Officials in the field conducting a land survey for the Hoover Dam project. From left to right, the men include Six Companies Foreman H.S. McDowell; Six Companies Foreman C.A. Williams, U.S. Reclamation Service Engineer R.C. Thaxton; Superintendent of Construction for the Six Companies Frank T. Crowe; and Office of Engineer and U.S. Reclamation Service John C. Page.