Highland Wind Project (IA)
O'Brien County, Iowa · EIA plant ID 58883 · Operator: MidAmerican Energy Co
Nameplate502MWSummer 500 MW
Generators7in service
Net generation951GWh12 mo to Aug 2026
Capacity factor22%wind units, summer MW
Heat rate—thermal plants only
First online2015
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) |
|---|---|---|---|
| 2015 | 549.9 | 39.7% | — |
| 2016 | 1,809.7 | 42.0% | — |
| 2017 | 1,726.1 | 40.1% | — |
| 2018 | 1,545.2 | 35.9% | — |
| 2019 | 1,461.1 | 33.2% | — |
| 2020 | 1,518.4 | 34.4% | — |
| 2021 | 1,607.2 | 36.5% | — |
| 2022 | 1,872.7 | 45.0% | — |
| 2023 | 1,616.4 | 38.9% | — |
| 2024 | 1,648.1 | 37.5% | — |
| 2025 | 1,554.4 | 35.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| HLWF | Onshore Wind Turbine | WT | 16.4 | 16.4 | Jun 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF2 | Onshore Wind Turbine | WT | 100.8 | 100 | Jul 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF3 | Onshore Wind Turbine | WT | 89.1 | 89.1 | Aug 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF4 | Onshore Wind Turbine | WT | 89.2 | 89 | Sep 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF5 | Onshore Wind Turbine | WT | 115 | 115 | Oct 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF6 | Onshore Wind Turbine | WT | 86.8 | 85.8 | Nov 2015 | Operating | — | siemens SWT-2.3-108 |
| HLWF7 | Onshore Wind Turbine | WT | 4.7 | 4.7 | Dec 2015 | 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% | 502 MW |
Nearby plants
Within 80 km.
| Primghar | 2 MW | 2.6 km |
| O'Brien Wind | 250 MW | 13.6 km |
| Otter Creek Ethanol Poet - Ashton | 8 MW | 25 km |
| Glaciers Edge Wind Project | 212 MW | 26 km |
| Upland Prairie | 299 MW | 28.6 km |
| Storm Lake II | 80 MW | 33.5 km |