# Narrows Gas Turbines Generating

NYISO power_plant · https://askthegrid.com/nyiso/assets/plant/narrows-gas-turbines-generating

Narrows Generating Station is a 322 MW floating power station located in Brooklyn along the east side of Upper New York Bay. The facility consists of 16 simple-cycle combustion-turbine units on two floating power barges moored to a pier in the Bay Ridge Channel. All units are dual-fuel capable, operating primarily on natural gas with distillate fuel oil (ULSD) as backup. The turbines, installed in May 1972, are GE Frame 5N units with approximately 22 MW nameplate capacity each. Sixteen starting engines fueled by ULSD were added in January 1993. The station provides critical peaking capacity, can be started in fifteen minutes, and offers black-start capability for system restoration. NYISO determined that Narrows Units 1 and 2 are needed for New York City Zone J reliability through May 1, 2029.

## Key facts

- Technology: Natural Gas Fired Combustion Turbine
- Power capacity: 308 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Technical.unit count: 16 turbines — documents.dps.ny.gov · confidence: review_required
- Technical.unit configuration: Eight turbines per barge on two floating barges — documents.dps.ny.gov · confidence: review_required
- Operations.grid role: Peaking resource with black-start capability — alphagen.com · confidence: review_required
- Technical.site acres: 12 acres — documents.dps.ny.gov · confidence: review_required

## Timeline

- 1993-01-01 — Starting Engine Installation
  Sixteen starting engines (ULSD-fired, 600 HP each) were installed on the two floating barges to provide black-start capability and auxiliary power.
  Source: extapps.dec.ny.gov (https://extapps.dec.ny.gov/data/dar/afs/permits/prr_261020008600011_r4.pdf)
- 2025-06-01 — Retirement Notices Submitted
  AlphaGen submitted Notices of Intent to Retire the Narrows and Gowanus facilities pursuant to the New York Peaker Rule and the applicable NYISO operating period.
  Source: prnewswire.com (https://www.prnewswire.com/news-releases/alphagen-withdraws-retirement-notices-for-gowanus--narrows-generating-stations-following-nyiso-reliability-determinations-302743905.html)
- 2026-03-19 — AlphaGen Repowering Proposal
  AlphaGen proposed replacing six peaking units at Gowanus and Narrows with three lower-emitting generation units in response to Con Edison's solicitation for solutions to New York City reliability needs.
  Source: rtoinsider.com (https://www.rtoinsider.com/128325-alphagen-proposes-repowering-to-meet-nyc-reliability-need/)
- 2026-04-16 — Retirement Notices Withdrawn; Continued Operation Required Until May 1, 2029
  AlphaGen withdrew the Notices of Intent to Retire for Narrows Units 1 and 2 after NYISO Short-Term Reliability Process determined that Narrows and Gowanus must continue operating to address New York City Zone J reliability needs through May 1, 2029.
  Source: prnewswire.com (https://www.prnewswire.com/news-releases/alphagen-withdraws-retirement-notices-for-gowanus--narrows-generating-stations-following-nyiso-reliability-determinations-302743905.html)

## Sources

- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B50EEA8CD-58A9-40FC-87B5-3DC6E1CE3D4E%7D) — documents.dps.ny.gov · tier authoritative
- [extapps.dec.ny.gov](https://extapps.dec.ny.gov/data/dar/afs/permits/prr_261020008600011_r4.pdf) — extapps.dec.ny.gov · tier authoritative
- [investor.conedison.com](https://investor.conedison.com/news-releases/news-release-details/con-edison-announces-winning-bidder-power-generating-facilities/) — investor.conedison.com · tier public_source
- [alphagen.com](https://www.alphagen.com/) — alphagen.com · tier public_source
- [gevernova.com](https://www.gevernova.com/gas-power/products/gas-turbines) — gevernova.com · tier public_source
- [prnewswire.com](https://www.prnewswire.com/news-releases/alphagen-withdraws-retirement-notices-for-gowanus--narrows-generating-stations-following-nyiso-reliability-determinations-302743905.html) — prnewswire.com · tier public_source
- [prnewswire.com](https://www.prnewswire.com/news-releases/arclight-capital-partners-announces-completion-of-eastern-generations-acquisition-of-a-power-asset-portfolio-from-tenaska-300196879.html) — prnewswire.com · tier public_source
- [rtoinsider.com](https://www.rtoinsider.com/128325-alphagen-proposes-repowering-to-meet-nyc-reliability-need/) — rtoinsider.com · tier public_source

## Data quality

- Capacity varies by source and rating basis: 271 MW (1999 Con Edison sale announcement), 308 MW (supplied plant anchor and sum of unit summer ratings), 320 MW (regulatory filings), and 322 MW (current AlphaGen and ArcLight descriptions, 2015 portfolio acquisition). The conflict does not block publication because the sources are consistent with different rating methodologies (nameplate, summer-peak, facility-level, winter-peak) and no source contradicts another within the same rating class. The supplied 308 MW figure is supported by unit-level summer-capacity data. The exact facility is identified by the Brooklyn address (4 Whale Square, Brooklyn, NY 11232), NYSDEC facility ID 6102, EIA plant ID 2499, FERC entity C000175, and the universally used name 'Narrows Generating Station' or 'Narrows Gas Turbines Generating'. Similarly named Gowanus and Astoria facilities are treated as separate assets. No Narrows-specific purchase price was disclosed. No transaction value or Narrows-specific purchase price was identified. Retirement scope is identified as unit-level (Narrows Units 1 and 2) in the June 2025 and April 2026 notices, not a whole-plant retirement. NYISO's April 2026 determination requires the Narrows units to continue operating through May 1, 2029. Starting engine details (January 1993 installation, 16 ULSD-fired units, 600 HP each) are drawn from the NYSDEC permit review and support black-start capability. The record supports the asset identity, ownership chain (Con Edison → Orion/Astoria GenCo → Tenaska → ArcLight/Eastern Generation), operational status (operating, peaking), grid role, interconnection details, and equipment configuration. Eastern Generation, LLC is now added as a portfolio entity with resolved source backing. All entity relationships have valid endpoints. No material conflicts remain unresolved.

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