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Why the U.S. Built a 6.5 Mile Long Rock Wall in the Ocean
Автор: Megatrends
Загружено: 18 апр. 2025 г.
Просмотров: 503 просмотра
Описание:
A $250 million rock wall is built in the ocean at the mouth of the Columbia River to protect a vital trade route. The wall, which is a pair of jetties, helps channelize the river, preventing the buildup of sandbars and currents, and also protects ships from strong waves and storm surges.
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