Mansions Phase 1-CS 971120 Rone En~ineers~ Inc. . 121 North Rayner Street Tel. (817) 831 -~11
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! F~ (817) 834-4833
November 20, 1997
Western Rim Services
2400 North Highway 121, Suite 107
Euless, Texas 76039
Attn: Mr. Richard E. Simmons
RE: ADDENDUM #2 TO REPORT 513-6-237-01
PAVEMENT RECOMMENDATIONS
THE MANSIONS BY THE LAKE
COPPELL, TEXAS
Dear Mr. Simmons:
The following confirms our conversation of November 20, 1 997 regarding pavement
and subgrade preparation for the above referenced project. Rone Engineers Inc.
performed the geotechnical investigation for this project with results presented in
Report No. 51 3-6-237-01 dated July 16, 1997.
An alternate pavement option, compared to that presented in the above referenced
report, consists of thickening the Portland cement concrete pavement by one inch and
thereby eliminating the lime stabilized subgrade. This would thereby cause the
concrete thickness in channelized traffic areas would be 7 inches. The existing
subgrade would still be required to be scarified and recompacted, in accordance with
the recommendations in the report. To reduce the potential for subgrade pumping,
it is recommended that construction joints have a geotextile below the joint itself.
Assuming the width of the geotextile to be 8 feet, the actual joint should be on the
centerline of the 8-foot width, allowing 4 feet of geotextile on each side of the joint.
The owner may wish to utilize a Contech Construction Products, Inc. geotextile called
Contech C-60 NW or equivalent.
It is important that the owner provide aggressive maintenance of the pavement in the
future. This will include periodic observation of the pavement for cracking and proper
sealing of cracks to prevent/abate moisture migration below the pavement structure.
Geotechnical & Environmental Consultants, Materials Engineering E ~ron ental Explorahon
and ' . .. i(
Western Rim Services
Report No. 513-6-237-01
November 20, 1997
Page 2
We appreciate the opportunity to provide this letter. Please contact us should further
questions arise on information contained herein.
Very truly yours,
RONE ENGINEERS, INC.
Vice President
Texas No. 46088
CMJ/cms
Copies submitted: (2) Mr. Richard E. Simmons; Western Rim Services
(1) Mr. Joseph Reue; Washington & Associates, Inc.
Rone Engineers