![]() Since 1891, the MCR has been dredged to facilitate safe passage of large commercial vessels. ![]() Before the inlet was improved for navigation in the early 20th century, passage from the river mouth to the ocean was so treacherous that the area was known to mariners as the “Graveyard of the Pacific”. Visit Media to see details.Ĭolumbia River mouth bathymetry from USGS data releaseĪt unaltered river deltas, processes such as wind, waves, and currents distribute this sediment across adjacent coastal areas-some will be deposited onshore and in nearshore environments, while some is transported further offshore.īut the Mouth of the Columbia River (MCR), like most major inlets around the world, is engineered for shipping traffic, with rock jetties that concentrate its flow into navigable channels.
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