DR9001-CS 890712 GINN, INC.
July 12, 1989
I'A ! ¢
C()NSI L! IN(;
I£NGINEERS
Mr. Russell Doyle, P.E.
city of Coppell
P.O. Box 478
Coppell, TX 75019
Re: Connell Skaggs Addition
Box Culvert Along West Property Line
Dear Mr. Doyle:
Pursuant to your request for review of the above referenced
project, we offer the following comments.
We reviewed the pla~s submitted by
conjunction Wi%h t~e ~ttached letter.
found the following:
Powell an~ Powoll, ~n
In a cursory review we
In lieu of a 10'x8' box culvert from Sandy Lake Road
northward to north of Willow Lane, proposal is to construct
2-12'x4' box culverts along Connell Skaggs Addition; open
channel with 3 to 1 side slopes along Boorhem property; and,
open channel with 1.5 to 1 side slopes along Hinckley
property.
If the 2-12'x4' boxes were extended the full length, (ie.,
no open ditches) and connected to the 10'xS' at Willow Lane,
then from a hydraulic standpoint there would be no
appreciable difference in what was previously proposed and
what the revision in proposing.
The ditch along Hinckley's property is not adequately sized
to handle the anticipated flows.
Both ditches, as proposed, do not meet City of Coppell
standards, criteria, or subdivision ordinance requirements.
Other than stated above, we have no further comments or concerns.
Should you have any questions, please contact us.
Sincerely,
il. Wayne Ginn, P.E.
HWG/GF/dsp
cc: Jim Koch, P.E., Powell and Powell
Mark Connell, Connell Development Co.
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