Bui. 194, U. S. Dept. of Agriculture. 
Plate XVII. 
1 ~ 
' J 
^» : ' J ..H 
M 
.; J!EC 
Hi 
■■""^5SSI^ 
• 
^•JpKSpi 
Fig. 1,— Logan and Hydepark Canal, Utah. 
(No. 233— Upstream from Station 2.) 
Fig. 2.— Cochrane Ditch, Reno, Nev. 
(No. 236— Upstream from Station 5.) 
g/jt.. 
m . ./.■■ ■'^Kfr. j 
- 
jHHPv s , JkSk 
mk 
ERf '^rJS ^HHB* 
"Wj 
HkK 
BBS 
Fig. 3.— Perrault Canal, Boise, Idaho. 
(No. 237— Downstream from Station 0.) 
