NOTCH CLIFF
Retired 2020Natural Gas power plant
- Capacity
- 144 MW
- Primary fuel
- Natural Gas
- County
- Baltimore County
- Operator
- CONSTELLATION POWER SOURCE GEN
- EIA plant ID
- 1555
- Coordinates
- 39.4217, -76.5086
NOTCH CLIFF, a retired 144 MW Natural Gas power plant in Baltimore County, Maryland. It was retired in 2020, according to EIA-860.
How NOTCH CLIFF compares
It was retired in 2020 according to EIA-860, so it is not counted in Maryland's operating fleet. Its operator, CONSTELLATION POWER SOURCE GEN, runs 2 operating plants in Maryland totaling 487 MW. It shares Baltimore County with 2 other operating plants, EASTERN LANDFILL GAS LLC and SPARROWS POINT.
Grid neighborhood
The nearest named substation is CONASTONE (500 kV), about 18.4 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by BALTIMORE GAS & ELECTRIC CO, under 0.1 miles away. Another 16 operating power plants totaling 4,155 MW sit within 25 miles; the largest is BRANDON SHORES (1,370 MW, Coal). Within 50 miles are 2 mapped data centers; the nearest is Lumen Baltimore in Baltimore, about 10.8 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860 retirement records and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
NOTCH CLIFF is a retired 144 MW natural gas power plant in Baltimore County, MD, formerly operated by CONSTELLATION POWER SOURCE GEN. Baltimore County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.8 of 5 at the 20th national percentile. Hurricane is the leading peril, rated Relatively Moderate by FEMA at the 75th 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.
Baltimore County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Hurricane | Relatively Moderate | 75th | 4.0 of 5 | 0.10 |
| Coastal flooding | Relatively Moderate | 69th | 3.7 of 5 | 3.7 |
| Earthquake | Relatively Moderate | 60th | 3.4 of 5 | <0.01 |
| Winter weather | Very High | 34th | 2.4 of 5 | 12.5 |
| Hail | Relatively Moderate | 29th | 2.2 of 5 | 3.5 |
| Strong wind | Relatively High | 23rd | 1.9 of 5 | 8.0 |
| Tornado | Relatively Moderate | 22nd | 1.9 of 5 | 0.50 |
| Lightning | Very High | 21st | 1.8 of 5 | 38.1 |
| Ice storm | Relatively Moderate | 9th | 1.3 of 5 | 1.0 |
| Heat wave | Relatively High | 7th | 1.3 of 5 | 5.4 |
| Wildfire | Very Low | 7th | 1.3 of 5 | <0.01 |
| Riverine flooding | Relatively High | 4th | 1.2 of 5 | 5.6 |
Model hail, wind and flood exposure for Baltimore 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.