Sink Holes again in Calumet Grove?
 

The pond behind the Calumet Grove Post office is dry again with what looks like sink holes. Any information?

Few of these around villages, Lopez Courses has two that I aware of? IMO Guess liner starts leaking and leak works it way down to cavity hole. Water escapes in underground springs. IMO did notice they was transferring pond water to lower the retention ponds few days before which might of contributed? IMO As long as it contained to retention ponds and don’t expand out.