I wondering if someone can advise me properly. We alot of rain
( approx 7 inches) in a weeks time, after this rain I noticed a 6 inch
round sink hole in my driveway. This sinkhole has now expanded to 3 ft
wide by 3 1/2 ft deep. The contractor responsible came to fix it and
dug the sink hole by hand 6 ft down and then filled it with gravel. He
stated that it was a natural spring that got to much water in it
etc.... My question is what is the proper way to control this issue?
since I believe the problem can occur again ( off course the builder
says no way). What is the PROPER WAY to assure myself this will not
happen again? THANK YOU FOR ANY ADVICE THAT YOU HAVE ON THIS MATTER
On May 16, 10:56 am, firstname.lastname@example.org wrote:
PLEASE DONT SHOUT!
If it is indeed a sinkhole and sounds like it might be, you may well
have a much larger problem brewing. I'd recommend contacting city/
county building department and ask about prevelance of sinkholes in
the area in which you're located as a start. Many areas are riddled
w/ underground caves and if it's a limestone formation, these can open
up to swallow houses and, in an area in TN where we were, about half
of a relatively new subdivision (about 20 houses were either
completely lost or condemned iirc).
It's possible it was just a small spot and the corrective action may
be enough and it won't come back, but if it were me, I'd do some
serious investigating of the geology in my neighborhood rather than
just hope it's ok...
Sometimes after determining where the extent is, they area can be
stabilized by pouring concrete down to fill a relatively small void.
If there happens to be a large cavern, it may be impractical to
If it's truly an underground spring, then filling it in won't solve
anything - the water has to go somewhere and if it can't go there it will
pop up somewhere else (maybe somewhere by your foundation???). If it were
me, I'd fill it with gravel and/small rocks and see what happens next time
it rains. I wouldn't sink too much cash into it until you see how it'll
play out - might have just been a freak occurrance.
Having our own crop of sinkholes...
It depends a great deal on exactly what's going on. Is it really
a spring? Or, is it a channel from an underground stream meandering
over bedrock or...? The contractor would probably say "spring" no
matter what it is because it's simpler for a homeowner to understand.
Our bedrock is 4-7' down under sand. We have several
"lines" of sinkholes. One of them came close to swallowing our
garden tractor and trailer... One line extends across the country
road, and a few years ago, a sinkhole opened up in the middle (entrance
hole in asphalt was only 6" across, but it was several feet deep and
wide underneath the asphalt).
We understand this to be lines of water runoff thru the sand, just
on top of the bedrock, slowly taking sand away with it. Eventually
it breaks through.
If you're on bedrock, especially if you have very light/sandy soil,
that's probably what you have. Filling with gravel and packing
it will probably make the problem go away long enough for you
to not care about it. This is all they did with the road.
On our property, we had a backhoe in to do some work, and
given he needed to get some sand, he got it from the sink
hole area, and re-leveled/graded one area of sinkholes to see
if that would do the trick. After 15 some years, the sinkholes
haven't recurred in that spot.
Aside from that, you might want to talk to someone in your
municipality. They probably have someone who'll know your
conditions well enough to make an educated guess.
Age and Treachery will Triumph over Youth and Skill
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