Quote:
Originally Posted by Happydaz
A cavern below a leaking sewer line may have dissolved some of the underground limestone and caused the surrounding soil to fall into the hole created by the dissolving limestone. Another name for that is a sinkhole.
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Not really!
Other subterranean events can cause holes, depressions or subsidence of the land surface that may mimic sinkhole activity. These include subsurface expansive clay or organic layers that compress as water is removed; collapsed or broken sewer and drain pipes; broken septic tanks; improperly compacted soil after excavation work; and buried trash, logs and other debris. Often a depression is not verified by a licensed professional geologist or engineer to be a true sinkhole, and the cause of subsidence is not known. Such events are called subsidence incidents.
Sinkholes | Florida Department of Environmental Protection