Gateway Central

Energy use is on the rise and electrical demand is fast approaching the limits of the existing transmission system. This growth in demand for electrical energy comes from both new and existing customers. Additionally, customer and legislative changes are driving a need for increased development of renewable resources as part of the resource mix. To meet the increasing demand, new facilities are needed.

The first major segment of our Energy Gateway Transmission Expansion – Populus to Terminal – was placed into service in November 2010. The second major line segment – Mona to Oquirrh – was placed into service in May 2013. 

Completed segments

Segment in progress

Segment C – Oquirrh to Terminal

Project overview

New transmission lines and substations are necessary to provide additional capacity to serve the growing electrical demand of customers and to improve reliability and operational flexibility of the electrical system. These additional transmission facilities are also needed to prepare for future generation resources.
Our company is committed to providing safe, reliable, cost-effective power and has proposed a project to establish new 14 mile, double circuit 345-kilovolt transmission line connecting two substations in the Salt Lake City area. The line will be located in an existing high-voltage transmission line corridor. It will run between the Oquirrh substation, near 10200 South and 5600 West in West Jordan, north to the Terminal substation, located south of the Salt Lake City International airport. This section of new transmission will link together other new transmission line sections – Mona to Oquirrh and Populus to Terminal –to complete the Gateway Central portion of the Energy Gateway Transmission Expansion. Completion of the project will be determined by customer need with a current projected in service by 2024. If the timing of the need changes, the project schedule will be adjusted to meet the need.

Project timeline

  • Informational meetings – July 2009 - project completion
  • Obtain rights-of-way – completed 2009 - 2014
  • Permitting – 2023
  • Construction – 2023 - 2024
  • Estimated line in service for customers – 2024

Additional information about the project

Public input is a very important part of this process, and the Company is eager to involve the public in all stages of this transmission line development. Additional information about this proposed transmission line will be posted on this website as the project progresses and details are developed. Please check back periodically for updates, including the current Oquirrh to Terminal maps: Terminal to Lake ParkWest Valley and Hoggard to Oquirrh
To contact us about this project, please email Please be sure to include the project name – "Oquirrh to Terminal"– in your inquiry. 


(Updated March 2021)