Maxwell,

 

I appreciate you taking the time to meet with Nick and I today and I am glad that we were able to finally get on the same page here. Per our conversation on the phone a bit ago, HALFF
used the factor of safety that was shown in your Global Slope Analysis for the design of the abutment at Ponte. Also as discussed, HALFF feels that the backfill material currently in
place at this abutment is good to go – this assessment is based on the data provided by Kleinfelder from the tri-axle testing they did on this material.

 

Per my discussion with you, if HALFF is ok with this material, you are ok with it. Please confirm.

 

Thanks,

 

Eric

 

From: Clay Barnett [mailto:cbarnett@addisontx.gov] 
Sent: Monday, January 10, 2011 11:10 AM
To: Eric T. Little
Cc: Nick Jacob; Tom Forrest
Subject: RE: Retaining Wall Backfill

 

Eric,

 

Please discuss this with Maxwell.

 

Thanks,

Clay Barnett, P.E.

Town Engineer

Town of Addison

16801 Westgrove Drive

Addison, TX 75001-2818

Office: (972) 450-2857

 <http://www.addisongreen.info/> 

 

From: Nick Jacob [mailto:PJacob@udr.com] 
Sent: Friday, January 07, 2011 4:58 PM
To: Clay Barnett
Subject: Fw: Retaining Wall Backfill

 


 

From: Maxwell Zhang [mailto:geoteleng@yahoo.com] 
Sent: Friday, January 07, 2011 01:26 PM
To: Nick Jacob 
Cc: Jonathan McCulley <JMcCulley@Halff.com> 
Subject: Retaining Wall Backfill 
 

Mr. Jacob, 

 

Based on the conversation with Jonathan McCulley with Halff Associates, Inc. today, he only needs lateral earth pressure of the materials with strength parameters provided by other consulting
firm.

 

The material tested does not meet the requirements as recommended in our Geotechnical report.  We understood that the material had been placed behind the retaining walls.

 

We do not feel comfortable to provide only lateral earth pressure without performing any studies of implications on global slope stability of the retaining walls by using lower strength
materials. 

 

I will be out of town next week.  I do not expect that we can complete the studies within two weeks.

 

Sincerely, 

 

Wei (Maxwell) Zhang, P.E., President 

GEOTEL Engineering, Inc.

2906 Ladybird Lane

Dallas, Texas 75220

972-850-2900

972-850-2901 (fax)

214-317-2950 (cell)

wzhang@geotelusa.com

geoteleng@yahoo.com

 

 

________________________________

This e-mail and any attachments transmitted with it are the property of GEOTEL and may contain information that is confidential or otherwise protected from disclosure. The information
it contains is intended solely for the use of the one to whom it is addressed, and any other recipient should destroy all copies. 

 

 

 

 

________________________________

From: Nick Jacob <PJacob@udr.com>
To: "geoteleng@yahoo.com" <geoteleng@yahoo.com>
Sent: Fri, January 7, 2011 1:17:23 PM
Subject: 

pjacob@udr.com

 

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