DETROIT
OperatingHydro power plant
- Capacity
- 100 MW
- Primary fuel
- Hydro
- County
- Marion County
- Operator
- USACE NORTHWESTERN DIVISION
- Status
- Operating
- Commissioned
- 1953
- EIA plant ID
- 3077
- Generators
- 2
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 220 GWh
- Capacity factor (2024, EIA nameplate)
- 25%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 44.7225, -122.2512
DETROIT, a 100 MW Hydro power plant in Marion County, Oregon. Operated by USACE NORTHWESTERN DIVISION, commissioned 1953.
How DETROIT compares
With 100 MW of capacity, DETROIT ranks 29th among the 130 operating power plants Bywatts maps in Oregon and 11th of the 58 operating Hydro plants in the state. It accounts for about 1.2% of Oregon's operating Hydro capacity and 0.7% of all operating capacity in the state. Nationally it is the 179th-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1953, it is older than 83% of the 128 operating Oregon plants with a recorded commissioning year. Its operator, USACE NORTHWESTERN DIVISION, runs 13 operating plants in Oregon totaling 6,521 MW. It shares Marion County with 2 other operating plants, BIG CLIFF and COVANTA MARION INC.
EIA-860 lists 2 generators at the site with 100 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 220 GWh in 2024 (a 25% capacity factor), up 20% from 2022.
Grid neighborhood
The nearest named substation is DETROIT (230 kV), about 0.2 miles away; the closest transmission line found within 10 miles is a 230 kV line owned by BONNEVILLE POWER ADMINISTRATION, under 0.1 miles away. Another 5 operating power plants totaling 124 MW sit within 25 miles; the largest is GREEN PETER (80 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
DETROIT is a 100 MW hydro power plant in Marion County, OR, operated by USACE NORTHWESTERN DIVISION, commissioned in 1953. Marion 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 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.
Marion County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Earthquake | Relatively High | 97th | 4.9 of 5 | 0.02 |
| Heat wave | Relatively Moderate | 67th | 3.7 of 5 | 5.6 |
| Strong wind | Relatively High | 53rd | 3.1 of 5 | 0.06 |
| Wildfire | Very Low | 35th | 2.4 of 5 | <0.01 |
| Ice storm | Relatively Moderate | 26th | 2.1 of 5 | 0.64 |
| Hail | Relatively Low | 14th | 1.6 of 5 | 0.13 |
| Riverine flooding | Relatively Moderate | 13th | 1.5 of 5 | 0.71 |
| Lightning | Relatively High | 6th | 1.2 of 5 | 7.3 |
| Winter weather | Relatively Moderate | 5th | 1.2 of 5 | 18.4 |
| Tornado | Very Low | 2nd | 1.1 of 5 | 0.10 |
Perils not assessed in Marion 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 Marion 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.