FIRM-901120Dewberry @Davis METS ID :70:, -849 -0648
GINN, INC.[�'
20190%
November 20, 3_990
SEP 14'92 11:04 No.002 P.02
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.`11NG ENGINEERS
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Mr. Matthew Miller, P.E.
Risk Studies Division
Federal Insurance Administration
Federal Emergency Management Agency
500 C Street, SW
Washington, D.C. 20472 '
Re: Denton Tap Fl.00dplain Revision Case No. 88- 06 -13R
Dear Mr. Miller:
On September 23, 1487, Mr. Wayne Ginn, P.E., acting as City
Engineer for the City of Coppell, Texas, submitted a request for
a Conditional Letter o Map Revision for Denton Tap Road bridge
replacement. Accompanying this request was a report entitled
Eloodplain Hydrgtt �c,s Study, Grapevi Coppell, Texas,
dated September 22, 19A7, prepared by Kimley -Horn and Associates,
Inc. This Conditional Request was approved by letter of March 4,
1988, and Constructiontbegan. -
We have new completed construction of the bridge and respectfully
request that FFMA now issue a final Letter of Map Revision as per
National Flood insurance Program Regulations. In support of this
request we have attached a study entitled Flogo pla j�d 3 �s
study, Grapev.illp C.ree:k, Coppell, study 0f— PA -YAQll
Tan Rgad lKidge Replagement.
We will be happy to provide any additional information as
required, or you may contact Mr. Ron Morrison of Kimley -Horn and
Associates for further information regarding the report.
sincerely,
e��4 •.t'�^f'
John C. Karlsruher, 1'.E.
cc: Shohre Daneshmand, P.E.
H. Wayne Ginn, PI.E.
File 378
/�� C y !• / V r� [
17103 Preston Ittial • Suilc 100 • LH 118 0 Dallm, Tcxns 75249 0 1'1►anc 214/248 -4900
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Dewberry Havis METS
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ID :70--)-849-0648 SEP 14'92 11:05 No .002 P.03
Federal Emergency May)agernerlt. Agency
Wa%hington, T.).0 20472
AN 3 !991
1,111, 11- 110rabI U Marl: Woi f.-e
mio' - of the City of coppell
P,61 Rox 478
Col` "ail, Te-\as 75019
I),'`i1 Mayor l.,olfe:
IN REPLY REFER TO.
(65 -DR2)
Case No.: 6 -91 -31
Community: City of Coppell. ,
Dallas and Denton
Counties, Texas
Community No.: 480170
Th1,, is in reference to a request for a revision to the Flood Insurance Study
art`k National Flood Insurance Program maps for your community. Information
P(" I luent to L-his revision request is listed below:
Requestor: Mr-. John C. Karlsruher, P.E., Ginn, Inc,
Flooding, source(s), grapevine Creek
Project name or area of revision: Denton Tap Road Bridge replacement
Map Fanel(s) affected: Flood Insurance Rrit.e Map Number 480170,
panel 0005
Oki) ItiVevious letter to you indicated that additional infarmation might be
rvgk\Zred to complete our evaluation of the request. We have reviewed the data
stttL,,; ,
L.t-ed and have determined that additional and /or revised data are required
to ` 0mPIRCp our evaluati-nn. `i'he enclosed list outlines the information
red. A represenr_at.i.ve of Pnwh(trry & Davis, our technical evaluation
ec�tl, ~'actor., will. be calling the requc_stor. Co discuss the required information.
"rl"' information speCificd 011 the enclosed list should be provided by the
rc,;� �'stol- within 30 days of tha date of this ler.ter to the following address:
- DCwhC:r)-y & Davis
8401 Arlington Boulevard
Fairfax, Vi.rt, ini.a 29.031
A'i "IENTION Ms. Pat.iicia W. I- IvD_rmott, 1'.E,
Managemes-it: F.ngi nc-eri ng and
Technical. Services Division
(703) 849 -0245
Dewberry Havis METS
2
ID:703 -849 -0648
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SEP 14'92 11:05 No.002 P.04
why case number referenced above should be Included on an further corre-
y
spondence regarding this request. Our review cannot proceed until the
require] additional data are received. After receiving the data, we will
continue our evaluation of the request. If additional information is required
to complete our evaluation, we will inform you.
Should you have any questions or if additional time in. required to provide the
required data, please contract Matthew B. Miller of my staff at (202) 646 -3461.
Sincerely,
WLo ,gtr V -L'CL'
William R, Locke
Acting Chief, Risk Studies Division
Federal Insurance Administration
Enclosure
cc: Ms. N. Shohre Daneshmand, P.E., Acting City Engineer
Mr. John C. Karl.sruher„ P.E.
Mr. Ronald W. Morrison„ P.E., Kimley -Horn aid Associates, Inc.
Dewberry Havis METS
F -
Ir:703- 849 -064$
T.
`CEP 14'02 11:06 No.002 P.05
«.
Case No-: 6 -91 -31
community: City of Coppell,
Dallas and Drenton
Colinti6is, Toxas
Community No- : 11801.70
ADDITIONAL DATA REQUIRED TO SUPPORT A REVISION TO THE
FLOOD INSURANCE STUDY AND NATIONAL FLOOD INSURANGV PROGRAM MAP
A4 3 1991
Request-or- Mr, John C. Karlsruher, P.E., Ginn, Inc.. Date:
The issues listed below must be addressed in order to procf4ss this revision
request:
1. As stated in the March 4. 1988 conditional I.ar.tnr of Map Revision
issued for this case, Subparagraph 60.3(b)(/) of the National
Flood Insurance Program (NFIP) regulations (copy enclosed)
requires that the City of Coppell rassurt chat. t -he c_hanriel modifi- V
ations associated with the Denton Tj)p Boad bridge rely aceutent be
manta .reed. wi.t:yotxt proper maintenance, such as t7 '_ular
elearinp of a channelized stream channel modificati.on proiec_ts
wi11., in rime, fail to function as deli nod thereby recreating
the. f and axar t at they wcrc intended Lo mitigate. Please
submit assurance that t to nmrnuni y wi �p o its re spansibi 1 i,ty
to maintain the modified channel in order to preserve its dpsitgn
function. Please be aware that the federal Emcn -gency Management
Agency may request that your community submit a dcscri.ption and
schedule_ of the channel maintenance activities_
2. Please submit community endorsement of this revision request from
the City of Coppell in accordance with Paragraph 65.E +(b) of the
NFIP regulations (copy enclosed)_
3- I'leasa submit "His- built" certification by a registered Profes-
si.onal. Engineer of the bridge plans entitled Denton Tap Road
I1110r.ovemenLs. Grayevine Creek,_.,F3.ridPr I. q uC, dared October 1987,
prepared by Ginn, Inc_