FEMA Form 086-0-27 Coastal Analysis Form

DEPARTMENT OF HOMELAND SECURITY
FEDERAL EMERGENCY MANAGEMENT AGENCY

O.M.B. NO. 1660-0016
Expires February 28, 2014

COASTAL ANALYSIS FORM

PAPERWORK BURDEN DISCLOSURE NOTICE
Public reporting burden for this form is estimated to average 1 hour per response. The burden estimate includes the time for reviewing instructions,
searching existing data sources, gathering and maintaining the needed data, and completing, reviewing, and submitting the form.
You are not required to respond to this collection of information unless a valid OMB control number appears in the upper right corner of this form.
Send comments regarding the accuracy of the burden estimate and any suggestions for reducing this burden to: Information Collections
Management, Department of Homeland Security, Federal Emergency Management Agency, 500 C Street, SW, Washington, DC, 20472, Paperwork
Reduction Project (1660-0016). Submission of the form is required to obtain or retain benefits under the National Flood Insurance Program. Please
do not send your completed survey to the above address.
PRIVACY ACT STATEMENT
AUTHORITY: The National Flood Insurance Act of 1968, Public Law 90-448, as amended by the Flood Disaster Protection Act of 1973, Public Law
93-234.
PRINCIPAL PURPOSE(S): This information is being collected for the purpose of determining an applicant's eligibility to request changes to National
Flood Insurance Program (NFIP) Flood Insurance Rate Maps (FIRM).
ROUTINE USE(S): The information on this form may be disclosed as generally permitted under 5 U.S.C § 552a(b) of the Privacy Act of 1974, as
amended. This includes using this information as necessary and authorized by the routine uses published in DHS/FEMA/NFIP/LOMA-1 National Flood
Insurance Program (NFIP); Letter of Map Amendment (LOMA) February 15, 2006, 71 FR 7990.
DISCLOSURE: The disclosure of information on this form is voluntary; however, failure to provide the information requested may delay or prevent
FEMA from processing a determination regarding a requested change to a (NFIP) Flood Insurance Rate Maps (FIRM).
Flooding Source:
Note: Fill out one form for each flooding source studied.
A. COASTLINE TO BE REVISED
Describe limits of study area:
B. EFFECTIVE FIS
The area being revised in the effective FIS was studied by detailed methods using (check all that apply):
Storm surge modeling

Wave setup computations

Wave height computations

Wave runup computations

Wave overtopping computations

Dune erosion computations

Primary Frontal Dune Assessment

N/A (area not studied by detailed methods)
C. REVISED ANALYSIS

1. Number of transects in revised analyses:
2. Information used to prepare the revision (check all that apply):
Wave setup analyses (complete items 3, 4, and 5 below)

Wave overtopping assessment (complete items 4 and 5)

Stillwater elevation determinations (complete item 3)

More detailed topographic information (complete Section E)

Erosion considerations (complete item 4)

Shore protection structures (attach completed Coastal Structures Form Form 5)

Wave runup analysis (complete items 4 and 5)

Primary frontal dune assessment (complete item 5)

Wave height analysis (complete items 4 and 5)

Other, attach basis of revision request with an explanation

3. Stillwater Elevation Determination
a. How were Stillwater elevations determined?
Gage analysis (if revised gage analysis was used, provide copies of gage data and revised analysis)
Storm surge analysis
Other (describe):
b. Specify what datum was used in the calculations:
If not the FIS datum, have the calculations been adjusted to the FIS datum?
c. If revised storm surge analysis, was FEMA's storm surge model utilized?

Yes
Yes

No

Conversion factor:

No

d. If FEMA's storm surge model was used, attach a detailed description of the difference between the current and the revised analysis, and why
the revised analysis should replace the current analysis.
FEMA Form 086-0-27C, (2/2011)

MT-2 Form 4 Page 1 of 2

C. REVISED ANALYSIS (continued)
e. If wave setup was computed, attach a description of methodology used.
feet

Amount of wave setup added to stillwater elevation:

4. Revised Analysis (i.e., erosion, wave height, wave runup, primary frontal dune, and wave overtopping)
If FEMA procedures were utilized to perform the revision, attach a detailed description of differences between the current and the revised
analysis, and why the revised analysis should replace the current analysis.
If FEMA procedures were not utilized to perform the revision, provide full documentation on methodology and/or models used; including
operational program, and detailed difference between methodology and/or models utilized and FEMA's methodology and/or models. Also,
attach an explanation of why new methodology and/or models should replace current methodology and/or models.
If revision reflects more detailed topographic information and fill has been/will be placed in a V-Zone, and is not protected from erosion by a
shore protection structure, provide a detailed description of how the fill has been treated in the revised analysis.
5. Wave Runup, Wave Height, an Wave Overtopping Analysis
Wave height analysis along a transect are greatly affected by starting wave conditions that propagate inland. Wave runup and overtopping
analysis are typically considered when wave heights and/or wave runup are close to or greater than the crest of shore protection structures
or natural land forms.
a. Was an analysis performed to determine starting wave height and period for input into WHAFIS?
Yes

No

b. Was wave setup included in wave height analysis and removed for erosion and wave runup analysis?
Yes

No

c. Was an overtoping analysis performed for any coastal shore protection structures or natural land forms that may be overtopped?
Yes

No

If Yes, attach an explanation of the methodology utilized and describe in detail the results of the analysis.
If overtopping was not analyzed, attach an explanation for why these analysis were not performed.
D. RESULTS
1. Stillwater storm surge elevation:
2. Wave setup:

feet

Datum

feet

landward of its existing position.

3. Starting deep-water significant wave condition:
height

8. As a result of the revised analysis, the V-Zone location has shifted
feet seaward and
feet
a maximum of

9. The Base Flood Elevations have:

period

increased
4. Maximum wave runup height elevation:

feet

5. Maximum wave runup elevation:

feet

6. Estimated amount of maximum overtopping:

cfs/feet

7. The areas designated as coastal high hazard areas V-Zone have:
increased

decreased

decreased

a. What was the greatest increase?

feet

b. What was the greatest decrease?

feet

10. The special flood hazard area has:
increased

decreased

both

Attach a description where it has increased or decreased

both

Attach a description where they have increased and/or decreased
E. MAPPING REQUIREMENTS
A certified topographic map must be submitted showing the following information (where applicable): effective, existing conditions, and proposed
conditions 1%-annual-chance floodplain boundaries, revised shoreline due to either erosion or accretion, location and alignment of all transects,
correct location and alignment of any structures, current community easements and boundaries, boundary of the requester's property, certification of a
professional engineer registered in the subject State, location and description of reference marks, and the referenced vertical datum (NGVD, NAVD,
etc.).
Note that the existing or proposed conditions floodplain boundaries to be shown on the revised FIRM must tie-in with the effective floodplain
boundaries. Please attach a copy of the current FIRM annotated to show the revised 1%-annual-chance floodplain boundaries that tie-in with effective
1%-annual-chance floodplain boundaries along the entire extent of the area of revision.

FEMA Form 086-0-27C, (2/2011)

MT-2 Form 4 Page 2 of 2