﻿HYDROLOGY 
  OP 
  NEW 
  YORK 
  683 
  

  

  The 
  Eidgewood 
  system 
  comprises 
  the 
  works 
  originally 
  built 
  

   to 
  supply 
  Brooklyn, 
  and 
  their 
  tributary 
  catchment 
  embraces 
  that 
  

   portion 
  of 
  Queens 
  county 
  bounded 
  on 
  the 
  north 
  by 
  the 
  ridge 
  

   forming 
  the 
  backbone 
  of 
  Long 
  Island; 
  on 
  the 
  east, 
  approxi- 
  

   mately 
  by 
  Suffolk 
  county; 
  on 
  the 
  south 
  by 
  the 
  salt 
  meadows 
  

   bordering 
  on 
  Hempstead 
  and 
  Jamaica 
  bays, 
  and 
  on 
  the 
  west 
  

   by 
  Kings 
  county. 
  The 
  original 
  catchment 
  area 
  is 
  66 
  square 
  

   miles, 
  while 
  the 
  new 
  catchment 
  is 
  89 
  square 
  miles. 
  

  

  The 
  sources 
  of 
  supply 
  on 
  the 
  old 
  catchment, 
  named 
  in 
  order 
  

   from 
  the 
  Eidgewood 
  engine 
  house 
  eastward, 
  are 
  as 
  follows: 
  

  

  Spring 
  creek 
  temporary 
  driven-well 
  station, 
  Spring 
  creek 
  

   driven-well 
  station, 
  Baiseley's 
  driven-well 
  station, 
  Baiseley's 
  

   pond, 
  Jameco 
  driven-well 
  station, 
  Springfield 
  pond, 
  Forest 
  

   Stream 
  driven-well 
  station, 
  Simonson's 
  pond, 
  Clear 
  Stream 
  pond, 
  

   Clear 
  Stream 
  driven-well 
  station, 
  Watt's 
  pond 
  and 
  driven-well 
  

   station, 
  Valley 
  Stream 
  pond, 
  Smith's 
  pond, 
  Pine's 
  pond, 
  Hemp- 
  

   stead 
  pond, 
  Schodack 
  brook 
  and 
  Hempstead 
  storage 
  reservoir. 
  

  

  On 
  the 
  new 
  catchment 
  the 
  sources 
  of 
  supply 
  from 
  the 
  Mill- 
  

   burn 
  engine 
  house 
  eastward 
  are: 
  

  

  Millburn 
  pond, 
  Agawam 
  driven-well 
  station, 
  East 
  Meadow 
  

   pond, 
  Merrick 
  driven-well 
  station, 
  Newbridge 
  pond, 
  Wantagh 
  

   pond 
  and 
  Massapekua 
  pond. 
  

  

  The 
  supply 
  from 
  the 
  original 
  catchment 
  is 
  collected 
  by 
  a 
  brick 
  

   conduit, 
  extending 
  from 
  Hempstead 
  pond 
  westerly 
  to 
  the 
  old 
  

   Eidgewood 
  station, 
  and 
  having 
  a 
  grade 
  of 
  about 
  six 
  inches 
  to 
  

   the 
  mile. 
  

  

  On 
  the 
  new 
  catchment 
  the 
  supply 
  is 
  collected 
  and 
  carried 
  

   by 
  gravity 
  to 
  the 
  Millburn 
  station 
  through 
  a 
  brick 
  conduit, 
  seven 
  

   and 
  one-quarter 
  miles 
  long, 
  and 
  having 
  a 
  grade 
  of 
  one 
  in 
  ten 
  

   thousand. 
  The 
  two 
  driven-well 
  stations 
  on 
  this 
  catchment 
  are 
  

   located 
  south 
  of 
  the 
  conduit 
  and 
  discharge 
  into 
  it 
  through 
  cast- 
  

   iron 
  pipes. 
  New 
  stations 
  will 
  be 
  similarly 
  connected. 
  

  

  In 
  order 
  to 
  show 
  the 
  possibilities 
  of 
  a 
  supply 
  from 
  the 
  sand 
  

   areas 
  of 
  Long 
  Island, 
  the 
  following 
  may 
  be 
  considered: 
  

  

  Water 
  yield 
  of 
  the 
  Long 
  Island 
  sand 
  areas. 
  Long 
  Island 
  is 
  

   about 
  120 
  miles 
  in 
  length, 
  with 
  a 
  varying 
  width 
  of 
  from 
  10 
  to 
  

   20 
  miles. 
  Its 
  watershed 
  line 
  consists 
  of 
  a 
  ridge 
  of 
  low 
  hills 
  

   running 
  from 
  New 
  York 
  bay 
  to 
  the 
  eastern 
  extremity 
  of 
  the 
  

  

  