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The moisture issue and how it attracts roots to pipes has been known
for years. I recall Matheck discussing it and I am sure it is
documented. I have never heard of the corrosion aspect before. Ask
for some evidence showing that roots have caused the corrosion. <br>
<pre class="moz-signature" cols="72">On Behalf of Dunster and Associates Environmental Consultants Ltd.
Dr. Julian A Dunster R.P.F., M.C.I.P., ISA Certified Arborist,
ASCA Registered Consulting Arborist # 378,
PNWISA Certified Tree Risk Assessor # 1.
<a class="moz-txt-link-abbreviated" href="http://www.dunster.ca">www.dunster.ca</a>
</pre>
<br>
On 23/11/2011 7:40 AM, Ray Morgan wrote:
<blockquote cite="mid:4ECCBF9A.0935.00B7.0@regina.ca" type="cite">
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<div>As per the subject line, I just came back from a meeting with
a high profile oil company on how roots of trees/shrubs are
decaying/corroding the protective coating on oil and gas pipe
lines.</div>
<div>They are saying that because of the moisture content that
surrounds the pipes, roots are attracted to this and are now
"wrapping" themselves around the lines. They are claiming that
this(roots causing damage) is causing the protective coating to
decay or corrode, which they say, increases the risk for pipe
failure.</div>
<div> </div>
<div>The pipeline is situated on a city easement that allows for
the current underground oil & gas infrastructure and for
future additions, essentially it's a oil and gas easement. </div>
<div>Trees and shrubs have been planted (1989) on this city
easement to provide a visual barrier to the industrial and
commercial areas of Regina. The company has signed an agreement
to this, back in the early 90's. </div>
<div>They are requesting that the plant material be removed
because there is a concern that if the roots continue to corrode
or decay the coating, this may cause leaks, explosions and loss
of life.</div>
<div> </div>
<div>This will have a significant impact to other areas of the
municipality as there is natural gas, oil and other underground
petroleum utilities. This decision could be precedence setting,
even for homeowners.</div>
<div>I'll have our legal staff take a look into this and get their
input as well.</div>
<div> </div>
<div>There is no question that public safety is one of our first
priorities here in Regina and that if a tree is of a public
safety concern and we've determined this, we will remove it.</div>
<div> </div>
<div>My questions are;</div>
<div> </div>
<div>1. Has anyone dealt or heard of this concern before?</div>
<div> </div>
<div>2. They have verbally indicated this, but I feel they should
have data to support this. Is there any documentation out there
that supports their claim? </div>
<div> </div>
<div>3. If the data/research is there that supports their claim,
please pass this onto me.</div>
<div> </div>
<div>Much appreciated and look forward to your response,</div>
<div> </div>
<div> </div>
<div> </div>
<div>Ray Morgan</div>
<div>Manager, Forestry, Pest Control &</div>
<div> Horticulture Branch</div>
<div>
<div>Parks and Open Space Department</div>
</div>
<div>City Operations Division</div>
<div> </div>
<div>P: 306.777-7065</div>
<div>C: 306.531-5119</div>
<div>E: <a moz-do-not-send="true" href="mailto:rmorgan@regina.ca">rmorgan@regina.ca</a></div>
<div> Regina.ca</div>
<div> </div>
<div><img src="cid:part1.01020906.03070101@gmail.com"></div>
<div> </div>
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