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HomeMy WebLinkAboutWPO201800016 Plan - Other (not approved) 2018-12-10BIRDWOOD GOLF COURSE SITE DATA: TAX MAP PARCELS: 75-63 PARCEL AREA: 544 ACRES LIMITS OF DISTURBANCE: 161 ACRES ZONING: R-1 RESIDENTIAL PROPOSED USES: GOLF COURSE UTILITIES: ACSA DRAINAGE DISTRICT: UPPER RIVANNA RIVER WATERSHED SPECIAL CONDITIONS FROM NATIONWIDE PERMIT 42 Special Conditions: As mitigation for the proposed impacts the applicant will grade approximately 0.49 acre of upland adjacent to an emergent wetland found on Hole #16 and approximately 0.26 acre of upland adjacent to an emergent wetland found on Hole 18 and plant both areas with herbaceous hydrophytee. Approximately 0.75 acre will be planted. Monitoring reports must he submitted before September of each monitoring year. The report will identify and document visual observation, the presence/absence of the dominance of vegetation having an indicator status of Facultative or wetter vegetation within the planted areas. If a dominance of Upland species or the presence of invasive species is observed, a corrective action plan will be initiated. Both areas will be monitored for a maximum f 1 gears. Monitoring will commence following construction in year 1 and in years 2, 3, 5, 7, and 1. I ounce: Letter d. 4/26/18 from Vincent D. Pero, U A E, to Chris Schooley, U A Foundatioill AMENDMENT TO WPO 201800016 COUNTY OF ALBEMARLE DECEMBER 7, 2018 PROJECT SITE CHARLOTTESVILLE CITY VICINITY MAP SCALE 1" : 5000' OWNER: UNIVERSITY OF VIRGINIA FOUNDATION PO BOX 400218 CHARLOTTESVILLE, VA 22904 ENGINEER OF RECORD: TIMMONS GROUP 608 PRESTON AVENUE SUITE 200 CHARLOTTESVILLE, VA 22902 CONTACT: CRAIG KOTARSKI, P.E. TELEPHONE: 434-327-1688 SIGNATURE PANEL: DEPARTMENT OF COMMUNITY DEVELOPMENT ENGINEERING APPROVAL Sheet List Table TOTAL: 2 SHEETS DATE Y� Q CRAdG 1. J. KOTARSKI Lic. No. 0402048507 12/ 07/ 18 r IVAL M E O O M U N U1 N O Q O > E w LU ~ U U. U o w O o U�J L M Q� U o� W = — C-1 M C7 W N z� CUM O x a) C) a U-) _ N = U > � Q c Ln O O i M d � CO J CL O z 0 ►7 z O d U w r) z O_ w ry w H- Q n DATE 12107118 DRAWN BY 1. WILSON DESIGNED BY 1. WILSON CHECKED BY C. KOTARSKI SCALE w O U LL a J 0 z r n v o U w LU \ J cl� O C U O w m J <1 0 m L FM JOB NO. SHEET NO. C000 A soils B Soils C Soils D Soils Totals % of Total Forest/Open (acres) 0.00 42.00 0.00 0.00 42.00 26 Managed Turf (acres) 0.00 117.40 0.00 0.00 117.40 73 Impervious Cover (acres) 0.00 1.60 0.00 0.00 1.60 1 161.00 100 Virginia Runoff Reduction Method Worksheet Virginia Runoff Reduction Method Worksheet g g rr ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - -- -- DEQ Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0 Site Compliance Summary BMP Design Specifications List. 2013 Draft Stds & Specs ( �, Maximum % Reduction Required Below * Note: % Reduction will reduce post -development TP load to less than or equal to baseline load of 65.351b/yr (0.41 Ib/ac/yr) Site Summary Pre-ReDevelopment Load 20% [Required reduction for Post-ReDev. = Post-ReDev TP load - baseline load of 65.354 Ib/yr], baseline load = site area x 0.41 Ib/ac/yr CRAIGW J. KOTA S KU � 4 Lic. No. 0402048507 14" Total Rainfall (in): 43 � � ); a Total Disturbed Acreage: 161.00 21 07/ 81 Site Land Cover Summary Sr 3 IVAL Pre-ReDevelopment Land Cover (acres) �V M E ** TARGET TP REDUCTION EXCEEDED BY 1.1 LB/YEAR ** EXCESS CREDITS OF 1.1 LB/YR APPLIED TO o N *Reduction below new development load limitation not required W P0201800059 N � Q O Post-ReDevelopment Land Cover (acres) > E w a� E U w o LL W 0 ro,i 0� LU L M Site Tv and Land Cover Nutrient Loads a � U oo Z w - Lri 0 aiAON a C7 W N a- 0 3 X U W 0 Q W 2 C N Z Baseline TP Load (lb/yr): 65.354* *Reduction below new development load limitation not required = U j k O ~ Ln N O ON Total TP Load Reduction Required (lb/yr) 6.41 3.60 2.81 41 N i � M � d � CO J �o (- Virginia Runoff Reduction Method Worksheet to C� O Drainage Area A Summary C7 Land Cover Summary Of H 0 W W W = Q Summary Print U 0 24.62 Q Z BMP Selections 0 cn DATE Virginia Runoff Reduction Method Worksheet � 12/07/18 0 } DRAWN BY - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Drainage Area Summary J. WILSON • DESIGNED BY • J. WILSON • CHECKED BY Drainage Area Compliance Summary C. KOTARSKI • • SCALE • • • UJ w Summary Print (n W V / 0 Virginia Runoff Reduction Method Worksheet Z) Q O ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ U w Runoff Volume and CN Calculations LU 1-year storm 2-year storm 10-year storm > 1..� Target Rainfall Event (in) 0.00 0.00 0.00 r n J V/ O7 Summary Print r n U V w J 0 a O W m J O Q UJ u� z < 0 1� O c L 30B NO. 40490 SHEET NO. Summary Print C4 0 9 rLU v A soils B Soils C Soils D Soils Totals % of Total Forest/Open (acres) 0.00 16.74 0.00 0.00 16.74 10 Managed Turf (acres) 0.00 141.06 0.00 0.00 141.06 88 Impervious Cover (acres) 0.00 3.20 0.00 0.00 3.20 2 * Forest/Open Space areas must be protected in accordance with the Virginia Runoff Reduction Method 161.00 100 Final Post -Development Post- Post- Adjusted Pre- (Post-ReDevelopment ReDevelopment Development ReDevelopment & New Impervious) (New Impe Final Post -Development Load (Post-ReDevelopment &New Impervious) Pre- ReDevelopment TN Load (Ib/yr) 518.10 428.46 Pre - Final Post -Development Post-ReDevelopment TP ReDevelopment TP Load per acre Load per acre TP Load per acre (lb/acre/yr) (Ib/acre/yr) Ib acre r 0.38 0.45 0.43 D.A. A D.A. B D.A. C D.A. D D.A. E Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0.00 Managed Turf (acres) 24.03 0.00 0.00 0.00 0.00 24.03 Impervious Cover (acres) 0.59 0.00 0.00 0.00 0.00 0.59 Total Area (acres) 24.62 0.00 0.00 0.00 0.00 24.62 D.A. A D.A. B D.A. C D.A. D D.A. E Total TP Load Reduced (Ib/yr) 7.51 0.00 0.00 0.00 0.00 7.51 TN Load Reduced (Ib/yr) 53.73 0.00 0.00 0.00 0.00 53.73 Total Runoff Volume Reduction (ft3) 11,967 Total TP Load Reduction Achieved (Ib/yr) 7.51 Total TN Load Reduction Achieved (Ib/yr) 53.73 Remaining Post Development TP Load 64.91 (Ib/yr) Remaining TP Load Reduction (Ib/yr) Required 0.00 A Soils B Soils C Soils D Soils Total % of Total Forest/Open (acres) 0.00 0.00 0.00 0.00 0.00 0 Managed Turf (acres) 0.00 24.03 0.00 0.00 24.03 98 Impervious Cover (acres) 0.00 0.59 0.00 0.00 0.59 2 Managed Turf Impervious BMP Treatment TP Load from Untreated TP Load TP Removed TP Remaining Downstream Treatment Practice Credit Area Cover Credit 3 Volume (ft ► Upstream to Practice (Ibs) (Ib/yr) (Ib/yr) to be Employed acres Area acres practices Ibs 9.a. Sheetflow to Conservation Area, A/B Soils (Spec #2 10.94 0.28 8,908.02 0.00 5.59 4.19 1.40 9.c. Sheetflow, to Vegetated Filter Strip, A Soils or Compost Amended B/C/D Soils 13.09 0.31 10,572.38 0.00 6.64 3.32 3.32 (Spec #2 & #4) Total Impervious Cover Treated (acres) 0.59 Total Turf Area Treated (acres) 24.03 Total TP Load Reduction Achieved in D.A. Ib/ r 7.51 Total TN Load Reduction Achieved in D.A. 53.73 Ib/ r Drainage Areas RV & CN Drainage Area A Drainage Area B Drainage Area C Drainage Area D Drainage Area E CN 62 0 0 0 0 RR (ft3) 11,967 0 0 0 0 1-year return period RV wo RR (ws-in) 0.00 0.00 0.00 0.00 0.00 RV w RR (ws-in) 0.00 0.00 0.00 0.00 0.00 CN adjusted 100 0 0 0 0 2-year return period RV wo RR (ws-in) 0.00 0.00 0.00 0.00 0.00 RV w RR (ws-in) 0.00 0.00 0.00 0.00 0.00 CN adjusted 100 0 0 0 0 10-year return period RV wo RR (ws-in) 0.00 0.00 0.00 0.00 0.00 RV w RR (ws-in) 0.00 0.00 0.00 0.00 0.00 CN adjusted 100 0 0 0 0 L_