22-19 - Amend Chapter 1308 flood damage prevention following FEMA flood zone update - ordinance

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all water supply, sanitary sewerage and waste disposal systems in the absence of any more restrictive standard provided under the Ohio Re- vised Code or applicable state rules: (1) All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of floodwaters into the systems; (2) 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, (3) On -site waste disposal systems shall be located to avoid impair- ment to or contamination from them during flooding. (c) Subdivisions and Other New Developments. (1) All subdivision proposals and all other proposed new development shall be consistent with the need to minimize flood damage and are sub- ject to all applicable standards in these regulations; (2) All subdivision proposals and all other proposed new development shall have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize or eliminate flood damage; (3) All subdivision proposals and all other proposed new development shall have adequate drainage provided to reduce exposure to flood dam- age; and (4) In all areas of special flood hazard where base flood elevation data are not available, the applicant shall provide a hydrologic and hydraulic engineering analysis that generates base flood elevations for all subdivi- sion proposals and other proposed developments containing at least 50 lots or 5 acres, whichever is less. (5) The applicant shall meet the requirement to submit technical data to FEMA in subsection (k)(I )A.iv of Section 1308.03 when a hydrologic and hydraulic analysis is completed that generates base flood elevations as required by subsection (c)(4) of this section. (d) Residential Structures. The requirements of this subsection (d) ap- ply to new construction of residential structures and to substantial im- provements of residential structures in zones A, Al -30, AE, AO, and Aft, when designated on the City's effective FIRM, and when designated on a preliminary or final FIRM issued by FEMA under the circumstances provided in subsection (m) of Section 1308.03. (1) New construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement of the structure result- ing from hydrodynamic and hydrostatic loads, including the effects of buoyancy. Where a structure, including its foundation members, is ele- vated on fill to or above the base flood elevation, the requirements for anchoring (this subsection (d)(1)) and construction materials resistant to flood damage (subsection (d)(2) of this section) are satisfied. (2) New construction and substantial improvements shall be con - structed with methods and materials resistant to flood damage. (3) New construction and substantial improvements shall be con- structed with electrical, heating, ventilation, plumbing and air condition- ing equipment and other service facilities that are designed and /or ele- vated so as to prevent water from entering or accumulating within the components during conditions of flooding. (4) New construction and substantial improvement of any residential structure, including manufactured homes, shall have the lowest floor, in- cluding basement, elevated to or above the flood protection elevation. Where flood protection elevation data are not available the structure shall have the lowest floor, including basement, elevated at least two feet above the highest adjacent natural grade. 35