Clay Boswell
Coal power plant · Itasca County, Minnesota
Nameplate capacity
923 MW
Rank in Minnesota
#3
of 804 plants
In service since
1973
May 1973
Details
- Primary fuel
- Coal
- Technology
- Conventional Steam Coal
- Operator
- ALLETE, Inc.
- County
- Itasca County
- Generating units
- 3
- Share of state capacity
- 4.65%
- Rank among coal plants in Minnesota
- #2 of 8
- EIA plant code
- 1893
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 4 | Conventional Steam Coal | 558 MW | 585 MW | 1980 | Operating |
| 3 | Conventional Steam Coal | 365 MW | 352 MW | 1973 | Operating |
| D4 | Petroleum Liquids | 0.8 MW | 0.8 MW | 1980 | Standby/Backup: available for service but not normally used |
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
| Sherburne County | Coal | 1,704 MW |
| Prairie Island | Nuclear | 1,186 MW |
| Mankato Energy Center | Natural gas | 741 MW |
| Monticello Nuclear Facility | Nuclear | 685 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 923 MW solar plant and a 923 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