SAULT STE. MARIE, Mich., - The Soo Locks’ MacArthur Lock will close to marine traffic 7:00 a.m. Dec. 15, 2021 through 12:01 a.m. April 30, 2022 to perform critical maintenance.
The Poe Lock will remain open until 11:59 p.m. Jan. 15, 2022 or until commercial traffic ceases, whichever occurs first. The operating season is fixed by federal regulation and is driven in part by vessel operation ability in typical ice conditions.
“The 800-foot-long MacArthur Lock, built in 1943, is 78 years old; the maintenance period is critical to keeping the lock in operation during the shipping season,” Maintenance Branch Chief LeighAnn Ryckeghem said.