7000 HARDESON RD 2020-06-05 - Laserfiche WebLink

MCOB, PHASE II Calculation: C-4 Overflow Pipe Design Page 3 of 3 CB 5: l0yr flow into Flow Splitter(from calculation C-3)= 19.16-8.74(overflowed at CB6)= 10.42 cfs Full Flow Capacity of pipe continuing to water quality(from calculation C-3)=2.10 cfs Required Capacity of Outfall Pipe= 10.42-2.10=8.32 cfs Pipe Size= 18" Critical Slope=0.54% Provided Slope=0.56% CB 4: l0yr flow into Flow Splitter(from calculation C-3)=25.17- 8.74 -8.32=8.11 cfs Full Flow Capacity of pipe continuing to water quality(from calculation C-3)=2.07 cfs Required Capacity of Outfall Pipe=8.11 -2.07=6.04 cfs Pipe Size= 12" Critical Slope=2.48% Provided Slope=2.51% CB3: l0yr flow into Flow Splitter(from calculation C-3) =30.53 -8.74-8.32-6.04=7.43 cfs Full Flow Capacity of pipe continuing to water quality(from calculation C-3) =2.10 cfs Required Capacity of Outfall Pipe=7.43 -2.10=5.33 cfs Pipe Size= 12" Critical Slope= 1.93% Provided Slope=4.82% CB 2: l0yr flow into Flow Splitter(from calculation C-3)=33.75-8.74-8.32-6.04-5.33 =5.32 cfs Full Flow Capacity of pipe continuing to water quality(from calculation C-3)= 1.46 cfs Required Capacity of Outfall Pipe=5.32-1.46=3.86 cfs Pipe Size= 12" Critical Slope= 1.01 % Provided Slope=6.35%