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Home My WebLink AboutSW5221102_Design Calculations_20230414W00*ON 1833N19N3SADOiS•MMM 9618-69-V (Z9Z) :3NOHd 998LZ •0•N '3-nIAHSVN 80l l X08 '0•d J N 12� 3 �3 N IJ N 308 • N /F BISSETT INVESTMENTS LLC PIN• 286000284723 VNI701f V3 Hml HON IdOH 9NlffdS NOISIAiagns 39aim S,NOSAM9 EIP 1" 77 SSA°�3� D.B. 3000, PG. 168 SO°16'52"W TOP 3.85' (tie) EIP 242•g' �' \ _ 1 8 \ \ EIP 1 I I 1r 00'/400 g7> I 1 1 I 1 1 \\ 1 1 I \ \\ \\I cc CLARK I N , I i i i \\ 11 11 1 _ \\ 0260736 1 N ni PG. 52066 67 \\ \\ 1 \, \\ 1 \ I �/ / .� .� 91, 4A SF\\ I 51355 SF I 0 \ 1 'S-4 89 1 I 26 .22 \ \ II �5 \ \ \ \ 111 ISFI \ \ 1tq�oq I I I M/ 1/ S-44\A� \ \ \ I 1 o r / / 3�, 8 \ I \ \ \ I 1 �/ // l /0J11 Ac. I I \ I 165 _ CNN + I \ I 1$1 �3 �4 \ 1 1 I I I r/ / / — ' — VE M \10\J2\9 F 1 111 I I II / 26 s1 S-4--- s1.5_ --—�----- I1 02 X \\ I I I N 1 I I I 69 I I 5 \ C \ 11 I II I I 1 \ co I s1 \ \ \ \ \ \ I II 80,1 i N 1 _ 11 1 1 1 .48 ` SF 4`c. 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".' ram' :. • 1 I 252.16 ■ ' ' � ��]■■■■■■■■■■■■■►■■■►7■■■■■■■■■■■■Ill�i■■■■■■■■\■■■■■■■I■■■■■■■C\■■■■■■■■■■■■■■■■■■■■, i � � / 1, � ■ — — Evy �■ `1 lf:1460 LAW L WA OWN �•0 LEI_ •� / � � i � . , ' i 1 �'♦•••♦ � ♦��O\ �� ` 1, ■ :.I;,.0.201�Acjl .::. • ■ � ` � �•�•-TID� �� . ■ �''. � • •ate ' � •♦♦ ' IN ■ Swale Calculation Summary Rational Method Q=CIA 1= 6.64 in/hr (10 year storm, 5 min ToC) Geometry Swale # Depth (ft) Sideslopes (1-1:1) Slope Drainage Area (Acres) BUA (ac) Pervious C Q Vallow Vactual Flow depth S-1 0.5 15 1.5% 0.21 0.07 0.14 0.58 0.81 4.50 1.12 0.22 S-2 1 4 1.5% 0.31 0.07 0.24 0.52 1.08 4.50 1.69 0.40 S-3 1 4 5.0% 0.24 0.07 0.17 0.56 0.89 4.50 2.47 0.30 S-4 1 15 1.5% 0.21 0.07 0.14 0.58 0.81 4.50 1.12 0.22 S-5 1 15 1.5% 0.21 0.07 0.14 0.58 0.81 4.50 1.12 0.22 S-6 1 10 5.0% 0.19 0.07 0.12 0.60 0.76 4.50 1.90 0.20 S-7 1 6 1.5% 0.31 0.10 0.21 0.58 1.19 4.50 1.53 0.36 S-8 1 15 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.08 0.20 S-9 1 10 2.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.47 0.21 S-10 1 15 1.5% 0.16 0.07 0.09 0.64 0.68 4.50 1.03 0.21 S-11 1 15 2.0% 0.15 0.07 0.08 0.66 0.65 4.50 1.22 0.19 S-12 1 15 4.0% 0.15 0.07 0.08 0.66 0.65 4.50 1.52 0.17 5-13 1 10 5.0% 0.15 0.07 0.08 0.66 0.65 4.50 1.69 0.16 S-14 1 10 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.13 0.24 S-15 1 10 1.5% 0.16 0.07 0.09 0.64 0.68 4.50 1.18 0.24 S-16 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-17 1 10 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.13 0.24 S-18 1 10 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.13 0.24 5-19 1 10 1.5% 0.13 0.07 0.06 0.70 0.60 4.50 1.13 0.23 S-20 1 15 1.5% 0.10 0.07 0.03 0.79 0.52 4.50 0.96 0.19 S-21 1 15 1.5% 0.09 0.07 0.02 0.83 0.49 4.50 1.01 0.18 S-22 1 15 3.3% 0.10 0.07 0.03 0.79 0.52 4.50 1.35 0.16 S-23 1 15 5.0% 0.11 0.07 0.04 0.75 0.55 4.50 1.63 0.15 S-24 1 15 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.07 0.21 S-25 1 15 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.08 0.20 S-26 1 10 5.0% 0.12 0.07 0.05 0.72 0.57 4.50 1.76 0.18 S-27 1 15 1.5% 0.12 0.07 0.05 0.72 0.57 4.50 0.66 0.24 S-28 1 15 1.5% 0.13 0.07 0.06 0.70 0.60 4.50 1.00 0.20 S-29 1 15 1.5% 0.16 0.07 0.09 0.64 0.68 4.50 1.07 0.20 S-30 1 15 1.5% 0.22 0.07 0.15 0.58 0.84 4.50 1.16 0.84 5-31 1 15 1.5% 0.18 0.07 0.11 0.61 0.73 4.50 1.10 0.21 S-32 1 15 1.5% 0.13 0.07 0.06 0.70 0.60 4.50 1.00 0.20 S-33 1 3 1.5% 0.15 0.07 0.08 0.66 0.65 4.50 1.58 0.37 S-34 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-35 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-36 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 5-37 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-38 1 10 1.5% 0.18 0.07 0.11 0.61 0.73 4.50 1.17 0.25 S-39 1 10 1.5% 0.16 0.07 0.09 0.64 0.68 4.50 1.18 0.24 S-40 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-41 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-42 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 5-43 1 10 1.5% 0.17 0.07 0.10 0.63 0.71 4.50 1.23 0.24 S-44 1 10 1.5% 0.16 0.07 0.09 0.64 0.68 4.50 1.18 0.24 S-45 1 10 1.5% 0.21 0.07 0.14 0.58 0.81 4.50 1.20 0.26 S-46 1 10 1.5% 0.08 0.00 0.08 0.40 0.21 4.50 0.82 0.16 S-47 1 3 2.0% 0.83 0.40 0.43 0.67 3.67 4.50 2.59 0.43 Channel Report Hydraflow Express Extension for AUtodeskS AutoCADO Civil 3DO by Autodesk, Inc. S-47 Trapezoidal Bottom Width (ft) = 2.00 Side Slopes (z:1) = 3.00, 3.00 Total Depth (ft) = 1.00 Invert Elev (ft) = 100.00 Slope (%) = 2.00 N-Value = 0.035 Calculations Compute by: Known Q Known Q (cfs) = 3.67 Elev (ft) Section 102.00 101.50 101.00 100.50 100.00 99.50 Monday, Apr 10 2023 Highlighted Depth (ft) = 0.43 Q (cfs) = 3.670 Area (sqft) = 1.41 Velocity (ft/s) = 2.59 Wetted Perim (ft) = 4.72 Crit Depth, Yc (ft) = 0.39 Top Width (ft) = 4.58 EGL (ft) = 0.53 1 2 3 4 5 6 7 8 9 10 Reach (ft) Depth (ft) 2.00 1.50 1.00 0.50 wixffel Project: Location: Date: Basin ID: • MENGINEERING Wet Pond Design Bryson's Ridge Subdivision Spring Hope, NC 17-Oct-22 Drainage Area (A) 27.26 Acres Impervious Area 10.9 Acres % Impervious (1) 39.99% Water Qualitv Volume Calculate Rv: Rv = 0.05+.9 X I Rv =1 0.41 WQV = 3630 X RD X Rv X A Ro = 1.00 Inch WQV = 40,558 ICF Includes all impervious for development and offsite drainage area at 100% BUA. Surface Area Average Depth = 4.00 SA/DA Ratio = 1.24 (Choose SA/DA Ration from the NC BMP Maunual Table 1 or 2) Orifice Sizing Surface Area = (SA/DA Ratio / 100) X Area (Ac.) / 43,560 (SF/Ac.) 14,724 SF Design Orifice Q= CDAO 2gHo CD = 0.6 g= 32.2 FT/S2 Ho = H/3= 0.67 FT H= 2 FT Storage @ 245.5' 61872 FTA3 Ao = 0.06 FEET Design Pipe = 3.25 INCH Design Orifice Q = 0.23 CFS Days to Drain =1 3.2 Wetland Plants - Vegetative Shelf Vegetative Shelf SurfaceArea = 4506 SF # of Wetland Plants = 1127 WET DETENTION FOREBAY VOLUME COMPARISON FOREBAY VOLUME ELEVATI ON SURFAC E AREA INCREME NTAL VOLUME 239.0 1,375.0 1,857.5 240.0 2,340.0 2,810.5 241.0 3,281.0 3,868.5 242.0 4,456.0 5,026.5 243.0 5,597.0 2,989.8 243.5 6,362.0 SUM = 16,552.8 Forebay is 18.9% of Pond. Pond Average Depth: 1 4.3 Feet POND VOLUME ELEVATI ON SURFAC E AREA INCREME NTAL VOLUME 237.0 8,546.0 9,232.5 238.0 9,919.0 10,643.5 239.0 11,368.0 12,125.5 240.0 12,883.0 13,674.0 241.0 14,465.0 15,290.0 242.0 16,115.0 16,969.5 243.0 17,824.0 9,598.0 243.5 20,568.0 SUM = 87,533.0 Project: Location: Date: Basin ID: • MENGINEERING Wet Pond Design Bryson's Ridge Subdivision Spring Hope, NC 17-Oct-22 Drainage Area (A) 5.98 Acres Impervious Area 2.56 Acres % Impervious (1) 42.81% Water Qualitv Volume Calculate Rv: Rv = 0.05+.9 X I Rv =1 0.44 WQV = 3630 X RD X Rv X A Ro = 1.00 Inch WQV = 9,449 ICF Includes all impervious for development and offsite drainage area at 100% BUA. Surface Area Average Depth = 4.00 SA/DA Ratio = 1.51 (Choose SA/DA Ration from the NC BMP Maunual Table 1 or 2) Orifice Sizing Surface Area = (SA/DA Ratio / 100) X Area (Ac.) / 43,560 (SF/Ac.) 3,933 SF Design Orifice Q= CDAO 2gHo CD = 0.6 g= 32.2 FT/S2 Ho = H/3= 0.67 FT H= 2 FT Storage @ 255.5' 18953 FTA3 Ao = 0.01 FEET Design Pipe = 1.5 INCH Design Orifice Q = 0.05 CFS Days to Drain =1 4.5 Wetland Plants - Vegetative Shelf Vegetative Shelf SurfaceArea = 1344 SF # of Wetland Plants = 336 WET DETENTION FOREBAY VOLUME COMPARISON FOREBAY VOLUME ELEVATION SURFAC E AREA INCREME NTAL VOLUME 250.5 838.0 479.3 251.0 1,079.0 1,322.5 252.0 1,566.0 1,840.5 253.0 2,115.0 1,153.8 253.5 2,500.0 SUM = 4,796.0 Forebay is 19.5% of Pond. Pond Average Depth: 1 4.4 Feet POND VOLUME ELEVATI ON SURFAC E AREA INCREME NTAL VOLUME 246.0 1,722.0 1,897.0 247.0 2,072.0 2,262.5 248.0 2,453.0 2,658.0 249.0 2,863.0 3,083.0 250.0 3,303.0 3,537.0 251.0 3,771.0 4,019.5 252.0 4,268.0 4,529.0 253.0 4,790.0 2,602.8 253.51 5,621.0 SUM = 24,588.8