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HomeMy WebLinkAboutTract 6577 - Additional Drainage from Tract 7041CITY OF BAKERSFIELD RATIONAL METHOD (In accordance with City of Bakersfield Standards) TABLE OF RUNOFF COEFFICIENTS R-1, 6000 SF 0.42 JOB TITLE:Tract 6577 (Units 1-5)R-1, 6750 SF 0.4 DATE:Mar-22 R-1, 7500 SF 0.38 R-1, 10000 SF 0.34 Rational Values:R-1, 15000 SF 0.27 Event: 10 YEAR Values: 5, 10, 50 R-3, R-4, M-H 0.8 M.A.P. 6 in./yr. Values: 6, 10, 15, 20, 25, 30 Commercial 0.9 Industrial 0.8 Curve Values Parks 0.15 a: 2.38 I=a+bTc (Tc<20min.) Grasslands, Type A Soil 0.15 b: -0.058 Grasslands, Type B Soil 0.25 P60: 0.550 I=K1*(6.02*Tc)^(0.17*LN(p60/K1) Grasslands, Type C Soil 0.35 K1: 40.00 (Tc>=20min.) Grasslands, Type D Soil 0.45 Pavement, drives & roofs 0.95 Backyards 0.05 Lawn-landscape 2% slope 0.10 0.17 Lawn-landscape 2-7% slope 0.15 0.22 Lawn-landscape 7% slope 0.20 0.35 SUBAREA C I A rslt Tc L dH Sg Q V Trial Tc Roof to Tm Inlet Curb NAME Runoff Intensity Total Time Length Elev. Gutter Flow Vel. MIN. Gutter Travel Size Cap Coef. IN/HR Area Conc. Feet Diff. Slope CFS FPS Time Time Feet In AC. MIN. Feet Ft/Ft MIN. MIN. AREA 1 0.49 1.12 4.63 22.34 775 1.49 0.19% 2.53 1.76 22.34 15 7.34 4.29 PIPES 11 - 13 752.98 2.53 1.43 8.76 18 31.10 AREA 2 0.38 1.08 6.26 23.56 994 2.93 0.29% 2.57 1.94 23.56 15 8.56 4.23 PIPE 18 15.00 2.57 1.46 0.17 18 23.73 CONFLUENCE AT MH-3 / PIPE 10 0.43 0.88 10.89 192.75 4.09 2.32 31.10 1.39 18 32.48 AREA 3 0.55 1.12 5.43 22.49 819 2.13 0.26% 3.33 1.82 22.49 15 7.49 4.61 PIPES 19 - 20 67.75 3.33 1.88 0.60 18 23.09 CONFLUENCE AT MH-5 / PIPE 9 0.47 0.86 16.32 137.29 6.51 3.68 32.48 0.62 18 33.11 AREA 4 0.38 1.10 6.27 22.91 1056 3.99 0.38% 2.63 2.22 22.91 15 7.91 4.12 PIPE 21 41.24 2.63 1.49 0.46 18 23.37 CONFLUENCE AT MH-6 / PIPE 7 - 8 0.44 0.84 22.59 559.77 8.43 4.77 33.11 1.96 18 35.06 AREA 5 0.38 1.41 0.97 16.62 127 0.32 0.25% 0.52 1.31 16.62 15 1.62 2.76 PIPES 14 - 17 911.15 0.52 0.30 51.46 18 68.08 Tc CALCULATIONS Tract 6577 (Units 1-5) REV Hydrology_10_yr.xls McIntosh Associates 2001 Wheelan Ct Bakersfield, CA 93309 10 yr Calc REVISED SUBAREA C I A rslt Tc L dH Sg Q V Trial Tc Roof to Tm Inlet Curb NAME Runoff Intensity Total Time Length Elev. Gutter Flow Vel. MIN. Gutter Travel Size Cap Coef. IN/HR Area Conc. Feet Diff. Slope CFS FPS Time Time Feet In AC. MIN. Feet Ft/Ft MIN. MIN. Tract 6577 (Units 1-5) AREA 6 0.38 1.03 6.27 25.27 1246 4.58 0.37% 2.45 2.02 25.27 15 10.27 4.09 PIPE 22 25.17 2.45 1.39 0.30 18 25.57 CONFLUENCE AT MH-11 / PIPE 6 0.43 0.81 29.83 42.75 10.31 5.84 35.06 0.12 18 35.18 AREA 7 0.38 1.21 6.71 20.10 750 4.59 0.61% 3.10 2.45 20.10 15 5.10 4.17 PIPE 23 25.00 3.10 1.75 0.24 18 20.34 AREA 8 0.40 1.28 3.12 18.95 447 1.66 0.37% 1.59 1.89 18.95 15 3.95 3.55 PIPE 24 15.00 1.59 0.90 0.28 18 19.23 CONFLUENCE AT MH-12 / PIPES 3-5 0.42 0.81 39.66 764.31 13.35 7.55 35.18 1.69 18 36.87 AREA 9 0.38 1.27 3.50 19.06 447 1.23 0.28% 1.69 1.83 19.06 15 4.06 3.78 PIPE 27 28.28 1.69 0.96 0.49 18 19.55 CONFLUENCE AT MH-15 / PIPE 2 0.41 0.78 43.16 42.43 13.94 7.89 36.87 0.09 18 36.96 AREA 10 0.38 1.16 3.12 21.37 706 2.64 0.37% 1.38 1.85 21.37 15 6.37 3.39 PIPES 25-26 325.59 1.38 0.78 6.97 18 28.34 AREA 11 0.38 1.06 6.27 24.12 1057 2.93 0.28% 2.53 1.93 24.12 15 9.12 4.22 PIPE 28 37.64 2.53 1.43 0.44 18 24.56 CONFLUENCE AT MH-16 / PIPE 1 0.41 0.78 52.55 84.37 16.69 9.45 36.96 0.15 18 37.11 AREA 12 0.85 1.79 2.06 10.18 1103 2.31 0.21% 3.13 1.81 10.18 0 10.18 4.53 Required Sump Capacity = 0.15 x C x A = 3.48 ac-ft C = 0.42 A= 54.61 acres REV Hydrology_10_yr.xls McIntosh Associates 2001 Wheelan Ct Bakersfield, CA 93309 10 yr Calc Inlet Report Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc.Thursday, Aug 11 2016 Catch Basin #1 - Drainage Area 1 - REV2 Curb Inlet Location = Sag Curb Length (ft) = 3.50 Throat Height (in) = 4.50 Grate Area (sqft) = -0- Grate Width (ft) = -0- Grate Length (ft) = -0- Gutter Slope, Sw (ft/ft) = 0.020 Slope, Sx (ft/ft) = 0.083 Local Depr (in) = 2.00 Gutter Width (ft) = 2.00 Gutter Slope (%) = -0- Gutter n-value = -0- Calculations Compute by: Known Q Q (cfs) = 2.537 Highlighted Q Total (cfs) = 2.537 Q Capt (cfs) = 2.537 Q Bypass (cfs) = -0- Depth at Inlet (in) = 5.450 Efficiency (%) = 100 Gutter Spread (ft) = 5.003 Gutter Vel (ft/s) = -0- Bypass Spread (ft) = -0- Bypass Depth (in) = -0- TRACT 6577HYDRAULIC CALCULATIONS (OUTPUT)Pipe Pipe Pipe Flow Avg. Capacity Invert HGL Velocity Velocity EGLSfInvertNo. Length Size Rate Velocity Flowing Full Down Down DownHead DownDown Down Up(ft)(in)(cfs) (ft/s) (cfs) (ft) (ft) (ft/s) (ft) (ft) (%) (ft)184.37 30 16.693.77 57.35 325.50 329.00 3.40 0.18 329.18 0.166 327.15242.43 24 13.944.46 7.77 327.15 329.32 4.46 0.31 329.63 0.383 327.203280.00 24 13.354.25 7.40 327.20 329.72 4.25 0.28 330.00 0.349 327.504237.06 24 13.354.58 18.58 328.50 330.97 4.25 0.28 331.25 0.349 330.105247.25 24 13.354.32 13.65 330.10 332.09 4.25 0.28 332.37 0.329 331.00642.75 24 10.313.28 7.73 331.00 333.15 3.28 0.17 333.32 0.207 331.057237.06 18 8.434.78 8.76 331.05 333.41 4.78 0.36 333.76 0.648 332.708322.71 18 8.434.78 7.16 332.70 335.30 4.78 0.36 335.65 0.648 334.209137.29 18 6.513.68 4.20 334.20 337.74 3.68 0.21 337.96 0.383 334.4210192.75 18 4.092.32 3.47 335.13 338.48 2.32 0.08 338.57 0.153 335.3411257.31 18 2.531.43 6.07 335.34 338.86 1.43 0.03 338.89 0.058 336.2012451.21 18 2.531.43 3.67 336.20 339.04 1.43 0.03 339.07 0.058 336.751344.45 18 2.531.43 7.88 336.75 339.32 1.43 0.03 339.35 0.058 337.0014336.47 18 0.520.29 3.43 331.05 333.41 0.29 0.00 333.41 0.002 331.4115326.47 18 0.520.29 3.44 331.41 333.42 0.29 0.00 333.42 0.002 331.7616222.80 18 0.520.30 3.45 331.76 333.43 0.29 0.00 333.43 0.002 332.001725.42 18 0.524.54 46.95 332.00 333.43 0.30 1.20 334.63 0 337.081815.00 18 2.571.45 3.83 335.34 338.86 1.45 0.03 338.89 0.06 335.361952.75 18 3.331.88 3.54 334.42 338.48 1.88 0.06 338.54 0.101 334.482015.00 18 3.331.88 3.83 334.48 338.59 1.88 0.06 338.64 0.101 334.502141.24 18 2.631.49 3.66 334.20 337.74 1.49 0.03 337.78 0.063 334.252225.17 18 2.452.58 27.29 331.05 333.41 1.39 0.03 333.44 0.054 332.752325.00 18 3.102.91 27.78 331.00 333.15 1.75 0.05 333.20 0.087 332.752415.00 18 1.592.12 35.87 331.00 333.15 0.91 0.01 333.17 0.023 332.7525281.14 18 1.380.87 3.49 327.89 329.32 0.79 0.01 329.33 0.015 328.202644.45 18 1.385.13 33.60 328.20 329.38 0.93 1.35 330.73 0 332.752728.28 18 1.692.17 31.47 327.96 329.72 0.96 0.01 329.73 0.026 330.502837.64 18 2.536.19 32.43 327.91 329.32 1.47 1.85 331.17 0 331.50Tract 6577 (Units 1-5) TRACT 6577HYDRAULIC CALCULATIONS (OUTPUT)Pipe HGL Grnd/Rim Cover Velocity Velocity EGLSfSfEnergy J-Loss MinorNo. Up Elev. Up Up Up Head Up Up Up Avg. Loss Coeff Loss(ft)(ft)(ft)(ft/s)(ft)(ft)(%)(%)(ft)(ft)1 329.06 336.88 7.23 4.14 0.27 329.33 0.19 0.178 0.15 0.96 0.262 329.48 336.85 7.65 4.46 0.31 329.79 0.383 0.383 0.163 0.76 0.233 330.69 337.67 8.17 4.25 0.28 330.97 0.348 0.348 0.976 1 0.284 331.72 338.21 6.11 4.91 0.37 332.09 0.358 0.353 0.837 1 0.375 332.85 337.51 4.51 4.40 0.30 333.15 0.302 0.315 0.78 1 0.36 333.24 337.60 4.55 3.28 0.17 333.41 0.207 0.207 0.089 1 0.177 334.94 338.21 4.01 4.78 0.36 335.30 0.648 0.648 1.535 1 0.368 337.39 339.05 3.35 4.78 0.36 337.74 0.648 0.648 2.09 1 0.369 338.27 340.12 4.20 3.68 0.21 338.48 0.383 0.383 0.526 1 0.2110 338.78 340.33 3.49 2.32 0.08 338.86 0.152 0.152 0.294 1 0.0811 339.01 340.94 3.24 1.43 0.03 339.04 0.058 0.058 0.149 1 0.0312 339.30 341.82 3.57 1.43 0.03 339.33 0.058 0.058 0.262 0.44 0.0113 339.34 341.66 3.16 1.43 0.03 339.37 0.058 0.058 0.026 1 0.0314 333.42 339.73 6.82 0.29 0.00 333.42 0.002 0.002 0.008 0.15 015 333.42 341.67 8.41 0.29 0.00 333.43 0.002 0.002 0.008 1 016 333.43 342.48 8.98 0.30 0.00 333.43 0.002 0.002 0.005 1 017 337.19 j 342.31 3.73 8.78 1.20 338.39 0 0 0 1.00 z n/a18 338.87 339.76 2.90 1.45 0.03 338.90 0.06 0.06 0.009 1 0.0319 338.53 339.41 3.43 1.88 0.06 338.59 0.101 0.101 0.053 1 0.0620 338.60 339.14 3.14 1.88 0.06 338.66 0.101 0.101 0.015 1 0.0621 337.77 338.77 3.02 1.49 0.03 337.81 0.063 0.063 0.026 1 0.0322 333.34 337.42 3.17 3.78 0.22 333.56 0.504 0.279 0.07 1.00 z 0.2223 333.42 j 337.34 3.09 4.06 0.26 333.68 0.518 0.302 0.076 1.00 z n/a24 333.22 337.34 3.09 3.33 0.17 333.40 0.493 0.258 0.039 1.00 z n/a25 329.36 337.75 8.05 0.94 0.01 329.38 0.019 0.017 0.048 0.94 0.0126 332.96 j 337.54 3.29 9.33 1.35 334.31 0 0 0 1.00 z n/a27 330.99 j 336.55 4.55 3.38 0.18 331.17 0.493 0.259 0.073 1.00 z n/a28331.78 j336.603.6010.901.85333.630001.00 zn/aNotes: j-Line contains hyd. Jump z-Zero Junction LossTract 6577 (Units 1-5) TRACT 6577 BASIN SIZING CALCULATIONS Provided Sump Capacity Freeboard (ft)=1 Lowest Inlet Elev = 334.0 Water Surface Elev =333.0 Bottom Basin Elev = 325.0 Depth from Design Water Surface =8 feet Abtm =Bottom Area of Sump 14,725 sq ft =0.34 acres Amid =Half Depth Area of Sump 19,253 sq ft =0.44 acres Atop =Area of Design Water Level 24,242 sq ft =0.56 acres Prismoidal Formula: Volume = 1/6 x(Abtm+4Amid+Atop) x D Volume = 1/6 x (0.34+1.77+0.56) x 8.0 = 1/6 x (2.66) x 8.0 Provided Sump Capacity =154,639 Cu. FT 3.55 AC-FT Required Sump Capacity TABLE OF RUNOFF COEFFICIENTS UNITS 1-5 C x A = R-1, 6000 SF 0.42 R-1, 6750 SF 0.4 R-1, 7500 SF 0.38 49.44 18.79 R-1, 10000 SF 0.34 R-1, 15000 SF 0.27 R-2 0.55 R-3, R-4, M-H 0.8 Commercial 0.9 Industrial 0.8 Parks 0.15 Grasslands, Type A Soil 0.15 Grasslands, Type B Soil 0.25 Grasslands, Type C Soil 0.35 Grasslands, Type D Soil 0.45 Pavement, drives & roofs 0.95 4.85 4.61 Backyards 0.05 Lawn-landscape 2% slope 0.17 Lawn-landscape 2-7% slope 0.22 Lawn-landscape 7% slope 0.35 n C x A =23.39 UNITS 1-5 Total 54.29 =Acres 54.29 Required Sump Capacity = 0.15 x C x A =0.15 X n C x A =3.51 AC-FT Total Difference of 0.04 AC-FT AC-FT TRACT 6577 BASIN SIZING CALCULATIONS UNITS 1-5 0.85 5.17 4.39 23.18 54.6154.61 3.48 0.07 Know what's R 2REFER TO SHEET 2 FOR DRAINAGE EXHIBITADDITIONAL 0.32 AC ADDITIONAL 0.32 AC 4.31 + 0.32 = 4.63 AC 7 0 4 1 7 0 4 1