1985-09-16 Public Hearing and Special Meeting

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e e -12- (3) Base flood elevation data shall be generated for subdivision proposals, and other proposed develop:oont which is greater than 50 lots or 5 acres, whichever is lesser, if not otherwise provided pursuant to Article 3, Section E, or Article 4, Section B(7) of this Ordinance. ( 4) All deve loprent proposals shall have adequate drainage provided to reduce exposure to flood hazard. (5) All ooveloprent proposals shall have public utilities and facilities such as se\>Jer, gas, electrical and water systems located and con- structed to minimize flood damage. SECTION D. STANUl\Rll3 FOR AREAS OF SHAI..I..CW FlOODING (AO/AH ZONES) Located within the areas of special flood hazard established in Article 3, Section B, are areas designated as shallow flooding. These areas have special flood hazards associated with base flood depths of 1 to 3 feet where a clearly defined channel dces not exist and where the path of flooding is unpredictable and where velocity flow may be evioont. Such flooding is characterized by ponding or sheet flow~ therefore, the following provisions apply: (1) All new construction and substantial improverrents of residential struc- tures have the lowest floor (includiIXJ baserrent) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the conmunity's FIRM (at least two feet if no depth number is specified). ( 2) All new construction and substantial improverrents of non-residential structures: (i) Have the lowest floor (including baserrent) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the ccmnunity's FIRM (at least two feet if no depth number is specified), or~ (ii) TOgether with attendant utility and sanitary facilities be designated so that below a distance of two feet above the base flood level the structure is watertight with walls substantially impenreable to the passage of water with structural canponents having the capability of resisting hydrostatic and hydrodynamic loads or effects of buoyancy. (3) A registered professional engineer or architect shall sutmit a certifi- cation to the Flood Plain ACkninistrator that the standards of this Section, as proposed in Article 4, Section C (1) a., are satisfied. (4) Iequire within Zones AH and NJ, adequate drainage paths around struc- tures on slopes, to guide floodwaters around and away fran proposed structures. SECTION E. FlOOmAYS Floodways-located within areas of special flood hazard established in Article 3, Section B, are areas designated as floodways. Since the floodway is an extrerrely hazardous area due to the velocity of flood waters which carry debris, potential projectiles and erosion potential, the following provisions shall apply: (1) Encroachrrents are prohibited, including fill, new construction, sub- stantial improverrents and other developrent unless certifications by a registered professional engineer or architect lS provided demonstrating