West Coast
Manson Construction Company

WA - Under Construction: The Largest Hopper Dredge in America

Manson Construction Company, headquartered in Seattle, Wash., turned heads last fall when it announced that it would be building the largest U.S.-flagged, self-propelled hopper dredge in the United States.

Manson Construction Company, headquartered in Seattle, Wash., turned heads last fall when it announced that it would be building the largest U.S.-flagged, self-propelled hopper dredge in the United States. The company, which builds ferry and cruise terminals, bridges, and so on, contracted with Keppel AmFELS to build the giant dredge, named the Frederick Paup, at its Brownsville, Texas, shipyard.

When putting our bids for the construction of the dredge, Manson had discussions with around seven shipyards. “Ultimately, we decided that Keppel AmFELS was the best alternative for us,” says Henry Schorr, who oversees Manson’s dredging division and who has been fundamental in the design and construction process of the dredge. “We were pleased with their capability and professionalism and look forward to them delivering a superb vessel.”

At 15,000 cubic yards, the dredge—designed in collaboration with Hockema Whalen Myers Associates Inc. (also of Seattle)—has a length of 420 feet, a breadth of 81 feet and a draft of 28.5 feet. Schorr says that once the design package was essentially complete, Manson approached the shipyards and made the decision as to which shipyard would be utilized.

“Hockema worked closely with Manson in the overall design of the vessel, including the review and selection of the engines,” says Schorr. The group selected Wabtec engines.

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