UKTC Archive

RE: Holes drilled in tarmac under a tree canopy..

Subject: RE: Holes drilled in tarmac under a tree canopy..
From: Richard Bryson
Date: Dec 22 2009 15:57:39
Hi Nick,

Correct me if I'm wrong but you said, 'The intended surface is to be a porous 
tarmacadam in a large aggregate with a series of holes drilled at 200mm 
centres'. Why would they be drilling holes in a porous final surfacing? I 
seem to remember that the drilling at calculated spaces with granular infill 
was to do with the laying of non porous materials such as concrete.

Have they spoken to Roy at Geosynthetics? he could advise on such matters. I 
would suggest a Cellweb substructure with porous tarmac or blocks when 
constructing parking within a RPA.

Happy holidays!

  

Regards
 
Richard Bryson
 
AllAboutTrees Ltd
Arboricultural & Ecological Consulting
Chartered Arboriculturalists & Environmentalists  
Unit B10 Durham Dales Centre
Castle Gardens
Stanhope
Co Durham
DL13 2FJ

Phone  0191 XXXXXXX
             01388 XXXXXX
Fax        01388 XXXXXX
 
www.allabouttrees.co.uk
 
 Help the environment, do you really need to print this E-mail?
 
This e-mail and any attachments are confidential and may be privileged.  They 
are intended solely for the use of the individual or entity to which they are 
addressed.  If you have received this e-mail in error you should notify the 
sender by e-mail.  If you are not the intended recipient you should not copy, 
use, distribute or disclose its contents or attachments to any person.  
Unauthorised use or disclosure is prohibited and may be unlawful.
 
This e-mail message and its attachments have been checked with virus 
detection software.  Whilst AllAbouttrees Ltd has taken reasonable 
precautions to minimise the risk of software viruses, it cannot accept 
liability for any damage which you may suffer as a result of such viruses.  
We recommend that your own virus checks are undertaken prior to opening any 
attachment.

-----Original Message-----
From: Nick Hammick [mailto:Nick.Hammick@xxxxxxx.gov.uk] 
Sent: 22 December 2009 15:32
To: UK Tree Care
Subject: Holes drilled in tarmac under a tree canopy..

Dear Forum
 
Further to a drawing received to discharge a specific planning condition, the 
following detail is given - 
 
The intended surface is to be a porous tarmacadam in a large aggregate with a 
series of holes drilled at 200mm centres.
 
Holes to be filled with fine gravel to allow water to pass through and not 
clog up any other material.
 
Tarmac to be capped with a resin bound aggregate at 20mm thickness - which is 
totally porous allowing surface water to percolate through to the drain holes 
below.
 
Wall to wall tarmac has been laid here; in mitigation, they have proposed to 
drill holes at 200mm centres and undertake the above, over an area 
approximating to 2no car park spaces.  
 
Now, we are fairly o.k with the resin bound element...my concerns are.. the 
size of the ' fine gravel '  to be used.  Too fine and it'll be fines eh!
 
Also, is it realistic to expect to be able to undertake/achieve these 
drillings at this density?  A calculation for the number of proposed drilling 
comes out at approx 570 for 2no. spaces @ 4.8m x 2.4m each.......won't it all 
just crumble to bits?
 
My instinct is to get the tarmac removed completely, given that resin bound 
aggregate was originally proposed here, but.....
 
Your collective wisdoms please and Happy Holidays to all.
 
Regards........
 
Nick Hammick
Tree Officer
---------------------------------------------
Development Control | London Borough of Merton<?xml:namespace prefix = o ns = 
"urn:schemas-microsoft-com:office:office" />

Civic Centre | Morden | Surrey | SM4 5DX

 

( tel:  020 8XXX XXXX      
(fax: 020 8XXX XXXX



+ nick.hammick@xxxxxxx.gov.uk

 

ü    www.merton.gov.uk/planning    

 

 Validation checklists must be adhered to when submitting a new application:

http://www.merton.gov.uk/living/planning/valid-checklists.htm


 <http://www.merton.gov.uk/living/planning/1app-consult.htm> 

 

 

 
 
 
 

^**********************************************************************^
Reduce waste - please do not print this message unless you need to.

This email and any files transmitted with it are intended solely for the use 
of the individual or entity to whom they are addressed. This email may 
contain information that is confidential and may contain sensitive or 
protectively marked information up to RESTRICTED and should be handled 
accordingly. This communication may be subject to recording and/or monitoring 
in accordance with relevant legislation. If you have received this email in 
error you must not copy, disclose or make any further use of the information 
contained within it. Instead we request that you notify the system manager.
Postmaster@xxxxxxx.gov.uk
http://www.merton.gov.uk
**********************************************************************




-- 
The UK Tree Care mailing list
To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by The Arbor Centre
http://www.arborcentre.co.uk/




-- 
The UK Tree Care mailing list
To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by The Arbor Centre
http://www.arborcentre.co.uk/