[CANUFNET] Constructing Driveways within Critical Root Zones

Mon Jul 13 17:02:55 EDT 2020

Sometimes it helps to see how not to do it.

Note the latest in hoarding on the attached photo and an approximate 60 
cm Honey Locust.

---
Derek J. Coleman, PhD., R.P.P.. R.P.F (Ret)
Ages Consultants Limited
519-658-6085
519-780-8125

On 2020-07-13 10:07, Philip van Wassenaer via CANUFNET wrote:
> Silva cells would be hard to use for this purpose. They are better
> suited to creating soil volumes where there are none. In this case
> Astrid needs some form of no-dig or minimal excavation solution to go
> over the existing soil volume….while trying to keep the negative
> consequences that Michael R. pointed out to a minimum.
> 
> Cheers,
> 
> Philip van Wassenaer, B.SC., MFC
> 
> Urban Forest Innovations Inc.
> 
> 1331 Northaven Drive
> 
> Mississauga ON L5G 4E8
> 
> Tel:  (905) 274-1022
> 
> Cell: (647) 221-3046
> 
> Fax: (905) 274-2170
> 
> www.urbanforestinnovations.com [2]
> 
> From: CANUFNET <canufnet-bounces at list.web.net> On Behalf Of Sadia Butt
> via CANUFNET
> Sent: July 11, 2020 1:01 PM
> To: Canadian Urban Forest Network <canufnet at list.web.net>
> Cc: Sadia Butt <sadiabutt.ca at gmail.com>
> Subject: Re: [CANUFNET] Constructing Driveways within Critical Root
> Zones
> 
> Hi Astrid, I recall several years ago that 'silva cells'  was
> something I thought was a great idea for both new construction and for
> retrofitting areas near trees worth preserving/conserving. There are
> some new designs these days. But for an additional idea and if the
> client is willing to send here are some links. The company who
> brokers the cells is Deeproots. In my mind it is one of the most
> amazing inventions.
> 
> Best regards,
> 
> Sadia
> 
> http://www.deeproot.com/products/silva-cell/silva-cell-overview.html
> 
> http://www.deeproot.com/silvapdfs/resources/articles/Comparing_Silva_Cells_and_Structural_Soil.pdf
> 
> http://lg.baumpub.com/news/54/roots-running-deep
> 
> On Fri, Jul 10, 2020 at 3:21 PM Astrid Nielsen via CANUFNET
> <canufnet at list.web.net> wrote:
> 
>> Thank you everyone for your good suggestions...this has been very
>> helpful and I'm grateful that we have a mechanism through which we
>> can share this valuable info.
>> 
>> Have a great weekend!
>> 
>> Astrid
>> 
>> __________________________________________
>> Astrid Nielsen, MFC
>> 
>> Ontario Registered Professional Forester
>> 
>> ISA Certified Arborist®
>> 
>> ISA Tree Risk Assessment Qualified
>> 
>> astrid.nielsen at dendronforestry.ca
>> 
>> +1.613.805.WOOD (9663)
>> 
>> www.dendronforestry [5]
>> 
>> On Fri, Jul 10, 2020 at 1:33 PM Philip van Wassenaer via CANUFNET
>> <canufnet at list.web.net> wrote:
>> 
>>> We have done a variety of these with various methods but our
>>> colleagues have provided you some really good guidance already. I
>>> think if you look at the pdf Geri just sent you, you have a gold
>>> star solution. You can source the materials for the layers from a
>>> whole variety of suppliers but the approach is cutting edge…IMHO
>>> 😊.
>>> 
>>> Cheers,
>>> 
>>> Philip
>>> 
>>> Philip van Wassenaer, B.SC [1]., MFC
>>> 
>>> Urban Forest Innovations Inc.
>>> 
>>> 1331 Northaven Drive
>>> 
>>> Mississauga ON L5G 4E8
>>> 
>>> Tel:  (905) 274-1022
>>> 
>>> Cell: (647) 221-3046
>>> 
>>> Fax: (905) 274-2170
>>> 
>>> www.urbanforestinnovations.com [2]
>>> 
>>> From: CANUFNET <canufnet-bounces at list.web.net> On Behalf Of Geri
>>> Poisson via CANUFNET
>>> Sent: July 10, 2020 12:01 PM
>>> To: Canadian Urban Forest Network <canufnet at list.web.net>
>>> Cc: Geri Poisson <gpoisson at beaconenviro.com>
>>> Subject: Re: [CANUFNET] Constructing Driveways within Critical
>>> Root Zones
>>> 
>>> We had a project where the client wanted to raise the grade over
>>> the root zone of a 100+ cm DBH White Oak. The city accepted a plan
>>> to use a plastic grid filled with gravel (see attached) laid over
>>> the existing grade to avoid compaction and allow infiltrations.
>>> I’m not sure that it has been constructed yet, so I can’t
>>> speak to how successful the method will be in protecting the
>>> tree’s health and survival, but the city accepted it.
>>> 
>>> _Geri Poisson, B.A. (Hons.), Dipl. Eco. Restoration / Terrestrial
>>> Ecologist, ISA Certified Arborist_
>>> 
>>> Beacon Environmental
>>> 
>>> 6 Cumberland St., Barrie, ON L4N 2P4
>>> 
>>> T) 705.999.4935 x249  C) 705.828.1196
>>> 
>>> www.beaconenviro.com [3]
>>> 
>>> To protect our staff, families, clients and the greater community
>>> all Beacon staff are working remotely. We will continue to provide
>>> timely communications _via_ email and telephone and are committed
>>> to providing the highest level of service possible during this
>>> challenging time.
>>> 
>>> From: CANUFNET <canufnet-bounces at list.web.net> On Behalf Of Astrid
>>> Nielsen via CANUFNET
>>> Sent: July 10, 2020 11:15 AM
>>> To: Canadian Urban Forest Network <canufnet at list.web.net>
>>> Cc: Astrid Nielsen <astrid.nielsen at dendronforestry.ca>
>>> Subject: [CANUFNET] Constructing Driveways within Critical Root
>>> Zones
>>> 
>>> Hello Canufnet members,
>>> 
>>> I have a client that is building two homes on an infill lot where
>>> there is a very large (106 cm), healthy silver maple. He is very
>>> willing to explore different options for working around the tree
>>> that would cause minimum disruption to the roots.
>>> 
>>> Does anyone have examples of building driveways within the
>>> critical root zones of large trees that have managed to prevent
>>> significant root damage and tree decline? Specifically, he is
>>> considering a type of elevated driveway that would not require the
>>> severing of roots or significant soil compaction, and dissipate
>>> the pressure through posts. Although the posts would cause some
>>> root damage, it would be significantly less than excavation for a
>>> standard driveway. If anyone has examples of this type of
>>> engineering, I would be grateful if you could share it with me.
>>> 
>>> Thank you,
>>> 
>>> Astrid
>>> 
>>> ______________________________________
>>> 
>>> Astrid Nielsen, MFC
>>> 
>>> Ontario Registered Professional Forester
>>> 
>>> ISA Certified Arborist®
>>> 
>>> ISA Tree Risk Assessment Qualified
>>> 
>>> astrid.nielsen at dendronforestry.ca
>>> 
>>> +1.613.805.WOOD (9663)
>>> 
>>> www.dendronforestry [4]
> 
> 
> Links:
> ------
> [1] http://B.SC
> [2] http://www.urbanforestinnovations.com/
> [3] 
> https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.beaconenviro.com&data=02%7C01%7Cgpoisson%40beaconenviro.com%7Cee60e28cb2064cd8224108d7798fcf4f%7C7ad3048f5c1d4bc1b2a671cdb2d9e8f1%7C0%7C0%7C637111530868126573&sdata=00ounYtxds2VsraFAcE6Q%2BdsQtjoXOcd0oTUS0ol1LI%3D&reserved=0
> [4] 
> https://can01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.dendronforestry.ca%2F&data=02%7C01%7Cgpoisson%40beaconenviro.com%7C16b372ce5e9f451f789308d824e59096%7C7ad3048f5c1d4bc1b2a671cdb2d9e8f1%7C0%7C0%7C637299915675762450&sdata=xsWmVHkOi7KAUCiZIMwKgEOZpqTRxKp7isUvikFRFYM%3D&reserved=0
> [5] http://www.dendronforestry.ca
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