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  5. Port Jefferson, NY
  6. Port Jefferson

Port Jefferson

Beach Street, Port Jefferson, NY 11776

Plant Summary Information

Port Jefferson is ranked #50 out of 944 power plants in New York in terms of total annual net electricity generation.

Port Jefferson is comprised of 5 generators and generated 166.8 GWh during the 3-month period between May 2025 to August 2025.

Plant NamePort Jefferson
Utility NameNational Grid Generation LLC
LocationSuffolk County, NY
Initial Operation DateNovember 1958
Last Update Aug 2025
Annual Generation 236.0 GWh
Annual Consumption 3.4 M MMBtu
Ranked #2,254 out of 12,529 Power Plants Nationwide
Ranked #723 out of 2,243 Natural Gas Power Plants Nationwide
Ranked #50 out of 944 New York Power Plants
Ranked #30 out of 115 New York Natural Gas Power Plants
Fuel Types Natural Gas : 89.3% Residual Fuel Oil : 9.9% Distillate Fuel Oil : 0.7%

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Monthly Net Generation for Port Jefferson

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Port Jefferson Details

Summary Information
Plant NamePort Jefferson (2517)
Plant AddressBeach Street, Port Jefferson, NY 11776
UtilityNational Grid Generation LLC (56505)
Latitude, Longitude40.9497, -73.07851
Generation Dates on FileJan 2001 to Aug 2025
Initial Operation DateNovember 1958
Annual Generation 236.0 GWh
Fuel Types Natural Gas : 89.3% Residual Fuel Oil : 9.9% Distillate Fuel Oil : 0.7%
 
Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration StatusNo
FERC Small Power Producer StatusNo
FERC Exempt Wholesale Generator StatusYes
FERC Exempt Wholesale Generator Docket Number02-22-000
Regulatory Information
Regulatory StatusRegulated
NERC RegionNPCC
Balancing AuthorityNew York Independent System Operator (NYIS)
NAICS CodeUtilities (22)
Sector Electric Utility (1)
Water SourceLong Island Sound
Ash Impoundment Yes   Lined   Operating
Transmission / Distribution OwnerLong Island Power Authority (11171) NY
Grid Voltage 138.00 kV
Energy StorageNo
 
Natural Gas Information
Local Distribution Company (LDC)Other - See pipeline notes.
Pipeline Name IROQUOIS GAS TRANSMISSION SYS LP
Pipeline NotesKEDLI
Natural Gas StorageNo

* Data obtained from the 2024 EIA 860 Report

Generator 3 Details Operating November 1958

TechnologyNatural Gas Steam Turbine
Prime MoverSteam Turbine
OwnershipSingle Owner
RTO ISO LMP Node Designation23555
RTO ISO Location Designation For Reporting Wholesale Sales Data23555
Nameplate Capacity188 MW
Nameplate Power Factor0.9
Summer Capacity192 MW
Winter Capacity189.2 MW
Minimum Load15 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateNovember 1958
Combined Heat & Power No
Sector NameElectric Utility (1)
Energy SourceNatural Gas / Residual Fuel Oil
Startup SourceNatural Gas
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / RFO
Switch When OperatingYes
Net Summer Capacity With Natural Gas192 MW
Net Winter Capacity With Natural Gas189.2 MW
Net Summer Capacity With Oil192 MW
Net Winter Capacity With Oil189.2 MW
Time To Switch From Gas To Oil6H
Time To Switch From Oil To Gas6H
Factors That Limit SwitchingNo

Generator 4 Details Operating November 1960

TechnologyNatural Gas Steam Turbine
Prime MoverSteam Turbine
OwnershipSingle Owner
RTO ISO LMP Node Designation23616
RTO ISO Location Designation For Reporting Wholesale Sales Data23616
Nameplate Capacity188 MW
Nameplate Power Factor0.9
Summer Capacity193 MW
Winter Capacity194.7 MW
Minimum Load15 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateNovember 1960
Combined Heat & Power No
Sector NameElectric Utility (1)
Energy SourceNatural Gas / Residual Fuel Oil
Startup SourceNatural Gas
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / RFO
Switch When OperatingYes
Net Summer Capacity With Natural Gas193 MW
Net Winter Capacity With Natural Gas194.7 MW
Net Summer Capacity With Oil193 MW
Net Winter Capacity With Oil194.7 MW
Time To Switch From Gas To Oil6H
Time To Switch From Oil To Gas6H
Factors That Limit SwitchingNo

Generator GT1 Details Operating December 1966

TechnologyPetroleum Liquids
Prime MoverCombustion Turbine
OwnershipSingle Owner
RTO ISO LMP Node Designation23713
RTO ISO Location Designation For Reporting Wholesale Sales Data23713
Nameplate Capacity16 MW
Nameplate Power Factor0.85
Summer Capacity12.9 MW
Winter Capacity16.6 MW
Minimum Load10.6 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateDecember 1966
Combined Heat & Power No
Sector NameElectric Utility (1)
Energy SourceDistillate Fuel Oil
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load1H
Multiple FuelsNo
Cofire FuelsNo

Generator GT2 Details Operating July 2002

TechnologyNatural Gas Fired Combustion Turbine
Prime MoverCombustion Turbine
OwnershipSingle Owner
RTO ISO LMP Node Designation24210
RTO ISO Location Designation For Reporting Wholesale Sales Data24210
Nameplate Capacity53 MW
Nameplate Power Factor0.9
Summer Capacity42.6 MW
Winter Capacity46.7 MW
Minimum Load37 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateJuly 2002
Combined Heat & Power No
Sector NameElectric Utility (1)
Energy SourceNatural Gas / Distillate Fuel Oil
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load1H
Multiple FuelsYes
Cofire FuelsNo
Switch Between Oil And Natural GasYes
Multifuel Details
Switch When OperatingNo
Net Summer Capacity With Natural Gas42.6 MW
Net Winter Capacity With Natural Gas46.7 MW
Net Summer Capacity With Oil42.6 MW
Net Winter Capacity With Oil46.7 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Air Permit LimitsYes

Generator GT3 Details Operating July 2002

TechnologyNatural Gas Fired Combustion Turbine
Prime MoverCombustion Turbine
OwnershipSingle Owner
RTO ISO LMP Node Designation24211
RTO ISO Location Designation For Reporting Wholesale Sales Data24211
Nameplate Capacity53 MW
Nameplate Power Factor0.9
Summer Capacity40.1 MW
Winter Capacity47.1 MW
Minimum Load37 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateJuly 2002
Combined Heat & Power No
Sector NameElectric Utility (1)
Energy SourceNatural Gas / Distillate Fuel Oil
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load1H
Multiple FuelsYes
Cofire FuelsNo
Switch Between Oil And Natural GasYes
Multifuel Details
Switch When OperatingNo
Net Summer Capacity With Natural Gas40.1 MW
Net Winter Capacity With Natural Gas47.1 MW
Net Summer Capacity With Oil40.1 MW
Net Winter Capacity With Oil47.1 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Air Permit LimitsYes

Port Jefferson Plant Owners

Owner NameAddressGeneratorOwnership
We couldn't locate any owners for this plant

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#717Ingredion IncorporatedBedford Park, IL219.6 GWh
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#720DahlbergNicholson, GA229.4 GWh
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#722TolkMuleshoe, TX2.3 TWh
#724Roquette AmericaKeokuk, IA209.5 GWh
#725Atlantic Alumina, Gramercy OperationsGramercy, LA208.1 GWh
#726Limon Generating StationLimon, CO216.3 GWh
#727Elwood Energy LLCElwood, IL207.4 GWh
#728El Dorado RefineryEl Dorado, KS205.5 GWh
#729University of Illinois Abbott Power PltChampaign, IL211.1 GWh
#730Fredonia (WA)Mt Vernon, WA207.3 GWh
#731University of MichiganAnn Arbor, MI205.3 GWh
#732Mass Inst Tech Cntrl Utilities/Cogen PltCambridge, MA204.8 GWh
#733University of California San Diego HybriLa Jolla, CA203.8 GWh

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