(a) In order to protect the health, safety and general welfare of the people, the Planning Commission shall reject any proposed subdivision located in an area subject to periodic flooding. If the subdivision is located in an area having poor drainage or other adverse physical characteristics, the Commission may approve the subdivision provided the subdivider agrees to perform such improvements as will render the area safe for the intended use.
(b) Flood control or storm drainage facilities shall be provided as follows:
(1) Access to flood control or storm drainage ditches and channels shall be by means of easements. Such easements shall be not less than thirty feet in width, plus the width of the ditch or channel, and an easement of this type shall be provided on one side of a flood control or storm drainage ditch, channel or similar type facility;
(2) Flood control or storm drainage easements containing underground facilities shall have a minimum width of ten feet.