Standard&Poor's Ratings Services assigned its 'AAA' rating, and stable outlook, to Colorado Water Resources and Power Development Authority's series 2008A drinking water revenue bonds. The rating reflects the state revolving fund program's ability to meet Standard&Poor's default tolerance criteria for an 'AAA' rated program based on cash flow tests for the combined drinking water and clean water programs. At the same time, Standard&Poor's affirmed its 'AAA' rating, and stable outlook, on the authority's preexisting debt. The rating also reflects: Surplus matching accounts that provide cross-collateralization between the authority's drinking water and water pollution control loans; Debt service reserves dedicated to the borrowers' loans funded at a minimum of maximum annual debt service (MADS), coupled