NINE MILE
OperatingHydro power plant
- Capacity
- 26 MW
- Primary fuel
- Hydro
- County
- Spokane County
- Operator
- AVISTA CORP
- Status
- Operating
- Commissioned
- 1908
- EIA plant ID
- 3869
- Coordinates
- 47.7749, -117.5443
NINE MILE, a 26 MW Hydro power plant in Spokane County, Washington. Operated by AVISTA CORP, commissioned 1908.
Weather peril exposure
NINE MILE is a 26 MW hydro power plant in Spokane County, WA, operated by AVISTA CORP, commissioned in 1908. Spokane County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.0 of 5 at the 1st national percentile. Wildfire is the leading peril, rated Relatively Moderate by FEMA at the 90th 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.
Spokane County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively Moderate | 90th | 4.6 of 5 | <0.01 |
| Heat wave | Relatively Moderate | 60th | 3.4 of 5 | 3.9 |
| Earthquake | Relatively Low | 50th | 3.0 of 5 | <0.01 |
| Ice storm | Very High | 23rd | 1.9 of 5 | 0.33 |
| Strong wind | Relatively High | 19th | 1.8 of 5 | 0.25 |
| Winter weather | Relatively High | 16th | 1.6 of 5 | 18.8 |
| Riverine flooding | Relatively Moderate | 14th | 1.5 of 5 | 1.2 |
| Tornado | Relatively Low | 7th | 1.3 of 5 | 0.08 |
| Lightning | Relatively Moderate | 2nd | 1.1 of 5 | 16.2 |
| Hail | Relatively Low | 2nd | 1.1 of 5 | 0.26 |
Perils not assessed in Spokane 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 Spokane 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.