33 CFR 207.476 - The Inland Route
(a) General. The use, administration, and navigation of the lock shall be under the direction and supervision of the District Engineer, U.S. Army Engineer District, Detroit, Mich., and his authorized agents.
(b) Authority of lockmaster. The lockmaster shall be charged with the immediate control and management of the lock, and of the area set aside as the lock area, including the lock approach channels. He shall see that all laws, rules, and regulations for the use of the lock and lock area are duly complied with, to which end he is authorized to give all necessary orders and directions in accordance therewith, both to the employees of the Government and to any and every person within the limits of the lock area, whether navigating the lock or not. No one shall cause any movement of any boat, craft or other floating object in the lock or approaches except by or under the direction of the lockmaster or his assistants.
(c) Operation. The lock operating season will commence and close as determined by the district engineers, Corps of Engineers in charge of the locality, depending on conditions and the need for lockage services. Public notices will be issued announcing the opening and closing dates at least 15 days in advance of such dates.
(d) Maximum allowable dimensions of craft. (1) Overall length - 60 feet.
(2) Overall width - 16 feet.
(3) Height above water - 15 feet when upper pool is at low water datum.
(4) Draft - 6 feet when lower pool is at low water datum.
(e) Signals. (1) Craft desiring lockage in either direction shall give notice to the lock tenders, when not farther than 200 yards from the lock, by one long blast (of 10 seconds duration) followed by one short blast (of 3 seconds duration) of whistle, horn, or siren.
(2) Craft not equipped with whistle, horn, or siren may signal for lockage by use of the signal provided for this purpose located near the extreme end of the guide wall to the starboard side of the craft, both upbound and downbound.
(f) The procedures for transit of lock. (1) Stand clear of the lock while the red signal light shows.
(2) When the green signal light shows and the lock horn sounds three blasts, approach and enter the lock.
(3) Full control of the craft must be maintained while entering the lock.
(4) After entrance to the lock is complete, the craft shall be securely moored to the cleats and bitts situated on the lock wall.
(5) While moored in the lock, the operator of the craft shall maintain constant attention to the mooring lines, to provide slack or retain tautness as needed.
(6) The craft shall remain securely moored until the exit lock gate is fully open and the lock horn sounds one blast.
(7) When the exit lock gate is fully open and the lock horn has sounded one blast, the craft shall immediately leave the lock under full control of its operator.
(g) Precedence at lock. The craft arriving first at the lock shall be first to lock through; but precedence will be given to craft belonging to the United States or other local government entities, such as state, county, or municipality. Arrival posts may be established above and below the lock. Craft arriving at or opposite such posts or markers will be considered as having arrived at the locks within the meaning of this paragraph.