Most bridges are able to support the weight of an 80,000 lb. semi fully loaded. I don't know what the actual weight would be at any given time, but there is something fishy that would cause a bridge to drop straight down.
Also have to remember that when these bridges were built, in the winter, the State of Minnesota used straight, 100 percent salt to deice the roads. As you know, salt rusts metal and just grinds everything else, so my guess is that years of salt usage and not being cleaned off led to the deterioration of this bridge. There are other bridges and roadways around the country that are in just as tough shape, but, for the grace of God, they haven't crashed . . . yet.
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Pete
Above Him there is no other . . . John 14:6.
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