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Many pathways of water can enter through a dam structure to produce a well-defined nappe. However, engineers classify dams as either overflow dams, where water consistently flows over or is blocked through a gate on top of crest, or non-overflow dams, which channel water through or around the dam with emergency floodgates.
Chute spillway of Llyn Brianne dam in Wales. A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that water does not damage parts of the structure not ...
An emergency spillway with fuse plug (bottom) and an auxiliary ogee spillway (top) at New Waddell Dam. A fuse plug is a collapsible dam installed on spillways in dams to increase the dam's capacity. The principle behind the fuse plug is that the majority of water that overflows a dam's spillway can be safely dammed except in high flood conditions.
When the lake's water levels rose, it began to overflow at the top of the pipe connecting to the river, which spans 8-foot-wide and 200-foot-long, and ran at a rate of 48,400 cubic feet of water ...
Upstream along Teepee Creek is the Tee-Pee Creek Dam. The dam is 3 metres (9.8 ft) high and contains a reservoir with a volume of 270 dam 3 (220 acre⋅ft). It was built in 1950 and is owned and operated by the Saskatchewan Water Security Agency. [5] From Teepee Creek, Overflowing River carries on and crosses Highway 9 and then turns east. A ...
Rapidan Dam, an earth-and-concrete structure and electrical generating station, built in 1910, had begun to overflow. A crowd watches the Blue Earth River after its bank collapsed at Rapidan Dam ...
Floodwaters that gushed from an overflowing dam in northern Nigeria engulfed a zoo and swept animals including crocodiles and snakes into communities, as the region battles some of the worst ...
Wilbur Dam is a concrete gravity overflow dam 77 feet (23 m) high and 375 feet (114 m) long, and has a generating capacity of 10,700 kilowatts. [4] [5] The dam's spillway has four radial gates with a combined discharge of 34,000 cubic feet per second (960 m 3 /s). [6]