SAN FRANCISCO (Standard&Poor's) Feb. 19, 2010--Standard&Poor's Ratings Services assigned its 'A+' rating to Forest Grove School District No. 15, Ore.'s outstanding full faith and credit series 2010 bonds. "The rating reflects our view of the district's diverse economic base with reasonable access to the Portland metropolitan statistical area, healthy historical rise in market value and the benefit of growing assessed values in recent years, and low net overall long-term debt levels," said Standard&Poor's credit analyst Alda Mostofi. The obligation to levy property taxes within constitutional and statutory limitations secures the full faith and credit obligation of the bonds. The district is located in northwestern Washington County in Oregon, 20 miles west of Portland, and