[CANUFNET] Moisture along PIpelines CANUFNET Digest, Vol 82, Issue 11

[Iola Price]

Is it because the gravel beds in which pipes are laid serve as conduits for
water - thus creating a moist environment? Iola Price 

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Sent: November 24, 2011 3:01 PM
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Subject: CANUFNET Digest, Vol 82, Issue 11

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Today's Topics:

   1. Re: Fwd: Roots causing damage to Gas and Oil pipelines
      (Julian Dunster)


----------------------------------------------------------------------

Message: 1
Date: Thu, 24 Nov 2011 11:58:15 -0800
From: Julian Dunster <jadunster at gmail.com>
Subject: Re: [CANUFNET] Fwd: Roots causing damage to Gas and Oil
	pipelines
To: Canadian Urban Forest Network <canufnet at list.web.net>
Message-ID: <4ECEA1D7.2050306 at gmail.com>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

I thin the moisture results because of the temperature differential 
betwen inside and outside of the pipe, causing moisture to condense outside.

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.

www.dunster.ca


On 24/11/2011 9:55 AM, Ian Wilson wrote:
>
> I don't understand this -- why is there a higher moisture content 
> around the pipes?  Is it because the pipe intercepts some of the soil 
> moisture?  Julian if you know of any research please pass it along.
>
> I've had many people claim that tree roots break sewer lines because 
> they "know" there is water in the pipe but in my experience the roots 
> only capitalize on pipes that are already leaking or cracked (and 
> obviously they don't "know" what is in the pipe)
>
> Ian Wilson
>
> *Ian Wilson*, Park Services Manager
> *Park Services *
>
> TEL 250 469-8842
>
> FAX**250 862-3335
>
>
> *City of Kelowna* 1359 KLO road, Kelowna, BC  V1W 3N8 *kelowna.ca 
> <http://www.kelowna.ca>*
>
> /Have City news delivered direct to your inbox//. /e-*Subscribe* 
> <https://public.govdelivery.com/accounts/CNKELOWNA/subscriber/new>**
>
> **
>
> **
>
> *From:*canufnet-bounces at list.web.net 
> [mailto:canufnet-bounces at list.web.net] *On Behalf Of *Julian Dunster
> *Sent:* Thursday, November 24, 2011 9:32 AM
> *To:* Canadian Urban Forest Network
> *Subject:* Re: [CANUFNET] Fwd: Roots causing damage to Gas and Oil 
> pipelines
>
> 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.
>
> 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.
>   
> www.dunster.ca  <http://www.dunster.ca>
>
>
> On 23/11/2011 7:40 AM, Ray Morgan wrote:
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> 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.
>
> I'll have our legal staff take a look into this and get their input as 
> well.
>
> 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.
>
> My questions are;
>
> 1. Has anyone dealt or heard of this concern before?
>
> 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?
>
> 3. If the data/research is there that supports their claim, please 
> pass this onto me.
>
> Much appreciated and look forward to your response,
>
> Ray Morgan
>
> Manager, Forestry, Pest Control &
>
>  Horticulture Branch
>
> Parks and Open Space Department
>
> City Operations Division
>
> P: 306.777-7065
>
> C: 306.531-5119
>
> E: rmorgan at regina.ca <mailto:rmorgan at regina.ca>
>
>  Regina.ca
>
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End of CANUFNET Digest, Vol 82, Issue 11
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