Post-Hurricane Rehabilitation
The project consists of two distinct functional elements; one is to increase the storage volume of a Placement Area and the second is to repair damage and remove debris associated with two Placement Areas to the Pre-Hurricane conditions. The first element of work includes raising the levees around the Placement Area to increase storage capacity for at least another three dredging cycles (3 to 5 million cubic yards per cycle). This involves placing 875,000 cy of material. The second element involves removing 100,000 cy of organic and non-organic storm debris as well as reconstructing approximately 10 miles of two lane asphalt road damaged by Hurricane Katrina
Shoreline Nourishment Project
Performed a four-day value engineering study of this beach restoration project south of San Diego, California. The project placed quality beach fill material to build a base (450,000 cubic meters), together with a sacrificial beach fill (764,000 cubic meters) for a total placement of 1,214,000 cubic meters. The fill area is 2,165 meters long with a base nourishment beach width of 12 meters; the sacrificial beach width is 20 meters. Materials for the beach fill will be imported from an offshore borrow area. The VE team proposed six recommendations which range in savings from just under a million to almost $8 million in life cycle costs. One recommendation was provided which would extend the duration between renourishment cycles thus reducing the life cycle costs. The team reviewed the proposed benefit analysis and validated the approach to use a sacrificial fill in front of the minimum beach width. This Value Engineering study generated over $10 million in savings.
Dredging Placement Area Expansion
This fast track project to provide additional capacity in disposal areas for dredge spoil excavated from a major shipping channel. Capacity was developed by efficiently connecting the existing placement areas and developing beneficial use areas. The team recommended changing levee alignments to achieve a potential cost reduction of 29%. Moreover, the team also recommended changes to construction methods yielding substantive value improvements in the storage capacity of the placement areas and simultaneously improving the diversity and sustainability of the intertidal marsh habitat in the beneficial use areas. The team’s recommendations decreased the project’s risk in by the uncertainty associated with soft foundations is decreased.
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