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Lost Lake Marsh Creation and Hydrologic Restoration (TE-72)
Russ Joffrion, P.E.Engineering Division
May 6, 2014
committed to our coastcommitted to our coast
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• CWPPRA PPL 19 • Create/Restore over 400 acres of intertidal marsh• Create approximately 30,000 LF of earthen terraces• Replace 4 fixed crest weirs and 1 earthen plug with
variable crest weirs• Engineering and Design: November 2012• Phase 2 Funding: January 2013• Anticipated Bid Advertisement: Fall 2014
Coastal Protection and Restoration Authority of Louisiana
PROJECT BACKGROUND
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PROJECT VICINITY MAP
Coastal Protection and Restoration Authority of Louisiana
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PROJECT LAYOUT
Coastal Protection and Restoration Authority of Louisiana
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PROJECT LAYOUT
Coastal Protection and Restoration Authority of Louisiana
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MARSH CREATION FILL AREAS AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
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MARSH NOURISHMENT FILL AREA AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
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EARTHEN TERRACE LAYOUT AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
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VARIABLE CREST WEIR TYPICAL SECTION
Coastal Protection and Restoration Authority of Louisiana
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SUMMARY OF ESTIMATED QUANTITIES
• Marsh Fill: 3.3M CY (Cut)• Marsh Nourishment: 120K CY (Cut)• Shoreline Restoration: 4,000 LF• Containment Dikes: 50,700 LF• Earthen Terraces: 30,000 LF• 5 Water Control Structures
– Channel Excavation: 1,500 CY – Treated Timber Piles: 9,000 LF– Steel Sheet Pile: 17,000 SF– Rip Rap (55 lb): 1,400 CY
Coastal Protection and Restoration Authority of Louisiana
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Coastal Protection and Restoration Authority of Louisiana
QUESTIONS