CONCRETE LINING FOR IRRIGATION CANALS. 

 measurements — Continued . 



11 



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. 



0.65 



.70 

 125.30 



9.92 

 i 1.11 



3.38 

 12.49 



6.08 

 15.36 

 12.-56 



3.25 



1 14. 00 



5.23 



.89 



2.47 

 22.60 



6.25 



38.00 

 17.00 

 5.20 



6.50 

 5.30 

 4.10 

 7.30 



25.00 

 30.00 



2.66 

 8.00 



20.00 

 8.75 

 13. 90 



3.40 



Cu. feet. 

 0.51 



.73 



Gravelly soil 



do 



[Report L. G. Car- 

 J penter, Bui. 48, 

 1 Colo. Expt. Sta., 

 ( 1898. 



do 



Individual measurem e n t s 

 show variations of 8.47 per 







cent gain to 8.95 per cent 



loss. 

 (■Individual measurem e n t s 

 J show variations of 8.77 per 









do 



] cent gain to 12.18 per cent 

 [ loss. 













Lateral of Rio Grande 

 Canal system. 











do 



Measured July 13, 1897.2 

 Do.2 











....do 











do 



Measured July 14, 1897.2 

 Do. 2 











do 











...do 













do 













do 



Measured Aug. 4, 1897. In- 

 dividual measure m e n t s 

 show variations of 5.07 to 

 0.24 per cent per mile. 



Measured Aug. 4, 1897. 

 Lateral IF part of Rio 

 Grande Canal svstem. 



Measured 1893 1894 Aver- 











do 











do 











Report H. G. Rasch- 

 bacher, O. E. S. 

 Cir. 65, 1905. 



do 



age for two seasons' con- 

 secutive run. 









Silted 



Usual grade. 



Double usual grade. High 

 velocity prevented silting. 

 This measurement and pre- 

 ceding on different laterals. 











do 









Gravel 



Report A. E.Wright, 

 O. E. S. Cir. 58, 

 1903. 



do 









do 











do... 



do... 



Grade very excessive. 

























do 



ly in first mile. 











do. 



Do. 











do... 













do.... 



Carrying only one-fourth ca- 

 pacity; even grade and 

 good alignment. 

 Do. 











do 











do 



Even grade and good align- 

 ment. 

 Do 











do. 











do.. 



Grade very steep, channel 

 badly eroded in places. 











do 























Report W. F. Bart- 

 lett, O. E. S. Bui. 

 158, Sep. No. 4, 

 1904. 











Lined with soft, fine 

 mud about 0.3 foot 

 deep. 













2 Measurements taken on abutting sections and given in order. 



