SAN FRANCISCO (Standard&Poor's) Oct. 15, 2010--Standard&Poor's Ratings Services assigned its 'A' long-term rating to the City of Tacoma, Wash.'s $4.6 million series 2010 convention center and parking revenue refunding bonds. Additionally, Standard&Poor's affirmed its 'A' long-term rating on the city's outstanding parking system bonds. "The 'A' long-term rating on the city's series 2010 bonds reflects the city's diverse pledge of revenues, the city's good unrestricted cash position, and the city manager's flexibility to adjust rates based on a market-based methodology without additional approval by the city council," said Standard&Poor's credit analyst Mary Ellen Wriedt. The parking system includes seven parking garages with approximately 2,200 revenue-producing stalls, two surface lots with approximately 100