BOUNDARY
OperatingHydro power plant
- Capacity
- 1,040 MW
- Primary fuel
- Hydro
- County
- Pend Oreille County
- Operator
- CITY OF SEATTLE - (WA)
- Status
- Operating
- Commissioned
- 1967
- EIA plant ID
- 6433
- Coordinates
- 48.9869, -117.3487
BOUNDARY, a 1,040 MW Hydro power plant in Pend Oreille County, Washington. Operated by CITY OF SEATTLE - (WA), commissioned 1967.
Weather peril exposure
BOUNDARY is a 1,040 MW hydro power plant in Pend Oreille County, WA, operated by CITY OF SEATTLE - (WA), commissioned in 1967. Pend Oreille County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 5th national percentile. Riverine flooding is the leading peril, rated Relatively Low 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.
Pend Oreille County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Low | 97th | 4.9 of 5 | 0.46 |
| Wildfire | Relatively Low | 81st | 4.2 of 5 | <0.01 |
| Heat wave | Very Low | 58th | 3.3 of 5 | 3.6 |
| Earthquake | Very Low | 35th | 2.4 of 5 | <0.01 |
| Ice storm | Relatively Low | 32nd | 2.3 of 5 | 0.07 |
| Winter weather | Relatively Low | 26th | 2.0 of 5 | 24.4 |
| Lightning | Very Low | 15th | 1.6 of 5 | 22.3 |
| Strong wind | Relatively Low | 14th | 1.5 of 5 | 0.18 |
| Hail | Very Low | 6th | 1.2 of 5 | 0.20 |
| Tornado | Very Low | 6th | 1.2 of 5 | 0.04 |
Perils not assessed in Pend Oreille 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 Pend Oreille 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.