How many power plants does Southwestern Electric Power operate?

EIA-860M lists 12 operating plants against “Southwestern Electric Power Co” for 2026-07, totalling 7 GW of nameplate capacity in 4 states.

Is Southwestern Electric Power 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 Electric Power plants

Every generating plant EIA-860M files against Southwestern Electric Power for 2026-07: 12 plants, 7 GW of nameplate capacity, across 4 states and 3 energy sources.

EIA files this entity as “Southwestern Electric Power 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: 7 GW
States: 4; AR, LA, OK, TX
Energy sources: 3

Southwestern Electric Power plants by energy source

Coal3 plants · 2,283 MW
Natural gas6 plants · 2,559 MW
Wind3 plants · 1,798 MW

Full list of Southwestern Electric Power plants

Power plants operated by Southwestern Electric Power Co

WelshConventional Steam Coal	Southwestern Electric Power Co	Titus	1,116	2	1977	Operating
Traverse Wind Project, LLCOnshore Wind Turbine	Southwestern Electric Power Co	Custer	999	1	2022	Operating
WilkesNatural Gas Steam Turbine	Southwestern Electric Power Co	Marion	882	3	1964	Operating
J Lamar Stall UnitNatural Gas Fired Combined Cycle	Southwestern Electric Power Co	Caddo	624	3	2010	Operating
John W Turk Jr Power PlantConventional Steam Coal	Southwestern Electric Power Co	Hempstead	609	1	2012	Operating
Wagon Wheel WindOnshore Wind Turbine	Southwestern Electric Power Co	Logan	598.4	1	2025	Operating
Flint CreekConventional Steam Coal	Southwestern Electric Power Co	Benton	558	1	1978	Operating
Knox LeeNatural Gas Steam Turbine	Southwestern Electric Power Co	Gregg	351	1	1974	Operating
Harry D Mattison Gas PlantNatural Gas Fired Combustion Turbine	Southwestern Electric Power Co	Washington	349	4	2007	Standby/Backup
LiebermanNatural Gas Steam Turbine	Southwestern Electric Power Co	Caddo	228	2	1957	Operating
Diversion Wind Energy LLCOnshore Wind Turbine	Southwestern Electric Power Co	Baylor	200.6	2	2024	Operating
Arsenal HillNatural Gas Steam Turbine	Southwestern Electric Power Co	Caddo	125	1	1960	Operating

Southwestern Electric Power: FAQ

How many power plants does Southwestern Electric Power operate?: EIA-860M lists 12 operating plants against “Southwestern Electric Power Co” for 2026-07, totalling 7 GW of nameplate capacity in 4 states.
Is Southwestern Electric Power 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.