SW6220601_Design Calculations_20220629 (2)

PIPE DESIGN
PROJECT: MAGNOLIA RIDGE SUBDIVISION
FILE: PIPE 1 STAO+20 BLOSSOM.xlsx
DATE: 4/25/2022 FROM TO
PIPE# 1 STA 0+20 BLOSSOM ENTRANCE
land use: RESIDENTIAL
composite area =1 10.40
C =1 0.332558
Additional Flow = 0 cfs
Enter storm event
Enter 010 or Q25 Q10 SAND soil type:
Tc = 30 minutes; caculate from Fig. 8.03a, use 5 minutes minimum
pipe: type pipe: RCP (type RCP or PVC)
pipe n= 0.013 Table 8.05b or bureau of rds or malcolm
pipe slope to calc trial size C31 = �% Length = ft. TIME OF CONCENTRATION - RATIONAL METHOD
channel: type channel: TRI C-COEFF = 0.33
width = 0 ft. must be zero for triangular L = 990
slope = % for receiving ditch SLOPE 2.33
side slope = 3 ft per ft
Kb adjust = 1 frm Fig8.05d(tria use 1) tc = 32.878227 MIN
USE Tc = 30 min
AREA
C
Area x C
Woods
0.03
0.1
0
Road
0.16
0.95
0.152
Sidewalk
0.12
0
Lawn
9.90
0.3
2.97
Bldg
0.34
0.99
0.3366
Residential
0.5
0
Mail Area
0.00
0.9
0
Total
3.4586
Total Area 10.4
C-aver =
0.33
HARNETT COUNTY Pipe full
Storm
1(in/hr) 0-pond
Q - cfs
Qtotal
DIAM - IN
Use Diam
Area - Full
HW-depth - FT
HW/D
Velocity(ft/sec
10 - r
3.84 0
4.35 0
5.08 0
13.3
13.3
19.6
24.0
3.14
3.14
3.14
1.8
0.9
6.5
25- yr
15.0
15.0
20.6
24.0
2.0
1.0
6.8
100- - yr
17.6
17.6
21.8
24.0
2.3
1.2
6.8
1 %
apron: if Q< 3 cfs use 2'x3' apror maintain 2.5 fps min
Cd = 0.60 (0,6 TYP)
L 1.i
PIPE OUTLET STATBIIZATION STRUCTURE
flow conditior free outlet
length apron 12 enter from Fig.8.06a inlet control
width apron downstrean 14
apron width at pipe 6 Ift. comments:USE 6'xl2'Lxl4' WIDE AT END
flow conditior submerged
length apron 12 enter from Fig.8.06b outlet control
width apron downstrea 6.80
apron width at pipe 6.00 ft. or if flared end used same width as outlet
4/25/2022

PIPE DESIGN
PROJECT: MAGNOLIA RIDGE SUBDIVISION
FILE: PIPE 1 STA0+20 BLOSSOM.xlsx
DATE: 3/15/2022 FROM TO
PIPE #�ff2 STA 0+87 BLOSSOM
land use: RESIDENTIAL
composite area
C =r 0.49 6698
Additional Flow = 0 cfs
Enter storm event
Enter Q10 or 025 Q10 SAND soil type:
Tc = 10 minutes; caculate from Fig. 8.03a, use 5 minutes minimum
pipe: type pipe: RCP (type RCP or PVC)
pipe n= 0 0 ° � Table 8.05b or bureau of rds or malcolm
pipe slope to calc trial size C31 = 2.7 % Length = ft. TIME OF CONCENTRATION - RATIONAL METHOD
channel: type channel C-COEFF = 0.49
width =Elfrm
ft. must be zero for triangular L = 340
slope =% for receiving ditch SLOPE 5.3
side slope =ft per ft
Kb adjust= Fig8.05d(tria use 1) tc = 11.663631 MIN
USE Tc = 10 min
AREA
C
Area x C
Woods
0.00
0.1
0
Road
0.10
0.95
0.095
Sidewalk
0.12
0
Lawn
1.55
0.3
0.465
Bldg
0.50
0.99
0.495
Residential
0.5
0
Mail Area
0.00
0.9
0
Total
1.055
Total Area 2.2
C-aver =
0.49
HARNETT COUNTY Pipe full
Storm
1(in/hr) IQ -pond
Q - cfs
Qtotal
DIAM - IN
Use Diam
Area - Full
HW-depth - FT
HW/D
Velocitytt/sec)
10 - r
6.28 0
6.95 0
7.88 0
6.6
6.6
12.6
18.0
1.77
1.77
1.77
1.4
0.9
7.8
25- yr
7.3
7.3
13.0
18.0
1.5
1.0
I1.0
100- - yr
8.3
8.3
13.7
18.0
1.7
1.1
9.0
PIPE SIZE INCHES 1 241 RCP 1 2.7 % I Cd = 0.60 (0,6 TYP)
apron: if Q< 3 cfs use 2'x3' apror maintain 2.5
PIPE OUTLET STATBIIZATION STRUCTURE
flow conditior free outlet
length apron 10 enter from Fig.8.06a inlet control
width apron downstrea 12
apron width at pipe 6 ft. comments:USE 6'x10'Lxl2' WIDE AT END
flow conditior submerged
length apron 0 enter from Fig.8.06b outlet control
width apron downstrea 2.00
apron width at pipe 6.00 ft. or if flared end used same width as outlet
4/25/2022

PIPE DESIGN
PROJECT: MAGNOLIA RIDGE SUBDIVISION
FILE: PIPE 3 STA 6+84 BLOSSOM.xlsx
DATE: 3/15/2022 FROM TO
PIPE # 3 STA 6+84 BLOSSOM
land use: RESIDENTIAL
composite area
C =1 0.497514
Additional Flow = 0 cfs
AREA
C
Area x C
Woods
0.00
0.1
0
Road
0.07
0.95
0.0665
Sidewalk
0.12
0
Lawn
1.26
0.3
0.378
Bldg
0.48
0.95
0.456
Residential
0.5
0
Mail Area
0.00
0.9
0
Total
0.9005
Total Area 1.8
C-aver =
0.60
Enter storm event
Enter 010 or Q25 Q10 SAND soil type:
Tc =minutes; caculate from Fig. 8.03a, use 5 minutes minimum
pipe: type pipe: RCP (type RCP or PVC)
pipe n= 0.013 Table 8.05b or bureau of rds or malcolm
pipe slope to calc trial size C31 = % Length = ft.
TIME OF CONCENTRATION - RATIONAL METHOD
channel: type channel: TRI
C-COEFF =
0.50
width =
0
ft. must be zero for triangular
L =
614
slope =
% for receiving ditch
SLOPE
4.8
side slope =
3
ft per ft
Kb adjust =
1
frm Fig8.05d(tria use 1)
tc =
16.013792 MIN
USE Tc =
10 min
HARNETT COUNTY
Pipe full
(Storm
11 fin/hr) Q-Dond
IQ - cfs
IQtolaI
IDIAM - IN
I Use Diam IArea
- Full
HW-depth - FT
IHV
r 6.28
yr 6.95
)- - yr 7.88
apron: if Q< 3 cfs use
0 1 5.71 5.7
01 6.31 6.3
01 7.11 7.1
apror
1 %
18.3 1.77
18.0 1.77
18.3 1.77
Cd = 0.60 (0,6 TYP)
( 11
PIPE OUTLET STATBIIZATION STRUCTURE
flow conditior free outlet
length apron 10 enter from Fig.8.06a inlet control
width apron downstrean 12
apron width at pipe 6 Ift. comments:USE 6'x10'Lx12' WIDE AT END
flow conditior submerged
length apron 0 enter from Fig.8.06b outlet control
width apron downstrea 2.00
apron width at pipe 6.00 ft. or if flared end used same width as outlet
i
0.0
4/25/2022

PIPE DESIGN
PROJECT: MAGNOLIA RIDGE SUBDIVISION
FILE: PIPE 4 STA 10+67 WHISTERIA.xlsx
DATE: 4/11/2022 FROM TO
PIPE # STA 10+67 WHISTERIA
land use: RESIDENTIAL
composite area = 4.36
C =1 OA83257
Additional Flow = 0 cfs
Enter storm event
Enter Q10 or Q25 Q10 SAND soil type:
Tc = 10 minutes; caculate from Fig. 8.03a, use 5 minutes minimum
pipe: type pipe: RCP (type RCP or PVC)
pipe n= 0.013 Table 8.05b or bureau of rds or malcolm
AREA
C
Area x C
Woods
0.00
0.1
0
Road
0.38
0.95
0.361
Sidewalk
0.12
0
Lawn
3.18
0.3
0.954
Bldg
0.83
0.99
0.792
Residential
0.5
0
Mail Area
0.00
0.9
0
Total
2.107
Total Area 4.4
C-aver =
0.48
pipe slope to calc trial size C31 = �%
Length = ft.
TIME OF CONCENTRATION - RATIONAL METHOD
channel: type channel: TRI
C-COEFF =
0.48
width =
0
ft, must be zero for triangular
L =
614
slope =
% for receiving ditch
SLOPE
4.8
side slope =
3
ft per ft
Kb adjust =
1
frm Fig8.05d(tria use 1)
tc =
16.392734 MIN
USE Tc =
10 min
HARNETT COUNTY
Pipe full
Storm
1(in/hrl Q-aond
Q - cfs
Qtotal
DIAM - IN
Use Diam
Area - Full
HW-depth - FT
H4
10 - yr
6.28 0
25- yr
6.95 0
100- - yr
7.88 0
USE PIPE SIZE INCHES
24
RCP
apron: if Q< 3 cfs use 2'x3' apror
13.17.2 24.0 3.
14.61 17.9 24.4.0 3.
16.6 18.7 24.0 3.
2 %
fps min
Cd = 0.60 (0,6 TYP)
� 11
PIPE OUTLET STATBIIZATION STRUCTURE
flow conditior free outlet
length apron 10 enter from Fig.8.06a inlet control
width apron downstrea 12
apron width at pipe 6 ft. comments:USE 6'xl 0'Lx12'WIDE AT END
flow conditior submerged
length apron 0 enter from Fig.8.06b outlet control
width apron downstrea 2.00
apron width at pipe 6.00 ft. or if flared end used same width as outlet
.01 8. 27
1.01 8.5151
0.0
4/25/2022

PIPE DESIGN
PROJECT: MAGNOLIA RIDGE SUBDIVISION
FILE: PIPE 5 CUL DE SAC.xisx
DATE: 4/11/2022 FROM TO
PIPE # 5 ! BLOSSOM CUL DE SAC
land use: RESIDENTIAL
composite area =1 12.37
C = 1 0.472433
Additional Flow = 0 cfs
Enter storm event
Enter Q10 or Q25 010 SAND soil type:
Tc = 15 minutes; caculate from Fig. 8.03a, use 5 minutes minimum
pipe: type pipe: RCP (type RCP or PVC)
pipe n= r• ^ Table 8.05b or bureau of rds or malcolm
pipe slope to calc trial size C31 = 5.6 % Length = ft. TIME OF CONCENTRATION - RATIONAL METHOD
channel: type channel: C-COEFF = 0.47
width = 0 ft. must be zero for triangular L = 1485
slope = % for receiving ditch SLOPE 4
side slope = 3 ft per ft
Kb adjust = 1 frm Fi 8.05d(tria use 1) tc = 27.549633 MIN
USE Tc = 15 min
AREA
C
Area x C
Woods
0.00
0.1
0
Road
0.84
0.95
0.798
Sidewalk
0.12
0
Lawn
9.23
0.3
2.769
Bldg
2.30
0.99
2.277
Residential
0.5
0
Mail Area
0.00
0.9
0
Total
5.844
Total Area 12.4
C-aver =
0.47
HARNETT COUNTY Pipe full
Storm
I In/hr O- and
O - cfs
Qtotal
DIAM - IN
Use Diam
Area - Full
HW-de th - FT
HW/D
Velocityft/sec
10 - r
5.3 0
5.88 0
6.62 0
31.0
31.0
19.5
30.0
4.91
4.91
4.91
3.0
1.2
14.70
25- yr
34.4
34.4
20.3
30.0
3.4
1.3
15.20
100- - yr
38.7
38.7
21.2
30.0
3.9
1.6
1521
PIPE SIZE INCHES
5.6 %
apron: if Q< 3 cfs use 2'xT apron maintain 2.5 fps min
Cd = 0.60 (0,6 TYP)
� 11
PIPE OUTLET STATBIIZATION STRUCTURE
flow condition free outlet
length apron = 20 enter from Fig.8.06a inlet control
width apron downstream 22.5 _
apron width at pipe 7.5 ft. comments:USE 7.5'x20'Lx2T WIDE AT END
flow condition submerged
length apron = 0 enter from Fig.8.06b outlet control
width apron downstream2.50
apron width at pipe = ft. or if flared end used same width as outlet
0.0
10/25/2022