Shake & Shingle-CS 851016GINN, INC. CONSULTING ENGINEERS
October 16, 1985
Mr. Pete Hennessey, P.E.
Hennessey Engineering, Inc.
1409 Third Street
Carrollton, Texas 75006
Re: Shake and Shingle
Coppell, Texas
Dear Mr. Hennessey:
We are in receipt of a copy of a letter to Mr. Steve Goram
concerning the above referenced project. We also received a
copy of the geotechnical investigation firm's comments. The
following sets forth our comments.
The geotechnical investigation report suggests that "prior to
concrete placement, the subgrade should be scarified to a
depth of 6 inches and recompacted to at least 98 percent of
Standard Proctor maximum dry density at or within 3% of
optimum moisture content." with an additional small amount
of effort and cost, lime stabilization of the subgrade could
be completed at that point in time. The report noted, and we
agree, that overall maintenance costs may be higher without a
lime stabilized base.
Even though this is not a dedicated City street and the City
will not be responsibile for maintenance, we would suggest
the lime stabilized base be employed in lieu of the increase
of concrete thickness from 6 inches to 7 inches.
We are not "disapproving' the substitution of the seven-inch
thickness of concrete for the 6" concrete over 6" lime
stabilized base; but are suggesting the latter may be the
better design consideration. The testing lab report seems to
support this also.
Sincerely,
GINN, INC.
City Engineer
Gabe Favre
cc: Robert & Kathy Ingle
Steve Goram
16135 Preston Road · Suite 106 · Dallas, Texas 75248 · Phone 214/386-6611