Most Minnesotans don't realize that largest inland oil spill in U.S. history was here. On March 3, in 1991, the Line 3 pipeline ruptured near Grand Rapids, spilling over 1.7 million gallons of oil into the Prairie River, after a delayed response by Lakehead Pipeline, Enbridge's predecessor. The Prairie flows to the Mississippi. In 1991, there was 18 inches of ice on the river, or millions downstream would have had poisoned water. Thankfully, our territories were still frozen and snow-covered in March, before climate change had fully sunk its teeth.