Coal-fired power plants
We operate three coal-burning power plants that produce about 75 percent of our electricity.
To arrange a plant tour, contact us or call 877-814-7387.
Big Stone Plant
 |
Location: Near Milbank, South Dakota |
| Fuel source: Sub-bituminous coal | |
| Age: Online since 1975 | |
| Employees: Approximately 75 | |
| Capacity: 450 megawatts | |
| Ownership: Otter Tail Power Company - 53.9% NorthWestern Energy - 23.4% Montana-Dakota Utilities - 22.7% |
Coyote Station
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Location: Near Beulah, North Dakota |
| Fuel source: North Dakota lignite | |
| Age: Online since 1981 | |
| Employees: Approximately 80 | |
| Capacity: 420 megawatts | |
| Ownership: Otter Tail Power Company - 35% Northern Municipal Power Agency - 30% Montana Dakota Utilities - 25% NorthWestern Energy - 10% |
Hoot Lake Plant
 |
Location: Near Fergus Falls, Minnesota |
| Total capacity: 156 megawatts | |
| Hydro generation: Online in 1914 | |
| Coal-based generation: Unit 2, online since 1959; Unit 3 online since 1964 | |
| Fuel source: Sub-bituminous coal | |
| Ownership: 100% Otter Tail Power Company |
Agricultural use of fly ash (pdf)
Our Hoot Lake Plant ash has been approved by the Minnesota Pollution Control Agency for use in Minnesota. The by-product is useful for:
- Feedlots
- Private farm roads
- Agricultural product storage pads
- Cattle-working areas
