ST. PAUL, Minnesota, Sept. 30 -- The U.S. Army Corps of Engineers-St. Paul District issued the following news release: The U.S. Army Corps of Engineers, St. Paul District, awarded a $2.4 million contract to American Mine Services (AMS) of Boulder, Colorado, on Sept. 28, to construct bulkhead slots on the intermediate wall and river wall upstream of the miter gates in the auxiliary lock chamber at Lock and Dam 3 located in Welch, Minnesota, on the Mississippi River. The project work consists of  more