LEWIS & CLARK
Partly retiredCoal power plant
- Capacity
- 50 MW
- Primary fuel
- Coal
- County
- Richland County
- Operator
- MONTANA-DAKOTA UTILITIES CO
- EIA plant ID
- 6089
- Generators
- 2
- Net generation (2024)
- 1.8 GWh
- Capacity factor (2024, EIA nameplate)
- 1.1%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 47.6789, -104.1576
LEWIS & CLARK, a partly retired 50 MW Coal power plant in Richland County, Montana. Most of its capacity was retired, most recently in 2021, according to EIA-860.
How LEWIS & CLARK compares
EIA-860 lists 19 MW still operable at the site (natural gas internal combustion engine), against the 50 MW recorded for it. Its operator, MONTANA-DAKOTA UTILITIES CO, runs 3 operating plants in Montana totaling 139 MW.
Under the same EIA plant code, EIA-860 lists 2 generators at the site with 19 MW of nameplate capacity (this page's HIFLD capacity figure is 50 MW). Net generation was 1.8 GWh in 2024 (a 1.1% capacity factor).
Grid neighborhood
The nearest named substation is EAST SIDNEY, about 3.8 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by MONTANA-DAKOTA UTILITIES CO, under 0.1 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
LEWIS & CLARK is a partly retired 50 MW coal power plant in Richland County, MT, operated by MONTANA-DAKOTA UTILITIES CO. Richland County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.8 of 5 at the 46th national percentile. Winter weather is the leading peril, rated Relatively Moderate by FEMA at the 97th 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.
Richland County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Winter weather | Relatively Moderate | 97th | 4.9 of 5 | 18.9 |
| Heat wave | Relatively Low | 86th | 4.5 of 5 | 2.5 |
| Ice storm | Relatively Low | 68th | 3.7 of 5 | 0.12 |
| Wildfire | Very Low | 62nd | 3.5 of 5 | <0.01 |
| Strong wind | Relatively Low | 61st | 3.4 of 5 | 1.6 |
| Hail | Relatively Low | 57th | 3.3 of 5 | 2.1 |
| Riverine flooding | Very Low | 51st | 3.0 of 5 | 1.1 |
| Tornado | Relatively Low | 40th | 2.6 of 5 | 0.23 |
| Lightning | Relatively Low | 16th | 1.7 of 5 | 27.3 |
| Earthquake | Very Low | 9th | 1.4 of 5 | <0.01 |
Perils not assessed in Richland 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 |
|---|---|
| Hurricane | FEMA rating is "Not Applicable" for this county |
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Richland 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.