(A) The approval of a preliminary plat by the City Council only constitutes acceptance of the design as a basis for the preparation of the final plat by the owners or subdividers. Subsequent approval by appropriate officials having jurisdiction will be required of the engineering proposals pertaining to water supplies, storm drainage, sewage disposal, sidewalks, grading, gradients and roadway widths, and the surfacing of streets prior to the approval of the final plat by the city.
(B) No plan will be approved for a subdivision which includes any area subject to periodic flooding or which contains extremely poor drainage facilities which would make adequate drainage of the streets and lots impossible, unless the subdivider agrees to make improvements which will, in the opinion of the City Engineer, make the area completely safe for occupancy and provide adequate street and lot drainage and is not in conflict with the city's flood plain regulations.
('72 Code, § 345:20)