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

  	P12-200-2929NA Klamath Project - Oregon-California. View of small crawler tractor being used to backfill the open trench. Excavated earth, windrowed along the open trench, provides the material needed ...
  	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 P12-200-2929NA Klamath Project - Oregon-California. View of small crawler tractor being used to backfill the open trench. Excavated earth, windrowed along the open trench, provides the material needed for the backfill. The backfill is not compacted after it is pushed into the trench. However, it is mounded over the trench to provide for future settlement; November 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 P12-200-2929NA Klamath Project - Oregon-California. View of small crawler tractor being used to backfill the open trench. Excavated earth, windrowed along the open trench, provides the material needed for the backfill. The backfill is not compacted after it is pushed into the trench. However, it is mounded over the trench to provide for future settlement; November 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

  	P12-200-2936NA Klamath Project - Oregon-California. View of a workman using a whacker to obtain the required compaction at the outlet end of the drain line; December 1972; Bureau of Reclamation photo ...
  	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 P12-200-2936NA Klamath Project - Oregon-California. View of a workman using a whacker to obtain the required compaction at the outlet end of the drain line; 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 P12-200-2936NA Klamath Project - Oregon-California. View of a workman using a whacker to obtain the required compaction at the outlet end of the drain line; 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