This is a picture of a sinkhole from one of my neighbor's yards. There were a total of 5 sinkholes in these two yards!

The sink-hole was at least 50 feet deep, and it swallowed entire trees, including a classic mustang.

The Valley View side of the bank has more sinkholes than the Eastmont side. I can take some pictures of the existing sink-hole if you think that it may be useful. Here are the relevant past articles found in the news: