ROCKY REACH
OperatingHydro power plant
- Capacity
- 1,300 MW
- Primary fuel
- Hydro
- County
- Chelan County
- Operator
- PUD NO 1 OF CHELAN COUNTY
- Status
- Operating
- Commissioned
- 1961
- EIA plant ID
- 3883
- Coordinates
- 47.5330, -120.2940
ROCKY REACH, a 1,300 MW Hydro power plant in Chelan County, Washington. Operated by PUD NO 1 OF CHELAN COUNTY, commissioned 1961.
Weather peril exposure
ROCKY REACH is a 1,300 MW hydro power plant in Chelan County, WA, operated by PUD NO 1 OF CHELAN COUNTY, commissioned in 1961. Chelan County carries moderate modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.5 of 5 at the 36th national percentile. Wildfire is the leading peril, rated Relatively High by FEMA at the 100th 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.
Chelan County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Wildfire | Relatively High | 100th | 5.0 of 5 | 0.02 |
| Riverine flooding | Relatively Moderate | 95th | 4.8 of 5 | 1.5 |
| Earthquake | Relatively Low | 85th | 4.4 of 5 | <0.01 |
| Heat wave | Relatively Low | 62nd | 3.5 of 5 | 3.7 |
| Winter weather | Relatively Moderate | 40th | 2.6 of 5 | 26.4 |
| Lightning | Relatively High | 7th | 1.3 of 5 | 9.9 |
| Strong wind | Very Low | 4th | 1.2 of 5 | 0.06 |
| Tornado | Very Low | 4th | 1.2 of 5 | 0.05 |
| Ice storm | Very Low | 4th | 1.2 of 5 | 0.07 |
| Hail | Relatively Low | 4th | 1.1 of 5 | 0.07 |
Perils not assessed in Chelan 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 Chelan 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.