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1 925 General Floodplain District (GF) <br />2 (A) Permitted uses. <br />3 (1) The uses listed in section 923(A), floodway district permitted uses, are permitted uses. <br />4 (2) All other uses are subject to the floodway/flood fringe evaluation criteria specified in [section] <br />5 925(b) below. Section 923 applies if the proposed use is determined to be in the floodway <br />6 district. Section 924 applies if the proposed use is determined to be in the flood fringe district. <br />7 (B) Procedures for floodway and flood fringe determinations. <br />8 (1) Upon receipt of an application for a permit or other approval within the general floodplain <br />9 district, the zoning administrator must obtain, review and reasonably utilize any regional flood <br />10 elevation and floodway data available from a federal, state, or other source. <br />11 (2) If regional flood elevation and floodway data are not readily available, the applicant must <br />12 furnish additional information, as needed, to determine the regulatory flood protection <br />13 elevation and whether the proposed use would fall within the floodway or flood fringe district. <br />14 Information must be consistent with accepted hydrological and hydraulic engineering <br />15 standards and the standards in section 925(6)(3) below. <br />16 (3) The determination of floodway and flood fringe must include the following components, as <br />17 applicable: <br />18 a. Estimate the peak discharge of the regional (one percent chance) flood. <br />19 b. Calculate the water surface profile of the regional flood based upon a hydraulic analysis of <br />20 the stream channel and overbank areas. <br />21 c. Compute the floodway necessary to convey or store the regional flood without increasing <br />22 flood stages more than one-half foot. A lesser stage increase than one-half foot is required if, <br />23 as a result of the stage increase, increased flood damages would result. An equal degree of <br />24 encroachment on both sides of the stream within the reach must be assumed in computing <br />25 floodway boundaries. <br />26 (4) The zoning administrator will review the submitted information and assess the technical <br />27 evaluation and the recommended floodway and/or flood fringe district boundary. The <br />28 assessment must include the cumulative effects of previous floodway encroachments. The <br />29 zoning administrator may seek technical assistance from a designated engineer or other expert <br />30 person or agency, including the Minnesota Department of Natural Resources, before <br />31 presenting the technical evaluation and findings to the city council. The city council must <br />32 formally accept the technical evaluation and the recommended floodway and/or flood fringe <br />33 district boundary or deny the permit application. The city council, prior to official action, may <br />34 submit the application and all supporting data and analyses to the Federal Emergency <br />35 Management Agency (FEMA), the Minnesota Department of Natural Resources, or the planning <br />36 commission for review and comment. <br />37 (5) Once the floodway and flood fringe district boundaries have been determined, the city council <br />38 shall refer the matter back to the zoning administrator to process the permit application <br />39 consistent with the applicable provisions of sections 923 and 924. <br />40 <br />41 926 Public Utilities, Railroads, Roads, and Bridges in Floodplains. <br />42 (A) Public utilities. All public utilities and facilities such as gas, electrical, sewer, and water supply <br />43 systems to be located in the floodplain must be floodproofed in accordance with the Minnesota <br />44 State Building Code or elevated to the regulatory flood protection elevation. <br />45 (B) Public transportation facilities. Railroad tracks, roads, and bridges to be located within the <br />46 floodplain must comply with sections 923 and 924. These transportation facilities must be elevated <br />47 to the regulatory flood protection elevation where failure or interruption of these facilities would <br />48 result in danger to the public health or safety or where such facilities are essential to the orderly <br />49 functioning of the area. Minor or auxiliary roads or railroads may be constructed at a lower elevation <br />Page 125 of 160 <br />