Storm Water Drainage Analysis for Harris County (Crosby, TX) Ian Barry, Travis Christo, Bethany Schomin, Paul Swope, William Weidman

Preexisting conditions Elevation Low elevations Slope of 0.1% Creek on SE side of the development Driving force is gravity Undeveloped land Land will need to be cleared CN=84

Hydraulics 2-year, 24-hour storm • Soil classification = D Pd = 4.2inches • Area = 45.3 acres Type III SCS curve

Storm Water Management Model (SWMM) Insert default parameters Apply backdrop and plot drainage areas/junctions accordingly Connect with pipes Assign pipe lengths and diameters, and junction elevations Assign rain gage data Run and adjust until requirements are met

Results Requirements Pipe Velocity: 3 – 8 feet per second Inlet Flows can’t exceed inlet capacity Water elevation can’t exceed HGL

Proposal Needs 5,270 ft of concrete pipe Ranging from 6 to 8 inches 34 10-foot curb-on-grade inlets With stand max flow of 4 cfs 34 sub-catchments 23 junctions 23 manhole covers 20 junction boxes Clearing and grubbing

Cost Analysis

Cost Analysis

Thank You Any questions?