Power plants planned and retiring in Washington
Washington plans 3,601 MW, 12% of its 31,107 MW in service (32nd of 51). 355 MW is being built or tested; storage leads at 1,655 MW.
Washington: planned against running
Washington planned, by fuel
- Solar 1,570 MW (44%)
- Storage 1,655 MW (46%)
- Wind 326 MW (9%)
- Other 50 MW (1%)
Washington operating, by fuel
- Solar 348 MW (1%)
- Storage 318 MW (1%)
- Wind 3,373 MW (11%)
- Natural gas 3,385 MW (11%)
- Coal 670 MW (2%)
- Nuclear 1,151 MW (4%)
- Hydro 21,569 MW (69%)
- Oil 17 MW (0%)
- Other 275 MW (1%)
When Washington capacity arrives and leaves
MW due online and retiring in Washington, 2026 to 2035: 6 rows
| Year | Washington planned MW | Washington retiring MW |
|---|---|---|
| 2026 | 355 | No data |
| 2027 | 660 | 2 |
| 2028 | 410 | No data |
| 2029 | 976 | No data |
| 2031 | 1200 | No data |
| 2035 | No data | 45 |
6 rows from EIA-860M.
CSVWashington projects dated after 2035 or without a year: 0 MW.
Where the Washington projects are
Washington: 11 counties shaded, darker for more planned MW.
Filter Washington planned projects
Filter the 17 planned project lines in Washington.
3,601 MW across 17 project lines, 12% of the 31,107 MW operating in Washington.
- Hop Hill Solar Generation and BESS, Benton: 500 MW solar, online 2031
- Hop Hill Solar Generation and BESS, Benton: 500 MW storage, online 2031
- Lower Snake Solar Generation BESS, Garfield: 300 MW solar, online 2029
- Lower Snake Solar Generation BESS, Garfield: 300 MW storage, online 2029
- Royal Slope, Grant: 260 MW storage, online 2027
What the Washington numbers say
Washington runs 31,107 MW today. The planned list would add 3,601 MW (12%) while 524 MW (2%) of operating units carry a retirement date. Through 2035, Washington has 3,601 MW due online and 47 MW due to retire there.
Washington planned mix: 99% solar, storage and wind, 0% natural gas. Washington stages: 355 MW under construction or in testing, 740 MW permits received, not started, 2,380 MW permits pending, 126 MW early planning, no approvals started. Washington retired 88 MW from 2021 to 2026 and has 604 MW on the canceled or postponed list.
Washington capacity by fuel and status
| Washington fuel | Operating MW | Planned MW | Retiring MW | Retired MW | Canceled in Washington, MW |
|---|---|---|---|---|---|
| Solar | 348 | 1,570 | – | – | 190 |
| Storage | 318 | 1,655 | – | 2 | 200 |
| Wind | 3,373 | 326 | – | – | 188 |
| Natural gas | 3,385 | – | 522 | 5 | – |
| Coal | 670 | – | – | – | – |
| Nuclear | 1,151 | – | – | – | – |
| Hydro | 21,569 | – | 2 | 16 | 9 |
| Oil | 17 | – | – | – | – |
| Other | 275 | 50 | – | 65 | 17 |
| All fuels | 31,107 | 3,601 | 524 | 88 | 604 |
Washington counties with the most planned capacity
| Washington county | Planned, MW | Generators | Largest fuel |
|---|---|---|---|
| Benton County | 1,200 | 3 | Solar |
| Grant County | 650 | 3 | Solar |
| Garfield County | 600 | 2 | Solar |
| Klickitat County | 300 | 2 | Solar |
| Pierce County | 200 | 1 | Storage |
| Thurston County | 200 | 1 | Storage |
| Kitsap County | 170 | 1 | Storage |
| Adams County | 126 | 1 | Wind |
| Yakima County | 80 | 1 | Solar |
| Chelan County | 50 | 1 | Other |
Largest planned projects in Washington
| Washington plant | County | Fuel | Stage | Due | MW |
|---|---|---|---|---|---|
| Hop Hill Solar Generation and BESS | Benton | Solar | Permits pending | 2031 | 500 |
| Hop Hill Solar Generation and BESS | Benton | Storage | Permits pending | 2031 | 500 |
| Lower Snake Solar Generation BESS | Garfield | Solar | Permits pending | 2029 | 300 |
| Lower Snake Solar Generation BESS | Garfield | Storage | Permits pending | 2029 | 300 |
| Royal Slope | Grant | Storage | Permits received, not started | 2027 | 260 |
| Royal Slope | Grant | Solar | Permits received, not started | 2027 | 260 |
| Centralia Battery Energy Storage System | Thurston | Storage | Permits pending | 2028 | 200 |
| Greenwater BESS | Pierce | Storage | Under construction or in testing | 2026 | 200 |
| Hop Hill Solar Generation and BESS | Benton | Wind | Permits pending | 2031 | 200 |
| AGATE BESS | Kitsap | Storage | Permits pending | 2029 | 170 |
Washington against its neighbors
Washington: planned MW equal 12% of operating. Bordering states: Idaho plans 15% of what it runs (3 points above Washington); Oregon plans 42% of what it runs (30 points above Washington).
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Sources
EIA-860M inventory for Washington: 423 operating generators, 17 planned lines, edition August 2026, retrieved 5 Oct 2026. Sources for {e(sn)}.
More on Washington
Questions
Washington: how much new power plant capacity is planned?
3,601 MW, 12% of the 31,107 MW Washington runs. 355 MW is being built or tested in Washington.
Washington: what kind of power plants are planned?
Storage leads Washington with 1,655 of 3,601 planned MW.
Washington: which power plants are retiring?
524 MW of Washington units have a retirement date, of which 0 MW is coal and 522 MW natural gas.
Will Washington get all the planned plants?
Not necessarily. Washington has 604 MW canceled or postponed, and 88 MW (other the largest group) retired from 2021 to 2026.