In all areas of special flood hazard, the following provisions are required:

(1) All new construction and substantial improvements shall be anchored to prevent floatation, collapse or lateral movement of the structure.

(2) All mobile homes shall be anchored to resist floatation, collapse or lateral movement by providing over-the-top and frame ties to ground anchors. Specific requirements shall be that:

(i) over-the-top ties be provided at each of the four (4) corners of the mobile homes with two additional ties per side at intermediate locations and mobile homes less than fifty (50) feet long requiring one additional tie per side;

(ii) frame ties be provided at each corner of the home with five additional ties per side at intermediate points and mobile homes less than fifty (50) feet long requiring four additional ties per side;

(iii) all components of the anchoring system be capable of carrying a force of 4,800 pounds;

(iv) an addition to a mobile home be similarly anchored

(1) All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage.

(2) All new construction or substantial improvements shall be constructed by methods and practices that minimize flood damage.

(1) All new or replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system;

(2) New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the system and discharges from the system into flood waters;

(3) On-site waste disposal systems shall be located to avoid impairment in them or contamination from them during flooding.

(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 damage.

(4) Base flood elevation data shall be provided for subdivision proposals and other proposed development which contain at least fifty (50) lots or five acres, whichever is less.

In all areas of special flood hazards where base flood elevation data have been provided as set forth in Section 2.2, Basis for Establishing the Areas of Special Flood Hazard, or in Section 3.32, Use of Other Base Flood Data, the following standards are required:

New construction or substantial improvement of any residential structure shall have the lowest floor including basement elevated to or above base flood elevation.

New construction and substantial improvement of any commercial, industrial or other nonresidential structure shall either have the lowest floor, including basement, elevated to the level of the base flood elevation; or together with attendant utility and sanitary facilities, shall:

(1) be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;

(2) have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and

(3) be certified by a registered professional engineer or architect that the standards of this subsection are satisfied. Such certifications shall be provided to the Official as set forth in Section 3.33(2).

(1) Mobile homes shall be anchored in accordance with Section 4.11(2).

(2) For new mobile home parks and mobile home subdivisions; for expansions to existing mobile home parks and mobile home subdivisions; for existing mobile home parks and mobile home subdivisions where the repair, reconstruction or improvement of the streets, utilities and pads equals or exceeds 50 percent of value of the streets, utilities and pads before the repair, reconstruction, or improvement has commenced; and for mobile homes not placed in a mobile home park or mobile home subdivision, require that:

(i) stands or lots are elevated on compacted fill or on pilings so that the lowest floor of the mobile home will be at or above the base flood level;

(ii) adequate surface drainage and access for a hauler are provided; and

(iii) in the instance of elevation on Pilings, that: lots are large enough to permit steps, piling foundations are placed in stable soil no more than ten feet apart, and reinforcement is provided for pilings more than six feet above the ground level.

(3) No mobile home shall be placed in a floodway, except in an existing mobile home park or an existing mobile home subdivision.

Located within areas of special flood hazard established in Section 2.2 are areas designated as floodways. Since the floodway is an extremely hazardous area due to the velocity of flood waters which carry debris, potential projectiles, and erosion potential, the following provisions apply:

(1) Prohibit encroachments, including fill, new construction, substantial improvements, and other development unless a technical evaluation demonstrates that encroachments shall not result in any increase in flood levels during the occurrence of the base flood discharge.

(2) If Section 4.3(l) is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of Section 4.0, Provisions For Flood Hazard Reduction.

(3) Prohibit the placement of any mobile homes, except in an existing mobile home park or existing mobile home subdivision.

(4) In all areas of special flood hazard in which base flood elevation data has been provided and no floodway has been designated, the cumulative effect of any proposed development, when combined with all other existing and anticipated development, shall not increase the water surface elevation of the base flood more than two-tenths of a foot at any point.

**Webmasters Note: This section has been added as per Amendment No. 97-11.