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 Precision Drilling & Blasting |
A Precision Drilling and Blasting Company
Centerton Sanitary Sewer |
You drill closely spaced holes in rock. You
calculate the amount of rock and the weight of the rock for every hole in the
pattern. You log the elevation of the rock and you log the exact location
of every layer and seam in the rock. You then match an explosive with
characteristics that best suits the application. Then you calculate the
available energy that the explosive is capable of, then you calculate how much
it will take to perform the
desired rock fragmentation. You take into account every piece of available
information that you can acquire in your shot design. Then you calculate
the weight of the material on top of the rock, if any, and you factor that into
the equation. You do this for each and every hole in a blast pattern.
Then you measure the distance to any structures that may be close to your work.
That measurement factors into your blast design in a big way. Every single
hole within the pattern is treated like an individual shot all to itself.
You load each and every hole with a specific amount of explosive and you do this
with as much attention to detail as humanly possible. You strive for
perfection in every hole within the blast pattern. This is called
Precision Controlled Rock Blasting.
In Centerton, Arkansas, J&L Construction had the contract for the construction of the Centerton Sanitary Sewer Line. One blasting contractor had already given up on this one. J&L Construction contacted Jared Redyke of Dykon Blasting Corp. Jared took a trip to Centerton to evaluate the project.
The
rock was under about 6 feet of dirt and clay. That was the good news.
The bad news was that there was an operational fiber optic phone line, a 900
pair telephone line and a 350 psi gas line near the sewer trench. These
lines were not all in the same place. They were on both sides of the sewer
trench, fully operational, and less than 5 feet from the center of the sewer
trench. The natural gas line supplied all of Centerton and part of
Bentonville, Arkansas with gas. The utility people estimated close to ten
thousand homes would be effected if service was interrupted. The phone
lines serviced among the residents, a Walmart Supercenter and several other
businesses in the area. A fiber optic line is bad to blast around under
any circumstances. You can't splice a fiber optic line back together.
It has to be replaced from junction box to junction box.
In every job evaluation, there has to be a consideration to risk. This risk evaluation first goes to the safety of the public and all surrounding property. Second to this is the risk evaluation to the owner of the project, the contractor working for the owner, other contractors working onsite, and to our blasting company. This blasting job wasn't high profile. No one hardly even knew it was going on.
Jared made the decision that we would mobilize on
the project, start at the point where the nearby utility lines
were the furthest away, moving toward the areas of highest concern. It was
agreed upon by both the Utility Contractor and Dykon Blasting Corp., that if the
project reached a certain point that it was evident that it could not be done
without damaging these utility lines, that we would cease blasting and the rock
would have to be removed by mechanical means.
In the end, the entire remaining rock within the sewer trench was successfully blasted. The utility services were never interrupted at any time and Centerton, Arkansas has a new Sewer line to their treatment plant. J&L Construction worked hand in hand with us towards the blasting of this project. A finer group of individuals cannot be found and we are grateful for their trust and support to us.
We have assembled some digital pictures of this project. We invite you to take a look at what was going on in Centerton, Arkansas for about 2 weeks in the summer of 2002. Thank you for your interest in Dykon Blasting Corp.
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