12 
Colorado Experiment Station 
Uncompahgre orifice, because of the comparatively high velocity of ap¬ 
proach in the orifice box. Orifices are used for delivering only a part of 
the water under this project, rectangular weirs being also used. 
Figure 1. (a) Showing the usual method of placing an Uncompangre orifice 
box in a ditch. 
Figure 1. (b) Side view of Uncompahgre orifice spill-box. 
AZUSA HYDRANT. 
Where the price of irrigation water is high, as in Southern Cali¬ 
fornia, it is often desirable to do away with surface ditches and con¬ 
duct the water to the land through underground pipes. This decreases 
the loss of water by seepage and evaporation, permits all of the 
land to be cultivated, and is especially desirable for orchard irrigation. 
The water is brought to the surface of the ground by standpipes which 
are arranged to deliver the water to several furrows. There are several 
