The concrete bridge is still in place across the Mokelumne River near Lodi. It is on a portion of the Central California Traction line north of Lodi that is normally no longer used but has seen some service recently for car storage. You must have it mixed up with the U.P. bridge crossing the same river located a mile or so west. We have canoed and kayaked under both bridges so are very familiar with their locations. Makes a nice paddle combined with s swim on a warm day!