Mills Solar ProjectUnder construction
Mills County, Iowa · EIA plant ID 70107 · Operator: MidAmerican Energy Co
50 MW under construction (Solar Photovoltaic), first expected Dec 2026 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service · 50 MW building
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
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.
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 |
|---|---|---|---|---|---|---|---|---|
| MSP | Solar Photovoltaic | PV | 50 | 50 | planned Dec 2026 | Under construction | — | coming soon |
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).
Nearby plants
Within 80 km.
| Shenandoah | 20 MW | 29.9 km |
| Papillion Creek Wastewater | — | 35.4 km |
| Walter Scott Jr Energy Center | 1,648 MW | 36.4 km |
| Villisca Municipal Power Plant | 4 MW | 40.8 km |
| Cass County | 345 MW | 44 km |
| Missouri River Wastewater Treatment | 3 MW | 44.2 km |