NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AAA' rating to the following city of Tampa, FL revenue bonds: --$86 million water and sewer systems refunding revenue bonds, series 2015. The bonds are expected to sell via negotiation the week of June 22. Bond proceeds will be used to advance refund all or a portion of outstanding series 2006 and 2007 bonds for savings and pay issuance costs. In addition, Fitch affirms the following ratings: --$227 million water and sewer revenue bonds