Jefferson County, WI interconnection queue
2 interconnection applications are pending in Jefferson County, WI, requesting 180 MW of new generating capacity, as of 15 August 2026. 2 projects have been built here and 3 have been withdrawn since 2017.
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 Jefferson County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Solar | 2 | 180 MW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 2 | 224 MW | 28.6% |
| Still pending | 2 | 180 MW | 28.6% |
| Withdrawn | 3 | 475 MW | 42.9% |
| 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 |
|---|---|---|---|---|---|
| Concord SW YD 138 kV Substation | Solar | 300 MW | withdrawn | 2018-03 | MISO |
| Jefferson 138kV Substation | Solar | 149 MW | completed | 2017-06 | MISO |
| Concord 138 kV | Solar | 125 MW | withdrawn | 2020-06 | MISO |
| University (UWW) | Solar | 109 MW | active | 2025-11 | MISO |
| Jefferson 138 kV Substation | Solar | 75 MW | completed | 2018-03 | MISO |
| University (UWW) | Solar | 71 MW | active | 2025-10 | MISO |
| Concord 138kV Substation | Solar | 50 MW | withdrawn | 2018-03 | MISO |
How this county ranks
Jefferson County ranks #963 of 1,607 US counties by capacity currently queued, and #16 of 18 in Wisconsin.
Other Wisconsin counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Kenosha County | 6 | 1.9 GW |
| Walworth County | 4 | 1.6 GW |
| Portage County | 5 | 1.6 GW |
| Dane County | 3 | 1.3 GW |
| Columbia County | 6 | 1.3 GW |
| Fond du Lac County | 2 | 625 MW |
| Rock County | 5 | 510 MW |
| Waushara County | 4 | 330 MW |
Go deeper on Jefferson 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 Jefferson County on the map County reports All of Wisconsin