... engines do very little work. The capacity of both tunnels at this stage should, in their present probable condition, be about 115,000,000 gallons per twenty-four hours. "The Chicago avenue pumps take up about 70,000,000 gallons, leaving 45,000,000...
Report on the water supply system of Chicago: its past, present and future - Page 20
by John Ernst Ericson - 1905 - 68 pages
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