Nine Mile Point Nuclear Station
Constellation EnergyOswego County
Two-unit nuclear generating station located at 348 Lake Road in Oswego, New York, on the shores of Lake Ontario. Unit 1 (613 MW, GE BWR-2) entered commercial operation on December 1, 1969. Unit 2 (1,277 MW, GE BWR-5) entered commercial operation on March 11, 1988. Constellation Energy owns Unit 1 (100%) and 82% of Unit 2; Long Island Power Authority owns the remaining 18% of Unit 2. Constellation operates the plant. The facility interconnects to the New York State Transmission System at the Scriba Substation at 345 kV. Unit 1 is currently licensed through August 22, 2029 and has a pending subsequent license renewal application; Unit 2 is licensed through 2046.
Mapped infrastructure geometry associated with this asset.
EIA plant 2589 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 1 | Nuclear | Operating | 641.8 | Unknown |
| 2 | Nuclear | Operating | 1,259.3 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 641.8 MW 619.7 MW summer | Nuclear ST | Dec 1969 | Operating |
| 2 | 1,259.3 MW 1,283.4 MW summer | Nuclear ST | Jul 1987 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Drag organizations to explore the network. Select a node to pin its details and available page link.
Project milestones and public references behind the asset profile.
Construction began for Nine Mile Point Unit 1
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Peach Bottom | 2,876.4 MW | PA | |
| Braidwood Generation Station | 2,449.8 MW | IL | |
| Byron Generating Station | 2,449.8 MW | IL | |
| LaSalle Generating Station | 2,340 MW | IL | |
| Limerick | 2,277 MW | PA | |
| Quad Cities Generating Station | 2,018.6 MW | IL | |
| Dresden Generating Station | 2,018.6 MW | IL | |
| Nine Mile Point Nuclear StationCurrent | 1,901.1 MW | NY |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator 1 with this operating date.
Unit 1 entered commercial operation
Construction began for Nine Mile Point Unit 2
EIA-860 lists generator 2 with this operating date.
Unit 2 entered commercial operation
Constellation Nuclear finalized the purchase of the two-unit Nine Mile Point plant for $815 million including fuel
The NRC approved a 15% Unit 2 uprate, approximately 521 MW thermal and approximately 158 MW electric
Operating responsibility for Unit 2 was assigned to Exelon Generation, while PSEG Long Island managed LIPA's interest
Constellation Energy Corporation separated from Exelon and became the stand-alone owner of Nine Mile Point Unit 1 and Unit 2
Constellation Energy Generation submitted an application seeking an additional 20 years of Unit 1 operation
The NRC published notice that the Unit 1 subsequent-license-renewal application was acceptable for docketing; docketing was not approval of the renewed license
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Nine Mile Point Nuclear Station reports 1,901.1 MW nuclear of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Nine Mile Point Nuclear Station is a nuclear facility in Oswego County, NY, participating in the NYISO market.
Nine Mile Point Nuclear Station is in Oswego County, NY, inside the NYISO balancing area.
Nine Mile Point Nuclear Station is operated by Constellation Nuclear according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Nine Mile Point Nuclear Station reported 15,558.8 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Nine Mile Point Nuclear Station ranks #26 of 54 operating plants of the same technology nationally. It ranks #1 of 3 in NY.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.