Bui. 37( 
>, U. S. Dept. of Ag 
ri culture. 
Plate XII. 
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1.— Typical Outlet Structure. Will Partially Recover Velocity Head. 
Pipe is one-half diameter too high, for inlet structure. Too much air would enter. 
Fig. 2.— View Taken from Structure in Figure 3. 
Hillside cut ravelings enter pipe and reduce capacity. A condition to be avoided. 
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Fig. 3.— Entrance well Submerged, Reducing Amount of Air Carried into Pipe. 
