Standard&Poor's Ratings Services confirmed its 'AA-/A-1+' rating on Iowa Finance Authority's series 2006 variable-rate demand educational facilities revenue bonds, issued for Wahlert High School, due to the bank facility being extended to Sept. 30, 2016. The long-term and short-term components of the rating are based on the ratings on the letter of credit provider, U.S. Bank National Assn. Criteria: Methodology And Assumptions: Approach To Evaluating Letter Of Credit-Supported Debt, Feb. 20, 2015