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Trenches
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11. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2921NA Klamath Project - Oregon-California. Side view of trenching equipment in operation. Note how the plastic drainage tubing is stretched out in advance of the trenching machine; November ...Citation -
12. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2932NA Klamath Project - Oregon-California. View of open trench before it was backfilled. The drainage tubing and cinder envelope are already in place; December 1972; Bureau of Reclamation ...Citation -
13. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2938NA Klamath Project - Oregon-California. View of pipe laying and trenching equipment taken from down in the trench; December 1972; Bureau of Reclamation photo by D. W. SteinCitation