NINE MILE POINT NUCLEAR STATION

Operating

Nuclear power plant

Capacity
1,901 MW
Primary fuel
Nuclear
County
Oswego County
Operator
NINE MILE POINT NUCLEAR STA LLC
Status
Operating
Commissioned
1969
EIA plant ID
2589
Generators
2
Technology
Nuclear
Net generation (2024)
15,485 GWh
Capacity factor (2024, EIA nameplate)
93%
Data vintage
EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates
43.5210, -76.4103

See it on the map

NINE MILE POINT NUCLEAR STATION, a 1,901 MW Nuclear power plant in Oswego County, New York. Operated by NINE MILE POINT NUCLEAR STA LLC, commissioned 1969.

How NINE MILE POINT NUCLEAR STATION compares

With 1,901 MW of capacity, NINE MILE POINT NUCLEAR STATION ranks 3rd among the 320 operating power plants Bywatts maps in New York and is the largest of the 3 operating Nuclear plants in the state. It accounts for about 56% of New York's operating Nuclear capacity and 5.0% of all operating capacity in the state. Nationally it is the 25th-largest of the 55 operating Nuclear plants in the database. Commissioned in 1969, it is older than 61% of the 312 operating New York plants with a recorded commissioning year. It shares Oswego County with 15 other operating plants, including OSWEGO HARBOR POWER and SITHE INDEPENDENCE STATION.

EIA-860 lists 2 generators at the site with 1,901 MW of nameplate capacity, all nuclear technology. Net generation was 15,485 GWh in 2024 (a 93% capacity factor), up 2% from 2022. Its generators came online between 1969 and 1987.

Grid neighborhood

The nearest named substation is NINE MILE (345 kV), about 0.1 miles away; the closest transmission line found within 10 miles is a 115 kV line owned by NIAGARA MOHAWK POWER CORP., under 0.1 miles away. Another 15 operating power plants totaling 3,929 MW sit within 25 miles; the largest is OSWEGO HARBOR POWER (1,804 MW, Oil). Within 50 miles is one mapped data center, Westelcom Networks Watertown in Watertown, about 40.0 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

NINE MILE POINT NUCLEAR STATION is a 1,901 MW nuclear power plant in Oswego County, NY, operated by NINE MILE POINT NUCLEAR STA LLC, commissioned in 1969. Oswego County carries low modeled catastrophe exposure in the FEMA National Risk Index, scoring 1.1 of 5 at the 2nd national percentile. Ice storm is the leading peril, rated Relatively High by FEMA at the 74th percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a nuclear plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

1.1 of 5Modeled catastrophe exposure
LowExposure band
Ice stormLeading peril
Relatively LowFEMA county risk rating

Oswego County hazard ratings

PerilFEMA ratingNational percentilePeril scoreEvents per year
Ice stormRelatively High74th4.0 of 51.4
Riverine floodingRelatively Moderate52nd3.1 of 50.86
HurricaneRelatively Low49th3.0 of 50.01
Winter weatherRelatively High47th2.9 of 546.7
EarthquakeRelatively Low42nd2.7 of 5<0.01
Strong windRelatively Moderate34th2.4 of 51.2
WildfireVery Low22nd1.9 of 5<0.01
Coastal floodingVery Low15th1.6 of 50.01
TornadoRelatively Low15th1.6 of 50.16
HailVery Low10th1.4 of 51.5
Heat waveRelatively Low5th1.2 of 52.9
LightningRelatively Moderate3rd1.1 of 528.6

Model hail, wind and flood exposure for Oswego 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.