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HomeMy WebLinkAboutWPO201800077 Calculations WPO VSMP 2019-05-23 Old Trail Village Water Quality Compliance Tracking Ledger Date: 5/17/2019 Master Plan Minimum Estimated Drainage Area Above Minimum Constructed/ Target Drainage Required Drainage Design Drainage Area Running Compliance(Surplus)•• B Desi n TrackingNotes Planned Area Area'Facility lD Associated Blotk(s► BMP Type(per VSWMHI Compliance•• WPO Plan(Approval Date (acres) (acres) r (acres) (acres) (acres H-) Bioretention Facilities L-3 10,16,17,18(EAST VILLAGE) Biofilter(0.5 inch) 8.96 6.74 6.8E _ 0.14 0.14 W P0201600009(6-21-2016) 'Includes 0.63 acres capture from Block 31C development(refer to WP0201800080)' 5-3 10,16,17,18(EAST VILLAGE) Biofilter(0.5 inch) 6.89 5.18 6.32 1.14 1.27 WP0201600009(6-21-2016) 'Includes 0.23 acres capture from Block 31C development(refer to WP0201800080)' 5-12 10,16,17,18(EAST VILLAGE) Biofilter(0.5 inch) 5.87 4.42 4.36 _ -0.06 1.22 WP0201600009(6-21-2016) includes 0.65 acres capture from Block 31B development(refer to WP0201800080(• 5-5B 5,20,21(DENSTOCK APTS) Biofilter(0.5 inch) 3.52 2.65 - - - S-5A 5,20,21(DENSTOCK APT5) Biofilter(0.5 inch' 4.87 3.56 - - BF-A 5,20,21(DENSTOCX APTS) 0.52 -2.13 -0.92 WP0201700016(2-28-2018) a BF-B 5,20,21(DENSTOCK APTS) SWM facilities labeled"A,B,C,D,&E"shown hereon this water quality compliance 3 0Y -0.63 -1.54 WP0201700016(2-28-2018) N tracking sheet were designed in lieu of SWM facilities labeled"S-SA,&5-SB".These 0.31 0.31 -1.23 WP0201700016(2-28-2018) C BF{ 5,20,21(DENSTOCK APTS) facilities have been approved under WP0201700016 by Albemarle County with sufficient CO CO BF-D 5,20,21(DENSTOCK APTS) 1.15 1.15 -0.08 W P0201700016(2-28-2018) E. BF-E 5,20,21(DENSTOCK APTS) - 1.56 1.56 and/or additional required adequacy in accordance with approved WP0201600009. 1.48 WP0201700016(2-28-2018) - S-6 24,25,34,35 Biofilter(0.5 inch) 1.42 1.05 - - S-6A 24,25,34,36 Biofilter(0.5 inch) 12.50 9.41 - - S-7 19 Biofilter(0.5 inch) 6.66 5.01 _ - - - 5-7A 19 Biofilter(0.5 Inch) 1.81 1.36 - - 54 22(WEST VILLAGE) Biofilter(0.5 inch) 5.82 4.38 4.48 0.10 1.38 WPO201700071(08-28-2018) includes 0.20 acres reduction from Old Trail Entry development(refer to WP0201800079)' S-13 32(VILLAGE HIGHLANDS) Biofiter(0.5 inch) 9.68 7.28 10.38 3.10 4.48 WP0201800077(Not Approved Yet) Sum 67.98 51.15 39.00 4.48 4.48 I 'Individual BMPs may not meet this requirement as long as the sum of design drainage areas exceeds the suns of estimated minimum drainage areas. '•DA above Minimum compliance acreage remains available to offset future areas. --- --- Required Exceedance of Minimum Running Compliance Facility ID BMP Type(per MAIN) Drainage As-Built Drainage Area B Design TrackingNotes Draina a Area (Surplus/Deficit) WPO Plan/Approval Date B Drainage Area. (acres) (acres) (acres) (acres) Pond Facilities 'Includes 4.18 acres capture from Block 7A&7B development(refer to WP0201700044&WP0201800008)' �6u L-1 1,3,6,7,26,27,28,29(WEST VILLAGE) Retention Basin II(4xWQV)' 42.54 38.52 -4.02 -4.02 WP020140004(8-26-2014) "Includes 0.30 acres capture from Block 3C development(refer to updated WP0201300052&WP020140004)* COnSt�U 5-2 11,12,14,15 Ret.Basin III(4xWQV)with Aquatic Bench' 15.30 15.30 0.00 4.02 WP0201500066(11-17-2015) L-2 1,2,4,13(THE LODGE) Ret.Basin III(4xWQV)with Aquatic Bench 23.60 21.76 -1.84 -5.86 WP0201600009(6-21-2016) fed 5-1 23,32(VILLAGE HIGHLANDS) Retention Basin II(4xWQV) 11.14 7.86 -3.28 -7.30 WP0201800010(Not Approved Yet) ludes 1.75 acres from approved drainage area in Block 23(refer to WP0201100010)' Q,an - Parks Pond 1,3(VILLAGE CENTER) Enhanced Ext.Detention(2xWQV) 0.00 14.58 14.5E 9.46 WP0201700008(Not Approved Yet) ludes 2.05 acres capture from l-2&4.02 acres capture from L-1(refer to WP0201700008-Amendement to WP0201300052)• Sum 92.58 98.02 5.44 5.44 Design Submittal: Biock32(WP0201800077) Submittal Notes: Compliance as at 5/17/2019 Retention Basins: I Yes I Bioretention: I Yes I Total Site Compliance: �I Yes lie" Note:Capture areas noted above pertain to water quality capture only.Additional benefd provided from further water quantity capture not included. APPROVED by the Albemarle County Community uel pment Department Date -S a-31 q File 6 Zo f(G0 77