ST9902-CS121108 (3)
Halie Hernandez
From:Andrew Luce <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
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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