cameron meadows marsh creation and terracing (cs-66) julia wall, e.i. engineering division may 6,...

Cameron Meadows Marsh Creation and Terracing(CS-66)Julia Wall, E.I.Engineering DivisionMay 6, 2014

committed to our coastcommitted to our coast

Coastal Protection and Restoration Authority of Louisiana

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Coastal Protection and Restoration Authority of Louisiana

VICINITY MAPLocation: • Calcasieu –

Sabine Basin• Cameron

Parish• 5 mi. NE of

Johnson’s Bayou

• 5 mi. N of the Gulf of Mexico

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• CWPPRA PPL 22• Federal Sponsor: NMFS• Avg. water elevation: 1.5 feet• Landloss rate: -0.94%/yr. (USGS, 1984-2010 )

• Create/restore over 350 acres of coastal marsh habitat• Create approximately 35,000 LF of earthen terraces• Re-establish hydrologic connectivity

Coastal Protection and Restoration Authority of Louisiana

PROJECT BACKGROUND

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Coastal Protection and Restoration Authority of Louisiana

PROJECT MAP

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Coastal Protection and Restoration Authority of Louisiana

CAUSES

• Rapid fluid and gas extraction

• Hurricanes• Saltwater

intrusion• Subsidence• Hydrologic

alterations

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MARSH CREATION

Coastal Protection and Restoration Authority of Louisiana

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• Restore 352 acres• Borrow from the

Gulf of Mexico• Pump via

pipeline, ~6 mi.• Target marsh

elevation +1.5 ft.• 20,000 ft.

containment dike• Planted

8.222 ft. shoreline

5,191 ft. shoreline

15,300 ft. shoreline

7,920 ft. subline

TERRACING

Coastal Protection and Restoration Authority of Louisiana

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• Construct 35,000 LF of earthen terraces

• +2.5 ft. NAVD 88

• 15 ft. crown width

• Planted

RE-ESTABLISH HYDROLOGIC

CONNECTIVITY

Coastal Protection and Restoration Authority of Louisiana

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• Clean out 30,000 LF of canals

• Drainage canals filled in with debris due to hurricanes

B1 Canal

PROJECT FUTURE

Coastal Protection and Restoration Authority of Louisiana

• Engineering and Design: 2014-2015• Hydrodynamic modeling• Topographic, bathymetric, and magnetometer survey• Geotechnical investigation• Offshore borrow site investigation

• Compete for CWPRRA Phase II Funding: December 2015

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Coastal Protection and Restoration Authority of Louisiana

QUESTIONS

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