Form 086-0-27C Coastal Analysis Form

DEPARTMENT OF HOMELAND SECURITY
FEDERAL EMERGENCY MANAGEMENT AGENCY

O.M.B. NO. 1660-0016
Expires December 31,2010

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.
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):

D Storm surge modeling

D Wave setup computations

D Wave height computations

D Wave runup computations

D Wave overtopping computations

D Dune erosion computations

D Primary Frontal Dune Assessment

D 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):
DWave setup analyses (complete items 3, 4, and 5 below)

D Wave overtopping assessment (complete items 4 and 5)

D Stillwater elevation determinations (complete item 3)

D More detailed topographic information (complete Section E)

D Erosion considerations (complete item 4)

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

DWave runup analysis (complete items 4 and 5)

D Primary frontal dune assessment (complete item 5)

DWave height analysis (complete items 4 and 5)

D Other, attach basis of revision request with an explanation

13. Stillwater Elevation Determination
a. How were Stillwater elevations determined?

D Gage analysis (if revised gage analysis was used, provide copies of gage data and revised analysis)

D Storm surge analysis

D 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?

DYes D No
DYes D

c. Was the storm surge analysis revised?

Conversion factor:

No

d. If a new 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.
e. If wave setup was computed, attach a description of methodology used.
Amount of wave setup added to stillwater elevation:

DHS/FEMA Form 086-0-27C, AUG 2010

feet

PREVIOUSLY FF81-89C

MT-2 form 4

Page 1 of 2

c.

REVISED ANALYSIS (continued)

4. Revised Analysis (i.e., erosion, wave height, wave run up, primary frontal dune, and wave overtopping)
If DHS-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 DHS-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

Helgb.L.'lILWi1VJ~Qvertopping

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
of shore protection structures
or natural land forms.

a. Was an analysis performed to determine starting wave height and period for input into WHAFIS?

OYes

0

No

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

OYes

0

No

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

o

Yes

0

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

landward of its existing position.

_ _ _ _feet

10. Does this revision reflect the location of the primary frontal dune?:

o

3. Starting deep-water significant wave condition:
height _ _ _ __

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

Yes

period _ _ _ __

0

No

11. The Base Flood Elevations have:

o Increased o decreased

feet

4. Maximum wave runup height elevation:

feet

5. Maximum wave runup elevation:
6. Estimated amount of maximum overtopping:

- - - -cfs/feet

7. Has this revision changed the Limit of Moderate Wave Action
(LiMWA)?
OYes

ONo

ON/A

a. What was the greatest increase?

feet

b. What was the greatest decrease?

feet

12. The special flood hazard area has:

o

increased

0

decreased

0

both

Attach a description where it has increased or decreased

8. The areas designated as coastal high hazard areas (V Zones) have:

o

increased

0

decreased

0

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.

DHSffEMA Form 086-0-27C, AUG 2010

PREVIOUSLY ff81·89

MT-2 form 4

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