Toutle River Valley - Mt. St. Helens

James Anderson

Joined April 2010

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Artist's Description

Mt. St. Helens is a stratovolcano and when it erupted May 18, 1980, at 8:32 am the debris avalanche and mudflows buried the Toutle Valley to a depth of almost 50 meters. The eruption lasted for 9 hours where 57 people lost their lives, or are still considered missing, 250 square miles of land was damaged, “Countless” animals were killed – estimates are 7,000 big game animals and millions of birds, fish, and small mammals. The May 18, 1980 eruption of Mount St. Helens and subsequent lahars poured vast amounts of sediment into the Toutle River Valley, which was formerly navigable. The US Army Corps of Engineers dredged 85 million m³ (110 million yd³) of sediment from the river and built the US$65 million Sediment Retention Structure on the North Fork of the Toutle to keep it clear in the future. Part of the same engineering works is a tunnel to drain Spirit Lake whose natural outlet was blocked by the eruption, Toutle River Valley, Mount St. Helens, Washington

3 HDR image processed in Photomatix, cropped and sharpened in PSP x3

Artwork Comments

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desktop tablet-landscape content-width tablet-portrait workstream-4-across phone-landscape phone-portrait

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