Allen S King
Coal power plant · Washington County, Minnesota
Nameplate capacity
598 MW
Rank in Minnesota
#7
of 804 plants
In service since
1958
March 1958
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- Northern States Power Co - Minnesota
- County
- Washington County
- Generating units
- 1
- Share of state capacity
- 3.01%
- Rank among coal plants in Minnesota
- #3 of 8
- EIA plant code
- 1915
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Steam Coal | 598 MW | 511 MW | 1958 | 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
| Monticello Nuclear Facility | Nuclear | 685 MW |
| High Bridge | Natural gas | 644 MW |
| Riverside (MN) | Natural gas | 586 MW |
| Black Dog | Natural gas | 563 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 598 MW solar plant and a 598 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