Standard&Poor's Ratings Services assigned its 'AAA' long-term rating, and stable outlook, to Colorado Water Resources and Power Development Authority's series 20010A clean water revenue bonds (state revolving fund pool). At the same time, Standard&Poor's affirmed its 'AAA' long-term rating, with stable outlook, on the authority's previously issued senior-lien debt. The assigned rating reflects what we consider the state revolving fund program's ability to meet Standard&Poor's default tolerance criteria for a 'AAA' rated program based on cash flow tests for the authority's combined drinking water and clean water programs. The rating also reflects what we view as: Surplus matching accounts that provide cross-collateralization between the authority's drinking water and water pollution control loans; Surplus funds