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Goldfinch Brothers <br /> Drainage Study <br /> August 27,2008 <br /> 4. SITE HYDRAULIC ANALYSIS <br /> 111 REQUIRED VOLUME= 132%X 6,056 = 7,962 CF <br /> VAULT = 4' ' ' =8,320 CF <br /> DETENTIONSIZE DEEP SIZING X40 CALCUX52LATION: VAULT OPTION <br /> Total required live storage within the pipe <br /> Calculated Q100 storage=6,056 CF <br /> Required Q100 storage=6,056 CF * 1.32% = 8,320 CF <br /> Design Vault=40' * 39' *4 ' Deep = 6,240 CF <br /> g <br /> Constructed Vault= 52 * 40'* 4.0 = 8,320 CF <br /> Dead Storage Available/ 1-Foot = 2,080 CF <br /> Developed WQ Volume at(D= 1.55') = 3,224 CF <br /> Available Volumes (To Be Constructed) : <br /> LIVE provided= 52' * 40' * 4' = 8,320 CF <br /> DEAD provided= 52 * 40'* 1.55' Mean = 3,224 CF <br /> TOTAL PROVIDED = 11,544 CF <br /> Restriction Device Design <br /> MULTIPLE ORIFICE ID No. R01v <br /> Description: <br /> Outlet Elev: 535.00 <br /> Elev: 533.00 ft Orifice Diameter: 0.5680 in. <br /> Elev: 538.20 ft Orifice 2 Diameter: 2.4844 in. <br /> • <br /> Emergency Overflow <br /> RISER DISCHARGE ID NO. RO4V <br /> DESCRIPTION: <br /> RISER DIAMETER(IN): 12.00 ELEV: 538.90 FT <br /> WEIR COEFFICIENT...: 9.739 HEIGHT: 539.90 FT <br /> ORIF COEFFICIENT...: 3.782 INCREM: 0.10 FT <br /> The standard 12"-Riser/Standpipe will be provided in the new restrictor as an <br /> emergency release point. According to Waterworks printout for a 12" standpipe <br /> in the printout pages (at relative El = 538.9), a Q100 (dev) = 0.75 cfs flow will <br /> overflow the riser at less than elevation El =539.1 at a spillway depth of less than <br /> 0.20 feet and will flow safely to the downstream channel, if the orifices are <br /> plugged. <br /> I <br /> I <br /> 1 7 <br />