H M JACKSON
OperatingHydro power plant
- Capacity
- 112 MW
- Primary fuel
- Hydro
- County
- Snohomish County
- Operator
- SNOHOMISH COUNTY PUD NO 1
- Status
- Operating
- Commissioned
- 1984
- EIA plant ID
- 7588
- Coordinates
- 47.9085, -121.8144
H M JACKSON, a 112 MW Hydro power plant in Snohomish County, Washington. Operated by SNOHOMISH COUNTY PUD NO 1, commissioned 1984.
Weather peril exposure
H M JACKSON is a 112 MW hydro power plant in Snohomish County, WA, operated by SNOHOMISH COUNTY PUD NO 1, commissioned in 1984. Snohomish County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 5th national percentile. Earthquake is the leading peril, rated Relatively High by FEMA at the 97th 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.
Snohomish County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively High | 97th | 4.9 of 5 | 0.04 |
| Coastal flooding | Relatively Moderate | 69th | 3.8 of 5 | 3.2 |
| Heat wave | Relatively High | 62nd | 3.5 of 5 | 3.4 |
| Riverine flooding | Relatively High | 31st | 2.2 of 5 | 0.39 |
| Ice storm | Very High | 28th | 2.1 of 5 | 0.45 |
| Wildfire | Very Low | 23rd | 1.9 of 5 | <0.01 |
| Winter weather | Relatively High | 14th | 1.5 of 5 | 31.9 |
| Hail | Very Low | 5th | 1.2 of 5 | 0.03 |
| Lightning | Relatively High | 5th | 1.2 of 5 | 8.6 |
| Tornado | Relatively Low | 5th | 1.2 of 5 | 0.05 |
| Strong wind | Very Low | 1st | 1.0 of 5 | 0.02 |
Perils not assessed in Snohomish 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 Snohomish 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.