Ordinance No. 19466 - Laserfiche WebLink

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fib} Construction materials and methods. X11 new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage, using methods and practices that min~m~ze flood damage. Electrical, heating, venti- lation,`plumbing, and air-conditioning equipment and other service fac~lit~es shall be designed and/or otherwise elevated or located so as to prevent water from entering or accumulating within the components during conditions of flaoding. ~c} Utilities. 1. X11 new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system; ~. 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; and, 3. On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding, ~d} Subdi vi s„ion pro.pos,al s; 1. All subdivision proposals shall: a. Be consistent with the need to minimize flood damage; b. Have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize flood damage; and c. Have adequate drainage provided to reduce ex- posure to flood damage; and ~. where base flood elevation data has not been provided or is not available from another authoritative source, it shall be generated far subdivision proposals and other pro- posed developments which contain at least 50 lots yr five acres whichever is less}, Review of buildin ' e ,,. _ g permits. Where elevation data is not avai 1 abl a either through the F~~oad~~w Insurance Study or from another authoritative source, applications far building permits shall be reviewed to assure that proposed construction will be reasonably safe from flooding. The test of reasonableness is a local judg- ment and includes use of historical data, high water marks, photo- graphs of past flooding, etc,, where available. Failure to elevate at least two feet above grade in these zones may result in higher insurance rates, ~~} S ecific standards, In all areas of special flood hazards where base flood elevation data has been provided as required in subsections 9.504 ~~} or ~2}, the following provisions are required: ~a} Residential construction. 1. New construction and substantial improvement of any residential structure shall have the lowest floor, including basement, elevated to or above base flood elevation. ~. Fully enclosed areas below the lowest floor that are subject to flaoding are prohibited, or shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. De- Ordinance - 5