ST9801-CS000427Sent by: FREESE & NZCHOLS 2149202565
I
04/27/00 1.~[~4AM
Job 314
Page 2/4
FREESE "' NICHOLS
I',,,NX).
1 ~96- I
Memorandum
TO:
FR C) M:
SUBJEC'.T:
I')ATE:
Kent Coil ins, P.E.
City o f (':opine II
Kcvin Yotm~/"'/"" ~,..~)
C oppell Road Improvemen ts
April 27, 200)
Attached m'e two flow depth scenm'ios fbr the channel at Wes uninster Way. 2-year arKl 5--year l]ows were
determined using the same hydrograph methodology ~md TP-40 raintid l data used lo coralrote the 100-year
prqjcct design flow at the box culverts crossing Coppell Road. The flow deplh analysis assumes tmili>rn~
channel flow.
- END -
FI~,EES[': AND NIC:t t()I2,; · l'701 N. MARKET STREET, SUITI'i 5(.)() LB 51 · DALI./,,S. 'fI.i. XAS 7521)2..200 1
TE[.t.!PIIC)NE: 21,1-.920-2500 · FAX: 214 92{).25fi5
Sent by:
FREESE
& NICHOLS
214.~02565 04/27/00 1,e,~5AM
2-year Flow Depth
Cross Section for Trapezoidal Channel
Project Description
Worksheet
Flow Elemenl
Method
Solve For
Trapezoidal ChannE
Trapezoidal Chanm
Manning's Formula
Channel Depth
Section Data
Mannings Cosflit 0.040
Slope 005000 ft/fl
Depth 5.04 ft
Left Side Slope 3.00 H: V
Right Side Slope 3.00 H: V
Bottom Width 10,00 ft
Discharge 695.00 cfs
Job 31 4
Page
3/4
5.04 fl
· ' 10.00 ft ..... 4
V:I i"""',,,
H :1
NTS
n :'~copf) ell .trn2
04/27/00 10;O8:12 AM
~T~ Haestad Methods, Inc.
Freese and NIchols, Inc,
37 Brookside Road Walerbury, CT 06708 USA
Projeut Fngino~f: Jeff Grourll
FlowMasler v6.0 {614b
(203) 755-1666 Pa.qe I of 1
Sent by:
FREESE & NICHOLS
2149202565 04/27/00 1 ~5AM
I
5-year Flow Depth
Cross Section for Trapezoidal Channel
Job 314
Page 4/4
Proiect Description
Worksheet Trapezoidal Chann~
Flow Elemer~t TrapezoK~al Chanm
Method Manning's Formula
Solve For Channel Depth
Secl~on Dala
Mannings Coerlic 0.040
Slope 005000 lt/ft
Depth 6.20 ft
Left Side Slope 3.00 H: V
Right Side Slope 3.00 H: V
Bottom Width 10.00 ~
Discharge 1,096.00 cls
-.....10.00 fi .....-,~
6.20 ft
H:I
NTS
n :\coppell .frn2
04/27/00 10:25:25 AM
~ Haestad Methods, Inc.
Freese and Nichols,
37 Breokside Road Waterbury, CT 0670B USA
Prc.}jecl Engineer: Jeff G~'ouncI
FlowMaster v6.0 1614b]
(203) 755-1666 Page I of '1