CONCRETE LINING FOR IRRIGATION CANALS. 



measurements — Continued . 



23 



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. 



1.25 

 5.13 

 3.66 



12.00 



12.09 

 2.52 



11.61 



2.29 



.60 



.11.96 

 2.32 

 1.82 



18.36 



112. 40 

 18.50 



120. 00 



1 15. 20 



12.06 

 i 7.70 

 i 5. 52 

 43.90 



58.80 

 5.10 

 1.60 



2.40 

 3.20 

 3.30 

 3.90 



Cu. feet. 



0.83 

 2.04 

 1.42 



• 1. 31 



i 1.25 

 .23 



.86 



.52 



.17 



1.39 



1.18 



.68 



i 2.52 



12.20 

 i 1.46 



i 1.84 



i 1.96 



i .93 

 i 1.88 

 11.13 



1.17 



1.97 

 .35 



.57 



.86 

 1.28 

 1.39 

 1.82 



IClay and silt over- 

 > lain with wind- 

 ) blown ash. 



Gravel, silt, and clay 

 overlain with wind- 

 blown ash. 

 do 



C Report F. W. Han- 

 na, in report of 

 Boise Conference 



< of Operating En- 

 gineers, U.S. R.S., 

 Boise, Idaho, 



I Nov., 1911. 



do 



do 









^Bottom. 













Do. 







Do. 







Hardpan overlain 



with mud. 

 do 



do.... 









do 









Mostly mud bottom 

 underlain with 

 hardpan. 



Hardpan overlain 



with mud. 

 do 



do.... 



bench. 







.do.... 



Do. 







do 



Do. 







...do. . 



.do.... 



Do. 







...do... 



...do 



Do. 







Clay, silt, muck, and 



sand. 

 do 



.do.... 









.. ..do 



Do. 







...do .. 



do.... 



Do. 







do... 



.do 



Do. 







Granite, sand wash, 

 and silt. 



[Sand, granite wash, 

 | gravel, and silt. 



Clay loam mixed 

 with gravel. 



Deep and porous me- 

 dium clay loam. 



Impervious clay 

 loam. 



Deep, uniform, and 

 finely divided clay 

 loam. 



do 



do 



Do. 







} do 









Do. 







Report D. H. Bark, 

 9th Biennial Re- 

 port State Engi- 

 neer, Idaho, 1911- 

 12. 



do . 















mile south of Meridian. 

 Regular cross - section; 

 weeds on bank; first half- 

 section in low dLe; used 8 

 years. 

 Measured June 26, 1912, 3 







do 



do 



miles west of Meridian. 

 Deep uniform cross-section; 

 some weed growth in chan- 

 nel; used 5 years. 







miles west of Meridian. 

 Uniform cross-section; par- 

 allels a larger lateral 10 feet 

 away; used 5 years. 



Measured Aug. 31, 1912, sta- 

 tions 981+72to 1081+6. Car- 

 rying only small part of ca- 

 pacity; clean uniform grade 

 and cross-section; used 1 

 year. 



Measured Aug. 31, 1912, sta- 

 tions 889+49 to 981 + 72. 

 Balance same as foregoing. 



Measured Aug. 31, 19i2, sta- 

 tions 731 + 19 to 889+49. 

 Balance same as foregoing. 



Measured Aug. 31, 19i2, sta- 

 tions 491 + 84 to 731 + 19. 

 Balance same as foregoing. 



Measured Aug. 21, 1912, sta- 

 tions 235+11 to 491+84. 

 Balance same as foregoing. 







do 







do 



do 







do 



do 







do 



do 











