3003 W CASINO RD BOEING STORMWATER MGT SYSTEM 2023-12-28

Kennedy/Jenks Consultants Boeing Everett Site Stormwater Upgrades Sanitary Sewer Reroute Flow Calculations 05 March 2021 Boeing EVT SW - SS Pipeline Reroute Project Description Friction Method Manning Formula Solve For Normal Depth Input Data Roughness Coefficient 0.016 Channel Slope 0.005 ft/ft Diameter 24.0 in Discharge 10.00 cfs Results Normal Depth 15.8 in Flow Area 2.2 ft2 Flow logging data for discharges from the Wetted Perimeter 3.8 ft 40-09 building indicate the existing sanitary Hydraulic Radius 7.0 in sewer conveyed up to a maximum of Top Width 1.90 ft Critical Depth 13.6 in approximately 3.7 CFS in 2019. Percent Full 65.8% Critical Slope 0.008 ft/ft For design purposes, these calculations Velocity 4.56 ft/s assume a maximum flow of 10 CFS and a Velocity Head 0.32 ft pipe slope of 0.005 ft/ft. Assuming the Specific Energy 1.64 ft reported flow logging data provides a Froude Number 0.748 p ggIg Maximum Discharge 13.98 cfs realistic estimate of anticipated peak flows, Discharge Full 13.00 cfs a 24" pipe with a minimum slope of 0.005 Slope Full 0.003 ft/ft ft/ft will provide sufficient capacity. Flow Type Subcritical GVF Input Data Downstream Depth 0.0 in Length 0.0 ft Number Of Steps 0 GVF Output Data Upstream Depth 0.0 in Profile Description N/A Profile Headloss 0.00 ft Average End Depth Over Rise 0.0 % Normal Depth Over Rise 0.0 % Downstream Velocity 0.00 ft/s Upstream Velocity 0.00 ft/s Normal Depth 15.8 in Critical Depth 13.6 in Channel Slope 0.005 ft/ft Critical Slope 0.008 ft/ft Bentley Systems,Inc. Haestad Methods Solution FlowMaster Untitled 1.fm8 Center [10.02.00.01] 2/5/2021 27 Siemon Company Drive Suite 200 W Page 1 of 1 Watertown,CT 06795 USA +1-203-755-1666