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As Compensatory Mitigation for the construction of the Reach F Levee of the Morganza to the Gulf Hurricane Protection Project, the Terrebonne Levee and Conservation District is required to construct approximately 140 acres of new brackish marsh habitat in Terrebonne Parish. This marsh creation project was constructed in conjunction with other required mitigation projects in order to achieve cost savings through reduced mobilization costs and other combined savings.
The design of this project includes a borrow areas located within the Houma Navigation Canal (HNC), from which the material will be hydraulically pumped to multiple, fully contained, fill areas adjacent to the HNC and other levee reaches in the Morganza Project. DCC incorporated CPRA’s ‘Marsh Creation Design Guidelines’, optimum marsh inundation elevation and relative sea level rise, along with geotechnical considerations of sub-soil and marsh-fill consolidation and compaction to determine the optimal target marsh elevation for the project. This will help ensure that the design life for the project of 20-years is achieved.
Terrebonne Levee and Conservation District
Terrebonne Parish, Louisiana
Planning
2020
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