The Soo Locks’ MacArthur Lock will close for the Navigation Season to conduct seasonal repairs and maintenance on December 16, 2024.
The Poe Lock will remain open until Jan. 15, 2025, or until commercial traffic ceases, whichever occurs first. The Soo Locks operating season is fixed by federal regulation (33 CFR 207.440).
“The 800-foot-long MacArthur Lock, built in 1943, is now 81 years old; this maintenance period is critical to keeping the lock in operation during the shipping season,” Maintenance Branch Chief Nicholas Pettit said.
The MacArthur Lock has seen 2,806 lockages and 5,170 passages (number of vessels) since opening April 24, 2024, to now, December 12, 2024.