Structurally deficient bridges and poor roads have landed Iowa in the No. 9 spot on a new ranking of the nation's worst infrastructure.

Iowa drivers cross structurally deficient bridges more than 1.3 million times each day, according to the American Road & Transportation Builders Association.

Iowa is 11th in the nation for roads in poor condition, the FHA reports, despite spending $684 per driver on state highways annually, data from the U.S. Census Bureau shows. Iowa's spending is the 12th highest in the nation.

Finally, the infrastructure rankings show just 2.6 percent of Iowa's dams are considered "high hazard," the second-lowest rate in the nation. The U.S. Army Corps of Engineers classifies dams as "high hazard" when "loss of human life is likely if the dam fails."