Macksburg Wind Project
Madison County, Iowa · EIA plant ID 58885 · Operator: MidAmerican Energy Co
Nameplate120MWSummer 120 MW
Generators1in service
Net generation249GWh12 mo to Dec 2025
Capacity factor24%wind units, summer MW
Heat rate—thermal plants only
First online2014
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) |
|---|---|---|---|
| 2014 | 19.7 | 22.1% | — |
| 2015 | 388.9 | 37.1% | — |
| 2016 | 374.5 | 35.6% | — |
| 2017 | 367.5 | 35.1% | — |
| 2018 | 340.8 | 32.5% | — |
| 2019 | 336.1 | 32.1% | — |
| 2020 | 320.7 | 30.5% | — |
| 2021 | 306.1 | 29.2% | — |
| 2022 | 376.3 | 35.9% | — |
| 2023 | 322.3 | 30.8% | — |
| 2024 | 329.9 | 31.4% | — |
| 2025 | 248.7 | 23.7% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MBWF | Onshore Wind Turbine | WT | 119.6 | 119.6 | Dec 2014 | 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% | 120 MW |
Nearby plants
Within 80 km.
| Winterset | 18 MW | 16.1 km |
| Summit Lake | 119 MW | 23 km |
| Creston Solar (50 MW) | 50 MW | 23.7 km |
| Arbor Hill Wind Farm | 310 MW | 25.4 km |
| Orient Wind Farm | 501 MW | 26.2 km |
| Creston School Customer Hosted Solar | 1 MW | 27.2 km |