The Willamette River in Oregon is a busy shipping channel. Near the mouth of the Willamette, the river is regularly dredged to keep it at least 12 meters (40 feet) deep, allowing heavy cargo ships to navigate it.

Photograph by Terry Bridges, MyShot
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river
river Encyclopedic Entry

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5-12+

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Religion, Geography, Science

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A river is a large, natural stream of flowing water. Rivers are found on every continent and on nearly every kind of land.