CONCRETE LINING FOR IRRIGATION CANALS. 43 



elements, value of'C" in Chezy' s formula and "n" in Kutter 's formula — Continued. 





, 







ft 











8.2 



t>>o 



A 3 



'o ^ 



ofl 



o M 



.a 



> 



o 



2.10 



72.5 



2.85 



90.8 



2.94 



92.5 



3.12 



103 



3.09 



103 



2.97 



97 



2.84 



94 



2. 70 



97 



3.06 



99 



2.86 



105 



3. 16 



112 



2.55 



99 



3.89 



110 



2.62 



104 



3.25 



113 



3.34 







3.94 



109.7 



1.38 



72.6 



12.4 



104.3 



19.3 



114.4 



19.1 



114.1 



13.1 



133. 1 



12.5 



131. 7 



20.4 



147.8 



20.6 



150.5 



3. 86 



111.4 



1.86 



80.2 



3.75 



92.0 



.0192 

 . 0176 

 .0177 



.0176 

 .0182 

 .0171 

 .0168 

 .0151 



.0142 



.0156 



.0144 



.0141 



.0138 



.0146 



.0154 



.0171 



. 0130 

 .0140 

 .0140 



.0109 

 . 0109 

 .0110 



.0108 



■g,j 



r3 5? 



§ 3 



1 Vertical 

 curve. 



Current 

 meter. 



Vertical 

 curves, 



. 0160 

 .0155 



Current 

 meter, 

 integ. 



Current 

 meter 



in main 

 canai. 



.do. 



Vertical 

 curves. 



...do. 

 ...do. 



«3 

 3 



Level and 

 hook gage 



Level; 

 grade of 

 botto m 

 for long 

 lengths 

 taken as 

 slope of 

 water 

 surface. 



Level and 

 hook gage. 



..do 



.do 



Level and 

 hook gages 

 in wells. 



.do. 



Level and 

 hook gage. 



..do... 



..do. 



Condition of surface, 

 etc. 



Extremely roug 

 concrete. 



Expansion joints 12 

 feet apart usually, 

 some 8, 10, and 16 

 feet, made by in- 

 serting temporary 

 wooden strips. 

 Through neglect 

 of management the 

 wooden strips were 

 not removed and 

 asphalt inserted, 

 but projected in 

 some cases from 1 \ 

 to 2 inches above 

 surface and im- 

 peded flow. These 

 were more frequent 

 in the upper por- 

 tion. There was 

 also some gravel 

 on the bottom in 

 the upper portion. 

 Concrete placed 

 v, ithout forms, fin- 

 ish of 

 smoothness 



Medium smooth con- 

 crete. 



.do. 



Rough concrete, in- 

 fluence d i s a p - 

 peared through de- 

 posit of slime and 



I Concrete deposited 

 against wood 

 forms; no retouch- 

 ing of surface. 



..do 



Fairly smooth con- 

 crete. 



Fairly smooth ce- 

 ment finish. 



Smooth cement wash 

 concrete. 



Remarks. 



Tangent. Sharp 

 curves adjacent 

 each end and a 

 very rough rock 

 cut beginning 

 about 200 feet 

 below this sec- 

 tion. 



Mean of 3 measure- 

 ments. 1 



Mean of 5 measure- 

 ments. 2 



Mean of 6 measure- 

 ments. 2 



Mean of 3 measure- 

 ments. 2 



Mean of 3 measure- 

 ments. 2 



Mean of 5 measure- 

 ments. 2 



Mean of 4 measure- 

 ments; depth 

 0.83 to 2.18. 2 



Mean of 5 measure- 

 ments; depth 0.8 

 to 2.27.2 



Mean of 5 measure- 

 ments; depth 

 0.67 to 2.33. 2 



Mean of 8 measure- 

 ments; depth 

 0.85 to 2.45 2 



Mean of 7 measure- 

 ments; depth 0.6 

 to 1.87.2 



Mean of 8 measure- 

 ments; depth 0.6 

 to 2.29.2 



Wooden strips at. 

 joints projecting 

 \\ to 1J inches. 



Wooden'strips at 

 joints projecting 

 \\ to \\ inches. 



Tangent" with 

 slight curve. 



•On 2° curve. 



Reference and 

 authority. 



Tangent. 



Slight amount of 

 moss, new flume, 



Some gravel on 

 bottom. 



Tangent rough- 

 ened by a dark 

 deposit. 



F. C. Scobey, Irri- 

 gation Investiga- 

 tions. 



Unpublished rec- 

 ords of Office Ir- 

 rigation Investi- 

 gations. Meas- 

 urements by E. 

 R. Barrett under 

 direction of W. 

 W. McLaughlin. 



B.P. Fleming, Irri- 

 gation Investiga- 

 tions. 



F. C. Scobey, Irr> 

 gation Investiga- 

 tions. 

 Do. 



(Records of IT. S. 

 \ Reclama tion 

 I Service. 



S. T. Harding, Ir- 

 rigation Investi- 

 gations. 



F. C. Scobey, Irri- 

 gation Investiga- 

 tions. 

 Do. 



J Alignment contains many curves. 



