Power plant · EIA plant code 3888
Wanapum
- Operator
- PUD No 2 of Grant County - (WA)
- Location
- Grant, WA (county level only)
- Balancing authority
- Public Utility District No. 2 of Grant County, Washington (GCPD)
- Nameplate capacity
- 1,220 MW
- Summer capacity
- 1,220 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Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date.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
- 4,437,537 MWh
- Capacity factor
- 41.5%
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Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date.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Resource Integrated Database (eGRID) · data for 2023 · as of Jun 16, 2025 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date.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 |
|---|---|---|---|---|---|
| 10A | Conventional Hydroelectric | WAT | 122 MW | 2014 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 1A | Conventional Hydroelectric | WAT | 122 MW | 2013 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 2A | Conventional Hydroelectric | WAT | 122 MW | 2012 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 3A | Conventional Hydroelectric | WAT | 122 MW | 2017 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 4A | Conventional Hydroelectric | WAT | 122 MW | 2020 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 5A | Conventional Hydroelectric | WAT | 122 MW | 2012 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 6A | Conventional Hydroelectric | WAT | 122 MW | 2016 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 7A | Conventional Hydroelectric | WAT | 122 MW | 2011 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 8A | Conventional Hydroelectric | WAT | 122 MW | 2018 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
| 9A | Conventional Hydroelectric | WAT | 122 MW | 2015 | Operable · As of September 2026 (EIA-860M): (OP) Operating |
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.