Creston Solar (50 MW)
Union County, Iowa · EIA plant ID 67536 · Operator: Interstate Power and Light Co
Nameplate50MWSummer 50 MW
Generators1in service
Net generation94GWh12 mo to Aug 2026
Capacity factor21%solar units, summer MW
Heat rate—thermal plants only
First online2024
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), solar 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) |
|---|---|---|---|
| 2024 | 13.5 | 12.2% | — |
| 2025 | 97 | 22.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | PV | 50 | 50 | Oct 2024 | Operating | — | coming soon |
Owner / operator
Operator: Interstate Power and Light Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Interstate Power and Light Co | 100.0% | 50 MW |
Nearby plants
Within 80 km.
| Creston School Customer Hosted Solar | 1 MW | 4.7 km |
| Summit Lake | 119 MW | 5.3 km |
| Southern Hills Wind Farm | 254 MW | 13.2 km |
| Orient Wind Farm | 501 MW | 16.8 km |
| Cumberland Rose | 2 MW | 19.9 km |
| Bulldog | 2 MW | 20 km |