# Shoreham

NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/shoreham

Operating petroleum-liquids combustion-turbine plant at 1 LILCO Road, Wading River, New York, in NYISO zone K. The plant comprises GT1 (52.9 MW, July 1971 vintage) and GT2 (18.6 MW, April 1966 vintage), both using distillate fuel oil. GT1 is associated with NYISO LMP node 23715 and GT2 with node 23716. National Grid Generation LLC owns the plant; LIPA is the transmission/distribution owner; NYISO is the balancing authority.

## Key facts

- Technology: Petroleum Liquids
- Power capacity: 71.5 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Asset.site acres: 28 acres — climate.ny.gov · confidence: review_required

## Timeline

- 2006-02-27 — National Grid announced acquisition of KeySpan
  National Grid announced agreed acquisition of KeySpan for approximately $7.3 billion of equity consideration plus assumption of approximately $4.5 billion of debt. This is a portfolio transaction; the evidence does not allocate value to Shoreham specifically.
  Source: sec.gov (https://www.sec.gov/Archives/edgar/data/1004315/000007129706000008/feb27-6k.htm)
- 2007-08-24 — National Grid-KeySpan merger completed
  National Grid completed merger with KeySpan. National Grid Generation LLC and its subsidiaries became wholly owned by KeySpan Corporation, which became a wholly owned subsidiary of National Grid USA.
  Source: nationalgrid.com (https://www.nationalgrid.com/sites/default/files/documents/ngy09-nationalgridgenerationmarch312009pdfadobeacrobat.pdf)

## Sources

- [climate.ny.gov](http://climate.ny.gov/-/media/Project/Climate/Files/JTWG-Power-Plant-Inventory.pdf) — climate.ny.gov · tier authoritative
- [nationalgrid.com](https://www.nationalgrid.com/sites/default/files/documents/ngy09-nationalgridgenerationmarch312009pdfadobeacrobat.pdf) — nationalgrid.com · tier public_source
- [sec.gov](https://www.sec.gov/Archives/edgar/data/1004315/000007129706000008/feb27-6k.htm) — sec.gov · tier authoritative

## Data quality

- This record is for the fossil-fueled Shoreham plant identified by EIA plant ID 2518, not the separately named Shoreham Nuclear Power Plant. The 71.5 MW total is the sum of the two reported nameplate capacities, 52.9 MW (GT1) and 18.6 MW (GT2). The 2025 NYISO Gold Book lists May 1, 2023 as a proposed deactivation date for Shoreham 1 (GT1), and later NYISO documents indicate GT1 retirement status, while GT2 remains listed as an operating load-modifier resource as of September 2025. No confirmed whole-plant retirement has been established. No OEM or model-number details for the combustion turbines were found in the supplied sources, despite national grid filings classifying them as 'industrial' (GT1) and 'aircraft-derivative' (GT2) turbines. National Grid Generation's power-supply agreement with LIPA provides contractual revenue recovery mechanisms (monthly capacity fees plus O&M), not project-finance documentation.
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