LAGRANDE
OperatingHydro power plant
- Capacity
- 64 MW
- Primary fuel
- Hydro
- County
- Pierce County
- Operator
- CITY OF TACOMA - (WA)
- Status
- Operating
- Commissioned
- 1912
- EIA plant ID
- 3916
- Generators
- 5
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 297 GWh
- Capacity factor (2024, EIA nameplate)
- 53%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 46.8340, -122.3241
LAGRANDE, a 64 MW Hydro power plant in Pierce County, Washington. Operated by CITY OF TACOMA - (WA), commissioned 1912.
How LAGRANDE compares
With 64 MW of capacity, LAGRANDE ranks 61st among the 126 operating power plants Bywatts maps in Washington and 29th of the 65 operating Hydro plants in the state. It accounts for about 0.3% of Washington's operating Hydro capacity and 0.2% of all operating capacity in the state. Nationally it is the 246th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1912, it is older than 96% of the 125 operating Washington plants with a recorded commissioning year. Its operator, CITY OF TACOMA - (WA), runs 7 operating plants in Washington totaling 713 MW. It shares Pierce County with 5 other operating plants, including FREDERICKSON POWER LP and FREDERICKSON.
EIA-860 lists 5 generators at the site with 64 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 297 GWh in 2024 (a 53% capacity factor), down 14% from 2022. Its generators came online between 1912 and 1945.
Grid neighborhood
The nearest named substation is LA GRANDE (115 kV), about 0.2 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by CITY OF TACOMA - (WA), under 0.1 miles away. Another 7 operating power plants totaling 882 MW sit within 25 miles; the largest is FREDERICKSON POWER LP (318 MW, Natural Gas). Within 50 miles is one mapped data center, Intergate West / Digital.forest / Fortress in Tukwila, about 45.6 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
LAGRANDE is a 64 MW hydro power plant in Pierce County, WA, operated by CITY OF TACOMA - (WA), commissioned in 1912. Pierce County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 4th national percentile. Earthquake is the leading peril, rated Relatively High by FEMA at the 98th 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.
Pierce County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively High | 98th | 4.9 of 5 | 0.04 |
| Heat wave | Relatively High | 64th | 3.6 of 5 | 3.8 |
| Coastal flooding | Relatively Moderate | 55th | 3.2 of 5 | 3.1 |
| Wildfire | Relatively Low | 38th | 2.5 of 5 | <0.01 |
| Riverine flooding | Relatively High | 30th | 2.2 of 5 | 0.11 |
| Ice storm | Relatively High | 22nd | 1.9 of 5 | 0.64 |
| Strong wind | Relatively Low | 8th | 1.3 of 5 | 0.01 |
| Lightning | Relatively High | 6th | 1.2 of 5 | 9.3 |
| Hail | Very Low | 5th | 1.2 of 5 | 0.03 |
| Winter weather | Relatively Moderate | 4th | 1.2 of 5 | 27.0 |
| Tornado | Relatively Low | 4th | 1.1 of 5 | 0.07 |
Perils not assessed in Pierce 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 Pierce 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.