Tri-State will more than double its emissions-free renewable solar energy through a new project with Boulder, Colorado-based juwi Inc.

High-level report by Rocky Mountain Institute cannot accurately forecast Tri-State's future costs.

The City of Boulder signed a contract with Tri-State for the sale of hydroelectric power generated at five of the city’s eight hydroelectric plants.

Tri-State held its 66th Annual Meeting in 2018, with 440 electric cooperative representatives and industry officials in attendance.

A $50,000 grant will improve financial stability, expand entrepreneurial opportunities and increase economic vitality in the West End of Montrose Coun...

The Mountain West Transmission Group announced today that it has completed initial discussions with the Southwest Power Pool’s (SPP) management team, ...

Tri-State is upgrading an existing transmission line segment between the Montrose Substation west of Montrose, Colorado, to the Nucla Substation near ...

Agreement with United Mine Workers of America allows New Horizon Mine in Nucla to begin reclamation activities.

More than 100 people attended the Alta Luna Solar Project ribbon-cutting ceremony March 16, 2017, to celebrate the completion of a 258-acre, 109,239 s...