Hunterwood Park-CS100315Page 1 of 1
Keith Marvin - Hunterwood Park gabion inspection #2
From: "Clark, Joel" <jclark(�'.&raigoldeninc.com>
To: <jeliasgci.coppell.tx.us >, "Keith Marvin" <KMARVINgci.coppell.tx.us >, "James
Graeber" <pgraeber(asbcglobal.net>
Date: 3/15/2010 10:17 AM
Subject: Hunterwood Park gabion inspection #2
Attachments: Inspection 2 report (03-15-10).pdf
Gentlemen — please find attached inspection report. There are several items that need to be addressed. Please
call if you have any questions.
Thanks
-Joel
Joel R. Clark, P.E
Craig Olden, Inc.
Main (972) 294 -5000
Fax (972) 294 -2664
Direct (469) 287 -6105
Mobile (214) 537 -8635
iclark -craigoldeninc.com
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OLDEN
Craig Olden, Inc.
March 15, 2010
Mr. John Elias
City of Coppell Parks and Recreation Dept
255 Parkway Boulevard
Coppell, Texas 75019
ielias @ci.coppell.tx.us
Re: Hunterwood Park Improvements / Project D08710
N Report of 03 -11 -10 Site Inspection
L
We performed an inspection of the initial stages of rock riprap and gabion installation at 3:00 p.m. on
March 11, 2010. Our observations were as follows:
N
Q)
L 1. There were numerous tying deficiencies observed on the Area #1 structure. The deficiencies
included not using the double loop method and exceeding the 5 inch spacing per the
O specifications. Contractor should refer to Section 3.4 of Gabion Specifications including Figure
1 for correct tying procedure and make the appropriate corrections to bring the gabion
` O O structure within conformance. As noted in the specifications, "PROPER TYING OF GABIONS AT
H ALL STEPS IN THE ASSEMBLY AND CONSTRUCTION OF THE GABION STRUCTURE IS CRITICAL TO
44 THE PERFORMANCE OF THE FINISHED GABION STRUCTURE ". The Area #2 structure was not
inspected with respect to tying; however, the same specifications apply and should be
■� adhered to for those gabions.
2. Per the gabion specifications, special attention shall be given that all projecting sharp ends of
y wire are turned in on the completed gabion structure. Numerous projecting wires were
observed on the Area #1 gabions which need to be addressed for all gabions.
■ 3. The 12" gabion slope protection at the downstream end of Area #1 does not have 3' x 3'
= nominal square cells per the referenced specifications. The cells are nominally 6' x 3' or larger
and the lid mesh is already bulging and gapped which will allow long -term migration and
consolidation of the rock within the cells and diminish the performance of the gabion. In
tt order to bring the gabions into conformance, we recommend removing the lid mesh,
emptying the rock, and installing additional 3' x 1' diaphragms to the base unit to achieve 3' x
3' nominal cells.
W 4. At least two points of non - closure were observed on the Area #1 gabions (i.e., there is a hole
in the gabions where they were either cut or not tied correctly). These deficiencies and any
other similar ones should be corrected.
5. It was observed that the 4" cedar was cut and removed to the trunk at Area #2. We presume
that the City approved this removal, as it was neither called for in the plans nor required in
our opinion. The City should coordinate with the Contractor should it wish to require
mitigation for this tree or any others that were removed.
6. At Area #2, a portion of the row 3 gabions were installed prior to completing the backfill up to
the top of row 2 gabions which allowed the row 3 gabions to settle and tilt backwards. As a
result, the top /front edge of the row 3 gabions is approximately four inches out of plane. The
backfill was very loose and did not appear to have been compacted sufficiently. To correct
this, the row 3 gabion should be removed and the backfill should be compacted sufficiently up
P.O. Box 5000, Little Elm,TX 75068 • 972.294.5000 • 1.800.422.4667 • Fax 972.294.2664 • www.oldeninc.com
to the top of row 2 gabions before installing the row 3 gabions. The remaining backfill should
be well compacted and sequenced such that the remaining gabion rows are not allowed to
settle /tilt.
7. Rather than cut the gabion rows per plan, the existing rock /masonry steps at Area #2 were
partially removed to construct the gabions. The City should determine what, if any measures
should be taken to restore the steps.
We are available to meet onsite to discuss any of these issues. Otherwise, a third inspection will be
performed next Monday (time to be determined).
Sincerely,
CRAIG OLDEN, INC.
Texas Engineering Firm No. F -10869
... L CLARK ... O
.. .. ....
a C NSE .• i
v
tr i
Joel R. Clark, P.E. ✓/ r /v `\
cc: Keith Marvin, P.E. —City of Coppell
Kyle Whitis, P.E. — Pacheco Koch Consulting Engineers
Payton Graeber — Utz Environmental
Page 1 of 1
Keith Marvin - RE: Hunterwood Park gabion inspection #2
From: "Clark, Joel" <jclark(�'.&raigoldeninc.com>
To: "James Graeber" <pgraebergsbcglobal.net >, <jeliasgci.coppell.tx.us >, "Keith Marvin"
<KMARVIN(aci. coppell.tx.us>
Date: 3/15/2010 1:20 PM
Subject: RE: Hunterwood Park gabion inspection #2
Thanks Payton. Please refer to inspection report for a list of items. Feel free to call if you have any questions.
-Joel
From: James Graeber [mailto:pgraeber @sbcglobal.net]
Sent: Monday, March 15, 2010 1:13 PM
To: Clark, Joel; jelias @ci.coppell.tx.us; Keith Marvin
Subject: Re: Hunterwood Park gabion inspection #2
Gentlemen - My forman informed me on Friday that there were some things that needed to be adressed. We
have already started working on these issues.
From: "Clark, Joel" <jclark @craigoldeninc.com>
To: jelias @ci.coppell.tx.us; Keith Marvin <KMARVIN @ci.coppell.tx.us >; James Graeber
< pg raeber @sbcg lobs I . net>
Sent: Mon, March 15, 2010 10:11:00 AM
Subject: Hunterwood Park gabion inspection #2
Gentlemen — please find attached inspection report. There are several items that need to be
addressed. Please call if you have any questions.
Thanks
-Joel
Joel R. Clark, P.E
Craig Olden, Inc.
Main (972) 294 -5000
Fax (972) 294 -2664
Direct (469) 287 -6105
Mobile (214) 537 -8635
jclark -craigoldeninc.com
This e -mail (including any attachments to it) is intended solely for the use of the individual(s) or entity
named above. It may contain confidential or privileged information. If you are not the intended
recipient, you are hereby notified that any dissemination, distribution or copying of this communication
is strictly prohibited. If you have received this communication in error, please notify the sender
immediately and delete the original message.
This e -mail (including any attachments to it) is intended solely for the use of the individual(s) or entity
named above. It may contain confidential or privileged information. If you are not the intended
recipient, you are hereby notified that any dissemination, distribution or copying of this communication
is strictly prohibited. If you have received this communication in error, please notify the sender
immediately and delete the original message.
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