Monday, September 3, 2012

Labor Day

[“Tightening a nut on a guide vane operating ser[v]omotor in TVA’s hydroelectric plant, Watts Bar Dam, Tennessee. Located 530 miles above the mouth of the Tennessee River, the dam has an authorized power installation of 90,000 kw., which can be increased to a possible ultimate of 150,000 kw. The reservoir at the dam adds 370,000 acre-feet of water to controlled storage on the Tennessee River system.” Photograph by Alfred T. Palmer. June 1942.]

The Library of Congress has made this photograph available via Flickr.

Related reading
Labor Day 2010 (another Library of Congress photograph)
Servomechanism (Wikipedia)
Tennessee Valley Authority (Wikipedia)

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