How many power plants does Tri-State G & T Assn operate?

EIA-860M lists 8 operating plants against “Tri-State G & T Assn, Inc” for 2026-07, totalling 3 GW of nameplate capacity in 2 states.

Is Tri-State G & T Assn 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.

Tri-State G & T Assn power plants

Every generating plant EIA-860M files against Tri-State G & T Assn for 2026-07: 8 plants, 3 GW of nameplate capacity, across 2 states and 4 energy sources.

EIA files this entity as “Tri-State G & T Assn, Inc”.

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: 8
Nameplate capacity: 3 GW
States: 2; CO, NM
Energy sources: 4

Tri-State G & T Assn plants by energy source

Coal1 plants · 1,428 MW
Natural gas4 plants · 891 MW
Petroleum1 plants · 129 MW
Solar2 plants · 255 MW

Full list of Tri-State G & T Assn power plants

Power plants operated by Tri-State G & T Assn, Inc

Craig (CO)Conventional Steam Coal	Tri-State G & T Assn, Inc	Moffat	1,427.6	3	1979	Operating
JM Shafer Generating StationNatural Gas Fired Combined Cycle	Tri-State G & T Assn, Inc	Weld	396.9	7	1994	Operating
PyramidNatural Gas Fired Combustion Turbine	Tri-State G & T Assn, Inc	Hidalgo	186	4	2003	Operating
Limon Generating StationNatural Gas Fired Combustion Turbine	Tri-State G & T Assn, Inc	Lincoln	154.2	2	2002	Operating
Frank KnutsonNatural Gas Fired Combustion Turbine	Tri-State G & T Assn, Inc	Adams	154.2	2	2002	Operating
Axial Basin SolarSolar Photovoltaic	Tri-State G & T Assn, Inc	Moffat	145	1	2025	Operating
Burlington (CO)Petroleum Liquids	Tri-State G & T Assn, Inc	Kit Carson	129.4	2	1977	Standby/Backup
Dolores Canyon SolarSolar Photovoltaic	Tri-State G & T Assn, Inc	Dolores	110	1	2025	Operating

Tri-State G & T Assn: FAQ

How many power plants does Tri-State G & T Assn operate?: EIA-860M lists 8 operating plants against “Tri-State G & T Assn, Inc” for 2026-07, totalling 3 GW of nameplate capacity in 2 states.
Is Tri-State G & T Assn 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.