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Nove~er 26, 1991
FILE COPY
P.O. Box 478
Coppell, Texas 75019
Re: Wynnpage Estates
Coppell, Texas
90051-0
Dear Shohre:
We have made a field adjustment to the storm sewer system within
the referenced addition. In our original drainage plans, we
proposed to construct two fifteen foot inlets at the intersection
of Wrenwood Drive and Tealwood Drive to collect all of the 20.2 cfs
(100 year discharge). As you might be aware, the City of Coppell
Standard details indicate that 15 foot inlets are not allowed.
Therefore, we have proposed to construct two fourteen foot inlets
at this location which will still provide the capacity to collect
all of the 100 year discharge at this point without any bypass.
The actual capacity of two fourteen foot wide inlets on a 0.5
percent grade is approximately 28.0 cfs, which exceeds the actual
runoff into the inlets by over 39 percent.
I will revise our drawings accordingly and will include them with
our "as-built" plans which will be submitted to you upon completion
of this project.
If you have any questions, please feel free to call.
Sincerely,
Kevin R. Kendrick, P.E.
Project Manager
KRK/bp
xc: Mr. Jim Siepiela / Siepiela Interests, Inc. Mr. Waymon Levell / JWL Investments
Mr. Larry Davis / City of Coppell, Inspection Department
Mr. Gary Hendrix, P.E. / Shimek, Jacobs & Finklea
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PAUL S. UNZ)CKER P E DAVID M SCHNURBUSCH. P.E. KEVIN RAY KENDRICK. P.E DAV:D F. McCULLAH, R.P L S.
Pres dent V,ce President Pro;eot Manager · Associate Su~'ey Manage: · Associate