1968 I-15-1(21)0 (Interstate 15, St. George to Arizona State Border)
The 1968 I-15-1(21)0 (Interstate 15, St. George to Arizona State Border, Utah) vertical, black and white (panchromatic) aerial project was acquired by the Utah Department of Highways (UDOH), now the Utah Department of Transportation (UDOT), at a scale of 1:4800 (1 inch equals 400 feet).