California. New Almaden quadrangle (15'), 1919 (1928)

R.B. Marshall, Chief Geographer. Geo. R. Davis, Geographer in charge. Topography by R.T. Evans, C.A. Ecklund, Olinus Smith and A.J. Ogle. Control by C.F. Urquhart and B.A. Jenkins. Surveyed in 1915-1916. Polyconic projection, North American datum. [Vertical] datum is mean sea level