BURLINCTON’S WATER SYSTEM.
BURL1NGTON, Vt., has its own water works, built in 1867-8 which supply by pumping from Lake Champlain a city population of 14,700 persons. The pumping machinery is by H. R. Worthington,and their total pumpage for the past year was 336,504,725 gallons. The average static bead against which each pump works is 289 feet, and the dynamic, 816, at a cost (figured on pumping station expenses) of $7,940.58 a year; per million gallons raised against dynamic head into reservoir, $23.59; ditto, raised 1 foot high (dynamic), $70,046; cost of pumping figured on total maintenance, $43,087.12; per million gallons raised against dynamic head into reservoir, $128.04; per million gallons raised 1 foot high (dynamic),$4,005. The gross receipts for the year were $43,007.99 and the disbursements, $41,262.12. The total costs of works to date has been $450,092.88; the bonded debt at date is $248,000; rate of interest 4 per cent. The population on lines of pipe is 15,700; that, supplied is 15,100. The total consumption in gallons for one year was 330,504,725, passed through domestic meters 03,585,928, or 18.88 per cent.; passed through manufacturing meters, 30,819,072 gallons, or 9.01 per cent.; average daily consumption. 921,980 gallons, or 00 per day for each inhabitant, 61 to each consumer, and 825 to each tup. There are in use 84.91 miles of pipe, which was extended 8,580 feet. The range of pressuro on mains at centre for day and night is 70 to 80 pounds. The number of taps in use is 2,885, average length of service, 28 feet; average cost of service, $10; number of motors and elevators in use, 20. The storage consists of earthwork reservoirs, low service-capacity 7,000,000 gallous; iron tank, high service-capacity, 169,017 gallons. The meter system is made great use of in Burlington, 200 having been added during the past year, making the whole number 1,082, of which 1,008 are domestic, and 75 manufacturing. Of the water pumped about 27.89 percent, has been used through meters, yielding about 52.01 per cent of the collections.The system, however, owing to various conditions does not work fairly toward the consumer—” fines him for practising economy”—and consequently a revised schedule of rates (looking towards a reduction) is proposed by Mr F. H. Crandall, the superintendent. Much has been done daring the past year towards perfecting the watersystem, and one, too, effectually and economically. The cost of the intake at North avenue and Shelburne street extensions has not exceeded the appropriation. It was completed during the past season, and now Burlington obtains its water from a point far removed from any possibility of contamination, to the benefit of the city’s health, as is evidenced by the report of the local physicians. The amount expended on the improvement was $47,239.46—a profitable investment for Burlington.
This intake conduit of coated cast iron pipe, 24 inches in diameter and over two miles in length, was laid in 75-foot sections connected under (not above) water by means of the Falcon ball joint (J. G. Falcon’s flexible joint of 1892, a double strength ball joint). This joint is made of a ball cast of such diameter, larger than the pipe in which it is to be used, as to admit of obtaining the desired deflection without obstructing the water way, a flanged spherical ring of about 8-8 inch greater radius than the ball and of such width that the ball cannot pass through it. which two parts are leaded together and attached to one end and a flanged bell placed so as to make a tight thimble for the ring which is attached to the other end of a section to be laid. The flanged joint made by the diver is rendered tight by means of a thin rubber tacking, and. after lying a short time in the lake water, the oxidation which takes place on the planed surface of the ring and thimble makes it doubly so. In a case like that of the Burlington intake where there is no current and high velocity to keep open and increase the size of leaks induced by changes of temperature or settlement, it may safely be expected that such small holes will be closed by oxidation. The 75-foot lengths of regular bell and spigot pipe were leaded together on shore in. the usual manner, and, before being taken out by tbe scow, a flange having been bolted to each end for that purpose, were tested by hydraulic pressure. The scow was built and work begun at the statiou in the winter and before the opening of navigation. The well was sunk, pipe laid from it through the face of the dock, and a 24-inch gate placed on the conduit in the well. By closing this gate and placing a flange on the outer end of the last section laid, it became passible at any time to test the conduit in place in the same manner in which the sections had previously been tested on shore. The outer, or intake end of the conduit is located in about thirty feet of water on Appletree reef, the end being turned up at an angle of 90 degrees and the size of the conduit increased at the bend to 30 inches. The highest point of the copper screen which caps the upright stands about 14 feet below the surface at ordinary low water, and about five feet, above the oak crib filled with stone which surrounds the upright. By closing a 24 inch gate, located just outside the crib and the one before mentioned in the well at the pumping station, the tightness of the conduit may at any time be easily tested. The tests which have been made since the completion and acceptance of the work from Joseph G. Falcon, the submarine diver, have in each case proved the conduit to be tight. The work is quite a feather in Mr. Falcon’s cap and adds another to his already long list of successes in that line.
At New Bedford, Mass., on September 2, the trial of the engine belonging to the New Bedford Veteran Fireman’s Association, in an attempt to break her record, for which a silver water set was offered by Mayor Parker and others, was made. The machine was well manned, and water was thrown 227 feet, 7 1-8 inches.