HARRY D MATTISON GAS PLANT
OperatingNatural Gas power plant
- Capacity
- 349 MW
- Primary fuel
- Natural Gas
- County
- Washington County
- Operator
- SOUTHWESTERN ELECTRIC POWER CO
- Status
- Operating
- Commissioned
- 2007
- EIA plant ID
- 56328
- Generators
- 4
- Technology
- Natural Gas Fired Combustion Turbine
- Net generation (2024)
- 279 GWh
- Capacity factor (2024, EIA nameplate)
- 9.1%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 36.1855, -94.2844
HARRY D MATTISON GAS PLANT, a 349 MW Natural Gas power plant in Washington County, Arkansas. Operated by SOUTHWESTERN ELECTRIC POWER CO, commissioned 2007.
How HARRY D MATTISON GAS PLANT compares
With 349 MW of capacity, HARRY D MATTISON GAS PLANT ranks 13th among the 48 operating power plants Bywatts maps in Arkansas and 7th of the 15 operating Natural Gas plants in the state. It accounts for about 4.8% of Arkansas's operating Natural Gas capacity and 2.1% of all operating capacity in the state. Nationally it is the 413th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2007, it is newer than 81% of the 48 operating Arkansas plants with a recorded commissioning year. Its operator, SOUTHWESTERN ELECTRIC POWER CO, runs 3 operating plants in Arkansas totaling 1,516 MW. It shares Washington County with 2 other operating plants, ELKINS GENERATING CENTER and WASTE MANAGEMENT ECO VISTA LFGTE.
EIA-860 lists 4 generators at the site with 349 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 279 GWh in 2024 (a 9.1% capacity factor), up 35% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 161 kV line, under 0.1 miles away. Another 3 operating power plants totaling 606 MW sit within 25 miles; the largest is FLINT CREEK (558 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
HARRY D MATTISON GAS PLANT is a 349 MW natural gas power plant in Washington County, AR, operated by SOUTHWESTERN ELECTRIC POWER CO, commissioned in 2007. Washington County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.8 of 5 at the 70th national percentile. Ice storm is the leading peril, rated Very High by FEMA at the 97th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Washington County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Ice storm | Very High | 97th | 4.9 of 5 | 1.9 |
| Winter weather | Very High | 90th | 4.6 of 5 | 10.6 |
| Wildfire | Relatively Moderate | 85th | 4.4 of 5 | <0.01 |
| Hail | Relatively High | 73rd | 3.9 of 5 | 7.3 |
| Earthquake | Relatively Low | 64th | 3.5 of 5 | <0.01 |
| Heat wave | Relatively High | 58th | 3.3 of 5 | 9.4 |
| Lightning | Relatively High | 48th | 2.9 of 5 | 58.4 |
| Riverine flooding | Relatively Moderate | 42nd | 2.7 of 5 | 2.7 |
| Tornado | Relatively High | 30th | 2.2 of 5 | 0.81 |
| Hurricane | Very Low | 29th | 2.2 of 5 | 0.01 |
| Strong wind | Relatively Moderate | 8th | 1.3 of 5 | 5.9 |
Perils not assessed in Washington 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 Washington 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.