By Brady Slater, Duluth News Tribune
When it comes to the shipping industry, "summer sailing" is the best sailing on the Great Lakes. Not yet braced for November's gales and free of spring's lingering ice, summer sailing finds the big ore boats and other vessels running at optimal speed.
But a shutdown this week of one of the two operating Soo Locks in Sault Ste. Marie, Mich., has slowed the industry when it least expected it.
http://www.duluthnewstribune.com/business/shipping/3811100-out-service-soo-lock-slows-shipping-great-lakes