Many times there are drops/sinkholes/cave-ins around water holes. I think that is the reason that "THEY" are careful in making man made "lakes" or deepening existing ones.
Frequently the drain tile will cause ...to me.....unusual settling. There was a thread on this some time ago in St. James. I will see if I can find it.
New Sinkhole in St. James on Edenville Path.
Also, during the summer rainy season here, there will be sinkholes as sure as God made little green apples.