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after the eruption of Mount St. Helens in 1980, a team of dredges had to work day and night to clear debris from the Columbia River. When they were finished, they’d collected enough material to fill a football field nearly seven miles high.
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Fun Fact: after the eruption of Mount St. Helens in 1980, a team of dredges had to work day and night to clear debris from the Columbia River. When they were finished, they’d collected enough material to fill a football field nearly seven miles high.
Source
portofportland.com
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