NEW YORK (Standard&Poor's) Feb. 25, 2002—Standard&Poor's today assigned its double-'A'-plus rating to Denver City and County, Colo.'s $52.5 million art museum bonds series 2002 dated March 1, 2002, due Aug. 1, 2017. The bonds are scheduled to sell on Feb. 26, 2002. At the same time, Standard&Poor's affirmed its double-'A'-plus rating on outstanding GO debt issued by the city and county and by the Denver Board of Water Commissioners. The outlook is stable. The rating reflects: -- A strong and diverse economy, -- Above-average wealth and income levels, -- Moderately low debt, and -- Historically high fund balances and conservative budgeting practices. These factors are offset slightly by state constitutional limitations on revenues. A