(a) General Standards.
In all areas of special flood hazards the following standards shall apply:
(1) Anchoring.
A. All new construction and substantial improvements shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads including the effects of buoyancy.
B. All manufactured homes not otherwise regulated by the Ohio Revised Code pertaining to manufactured home parks shall be anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads including the effects of buoyancy. Methods of anchoring may include, but are not to be limited to, use of over-the-top or frame ties to ground anchors.
(2) Construction materials and methods.
A. All new construction and substantial improvements shall be constructed with materials resistant to flood damage.
B. All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damage.
C. All new construction and substantial improvements shall be constructed with electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
(3) Utilities.
A. All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the systems; and
B. New and replacement sanitary sewerage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharge from the systems into flood waters; and
C. Individual wastewater treatment systems shall be located to avoid impairment to them or contamination from them during flooding.
(4) Subdivision Proposals.
The Zoning Administrator shall review all subdivision proposals to insure they meet the following standards:
A. All subdivision proposals, including manufactured home subdivisions, shall be consistent with the need to minimize flood damage;
B. All subdivision proposals, including manufactured home subdivisions, 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, including manufactured home subdivisions, shall have adequate drainage provided to reduce exposure to flood damage; and
D. Base flood elevation data shall be provided for subdivision proposals, including manufactured home subdivisions, and other proposed developments which contain at least 50 lots or five acres (whichever is less).
(b) Specific Standards.
In all areas of special flood hazards where base flood elevation data have been provided as set forth in Section 1327.03 (b)(3), the following standards apply:
(1) Residential construction.
New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to or above the base flood elevation.
(2) Nonresidential construction.
New construction and substantial improvement of 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 floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water; and
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 the design and methods of construction are in accordance with accepted standards of practice for meeting the standards of this subsection. Such certification shall be provided to the Building and Zoning Administrators as set forth in Section 1327.03(a)(1)C.
(3) Manufactured homes.
The following standards shall apply to all new and substantially improved manufactured homes not subject to the manufactured home requirements of Ohio R.C. 3733.01.
A. Manufactured homes shall be anchored in accordance with subsection (a)(1) hereof; and
B. Manufactured homes shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is at or above the base flood elevation.
(4) Enclosures below base flood elevation.
This standard applies to all new and substantially improved residential and nonresidential structures which are elevated to or above base flood elevation using pilings, columns or posts or which contain a crawl space. These structures may enclose the area below base flood elevation provided that the enclosed areas are designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters.
(5) Floodways.
Encroachments into the floodway 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.
(Ord. 1966. Passed 10-6-87)
(Ord. 1966. Passed 10-6-87)