In making excavations or making improvements in or to any street, sidewalk, alley or other public grounds, all material or earth removed and new material necessary for repairs or for new work must be handled in a manner and placed where it will cause the least possible inconvenience to the public. In no case shall any of such material or earth be scattered over the surface of the pavement. At all times a clear and unobstructed waterway shall be maintained along the gutter, the cross section of which shall be not less than one square foot in area. (Ord. 861 §1, 1998)