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View Diary: Massive landslide on Whidbey Island as long section of bluff slides into Admiralty Inlet (133 comments)

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  •  In many areas.... (1+ / 0-)
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    Penny GC

    over the years, manmade developments filled in streambeds or channeled them underground.  Some got forgotten, but flowing moisture answers primarily to gravity.  So does soil and rock on a sloping grade.

    One great place to see this graphically is driving along I-80 in northern CA, say between SF and Sacramento.  The hillsides along the highway are fairly rounded and steep and you can easily see spots both fresh and more ancient, where big chunks of a hillside have "slumped" downward.  This usually happens after wet winter seasons and the slumps may often happen well after the rainy season ends, not just during it.

    Under the right conditions, the runouts can be lengthy and the damage pretty devastating if there is property in the path.

    Free markets would be a great idea, if markets were actually free.

    by dweb8231 on Thu Mar 28, 2013 at 11:13:56 AM PDT

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