barrier island status report - Coastal Protection and Restoration ...

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4.3 Lafourche Delta Barrier Islands (Timbalier Island to Grand Isle) The Lafourche Delta Barrier Islands have benefitted from a number of barrier island restoration projects, most recently the East Grand Terre Island Restoration project (BA-30) that was completed through CIAP (Figure 27 and Table 4). In total, five projects have been constructed in this region and several others are planned. Figure 27. Location of barrier island restoration projects in Lafourche Delta Barrier System (CEC, 2012). Table 4. List of projects constructed, funded for construction, and for future implementation in the Lafourche Delta Barrier System. Funding Program Construction Date Barrier Shoreline Restoration Projects Lafourche Barrier System Constructed Projects Timbalier Island Planting Demonstration (TE-18) CWPPRA 1996 Timbalier Island Dune and Marsh Creation (TE-40) CWPPRA 2004 East Timbalier Island Sediment Restoration, Phase 1 (TE-25) CWPPRA 2000 East Timbalier Island Sediment Restoration, Phase 2 (TE-30) CWPPRA 2000 West Belle Pass Barrier Headland Restoration (TE-52) CWPPRA 2012 Bayside Segmented Breakwaters at Grand Isle (BA-50) CIAP 2012 Funded for Construction Caminada Headland Beach and Dune Restoration (BA-45) (under construction) Future Projects Barataria Basin Barrier Shoreline (BBBS) Restoration (BA-10) Eastern portion of Caminada NRDA (proposed) Caminada Headland Beach and Dune Restoration, increment 2 (BA-143) (under design) CIAP/ Surplus 2014 LCA 36 | P a g e
According to the BICM data through 2005, the projected YODs for these islands are 2056 (Timbalier), 2138 (East Timbalier), 2867 (Grand Isle), and 2044 (Grand Terre). A more recent study including post-BICM data reports disappearance date by island and suggests much sooner rates of disappearance for Timbalier (2044) and East Timbalier (2018) islands. 4.3.1 Timbalier Island The land area over time for Timbalier Island is plotted in Figure 28. It is noted that Timbalier Island was the site of a breach repair project in 1996 which may have contributed to the upward trend in land area between 1990 and 1998. The island was restored through CWPPRA project TE-40 in 2004. The pre-restoration YOD was projected to be 2043. Post-restoration, the YOD was projected to be 2044. It is noted that Hurricanes Katrina, Rita, Gustav, and Ike caused significant land loss on Timbalier Island between 2005 and 2008 (Rodrigue et al., 2011; Martinez et al., 2006). As such, it is expected that the land loss rate would have accelerated, and in absence of the 2004 restoration project, Timbalier Island would have disappeared significantly sooner than the 2043 projection. Figure 28. Timbalier Island Land Area Change Analysis (CEC, 2012) 4.3.2 East Timbalier Island The land area over time for East Timbalier Island is plotted in Figure 29. The island was restored through CWPPRA projects TE-25 and TE-30 in 2000. The pre-restoration YOD was projected to be 2014. Post-restoration, the YOD was projected to be 2018. It is noted that Hurricanes Katrina, Rita, Gustav, and Ike caused significant land loss on East Timbalier Island between 2005 and 2008 (Doran et al., 2009; Martinez et al., 2006). As such, it is expected that the land loss rate would have accelerated, and in absence of the 2000 restoration projects, East Timbalier Island would have disappeared significantly sooner than the 2014 projection. 37 | P a g e
Page 1 and 2: BARRIER ISLAND STATUS REPORT Fiscal
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Page 27 and 28: will be implemented in the project
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Page 35: Figure 25. Whiskey Island Land Area
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Page 43 and 44: Hurricanes Katrina and Rita, all of
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Page 53 and 54: 6.0 References Baldwin, W. E., Pend

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