Right off the bat, I noticed that “structurally deficient or functionally obsolete” statement, too. Gee, does that sound like weasel wording.
Even “structurally deficient” could mean anything from “near critical failure”, to “fails in one inspection area—excessive rust on 1 bolt”.
But “functionally obsolete” takes the cake as being meaningless gobbledygook. The function of a bridge is to bridge something. If it is properly doing that, it is functional.
Obsolete, on the other hand, is not based on what the bridge is doing, but what you want to do with it. Obsolescence just means that you are no longer satisfied with what it is, you want it to do something it currently cannot. Something becomes obsolete with the stroke of a pen.
Those terms have specific definitions for inspection and bridge management purposes. Don’t have them with me, they are at work.
Depending on the bridge, this could be very, very imporant. As you may recall, the Silver Bridge collapse in Point Pleasant, West Virginia, was caused by the failure of a single eyebar.