Bulletin 831, U. S. Dept. of Agriculture. 



PLATE XI. 



Fig. I. — Automatically Operated Gate with Siphon Spillway on Each End. 



Located on main distributing canal, South San Joaquin Irrigation District, near Ripon, Calif. 



Fig. 2. — Check Gates and Intake of Siphon Spillway, Orland Project, 



California. 



Intake lip of siphon is submerged and only air inlet shows at left of picture. Note close control 

 of water level indicated by water line on structures. 



