Annual Report of the Commissioner to Mayor Low Dealing with the Various Boroughs.

Commissioner R. G. Monroe has published his report of the department of water supply of New York city for 1901, confining it to information and statistics presented in the reports of the deputy commissioners of the several boroughs and the heads of bureaus, with compilations from other records. The following is a condensation of its contents:


During 1901 the rainfall in the Croton watershed, as recorded by the rain-gauges kept at Boyd’s Corner reservoir, Middle Branch reservoir, and the Croton dam was 62.09 incites—about ten times greater than the average for forty-eight preceding years, but, owing to unequal distribution over the several seasons (first quarter, 9.37 inches; second quarter, 16.93 inches; third quarter, 21.73 inches; fourth quarter, 14.06 inches), there were 157 days in the first four and last two months of the year when the natural flow of the river at the Croton dam had to be supplemented by drafts on the reserve supply in the storage reservoirs, amounting in the aggregate to 16,430,000.000 gallons. At the close of the year all the reservoirs had been refilled. The old Croton aqueduct is still shut off at a point a short distance above the site of the new Jerome Park reservoir, awaiting the completion of that reservoir under the direction of the aqueduct commissioners. It has. however, furnished the water supply to Sing Sing prison, and. since June to. 1901, from 7,000,000 to 10,000.000 gallons per day through the temporary pumping plant near Gun Hill road, for auxiliary supply in the borough of the Bronx. Including this, the daily supply from the Croton watershed for the past year has averaged 264.000.000 gallons.


The rainfall for the year in the Bronx river watershed. recorded Ic a rain-gauge at the Kensico reservoir, was 52.52 inches—9.47 inches less than in the Croton watershed. At the close of 1900 the Kensico, Rye ponds, and Byram reservoirs were practically deoleted, and two-thirds of the supply in the receiving and distributing reservoir at Williamsbridge had been drawn off. For the first three months of 1901 the supply through the Bronx conduit averaged only 12.500,000 gallons per day. instead of the normal supply of 20,000,000 gallons. Slight relief was afforded through two small pumping plants which had been installed in December. 1900. to pumn about 2,200.000 gallons per day from the Croton aqueduct. In January, 1901, authority and funds were obtained for the. installation and operation of a larger temporary plant, to pump from 5,000.000 to 10,000,000 gallons daily. Pumping began on June 10, thus furnishing the first effective relief from the distressing and dangerous deficiency of water supply in the borough of the Bronx. In the latter part of summer and in the fall the supply from the Bronx and Byram was increased to 20.000,000 gallons per day. until, on November 27, the drafts on the Byram river, about 7,000.000 gallons per day. had to be discontinued, in obedience to an injunction issued by the United States Circuit court.


In extending and improving the water service there were laid during the year: Thirteen thousand linear feet of forty-eight-inch mains; 3,682 linear feet of thirtv-six-inch mains; 8.517 linear feet of twenty-inch mains; 2.100 linear feet of sixteen-inch mains: 28,651 linear feet of twelve-inch mains: 66,879 linear feet of six-inch mains—total, 122,829 linear feet of mains, or 23.26 miles. In connection with these new mains, eighty additional stop-cocks and 215 fire hydrants were placed and set. On December 31, 1901. the distributing system included 826.28 miles of water mains, with 9,420 stop-cocks and 12.044 fire hydrants.

The new high service pumping station in course of erection at Terome avenue and Two Hundred and Fourth street, and the several lines of forty-eightinch water mains, which are also under way, and will connect the station with the distributing mains in the borough of the Bronx, will form a most important part of the system. Contracts for the foundations. for the engine, boiler, and coal house, for a tank and standpipe, and for engines and boilers were let in the summer and fall of 1901: but the work had to await the completion of a sewer, under the direction of the aqueduct commissioners, to drain the site of the Jerome Park reservoir, so that nothing was donelast yearexcept to begin the layingof the foundations. One of the lines of forty-eight-inch mains has been under contract since December. 1000. and will be completed and connected with the Croton aqueduct by September next, in advance of the completion of the high-service station with which it will ultimately be connected. It will convey an additional supply of about 20,000.000 gallons per day into the distributing mains in several parts of the borough. The capacity of the tnree high-service pumping stations in Manhattan was at times overtaxed by excessive consumntion and waste of water in very warm and very cold weather. A contract was made for two 15.000.000-gallon engines for the Washington bridge station, but the work has been much delayed by strikes at the machine shops. One of the engines will probably be installed by September, and the other by December next.


The rainfall recorded by the rain-gauge at the Hempstead reservoir, which is about the centre of the Long Island watershed, was 44-73 inches. In January and February it was only 2.98 inches, compelling the complete exhaustion of the reserve supply in the Hempstead and Ridgewood, Mount Prospect, and New Lots reservoirs, and the temporary closing of the forty-eight-inch main in East New York and Hamilton avenue. The loss of supply through the main was partially made good by increased pumping from the wells at the Gravesend and New Utrecht pumping stations, and directing a large part of this supply into the mains in southwest Brooklyn, and by obtaining a temporary small supply from the Blythebournc Water company at $40 per million gallons. By March 20 the rainfall had sufficiently increased to permit of the resumption of service through the forty-eight-inch main. The following table, giving the average daily supply and comsumption of water for each quarter and the reserve supply in the reservoirs at the close of each quarter, illustrates the effects of variations in rain fall in respect to the supply from the Long Island watershed (Ridgewood system) :

The contract of March 7, 1901. for two new boilers for the Mount Prospect station was only partially completed at the end of the year, and a broken pump caused operations to he suspended for several months. The deficiency of supply was partially made up by increased pumping for the tower service and larger draft in the Ridgewood service. At the Milburn station the engines had always been under severe strain to pump the average daily supply of 40,000.000 gallons from the easterly watershed, until the connections for one of the double line of fortyeight-inch pipes between the engine house and the efflux chamber of the Milburn reservoir were completed. which occurred on December 18. Since that time the engines have proved capable of pumping 55.ooo.oco gallons per dav without strain.

Mechanical filter plants, to cost $164,250, with a capacity of 8.000.000 gallons per day. to purify the water supply from Baisleys and Springfield, which could not he used for vears because of sewage pollution. were contracted for. The plant at Springfield was nearly complete at the end of the year, and two-thirds of that at Baisleys had been finished.


Owing to delay on the part of the municipal assembly, the bond issue of $250,000 to extend the water service into new streets and districts will not be available till June 25, between which date and December 31 10,135 feet of twelve-inch main. 20.658 of eight-inch, and 17,553 of six-inch, with 109 stopcocks and 115 hydrants, were laid.


Many of the driven wells were “pulled up,” cleaned, and re-driven during the year. For seven months the pumping from those east of Milburn was suspended, as the gravity supply from the streams and ponds of the easterly watershed was more than equal to the conduit capacity, the contract time for the completion of which was extended for three months from December 31. On December 15 the double pipe line between Milburn engine house and the efflux chamber of the reservoir was completed, and the connections at both ends were made. The operation of this section of the new conduit increases hy several million gallons the daily supply from the easterly watershed into the conduit west of Milburn, between which and Spring creek two-fifths of the pipe had been laid by the close of the year. The reservoir is to be completely relieved.


The State legislature having failed to authorise the construction of additional wells and the improvement and extension of the pumping plants in the First and Third wards, the $100,000 appropriation could not be made use of, while, for the same reason, an appropriation of $75,000 and $70,000 could he used only in small parts for laying additional mains and improving the water service. One contract for 2.200 feet of twelve-inch main and 18,000 of sixinch, with seventy-five stop-cocks and seventy hydrants, was about half completed at the end of December, 1901. Much more must be done to the pumping plants in Long Island City to put them in decent condition. The following are the average daily quantities of water pumped at the six stations, and the water furnished under the contract with the Citizens’ Water Supply company in 1900 and 1901, for distribution through the city’s mains:

The average daily supply of water pumped at the small pumping station at Tottenville, owned by the city, and distributed through six and one-tenth miles of mains, was 103,000 gallons for the first quarter, 107,000 gallons for the second, 128,000 gal lons for the third, and 116,000 gallons for the fourth —average for the year, 113,300 gallons; increase over daily supply for 1000, 24,000 gallons. Two additional ten-inch wells out of four, with pumps and connections to the reservoir at the station, have been completed, and $10,000 will be spent on laying ad ditinnal water mains from the Tottenville station, including 8,000 linear feet of six-inch main, with ten stop-cocks and twenty hvdrants. The existing contracts with the Staten Island Water Supply com pan” and the Crystal Water company for sunnlyine with water 1,006 hydrants for fire and drinking “imposes expire this vear: they may bo renewed the city acquire the comnanies’ plants and property.


The total revenue for the year was $7.887733 84 ; total expenditures for the “car, $3,810,865.82,

No posts to display