Power plants in Marathon County, Wisconsin
6 operating power plants in Marathon County, Wisconsin, with 1,165 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in Marathon County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | WestonCoal | 946 | 4,842 | 58.5% |
| 2 | Weston RICENatural gas | 132 | 144 | 12.5% |
| 3 | Rothschild Biomass Cogen FacilityWood biomass | 58 | 166 | 32.9% |
| 4 | Mosinee MillWood biomass | 23 | 11.1* | 63.7% |
| 5 | WausauHydro | 5.4 | 24.5 | 51.7% |
| 6 | Domtar Paper Company RothschildHydro | 1.1 | 0.5 | 5.4% |
* Fewer than 12 months of 2025 reported, so the total is partial.
MW is the nameplate capacity of operating generators and batteries. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources
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