NY -- Standard&Poor's CreditWire 4/24/98 -- Standard&Poor's assigned its double-`A'-plus rating to Rochester, Minn.'s $227.02 million revenue bonds series 1998A and B, issued for Mayo Foundation. The bonds are expected to sell April 28, 1998. (In the press release issued yesterday, the series was incorrectly stated as 1998.) Standard&Poor's affirmed its ratings on outstanding debt issued on behalf of Mayo Foundation and its controlled affiliates. The Mayo Foundation, doing business as the Mayo Clinic, is headquarted in Rochester, Minn. (In the press release issued yesterday, the amount of outstanding series 1985 revenue bonds was incorrectly stated as $809 million. The correct amount is $90 million. See list below.) The rating on Rochester's debt issued
