Lake Niangua is a 360-acre hydroelectric lake in southern Camden County, Missouri, USA, on the Niangua River. The lake has a public access with a boat ramp and picnic area. The site for the tunnel dam was chosen because a 500-foot long cave was found that extended ridge separating the upper and lower bents of the river. In 1911, the cave …Lake Niangua is a 360-acre hydroelectric lake in southern Camden County, Missouri, USA, on the Niangua River. The lake has a public access with a boat ramp and picnic area. The site for the tunnel dam was chosen because a 500-foot long cave was found that extended ridge separating the upper and lower bents of the river. In 1911, the cave was then modified so the river flowed through it during dam construction. There is usually no water running between the dam and the lake's powerhouse.
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