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SE~CA©4 far W"rndaws <br />f „n,.inh„OtlH Pa.rtn7a ~ S.•h,ual~ <br />i3 <br />Pond Inputs: <br />Initial Pool Elev: 6,830.E <br />Initial Pooi: 5.48 ac-ft <br />*Sediment Storage: <br />~ 0.00 ac ft <br />Dead Space: 20.00 °!a <br />*No sediment capacity defrned <br />Emergency Spillway <br />Spillway Elev Crest ler~th Left Right Bottom <br />{ft} Sfidesiope Sidestope Width (ft} <br />6,838.00 21.00 1.50:1 1.50:1 24.00 <br />Perforated Riser <br />Riser Riser Height <br />Diameter Barrel Barrel Barre{ Slope <br />Diameter Number of <br />Manning's n Spillway Elev HaEes per <br />(~} <br />(in} Lengttl(ft) ~~} <br />(in} <br />18.00 11.60 18.00 173.00 8.74 0.0250 6,837.00 3 <br />r~ <br />~J <br />Pond Results: <br />Peak Elevation: 6,831.73 <br />H'graph Detention Time; 8.70 hrs <br />Pond Model: GSTRS <br />. <br />Dewater Time: 0.89' days <br />Trap Efficiency: 88.34 °/a <br />Uewatering time is calculated from peak stage ha lowest spillway <br />Elevation-Capacity-Discharcae T_ahle <br /> <br />Elevation Area... <br /> <br />(ac) Capacity <br /> <br />(ac-ff} Di~harge Dewater <br />Time <br />(~) (hrs) <br />6,821.00 0.131 0.000 0.000 ~ Top of Sed. Storage , <br />__. - <br />6,821.50 -- <br />0.275 <br />0.099 <br />0.000 <br />6,822.00 0.474 0.284 0.000 _.. <br />6,822.50 w 0.499 0.527 0.000. _- <br />6,823.00 o.52s 0.7s3 0.000 <br />~ <br />6,823.Sp 0.545 1.051 0.000 <br />~__ <br />_.. <br />6,824.00 _.~. <br />0.564 <br />1.328 <br />0.000 <br />6,824.50 0.584 1.615 0.000 <br />5,825.00 0.604 1.912 0.000 <br />6,825.40 0.620 2.157 ~ 0.000 <br /> <br />Filename: Westpit~l0yr_24hr.sc4 <br />Printed 01-27-2006 <br />Exh. 7-WP-31 Revision Date: 2/1/06 <br />Revision No.: TR-63 <br />