Pierre Solar
Hughes County, South Dakota · EIA plant ID 60686 · Operator: Western Minnesota Mun Pwr Agny
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor22%solar units, summer MW
Heat rate—thermal plants only
First online2016
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2016 | 0.4 | 12.4% | — |
| 2017 | 2.1 | 23.5% | — |
| 2018 | 1.7 | 19.1% | — |
| 2019 | 1.8 | 20.9% | — |
| 2020 | 2.1 | 23.4% | — |
| 2021 | 2 | 22.9% | — |
| 2022 | 2.1 | 23.6% | — |
| 2023 | 0 | 0.2% | — |
| 2024 | 2 | 22.6% | — |
| 2025 | 1.9 | 22.2% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| PIERS | Solar Photovoltaic | PV | 1 | 1 | Sep 2016 | Operating | — | coming soon |
Owner / operator
Operator: Western Minnesota Mun Pwr Agny. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Western Minnesota Mun Pwr Agny | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Ft. Pierre | 6 MW | 6.3 km |
| Oahe | 786 MW | 9.3 km |
| North Bend Wind Project, LLC | 200 MW | 51.4 km |
| Triple H Wind Project | 250 MW | 55.9 km |
| South Dakota Wind Energy Cente | 41 MW | 66.5 km |
| Big Bend Dam | 538 MW | 78.9 km |