Hennepin Island
Hydro power plant · Hennepin County, Minnesota
Nameplate capacity
14 MW
Rank in Minnesota
#119
of 804 plants
In service since
1954
October 1954
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Northern States Power Co - Minnesota
- County
- Hennepin County
- Generating units
- 5
- Share of state capacity
- 0.07%
- Rank among hydro plants in Minnesota
- #5 of 22
- EIA plant code
- 1911
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 2.8 MW | 1.2 MW | 1954 | Operating |
| 2 | Conventional Hydroelectric | 2.8 MW | 1.2 MW | 1955 | Operating |
| 3 | Conventional Hydroelectric | 2.8 MW | 1.2 MW | 1955 | Operating |
| 4 | Conventional Hydroelectric | 2.8 MW | 1.2 MW | 1954 | Operating |
| 5 | Conventional Hydroelectric | 2.5 MW | 1.3 MW | 1955 | 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 Minnesota
| Mora | Other | 14 MW |
| South Fork Wind Farm | Wind | 14 MW |
| Southeast Steam Plant | Natural gas | 13 MW |
| Detroit Lakes | Other | 13 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 14 MW solar plant and a 14 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 Minnesota power plants · What Minnesota actually generates