This effort would bring the remaining 20% of Tri-State’s member load into an organized market.

More than two dozen parties agree to Phase I settlement, which sets near-term targets for greenhouse gas emission reductions in Colorado.

Tri-State recently allocated $50,000 to support La Plata Electric Association’s air-source heat pump water heater pilot project.

Tri-State approves the return of $10 million in patronage capital refunds to its members, a hallmark benefit of cooperative membership.

Tri-State has been provided notice by United Power that the distribution cooperative intends to withdraw from membership.

Today, wholesale power supply cooperative Tri-State announced Reg Rudolph will join its senior leadership team in the newly created role of Chief Ener...

200-MW wind project the second of eight renewable energy projects in Tri-State’s Responsible Energy Plan

Tariff advances contract flexibility, key component of Tri-State’s transformative Responsible Energy Plan.

Settlement filing reduces OATT customer transmission rates and increases transparency.