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1 March 2011 Feasibility Study Analysis for Riverine Sand Mining/Scofield Island Restoration
Michael Poff P. E., Aaron Bass, Rachel Sweeney, Kenneth Bahlinger, Maury Chatellier
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Abstract

A detailed feasibility study was performed to evaluate mining and transporting sand from the Mississippi River to restore Scofield Island, a rapidly-deteriorating barrier island in Plaquemines Parish, Louisiana. The proposed ecosystem restoration project includes reconstructing the beach and dune overtop the remaining island framework and closing existing breaches with riverine sand; and utilizing mixed sediments from an offshore mixed sediment source to construct a back-barrier marsh platform to create and sustain natural resource habitats and serve as the rollover platform for overwash sand. Studied and evaluated were the sand sources in the Mississippi River; methods for excavating and transporting the sand to Scofield Island; conveyance corridors from the river to the island; potential environmental and socioeconomic impacts; and estimated costs for various combinations of the aforementioned. Evaluation of eight alternative combinations of sand sources, excavation methods, and conveyance corridors on the basis of sixteen controlling factors and impact issues resulted in the recommendation of two riverine borrow areas and one conveyance corridor along an existing navigation waterway.

Michael Poff P. E., Aaron Bass, Rachel Sweeney, Kenneth Bahlinger, and Maury Chatellier "Feasibility Study Analysis for Riverine Sand Mining/Scofield Island Restoration," Journal of Coastal Research 2011(10059), 235-245, (1 March 2011). https://doi.org/10.2112/SI59-025.1
Received: 30 September 2010; Accepted: 15 June 2010; Published: 1 March 2011
KEYWORDS
and river navigation
beach nourishment
borrow area design
coastal processes
cutterhead and hopper dredges
ecosystem restoration
Mississippi River
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