# Sterling Power Plant NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/sterling-power-plant Sterling Power Plant (EIA 50744) is a 65.3 MW independent power producer located at 110 East Seneca Street in Sherrill, Oneida County, New York. The facility comprises a natural-gas-fired combined-cycle cogeneration block with a 47.7 MW GE Frame 6 combustion turbine, a 16.5 MW steam turbine, and a 1.1 MW distillate-fuel auxiliary generator. The combustion-turbine and petroleum-liquid units began operating in June 1991, with the steam unit following in July 1991. The plant was historically described by its operator as originally built in 1992 and acquired by Alliance Energy in 2005. All three generating units were listed as operating in the latest EIA-derived record. The facility operates as a cogeneration facility providing electricity to the grid and potentially steam to a host facility, though it is classified as an independent power producer without combined heat and power. Sterling interconnects to Niagara Mohawk Power Corp.'s 115 kV transmission system at the Oneida Substation through a dedicated 2.5-mile radial tie line. In October 2021, Sterling announced an intention to retire its 65 MW unit effective on or before May 2, 2022, citing sustained uneconomic conditions and regulatory uncertainty, subject to NYISO reliability review. In January 2026, PowerTransitions LegacyOps II entered into an agreement to acquire Sterling Power Partners LP and four other Alliance-affiliated generation entities representing 323 MW of combined capacity. ## Key facts - Technology: Natural Gas Fired Combined Cycle, Petroleum Liquids - Power capacity: 65.3 MW ## Grid and market context - ISO/RTO: NYISO - Balancing authority: NYISO ## Source-backed facts - Technical.site acres: 28 acres — climate.ny.gov · confidence: review_required - Operations.market resource ids.0: NYISO PTID 23777 (Zone E, settlement point SITHE___STERLING) — nyiso.com · confidence: review_required - Operations.status date: Listed as existing generating resource operating as of March 15, 2025 — nyiso.com · confidence: review_required - Identifiers.eia plant id: 50744 — datacommons.org · confidence: review_required - Identifiers.epa ghgrp facility id: 1007919 — datacommons.org · confidence: review_required ## Timeline - 1992-01-01 — Construction / facility vintage reported by historical operator Alliance Energy facility page reports the plant was originally built in 1992. This is retained as a separate historical record; EIA-derived generator records show 1991 first operation. Source: allianceenergy.net (http://allianceenergy.net/sterling-power-plant.html) - 2005-01-01 — Alliance Energy acquisition Alliance Energy New York, LLC acquired Sterling Power Plant. The predecessor owner was not identified in available materials. Source: allianceenergy.net (http://allianceenergy.net/sterling-power-plant.html) - 2012-06-08 — NYISO interconnection agreement effective SA-1144 large-generator interconnection agreement between Niagara Mohawk and Sterling Power Partners became effective. Source: nyisoviewer.etariff.biz (https://nyisoviewer.etariff.biz/viewerdoclibrary/mastertariffs/58TariffSections/3187.pdf) - 2012-09-17 — NYPSC financing approval and ownership context New York PSC approved Alliance financing of up to $14.0 million in credit facilities supported by Sterling and related assets. The order identified Sterling Power Partners as owner of an approximately 64 MW Sherrill generation facility. Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B5AC5FCC5-FEF7-48D0-BC83-2F5F743F54CB%7D) ## Sources - [allianceenergy.net](http://allianceenergy.net/sterling-power-plant.html) — allianceenergy.net · tier public_source - [climate.ny.gov](https://climate.ny.gov/-/media/Project/Climate/Files/JTWG-Power-Plant-Inventory.pdf) — climate.ny.gov · tier authoritative - [datacommons.org](https://datacommons.org/browser/eia/pp/50744) — datacommons.org · tier public_source - [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B5AC5FCC5-FEF7-48D0-BC83-2F5F743F54CB%7D) — documents.dps.ny.gov · tier authoritative - [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B90B9A09C-0000-C720-B30E-27AF683D69D1%7D) — documents.dps.ny.gov · tier authoritative - [nyisoviewer.etariff.biz](https://nyisoviewer.etariff.biz/viewerdoclibrary/mastertariffs/58TariffSections/3187.pdf) — nyisoviewer.etariff.biz · tier public_source - [gevernova.com](https://www.gevernova.com/gas-power/products/gas-turbines/6b) — gevernova.com · tier public_source - [gevernova.com](https://www.gevernova.com/steam-power/products/steam-turbines) — gevernova.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 EIA-derived plant record and New York regulatory filings identify the exact Sherrill facility (110 East Seneca Street, EIA 50744, Oneida County) consistently across all sources. The selection of 65.3 MW is supported by the sum of three explicitly identified EIA generator ratings (47.7 + 16.5 + 1.1 MW). The Alliance facility page reports the plant as originally built in 1992, while the EIA-derived generator records show first operation in June 1991 for the combustion-turbine and petroleum-liquid units and July 1991 for the steam part. This discrepancy is retained without forced resolution; both dates are documented facts from authoritative sources. Alliance Energy New York, LLC is confirmed as the owner/operator of the facility from 2005 through the proposed 2026 transfer. Sterling withdrew this notice in October 2022. The facility is listed in NYISO's operating facilities as of March 15, 2025, and continues to hold operating environmental permits. The New York PSC approved the transfer on July 22, 2026, but required PTLO II to file notice within five days of closing. The EIA-derived record classifies Sterling as an Independent Power Producer in the Non-CHP sector, while the operator's facility page describes it as a one-on-one combined-cycle cogeneration facility. The environmental permit confirms the cogeneration function (providing electricity to grid and steam to host facility), but EIA classification does not require or recognize CHP under the cited regulatory sector codes. No separate expansion, complete repowering, fuel conversion, or completed retirement event was identified. The environmental permit dated July 2025 describes renewal of existing operating units (gas turbine/HRSG with steam injection, auxiliary boiler, and 1,100 kW distillate-oil generator) and continuation of existing operational activity. - Open question: [object Object] - Open question: [object Object] - Open question: [object Object] - Open question: [object Object] - Open question: [object Object] - Open question: [object Object] --- Canonical page: https://askthegrid.com/nyiso/assets/plant/sterling-power-plant Source: Ask the Grid — https://askthegrid.com/