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11:I�II�.'1:1�:1� �1:lllllfl �.Jlv:. 1t.f :+.l.l'�l(�f� ...�LG( (J.i <br />srnan - �r+r�ut�nrior��� srncr. - u�r��rv�nr�or� � crnce •. �ui�t�n�ni�ov�� srnc� ..it�Ft�u�niinn - <br />'.ftl ..-cfs.' ""...._ (ft) _._cfc._ ....... (fU -..cf;__ '__"_.' If:) -�-ct:.. ... .. <br />___�,_'___'_______'__________-___""'_-'_______"'_'____"""___'==z'==__'__'<_'_____'_-_-. :.-__.. __ <br />______"___""'___ ' <br />snc.ea o.0000 sa�.zo o.no72 sa�.eo o.otss sae.00 u.r,;:�� <br />SAf.SU 0.0012 547.90 0.0099 547.70 0.0176 SSB.00 0.0]•:' <br />S�/.OU 0.0092 547.40 O.Oi13 5n7.00 0.0198 <br />'v,1/.10 O.00S2 54i.50 0.013� 5C/.90 O.G219 <br />Discharge structures consist of (a) overflow weirs associated with the compost filter <br />berms, (b) a"bubble-up° catchbasin to disperse flows from fooling drains along the <br />northern tier of homes, and (c) individual bubble-up yard drains along the southern tier <br />of homes for footing-drains. <br />OVERFLOW WEIR 1� No. l5'eirl <br />fJr.cripticn: Uern Nt Di�cha:'qc P�• <br />Natio (�:tv): 3.2700 Woir lun9tli: 3.Ucuo i.. <br />P1: 550.00 ft. Weir Increm: u.10 <br />SiAGC •..-�ISCIIAflGE.._> STAGE <.-0ISClIFFGE-..a ;l�;C � � UI�^'nflf ..� STpGC ..-- DIf,Ci�tr-;C. <br />-..cfs.. .'"'" _ �Itl ..�... . ...._ (ftj � atr. � <br />(fl) -�-cfs-- ....... (ft) - . . <br />...:""___'____'_________"__"__'_'-_______-___"__'_"'_" _'__: _ . . . ... . .... <br />650.00 0.0000 550.20 1.0131 550.40 3.7o]5 `.`:1 `r � u/ae <br />,50.10 n.9921 550.30 1.9966 550.5n <.ii]i;9 <br />O�EqFLOW WE1R IO No. Weir2 <br />�c:cription: Berm a2 Oi^,charpe Weir <br />Ratio (h:tv�: 3,2100 Weir lengt�: 3 AU00 t:. <br />tR: S4B.50 tt. Wcir Increm: 0.10 <br />;tnGf •...�iSCHABG[...> STAGE <..D15CHAfIGE...> r1;P'1: �..I)1&CIIA'�.LE...�• :11ASi '-�fII:.CIb�RGE...�. <br />�t:l �--cic.. ....... (ftl ...cfs-- ...._. ;i:1 -cf., . ... _. It:l ...�f�:.. .... <br />.__.. _ ._ ._. __ <br />_ ' "_ _„__,__'_-_ . .__ ._...__ . _,_._ - . . <br />. "_'_ _" __ _. ._ ._._ <br />4(i 50 0.0000 5<8.70 1.01]1 SAB -9 .1.1F�I5 �2 00 n.b70� <br />'�4FLEa 0.3321 S•`.B.BO 1.99ff, SA9.nt1 C.B/Fi9 <br />OVGRFLOW YlEIFi ID No. Wcir3 <br />Ue:eription: Berm N9 Oiec�arge Pu�r- <br />Hntio (h:tv�: 3.2100 Wcir len9U� �.i`������� li. <br />f L 547.50 ft. Weir Incrcn. O.iO <br />31ni3f ---0ISCHPRGE...> STAGE <..OISCIIAFc6"' Str,pf �- C15CMfd�Gl.�-^ 3i„I •..U13CnpRGh�-^ <br />;i;l ��cfs.. ....... (Tt) ...cfc.. ..._.._ <br />i...� �.. �.L� . c!:. <br />_.._`_. _ "_'_ _-___. __'_- -'_, ' _ ._ .. _ _ <br />__ -"" _'" ____ . __ __ ..__ _ <br />t! SJ 0.�000 547.70 1 0131 54i 0 3.2825 548.00 4.0 h• <br />S�/.f;J 0.3921 547.80 1.9JGG S�B.OU 4.07B9 <br />The next table lists the calculated runoff hydrographs assuming the entire un-retained <br />site's runoff enters the compost filter berms. In actual fact, very little runoff from the site <br />enters the compost filter berms - only the following areas enter the compost filter berm <br />system: <br />• Runoff generated within and immediaiely adjacent to the buffer <br />. Groundwater collected in the rain gorden underdrains, and <br />. Rain garden overflow <br />Recognizing that the "worst case scenario" would be a period ofi prolonged rainfa!I <br />during the winter months resu�ting in saturated soiis and full rain gardens, this table <br />provides a look at the function of the compost filter berms as if the rain gardens <br />provided no attenuation. <br />HEARTHSTONELANE 15 ORAINAGE REPORT <br />APRIL 2006 <br />