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<Gerry Kuta>
posted
I have been trying to get the $6,400.00 answer (page 12)for the senario given (page 7)in the Guide for Plant Appraisal 9th edition using the metodology on page 11. I must be missing something and am asking if the details of the example calculations are posted anywhere?


Thanks
http://www.city.winnipeg.mb.ca/PWDForestry
 
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<Scott Cullen>
posted
Reply to post by Gerry Kuta, on November 07, 2000 at 10:32:28:

These must be workbook page numbers? They don't match the 9th Edition itself. I don't have the workbook.
 
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<Gerry Kuta>
posted
Reply to post by Scott Cullen, on November 07, 2000 at 10:32:28:

Yes it is the WORKBOOK of the GPA 9th. ed. i refer to!

When I follow the senario in the Trunk formula Method Work Sheet I get a much different answer than is given.

My quetion is; is the example was worked out anywhere in detail so I can see where I went astray.

We need to be able to justify this method legally to our Claims and Insurance Branch.

Any ideas?
 
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<Lew Bloch>
posted
Reply to post by Gerry Kuta, on November 08, 2000 at 17:15:13:

I went through the excercise and came up with $6400.00.

The condition rating is 88%
trunk diameter is 16"
location is 85%
species rating is 80%
replacement tree is 4" (13 square inches)
replacement tree cost is $600.00
installation cost is 1400.00
installed cost is $2000.00
unit tree cost is $46.00 per square inch
appraised trunk area is 201 square inches

201 minus 13=188
188 times $46=$8648
add to the installed cost of $2000=$10,648
$10,648 x 80%(species) x 88%(condition) x 85%(location) =$6372.00
Round off to $6400.00

Any questions?

lew
 
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<Scott>
posted
Reply to post by lew bloch, on November 09, 2000 at 13:35:58:

I think it's necessary to recognize that while you must have accurate math and be able to explain it as well as be able to defend your professional judgments as data inputs to the formula, that is not the methodological picture and not necessarily the legal picture.

Any methodology may or may not be supported by statute, regulation or case law in a particular jurisdiction. Some US states allow replacement cost approaches as measures of damages, others don't. Connecticut has just passed legislation recognizing replacment cost for publically owned trees but the case law for privately owned trees does not entirely support replacment cost for them... so application may vary even within a jurisdiction.

Did I see in your origninal post that you are in Canada? Maybe Julian has some insight. Are you out there???
 
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<Scott>
posted
Reply to post by Scott , on November 09, 2000 at 18:02:13:

That was supposed to be "...that IS the methodological picture and not necessarily the legal picture."
 
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<Gerry Kuta>
posted
Reply to post by Scott, on November 10, 2000 at 08:11:39:

Hi,
Yes, I'm in Canada and Jullian refered me to this site. It's great to see this type of discussion group!

I'm getting $6,700 through the 'metric line' of calculation. I'm not a mathematician but I think there should not be a $300.00 difference between the two methods.

I do not appraise trees for a living, rather am a Technician with a municipal govt. and need to fill these type of forms in for our public automobile insurance company when a tree is destroyed. They sometimes call us to task on calculations so I need to be sure of the method and steps. As for expertise, we do call the shots relative to factors and percentages. The new edition will undoubtly cause a renewed interest in reducing our valuations.
 
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<Gerry Kuta>
posted
Reply to post by lew bloch, on November 09, 2000 at 13:35:58:

Thanks lew

This pointed out some problems I was having, one being there appears to be a diffence in final value between metric and imperial.

Have you encountered this? Have you dealt with any similar situations.

Thanks again!
 
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<Lew Bloch>
posted
Reply to post by Gerry Kuta, on November 09, 2000 at 18:02:13:

Never having used metric or imperial, I have not run into any such problems. I'm glad I was helpful.
lew
 
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<Russ Carlson>
posted
Reply to post by Gerry Kuta, on November 09, 2000 at 18:02:13:

When I run the numbers I get the same answer both ways. I'll substitute the metrics.

16" = 40.64 cm
$46/Sq in = $7.13/Sq cm
4" diameter = 12.566371 sq inches = 81.073197 Sq. cm.

40.64 cm diameter = 1297.171146 sq cm
1297.171146 - 81.073197 = 1216.09795 sq cm
1216.09795 sq cm x $7.13/sq cm = $ 8670.778382
add installed cost +$2000 = 10670.77
times spp, condition and location;
x .8 x .88 x .85 = $ 6385.39

Round off to $6400.00

When I worked through the numbers in English (Imperial) to the same precision, the final number was 6385.40. This is just rounding error in the conversions.
 
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