NEW YORK (Standard&Poor's) Oct. 20, 2010--Standard&Poor's Ratings Services has assigned its 'AA-' rating to the City of San Antonio, Texas electric and gas systems $500 million junior-lien revenue bonds, taxable series 2010A and B. At the same time, Standard&Poor's affirmed its 'AA' long-term rating on San Antonio's $4.1 billion senior-lien electric and gas system revenue and refunding bonds, its 'AA-/A-1+' rating on the $397.6 million electric and gas systems junior lien revenue bonds, and its 'A-1+' short-term rating on the tax-exempt commercial paper (CP) program. The outlook is stable. The rating reflects what we view as several strengths of San Antonio's electric and gas utility, known as CPS Energy. "We believe credit strengths include