediately outside the building wall, a struc tural steel framework was erected to house the generator surge protective equip ment. This equipment consists of three Westinghouse Type "FP" capacitors and three Westinghouse Type "SV" lightning arrestors, all of which were connected through 400 amp., 15 KV, stick-operated disconnect switches to the generator leads. Between the building wall and the transformer delta bus, a three pole gang operated air break switch of 3000 amp. 23 kv capacity was installed. The generator leads from the generator terminals to a point close to the generator air break switch were covered with "Formica" tubing as an insulation. The 13 kv side of the main transformers is connected through a delta bus made of 3" copper tubing, uninsulated. A tap made up of 1%" copper tubing is taken off this delta bus for a feed through a 400 amp. gang-operated air break switch to the station auxiliary transformer. The material for the generator leads was furnished on orders NY-77152, and NY-77126 for Units 1 and 2, and on order NY-77448 for Unit No. 3. The wall bushings for Units 1 and 2 were furnished on order NY-7743, and for Unit No. 3 on order NY-77430. The 3000 ampere 23 kv gang-operated air break switches for Units 1 and 2 were furnished by Delta Star Electric Company on order NY-7745, and for Unit No. 3 by Delta Star Electric Company on order NY-77410. The 400 ampere, 23 kv, gang-operated air break switches for use with station auxiliary transformers 162 were furnished by Delta Star Electric Company on Order NY7745, and for Unit 3 on order NY-77410. The lightning arrestors and capacitors 28 WAD02077 1 sed for generator surge protection were furnished by Westinghouse Electric Corpration 0n orc*er NY-7712, for Units 1 & 2, and order NY-77452, for Unit No. o The generator leads, delta bus and associated equipment, after being test^ were first placed in operation at the same time that the generators them selves were placed in operation. The main control switchboard, located in control room *1, consists of 13 cubicles for all three units and are designated as follows: Panel No. 1, for Battery and Annunciator, and from which all DC control circuits emanate. Panel No. 2, for Rotor temperature recorders. Panel No. 3, for Generator and Turbine temperature recorders. panel No. 4, Generator No. 1. Panel No. 5, Auxiliary Transformer No. 1. Panel No. 6, Standby Auxiliary Transformer. Panel No. 7, Auxiliary Transformer No. 2. Panel No. 8, Generator No. 2. Panel No. 9, Leetsdale Lines Nos. 1 & 2. Panel No. 10, South Terminal Lines Nos. 1 & 2, and 115 kv bus sectionalizing. Panel No. 11, Frequency Control. Panel No. 12, Generator No. 3. Panel No. 13, Auxiliary Transformer No. 3. These panels are all in numerical order reading from east to west, except Panel No. 11> which was taken out of line and placed at the far west end when Unit No. 3 was added. In addition to these panels there is a swinging bracket at the west end of the board for mounting synchronizing equipment. Metering and relaying equipment are generally mounted on the rear of the cubicles. Panels 1 through 11 were furnished for Units 1 and 2 by Westinghouse Electric Corpora tion on order NY-7712, and Panels 12 and 13, and additions to the other panels were furnished for Unit No. 3 by Westinghouse on order NY-77452. The generator field switch cubicle and the motor-operated exciter field rheostat for each unit are mounted on elevation 5272.5 in each turbine pedestal and are controlled from the main switchboard. The field switch cubicles were furnished by Westinghouse Electric Corporation on order NY-7712 for Units 1 and 2, and on Order NY-77452 for Unit 3. The motor-operated rheostat and voltage regulators were furnished as part of the turbine generators by the manufactur ers. Synchronizing of generators to the system is done through the 115 KV oil circuit breakers in the switchyard. In order to provide starting-up power, the Public Service Company installed a 13 KV underground cable system from the north property line of the site to a standby station auxiliary transformer located at the south side of the building in a position similar to the station auxiliary transformers for each unit. This circuit originated from a pole line structure and is installed underground throughout the site area, passing through two manholes and terminating on a steel structure at the standby transformer. The cable for this circuit is three conductor 500,000 CM, lead-covered and insulated for 15,000 volts, and was furn ished by General Cable Corporation, and on order NY-77111. Termination is made in a three phase pothead at the standby transformer. Lightning arrestors are mounted and connected to the short section of copper tubing between the pothead and the transformer. 29 WAD02078 The majority of the control cable used for the various auxiliaries conisted of multi-conductor Kerite or Anhydrex insulated with Neoprene jacket s erall* This control cable was furnished for Units Nos. 1 & 2 by the Simplex gire Cable Company, Inc., and the Kerite Company on orders NY-77110 and ^v_77112, respectively, and for Unit No. 3 by the same companies on orders NY77493 and NY-77494, respectively. One new station battery was provided and installed in the switchgear room pj0# 1-2 on El. 5287. This storage battery consists of 60 cells, tytex type ositive plates, style EOE 29, 560 ampere hours, 8 hour capacity, complete with intercell connectors, hydrometer syringe, thermometer, and four rack sections. This battery was furnished by the Electric Storage Battery Company on order NY7762. A motor generator set for charging this battery was furnished by the Electric Products Company on order NY-7761, and consists of one 10 KW continu ous rated 140 volts, 72 amperes, diverter pole generator, driven by a 15 horseoower 480 volts, 3 phase, 60 cycle induction motor. The generator is suitable for floating the storage battery on the line continuously and capable of at taining a final battery voltage of 1.75 volts per cell. The motor generator set was installed in the same room with the battery and both were placed in service on January 20, 1951. jnviliarv Electrical Equipment The station service transformers include: Two General Electric 6000 kva, OSIC outdoor, 3 phase, 60 cycle, high voltage 13,800/13,200 Delta, low voltage 2400 volt Delta, furnished on order NY-778, one for Unit 1 and one for standby service; one Westinghouse 6000 kva, OISC, outdoor, 3 phase, 60 cycle, high voltage 13,800/13,200 Delta, low voltage 2400 Delta, furnished on order NY-7717 for Unit No. 2; one General Electric 6000 kva, OISC, outdoor, 3 phase, 60 cycle high voltage 13,800/13,200 Delta, low voltage 2400 Delta, furnished on order NY-77405 for Unit No. 3. From the 2400 volt side of these transformers, current is carried to the switchgear through a met al-enclosed 3 phase bus duct made up of 3%" IPS copper tubing insulated with slip-on Phenolic sleeving, all mounted on bus type insulators for 5000 volt service and enclosed in a sheet metal housing or duct. This bus duct was furn ished by the Elpeco division of Realty and Industrial Corporation on order NY7767 for Units 1 and 2, and on order NY-77455 for Unit No. 3. Auxiliary Switching. Control and Protective Equipment Power for Station Auxiliaries is obtained normally from both the 2400 volt and the 480 volt switchgear. Those auxiliaries supplied from the 2400 volt switchgear are the station auxiliary transformers for the coal-handling equip ment and for the cooling tower fans, and all motors over 100 hp. capacity which include those for induced draft fans, forced draft fans, circulating water pumps, boiler feed pumps, and others. In addition to these pieces of equipment, the pulverizers for Unit No. 2 also obtain their power from the 2400 volt switchgear. All of the balance of the auxiliaries except a few very minor items re ceive their power from the 480 volt switchgear which in turn receives it power through transformers from the 2400 volt switchgear. All switchgear, power cen ters and control centers, regardless of their voltage, were furnished by Westtnghouse Electric Manufacturing Corporation on Orders designated with the de scriptions of each group which consist of the following: 30 WAD02079 One 11-compartment gne 7-compartment One 15-compartment One 12-compartment 2400volt switchgear, designated No. 1, 2400volt switchgear, designated Common, 2400volt switchgear, designated No. 2, 2400volt switchgear, designated No. 3. 0f these switchgear are provided with type 50-DH-150 solenoid operated air -* breakers and associated contactors and equipment, with ratings of 600 ^C1200 ampere capacities. Switchgear No. 1 and 2 were furnished on order a 7711 The common switchgear was furnished on order NY-7713, and switchgear ^3 was furnished on order NY-77417. No The station service transformers supplying power from the 2400 volt switchr to the 480 volt switchgear are of 1000 kva capacity, naturally ventilated, ci dry-type* 3 phase, 60 cycle, 2400/480 volts, Delta Delta. One transformer mounted in each switchgear group, which is made up of and designated as follows: One 10 compartment 480 volt power center, No. 1A. One 9 compartment 480 volt power center, No. IB. One 6 compartment 480 volt common power center. One 10 compartment 480 volt power center, No. 2. One 10 compartment 480 volt power center, No. 3A. One 10 compartmenti480 volt power center, No. 3B. Each compartment is equipped with one type DB-25, 3 pole, single throw air cir cuit breaker. Also included in these switchgear are necessary contactors, cur rent transformer, potential transformers, current limiting reactors, key oper ated interlocks, metering instruments, and control switches. 480 volt power centers No. 1A, IB and common were furnished on order NY-7732; power center No. 2 on order NY-7715; power centers 3A and 3B on order NY-77418. In addition to the main 480 volt power centers located in the building, there were four (4) additional 480 volt power centers located outdoors as fol lows: One 5 compartment 480 volt power center for cooling tower No. 1, One 9 compartment 480 volt power center for cooling tower No. 2, One 9 compartment 480 volt power center for cooling tower No. 3, One 18 compartment 480 volt power center for the coal handling equipment. Each of these power centers is provided with a 500 kva, OISC, 3 phase, 60 cycle, 2400/480 volt Delta Delta transformer, throat connected to the power centers. In order to have more adequate control over minor auxiliaries, 12 control centers were installed at strategic points throughout the plant. These control centers are described and designated as follows: One 13 circuit control center designated 1A, One 13 circuit control center designated IB, One 21 circuit control center designated Common, One 30 circuit ventilation control center for Units 1 & 2, 8 circuit valve control center for Units 1 & 2, Owe 15 circuit pump house control center for all units. *Se six control centers were furnished on order NY-7733. 31 WAD02080 One 12 circuit control center designated 2A, One 14 circuit control center designated 2B, control centers were furnished on order NY-7734. One 14 circuit control center designated 3A, One 14 circuit control center designated 3B, One 4 circuit valve control center No. 3, One 15 circuit ventilation control center No. 3. These four control centers were furnished on order NY-77439. In addition to hese 4 AC control centers, two DC valve control centers were furnished h westinghouse Electric Manufacturing Corporation on orders NY-7733 for Units l & 2, and on order NY-77439 for Unit No. 3. These are 12 and 8 circuit con trol centers respectively. The station grounding system consists principally of galvanized steel bar; however, some insulated copper cable was used in places where it was necessary to bring the grounding system through concrete foundations or otherwise buried in concrete. Several sizes of grounding bar were used, 1/8" by 1", 1/4" by 2", 1/8" by 3" and 1/4" by 3". These bars were welded together as was required and oiven a good coat of asphaltic compound, wrapped with black insulating scotch tape and given another coat of asphaltic compound. All underground metallic systems such as pipe, structural steel, etc., were tied into this grounding sys tem at as many points as was conveniently accessible. Also tied into this sys tem were all structural steel towers, building frame and other structural steel supported at ground elevation. Approximately 10,200 feet of steel bar was re quired for this grounding system. A complete cathodic protection system was installed for the station. This system consists of one selenium self-air-cooled, full wave, bridge connected rectifier, complete with DC voltmeter and ammeter, and AC primary circuit break er, DC rating 2 to 30 volts at 50 amperes, AC service 120 volts, 60 cycle, sin gle phase, all mounted in a weatherproof case for outdoor service. The recti fier is mounted in the southwest corner of the switchyard, and is served from the lighting cabinet in the same switchyard. Forty 4" diameter by 80" long graphite ground anodes, National Catalogue item No. 1851 DG, are installed in the form of an "L" near the southwest corner of the property. These anodes are spaced approximately 20 ft. apart, and each anode is completely surrounded by coke breeze to the extent of 14" in diameter. This system, furnished by BranceKrachy Company, Incorporated, on order NY-77178, was placed in operation on December 1, 1950. Power and control cables furnished for the 3 units were supplied by the Simplex Cable Company, The General Cable Company, and the Kerite Company, with some additions by field order from the Okanite Company, The G. E. Supply Com pany, Graybar Electric Company, and the Elliott Schmidt Electric Company. The majority of this cable was furnished on New York orders 77110, 77111, 77112, 77204, 77493, 77494, 77502, 77512, and local orders SD-1693, 2036 and 2367, and consists principally of the following types and sizes: 32 WAD02081 Description of Cable listed below: 1000 Volt, anhydroprene cable with anhydrex SA tape and neoprene jacket. 1/C - 750 MCM, Stranded 1/C - 250 MCM, Stranded 1/C - 3/0 AWG., Stranded 1/C - No. 1 AWG., Stranded 1/C - No. 4 Awg., Stranded 1/C - No. 8 Awg., Stranded 1/C - No. 10 Awg., Stranded 1/C - No. 12 Awg., Stranded Description of Cable listed below: 600 Volt, anhydrex SA tape, colored braid, jute fill, enoprene jacket. 2/C - 19/22 Awg. Control Cable 4/C - 19/22 Awg. Control Cable 7/C - 19/22 Awg. Control Cable 9/C - 19/22 Awg. Control Cable 3/C - 19/25 Awg. Control Cable Description of Cable listed below: Anhydrex SA underground, colored tape, jute fill, neoprene jacket. 2/C No. 2 Awg., Stranded, 600 Volts 3/C No. 4 Awg., Stranded, 1000 Volts 3/C 3/0 Awg., Stranded, 1000 Volts 2/C No. 8 Awg., Stranded, 600 Volts 1/C 1/0 Awg., Stranded, 600 Volts 3/C No. 4 Awg., Stranded, 1000 Volts 3/C No. 2 Awg., Stranded, 600 Volts 1/C 3/0 Awg., Stranded, 600 Volts 2/C No. 12 Awg., Stranded, 600 Volts 4/C No. 12 Awg., Stranded, 600 Volts Description of Cable listed below: 5000 Volts, Kerite Insulation, ambrac tape, asbestos braid jacket. 1/C - No. 1 Awg., Stranded 1/C - 3/0 Awg., Stranded 1/C - 250 MCM, Stranded 1/C - 350 MCM, Stranded 1/C - 4/0 Awg., Stranded 1/C - No. 12 Awg., Stranded, 1000 Volt, okolite ozone resistant rubber insulation, okoprene belt. Description of Cable listed below: 600 Volts, okolite ozone resistant rubber insulation, saturated braid jacket. 1/C - No. 12 Awg., solid 1/C - No. 10 Awg., solid Description of Cable listed below: 1000 Volts, anhydrex ozone resistant insulation, tape, neoprene jacket. 1/C - 750 MCM, Stranded 1/C - 1,000 MCM Stranded 1/C - 500 MCM, Stranded 1/C - 250 MCM, Stranded 1/C - 3/0 Awg., Stranded 33 1/C - No. 1 Awg., Stranded 1/C - No. 4 Awg., Stranded 1/C - No. 8 Awg., Stranded 1/C - No. 10 Awg., Stranded 1/C - No. 12 Awg., Stranded WAD02082 Other Cable: 1/C - No. 12 Awg., solid, 600 Volts, type AVA, varnished cambric, asbestos braid jacket. 1/C - No. 16 Awg., Stranded, 300 Volts, type FA, asbestos insula tion, asbestos jacket. 3/C - 500 MCM, Stranded, 15000 Volts, metallized paper shielding, paper insulation, metallic shielding tape, non magnetic binder, lead sheath 1/C - No. 2 Awg., Stranded, 14000 Volts, varnished cambric insula tion, flameprood hard cover. 1/C - 350 MCM, Stranded, 600 Volts, anhydrex HR tape, neoprene jacket. 1/C - 4/0 Awg., Stranded, 600 Volts, anhydrex, underground neoprene jacket. Although cable trays were used for i greater portion of the cable in the building, considerable steel conduit was also used in practically all sizes from 1/2 inch up to and including 4 inch Listed below are the quantities and sizes of steel conduit used on the three units. 4,361' 46,923' 46,900' 380' 19,580' 21,648' 140' 9,560' 4,400' Size Size Size Size Size Size Size Size Size 1/2" 3/4" 1" lit" w 2" 2J" 3" 4" Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit Rigid Steel Conduit MISCELLANEOUS POWER PLANT EQUIPMENT Service Equipment A vacuum cleaning system is provided for the station building on order NY-77200 and additional hose outlets were provided for Unit 3 on order NY-77509. The exhauster or vacuum pump is a Lamson-Billmyr No. E-7, heavy duty, multi stage centrifugal type, coupled to a 20 HP, 3550 RPM totally enclosed fan-colled motor. Dust is removed through a two stage system, consisting of a primary ex hauster tank with a dust storage capacity of 36.4 cubic feet, and two secondary separators with a dust storage capacity of 36.4 cubic feet and of 7.8 cubic feet respectively. The secondary separators are equipped with 18 tubular cloth filter bags having a net filter area of 131.4 sq. ft. Three external shaker handles allow removal of collected dust from the filter bags without opening the unit. Dust collected in the storage tanks is discharged through Unit 2 py rites piping into the No. 2 boiler wet ash hopper, thence to the ash sluicing system. Miscellaneous cleaning equipment includes necessary flexible hose for connections between the inlet valves of the piping system and the cleaning tools, 34 WAD02083 nl specially shaped cleaning tools and brushes to provide for all types of Surfaces to be cleaned. A total of 46 outlets are located throughout the sta tion building to provide easy access to the vacuum cleaning system. Concrete for the vacuum pump foundation was placed April 16, 1951, and the vacuum pump and motor was set the following week. Piping for all three units was started January 3, 1952, and was completed February 26, 1952. The vacuum cleaning sys tem was Put in operation February 18, 1952. Station Compressed Air for all three units is supplied from a single com pressor and receiver located in the Unit #1 Compressor area. The compressor, receiver, after-cooler, and a Class HD-7A Duomatic control panel were furnished by the Gardner-Denver Company on order NY-77101. The compressor is a Model WBQ, b" x 4^" x 5", vertical, two stage, with a tubular intercooler, suction unload ing valves, and driven through a multi-belt drive by a 50 hp, 1750 rpm motor. The after-cooler, Model B-134, complete with moisture trap and oil separator, is capable of cooling a maximum of 240 CFM of free air at 100 psi to within 15 F of the temperature of the incoming water. Receiver is a 36" diameter x 8'-0" high vertical tank designed for 125 psi working pressure and is furnished com plete with safety valve, pressure gage, and drain valve. Concrete for the com pressor and driver foundation was placed January 18, 1950, and totalled 5% cu. yds. The compressor was set during the week of March 20, 1950. Piping started April 20, 1950, and continued throughout the remainder of the construction period as areas were available for installation. Air mains are of 2" standard pipe, while outlets consist of a 3/4" valve and "Chicago Coupling." The station air compressor was put in service October 12, 1950. rTENF.RAL PLANT. EQUIPMENT Machine shop equipment installed consists of a 16" Leblond D-3023 lathe, a Western Machine Tool Step-toe 20" shaper, a Wells No. 8 Band Hack saw, a Buffalo No. 18 Pedestal Type drill press, a Cincinnati Electric Tool Company Fox 10" bench grinder, and an Oster No. 582 Tom Thumb threading machine. Tool cabinets, work benches, and small hand tools are also provided and all located in the area allocated and permanently fenced by a wire mesh partition furnished by Acron Wire and Iron Company on NY-77523. Laboratory equipment is provided to make such necessary tests as water analysis, boiler tests, turbine generator tests, and other results tests as re quired. Built-in cabinets, table, etc., are provided--also certain plumging items to furnish running water. First aid equipment is provided to administer to emergency needs of the employees. A cot with mattress, blankets and pillow; medicine cabinets, stools, chairs, therapeutic lamp and necessary bandages, and small medicinal items are installed in a room built for this purpose, and which is a part of the office section of the plant. This room is also provided with basin and running water. A small kitchen is provided in which is installed a 7' Westinghouse Elec tric refrigerator, built-in cabinet around the sink and one supply locker. Office equipment and furniture provided for the offices and other parts of the plant are as follows: 35 WAD02084 Clerk's Office 1 Counter 36" wide x 45" high x 10' long Birch Plywood with Plastic Top. 1 Steel Desk - Brown Leather Covering 1 Wood Swivel Chair 4 Steel Armless Chairs - Brown 2 Green 3-Drawer File Cabinets 1 Typewriter Chief Engineer's Office 1 Steel Desk - Gray Leather Covering 1 Upholstered Arm Swivel Chair 4 Steel Arm Chairs - Green 2 Gray 4-Drawer File Cabinets 1 Marchant Calculator 1 Calculator Stand Assistant Chief Engineer's Office 1 Steel Desk - Gray Leather Covering 1 Upholstered Arm Swivel Chair 2 Steel Arm Chairs - Brown 2 Steel Armless Chairs - Brown 3 Gray 4-Drawer File Cabinets Conference Room 1 Conference Table - Wood 7 Steel Armless Chairs - Green 2 Blue Print Files - Gray - 4 Sections per File Results Office 2 Steel Desks - Brown Leather Covering 2 Wood Swivel Chairs - Green 1 Green File Cabinet - 4-Drawer 1 2-Door Steel Storage Cabinet 1 Work Bench 3' 6" high x 30" wide x 23' long - Masonite top - built-in sink - drawer space and cabinet space under top entirely enclosed. &1 Control Room 2 Steel Desks - Brown Leather Covering 2 Wood Swivel Chairs - Green 1 Steel Armless Chair - Brown 2 Stools - Step-up Type 1 Steel Foot Stand tt3 Control Room 1 Steel Desk - Brown Leather Covering 1 Wood Swivel Chair - Green 1 Steel Foot Stand 36 WAD02085 Machine Shop Office 1 Wood Desk 1 Wood Chair MISCELLANEOUS 3 Wood Chest Cabinets 6' high x 5' wide x 20" deep . 1 Set Foot Lockers - wood - 7' high x 18" deep x 18' long - J4" plywood Facilities for handling and storing material in the warehouse consist of: 1 - Nutting 2-Wheel Hand Truck 1 - Metal Drum Emptying Rack 3 - Floor Bins 10' x 10' x 3'8" 1 - Fairbanks Morse Scale Ser. *G099319 Capacity 1000 lbs. Code 1124 1 - Section 60' x 6' x 8" Wood Wall Bins 1 - Section 26'6" x 7' x 8" Wood Wall Bins 1 - Section 20' x 7' x 8" Wood Wall Bins 2 - 16* A-Frame Metal Pipe Racks 6' High 1 -Ruger Model HP-3 Tri-Pod Ser *767 with 3 Ton Hydraulic Hoist TRANSMISSION PLANT general To the south of the station building, an 8 bay switchyard was built to provide for switching and control of all generators and emanating transmission lines. The center six bays are for Units 1 and 2 (3 each) and the bay at each end is for Unit 3. The entire output from each generator is taken directly to a transformer bus at 13.8 kv and stepped up to 115 kv through 3 single phase 16,667 kva transformers and delivered through overhead conductors, air break switches, and oil circuit breakers to the double bus in the switchyard; thence through air break switches and oil circuit breakers to the various outgoing transmission lines. Substation construction progressed concurrently with that of the steam electric station. Structures and Improvements Yard grading was begun on April 20, 1949, and consisted of the removal of earth to a depth of approximately 5' throughout the entire switchyard area. After the concrete foundations were installed, backfill was accomplished to within 12 inches of the top of these foundations. From this point 6 inches of coarse rock was laid, bringing the final grade to El. 5260, which is 6 inches below the finished concrete footings. An eight-foot overall type 423-HF Realock chainlink fence was installed around this switchyard; also, the same type of fence was installed around the potential transformers within the switchyard, totaling approximately 1209.5 feet of fencing in which were installed two 12* drive gates and four 4' walk gates. Lighting facilities for the switchyard consists of 21 lighting standards of type Pemco No. 650, supported on rein forced concrete foundations. Plug receptacles are also provided at strategic Points on the legs of the various towers. A 24-circuit lighting panel is 37 WAD02086 vided for control of the various lighting and plug receptacle circuits in Pr sWitchyard. The lighting fixtures mounted on top of the standards are in^jgscent lighting units,300 watt, Pemco Catl. No. 526; 7 of them with symmea. reftactors an^ 13 of them with asymmetric refractors. In addition to the tfahting standards, bracket-type fixtures are provided in the transformer yard ^hich are n'ounte3 on the various structures. These standards, brackets, fixW reS and refractors were furnished by the General Electric supply Corporation tU order NY-77196 for Units 1 & 2, and by Gaffney-Kroese Electrical Supply Cor poration on order 77496 for Unit 3. Equipment Yard overhead structures consist of structural steel framework, structural -teel towers, pipe structures and their concrete foundations. Nine T-towers ^ith connecting truss are provided for transmission line deadends, six T-2 towers with connecting truss are provided for supporting deadends over the oil circuit breakers, six TT-towers' with connecting truss are provided for deadends over the main transformers, twenty C-towers are provided for supporting the aang-0Perate<* a*r break switches, ninety-five I-beam lally columns are provided for supporting the copper tube main busses and cross-connecting busses in the qenerator bays, twelve B-towers are provided for supporting the lightning ar restors in the line bays, and six small A structures are provided for support ing the fused disconnect switches for each group of potential transformers. All of the yard overhead steel structures were provided by the Flint Steel Com pany on order NY-7798 for Units 1 and 2, and on order NY-77406 for Unit No. 3. The steel erection for Units 1 & 2 was begun February 2, 1950, and completed for all three Units on April 26, 1951. Designation of the switchyard bays read ing from east to west is as follows: Bay No. 1-Leetsdale Feeder No. 2; Bay No. 2-Leetsdale Feeder No. 1; Bay No. 3-Generator No. 1; Bay No. 4-South Terminal Feeder No. 1; Bay No. 5-Generator No. 2; Bay No. 6-Bus section; Bay No. 7-South Terminal Feeder No. 2; Bay No. 8-Generator No. 3. The concrete foundations for these overhead towers and structures extended down to El. 5255 and approximated a total of 835 cubic yards, which included foundations for the oil circuit breakers and potential transformers. Portions of the switchyard equipment were placed in operation from time to time as need ed, and preceded closely the date of operation of the several units. Under ground ducts extended from the building to a manhole in the switchyard desig nated No. 3. Conduits are extended from this manhole to the various pieces of equipment requiring control or power cables. Eight 115 kv oil circuit breakers were provided by the Westinghouse Elec tric Corporation, two on order NY-775, three on order NY-7718, and three on order NY-77416. All of these oil circuit breakers are Westinghouse type GM-4 "DE-ION" grid 3 pole, single throw, 800 ampere, 115,000 volt, with electrically operated mechanically and electrically trip free mechanism. Four of them for use as line breakers are provided with potential devices. Twenty 3 pole gangoperated, 115,000 volt, 600 ampere air break switches are provided in the switch yard. These were furnished by the Delta Star Electric Company on orders NY-7745 for Units 162, and on NY-77410 for Unit 3. (All are type MK-40 air break switches) . Three switches are mounted in each of the four line bays, and two switches are mounted in each of the three generator bays, and two are mounted ln the bus sectionalizing bay. Four type VP 115 kv potential transformers were provided by the Westinghouse Electric Corporation, two on order NY-7712 and counted in bay 4 of the switchyard for connection to the east section of the 38 WAD02087 bus , and two on order NY-77452, mounted in bay 7 for connection to the section of the main bus. Protection for these potential transformers is P!"*r^rjohSvjfev*itd(id.l ebdy by three type B-MMR-0, S & C Electric Company combination fuse on order NY-7744 and for resistor Unit No. mountings, furn1 and on order ^ 77433 for Unit No. 3. These fuse disconnect switches are mounted on small >'i" type structures in the same bays with the potential transformers, in bay 4 /r east section of bus, and in bay 7 for west section of bus. Twelve type SV iinhtning arrestors for outdoor use were furnished by Westinghouse Electric V'jjufacturing Company; nine on order NY-7712, and three on order NY-77452. ee arrestors are mounted in each of the line bays in the switchyard on the g towers, and are connected to the 115 kv line side of the airbreak switches. The overhead cables carrying current from the main transformers to the witchyard bus, and also from the switchyard bus to the line pulloffs, are 4/0 branded bare copper cable furnished by Anaconda Copper Company on orders NY^7149 and NY-77440. 10" disc type insulators for suspension and dead end as semblies were furnished by Ohio Brass Company on order NY-7743. Approximately 555 were required for use in both the transformer and switchyards. Approxiuately 1000 feet f 3/8" diameter galvanized double strength steel cable was requited for the shielding wire over the switchyard and transformer area. This wire was furnished by Burkhardt Steel Company on order NY-7794 for Units 1 and 2 and by the same company on order NY-77459 for Unit No. 3. Carrier current equipment consisting of wave trap, coupling capacitor, and tuning unit was provided by Westinghouse Electric Manufacturing Company on order NY-7712 for one line bay. However, this was not completely installed and was never put into operation. The main power transformer equipment comprises the installation of three banks of three single phase transformers each, one bank for each turbine genera tor unit. The three transformers for Unit No. 1 and the three transformers for Unit No. 3 were purchased from the General Electric Company on orders NY-778 and NY-77405 respectively. Three transformers for Unit No. 2 were purchased from the Westinghouse Electric Manufacturing Company on order NY-7719. All nine transformers are of 16,667 kva capacity, oil insulated, self-cooled, for outdoor service. High voltage is 66,675 with full capacity taps, low voltage is 13,200. Impedience is 1\$> on 16,667 kva base. Transformers are gas-oil sealed construc tion with provisions for future addition of fans to increase continuous rating with forced air cooling. These transformers are connected Wye on the high side and Delta on the low side. A manufacturer's representative was present during most of the assembling and all of the field testing of these transformers. The main power transformer banks as well as the standby and station ser vice transformers are protected from fire by a Grinnell system, comprised of a pipe framework upon which are mounted spray nozzles and temperature actuated thermostats for automatic control of the system. The system is a dry type with thermostatic control under air pressure which, when increased by temperature, releases water into the system under pressure. The systems for all units were furnished by the Grinnell Company on orders NY-77118 for Units 1 & 2, and or der NY-77465 for Unit 3. 39 WAD02088