22-19 - Amend Chapter 1308 flood damage prevention following FEMA flood zone update - ordinance

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submission shall include appropriate supporting documentation made in writing by the Mayor of City of Lakewood, and may be submitted at any time. (c) Annexation / Detachment. Upon occurrence, the Floodplain Ad- ministrator shall notify FEMA in writing whenever the boundaries of the City of Lakewood have been modified by annexation or the community has assumed authority over an area, or no longer has authority to adopt and enforce floodplain management regulations for a particular area. In order that the City of Lakewood Flood Insurance Rate Map accurately represent the City of Lakewood boundaries, include within such notifi- cation a copy of a map of the City of Lakewood suitable for reproduction, clearly showing the new corporate limits or the new area for which the City of Lakewood has assumed or relinquished floodplain management regulatory authority. 1308.21 DATA USE AND FLOOD MAP INTERPRETATION. The following guidelines shall apply to the use and interpretation of maps and other data showing areas of special flood hazard: (a) In areas where FEMA has not identified special flood hazard areas, or in FEMA identified special flood hazard areas where base flood ele- vation and floodway data have not been identified, the Floodplain Ad- ministrator shall review and reasonably utilize any other flood hazard data available from a federal, state, or other source. (b) Base flood elevations and floodway boundaries produced on FEMA flood maps and studies shall take precedence over base flood el- evations and floodway boundaries by any other source that reflect a re- duced floodway width and/or lower base flood elevations. Other sources of data, showing increased base flood elevations and/or larger floodway areas than are shown on FEMA flood maps and studies, shall be reason- ably used by the Floodplain Administrator. (c) When Preliminary Flood Insurance Rate Maps and / or Flood In- surance Study have been provided by FEMA: (1) Upon the issuance of a Letter of Final Determination by the FEMA, the preliminary flood hazard data shall be used and replace all previously existing flood hazard data provided from FEMA for the purposes of ad- ministering these regulations. (2) Prior to the issuance of a Letter of Final Determination by FEMA, the use of preliminary flood hazard data shall only be required where no base flood elevations and /or floodway areas exist or where the prelimi- nary base flood elevations or floodway area exceed the base flood eleva- tions and/or floodway widths in existing flood hazard data provided from FEMA. Such preliminary data may be subject to change and /or appeal to FEMA. (d) The Floodplain Administrator shall make interpretations, where needed, as to the exact location of the flood boundaries and areas of spe- cial flood hazard. A person contesting the determination of the location of the boundary shall be given a reasonable opportunity to appeal the interpretation as provided in Section 1308.24, Appeals and Variances. (e) Where a map boundary showing an area of special flood hazard and field elevations disagree, the base flood elevations or flood protec- tion elevations (as found on an elevation profile, floodway data table, established high water marks, etc.) shall prevail. 1308.22 SUBSTANTIAL DAMAGE DETERMINATIONS. 13