DIABLO
OperatingHydro power plant
- Capacity
- 182 MW
- Primary fuel
- Hydro
- County
- Whatcom County
- Operator
- CITY OF SEATTLE - (WA)
- Status
- Operating
- Commissioned
- 1936
- EIA plant ID
- 6432
- Coordinates
- 48.7157, -121.1414
DIABLO, a 182 MW Hydro power plant in Whatcom County, Washington. Operated by CITY OF SEATTLE - (WA), commissioned 1936.
Weather peril exposure
DIABLO is a 182 MW hydro power plant in Whatcom County, WA, operated by CITY OF SEATTLE - (WA), commissioned in 1936. Whatcom County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.1 of 5 at the 2nd national percentile. Earthquake is the leading peril, rated Relatively Moderate by FEMA at the 95th 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.
Whatcom County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively Moderate | 95th | 4.8 of 5 | 0.02 |
| Coastal flooding | Relatively Moderate | 56th | 3.2 of 5 | 3.6 |
| Heat wave | Relatively Moderate | 49th | 3.0 of 5 | 2.4 |
| Riverine flooding | Relatively Moderate | 46th | 2.9 of 5 | 0.18 |
| Winter weather | Relatively Moderate | 34th | 2.4 of 5 | 37.3 |
| Ice storm | Very High | 32nd | 2.3 of 5 | 0.53 |
| Wildfire | Very Low | 29th | 2.2 of 5 | <0.01 |
| Lightning | Relatively Moderate | 4th | 1.2 of 5 | 8.1 |
| Tornado | Very Low | 3rd | 1.1 of 5 | 0.02 |
| Hail | Very Low | 1st | 1.0 of 5 | 0.01 |
| Strong wind | Very Low | 0th | 1.0 of 5 | <0.01 |
Perils not assessed in Whatcom 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 |
Model hail, wind and flood exposure for Whatcom 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.