...S&P Global Ratings assigned its '###' rating and stable outlook to Austin, Texas' series 2016 public improvement and refunding bonds, series 2016 certificates of obligation, series 2016 public property finance contractual obligations, series 2016 taxable public improvement bonds, and series 2016 taxable certificates of obligation. At the same time, S&P Global Ratings affirmed its '###' rating, with a stable outlook, on the city's existing general obligation (GO) debt and certificates of obligation. S&P Global Ratings also affirmed its '###' rating, with a stable outlook, on Northwest Austin Municipal Utility District No. 1's GO debt, issued for the city. In addition, S&P Global Ratings affirmed its '##+' rating, with a stable outlook, on Mueller Local Government Corp.'s appropriation debt, supported by the city. The certificates of obligation, public improvement bonds, and public property finance contractual obligations are payable from an ad valorem tax, levied within the limits prescribed...