Potato Rapids
Hydro power plant · Marinette County, Wisconsin
Nameplate capacity
1.3 MW
Rank in Wisconsin
#255
of 278 plants
In service since
1921
May 1921
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Wisconsin Public Service Corp
- County
- Marinette County
- Generating units
- 3
- Share of state capacity
- 0.01%
- Rank among hydro plants in Wisconsin
- #52 of 61
- EIA plant code
- 4071
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 0.5 MW | 0.5 MW | 1926 | Operating |
| 2 | Conventional Hydroelectric | 0.4 MW | 0.4 MW | 1921 | Operating |
| 3 | Conventional Hydroelectric | 0.4 MW | 0.4 MW | 1921 | 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 Wisconsin
| Rock County Customer Hosted Solar | Solar | 1.4 MW |
| Thornapple | Hydro | 1.4 MW |
| Clam River Dam | Hydro | 1.2 MW |
| Flambeau Lower Project | Hydro | 1.2 MW |
About this data
From EIA’s inventory of operable generators, June 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 1.3 MW solar plant and a 1.3 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 Wisconsin power plants · What Wisconsin actually generates