Actions for Obstructions to navigation in the Columbia River. Letter from the Secretary of War, transmitting a letter from the Chief of Engineers submitting a copy of the report of the Board of Engineers appointed by the President, under authority contained in the river and harbor Act of July 13, 1892, as to obstructions to navigation in the Columbia River. September 9, 1893. -- Referred to the Committee on Rivers and Harbors and ordered to be printed

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