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• 1. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor

  	P12-200-2907NA Klamath Project - Oregon-California. View of pipe laying operation. Note relationship of trenching machine to dump truck; December 1972; Bureau of Reclamation photo by D. W. Stein
  	Citation × Citation Citation Abstract Copy Title: Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1972, 2008, 2006 P12-200-2907NA Klamath Project - Oregon-California. View of pipe laying operation. Note relationship of trenching machine to dump truck; December 1972; Bureau of Reclamation photo by D. W. Stein Title: Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1972, 2008, 2006 P12-200-2907NA Klamath Project - Oregon-California. View of pipe laying operation. Note relationship of trenching machine to dump truck; December 1972; Bureau of Reclamation photo by D. W. Stein Close

• 2. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor

  	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
  	Citation × Citation Citation Abstract Copy Title: Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1972, 2008, 2006 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 Title: Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1972, 2008, 2006 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 Close

• 3. [Image] Closed Drain Construction, Tule Lake Area, Sump 3 - Specs. 200C-910 - Patterson Construction Company, Contractor

  	P-12-200-3062NA Klamath Project - Oregon-California. View of Hoes Trencher with hopper, placing 4" plastic pipe on Line #11-1. Cinders are dumped onto conveyor where they are carried to hopper and placed ...
  	Citation × Citation Citation Abstract Copy Title: Closed Drain Construction, Tule Lake Area, Sump 3 - Specs. 200C-910 - Patterson Construction Company, Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1974, 2008, 2006 P-12-200-3062NA Klamath Project - Oregon-California. View of Hoes Trencher with hopper, placing 4" plastic pipe on Line #11-1. Cinders are dumped onto conveyor where they are carried to hopper and placed to form cinder envelope around the pipe; December 1974; USBR photo by D. W. Stein Title: Closed Drain Construction, Tule Lake Area, Sump 3 - Specs. 200C-910 - Patterson Construction Company, Contractor Author: United States. Bureau of Reclamation, Stein, D.W. Year: 1974, 2008, 2006 P-12-200-3062NA Klamath Project - Oregon-California. View of Hoes Trencher with hopper, placing 4" plastic pipe on Line #11-1. Cinders are dumped onto conveyor where they are carried to hopper and placed to form cinder envelope around the pipe; December 1974; USBR photo by D. W. Stein Close