79-109 Ordinance - Laserfiche WebLink

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CITY OF NORTh,?LMSTED ORDINANCE N0. 79-109 PAGE 9. D. UTILITIES (1) All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system; (2) New and replacement sanitary sewage systems shall be designed to minimize or eliminate infiltration of flood waters into the systems and discharge form 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. E. SUBDIVISION PROPOSALS (1) Al1 subdivision proposals shall be consistent with the need to minimize flood damage; (2) All subdivision proposals shall have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize flood damage; (3) All subdivision proposals shall have adequate drainage provided to reduce exposure to flood damage; and, (4) Base flood elevation data shall be provided for subdivision proposals and other proposed development which contain at least 50 lots or 5 acres (whichever is less). F. SPECIFIC STANDARDS In all areas of special flood hazards where base flood elevation data have been provided as set forth in Section 3 B BASIS FOR ESTABLISHING THE AREAS OF SPECIAL FLOOD HAZARD or Section 4 D(2), Use of Other Base Flood Data, the following provisions are reauired: (1) Residential Construction (a) 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 (a) 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: (i) be floodproofed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water; (ii) have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and, (iii) be certified by a registered professional engineer or arclzitect tha.t the standards of this subsection are satisfied. Such certification shall be provided to the official as set forth in Section 4 A(3). (b) A variance to the elevation or dry floodproofing standards may be granted for accessory structures (e.g., sheds, detached garages) built at a cost of less than $4,000. Such structures must meet the encroachment provisions of Section 5 H(1) and the following additional standards: (i) they shall not be used for hunan habitation; (ii) they shall be designed to have low flood damage potential;