DR9305-CS 930129P.O. Box 478
Coppell, Texas 75019
214-462-0022
January 29, 1993
Mr. Neal Chisholm, P.E.
Graham Associates, Inc.
Centerpoint Two
616 Six Flags Dr., #400
Arlington, TX 76011
Re: Proposed Grapevine Springs Park/Dallas County - Erosion Control Project
Dear Mr. Chisholm:
I have reviewed the HEC-2 models and drawings you submitted in support of the above-referenced
proposed erosion control measures for the Grapevine Springs Park (the Park). You have provided a split
flow analysis for a portion of Grapevine Creek crossing the Park from Section 4.5 through Section 6.0
using 10 year and 100 year FEMA discharges.
As a result of this project, the referenced section of Grapevine Creek has more data resulting from
surveyed crpss-sections, both along the main stream and the by-pass channel. The proposed erosion
control measures are mainly along the by-pass channel, for restoration of the Park. The existing and
proposed 100-ye,~u' floodplain lines and floodway must be delineated on the ~rol~osed~
Please address this comment in your final submittal.
Based on my review, and our discussions through the review process, we have no objections to your
proposed Plan. Please provide two (2) sets of the flood study report along with necessary plans and the
FEM'~, ~ertification form for LOMR in support of the proposed Park reclamation project. I will then
forward a transmittal letter along with a copy of your flood study report to FEMA, with our
recommendation of approval. Please note that according to the attached memorandum from Dallas
County dated November 20, 1992, Graham Associates, Inc. is to follow up with the Corps of Engineers
for wet land determination and issuance of the 404 permit, if applicable.
If you have any questions, please call me at (214) 393-1016.
xc: Ken Griffin, P.E., City Engineer
Rick Wieland, Parks & Recreation Manager
v-~J~k Hedge, Dallas County
Jeff Williams, Graham & Associates
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A Beautiful Future
PO Box 478
Cappell. Texas 75019
214-462-0022
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January 29, 1993
Mr. Neal Chisholm, P .E.
Graham Associates, Inc.
Centerpoint Two
616 Six Flags Dr., #400
Arlington, TX 76011
Re: Proposed Grapevine Springs Park/Dallas County - Erosion Control Project
Dear Mr. Chisholm:
I have reviewed the HEC-2 models and drawings you submitted in support of the above-referenced
proposed erosion control measures for the Grapevine Springs Park (the Park). You have provided a split
flow analysis for a portion of Grapevine Creek crossing the Park from Section 4.5 through Section 6.0
using 10 year and 100 year FEMA discharges.
As a result of this project, the referenced section of Grapevine Creek has more data resulting from
surveyed cross-sections, both along the main stream and the by-pass channel. The proposed erosion
control measures are mainly along the by-pass channel, for restoration of the Park. The existing and
proposed l00-year floodplain lines and floodway must be delineated on the proposed grading plans.
Please address this comment in your final submittal.
Based on my review, and our discussions through the review process, we have no objections to your
proposed plan. Please provide two (2) sets of the flood study report along with necessary plans and the
FEMA certification form for LOMR in support of the proposed Park reclamation project. I will then
forward a transmittal letter along with a copy of your flood study report to FEMA, with our
recommendation of approval. Please note that according to the attached memorandum from Dallas
County dated November 20, 1992, Graham Associates, Inc. is to follow up with the Corps of Engineers
for wet land determination and issuance of the 404 permit, if applicable.
If you have any questions, please call me at (214) 393-1016.
Sincerely,
xc: Ken Griffm, P.E., City Engineer
Rick Wieland, Parks & Recreation Manager
Jack Hedge, Dallas County
Jeff Williams, Graham & Associates
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DALLAS COUNTY
PUBLIC WORKS
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November 20, 1992
MEMORANDUM
TO: Rick Loessberg, Planning/Development Coordinator
FROM: Jack D. Hedge, Manager, Civil Design Section
THROUGH: T. R. Kennedy, P.E., Assistant Director, Engineering & Constructio
THROUGH: Allen Bud Beene, P.E., Director of Public works_
RE: Meeting on 18 November 1992; 2:30 p.m.
Grapevine Springs Open Space (Project 490-485)
1. In attendance:
Rick Loessberg, Planning/Development Coordinator
Jeff Williams, P.E., Graham & Associates
Ken Griffin, P.E., City Engineer, City of Coppell
Mike Sharp, Superintendent, Road & Bridge District No. 4
Jack D. Hedge, P.E., Manager, Civil Design Section, Public Works
2. Listed below are the main points covered and agreements reached at the captioned
meeting:
a. Jeff Williams stated that the final report would state that the proposed
work would result in a 0.01 foot increase in 100 year flood elevation at
the first foot bridge and a 0.01 foot decrease at the confluence of the
main and bypass channels. This increase at the bridge is totally
contained within Dallas County property (the park).
b. Given a. (above), Ken Griffin indicated that probably the City of Coppell
and FEMA would agree to the proposed work.
c. Both Coppell and FEMA will require that any excess excavation be
removed from the site instead of using it to raise the elevation of the
island.
411 Elm Street
Dallas, Texas 75202
653-7151
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Rick Loessberg
November 20, 1992
Page Two
d. Graham's final report will contain horizontal and vertical geometries and
estimated cut and fill volumes.
e. Dallas County Public Works Department will stake alignments and
backslope/frontslope points to insure that construction matches the
proposal.
f. Graham will give final report to City of Coppell (with Copy to Dallas
Count,,). City will submit letter of support to FEMA with request for
approval of proposed work.
g. Graham will proceed to completion of the report and will prepare the
"Section 404" letter to the Corps of Engineers.
3. Please call if you have questions, corrections or additions.
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Jack D. Hedge, P.E.
LManager, Civil Design Section
JDH:rem
cc: Mike Sharp, Superintendent, Road & Bridge District No. 1
.Jeff Williams, P.E., Graham and Associates
v'.1<en Griffin, P.E., City Engineer, City of Coppell
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