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Dredging: A Complex technique

Hydraulic fill dams are hellacious things to build. That's why there are so few of them. But with a dam the size of Fort Peck-the entire populace of the state of Tennessee could stand on the surface of the dam and not rub shoulders-it was deemed that conventional earth-moving devices couldn't do the job. Another consideration was that by dredging from the upstream area, the lake could then be larger. To build from hydraulic fill meant that huge pumps would be needed to scoop and suck a watery mixture of sediments from the bottom of the river on both the upstream and downstream sides of the damsite. That material would then be poured through a pipeline to the damsite. Where would they acquire dredges, booster barges, (continued...)


updated: 2005-02-15

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