Land lines unsurveyed in parts of T. 9 S.-Rs. 6, 7, and 8 E.
Relief shown by contours and spot heights.
Forested areas overprinted in green.
1955
Topography from aerial photographs by photogrammetric methods for the Bureau of Reclamation 1948 and by the Geological Survey 1954. Aerial photographs taken 1947-1949. Field check 1955.
N4500-W11045/15.
AMS 3874 III--series V794.
1927 North American datum.