Butt Valley
Plumas County, California · EIA plant ID 221 · Operator: Pacific Gas & Electric Co
Nameplate40MWSummer 41 MW
Generators1in service
Net generation145GWh12 mo to Dec 2025
Capacity factor40%hydro units, summer MW
Heat rate—thermal plants only
First online1958
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), hydro 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) |
|---|---|---|---|
| 2001 | 108.2 | 30.1% | — |
| 2002 | 89.6 | 24.9% | — |
| 2003 | 153.3 | 42.7% | — |
| 2004 | 149.2 | 41.4% | — |
| 2005 | 130.5 | 36.3% | — |
| 2006 | 257.4 | 71.7% | — |
| 2007 | 113.5 | 32.4% | — |
| 2008 | 92.2 | 26.2% | — |
| 2009 | 87.2 | 24.9% | — |
| 2010 | 116.5 | 33.2% | — |
| 2011 | 184.2 | 52.6% | — |
| 2012 | 104.9 | 29.8% | — |
| 2013 | 133.3 | 37.1% | — |
| 2014 | 88 | 24.5% | — |
| 2015 | 73.3 | 20.4% | — |
| 2016 | 76.6 | 21.3% | — |
| 2017 | 138.1 | 38.5% | — |
| 2018 | 58.4 | 16.3% | — |
| 2019 | 129.8 | 36.1% | — |
| 2020 | 108.7 | 30.2% | — |
| 2021 | 19.1 | 5.3% | — |
| 2022 | 74.6 | 20.8% | — |
| 2023 | 146.5 | 40.8% | — |
| 2024 | 149.3 | 41.5% | — |
| 2025 | 145.3 | 40.5% | — |
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 | Conventional Hydroelectric | HY | 40 | 41 | Dec 1958 | Operating | — | coming soon |
Owner / operator
Operator: Pacific Gas & Electric Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Pacific Gas & Electric Co | 100.0% | 40 MW |
Nearby plants
Within 80 km.
| Caribou 2 | 118 MW | 10.6 km |
| Caribou 1 | 74 MW | 10.7 km |
| Oak Flat | 1 MW | 11.4 km |
| Hamilton Branch | 5 MW | 13.4 km |
| Collins Pine Project | 5 MW | 14.9 km |
| Belden | 118 MW | 19.4 km |