Laserfiche WebLink
<br /> May 2025 3 City of Pleasanton <br />5859 Owens Drive <br />Fire Flow Analysis <br /> <br />ANALYSIS RESULTS <br />FH (30400015 @ ROW, 10-inch main) <br />o Scenario 1: The distribution system at the hydrant location has a static pressure <br />of 63.6 psi during maximum day demands, under no fire flow stressors. <br />o Scenario 2: The distribution system at the hydrant location can satisfy the fire <br />flow requirement of 2,500 gpm for 2 hours while maintaining a residual pressure <br />of 52.5 psi which is above the minimum pressure constraint of 20.0 psi. <br />o Scenario 3: The distribution system at the hydrant location can produce a <br />maximum fire flow of 5,408 gpm while maintaining the pressure constraint of 20.0 <br />psi. <br />o Scenario 4: The distribution system at the hydrant location can only produce a <br />maximum fire flow of 2,447 gpm while adhering to both the pressure constraint of <br />20.0 psi and the velocity constraint of 10.0 ft/s. <br />o The fire flow analysis results are documented in Table 1. <br /> <br />Table 1: Fire Hydrant – 30400015 @ ROW, 10-inch main <br /> <br />Scenario Type Flow <br />(gpm) <br />Residual <br />Pressure (psi) <br />1 Static 0 63.6 <br />2 Design Fire Flow <br />(City Criteria) 2,500 52.5 <br />3 Under Pressure <br />Constraint 5,408 20.0 <br />4 <br />Under Pressure <br />and Velocity <br />Constraint <br />2,447 52.9 <br /> <br />Note: <br />Hydrant elevation of 333 ft. <br />