# Greenidge Generation LLC

NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/greenidge-generation-llc

Greenidge Generation LLC is a primarily natural-gas-fired electric generating facility located in the Town of Torrey, Yates County, New York, on Seneca Lake. The facility is identified by NYISO as Greenidge 4 (resource 23583) with 112.5 MW gross nameplate capacity and 106.3 MW net capability. It is a single-turbine Rankine-cycle steam generating plant fueled by natural gas and biomass. Originally placed in service as a coal-fired plant in 1937 by NYSEG and subsequently operated by AES, the facility was acquired by Atlas Holdings affiliates in February 2014 and converted from coal to natural gas, commencing commercial operations in March 2017. The facility sells electricity, capacity, and ancillary services through NYISO while supporting behind-the-meter load for Greenidge's cryptocurrency-mining and datacenter operations. In June 2022, NYSDEC denied renewal of the facility's Title V air permit based on findings that continued operation would be inconsistent with New York's greenhouse-gas limits under the Climate Leadership and Community Protection Act; however, in November 2025, Greenidge and NYSDEC announced a landmark agreement providing a pathway for issuance of a new five-year Title V permit.

## Key facts

- Technology: Natural Gas Steam Turbine
- Power capacity: 112 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Technical.interconnection voltage kv: 115 kV — nyisoviewer.etariff.biz · confidence: review_required
- Operations.transmission owner: New York State Electric & Gas Corporation (NYSEG) — nyisoviewer.etariff.biz · confidence: review_required
- Operations.operating status: operating — ir.greenidge.com · confidence: review_required
- Operations.resource type: Behind-the-Meter: Net Generation Resource — nyiso.com · confidence: review_required

## Sources

- [ir.greenidge.com](https://ir.greenidge.com/node/9316/pdf) — ir.greenidge.com · tier public_source
- [ir.greenidge.com](https://ir.greenidge.com/static-files/be791e8d-f3dc-4d5b-a7a2-0134fd6154be) — ir.greenidge.com · tier public_source
- [ir.greenidge.com](https://ir.greenidge.com/static-files/f7c3b982-2c5b-495b-b1b1-dfa6fba90940) — ir.greenidge.com · tier public_source
- [nyisoviewer.etariff.biz](https://nyisoviewer.etariff.biz/ViewerDocLibrary/MasterTariffs/58TariffSections/20161115%20Greenidge%20LGIA%202305%20clean_18436.htm) — nyisoviewer.etariff.biz · tier public_source
- [nyiso.com](https://www.nyiso.com/documents/20142/2226333/2025-Gold-Book-Public.pdf) — nyiso.com · tier authoritative

## Data quality

- The historical record carefully distinguishes the target Torrey, New York facility from other Greenidge Generation assets, including the later South Carolina data-center property and other company infrastructure. Company filings report different wording for the 2017 restart milestone: one timeline says wholesale operations commenced in March 2017, while another says the transformed plant commenced operations in May 2017. The facility was originally coal-fired and operated by NYSEG beginning in 1937. The documented 2014–2017 project was a coal-to-natural-gas conversion and boiler retrofit, not a complete unit replacement or new build. The June 2022 NYSDEC Title V permit renewal denial and the November 2025 agreement on a pathway to a new five-year permit are both documented. No separately identified dedicated project-financing facility for the coal-to-gas conversion was disclosed; the described financing relates to corporate debt, letters of credit, and later refinancing. Greenidge owns and operates an approximately 4.6-mile natural-gas pipeline constructed for the coal-to-gas conversion project, as documented in company filings and interconnection documents. The facility is identified as Unit 4 in technical records. Unit 3 was retired in 2009 and was not expected to return to service; therefore, the active unit count is one. The facility sells electricity, capacity, and ancillary services through the NYISO wholesale market while simultaneously supporting behind-the-meter load for Greenidge's cryptocurrency-mining and datacenter operations. This dual role is documented by both NYISDEC (which cited the behind-the-meter primary use in its permit denial) and by Greenidge's own disclosures.

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