33 C.F.R. § 160.109
(a) To prevent damage to, or the destruction of, any bridge or other structure on or in the navigable waters of the United States, or any land structure or shore area immediately adjacent to such waters, and to protect the navigable waters and the resources therein from harm resulting from vessel or structure damage, destruction, or loss, each District Commander or Captain of the Port may:
[CGD 79-026, 48 FR 35404, Aug. 4, 1983, as amended by USCG-1998-3799, 63 FR 35531, June 30, 1998]