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Spillway

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spillway [′spil‚wā]
(civil engineering)
A passage in or about a dam or other hydraulic structure for escape of surplus water.
Spillway 

a hydraulic structure for the discharge of excess (flood) water from a reservoir and for the useful release of water into tailwater. A spillway may have openings: surface openings on the crest of a dam, openings sunk below the level of the headwater, other types of deep openings, or two kinds of openings, as in a two-stage spillway. The flow of water is regulated by locks. Some automatic spillways (for example, those working by means of siphons or shafts) are not equipped with locks. Spillways that are built in the bypass of concrete and earthen dams are called coastal spillways.
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7m overflow spillway at Ramsden Reservoir near Holmbridge on Friday.
Paths open after reservoir upgrade by Huddersfield Daily Examiner (Huddersfield, England)
Main spillway has a discharge capacity of 650,000 cusecs (18,406 cumecs), and auxiliary spillway 8,50,000 cusecs (24,070 cumecs).
Tarbelas power generation capacity to increase by 960 MW soon: ... by Balochistan Times (Baluchistan Province, Pakistan)
Early in 2007, the company operated a rock spillway in one of its wastewater ponds, where mining material separates from clay and other undesirable matter, said Chris Bayham, a natural resource specialist with the department.
Egge fined $41,000 for water discharge by The Register-Guard (Eugene, OR)
 
 
 
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