36 
BULLETIX 831, U. S. DEPARTMENT OE AGEICEXTUEE. 
The claim that the siphon spillways constructed as control devices 
on the Xew York State Barge Canal were the first installations in 
this country is undisputed. This project offered several ideal cases 
for testing their adaptability in regulatory capacities and they were 
utilized in several locations where other and better known structures 
were either impracticable or impossible. Two of the three locations 
i i 
A Apron \j necessary. 
Fig. 14. — Cross section of larger size siphon spillway in battery of three. These are 
also located at points where automatic operation is essential, and as built and operated 
by the Mount Whitney Power & Electric Co. are capable of discharging 100 cubic feet 
per second. 
required a structure capable of disposing of the waters accumulated 
from an intercepted drainage area and which had to be discharged 
into an adjacent stream. Surface fluctuation was limited, so that the 
overflow into the canal could not be in excess of the outflow and it had 
to be discharged with rapidity equal to the inflow. The old form of 
overpour spillway with the necessary length of crest to dispose of the 
water within the limits of surface rise and fall was imj^ossible in at 
