GREENUP HYDRO
OperatingHydro power plant
- Capacity
- 70 MW
- Primary fuel
- Hydro
- County
- Scioto County
- Operator
- CITY OF HAMILTON - (OH)
- Status
- Operating
- Commissioned
- 1982
- EIA plant ID
- 4258
- Generators
- 3
- Technology
- Conventional Hydroelectric
- Net generation (2024)
- 261 GWh
- Capacity factor (2024, EIA nameplate)
- 42%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 38.6469, -82.8588
GREENUP HYDRO, a 70 MW Hydro power plant in Scioto County, Ohio. Operated by CITY OF HAMILTON - (OH), commissioned 1982.
How GREENUP HYDRO compares
With 70 MW of capacity, GREENUP HYDRO ranks 30th among the 102 operating power plants Bywatts maps in Ohio and is the largest of the 5 operating Hydro plants in the state. It accounts for about 55% of Ohio's operating Hydro capacity and 0.3% of all operating capacity in the state. Nationally it is the 232nd-largest of the 1,243 operating Hydro plants in the database. Commissioned in 1982, it is older than 70% of the 99 operating Ohio plants with a recorded commissioning year. Its operator, CITY OF HAMILTON - (OH), runs 2 operating plants in Ohio totaling 72 MW. It shares Scioto County with one other operating plant, HAVERHILL NORTH COGENERATION FACILITY.
EIA-860 lists 3 generators at the site with 70 MW of nameplate capacity, all conventional hydroelectric technology. Net generation was 261 GWh in 2024 (a 42% capacity factor), down 15% from 2022.
Grid neighborhood
The nearest named substation is HANGING ROCK (765 kV), about 7.1 miles away; the closest transmission line found within 10 miles is a 138 kV line owned by EAST KENTUCKY POWER COOP, INC, under 0.1 miles away. Another 2 operating power plants totaling 1,355 MW sit within 25 miles; the largest is HANGING ROCK ENERGY FACILITY (1,288 MW, Natural Gas).
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
GREENUP HYDRO is a 70 MW hydro power plant in Scioto County, OH, operated by CITY OF HAMILTON - (OH), commissioned in 1982. Scioto County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.7 of 5 at the 18th national percentile. Riverine flooding is the leading peril, rated Relatively Moderate by FEMA at the 85th 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.
Scioto County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Riverine flooding | Relatively Moderate | 85th | 4.4 of 5 | 3.5 |
| Strong wind | Relatively Moderate | 62nd | 3.5 of 5 | 1.7 |
| Ice storm | Relatively Moderate | 55th | 3.2 of 5 | 0.52 |
| Winter weather | Relatively Moderate | 54th | 3.2 of 5 | 11.2 |
| Heat wave | Relatively Moderate | 52nd | 3.1 of 5 | 5.7 |
| Earthquake | Relatively Low | 49th | 3.0 of 5 | <0.01 |
| Wildfire | Very Low | 40th | 2.6 of 5 | <0.01 |
| Hurricane | Very Low | 34th | 2.4 of 5 | 0.01 |
| Tornado | Relatively Low | 34th | 2.4 of 5 | 0.23 |
| Hail | Very Low | 29th | 2.2 of 5 | 2.9 |
| Lightning | Relatively Moderate | 19th | 1.7 of 5 | 46.9 |
Perils not assessed in Scioto 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 |
|---|---|
| Coastal flooding | FEMA rating is "Not Applicable" for this county |
Model hail, wind and flood exposure for Scioto 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.