SW6220902_Design Calculations (Riprap)_20221102

ATE
DESIGN PHASE
1-20-22
PRELIM
rPROJECT NAME
PROJECT NO
CONSTR / Xlake
II Ph. II
1632
REVISIONTION
RECORD
BY
Hoke County, North Carolina
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Storm Outlet Structure
FES No.=
Ditch #1
Pipe Dia=
24
in
Q10 =
5.52
cfs
Qfull =
14.03
cfs
Vfull =
11.42
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
s
Length
Storm Outlet Structure
FES No.=
Ditch #2 & #3
Pipe Dia=
24 in
Q10 =
26.58 cfs
Qfull =
42.35 cfs
Vfull =
16.18 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
Q10/Qfull = 0.39
V/Vfull = 0.93
V = 10.6 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 12.0 ft
= 6 ft
= 14.0 ft
Q10/Qfull = 0.63
V/Vfull = 1.06
V = 17.1 fps
= 3
= 10 in
= 15 in
= 1
= 22.5 in
= 16.0 ft
= 6 ft
= 18.0 ft
1632P2 STORM.xlsx LATEST REVISION: 11/2/2022 7:08 AM PAGE 1 OF 5

ATE
DESIGN PHASE
PRELIM
1-20-22
rPROJECT NAME
PROJECT NO
CONSTR / Xlake
II Ph. II
1632
REVISIONTION
RECORD
BY
Hoke County, North Carolina
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Storm Outlet Structure
FES No.=
Ditch #4
Pipe Dia=
24
in
Q10 =
4.49
cfs
Qfull =
8.88
cfs
Vfull =
7.23
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Storm Outlet Structure
FES No.=
Ditch #5
Pipe Dia=
24
in
Q10 =
4.91
cfs
Qfull =
7.52
cfs
Vfull =
6.12
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
Q1 o/Qfu I = 0.51
V/Vfu11 = 1.00
V = 7.2 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 12.0 ft
= 6 ft
= 14.0 ft
Q10/Qfu11 = 0.65
V/VfuI1 = 1.07
V = 6.5 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 12.0 ft
= 6 ft
= 14.0 ft
1632P2 STORM.xlsx LATEST REVISION: 11/2/2022 7:08 AM PAGE 2 OF 5

ATE
DESIGN PHASE
PRELIM
1-20-22
rPROJECT NAME
PROJECT NO
CONSTR / Xlake
II Ph. II
1632
REVISIONTION
RECORD
BY
Hoke County, North Carolina
UP
OTHER
(SPECIFY)
CHECKED BY
CSB
Storm Outlet Structure
FES No.=
Ditch #6
Pipe Dia=
24
in
Q10 =
4.81
cfs
Qfull =
15.64
cfs
Vfull =
12.73
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Storm Outlet Structure
FES No.=
Ditch #7
Pipe Dia=
24
in
Q10 =
22.45
cfs
Qfull =
79.62
cfs
Vfull =
28.73
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
Q1 o/Qfu I = 0.31
V/Vfu11 = 0.87
V= 11.1 fps
= 3
= 10 in
= 15 in
= 1
= 22.5 in
= 16.0 ft
= 6 ft
= 18.0 ft
Q10/Qfu11 = 0.28
V/Vfu11 = 0.85
V = 24.5 fps
= 3
= 10 in
= 15 in
= 1
= 22.5 in
= 16.0 ft
= 6 ft
= 18.0 ft
1632P2 STORM.xlsx LATEST REVISION: 11/2/2022 7:08 AM PAGE 3 OF 5

ATE
DESIGN PHASE
PRELIM
1-20-22
rPROJECT NAME
PROJECT NO
CONSTR / X /
lake II Ph. II
1632
REVISION / X /
RECORD / X /
TION
BY
Hoke County, North Carolina
UP
OTHER / X /
(SPECIFY)
CHECKED BY
CSB
Storm Outlet Structure
FES No.=
Ditch #9
Pipe Dia=
24
in
Q10 =
4.32
cfs
Qfull =
12.00
cfs
Vfull =
9.76
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Storm Outlet Structure
FES No.=
Ditch 11
Pipe Dia=
24
in
Q10 =
5.76
cfs
Qfull =
10.20
cfs
Vfull =
8.30
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
Q10/Qfu11 = 0.36
V/Vfu I = 0.91
V = 8.9 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 12.0 ft
= 6 ft
= 14.0 ft
Q10/Qfu11 = 0.56
V/Vfu I = 1.02
V = 8.5 fps
= 2
= 8 in
= 12 in
= B
= 18 in
= 12.0 ft
= 6 ft
= 14.0 ft
1632P2 STORM.xlsx LATEST REVISION: 11/2/2022 7:08 AM PAGE 4 OF 5

OUTLET PROTECTION
DATE
DESIGN01-20-22
PROJECT NAME PROJECT NO
Woodlake II Ph. II 1632
LOCATION BY
Hoke County, North Carolina UP
CHECKED BY
CSB
Storm Outlet Structure
FES No.=
DBL 78
Pipe Dia=
78
in
Q10 =
339.00
cfs
Qfull =
677.00
cfs
Vfull =
11.00
fps
From Fig.
8.06.b.1:
From Fig.
8.06.b.2:
Zone
D5o
DMAX
Riprap Class
Apron Thickness
Apron Length
Apron Width @ Outlet
Apron Width @ End
Q1 o/Qfu I I =
V/Vfu I I =
V=
Storm Outlet Structure (TYP SKIMMER)
FES No.= Skimmer Q10/QfuII =
Pipe Dia= 2 in V/VfuII =
Q10 = 0.80 cfs V =
Qfull = 0.80 cfs
Vfull = 3.71 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
DESIGN PHASE
PRELIM
CONSTR
REVISION
RECORD
OTHER
(SPECIFY)
0.50
1.00
11.0 fps
4
10 in
15 in
1
22.5 in
52.0 ft
19.5 ft
58.5 ft
1.00
1.14
4.2 fps
1
4 in
6 in
A
9 in
0.5 ft
0.375 ft
0.6 ft
/X/
1632P2 STORM.xlsx LATEST REVISION: 11/2/2022 7:08 AM PAGE 5 OF 5