Navajo Bridge
First spanning Marble Canyon in 1929, the Navajo Bridge replaced the ferry crossing at Lee's Ferry--and good thing, too, for crossing the Colorado Rover via the ferry, especially in high water and rough weather was never a sure thing. For years, this bridge was an incredible boon to the entire region, allowing a large volume of traffic to flow readily over the river.
In time the bridge, being narrow by modern standards, needed replacing, and gave way in 1997 to the new modern version of the bridge. And modern day traffic continues to use this bridge as progress continues.