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 its Spring Valley-N. Lake Geneva Project, noting that the project is currently in design for the transmission lines and all substations, with the exception of the Balsam substation.
Balsam substation site preparation and grading work started in mid-July, the company said.
As TransmissionHub reported, the commission has approved the project, which consists of a new 23-mile, 138-kV line, new substation and short 69-kV line in southeast Wisconsin.
The commission approved Proposed Route 1, the blue route, for the project, which is a 23-mile transmission line from the existing North Lake Geneva substation in southern Walworth County to the existing Spring Valley substation in western Kenosha County.
The project includes a new substation, the Balsam substation, to be located on the north side of County Highway 50 in Wheatland, Wis., along with a 4-mile 69-kV line that will connect the Balsam substation to the existing Twin Lakes substation in Twin Lakes, Wis., according to ATC.
The project is needed because the transmission system in the area is vulnerable to low voltages and power outages, and will no longer adequately support the distribution system, according to ATC; it will also provide system redundancy and allow for maintenance outages when repairs are needed in the area.
According to the July 20 progress report, the start of construction for the remaining transmission lines and substations projects are as such:
- Substation construction start: Spring Valley substation – April 2018; North Lake Geneva substation – February 2018; Bain substation – October 2018
- Transmission line construction start: X104 North Lake Geneva SS to Balsam SS – August 2018; Y102 Balsam SS to Katzenberg SS – October 2018; X105 Balsam SS to Spring Valley SS – January 2019; 63141 Bain SS to Spring Valley SS – August 2019
Among other things, ATC noted that cultural resource surveys were completed and reports of the findings will be submitted next quarter. The company noted that while it applied for the Army Corps of Engineers permit for the project in May 2016, it has not yet received the permit. The Army Corps requested archaeological surveys in all permitted areas to complete its Section 106 review, ATC said, adding that survey reports will be sent to the Army Corps next quarter as well.
The anticipated in-service date is December 2019, ATC said.
Gross project expenditures as of June 30 were about $8.6m, or 12.13% of the authorized total of $70.6m, ATC said.