Nine Mile Point Nuclear Station
Nine Mile Point Nuclear Station is a nuclear plant in Oswego County, New York, operated by Constellation Nuclear. It ranks third by nameplate capacity among New York’s 1,145 power plants. It is the biggest of New York’s 3 nuclear plants. Counting by its oldest working unit (1969), it is the second-oldest of the 56 nuclear plants still running in the United States. Its biggest unit, rated at 1,259 MW, is the largest single generator in New York.
Nameplate capacity, 2025
1,901 MW
1,903 MW net summer capacity
2 operable units
- Nuclear1,901 MW100%
Unit by unit, 1969 to 2025
operating in 2025bar height follows unit size
Unit 1 Nuclear, 642 MW, 1969
Unit 2 Nuclear, 1,259 MW, 1987
Among New York’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Robert Moses Niagara2,429 MW
- 2Ravenswood2,096 MW
- 3Nine Mile Point Nuclear Stationthis plant
- 4Oswego Harbor Power1,804 MW
- 5Northport1,564 MW
Other rankings
- All US power plants
- 77th of 14,286
- US nuclear plants
- 27th of 56
- Plants in the New York ISO balancing area
- 3rd of 1,093
- Plants run by Constellation Nuclear
- 8th of 13
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Nuclear | 642 MW | 620 MW | 1969 | Operating |
| 2 | Nuclear | 1,259 MW | 1,283 MW | 1987 | Operating |
Who owns it
Shares are weighted by the nameplate capacity of each unit an owner holds.
| Owner | Share of capacity |
|---|---|
| Constellation Nuclear | 54.3% |
| Long Island Power Authority | 11.9% |
| Constellation Nuclear (sole owner of the other units) | 33.8% |
Grid and site
- Balancing area
- New York ISO
- Reliability region
- Northeast Power Coordinating Council
- Highest grid connection voltage
- 345 kV
- Water source
- Lake Ontario
- Nearest town on record
- Lycoming
- Operator type
- Independent producer
- Coordinates
- 43.521°N, 76.410°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| James A Fitzpatrick | Nuclear | 883 MW | 0.1 mi east |
| Sithe Independence Station | Natural gas | 1,158 MW | 2.7 mi southwest |
| SSC Oswego II LLC | Solar | 4.8 MW | 4.7 mi southwest |
| Oswego | Solar | 5 MW | 4.8 mi southeast |
| Summit - Scriba CSG | Solar | 5 MW | 5.0 mi southwest |
| Indeck Oswego Energy Center | Natural gas | 57.4 MW | 5.4 mi southwest |
| High Dam | Hydroelectric | 11.9 MW | 6.9 mi southwest |
| Varick | Hydroelectric | 8 MW | 6.9 mi southwest |