THE DALLES
OperatingHydro power plant
- Capacity
- 1,820 MW
- Primary fuel
- Hydro
- County
- Wasco County
- Operator
- USACE NORTHWESTERN DIVISION
- Status
- Operating
- Commissioned
- 1957
- EIA plant ID
- 3895
- Coordinates
- 45.6176, -121.1240
THE DALLES, a 1,820 MW Hydro power plant in Wasco County, Oregon. Operated by USACE NORTHWESTERN DIVISION, commissioned 1957.
Weather peril exposure
THE DALLES is a 1,820 MW hydro power plant in Wasco County, OR, operated by USACE NORTHWESTERN DIVISION, commissioned in 1957. Wasco County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.2 of 5 at the 31st national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 99th 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.
Wasco County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 99th | 5.0 of 5 | 0.02 |
| Earthquake | Relatively Low | 88th | 4.5 of 5 | <0.01 |
| Riverine flooding | Relatively Low | 79th | 4.2 of 5 | 0.11 |
| Heat wave | Relatively Low | 64th | 3.6 of 5 | 3.5 |
| Strong wind | Very Low | 34th | 2.4 of 5 | 0.10 |
| Hail | Very Low | 22nd | 1.9 of 5 | 0.25 |
| Ice storm | Relatively High | 16th | 1.6 of 5 | 0.25 |
| Winter weather | Relatively Low | 9th | 1.3 of 5 | 13.3 |
| Lightning | Relatively Low | 7th | 1.3 of 5 | 8.0 |
| Tornado | Very Low | 4th | 1.2 of 5 | 0.06 |
Perils not assessed in Wasco 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 Wasco 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.