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2019 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 {, . _ d• - <br />I: <br />RENXIVE PNONEPIACE <br />I { <br />CAM40ED4& NCH RCP <br />APRON- REPAR DCIAAGE I ty '�+.". <br />- <br />J-'� 9EED AND EROSIdI <br />•.IGOHTROL <br />TO CONNEMINGI <br />,-r ^l <br />BIMI(ET " <br />I <br />SEC NOFRCP 1 ,_ <br />I ,lli <br />�. E 907.1 <br />` I `. REQUIRED IN ARP .�•,,! �.�� <br />DISNRtl[ll FOR <br />T�- <br />CONSTRUCTIM ACCESSIN <br />e 4k <br />"iI <br />Ir <br />I\\+• 1 �_' iVl ill i 't'!l <br />44 <br />1tI <br />I <br />It <br />aI' 4 <br />+.y <br />!r'r. <br />I�,REMOVE I <br />MPROAIMAE e000a vD 1 <br />a sEDIMENr <br />I <br />1 � <br />'i1t F <br />il✓J <br />wro� / Y T <br />l <br />�1I <br />I' <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 />Table 6, Fairview Pond Water Ouality Ana1v%islPB 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 />N <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 />29.3 <br />243.3 <br />59.4 <br />76.0 <br />average depth798D <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 />4 Illl 3EC ION Average Removal Percentages <br />TSS 84% <br />TP 50% <br />ykY'ba-� SY�17.7% <br />tl„ vR l `:.ILLi v ": lb PAI MM lOID ]M.f 1 M t A!!T] <br />