SS9901-CS040805 9?2 ?35 3002 9.6K
RUG 05 2004 15:18 FR TURNER COLL[ES BRADENg?2 ?35 3002 TO 99?230435?0 P.01/03
Turner Collie Braden Inc.
Engineers · Planners · Project Managers
17300 Dallas Parkway
Suite 1010
Dallas, Texas 75248
972-735-3000
Fax: (972) 735-3001
DATE:
TO:
FROM:
August 5, 2004
Rick O' Dell
Erika Cooper
# OF PAGES
FAX NUMBER: (972) 304-3570
PHONE NUMBER: (972) 735-3056
(If transmittal is incomplete or unclear, please
call sender directly at this number.)
REMARKS:
Rick,
Attached is a copy of my email reply to Greg Wood at Mastec regarding the air vacuum/
air release valve at Station 15+80.
Thanks,
Erika
An AECOM Company
AUG 05 2884 15:18 FR TURNER COLLIE& BRADEN9'72 ?:~5 3002 TO 99?230435'78 P.02/03
Air Release Manhole
Cooper, Erika
Page 1 of
From:
~ent.'
To:
Cooper, Erike
Thursday, August 05, 2004 2:54 PM
'Crag Wood'; 'kgriffin~ci.coppelLtx.us'
Roger Cote; Robbia Dupree
Subject: RE: Air Release Manhole
Greg,
Per our telephone conversation yesterday, we have reviewed the profile in the vicinity of Station 15+80 and have verified that an
air vacuum/air release vane is needed at this location because it is a high point in the line. This should not be an additional
valve/manhole location, as the plans require a valve at every access pit location.
We understand there is not sufficient depth at this location to install the valve with the clearance shown in the detail on Sheet 30
of 60 (3 ft from top of manhole to top of valve). The primary concern with the limited clearance is accessibility of the valve for
maintenance. I spoke to Rick O'Dell this morning regarding this issue, and he suggested the use of a fiat-top manhole, This
would reduce the amount of clearance required above the valve. The cover Could be offset so that it is not directly over the valve,
which would allow for maintenance personnel to enter the manhole and access the valve. Rick and I also discussed the fact that
the top of the manhole would need to be raised above ground surface to prevent ponding of water over the manhole, He would
like to keep the top of the manhole around 6 inches above ground surface if at all possible. Based o~ the height of the tee and
valve assembly, what is the distance from the flowline of the pipe to the top of the valve? Is there sufficient depth if a fiat-top
manhole is used. or will the top of the manhole need to be raised? If so, how high wirl the top be above ground surface? Let me
know Jf this sounds like a viable $oJution, and we c~n have further discussions with Rick if necessary. Jf you h,~ve ar~¥ O~her
recommendations, we would be more than happy Io discuss those as well.
Thanks,
Erika
Erika Cooper. P.E.
Turner Collie & Braden, Inc.
17300 Dallas Parkway - Suite 1010
Dallas. Texas 75:Z48-1145
972-735-3000
Fax 972-735-3001
Direct 972-735-3056
Email erika.cooper@tcb.aecomcom
..... Original Message- ....
From: Greg Wood [mailto:Greg.Wood@mastec.com]
~ent: Wednesday, August 04, 2004 1:38 PM
TO: Cooper, Erika; 'kgriffin@ci.coppell.tx. us'
C¢: Roger Cole; Robbia Dupree
~ubje¢l:; Air Release Manhole
%mportance: High
Erika.
Maetec has installed the bore under $. Village Pkwy. The question that has arisen is that Rick O'Dell has requested an
Air Release Manhole be installed at approximalely station 15+80 on Sheet 12 of 60. We have this bore in at the depths
shown on the prints. This depth is approximately 8-6". We would not have been able to get the depth needed due to the
existing 10" sanitary sewer that was crossed during bodng In order to install an Air Release Mar~hole we need to be
around 11-6". We discussed this with Rick O'Dell this morning and he suggested that we send you this emaiL We had
not planned on putting an Air Release Manhole at this location because it was a designed change in grade per the plans.
If one is needed close to this location we would need to look at the additional cost of purchasing and installing another
Manhole structure. Please let Mastec know what needs to be done to keep things moving and all parties involved on the
same page and happy with whatever is decided. Thanks and if you have any questions please contact me at the
numbers below.
8/5/2004