The Director of Public Works, in reviewing all applications for new construction, substantial improvements, prefabricated buildings, placement of manufactured homes, and other development(s) (as defined in § 152.11) will:
(A) Obtain, review, and reasonably utilize, if available any regulatory flood elevation data from federal, state, or other sources, until the other data is provided by the Federal Insurance Administration in a Flood Insurance Study; and require within areas designated as Zone A on the official map that the following performance standards be met.
(1) Residential construction. New construction or substantial improvement of any residential structure shall have the lowest floor, including basement, elevated one foot above the base flood elevation.
(2) Nonresidential construction. New construction or substantial improvement of any commercial, industrial, or other nonresidential structure shall either have the lowest floor, including basement, elevated one foot above the level of the base flood elevation or, together with attendant utility and sanitary facilities, be flood proofed so that below such a level the structure is watertight with walls substantially impermeable to the passage of water and with structure components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. A registered professional engineer or architect shall certify that the standards of this division (A)(2) are satisfied. The certification shall be provided to the local enforcement official.
(3) Require for all new construction and substantial improvements. Fully enclosed areas below the lowest floor that are subject to flooding shall 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 registered professional engineer or architect or meet or exceed the following minimum criteria. A minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be provided. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.
(B) Require the use of construction materials that are resistant to flood damage;
(C) Require the use of construction methods and practices that will minimize flood damage;
(D) Require that new structures be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyance;
(E) New structures 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;
(F) Assure that all manufactured homes shall be anchored to resist flotation, collapse, or lateral movement. Manufactured homes must be anchored in accordance with state laws, local building codes, and FEMA guidelines. In the event that over-the-top frame ties to ground anchors are used, the following specific requirements (or their equivalent) shall be met:
(1) Over-the-top ties be provided at each of the four corners of the manufactured home with two additional ties per side at the intermediate locations and manufactured homes less than 50 feet long requiring 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 and manufactured homes less than 50 feet long requiring four 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 manufactured homes be similarly anchored.
(G) Require that all manufactured homes to be placed within Zones A1-30, AH, and AE on the community's FIRM be elevated on a permanent foundation such that the lowest floor of the manufactured homes is one foot above the base flood elevation; and be securely anchored to an adequately anchored foundation system in accordance with the provisions of division (F) above.
(1973 Code, § 11-506) (Ord. 556, passed 2-7-1985; Ord. 557, passed 3-7-1985; Ord. 579, passed 5-8-1987)