EHC WEST HOPKINTON
OperatingHydro power plant
- Capacity
- 1 MW
- Primary fuel
- Hydro
- County
- Merrimack County
- Operator
- CONSOLIDATED HYDRO NH INC
- Status
- Operating
- Commissioned
- 1985
- EIA plant ID
- 54384
- Coordinates
- 43.1883, -71.7478
EHC WEST HOPKINTON, a 1 MW Hydro power plant in Merrimack County, New Hampshire. Operated by CONSOLIDATED HYDRO NH INC, commissioned 1985.
Weather peril exposure
EHC WEST HOPKINTON is a 1 MW hydro power plant in Merrimack County, NH, operated by CONSOLIDATED HYDRO NH INC, commissioned in 1985. Merrimack County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.6 of 5 at the 14th national percentile. Lightning 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.
Merrimack County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Lightning | Relatively High | 98th | 4.9 of 5 | 20.6 |
| Ice storm | Relatively High | 82nd | 4.3 of 5 | 1.8 |
| Hurricane | Relatively Moderate | 80th | 4.2 of 5 | 0.09 |
| Riverine flooding | Relatively Moderate | 76th | 4.0 of 5 | 2.6 |
| Earthquake | Relatively Low | 63rd | 3.5 of 5 | <0.01 |
| Winter weather | Relatively Moderate | 59th | 3.4 of 5 | 19.1 |
| Tornado | Relatively Low | 23rd | 1.9 of 5 | 0.13 |
| Wildfire | Very Low | 16th | 1.6 of 5 | <0.01 |
| Strong wind | Relatively Moderate | 12th | 1.5 of 5 | 0.91 |
| Hail | Relatively Low | 7th | 1.3 of 5 | 2.1 |
| Heat wave | Relatively Low | 6th | 1.2 of 5 | 3.4 |
Perils not assessed in Merrimack 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 Merrimack 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.