(A) Within the regulated flood hazard area, subdivisions including new or expansion of existing manufactured home parks must be designed to meet the following criteria:
(1) The base flood elevations and boundary of the regulated flood hazard area must be determined and considered during lot layout and building location design;
(2) Locations for future structures and development must be reasonably safe from flooding (44 C.F.R. § 60.3(a)(4));
(3) Adequate surface water drainage must be provided to reduce exposure to flood hazards (44 C.F.R. § 60.3(a)(4)(iii));
(4) Public utilities and facilities, such as sewer, gas, electrical and water systems must be located and constructed to minimize or eliminate flood damage; and (44 C.F.R. § 60.3(a)(4)(ii)); and
(5) Floodplain permits must be obtained according to these regulations before development occurs that is within the regulated flood hazard area (44 C.F.R. § 60.3(b)).
(B) Example for informational purposes only: the national flood insurance program (NFIP) standard for community floodplain management ordinances specifies that the local government is to consider flood hazards when reviewing and approving subdivisions within the special flood hazard area. Floodplain administrators should check their subdivision ordinances to ensure flood hazards outside of regulated flood hazard areas are addressed in development proposals. For example, the state model subdivision regulations suggests that for any portion of a proposed subdivision that is within 2,000 horizontal feet and 20 vertical feet of a stream draining an area of 25 square miles or more, where no official floodplain studies of the stream have been made, the subdivider may be required to conduct a flood hazard evaluation study. The Montana Department of Natural Resources and Conservation may, if requested, review the flood hazard analysis on the merit of its technical adequacy and make a recommendation back to the Floodplain Administrator. A technical review by DNRC is not intended to be a formal designation of a floodplain or floodway pursuant to MCA §§ 76-5-201 et seq. for floodplain management regulatory purposes, unless specifically requested and subsequently adopted by DNRC.
(Prior Code, § 11.06.010.160) (Ord. 6, passed 3-16-1981; Ord. 2021-15, passed 12-20-2021)