Eclipse Wind Farm
Guthrie County, Iowa · EIA plant ID 57873 · Operator: MidAmerican Energy Co
Nameplate207MWSummer 200 MW
Generators1in service
Net generation822GWh12 mo to Aug 2026
Capacity factor47%wind units, summer MW
Heat rate—thermal plants only
First online2012
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) |
|---|---|---|---|
| 2012 | 246.5 | 42.1% | — |
| 2013 | 727.3 | 41.5% | — |
| 2014 | 757.4 | 43.2% | — |
| 2015 | 740.4 | 42.3% | — |
| 2016 | 747.5 | 42.5% | — |
| 2017 | 717 | 40.9% | — |
| 2018 | 638.9 | 36.5% | — |
| 2019 | 633.4 | 36.1% | — |
| 2020 | 676.6 | 38.5% | — |
| 2021 | 680.9 | 38.9% | — |
| 2022 | 694.4 | 39.6% | — |
| 2023 | 754.2 | 43.0% | — |
| 2024 | 759.2 | 43.2% | — |
| 2025 | 832 | 47.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EWF | Onshore Wind Turbine | WT | 207.1 | 200 | Sep 2012 | 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% | 207 MW |
Nearby plants
Within 80 km.
| Anita | 3 MW | 14 km |
| Morning Light Wind Farm | 111 MW | 14.4 km |
| Adair Wind Farm | 175 MW | 14.7 km |
| Heartland Divide Wind Project, LLC | 104 MW | 20 km |
| Exira | 182 MW | 20 km |
| Green Energy Machine | 2 MW | 21 km |