UKTC Archive

Re: Tree survey - how many dodgy trees from initial survey work

Subject: Re: Tree survey - how many dodgy trees from initial survey work
From: Jerry Ross
Date: Dec 31 2003 11:17:00
Hi John

A colleague of mine, Brendan Tuer, formerly worked with a local authority
and gained an M.Sc. in arb. while doing so. For his thesis he did a risk
analysis of LEA (i.e. school) sites in the county which involved analysing
out all of the different priorities of tree hazard/risk. He found that out
of a tree stock of 9077 trees, 6.6% were recorded as having a High, Moderate
or Immediate priority for attention. 1.45% had a risk of failure quantified
as "likely to result in significant consequences".   0.044% had a "high risk
of failure likely to result in extensive damage to buildings and targets, or
loss of life".
And much more besides. May be worth while having a word with him.
brendantuer@xxxxxxxx.co.uk

And a happy, prosperous and hazard-free New Year to one & all!

Jerry R

----- Original Message -----
From: "John Flannigan" <John.Flannigan@xxxxxxxxxxx.gov.uk>
To: "UK Tree Care" <uktc@xxxxxx.tree-care.info>
Sent: Tuesday, December 30, 2003 4:06 PM
Subject: Tree survey - how many dodgy trees from initial survey work


I'm still ploughing through this risk assessment business and I would
appreciate any info on the following.

I am, hopefully, about to embark on a thorough survey of the trees under
my
responsibility. I am trying to judge (in a scientifically wild a** way)
how
many trees will be found that will need urgent work from this initial
survey. I was therefore wondering if those that had undertaken similar
surveys had worked it out in any way.

For example, in an ideal world we might find some amazing scientific fact
that 8% of all trees from such surveys were considered to be in need of
urgent attention. This would make budgeting a whole lot easier. It's just
as
likely that a range of haphazard findings exist but who knows?

I apologise for the dullness of these postings at this festive time but
I've
always found this generally quiet time of year useful for catching up on a
range of paperwork.
John


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The UKTC is supported by The Arbor Centre
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