﻿HYDROLOGY 
  OP 
  NEW 
  YORK 
  827 
  

  

  other 
  lock 
  on 
  the 
  canal 
  as 
  to 
  induce 
  the 
  belief 
  that 
  the 
  gates 
  were 
  

   not 
  properly 
  closed 
  at 
  the 
  time 
  of 
  measurement. 
  At 
  lock 
  No. 
  69 
  

   on 
  the 
  same 
  canal, 
  the 
  leakage 
  was 
  6.37 
  cubic 
  feet 
  per 
  second 
  

   from 
  an 
  8-foot 
  lift. 
  

  

  Mr 
  Talcott's 
  report 
  is 
  very 
  able, 
  and 
  presents 
  forcibly 
  all 
  the 
  

   data 
  at 
  hand 
  at 
  that 
  time. 
  It 
  may 
  be 
  said 
  that 
  the 
  data 
  which 
  

   he 
  gave 
  fixed 
  the 
  following 
  quantities 
  as 
  fairly 
  covering 
  the 
  

   various 
  losses 
  to 
  which 
  artificial 
  waterways 
  of 
  the 
  dimensions 
  of 
  

   the 
  original 
  canals 
  of 
  this 
  State 
  are 
  subject. 
  1 
  

  

  1) 
  Loss 
  by 
  filtration, 
  absorption 
  and 
  evaporation, 
  1.67 
  cubic 
  

   feet 
  per 
  second 
  per 
  mile. 
  With 
  retentive 
  soils 
  this 
  could 
  be 
  re- 
  

   duced 
  to 
  from 
  1.00 
  to 
  1.20 
  cubic 
  feet 
  per 
  second 
  per 
  mile. 
  Mr 
  Tal- 
  

   cott 
  fixed 
  on 
  1.10 
  cubic 
  feet 
  per 
  second 
  per 
  mile 
  for 
  the 
  Genesee 
  

   valley 
  canal, 
  which 
  was 
  largely 
  built 
  through 
  heavy 
  soils, 
  but 
  

   this 
  was 
  subsequently 
  found 
  too 
  small. 
  

  

  2) 
  Leakage 
  at 
  mechanical 
  structures; 
  for 
  locks 
  of 
  11 
  feet 
  lift, 
  

   8.33 
  cubic 
  feet 
  per 
  second; 
  for 
  leakage 
  and 
  waste 
  at 
  each 
  waste- 
  

   weir, 
  0.50 
  cubic 
  foot 
  per 
  second; 
  for 
  a 
  wooden-trunk 
  aqueduct, 
  

   an 
  amount 
  depending 
  on 
  the 
  length 
  of 
  the 
  structure, 
  but 
  as 
  an 
  

   average, 
  0.058 
  of 
  a 
  cubic 
  foot 
  per 
  second 
  for 
  each 
  linear 
  foot 
  of 
  

   trunk 
  may 
  be 
  taken. 
  

  

  In 
  response 
  to 
  a 
  resolution 
  of 
  the 
  Canal 
  Commissioners 
  of 
  

   April 
  12, 
  1841, 
  O. 
  W. 
  Childs, 
  then 
  Chief 
  Engineer 
  of 
  the 
  Erie 
  

   canal, 
  prepared 
  a 
  report 
  on 
  the 
  water 
  supply 
  of 
  the 
  western 
  

   division 
  with 
  reference 
  to 
  the 
  enlargement 
  then 
  in 
  progress. 
  2 
  

   In 
  this 
  paper 
  Mr 
  Childs 
  gives 
  the 
  results 
  of 
  measurements 
  made 
  

   by 
  himself 
  in 
  1841 
  of 
  losses 
  from 
  filtration, 
  absorption, 
  evapora- 
  

   tion, 
  and 
  leakage 
  on 
  the 
  original 
  Erie 
  canal 
  between 
  Wayneport, 
  

   in 
  Wayne 
  county, 
  and 
  Pit 
  lock,, 
  which 
  corresponded 
  to 
  lock 
  53, 
  

   near 
  Clyde, 
  of 
  the 
  present 
  canal. 
  He 
  also 
  gave 
  the 
  result 
  of 
  

   measurements 
  made 
  by 
  Alfred 
  Barrett 
  between 
  Pittsford 
  and 
  

   Lockport. 
  

  

  ^he 
  quantities 
  here 
  given 
  apply 
  to 
  canals 
  40 
  feet 
  by 
  28 
  and 
  4 
  feet 
  deep, 
  

   and 
  with 
  locks 
  90 
  feet 
  in 
  length 
  and 
  15 
  feet 
  in 
  width 
  and 
  8 
  to 
  10 
  feet 
  lift. 
  

  

  2 
  See 
  Supply 
  of 
  Water 
  Required 
  for 
  the 
  Canal 
  Between 
  Lockport 
  and 
  the 
  

   Seneca 
  River, 
  by 
  O. 
  W. 
  Childs: 
  An. 
  Rept 
  Canal 
  Com. 
  (1848). 
  Ass. 
  Doc. 
  

   No. 
  16, 
  p. 
  141-175. 
  

  

  