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

  	P12-200-2945NA Klamath Project - Oregon-California. Laser Beam Receiving Unit shown attached to trenching machine; 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 P12-200-2945NA Klamath Project - Oregon-California. Laser Beam Receiving Unit shown attached to trenching machine; 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 P12-200-2945NA Klamath Project - Oregon-California. Laser Beam Receiving Unit shown attached to trenching machine; 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

  	P12-200-2946NA Klamath Project - Oregon-California. View of Laser Beam Receiving Unit mounted on trencher. Note that the control panel for receiver unit is mounted to the left of controls for trencher; ...
  	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 P12-200-2946NA Klamath Project - Oregon-California. View of Laser Beam Receiving Unit mounted on trencher. Note that the control panel for receiver unit is mounted to the left of controls for trencher; 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 P12-200-2946NA Klamath Project - Oregon-California. View of Laser Beam Receiving Unit mounted on trencher. Note that the control panel for receiver unit is mounted to the left of controls for trencher; December 1972; Bureau of Reclamation photo by D. W. Stein Close

• 3. [Image] Closed Drain Construction in Tule Lake Sump 3 - Specs. No. 200C-821

  	CN-12-200-64A Klamath Project - Oregon-California. Looking west at equipment developed and used by Contractor to excavate and install plastic drainage tubing in one operation. Note that the trencher tows ...
  	Citation × Citation Citation Abstract Copy Title: Closed Drain Construction in Tule Lake Sump 3 - Specs. No. 200C-821 Author: United States. Bureau of Reclamation, Bryant, J.K. Year: 1971, 2010, 2007 CN-12-200-64A Klamath Project - Oregon-California. Looking west at equipment developed and used by Contractor to excavate and install plastic drainage tubing in one operation. Note that the trencher tows a hopper which contains and places the cinder envelope around the drainage tubing. Metal shields support the vertical walls of the open trench between the trencher and the hopper. The guide on the bottom of the hopper positions the drainage tubing as it is pulled into the trench. Contractor Don Johnson is shown operating the trenching machine; February 18, 1971; Bureau of Recl. photo by J.K. Bryant Title: Closed Drain Construction in Tule Lake Sump 3 - Specs. No. 200C-821 Author: United States. Bureau of Reclamation, Bryant, J.K. Year: 1971, 2010, 2007 CN-12-200-64A Klamath Project - Oregon-California. Looking west at equipment developed and used by Contractor to excavate and install plastic drainage tubing in one operation. Note that the trencher tows a hopper which contains and places the cinder envelope around the drainage tubing. Metal shields support the vertical walls of the open trench between the trencher and the hopper. The guide on the bottom of the hopper positions the drainage tubing as it is pulled into the trench. Contractor Don Johnson is shown operating the trenching machine; February 18, 1971; Bureau of Recl. photo by J.K. Bryant Close