...S&P Global Ratings assigned its '##' rating to Chester County Health and Education Facilities Authority, Pa.'s $131 million series 2020A revenue bonds issued for Main Line Health System (MLH). At the same time we affirmed our '##' rating on bonds issued by various authorities for MLH. Main Line Health System is the parent company of Main Line Health. The outlook is stable. Bond proceeds in addition to an anticipated premium will partially finance a $326 million renovation at MLH's Riddle Hospital in Media, Pa. Additional funding is expected to come from $11 million of philanthropy and the system's unrestricted reserves. This multi-pronged approach to capital spending is consistent with the way MLH has financed projects in the past. The project will construct a five story addition housing surgery, maternity services including a new eight-bed neonatal intensive care unit, 92 private adult patient rooms, and several diagnostic departments. Once the expansion and renovation of existing space...