Riverbanks and slope protection--anchored caisson, 1949-03-24 Riverbanks and slope protection--armor rock along the bank, 1949-04-26 Riverbanks and slope protection--armor rock along the riverbank, 1949-04-26 Riverbanks and slope protection--ferry used to transport riprap and armor rock, 1950-09-12 Riverbanks and slope protection--floating caisson exits drydock, 1949-08-24 Riverbanks and slope protection--initial run of the floating caisson, 1949-03-23 Riverbanks and slope protection--interior of caisson drydock, 1944-11-29 Riverbanks and slope protection--man stands next to armor rock, 1949-04-26 Riverbanks and slope protection--numbered rocks, 1948-03-05 Riverbanks and slope protection--palcing an armor rock on the bank, 1949-04-26 Riverbanks and slope protection--recently placed riprap, 1949-05-26 Riverbanks and slope protection--submerging the floating caisson, 1949-03-24

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