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2. (f)
(g)
(h)
(i) (j)
(k)
Chassis is supported by reinforced piers or other foundation elements of at least equivalent strength that are no less than 36 inches in height above grade. Factory-built homes shall be elevated on a permanent foundation such that the lowest floor of the structure is a minimum of 1 foot above the 100-year flood level.
Utility and Sanitary Systems. 1. All new and replacement water and wastewater systems shall be designed to minimize and eliminate infiltration of floodwaters into the system as well as the discharge of effluent into floodwaters. Water and wastewater treatment facilities shall be provided with a level of flood protection equal to or greater than 3 feet above the 100-year flood elevation: A. On-site waste disposal systems shall be located or designed to avoid impairment to the system or contamination from the system during flooding. B. Utilities such as gas or electrical systems shall be located and constructed to minimize or eliminate flood damage to the system and the risk associated with such flood damaged or impaired systems. Existing or future storage of materials and equipment that are flammable, explosive or injurious to human, animal or plant life is prohibited unless elevated a minimum of 1 foot above the 100-year flood level. Other material and equipment must be either be similarly elevated or: (1) Not be subject to major flood damage and be anchored to prevent movement due to floodwaters or (2) Be readily removable from the area within the time available after flood warning. Flood control structural works such as levees, flood walls, etc. shall provide, at a minimum, protection from a 100-year flood with a minimum of 3 feet of design freeboard and shall provide for adequate interior drainage. In addition, structural flood control works shall be approved by the Iowa Department of Natural Resources. No use shall affect the capacity or conveyance of the channel or floodway of any tributary to the main stream, drainage ditch, or other drainage facility or system. Subdivisions (including factory-built home parks and subdivisions) shall be consistent with the need to minimize flood damages and shall have adequate drainage provided to reduce exposure to flood damage. Subdivision development (including the installation of public utilities) shall meet the applicable performance standards. If a subdivision proposal or other proposed new development is in a flood-prone area, any such proposals shall be reviewed to assure that all public utilities and facilities, such as sewer, gas, electrical and water systems are located and constructed to minimize or eliminate flood damage. Subdivision proposals intended for residential development shall provide all lots with a means of vehicular access that will remain dry during occurrence of the 100-year flood. Proposals for subdivisions greater than five (5) acres or fifty (50) lots (whichever is less) shall include 100-year flood elevation data for those areas located within the area of significant flood hazard. Detached Accessory Structures. 1. New detached accessory structures are prohibited in the floodway. Accessory structures shall meet the following standards if constructed or placed in the floodplain: A. Accessory structures shall not be used for human habitation. B. Accessory structures and uses shall be designed to have a low flood damage C.
potential. Accessory structures shall be placed on the building site and constructed so as to offer the minimum resistance to the flow of floodwaters.
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7/23/2013