Initial accession consists of 24 feet of BILLBOARD INVENTORY from 1966 to 2005, record control number 720314 BILLBOARD INVENTORY This series contains computer listing of all billboards in state, with information such as location, date erected, information on billboard. Paper version of computer list along with initial survey forms with photographs of signs. Forms are arranged by DOT section or district. February 16, 2010 accession consists of printouts of the computerized BILLBOARD INVENTORY maintained by the Department of Transportation, dating from 1966 to 2007, the printouts document the location, owner and condition of billboards along North Dakota highways, interstates and other roads maintained by the state (720314), printouts are housed in boxes 25-37. May 4, 2010 accession consists of two feet of rc 720314 BILLBOARD INVENTORY, billboard sign buyouts from approximately 1968 to 1990, files are located in boxes 38 and 39.