Maddox

9m W. of Hobbs on Hwy 62-180, Hobbs, NM 88240

Plant Summary Information

Maddox is ranked #21 out of 140 power plants in New Mexico in terms of total annual net electricity generation.

Maddox is comprised of 3 generators and generated 121.8 GWh during the 3-month period between August 2025 to November 2025.

Plant Name	Maddox
Utility Name	Southwestern Public Service Co
Location	Lea County, NM
Initial Operation Date	January 1963
Last Update	Nov 2025
Annual Generation	515.0 GWh
Annual Consumption	5.7 M MMBtu
Ranked #1,311 out of 12,574 Power Plants Nationwide
Ranked #550 out of 2,244 Natural Gas Power Plants Nationwide
Ranked #21 out of 140 New Mexico Power Plants
Ranked #5 out of 19 New Mexico Natural Gas Power Plants
Fuel Types	Natural Gas

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Summary Information
Plant Name	Maddox (2446)
Plant Address	9m W. of Hobbs on Hwy 62-180, Hobbs, NM 88240
Utility	Southwestern Public Service Co (17718)
Latitude, Longitude	32.71422, -103.30147
Generation Dates on File	Jan 2001 to Nov 2025
Initial Operation Date	January 1963
Annual Generation	515.0 GWh
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	MRO
Balancing Authority	Southwest Power Pool (SWPP)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Wells
Ash Impoundment	No
Transmission / Distribution Owner	Southwestern Public Service Co (17718) NM
Grid Voltage	115.00 kV
Energy Storage	No

Natural Gas Information
Pipeline Name	MARKWEST NEW MEXICO L P
Natural Gas Storage	No
Liquefied Natural Gas Storage	No

* Data obtained from the 2024 EIA 860 Report

Technology	Natural Gas Fired Combustion Turbine
Prime Mover	Combustion Turbine
Ownership	Single Owner
Nameplate Capacity	11.5 MW
Nameplate Power Factor	0.85
Summer Capacity	10 MW
Winter Capacity	10 MW
Minimum Load	3 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	January 1963
Planned Retirement	December 2026
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	12H
Multiple Fuels	No

Technology	Natural Gas Steam Turbine
Prime Mover	Steam Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	SPS.MADDOX1
RTO ISO Location Designation For Reporting Wholesale Sales Data	SPS.MADDOX1
Nameplate Capacity	113.6 MW
Nameplate Power Factor	0.85
Summer Capacity	117 MW
Winter Capacity	112 MW
Minimum Load	35 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	January 1967
Planned Retirement	December 2028
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

Technology	Natural Gas Fired Combustion Turbine
Prime Mover	Combustion Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	SPS.MADDOXCT2
RTO ISO Location Designation For Reporting Wholesale Sales Data	SPS.MADDOXCT2
Nameplate Capacity	86.9 MW
Nameplate Power Factor	0.9
Summer Capacity	61 MW
Winter Capacity	63 MW
Minimum Load	48 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	January 1976
Planned Retirement	December 2026
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	1H
Multiple Fuels	No

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

Power plants with a similar annual net generation from Natural Gas.

Rank	Plant Name	Plant Location	Annual Generation
#540	NAFTA Region Olefins Complex Cogen Fac	Port Arthur, TX	562.0 GWh
#541	Freeport LP Pretreatment Facility	Freeport, TX	555.9 GWh
#542	Frontier	Oklahoma City, OK	553.7 GWh
#543	Roseton Generating Facility	Newsburgh, NY	610.9 GWh
#544	Sayreville Cogeneration Facility	Sayreville, NJ	534.8 GWh
#545	BASF Freeport Works	Feeeport, TX	532.7 GWh
#546	Dighton Power Plant	Dighton, MA	531.1 GWh
#547	Sewell Creek Energy	Cedartown, GA	522.9 GWh
#548	Dave Gates Generating Station	Anaconda, MT	519.1 GWh
#549	Louisa Generation Facility	Gordonsville, VA	520.8 GWh
#551	Shute Creek Facility	Kemmerer, WY	869.6 GWh
#552	RockGen Energy Center	Cambridge, WI	511.5 GWh
#553	Darby Power, LLC	Mt Sterling, OH	510.4 GWh
#554	Roseville Energy Park	Roseville, CA	504.4 GWh
#555	Remy Jade Power Station	Crosby, TX	502.0 GWh
#556	West Gardner	Johnson, KS	502.0 GWh
#557	Comanche (OK)	Lawton, OK	500.6 GWh
#558	Alpine Power Plant	Elmira, MI	498.5 GWh
#559	Talbot County Energy	Box Springs, GA	494.2 GWh
#560	Cheyenne Prairie Generating Station	Cheyenne, WY	490.3 GWh

Below are closest 20 power plants surrounding Maddox.

Plant Name	Plant Location	Annual Generation	Distance
Anderson Wind I	Hagerman, NM	9.7 GWh	38.8 mi
Anderson Wind II	Hagerman, NM	26.4 GWh	38.7 mi
Cunningham	Hobbs, NM	1.8 TWh	3 mi
Frankel	Andrews, TX	165.0 MWh	38 mi
Hobbs Generating Station	Hobbs, NM	3.3 TWh	1.1 mi
Jumbo Hill Wind Project	Andrews, TX	593.4 GWh	30.6 mi
Lapetus	Andrews, TX	222.2 GWh	40.6 mi
LCEC Generation LLVC	Lovington, NM	100.7 GWh	18.3 mi
Middle Daisy	Lovington, NM	13.3 GWh	18.7 mi
Mustang Station	Denver City, TX	2.4 TWh	37.1 mi
Mustang Station Unit 4	Denver City, TX	1.7 TWh	37 mi
Oso Grande Wind Farm	Maljamar, NM	566.9 GWh	26 mi
Prospero Solar	Andrews, TX	761.0 GWh	39.9 mi
Prospero Solar II	Andrews, TX	667.5 GWh	40.3 mi
SPS1 Dollarhide	Jal, NM	23.0 GWh	41.7 mi
SPS2 Jal	Jal, NM	21.1 GWh	37.3 mi
SPS3 Lea	Eunice, NM	23.0 GWh	16.9 mi
SPS4 Monument	Monument, NM	22.9 GWh	2.2 mi
Wasson CO2 Removal Plant	Denver City, TX	145.6 GWh	37.6 mi
Wildcat Wind	Lovington, NM	56.4 GWh	16.5 mi