Cheyenne Prairie Generating Station
Laramie County, Wyoming · EIA plant ID 57703 · Operator: Black Hills Service Company LLC
120 MW planned (Natural Gas Fired Combustion Turbine), first expected Dec 2028 · EIA-860M
Nameplate140MWSummer 131 MW
Generators4in service
Net generation493GWh12 mo to Aug 2026
Capacity factor43%gas/coal/oil units, summer MW
Heat rate7,625Btu/kWhfossil units, electric fuel, HHV
First online2014Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2014 | 49 | 17.0% | 8,819 |
| 2015 | 108.9 | 9.5% | 8,266 |
| 2016 | 162.4 | 14.1% | 8,011 |
| 2017 | 124.3 | 10.8% | 7,978 |
| 2018 | 187.2 | 16.3% | 7,842 |
| 2019 | 313.1 | 27.3% | 7,793 |
| 2020 | 354.3 | 30.8% | 7,860 |
| 2021 | 364.8 | 31.8% | 7,716 |
| 2022 | 282.8 | 24.6% | 7,831 |
| 2023 | 421.9 | 36.8% | 7,875 |
| 2024 | 430.2 | 37.4% | 7,652 |
| 2025 | 501.7 | 43.7% | 7,518 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 01A | Natural Gas Fired Combined Cycle | CT | 40 | 37 | Oct 2014 | Operating | — | coming soon |
| 01B | Natural Gas Fired Combined Cycle | CT | 40 | 37 | Oct 2014 | Operating | — | coming soon |
| 01C | Natural Gas Fired Combined Cycle | CA | 20 | 20 | Oct 2014 | Operating | — | coming soon |
| 02A | Natural Gas Fired Combustion Turbine | GT | 40 | 37 | Oct 2014 | Operating | — | coming soon |
| 02B | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Dec 2028 | Planned | — | coming soon |
| 03A | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Dec 2028 | Planned | — | coming soon |
| 03B | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Dec 2028 | Planned | — | coming soon |
| 1 | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Jun 2014 | not_current | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Jun 2014 | not_current | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 40 | 40 | planned Jun 2014 | not_current | — | coming soon |
| 4 | Natural Gas Fired Combined Cycle | CC | 40 | 40 | planned Jun 2014 | not_current | — | coming soon |
| 5 | Natural Gas Fired Combined Cycle | CC | 40 | 40 | planned Jun 2014 | not_current | — | coming soon |
Owner / operator
Operator: Black Hills Service Company LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Cheyenne Light Fuel & Power | 58.6% | 82 MW |
| Black Hills Power, Inc. | 41.4% | 58 MW |
Nearby plants
Within 80 km.
| South Cheyenne Solar | 150 MW | 11.7 km |
| Corriedale Wind Energy | 53 MW | 22.1 km |
| Happy Jack Windpower Project | 29 MW | 23.3 km |
| Roundhouse Renewable Energy II | 106 MW | 24.3 km |
| Silver Sage Windpower | 42 MW | 25.5 km |
| Cowboy Solar II | — | 30.1 km |