52 



BULLETIN 115, U. S. DEPARTMENT OF AGRICULTURE. 



Where the concrete is mixed by hand on structures like the one 

 described, the Turlock district finds it costs $20 to $22 per cubic 

 yard, while machine-mixed concrete on large structures runs about 

 $13 per cubic yard. The mix used is one part cement to three parts 

 sand and five parts broken stone. Cement costs $2.75 per barrel f. o. b. 

 Turlock, and sand usually is close at hand. Stone costs $1.75 per 

 cubic yard and the hauling 17 cents per mile per yard additional. 

 The reinforcing bars cost 3J cents per pound at San Francisco. The 

 total cost of a structure like the one in figure 14 is about $300. 



Where a similar design is used for a simple check gate, a lateral 



headgate, or a drop 

 of less than 2 feet, 

 the pier walls are 

 carried level on top, 

 the slope being omit- 

 ted, and the axle set 

 3 inches higher and 

 3 inches farther back 

 from the face of the 

 gate; also the lower 

 12 inches of the gate 

 shutter is replaced 

 by a 12-inch weir 

 board. Where used 

 as a waste gate or 

 in an}^ place where 

 tightness is desirable 

 the shutter is made 

 water-tight by plac- 

 ing waterproof roof- 

 ing paper between the two layers of the double face and rubber belting 

 is placed at the edges. 



SUBLATERAL CHECK, TIETON UNIT, YAKIMA PROJECT, UNITED STATES 

 RECLAMATION SERVICE, WASHINGTON. 



A check which is well adapted to withstand a fall of water behind 

 it is shown in figure 15. It is used for small laterals, and is adapted 

 to the temporary construction which contemplates a permanent 

 structure similar to the one shown in figure 13, page 47. 



COMBINED CHECK AND DELIVERY STRUCTURE, ROCK CREEK CONSERVATION CO., 



WYOMING. 



The " L " construction of check and delivery gates is well exem- 

 plified in the view (PI. X, fig. 2) taken on one of the main laterals 

 of the Rock Creek Conservation Co., in Wyoming. 



Lumber Bill 







No. Dimensions Length FBM 



•A /^^ 





8 lVi«l2"s.lS.2e. 3 O" 48 



.' '* ^^ 



l( ■ 





2 ■• 8' 0" 32 



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\* s 





3 » " 4' 2" 24 



i si%$ 





N *■ S 





2 \'/i'b" " t 3" 4 



jt^s^-L <• 









3 « » 4' 3" 1 3 



T 



wr 





<\4& 





2 2" -6" rough 3' 10" 6 





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1 .. .. 4' 0" 4 











2 2"' 4" ■• 2 7" A 





\ \\ 







2 ,. •■ 3' 10" 5 









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1 .. ., 4' o" 3 Total 145. 







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1 







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if ' 



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c ^\ * /;, ';^^.\\ vs 





7 ' 



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'■y,- ; 









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Fig. 15.- 



-Sublateral check, Tieton unit, Yakima project, 

 United States Reclamation Service. 



