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HomeMy WebLinkAboutWPO202000041 Plan - Revision WPO VSMP 2020-10-21AVON PARK II DEVELOPMENT MILL CREEK VILLAGE c HOMES III GENERAL NOTES OWNER: STANLEY MAR77N COMPANIES LLC 11710 PLAZA AMERICA DRIVE, SUI7E 1100 RESTON, VA 20190 DEVELOPER: STANLEY MARTIN HOMES 404 PEOPLE PLACE, SUITE 303 CHARLOTTESWLLE, VA 22911 ENGINEER: COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOTTESVILLE, VA 22902 (434)293-3719 TAX MAP NO.: 090000-00-00-03100 (DB 5237, PG.405) 1960 AVON STREET EXTENDED CHARLOTTESWLLE, VA 22902 TOTAL AREA: 5.262 ACRES ZONING: PRO PLANNED RESIDEN7AL DEVELOPMENT (ZMA 2012-0004 & ZMA2014-6) A VARIA77ON IS BEING REQUESTED WITH THIS INITIAL SITE PLAN AND PRELIMINARY SUBDIVISION PLAT PROPOSED USE: RESIDENTIAL DEVELOPMENT - TOTAL 30 RESIDEN7AL LOTS 28 SINGLE FAMILY ATTACHED RESIDENTIAL UNITS (TH UNITS) 2 EXIS77NG SINGLE FAMILY DETACHED RESIDENTIAL UNIT DENSITY: ALLOWABLE DENSITY PER ZMA APPLICATI0N PLAN: 6 DU/AC TOTAL ALLOWABLE NUMBER OF LOTS: 30 TOTAL LOTS TOTAL NUMBER OF PROPOSED UNITS. • 30 RESIDENTIAL LOTS PROPOSED VARIATIONS A VARIAT70N TO THE APPROVED APPLICATI0N PLAN IS BEING SOUGHT WITH A WAIVER REQUEST THAT SHALL ACCOMPANY THE REVIEW AND APPROVAL OF THIS INITIAL SITE PLAN AND PRELIMINARY SUBDIVISION PLAT. THE WAIVER SHALL INCLUDE A MODIFICATION TO THE LAYOUT FROM THE ORIGINAL APPLICATION PLAN, A MODIFICATION TO THE ROADWAY NETWORK (BUT WILL KEEP THE SAME ROADWAY CONNECTIONS), A MODIFICATION TO THE SETBACKS (BASED ON THE ROADWAY CHANGES), AND A MODIFICATION TO THE 77MING OF THE INSTALLATION OF THE LANDSCAPING BUFFER AREAS AND SCRIM FENCE. OPEN SPACE.• TOTAL OPEN SPACE PROPOSED = 1.328 AC (25.2%) OPEN SPACE A: 6,850 SF OPEN SPACE B: 50,999 SF TOTAL OPEN SPACE REQUIRED (259) = 1.316 ACRES OPEN SPACE TO BE OWNED AND MAINTAINED BY THE HOMEOWNERS ASSOCIATION. ALL OPEN SPACE SHALL BE RESERVED IN A DEED FOR 774E COMMON USE OF LOT OWNERS IN THE SUBDIVISION AND NO OPEN SPACE IS PROPOSED TO BE DEDICATED PUBLIC SPACE. BUILDING HEIGHTS: MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 30 FEET RECREATIONAL AMENITIES PER PROFFER #8, THE OWNER SHALL PROVIDE AND INSTALL A 40'x5O' FENCED DOG PARK WITH (2) SMALL BENCHES AND (2) ADDITIONAL PLAY STRUCTURES FOR OLDER CHILDREN IN THE EXISTING TOT LOT AREA ON 7MP09OFO-00-00-OOA1, OWNED BY THE AVON PARK COMMUNITY ASSOCIATION. SETBACKS: FRONT. • 10' MINIMUM (18' MINIMUM FROM R/W OR EDGE OF SIDEWALK TO GARAGE) SIDE. • NONE - MIN. 10' BUILDING SEPARATION REAR: 5' MINIMUM (ADJACENT TO OPEN SPACE) 15' MINIMUM (ADJACENT TO A PROPERTY LINE) SUBDIVISION STREETS: CURB & GUTTER WATERSHED: RIVANNA RIVER DRAINAGE DISTRICT - NOTE.- THIS SITE IS NOT LOCATED WITHIN A PUBLIC WATER SUPPLY RESERVOIR WATERSHED. AGRICULTURAL/ FORESTAL DISTRICT.- NONE TOPO & SURVEY.- THE BOUNDARY LINE AND PARCEL INFORMA7ON WAS PROVIDED BY ROUDABUSH, GALE AND ASSOCIATES MAY 201& THE TOPOGRAPHY INFORMATION IS BASED ON FIELD SURVEY COLLECTED IN MAY 2010. THE PROPERTY IS CURRENTLY BE SURVEYED FOR UPDATED TOPOGRAPHY FOR THE FINAL SITE PLAN. INFORMATION FIELD VERIFIED BY COLLINS ENGINEERING MARCH 2O20. DATUM: NAD 83 EXISTING VEGETATION: PARTIALLY WOODED WITH (2) RESIDENCES ON THE PROPERTY AND EXISTING GRAVEL DRIVEWAYS. LIGHTING: NO STREET LIGHTING IS PROPOSED WITH THE DEVELOPMENT. PARKING: PARKING REQUIRED: 2 SPACES PER UNIT + (1 SPACE PER 4 SFA UNITS) 28 SFA UNITS + 2 SFD UNITS = 60 OFF-STREET PARKING SPACES 7 ON-STREET/SURFACE PARKING SPACES TOTAL PARKING SPACES REQUIRED: 67 SPACES PARKING SPACES PROVIDED (MINIMUM (1) DRIVEWAY SPACE + (1) GARAGE SPACE): OFF-STREET PARKING SPACES: (2) SPACES PER LOT = 60 SPACES ON-STREET/SURFACE PARKING SPACES PROVIDED FOR GUEST PARKING = 21 SPACES TOTAL PARKING SPACES PROVIDED: 81 TOTAL PARKING SPACES PHASING: T741S PROPERTY SHALL BE DEVELOPED WITHIN 1 PHASE. BUILDING SITES PARCELS 1-30 EACH CONTAIN A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENTS OF SECT70N 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. BURIAL SITES: NO KNOWN CEMETERIES EXISTS ON THE PROPERTY. STREAM BUFFERS: THERE ARE NO WPO 100' STREAM BUFFERS ON THIS PROPERTY. ANY STREAM BUFFER SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE. WETLANDS/STREAMS. THERE ARE NO WETLANDS OR STREAMS LOCATED ON THE PROPERTY. FLOODPLAIN: THE PROPERTY LIES IN AN AREA DESIGNATED AS ZONE X AS SHOWN ON THE FLOOD INSURANCE RATE MAP COMMUNITY PANEL NO. 51003C0407D, DATED FEBRUARY 4, 2005. CRITICAL SLOPES THERE ARE PRESERVED SLOPES ON THE PROPERTY. MANAGED SLOPES ARE SHOWN ON THE PROPERTY BASED ON THE ALBEMARLE COUNTY GIS MAPPING FOR THIS PARCEL. THESE MANAGED SLOPES ARE SHOWN ON SHEET 2 AND SHEET 4 AND SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY ZONING REQUIREMENTS. RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WITH THE DEVELOPMENT. LANDSCAPING: STREET TREES ARE PROPOSED ALONG THE NEIGHBORHOOD STREETS IN ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS WITHIN SECT70N 32.7.9 OF THE COUNTY CODE. IN ADDITIONAL, LANDSCAPING BUFFERS SHALL BE PROVIDED ALONG THE BOUNDARY OF THE PROPERTY IN ACCORDANCE WITH THE APPROVED APPLICATION PLAN AND PROFFERS. SEE THIS SHEET AND SHEET 3 FOR ADDIT70NAL INFORMATI0N ON THE REQUIRED AND PROPOSED LANDSCAPING BUFFERS. ALL LANDSCAPING BUFFER AREAS SHALL BE INSTALLED PRIOR TO THE FIRST CERTIFICATE OF OCCUPANCY. TRASH: EACH LOT SHALL HAVE AN INDIVIDUAL TRASH CONTAINER TO BE STORED WITHIN THE GARAGE. STORMWATER MANAGEMENT • ONE UNDERGROUND DETENT70N FACILITY AND A DETENT70N POND ARE PROPOSED WITH THE DEVELOPMENT TO ACCOMMODATE THE WATER QUANTITY REQUIREMENT FOR THE PROJECT. WATER QUALITY SHALL ACCOMPLISHED WITH THE PURCHASE OF NUTRIENT CRED1 IS. VSMP PLAN (WP0202000041) SCOTTSVILLE DISTRICT ALBEMARLE COUNTY, VIRGINIA N/F JENNIFERIL —IC— CERARDI �� 1 DB 4757 PC 433 w aTMP 0>r�-Tv 90E-A2N/F ALBEMARLE COUNTYSERVICE AUTHORITY DB 3571 PC 272 2 I' LQT II -43T2 "------OLOT 9 LOT 10 7 LOT 1 I ' 11 ILOT 14 115 IMP 90-30 N/F CARY D BROOKS JR DB 4858 PC 406 GRAPHIC SCALE IMP 90E-6 '' .aboa�g9a N/F DANEIL I +y.. SHUMATE I DB 4091 PC 534 I I I IMP 90E-7 I I ;IMP 90E-9 IMP 90F 8 N/F IAN FARIS N I If,/F DENNIS OR N/F ICNACI OR DB 4163 PC 261 ZINDA V OCONNOR TARA L D \. I Dl§ 4184 PC 210 CARDENA IMP 90E-Al ':r b DB PC 77 N/F AVON PARK i COMMUNITY ASSOCIATION INC C/0 _ - REAL PROPERTY INC = --- DB 3692 PC 319 T --L SIT VON PARK VICINITY MAP SCALE: 1" = 2000' IMP 90-32A N/F ROBERT SPAULS DB 982 PC 365 ----�=T =r T=t---- :::::::::. ,.::::rr;C�rr = 'r '. ' '.TL'r ir'.;r'ri`i :'7'r 4'' 'rii`'.'`�ii'.i zi`. i:;' —T T 28 T62 TLOT 20T / IMPERVIOUS AREAS: THE TOTAL OVERALL SITE IMPERVIOUS AREA CAN NOT EXCEED 377, PER THE APPROVED ZMA APPLICA7ON PLAN: ROADS: 0.63 AC (PAVED CIRCULATION PARKING AREA = 27,380 SF) SIDEWALKS: 0.11 AC BUILDINGS/DRIVEWAYS 1.12 AC TOTAL: 1.86 AC (35.39 IMPERVIOUS AREA) PROPOSED USES: LOTS: 127,162 SF (2.919 AC) ROADS (R/W & PRIVATE ACCESS ESMT): 44,200 SF (1.015 AC) OPEN SPACE: 57,849 SF (1.328 AC) OFFSITE EASEMEN T• ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR WITHIN EXISTING RIGHT-OF-WAY. THERE ARE ALSO EXIS77NG OFFSITE EASEMENTS FOR THE ROADWAY AND U77LITY CONNECTIONS TO THE AVON PARK DEVELOPMENT. 20 TMP 90-30A N/F CARY D OR MYRTLE T BROOKS DB 1191 PC 396 Ll NOTES.• 1) THIS PROPERTY DOES NOT LIE WITHIN AN AGRICULTURAL AND/OR FOREST DISTRICT. 2) ONLY (1) DWELLING PER LOT SHALL BE PERMITTED. 3) ALL PROPOSED EASEMENTS SHALL BE DEDICATED TO PUBLIC USE. 4) STREET TREES SHALL BE PROVIDED ALONG ALL THE PUBLIC STREETS 40' O.C. IN ACCORDANCE WITH VDOT AND ALBEMARLE COUNTY STANDARDS. 5) THIS PROPERTY IS NOT LOCATED WITHIN A DAM INUNDATION ZONE. LOT 39 3v,zVU sF 0.83 ACRES qD rmr au-aQB N/F JOHN A OR RUBY T BROOKS DB 1191 PC 396 Sheet List Table Sheet Number Sheet Title 1 COVER SHEET 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NARRATIVE 4 EROSION & SEDIMENT CONTROL DETAILS 5 PHASE I - EROSION & SEDIMENT CONTROL PLAN 6 PHASE IIA - EROSION & SEDIMENT CONTROL PLAN 7 PHASE IIB - EROSION & SEDIMENT CONTROL PLAN 8 PHASE IIC - EROSION & SEDIMENT CONTROL PLAN 9 PHASE III - EROSION & SEDIMENT CONTROL PLAN 10 EROSION & SEDIMENT CONTROL DETAILS & CALCULATIONS 11 STORMWATER MANAGEMENT PLAN 12 STORMWATER MANAGEMENT DETAILS 13 STORMWATER MANAGEMENT DETAILS 14 STORMWATER MANAGEMENT DETAILS 15 OVERLOT GRADING PLAN 15 TOTAL NUMBER OF SHEETS Lic. No. 035791 � O��SIONAL E�Oti� r z w ,A U z z o a a z = o O mU U = w J w � J Q Q � Z o w m U) z LU a �W/ li N w l7 E Uj E J J U) I n z ILU j fy .J LU J ® O O N Q � F- 0— w r nZ w V\/ 1 w �1 O � U Q F w F w o w a � JOB NO. 112066 SCALE lit =50' SHEET NO. 1 V \ 1 1 H�0 (j:SCLI SCOTNo 035 7 10/1920 /�SSJOA I I I I I I II I v vAr v v v v \ v 1 1 I \ v I I I ✓ / I/ I I I I I I I I I I I I \-' \ \ \ II I �\ \\\ \/ 1 \ \ \ \ I > � \ Lr) \ I � o z Z0� U ca Lu o Z F-- w rS///// 0�mQ wz WwTMP 90F4 I I I I BUILDING DESCRIPT/ / / / / � `^ I/ / �i/> SANITARY SEWER V INIF I DAN I I I I l l // / / / i / a�C / A \ EASEMENT \ V I I I AI 1 8 x 2 STOR VINM y v v V v SHUMAlE1 / I / /I I BRICK HOUSE ON B SEMENT EASEMENING EXISTING a8' \ DB. 3291 PG. 607 \ I DB. 3291 PG. 607 _ n (� i E/P E/P zo'GRADING \ \ �B 409 / f EASEMENT v A V v I I 24 X24 CONCRETE/ / / /Ic EXISTING 3Y \ V I / e r / / / 692 DB. 3�gn PG. 607 \ \ TMP 90E-7 \ I Cb MUNIT'YI I I l / / \ \ lilt� Ih ��I FIc-F/c � i IC. 2 x32 CONCRETE �AB� / TMP 90-�32A TMP 90E-9 TMP 90E-8 \ N/F IAN FARIS \ V I I �1S,$OCIATION qN CJ�O 1 I I e i - / a TDB 4163 PG 261 \ I 1 RtAL PROPERTY INC D. 20 x20 1/STORY VIN) /� NIF ROBERT, SPA�ILS ¢'CONNOR LIVING N/F IGNACIO 0 \ V I I BI 3$92' PC 19 1 I I I / / % / / I TRUST TARa L DE 1 I p p / B ILDIhVG ON BA� NT�� / / / 982 �G 36b / TMP 90E-�12 � �o y � � 9 � � i B 5116 PC 289 DB 4060 PC 77 I I TMP �0p� Ail � I I / I � // / � ti �� 4 q / I Opp / / � II I I I N F AL�EMARLE COUNTY b y i I J I FI AIV� ��Rl� 0- 1 SERVICE AUTHORITY / / 1 / �o / DB 3571 PG 272 i / / / i / It �o� I 0 0 ry 0 %i �/ / / I j M 11 / / i66 �� o o �/ 50 N / / / // o 0 v OVEN WIRE v / / I o 0 0 m o N G 6 96 6 66� 6z o 0 I I I m ry / / / h h h / / w 6 ^ 61 /\ // v ry ID � 0 m m / N �0 9� F III 2 / / / I° b 65 6h h`� �� 'I P� \ �1 // a o v / / / o N S58'48'09'E 14.92' 8'07� 485. 8' 31° 2'0 "W 3�10'A / / / / �y / i — IF / / / 00 I d v X� X— X—� X_ V v / T51°E �310. ff �' i / BE v X— X— X— A I — 0 / / / / i / 200' N29°06'41 E 9.00' \( X— X X X 4— X I I w cs PR PERTY A V A 1 I 1 \ \ / I I \ I I I V- I I I I I I I 1 I I I I I I I I wQvEN wIR� I I I I I I I 1 `)-IN II S� TY1P. A V A / I EXISTING FENCE I I I FE CE 1( I I L9 M I I I I I I I I I � I I 24' IMP I I I I TO B REMOVED um TY EASEMENT \ I I P DB.425 PG.46 / D� 423 PG.572 \ J 1 \ / 3561 PG.468 \ TMP 90 -31, \ \ \ 1 \ ��/ I � I \ \ � � � � / ' I I I I ' \ � c'� I \ \\ \I 1 II 1229,2115.262 ASF \ \ �I B. rn a I I I EXI \ \ \ \o o I I I 1 5TIN 1 KENf�EL I \ \ \ I I I X \ \ \ \ I G 10'X20' \ a 1 I EIS NG EN 77 \ Cam' TO BE REMOVED I A I I I I 1 I I I I I I Tq BE�Ef VE V A MA TIN WEL / A\ 1 A A IN SEMENT \ I I 1 \ / I OR AI I \ \ \ \ RIGK IWA L I V Av v CONCRETEF 5 4 I 1 I v M v v A M w o I I \ A \ V A A V A A A A \\ \ A\ D13.3561 PG. 68 \ \ \ \ \KE NEL \ \ \ \ \ \ \ _ To B VA \ I I I I ova I I I M ^l � ( \ v v v v vv � v v N I �A I l�SPIALT � �� v X I � I I /' \\ N �o� V I 0�ti V I V A \ vv v O ati� \FAIXCET I I VCONCIkET� g�l '----� / I I I 111� A. v \ �/ v v �� v� v� vv / A �Id I Q 00 z�l ' 1968 I I I �� vv v v \ v vv v v v A l \ XISTIN H METOREMAIN k 4 I/ v \ v ONCR TE v \ v vv A v v \ V I W \� N J I I / \ I y� / I I \ RAVE \ \ \ s 0 0 co ev m `^ I I (n +0.�' WOVEN v� \�� / I V -- —I o o 0 ry 0 m 0) s mm r fi I O o O o O a? \ 1 LLJ I- i vv ----/ IF1N MON x I I I / � I I IIF IN oN I I O O ��� I PLANTER -I F I WIRE FENCE OVER vV v Or LINE1/1 IF I v V� 0.281 `I TP I\ I `/' /�I P1O. \ O PROPERTY LIN� v \ v / I \ I o 1 r m 6 y I I I ` \I I \ P / \ \ V °°0 86 �8� ° o' �� ��. 0 0 6 n ^ � �� o o a n o ro 0 v n o mrn m m m W 1p N N °v rv° — A I/ / // X Q_ 69 t0 �o 0 0 o t o b / / / I I AI// ���o_ l l < v WOVEN WIRE _ / U \ TMP 90-30 / � ---F€NC Ci //// \ �//}� / ' II I / JOHN A OR RUBY T BROOKS I \ \N/F GARY D BROOKS JR / 4.3 WOVEN I I I _ / / / / / 1 \ � 4858 PG 406 / / / % 1 I I I I I / / / / / iy�p� , / / \ v PERT //// OPER�Y BONER / I/ I I I I � DB 1191 PC 396 / /N Lu TMP )MYRh mI I — I /F CA�Y D OR IMYR�'LE -I BROOKS I I I I I I ' / / / / / / I I —-- / / / , DB 11 1 PG 396 I I I I / I / /'// /' / � Lu Lu (n W Q // / / /////' I I I I II o l / //// / I' l l l i I i I i II 1 \� 1 ® o 1 vv EXISTING MANAGED STEEP LOPES l /l /l /l l/ / / l / / / / / / i /l i I I v v v GT�APHIC SCAEE // / // / /40 / / / / 20 / 40 / 6 vIN / /i inch 40 �/ W En JOB NO. 112066 SCALE 1" _ 40' SHEET NO. 2 1992 EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING: 3.01 SAFETY FENCE.• A PROTEC7VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY 774E PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE K1774 A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON 774E PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. 3.05 SILT FENCE: A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE 774E VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. 774E SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED /N ACCORDANCE NTH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION: A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07ECTON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT STABILIZA7ON OF 774E CORRESPONDING DISTURBED DRAINAGE AREA. 3.08 CULVERT INLET PROTECTION: A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM CULVERT. TO PREVENT SEDIMENT FROM ENTERING STORM CULVERTS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07ECT70N APPLIES WHERE STORM CULVERTS ARE EXIS77NG OR TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.• A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON S17F DURING CONSTRUCTION. 774ESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MON774S OR LESS, WHICH CAN BE PROLONGED W774 PROPER MAINTENANCE. 3.12 DIVERSION: A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPORTING EAR774EN RIDGE ON 774E LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON -EROSIVE VELOCITIES. APPLIES WHERE RUNOFF FROM AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENG774 NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. 3.13 TEMPORARY SEDIMENT TRAP. - A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF 774E SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WLL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE. 3.14 TEMPORARY SEDIMENT BASIN: A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAK TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR 774E MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. 3.18 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR 07HER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PR07ECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE P07EN77AL FOR INFILTRATION, AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 3.20 ROCK CHECK DAMS: SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRACTICE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF THE STORMWATER RUNOFF. THIS PRACTICE, UTILIZING A COMBINATION OF STONE SIZES, IS LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS 3.31 TEMPORARY SEEDING: THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WLL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETA7ON OR 07HER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION. THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WLDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WLL RECEIVE A PERMANENT VEGETATIVE COVER. 3.35 MULCHING, APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PR07EC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETA7ON BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWNG SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER K17H PLANTINGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZATION BY THEMSELVES, CAN BE USED IN CON✓UNC77ON K17H TEMPORARY SEEDING. 337 TREES. SHRUBS VINES & GROUND COVERS: STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETATIVE COVER WTH TREES, SHRUBS, VINES, OR GROUND COVERS. TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WLDLIFE WHERE WLDLIFE HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE 77JRF ESTABLISHMENT IS DIFFICULT, ON STEEP OR ROCKY SLOPES WHERE MONNG IS NOT FEASIBLE, WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR TO ESTABLISH WLDLIFE HABITAT. 3.36 BLANKET MATING: INSTALLATION OF A PROTECTIVE COVERING OR A SOIL STABILIZATION MAT ON A PREPARED PLANING AREA OF A STEEP SLOPE OR CHANNEL TO AID IN THE CONTROLLING EROSION ON CRITICAL AREAS. 3.38 TREE PRESERVATION AND PROTECTION. PR07EC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WLL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACIVIIES 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE NTH THE VESCH. 3.32 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% -p Perennial Ryegrass Improved m r P r nnial R e toss 0.5% - Kentucky Bluegrass 0.5% High -Maintenance Lawn 200-250lbs. - Kentucky 31 or Turf -Type Tall Fescue 100% General Sl%& (3:1 or less) . Kentucky 31 Fescue 128 lbs. . Red Top Grass 2 lbs. - Seasonal Nurse Crop* .20 lbs. 150 lbs. Low -Maintenance Slope (Steeoer than 3:1) - Kentucky 31 Fescue 108 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crop* 20 III - Crownvetch ie 20 lbs. 150 lbs. • Use seasonal nurse crop in accordance with seeding dates as stated below: F 1 h through Aril ................ . Annual R February 6t t ou rY gh P Ye 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 Fartnville, Va. (May through September use hulled Sericea, all other periods, use unhulled Sericea). If Flatpea is used in lieu of Crownvetch, increase rate to 30lbs./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. TABLE 331-A LMUNG REQUIREMENTS FOR TEMPORARY SITES Recommended Application pH Test of Aoiculnual Limestone below 4.2 3 tons per acre 42 to 5.2 2 tole per acre 52 to 6 1 ton per ane TABLE "I-B ACCEPTABLE TEMPORARY SEEDING PLANE MATERIAL& -QUICK REFERENCE FOR ALL REGIONS" Rate ]%.n Dve, s.d� tlaL.,B ) Sept. I - Feb. 15 50/50 M4 M Annual RM. a,Iaum mnw-nnmmi & so-100 CaW(w ta)Rye (s.�.._. .) Feb.16 - Apr. 30 A .0 Rye . 60 - 100 n„m,m multi-rf„nm) May 1. Aug 31 German MOla M GENERAL SLOPE (3:1 OR LESS) TOTAL LBS PER ACRE KENTUCKY 31 FESCUE 128 LBS RED TOP GRASS 2 LBS SEASONAL NURSE CROP 20 LBS 150 LBS SEASONAL NURSE CROP FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. PERMANENT SEEDING SCHEDULE PS NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) EROSION CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTCES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS I/R 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-2: 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. ES-3:ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE S1TE AT ALL TIMES. ES-5: PRIOR TO COMMENCING LAND DISTURBING ACT7077ES 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. ES-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. ES-7.•ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL 77MES DURING LAND DISTURBING AC77WTIES AND DURING SITE DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. ES-8. DURING DEWA7ERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES-9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 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 specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625-02-00 Erosion and Sediment Control 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 or 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 7:00am to 9:00pm. 15. Borrow, fill or waste activity shall be conducted in a safe manner than 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 o 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. 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 lbs/acre, and in the months of September to February to consist a 50150 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye, cr May through August to consist of German Millet. Straw mulch is to be applied at 80lbs/100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 1000lbs/acre and consist of a 10-20-10 nutrient mix. Permanent seeding shall be applied at 180lbs/acre and consist of 95% Kentucky 31 or Tall Fescue and 0-5%D Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be applied at 80lbs/100sf. Alternatives are subject to approved by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to he repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17-204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17- 207B) I1J(1?1' I ' TJ(a(i]1,T1d ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF TIME SHALL BE SEEDED WIN FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR AND WLL BE APPLIED TO DISTURBED AIRES THAT WILL NOT BE BROUGHT TO FINAL GRADE WTHIN 30 DAYS. PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SI7E CONDITIONS FROM TABLES 3.31B AND 3.31C. N07E THAT TABLE 3.31B PRESENTS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE CONDITIONS, • TABLE 331C PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT MATERIALS. TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND GROW. SEEDBED PREPARATION IS ESSENTIAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY SEEDING. TABLE 331A MAY BE USED TO DETERMINE THE ACTUAL NEED ALONG KITH SUGGESTED APPLICATION RA TES: FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1,000 SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR OTHER ACCEPTABLE MEANS. TRACKING KITH BULLDOZER CLEATS IS MOST EFFECTIVE ON SANDY SOILS. THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION OF THE SOIL SURFACE, ESPECIALLY IN CLAYEY SOILS, AND DOES NOT AID PLANT GROWTH AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING. SEED SHALL BE EVENLY APPLIED NTH A BROADCAST SEEDER, DRILL, CULTIPACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 11 INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. 07HER GRASSES AND LEGUMES SHOULD BE PLANTED FROM 4 INCH TO J DEEP. SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. 335, EXCEPT THAT HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED ADEQUATE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS. AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES: IT IS AN77CIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXISTING SEDIMENT BASINS, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIO77ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS SELECT70N OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. CONSTRUCTION ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. SILT FENCE., A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECT70N OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE7ON OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. TEMPORARY SEEDING THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-SI7E AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. TEMPORARY DIVERSION DIKE.• A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS OFF -SITE RUNOFF AWAY FROM UNPR07ECTED SLOPES AND TO A STABILIZED OUTLET, OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIVE IS 18 MONTHS. ROCK CHECK DAMS: SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF THE SWALE OR DITCH. LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS, • SHOULD NOT BE USED IN LIVE STREAMS. STORM DRAIN INLET PROTECTION. THE INSTALLATION OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA; LIMITED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE, CONCENTRATED STORMWATER FLOWS. TEMPORARY SEDIMENT TRAP. A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT NTH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR ENOUGH TIME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. TEMPORARY SEDIMENT BASIN: A TEMPORARY BARRIER OR DAM NTH CONTROLLED STORMWATER RELEASE STRUCTURES WHICH IS FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE CONSTRUCTED ONLY WHERE 774ERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM EFFEC7VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PROFESSIONAL. OUTLET PROTECTION. THE INSTALLATION OF RIPRAP CHANNEL SECTIONS AND/OR STILLING BASINS BELOW STORM DRAIN OUTLETS TO REDUCE EROSION AND UNDER -CUTTING FROM SCOURING AT OUTLETS AND TO REDUCE FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS. CULVERT INLET PROTECTION. A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT FROM ENTERING, ACCUMULATING IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVATIONS AND DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. SAFETY FENCE.• A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. PERMANENT STABILIZATION. PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT CONTROL NARRATIVE. AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF THE FOLLOWING. - TOP SOIL - 2' DEPTH LIME - 2 TONS/ACRE PURPOSE.• THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO GRADE THE SPRING HILL VILLAGE SITE FOR FUTURE DEVELOPMENT. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 4.25 ACRES. EXISTING SITE CONDITIONS: PART OF THIS SITE HAS A WOODS GRASS COMBINAT70N AND SLOPES TO THE SOUTH-EAST THE SITE IS LOCATED TO THE NORTH OF AVON STREET EXTENDED. THE MAJORITY OF THE SITE DRAINS TO AN EXISTING ROADSIDE DITCH OFF OF AVON STREET EXTENDED WHILE THE BACK WESTERN PORTION OF THE SITE DRAINS OFFSITE CURRENTLY, THERE IS (1) EXISTING HOUSE ON THE PROPERTY THAT WILL REMAIN AND EXISTING CONCRETE SLABS AND STRUCTURES TO REMAIN. ADJACENT AREAS: THIS SITE IS BORDERED TO THE EAST BY AVON STREET EXTENDED AND TO THE WEST BY VIRGINIA CONSERVATION LAND. RESIDENTIAL DWELLINGS EXIST TO THE NORTH AND SOUTH. OFFSITE LAND DISTURBANCE. IMPROVEMENTS TO BE MADE WITHIN THE VDOT RIGHT-OF-WAY ALONG AVON STREET EXTENDED AND A CONNECTION TO EXISTING VDOT RIGHT-OF-WAY HATHAWAT STREET. CRITICAL AREAS. TREE PROTECTION FENCING AND SILT FENCE SHALL BE MAINTAINED ALONG THE PROPERTY LINES TO THE EAST, NORTH, AND SOUTH OF THE SITE TO PROTECT THE ADJACENT PROPERTIES CONTRACTOR SHALL ENSURE THAT ALL SEDIMENT MAINTENANCE CONTROLS ARE ALONG AVON STREET EXTENDED TO ENSURE THAT NO SEDIMENT LEAVES THE SITE AND DRAINS ONTO AVON STREET EXTENDED. SOILS SOILS MAP IS INCORPORATED INTO EROSION CONTROL PLAN PHASE l WITH SOILS DATA INCLUDED WITH THIS NARRATIVE. SEQUENCE OF CONSTRUCTION: PHASE l: 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED. 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE PROTECTION FENCING SHALL BE INSTALLED. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT 4. THE PROPOSED CONSTRUCTION ENTRANCE WITH WASH AREAS SHALL BE INSTALLED AS SHOWN ON THE PLANS. THE CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCT70N VEHICLE ROUTES INTERSECT PAVED 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 PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 5. INSTALL THE INITIAL CONSTRUCT70N MEASURES AS SHOWN ON THE PHASE I EROSION CONTROL SHEET. THIS INCLUDES (2) SEDIMENT TRAPS, WIRE SILT FENCE, AND DIVERSION DIKES. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DIS77JRBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. ONCE ALL THE PHASE I EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PHASE I PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN THE MINIMUM GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. GRADING ALONG THE PERIMETER OF THE SITE THAT BACKS UP TO AVON PARK I IS OF PRIORITY FOR INSTALLATION OF SCRIM FENCE AND LANDSCAPE BUFFERING BEFORE ANY OTHER GRADING OPERATIONS. 7. 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 (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZAT70N SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. PHASE IIA: 8. THE FIRST PART OF PHASE I1A SHALL BE TO CONSTRUCT THE OUTFALL OF SEDIMENT BASIN 1. THE SEDIMENT BASIN SHALL OUTFALL ALONG THE OUTLET PROTECTION (RIPRAP) INTO THE EXISTING ROADSIDE DITCH ALONG AVON STREET EXTENDED. ONCE STR-3A HAS BEEN INSTALLED THE CONTRACTOR SHALL TIE THE TEMPORARY BARREL INTO THE PERMANENT STR-3A.ONCE OUTFALL IS CONSTRUCTED, SEDIMENT TRAP 1 CAN BE CONVERTED TO SEDIMENT BASIN 1. 9. ONCE SEDIMENT BASIN 1 HAS BEEN APPROVED BY INSPECTOR, THE CONTRACTOR CAN BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE EROSION CONTROL PHASE 11A PLAN. IO.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 (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. PHASE LIB: 11. AFTER ROUGH GRADING OPERATIONS ARE COMPLETE, CONTRACTOR CAN BEGIN INSTALLING THE ROAD AND DRAINAGE STRUCTURES AS SHOWN ON THE PLAN. INLET PROTECT70N SHALL BE INSTALLED AS SHOWN ON THE PLAN. DRAINAGE STRUCTURES SHALL OUTFALL INTO THE SEDIMENT BASIN UNTIL THE SITE IS STABILIZED. 12.SEDIMENT TRAP 2 SHALL BE UPSIZED TO SEDIMENT TRAP 3 ONCE SEDIMENT BASIN 1 INSTALLATION IS COMPLETE AND APPROVED. PHASE TIC: 13AT THIS POINT THE CONTRACTOR, CAN INSTALL PERIMETER CONTROLS AROUND THE LOWER PORTION OF THE SITE, INCLUDING WIRE SILT FENCE AND TREE PROTECTION. ONCE PHASE TIC EROSION CONTROLS HAVE BEEN INSTALLED AS SHOWN ON THE PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS ALONG THE ASPHALT EMERGENCY ACCESS ROAD/DRIVEWAY ON THE LOWER PORTION OF THE SITE. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. 14. AS THE ROAD IS CONSTRUCTED, THE CONTRACTOR IS TO ENSURE THE EXISTING SINGLE FAMILY HOME HAS ACCESS TO AVON STREET EXTENDED. THE CONTRACTOR SHALL ALSO ENSURE THE SAFETY FENCE AND WIRE SILT FENCE SHALL SURROUND THE PORTION OF THIS LOT THAT IS NOT TO BE DISTURBED. 15. 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 (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. PHASE Ill: 16.ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE THE SEDIMENT BASIN AND SEDIMENT TRAP. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. AT THE TIME OF TEMPORARY SEDIMENT BASIN #1 "S REMOVAL AND THE INSTALLATION OF THE PERMANENT STORM SEWER SYSTEM, THE CONTRACTOR SHALL REMOVE THE TEMPORARY BARREL CONNECTION INTO PERMANENT STR-3A AND PLUG ITS OPENING WATERTIGHT. f7 17MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE NTH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 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 LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. FERTILIZER - 600 LBS/ACRE OF 15-30-15 SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE SOIL DESCRIPTION PARK KENTUCKY BLUEGRASS, 15 LBS/ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE 71B -RABUN CLAY LOAM-2X TO 79 SLOPES. THESE DEEP, WELL DRAINED SOILS ARE FOUND ON PERENNIAL AFTER THESE AREAS ARE STABILIZED THEY WILL BE MOWED AND MAINTAINED GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. MODERATE TO RAPID RUNOFF, NTH ON A REGULAR BASIS. MODERATE PERMEABILITY. MAINTENANCE. 71C -RABUN AY LOAM-79' T 1 9 SLOPES. THESE DEEP WELL DRAINED OILS ARE FOUND N BU CLAY a 0 Sa SLO ES ESE E E S OU D O IN GENERAL ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. RAPID RUNOFF KITH MODERATE AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTENTION WILL BE GIVEN TO THE PERMEABILITY. FOLLOWING ITEMS. - A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN 72C3 - RABUN CLAY LOAM-79; TO 159; SLOPES. THESE DEEP, WELL DRAINED SOILS ARE FOUND ON ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. GENTLY SLOPING TO STEEP RIDGES AND MOUNTAIN SLOPES. MODERATE TO RAPID RUNOFF, B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WITH MODERATE PERMEABILITY. KILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR STORMWATER RUN-OFF CONSIDERATIONS. DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE STORMWA7ER MANAGEMENT. THE STORMWATER RUNOFF FROM THIS PROJECT DRAINS TEMPORARILY TO REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE THE SEDIMENT BASIN & TRAP. THE SEDIMENT BASIN AND THE SEDIMENT TRAP WILL BE REMOVED AFTER TOP OF THE BARRIER. THE DEVELOPMENT OF THE AVON PARK H PROJECT. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. V) Z 0 O Ok: ~Ln w VI o z o \ / m > Ww ��// UJ ItttL iCOTT/R. CU•LLINSZ Lic. No. 035791,E 08/27/20 _47J J r f on to J a r z F N o � 00 W Ul Z J J 0 (3) 7- [` M M N 4 M Nt N CD N (N > LU J_ > U) LU F- F- O = U I Y LU F- U) LU LU U) F- LU O O (N z Q 0- CL v ��G I 1 z O Q LU F- 9 Q Z J O F- O U z LU 0 LJJ U) O6 z O UO LU P U � W w U) a JOB NO. 112066 SCALE AS NOTED _ - SHEET NO. 3 Pu%td construction entrance for crosion control plans 1992 3.05 1992 3.05 1992 3.07 �TH OF ESC PROFFERS STONE 70, MIN. CONSTRUCTION OF A SILT FENCE CONSTRUCTION OF A SILT FENCE GRAVEL CURB INLET SEDIMENT O f'� CONSTRUCTION (WITH WIRE SUPPORT) (WITHOUT WIRE SUPPORT) 4) EROSION AND SEDIMENT CONTROL AccEsS 3" SM-2A ASPHALT Too FILTERSCOTT R. LLINS Z COURSE 1. SET POSTS AMID EXCAVATE A 4"%4" 2. STAPLE WIRE FENCING TO THE POSTS. 1. SET THE STAKES. 2. EXCAVATE A 47X 4" TRENCH O EXISTING TRENCH UPSLOPE ALONG THE LINE UPSLOPE ALONG THE LINE OF U Lic. No. 035791,E The Owner shall provide additional erosion and sediment control measures beyond the standard regulatory 2z 2x PAVEMENT OF POSTS. STAKES. requirements stated in the Virginia Erosion and Sediment Control Handbook (VESCH) applicable on the date SECOWWW00 CWgMgW"p5'MAX. 1_�_ 0� 10/19/20 cQ of approval of this Proffer Statement. These additional measures shall consist of the following: 6o��SS I D EEOti • MN. 2'A AGGREGATE nASEjj���y� ma a) Silt Fencing (VESCH Standard 3.05): PROFILE Z i) Contributing drainage area to non -wire reinforced silt fence shall be reduced from one quarter (0.25) - I _ 70' MIN. IIII 1 II FLOW � - � - '- - z_ acre per 100 feet of silt fence length to two tenths (.20) per ] 00 feet of silt fence. Contributing drainage s o�L I _ I CGYSI4JC'IUN � ASPHALT PAVED J area to wire reinforced silt fence shall not exceed one quarter acre per 100 feet of silt fence; and Ac r• A WASHRACX / _ / III III / / ,\ o ii) Maximum contributing drainage area to non -wire reinforced silt fence from minor swales or ditch lines ExISPNG 3. STAPLE FILTER MATERIAL 4. BACIO''1LZ AND COMPACT shall be reduced from 1 acre and no greater than 1 cfs to 0.8 acre and no greater than .08 cfs. Maximum 2X 2% PAVFMFNI-; FLOW III I III �II TO STAKES AND EXTEND THE EXCAVATED SOIL. contributing drainage area to wire reinforced silt fence from minor swales or ditch lines shall be 1 acre 12% T 2' M N ' 47 IT INTO THE TRENCH. and no greater than 1 efs; and GRAVEL FILTER 1Y 0 3. ATTACH THE FILTER FABRIC TO THE WIRE 4. BACKFILL AND COMPACT THE a , 111) The height Of any silt fence shall be a mmlmurn of 24 inches above the original ground Surface and FENCE AND EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. - RUNOFF WATER WIRE MESH y •MAST EXTEND FULL WIDTH To SEE DR - FILTERED WATER /n shall not exceed 34 inches above ground elevation; and OF IINN0�SS AND EGRESS iaA v°NG EpEVICE - I­_ `3 iv) Post spacing for non-wim-reinforced silt. fence Shall he reduced fmm a maximum 6 feet apart to a aLu maximum 5 feet apart. Post spacing for wire reinforced silt fence shall be reduced from s maximum � / - A � - __ � p. ,A p n Fcow � Vl U 10 feet apart to a maximum 8 feet apart 12' MIN. ITIVE DRAINAGE -/� - ' j� II III J - a v T Z o a z 47 b) Temporary Diversion Dike (VESCH Standard 3.09): Zy TO SEDIMENT / - IIII /fff / IIII SHEET FLOW INSTALLATION SEDIMENT 0 I RAPPING DEVICE / / / (PERSPECTIVE VIEW) ° - P. / U I) The maximum allowable drainage area to a temporary diversion dike shall be reduced flor0 five (5) i Ftow / - I I CONCRETE GUT ER LWJ m 0L acres to three (3) acres. eTER E:O H III "" y 2 CURB INLET ^ w < 3 VI J 4 Z Lu Lu SECTION A -A =III - A FLOWI B A \\\ � O F- m y c) Temporary Sediment Trap (VESCH Standard 3.13): EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. - - - / - - - SPECIFIC APPLICATION In Z Q N A nuns sion wales tap Of I aft Is initst hr al.".AnI will) a IlMlmmaii I such haBt Ock lL .. LL 0 i) Maximum total contributing drainage area shall be reduced from three (3) acres to two (2) acres; and 4naott cake supphmg a wa ll IIO.�t ulth a Lhande of 1 A nit h" lot allttllult FILTER FABRIC � _ �� THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS W tL o LOILA2111 pleE>Tae. Wads wale urn,,t he L2It1ed.1%X3A1101111he currants! t0 all WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE � W 11 The storage volume requirement shall be increased b a GSl:4fi Of 1.2. appt Ot'eLl �elllulg al ea ID te110Ve ie(lallelli All EMlallell �II:TB be pl ft'elt!(1 t10111 INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED II� _ POINTS A SHOULD HE HIGHER THAN POINT B. AREAS. In c } g y eltemM sloim L6ams, ditches of tAateicomses. WIRE DR.AINAGEWAY INSTALLATION w 0 - (FRONT ELEVATION) • GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. O' o d) Temporary Sediment Basin (VESCH Standard 3.I4): PAVED WASH RACK Source: Adapted from Installation of Straw and Fabric Filter i) A temporary sediment basin shall be provided where the total contributing drainage area exceeds two Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-2 Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-1 Source: Va. DSWC Plate 3.07-6 0, (2) acres; and C a a ii) The permanent pool and dry storage volumes shall be increased by a factor of 1.2. 1992 3,08 1992 3.18 1992 3.36 1992 3.38 � 0 SILT FENCE CULVERT INLET PIPE OUTLET CONDITIONS TYPICAL ORIENTATION OF FENCING AND ARMORING PROTECTION A A TREATMENT - 1 0 CUT/FILL QUANTITIES: ENDWAL (SOIL STABILIZATION BLANKET) 0 0 0 N d 3A Imo_ SHALLOW F ^ O\1 "o VOLUME OF CUT FOR LIMITS OF DISTURBANCE: 11,240 CU. YARD __ _V_________________ ____ d0 1I o - VOLUME OF FILL FOR LIMITS OF DISTURBANCE: 16o CU. YARD - -T ON $HALLQY SLOPES, STRIPS OF '" o 3/ PIPE OUTLET TO FIAT NETTING PROTECTIVE COVERINGS DRIP ONE I NET VOLUME OF CUT FOR LIMITS OF DISTURBANCE: 8 o8o CU. YARD TO aF FlLL- CULVERT AREA WITH NO DEFINED MAY BE APPLIED ACROSS / THE SLOPE. CHANNEL ' ' PLAN VIEW 6" OF TOPSOIL SHALL BE HAULED OFFSITE THE REMAINDER OF SURPLUS CUT WILL BE SPREAD WITHIN THE LIMITS OF DISTURBANCE IN THE - - I - SNOW FENCE I ,-■ , EXISTING SINGLE FAMILY LOTS TO HELP CREATE MORE MODERATE SLOPES. ; ; L a BERM / I I I O X HE SLOP BRING THE MATERIAL THERE IS A EOVER RM ATHE H BERM P AND OF TANCHOR R AS EXPLAINED IN EACH PHASE NARRATIVE AND REITERATED HERE, PERMANENT OR BEHIND THE BERM. AW _ _ TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS -- --J � so f` o r AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. OE of FILE SECTION A -A FILTER CLOTH KEY IN 6"-1; RECOMMENDED FOR ENTIRE PERIMETER STEEP I MIN co 0 M 3 STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE SILT FENCE BOARD FENCE Ad err s O7 0 ON ,� SLOPES, APPLY cn AT FINAL GRADE BUT WILL REMAIN DORMANT UNDISTURBED FOR LONGER THAN O DAYS. DISTANCE IS E' MINIMUM IF FLOW A PROTECTIVE COVERING PARALLEL CORD FENCE N ° (UNDISTURBED) 3 IS TOWARD FAIfiWKMEM TO THE DIRECTION OF FLOW f d AND ANCHOR SECURELY. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR FLOW A 9d0 (MIN') PLASTIC FENCE MORE THAN ONE YEAR. ** d CORRECT METHODS OF TREE FENCING OPTIONAL STONE COMBINATION 1° N PIPE OUTLET TO WELL DEFINED CHANNEL 1 BRING MATERIAL DOWN TO A LEVEL AREA BEFORE i7 I I V I 1 s• I PLAN VIEW TERMINATING THE INSTAUADON. TURN THE END1 1� UNDER V AND STAPLE AT 1f INTERVALS. y ^' (n " I La ` V J a Q z FLOW 'Y 0 X -� DITCH FLOW \ o 2.5 - d IN DITCHES, APPLY PROTECTIVE CWEFINC /.. W _ PARALLEL TO ME OIRECTON OF FLOW. SECTUj ION A -A INUSE CHECK SLOTS AS REQUIRED. AWID / Q JOINING MATERIAL ME CENTER OF / A1W FILTER CLOTH IO:4 IN 6"-B": RECOMMENDED FOR ENTIRE PERIMETER _ ME DRCH IF AT ALL POSSIBLE. „p^ // - rMr' 7 J 1 0 NOTES: 1. APRON LINING MAY BE RIPRAP. GROUTED RIPRAP. GABION - A*w i J_ J o CUSS I RIPRAP BASKET, OR CONCRETE. T1 a VDOT 13, #357 OR #5 COARSE AGGREGATE 2. L IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED PIN CORRECT TRUNK ARMORING > p TO REPLACE SILT FENCE IN " HORSESMEA " WHEN `^ � c HIGH VELOCITY OF FLOW IS EXPECTED USING PLATES THEM AND STONE _ � V J 9. BLESS THAAN�g TCH� MUM STONE DIAMETER, BUT NOT TRIANGULAR BOARD FENCE L f Source: Adapted from VDOT Standard v / Z 0 Sheets and Va. DSWC Plate 3.08-1 Source: Va. DSWC Plate 3.18-1 Source: Adapted from Ludlow Products Brochure Plate 3.36-1 Source: Va. DSWC Plate 3.38-2 U O > 0 3 J 1 U a 1992 3.01 1992 3.07 1992 3.14 Z = TEMPORARY DIVERSION DIKE Q o SAFETY FENCE SILT FENCE DROP INLET EXAMPLE PLAN VIEWS OF U PROTECTION BAFFLE LOCATIONS IN Y pC p o ,:: 2 % 4' VODO FRAME DROP INLET Compacted Soil SEDIMENT BASINS W Q o ,.. ... ® WITH GRATE E NEE ownNon ,.. MEN 1 %.l ENE 18 rain 1D 2 - NO SCALE W -O C im ����I� -Flow z o L1LIIIMil � I I INFLOW U IIII I�Ijjjjj�� IIII IIIIII \ RISER Of z o '1 U1011111Willtmilillmilli(IIII' WITH III \\ A 1 I�1 O O w 3' MIN. III III I- D/2 W > M Z_ L = TOTAL DISTANCE FROM G`1 4.5' min. LItI NORMAL POOL ` THE POINT OF INFLOW \ O Z v I I GATHER I AROUND ME BAFFLE TO /� U EXCESS ` THE RISER. T• 1 1 z v r AT CORNERS .. . NORMAL POOL PERSPECTIVE VIEWS 0/2 L) RISER \ D BAFFLE innons! Lu STAKE o PERSPECTIVE VIEW �.I FABRIC lI < j NORMAL POOL RISER PL INFLOW (D � I t' BIN. �- (0S wr p �< nlll 9 (0BAFFLE 9 b 1 -- N ELEVATION OF STAKE AND - FABRIC ORIENTATION DETAIL A 2 3 INFLOW U SPECIFIC APPLICATION 0SHEETS OF 4' X 8' X 1/f EXTERIOR 6 0 Lu W PLYWOOD OR -o EQUIVALENT THIS METHOD OF INLET PROTECTION IS APPIICA13LE WHERE THE � = o .au"rt.ac.) m,�„ ",°,°„E INLET DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER RISER CREST ELEVATION a � B L .1a THAN 5% WHERE THE INLET SHEET OR OVERLAND FLOWS NOT 5' MIN. M ) ( 10B ND. EXCEEDING 1 C.F.S.) ARE TYPICAL. THE METHOD SHALL NOT i i i 4' PERSPECTIVE VIEW PERSPECTIVE VIEW APPLY TO INLETS RECEIVING CONCENTRATED FLOWS, SUCH AS i ii ii ORS RSTS TN. OUND?E 4' SQUARE SET ATT 112066 ° PLASTIC FENCE METAL FENCE IN STREET OR HIGHWAY MEDIANS. U 3' INTO THE GROUND. o B' SCALE o AS NOTED 0 Source: Adapted from Conwed Plastics and Plate 3.01-1 Source: N.C. Erosion and Sediment Control a VDOT Road and Bridge Standards Planning and Design MarmaL 1988 Plate 3.07-1 Source: USDA-SCS Plate 3.14-6 SHEET NO. N 4 ° s H 11ROIN/A EROSION '17 SEDIMENT CON EROSION CONTROL * HANDBOOK SPECIFICA77ON NUMBER 7ROL NOTE: SLO ES GREATER THq N 3',1 SHALL AE PLANTER/I Ok WITH NAT VE STEEP SLOPE MIX WITH ANNUAL � �( TH OF�� SA SAFETY FENCE 3.01 RYEGRASS BY ERN ST CONSR VATI N EED§ A A ATESP CI LBS PER ACRE, OR B P R�1,000 Sf. UI ESS 'IO�avrv////CONSTRUCTION ENTRANCE 3.02 SPECIFIED OTHERWISE. I I O �° h0 SAF h� h h �o SCOTT R. LLINS� CD Lie. No. 035791,E CR CR CONSTRUCTION ROAD STABILIZATION 3.03 NOTE: M ASU S INTEND ID ITT� \�\ �/ / / / I I I I I I I I I \ \ \ \ / TP h \ I I / / / / / / / — SEDIME T SHALL BE CONSTRUCTEb ASAFIRST/ I III I I I I I I I/ r / I / dp0 10/19/20 �4 SF � SILT FENCE 3.05 STEP W ANY LAND r1STURBANCEACTIVITY CIPSLOP LAND C STU BANCFUNCTIONAL ES PLLACE. / J I I I I I I I I I \ / / / / / SIGNAL E� lP � STORM DRAIN INLET PROTECTION 3.07 / E r/ / I I I I I I I I I / � ��� OD �� TEMPORARY DIVERSION DIKE J. I I I I I ` / �1 S TYPE DID \ \ I I o 2 i TEMPORARY ROW DIVERSION 3.11 I I I I 24° CMP ST SEDIMENT TRAP 3.13 � / / I I I ' / I I I � \ I I / v,� ,�� \ \ CIP I I I I I I SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 / I I I I / / / / \ \ I I 0 DAM \ \ I I I I I \ \ RR RIPRAP 3.19 \ I I I I I I\ V I V \ I I f CONCRETE WASH \ \ \ \ /A O CD `_ UTILITY STREAM CROSING 3.25cr OUTAREA\ 4/�� O TS TS TEMPORARY SEEDING 3.31 I I I I \ I I \ \� \ u [a Lu v v� — ❑❑s`�. I \ / 1En PS PS PERMANENT SEEDING 3.32 \ I I I I / / / I \ I I — \ \ ,,HAA o H m EXISTING GRAVEL ROAD \ W / Z � w TO SERVE AS CONSTRUCTION WASH RAC \ \ \ ` m z J MU MU MULCHING 3.35 I I I I / \ / \ SITE ACCESS ROAD ° \ I \ \ \ / w w W� a M TREE PROTECTION 3.38 \ 00 A NO E: T IS CONSTRUC ION ENTR�NCE S ALL BE () IT INSTALLED, OPERATED, AND MAINTAINED BY THE W ODC DC DUST CONTROL 3.39 I I I I \ \ \ \ \ \ \ CE iz'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I I > I I AREA SHALL UTILIZE THIS C NSTR C ON ENTRANCE. I s SOIL TYPE \ \ \ \ '� \ I I BM SOIL STABILIZATION BLANKET 3.36Aco PROPOSED SAFETY FENCE \ V 72 \ AROUND NDSSEDIMENTTRAP \ o V I FINAL LANDSCAPE BUFFER AREA TO BE \ V A PLANTED AS SOON AS CLEARING AND SCRIM`FENCE TO E INSTALLED I I I o / GRADING OF 774E AREA IS COMPLETE co m PER PR FER io HEN CLEARING ao EXISTING SOIL TYPE BOUNDARY \ I \ CONTRACTOR STAGING AREA Q AND GRADING OF ITS LOCATION tO I I I � � � � � � � � � A I I HAS COMP ETED I I WITH FUELING TANK, DUMPSTER,o "ar ! I \ AND PORTA-POTTIES I I I I n\ \ \ \ ° I NOTE: POST SPACING SHALL BE A I I I I I \ SF ` [WIRE MAXIMUM OF 8 FEET. HEIGHT I I \ SUPPORT SHALL BE AT LEAST 24INCHE5 I I I I I j w C) CD BUT NO GREATER THAN 34 tip I \ o VID INCHES. o I I OT D BARRICADE � \ \ i -692 — \ I \ l / 00 L9I / 1 SCRIM ENCETO BE INSTALLED IPER PR FFER 3.WHEN CLEARING gg AND GR DING'OF ITS LOCATION HA� M LETED I I I I DID 0 n I / O m PROPOSED SAFETY FENCE ( /6°6 00� ry o qo w 69° y8� y6' 6 p 66ti 6 / / I I e I I D AROUND SEDIMENT TRAP I \ / ° o° t�°i SAF /� � \ `An o 9s 96 1 \ 68 rn TP / 6 °c, ��� e� / m I I °, m / / / / / J / N \ I �� 1 sg �� I 1 I I V I iO � \ S 1 4 0 '03" 3�'10' / /It "t Z � Q \ + + r + rrr r rr r rr r- + \ + + + + + P 5 + + +-- 'z- p 1 I I ♦ I I I DD —� m S TYPE w N J \ I A \ 1 I A A \ I I BM I bA TO S� z 0.7� A� z N i I I I I ,� \ I I I I I I I I �' Q z v�v i T� Ii I vI I� \ \ \ I MU ' \ ' / -� I I U S 1 \ I-�-- - I -I --I - -- L J z 1 \ DATOSTz=i.g6AC C I \ 3\ ' � \ \ V A I 1 + \ V A TMP 90-31 DD A \l '/, > I TS I I ) V A I I \ 5.262 AC \ \ \ \ I 1 I \ \ I I \ 229,211 SF\ \ W Z m �y \ � Z 11, Dc 1 � � W \ C \ \ C \ \ TS I , \ \ \ \ \ \ \ \ \ \ CONCRETE WASH 1 Q G \ \ I I 1 LRS io'WIDE \ OUTAREA 1 w J \ \I DC \ I I I \ \ TOP OF DAM \ \ \ \ \ \ 1 I-4 0 \ \ I I - — — A \ / \ \� A Q w DA T I I OSF- \ \ o. AC ♦ 1 \ \ \ _ I I - 1 — dS t - SOIL T � � \ i \ TYPE � � TS � � \ \ \ \ \ � � EXISTING GRAVEL ROAD ce I I \ lg I BM - \ 1 I \ 7 \ � I I II FLOW DIRECTION � � � � \ \ � � \ , TO SERVE AS CONSTRUCTION Z I I I I ARROW (TYP.) F I I I S )H H b Q \ I \ SITE ACCESS ROAD \ O \ NOTE: POST PACING SHALL BE DRAINAGE DIVIDE (TYP.) I SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I I I I I I SUPPORT \ I � z l SHALL BE AT LEAST z4 INCHES O FLOW DIRECTION WD x BUT NO GREATER THAN 34 , � ARROW (TYP.) x IGRAVEL CONSTRUCTION I I I INCHES. / \ \ O I \ w/WIRE // \ SF SUPPORT I I I 1 I I SITE ACCESS ROAD I / / I I \ / \ \ S ILTYPE\ \ \ W > W EXISTING W Q NOTE: POST SPACING SHALL BE A I — \ TYPE BOUNDARY I \ MAXIMUM OF 8 FEET. HEIGHT � � / x � I I I / / � / / W I SHALL BE AT LEAST 24INCHE5 1 }� ( I Ln I BUT NO GREATER THAN 34 \ 1 / I - - I % % . % % ' %(1✓>- ' XISTING SOIL TYPE BOUNDARY \ \ Q I INCHES. W I \ A 1 / PROPOSEDTEMPO RARY / I I - / / I I �� \� � LLI ^�^ STOCKPILE SURROUNDE I I I I I \ I I � o I BY SILT FENCE I � '�II� I I I I SF wIWI I r r I rrr r r r r r r r r \ I I I \ SUPP /I, I - 11 5 '1 0 'W 07 .99'(T)0 (5 1 \ I w04 86 ° b N o 0 6 * ry o ou �0 N ° c0 �D I- ry o m � ry o 00 cb co a a ry o ao w o 69 `b 00 co n kD � � `o `° ^ m m m m m ry ry ry H \ \ to �D LD / LD �o ko ID W kD W t0 w to <o �1D 1 to tD I I \I 1 \ \ \ \ \ SAF / / / / / / / / I I I PROPOSEDLIMITSI I I I NOTE: DRIVEWAY A CtSS TO / OF DISTURBANCE (TYPJ NOTE CO TRACTOR TO ENSURE / DID POSTIVE DRAINAGE ALONG / AVON ST EXT SHALL BE I \ \ AT ALL TIMES FOR DIVERSION DIKE / r CURRENT REDS DENT OF EX ST NG SINGLE FAMILY HOME. DURING / / / / / / 0 _ NOTE: SILT FENCE, SAFETY FENCE, AND / o TREE PROTECTION SHALL BE INSTALLED CONSTRUCTION CONTRACTOR I I / AT LIMITS OF DISTURBANCE. THESE ARE / J I I I I I SHALL PROVIDE ALTERNATE / G�APHlc S ALE / / / JOB NO. FFSET FOR GRAPHICAL PURPOSES. 30 0 /is ao eo izo TEMPORARY ACCESS FOR / 112066 I RAINAGEDIVIDESAREMEASUREDATTHE J I II I I I I I II I III IRESIDENTASNE DED I / SCALED�1 LIMIT 1S OF DISTURBANCE OR DIVERSION 10DIKE(IN FEE 1 Ich ft. SHEET NO. 5 EROSION CONTROL 'I' 11RGINIA EROSION , SEDIMENT CONTROL HANDBOOK SPECIFICA77ON NUMBER I I I V SA SAFETY FENCE 3.01 I I I u I I / lb oCE CONSTRUCTION ENTRANCE 3.02 \ I ) I l I I I I SD 0 <° SAF I \ \ I I I I STR-z & STR-i -/ �� h �n Tp h° / \ / / O SCOTT R. LLINS�X CR CR CONSTRUCTION ROAD STABILIZATION 3.03 I \ / / / I I I I I I I 1 1 1 EPHA E \ / \ I I / / / / / / I \ I CD Lie. No. 035791 /— SF � SILT FENCE 3.05 / �10/19/20 OAS �1 I' / / I , I I SIGNAL Eta lP STORM GRAIN INLET PROTECTION 3.07 / I I\ I I, D OD �� TEMPORARY DIVERSION DIKE 3.09 / I I I I \ \ O TEMPORARY ROW DIVERSION 3.11 I / 24" CMP 1 I I I I I I I \ ST SEDIMENT TRAP 3.13 / I I I I' I I I 1 I I I % ', v�, ti� \ CIP I I SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 I I I / / / / \ \ 1 \ ` _ I I 0 DAM \ I I I I \Ln RR RIPRAP 3.19 I I I I I \ A A I \ I I f CONCRETE WASH I \ S CD �_ UTILITY STREAM CROSING 3.25 i I I V OUTAREA a o TS TS TEMPORARY SEEDING 3.31 \ , I \ — _ \ \ v m w IILn E \ \� ❑❑ \ \ o Q / 1 PS PS PERMANENT SEEDING 3.32 \ I I I I / / J I 1 I I EXISTING GRAVEL ROAD C I \ \ \ \ H o < m \ TO SERVE AS CONSTRUCTION WASH RAC \ \ \ m z J MU MU MULCHING 3.35 SITE ACCESS ROAD \� \ 1 \ \ \ \ w '" w TREE PROTECTION 3.38 \ a \ \ A A \ \ NO E: T IS CONSTRUC ION ENTRANCES ALL BE Lu � INSTALLED, OPERATED, AND MAINTAINED BY THE W DC DC DUST CONTROL 3.39 I I I I \ \ \ \ \ \ \ DD CE iz'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I I > O \ I I I \ \ \ \ \ gLu REA SHALL UTILIZE THIS C NS1TR C ON ENTRANCE. I \ s BM SOIL STABILIZATION BLANKET 3.36 I LANDSCAPEFINAL BUFFER S PLANTED AS SOON AS CLEARING AND \ O \ \ PROPOSED SAFETY FENCE \ o AROUNDSEDIMENTTRAP GRADING OF 774E AREA IS COMPLETE LOCATI N OF SC IM FENCE 00 00 / o Q 00 I \ \ \ \ A gel c� G v INSTALLED PER P OFFER zo IN I I11,\I I \ \\ \ CONTRACTOR STAGING AREA a 1 WITH FUELING TANK, DUMPSTER,, O".\ I \ al ^ I 1 I I N o 0 0 o AND PORTA-POTTIES rn 00 I \ \ \ I NOTE: POST SPACING SHALL BE A I I w/WIRE MAXIMUM OF 8 FEET. HEIGHT i \ \ SUPPORT SHALL BEAT LEAST 24INCHES I j o 0 I L \ \ BUT NO GREATER THAN 34 tip 111 \ I I o _ o N I I VD OT D BARRICADE INCHES. � \ \ i \ -69� I \ \ I \ \ I / 00 o I I I \ \ \ I�I ° \ vv \ _ \ I/ \00 Lu / \ / \ iLOCA ON OF SC M / / \ I \ 94 1 'FENCE[ STALL D PER I 1 PROFFE io INPHASEI J \ O I I I 1 I I \ 7 yob o� N M I 6gb I CRS 6)8 DD �0 ��� 69°� y8� 6y- yy� 6yv / i o I I ° I I ( PERMANENT STR-3A TO STR & STR-i O°o �h�� SAF y O �, 9 96 \ TP o FOOT LONG AN 00 I I I \ N \ 1ID `Av o D �k 1 68z / 6 FOOT HIGH BAFFLES a \ I \ I \ \ \ \ TO STR-OUT ARE TO BE BUILT \ S I 1 I 684 \ I 31 °0 '03" 3� 0' \ \ \ S FIRST ST P RT OF THIS PHASE r / / co c + ° I I I ++.++ VB p I Cn J A�OST?=e.7 Act De \ / m --- N O / 00 v I -' I ��I II \ 00 N \ \ DRAINAGE DIVIDE (TYP.) \ I U I I I \ I I I 1 1 r r r r > < Z DA15�C \ 1 \ \ a DATo5B3.=I2.75�C I cRs —�-- rrrr �� /, % W J O I� y TMP 90-31 DP� NEC �I DC �_ 5.262 AC \ , I 9 9 6' 11 IDE OP OF D I I (n Z Y� \ 229,211 SF \ \\ \� \ 1 W W \NO E: POST SPACING SHALL BE A\ \\ CONCRETE WASH 1 Q > — U 1 \ \ CRS SF SUPPORT MAXIMUM OF 8 FEET. HEIGHT \ \� J OUTAREA I U \ 1 1 \ I I I I I \ \ \ \ SHALL BUT NO GREATER THAN 34 INCHES % \ \\ \ 1 Q W �I I I \ \ \ \ I MU I I I I _ y V P\ \ \ V \INCHES. FLOW DIRECT[ N \ W ROPOSED SAFETY FENCE ARROW(TAROUND SEDIMENT BASIN \EXISTING GRAVELROAD Z \ \ 0 1 I I I IH H b 4o FOOT LONG AND SIITO TE ACCESS ADSERVE ASTRUCTION W Q O I I I 1 I I Ts ' \\ / I I I F I I WD 6 FOOT HIGH 'APPLES Vl U, z O \ / DC[GRAVEL CONSTRUCTION I I 1 1 ` \ \ \ \ O w I \ 1 w/WIRE I /� I I I ' I I I SITE ACCESS ROAD I 1 \ \ \ \ ~ \\ SF SUPPORTLu \ W / i SHALL BE A NOTE: POST SPACING SHA — MAXIMUM OF 8 FEET. HEIGHT SHALL BE AT LEAST 241NCHE5 BUT NO GREATER THAN 34 Vl 1 INCHES. A \ xl W 1�1- o W Q a J PROPOSED TEMPORARY f / I I I ` I I N o CS 1 \ got STOCKPILE SURROUNDE wIWIFENCE �irrrrrr�� 1 fi` , BYSILT 'F k + ��� aa Irywi! mmr r l r r/ r r r r r r ' I 1 II I I \ \ / I I I I I \ \ I \ 1 \ SF SUPPI V O I a �66 0 / 04 O \ I w BD., p 0 a N O 0 y �t N O 00 t0 �' N O co lD .t N O 0D l0 .t N O 00 cb (o a a ry O W �D 0 ' 69 � Cb 00 00 I� ^ lD l0 tD l0 lD V1 V1 M M M M M N ry N \ I \ \ 10 ko lD / lD �0 ko ID kD lD ko �D �0 %0 %0 ADD I1SAF / / / / / / / / \ I I I PROPOSE I I I I NOTE: DRIVEWAY ACCESS TO / OF DISTURBANCE (TYPJ NOtE CO TRACTOR TO ENSURE / DD AVON ST EXT SHALL BE POSTIVE DRAINAGE ALONG \ \ / DIVERSION DIKE MAINTAINED AT ALL TIMES FOR NOTE: SILT FENCE, SAFETY FENCE, AND SINGLE FAMILY CURRENT RESIDENT OF EXISHOME. DURING TING /TREE PROTECTION SHALL BE INSTALLED / I I I I I ' CONSTRUCTCO NTRACTOR NTR CTOR / / / / / ' / AT LIMITS OF DISTURBANCE. THESE ARE / I I I I I SHALL PROVIDE ALTERNATE / G AP41C S ALE/ / / cos No. OFFSET FOR GRAPHICAL PURPOSES. / \ / I I TEMPORARY ACCESS FOR / 112066 30 0 I 30 60 20 DRAINAGE DIVIDES ARE MEASURED ATTHE\ \ I I I RESIDENT AS NE DED \ / LE LIMITS OF DISTURBANCE OR DIVERSION \ I = 30 I \ \ \ DIKE. V I ( IN FEE ) SHEET NO. 1�ch = ft. 6 EROSION CONTROL '1' 11RGINIA EROSION , SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER I I I V SA SAFETY FENCE 3.01cb CE CONSTRUCTION ENTRANCE 3.02 J I ) I l I I I O o°° / c� SAF °G m7�TPppLINS��h h h° / / / / O SCOTT R. L CR CR CONSTRUCTION ROAD STABILIZATION 3.03 I \ / / / I I I I I I I \ \ \ \ / J = I \ I CD Lie. No. 035791 � � SILT FENCE J. I I I I / r / / / o I I o / / / `6 10/19/20 �4 SF �\ / � I ' / i � I I I I I I I I I I 1 OIONAL E��l� lP STORM DRAIN INLET PROTECTION 3.07 / I I/ I I I I I \ \ I I I I I \ / N / / OD �� TEMPORARY DIVERSION DIKE J. n / I I I I —► / r o , o I, I � � I I � TEMPORARY ROW DIVERSION 3.11 / _� I � � / � I I , � I I � � � I I I I WD / � 24" CMP ST SEDIMENT TRAP J. ® SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18Ln I RR RIPRAP 3.19 \ I I I I I I I \ \ \ \ I \ \\ F D f \\ I I I \ f CONCRETE WASH o \ \ \ I IA O CD �� UTILITY STREAM CROSING 3.25 / i I I OUTAREA 4/� z O TS TS TEMPORARY SEEDING 3.31 \ , I I V I _ \ \ v in w PS PS PERMANENT SEEDING 3.32 I I I / I V I I E�� XISTING GRAVEL ROAD I. H O .. H Z m w TO SERVE AS CONSTRUCTION L WASH RAC \ \ m z a MU MU MULCHING 3.35 \ \ I III I I \ / SITE ACCESS ROAD w '" w TREE PROTEC770N J. I I \ �� \ \ NO E: T IS CONSTRUC IO� ENTR�NCE S ALL BE I I ui n p W INSTALLED, OPERATED, AND MAINTAINED BY THE Lu DC OC DUST CONTROL 3.39 \ I I I I \ \ \ \ \ \\ \ \ \ \ \ \ CE iz'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I I I \ > ( l 1 W BM SOIL STABILIZATION BLANKET 3.36 I IFINAL \\REA SHALL UTILIZE THIS\SCR\ ONENTRA\E. s AF LANDSCAPE BUFFER AREA TO BE I I I I \ �� 1 \ PROPOSED SAFETY FENCE I PLANTED AS SOON AS CLEARING AND I I / I o \ \ AROUND SEDIMENT TRAP LOCATION OF SCRIM FENCE I ° 1 1 GRADING OF THE AREA IS COMPLETE 00 m \ / o W ,n INSTALED PER PROFFER zo IN 00O I \ I w gel m� G I I I I CONTRACTOR STAGING AREA Q\\ �I WITH FUELING TANK, DUMPSTER" ar ^ N o 0 0 o AND PORTA-POTTIES 00 \ \ \ I� NOTE: POST SPACING SHALL BE A I I I I I \ SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I i SUPPORT SHALL BE AT LEAST 24INCHES 0 I L I \ \ BUT NO GREATER THAN 34 _ \ o �� I I VD OT D BARRICADE \ _ \ INCHES. o N 69.2 \00 iLOCA ONO C M I \ \ \ 94' 1 FENCEI STALL��PER I \ I I \ I PROFFE io FN PHASE] I I PROPOSED TEMPORARY 15" CMP I I I \ WD CONNECTION BETWEEN PERMANENT STR-5AAND STR-4. LENGTH=33.8', / 0 06 N CM I \ \ I \ INVERT IN=665.So, INVERT OUT=664 49 0� i / o I I o I ( 6 ° °° lb SAF M \ \ G m 69G \ \ SLOPE=3.00�i6 ,69 i 6g 66 66k 66y i ni I o I I I I I \ / �� DD h� /h Q m 6 y TP 3o FOOT LONG AND m O 6 N \ ° �� 96 \ 1 \ 6, / 6 FOOT HIGH BAFFLES I I \ I 6 ID I \ S I 1 1 84 \ I 1 \ 31 ch S +++++++ + + I ++++MU ++ I++++++++ �� v .. PS +I + + + 1+ + I — I 7 I �A TO'IST � _ .71 AC � � De / � ' �, � N � I IP A I I I B I I --- N O \ / \ _ IP I \ T I I I ' I , \ I I I I WD / -' I Q Z D TOISB i - z. I AC \ DA TO SF � 10 I \ _ � _ Q z uo TS TS 1 I I I �� � j \ 15 �c \ I 1 \ \ / / MU I I 7�5 I I (.RGJ 619 79 i O ` -i J i \ \ V A I MU I DC I I 3° \ V A TA P 90-31 dP A A '/, > \ I 39.79 5.262 AC DC \ A � /, � I � U) Z Bi\ \ I \ \\ o 0 1\ 1 W W I IP 5 .7I \\ \ �� ~ \ 1 IP IP I I I I \ \� \ \NOUTE: POST SP \ING SHALL B \ \ I CONCRETEWASH 1 Q \ \ \ I 1 \ I I �S SF w/WI�E MAXIMUM OF 8 FEET. HEIGHT \ OUT AREA 1 J Q \ 1 - C - \ SUS PORT SHALL BEAT LEAST z4 INCHES \ 1 W WIPE ToF o�M BUT NO GREATER INCHES. THAN 34 \ 1 lJl AROUND SAFETY FENCE V �A \� 1 BM I I N ' \ EXISTING GRAVEL ROAD LL PROPOSEDSEDIMENT BAST \ \ TO SERVER CONSTRUCTION 1 DC FLOW DI TtON- 4 I \ \ \ \ SITE ACCESS ROAD \ ui � H H I< oFOOTLON GAND Q O I I \ IPJ ARROW ( 6 FOOT HIGH BAFFLES \ \ 86 o x �""UM� I v v z O \ I I x GRAVEL CONSTRUCTION I I I I \ / \ \ \ \ \ \ w O w IP TS I I I TS I I I SITE ACCESS ROAD \ \ \ I 1\ MU MU - \ T I MU I I I / / / / I I U) I Lu I In w J — V I \ Q \ PROPOSEDTEMPORARY / I � �N o ° ° o LLJ STOCKPILE SURROUNDE I I I I I I I I I w iO I BY SILT FENCE I I \ WIW m I ��/ �m ��� ' SU PI lc I IIRMP I Iryyyyyy 5 0 W 07 .99'(T) V ��� I I N \ I 00 00 �G W b N O 6 N O 00 t0 -' N O 00 l0 N O W b It N O 00 cb (0 S .t ry O 00 �0 �0 \ �0 \ \ 690 � W 1� ^ l0 l0 t0 l0 l0 V1 M M M �o �o w �Io ko I� ko w ko �O �O �o b to I I 1 \ S� w/WIRE RAINAGE DIVIDE (TYP.) SAF — _ OF DISTURBANCE I I I I I NOTE: CONTRACTOR 4O ENSURE NOTE:NSTEDRIVEWAY ACCESS T / PROPOSED AVON ST EXT SHALL BE / I / BANCE (TYP.) I _ / /I POSTI DRAINAGE ALONG MAINTAINED AT ALL TIMES FOR I NOTE: POST SPACING SHALL BE A \ I I DIKE EXISTING SINGLE FAMILY HOME. I \ SUPPORT I DD DIVERSION I DURING CONSTRUCTION OF / w F- W I MAXIMUM OF 8 FEET. HEIGHT / // / / NOTE. SILT FENCE, SAFETY FENCE, AND I I ASPHALT DRIVEWAY, TREE PROTECTION SHALL BE INSTALLED CONTRACTOR SHALL PROVIDE JOB I SHALL BE AT LEAST 24INCHES AT LIMITS OF DISTURBANCE. THESE ARE J I I I I I ALTERNATE TEMPORARY ACCESS G�AP41C S ALE/ / / 12 No. BUT NO GREATER THAN 34 / I I INCHES. OFFSET�'` _ _ — — o / DRANAGEODIVDESARELMEASUOREDATTHE I I FOR RESIDENT 30 / 0 /is 30 60 / / 120 1��� SCALE I /LIMITS OF DISTURBANCE OR DIVERSION � I I I I I DIKE. / I I I I I / / i - 3 ( IN FEE ) SHEET NO.O. 1 /nch = ft. SH / 7 EROSION CONTROL 'l' 11RGINIA EROSION , SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER I I I V SA SAFETY FENCE 3.01 I I I u I I I / CE CONSTRUCTION ENTRANCE 3.02 J I ) I I I I I O o°° �°� °O m � m o O /SCOTT R. LLINS O CR I I \ \ / / / I I I I �" / y ,- o-�/ \ I I I I I I \ / DD / SAF TP / / / _ C�Lic. No. 035791 CONSTRUCTION ROAD STABILIZATION 3.03 \ r / 10/19/20 �4 SF �� SILT FENCE 3.05 / / � II I I I I I I I �0��,S lP STORM DRAIN INLET PROTECTION 3.07 \ I ' / I I I I I I I I I SIONAL E J � O� I I I I 1 OD �� 1011 TEMPORARY DIVERSION DIKE 3.09 � I I� � I I I I � � —► � �1 _ - - _ Op \ \ I I I TEMPORARY ROW DIVERSION 3.11 I I I I I I I V I I / inl 24" CMP I I I I I I I I \ ST O SEDIMENT TRAP J. � // III I 1 / I I I � \ I I O '♦ � �` � � \ \ � I I I � SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 / I I I I / / / / \ \ \ I \ 0 DAM I I I I \ r DD \ I z RR RIPRAP 3.19 V I I I I I I I \ A \ I \\\ I I A � f CONCRETE WASH O x \ I V A u CD �_ UTILITY STREAM CROSING 3.25 i I I OUTAREA I O O z o a � o TS TS TEMPORARY SEEDING 3.31 \ , I I V I \ I \ �_ \ \ \ \ v in w / HH PS PS En im� PERMANENT SEEDING 3.32 I III / / l I \ I I \\� I �� Y° o < m \ Z w \ WASH RAC \ \ m z a MU MU MULCHING 3.35 T I \ A V� \ 00 A NO E: T IS CONSTRUC ION ENTRANCE 5 ALL BE I I W n O TREE PROTECTION 3.38 \ o I I I I I \ EXISTING GRAVEL ROAD \ \ INSTALLED, OPERATED, AND MAINTAINED BY THE Lu DC DC DUST CONTROL J. I CE iz'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I \ I w \ I I \ \ TO SERVE AS CONSTRUCTION BM Ilk SOIL STABILIZATION BLANKET 3.36 I I \ \ \ \ \ \ \ SITE ACCESS ROAD \ \ \ \ \ \ AREA STALL UTILIZE THIS C NSTR \ ON ENTRA \ E. I I s PROPOSED SAFETY F FINAL LANDSCAPE BUFFER AREA TO BE \ I I \ I I ` \ \ \ \ AROUND SEDIMETTRAl PLANTED AS SOON AS CLEARING AND I I o \ OO \ a N GRADING OF THE AREA IS COMPLETE LOCATION OF SCR IM FENCE CO 00\ I \ \ \ \ \ I \ \ 1 \ w �/ 0 CID q� G+ `^ \ INSTALLED PER PROFFER zo IN O I \ CONTRACTOR STAGING AREA 0 I \ \ \ I I I I \ WITH FUELING TANK, DUMPSTEl O". lk ^ I \ I N o 0 0 o AND PORTA-POTTIESLID o I I rn \ \ \ I NOTE: POST SPACING SHALL BE A I I I I \ w/WIRE MAXIMUM OF 8 FEET. HEIGHT SUPPORT SHALL BE AT LEAST 24INCHES I II I j o CD \ \ BUT NO GREATER THAN 34 tp \ rn VDOD\ BARRICADE INCHES. ao N ', -69.2 I \ \ \ I / o o I I 00 I LOCA ON OF SC M L9 I I 94' 1 FENCEI STALL PER PROFFE io IN PHASE III 1 I I v� FWD I II l /, I I z� 1 / a I a I O o6 N M 6)g e g W0 610/ 6gi 66 /6 ��° °o d, N \a G TP 6 ,66 o FOOT LONG AND m 1 N \ \ `An 'D °D 9k 96 \ 1 6 \68a I / 6 FOOT HIGH BAFFLES a I I I \ I / J DD SA z 1 8 \ \ / r_ Q 1 \ 1 r S --- 4 31°0 '03" 3\0' \ � � / / / co + + + r r r rr r m + S +' + + + + + + + + + + + + — X—X— is I N + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + r , + + + I+ + I I I qA TO ST _ .o� C I Db y \ 1 \ I P I P I A \ I I I �� V I I I I i Q 1 T 1 / z u - \ DA T� SF 1 O - Ts v I \ I I I 1 I \\ ♦ v>LLI Q Z 15 �C 1 I D TOISB 1 - z.7 AC TS \ 1 \ MU I I I I Gg5 3°� .T9 ��� \ I I I I A 1V A \ \ u TMP 90-31 \ \ 1 \1 DC I I u ► I \ e. e \ I \ 1 � 5.262 AC \\\ \ /� I f> 229 F' \ DID z I / I \ \ Bl\ \ �6' W1�DE TOP OF pAM X 1 �'\ \ / w w \ \ .711 'A- 6�_�_ > 1 I \ CONCRETE WASH Q \ \ \ I 1\ I IP I w/WIRE \ O \ I I OUT AREA 1 J 1 0 1 L \ \ SUPPORT v A \Lu \ NOTE: POST SPACING SHALL BE A \ \ \ 1 �� \ \ MAXIMUM OF FEET. HEIGHT SHALL BE �c \ I AT LEAST 24 INCHES BUT NO GREATER \ ■I ~� THAN 34 INCHES. ' I A \� \ lJ /) 06 AROUND SEDIMENT BASIN 1k \\� ce 7 1 \ ' 1 I I BM \ \ ♦ f � 0 1 i r X 3�1 4o FOOT LONG AND I �� `x V Lu Q 0 1 DC I IP 6 FOOT HIGH BAFFLES H Ln GRAVEL CONSTRUCTION � \ \ F SITE ACCESS ROAD I I I I \\ �� I EXISTING GRAVEL ROAD \ C% z O IP I I I I WD I _ _� _� r 1 , / i on y, �. 1 / TO SERVE AS CONSTRUCTION O TS I I ., I r r r I \ / \ SITE ACCESS ROAD \ w \ w w / v _ � I v I DA � MU I x / / /TO 51�=F- \ w MU A I I �` ' F- I 1 — f LLJ +r \ ♦ ♦ -- / I I I STOCKPILE SURBY SR TOFENCE I ♦III I I �k--- I MU / 5t — \ I I I I O \ I w/WI J < I I I NOTE: DRIVEWAY ACCESS TO 5 °1 W 107 .99'(T) AVON ST EXT SHALL BE II I MAINTAINED AT ALL TIMES FOR 1 I O \ \ d6 o b 0 a ry o 0 6 ti o au a N ° 00 LD a ry o w � v N o m EXISTING SINGLE FAMILY HOME. y a a a N o ao w i0 \ 69 � 4D 00 W ^ 0 0 0 0 0 V V M N N N ' o D w / kD LD a ko LD w DURING CONSTRUCTION OF o D D D w/WIRE \ — I I I I ASPHALT DRIVEWAY, RAINAGE DIVIDE (TYP.) _ / NO E: CO TRACTOR O ENSURE CONTRACTOR SHALL PROVIDE I \ 11 \ \ SAF OF DISPROPOTURBANCE (TYP.) I DID ALTERNATE TEMPORARY ACCESS / I \ \SUPPORT \ _ _ — I I I POSTIVE DRAINAGE DIVERS ON DIKE LONG FOR RESIDENT F I NOTE. POST SPACING SHALL BE A NOTE: SILT FENCE, SAFETY FENCE, AND J / / / / / / O w I I MAXIMUM OF 8 FEET. HEIGHT / a =m I I \ TREE PROTECTION SHALL BE INSTALLED SHALL BE AT LEAST 241NCHE5 /AT LIMITS OF DISTURBANCE. THESE ARE I I ' /G AP41C S ALE/ / / cos No. BUT NO GREATER THAN 34 OFFSETFOR GRAPHICAL PURPOSES. ao o /is ao so �zo 112066 INCHES. DESARE MEASUREDATTHE SCALE LIMITS OF DISTURBANCE OR DIVERSION I I I I „ _ � � I 1 = 30' I I I) \ DIKE. IN FEE ) SHEET NO. / I I I I I I I I 1� ch 0 ft. 8 9 EROSION CONTROL HANDBOOK SPECIFICA77ON NUMBER* WITH NAT VE STEEP SLOPE MIX ITH ANNE ILANITEDJI / / / I I I / I I I / / / * VIRGINIA EROSION & SEDIMENT CONTROL w/WIRE / SF SUPPORT - I I / / / TH QF� NOTE: SLO ES GREATER TH N 3 1 HALL B� SA SAFETY FENCE 3.01 RYEGRASS BY ERNST CONSgRVAfI N SEEDS AT RAVE CE CONSTRUCTION ENTRANCE 3.02 OF 60 LBS. PER ACRE, OR 1 �B P�R1,Ob0 SF, UN J I / / I I I I / I I I 1 I I I I SPECIFIED OTHERWISE. / \ /�Oo A),k 0 °c6SCOTT R. LLINS�CONSTRUCTION ROAD STABILIZATION 3.03SAF I TP L� Lic. No. 035791 J RIP RAP CHANNEL / / / / `6 O/ ; / / SEE CALCULATIONS PACKET / / 10/19/20 SF SILT FENCE 3.05 i t 1 �SSIONAL �ZyG lP STORM DRAIN INLET PROTECTION 3.07 \ / I I I I I I I I I I I / I I / ul �@ DD �� TEMPORARY DIVERSION DIKE 3.09 TEMPORARY ROW DIVERSION 3.11 3,> 24" CMP � �, ,----� I � \ ST SEDIMENT TRAP 3.13 4y SB SEDIMENT BASIN 3.14 Lp 8 1 I CIS I I \ \ N I OP OUTLET PROTECT7ON J. / I I I / / / \ I x I \ \ I Ln 1 O I I v v v Iv v z W RR RIPRAP 3.19 \ \ I I I I I I I I I \ ` \ \ x \ \ / \ \\ \ \ \ I\ I O \ CONCRETE WA H u CO C S � z \ UTILITY STREAM CROSING 3.25 i I OUT AREA O a �o TS TS TEMPORARY SEEDING 3.31 \ , I I V I \ \ �- X \ \ \ \ v m w o --o- L r CSC- w cn PS PS PERMANENT SEEDING 3.32 I I I I I I \ \ X ❑❑ \ z Q w V� WASH RAC \ m z a MU MU MULCHING 3.35 O TREE PR07EC770N 3.38 \ I I a I / \ \ \ \ ��\ \ \ \ NO E: T IS CONSRUC ION ENTRANCE 5 ALC BE I I W \ Lu Lu INSTALLED, OPERATED, AND MAINTAINED BY THE ODC DC DUST CONTROL 3.39 I I I I I I \ \ \ \ \ \ \ \ \ \ CE iz'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I I I > \ I I \ \ \ \ \ AREA SHALL UTILIZE THIS C NNST R C ON ENTRANCE. I s BM SOIL STABILIZA77ON BLANKET 3.36 0OFINAL LANDSCAPE BUFFER AREA TO \ \ \ \ 1 I O 0 III GRADINGPLANTED OF SOON AS THE AREA CLEARING AND E \ I I I I I \ \ \ \ \ 1 \ \ o \ o- \ / \ I I n 1 V' 47N 00 �' LOCATIQN OF SC IM FENCE I I 00 INSTALLED PER P OFFER zo IN \ I I \ \ \` CONTRACTOR STAGING AREA 1 \ I I / \ WITH FUELING TANK, DUMPSTER 0r ^ I I N o 0 0 o AND PORTA-POTTIES I I I I I �I \ \\ \ �11� � \ a / VDOT D BARRICADE m NO E: OST SPACING -SHALL BE A 000 I \ SF W/WIRE MAXIMUM OF 8 FEET. HEIGHT - / I u I I / SUPPORT SHALL BEAT LEAST z4INCHES I ILOCA ON OF SCRAM / 94' ` i FENCE I STALLED PER I I 1 I I \ BUT NO GREATER THAN 3y I PROFFE 10 IN"PHASE I I I I INCHE F- PROPOSED LIMITS OF \ DISTURBANCE = 4.25 ACRES I I 1 I I , a N I o 606 Goy \ ry M \ \ 69E o �o - \ 6)8 b� e� ° 69°� 68� 6� v i o I I I °v O iD cP 9 y6 N `Av �k \\ 8z h I I I o m I SAF ry �6 60 G0 h� ry m ° �ID � ° / / / A SAF Z on S ° 684 6 �6 6 0 0 31 °0 '03" 3� 0, / / r / / Ch Q 4 0 8 7 ' � TW 690 694- '6 e -- \ \ 692 W688 "W 86 ry 68z I Xr 1 CV J 690 m 68o I I I A / W O \ I - \ 60 IP Yw69 IP IP P I I I I I I I I / m-- N 00 I-- 80� Gg0 rvLd 6 I a �� �- 66 - rm TMP 90-31 oo x 10 I ` 5.262 AC I I- -� -I 6 ° \ I I 2292 1 SF\o \ 6'° W w o 0 4°/60� m ` m m �'�nl 664 \J 00 X \ I 604 CONCRETE WASH X Q I 0 I 4h � d \ 6o6 �o x I —I 1 ( w/WIRE \ \ \ \ Q 1—I I I x \ I I IP I I IP I I e I \ SF (SUPPORT \ \\ 6o8 \ \\ \ xr C) Z I I \ \ I I I I I I \ NOTE: P ST SPACING SF ALL BE A\ \ \------ ❑ W Y ce Q I MAXIMUM OF 8 FEET. HEIGHT \ 7 I I \ 610 �� � ------ X—X— X x < Z ,.. _ a \ SHALL BE AT LEAST z41NCHEs \ � �- W 4 IP IP IP BUT NO GREATER THAN 34 \ = 6 I I o INCHES* biz \ ,� k �� P ��� �� I �AF I 6�4 I ,F y �o I I �X x 616 A \ �u j W W m \ °r6 3 I � - 6g4 I o m N r �`' ° — N N afJ \ M (� � w I �O M iD r \ IP /) I l0 b O r" tD 1 (J N � � � 1 � , I � � I I 7% _ 686 \ I o� I� ° I ( X ��n-� j 0 0 0 0 �JJ Q I ° I LL Q IP 688 IP 6g4 68o IP IP I I � - I O 5 °1 0 W 07 .99' T I 6 O 00 6d'� 666 9O00 p/ 0 / a I o 0 6 ro o w % N o m � ry o Co NOTE: DRIVEWAY ACCESS TO a a ry o ao - N \ I 0 \ TP 69 �b m m n k 0 m m m ry ry ry N co 00 ,° / ,0 AVON ST EXT SHALL BE ,° r b 1 / SAF / / T I I I I MAINTAINED AT ALL TIMES FOR r PROPOSED LIMITS I EXISTING SINGLE FAMILY HOME. I I w/WIRE I I \ \ OF DISTURBANCE (TYP.) DURING CONSTRUCTION OF SF SUPPORT ASPHALT DRIVEWAY, / NOTE: POS S ACING SHALL BE A / / / / / / CONTRACTOR SHALL PROVIDE ° w / / E MAXIMUM OF 8 FEET. HEIGHT / / / / / / NOTE: SILT FENCE, SAFETY FENCE, AND ALTERNATE TEMPORARY ACCESS SHALL BE AT LEAST 24 INCHES TREE PROTECTION SHALL BE INSTALLED FOR RESIDENT BUT NO GREATER THAN 34 I \ \ 1 J I I I I I G AP41C S ALE/ cos No. i AT LIMITS OF DISTURBANCE. THESE ARE I I CHES. FFSET FOR GRAPHICAL PURPOSES. I I / / / 112066 DRAINAGE DIVIDES ARE MEASURED AT THE / / J I I I 130 o I ao so 20 SCALE LIMITS OF DISTURBANCE OR DIVERSION I I DIKE. „ , I 1 = 3� I I I I I ( IN FEE ) SHEET NO. r I I I / HI --I I I I I / 1 nch — 0 Pt. 9 /'/' J I /' / I / N r4 I I I I ry N ICID Z) Co It rn Co LID Co PROPOSED SAFETY FENCE LO o I AROUND SEDIMENTTRAP o 00 ��� 0 m N I mow* b� � 1p \ I 1 � CP I \ \ S�1 ` '03"W 3. I BM I I I ♦ I � I O 3 \ � , 1 I • 1 / � 1 OAS - 10' WIDE - - - y TOP OF DAM SEDIMENT TRAP #1 DETAIL SCALE:1"=20' OUTLET PROTECTION SIZING NOTE: SEDIMENT TRAP 1 WILL BE CONVERTED TO A SEDIMENT BASIN ONCE OUTFALL PIPE HAS BEEN INSTALLED Table 16: Sediment Trap design (spec 3.13) Sediment Trap design #1 drainage area (acres) (< 2 ac) 1.96 B E' trap volumes: ORIGINALYAR ORIGINAL CREST OF STONE WEIR WUME' elevation (ft) area (sf) volume(cf) volume(cy) GROUND 632.00 1328.0 0 0.0 ELM. 1a ° 634.00 1944.0 3,252 120.5 DRY STORAGE - " p VMHffiE 636.00 2661.0 7,839 290.3 638.00 3478.0 13,960 517.0 0 0 0 0.0 WETSTORAGE (EIICAYATED) ♦' MAX. FLIER CLOTH dOGIHLL GROUND ELM wet storage: -SEE PULE 3.13-1 COARSE AGGIIEGATE•• CUSS I R~ wet storage required (cy) (67*DA*1.2) 157.6 bottom of stone weir (ft) 634.44 wet storage provided at this elevation (cy) 157.6 slope of wet storage sides 2:1 weir length (ft) (6xDA) 11.8 dry storage: bottom of trap elevation (ft) 632 dry storage required (cy) (67*DA*1.2) 157.6 bottom trap dimensions: 30'X45' crest of stone weir 636.2 top of dam elevation (ft) 638 dry storage provided at this elevation (cy) 157.6 top width of dam (ft) 10, slope of dry storage sides 2:1 top trap dimensions 54'X69' Sediment Trap design #2 drainage area (acres) (< 2 ac) 0.71 V VARIABLE trap volumes: ORIGINAL CREST OF STONE WEIR MIARE elevation (ft) area (sf) volume(cf) volume(cy) CROWD \ 588 595 0 0.0 ELEV. �a 1.0• 590 1200 1,760 65.2 DRYSTORAGE - ; YARPBE 592 2006 4,932 182.7 " 0 0 0 0.0 0 0 0 0.0 WET 5TORAGE V MAX. (0=MATED) FILTER CLOTH DIRGNAL GR IXD ELEV. wet storage: ,SEE PULE 3.13-1 COARSE AGGREGATE CLASS I RPRAP wet storage required (cy) (67*DA*1.2) 57.1 bottom of stone weir (ft) 589.75 wet storage provided at this elevation (cy) 57.1 slope of wet storage sides 2:1 weir length (ft) (6xDA) 4.3 dry storage: bottom of trap elevation (ft) 588 dry storage required (cy) (67*DA*1.2) 57.1 bottom trap dimensions: 23X43' crest of stone weir 590.8 top of dam elevation (ft) 592 dry storage provided at this elevation (cy) 57.1 top width of dam (ft) 6' slope of dry storage sides 2:1 top trap dimensions 41'X86' Sediment Basin Design #1 SCALE: 1"=20' MIN.1'WISPLLWAY CREST or EMERGENCY drainage area (acres) 2.75 P'WITHOUT SPILLWAY basin volumes: (using 2' contour intervals) DESIGN HIGH WATER elevation (ft) contour area (so volume(cy) (2A-YR STORM M.) 632.00 1328.0 0 -------- ----- J SER TO 634.00 1944.0 120 MIN. 1 D RISER CREST / / i 630POR PROPOSED NCLUDEA6' DEWATE RIM ELEV= �N O� DR STORAGE DEWATFA NG o p 636.00 2661.0 290 AT TIME OF TEMPORARY SEDIMENT TRAP#i'S - I 4' / / ti DEV10E / REMOVAL, THE CONTRACTOR SHALL REMOVE THE Z C4 n RING oy 638.00 3478.0 517 TEMPORARY BARREL CONNECTIONS INTO / 779'' N WET' STORAGE I/ ORIFICE (INV ELEV.=635.i8) & A TEMPORARY AT TIME OF TEMPORARY SEDIMENT BASIN #i'S 0.00 0.0 0 PERMANENT STIR. i AND OUT OF % I TRASHRACK. RISER SHALL BE FIRMLY ANCHORED REMOVAL, THE CONTRACTOR SHALL REMOVE THE 0.00 0.0 0 PERMANENT STR.& PLUG ITS OPENING SEgM.T STOWECI.EANOUREDUINTCED WATERTIGHT TO PREVENT FLOATING. RISER TO BE SET IN A TEMPORARY BARREL CONNECTION INTO (' wET STOMGE REwceD / I 0.00 O.O 0 TO 3A C.Y./ ACRE) / // MINIMUM OF 30" OF COMPACTED SOIL OR PERMANENT STIR. gA &PLUG ITS OPENING ylx I I I AGGREGATE VASE OVER A 8'X8'XY4" THICK WATERTIGHT TEMPORARY CONNECTION FROM PERMANENT ° 662 6 Cb" / I GALVANIZED STEEL BASE PLATE OR SET 6" (O C�5 o FOOT LONG AND ao � / � � STR-z TO PERMANENT STR-i. r 3 o a INTO AN 8'X8'Xi8" THICK REINFORCED \ ) / wet storage: 15" TEMPORARY CMP INV OUT=587.6z FROM STR-z / o \ 6 FOOT HIGH BAFFLES Ln I I I \ / wet storage required c 67*DA*1.2 221 design high water 638.79 / / 1 CONCRETE FOUNDATION. NOTE, IF STEEL BASE / 9 q (Y) ( ) 9 9 INV IN=587.1i TO TEMPORARY STR-A; SLOPE=i.33% IS USED SPECIAL ATTENUATION SHALL BE GIVEN \ / / dewatering orifice elevation (ft) 635.18 top of dam (ft) 639.79 / / i5" TEMPORARY CMP INV OUT=587.oi FROM STR-A; NO COMPACTION SO THAT 95%COMI - I ION IS / / wet storage provided at this elevation (cy) 221 top width of dam (ft) 6.0 0 o INV IN=586.24 TO PERMANENT STR-1; SLOPE=i.33% available volume before cleanout (cy) (34*DA) 94 bottom of basin (ft) 632.0 Lo �o (o' v N / �c�c x X cleanout elevation (ft) 633.53 approx. bottom dimensions: 45k30' / / SAF / h° 1+ x x X-X-X-X-- distance from cleanout to orifice (ft) (> 1') 1.66 upstream face slope: 2:1 (DD / I TP h� 7 downstream face slope: 2:1 IVA tO ST - dry storage: / PROPOSED iz' CLASS I I _ •�� A� dry storage required (cy) (67*DA*1.2) 221 baffles: YES I RIPRAP EMERGENCY principle spillway crest (ft) 637.79 length of flow, L (ft) 90 B ♦' I I SPILLWAY WI I I I dry storage provided at this elevation (cy) 221 effective width, We (ft) 43 FILTER FABRIC I - diameter of dewatering orifice (in) 4.0 L I We (baffles required if < 2) 2.1 I - ♦ I \ UNDERLAYMENT DEPTH = 2') diameter of flexible tubing (in) (orifice+2") 6.0 I 4:! SIDE SLOPS & collars: YES � I 1 I runoff. depth of water at spillway crest (ft) 5.79 /59 CREST ELEV.=638.79 L C (use 0.45 for bare earth) 0.45 slope of upstream face (Z' 1) 2 / low- - - - s \ 1r• r• Ir. r• m o o = tc (min) 10 slope of barrel (Sb) 4.17% 12yr 4.1 Q 2yr 5.1 length of barrel in saturated zone (Ls) 41.7 I 30 N \ 1 25yr 6.0 Q 25yr 8.2 number collars required 2 D dimension of permanent collars 4.1'x4.1' principle spillway: 7/ PROPOSED TEMPORARY 15" CMP 90-31 \ available head (ft) 1.00 emergency spillway: YES (00 \ \ \ \ �39 79 BARREL. THE CONNECTION BETWEEN 62 AC I _ \ THE RISER AND THE BARREL SHALL BE 11 SF \ \ diameter riser (in) 24 required capacity (Q25 Qp) (cis) 0.0 I \ 1 WATERTIGHT. LENGTH-64', spillway capacity, Qp (cis) 13.0 bottom width ft 12 I INVERT IN=632.00, INVERT OUT=629.33,' \ diameter trash rack (in) 36 slope of exist channel (ft/ft) 16% \ f� `SLOPE=4.37% barrel length (ft) 64 minimun length of exit channel (ft) 33 \ 6 .7 I head on barrel through embankment (ft) 9.46 crest of spillway (ft) 638.79 NOTE: POST SPACING SHALL diameter of barrel In 15 < G4 � SF W/WIRE MAXIMUM OF 8 FEET. HEIG ' T0, CR ,� \6'WI Sediment Trap design #3 ��SUPPORT SHALL BEAT LEAST 24 INC BUT NO GREATER THAN 3rainagearea(acres)(<2ac) 1.00 1' VAR''B'EDE TOP OF DAM trap volumes.. CREST DFSTONE WUR INCHES. � YMIARE � \ � elevation (ft) area (sf) wlume(cf) volume(cy) \ \ 1 \ - - - - - �, 588 941 0 0.0 ''` + PROPOSED SAFETY FENCE 590 1692 2,597 96.2 CONCRETE WASH AROUND SEDIMENT BASIN 592 2645 6,898 255.5 DRY STORAGE - R vARPRc OUT AREA , / 0 0 0 0.0 " k ♦ \ 0 0 0 0.0 WET STORAGE A, Lwx \ FAU T\ , \ �I \ 40 FOOT LONG AND I \ \ (ExuvATEo) FLIER CLOTH �Ho , \ HH H HHH ( --- - 6 FOOT HIGH BAFFLES I \ \ wet storage: .SEE PUTS 3.13-1 C0WIW AGGREGATE- CLASS I RPRAP �- \\\ wet storage required (cy) (67*DA*1.2) 80.4 _� 1 bottom of stone weir (ft) 589.67 ROAD wet storage provided at this elevation (cy) 80.4 R W D 1 I \I \ slope of wet storage sides 2:1 weirlen length SEDIMENT TRAP #3 DETAIL GRAVEL CONSTRUCTION g trap (6xDA) 6.8 PROPOSED TEMPORARYiS"CMPOUTFALLTOSBi / 1 GRAPHIC SCALE SITE ACCESS ROAD I I I dry storage: bottom of trap elevation (ft) 588 SCALE: 1"=zo' - ENGTH=353'; INV IN=640.73; INV OUT= 637.79 �I � � dry storage required (cy) (67*DA*1.2) 80.4 bottom trap dimensions: 28k49' x SLOPE=8.33% 20 0 10 20 40 I / � I crest of stone weir 590.8 top of dam elevation (ft) 590 dry storage provided at this elevation (cy) 80.4 top width of dam (ft) 6' C' r- n I R A r- n 1r n A r I n I u_ r%rr A II slope of dry storage sides 2:1 too trap dimensions 47'X92' J / TP TYPE LENGTH WIDTH DEPTH OP1 VDOT CLASS 1 A 8' 9.25' 1.5' OP2 VDOT CLASS 1 A 10' 9.25' 1.5' OP3 VDOT CLASS 1 A 16' 9.25' 1.5' SCALE: 1"=20' i + '� , �� IIIIII IIIIII � o, •� � •• Y i • J O ►i1i 1 i•�.1i11'i '�; � 1 •Ey'l.I.fl ( IN FEET ) 1 inch - 20 ft. Lie. No. 035791,E L. 10/19/20 �4' r z w f O I Z0 � ¢ z L 0 U Vin W J W � (n J Q u 0 ,a -, W Co z Q Lua w w w LU O N 00 00 o L9 O ZM O M �--- N a r V O WN J Q CST N U W 0 < z z aQ Z� J J J J . ^ W '�1� jLU 0 O J - O Q z Y W Y 0 O LU V C P U) z Ul LU W < 0 LU Lf) - U) 0 J z � Q � z O O O _ N � LU 0 a W LU V) JOB NO. D 112066 SCALE 1" = 20' SHEET 70. 10 PRE -DEVELOPMENT SWM PLAN: __ ' PROPOSED STORMWATER MANAGEMENT NARRATIVE FOR THE PROJECT: ,� _- --- � _---- � -- ---- � _ - PLAN: � '.._ _. __ T] - - / - SCALE 1"=60' - - - - / - - - - - SCALE 1"=6o' - OVERVIEW: ROOFSVILL DRAIN INT6� -- _ _ THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB DOWNSPOUTS ICH WILL TIE _. - --- ---- ---- --- REQUIREMENTS TO MITIGATE IMPACTS FROM THE PROPOSED IMPROVEMENTS. SUMMARIES / - i INTO THE C RRESPONi3ING YARD � � � � � � � � _ _--- _-- ---- ---- - OF THIS COMPLIANCE CAN BE VIEWED IN THIS VSMP SET AND IN THE ACCOMPANYING / - --- ----- - - LINE�S�BEHIND THE / - -- _ _ _ STORMWATER MANAGEMENT CALCULATIONS PACKET. SCOTT R. C+b,LLIINTS `I-. y ---- 0 -_ - i 68 Ego -682 �684' _ - - - _ ! / _ 680 ,682 �684' _ - STORMWATER QUANTITY: L) Lie. No. 035791,' 690 N-WOI'42^E 220J_4' ,6r 6$ I_ N31B'01'4'E 220_14- �1 6 CURRENTLY ALL OF THE EXISTING IMPERVIOUS AND PERVIOUS AREAS WITHIN THE PROJECT /6$2- }.--�._-,-_. ---. SAW � 6$$- / / / /6$2 KJRJEu,- 6$$_ LIMITS EXIT PROPERTY UNTREATED. THE PROPOSED PLAN WILL CHANGE ADO 10/19/2O t�� / / / / ■ 69° / / / / 69° _ _ DETENTION OF THE MAJORITY OF THESE ILL CAPTURE THE MAJORITY OF THE MPROVEMENTS IS REPRESENTED BY OSED IMPROVEMENTS. THE REAND '4ss O lyG1 \ -68 \ - / 9. 69z - / / 6g N5 0 °o mo ygz / POST -DEVELOPMENT SUBAREA A, WHERE AN UNDERGROUND DETENTION SYSTEM I NAL F / 4 , / _ / 4 +Co goy o �o y �- ATTENUATES THE RUNOFF. THE REST OF THE DEVELOPMENT CONTAINING THE EXISTING / RESIDENTIAL LOTS AND EMERGENCY ACCESS ROAD THROUGH THESE LOTS IS Tc 0. rs. / / / / / / REPRESENTED BY POST -DEVELOPMENT SUBAREAS B & C, WHERE A DETENTION BASIN 58' OF OLF d ELEV.=3' 6. . fit* \ ATTENUATES THE RUNOFF. CHANNEL PROTECTION IS MET VIA 9VAC25-870-66 SECTION SUBAREA C / 118 OP 07C. FLOW w/ ELEV.=6' \ I / J �(�$ ,8� I I B.3.a. FLOOD PROTECTION IS MET VIA 9VAC25-870-66 SECTION C.2.b. 0.73 aC. / / PLEASE SEETHE ATTACHED STORMWATER MANAGEMENT UANTIATIOMPLIAN E. FOR / \=SH �\ / ��/ / / I I I 6/ / ADDITIONAL DETAILS PERTAINING TO THE STORMWATER QUANTITY COMPLIANCE. /Tc=0.15 hrs. / / I (o�� 0 6' 6' �p / / STORMWATER QUALITY: THE STORMWATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT ARE MET " /�� ° THROUGH THE BEST MANAGEMENT PRACTICE OF PURCHASING NUTRIENT CREDITS. A SUBAREA B / _. --- I 1 rn 0.27 ac. 7�� HE BOUNDARY FOR Trig i HE MINIMUM PHOSPHOROUS REMOVAL RATE OF O T E ISSUANCE IS REQUIRED. THE DEVELOPER \ I HE B UNDARY FORT� -_ WILL PURCHASE NUTRIENT CREDITS PRIOR TO THE ISSUANCE OF A LAND \ I CN=58 0 / �� .� PRO SED LIMITS'OF I o „ i �� PRO SED LIMITS`OF DISTURBANCE PERMIT. Tc= .Ln 19 hrs. 6°1 o I R ANCE 4.36 at. IS 69 o ro I \ I / ' . ( ) I I X9 D R ANCE (4.36 aC.) IS z USE TO DEFINE THE \ \ / I PLEASE SEE THE ATTACHED CALCULATIONS PACKET AND THIS SHEET FOR ADDITIONAL w / �� 5o USE TO DEFINE THE DETAILS. �� ► RY FOR THE VR \ I RY FOR THE VR =0.is �e. 0� WATER QUALI O sx5 wo o WATER QUALI Ov \ �70' OF OL w E EV. 3' f- o° N CALCULATIONS P. \ a �° N CALCULATIONS P. z 49' OF ONC. FLO w d ELEV.=2' . ' �� \ mo s� al O Q Z - _ _ _ �� - _-�90=688 686-- - 4ti 9za ° 69° 8 - - � o \ o - I - - - -684_ - - - o 9 68� _ I = _686 -68 - - - - Lz CO w \ \ .'� _ -682=68oY = \ \ \ \ z - -682= 803- 4- - ,O(�A w U)i of \ \ I \ Tc= .1 hrs. 9 �_. 'r E- a _ r/ < Q Tc=0.10 hra \ \ \ 1✓±•' OF OLF w/ d LE =5' ~ Z a w _ / 30' OF OLF w/ E�=7 - I C) �' Q J , 34' OF CONIC FL011M1 wj D ELEV.=14� \ \ \ \ \ \7T �OF COaC. FLOW'•,\w/ d EV. -� U Z J \ \ / /1 400' `QF CHANNEL FLAW 0 6 5 6(P8 ` . / \ \ (S�� NICE=xOo' 9 > ~ Lu \ \ IF IN MON \ V - -- � a \ v AA 68 oNEv 6 s.. 68 - - - \ -� a^ \ \� 68 / sLu \ \ \ \ 4_ . .� I° CN=61 \ \ \ \ \ \ 4\ �kO Tc=0.16 hrs.l \ \ \ \ \ \ \ o �e - \ \ \ \ \ 682 - = - --- \ \ \ \ \ 68z \ \ \ \ \ 6 SUBAREPcA- 2.41 ac. s° 3 CN=74 - \ \ \ \ \ \ \ \ 6� 678 �� 4% =0.0 hrs. "- \ \ \ \ \ 6` Tc=0.21 hrhrs. �_ UNDERGROUND �a' \ \ \ \ \ \ \ 674 - - - - , '� 6-- / \ \ \ \ \ \ \ DETENTION \ \ \ \ \ \ \ \ \ �fi - - ,J67� ` / \ \ \ \ \ \ swM '6?? 11 - 6 67 hl6�z 6 - \ \ o 1 \ \ \ \ \ \ 67o 11+ V A \ 6668 - - 668 - \ 66 - 0.2T-Ers. °m \ \ \ \\ \ 666 1 �\ / / a \ a �� \ \ \ \ \ 60' OF OLF w d ELEV.=3' L rP\ / \ \ \ \ \ \ \ \ \ \ 6641 796' OF CONZ�Lov�/ v.-1oa' a \ / / / \ \\ \ \ \ \ 664 o \ \ \ VA \\ 66z --- - - °m� /� V A \ \ AAA\-- 662 \ \ \ \ \ \ 66$ aL Sr `a\\�/ / / / / \ \ \ \ \SUBAREA B 4-66z 6 L, �_/ / / / Z- \ \ \ \ \ 656 - -ssp / \ \ \ \ CN=81 656. yT-�� 0 6' A s \\ \ \ \ \ \=0_10- o -54 65� - - 63k �� \ \ �\ \ - -- 652 6� - • -6E CN$ 75 \ \ \ \ \ \ 650 - r / - Sz - = - \ \ \ \ 6 6 i T - 0 h rs z - � \ \ - -� - - 650 \ _ - _ \ \ \ \\�\ - $O - -� $� Y1 6 o \ - \ \ \ \ \ \ 648 _ �� 648 HE B Y_ f \ \ \ \ \ \ I \ 648 ,65 48 13 - J \ \ \ \ 646 646- PROP__ - \ \ \ \ Tc=o.10 hrs. 6 i�'S� -646- cM PROPOSE -LIMIT OF \ f \ -b44 - -- \ 44' OF -OLF -A ELEV=5' Z b PROPOSED- \ \ 644 / \ - oqz TURBANC€ (4. ac, \ \ \ \ 123" CHANNEL- 0.56 ft/s 644 6 065 - oyzo - URSANC€ 4. ac_.cyi - -64z / - �O4° SED�O-DFF t#E \ \ \ \ \ CHANNEL FLOW 0 10 ft%s -64z - 4 6 ,64g 5 �u4 SED T8 LfEF 640 - F 8 - -BOUNDARY- FOR THEVI li\ \ \ \ \ \ \ 640 6N 3A �F 8� BOUNDARY FOR THE V M\\ N I �� 636- - \ \ \ - I - - - - - - / - WAR QUALITY \ - - - 0 64z g� 636- _ \ \ \ \ 638 6 -` \� \ \ \ \ - -_ 638 640 63 - WATER QUALITY \� M CALCU - - - / = 31 34)3' W 3 }0 �KLCU I \ \ \ - - - g ` `636 31 63413"W 3 9 �\ 636 6f3z- \ - - - 636 I 562- - - \ 634- I \ // $ _-� \ 1 \ \ \ - 634= i �$ - 63� _ /� _ z6 \ - \ - 632 i i (ii 3 z6 ---� 624- CN \ 630 I IN M01� / \ 630 A r N �E\ \\ v ?, z Q 68 � \ I- baa24�sQ 6"o 62y J ■ - i V A v v A o�0 624 1 i� /` 6�2 1iC _ �6 8� ��\ \ V v v A '624 6-"C- 3C �" 6' 8 - �W \ \ \ \ \ \ \ 6zz . �1 �j �//229; �, 1 S�� \r 6z�s \ \ J I \ \ \ \ \ \ ` N 62z - g 1 - -6z� so-o oi�w/ d ELEV.=7.5 J I J z \ 55�F CONIC. FtOW w/_d ELEV.-88' J w 620 �� /jam ��Sa� VA - A V VA -�nm 6zo22 /� ��61 VA - A i \ ?0 �6i8618- WQ ~ "Ws 6 0(9 \�y 6z6 6z6 \ >614- /-1-6 g°:sJ1 zk \ _< 610' -�6oz �6oz,610- 6'° QCG� - - - - 606� / ■ \ J, b06� / � SWM 2 S9,9 \ �\ \ / L1J -604� �� � � A � v � �604� �/ � / �5 - ■ � s96 � �\�-i/- � � Q \ \ -602- / / \ -604 I / / o _ DETENTI09 7 \ \ CJ 6o2 �� Y I jL \ f S94 =� \ - - 602 �� Y h° 1 S9 BASIN C/� L LOCATION OF \ -600- I (n -600- / / PROPOSED -S9z \ \ \ \ \ - - - = 8 _ /`� -592 /,�M 2 \ Pre -Development Impervious Area Summary O � \ \ \ _ - \❑ 598 - PON ON Syo \ \ - \ - - - - \ 598 / // 1s9p E IX srING RO DSIDE LODforWaterQuality W > O $ . \ \ \ \ \ \ / $ /I . rigz DITCH Building 488Isf LU Q 19 L / - - - - \� g / 90 S' TO BE LINED WITH VDOT TRoads/Drivewa s 19,995 � - 5 sG ssCLASS II _�y2 EN \ \ �92 5$588 `P EN OR OUTLETOROTEICTION y 20,483 9' 0 \ � - - -- q i' Sgo y 2 \ \ / \ � _ _ - � ;per Sgo �� 24 \ \ / Post -Development Impervious Area Summary � OUT / \ --\ ---- \ -/ - / - - 5 -- \ - - � Sgg_ � 'C�4 / � � - \ \ � _ - - 588 � � `�5 / //. � - ROADSIDE � � 7Build Dorg ater Qualit 25 801 sf w \ - - --- \ -586 ��/ / �_ - _ �- \ \ - ---- --- - \ -5$6 tip/ / / �OUTFALLSTO ngAreas/Roadsy 46,636sf 84LB� \ _ \ SS L�/-- walks &Concrete 7,037 sf Q \ EXISTING 24" - _ CMP � -__ � 79,474 General Construction notes for Stormwater O Management Plans Post -Development Impervious Area Summary N 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture Subarea A, Water Quantity CHANNEL &FLOOD PROTECTION SUMMARY content. All fill material to be approved by a Building 26169 sf WATERSHED SUMMARY geotechnlcal engineer. A geotechnlcal engineer Is to be present during construction of dams. ParkingAreas/Roads 34,179 sf 2. Pipe and riser joints are to be watertight within stormwater Management facilities. Sidewalks & Concrete 6,979 sf 3. For temporary sediment traps or basins which are 67,327 sf to be converted to permanent stormwater ' management facilities; conversion is not to take Subarea B, Water Quantity place until the site is stabilized, and permission has Building/Structure 1,597 sf been obtained from the erosion control inspector. Roads/Driveways 7,374 sf CN Area, ac. 1-year Flow, cfs 2-year Flow, cfs 10-year Flow, cfs DA A, B, C, & D (Pre-Dev) 70 4.36 3.71 5.85 13.32 CN Area, 1-year Flow, 2-year Flow, 10-year Flow, Post 82 4.36 1.31 4.37 13.29 Pre-Dev. Post-Dev. Method of 9VAC25-870-66 Method Analysis VAC25 Chann Method of 9VAC25-870-66 Method of 9VAC25-870-66 Subarea Subarea Channel Protection Compliance LimitsofrotecforChannel Flood Protection Compliance Limits of Analysis for Flood Protection Protection A, B, C, & D A, B, & C Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.b (10 yr. Post Flow < Pre Flow) N/A (10-yr. Post Flow < Pre Flow Satisified) GRAPHIC SCALE Pre -Development Impervious Area Summary 8,971 sf 60 0 30 60 120 240 Subarea A Subarea C, Water Quantity NOTE: Sub-Area'A' is routed through Underground Detention System'SWM 1' and Sub -Areas B & C are Building/Structure 3,924 sf Building/Structure 348 sf Roads/Driveways 18,845 sf Roads/Driveways 2,869 sf routed through Detention Basin'SWM2' IN FEET 22,769 sf 3,217 sf 1 inch = 60 IT, F- Lu w w a V) JOB NO. 112066 SCALE 1"=6o' SHEET NO. 11 n STR:4 VDOT MH 675 of -42 675 INV IN: 658.46 TO SWM (2) PROPOSED ACCESS MH W/ STAII INV IN: 66o.44 TO 4A INV OUT: 652.46 TO 3 FOR INSPECTION & MAINTENAN 670 m 670 �o _ ^ 'COVER RESTRICTIVE WEIR PI 00 L OW POI NTTO DRAII Op a� SEE DETAIL ON THIS 665 > coW > ER667o 665 Fd 2-YRPEAK PROPOSED GRADE (TYP.) EA V) 1--z Z WSE i2 PROPOSED LOWER 1Ic UNDERGROUND DETE SYSTEM PRIMARY OU 66c 66o / WEIR PLATE INVERT=559.00 65 m 15" RCP 11.84 LF (al 4.56% 655 z:^� OUTFAL INVERT=658.4 PROPOSED 96" CMP U m SYSTEM Qa o.5o%TO) p rmn N' 0 0 miO FROM THIS DEVELOPP TOTALCMPLENGTH= SAFETY SLAB 65 Z o F Q > N F- z - olo (SL-1) REQ'D 65o � / 1"Izp e (y. 645 645 64 MID SAFETY SLAB 640 0 m olo (SL-1) REQ'D 0 N 0 19 p m a w (Q t� 0• 00 > 63 mMLD N 0 ��� v 635 11 ra.> > L ZZ 6� / 630 EXISTING GRADE (TYP.) 630 p SAFETY SLAB m Om MJ- CQ REQ'D 625o P � o0olo(SL-i) 9c tif, 625 _ko 0 KI o H tD �V p m > � �- F by1 rn If 0/ 62 w 11 Q- >> Ln F- ? z - 620 6:L5 615 do SAFETY o1o(SL-1) SLAB REQ'D N v 0 9-c/� 0� F- 00 "i 00 0)61 O�m O (00,1 MF- >IQ 610 pZZZZZ0 �dF / 6o 6o5 p MID _ 0 N O m ON 00 0 o ^ SAFETY SLAB 60 a� N a) Z Q ooN (SL-1) REQ'D 60o F--N00 O Z Z �` �0 > N �F- to 1-- O 9ry� 63 I) �a>> LAF-ZZ_ 595 595 59 y5 RCP335Mo � 590 LF 58 -91.28 15„ RCP LF 1.51% 585 2S" RCP 23.79 LF Cal 1.00% 58 58o °o o rn o D °. o o m °' ° ^� o "' 00 ID OOl of Ol d 0) IXILn tD N H ri N N m m M 00 ko m 00a) O lD U) l�l1 U) lD w UJ UJ D 0 UJ -0+50 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 SWM 1 TO OUTFACE PROFILE tS ZE .ATE AT 4THE SYSTEM iHEET 11 NTION TFALL VDERGROUND DETENTION ,TTENUATE RUNOFF CAUSED 1ENT. L80.00' 5+50 6+oo 6+50 7+00 PROFILE SCALES i"=5' (VERTICAL) i"=5o' (HORIZONTAL) PROPOSED ACCESS MH w/ STAIRS FOR INSPECTION & MAINTENANCE, TYP. - ACCESS MH TO BE LOCATED UPSTREAM & DOWNSTREAM FROM RESTRICTIVE WEIR PLATE AND AT THE MIDPOINTS & HIGH POINTS OF THE SYSTEM, AS SHOWN. 096" INV. 559.48' RESTRICTIVE STEEL WEIR PLATE, AT LOW POINT, TO DRAIN THE SYSTEM. SEE DETAIL ON THIS SHEET. 06 LF 0 � % Ln CDCD O 096" INV. 55 .42' - - - - 8 TF @ 0.5% n _ CONTRACTOR SHALL CALL THE COUNTY INSPECTOR & ENGINEERING DEPARTMENT 24-HOURS BEFORE - ANY ANTICIPATED CONSTRUCTION ACTIVITIES FOR _ THE BMPs. THIS IS INCLUSIVE OF WHEN THE UNDERGROUND DETENTION SYSTEM SUBGRADE IS - READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. UNDERGROUND DETENTION DETAIL: SCALE -- FACILITY INSPECTIONS DURING CONSTRUCTION: CONSTRUCTION INSPECTIONS ARE CRITICAL TO ENSURE THE UNDERGROUND DETENTION SYSTEM IS PROPERLY BUILT. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER, COUNTY INSPECTOR AND CONTECH REPRESENTATIVE PRIOR TO INSTALLATION. CONTECH, OR AN EQUIVALENT PIPE MANUFACTURER, SHALL BE CONTACTED WELL AHEAD OF THE CONSTRUCTION START DATE TO ENSURE ADEQUATE LEAD TIME FOR MATERIALS AND DELIVERY. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER, COUNTY INSPECTOR & PIPE MANUFACTURER, DURING THE FOLLOWING STAGES OF THE UNDERGROUND DETENTION SYSTEM CONSTRUCTION PROCESS: 2. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATIONIGRADING(E.G., INTERIM/FINAL ELEVATIONS). 4. WHEN THE DETENTION PIPE SUBGRADE IS READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. S. AFTER STONE BEDDING IS PLACED AND COMPACTED, BUT PRIOR TO PIPE INSTALLATION. 6. ATTHETIME OF THE PIPE INSTALLATION. 7. AFTER PIPE INSTALLATION, BUT PRIOR TO PLACING FILL OVER THE SYSTEM. 8. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) PLEASE ALSO SEE BELOW, UNDER FACILITY MAINTENANCE, FOR REQUIRED INSPECTIONS AFTER INSTALLATION IS COMPLETE. FACILITY INSPECTIONS & MAINTENANCE AFTER CONSTRUCTION: THE FOLLOWING MAINTENANCE TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING THE INSTALLATION OFTHE UNDERGROUND DETENTION SYSTEM. i. FOR THE FIRSTYEAR FOLLOWING CONSTRUCTION, THE SITE SHALL BE INSPECTED BYTHE CONTRACTOR QUARTERLYAND AFTER STORM EVENTS THAT EXCEED 2/2 INCH OF RAINFALL. 2. THE CONTRACTOR SHALL LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA AND AROUND THE UNDERGROUND DETENTION SYSTEM AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED. CONTRACTOR SHALL SPOT RESEED AS NECESSARY AND ENSURE ADEQUATE SITE COVERAGE IS PROVIDED WITHIN THE FIRST YEAR. AT THE QUARTERLY INSPECTIONS, AND AFTER EACH RAINFALL EVENT IN EXCESS OF i,", THE CONTRACTOR SHALL PERFORM THE ANNUAL MAINTENANCE TASKS DESCRIBED BELOW IN#3. AFTER THE FIRST YEAR THE OWNER SHALL PERFORM FOLLOW-UP INSPECTIONS ANNUALLY, AND AFTER EACH SIGNIFICANT RAINFALL EVENT: 3. A SPRING MAINTENANCE INSPECTION AND CLEANUP SHALL BE CONDUCTED ANNUALLY. THE MAINTENANCE PROGRAM FORTHE UNDERGROUND DETENTION SYSTEM SHALL INCLUDE CLEANING IT ANNUALLY OF TRASH, DEBRIS & SEDIMENT AND ENSURING THE INTEGRITY OF THE WEIR PLATE, TRASH RACK AND OUTFALL & INFLOW PIPES. THE OWNER SHALL ENSURE THE SYSTEM IS OPERATING AS INTENDED AND IS NOT CLOGGED OR DAMAGED. THE OWNER SHALL IMMEDIATELY CLEAN & REPAIR THE FACILITY AS NECESSARY AND SHALL PAY SPECIAL ATTENTION TO THE INLET AND OUTLET LOCATIONS. THE ACCESS MANHOLES SHALL BE USED FOR INSPECTION AND MAINTENANCE. UNDERGROUND DETENTION SYSTEM GENERAL NOTES: 1. TRASHRACKS SHALL BE INSTALLED ON ALL ORIFICES, INCLUDING THOSE LOCATED ALONG THE WEIR PLATE WITHIN THE UNDERGROUND DETENTION SYSTEM, IN ACCORDANCE W/ THE DETAIL SHOWN ON ON THIS SHEET (OR EQUIVALENT). 2. DETENTION SYSTEM's WEIR PLATE TO BE PRE -MANUFACTURED AND DELIVERED TO THE SITE. WEIR PLATE SHALL BE SECURELY AFFIXED TO THE INSIDE WALLS OF THE MANHOLE STRUCTURE. 3. PRIVATE DESOTO COURT LOCATED WITHIN THE SWM EASEMENT, SHALL SERVE AS ACCESS TO THE PROPOSED UNDERGROUND DETENTION SYSTEM. 4. CONTACT COLLINS ENGINEERING(434.293.3719) REGARDING ANY QUESTIONS CONCERNING THE UNDERGROUND DETENTION SYSTEM. 5. ALL FILL EMBANKMENT MATERIAL SHALL CONSIST PREDOMINANTLY OF SOIL AND BE PLACED IN SUCCESSIVE UNIFORM LAYERS NOT MORE THAN 8 INCHES IN THICKNESS BEFORE COMPACTION OVER THE ENTIRE AREA IN ACCORDANCE WITH CURRENT VDOT ROAD AND BRIDGE SPECIFICATIONS, OR THE FILL EMBANKMENT MATERIAL SHALL MEETTHE PIPE MANUFACTURER's SPECIFICATIONS OUTLINED BELOW (WHICHEVER IS MORE STRINGENT). 6. ALL FILL SHALL BE PLACED AT 95% COMPACTION AND TESTED BY A GEOTECHNICAL ENGINEER TO ENSURE COMPACTION IS REACHED AND MAINTAINED, OR THE FILL SHALL MEET THE PIPE MANUFACTURER's SPECIFICATIONS OUTLINED BELOW (WHICHEVER IS MORE STRINGENT). 7. VDOT STD. IS-1 & ST-1 ARE REQUIRED ON ALL PROPOSED PUBLIC STRUCTURES AND THE UNDERGROUND DETENTION SYSTEM's JUNCTIONS. 8. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL TEST -DIG ATTHE EXISTING INLET & OUTFALLTO CONFIRM THE INVERTS AND TO ENSURE THE PROPOSED GRADES CAN BE ACHIEVED. CONTRACTOR SHALL CONTACT COLLINS ENGINEERING OF ANY DISCREPANCIES IN THE HORIZONTAL OR VERTICAL ALIGNMENT PRIOR TO ORDERING AND CONSTRUCTION. 9. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION INDUSTRY (29 CFR PART 1926). 10.PENDING PRIOR APPROVAL BY COLLINS ENGINEERING, THE DRAINAGE PIPE MATERIALS MAY BE SUBSTITUTED. ALL DRAINAGE PIPE INSTALLATION PRACTICES SHALL BE IN ACCORDANCE WITH CURRENT VDOT STANDARDS AND REQUIREMENTS. CONTRACTOR SHALL ENSURE MINIMUM COVER REQUIREMENTS ARE MET WITH ANY PIPE SUBSTITUTION. OUTLET PROTECTION SUMMARY: SEE CALCULATIONS PACKET FOR FULL OUTLET PROTECTION CALCULATIONS. OUTLET PROTECTION INTO SWM 2: OUTLET PROTECTION TO INCLUDE A FILTER FABRIC UNDERLAYMENT KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS & ALONG THE PERIMETER. EDGES OF FABRIC SHALL OVERLAP A MINIMUM OF 9". STONE TO BE VDOT CLASS Al STONE WITH THE FOLLOWING DIMENSIONS: La=16FT(TO EXTEND TOWARDS THE BOTTOM OF BASIN) w1=3.75FT w2=9.25FT DEPTH=I.5FT RIPRAP CHANNEL FOR OUTLET PROTECTION FROM SWM i AND SWM 2: OUTLET PROTECTION TO INCLUDE A FILTER FABRIC UNDERLAYMENT KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS & ALONG THE PERIMETER. EDGES OF FABRIC SHALL OVERLAP A MINIMUM OF 9". STONE TO BE VDOT CLASS II STONE AT A DEPTH OF36INCHES 664 f II • • FSlJ�Ff_�!f • PROPOSED ELEVATED 015" PIPE ALLOWS \ MORE SIGNIFICANT & LESS FREQUENT STORM EVENTS TO SAFELY BYPASS THE UNDERGROUND DETENTION SYSTEM PROPOSED LOWER 015" UNDERGROUND DETENTION SYSTEM PRIMARY OUTFACE 11+p0 0J96" WEIR PLATE DETAIL NOTE: WEIR PLATE TO BE BOLTED & SCALE:1"=5' SEALED TO DETENTION SYSTEM WITH WATERTIGHT CONNECTIONS. 3.87' OVERFLOW WEIR IS HYDRAULICALLY If�ll EQUIVALENT TO AN ORIFICE WITH AN ELEV.=667.00' APPROX. DIAMETER OF 013.13" (TOP OF PIPE) ELEV.=664.30' MANUFACTURE / INSTALL ONE (1) 06" X 08" MID -FLOW ORIFICE IN THE STEEL PLATE (INVERT ELEVATION 664.30') REINFORCED GA. INSTALL TRASH RACKS ON ALL STEELPLATE ORIFICES, TYP. SEE THIS SHEET FOR DETAIL, OR EQUIVALENT. ELEV.=659.00' (BOTTOM OF F MANUFACTURE / INSTALL ONE (1) 03" LOW -FLOW ORIFICE IN THE STEEL PLATE AT THE LOW POINT OF THE DETENTION SYSTEM (INVERT ELEVATION 659.00') 685 685 rl d LnO of 68 0 014 8o i­-4m N l0 LA NSF ko?O CL LnZ_Z_ STR:4 VDOT MH 675 TP=670.41 INV IN: 658.46 TO SWM 1(2) INV IN: ROPOSED 660.44 TO 4A r GRADE (TYP.) INV OUT: 652.46 TO 3 z B /-EXIS ING GRADE (TYP.) PROPOSED ELEVATED i5" PIPE 665 65 ALLOWS MORE SIGNIFICANT& LESS FREQUENT STORM EVENTS TO SAFELY BYPASS THE UNDERGROUND 15" RCP DETENTION SYSTEM 17.S5 LF Cal i5.96% i5" RCP J 10 LF Qa 15-94% 65 55 PROPOSED 96" CMP UNDERGROUND DETENTION SYSTEM Qa o.5o%TO ATTENUATE RUNOFF CAUSED FROM THIS DEVELOPMENT. TOTAL CMP LENGTH=180.00' SAFETY SLAB_ 65 (SL-1) REQ'D )50 00 ot W V7 � -0+50 0+00 0+50 EMERGENCY BYPASS PROFILE SCOTT/R. CULLINS'Z Lie. No. 035791 A 10/19/20 4rj z W U) O Z z o a z M 0L cr m U U � w K wU p U)¢ J O m > z ¢ > W c Lu a ce U) Lu ON I r4 M In D C. W Lu C) 0 C) N m-_ F- LU O w CL _ a in JOB NO. 112066 SCALE AS SHOWN SHEET NO. 12 HUGGER SINGLE BAR, BAND FLAT GASKET BOLT AND STRAP(SBBS) FLAT GASKET CONNECTION DETAIL (SBBS) 2 2/3"x1/2" RE -ROLLED END HEL-COR PIPE GENERAL NOTES: 1. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26A.2.4. 2. BAND MATERIALS AND/OR COATING CAN VARY BY LOCATION. CONTACTYOUR CONTECH REPRESENTATIVE FOR AVAILABILITY. 3. BANDSARE SHAPEDTO MATCHTHE PIPE -ARCH WHEN APPLICABLE. 4. BANDS ARE NORMALLY FURNISHED AS FOLLOWS: • 12" THRU 48' 1-PIECE • 54" THRU 96' 2-PIECES • 102"THRU 144'3-PIECES 5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS. 6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2213'1/2' 7. DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES. 8. ORDER SHALL DESIGNATE GASKET OPTION, IF REQUIRED (SEE DETAILS ABOVE). H-12 HUGGER BAND DETAIL NOT TO SCALE 20 MIL PE IMPERMEABLE LINER OVER TOP OF PIPE LIMITS OF (IF REQUIRED) REQUIRED BACKFILL 96" TYP 36'TYP 30" SEE TYPICAL BACKFILL DETAIL NOTES TYPICAL SECTION VIEW NOT TO SCALE NOTE: IF SALTINGAGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE PROJECT, A GEOMEMBRAN E BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE EFFECTS THAT MAY RESU LT FROM A CHANGE IN THE SURROUNDING ENVIRONMENT OVER A PERIOD OF TIME. PLEASE REFER TO THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL INFORMATION. UNDERGROUND DETENTION SYSTEM MINIMUM TRENCH & BACKFILL REQUIREMENTS 1. THE TRENCH CONTAINING THE DOUBLE RUN OF 96" CMP STORM PIPE SHALL HAVE A 288" WIDE TRENCH. THE TRENCHES CONTAINING THE 15" BYPASS HDPE PIPE AND THE 15" OUTFALL PIPE SHALL HAVE 361, WIDE TRENCHES. CONTRACTOR SHALL WRAP THE EXCAVATED TRENCHES WITH A 6 OUNCE FILTER FABRIC CLOTH. A SUITABLE FOUNDATION SHALL BE BENEATH THE TRENCHES' FILTER FABRIC CLOTHS. 2. TRENCHES TO INCLUDE A 6"#S7 STONE BED AT 95% COMPACTION BENEATH THE HP STORM PIPES. 3. TRENCHES SHALL BE BACKFILLED WITH #57 STONE AT 95%COMPACTION AND SHALL EXTEND A MINIMUM OF 6" VERTICALLY ABOVE THE CROWN OF THE STORM PIPES. 4. THE TOP OF THE #57 STONE SHALL BE COVERED WITH A 6 OUNCE FILTER FABRIC CLOTH, OVERLAPPING THE PREVIOUSLY INSTALLED CLOTH THAT SURROUNDS THE BOTTOM AND SIDES OF THE TRENCHES. S. SUITABLE FILL REACHING THE FINISHED GRADES SHALL BE APPLIED ABOVE THE TOP LAYER's FILTER CLOTH, MEETING MINIMUM PIPE MANUFACTURER's REQUIREMENTS TO PREVENT FLOATATION AND ENSURE PIPE INTEGRITY IS MAINTAINED. 6. A MINIMUM COVER OF 12" IS REQUIRED ABOVE THE CROWN OF THE STORM PIPES. 7. SEE THE'TYPICAL BACKFILL DETAIL' ON THIS SHEET FOR ADDITIONAL UNDERGROUND DETENTION SYSTEM PIPE REQUIREMENTS. INITIAL BACKFILL w o do Sa \ 7 q p � X 5 eo 1 11 BEDDING 3//�� ''-r,,, ✓ z'f- , r FOUNDATION 2 IN SITU I /2' zinc plated hook attached with 3/6' fasfem i ®� ® 2-1/0' diehole. • CO ®®® Isometric 1/4' HDPE ptato (optional) 1. Pr w HDRF2-1/ "tructnral pl1/4 n Q hales and IJ." p„ im.a.f OOzn .thin. trod by ?I.1 OOO9olullonn rat, or cQu.l 0000 +."�i•- • .no.v rue "puore] prate HDPF a-urturel pin.lir with - 2-1/0" holes and 1/9 plate m CLIO❑ ecufacturad by Plmsthe solution. Inn. or c".1 6/B' di. holy 0 0 1 o O o OD 4 O O Elevation a dike DEBRIS CAGE �LASTIC SOLUTIONS P.O. Ras a:1fl6 xmrn mrr ct aws INC. BTY-BTY-6Y2Y .w.plelie-wluie eom DIAMETER MIN. COVER CORR. PROFILE Ti 12" 1 1/2" x 1/4" 12"1 12" 2 213" x 1/2" 54"1 12" 3" x 1 5" x 1" 102"1 D/8 3" x 1 5" x 1" INITIAL FILL ENVELOPED is BACKFILL REQUIREMENTS FOLLOW THE GUIDELINES OF AASHTO LRFD BRIDGE DESIGN (SEC 12) AND CONSTRUCTION (SEC 26) 1 MIN IMU M TRENCH WIDTH MUST ALLOW ROOM FOR PROPER COMPACTION OF HAUNCH MATERIALS UNDER THE PIPE. THE MINIMUM TRENCH WIDTH (12.6.6.1): PIPE <_ 12": D+16" PIPE > 12": 1.5D+ 12" 1a MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE (12.6.6.2): PIPE <24": 3.OD PIPE 24" - 144": D + 4'0" PIPE > 144": D + 10'0" 2 THE FOUNDATION UNDER THE PIPE AND SIDE BACKFILL SHALL BE ADEQUATE TO SUPPORT THE LOADS ACTING UPON IT(26.5.2). 3 BEDDING MATERIAL SHALL BE A RELATIVELY LOOSE MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, AND A MINIMUM OF TWICE THE CORRUGATION DEPTH IN THICKNESS, WITH THE MAXIMUM PARTICLE SIZE OF ONE-HALF OF THE CORRUGATION DEPTH (26.3.8.1, 26.5.3). 4 CORRUGATED STEEL PIPE CSP /HEL-COR). 5 HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION (26.5.4). 5a INITIAL BACKFILL FOR PIPE EMBEDMENT TO MEET AASHTO A-I,A-2 OR A-3 CLASSIFICATION, OR APPROVED EQUAL, COMPACTED TO 90% STANDARD PROCTOR (T 99). MAXIMUM PARTICLE SIZE NOT TO EXCEED Y (12.4.1.2). ALL LIFTS PLACED IN A CONTROLLED MANNER. IT IS RECOMMENDED THAT LIFTS NOT EXCEED AN 8" UNCOMPACTED LIFT HEIGHT TO PREVENT UNEVEN LOADING, AND THE LESSER OF 1/3 THE DIAMETER OR 24" AS THE MAXIMUM DIFFERENTIAL SIDE -TO -SIDE (26.5.4). 6 INITIAL BACKFILL ABOVE PIPE MAY INCLUDE ROAD BASE MATERIAL (AND RIGID PAVEMENT IF APPLICABLE). SEE TABLE ABOVE. 6a TOTAL HEIGHT OF COMPACTED COVER FOR CONVENTIONAL HIGHWAY LOADS IS MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT OR TOP OF RIGID PAVEMENT (12.6.6.3). 7 FINAL BACKFILL MATERIAL SELECTION AND COMPACTION REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER THE ENGINEER OF RECORD (26.5.4.1). NOTES: • GEOTEXTILE SHOULD BE CONSIDERED FOR USE TO PREVENT SOIL MIGRATION INTO VARYING SOIL TYPES (PROJECT ENGINEER). • FOR MULTIPLE BARREL INSTALLATIONS THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE PIPE DIA./2 BUT NO LESS THAN 12", OR 36" FOR PIPE DIAMETERS 72" AND LARGER. • CONTACTYOUR CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING (TABLE C12.6.7-1). TYPICAL BACKFILL DETAIL PLAN FRONT 48"0 to 90"0 FITTING REINFORCEMENT MAY BE REQUIRED BASED ON HEIGHT OF COVER AND LIVE LOAD CONDITION TYPICAL MANWAY DETAIL NOT TO SCALE TEMPORARYCOVER FOR CONSTRUCTION LOADS HEIGHT OF COVER 110]1���ZbA: FINISHED GRADE FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRAAMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER THE TOP OFTHE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. THE USE OF H EAVY CONSTRUCTION EQUIPMENT NECESSITATESGREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE COVER MINIMUMS FOR NORMAL H IGHWAY TRAFFIC. AXLELOADS PIPE SPAN, INCHES (kips) 18-50 1 50-75 1 75-110 1 110-150 MINIMUM COVER (FT) 2.0 2.5 3.0 3.0 12-42 48-72 3.0 3.0 3.5 4.0 78-120 3.0 3.5 4.0 4.0 126-144 3.5 4.0 4.5 4.5 *FAIN IMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL COVER REQUIRED TO AVOID DAMAGE TO THE PIPE. MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO THE TOP OFTHE MAINTAINED CONSTRUCTION ROADWAYSURFACE. CONSTRUCTION LOADING DIAGRAM NOT TO SCALE A 36"0 MAX., HS-25 ACCESS CASTING WITH GRADE RINGS AS REQUIRED, TO BE PROVIDED AND INSTALLED BY CONTRACTOR. MAYBE TOP MOUNTED CMP (AS SHOWN) OR RECESSED PROTECTION RIMlFINISHED w SLAB ---_-- GRADE _ -----_ _� VARIES O • _ G d tl. GASKET MATERIAL E CMP RISER SUFFICIENT TO PREVENT SLAB FROM BEARING ON o RISER TO BE PROVIDED BY CONTRACTOR. OB 11"TYP. rn im SECTION VIEW ACCESS CASTING NOT SUPPLIED BY CONTECH d+ L`cP B 94 DIAGONAL TRIM BAR (TYP.4 PLACES), SEE NOTE 7. II II .1 II I OPENING IN PROTECTION SLAB FOR ACCESS SPECIFICATION FOR CORRUGATED STEEL PIPE-ALUMIN [ZED TYPE 2 STEEL SCOPE HANDLING AND ASSEMBLY THIS SPECIFICATION COVERS THE MANUFACTURE AND SHALL BE IN ACCORDANCE WITH RECOMMENDATIONS OFTHE INSTALLATION OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) THE PROJECT PLANS. INSTALLATION MATERIAL SHALL BE IN ACCORDANCE WITH AASHTO STANDARD THE ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TOTHE SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II APPLICABLE REQUIREMENTS OF AASHTO M274 OR ASTM A929. OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR PIPE CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE WITH THE SITE ENGINEER. THE CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE APPLICABLE RECJIREMENTSOFAASHTOM360RASTMA760, THE IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO PIPE SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. THE PROJECT PLANS. ALL FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE UNITED STATES. MATERIAL SPECIFICATION NOT TO SCALE 1,i 2Y2" REBAR CAN BE CUT FLUSH - o ALL STEEL PER TO OUTSIDE OF RAIL TO A36 (BAR LENGTH = 163") OR BAR CAN o d /4 EXTEND BEYOND RAIL Y2"t FABRICATION TOLERANCE: tV4" o FLATBARANDREBAR:MILL 318" TOLERANCE APPLIES TYP. 12" TYP. CENTER TO CENTER W HOLE WI %" REBAR RUNG, RUNG SPACING �o WELD REBAR TO RUNG ON OUTSIDE OF STEEL RAIL 0 2Y2" x Ye" FLAT BAR SIDE RAIL PLAN SIDE NOTES: 1. LADDERS CAN BE MADE IN 20'1 STANDARD LENGTHS AND CUT TO FIT 2. ALL MATERIAL TO MEET ASTM A36 3. LADDER TO BE HOT DIPPED GALVANIZED PER ASTM A-123 AFTER FABRICATION IS COMPLETE STANDARD LADDER DETAIL NOT TO SCALE PART NO. HALAGVL16 PROVIDE MINIMUM OF 4 ATTACHMENT ANGLES (2 ON EITHER SIDE OF LADDER RAIL) TO CONNECT LADDER TO RISER EXTENSION RISER W/ LADDER AND STEPS IF EXTENSION IS REQUIRED RISER W/ LADDER AND STEPS MAINLINE CMP 22/3xY2,5x1,3x1,ETC. NOTE: THIS DRAWING IS INTENDED TOAPPLYTO LADDERS INSTALLED IN RISERS HAVING A DIAMETER OF 30" OR LARGER. DUE TO SPACE CONSTRAINTS AND LIMITED ACCESSIBILITY, THE PRACTICALITY AND SUITABILITY OF UTILIZING RISERS SMALLER THAN 30" DIAMETER AND/OR INCORPORATING LADDERS IN THESE SMALLER DIAMETER RISERS SHOULD BE ADDRESSED BYTHE OWNER AND PROJECT ENGINEER x 3" x y"x 16" LONG AT V-0" SPACING. LONG LEGTO 4 PROJECT OUT. WELD TOP 1'_g" BOTTOM OF 3" LEG TO EACH jANDZS" MAX. CORRUGATION CREST (THESE ANGLES SHOULD BE USED a FOR LARGER DIAMETER a MAINLINES WHERE ADDITIONAL STEPS ARE NEEDED) INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. #4 DIAGONAL TRII ` BAR (TYR.4 PLACES: SEE NOTE i 2" COVER (TYP) II >; OPENING I PROTECTIO SLAB FO ACES STANDARD STANDARD REINFORCING, REINFORCING, SEE TABLE SEE TABLE ROUND OPTION PLAN VIEW NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION AND ACI 350. 2. DESIGN LOAD HS25. 3. EARTH COVER = 1' MAX. 4. CONCRETE STRENGTH =4,000 psi 5. REINFORCING STEEL = ASTM A615,GRADE 60, 5. PROVIDE ADDITIONAL REINFORCING AROUND OPEN INGS EQUAL TO THE BARS INTERRUPTED, HALF EACH SIDE. ADDITIONAL BARS TO BE IN THE SAME PLANE. `NOTE: WHEN RISER EXTENSIONS ARE USED, THE PLANT SHOULD CUT 3" FROM THE SIDE RAILS AS SHOWN '3" FROM BOTTOM OF LADDER RAIL TO RISER JOINT *3" FROM TOP OF LADDER RAIL TO RISER JOINT LADDER RAILS AND RUNGS (2)Y4" FILLET WELDS 1" LONG ATTACH M ENT AN C MINIMUM OF 4 ANGLES P LADDER SECTION, (2 EACH SIDE LADDER) 6' MAX. SPACI VERTICAL 6" FROM RUNGTO RISER JOINT 6" FROM RUNG TO RISER JOINT SECTION A -A RISER LADDER DETAIL NOT TO SCALE RISER NORMALLY CMP WITH 22/3" x Y2" CORRUGATIONS (4)Y6" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELD EACH SIDE) ZYx3"x3/ts" 5)/2" LONG REINFORCING TABLE ""BEARING 0 CMP A BO REINFORCING PRESSURE RISER (PSF) 24 4'0 26 #5 @ 10- OCEW 2,540 4 x4' #5 @ 10- OCEW 1,9C0 30" 4'1 32 #5 @ 10- OCEW 2,260 4'_6" x 4'-1 #5 @ 9" OCEW 1,670 36" 50 36 #5 @ 9" OCEW 2,060 5' x 5' #5 @ 8" OCEW 1,5C0 42' 5'1 44 #5 @ 8" OCEW 1,490 S' T'-6" x 6" #5 @ 8" OCEW 1,370 48' 6'0 50" #5 @ 7" OCEW 1,210 6' x 6 #5 @ 7" OCEW 1,270 ASSUMED SOIL BEARING CAPACIT, SQUARE OPTION PLAN VIEW 7. TRIM OPENING WITH DIAGONAL#4 BARS, EXTEND BARS A MINIMUM OF 12' BEYOND OPENING, BEND BARS AS REQUIRED TO MAINTAIN BAR COVER. 8. PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED BY CONTRACTOR. 9. DETAIL DESIGN BY DELTA ENGINEERS, ARCH FFECTSAND LAND SURVEYORS, ENDWELL, NY. MANHOLE CAP DETAIL (4)%6" FILLET WELDS FROM EACH ANGLE CORRUGATION CREST (2 WELDS EACH SIDE) (4) 43" x 3" x 3/6" 5%2" LONG (2)Y4' FILLETWELDS 1" LONG FROM EACH ANGLE TO LADDER RAIL NOT TO SCALE LADDER RAILS PLAN - - - ----- � A (4)%6" FILLET WELDS - - - FROM EACH ANGLE TO CORRUGATION CREST (2 WELDS EACH SIDE) Z3" x Tax 3y/18" 5Y2" LONG IF_ I ELEVATION LADDER R, AND RUNE SCOTT/R. CT -Or 'Z Lie. No. 035791 i' A 08/27/20 Aj En Z O ZQ OIcau^ U =)_ w 1n a �..� o z W L " Ce W" C:) N N 1\� in Lu m-_ H Lu w O uJ W 2 a to JOB NO. 112066 NOT TO SCALE AS SHOWN SHEET NO. 13 DETENTION BASIN'SWM T CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS: 1. THE DETENTION BASIN SHALL HAVE A TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONALAND IS NOT REQUIRED. 2. THE PROPOSED INTERIOR SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 4:1 TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES SHALL BE GRADED AT A MINIMUM OF 0.50%TO PROVIDE POSITIVE DRAINAGE AT ALL TIMES TO THE RISER STRUCTURE. 3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE. 4. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS TO ENSURE STABILITY THE DENSITY OF THESE COMPACTED SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND THEREFORE MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. 5. EXTRA MULCHING AROUND THE BASE OFTREESAND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTUREAND SUPPRESSING WEEDS. 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHT TO THE ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY. 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION). 6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INFORMATION. 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN. 9. ALL PLANT MATERIAL UNLESS OTHERWISE SPECIFIED SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY VIGOROUS AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. 11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE INSPECTOR INITIALLY, AND THEN THE DESIGNER. 13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. 14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOTSTOCK. 16. THE CONTRACTOR SHALL MAINTAIN A ONE 1 CALENDAR YEAR 90%CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR's CONTROL. FACILITY CONSTRUCTION 1. THE DETENTION BASIN MAY SERVE AS A SEDIMENT BASIN AND/OR TRAP DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION FACILITY IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN. 2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE FACILITY IS COMPLETELY STABILIZED. IF THE SITE OF THE PROPOSED SWM FACILITY WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. 5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE. 7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESC PHASE TO ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION. 8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8-TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS WITH APPROPRIATE EQUIPMENT. THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED IN TABLE 14.4 BELOW: Table 14.4. Clay Liner Specmranons ProDerty Test Method Unit Specification Penneability ASTM D-2434 Cm/sec 1 x 10 Plastidty Index of Clay ASTM D.423/424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clay Particles Passing ASTM D-422 % Not less than 30 Clay Compaction ASTM D-2216 % 95% of standard proctor density source: Virginia Stormwater Management HanadooK (1999) 9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. CONTRACTOR SHALLTHEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALLTHEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 13. THE CONTRACTOR SHALLTHEN INSTALLTHE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN. 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS, IF APPLICABLE, FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 5. INSPECT BASIN OUTFALL CHANNEL, IF APPLICABLE, FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc. 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES. 8. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING. 10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICALTO ENSURE THE BASIN(s) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR WITH THE ENGINEER AND INSPECTOR DURING THE FOLLOWING STAGES OF THE DETENTION BASIN's CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS) 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) 5. INSTALLATION OF THE EMBANKMENT THE RISER PRIMARY SPILLWAY AND THE OUTLET STRUCTURE s . 6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE) 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) e I /2' zinc plated hook attached with 2/8' fastener ® ®® 2-1/8" die. holes Isometric 1/4" HDPE plate (optional) pips - Y. rat plastic will " 2-1/HDPF holes O 2-1/B- holes and 1/4' plate OO manufaclurcd by Plastic Solullana Inc. or equal 000 0000 , 4 • .Hawn IdN optioned Plate 4.^ r 5P .;�'.- din I HnPF stnmlaral pkiallr with 2-I/B" holes and 1/4' plate CCLION manufactured by PlaaUe Solution. Inc. or equal ij n' dia M1°Ic. 0 0 o O o atifi0 e BNP Ele VHLion or orifice fl PLASTIC p o. pox sae DEBRIS CAGE SOLUTIONS *,ne essr U U1104 INC. e77-B77-5727 an plelli-mluinrnm EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE'S SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DIED APPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING &THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF I CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPARED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. SECTION A-9: TYPICAL GRAPHICAI. DETAILS �Homogemous fill min �� o t aft trench-M�below s�table I l Sail ar rak L-----------J TYPICAL HOMOGENEOUS EMBANKMENT Ironsi6on fll ode or gravel -Pipe outlet Course rritsr arm" slo s Perforated collector Foundation drain Bbnket drain FOUNDATION DRAIN BLANKET DRAIN 5vae, ymd a ma aa;, win Rock ar gravel _ Rod I. �sTransib. filler TMnaikion filler CHIMNEY DRAIN TOE DRAIN SofBcr: SCSFsgineennw, Field .11nnunl Figure.. -la. Hoinogeneous frubanknienrs r Seepage Controls 6o5 PROPOSED 8' WIDE TOP OF DAM ELEV=592.27 WITH A i5' WIDE GRASS LINED EMERGENCY SPILLWAY (CREST ELEV=591.10') boo 600 STR : i5 24" RISER 4 TP-591.10 INV OUT: 587.00 TO STR 24 595 595 FRI EBOARD iao-YR PEAK WSE=59z.27 -EXISTING GRADE (TYP.) -PROPOSED GRADE (TYP.) 590 3. Y do-YRPEAK WSE= l.o7 59 590 2-YR PEAK E WSPEAK a-YR PEAK WSE=59o.60 585 585 15" RCP 53-94 LF Qa 2.04% 58o 58o PROPOSED 024" HDPE STANDPIPE (STR. 25) WITH TRASHRACK TO SERVE AS THE RISER STRUCTURE. SEE DETAIL ON THIS SHEET, OR EQUIVALENT, FOR TRASHRACK. RISER RIM ELEV.=590.60. RISER TO HAVE BONE 4" LOW -FLOW ORIFICE (INV.=587.00). RISER INV OUT=587.00 (TO EXISTING DITCH). TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE FOUNDATION THAT IS 6'x6', AND BURIED BELOW GROUND. DETENTION BASIN SECTION PROFILE Storm Rax TM ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOWN DIMENSIONS IN INCHES PLAN SIDE VIEW StorrnRaI Round Series forConerete Manhole 1118111111 WA dine ekRC Mn ID kiln OD RS-24 17 %a 14 Y, 29 24 30 RS-36 21 14 prf 36 43 RS-4k 27 1k S4 . 46 S7 R560 27 K n %a 66yi 60 70 Plastic SOlutlons, Irtc. eugro t FO Bon 43Ea. VM[Aeatu, VA 22M ZM Machos Rd. WlrKhashm. VA Z26M 677) 9774727 p6cra PROJECT. 1540 722.2z19 faa betell.,hl+,dc- oboam.. late elMlerunAl wnam nABrcBalorloe.Rc PROFILE SCALES i"=5' (VERTICAL) s"=5o' (HORIZONTAL) ps i ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTIONS CROSS BRACING FOR OVERHAND HDPEAN71-VORTEXPLATE X DAIS DRAM III river: DETAIL DRAINAGE DESCRIPTIONS STIR. PIPE INFORMATION INLET INFORMATION NO. DA.I (in.) LENGTH (ft.) SLOPE (%) INVERT IN INVERT OUT MATERIAL INLET TYPE Curb Type SLOT LENGTH RIM ELEVATION COMMENTS SWM1 15 17.55 15.95% 665.50 662.70 RCP 4A MHA - - 671.44 VDOT STD. II REQ'D 15 9.10 15.93% 661.89 660.44 RCP 4 MH-1 - - 670.41 j VDOT STD. IS-1 REQ'D SWM 1 MHA - - 670.95 VDOT STD. IS-1 REQ'D 15 1 11.84 4.56% 659.00 658.46 RCP 4 MH-1 - - 670.41 VDOT STD. IS-1 REQ'D 15 65.65 8.73% 652.46 646.73 RCP 3 MHA - - 658.93 VDOT STD. II REQ'D 15 67.47 8.00% 640.73 635.33 RCP 3A MHA - - 644.09 VDOT STD. IS-1 REQ'D 15 61.78 8.00% 629.33 624.39 RCP 3B MHA - - 629.13 VDOT STD. II REQ'D 15 1 60.87 8.00% 616.43 611.56 RCP 3C MH-1 - - 615.79 VDOT STD. IS-1 REQ'D 15 63.92 7.99% 602.99 597.88 RCP 3D MH-1 - - 602.63 VDOT STD. IS-1 REQ'D 15 87.75 3.35% 592.88 589.94 RCP 2 MHA - - 593.69 VDOT STD. IS-1 REQ'D 15 91.28 1.51% 587.62 586.24 RCP 1 MHA - - 591.17 VDOT STD. IS-1 REQ'D 15 1 23.79 1.01% 586.14 1 585.90 RCP OUT 19 18" YARD INLET - - 649.50 8 122.09 643.00 631.69 HDPE 20 12" YARD INLET - - 635.50 8 112.61 626.34 612.83 HDPE 21 12" YARD INLET - - 615.50 8 67.01 1 610.55 602.83 HDPE 22 24" YARD INLET - - 605.50 8 49.71 602.06 597.27 HDPE 23 24" CLEANOUT - - 600.61 8 91.35 595.21 590.59 HDPE 23A 24" CLEANOUT - - 593.43 10 11.82 590.59 590.47 HDPE 25 24" HDPE RISER - - SEE DETAIL - 15 53.94 2.78% 567.00 565.50 RCP 24 i 25 PROPOSED 024" HDPE STANDPIPE (STR. 25) WITH TRASHRACK TO SERVE AS THE RISER 1 STRUCTURE. SEE DETAIL ON THIS SHEET, OR EQUIVALENT, FOR TRASHRACK. RISER RIM ELEV =590.60. RISER TO HAVE ONE 4" LOW -FLOW ORIFICE (INV.-- 587.00). RISER INV OUT=587.00 (TO EXISTING DITCH). TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE / FOUNDATION THAT IS 6'x6', AND BURIED BELOW GROUND. WIDE PROPOSED GRA/�55 LI ED / EMERG E92iCY SPILLWAY WJ 4:I SIDE SLO ES / / AND CREST ELEV.=5 i.i / 8' WIDE TOP.OF DAM ELEV: 592.27 / / / 2 592.27+ 1 / I s0 I DETENTION BASIN DETAIL: SCALE 1"=20' ALBERMARLE COUNTY AS -BUILT CHECKLIST: O SCOTT R. LLINSIZ Lie. No. 035791 S s Ap 10/19/20 \ S96' \ \ � 27 592. ] I S94 S92. m + 27 592. 7 Z W f S90 Z zo J 592. 7 1 j O O U U on LU w � to J it Q � H o a m Z Q FLU ULI a Sn9 U) ii �4 COUNTY OF ALBEMARLE Department of Community Development pr�1a Construction Record Drawings (As -built) for VSMP The following is a list of information required on construction record drawings for stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the construction record drawing be prepared by someone other than the designer. Please do not provide design drawings as construction record drawings. A. A signed and dated professional seal of the preparing engineer or surveyor. B. The name and address of the firm and individual preparing the drawings on the title sheet. C. The constructed location of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the following: 1. Inspection Records and photographs for pipe trenches and bedding, including underdrains. 2. Video Pipe Inspection for any pipes which are not accessible or viewable. 3. Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities. 5. Current physical and topographic surve for all earthen structures. Ponds should include a survey P YY Y of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required for alterations from the design. 6. Plants location and type. f YPe 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s), inlet and outlet protection, alignment and invert elevations compared to design. 8. Computations: For significant deviations from design, provide sealed computations verifying that the as -built condition is equivalent or better than design. 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical sections and linings. 10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage must be within platted easements. Provide copies of recorded documents. 11. Guardrail, fences or other safety provisions - Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied end treatments, compared to design. 12. Material layers - biofilter media, stone layers, sand layers, keyways and cores must be verified as to material types and depths. Include inspection reports, boring or test pit reports and materials certifications. Biofrlter media must be an approved state mix. 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are required to verify fill compaction in dams. 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. 0 W N Q C4 � N W ry W W 2 Z Ul Z Ci) ti C'M C'7 C Y) N 4 C) 1 N (] 0') N N LLJ J J_ U) LU NJ LU U Y W LU LU W LU NH of Q C) C] (N J Q LIJ z L1J LIJ 5� 2 LL LLl I- LL rO V 1 H 0 w a In 112066 AS SHOWN SHEET NO. �4 TH 0 o 'bry \ VARIABLE WIDTH ��° 0 SCOTT R. LINSZ / I / / / Lie. No. 03579111 SWM FACILITY I � I I I / / / / � / '_ ACCESS EASEMENT o 4 DB.PG. _ io/19/zoo I I I I PROPOSED RIPRAP I _ OUT OUTFALL INTO I I I / I ✓/ I I I I I I I I I I \r •. - ----- ROADSIDE DITCH I I I I I I I I I IZ �•.24" cMP \ I I I I I \ I I I /�4 / // I I\\ \ II s zs o I I �� �9 IMPDmASPHALT vEWAY \ \ Lr) VAC�'gSS FORI(z) LOTS V A \ z o \ I \ cli- \\V \\ \A A\ \\ 0 O wLOT 30 m -3744 Ln ac 0.86 ACRES <J nO F-- m \vv�� vv \V v w V II I q // A v vv Lu w I I V v V v v vv vv vv vv vv / A I I I Lu Lu V � 0.0 I\ \ v v v\ \ v v v v\ \ \ I v I II I A I� I 1\ A \ \ \\ \ \\ I vO \I I m/ 0\000 cow a `- s o O 0 CO 0 0 A n n I I \ I I I ID � 00 zo' GRADING o " -zo' GRADING / / \ EASEMENT \ EASEMENT �� \ \ \\ \I \\ I I I I I //II A / \ DB. 3291 PG.607 I \ I_ DB. 3291 PG.607 \ \ \ \ \ / 1 I \ Lu \ II I I I v \ 6sz,CD \ \ I \ \ TMP 90E-7 \ \� r "' V CO / I TMP 90E-9 I \I \ DB/41A3 PAR261\ II I I I \\ w E, a v x <r TMP 90E-8 \ \ wi I 0'CO TRUST LIVING I NIF IGNACIO 0 V A DB 5116 PG 289 TARA L DE I \ \ / / / / l ) / / / / / / 1 • I - / I ARDENAS TMP 90F�92 >a a ti 94 DBC4060 PC 77 I / % / / / / / / / / / NSF A EMARLE OUNTY h w oo _ i l I SERVICE AUTHO TY 0p \ c ,o\ PROPOSED 8" HDPE ROOF DRAIN SYSTEM I I DB 3571 PG 27 4 W/ io' PRIVATE DRAINAGE EASEMENT / / C'7 I I I \ \ PROPOSED 8"HDPE ROOF h I \ B. PG. �_ / REA P 0 ERTY INC,6 D I NOTE: ALL TH UNITS SHALL HAVE ROOF / / / /° /60ro �e o M I 1 \ DDRAIN RAINAGE EMW//ENTPRIVATE 696 z I 6> °� �°� ° 6�0 6g 666 66ti/o i y3 92�PG 3119 I I I DRAIN SYSTEMS THAT WILL COLLECT THE \ / / / h° c� I D `pw o' 9 G6 F DB. PG. I: 6 (o o / % / 1 VARIABLE WIDTH 1 ,9 \ 6g \ / / / r j 6h bh �yv I I I I RUN-OFF AND CHANNEL IT FROM THE ROOFS / / / / v1 SWM FACILITY N N oo ID P TO THE PROPOSED DRAINAGE SYSTEM. M 684 �� I II I \ S58°48'09"E 1 4.92 °48'0TE�485.78'II I i6 I I I I I 31°02iO3" 3.n0' , / / / / �� � � � ="ACCESS EASEMENT • ,... p 1 PF696 94 +iiii i:i+:'i:i is r::+::..::..:... ... .. :.:.•i:': 'i lrrir;'iii: �:::::: ii+}. iir:'ii:� iiii:: r:air.. r:.. i... . \ \ 692-- cw w 13 I 68z .. 3 r saa s ;...... �w -- A ] 3C 3D x N m z � Ego ---- r-- ... --- - __ - --- 36 J N m LOT 90 z \ FE=691.i7 bgb LOT SOT LOT( sal--- 14, LOT -----1 LOT I L©T LOT -LOT - 1° \'0 6r, m' 6rn s- �Ir,,, \ - � ----- LOT �c 5 ;- Q 4 k 3 �c 2 LOT z8 2 1 z6 z4 �3 I--- -------- _ -- \ ` 7 IGAR=�68 1 Lt coi\ i•- �- rn ......... •.. 9 - _ 1 ... ...... GAR=6 � ILu GAR-68y.i7 11 I GAR-680.00 � � AGAR=6 6 6 ] � _ LOT \ I. GAR-6 6.z 1 � - GAR-6 _ 7 � 71 0 � --------- _ - 7 FFE= z FFE=68 .8 I Q IGAR 680.6 FFE=68 .6 11 - goo 1 7 IFFE=6 N/ - \ 6 GAR=6 .i7 4Y/a FZ \ IFFE=68 .83 7 3 I.. 0 7 7 _ 1 7733 J FE=68 _ _ 6 1 IFFE 68z.33 (IFFE-6 o.00ll GAR=6 I �? 0 0' _ `�o - i / 6 / \ ^ 9 -- Ck�\\ 11 GAR- 8 .83 1 I 1 II II FFE=6 733 1 �' N cP `1`co _ •a:: A > L.L FFE=6 50 7.00 j o I zo'DRAINAGE 'y`j TMP 90-31 23A W , 1 II 11 1 i 66 i� - .;:[`.;;� 5.262 AC /\� i 1 / °O .\.. `^ \ O h T -- - I ( - 6 PROPOSEDSTORM ` o _ _ ESMT / i� / • I Vl rt h N I LOT U p o I \ OUTFALL PIPE o_-- DB.PG. 229,211 SF f s W `J 0 �< -�--I 0 1 L__ I I o /. 02 I SWM 2 7 [FE=6R8g ijo 4 1 - a \ - �\-o - - -�. -- I- �° s m +�.� N �M + 4 664 _ 1-1- OPEN SPACE - �. ✓ / F- z _ o _ 04 LO \/ / \ \a \ J I LOT ko: zo'DRAINAGE / - �RI K W \ \ \ \ \ CONCRET J 1 Q 1 AR=687.83 b 1 .. (.� i. ,. .i I\ .� • \. • .i .i , .l r \ I Ir I \ 1 a oA N'�.� j--B FE=688.50 1, 6� 1 '• ESMT �.�. 1. 1 ,+ L .,. SA I I A V VA V A V A \ 22 \ 6o6 A I \ \\ Q 18 1 ITT q DB. \ \ \ LOT 30 I --I co o \� 0. \ 11 \ - VARIABLE \ \ \ V ---- --- - -- - - o -- - co r \ \ \ \ I LOT 2g \ \ \\ \ 6os'I \ \ _ o i DESb.TO VE �' _ DESOTO DR E 6' W' a WIDTH SWM \ \ \�\ 3+45 U �-. -=- --- ---- -- I FACILITY �'� \ \ \ 40,020SE \ \ \/ \ 1\ �\ - _ o.86ACRES a wa o I - FATE /W`--- ACCESS z/ACRE I \ \ \ 0 M \ r- = _ _ __-�� 49 PR]P1iTE 1 _ I 49' PRI O O \ \ I 0 9 \ \ �� \ \ Y LOT AR=68 i \ I , I I; ( ' s.:.. I 1 ' 1 \ \ } I I I I \ \ \/ 610 \. \ \ \ J L. . , ENT \ 9 EASEMENT PG. io' PRIVATE \ ' j \ \ \ W DB. \ z 9 7 7 I DRAINAGE \ \ \ / 6 \ \ \ ~ W i o o O I FE=688.83 t '.�. I f° • . ---- I I � CCNCI$ETf EASEMENT \ \ 6 0 \ o I I A. DB. PG. \ \ 21 I I /\ \ \ \ v i 01Lfi �� m� U I V I I 6 I \ \ LOT _ } T r , - zy , 1 \ 2 Il 10 AR=687.i7 4"(° • ' I'" X.... m I - `'.. I -I _ FE=688.83 - I\ -- 68"k - -- 1 �I�' I I 1 \ 11 1968 / I _ I.I �,. O / GAR: 3.50 l 1 W IGAR- 8 I lC I 9 / / \ / / / 2� I _ 6�6 \ C O N C �TE GAR=6 0o I 1 LLB / J\ FFE=6 5. 7 8 6AR=6 o.z7 - 7 3 GAR=676.i7 w _ (PROPOSED 8" I ---- 12 1 FFE-68 i7 FF 6 o I -I- _ i A \ V LIJ 1 q 1 I 1 GAR=6 5.671 GAR=6 33 1 1 1\ FFE=68 .83,1 I = 9 IFFE=676.83j O .v - 6 A ,HDPE ROOF DRAIN 1 -.:I 1 FFE=6 U IGAR 68i.5o GAR=69.501 1 GA'- .501 -!- d8 \ LOT FFE=6 o 1 - - - _ - _ I _ _/ _ _ - _ _ ` \ I \ SYSTEM / 11 FAR 6 E- 88?87 t I I 1 5. p --. FFE 68z.z 7 FFE-6 a7 1 l 'PRIVATE1 -- 16 1 71 FFLOT1 _I \ _ _ -_-_ ---_� - / - !--.N L'�O N -�- N6�\ \ \ \ U) - J 5 ip _ _ DRAINAGE io A ---- 3 LOT , LOT LOT LOT 6 y LOT LO LT LOT LOT 11 ° ` - - _� N� - o \ \ \ \ V Cn ,� I 13 4 ],5 1 1� 17 i8, 1 1 O ___ _ - - - - - �'� --------�' r+'J_.-�.._ M-.-ram �p �O `°_. RAV I \ I EASEMENT �c------� j 684�1 _ S * 2P ---- _ mIL DB. PG. LOT F as --- -I =__�------1----- $- - N� ° D -- -� I I 0 F- uj 12 A687.83 7% I + 68 _ _ _ _ I �_ , I I10 `b `q FE=688.50 + 6 ------ ---I< �„ /li --- __ -- --- - 1 1 �o. - - s° I - IF IN M01 I I I I I I `o I I ------ -J 686 -- 0 I - -- - - - Q 0-28'-I I \ I I I \ \ \ J ----- -- -- _ - _- ,fi�2_ -6gp -- --= --- - - - --1- ----� ---E---I--- - TP Q - - - --- - - 6ss -- \ - - r--�--� \ I \ \ \ I \ \ go-r \ I I OPEN SPACE I C� F 6 / - -- I I PROPOSED 8" I � O I � HDPE ROOF DRAIN % N5 '18'0 "W 1,07 .99'(T) \ O o m 6� .90 SYSTEM W/ io' � I I I � r I ��� N \ � 86 pi cb S N O 6 N O N N O [O �O .t ry O CO4b .t N O of (p .t .t N O W l0 I - \ I \ \ \ \ PRIVATE 69 �� ro 1 v rn - e o ' 0 0 0 0 o ry �N ry PROPOSED 8" io' DRAINAGE I I / EASEMENT / I / / / / SYS EM HDPE OF DRAIN I I I I ILo' B. PG.DRAINAGE II I I A v v v ESMT TMP 90-30 DB. PG. , / PRIVATE I20' PUBLIC UTILITY / I \ p \NIF GARY D BROOKS JR / / \ / DRAINAGE I I ESMT I I I I / / / / / l / / T1LP/90-30B / I 4858 PC 406 / / EASEMENT DB.PG. I I I I I / / - / / N�F�HaY OR R1JBI11 BROODS �w' DB. PG. / / // D� 1191 Pa 396 / aLn I XISTING MANAGED STEEP SLOPES TO REMAIN / / / % / f TMP �0-3bA I I I I I I I I GRAP�IIC SCA /E / / JOB No. NOTE: ALL PUBLIC WATERLINE /NIF GARY D OR )MYRTLE BROOKS I I I I I I I I l / l L / 112066 I A NOTE: ALL PUBLIC WATER AND SEWER - - / EASEMENTS SHALL BE PLATTED PRIOR / DB 1 P1 PG/ 396 I I I I I 30 0 0 30 60 / 20 -- FACILITIES SHALL BE DEDICATED TO / / / TO FINAL SITE PLAN APPROVAL / /\ / / I I I I I / I I / scale I THE ALBERMARLE COUNTY SERVICE I I I AUTHORITY / / / I I I I I I / I I � / / 1 30 / \ I I I I I / ( ]N EET ) / / / / SHEET NO. inch 30 /ft.