SC-Mockingbird E4-CS 900525 MEMORANDUM
May 25, 1990
John Karlsruher, Ginn Inc.
Steve Goram, Director of Public WorT
Request of Variance CISD Paving
COPPELL PUBLIC WORKS
Please review the attached request and provide me with your
comments and recommendations by May 31, 1990. Thank you.
SGG/bb
xc: H. Wayne Ginn,
Attachment
Ginn Inc.
SHWC, INC.
ARCHITECTS
ENGINEERS
PLANNERS
/~ HUR BLVD,, P.O. BOX 819087 DALLAS. TEXAS 75261 214/550-0700
PARAC-ON CENTER ONE, 450 GEAJ~ ROAD, surrE 770 HOUSTON, TEXAS 770~7 713/87~
1801 CENTRN. BLVD., P. O. BOX 3347 BROWNSVILLE, TEXAS 78520 512/546-5511
(~ 12200 SUNRISE VALLEY DRIVE, SUITE 110 RESTON, VIRGINIA 220911 70~/648-1740
·
T R A N S M I T T A
or~, e~
JOB NO:
PROJECT:
GENTLEMEN:
We are enclosing (herewith) ~.~.'~. . ............ ) the oflowing items:
REMARKS:
SHWC, INC.
Architects Engineers Plonners
May 3, 1990
Mr. Steve Goram
Director of Public Works
City of Coppell
732 Deforest
Coppell, Texas 75019
RE:
Coppell Elementary School
Mockingbird Lane Site
Dear Mr. Goram:
On behalf of Coppell I.S.D., SHWC, Inc. requests a hearing of the Coppell City Council
on a variance for the above mentioned project.
Coppell I.S.D. would like to request a change from the present requirements of 6' thick
concrete paving to 5' thick concrete paving in the parking and light traffic areas. All bus
and service drives will be constructed with 6' thick concrete paving. All concrete paving,
whether 5' or 6', will be installed on lime stabilized sub base.
This request is being made based on the information provided by Maxim Engineers,
whose soil investigation indicates that a 4' thick concrete pavement section for the park-
ing and light traffic areas is sufficient for these selected areas. I have Included the sec-
tion of this soils report pertaining to pavement recommendations for your review.
Coppell I.S.D. applied for and was granted this very same request at the high school
parking areas, and Austin Elementary's concrete paving was constructed under these
same details.
I would appreciate your consideration of this request and would like to be considered for
the eadiest possible date for the City Council's upcoming meeting.
Should you need any additional information please do not hesitate to call me. Thank
you for your assistance in this matter.
Sincerely,
SHWC, Inc.
Gary D. Keep
Senior Vice President
GK:kc
Enclosure
SHWC, INC ARCt-~ *~CzS ~'NGr'~EERS P.AFJ~4~PS 5601 MAC ARTHU~ BLVD *FOURTH FLOOR.LAS COLINAS*20 BOX619087*'DAL~AS, TEXAS 7526i .(214) 550-070~
GEOTECHN I GAL INVESTIGATION
FOR
PROPOSED ELI/MENTARY SCHOOL
MOCKINGBIRD ROAD
COPPIgLL, TEXAS
REPORT NO. S-6-0123
REPORT
to
INC. ARCHITECTS,
IRVING,
ENGINEERS 8 PLANNERS
TEXAS
by
MAXIM ENGINEERS. INC.
GEOTECHNICAL/MATERIALS TESTING/CONSULTANTS
DALLAS, TIgXAS
!
!
March 19, 1986
Paving Recommendations
Prior to beginning pavement construction, soils at the natural
ground surface in the proposed parking area should be scari-
fied and grubbed to a depth of at least six (6) inches.
Organic materials and any vegetation should be removed from
the site. The scarified areas along with areas requiring
additional fill should then be recompacted to a minimum of 95
percent of the Standard Proctor Density as defined by ASTM D
698 at a moisture content between optimum and five (5) percent
above the optimum moisture value.
The following pavement sections are recommended for this
project:
I
I
I
I
I
I
I
I
4 o 0 inches
6.0 inches
1.5 inches
4.0 inches
6.0 inches
Light Duty Parking
Portland Cement Concrete*
(15 foot joint spacing)
Scarified and Recompacted Subgrade
or
HMAC** Surface Course
HMAC** Base Course
Lime Stabilized Subgrade**
*See Guidelines for Concrete Parking Areas in the Appendix of this report.
**Should meet Texas Highway Department Specifications.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
6.0 inches
6.0 inches
2.0 inches
5.0 inches
6.0 inches
Areas of Channelized Traffic
Portland Cement Concrete*
(15 foot joint spacing)
Scarified and Recompacted Subgrade
or
HMAC** Surface Course
HMAC** Base Course
Lime Stabilized Subgrade**
8
The light duty pavement is designed for 20(] to 300 vehicles
per day, five (5) to seven (7) of which may be heavy
commercial trucks. The channelized heavy traffic pavement is
designed to sustain 300 to 500 vehicles per day including
eight (8) to ten (10) heavy commercial vehicles.
*See Guidelines for Concrete Parking Areas in the Appendix of this report.
**Should meet Texas Highway Department Specifications.