Standard&Poor's Ratings Services assigned its 'A-1+' short-term rating to East Bay Municipal Utility District (EBMUD), Calif.'s $163.03 million series 2009A-1 and $163.03 million series 2009A-2 water system subordinated water revenue refunding bonds. At the same time, we assigned our 'AAA' rating to the district's $200 million series 2010A water system subordinated revenue refunding bonds and its $400 million water system subordinate revenue series 2010B (taxable) Build America Bonds (BABs). We concurrently affirmed our 'AAA' long-term rating and underlying rating (SPUR) on EBMUD's existing water system subordinated water revenue refunding bonds. Finally, we affirmed our 'A-1+' rating on the district's extendible commercial paper (ECP) notes (water series). The outlook on all the long-term ratings is stable. A subordinate pledge