     
HISTORY
REVISORY SURVEY 1941--9 PIERS; SCALED AT 1:15000 FROM CHART 14974 (NAD 1902)  
 IN LAT 46-35-01.80N, LONG 90-55-05.5W. CENTRAL PIER SCALED.                  
REVISORY SURVEY 1950--9 ROCKS AWASH; SCALED AT 1:15000 FROM CHART 14974