Raghorn Transmission Line EPC / Design-Build

Raghorn Transmission Line

Client Idaho National Laboratory (INL)
Completion Date 2021
Location Idaho

Sturgeon Electric constructed 16.5 miles of new 138kV transmission line, five miles of distribution underbuild, and performed work at two substations for this project, which was delivered under an engineer-procure-construct (EPC) contract.

The project allows the INL, part of the U.S. Department of Energy’s complex of national laboratories and home to the nation’s leading laboratory for nuclear energy research, to perform grid reliability and resilience testing.

Sturgeon Electric crews installed 397.5 Ibis ACSR conductor and 288-count fiber optical ground wire (OPGW) the entire length of the line and to the five miles of 12.47/13.8kV distribution underbuild and converted a section of existing distribution to underground. The above-grade lines were built on ductile iron monopoles.

At the Scoville Substation, Sturgeon Electric crews installed a new line termination bay and new electrical equipment at the Obsidian Test Pad substation. The project was completed within budget and on time despite the difficulty of acquiring materials during the COVID-19 global pandemic. Sturgeon Electric overcame this challenge by drawing upon our broad-reaching contracts around the country to find materials when their availability was limited.