Unknown Wreck 115637

General Comments

HISTORY CL483/00--USACE (BILL KAVANAUGH, 918-318-8328) TO CGD1 (MARY SWANSON 617-223-8356) 3/20/00; WHILE PERFORMING A HYDROGRAPHIC SURVEY OF THE BOSTON HARBOR, BROAD SOUND, NORTH CHANNEL, AN OBSTRUCTION TO NAVIGATION WAS IDENTIFIED. DEPTHS OF 34.9 AND 35.1 FEET BELOW MLLW WERE RECORDED IN THE AUTHORIZED 40-FOOT FEDERAL CHANNEL AT APPROX. POS. LAT. 42-22-02.1N, LONG. 70-55-01.9W (NAD83). THE OBJECT EXTENDS ABOUT 8 FEET ABOVE THE SURROUNDING CHANNEL BOTTOM. THE POSITION IS APPROX. 1,150 FEET SEAWARD OF BUOY FLASHING GREEN #1 AND ABOUT 100 FEET NORTHWEST OF THE SOUTH CHANNEL LIMIT. IT IS REQUESTED THAT A SUITABLE NOTICE TO MARINERS BE ISSUED. LNM12/00-- ADD 35 FEET AT 42-22-02.100N, 70-55-01.900W. F00465/00-- (NO PROJECT NO. OR INSTRUCTIONS); ITEM LOCATED BY SIDE SCAN SONAR SEARCH. LD ACQUIRED WITH MULTI-BEAM SONAR OF 36 FEET. DIVERS OBTAINED A LD OF 34 FEET IN LAT. 42-22-02..44N, LONG. 70-55-02.55W. DIVERS DESCRIBE AN OLD METAL BARGE ORIENTED NW-SE APPROX. 50 METERS LONG. THE SOUTHEASTERN EXTENT OF THE BARGE WAS PARTIALLY COLLAPSED. LD TAKEN ON THE NORTHEAST CORNER OF WRECK. EVALUATOR RECOMMENDS CHARTING A 34WK AS SURVEYED. (UP 11/7/00, SJV) H10991/00-- OPR-A397-WH; 200% SIDE SCAN SONAR SEARCH LOCATED WRECK. SWMB LD OF 33 FEET (10.27 METERS) OBTAINED IN LAT. 42-22-02.41N, LONG. 70-55-02.56W. DIVE OPS CONFIRMED DESCRIPTION AS A BARGE. EVALUATOR RECOMMENDS DELETING CHARTED 34 WK AND CHARTING A 33 WK AS SURVEYED. (UP 1/8/03, SJV) H10994/01-- OPR-A397-WH; SIDE SCAN SONAR LOCATED WRECK AS CHARTED FROM H10991/00, ABOVE. EVALUATOR RECOMMENDS RETAINING 33WK AS CHARTED FROM H10991/01. (UP 9/1/04, SJV) DESCRIPTION **** USACE, CONCORD, MA (BILL KAVANAUGH; TEL: 978-318-8328) 5/23/00; REPORTS 35-FOOT SOUNDING RECORDED ON A SINGLE BEAM FATHO. TRACE IN CHARTED DEPTH OF 40 FEET. (ENT 5/23/00, SJV)