O W Sommers

12940 US Hwy 181 South, San Antonio, TX 78263

Plant Summary Information

O W Sommers is ranked #47 out of 313 natural gas power plants in Texas in terms of total annual net electricity generation.

O W Sommers is comprised of 2 generators and generated 530.0 GWh during the 3-month period between September 2025 to December 2025.

Plant Name	O W Sommers
Utility Name	City of San Antonio - (TX)
Location	Bexar County, TX
Initial Operation Date	April 1972
Last Update	Dec 2025
Annual Generation	2.3 TWh
Annual Consumption	25.6 M MMBtu
Ranked #467 out of 13,081 Power Plants Nationwide
Ranked #286 out of 2,206 Natural Gas Power Plants Nationwide
Ranked #61 out of 852 Texas Power Plants
Ranked #47 out of 313 Texas Natural Gas Power Plants
Fuel Types	Natural Gas

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Summary Information
Plant Name	O W Sommers (3611)
Plant Address	12940 US Hwy 181 South, San Antonio, TX 78263
Utility	City of San Antonio - (TX) (16604)
Latitude, Longitude	29.30806, -98.3242
Generation Dates on File	Jan 2001 to Dec 2025
Initial Operation Date	April 1972
Annual Generation	2.3 TWh
Fuel Types	Natural Gas

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	TRE
Balancing Authority	Electric Reliability Council of Texas, Inc. (ERCO)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Calaveras Lake
Ash Impoundment	No
Transmission / Distribution Owner	City of San Antonio - (TX) (16604) TX
Grid Voltage	138.00 kV
Energy Storage	No

Natural Gas Information
Pipeline Name	ENTERPRISE TEXAS PIPELINE
Natural Gas Storage	No

* Data obtained from the 2025 EIA 860 Report

Technology	Natural Gas Steam Turbine
Prime Mover	Steam Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	CALAVER_OWS1
RTO ISO Location Designation For Reporting Wholesale Sales Data	CALAVER_OWS1
Nameplate Capacity	446 MW
Nameplate Power Factor	0.9
Summer Capacity	420 MW
Winter Capacity	420 MW
Minimum Load	70 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	April 1972
Planned Retirement	March 2027
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Startup Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	OVER
Multiple Fuels	No
Cofire Fuels	No
Switch Between Oil And Natural Gas	No

Technology	Natural Gas Steam Turbine
Prime Mover	Steam Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	CALAVER_OWS2
RTO ISO Location Designation For Reporting Wholesale Sales Data	CALAVER_OWS2
Nameplate Capacity	446 MW
Nameplate Power Factor	0.9
Summer Capacity	410 MW
Winter Capacity	410 MW
Minimum Load	70 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	January 1974
Planned Retirement	March 2029
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Startup Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	OVER
Multiple Fuels	No
Cofire Fuels	No
Switch Between Oil And Natural Gas	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

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#277	C D McIntosh Jr	Lakeland, FL	2.4 TWh
#278	Emery Station	Clear Lake, IA	2.4 TWh
#279	Gila River Power Block 4	Gila Bend, AZ	2.4 TWh
#280	Cedar Bayou 4	Eldon, TX	2.3 TWh
#281	Hay Road	Wilmington, DE	2.4 TWh
#282	Mint Farm Generating Station	Longview, WA	2.3 TWh
#283	Chehalis Generating Facility	Chehalis, WA	2.3 TWh
#284	Desert Basin	Casa Grande, AZ	2.3 TWh
#285	Caithness Long Island Energy Center	Yaphank, NY	2.3 TWh
#287	Sweeny Cogen Facility	Old Ocean, TX	3.2 TWh
#288	State Line Combined Cycle	Joplin, MO	2.3 TWh
#289	Grays Harbor Energy Facility	Elma, WA	2.3 TWh
#290	Dogwood Energy Facility	Pleasant Hill, MO	2.2 TWh
#291	Bastrop Energy Center	Cedar Creek, TX	2.2 TWh
#292	Front Range Power Plant	Fountain, CO	2.2 TWh
#293	Harrington	Amarillo, TX	2.2 TWh
#294	Mustang Station	Denver City, TX	2.2 TWh
#295	Anclote	Holiday, FL	2.2 TWh
#296	Sunrise Power LLC	Fellows, CA	2.1 TWh

Below are closest 20 power plants surrounding O W Sommers.

Plant Name	Plant Location	Annual Generation	Distance
Arthur Von Rosenberg	Elmendorf, TX	3.4 TWh	5 mi
Blue Wing Solar Energy Generation	San Antonio, TX	19.5 GWh	4.6 mi
CPS 1 Community Solar	Adkins, TX	1.7 GWh	5.9 mi
FELPS 1 - Calaveras	Floresville, TX	1.9 GWh	7.5 mi
FELPS 2 - Calaveras	Floresville, TX	1.9 GWh	7.4 mi
FELPS 3 - Floresville South	Floresville, TX	2.8 GWh	18 mi
FELPS 4 - Floresville South	Floresville, TX	2.8 GWh	18 mi
FELPS 5- Floresville South	Floresville, TX	1.8 GWh	18 mi
FELPS 6- Floresville West	Floresville, TX	2.2 GWh	14.4 mi
FELPS 7- Floresville West	Floresville, TX	2.2 GWh	14.4 mi
HEB_CPSSADC	San Antonio, TX	862.0 MWh	7.9 mi
IKEA Live Oak Rooftop PV System	Live Oak, TX	2.0 GWh	12.7 mi
J K Spruce	San Antonio, TX	6.2 TWh	0.3 mi
Leon Creek	San Antonio, TX	385.7 GWh	15.5 mi
OCI Alamo 2, LLC	Converse, TX	8.2 GWh	11.2 mi
OCI Alamo 3 LLC	San Antonio, TX	9.6 GWh	11.9 mi
OCI Alamo Solar I Hybrid	San Antonio, TX	77.8 GWh	7.7 mi
SunE CPS1 LLC	San Antonio, TX	4.5 GWh	7.2 mi
SunE CPS2 LLC	San Antonio, TX	7.0 GWh	7.2 mi
V H Braunig	Elmendorf, TX	281.9 GWh	5 mi