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<BODY lang=EN-US vLink=purple link=blue>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Hi
All<?xml:namespace prefix = st1 ns =
"urn:schemas-microsoft-com:office:smarttags" /><st1:PersonName
w:st="on">,</st1:PersonName> </SPAN></P>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left> </P>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Here
in <st1:City w:st="on"><st1:place w:st="on">Edmonton</st1:place></st1:City> we
are doing Neighborhood renewal (street<st1:PersonName
w:st="on">,</st1:PersonName> sidewalk and curb reconstruction) on a massive
scale (8 neighborhoods a year and 12 starting next year). There are thousands of
mature trees affected by this construction every year and at this scale it is
impossible to do hand work around every tree. </SPAN></P>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left> </P>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">This
is what we do:</SPAN></P>
<P class=MsoNormal lang=en-us dir=ltr style="MARGIN: 0in 0in 0pt"
align=left> </P>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Sidewalk and curb
removal is done mechanically around all trees<st1:PersonName
w:st="on">,</st1:PersonName> paying close attention to minimizing root damage
and excavation depths as we pass the tree. Root damage is often unavoidable
but in the past <SPAN class=395372519-25052012>few </SPAN>years we have
come a long way and we seldom have to cut or shave a structural root for
sidewalk construction. Most of the root damage is peeled bark<st1:PersonName
w:st="on">,</st1:PersonName> which is still not ideal but is progress and a
good compromise between productivity and tree
conservation.</SPAN></LI></UL></DIV>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 3pt"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">We narrow streets
whenever possible to allow sidewalk<SPAN class=395372519-25052012>s</SPAN> and
curbs to be reconstructed further from the roots. This results in less root
damage and the addition of rooting area for the trees. </SPAN></LI></UL>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 3pt"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">We have abandoned the
idea that sidewalks have to be straight. Where property lines allow us and
drainage issues keep us from raising grades to get sidewalks over
roots<st1:PersonName w:st="on">,</st1:PersonName> we bend sidewalks around
roots. So<st1:PersonName w:st="on">,</st1:PersonName> we may have sections of
separate sidewalk that are serpentine. For the most part our citizens quite
like the finished product.</SPAN></LI></UL>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 3pt"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Where we cannot
change sidewalk alignments<st1:PersonName w:st="on">,</st1:PersonName> we
have developed what we call a "Tree Treatment". This is a process where we
minimize the excavation depth where the structural root plate of the
trees and the sidewalk overlap. Through a combination of grade raising and
adjusting the thickness of the base and concrete we manage to overcome most
root obstacles. Also the section of concrete that passes the tree (the length
varies depending on the tree size) is reinforced with extra rebar to resist
heaving. In addition<st1:PersonName w:st="on">,</st1:PersonName> the concrete
is scored every 12-16 inches<st1:PersonName w:st="on">,</st1:PersonName> the
theory is that these scores will allow the concrete to crack where we can hide
the cracks and allows the sidewalk to bend and not become disjointed as the
tree grows.</SPAN></LI></UL>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman"
size=3> </FONT></o:p></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Finally<st1:PersonName
w:st="on">,</st1:PersonName> an urban forester monitors the projects and makes
a list of trees that have sustained moderate to severe root damage. Very
rarely do we need to remove a tree that has been rendered hazardous due to
root damage. The trees that make this list are watered and fertilized for 3
years to aid them in recovery from construction damage. </SPAN></LI></UL>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"></SPAN> </DIV>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><SPAN
class=395372519-25052012>If you have any question fell free to contact
me.</SPAN></SPAN></DIV>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><SPAN
class=395372519-25052012></SPAN></SPAN> </DIV>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><SPAN
class=395372519-25052012><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><FONT face="Times New Roman">Trevor Thistle </FONT><FONT
face="Times New Roman" size=1>B.Sc. (Forestry)</FONT></SPAN> <BR><SPAN
lang=en-us><FONT face="Times New Roman">Urban Forester & ISA Certified
Arborist</FONT></SPAN> <BR><SPAN lang=en-us><FONT face="Times New Roman">The
City of Edmonton, </FONT></SPAN><BR><SPAN lang=en-us><FONT
face="Times New Roman">Neighbourhoods and Parks</FONT></SPAN> <BR><SPAN
lang=en-us><FONT face="Times New Roman">Forestry Services</FONT></SPAN>
<BR><SPAN lang=en-us><FONT face="Times New Roman">Ph: (780)
944-7833</FONT></SPAN> <BR><SPAN lang=en-us><FONT face="Times New Roman">Fax:
(780) 496-4978</FONT></SPAN> <BR><SPAN lang=en-us><FONT
face="Times New Roman">Cell: (780) 913-5893</FONT></SPAN>
</P></SPAN></SPAN></DIV>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> canufnet-bounces@list.web.net
[mailto:canufnet-bounces@list.web.net] <B>On Behalf Of </B>Ian
Wilson<BR><B>Sent:</B> Tuesday, May 22, 2012 8:12 AM<BR><B>To:</B> 'Canadian
Urban Forest Network'<BR><B>Subject:</B> Re: [CANUFNET] sidewalk bridging over
roots<BR></FONT><BR>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">Jeremy, that will likely be part
of the strategy. However conventional sidewalk construction would probably
damage a lot of roots in this case even if we raise the grade – and the sidewalk
is likely to crack in a few years. Thus we are looking at the bridging or
rubber sidewalks options<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">Thanks Ian<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
canufnet-bounces@list.web.net [mailto:canufnet-bounces@list.web.net] <B>On
Behalf Of </B>Jeremy Gye<BR><B>Sent:</B> Saturday, May 19, 2012 10:21
AM<BR><B>To:</B> 'Canadian Urban Forest Network'<BR><B>Subject:</B> Re:
[CANUFNET] sidewalk bridging over roots<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN lang=EN-CA style="COLOR: #1f497d">Hi
Ian,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-CA style="COLOR: #1f497d">Is there any latitude
to play with the grading/profile of the sidewalk, in order to accommodate the
roots using a more conventional sidewalk construction
approach?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-CA
style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN lang=EN-CA
style="COLOR: black">Jeremy<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-CA
style="COLOR: black"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-CA style="COLOR: #00b050">E-mail:
jgye@shaw.ca<o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><SPAN lang=EN-CA
style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none">
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
canufnet-bounces@list.web.net [mailto:canufnet-bounces@list.web.net] <B>On
Behalf Of </B>Ian Wilson<BR><B>Sent:</B> May-18-12 2:57 PM<BR><B>To:</B>
'Canadian Urban Forest Network'<BR><B>Subject:</B> [CANUFNET] sidewalk bridging
over roots<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><SPAN lang=EN-CA><o:p> </o:p></SPAN></P>
<P class=MsoNormal>ALL-<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Kelowna is looking at a new sidewalk installation next to
some mature street trees (red oaks). In the past we have successfully used
rubber sidewalks in these types of situations but in this case it’s going to be
a multi-use corridor and there are concerns that the rubber surface is not as
suitable for roller blades, etc. because of the seams.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I have a couple of questions:<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoListParagraph
style="TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo2"><![if !supportLists]><SPAN
style="mso-list: Ignore">1)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]> Anybody else have experience with rubber sidewalks
in these situations and whether the bumps are an issue?<o:p></o:p></P>
<P class=MsoListParagraph
style="TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo2"><![if !supportLists]><SPAN
style="mso-list: Ignore">2)<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]>Another possible solution is reinforced concrete
bridging over the roots. Does anybody have specifications for bridged
sidewalk construction that they could send to me?<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Ian<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; COLOR: #b71234; FONT-FAMILY: 'Trebuchet MS','sans-serif'">Ian
Wilson</SPAN></B><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Trebuchet MS','sans-serif'">,
Park Services Manager<BR><B>Park Services <o:p></o:p></B></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Trebuchet MS','sans-serif'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Trebuchet MS','sans-serif'">TEL
250 469-8842<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Trebuchet MS','sans-serif'">FAX<B>
</B>250 862-3335<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Trebuchet MS','sans-serif'"><BR><B>City
of Kelowna</B> 1359 KLO road, Kelowna, BC V1W 3N8
</SPAN><B><SPAN
style="FONT-SIZE: 10pt; COLOR: #b71234; FONT-FAMILY: 'Trebuchet MS','sans-serif'"><A
href="http://www.kelowna.ca/"><SPAN
style="COLOR: #b71234">kelowna.ca</SPAN></A><o:p></o:p></SPAN></B></P>
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