68 BULLETIN 194^ U. S. DEPARTMENT OF AGRICULTTJEE. 



No. 232, SF-26**, Logan and Benson-Ward Canal, Utah. Bed of medium-sized 

 gravel. Flow mucli impeded by horsetail moss which occupied about one-fourth 

 of water section. Coefficient n=0.0352. 



No. 234, W-9+-I-, Hillsboro Ditch, Colorado. In general bad condition. Irregular 

 gradient. Banks rough. Gravel channel scoured by current. Coefficient n=0. 0371. 



No. 238, SF-62**, lateral of H>Tum Canal, Utah. Partially overgrown with alfalfa. 

 Strip of moss on each side occupied about one-fifth of channel. Bed of flat fragments 

 of rock, up to 3 inches greatest dimension. Coefficient n=0.0393. 



No. 242, SF-24**, canal of Brigham City Electric Light Co., Utah. Well-formed 

 canal. Bed of medium-sized unpacked gravel. One-third of water section filled 

 with long waving water plants. Coefficient n=0.0424. 



No. 246, SF-46**, Brigham City Canal, Utah. About half full of horsetail moss. 

 Such bed as exposed is gravel. Edges overgrown with cress and weeds. Coefficient 

 n=0.0499. 



No. 247, SF-53**, lateral of Thatcher Canal, Utah. About two-thii-ds filled with 

 horse-tail moss. Such bed as exposed is sediment. Coefficient n=0.0519. 



No. 248, SF-52**, lateral of Thatcher Canal, Utah. About three-fourths filled with 

 moss. Bed as exposed is fine sediment. Coefficient n=0.0529. 



COBBLE-BOTTOM DITCHES. 



No. 250, W-13H — \-, Beasley Ditch, Boulder, Colo. Channel of gravel on bottom 

 with cobbles on the sides. On a slight curve with no vegetation in channel. General 

 condition would be classed as good. Coefficient w=0.0220. 



No. 256, SF-47**, Logan and Hyde Park Canal, Utah. Entii-e channel composed of 

 loose coarse gravel up to hen's -egg in size. Coefficient ?i=0.0337. 



No. 257, SF-33**, lateral of Hyrum Canal, Utah. A case where water flows very 

 slowly over a rough surface on steep grade. Bed composed of loose cobbles up to 

 3-inch size. Coefficient n=0.0365. 



No. 258, SF-57**, lateral of Smithfield Canal, Utah. Canal on steep grade with bed 

 composed of gravel and cobbles. Coefficient n=0.0377. 



No. 260, SF-56**, lateral cf Smithfield City Canal, Utah. Edges uneven. Bed 

 of clean-washed gravel and cobbles. Coefficient n=0.0423. 



ADDITIONAL COPIES 



OF THIS PUBLICATION MAY BE PROCURED FROM 



THE SUPERINTENDENT OF DOCUMENTS 



GOVERNMENT PRINTING OFFICE 



WASHINGTON, D. C. 



AT 



25 CENTS PER COPY 



V 



