Prairie Wind Farm
Mahaska County, Iowa · EIA plant ID 60873 · Operator: MidAmerican Energy Co
Nameplate168MWSummer 169 MW
Generators1in service
Net generation605GWh12 mo to Aug 2026
Capacity factor41%wind units, summer MW
Heat rate—thermal plants only
First online2018
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), wind 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) |
|---|---|---|---|
| 2018 | 546.3 | 37.1% | — |
| 2019 | 536.6 | 36.5% | — |
| 2020 | 527.3 | 34.4% | — |
| 2021 | 592.4 | 38.7% | — |
| 2022 | 639.3 | 43.2% | — |
| 2023 | 567.5 | 38.3% | — |
| 2024 | 595 | 40.1% | — |
| 2025 | 591.8 | 40.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PWE | Onshore Wind Turbine | WT | 168 | 169 | Jan 2018 | Operating | — | vestas V110-2.0 |
Owner / operator
Operator: MidAmerican Energy Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| MidAmerican Energy Co | 100.0% | 168 MW |
Nearby plants
Within 80 km.
| Pella Peaking | 28 MW | 19.7 km |
| Montezuma | 10 MW | 22.4 km |
| Red Rock Hydro Plant | 55 MW | 24.3 km |
| North English | 340 MW | 28.5 km |
| English Farms | 172 MW | 28.8 km |
| Knoxville Battery Energy Storage | 1 MW | 32.7 km |