Congress authorizes about $250 million to rebuild the 35W bridge.Īugust 14, 2007: The Minnesota Legislature quickly established a Joint Committee to Investigate the Bridge Collapse comprised of sixteen legislators from both the House and Senate transportation committees. This chronology outlines some of the significant events regarding the I-35W Bridge collapse and the efforts to build a new bridge:Īugust 1, 2007: Shortly after 6 pm, the I-35W Bridge collapses with 111 motor vehicles on it at the time.Īugust 4, 2007: Mn/DOT issues a request for qualifications for a Design Build Contract for the I-35W Bridge replacement project. This guide pulls together many of those reports and links to materials that record the State of Minnesota’s response to the tragic collapse and its efforts to quickly replace that vital link over the Mississippi River. In Minnesota, citizens and government officials alike sought access to MnDOT bridge inspection reports, Federal Highway Administration documents, and other records related to the history, maintenance, and safety of the 35W bridge – and all other bridges in the state. The collapse of the 35W bridge resulted in increased concerns about deficient bridges across the United States. of the gusset plates at the U10 nodes, which failed under a combination of (1) substantial increases in the weight of the bridge, which resulted from previous bridge modifications, and (2) the traffic and concentrated construction loads on the bridge on the day of the collapse.”Ī replacement bridge was designed and constructed on an accelerated schedule and opened on September 18, 2008, not long after the first anniversary of the collapse. The National Transportation Safety Board ultimately determined that the probable cause of the collapse of the I-35W bridge “was the inadequate load capacity, due to a design error. Thirteen people died and 145 were injured. Without warning, the bridge collapsed, taking with it 111 vehicles.
Shortly after 6 pm on August 1, 2007, the Interstate 35W bridge over the Mississippi River near downtown Minneapolis was loaded with rush hour traffic creeping through an ongoing construction project. It introduces the topic and points to sources for further research. This guide is compiled by staff at the Minnesota Legislative Reference Library on a topic of interest to state legislators. Minneapolis Interstate 35W Bridge Collapse Last reviewed October 2020 Minnesota Issues Resource Guides
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