Standard&Poor's Ratings Services assigned its 'AA-' standard long-term rating, and stable outlook, to Cedar Hill, Texas' series 2008 combination tax and revenue certificates of obligation and affirmed its 'AA-' standard long-term rating and Standard&Poor's underlying rating (SPUR), with a stable outlook, on the city's GO debt. The ratings reflect the city's: Continued healthy economic expansion; Consistently strong financial position and performance; Participation in the diverse Dallas-Fort Worth MSA economy with direct transportation access to the greater Dallas, Texas labor market; and Above-average income and wealth levels. These strengths are offset, in part, by the city's: High overall debt levels, and Further capital needs. The city's full faith and credit pledge secures the certificates. Officials will use