Gaps no longer bridged

I love bridges and feel bad when they're closed or destroyed. We have some beauties along the Colorado River, some the sort that require one vehicle to wait while the other makes the crossing, since there's only one lane. I see that the Crown Point Bridge, a large and important truss bridge, was officially known as the Champlain Bridge. The image accompanying this entry is of a souvenir tee-shirt from the collapse of the Green Island Bridge in 1977. It happened when the ice was going out. This is part of the scan-o-rama series. Sorry about the wrinkles! The image is copyrighted by Dahl Taylor (this Dahl Taylor?). The legend says "blub."