Sinkholes Plague Florida by the Thousands
And people are sometimes to blame
By Neal Colgrass, Newser Staff
Posted Mar 2, 2013 2:30 PM CST
In this July 13, 1994 file photo, a cavernous hole, 106 ft. wide by 185 ft. deep, opened in the center of an IMC-Agrico waste stack near Mulberry, Fla.   (AP Photo/Selbypic)

(Newser) – Giant sinkholes like the one that swallowed a Florida man this week aren't so rare as you might think—and are sometimes caused by human behavior, the Christian Science Monitor reports. About 15,000 exist throughout Florida, most of them appearing slowly over a period of years while groundwater erodes the limestone bedrock above an underground cavern. Occasionally a catastrophic sinkhole suddenly appears and takes someone with it; the state has three sinkhole fatalities on record.

Damage from sinkholes has grown so costly for Florida insurance companies that they successfully lobbied for a new law, making it more difficult to claim sinkhole damages. The scary part: People sometimes create their own sinkholes with construction work (like well-drilling) and agricultural irrigation. How to spot one coming? Geologist Anthony Randazzo tells NPR that there are tell-tale signs, like "you begin to develop cracks in masonry structures." But with catastrophic sinkholes, look for "cracking and ground-tilting or floor-tilting, doors won't open or will get stuck, windows will not be able to open properly." Click for more on the latest sinkhole.

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Mar 3, 2013 2:36 PM CST
It's too easy to say that Florida is just one big, I'll say it anyway.,..
Mar 2, 2013 11:17 PM CST
Let's put this into perspective... "the state has three sinkhole fatalities on record.". Let's repeat that... in all of Florida, since they've been keeping records, THREE people have died in sinkholes. How many die in traffic accidents every day? There is this, however ... We're taking more water out of our aquifers to satisfy the needs of a growing population than naturally seeps back in. In some places near the coast, sea water is displacing removed fresh... but in other places, the slow erosion of limestone is a completely natural, normal process that's been going on for a very very long time. Florida's bedrock is limestone of varying age, consistency and porousness. _WhateverYouSay, Florida.
Mar 2, 2013 10:52 PM CST
The Builders Lobby made it so that the Builder no longer has to take ground soundings for Potential Sink Holes. Private Builders and Buyers should request one Before Signing the agreement to purchase or build. I believe the Counties might have such information available. ~Rick Magee, FL