Plaquemines Parish, Louisiana - Maps - April 12, 2006
- Plaquemines Parish Maps - April 12, 2006
- Plaquemines Parish Maps - Addendum 1, September 21, 2007
Frequently Asked Questions
- How do I find the Katrina Recovery Map that shows my property?
- How do I determine what Advisory Base Flood Elevation (ABFE) applies to my property?
- I know my ABFE. How high above ground does this mean I have to elevate my structure?
To locate a particular property based on the April 12, 2006, guidance and depicted on the June 5, 2006, set of Katrina Recovery Maps, the first step is to determine which detailed Katrina Recovery Map panel applies to the area of interest. If the property is located in an area designated as "To Be Determined," the Addendum #1 Katrina Recovery Maps should be used to locate the ABFE information, as described in the separate section.
Users of the June 5, 2006, Katrina Recovery Maps should first consult the overview of panels shown on the Plaquemines Parish Index Map (PDF 3.0MB), which shows the panels produced and what area is covered by each. Panel numbers are shown in green text (e.g., AA-36). Panels were produced for this set of maps where structures or other significant development could be observed on recent aerial photography in the affected areas of Belle Chasse (sub-basin "a") and outside of levees.
Once the detailed Katrina Recovery Map panel number is found, it can be opened by clicking on the corresponding panel number on the parish map found below. The panel will open up in the Internet browser window using the Adobe Acrobat Reader software. The June 5, 2006, Katrina Recovery Map panels range in size from 1.1 MB to 1.9 MB.
AA33 AA34 AA35 AA36
Z32 Z33 Z34 Z35 Z36 Z37
Y31 Y32 Y33 Y34 Y35
X31 X32 X33 X34
W31 W32 W33 W34
V32 V33 V34
U33 U34 U35
T33 T34 T35
S33 S34 S35 S36 S37
R35 R36 R37 R38 R39 R40
Q37 Q38 Q39 Q40 Q41
P39 P40 P41 P42
O41 O42 O43
Katrina Recovery Maps are for advisory purposes only; they do not supersede effective Flood Insurance Rate Maps (FIRMs). The Hurricane Katrina-related data presented are preliminary and subject to update as additional data become available.
The Katrina Recovery Maps depict ABFEs (that is, elevation 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 on FEMA's FIRMs. [Note: Individuals unfamiliar with FIRMs can view the online tutorial, “How to Read a Flood Insurance Rate Map (FIRM).”]
On the Katrina 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 VE 17 on the June 5, 2006, maps). The effective FIRMs and these ABFEs are measured relative to either the National Geodetic Vertical Datum of 1929 (NGVD29), and this is noted in the recovery map legend. The whole-foot ABFE listed on contours shown on the June 5, 2006, set of maps can be directly applied to properties located with the zone. On some maps, a thick yellow line marks the inland limit of the ABFEs; landward of the line, ABFEs do not apply. For more details on ABFE determination, consult the applicable guidance document dated original April 12, 2006, guidance.
Since the June 5, 2006, ABFEs are measured relative to NGVD29, property owners will need ground elevations measured in the same vertical datum to determine how high above grade a structure should be elevated to meet the recommended ABFE. Property owners are advised to consult with a licensed surveyor or professional engineer to determine ground elevations and vertical datum to apply at their site. Once the ground elevation is known, it can be subtracted from the ABFE to calculate the height above grade the structure's first floor (in Zone AE) or lowest horizontal structural member (in Zone VE) should be elevated.