Great Lakes shipping season nears end as Soo Locks close Friday for maintenance
Great Lakes shipping season nears end as Soo Locks close Friday for maintenance U.S. Army Corps of Engineers A view of the dewatered Poe Lock taken from the upper stop logs. Despite a snow storm crews were busy laying up the lock and staging equipment for the busy maintenance season. and last updated 2021-01-14 07:06:53-05 SAULT STE. MARIE, Mich. (WXYZ) â The Soo Locks in Sault Ste. Marie will close Friday night for two months for critical maintenance, marking the end of the 2020 Great Lakes shipping season. The season runs from the end of March through the middle of January.