The I-35W Mississippi River bridge (officially known simply as Bridge 9340) was an eight-lane steel truss arch bridge that carried Interstate 35W across the Mississippi River in Minneapolis, Minnesota, United States. The bridge was completed in 1967, and its maintenance was performed by the Minnesota Department of Transportation. The bridge was Minnesota's fifth–busiest,[8][9] carrying 140,000 vehicles daily.[10] The bridge catastrophically failed during the evening rush hour on 1 August 2007, collapsing to the river and riverbanks beneath.