Cheyenne Prairie Generating Station Expansion Project 25-05
Black Hills Electric Generation, LLC (Applicant), filed an application to own, construct and operate an expansion to the Cheyenne Prairie Generation Station in Laramie County, Wyoming. The proposed expansion would increase the existing natural-gas-fired electric generating station capacity of the Cheyenne Prairie Generation Station (CPGS) from 140 megawatts to 692 megawatts. The proposed expansion involves the addition of three simple-cycle combustion turbine generators and 24 reciprocating internal combustion engines, adding an additional 552 megawatts of capacity to the current plant. The existing CPGS facility was granted an Industrial Siting Permit on August 9, 2012. On June 30, 2026, an amendment request was submitted for the three simple-cycle combustion turbine generators to be added to the existing facility. The Applicant also includes the same three turbine generators in this Section 109 Application. The Cheyenne Prairie Generating Station Expansion Project will be located within the boundary of the existing CPGS facility on private land. Construction is expected to begin in Q4 2026, with an estimated peak workforce of 250 from July 2028 to November 2028 and average of 185 workers on-site over a 37-month construction period. The Project is expected to be constructed in a single phase, with the Project expected to be operational by Q4 2029.
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Black Hills Electric Generation, LLC (Applicant), filed an application to own, construct and operate an expansion to the Cheyenne Prairie Generation Station in Laramie County, Wyoming. The proposed expansion would increase the existing natural-gas-fired electric generating station capacity of the Cheyenne Prairie Generation Station (CPGS) from 140 megawatts to 692 megawatts. The proposed expansion involves the addition of three simple-cycle combustion turbine generators and 24 reciprocating internal combustion engines, adding an additional 552 megawatts of capacity to the current plant. The existing CPGS facility was granted an Industrial Siting Permit on August 9, 2012. On June 30, 2026, an amendment request was submitted for the three simple-cycle combustion turbine generators to be added to the existing facility. The Applicant also includes the same three turbine generators in this Section 109 Application. The Cheyenne Prairie Generating Station Expansion Project will be located within the boundary of the existing CPGS facility on private land. Construction is expected to begin in Q4 2026, with an estimated peak workforce of 250 from July 2028 to November 2028 and average of 185 workers on-site over a 37-month construction period. The Project is expected to be constructed in a single phase, with the Project expected to be operational by Q4 2029.
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