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Huffman Dam is a dam located near Fairborn, Ohio in Southwest Ohio. It is an earthen dry dam that regulates the flow of the Mad River into the Great Miami River to prevent downstream flooding. It consists of 1,665,000 yd³ (1,273,000 m³) of earth, is 65 feet (20 m) high and stretches 3340 feet (1,020 m) across the valley. The dam can hold back 124,000 acre feet (153,000,000 m³) of flood water over its 7300 acres (30 km²) of basin. It was constructed in 1921 primarily using the fill trestle technique. The dam's waterproof impervious core consists of a mixture of clay and sand known as hydraulic fill that was mixed using a sluice. This core is stabilized on each side by a bank of sand and gravel. The dam is named after nearby Huffman Prairie which is now part of Wright Patterson Air Force Base. The dam proved to be the biggest task of the of the five dams constructed by the Miami Conservancy District. To make way for the dam, the Miami Conservancy District had to excavate nearly 700,000 yd³ (500,000 m³) of earth and rock to relocate fifteen miles (24 km) of the nearby New York Central railroad line over a route that included a 4800 foot (1,500 m) long, 120 foot (37 m) deep cut through solid rock. It also required the relocation of the town of Osborn, OhioOsborn, Ohio was a town located in what is now the flood-prone basin of the Huffman Dam. It was relocated two miles away during construction of the dam to a site near Fairfield, Ohio in 1921. In 1950, Osborn and the neighboring town of Fairfield were merg (now part of Fairborn, Ohio) with a population of 200 by a distance of two miles (3 km), as it was located in the flood-prone basin of the dam. The dam is currently maintained by the Miami Conservancy District.
*Huffman DamGreene County is a county located in the U. State of Ohio. As of 2000, the population is 147,886. Its county seat is Xenia 6. Geography According to the U. Census Bureau, the county has a total area of 1,078 km² (416 mi²). 1,075 km² (415 mi²) of it is lan
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