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Mud/debris flows ruin substantial improvements with the force of the flow itself and the burying or erosion of them by mud and debris. The heavy mass pushes in walls, removes buildings from foundations, fills in basements and excavations and sweeps away cars, trucks heavy equipment and other substantial objects. Boulders and trees swept along by the muddy mass demolish buildings, flatten fences and utility poles. In mountain areas, portions of valleys have been eroded to a depth of several feet by the flow process.
Last Updated: 12/26/2012 2:41 PM 
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