23-25 Amending Chapter 6, Article 9, of the South Bend Municipal Code to Update the Regulations for Flood Damage Prevention

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construction in a floodway, provided the activity does not qualify for a general license or exemption(IC 14-28-1 or 312 IAC 10). (ii) No action shall be taken by the Floodplain Administrator until approval has been granted by the Indiana Department of Natural Resources for construction in the floodway, or evidence provided by an applicant that the development meets specified criteria to qualify for a general license or exemption to the requirement of the Flood Control Act. The Floodplain Development Permit shall meet the provisions contained in this article. (iii) The Floodplain Development Permit cannot be less restrictive than an approval issued for construction in a floodway issued by the Indiana Department of Natural Resources, or the specified criteria used to qualify for a general license or exemption to the Flood Control Act for a specific site/project. However, a community's more restrictive regulations(if any)shall take precedence. (iv)In floodway areas identified on the FIRM, development shall cause no increase in flood levels during the occurrence of the base flood discharge without first obtaining a Conditional Letter of Map Revision and meeting requirements of Section 6-38.4(5)(a). A Conditional Letter of Map Revision cannot be issued for development that would cause an increase in flood levels affecting a structure and such development should not be permitted. (v) In floodway areas identified by the Indiana Department of Natural Resources through detailed or approximate studies but not yet identified on the effective FIRM as floodway areas,the total cumulative effect of the proposed development, when combined with all other existing and anticipated development, shall not adversely affect the efficiency of, or unduly restrict the capacity of the floodway. This adverse effect is defined as an increase in the elevation of the regulatory flood of at least fifteen-hundredths (0.15) of a foot as determined by comparing the regulatory flood elevation under the project condition to that under the natural or pre-floodway condition as proven with hydraulic analyses. (vi)For all projects involving channel modifications or fill (including levees), the City shall submit the data and request that the Federal Emergency Management Agency revise the regulatory flood data per mapping standard regulations found at 44 CFR§ 65.12. (b) Fringe(Riverine) If the site is in the fringe (either identified on the FIRM or identified by the Indiana Department of Natural Resources through detailed or approximate studies and not identified on a FIRM), the Floodplain Administrator may issue the local Floodplain Development Permit provided the provisions contained in this section have been met. (c) SFHAs without Established Base Flood Elevation and/or Floodways/Fringes (Riverine) (i) Drainage area upstream of the site is greater than one square mile: If the site is in an identified floodplain where the limits of the floodway and fringe have not yet been determined,and the drainage area upstream of the site is greater than one square mile,the Floodplain Administrator shall require the applicant to forward the application, along with all pertinent plans and specifications,to the Indiana Department of Natural Resources for review and comment. 24