The Unified Development of the Tennessee River plan stressed TVA was to provide flood control, navigation and electricity for the region. TVA's dams are tangible evidence of its primary mission: improving life in the Tennessee Valley.
A lot of TVA dams are on unnavigable rivers.  Electricity was a major goal, for sure, Fontana Dam was built to power aluminum production in Alcoa during the war as I understand it.  The floods preTVA were pretty bad.  Of course, that would encourage folks to build higher up instead of in a "flood plain".  
My cousin lives near Murphy, NC, she says they are undamaged but were without power for a while.  This is in far western NC, so likely avoided the worst of it.  I spent a lot of time in many of these towns over the years, the photos I see are incredible.  I'm looking for a real charity somewhere, not sure about some of these.  We have a brief trip sculeduled into the north GA mountains midOctober, word is where we're headed is fine.