(A) General requirements. The Planning Commission shall not recommend for approval any plat or subdivision that does not make adequate provision for storm and flood water runoff channels or basins. The local government may require the use of control methods such as retention or detention, and/or the construction of off-site drainage improvements to mitigate the impacts of the proposed developments.
(B) Location. The applicant may be required by the Planning Commission or City Commission to carry away, by pipe or open ditch, any spring or surface water that may exist, either previously to, or as a result of, the subdivision. The drainage facilities shall be located in the road right-of-way where feasible or in perpetual unobstructed easements of appropriate width, and shall be constructed in accordance with the construction standards and specifications.
(C) Upstream drainage. A culvert or other drainage facility shall in each case be large enough to accommodate potential runoff from its entire upstream drainage area, whether inside or outside the subdivision.
(D) Downstream drainage. Where it is anticipated that the additional runoff incident to the development of the subdivision will overload an existing downstream drainage facility, the Planning Commission or City Commission may withhold approval of the subdivision until provision has been made for the expansion of the downstream drainage facility.
(Ord. 66, passed 10-12-1999)