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- Combustion
- In development
- Under construction
- Operating
- 10 · 100 · 1,000 MW
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- Combustion
- In development
- Under construction
- Operating
St Clair: location and 3 exact-grade projects within 25 km. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
St Clair
Power plant · Gas, combustion turbine
Key facts
Power plant · Gas, combustion turbineran 3% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1968
- Net generation, 2025
- 4,443 MWh
- Grid
- 345 kV to ITC Transmission (MISO)
- Location
- St Clair County, Michigan
- Operated by
- DTE Electric Company
Output
- Gas
- Coal
- Oil
- Unspecified fuel
Details
Who’s behind it
- Owner
- DTE Energy CO
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- Technology
- Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
- Age
- 58 years since 1968
- Unused energy
- 158 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
- Heat rate
- 14,787 Btu/kWh 2025
All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| EPA greenhouse gas reporting (GHGRP) |
|
| Fuel burned (MMBtu), 2025 | 65,697 |
| Capacity factor, 2025 | 0.027 |
| Heat rate (Btu/kWh), 2025 | 14,786.6 |
| Net generation (MWh), 2025 | 4,443 |
| Balancing authority code | MISO |
Retirement
EIA-860M September 2026StatusSome generators have retired; the rest of the plant is still in service. As of EIA-860M for September 2026.- Capacity retired
- 1,552.4 MW
- Generators retired
- 8
- Capacity still in service
- 18.5 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 4 | Conventional Steam Coal | 168.7 MW | Retired | November 2017 |
| 1 | Conventional Steam Coal | 168.7 MW | Retired | March 2019 |
| 2 | Conventional Steam Coal | 156.2 MW | Retired | December 2022 |
| 3 | Conventional Steam Coal | 156.2 MW | Retired | December 2022 |
| 6 | Conventional Steam Coal | 352.7 MW | Retired | December 2022 |
| 7 | Conventional Steam Coal | 544.5 MW | Retired | December 2022 |
| 12A | Petroleum Liquids | 2.7 MW | Retired | June 2024 |
| 12B | Petroleum Liquids | 2.7 MW | Retired | June 2024 |
By technology
| Technology | Retired | Scheduled to retire |
|---|---|---|
| Conventional Steam Coal | 1,547 MW | |
| Petroleum Liquids | 5.4 MW |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 345 kV
- Transmission or distribution system owner
- ITC Transmission
- Balancing authority
- Midcontinent Independent Transmission System Operator, Inc..
- NERC region
- RFC
Transmission lines within 25 km (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.
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| DTE Electric Company | Operator | EIA-860M | ||
| DTE ENERGY CO | Owner | 100.0% | 31 Dec 2023 | EPA GHGRP |
Timeline
- Stated Units 12A, 12B scheduled to retire, 5.4 MW · EIA-860M
- Stated Units 2, 3, 6, 7 scheduled to retire, 1,209.6 MW · EIA-860M
- Stated Unit 1 scheduled to retire, 168.7 MW · EIA-860M
- Stated Unit 4 scheduled to retire, 168.7 MW · EIA-860M
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- LBNL — A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024 (OEDI submission 8742)Yin, 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.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Around this plant
Nearby
within 25 km| Project | Kind | Away | MW |
|---|---|---|---|
| Eastern Power Hydrogen Ready Power Plant Project 2 Under construction | Gas, combined cycle | 4.6 km | 300 |
| Eastern Power Hydrogen Ready Power Plant Project 1 Under construction | Gas, combined cycle | 4.6 km | 300 |
| St. Clair Energy Centre 3 Announced | Gas, combustion turbine | 16.0 km | 245 |
Sources GEM
Sources
- Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.