We have had a what appeared to be a sinkhole along side our backyard, in an area we don't use. I am guessing the ground started to sink a about 3 years ago, but could have been longer. I recently noticed the indention had grown larger and then this week, it actually caved in a bit. After a brief search on the internet, I checked inside the hole and we are pretty sure it is not due to a hole the home builders dug to bury trash and debris. It also doesn't seemed to have any water in it, so it doesn't seem to be due to a water main leak.
As the hole is getting larger and spreading closer to the house than I would like, I need to get this looked into. It seems that landscape companies can take care of this, and it looks like it can get rather expensive. Anyone have any experience with fixing sinkholes? My husband is guessing this could cost $10,000, although that is truly a guess.