ST8402-CS 880205GINN, INC.
CONSULTING ENGINEERS
February 5, 1988
Mr. Phil Deaton, P.E.
Dannenbaum Engineering Corp.
7950 Elmbrook Drive, Suite 250
Dallas, TX 75247
Re'
Denton Tap Road Bridge Improvement
at Denton Creek, Coppell, TX
Dear Mr. Deaton:
Enclosed please find a copy of correspondence we have received
concerning the above referenced subject as it relates to FEMA.
Please take these items into consideration in your bridge design
and hydrologic/hydraulic study for Denton Creek and accommodate
FEMA and the City of Coppell Floodplain Ordinance as required.
Please call if you should have any questions.
Sincerely,
Kevin Peiffer-
KP/dsp
cc:
Rodney Zielke, P.E., Lichliter/Jameson & Assoc., Inc.
Shohre Daneshmand, City of Coppell
Carl Anderson, P.E., Kimley-Horn & Assoc., Inc.
H. Wayne Ginn, P.E.
John Karlsruher, P.E.
File 241-044
File 335
Lichliter /Jame$on & Associa:e$. Inc.
January 11, 1988
Mr. Kevin Pfifer
Ginn Inc.
17103 Preston Road
Suite 100
Dallas. TX 75248
Dear Kevin:
As we discussed on January 4, I am sending you a copy of the FEMA LOMR for
the proposed floodplain fill project aJong Denton Creek immediately upstream of
Denton Tap Road in Coppell, Tex~s wfth FEMA's concern for the proposed
stream velocity at section 32305 highlighted. This I~-'tion is located just
upstream of Denton Tap Road,
We understand the improvement of the Denton Tap Road bridge is presently
being designed for the City. In your process of r~viewing these plans, w-e WOuld
like to remind you to confirm lflat FEMA's concerns as stated in the LOMR
enclosed are addressed.
Ve,'y *.,;.j!), yours
Rodney E: Ziel~e, P.E.
Project Manager
REZ/'rnmg
Enc
cc: Shohree ganeshmand, City of Coppell
File: 715-0'100-?
The Honorable Lou Duggan
Mayor of ~he City of Coppell
P.O. Box 478
top,ell, Texas 75019
· ' ', '" ' '" ~,~.- ;'!..
Federal Emergency Management Agency
,'~" I ;' ,,i,-~,,.4 '
Washin~on, D.C. 20472
December 11.. 1986 BRC:'''''~'' "[" .....'
C'.~a'. '~' ".. ...;: .
Case 186-06-113R"
gear Mayor Duggan:
Th/s is An reference ~o · letter, dated February 2S, 1986, and techn/c&l
eubnitted by Hr. Ed Powell, P.e., t~y Engineer for the City of Coppell.
his letter, which was forwarSe8 ~o us by our ~"~o~ ...... In
r ..... ..~ .~ ........ ~ v& oxzAce, ItT. Powell
,, ~.~eu noaeAs aha re~zsea mp ~.te the ~o~ mle ~ fill proJec~ in~o ,
~no~er proceed proJe~, ~ren~y ~er ~~~, 1~ i~diatelv ,
ao~o~e~ In ~ area ~ ~ ~e ~y ~t ~ +~ ~- -- -- ~' ---/
1985 for ~e ~my ~lo~ent ~e~. ~~~~p~r 3~
We reviewed ~he da~a .uhmAt~ed by Hr. Pc~ell add ~. ~ ~ ~ de- ~
· e~n~ ~ ~e ~o~ Mle ~M~c~ ~ ~1 ~j~ Me~ ~e
s~ce ~n (~} r~a~o~. ~ ~ ~ wre ~ple~ an ~o~.
· l~vay ~p (Y~), ~ Pl~ ~M ~ ~ (~), for ~ur ~~
b~daries ~ ~se (l~ar) FI~ ~~ (~) ~ c~ In ~e
re~s~ ~-2 m~els S~~ ~ ~y 9, 1~, ~ ~. ~. Plebe note
that fg~e r~slo~ ~ ~e ~S, ~, ~ ~ br ~ ~ of Co~ll or
ru~u of ~e fl~ ~a~s ~ ~ ant ~ ~ ~s ~ce~m~on.
~ m ~e ~gh nl~.in ~e ~ ~ ~ ~, Ul.~t~n. ."
tnt ~ e~t~el ~ ~ 'fl~y ~ at ~ ~~ ~t ~ ~1~ ~ ...
.eff~ l~. . '.. .'- ' - ' - .:. ·
The deterntne~ion sade in this letter is based on ~h' 100-¥'ar f&ood d~
cher~eo c~pu~ Ln ~e effe:~ve
~-~n~ o~ ~Xs pro~ec~ and o~her
zncre,,, fl~ ~,charge,. ~zch.
cha~O ~e z~to acco~ ~e c~uXa~ve effe~s of develo~ent on ,
~es, e~d es~sh hXghe= l~vea=
~n~J.tsne~ ~tncler ~-~e NFZP. ~our c-- ..... '
~nunlt¥ Is res nsib
~o~s~ fl~plaLn develo~ents_ /nc~.~ ..... ~ le for Ipprovinq
~,0+. -~ _~_ ~_ --~_~-~ by F~eral or Sta~e lay have ~en r,~.~.~ -
· ~e Interest of sato~ ............. = - ~i CO~ltlO~O
. ~l~p~a~n areas. ~-.o.~ o~ ~ Or ~' CX~
~ZP.r~a~on 44'~ ~.3(b}(TJ'~--- ""' ' '[ '~' '' '. ' "'
.. . . . . . -,~m~~,~'' . ....
: .. · . . ~ . .
' . - .... m~ ~ ~'~ · .~. .. . . -- · -.
· ~ . . . '~ .W~ ~ ~ .... . ., ·
.... ---.s~ ~ ~, ~, ~ ~ ~ ~ .........
~pr~ect, w r~re ~4. ..... l._ · ~ ~f~ of ~e
-~ a ..... -.. -M~ment ~at ~r ~~ ~11 upholdj
=es~~X~y for mossing ~at ~e ~el ~s na~n~n~ ~n or, er ~ prese~e
Upon couplet=ion of the ~roposed swale constrnctlon ud £&11 project, your
coumu~Lry may request · revision to the ef£ec~tv~ FXS. FBi,. and F33Ul. The
revision request must include ~be data Ltetad blow. by, re! of these &tuns
have ~lrendy been submitted by Nr. II~ber~s, but nay need ~o be revised ~n4 =m-
m~'~mJLtted to lncorpcrate &ny changes reoult.~ng from the ~ent. ioned concern
"~ &ny design changes ~=hat ~ny t~ke p~ace d~Lring co~l~tFuct=ton. ~
1. MTttten endorsement o£ t. be zwv~sion request; · w~l~ell statement
concerntnq naintena.-.ce of ~he prc~ect, as descrZbed above; and
docunen~a~on denon~r·t~ng that the above=Bent=toned concern has been
resolved.
"~n-but2t' p2afls o£ the mmle co~r. ruct. ton and 'fll~ pro~ect, cert. i£1ed
· by · registered engineer. ..
KIC-2 hydraulic .models o~ tau 10-, SO~, 100-, ~ ~ar fl~m
a~rmn~on~ concern ~1~. " ' "' '
4~
ge~ineat_ion of the ~00- a~l SOO-Fear flood bound&~eo, the r:loodwey
boundarF, and t. he ~oc&tious ~ Lt~gnnen~ of cross eec~ons and
£1ov~ne used in the hydraulic node! representing "&o-bu~l~" con-
dL ~tons.
Revised water-surface profLle$ of the 10-, SO-
floods reflec~/ng 'as-built' c~(-~ ..... :. 00-, and 500-year
na~on. ~---~n~, znc~ua~ng & zone determt-
cc: fir. Bd PovellL, P.E.
Mr. Nark '* Robe--"~l, PoE.
SJ.ncerely, ' '
Acti~ C~le~, Risk St2dieo Division
Federal Insurance Administration