Secondary and Cumulative Impacts Master Management Plan - 2014

Article 14 Flood Hazard Areas 14-18 Special Flood Hazard Area Standards

(B) new nonresidential construction or major repairs of any commercial, industrial or other nonresidential structure must have the lowest floor, including basement, elevated to or above the level of the regulatory flood protection elevation (RFPE); (C) electrical, heating, ventilation, plumbing, and air-conditioning equipment and other service facilities must be designed and/or located to prevent water from entering or accumulating within the components during conditions of flooding; and (D) for all new construction, major repairs, and substantial improvements, fully enclosed areas below the lowest floor that are subject to flooding must be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a licensed professional engineer or architect or must meet or exceed the following minimum criteria: A minimum of 2 openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding must be provided. The bottom of all openings must be no higher than one foot above grade. Openings may be equipped with screens, louvers, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters. (B) be fully licensed and ready for highway use, that is, is on its wheels or jacking system, is attached to the site only by quick-disconnect-type utilities and security devices, and has no permanently attached additions; or (C) meet the permit requirements of Sec. 14-14 and the elevation and anchoring requirements for mobile homes in subparagraph 14-18-5(A) below. 14-18-5 In all areas of special flood hazard, the following provisions apply for mobile homes: (A) no mobile home may be placed in a floodway or non-encroachment area except in a mobile home park existing prior to January 17, 1983; (B) all mobile homes and accessory structures must be anchored to prevent floatation, collapse, or lateral movement by providing over-the-top and frame ties to ground anchors. Mobile homes must be anchored in accordance with the requirements in the “State of North Carolina Regulations for Manufactured Homes,” as adopted, and subsequently amended, by the North Carolina Commissioner of Insurance. Any additions to mobile homes must be similarly anchored; (C) for any mobile home to be placed or substantially improved on a site located within a new mobile home park, within an expansion to an existing mobile home park, within a mobile home park that has incurred substantial damage as a result of a flood, or outside of a mobile home park: (1) the mobile home must be elevated on a permanent foundation so that its lowest floor is at or above the base flood elevation; (2) the mobile home must be securely anchored to an adequately anchored foundation system to resist flotation, collapse, and lateral movement; 14-18-4 Any recreational vehicle placed on a site must either: (A) be on the site for fewer than 180 consecutive days;

Wake County Unified Development Code 14-14