Any tug, propeller or steamboat having in tow any raft of lumber, logs or timber, and making or entering the government breakwater, shall tow such raft to such place in the water, so as not to obstruct or interfere with any vessel, craft or float desiring to enter and anchor in the breakwater. The Harbor Master shall cause the removal of any such raft when the same so obstructs any vessel or craft and the cost of such removal shall be chargeable upon the property so removed, and may be collected of the owner thereof.