ST0301-MP080228
5/0"30 I
--
i.>.~~_~
~:,<.-
or,
City of Coppell, Texas
Roadway Design and Tributary G-l LOMR
Kickoff Meeting
---
Freese and Nichols
'f..I[-el"O'"
-
COPPELL
Thursday, February 28, 2008
AGENDA
2:00 pm
I. INTRODUCTION
II. PROJECT OVERVIEW
a. LOMR for Tributary G-l
b. Roadway Design for Bethel and Coppell Roads
c. Future Development
III. LOMR FOR TRIBUTARY G-l
a. Goals
i) Today's Meeting: Gather City staff input and identify expectations
ii) Project: LOMR submittal to FE~ to reflect recent construction activities
b. Scope Review - Appendix A
c. Schedule Review
d. Technical Issues
i) FEMA SubmittaV Coordination
ii) Data needs (See Exhibit) - Drainage Area Maps, Storn1 Sewer, Detention Pond Plans
IV. BETHEL AND COPPELL ROADS
a. Project Status
b. Tributary 0-1 Erosion Concerns
V. FUTURE DEVELOPMENT
a. Dov-mstream Assessment
b. Deliverables
VI. SOUTH COPPELL ROAD IMPROVEMENTS
a. Profile Changes
b. Development East Side
c. Development West Side
d. 90% Plans
VII. BETHEL ROAD. PART I
a. MBGF vs. C203
b. Schedule
CLOSE/ADJOURN
3:00 pm
TRIBUTARY G-l LOMR
Data Needs List
Type of Data
Entity
Previous Studies
I Halff Storm Water Master Plan; Digital Models
I TranSystems Construction Documents
Existin Develo ment (See Exhibit)
! City GIS Data (2ft contours, storm sewer systems)
I
Halff
T ranSystems
City
City
Date
Re uested
2-28-2008
Received
2-28-2008
2-28-2008
..
Freese and Nichols
~nafl()f1al Plaza 511lle lUI'
40551nkf 161094R9!1
h q' \NOd!\, Te'lld5
H!? 13!) /JOO
City of Cappell
Tributary G-1
rN JOU NO
FILl' (~.?J)peIIFTWmx~~
1
<
<
m+z
m
Data Request
DATI'
SCALI'
DESIGNED
DRAHED
Feblllar :l0011
NOT TO SCALE
DCS
Figure
Des
February 21, 2008
/'.1) A
j'i'"
d-Jl.:'.")" ''',.~ .lY'J
I
Iv'> 0-' 1<).
,l "I'~
,'...........r,"'~~ .:, .
""'4' ""'.:> ,-,,',\
F rank Pagan 0
Director. FEMA Mitigation Division
800~. Loop 288
Denton, TX 76209
RE: FEMA Map Modification for the City of Coppell
Tributary G-1
Dear Frank Pagano:
The City ofCoppell (City) has retained the services of Freese and Nichols, Inc. (FNI) to evaluate the
DFIRM floodplain for Tributary G-1 currently a Zone A. FNI compared the new FE!\1A mapping to the
existing FIRM and compared that delineation to recent hydrologic and hydraulic studies provided by the
City. Recent design of Coppell Road and Bethel Road has required developers to determine a 100-year
water surface elevation to reflect proposed changes. These studies were provided to FNT by the City and
were reviewed. It was detennined by FNl that these studies represent the most current hydrologic and
hydraulic infomlation.
Based on the hydraulic models provided, the existing 1 OO-year base flood elevation upstream Bethel Road
\",as 507.19 ft and approximately 504.93 upstream of Coppell Road and 504.23 downstream. FNI
obtained the City current 2-ft contours and delineated the existing 1 OO-year water surface. The
comparison between the three (3) sources, the FIRM, DFIRM and City provided data, is provided in the
attached Figure 1. FNI has also included the effective FIRM for your reference.
FNI has concluded that the recent studies in conjunction with current topography best represent the
existing 1 OO-year floodplain. The City protests the approval ofthis DFIRM and respectively requests a
meeting with a FEMA representative at the earliest convenience to discuss updates and concems with the
new DFIRM. Please contact :Mike Wayts to schedule a meeting at 214-217-2222.
Sincerely.
Mike Wayts. P.E.. C.F.M
Attachments
cc: Keith Marvin, P .E. - City of Coppell
TJJ&H\LeUer to fEM.l\.doc
e
-=-
Freese and Nichols
'-C' N::Htr- tI,'",,.-,e, -==".. St, 5DC._1:'
:'2I;;<lS 'I'c ~B~ .,.:: 2['::.2D[-
,:' ~ '::'''' -:2~'(
Z~~ ,~
r"
- .
S
Zone A Floodplain
r
C
ro
E 2:':
c ::::l
"'0 Cf) ~ .8
~ en ~ 0.. c
Cl> c 0
~ ~ cr u ()
C) 0
Cl> x ::r:: l.L 0 .::=
w l.L 0 l.L I
-I N
01
CJL..JE<2>J
:='Cl:Jpell;:T\i'\'.riXJ
:...TE
re:l~uan.' 20J8
1" 0 308
D::SI::;;N",D
1
D::S
FIGURE
JCS
II I/j
( I /
)'1 // I
'I // !
Iy !
)i~ ~
/ I /
l I,
/,'J / '
/ I
:-,
o
-;
~
1~
/1111
Hf~!
HiH
~~~~~
I!HH,
1_, .. 0 ~ ~I
;;. _ = n ::
I,' -", '2 =
; g ; :-. ~I
1.- c. - "-.
I~~.~ ,n!
:: = :::
~ ~ ~
FRE=POF\i
:;-
00
'"
2;
T
)"
, ,
i
-
\
Ii
'"
\.~
m
'"
.. >
is
? ~Rk'N4 ~.
OZ~
o~m
__0
z6=
c:~~
"'"
......r-c
~~~
"Or.
:~~
;t:>Z~
-lV'lr-
r:-: ,- r-
$'"'0
>;::~
_.::.,..
~nr-
, m;o.
_Y'
c>
"'.,.
""-
0'"
e;;;
~
z
(;)
I~
I
I
I
/
!
I
N _~J
0 m
2: x .~
m
x
'"
~~
c:
~r
;:;:,~
c:::;
c,o
It
/
( 1'1
\E\'"
\ "-
L.,.-.-'(______
---i
I
I'
i
.:oppc., i
N
o
Z
m
~
CD?PELc
I'
'"
>
;;i
rug
II ~.
I -6
I ~
~
~,
..,
~
!
~
1
f
g$
c:: '""'
""c-;l
--i -
",,<
"","'"
-;"'0
=:::
=~
-~~ ..,., -n
Zt=.l> r-
Q~- Q -
o "' Q ::::0
2U)~ Q 3:
O>CU z ~
..... on ~
"" ;;::iZG c: =
- = = =
>t:;jC =
i~~ It; ; ::.
~ ,.... :z: =
~::"" ~ t=j z ~ V>
~ ,.,., =
o -= =
~::;" I~ , :< = "'"
:;:..:; ;::. :z:
> --; ;;;:
;;::i ,.,.,
~ , ..-.J ::: i5
~ > ;::. =
u:: =
".
3:
....3
===
_""0
<:;=
S~
t=;c=
,..,.,
:0
::;. ~r..
n
:0>
r-
m
!
,
U~ r
:5