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Home My WebLink AboutConveyance Calculations CommentsCONVEYANCE CALCULATION Pipe Pervious Area (acres) Impervious Area (acres) Total Area (acres) 25-year Total Flow (cfs) 100-year Total Flow (cfs) Pipe Diameter (in) Pipe Diameter (ft) Area (ft2) Wet Perimeter (ft) Hydraulic Radius (ft) Slope (ft/ft)Pipe n Capacity (cfs) Velocity @25- year Capacity (ft/sec) 25 year % Capacity (cfs) 100 year % Capacity (cfs) CB #22 to CB #18***1.76 1.74 3.50 4.75 5.55 12 1 0.785 3.142 0.250 0.044 0.013 7.49 9.54 63%74% CB #16 to CB #15 0.00 0.04 0.04 0.11 0.13 12 1 0.785 3.142 0.250 0.010 0.013 3.50 4.46 3%4% CB #15 to CB #14 0.02 0.08 0.10 0.32 0.37 12 1 0.785 3.142 0.250 0.006 0.013 2.78 3.54 12%13% CB #14 to CB #13 0.10 0.18 0.28 0.82 0.95 12 1 0.785 3.142 0.250 0.022 0.013 5.31 6.75 15%18% CB #13 to CB #12 0.00 0.00 0.00 0.82 0.95 12 1 0.785 3.142 0.250 0.075 0.013 9.76 12.43 8%10% CB #12 to Pond 0.00 0.00 0.00 0.82 0.95 12 1 0.785 3.142 0.250 0.005 0.013 2.53 3.22 32%38% CB #9 to CB #8 0.25 0.37 0.61 1.00 1.17 12 1 0.785 3.142 0.250 0.011 0.013 3.71 4.72 27%31% CB #8 to CB #7 0.09 0.04 0.12 1.09 1.28 12 1 0.785 3.142 0.250 0.050 0.013 7.96 10.13 14%16% CB #7 to CB #6 0.01 0.02 0.02 1.15 1.34 12 1 0.785 3.142 0.250 0.026 0.013 5.76 7.33 20%23% CB #11 to CB #10 0.13 0.29 0.41 0.78 0.91 12 1 0.785 3.142 0.250 0.005 0.013 2.53 3.22 31%36% CB #10 to CB #6 0.02 0.05 0.07 0.92 1.08 12 1 0.785 3.142 0.250 0.008 0.013 3.21 4.08 29%34% CB #6 to CB #1 0.06 0.12 0.18 2.40 2.80 12 1 0.785 3.142 0.250 0.130 0.013 12.88 16.40 19%22% CB #5 to CB #4 0.18 0.40 0.58 1.08 1.27 12 1 0.785 3.142 0.250 0.005 0.013 2.57 3.27 42%49% CB #4 to CB #2 0.00 0.00 0.00 1.08 1.27 12 1 0.785 3.142 0.250 0.005 0.013 2.48 3.16 44%51% CB #3 to CB #2 0.15 0.31 0.46 0.85 0.99 12 1 0.785 3.142 0.250 0.020 0.013 5.05 6.43 17%20% CB #2 to CB #1 0.06 0.11 0.17 2.24 2.61 12 1 0.785 3.142 0.250 0.006 0.013 2.77 3.52 81%94% CB #1 to Filter Vault 0.01 0.03 0.04 2.31 2.70 12 1 0.785 3.142 0.250 0.007 0.013 3.05 3.89 76%88% Filter Vault to Pond 0.00 0.00 0.00 2.31 2.70 12 1 0.785 3.142 0.250 0.088 0.011 12.55 15.98 18%22% BACKWATER CALCULATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pipe 100- year Flow (cfs) Pipe Length (ft) Pipe Diameter (in) Pipe n** I.E. Out (ft) I.E. In (ft) Pipe Area (ft) Velocity (ft/s) Velocity Head (ft/s) Tailwater Elevation (ft) Friction Loss Entrance HGL Elevation (ft) Entrance Head Loss (ft) Exit Head Loss (ft) Outlet Control Elevation (ft) Inlet Control Elevation (ft) Appr Vel Head (ft) Bend Head Loss (ft) Junction Head Loss (ft) HW Elevation (ft) Upstream CB Grate Elevation (ft) CB Grate Elev. - HW Elev. (ft) Filter Vault to Pond 2.7 42 12 0.011 449.5 453.2 0.79 3.44 0.18 458.8 0.17 458.9 0.09 0.18 459.2 454.3 0.18 0.24 0.00 459.3 463.0 3.7 CB #1 to Filter Vault 2.7 26 12 0.011 456.7 456.9 0.79 3.44 0.18 458.8 0.11 458.9 0.09 0.18 459.1 458.0 0.17 0.22 0.00 459.2 466.8 7.7 CB #2 to CB #1 2.6 70 12 0.011 456.9 457.3 0.79 3.33 0.17 459.2 0.27 459.4 0.09 0.17 459.7 458.4 0.04 0.05 0.07 459.6 462.7 3.0 CB #3 to CB #2 1.0 17 12 0.011 457.3 457.7 0.79 1.26 0.02 459.6 0.01 459.7 0.01 0.02 459.7 458.4 0.00 0.00 0.00 459.7 462.7 3.0 CB #4 to CB #2 1.3 31 12 0.011 457.3 457.5 0.79 1.61 0.04 459.7 0.03 459.7 0.02 0.04 459.8 458.2 0.04 0.05 0.00 459.8 461.7 1.9 CB #5 to CB #4 1.3 31 12 0.011 457.5 457.6 0.79 1.61 0.04 459.8 0.03 459.8 0.02 0.04 459.9 458.4 0.00 0.00 0.00 459.8 461.1 1.3 CB #6 to CB #1 2.8 70 12 0.011 456.9 466.0 0.79 3.57 0.20 459.6 0.31 459.9 0.10 0.20 460.2 467.1 0.05 0.06 0.08 467.1 471.0 3.9 CB #10 to CB #6 1.1 31 12 0.011 466.0 466.3 0.79 1.37 0.03 467.1 0.02 467.1 0.01 0.03 467.1 467.0 0.02 0.03 0.00 467.1 471.3 4.1 CB #11 to CB #10 0.9 32 12 0.011 466.3 466.4 0.79 1.16 0.02 467.1 0.01 467.1 0.01 0.02 467.2 467.1 0.00 0.00 0.00 467.1 471.3 4.1 CB #7 to CB #6 1.3 100 12 0.011 466.0 468.6 0.79 1.70 0.05 467.1 0.10 467.2 0.02 0.05 467.2 469.4 0.04 0.05 0.00 469.4 473.6 4.2 CB #8 to CB #7 1.3 77 12 0.011 468.6 472.4 0.79 1.63 0.04 469.4 0.07 469.5 0.02 0.04 469.5 473.2 0.03 0.04 0.00 473.2 475.9 2.7 CB #9 to CB #8 1.2 26 12 0.011 472.4 472.7 0.79 1.48 0.03 473.2 0.02 473.2 0.02 0.03 473.2 473.5 0.00 0.00 0.00 473.4 476.2 2.8 CB #12 to Pond 1.0 20 12 0.011 449.5 449.6 0.79 1.22 0.02 458.8 0.01 458.8 0.01 0.02 458.8 450.3 0.02 0.03 0.00 458.8 454.4 -4.4* CB #13 to CB #12 1.0 58 12 0.011 449.6 453.9 0.79 1.22 0.02 458.8 0.03 458.8 0.01 0.02 458.9 454.6 0.02 0.03 0.00 458.9 461.9 3.0 CB #14 to CB #13 1.0 73 12 0.011 456.8 458.4 0.79 1.22 0.02 458.9 0.04 458.9 0.01 0.02 458.9 459.1 0.00 0.00 0.00 459.1 465.8 6.7 CB #15 to CB #14 0.4 28 12 0.011 458.4 458.6 0.79 0.48 0.00 459.1 0.00 459.1 0.00 0.00 459.1 459.2 0.00 0.00 0.00 459.2 463.6 4.3 CB #16 to CB #15 0.1 25 12 0.011 458.6 458.8 0.79 0.16 0.00 459.2 0.00 459.2 0.00 0.00 459.2 459.5 0.00 0.00 0.00 459.5 463.8 4.3 CB #22 to CB #18***5.6 298 12 0.011 449.2 462.3 0.79 7.07 0.78 450.3 5.13 455.4 0.39 0.78 456.6 465.0 0.00 0.00 0.00 464.2 464.2 0.0 *The rim elevation of this CB will be located in the detention pond and will be below the top of live storage. **The Manning's n used in Backwater analysis differs from the Conveyance analysis per 2009 KCSWDM, Section 4.2, Table 4.2.1.D. ***The pipe that will convey the existing upstream offsite flows to the existing downstream piped conveyance system. CHECK THESE ROWS (TYP) TEXT MISSING ON THIS SHEET (TYP) SHOW CALCULATIONS FROM CB #18 TO CB #17