Watson Cogeneration

22850 South Wilminton, Carson, CA 90749

Plant Summary Information

Watson Cogeneration is ranked #13 out of 1,581 power plants in California in terms of total annual net electricity generation.

Watson Cogeneration is comprised of 6 generators and generated 576.3 GWh during the 3-month period between December 2024 to March 2025.

Plant NameWatson Cogeneration
Utility NameARCO Products Co-Watson
LocationLos Angeles County, CA
Initial Operation DateDecember 1987
Last Update Mar 2025
Annual Generation 2.4 TWh
Annual Consumption 34.6 M MMBtu
Ranked #458 out of 12,016 Power Plants Nationwide
Ranked #317 out of 2,253 Natural Gas Power Plants Nationwide
Ranked #13 out of 1,581 California Power Plants
Ranked #18 out of 346 California Natural Gas Power Plants
Fuel Types Natural Gas : 85.1% Other Gas : 14.7%

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Monthly Net Generation for Watson Cogeneration

Watson Cogeneration Details

Summary Information
Plant NameWatson Cogeneration (50216)
Plant Address22850 South Wilminton, Carson, CA 90749
UtilityARCO Products Co-Watson (867)
Latitude, Longitude33.81665, -118.24484
Generation Dates on FileJan 2001 to Mar 2025
Initial Operation DateDecember 1987
Annual Generation 2.4 TWh
Fuel Types Natural Gas : 85.1% Other Gas : 14.7%
 
Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration StatusYes
FERC Cogeneration Docket Number85-526-001
FERC Small Power Producer StatusNo
FERC Exempt Wholesale Generator StatusNo
Regulatory Information
Regulatory StatusNon-Regulated
NERC RegionWECC
Balancing AuthorityCalifornia Independent System Operator (CISO)
NAICS CodePetroleum Refineries (32411)
Sector Industrial CHP (7)
Water SourceDominquez Water
Ash Impoundment No
Transmission / Distribution OwnerSouthern California Edison Co (17609) CA
Grid Voltage 220.00 kV
Energy StorageNo
 
Natural Gas Information
Local Distribution Company (LDC)SOUTHERN CALIFORNIA GAS COMPANY
Natural Gas StorageNo

Generator GN94 Details Operating December 1987

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Combustion Turbine Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Can Bypass Heat Recovery Steam GeneratorNo
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity82 MW
Nameplate Power Factor0.9
Summer Capacity82 MW
Winter Capacity82 MW
Minimum Load68 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateDecember 1987
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas / Waste/Other Oil
Startup SourceWaste/Other Oil / Natural Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Other Planned ModificationsNo
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / OG / WO
Switch When OperatingYes
Net Summer Capacity With Natural Gas82 MW
Net Winter Capacity With Natural Gas82 MW
Net Summer Capacity With Oil82 MW
Net Winter Capacity With Oil82 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Storage LimitsYes
Air Permit LimitsYes

Generator GN96 Details Operating December 1987

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Steam Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Duct BurnersYes
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity38.5 MW
Nameplate Power Factor0.9
Summer Capacity35 MW
Winter Capacity35 MW
Minimum Load10 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateDecember 1987
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load1H
Other Planned ModificationsNo
Multiple FuelsYes

Generator GN93 Details Operating January 1988

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Combustion Turbine Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Can Bypass Heat Recovery Steam GeneratorNo
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity82 MW
Nameplate Power Factor0.9
Summer Capacity82 MW
Winter Capacity82 MW
Minimum Load68 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateJanuary 1988
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas / Waste/Other Oil
Startup SourceWaste/Other Oil / Natural Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Other Planned ModificationsNo
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / OG / WO
Switch When OperatingYes
Net Summer Capacity With Natural Gas82 MW
Net Winter Capacity With Natural Gas82 MW
Net Summer Capacity With Oil82 MW
Net Winter Capacity With Oil82 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Storage LimitsYes
Air Permit LimitsYes

Generator GN92 Details Operating February 1988

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Combustion Turbine Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Can Bypass Heat Recovery Steam GeneratorNo
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity82 MW
Nameplate Power Factor0.9
Summer Capacity82 MW
Winter Capacity82 MW
Minimum Load68 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateFebruary 1988
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas / Waste/Other Oil
Startup SourceWaste/Other Oil / Natural Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Other Planned ModificationsNo
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / OG / WO
Switch When OperatingYes
Net Summer Capacity With Natural Gas82 MW
Net Winter Capacity With Natural Gas82 MW
Net Summer Capacity With Oil82 MW
Net Winter Capacity With Oil82 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Storage LimitsYes
Air Permit LimitsYes

Generator GN95 Details Operating February 1988

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Steam Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Duct BurnersYes
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity38.5 MW
Nameplate Power Factor0.9
Summer Capacity35 MW
Winter Capacity35 MW
Minimum Load10 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateFebruary 1988
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load1H
Other Planned ModificationsNo
Multiple FuelsYes

Generator GN91 Details Operating March 1988

TechnologyNatural Gas Fired Combined Cycle
Prime MoverCombined Cycle Combustion Turbine Part
Unit CodeCC1
OwnershipWholly Owned by Other Entity
Can Bypass Heat Recovery Steam GeneratorNo
RTO ISO LMP Node DesignationPOD_ARCOGN_2_UNITS
RTO ISO Location Designation For Reporting Wholesale Sales DataPOD_ARCOGN_2_UNITS
Nameplate Capacity82 MW
Nameplate Power Factor0.9
Summer Capacity82 MW
Winter Capacity82 MW
Minimum Load68 MW
Uprate/Derate Completed No
StatusOperating
First Operation DateMarch 1988
Combined Heat & Power Yes
Sector NameIndustrial CHP (7)
Topping Or BottomingT
Energy SourceNatural Gas / Other Gas / Waste/Other Oil
Startup SourceWaste/Other Oil / Natural Gas
Solid Fuel Gasification No
Carbon Capture TechnologyNo
Time From Cold Shutdown To Full Load12H
Other Planned ModificationsNo
Multiple FuelsYes
Cofire FuelsYes
Switch Between Oil And Natural GasYes
Multifuel Details
Cofire Energy SourceNG / OG / WO
Switch When OperatingYes
Net Summer Capacity With Natural Gas82 MW
Net Winter Capacity With Natural Gas82 MW
Net Summer Capacity With Oil82 MW
Net Winter Capacity With Oil82 MW
Time To Switch From Gas To Oil1H
Time To Switch From Oil To Gas1H
Factors That Limit SwitchingYes
Storage LimitsYes
Air Permit LimitsYes

Watson Cogeneration Plant Owners

Owner NameAddressGeneratorOwnership
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN91100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN92100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN93100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN94100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN95100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN96100.00%
Tesoro SoCal Cogen LLC19100 Ridgewood Parkway, San Antonio, TX 78259Generator GN97100.00%

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#308State Line Combined CycleJoplin, MO2.1 TWh
#309Hopewell CogenerationHopewell, VA2.1 TWh
#310Desert BasinCasa Grande, AZ2.0 TWh
#311Texas City Power PlantTexas City, TX2.0 TWh
#312HaynesLong Beach, CA2.0 TWh
#313Louisiana 1Baton Rouge, LA2.7 TWh
#314Sand HillAustin, TX2.0 TWh
#315Lewis CreekWillis, TX2.0 TWh
#316Bergen Generating StationRidgefield, NJ2.1 TWh
#318Coyote SpringsBoardman, OR2.0 TWh
#319Mint Farm Generating StationLongview, WA2.0 TWh
#320Effingham Energy FacilityRincon, GA2.0 TWh
#321St Francis Energy FacilityCampbell, MO2.0 TWh
#322ChesterfieldChester, VA2.0 TWh
#323H Wilson Sundt Generating StationTucson, AZ1.9 TWh
#324Bayou Cogen PlantPasadena, TX2.1 TWh
#325RS CogenLake Charles, LA1.9 TWh
#326Dow St Charles OperationsTaft, LA1.9 TWh
#327Magic Valley Generating StationEdinburg, TX1.9 TWh

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