COVANTA HEMPSTEAD
OperatingBiomass power plant
- Capacity
- 79 MW
- Primary fuel
- Biomass
- County
- Nassau County
- Operator
- COVANTA HEMPSTEAD COMPANY
- Status
- Operating
- Commissioned
- 1989
- EIA plant ID
- 10642
- Generators
- 1
- Technology
- Municipal Solid Waste
- Net generation (2024)
- 596 GWh
- Capacity factor (2024, EIA nameplate)
- 86%
- Data vintage
- EIA-860 2024 final; EIA-923 2022-2024 final
- Coordinates
- 40.7384, -73.5901
COVANTA HEMPSTEAD, a 79 MW Biomass power plant in Nassau County, New York. Operated by COVANTA HEMPSTEAD COMPANY, commissioned 1989.
How COVANTA HEMPSTEAD compares
With 79 MW of capacity, COVANTA HEMPSTEAD ranks 67th among the 320 operating power plants Bywatts maps in New York and is the largest of the 22 operating Biomass plants in the state. It accounts for about 19% of New York's operating Biomass capacity and 0.2% of all operating capacity in the state. Nationally it is the 33rd-largest of the 350 operating Biomass plants in the database. Commissioned in 1989, it is newer than 59% of the 312 operating New York plants with a recorded commissioning year. It shares Nassau County with 9 other operating plants, including E F BARRETT and BETHPAGE POWER PLANT.
EIA-860 lists 1 generator at the site with 79 MW of nameplate capacity, all municipal solid waste technology. Net generation was 596 GWh in 2024 (an 86% capacity factor), up 3% from 2022.
Grid neighborhood
The nearest named substation is NEWBRIDGE ROAD (345 kV), about 2.6 miles away; the closest transmission line found within 10 miles is a 345 kV line, about 1.2 miles away. Another 48 operating power plants totaling 13,342 MW sit within 25 miles; the largest is RAVENSWOOD (2,625 MW, Natural Gas). Within 50 miles are 30 mapped data centers; the nearest is 1101 Stewart Ave, Garden City in Garden City, about 0.3 miles away.
Computed by Bywatts from HIFLD power plant, substation and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology
Weather peril exposure
COVANTA HEMPSTEAD is a 79 MW biomass power plant in Nassau County, NY, operated by COVANTA HEMPSTEAD COMPANY, commissioned in 1989. Nassau County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.4 of 5 at the 10th national percentile. Coastal flooding is the leading peril, rated Very High by FEMA at the 77th percentile.
The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a biomass plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.
Nassau County hazard ratings
| Peril | FEMA rating | National percentile | Peril score | Events per year |
|---|---|---|---|---|
| Coastal flooding | Very High | 77th | 4.1 of 5 | 3.8 |
| Hurricane | Relatively High | 76th | 4.1 of 5 | 0.17 |
| Earthquake | Relatively Moderate | 75th | 4.0 of 5 | <0.01 |
| Ice storm | Very High | 63rd | 3.5 of 5 | 0.72 |
| Wildfire | Very Low | 30th | 2.2 of 5 | <0.01 |
| Winter weather | Very High | 25th | 2.0 of 5 | 9.8 |
| Riverine flooding | Relatively High | 18th | 1.7 of 5 | 3.3 |
| Tornado | Relatively Moderate | 13th | 1.5 of 5 | 0.13 |
| Lightning | Very High | 13th | 1.5 of 5 | 27.3 |
| Strong wind | Relatively High | 11th | 1.4 of 5 | 4.9 |
| Heat wave | Relatively Moderate | 8th | 1.3 of 5 | 5.8 |
| Hail | Very Low | 1st | 1.1 of 5 | 1.7 |
Model hail, wind and flood exposure for Nassau 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.