The 'AA+' rating on Polk County, Iowa's series 2006A and 2006B GO bonds reflects the following credit factors: Participation in the strong and diverse Des Moines, Iowa MSA economy; Economic vitality and growth stemming from considerable public and private investment in substantial capital projects; A stable financial position with strong management; and A moderate overall net debt level with manageable capital needs. The positive outlook reflects the expectation that the county will be able to successfully implement its recently adopted long-term financial planning tools. Payment of debt service on the series 2006A and 2006B bonds is secured with the county's unlimited-tax GO pledge. The proceeds of the bonds will be used for various infrastructure and equipment purchases. Polk County forms