﻿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 
  gate-house 
  to 
  the 
  gate-house 
  

   at 
  Central 
  Park 
  receiving 
  reservoir. 
  Eight 
  lines 
  of 
  48-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, 
  Carmel 
  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, 
  189f>, 
  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 
  miost 
  important 
  

   of 
  these 
  is 
  the 
  Ridgewood 
  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. 
  

  

  