# Glenwood Landing NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/glenwood-landing Glenwood Landing (EIA plant 7869) is a 106 MW natural-gas and distillate-oil fired combustion-turbine generation facility located at 400 Shore Road, Glenwood Landing, Nassau County, New York. The two LM6000 natural-gas turbines are equipped with selective catalytic reduction and water/steam injection for NOx control. Annual generation in 2024 was 129.2 GWh with fuel mix of 84.2% natural gas and 15.8% distillate fuel oil. National Grid decommissioned the broader Glenwood Landing generating site between 2011 and June 2015 under an approved plan managed by TRC Companies; however, the two LM6000 units continued operating or remained available for dispatch, with resources running continuously for approximately 168 hours in March 2026. ## Key facts - Technology: Natural Gas Fired Combustion Turbine - Power capacity: 106 MW ## Grid and market context - ISO/RTO: NYISO - Balancing authority: NYISO ## Source-backed facts - Operations.substation: Glenwood Substation — psegliny.com · confidence: review_required - Operations.settlement point: Glenwood — ethree.com · confidence: review_required - Operations.market resource ids: 23712, 24219, 24220 — ethree.com · confidence: review_required - Operations.operating status: operating — newsday.com · confidence: review_required - Operations.status date: March 2026 — newsday.com · confidence: review_required - Equipment.lm6000 turbines.count: 2 units — extapps.dec.ny.gov · confidence: review_required - Equipment.lm6000 turbines.rating mmbtu per hour: 457 MMBTU/HR — extapps.dec.ny.gov · confidence: review_required - Equipment.lm6000 turbines.stack height feet: 125 feet — extapps.dec.ny.gov · confidence: review_required - Equipment.emissions control.nox control: Selective catalytic reduction (SCR) and water or steam injection — extapps.dec.ny.gov · confidence: review_required - Permit.title v permit id: 1-2824-02146/00003 — extapps.dec.ny.gov · confidence: review_required - Permit.facility name: Glenwood Landing Energy Center — extapps.dec.ny.gov · confidence: review_required - Permit.permitted owner: National Grid Glenwood Energy Center LLC — extapps.dec.ny.gov · confidence: review_required - Transactions.acquisition date: 1998-05-28 — documents.dps.ny.gov · confidence: review_required - Transactions.seller: Long Island Lighting Company — documents.dps.ny.gov · confidence: review_required ## Timeline - 1998-05-28 — Acquisition of LILCO Non-Nuclear Generation Assets National Grid Generation (formerly MarketSpan LLC and KeySpan Generation LLC) acquired LILCO's non-nuclear generation assets including Glenwood Landing as part of a restructuring transaction involving KeySpan Corporation and Long Island Power Authority Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B00E5D295-0000-C027-BB1B-ED1813C57F4C%7D) - 2007-08-24 — National Grid Merger with KeySpan Corporation National Grid plc completed its merger with KeySpan Corporation, bringing the Glenwood Landing generation business under National Grid ownership. Approximately $7.6 billion aggregate consideration paid; KeySpan shares converted into cash at $42.00 per share Source: nationalgrid.com (https://www.nationalgrid.com/sites/default/files/documents/ngy08-keyspancorpmarch2008.pdf) - 2011-07 — Decommissioning Project Contract Award TRC Companies awarded contract for owner's engineering services for the decommissioning, demolition, and restoration of the Glenwood Landing Generating Site; scope includes program management, structural surveys, asbestos and regulated material surveys, environmental assessment, power delivery engineering, permitting, closure of cooling water structures, and construction oversight Source: trccompanies.com (https://www.trccompanies.com/projects/national-grid-glenwood-landing-ny-re-power-project/) - 2015-06 — Decommissioning Project Completion TRC Companies completion of owner's engineering services and decommissioning project for the Glenwood Landing Generating Site; approximately 200 MW generating facility decommissioned in accordance with approved plans Source: trccompanies.com (https://www.trccompanies.com/projects/national-grid-glenwood-landing-ny-re-power-project/) - 2026-03-18 — Continuous Operation Report Newsday reports that Glenwood Landing peaker cluster ran continuously for approximately 168 hours, indicating active dispatch during winter peak demand period on Long Island Source: newsday.com (https://www.newsday.com/long-island/environment/lipa-national-grid-winter-power-plants-fuel-oil-fozvx3za) ## Sources - [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B00E5D295-0000-C027-BB1B-ED1813C57F4C%7D) — documents.dps.ny.gov · tier authoritative - [extapps.dec.ny.gov](https://extapps.dec.ny.gov/data/dar/afs/permits/prr_128240214600003_r3.pdf) — extapps.dec.ny.gov · tier authoritative - [mbrweb.ferc.gov](https://mbrweb.ferc.gov/SearchlkpEIA/Index?page=259) — mbrweb.ferc.gov · tier authoritative - [ethree.com](https://www.ethree.com/wp-content/uploads/2019/08/E3_The_Potential_for_Energy_Storage_to_Repower_or_Replace_Peaking_Units_in_New_York_State_July_2019.pdf) — ethree.com · tier public_source - [gevernova.com](https://www.gevernova.com/gas-power/products/gas-turbines/lm6000) — gevernova.com · tier public_source - [nationalgrid.com](https://www.nationalgrid.com/sites/default/files/documents/ngy08-keyspancorpmarch2008.pdf) — nationalgrid.com · tier public_source - [newsday.com](https://www.newsday.com/long-island/environment/lipa-national-grid-winter-power-plants-fuel-oil-fozvx3za) — newsday.com · tier public_source - [psegliny.com](https://www.psegliny.com/reliability/glenwoodlanding) — psegliny.com · tier public_source - [trccompanies.com](https://www.trccompanies.com/projects/national-grid-glenwood-landing-ny-re-power-project/) — trccompanies.com · tier public_source ## Data quality - The exact plant is EIA 7869 at 400 Shore Road; the nearby Glenwood plant record at 200 Shore Road is a separate EIA asset (EIA 2514) and is not merged here. The 1998 ownership evidence describes National Grid Generation as successor to LILCO for certain Long Island generating assets and states that it acquired LILCO's non-nuclear generation assets; the later 2007 KeySpan merger is corporate context, not a separately documented Glenwood sale. TRC describes decommissioning of a broader 200 MW Glenwood Landing generating site, with work awarded in July 2011 and completed in June 2015. That scope should not be treated as proof that every generator in the 106 MW EIA 7869 record ceased operating at that time. Both are retained as distinct records rather than reconciled as one date. No definitive construction contractor, OEM supply agreement, sale consideration, portfolio transaction value, plant-level project-finance debt, or repowering financing amount was identified. The TRC source documents a decommissioning cost estimate and salvage-value credit but gives no amount. The permit record identifies the facility's operating company as 'National Grid Glenwood Energy Center LLC' but separately identifies the plant operator as 'National Grid Generation LLC'; both entities are subsidiaries within the National Grid corporate structure. The NYSDEC permit record dated 07/02/2025 confirms the two LM6000 turbines and describes them as 'existing operating equipment' in the Title V renewal, supporting continued operation or availability through at least mid-2025. --- Canonical page: https://askthegrid.com/nyiso/assets/plant/glenwood-landing Source: Ask the Grid — https://askthegrid.com/