Nine Mile Point Nuclear Station
Nuclear power plant in Oswego County, New York. 1,901.1 MW of nameplate capacity across 2 generators, operated by Constellation Nuclear.
Also known as Nine Mile Point Nuclear Generating Station · EIA plant 2589
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,901.1 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- December 1969First generator online
- Operator
- Constellation NuclearEIA operator ID 55951
- Grid
- NYISOBalancing authority NYIS
- Price nodes
- 2 NYISO nodesResource nodes with prices
- Location
- Oswego County, NY43.5211, −76.4100
- EIA plant ID
- 2589EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Nine Mile Point Nuclear Station produces
Free · EIA-923Net generation, 2025
16.0 TWh
15,963,576 MWh, final
Capacity factor, 2025
95.9%
2024: 92.7%
January to July 2026
8.72 TWh
Provisional
Range, 2015 to 2025
15.2–16.2
TWh a year. Low 2022, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 12,286,269 | Not reported | 12 of 12 |
| 2001 | 11,970,517 | Not reported | 11 of 12 |
| 2002 | 13,242,891 | Not reported | 12 of 12 |
| 2003 | 13,866,542 | Not reported | 12 of 12 |
| 2004 | 13,601,536 | Not reported | 12 of 12 |
| 2005 | 14,507,748 | Not reported | 12 of 12 |
| 2006 | 14,384,334 | Not reported | 12 of 12 |
| 2007 | 13,964,024 | Not reported | 12 of 12 |
| 2008 | 14,387,723 | Not reported | 12 of 12 |
| 2009 | 14,914,496 | Not reported | 12 of 12 |
| 2010 | 14,239,053 | 85.5% | 12 of 12 |
| 2011 | 14,155,619 | 85.0% | 12 of 12 |
| 2012 | 13,165,263 | 78.8% | 12 of 12 |
| 2013 | 15,846,333 | 95.2% | 12 of 12 |
| 2014 | 15,239,180 | 91.5% | 12 of 12 |
| 2015 | 15,998,076 | 96.1% | 12 of 12 |
| 2016 | 15,500,372 | 92.8% | 12 of 12 |
| 2017 | 15,992,880 | 96.0% | 12 of 12 |
| 2018 | 15,382,830 | 92.4% | 12 of 12 |
| 2019 | 15,821,376 | 95.0% | 12 of 12 |
| 2020 | 15,640,608 | 93.7% | 12 of 12 |
| 2021 | 16,206,392 | 97.3% | 12 of 12 |
| 2022 | 15,160,831 | 91.0% | 12 of 12 |
| 2023 | 15,506,901 | 93.1% | 12 of 12 |
| 2024 | 15,484,543 | 92.7% | 12 of 12 |
| 2025 | 15,963,576 | 95.9% | 12 of 12 |
| 2026 (provisional, partial year) | 8,717,359 | 90.1% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · NYISOEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
153,455
million gallons
Consumption, 2024
4,961
million gallons
Source
Lake Ontario
Surface, Fresh. Once-through
Watershed stress
Severe · 0.839
USGS SUI, HUC12 Otter Branch-Frontal Lake America
24 of 24 cooling months report withdrawal. Great Lakes intake; a shoreline HUC12 does not describe the lake; not tested. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Nuclear | 641.8 | December 1969 |
| 2 | Nuclear | 1,259.3 | July 1987 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Constellation Nuclear as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Nine Mile Point Nuclear Station
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Questions about Nine Mile Point Nuclear Station
How much power does Nine Mile Point Nuclear Station produce?
Nine Mile Point Nuclear Station reported 15,963,576 MWh (16.0 TWh) of net generation in 2025, a 95.9% capacity factor on 1,901.1 MW of nameplate capacity. From January to July 2026 it reported 8.72 TWh, which is provisional.
Where is Nine Mile Point Nuclear Station?
Nine Mile Point Nuclear Station is in Oswego County, New York, at 43.5211, −76.4100. It is in the New York Independent System Operator balancing area (NYIS).
Who operates Nine Mile Point Nuclear Station?
EIA-860M for August 2026 lists Constellation Nuclear as the operator (EIA operator ID 55951). The operator is not always the owner.
When did Nine Mile Point Nuclear Station start operating?
Its first generator began operating in December 1969, according to EIA-860M.
Does InfraMap have power prices for Nine Mile Point Nuclear Station?
Yes. InfraMap has NYISO day-ahead and real-time prices at 2 price nodes linked to Nine Mile Point Nuclear Station, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- NYISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page