Sinkholes are a
common feature of Florida's landscape. They are only one of many
kinds of karst landforms, which include caves, disappearing
streams, springs, and underground drainage systems, all of which
occur in Florida. Sinkholes form in karst terrain principally
from the collapse of surface sediments into underground cavities
in the limestone bedrock. Slightly acidic ground water slowly
dissolves cavities and caves in the limestone over a period of
many years. When the cavity enlarges to the point that its
ceiling can no longer support the weight of overlying sediments,
the earth collapses into the cavity. There is no way to prepare
your home for a sinkhole, however, below are some FAQs about a
common Florida problem.
Is there a safe area
of Florida in which to live with no chance of sinkholes?
- Technically no. Since the
entire state is underlain by carbonate rocks, sinkholes
could theoretically form anywhere. However, there are
definite regions where sinkhole risk is considerably higher.
Is there a government agency that
will come and inspect my sinkhole?
- There is currently no agency
with responsibility and authority for sinkhole inspections
in Florida. Often the Florida Geological Survey (FGS)
receives calls from homeowners all over the state who have
had the unfortunate experience of sinkhole. The Florida
Geological Survey maintains a database of reported sinkholes
which is available through the FGS Web site. If a sinkhole
is threatening your home, immediately contact your insurance
company.
I think I do have a
sinkhole in my yard. What should I do?
- Small sinkholes often
require only filling with clean sand or soil. If the hole is
under or very near a structure or swimming pool, your
property owner’s insurance may cover assessment and repair.
Mark and secure the hole and keep children and pets away. If
the hole is directly impacting a house, and sinking,
sagging, or cracking walls are apparent, stay out of the
house. Call your property insurance adjuster and report it
immediately.
How long does it
take for the sinkhole to stop growing?
- Slumping of the sediments
along the sides of the sinkhole may take approximately a
day’s time to stop. Erosion of the edge of the sinkhole may
continue for several days, and heavy rainfall can prolong
the stabilization. In the less catastrophic cover subsidence
type of sinkhole, a bowl-shaped depression forms at the
surface, typically over longer periods of time (sometimes as
long as years).
I am buying a new
home and I want to know if there is a sinkhole disclosure law?
- Most real estate seller’s
disclosure forms used in Florida today include a sinkhole
disclosure statement. Sometimes it is overlooked. If it is
in question, be sure to ask
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