Tennessee Valley Authority. Watts Bar Dam hydroelectric plant. A boilermaker at TVA's Watts Bar steam plant, employed in the erection of condensers. This plant will supplement the big hydroelectric installations at Watts Bar Dam, which has an authorized output of 90,000 kilowatts, and a possible ultimate of 150,000 kilowatts. Each of the four big turbo-generators in the steam plant is rated at 60,000 kilowatts