American Transmission Company (ATC) on Jan. 15 told the Public Service Commission of Wisconsin that actual expenditures as of Dec. 31, 2018, for the Riverside Project totaled about $31.4m, compared to the commission-authorized amount for the total gross project cost of about $42.1m.
The company said that the anticipated in-service date for the project is April, and that all activities necessary to support the in-service date remain on schedule.
Regarding transmission line construction, ATC said that foundation installation was completed. Structure setting began and is about 75% complete. The company added that wire stringing activities are scheduled to begin in February and be completed by March.
ATC noted that below-grade construction at the Kittyhawk substation was completed. Above-grade construction began in October 2018, and will continue through the end of March.
ATC also said that remote end construction at the Rockdale and Paddock substations is scheduled to begin in March.
As TransmissionHub reported, the commission, in a Jan. 12, 2018, final decision, approved ATC’s June 2017 application for a certificate of public convenience and necessity (CPCN) regarding new 345-kV electric transmission facilities.
As noted in that decision, the West Riverside interconnection project includes 345-kV electric transmission facilities required to connect the West Riverside Electric Generation facility (West Riverside) to ATC’s existing electric transmission system. The commission noted that it has previously approved the construction by Wisconsin Power and Light (WP&L) of West Riverside in a separate docket.
Describing the transmission project and its purpose, the commission noted that ATC proposes to build a new loop-in, loop-out 345-kV transmission line from its Line W10. The project includes construction of a new 345-kV substation to be named Kittyhawk; a new loop-in, loop-out 345-kV, double-circuit line that will tap into existing ATC Line W10; an upgrade to the protective relay packages at the existing Paddock and Rockdale substations; and an upgrade to the protective relay settings at the existing Rock River and Townline Road substations.
The line would be built using weathering steel monopole structures with davit arms or a delta configuration, depending on the route segments selected, the commission said.