Report on the water supply system of Chicago: its past, present and future (Google eBook)

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Cameron, Amberg & Co., Printers, 1905 - Nature - 68 pages
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Page 5 - SIR: In compliance with your request, I have the honor to submit herewith a report of the condition of the public schools of this Territory at this date.
Page 58 - ... apartment houses Moderate class apartment houses. Poorest class apartment houses. Average of all apartment houses supplied by meter. Boarding houses. Average of all dwellings supplied by meter. All houses supplied with modern plumbing. These families have but one faucet each. These families have but one faucet each.
Page 13 - June 29, by vote of the people, the city of Lake View and the towns of Hyde Park, Lake, Jefferson and Cicero, aggregating 128.24 miles of territory and about 220,000 people, were annexed...
Page 60 - ... given as an illustration of the effect of reducing waste and leakage. "Again, if one-half of the water pumped is wasted or leaks away, the pumps have to force into the mains twice as much water as is otherwise necessary, and this means a velocity in the pipes of at least twice the necessary velocity. Since the friction increases as the square of the velocity, the conclusion to be drawn is that if the pumpage can be decreased 50 per cent, the pressure can be increased four times without any additional...
Page 34 - Total cost of improvements authorized and under way ................ ...... $3.390,000 variations may increase the consumption 150 per cent or more over and above the average yearly, irrespective of the large increase in pumpage required in case of a great fire, it is readily seen how necessary it is to provide for the additional supply without delay. The constantly growing per capita consumption under present unrestricted conditions is best illustrated by the accompanying diagram (Plate A).
Page 33 - Harrison crib, the reconstruction of the cross-town tunnels so they will be entirely on city property, and new boiler plants. The present maximum pumping capacity of all the stations is about 495,000,000 gallons per twenty-four hours. Allowing 25 per cent of this for reserve machinery and for slip in the pumps, there should be a constant available supply of about 370,000,000 gallons per day. Assuming the present population at 2,000,000 people, there would be a per capita daily supply of about 186...
Page 61 - ... the great waste which was believed to exist. The pumpage at that time was 6,000,000 gallons per day and the engines were kept running to their utmost capacity. Even under these circumstances the fire engines had to take water under suction. Such a thing as fighting a fire with the hydrant pressure was unknown. After the meters were put in the pumpage immediately fell from 6,000,000 gallons to 1,250,000 gallons per day and the pressure increased from 20 pounds per equare inch to 60 and 80 pounds.
Page 20 - ... 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 gallons for the West Side. The capacity of the last-named plant is 60,000,000 gallons per twenty-four hours.
Page 29 - ... the place of the old pumps installed in 1853, 1857, 1867 and 1872, respectively. The contract was let late in the same year. One of these engines has been installed, and the second one will be in place before the end of this year. As the per capita consumption...
Page 19 - SG Artingstall, Esq., City Engineer: "Dear Sir I beg leave to submit in the following a report on the necessity of changes and additions in the water supply system. "First The necessity of extending the seven-foot tunnel terminating at the crib located at the northwesterly end of...

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