DENISON
OperatingHydro power plant
- Capacity
- 70 MW
- Primary fuel
- Hydro
- County
- Grayson County
- Operator
- USCE-TULSA DISTRICT
- Status
- Operating
- Commissioned
- 1945
- EIA plant ID
- 6416
- Generators
- 2
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 192 GWh
- Capacity factor (2024, EIA nameplate)
- 21%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 33.8179, -96.5693
DENISON, a 70 MW Hydro power plant in Grayson County, Texas. Operated by USCE-TULSA DISTRICT, commissioned 1945.
How DENISON compares
With 70 MW of capacity, DENISON ranks 204th among the 307 operating power plants Bywatts maps in Texas and 3rd of the 22 operating Hydro plants in the state. It accounts for about 10% of Texas's operating Hydro capacity and under 0.1% of all operating capacity in the state. Nationally it is the 233rd-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1945, it is older than 96% of the 303 operating Texas plants with a recorded commissioning year. It shares Grayson County with one other operating plant, PANDA SHERMAN POWER STATION.
EIA-860 lists 2 generators at the site with 104 MW of nameplate capacity, all conventional hydroelectric technology (this page's HIFLD capacity figure is 70 MW). Net generation was 192 GWh in 2024 (a 21% capacity factor), about 2.3 times its 2022 output. Its generators came online between 1945 and 1949.
Grid neighborhood
The closest transmission line found within 10 miles is a 138 kV line owned by SOUTHWESTERN POWER ADMINISTRATION, about 0.1 miles away.
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
DENISON is a 70 MW hydro power plant in Grayson County, TX, operated by USCE-TULSA DISTRICT, commissioned in 1945. Grayson County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.9 of 5 at the 74th national percentile. Ice storm is the leading peril, rated Relatively High by FEMA at the 82nd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a hydro plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Grayson County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Ice storm | Relatively High | 82nd | 4.3 of 5 | 1.2 |
| Hail | Relatively Moderate | 79th | 4.2 of 5 | 8.5 |
| Wildfire | Relatively Low | 63rd | 3.5 of 5 | <0.01 |
| Heat wave | Relatively Moderate | 62nd | 3.5 of 5 | 15.9 |
| Lightning | Relatively Low | 58th | 3.3 of 5 | 54.9 |
| Winter weather | Relatively Low | 57th | 3.3 of 5 | 4.9 |
| Earthquake | Relatively Low | 40th | 2.6 of 5 | <0.01 |
| Tornado | Relatively High | 38th | 2.5 of 5 | 0.88 |
| Hurricane | Very Low | 37th | 2.5 of 5 | 0.01 |
| Riverine flooding | Relatively Moderate | 21st | 1.8 of 5 | 2.2 |
| Strong wind | Relatively Moderate | 20th | 1.8 of 5 | 4.0 |
Perils not assessed in Grayson 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 Grayson 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.