American Transmission Co. (ATC) completed its work in the Zoo Interchange to relocate and erect new electric transmission infrastructure to accommodate the Wisconsin Department of Transportation's interchange expansion plans. ATC began the transmission line portion of the project in June 2013 to relocate seven overhead 138-kV transmission lines and erect 59 single pole structures to replace 58 lattice towers. Just over 11 miles of new wire were strung from south of Greenfield Avenue along the east side of USH 45/I-894 in West Allis, north to the Zoo Interchange and then west along I-94 to ATC's Bluemound Substation. The cost of ATC's Zoo Interchange project work totaled $50 million.
