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Table TR-91-31-1 (cont.) <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 />o (cte) <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 = 3.41 <br />. Elevation of Event 6,826.5 <br />Top of Riser <br />b,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 />Ex. 29-6 <br />