Abstract
In 1900, by the opening of the Chicago drainage canal, there was provided a watercourse for the disposal of sewage and for navigation from Lake Michigan by way of the Chicago River to the Illinois and Mississippi Rivers. Entailing as it did the reversal of the flow of the Chicago River, this, from the engineering standpoint, has been hailed as a great achievement. The large abstraction of water from Lake Michigan through the canal, however, had its effect in a lowering of levels in the Great Lakes and the St. Lawrence River with consequent injury to navigation. This brought about constant opposition to the canal from the Federal Government and from Canada. Thus the Sanitary District of Chicago has been involved in a host of legal difficulties and put to much expense in adjusting its plant to the demands of the United States Government. The diversion in the meantime has been a constant source of ill-feeling towards the United States on the part of Canada and at present, although under federal control, offers an obstacle to the further development of Great Lakes and St. Lawrence waterways.

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