Power plants in Pennington County, South Dakota
3 operating power plants in Pennington County, South Dakota, with 278 MW of nameplate capacity, largest first. From EIA-860M, August 2026.
Largest power plants in Pennington County
| # | Plant | MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | Wild SpringsSolar | 128 | 264 | 23.5% |
| 2 | Ben FrenchNatural gas | 110 | 20.0 | 2.1% |
| 3 | Lange Generating StationNatural gas | 40 | 144 | 41.2% |
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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