Transmission projects

Transmission projects

Tri-State continues to invest in transmission infrastructure to ensure dependable power delivery to its 43 member cooperatives throughout its four-state service territory. The West’s vast power supply network is currently strained – improvements and expansion to the system are essential to enhancing regional power reliability.

Additional transmission facilities open the door to diverse energy resources that include renewable energy. The investments in additional lines support renewable energy projects by alleviating transmission constraints to make projects economically viable. Expanding Tri-State's transmission network facilitates the G&T's ongoing pursuit of additional renewable resources.


Active projects



Frequently discussed topics

Tri-State has gathered background information about a few key topics as they pertain to transmission line construction and operations. 

Understanding the siting, environmental and permitting process
Tri-State uses an open and comprehensive siting process that considers electric system planning, economic, environmental, public involvement, regulatory, land rights and engineering considerations. Learn more.

Rights of way for power lines and access roads
Once a route is selected and the necessary land use permits have been obtained, Tri-State works directly with affected landowners and other stakeholders to acquire the necessary power line and access easements for projects. Learn more.

Information about undergrounding high-voltage transmission lines
High-voltage overhead transmission lines are a reliable, low cost, easily maintained, and an established method to transport bulk electricity across long distances. An underground line is expected to be 4 to 10 times the cost of an overhead line due to time, materials, process and the use of specialized labor. If a landowner or jurisdictional body wishes to bury a line, a formal request must be submitted to Tri-State. Learn more.

Environmental Health
Electromagnetic fields (EMFs) are found wherever there is a flow of electricity, such as in the use of electric lights, appliances, computers, power lines, home wiring and any other devices that carry or use electricity. Concerns have been raised about EMF and health issues. Tri-State encourages everyone to review the research and information available on the subject and make their own assessment. For further EMF information consult the following: Tri-State EMF Position Statement, EMF and Your Health – 2015 Update, National Institute of Environmental Health Sciences, and the World Health Organization (WHO).