HomeMy WebLinkAboutSDP200400087 Calculations Minor Amendment 2004-11-2971-1�L
152Ac.
J. 57/4,
NOV 19,9 2004
COMMUNRY DEVELOPivEMT
STORMWATER DRAIN DESIGN COMPUTATIONS
PROJECT: SHOPPERS'WOPLD
DATE: 11/29/2004
All Pipes are RCP (n-20.013) unless othemise noted,
DESIGNER: Terra Partners - AGF
FROM TO
D.A.
RUNOFF 0 FF
COEF. CA
INLET
1( '0)
100)
Q(1'
Q(10) V(10)
POINT
TIME
TIME
--
INVERT ELEVATIONS
LENGTH SLOP
LENGTH SLOPE
E
DIA, CAPACITY 1(2)
FLOW TIME
POINT
POINT
AC7RES
ACRES C INC.17N C ACC.*
ACC.IN
-
MIN.
/HR C.F.S.0
IN./HR C�FS. F.P.S.
UPPER--7—L�� �ER
Q(2) V(2)
-TFN
MIN.
(j)T
(1) _
_ t�L
() _
3) (4)
3 (5) (6)
(5) 67)
(7)
(8)
(8) (9)T
___END END FT. %
(101 1 IlTi- -/1-
IN. C.F.S. IN,/HR
C,F.S.
C.F.S.S� F.P.S.
---
C
INC ACC]..
.7
REMARKS
4.64 1 44! 5,00
0.37 0.46
EX 0.44 1 1 : 5.00 � �44M562,00 r2 10-85 6.5 0.4�9=K.4-7
3.15
3.
22 9.48 443.15— 442.65 10.06-- '-K-05 i-5-7
0
9 8
----+--14.44 5.4 2=4 9 �.51
0.67
15
0,0
Time of Concentration Worksheet
AREA B
Overland Flow Time
Source: Seelye Chart as modified in VDOT Drainage Manual (Fig. 1.5.1.1 on Page 1-13E)
Notes:
1) Length of overland flow always <= 300 ft
2) Calculate a separate Tc for each ground cover condition along the flow path
200.00 Enter Length of Strip (ft)
10.00 Enter Slope (% or ft/100ft)
0.36 Enter Rational Method "C" value
Sample "C" values:
0.22 Dense grass
0.28 Average grass
8.96 Result Tc (minutes)
0.36 Poor grass
0.48 Bare soil
0.90 Pavement
Shallow Concentrated Flow Time
Source: SCS Velocity Graph as published in Virginia Erosion and Sedim(
Handbook, Third Edition (Plate 5-2 on Page V-12)
Notes:
1) Not intended for well-defined channels - see channel flow calculation
2) Calculate a separate Tc for each ground cover condition along the flow
260.00 Enter Length of Flow (ft)
6—.6-6
j Enter Slope (% or ft/100ft)
1.04 Result Tc (minutes) IF UNPAVED
0.81 Result Tc (minutes) IF PAVED
Channel Flow Time
Source: Kirpich Chart as modified in VDOT Drainage Manual (Fig. 1.5.1.2
Notes:
1) For small drainage basins.
2 For concrete channels, use 0.2*Tc
0.00 1 Enter Length of Flow (ft)
1.00 Enter Height of most remote point along flow path above outlet
0.00 Result Tc (minutes)
Part II - Rainfall Intensity (Albemarle County, Virginia)
Return
I nter
Calculated
Period I
Duration
I Intensity
z
10.0
4.2
5
10.0
5.0
10
10.0
5.7
25
10.0
6.6
50
10.0
7.3
100
10.0
8.0
Control
Page 1-14)
Acceptable values for duration are between 5 and 60 minutes. Use values outside this range at risk.
STORMWATER INLET COMPUTATIONS
POPLAR GLEN
7/29/2004 Rev.11-10-04
Chapter 9 Storm Drains
Appendix 9C-14 1 Performance Curve DI-7 in a Sump
10.
9w*j
M
.-o
Source: 'VD 0 T
C�
OPEN AR—EA-7= --- 6—'-T—
.OF 2
,PERIMETER = 12.8 FT
5 10
DISCHARGE (CFS)
Chapter 9 — Storm
'Drains
Appendix 9C-14 Performance Curve D1.7 in a Sump
------------
10.
M7%
LL
1.0 fr
LU
0
OPEN
EN AREA 6j0 F 2
P A �
PEN AREA 6.0 FT2
IM T
0.1 PERIMETER 12 8 FT
5 10
DISCHARGE (CFS)
Source: VDOT
Chapter 9 - Str,.,,
I;Jl�
Appendix 9C.14 I Performance DI-7 in aiSurnp
LL
10.
5.0
1.0
0.1
Source: --------
VDOT
OPEN kR--E—A-= --- 6--j—
.0 FTz
PERIMETER = 12.8 FT
5 10
DISCHARGE (CFS)
C
FHWA urban
Drai
Project No. .
Project Name.:
Computed by :
Inlets
C1.TXT
Drainage Design Program,
ge of Highway Pavements
Inlets on Sag
Date: 11/29/2004
SHOPPERS` WORLD
Roadway
Cross S1
Sx
Pavement
SW
Gutter C
n
Manning'
W
Gutter In
a
Gutter C
Sag: Curb -Opening Inlet
and Discharge Data
HY-22
wmpusite/Dep
Cross Slope (ft/ft) 0.0450
'oss Slope (ft/ft) 0.0830
Coefficient 0.016
dth (ft) 2.00
pression (inch) 1.00
;Inlet Interception
Inlet Type *Sag*
T Width of'Spread (ft)
L Curb -Opening Length (ft)
H Curb -Opening Height (in)
d_curb Depth atCurb (ft)
Qi Intercepted Flow (cfs)
Page 1
Curb -Opening
4.32
4.00
5.00
0.354
1.500
M
C2.TXT
FHWA urban 'Drainage Design Program,
Drainage of Highway Pavements
Inlets on Sag
Date: 11/29/2004
Project No. ISHOPPERS'S WORLD
Project Name.:
Computed by
Inl
Roa
Sx
Sw
n
W
a
on Sag: Grate Inlet
and Discharge Data
Cross slope
Pavement;Cross Slope (ft/ft)
Gutter Cross slope (ft/ft)
Manning' Coefficient
Gutter width (ft)
Gutter Depression (inch)
Inlet Interception
Inlet
Type *Sages
T
Width
ofISpread
(ft)
WGR
Grate
Width
(ft)
L
d_ave
Grate
Length (ft)
Depth
of'`Flow (ft)
d_curb
Depth
atCurb (ft)
Qi
Intercepted Flow (cfs)
Page 1
HY-22
uniform
0.0500
0.0500
0.016
2.00
0.00
Parallel Bar P-1-7/8
2.42
2.00
2.00
0.071
0.121
0.340
455'
_
55
STORM C2
EX
STORMTAB
STA' 10+10 ClC1
10+72
RIM449.00
50
STA-10+Ob__ _._
RLM'_447__0.0_
INV ; OUT 445.00
RIM 446.8'3
INV, IN 44, .65
NV. IN 443.25
IN 443.15
— _ — — — —
450
INV. OUT442.55
4 f
/
„RCP @ 2.132 0
----
,
62 ELF OF s
445
„
10 LF OF 15"
RCP
@ 5.00%
440
10 LF _
RCP OF 15"_
_ .. ... .. ._..__,.
0
5 00 /o ._. ,._440
10+00 10+90
STORM C PROFILE
SCALE; 1"=30' �I; 3"=5' V
STORM A
STA 1 o+oo
RIM 439.60
INV. IN 435,001(15")
INV. IN 435. 00! (151)
445 l--INV,---IN 435.15 (EX- -1,5"). . -
INV. IN 432.001 (EX. 24")
INV. OUT 431.05 (EX. 24"NORM B
)
STORM D TA 10+24
STA 9+74 RIM 439.00
I RIM 439.00 1 INV. OUT 436,
INV. OUT 4361.25
4401-1 ------ -
435 1
LF OF 1511II
214 LF OF 15"
P @ 5.21%
RCP @ 5,21%
9+70 10+00 10+30
SCALE:
445
435
LP ELEV = 489.44
LPSTA =10 I 05
PVI STA = 16+05
PVI ELEV = 4�9.34
455 i
'A.D.-8;00- -
K = 1,25i
10, vc
wl
450 ! _
>
,
_ _ _ _ .
0
I z
-s
0
445 1
I
Cl
orr
olo
PVI STA = 10+25
PVI ELEV = 440.14
1
A.D.= 5.00- -
6
PVI STAI= 11+10
I
PVI ELEV, = 447.79
A.D. -5.93
K 5
C)l
a- LU
jc?
K�' oO''Lo
Lo
i (N
1q,
Lo
�4-
10+00 10+90
ENTRANCE PROFILE
SCALE: J"=,5U'j-j; 1 " =Y V
455
445
1\6
e r-
K Cern
eL-
1�
Yel�- 6 rep, rc
v.
TERRA
PARTNERS, I,IX
CR7I. ENGINEERS
LANDSCAPE ARCHITECTS
LAND SURVEYORS
2. W, STREET, NE
'FiAR[A TLSVILU Ni GLVIA
22%2
FAX 534-296619'I
SCALE: 11 1=100'
ISSUED: 11-24'-04
DRAWNIIY: AGP
REVISIONS:
SHEET
oI� 1