SW6220501_Design Calculations (Riprap) (2)_20220825

• ' ' • •
DATE
DESIGN PHASE
1
02-11-22
PRELIM
PROJECT NAME
CONSTR
! X
PROJECT NO
South Park
'1722
REVISION
RECORD
LOCATION
BY
Hoe Mills, North Carolina
CJP
JOTHER
(SPECIFY)
CHECKED BY
CSB
Storm Outlet Structure
FES No.= PO 17
Q10/Qfull =
0.08
Pipe Dia= 15 in
V/Vfull =
0.59
Q10 = 1.15 cfs
V =
7.1
fps
Qfull = 14.76 cfs
`,/full = 12.01 fps
From Fig. 8.06.b.1.
Zone
—
2
From Fig. 8.06.b.2:
D50
=
8
in
DMAx
=
12
in
Riprap Class
=
B
Apron Thickness
=
18
in
3
Apron Length
=
7.5
ft
Apron Width @ Outlet
=
3.75
ft
Length I
Apron Width @ End
=
8.8
ft
Storm Outlet Structure
FES No.= PO 12
Q10/Qful1 =
0.20
Pipe Dia= 24 in
V/Vfull =
0.78
Q10 = 11.77 cfs
V =
14.8
fps
Qfull = 59.49 cfs
Vfull = 18.91 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
3
Apron Length
=
12.0
ft
Apron Width @ Outlet
=
6
ft
Length
Apron Width @ End
=
14.0
ft
1722 Storm System.xlsx LATEST REVISION: 3/30/2022 1:22 PM PAGE 1 OF 3