E F Barrett
National Grid Generation LLC - Nassau County - NYISO
E F Barrett is an operating, dual-fuel electric generating plant located in Island Park, Hempstead, Nassau County, New York. The exact EIA plant (ID 2511) comprises 13 generators with approximately 669.2 MW of nameplate capacity: two 188 MW natural-gas steam turbines placed in service in 1956 and 1963, and eleven combustion turbines including seven 18 MW simple-cycle units installed in 1970 and four 41.8 MW aero-derivative units installed in 1971. The plant is equipped to operate on natural gas (95.9% of fuel mix) and residual or distillate fuel oil (3.6%) as backup.
Overview
Key fields
- Nameplate capacity
- 669.2 MW
Canonical EIA plant baseline.
- Registry anchor
- Plant 2511
plant-2511
Structured profile
- Technology
- Natural Gas Steam Turbine, Natural Gas Fired Combustion Turbine
- Operator
- National Grid Generation LLC
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 10 | 41.8 MW 40.6 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1971 | Operating |
| 11 | 41.8 MW 40.1 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1971 | Operating |
| 12 | 41.8 MW 40.9 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1971 | Operating |
| 3 | 18 MW 17.7 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1970 | Operating |
| 4 | 18 MW 16.8 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1970 | Operating |
| 5 | 18 MW 17.6 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1970 | Operating |
| 6 | 18 MW 16.4 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1970 | Operating |
| 7 | 18 MW 0 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1970 | Operating |
| 8 | 18 MW 15.1 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1970 | Operating |
| 9 | 41.8 MW 41.2 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1971 | Operating |
| GT1 | 18 MW 17.4 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1970 | Operating |
| GT2 | 18 MW 17.6 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 1970 | Operating |
| ST1 | 188 MW 194.2 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Nov 1956 | Operating |
| ST2 | 188 MW 178 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Oct 1963 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 376 MW
- National rank
- #70
- NY rank
- #8
Monthly generation
Download CSVMonthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Nearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Transactions and agreements
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Investor / joint venture partner | Co-owner of proposed repowering project entity | |
| Parent company | Corporate parent | |
| Former owner / parent company | KeySpan Corporation | Prior corporate owner |
| Former owner | Long Island Lighting Company (LILCO) | Original owner and builder |
| Grid selection | plant:plant-2511 | Canonical asset page /nyiso/assets/plant/e-f-barrett. |
Reporting portfolio
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Northport | 1,564 MW | NY | |
| E F BarrettCurrent | 669.2 MW | NY | |
| Holtsville | 567 MW | NY | |
| Port Jefferson | 498 MW | NY | |
| Wading River | 238.5 MW | NY | |
| Glenwood | 110 MW | NY | |
| Glenwood Landing | 106 MW | NY | |
| Shoreham | 71.5 MW | NY |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioTimeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generator enters operationEIA-860
EIA-860 lists generator ST1 with this operating date.
- Generator enters operationEIA-860
EIA-860 lists generator ST2 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 3, generator GT1, generator GT2 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 4, generator 5, generator 6, generator 7, generator 8 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 10, generator 11, generator 12, generator 9 with this operating date.
- LIPA-National Grid power-supply frameworklipower.org
Amended and Restated Power Supply Agreement between LIPA and National Grid became effective, establishing the framework for LIPA's capacity purchases and contractual ramp-down, repowering, and site-acquisition rights.
- New repowering concept under preliminary evaluationliherald.com
National Grid was reported to be in the early stages of evaluating whether to repower the Island Park Barrett facility, including analyzing costs, potential designs, and whether existing infrastructure would be retired or temporarily retained during any transition.
Sources
Common questions about E F Barrett
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
How big is E F Barrett?
E F Barrett has a reported capacity of 669.2 MW. Source: EIA Form 860M.
What kind of plant is E F Barrett?
E F Barrett is a Natural Gas Steam Turbine, Natural Gas Fired Combustion Turbine facility in Nassau County, NY, participating in the NYISO market.
Where is E F Barrett located?
E F Barrett is in Nassau County, NY, inside the NYISO balancing area.
Who operates E F Barrett?
E F Barrett is operated by National Grid Generation LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
How much electricity does E F Barrett generate?
E F Barrett reported 1,150.7 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.
How does E F Barrett compare to other plants?
By capacity, E F Barrett ranks #70 of 257 operating plants of the same technology nationally. It ranks #8 of 14 in NY.
Co-located assets
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
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