[CANUFNET] Ash Species Rating

[Meagan Hanna]

Good evening Alison,


For the past five years I've had ash at 20% in my books. I work primarily in a municipal setting and I benefit from applying by-laws that establish a minimum value for city trees where I am. I have worked for municipalities that set a minimum value between 1000$ and 1300$ per tree. Usually, ash falls at the minimum which essentially makes up your planting cost for an average sized B&B tree.


Now that ash are dying in my neck of the woods, you bring up a good point. I have a hard time rating existing trees providing landscape functions at zero % if they still appear viable. For instance, the loss of a treated tree in an early infestation context that is responding well to treatment - the value the owner has put into retaining the tree, is it worth something? What will that look like in a few years from now? I'm curious to see the situation unfold. Not sure that aspect is covered in tree appraisal literature - certainly not in French Canadian literature that's for sure.


I'm looking forward to reading more points of view about this.


Best of luck and warm regards from Montreal!

Meg


Meagan Hanna, MA.
meagan.hanna at mail.mcgill.ca
________________________________
From: CANUFNET <canufnet-bounces at list.web.net> on behalf of JackRadecki <jackandali at sympatico.ca>
Sent: September 20, 2016 11:16:07 AM
To: 'Canadian Urban Forest Network'
Subject: Re: [CANUFNET] Ash Species Rating

Hello Alison

I am the chair of the ISAO Regional Plant Appraisal Committee.
This question has been brought forward to our attention.
The species rating you see comes from the Ontario Supplement to the 8th edition which is now redundant but we continue to use the ratings until we get guidance from the new  10 edition of the Guide for Plant Appraisal.
If the Ash trees are in an infested area such as Simcoe County we recommend a 0 % rating unfortunately giving Ash trees no value.

regards Jack Radecki  RCA,  ISAO RPAC chair

From: CANUFNET [mailto:canufnet-bounces at list.web.net] On Behalf Of Alison Bond
Sent: September 20, 2016 8:29 AM
To: canufnet at list.web.net
Subject: [CANUFNET] Ash Species Rating

Hello.

I would be interested in hearing from others who have dealt with appraisal of ash in context of EAB.

A contractor has encroached on EP lands and removed vegetation, some of which includes ash.  Compensation will be determined using the Trunk Formula Method.  The municipality is in Simcoe County (Ontario) and EAB has been detected in several locations in the county.   ISA Ontario has listed the species rating for Ash as 69-75%.  Given EAB, there may be justification in lowering the species rating, but I am wondering what others have been comfortable with.

Thank you.

Alison


Alison Bond BSc MSc BLA   OALA  CSLA
Landscape Architect and Certified Arborist

ENVISION-TATHAM Inc.
115 Sandford Fleming Drive, Suite 200, Collingwood, L9Y 5A6
abond at envision-tatham.com<mailto:abond at envision-tatham.com> I  Tel: 705.445.0422  I  Fax: 705.444.2327  I  Cell: 705.994.2059 I   www.envision-tatham.com<http://www.envision-tatham.com>

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