A.   Storm Sewers, Drains: It is unlawful for any person, firm or corporation to obstruct any street, sidewalk or alley within the city by placing any approach driveway or other obstruction or substance whatever that will obstruct or prevent the natural flow of water into the storm sewers or drains or dam the same so as to back any water upon the streets, alleys, sidewalks or gutter.
   B.   Obstructions A Nuisance: Any such obstruction is hereby declared to be a nuisance; and the street department may abate it at any time, either with or without notice to owners or occupants of abutting property owners. (1985 Code § 14-209)