NEW YORK (Standard&Poor's CreditWire) Nov. 9, 1999--Standard&Poor's today assigned its triple-'B'-plus rating to Cedar Hill, Texas' $2.77 million waterworks and sewer system revenue bonds series 1999A due April 1, 2019. In addition, Standard&Poor's affirmed its triple-'B'-plus rating on Cedar Hill's outstanding series 1986 and series 1999 revenue bonds. The rating reflects the security of the combined system's net revenue pledge. Credit factors include: ý-- Location near the rapidly growing Dallas-Fort Worth economic base, ý-- High combined water and sewer rates, ý-- Adequate system financial operations, ý-- A low but increasing debt burden, and ý-- The additional burden of funding Cedar Hill's portion of the Joe Pool Lake project. Cedar Hill is a residential community