DR9002-CS 890424April 24, 1989
DeShazo, Starek & ~l~mg, Inc.
Engineers · Planners
Mr. Russ~l'T~Joyle, P.E.
City En,~qneer
City ~ Coppell
P.O.~ox 478
Co,ell, Texas 75019
RE: Hill Drive Drainage Improvements - Phase A
Dear Mr, Doyle:
On Tuesday, April 18, lg89, Paul Lipscomb, Paul Tucker and I met with
you and Shohre Daneshmand to discuss the project. Our minutes of that
meeting are summarized as follows:
1. We presented the results from a preliminary analysis based on
record information rather than field verification. The analysis
indicated that:
The actual drainage area for the alley appears to be approxi-
mately 5 times the design drainage area (2.6 acres rather
than 0.5 acres).
· The hydraulic capacity of the alley appears to be inadequate
based on the City's current design criteria.
Actual construction of the alley may have resulted in a
further reduction of the actual hydraulic capacity of the
alley.
· The four-foot inlet in the alley appears to be inadequate.
· Landscaping and marginal grading of the individual lots have
complicated the drainage problems.
Possible solutions could include: new inlets, storm sewers,
removal and replacement of portions of the alley, and individual
lot grading by the homeowners,
330 Union Station
Dallas, Texas 75202-4802
214/748-6740
Mr, Russell Doyle
April 24, 1989
Page Two
2, All concurred that we should proceed as follows:
· Meet with public works to get their input,
· Meet with homeowners to discuss their observations and con-
cerns.
· Initiate surveying after meeting,
· Prepare a schematic design of options,
This is our account of what transpired during the meeting, If you
have any questions or recognize any discrepancies, please do not hesi-
tate to call,
I have enclosed a revised schedule and a draft agenda for the
homeowners meeting for your review, Please forward your comments and
the executed agreement at your earliest convenience.
We look forward to hearing from you regarding the scheduling of our
next meeting,
Sincerely,
~avid E. kucado. P.E.
Project Manager
DEL/tde
Enclosure
89112