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Mackinac HVDC Converter Station | St. Ignace, Michigan

ABB was the EPC contractor for American Transmission Company on this high voltage, direct current, converter facility which is the first two-story building of its kind constructed in North America. Gundlach Champion was the Design-Builder for ABB on the 52,000 sq.ft. building and site foundations. This facility, which is located in the southeastern portion of Michigan’s Upper Peninsula, was constructed of hot-dipped galvanized structural steel, precast concrete divider walls and floors, insulated metal wall panels, aluminum sheeted reactor halls, steel mesh-lined valve halls and EPDM membrane roof system. All structural steel and reinforcing steel are tied to a grounding system in order to not disrupt the sensitive equipment housed in the facility. The precast wall panels weighed over 78,000 pounds and were set with a combination of a 350-ton and a 75-ton crane. A multitude of concrete foundations for exterior equipment were also part of the project.

Gundlach Champion managed numerous subcontractors on site, and self-performed the concrete, precast floor and wall panels, structural/miscellaneous steel erection, wall panel installation, and general trades work.

See Project Sheet

Owner: American Transmission Company
Construction Manager: ABB, Inc.
Project Duration: 12 months
Completed: November 2013