1938 SLA (Salt Lake Aqueduct)
The 1938 SLA (Salt Lake Aqueduct, Utah) black and white (panchromatic) aerial project was acquired by the U.S. Bureau of Reclamation (USBR) at a scale of 1:20,000.
Project Year 
1935-1939 
1940-1949 
1950-1959 
1960-1969 
1970-1979 
1980-1989 
1990-1999 
2000-2009 
2010-2024