DALLMAN
Partly retiredCoal power plant
- Capacity
- 668 MW
- Primary fuel
- Coal
- County
- Sangamon County
- Operator
- CITY OF SPRINGFIELD - (IL)
- EIA plant ID
- 963
- Generators
- 1
- Technology
- Conventional Steam Coal
- Net generation (2024)
- 547 GWh
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 39.7552, -89.6015
DALLMAN, a partly retired 668 MW Coal power plant in Sangamon County, Illinois. Most of its capacity was retired, most recently in 2024, according to EIA-860.
How DALLMAN compares
EIA-860 lists 230 MW still operable at the site (conventional steam coal), against the 668 MW recorded for it. Its operator, CITY OF SPRINGFIELD - (IL), runs 5 operating plants in Illinois totaling 418 MW. It shares Sangamon County with 4 other operating plants, including INTERSTATE and FACTORY.
EIA-860 lists 1 generator at the site with 230 MW of nameplate capacity, all conventional steam coal technology (this page's HIFLD capacity figure is 668 MW). Net generation was 547 GWh in 2024, down 56% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 138 kV line, under 0.1 miles away. Another 6 operating power plants totaling 1,510 MW sit within 25 miles; the largest is KINCAID GENERATION LLC (1,319 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
DALLMAN is a partly retired 668 MW coal power plant in Sangamon County, IL, operated by CITY OF SPRINGFIELD - (IL). Sangamon County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.5 of 5 at the 63rd national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 85th 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.
Sangamon County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 85th | 4.4 of 5 | <0.01 |
| Tornado | Relatively High | 82nd | 4.3 of 5 | 0.93 |
| Hail | Relatively High | 69th | 3.8 of 5 | 3.7 |
| Winter weather | Relatively High | 50th | 3.0 of 5 | 8.9 |
| Lightning | Relatively High | 50th | 3.0 of 5 | 47.7 |
| Ice storm | Relatively Moderate | 45th | 2.8 of 5 | 1.5 |
| Strong wind | Relatively High | 37th | 2.5 of 5 | 5.3 |
| Heat wave | Relatively Moderate | 37th | 2.5 of 5 | 8.3 |
| Riverine flooding | Relatively Moderate | 35th | 2.4 of 5 | 2.2 |
| Hurricane | Very Low | 13th | 1.5 of 5 | <0.01 |
| Wildfire | Very Low | 13th | 1.5 of 5 | <0.01 |
Perils not assessed in Sangamon 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 Sangamon 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.