Brighton Manor-CS040428T H £ C I T Y 0 F
COP?ELL
April28,2004
Rodney Louviere
Dowdey, Anderson & Associates, Inc.
5225 Village Creek Drive, Suite 200
Plano, TX 75093
RE: Brighton Manor (Falls at Westmont)
Dear Mr. Louviere:
Observations I made today onsite revealed the utility contractor in the process of
performing mandrel testing, air testing and televising of the sanitary sewer line that was
recently laid. While we appreciate the proactive approach to required testing, I must
stress to you that any testing results gathered at this stage of construction might be
premature and misleading.
According to my letter of April 26, there remains the concern of exposed shale deposits
in many trench line areas. My concerns over the possibility of voids in the water and
sanitary sewer trench lines may have already been substantiated by Texas CMT's backfill
report from April 23rd (see attached report).
Proper bedding material and preparation must be observed and documented in the utility
trench lines already excavated and in all those scheduled to be excavated in the future on
this project. Please make immediate corrections where needed. If you have any
questions, please contact me at (972) 304-3684.
Ken Griffin, P.E., Director of Engineering & Public Works
Jim Street, Street Custom Homes
Richard Gee, P.E., Texas CMT
Keith Marvin, P.E., Civil Engineer
Scott Camthers, P.E., Dowdey, Anderson & Associates
Construction Materials Testing
and Environmental Consulting
Texas
CM%
Inc
10044 Monroe Drive Dallas, Texas 75229 (214) 352-6957
Fax (214) 352-6972 www .texascmt.com
GENERAL REPORT
Report Date
Client
Project
April 26, 2004
Street Custom Homes
Brighton Manor
Test Date: April 23, 2004
General Report No.: 1
Project No.: 204-0126
Texas CMT technician was present on April 26, 2004 to observe trench backfill operations.
The folloWing outstanding observations were noted: ~
1. C. Con Cooper was backfilling Light Gray Gray up
with
Shale
&
Dark
Shale
in
chunks
to
24"x12"x6" in water main line and water crossing.
2.There was no bedding material under the water crossing, was laying on large
line
Line
chunks of Dark Gray Shale.
3. Per COG specs, we recommended no rock fragments larger than six (6) inches be utilized as
utility trench backfill. Shale chunks should be mixed with enough fines to prevent voids.
Technician: DF
,'~k. Larry Davis - City of Coppell
M~ Rochney Louviere - Fax: 972-931-6787