My wife and I purchased
a new home and had concerns that our 20 month old
son would trip and be injured because of 2 rocks
that were sticking out of the ground in our
I attempted to dig
around the rocks with a shovel and a pick ax but
soon realized the rocks were too large for me to
remove without assistance.
We contacted a local excavation contractor who
attempted to unearth the rocks with his CAT 580
backhoe. It turned out the part of the rocks that
we could see were just the tip of the ICEBERG.
The rocks measured 22' X
14' and 16' X 10' with a depth of 6' - based on the
size, the excavator was unable to remove them with
the backhoe. He suggested a hydro-hammer at an
additional $1200 / day (a real bargain) to be used
to break the rock so that the backhoe could remove
We decided to only take
the top 2' off of the rocks with the intention of
covering with topsoil and grass.
The excavator said he
would check on the availability of a hydro-hammer
and would get back to us in a day to let us know
when he could finish the job and what the additional
costs would be.
We were greatly
surprised when he arrived at our house the next
morning with a cost saving alternative- it seems his
father (original owner of the business) told him he
should try DEXPAN since they had a full pallette of
DEXPAN II in their shop from a prior concrete /
rebar excavation that he had done a few years back.
The son was unsure of
the possibility of success and asked us if we wanted
to try it. (anything was better than an additional
$1200). Only one problem- the excavator was very
busy and was unable to drill the rock for at least
another week based on his schedule.
SO I DID IT AS A HOME
OWNER! I rented a Ingersol-Rand compressor, rock
drill and 1 1/2" bit and
after 3 hours all of the holes were drilled.
After drilling the
rocks, mixing the DEXPAN (according to your website
directions) and pouring into the drilled holes, we
had success as you can see in the attached photos.
BUT that is not all- we
were not only able to remove the top 2' of the rocks
but based on how well the rocks cracked were able to
remove the entire rock and am now putting in an
Thank you for a great