HYDROLOGY OF NEW YORK 



711 



ceding estimates of cost would be modified to the extent of sub- 

 stituting the expenditures necessary to secure the Rondout 

 water for those required to secure the Jansen kill water. The 

 commission believes that this procedure will be found to be 

 preferable ; but the impossibility of completing the Rondout sur- 

 veys does not permit accurate estimates to be made for securing 

 the Rondout water. 



In regard to a supply for the Boroughs of Brooklyn, Queens 

 and Richmond, the abstract of the final report of the commis- 

 sion states as follows: 



For Brooklyn and Queens, an immediate development of the 

 ground-water sources of Queens and Nassau counties is recom- 

 mended, and that all surface supplies be filtered; also that ulti- 

 mately these Long Island sources be supplemented by a branch 

 conduit from the proposed 500,000, 000-gallon aqueduct from the 

 north of Manhattan. 



For Richmond, the commission has approved of a ten-year 

 contract with a private company for the immediate introduction 

 of filtered water from New Jersey. 



Queens, the commission says, already urgently needs more 

 water and the Borough of Brooklyn has also reached that point 

 where it must have additional water of good quality. It has 

 already begun to filter its present surface supplies, which are 

 more or less polluted by the increasing population of the south- 

 ern portion of Nassau county. 



The following are the catchment areas of the several reservoirs 

 proposed for construction by the commission in their report 



of 1903 : 



Fiskkill creek : Above Stormville dam 

 Above Billings dam 



SI 



Wappinger creek : Above Hibernia dam 

 Above Clinton Hollow dam 



00 

 2G 



Roeliff Jansen kill : Above Silvernails dam 



Esopus creek : Above Ashokan dam 



Rondout creek : Above dam 



116 

 149 

 255 

 131 



Grand total 



732 



