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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Ian,<o:p></o:p></span></p>
<p class="MsoNormal">We see a lot of different standards among communities with and without boulevard planting strips and the outcomes really vary. In new subdivision construction, the removal of topsoil affects long-term tree growth potential on both the private
and public realm side. The road construction standards are focused on compacting soil to remove air voids and making it more difficult for water to flow through and the drainage standards are focused on taking the water away from the site quickly and efficiently.
Unfortunately, our objectives for creating site conditions to grow trees are often at odds with the engineers’ standards.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To add to the debate, I don’t think there’s a universally observable performance outcome for each approach – other than garbage soil in, garbage tree out. Either approach can succeed or fail so soil standards and enforcement are critical.
The monolithic sidewalk may be simpler to implement at the construction stage but there are trade-offs. I think in the end it’s a matter of the character you’re going for.
<o:p></o:p></p>
<p class="MsoNormal"><img width="624" height="677" style="width:6.5in;height:7.052in" id="Picture_x0020_9" src="cid:image003.png@01D7B901.D7FCE520"><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Winnipeg blvd strip and monolithic in new developments<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><img width="408" height="307" style="width:4.25in;height:3.1979in" id="Picture_x0020_16" src="cid:image011.jpg@01D7B900.FF8761C0" alt="A road with trees on the side
Description automatically generated with low confidence"><img width="411" height="306" style="width:4.2812in;height:3.1875in" id="Picture_x0020_15" src="cid:image012.png@01D7B900.FF8761C0" alt="A picture containing text, sky, outdoor, road
Description automatically generated"></span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Calgary boulevard strip and monolithic<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><img width="444" height="291" style="width:4.625in;height:3.0312in" id="Picture_x0020_14" src="cid:image013.jpg@01D7B900.FF8761C0" alt="A street with cars on it
Description automatically generated with low confidence"><img width="388" height="289" style="width:4.0416in;height:3.0104in" id="Picture_x0020_13" src="cid:image014.jpg@01D7B900.FF8761C0" alt="A road with cars on it and trees on the side
Description automatically generated with medium confidence"></span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Trevor Thistle’s observation of older neighbourhoods ring true for me. The soil wasn’t removed in older parts of cities and even with a lot of compaction over time and loss of pervious cover, trees can thrive if the underlying soil structure
is suitable (see the image spread below of plane trees from 1888 to 1945 to 2013). If your trees are growing well, do everything you can to prevent full road renewal!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="264" height="225" style="width:2.75in;height:2.3437in" id="Picture_x0020_12" src="cid:image001.jpg@01D7B6AD.4ECA30B0" alt="IGA_11_1_2013_17_3_20_419"><img width="297" height="216" style="width:3.0937in;height:2.25in" id="Picture_x0020_11" src="cid:image015.jpg@01D7B900.FF8761C0" alt="A picture containing text, tree, outdoor, road
Description automatically generated"><img width="289" height="216" style="width:3.0104in;height:2.25in" id="Picture_x0020_10" src="cid:image016.jpg@01D7B900.FF8761C0" alt="A street with trees and buildings
Description automatically generated with low confidence"><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:16.2pt;line-height:16.0pt;background:white">
<b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#444444">Amelia Needoba | Principal | PMP, ISA Cert. Arb (she/her)<br>
</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">3559 Commercial Street</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#222222"> | Vancouver | V5N 4E8</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#999999"><br>
</span><span style="color:black"><a href="http://www.diamondheadconsulting.com/" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#538135">Diamond Head Consulting</span></a></span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#999999"> P </span><span style="color:black"><a href="tel:604.733.4886" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#538135">604.733.4886</span></a></span><u><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#538135"> ext.
233</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#999999"> F </span><span style="color:black"><a href="tel:604.733.4879" target="_blank"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#538135">604.733.4879</span></a></span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> CANUFNET <</span><a href="mailto:canufnet-bounces@list.web.net"><span lang="EN-US">canufnet-bounces@list.web.net</span></a><span lang="EN-US">>
<b>On Behalf Of </b>Ian Wilson via CANUFNET<br>
<b>Sent:</b> September 28, 2021 12:59 PM<br>
<b>To:</b> 'canufnet@list.web.net' <</span><a href="mailto:canufnet@list.web.net"><span lang="EN-US">canufnet@list.web.net</span></a><span lang="EN-US">><br>
<b>Cc:</b> Ian Wilson <</span><a href="mailto:IWilson@kelowna.ca"><span lang="EN-US">IWilson@kelowna.ca</span></a><span lang="EN-US">><br>
<b>Subject:</b> [CANUFNET] Trees and boulevards<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:solid #9C6500 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class="MsoNormal" style="line-height:12.0pt;background:#FFEB9C"><span lang="EN-US" style="font-size:10.0pt;color:#9C6500">CAUTION:</span><span lang="EN-US" style="font-size:10.0pt;color:black"> This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and know the content is safe.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">All, we are having a bit of an internal debate about standards for local/residential roads and boulevards. My observation is that trees that are planted in a boulevard behind a monolithic sidewalk (sidewalk up against
the curb and planting area next to the property) generally do better. They have access to more soil volume in the front yard, they get more water and the boulevard is tidier since the homeowner treats it like part of their yard. Also fewer issues with roots
lifting sidewalks. Some of our staff prefer the separated treed boulevard, for various reasons. Note, I’m not talking about busier roads where the trees in boulevards help to form a barrier from traffic.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We don’t have a lot of good examples here that directly show a comparison. Does anybody have some photos that might show the performance of trees on one side of the road in a separated boulevard, vs. trees on the other
side behind the sidewalk?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Below is an example that doesn’t exactly show this, but it does show the value of soil volume, with the trees on the left side being able to access the lawn area behind the sidewalk, vs. the trees in “coffins” on the
right. These are lindens planted at the same time.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><img border="0" width="989" height="688" style="width:10.302in;height:7.1666in" id="Picture_x0020_2" src="cid:image005.jpg@01D7B6AD.4ECA30B0"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span lang="EN-US" style="font-family:"Corbel",sans-serif;color:#0073CF">Ian Wilson</span></b><span lang="EN" style="font-family:"Corbel",sans-serif;color:#262626"><br>
</span><span lang="EN" style="font-family:"Corbel",sans-serif">Infrastructure Operations Manager | City of Kelowna<br>
250-469-8842 | </span><a href="mailto:iwilson@kelowna.ca"><span lang="EN" style="font-family:"Corbel",sans-serif">iwilson@kelowna.ca</span></a><span lang="EN-US" style="font-family:"Corbel",sans-serif"><br>
</span><span lang="EN" style="font-family:"Corbel",sans-serif">Submit a request for service on the go |
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<p class="MsoNormal" style="margin-bottom:12.0pt"><i><span lang="EN-US" style="font-family:"Corbel",sans-serif;color:black;background:white">I acknowledge that my workplace is located on the traditional, ancestral, unceded territory of the syilx/Okanagan people</span></i><i><span style="font-family:"Corbel",sans-serif">.</span></i><span lang="EN" style="font-family:"Corbel",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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