St Croix Falls
Hydro power plant · Polk County, Wisconsin
Nameplate capacity
23 MW
Rank in Wisconsin
#80
of 278 plants
In service since
2010
January 2010
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Northern States Power Co - Minnesota
- County
- Polk County
- Generating units
- 8
- Share of state capacity
- 0.12%
- Rank among hydro plants in Wisconsin
- #6 of 61
- EIA plant code
- 4011
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 5 | Conventional Hydroelectric | 3.4 MW | 2.0 MW | 2010 | Operating |
| 6 | Conventional Hydroelectric | 3.4 MW | 1.9 MW | 2010 | Operating |
| 7 | Conventional Hydroelectric | 3.2 MW | 2.0 MW | 2023 | Operating |
| 8 | Conventional Hydroelectric | 3.2 MW | 1.9 MW | 2023 | Operating |
| 1 | Conventional Hydroelectric | 2.5 MW | 1.8 MW | 2017 | Operating |
| 2 | Conventional Hydroelectric | 2.5 MW | 1.8 MW | 2017 | Operating |
| 3 | Conventional Hydroelectric | 2.5 MW | 1.9 MW | 2017 | Operating |
| 4 | Conventional Hydroelectric | 2.5 MW | 1.9 MW | 2017 | 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
| Custer Energy Center | Natural gas | 25 MW |
| Mosinee Mill | Other | 23 MW |
| O'Brien Solar Fields | Solar | 22 MW |
| Chippewa Falls | Hydro | 22 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 23 MW solar plant and a 23 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