NY -- Standard&Poor's CreditWire 12/7/98 – Standard&Poor's today assigned its single-'A'-plus underlying rating (SPUR) to San Francisco Airport Commission, Calif.'s $125 million airport second series revenue bonds dated Dec. 1, 1998 due May 1, 2029. The rating reflects the following strengths: -- Greater certainty associated with completion of Near Term Master Plan (NTMP) project budgets, -- Demonstrated and expected solid economic underpinnings and positive traffic trends that slowed in fiscal 1998, and -- Strong financial performance and debt service coverage. Offsetting credit risks include: --ýA large and ambitious debt-financed capital program totaling $2.8 billion that will result in higher costs and a substantially leveraged facility when combined with future anticipated projects, -- Uncertainties associated with the