GardenBanter.co.uk

GardenBanter.co.uk (https://www.gardenbanter.co.uk/)
-   Gardening (https://www.gardenbanter.co.uk/gardening/)
-   -   sinkhole! (https://www.gardenbanter.co.uk/gardening/80330-sinkhole.html)

Betsy 27-07-2004 07:02 AM

sinkhole!
 
While pulling weeds today my foot fell into a hole. I jumped back and poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior French
drain around the house at some point. This is Baltimore, theoretically clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!



Bill 27-07-2004 08:03 AM

sinkhole!
 
Call these folks and ask what to do...
http://www.mde.state.md.us/ContactUs/index.asp

For information about this, search google.com for the following words...
sinkholes Maryland



"Betsy" wrote in message
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!





JR-jred 27-07-2004 10:02 AM

sinkhole!
 
In article , "Betsy" -0
wrote:

While pulling weeds today my foot fell into a hole. I jumped back and poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior French
drain around the house at some point. This is Baltimore, theoretically clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!



Fill it in with soil borrowed from elsewhere in the yard and pack it
down tight. See what it looks like a year from now. If it has sunk
again, then it might be time to call someone.

Panic now is totally unnecessary.

--
-JR
Hung like Einstein and smart as a horse
Remove NO SPAM from e-mai address to reply

toller 27-07-2004 10:02 AM

sinkhole!
 
I have had two like that because buried over tree trunks have decayed out.
I packed dirt in, and expect to have to do it again in a couple years.

Naturally your problem could be entirely different, but it might be the
same.



Norminn 27-07-2004 12:02 PM

sinkhole!
 


toller wrote:
I have had two like that because buried over tree trunks have decayed out.
I packed dirt in, and expect to have to do it again in a couple years.

Naturally your problem could be entirely different, but it might be the
same.



I once found a hidden hole in yard, most likely from a stump that rotted
away. Our property was filled by landfill about 40 years ago
(waterfront in Florida). We also had erosion problems along the seawall
that created tunnels beneath the sod, which could have been a hazard if
someone walked on one and it collapsed.

Your city building department or insurance company may be interested in
taking a look.

One oddity I noticed during our seawall repairs was an area of clay
soil. I've seen "clumps" of it that hang together along the beach where
most of the soil is sand. When some new erosion problems appeared, the
contractor tested drainage by running water onto the clay area, and the
water drained laterally and out through the seawall about 20' away.
Apparently the top of the clay was too compact and sloped toward the
seawall, so the water drained off more rapidly than it could drain
through the clay. This link is to an article that illustrates sinkholes
rather nicely:
http://www.mgs.md.gov/esic/fs/fs11.html

I lived in a neighborhood in Florida with major sinkhole disasters.
Good time to find out whether your insurance covers them. 100 year old
house? I'd be inclined not to panic.


JenTra 27-07-2004 12:45 PM

sinkhole!
 
Be very careful about whom you call for assistance and by all means DO NOT
call your insurance Co. You may call your insurance co. when the house
falls in the hole. grin Take the advice of the previous posters and fill
in the hole and see what happens in a few months. Remember if you make this
a matter of public record you may not be able to sell your property in the
future. If you feel the need for reassurance then call a private
engineering firm to do an evaluation.



Good Luck

"Norminn" wrote in message
...


toller wrote:
I have had two like that because buried over tree trunks have decayed

out.
I packed dirt in, and expect to have to do it again in a couple years.

Naturally your problem could be entirely different, but it might be the
same.



I once found a hidden hole in yard, most likely from a stump that rotted
away. Our property was filled by landfill about 40 years ago
(waterfront in Florida). We also had erosion problems along the seawall
that created tunnels beneath the sod, which could have been a hazard if
someone walked on one and it collapsed.

Your city building department or insurance company may be interested in
taking a look.

One oddity I noticed during our seawall repairs was an area of clay
soil. I've seen "clumps" of it that hang together along the beach where
most of the soil is sand. When some new erosion problems appeared, the
contractor tested drainage by running water onto the clay area, and the
water drained laterally and out through the seawall about 20' away.
Apparently the top of the clay was too compact and sloped toward the
seawall, so the water drained off more rapidly than it could drain
through the clay. This link is to an article that illustrates sinkholes
rather nicely:
http://www.mgs.md.gov/esic/fs/fs11.html

I lived in a neighborhood in Florida with major sinkhole disasters.
Good time to find out whether your insurance covers them. 100 year old
house? I'd be inclined not to panic.




JenTra 27-07-2004 01:02 PM

sinkhole!
 
Be very careful about whom you call for assistance and by all means DO NOT
call your insurance Co. You may call your insurance co. when the house
falls in the hole. grin Take the advice of the previous posters and fill
in the hole and see what happens in a few months. Remember if you make this
a matter of public record you may not be able to sell your property in the
future. If you feel the need for reassurance then call a private
engineering firm to do an evaluation.



Good Luck

"Norminn" wrote in message
...


toller wrote:
I have had two like that because buried over tree trunks have decayed

out.
I packed dirt in, and expect to have to do it again in a couple years.

Naturally your problem could be entirely different, but it might be the
same.



I once found a hidden hole in yard, most likely from a stump that rotted
away. Our property was filled by landfill about 40 years ago
(waterfront in Florida). We also had erosion problems along the seawall
that created tunnels beneath the sod, which could have been a hazard if
someone walked on one and it collapsed.

Your city building department or insurance company may be interested in
taking a look.

One oddity I noticed during our seawall repairs was an area of clay
soil. I've seen "clumps" of it that hang together along the beach where
most of the soil is sand. When some new erosion problems appeared, the
contractor tested drainage by running water onto the clay area, and the
water drained laterally and out through the seawall about 20' away.
Apparently the top of the clay was too compact and sloped toward the
seawall, so the water drained off more rapidly than it could drain
through the clay. This link is to an article that illustrates sinkholes
rather nicely:
http://www.mgs.md.gov/esic/fs/fs11.html

I lived in a neighborhood in Florida with major sinkhole disasters.
Good time to find out whether your insurance covers them. 100 year old
house? I'd be inclined not to panic.




AustinMN 27-07-2004 02:02 PM

sinkhole!
 
Betsy screqamed out on the emergency channel:
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

snip
EGADS! PANIC! HELP!


It is probably (but not necessarily) the location of an old tree stump that
has now rotted away. Fill it in. Don't worry about it unless it
re-appears.

Austin


Wil 27-07-2004 04:05 PM

sinkhole!
 
"Betsy" -0 wrote in message
...
snip
The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!


Since your house is 100 years old why not contact your county Historical
Society to see what was on your property 100 years ago. Could be you have
an old drainage pipe or culvert or ancient sewer line long since been
abandoned that is still carrying water during high rain levels. Your
library might be of some help in finding old pictures or old town/city maps
of the area then. Or the county court house records. Even could be an old
creek that has long since dried up, filled in or could have been the city
dump.at what was the outskirts of town 100 years ago. If there was mining
of some sort in the area that would be of concern..

Wil


Wil 27-07-2004 04:05 PM

sinkhole!
 

"JenTra" wrote in message
.com...
Be very careful about whom you call for assistance and by all means DO NOT
call your insurance Co. You may call your insurance co. when the house
falls in the hole. grin Take the advice of the previous posters and fill
in the hole and see what happens in a few months. Remember if you make

this
a matter of public record you may not be able to sell your property in the
future. If you feel the need for reassurance then call a private
engineering firm to do an evaluation.


Glad you said dont call the insurance company. I did that once when a
basement wall had to be replaced. They wanted to re-inspect the house to
make sure it was still up to their standards. I had to submit pictures of
the work and get my houme owners insurance approved all over again.

wil


Warren 27-07-2004 04:52 PM

sinkhole!
 
Wil wrote:
Glad you said dont call the insurance company. I did that once when

a
basement wall had to be replaced. They wanted to re-inspect the house

to
make sure it was still up to their standards. I had to submit

pictures of
the work and get my houme owners insurance approved all over again.


Yes. Even if you're calling to ask a question about coverage, that
contact is recorded, and can count against you when it comes time for
the policy to be renewed. (Why would you be asking, if you didn't
perceive a possible risk of loss, is the justification.)

If you have questions about your coverage, read your policy. If you
don't understand what it says, consult someone other than your insurance
agent or anyone else with the insurance company.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Blatant Plug: Books for the Pacific Northwest gardener:
http://www.holzemville.com/mall/nwgardener/index.html




Bob S. 27-07-2004 05:02 PM

sinkhole!
 
"Betsy" -0 wrote in message ...
While pulling weeds today my foot fell into a hole. I jumped back and poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior French
drain around the house at some point. This is Baltimore, theoretically clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!


Don't panic! This is a very common occurence when tree trunks are
covered over and eventually decay. I step in them all the time. A
true sink hole is almost always much larger than the one you describe
(10+ ft diameter).

Bob S.

Srgnt Bilko 27-07-2004 05:02 PM

sinkhole!
 

"Betsy" -0 wrote in message
...
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!



Is it possible there could have been a septic tank or dry well near there ?
Old metal tanks rot thru and dirt will wash down in them. Even if you have
community sewer system now there could have been a septic system years back
consider the age you noted. If so, it's just a case of filling it in or for
particular folks, digging it out and then refilling. Ten feet from a
foundation is not an unusual place for a septic tank - and the pillar / post
could have been added later.




Warren 27-07-2004 05:03 PM

sinkhole!
 
Wil wrote:
Glad you said dont call the insurance company. I did that once when

a
basement wall had to be replaced. They wanted to re-inspect the house

to
make sure it was still up to their standards. I had to submit

pictures of
the work and get my houme owners insurance approved all over again.


Yes. Even if you're calling to ask a question about coverage, that
contact is recorded, and can count against you when it comes time for
the policy to be renewed. (Why would you be asking, if you didn't
perceive a possible risk of loss, is the justification.)

If you have questions about your coverage, read your policy. If you
don't understand what it says, consult someone other than your insurance
agent or anyone else with the insurance company.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Blatant Plug: Books for the Pacific Northwest gardener:
http://www.holzemville.com/mall/nwgardener/index.html




Pop Rivet 27-07-2004 06:12 PM

sinkhole!
 

"Warren" wrote in message
news:pTuNc.197098$Oq2.70620@attbi_s52...
Wil wrote:
Glad you said dont call the insurance company. I did

that once when
a
basement wall had to be replaced. They wanted to

re-inspect the house
to
make sure it was still up to their standards. I had to

submit
pictures of
the work and get my houme owners insurance approved all

over again.

Yes. Even if you're calling to ask a question about

coverage, that
contact is recorded, and can count against you when it

comes time for
the policy to be renewed. (Why would you be asking, if you

didn't
perceive a possible risk of loss, is the justification.)

If you have questions about your coverage, read your

policy. If you
don't understand what it says, consult someone other than

your insurance
agent or anyone else with the insurance company.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Blatant Plug: Books for the Pacific Northwest

gardener:
http://www.holzemville.com/mall/nwgardener/index.html




I"ve never had a problem talking to my insuran ce company
and not identifying myself but having my policy in front of
me. The last time I did that was when I was checking on my
auto and home ins about foster chiled impacts. AFTER I'd
found out it was OK, I wrote letters and made it official.
Never had a problem with that or other such dealings in CA,
Il, and now NY.

Pop





Pop Rivet 27-07-2004 07:02 PM

sinkhole!
 

"Warren" wrote in message
news:pTuNc.197098$Oq2.70620@attbi_s52...
Wil wrote:
Glad you said dont call the insurance company. I did

that once when
a
basement wall had to be replaced. They wanted to

re-inspect the house
to
make sure it was still up to their standards. I had to

submit
pictures of
the work and get my houme owners insurance approved all

over again.

Yes. Even if you're calling to ask a question about

coverage, that
contact is recorded, and can count against you when it

comes time for
the policy to be renewed. (Why would you be asking, if you

didn't
perceive a possible risk of loss, is the justification.)

If you have questions about your coverage, read your

policy. If you
don't understand what it says, consult someone other than

your insurance
agent or anyone else with the insurance company.

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Blatant Plug: Books for the Pacific Northwest

gardener:
http://www.holzemville.com/mall/nwgardener/index.html




I"ve never had a problem talking to my insuran ce company
and not identifying myself but having my policy in front of
me. The last time I did that was when I was checking on my
auto and home ins about foster chiled impacts. AFTER I'd
found out it was OK, I wrote letters and made it official.
Never had a problem with that or other such dealings in CA,
Il, and now NY.

Pop





Norminn 27-07-2004 10:02 PM

sinkhole!
 

clipped

Yes. Even if you're calling to ask a question about coverage, that
contact is recorded, and can count against you when it comes time for
the policy to be renewed. (Why would you be asking, if you didn't
perceive a possible risk of loss, is the justification.)

If you have questions about your coverage, read your policy. If you
don't understand what it says, consult someone other than your insurance
agent or anyone else with the insurance company.


OTOH, the insurance company MIGHT be interested in filling a hole before
the house falls into it :o)


David Axt 28-07-2004 12:02 AM

sinkhole!
 

"Betsy" -0 wrote in message
...
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!



Two words: Jimmy Hoffa. ;-)

DA



Jon Zone 28-07-2004 12:02 AM

sinkhole!
 

"Betsy" wrote in message
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!


No need to panic. I once had something similar. As I kept opening the top
layer of soil, a tunnel was revealed. Seems some smidgets from over 200
years ago built a smidget town underground. The city beneath the soil was
approx. 8 acres, there was evidence of tribal gatherings around a small
underground river near a railroad. Enjoy it b/4 someone fills it in.


JR-jred 28-07-2004 05:11 AM

sinkhole!
 
In article
,
"Jon Zone" wrote:

"Betsy" wrote in message
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!


No need to panic. I once had something similar. As I kept opening the top
layer of soil, a tunnel was revealed. Seems some smidgets from over 200
years ago built a smidget town underground. The city beneath the soil was
approx. 8 acres, there was evidence of tribal gatherings around a small
underground river near a railroad. Enjoy it b/4 someone fills it in.


I want some of whatever you're smoking, drinking, snorting or eating.

--
-JR
Hung like Einstein and smart as a horse
Remove NO SPAM from e-mai address to reply

Danny Isla, P.E. 28-07-2004 06:02 AM

sinkhole!
 
Call a local engineer...pick his brain for FREE.
He may have historical information about the soil characteristics in the
neighborhood.
Better to be safe than sorry.

"Bill" wrote in message
...
Call these folks and ask what to do...
http://www.mde.state.md.us/ContactUs/index.asp

For information about this, search google.com for the following words...
sinkholes Maryland



"Betsy" wrote in message
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is

no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in

that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!







Dan Hartung 28-07-2004 09:02 AM

sinkhole!
 
Betsy wrote:
While pulling weeds today my foot fell into a hole. I jumped back and poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.


Faugh. That's nothing.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.


I wouldn't worry at all, if the foundation isn't cracking and the nearby
post remains plumb.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?


Nah. Fill it in.

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior French
drain around the house at some point. This is Baltimore, theoretically clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.


Well, soil does change characteristics over time. It isn't stone! The
french drain idea does sound like a possibility. We have a similar hole,
about 2' across and originally some 3-4' deep, which was located
immediately under a garden wall. It's likely some sort of washed-out dry
well, I'd guess.

We've been using it for yard waste for a while, now, especially the
junkier stuff, short of weeds, that you don't want to compost. I
recently used the chipper on a bunch of pruning offal and the chips went
in the hole, filling it up to the top for now. (Next year it'll probably
need a little more, as that composts in place and settles.)


Wil 28-07-2004 01:02 PM

sinkhole!
 

"JR-jred" wrote in message
...
..
No need to panic. I once had something similar. As I kept opening the

top
layer of soil, a tunnel was revealed. Seems some smidgets from over 200
years ago built a smidget town underground. The city beneath the soil

was
approx. 8 acres, there was evidence of tribal gatherings around a small
underground river near a railroad. Enjoy it b/4 someone fills it in.


I want some of whatever you're smoking, drinking, snorting or eating.

No doubt practicing for the next Pulitzer. Or maybe the next Michael Miller
script. ;)

Wil


evolutionman 2004 28-07-2004 02:02 PM

sinkhole!
 
Sinkholes are formed when the underlying soil dissolves away due to
excessive water in the area.
The underlying soil is being acted on by water leaching into the area from a
direct source (underground pipe is broken) or an indirect source (runoff
from an uphill source). You mentioned that you've had lots of rain over the
past 2 years & it's near a fence post. If your back-fill soil wasn't packed
well when the post was installed, then over time, the soil around the post
(I'm assuming there's a concrete base around the post) could be slowly
dissolving away. Enlarge the area until you excavate to more solid soil,
back-fill with a clay-based soil (no gravel or organic top soil), pack well
every 6 inches of fill, and keep working the clay-based soil into the hole
untill filled.

If you should, upon excavation of the area, notice that the water has
undermined a considerably larger area than a few feet, and that the soil
consistency is becoming sandy or crumbly, then I'd call in an company to
help with the matter. They could then determine the extent of the damage
and advise you further. Good luck!!!
"Betsy" -0 wrote in message
...
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!





Betsy 28-07-2004 04:02 PM

sinkhole!
 
thanks. This is a very helpful reply. And thanks to the others as well.

Last night we had another 4" of rain! The hole isn't deeper, but along one
side it seems to be slightly undercut.

What if I poured a bucket of water in and watched it drain? Or filled it up
with water from the hose? Would that be telling me anything significant?

"evolutionman 2004" wrote in message
k.net...
Sinkholes are formed when the underlying soil dissolves away due to
excessive water in the area.
The underlying soil is being acted on by water leaching into the area from

a
direct source (underground pipe is broken) or an indirect source (runoff
from an uphill source). You mentioned that you've had lots of rain over

the
past 2 years & it's near a fence post. If your back-fill soil wasn't

packed
well when the post was installed, then over time, the soil around the post
(I'm assuming there's a concrete base around the post) could be slowly
dissolving away. Enlarge the area until you excavate to more solid soil,
back-fill with a clay-based soil (no gravel or organic top soil), pack

well
every 6 inches of fill, and keep working the clay-based soil into the hole
untill filled.

If you should, upon excavation of the area, notice that the water has
undermined a considerably larger area than a few feet, and that the soil
consistency is becoming sandy or crumbly, then I'd call in an company to
help with the matter. They could then determine the extent of the damage
and advise you further. Good luck!!!
"Betsy" -0 wrote in message
...
While pulling weeds today my foot fell into a hole. I jumped back and

poked
around it finding it "hollow" underneath. I got the shovel and started
digging, and found a void about 2 feet wide and 1 foot deep. There is

no
evidence of animal life in it, nor is there any debris.

1. How worried should I be? It is near the pillar supporting the post,
about 3 feet away, and about 10 feet from the foundation.

2. Should I leave it open and "watch" it or should I panic and call an
engineer or geologist or something?

The house is over 100 years old. There is no apparent drain pipe in

that
area, although I'm told the previous owner put some kind of exterior

French
drain around the house at some point. This is Baltimore, theoretically

clay
soil, although the soil in the hole is soft and sandy. It has been VERY
rainy for the last 2 years.

EGADS! PANIC! HELP!








All times are GMT +1. The time now is 11:41 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
GardenBanter