No person shall obstruct in any manner any street drainage ditch, gutter, drain or culvert so as to prevent the free flow of water therein; provided, that this shall not prevent the erection of footbridges over the ditches, gutters and drains along streets which have not been curbed and the gutters and drains along paving, of the width of three feet for pedestrian crossings to sidewalks leading to doorways, and bridges of the width of ten feet for vehicle crossings into lots where such crossings are required. Such bridges shall be so constructed as not to prevent the flow of water to or in gutters, ditches and drains.
(Code 1982, § 10-20; Ord. No. 92-36, § 1, 6-11-1992)