The Soo Locks’ MacArthur Lock is opening to marine traffic today after undergoing a critical repair that took longer than officials expected it would.

The Army Corps of Engineers will receive $479 million from the Infrastructure Investment and Jobs Act to modernize the Soo Locks.

The Soo Locks in Sault Ste.

The Soo Locks see almost 90 percent of the world's iron ore go through them. So again, why is this place, known as the Soo Locks, so important? Because without the Soo Locks, the U.S. economy would plunge into a deep recession. In light of that, what exactly are the Soo Locks, and what function do they provide that's so vital to the U.S. economy? Heres a deeper look at unlocking the past, present and future importance of the Soo Locks, an engineering marvel that is beyond crucial to North American manufacturing industries.

The Soo Locks see almost 90 percent of the world's iron ore go through them. So again, why is this place, known as the Soo Locks, so important? Because without the Soo Locks, the U.S. economy would plunge into a deep recession. In light of that, what exactly are the Soo Locks, and what function do they provide that's so vital to the U.S. economy? Here’s a deeper look at unlocking the past, present and future importance of the Soo Locks, an engineering marvel that is beyond crucial to North American manufacturing industries.