Y--Mississippi River, Baton Rouge to Gulf of Mexico, Louisiana FY 2012 Cutterhead Dredge Rental, Saltwater Barrier Sill, Plaquemines Parish, LA OM-12-135

Contract W912P8-12-B-0043, issued by the Department of Defense through the US Army Engineer District New Orleans, involves the rental of a cutterhead dredge for the construction of a saltwater barrier sill in Plaquemines Parish, Louisiana. The project is located on the Mississippi River between Miles 63.0 and 64.0 above Head of Passes, specifically in waters deeper than -45 feet NGVD. The scope of work requires the contractor to hydraulically dredge material from a designated river bottom borrow area and place it to form a sill with a maximum settled height of -45 feet NGVD. To achieve this, the contractor must utilize a spill barge equipped with a submerged vertical pipe capable of delivering material to elevations between -45 and -60 feet NGVD. The project follows previous construction specifications, which featured a sill approximately 1,600 feet in length with a bottom width of 1,000 feet and a crown width of 120 feet. Bids for the contract, which included pricing for mobilization, dredging hours, and towing services, were submitted by Mike Hooks, Inc., Great Lakes Dredge & Dock Company, LLC, and Weeks Marine, Inc. The award notice was posted on August 10, 2012, under NAICS code 237990.