BOX CANYON
OperatingHydro power plant
- Capacity
- 75 MW
- Primary fuel
- Hydro
- County
- Pend Oreille County
- Operator
- PUD NO 1 OF PEND OREILLE COUNTY
- Status
- Operating
- Commissioned
- 1955
- EIA plant ID
- 3891
- Generators
- 4
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 464 GWh
- Capacity factor (2024, EIA nameplate)
- 59%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 48.7804, -117.4139
BOX CANYON, a 75 MW Hydro power plant in Pend Oreille County, Washington. Operated by PUD NO 1 OF PEND OREILLE COUNTY, commissioned 1955.
How BOX CANYON compares
With 75 MW of capacity, BOX CANYON ranks 57th among the 126 operating power plants Bywatts maps in Washington and 26th of the 65 operating Hydro plants in the state. It accounts for about 0.4% of Washington's operating Hydro capacity and 0.2% of all operating capacity in the state. Nationally it is the 217th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1955, it is older than 78% of the 125 operating Washington plants with a recorded commissioning year. It shares Pend Oreille County with one other operating plant, BOUNDARY.
EIA-860 lists 4 generators at the site with 90 MW of nameplate capacity, all conventional hydroelectric technology (this page's HIFLD capacity figure is 75 MW). Net generation was 464 GWh in 2024 (a 59% capacity factor), up 3% from 2022.
Grid neighborhood
The nearest named substation is METALINE FALLS (115 kV), about 6.2 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by PUD NO 1 OF PEND OREILLE COUNTY, under 0.1 miles away. Another 2 operating power plants totaling 1,041 MW sit within 25 miles; the largest is BOUNDARY (1,040 MW, Hydro).
Computed by Bywatts from HIFLD power plant, substation and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology
Weather peril exposure
BOX CANYON is a 75 MW hydro power plant in Pend Oreille County, WA, operated by PUD NO 1 OF PEND OREILLE COUNTY, commissioned in 1955. 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.