EXHIBIT 10.21 Bucyrus International, Inc. 1100 Milwaukee Avenue South Milwaukee, Wisconsin 53172-0500 July 27, 2004 Mr. Timothy W. Sullivan President and Chief Executive Officer Bucyrus International, Inc. 1100 Milwaukee Avenue South Milwaukee,...Letter Agreement • August 16th, 2004 • Bucyrus International Inc • Mining machinery & equip (no oil & gas field mach & equip) • Wisconsin
