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Reservr_~ir Lial_lid Volume <br />• Voitllrle cif surface rurl~~fr (V'.:R) = I"! _ X A,j / 1~ irl/t't <br />iv <br />V'-F`1C1 = r_1.1t~ X ~./-, acres / 1~in/ft <br />i~I = - 9LC.l <br />_. cubic feet. <br />Ilse `:%'~R X ~ for V~~il!me = 7,S~G cut~ic feet <br />M(vii) - <br />IIIL SC'dlrrlt rl~i ltil:~rl r'e=er'volr' :11`111 li~rlt Zlrl twi[e Mlle t!~t 11 v~!l urtle <br />oi' flaw from a 10 yr - ~4 tlr precipitation e=vent above the ir'llet <br />of the primary spillway. After st~~rrtl events fi~l l the pond abc~•re <br />the primary spillway the operator will stare the water urltil <br />water quality sartl[1lirlq determines that trle water aua~li~ty will meet <br />or~~ Cr:ceed ri;quired Dar=~Rr~tcr's. TI"le Water wi~l i tl~len be dischara_ed <br />t~y c~penlnq the elate valve on the. inlet erld ..f the pipe. <br />Ai. the request of the division, the prima:-y spillway Flas also been <br />designed t.. discharge tt~u3 rolync~ff generated t~v ~ 1i~yr - ~1flr event <br />~~vcr a period longer tharl ~4 h~~l_Irs with the addition of a flr~w- <br />cc~ntrc~l orifice. The flew contrr,l orifice can be attached to the <br />discharge pipe. to allow unattended opc^ati~~n c.f the pored. <br />F'~.im.=r,:~ '_;pil lwaY De=i.gn <br />• Llevelop a runoff hydrogra.pF, and fir~n,j rr~l,lting [Hart to be used <br />W1th a detention time [Platt to determine deterltic~n time. The <br />LY13rt5 ar'e shi~Wrl {in 7tIC rle~~a trlree pages and lrldlC~ite ttl3t art <br />orifice diameter a1` 0._~~> inches will yield an average de±entian <br />t ime of ~_.51 I-lol~rs. <br />The flrw car,trot devici: will be designed tcl tie easily ~~ttached to <br />the invert of the discharge device and mill incc~rparate a device <br />to prevent the orifice from becoming clc++aged wit hl trash. A sketch <br />cif the device is Shown below. <br />TOP VIEW SECTION - A-A' <br />A <br />f <br /> <br /> <br />screen top & bottom <br />;x; inch openings <br />support bracket 16" dia, pipe-- <br />0. 8" dia. orifice in <br />;" steel plate <br />A, slip fit over CMP i 'I <br />8" CMP riser <br /> <br />