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A dipper dredge is a floating machine used for underwater excavation. It is essentially a power shovel mounted on a barge. Its distinctive features include a bucket attached to an arm, supported and guided by a boom that can move in a wide arc.12

Dredging itself is performed for several key purposes:
* Maintaining or creating deeper channels in waterways.2
* Creating new land by raising low-lying areas.2
* Constructing dams and dikes.2
* Recovering valuable underwater materials.2

Dipper dredges, along with other types like grab, ladder, scraper, and hydraulic dredges, are crucial tools for maritime civil engineers in maintaining navigable harbors and developing sea works.23

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