33 C.F.R. § 110.84
An area extending northwesterly between Black Rock Channel and Bird Island Pier opposite the foot of Porter Avenue, bounded as follows: Beginning at Triangulation Marker "N-5" on Bird Island Pier; thence southeasterly along the pier a distance of approximately 745 feet; thence 60°52' true, approximately 300 feet to a point 50 feet westerly of the westerly limit of Black Rock Channel; thence northwesterly along an arc of a circle parallel to and 50 feet westerly of the westerly limit of the channel to a point approximately 360 feet southerly of Bird Island Pier Light No. 17; thence 276°20' true, approximately 135 feet to Bird Island Pier; thence southwesterly and southerly along the pier a distance of approximately 1,355 feet to the point of beginning.
33 C.F.R. §110.84