PERRYMAN
OperatingNatural Gas power plant
- Capacity
- 404 MW
- Primary fuel
- Natural Gas
- County
- Harford County
- Operator
- CONSTELLATION POWER SOURCE GEN
- Status
- Operating
- Commissioned
- 1972
- EIA plant ID
- 1556
- Coordinates
- 39.4428, -76.2218
PERRYMAN, a 404 MW Natural Gas power plant in Harford County, Maryland. Operated by CONSTELLATION POWER SOURCE GEN, commissioned 1972.
Weather peril exposure
PERRYMAN is a 404 MW natural gas power plant in Harford County, MD, operated by CONSTELLATION POWER SOURCE GEN, commissioned in 1972. Harford County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.2 of 5 at the 5th national percentile. Hurricane is the leading peril, rated Relatively Moderate by FEMA at the 73rd percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Harford County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively Moderate | 73rd | 3.9 of 5 | 0.08 |
| Earthquake | Relatively Low | 55th | 3.2 of 5 | <0.01 |
| Winter weather | Relatively High | 53rd | 3.1 of 5 | 12.7 |
| Coastal flooding | Relatively Low | 51st | 3.1 of 5 | 3.7 |
| Strong wind | Relatively Moderate | 39th | 2.5 of 5 | 7.4 |
| Lightning | Relatively Moderate | 34th | 2.4 of 5 | 36.3 |
| Tornado | Relatively Low | 19th | 1.8 of 5 | 0.35 |
| Riverine flooding | Relatively Moderate | 11th | 1.4 of 5 | 2.9 |
| Wildfire | Very Low | 10th | 1.4 of 5 | <0.01 |
| Ice storm | Relatively Low | 7th | 1.3 of 5 | 1.1 |
| Hail | Very Low | 4th | 1.2 of 5 | 3.0 |
| Heat wave | Relatively Moderate | 1st | 1.0 of 5 | 5.0 |
Model hail, wind and flood exposure for Harford 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.