12-19-1996 Public Hearing and Regular Meeting of the La Porte Planning and Zoning Commission

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• • #FV97-001 Page 5 of 8 1/16/97 A No-Rise Certification from a registered professional engineer must be submitted and approved by the City. The certification should be obtained from the permittee and be signed and sealed by a registered professional engineer. No-Rise Certification in Regulatory Floodways Section 60.(d)(3) of the National Flood Insurance Program (NFIP) states that a community shall "prohibit encroachments, including fill, new construction, substantial improvements and other development within the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analysis performed in accordance with standard engineering practices that the proposed encroachment would not result in any increase in flood levels within the community during the occurrence of the base (100-year) flood discharge". Prior to issuing any building, grading or development permit involving activities in a regulatory floodway, the community must obtain a certification stating the proposed development will not impact the pre-project base flood elevations, floodway elevations or floodway widths. The engineering or "no-rise" certification must be supported by technical data. The supporting technical data should be based upon the standard step-backwater computer model utilized to develop the 100-year floodway shown on the community's effective Flood Insurance Rate Map (FIRM) or Flood Boundary and Floodway Map (FBFM) and the results tabulated in the Community's Flood Insurance Study (FIS). Although communities are required to review and approve the "no-rise" submittal, they may request technical assistance and review from the Texas Water Commission's Flood Management and Groundwater Programs Section. However, if this alternative is chosen, the community must review the technical submittal package and verify that all supporting data, listed in the following paragraphs, are included in the package before forwarding to FEMA. To support a "no-rise" certification for proposed developments encroaching into the regulatory floodway, a community will require that the following procedures be followed: Currently Effective Model Furnish a written request for the step-backwater computer model for the specified stream and community, identifying the limits of the requested data. A fee will be assessed for the requested data.