Chicago, Ill. Reports on preliminary examination and survey of harbors and rivers at or near Chicago, Ill., including Chicago Harbor, Chicago River, Calumet Harbor, Grand Calumet and Little Calumet rivers, Ill. and Ind., Lake Calumet and necessary connection with Calumet River, and lake shore from mouth of Chicago River to Gary, Ind., for purpose of reporting plan for complete, systematic, and broad improvement of harbor facilities for Chicago and adjacent territory.

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