Alexander Ct-CS080917Fence
Ken Griffin -Fence
From: "Dan Buhman" <dan.buhman @buhwater.com>
To: "'Ken Griffin "' <kgriffin @ci.coppell.tx.us>
Date: 9/17/2008 10:41 AM
Subject: Fence
Attachments: WorkMap.pdf
Ken,
Page 1 of 1
went back and looked at the cross sections. I apologize that I did indeed use sections
too far downstream — my oversight (long weekend) and I'm sorry this took up your time
unnecessarily. The sections in question (27050 and 26880) have ROB n values of 0.075
and 0.07. When I increased it to 0.08, it did indeed show a rise upstream. The other
change I made was that I was using the Floodway geometry file (hence the
encroachments you saw) to be conservative — I went back to the original floodplain
geometry without encroachments.
will discuss with the homeowners the option of adding cross sections to produce more
detailed modeling.
Please let me know if you have any thoughts on this.
Thanks,
Dan Buhman, P.E.
Buhman Associates, LLC
Mobile: 214 - 864 -1555
dan.buhman @buhwater.com
file: HC: \Documents and Settings \radloo \Local Settings \Temp \XPgrpwise \48DODEEACity... 2/22/2010