# Wading River

NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/wading-river

Wading River is an operating three-generator petroleum-liquids combustion-turbine power plant on North Country Road in Shoreham, Suffolk County, New York. It entered service in August 1989 and has approximately 238.5 MW of nameplate capacity. The facility consists of three GE Frame 7EA simple-cycle gas turbines, each rated 79.5 MW, operating on distillate fuel oil. National Grid Generation LLC owns and operates the station, and the Long Island Power Authority purchases its capacity under a power supply agreement expiring in April 2028. NYISO is the balancing authority and market operator.

## Key facts

- Technology: Petroleum Liquids
- Power capacity: 238.5 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Technical.interconnection voltage kv: 138 kV — climate.ny.gov · confidence: review_required
- Agreements.power supply agreement.contracted capacity mw: 232 MW — documents.dps.ny.gov · confidence: review_required
- Agreements.power supply agreement.effective to: 2028-04-30 — documents.dps.ny.gov · confidence: review_required

## Timeline

- 2007-08-24 — National Grid acquisition of KeySpan
  National Grid plc acquired KeySpan Corporation in a corporate merger completed on August 24, 2007. The Wading River station continued operations as part of the Long Island generation portfolio now owned by National Grid through National Grid Generation LLC.
  Source: nationalgrid.com (https://www.nationalgrid.com/sites/default/files/documents/ngy09-nationalgridgenerationmarch312009pdfadobeacrobat.pdf)
- 2020 — LIPA and National Grid review Wading River emissions compliance and economics
  LIPA and National Grid reviewed Wading River/Shoreham and other peaking units in response to tighter nitrogen-oxide requirements and changing economics. The record describes possible future closures and evaluation, not a completed retirement of Wading River.
  Source: newsday.com (https://www.newsday.com/long-island/politics/lipa-national-grid-power-plants-y42197)
- 2026-01-22 — National Grid battery-storage proposal at Wading River withdrawn
  National Grid Ventures had previously listed a battery-storage proposal at Wading River, but withdrew the proposal. The proposal was described as exploratory and not under active development; it was not a repowering of the existing generating station.
  Source: newsday.com (https://www.newsday.com/long-island/environment/national-grid-ventures-battery-storage-plants-mb3fxula)

## Sources

- [climate.ny.gov](https://climate.ny.gov/-/media/Project/Climate/Files/JTWG-Power-Plant-Inventory.pdf) — climate.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BFDFD0F03-1E60-4C1A-95BD-AB56F780032E%7D&DocTitle=Testimony%20-%20Power%20Supply%20-%20Exhibit%20-%20PSP-2) — documents.dps.ny.gov · tier authoritative
- [pragmaticenvironmentalistofnewyork.blog](https://pragmaticenvironmentalistofnewyork.blog/wp-content/uploads/2025/10/long-island-power-genration-ar-323-1.pdf) — pragmaticenvironmentalistofnewyork.blog · tier public_source
- [gevernova.com](https://www.gevernova.com/gas-power/products/gas-turbines/7e) — gevernova.com · tier public_source
- [nationalgrid.com](https://www.nationalgrid.com/sites/default/files/documents/ngy09-nationalgridgenerationmarch312009pdfadobeacrobat.pdf) — nationalgrid.com · tier public_source
- [newsday.com](https://www.newsday.com/long-island/environment/national-grid-ventures-battery-storage-plants-mb3fxula) — newsday.com · tier public_source
- [newsday.com](https://www.newsday.com/long-island/politics/lipa-national-grid-power-plants-y42197) — newsday.com · tier public_source

## Data quality

- The exact-plant identity is supported by EIA plant ID 7146, the Shoreham address, three units, NYISO identifiers, and the National Grid Generation LLC utility record. The 1989 date is an initial-operation/start-year date from official records; a separate construction-start date was not identified in candidate research. The LILCO-to-KeySpan and KeySpan-to-National Grid ownership chain is supported at the corporate and Long Island generation-fleet level. Sources do not provide deed or unit-level sale instruments for each transfer. The 2020 retirement-review material describes emissions and economic evaluation, not a completed retirement. Current plant and NYISO records identify all three units as operating. The 2026 battery-storage proposal was separate from the existing petroleum generating units and should not be treated as a completed expansion or repowering of Wading River. No plant-specific project-financing amount was found in candidate research. The KeySpan acquisition price and the LIPA power-supply contract are not presented as Wading River construction financing or plant-specific sale consideration. Equipment detail is grounded in the National Grid survey document and GE Vernova official product pages, which confirm three GE Frame 7EA units at Wading River.
- Open question: [object Object]
- Open question: [object Object]

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