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HomeMy WebLinkAboutWPO202100006 Plan - VSMP 2021-05-06@ 2020 - 30 LLC FOOTHILL FARM MAINTENANCE BUILDING VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) PLAN WPO 202100006 TMP 62-73B ABBREVIATIONS SYMBOLS ALBEMARLE COUNTY, VIRGINIA RIVANNA MAGISTERIAL DISTRICT AC ACRE EXISTING PROPOSED ADA AMERICANS WITH DISABILITIES ACT ----- _._.._.._.._..I VDOT STD. EC-2 DITCH LINING ARV AIR RELEASE VALVE ._ BF BASEMENTFLOOR BM BENCH MARK VDOT STD. EC-3 DITCH LINING BW BOTTOM OF WALL (AT GROUND LEVEL) -498— — —12— CFS CUBIC FEET PER SECOND CONTOUR LINE WITH ELEVATION CG-12 ADA ACCESSIBLE CURB RAMP (VDOT STANDARD) 12 STORM SEWER STRUCTURE IDENTIFIER CL CLASS CMP CORRUGATED METAL PIPE O SANITARY SEWER STRUCTURE IDENTIFIER CO SANITARY SEWER CLEANOUT CONC CONCRETE BENCHMARK, TEST PIT CY CUBIC YARDS DB/PG DEED BOOK/PAGE MANHOLE WITH FRAME AND COVER DEQ VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY DIP DUCTILE IRON PIPE + 65EX + 65 SPOT ELEVATION DOM DOMESTIC E&S EROSION AND SEDIMENT CONTROL q (� ADA PARKING SYMBOL EL, ELEV ELEVATION EP, EOP EDGE OF PAVEMENT @ WATER CROCK METER ESMT EASEMENT EW END WALL �ceFIRE HYDRANT EX EXISTING FF FIRST FLOOR FH FIRE HYDRANT 0 • WATER VALVE FM FORCE MAIN — — WATERMAIN FPS FEET PER SECOND GSF GROSS SQUARE FEET '~ SANITARY SEWER MAIN GW GUY WIRE HDPE HIGH -DENSITY POLYETHYLENE PIPE m STORM SEWER HP HIGH POINT HT HEIGHT PROPERTY LINE/RIGHT-OF-WAY LINE INV INVERT IRF IRON ROD FOUND CENTER LINE IRS IRON ROD SET --- L LENGTH FENCE LINE LAT LATERAL LF LINEAR FEET EASEMENT LINE LP LOW POINT ---- LT LEFT MAX MAXIMUM MH MANHOLE MIN MINIMUM NSF NET SQUARE FEET NTS NOT TO SCALE OHE OVERHEAD ELECTRIC PC POINT OF CURVATURE PERF PERFORATED PL PROPERTY LINE PROP PROPOSED PSI POUNDS PER SQUARE INCH PT POINT OF TANGENCY PVC POINT OF VERTICAL CURVATURE PVC POLYVINYL CHLORIDE PIPE PVI POINT OF VERTICAL INTERSECTION PVT POINT OF VERTICAL TANGENCY R RADIUS R/W RIGHT-OF-WAY RCP REINFORCED CONCRETE PIPE RED REDUCER RPA RESOURCE PROTECTION AREA RT RIGHT RTE ROUTE SAN SANITARY SEWER SD SIGHT DISTANCE SDR STANDARD DIMENSION RATIO STA STATION SVC SERVICE SW SIDEWALK SWIM STORMWATER MANAGEMENT T TRANSFORMER TBR TO BE REMOVED TC TOP OF CURB TP TELEPHONE PEDESTAL TW TOP OF WALL UG UNDERGROUND UGE UNDERGROUND ELECTRIC UGT UNDERGROUND TELEPHONE/FIBER LINE UGU UNDERGROUND UTILITY VDOT VIRGINIA DEPARTMENT OF TRANSPORTATION VESCH VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK VSMP VIRGINIA STORMWATER MANAGEMENT PROGRAM WM WATER METER WTR WATER WV WATER VALVE ALBEMARLE CITY OF COUNTY CHARLOTTESVILLE FOOTHILL FARM DRIVE ROO �RoGrQosr �Ro DARDENTOWE p�yQ rtio SITE PARK C, �O N VICINITY MAP SCALE: 1 "=2000' OWNER: TOBIAS A DENGEL TRUST 1740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 ENGINEER: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 434-242-2866 ATTN: MICHAEL MYERS, PE, CFM RESPONSIBLE LAND DISTURBER DEREK TRIMINGHAM (CERT NO. 33125) LIMITS OF DISTURBANCE = 32,950 SF(0.76 AC.) WATERSHED = RIVANNA RIVER AND MEADOW CREEK HUC CODE = JR-14 REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 SHEET INDEX # SHEET TITLE 1 COVER SHEET 2 EXISTING CONDITIONS 3 EROSION AND SEDIMENT CONTROL PLAN 4 ESC-SWM NARRATIVE AND DETAILS 5 GRADING-SWM PLAN 6 DRAINAGE DIVIDES 7 DITCH AND CULVERT CALCULATIONS PROPERTY INFORMATION: TAX MAP AND PARCEL: 62-73B OWNER: TOBIAS A DENGEL TRUST AND LYNN T DENGEL TRUST SITE AREA: 5 AC SOURCE OF TITLE: DB 5107 PG 651 TOPOGRAPHIC SURVEY ROGER RAY AND ASSOCIATES, NOVEMBER 4, 2020 BOUNDARY SURVEY PLAT OF RECORD DATUM: NAVD 1988 CITY/STATE ALBEMARLE COUNTY, VIRGINIA ZONING: RA FLOODPLAIN NOTE: THE PROPERTY IS LOCATED IN ZONE "X", AN AREA DETERMINED TO BE OUTSIDE THE 0.2% ANNUAL CHANCE FLOOD PLAIN AS SHOWN ON FEMA MAP NO. 51003CO295D, EFFECTIVE DATE FEBRUARY 4, 2005. VRRM SPREADSHEET Virginia Runoff Reduction Method Worksheet DEQ Virginia Runoff Reduction Method New Development Compliance Spreadsheet - Version 3.0 BMP Design SpeciJimrions List: 2013 Draft Stds & Specs Site Summary Project Title: WPO2021000D6 - Foothill Farm Mamt. Bldg. Date: 44280 Total Rainfall = 43 inches Site Land Cover Summary A soils B Soils C Soils D Soils Totals % of Total Forest/Open (acres) 0.00 0.00 0-00 0.00 000 0 Managed Turf (acres) 000 0,94 000 0.00 0.54 71 Impervious Cover (acres) 0-00 0.22 0-00 0.00 0-22 29 076 100 Site Tv and Land Cover Nutrient Loads Site Rv 0 42 Treatment Volume Ift') 1,161 TP Load (lb/yr) 073 TN Load (Ib/ r) 5.22 Total TP Load Reduction Required (lb/yr) 0 42 Site Compliance Summary Total Runoff Volume Reduction (ft) 0 Total TP Load Reduction Achieved (Ib/yr) 0.00 Total TN Load Reduction Achieved (I b/yr) 0.00 Remaining Post Development TP Load 0.73 (lb/yr) Remaining TP Load Reduction (Ib/yr) Required 0.a2 0.42 LB/YR OF PHOSPHORUS CREDIT WAS PURCHASED BY THE OWNERS TOBIAS AND LYNN DENGEL ON APRIL 15, 2021 Om SCALE ENGINEERING fowner : TOBIAS A DENGEL TRUST 740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC I871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com 11 V z 0 W LU CU z z LI I— z C� G NG I..L LL J J 2 I11— O O LL 0 Lic. No. 33028 05/04/2021 sheet title: COVER SHEET scale: 111=20' date: 1 /26/2021 I sheet # 00 co 1 N co 1 OF 7 G a f i— U i— co 0 J Q LU w co C7 Q z z © 2021 - 30 LLC l 3'1@N EXISTING SOILS INFORMATION SOURCE: WEB SOILS SURVEY BY NRCS Custom Soil Resource Report ry Soil Map ; N W k k TBSJ 7!'J:lJO TC9® ,XOp TdfIIJ fA `� T&No T2NeM 3 K pSmle: 1:1,020 rp WW m A PwW&(&S" z 11") Meet It N� IN6 ,5 3D fi0 90 A Rr 0 45 90 S3 N�pojamm: wen Nemlor CmermortreRs: WG54 B79e8a: UIM Zm 17N7N WG584 9 Map Unit Legend ID•JIB'N 3 SI N Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 71C 71 D Rabun clay loam, 7 to 15 percent slopes 0.1 2.1 6.1% 86.1 % Rabun day loam, 15 to 25 percent slopes 720 Rabun clay, 7 to 15 percent slopes, severely eroded 0.2 7.8% Totals for Area of Interest 2.4 100.0% KEY v v v v v CRITICAL SLOPES (PER ALBEMARLE COUNTY GIS) vvvv SOILS TYPE BOUNDARY 71C NRCS SOILS TYPE NOTES 1. NO DETERMINATION WAS MADE AS TO THE LOCATION OR EXISTENCE OF UNDERGROUND UTILITIES. CALL MISS UTILITY BEFORE ANY GROUND DISTURBING ACTIVITIES. 2. TAX MAP 62 PARCEL 73B IS SUBJECT TO THE FOLLOWING: A. EASEMENTS TO VIRGINIA ELECTRIC AND POWER COMPANY (D.B. 689-553 & D.B. 615-389). B. 30' R/W (D.B. 1088-693 PLAT). 3. NO TITLE REPORT FURNISHED. THIS PROPERTY SUBJECT TO ANY CONDITIONS, UTILITIES, EASEMENTS, AND/OR COVENANTS THAT MAY EXIST. REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 Zr JOAN W. MILLER TMP62-]1B]ZONE RA USE: RESIDENTIAL DB 07 PG 490 PLAT \ \� EM \ \ �\ \\ _� 570— HP CHIMNEYI STORY FRAME STONE I / j \� \ \ \ --- \74C \ _ WALK \ \ \_1 1 \` --_ — •__ L/I FRAME \ \ \ — 565 1 �.- ` \ kJ \ \ \\ \\ DicOk \ \ /\/�\/�a/< BUILDING _ pAT \________ \ \ \ --- - - — _ OV Ro — \ r` Ro� FOUND c 8�0�2 OUND \ \ \ u \ \ \ \ Y\ A \\ \ \ \ EXISTII G TREE TO � \ \ \ \l\ \ \ BE REMOVED -,PROJECTLQCATcl \ I \ \ TOBIAS A DENGEL TRUST & LYNN T DENGEL TRUST _ TMP62-71 560 ZONE: RA USE: RURAL AREAS IDS 5107 PG 651 \ \ \ \ \ \ \ \ \ \ \ \ 1 1 \ \ \MITS OF DISTURBANCE=0.75A 550 k �\ \ \ \\ \ \ \ \ \ \ \ I EXISTING (8) TREES ITHI TNTN HEttMIT � � \\ �\ \ \ �\`\�\ \�\ \ \ 1 /�\•I� \—\1 I I O�F\CONSTRUC\O TO BE REMO\ED/ Bosom T.M. 62-73B \ \ \� I I \ 1 \ \ I I I I I ( ( / / / / / �i� �-540 — TOBIAS A. DENGEL TRUST & = 1 I I `%� \ \ ' U / -7 LYNN T. DENGEL \ \ \ 1 I I \ / / /� / I 1� D.B. 5158-751-A & 752 PLAT \ I I l I 1 k D.B.5107-651 \ \ / �7 rJ/ — 5pa`yg2�/ WI D.B.5040-669 I 1 I I I I / / / / — — W yED 25 �i D.B. 1088-693 & 694 PLAT I 1 I 1 \ • \ \& / / / /� �� / / so eEp 2° �0 0 18°3217" T=28.56' D p DD D p DD C =56.37' 'B=N57°15'44"W D D p DD 0 p DD pppp / `/ / y^5/ / i \/\J \\ \ \ \ \ \ D D D D oD D D DD D D pD I- \ a $30 \ 1 D p 77 D D DD D D DD D p DD D p CRITICAL SLOPES PER ALBEMARLE COUNTY GIS 590 / �/ k / /// \ \ \ \ D D D D p pDD DD pDD DD pDD DD p `/ \ \ \ \ \ \ \ \ \ D D D D D D DDD , DDD Dpt7 DDDp D D Dp D D Dp D D Dp D� p D vv DDD pD D D pD D DDpD DDD pD DD / \ \ i Chi / wPITER OTECi1OR BUFFER /%\/ /1/\/�/`,(/'\` \ \ PERALB= / / SPRING / \ 6' / / SPRING 9% / \ 99, \ ` T= 0.28' C �0.24' 525 \ \ CB=N51°35'28"W / \ \ \ \ 33" \ CULV RT \ \ \ S'T \ \ �Ss==, zo �_ / / / � / • ( \ \ � j � .. L —520 — 09 \IY,rO 9 4=33°17'0"— '90 \ R=132.86' RICHARDG MILLER III \ \ T=39.73' TMP62-]] \ \ C=76.13' Y / / �' — — — — — — ZONE: RA \ \ C8=N38°32'25"W — — — — USE: RESIDENTIAL DB 625 PG 589 BW BROWN \ \ \ 5693fi18 i TMP62-76A l% / / ON USE ?RESIDENTIAL DB 1891 PG 690 \ S81°16'4T'W 45.2T / \ EXISTING CONDITIONS 0 30 60 90 SCALE: 1 "=30' EMSCALE ENGINEERING owner: TOBIAS A DENGEL TRUST 1740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com a 0— N0 I..L 0 W U) 0 Z 0 Of 11J sheet title: U 0 Z Q W 2 I..L LL J J Z 0 0 LL EXISTING CONDITIONS scale: 111=30' date: 1 /26/2021 1 i 0 z Z) 0 U w J LU W m J Q sheet # 2OF7 ©2021 - 30 SCALE, LLC 21006141070FS0100911111N1210190101111009101xel2101oi STD# ABBREV. SYMBOL E&S PRACTICE 3.02 CE '� CONSTRUCTION ENTRANCE 3.05 SF X-X- SILT FENCE 3.08 CIP CULVERT INLET PROTECTION 3.09 TEMPORARY DIVERSION DIKE 3.13 ST -► TEMPORARY SEDIMENT TRAP 3.18 OP OUTLET PROTECTION 3.31 TS --o-- TEMPORARY SEEDING 3.32 PS Ps PERMANENT SEEDING 3.35 MU MULCH 3.38 TP P TREE PROTECTION LOD - - - LIMITS OF DISTURBANCE TEMPORARY SEDIMENT TRAP COMPUTATIONS WET DRY WET DRY BOTTOM CLEANOUT ST DA STORAGE STORAGE STORAGE STORAGE TRAP ELEV REQUIRED REQUIRED PROVIDED PROVIDED DIMENSIONS # (AC) (CF) (CF) (CF) (CF) 1 1.97 3564 3564 3984 3747 26 X 22 541.0 1992 TYPICAL TREATMENT - 2 SOIL STABILIZATION MATTING SLOPE INSTALLATION FILL SLOPE SECTION `J. SOIL STABIUUTION MA1S SHOULD BE INSTALLED VERTICALLY / Q DONTISLOPE FOR BEST RESUL75. f A / / : 5' // 0 TOE MAINTAIN SLOPE ANGLE SLOPE LINING (WET SLOPE) TREATMENT - 2_ POLYPROPELYENE NON -WOVEN (NEEDLE PUNCHED) GEOTE%DlE FI KLTER H CIII TLOTRFATM ONEr - 2) OF CUT SLOPE Q NOTE- SLOPE SURFACE SKILL BE SMOOTH AND FREE OF V ROCRS, LUMPS OF DFN, CRASS AND STICKS. MAT SHALL BE PLACED MT ON SURFACE FOR PROPER SOIL ]� CONTACT. 4' DIRT SHALL BE TAMPERED PRIOR TO LAYING TOP / uPOVER �/ BERM TRENCH INTO BERM AND PROGRESS DOWNSLOPE SLOPE LINING (.DRY SLOPE) TREATMENT - BOTTOM OF FILL BOTTOM OF CUT SLOPE 9'DR SHOULM, BREAK POINT Source: VDOT Road and Bridge Standards 3.36 TOP OF CUT SLOPE 2' Plate 3.36-5 EC-2 DETAIL DETAIL TAKEN FROM VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK - SOIL STABILIZATION TREATMENT 1 (EQUIVALENT TO VDOT STD. EC-2) TEMPORARY DIVERSION DIKE DD) TEMPORARY DIVERSION DIKE VESCH STD. 3.09 REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 1992 3.13 TEMPORARY SEDIMENT TRAP TOP OF EMBANKMENT = 546.0 WIDTH = 3.0' i' VARVffiE CREST OF °F°CfPL WEIR = 545.0 vATNAB c CRWND 57 CU. YD./ACRE BOTTOM OF �. V°xwD E WEIR = 543.0 97 CU. YD./ACRE BOTTOM OF (ExcAVAUD) ` "° TRAP = 539.0 FL ER CLOTH GROUND EL" .���31�'CROSS SECTION OFCOARSE OUTLET CLASS IRIPRAP CLASS I RIPRAP � LENGTH (IN FEET) � 12' B x DRAINAGE AREA DIVERSION pN Ac.) DIRE COARSE AGGREGATE E AREA FILTER CLOTH �1 AREA fCOARSE AGGREGATE SHALL BE VDOT #'3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) Source: Va. DSWC Plate 3.13-2 ST TEMPORARY SEDIMENT TRAP 1992 CIP VESCH STD. 3.13 SILT FENCE CULVERT INLET PROTECTION 'DISTANCE IS 5' MINIMUM IF FLOW 11T IS TOWARD DARANNMENT FLOW CULVERT INLET PROTECTION VESCH STD. 3.08 4.0' 3.08 PROVIDE DITCH LINING IN ACCORDANCE WITH DITCH SCHEDULE THIS SHEET - SEE SHEET 7 FOR DITCH CAPACITY AND VELOCITY CALCULATIONS DITCH CROSS-SECTION DITCH SCHEDULE n=0.03 LENGTH TOP DEPTH SLOPE SIDE Q10 V10 D10 FULL (FT) WIDTH (FT) (%) SLOPE (CFS) (FPS) (FT) CAP LINING (FT) (CFS) DITCH 1 72 4.0 1.0 15.00 2:1 3.10 6.73 0.48 22.40 CL Al RIP -RAP DITCH 2A 56 4.0 1.0 16.00 2:1 0.56 4.48 0.25 23.20 EC-1 RIP -RAP DITCH 2B 68 4.0 1.0 1.50 2:1 0.40 1.63 0.35 7.10 EC-2 DITCH 3 114 4.0 1.0 1.50 2:1 2.58 2.71 0.69 7.10 EC-2 _ I _ 575 - _ DITCH 3 - 114-LF V-DITCH LINED WITH \ \ - _ VDOT STD. EC-2 @ 1.5% \ '' r \ 565 - -� _ -�- \ -- �` _-------- - \ \M - -__ -- 1 1 - \\ 6�3\ :- PATH \EXISTING TREE DITCH 2B - 68-1-F,V-DITC LINED WITH VDOT STD. EC-2 @ 1.5% TO BE REMOVED 69 BANK s s a 560- `\\qy \\\ \ \� 6867- - i 66 65 \ \ 646 g0 59 60 662 - 0 57 58 CIP 4 56 5, w J \ 7,080 SF GRAVEL ro a } \ +\ TRAVELWAY o. N 1 \\ CE \\ \ 8.0' 58+ r _- \ \ - 22.2' I o \ t I TOBIAS A DENGEL TRUST & PROP. 50+(F 15" HOPE @ 0.60% LYNN T DENGEL TRUST PROVIDE WATER SOURCE T\\O AN \ , 0-32ZC48' BUILDING, MAINTENANCE 8_ ZONE: RA CONSTRUCTION VEHhgLES BEFORE / 58- L BUILDING _ - 57_ I USE: RURAL AREAS LEAVING THE SITE. I ECT WASH / ° DB 5107 PG 651 WATER TOWARD SEDIMENT TRAP // o ` 12' WRAP -AROUND SHED 20.0' 540 _ 57 $ \ 55 0 I _ / 20.0' 39-7- -bbb- - LIMITS OF DISTURBANCE = 0.75 A / _ _ I DITCH 2A ' TP o 56-LF RIP -RAP DITCH - DITCH 1 VDOT STD EC-1 STONE \ \ \72-LF CLASS Al RIP -RAC / / \ 01 0 �-(T2" THICK) @ 16% DITCHH (18" THICK) @ 15/0 \ - 5756 55 1 ( / / , 54 0 - / / d C1 53 52 I \ - D5BOTTOM TRAP = 539.0 / S T 50 51 + WET STORAGE - 984CF / 49 48 - - DRl STORAGE = 3.747 PSF/ 47 46 @EL=5454 , 4 4 - 42 44 -545- ?L ce 390+ 80.9' 4 4646 45 Xlow �k \ / / 3 _ 42 now 0 39p6 X� - 540-=no son Now TP �j SF 29'2 �- / / X 8 SMALL EXIST G TREES PP J�MgE�EO Zp20 \ \ \ \ IP- ��'O/ VERFLOW WEIFj / / / WITHIN Llyl- OF/ / NO S3S \ 3 CONSTRUCTION TO E _R fOM OF WEIR = 543.0 / / REMOVEJO TOP OF WEIR�45. Z O"F 3 WIDE /EMBANKMENT = 546'0 630 \ 540 /.5 / O � PROTECT �N ONN GI / / / ALBEM / WATER ARLE SPRING / FEN _ / r SPRING/ 9 x4_� %GRAVEL Ill N EROSION AND SEDIMENT CONTROL PLAN 0 20 40 60 SCALE: 1 "=20' EMSCALE ENGINEERING owner: TOBIAS A DENGEL TRUST 1740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com Z nJ V J C) Z W L LL J J Z O 0 B� > z 0 U LL J 2 Lu to J Q sheet title: EROSION AND SEDIMENT CONTROL PLAN Iscale: 1 "=20' I date: 1 /26/2021 sheet # 3OF7 © 2021 - 30 LLC EROSION AND SEDIMENT CONTROL NARRATIVE PROJECT DESCRIPTION THE PURPOSE OF THIS PLAN IS TO CONSTRUCT A 32' X 48' MAINTENANCE SHED WITH 12' WRAP -AROUND SHED AND SURROUNDING GRAVEL ACCESS AREA. SINCE THE TOTAL DISTURBED AREA TO COMPLETE THIS WORK IS GREATER THAN 10 000-SF AND THE OWNER DESIRES TO BUILD AN OUTBUILDING ON THE PROPERTY, A VIRGINIA STORMWATER MANAGEMENT PROGRAM (VSMP) PERMIT IS REQUIRED. THERE IS AN EXISTING RESIDENCE AND GRAVEL DRIVEWAY ON THE 5-ACRE PROPERTY, CURRENTLY ZONED RA (RURAL AREAS). THE LAND COVER ON THE PROPERTY IS PRIMARILY MEADOW WITH SCATTERED TREE COVER. THE SITE SLOPES VIA SHEET FLOW TOWARD THE SOUTH. THERE ARE TWO SPRINGS AND A WPO BUFFER ALONG THE SOUTHERN EDGE OF THE SITE. NO DISTURBANCE OF THESE AREAS IS PROPOSED WITH THIS PLAN. ADJACENT AREAS THE SITE IS BORDERED ON THE NORTH AND EAST BY FOOTHILL FARM, WHICH IS UNDER THE SAME OWNERSHIP AS THE SUBJECT PROPERTY. RESIDENTIAL PROPERTIES ZONED RURAL AREAS BORDER THE SITE ON THE WEST AND SOUTH. SOIL DESCRIPTIONS BASED ON THE WEB SOILS SURVEY, THE FOLLOWING SOILS ARE ANTICIPATED TO RF FNf:rll INTFRFn ANITHINI TlAr I ISAITC r1F WnRK PREDOMINANTSOILS NAME RUNOFF CLASS FREQUENCY OF FLOODING FREQUENCY OF PONDING DEPTH TO WATERTABLE SOILS GROUP RABUN CLAY LOAM 7-15%(710 MEDIUM NONE NONE >80" B RABUN CLAY LOAM 15`25% 71D MEDIUM NONE NONE >80" B -RABUN CLAY LOAM 7-15%[720) -SEVERELY ERODED MEDIUM NONE NONE >80" B •72C31S LOCATED ON THE NORTHERN FRINGE OF THE WORK AREA. CRITICAL AREAS GIS MAPPING INDICATES CRITICAL SLOPES AND A WATER PROTECTION ORDINANCE BUFFER ON THE PROPERTY. THE PROPOSED CONSTRUCTION DOES NOT PROPOSE DISTURBANCE OF ANY CRITICAL AREAS. EROSION AND SEDIMENT CONTROL MEASURES ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED IN ACCORDANCE WITH THE MINIMUM STANDARDS AND SPECIFICATIONS IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK UNLESS OTHERWISE DIRECTED BY THE ALBEMARLE COUNTY INSPECTIONS DEPARTMENT. THE FOLLOWING EROSION AND SEDIMENT CONTROL PRACTICES (VESCH REFERENCE NUMBER INCLUDED) MAY BE IMPLEMENTED WITH THIS PLAN AND IS NOT AN EXHAUSTIVE LIST: VESCH REFERENCE# 3.01 - SAFETY FENCE (SAF) A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. 3.02 - TEMPORARY CONSTRUCTION ENTRANCE (CE) A CONSTRUCTION ENTRANCE SHALL BE PROVIDED AT THE ENTRANCE OF THE PROJECT SITE TO PROVIDE A MEANS OF REMOVING SEDIMENT FROM THE TIRES OF CONSTRUCTION VEHICLES LEAVING THE WORK SITE. THE CONTRACTOR SHALL REMOVE ANY MUD FROM THE EXISTING ROAD SURFACE BY MEANS OF SWEEPING AND SHOVELING IN THE EVENT THE WASH AREA IS NOT ADEQUATE IN SEDIMENT REMOVAL. PLEASE NOTE THAT SINCE THE DURATION OF THE PROJECT IS EXPECTED TO TAKE LESS THAN 60 DAYS, A TEMPORARY STONE CONSTRUCTION ENTRANCE IS PROPOSED IN LIEU OF A PAVED CONSTRUCTION ENTRANCE SINCE THE PERMANENT ACCESS WILL BE STONE. 3.03 - CONSTRUCTION ROAD STABILIZATION (CRS) THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND OTHER ONSITE VEHICLE TRANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. DUE TO THE LIMITED USE OF THE ACCESS PATHWAY, A STONE ACCESS IS NOT ANTICIPATED TO BE USED WITH THIS PLAN. 3.05 - SILT FENCE (SF) SILT FENCE IS TYPICALLY INSTALLED AS A FIRST STEP IN CONSTRUCTION ACTIVITIES. LOCATION AND DETAILS ARE SHOWN ON THE PLANS. 3.08 - CULVERT INLET PROTECTION (IP) A SEDIMENT FILTER AREA AROUND A CULVERT INLET TO MINIMIZE SEDIMENT FROM ENTERING THE STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. 3.09 - DIVERSION DIKE (DID) A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHT-OF-WAY AND SIMILAR SLOPING AREAS. LOCATION AND DETAILS OF THE RIGHT OF WAY DIVERSION ARE SHOWN ON THE PLANS. 3.13 - TEMPORARY SEDIMENT TRAP (ST) A TEMPORARY SEDIMENT TRAP IS TYPICALLY INSTALLED BEFORE SITE GRADING BEGINS, FOR THE PURPOSE OF DETAINING SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS. 3.31 -TEMPORARY SEEDING (TS) TO THE MAXIMUM EXTENT POSSIBLE, TEMPORARY SEEDING SHALL BE APPLIED TO DENUDED AREAS THAT REMAIN DORMANT FOR 7 DAYS. SEEDED AREAS SHALL BE LIMED WHEN NECESSARY AT A RATE OF 2 TONS/ACRE, AND FERTILIZED AT A RATE OF 600 LBS/ACRE OF 10-20-10 (14 LBS. PER 1,000 SQUARE FEET) OR EQUIVALENT. CONTRACTOR SHALL SELECT TEMPORARY SEEDING PLANT MATERIALS FROM TABLE 3.31-B OR C FROM THE VESCH. 3.32 - PERMANENT SEEDING (PS) A PERMANENT VEGETATIVE COVERING SHALL BE ESTABLISHED ON DISTURBED AREAS WITHIN 7 DAYS OF BEING BROUGHT TO FINAL GRADE AND THAT WILL NOT BE PAVED OR OTHERWISE BUILT UPON. CONTRACTOR TO SELECT THE PERMANENT SEEDING MIXTURE IN ACCORDANCE WITH THE SPECIFICATIONS IN THE VESCH. 3.35 - MULCHING (MU) ALL SEEDED AREAS SHALL BE MULCHED WITH STRAW IMMEDIATELY FOLLOWING SEEDING OPERATIONS. STRAW MULCH SHALL BE APPLIED AT A RATE OF 1.5 TO 2 TONS/ACRE. OTHER ALTERNATIVES MAY BE SELECTED FORM TABLE 3.35-A OF THE VESCH. 3.38 - TREE PROTECTION (TP) THE USE OF FENCING TO SERVE AS A VISUAL AND PHYSICAL BARRIER FOR THE EXISTING VEGETATION THAT IS TO REMAIN UNDISTURBED AS PART OF THIS PLAN. EROSION AND SEDIMENT CONTROL MEASURES - MAINTENANCE 1. THE CONSTRUCTION ACTIVITY OPERATOR OR HIS DESIGNEE, SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL DEVICES IN ACCORDANCE WITH THE SCHEDULE PROVIDED IN THE GENERAL CONSTRUCTION PERMIT. IT IS RECOMMENDED THAT DEVICES BE CHECKED EACH DAY AND CERTAINLY AFTER EACH RAIN EVENT, AND THAT REPAIRS ARE MADE IMMEDIATELY AND AREAS ARE RE -SEEDED AND MULCHED AS APPROPRIATE. 2. ALL SEDIMENT -TRAPPING DEVICES AND FENCES SHALL BE CLEANED OUT AT 50 PERCENT CAPACITY OR HEIGHT, AND SEDIMENT SHALL BE DISPOSED OF BY PUMPING INTO A SILT -SACK OR OTHER APPROVED MEANS. 3. GRAVEL OUTLETS SHALL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP AND BE CLEANED WHEN SEDIMENT IS VISIBLY CLOGGING THE VOID SPACES. 4. DIVERSIONS SHALL BE CHECKED TO ENSURE PROPER RE-ROUTING OF DRAINAGE. DAMAGES THAT INTERRUPT THE EFFECTIVE FUNCTIONING OF THE DIVERSION SHALL BE REPAIRED IMMEDIATELY. 5. ALL SEEDED AREAS SHALL BE INSPECTED REGULARLY TO ENSURE THAT A VEGETATIVE COVER IS BEING ESTABLISHED. IN THE EVENT THAT THE SEEDING DOES NOT TAKE, CONTRACTOR TO TROUBLESHOOT AND TAKE REMEDIAL ACTION UNTIL THE APPROPRIATE VEGETATIVE COVER IS ESTABLISHED. GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND CONTROL SEDIMENT REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS FOR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:00 AM TO 9:00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. CONSTRUCTION SEQUENCE ANTICIPATED START DATE: JUNE 2021 ANTICIPATED COMPLETION DATE: AUGUST 2021 SEQUENCE OF CONSTRUCTION (ONE PHASE): 1. ESTABLISH TEMPORARY GRAVEL CONSTRUCTION ENTRANCE AND TREE PROTECTION FENCING AS SHOWN ON PLAN. 2. INSTALL PERIMETER SILT FENCE AND SEDIMENT TRAP AS SHOWN ON PLANS. ENSURE DIVERSION DIKE IS PLACED SO THAT ALL DISTURBED AREA WILL BE CONVEYED TO THE SEDIMENT TRAP. 3. PROVIDE TEMPORARY SEEDING ON DIVERSION DIKE AND DOWNSTREAM FACE OF SEDIMENT TRAP EMBANKMENT. 4. INSTALL 15" CULVERT AS SHOWN ON PLANS. PROVIDE CULVERT INLET PROTECTION AND GRADE IN DITCH TO DIRECT RUNOFF FROM CULVERT TO THE SEDIMENT TRAP. 5. PERFORM CUT/FILL OPERATIONS TO BRING SITE TO ROUGH PAD GRADE. BUILDING CONSTRUCTION MAY BEGIN. 6. GRADE IN DITCHES TO CONVEY RUNOFF TO CULVERT AND TO SEDIMENT TRAP. 7. PERMANENTLY STABILIZE ALL DISTURBED AREAS WITH PERMANENT SEEDING AND MULCH. 8. FINE GRADE SITE AND PROVIDE GRAVEL ACCESS AROUND BUILDING. 9. ONCE UPSTREAM AREA IS STABILIZED WITH PERMANENT VEGETATION OR IMPERVIOUS SURFACE, CONTRACTOR MAY REMOVE PERIMETER CONTROLS AND CONSTRUCT ENGINEERED LEVEL SPREADERS 1 AND 2. 10. REMOVE ALL EROSION AND SEDIMENT CONTROL DEVICES ONLY AFTER THE SITE IS STABILIZED AND PERMISSION IS GRANTED BY THE ALBEMARLE COUNTY EROSION AND SEDIMENT CONTROL INSPECTOR. EROSION AND SEDIMENT CONTROL PLAN MINIMUM STANDARDS (PER 9VAC25-840-40) 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS, OR 7 DAYS IF REQUESTED BY THE LOCAL INSPECTOR. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCK PILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. 4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. 6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN. A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES. B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A 25-YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED. 7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. 8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. 9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. 10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. 11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. 12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NONERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NONERODIBLE COVER MATERIALS. 13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NONERODIBLE MATERIAL SHALL BE PROVIDED. 14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. 15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED. 16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY. D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION. E. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS CHAPTER. F. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED WITH. 17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. 18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE VSMP AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH STANDARD (i), WHICH STATES, "INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIPE SYSTEM, OR TO A DETENTION FACILITY." STORMWATER MANAGEMENT NARRATIVE EXISTING CONDITIONS TABLE 331-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS -QUICK REFERENCE FOR ALL REGIONS' Rate Planting Dates ie lbs. acre) Sept. 1 - Feb. 15 50/50 Mix of Annual Ryegrass (Lo6um mu1G-florum) & ;0 PO Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 00 - 100 (Lohum multi-florum) May 1 - Aug 31 German Millet (Setaria italics) 5U Source: Va. DSWC �7 TEMPORARY SEEDING SPECIFICATIONS v / VESCH STD. 3.31 TABLE 3.32-D SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA Total Lbs. Per Acre Minimum Care Lawn - Commercial or Residential 175-200 lbs. - Kentucky 31 or Turf -Type Tall Fescue 95-100% - Improved Perennial Ryegrass 0.5% - Kentucky Bluegrass 0-5% High -Maintenance Lawn 200-250lbs. - Kentucky 31 or Turf -Type Tall Fescue 100% General Slope (3:1 or less) - Kentucky 31 Fescue 128 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop ' 20 lbs. 150 Ibs. Low -Maintenance Slope (Steeper than 3:1) - Kentucky 31 Fescue 108 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop • 20 lbs. - Crownvetch •• 20 lbs. 150 lbs. • Use seasonal nurse crop in accordance with seeding dates as stated below: February 16th through April ...................... Annual Rye May 1st through August 15th ..................... Foxtail Millet August 16th through October ...................... Annual Rye November through February 15th ................... Winter Rye " Substitute Sericea lespedeza for Crownvetch east of Farmville, Va. (May through September use hulled Seneca, all other periods, use unhulled Seneca). If Flatpea is used in lieu of Crownvetch, increase rate to 30 lbs./acre. All legume seed must be properly inoculated. Weeping Lovegrass may be added to any slope or low -maintenance mix during warmer seeding periods; add 10-20 lbs./acre in mixes. �7 PERMANENT SEEDING SPECIFICATIONS PS) VESCH STD.3.32 CURRENTLY, RUNOFF FLOWS ACROSS THE PROJECT LIMITS BY MEANS OF SHEET FLOW FROM NORTH TO SOUTH. THE EXISTING LAND COVER IS WELL -ESTABLISHED MEADOW AREA WITH SLOPES THAT RANGE FROM 5% TO 15%. THERE ARE NO VISIBLE SIGNS OF EROSION WITHIN THE PROJECT AREA DOWN TO THE EXISTING PROPERTY LINE. FOLLOWING DEVELOPMENT, RUNOFF WILL CONTINUE TO FLOW VIA SHEET FLOW FROM THE PROJECT LIMITS ACROSS THE MEADOW TOWARD THE SOUTHERN PROPERTY LINE. THERE ARE THREE PROJECT OUTFALL AREAS IDENTIFIED ON THE PLANS. OUTFALLS #1 AND #2 INCLUDE ENGINEERED LEVEL SPREADERS TO ENSURE RUNOFF CONTINUES TO FLOW VIA SHEET FLOW AND OUTFALL #3 IS BY SHEET FLOW AT THE BOTTOM OF A FILL SLOPE THAT RUNS PARALLEL WITH THE LAND CONTOUR. NO ADVERSE EROSION EFFECTS ARE ANTICIPATED AS A RESULT OF THE SHEET FLOW FOLLOWING DEVELOPMENT SINCE THE EXISTING MEADOW IS IN VERY GOOD CONDITION WITH A WELL -ESTABLISHED PERMANENT VEGETATIVE GROUND COVER (GRASS), AND SOME TREES. ALSO, THE UNDERLYING RABUN SOILS (71C AND 7AD) ARE DEEP, WELL -DRAINED, PERMEABLE SOILS AND ARE NOT HIGHLY ERODIBLE. CHANNEL AND FLOOD PROTECTION CHANNEL AND FLOOD PROTECTION IS MET BY COMPLYING WITH 9VAC25-870-66(D) SINCE ALL RUNOFF FROM THE SITE IS SHEET FLOW AND NO POTENTIAL IMPACTS ON DOWN -GRADIENT PROPERTIES OR RESOURCES HAVE BEEN IDENTIFIED, AND THEREFORE NO FURTHER WATER QUANTITY CONTROLS ARE REQUIRED. WATER QUALITY TO MEET THE WATER QUALITY REQUIREMENTS FOR THE PROJECT, THE OWNER HAS PURCHASED 0.42 LBS/YR OF PHOSPHORUS CREDITS FROM AN ACCREDITED NUTRIENT CREDIT BANK. MAINTENANCE THE ENGINEERED LEVEL SPREADERS SHALL BE PRIVATELY OWNED AND MAINTAINED BY THE PROPERTY OWNER. REFER TO MAINTENANCE GUIDELINES ON SHEET 6 OF THE PLAN AND SEPARATE STORMWATER MANAGEMENT MAINTENANCE AGREEMENT. NUTRIENT CREDIT BILL OF SALE VIRGINIA NUTRIENT IIANK P.O. Box 142 Penn Laird, VA 22846 - (.540) 908-1679 www. VireiniaNutricnmank.cam EXHIBIT A -BILL OF SALE Bill of Sale, made as of the ­I6'�$_day of April. 2021. by Virginia Nutrient Bank, LLC, a Virginia Limited Liability Company ("Seller'), to Tobias A. Dengel Trust & Lynn T. Dengel Trust ("Purchaser) Whereas, the Seller and Purchaser have entered into an Agreement for Purchase and Sale of Nutrient Offset Credits, dated as of April LJ0�: 2021 (the "Agreement"), the terms of which are incorporated herein by reference and made a pan hereof), with respect to the sale by Seller and purchase by Purchaser of Nutrient Credits held by the Seller's Upper James Nutrient Bank in Nelson County, Virginia within the James River watershed (HUC: 02080203). Now Therefore, for and in consideration of the payment of the purchase price (as defined in the agreement) and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Seller hereby sells, transfers, assigns, conveys, delivers, and sets over to Purchaser, its successors and assigns, 0.42 Nutrient Credits out of the Upper James Nutrient Bank as such are described in the Agreement. To Have and To Hold all such Nutrient Credits hereby sold and transferred to Purchaser and its successors and assigns forever for use in connection with Purchaser's project at Foothill Farm Drive Maintenance Building in Albemarle County. This project is located in HUC:02080204. In Witness Whereof, Seller has caused this Bill of Sale to be executed by its duly authorized representative as of the date first above written. Virginia No n�nJJcc, LL��7 / By: Gv v Name: NadiadW. Blackwell Title: Manager Acquirer: Tobias A. Dengel Trust & Lynn T. Dengel Trust Project: Foothill Farm Drive Maintenance Building (HUC:02080204) TM/P[N#: 62-73B Permince: Tobias A. Dengel Tmst & Lynn T. Dengel Trust 1740 Foothill Farm Drive Charlottesville, VA 22911 VSMP#: <I acre Nutrient Bank: Upper James -James- 050(HUC:02080203) Phosphorus Offsets: OA2 pounds Nitrogen Offsets: 1.51 pounds 1992 3.05 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A eX 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. E'MAX. I Jill FLOW - 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. FLOW 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-2 SF) SILT FENCE DETAIL VESCH STD. 3.05 STONE CONSTRUCTION ENTRANCE nn11nn1-t-, - r -- -: I • .rIS" r I Iti L VDOT 01 I I POSITIVE DRAINAGE CWRSE AGGREGATE D TD S111MENT TRAPPING OE VICE MUST EXTEND FULL MOTH OF INGRESS AND EGRESS TION PLAN VIEW 12 WN, " "` SECTION A -A RE Source: Adapted from 1983 Maryland Standards for Soil Erosion and Sediment Control, and Va. DSWC 10' MIN. CE) CONSTRUCTION ENTRANCE VESCH STD. 3.02 Plate 3.02-1 REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 EMSCALE ENGINEERING owner: TOBIAS A DENGEL TRUST 1740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com Z NJ Z O Z Uj Uj Z Q _O U) O W Z nJ I..f_ CO Z W L U. J J Z O O U. sheet title: ESC-SWM NARRATIVE AND DETAILS Iscale: NONE I date: 1 /26/2021 1 sheet # 4OF7 ii x > Z Z 0 U w J 2 w m < I- U iY I- Cn 0 J LY w U) Q 2 < Z Z > iY @2021 - 30 SCALE, LLC DITCH 1 EXISTING GRAVEL / / 25 SY V OT E� / 49 - — — DRIVEWAY /RIP -RAP (27" THIS 3 '+ 48 \ / UNDISTURBED EXISTING GRADE AT - 8 /o SLOPE / / 45- IS CURRENTLY WELL -ESTABLISHED SHOWING / / / 3 �\47 NO SIGNS OF EROSION / / — 4 / 453 46 Cb' / .� 3 32 SY VDOT #3 ENE / 40 SVDOT EC-1 / Q6 DEPTH VARIES 0"-36") _ 8' 3.75' 10' 3' 3' / RIP- Af 02" THICK) �� 0 443 / ` DITCH 3 / / by o- 44-0\� — — — _ — 114-LFV-13ITCH-LINED-WITH \ \ \ 440 50 VDOT STD. EC-2 @ 1.5% \ 545.3 3" DITCH 1 0% 545.0 565 — 0 443 / _ TPoj -- 440 3Q 453 \ ` - \ \ PATH \ 1 \ �575— \ \ \ -- -� — ---------- x r \ \ \ C 0 \ ` DIT6H 2B - 68-LFV-DITCHyLINED WITH VDOT STD. EC-2 @ 1.5 /° 443 cQ9 j 6� � _ KED 6X6 / / N2¢ �R/ \ \ \ 570 — / \ r \ 69 = s a BERS / / / p 0 42-LF 6X6 TREATEfY �hq \ �� m m 68 \ � \ � % \ / — — — \ \ — 65 WITH #4 REBAR- TOP OF / � � 66 VDOT CL Al RIP" -RAP\/\\��\\\\j/\/��\/j�\\\/�\\��\\��`/ #4 REBAR 6' O.C. TIMBER TO BE FLAT AT \ \ \ ` DEPTH VARIES /i�// °� / AN ELEVATION OF 545.0 \ \ \ w��� \ 6462 6 ( ) BURIED 2 FEET \ \ \ 61 BELOW EXCAVATED / KEG LEVEL ` \ \ A \ �0 60 MIRAFI 140N FILTER SPREA ER INTO \ `` — ! O FABRIC OR EQUIVALENT GRADE EXISTII� GRADE \ \ \ �\ 3 �— ENGINEERED LEVEL SPREADER (ELS) #1 4' — 57 58 59 570 w SECTION ENGINEERED LEVEL SPREADER (ELS) #1 DETAIL \ \\\ 7,o8oSFGRAVEL o N ADAPTED FROM DEQ SPECIFICATION NO. 2 1"=10' \ \ \\ ` TRAVELWAY o a NTS \ \ \ \. I \ 1 \ 58 0' 583 DITCH ZA 1544.3 0% VDOT EC-1 STONE UNDISTURBED EXISTING GRADE AT - 12% SLOPE IS CURRENTLY WELL -ESTABLISHED SHOWING NO SIGNS OF EROSION 2.5' 5' 2' 3' 3„ 544.0 2'7 iv ti� 0 �0 543.0 \ #3 M.- �­#4 REBAR @ 6' O.C. MIRAFI 140N FILTER BURIED 2 FEET BELOW FABRIC OR EQUIVALENT EXCAVATED GRADE ENGINEERED LEVEL SPREADER (ELS) #2 SECTION ADAPTED FROM DEQ SPECIFICATION NO. 2 NTS DITCH 2A i 49 — — 48 � � 12 SY VDOT EC-1 — ' RIP -RAP (27" THICK) 47 12 SY VDOT E6-1 RIP -RAP (12" THICK) 544— KEY LEVEL 41 SPREADERINTO EXISTING GRADE 7 SY VDOT #3 STONE—/ (DEPTH VARIES W-24") —541 _ \\ \ 11 t565 PROP. 50-LF 15" HDP�E @ 0.60% 11 1 _ \ SEE SHEET 7 FOR CULVEIIT1/ / r c—32,X48' MAINTENANCE _ \ COMPL S/ M/ 5804 BUILDING- \ ✓ �• / � � ` Ann - I ` 12' WRAP-AROl1ND SHED — — \ 545 578 \ rn 22.2' o ' _ TOBIAS A DENGEL TRUST & I — LYNN T DENGEL TRUST 8 — TMP 62-71 — ZONE: RA 57- _ USE: RURAL AREAS DB 5107 PG 651 20.0' \ LIMITS OF DISTURBANCE = 0.75 AC. DITCH 1 / _ 4 \ \72-LF CLASS Al RIP -RAP / / DITCH (18" THICK) @ 1� / \ � / 56 � 53 52 51 - 55 3 ' DITCH 2A 56-LF RIP -RAP DITCH - VDOT STD EC-1 STONE _ _ ­02" TRICK) @ 16% p — SEEDETAIL THIS SHEET \ — .SEE DETAIL I 50 - _ THIS SHEET-4 — — 49 - 48 — 3 3+ 47 _ —545— , 432 — — --43.- / - 445 0 I-LF 6X6 TREATED / / / 0 — / — — — — ' = 44- MBERS SECURED 44- �t _Viso _ _ 13.0' ITH #4 REBAR- TOP OF / ! / / — _ MBER TO BE FLAT AT \ / / �/ p2� ' f — son S — 540 AN ELEVATION OF 544.0 — _ 453 -QUTFALL #2 ENGINEERED LEVEL SPREADER (ELS) #2 DETAIL V=10' NOTES 1) ELS DETAILS ARE BASED ON DEQ SPECIFICATION NO. 2, FIGURE 2.4, MODIFIED AS SHOWN. 2) ENGINEERED LEVEL SPREADERS #1 AND #2 ARE TO BE PRIVATELY OWNED AND MAINTAINED. REFER TO MAINTENANCE GUIDELINES ON SHEET 6 OF THE PLANS. REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 LNG ENI ENI ERED-LEVEL SPREADER (ELS) #2 _ QLO=0.45 CFS UTFAL #L 1 / � P Sv P 0 2p2� 7olttd T--PR EOY�LENGTH GTTH OF ELS #2 M13' NGINEERED-dEVE�SPREADPFR (EtSj#1 O`I�0eES3 (SEE DETAIL THIS SHEET) /Q10=3.10'CFS / — N S MIN LEN�GHF EL8#1 = 13 x-Q50-40 ROVIDLNF ECS# (SEEIDEJAITI�HEET / \ \ /z 6.30 \ \ \ \ / — 540 __0 / / WATER)RO-fECT10N�� ty GI / PER ALBEMARLE COS / / Z / BUFFER � /� j + / SPRING FE_ SPRING GRADING PLAN 0 20 40 60 SCALE: 1 "=20' EMSCALE ENGINEERING owner: TOBIAS A DENGEL TRUST 1740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC 871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com z J 0. U/ 0 z W L LL J J Z O O LL m I G 0 z 7 O U w J Lu w co Q sheet title: GRADING-SWM PLAN Iscale: 1 "=20' I date: 1 /26/2021 sheet # 5OF7 @ 2021 - 30 LLC ENGINEERED LEVEL SPREADER 1 AND 2 MAINTENANCE GUIDELINES ..\..\..\OneDrive - 30scale\30 Scale Work\CHITS\21.001 -Foothill Farm\WORK\AUTOCAD\IMAGES\MAINTENANC SPECS Page 001.jpg ..\..\..\OneDrive - 30scale\30 Scale Work\CHITS\21.001 - Foothill Farm\WORKWUTOCMlli AGES\MAINTENANC SPECS Page 002.1pg ..\..\..\OneDrive - 30scale\30 Scale WoraCHITS@1.001 - Foothill Page 003.1pg REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 N 0 30 60 90 SCALE: 1 "=30' —� -- -— — — — --- -- --——— — — — — —— - -- L 600 \ — POST -DEVELOPMENT --595 TO CULVERT Tc=10 MIN— \ A=1.39AC.��— \� \ C=0.35 — 110=5.31 IN/HR Q10=2.58 CFS575 — S� Sao- 575, -- 560 Jjr • \ \ \ POST-DEVELOPMENT OVERLAND TO OUTFALL #1 A=0.19 AC. \ \ II \ C=0.50 110=5.311N/HR \ / Q10=0.50 CFS v / , s Am / \\ \ \---------------------------------------- ------------------ 56 - �— 55 — 54 53 / - 51 /50 — / / 49 _ � 48 / 453t 47 46 / A6 `\`v / 'N 442 / - / 440 / — / — — on OUTFALL#3 / 45_ RE CTION IN, SHEET FLOW 1 1 \ — OUTFALL #2 SHEET FLOW OVER ENGINEERED LEVEL SPREADER (ELS) #2 �SgS OUTFALL #1 I SHEET FLOW OVERENGINEER— D LEVEL SPREADER E(ELS) #2 �` \ DRAINAGE DIVIDES y c� AREA TO SEDIMENT TRAP `+, A=1.97 AC. � 1\ \---------- \ �Sa o ei sz \ 57 a ss s I DRAINAGE DIVIDES (SEDIMENT TRAP) SCALE: 1 "=50' TOTAL TO OUTFALL #3 (SHEET FLOW) Tc=5 MIN A=0.21 AC. C=0.50 110=6.64 IN/HR Q10=0.70 CFS TOTAL TO OUTFALL #2 (ELS #2) Tc=5 MIN A=0.20 AC. C=0.42 110=6.64 IN/HR Q10=0.56 CFS PRE -DEVELOPMENT AREA TO SHEET FLOW Tc=10 MIN A=1.99 AC. C=0.35 110=5.31 IN/HR Q10=2.35 CFS Om SCALE ENGINEERING fowner : TOBIAS A DENGEL TRUST 740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC I871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com a O O 0 Z G 0 0 Q O O LL] Z I..L V ) 0 Z w LL J O O LL iiw 3jm Lic. No. 33028 05/04/2021 : title: RAINAGE VIDES 00 co i Q0 111=30' 1 /26/2021 # 6OF7 @2021 - 30 SCALE, LLC Channel Report Hydraflow Express Extension for AulodeskV Civil 3DO by Autodesk. Inc. DITCH 1 Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 1.00 Invert Elev (ft) = 100.00 Slope (%) = 15.00 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 3.10 Elev (ft) 102.00 101.50 101.00 100.50 100.00 99.50 Section DITCH CALCULATIONS Tuesday. May 4 2021 Highlighted Depth (ft) = 0.48 Q (cfs) = 3.100 USE CLASS -USE WAY = 0.46 RIP-RAP V210Cit ft/s = 6.73 Wetted Perim (ft) = 2.15 Crit Depth, Yc (ft) = 0.69 Top Width (ft) = 1.92 EGL (ft) = 1.18 Depth (ft) 2.00 1.50 1.00 0.50 0.00 -0.50 .5 1 1.5 2 2.5 3 3.5 4 4.5 Reach (ft) Channel Report Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. DITCH 2A Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 1.00 Invert Elev (ft) = 100.00 Slope (%) = 16.00 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 0.56 Section Tuesday. May 4 2021 Highlighted Depth (ft) = 0.25 Q (Cfs) = 0.560 USE VDOT Area (sgft) = 0.13 �EC-1 STONE Velocit fUs = 4.48 Wetted Perim (ft) = 1.12 Crit Depth, Yc (ft) = 0.35 Top Width (ft) = 1.00 EGL (ft) = 0.56 9 9 111111111111111_----- a� 100.50 100.00 99.50 .5 1 1.5 2 2.5 3 3.5 4 4.5 5 Reach (ft) Depth (ft) 2.00 1.50 1.60 0.50 0.00 n cn Channel Report Hydraflow Express Extension for AUIOdeskV Civil 3DO by Autodesk. Inc. DITCH 2B Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 1.00 Invert Elev (ft) = 100.00 Slope (%) = 1.50 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 0.40 Elev (ft) 102.00 101.50 r 100.50 100.00 99.50 Section Tuesday. May 4 2021 Highlighted Depth (ft) = 0.35 Q (cfs) = 0.400 USE EC-2 EROSION Area (sgft) = 0.24 CONTROL MATTING Velocit ft/s = 1.63 Wetted Perim (ft) = 1.57 Crit Depth, Yc (ft) = 0.31 Top Width (ft) = 1.40 EGL (ft) = 0.39 Depth (ft) 2.00 1.50 1.00 050 IM1111111111111 n cn .5 1 1.5 2 2.5 3 3.5 4 4.5 5 Reach (ft) Channel Report Hydraflow Express Extension for Autodesk9) Civil 3Des by Autodesk, Inc. DITCH 3 Triangular Side Slopes (z:1) = 2.00, 2.00 Total Depth (ft) = 1.00 Invert Elev (ft) = 100.00 Slope (%) = 1.50 N-Value = 0.030 Calculations Compute by: Known Q Known Q (cfs) = 2.58 Elev (ft) 102.00 101.50 101.00 100.50 100.00 99.50 Section Tuesday. May 4 2021 Highlighted Depth (ft) = 0.69 Q (Cfs) = 2.580 USE EC-2 EROSION Area (sgft) = 0.95 CONTROL MATTING Velocit ft/s = 2.71 Wetted Perim (ft) = 3.09 Crit Depth, Yc (ft) = 0.64 Top Width (ft) = 2.76 EGL (ft) = 0.80 .5 1 1.5 2 2.6 3 3.5 4 45 Reach (ft) Depth (ft) 2.00 1.50 1.00 050 000 -0.50 CULVERT CALCULATIONS Culvert Report Hydraflow Express Extension for AutodeskO Civil 3D& by Autodesk. Inc. Thursday, May 6 2021 15 INCH CULVERT Invert Elev Dn (ft) = 54.00 Calculations Pipe Length (ft) = 50.00 Qmin (cfs) = 4.10 Slope (%) = 0.60 Qmax (cfs) = 4.10 Invert Elev Up (ft) = 54.30 Tailwater Elev (ft) = (dc+D)/2 Rise (in) = 15.0 Shape = Circular Highlighted Span (in) = 15.0 Qtotal (cfs) = 4.10 No. Barrels = 1 Qpipe (cfs) = 4.10 n-Value = 0.012 Qovertop (cfs) = 0.00 Culvert Type = Circular Culvert Veloc Dn (ft/s) = 3.78 Culvert Entrance = Smooth tapered inlet throat Veloc Up (ft/s) = 4.79 Coeff. K,M,c,Y,k = 0.534, 0.555, 0.0196, 0.9, 0.2 HGL Dn (ft) = 55.03 HGL Up (ft) = 55.12 Embankment Hw Elev (ft) = 55.53 Top Elevation (ft) = 56.50 Hw/D (ft) = 0.98 Top Width (ft) = 40.00 Flow Regime = Inlet Control Crest Width (ft) = 30.00 U VICI1CULVERf. NEW AL ML 1 1■ NOAA ATLAS 14 DATA NOAA ATLAS 14 POINT PRECIPITATION FREQUENCY ESTIMATES: VA Sala dUmpnen EMU type: Pr6cglaUon Ml.ns9y v INlld: Entio v lYro N1Nea e7P.: Pram dwalwo v 3al.cr 1.0M. 1 Mamully- aleylo4e9nldecMlrlM9'ew vsa'-•tor8elM W)' L,oMx&Olonf3aldeO 5w1k1 IM 6y alatlon Plat of VA *UIkMa): SoNrt "on v of ay.adrea. �_ ,�„ur,.•., n<,.�.r.,�-.ceF.x Cl, 4 Um m.P(or ESN nbacure,mpnmtwwma,W awom me met hOp.:Nlwrcel..cww,o pie ereww. a, r Uct as W mnc uw»a,er�reae.9ovt. Mp v y ti.LR loctllon � T.rtaln Alma ooa.,urt rw tlauala nn bf Cuck an .talMn Iced Lacatlon inla.mNlen: Nam.: Ct;.I a Ale Nnprw. 1� ISr LatlluW: 3e.0542` ` •a4, Lorgm,dc-]n4251 • � 10„. a.,,.. a,rr °' • so,ucc esKI Mwo, mun saw. -uses POINT PRECIPITATION FREQUENCY (PF) ESTIMATES Wri1190% CONFIDENCE INTERVALS AND 5YPPLEN1ENTWf INFORMATION NOAA Ally. td. Vel.m. 2, V.r.ion 3 PFtabular S Pr•4aa9« PDS-based rec Ration ff satilnalss with 901E cdnfidanea irdar fiats lin inclwalllouf l Ar raanerce inNrvq ara Dumn1 1 z 5 10 o 100 20D SIX) Iwo 44 n64 T,91 0,14 111 932 'a 19.e5mn 4 y2-6.N e13 k7211392461 913 I 16 mn T 6.96 6.49 w9 r" ?.in L33 '9053151 3fr14A71 (415 i231 (4 T8 i871 1533 e5e1 6TT 7.141 15t "1 650814, 1980 75) (719923J 2.e2 s3s 3.9i AU 3M e.47 nee a.:2 c se A97 2543.13j 3e63741 '1-94.411 4924981 '49155fi11 dgfi02 5.198451 640.22 67YT:M) 8.0211, t.93 2.23 da3 2.24 3.T] 4.12 toe 4JM 5.29 5.65 114214) '.10-2.59 2_953.U1 292 J.591 (3.314.121 (3974.691 43.97494 f4263.J3i �e 60 ned 44076.26lool REVISIONS # DESCRIPTION DATE 1 ADDRESS COMMENTS 5/5/2021 m SCALE ENGINEERING fowner:TOBIAS A DENGEL TRUST 740 FOOTHILL FARM DRIVE CHARLOTTESVILLE, VA 22911 engineer: 30 SCALE, LLC I871 JUSTIN DRIVE PALMYRA, VA 22963 p: 434.242.2866 e: mike@30scale.com web: www.30scale.com Z I L v 0a.ar� C) I f_ F000 Z z O Q U m UJ coz Uj � ti N C�C G Z IIIIIIIIIIIIJ O O LU O O LjL 1 LF. S v Lice No. 33028 05/04/2021 !t title: ITCH AND ULVERT ALCULATIONS NONE 1 /26/2021 t # 7OF7