I live in Florida (aka the land of sink holes). Due to the flat nature of my area, it is common place for housing developments (and any developments really) to dig large drainage areas to give water a place to go other than the newly constructed buildings. In the case of my neighborhood that means that a large depression was dug to drain water from the land where all the surrounding houses were built. The drainage area is roughly square, probably 50 meters by 50 meters in size, and about 4-5 feet deep (I'm pretty sure this is a common practice, even in less-flat areas). In our case houses are built surrounding it in a big "block", and my house backs up to it.
It's covered in grass and well maintained, so I take my kids back there to run around semi-regularly. We bought our house about 6 months ago, and about 3 months ago a large sink hole opened up in this drainage area. Large in this case means that it is probably 2 meters deep at the deepest point and has an overall diameter of about 5 meters. It's on the other side of the drainage area so it isn't right next to my house, but it's certainly not far. We also recently found a second (and much smaller) hole - approximately 20 centimeters in diameter and 20 centimeters deep. This small one is much closer to my back yard.
Of course I'm definitely interested in this sink hole as it pertains to my house (aka does this imply that this area may be prone to sink holes), but I'm also curious about these things generally. To keep it to a simple question, I'm wondering if this is a sink hole that opened up like all other sink holes in Florida - aka a collapsed underground hole/cave that just happened to miss all the surrounding houses? Or is it possible that this is a local affect, aka something about these drainage areas can lead to sink hole formation, implying no immediate concern to the surrounding houses? I realize this is probably not an answerable question for my specific sink hole, but I thought people here might have some insight into whether or not drainage areas might cause their own sink holes.
In case it isn't clear, this drainage area has no drain point itself. During heavy rain, water flows into the drainage area and then slowly evaporates or percolates into the ground. In case it matters, when it does rain, water typically collects on the opposite side of the drainage area than the side which contains the sink hole. I.e. the sinkhole is on the "high" side of the drainage area (although the elevation difference probably isn't more than a dozen centimeters).