Marshall County, IA interconnection queue
4 interconnection applications are pending in Marshall County, IA, requesting 717 MW of new generating capacity, as of 15 August 2026. 0 projects have been built here and 1 have been withdrawn since 2022.
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 Marshall County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Wind | 2 | 542 MW |
| Solar | 1 | 100 MW |
| Gas | 1 | 75 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 0 | 0 MW | 0.0% |
| Still pending | 4 | 717 MW | 80.0% |
| Withdrawn | 1 | 62 MW | 20.0% |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 |
|---|---|---|---|---|---|
| Lehigh - Marshalltown (Twinkle) 345kV | Wind | 310 MW | active | 2025-08 | MISO |
| Lehigh - Marshalltown (Twinkle) 345kV | Wind | 232 MW | active | 2025-10 | MISO |
| Marshalltown 161 kV Substation | Solar | 100 MW | active | 2022-09 | MISO |
| Marshalltown | Gas | 75 MW | active | 2022-09 | MISO |
| Laurel | Wind | 62 MW | withdrawn | 2024-04 | MISO |
How this county ranks
Marshall County ranks #504 of 1,607 US counties by capacity currently queued, and #4 of 21 in Iowa.
Other Iowa counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Linn County | 10 | 2.3 GW |
| Cerro Gordo County | 5 | 1.4 GW |
| Washington County | 3 | 1.1 GW |
| 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 Marshall 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.