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How dredging has changed the Columbia River’s ecological, economic functions

14 min · 10. juni 2026
episode How dredging has changed the Columbia River’s ecological, economic functions cover

Description

THE U.S. ARMY CORPS OF ENGINEERS HAS DREDGED THE LOWER COLUMBIA RIVER SINCE THE 1860S TO CREATE A DEEPER SHIPPING CHANNEL BETWEEN PORTLAND AND THE PACIFIC OCEAN.    THE AGENCY SAYS THE PRACTICE IS NECESSARY TO SUPPORT INTERNATIONAL COMMERCE, BUT VERY FEW STUDIES HAVE BEEN CONDUCTED ON ITS ECOLOGICAL IMPACT. TRIBAL LEADERS SAY DREDGING HAS CONTRIBUTED TO THE DECLINE OF LAMPREY, STEELHEAD AND OTHER CULTURALLY SIGNIFICANT SPECIES THAT RELY ON THE COLUMBIA ESTUARY. MEANWHILE, HYDROPOWER DAMS HAVE CAUSED A PILEUP OF SEDIMENT IN THE MID-COLUMBIA, SLOWING THE RIVER’S FLOW AND RAISING WATER TEMPERATURES TO DANGEROUS LEVELS.

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Yesterday18 min
episode Hacky sack returns to its Oregon roots with national tournament in West Linn artwork

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