SW6211002_Design Calculations (Riprap)_20220810

PROJECT NAME
1649 B&B LOOP
LOCATION
Raeford, North Carolina
Storm Outlet Structure
FES No.=
TSB #1 SKIMMER
Pipe Dia=
2 in
Q10 =
0.06 cfs
Qfull =
0.06 cfs
Vfull =
1.73 fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
s
Length
Storm Outlet Structure
FES No.=
PO 16
Pipe Dia=
15
in
Q10 =
3.14
cfs
Qfull =
8.01
cfs
Vfull =
6.52
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
s
v 3
Length
Zone
D50
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
Zone
D50
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
DATE
DESIGN PHASE
11-02-21
PRELIM
PROJECT NO
CONSTR
1649
REVISION
RECORD
BY
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Q10/Qfull = 1.00
V/Vfu I = 1.14
V = 2.0 fps
= 1
= 4 in
= 6 in
= A
= 9 in
= 0.8 ft
= 0.575 ft
= 1.0 ft
Q10/Qfull = 0.39
V/Vfull = 0.93
V = 6.1 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 7.5 ft
= 3.75 ft
= 8.8 ft
1649 Storm.xlsx LATEST REVISION: 12/1/2021 6:56 AM PAGE 1 OF 3

PROJECT NAME
1649 B&B LOOP
LOCATION
Raeford, North Carolina
Storm Outlet Structure
FES No.=
PO 12
Pipe Dia=
18
in
Q10 =
2.48
cfs
Qfull =
10.48
cfs
Vfull =
5.92
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Storm Outlet Structure
FES No.=
PO 13
Pipe Dia=
18
in
Q10 =
1.14
cfs
Qfull =
9.02
cfs
Vfull =
5.10
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
s
Length
Zone
D5o
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
Zone
D5o
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
DATE
DESIGN PHASE
PRELIM
11-02-21
PROJECT NO
CONSTR
1649
REVISION
RECORD
BY
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Q1 o/Qfu I = 0.24
V/Vfu 11 = 0.81
V = 4.8 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 9.0 ft
= 4.5 ft
= 10.5 ft
Q1 o/Qfu I = 0.13
V/Vfu11 = 0.68
V = 3.5 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 9.0 ft
= 4.5 ft
= 10.5 ft
1649 Storm.xlsx LATEST REVISION: 12/1/2021 6:56 AM PAGE 2 OF 3

PROJECT NAME
1649 B&B LOOP
LOCATION
Raeford, North Carolina
Storm Outlet Structure
FES No.=
PO 14
Pipe Dia=
18
in
Q10 =
2.37
cfs
Qfull =
10.60
cfs
Vfull =
5.99
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Storm Outlet Structure
FES No.=
PO 15
Pipe Dia=
15
in
Q10 =
1.42
cfs
Qfull =
8.04
cfs
Vfull =
6.54
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
s
Length
Zone
D5o
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
Zone
D5o
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
DATE
DESIGN PHASE
PRELIM
11-02-21
PROJECT NO
CONSTR
1649
REVISION
RECORD
BY
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Q1 o/Qfu I = 0.22
V/Vfu11 = 0.78
V = 4.7 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 9.0 ft
= 4.5 ft
= 10.5 ft
Q1 o/Qfu I = 0.18
V/Vfu11 = 0.75
V = 4.9 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 7.5 ft
= 3.75 ft
= 8.8 ft
1649 Storm.xlsx LATEST REVISION: 12/1/2021 6:56 AM PAGE 3 OF 3