﻿REPORT 
  OF 
  THE 
  DIRECTOR 
  rl47 
  

  

  Fig. 
  6 
  

  

  Laying 
  off 
  vertically 
  the 
  30 
  feet 
  elevation 
  of 
  Six 
  Mile 
  creek 
  and 
  the 
  

   60 
  feet 
  depression 
  of 
  the 
  mouth 
  of 
  Payne's 
  creek, 
  a 
  horizontal 
  line 
  rep- 
  

   resenting 
  the 
  lake 
  level, 
  26 
  miles 
  long 
  (the 
  distance 
  between 
  these 
  

   two 
  creeks) 
  and 
  connecting 
  the 
  points 
  so 
  determined 
  by 
  a 
  straight 
  

   line 
  to 
  represent 
  the 
  slope 
  of 
  the 
  preglacial 
  main 
  valley, 
  which 
  may 
  

   well 
  be 
  considered 
  a 
  uniform 
  grade 
  along 
  this 
  part 
  of 
  its 
  course 
  — 
  we 
  

   find 
  that 
  this 
  line 
  cuts 
  the 
  lake 
  level 
  eight 
  miles 
  from 
  Six 
  Mile 
  

   creek 
  — 
  just 
  the 
  distance 
  between 
  that 
  point 
  and 
  Salmon 
  creek, 
  

   the 
  mouth 
  of 
  which 
  we 
  found 
  to 
  be 
  so 
  nearly 
  on 
  the 
  lake 
  level. 
  

  

  That 
  this 
  stream 
  flowed 
  northward 
  is 
  equally 
  obvious. 
  

  

  At 
  what 
  elevation 
  compared 
  to 
  the 
  present 
  lake 
  surface 
  did 
  this 
  

   stream 
  flow?* 
  

  

  I 
  think 
  it 
  is 
  safe 
  to 
  say 
  that 
  the 
  three 
  tributaries 
  studied 
  had 
  

   reached 
  the 
  same 
  state 
  of 
  maturity 
  — 
  if 
  they 
  had 
  not 
  actually 
  estab- 
  

   lished 
  the 
  proflle 
  of 
  equilibrium 
  near 
  their 
  mouths. 
  

  

  If 
  the 
  bottom 
  of 
  the 
  preglacial 
  Payne's 
  creek 
  is 
  55 
  or 
  60 
  feet 
  

   below 
  the 
  surface 
  of 
  the 
  lake 
  at 
  its 
  edge, 
  and 
  if 
  the 
  foot 
  of 
  the 
  first 
  

   falls 
  is 
  45 
  feet 
  above 
  the 
  lake, 
  then 
  the 
  total 
  fall 
  of 
  the 
  preglacial 
  

   stream 
  in 
  this 
  distance 
  of 
  about 
  a 
  mile 
  was 
  about 
  100 
  feet. 
  The 
  

   possibility 
  of 
  the 
  stream 
  being 
  locally 
  diverted 
  from 
  its 
  old 
  channel 
  

   at 
  the 
  falls 
  is 
  very 
  remote, 
  for 
  the 
  high 
  rock 
  walls 
  on 
  both 
  sides 
  of 
  

   the 
  stream 
  above 
  the 
  falls 
  preclude 
  this 
  view. 
  

  

  If 
  the 
  lake 
  were 
  drained, 
  so 
  that 
  only 
  a 
  stream 
  occupied 
  its 
  pres- 
  

   ent 
  bed, 
  this 
  stream 
  would 
  flow 
  IJ 
  miles 
  from 
  the 
  creek's 
  present 
  

   mouth, 
  and 
  nearly 
  300 
  feet 
  below 
  it. 
  If 
  this 
  were 
  the 
  original 
  con- 
  

  

  