How many power plants does Southwestern Public Service operate?

EIA-860M lists 12 operating plants against “Southwestern Public Service Co” for 2026-07, totalling 6 GW of nameplate capacity in 2 states.

Is Southwestern Public Service the owner of these plants?

EIA-860M names one reporting entity per generator. That entity operates the plant on the survey; ownership can sit with a parent, a partnership or a tax-equity structure that the form does not record.

Why are affiliates listed separately?

Because EIA files them separately. Rolling subsidiaries into a parent would need an ownership map EIA-860M does not publish, so this page does not invent one.

Southwestern Public Service power plants

Every generating plant EIA-860M files against Southwestern Public Service for 2026-07: 12 plants, 6 GW of nameplate capacity, across 2 states and 5 energy sources.

EIA files this entity as “Southwestern Public Service Co”.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 12
Nameplate capacity: 6 GW
States: 2; NM, TX
Energy sources: 5

Southwestern Public Service plants by energy source

Coal1 plants · 1,136 MW
Natural gas6 plants · 3,262 MW
Petroleum1 plants · 27 MW
Solar2 plants · 258 MW
Wind2 plants · 1,000 MW

Full list of Southwestern Public Service power plants

Power plants operated by Southwestern Public Service Co

TolkConventional Steam Coal	Southwestern Public Service Co	Lamb	1,135.8	2	1982	Operating
HarringtonNatural Gas Steam Turbine	Southwestern Public Service Co	Potter	1,080	3	1976	Operating
Jones2 technologies	Southwestern Public Service Co	Lubbock	860.4	4	1971	Operating
Sagamore WindOnshore Wind Turbine	Southwestern Public Service Co	Roosevelt	522	1	2020	Operating
Hale Community Wind FarmOnshore Wind Turbine	Southwestern Public Service Co	Hale	478	1	2019	Operating
NicholsNatural Gas Steam Turbine	Southwestern Public Service Co	Potter	474.7	3	1960	Operating
Cunningham2 technologies	Southwestern Public Service Co	Lea	444.2	3	1965	Operating
Maddox2 technologies	Southwestern Public Service Co	Lea	212	3	1963	Operating
Plant XNatural Gas Steam Turbine	Southwestern Public Service Co	Lamb	190.4	1	1964	Operating
Plant X SolarSolar Photovoltaic	Southwestern Public Service Co	Lamb	150	1	2026	Operating
Cunningham Solar I & BESS2 technologies	Southwestern Public Service Co	Lea	108	2	2026	Operating
Quay CountyPetroleum Liquids	Southwestern Public Service Co	Quay	27	1	2013	Operating

Southwestern Public Service: FAQ

How many power plants does Southwestern Public Service operate?: EIA-860M lists 12 operating plants against “Southwestern Public Service Co” for 2026-07, totalling 6 GW of nameplate capacity in 2 states.
Is Southwestern Public Service the owner of these plants?: EIA-860M names one reporting entity per generator. That entity operates the plant on the survey; ownership can sit with a parent, a partnership or a tax-equity structure that the form does not record.
Why are affiliates listed separately?: Because EIA files them separately. Rolling subsidiaries into a parent would need an ownership map EIA-860M does not publish, so this page does not invent one.