On our way to Kingman, we go over Hoover Dam. The new bridge is under construction and will be done late 2010. It's immense and so amazing to see these monstrous concrete partial arches. The arches will ultimately support the road. Those 2 tall silver towers to the left support all the cables holding up the arch while it "sets".
Here you can see the 2 sides of the bridge and all the cabling holding the arches temporarily in place.