SAN FRANCISCO (Standard&Poor's) Jan. 27, 2015--Standard&Poor's Ratings Services assigned its 'AA-' long-term rating to the Southern California Public Power Authority's (SCPPA, or the authority) $85 million series 2015A subordinate transmission project revenue refunding bonds and $30 million series 2015B taxable subordinate transmission project revenue refunding bonds (Southern Transmission System, or STS, project). "The 'AA-' rating reflects our view of the credit quality of the six California municipal electric systems, the unlimited step-up nature of the take-or-pay transmission service contracts, and STS' importance as the only route by which energy from the Intermountain Power Project (IPP), a coal-fired generation facility in Utah, can get to the participant cities," said Standard&Poor's credit analyst Paul Dyson. Bond