Memorial, presented by the Trustees of the Sanitary District of Chicago to the Congress of the United States : deep waterway from Lake Michigan to the Mississippi River at St. Louis
A memorial petition printed in Chicago in 1904 by the Board of Trustees of the Sanitary District of Chicago, arguing to Congress for a deep waterway from Lake Michigan to the Mississippi at St. Louis. Halftone photographs show the drainage canal's masonry-walled channels, spillways with sheeting water, and gantry and gate machinery under wide flat skies, useful for grey-toned infrastructure and engineering imagery.
