DALLAS (Standard&Poor's) July 12, 2011-- Standard&Poor's Ratings Services assigned its 'AA' long-term rating to the Nashville&Davidson County Metropolitan Government (Metro), Tenn.'s $200.665 million series 2011 general obligation (GO) refunding bonds. At the same time, Standard&Poor's affirmed its 'AA' long-term and underlying rating (SPUR) on Metro's outstanding GO debt. Finally, Standard&Poor's affirmed its 'AA-' SPUR on Metro's outstanding energy system revenue bonds. The outlook on all bonds is stable. "The rating reflects our view of Metro's role as a regional economic center with moderate overall debt levels," said Standard&Poor's credit analyst Sarah Smaardyk. Officials plan to use bond proceeds to refund some outstanding bonds for a 9% estimated net