Mississippi Administrative Code › Title 33 - Public Health - Local Governments And Rural Water Systems Improvements Board › Part 208 - Flood Damage Prevention Regulation › Chapter 5 - Provisions for Flood Hazard Reduction › Rule 33-208-5.5 - Standards for Subdivision Proposals and Other Proposed Development

Current through June 25, 2024
(1) All subdivision proposals shall be
				consistent with the need to minimize flood damage;
(2) All subdivision proposals shall have
				public utilities and facilities such as sewer, gas, electrical and water
				systems located and constructed to minimize flood damage;
(3) All subdivision proposals shall have
				adequate drainage provided to reduce exposure to flood hazards, and;
(4) Base flood elevation data shall be
				provided for all new subdivision proposals and other proposed development
				(including manufactured home parks and subdivisions), which is greater than
				fifty lots or five acres, whichever is the lesser.
(5) All subdivision and other development
				proposals which involve disturbing more than 1000 square feet of land shall
				include a stormwater management plan which is designed to limit peak runoff
				from the site to predevelopment levels for the one, ten, and 100-year rainfall
				event. These plans shall be designed to limit adverse impacts to downstream
				channels and floodplains. Single residential lots involving less than one acre
				of land disturbance are not subject to this regulation.
(6) All preliminary plans for platted
				subdivisions shall identify the flood hazard area and the elevation of the base
				flood.
(7) All final subdivision
				plats will provide the boundary of the special flood hazard area, the floodway
				boundary, and the base flood elevations.
(8) In platted subdivisions, all proposed
				lots or parcels that will be future building sites shall have a minimum
				buildable area outside the natural (non-filled) 1% chance annual floodplain.
				The buildable area shall be large enough to accommodate any primary structure
				and associated structures such as sheds, barns, swimming pools, detached
				garages, on-site sewage disposal systems, and water supply wells, where
				applicable.
(9) Approval shall not
				be given for streets within a subdivision, which would be subject to flooding
				in the base flood. All street surfaces must be located at or above the base
				flood elevation.
(10) Where only a
				small portion of the subdivision lot or lots is in an A zone Special Flood
				Hazard Area inundated by one percent chance flood with no base flood elevations
				determined and there is sufficient ground slope on the site to avoid possible
				flooding of structures in X Zones (unshaded) determined to be outside 0.2
				chance flood floodplain. The Floodplain Administrator may waive the requirement
				for a study to determine the base flood elevations.
(11) In order for the Floodplain
				Administrator to consider waiving the requirement of Section F (4) the
				applicant must provide an accurate topographic data and map for the lot or lots
				in question (certified by a licensed land surveyor and/or professional civil
				engineer) indicating that each lot in a new subdivision is on natural high
				ground, out of the regulatory floodplain.
(12) Each proposed parcel must have a
				designated buildable pad or site above the one percent chance floodplain. The
				distance of the buildable pad or site above the one percent chance floodplain
				shall depend on the slope of the ground and in accordance with the following
				table:
Distance in feet from A Zone [one
								percent chance floodplain]
Minimum Slope from A Zone [one
								percent floodplain to ground level at pad]
20
5%
30
3.33%
40
2.50%
50
2.0%
60
1.67%
70
1.43%
80
1.25%
90
1,11%
100
1.9%
Residential and non-residential structures lowest floor
				  elevation also must be elevated 1.5 feet above the ground level on the
				  buildable pad or site.
(13)
				The subdivider/applicant must comply with the following:
a.) File restrictive covenants on the lot or
				lots prohibiting construction within the designated special flood hazard area
				and requirement for lowest floor elevation.
b.) Place a statement on the face of the
				final plat prohibiting construction in the designated area of special flood
				hazard.