- Combustion
- Wind & solar
- Under construction
- Retired
- 10 · 100 · 1,000 MW
Map
- Combustion
- Wind & solar
- Under construction
- Retired
Mascoutah: location and 2 exact-grade projects within 15 mi. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Mascoutah
Power plant · Oil
Key facts
Power plant · Oilran 0% of 2010 Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1946
- Net generation, 2010
- 43 MWh
- Location
- SAINT CLAIR County, Illinois
- Operated by
- City of Mascoutah - (IL)SourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
- Gas
- Oil
Details
Who’s behind it
No companies named in filings yet.
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- Technology
- Oil source: “Petroleum Liquids”
- Age
- 80 years since 1946
Retirement
EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.- Retired
- July 2011
- Capacity retired
- 6.7 MW
- Generators retired
- 5
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| IC1 | Petroleum Liquids | 0.6 MW | Retired | July 2011 |
| IC2 | Petroleum Liquids | 0.6 MW | Retired | July 2011 |
| IC3 | Petroleum Liquids | 1.1 MW | Retired | July 2011 |
| IC4 | Petroleum Liquids | 2.1 MW | Retired | July 2011 |
| IC5 | Petroleum Liquids | 2.3 MW | Retired | July 2011 |
Grid
Not in EIA-860Grid fieldsEIA-860 states no grid voltage or transmission owner for this plant: its annual file lists plants with a generator in the report year, so a plant that retired earlier is not in it.Transmission lines within 15 mi (10)
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Units IC1, IC2, IC3, IC4, IC5 scheduled to retire, 6.7 MW · EIA-860M
- In service · EIA-860M
Sources
4 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M
- LBNLYin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
Around this plant
Nearby
within 15 mi| Project | Kind | Away | MW |
|---|---|---|---|
| Trenton CSG 1 LLC Under construction | Solar | 9.4 mi | 5 |
| Bee Hollow Solar, LLC Under construction | Solar | 11.5 mi | 150 |
Sources EIA-860M