UNION POWER PLANT
OperatingNatural Gas power plant
- Capacity
- 2,428 MW
- Primary fuel
- Natural Gas
- County
- Union County
- Operator
- UNION POWER PARTNERS LP
- Status
- Operating
- Commissioned
- 2003
- EIA plant ID
- 55380
- Generators
- 12
- Technology
- Natural Gas Fired Combined Cycle
- Net generation (2024)
- 9,989 GWh
- Capacity factor (2024, EIA nameplate)
- 47%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 33.2981, -92.5870
UNION POWER PLANT, a 2,428 MW Natural Gas power plant in Union County, Arkansas. Operated by UNION POWER PARTNERS LP, commissioned 2003.
How UNION POWER PLANT compares
With 2,428 MW of capacity, UNION POWER PLANT is the largest of the 48 operating power plants Bywatts maps in Arkansas and the largest of the 15 operating Natural Gas plants in the state. It accounts for about 34% of Arkansas's operating Natural Gas capacity and 15% of all operating capacity in the state. Nationally it is the 8th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2003, it is newer than 72% of the 48 operating Arkansas plants with a recorded commissioning year.
EIA-860 lists 12 generators at the site with 2,428 MW of nameplate capacity, all natural gas fired combined cycle technology. Net generation was 9,989 GWh in 2024 (a 47% capacity factor), down 22% from 2022.
Grid neighborhood
The closest transmission line found within 10 miles is a 500 kV line owned by ENTERGY ARKANSAS INC, under 0.1 miles away. One other operating power plant sits within 25 miles: MCCLELLAN (136 MW, Natural Gas).
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
UNION POWER PLANT is a 2,428 MW natural gas power plant in Union County, AR, operated by UNION POWER PARTNERS LP, commissioned in 2003. Union County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.0 of 5 at the 50th national percentile. Ice storm is the leading peril, rated Very High by FEMA at the 98th 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.
Union County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Ice storm | Very High | 98th | 4.9 of 5 | 1.3 |
| Lightning | Relatively Moderate | 96th | 4.9 of 5 | 64.9 |
| Earthquake | Relatively Low | 79th | 4.2 of 5 | <0.01 |
| Strong wind | Relatively Moderate | 72nd | 3.9 of 5 | 3.9 |
| Hurricane | Relatively Low | 58th | 3.3 of 5 | 0.04 |
| Heat wave | Relatively Moderate | 57th | 3.3 of 5 | 19.3 |
| Winter weather | Relatively Low | 52nd | 3.1 of 5 | 3.7 |
| Hail | Relatively Low | 51st | 3.1 of 5 | 3.9 |
| Tornado | Relatively Moderate | 38th | 2.5 of 5 | 0.73 |
| Riverine flooding | Relatively Low | 30th | 2.2 of 5 | 1.3 |
| Wildfire | Very Low | 27th | 2.1 of 5 | <0.01 |
Perils not assessed in Union 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 Union 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.