S&P Global Ratings has assigned its 'AA' rating to Martin County, Fla.'s series 2016A and 2016B refunding revenue bonds. At the same time, S&P Global Ratings has affirmed its 'AA' long-term rating and underlying rating (SPUR) on the county's previously issued revenue bonds, though these bonds are anticipated to be fully refunded with the proceeds of the series 2016 bonds. The outlook is stable. The rating reflects our view of the system's economic and financial metrics, and specifically the application of our criteria, "Rating Methodology And Assumptions For U.S. Municipal Waterworks And Sanitary Sewer Utility Revenue Bonds," published Jan. 19, 2016, on RatingsDirect. The enterprise risk profile reflects our view of the utility's: Service area economy located in the Port