ATC: Boscobel to Lone Rock rebuild project on schedule for December 2019 in-service date

American Transmission Company (ATC) on Jan. 24 filed with the Public Service Commission of Wisconsin a quarterly progress report – for the period ending on Dec. 31, 2016 – for the Boscobel to Lone Rock (Line Y124) Rebuild Project, noting that the project is on schedule for a December 2019 in-service date.

As TransmissionHub reported, the commission, in a September 2016 final decision, granted, subject to conditions, ATC’s application for authority to rebuild about 25 miles of the existing 69-kV transmission line, also known as line Y-124, between the existing Boscobel substation in the city of Boscobel, Grant County, and the Lone Rock substation in the town of Buena Vista, Richland County.

Other than rerouting the line in two segments for a total distance of about nine miles, the existing line would be rebuilt within its existing right of way (ROW), the commission said in its order.

The project has an estimated total cost of about $32.4m, based on an in-service date of 2019, the commission said.

The operating voltage of the line will remain at 69 kV, the commission said. ATC proposes to rebuild about 25 miles of the existing 27.6-mile line, the commission said, adding that the company and its predecessor transmission owner have performed maintenance rebuilding on the remaining 2.6 miles of the line during the past 20 to 30 years. On that section of the line, ATC proposes to selectively replace additional facilities following regular maintenance inspections, the commission said.

In its Jan. 24 report, ATC said that a biological assessment (BA) of federally listed species is being prepared and will be submitted in February. The BA is required as part of the agency consultation between the U.S. Army Corps of Engineers and the U.S. Fish and Wildlife Service, the company said.

The Wisconsin Department of Natural Resources, or DNR, utility permit was issued in late November 2016, the company said, adding that a “DNR Certified ER Review” was finalized in October 2016, and an update will be required prior to construction.

An “NR 216 Storm Water” permit application will be submitted when design is sufficiently complete, the company said.

ATC also noted that while detailed design activities for the transmission line have started, such activities for the substation portion of the project have not started.

Of the approximately $32.4m approved project cost, the actual project cost as of Dec. 31, 2016, was about $1.6m, the company said.

About Corina Rivera-Linares 3286 Articles
Corina Rivera-Linares was TransmissionHub’s chief editor until August 2021, as well as part of the team that established TransmissionHub in 2011. Before joining TransmissionHub, Corina covered renewable energy and environmental issues, as well as transmission, generation, regulation, legislation and ISO/RTO matters at SNL Financial from 2005 to 2011. She has also covered such topics as health, politics, and education for weekly newspapers and national magazines.