The Soo Locks in Sault Ste. Marie, Mich., will close to all marine traffic beginning just before midnight tonight or until commercial traffic ceases, through 12:01 a.m. on March 25 to perform seasonal critical maintenance.
Federal regulation (33 CFR 207.440) establishes the operating season based on the feasibility of vessels operating during typical Great Lakes ice conditions.
“Every year, the Corps of Engineers uses the non-navigation winter period to perform maintenance and keep the Soo Locks...