"One more covered bridge in Alaska, spanning the Kenai River at Schooner Bend, is about to be replaced by a modern steel and concrete span. The Schooner Bridge is the last of five covered bridges that once spanned streams on the Bureau of Public Roads system in Alaska, three of them on the Seward end of the Kenai road network and one across Mendenhall River near Juneau. Usually used only in damp climates, the shed-like covers on the old wooden bridges were built to keep moisture out of the wooden truss-joints." -- alaskamagazine.com