CHICAGO WATER WORKS.

CHICAGO WATER WORKS.

SUPPLIES at Chicago prior to 1854 were furnished by the Chicago Hydraulic Company, a private corporation, and since 1854 from the city works finished that year. The first works consisted of an eighteen-inch intake, extending from a crib in the lake 700 feet to a pump well fifteen feet deep, from which the pumps forced the water through several miles of small wood pipe. In 1851 the Chicago City Hydraulic company was incorporated and completed works in 1854. In 1861 the works were placed under the control of a board of public works. March 4 of that year the construction of the first lake tunnel was begun and was finished three years later. The second was built from 1872 to 1874 and a third has been constructed since then. Beside there are two land tunnels. Tables elsewhere give the capacity of these tunnels in detail.

Up to May, 1861, water was taken from the lake to a pump well, whence it was lifted to a stand pipe 136 feet high. For the first four months the works were finished no water was furnished Sundays and the pumps were run only nine hours a day. All through the years previous to 1861 additions and changes were made and a reasonable service was given. Prior to 1860 the turbidity of the water caused annoyance, resulting in the decision to build the first tunnel.

In the present system water is taken from the lake by pumping through tunnels, of which there are nearly twenty miles. There is adequate pumping capacity, stand pipes and all other appurtenances for furnishing a sufficient supply, Important additions and improvements were completed last year and others equally important are in pro. cess of construction now. With a city growing as rapidly as Chicago, improvements and additions must be constant or shortage results.

The following tables give the names and location of Chicago’s intake tunnels, the capacity and daily consumption per capita for a series of years beginning witli 1870. The total pumpage in 1894 was 87,080,267,849 gallons; daily average, 288,521,280 gallons. There are 1,556 miles of cast iron water pipes laid, varying in size from four to thirtv-six inches.

CAPACITY OF TUNNELS.

WORTHINGTON—CHICAGO TYPE.

DAILY CONSUMPTION PKR CAPITA.

THE HOLLY HIGH DUTY HORIZONTAL COMPOUND PUMPING ENGINE—STEAM END.

LAKE TUNNELS.

The engines vary at the different pumping stations, but include one or moru of all the important makes. The tables given herewith an from the description of machinery prepared by Samuel G. Artingstall, city engineer.

LAKE VIEW PUMPING WORKS.

CENTRAL PUMPING WORKS.

The following table .shows the number and make of meters in use in Chicago the middle of last month.

METERS IN USE APRIL 15TH, 1895.

Hydraulic elevators in use Dec. 31st, 1894—280; amount collected for water measured by meter 1894—$1,012,396.56.

THE HOLLY HIGH DUTY HORIZONTAL COMPOUND PUMPING ENGINE—PUMP END.

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