HYDROLOGY OF NEW YORK 



681 



contract. The work was practically completed in 1891, when the 

 aqueduct and its appurtenances were turned over to the Depart- 

 ment of Public Works and put into service. 



The new aqueduct consists of three parts, as follows : 



1) A masonry conduit, not under pressure, from the inlet gate 

 at Croton lake to a point near Jerome park. 



2) A masonry conduit under pressure from the previous point 

 to the gate-house at 125th street and Convent avenue. This por- 

 tion of the aqueduct forms a long, inverted syphon. 



3) A pipe-line from 125th street gatehouse to the gate-house 

 at Central Park receiving reservoir. Eight lines of 18-inch cast- 

 iron main are laid from 135th street to 125th street. Four lines 

 are continued to the Central Park reservoir, while the other four 

 are connected to the distribution system at various points in 

 the city. 



In the meantime a number of reservoirs, some of which had 

 been started by the Department of Public Works, were constructed 

 by the Aqueduct Commission. Among these are East Branch, 

 Titicus, Caroiel and Amawalk reservoirs, all on the Croton river. 



Information in regard to storage on the Croton river is very ex- 

 tensive, and the foregoing is a skeleton merely. 



Brooklyn Borough Water Supply 



Under date of January 24, 1890, I. M. De Varona, Engineer of 

 the water supply of Brooklyn, transmitted to the Commissioner 

 of Public Works an extensive report, including a detailed state- 

 ment of the works from which Brooklyn derives its water supply. 

 The text of this report comprises the following heads: Intro- 

 ductory, Descriptive, Historical, Financial, Laws, Biographical, 

 Regulations, Bibliography, Tables and Plates. 



The Descriptive section includes an account of the five different 

 systems in use for the supply of Brooklyn. The most important 

 of these is the Rklgewood system, originally intended to provide 

 for the entire city. The four other plants are the Long Island, 

 the Flatbush, the New Utrecht and Gravesend systems. These 

 four plants were originally installed to supply the territory they 

 serve before it became a part of Brooklyn. They also derive their 

 supply from open and driven' wells, and for convenience are re- 

 ferred to first. 



