I-35W Mississippi River bridge
The I-35W Mississippi River bridge was an eight-lane steel arch bridge in Minneapolis, Minnesota. It opened in 1967. It was the third busiest bridge in Minnesota. It carried over 140,000 vehicles daily.
On August 1, 2007, during the evening rush hour, a major failure caused the bridge to fall down. The bridge collapse killed 13 people. The U.S. National Transportation Safety Board said a problem with the design probably caused the bridge to fall. They said a too-thin steel plate ripped along a line of rivets. Also, additional weight at the time led to the major failure that caused the bridge to fall into the Mississippi River.