Coffin Butte
Benton County, Oregon · EIA plant ID 7725 · Operator: Pacific Northwest Generating Coop
Nameplate6MWSummer 6 MW
Generators5in service
Net generation44GWh12 mo to Dec 2025
Capacity factor89%other units, summer MW
Heat rate—thermal plants only
First online1995
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), other 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) |
|---|---|---|---|
| 2002 | 0 | 0.0% | — |
| 2003 | 18.9 | 57.0% | — |
| 2004 | 20.1 | 101.9% | — |
| 2005 | 19.2 | 97.3% | — |
| 2006 | 19.9 | 100.9% | — |
| 2007 | 25 | 90.6% | — |
| 2008 | 44.8 | 94.3% | — |
| 2009 | 42.9 | 90.8% | — |
| 2010 | 42 | 88.8% | — |
| 2011 | 45.1 | 95.4% | — |
| 2012 | 44.1 | 93.1% | — |
| 2013 | 42.4 | 89.5% | — |
| 2014 | 42.3 | 89.5% | — |
| 2015 | 43.9 | 92.7% | — |
| 2016 | 44.8 | 94.5% | — |
| 2017 | 44 | 93.0% | — |
| 2018 | 41.9 | 88.5% | — |
| 2019 | 41.4 | 84.4% | — |
| 2020 | 42.8 | 87.0% | — |
| 2021 | 42.4 | 86.5% | — |
| 2022 | 39.5 | 80.5% | — |
| 2023 | 42.3 | 86.2% | — |
| 2024 | 38.4 | 78.0% | — |
| 2025 | 43.8 | 89.2% | — |
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 | Landfill Gas | IC | 0.8 | 0.8 | Oct 1995 | Operating | — | coming soon |
| 2 | Landfill Gas | IC | 0.8 | 0.8 | Oct 1995 | Operating | — | coming soon |
| 3 | Landfill Gas | IC | 0.8 | 0.8 | Oct 1995 | Operating | — | coming soon |
| 4 | Landfill Gas | IC | 1.6 | 1.6 | Oct 2007 | Operating | — | coming soon |
| 5 | Landfill Gas | IC | 1.6 | 1.6 | Oct 2007 | Operating | — | coming soon |
Owner / operator
Operator: Pacific Northwest Generating Coop. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Pacific Northwest Generating Coop | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| Oregon University System Rabbit Field | 1 MW | 15.6 km |
| Oregon State University Energy Center | 6 MW | 15.6 km |
| Marble Solar LLC (CSG) | 3 MW | 17.6 km |
| Rafael Solar | 2 MW | 24.9 km |
| Sheep Solar | 2 MW | 26 km |
| Orchard Knob | 2 MW | 28.6 km |