Maddox

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

Plant Summary Information

Maddox is ranked #19 out of 140 power plants in New Mexico in terms of total annual net electricity generation.

Maddox is comprised of 3 generators and generated 202.3 GWh during the 3-month period between June 2025 to September 2025.

Plant Name	Maddox
Utility Name	Southwestern Public Service Co
Location	Lea County, NM
Initial Operation Date	January 1963
Last Update	Sep 2025
Annual Generation	536.7 GWh
Annual Consumption	6.4 M MMBtu
Ranked #1,262 out of 12,539 Power Plants Nationwide
Ranked #545 out of 2,243 Natural Gas Power Plants Nationwide
Ranked #19 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 Sep 2025
Initial Operation Date	January 1963
Annual Generation	536.7 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
#535	Bethpage Power Plant	Hicksville, NY	573.5 GWh
#536	Berkshire Power	Agawam, MA	573.3 GWh
#537	Eklutna Generation Station	Chugiak, AK	573.0 GWh
#538	Shell Chemical	Geismar, LA	572.3 GWh
#539	NAFTA Region Olefins Complex Cogen Fac	Port Arthur, TX	562.0 GWh
#540	Brandywine Power Facility	Brandywine, MD	592.5 GWh
#541	Freeport LP Pretreatment Facility	Freeport, TX	555.9 GWh
#542	Gregory Power Plant	Gregory, TX	552.7 GWh
#543	Dave Gates Generating Station	Anaconda, MT	551.8 GWh
#544	Desert Star Energy Center	Boulder City, NV	546.1 GWh
#546	West Deptford Energy Station	West Deptford, NJ	534.9 GWh
#547	Sayreville Cogeneration Facility	Sayreville, NJ	534.8 GWh
#548	BASF Freeport Works	Feeeport, TX	532.7 GWh
#549	Remy Jade Power Station	Crosby, TX	532.6 GWh
#550	SPA Cogen 3	Sacramento, CA	531.2 GWh
#551	Dighton Power Plant	Dighton, MA	531.1 GWh
#552	Sewell Creek Energy	Cedartown, GA	522.9 GWh
#553	Shady Hills Generating Station	Shady Hills, FL	528.8 GWh
#554	Louisa Generation Facility	Gordonsville, VA	520.8 GWh
#555	Darby Power, LLC	Mt Sterling, OH	510.4 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	3.0 TWh	1.1 mi
Jumbo Hill Wind Project	Andrews, TX	595.9 GWh	30.6 mi
Lapetus	Andrews, TX	226.2 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	2.6 TWh	37.1 mi
Mustang Station Unit 4	Denver City, TX	1.7 TWh	37 mi
Oso Grande Wind Farm	Maljamar, NM	628.5 GWh	26 mi
Prospero Solar	Andrews, TX	758.9 GWh	39.9 mi
Prospero Solar II	Andrews, TX	671.4 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