HISTORY
CL150/67--COE; TWO ROCKS WERE LOCATED 967 FT AND 1382 FT DOWNSTREAM FROM THE  
 INTERSECTION OF MARCUS HOOK AND CHESTER RANGES AND 125 TO 150 FT EAST OF THE 
 SHIP CHANNEL. COE SURVEY INDICATES A 34 FT LD OVER THE NORTHERN ROCK.        
BP844