Although the Federal Highway Administration collects all kinds of data on the condition of bridges it’s not presented in a consumer friendly format. You can download files by Deficient Bridges by State and Highway System, Highway Bridge by Owner or Bridge by State.
A Deficient or Obsolete Bridges database with a state by state map has been assembled by MSNBC. Select a state, then click on the small type link, “Click here to see major state bridges on list”. Find out whether the bridge is obsolete or deficient (an engineering distinction, both of which sound bad) and its safety rating. Keep in mind that the last structural evaluation for the Minneapolis bridge concluded: “Meets minimum tolerable limits to be left in place as is”.