August 1, 2007 – I-35 bridge collapse

During rush hour on this night in 2007 the I-35 Mississippi River bridge in Minneapolis, Minnesota suddenly collapsed, resulting in 13 deaths and 145 injuries. The bridge had originally opened in 1967 and a design flat was cited as the cause of the collapse. The NTSB found the like likely cause of the collapse to be too-thin gusset plate that ripped along a line of rivets, and they asserted that additional weight on the bridge at the time of the collapse contributed to the catastrophic failure. The bridge was replaced by the I-35 Saint Anthony Falls Bridge, which opened September 18, 2008. At 6:05 pm local time traffic was moving precariously slow across the eight-lane bridge when the central span suddenly collapsed, causing the adjoining spans to fall as well. The structure and deck collapsed into the river and onto the riverbanks below, the south part fell 81 feet eastward in the collapse. There were 111 vehicles involved, the farthest falling 115 feet down to the river or onto its banks. Northern sections of the bridge fell into a rail yard, landing on three unoccupied and stationary freight cars. Photo 1 by Mike Wills – Flickr, CC BY-SA 2.0,2 by Kevin Rofidal, United States Coast Guard – Wikipedia:Contact us/Photo submission, Public Domain

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