FLOOD07385 - Laserfiche WebLink

Home Browse Search

. When, for good cause, the community wishes to shift the floodway or change its configuration in some way, Appeals and Map Revisions that result in changes to BFE's are generaliy supported by new or revised hydraulic analyses that involve modification of the hydraulic computer model. Because the f100dway is developed using this model and the floodway width is dependent on a specified rise in the BFE's, changes to floodways will usually be a part of any Appeal or Map Revision that results in changes to BFE's. A floodway revision request may be submitted during the gO-day appeal period or after the NFIP map on which the floodway is shown has become effective, Requests submitted during the appeal period wili be handled as Protests, Requests submitted after the effective date of the N FIP map will be handled under the Map Revision process, 1. How To Request a Floodway Revision Because the community selects and adopts the floodway, ali requests for changes to floodways must be made or approved by the community, FEMA will not revise a floodway without the approval of the community, Because the community is responsible for ensuring that it meets the obligation to regulate floodways, FEMA wili work with the community or a local official, such as a city planner or city engineer, designated by the community in evaluating requests that involve changes to floodways, Therefore, any individual property owner, developer, or other person who wishes to request a map change that involves the floodway must submit the request to the community or the designated official. The designated community official, should review the request and, when forwarding it to FEMA, should state whether the community approves the requested change, AIi requests that involve changes to f100dways should be submitted to the FEMA Regional Office in Denver. Data Required To Support the Request Floodway revisions cannot be made without adequate supporting information, Because many States require communities to foliow administrative procedures in revising floodways and because the limits of the floodway are established through engineering analyses, both legal documentation and technical data must be submitted, The foliowing are descriptions of the documentation and data that must be submitted to support each type or floodway revision, 2. General Guidance For All Floodway Revisions The foliowing documentation must be submitted as evidence that the community is prepared to adopt the revised floodway and that ali legal requirements wili have been met before the floodway is revised: a Copy of a pUblic notice stating the community's intent to revise the floodway and a statement that the community has notified any affected property owners or adjacent jurisdictions b, Copy of a ietter notifying the State of the floodway revision c, Documentation of the approval of the revised floodway by the appropriate State agency (for communities where the State has jurisdiction over the floodway or its adoption by communities par' ticipating in the NFIP) G. Floqqway Revisions Made as Part of an Appeal or Map RevIsIOn The following data must be submitted: 1. Engineering analysis for the revised floodway, performed accord- ing to the foliowing steps: a, The floodway analysis should be performed uSing the desired floodway limits and the hydraulic computer model used to determine the new BFE's for the Appeal or Map Revision, b, The f100dway limits should be set so that neither the effective BFE's nor those resulting from the Appeal or Map Revision are increased by more than the amount allowed by FEMA and the State, (Copies of the input and output data from the original, mod- ified, and fioodway computer models must be submitted,) 2, Delineation of the revised floodway on the same topographic map used for the delineation of the revised flood boundaries resulting from the Appeal or Map Revision, 33