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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>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.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cheers,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span lang=EN-US>Philip van Wassenaer, B.SC., MFC<o:p></o:p></span></b></p><p class=MsoNormal>Urban Forest Innovations Inc.<o:p></o:p></p><p class=MsoNormal>1331 Northaven Drive<o:p></o:p></p><p class=MsoNormal>Mississauga ON L5G 4E8<o:p></o:p></p><p class=MsoNormal><span lang=EN-US>Tel: (905) 274-1022<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Cell: (647) 221-3046<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Fax: (905) 274-2170<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><img width=153 height=73 style='width:1.5937in;height:.7604in' id="Picture_x0020_2" src="cid:image001.jpg@01D658FD.5A8E1740" alt="UFI new logo very small"><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><a href="http://www.urbanforestinnovations.com/">www.urbanforestinnovations.com</a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> CANUFNET <canufnet-bounces@list.web.net> <b>On Behalf Of </b>Sadia Butt via CANUFNET<br><b>Sent:</b> July 11, 2020 1:01 PM<br><b>To:</b> Canadian Urban Forest Network <canufnet@list.web.net><br><b>Cc:</b> Sadia Butt <sadiabutt.ca@gmail.com><br><b>Subject:</b> Re: [CANUFNET] Constructing Driveways within Critical Root Zones<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>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. <span style='font-family:"Arial",sans-serif;color:black'>The company who brokers the cells is </span>Deeproots<span style='font-family:"Arial",sans-serif;color:black'>. In my mind it is one of the most amazing inventions. </span><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'>Best regards,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'>Sadia<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'><a href="http://www.deeproot.com/products/silva-cell/silva-cell-overview.html" target="_blank">http://www.deeproot.com/products/silva-cell/silva-cell-overview.html</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'><a href="http://www.deeproot.com/silvapdfs/resources/articles/Comparing_Silva_Cells_and_Structural_Soil.pdf" target="_blank">http://www.deeproot.com/silvapdfs/resources/articles/Comparing_Silva_Cells_and_Structural_Soil.pdf</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Arial",sans-serif;color:black'><a href="http://lg.baumpub.com/news/54/roots-running-deep" target="_blank">http://lg.baumpub.com/news/54/roots-running-deep</a><o:p></o:p></span></p></div></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, Jul 10, 2020 at 3:21 PM Astrid Nielsen via CANUFNET <<a href="mailto:canufnet@list.web.net">canufnet@list.web.net</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><p class=MsoNormal>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.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Have a great weekend!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Astrid<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>__________________________________________<br><b>Astrid Nielsen, </b></span><span style='font-family:"Verdana",sans-serif'>MFC</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>Ontario Registered Professional Forester</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>ISA Certified</span><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> Arborist®</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>ISA Tree Risk Assessment Qualified</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="mailto:astrid.nielsen@dendronforestry.ca" target="_blank"><span style='font-size:9.5pt;font-family:"Verdana",sans-serif'>astrid.nielsen@dendronforestry.ca</span></a><o:p></o:p></p></div><div><div><div><p class=MsoNormal><span style='font-family:"Verdana",sans-serif'>+1.613.805.WOOD (9663)</span><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-family:"Verdana",sans-serif'><a href="http://www.dendronforestry.ca" target="_blank">www.dendronforestry</a></span> <o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Fri, Jul 10, 2020 at 1:33 PM Philip van Wassenaer via CANUFNET <<a href="mailto:canufnet@list.web.net" target="_blank">canufnet@list.web.net</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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 <span style='font-family:"Segoe UI Emoji",sans-serif'>😊</span>.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Cheers,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Philip<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US>Philip van Wassenaer, <a href="http://B.SC" target="_blank">B.SC</a>., MFC</span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Urban Forest Innovations Inc.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>1331 Northaven Drive<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Mississauga ON L5G 4E8<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Tel: (905) 274-1022</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Cell: (647) 221-3046</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Fax: (905) 274-2170</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'><img border=0 width=153 height=73 style='width:1.5937in;height:.7604in' id="gmail-m_-4272256853682799285gmail-m_-2786119594206759258Picture_x0020_1" src="cid:image001.jpg@01D658FD.5A8E1740" alt="UFI new logo very small"></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'><a href="http://www.urbanforestinnovations.com/" target="_blank">www.urbanforestinnovations.com</a></span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US>From:</span></b><span lang=EN-US> CANUFNET <<a href="mailto:canufnet-bounces@list.web.net" target="_blank">canufnet-bounces@list.web.net</a>> <b>On Behalf Of </b>Geri Poisson via CANUFNET<br><b>Sent:</b> July 10, 2020 12:01 PM<br><b>To:</b> Canadian Urban Forest Network <<a href="mailto:canufnet@list.web.net" target="_blank">canufnet@list.web.net</a>><br><b>Cc:</b> Geri Poisson <<a href="mailto:gpoisson@beaconenviro.com" target="_blank">gpoisson@beaconenviro.com</a>><br><b>Subject:</b> Re: [CANUFNET] Constructing Driveways within Critical Root Zones</span><o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><i><span style='font-size:10.0pt;color:#0163A5'>Geri Poisson, B.A. (Hons.), Dipl. Eco. Restoration / Terrestrial Ecologist, ISA Certified Arborist</span></i></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;color:#0163A5;text-transform:uppercase'>Beacon Environmental</span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:9.0pt;color:#0163A5'>6 Cumberland St., Barrie, ON L4N 2P4</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:9.0pt;color:#0163A5'>T) 705.999.4935 x249 C) 705.828.1196</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a href="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" target="_blank"><span style='font-size:9.0pt;color:#0163A5'>www.beaconenviro.com</span></a><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US>To protect our staff, families, clients and the greater community all Beacon staff are working remotely. We will continue to provide timely communications <i>via</i> email and telephone and are committed to providing the highest level of service possible during this challenging time. </span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US>From:</span></b><span lang=EN-US> CANUFNET <<a href="mailto:canufnet-bounces@list.web.net" target="_blank">canufnet-bounces@list.web.net</a>> <b>On Behalf Of </b>Astrid Nielsen via CANUFNET<br><b>Sent:</b> July 10, 2020 11:15 AM<br><b>To:</b> Canadian Urban Forest Network <<a href="mailto:canufnet@list.web.net" target="_blank">canufnet@list.web.net</a>><br><b>Cc:</b> Astrid Nielsen <<a href="mailto:astrid.nielsen@dendronforestry.ca" target="_blank">astrid.nielsen@dendronforestry.ca</a>><br><b>Subject:</b> [CANUFNET] Constructing Driveways within Critical Root Zones</span><o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello Canufnet members,<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thank you,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Astrid<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Verdana",sans-serif'>______________________________________</span><o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>Astrid Nielsen, </span></b><span style='font-family:"Verdana",sans-serif'>MFC</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>Ontario Registered Professional Forester</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Verdana",sans-serif'>ISA Certified</span><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'> Arborist®</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Verdana",sans-serif'>ISA Tree Risk Assessment Qualified</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a href="mailto:astrid.nielsen@dendronforestry.ca" target="_blank"><span style='font-size:9.5pt;font-family:"Verdana",sans-serif'>astrid.nielsen@dendronforestry.ca</span></a><o:p></o:p></p></div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Verdana",sans-serif'>+1.613.805.WOOD (9663)</span><o:p></o:p></p></div></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Verdana",sans-serif'><a href="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" target="_blank">www.dendronforestry</a></span> <o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></blockquote></div></blockquote></div></div></body></html>