It shall be the duty of the occupant of any premises within the city limits, or in case the same are unoccupied then the owner or his agent, to keep the sidewalk in front of said premises unobstructed, and such occupant, owner or agent shall, with all reasonable dispatch, remove snow, ice, slush, mud or other impediment to allow safe and convenient foot travel and prevent the continuance and accumulation of the same. (Ord. 29, 11-2-1927)