Scale 1:31,680 ; polyconic projection (W 113°44'01"--W 113°20'03"/N 43°32'01"--N 43°18'01").
Note:
Relief shown by contours and spot heights. "Contour interval 10 and 20 feet (see diagram)." Shows roads, campgrounds, tunnel, waterholes, caves and other natural features. "Surveyed in 1925 and 1930." "5000 yard grid based upon U.S. zone system, F." Includes notes and diagram showing which parts of the map are at 20-foot contour elevations and which are at 10-foot. Text about the national monument, with illustrations, on verso. Maps Library copy encapsulated.