# Allegany Cogen

NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/allegany-cogen

A natural-gas-fired combined-cycle cogeneration facility in Hume, Allegany County, New York, owned by Allegany Generating Station LLC and operated under Alliance Energy New York, LLC. The facility uses a General Electric LM6000 gas turbine with a heat-recovery steam generator and duct burners, selective catalytic reduction for emissions control, and a General Electric steam turbine. Nominal gross rating approximately 62–65 MW. The facility was constructed by Ansaldo Industria of America and entered commercial operation in December 1994 as a Kamine/Besicorp project. RG&E acquired it through legal settlement in December 1998 and divested it to Alliance Energy in November 2013.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 67 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Location.state: New York — allianceenergy.net · confidence: review_required
- Site.acres: 5.9 acres — documents.dps.ny.gov · confidence: review_required
- Capacity.power mw: 62 MW — documents.dps.ny.gov · confidence: review_required
- Operation.commercial date: 1994-12-01 — documents.dps.ny.gov · confidence: review_required
- Market.iso rto: NYISO — nyiso.com · confidence: review_required
- Interconnection.service agreement: NYISO Service Agreement No. 2036 — nyisoviewer.etariff.biz · confidence: review_required

## Timeline

- 2013-10-18 — NYPSC approval of transfer from RG&E to Allegany Generating Station LLC
  The New York Public Service Commission approved transfer of RG&E's ownership interests in the Allegany Generating Station to Allegany Generating Station LLC, a subsidiary of Alliance Energy New York LLC. The estimated purchase price was $1.8 million and the estimated pre-tax sale loss was approximately $3.5 million.
  Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B6A6E6B49-EC86-48CA-8E58-01DE317F8B97%7D)
- 2013-11-01 — Sale closing and ownership transfer to Allegany Generating Station LLC
  RG&E completed the sale of the Allegany generating station to Allegany Generating Station LLC on November 1, 2013. This was the effective date of the Large Generator Interconnection Agreement (NYISO Service Agreement No. 2036) between RG&E and Allegany.
  Source: nyisoviewer.etariff.biz (https://nyisoviewer.etariff.biz/viewerdoclibrary/Filing/Filing795/Attachments/2013-11-26%20LGIA_RGE_Allegany_Filing_Letter.pdf)

## Sources

- [allianceenergy.net](http://allianceenergy.net/allegany-power-plant.html) — allianceenergy.net · tier public_source
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B6A6E6B49-EC86-48CA-8E58-01DE317F8B97%7D) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BD148BC34-73B6-4023-B71F-2CB9EF245DF8%7D&DocTitle=IUSA%20Fossil%20Auction%20Section%2070%20Petition) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BE243D0EA-BCCC-46DC-896F-8A524CC2C781%7D) — documents.dps.ny.gov · tier authoritative
- [extapps.dec.ny.gov](https://extapps.dec.ny.gov/data/dar/afs/permits/prr_902580001800023_r2.pdf) — extapps.dec.ny.gov · tier authoritative
- [nyisoviewer.etariff.biz](https://nyisoviewer.etariff.biz/viewerdoclibrary/Filing/Filing795/Attachments/2013-11-26%20LGIA_RGE_Allegany_Filing_Letter.pdf) — nyisoviewer.etariff.biz · tier public_source
- [nyiso.com](https://www.nyiso.com/documents/20142/1399006/part2_schedule1_generating.pdf/be42daed-ae04-8939-93d5-2165d9d3f6a4) — nyiso.com · tier authoritative
- [thebellcompany.com](https://www.thebellcompany.com/projects/allegany-power-plant) — thebellcompany.com · tier public_source

## Data quality

- Capacity values reported by different sources reflect different measurement bases: NYISO 61.0 MW, NYPSC fossil-auction petition 62 MW (nominal), owner page 62 MW (capacity), NYSDEC permit 65 MW (nominal gross power rating), RG&E 2000 filing 63 MW (nameplate capability), and a later 2026 NYPSC transfer filing 67 MW. The selected value of 62.0 MW reflects the most explicit current-capacity statements from the facility owner and key regulatory records (2013 NYPSC transfer order and official Alliance facility page). Commercial operation date reflects the original December 1994 entry into service. RG&E acquired the facility in December 1998 and reported June 1999 as the date it began generating electricity for RG&E's purposes. The dual dates reflect the facility's pre-acquisition history and RG&E's operational engagement. These are sale-accounting figures. This is portfolio-level financing, not facility-specific construction debt. The facility was in operation as of the November 2021 Title V permit renewal and is listed as active in NYISO's generator registry. No retirement, repowering, or fuel-conversion activity is documented. The Commonwealth grid source (https://www.opengrid.info/pricing-nodes/allegany-cogen-nyiso-gen) lists the NYISO node as nyiso-gen-7784, consistent with EIA plant 7784. The official Alliance Energy facility page lists operation year as 1994, consistent with the commercial operation date of December 1994.

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