The Department of the Army Corps of Engineers awarded a $360,000 firm fixed price purchase order to Choctaw Transportation Company, Inc. to supply and deliver 6,000 tons of 400-pound riprap limestone to fill a scour hole at Olmsted Locks and Dam in Olmsted, Illinois. This contract was awarded under a total small business set-aside for North American Industry Classification System (NAICS) code 237310, for quarrying and nonmetallic minerals, other than fuels, with a size standard of 500 employees. The limestone is to be delivered between May 1 and August 30, 2021 to support operations at Olmsted Locks and Dam, a navigation lock and hydroelectric dam operated by the Corps on the Ohio River near Paducah, Kentucky, to maintain a nine-foot navigation channel.