A worker spray-cleans equipment used this week to install part of a 12-inch-thick concrete floor constructed as part of a 100,800-square-foot expansion at the Kawasaki Motors Manufacturing Corp. U.S.A. plant in Maryville. Plant Manager and Vice President Steve Bratt said the thick layer of concrete is necessary in order to reduce vibration levels in a part of the plant where aluminum engine parts will be machined to extremely fine tolerances. TONY BROWN/DAILY FORUM