Built in 1921, the complex consists of four locks that help ships navigate the St. Mary's River. The locks play a crucial role in facilitating the transportation of goods and resources between Lake Superior and the lower Great Lakes.
Despite their age, the Soo Locks are well-maintained by the US Army Corps of Engineers, who work diligently to address any potential risks and ensure the continuous operation of the locks. A recent risk assessment classified the complex as having a high risk due to aging infrastructure, which could lead to interruptions in navigation and power generation. To mitigate these risks, the USACE has implemented various measures, including routine monitoring, surveillance, and construction projects to address vulnerable features.
One of the key initiatives currently underway is the construction of a new, high-capacity lock to replace two decommissioned locks. This new lock will provide essential redundancy and ensure continuous operation, even in the event of closures or failures in the existing infrastructure. With these proactive measures in place, the Soo Locks continue to play a vital role in supporting water resource management and climate resilience in the region.
Year Completed |
1921 |
Dam Length |
968 |
River Or Stream |
ST MARY S |
Primary Dam Type |
Concrete |
Surface Area |
20255000 |
Length Of Locks |
1200 |
Hydraulic Height |
14 |
Drainage Area |
181000 |
Nid Storage |
277540000 |
Structural Height |
17 |
Outlet Gates |
Tainter (radial) - 16 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
17 |
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