Ada County, ID interconnection queue
11 interconnection applications are pending in Ada County, ID, requesting 2.0 GW of new generating capacity, as of 15 August 2026. 14 projects have been built here and 51 have been withdrawn since 2001.
Source: interconnection queues published by IP. 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 Ada County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Solar | 9 | 1.8 GW |
| Battery | 2 | 200 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 14 | 531 MW | 18.2% |
| Still pending | 11 | 2.0 GW | 14.3% |
| Withdrawn | 51 | 5.5 GW | 66.2% |
| Suspended | 1 | — | 1.3% |
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 |
|---|---|---|---|---|---|
| 212 | Gas | 650 MW | withdrawn | 2007-12 | IP |
| 674 | Solar | 500 MW | withdrawn | 2022-10 | IP |
| 765 | Solar | 485 MW | withdrawn | 2025-04 | IP |
| 663 | Solar | 400 MW | withdrawn | 2022-07 | IP |
| 665 | Solar | 400 MW | active | 2022-08 | IP |
| 222 | Gas | 325 MW | withdrawn | 2007-12 | IP |
| 646 | Solar | 250 MW | withdrawn | 2022-03 | IP |
| 693 | Solar | 250 MW | withdrawn | 2022-12 | IP |
| 703 | Solar | 250 MW | withdrawn | 2023-02 | IP |
| 793 | Solar | 250 MW | active | 2025-04 | IP |
| 144 | Gas | 200 MW | withdrawn | 2005-07 | IP |
| 266 | Gas | 200 MW | withdrawn | 2008-08 | IP |
| 567 | Solar | 200 MW | completed | 2019-09 | IP |
| 649 | Solar | 200 MW | withdrawn | 2022-03 | IP |
| 669 | Solar | 200 MW | active | 2022-08 | IP |
How this county ranks
Ada County ranks #193 of 1,607 US counties by capacity currently queued, and #2 of 27 in Idaho.
Other Idaho counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Elmore County | 10 | 2.5 GW |
| Bingham County | 8 | 1.8 GW |
| Power County | 4 | 1.6 GW |
| Owyhee County | 5 | 993 MW |
| Canyon County | 4 | 594 MW |
| Jerome County | 2 | 320 MW |
| Bannock County | 2 | 301 MW |
| Kootenai County | 4 | 255 MW |
Go deeper on Ada 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.