Linn County, IA interconnection queue
10 interconnection applications are pending in Linn County, IA, requesting 2.3 GW of new generating capacity, as of 15 August 2026. 2 projects have been built here and 3 have been withdrawn since 2018.
Source: interconnection queues published by MISO. 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 Linn County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Nuclear | 5 | 1.3 GW |
| Solar | 5 | 1.1 GW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 2 | 295 MW | 13.3% |
| Still pending | 10 | 2.3 GW | 66.7% |
| Withdrawn | 3 | 400 MW | 20.0% |
| 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 |
|---|---|---|---|---|---|
| Duane Arnold 161 kV | Nuclear | 646 MW | active | 2025-03 | MISO |
| Duane Arnold | Solar | 400 MW | active | 2021-08 | MISO |
| Sub K (Tiffin)-Duane Arnold 345kV | Solar | 300 MW | active | 2022-09 | MISO |
| Duane Arnold (ARNOLD 5) | Nuclear | 251 MW | active | 2025-08 | MISO |
| Duane Arnold - Tiffin (MEC) 345 kV Line Tap | Solar | 250 MW | withdrawn | 2019-04 | MISO |
| Duane Arnold 345kV Substation | Solar | 200 MW | completed | 2019-04 | MISO |
| Duane Arnold (ARNOLD 5) | Nuclear | 200 MW | active | 2025-08 | MISO |
| Prairie Creek - Stony Point 115kV | Solar | 195 MW | active | 2025-10 | MISO |
| Fairfax 161kV Substation | Solar | 100 MW | withdrawn | 2018-03 | MISO |
| Fairfax | Solar | 100 MW | active | 2021-08 | MISO |
| Duane Arnold (ARNOLD 5) | Nuclear | 100 MW | active | 2025-08 | MISO |
| Oakridge 69 kV Substation | Gas | 95 MW | completed | 2019-04 | MISO |
| Duane Arnold (ARNOLD 5) | Nuclear | 64 MW | active | 2025-08 | MISO |
| Mount Vernon | Solar | 60 MW | active | 2021-08 | MISO |
| Duane Arnold - Tiffin (MEC) 345 kV Line Tap | Solar | 50 MW | withdrawn | 2019-04 | MISO |
How this county ranks
Linn County ranks #159 of 1,607 US counties by capacity currently queued, and #1 of 21 in Iowa.
Other Iowa counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Cerro Gordo County | 5 | 1.4 GW |
| Washington County | 3 | 1.1 GW |
| Marshall County | 4 | 717 MW |
| Clinton County | 3 | 610 MW |
| Franklin County | 3 | 560 MW |
| Webster County | 2 | 470 MW |
| Story County | 2 | 400 MW |
| Muscatine County | 3 | 329 MW |
Go deeper on Linn 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.