1. Shell Island West NRDA Restoration
Catherine Ricks, P.E.
Engineering
May 6, 2014
committed to our coast
committed to our coast

2. Coastal Protection and Restoration Authority of Louisiana
Presentation Outline
Project Background
Project Overview Map
Project Features
East Lobe
West Lobe
Borrow Areas
Mississippi River – Dune/Beach & Sand Flat
Offshore – Marsh Fill
Project Schedule Overview
Summary
Coastal Protection and Restoration Authority of Louisiana

3. Coastal Protection and Restoration Authority of Louisiana
Project Background
Shell Island West NRDA Restoration Project (BA-111)
LCA Barataria Basin Barrier Shoreline (BBBS) Restoration Project
Emergency Berm Project constructed in 2010 in response to the Deepwater Horizon Oil Spill, constructed a portion of the Shell Island East Lobe (W8).
Shell Island East Berm Barrier Island Restoration Project (Shell East Berm), constructed in 2013 with Berm Enhancement Funds.
Shell Island West NRDA Restoration Project (Shell West NRDA) is the construction of the remainder of the East Lobe and the entire West Lobe.
Shell Island started the design process as part of the BBBS Restoration project under LCA
The dune portion of the eastern extent of the island was constructed under the 2010 Emergency berm construction as a response to the 2010 oil spill
Berm Enhancement funds used to complete the construction of the Shell Island East Barrier Island Restoration Project, approximately eastern 1/2 of Shell Island east lobe
Shell West NRDA completes the construction of the western portion of the east lobe, and constructs the west lobe
Design of Shell Island West NRDA is complete and waiting funding
Shell West NRDA is awaiting funding.
Coastal Protection and Restoration Authority of Louisiana

4. BA-111 Shell West NRDA Overview
MR-E
MR-A
MR-B
35-E
Shell Island
Shell Island West Lobe
Shell Island East Lobe
Project extents
Located in Plaquemines Parish between Gulf of Mexico and Bastian Bay to the west of Empire WW
Coastal Protection and Restoration Authority of Louisiana

5. Coastal Protection and Restoration Authority of Louisiana
Shell Island East Berm Project
August 15, 2013 was the last day of dune fill placement.
May 4, 2013
September 9, 2013
April 1, 2014
May 2013 aerial showing the construction of the containment dike prior to any dune or marsh fill
Last day of fill operations was August 15, 2013
September 2013 aerial after all material placed
April 2014 aerial shows the migration of the island to the west and into the design template for the Shell Island West NRDA project.
Surveys will be taken at some time prior to the bid process so a redesign can be completed with updated volumes.
Coastal Protection and Restoration Authority of Louisiana

6. Shell West NRDA East Lobe Shell East Berm Project
Project Features – East Lobe (as of May 2013)
Shell West NRDA East Lobe features include:
Marsh fill platform at approximately 3,000 linear feet
+2.5’ NAVD88
Containment dike
486,200 cy
60 acres
Marsh sand flat at approximately 5,000 linear feet
+2.5’ NAVD88
Turbidity Control Structure on the landward/bay side (no containment)
93 acres
Beach/Dune at approximately 7,800 linear feet
+8.0’ NAVD88
Uniform dune width of 340’
2,839,000 cy (includes marsh sand flat)
176 acres
Marsh Fill
(with containment)
Access Channel
Marsh Sand Flat
The volumes shown here are the volumes prior to the construction of the Shell Island East Berm project.
At this time the marsh fill platform is offshore material due to volumes available in the river,
Will look into river sand for the marsh fill area during an update to the E&D
Shell West NRDA East Lobe
Plan View
Dune/Beach
Shell East Berm Project
Coastal Protection and Restoration Authority of Louisiana

7. 19,405 acres Marsh Fill Containment Dike Primary Borrow Source
Containment Dike Secondary Borrow Source
Primary Dike 8 1
Dune/Beach 60 1
Break in Slope at +1.0 30
Marsh Sand Flat 30 1
19,405 acres
of coastal habitats benefited
One time slope adjustment
Slope and dune width may be revised while updating the survey information to account for the change in slope during the Shell East Berm project
Shell West NRDA East Lobe
Typical Cross-sections
Coastal Protection and Restoration Authority of Louisiana

8. Shell West NRDA West Lobe
Project Features – West Lobe
Shell West NRDA West Lobe features include:
Marsh fill platform approximately 5,600 linear feet
+2.5’ NAVD88
Containment dike
878,000 cy
134 acres
Beach/Dune constructed approximately 7,000 linear feet
+8.0’ NAVD88
Uniform width of 380’
2,234,000 cy
196 acres
Containment Dike
Marsh Fill
Access Channel
Dune/Beach
Shell West NRDA West Lobe
Plan View
Coastal Protection and Restoration Authority of Louisiana

9. Containment Dike Borrow Source
Marsh Fill
Primary Dike 30 8 1
Break in Slope at +1.0 1 60 1
Containment Dike Borrow Source
Dune/Beach
Marsh Fill
Primary Dike 30 8 1 1
Break in Slope at +1.0 60 1
Containment Dike Borrow Source
Shell West NRDA West Lobe
Typical Cross-sections
Coastal Protection and Restoration Authority of Louisiana

10. Dune/Beach and Sand Flat Borrow Areas
Project Features – Mississippi River Borrow Areas
MR-A
5.3 MCY (Volume are based on pre-Shell East surveys)
Cut depths to -75’ NAVD88 and -80’ NAVD88
Shell West NRDA
Dune/Beach and Sand Flat Borrow Areas
Coastal Protection and Restoration Authority of Louisiana

11. Dune/Beach and Sand Flat Borrow Areas
Project Features – Mississippi River Borrow Areas
MR-B
3.96 MCY (Volume are based on pre-Scofield surveys)
Cut depths to -80’ NAVD88
Shell West NRDA
Dune/Beach and Sand Flat Borrow Areas
Coastal Protection and Restoration Authority of Louisiana

12. Dune/Beach and Sand Flat Borrow Areas
Project Features – Mississippi River Borrow Areas
MR-E
3.5 MCY (Volume are based on Post-Construction Shell East surveys)
Cut depths to -80’ NAVD88
Need to update to post-con Scofield or Shell East
Shell West NRDA
Dune/Beach and Sand Flat Borrow Areas
Coastal Protection and Restoration Authority of Louisiana

13. Offshore Marsh Fill Borrow Area
Project Features – Offshore Borrow Area
35-E
15 MCY (Volume are based on pre-Shell East surveys)
Cut depths to -51.0’ NAVD88 and -54.0’ NAVD88
Shell West NRDA
Offshore Marsh Fill Borrow Area
Coastal Protection and Restoration Authority of Louisiana

14. Coastal Protection and Restoration Authority of Louisiana
Project Schedule
Tasks Completed:
Bathymetric and Topographic Surveys – February 2011 and January 2012
Geophysical Investigation and Final Report (Borrow Areas)– May 2012
Geotechnical Investigation and Final Report (Fill Area) – August 2012
Coastal Use Permit – August 2012, Modification – June 2013
COE 404 Permit – October 2012, Modification – Not Required
LDWF Fill Material Permit – February 2013
Engineering and Design
Future Tasks:
Update Bathymetric and Topographic Survey
Update E&D
Bid Process – Availability of Funding
Coastal Protection and Restoration Authority of Louisiana

15. Coastal Protection and Restoration Authority of Louisiana
Project Summary
Dune/Beach Fill Volume: 5,073,000 cy
Marsh Fill Volume: 1,123,000 cy
Area of Fill: 342 acres
Primary Dike: 10,790 linear feet
Sand Fencing: 14,400 linear feet
Settlement Plates: 17 plates
Coastal Protection and Restoration Authority of Louisiana

16. Coastal Protection and Restoration Authority of Louisiana
QUESTIONS
Coastal Protection and Restoration Authority of Louisiana