WINSOR DAM POWER STATION
OperatingPower plant
- County
- Hampshire County
- Operator
- MASSACHUSETTS WATER RES AUTH
- Status
- Operating
- EIA plant ID
- 10826
- Coordinates
- 42.2797, -72.3436
WINSOR DAM POWER STATION, a power plant in Hampshire County, Massachusetts. Operated by MASSACHUSETTS WATER RES AUTH.
Weather peril exposure
WINSOR DAM POWER STATION is a power plant in Hampshire County, MA, operated by MASSACHUSETTS WATER RES AUTH. Hampshire County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.4 of 5 at the 11th national percentile. Hurricane is the leading peril, rated Relatively Moderate by FEMA at the 80th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to this plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Hampshire County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively Moderate | 80th | 4.2 of 5 | 0.10 |
| Lightning | Relatively Moderate | 79th | 4.2 of 5 | 25.3 |
| Ice storm | Relatively Moderate | 68th | 3.7 of 5 | 2.0 |
| Earthquake | Relatively Low | 49th | 3.0 of 5 | <0.01 |
| Riverine flooding | Relatively Moderate | 45th | 2.8 of 5 | 1.9 |
| Winter weather | Relatively Low | 38th | 2.5 of 5 | 18.4 |
| Wildfire | Very Low | 29th | 2.2 of 5 | <0.01 |
| Tornado | Relatively Low | 29th | 2.2 of 5 | 0.16 |
| Strong wind | Relatively Moderate | 16th | 1.6 of 5 | 1.7 |
| Hail | Relatively Low | 7th | 1.3 of 5 | 3.0 |
| Heat wave | Relatively Low | 7th | 1.3 of 5 | 4.0 |
Perils not assessed in Hampshire 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 Hampshire 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.