CONCRETE LINING FOR IRRIGATION CANALS. 

 measurements — Continued . 



15 



Loss per mile. 



Loss per 

 square 

 foot of 

 wetted 

 area in 



24 hours. 



Character of material 

 in the channel. 



Source of informa- 

 tion. 





Maxi- 

 mum. 



Mini- 

 mum. 



Mean. 



Remarks. 



Per 

 cent. 



Per 

 cent. 



Per 



cent. 

 1.220 



1.470 



1.540 



1.24 



.76 

 1 .75 



Cu. feet. 

 0.93 



.82 

 i .53 



1.22 



1 1.65 



Some gravel and 

 some white lime. 

 See reference. 



Report Elias Nelson, 

 Idaho Expt. Sta. 

 Bui. 58, May, 1907. 



Measured July 2, 1907, from 

 end of main canal to Cot- 

 tonwood Creek. 



Measured July 3, 1907, Cot- 











do... 



wood Creek to Cedar draw. 

 First season. 



Measured July 6, 1907, Cedar 

 draw to near end of canal. 

 First season. 



Measured July 26, 1912, from 

 1 mile above McMullin 

 Creek to Cottonwood 

 flume. Banks solid; uni- 

 form grade and cross sec- 

 tion; porous irrigated land 

 above; used 7 years. 







Compact gravel for h 

 mile on either side 

 of McMullin Creek; 

 compact clay loam 

 in other places. 



Compact gravel 

 mixed with dense 

 clay loam not so 

 gravelly as preced- 

 ing section. 



Compact gravel and 

 clay loam, mixed 

 with gravel. 



Report D. H. Bark, 

 9th Biennial Re- 

 port State Eng. 

 Idaho, 1911-12. 



do 



do... 











1J miles below Rock Creek 

 to 1 mile above McMullin 

 Creek. Banks solid and 

 well above water line; uni- 

 form grade and cross sec- 

 tion; used 7 years. 

 Measured July 26, 1912, from 



- 







J mile above to 1| miles be- 

 low Rock Creek crossing. 

 Banks very solid and well 

 made; uniform grade and 

 cross section; porous irri- 

 gated land above; used 7 







.65 



.81 



48.00 

 28.30 



1.41 



1.79 



.56 

 .63 



Deep uniform clay 

 loam. 



do 



do... 









do 



station 180+30 to within 

 4 mile of Rock Creek cross- 

 ing. Banks well above 

 water line; uniform grade 

 and clean uniform cross 

 section; used 7 years. 







Medium clay loam, 

 some surface rock 

 on top of ground. 



Deep medium clay 

 loam. 



do. 



J mile below Low Line 

 Canal to station 180+30. 

 Banks well above water 

 line; uniform grade and 

 clean uniform cross section; 

 used 7 years. 



Measured Sept. 10, 1912, 1 

 mile south of Twin Falls. 

 Banks irregular; some grass 

 and weeds; used 5 years. 



Measured Sept. 14, 1912, 4 







do 









miles northwest of Twin 

 Falls. Irregular cross sec- 

 tion; badly eroded; some 

 grass and weeds; used 4 







17.80 

 17.40 



.83 

 1.15 



Medium clay loam, 

 hardpan near sur- 

 face. 



Deep medium clay 

 loam. 



do :. 



Measured Sept. 11, 1912, 7 







do 



miles southwest of Twin 

 Falls. Irregular cross sec- 

 tion; banks eroded; sweet 

 clover in lower half of 

 ditch section. 

 Measured Sept. 13, 1912, 2 

 miles northeast of Filer. 

 Sodded banks; moss in 

 water; uniform cross sec- 

 tion; water in ditch above 

 normal surface of ground; 

 used 4 years. 









