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11. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2916NA Klamath Project - Oregon-California. View of trenching equipment in operation; December 1972; Bureau of Reclamation photo by D. W. SteinCitation -
12. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2923NA Klamath Project - Oregon-California. View of trenching machine starting to excavate a cutoff trench at the outlet end of a closed drain line; November 1972; Bureau of Reclamation photo ...Citation -
13. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2924NA Klamath Project - Oregon-California. View of trenching machine digging a cutoff wall; November 1972; Bureau of Reclamation photo by D. W. SteinCitation -
14. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2925NA Klamath Project - Oregon-California. Hopper and digging chain are being lowered to grade at right angles to an open collector drain prior to the start of a new closed drain line; November ...Citation -
15. [Image] Closed Drain Construction - Tule Lake Sump 3 - Specs. No. 200C-842, Patterson Constr. Co., Contractor
P12-200-2926NA Klamath Project - Oregon-California. View of hopper unit and digging chain in position to start excavating a new closed drain line; November 1972; Bureau of Reclamation photo by D. W. ...Citation -
16. [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. SteinCitation -
17. [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 -
18. [Image] Sump 3, 101-C-6 Drain
KP-2549-R2-Klamath Project - Sump 3, 101-C-6 Drain. View showing excavation of top two feet with carryalls near station 66+00 by subcontractor D.Potter & Co. Carryalls are Hancock 7E2 selfloading, powered ...Citation -
19. [Image] Closed Drain Construction, Tule Lake, Sump 3 Specs. 200C-910 - Patterson Constr. Co., Contractor
CN-12-201-500NA Klamath Project - Oregon-California. View showing #12 Motor Patrol shaping and completing open drain that was filled; November 1974; USBR photo by D. W. SteinCitation -
20. [Image] Closed Drain Construction, Tule Lake, Sump 3 Specs. 200C-910 - Patterson Constr. Co., Contractor
CN-12-201-501NA Klamath Project - Oregon-California. View showing #12 Motor Patrol shaping and completing open drain that was filled.Citation