Grand Coulee
Grant County, Washington · EIA plant ID 6163 · Operator: U S Bureau of Reclamation
Nameplate6,809MWSummer 7,079 MW
Generators33in service
Net generation18,993GWh12 mo to Aug 2026
Capacity factor32%hydro units, summer MW
Heat rate—thermal plants only
First online1941
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), 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 | 13,436.9 | 22.7% | — |
| 2002 | 21,247.3 | 35.9% | — |
| 2003 | 19,022.8 | 32.1% | — |
| 2004 | 18,917.1 | 31.9% | — |
| 2005 | 20,474 | 34.5% | — |
| 2006 | 21,478.3 | 36.2% | — |
| 2007 | 21,632.5 | 36.4% | — |
| 2008 | 22,315.2 | 37.5% | — |
| 2009 | 20,987.2 | 35.3% | — |
| 2010 | 18,351.8 | 30.9% | — |
| 2011 | 24,566.9 | 41.4% | — |
| 2012 | 26,461.2 | 44.5% | — |
| 2013 | 21,073.2 | 35.5% | — |
| 2014 | 20,261.6 | 34.2% | — |
| 2015 | 18,878.6 | 31.8% | — |
| 2016 | 19,011.5 | 32.0% | — |
| 2017 | 20,984 | 35.4% | — |
| 2018 | 21,042.6 | 35.5% | — |
| 2019 | 16,639.4 | 28.1% | — |
| 2020 | 20,290.2 | 34.1% | — |
| 2021 | 18,325.3 | 30.9% | — |
| 2022 | 21,176.2 | 35.7% | — |
| 2023 | 15,582 | 26.3% | — |
| 2024 | 15,443.5 | 26.0% | — |
| 2025 | 16,151.1 | 27.3% | — |
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 | 125 | 125 | Apr 1942 | Operating | — | coming soon |
| 10 | Conventional Hydroelectric | HY | 125 | 125 | Sep 1951 | Operating | — | coming soon |
| 11 | Conventional Hydroelectric | HY | 125 | 125 | Jun 1951 | Operating | — | coming soon |
| 12 | Conventional Hydroelectric | HY | 125 | 125 | Apr 1951 | Operating | — | coming soon |
| 13 | Conventional Hydroelectric | HY | 125 | 125 | Oct 1950 | Operating | — | coming soon |
| 14 | Conventional Hydroelectric | HY | 125 | 125 | Jul 1950 | Operating | — | coming soon |
| 15 | Conventional Hydroelectric | HY | 125 | 125 | Apr 1950 | Operating | — | coming soon |
| 16 | Conventional Hydroelectric | HY | 125 | 125 | Sep 1949 | Operating | — | coming soon |
| 17 | Conventional Hydroelectric | HY | 125 | 125 | Jul 1949 | Operating | — | coming soon |
| 18 | Conventional Hydroelectric | HY | 125 | 125 | May 1949 | Operating | — | coming soon |
| 19 | Conventional Hydroelectric | HY | 600 | 690 | Sep 1975 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 125 | 125 | Jan 1942 | Operating | — | coming soon |
| 20 | Conventional Hydroelectric | HY | 600 | 690 | Apr 1976 | Operating | — | coming soon |
| 21 | Conventional Hydroelectric | HY | 600 | 690 | Dec 1976 | Operating | — | coming soon |
| 22 | Conventional Hydroelectric | HY | 805 | 805 | May 1978 | Operating | — | coming soon |
| 23 | Conventional Hydroelectric | HY | 805 | 805 | Nov 1979 | Operating | — | coming soon |
| 24 | Conventional Hydroelectric | HY | 805 | 805 | May 1980 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 125 | 125 | Sep 1941 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 125 | 125 | Feb 1944 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 125 | 125 | Nov 1943 | Operating | — | coming soon |
| 6 | Conventional Hydroelectric | HY | 125 | 125 | Aug 1943 | Operating | — | coming soon |
| 7 | Conventional Hydroelectric | HY | 125 | 125 | Oct 1947 | Operating | — | coming soon |
| 8 | Conventional Hydroelectric | HY | 125 | 125 | Feb 1943 | Operating | — | coming soon |
| 9 | Conventional Hydroelectric | HY | 125 | 125 | Apr 1948 | Operating | — | coming soon |
| LS1 | Conventional Hydroelectric | HY | 10 | 10 | Mar 1941 | Operating | — | coming soon |
| LS2 | Conventional Hydroelectric | HY | 10 | 10 | Mar 1941 | Operating | — | coming soon |
| LS3 | Conventional Hydroelectric | HY | 10 | 10 | Jan 1951 | Operating | — | coming soon |
| PG10 | Hydroelectric Pumped Storage | PS | 53.5 | 53.5 | Jun 1983 | Operating | — | coming soon |
| PG11 | Hydroelectric Pumped Storage | PS | 53.5 | 53.5 | Nov 1983 | Operating | — | coming soon |
| PG12 | Hydroelectric Pumped Storage | PS | 53.5 | 53.5 | Apr 1984 | Operating | — | coming soon |
| PG7 | Hydroelectric Pumped Storage | PS | 50 | 50 | Oct 1973 | Operating | — | coming soon |
| PG8 | Hydroelectric Pumped Storage | PS | 50 | 50 | Nov 1973 | Operating | — | coming soon |
| PG9 | Hydroelectric Pumped Storage | PS | 53.5 | 53.5 | Apr 1983 | Operating | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 6,809 MW |
Nearby plants
Within 80 km.
| Main Canal Headworks | 27 MW | 44.9 km |
| Chief Joseph | 2,456 MW | 49.5 km |
| Summer Falls Power Plant | 92 MW | 55.8 km |
| Wells | 867 MW | 66.1 km |