Great Falls Dam (Tennessee) - History

History

Throughout the 19th century, entrepreneur after entrepreneur attempted to harness the extraordinary hydro power potential of the Caney Fork only to be defeated by one of the volatile river's disastrous floods. The first major establishment to utilize the river's power at Great Falls was the Bosson Mill, a gristmill and carding factory that operated at the site across the river from the Power House from the 1860s until its destruction by a flood in 1882. The most prominent venture at Great Falls Gorge was the Falls City Cotton Mill Company, which established a cotton mill and company town, Falls City, just above the gorge in 1892. The company turned a moderate profit until 1902, when the Good Friday Flood destroyed its toll bridge and powerhouse, and the mill was forced to close (the mill and the town's "spring castle" are still standing, however).

By 1900, the rise of major industry in Nashville brought an increased demand for electricity. In 1901, Nashville entrepreneur Arthur Dyer formed the Great Falls Power Company and purchased land on the north side of the gorge with plans to build a dam. Dyer had trouble getting financing for the project, however, and in 1912 sold Great Falls Power to the Tennessee Power Company. The original plans called for a dam 110 feet (34 m) high. At the "Narrows," where the two tunnels are now located, an open channel was to be made from the Collins River to the Caney Fork. The water was to be carried across the gorge in a steel flume and then in an open canal across Horseshoe Bend, a distance of 1.5 miles (2.4 km). The Power House was to be located at least 3 miles (4.8 km) by river below the present Power House. In so doing a total head of 235 feet (72 m) would have been available; 110 feet (34 m) at the dam, 75 feet (23 m) between the dam and the present Power House and 50 feet (15 m) around horseshoe bend. With financing from Chicago business interests, Tennessee Power began construction work on the dam's foundation. Within a month, however, the Caney Fork burst its banks again, flooding out the project's excavation work and destroying its cofferdams. Tennessee Power again struggled with finances, but was able to resume construction in 1915 and by late 1916, the 40 feet (12 m) high dam had been completed. The plant went into operation on January 1, 1917.

In 1922, the Tennessee Power Company merged with several other entities to form the Tennessee Electric Power Company (TEPCO). TEPCO tripled the capacity of Great Falls Dam by raising the dam 35 feet (11 m) and installing a second generator at the powerhouse downstream. The dam faced its first major test in March 1929, when several cloudbursts atop the Cumberland Plateau caused the Caney Fork to expand to record flood volumes, sending wreckage and uprooted trees crashing into the dam. The Great Falls Power House was flooded and a substation was destroyed, but the dam held.

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