Click here to register for the Aug. 14 online open house.
Click here to submit your comments about the project. Submission deadline is Sept. 5.
PROJECT STATUS: Plan to file application with the Public Service Commission of Wisconsin in fall 2025.
Project Overview
ATC is proposing an expansion and upgrade of our electric system that would include building new power lines, rebuilding existing power lines and constructing up to five new substations. The project would include parts of Calumet, Fond du Lac, Sheboygan, Ozaukee and Washington counties in east central Wisconsin. This project was requested by ATC’s customer, We Energies, through a Load Interconnection Request.
Project Need
The proposed project is needed to address proposed load increases in the Port Washington area and maintain the safe and reliable operation of ATC’s system.
Project Highlights
Building a new 345-kilovolt power line from the Forest Junction Substation east of Appleton to a new proposed Sheboygan River Substation east of Fond du Lac.
- The Preferred Route would involve a rebuild of an existing single circuit line to a dual-circuit line largely within the existing utility corridor.
- The Alternate Route would involve building a new line adjacent to an existing corridor, where possible, and in new corridors where it’s not possible.
Rebuilding and upgrading existing lines to connect a new proposed Mullet River Substation near Sheboygan Falls with a new proposed Cedar Creek Substation west of Saukville.
- East Route – Rebuild an existing dual-circuit 138/345-kV line to a dual-circuit 345-kV line.
- East Route – Construct two new 138-kV power lines from the existing Holland Substation to a new proposed Adell Substation south of Adell.
- West Route – Rebuild the existing single-circuit 345-kV line as a dual-circuit 345-kV line.
- West Route – Construct a new dual-circuit 345-kV line from the town of Saukville to meet with existing power lines about 9 miles to the west.
Constructing two new dual-circuit lines (four lines) between a new proposed Decker Substation in Port Washington to the existing transmission system
Building up to 5 new substations.
Project open houses
Join us for an online open house:
Thursday, Aug. 14, 2025
5:30 p.m.
Click here to register for the Aug. 14 online open house.
Visit an in-person open house:
Tuesday, Aug. 19, 2025
Noon – 2 p.m. and 4-6 p.m.
Lepanto Banquet Hall
350 E Seven Hills Rd
Port Washington, WI 53074
Wednesday, Aug. 20, 2025
Noon – 2 p.m. and 4-6 p.m.
Amore Banquet Hall
18 W Mill St
Plymouth, WI 53073
