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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
• 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
PROJECT VICINITY MAP
Coastal Protection and Restoration Authority of Louisiana
PROJECT LAYOUT
Coastal Protection and Restoration Authority of Louisiana
PROJECT LAYOUT
Coastal Protection and Restoration Authority of Louisiana
MARSH CREATION FILL AREAS AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
MARSH NOURISHMENT FILL AREA AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
EARTHEN TERRACE LAYOUT AND TYPICAL
SECTION
Coastal Protection and Restoration Authority of Louisiana
VARIABLE CREST WEIR TYPICAL SECTION
Coastal Protection and Restoration Authority of Louisiana
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
Coastal Protection and Restoration Authority of Louisiana
QUESTIONS