Power plant · EIA plant code 3921
Chief Joseph
- Operator
- USACE Northwestern Division
- Location
- Douglas, WA (county level only)
- Balancing authority
- Bonneville Power Administration (BPAT)
- Nameplate capacity
- 2,456.2 MW
- Summer capacity
- 2,456.2 MW
U.S. Energy Information Administration · Annual Electric Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 10, 2027. Last checked for an update: Oct 31, 2026.
Generation in 2025
- Net generation
- 9,806,156 MWh
- Capacity factor
- 45.6%
Capacity factor is net generation divided by nameplate capacity times the hours each generator was in service that year, counted by month.
U.S. Energy Information Administration · Power Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 11, 2027. Last checked for an update: Oct 31, 2026.
Emissions
eGRID2023 (revision 2) reports no carbon dioxide for this plant.
Emissions are for 2023, the newest eGRID year. Generation is for 2025, the newest EIA-923 year.
U.S. Environmental Protection Agency · Emissions & Generation Resource Integrated Database (eGRID) · data for 2023 · as of Jun 16, 2025 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Jan 31, 2026. Last checked for an update: Oct 31, 2026.
Generators
| Generator | Technology | Energy source | Nameplate | Operating since | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | WAT | 88.2 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 10 | Conventional Hydroelectric | WAT | 88.2 MW | 1955 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
| 11 | Conventional Hydroelectric | WAT | 88.2 MW | 1955 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
| 12 | Conventional Hydroelectric | WAT | 88.2 MW | 1955 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
| 13 | Conventional Hydroelectric | WAT | 88.2 MW | 1957 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
| 14 | Conventional Hydroelectric | WAT | 88.2 MW | 1957 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 15 | Conventional Hydroelectric | WAT | 88.2 MW | 1957 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 16 | Conventional Hydroelectric | WAT | 88.2 MW | 1957 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 17 | Conventional Hydroelectric | WAT | 95 MW | 1977 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 18 | Conventional Hydroelectric | WAT | 95 MW | 1977 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 19 | Conventional Hydroelectric | WAT | 95 MW | 1977 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
| 2 | Conventional Hydroelectric | WAT | 88.2 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 20 | Conventional Hydroelectric | WAT | 95 MW | 1978 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 21 | Conventional Hydroelectric | WAT | 95 MW | 1978 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 22 | Conventional Hydroelectric | WAT | 95 MW | 1978 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 23 | Conventional Hydroelectric | WAT | 95 MW | 1978 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 24 | Conventional Hydroelectric | WAT | 95 MW | 1979 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 25 | Conventional Hydroelectric | WAT | 95 MW | 1979 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 26 | Conventional Hydroelectric | WAT | 95 MW | 1979 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 27 | Conventional Hydroelectric | WAT | 95 MW | 1979 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 3 | Conventional Hydroelectric | WAT | 88.2 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 4 | Conventional Hydroelectric | WAT | 88.2 MW | 1958 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 5 | Conventional Hydroelectric | WAT | 88.2 MW | 1957 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 6 | Conventional Hydroelectric | WAT | 88.2 MW | 1956 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 7 | Conventional Hydroelectric | WAT | 88.2 MW | 1956 | Operable · As of September 2026 (EIA-860M): (OS) Out of service and NOT expected to return to service in next calendar year |
| 8 | Conventional Hydroelectric | WAT | 88.2 MW | 1956 | Operable · As of September 2026 (EIA-860M): (OS) Out of service and NOT expected to return to service in next calendar year |
| 9 | Conventional Hydroelectric | WAT | 88.2 MW | 1955 | Operable · As of September 2026 (EIA-860M): (OA) Out of service but expected to return to service in next calendar year |
U.S. Energy Information Administration · Monthly Update to the Annual Electric Generator Report (Form EIA-860M) · data for 2026-09 · as of Oct 23, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Nov 23, 2026. Last checked for an update: Oct 31, 2026.