10/14/2015 P&Z Packet - Laserfiche WebLink

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(a)Upon receipt of an application for a permit or other approval within the General Floodplain District, the Zoning Administrator must obtain, review and reasonably utilize any regional flood elevation and floodway data available from a federal, state, or other source. (b) If regional flood elevation and floodway data are not readily available, the applicant must furnish additional information, as needed, to determine the regulato,ry flood protection elevation and whether the proposed use would fall within the Floodway or Flood Fringe District. Information must be consistent with accepted hydrological and hydraulic en _ in�g standards and the standards in § 1103.07 (2)(c) below. (c) The determination of floodway and flood fringe must include the following components, as applicable: 1. Estimate the peak discharge of the regional (1 % chance,) flood. 2. Calculate the water surface profile of the regional flood based upon a hydraulic analysis of the stream channel and overbank areas. 3. Compute the floodway necessary to convey or store the regional flood without increasing flood stages more than one-half (0.5) foot. A lesser stage increase than 0.5 foot is required if, as a result of the stage increase, increased flood damages would result. An equal degree of encroachment on both sides of the stream within the reach must be assumed in computing floodway boundaries. (d) The Zoning Administrator will review the submitted information and assess the technical evaluation and the recommended Floodway and/or Flood Fringe District boundary. The assessment must include the cumulative effects of previous floodway encroachments. The Zoning Administrator may seek technical assistance from a designated engineer or other expert person or agency, including the he Department of Natural Resources. Based on this assessment, the Zoning Administrator may pprove or den., t�pplication. (e) Once the Floodway and Flood Fringe District boundaries have been determined, the Zoning Administrator must process the permit application consistent with the applicable provisions of § 1103.05 and 1103.06 of this chapter. (3) Prohibited uses-. All other- uses or- stfuetufes not listed as pefmitted or- eofiditional . . the Flood Plain Over -lay Dis4iet shall be prohibit (4) Xeneq*miing uses. A structure or the ttse of a structure or premises which was lawfit! before the passage or- amendment of the seetion biA w-hieh is not in eefifel:fflit with the provisions of this seetion may be eentintied subjeet te the following e0fiditiefts. (a) No use shall be expanded, changed, enlar-ged or altered in a way which increases its floneofif0fMity. of the stmeture shall exeeed (b) No stmetiir-al alteration or- addition to any noneonf4ming stmewr-e over- the life of its assessed vaitte at the time of its becoming -a 22 of 39