# Port Jefferson

NYISO asset profile · https://askthegrid.com/assets/facilities/port-jefferson

National Grid Generation LLC - Suffolk County - NYISO

Port Jefferson Power Station is an operating fossil-fuel-fired peaker power plant located at 700 Beach Street in Port Jefferson, Suffolk County, New York. The facility consists of five generating units totaling approximately 498 MW of nameplate capacity: two 188 MW natural-gas/residual-fuel-oil steam turbines commissioned in November 1958 and November 1960 respectively; one 16 MW distillate-fuel-oil combustion turbine commissioned in December 1966; and two 53 MW natural-gas/distillate-fuel-oil combustion turbines commissioned in July 2002 as the Port Jefferson Energy Center. The plant is owned and operated by National Grid Generation LLC and supplies capacity, energy conversion, and ancillary services to the Long Island Power Authority (LIPA) under long-term contractual arrangements. Natural gas is the primary fuel with residual and distillate fuel oil serving as backup. The facility generates approximately 416.1 GWh annually and is part of a critical generation portfolio serving approximately two million people on Long Island.

## Metrics

- **Nameplate capacity:** 498 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 2517 — plant-2517

## Facts

- **Technology:** Natural Gas Fired Combustion Turbine, Petroleum Liquids, Natural Gas Steam Turbine
- **Operator:** National Grid Generation LLC

## Related parties

- **Offtaker / power marketer / transmission owner:** Long Island Power Authority (LIPA) — Power purchaser and transmission-distribution system owner ([source](https://www.lipower.org/))
- **Equipment supplier:** GE Vernova (General Electric) — OEM/technology provider for LM6000 combustion turbines ([source](https://www.gevernova.com/gas-power/products/gas-turbines/lm6000))
- **Former owner:** Long Island Lighting Company (LILCO) — Predecessor owner of generation assets
- **Former owner:** KeySpan Generation LLC — Intermediate predecessor owner

## Sources

- [health.ny.gov](http://health.ny.gov/environmental/investigations/cmp/environmentalfactsheet.htm) — health.ny.gov · authoritative — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/port-jefferson
Website: [National Grid Generation LLC](https://www.nationalgrid.com/national-grid-ventures/what-we-do/conventional-generation)

Source: Ask the Grid — https://askthegrid.com/