I-35W Mississippi River bridge
Bridge in Minneapolis, Minn., US, that collapsed in 2007 / From Wikipedia, the free encyclopedia
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The I-35W Mississippi River bridge (officially known as Bridge 9340) was an eight-lane, steel truss arch bridge that carried Interstate 35W across the Mississippi River one-half mile (875 m) downstream from the Saint Anthony Falls in Minneapolis, Minnesota, United States. The bridge opened in 1967 and was Minnesota's third busiest,[4][5] carrying 140,000 vehicles daily.[3] It experienced a catastrophic failure during the evening rush hour on August 1, 2007, killing 13 people and injuring 145. The NTSB cited a design flaw as the likely cause of the collapse, noting that an excessively thin gusset plate ripped along a line of rivets, and that additional weight on the bridge at the time contributed to the catastrophic failure.[6]
I-35W Mississippi River bridge | |
---|---|
Coordinates | 44°58′44″N 93°14′42″W |
Carried | 8 lanes of I-35W |
Crossed | Mississippi River |
Locale | Minneapolis, Minnesota, U.S. |
Official name | Bridge 9340 |
Maintained by | Minnesota Department of Transportation (Mn/DOT) |
ID number | 9340 |
Characteristics | |
Design | Continuous truss bridge |
Total length | 1,907 ft (581.3 m) |
Width | 113.3 ft (34.5 m) |
Height | 115 ft (35.1 m) |
Longest span | 456 ft (139 m)[1] |
Clearance below | 64 ft (19.5 m) |
History | |
Construction start | 1964[2] |
Opened | November 1967 |
Collapsed | August 1, 2007 |
Statistics | |
Daily traffic | 140,000[3] |
Location | |
Help came immediately from mutual aid in the seven-county Minneapolis–Saint Paul metropolitan area and emergency response personnel, charities, and volunteers.[7][8][9] Within a few days of the collapse, the Minnesota Department of Transportation (MnDOT) planned its replacement with the I-35W Saint Anthony Falls Bridge. Construction on the replacement bridge was completed quickly, with it opening on September 18, 2008.[10][11]