SW6231112_Design Calculations (Riprap)_20240117

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina Caleb Kernan OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 1 OUT Qio/Qfull = 0.70
Pipe Dia= 30 in V/Vfull = 1.08
Q10= 20.64 cfs V= 6.5 fps
Qfull = 29.32 cfs
Vfull = 5.97 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
III
�•�•�•�•�•� Riprap Class = B
••••••••••• L Apron Thickness = 18 in
�•������•S Apron Length 15.0 ft
�•�•�•�•••••�• Apron Width @ Outlet = 7.5 ft
•• •• •••
Apron Width @ End = 17.5 ft
Length
Storm Outlet Structure
FES No.= PIPE 2 OUT Q1o/Qfull = 0.20
Pipe Dia= 24 in V/Vfull = 0.78
Q10= 9.11 cfs V= 11.2 fps
Qfull = 44.92 cfs
Vfull = 14.28 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D5o = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length 16.0 ft
Apron Width @ Outlet = 6 ft
Apron Width @ End = 18.0 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 1 OF 6

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina Caleb Kernan OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 3 OUT Q1o/Qfull = 0.64
Pipe Dia= 30 in V/Vfull = 1.06
Q10= 19.90 cfs V= 6.6 fps
Qfull = 30.92 cfs
Vfull = 6.29 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length 15.0 ft
Apron Width @ Outlet = 7.5 ft
Apron Width @ End = 17.5 ft
L Length 1
Storm Outlet Structure I
FES No.= PIPE 4 OUT Q1o/Qfull = 0.87
Pipe Dia= 30 in V/Vfull = 1.12
Q10= 27.01 cfs V= 7.1 fps
Qfull = 31.15 cfs
Vfull = 6.34 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D5o = 10 in
DMAX = 15 in
•�•�•�•�•�•�•� Riprap Class = 1
Apron Thickness = 22.5 in
IIIIIII';IIII1J
_Apron Length 20.0 ft
Apron Width @ Outlet = 7.5 ft
Apron Width @ End = 22.5 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 2 OF 6

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina Caleb Kernan OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 5 OUT Q1o/Qfull = 0.12
Pipe Dia= 18 in V/Vfull = 0.67
Q10= 2.42 cfs V= 7.5 fps
Qfull = 19.77 cfs
Vfull = 11.17 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
L Length 1
Storm Outlet Structure
FES No.= PIPE 6 OUT Q1o/Qfull = 0.63
Pipe Dia= 30 in V/Vfull = 1.06
Q10= 19.73 cfs V= 6.7 fps
Qfull = 31.15 cfs
Vfull = 6.34 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length 15.0 ft
Apron Width @ Outlet = 7.5 ft
Apron Width @ End = 17.5 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 3 OF 6

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / X /
LOCATION BY RECORD / X /
Harnett County, North Carolina Caleb Kernan OTHER / X /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 7 OUT Q1o/Qfull = 0.77
Pipe Dia= 36 in V/Vfull = 1.10
Qio= 39.50 cfs V= 8.0 fps
Qfull = 51.46 cfs
Vfull = 7.27 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D5o = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length = 24.0 ft
Apron Width @ Outlet = 9 ft
Apron Width @ End = 27.0 ft
L Length 1
Storm Outlet Structure
FES No.= PIPE 8 OUT Q1o/Qfull = 1.07
Pipe Dia= 18 in V/Vfull = 1.13
Q10= 7.98 cfs V= 4.8 fps
Qfull = 7.43 cfs
Vfull = 4.20 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length = 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 4 OF 6

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / X /
LOCATION BY RECORD / X /
Harnett County, North Carolina Caleb Kernan OTHER / X /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 9 OUT Q1o/Qfull = 0.71
Pipe Dia= 24 in V/Vfull = 1.08
Q10= 12.17 cfs V= 5.9 fps
Qfull = 17.05 cfs
Vfull = 5.42 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length 12.0 ft
Apron Width @ Outlet = 6 ft
Apron Width @ End = 14.0 ft
L Length
Storm Outlet Structure
FES No.= TSB 6 OUT Q1o/Qfull = 0.91
Pipe Dia= 24 in V/Vfull = 1.13
Q10= 22.00 cfs V= 8.7 fps
Qfull = 24.12 cfs
Vfull = 7.67 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D5o = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length 16.0 ft
Apron Width @ Outlet = 6 ft
Apron Width @ End = 18.0 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 5 OF 6

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 10-23-23 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Brayden Preserve Subdivision 1997 REVISION / X /
LOCATION BY RECORD / X /
Harnett County, North Carolina Caleb Kernan OTHER / X /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 10 OUT Q1o/Qfull = 0.10
Pipe Dia= 18 in V/Vfull = 0.67
Qio= 1.08 cfs V= 4.0 fps
Qfull = 10.50 cfs
Vfull = 5.94 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D50 = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
Apron Length = 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
Length
1997-Storm drainage.xlsx LATEST REVISION: 1/17/2024 5:21 PM PAGE 6 OF 6