44 



BULLETIN" 115, TJ. S. DEPAKTMENT OF AGBICTJLTTJKE. 



The average cost of vitrified-clay deliveries with iron gates, as 

 given by the chief engineer of the Holbrook irrigation district, near 

 La Junta, Colo., is as follows : 8-inch pipe and gate, $27.70 ; 10-inch, 

 $30; 12-inch, $35, 15-inch, $40. 



DELIVERY GATE, SUNNYSIDE UNIT OF YAKIMA PROJECT, UNITED STATES 

 RECLAMATION SERVICE, WASHINGTON. 



The intake of a tube delivery or turnout gate unless set at just the 

 right point is a great source of annoyance because of the silt and 

 sand that gathers just in front of the gate when it is not in use. To 

 obviate this condition, remove the tendency of the eddies in the enter- 

 ing water to scour the canal bank, and preserve as much as possible 

 the unbroken side of the canal the United States Reclamation Serv- 



m 



'I <9Sa/£ 



'■*■ 4"*6" 



■3<?fi± 



~M*/j£ Brace. 



j-121 



mqmy&m 



r< 



3cA/s/ sect/on. 



pwf ' >J t Position of intake with reference to 

 * *c!i ■* & *- canal section to be determined 



oi t?>3 on the around. 



Fig. 12. 



-Tube delivery extending into canal, Sunnyside unit, Yakima project, United 

 States Reclamation Service. 



ice is using a system of installation on the Sunnyside Canal in 

 Washington which is very favorable to canal operation. 



A riveted-steel pipe extends out into the water of the canal, as 

 shown in figure 12, being supported at the front end by the gate 

 standards which are carried down to a footing wall. The steel pipe 

 is carried a short distance into the bank where it meets a concrete 

 pipe in a concrete cut-off collar. This installation does away with a 

 wood or concrete face slab at the entrance to a tube outlet when set 

 flush with the bank and also removes the opening in the tube from 

 danger of becoming clogged with silt and trash. 



The only place that comes to the writer's mind where such a con- 

 struction, cost permitting, might not be used, would be where it is 

 necessary to dredge silt out of the canal or lateral. In such cases 



