History |
Fact Sheet |
De-Authorization Study |
Navigation Channel Closure |
Ecosystem Restoration Plan Feasibility Study
MRGO Navigation Channel Closure
MRGO Closure Structure is Complete
The closure of the MRGO navigation channel is a direct result of the
Deep-Draft De-authorization Report
submitted by the USACE to Congress in June 2008. Submission of the
report officially de-authorized the channel from the GIWW to the Gulf
of Mexico and authorized the construction of a rock closure structure,
removal of aids to navigation, and disposition of real estate easements.
In late July 2009, Pine Bluff Sand & Gravel Company from Pine Bluff, Arkansas
completed placing the last loads of armor stone onto the Mississippi River
Gulf Outlet rock closure structure. The rock structure was built 1,500 feet
southeast of Bayou La Loutre in St. Bernard Parish. Final construction specs
included the placement of approximately 352,000 tons of stone materials
(approximately 126,000 tons of stone came from the south jetty at the end
of the MRGO channel) to build the structure with a 12 foot crown, a 450 foot
bottom width, and a top height of +8 feet NAVD 88. Channel bank tie-ins are
50 feet wide extending approximately 150 feet onto the south bank and 250 feet
onto the north bank.
Image Gallery
The images below document the construction of the MRGO rock closure structure from April 3, 2009 to August 4, 2009.
Aerial photos provided by Pine Bluff Sand and Gravel Company.
Click on an image to display a larger version and a description of the image.
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April 3, 2009
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April 3, 2009
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April 16, 2009
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May 12, 2009
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June 3, 2009
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June 3, 2009
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June 4, 2009
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July 2, 2009
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August 4, 2009
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