Spillway

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  Spillway of Kangaroo Creek Reservoir dam in the Adelaide Hills, South Australia.

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  Bell-mouth spillway at Llyn Celyn

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  The huge spillway for the Robert-Bourassa Reservoir, Quebec, Canada, fittingly called the "Giant's Staircase".

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  Spillway gates control the level of Lake Diefenbaker, Saskatchewan, Canada

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  Lake Texoma, on the border of Oklahoma and Texas, USA, used its emergency spillway for the third time in July 2007.

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  Scrivener Dam, in Canberra, Australia, was engineered to withstand a once-in-5000-years flood event.

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  The spillway for the Rivière des Prairies dam, in the north end of Montreal.

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  A labyrinth spillway and a fish ladder (left) of the Hope Mills Dam in North Carolina

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  Bell-mouth spillway at Lake Berryess, the largest lake in Napa County, California.

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  Water enters Hoover Dam's Arizona drum-gate spillway (left) during the 1983 floods.

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  A labyrinth spillway entrance (bottom) at the Ute Dam in New Mexico.

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  An ogee-type spillway at the Crystal Dam in Colorado.

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  An emergency spillway with fuse plug (bottom) and an auxiliary ogee spillway (top).

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  The serrated weir spillway of the Li-Yu-Tan Reservoir, located in Sanyi Township, Miaoli County, Taiwan.

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  Semicircular spillways of Ohzuchi Dam (Shiga Pref., Japan)

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  The Duplanter spillway (Caniapiscau reservoir, northern Quebec).

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  Made in 1966, the Geehi Dam spillway (the world's largest of it's type) has never seen water as of March 2019.