Osceola Windpower II
Osceola County, Iowa · EIA plant ID 56913 · Operator: Osceola Windpower II
Nameplate50MWSummer 50 MW
Generators1in service
Net generation192GWh12 mo to Aug 2026
Capacity factor44%wind units, summer MW
Heat rate—thermal plants only
First online2008
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) |
|---|---|---|---|
| 2008 | 41.7 | 28.5% | — |
| 2009 | 130.4 | 29.8% | — |
| 2010 | 144 | 32.9% | — |
| 2011 | 156.3 | 35.7% | — |
| 2012 | 167.5 | 38.1% | — |
| 2013 | 136 | 31.0% | — |
| 2014 | 157.8 | 36.0% | — |
| 2015 | 137.7 | 31.4% | — |
| 2016 | 150.4 | 34.3% | — |
| 2017 | 150.1 | 34.3% | — |
| 2018 | 129.9 | 29.7% | — |
| 2019 | 151.2 | 34.5% | — |
| 2020 | 201.5 | 46.3% | — |
| 2021 | 183.9 | 42.3% | — |
| 2022 | 220 | 50.6% | — |
| 2023 | 203.6 | 46.9% | — |
| 2024 | 201 | 46.1% | — |
| 2025 | 200.3 | 46.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| CL25 | Onshore Wind Turbine | WT | 49.6 | 49.6 | Sep 2008 | Operating | — | clipper Liberty C96 |
Owner / operator
Operator: Osceola Windpower II. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Osceola Windpower II | 100.0% | 50 MW |
Nearby plants
Within 80 km.
| Osceola Windpower LLC | 98 MW | 0 km |
| Lake Park | 4 MW | 8.2 km |
| Flying Cloud Power Partners LLC | 44 MW | 10.5 km |
| Lost Lakes Wind Farm LLC | 100 MW | 12.1 km |
| South Fork Wind Farm | 14 MW | 17.8 km |
| Allendorf | 6 MW | 17.8 km |