HomeMy WebLinkAboutSW6220301_Long Point Rip Rap Calculations_20221116Project Name Riprap Dissipator #1 Date
Long Point Reserve May, 2021
DD Project No.
Location D&L Engineering, PLLC DD2104
Vass, North Carolina 150 S. Page Street Calculated By
Southern Pines, NC 28387 JLH
(910) 684-8646 Checked By
P-2587 J L H
STORM DESIGN: 25 Year 8,87 in/hr
BACKGROUND: Use the E&5 Control Planning & Design Manual, Section 8.06.
REFERENCE: (NCDEHNR, 1993)
Step 1. Minimum Tailwater Condition
Step 2.
D-o =
18 in.
D-o =
1.50 ft.
Q-25 =
2.34 ofs
d-50 =
0.3 ft.
L-a =
9 ft.
Step 3.
3*0-o =
4.50 ft.
W =
10.50 ft.
Step 4.
d-max
0.45 ft.
d-max
5 in.
Step 5.
Thickness =
0.68 ft.
Thickness =
8 in.
DESIGN DIMENSIONS:
Pipe diameter in inches
Pipe diameter in feet
Pipe outlet (from drainage calculations)
from Figure 8.06 a
from Figure 8.06 a
3 times the outlet pipe diameter
Pipe diameter + Apron length
Maximum Stone Diameter (1.5*d-50) in inches
Maximum Stone Diameter (1.5*d-50) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in inches
Apron Dimensions
Riprap
Length
Width
3-D-o
Thick
Class
9
11
5
18in.
B
TERMINOLOGY: Q10 = 10-Year Design Storm, Peak Discharge, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (ft.)
L-a = Length of Rip -Rap Apron, (ft.)
3*0-o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft. & in.)
Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.)
Project Name
Long Point Reserve
Riprap Dissipator #2
Location D&L Engineering, PLLC
Vass, North Carolina 150 S. Page Street
Southern Pines, NC 28387
(910) 684-8646
P-2587
STORM DESIGN: 25 Year 8.87 inlhr
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06.
REFERENCE: (NCDE-1NR, 1993)
Step 1. Minimum Tailwater Condition
Step 2. D-o =
18 in.
D-o =
1.50 ft.
Q-25 =
7.41 cfs
d-50 =
0.3 ft.
L-a =
9 ft.
Step 3. 3"D-o = 4.50 ft.
W = 10.50 ft
Step 4. d-max 0.45 ft.
d-max 5 in.
Step S. Thickness = 0.68 ft.
Thickness = 8 in.
IDESIGN DIMENSIONS:
Pipe diameter in inches
Pipe diameter in feet
Pipe outlet (from drainage calculations)
from Figure 8.06 a
from Figure 8.06 a
3 times the outlet pipe diameter
Pipe diameter + Apron length
Date
May, 2021
DO Project No.
DD2104
Calculated By
JLH
Checked By
JLH
Maximum Stone Diameter (1.5"d-50) in inches
Maximum Stone Diameter (1.5'd-50) in feet
Min. Apron Thickness With Filter Fabric (1.5"d-max) in feet
Min. Apron Thickness With Filter Fabric (1.5'd-max) in inches
Apron Dimensions
Rlprap
Length
Width
3'D-o
Thick
Class
9
11
5
1811n.
B
TERMINOLOGY: Q10 = 10-Year Design Storm, Peak Discharge, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (fL)
L-a = Length of Rip -Rap Apron. (ft.)
3"D-o = Width of Rip -Rap Apron @ Pipe Cutlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft. & in.)
Thickness = Thickness of Rip -Rap Apron With Fitter Fabric, (ft. &in.)
Project Name
Long Paint Reserve
Riprap Dissipator 43
Date
Jun, 2021
DID Project No.
DD2104
Location D&L Engineering, PLLC
Vass, North Carolina 150 S. Page Street
Southern Pines, NC 28387
(910) 684-8646
P-2587
Calculated By
JLH
Checked By
J L H
STORM DESIGN: 25 Year 8.87 inlhr
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06.
REFERENCE: (NCDEHNR, 1993)
The existing 36" pipe comes from US HWY 15-501 from which NCDOT has no flow calculations.
The discharge shown is based on pipe flowing full based on the existing slope
Step 1. Minimum Tallwater Condition
Step 2. D-o =
18 in.
Pipe diameter in inches
D-o =
1.50 ft.
Pipe diameter in feet
0-25 =
8.80 cfs
Pipe outlet (from drainage calculations)
d-50 =
0.3 ft.
from Figure 8.06 a
L-a =
9 ft.
from Figure 8.06 a
Step 3.
Step 4.
Step 5.
3*D-o = 4.50 ft.
W = 10.50 ft.
d-max 0.45 ft.
d-max 5 in.
Thickness = 0.68 ft.
Thickness = 8 in.
DESIGN DIMENSIONS:
3 times the outlet pipe diameter
Pipe diameter + Apron length
Maximum Stone Diameter (1.5*d-50) in inches
Maximum Stone Diameter (1.5*d-50) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in inches
Apron Dimensions
Riprap
Length Width
3-D-o
Thick
Class
9 11
5
18in.
B
TERMINOLOGY: Q10 = 10-Year Design Storm, Peak Discharge, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (ft.)
L-a = Length of Rip -Rap Apron. (ft.)
3*D-o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft. & in.)
Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.)
Project Name
Long Point Rcscrve
Riprap Dissipator #4
Location D&L Engineering, PLLC
Vass, North Carolina 150 S. Page Street
Southern Pines, NC 28387
(910) 684-8646
P-2587
STORM DESIGN: 25 Year 8.87 inlhr
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06.
PREFERENCE: (NCDENNR. 1993)
Step 1. Minimum Tailwater Condition
Date
May, 2021
DID Project No.
eD2104
Calculated By
JLH
Checked By
JLH
Step 2.
D-o =
18 in.
Pipe diameter in inches
D-o =
1.50 ft.
Pipe diameter in feet
Q-25 =
11.97 cfs
Pipe outlet (from drainage calculations)
d-50 =
0.3 ft.
from Figure 8.06 a
L-a =
10 ft.
from Figure 8.06 a
Step 3.
3*D-o =
4.50 ft.
3 times the outlet pipe diameter
W =
11.50 ft.
Pipe diameter + Apron length
Step 4.
d-max
0.45 ft.
Maximum Stone Diameter (1.5*d-50) in inches
d-max
5 in.
Maximum Stone Diameter (1.5*d-50) in feet
Step 5.
Thickness =
0.68 ft.
Min. Apron Thickness With Filter Fabric (1.5*d-max) in feet
Thickness =
8 in.
Min. Apron Thickness With Filter Fabric (1.5*d-max) in inches
IDESIGN DIMENSIONS:
Apron Dimensions
Riprap
Class
Length
Width
3*11)-o
Thick
10
12
5
18in_
B
TERMINOLOGY: Q10 = 10-Year Design Storm, Peak Discharge, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (ft.)
L-a = Length of Rip -Rap Apron, (ft.)
34D-o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft. & in.)
Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft, &in.)
Project Name
Long Point Reserve
Riprap Dissipator 45
Location D&L Engineering, PLLC
Vass, North Carolina 150 S. Page Street
Southern Pines, NC 28387
(910) 684-8646
P-2587
STORM DESIGN: 25 Year 8.87 inlhr
BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06
PREFERENCE: (NCDEHNR, 1993)
Step 1. Minimum Tailwater Condition
Step 2. D-o =
15 in.
D-o =
1.25 ft.
Q-25 =
1.09 cfs
d-50 =
0.3 ft.
L-a =
9 ft.
Step 3.
3*D-o =
3.75 ft.
W =
10.25 ft.
Step 4.
d-max
0.45 ft.
d-max
5 in.
Step 5.
Thickness =
0.68 ft.
Thickness =
8 in.
GN DIMENSIONS:
Pipe diameter in inches
Pipe diameter in feet
Pipe outlet (from drainage calculations)
from Figure 8.06 a
from Figure 8.06 a
3 times the outlet pipe diameter
Pipe diameter + Apron length
Date
May, 2021
DID Project No.
DD2104
Calculated By
JLH
Checked By
JLH
Maximum Stone Diameter (1.5"d-50) in inches
Maximum Stone Diameter (1.5*d-50) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in feet
Min. Apron Thickness With Filter Fabric (1.5*d-max) in inches
Apron Dimensions
Riprap
Class
Length
Width
3-D-o
Thick
9
11
4
18in.
B
NOLOGY: Q10 = 10-Year Design Storm, Peak Discharge, (cfs)
D-o = Pipe Diameter, (in. & ft.)
d-50 = Mean Stone Diameter of Rip -Rap, (ft.)
L-a = Length of Rip -Rap Apron, (ft.)
3*D-o = Width of Rip -Rap Apron @ Pipe Outlet, (ft.)
W = Width of Rip -Rap Apron @ End of Apron, (ft.)
d-max = Maximum Stone Diameter of Rip -Rap, (ft. & in.)
Thickness = Thickness of Rip -Rap Apron With Filter Fabric, (ft. &in.)