Orient Wind Farm
Adair County, Iowa · EIA plant ID 61077 · Operator: MidAmerican Energy Co
Nameplate501MWSummer 500 MW
Generators2in service
Net generation1,799GWh12 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) |
|---|---|---|---|
| 2019 | 683.8 | 57.5% | — |
| 2020 | 1,704.1 | 38.7% | — |
| 2021 | 1,848.5 | 42.1% | — |
| 2022 | 2,140.5 | 48.9% | — |
| 2023 | 1,740.5 | 39.7% | — |
| 2024 | 1,806 | 41.1% | — |
| 2025 | 1,819.8 | 41.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Onshore Wind Turbine | WT | 102 | 100 | Dec 2018 | Operating | — | vestas V110-2.0 |
| 2 | Onshore Wind Turbine | WT | 398.8 | 400 | Dec 2019 | 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% | 501 MW |
Nearby plants
Within 80 km.
| Cumberland Rose | 2 MW | 3.1 km |
| Bulldog | 2 MW | 3.3 km |
| Southern Hills Wind Farm | 254 MW | 10.9 km |
| Greenfield Wind | 2 MW | 11.3 km |
| Sky Volt | 2 MW | 11.3 km |
| Summit Lake | 119 MW | 11.5 km |