Chokecherry and Sierra Madre WindUnder construction
Carbon County, Wyoming · EIA plant ID 58987 · Operator: Power Company of Wyoming LLC
3,551 MW under construction (Onshore Wind Turbine), first expected Dec 2031 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service · 3,551 MW building
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
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 |
|---|---|---|---|---|---|---|---|---|
| I-A | Onshore Wind Turbine | WT | 844.2 | 844.2 | planned Dec 2031 | Under construction | — | coming soon |
| I-B | Onshore Wind Turbine | WT | 849.6 | 849.6 | planned Dec 2031 | Under construction | — | coming soon |
| II-A | Onshore Wind Turbine | WT | 1,303.2 | 1,303.2 | planned Dec 2032 | Under construction | — | coming soon |
| II-B | Onshore Wind Turbine | WT | 553.5 | 553.5 | planned Dec 2033 | Under construction | — | coming soon |
Owner / operator
Operator: Power Company of Wyoming LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Sinclair Oil Refinery | 5 MW | 13.1 km |
| Seminoe | 52 MW | 57.9 km |
| Kortes | 36 MW | 60.7 km |
| Seven Mile Hill | 146 MW | 73.2 km |
| Ekola Flats | 251 MW | 75.1 km |