McNally Tunneling Corporation, a subsidiary of Weeks Marine Inc., is a heavy/civil construction company that specializes in large diameter tunneling and underground construction. McNally has been successfully completing projects throughout the United States ranging in cost from $350,000 to $200Mil since the company was formed in 1988. ISO 9001:2015 (Quality), ISO 14001:2015 (Environmental) and OSHAS 18001:2007 (Health and Safety).