Seven Mile Hill
Carbon County, Wyoming · EIA plant ID 56843 · Operator: PacifiCorp
Nameplate146MWSummer 119 MW
Generators2in service
Net generation458GWh12 mo to Dec 2025
Capacity factor44%wind units, summer MW
Heat rate—thermal plants only
First online2008
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), wind 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2008 | 19.2 | 20.8% | — |
| 2009 | 369.5 | 34.1% | — |
| 2010 | 391.8 | 36.2% | — |
| 2011 | 465.3 | 43.0% | — |
| 2012 | 414.8 | 39.9% | — |
| 2013 | 433.1 | 41.7% | — |
| 2014 | 408.6 | 39.4% | — |
| 2015 | 360.6 | 34.7% | — |
| 2016 | 418.7 | 40.2% | — |
| 2017 | 400.7 | 38.6% | — |
| 2018 | 422 | 40.6% | — |
| 2019 | 385.9 | 37.2% | — |
| 2020 | 518.7 | 49.8% | — |
| 2021 | 478.7 | 46.1% | — |
| 2022 | 499.9 | 48.2% | — |
| 2023 | 463.2 | 44.6% | — |
| 2024 | 399.8 | 38.4% | — |
| 2025 | 458.3 | 44.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Onshore Wind Turbine | WT | 122.1 | 99 | Dec 2008 | Operating | — | ge 1.85-87 |
| 2 | Onshore Wind Turbine | WT | 24.1 | 19.5 | Dec 2008 | Operating | — | ge 1.85-87 |
Owner / operator
Operator: PacifiCorp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PacifiCorp | 100.0% | 146 MW |
Nearby plants
Within 80 km.
| Ekola Flats | 251 MW | 2 km |
| Two Rivers Wind Facility | — | 17.3 km |
| Dunlap | 130 MW | 22.5 km |
| TB Flats | 503 MW | 30.9 km |
| Rock River I LLC | retired | 31.7 km |
| Foote Creek IV | retired | 31.8 km |