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HomeMy WebLinkAboutWPO202000041 Plan - VSMP 2021-03-02GENERAL 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 CHARLOTTESWLLE, 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 APPLICAT70N 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 APPLICATION 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 TMP090FO-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: 10' MINIMUM (LOTS 1-4 & 13-28) 5' MINIMUM (LOTS 5-12) 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 t (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. THIS 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 ADDITI0NAL 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 CREDI IS. AVON PARK II DEVELOPMENT VSMP PLAN (WP0202000041) SCOTTSVILLE DISTRICT ALBEMARLE COUNTY, VIRGINIA N/F JENNIFERIL --tT— I I L CERARDI DB 4757 PC 433 y w �� 04 ? � a 4 F TMP N/F ALBEMARLE COUNTY i SERVICE AUTHORITY w �' DB 3571 PC 272 7-T-V2 - --- LQT II r --~-- LOT LOT LOT 4 3 2 i LgT w 4LOT 0 2 i _ LOT 7 - ---� o a LOT 8 doh am --------- - LOT 20 "a � LOT TT I I � O 10EI i LOT 11 LOT LO 15 LOT 16 13 14 LOT 12 FF IMP 90-30 ��.. N/F CARY D BROOKS JR DB 4858 PC 406 GRAPHIC SCALE IMP 90E-7 IS IMP 90E-9rNITF 90F DB/46�PCR261 T DENNIS OR 9 C/ OR nA v nrnwArna 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 S17E OR WITHIN EXISTING RIGHT-OF-WAY. THERE ARE ALSO EXIS77NG OFFSITE EASEMENTS FOR THE ROADWAY AND U77LITY CONNECTIONS TO THE AVON PARK DEVELOPMENT. 20 IMP 90E-6 N/F DANEIL SHUMATE DB 4091 PC 534 OPEN SPACE AREA B 50,999 SF.*.-..":'---.-'-"..`. ::::...:... I LOT 29 40,020 SF 0.92 ACRES MILL CREEK g VILLAGE @ HOMES III << °` ri �oM C VON PARK SITE 4w b IMP 90-32A N/F ROBERT SPAULS DB 982 PC 365 LOT 39 \� 0.83 ACRES �J \ rmr au N/F JOHN A OR RUBY T BROOKS PC 3 TMP 90-30A DB 1191 PC 96 N/F CARY D OR MYRTLE T BROOKS DB 1191 PC 396 Ll NOTES.• 1) THIS PROPERTY DOES NOT LIE Wl7HIN 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. APPROVED by the Albemarle County Community Development Department Date 03/02/2021 File WP0202000041 VICINITY MAP SCALE: 1" = 2000' 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. 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II II AII AUCETvv\ vv A vv vvyv V v v v v \ / A �Id�; � Z #1 968 �XIS�lIN HOME TO RE�AII� 1 1 \ \ \ \ \ \. \ I I Q \ONCR TE v v A v v\ v v v V A W J lil O m RAVEL 1 r o w y (n ±0.�' WOVEN \ A / I I I I V ' °Lu o o °o 0 mm PLANTER \ v — — FIN MON I x �IP IN MON I � � ° WI2E FENCE OVER v o LINE I I I A v / 0.281 TP A 1 \ I PROPERTY LINE IF v I I A V / I \ \ II \ O > Z V - \ i--i U \\ \V \ 1V A �`Pm G��\ °' ygo/ ��� Co 00 oNo 0 4' 6 n ^ ko � � ° �^ o o o o o 0 0 o N ry rv° �° / �� V \ I/I /��// %.���� — / I F1 'WOVEN WIRE_ / Z / / y / / _ _ / / / T� �o- / / U v TMP 90-30 — r / �o�� o / / Z_ I \ \ \N/F CARY D BROOKS JR -FEN G / / / / +6.3 WOVEN / I 1 I I I / / / l l / 77(P 90-30B D�4BSB Pc 4os ERT / / / / WkRE EEN�CE 0 ER / I � � I / / u/F routs A OR RUBY T BROOKS / l Q I I � I III I I I I f -� �/ / �/. � w _ /PROPERTY �d E I TMP �o-3bA I / / // // l!1 DB 1191 PC 396 ', / // / /N F CAR D OR JMYR�'LE BROKS � \------ /--- / / / // / DB 1P1 Pc/ass I / / A A ul � Z W ,/ Ej // \ // `� W � \ W I AV /' ,/ /' ' / // / / // // // I l ; \ 1 ; , \ \ / I----- — ��_� / / / / / I I 11 j I AV (n I I I I I I I I I I Lu �� Q CD CD MANAGED STEEP LOPES / G /APHIG/ SCA E / /� // JOB No. P / � / 112066 /40 / / /20 / 40 / 6 / / r 160/ SCALE I \ \ - IN E ET ) / SHEET NO. 1 inch 40 �. / / 2 i 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 CONSTRUC7ON 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 CONSTRUC7ON OPERA7ONS 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 WRGINIA 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 PROTECTION 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 UNPROTECTED 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 PROTECT 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 ELEVA77ON 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 DEVCES 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 WTH 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 VEGETATIVE 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 VEGETATION OR OTHER 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 PROVDE 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 OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACIWIES 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 Ibs. - 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 - Crowtwetch ie 20 lbs. 150 lbs. e Use seasonal nurse crop in accordance with seeding dates as stated below: F 1 h through Aril ................ . Annual R February 6t t ou rY 8h 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 Farinville, 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 LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Applirtion pH Test or Ami"Itural Limestone below 4.2 3 tons per are 41 to 5.2 2 tors per acre 5.2 to 6 1 ton per acre TABLE M1-B ACCF.FEABLE TEMPORARY SEEDING r1 MATERIALS -QUILT1 REFERENCE FOR ALL REGIONS R. Pluntine Dates S.ieJ lltnt).rcl Sept. I Feb. 15 50150 Mk 0 Annual R,,., t ml & So. no Cereal lwlnmr) Rye Ise_l� Feb. 16 - Ap_ 30 Annual Ryc6nus 60- 100 0.1I m,."i-nn,nm) Mey I -AM31 German Millet so 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 VR 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-J.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 SITE 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 tunes. 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 lol, unit, building or other portion of the property. 17. Temporary stabilization shall he 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, or May through August to consist of German Millet. Straw mulch is to be applied at 801bs/I OOsf. Altematives 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 10001bs/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% 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 be 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 17-2046.) 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) 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 WILL 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. OTHER 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 VEGETA7ON 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 SMTHE7C FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSMUC77ON 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 WRGINIA 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 ACT1077ES, 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 THE 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 PROTECTIVE 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 FOLLOWNG. TOP SOIL - 2' DEPTH LIME - 2 TONS/ACRE FERTILIZER - 600 LBS/ACRE OF 15-30-15 PURPOSE.• THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO GRADE THE AVON PARK H SITE FOR A RESIDENTIAL DEVELOPMENT. THE TOTAL AREA TO BE DISTURBED WITH THIS PLAN IS 4.47 ACRES. EXISTING SITE CONDITIONS PART OF THIS SITE HAS A WOODS GRASS COMBINATION 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 PORT70N 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 I WITH SOILS DATA INCLUDED WITH THIS NARRATIVE. SEQUENCE OF CONSTRUCTION: PHASE l: 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE-CONSTRUCT70N 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 CONSTRUCT70N 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 CONSTRUCTION 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 CONSTRUCTION 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 DISTURBANCE 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 STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. PHASE ILA: 8. THE FIRST PART OF PHASE ILA 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 PROTECTION 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.- 13.AT 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 OPERATI0NS 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. Ll 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. 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-79e T 1 9 SLOPES. THESE DEEP WELL DRAINED OILS ARE FOUND N BU CLAY e 0 Se 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 STORMWATER 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. iCOTT/R. Cbi.LINSIZ Lic. No. 035791,E 2/5/21 .47J U) Z z O O a HLn ^ w VI o ,,^ H z \ O m / W w Iz �� Ie ro L9 Z id W Ul Z J J 0 TONAL x w w F- f f S w O O p J �: �: U2 > j O O O w f m J J F a LU LU o F m m J U z a a .. w w O Cl-a� w w w to to to w w w W W N_ 174 N 01 M 00 CD 00 r [` CO M 00 N 4 M Nt N O N (N > LU J_ U) W F- F- O = U 1 Y w F- U) W 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 0Y F- O U z LU 0 L .[ U) t6 z O UO LU U I- � LU w U) a JOB NO. 112066 @� SCALE AS NOTED SHEET NO. 3 Paved construction entrance for erasion control plans 1992 3.05 1992 3.05 1992 3.07 ,TH 0 E S C PROFFERS CONSTRUCTION OF A SILT FENCE CONSTRUCTION OF A SILT FENCE GRAVEL CURB INLET SEDIMENT CONSTRUCTION 7O MIN' (WITH WIRE SUPPORT) (WITHOUT WIRE SUPPORT) ` Z 4) EROSION AND SEDIMENT CONTROL AccEss ,- SW-zA ASPHALT TOP FILTER SCOTT R. LLINS Z COURSE 1. SET POSTS AND EXCAVATE A 4-X4- 2. STAPLE WIRE FENCING TO THE POSTS, 1. SET THE STAKES. 2. EXCAVATE A CX C TRENCH 0 EXISTING TRENCH UPSLOPE ALONG THE UNE UPSLOPE ALONG THE LINE OF U Lic. No. 035791 a The Owner shall provide additional erosion and sediment control measures beyond the standard regulatory PAVEMENT z 6- ��� OF POSTS. STAKES requirements stated in the Virginia Erosion and Sediment Control Handbook (VESCH) applicable on the date _ 6'MAX. `� 2/5/21 �4Q of approval of this Proffer Statement. These additional measures shall consist of the following: N M . 2+A AGGREGATE BASE � a) Silt Fencing (VESCH Standard 3.05): L i) Contributing drainage area to non -wire reinforced silt fence shall be reduced from one quarter (0.25) � ` IIII , II acre per 100 feet of silt fence length to two -tenths (.20) per 100 feet of silt fence. Contributing drainage STONE 70' MIN. _ I I� Flo■ "ONST4JL'IU\ ASPHALT PAVED \ area to wire reinforced silt fence shall not exceed one quarter acre per 100 feet of silt fence; and A A WASNRACK ii) Maximum contributing drainage area to non -wire reinforced silt fence from minor swales or ditch lines 4 / T EXISTING � / 3. STAPLE FILTER MATERIAL 9. BACKFILL AND COMPACT shall be reduced from 1 acre and no greater than 1 cfs to 0.9 acre and no greater than .08 cfs. Maximum 24 2R PAVEWNI� FLOW III - III 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 2% T z' MRN.- 4 IT INTO THE TRENCH. and no greater than 1 cfs; and 1 GRAVEL FILTERr 3. ATTACH THE FILTER FABRIC TO THE WIRE 4. BACKRLL AND COMPACT THE RUNOFF WATER WIRE MESH iii) The height of any silt fence shall be a minimum of 24 inches above the original ground surface and POSITIVE DRAVNAGE FENCE AND EXTEND IT INTO THE TRENCH. EXCAVATED SOIL. j j FILTERED WATER *MUST EXTEND FULL aTDTH I---•O TO SEDIMENT �.� _ DO DO shall not exceed 34 inches above ground elevation; and OF INGRESS AND EGRESS I- ~ TRAPPING DEVICE - - OPERATION IIII j� _ IIII aA � � Q iv) Post spacing for nor -wire -reinforced Rilt fence Rhall be. reduced from a maximum 6 feet apart to a rnaxinium 5 feet apart. Post spacing for wire reinforced silt fence shall be reduced from a maximum U w FLOI 0 0 0 10 feet apart to a maximum 8 feet apart - _ - - II m®R _ A }} / =III a o e p O J F H Ln -tz' MtN.--�{PpslrroE t1RAINACE ��- IIII �_�':. IIII P b) Temporary Diversion Dike (VESCH Standard 3.09): za I SHEET FLOW INSTALLATION sEDIMENr ���II o CL - > > o _ 1RAPPING DEVICE / _ / / \ (PERSPECTIVE VIEW) -- a R O d O O I) The maximum allowable drainage area w a temporary diversion dike shall be [educed from Eve (5) w / FLOW / I �- I coNCRE E CURER s �..� � m of o acres to three (3) acres. III A I A CURB INLET `A z Q � Q rILTER 0.0TH I" ' V/ SECTION A -A =III I t B I ��\ _ �..� o � m m U C) Temporary Sediment Trap (VESCH Standard 3.13): EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. _ _ - FLOW _ _ _ SPECIFIC APPLICATION > - Z _1 _1 ? A IIWIIIIMaII N'ele lap Of 1 sic 11IIIIL'1 t1r al:IaOc\I \9111 a IIW Wlllall I YI[II l+alhock of of o i) Maximum total contributing drainage area shall be reduced from three (3) acres to two (2) acres; and shun Off I.aha Nupplyaw a waA$ hose Milli a dcoudN of 1 ` mL he: lot adeyl tale ;ER FABRIC �� � THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS W � Wig.. a a L OIL�Ia1N p1eKNlB@. \l'ANII M'a1N IIIIL<I be Lallled all;T}' h011l the Nth 0111e lD all IIIIMIMI WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE W Ln 11 The storage volume requirement shall be increased b a fW:mr of 1.2. aplM ot'ed .ettlllis area ID Ieuot a .:eduuetlt .-W HeAWllell sllUl he lFI eL'e1tNl h0111 INCONVEMENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED on g eq yWIRE POINTS A SHOULD BE HIGHER THAN POINT B. AREAS. > > elte um stoop ch atus. ditches of watocotnses. DRAINAGEWAY INSTALLATION w w d) Temporary Sediment Basin (VESCH Standard 3.I4): - - (FRONT ELEVATION) GRAVEL SHALL BE VDOT p3, Ra57 OR 5 COARSE AGGREGATE. K of PAVED WASH RACK Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment i) A temporary sediment basin shall be provided where the total contributing drainage area exceeds two Source: Adapted from Installation Straw and Fabric Filter Control Sherwood and Wyant Plate 3.05-1 Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-2 Source: Va. DSWC Plate 3.07-6 (2) acres; and 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 SILT FENCE CULVERT INLET PIPE OUTLET CONDITIONS TYPICAL ORIENTATION OF FENCING AND ARMORING PROTECTION A A TREATMENT - > CUT/FILL QUANTITIES: ENONALL (SOIL STABILIZATION BLANKET) O N O H ,,II , - SHALLOW UJ f\ \ t� N S•-0------------ SLOPE ~ I. C, M \ VOLUME OF CUT FOR LIMITS OF DISTURBANCE: 11,240 CU. YARD ___ _ ___ ____ do CDrj N _________ ____LT___T �_________ _ -___ WOli $BlLLOtl' SLOPES, STRIPS OF .-H 00 VOLUME OF FILL FOR LIMITS OF DISTURBANCE: 3,16o CU. YARD 3 NETTING PROTECTIVE COVERINGS OFF UK I PIPE OUTLET TO FIAT NET VOLUME OF CUT FOR LIMITS OF DISTURBANCE: 8,o8o CU. YARD TOE OF FILL - CULVERT AREA WITH NO DEFINED MAY BE APPLIED ACROSS CHANNEL ' PLAN VIEW 6" OF TOPSOIL SHALL BE HAULED OFFSITE TO A PERMITTED (SWPPP) SITE I I -11 THE REMAINDER OF SURPLUS CUT WILL BE SPREAD WITHIN THE LIMITS OF DISTURBANCE IN THE - I L BERM FENCE EXISTING SINGLE FAMILY LOTS TO HELP CREATE MORE MODERATE SLOPES. I a BRITHERE IS A BERM NG THE AH P OF TSLOPE. THE MATERIAL OVER THE BERMAND ANCHOR IT / AS EXPLAINED IN EACH PHASE NARRATIVE AND REITERATED HERE, PERMANENT OR° X BEHIND THE BERM. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS ` - - AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TOE DF--F-L-L SECTION A -A FILTER CLOTH KEY IN B--B-: RECOMMENDED MR E� PERIMETER STEEP I Cr) 00 tvy STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE BOARD FENCE go /IN SOMEONE � SILT FENCE PR ;� SLOPES, APPLY N AT FINAL GRADE BUT WILL REMAIN DORMANT UNDISTURBED FOR LONGER THAN O DAYS. DISTANCE IS B' MINIMUM IF ROW A TO THE DI COVERING FLOW CORD FENCE (UNDISTURBED) 3 IS TOWARD pABMJ(MENT TO THE HIDR SEC RE FLOW 3d (MIN.) '� AVO ANCHOR SECURELY. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR FLOW A o PIASTC FENCE CIO MORE THAN ONE YEAR. * * d ! CORRECT METHODS OF TREE FENCING OPTIONAL STONE COMBINATION 6°--------- N PIPE OUTLET TO WELL O NamDEFINED CHANNEL 4 I I �� A-A� 1 BRING MATERIAL THE DOWN TO A LEVEL AREA BEFORE - III J I VJ 1.5' PLAN VIEW TERMINATING THE APPLE AT It NRN THE END t \ I N I I�UNDER 4' AND STAPLE AT 1Y INTERVALS. ''jj N (f) L a - W 04 J FLOW ti' DITCH Flow _ \ <Lr d IN DTCHES, APPLY PROTECTIVE COVERING /� Q LU PARNIEL TO THE DIRECTON OF FLOW. J SECTION A -A USE CHECK SLOTS AS REQUIRED. AVOID Q PMTER CLOTH KEY IN 6-B'. RECOMMENDED FOR ENTIRE PERWETER THE DITCH IF MATERIAL ALL POSSIBIN THE LE. OF F/ ��M� HMO J /'� NOTES: 1. APRON LINING MAY BE RIPRAP. GROUTED RIPRAP. GABION yM J J CLASS I RPRAP BASKET, OR CONCRETE. VDOT 03, #357 OR /5 COARSE AGGREGATE 2. L m IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED go CORRECT TRUNK ARMORING � > � p TO REPLACE SILT FENCE IN - HORSESHOE - WHEN USING PLATES 3.18-0 AND 3.18-4. R/ NIGH VELOCITY OF FLOW IS EXPECTED 3, d - 1.5 MILES THE IA MAXIMUM STONE DMETER. BUT NOT IEss THAN B INCHM TRIANGULAR BOARD FENCE w (n Source: Adapted from VDOT Standard z � O 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 L9 O U 1992 3.01 1992 3.07 TEMPORARY DIVERSION DIKE 1992 3.14 z Q 1-1 LU 1.­1 LU SAFETY FENCE SILT FENCE DROP INLET EXAMPLE PLAN VIEWS OF U son 0�■ 2 % V000 FRANC PROTECTION Compacted Soil BAFFLE SEDIMENTgTIONS BASINS N Y < 0 Q.I. ■I.■ ORS [INLET w / A now ■.. WITH GRATE Non non T V I..L Pp D06 ENE ■EN 0 FRAME 18" min. D 2 NO SCALE Non on Ls• INJL -Flow I -AIIII �'. � I INFLOW Ul cn z \1 ��` y RISER \OO 3• MAT. _ �_ D/z v I L = TOTAL DISTANCE FROM w F 4.5' min. N NORMAL Poo I I l I I THDE OF INFLOW z < 0 GATHER AROUND THE BAFFLE TO EXCESS AT ORNERS . \ THE RISER. LU /FFYY U NORMAL POOL - U) PERSPECTIVE VIEWS �� 0/2 L RISER LIJ STAKE PERSPECTIVE VIEW I I Q FABRIC r f w NORMAL POOL RISEN NROW () O () n ps N BAFFLE ° A ELEVATION OF STAKE AND �� �L. L2 ° r. FABRIC ORIENTATION DETAIL A ei L L1 ♦ L2 61J INFLOW I- lei SPECIFIC APPLICATION SHEETS OF 4' X B' X 1/r EXTERIOR K ^ W iTI Un gym. PLYWOOD OR EQUIVALENT a THIS METHOD OF INLET PROTECTION IS APPLICABLE WHERE THE Cr _ INLET DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER RISER CREST EwvAnoN a 6 �"•�` '"�` 'm"" THAN 57 WHERE THE INLET SHEET OR OVERLAND FLOWS I i i i 5' MIN. ) (NOT JOB NO. EXCEEDING 1 C.F-S.) ARE TYPICAL. THE METHOD SHALL NOT i i °' PERSPECTIVE VIEW PERSPECTIVE VIEW APPLY TO INLETS RECEIVING CONCENTRATED FLOWS, SUCH AS i i i i i Oa S RIOUND. SET A` 112066 PLASTIC FENCE METAL FENCE IN STREET OR HIGHWAY MEDIANS. LEAS 3' INTO THE GROUND E' SCALE AS NOTED Source: Adapted from Conwed Plastics and Plate 3.01-1 Source: N.C. Erosion and Sediment Control VDOT Road and Bride Standards Planning and Design ManuaL 1988 Plate 3.07-1 SHEET NO. � B Source: USDA-SCS Plate 3.14-6 4 11ROIN/A EROSION 17 SEDIMENT CON EROSION CONTROL * HANDBOOK SPECIFICA77ON NUMBER 7R0L NOTE: SLO ES GREATER THq N 3',1 SHALL AE PLANTEI�I / / / I I I OOoSCOCSlARPEFD ��CR � / WITH NAT VE STEEP SLOPE Mix ��dp0Fi SIGNHAL OIH 'ANNUAL SAFETY FENCE 3.01 RYEGASS BY ERNONREED§AA1RATE�'I/ OF 60LBS PER R �U LESS__ PER00 CONSTRUCTION ON ENTRANCE 3.02 SPECIFIED OTHERWISE. °bSAF �hry 4) TP SCOTT R. EF�CL 1IFN �S4GE"X 035791,CONSTRUCTION ROAD STABILIZATION 3.03 RAP\ CD Lie. No.NOTE: M ASU LS INTENDED2/5/21IW TSALOOCTEbASAFIRSTSEDM NSTR � SILT FENCE 3.05 STEP ANY LAND Q4STURBANCE ACTIVITY \ILL BE MADE FUNCTIONAL BEFORE STORM GRAIN INLET PROTECTION 3.07 CPSLOP LAND C STUBANCETAfES PLACE. TEMPORARY DIVERSION DIKE J. TYPE D % TEMPORARY ROW DIVERSION 3.11 / I I I I I I ' I I I I I I I �,ru �-- — I \ \ 24 CMP \ I I I I I I I I \ ST SEDIMENT TRAP 3.13 I I' I I I �/, v� �� I CIP I I I I l 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 I \ V) Ln RR RIPRAP 3.19 I ( I I I I I A\ A\ \\\ \ I I I A f CONCRETE WASH \\ I I \ IA O O p CD �� UTILITY STREAM CROSING 3.25 i I I OUTAREA I \ \ 4/� z o F- �oo0 cc TS TS TEMPORARY SEEDING 3.31 / / \ \ \ I \ \ , \ \ \ \ \ cr U ? J J F %I PS PS PERMANENT SEEDING 3.32 I Z < w w EXISTING GRAVEL ROAD TO SERVE AS CONSTRUCTION 'I` \ \ H O m m z MU MU MULCHING 3.35 \ I I WASH RAC \ \ I m z Q Q I I \ / SITE ACCESS ROAD \ \ \ \ > w I W n aa� M TREE PROTECTION 3.38 T \ DD A NO E: T IS CONS1 1 ION EN R NCE S ALL BE I q�/ w w 6�ff.� INSTALLED, OPERATED, AND MAINTAINED BY THE Ln Ln DC DC DUST CONTROL 3.39 I I I I I I \ _ \ \ \ \ \ \ \ \ \ CE i2'x7o' MIN. CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I I I w w \ \ \ \ \ SOIL TYPE \ \ \' \ \ AREA SHALL UTILIZE T IS C NSA R C ION ENTRA \ E. I s s BM SOIL STABILlZA7/ON BLANKET 3.36 I I I \ \ \ 72\ \ \ \ PROPOSED SAFETY FENCE 1 \ \ I I \ FINAL LANDSCAPE BUFFER AREA TO BE I I ) I \ \ \ 1 AROUNDSEDIMENT TRAP I • \ o _ \ PLANTED AS SOON AS CLEARING AND SCRIM�FENCE TO BE INSTALLED GRADING OF 774E AREA IS COMPLETE HEN CLEARING 00 00 00 I I I o \ PER PR FER to / \ \0 co EXISTING SOIL TYPE BOUNDARY \ CONTRACTOR STAGING AREA I AND GRADING OF ITS LOCATION \ � � � � A Q � � � � � I I HAS COMP ETED I I WITH FUELING TANK, DUMPSTER,o O". a'l, ^ I \ I \ V I I \ I � 100AND PORTA-POTTIES I rn I n \\ \ \ I NOTE: POST SPACING SHALL BE A I I I I I \ w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I / SUPPORT SHALL BE AT LEAST 24INCHES / I I \ V j o 0 0 I L I \ \ BUT NO GREATER THAN 34 a C VDOT D BARRICADE \ INCHES. \ I o 00 o N I I x \ \ -69z X \ I \ \ 1 I SCRIM ENCETO BE INSTALLED 94' (PER PR FFER igg HEN CLEARING ♦ / / Lu \ / / AND GR DINCfOF ITS LOCATION xHAS I r _ „ I HA C M LETED ,v M I I I \ ♦ DID 0 ry / / m PROPOSED SAFETY FENCE I �6°�' 60� ry o qo \ \ \ \ G 0 m 69G 1 \ \ 6)8 1 ia� 69° y8� y6' 664 66ti 60 I I e I I D AROUND SEDIMENT BASIN I \ / / / / / ° o° h� SAF \h O) \ a 9 ,g6, \ - TP 6 rah �� h� / oo I I ° a, ESC PHASE I TEMP. 15" CMP BARREL (49.7 LF Ca1 i.o%, / / C.�\ N I \ \ S 682 \, I b b�^ I 1 I \ I d� \ 11=63o.z5, 10=6z9.75) WITH VDOT CL. AI STONE 1 1 .Sg4 I I tO I OUTLET PROTECTION (L=zo', W1=3 75' W z=5 z5', D=z') / / / // r / � 0 '03" 3� 0' Z y Q + + + + rrr rr r rr ter' J + + + + + . . . T T + + I pS I _ I I Db i / N O LI + i I DA TO SY 2 0.7 A m S TYPE I \ � A++ z04 � � � \ 1 � I I -� i I ' I ♦ � � I I I I I I�� I I I ?, Q � ��I W, z� �' 1 Q 1__ \ / \ \ \ I MU 1 \ I I U h 1 I \ I I _I _ _ _ W Z 30 \ V A / \ 1 1 \ I I I DATO 61=z� O .g6A + D / � I \ \ \ 90-31> \'�TMP Ts 5.262 AC \\ \ ,� / I I U) \ \ I I 1 I I \ A I 229,211 SF N\ \ � 1 I I \\ 1 i I \ \ \ \ w Z \ % e1 W 1 D 1 '® c \ \ \ N RETE WA H CC TS I - \ CO C S 1 U G \ \ \ \ \ I I I I I LRh io'WIDE\ \ \ \ \ \ \ \ \ I OUTAREA 1 J 1 0 \ �I ♦ DC I I A TOP OF DAM \ \ \ 1 � I� \ \ I — \ \ i \ \ o. AC W DA TO SF - \ I I \ ♦ 1 Q \ v v \ \11 U I I I \ 1.i \ \ i / W S \ OIL T � A I 1 YPE \ ♦ TS i EXISTING GRAVEL ROAD I BM — \ I \ iB \ \ 7 I FLOW DIRECTION \ I � / TO SERVE AS CONSTRUCTION Z I ♦ \ o \ / ♦ I I ARROW (TYP.) \ I I I \ \ \ \ SITE ACCESS ROAD W O NOTE: POST SPACING SHALL BE \ w/WI\ V A ♦ DRAINAGE DIVIDE (TYPJ I SF RE MAXIMUM OF 8 FEET. HEIGHT ♦ - I I �I I SUPPORT SHALL BE AT LEAST 24INCHES I \ \ \ \ ♦ I I ION ;I� WD xI (SI I I IBUT NOG GREATE R \ \ O I \ ♦ MU I 34\ z FLOW DIRECTGRAVEL CONSTRUCTION INCHES. iL I SUPPORTw/WIR ARROW(TYPJ ITE ACCESS ROAD \S IL TYPESF \ Jz Z W Q EXISTING SOIL NOTE: POST SPACING SHALL BE A ♦ I ` (� \ / I I ' \ \ \ \ MAXIMUM OF 8 FEET. HEIGHT ♦ TYPE BOUNDARY W I SHALL BE AT LEAST 24INCHE5 1 }� (� I BUT NO GREATER THAN 34 W I \ % \ '/. \ % '/ %I 1✓>- ' XISTING SOIL TYPE BOUNDARY Q E I I INCH S I I \ \ \ 1 / / PROPOSEDTEMPORARY / I I — ' f' N �o \� o o W BY SILT F DE I I I I I 0 O I - 1 I STOCKPILE SURROU 699 I FENCE ' ' ��� \ II I I \ \ I \ \ I \ SF w/WI j Q =__ ____ _ _ __ _�__ I \ / I I I I \ SUPP Ur \ I w 86 8 ° b N ° 0 6 ry o ou -• N o 00 ry o w � ry o m 0 b a a ry o 00 � 69 `b 0o 00 n LD � � `0 `fl ^ m m m m n• ry ry ry N \ \ ro k0 L0 / �0 �0 w L0 Lo �0 �0 �0 W ro <0 W to to \ SAF PROPOSEDLIMITS I I I f' I A44 RE NOTE: DRIVEWAY A Ct55 TU / OF DISTURBANCE (TYPJ I DID NOTE: POSTIOVE DRAINAGE ALONG AVON ST EXT SHALL BE / \ DIVERSION DIKE / MAINTAINED AT ALL TIMES FOR / \ F I / CURRENT RESIDENT OF EXISTING / / / \ SINGLE FAMILY HOME. DURING _ NOTE: SILT FENCE, SAFETY FENCE, AND / o TREE PROTECTION SHALL BE INSTALLED CONSTRUCTION CONTRACTOR AT LIMITS OF DISTURBANCE. THESE ARE SHALL PROVIDE ALTERNATE / GhAPH/IC S ALE / / / JOB NO. TEMPORARY ACCESS FOR FFSET FOR GRAPHICAL PURPOSES. I 30 0 /is / ao eo izo 112066 RESIDENTASNE DED DRAINAGE DIVIDES ARE MEASURED AT THE / SCALE DIKES OF DISTURBANCE OR DIVERSION / / I I I I I J i I III= 301 I I / i / j / I i ( IN FEE SHEET NO. ) / 1 i ch = ft. T 5 EROSION CONTROL * 11ROIN/A EROSION 17 SEDIMENT CONTROL HANDBOOK SPECIFICA77ON NUMBER SA �yTH O SAFETY FENCE 3.01 CE CONSTRUCTION ENTRANCE 3.02 I I I I O o° h° SAF 0 m m o O I I I I I I I BUILT STR--i �h h h TP h� SCOTT R. LINS� E CR CR CONSTRUCTION ROAD STABILIZATION 3.03 I �� I I I PHASE / / I CD Lie. No. 035791,E \ I I III I I SF A� SILT FENCE 3.05 // I I I I I I I I I I I I pow 2/5/21 IONAL E�O� lP STORM DRAIN INLET PROTECTION 3.07 I I I / D OD �� TEMPORARY DIVERSION DIKE 3.09 �� TEMPORARY ROW DIVERSION J. I I III ' I I f� I — f I I I I I 24" CVP I I I I ST SEDIMENT TRAP 3.13 // / / I I I I I I I / I I 1 I I I % v� v CIP I I I I I SB SEDIMENT BASIN J. O 61D� OP OUTLET PROTECTION 3.18 ` \ I \ 0 DAM \ \ \ I I I I \ F- F- x RR RIPRAP 3.19 A \ I I o O I I I I Il I \ \ \ \\\ I I \ O O / / I CONCRETE WASH y� \ u u CD �� UTILITY STREAM CROSING 3.25 \ / I I I / I \ OUTAREA x \\ \ 1 \ Z zo J In ¢ z z ¢ a Koo� TS TS TEMPORARY SEEDING 3.31 \� I \ \ \ \ v v w _ C)- m w w x / I \_ , 1 \ Cn 7 J J W / \ \ \ w In ¢ ¢ PS PS PERMANENT SEEDING J. \ I I I I / / \ I `EXISTING GRAVEL L ROAD �� l I \ \ \ H z < m m / \ SIOSERVE AS TE ACCESS OADTRUCTION \ \ WASH RAC \ \ m z Q Q MU MU MULCHING 3.35 \ I I \ // w h w w O TREE PROTECTION 3.38 I I I I \ Li \ \ NO E: T IS CONLij STRUC 10�1 EN R�NCE 5 ALL BE I n p p w I INSTALLED, OPERATED, AND MAINTAINED BY THE I I Ln Ln DC DC DUST CONTROL 3.39 I \ \ \ \ bD, CE iz'x7o' MIN. \CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS I I w w I I I I I \� I \ \ \ \ \ \ \ AREA SHALL UTILIZE T IS C NST R C ION ENTRANCE I I s s BM SOIL STABILIZATION BLANKET 3.36 \ IWC100 FINAL LANDSCAPE BUFFER AREA TO BE I I PROPOSED SAFETY FENCE PLANTED AS SOON AS CLEARING AND ( I o / \ \ \ \ AROUND SEDIMENT TRAP GRADING OF 774E AREA IS COMPLETE LOCAT�QN OF SC IM FENCE 0° O Co I ID INSTALLED PER P OFFER 20 IN I I \ V y'^ �r 5 I ✓ CONTRACTOR STAGING AREA \ Q WITH FUELING TANK, DUMPSTER,, Ln I \ AI I I I N o 0 0 o AND PORTA-POTTIES / \ O I N \\ \ \ \ \ i0 `D I \ / I I I \ I w\ I NOTE: POST SPACING SHALL BE A I I SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I I / \ / \ \ SUPPORT SHALL BEAT LEAST 24INCHES I CDX X \ \\ BUT NO GREATER THAN 34 I I r C CD M1-4 INCHES. I o o N I I VID BARINCHES._ I I I ILOCA ON OF SC M / / ♦ / / / L9 I I 94 1 'FENCE I STALLED PER / / ♦ / \ x 1 I I PROFFE io .IN PHASE I I \ -� DD j v INESCPRASEIIA,THE ONTRA TORSH LLEXTENDTHE 6oro ry M I 1 I m \ W D \ , \ \ E 1 I 690 g / / I I e I I ESC PHASE I BARREL TO PERMANENT STIR. 3B VIA THE USE �O � �Oo �� M \ sy 1 CRS \ �g o 0 0 6 y6 k �\ v I N h \ TP 6 1 O FOOT LON ) I to I I �^ I OF ATEM PORARY BEND. CONTRACTOR SHALL EITHER TIE PERMANENT STR-3A TO STR-2 & STR--1 ( SAF h I co- 9 y 6\ 6 66 3 G AN ao I 'D p INTO STR.3B AT ITS PERMANENT PIPE OPENING (11=624.3g'), TO STR-OUT ARE TO BE BUILT CV \ 1 `An D D k\Ad 6 1 1 1 Gg 682� y 6FOOTHIGHBAFFLES I 1 I D OR TIE INTO AN UPPER TEMPORARY RING THAT CAN BE AS FIRSTPARTOFTHIS PHASE M Z S ' " 1 \ 1 4 I ` 1 REMOVED AT THETIME OF SB #i's REMOVAL&THE ,-�r_/ 31 `OZ O3 3.1C0MPLETION OFT E STORM SEWER CONSTRUCTION. / � Q 1 + + I + + + AA I r r r r r r r r r r m r I U' J 1 \ I I I e �� I I I A TO ST 2-q.7iAC1 I Db m --- N 0 \ I I _- WD \ D TaSF ~ \ 1 \ DRAINAGE DIVIDE (TYP.) \ / I I _ - 5TR.38 ,,1 \ ` I I _ _ 1 r < z 15 �C 1 \ / I DA TO �B z =12.75 �C '639-79 i y W O 1 / CRSz U ---- rr r 11lk,I I TS I 11 DC T 5.262 AC mp 1 DD \\ / I I i � \ 6 y ; I 6' WIDE i0P 0\ DAM z,�9, 211 Sr' \\ \ l � ; w LL] WD T I I �\ A \ 1 : POST SPACING SHALL BE A\ \ \ 1\ I I I I \ E N TE MAXIMUM OF 8 FEET. HEIGHT , CONCRETE WASH 1 Q hI 3 CRS _ _ C SF / � � OUT AREA 1 � 1 \ \ \ I 1 \ U I I I I I — \ SUPPORT SHALL BE AT LEAST 24 INCHES \ �\ \ 1 1--II \ I MU BUT NO GREATER THAN 34 Q \ \ \ 1—I uj 1 �— � I I \ RV AINCHE \ VA� 1 FLOWDIRECTI N POPOSED SAFETY FENCE I 1 \ I ARROW (TY .) I I I I BM AROUND SEDIMENT BASIN \ \ \ \ `EXISTING GRAVEL ROAD Y z 1 l I I I \ TO SERVE AS CONSTRUCTION 4o FOOT LONG AND \ SITE ACCESS ROAD W < O 6 FOOT ,HIGH BAFFLES I '00�1 v - / II I 11 I \� �� ul U z0 1 \ \ \ Qr- C I I I GRAVEL CONSTRUCTION I I \ I \ O u1 I I 1 SF w/WIRRE \ / I I I I I I I SITEACCESS ROAD / / I I I I % \ \ \ \ \ \ \ W / i 1 \ SUPPORT, I I I I;' Q Q I NOTE. POST SPACING SHALL BE A I MAXIMUM OF 8 FEET. HEIGHT SHALL BEAT LEAST 241NCHEs I U) LLI I I I 1 BUT NO GREATER THAN 34 I — 0 a Q � INCHES. PROPOSED TEMPORARY I I I� oL11 STOCKPILE SURROUNDE I I I I I ° O I lr r r r r r r I BY SILT FENCE I ' '' I I \ I O SF w/WI \688 Qn r r r r r r r r r r ♦ I li \ \ SUPP _ V I I I \ I D �04 �6' 6��\ 9O\ ygo �� W W W O 6 ^ N ^ wkr) �o tD i4 0 00 lD � O W 6 It. N O 0 �+'1 M M n Cb (o S `It N �V N W w O I �o �D lD / lD �D �D �D �D lD IO b I \ SA F / PROPOSEDLIMITS \ OF DISTURBANCE (TYPJ NO E: CO TRACTOR TO ENSURE NOTE: DRIVEWAY A CESS T / I I \ \ DID AVON ST EXT SHALL BE POST DIVERSION I ALONG / MAINTAINED AT ALL TIMES FOR DIVERSION [�IKE CURRENT RESIDENT OF EXISTING / / / I w 1 NOTE: SILT FENCE, SAFETY FENCE, AND I I I I SINGLE FAMILY HOME. DURING / / _ TREE PROTECTION SHALL BE INSTALLED / I I I / CONSTRUCTION CONTRACTOR \ / / AT LIMITS OF DISTURBANCE. THESE ARE / I I I I I SHALL PROVIDE ALTERNATE / G AP 1C SALE / / / JOB NO. OFFSET FOR GRAPHICAL PURPOSES. / / I I TEMPORARY ACCESS FOR I 112066 I _ s DRAINAGE DIVIDES ARE MEASURED ATTHE/ I I I I I I T RESIDEN AS NE DED 30 0 / ie 30 60 / 120 / I / LIMITS OF DISTURBANCE OR DIVERSION SCALE 1'= 30 / DIKE. / / ' IN FEET ) SHEET NO. / / I I 1 inch - 0 ft. I / l 6 EROSION CONTROL * 11ROIN/A EROSION 17 SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER SA �yTH Q SAFETY FENCE 3.01 OCE CONSTRUCTION ENTRANCE 3.02 I I I O o° �� SAF I I I I I I I DID v �� �� TP h� V v v SCOTT R. LINS�X CR CR CONSTRUCTION ROAD STABILIZATON 3.03 I �� I I I I / �, / I I \ Lie. No. 035791 SF � o) SILT FENCE J. / I i I I I I I I I I I I I I p2/5/21 I IONAL It lP(D STORM DRAIN INLET PROTECTION 3.07 I I I I c OD �� TEMPORARY DIVERSION DIKE 3.09 / I I/ / / I I I I I I I I I I \ —► /� m _ — _ — — _ — 1 1 I / I \ -1110�111� TEMPORARY ROW DIVERSION 3.11CMP ST SEDIMENT TRAP 3.13 / / I I I I I / / I I I % ', I II \ \ SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 I I I I �TD V I F- F- L� II \ja F \ V I I \ w w U RR RIPRAP 3.19 \ V I o �� I j;, A V A I \ O O \ / I CONCRETE WASH \ u u v' In o CD �� UTILITY STREAM CROSING 3.25 i I I I I \ \ OUT AREA I �' \ \ z x V \ \ \ O Q z z Q TS TS TEMPORARY SEEDING 3.31 \ i I I I I I I _ A A \ \ V A vL m w w i _ �"♦ Z) ~ �� \�En \ / EXISTING GRAVEL ROAD H PS PS PERMANENT SEEDING 3.32 O SERVE AS CONSTRUCTION ❑❑ r� _ � \ I WASH RAC O m m � \I \ \ \ \ \ \ \ W / m z J J z MU MU MULCHING 3.35 I I I I / \ SITE ACCESS ROAD — \ \ \ > TREE PROTECTION 3.38 \ I I I I NO E: T IS CONSTRUC 10�1 EN R�NCE 5 ALL BE w w q�/ O I \ A INSTALLED, OPERATED, AND MAINTAINED BY THE I I I 6�ff.� Ln L DC OC DUST CONTROL 3.39 I I \ ` CE iz'x7o' MIN. \CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS > > w \AREA SHALL UTILIZE T IS \ NS R C ION ENTRANCE I I II s s BM SOIL STABILIZATION BLANKET 3.36 I ° \ \ \ w \ \ \ \ \ \ PROPOSEENCE \ \ I PLANTED FINAL NAS SOON DSCAPE BAS CLEARING ANDUFFER AREA TO L ( I I I I / \ \ \ \ \ \� I N + + + + + GRADING of THE AREA IS COMPLETE �4ROUNDSEDIMENTTRAP o m r OCATION OF S RIM FENCE H m� INSTALLED PER ROFFER zo IN I O \ \ CONTRACTOR STAGING AREA Q � I I \ WITH FUELING TANK, DUMPSTER,o m I \ I I I N o 0 0 0 AND PORTA-POTTIES / \ID ° I N l0 I 0 w \ I NOTE: POST SPACING SHALL BE A I I I I II O \ \ I \ SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I I I \ \ \ \ SUPPORT SHALL BE AT LEAST 24INCHES I X BUT NO GREATER THAN 34lipI I r VDBARRICADE \ I INCHES. I o N I00 I / ILOCA ON OF SCRIM / ♦ / /L9 I I 94 1 FENCE I STALLED PER / ♦ / I' PROFFE 10 -IN PHASE I x I I \ PROPOSED TEMPORARY i6" CMP I I I 1 I I \ WD CONNECTION BETWEEN PERMANENT I ~ I 1 \k\ m \ ��y STIR SA 66D oT o466 ENG SH=33o j �� 6�° g / / / I e I o�606 /O°� ° a°o °q' SAF y � \ A 6y6 \ f 5.5 4.49, 3• y b6y 6ti ��� I I M I N / / DD �� CV l'v o °o �� 1 6�68�� e 6 TP 6 �� G�0 �h �� �) �' \ o FOOT LONG AND \ „ 1 1 1 a —/ / M Z I S 4 O 6 FOOT HIGH BAFFLES \ I �31 °0203" 3.10' 1 \ / / Q =117111r rr it + P + + + + + + + \ I ++ + II + + + } ++ OR + M + + p+ONTRAL, � I p Nr*I 3 CV EMPORAR OM D�RECTIN�RFFRN-DATOST3 o.7AC M p TOS4DIMENIBASI. 04 T JJ D TaSF- Is1� TS T B I \ 1 z TS I _ I r��rr s C 1 D TO SB iI- 2- J 5 1T 7,�AC �F,. -- --- w 11 MU / I MU I I O DC I � � � TMP 90-31 DD ' 5.262 AC zzs,z/ / SF 1 V � � � � \ 1 I /, z \ I I \ \ \\ \ L w �Bi \ 6 .7 A \ \ \ V A \ \ L IP nipI \ \ NOTE: POST SPACING SHALL BE A\ \ I wIWIRE `\ CONCRETE WASH 1 Q SF MAXIMUM OF 8 FEET. HEIGHT / � \ OUT AREA 1 � J � Q — SUPPORT SU 1 - SHALL BE AT LEAST z INCHES I I I I I I I I I I I I I I I � � � � � 4 \ � � 1 � ��Lu 6' WIRE TO X D N BUT NO GREATER THAN 34 \ \ 1 ,� _ (,A \' INCHES. \ / \ U W PROPOSED SAFETY FENCE \ Y TIRO UND SEDIMENT BASIN `EXISTING GR VA EL ROAD ce BM ITT TO SERVE AS CONSTRUCTION Y H I- o FOOT LONG AND _ 0 1 DC _ FLOW DI TtON— � � 4 I �1 � � � � � SITE ACCESS ROAD LLJ 11 W I 6 FOOT HIGH BAFFLES \ \ \ 1 I - I� IP I IP ARROW I O I D I I I \AUiET V \ I \ LIA U) GRAVELICONSTRUCTION \ \ O I /SI E ACCESS ROAD \/ I w \ W MU � � � Q m I I x ,\ MU I MU I / I I \ '/, '/, 1 \ I \ \ \ Cn Lu DC C II PROPOSED EMPORARY — I �N 0 0 0 LLI _ I I STOCKPILES RROUNDE I I I I I I ° O D X B SILT FENCE I I 1 w/WI I I ------ SUPP I I \ I \ I I \ I SF U I I I \ I co �d'6 6�� 9O 4i o ry o 0 6 ry o co �o -t N o co � o co e � N o cb to a a ry o 00 ON ,D `� 69° 00 D � '^ m m m m m ry ry ry N N I �o ko Lo / ko Lo a w W W ko �o w w (o <o �o b �o \I I \I V NOTE: DRIVEWAY ACCESS T AINAGE DIVIDE (TYP.) SAF PROPOSED LIMITS I I I I UPPORT _ — / / DISTURBANCE (TYP.) I DID NO E: CO TRACTOR TO ENSURE MAINTAINED STING SINGLE DAT ALL FAMILY HOME. I ! I I DRAINAGE ALONG / / G NOTE: POST SPACINSHALLBE W/WG SHALL BE A iON IKE I I / / I POSTIDIVEDRSI Q DURING CONSTRUCTION OF / / / / / I I I I MAXIMUM OF 8 FEET. HEIGHT ` / / / / / NOTE. SILT FENCE, SAFETY FENCE, AND I I I ASPHALT DRIVEWAY, / TREE PROTECTION SHALL BE INSTALLED CONTRACTOR SHALL PROVIDE I SHALL BE AT LEAST 24INCHES AT LIMITS OF DISTURBANCE. THESE I I I GAP71C S ALE \ JOB NO. I I BUT NO GREATER THAN 34 _ / / / / / OFFSET FOR GRAPHICAL PURPOSES ARE / / I I I FOR RESIDENT ACCESS I 112066 ALTERNATE I INCHES. I I I ESIDENT ____ _ /- � / DRAINAGE DIVIDES ARE MEASURED AT THE I I I /30 o / is ao so / / 120 --- / /LIMITS OF DISTURBANCE OR DIVERSION � / / I I I I I I / I I � 11 SCALE I I DIKE. / / / / / I I I I I y IN FEET ) SHEET NO. i / / I I I I I I I I71— —1 / 1 inch = 0 ft. I / l I 7 11 EROSION CONTROL * 11ROIN/A EROSION 17 SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER / SA SAFETY FENCE 3.01 TH p� v��r I I / IOCCRE CR CONSTRUCTION ENTRANCE 3.02 I I II I II II I I I11 1I1 III\ ry Co I \ _ O�SCOTT R. LINS�� CONSTRUCTION ROAD STABILIZATION 3.03 _ SAF P \h CD Lie. No. 035791 SF A� SILT FENCE 3.05 / I // I I I I I I I I I I / I I I I / / / / / / / 0 �SSIONAL E��l lP STORM DRAIN INLET PROTECTION 3.07 i TEMPORARY DIVERSION DIKE 3.09 // I I / // I I I I I I 1 1 1 I I \ —► � m __ I I I I\ I I I I I _ �� TEMPORARY ROW DIVERSION 3.11 I I III I I I f� I I I I I 24" -MP I I I IST � SEDIMENT TRAP 3.13 SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 / / I I I I I I / / / 1 ` I ( T \ \ I I I I \ v, v, \ DD FD VA I w w H RR RIPRAP 3.19 \ I I I I Il I \\ \\\ I I I \ p p CONCRETE WASH CD �� UTILITY STREAM CROSING 3.25 \ i I I \ I I I \ OUTAREA I v \ \ \ \ \ Z o t z ¢ z z TS TS TEMPORARY SEEDING 3.31 v m w w = / PS PS PERMANENT SEEDING 3.32 I I I ❑L-j \ \ \ \ \ o o mmz x �cx WASH RAC \ \ MU MU MULCHING 3.35 m z ¢ a \ I I \ \ \ > / \ \ E: T IS CONSTRUC 10�1 EN R NC E 5 ALL BE Lu " 0 0 0 O TREE PROTECTION 3.38 \ I I I I \ 00 NO I I \ \ EXISTING GRAVEL ROAD INSTALLED, OPERATED, AND MAINTAINED BY THE I I I Ln L ODC DC DUST CONTROL 3.39 I \ TO SERVE AS CONSTRUCTION CE iz'x7o' MIN. \CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS w w \ \ \ SITE ACCESS ROAD \ \ \ \ AREA SHALL UTILIZE T IS C N5T R C ION ENTRANCE I I I s s BM SOIL STABILIZATION BLANKET 3.36 I eo I \ \ \ \ \ \ \ I \ / I FINAL LANDSCAPE BUFFER AREA TO BE PROPOSED SAFETY FENCE ( I I I A \ AROUND SEDIMENT TRAP v • \ a n PLANTED AS SOON AS CLEARING AND o � �v q"' conv+ GRADING OF THE AREA IS COMPLETE LOCATI� N OF SC IM FENCE 00 0 CID � INSTALLED PER PROFFER zo IN O ✓ \ CONTRACTOR STAGING AREA Q V 1 WITH FUELING TANK, DUMPSTER0, a'r, 1 I N o 0 0 o AND PORTA-POTTIES \ \ID 00 \ I NOTE: POST SPACING'SHALL BE A I I I I \ I O \ I \ SF w/WIRE MAXIMUM OF 8 FEET. HEIGHT I 1 1 I / \ \ \ SUPPORT SHALL BEAT LEAST 24INCHES I \ c) N \ X \ \ BUT NO GREATER THAN 34 I I r C rn INCHES. I I o o N VD BARRICADE _ I I 692 00 x� X I I \ I ILOCA ON OF SC M / ♦ / / I I 94 FENCE STALLS PER / \ ♦ / � PROFFE io .4N PHASE I WD I I I I \ m ♦^ o �/ /( e O 1 I /O 606 �o� o M 1 G \ 6>g �1 e� 69 6g y6. k / I a I N I / \ / ° a° �° r� m 9 6 1 \ Lv o �k \9 9 \ \ 680- \ / / / TP 66 66ti 3o FOOT L6NG AND m N V 1 6g 6g2 6 FOOT HIGH BAFFLES a 1 `'� \ \ / r / / I / DD SA 1 1 I S31 °02'0311 3.10' 1 \ \ / �/ j �� r / co Q 1 - J + + + r r r rr rr Of mm T + + + + + + + + + + + + + + + + U + pS + + + + + +� - 1 II{i �rtp + + I �0�6T=i.00AC / I D m --- N O IP I \ D Ta SF T - \ 1 � 11 TS - � � O Q z 15 �C \ 1 � I D7 TOi �SB = 2.75 AC I' .�9 1 1 �, A \ \ V J V 30 � TMP 90-31 % ♦I� 1 DC _ A e. e A 1 5.262 AC I i 7� \ I I D I I I6' WIDE TOP OF DAM Lu z \0 \ I I U A Bs 229 1 SF I DD W 1 IP I I \ \ RETE WASH Q — 1 / �S SF WI\NIRE CONC \ / \ OUTAREA 1 w J Q 1 UPPORT S MAXIMUM OF8 FEET. HEIGHTS A LBE I AT LEAST xy INCHES BUT NO GREATER THAN 3406 INCHES. PROPOSED SAFETY FENCE I I BM AROUND SEDIMENT BASIN \ \ \ , z 0 1 _FOOT LONG AND � V 1 \ \ I\ � � � � \ L�J Q 0_ i- I 1 DC IP IP 6 FOOT HIGH BAFFLES \ - GRAVEL CONSTRUCTION \ I o I I -- IP I I SITE ACCESS ROAD I I I I \ \ EXISTING GRAVEL ROAD Z O � 1 I I I WD TO SERVE AS CONSTRUCTION ul O \ 1 P I I I I I m m�= m m m m r 1 SITE ACCESS ROAD \ w LW 1 A IP TS I \ 1 O I TS L1 ' I \ / Q v MU - \ / MU/DgT05=o.35AC\ Cn W DC Q PRO OSEDTEM ORARY w - _'�(� �- 1 1 1 STOCK ILE SURR UNDED I 1 i° `O D N ° ° SIL FENCE go I ( 1 I A SF ISUPPI Q I I I 1 NOTE: DRIVEWAY ACCESS TO - 5 °1 W 07 .99'(T AVON ST EXT SHALL BE CD 1 o I a �66 0 MAINTAINED AT ALL TIMES FOR CD w 04 00 d'6 �\ o o a ry o 0 6 N o 00 a N o co ry o CO e a ry o 00 EXISTING SINGLE FAMILY HOME. p (o a a r o ao w \ II 1 i° \ 69 0� 0 O O O O ° io w w ko W ko ' DURING CONSTRUCTION OF o ry bry ry o A SAF / PROPOSED LIMITS 1 1 1 \ \ RAINAGE DIVIDE (TYPJ I i ASPHALT DRIVEWAY, / I S \ / DISTURBANCE (TYP.) I NOTE: CONTRACTOR TO ENSURE CONTRACTOR SHALL PROVIDE �- / \ I 1 DRAINAGE ALONG ALTERNATE TEMPORARY ACCESS SUPPORT \ / / / / / / % I I DIVERSION IKE I ,FOR RESIDENT � // / \ � � F w/WIRE i I DD NOTE. SILT FENCE SAFETY FENCE AN VE DRA P I NOTE. POST SPACING SHALL BE A \ D I I I I / J / I l l / / / / aLu I I MAXIMUM OF 8 FEET. HEIGHT / \ TREE PROTECTION SHALL BE INSTALLED I I I I I I II I II II I I I I III cos No. BE AT LEAST 24INCHE5 \ AT LIMITS OF DISTURBANCE. THESE ARE GAP�IC S ALE OFFSET FOR GRAPHICAL PURPOSES. 112066BUT NO GREATER THAN 34 INCHES. ao o is ao 60 20DRAINAGE DIVIDES ARE MEASURED AT THE / I LIMITS OF DISTURBANCE OR DIVERSION / SCALE "=3 DIKE. 1 O IN FEET ) SHEET NO. I I I I 1 inch = 0 ft. I I I l 8 I I 0 VIRGINIA EROSION & SEDIMENT CONTROL 1 I / / I _ EROSION CONTROL HANDBOOK SPECIFICA77ON NUMBER 1. 1 / * NOTE: SLO ES GREATER TH N 3�1 ALL BE P¢�NTEQ / I I � w/WIRE /\ / / / SA SAFETY FENCE 3.01 WITH NAT VE STEEP SLOPEIX rAIIH ANNUAL I / I / J I I I I I I I / / SF SUPPORT / I I / / / / / / / TH 0F�� RYEGRASS BY ERNST CONS RVATION SEEDS AT11A RAZE CE CONSTRUCTION ENTRANCE 3.02 OF 60 LBS. PER ACRE, OR I LB PER i,obo SE, UNLESS / / SCOTT R. LINS� O SPECIFIED OTHERWISE. i / I I I I I I I 1 1 \ 1 \ � ( y�`O° �� �h°� � �ry ham° I // / / / / O � CR CR CONSTRUCTION ROAD STABILIZATION 3.03 JJ I I I 1 / / = / SAF Tp CD Lie. No. 035791 / \ \ I I I I I I I I I / r / I RIP RAP CHANNEL SEE CALCULATIONS PACKET / �p0 2/5/21 SF SlL T FENCE 3.05 ' / I I I I I / / / / / / / t 1 lP STORM DRAIN INLET PROTECTION 3.07 I / / I I I / / �SSIONAL t O � I I / I I I I DD �� TEMPORARY DIVERSION DIKE 3.09 I I I ' R� -1 0--�I TEMPORARY ROW DIVERSION 3.11 I I I I I I I (/� l _ � \1� I � �� � 24" -MP 1 I I I ST SEDIMENT TRAP 3.13 I I I I I I s Sol CIP SB SEDIMENT BASIN 3.14 / I I I \ \ I �� OP OUTLET PROTECT70N 3.18 / I I I I I / / / 1 ` V) V) \ \ I \ _ F- F- U RR RIPRAP 3.19 O I I I I Il I \ \ �\ \\\ I I \ 0 0 w0 1 l CONCRETE WASH y� u u CD _ UTILITY STREAM CROSING 3.25 \ \ l i / I I I � \ \ I / I � \ OUTAREA � J \ \ \ \ \ \ Z o Q TS TS TEMPORARY SEEDING 3.31 i I I I �� v m w w i w En HH£� PS PS PERMANENT SEEDING 3.32 0 � m m u WASH RAC > z o � � aa.. MU MU MULCHING 3.35 \ I I \ \ \ > W W W 7REE PR07EC770N 3.38 I I A V A \ NO E: T IS CONSTRUC ON EN R�NCE S ALL BE � � � I � � w w 0 1D I V INSTALLED, OPERATED, AND MAINTAINED BY THE I I Ln L DC DC DUST CONTROL 3.39 I \ CE x7o' MIN. \CONTRACTOR. ALL CONSTRUCTION TRAFFIC IN THIS w w \ \ \ \ \ \ A\EA SHALL UTILIZE T S STIR C ION ENTRANCE I I I s s BM SOIL STABILIZA77ON BLANKET 3.36 I \ I FINAL LANDSCAPE BUFFER AREA TO BE \ ( I I I g PLANTED AS SOON AS CLEARING AND o / qry 0clo� GRADING OF 7HE AREA IS COMPLETE LOCATI N OF SC IM FENCE I � � I � � \ \ \ \ I \ \ w h �, 1 INSTALLED PER PROFFER zo IN O \ \ CONTRACTOR STAGING AREA ° n \ WITH FUELING TANK, DUMPSTER,o I CONTRACTOR SHALL GRADE THE PROPOSED o I \ I IITCH ALONG AVON STREET EXTENDED IN ESC I \ N o 0 0 o AND PORTA-POTTIES I \ ` � PHPISE�II. IMMEDIATELY FOLLOWING THE ID I \ ° n \ O I I I \ \ I I GRADIN00 G OF THE DITCH THE CONTRACTOR O \ I I I u SHALL SEED &,MAT THE DISTURBED AREAS I I \ \ \ I I I SSOCIATED WITH THEIDITCH. o 0 0 / Vlip W a fV /J F Q I� M VDOTS BARRI6ADE00 1 92 I I NO E: OST SPACING SHALL BE A w/WIRE MAXIMUM OF 8 FEET. HEIGHT )LOCA\ / / SUPPORT SHALL BEAT LEAST 24INCHES / I, I I FENCE ON A LE M / I � 9y 'FENCE I STALLED I BUT NO GREATER THAN 34 I PROFFE io .4N PHASE I \ I 1 � \ INCHE PROPOSED LIMITS OF I I / I 1 I DISTURBANCE=4.47ACRES / I I I I � m °. o \ � IN o/ z/ / I eLo I I I /O yo6 �0� ry ° M 1 \ \ V 69 0 6�8. 0� e� 69 68� I n I 1 V O O° °' h � \ \ s 6 O ,o cP y g (0101I, 6y p m �/ / I `An D 10 �k 6 \ 6 0 6co �htO y ry I D ° m ° \ SAF \ / C j N z ry 682 �O 0� o `'� \ / / / I / SAF � 1 � 6 �� 1 I \ \ \ S \ 684 \ °4 '0'E 8 7 I \ \ / / �/ / // r / M J \ V 690 T 6 g x x l 31 °02'03' 3.10'11 \ W 688 694 N J 692 w 6 6 682 6go � w 6 m I 68o \ 00 \ IP e Ip IP IP IP I- O ID \tD Q z I r \ \ I I s 9a LLI J sF A I 1 \ I I I \\ \ \ H HH J \ 6� — I ° A V A \ TMP 90-31 60� .>I%7 -ilk. ID IqLI_ —I 666 \ \ \ \ o, \ \ \ I I 5.262 AC \ w Io It 229 2 1 "i + o o I 6 o V 1 \ 6oz W '^ m � + ^� ry 1� + �I 664UP 00 IP I I I I I X 604 CONCRETE WASH p LJ 0 °o x i \ A I OUTAREA J LLJ ID I \ \ 4 I 6o6 Q I --I Cil SU/WIRE/PORT \ \ \ _ o w I o I I 608 V I ci O e I `o \ NOTE: POST SPACING SHALL BE \ \ \ \ \ -- ❑LJI \ W MAXIMUM OF 8 FEET. HEIGHT 6 JJ Y 10 a I SHALL BE AT LEAST 24 INCHES \ W o — , — I BUT NO GREATER THAN 34 12 O I 4 IP IP IP ,o � B INCHES. I ° I I o 'Ln1 O �� IP � j I m� AF I IP I 6z4 �._ ul (� z m O \ \ O 95 — I \ I 4 _ — P \ W / I � x �6 / \ Lu Q W I 6 \ — I I f P m M orA I \ V A W — / 1 cn I I W I �\ I 1 I I IP 6 6 I 1 \ 8 8 I Q 688 / 4 � i o IP IP I I I I 1 \ - 5 °1 0 W 07 .99'(T I CD I 6d o / I NOTE: D IVEWAY ACCESS TO N w 00 86, 61� 0 0 b � ry o 0 6 N o CD ".0 N o 00 �0 I- ry o 0o cb c0 a a ry 0 °o 10 0 69 cp 00 co n o m m m ry ry ry N Tp o o ,0 / ,o 0 AVON ST EXT SHALL BE ,0 0 0 0 0 0 0 0 SAF / / PROPOSED LIMITS I I MAINTAINED L ALL TIMES FOR � I EXISTING SINGLE FAMILY HOME. wupp RE OF DISTURBANCE (TYP.) DURING CONSTRUCTION OF SF SUPPORT ASPHALT DRIVEWAY, NOTE POS S ACING SHALL BE A/ / / / % / \ / I CONTRACTOR SHALL PROVIDE w l MAXIMUM OF 8 FEET. HEIGHT Lu I NOTE: SILT FENCE, SAFETY FENCE, AND ALTERNATE TEMPORARY ACCESS r / f / \ TREE PROTECTION SHALL BE INSTALLED I FOR RESIDENT / SHALL BE AT LEAST 24INCHES / / \ a zm AT LIMITS OF DISTURBANCE. THESE ARE I I I I BUT NO GREATERHES. THAN 34 / G AP IC SALE / / JOB No. o FFSET FOR GRAPHICAL PURPOSES. / I I ' 112066 DRAINAGE DIVIDES ARE MEASURED AT THE I I I I I ao / is ao so / / izo I / SCALE 1=30 LIMITS OF DISTURBANCE OR DIVERSION / / I I I I / „ , 1 / DIKE. I I I /! � IN FEET ) SHEET NO. 1 inch = 0 1t. / / / 9 I I rA ED I I /ko /, I I 662 6o g / I I I I � I AT THE TIME OF TEMPORARY SEDIMENT / rrO bh (04 o D � BASIN #i's REMOVAL, THE CONTRACTOR \ e oFOOTLONGAN I \ \6 FOOT HIGH BAFFLES \ \ \ SHALL REMOVE THE TEMPORARY BARREL i CONNECTION INTO PERMANENT STIR 3 & S 1'02PROPOSED iz' CLASS I \ COMPLETE THE INSTALLATION OF STIR. 3. RIPRAP EMERGENCY SPILLWAY W/ r+ FILTER FABRIC M W = =� UNDERLAYMENT i r ■ 7 � -- ALL A t + -� ♦ _ (DEPTH = 2') Z I r - - / FALL 4:1 SIDE SLOPS & STR. 3 ► 3 ; REST ELEV.-638.I 9 I I DA TO ST � = �,7�. A� T 3 - \ 63. 79 Arm ELM PROPOSEDTEMPORARY \ 30 Dp -iS" CMP OUTFALLTO SBi (L=35.3'; u-640.73; A V� TMP 96-31 10=63779; 5-8.33D/o)_ \ \ \ 9,79 \ \ gARREOL. THE CONNECTION BETWEEN SF \ \ i THE RISER AND THE BARREL SHALL BE \ SB1 \ \ I I WATERTIGHT. INVERT OUT OF RISER=630.2S. \ I '6 .7 J NOTE: POST SPACING SHALL C�� - - SF w/WIRE MAXIMUM OF 8 FEET. HEIG \ \ SUPPORT SHALL BEAT LEAST 24 INCF - - - BUT NO GREATER THAN \ \ 6' WI�E TOP OF DAM INCHES. r t \PROPOSED SAFETI FENCE 1 - AROUND SEDIMENT BASIN \ 4o FOOT LONGI N I I I I \ FOOT HIGH BAFFLES \ \ \ -I PROPOSED TEMPORARY z CMP RISER RIM ELEV.= 6 RISER TO INCLUDE A 6" � �I 4" 3T79'' I DEWATERING ORIFICE (INV ELEV.=635.i8) & A TEMPORARY TRASHRACK & ANTI -VORTEX RW D I I DEVICE. RISER SHALL BE FIRMLY ANCHORED TO PREVENT FLOATING. RISER TO BE SET IN A MINIMUM OF 30" OF COMPACTED SOIL OR AGGREGATE BASE OVER A 8'x8'xi#4" I GRAVEL CONSTRUCTION THICK GALVANIZED STEEL BASE PLATE, OR SET 6" INTO AN 8'x8'xi8" THICK REINFORCED 5 SITE ACCESS ROAD CONCRETE FOUNDATION. NOTE, IF STEEL BASE IS USED SPECIAL ATTENUATION SHALL BE GIVEN TO COMPACTION SO THAT 9S% COMPACTION IS ACHIEVED OVER THE PLATE. SEDIMENT BASIN #1 DETAIL SCALE: 1"=20' Sediment Basin Design #1 drainage area (acres) 2.75 MIN. T WISPLLWAV CREST OF EMERGENCY rvmxo T SPUWAY basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) DESIGN NIGH WATER (3S-YR. STORM aEY.) 632.00 1328.0 0 -------- __--_- 634.00 1944.0 120 LaN ) p RISEN CREST 636.00 2661.0 290 STORAGE DEYATEIDNG 638.00 3478.0 517 . S ORAGE� 0.0y00.0 0 0.00 0.0 0 SEDMENT CLEANOUT MNT ( REDtJCED C.TY/ KR 0.00 0.0 0 TO 4 ) wet storage wet storage required (cy) (67'DA'1.2) 221 design high water 638.79 dewatering orifice elevation (ft) 635.18 top of dam (ft) 639.79 wet storage provided at this elevation (cy) 221 top width of dam (ft) 6.0 available volume before cleanout (cy) (34"DA) 94 bottom of basin (ft) 632.0 cleanout elevation (ft) 633.53 approx. bottom dimensions: 45509 distance from cleanout to orifice (ft) (> V) 1.66 upstream face slope: 2:1 downstream face slope: 2:1 dry storage: dry storage required (cy) (67'DA'1.2) 221 baffles: YES principle spillway crest (ft) 637.79 length of flow, L (ft) 90 dry storage provided at this elevation (cy) 221 effective width, We (ft) 43 diameter of dewatering orifice (in) 4.0 L / We (baffles required if < 2) 2.1 diameter of flexible tubing (in) (orifice+2") 6.0 collars: YES runoff. depth of water at spillway crest (ft) 5.79 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z 1) 2 tc (min) 10 slope of barrel (Sb) 4.17% I Tyr 4.1 Q 2yr 5.1 length of barrel in saturated zone (Ls) 41.7 1 25yr 6.0 Q 25yr 8.2 number collars required 2 dimension of permanent collars 4.1'x4.1' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (in) 24 required capacity (Q25-0p) (cis) 0.0 spillway capacity, Qp (cfs) 13.0 bottom width (ft) 12 diameter trash rack (n) 36 slope of exist channel (ft/ft) 16% barrel length (ft) 64 minimun length of exit channel (ft) 33 head on barrel through embankment (ft) 9.46 crest of spillway (ft) 638.79 diameter of barrel (in) 15 Sediment Trap design #2 drainage area (acres) (< 2 ac) 0.71 trap volumes: ORCw CREST OF STONE WEIR � IWygE• � elevation (ft) area (SO volume(ct) volume(cy) cRouND \ 588.5 822 0 0.0 \ " 590 12M 1,508 55.8 DRY STORAGE - WWY■[ 592 2006 4,679 173.3 " 0 0 0 0.0 0 0 0 0.0 WETSTORAGE r wu< (ExuwTED) CLOM DNIGNAL ,FLYER MUTxD wet storage: wet storage required (cy) (67'DA'1.2) 57.1 .SEE P} E 3.'3 CD/ASE MIIEGATE� CLASS I RFRAP bottom of stone weir (ft) 590.02 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) 588.5 dry storage required (cy) (67'DA'1.2) 57A bottom trap dimensions: 27'X47' crest of stone weir 591.0 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 21 top trap dimensions 41'X86' OUTLET PROTECTION SIZING TYPE LENGTH WIDTH DEPTH OP1 VDOT CLASS 1A 8' 9,25' 1,5' OP2 VDOT CLASS 1 A 10' 9.25' 1.5' OP3 VDOT CLASS 1A 16' 9.25' 1,5' Sediment Trap design #3 drainage area (acres) (< 2 ac) 1.00 trap volumes: CREST OF STONE WEIR elevation (ft) area (sf) volume(cf) volume(cy) GR D 588.5 1203 0 0.0 nN 590 1692 2,161 80.0 DRY STORAGE vARA 592 2645 6,463 239.4 0 0 0 0.0 0 0 0 0.0 WET STORAGE ` (ENUWATED) CLOTH mlciNu `FLYER wplxD EYN wet storage: wet storage required (cy) (67'DA`1.2) 80.4 .SEE P ,f: 3.13-1 COARSE AGGREGATE' CUSS I RPRAP bottom of stone weir (ft) 590.00 wet storage provided at this elevation (cy) 80.4 slope of wet storage sides 2:1 weir length (ft) (6xDA) 6.0 dry storage: bottom of trap elevation (ft) 588.5 dry storage required (cy) (67•DA'1.2) 80.4 bottom trap dimensions: 32'X53' crest of stone weir 591.0 top of dam elevation (ft) 592 dry storage provided at this elevation (cy) 80.4 top width of dam (ft) 6' slope of dry storage sides 2:1 top trap dimensions 4TX92' / I I SAF / S L TYPE 2 r� ,y,1v�aw�cu r • OUTAREA1 r al ® --- [i LROAD , _ SEDIMENT TRAP #2 DETAIL SCALE: 1"=20' Al N \ \\ 1 i' Op \ DF DAM AT TIME OF TEMPORARY SEDIMENT TRAP#i'S / I REMOVAL, THE CONTRACTOR SHALL REMOVE THE TEMPORARY BARREL CONNECTIONS INTO PERMANENT STIR. i AND OUT OF / PERMANENT STR.& PLUG ITS OPENING WATERTIGHT / �TEMPORARY CONNECTION FROM PERMANENT STR-2 TO PERMANENT STR-i. 15" TEMPORARY CMP INV OUT=587.62 FROM STR-z;/ INV IN-587.ii TO TEMPORARY STR-A; SLOPE=1.33% 15" TEMPORARY CMP INV OUT=587.oi FROM STR-A; 0 0 / INV IN=586.24 TO PERMANENT STR-1; SLOPE=1.33% j j DID SAF h°� �N TP h� ETE WASH OUT AREA \ LR L ROAD SEDIMENT TRAP #3 DETAIL SCALE: 1"=20' \ 4 TO �. FD U GRAPHIC SCALE 20 0 10 20 40 ( IN FEET ) 1 inch - 20 ft. Lie. No. 035791,E E. 2/5/21 ,j x z z f f o 0 0 W 0 \ 41/ Z zo a Z Z a a O O EI 4 C.' 0 Cr F U U w On W W = w o < < w O On On U Ln z ¢ ¢ Z w w WW w w li Ln Ln s s O N O W N a N Q n ti00 M o 00 N L9 O Z M � M N O F-- Q J r V O WN J Q Cn N U W N o z z Q Q LLI ZJ J U 0 \ / O J _j 1 O P < 1 F� W Y oc O U U) z z U, w 2 w ZLU O QLU F- V) - U) 0 J z LU Q LU � z 0 - CD L I O 0 O N 1211� w F w O w a Ln JOB NO. 8I0 112066 ■ SCALE 1" = 20' SHEET NO. 10 - - - - - - - - - - PRE -DEVELOPMENT SWM PLAN: - - - - - - - _ _ RATIVE FOR THE PROJECT: - POST DEVELOPMENT SWM PLAN:.- PROPOSED STORMWATER MANAGEMENT NAR NOTE: � � � - .7 SCALE 1"=60' 7 - - - _ _ - - - ' - SCALE 1"=6o' OVERVIEW: i - ROOF ILL DRAIAINTO-- - __ _ THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB DOWNSPOUTS WHICH WILL TIE_ ---- --- REQUIREMENTS TO MITIGATE IMPACTS FROM THE PROPOSED IMPROVEMENTS. SUMMARIES INTO TH RRESPgNDiNGYARD �j --- -_ ----- ----- - --- OF THIS COMPLIANCE CAEN VIEWEDITIOS VACKET. AND IN THE ACCOMPANYING LINE HIND THEILOTS / ---- ---- STORMWATER MANAGEMENT CALCULATION$PACKET. / / I_ / ---- ---- -- --- - - -- - - - � � STORM 680- 6g2� /6B4 6� - - - / 680- '_6g2� /684 _ _ _ WATER QUANTITY: 61 IF i N3t-01 ,V E 220 6IF EI � d3001'41"E 22O 4' � 6g6 � CURRENTLY ALL OF THE EXISTING IMPERVIOUS AND PERVIOUS AREAS WITHIN THE PROJECT 6g'b- �. - -� --- . - - - �,� Egg" i / / / 6g2--Mq . 6gg" LIMITS EXIT THE PROPERTY UNTREATED. THE PROPOSED PLAN WILL CHANGE THIS AND - /ELJIL WILL CAPTURE THE MAJORITY OF THE PROPOSED IMPROVEMENTS. THE CAPTURE AND 690 j / / 690 DETENTION OF THE MAJORITY OF THESE IMPROVEMENTS IS REPRESENTED BY 4 / _ - /28 QP4 69z / \ / \ / 4' No o mo mo 692 / POST -DEVELOPMENT SUBAREA A, WHERE AN UNDERGROUND DETENTION SYSTEM / 68 68Co goy eo y �o y �o ATTENUATES THE RUNOFF. THE REST OF THE DEVELOPMENT CONTAINING THE EXISTING J / ■ / / \R / _ � / RESIDENTIAL LOTS AND EMERGENCY ACCESS ROAD THROUGH THESE LOTS IS T0. rs. \ / / / J `. REPRESENTED BY POST -DEVELOPMENT SUBAREAS B & C, WHERE A DETENTION BASIN �c V / 58' 0 ��r V+X ELEV.-3- ATTENUATES THE RUNOFF. CHANNEL PROTECTION IS MET VIA 9VAC25 870 66 SECTION X8' 0 0 O w/ ELEV.=6' I / --'1 - 410 x \ B.3.a. FLOOD PROTECTION IS MET VIA 9VAC25 870 66 SECTION C.2.b. ■ SUBAREA C /El I 0.73 ac. / I ,y/ PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR / tiN=SH �� / / - - 6� / ADDITIONAL DETAILS PERTAINING TO THE STORMWATER QUANTITY COMPLIANCE. Tc=0.15 hrsy T E BO rO�� / THE STORMWATER QUALITY / ' T E BO \ THE STORMWATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT ARE MET SUBAREA B ROP El LIMIT OF \ I 1 ROP SED LIMIT THROUGH THE BEST MANAGEMENT PRACTICE OF PURCHASING NUTRIENT CREDITS. A MINIMUM PHOSPHOROUS REMOVAL RATE OF 3.07 Ibs/yr IS REQUIRED. THE DEVELOPER 0.27 ac. �� / D TURB N (4.47 ac.) IS D TUR NICE 4.47 a S / ( ) \ WILL PURCHASE NUTRIENT CREDITS PRIOR TO THE ISSUANCE OF A LAND CN=58 \ .� SE TO DEFINE THE \ I \ I �� SEE) TO DEFINE THE DISTURBANCE PERMIT. TcTc- 19 hrs. 0°J° o B RY FOR THE VRRM ° a B Nb RY FOR THE VRRM I I I / �� �� J WATER QUALITY \ \ / /C�9 Wo ro a WA ER QUALITY PLEASE SEE THE ATTACHED CALCULATIONS PACKET AND THIS SHEET FOR ADDITIONAL �L�� ---JJJ I �♦ LATIONS TYP. I I I xgo o \ I DETAILS. \ \ / I .� Ea Ea E� \ \ / LATIONS, TYP. =E.' E hrs. �� / rt„yo + o 0 ( 70' OF OLFII w E'qyII EV.Lr 3' \ \ \ 49' OF�ONC. FLOWW w d EIjEV.$2' I f - I, . �� �' (O \ Loa) \ \ \ \ \ �0 \ \ -_ -688- - _ _ 0- I so \ .� I -- 19 =688 686 -684 _ \ \ \ \ °r \ 68i-68o686 -684 682-680' \ 9 - Tc= .1 hrs. . \ Tc=ELE hrs. \ 1 OF OL w/ d LE =5' 30' OF OLF w g1EL_EV.=2' Q rJ \ \ .4 / 1 / \ \ \ 77' OF CONar. FLOW,, w/ d EV. 3' -� 34' OF 4011 FLO \ \ \400'�F CHANNNNEL FLOW 0 65 - \ \ \ \ \ \ V�i r% d ELEV.=14' \ 1\ QI! \ V IF IN MON- \\ ON_ -, \ \ \\ \ \ v v v \\ 686, - u� SUBzzR f A \ v N 0.10 c. \ \ \ ry \ \ \\ \ \ \ \ \ \ \ \ \ 684 _ - - - - �I -■ ;tea / CI1 / \ \ \ \ \ \ \ \ 684 Tc=0.10 hrs. \ \ \ \ \ \ \ \ 682 - - - J \ \ \ \ 682 5 S BAR A A \ \ \ \ \ \ 6---SUBARF/cA - I^ \ \ \ \ \ 6 2.41 ac. �o . \ \ \ \ \ \ \ �0 6 ac. /- b \ \ \ \ \ \ \ `Qo o CN=86 "o C 4 \ \ \ \ \ 61 �� =0.10 hrs. �" Tc=O_21 hrs.p5 V A \ \ \ -� _ _ \ \ UNDERGROUN \ \ \ \ \ \ \ 674 - - - - - ■ 0?6- / / \ \ \ \ \ \ \ \ \ DETENTION \ \\ \ \ \ sad _ - �I \ \ \ SWM 1 s�z - _ _ - - 6 \ \ \ \ \ \ \ \ \ 6681 -� _ _ ■ 67� �/ \ \_\ \ \ \ \ \ \ \ \ \ 6681 - 11+0o J2 \ \ \ \ \ _\ - - / TcELEV.-3' hrs \a \ \ \ \\ _ _664 - � 6166i m� ✓ \ \ \ \ \\ \ \ \ \ 666 - i o' IL \ \ \\ \ \ \\ \\\ \ \ 662 \60 OF OLF w d ELEV.-3' - 6` / / \ \ \ \ \ \\\ \ \ 6621 1] j. , Oi°\ 796' OF CON��LO� EV.=I O' \ _ -- -_ O _ \ \ \ \ \ \ 660 \ \ - - \ \ \ \\ \ 658 `�\ _ \ \ \ / \ \ \ \ - \ \\ �bBAREA B \\ \ \ -656 - s \ \ \ - ---- 77 658 a< aa\ / _ - - - - �-- 0 6 � � � � � \ \ \ \\ �N-81 656 '�� A o \ \ \ \ \ \ 654 - - - - - 6Sk \ \ \ \ \ 652 - - CN8 75. 6S \ \ \ \ \ \ \\ 652 65z _ - \ \ \ \ \ \\ 6So i T = 0 hrs 6So \� 1 - - \ - \ 648 I _ _ _ - , \ \ \ - _ - --� 64 5 � \ _� 6 646 - - - A V - - - \ : - � - --� H BO F � \ \ 648. 648Z _� BO J - -\ \ Tc=6.10 hrs. 6 - - -- 6 \ 646 �- i - - �� PROPOSE-DrtIM3T O€ \\ \ -- - 46- _ A \ - _ I - b°040 - \ \ - - 44 2- IST{JRBANC€ ac. \ 123' CHAar�F�F o��ossE k 644 bo42 IST-URBAIVCEtI �c \ 64z � � '- 4 � TO F T \ \� \ \ \ \ �300' CHANNEL FLOW ®10 ft/s 642 4 - °4° �� TO F T \ � \ \ \ 640 -� /- 8 BOUNDARY FOR -THE VI \ \ - 640 -� 8 _ \ _ ) 3A BOUNDARY FCfR7HE V 638 636 �ER-Q ALITY ��\� \ \ \ \ - - 638 ° - _ 636 WATER -QUALITY \\�\ \ - i ? 634> 10' LC -SAY :" \ \ _ _ - - 6 6j6 I \ - - 6�2= _ - �\\ \\ \ \ 636 3Z4T3W �r10' A -TY \\\ \ i \ \ \ \ _ \ 634 _ % $ - \ \ 634 0 \ \ \ \ \ \ \ 632\ 1� *624, \ \ - �� \ \ \ \ 32 62 630 I I MOj� i i _ i -622 \ \ - \ \ \ \ _ 6 0 ri i 622,, \ \ I - T _ /C /= y\///=�/ 3rLat, ■� - ?�6 �8\\\ � 626 46z4 ? y'_ i 3 6z46z4 6__ C 1s1 8 \�5' hr y _ �3z �0OfoCE�w/ d ELEVs6z2 J \z 55K OF CONC. FLGWi d ELEV-88' '618�\ .t \ rn \ V v v v v 61 I �� �°8 \ V A v v v �3 31 ��08 \ \ \ 6\■° \ \ \ \ \ \ 616 \ a �� \iE� \ ��'��� � oa'v 614' 612� /� / � ■ \ aok\ \ - \ \ \ _ / \\ � \ \ \ \ � _61z� / /� / / � F�sok \ � \ \ \ \ \ 02, \ - /// \ \ \ 610 / 602Ali 60 66 /606// / ■ I • \S9 - \ \ /\ \ \ -606/ SWM2 \S9 -604� / 8� - / \ \ \ -604/ / -• 8� -604- / , '96 - _ \\ \ \ _604- /�5 / ■ s96 DETENTI _ 6°°- I Sg4 / \ \ \\ - - - 600 M I/ / / I 592, S A I 2 v / LP OPOSEO . 592, I-598 EN o S -� \ - 8- / Pre -Development Impervious Area Summary 598 \ PON 9O - - -\ \ 598 \ /__ 1S90 E ISTINGRO DSIDE LOD for Water Quality DITCH � \ \ � � \ � � � � Building 488 sf g / 1 7, / - - \ �5g / / TO BE LINED WITH VDOT \ S89 / 'O y ° �� CLASS II STONE RIPRAP i" Roads/Driveways 19,995 sf EN \ \ '� G - ti4 20,483 \ \ \ � ��i 59 f, \ � \ \ _ \ � 592 OUT FOR OUTLET PROTECTION � i F,L 59°� 2 \ \ \ - - \ p - 590� �� 24 - \ Post -Development Impervious Area Summary - \ \ \ \ EXISTING \ \ / LOD for Water 84. - - 8 / ROADSIDE DITCH \ \ BuildingWat 25,801 sf \ - -- Parkin Areas Roads 46,636 sf 586 „� �� - \ \ \ \ \ - --- -- ti �� _ OUTFALLS TO g / 00�000\ \ 8 i0 - - EXISTING 24" \ Sidewalks &Concrete 7,037 sf CMP \ 79,474 General Construction notes for Stormwater Management Plans Post -Development Impervious Area Summary 1. All dams and constructed fill to be within 95% of Subarea A, Water Quantity CHANNEL&FLOOD PROTECTION SUMMARY maximum dry density and 2% of optimum moisture Building 26,169 sf WATERSHED SUMMARY content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to Parking Areas/Roads 34,179 sf be present during construction of dams. Sidewalks &Concrete 6 979 sf 2. Pipe and riser joints are to be watertight within stormwater Management facilities. 9 67,327 sf 3. For temporary sediment traps or basins which are to be converted to permanent stormwater Subarea B, Water Quantity management facilities; conversion is not to take Building/Structure 1,=597sfplace until the site is stabilized, and permission has been obtained from the erosion control inspector. Roads/Driveways 7, Pre-Dev. Post-Dev. Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Limits of Analysis for Channel Subarea Subarea Channel Protection Compliance Flood Protection Compliance Limits of Analysis for Flood Protection P Protection P y A, B, C, & D I A, B, & C ISecLion B.3.a (Energy Balance) N/A (Energy Balance Satisfied) ISection 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 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'SWM 2' 22,769 sf 3,217 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 ( IN FEET ) I inch = 60 It, 240 SCOTT/R. CULLINS'Z Lie. No. 035791 >, A 2/5/21 47J Z Z H � � o 0 0 W 0 Z J 0 Z O Q Z Z Q O O O c W U Ln CO 7 J J H W VI < Z < Z W a Z O P_ m m U V) Z / O W � a W a W o W Ce U) w w w a� oC 0C cli Q N f) f W O ti N W N O CA N N thew J J U) LU Z10� LU In C. LU W O 0 O N MM F- U Lu 2 a in JOB NO. 112066 SCALE 1"=6o' SHEET NO. 11 n .6 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 x ^ 3. 'COVER RESTRICTIVE WEIR PI o OW POINTTO DRAII pQ m D o SEE DETAIL ON THIS 665 > ��� p W -Sy 665 Fd 2-YRPEAK PROPOSED GRADE (TYP.) EA V) I— ? Z WSE i2 PROPOSED LOWER 1r UNDERGROUND DETE SYSTEM PRIMARY OU 66c 66o / WEIR PLATE INVERT=559.00 715" 65 m m RCP 11.84 LF (al 4.56% 655 _ `^� UTFAL INVERT=658.4 PROPOSED 96" CMP U m SYSTEM Qa o.5o%TO) p rmn oN' FROM THIS DEVELOPP o miD TOTALCMPLENGTH= 65 o Z o o- > v, Z SAFETY SLAB olo (SL-1) REQ'D 65o all / yh�C e �y. 645 645 64 Mo SAFETY SLAB 640 p m F- M (SL-1) REQ'D Olo p MID N p m ato (Q it 0• 00 > 635 m M N 0 ��� It 635 w a > > ) Z Z 6� / 630 EXISTING GRADE (TYP.) 630 p SAFETY SLAB In Om CQ REQ'D 62 0 cn 000lo(SL-i) 9c tihF� 625 _P 0 KI o H tD �V o m > ^.F by1 °�O 62 H a» Ln J-- 620 61 63.5 SAFETY olo(SL-1) SLAB REQ'D N 0� H- 00 "i O 00 0)61 (00,1 > IQ M= 610 0 �WZO ZZ d ,n FZZ 60 6o5 0 MID F N x Oko O C) ZNFO 00 o o ^ SAFETY SLAB 6o n Z a) Q oob (SL-1) REQ'D 600 F-N 06 O n N �H Ln zz n _ O 9ryV 63 o �a>> nH ZZ_ 595 595 59 15 RCP335Mo � 590 LF s85 -91.28 RCP LF @ 585 2S" RCP 23.79 LF Cal 1.00% 58 58o O rri O. Ol '.I LID It to kJD Ln O l0 al V1 1. H . M n t0 00 O) 00 00 O (n Ol H wkJD Ol N O1 O 4 ci N N m M m It ,� m d V1 06 O w tD Ln Ln VD w w W 10 w tD -0+50 0+00 0+50 1+00 1+50 2+00 2+So 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 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. J �° In O O w� RESTRICTIVE STEEL WEIR PLATE, AT LOW POINT, TO DRAIN THE SYSTEM. SEE DETAIL ON THIS SHEET. n 11+00 " INV. 559.48'- / fl.60 LF O c " INV. 55 .42' v v v v CONTRACTOR SHALL CALL THE COUNTY INSPECTOR ,T ERGROUNUNOFFCAUS & ENGINEERING DEPARTMENT 24-HOURS BEFORE ,TTENUATE RUNOFF CAUSED LENT. ANY ANTICIPATED CONSTRUCTION ACTIVITIES FOR i80.QQ' THE BMPs. THIS IS INCLUSIVE OF WHEN THE UNDERGROUND DETENTION SYSTEM SUBGRADE IS READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. 5+50 6+oo 6+50 7+00 PROFILE SCALES i"=5' (VERTICAL) 2"=5o' (HORIZONTAL) 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 NOTE: PROPOSED STORM SEWER SHOWN IS CLASS III RCP. THE CONTRACTOR MAY SELECT A VDOT APPROVED MATERIAL IN LIEU OF THE CL. III RCP FROM THEIR APPROVED LIST PROVIDED ALL PIPE, PIPE BEDDING, BACKFILL AND INSTALLATIONS ARE IN ACCORDANCE WITH THE CURRENT VDOT STANDARDS. ANY PIPE MATERIAL PROPOSED AS CL.IV RCP SHALL NOT BE SUBSTITUTED WITH ANOTHER PIPE MATERIAL. 11.0T LF @ 5% o� n 096" INV, SERVE_RIVATE ROAD TO AS " ACCESS TO SWM FACILITY 659.00' 1$ 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 OUTFALL T 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 EQUIVALENTTO AN ORIFICE WITH AN ELEV.=667.00' APPROX. DIAMETER OF 013.23" (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 STEEL PLATE T ORIFICES, TYP. SEE THIS SHEET FOR DETAIL, OR EQUIVALENT. ELEV.=659.00' 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 r Oo O� > 0 4 N ID LA a�F ? O Lj)�ZZ STR:4 VDOT MH 675 TP=67o.41 INV IN: 658.46 TO SWM 1(2) R INV IN: 66o.44 TO 4A OPOSED GRADE (TYP.) INV OUT: 652.46 TO 3 67 70 r-EXISTING GRADE (TYP.) B ` PROPOSED ELEVATED 15" PIPE 66 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 10 LF Qa 15-94% 65 55 PROPOSED 96" CMP UNDERGROUND DETENTION SYSTEM Cal o.5o%TO ATTENUATE RUNOFF CAUSED FROM THIS DEVELOPMENT. TOTAL CMP LENGTH=180.00' SAFETY SLAB_ 65 (SL-1) REQ'D )50 cq H S Vo O n VO tD -0+50 0+00 0+50 EMERGENCY BYPASS PROFILE SCOTT/R. CULLINS'Z Lie. No. 035791 A 2/5/21 4rj x w w � � o O O W L ZZJ o a z z a o o 0cIf � wm U 7 J J F w , < < a O pm m U > ul) Z a a 0 LVLU aao w w W ce U)u� W W W N m m ON A co co In D C. W Lu C) 0 C) N MM z w ^< Q I..L LLJ > 0 i Q I --I z LL z � O / Q 0 l!1 F- O w 0c x a ,n JOB NO. 112066 AS SHOWN SHEET NO. 12 HUGGER SINGLE BAR, BAND FLAT GASKET BOLT AND STRAP(SBBS) 7 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. BANDSARE NORMALLY FURNISHED AS FOLLOWS: • 12" THRU 48' 1-PIECE • 54" THRU 96' 2-PIECES • 102"THRU144'3-PIECES 5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS. 6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 22/3'xl/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 46" TYP 36'TYP 30" SEE TYPICAL BACKFILL DETAIL NOTES TYPICAL SECTION VIEW ►L�]rNbYNa1�� 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"#57 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. TRENCH CONDITION EMBANKMENT CONDITION INITIAL BACKFILL w o do Sa \ 7 q p a 11 a �� ��?�, o I11 5 11 BEDDING 3//�� ''-r,,, ✓ MIMI FOUNDATION 2 IN SITU DIAMETER MIN. COVER CORR. PROFILE T-10" 12" 1 1/2" x 1/4" 12"-48" 12" 2 213" x 1/2" 54"-96" 12" 3" x 1", 5" x 1" 102"-144" D/8 3" x 1", 5" x 1" I- 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 CORRUGATEDSTEEL 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 BACKFILLFOR 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 NOT TO SCALE I:Wr r,rrt I/2' zinc hook eltaehetl withth 3/6' fazfener • ®� ® L-1/0' diehole. ci a ®® ® Isometric 1/4' HDPE pale (optional) . Q -ol1u/l8 lo" nhn aIlnese. aonrd c1Quol pl at. nfvtucd by ?1.wOOOO 00oo he. rite epti"re] plate HDPF at-ucblrel pill+tic with holes antl 1/4 plate ��('CLIO❑ mecufaetuead by Retitle Solulio ne Inc. or cau•I 6/B• die hole � tlllY/ a dike DEBRIS CAGE Elevation 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 LASTIC SOLUTIONS P.O. Rav a Fle NincOeoter 1'X @dll INC. BT]-BTY-6Y2Y rn.ple0ie-Wuwmm 36"0MAX.,HS-25ACCESS CASTING REINFORCING TABLE WITH GRADE RINGS AS REQUIRED, TO ] ) BE PROVIDED AND INSTALLED BY "BEARING TEMPORARYCOVER FOR CONTRACTOR. MAYBE TOP MOUNTED O CMP SCOTT R. LINS'Z CONSTRUCTION LOADS ?.r._>_'" "._.,; CMP AS SHOWN)OR RECESSED. Of A B O REINFORCING PRESSURE O �, PROTECTION ( W RISER RIMlFINISHED ________ 8 {PSF) 1c. o.035791 FINISHED SLAB GRADE r, L� L' N ,'� HEIGHTOF GRADE 7�-___--__ - 5 VARIES N 4'0 #5@10'OCEW 2,540 "oPO� 2�5�21ty� COVER oT = -=� ---� 24" 4k4' 26" #5 @ 10- OCEW 1.900 IONAL a a - a . - n e _ 4'-TO #5 @ 10' OCBN 2,260 _a a 30" 4'-6" x 4'-6" 1 32 #5 @ 9" OCEW 1,670 GASKET MATERIAL 0 CMP RISER ¢ 36„ 5 x5 ' 38 #5 c@ 8" OCEW 1,500 SUFFICIENT TO PREVENT R EV ENT CONSTRUCTION LOADS SLAB FROM BEARING ONJ w 5'-6"0 #5 c@ 8" OCEW 1,490 RISER TO BE PROVIDED BY 42' S'-6" x 5'-6" 44 #5 @ 8" OCEW 1,370 FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRA AMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER CONTRACTOR. 08 11"TYP. rn 6'0 #5 @ 7" OCEW 1,210 THE TOP OFTHE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. SECTION VIEW 48• 6'x 650 #5 @ 7" OCEW 1,270 THE USE OF H EAVY CONSTRUCTION EQUIPMENT N ECESSITATES GREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE COVER MINIMUMS FOR NORMAL HIGHWAYTRAFFIC- PIPE SPAN, INCHES AXLE LOADS (Kps) 18-50 50-75 1 75-110 1 110-150 MINIMUM COVER (FTI 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 OF THE MAINTAINED CONSTRUCTION ROADWAY SURFACE. CONSTRUCTION LOADING DIAGRAM NOT TO SCALE SPECIFICATION FOR CORRUGATED STEEL PIPE-ALUMIN VED TYPE 2 STEEL SCOPE HANDLING AND ASSEMBLY ASSUMED SOIL BEARING CAPACIT ACCESS CASTING NOT SUPPLIED BY CONTECH TO. A A L g #4 DIAGONAL TRIM II ----- 94 DIAGONAL TRIM _ fi v I BAR (TYR.4 PLACES), BAR (TYP.4PLACES), ___����__ _�, SEE NOTE 7. SEE NOTE 7. - ---''t --- - --� - t---- � It - 2"COVER I I s I I (TYR) Ale .G Q1 I)1 � j I ��i !1i G {Ql 4 NI I 11i 'J I �I 111 i / II OPENING IN OPENING IN __ _ 11L �a �� 11 _ -_ PROTECTION PROTECTION -- tC� j--Jj��7 -- SLAB FOR SLAB FOR I i , ,� I/�� i I ACESS I I I �I �� ,� I,,� THIS SPECIFICATION COVERS THE MANUFACTURE AND SHALL EE IN ACCORDANCE WITH RECOMMENDATIONS OF THE INSTALLATION OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) THE PROJECT PLANS. INSTALLATION MATERIAL SHALL EE 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 REQUIREMENTS OF AASHTO M36 OR ASTM A760. 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 %' (#6) REBAR CAN BE CUT FLUSH - " ALL STEEL PER ASTM A36 TO OUTSIDE OF RAIL (BAR LENGTH = 163/4") OR BAR CAN o ri EXTEND BEYOND RAIL Y2"t FABRICATION TOLERANCE: tV4" " FLATBARANDREBAR:MILL 318" TOLERANCE APPLIES TYP. 12" TYP. CENTER TO CENTER W HOLE wl %" REBAR RUNG, RUNG SPACING WELD REBAR TO RUNG ON OUTSIDE OF STEEL RAIL " 2Y2" x Ye" FLAT BAR SIDE RAIL PLAN SIDE NOTES: 1. LADDERS CAN BE MADE IN 20'-0" 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 2z33022,5x1,3x1,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 ACCESS INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. STANDARD STANDARD REINFORCING, REINFORCING, SEE TABLE SEE TABLE ROUND OPTION PLAN VIEW NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 171h 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 ZS"x3"xy"x16"LONG ATV-0" MINIMUM OF4ANGLES P SPACING. LONG LEG TO LADDER SECTION, (2 EACH SIDE 4 PROJECT OUT. WELD TOP LADDER) 6' MAX. SPACI 1'_6" AND BOTTOM OF 3" LEG TO EACH VERTICAL MAX. CORRUGATION CREST (THESE ANGLES SHOULD BE USED a FOR LARGER DIAMETER a MAINLINES WHERE ADDITIONAL STEPS ARE NEEDED) 6" FROM RUNGTO RISER JOINT 6" FROM RUNG TO RISER JOINT SECTION A -A RISER LADDER DETAIL NOT TO SCALE I I I � I 4 1 a INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. OB 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, ARCHITECTS AND LAND SURVEYORS, ENDWELL, NY. MANHOLE CAP DETAIL (4)%6" FILLET WELDS FROM EACH ANGLE CORRUGATION CREST (2 WELDS EACH SIDE) (4)43"x3"x3/6" _ 5%2" LONG (2)Y4' FILLETWELDS 1" LONG FROM EACH ANGLE TO LADDER RAIL RISER NORMALLY CMP WITH 22/3" x Y2" CORRUGATIONS (4)%6" FILLET WELDS (4)Y6" FILLET WELDS FROM EACH ANGLE TO FROM EACH ANGLE TO CORRUGATION CREST CORRUGATION CREST (2 WELDS EACH SIDE) (2 WELD EACH SIDE) ZYx3"x3/ts" Z3"xTax %g" 5Y2" LONG 5Y2" LONG NOT TO SCALE LADDER RAILS PLAN ELEVATION LADDER R/ AND RUNG x w w � � p O O W p In a ZZ o a z z o o O W u^ U ca 7 J J H _ = W U) Of 0i W a O LU co co U Z / o W � a W a W o W U) 0 W W w °C IY IY Q N rn f O ti C4 ON W N O N N 1\� Ln z Q Q a W Z :2LJJ / kj 1 Q H� z Q LL z � \O / Q 0 V) H- Lu W O W CC 2 a to JOB NO. 112066 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 Specmcarions Property Test Method Unit 5 ihcotion PermeabilRy ASTM D-2434 Cmisec 1 x to - Plasticity Index of Clay ASTM D-4231424 % 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 Diormwraler Mana(gernent Handbook (7999) 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.. INTERIM FINAL ELEVATIONS EMBANKMENT NOTES: / ( g, / ) AFTERAN INVESTIGATION OF THE SITE'S SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) EXAMINATION OF VA DEQAPPENDIXA: EARTHEN EMBANKMENT, THEAPPLICANTHAS PROVIDED A COMPREHENSIVE 5. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE($). EMBANKMENT DESIGN THAT DOES NOTNEEDA GEOTECHNICAL STUDY AT THIS TIME. SUCH ISTHE CASE DUETOTHE 6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE) PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) ARE LISTED BELOW, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT A MINIMUM. zinc plated hook hed with a/8' faelener 1&1/2" 1/8" die. holes Isometric pipe 1/4" HDPE plate (optional) .ut,.e,t �.�•. HDPF Y. O 2-1/ structural plastic with 2-1/B- holes and 1/4' plate OO manafaolurcd by Plastic Bolullona tnc. or equal 000 0000 • shown Witt, optional plate r�id*� aAz HnPF ahmlarel pkialln with 2-I/8" holes and 1/4' plate CC(.ION manufactured by Plastic Solidi... Ina or equal ;;'n' din Hole. 0 0 o O o 00 0 0 single BNP .rflee Ele VOLIon PLASTIC p o. pox aaae DEBRIS CAGE SOLUTIONS «;whoa,, U U1104 INC. e77-877-5727 an plelli-mluinrnm 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 ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED 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: T1YIC:AL GRAPIRICAL DETAILS r---------� ` I /�? /,. i�. 4• min CW eD trench-4' below suitable) nxderial l Soil or rock L-----------J TYPICAL HOMOGENEOUS EMBANKMENT Iransi5on 611 at or grovel 'Pipe outlet Course fill r Perforated collector around SO S OuMotibn drain 4Bhnkel drain FOUNDATION DRAIN BLANKET DRAIN nal aa" wai Ronk a growl Rod I. 0fdi0 �Tranai6en filler Tronoitidn filler CHIMNEY DRAIN TOE DRAIN t191I A-18. IfemegehelynS Cn1D811 fiPITS e•/ Seepage L 0rlrref, 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 : 25 24" RISER 4 TP=591.10 INV OUT: 587.00 TO STR 24 595 595 FRI EBOARD aao-YR PEAK WSE=59a.27 -EXISTING GRADE (TYP.) -PROPOSED GRADE (TYP.) 590 3. r ao-YRPEAK WSE=5ga.o7 590 2-YR PEAK E WSPEAK a-YR PEAK WSE=59o.6o 585 585 1511 RCP BOTTOM OF BASIN =587.00 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 TN ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOWN DIMENSIONS IN INCHES PLAN SIDE VIEW StormitaXTM Round Series forConerete Manhole Pwrl Na WA BkwC Man ID kiln OD RS-24 17 %4 2B 24 30 RS-36 21 ale% p b 36 43 ILSY 27 IM . 46 S7 Rya 27 K 6634 60 70 Plastic SOhl" s, Inc cuBraE2 FO Bon 4380. VM[M ha VA Ii4104 ZM McGhee RC. 14111 J.. VA lIEDT ;677)977-i717 Ph°^e I'100[Cf: 1540 722.2z19lax htiRIIwww.hlaalc- oludon.rom twe wINR1aIlAl wnem RAwrFsduR1�9.4G 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 OVERHANG HDPEAN71-VORTEXPLATE X DAIS DRAM III /44DBY: DFTNL DRAINAGE DESCRIPTIONS STIR. PIPE INFORMATION INLET INFORMATION NO. DIA. (in.) LENGTH (0.) 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 MH-1 - - 671.44 VDOT STD. IS-1 REQ'D 15 9.10 15.93% 661.89 660.44 RCP 4 MH-1 - - 670.41 VDOT STD. IS-1 REQ'D SWM 1 MH-1 - - 670.95 VDOT STD. IS-1 REQ'D 15 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 MH-1 - - 658.93 VDOT STD. IS-1 REQ'D 15 67.47 8.00% 640.73 635.33 RCP 36 MH-1 - - 644.09 VDOT STD. IS-1 REQ'D 15 61.78 8.00% 629.33 624.39 RCP 3B I MH-1 - - 629.13 VDOT STD. I8-1 REQ'D 15 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 30 MH-1 - - 602.63 VDOT STD. IS-1 REQ'D 15 87.75 3.35% 592.88 589.94 RCP 2 MH-1 - - 593.69 VDOT STD. IS-1 REO'D 15 91.28 1.51% 1 587.62 1 586.24 RCP 1 MH-1 - - 591.17 VDOT STD. IS-1 REQ'D 15 1 23.79 141% 586.14 585.90 RCP OUT 19 12" YARD INLET - - 649.50 8 122.09 643.00 631.69 HDPE 20 12" YARD INLET - - 635.50 8 112.61 1 626.34 612.83 1 HDPE 21 12" YARD INLET - - 635.50 8 67.01 610.55 602.83 HDPE 22 ZV YARD INLET - - 6a5.50 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 19 11.82 590.59 590.47 HDPE 25 24" HDPE RISEF - - SEE DETAIL - 15 53.94 2.78% 587.00 58&90 RCP 20 SWM z 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 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. / 25'XNIDE PROPOSED GRASS LI ED - / EMERGEpYCY SPILLWAY WJya SIDE qE 5LO ES AND CREST ELEV.=S 2.a / / 8' WIDE TOP -OF -DAM ELEV: 592.27 / / 2 592.27+ so DETENTION BASIN DETAIL: SCALE 1"=20' ALBERMARLE COUNTY AS -BUILT CHECKLIST: 92.2] 1:2.27, \ s96- 1 S94- OFB, IN=587.00 1 SCOTT/R. CULLINS'Z Lip. No. 035791 A 2/5/21 4rj 2 w w � � p 0 0 w Z J 0 Z o a z z a o o w Lo Do 7 J Lu J H W Ln Otf � Otf � w a 0 m m U U Z Q Q .Z. / O W � a w a w o w Ce U) w w w Q N cri f M. (n ti M ® C� (n COUNTY OF ALBEMARLE N R Department of Community Development M *e Construction Record Drawings (As -built) for VSMP W N The following is a list of information required on construction record drawings for rn J N _ stotmwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the CV Q construction record drawingbe prepared b someone other than the designer. Please do not P P y g Q z� provide design drawings as construction record drawings. > Q LV A. A signed and dated professional seal of the preparing engineer or surveyor. ®� LLJ 0 B. The name and address of the firm and individual preparing the drawings on the title sheet. ® J C. The constructed location of all items associated with each facility, and the inspection records to verify Z > proper dimensions, materials and installation. The items include, but are not limited to the following: W 1. Inspection Records and photographs for pipe trenches and bedding, including underdrains. W 2. Video Pipe Inspection for any pipes which are not accessible or viewable. LV 3. Updated Location with geo-coordinates of all facilities. O > Ur 4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities. J I Q 5. Current physical and topographic survey for all earthen structures. Ponds should include a survey of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required Q I--t Z for alterations from the design. = I --I Q 6. Plants, location and type. () 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the I ' installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s), Y inlet and outlet protection, alignment and invert elevations compared to design. W Q Lu 8. Computations: For significant deviations from design, provide sealed computations verifying that Q> the as -built condition is equivalent or better than design. z 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical W sections and linings. O 10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage W Q must be within platted easements. Provide copies of recorded documents. LU 11. Guardrail, fences or other safety provisions - Display the constructed location of all safety Q provisions; fences, guardrail, including the type, length and applied end treatments, compared to design. W V) 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. Biofilter media must be an approved state mix. W 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. of 14. Compaction reports are required to verify fill compaction in dams. Q 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. mannal UI 0 C) C] N H LU 0 w a In 112066 AS SHOWN SHEET NO. �4 TH u �% 6° 0 �lb �°ry ABLEWID H 'h"I / / / / // /SCOTT R. LINSZ VA I I I I\\ i // I I I I I I I 1 1 / •—� SWM FACILITY I / L.) Lie. 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N p ...... �, � .:: TMP 9�-31 ', ...� !ALL y 60 '.,/ 23A � � 33 ^ E� 3 \ \ I 1 � I FFE-6 00 1 .. � io iD � :ii .a�ii:::. o' � :::1 � � \ p L.L \ - ---- 1 FFE=6 5o 6 . 1 II - 7 . 1 11 I. 66 `D i I '::iii .- zo' PUBLIC :4 5.262 AC \ / i�i J % \ \ �� + I LOT h - - I -- -_ l 6';;:.:•. PROPOSED STORM DRAINAGE ESMT 5 , n h° f U p i� o I oyj 4 \ :':'::ri OUTFALLPIPE DB. PG. /� /6© \\ W ` V AR=688.50 4�0 I �. � � �,-_ L I � I � m o 0 o I :�::�. � . 1 22,9,211 SF � � \ \ \ \ q o d FE=689.i.7 i o 1 a< - - --J 6 ° L _ 5 i I i5 i 664 ;;;`` .. OPEN SPACE__ - \ \ / / /af.. \ \ \ z LOT $ 1 _ 18 22 604 \ \ \\ CONCRET Q cO co i7 I 8 a N AR=687.503 *:. DRPRIVATE SR CK W \ \ \ \ \ \ \ \ 60FE=688AINAGE ESMT 6V IA \ \\ \ orn0.co \woZF� 4o2o� O 1 }I Nworzi � VARIABLELOT II /fI II \ I \\ L\OT 3 Q 1 O M 6, LV 296� _DESOTO DR E WIDTH C~i)_ "' 40,020 S osFACILITY E4 49' PRIVATE 49'PRIATE O. ACCESS z § I�7cl��/// O J AIR. DB. PGLOuj 9 E=-687z7 4% ,C�N�ET0PRIITE =8661ILL]LJ 6 DRAINAGE ° ---.- l A. 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I I / / / / / NSF JOHN OR R1JB�' 1 BR00$S 0 w I XISTI MANAGED STE / / ' / / / l / DD/1191 / 396 / a m fJ )EP SLOPES TO REMAIN / ' / / TMP +JO-3�A I I I I I I ) / / / / 3oe No. I A / / NOTE: ALL PUBLIC WATERLINE /NIF GARY D OR )MYRTLE BROOKS � I I I I I / GRAPHIC /SCALE / NOTE: ALL PUBLIC WATER AND SEWER - / EASEMENTS SHALL BE PLATTED PRIOR / / DB 1 �1 PG/ 396 I I I I I I f I / / ����� I- - -- FACILITIES SHALL BE DEDICATED TO TO FINAL SITE PLAN APPROVAL / / / J I I I I / I ao 0 0 30 / oo zo / / SCALE I I THE ALBERMARLE COUNTY SERVICE - / / / / / / / / / I I I I I I / I I / / 1�� = 30, I I I A AUTHORITY // // / / / // // // / / / I I I I I I / / I ( IN �EET )/ SHEETNO. inch 30 ft.