Another quick video of the liquid earth. This is one of the coolest things I have ever seen on a job. The dirt was literally moving in waves as you can see. Be sure to watch in HD for the best picture.
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What this is, is someone filled in an old in ground swimming pool with clay and didn’t punch a hole in the bottom to let any surface or rain water escape, so over time the clay became extremely saturated. When I drove the mini excavator over it the clay began to “pump” or liquify and this is what happened. I have seen soil liquefaction before but never to this extreme.