12:6-5.  General powers and duties Such harbor masters shall have authority, within the limits fixed by the board at the time of the appointment:

a.  To supervise the use of the inland waterways in such locality;

b.  To prevent permanent anchorage or obstruction of any character from being located therein;

c.  To remove all temporary obstructions therefrom;  and

d.  In all other ways to protect the interests of the state and the public in the waterway by keeping it free from obstruction and open to navigation.