Louisiana Flood Preparations – Useful information to share

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As flood warnings go up in Louisiana, the employees at Delta Rigging & Tools are getting prepared and helping our customers to do the same. The following information is shared as it may be useful to anyone working or living in Louisiana that may be in harms way because of the rising waters.

For the latest local news coverage, go here.

As the flood crest moves down the Mississippi River toward Louisiana, many people want to know how their ground elevation compares to the predicted flood crest. Information is available on the LSU AgCenter website to help.

The LSU AgCenter has two mapping services/sites
(www.LSUAgCenter.com/floodmaps<http://www.LSUAgCenter.com/floodmaps> and
http://maps.lsuagcenter.com/windspeed_elevation/) that ANYONE can use to
find the ground elevation at ANY spot in Louisiana.

* Both sites allow you to find a point by clicking the spot on the
map or by entering a street address.

* Both sites allow you to turn on a background aerial image to
locate a specific building or property.

* You can zoom in and out on either map, as well as pan the map in
any direction.

* Click with the mouse on either map to place a pin and see ground
elevation value (along with other information about the point).

Here is more information about each of these sites:

This link takes you to the portal for flood insurance rate maps, which are
used in the National Flood Insurance Program.

* Click on the parish of your choice.

* When the parish map opens, you can turn off the flood layers
(uncheck the boxes in the upper right corner).

* Enter an address and click on “find.”

* Turn on the “hybrid” base map to activate the aerial imagery and
really zero in on an individual structure.
LSUAgCenter.com/floodmaps is directly accessible from the LSU AgCenter
home page. Click on “flood maps” under “featured links.” People using this
portal will find further information about the flood maps that appear and
how they can be used during a flood.

This link takes you to the LSU AgCenter wind speed and elevation
interactive map.

Some important notes:

* Turn off the “basic wind speed” layer (the on-off toggle is just
above the legend).

* Enter an address and click on “find.”

* Turn on the “hybrid” base map to activate the aerial imagery and
identify individual structures.

Precautions for using the elevations provided at these sites.

* The websites should not be relied upon to determine levee
elevations. Due to the nature of the data, narrow features such as the
crowns of levees are difficult to represent accurately and are only
approximations. Your local office of emergency preparedness should have
information about current elevations of local levees.

* The flood elevation in the river, at the gauge, is not
necessarily the elevation the water will be even 100 yards or certainly a
few miles away from the gauge. The river elevations are of the water level
in a very constrained environment. We hope local authorities and
forecasters will attempt to predict the water surface elevation in
specific locations – if the levees are breached or overtopped.

* Links to the Mississippi and Atchafalaya River gauges are listed
below. These links also lead to the mapping sites and flood prevention
materials and related information for the 2011 spring flood. The following
river stage gauges report water level elevations in the same vertical
reference system that is used to provide ground elevations in our



Mississippi River Gauges

* Red River Landing

* Baton Rouge

* Donaldsonville

* Reserve

Atchafalaya River Gauges

* Simmesport

* Melville

* Butte LaRose

* Morgan City

Note that the following river stage gauges report water level elevations using a
different vertical reference system than the one used to provide ground
elevations in our websites, so these require that a conversion factor be
added to the gauge reading to get a number that can be compared to the
ground elevations provided in our system.

Mississippi River Gauges

* Natchez — Add 17.3 feet to the gauge reading or predicted crest
at that gauge.

* Vicksburg – Add 46.2 feet to the gauge reading or predicted
crest at that gauge.

Delta Rigging & Tools will allow comments on this page. As a community service, if you have useful information that anyone living or working in Louisiana could use as they prepare for this historic flood, please feel free to post it here.

Thank you.

Delta Rigging & Tools

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