interXdata

Washington Interconnection Projects

interXdata tracks 1,430 interconnection projects in Washington representing 209,689 MW of requested capacity. The dominant technology by capacity is Wind. The most active counties are Grant, Benton, Klickitat.

1,430Total projects
245Active
538Operational
613Withdrawn
209,689 MWRequested capacity
44,609 MWActive capacity

Technology mix

TechnologyProjectsRequested capacity
Wind26248,804 MW
Other54446,281 MW
Solar22138,120 MW
Gas16235,210 MW
Battery15028,809 MW
Solar+Battery8012,252 MW
Hydro10113 MW
Solar+Wind+Battery1100 MW

Counties

CountyProjectsRequested capacity
Grant10621,351 MW
Benton10525,350 MW
Klickitat9421,270 MW
Yakima808,719 MW
Adams687,473 MW
Spokane634,494 MW
Cowlitz588,240 MW
Walla Walla588,173 MW
Douglas539,145 MW
King50963 MW
Chelan443,055 MW
Whatcom427,349 MW
Kittitas354,012 MW
Columbia345,718 MW
Lincoln312,770 MW
Garfield3111,749 MW
Pierce312,256 MW
Franklin301,824 MW
Lewis305,151 MW
Mason27864 MW
Whitman272,641 MW
Clark263,373 MW
Snohomish261,730 MW
Skagit County253,944 MW
Grays Harbor226,269 MW
Kittitas County212,173 MW
Pend Oreille193,290 MW
King County181,410 MW
Stevens18241 MW
Skagit182,211 MW
Clallam141,731 MW
Pierce County122,064 MW
Thurston12714 MW
Whatcom County122,360 MW
Thurston County111,447 MW
Skamania9617 MW
Kitsap County72,342 MW
Asotin61,160 MW
Douglas County5787 MW
Pacific5389 MW

Largest projects

ProjectQueue IDTechnologyCapacityStatusLocation
WA Queue Project G0624 — Solar in Garfield, WashingtonG0624Solar3,813.0 MWwithdrawnGarfield, Washington
WA Queue Project G0869 — Gas in Benton, WashingtonG0869Gas2,200.0 MWwithdrawnBenton, Washington
WA Queue Project G0822 — Solar in Benton, WashingtonG0822Solar2,000.0 MWactiveBenton, Washington
CAC Green H2 FacilityL0555Other1,600.0 MWwithdrawnColumbia, Washington
WA Queue Project 39 — Battery in Kitsap County, Washington39Battery1,412.0 MWwithdrawnKitsap County, Washington
Kootenai GenerationG32Gas1,300.0 MWwithdrawnKootenai, Washington
1300MW Sickler-SchultzG60Gas1,300.0 MWwithdrawnBenton, Washington
Grant GenerationG35Gas1,300.0 MWwithdrawnGrant, Washington
Grant GenerationG39Gas1,300.0 MWwithdrawnGrant, Washington
Competitive Power VentureG34Gas1,300.0 MWwithdrawnWhatcom, Washington
WA Queue Project G0350 — Battery in Klickitat, WashingtonG0350Battery1,200.0 MWwithdrawnKlickitat, Washington
WA Queue Project G0261 — Wind in Klickitat, WashingtonG0261Wind1,200.0 MWwithdrawnKlickitat, Washington
WA Queue Project G0608 — Battery in Klickitat, WashingtonG0608Battery1,200.0 MWactiveKlickitat, Washington
WA Queue Project G0351 — Battery in Klickitat, WashingtonG0351Battery1,200.0 MWwithdrawnKlickitat, Washington
WA Queue Project G0556 — Battery in Klickitat, WashingtonG0556Battery1,200.0 MWwithdrawnKlickitat, Washington
Columbia Generating Station371_2Other1,200.0 MWoperationalBenton, Washington
PSE Cherry PointL0359Other1,176.2 MWwithdrawnWhatcom, Washington
WA Queue Project G0730 — Wind in Garfield, WashingtonG0730Wind1,125.0 MWwithdrawnGarfield, Washington
1100MW PaulG9Gas1,100.0 MWwithdrawnLewis, Washington
WA Queue Project G0914 — Battery in Douglas, WashingtonG0914Battery1,000.0 MWwithdrawnDouglas, Washington
WA Queue Project G0816 — Wind in Grays Harbor, WashingtonG0816Wind1,000.0 MWwithdrawnGrays Harbor, Washington
Cherry Point RefineryG27-01Gas1,000.0 MWwithdrawnWhatcom, Washington
WA Queue Project G0814 — Wind in Grays Harbor, WashingtonG0814Wind1,000.0 MWwithdrawnGrays Harbor, Washington
WA Queue Project G0815 — Wind in Grays Harbor, WashingtonG0815Wind1,000.0 MWwithdrawnGrays Harbor, Washington
CA8A - S. OthelloCS24-01Solar999.0 MWactiveAdams, Washington
WA Queue Project G0998 — Gas in Benton, WashingtonG0998Gas960.0 MWactiveBenton, Washington
Stack IPI Data CenterL0545Other958.0 MWactiveKlickitat, Washington
West Richland Data Center CampusL0621Other912.0 MWactiveBenton, Washington
Plymouth Data Center CampusL0622Other864.0 MWwithdrawnBenton, Washington
Grand Coulee6163_24Other805.0 MWoperationalGrant, Washington

Top developers in Washington

Developer (canonical)ProjectsCapacity
Public Utility District No. 1 of Cowlitz County896,066 MW
Columbia Rural Electric Association121,251 MW
Puget Sound Energy122,328 MW
Clark Public Utilities121,578 MW
City of Richland, Washington11703 MW
CA5 - Palouse111,364 MW
CA7 - Big Bend112,227 MW
Benton Rural Electric Association102,476 MW
Avista Utilities10537 MW
PacifiCorp9520 MW
Calpine Energy Services, L.P.94,450 MW
Pend Oreille County PUD No. 171,700 MW
CA1 - West Plains6540 MW
Big Bend Electric Cooperative, Inc.6118 MW
Energy Efficiency Solar, Inc. dba ACRO Energy Inc.6258 MW

Recent material changes

ObservedProjectFieldOldNew
2026-08-17WA Queue Project AFS3 — Wind in Garfield, Washingtonpoi_nameDry Creek 230kV StationDry Creek Substation

Explore related data

Source last checked2026-07-31
Data last materially changed2026-08-27
Page data generated2026-08-27

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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