# Glenwood

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

Glenwood is a 110 MW petroleum-liquids combustion-turbine peaking plant located at 200 Shore Road, Glenwood Landing, Nassau County, New York. The exact EIA plant 2514 consists of two 55 MW simple-cycle gas turbines (GT2 and GT3), each a GE LM6000 aeroderivative model, first placed in service in June 1972. The units fire primarily on distillate fuel oil and are equipped with water injection and selective catalytic reduction for NOx control. Glenwood is connected to NYISO at LMP/PTID nodes 23688 and 23689, serves as a Long Island peaking and near-term reliability resource, and is subject to New York State DEC Peaker Rule compliance, including water-injection retrofits due by May 1, 2027. National Grid Glenwood Energy Center LLC, a wholly owned subsidiary of National Grid Generation LLC, owns and operates the plant. The facility sells capacity, energy conversion, and ancillary services to the Long Island Power Authority under a 25-year power purchase agreement.

## Key facts

- Technology: Petroleum Liquids
- Power capacity: 110 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Generation.annual gwh 2024: 2.7 GWh — nyiso.com · confidence: review_required

## Timeline

- 2027-06-01 — Glenwood Energy Center PPA expiration
  Expiration date of the 25-year power purchase agreement between National Grid Glenwood Energy Center LLC and the Long Island Power Authority for the sale of capacity, energy conversion services, and ancillary services.
  Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B0055849E-0000-C83B-8952-F7F4C5EDE81F%7D&DocTitle=PPA%20Status%20Report%20%20-%20Glenwood%20and%20Port%20Jefferson)

## Sources

- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B0055849E-0000-C83B-8952-F7F4C5EDE81F%7D&DocTitle=PPA%20Status%20Report%20%20-%20Glenwood%20and%20Port%20Jefferson) — documents.dps.ny.gov · tier authoritative
- [extapps.dec.ny.gov](https://extapps.dec.ny.gov/data/dar/afs/permits/prr_128240214600003.pdf) — extapps.dec.ny.gov · tier authoritative
- [nationalgrid.com](https://www.nationalgrid.com/sites/default/files/documents/ngy09-nationalgridgenerationmarch312009pdfadobeacrobat.pdf) — nationalgrid.com · tier public_source
- [nyiso.com](https://www.nyiso.com/documents/20142/2226333/2025-Gold-Book-Public.pdf) — nyiso.com · tier authoritative

## Data quality

- The exact EIA 2514 asset must be distinguished from the separately described Glenwood Energy Center LLC facility, which is a project-company entity associated with a 25-year LIPA PPA and design capacity of approximately 80 MW; the 110 MW figure (55 MW × 2 units) applies to the physical GT2 and GT3 generators. NYISO records classify Glenwood GT2 and GT3 as retired as of March 31, 2024, but concurrent NYISO April 2026 planning documents identify Glenwood as an operating near-term Long Island reliability solution with water-injection compliance due May 1, 2027. This apparent discrepancy may reflect a NYISO data classification issue or status recovery; the record is presented without forced resolution. No plant-specific project-financing amount or sale consideration was identified that can be safely attributed to EIA plant 2514's GT2 and GT3 units. A National Grid filing reports $53.3 million of Nassau County Industrial Development Revenue Bonds for Glenwood construction, but the same filing describes the associated facility as designed for 79.9 MW, so that debt cannot be assigned to the exact 110 MW EIA 2514 asset. The 2011-2015 TRC Glenwood Landing decommissioning project is site-level and older-steam-facility focused; it is not treated as definitive proof of GT2 or GT3 retirement. No reliable plant-specific EPC contractor, construction price, expansion record, or standalone repowering project was identified for GT2 or GT3. The Glenwood plant location hosts multiple generator units (GT1, GT2, GT3, GT4, GT5) with different fuel types (petroleum and natural gas) and deployment dates; care must be taken to distinguish the exact EIA 2514 petroleum-turbine pair from broader site records.
- Open question: [object Object]

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