Power and conservation. Chickamauga Dam, Tennessee Valley Authority (TVA). Generator hall of the powerhouse at the TVA's Chickamauga Dam. The dam, located near Chattanooga, 471 miles above the mouth of the Tennessee River, has an authorized power installation of 81,000 kilowatts, which can be increased to a possible ultimate of 108,000 kilowatts. The reservoir at the dam adds 377,000 acre feet of water to controlled storage on the Tennessee River system. The power that goes out over its 154,000 volt transmission line serves many useful domestic, agricultural and industrial uses