P12-200-2906NA Klamath Project - Oregon-California. View of Hoes trencher with dump truck behind it; December 1972; Bureau of Reclamation photo by D. W. Stein

P12-200-2904NA Klamath Project - Oregon-California. Overall view of pipe laying operation. Dump truck is almost empty. Fields are covered with snow; December 1972; Bu[...]

P12-200-2917NA Klamath Project - Oregon-California. View of trenching equipment. The trencher is almost at the end of a newly installed closed drain line. Note the workm[...]

P12-200-2910NA Klamath Project - Oregon-California. View of trencher starting to excavate a drain line. The hopper and digging unit are dropped into place at the outlet[...]

P12-200-2931NA Klamath Project - Oregon-California. Rear-end view of hopper unit. Pipe is fed out of the round hole at the bottom and cinders are placed around the pipe [...]

P12-200-2908NA Klamath Project - Oregon-California. View of Hoes Gigant trencher operating in cold weather; December 1972; Bureau of Reclamation photo by D. W. Stein

P12-200-2919NA Klamath Project - Oregon-California. View of pipe trenching equipment in operation; November 1972; Bureau of Reclamation photo by D. W. Stein

P12-200-2928NA Klamath Project - Oregon-California. View of contractor's workers threading plastic drainage tubing into hopper unit; November 1972; Bureau of Reclamati[...]

P12-200-2909NA Klamath Project - Oregon-California. View of contractor's equipment. Cinders are fed into conveyor belt from dump truck and then into the hopper unit mou[...]

P12-200-2907NA Klamath Project - Oregon-California. View of pipe laying operation. Note relationship of trenching machine to dump truck; December 1972; Bureau of Recl[...]