Southern Hills Wind Farm
Union County, Iowa · EIA plant ID 63640 · Operator: MidAmerican Energy Co
Nameplate254MWSummer 250 MW
Generators1in service
Net generation805GWh12 mo to Aug 2026
Capacity factor37%wind units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 607.5 | 32.6% | — |
| 2022 | 901.7 | 41.2% | — |
| 2023 | 760.9 | 34.7% | — |
| 2024 | 835.9 | 38.1% | — |
| 2025 | 814.4 | 37.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SHWF | Onshore Wind Turbine | WT | 254.1 | 250 | Mar 2021 | Operating | — | vestas V136-4.2 |
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% | 254 MW |
Nearby plants
Within 80 km.
| Creston School Customer Hosted Solar | 1 MW | 8.8 km |
| Summit Lake | 119 MW | 10 km |
| Orient Wind Farm | 501 MW | 10.9 km |
| Prescott Wind Farm | 39 MW | 11.6 km |
| Bulldog | 2 MW | 12.9 km |
| Cumberland Rose | 2 MW | 13.1 km |