(A) General provisions. In all areas of special flood hazards, the following standards are require.
(1) Anchoring.
(a) All new construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement of the structure.
(b) All manufactured homes shall be anchored to resist flotation, collapse, or lateral movement by providing over-the-top and frame ties to ground anchors. Special requirements shall be that:
1. Over-the-top ties be provided at each of the four corners of the manufactured home with two additional ties per side at intermediate locations. Manufactured homes less than 50 feet long require one additional tie per side;
2. Frame ties be provided at each corner of the home with five additional ties per side at intermediate points. Manufactured homes less than 50 feet long require additional ties per side;
3. All components of the anchoring system be capable of carrying a force of 4,800 pounds; and
4. Any additions to the manufactured home be similarly anchored.
(2) Construction materials and methods. All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage and constructed using methods and practices that minimize flood damage.
(3) Utilities.
(a) All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system.
(b) New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharge from the systems into flood waters.
(c) On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
(4) Subdivision proposals.
(a) All subdivision proposals shall be consistent with the need to minimize flood damage.
(b) All subdivision proposals shall have public utilities and facilities such as sewer, gas,
electrical, and water systems located and constructed to minimize flood damage.
(c) All subdivision proposals shall have adequate drainage provided to reduce exposure to flood damage.
(d) Base flood elevation data shall be provided for subdivision proposals and other proposed development which contain at least 50 lots or five acres, whichever is less.
(1) Residential construction. New construction and substantial improvement of any residential structure shall have the lowest floor, including the basement, elevated to or above base flood elevation.
(2) Nonresidential construction. New construction and substantial improvement for 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:
(a) Be flood-proofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water;
(b) Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and
(c) Be certified by a registered professional engineer or architect that these standards are satisfied. Such certifications shall be provided to the Board of Adjustment.
(3) Manufactured homes.
(a) Manufactured homes shall be anchored in accordance with division (A)(1) above.
(b) New manufactured home parks and manufactured home subdivisions; expansions to existing manufactured home parks and manufactured home subdivisions; existing manufactured home parks and manufactured home subdivisions or improvement of the streets, utilities, and pads equal or exceeding 50% of the value of the streets; utilities and pads before the repair, reconstruction, or improvement has been commenced; and manufactured homes not placed in a manufactured home park or manufactured home subdivision require that:
1. Stands or lots are elevated on compacted fill or on pilings so that the lowest floor of the manufactured home will be at or above the base flood level;
2. Adequate surface drainage and access for a hauler are provided; and
3. In the instance of elevation on pilings:
a. Lots are large enough to permit steps;
b. Piling foundations are placed in stable soil no more than ten feet apart;
c. Reinforcement is provided for pilings more than six feet apart; and
d. Reinforcement is provided for pilings more than six feet above the ground level.
(c) No manufactured home shall be placed on a floodway except in an existing manufactured home park or an existing manufactured home subdivision.
(4) Floodways. Located within areas of special flood hazards established in § 155.156 are areas designated as floodways. Since the floodways are extremely hazardous due to the velocity of flood water which carry debris, potential projectiles, and erosion potential, the following provisions apply.
(a) Encroachments including fill, new construction, substantial improvements, and other development are prohibited unless a technical evaluation demonstrates that encroachments shall not result in any increase in flood levels during the occurrence of the base flood discharge.
(b) If division (B)(4)(a) above is satisfied, all new construction and substantial improvements shall comply with all applicable flood hazard reduction provisions of this section.
(c) The placement of any manufactured homes is prohibited except in an existing manufactured home park or existing home subdivision.
(Ord. passed - - 2006)