DOE/EA-2264: Final Environmental Assessment and Finding of No Significant Impact (February 2025)

DOE has completed a final EA and reached a FONSI for TerraPower, LLC’s Kemmerer Unit 1 Preliminary Activities, Lincoln County, WY.

Office of NEPA Policy and Compliance

February 19, 2025
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EA-2264: Final EA and FONSI

TerraPower, LLC’s Kemmerer Unit 1 Preliminary Activities, Lincoln County, WY 

The U. S. Department of Energy (DOE) has completed a final Environmental Assessment (EA) and reached a Finding of No Significant Impact (FONSI) for TerraPower, LLC’s Kemmerer Unit 1 Preliminary Activities, Lincoln County, WY (the proposed project). 

DOE is proposing to authorize the expenditure of federal funding by TerraPower to conduct preliminary activities for the Natrium Reactor Plant, Kemmerer Power Station Unit 1. Activities would include but are not limited to site preparation, non-structural backfill, trailers, construction of multiple buildings, installation of underground services, laying foundations, installation of stormwater management ponds, locating portable bathroom facilities, establishing temporary power, and constructing temporary parking areas. 

For more information, see TerraPower Kemmerer Unit 1 Preconstruction Activities.