AUSTIN, Texas--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'AA' rating on the following Padre Dam Municipal Water District, CA (the district): --$51.5 million certificates of participation (COPs) series 2009. The Rating Outlook is Stable. SECURITY The certificates are payable from a first lien on district net revenues, including revenues of the water and sewer systems (the system). KEY RATING DRIVERS HEALTHY FINANCIAL METRICS: The district's debt service coverage (DSC) is solid at over 3x f