Hannen Lake, central Iowa
Hannen Lake is on a tributary of Coon Creek in Benton County, Iowa and is used for recreation purposes. Construction was completed in 1959. It has a normal surface area of 45 acres. It is owned by Benton Co Conservation Board.
Hannen Lake Dam is of earthen construction. The core is assumed to be homogeneous. The foundation is assumed to be soil. Its height is 28 feet with a length of 600 feet. Its capacity is 886 acre feet. Normal storage is 366 acre feet. It drains an area of 0.9625 square miles.
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