Gateway West Transmission Line Project

On July 30, 2018, Rocky Mountain Power (Applicant) filed an application for a Permit to construct and operate the Gateway West Transmission Line Project in Carbon County and Sweetwater County.  The applicant proposes to construct and operate a total of 191.4 miles of 500-kilovolt (kV), 230-kV, and 345-kV alternating Current (AC) electric transmission lines and associated substation facilities as part of their Energy Vision 2020 plan.  The 500-kV/345-kV portion of the project begins in Carbon County 20 miles northeast of the Town of Hanna, heading west passing just north of Hanna. It then continues along the I-80 corridor to the west from Sinclair to Point of Rocks, Wyoming into Sweetwater County and eventually terminates at the existing Jim Bridger Substation near Superior.  The 230-kV portion of the project is located entirely in Carbon County and begins approximately 10 miles northwest of Medicine Bow and heads southwest terminating immediately southeast of the town of Hanna.  The proposed project crosses 101.8 miles of private land, 74.3 miles of BLM-managed land, and 14.7 miles of State land, and 0.7 miles of water body crossings.  Construction is anticipated to commence in Q2 2019 and be completed by Q3 2020.  Construction manpower is anticipated to average 325 workers over the duration of the construction period from April 2019 through October 2020 and peak at 511 workers in October 2019.  The hearing on this matter is anticipated on October 25, 2018, in Rawlins, Wyoming.


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