Copperstone FS-CS 890328 oms
Kimley-Horn and Associates, Inc.
12660 Colt Road, Suite 200, Dallas, Texas · (214) 386-7007
Raleigh, Charlotte, Nashville, Virginia Beach, Dallas, Phoenix,
West Palm Beach,Tampa, Orlando, Ft Lauderdale, Vero Beach, Ft Myers, Stuart
March 28, 1989
Mr. Russe/Di o~le
City Eng/neer
City of~oppell
732 De Forest
Coppell, Texas 75019
Re:
Review of Floodplain Reclamation Study by
Jerry Parche' Consulting Engineer
Dear Mr. Doyle:
We have reviewed the subject study and we offer the following comments: (all references to articles
refer to Coppell City Ordinance Number 87390)
Article 4C-2 requires that all models must evaluate discharges for the 2-year, 100-year
existing, 100-year ultimate and low flow conditions. The subject study only considered the
100-year existing conditions.
Article 4C-2(a) requires that the lowest floor of any proposed structure in the reclaimed area
be elevated higher than the base flood plus two feet and the 100 year ultimate condition flood
plus one foot. We suggest that this statement be included in the approval report so that there
is no confusion about future development.
Article 4C-2(b) requires that the existing and fully developed 100-year floodplain be
delineated. The subject report only delineated the existing 100-year.
Article 4C-2(c) requires that flood storage loss data be provided so that the City may evaluate
its impact, this has not been provided in the subject report.
o
Article 4C-2(e) requires that Flood levels caused by the development plus any anticipated
future developments must be less than the 100-year ultimate flood level and the 1980 FIS base
flood elevation plus one foot. A table showing this comparison should be provided with the
report.
Article 4C-2(g) requires that evidence be submitted showing that appropriate permits have
been obtained or coordinated. Evidence of coordination for a Corps of Engineers Section 404
permit is required before this project can be submitted to FEMA.
Article 5B-1-2 requires that any report of this nature should be sealed by a Registered
Professional Engineer. To satisfy this requirement Mr. Parche' should seal the report.
Building client relationships since 1967
Mr. Russell Doyle
Page Two
March 28, 1989
In addition to the specific requirements above, the report should address any impacts of the proposed
reclamation such as erosion, flood levels, and other impacts not just for the 100-year existing
condition, but the other frequencies mentioned above. In preparation of any response, Mr. Parche'
should specifically address any differences between the existing condition model in this report and
the existing conditions model presented.
Let us know if you have any questions or comments.
Sincerely,
KIMLI~-Y-HORN AND ASSOCIATES, INC.
l~onald W. Morrison, P.E.
dd
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