Department of Environmental Conservation

D E C banner

Astoria Gas Turbine Power Replacement Project

On October 27, 2021, the New York State Department of Environmental Conservation (DEC) announced the agency's denial of the required Title V air permit for NRG Astoria Replacement Project (PDF) proposed by Astoria Gas Turbine Power, LLC., a wholly owned subsidiary of NRG Energy.

DEC's review determined the proposed project does not demonstrate compliance with the requirements of the Climate Leadership and Community Protection Act. The proposed project would be inconsistent with or would interfere with the statewide greenhouse gas emissions limits established in the Climate Act. Astoria NRG failed to demonstrate the need or justification for the proposed project notwithstanding this inconsistency.


Astoria Gas Turbine Power LLC
31-01 20th Ave
Astoria, NY 11105


Astoria Gas Turbine Power Replacement Project
31-01 20th Ave
Astoria, NY 11105

DEC Application ID Nos.:

Article 19 Air Title V Facility (2-6301-00191/00003)
Article 19 Title IV (Phase II Acid Rain) (2-6301-00191/00024)
Article 17 Titles 7 & 8 Industrial SPDES - Surface Discharge - (2-6301-00191/00014)
Article 15 Title 15 Water Withdrawal (2-6301-00191/00026)

Project Description

The New York State Department of Environmental Conservation (DEC), as lead agency, has determined that the Supplemental Draft Environmental Impact Statement (SDEIS), and applications for draft Title IV and Title V air permits, draft Industrial SPDES permit modification and water withdrawal for the proposed Astoria Replacement Project ("Replacement Project") (Leaves DEC's site), are complete for the purposes of public review and comment.

The existing Facility currently consists of 31 older, peaking-only gas and oil-fired CTs including 24 Pratt & Whitney ("P&W") turbines and seven retired Westinghouse turbines, with a combined nameplate rating of 646 MWe (502 MWe not including the retired Westinghouse turbines). The proposed Replacement Project, as modified, will replace the nearly 50-year-old P&W and Westinghouse turbines at the Facility with a new state-of-the art simple cycle dual-fuel peaking CTG. The proposed Replacement Project will include a new CTG which will be a highly efficient, quick start, fast-ramping, General Electric ("GE") H-Class 7HA.03 or equivalent unit that has a nominal generator output of approximately 437 MWe. The new CTG will fire natural gas as the primary fuel with limited ultra-low sulfur distillate ("ULSD") liquid fuel for backup. The proposed Replacement Project will also include a ULSD-fired emergency generator, and two ULSD-fired emergency fire water pumps.

All of the existing units, with the exception of one P&W Twin Pac (consisting of two combustion turbines and a single generator), will be permanently shut down once the proposed Replacement Project has completed its shakedown period. The two remaining P&W turbines will remain operational to make the site black-start capable until replaced by an approximately 24 MWe battery energy storage system. The P&W Twin Pac uses natural gas as its primary fuel with ultra-low sulfur kerosene ("ULSK") as backup. Make up water will be sourced from existing connections to the New York City water supply. No water will be withdrawn from the East River. Construction will require dewatering of the project site. The dewatering will involve the withdrawal of approximately 0.7 MGD of groundwater. The groundwater will be treated and ultimately discharged via existing outfall 001.

  • PDF Help
  • For help with PDFs on this page, please call 518-402-9167.
  • Contact for this Page
    Division of Environmental Permits
    4th Floor
    625 Broadway
    Albany, NY 12233-1750
    Send us an email
  • This Page Covers
  • Page applies to Region 2