Whenever any street, lane, square, place or alley in the city has been improved by the construction of sidewalk or sidewalks along either or both sides thereof, the duty, burden, and expense of repair, renewal, maintenance, and removal of obstructions and snow from such sidewalk or sidewalks shall be to the property owner directly abutting upon that side of such street along which the said sidewalk has been constructed. (Ord. 322-74 § 1, 1974.)