Site preparation-- breaking rock, Site preparation-- breaking rock, 1937-4 Site preparation-- breaking rock, 1938-07-26 Site preparation-- dump truck, Site preparation-- early construction, Site preparation-- excavation, 1935-08-21 Site preparation-- excavation operations, 1934-06-29 Site preparation-- excavation operations, 1936-11-01 Site preparation-- future site of Grand Coulee, 1934-7 Site preparation-- future site of Grand Coulee, 1905-04-17 Site preparation-- future site of Grand Coulee, 1934-04-03 Site preparation-- general view of rock cleanup, 1937-04-29 Site preparation-- grouting operations, 1939-06-06 Site preparation-- men install piping, 1936-11-09 Site preparation-- panoramic view of Grand Coulee site, 1935-08-02 Site preparation-- panoramic view of Grand Coulee site, 1935-08-02 Site preparation-- removing surface rock, 1937-4 Site preparation-- structures along bank, 1934-04-02 Site preparation--Caterpillar excavation, Site preparation--excavating the bank, 1934-03-02 Site preparation--excavating the diversion channel, 1936-8 Site preparation--excavation, 1905-04-17 Site preparation--machinery used for excavation, 1936-07-30 Site preparation--removal of overburden, 1933-12-14 Spillway and drum gate construction--aerial veiw of Grand Coulee construction, 1940-06-03

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