Capacity
Chickamauga Dam is a concrete gravity-type dam 5,800 feet (1,800 m) long and 129 feet (39 m) high. Its hydroelectric generating capacity is 160 megawatts. The dam has 18 spillway bays with a combined discharge of 470,000 cubic feet per second (13,000 m3/s).
A 60-by-360-foot (18 by 110 m) navigation lock allows barges and other boats to travel past the dam, raising or lowering vessels 53 feet (16 m) between Chickamauga and Nickajack reservoirs. Because the concrete of the original lock has deteriorated due to "concrete growth" caused by chemical reactions between its constituent cement and rock aggregate, a $375 million project to replace the lock began in 2003. The new 110-by-660-foot (34 by 200 m) lock was scheduled to be completed by 2014.
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