Springerville Unit 3 Holding LLC is a privately held entity that owns Unit 3 of the Springerville Generating Station, a coal-fired power plant located in Springerville, Arizona. The company is a wholly-owned subsidiary of Tri-State Generation and Transmission Association Inc., a not-for-profit wholesale electric power generation and transmission utility headquartered in Westminster, Colorado.
The company's primary operation involves the ownership of Springerville Generating Station Unit 3, which commenced operation in 2006 and has a generating capacity of 458 megawatts (MW). This unit, along with the other units at the Springerville Generating Station, supplies power to various entities including Tucson Electric Power (TEP), Tri-State Generation & Transmission, and the Salt River Project (SRP). Although Springerville Unit 3 Holding LLC owns the unit, Tucson Electric Power operates all four units at the Springerville plant. Tri-State Generation and Transmission Association announced in December 2023 that Springerville Unit 3 is slated for retirement in 2031.
Springerville Unit 3 Holding LLC's patent litigation posture is that of an operating company defending against assertions. The company has appeared as a defendant in one tracked case and has no recorded appearances as a plaintiff. This single case is in the Arizona District Court.
The company is a defendant in the case Midwest Energy Emissions Corp. et al. v. Tucson Electric Power Co. et al., which was filed in the Arizona District Court on July 30, 2024. This litigation context is likely tied to the operations of Springerville Generating Station Unit 3.