Standard&Poor's Ratings Services assigned its 'AA' standard long-term rating, and stable outlook, to Trinity River Authority, Texas' series 2008 central regional wastewater system improvement revenue bonds based on the member cities' general creditworthiness and financial stability, as well as their strong service area economies and utility systems. Standard&Poor's also affirmed its 'AA' standard long-term rating and Standard&Poor's underlying rating (SPUR), with a stable outlook, on the authority's previously issued debt. The participant cities' water and sewer systems collectively exhibit: Margins that are able to generate sound coverage of all on-balance-sheet and off-balance-sheet obligations, including those to the authority; Strong liquidity; and Moderate retail service rates, coupled with a demonstrated willingness to adjust rates, as