ST0502A-CS140814
Halie Hernandez
From:Michael Garza
Sent:Thursday, August 14, 2014 4:34 PM
To:Halie Hernandez
Subject:FW: Backfill Behind Gabions at Freeport Pkwy.
Can you file this email in st-05-02a
Michael Garza, P.E.
Assistant Director of Engineering
Engineering Department
City of Coppell, TX
www.coppelltx.gov
972-304-7019 (office)
Please take our customer service survey
From: richardgee@geeconsultants.com [mailto:richardgee@geeconsultants.com]
Sent: Wednesday, August 13, 2014 12:24 PM
To: Michael Garza
Cc: mholmes@tnpinc.com; fluyando@cdbuilderspr.com; Pant, Hem
Subject: Backfill Behind Gabions at Freeport Pkwy.
Mr. Garza:
Confirming and expanding our telephone conversation with Mr. Francisco Luyando with CD Builders this
morning.
CD Builders is excavating less than one (1) foot behind the currently constructed gabion baskets. In lieu of
compaction of on site fill material we recommend they substitute size 57 gravel or clean pea gravel behind the
baskets with less than one (1) foot width of excavation. This assumes the material beyond one (1) foot behind
the gabion baskets is natural soils, has not been disturbed and is not existing fill material. If the material beyond
one (1) foot behind the back side of the gabion wall basket has been disturbed, is not natural material or is
existing fill material it will require excavation and replacement in thin horizontal lifts under controlled
conditions and density tests performed. The top row of gabions shall still utilize on site materials as backfill,
placed in thin tested horizontal lifts and trimmed to the required shape.
All existing plans and specifications remain valid. Safety and trench shoring is the responsibilty of CD Builders.
If you have any questions please feel free to contact us.
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GEE Consultants, Inc.
Richard W. Gee, P.E.
President
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