Holter Dam is a hydroelectric straight gravity dam on the Missouri River about northeast of Helena, Montana, in the United States. The dam, which was built between 1908 and 1918, is long and high. The reservoir formed by the dam, Holter Lake (also known as Holter Reservoir) is long and has a storage capacity of of water when full. The dam is a "run-of-the-river" dam because it can generate electricity without needing to store additional water supplies behind the dam.
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Holter Dam
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