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Jetties at the Mouth of the Columbia River 11 лет назад


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Jetties at the Mouth of the Columbia River

An aerial video shot from a helicopter of the Mouth of the Columbia Rivers jetty system. The U.S. Army Corps of Engineers, Portland District, builds and maintains this system, which provides safe passage for vessels entering the Pacific Ocean or returning. Construction took place from 1885 - 1939, and is one of the largest jetty systems along the U.S. West Coast. The system consists of three rubble-mound jetties totaling NINE point SEVEN MILES! Been built on massive tidal shoals and designed to minimize navigation channel maintenance and provide safe transit between the Pacific Ocean and the Columbia River.

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