Hurricane Rita Surge Inundation & Advisory Base Flood Elevation Maps

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Vermilion Parish, Louisiana

FEMA has developed Hurricane Rita Surge Inundation and Advisory Base Flood Elevation Maps (referred to as, “Rita Recovery Maps”) to aid Vermilion Parish property owners to repair or rebuild structures to newly determined advisory coastal flood elevations. These maps are based on Flood Recovery Guidance for Vermilion Parish (PDF 118KB, TXT 10KB) that FEMA published in November 2005.

Frequently Asked Questions

How do I find the Rita Recovery Map that shows my property?

Vermilion Parish Image Map Thumbnail

To locate a particular property, the first step is to determine which detailed Rita Recovery Map panel applies to the area of interest. Users should first consult the Vermilion Parish Index Map (PDF 1.0MB), which shows which panels were produced and what area is covered by each. Panel numbers are shown in green text (e.g., PP25). Panels were only produced for areas where structures or other significant development could be observed on recent aerial photography.

Once the detailed Rita Recovery Map panel number is known, it can be opened by clicking on the corresponding panel number on the parish map immediately below. The panel will open up in the internet browser window using the Adobe Acrobat Reader software. The Rita Recovery Map panels range in size from 1.1 MB to 2.3 MB.

Vermilion Parish, North

HH43 HH44 HH45
GG40 GG41 GG42 GG43 GG44 GG45 GG46
FF38 FF39 FF40 FF41 FF42 FF43 FF44 FF45 FF46 FF47 FF48 FF49 FF50
EE42 EE43 EE44 EE45 EE46 EE47 EE48 E49 EE50 EE62
DD42 DD43 DD44 DD45 DD46 DD47 DD48 DD49 DD50 DD51 DD52 DD56 DD58 DD59 DD60 DD61 DD62
CC42 CC43 CC44 CC45 CC47 CC48 CC49 CC50 CC51 CC52 CC53 CC54 CC55 CC56 CC57 CC58 CC59 CC60 CC61 CC62
BB42 BB45 BB47 BB48 BB49 BB50 BB51 BB52 BB53 BB54 BB55 BB56 BB57 BB58 BB59 BB60 BB61 BB62
AA47 AA48 AA51 AA52 AA53 AA54 AA55 AA56 AA57 AA58 AA59 AA60 AA61 AA62

Vermilion Parish, South

Z49 Z50 Z51 Z52 Z53 Z54 Z55 Z56 Z57 Z58 Z59 Z60 Z61 Z62
Y51 Y52 Y53 Y54 Y55 Y56 Y57 Y58 Y59 Y60 Y61 Y62
X55 X56 X57 X59 X60
W49 W52 W53 W54 W55 W56 W58 W59
V50 V51 V54
U44 U48 U50 U52 U53 U54
T45 T46 T47 T48 T49 T50 T52 T53 T57
S43 S44 S45 S46 S47 S48 S49 S50 S51 S53 S54
R45 R48 R49 R50 R51 R53 R54
P51 P52

Rita Recovery Maps are for advisory purposes only; they do not supersede effective Flood Insurance Rate Maps (FIRMs). The Hurricane Rita-related data presented are preliminary and subject to update as additional data become available.

How do I determine what Advisory Base Flood Elevation (ABFE) applies to my property?

The Rita Recovery Maps depict ABFEs (that is, elevations that FEMA recommends be used for rebuilding) for defined areas or zones. The visual appearance of these advisory zones and elevations was intentionally made similar to the format of flood hazard data shown FEMA’s FIRMs. [Note: Individuals unfamiliar with FIRMs can view the online tutorial, “How to Read a Flood Insurance Rate Map (FIRM).”]

On the Rita Recovery Maps, each ABFE zone is outlined in yellow and is labeled with the applicable advisory flood zone type and whole-foot elevation (e.g., ABFE Zone VE Elevation 16). ABFEs are measured relative to the National Geodetic Vertical Datum of 1929 (NGVD29), or roughly sea level. The whole-foot ABFE listed on each contour can be directly applied to properties located within the zone. On some maps, a thick yellow line marks the inland limit of the ABFEs; landward of this line, ABFEs do not apply.

I know my ABFE. How high above ground does this mean I have to elevate my structure?

Since the ABFEs are measured relative to NGVD29 (or roughly sea level), property owners will need ground elevations to determine how high above grade a structure should be elevated to meet the ABFE. Property owners are advised to consult with a licensed surveyor or professional engineer to determine ground elevations at their site. Once the ground elevation is known, it can be subtracted from the ABFE to calculate the height above grade that a structure’s first floor (in A Zones) or lowest horizontal structural member (in V Zones) should be elevated.

How did FEMA determine what areas got flooded by Hurricane Rita’s storm surge, and should I be concerned if I think the surge limits are inaccurate?

FEMA used the best data available at the time the recovery mapping was completed to estimate the extent and magnitude of Hurricane Rita’s storm surge. To develop this data layer, surge-only High Water Marks (HWMs) collected by FEMA shortly after the storm were compared to detailed, pre-storm topographic data provided by the State of Louisiana. In some areas, few or no HWMs were available to help guide the mapping; in these cases, surge inundation limits were interpolated from more distant HWMs, with coastal engineering judgment and eyewitness accounts (when available) used to complete the mapping. As a result of these and other data limitations, the mapped Rita surge limits may over- or underestimate the actual coastal flooding that occurred.

The ABFEs, not the estimated Rita surge limits or surge heights, are what FEMA is advising be used for rebuilding, so there should be no negative impact on property owners if the Rita limits were over- or underestimated. If property owners have detailed documentation concerning the height and/or extent of Rita’s surge flooding that differs from the data shown on the Rita Recovery Maps, they can submit this information through the recovery mapping helpline link listed below. Unless there becomes a need to completely reanalyze the Rita surge and remap large areas, FEMA will only be able to use submitted information to help improve the surge inundation modeling and mapping procedures for future recovery mapping efforts.

Last Updated: 
02/12/2013 - 13:44
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