Chicago Drainage Canal

a canal intended chiefly for carrying off the sewage of Chicago, but which may be used for commercial purposes; begun in September, 1892; completed in January, 1900. The main channel is 29 miles long, extending from Chicago to Lock port on the Illinois river, into which stream it discharges. About 9 miles of the channel is cut through solid rock, with a minimum depth of 22 feet and a width of 160 feet on the bottom in rock, which makes it the largest artificial channel in the world. The length of the waterway from the mouth of the Chicago river to its terminus 8. of Joliet is about 42 miles, The cost of the canal was estimated at about $45,000,000.