Not deficient: Neither deficient or obsolete.
Functionally obsolete: Outdated and do not meet current design standards required of new bridges.
Structurally Deficient: Significant load-carrying elements are in poor condition or the waterway adequacy is insufficient. A structurally deficient bridge isn’t unsafe; if a bridge is unsafe, it is closed.
Add or remove bridges, based on status
Source: National Bridge Inventory, 2013 data; bridge location data is not always exact, though they are rarely off by more than a few hundred feet.