Walter Scott Jr Energy Center
Pottawattamie County, Iowa · EIA plant ID 1082 · Operator: MidAmerican Energy Co
Nameplate1,648MWSummer 1,512 MW
Generators2in service
Net generation7,713GWh12 mo to Aug 2026
Capacity factor58%gas/coal/oil units, summer MW
Heat rate9,977Btu/kWhfossil units, electric fuel, HHV
First online1978Runs as baseload
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 5,910.9 | 83.7% | 10,578 |
| 2002 | 5,794.2 | 82.1% | 10,373 |
| 2003 | 6,146 | 85.3% | 10,142 |
| 2004 | 5,603.4 | 77.5% | 10,250 |
| 2005 | 6,244.7 | 86.6% | 10,312 |
| 2006 | 5,234.4 | 72.6% | 10,355 |
| 2007 | 9,167.6 | 81.0% | 9,765 |
| 2008 | 11,829.9 | 83.0% | 9,599 |
| 2009 | 11,238.2 | 79.0% | 9,964 |
| 2010 | 12,095.6 | 83.2% | 10,160 |
| 2011 | 11,987.3 | 83.4% | 10,042 |
| 2012 | 11,504.2 | 80.1% | 9,953 |
| 2013 | 10,947.2 | 76.4% | 10,248 |
| 2014 | 10,799.5 | 75.4% | 10,290 |
| 2015 | 9,586.3 | 71.2% | 10,129 |
| 2016 | 8,695.4 | 65.2% | 9,794 |
| 2017 | 8,563.4 | 64.4% | 9,921 |
| 2018 | 10,039.9 | 75.3% | 9,786 |
| 2019 | 8,014.2 | 60.4% | 9,930 |
| 2020 | 4,953.3 | 37.1% | 10,118 |
| 2021 | 6,362.8 | 47.9% | 9,998 |
| 2022 | 6,579.7 | 49.8% | 10,047 |
| 2023 | 5,700.3 | 43.0% | 10,101 |
| 2024 | 6,385.2 | 48.1% | 10,112 |
| 2025 | 5,979 | 45.1% | 10,076 |
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 |
|---|---|---|---|---|---|---|---|---|
| 3 | Conventional Steam Coal | ST | 725.8 | 705.9 | Dec 1978 | Operating | — | coming soon |
| 4 | Conventional Steam Coal | ST | 922.5 | 805.8 | Jun 2007 | Operating | — | coming soon |
| 1 | Conventional Steam Coal | ST | 49 | 37.4 | Mar 1954 | Retired Mar 2015 | — | coming soon |
| 2 | Conventional Steam Coal | ST | 81.6 | 80.8 | Oct 1958 | Retired Mar 2015 | — | 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).
| MidAmerican Energy Co | 68.2% | 1,125 MW |
| Central Iowa Power Cooperative | 10.4% | 172 MW |
| Lincoln Electric System | 7.1% | 117 MW |
| Corn Belt Power Coop | 4.8% | 79 MW |
| Municipal Energy Agency of NE | 3.9% | 64 MW |
| Cedar Falls Utilities | 2.6% | 42 MW |
| Atlantic Municipal Utilities (IA) | 1.1% | 18 MW |
| City of Spencer - (IA) | 0.6% | 11 MW |
| City of New Hampton - (IA) | 0.3% | 5 MW |
| Eldridge City Utilities | 0.3% | 5 MW |
| Town of Montezuma - (IN) | 0.2% | 4 MW |
| Waverly Municipal Elec Utility - (IA) | 0.2% | 4 MW |
| City of Alta - (IA) | 0.1% | 1 MW |
| City of West Bend - (IA) | 0.1% | 1 MW |
| City of Sumner - (IA) | 0.1% | 1 MW |
Nearby plants
Within 80 km.
| Missouri River Wastewater Treatment | 3 MW | 7.8 km |
| Jones Street | 130 MW | 10.5 km |
| Sarpy County | 338 MW | 10.9 km |
| Papillion Creek Wastewater | — | 11.7 km |
| North Omaha | 645 MW | 18.7 km |
| Standing Bear Lake | 163 MW | 26 km |