Standard&Poor's Ratings Services assigned its 'AA' rating to Portage, Mich.'s series 2005 bonds, and affirmed its 'AA' rating and 'AA' underlying rating (SPUR) on the city's GO bonds. The 'AA' rating reflects the city's: Participation in the Kalamazoo-Battle Creek MSA; Above-average wealth and income levels, combined with below-average unemployment levels; Sound financial reserve levels; and Moderate debt levels. Considerable tax-base concentration offsets the above-mentioned strengths. The bonds are secured by the city's limited-tax GO pledge. Portage (population: 45,210) encompasses 34.5 square miles, and is located seven miles south of the City of Kalamazoo, in Kalamazoo County. Portage has a diversified economy characterized by a good mix of manufacturing, wholesale and retail trade, and service activity. Per capita retail