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1971. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
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; Bureau of Reclamation photo by D. ...Citation -
1972. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2905NA Klamath Project - Oregon-California. View of pipe laying operation; December 1972; Bureau of Reclamation photo by D. W. SteinCitation -
1973. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
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. SteinCitation -
1974. [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. SteinCitation -
1975. [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. SteinCitation -
1976. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
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 mounted on the back of the trenching ...Citation -
1977. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
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 of the proposed line. Then, the ...Citation -
1978. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2911NA Klamath Project - Oregon-California. It bacame [sic] necessary to scrape the snow away from the front of the trenching machine because of its high flotation. The maching was unable to ...Citation -
1979. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2912NA Klamath Project - Oregon-California. View of trenching machine and hopper unit being moved from a completed drain line to another field; December 1972; Bureau of Reclamation photo by ...Citation -
1980. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2913NA Klamath Project - Oregon-California. Close-up view of digging chain prior to starting a new drain line. The hopper unit and trencher were backed up to an open collector drain, lowered ...Citation