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10. Mississippi

Percentage of deficient bridges: 15.5
Number of deficient bridges: 2,650
Total number of bridges: 17,063

The Bay Bridge near Bay St. Louis was almost completely destroyed by a tidal surge from Hurricane Katrina in September 2005. It wasn't until May 2007 that two lanes of a newly constructed bridge were opened to traffic.

Source: Transportation for America, Mississippi Department of Transportation

Source: Getty Images