HYDROLOGY OF NEW YORK 



691 



the pumping on the lowering of the water. To determine this 

 point fully, Mr De Varona states, would require a more prolonged 

 series of observations than it was possible to make in 1895. 



Another test was made at Jameco from December 9 to 20, 1895, 

 inclusive. Between this date and the end of the previous tests an 

 additional well had been sunk at Jameco to the depth of 160 feet. 

 The average daily yield shown during the second test was, approxi- 

 mately, 1,000.000 gallons for a single well, with a proportionate 

 increase for each well connected, the yield for five wells being, 

 approximately, 5,000,000 gallons in 21 hours. The lowering or 

 the water during those tests amounted to slightly over 14 feet at 

 Jameco while pumping the 5,000,000 gallons daily from the five 

 wells. The total amount of water pumped during the test was 

 6.1,239,555 gallons. The greatest lowering of the underground 

 water level occurred at test well No. 8, where it amounted to 

 15.23 feet. At that time, when the water at Jameco was at its 

 lowest level, the fall between test well No. 8 and test well No. 11 

 was 9.9 feet. The normal water level was not restored until 

 twelve days after the tests had ceased. 



The results obtained early in 1895 from the test made at Jameco 

 of supplies from deep wells seemed to warrant further investiga- 

 tions as to the possibility of water from deep wells, and the report 

 states that they have been carried on during the year. A series 

 of test wells were driven, extending from the foot of the hill at 

 Ridgewood reservoir to Forest stream pumping station, each well 

 being carried to a depth sufficient to determine the possibility of 

 obtaining a deep supply from that point. The number of those 

 wells sunk during that year was twelve, and the records of the 

 strata passed, through are given in Bulletin No. 138, referred to 

 in the footnote. 1 



Returning to table No. 88, it may be stated that the tributary 

 catchment area in 1875 was 52.3 square miles. The catchment 

 area remained at this figure until January, 1881, in which month, 

 by the bringing of the Springfield pumping station into use, it was 

 increased to 59.4 square miles. In the water year of 1875, with 

 a total rainfall of 41.6 inches, the water utilized amounted to 



x For the particulars of the geology of several of the Brooklyn Water 

 Works wells, of which tests were made in 1895, see Artesian-Well Prospects 

 in the Atlantic Coastal Plain Pvegion, by N. H. Darton : Bull. U. S. Gteol. 

 Survey No. 138, 1896, p. 23-37 



