CONCRETE LINING FOE IRRIGATION CANALS. 41 



elements, value of'C" in Chezy 's formula and "n" in Kuttef s formula. 



ft £ 



X, 



a ?o 



w 











S3 





OK 



i ft 



o'w 



■a M 

 o c 



Condition of surface, 

 etc. 



Remarks. 



Reference and 

 authority. 



J2 m 



.g 



•S-2 



r- SO 



5 a 











> 



o 



e 



Ss 



s 









4.23 



165.5 



0.0106 







Lining consists of 3J 



•Tangent; practi- 

 cally no gravel. 





4.18 



155.2 



.0114 







inches concrete 



Reverse curve; a 





4.08 



4.15 

 4.13 



187. 



161.5 

 153.5 



- 

 .0095 



.0110 

 .0116 



Current 

 ' meter. 



Level and 

 hook gage. 



base with \ inch 

 mortar coat. 

 Depth 6.5 inches 

 with 1 foot con- 

 crete berm on top. 

 Maximum depth 



few cobblestones. 

 Tangent; a few 



cobblestones. 

 Total of above 3. . . 

 Same 2 months 



later, more 



Unpublished rec- 

 ords of Office Ir- 

 rigation Investi- 



• gations. Meas- 

 urements by Don 

 H. Bark. 













of water 6 feet. 



gravel on bot- 













Surface equivalent 



tom. 





3.82 149.6 



.0118 







to sidewalk finish. 



Same 2 months 

 . later still. 





2.45 119 



.0132 













2.32 130 



. 0130 













3. 35, 145 



.0122 











Records of TJ. S. 



3.99 147 



.0124 











Reclamation 



2.43' 123 



2.45 129 

 3.37; 158 



.0127 

 .0131 

 .0112 



...do 



Gages 



(Same as above. Sur- 

 \ face very smooth. 



■Numerous curves. 



Service. Meas- 

 urements by W. 

 G. Steward un- 



4.08 141 



.0118 











der the direction 



4.32! 142 



.0126 











. of F. W. Hanna. 



4.15! 138 



.0129 













2.60 130 



.0122 













2.06 

 2.54 

 2.55 

 2.55 



115.2 

 107.3 

 108.1 

 107.5 



.0140 

 .0144 

 .0143 

 .0143 



Ldo 



(Level and 

 \ hook gage 



(Lining 4 inches 

 thick, hand tamp- 



\ ed;nosurfacecoat; 

 rough finish; no 



I moss. 



l Partly tangent 



Nearly all curves. . 

 [•One curve 



Unpublished rec- 

 ords of Office of 

 Irrigation Inves- 



Combination o f 

 J above two. 



tigations. Meas- 

 urements by 

 Don H. Bark. 



3.08 



4.68 

 3.57 

 2.64 

 1.84 

 4.91 



121 

 121 



.0140 

 .0154 

 . 0152 

 .0149 

 .0170 

 .0139 





Level, and 

 with 



Rough troweled sur- 



. 



(•Records of U. S. 





face. First meas- 



All tangent, gaged ! 



R e c 1 a m a tion 



..do 



gages 

 chipped 

 into con- 

 crete 

 every 

 200 feet. 



urements had con- 



500 feet below i 



Service. Meas- 



115 

 111 

 91 

 135 



■ siderable rock and 

 stone in bottom, 



• inlet and 300 

 feet above out- 



urements by W. 

 G. Steward un- 





others had only a 

 small quantity. 



let. 



der direction of 

 I F. W. Hanna. 



3.90 



116 



.0164 



...do 



...do 



Much gravel in bot- 



Tangent 



Same as above. 













tom. 

















Very little gravel in 







3.81 



3.48 

 2.67 

 2.35 



133 

 136 



113 

 114 



.0130 

 .0129 

 .0147 

 .0148 



Ldo 



...do 



bottom. Concrete 

 rather rough and 

 some of it disinte- 

 grated due to freez- 

 ing during con- 



•....do 



Do. 

















. struction. 

















(Similar to set above. 



| 





5.00 

 2.98 



148 

 145 



.0124 

 .0123 



}..do 



...do 



J Concrete troweled 

 1 to smoother sur- 

 [ face. 



[Number of sharp 

 [ curves. 



\ Do. 



5.48 



188.7 



.0101 



Vertical 



Level and 



Medium rough con- 

 crete, plastered 



Tangent 



F. C. Scobey, Irri- 

 gation Investi- 









curves. 



hook gage. 















joints. 





gations. 



3.65 



144.8 



.0121 



...do 



...do 



Very smooth cement 

 wash on concrete. 



do 



Do. 



4.14 





.0124 



...do 



...do 



do 



One slight curve 

 approximat e 1 y 

 same as above. 



B. P. Fleming, Ir- 

 rigation Investi- 

 gations. 



8.21 



139 



.0138 



...do.... 



...do 



Rough rock cut 



Tangent 



F. C. Scobey, Irri- 













rather lightly con- 





gation Investi- 













creted, leaving an 





gations. 













irregular undulat- 

















ing surface. 







2.06 



102 



.013 



Current 



Level and 



Surface smooth and 



Slight curve 



Records of U. S. 









meter. 



gages. 



regular. 





R e c 1 a m a tion 

 Service. 



7.10 



129 



.0132 









[Tangent 





6.86 



114 



.0149 







[Concrete built with 



All on curve with 











..do 



...do....... 



J forms not trow- 



100-foot radius. 



Do. 



6.94 



90 



.0189 



1 eled. Grain of 



All on curve with 













[ lumber shows. 



50-foot radius. 





7.15 



119 



.0142 













