﻿HYDROLOGY 
  OF 
  NEW 
  YORK 
  283 
  

  

  lake 
  is 
  only 
  eight 
  miles 
  distant 
  from 
  Lake 
  Erie. 
  Its 
  elevation 
  

   above 
  tidewater 
  is 
  1,297 
  feet, 
  while 
  that 
  of 
  Lake 
  Erie 
  is 
  573 
  feet. 
  

   This 
  stream 
  flows 
  into 
  the 
  Conewango 
  creek 
  about 
  five 
  miles 
  

   north 
  of 
  the 
  Pennsylvania 
  line, 
  where 
  the 
  elevation 
  above 
  tide- 
  

   water 
  is 
  1243 
  feet. 
  The 
  fall 
  from 
  Chautauqua 
  lake 
  to 
  the 
  south- 
  

   ern 
  boundary 
  of 
  the 
  State 
  along 
  the 
  drainage 
  line 
  is 
  therefore 
  only 
  

   ■54 
  feet. 
  The 
  catchment 
  area 
  of 
  Chautauqua 
  lake 
  outlet 
  at 
  the 
  

   foot 
  of 
  Chautauqua 
  lake 
  is 
  178 
  square 
  miles 
  and 
  of 
  Chautauqua 
  

   lake 
  outlet 
  below 
  Cassadjaga 
  creek, 
  its 
  chief 
  tributary, 
  343 
  square 
  

   miles. 
  

  

  Cassadaga 
  creek. 
  This 
  creek 
  rises 
  in 
  Cassadaga 
  lake 
  at 
  an 
  eleva- 
  

   tion 
  of 
  over 
  1300 
  feet 
  above 
  tidewater, 
  and 
  flows 
  south 
  into 
  Chau- 
  

   tauqua 
  lake 
  outlet. 
  

  

  Conewango 
  creek. 
  One 
  branch 
  of 
  this 
  creek 
  rises 
  in 
  the 
  extreme 
  

   northern 
  part 
  of 
  Cattaraugus 
  county 
  and 
  the 
  other 
  in 
  the 
  northern 
  

   part 
  of 
  Chautauqua 
  county. 
  It 
  flows 
  south 
  for 
  part 
  of 
  the 
  way 
  

   near 
  the 
  county 
  line 
  between 
  these 
  two 
  counties, 
  and 
  enters 
  Penn- 
  

   sylvania 
  four 
  miles 
  west 
  of 
  the 
  west 
  line 
  of 
  Chautauqua 
  county. 
  

  

  The 
  territory 
  drained 
  by 
  Conewango 
  creek 
  is, 
  in 
  general, 
  hilly 
  

   and 
  rolling, 
  although 
  the 
  northern 
  portion 
  of 
  the 
  stream 
  has 
  

   slight 
  descent 
  with 
  swampy 
  valley. 
  From 
  Markham, 
  in 
  the 
  town 
  

   of 
  Dayton, 
  to 
  Clear 
  creek, 
  in 
  the 
  town 
  of 
  Conewango, 
  the 
  fall 
  is 
  

   only 
  25 
  feet. 
  Throughout 
  this 
  whole 
  section 
  the 
  channel 
  is 
  quite 
  

   irregular, 
  and 
  probably 
  the 
  average 
  stream 
  slope 
  does 
  not 
  exceed 
  

   one 
  foot 
  per 
  mile. 
  The 
  elevation 
  of 
  the 
  headwaters 
  is 
  1500 
  to 
  

   1600 
  feet 
  above 
  tide, 
  while 
  at 
  the 
  Pennsylvania 
  line 
  this 
  stream 
  is 
  

   about 
  1200 
  feet 
  above 
  tide. 
  The 
  catchment 
  area 
  in 
  the 
  State 
  of 
  

   ]S 
  T 
  ew 
  York 
  is 
  770 
  square 
  miles. 
  

  

  Little 
  Valley 
  creek. 
  This 
  creek 
  rises 
  in 
  the 
  central 
  part 
  of 
  Cat- 
  

   taraugus 
  county 
  and 
  flows 
  southerly 
  into 
  the 
  Allegheny 
  river 
  at 
  

   Salamanca. 
  The 
  headwaters 
  are 
  at 
  an 
  elevation 
  of 
  about 
  1700 
  

   feet 
  above 
  tide, 
  while 
  the 
  elevation 
  at 
  its 
  mouth 
  is 
  about 
  1380 
  

   feet. 
  The 
  catchment 
  area 
  is 
  42 
  square 
  miles. 
  

  

  Great 
  Valley 
  creek. 
  This 
  creek 
  rises 
  in 
  the 
  north 
  central 
  part 
  

   of 
  Chautauqua 
  county 
  and 
  flows 
  southerly 
  into 
  the 
  Allegheny 
  

   river, 
  three 
  miles 
  east 
  of 
  Salamanca. 
  The 
  countrv 
  at 
  the 
  head- 
  

  

  