WEEKS FALLS
OperatingHydro power plant
- Capacity
- 4 MW
- Primary fuel
- Hydro
- County
- King County
- Operator
- CHI WEST INC
- Status
- Operating
- Commissioned
- 1990
- EIA plant ID
- 54387
- Coordinates
- 47.4324, -121.6460
WEEKS FALLS, a 4 MW Hydro power plant in King County, Washington. Operated by CHI WEST INC, commissioned 1990.
Weather peril exposure
WEEKS FALLS is a 4 MW hydro power plant in King County, WA, operated by CHI WEST INC, commissioned in 1990. King County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.1 of 5 at the 4th national percentile. Earthquake is the leading peril, rated Very 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.
King County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Very High | 99th | 5.0 of 5 | 0.05 |
| Heat wave | Relatively High | 51st | 3.1 of 5 | 3.8 |
| Riverine flooding | Very High | 46th | 2.8 of 5 | 0.29 |
| Coastal flooding | Relatively Moderate | 45th | 2.8 of 5 | 3.2 |
| Wildfire | Relatively Low | 32nd | 2.3 of 5 | <0.01 |
| Ice storm | Relatively High | 29th | 2.1 of 5 | 0.77 |
| Winter weather | Relatively High | 20th | 1.8 of 5 | 26.9 |
| Tornado | Relatively Moderate | 5th | 1.2 of 5 | 0.07 |
| Lightning | Relatively Moderate | 2nd | 1.1 of 5 | 9.9 |
| Strong wind | Very Low | 0th | 1.0 of 5 | 0.01 |
| Hail | Very Low | 0th | 1.0 of 5 | 0.03 |
Perils not assessed in King 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 King 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.