Spillway
A spillway is a construction to release extra water from a dam, in a way that this water does not cause damage. Each dam has a maximum capacity. Water that is more than this capacity cannot be stored, and has to be released. A spillway allows to do this in a safe way.
Gallery
Outlet-type spillway when in use
Outlet-type, unused
Overflow type
Looking down an overflow spillway
Overflow type
Spillway Media
Cross-section of typical spillway with Tainter gates
A stepped chute baffled spillway of the Yeoman Hey Reservoir in the Peak District in England.
Vegetation has grown in the bell mouth spillway at Covão dos Conchos since its construction in 1955 such that it resembles a natural formation
Glory hole spillway in Lake Berryessa, California, in March 2017
A U.S. Bureau of Reclamation type-III stilling basin
Lake Berryessa overflowing into the glory hole spillway at Monticello Dam.
A labyrinth spillway and a fish ladder (left) of the Hope Mills Dam in North Carolina
Spillway with flip bucket at Burdekin Dam
Water enters Hoover Dam's Arizona side channel drum-gate spillway (left) during the 1983 floods
