https://www.lrd.usace.army.mil/News/News-Releases/Display/Article/4429668/soo-locks-to-open-for-2026-shipping-season/

SAULT STE. MARIE, Mich. --

The U.S. Army Corps of Engineers, Detroit District will open the Poe Lock, part of the Soo Locks, in Sault Ste. Marie, Michigan to all marine traffic at 12:01 a.m. EST on March 25, marking the start of the 2026 Great Lakes shipping season.

Federal regulation (33 CFR 207.440) establishes the operating season based on the feasibility of vessels operating during typical Great Lakes ice conditions.

“Our winter closure period is essential for conducting critical inspections, repairs and maintenance on our aging infrastructure,” Soo Locks Operations Manager LeighAnn Ryckeghem said. “The reliability of Great Lakes navigation and the momentum of the American industrial supply chain depend on getting this work done.”