Constantine
Hydro power plant · St Joseph County, Michigan
Nameplate capacity
1.2 MW
Rank in Michigan
#278
of 289 plants
In service since
1929
January 1929
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Indiana Michigan Power Co
- County
- St Joseph County
- Generating units
- 4
- Share of state capacity
- 0.00%
- Rank among hydro plants in Michigan
- #48 of 51
- EIA plant code
- 1760
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 0.3 MW | 0.1 MW | 2023 | Operating |
| 2 | Conventional Hydroelectric | 0.3 MW | 0.1 MW | 2023 | Operating |
| 3 | Conventional Hydroelectric | 0.3 MW | 0.1 MW | 1929 | Operating |
| 4 | Conventional Hydroelectric | 0.3 MW | 0.1 MW | 2023 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Michigan
| French Paper Hydro | Hydro | 1.3 MW |
| MSC Croswell | Natural gas | 1.3 MW |
| Ninth Street Hydropower Project | Hydro | 1.2 MW |
| Bissell Solar and Battery Generator | Solar | 1.1 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 1.2 MW solar plant and a 1.2 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Michigan power plants · What Michigan actually generates