Dredging river bottoms for sand is a major cottage industry along rivers in Vietnam. These boats are on the Perfume River just upriver from Hue. The river dredging operation relies on manual labor. We passed the boats too fast to completely digest the full operation, but this video shows a quick glimpse. It seems to involve a couple of people at a paddle wheel sort of spindle and a long pole that gets raised and dropped.
Each river boat is a family enterprise with everyone on the boat helping out in the operation. Sand is then barged downriver to riverside concrete factories where concrete blocks are made and sold to the fast growing construction business.
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