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The Khyex River landslide of November 28, 2003, Prince Rupert British Columbia Canada
Authors:Email author" target="_blank">James?W?SchwabEmail author  Marten?Geertsema  Andrée?Blais-Stevens
Institution:(1) Research Geomorphologist, B.C. Ministry of Forests, P.O. Bag 6000, VOJ 2NO Smithers , BC Canada;(2) Research Geomorphologist, B.C. Ministry of Forests, 1011 4th Ave. Prince George, V2L 3H9, BC Canada;(3) Research Scientist, Geological Survey of Canada, 601 Booth Street, K1A 0E8 Ottawa , ON Canada
Abstract:On November 28, 2003, at about 00:30 PST, 35 km east of Prince Rupert in northwestern British Columbia, an extremely rapid, retrogressive liquefaction earth flow, or a clay flow-slide, severed the natural gas pipeline. As a result, Prince Rupert residents were without natural gas heat for 10 days. The landslide has a steep main scarp that is 45 m high by 345 m wide. It consists of glaciomarine sediments mantled by rubbly colluvium lying on, and against smooth bedrock of the valley wall. It covers an area of 32 ha, and displaced about 4.7 M m3 of material. This displaced material flowed up and down river over a distance of 1.7 km, blocked the river, and caused flooding upstream for a distance of 10 km. This landslide is the most recent of four large landslides that have occurred over the last four decades in glaciomarine sediments in northwestern British Columbia.
Keywords:Earth flow  Clay flow-slide  Glaciomarine sediment  Canada  British Columbia  Khyex River  City of Prince Rupert
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