Standard&Poor's Ratings Services raised its Standard&Poor's underlying rating (SPUR) on Cedar Hill, Texas' water and sewer system revenue bonds outstanding to 'A-' SPUR from 'BBB+' SPUR based on: Inclusion in the diverse Dallas-Fort Worth MSA economy, Growing customer base, Improved debt service coverage and system liquidity, and Implementation of a plan to adequately fund an escalating liability to the U.S. Army Corps of Engineers for the Joe Pool Lake project. Offsetting rating factors include the system's: High combined water and sewer rates, and Additional burden of funding Cedar Hill's portion of the Joe Pool Lake project through cash transfers from the water and sewer utility. Standard&Poor's also assigned its 'A-' rating to the city'