Document wgrgm3NYByGqae1L9k5jBkLZB

UBIEGIL02see##2411280 Diaoturrataht206638@3 FFfildc1006/2Y221224 PRigge439 of @28 and Repeal (nettle Affbrdable ('lean Energy Rule, 89 Fed. Reg. 39798 (May 9, 2024) (the "Final Rule" or "Rule"). I am familiar with the Talen Entities' operations, including generation, regulatory compliance, workforce management, and electric markets in general. I also am familiar with the Final Rule, and I am familiar with how the Final Rule will affect the Talen Entities. 5. Talen has ownership interests in coal-fired units that are projected to operate at relatively high capacity factors and will be subject to the Final Rule. 6. Talen is the operator of Units 3 and 4 at the Colstrip Steam Electric Station ("Colstrip") in Rosebud County, Montana. Talen also has a 15 percent ownership stake in these units, which currently consist of two active coal-fired generating units capable of producing up to 1,480 MW of electricity that have been operating for approximately 38 years. Each of the units has approximately 740 MW of generating capacity, and the adjacent Rosebud coal mine supplies Colstrip's low-sulfur subbituminous coal. Units 3 and 4 are the only remaining active units at Colstrip, as Units 1 and 2 recently retired in 2020. Units 3 and 4 have a useful life of at least another two decades. 7. Colstrip is one of the largest coal-fired electric generating facilities west of the Mississippi River, supplying electricity throughout Montana and the Pacific Northwest. Colstrip plays an integral role in maintaining operation of the North Western Balancing Authority in Montana, especially during peak electricity demand events. TIIE FINAL RULE 8. The Final Rule establishes, under Section 111(d) of the Clean Air Act, best systems of emission reduction ("BSI Rs") for existing coal-fired steam generating units 3 Sierra Club FOIA 2025-EPA-04883 ED_018388_00000309-00053 SC_EVERSPLIT0006216