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Clamshells Reach Deep

Published Tuesday, August 15, 2006

The dredge at Capitol Sand & Gravel is one of 65 custom Rohr dredges operating nationwide. Rohr manufactures bucketladder dredge, catamaran floating dredge and luffing-jib floating clamshell dredge systems. But when aiming for depth, the traditional floating clamshell is the way to go. Capitol Sand & Gravel can reach depths of 200 feet, which allowed them to discover additional material. And operations can go as deep as the deposit allows, Rohr Vice President Chris Nelson says. The company currently is retrofitting a twin clamshell in Southern California to dig 300 feet. The biggest, most aggressive ...

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