  LNM29/73 (6/27/73)-- MASSACHUSETTS-GLOUCESTER INNER HARBOR-NORTH CHANNEL; THE USACE ADVISES THAT A 90-FOOT WOODEN BARGE IS SUNK IN APPROXIMATE LOCATION LAT. 42-36-52N, LONG. 70-39-18W.  SECURED TO A DILAPIDATED WHARF ADJACENT TO THE QUINCY MARKET COLD