PSE interconnection queue
19 interconnection requests are active in PSE, totalling 2.8 GW, as of 15 August 2026. Of the 142 requests ever filed here, 21 were built and 86 were withdrawn — a build rate of 19.6% on decided applications.
Active requests
19
of 142 ever filed
Capacity queued
2.8 GW
requested, not committed
Built vs decided
19.6%
21 built, 86 withdrawn
Median wait so far
4.6 yr
for requests still active
Median time to build
1.6 yr
request to commercial operation
Source: the PSE interconnection queue as published by the transmission provider, parsed and normalised by Watt Street. Data as of 15 August 2026. Wait times are medians over requests that carry a measured date.
What is queued in PSE, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 12 | 1.7 GW |
| Solar | 2 | 400 MW |
| Gas | 2 | 376 MW |
| Wind | 2 | 304 MW |
| Other | 1 | 1 MW |
Where PSE’s queue sits
| State | Applications | Capacity pending |
|---|---|---|
| Washington | 134 | 2.8 GW |
| Montana | 1 | 0 MW |
Largest active requests
| Project | Fuel | Capacity | County | State | Filed |
|---|---|---|---|---|---|
| 141 | Solar | 300 MW | Thurston County | WA | 2024-02 |
| 1 Pre Jan 2004 | Wind | 200 MW | Kittitas County | WA | 2003-02 |
| 149 | Battery | 200 MW | Whatcom County | WA | 2024-04 |
| 60 | Battery | 200 MW | Pierce County | WA | 2018-08 |
| 87 | Battery | 200 MW | Skagit County | WA | 2020-07 |
| 98 | Battery | 200 MW | Pierce County | WA | 2021-03 |
| 152 | Gas | 188 MW | Whatcom County | WA | 2024-04 |
| 153 | Gas | 188 MW | Skagit County | WA | 2024-04 |
| 129 | Battery | 170 MW | Kitsap County | WA | 2021-12 |
| 139 | Battery | 130 MW | King County | WA | 2023-12 |
| 112 | Battery | 127 MW | Thurston County | WA | 2021-06 |
| 13 | Wind | 104 MW | Kittitas County | WA | 2007-09 |
| 145 | Battery | 100 MW | Whatcom County | WA | 2024-04 |
| 146 | Battery | 100 MW | Skagit County | WA | 2024-04 |
| 148 | Battery | 100 MW | King County | WA | 2024-04 |