Loading...
HomeMy WebLinkAboutWPO202000048 Plan - Revision 2020-12-07MILL CREEK INDUSTRIAL LOT 11 GENERAL NOTES OWNER 076M 1-00-00-01100 1205 STONEY RIDGE LLC 107 SANDRA AVE GREENOLLE, SC 29611 ENGINEER COLLINS ENGINEERING 200 GARRETT ST. SUITE K, CHARLOTTESOLLE, VA 22902 TELEPHONE (434)293-3719 FAX (434)293-2813 CONTACT MR. SCOTT COLLINS, P.E. scot t0collins-engineering. com TAX MAP NO. 076M1-00-00-01100 (D.B. 4715/ PG. 155) PLAT (DB.1342, PG.238-247) AREA 1.35 AC ZONING PUD - PLANNED UNIT DEVELOPMENT WITH PROFFERS (ZMA-1995-00019 & ZMA-1996-0021), (Ali AIRPORT IMPACT AREA, AND MANAGED SLOPES OVERLAY DISTRICT. SETBACKS FRONT BUILDING & PARKING: 10' MINIMUM SETBACK SIDE BUILDING SETBACK: BUILDING SEPARATED PER BUILDING CODE REAR BUILDING SETBACK. BUILDING SEPARATED PER BUILDING CODE BUILDING HEIGHTS MAXIMUM BUILDING HEIGHT: 65' (FLOORS ABOVE 40' OR THE THIRD STORY SHALL BE STEPPED BACK A MINIMUM OF 15' FROM THE FRONT OF THE BUILDING). PROPOSED BUILDING HEIGHT. • ONE STORY BUILDING - 25' HEIGHT PROPOSED USE 2,000 SF BUILDING. PROPOSED USE OF BUILDING IS FOR STORAGE/WAREHOUSING/DISTRIBUTION/TRANSPORTATION AND OR INDUSTRIAL OFFICES. FLOOR AREA TO LOT COVERAGE RAT70= 2,000sf/1.35 ACRES = 0.03 WATERSHED THIS DEVELOPMENT LIES WITHIN THE MOORES CREEK WATERSHED. THE SITE IS NOT LOCATED WITHIN A PUBLIC WATER SUPPLY RESERVOIR WATERSHED, IT IS LOCATED DOWNSLOPE FROM THE SOUTH FORK RI VANNA WATER SUPPLY WATERSHED. TOPO & SURVEY TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SURVEYOR ROGER W. RAY & ASSOCIATES, LLC, DECEMBER OF 2015. THE SITE WAS FIELD VERIFIED IN MARCH, 2020 BY COLLINS ENGINEERING. BENCHMARKS ARE SHOWN ON THE EXISTING CONDITIONS SHEET DATUM ELEVA77ONS ARE BASED ON STATE PLAIN GRID- NAD 83 DATUM. EXIS77NG VEGETATION THE SITE IS FORESTED, WITH SOME EXIS77NG AREAS THAT HAVE BEEN CLEARED. STEEP SLOPES IN ACCORDANCE WITH THE ALBEMARLE COUNTY STEEP SLOPES COUNTY MAPPING, MANAGED' STEEP SLOPES EXIST ON THE PARCEL. 774E MANAGED SLOPES ARE SHOWN ON THE EXISTING CONDITIONS SHEETS AND OTHER VARIOUS PLAN SHEETS. PHASING THIS PLAN WILL BE CONSTRUCTED IN ONE PHASE. FLOODPLAIN/WPO BUFFERS THERE ARE NO 100-YEAR FLOODPLAINS OR WPO BUFFERS LOCATED ON THIS SITE PER FEMA MAP PANEL 1151003CO288D DATED FEBRUARY 4, 2005 & COUNTY GIS, RESPECTFULLY. ALSO NOTE THE PARCEL IS OUTSIDE THE LIMITS OF THE FEDERAL & STATE DAM BREAK INUNDATION ZONES PER COUNTY GIS DATA. BURIAL SITES NO CEMETERIES WERE FOUND DURING FIELD INVESTIGATION OF THE SITE. SITE ACCESS THE SITE ACCESS FOR THE PARCEL IS PROVIDED VA STONEY RIDGE ROAD, WHICH CONNECTS TO SOUTHERN PARKWAY. RETAINING WALLS. • RETAINING WALLS PROVIDED ON THE GRADING SHEET IN THE FINAL SITE PLAN. MAXIMUM RETAINING WALL HEIGHTS SHALL NOT EXCEED 10. LIGH77NG. THE PROPOSED LIGHTING PLAN IS SHOWN ON THE LIGHTING PLAN IN THE FINAL SITE PLAN. EACH OUTDOOR LUMINAIRE EQUIPPED WITH A LAMP THAT EMITS 3,000 OR MORE INITIAL LUMENS SHALL BE A FULL CUTOFF LUMINAIRE AND SHALL BE ARRANGED OR SHIELDED TO REFLECT LIGHT AWAY FROM ADJOINING PROPERTIES AND AWAY FROM ADJACENT ROADS. THE SPILLOVER OF LIGHTING FROM LUMINAIRES ONTO PUBLIC ROADS AND ADJACENT PROPERTIES SHALL NOT EXCEED ONE-HALF FOOTCANDLE. LANDSCAPING. A LANDSCAPING PLAN IS PROVIDED WITH THE FINAL SITE PLAN IN ACCORDANCE WITH ALBEMARLE COUNTY ORDINANCE SECTION 32.7.9, SEE SHEET 5. STREET TREES SHALL ALSO BE INCLUDED WITH THE LANDSCAPING DESIGN TO INCORPORATE STREET TREES EVERY 40' ALONG THE ROADWAYS. TRASH COLLECTION. AN ENCLOSED DUMPSTER SCREENED WITH LANDSCAPING IS PROVIDED IN THE FINAL SITE PLANS. ADJACENT PROPERTY OWNERS. • SEE EXISTING CONDITIONS, SHEET 2. UTILI77ES• EXIS77NG WATER AND SEWER UTIL177ES ARE LOCATED ONSITE AND WITHIN THE ADJACENT RIGHT OF -WAY AND CONNECTIONS ARE PROPOSED. STORMWATER MANAGEMENT. TWO DRY DETENTION BASINS ARE PROPOSED TO MEET MINIMUM STORMWA TER QUANTITY REQUIREMENTS. A NUTRIENT CREDIT PURCHASE WILL BE COMPLETED PRIOR TO THE ISSUANCE OF A GRADING PERMIT TO MEET MINIMUM WATER QUALITY REQUIREMENTS. SEE THE STORMWATER MANAGEMENT PLAN AND CALCULATIONS FOR DETAILS. MAXIMUM EMPLOYEES. • 17 EMPLOYEES AT LARGEST SHIFT BUILDING SEPARATION: BUILDING SEPARA7ION SHALL BE IN ACCORDANCE WITH TABLE 401 FIRE RESISTANCE RA77NGS OF STRUCTURE ELEMENTS OF THE BOCA BASIC BUILDING CODE, 194 EDITION OR ITS EQUIVALENT IN THE CURRENT EDITION OF THE BOCA BASIC BUILDING CODE. IMPERVIOUS AREAS. • PROPOSED BUILDING 2,000 SF PROPOSED CONCRETE 1,745 SF PROPOSED PARKING LOT 14,225 SF STONEY RIDGE IMPROVEMENTS 4,075 SF EXIS77NG GRAVEL 476 SF EXIS77NG PAVEMENT & CONCRETE 3.712 SF TOTAL IMPERVIOUS AREA 26,233 SF (0.60 AC.) PAVED PARKING & CIRCULAT70N AREA: 14,225 SF OPEN SPACE AREA: 0.75 ACRES PARKING REQUIREMENTS PARKING REQUIRED. 1 SPACE PER 500sf OPEN TO PUBLIC FOR CUSTOMER PARKING (MINIMUM OF 2 SPACES REQUIRED) + (1) SPACE PER EMPLOYEE 1 SP/500sf x 200sf = 2 SPACES + 1 SP/EMPLOYEE x 17 EMPLOYEES = 17 SPACES TOTAL REQUIRED = 19 SPACES PARKING PROVIDED: 19 PARKING SPACES (THIS INCLUDES 1 HANDICAP SPACE) + 11 LOADING SPACES VSMP PLAN (WPO 202000048) SCOTTSVILLE MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA O / oIT C� co NOTES: CONTRACTOR SHALL VERIFY LOCATION AND ELEVATION OF ALL UNDERGROUND UTILITIES SHOWN ON PLANS IN AREAS OF CONSTRUCTION PRIOR TO STARTING WORK. CONTACT ENGINEER IMMEDIATELY IF LOCATION OR ELEVATION IS DIFFERENT FROM THAT SHOWN ON THE PLANS, IF THERE APPEARS TO BE A CONFLICT, AND UPON DISCOVERY OF ANY UTILITY NOT SHOWN ON THE PLANS. THE CONTRACTOR MUST LOCATE ALL SURFACE AND SUB -SURFACE UTILITIES PRIOR TO ANY WORK ONSITE. ANY SIDEWALK AND/OR CURB DAMAGE IDENTIFIED IN THE SITE VICINITY DUE TO PROJECT CONSTRUCTION ACTIVITIES AS DETERMINED BY THE VDOT INSPECTOR SHALL BE REPAIRED AT THE CONTRACTOR'S EXPENSE. SIDEWALK WILL BE REPLACED AT THE DIRECTION OF THE VDOT INSPECTOR. ANY EXISTING SIDEWALK THAT IS CURRENTLY DAMAGED AND IN NEED OF REPAIR OR NOT IN COMPLIANCE WITH CURRENT STANDARDS SHOULD BE REPLACED AS PART OF THIS PROJECT AS WELL. IN ADDITION, ANY EXISTING CG-12S ALONG THE PERIMETER OF THE SITE SHOULD BE UPGRADED TO MEET CURRENT STANDARD IF NEEDED. ALL SIGNING AND PAVEMENT MARKINGS SHALL BE CONSISTENT WITH THE MUTCD. CONTRACTOR SHALL OBTAIN ENTRANCE PERMITS FROM VDOT PRIOR TO CONSTRUCTION. SHEET LAYOUT SCALE: 1" = 30' F Bb Ship Center aloe Ridge nv P Blue Bidg Juvenile b 4o�,S p�F Cetrn40n,.. as SITE �9 0 s d alm�,y: vaw::iae +' SOUTHERN Fezbady Sd,aalV pa Of Sooth.nPk„y n,em vrwr PARKWAY a z` s ,r+ z` c.oty: ui ' ael�v� E a oc P 'n c, M/r Bing R xor �n n 214`ORnTn C]OE.04m5MW rp VICINITY MAP SCALE: 1" = 500' Sheet List Table Sheet Number Sheet Title i COVER z EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 4 PHASE I EROSION & SEDIMENT CONTROL PLAN 5 PHASE II EROSION & SEDIMENT CONTROL PLAN 6 PHASE III EROSION & SEDIMENT CONTROL PLAN 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT CALCS & DETAILS 8 TOTAL NUMBER OF SHEETS LEGEND ROADS L-� EXISTING CULVERT CULVERT 0 DROP INLET & STRUCTURE NO. CURB CURB & GUTTER PROPOSED PAVEMENT EC-3A DITCH 6" DEPTH OF EC-3A DITCH EC-2 DITCH 6 DEPTH OF EC-2 DITCH _... .... EARTH DITCH DRIVE WA Y CUL VERT + BENCH MARK _ _ _ _ _ CLEARING LIMITS T VDOT STANDARD STOP SIGN - - - -200- - - - EXIS77NG CONTOUR 20o PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVAT70N TBC DENOTES TOP/BACK OF CURB TIB DENOTES TOP OF BOX l..i Lic. No. 035791,a 12/4/20 ,Qi 0 N O N z J a 0 � a m U Z cn w Z o a O 0f z O o J a N a V1�� zLU w a v' W w TWOS Gn ti CM M N ® M i N 0 WCY) N N W> LJJ J J U) LU z T_ w ' LU Ul LU ZLU � U) J~ W J !< V C:) C:) N G i T� O < w LL 0 V ) ZD z �1 LU Y LU LL U J HI w J U ~ w O w ac = a U) JOB NO. 202179 SCALE AS SHOWN SHEET NO. 1 � T.M. 76M1-20 / NOTES: / I / LOT 10 1. TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SURVEYOR AT ROGER W. RAY & j,TH 0 3 MCV L / ASSOCIATES, INC. IN DECEMBER OF 2015. THE SITE WAS FIELD VERIFIED IN MAY 202o BY F� / 6 °2 22 D•B• 34 -3 6 / COLLINS ENGINEERING. p ��_ 4 / D.B.184 -28o / PAVED a.°°' Ex1s G WATER METER / 2. THERE ARE NO too YEAR FLOODPLAINS OR WPO BUFFERS LOCATED ON THIS SITE PER FEMA L=54.4 0 NG: P \ 0 COTT R. LLINS Z. / I 3 I T-30.28 MAP PANEL #51003CO288D DATED FEBRUARY 4, 2005 & COUNTY GIS, RESPECTIVELY. ALSO O �-, C 5�1.82t LOCATI OFWATE LI U : MO R 'S i L) Lic. No. 035791,'n CBgT17S°o538"E \ EASEME D.B.z- ) ELECT C L & / NOTE THE PARCEL IS OUTSIDE THE LIMITS OF THE FEDERAL & STATE DAM BREAK INUNDATION EXISTIN FIRE A=22°08'29" MEC AN L / I / / ZONES PER COUNTY GIS DATA. °po 12/4/20 �4 EXISTING PRO ERTY HYDRANT ALVE R=2o5.00' / \ s Cs1 3 L=40.58. IRO �BOUNDAR V / SIGNAL E� IRON T 20.54 FOUN FOUND C =40.32' CB=S6203756"E / / _. ..... 4 M M QP / CONCRETED He M , I V OUT- 2.49 / ry RON Q� FOUND , � 3 R 47.43 °3 � / " � 25' GAS LINE EASEMENT T=17;52, o / / �' (D.B. uzo-z24) / - C=32.85' aD°j- IRON CB=N250oo'So"E cy � RAINAGEE�EMENT � s � � 4=qo°o754" /CD 3 / (D.B. 28y8-z78) \ R=23o.00' / / o / c.� L=92.o6' / \ / / T =47 49' ^� C=89.22' CB=S3e29'45"E ti / I EXIS NGACSA�"DIPWAT RLINE IRON X '� \ / FOUND- No— (((��� / / \ z T.M. 76M1-21 / / 0 Lu - — / DR/INAGEEASEMENT I / / E, p PARCEL II / a p — _ 1q0 -722, 242 & D.B. I / / I 1 n ��a�A 11 PAVED / APS D BR1999 352� LLC / i — — — — / � z _ 1� D.6.11o2-724 THRU 72g PLA� / o ZONING: PUD / / zo > o USE: CHARLOTTESVILL5 / �..� u, J / k, I / / EXISTING CATCH BASIN AUTOMOTIVE w / (� EXISTING ACSA 8" DIP /WATE/ NI 3 i600 // I / / / z°u L-8.TOP= 475.o8 aT=94,94 V EISTINGLARDAL PKNAIINV OUT=473.o6 85g' pFOUNDC= CB=N27°03'59"E Q / w s W Lu ce EXISTING �TREELI;NE (MIOFTGCIN / �Fu— — 24"RCP TOP- 448.8,li,, E�ERGR�EN & DECIDUOUS TREES) oo------ INV IN=4 INVOU�445-56 '" 50' ROW Q �/ 4 LOCAL THE TE � ETHE UNDERG UNDERGROUND �i L \ EECOMMUNICATIONS \ I EXING DIRT PILES 1 / r 1 S�VIC\ / / / / / / LU N N 1 3 QQ\ r N O � II � �/ 25'VIRGINIAELECTRICAND W 0-- Z T.M.76M1-3a POWER COMPANY EASEMENT /0 m a // REVISED PARCEL 1 , PAVED (D.B.2633-700) 1205 STONEY RIDGE LLC �o D.B. 5344/416i 3 PLAT ZONING: BUD Lu EXISTINGNJATER co LATERAL AND METE BOXTO BEABANDONED / PAVED / / / / d / EXISTING CATCH8A51N S / � 1 � NAIL CA EXISTING SANITARY / 3 ENV IN444o849 \ I y FO D I / / / G SEWER MANHOLE / 9999 TOP=477-54 - / % EXISTING / INV IN=4g6.2g / 1 �� A3 N V / INV IN=469.84 / ///SSS BLUE PAINTED INV OU'7( 449-45 METAL ROD H� / /EXISTING PROPERTY / / \ a L,k / / INV OUT=469.52 / 5 J\\ BOUNDARY \ / ISTING 5\w \/ / ---EXISTING SEWER '/ z,p �� / Ti / \ / LATERAL STUB OUT 2oSEWEREASEMENT ,U. Lu MANHOLE / / TOP=455-92 IRON o (D.B.2329-33) '0 +� T.M.76M1-22 INV IN=452.76 FOUND - - „� \ �` _ ' / a is -� / PARCEL 12 Cn / / --- INV OUT=450-43 \ / / \ 1 a \ ✓ THE BARTLETT REALTY COMPANY, INCORPORATED / / > z \ J EXISTING /\ zg„ zo' DRAINAGE EASEIwENT� F D.B. i3.o5-590 ® LLI O Q / THE ON ACTOR SHALL / WATER \ RCp (D.B.22oz-7zY \ 9s F� LC AT TH UNDERGROUND METER \ _ i EXISTING MA GED / EXISTING GUARDRAIL D.B.11oz-724 THRU 729 PLAT / / F— J / �T LE MMUNICATIONS / \ ST PSSLLOPES \ 's I ��n ZONING: PUD / �--� / 5 VI 5 ALONG THE SITE / 5 FRONTAL EXISTING8"D.I.. o= s,°S32'°3 USE: BARTLETT TREE EXPERTS, COMMERCIAL / Q J 0 SAN YSEWER MAIN` \ / / RL 6.gs NAIL cAP / / J z EXISG STORM IG1H T=3 .qg' Fo �D / / / Q Q "'P=4/3-45 C=A6',0' Q H4 3 0 \ GRAVEL A \ INV IN=462.4o cB=s2a°22'a9 E EXISTING DI / < 4\ TOP=Soz.zoINV OUT= / Ur INV IN=492.24 - 0 INV OUT=492.2 0 z cJ I LLj X Lu ° H \ v / // �\ V EXISTING ACSA IP WATERLINE ' ��' / / W 3 GRAVEL'—, zo' SEWER EASEMENT \ ul / / \ / N EXISTING SANITARY �P BENCHMARK: LL.I SEWER SERVICE LATERAL ° 5 �/ / LLJ ui \ , \ / � ELEEVATIONS508.38 / T. M- 76M1-12 S / 3 ALL THINGS PAWSSIRLE, INC. / \ \ s & D _ / / CO D.B. 344-39 &- 7oPLAT / A \ �',� 2a°2a'2 / / % \ R- o.00 / /3ZO IN 394 / \ - x' ON °o� =248 ' / / J / 3 ZONING: PUD -39' / / USE: DOG DAY CARE CENTER \ 490 wnu A €b(h5T1NG SANITARY / � SEWER -MANHOLE �L� CB= a'' 339 / SEMANHOLE RONSET / TOP-09.92 ° INV IN 478.42(LATFRAt-- a / INV IN 8. o EXISTING WATER VALVE/ (� 47 39 � r INV OUT 478.36 °s , / — 3 A / 54 �8s6 -� 25' GAS LINE EAS ENT TIBLOCG CK ALLS �� 'ETE� .9 � �_,,.;_� m � /9 / � (D.B.22zo-n4) NAILCAP GRAPHI SCALE EXISTING CONCR TE 20 / 0 10 20 40 so BLOCK ALL s w Lu w ( N FEET d a PAVED S i in h = 20 ft. JOB NO. T.M.76M1-12A 202179 LOT 1 / \ EXISTING SAN J ARY FSOB, LLC _ SEWER MANHOLE SCALE D.B.3618-642 TOP28.33 / D.B.3535 621& 622 PLAT INVOUT= 3.98 1 —20 ZONING: PUG �' / / USE: MILL CREEK PROFESSIONAL BUILDING sNL2 No. EROSION & SEDIMENT CONTROL EROSION CONTROL NOTES DESCRIPTION OF EROSION & SEDIMENT MEASURES: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE CONTROL MEASURES: PRE -CONSTRUCTION CONFERENCE ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN DISTURBING ACTVITY AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND EROSION AND SEDIMENT CONTROL MEASURES., STRUCTURAL PRACTCES USED IN THIS SECPON CONSIST OF THE FOLLOWING MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA IT IS ANPCIPATED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION, EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATONS VR DIVERSIONS, SEDIMENT TRAPS, AND SILT FENCES TO CONTROL SURFACE DRAINAGE. 3.01 SAFETY FENCE 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AC77Vl77ES. TEMPORARY STOCKPILE AREAS ARE NOT BE REQUIRED WITH THIS PROPOSED APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE 4. AS THE FIRST STEP IN CLEARING. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE DESIGN. SHOULD FIELD ADJUSTMENTS NECESSITATE A SMALL STOCKPILE AREA, IT SHALL CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC. MAINTAINED ON THE SITE AT ALL TIMES. BE DISCUSSED WITH THE ESC INSPECTOR AHEAD OF TIME. THE STOCKPILE WILL NEED TO 3.02 CONS7RUCT7ON ENTRANCE 5. PRIOR TO COMMENCING LAND DISTURBING ACTIW77ES IN AREAS OTHER THAN BE MAINTAINED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON A STABILIZED CONS7RUC77ON ENTRANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO OFF -SITE BORROW OR SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONS7RUCTI0N ENTRANCES SHALL CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AND WHERE CONSTRUC7ON AC77WTIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED AUTHORITY. ONTO PUBLIC ROADWAYS. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADDITIONAL EROSION BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR 303 CONS7RUCT7ON ROAD STABILIZATON., CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA77ON AS MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. THE TEMPORARY STABILIZAPON OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, Y AN APPROVING Y. DETERMINED TH B E PL VIN A 0 G AUTHORITY. 0 TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT AND OTHER S/7£ VEHICLE 7RANSPORTA 770N ROUTES 1N7H STONE IMMEDIATELY AFTER 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED W/7H FAST GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AT ALL 77MES DURING LAND DISTURBING AC77W77ES AND DURING SITE DEVELOPMENT GERMINATING VEGETAPON IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTON DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF UNTIL FINAL STABILIZATION IS ACHIEVED. OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. PERMANENT ROADBEDS BETWEEN THE TIME OF 1NI77AL GRADING AND FINAL STABILIZATION. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, WHETHER FILTERING DEVICE. PERMANENT OR TEMPORARY, FOR USE BY CONS'TRUCPON TRAFFIC 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY 3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PARTICULAR AREA. 305 SILT FENCE: AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR 3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO A TEMPORARY SEDIMENT BARRIER CONSISPNG OF A S)IV 7HEPC FILTER FABRIC STRETCHED CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. ACROSS AND ATTACHED TO SUPPORTING POSTS AND EN7RENCHED, TO INTERCEPT AND 10. BE MADE IMMEDIATELY. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 3.03 CONSTRUCTION ROAD STABILIZA PON - TO REDUCE THE EROSION OF TEMPORARY DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERAT7ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT - - 774E VELOCITY OF SHEET FLOWS AND LOW TO MODERATE LEVEL CHANNEL FLOWS 774E SILT SHALL BE INERT MATERIALS ONLY FREE OF ROOTS STUMPS WOOD RUBBISH AND , REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF INITIAL GRADING AND FINAL FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO OTHER DEBRIS. STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION CONTRACTOR PARKING &STAGING AREAS AS NEEDED. INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE PER ZONING ORDINANCE SECPON 5.1.28. VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SEC77ON 13-301 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. OF THE CODE OF ALBEMARLE. 3.07 STORM DRAIN INLET PROTECTION- INLET PR07EC77ON IS PROPOSED ON INLETS, 3.07 STORM DRAIN INLET PROTEC770N 14. BORROW, FILL OR WASTE AC77WTY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT WHERE SHOWN ON THE PLANS. 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 SHALL BE LIMITED TO THE HOURS OF 7.• 00 AM TO 9: 00 PM. 3.09 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS PRIOR TO PERMANENT STABILIZA77ON OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES 15. BORROW, FILL OR WASTE AC77WTY SHALL BE CONDUCTED IN A SAFE MANNER THAT TO DIRECT RUNOFF INTO A SEDIMENT TRAPPING DEVICE. WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, 3.13 SEDIMENT TRAP- SEDIMENT TRAPS ARE PROPOSED WHERE SHOWN ON THE PLANS. STABILIZA71ON OF 7HE CORRESPONDING DISTURBED DRAINAGE AREA. PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 3.18 OUTLET PRO TECTON-OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF PIPES 309 TEMPORARY DIVERSION DIKE., 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR 3.19 RIPRAP- RIPRAP IS PROPOSED AROUND THE EXISTING DI. A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE 3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE PLAN. AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET TO SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING 17 TEMPORARY STABILIZATON SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING 3.38 TREE PRESERVATION AND PROTECTION- TREE PROTECTION IS PROPOSED WITH THIS FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON S17E DURING CONS7RUC77ON. THESE S7RUCTURES GENERALLY HAVE A CONSIST A 50/50 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH 3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER AND APR/L TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF MAINTENANCE. GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS110OSF. ALTERNATIVES MAINTENANCE.' 3.11 TEMPORARY RIGHTDIVERSION: ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. IN GENERAL, DURING CONSTRUC770N THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL OIL OR LOOSE ROCK OR GRAVEL CONS7RUC7E0 ACROSS A RIDGE OF COMPACTEDD SOIL I& PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND ERGS/ON AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS TO SHORTEN 7HE FLOW LENGTH MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS11000SF, RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC WITHIN A SLOPING RIGHT--OF-WAY, THEREBY REDUCING THE EROSION P07FN77AL BY INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT ATTENT70N WILL BE GIVEN TO THE FOLLOWING ITEMS DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING aSEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTION TRAFFIC WITHIN 774E SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95X KENTUCKY 31 OR TALL WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. RIGHT-OF-WAY. GRAVEL .STRUCTURES ARE MORE APPLICABLE TO ROADS AND 07HER FESCUE AND 0-5% PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS b.ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC. TO BE APPLIED AT 80LBS/10OSF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY 774E PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL J..13 TEMPORARY SEDIMENT TRAP., EROSION CONTROL INSPECTOR. WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. A TEMPORARY PONDING AREA FORMED BY CONSTRUC77NG AN EARTHEN EMBANKMENT K177-1 A 19. MAINTENANCE ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED DETERIORA77ON OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE ENOUGH TO ALLOW 774E MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN OF THE BARRIER. WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER 7HAN 18 MONTHS, AND IT MAY BE NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNC77ON WITH A TEMPORARY DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. DIKE. AND REPAIRED IMMEDIATELY. IN CASE OF EMERGENCY, 774E PRIMARY CONTACT FOR THE PROJECT WILL BE 774E RLD OR 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED CONTRACTOR ON -SITE. IN ADD177ON THE OWNER MAY BE CONTACTED. UPON COMPLETION J. OUTLET PUCTURALLY WITHIN 30 DAYS OF FINAL S17E STABILIZATION, WHEN MEASURES ARE NO LONGER OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. LINEDEC770N STRAPRONS OR OTHER ACCEPTABLE ENERGY DISSIPAPNG DEVICES PLACED NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE 774E 21. THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF NECESSARY /N THE FIELD AS S17E COND177ONS CHANGE. /N ADDITION, NO SEDIMENT CONCEN7RA7ED STORMWA TER FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHOR/ZAT/ON. ENGINEERED CHANNEL SEC77ONS. 3.19 RIPRAP: A PERMANENT EROSION -RESISTANT GROUND COVER OF LARGE LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION AND TO STABILIZE SLOPES WI SEEPAGE PROBLEMS AND OR NON -COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE AND 7HE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA77VE COVER, ETC., ARE SUCH THAT 7HE SOIL MAY ERODE UNDER 7HE DESIGN FLOW CONDITIONS. 331 TEMPORARY SEEDING: THE ESTABLISHMENT OF A TEMPORARY VEGETA77W COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS 774AT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNS7REAM OR OFF-S17E AREAS, AND TO PROVIDE PROTEC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 332 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 S17E CONDITIONS AND ALLOWS SELEC7ON OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. 338EE PRESERVAON AND PROCO. PR07EC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTINTY. 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 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. 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 774E 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 CONS7RUC77ON. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH 7HE VESCH. GENERAL SLOPE (3:1 OR LESS) PER ACRE TOTAL LBS 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. PS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) NOTE: THE PROPOSED EMBANKMENT AT THE EASTERN & SOUTHERN SIDES OF THE SITE IS IN CUT, WITH A MAXIMUM 2:1 SLOPE. SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH A NATIVE STEEP SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i LB PER i,000sf, UNLESS OTHERWISE SPECIFIED. THIS IS TYPICAL FOR AREAS OF PROPOSED SLOPES STEEPER THAN 3:1, AND THESE AREAS SHALL NOT BE MOWED. SOIL DESCRIPTION IJD-CATOC77N SILK LOAM-15 TO 25% SLOPES. SOIL IS WELL DRAINED Wl7H A MEDIUM RUNOFF CLASSIFICA77ON. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-5" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 39D-HAZEL LOAM-15 TO 257 SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM RUNOFF CLASSIFICA7ION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 21C -CULPEPER FINE SANDY LOAM-7 TO 15X SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEP7H TO THE WATER TABLE IS GENERALLY MORE THAN 80". REFERENCE. WEB SOIL SURVEY ONLINE DATABASE FOUND AT h ttp: //Websoilsurvey. nres. usda. govlappIWebSollSurvey. aspx EROSION CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC7CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL AND SED/MENT CON�OL HANDBOOK HANDBOOK AND VIRGINIA REGULATIONS VT 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS ES-2:7HE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO THE PRE-CONSTRUC770N CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING AC770TY AND ONE WEEK PRIOR TO 774E FINAL INSPECTION. ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4.A COPY OF 774E APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL 77MES 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 ADD177ONAL 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 ACTVI AND DURING S17E DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. ES-8. DURING DEWATERING OPERATONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES-9:7HE 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. TABLE 3.39-A ADHESIVES USED FOR DUST CONTROL Water Application Dilution Type of Rate Adhesive (Adhesive: Water) Nozzle Gallons/Acre Anionic Asphalt Emulsion 7:1 Coarse Spray 1,200 Latex Emulsion 12.5:1 Fine Spray 235 Resin in Water 4:1 Fine Spray 300 Acrylic Emulsion (Non -Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion (Traffic) 3.5:1 Coarse Spray 350 Va. DSWC FILTER FABRIC ENTRENCHED 6" COMPACTED SOIL IL 3' WIND" =III IIII - I -III -III -III -III= - =III=III=III=III=III=III=III=III =11 I I I=1 11=1I 1=1 I I -III -I 11=1 I1=1 11=1 11=1 I1=1 ter ION. _ =III=11I-III=IIII =III-III-III-III=III-III=11I-11I-111=1 - I I=1 I1=1 11=1I 1=1 I1=1 11=1 11=1 I1- 11=1 11=1I 1=1 I1-1 11=1I 1=1 I1= _ I II -III -III -III -III -III -III -III -III -III III -III -III- - II=- 1= 1=III=III=III III III= - IIIII III=III=III= - DD TEMPORARY 18" DIVERSION BERM �\ t CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) SET POSTS AMID UPSLOPETRENCH ALONG POSTS.1. OF POSTS. III r I) I' I1n'IpJ '�ill�'M����'I+�iIMp III• u - ■, I I ��n��i!i11111E���UIH■ lN c FLOW 3. ATrACH THE FILTER FABRIC TO THE WIRE 4. BACKFILL AND COMPACT FENCE AND EXTEND IT INTO THE TRENCH. . SOIL. 13 4 OIL l l il'0 I 1 a _,alllw= I-= FLOW etlU �illll C EXTENSION. THE TRENCH. FILTER FABRIC y I/IIIII AdaptedWIRE . Installation of Straw and Fabric SedimentBarriers for . . I.. and Wyant Plate 3.05-1 EROSION CONTROL NOTES & NARRATIVE PROJECT DESCR/P770N: THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS FOR THE CONSTRUCTION OF A PARKING LOT AND A 2,000 COMMERCIAL OFFICE BUILDING. THIS PROJECT PROPOSES TO DISTURB 0.97 cc. OF LAND. THE PROJECT WILL BEGIN ITS CONSTRUCTION WITH THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS ANTICIPATED TO BE IN THE FALL OF 2020. THE WORK IS ANTICIPATED TO BE COMPLETED WITHIN 12 MONTHS AND TO CONCLUDE IN THE FALL OF 2021. EXIS77NG S17E CONDITIONS.' THE AREA OF THE PROPOSED DEVELOPMENT IS VACANT LOT MOSTLY COVERED BY DENSE VEGETATION. THE SITE GENERALLY SLOPES FROM THE SOUTHEAST TO THE NORTHWEST TOWARDS STONEY RIDGE ROAD. ADJACENT AREAS.• THIS SITE IS BORDERED TO THE NORTH, EAST AND WEST BY COMMERCIAL OFFICE BUILDINGS. TO THE SOUTH IS A DOG DAYCARE BUILDING AND A MEDICAL SERVICES BUILDINGS. SILT FENCE, DIVERSIONS, SEDIMENT TRAPS, INLET CONTROLS AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT THE POTENTIAL FOR CONTAMINATION OF THESE ADJACENT PROPERTIES. OFFSI7E LAND DIS77JRBANCE.' OFFSITE LAND DISTURBANCE IS LIMITED TO PUBLIC RIGHT-OF-WAY. SOILS: SEE SOIL DESCRIPTIONS ON THIS PAGE AND THE PHASE I EROSION & SEDIMENT CONTROL PLAN FOR SOIL BOUNDARIES. CRITICAL AREAS,• THE MANAGED STEEP SLOPES ON THE EASTERN PORTION OF THE SITE ARE CONSIDERED TO BE CRITICAL. THE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN AND AROUND THESE AREAS TO ENSURE CONSTRUCTION ACTIVITY DOES NOT DISTURB THESE EXIS77NG FEATURES. TREE PROTECTION FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED. SEQUENCE OF CONS77?UC7/0N. 1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A PRE-CONSTRUCT70N MEETING. 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE PROTECTION FENCING SHALL BE INSTALLED. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT 4. INSTALLATION OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL APPLY CONSTRUCTION ROAD STABILIZATION AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUCTION ENTRANCE DRAINS TO AN ADEQUATE E&S MEASURE. THE CONTRACTOR SHALL UTILIZE THE NEARBY SEDIMENT TRAP #1 FOR VEHICULAR WASH OFF. CONSTRUCT70N 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. THE INITIAL ESC CONSTRUCTION MEASURES, AS SHOWN ON THE PHASE l EROSION & SEDIMENT CONTROL PLAN, SHALL BE INSTALLED NEXT. THE CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE AND TREE PROTECT70N. PERIMETER 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 THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, THE CONTRACTOR SHALL BEGIN LIGHT CLEARING. THE CONTRACTOR SHALL BEGIN BY CLEARING THE AREAS IN THE VICINITY OF SEDIMENT TRAP #1, AND THE AREAS REQUIRED TO ACCESS IT. FOLLOWING THIS MINOR CLEARING THE CONTRACTOR SHALL INSTALL SEDIMENT TRAP #1 AND STRUCTURES 1-4, 9, 10 & A PORTION OF SIR. 5 TO THE NEAREST PIPE (OUTSIDE OF SEDIMENT TRAP #'1's FOOTPRINT). THE TIMING OF THESE STRUCTURES' CONSTRUCT70N WILL AVOID FUTURE DISTURBANCES TO THE TRAP IN SUBSEQUENT ESC PHASES. STRUCTURES 4 & 5 SHALL BE SEALED WATERTIGHT TEMPORARILY UNTIL THE TRAP IS CONVERTED TO A PERMANENT FACILITY. THIS WILL ALLOW STRUCTURE 10 TO CONTINUE TO DIVERT THE OFFSITE, UPLAND, CLEAN RUNOFF TO THE EXISTING STORM SEWER (TO REMAIN) WHEN THE ONSITE PORTION OF THE EXISTING CONCRETE DITCH IS REMOVED FOR THE INSTALLAT70N OF SEDIMENT TRAP #1. THIS SEQUENCING WILL HONOR THE EXISTING FLOW PATTERNS AND WILL PREVENT CLEAN WATER RUNOFF FROM BEING DISCHARGED DIRECTLY ONTO THE CONSTRUCTION SITE THE CONTRACTOR SHALL THEN INSTALL THE DIVERSIONS. ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME. 7. ONCE ALL THE PHASE l EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL DRAINAGE lS PROPERLY CONVEYED TO THE APPROPRIATE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF THE SITE. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 8. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE lI OF THE EROSION & SEDIMENT CONTROL PLAN. THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE PHASE lI EROSION & SEDIMENT CONTROL PLAN. 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. 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE l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i LL REGIONS" Rate Planting Dates SMcies (Ibs. acre Sept. 1 - Feb. 15 50150 Mix of Annual Ryegrass (LoHum multi-florum) & 50 - 100 Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - IOU (Lolium multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italica) Paved construction entrance for erasion control plans `.10NE -70' MIN. (ULic. ��� 'ONSTRUCnON /-� 5 Y' - TOP }' SM 2A ASPHALT 0 COURSE XI TI E S NG OTTTR. C>?LLINS� zx 2x PAVEMENT No. 035791,a10 12/4/208- MIN. 21A AGGREGATE BASE\ ' PROFILE �SSrONAL E�G� STONE 70' MiN. CONSTRUCTION ASPHµT PAVED ACCESS A WASNRACK EXISTING -2% 2% PAVEMENT I t12S 2' MIN. 1 0 N 0 C •MUST EXTEND FULL WIDTH L o TSEDI O SEDIMEENT `- OSNAINAGE OF INGRESS AND EGRESS T,y OPERATION TRAPPING DEVICE 0 Z J ¢ F PLAd 0 ,,AA o U) m F O � Z 12' MIN. POSITIVE DRAINAGE U) w Zz TO SEDIMENT p TRAPPING DEVICE O Z j O O J O rl'. TTR C.0-H Ce z Q� SECTION Az A H a LU A n111lalaan wafer tap of I Inch whit be ustalled mth a Ilwwnom 1 Inch ballcock > m shutoff Vah a sllpphvtg a Writ) hOse eVh a dlauniel of I ' mtht� tol adetplate W w t VlWlald IncI;s ve. Wash w'Me must be tallied a1ea% hoUl the enhance to an applc�etf settluw xea to leuoee se\Wuau Al setWund ha8 be pleVelted Sow Ie ente uR stonu thaws. ddches of Wate,tomses PAVED WASH RACK NJ Si 1992 338 Source: Va. DSWC 1992 Plate 3.38-2 3.05 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MAX. FLOW IIII - IIII 4.. 3. STAPLE FILTER MATERIAL 4. BACKFILL AND COMPACT TO STAKES AND EXTEND THE EXCAVATED SOIL. IT INTO THE TRENCH. , - IIII! - -IIII FLOW III III R� SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) I I I I w. - - / A A FLOW �I/ - IIIIII�II POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, Sherwood and Wyant Plate 3.05-2 0 0 rj -a 0 CA ti M z M N (y) N O O N W N WQ > w zJ J U) alalta w O J z= U W LLI Ul j F- ZLLI w IY U) tJLU 0 O O N U r' Q In J J III C) V / W 1 > T� < L7L O J J O J L`L O 1 z ZD W 0 z o i LU LL O III U U0 J O FJ-I w L w J F H Lu W w a U) JOB NO. 202179 SCALE N/A SHEET NO. 3 / PROPOSED LOCATION i ® i STR. 10 / OFF EL STORAGE / TP STR. 9 y, a ���� EXISTING SOIL DESCRIPTION (TYP.) ' SEE SHEET 3's SEQUENCE OF CONSTRUCTION NOTE #6 FOR THE TIMING '7 \ in / OF STRUCTURES 1-4, 9, 10 & A PORTION OF STR. 5's CONSTRUCTION. 3 ,� — /) J / 2. / SILT FENCE TO ENCOMPASS STOCKPILE LOCATION / STR. 4c9/ \ , PROPOSED ORAGE SAFETY FENCE STR. 2 / l / �� �� �I� / s TO ENCOMPASS SEDIMENT TRAP f l l /h AND ITS OUTFALLATALL TIMESFOR _ SAFETY. INSTALL SIGNIIi /I I �� / / ST TRAP THAT READ "DANGER, QUICK / / _ SAND, DO NOT ENTER" 7 / /C /—ro S FLOW DIRECTION ARROW (TYP.) 39D / i I I( (� // / / / i 7EXISTING SOIL LINE (TYP.) ��� EAU as ID Sediment Trap Design drainage area (acres) (<3) 1.46 vARVaE trap volumes: ORiCwr•L CREST OF STONE WEIR WRIoe 0 OUND elevation (ft) area (sf) volume(cf) volume(cy) CLLV. 447 197 0 0.0 448 391 289 10.7 DRY STORAGE - N Vvwai 449 622 791 29.3 450 884 1,540 57.0 451 1177 2,567 95.1 WET STORAGE a• u�x. 452 1500 3,902 144.5 tEXCAVAIEO> ELTER CLOTH OR GINAL 453 1849 5,573 206.4 ` cELNNo \ 454 2223 7,607 281.7 .SEE PIAn a,a-, COARK AGGREGATE CIMS I RIPW wet storage wet storage required (cy) (67*DA) 97.8 bottom of stone weir (ft) 451.1 wet storage provided at this elevation (cy) 97.8 slope of wet storage sides 2:1 weir length (ft) (60A) 8.8 dry storage: bottom of trap elevation (ft) 447 dry storage required (cy) (67*DA) 97.8 bottom trap dimensions: Tx41' crest of stone weir 453.0 top of dam elevation (ft) 454.8 dry storage provided at this elevation (cy) 108.6 top \Mdth of dam (ft) 2' slope of dry storage sides 2:1 top trap dimensions 35'x75' NOTE: THE FUELING TANK SHALL BE COMPLETELY SURROUNDED BYA2.5' DEEP, 2' WIDE EARTHEN SEDIMENT TRAP #i DESIGN I I I BERM WITH A HEAVY MIL POLYETHYLENE LINING. PROPOSED LOCATION OF DUMPST LOCATION / THE PROPOSED BERM SHALL CONTAIN FUEL I 1 / I SHOULD IT BE SPILLED, SPILLED FUEL SHALL NOT BE RELEASED OUTSIDE THE LIMITS OF THE SCOIT S�ZLIN Lic. No. 035791,'n 12/4/20 �4 CD N 0 N Z J Q 0 r o Ln Vww Z Um M n wZ p a � ZUO 0> E� J III a a W ~ pC Z IY w W > CONTAINED FUEL STORAGE AREA. CONTRACTOR li PROPOSED LOCATION SHALL ENSURE THE BERM VOLUME IS io% LARGER / \ OF PORTA-POTTY / �� / THAN THE MAXIMUM VOLUME OF STORED FUEL. ��� `.; / PROPOSED RIPRAP © / Z SF 3 b CONTRACTOR MAYALSO ELECTTO PLACETHE OUTFALL TO EXISTIN i2 x7o' MIN. PAVED CON TRUCTI N v �� ���� ROADSIDE DITCH ENTRANCE IN ACCORDANCE WITH THE DETAIL // Q STORED FUEL IN AN ACCESSIBLE DUMPST�. / SHOWN ON SHEET 3. CE SHALL REMAIN UNTIL CE � / vi Ulm APPROVAL TO REMOVE IT HAS BEEN � � � / / X y ,�� / � GRANTED BY VDOT & THE ESC INSPECTOR. // / I / 4� / / � � / M — G 4fi / TS w N N r4 v Q N � AA k rn -- / W PHASE I DRAINAGE ARE / DRAINAGE DIVIDE (TYP.) / -SEBtMENT TRAP = 1.46 ACR�s S", LU 7- / \ CIO / ��� , • 3 / / / / v PROPO ED 2.5' DEEP GRADED DEPRESSI N, � WITH A RUBBER MEMBRANE LINING TO / / / / / / (+') PREVENT / / / \♦� / / / / 3 SOIL INFILTRATION, SHALL BE US D FOR THE CONCRETE WASHOUT AREA. / / y / ✓ / h M / / / / / C / I %� / V / / / N U) Q ' / / � W N ANY / - - 777�XA7 I • I / / , �,, // I / SF 2 LIMITS OF DISTURBANCE=a 97ACRE5 / / > 0 21c / / 47 _ T P 7 / _ / o 0 _ �� I I / / / / � o LU O z 3 i / COUNTY DEFINED W MANAGED STEEP / O SLOPES (TYP.) 0 �FS V PROPOSED LIMITS OF DISTURBANCE / 48D_ G \ 1 I / / U LLJ COINCIDES WITH EXISTING PROPERTY LINE / / G 1 o6 3� ♦♦♦ — ---� / /� L Y V) z LLJ / ♦ s _ 0 c ; / / ♦�♦ v A ROPOSED ORANGE SA ETY �ENCE TO ill — / / / / / /� / ♦ / / / ENCOMPASS SEDIMENT TRAP AND ITS I --I / i ♦ \ 3 / OUTFALL AT ALL TIMES FOR SAFETY. LU W INSTALL SIGNS AROUND TRAP THAT READ W w U) / / / \ \` / / / / �/ / ♦♦♦ / "DANGER, QUICK SAND, DO NOT ENTER" W = / / / /� // / / ♦� 7 _ �� / U) a / / / / ♦ •..• ♦ S / J �4t*41' /59C noun � /00; C:) ♦♦♦ / / N /\Lu �� / /� / / ♦ AAA �/� JOB NO. ` / / �/ / / / / / / ♦i411 202179 /GR7HIC� SCA E / ♦ ' / I SCALE // GRAPHI SCALE 20 0 /0 0 4 80 I .� ,D D 5 ,D 20 40 AS SHOWN SHEET NO. IN FEET ) 4 1 inch = 10 ft. PROPOSED LOCATION TH O F OFF ElJ L STORAGE E �x TP jr SCOTT R. LLINS Z \� C) Lic. No. 035791,n 4 12/4/20 / \ SILT FENCE TO ENCOMPASS / � � 'StONAL E��S STOCKPILE LOCATION --- --- -- � PROPOSED OR4GE SAFETY FENCE % TO ENCOMPASS SEDIMENTTRAP AND ITS OUTFACE AT ALL TIMES FOR � � � I� 1 /y h SAFETY. INSTALL SIGNS AROUND I ( ST z — _ TRAP THAT READ "DANGER, QUICK / — — SAND, DO NOT ENTER" / — — l I / I ��/ TS FLOW DIRECTION / / o ARROW (TYP.) r, / // / / / o 3 Ln / K a Lu s P I DI I 'Z // f- -- O o a 0 • 3 / / / (A w � / w / j • NOTE: THE FUELING TANK SHALL BE COMPLETELY / / / / H S / a rn �: . \ SURROUNDED BY A 2.5' DEEP, 2' WIDE EARTHEN PROPOSED LOCATION / SEE SHEET 3 s SEQUENCE QF A • BERM WITH A HEAVY MIL POLYETHYLENE LINING. / / / / ,: , j CONROCTION NOTE #9 FOR THE PROPOSED BERM SHALL CONTAIN FUEL / / ` / / UJ w> O OF DUMPSTER(s)\ / r ' THE'TIMING OF STRUCTURE o � SHOULD IT BE SPILLED, SPILLED FUEL SHALL NOT / � / / / X _ 5 & 6's CONSTRUCTION./ STR. 6 3 r� BE RELEASED OUTSIDE THE LIMITS OF THE PROPOSEDL • \ CONTAINED FUEL STORAGE AREA. CONTRACTOR V OCATION SHALL ENSURE THE BERM VOLUME IS 2o% LARGER / Ja OF PORTA-POTTY / n I M N v / \ y THAN THE MAXIMUM VOLUME OF STORED FUEL. ' \ A o �y b CONTRACTOR MAY ALSO ELECT TO PLACE THE \. 12 x7o' MIN. PAVED CON TRUCTI N v / /� / Y �4x /. N SF a �J STORED FUEL IN AN ACCESSIBLE DUMPSTER. ENTRANCE IN ACCORDANCE WITH THE DETAIL SHOWN ON SHEET3. CE SHALL REMAIN UNTIL �E /:. APPROVAL TO REMOVE IT HAS BEEN O GRANTED BY VDOT & THE ESC INSPECTOR. / / L4�jF /. \� �1 / / / / r N N TS /CD �� DRAINAGE DIVIDE (TYP.) i / PHASE II DRAINAGE AREA TO \ 3 / SEDIMENT TRAP=i.46ACRES L9 / 3 - z •� • V / / /� M IV / OUTHERN SIDES OF THE SITE IS IN CUT, WITH A MAXIMUM 3 PROPO ED 2.5' DEEP GRADED DEPRESS! N, / / / / d :1 SLOPE. SLOPES GREATER THAN 3:1 SHALL BE PLANTED \ • WITH A RUBBER MEMBRANE LINING TO / \+ ITH A NATIVE STEEP SLOPE MIX WITH ANNUAL RYEGRASS • \ PREVENT SOIL INFILTRATION, SHALL BE ♦� Y ERNST CONSERVATION SEEDS AT A RATE OF 6o CBS. PER 1 • ; US D FOR THE CONCRETE WASHOUT AREA. / N / / / �OL >• / — HHIS IS TYPICAL AN O AND THESE AREAS OF PROPOSED NOT LOPESMOWESTEEPER / •♦ \ \ / / / / / i LB PER 2,000 SF, UNLESS OTHERWISE SPECIFIED. O z Q Lu SF LIMITS OF DISTURBANCE=o.97ACRES ♦ / / / / e J > OU w O F— / F- J z �_ Lu O J ®® COUNTY DEFINED � / J r-I / ®®��, �� MANAGED STEEP �� / / in Q ® SLOPES (TYP.) / / / Q I --I Lu --- / PROPOSED LIMITS OF DISTURBANCE c � ,aeo_ /f / / 3 V COINCIDES WITH EXISTING PROPERTY LINE . / i /� / Lu Y O / /' 3 / _ / / ♦�� V�� �� / / // L Ln o / 3/ / 1 / �• -_ - - / —490 Ld / � / � � � / � / � � ♦� z EROSION &SEDIMENT CONTROL LEGEND of VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICA TION NUMBER �� CONSTRUCTION 3.02 LLJ L/ ENTRANCE / / /, 3/ / / / / �\ / / // / / ••�� �• ••. 5• SF SILT FENCE 3.05 < ~� �♦ l(!D1� . S\ I ClP PROTECTION T 3.08 — V / / / / / l / / / / / / �/ / / / l •♦. DD �� DIVERSION DIKE 3.09 N / / / / / / / / / / / / / ♦♦ I RW �"� OF-WAYDIVERSION 3.11 / /\ / / / / / / / / / ♦♦ ) \ ST O SEDIMENLu T RAP 3. 13u b H / \ / / / / / / ♦♦ \ RR RIPRAP 3.19 w I p w / / /\ / // / / / / ♦7� l TS TS TEMPORARY SEEDING 3.31 d V) \\\ / � / / / / / / ♦♦ � / PS PS PERMANENT SEEDING 3.32 JOB NO. "APITIC AL ♦ ♦ 202179 / ♦♦ . / TP TREE PROTECTION 3.38 zo o io zo / ao so I / . SC ALE DUSTCONTROL 3.39 1 20 NOTE: INAL .• ALL LRM STUBBEDNENT AREAS ATNOT PAVED MUSTAFTER HAVE SHEET NO. GRADING IS COMPLETED. 5 PROPOSED LOCATION ® PS I / / / \ _ — / / TH 0 OFF ELSTORAGE / f I a TP t /SCOTT R. LLINS Z U Lic. No. 035791� / ,/ —♦_ �9s / / 12/4/20 Iry SILT FENCE TO ENCOMPASS / / / / / �SSIONAL EGOS • STOCKPILE LOCATION / / / / ✓ �' ; ; i ' • c / / PROPOSED ORAGE SAFETY FENCE TO ENCOMPASS SEDIMENT TRAP / AND ITS OUTFALL AT ALL TIMES FOR SAFETY. INSTALL SIGNS AROUND— / _ TRAP THAT READ "DANGER QUICK SAND DO NOT ENTER" ' I I / / �� / CD FLOW DIRECTION / 0 ARROW (TYP.) J / S / 3 I I /// / / / Z k o W O n u � z S / _// % / w cn w 3� Un Z O I — \ / �♦ > .. . L �w NOTE: THE FUELING TANK SHALL BE COMPLETELY S / a / SURROUNDED BY A 2.5' DEEP, 2' WIDE EARTHEN PHASE III DRAINAGE AREA TO 3 BERM WITH A HEAVY MIL POLYETHYLENE LINING. / / PROPOSED LOCATION I / THE PROPOSED BERM SHALL CONTAIN FUEL / / / / w 0 OF DUMPSTER(s) i SEDIMENT TRAP=1.37 A�R�S'i cr \ SHOULD IT BE SPILLED SPILLED FUEL SHALL NOT / / W 3 \ BE RELEASED OUTSIDE THE LIMITS OF THE / / / / / ce CONTAINED FUEL STORAGE AREA. CONTRACTOR PROPOSED LOCATION �i `i� � - 1 1 SHALL ENSURE THE BERM VOLUME IS io% LARGER / OF PORTA-POTTY / �� `,'�B M I� ' a THAN THE MAXIMUM VOLUME OF STORED FUEL. / CONTRACTOR MAY ALSO ELECT TO PLACE THE \ / 12'x\' MIN. PAVED CON TRUCTI N / / SF STORED FUEL IN AN ACCESSIBLE DUMPSTER. ENTRANCE IN ACCORDANCE WITH THE DETAIL SHOWN ON SHEET 3. CE SHALL REMAIN UNTIL �E APPROVAL TO REMOVE IT HAS BEEN GRANTED BY VDOT & THE ESC INSPECTOR. w ^' rq �rq r4 v / � � T / ✓ 4� :i 3 � "TJ / 0 � N / a< I �14 DRAINAGE DIVIDE (TYP.) IV L 4; 1 L9 7— P r 'cyi : I �� I / / rn z / / s P PROPO D 2.5' DEEP GRADED DEPRESSI IN,, w I I I, WITH A RUBBER MEMBRANE LINING TO 3 w' — / PREVENT SOIL INFILTRATION, SHALL BE 0 3 US D FORT E CONCRETE WASHOUT AREA. p, �/ N a r / // / / / Q ' JO 1 3 / // > SF / / / Lu r� H OF DISTURBANCE=o.97ACRES . / / / / J r� z LIMITS O TP 3 // / // / w B 0 z I- J Lu / / 3 COUNTY DEFINED J J Q MANAGED STEEP / // / E 3 SLOPES (TYP.) / Q I—w I SOUTHERN SIDES OFTHE SITE IS IN CUT, WITH AMAXIMUM / �/ / / / _ �/ (n 3 — :i SLOPE. SLOPES GREATER THAN 3:1 SHALL BE PLANTED / / LL 0-6 ITH A NATIVE STEEP SLOPE MIX WITH ANNUAL RYEGRASS c� / 05 PROP LIMITS OF DISTURBANCE aV Y ERNST CONSERVATION SEEDS AT A RATE OF 6o LBS. PER \ �% / / / i 3 / COINCIDES WITH EXISTING PROPERTY LINE ACRE, OR i LB PER i,000 SF, UNLESS OTHERWISE SPECIFIED. HIS IS TYPICAL FOR AREAS OF PROPOSED SLOPES STEEPER / / / 3/ / / ♦� HAN3a, AND THESE AREAS SHALL NOT BE MOWED. \cam / / / / / LLJ� Q O // / / / ♦ f / / ct) Z w r / 3/ , / / / / //♦♦ / / / Lu w W w / / 3� / / / / ��♦ / —� / / oC i ♦y♦ 3 / r J / / / / / / / / / / / •... ♦•� 14, S J Q / �� /� / / / / / ♦i S - o Lu / / / / / / / ♦♦ U b F- / I \/\ / / / / // // // / / / / ♦i, / d Lu JOB NO. / ( — — �/ // // / // / / // / / / ♦♦♦ 1 / / l / / / / � / ♦♦ � G�ZAPHI CALE 202179 l \ \ 20 0 10 20 40 90 SCALE . / ( IN FEET ) SHEET NO. I inc - 20 ft. 6 h­'Kt:-UtVtLUHIvItIN I J I UKIvIVVA I rK IvIAINAIat:Ivlt:IN I I'WIV. SCALE 1"=30' 1�1►7G/A/Al�J71JIa1\b71�J:1G\4v_\��:�IIIG\►9Gld�Ill�la���I_1\I[-'I�L1/ Y6�l _M / PROPERTY Ih_ .����• M LIMITS, TYP. / \ 3 \l � P E-DEV DA A / ♦ I I C"' 4c1 Tc=0.113 hrs ♦ / // / 3 —�-- / --7 - ' I I♦ // I TT��iiE ESC BOUNDARY FO$ THE I ♦ / 10�OF OLF w/ d ELEV.-/,8 LIIahTS OF DISTURBANCI` DEFINE S i ✓ � 50' OF CONC. FLOW w//0� ELE 3 THE VRRM BOUNJDA'RY FOR ER/ - QUALITY. TOTAL LIMITS e DISTURBANCE77 ac. I ♦ APPROXIMATE DISCARDDIRT & MULL i rfISTID43; CLOSED STORM SEWER SYSTEM (TO REMAIN) ROUTES PLAND RUNOFF THROUGH THE BJECT PROPERTY. / / 1�\-UNDEVELOOF vf„ / PORTION OF ; THE SITE Pre -Development Impervious Area Summary / GRAPlIIC S A ♦♦ DA A (Water Quantity) / 0 15 30/ / so 120 / ♦ / Existing Gravel 3,350 sf Discarded Dirt and Mulch 7,175 sf Existing Pavement & Concrete 4,375 sf " /� IN - 14,900 sf / me - ft. CTR FY-1 F1R4TNI4(;F APPA MAD crnir� _rm �S / A / EXISTING - - / STIR. EX-1 m# ''♦♦ - - - DRAINAGE AREA DEPICTS SURFACE RUNOFF TO THE EXISTING LOW POINT/STR. EX-1. DRAINAGE /� - _ r AREA WAS ANALYZED TO ENSURE PONDING i w w w w w DOESN'T OCCUR AT THE PROPOSED ENTRANCE 1 �' DURING THE 10-YEAR DESIGN STORM. SEE m m 0 imm imm - - EXISTING CALCULATIONS PACKET FOR ADDITIONAL DETAILS. STIR. EX-1 , ... i ,, --_ 0.54 ac.,ir— . / Tc-5 minism. / /w L i- ,� �o / -M M 3 r F I POST-DEV DA A ac8 \Tc 0 12 hrs. a / / / 45 u 0 SCOTT/R. Cl?LLINSZ / U Lic. No. 035791 a 1214120 o��ssrONAL E�Gl / LTJ�iE ESC BOUNDARY FO THE LIAdfTS OF DISTURBANCDEFIN S THE VRRM BOUNDARY FO ATER/ / QUALITY. TOTAL LIMITS OF DISTURBANCE= 0.9y ac. / 3 EXISTING; CLOSED STORM SEWER SYSTEM (TO REMAIN) ROUTES . PLAND RUNOFF THROUGH THE EJECT PROPERTY. ♦ — x\ / ♦♦♦ "-UNDEVELOPED-,,, � '� �/ jj,) PORTION OF � - /v� 7 THE SITE b � y G - v G / / / / / �/ �♦ 100' OF OLF Ei F_�`r=zo` & / / / / / // / ♦� /405-OF CONC. FLOW w/ AEL V.=29' i 7 ■. ♦♦/. /♦♦ S / Post -Development Impervious Area Summary / / / •� DA A (Water Quantity) / GRAPHIIC S A / ♦♦ Existing Gravel 2,700 sf 30 / 0 15 30' 60 120 / Existing Pavement & Concrete 4,375 sf / Proposed Building 2,000 sf / Proposed Concrete 1,180 sf / / • Proposed Parking Lot 13,250 sf �" /i� IN - ET 23,505 sf �lnc - ft. I / I i /PROPERTY �X LIMITS, TYP. GENERAL SWIM NOTES: STORMWATER MANAGEMENT NARRATIVE: 2. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON THE NEXT SHEET, OR EQUIVALENT, FOR INSTALLATION. OVERVIEW 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM THIS PROJECT PROVIDES STORMWATER MANAGEMENT SWM PRACTICES TO MITIGATE THE IMPACTS FROM THE VESCH 3.14 SPECIFICATIONS. PROPOSED IMPROVEMENTS. THIS STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWIM REQUIREMENTS 3. CONTRACTOR SHALL HIRE ATHIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE AND IS FOR THE DEVELOPMENT OF PHASE I OF THIS PROPERTY, AS SHOWN. AT THE TIME OF PHASE II's DEVELOPMENT, EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED A SEPARATE VSMP REVIEW AND APPROVAL WILL BE REQUIRED. CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING AND THE REMAINING WATER QUALITY SUMMARY DISTURBED EMBANKMENT SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL THE STORMWATER REQUIREMENTS UIREMENTS FOR THIS DEVELOPMENT ARE MET THROUGH THE BEST MANAGEMENT Q Q MATERIAL SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR PRACTICE OF PURCHASING NUTRIENT CREDITS. A MINIMUM PHOSPHOROUS REMOVAL RATE OF 0.92 Ibs/yr IS REQUIRED ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY FOR PHASE I. THIS REMOVAL RATE TAKES INTO CONSIDERATION THE PROPOSED PHASE I, BUT DOES NOT INCLUDE A DENSITY ASTM D698 AND HAVE MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND 2%OF POTENTIAL FUTURE PHASE II. THE DEVELOPER WILL PURCHASE NUTRIENT CREDITS PRIOR TO THE ISSUANCE OF A LAND OPTIMUM MOISTURE CONTENT. ALL EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED DISTURBANCE PERMIT. PLEASE SEE THE ATTACHED CALCULATIONS PACKET AND THE SWIM SHEETS FOR ADDITIONAL CONSTRUCTION SHALL BE APPROVED BYAN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING DETAILS. THE CONSTRUCTION OFTHE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE SAMPLING. WATER QUANTITY SUMMARY 4. THE DOWNSTREAM EMBANKMENT SIDE SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A THE PROPOSED DEVELOPMENT OUTFALLS INTO AN EXISTING MANMADE STORM SEWER SYSTEM LOCATED ON STONEY MAXIMUM 3:1 SLOPE. RIDGE ROAD. THE VAST MAJORITY OF PHASE I's PROPOSED IMPROVEMENTS ARE ATTENUATED VIA AN 5. CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN ANY ESC SEDIMENT TRAPPING INTERCONNECTED SWIM BASIN'A'AND SWIM BASIN'B'. THE RUNOFF RELEASED FROM THIS SYSTEM MEETS MINIMUM FACILITYTHAT IS PROPOSED TO BE CONVERTED TO A PERMANENT SWIM FACILITY. ATTHE TIME CHANNEL AND FLOOD PROTECTION REQUIREMENTS SET FORTH IN 9 VAC 25-870-66.CHANNEL PROTECTION IS MET OF THE FACILITY's CONVERSION TO A PERMANENT SWIM FACILITY, THE CONTRACTOR SHALL THROUGH 9VAC25-870-66 SECTION B.3.a (ENERGY BALANCE) AND FLOOD PROTECTION IS MET THROUGH REGRADE THE BASIN TO THE PROPOSED CONTOURS SHOWN ON THE PROPOSED SWIM PLAN. THE 9VAC25-870-66 SECTION C.2. b. (10yr. POST FLOW < 10 yr. PRE FLOW). PLEASE SEE THE ATTACHED CALCULATIONS CONTRACTOR SHALL MINIMIZE SOIL COMPACTION DURING THE CONVERSION. PACKET AND THE SWIM SHEETS FOR ADDITIONAL DETAILS. WATERSHED SUMMARY FOR ENERGY BALANCE CALCULATIONS Area, 1-year Flow, 2-year Flow, 10-year Flow, CN ac. cfs cfs cfs DAA (Pre-Dev.) 64.1 1.37 0.98 1.61 4.26 DA A (Post-Dev.) 73.8 1.37 0.41 0.87 3.60 Post -Development VRRM Impervious Area Summary General Construction notes for Stormwater Management Plans 1 All dams and constructed fill to be within 95% of maximum dr BoundaryDefined b ESC LOD Water Quality) y Y ( Y) density and 2% of optimum moisture content. "All fill material to Proposed Building 2,000 Sf be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. Proposed Concrete 1,745 sf 2. Pipe and riser joints are to be watertight within stormwater Proposed Parking Lot 14,225 sf management facilities. 3. For temporary sediment traps or basins which are to be converted Stoney Ridge Road Improvements 4,075 sf to permanent stormwater management facilities; conversion is not 22,045 sf to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. 0 N 0 N � z J Q0 � o rrAA an V/ an u U)w Z o a LU W f O z O � O U) J a F�1 a > 3 z ae w a U) W w 73MEN 0 0 rq r rq 0 Ch M z oJ Q 00 � J 1 I'L N C O G W N V) Q jW > z w ,-1 Q J � w � LU Ld J J z Of = LL U LU UJ Y Q LU Q D z Ul I— U) I --I O Ln W Wv W Z 0L W U) l � cL U JLU IIIIJ Q 0 O O N U w J Lu H W w a- 1n JOB NO. 202179 SCALE 1"=30' SHEET NO. 7 DETENTION BASIN'AI &'B' CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS: 1. THE DETENTION BASIN SHALL HAVE TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONAL AND 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 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. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. CONTRACTOR REQUIREMENTS: 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. S. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY AT 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. S. 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 MAYBE 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 SOILISFROZEN. 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A S1ZE 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 RE UIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OFTHE PERMANENT RISER SHALL BE INITIATED Q DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST CONSTRUCTION POND 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 POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS SEDIMENTTRAP 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 THATTHEY 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 STRIPTHE PROJECTAREA IF REQUIREDTOTHE 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. CONTRACTOR SHALL 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 Specifrcaaons Property Test Method unit Specification Permeability ASTM D-2434 Cm/sec 1 X 10 Plasticity Index of Gay ASTM D-423/424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clary Particles Passing ASTM Dd22 % Not less than 30 Clay compact - 95% of standard prodor detnailly Source: Virginia Stormwater Management Handbook (1999) 9. UPON COMPLETION OFTHE EMBANKMENT GRADING THE CONTRACTORSHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATIONAND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. CONTRACTOR SHALLTHEN CONSTRUCTTHE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALLTHEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION IF APPLICABLE. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 13. THE CONTRACTOR SHALLTHEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, W APPLICABLE. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OFTHE 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 INTHE BASIN. 2. MONITOR THE GROWTH OFTHE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCEOFANY 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 FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH AND OTHER AREAS OF CONCERN AS APPLICABLE. 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 AS APPLICABLE 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 OFTHE 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 ENGINEERAND INSPECTOR DURING THE FOLLOWING STAGES OFTHE DETENTION BASIN's CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS) 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) 5. INSTALLATION OF THE EMBANKMENT & EMERGENCY SPILLWAY, THE RISER/PRIMARY SPILLWAY AND THE OUTLET STRUCTURE(s). 6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE) 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) StormRaxnu ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD eO INCH RACK SHOWN DIMENSIONS IN INCHES (OR EQUIVALENT) PLAN SIDE VIEW 6tormRaXTN Round Series for Concrete Manhole Part ML Dim A aln 8 Mac MIN ID MYI OD RL24 17)11 14H n 24 30 ki36 21 14 IO,i 36 a lse 2714 Is 54. 49 sr Wall 27M >e Yi Ii6JS 6o 70 Plastle Solutlons, Inc. L1slolot PO box 4386, W130MMAXT, YA ZRAW re8 Morse Md. Nochausr. VA 72603 1877387LS727phow PD,r4,7: Is4o) 7u-m v rx htgx/A+w,w.psarw4aon.mn vosermlcrulw vlKnan PlA3rIc aaunwN rc ISOMETRIC CONCRETE 9TROCrunE DImmooN9 IN 9TRUl:'Tl1rkE DIMENSION OIfISIDE STRUCTURE DIMENSION AVMI AIN v OPTIONB GROSS BRACING FOR OVERHANG HDPE ANTI -VORTEX PLATE DAM 01MYM 6'h AMITY: DETAIL Perforated a FOUNDATION DRAIN T, COUNTY OF ALBEMARLE SECTION A-9: TYPICAL GRAPHICAL DETAILS fill min W off trench-4' below Suitable ( SDA or rock L - - - - - -material - - J TYPICAL HOMOGENEOUS EMBANKMENT SIOtS drain Sand, grovel or rock drain 6ediet iRoek toe �%Transitson filter CHIMNEY DRAIN fill or gravel BLANKET DRAIN Rgcn Of gravel Amen -te'cA o0 Tromition flier TOE DRAIN Figure A -la. Hano e7eors Embankments sirlS eepage Controls 1 /2" zinc plated hook attached with 1'8' raetener • \(Dt 2-1/B" die. holes • P®®ny r® Isometric Op r I /l/4' HDPE plate (optional) HDPR alruclursI plastic rril.h 0 2-1/d" holes and I14" plate annu.•e clured b Plastic 00 Y Solution. Inc. or equal Q (Do s iI o Nflee GICVdLIUII DEBRIS CAGF Depamnent of Community Development ",tea Construction Record Drawings (As -built) for VSMP The following is a list of information required on construction record drawings for storlllwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the construction record drawing be prepared by someone other than the designer. Please do not provide design drawings as construction record drawings. A. A signed and dated professional seal of the preparing engineer or surveyor. B. The name and address of the firm and individual preparing the drawings on the title sheet. C. The constructed location of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the following: 1. Inspection Records and photographs for pipe trenches and bedding, including underdrains. 2. Video Pipe Inspection for any pipes which are not accessible or viewable. 3. Updated Location with geocoordinates of all facilities. 4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities. 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 requires for alterations from the design. 6. Plants, location and type. 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the installed type of drainage structures e size weirs materials inlets or end treatment s 8 culvert/ i P P inlet and outlet protection, alignment and invert elevations compared to design. 8. Computations: For significant deviations from design, provide sealed computations verifying that the as -built condition is equivalent or better than design. 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical sections and linings. 10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage must be within platted easements. Provide copies of recorded documents. 11. Guardrail, fences or other safety provisions - Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied end treatments, compared to design. 12. Material layers - biofilter media, stone layers, sand layers, keyways and cores must be verified as to material types and depths. Include inspection reports, boring or test pit reports and materials certifications. Biofilter media must be an approved state mix. 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are required to verify fill compaction in dams. 15. Manufacturers certifications for proprietary BRIP's certifying proper installation and functioning. • shown aub optional plate HDPE structural plaetle. rritb '/R" holes and 1/4- plate luteclured by Plastic Ilion Inc. or equal PLASTIC SOLUTIONS P'O. Box 4386 kincmater t'A 22604 INC. 877-877-D727 rn.pleelie-rNIAe4.eam EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE's SOILS, A SITE VISIT, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DEQ APPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGN PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW AND ON THIS SHEET, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT A MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF 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 FILLARFAS. 15' WIDE VDOT CL. AI RIPRAP LINED EMERGENCY SPILLWAY WITH FILTER FABRIC UNDERLAYMENT, CREST ELEV.=453.80' 46o 46o 455 455 Q 450 450 EXISTING GRADE 445 445 W W It Ol w w O d v Or I v l7 l7 a a w LL Elevation (ft) Basin A Contours, (sf) Volume (cf) 451 3 0 452 253 95 453 798 595 454 1,530 1,739 454.5 2,091 - 455 455.67 Elevation (ft) Basin B Contours, (sf) Volume (cf) 451 42 0 452 275 141 453 703 614 454 1,356 1,626 454.5 1,923 2,441 455 2,234 3,480 455.67 2725 5,138 Elevation (ft) Total Facility Contours, (sf) Volume (cf) 451 45 0 452 528 242 453 1,501 1,215 454 2,886 3,372 454.5 4,014 5,089 455 2,234 6,629 455.67 2725 8,288 ORMWATER MANAGEMENT BASIN 'A' DETAIL, SCALE V=20' PROPOSED BASIN W. BASIN W IS INTERCONNECTED WITH BASIN'B' VI / SHARED ELEVATIONS AND OVERSIZE , (1) FREE FLOWING RISERS AND BARRE ® i TOP OF DAM ELEV.=454.80' f ILM / 15' WIDE VDOT CL. AI RIPRAP LINED EMERGENCY SPILLWAYM WITH 4:1 SIDE SLOPES, FILTER FABRIC UNDERLAYMENT & r,A R5 5Ag / M CREST ELEV.=453.80'. SPILLWAY TO OUTFALL INTO r ROADSIDE DITCH & ENTER STRUCTURE EX-1. c v TO PREVENT FLOTATION THE RISER BASE �'V SHALL BE FIRMLY EMBEDDED 6" INTO AN 181, P _ THICK REINFORCED CONCRETE FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. 2 PROPOSED 048" STANDPIPE WITH TRASHRACK SHALL SERVE AS THE I RISER STRUCTURE (STR. 4). RISER TO INCLUDE (1) ONE 02- PROPOSED BASIN FLOOR SHALL BE SLOPED TO 16" c DRAIN TO THE RISER (0.50% MIN.), TYPICAL. I,(/ I LOW -FLOW ORIFICE WITH AN INVERT ELEV.=451.00'. ALL ORIFICES CONTRACTOR SHALL INSTALL A GENTLY SLOPED I / 3 , / SHALL HAVE STATE -APPROVED TRASHRACKS. SEE THE DETAIL ON CHANNEL AT THE BASIN's LOW POINT TO ) ,t THIS SHEET, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. ENSURE POSITIVE DRAINAGE THROUGHOUT, TYP. AirI \ I V' I / h PROP�SED VARI BLE / � �\ �WInTFd SWM RAf�FSS \\4 \\ I PROPOSED BASINS'A'AND'B' OUTFACE DIRECTLY INTO EXISTING \� - / SOF BASID PROTIL R 'EX-i' ASCALED PROFILE \ STORM SEWER INLET - STR. EX-1PROPOSEDFOUR (y) 2' WIDE CURB •\ \ CUTS WITH VDOTCL. Al RIPRAP LINING & FILTER FABRIC UNDERLAYMENT / \ I I /MATCHLINE SEE EL STORMWATER MANAGEMENT BASIN 'B' DETAIL, SCALE 1"=20' MATCHLINE SEE OVE Ili P f I I , / SEE THIS SHEET FOR- y 1 s / ASCALED PROFILE 2TT G'G' I I OF BASIN B-, TYP. \ PROPOSED 4'WIDE VDOT CL. Al RIPRAP \ LINING &FILTER FABRIC UNDERLAYMENT � \ 455/�67 E P ® CURB CUIS= 6 ALONG CHANNEL CENTERLINE DAM OVERTOPPING BELOW EFFE) �r I I I I I' IASE PROPOSEDTHREE I I 1URB 1 I CUTS WITH VDOT CL Al RIPRAP LINING / ;.. PROPOSED VARIABLE /' & FILTER FABRIC UNDERLAYMENT W/ /IDTHSM&AccESS� I I I II II I I I V I 3 ESMT. V I PROPOSED BASIN 'B'. BASIN 'B' IS / / N INTERCONNECTED WITH BASIN W VIA X A / fW N SHARED ELEVATIONS AND OVERSIZED FREE FLOWING RISERS AND BARRELS. 456 // I 1 1 a TOP OF DAM ELEV.=455.67' A PROPOSED FLOOR SHALL BE SLOPED O S RISER (0.50%0% MIN.),IN DRAIN TO THETYPICAL. _ / / ( CONTRACTOR SHALL INSTALL A GENTLY SLOPED �\ Let CHANNEL AT THE BASIN's LOW POINT TO ENSURE POSITIVE DRAINAGE THROUGHOUT, TYP. \ N e • a s I I I I. II Ili - / / / P Ai to I I TO PREVENT FLOTATION THE RISER BASE a h +60 SHALL BE FIRMLY EMBEDDED 6" INTO AN Is" THICK REINFORCED CONCRETE FOUNDATION ) THAT IS 8'x8', AND BURIED BELOW GROUND. I / q- 6 PROPOSED 48" STANDPIPE WITH TRASHRACK SHALL SERVE AS THE RISER STRUCTURE (STR. 8). RISER TO \ \ INCLUDE (1) ONE 02-16" LOW -FLOW ORIFICE WITH AN 9I - 3+ INVERT ELEV.=451.00'. RISER TOP=452.80' WITH A 024" s I ----'-- INVERT OUT=448.48'. ALL ORIFICES SHALL HAVE ---- / STATE -APPROVED TRASHRACKS. SEE THE DETAIL ON THIS C9 I SHEET, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. I I s� STII VDOT MH-1 TP=454-75 INV IN: 446.28 TO 1o� INV IN: 446.28 TO 4 oROPOSED BASIN 'A' INV OUT: 446.18 TO EX-i TOP OF DAM ELEV.=454.80' PROPOSED 048" STANDPIPE WITH TRASHRACK SHALL_ SERVEAS THE RISER STRUCTURE STR. 4). RISER TO INCLUDE (1) ONE 02- l66" LOW -FLOW ORIFICE WITH AN INVERT ELEV. 451.00'. ALL ORIFICES SHALL HAVE TRASHRACKS. SEE THE DETAIL ON THIS SHEET, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. STR:EX-i- �PROPOSED EXISTING INLET GRADE TP=448.85 INV IN: 445.66 TO 2 EX INV IN: 445-59 EX IN OUT: 6 445 5 CONTRACTOR SHALL CONNECT PROPOSED STR. 1 INTO EXISTING INLET 24" WATERTIGHT HDPE 69.79 LF Qa 0.75% SPILLWAY 470 470 PROPOSED BASIN 'B' T OF D. It O coo HAS HAS A LOW P INT LOCATED AT PROPO/S D CURB CUT, 465 OO t0 ELEV.=45 .67'(1' BELOW THE F ri PROPOSED BASI14 'A' TOP OF '0O a) AM ELEV.=454.8 ' (WITH A 15, O F- i IDE VDOT CL. Al RIPRAP LINED 1P �F- �� 100-yr PEAK EMERGENCY SPILLWAY WITH � O I - Q F > > 10-yr PEAK ILTER FABRIC U DERLAYMENT o EXISTING o_ 2-yr PEAK 1N 460 & A CREST ELEV. =453.80') oNo tF- GRADE > Z Z / 1-yr PEAK W awzO / Flna» / lnWF- ZZ / 4 455 PROPOSED GRADE 100-yr PEAK WSE=453.03 10-yr PEAK WSE=452.91 PROPOSED BF 2-yr PEAK WSE=452.83 DRAIN TO THI 450 _ - - 1-yr PEAK WSE=452.77 CONTRACTOR / - CHANNELS A _ _ - - - - - - ENSURE POSI - - - - - - - - - - - PROPOSED 048"1 24 HDPE SHALL SERVE AS 24' HDPE STORM SEWE 96.47 LF @ 0.75°� RISER TO INCLU[ 445 LF r7a o•75% o-Y HGL ORIFICE WITH AI 118J3 TOP=452.80' WI' z4" HDPE TO PREVENT FLO ATION THE RISE BASE SHALL BE IRMLY ALL ORIFICES SF 2 18. LF 2.110/O EMBEDDED 6" IN 0 AN 18" THICK REINFORCED CO CRETE THE DETAIL ON l 44 44 FOUNDATION THAT IS 8'x8', AND URIED BELOW GROUND. FOR ADDITIONAL .t N r1 o Q> v m N ri a) Ol O o 't .11 It Li,O a a a s 0+50 1+00 1+50 2+00 2+50 3+00 PROFILE SCALES STR 8 - EX 1 1"=50 ((H WSE=453.03 VSE=452.91 SE=452.83 SE=452.77 -CONTRACTOR SHALL INSTALL THE EMBANKMENTS IN ACCORDANCE w/THE DESIGNS SHOWN ON THIS SHEET, TYP. ,SINS' FLOORS SHALL BE SLOPED TO RISERS (0.50% MIN.), TYPICAL. SHALL INSTALL GENTLY SLOPED f THE BASINS' LOW POINTS TO TIVE DRAINAGE THROUGHOUT, TYP. STANDPIPE WITH TRASHRACK THE RISER STRUCTURE (STR. 8). )E (1) ONE 02- i6',, LOW -FLOW J INVERT ELEV.=451.00'. RISER -H A 024" INVERT OUT=448.48'. ALL HAVE TRASHRACKS. SEE 'HIS SHEET, OR EQUIVALENT, INFORMATION. SCOTT/R. Ct?LLIN: Lic. No. 035791 ?� 12/4/20 0 N CD N '1 0 z J a aO ,,AA d CO m Y/ COZ Ln En En LU Z a f O Z Z > > O V In a N Q w C, Z LU > w W w L97- r M co N ® M N WN \N W / J J LU Ln O 2 U WLij Y �n n: V) I J I� TI Q rI LU Q ~ z O sw L J �w Q z U) w Q z � WV/ Uj f�L I U J 1� J 0 w C3 w CCc x CL In JOB NO. 202179 SCALE AS SHOWN SHEET NO. S