92 DIVISION OF WATER RESOURCES 



TABLE 32 



CLASSIFICATION OF TREES BETWEEN UPPER AND MIDDLE CONTROLS 



IN COLDWATER CANYON 



Above the upper control the growth in the main canyon bottom 

 is principally alders, with some sycamores, willow, maple, bay, etc. 

 The main canyon divides into two main branches, at a point 1920 feet 

 above the upper control. Many of the smaller branch canyons above 

 the forks have dense groAvths of ferns and underbrush. 



Between the middle and low^er controls there are only two branches 

 entering" the main canyon, one from the east on which the branch con- 

 trol was located, and one from the west vhich has an excellent bedrock 

 exposure just as it enters the canyon. The west branch canyon con- 

 tributed no water during the periods recorded in this report. There 

 were no visible indications of water entering the canyon between the 

 middle and lower controls during the period of record, except during 

 the first part of the 1932 season as measured at the branch control. 



There are several branch canyons entering the main canyon betw^een 

 the upper and middle controls. There were no visible indications of 

 any water entering- the canyon betAveon these controls at any time 

 during the 1932 season. 



The material filling the main canyon bottom between the middle and 

 lower controls ranges in width from 25 to 80 feet for the most part, and 

 has an average width of 49 feet and an area of 2.36 acres. Between the 

 upper and middle controls, tiie material filling the canyon bottom 

 ranges in width from 15 to 80 feet for the most part, and has an 

 average width of 44 feet and an area of 5.89 acres. On both sides the 

 canyon walls are very precipitons. 



The length of canvon in which surface water flowed was measured 

 in October, 1931, after the flow had recovered to its maximum connected 

 flow for the season. Above the forks, 1920 feet from the upper control, 

 there were 13,170 linear feet of branch canyons in which surface water 



