Mason County, MI interconnection queue
7 interconnection applications are pending in Mason County, MI, requesting 1.3 GW of new generating capacity, as of 15 August 2026. 0 projects have been built here and 2 have been withdrawn since 2022.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 Mason County, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Solar | 7 | 1.3 GW |
Outcomes of every application filed here
| Outcome | Projects | Capacity | Share |
|---|---|---|---|
| Built | 0 | 0 MW | 0.0% |
| Still pending | 7 | 1.3 GW | 77.8% |
| Withdrawn | 2 | 115 MW | 22.2% |
| 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 |
|---|---|---|---|---|---|
| PERE MARQUETTE | Solar | 400 MW | active | 2025-10 | MISO |
| Ludington to Keystone 345 kV | Solar | 223 MW | active | 2022-09 | MISO |
| Lake County - Pere Marquette (METC) 138.0kV | Solar | 215 MW | active | 2022-09 | MISO |
| Lake County - Pere Marquette (METC) 138.0kV | Solar | 120 MW | active | 2022-09 | MISO |
| Pere Marquette 138 KV | Solar | 100 MW | withdrawn | 2022-09 | MISO |
| PERE MARQUETTE 138 KV | Solar | 100 MW | active | 2022-09 | MISO |
| PERE MARQUETTE - LINDEMAN 138.0kV | Solar | 100 MW | active | 2022-08 | MISO |
| KEYSTONE - LUDINGTON 345.0kV | Solar | 100 MW | active | 2024-04 | MISO |
| MICHIGAN POWER - PEREMARQUETTE 138.0kV | Gas | 15 MW | withdrawn | 2024-04 | MISO |
How this county ranks
Mason County ranks #307 of 1,607 US counties by capacity currently queued, and #11 of 42 in Michigan.
Other Michigan counties in the queue
| County | Pending | Capacity queued |
|---|---|---|
| Monroe County | 7 | 3.9 GW |
| Huron County | 16 | 3.6 GW |
| Livingston County | 6 | 2.3 GW |
| Branch County | 7 | 2.3 GW |
| Van Buren County | 11 | 2.3 GW |
| Washtenaw County | 7 | 2.2 GW |
| Saginaw County | 10 | 1.8 GW |
| Genesee County | 4 | 1.4 GW |
Go deeper on Mason 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.