NY -- Standard&Poor's CreditWire 12/13/95 -- Standard&Poor's raises its rating on Coeur D'Alene Mines Corp.'s subordinated debt to single-`B'-minus from triple-`C'-plus. The outlook is stable. The upgrade follows the company's announced intention to convert its $75 million 7% subordinated debentures due 2002 to common stock. As a result, debt leverage will be reduced from about 60% to a more moderate 42%. Interest expense will be lowered by $5.3 million, reducing total interest burden by nearly one third. Further, Coeur D'Alene Mines announced that production has begun at its Fachinal, Chile, gold/silver mine ahead of schedule and under budget. Should this project achieve full production, it would provide the company with significant production diversity to its main