head-gate

head gate

noun
1.
a control gate at the upstream end of a canal or lock.
2.
a floodgate of a race, sluice, etc.

Origin:
1830–40, Americanism

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
head gate
 
n
1.  Compare tail gate a gate that is used to control the flow of water at the upper end of a lock or conduit
2.  another name for floodgate

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