CGD8, LNM 20/76, 05/19/1976; REPORTS THE 210 FOOT HYDRAULIC CUTTER DREDGE "PHILIDELPHIA" HAS BEEN REPORTED SUNK IN EUGENE ISLAND BLOCE 172 IN POSITION LAT. 28/46/30 N, LON. 091/36/48 W,  IN 65 FEET OF WATER. A RED LIGHTED BYOY, SHOWING FLOASHIN WHITE EVE