33 U.S.C. § 735 : US Code - Section 735: Marking pierheads in certain lakes

Search 33 U.S.C. § 735 : US Code - Section 735: Marking pierheads in certain lakes

The Commandant of the Coast Guard shall properly mark all
pierheads belonging to the United States situated on the northern
and northwestern lakes, whenever he is duly notified by the
department charged with the construction or repair of pierheads
that the construction or repair of any such pierheads has been
completed.