Bui. 194, U. S. Dept. of Agriculture. 



Plate XVII. 



Fig. 1=— Logan and Hydepark Canal, Utah. 



(.No. 233— Upstream from Station 2.) 



Fig. 2.— Cochrane Ditch, Reno, Nev. 

 (No. 23fr— Upstream from Station 5.) 



Fio. 3,— Perrault Canal, Boise, Idaho. 



(No. ZZl—Unv/UhlTinu) from HUillon 0.) 



