ST9902-CS121108 (5)
Halie Hernandez
From:Andrew Luce <ALuce@TNPINC.com>
Sent:Thursday, November 08, 2012 4:48 PM
To:Keith Marvin
Cc:Mike Jones; Chris Schmitt
Subject:RE: Minimum Storm Drain Pipe Size
Keith,
My apologies, it won’t happen again. Thank you for the answer on the drainage.
Andrew
From: Keith Marvin [mailto:KMarvin@coppelltx.gov]
Sent: Thursday, November 08, 2012 4:24 PM
To: Andrew Luce
Cc: Mike Jones; Chris Schmitt
Subject: RE: Minimum Storm Drain Pipe Size
Andrew,
We don’t have any objection to the 18” pipe size, provided it has the capacity.
On a separate note, please copy me on correspondence you have with the franchise utility companies concerning this
project. We like to document that correspondence in our project files, and if Atmos had not copied me on their
response, I would not have had a record of it.
Keith Marvin, P.E.
City of Coppell
972-304-3681
From: Andrew Luce [mailto:ALuce@TNPINC.com]
Sent: Thursday, November 08, 2012 3:48 PM
To: Keith Marvin
Subject: Minimum Storm Drain Pipe Size
Keith,
In the City of Dallas Drainage Design Manual, page 13 states that any inlet 10’ or larger shall have a minimum lateral pipe
size of 21”. In the previous Sandy Lake Rd. (S. Coppell to Denton Tap) submittal from May 2012, there were 7 laterals
(F1-11, F1-13, G-1, H1-1, H1-2, H1-3, H1-4) that had inlets 10’ or larger with lateral sizes of 18”.
Should these laterals be changed to a 21” pipe size or would you prefer to leave them as 18” lines? There were no City
comments in regards to these line sizes in the last submittal, so I wanted to verify with you before I changed anything.
Thanks,
Andrew
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Andrew Luce, P.E.
Project Manager
1100 Macon Street
Fort Worth, Texas 76102
817.336.5773 Main
817.665.8208 Direct
817.336.2813 Fax
aluce@tnpinc.com
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