American Transmission Company (ATC) on July 20 filed with the Public Service Commission of Wisconsin a quarterly progress report for the period April 1 through June 30, for the St. Martins-Edgewood-Mukwonago Rebuild Project.
As TransmissionHub reported, the commission in October 2015 approved the rebuild of the line in southeastern Wisconsin where the lattice structures are almost 90 years old and at the end of their useful life.
ATC’s request for a one-year extension to begin construction on rebuilding existing 138-kV electric transmission line and substation facilities between the existing St. Martins and Edgewood substations, and between the Edgewood and Mukwonago substations, was granted last year.
According to a Nov. 15, 2016, filing by the state Division of Energy Regulation, the commission in October 2015 approved ATC’s application for authority to rebuild the existing 138-kV lines. Order Condition 15 in the final decision stated that “if ATC does not begin on-site physical construction within one year of the effective date of this certificate of authority and order, the certificate authorizing the approved project shall become void unless ATC: files a written request for an extension of time with the commission before the date on which the certificate becomes void, and is granted an extension by the commission.”
ATC in August 2016 filed a written request for extension to begin construction for the approved project, the division said, adding that the company’s stated reasons for its request were “resource constraints, primarily the availability of construction labor.”
ATC requested an extension of one year, until September 2018, in order to begin construction, the division said.
In its July 20 filing, ATC said that construction is scheduled to begin in 2018, and be completed by June 2019.
The company said that for the transmission line portion of the project, the transmission line construction specification was issued for construction; “constructability walkdown” by the right of way (ROW) clearing contractor took place to determine matting needs for both circuits; the transmission line conductor, insulators, and hardware were ordered; and the steel pole bid was awarded, with vendor drawings being received and reviewed.
For the substation portion of the project, St. Martins substation drawings were issued for construction; the miscellaneous material for the St. Martins substation was ordered; and the detailed design was started for the Mukwonago substation.
Actual project costs as of June 30 were about $2.2m, out of the approved total project costs of about $24.7m, the company said.