14 June 2018

Rattlesnake Ridge: new drone footage of the development of the landslide

Posted by Dave Petley

Rattlesnake Ridge: new drone footage of the development of the landslide

The WADNR has released a good video, captured by a drone on 31st May, showing the development of the Rattlesnake Ridge landslideThis video is available on Youtube and should be embedded below:-

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As expected by those responsible for monitoring the landslide, it has continued to creep over the last few months, and judging by the images it has now displaced by a few metres:-

Rattlesnake Ridge

Displacement of the Rattlesnake Ridge landslide at Union Gap in Washington State. Still from a drone video released on Youtube by WADNR.

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Note the displacement of the tracks across the landslide, which give a good indication of the total movement of this part of the landslide.  The slide has now formed a very clear head scarp (actually a double scarp, which is not unusual):-

Rattlesnake Ridge

The double headscarp of the Rattlesnake Ridge landslide. Still from a drone video released on Youtube by WADNR.

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The WADNR continue to monitor and manage the landslide, and they have a good website that provides details of their activities.  I hope that in due course we will see a range of peer reviewed publications analysing the movement dataset that they are collecting.