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More teeth . . . price per? And here’s a puzzle to savor . . . what connection is there between this machine and the 1893 Chicago’s World Fair aka Columbia Exposition? What connection is there between this machine and the mid-1950s arrival of German sub U-505 at its current location? Answers follow.
another taken while docking there yesterday. Imagine the innards? This vessel launched in 1954 from National Steel and Shipbuilding of San Diego.
In the current operation, bedrock dislodged by the 30ish rpm cutter head gets scooped out by an excavator (see a future post). But in other projects, this pump can draw out loosened materials and blow them onto land. The diameter of this pump is . . . . pretty big.
Now those questions at the beginning, Great Lakes Dredge & Dock began as Lydon & Drews, and they provided the “shoreline” for the Columbian Exposition. Also, GLDD, as it was called in 1954, assisted in moving the U-505 into its current location at the Chicago Museum of Science and Industy. Cost of teeth . . .sooon.
All fotos by Will Van Dorp.