Standard&Poor's Ratings Services confirmed its 'AA-/A-1+' rating on Colorado Educational and Cultural Facilities Authority's (Clyfford Still Museum) series 2008 variable-rate demand obligation bonds, due to the bank facility being extended to Sept. 30, 2017. The long-term and short-term components of the rating are based on the rating on the letter of credit provider, Wells Fargo Bank N.A. Criteria: Methodology And Assumptions: Approach To Evaluating Letter Of Credit-Supported Debt, July 6, 2009