American Transmission Company (ATC) is proposing the Spring Valley-North Lake Geneva Electric Reliability Project, which includes an approximately 25-mile, 138-kV transmission line in Wisconsin.
The line will stretch from the existing North Lake Geneva substation in southern Walworth County to the existing Spring Valley substation in western Kenosha County.
The estimated $80.6m project also includes a new electric substation near Twin Lakes; a new 69-kV line that will connect the new substation to the existing substation in Twin Lakes; and rebuilding the existing 69-kV line from the Katzenberg substation to the Twin Lakes substation, along with other area maintenance work.
An ATC spokesperson told TransmissionHub on Jan. 18 that the project has been planned for several years now and it mostly derives from the company’s coordination with its local distribution companies, which, in this case, are Alliant Energy (NYSE:LNT)and Wisconsin Energy (NYSE:WEC) subsidiary We Energies.
“The engineers for both of those utilities have been working with American Transmission Company for the past several years because there are some operational challenges in the area,” she said. “Right now, the system is becoming close to being overloaded and We Energies and Alliant face some operational challenges. In the event there was an outage on the line or substation, or some other component, options for back-up are limited and that in turn could lead to service interruption.”
ATC has also forecast that by the early 2020s, that particular region will be compromised by increased growth and electricity demand, resulting in overloaded lines.
“This project is a long-term economic solution that meets the needs of both utilities and ATC,” the spokesperson said.
ATC on Jan. 15 said that the area’s electric transmission system is vulnerable to low voltages and power outages and will no longer adequately support the lower-voltage distribution system.
ATC’s studies show that the project would strengthen the electric transmission system to meet growing electricity use. ATC also said that the project will provide system redundancy and allow for maintenance outages to equipment and facilities when repairs are needed.
After it hosts two open houses Jan. 29–30, ATC will narrow the potential route options and conduct additional open houses later this year before filing an application in 2014 with Wisconsin state regulators for permission to build the power line and substation.
If approved, construction would begin in 2016 to meet an in-service date of 2019, ATC said.