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`'JL;JL;III <br />JVA, Incorporated <br />1319 Spruce Street <br />Boulder, CO 80302 <br />Ph: 303.444.1951 <br />Fax: 303.444.1957 <br />Job Name: Louisville Mill Site <br />500,540 and 544 County Rd, Louisville CO <br />Job Number: 2221c <br />Date: 8/20/2014 <br />By: DNS <br />4. Hydrodynamic Loading <br />This is the force exerted on vertical surfaces exposed to moving floodwaters. The determination of <br />hydrodynamic force is based on the expected velocity of the floodwaters with depths to the <br />floodproofing design level (BFE or higher). <br />Fd = Cd *m *1 /2 *V2 *A (Per FEMA 3 -93) <br />where: Fd = The lateral force due to hydrodynamic pressure <br />Cd = The drag coefficient <br />m = The mass density of water <br />V = The velocity of the water (ft/sec) <br />A = The area of the wall affected (ft2) <br />Solving for Pressure: <br />Pd = Cd *m *1/2 *V2 <br />where: <br />Pd = Hydrodynamic pressure (Ibs/ft2) <br />Drag Coefficient <br />Mass Density of Water <br />Velocity of the Water <br />Hydrodynamic Pressure <br />Fd = Pd *A <br />Maximum adjacent 100 -Year Water Elevation: <br />Maximum Flood Protection Elevation: <br />Lowest Adjacent Grade: <br />Height of Standing Water <br />Hydrodynamic Force <br />Cd = <br />m= <br />V= <br />1.25 <br />1.94 slugs/ft3 <br />2.0 ft/sec <br />Pd = 4.9 Ibs /ft2 <br />5333.00 <br />5334.00 <br />- 5330.50 <br />3.5 <br />H= <br />Fd = 17.0 Ibs /ft <br />(Assumed) <br />(from FEMA Floodplain <br />Map) <br />100 -Year WSE + 1' <br />(From site survey) <br />