WILLAMETTE RIVER BASIN, OREGON, BANK PROTECTION AND CHANNEL IMPROVEMENT; DESIGN MEMORANDUM, HARPER BEND UPSTREAM EXTENSION, GAVETTE, FOSTER, MEYERS-EYLER DOWNSTREAM EXTENSION, ARMITAGE UPSTREAM EXTENSION, LEABURG DAM, HAYES, BARCLAY, MCCORMICK LOCATIONS, AND LOCATION "A" DOWNSTREAM EXTENSION, WILLAMETTE, MCKENZIE AND SANTIAM RIVERS, FISCAL YEARS 1958 AND 1959


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