LOUISA
OperatingCoal power plant
- Capacity
- 812 MW
- Primary fuel
- Coal
- County
- Louisa County
- Operator
- MIDAMERICAN ENERGY CO
- Status
- Operating
- Commissioned
- 1983
- EIA plant ID
- 6664
- Generators
- 1
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 2,722 GWh
- Capacity factor (2024, EIA nameplate)
- 38%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 41.3174, -91.0933
LOUISA, an 812 MW Coal power plant in Louisa County, Iowa. Operated by MIDAMERICAN ENERGY CO, commissioned 1983.
How LOUISA compares
With 812 MW of capacity, LOUISA ranks 3rd among the 198 operating power plants Bywatts maps in Iowa and 3rd of the 19 operating Coal plants in the state. It accounts for about 12% of Iowa's operating Coal capacity and 5.2% of all operating capacity in the state. Nationally it is the 125th-largest of the 324 operating Coal plants in the database. Commissioned in 1983, it is older than 66% of the 198 operating Iowa plants with a recorded commissioning year. Its operator, MIDAMERICAN ENERGY CO, runs 28 operating plants in Iowa totaling 8,028 MW.
EIA-860 lists 1 generator at the site with 812 MW of nameplate capacity, all conventional steam coal technology. Net generation was 2,722 GWh in 2024 (a 38% capacity factor), down 14% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 345 kV line owned by WAVERLY MUNICIPAL ELEC UTILITY, under 0.1 miles away. Another 4 operating power plants totaling 326 MW sit within 25 miles; the largest is MUSCATINE PLANT #1 (294 MW, Coal).
Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
LOUISA is an 812 MW coal power plant in Louisa County, IA, operated by MIDAMERICAN ENERGY CO, commissioned in 1983. Louisa County carries critical modeled catastrophe exposure in the FEMA National Risk Index, scoring 4.6 of 5 at the 91st national percentile. Strong wind is the leading peril, rated Relatively Moderate by FEMA at the 98th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Louisa County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Strong wind | Relatively Moderate | 98th | 4.9 of 5 | 6.3 |
| Hail | Relatively Low | 92nd | 4.7 of 5 | 4.4 |
| Heat wave | Relatively Low | 90th | 4.6 of 5 | 8.2 |
| Tornado | Relatively Low | 79th | 4.2 of 5 | 0.37 |
| Ice storm | Relatively Low | 71st | 3.9 of 5 | 0.50 |
| Riverine flooding | Very Low | 63rd | 3.5 of 5 | 2.3 |
| Wildfire | Very Low | 56th | 3.3 of 5 | <0.01 |
| Earthquake | Very Low | 45th | 2.8 of 5 | <0.01 |
| Lightning | Relatively Low | 37th | 2.5 of 5 | 45.4 |
| Winter weather | Very Low | 25th | 2.0 of 5 | 13.7 |
| Hurricane | Very Low | 11th | 1.4 of 5 | <0.01 |
Perils not assessed in Louisa County
These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.
| Peril | Why it is not scored |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Louisa County in the weather risk calculator
Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.
Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.