Mason County, WA interconnection queue
2 interconnection applications are pending in Mason County, WA, requesting 304 MW of new generating capacity, as of 15 August 2026. 0 projects have been built here and 3 have been withdrawn since 2009.
Source: interconnection queues published by BPA. 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 Mason County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Solar | 1 | 302 MW |
| Hydro | 1 | 2 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 0 | 0 MW | 0.0% |
| Still pending | 2 | 304 MW | 40.0% |
| Withdrawn | 3 | 396 MW | 60.0% |
| Suspended | 0 | — | 0.0% |
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 |
|---|---|---|---|---|---|
| G1048 | Solar | 302 MW | active | 2023-11 | BPA |
| G0973 | Wind | 300 MW | withdrawn | 2023-10 | BPA |
| G0378 | Biomass | 65 MW | withdrawn | 2009-08 | BPA |
| G0426 | Biomass | 31 MW | withdrawn | 2010-04 | BPA |
| Lilliwaup Falls Hydro Project | Hydro | 2 MW | active | 2014-08 | BPA |
Large-load connection requests in this county
Requests to connect large new demand — data centres, industry, electrification — as distinct from generation. 9 recorded here.
| Request | Capacity | Status | Queue | Stated end use |
|---|---|---|---|---|
| Clifton Ridge | 40 MW | withdrawn | BPA | not stated |
| Belfair Substation | 38 MW | energized | BPA | not stated |
| Shelton Hills | 25 MW | withdrawn | BPA | not stated |
| Duckabush | 10 MW | active | BPA | not stated |
| T3ba'das Substation | 10 MW | active | BPA | not stated |
| Manzanita Substation | 7 MW | energized | BPA | not stated |
| Jorstad Substation | 0 MW | active | BPA | not stated |
| Skokomish Substation | — | active | BPA | not stated |
| Transmission Reinforcement | — | active | 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
Mason County ranks #772 of 1,607 US counties by capacity currently queued, and #24 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 Mason 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 Mason County on the map County reports All of Washington