lost lake marsh creation and hydrologic restoration (te-72) russ joffrion, p.e. engineering division...

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