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Home My WebLink AboutSW6210303_Rip Rap Phase 2_20210329STORM DESIGN: 10 Year ROUND: Use the E&S Control Planning & Design Manual, Section 8.06. FERENCE: (NCDEHNR, 1993) Stop 1. Minimum Tallwater Condition Stop 2. D-o = 18 in. D-o = 1.50 fL Q-25 = 10.30 Cfs. d-50 = 0.3 ft. L-a = 9 ft. Pipe diameter in inches Pipe diameter in feet Pipe outlet (from drainage calculations) from Figure 8.06 a from Figure 8.06 a Step 3. 3*D-o = 4.50 ft. 3 times the outlet pipe diameter W = 10.50 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: 010 = 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 a e Watson Ridge Phase 2 Nov,2020 DD Project No. Location Double D Engineering, PLLC DD2011 Lee/Harnett County, North Carolina 110 Commerce Avenue Calculated By I Southern Pines, NC 28387 JLH (910) 684-8126 Checked By JILH STORM DESIGN: 25 Year BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06. ERENCE: (NCDEHNR, 1993) Step 1. Minimum Tallwater Condition Step 2. D-o = 18 in. Pipe diameter in inches D-o = 1.50 ft. Pipe diameter in feet Q-25 = 0.80 cis 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*0-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 17 9 5 B RMINOLOGY: 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.) STORM DESIGN: 10 Year BACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06. IREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D-o = 18 in. Pipe diameter in inches D-o = 1.50 ft. Pipe diameter in feet 0-25 = 9.70 cfs Pipe outlet (from drainage calculations) d-50 = 0.3 ft. from Figure 8.06 a L-a = 9ft. from Figure 8.06 a Step 3. Step 4. Step S. 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. IDESIGN 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 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 Watson Ridge Phase 2 Date Nov,2020 DD Project No. Double D Engineering, PLLC DD2011 110 Commerce Avenue Calculated By Southern Pines, NC 28387 JLH (910) 684-8126 Checked By JLH IBACKGROUND: Use the E&S Control Planning & Design Manual, Section 8,06. IREFERENCE: (NCDEHNR 1993) Stop 1. Minimum Tailwater Condition Step 2. D-o = 18 in. Pipe diameter in inches D-o = 1.50 ft. Pipe diameter in feet Q-25 = 9.70 cis 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. Stop 4. Step 5. 3*D-o = 4.50 ft. W= 10�50ft d-max 0.45 ft. d-max 5 in. Thickness = 0.68 ft. Thickness = 8 in. I 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 lilt 9 11 5 18in. B TERMINOLOGY: Q10 = 1 0-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.) STORM DESIGN: 10 Year IBACKGROUND: Use the E&S Control Planning & Design Manual, Section 8.06. IREFERENCE: (NCDEHNR, 1993) Step 1. Minimum Tailwater Condition Step 2. D-o = 18 in. Pipe diameter in inches D-o = 1.50 ft. Pipe diameter in feet Q-25 = 7.20 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. IDESIGN 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 TERMINOLOGY: 0 10 = 1 0-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 Q 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.)