Park West CC(6)-CS 980119 January 19, 1998
Ken Griffin, P.E.
City Engineer
City of Coppell
255 Parkway Blvd.
Coppell, TX 75019
Re: IBM Call Center at Park West Commerce Center
Dear Mr. Griffin:
Prentiss Properties Ltd. (PPL) would like to formally request a lime stabilization variance
from the City of Coppell's subdivision ordinance for our automobile parking areas and
truck court areas.
Attached is HBC Engineering, Inc.'s letter to Mike Martin (dated December 31, 1997)
outlining their minimum requirements on unstabilized, compacted subgrade for the parking
and truck court areas. In lieu of lime stabilization as required by the City of Coppell, we
are requesting that we be allowed to install 5 inches of 4,000 psi concrete and 6 inches of
4,000 psi concrete in the automobile parking areas and truck court areas, respectfully, as
indicated on our Paving Dimensional Control Plan dated November 17, 1997.
If you have any questions or concerns, please contact me as soon as possible as we plan to
pour part of the parking area this week for our temporary job site office. Thank you again
for your staWs continued assistance with our project.
Sincerely,
&-
Davis H. Glass, Jr., AIA
PIIENTISS PROPER'FIES
3890 ~'ESI' .N'ORTIt~, EST H~I,Y., SL~I'rE 400 I)~I.1..XS, I'I-:XAS 75220
21.$ 654-0886 FAX: 214 65-1,-5818
December 31. 1997
City of Coppell ENGINEERING. INC.
255 Parkway Boulevard
Coppell. Texas 75019
Attn: Mr. Michael A. Martin
Assistant City Engineer
Re: IBM Call Center
Dear Mr. Martin:
HBC Engineering, Inc. (HBC) provided the geotechnical investigation for the above referenced
project and reported the results to Prentiss Properties in our report number 42-1823-96 in August.
1996.
The tbllowing summarizes the pavement scctions presented in the report.
.Automobile Parkin~Lots
5" of 3000 psi concrete on an unstabilized, compacted subgrad
Truck Areas (up to 40 daily repetitions) ~ &OO o p ~
7" of 3500 psi concrete on an unstabilized, compacted subgrade.
For both sections the subgrade is to be unifbnnly compacted to a minimum of 95 percent
D 698 at -1 to +3 percent of the optimum moisture content determined by that test.
Please contact us if there arc any questions, or if we can provide additional inibrmation.
Sincerely.
Ralph Wml~. Jr.. ~.E. ~ , .
Principa r
c~~rentis~rties- -- Limited
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