You hear .. ".. you've overdone the rust on that bridge .. they (who ever the powers-that-be are) would never allow rust like that .."
Columbus Swing Bridge, Lowndes Co., MS (http://bridgehunter.com/ms/lowndes/columbus-swing/)
(https://www.finescalerr.com/smf/proxy.php?request=http%3A%2F%2Fbridgehunter.com%2Fphotos%2F15%2F05%2F150560-M.jpg&hash=bf69b0e2c6a41c91a8f4b0c7e0eb7f57b58d7601)
Hi-Res of above (http://bridgehunter.com/photos/15/05/150560-L.jpg) ...
Americans like to build new things but then we get tired of them and ignore them. Maintenance is something to be cut back until the structure fails. Then we get to build a new one again.
Yeah, I'm cynical but that photos speaks volumes. I was once under a heavy plate girder bridge on an eastern mainline railroad. The web (1/2" steel maybe) was actually rotted through at the bottom flange angles, and the ends of the track stringers didn't rest on the abutments so they bent up and down at every train. Maybe the inspector never got down there.
John