Devonshire 1-CS 920219MEMO
PUBLIC WORKS
TO: Kenneth M. Griffin, P.E., City Engineer
FROM: M. Shohre Daneshmand, P.E., Civil Engineer
SUBJECT: Devonshire Estates
Retaining Wall Along Coppell Road
DATE:
February 19, !992
As per your request, I have reviewed the above referenced project file as
it relates to construction of the retaining wall. ! provide the following
comments based on my knowledge and findings:
The sidewalk construction along Coppell Road at the Devonshire
site had been analyzed by Carter and Burgess, Inc. (the
Engineer). Basically, three (3) options had been looked at in
order to provide a pedestrian access to the elementary school.
(See attached letter dated 5/16/91)
Option #3 was recommended by Staff which would have basically
eliminated the open ditch, only along Devonshire, and
replaced by a closed storm system. The engineer provided staff
with related documents, mainly estimated construction cost
associated with proposed storm systems. (See attachment dated
3/7/91.)
After a couple of meetings among the engineer, the developer
and affected City Staff members, it was determined that such
partial drainage improvement along a substandard street was
costly and may not be the best interim solution. It was the
developer's intent to use the funds he had escrowed for future
widening of the Coppell Road ($72,000[) toward such drainage
improvement. This option raised some general concerns,
The engineer at that time, on behalf of his client, recommended
that some improvements be made to the existing channel in the
interim period, as shown on the attached cross-section.
Please note that the construction of said retaining wall was intended to
be an interim solution while the pedestrian access to the school and the
drainage issues were being addressed. Improvements to Coppell Road are
highly recommended, especially along the school and this subdivision. See
attached correspondence from Shimek, Jacobs & Finklea dated 10/9/91.
Please let me know if you have any questions.
DEVME~/bd