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HomeMy WebLinkAboutWPO201600058 Plan - VSMP WPO VSMP 2016-11-28GENERAL NOTES OWNER/APPLICANT- 06100-00-00-16500 Sheet Title DUNLORA INVESTMENTS, LLC COVER 455 SECOND ST SE, SUITE 400 EX. CONDITIONS AND DEMOLITION PLAN CHARLOTTESVILLE VA 22902 ENGINEER: COLLINS ENGINEERING v� 200 GARRETT ST, SUITE K PHASE II EROSION & SEDIMENT CONTROL PLAN CHARLOTTESVILLE, VA 22902 EROSION & SEDIMENT CONTROL NOTES & DETAILS (434)293-3719 SURVEYOR: CARDINAL SURVEY TAX MAP PARCEL: 06100-00-00-16500 (DB 4657 PG 413) TOTAL PROJECT AREA: 8.62 ACRES TOTAL. ZONING. • R-4 RESIDENTIAL (BY—RIGHT) — NO PROFFERS PROPOSED USE. 16 SINGLE FA MIL Y A TTA CHED UNITS AND SCALE 17 SINGLE FAMILY DETACHED UNITS REQUIRED DENSI TY 4 DWELLING UNITS PER ACRE PROPOSED DENSITY 33 DU/8.62 AC = 3.82 UNITS/AC OPEN SPA CE. REQ: 2.16 AC OF DEVELOPMENT AREA (259'); PROV: 2.69 AC OPEN SPACE (319) � THE OPEN SPACE WILL BE DEDICATED TO THE HOA. BUILDING HEIGHTS. • MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET SETBA CKS• FRONT 5' MIN AND 25' MAX 20o SIDE: 10' BUILDING SEPARATION -- REAR. 20' MIN AND NO MAX (2) LOTS ALONG RIO ROAD (INFILL SETBACKS) t% FRONT.• 25' � > SIDE- 5' 6' REAR: 20' SUBDIVISION STREETS. CURB & GUTTER (PARKING ON ONE SIDE ONLY) WA TERSHED: THIS PARCEL IS NOT IN A WATER SUPPLY PROTECTED AREA — SITE DRAINS TO MEADOW CREEK. AGRICULTURAL/ FORESTAL DISTRICT NONE TOPO & SURVEY- ON—GROUND SURVEY PROVIDED BY CARDINAL SURVEY IN SEPTEMBER w 2016, AND FROM DEEDS AND PLANS OF RECORDS DA TUM: NAD 83 EXISTING VEGETA TION: PARTIALLY WOODED WITH EXISTING RESIDENCE STRUCTURES CRITICAL SLOPES: MANAGED AND PRESERVED STEEP SLOPES ARE SHOWN AND LABELED. LIGHTING: NO LIGHTING IS PROPOSED PHASING: SITE TO BE DEVELOPED IN ONE PHASE. 1:'}fLITIES: PUBLIC WATER AND SEWER RECREATION: NOT APPLICABLE/NOT REQUIRED PARKING. 2 OFF—STREET PARKING SPACES SHALL BE PROVIDED FOR EACH DWELLING UNIT + 4 GUEST SPACES (MIN). GUEST SPACES SHALL BE LOCATED ALONG THE ROADWAYS BUILDING SITES. • PARCELS 1-33 MAY NOT BE FURTHER DIVIDED. ONLY (1) DWELLING UNIT PER LOT SHALL BE ALLOWED. BURIAL SITES. NONE STREAM BUFFERS/FLOOD LAIN: THERE IS A PORTION OF A WPO STREAM BUFFER LOCATED AT THE SOUTHEAST CORNER OF THE SITE. THERE IS NO 100—YEAR FLOODPLAIN LIMITS ON THE SUBJECT PARCEL, PER FEMA MAP 51003CO229D; FEBRUARY 4, 2005. OFFSITE DISTURBANCE: NO OFFSIDE DISTURBANCE IS PROPOSED WITH THIS PLAN, EXCEPT FOR THE TIE—IN CONNECTION TO THE SANITARY SEWER WITHIN EXISTING UTILITY EASEMENT. LANDSCAPING: LANDSCAPING WILL BE PROVIDED WITH THE ROAD PLAN AND SHALL COMPLY WITH SECTION 32.7.9 OF THE ZONING ORDINANCE, WHICH WILL INCLUDE STREET TREES ALONG THE ROADWAYS. RETAINING WALLS: TWO RETAINING WALLS WILL BE PROPOSED WITH THE ROAD PLAN. SIGNAGE, • NO SIGNAGE CURRENTLY PROPOSED. TRASH COLLECTION: TRASH RECEPTACLES SHALL BE MAINTAINED ON EACH INDIVIDUAL LOT. ALL TRASH SHALL BE COLLECTED BY A DRIVING DUMPSTER SERVICE. DAM INUNDA TION: THIS SITE IS NOT WITHIN A DAM INUNDATION ZONE. IMPERVIOUS AREAS. • SEE SWM PLAN LAND AREAS.• OPEN SPA CE. 2.69 AC. (319) LOTS 4.83 AC. (569) ROW DEDICATION: 1.10 AC. (139) VSM t t LAN FOR DUNLORA PARK WPOM2016M00058 RIO MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA OWNER DUNLORA INVESTMENTS, LLC 455 SECOND STREET SE, SUITE 400 CHARLOTTESVILLE, VA 22902 SCALE: I"= 60' ENGINEER COLLINS ENGINEERING 200 GARRETT STREET, SUITE K CHARLOTTESVILLE, VA 22902 Sheet List Table Sheet Number Sheet Title 1 COVER 2 EX. CONDITIONS AND DEMOLITION PLAN 3 EROSION & SEDIMENT CONTROL NARRATIVE 4 v� 5 PHASE II EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL NOTES & DETAILS 7 STORMWATER MANAGEMENT PLAN (PRE—DEVELOPMENT) 8 STORMWATER MANAGEMENT PLAN (POST—DEVELOPMENT) 9 STORMWATER MANAGEMENT NOTES & DETAILS z LU SCALE VDOT STANDARD STOP SIGN J ¢ � O U � z EXIST7NG CONTOUR � O v VICINITY MAP oUj 20o PROPOSED CONTOUR -- EC -3A DITCH SCALE: 1" = 500' t% z � > PROPOSED SPOT ELEVA77ON 6' DEPTH OF EC -3A DITCH w Sheet List Table Sheet Number Sheet Title 1 COVER 2 EX. CONDITIONS AND DEMOLITION PLAN 3 EROSION & SEDIMENT CONTROL NARRATIVE 4 PHASE I EROSION & SEDIMENT CONTROL PLAN 5 PHASE II EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL NOTES & DETAILS 7 STORMWATER MANAGEMENT PLAN (PRE—DEVELOPMENT) 8 STORMWATER MANAGEMENT PLAN (POST—DEVELOPMENT) 9 STORMWATER MANAGEMENT NOTES & DETAILS 9 TOTAL NUMBER OF SHEETS llI _— — EXISTING CULVERTEARTH r DITCH CULVERT UUj DRIVEWAY CULVERT Q DROP INLET & STRUCTURE NO. W BENCH MARK 0 w ° U cl- CURB _ — _ _ _ CLEARING LIMITS 122071 CURB & GUTTER ° SCALE VDOT STANDARD STOP SIGN 0 PROPOSED PAVEMENT C ° EXIST7NG CONTOUR PROPOSED PERM PAVERS 20o PROPOSED CONTOUR -- EC -3A DITCH 240.55 PROPOSED SPOT ELEVA77ON 6' DEPTH OF EC -3A DITCH APP OVE0 y thaAlbe!iopiric County 'ate i7 Re coi C) Ul Z z w W Z C� Z W Z J O U O 0 U N u) u) Q) x a� s 0 3 ° 0 U cn E 0 U 0 a ° 0 a 9 0 U ° 0 U 0 a E 0 .O U C Q) 0 m o ° O d Q T ° 0 a ° ° 0 ° 0 a 0 L ° o_ re o W / o O U a U a 0 Q ° ° 0 T ° E a ° c� z W Li z z W cn z O U 0 T L (D D_ o Q .u) ° U x 0 Q) L U S Lu J ° UUj ~ m rn W E 0 w ° U cl- a )08 NO. 122071 o ° SCALE AS NOTED 0 C ° U S (�AF�°-� TT R.COLLINS. ISO. 035791,E IflNAL E� LLJ z z W cn z J J 0 0 0 u) TMP NUMBER OWNER ACREAGE ZONING DB/PG A 062FO-00-00-00OA1 CLUB DUN LOCA, LLC 2.96 AC R-4 3574/668 B 062FO-00-00-01500 SCHWARTZMAN, JOEL & ZIVA 0.48 AC R-4 4679/643 C 062FO-00-00-01400 MCPHERSON,, MICHAEL OR CAROLYN 0.44 AC R-4 3220/313 D 062FO-00-00-01300 CROSS, WHITMAN OR JOY LEVICK 0.36 AC R-4 1752/455 E 062FO-00-00-01200 LEVI N, J LI US OR ETTA 0.33 AC R-4 4060/598 F 062FO-00-00-01100 RICHARDSON1 DAVID OR VICTORIA 0.31 AC R-4 4424/509 G 062FO-00-00-01000 PAN OS, STEVE OR JOANNE 0.29 AC R-4 1679/341 H 062FO-00-00-00900 WILLI FORD, JASON OR KWAMINA 0.31 AC R-4 3779/329 1 062FO-00-00-00800 JAMES, DAVIE, OR REGINA 0.26 AC R-4 1735/638 J 062FO-00-00-00700 WHEELER, THOMAS OR MARY 0.25 AC R-4 2101/463 K 062FO-00-00-00000 ROBERT HAUSER HOMES, INC 1.39 AC R-4 1621/036 L 06100-00-00-16900 CITY OF CHARLOTTESVILLE 8.70 AC R-4 4622/523 (�AF�°-� TT R.COLLINS. ISO. 035791,E IflNAL E� LLJ z z W cn z J J 0 0 0 u) GENERAL NOT ES 1. THE OWNER/DEVEL01I ER OF THIS PROPERTY IS: DUNLORA INVESTMENTS, LLC 455 SECOND STREET SE, SUITE 400 CHARLOTTESVILLE, Vi 22902 2. THESE PLANS HAVE BEEN PREPARED BY: COLLINS ENGINEERING, INC 200 GARRETT STREEiT, SUITE K CHARLOTTESVILLE, VA 22902 TELEPHONE: (434) 293-3719 FACSIMILE: (434) 293-2813 3. SOURCE OF TOPO 8q SURVEY: ON -GROUND SURVEY PROVIDED BY CARDINAL SURVEY IN SEPTEMPER 2016, AND FROM DEEDS AND PLANS OF RECORD. 4. ZONING: R-4 RESIDENTIAL 5. TAX MAP AND PARCEL NUMBER: TMP 61-165 6. USGS DATUM: NAD 83 7. LOCATION/ADDRESS OF PROJECT: DUNLORA DRIVE 8. PROJECT AREA: 8.62 ACRES 9. SITE PHASING: NONE 10. PUBLIC UTILITIES: WATER & SEWER * COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK, SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND REGULATIONS. WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY CONSTRUCTION STA TED PRIOR TO PLAN APPROVAL. EROSION �c SEDIMENT CONTROL MEASURES. STRUCTURAL EROSION ND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOW/NG: 3.01 SAFETY FENCE.• A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBITE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE�TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. EROSION CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES 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 REGULA TIONS ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP 1N 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 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. 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 TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION lS ACHIEVED. ES -8: DURING DEWA TERING 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 EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. EROSION CONTROL NOTES 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. A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE SEDIMENT 'CONTROL REGULATIONS. AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS PLANS TO SHOWN ON THE LAS RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED ASS ST CLEARING. THE FIR STEP INC R NG REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE IRP L'p,E, f MAINTAINED ON THE SITE AT ALL TIMES. 3.05 SILT FENCE: S Leleslbs. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED THESE PLAINS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE DETAIN SMALL AMOUNTSF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. OPERATIONS IN ORDER TO�PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH DETERMINED BY THE PLAN APPROVING AUTHORITY. MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL ACCORDANCE WITH THE VI�GINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). FINAL STABILIZATION IS ACHIEVED. Annual Rvegrass 60- 200 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING 3.07 STORM DRAIN INLET PROTECTION: DEVICE. E AROUND A STORM DRAIN DROP IMPOUNDING AREA A SEDIMENT FILTER OR A EXCAVATED l N E ON LL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND 9. THE CONTRACTOR SHA C INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE PROTECTION APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL IMMEDIATELY. BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 45(? 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL 3.09 TEMPORARY DIVERSION DIKE. SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OFA DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM U PSLOPE DRAINAGE AREAS ZONING ORDINANCE SECTION 5.1.28. AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPOR RILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL OR RETAIN SEDIMENT ON 5 SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY BE LIMITED TO THE HOURS OF 7: OOAM TO 9: OOPM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PROPER MAINTENANCE PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE. J. 13 TEMPORARY SEDIMENT TRAP: 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A TEMPORARY PONDING A R TO PERMANENT STURMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS CONTROL (MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT BE AT 75 LBS/ACR'-:, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A MAY BE CONSTRUCTED El ER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO DIVERSION DIKE CONSIST OF ANNUA'_ RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. TEMPORARY SEDIMENIT BASIN: STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO _3.14 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE APPROVED( BY THE COUNTY EROSION CONTROL INSPECTOR. FORMED BY CONSTRUCTIN6 AN EMBANKMENT OF COMPACTED SOIL ACROSS A 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND DRAINAGEWAY. TO DETAIL_ SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE 10OOLBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT BE APPLIED AT 18OLBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED IMPOUNDMENT. AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 318 OUTLET PROTECTION: 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE CONCENTRATED STORMWATER FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND COLLECTINIG SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED ENGINEERED "HANNEL77ONs ENGINEERED CHANNEL SE,770NS. IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED 3.19 RIPRAP: WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE SUBJECT 70 APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE 21. THIS PLAN! SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.) RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION, AND TO STABILIZE SLOPES 22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) W177-1 SEEPAGE PROBLEMS AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER WATER INTERFACE AND P -IE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, PROTECTION ORDINANCE SECTION 17-2078) F-XPECTED VEGETA TI VE COI VER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITTONS.I THE ESTABLISHMENT OF AI TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTA77ON BY DTABILIZ/NG 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-SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCT70N UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 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 SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. 3.38 TREE PRESEKVA II UNI ANL) PKU I L G' IIUN: PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTR✓1CTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL 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 ACTI VI TIES. 3.39 DUST CONTROL: REDUCING SURFACE AND �/R 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 HEAIIN 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. 2C- ALBEMARLE FINE SANDY LOAM - 7% TO 15% SLOPES. SOIL CONSISTS OF C EEP, WELL DRAINED SOILS. SURFACE RUNOFF IS MEDIUM TO LOW WITH MODERATELY HIGH PERMEABILITY. HYDROLOGIC SOIL GROUP'C'. 21B - CULPEPER FINE SANDY LOAM - 2% TO 7% SLOPES. SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM WEATHERED FROM META-ARKOSIC SANDSTONE. HYDROLOGIC SOIL GROUP'S'. 39D - HAZEL LOAM -15%TO 25% SLOPES. SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM WEATHERED FROM GREYWACKE SANDSTONE. HYDROLOGIC SOIL GROUP 'B'. Isaaw,d cion lnixt#inn ¢salrua . tnr vrosiorl control Plxams I f a y ¢ . -... i ,P -LAB t A erartsarfrio %t at Ea tail!of t r;p:la sa,wt tw iik_A i d Wudi .k "61iaa lm,4 1 nich li:Alo; 0' Izatt+fS.'{a.tk� a ,.ttlrlrls'tar_ ,e .�,r<It Iz.: w ��sita a ak;ssaacfca int i F iasalca:� t as .a.Ir�jssat� aaata,t bt Cmiiv"' ,aw,as boil] the raasa,aaas>U k)mg alal:a 7vecll ttLisat;ase. d n t�ataE_t� C-ilal.ticaLt. Ji sc.€arascub �I&ialti~: gss:.:etsRaat ir+ataz eatiE-tctta=:<r[rraasaaSsaiatx.<iati.ttc:#-,fs ,vai«ci«crs:>es. PAVED WASH RACK .DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES: IT IS ANTICIPATED THAT A CONSTRUCTION ENTRANCE, TEMPORARY DIVERSION BERMS, RIGHT OF WAY DIVERSION, A SEDIMENT BASIN, OUTLET PROTECTION, AND SILT FENCE 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 ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. 3.01 SAFETY FENCE - SAFETY FENCE WILL BE INSTALLED AROUND THE PROPOSED SEDIMENT BASIN. 3.02 CONSTRUCTION ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT THE EXISTING DRIVEWAY ON DUNLORA DRIVE. THIS WILL BE THE ONLY POINT OF INGRESS AND EGRESS TO THE SITE. CARE WILL BE TAKEN TO PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT. 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF DISTURBANCE WHERE NOTED ON THE PLANS. 3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE PERIMETER OF SITE DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF TO ON-SITE SEDIMENT CONTROL FACILITIES. 3.13 TEMPORARY SEDIMENT TRAP- TEMPORARY SEDIMENT TRAP WILL BE INSTALLED WHERE SHOWN ON THE PLANS. 3.14 TEMPORARY SEDIMENT BASIN- TEMPORARY SEDIMENT BASIN BE INSTALLED WHERE SHOWN ON THE PLANS. 3.18 OUTLET PROTECTION- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE PIPES WHERE SHOWN ON PLANS. 3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE SHOWN ON THE PLANS. 3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS, 3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.38 TREE PRESERVATION AND PROTECTION- TREE PRESERVATION FENCING SHALL BE INSTALLED WHERE SHOWN ON THE PLANS. NO TREES SHALL BE E LIMITS OF TREE PROTECTION FENCING. HARMED OUTSIDE OF THE P C 3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT THE SITE WHERE SHOWN ON THE PLANS. STORMWATER MANAGEMENT: STORMWATER RUNOFF OFF Q U UANTITY WILL BE TREATED WITH ONE LEVEL II BIORETENTION BASIN WITH DOWNSTREAM DETENTION. SEE STORMWATER MANAGEMENT PLAN SHEETS. MAINTENANCE.• IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON-SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQIIIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS: a.SEDIMENT BASINS WILL BE CLEANED AND MAINTAINED IV ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b.ALL INLET PROTECTION AND GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVEEP AND CLEANED, OR IT WILL BE REPLACED. c.ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARI.Y FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON-SITE. THE CONTRACTOR WILL BE DETERMINED AT THE TIME THE CONTRACT IS AWARDED. IN ADDITION THE: DEVELOPER MAY BE CONTACTED. UPON COMPLETION OF THE PROJECT, THE OWNED WILL BE RESPONSIBLE FOR SITE MAINTENANCE. 1. SET POSTS AND EXCA VA TE A 4 "'X4 " TRENCH UPSLOPE ALONG THE LINE OF POSTS. a�a�v SF T' i1.' FENCE ��C'1s P• RSP,T!VE VIEW FERSPECI T VIEW PLASTIC F I &CE stuufec: Asap-lcld f.,nn Conwed kl au;c ,ci Y€Or i Pr R'SPE "I FF. VI V,'' +.t+_ rAl_ l l H E m 1.a.. +.01--1 PURPOSE: THE PURPOSE OF THIS LAND -DISTURBING ACTIVITY IS TO GRADE THE SITE FOR THE FUTURE DEVELOPMENT OF DUNLORA - 33 LOTS. THE TOTAL ACREAGE TO BE DISTURBED WITH THIS PLAN IS 6.57 ACRES. EXISTING SITE CONDITIONS: THE EXISTING SITE IS A WOODED, SLOPING PARCEL WITH AN EXISTING RESIDENCE AND OUTBUILDINGS. THE SITE IS GENERALLY WELL DRAINED WITH PRESERVED AND MANAGED STEEP SLOPES. EROSION AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE EXISTING SITE SLOPE AND PROTECT THE PERIMETER STREAMS AND ADJACENT PROPERTIES. ADJACENT AREAS: THE SITE IS BOUNDED TO THE WEST BY DUNLORA DRIVE AND TO THE SOUTH BY RIO ROAD EAST. IT IS BORDERED BY RESIDENTIAL LAND AND TWO CREEKS TO THE NORTH AND EAST. OFFSITE LAND DISTURBANCE: NO OFF-SITE LAND DISTURBANCE IS PROPOSED. CRITICAL AREAS: MANAGED STEEP SLOPES TO BE IMPACTED. STREAMS AND BUFFERS TO BE PROTECTED. WOODLAND/OPEN SPACE PRESERVATION AREAS TO BE MAINTAINED AND PROTECTED WITH TREE PROTECTION FENCING. SOILS: SEE SOILS BOUNDARIES ON THE EROSION AND SEDIMENT CONTROL PLAN SHEET, AND DESCRIPTIONS ON THIS SHEET. SEQUENCE OF CONSTRUCTION: 1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. 3. CONTRACTOR SHALL IDENTIFY THE LIMITS OF DISTURBANCE AND INSTALL TREE PROTECTION FENCING WHERE INDICATED ON THE PLANS BEFORE ANY SITE DISTURBANCE SHALL TAKE PLACE. CONTRACTOR SHALL ENSURE THAT TREES TO BE SAVED ARE FLAGGED ALONG THE LIMITS OF CLEARING AND PROTECTED. 4. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH RACK AS SHOWN ON THE PLANS. 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. INSTALL THE WASH RACK UPHILL FROM THE PROPOSED SEDIMENT BASIN. ACSA WILL DETERMINE THE APPROPRIATE METHOD OF SUPPLYING THE WASH RACK. PARKING AND CONSTRUCTION ENTRANCE AREAS SHALL BE CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJECTIONABLE MATERIALS BEFORE CONSTRUCTION ROAD STABILIZATION IS INSTALLED. 5. CONTRACTOR DOES NOT HAVE PERMISSION TO CLEAR CUT THE SITE PRIOR TO INSTALLING THE PERIMETER MEASURES AS SHOWN ON THE E&S PLAN. CONTRACTOR SHALL EXPEDITE INSTALLATION OF THE PERIMETER EROSION AND SEDIMENT CONTROL MEASURES AND PROTECT THE SITE WITH THE LEAST AMOUNT OF TREE REMOVAL NECESSARY TO INSTALL THESE MEASURES. INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHEETS. THIS INCLUDES THE SEDIMENT TRAP, THE SEDIMENT BASIN, SILT FENCE, AND DIVERSION BERMS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, BERMS, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS ,A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSILOPE LAND DISTURBANCE TAKES PLACE. 6. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE (PHASE I EROSION CONTROL PLAN. 7. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION CONTROL PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS. 8. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE II EROSION CONTROL PLAN. 9. 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. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN CONVERT THE SEDIMENT BASIN INTO THE PERMANENT STORMWATER MANAGEMENT FACILITY. NO E&S ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAMS ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 12. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE INO 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 PERMANENiTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 2. STAPLE WIRE FENCING TO THE POSTS. SIL T FENCE e(WITH WIRE SUPPORT) NO SCALE 3 ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. FLOW 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SH, Sb TOTAL LBS GENERAL SLOPE (3:1 OR LESS) PER ACRE KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS 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. OPS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) 1492 338 T' 'NUV; t1ND 4.,RAft9R1,A£G TABLE 3 39�A TABLE 3.32-11 `�(vl` ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS' IRP L'p,E, f Rate Plan2ina Dates S Leleslbs. acre_ Sept. I - Feb. 25 50150 Mix of Aunual Ryegrass No,'1 l,ls re i wo00 L0lalliil ffi41I11-{tal ural 50 - 100 �t - \-.. LDieC dEPtLF Cereal (Winter) Rve CORRECT METHODS OF TREE FENOINr E (Sscale cereals) I Feb. 16 - Apr. 30 Annual Rvegrass 60- 200 o"wilut�, �„6L- arurnj 4:1 May "I - Aug 31 German Millet 50 Acrylic 1`:inidsifm fSstaria italics} Source: Va. DSWC; Source: yr r)S"><k'C Plate 3.38-2 TOTAL LBS GENERAL SLOPE (3:1 OR LESS) PER ACRE KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS 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. OPS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) 1492 338 T' 'NUV; t1ND 4.,RAft9R1,A£G TABLE 3 39�A `�(vl` AI)IJESIVES USED i^CSR. DUST /' "`max` 1 '•. `"P" IRP L'p,E, f 4 I A IDihaluan I)yp-, Of Rate 00 No,'1 l,ls re i wo00 Amari"c �t - \-.. LDieC dEPtLF i,i CORRECT METHODS OF TREE FENOINr E r,, I I n`Tf r Fine Spray u Rc,i 1 in Water 4:1 Fine Spray 3(w) Acrylic 1`:inidsifm ' r CORRECT TRUNK ARMORING j TRIANGULAR BOARD FENCE I+I Source: yr r)S"><k'C Plate 3.38-2 ATTACH FIL TER FABRIC TO STAKES OR POSTS & EXTEND IT INTO TRENCF EXCAVATED Si BACKFILLEDA. COMPACTED DEN STAKE CPOST TH = 5'MIN. SIL T FENCE sF (WITHOUT WIRE SUPPORT) 3Za5 2 NO SCALE ONSHAL OW SLOPES, STRIPS NE�TECTIVE COVERINGS MAY BE APPLIED ACROSS BERM THE SLOPE. - WHERE THERE IS A BERM AT THE TOP OF THE SLOPE BRING THE MATERIAL OVER THE BERM AND ANCHOR I7` I - I F I =111-111- BEHIND 111-11IBEHIND THE BERM. I I I II II�H II I ' III- 11=11 I -I I I� I I- I� I I--i�l 111=111=111 1' Tfi=1 =1 =�- 4" BRING MATERIAL DOWN TO A LEVEL AREA BEFORE STEEP TERMINAT11VG THE INSTALLATION,, TURN THE END SLOPE UNDER 4 ' AND STAPLE AT 12 INTERVALS. ARLLLARCOFCO COVERING LOTHED PROTECTIVE OF USE CHECK SLOTS AS REQUIRED, AVOID JOIN/NG MATERIAL IN THE CENTER OF PR IECT/VE Cil EKING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. THE DITCH IF AT ALL POSSIBLE. II- ' �IIIII _- _ I; '17W . 1TI�TII� Tl gIM SOIL STABILIZATION BLANKET NOTE TREATMENT 1 SOIL STABILIZ477ON MATTING MATERNAL SHALL BE INSTALLED AS NOSCALE REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR SCOTT R. COLLINSZ ti Lie. No. 035791,E TABLE 3 39�A AI)IJESIVES USED i^CSR. DUST CONTROL \Ntaacer Applic;alim IDihaluan I)yp-, Of Rate 5s 4._wa+Yu) No,'1 l,ls re Amari"c Asphalt Emulsion i,i 0);aa5c Sprays 1,200 Lwe . Ism..;WWL 12.5:1 Fine Spray 2-35 Rc,i 1 in Water 4:1 Fine Spray 3(w) Acrylic 1`:inidsifm (Non -Traffic) :1 Coarse Splay 45(? Arylsc I_i:astai„irsi I (Traffic) a[iic) 3.5.1 Caiw4t Spray :3% .�iaurc,'.: ve, Dswc, ATTACH FIL TER FABRIC TO STAKES OR POSTS & EXTEND IT INTO TRENCF EXCAVATED Si BACKFILLEDA. COMPACTED DEN STAKE CPOST TH = 5'MIN. SIL T FENCE sF (WITHOUT WIRE SUPPORT) 3Za5 2 NO SCALE ONSHAL OW SLOPES, STRIPS NE�TECTIVE COVERINGS MAY BE APPLIED ACROSS BERM THE SLOPE. - WHERE THERE IS A BERM AT THE TOP OF THE SLOPE BRING THE MATERIAL OVER THE BERM AND ANCHOR I7` I - I F I =111-111- BEHIND 111-11IBEHIND THE BERM. I I I II II�H II I ' III- 11=11 I -I I I� I I- I� I I--i�l 111=111=111 1' Tfi=1 =1 =�- 4" BRING MATERIAL DOWN TO A LEVEL AREA BEFORE STEEP TERMINAT11VG THE INSTALLATION,, TURN THE END SLOPE UNDER 4 ' AND STAPLE AT 12 INTERVALS. ARLLLARCOFCO COVERING LOTHED PROTECTIVE OF USE CHECK SLOTS AS REQUIRED, AVOID JOIN/NG MATERIAL IN THE CENTER OF PR IECT/VE Cil EKING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. THE DITCH IF AT ALL POSSIBLE. II- ' �IIIII _- _ I; '17W . 1TI�TII� Tl gIM SOIL STABILIZATION BLANKET NOTE TREATMENT 1 SOIL STABILIZ477ON MATTING MATERNAL SHALL BE INSTALLED AS NOSCALE REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR SCOTT R. COLLINSZ ti Lie. No. 035791,E s; ' y..'r ti , r:: ,F:. SEDIMENT BASIN #:L SCALE: SEDIMENT TRAP #i SCALE: 1"=20' CONCRETE WASH OUTAREA WASH RACK o.& WIDE STONE AT ELEV 466.5o x ---- m� x )N AF ;Sediment Basin #1 Design .drainage area (acres) 'basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) 402.00 610.0 404.00 1617.0 406.00 2749.0 408.00 3998,0 410.00 53490 412.00 6800.0 Wet storage: wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (min. 34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> V) dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (ariflce+2") runoff: C (use 0.45 for bare earth) tc (ruin) I 2yr 4.0 0 2yr I 25yr 6.0 Q 25yr principle spilNWa� available head (ft) diameter riser (in) spillway capacity, Op (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankri-ent (ft) dian-eter of barrel (in) OF EMCKEWY SPiLLWAY 355.8 design high water (ft) MIN, 1' A/ `_i P" LUVAY 406,9 top of dam (ft) 'x421 Etch 5` 31 DESIGN HIGH WATER 8,0 volume (cy) e, -EV.) 402.00 405.3 approx bottom dimensions: 12'xl 12' 0 upstream face slope: 2:1 79,5 downstream face slope: 3:1 355.8 baffles: DRY STORAGE 409.67 OFWATERING 2.439 420.0 effective width, We (ft) 46 487.8 wv I STQR-,GE 2.88 6.0 832.8 .0 2:1 collars: YES depth of water at spillway crest (ft) 7.67 1281.7 slope of upstrearn face (Z 1) 2:1 10.8 slope of barrel (Sb) 5mmq� �LEANOVT FQW7 WET STOPAGE REDUCE)I. 13.8 length of barrel in saturated zone (Ls) 48,61 1,0 4 C,Y./ A.CRE) number collars required OF EMCKEWY SPiLLWAY 355.8 design high water (ft) 411.00 406,9 top of dam (ft) 412.00 355.8 top width of darn (fl) 8,0 180.5 bottom of basin (ft) 402.00 405.3 approx bottom dimensions: 12'xl 12' 1,68 upstream face slope: 2:1 5VR CLOM downstream face slope: 3:1 355.8 baffles: NO 409.67 length of flow, L (ft) 134 420.0 effective width, We (ft) 46 4.0 L I We (baffles not required if > 2) 2.88 6.0 slope of wet storage sides 2:1 collars: YES depth of water at spillway crest (ft) 7.67 0.65 slope of upstrearn face (Z 1) 2:1 10.8 slope of barrel (Sb) IM% 13.8 length of barrel in saturated zone (Ls) 48,61 22.8 number collars required 2 468 dirriension of collars 4,4'x4.4' 1.00 emergency spjillway-, YES 24 required capacity (Q25-Qp) (cfs) 7.8 15,00 bottom width (ft) 33 36 slope of exist channel (ft/ft) 33% 75 minimum length of exit channel (ft) 17 10,67 crest of spfliway (ft) 410.67 15 (NOCNAL CREST or STONE WEIR "A, 467,00 519.0 15�5 R1 STORACE 468.00 736.0 38.7 5VR CLOM wet storage: wet storage required (cy) (67*DA) 6.7 ,5�1 >A .1.9,5_= COA-RE AGaiEGAIE CLA,5 1 Rpp';51 bottom of stone weir (ft) 466.5 wet storage provided at this elevation i 7.8 slope of wet storage sides 2:1 weir length (ft) (60A) 0.6 dry storage.- bottom of trap elevation (ft) 466 dry storage required (cy) (67*DA) 6.7 bottom trap dimensions, 9OX40' crest of stone weir 41671,1101. top of dam elevation (ft) 468 dry storage provided at this elevation 1 7.7 top width of dam (ft) 4 slope of dry storage sides 2:1 to try dimensions 17'x48' / �NH °P/ 0- P /� (4 -!;SCOTT R. COLLINSZ 0 C-) Lic. No. 035791,E D.A. 'A' Pre -Development Impervious Areas (Water Quantity) Existing Structures 5,328 sf Existing Drive & Walkways 12,532 sf Total = 17,860 sf D.A. 'A' Pre -Development Pervious Areas (Water Quantity) Existing Woods 87,115 sf Existing Grass 76,650 sf MANAGED SLOPES F77-7PRESERVED SLOPES j` STREAM BUFFER , �'• ., - r f 1N H'LE'1 10/ \ 1 in [ u , I ,TH op O SCOTT R. COLLINS' ?, U Lic. No. 035791 .1�_ li�O �INSIIOXAL LU J � O U �J c :::, fl J U 0 W Z7■ 5 6 z iY w w z 0 z w (10 z 0 0 4- 0 Q) 0 c O U C N 3 U) O X N O O t .3 07 O O U C O U L O O C O UU 7 -Fs"+ O U O O E O C O U) 7 U C N N O U 6 N O ®—� Li.� A d j ; A c O L . • O 0 Q% D L U O C O C O i Q C O N 1. L O 3 ,� . • J U y U 0 O Ug L a 0 0 o c 0 E ,��rr 1.+L 0 ).0 c� z iY w w z_ C� Z w z J 0 0 U Y 3 O T L d 0 0- > N U X N N N i JO U ~ a0 LU w s.0 U CL{� Op 122071 O N SCALE 0 v 1"-3a' 0 a 7 U) STORMUVATER MANAGEMENT FACILITY 'A' DETAIL (SCALE OF 1"=30') BIORETENTION BASIN CONSTRUCTION NOTES: ---- _ ', �,� \ t'• FACILITY PLANTING SPECIFICATIONS: I \ ', \ ` 1, 1. ROOT STOCK OF THE PLANT MATERIAL SHALL BE KEPT MOIST DURING TRANSPORT FROM THE SOURCE TO THE JOB SITE AND UNTIL PLANTED. -- - r. - `" 2' ;DEEP OREBAY,W(z 1 `' `� 2. WALLS OF PLANTING PIT SHALL BE DUG SO THAT THEY ARE VERTICAL. .. }. _. SIDE SCORES . \ .\ THE DIAMETER OF THE PLANTING PIT MUST BE A MINIMUM OF SIX INCHES (6") LARGER THAN THE DIAMETER OF THE BALL OF THE TREE. a. ;� 3. . \ 4. THE PLANTING Pl r SHALL BE DEEP ENOUGH TO ALLOW 1/8 OF THE OVERALL DIMENSION OF THE ROOT BALL TO BE ABOVE GRADE. LOOSE SOIL AT THE BOTTOM OF . . / /` r " � THE PIT SHALL BE TAMPED BY HAND. .. {; ( \ j, 1 Wu'ID'E FOREBAY TOP OF DAM `' 5. THE APPROPRIATE AMOUNT OF FERTILIZER IS TO BE PLACE AT THE BOTTOM OF THE PIT (SEE BELOW FOR FERTILIZATION RATES). 1 ° \ 2 6 MOVED FROM THE CONTAINER AND PLACED IN THE PLANTING PIT BY LIFTING AND CARRYING THE PLANT BY ITS BALL (NEVER LIFT BY ___ - __ ,'' ' / ) =,424.00' W/1o� WIDE FOREBAY THE PLANT SHALL BE R r ANCHES OR TRUNK) E ELV SPIL uVAY CREST ELEV: 4z3 oo'I 7. SSET THE PLANT STRAIGHT AND IN THE CENTER OF THE PIT SO THAT APPROXIMATELY 1/8 OF THE DIAMETER OF THE ROOT BALL IS ABOVE THE FINAL GRADE. i \ ,.. . -, q \,. 8. BACKFILL PLANTING PIT WITH EXISTING SOIL. ` 1o'WC�EA C�R SP 'LW CR '' i ; h 9. MAKE SURE PLANT REMAINS STRAIGHT DURING BACKFILLING PROCEDURE. ,f' � ,4 .� 10. NEVER COVER THE TOP OF THE BALL WITH SOIL MOUNT SOIL AROUND THE EXPOSED BALL. -. _. ,. EL =4 :oo' R IS. AB E - ,. I 6 \ \ R ( ) x` 11. TREES SHALL BE BRACED BY USING T BY 2' WHITE OAK STAKES, STAKES SHALL BE PLACED PARALLEL TO WALKWAYS AND BUILDINGS. STAKES ARE TO BE EQUALLY QFI ERT R• RE, NG A I _ � SPACED ON THE OUTSIDE OF THE TREE BALL. UTILIZING HOSE AND WIRE THE TREE IS TO BE BRACED BY THE STAKES. M IMG POI N ER OF lar' " /,, 1)- ° - If \ 12. BECAUSE OF THE HIGH LEVELS OF NUTRIENTS IN STORM WATER RUNOFF TO BE TREATED, BIORETENTION BASIN PLANTS SHOULD NOT REQUIRE CHEMICAL TOP D EL .=4 00 > _ ' PV o sf) ° ' c s I VEL='fl, Bl FILTER CELL FERTIuzATION. -- i I ; =: -i 1 r - 5-@JRFACEE Ey "yza.oa I :-"�`�� i CONTRACTOR RE UIREMENTS: SEE PLANT SC REDtILEFORSPECIFICPLANTSPECI "5 f yr �s �.:, Q i (3) / `. - _ CHED.ULfi;40 PERFORATE,D.PV61, r; .`, 4 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. f 1 S L EFER TO HE STANDARDIZED LANDSCAPE SPECIFICATI ONS FORTHE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE R R N 1 A I M P I.N G 2. LANDSCAPE CONTRACTOR HAL R T _._ I N DE D Al 'S o M X MU SAC r OSE OUT S E IFICATIO S { (CATIONS ON THE PLANS SHALL SUPERSEDE TH LINED IN THE P C N �" i L L BIDE BY US CONTENTS- HOWEVER ANY NOTES OR SPECIE __..... .' ' " °�•` '' .', ,. CONTRACTOR SHA L A , W!�(i. CLEANO T5; SHALL BE INSTALLED c s vl s , " I 1 ; ' AL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITE T , RGINIA NURSERYMEN / TH'RCiUGHOUTJiE BIOFILTE, R IN THE; ) ,,._ . -�. %` 1 S. ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). r %:, % _ v I .;` f i< ER STONE LRYEi. UN) }ERDRAINS, 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY E i _... 1 / �I SH LL BELQPED TO DRRIAILCLT {ESfifaR ; STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. ' S'T. UCTURE OR �Q DAYLIGI T INTQ THE 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. r t `"' �L, 1 ' 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY � ',"I D ENTION CELL & IAL A.VE A 1z' r ,' �:_ ; `, , S ONE SUMP.LOCATED B�LCsriTH INVERT I' NATION. PRbPQSED 6' MAX -HT. WAL -' -''> O+THE UNDERDRAI 5 ED slrE INFOR t' 6 REFER TO TTHE APPROVED FINAL SITE PLANS FOR ANY DETAIL _.y, � 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. W/HAN I i 1-1 _ . - - - "' 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, S TENS, OR OVERALL SHAPE OF THE - ) - !, - , 'i "`% �`F---- ;L �. _�/ -.'� .,.. k- --?-- I' : :-�'� ,'.'B'N:-� 'I . ' STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE BEEN GROWN. _ :__-: PROPOSED PJz` " CL.•lpl RCP'STAND _. :,. 1 - ': 4 ,. 9. ALL PLANT MATERIAL, UNLESS O fHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, - -- - , ' PIPE W 4' \ r MC (2 TRASHRAC, K5,5 ALL SERVE•AS THE RISER VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTA"TION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM fl. '' t: os STRUCTURE. RI ER:STRUC ' �, W L BE REJECTED. TURE RIM TRANSPLANT SHOCK OR VISIBLE WILT PLANTS DEEMED UNHEALTHY IL , _,-O 10 Os ELEV.- 0 6 WX ONE (1};',(2 "°LQViI-FLOW 10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS ( 4 9 7 5 >•" t. SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. �. - -. _ R F E w I E T E EV. 'o a O l I� NVR z / 0. 4 _ C BY THE CON rAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND ` _ q, i 11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTE TED ", ,, ,_ i 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 WHH r-_��V % " : + I ;'.' MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PLEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. - " t .-. ;:, , \ rr': _._..._ : r' }.;:#' . :r : I UST BE APP �+ 2.1 _ .1"" 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS M ROVED BY THE DESIGNER. r ', ', ; ,.._, - `vl 13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX. ROOTBALL AND UTILITY CONFLICT) MAJOR ADJUSTMENTS MUST BE APPROVED BY �" t.... " THE DESIGNER. I' ' I 14. NO PLANTING SHALLOCCUR WHEN THE SOIL IS FROZEN. \ I 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. -._ i':, 16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90'% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND \ \ \ \ z I REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. ~ ` -. �', TRASH AND DEBRIS WITHIN THE LIMITS OFTHE PLANTING ON A DAILY BASIS. , \ ' - - 18 HE CONTRACTOR WLL NONBEBRES ONSIBLOFOR PNANT MOATERIALTHAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE . T 17 T ' .� \ - ._ F -.:_<I CONTRACTOR'S CONTROL. (, ' Ci` --, '=_, "! 19. THE CONTRACTOR SHALL CONTACT THE WATER RESOURCES INSPECTOR AND COLLINS ENGINEERING 24 HOURS PRIOR TO BACKFILLING THE BIOFILTERS AND REQUEST PROPOSED DETENTION CELL -=? - I I I , r - .} } ! AN INSPECTION AND APPROVAL OF THE UNDERDRAINS INSTALLATION AND THE SOIL MIX. ' , \ \ `` - i - i - =1'- 20. THE BIOFILTER PLANTING AREAS SHALL BE COVERED WITH HEAVY STRAW MULCH TO A DEPTH OF 3" IMMEDIATELY AFTER PLANTING. } - .. __ .i __Lj III ..._ t �> < -,._, _ ... _ } FACILITY CONSTR(JCTION \ RC)POSEDr ' WIDE GRASS: LINED ':' �" I ___ I I' 2. BIORETENTION AREAS SHALL BE FULLY PROTECTED BY SILT FENCE OR CONSTRUCTION FENCING, PARTICULARLY IF THEY WILL RELY ON INFILTRATION. `` p 33.. - i ~ ID j IDEALLY, BIORETENTION SHALL REMAIN OUTSIDE THE LIMIT OF DISTURBANCE DURING CONSTRUCTION TO PREVENT SOIL COMPACTION BY HEAVY EMEIYGENC,Y SPILLWAY W/5;1 S E \ ` \ D AS SMALL SEDIMENT TRAPS OR BASINS DURING CONSTRUCTION. HOWEVER, THESE MUST BE m. � 'SLOPES' - EST EIEV,AT1OW-416.67', _ . ..... \ `. r.;- ._, ... AQCCOMPANI D BY NONESOAND GRAPOH CAD OAILS ON THE E&s PLAN SPECIFYING THAT: (H TOP- CADAM ELEV. 412.00'} ` A. THE MAXIMUM EXCAVATION DEPTH AT THE CONSTRUCTION STAGE MUST BEAT LEAST 1 FOOT ABOVE THE POST CONSTRUCTION INSTALLATION, AND \ ti - . B. THE FACILITY MUST CONTAIN AN UNDERDRAIN. THE PLAN MUST ALSO SHOW THE PROPER PROCEDURES FOR CONVERTING TIHE TEMPORARY SEDIMENT } � CONTROL PRACTICE TO A PERMANENT BIORETENTION FACILITY INCLUDING DEWATERING CLEANOUT AND STABILIZATION. PROPOSED 015"! CL. III RCP ` , 0 . . . G DRAINAGE AREA HAS BEEN ST L ED LTH VEGETATION. z. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTIN ABI IZ W • - J BARREL (75L'F, S-1.33%; R INLETS WHILE THE BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHALL BE ' `^ \ \ ? INU. IN -401.00', . ` \ CI ECI< BD OR EXSSTRNGOUTILOTIES PRIOR TO aNB OR O VIATION. INU. OUT- OO.O, 1 I 1 3. THE DESIGNER AND THE INSTALLER SHALL HAVE A PI2E-CONSTF'UCTION MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA AND 4 ) �< c;, THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO THE ORIGINAL DESIGN. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE .._ .- _....__ \ 4 \i , CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER. SINCE OTHER CONTRACTORS MAY BE RESPONSIBLE FOR y. l_r _. CONSTRUCTING PORTIONS OF THE SITE, IT IS QUI1 E COMMON TO FIND SUBTLE DIFFERENCES IN SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT "'`' �" , ,, �` - i" ``- v.'' - } - RAL CONTRACTOR SHALL CLEARLY COMMUNICATE ,. _ CAN PRODUCE HYDRAULICALLY IMPORTANT DIFFERENCES FOR THE PROPOSED BIORETENTION THE GENE }. NG TO THE INSTALLER AND THE PLAN REVIEW INSPECTION -) NY PROJECT CHANGES DETERMINED DURING THE PRE -CONSTRUCTION MEET( !� -..� IN WRITING \ -.. _ a i AUTHORITY. A ',` . . - � 4. TEMPORARY E&S CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE BIORETENTION AREA TO DIVERT STORMWATER AWAY FROM THE BIORETENTION ^�, _ - _ AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE NEEDED TO PROTECT VULNERABLE SIDE . . . . .. . . . . . . ^- . t .' SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS. PROPOSED VDOT EC -1 CLASS Al ` 1. ANY PRE-TREATMENT CELLS SHALL BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS. EXCAVATORS OR BACKHOES SHALL WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS. OUTLET PROTECTION w/ GEOTEXTILE `�, EXCAVATING EQUIPMENT SHALL HAVE SCOOPS WITH ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION AREA. FILTER FABRIC UNDERLAYMENT (L=8', , .\ ,, l CONTRACTORS SHALL USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO Soo TO 1,000 SQ. FT. W1=4.5', W2=9.5; D=1.4' MIN.) -- - - -- . . TEMPORARY CELLS WITH A io-zs FOOT EARTH BRIDGE IN BETWEEN, SO THAT CELLS CAN BE EXCAVATED FROM THE SIDE. ,` - 3. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 1z INCHES TO PROMOTE GREATER INFILTRATION. THIS REQUIREMENT WILL BE - DICTATED BY THE INSPECTOR, PRIOR TO INSTALLATION OF THE REMAINDER OF THE FACILITY. 4. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6 -INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE USED, BASIN NOTES: PLACE THE APPROPRIATE DEPTH OF #57 STONE ON THE BOTTOM, INSTALL THE PERFORATED UNDERDRAIN PIPE, PACK #57 STONE TO 31NCHES ABOVE THE 1. STA TE APPROVED TRASHRACI<S�SHALLBEINSTALLEDONALLORIFICEOPENINGS. UNDERDRAIN PIPE, AND ADD APPROXIMATELY3INCHESOFCHOKERSTONE/PEA GRAVEL ASAFILTERBETWEENTHEUNDERDRAINANDTHESOILMEDIA z. A CONCRETE FOUNDATION SHALL BE INSTALLED ON THE RISER AS SHOWN & MEETING THE MINIMUM SPECIFICATIONS SET FORTH IN THE VESCH SPEC. # 1 LAYER. IF No sroNE sroRAGE LaYER Is usED START WITH 61NCHEs OF #57 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERINGAS DESCRIBED 3. 4• ABovE. 3. CONTRACTOR AND CONSTRUCT( N SHALL ADHERE TO ALL OSHA REQUIREMENTS. ADDITIONALLY, SPECIAL ATTENTION SHALL BE GIVEN TO THE CONSTRUCTION 5- DELIVER THE SOIL MEDIA FROM AN APPROVED VENDOR, AND SORE IT ON AN ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. APPLY THE MEDIA IN SHORING ASSOCIATED WITH THE BIORETENTION BASIN EXCAVATION. 1z -INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAITA FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TO ACHIEVE THE DESIGN ELEVATION. 6. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALL THE VEGETATION, AND WATER ACCORDINGLY. INSTALL ANY TEMPORARY IRRIGATION. 7. PLACE THE SURFACE COVER IN BOTH CELLS (MULCH, RIVER STONE OR TURF), DEPENDING ON THE DESIGN. IF COIR OR JUTE MATTING WILL BE USED IN LIEU OF _ MULCH, THE MATTING WILL NEED TO BE INSTALLED PRIOR TO PLANTING (STEP g), AND HOLES OR SLITS WILL HAVE TO BE CUTIN THE MATTING TO INSTALI ��7 THE PLANTS. i THE LANDSCAPING PLAN AND WATERTHEM DURING WEEK S OF NO RAIN FOR THE FIRST TWO M ONTHS. 1 + i 8. NSTALL THE PLANT MATERIALS AS SHOWN IN I I g. CONDUCT THE FINAL CONSTRUCTION INSPECTION (SEE SECTION g.2). THEN LOG THE GPS COORDINATES FOR EACH BIORETENTION FACILITY AND SUBMIT `A G DATABASE. /{ I THEM FOR ENTRY INTO THE LOCAL MAINTENANCE TRACKIN 435 I FACILITY MAINTENANCE: I ! 1' WIDE FOREBAY TOP OF AM ' THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION: i ' 1. FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHALL BE INSPECTED BY THE CONTRACTOR AT LEAST TWICEAFTER STORM EVENTS THAT EXCEED \ ELEV - 2 0o W(10 WID 4 4 - --_ .. - .. t _ _._ _. . -- i... _ _.I. ..... _ _. _✓ ._ .......---. ......--- :-- 1/z INCH OF RAINFALL. i- 2. THE CONTRACTOR SHALL LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA OR AROUND THE BIORETENTIO)N AREA, AND MAKE SURE (ELEV.-4?3.00 I i THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER. CONTRACTOR SHALL SPOT RESEED AS NECESSARY. FGRE AY SPILLWAY CRE T I ONE-TIME SPOT FERTILIZATION MA Y BE NEEDED FOR INITIAL PLANTINGS. 3 i O O i 43 PRI - OBER DEPENDING ON LNG THE FIRST GROWING SEASON A L OCT 4 \ � t G 5 EDED ONCE A WEEK DURING TFIE FIRST z MONTHS AN D THEN AS NEEDED DUR ( ); 3 I 4. WATERIN I NE _ ... _2.I_D.EEP - - - ............... I- ----. ............ - -- - -- --.... -- - - -- -- PROPOSE i LEVEL IF;BIOFILT IR CELL RawFALL. FORERAY W/z: Fj SURFA E ELEV.= __ ____ S. REMOVE AND REPLACE DEAD PLANTS. SINCE UP TO H T VE THE PLANT STOCI( MAY DIE OFF IN THE FIRST YEAR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE SIDE SLO ES I I CLEANOUT, Sl `E ( VIVES DURING THE FIRST Gfi20WING SEASON FOLLOWING 4 CARE AND REPLACEMENT WARRANTY TO ENSURE THAT VEGETATION IS PROPERLY ESTABLISHED ANU SUR DETAIL FOR! I I I CONSTRUCTION. THE TYPICAL THRESHOLDS BELOW WHICH REPLACEMENT IS REQUIRED ARE 85%SURVIVAL OF PLANT MATERIAL AND l00% SURVIVAL OF TREES. _._... _ ---. _.__ .. G IS A LIST SOME OF THE I<EY ADDITIONA r 6. A SPRING MAIN TENANCE INSPECTION AND CLCANUP SHALL BE CONDUCTED AT EACH BIORETENTION AREA. THE FOLLOWIN OF PROPOSE ! GRADE ; INFORMATION. (�YP.) p' WIDE A MORED $PILLWA I i MAINTENANCE PROBLEMS TO LOOK FOR: CREST ELE.=4z3.004, CREST 1 A. CHECK TO SEE IF 75%TO go%COVER (MULCH PLUS VEGETATIVE COVER) HAS BEEN ACHIEVED IN THE BED, AND MEASURE THE DEPT H OF THE REMAINING 4 2\ I 1z ABOWE BIOFILTER TOP I 4 25 MULCH. __ - _ _____ __._ - _ -_ __ .--___,_._.__.. _h __.___- __- .._ _ _.._ __ ______--______ ____ B. CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTINIG INTO THE BED, AND CHECK I LAYER, CR ATING A MAXIMUM ( FOR OTHER SIGNS OF BYPASSING. PONDING DPTH OF z" (TOP ! F ! C. CHECK FOR ANY WINTER- OR SALT -KILLED VEGETATION, AND REPLACE IT WITH HARDIER SPECIES. DAMELEV.=4214.00' I D. NOTE PRESENCE OF ACCUMULATED SAND, SEDIMENT AND TRASFI IN THE PRE-TREATMENT CELL OR FILTER BEDS, AND REMOVE IT. ! I Y \ I I CT BIORETENTION SIDE SLOPES AND GRASS FILTER STRIPS FOR EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT. --..._!_. _.... ..---_.__._ °------ E. INSPE 1 i ----' __.._. " ' I I j F. CHECI<THE BIORETENTION BED FOR EVIDENCE OF MULCH FLOTATION, EXCESSIVE PONDING, DEAD PLANTS OR CONCENTRATED FLOWS, AND TAKE i - _ ! i APPROPRIATE REMEDIAL ACTION. FLOOR ELEV.= FLOOR ELEV.= - ( I ; G. CHECK INFLOW POINTS FOR CLOGGING, AND REMOVE ANY SEDIMENT. 420 422.00' 422:00' - \ I 4.20 H. LOOK FOR ANY BARE SOIL OR SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND STABILIZE THEM IMMEDIATELY. I I. _ - ------------�---.----- ----�- --- ---------- G SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR OTHER CAUSES OF CHECI<FORCLOGGEDORSLOW DRAININ ' OF -STAT AP PR DED S6I+ _ _ - j I INSUFFICIENT FILTERING TIME, AND RESTORE PROPER FILTRATION CHARACTERISTICS. IVIED( .SIDE SLOPC I \ i ( T FOR A LIST OF THE OWNER'S ANNUAL LONG-TERINJ MAINTENANCE ACTIVITIES AFTER THE CONTRACTOR's RESPONSIBILITI F -S HAVE BEEN COMPLETED, I EXCAVAfiION NEED NOT B - - I V ERTICAL - -- - - MINIMUM PEA G AVELLAYER 3 - 3 - - NI \ ti R` 1 45 1z MINIMUM C RAVEL SUMP? I ELEV. 1 ! 12rr 4 4 75' >•P ED LEVEL z MIN. EPTH PRO O,S ( ) 1 I BIOI�ETE?NTION BASIN - . - - ----- .... .-.. _ _ -- _, - . 6" SCHEO ULEIl40 PERFORATED PVC UNDERDR INS, 10 I MAXIIYIUM SPACING WITH CLEANQUTS, SH I LL BE 410 INSTALLEC THROUGHO�JT THE BI©FILTER I1 THE � I ' LZ1WR STONE CAYER.�j NDERDRfNS SFIAL�BE - -- --'- -- SLOPED TO DRAIN TO THF~ RISER STRUCTUR OR TO ' ^% DAYLIGHT INTO THE DETENTION CELL & SHAL HAVE _A 12 STONE SUMP LOCATED BELOW THE INVERT OF-_ THE UNDERDRAINS. 4.05 -- ---... ---..-- ____ _ _. ..... FLOOR EL V I 40 .00' f� 00 1 -- ! - --- -----'---------r-- -- ---- __ -- r - _ __.____.. I i TO PREVENT FLOTATIOIN THE RISER BASE I ANBD BARREL CONNECTION SHr LL BE FIRMLY EMBED ED 6 INTO ARE(-p-�1FORCEC 18" THICK CONCfRETE FOUNDATIO THAT I. I 4 x 4', AND IS BURIED BELOW THF LIMITS 395 ( OFTHIE BASIN CRADING.� 392 ROPOSED 024 CL� Ill RCP STANDPIP w( R_ ASHRAKS_SHALI SERVIE AS THERI. -ER I - .. __._. STRUCTURE. RIS RSTRUCTURERII EV.= o r6 ' W ON 1 O LOW -FLOW / ( ) 4 9 : 7 5' E w INERT E _ ORIFIC FLED W I 4 1 I 45 PIROPOSED 3 ' WIDE G I ASS I LIMED EMERG NCY SPI LWAY WY/5:1 SIDE S OPES C EST iELEVATI N=410.6 ' (8' TOP OF DAP ELEV. = 42.00') _ _. _. -W ---__ ___._ -..� -__ - I------- 410 :,. Y I Annual Maintenance Activities for Bioretention �fi .,naitCe TeF ICS � I re uen Q ...'Sf r 3 r 1 w� 1 � F "� 7- � P �'? #IFf CGVBf �v'I�I �t ras f[t.r_,in _ane [or.,i ntl�nt. # Iv t � .t I l` r ' P At :G,i SE 4 .Iral€?_� cl �` �3r e Sp_i-A i ceding, erosion rep air, trash, renicval, and mulch rakincl Twice dLIPTIrg ,trOWirig SetiSCM « Add reinfor on ent p�rlanting to. maintain desired the vegetation CO c9eP1 iTj As tic. -e Rd rI ds t�'serYlir°>/� invasive pl_�Ilzts� u��inq reccanJrriende� c,enira. [t�setdTsa_i_, N • :t rbiiize the contributing drainage :area to prevent erosi„rl LU LLJ Sp_rring Inspection send cleanup et Sut pfen-iota mulch to maintatin a :� Inch layer Annually • F'I`Une trees and shrubs N - ReiT ove. Sediment Sn p"lre-treatment cells and Inflow pClint�' Once' every 2 to � years r r' -'se IBf , the nTuici"S lEtyp Ev-F°y' 3 yOiTIS EX STING i FACILITY INSPECTION: I CONSTRUCTION INSPECTIONS ARE CRITICAL TO ENSURE THE BIORETENTION BASINS ARE PROPERLY CONSTRUCTED AND ESTABLISHED. BECAUSE THE TIMING OF THE GADE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO -. \_-____ I---___ m . __p 4O5 INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER AND INSPECTOR, DURING THE PROPOSE VDOT E -1 CLASS FOLLOWING STAGES OF THE BIOFILTER CONSTRUCTION PROCESS: \ ' Al OUTLET PROTE ION w/ GEOTEXT LE FILTER ABRIC 1. PRE -CONSTRUCTION MELTING \ _ ADERLAYMENT (L=8'�W1=4,5', z. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) W2=9. D=1.4' 111 IN.) 3. EXCAVATION/GRADING (E.G., INTERIM/FINAL ELEVATIONS) I 4. BIOFILTER INSTALLATION (E.G., MICROTOPOGRAPHY, SOIL AMENDMENTS, STONE BEDDING, UNDERDRAINS AND STAKING OF PLANTING ZONES) 5. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT) /, 00 6. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) I V `t PLEASE ALSO SEE ABOVE, UNDER FACILITY MAINTENANCE #6, FOR REQUIRED INSPECTIONS. 'ROPOSED 0-is'� CL. III (RCP BARRE (75LF, S=1.3302/o; INV. IN=4o1.00', INV. OIUT 400.00' W W M 8,881 cf .t 11,101 cf N O CO 1,685 cf r� 3,821 sf N 3,823 sf LU LLJ fNM1 et M ,4 428 N 3,167 N rte{ N QO 4,450 15,560 412 5,906 25,882 y w `.. Ski. LU L� h_._ i x 10+00 I 10+5o 11+00 11+50 12+00 12+50 PROFILE SCALES "_S' (v) BASIN 'A' 1"=So' (H) 395 392 13+00 13+25 EMBANKMENT NOTES: THE EMBANKMENT SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON THIS SHEET. 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. _. i r .;i i.: .I t,,I I ti t.,"� ,4 -- 0 i IJ :, _r `,r II ('': t.. a.. „I, .-E '.7-� t, X ....e ., -. I ;.., i .. i . C 1 r I ( @ fi i , .�_-.{ 1µ v BIORETENTION BASIN'A' (LEVEL II) DESIGN & REQUIREMENTS: Treatment Volume (Per VRRM Calculations) 8,881 cf Minimum Treatment Volume Required 11,101 cf Minimum Forebay Volume Required (15% of Tv) 1,665 cf Forebay Volume Provided 1,685 cf Minimum Surface Area Required (Tv/Storage Depth) 3,821 sf Surface Area Provided 3,823 sf STORMWATER MANAGEMENT FACILITY GRADING 1,685 4, 3 !.,_4 ) I t l i" I - I (Ij._ .._...... I Ori riff trenc -. bel l #' g i Prik .. fii EMBANKMENT .. r � �vsau�. 3`' �I �� fi �� DTI' PRAT' Iw in SwA w" �r� a E HIMNE RAIN ' rUnst i X11) Rock o� rave a. •� Jii°`a,:I2Sa?dkt'�1�� LIci1FiP�rxt� rJ" <- 6' Mix at 25% porosity; 3" pea gravel at 2% porosity, 12" stone at 40% porosity & 12" of ponding at 100% porosity Area of COMMON NAME Elevation Forebay Cell Volume (ft) Contours (sf) (cf) 422 578 0 424 1,138 1,685 426 717 693 428 1,845 3,167 430 3,096 8,055 4, 3 !.,_4 ) I t l i" I - I (Ij._ .._...... I Ori riff trenc -. bel l #' g i Prik .. fii EMBANKMENT .. r � �vsau�. 3`' �I �� fi �� DTI' PRAT' Iw in SwA w" �r� a E HIMNE RAIN ' rUnst i X11) Rock o� rave a. •� Jii°`a,:I2Sa?dkt'�1�� LIci1FiP�rxt� rJ" <- 6' Mix at 25% porosity; 3" pea gravel at 2% porosity, 12" stone at 40% porosity & 12" of ponding at 100% porosity Area of COMMON NAME Elevation Detention Volume Elevation Cell Contours Volume (ft) (sf) (cf) 402 81 0 404 717 693 406 1,845 3,167 408 3,096 8,055 410 4,450 15,560 412 5,906 25,882 4, 3 !.,_4 ) I t l i" I - I (Ij._ .._...... I Ori riff trenc -. bel l #' g i Prik .. fii EMBANKMENT .. r � �vsau�. 3`' �I �� fi �� DTI' PRAT' Iw in SwA w" �r� a E HIMNE RAIN ' rUnst i X11) Rock o� rave a. •� Jii°`a,:I2Sa?dkt'�1�� LIci1FiP�rxt� rJ" <- 6' Mix at 25% porosity; 3" pea gravel at 2% porosity, 12" stone at 40% porosity & 12" of ponding at 100% porosity BIORETENTION BASIN A LANDSCAPING SCHEDULE SYM Area of Filter COMMON NAME Elevation Cell Contours Volume (ft) (sf) (cf) 422 3 823 0 424 4,906 8,707 426 4x � c 11,N"�.�.�� � '; 428 I I C 1 I i. �,.. ASI 430 FI_Q'vV BIORETENTION BASIN A LANDSCAPING SCHEDULE SYM BOTANICAL COMMON NAME SIZE SWM FACILITY QUAN PITY COVERAGE (sf) PERENNIALS/HERBACEOUS SC SCIRPUSCYPERINUS WOOLGRASS 100 J C JUNIPERUS CHINENSIS & CVS. CHINESE JUNIPER 10510 PV CU VI G U PAN I M R AT M SWITCHGRASS - 60 SHRUBS MC MYRICA CERIFERA WAX MYRTLE 2-1/2" CAL. 2 IG ILEXGLABRA INKBERRY 2-1/2"CAL. 6 TREES BN BETULANIGRA RIVER BI C R H " C 2 AL. 1 AR ACER RUBRUM RED MAPLE 2-1/2" CAL• 1 LS LIQUIDAMBAR STYRACIFLUA SWEETGUM 1-1/2" CAL. 3 = Storri1Ra - ROUf�ID SERIES TRASH RACK CONCRETE MANHOLE STANDARD W INCH RAC& SHOO\'N DIMENSI S IN INCHES r' d -."'.t FLA9TICaY i Rocs. air rI drip" r� ,t. r PIa5tIC �OtIutICleiS, WIG. GdS OfdER ° PO Box 4356, i14ndv, Uc , VA. 21,f M ,[177) 571.5727 phohe ?f6 T_ ,.... I ) 7Z2 -u 19 £u€' ittt wt - lasQc�s Luo.,._ ATER E T OAP VF HIRE C�ROSSISRACINCFOROVERHANG i HOPE ANTI -VORTEX €LATE DATE: APsr: DSAIL: n r-.,= �.C, G�• •7E. s r. ._: ris I P=-F0R,A D GPI = ��.+' l n'3,yiT' z.S f �w. i" ro�" x way?Xrut? trz y', i 4 r� ,. ! 1 ) R __..__. .,.�;' 4x � c 11,N"�.�.�� � '; ' 6 't iV' ' I I C 1 I i. �,.. ASI 11 FI_Q'vV 4 PEn t R,TFO �C H 4J � EfI. F V U UNDr-11 iFIIV a , f t y w `.. Ski. h_._ i x :..`:. 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