AUSTIN, Texas--(BUSINESS WIRE)--Fitch Ratings has assigned an 'AAA' rating to the following bonds issued by the Texas Water Development Board (TWDB): --Approximately $860.6 million State Water Implementation Revenue Fund for Texas Revenue Bonds series 2015A (Master Trust); --Approximately $15.6 million State Water Implementation Revenue Fund for Texas Revenue Bonds taxable series 2015B (Master Trust). The Rating Outlook is Stable. Bond proceeds will be used to provide financing to governmental