CONCRETE LINING FOE IEEIGATION CANALS. 

 measurements — ( 'on tin ued . 



19 



Loss per mile. 



Maxi- 

 mum. 



Mini- 

 mum. 



Mean. 



Loss per 

 square 

 foot of 

 wetted 

 area in 

 24 hours. 



Character of material 

 in the channel. 



Source of informa- 

 tion. 



Remarks. 



Per 

 cent. 



Per 

 cent. 



Per 

 cent. 



10.80 



Cm. feet 

 2.22 



3.32 



2.50 



7.60 



2.28 



2.58 



.55 



Medium gravelly. 



.do. 



Report D.H.Bark, 

 9th Biennial Re- 

 port State Eng. 

 Idaho, 1911-12. 



Gravelly. 



Sand and gravel . 



Medium clay loam. 



Shallow clay loam, 

 hardpan at 1J feet. 



Clay loam underlain 

 with hardpan at 

 U feet. 



Clay loam . 



Shallow clay loam . 



Medium clay loam, 

 hardpan at 2J feet. 



Medium clay loam, 

 underlain with 

 hardpan and 

 gravel beneath. 



.do. 



.do. 



.do. 



..lo. 



.do. 



.do. 



.do. 



.do. 



.do. 



Measured Aug. 24, 1912, 4J 

 miles southwest of Rigby. 

 Uniform cross section; 

 partly in dike; weeds and 

 sweet clover growing in 

 ditch; used 7 years. 



Measured Aug. 23, 1912, 7 

 miles southwest of Rigby. 

 Uniform cross section; 

 carrying about one-half ca- 

 pacity; clean channel; uni- 

 form velocity; used 6 years. 



Measured Aug. 17, 1912, 4J 

 miles southwest of Rigby. 

 Irregular grade and cross 

 section; moss and roots in 

 channel; used 8 years. 



Measured Aug. 16, 1912, 6 

 miles southeast of Rigby. 

 Uniform grade and cross 

 section; growth moss and 

 weeds in channnel and on 

 banks; used 8 years. 



Measured June 20, 1912, 1£ 

 miles east of Hollister. 

 Banks fairly regular; bot- 

 tom fairly well silted; used 

 1 year. 

 Measured June 19, 1912, J 

 mile east of Hollister. Ir- 

 regular cross section; bot- 

 tom silted in places; other 

 places hardpan exposed; 

 used 1 year. 



Measured June 20, 1912, 1J 

 miles east of Hollister. 

 Clean, uniform cross sec- 

 tion; hardpan exposed; 

 used 2 years. 



Measured June 21, 1912, 2 

 miles east of Hollister. 

 Clean, uniform cross sec- 

 tion; used 2 years. 



Measured June 18, 1912, 1£ 

 miles southwest of Hollis- 

 ter. Clean but somewhat 

 irregular cross section; 

 ditch across nonirrigated 

 sagebrush lands; used 1 

 year. 



Measured June 19, 1912, 2 

 miles south of Hollister. 

 Clean, uniform cross sec- 

 tion; water 2\ feet below 

 surface, flowing on hard- 

 pan; used 2 years. 



Measured June 17, 1912, 3 

 miles southwest of Hollis- 

 ter. Uniform cross section 

 and grade; canal carrying 

 small part of capacity; 

 water flowing on hardpan; 

 used 1 year. 



