Construction of pipelines, syphons and tunnels-- Bacon Siphon and Main Canal, 1949-05-04 Construction of pipelines, syphons and tunnels-- Dry Coulee Siphon, 1949-05-25 Construction of pipelines, syphons and tunnels-- crab creek siphon, 1943-08-30 Construction of pipelines, syphons and tunnels-- crab creek siphon, 1948-10-08 Construction of pipelines, syphons and tunnels-- hot water heating plant, 1950-10-02 Construction of pipelines, syphons and tunnels-- interior of the liner, 1949-06-27 Construction of pipelines, syphons and tunnels-- joining the liner sections, 1949-10-05 Construction of pipelines, syphons and tunnels-- lowering a ""can"", 1949-07-01 Construction of pipelines, syphons and tunnels-- man stands on siphon, 1950-06-09 Construction of pipelines, syphons and tunnels-- placing concrete in Dry Coulee Siphon, 1947-07-17 Construction of pipelines, syphons and tunnels-- reinforcing steel being palced, 1947-06-19 Construction of pipelines, syphons and tunnels-- sand blasting operations, 1950-06-02 Construction of pipelines, syphons and tunnels-- soap lake siphon, 1949-10-06 Construction of pipelines, syphons and tunnels--16-yard truck dumping material, 1947-07-23 Construction of pipelines, syphons and tunnels--Long Lake Headworks, 1949-12-14 Construction of pipelines, syphons and tunnels--South Coulee Dam, Main Canal Headworks, 1948-05-04 Construction of pipelines, syphons and tunnels--South Coulee Dam, Main Canal Headworks, 1948-07-15 Construction of pipelines, syphons and tunnels--abutment cut-off wall, 1947-10-01 Construction of pipelines, syphons and tunnels--blending machine operations, 1950-09-14 Construction of pipelines, syphons and tunnels--cleanup operations, 1947-07-23 Construction of pipelines, syphons and tunnels--completed concrete placing, 1949-10-17 Construction of pipelines, syphons and tunnels--completed open inlet transition, 1950-06-21 Construction of pipelines, syphons and tunnels--entrance to Bacon Tunnel, 1948-11-22 Construction of pipelines, syphons and tunnels--erecting forms, 1950-05-26 Construction of pipelines, syphons and tunnels--fabrication of half hoops, 1949-09-09 Construction of pipelines, syphons and tunnels--gate section of headworks, 1949-05-03 Construction of pipelines, syphons and tunnels--grouting foundation drainage system, 1947-07-23 Construction of pipelines, syphons and tunnels--inlet portal of Bacon Tunnel, 1947-07-23 Construction of pipelines, syphons and tunnels--inlet transition, 1949-08-04 Construction of pipelines, syphons and tunnels--interior of Bacon Tunnel, 1947-03-13 Construction of pipelines, syphons and tunnels--interior of outlet tunnel, 1947-06-09 Construction of pipelines, syphons and tunnels--lateral turnout, 1949-10-17 Construction of pipelines, syphons and tunnels--lateral turnout near completion, 1949-10-17 Construction of pipelines, syphons and tunnels--main canal headworks, 1948-09-02 Construction of pipelines, syphons and tunnels--man looks at siphon, 10/61/1949 Construction of pipelines, syphons and tunnels--man stands next to the siphon, 1950-06-09 Construction of pipelines, syphons and tunnels--man stands on Dry Coulee Siphon, 1948-09-15 Construction of pipelines, syphons and tunnels--outlet of Bacon Tunnel, 1948-11-22 Construction of pipelines, syphons and tunnels--outlet of drainage culvert, 1950-07-11 Construction of pipelines, syphons and tunnels--placing forms and reinforcing steel, 1948-03-26 Construction of pipelines, syphons and tunnels--power tamping operations, 1947-07-09 Construction of pipelines, syphons and tunnels--removing dust from coal-tar primer, 1950-07-17 Construction of pipelines, syphons and tunnels--roling the liner plate, 1949-06-27 Construction of pipelines, syphons and tunnels--stratification of material in test pit, 1948-09-02 Construction of pipelines, syphons and tunnels--stratification of material in test pit, 1948-09-02 Construction of pipelines, syphons and tunnels--view of headworks structure, 1949-06-08 Construction of pipelines, syphons and tunnels--workers inside the siphon, 1950-09-14

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