Whenever any public street within this Village
is in the process of construction or whenever any excavation is made
in such street, it shall be the duty of the person performing the
work to place and maintain such sufficient guards, including lights
in the nighttime, about such construction or excavation as to secure
public safety until said street is ready for public use, and such
guards and lights shall in all respects, including kind, manner and
location, be subject to approval of the Mayor or such other Village
official or employee designated by the Mayor.