Bridge Collapse Due to Design Miscalculation

The Minneapolis bridge that collapsed on August 1, 2007 killing thirteen people and injuring 145 others failed due to an error by the firm that designed the bridge, according to the National Transportation Safety Board's final report issued on November 14, 2008. The firm, Sverdrup & Parcel, not in business any more, miscalculated the size of supporting steel plates. For more information on the accident and the report, click here for an article from the Chicago Tribute.