No excavation or opening made in streets, alleys or public places shall remain open for a longer period of time than is absolutely necessary to do the work prescribed in the permit granted for such excavating, and the person, partnership, or corporation making such excavation or opening shall refill same without delay, with such material as the Director of Public Service shall direct, and to the satisfaction of the Director, and shall completely fill such opening or excavation to the surface of the pavement and shall put all such openings and excavations in a condition safe for public travel upon such street or public way.
(1964 Code Sec. 95.09)