GATE STRUCTURES FOR IRRIGATION CANALS. 61 
WASTE GATE, LAKEVIEW IRRIGATION CO. CANAL, WYOMING. 
Plate XII, figure 1, shows a small waste gate set in the lower levee 
of the canal. The crest of the solid wall is set as determined to be 
the safe or desirable limit for a high-water line in the canal. Excess 
water within limits, due to storms, passes safely off into the natural 
drainage way to which the waste is connected. The side walls pre- 
vent the erosion and washing out of the bank. 
WASTE GATE, TURLOCK IRRIGATION DISTRICT, CALIFORNIA. 
The use of very cheaply-built wooden radial gates is brought out 
in the view of a waste gate shown in Plate XII, figure 2. This gate 
opens into a short canal with a capacity of 1,000 second-feet. This 
great discharge is obtained with but three openings. Note that the 
winches are located only a feAV inches above the tops of the shutters 
and that no high gate standards are required. Although the water 
in the main canal at the time this view was taken was nearly even 
with the top of the gates, there was absolutely no leakage noticeable 
at the sides of the shutters, the water in the foreground being either 
seepage or that remaining from the last run of water through the 
gate. Note also that this construction provides a crest waste way 
w^hich will pass off excess water in case the water level in the canal 
reaches the tops of the gate shutters. 
The face of these gates is simple wooden planking, spiked to joists, 
from which the thrust of the water is carried by wooden arms to a 
galvanized pipe axle extending completely across the openings. This 
construction is shown in figure 14, page 50. 
o 
WASHINGTON : GOVERNMENT PRINTING OFFICE '. 19X4 
