A spillway is a structure used to control the release of water from a dam or downstream, usually on the banks of a dammed river.

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"For safety, the spillway must have sufficient flood discharge capacity, which is likely to occur during dam operation."

- Approach channel
.- Control structure.
- Discharge carrier.
- Enemy dissipators.

Components of Spillway:

Types of spillway gates:

1. Straight drop spillway.
2. Ogee Spillway.
3. Shaft Spillway.
4. Chute Spillway.

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