Energy Gateway South Transmission Project


Delivering Electricity from New Generating Resources in Carbon County

PacifiCorp's Gateway South Transmission Project is a 416 mile, single-circuit 500-kilovolt (kV), overhead, alternating-current transmission line, beginning near Medicine Bow, Carbon County, Wyoming. The high-voltage transmission line is part of part of PacifiCorp’s Energy Gateway transmission expansion project and will extend south and west to the Clover Substation near Mona, Juab County, Utah. The Energy Gateway transmission expansion will:

  • Serve the growing needs of customers while improving the reliability of its overall transmission system
  • Ensure the system is adequate and capable of meeting future customer load growth
  • Provide more flexibility to move energy resources where they are needed and to maintainlow-cost delivery and service reliability
  • Help shape customers’ future rates instead of leaving it largely exposed to market price volatility and availability of outside resources

Gateway South Transmission Project Groundbreaking

Governor Mark Gordon and Senator John Barrasso joined Rocky Mountain Power at the Gateway South Groundbreaking Ceremony on July 27, 2022. This day marked a major step forward toward the integration of abundant resources to advance an affordable and reliable clean energy future.

Jobs in Wyoming During Construction and Operations

Transmission Line Construction
  • Workforce will range from 50 to 230 individuals
  • Average about 118 workers during the 26 months of active construction
  • Peak monthly workforce of 230 workers
Aeolus Substation Expansion
  • Workforce will range from 10 to 60 individuals
  • Average approximately 35 workers during the 19-month construction period
  • Peak quarterly workforceof approximately 60 workers
  • No additional long-term jobs will be created by the project