UKTC Archive

Re: Tree hazard potential assessment study Trunk break INJURY Child 2019 11 06

Subject: Re: Tree hazard potential assessment study Trunk break INJURY Child 2019 11 06
From: Michael Richardson
Date: Nov 07 2019 15:33:14
Yes Rupert, that is why "perfect" was in quotes, perfect is not always
perfect.
Perfect means large, full crowns subject to loading.
Here in Ontario, Canada we see late season wind-throw of trees when some
species are still in full leaf; the ornamental pears while beautiful red in
November are a good target for winds.  We also see heavy wet snow in early
November (such as is happening today), this sticks to the leaves of Norway
Maples and causes failures.

In the spring saturated soils and wind result in beautiful, full spruce
(primarily Colorado Blue and Green, Serbian, and Norway) failing at the
root system (maybe soil failure, not roots).  Trees that appear perfect,
and nobody would ever not as defective in any way, are the ones to fail.

Of the variation of trees.

Michael

Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

  <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Thu, Nov 7, 2019 at 10:17 AM Rupert Baker <rupert_baker@xxxxxxxx.co.uk>
wrote:

Hi Michael,
Useful info;  but a comment:
in very high winds, 'perfect' trees may be as ready or more so to fail
than 'defective' ones. This is because they have large healthy crowns full
of large healthy leaves, have grown well and so have a big sail area; by
contrast trees in poor health may have smaller crowns, much less dense leaf
area in the canopy, and, if they are decaying, may have more flexible stems
as a consequence of the hollowing.
Ted Green, a well known Ancient/Veteran tree person in the UK, tells a
lovely story about a visit of French foresters to a wood in ?Kent?, SE
England anyway, after the 'hurricane of 1987 which devastated tree cover in
SE England.
'M'seiur Green', asked one of the guests, 'was ze forestier here a
religious man?' 'No', said Ted, 'at least, not by the way he swears; why?'
'Well' said the Frenchman, 'all ze surviving trees, zey have white crosses
on zem' .



Most of the big healthy maidens in the wood had blown over, leaving  ones
that had been marked as unsafe................
All the best
Rupert Baker

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info On Behalf Of Michael Richardson
Sent: 07 November 2019 12:03
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Tree hazard potential assessment study Trunk break INJURY
Child 2019 XX XX

The tree appears to have some white rot in it, most likely due to
unspecialized colonization, not heart rot, beyond that we do not know much
about it.  The idea of epicormic shoots may be wrong as I believe the tree
is *Ulmus pumila* and as such adventitious buds and shoots are very common.

We do know that there was widespread tree damage across New York State and
Ontario that night (and maybe beyond?).  I have seen hundreds of damaged
trees on my routes over the last week.

Wind speeds have been reported as 50-80 kph and gusts as high as 120 along
Lake Ontario.  With these speeds we see breakage of defective trees and
some "perfect" trees.  Why perfect. well some species, Norway Maple and
Bradford Pears, still had leaves so wind loading was high, particularly
with the dense damp air.

How does one assess this type of failure in advanced? A competent person
performs a through ground-based VTA and recommends aerial or advanced
inspections as necessary.  That is not a great mystery but in general
advanced assessments are not commonplace, a level 1 or level 2 as defined
by TRAQ is the standard.

Michael


Michael Richardson B.Sc.F., BCMA
Ontario MTCU Qualified Arborist
Richardson Tree Care
Richardsontreecare.ca
613-475-2877
800-769-9183

  <http://www.richardsontreecare.ca/images/Tree_Doc_logo_email.png>



On Thu, Nov 7, 2019 at 3:02 AM Brewster, Ian <Ian.Brewster@xxxxxxx.co.uk>
wrote:

From a brief read there were a lot of trees failing causing
electricity supply disruption due it would appear to adverse weather
that night. With your example Were the neighbours concerned about a
visible tree defect or complaining because it was a nuisance to them?
I hope the girl makes a full recovery btw.

Sent from my Samsung Galaxy smartphone.
From a brief read there were a lot of trees failing causing
electricity supply disruption due it would appear to adverse weather
that night. With your example Were the neighbours concerned about a
visible tree defect or complaining because it was a nuisance to them?
I hope the girl makes a full recovery btw.

Sent from my Samsung Galaxy smartphone.


-------- Original message --------
From: Wayne Tyson <wt750mv@xxxxxx.com>
Date: 07/11/2019 03:33 (GMT+00:00)
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Tree hazard potential assessment study Trunk break INJURY
Child
2019 XX XX

Here it is. Of course there's insufficient information to come to a
conclusion, but the location of the break on the trunk in relation to
the apparent growth from dormant (epicormic) buds might have relevance
or be a coincidence. Apparent heart rot.

The question is, how does one best assess this kind of failure in
advance?


https://www.nbcnewyork.com/news/local/Tree-Falls-on-Young-Trick-Or-Tre
ater-in-NY-After-Halloween-Storms-Heavy-Winds-Leave-Damage-Across-Regi
on-564208701.html
<
https://www.nbcnewyork.com/news/local/Tree-Falls-on-Young-Trick-Or-Tre
ater-in-NY-After-Halloween-Storms-Heavy-Winds-Leave-Damage-Across-Regi
on-564208701.html


Thanks for your help!

Wayne



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NPS
 -------- Original message --------
From: Wayne Tyson <wt750mv@xxxxxx.com>
Date: 07/11/2019 03:33 (GMT+00:00)
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Tree hazard potential assessment study Trunk break INJURY
Child
2019 XX XX

Here it is. Of course there's insufficient information to come to a
conclusion, but the location of the break on the trunk in relation to
the apparent growth from dormant (epicormic) buds might have relevance
or be a coincidence. Apparent heart rot.

The question is, how does one best assess this kind of failure in
advance?


https://www.nbcnewyork.com/news/local/Tree-Falls-on-Young-Trick-Or-Tre
ater-in-NY-After-Halloween-Storms-Heavy-Winds-Leave-Damage-Across-Regi
on-564208701.html
<
https://www.nbcnewyork.com/news/local/Tree-Falls-on-Young-Trick-Or-Tre
ater-in-NY-After-Halloween-Storms-Heavy-Winds-Leave-Damage-Across-Regi
on-564208701.html


Thanks for your help!

Wayne



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The UKTC is supported by Bosky Trees arboricultural consultancy
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