Construction of pipelines, syphons and tunnels--man looks at siphon

Columbia Basin Project, Irrigation Division, Soap Lake Siphon, Specifications No. 2411, Winston Brothers and Utah Construction Co., Contractors. This photograph, looking upstream, shows the Schedule II siphon concrete placed to date. Dark concrete in foreground is section 50a. The 54-B-3 C.Y. dragline is seen in the upper right excavating common and stripping rock for the drillers, Station 437+. H.E. Foss, photographe