Northlake 635(7)-CS 980518H Iff Associate
ENGINEERS · ARCHITECTS · SCIENTISTS
PLANNERS · SURVEYORS
May 18, 1998
AVO 16800
Mr. Kenneth Griffin
c/o Michael Martin
City of Coppell
255 Parkway Boulevard
P.O. Box 478
Coppell, Texas 75019-4409
Dear Mr. Griffin,
Halff Associates, Inc. would like to submit an alternative pavement design for
Coppell Call Center in Northlake 635 Business Park. For the parking area, the alternative
design is 5 inch thick 4000 PSI compressive strength concrete with #3 bars, 18 inch
O.C.E.W. on compacted subgrade in lieu of the 5 inch thick 3000 PSI compressive
strength concrete with #3 bars, 24 inch O.C.E.W. on 6 inch lime stabilized subgrade as
shown in Appendix C of the City of Coppell Subdivision Ordinance. For the fire lane.
the alternative design is 6 inch thick 4000 PSI compressive strength concrete with #3
bars, 18 inch O.C.E.W. on compacted subgrade in lieu of the 6 inch thick 3000 PSI
compressive strength concrete with #3 bars, 24 inch O.C.E.W. on 6 inch lime stabilized
subgrade shown in Appendix C of the City of Coppell Subdivision Ordinance.
If you have any questions or require any additional information, please contact Pat
Acker or myself.
Sincerely,
HALFF ASSOCIATES, INC.
Todd Jackson
cc: Steve Huff
Ray Garrison
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