Ord #177 - Flood Plain Management Ordinance

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(4) In the General Floodplain District, applicants must provide the information required in Section 78-1129 of this ordinance to determine the regional flood elevation, the Floodway and Flood Fringe District boundaries and the regulatory flood protection elevation for the subdivision site. (5) If a subdivision proposal or other proposed new development is in a flood prone area, any such proposal must be reviewed to assure that: (a) All such proposals are consistent with the need to minimize flood damage within the flood prone area, (b) All public utilities and facilities, such as sewer, gas, electrical, and water systems are located and constructed to minimize or eliminate flood damage, and (c) Adequate drainage is provided to reduce exposure of flood hazard. 78-1132 Building Sites. If a proposed building site is in a flood prone area, all new construction and substantial improvements (including the placement of manufactured homes) must be: (1) Designed (or modified) and adequately anchored to prevent floatation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy; (2) Constructed with materials and utility equipment resistant to flood damage; (3) Constructed by methods and practices that minimize flood damage; and (4) 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. Sections 78-1133 through 78-1139 Reserved DIVISION 8 PUBLIC UTILITIES, RAILROADS, ROADS, AND BRIDGES 78-1140 Public Utilities: All public utilities and facilities such as gas, electrical, sewer, and water supply systems to be located in the floodplain must be floodproofed in accordance with the State Building Code or elevated to the regulatory flood protection elevation. 78-1141 Public Transportation Facilities: Railroad tracks, roads, and bridges to be located within the floodplain must comply with Divisions 4.0 and 5.0 of this ordinance. These transportation facilities must be elevated to the regulatory flood protection elevation where failure or interruption of these facilities would result in danger to the public health or safety or where such facilities are essential to the orderly functioning of the area. Minor or auxiliary roads or railroads may be constructed at a lower elevation where failure or interruption of transportation services would not endanger the public health or safety. 78-1142 On-site Water Supply and Sewage Treatment Systems: Where public utilities are not provided: 1) On-site water supply systems must be designed to minimize or eliminate infiltration of flood waters into the systems and are subject to the provisions in Minnesota Rules Chapter 4725.4350, as amended; and 2) New or replacement on-site sewage treatment systems must be designed to minimize or eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters, they must not be subject to impairment or contamination 1s