Standard&Poor's Ratings Services assigned its 'AA+' long-term rating to King County, Wash.'s $264.4 million 2016 series A sewer refunding revenue bonds, issued for the county's sewer system. At the same time, Standard&Poor's affirmed its: 'AA+' long-term rating and underlying rating (SPUR) on the county's existing parity bonds; 'AA' SPUR on the county's existing junior-lien bonds; 'AAA/A-1' rating on the county's series 2001AB, variable-rate bonds; and 'AAA/A-1+' rating on the county's series 2010AB multi-modal bonds, reflecting the application of our joint support criteria. The outlook, where applicable, is stable. The ratings reflect our view of the county's: Role as the major wholesale wastewater treatment provider in the region; Broad and diverse economic base with high median household