O'Brien Wind
O'Brien County, Iowa · EIA plant ID 60326 · Operator: MidAmerican Energy Co
Nameplate250MWSummer 250 MW
Generators3in service
Net generation851GWh12 mo to Dec 2025
Capacity factor39%wind 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), 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) |
|---|---|---|---|
| 2016 | 224.9 | 70.0% | — |
| 2017 | 895.8 | 40.9% | — |
| 2018 | 814.6 | 37.1% | — |
| 2019 | 750.5 | 34.2% | — |
| 2020 | 803.3 | 36.5% | — |
| 2021 | 822 | 37.5% | — |
| 2022 | 987.1 | 45.0% | — |
| 2023 | 834.6 | 38.1% | — |
| 2024 | 875.9 | 39.8% | — |
| 2025 | 851.2 | 38.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| OBWF | Onshore Wind Turbine | WT | 61.9 | 61.9 | Sep 2016 | Operating | — | siemens SWT-2.3-108 |
| OBWF2 | Onshore Wind Turbine | WT | 108.7 | 108.7 | Dec 2016 | Operating | — | siemens SWT-2.3-108 |
| OBWF3 | Onshore Wind Turbine | WT | 79.7 | 79.7 | Dec 2016 | Operating | — | siemens SWT-2.3-108 |
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% | 250 MW |
Nearby plants
Within 80 km.
| Primghar | 2 MW | 12.6 km |
| Highland Wind Project (IA) | 502 MW | 13.6 km |
| Otter Creek Ethanol Poet - Ashton | 8 MW | 17.2 km |
| Allendorf | 6 MW | 22.2 km |
| Upland Prairie | 299 MW | 22.3 km |
| Sibley No Two | 1 MW | 24.1 km |