Section 43. If the cost and expenses of removing a vessel or other obstruction as aforesaid are not paid or repaid by some owner or other person liable therefor within ten days after such removal has been completed, the department may sell such vessel or other obstruction, or the materials and appurtenances thereof, at public or private sale, and the net proceeds of such sale shall be paid to the commonwealth and deducted from the amount to be repaid or recovered as provided for in the preceding section.