CONCRETE LINING FOR IRRIGATION CANALS. 



measurements — Continued . 



29 



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. 

 53 



27.8 



29.1 

 8.84 



20.3 



10.9 

 17.3 



4.5 

 4.5 

 21.5 

 23.9 

 18.1 

 20.6 



Cu. feet. 



Cement gravel cut . . . 



Coarse, sandy soil, in 

 some few places 

 well silted. 



Much the same as 

 preceding section. 



Report A. P. Stover, 

 O.E.S. Cir. 67. 



do 



Measured July 20, 1905, waste 









gate No. 2 to end of gravel 

 cut. 









do 



end of gravel cut to lateral 

 No. 1. Under compara- 

 tively low velocities scour- 

 ing causes loss through por- 

 ous lining. 

 Measured July 20, 1905, from 

 lateral No. 1 to siphon in- 

 take. Toward lower end 

 section quite well silted. 









do 









1,800 feet flume, 4.8 

 feet wide, 2 feet 

 deep; remainder 

 coarse, porous 

 gravel and shifting 

 sand. 



Heavy sand and 

 gravel cuts. 



Much gravel and 

 loose sand. 



Fine sand and gravel. 



do 



headgate to station 440. 

 See detailed description in 

 succeeding 10 sections 

 measured. 



Measured Aug. 8, 1905, from 

 headgate to station 50. 

 Loss mostly through por- 

 tion in coarse, porous grav- 

 el; no deposition of silt; 

 cross section irregular; 

 banks of shifting sand. 



Measured Aug. 8, 1905, from 

 station 50 to station 100. 

 Irregular cross section; no 

 silting. 



Measured Aug. 8, 1905, from 

 station 100 to station 154. 

 Uniform cross section; 

 steep side hiU; silting only 

 at intervals. 



Measured Aug. 8, 1905, from 

 station 154 to station 209. 

 Uniform cross section; 

 well silted. 



Measured Aug. 8, 1905, from 

 station 209 to station 252. 

 Uniform cross section; 

 quite well silted. 



Measured Aug. 8, 1905, from 

 station 252 to station 325. 

 Uniform cross section; part 

 of section well silted. 



Measured Aug. 9, 1905, from 

 station 325 to station 353. 

 Uniform cross section; bot- 

 tom well silted. 



Measured Aug. 9, 1905, from 

 station 353 to station 400. 

 Uniform cross section; 

 fairly well silted. 



Measured Aug. 9, 1905, from 

 station 400 to station 450. 

 The several hundred feet 

 on ridge seeps heavily. 



Measured Aug. 9, 1905, from 

 station 450 to station 470. 



Measured Sept. 19, 1905. See 

 detailed description in pre- 

 ceding 10 sections meas- 

 ured. 



Measured 1905. Supplied 

 from pumping plant. 



Measured 1905. 









do 



do 















do 









Porous gravel, with 

 bottom filled 8 to 

 10 inches deep with 

 fine sand. 



Sand, with hardpan 

 at depths of 4 to 8 

 feet. 



Exposed gravel in 

 lower end of sec- 

 tion. 



do 









do 









do 









do 









Much the same as 

 preceding section. 



Mostly well silted 

 coarse sand. 



do 









do 







4.0 



10.1 

 6.4 





do 











Report F. L. Kent 

 in office manu- 

 script. 











