Section 8-622 Special Flood Hazard Areas Design Requirements
Except as may be provided elsewhere in this Division, development in an area of special flood hazard shall be designed so that:
8-622.A. Prohibited Activities. The development proscribed in Section 8-619.A. and B. shall not be allowed in the area of the special flood hazard.
8-622.B. Development. No new construction, substantial improvements or other development (including fill) shall be permitted unless it is demonstrated that the cumulative effect of the proposed development, when combined with all other existing and anticipated development, will not increase the water surface elevation of the base flood more than one foot (1') at any point within Town.
8-622.C. Setback. Any residential or nonresidential building or structure, whether fixed or mobile, designed for human occupancy or the storage of property, and occupying a space greater than one hundred (100) square feet, shall be constructed, located or improved so that any external wall is not less than fifteen feet (15') horizontally from the floodway.
8-622.D. Elevation. The lowest floor (including basement) of any residential structure shall be elevated to or above the maximum water elevation of the computed base flood. The lowest floor (including basement) of any nonresidential structure shall be elevated to or above the maximum water elevation of the computed base flood, unless such structure has been adequately floodproofed to or above the maximum water elevation. The floodproofing of nonresidential structures must be certified by a registered professional engineer or architect that the new design and methods of construction are in accordance with accepted standards of practice for meeting the provisions of this paragraph D. Such certifications shall be provided to the permit authority as set forth in Section 8-636.
8-622.E. Anchoring. All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure and capable of resisting the hydrostatic and hydrodynamic loads.
8-622.F. Manufactured Homes. Manufactured homes must be elevated and anchored to resist flotation, collapse or lateral movement and be capable of resisting the hydrostatic and hydrodynamic loads. Methods of anchoring may include, but are not limited to, use of over the top or frame ties to ground anchors. This requirement is in addition to applicable State and local anchoring requirements for resisting wind forces. Specific requirements may be:
8-622.F.1. Over the top ties shall be provided for each of the four (4) corners of the manufactured home, with two (2) additional ties per side at intermediate locations, provided that manufactured homes less than fifty feet (50') long require only one (1) additional tie per side;
8-622.F.2. Frame ties shall be located at each corner of the home with five (5) additional ties per side at intermediate points, provided that manufactured homes less than fifty feet (50') long require only four (4) additional ties per side;
8-622.F.3. All components of the anchoring system shall be capable of carrying a force of forty eight hundred (4,800) pounds;
8-622.F.4. Any additions to the manufactured home shall be similarly anchored;
8-622.F.5. Manufactured homes shall be anchored in accordance with the provisions set forth above;
8-622.F.6. Manufactured homes that are placed or substantially improved within zones AO and AE as shown on the FIRM on sites (a) Outside of a manufactured home park or subdivision, (b) In a new manufactured home park or subdivision, (c) In an expansion to an existing manufacture home park or subdivision, or (d) In an existing manufactured home park or subdivision on which a manufactured home has incurred “substantial damage” as a result of a flood, be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to or above the base flood elevation and be securely anchored to an adequately anchored foundation system to resist flotation collapse and lateral movement.
8-622.F.7. Manufactured homes to be placed or substantially improved on sites in an existing manufactured home park or subdivision that are not subject to the provisions in (6) above be elevated so that either (a) the lowest floor of the manufactured home is at or above the base flood elevation, or (b) the manufactured home chassis is supported by reinforced piers or other foundation elements that are no less than thirty six (36) inches in height above grade and be securely anchored to an adequately anchored foundation system to resist flotation, collapse, and lateral movement.
8-622.F.8. Additional Floodproofing. In the event that the flood waters in an area of special flood hazard can be expected to attain a velocity greater than three feet (3') per second (at any point where the proposed added development is to occur), additional floodproofing shall be required sufficient to withstand such greater water velocity.
8-622.F.9. Service Facilities. All new construction and substantial improvements shall be constructed with electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities located so as to prevent water from entering or accumulating within the components during conditions of flooding.
8-622.G. Recreational Vehicles. All recreational vehicles shall (a) be on site for fewer than one hundred eighty (180) consecutive days, (b) be fully licensed and ready for highway use, or (c) meet the permit requirements and elevation and anchoring requirements for manufactured homes.