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The Hoover dam has two spillways, one on the Nevada side and one on the Arizona side. The spillways are located 27 feet below the top of the dam, one on each side of the dam. Any water getting up that high will go into the spillways. There are "Drum Gates" in the spillways, but these are actually there to allow more water to be stored behind the dam. When they are raised they can allow an additional sixteen feet of level to be stored behind the dam. The spillways have only been needed twice in Hoover Dams history. The first time was in 1941 to test the system. The second time was in 1983 for an actual flood.

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Q: Does Hoover Dam have floodgates
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