FLOOD07489

• County: Statewide
• Basin: Statewide
• Title: Appeals, Revisions, and Amendments to Flood Insurance Maps - A Guide for Community Officials
• Date: 1/1/1990
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

have the NFIP map revised, must submit the
request to the CEO or the designated
community official and ask that the request be
forwarded to FEMA.

The CEO or the designated official should review
the request and, when forwarding it to FEMA,
should state whether the community supports it.
If FEMA receives a map revision request directly
from a private party, without community
concurrence, FEMA will ask the requestor to
provide evidence that the request was fi rst
submitted to the CEO or designated official.

CEOs or the officials they designate should
submit all requests for map revisions to the
appropriate FEMA Regional Office. If the
request is for a determination involving a single
structure or single lot, the Regional Office will
make the determination. All other requests will
be reviewed by the Regional Office and
forwarded to the FEMA Headquarters office in
Washington, D.C., for disposition. Regional
Offices and their addresses are listed in
Appendix D.

Required Supporting Data

The type and amount of supporting data that
must be submitted largely depend on the reason
for the revision and the type of changes to be
made.

Revisions to effective NFIP maps are usually
Tequested because of changes that have taken
place in the floodplain. Such changes include,
but are not limited to, the construction of new
bridges, culverts, levees, or channel
improvements and the grading and filling
normally associated with development
(including the placement of fill to elevate
individual structures and lots above the BFE).
Occasionally, revisions will be requested because
the analyses used by FEMA to develop the data
shown on the effective NFIP map are found to
contain errors or because a requestor believes
that the use of alternative methodologies or
better data wi II provide superior results.

To support requests based on the effects of
physical changes that have occurred in the
floodplain or on the use of alternative
methodologies or better data, the requestor

must provide new analyses, in which the
alternative methodologies or better data are
used, and all other data FEMA would need to
revise the effective map. FEMA will not perform
any analyses to determine either the nature or
extent of the changes that might be
necessitated by those types of requests.

To support requests based on the contention
that mathematical or measurement errors have
been made, the requestor need only identify the
errors and provide the new data FEMA would
need to perform new analyses and correct the
maps.

The data that must be submitted in support of
various types of revision requests are detailed in
the subsections that follow.

Revisions Based on Effects of Physical
Changes That Have Occurred in
Floodplain

For changes that affect hydrologic conditions.
the following data must be submitted:

. GeneTal description of changes (e.g.,
dam, diversion channel, detention basin)

. Construction plans for as-built condition,
if applicable

. New hydrologic analysis that accounts
for effects of changes

. New hydraulic analysis based on flood
discharge values from new hydrologic
analysis

. Revised delineations of floodplain and
floodway boundaries on a topogTaphic
map

. Annotated copies of FHBM, FIRM, FBFM,
Flood Profiles, and FIS report tables, as
appropriate, that show req uested
revisions

For changes that affect hydraulic conditions. the
following data must be submitted:

. General description of changes (e.g.,
channelization, new bridge, culvert,
levee)

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