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The long term average flow rate of the Niagara River is 205,000 cubic feet per second. Thus there was a net addition from the Lake Erie area of about 15,000 cubic feet per second. Note: the Detroit River is the summation of Lake Michigan, Lake Superior, Lake Huron, and Lake St Clair.
At Quebec City this has increased to about 434,000 cubic feet per second if my calculations are correct.
The Hudson River rate is about 32,000 cubic feet per second at times. See
http://www.appliedcoastal.com/pdf/01-13_rpt.pdf
Ham, have we given you enough reading for now?
In 1951 the USS Wisconsin was anchored in the Hudson River in the morning with low steam pressure and the anchor slipped. The ship moved on to the New Jersey mud banks. A very large number of tug boats from New York harbor were used to restrain the Wisconsin from going further on the mud. The Wisconsin horsepower rating was about 200,000 and I believe tugs are about 5000 HP.
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