Washington Interconnection Projects
interXdata tracks 1,436 interconnection projects in Washington representing 211,183 MW of requested capacity. The dominant technology by capacity is Wind. The most active counties are Grant, Benton, Klickitat.
1,436Total projects
251Active
538Operational
613Withdrawn
211,183 MWRequested capacity
46,103 MWActive capacity
Technology mix
| Technology | Projects | Requested capacity |
|---|---|---|
| Wind | 264 | 49,204 MW |
| Other | 544 | 46,281 MW |
| Solar | 222 | 38,380 MW |
| Gas | 162 | 35,210 MW |
| Battery | 152 | 29,268 MW |
| Solar+Battery | 81 | 12,627 MW |
| Hydro | 10 | 113 MW |
| Solar+Wind+Battery | 1 | 100 MW |
Counties
| County | Projects | Requested capacity |
|---|---|---|
| Grant | 108 | 21,871 MW |
| Benton | 105 | 25,350 MW |
| Klickitat | 94 | 21,270 MW |
| Yakima | 80 | 8,719 MW |
| Adams | 69 | 7,848 MW |
| Spokane | 63 | 4,494 MW |
| Walla Walla | 59 | 8,273 MW |
| Cowlitz | 58 | 8,240 MW |
| Douglas | 53 | 9,145 MW |
| King | 50 | 963 MW |
| Chelan | 44 | 3,055 MW |
| Whatcom | 42 | 7,349 MW |
| Kittitas | 35 | 4,012 MW |
| Columbia | 34 | 5,718 MW |
| Garfield | 32 | 12,049 MW |
| Franklin | 31 | 2,023 MW |
| Pierce | 31 | 2,256 MW |
| Lincoln | 31 | 2,770 MW |
| Lewis | 30 | 5,151 MW |
| Whitman | 27 | 2,641 MW |
| Mason | 27 | 864 MW |
| Clark | 26 | 3,373 MW |
| Snohomish | 26 | 1,730 MW |
| Skagit County | 25 | 3,944 MW |
| Grays Harbor | 22 | 6,269 MW |
| Kittitas County | 21 | 2,173 MW |
| Pend Oreille | 19 | 3,290 MW |
| Stevens | 18 | 241 MW |
| King County | 18 | 1,410 MW |
| Skagit | 18 | 2,211 MW |
| Clallam | 14 | 1,731 MW |
| Thurston | 12 | 714 MW |
| Whatcom County | 12 | 2,360 MW |
| Pierce County | 12 | 2,064 MW |
| Thurston County | 11 | 1,447 MW |
| Skamania | 9 | 617 MW |
| Kitsap County | 7 | 2,342 MW |
| Asotin | 6 | 1,160 MW |
| Pacific | 5 | 389 MW |
| Klickitat & Yakima | 5 | 1,000 MW |
Largest projects
| Project | Queue ID | Technology | Capacity | Status | Location |
|---|---|---|---|---|---|
| WA Queue Project G0624 — Solar in Garfield, Washington | G0624 | Solar | 3,813.0 MW | withdrawn | Garfield, Washington |
| WA Queue Project G0869 — Gas in Benton, Washington | G0869 | Gas | 2,200.0 MW | withdrawn | Benton, Washington |
| WA Queue Project G0822 — Solar in Benton, Washington | G0822 | Solar | 2,000.0 MW | active | Benton, Washington |
| CAC Green H2 Facility | L0555 | Other | 1,600.0 MW | withdrawn | Columbia, Washington |
| WA Queue Project 39 — Battery in Kitsap County, Washington | 39 | Battery | 1,412.0 MW | withdrawn | Kitsap County, Washington |
| Kootenai Generation | G32 | Gas | 1,300.0 MW | withdrawn | Kootenai, Washington |
| Grant Generation | G35 | Gas | 1,300.0 MW | withdrawn | Grant, Washington |
| Competitive Power Venture | G34 | Gas | 1,300.0 MW | withdrawn | Whatcom, Washington |
| Grant Generation | G39 | Gas | 1,300.0 MW | withdrawn | Grant, Washington |
| 1300MW Sickler-Schultz | G60 | Gas | 1,300.0 MW | withdrawn | Benton, Washington |
| Columbia Generating Station | 371_2 | Other | 1,200.0 MW | operational | Benton, Washington |
| WA Queue Project G0556 — Battery in Klickitat, Washington | G0556 | Battery | 1,200.0 MW | withdrawn | Klickitat, Washington |
| WA Queue Project G0351 — Battery in Klickitat, Washington | G0351 | Battery | 1,200.0 MW | withdrawn | Klickitat, Washington |
| WA Queue Project G0608 — Battery in Klickitat, Washington | G0608 | Battery | 1,200.0 MW | active | Klickitat, Washington |
| WA Queue Project G0261 — Wind in Klickitat, Washington | G0261 | Wind | 1,200.0 MW | withdrawn | Klickitat, Washington |
| WA Queue Project G0350 — Battery in Klickitat, Washington | G0350 | Battery | 1,200.0 MW | withdrawn | Klickitat, Washington |
| PSE Cherry Point | L0359 | Other | 1,176.2 MW | withdrawn | Whatcom, Washington |
| WA Queue Project G0730 — Wind in Garfield, Washington | G0730 | Wind | 1,125.0 MW | withdrawn | Garfield, Washington |
| 1100MW Paul | G9 | Gas | 1,100.0 MW | withdrawn | Lewis, Washington |
| Cherry Point Refinery | G27-01 | Gas | 1,000.0 MW | withdrawn | Whatcom, Washington |
| WA Queue Project G0816 — Wind in Grays Harbor, Washington | G0816 | Wind | 1,000.0 MW | withdrawn | Grays Harbor, Washington |
| WA Queue Project G0914 — Battery in Douglas, Washington | G0914 | Battery | 1,000.0 MW | withdrawn | Douglas, Washington |
| WA Queue Project G0815 — Wind in Grays Harbor, Washington | G0815 | Wind | 1,000.0 MW | withdrawn | Grays Harbor, Washington |
| WA Queue Project G0814 — Wind in Grays Harbor, Washington | G0814 | Wind | 1,000.0 MW | withdrawn | Grays Harbor, Washington |
| CA8A - S. Othello | CS24-01 | Solar | 999.0 MW | active | Adams, Washington |
| WA Queue Project G0998 — Gas in Benton, Washington | G0998 | Gas | 960.0 MW | active | Benton, Washington |
| Stack IPI Data Center | L0545 | Other | 958.0 MW | active | Klickitat, Washington |
| West Richland Data Center Campus | L0621 | Other | 912.0 MW | active | Benton, Washington |
| Plymouth Data Center Campus | L0622 | Other | 864.0 MW | withdrawn | Benton, Washington |
| Grand Coulee | 6163_24 | Other | 805.0 MW | operational | Grant, Washington |
Top developers in Washington
| Developer (canonical) | Projects | Capacity |
|---|---|---|
| Public Utility District No. 1 of Cowlitz County | 89 | 6,066 MW |
| Puget Sound Energy | 12 | 2,328 MW |
| Clark Public Utilities | 12 | 1,578 MW |
| Columbia Rural Electric Association | 12 | 1,251 MW |
| CA5 - Palouse | 11 | 1,364 MW |
| CA7 - Big Bend | 11 | 2,227 MW |
| City of Richland, Washington | 11 | 703 MW |
| Benton Rural Electric Association | 10 | 2,476 MW |
| Avista Utilities | 10 | 537 MW |
| PacifiCorp | 9 | 520 MW |
| Calpine Energy Services, L.P. | 9 | 4,450 MW |
| Pend Oreille County PUD No. 1 | 7 | 1,700 MW |
| Big Bend Electric Cooperative, Inc. | 6 | 118 MW |
| Energy Efficiency Solar, Inc. dba ACRO Energy Inc. | 6 | 258 MW |
| CA1 - West Plains | 6 | 540 MW |
Recent material changes
| Observed | Project | Field | Old | New |
|---|---|---|---|---|
| 2026-09-28 | WA Queue Project AFS07 — Wind in Walla Walla, Washington | new_project | — | active |
| 2026-09-28 | WA Queue Project AFS01 — Battery in Franklin, Washington | new_project | — | active |
| 2026-09-28 | WA Queue Project AFS02 — Solar+Battery in Adams, Washington | new_project | — | active |
| 2026-09-28 | WA Queue Project AFS03 — Wind in Garfield, Washington | new_project | — | active |
| 2026-09-02 | AGATE BESS | proposed_online_date | 2027-12-01 | 2029-02-01 |
| 2026-09-02 | Royal Slope | new_project | — | active |
| 2026-09-02 | Royal Slope | new_project | — | active |
| 2026-08-17 | WA Queue Project AFS3 — Wind in Garfield, Washington | poi_name | Dry Creek 230kV Station | Dry Creek Substation |
Explore related data
Source last checked2026-07-31
Data last materially changed2026-10-11
Page data generated2026-10-11
Provenance: avista-oasis; bpa-oasis; U.S. EIA — Form EIA-860M generator inventory (operating + planned); grant-oasis; idahopower-oasis; Lawrence Berkeley National Laboratory — Queued Up interconnection dataset; pacificorp-oasis; pse-oasis; tacoma-oasis. Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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