SW6240607_Design Calculations_20240830 (17)

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 3-22-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Rolling Springs Section 9 2029 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina CEK OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 1 OUT Qio/Qfull = 0.32
Pipe Dia= 30 in V/Vfull = 0.87
Q10= 28.66 cfs V= 15.8 fps
Qfull = 88.98 cfs
Vfull = 18.10 fps
From Fig. 8.06.b.1: Zone = 5
From Fig. 8.06.b.2: D5o = 14 in
DMAX = 21 in
III
:•:•:•:•:•: Riprap Class = 2
i�����i���� L Apron Thickness = 31.5 in
0•0-0•0•0•: _�•������=�� 3 Apron Length 25.0 ft
1••�••�••�••�••�••�•• Apron Width @ Outlet = 7.5 ft
Apron Width @ End = 27.5 ft
Length
Storm Outlet Structure
FES No.= PIPE 2 OUT Q1o/Qfull = 0.39
Pipe Dia= 18 in V/Vfull = 0.93
Q10= 8.85 cfs V= 12.1 fps
Qfull = 22.97 cfs
Vfull = 12.98 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D50 = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length 12.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 13.5 ft
Length
2029-Storm drainage.xlsx LATEST REVISION:8/30/2024 3:48 PM PAGE 1 OF 4

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 3-22-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Rolling Springs Section 9 2029 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina CEK OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 3 OUT Qio/Qfull = 0.43
Pipe Dia= 24 in V/Vfull = 0.96
Qio= 16.60 cfs V= 11.8 fps
Qfull = 38.64 cfs
Vfull = 12.28 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D50 = 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
L Length 1
Storm Outlet Structure
FES No.= PIPE 4 OUT Qio/Qfull = 0.21
Pipe Dia= 18 in V/Vfull = 0.78
Q10= 3.61 cfs V= 7.6 fps
Qfull = 17.19 cfs
Vfull = 9.72 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D5o = 8 in
DMAX = 12 in
�:�:�:�:�:�:�: Riprap Class = B
Apron Thickness = 18 in
IIIIIII';IIII1J
_Apron Length 9.0 ft
Apron Width @Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
Length
2029-Storm drainage.xlsx LATEST REVISION:8/30/2024 3:48 PM PAGE 2 OF 4

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 3-22-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Rolling Springs Section 9 2029 REVISION / /
LOCATION BY RECORD / /
Harnett County, North Carolina CEK OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 5 OUT Qio/Qfull = 0.16
Pipe Dia= 18 in V/Vfull = 0.72
Qio= 1.22 cfs V= 3.0 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
L Length 1
Storm Outlet Structure
FES No.= PIPE 6 OUT Qio/Qfull = 0.60
Pipe Dia= 48 in V/Vfull = 1.05
Q10= 84.14 cfs V= 11.6 fps
Qfull = 139.08 cfs
Vfull = 11.05 fps
From Fig. 8.06.b.1: Zone = 4
From Fig. 8.06.b.2: D5o = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length 32.0 ft
Apron Width @ Outlet = 12 ft
Apron Width @ End = 36.0 ft
Length
2029-Storm drainage.xlsx LATEST REVISION:8/30/2024 3:48 PM PAGE 3 OF 4

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 3-22-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Rolling Springs Section 9 2029 REVISION / X /
LOCATION BY RECORD / X /
Harnett County, North Carolina CEK OTHER / X /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 7 OUT Qio/Qfull = 0.97
Pipe Dia= 42 in V/Vfull = 1.14
Qio= 68.90 cfs V= 8.4 fps
Qfull = 71.14 cfs
Vfull = 7.38 fps
From Fig. 8.06.b.1: Zone = 3
From Fig. 8.06.b.2: D50 = 10 in
DMAX = 15 in
Riprap Class = 1
s Apron Thickness = 22.5 in
3 Apron Length 28.0 ft
Apron Width @ Outlet = 10.5 ft
Apron Width @ End = 31.5 ft
L Length 1
Storm Outlet Structure
FES No.= PIPE 8 OUT Qio/Qfull = 0.42
Pipe Dia= 30 in V/Vfull = 0.94
Q10= 22.90 cfs V= 10.5 fps
Qfull = 54.63 cfs
Vfull = 11.12 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 = 20.0 ft
Apron Width @ Outlet = 7.5 ft
Apron Width @ End = 22.5 ft
Length
2029-Storm drainage.xlsx LATEST REVISION:8/30/2024 3:48 PM PAGE 4 OF 4