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HomeMy WebLinkAboutSW6240106_Design Calculations_20240516 (3) DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC Pr/O.il Ct NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County. North Carolina BY 150 S. Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity. V.through the TYPICAL SECTION Use Trial&Error to make the flow depth,d. result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8 87 in/hr Area 9.630 AC Built Upon Area 1.114 AC Runoff C 0.9 Weighted"C" 0 369 Grassed Area 8.516 AC Runoff C 0.3 Q25: 31.55 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.990 FT A= 10.86 FTA2 Slope Condition P= 14.26 FT n= 0.030 (DEHNR, 1993) R= 0.76 B= 8 FT Q= 31.81 CFS Z= 3 1 V= 2.93 FPS S= 0.0050 FT/FT W= 13.94 FT S= 0.50 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.31 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B.1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge.(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow. (FT) d= Maximum Depth of Water. (FT) R= Hydraulic Radius,(FT) V= Trial Velocity. (FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge. (CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62 4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.99 FT Bottom Width 8 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR. 1988. DEHNR, 1993) DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County, North Carolina BY 150 S. Page Street DTU Southern Pines, NC 28387 I OCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity V.through the TYPICAL SECTION Use Trial&Error to make the flow depth.d. result with Q=025 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 3.681 AC Built Upon Area 1.039 AC Runoff C 0.9 Weighted"C" 0.469 Grassed Area 2.642 AC Runoff C 0.3 Q25: 15.32 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.900 FT A= 5.13 FT^2 Slope Condition P= 8.69 FT n= 0.030 (DEHNR. 1993) R= 0.59 8= 3 FT Q= 15.53 CFS Z= 3 .1 V= 3.03 FPS S= 0.0075 FT/FT W= 8.40 FT S= 0.75 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.42 Lb/SF SIN SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow. (FT) d= Maximum Depth of Water.(FT) R= Hydraulic Radius.(FT) V= Trial Velocity,(FPS) S= Slope of the Channel. (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge. (CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.90 FT Bottom Width 3 FT Max.Slope 0.75% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988: DEHNR. 1993) DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAMF PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County.North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 1.602 AC Built Upon Area 0.496 AC Runoff C 0.9 Weighted"C" 0 486 Grassed Area 1.106 AC Runoff C 0.3 025: 6.90 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.540 FT A= 1.95 FT^2 Slope Condition P= 5.42 FT n= 0.030 (DEHNR, 1993) R= 0.36 B= 2 FT Q= 7.06 CFS Z= 3 •1 V= 3.61 FPS S= 0.0206 FT/FT W= 5.24 FT S= 206 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.69 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water.(FT) R= Hydraulic Radius,(FT) V= Trial Velocity.(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.54 FT Bottom Width 2 FT Max.Slope 2.06% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR. 1993) Swale 4 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 0.215 AC Built Upon Area 0.096 AC Runoff C 0.9 Weighted"C" 0 568 Grassed Area 0.119 AC Runoff C 0.3 025: 1.08 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.300 FT A= 0.57 FTA2 Slope Condition P= 2.90 FT n= 0.030 (DEHNR, 1993) R= 0.20 B= 1 FT Q= 1.10 CFS Z= 3 :1 V= 1.94 FPS S= 0.0133 FT/FT W= 2.80 FT S= 1.33 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.25 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A.B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water.(FT) R= Hydraulic Radius,(FT) V= Trial Velocity.(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.41b/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.30 FT Bottom Width 1 FT Max.Slope 1.33% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR 1993) DATE 3/3/2021 DOUBLED ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 _ Moore County,North Carolina BY 150 S. Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County,North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d.result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 1.564 AC Built Upon Area 0.030 AC Runoff C 0.9 Weighted"C" 0.312 Grassed Area 1.534 AC Runoff C 0.3 Q25: 4.32 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.720 FT A= 2.28 FT^2 Slope Condition P= 5.55 FT n= 0.030 (DEHNR. 1993) R= 0.41 B= 1 FT Q= 4.45 CFS Z= 3 1 V= 1.96 FPS S= 0.0051 FT/FT W= 5.32 FT S= 0.51 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.23 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B.1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge. (CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius. (FT) V= Trial Velocity, (FPS) S= Slope of the Channel. (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 lb/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.72 FT Bottom Width 1 FT Max.Slope 0.51% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR 1988 DEHNR. 1993) DATE 5/6/2024 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County, North Carolina BY 150 S. Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V.through the TYPICAL SECTION Use Trial&Error to make the flow depth.d.result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 2.861 AC Built Upon Area 0.213 AC Runoff C 0.9 Weighted"C" 0.345 Grassed Area 2.648 AC Runoff C 0.3 Q25: 8.75 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.850 FT A= 3.87 FT^2 Slope Condition P= 7.38 FT n= 0.030 (DEHNR, 1993) R= 0.52 B= 2 FT Q= 8.83 CFS Z= 3 :1 V= 2.28 FPS S= 0.0050 FT/FT W= 7.10 FT S= 0.50 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.27 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow.(FT) d= Maximum Depth of Water.(FT) R= Hydraulic Radius,(FT) V= Trial Velocity,(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge.(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.85 FT Bottom Width 2 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR. 1993) DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines, NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County,North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 1.510 AC Built Upon Area 0.406 AC Runoff C 0.9 Weighted"C" 0.461 Grassed Area 1.104 AC Runoff C 0.3 Q25: 6.18 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ftls MAXIMUM d= 0.510 FT A= 1.80 FTA2 Slope Condition P= 5.23 FT n= 0.030 (DEHNR, 1993) R= 0.34 B= 2 FT Q= 6.31 CFS Z= 3 1 V= 3.50 FPS S= 0.0206 FT/FT W= 5.06 FT S= 2.06 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.66 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: 0= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow.(FT) d= Maximum Depth of Water. (FT) R= Hydraulic Radius,(FT) V= Trial Velocity.(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge, (CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.51 FT Bottom Width 2 FT Max.Slope 2.06% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988, DEHNR, 1993) Swale 8 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC I'ROJECI NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S. Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V.through the TYPICAL SECTION Use Trial&Error to make the flow depth.d. result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 0.460 AC Built Upon Area 0 137 AC Runoff C 0.9 Weighted"C" 0.479 Grassed Area 0.323 AC Runoff C 0.3 Q25 1.95 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ftrs MAXIMUM d= 0.460 FT A= 1.09 FT^2 Slope Condition P= 3.91 FT n= 0.030 (DEHNR. 1993) R= 0.28 B= 1 FT Q= 2.02 CFS Z= 3 :1 V= 1.84 FPS S= 0.0075 FT/FT W= 3.76 FT S= 0.75 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.22 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge.(CFS) A= Cross-Sectional Area of Flow. P= Wetted Perimeter of the Flow.(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius. (FT) V= Trial Velocity,(FPS) S= Slope of the Channel. (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge.(CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.46 FT Bottom Width 1 FT Max.Slope 0.75% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR. 1988, DEHNR, 1993) Swale 9 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d, result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 3.558 AC Built Upon Area 0.967 AC Runoff C 0.9 Weighted"C" 0.463 Grassed Area 2.591 AC Runoff C 0.3 Q25: 14.61 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.880 FT A= 5.84 FT^2 Slope Condition P= 9.57 FT n= 0.030 (DEHNR 1993) R= 0.61 B= 4 FT Q= 14.77 CFS Z= 3 1 V= 2.53 FPS S= 0,0050 FT/FT W= 9.28 FT S= 050 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.27 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge.(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water. (FT) R= Hydraulic Radius,(FT) V= Trial Velocity,(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge. (CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.88 FT Bottom Width 4 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR, 1993) Swale 10 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County. North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 1.329 AC Built Upon Area 0.367 AC Runoff C 0.9 Weighted"C" 0.466 Grassed Area 0.962 AC Runoff C 0.3 Q25: 5.49 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.680 FT A= 2.76 FTA2 Slope Condition P= 6.30 FT n= 0.030 (DEHNR, 1993) R= 0.44 B= 2 FT Q= 5.55 CFS Z= 3 '1 V= 2.02 FPS S= 0.0050 FT/FT W= 6.08 FT S= 050 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.21 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow, (FT) d= Maximum Depth of Water. (FT) R= Hydraulic Radius,(FT) V= Trial Velocity,(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge, (CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.68 FT Bottom Width 2 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR, 1993) DATE 3/3/2021 DOUBLED ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S. Page Street DTU Southern Pines. NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V.through the TYPICAL SECTION Use Trial&Error to make the flow depth.d. result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 1 441 AC Built Upon Area 0.458 AC Runoff C 0.9 Weighted"C" 0 491 Grassed Area 0.983 AC Runoff C 0.3 Q25: 6.27 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.730 FT A= 3.06 FT"2 Slope Condition P= 6.62 FT n= 0.030 (DEHNR. 1993) R= 0.46 B= 2 FT Q= 6.42 CFS Z= 3 .1 V= 2.10 FPS S= 0.0050 FT/FT W= 6.38 FT S= 0.50 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.23 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1.2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge, (CFS) A= Cross-Sectional Area of Flow. P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius.(FT) V= Trial Velocity,(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.73 FT Bottom Width 2 FT Max.Slope 0.50% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988: DEHNR. 1993) DATE 4/6/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 3.789 AC Built Upon Area 1.022 AC Runoff C 0.9 Weighted"C" 0 462 Grassed Area 2.767 AC Runoff C 0.3 Q25: 15.52 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.910 FT A= 6.12 FT"2 Slope Condition P= 9.76 FT n= 0.030 (DEHNR, 1993) R= 0.63 B= 4 FT Q= 15.77 CFS Z= 3 :1 V= 2.57 FPS S= 0.0050 FT/FT W= 9.46 FT S= 0.50 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.28 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius,(FT) V= Trial Velocity.(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 lb/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.91 FT Bottom Width 4 FT Max.Slope 0.50% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR, 1993) DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines. NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County.North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V.through the TYPICAL SECTION Use Trial&Error to make the flow depth.d, result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 0.857 AC Built Upon Area 0.234 AC Runoff C 0.9 Weighted"C 0 4E4 Grassed Area 0.623 AC Runoff C 0.3 025. 3.53 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.380 FT A= 1.19 FTA2 Slope Condition P= 4.40 FT n= 0.030 (DEHNR. 1993) R= 0.27 B= 2 FT Q= 3.56 CFS Z= 3 •1 V= 2.99 FPS S= 0 0206 FT/FT W= 4.28 FT S= 2.06 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.49 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius. (FT) V= Trial Velocity.(FPS) S= Slope of the Channel. (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge, (CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min. Depth 0.38 FT Bottom Width 2 FT Max.Slope 2.06% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR. 1988; DEHNR, 1993) Swale 14 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County,North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR 025=CIA 8.87 in/hr Area 7.760 AC Built Upon Area 1.280 AC Runoff C 0.9 Weighted"C" 0 399 Grassed Area 6.480 AC Runoff C 0.3 Q25: 27.46 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.890 FT A= 7.72 FTA2 Slope Condition P= 11.63 FT n= 0.030 (DEHNR, 1993) R= 0.66 B= 6 FT Q= 27.97 CFS Z= 3 .1 V= 3.62 FPS S= 0.0092 FT/FT W= 11.34 FT S= 0.92 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.51 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow.(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius,(FT) V=Trial Velocity,(FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge.(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Mln.Depth 0.89 FT Bottom Width 6 FT Max.Slope 0.92% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988: DEHNR. 1993) DATF 3/3/2021 DOUBLED ENGINEERING, PLLC PROJECr NAME PROJFCTNO Windfall Lakes Phase 1 DD1814 Moore County, North Carolina BY 150 S. Page Street DTU Southern Pines, NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County,North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity. V.through the TYPICAL SECTION Use Trial&Error to make the flow depth. d. result with 0=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 6.258 AC Built Upon Area 1.623 AC Runoff C 0.9 Weighted"C" 0.456 Grassed Area 4.635 AC Runoff C 0.3 Q25: 25.29 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.880 FT A= 9.36 FT^2 Slope Condition P= 13.57 FT n= 0.030 (DEHNR, 1993) R= 0.69 5= 8 FT Q= 25.68 CFS Z= 3 1 V= 2.74 FPS S= 0.0050 FT/FT W= 13.28 FT S= 0.50 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.27 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A.B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow. P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water. (FT) R= Hydraulic Radius,(FT) V= Trial Velocity. (FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge. (CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.88 FT Bottom Width 8 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR 1.988 i.FHAiF Swale 16 DATE 3/3/2021 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines.NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County,North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 13.310 AC Built Upon Area 2.153 AC Runoff C 0.9 Weighted"C" 0.397 Grassed Area 11.157 AC Runoff C 0.3 Q25: 48.88 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 1.230 FT A= 14.38 FT"2 Slope Condition P= 15.78 FT n= 0.030 (DEHNR: 1993) R= 0.91 B= 8 FT Q= 47.46 CFS Z= 3 1 V= 3.30 FPS 5= 0 0050 FT/FT W= 15.38 FT S= 0.50 LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.38 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B.1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius, (FT) V=Trial Velocity,(FPS) S= Slope of the Channel.(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 lb/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 1.23 FT Bottom Width 8 FT Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR, 1993) DATE 3/3/2021 DOUBLED ENGINEERING, PLLC c:r NAME PROJECT NO Windfall Lakes Phase 1 DD1814 _ Moore County,North Carolina BY 150 S. Page Street DTU Southern Pines,NC 28387 cncnr CHECKED BY 910-684-8646 Moore County. North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V.through the TYPICAL SECTION Use Trial&Error to make the flow depth,d.result with Q=Q25 DESIGN STORM: 25-YEAR 025=CIA 8.87 in/hr Area 7 347 AC Built Upon Area 1 989 AC Runoff C 0.9 Weighted"C" 0.462 Grassed Area 5.358 AC Runoff C 0.3 Q25: 30.14 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.970 FT A= 10.58 FT^2 Slope Condition P= 14.13 FT n= 0.030 (DEHNR, 1993) R= 0.75 B= 8 FT Q= 30.64 CFS Z= 3 :1 V= 2.90 FPS S= 0.0050 FT/FT W= 13.82 FT S= 0.50 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.30 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge.(CFS) A= Cross-Sectional Area of Flow. P= Wetted Perimeter of the Flow,(FT) d = Maximum Depth of Water,(FT) R= Hydraulic Radius. (FT) V= Trial Velocity,(FPS) S= Slope of the Channel. (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Ib/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.97 FT Bottom Width 8 FT Max.Slope 0.50% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR, 1993) Swale 18 DATE 3/3/2021 DOUBLED ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S. Page Street DTU Southern Pines.NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County. North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR 025=CIA 8-87 in/hr Area 14.018 AC Built Upon Area 2.903 AC Runoff C 0.9 Weighted"C" 0.424 Grassed Area 11.115 AC Runoff C 0.3 Q25: 52.75 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 1.310 FT A= 15.63 FT^2 Slope Condition P= 16.29 FT n= 0.030 (DEHNR, 1993) R= 0.96 B= 8 FT Q= 53.40 CFS Z= 3 1 V= 3.42 FPS S= 0.0050 FT/FT W= 15.86 FT S= 0,50 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.41 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge, (CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow. (FT) d= Maximum Depth of Water.(FT) R= Hydraulic Radius,(FT) V= Trial Velocity, (FPS) S= Slope of the Channel,(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge. (CFS) B= Bottom Width of Channel. (FT) W= Top Width of Water in Channel. Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62 4 lb/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 1.31 FT Bottom Width 8 FT _ Max.Slope 0.50% Side Slopes 3 : 1 Lining EM REFERENCES: (DEHNR. 1988, DEHNR, 1993) Swale 19 DATE 5/6/2024 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County,North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity.V.through the TYPICAL SECTION Use Trial&Error to make the flow depth,d.result with Q=Q25 DESIGN STORM: 25-YEAR Q25=CIA 8.87 in/hr Area 2.770 AC Built Upon Area 0.825 AC Runoff C 0.9 Weighted"C" 0.953 Grassed Area 1.945 AC Runoff C 0.3 Q25: 23.42 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 fUs MAXIMUM d= 0.960 FT A= 8.52 FTA2 Slope Condition P= 12.07 FT n= 0.030 (DEHNR, 1993) R= 0.71 B= 6 FT Q= 23.74 CFS Z= 3 1 V= 2.79 FPS S= 0.0050 FT/FT W= 11.76 FT S= 0.50 % LINING TYPE: LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.30 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A,B,1,2) RM REVETMENT TERMINOLOGY: Q= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow,(FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius, (FT) V= Trial Velocity,(FPS) S= Slope of the Channel.(FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 Iblcf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.96 FT Bottom Width 6 FT Max.Slope 0.50% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988, DEHNR, 1993) Swale 19A DATE 5/6/2024 DOUBLE D ENGINEERING, PLLC PROJECT NAME PROJECT NO Windfall Lakes Phase 1 DD1814 Moore County, North Carolina BY 150 S.Page Street DTU Southern Pines,NC 28387 LOCATION CHECKED BY 910-684-8646 Moore County, North Carolina JLH SOLUTIONS: Determine the MAXIMUM velocity,V,through the TYPICAL SECTION Use Trial&Error to make the flow depth,d,result with Q=Q25 DESIGN STORM: 25-YEAR 025=CIA 8.87 in/hr Area 4.425 AC Built Upon Area 0.243 AC Runoff C 0.9 Weighted"C" 0 502 Grassed Area 4.182 AC Runoff C 0.3 Q25: 19.71 cfs NOTE: The velocity of the water entering a maintained veg swale must be<5 ft/s MAXIMUM d= 0.870 FT A= 7.49 FT^2 Slope Condition P= 11.50 FT n= 0.030 (DEHNR, 1993) R= 0.65 B= 6 FT Q= 19.76 CFS Z= 3 1 V= 2.64 FPS S= 0.0050 FT/FT W= 11.22 FT S= 0.50 % LINING TYPE : LINING EM S&M SEED&MULCH Shear Stress: T=YDS EM EXCELSIOR MAT T= 0.27 Lb/SF SM SYNTHETIC MAT RR RIPRAP (A.B,1,2) RM REVETMENT TERMINOLOGY: 0= Peak Discharge,(CFS) A= Cross-Sectional Area of Flow, P= Wetted Perimeter of the Flow. (FT) d= Maximum Depth of Water,(FT) R= Hydraulic Radius,(FT) V= Trial Velocity,(FPS) S= Slope of the Channel, (FT/FT) n= Manning's"n"Coefficient Q= Trial Discharge,(CFS) B= Bottom Width of Channel,(FT) W= Top Width of Water in Channel, Z= Side Slope of Channel (Z:1) T= Shear Stress in Lb/SF Y= Wt of Water(62.4 lb/cf) D= Depth Of Flow S= Slope Of Swale FINISHED DIMENSIONS: Min.Depth 0.87 FT Bottom Width 6 FT Max.Slope 0.50% Side Slopes 3 :1 Lining EM REFERENCES: (DEHNR, 1988; DEHNR. 1993)