Workers with West Point Contractors, Inc., the U.S. Army Corps of Engineer Los Angeles District’s contractor, clear rocks and vegetation Apr. 9 as they prepare to construct a bridge across the Chula Vista Wash in Nogales, Ariz. The $4M project will consist of constructing a two-span, I-girder concrete bridge, install associated road base and approach slabs, and placing grouted riprap both upstream and downstream of the project in the channel.