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Substation construction planned to begin in 3Q17 on Bunker Hill-Blackbrook Project in Wisconsin

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American Transmission Company (ATC) on April 27 provided an update to the Public Service Commission of Wisconsin on the Bunker Hill-Blackbrook (M13) Project, noting that right of way (ROW) clearing between the Bunker Hill and Blackbrook substations is about 92% complete, and that the remaining work is planned for 4Q17.

As TransmissionHub reported, the commission last July granted, subject to conditions, ATC’s application to build and place in service facilities for the project, which includes building a new substation; rebuilding the 115-kV M13 transmission line from the Bunker Hill switching station in Lincoln County, Wis., to the Blackbrook switching station in Langlade County, Wis.; uprating the 115-kV M13 transmission line from the Kelly substation in Marathon County, Wis., to the Blackbrook switching station; as well as retiring and removing the Bunker Hill and Blackbrook substations.

The route of the rebuild portion of the project begins at the Blackbrook substation in the town of Ackley, Langlade County, and follows the existing M13 line route west to the proposed Ackley substation in the town of Pine River, Lincoln County. The rebuild would take place adjacent to the existing M13 line and is 8.2 miles long, the PSC added, noting that the route of the uprate follows the existing M13 route south from the proposed Ackley substation to the Kelly substation in the village of Weston, Marathon County.

In its April 27 quarterly progress report for the period Jan. 1 through March 31, ATC said that engineering design and procurement is in progress for both the transmission line and substation portions of the project. Substation construction is planned to begin in 3Q17, ATC said.

Environmental monitoring was conducted during ROW clearing, and will continue during transmission and substation construction, the company said.

Expenditures as of March 31 were about $4.8m, or about 16%, of the authorized total of about $29.7m, the company said.

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