Tennessee has 19,838 bridges. 4,101 are deficient. Of those deficient bridges, 2,776 are fully operational while 1,325 are structurally deficient.
The United States has 599,766 bridges. 152,316 are deficient. Of those deficient bridges, 79,792 are fully operational while 72,524 are structurally deficient. See a PDF map of the structurally deficient bridges done by the Bureau of Transportation Statistics. The map is an effort to geocode bridges from the Federal Highway Administration’s National Bridge Inventory (NBI) with data from 2007 except for Kentucky and Pennsylvania which was from 2006. See more information at CleanBeta.
Note: This is the kind of post that my wife hates. She will now have me performing miracles to get from point A to point B without crossing any bridges when we travel.