Wild Horse
Kittitas County, Washington · EIA plant ID 56322 · Operator: Puget Sound Energy Inc
Nameplate273MWSummer 271 MW
Generators3in service
Net generation614GWh12 mo to Aug 2026
Capacity factor26%wind units, summer MW
Heat rate—thermal plants only
First online2006
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), 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) |
|---|---|---|---|
| 2006 | 11.2 | 6.6% | — |
| 2007 | 612.9 | 30.6% | — |
| 2008 | 672.7 | 33.5% | — |
| 2009 | 555.2 | 26.9% | — |
| 2010 | 607.1 | 25.4% | — |
| 2011 | 680.8 | 28.5% | — |
| 2012 | 678.8 | 28.3% | — |
| 2013 | 659.9 | 27.6% | — |
| 2014 | 650.6 | 27.2% | — |
| 2015 | 610 | 25.5% | — |
| 2016 | 672.9 | 28.1% | — |
| 2017 | 613.5 | 25.7% | — |
| 2018 | 639.2 | 26.8% | — |
| 2019 | 613.3 | 25.7% | — |
| 2020 | 765 | 31.9% | — |
| 2021 | 714.5 | 29.9% | — |
| 2022 | 564.2 | 23.6% | — |
| 2023 | 525.9 | 22.0% | — |
| 2024 | 636.8 | 26.6% | — |
| 2025 | 591 | 24.9% | — |
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 | 228.6 | 226.8 | Dec 2006 | Operating | — | vestas V80-1.8 |
| WH2 | Onshore Wind Turbine | WT | 44 | 44 | Nov 2009 | Operating | — | vestas V80-2.0 |
| WHS1 | Solar Photovoltaic | PV | 0.5 | 0.4 | Oct 2007 | Operating | — | coming soon |
Owner / operator
Operator: Puget Sound Energy Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Puget Sound Energy Inc | 100.0% | 273 MW |
Nearby plants
Within 80 km.
| Vantage Wind Energy LLC | 90 MW | 9.3 km |
| Camas Solar Project | 5 MW | 23.3 km |
| Penstemon Solar Project | 5 MW | 23.3 km |
| Wanapum | 1,220 MW | 25.5 km |
| PEC Headworks | retired | 27.2 km |
| Royal Slope | — | 27.6 km |