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HomeMy WebLinkAboutSW4220601_Design Calculations_20220712STORM DRAINAGE CALCULATIONS FOR HAVENBROOKE SUBDIVISION FORSYTH COUNTY, NORTH CAROLINA .. .11. . lm LATHAM-WALTERS ENGINEERING, INC. 16507-A NORTHCROSS DRIVE HUNTERSVILLE, N.C. 28078 Phone:704-895-8484 Fax:704-237-4362 N.C. Corporate License C-1815 FOR BRAXTON REAL ESTATE AND DEVELOPMENT CO. 6420 HAMPTON KNOLL RD. CLEMMONS, NC 27012 6/16/2022 �III �ti•� , CA S �o - . SEAL a 0 185 8584 2 Dschedule (10 Yr. Storm) Page I Line Inlet Gnd/Rim Drng Total Runoff i i Flow Invert Invert Capac Line Line Line Vel Line Depth Depth Cover No. ID El Up Area Area Coeff Inlet Sys Rate Up Dn Full Size Length Slope Dn ID Dn Up Up (ft) (ac) (ac) (C) (in/hr) (in/hr) (cfs) (ft) (ft) (cfs) (in) (ft) M (ftIS) (ft) (ft) (ft) 1 DCB-1A 865,60 0,64 9,64 0,50 6.88 4,82 23,25 851,00 847,00 99.29 30 80.090 4,99 4.74 1 -OA 2.50 1,64** 12.10 2 DCB-2A 865,60 0,16 9,00 0,50 6.88 4,83 21,73 859,25 858,55 40.20 24 26,000 2.69 13.04 2-1A 1,05 1,66** 4,35 3 CB-4A 870,18 0,08 7.11 0,50 6.88 4,86 17.26 863,03 860,00 38.07 24 125,510 2.41 11.82 4-2A 0,94 1,50** 5,15 4 SDMH-6A 885,84 0,01 6.57 0,50 6.88 4,90 16.10 873,90 863,23 64,83 24 152,429 7,00 7.47 6-4A 1,30 1,45** 9,94 5 DCB-7A 893,52 0,14 0,28 0,50 6.88 6.85 0,96 886,83 879,84 23,17 15 63,740 10.97 9,28 7-6A 0,17 0,38** 5,44 6 DCB-8A 893,52 0,14 0,14 0,50 6.88 6.88 0,48 887,52 887,03 9,60 15 26,000 1,88 4,08 8-7A 0,19 0,27** 4,75 7 DCB-9A 882,11 1,05 6.28 0,50 6.88 4,95 15.54 875,80 874,10 25,54 24 156,420 1,09 7,56 9-6A 1,25 1.42** 4,31 8 DCB-10A 882,11 1,05 5,23 0,50 6.88 4,96 12.97 876,27 876,00 24,97 24 26,000 1,04 6.46 10-9A 1.22 1,29** 3,84 9 CB-11A 882,23 0,20 4,18 0,50 6.88 4,97 10.38 876,79 876,47 29,25 24 22,450 1,43 5,90 11 -1 OA 1,09 1, 15** 3,44 10 HW-13A 883,75 3,24 3,24 0,50 5,00 5,00 8,10 881,50 877,29 20,84 18 125,460 3,36 10.97 13-1 1A 0,65 1, 10** 0,75 11 CB-14A 884,13 0,62 0,74 0,50 6.88 6.82 2.52 879,02 877,54 10.36 15 67,500 2.19 6.96 14-1 1A 0,42 0,64** 3,86 12 CB-15A 884,13 0,12 0,12 0,50 6.88 6.88 0,41 879,74 879,22 9,89 15 26,000 2.00 1,08 15-14A 0,44 0,25** 3,14 13 CB-5A 870,18 0,46 0,46 0,50 6.88 6.88 1,58 864,53 863,23 15.64 15 26,000 5,00 1,29 5-4A 1,25 0,50** 4,40 14 DI-3A 867,00 1,73 1,73 0,50 6.88 6.88 5,96 861,00 860,00 11.60 15 36.370 2.75 6.19 3-2A 0,91 0,99** 4,75 15 DI-1 E 875,00 0,30 3,47 0,50 6.88 6.59 11.43 859,62 858,00 19.72 18 53.920 3,00 7,16 1 -OE 1.27 1,29** 13.88 16 CB-2E 876,53 0,19 3,17 0,50 6.88 6.64 10.53 869,30 859,82 35.85 18 95.460 9,93 7,66 2-1 E 1,09 1,25** 5,73 17 CB-5E 879,93 0,07 1.72 0,50 6.88 6.71 5,77 872,97 869,50 13.72 15 90.170 3,85 5,26 5-2E 1,05 0,97** 5,71 18 CB-6E 885,41 0,28 0,70 0,50 6.88 6.85 2.40 880,18 873,17 17.25 15 115,298 6.08 3,02 6-5E 0,77 0,62** 3,98 19 CB-7E 885,41 0,42 0,42 0,50 6.88 6.88 1,45 880,64 880,38 7,00 15 26,000 1,00 4,00 7-6E 0,42 0,48** 3,52 20 SDMH-8E 878,51 0,01 0,95 0,50 6.88 6.79 3,23 873,50 873,17 7,06 15 32.404 1,02 4,06 8-5E 0,77 0,72** 3,76 21 DCB-9E 879,20 0,59 0,94 0,50 6.88 6.84 3,22 874,29 873,70 7,00 15 59.000 1,00 5,58 ME 0,60 0,72** 3,66 22 CB-10E 879,20 0,35 0,35 0,50 6.88 6.88 1,20 874,75 874,49 7,00 15 26,000 1,00 2.48 10-9E 0,52 0,43** 3,20 23 DCB-3E 875,63 0,75 1,26 0,50 6.88 6.80 4,28 871,07 869,50 10.14 15 74.800 2.10 3,91 3-2E 1,05 0,84** 3,31 Project File: 2134 SAG,stm -F Number of lines: 51 Date: 6/15/2022 NOTES: Intensity = 97.68 1 (Inlet time + 17.10) A 0.86 -- Return period = 10 Yrs. Critical depth Storm Sewers Dschedule (10 Yr. Storm) Page 2 Line Inlet Gnd/Rim Drng Total Runoff i i Flow Invert Invert Capac Line Line Line Vel Line Depth Depth Cover No. ID El Up Area Area Coeff Inlet Sys Rate Up Dn Full Size Length Slope Dn ID Dn Up Up (ft) (ac) (ac) (C) (in/hr) (in/hr) (cfs) (ft) (ft) (cfs) (in) (ft) M (ftIS) (ft) (ft) (ft) 24 CB-4E 876,32 0,51 0,51 0,50 6.88 6.88 1,76 871,90 871,27 7,03 15 62,320 1,01 2.79 4-3E 0,64 0,53** 3,17 25 DCB-1 D 881,22 0,22 4,90 0,50 6.88 6.62 16.22 874,70 874,00 38.78 24 27,940 2.51 11.79 1 -OD 0,90 1,45** 4,52 26 CB-3D 884,21 0,39 1.41 0,50 6.88 6.70 4.72 879,04 876,51 9,89 15 126,463 2.00 7,96 3-1 D 0,61 0,88** 3,92 27 CB-4D 884,21 0,51 1,02 0,50 6.88 6.72 3,43 879,76 879,24 9,89 15 26,000 2.00 5,02 4-3D 0,68 0,75** 3,20 28 CB-8D 888,09 0,51 0,51 0,50 6.88 6.88 1,76 883,83 879,96 12.03 15 130,784 2.96 3,41 8-4D 0,55 0,53** 3,01 29 CB-5D 882,46 0,42 2.60 0,50 6.88 6.77 8,80 877,62 876,46 14.60 18 70.396 1,65 8,65 5-1 D 0,84 1, 15** 3,34 30 CB-6D 882,46 0,62 2.18 0,50 6.88 6.79 7,40 878,39 877,87 9,89 15 26,000 2.00 7,85 6-51) 0,90 1,08** 2.82 31 DI-7D 889,00 1,56 1,56 0,50 6.88 6.88 5,37 880,48 878,59 8,56 15 126,107 1,50 5,80 7-61) 0,88 0,94** 7.27 32 DCB-2D 881,22 0,67 0,67 0,50 6.88 6.88 2.31 876,77 876,51 7,00 15 26,000 1,00 5,11 2-1 D 0,49 0,61** 3,20 33 END 1 0,00 0,20 0,20 0,50 6.88 6.88 0,69 877,60 877,00 9,09 18 93.990 0,64 0,47 1 -OG 1,16 0,31** n/a 34 CB-1C 868,99 0,28 3,49 0,50 6.88 6.38 11.13 861,60 858,00 20,92 18 106,480 3,38 6.30 1 -0c 1,50 1,50 5,89 35 CB-2C 868,99 0,52 3,21 0,50 6.88 6.40 10.27 863,75 861,80 31.16 18 26,000 7,50 5,81 2-1 C 1,50 1,50 3,74 36 SDMH-3C 875,58 0,01 2.69 0,50 6.88 6.52 8,77 870,26 863,95 22,38 18 163,042 3,87 4,97 3-2C 1,50 1,50 3,82 37 CB-7C 882,77 0,46 0,93 0,50 6.88 6.80 3,16 876,65 870,51 13.26 15 170,886 3,59 2.58 7-3C 1,25 1,25 4,87 38 CB-8C 882,77 0,47 0,47 0,50 6.88 6.88 1,62 877,37 876,85 9,89 15 26,000 2.00 1,32 8-7C 1,25 1,25 4,15 39 DCB-4C 875,57 0,70 1,75 0,50 6.88 6.74 5,90 870,81 870,51 7,09 15 29,229 1,03 4,80 4-3C 1,25 1,25 3,51 40 CB-5C 876,11 0,53 1,05 0,50 6.88 6.81 3,57 871,48 871,01 7,03 15 46.596 1,01 2.91 5-4C 1,25 1,25 3,38 41 CB-6C 876,11 0,52 0,52 0,50 6.88 6.88 1,79 871,95 871,68 7,13 15 26,000 1,04 1,46 6-5C 1,25 1,25 2.91 42 CB-1 F 880,17 0,27 1.12 0,50 6.88 6.86 3,84 875,32 874,67 7,05 15 64,090 1,01 5,85 0-1 F 0,66 0,79** 3,60 43 DCB-2F 879,82 0,85 0,85 0,50 6.88 6.88 2.93 875,82 875,52 7,89 15 23,560 1.27 5,11 1-2F 0,59 0,69** 2.75 44 SDMH-1 B 868,67 0,01 4.41 0,50 6.88 6.40 14.12 856,80 856,00 34.95 24 39.330 2.03 4,50 1 -013 2.00 2.00 9,87 45 DCB-213 880,96 0,68 4,40 0,50 6.88 6.51 14.33 867,78 858,00 67,10 24 130,410 7,50 4,56 2-1 B 2.00 2.00 11.18 46 CB-613 882,64 0,09 0,50 0,50 6.88 6.79 1,70 873,13 871,02 10.65 15 91.020 2.32 1,38 6-213 1,25 1,25 8,26 Project File: 2134 SAG,stm -F Number of lines: 51 Date: 6/15/2022 NOTES: Intensity = 97.68 1 (Inlet time + 17.10) 10.86 -- Return period = 10 Yrs. Critical depth Storm Sewers Dschedule (10 Yr. Storm) Page 3 Line Inlet Gnd/Rim Drng Total Runoff i i Flow Invert Invert Capac Line Line Line Vel Line Depth Depth Cover No. ID El Up Area Area Coeff Inlet Sys Rate Up Dn Full Size Length Slope Dn ID Dn Up Up (ft) (ac) (ac) (C) (in/hr) (in/hr) (cfs) (ft) (ft) (cfs) (in) (ft) M (ftIS) (ft) (ft) (ft) 47 CB-76 882,64 0,41 0,41 0,50 6.88 6.88 1.41 873,85 873,33 9,89 15 26,000 2.00 1,15 7-613 1,25 1,25 7,54 48 DCB-36 880,96 1,01 3,22 0,50 6.88 6.75 10.87 868,67 868,28 13.93 18 26,000 1,50 6.15 3-213 1,50 1,50 10.79 49 SDIVIH-413 883,88 0,01 2.21 0,50 6.88 6.84 7,56 870,29 868,90 14.12 18 90.180 1,54 4,28 4-313 1,50 1,50 12.09 50 HW-513 871,46 2.20 2.20 0,50 6.88 6.88 7,57 871,00 870,49 13.00 18 39.060 1,31 4,29 5-413 1,50 1,50 -1.04 51 CB OE 858,00 3,48 3,48 0,50 6.88 6.88 11.98 854,20 854,00 14.50 18 12.310 1,62 6.78 0-FESOE 1,50 1,50 2.30 Project File: 2134 SAG,stm Number of lines: 51 Date: 6/15/2022 NOTES: Intensity = 97.68 1 (Inlet time + 17.10) 10.86 -- Return period = 10 Yrs. 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