A spillway is a structure used to provide the controlled release of flows from a dam or levee into a downstream area, typically the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that the water does not overflow and damage or destroy the dam.

Wikipedia

Types of Spillway Gates

Followings are the spillway gate types:

  1. Dripping shutters or permanent flashboards
  2. Stop logs and needles
  3. Radial gate or tainter gates
  4. Drum gates
  5. Vertical lift gates or rectangle gates 
 

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