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2020 MS4 Annual Report <br />Pond Maintenance <br />GROf- u. �3. <br />. ✓tom '�P. b_ <br />�+ 1 _� l � ti�f ems* i- 'Z ®T'�-r�rws I l {, <br />. _ d• - <br />I: <br />RENXIVE PNONCHRCE <br />f i <br />'ti,_ <br />CAM40ED4&NCH RCP} <br />APRON DA.,..._IAND <br />S;'�". i <br />•.I ER081d1 <br />..r•^ <br />-II <br />RJCONNEMINGI M ,bp _ +.-. <br />•-r ^l <br />I � GOHTRIX BIMI(ET <br />I <br />_- <br />�•� <br />SEC NOFRCP1 I ,l� li ,_ <br />�. E Y0r 11- �c'1 I i <br />`I `. REQUIRED IN ARPA <br />N 4 �.� l 1 aIS111RaEn FOR <br />- +-y-I <br />_ J_ <br />CONSTRl TIM ACCESS <br />-w t <br />�"lP <br />'i i <br />II .J <br />• 't <br />1 I�Ir <br />P. <br />sI <br />MPROREMOVE I <br />on W Y Y ' <br />i� e000. YD 1 <br />a sEDIMENr <br />44 <br />� <br />z, <br />1 <br />I <br />It <br />aI 4 <br />:1 <br />u <br />n. y <br />I <br />1 � <br />1 <br />Table 5: Fairview Pond Summary <br />Drainage Area <br />514.5 acres <br />Pond Area <br />2.15 acres (per 2016 pond inspection) <br />Impervious Surface <br />79% <br />Current Average Depth <br />3.7 feet <br />Current Wet Volume <br />8.0 ac-ft <br />Outlet Diameter <br />78-inch (NW) <br />Inlet Diameters <br />Two 36-inch (NE, SE), 48-inch (NW), 84-inch <br />equivalent arch (SE) <br />Tahie R, Fairview Pond Water Ouality AnalvsislPB Results <br />Volume to <br />TP <br />Annual TP <br />TSS <br />Annual <br />Option <br />Description <br />Excavate <br />Removal <br />Reduction <br />Removal <br />TSS <br />(cy) <br />Efficiency <br />(lbslyr) <br />Efficiency <br />Reduction <br />(%) <br />I°/o) <br />(tonslyr) <br />Existing <br />3.7' average <br />NIA <br />25.9 <br />214.4 <br />56.6 <br />72.4 <br />depth <br />1 <br />Excavate to 4.0' <br />1040 <br />26.4 <br />218.6 <br />57.0 <br />72.9 <br />average depth <br />2 <br />Excavate to 5.0' <br />4510 <br />28.0 <br />232.2 <br />58.3 <br />74.6 <br />average depth <br />3 <br />Excavate to 6.0' <br />7980 <br />29.3 <br />243.3 <br />59.4 <br />76.0 <br />average depth <br />4 <br />Excavate to 7.0' <br />11,450 <br />30.6 <br />253.4 <br />60.4 <br />77.3 <br />averse depth <br />5 <br />Excavate to 8.0' <br />14,920 <br />31.6 <br />262.0 <br />61.3 <br />78.4 <br />averse depth <br />s , j 111 3EC ON ' Average Removal Percentages <br />TSS 84% <br />- �11 TP 50% <br />tl„VR�I `:.I�Ai�'v ":lU h1111MM F01D ]Mlef 1 Mt A!!T] <br />