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Table TR-86-2-2 <br />• <br />SEDIMENTATION POND •F• - OUTLET WORKS DESIGN <br />• <br />Combined Riser Set-up. Stage - Discharge. <br />Top of Riser Elevation 6,826.5 <br />Center Elevation - Set ~1 Orifice's 6,825.0 <br />Center Elevation - Set #2 Orifice's 6,823.0 <br />Maximum Allowable Head 3.5 feet <br />Steady State Spring Flow 3.34 cfs <br />(Hi-Flow case with 1,500 gpm) <br />Steady State Pond Elevation = 3.34 cfs discharge through Orifices. <br />(without/prior to 10 Year - 24 Hour Event) <br />4.C <br />3.C <br />0 (cis) <br />20 <br />~.o <br /> <br />1.0 ZD 3.0 4.0 SO <br />H(FEET) <br />10 Year Event - Check (with Spring Flow Level at 6,825.5) <br />10 Year Event - Plus 0.5 ft of Spring Storage above 6,325.0 Elevation <br />(ac-ft) 2.33 + 1.14 = 3.47 <br />Elevation of Event 6,826.5 <br />Top of Riser 6,826.5 <br />Detention Time of ( 10 Year- 24 Hour Event only (Spring Flow at Steady State) <br />(At average head of 0.75 ft). q = 1.21 cfs 35 hrs. <br /> <br />