Building rules for flood hazard areas

Structures within the special flood hazard areas shall conform to the following: (1) Be designed and adequately anchored to prevent flotation, collapse, or lateral movement resulting from hydrodynamic and hydrostatic loads, including effects from buoyancy caused by the base flood; (2) Constructed of flood-resistant materials; (3) Constructed by methods and practices that minimize flood damage; (4) Constructed with electrical, heating, ventilation, plumbing, air conditioning, and other service facilities that are designed or located, or both, so as to prevent water from entering or accumulating within the components during conditions of flooding; (5) Provided with adequate drainage to minimize damage in accordance with the storm drainage standards of the department; (6) For new or replacement potable water system and facilities, be designed to minimize or eliminate infiltration of flood waters into the systems; (7) For new or replacement sanitary sewer system and waste disposal system, be designed, located, and constructed so as to minimize impairment to them or contamination from them during and after flooding by the base flood; (8) Manufactured homes. Manufactured homes that are placed or substantially improved within special flood hazard areas that are not coastal high hazard areas shall 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. Manufactured homes that are placed or substantially improved within coastal high hazard areas shall meet the requirements of § 21A-1.9 ; (9) Recreational vehicles. Recreational vehicles placed within a special flood hazard area shall either: (A) Be on site for fewer than 30 consecutive days; (B) Be fully licensed and ready for highway use (a recreational vehicle is ready for highway use if it is on wheels or a jacking system, is attached to the site only by a quick disconnect type utilities and security device, and has no permanently attached additions); or (C) Meet the requirements for manufactured homes under subsection (8). (10) A structure that straddles two or more special flood hazard areas shall comply with the standards of the flood hazard area that is considered to have the most stringent or restrictive standards.