Pierce County, WA interconnection queue
3 interconnection applications are pending in Pierce County, WA, requesting 401 MW of new generating capacity, as of 15 August 2026. 0 projects have been built here and 12 have been withdrawn since 2001.
Source: interconnection queues published by BPA, PSE. Parsed and normalised by Watt Street. Data as of 15 August 2026. A queued project is a request, not a commitment.
What is waiting in Pierce County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 2 | 400 MW |
| Solar | 1 | 1 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 0 | 0 MW | 0.0% |
| Still pending | 3 | 401 MW | 16.7% |
| Withdrawn | 12 | 2.4 GW | 66.7% |
| Suspended | 3 | — | 16.7% |
Withdrawal is the ordinary outcome of an interconnection application nationally, not a sign of a problem in this county. Most withdrawals are a developer testing a site and moving on.
The largest projects on file
| Project | Fuel | Capacity | Status | Filed | Queue |
|---|---|---|---|---|---|
| 20 | Gas | 340 MW | withdrawn | 2010-01 | PSE |
| 8 | Gas | 309 MW | withdrawn | 2006-01 | PSE |
| Frederickson Power LP | Gas | 300 MW | withdrawn | 2001-07 | BPA |
| 250MW Covington-Chehalis,Tacoma-Olympia | Gas | 250 MW | withdrawn | 2001-04 | BPA |
| G2021-01 | Other | 214 MW | withdrawn | 2021-08 | TPU |
| 100 | Battery | 200 MW | suspended | 2021-04 | PSE |
| 107 | Battery | 200 MW | withdrawn | 2021-04 | PSE |
| 60 | Battery | 200 MW | active | 2018-08 | PSE |
| 98 | Battery | 200 MW | active | 2021-03 | PSE |
| Pierce County Project No 1 | Gas | 170 MW | withdrawn | 2001-05 | BPA |
| Pierce County Project No 2 | Gas | 170 MW | withdrawn | 2001-05 | BPA |
| 59 | Battery | 150 MW | withdrawn | 2018-08 | PSE |
| 7 | Gas | 102 MW | withdrawn | 2005-12 | PSE |
| 151 | Battery | 100 MW | withdrawn | 2024-04 | PSE |
| 80 | Battery | 100 MW | withdrawn | 2020-02 | PSE |
Large-load connection requests in this county
Requests to connect large new demand — data centres, industry, electrification — as distinct from generation. 4 recorded here.
| Request | Capacity | Status | Queue | Stated end use |
|---|---|---|---|---|
| PSE Alderton Substation | 0 MW | withdrawn | BPA | not stated |
| Canyon Substation | 0 MW | active | BPA | not stated |
| S. Tacoma-Southwest 230kV, Tacoma-Southwest 230kV | — | active | BPA | not stated |
| Cowlitz Substation | — | withdrawn | BPA | not stated |
494 of the 545 large-load requests we hold state no end use at all, so most cannot be attributed to any industry. Where this table says “not stated”, that is the filing’s own silence, not our omission.
How this county ranks
Pierce County ranks #686 of 1,607 US counties by capacity currently queued, and #22 of 30 in Washington.
Other Washington counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Benton County | 20 | 10.5 GW |
| Yakima County | 14 | 6.5 GW |
| Klickitat County | 23 | 6.2 GW |
| Grant County | 13 | 3.7 GW |
| Douglas County | 8 | 3.6 GW |
| Walla Walla County | 8 | 1.7 GW |
| Lincoln County | 8 | 1.6 GW |
| Spokane County | 11 | 973 MW |
Go deeper on Pierce County
The interactive map plots every one of these applications, and a generated county report puts them in a sourced PDF with the date each figure was true on every page.
Open Pierce County on the map County reports All of Washington