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HomeMy WebLinkAboutWPO201900003 Plan - VSMP WPO VSMP 2019-06-19., t OWNER. MARSHALL, MICHAEL J OR ALICE R 1335 PLEASANT GREEN STREET CROZET, WRGINIA 22932 DEVELOPER. STANLEY MAR71N HOMES 404 PEOPLE PLACE, SUI7E 303 CHARLOTTE SWLL& VA 22911 ENGINEER. COLLINS ENGINEERING_ 200 GARRETT ST, SU17E K CHARLs}OTTESVI L¢gLE, VA 22902 (434)293-3719 TAX MAP NO.: 56A--1-26 (4,403 AC) 56A1-1-26B (1.865 AC) 56AI-1-30 (2.258 AC) 56A1-1-30A (2.838 AC) 58AI-1-29A (0.604 AC) 56A1-1-29 (1.146 AC) 56AI-1-31 (0.696 AC) 56AI-1--27 (0.680 AC) 56A 1-1-28 (0.539 AC) 56A I -1-28A (01566 AC) 56AI -1-36 (0589 AC) 56A1-1-36A (0.4J4 AC) 56A1-1-36B (0.40 AC) EXIS77NG RIW TO BE ABANDONED FOR WAYLAND ROAD, BURFORD ROAD (POR77ON OF) AND McCOMB ROAD (TOTAL RIW 1.929 ACRES) TOTAL AREA: 18.347 ACRES TOTAL AREA PHASE 1 -9.732 ACRES TOTAL AREA PHASE If (RESIDUE) r 8.615 ACRES ZONING: R-6 RESIDEN77AL, STANDARD LEVEL -- CLUSTER DEVELOPMENT PROPOSED USE. SINGLE FAMILY ATTACHED RESIDEN77AL UNITS (VILLA UNITS AND TH UNITS) DENSITY- ALLOWABLE DENSITY FOR STANDARD LEVEL CLUSTER DEVELOPMENT-6 DU,,7AC 18.J47 ACRES x 6 UNITS % ACRE = 110 UNITS ALLOWED PHASE 1: 50 PROPOSED UNITS + I EXISTING BUILDING = 51 TOTAL UNITS PROPOSED PHASE I DENSITY 51 UNIT519! 732 AC (5.2 DWELLING UNITSIACRE) NOTE. CHANGE OF USE PERMITS WILL BE REQUIRED FOR THE 7W0 EXISTING STRUC7IlRES SHOWN ON THE PLAN TO BE CONVERTED FOR USE BY THE NEIGHBORHOOD - OPEN SPA CE: TOTAL PHASE I OPEN SPACE PROPOSED - :' TOTAL pHAsE I OPEN SPACEREQUIRED OPEN SPACE 70 BE O*NED AND MAINTAINED y THE HOME014NERS ASSOCIA770M ALL P .: ! IN A DEED ! FOR THE COMMONOF ! O)WERS IN THE SUBDIWSION AND NO OPEN SPACE IS PROPOSED TO BE DEDICATED PUBLIC SPACE. PRE SERVEDAANAGED SLOPES NO PRESERVED SLOPES OR MANAGED SLOPES EXIST WITHIN THE LIMITS OF THE PROPERTY, OFF -SITE PRESERVED AND MANAGED STEEP SLOPES HAVE BEEN SHOWN & LABELED ON THE EXIS77NG COND177ONS SHEET; BUILDING HEIGHTS: MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET SETBACKS. • FRONT 5' MINIMUM (25' A9AXIMU�1f FRO R,�'1�Y OR EDGE OF SIDEWALK) SIDE: NONE - MIN. 10' BUILDING SEPARA7iON (ANY BUILDING THAT EXCEEDS 35' IN HEIGHT SHALL BE SEPARATED FROM ANY OTHER BUILDING BY 10' PLUS 1' FOR EACH FOOT THE BUILDING EXCEEDS 35' IN HEIGHT) REAR: 20' MINIMUM GARAGE., 18' MINIMUM FROM THE R/W OR THE EXTERIOR EDGE OF THE SIDEWALK SUBDIVISION STREETS. & GUTTER WATERSHED: LICKINGHOLE CREEK WATER SUPPLY WATERSHED AGRICULTURALI FORESTAL DISTRICT NONE 70PO & SURVEY- THE BOUNDARY LINE; PARCEL INFORMA77ON AND TOPOGRAPHY WERE PROVIDED BY ROUDABUSH, GALE AND ASSOCIATES IN JANUARY OF 2019. INFORMA77ON WAS FIELD VERIFIED BY COLLINS ENGINEERING IN JANUARY OF 2019. DATUM. NAD 83 EXIS77NG VEGETATION: PARTIALLY WOODED WTH (2) RESIDENCES ON THE PROPERTY AND EXISTING GRAVEL DRIVEWAYS LIGHTING. NO STREET LIGH77NG IS PROPOSED WTH THE DEVELOPMENT, HOWEVER, ANY LIGHTS OVER 3000 LUMENS DUST MEET THE REQUIREMENTS OF SEC770N 4.17 AND BE FULL CUT OFF. PARKING. 50 SFA UNITS + I EXIS77NO DWELLING w 102 OFF-STREET PARKING SPACES REQUIRED MINIMUM (1) DRIVEWAY SPACE + (1) GARAGE SPACE TOTAL PARKING PROVIDED: 102 OFF-STREET PARKING SPACES GUEST SPACES: I SPACE PER 4 UNITS r 13 SPACES REQUIRED GUEST PARKING SPACES (ON -STREET PARKING) - 37 SPACES CLUBHOUSE PARKING SPACES PROVDED m 26 SPACES TOTAL GUEST PARKING PROVIDED = 63 SPACES PHASING. THIS PROPERTY SHALL BE DEVELOPED W17TNIN 2 PHASES. CURRENTLY, THIS PROPOSED PLAN INCLUDES (1) PHASE, AND PHASE 2 WILL BE THE RESIDUE PARCELS. BUILDING SITES. PARCELS 1-50 EACH CONTAIN A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENITS OF SEC77ON 4 2 1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE: BURIAL SITES.- A CEMETERY EXISTS ON THE RESIDUE PROPERTY ('PARCEL TMP 56A-1-26). THE CEMETERY SHALL REMAIN AND WILL BE PRESERVED NTH THE DEVELOPMENT. STREAM BUFFERS: THE 1001 STREAM BUFFERS SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE FLOODPLAIN° A POR7701v OF THE RESIDUE PROPERTY IS LOCATED WITHIN A FLOOOPLAIN ZONE AS SHOWN ON FEMA MAP51O03C0.229D, DATED FEBRUARY 4, 2005. RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WTH THE DEVELOPMENT LANDSCAPING: STREET TREES ARE PROPOSED WTH THE ROAD PLAN ALONG THE NEIGHBORHOOD STREETS IN ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS SET FORTH IN SECTION 32.7 9 OF THE COUNTY CODE: TRASH: EACH LOT SHALL HAVE AN INDIVIDUAL TRASH CONTAINER RECREA77ON AREA: PROPOSED 2.55 ACRES (OPEN SPACE A). THIS RECREA77ONAL AREA WILL INCLUDE A CLUBHOUSE, OPEN FIELD FOR AC77VE RECREATION, A TOT LOT (MIN 10,000 sf), AND AN OUTDOOR PA770IMEE77MG AREA WTH A FIRE PIT. TOT LOT AREA SHALL INCLUDE THE FOLLOWING (AT A MINIMUM): ONE (1) SWING (FOUR SEATS), ONE (1) SLIDE WITH TWO (2) CLIMBERSy ONE (1) BUCKABOUT OR WARL & TWO (2) BENCHES OPEN SPACE.- RECREATION AREA OPEN SPACE (OPEN SPACE A): 110,922 sf (2.55 aa) ADDITIONAL OPEN SPACE: AREA B. 8,698 sf (020 Sac), AREA C. 21,557 of (0.49 00.) AND AREA D. 13,788 sf (0.32 ace) TOTAL PHASE I OPEN SPACE, 154,965 sf (3 56 ac) - 36.58X OPEN SPACE (MIN. REQUIRED = 25X) IMPERVIOUS AREAS • Existing Building & Structures - 2,975 sf Proposed Roadway & Parking Lot 75,500 sf Proposed Sidewalk 23,375 sf Proposed Buildings 56,520 sf Proposed Driveways 17,800 sf Future ImperviousAreas 10,650 sf Emergency Access Road 11,575 sf 198,395 sf (47% of Phase 1) 4.55 ac. PROPOSED USES: L07S: 145,104 SF (3.33 AC) ROARS (R7W). 123,864 SF (2.84 AC) OPEN SPACE 44,043 SF (1.01 AC) RECREA77ON AREA: 110,922 SF' (2.55 AC) OFFSITF EASEMENT ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR W THIN EXIS77NG RIGHT-OF-WAY. NO OFF51TE EASEMENTS ARE PROPOSED W7-H THIS DEVELOPMENT. NOTES. 1) THIS PROPERTY DOES !T LIE WTHIN AN AGRICULTURAL AND ! • FOREST DISTRICT ONLY DWELLING PER LOT SHALL BE PERWITTED. EDITION.3) ALL PROPOSED EASEMENTS S14ALL BE DEDICATED TO PUBLIC USE. 4) STREET TREES SHALL BE PROWDED ALONG ALL 774E PUBLIC STREETS 40- ac. IN ACCORDANCE WTH VVOT AND ALBEMARLE COUNTY STANDARDS 5) ITE TRIP GENERATION: TRAFFIC IMPACT NUMBERS ARE BASED ON THE ITE TRIP GENERATION MANUAL, • • WERE USED FOR THE DEVELOPMENT ROP ► 50 DWELLING ADT -ATE - 5.86 VPD PER DU = 293 ADT, AM PEAK +, :. VPH w PM PEAK RATE - 0.52 VPH PER DU = 26 PROPERTY6) THIS IS NOT! Y, ZONE. WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGI'I%N'IIA SHEET LAYOUT ,• ry4 may) gy b''.'' '+,7k9i➢1� ����'s•`� a ,i �' b! 'a .�4e ,,d..L9�190�1�5 Date F, Sheet List Table Sheet Number Sheet Tale 1 COMER 2 EXISTING CONDITIONS & DEMOLITION PLAN 3 EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS 4 PHASE I EROSION & SEDIMENT CONTROL PLAN 5 PHASES II & III EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL DETAILS 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT DETAILS 9 STORMWATER MANAGEMENT DETAILS 9A EMERGENCY ACCESS PLAN 10 STORMWATER MANAGEMENT PLAN- ONE PERCENT PLAN LI'END EROSION COWROL PLAWMET"RI SA SAFETY FENCE 3.01 - EDGE OF PA VEMEN T CR STABI IZA 77ON ROA!? 3.03 CURB N_. BOUNDARY s-:;rS �'�.:>ss_�.5;'<....''�a SOIL UVU/YDARY CE CONSTRUC770N ENTRANCE 3.02 BUILDING SF SIL T FENCE 3.05 ---- ` : : > . PROPOSED ASPHALT lP INLET PR07EC77ON 3.07 STREAM BANKS DD TEMPORARY DIVERSION DIKE 3.09 ®� 100' WPO BUFFER PROPOSED EASEMENT, TEMPORARY RIGHT-OF-WAY J. II VARIES WITH SHEET DIVERSION DRAINAGE PIPE SOT TEMPORARY SEDIMENT TRAP J.13 BENCH MARK SB SEDIMENT BASIN 3.14 VDOT STANDARD STOP SIGN opOUTLET PR07EC77ON 318 PROPOSED HANDICAP PARKING SPACE STRIPING S RIPRAP 3.19 @ INLET PROTECTION RR U77LITY STREAM CROSSING 3,25 -- - -200-- - EXIS77NG CONTOUR 5A TEMPORARY SEEDING 3.31 200 PROPOSED CONTOUR S PERMANENT SEEDING 3.32 � SEDIMENT TRAP OR BASIN TREE PRESERVA77ON AND PR07EC77ON 3.38 DRAINAGE DIVIDE LIMITS OF CLEARINGIGRADIN( DC DUST CONTROL 3.39 LIMITS OF DISTURBANCE DIVERSION DIKE WRGINIA EROSION do SEDIMENT CONTROL HANDBOOK SPECIRCA77ON NUMBER RIGHT -OF WA Y DI VERSION TREE PROTEC77ON SAFETY FENCE SILT FENCE K .... u PROPERTY LINE ° PROPOSED CONCRETE 0 O O O 0 Q (D 100 YR. 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THE PLAN APPROVING AU7HOR/TY MUST BE N077RED ONE WEEK PRIOR TO THE SEDIMENT CONTROL MEASURES: 8WAM: QcscmvD& pRE_CmsmUCnoN CoNffRENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND 7HE PURPOSE OF THIS LAND DISTURBANCE AC71WTY IS TO CONSIRUCT RESIDEN77AL HOMES AND THEIR CORRESPONDING S7RUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES SHALL BE IN DIS7URBING AC77V`Tn AND ONE WEEK PRIOR TO THE FINAL INSPEC77ON INFRASTRUCTURE, THIS PROJECT PROPOSES TO DISTURB 13 15 oc. OF LAND THE PROJECT WILL BEGIN ITS CONS7RUC770N NTH THE ACCORDANCE KITH THE VIRGINIA EROSION AND SEDIMENT C0N7RCL HANDBOOK. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONS7RUCTED AND PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS AN77CIPATED TO BE IN THE SPRING OF 2019. THE STRUCTURAL PRAC77CES USED IN THIS SEC77ON coNslsr OF THE Fouoma MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECInCA770NS OF THE WRGINJA EROSION AND SEDIMENT CONTROL MEASURES-: WaRK IS AN71CIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE IN THE FALLIWINhER OF 2020. THE CONVERSION OF EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA77ONS VR IT IS AN77CIPA7ED THAT THE CON7RACTOR WLL USE A CONSTRUCTION ENTRANCE, 7HE TEMPORARY SEDIMENT BASIN 70 A PERMANENT SM FACILITY MA Y OCCUR A T A LA TER DA 7E IF PHASE HIS CCNS`7RUCI70N J.01 SAFETY.FMCE A PR07EC77VE HARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION C010ROL 3. 625-02-00 EROSION AND SEDIMENT CON7ROL REGULARONS, ALL EROSION AND SEDIMENT CON7ROL MEASURES ARE TO BE PLACED PRIOR TO OR RIPRAP, OUTLET PROTECTION, DIVERSIONS, TWO SEDIMENT 7`RAPS, A SEDIMENT BASINA OCCURS DURING THIS 77ME FRAME MEASURE. TO PROHIBIT 7HE UNDESIRABLE USE OF AN EROSION CON7ROL MEASURE By AS THE FIRST STEP IN CLEARING. UTILITY STREAM CROSSING, INLET PROTECTIONS AND SILT FENCES TO CONTROL SUR FA CE ZWG UTE Q2277ONS. THE PUBLIC. APPLICABLE TO ANY CONIROL MEASURE OR SERIES OF MEASURES WHICH 4 A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE DRAINAGE 7EMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND 77-IE AREA OF THE PROPOSED DEVELOPMENT CONSISTS OF OPEN RELDS AND EXIS77NG WOODS N7H LIGHT UNDERBRUSH 7HIS S17E CAN BE CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC, MAINTAINED ON THE S17E AT ALL 77MES. DISTURBANCE AC77W77ES. STOCKPILE LOCA71ONS SHALL BE ON S17F AND SHALL BE GENERALLY SLOPES FROM THE NORTH TO POWELLS CREEK LOCA7ED ALONG THE WESTERN PROPERTY LINE. THE S17E IS GENERALLY 3.02 CONSTRUCRUN ENMA=- 5. PRIOR TO COMMENCING LAND DIS71JRBING AC77W77ES IN AREAS 07HER THAN INDICATED ON 7HESE PLANS (INCLUDING, BUT NOT LIM17ED To, OFF-slIE BORROW OR TA CO R MPORARY STOCKPILE AREAS THAT STABILIZED W17H A TEMPORARY VEGE 77VE VE . TE GENTLY SLOPED AND IS WELL DRAINED. Ap NT AgfAS,. kjA CE A STABILIZED GRAVEL CONSIRUC77ON EN7RANCE LOCATED AT POINTS OF VEHICULAR WASTE AREAS), THE CON7RACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION ARE USED FOR STORING SOIL UN71L A LATER 77ME FOR SPREADING WfLL REQUIRE THIS S17E IS BORDERED ON THE EAST BY RAILROAD TRACKS AND POWELLS CREEKS ON THE WEST S0U7H OF THE PROPOSED S17E IS INGRESS AND EGRESS ON A C0NS7RUC77ON SITE. To REDUCE THE AMOUNT OF MUD CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY 774E PLAN APPROVING MAIN7ENANCE & SHALL BE SURROUNDED BY SILT FENCE AT ALL 77MES. PERMANENT BLUE RIDGE AVENUE AND FOUR RESIDEN77AL LOTS. NORTH OF 7HE PROPOSED DEVELOPMENT IS LAND THAT WILL BE USED FOR PHASE 7RANSPOR7ED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSIRUC77ON EN7RANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE AUIHORW. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA7701V OF ANY ADD1770MAL EROSION Iff 7E SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH LL NO LONGER BE EXCAVA D If OF 7741S DEVELOPMENT THIS NORTHERN LAND IS CURREN77-Y OCCUPIED BY RESIDEN77AL HOMES 7HAT ARE LOCATED ONSITE. SILT FrNcE m7H wRE BACKING, DIVERSIONS, A SEDIMENT TRAP, A SEDIMENT BASIN, INLET CON7ROLS AND VARIOUS OTHER ESC MEASURES THE AMOUNT SEDIMENT 7RANSPORIED ONTO PUBLIC ROADWAYS. . CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA 77ON AS AND WHERE CONS77?UC770N AC77V777ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO ARE PROPOSED TO LIMIT THE P07EN77AL FOR CONTAYINA77ON OF 77-IESE ADJACENT PROPER77ES AND WATERWAYS. DETERMINED BY THE PLAN APPROVING AUTHORITY BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LETT DORMANT FOR A YEAR QRMZZ: Lj6NQ DISERVAN= 3.03 0ONS7RUC77ON ROAD STABILIZAIZON-' THE 7EMPORARY STABILIZA77ON OF ACCESS ROADS, SUBDIVISfON ROADS, PARKING Z ALL DIS77JRBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CIONTYOL MEASURES DURING LAND D/57URBING AC77W77ES AND DURING S17E DEVELOPMENT OR MORE SELEC77ON OF SEED MIX77JRE WILL DEPEND ON 774E 77ME OF YEAR APPLIED OFFS17E LAND DISIURBANCE IS LIM17ED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED W77HIN 7HE OVERALL PLEASANT GREEN AREAS, AND OIHER S17E VEHICLE 7RANSPORTA77ON ROUTES NTH STONE IMMEDIATELY AT ALL 77MES UN77L FINAL STABILIZA77ON IS ACHIEVED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE BOUNDARY AFTER GRADING. To REDUCE EROSION OF TEMPORARY ROADBEDS BY C0NS7RUC710N TRAFIRC DURING WET WEA 7HER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED NTH 52UL SEE SOIL DESCRIP77ONS ON 7HIS PAGE AND THE PHASE I EROSION & SEDIMENT CONTROL PLAN FOR BOUNDARIES, SOIL T-rPES AND OF PERMANENT ROADBEDS BETWEEN 7HE 77ME OF IN177AL GRADING AND FINAL 9. FILTERING DEWCE. Y THE CONTRACTOR SHALL INSPECT ALL EROSION coN7RQL MEASURES PERIODICALL FAST GERMINA 77NG VEGETA 77ON IMMEDIA TEL Y FOLLOWING GRADING OF 7HOSE AREAS. GENERAL SOIL DETAILS. STABILIZA770N. UsE wjEREVER STONE -BASE ROADS OR PARKING AREAS ARE AND AFTER EACH RUNOFF­PR0DUC4NG RAINFALL EVENT ANY NECESSARY REPAIRS OR SELEC77ON OF SEED MIXTURE MLL DEPEND ON 771E TIME OF YEAR APPLIED. 77CAL ARE12 CONS7RUC7ED, WIE77-IER PERMANENT OR TSUPORARY, FOR USE BY CONS7RUC77CN CLEANUP To MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL POWELLS CREEK AND ITS IMMEDIATELY ADJACENT WETLANDS ARE LOCATED ON THE PROPERTY THESE ARE LOCATED DOWAIGRADIENT 7RAMC. BE MADE IMMEDIA7ELY J.01 SAFETY FENCE - SAFETY FENCE IS PROPOSED AROUND THE SEDIMENT BASIN AND FROM 774E PROPOSED DEVELOPMENT AND ARE CONSIDERED CRI77CALLY SENS177W AREAS. THE EXIS77NG BLUE RIDGE AVENUE, 10. ALL FILL MA TERIAL TO BE TAKEN FROM AN APPROVED, DESIGNA TED BORROW AREA. ADJACENT RESIDEN77AL LOTS, THE RAILROAD 7RACKSIPROPERTY AND THE EXIS77NG ONS17E S7RUCTURES PROPOSED TO REMAIN NTH J.06 SILT EEMM A TEMPORARY SEDIMENT BARRIER COIVSIS77NG OF A SMTHE77C FILTER FABRIC 11. ALL WASTE MATERIALS S14ALL BE TAKEN TO AN APPROVED WASTE AREA. EAR77-1 FILL SEDIMENT 7RAP. PHASE I ARE ALSO CRI77CAL AREAS. THE CON7RACTOR SHALL GIVE EX77?A ATTEN770N AND CAU77ON IN AND AROUND 774ESE CRI77CAL S7RE7rHE0 ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND EN7RENCHED, TO SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, S7UMPS, MOD, RUBBISH, AND J.02 CONS7RUC77ON ENTRANCE - To REDUCE THE AA40UNT OF MUD 7RANSPORTED AREAS TO ENSURE SEDIMENT IS NOT DEPOS17ED ON THEM. 7REE PR07EC77ON FENC4NG, SILT FENCING, DIVERSIONS AND SEDIMENT INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING OTHER DEBRIS. ONTO PAVED PUBLIC ROADS BY A40 TOR VEHICLES OR RUNOFF TRAPPING DEWCES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND DIS77JRSANCE TO ENSURE THESE CRI77CAL AREAS ARE CONS7RU0770N OPERA77ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, 12 BORROW OR WASTE AREAS ARE TO BE RECLAIMED WTHIN 7 DAYS OF COMPLE77ON 3.03 CONS7RUCRON ROAD STABILIZA'RON - To REDUCE THE EROSION OF TEMPORARY MAINTAINED. AND To DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-70-MODERAIE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DONN SLOPE OF 13, PER ZONING ORDINANCE SEC77ON 5.1.28. ALL INERT MATERIALS SHALL BE TRANSPOR7ED IN COMPLIANCE WTH SECnON 13-JOY ROADBEDS BY CONSTRUCRON TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUEA IT UENCE OF Q=TRUC0& 1. CONTRACTOR SHALL N07IFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPAR7MENT TO SCHEDULE A AREAS NTH MINIMAL GRADES TO FILIER SEDIMENT LADEN RUNOFF FROM SHEET FLOW OF 774E CODE OF ALBEMARLE. REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF IN177AL GRADING AND PRE­C0NS7RUC77ON MEE77NG AS INDICA TED. 7HEY SHALL BE INSPE07ED IMMEDIA TEL Y AF7FR EACH RAINFALL AND 14. BORROW, FILL OR WASTE AC77WTY INVOLVING INDUSTRIAL- TYPE POWER EQUIPMENT FINAL STABILIZARON- CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE 2. PRIOR TV DIS7URBANCES, THE LIMITS OF DIS7URBANCE SHALL BE FLAGGED AND IRE 7REE PR07EC77ON FENCING SHALL BE MAINTAINED IN ACCORDANCE NTH 7HE WRGINIA EROSION & SEDIMENT CONIROL HANDBOOK (VESCH). 15. SHALL BE LIMITED TO 774E HOURS OF 7:00 AM TO 9:00 PM. BORROW, FILL OR WASTE A077WTY SHALL BE CONDUCTED IN A SAFE MANNER THAT CONTRACTOR PARKING & STAGING AREAS AS NEEDED. INSTALLED. W77HOUT THE APPROVAL FROM THE MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, J.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. J. NO EROSION CON7ROL MEASURES MAY BE REMOVED DURING 774E CONSTTUC770N PROCESS INSPECTOR ON THE PROJECT 107 SMEM DRAIN INLET PROTECROk A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. J.07 STORM DRAIN INLET PROTECRON- STORM DRAIN INLET PR07EC77ON IS SHOWN ON 4. INSTALLA77ON OF THE PROPOSED CONSTRUC71ON ENTRANCE SHALL OCCUR NEXT THE CONTRACTOR SHALL APPLY CONSTRUC77ON DROP INLET OR CURB INLET TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR THE PLANS WIEN INLETS ARE CONS7RUCTED BUT THEIR SITE's CON7??1BU77NG DRAINAGE ROAD STABILIZA77ON AS NEEDED TO THE CCNSTRUC710N EN7RANCE AND CON77?ACTOR PARKING/ STAGING AREA. CON7RACTOR SYS7EMS PRIOR TO PERMANENT STABILIZA 71ON OF 774E DISTURBED AREA. INLET CONVERT TO PERMANENT STORMWATER MANAGEMENT FACIL177ES WHERE APPLICABLE AREA IS STILL BEING STABILIZED. SHALL ENSURE THE CONS7RUC77ON EN7RANCE DRAINS TO AN ADEQUATE E&S MEASURE, AS SHOWN. C0NS7RUC770N EN7RANCE PROIEC77ON APPLIES WJERE STORM DRAIN INLETS ARE TO BE MADE OPERA 77ONAL ALL EROSION CON7ROL MEASURES REQUIRED BY IHIS PLAN REGARDLESS OF 7HE J. 11 7EMPORAR Y RICH T OF WA Y DI VERSION- A RIGH I- OF- WA Y DI VERSION IS PROPOSED TO BE INSTALLED WHERE CONSTTUC770N VEHICLE ROU7ES INTERSECT PAVED PUBLIC ROA DS, PROVISIONS SHALL BE MADE 70 I BEFORE PERMANENT STABIUZA 71ON OF THE CORRESPONDING DISTURBED DRA NA GE SALE OF ANY LOT, UNIT, BUILDING OR OTHER POR77ON OF 774E PROPERTY MINIMIZE 774E TRANSPORT OF SEDIMENT BY (WHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS AREA. IZ TEMPORARY STABILIZA 77ON SHALL BE TEMPGRAR Y SEEDING AND MULCHING. SEEDING ACROSS THE CONSTRUCRON ENTRANCE, WHERE SHOWN ON THE PLANS. 7RANSPORTED ONTO A PUBLIC ROAD SURFACE, 774E ROAD SHALL BE CLEANED 7HOROUGHLY AT 774E END OF EACH DAY IS TO BE AT 75 LBSIACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO 3.12 DIVERSION- PERIME7ER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SKEEPING AND 7RANSPOR77NG TO A SEDIMENT CONTROL J.11 7EMP-ORARYRL07�7OF-�--HMYDIW-R=K*. A RIDGE OF COMPACTED SOIL OR LOOSE - CK OR Gf?AVEL C0NS7RUC7FD ACROSS CONSIST A 50150 MIX OF ANNUAL RYGRASS AND CEREAL WNTER RY� OR IN MARCH 7HROUGH AUGUST TO CONSIST OF J. 13 SEDIMENT TRAP- TWO SEDIMENT 7RAPS ARE PROPOSED, AT THE LOW SIDES OF THE DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN 77-IIS MANNER. 5. THE IN177AL ESC CONS7RUC770N MEASURES, AS SHOWN ON THE PHASE I EROSION & SEDIMENT CON7ROL PLAN, SHALL BE DIS7URBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW I G 774 TE 77 W17HIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCN E EROSION PO N AL AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY GERMAN MILLET S7RAW MULCH IS TO BE APPLIED AT 80LBS11005F ALTERNA771VES PROJECT INSTALLED NEXT THE CON7RACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE ANO TREE PROTECTION. PERIMETER LENGTH BY DIVER77NG STORM RUNOFF TO A STABILIZED OUTLET GENERALLY, EARTHEN ARE SUBJECT TO APPROVAL BY THE EROSION CON7ROL INSPECTOR. J. 14 SEDIMENT BASIN- ONE SEDIMENT BASIN IS PROPOSED AT THE LOW SIDE OF 7HE MEASURES INTENDED TO 7RAP SEDIMENT SHALL BE C0NS7RUC7ED AS A FIRST STEP WTH ANY LAND DIS7URBANCE AC77VITY AND DIVERSIONS ARE APPLICABLE WHERE 7HERE WILL BE LITTLE OR NO C0NS7RUC770N 18. PERMANENT STABILIZA77ON SHALL BE LIME AND FER77LIZER, PERMANENT SEEDING, AND PROJECT SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DIS7URBANCE TAKES PLACE. 6 ONCE 7HE PERIME TER EROSION CON 7ROL SIL T FENCE AND 7REE PRO IEC 77ON HA VE BEEN INS TA LLED, A ND THE COUN TY 7RAF7:7c WITHIN THE RIGHT-OF-WAY GRAVEL S7RUC7URES ARE MORE APPLICABLE TO MULCH. AGRICUL 77JRAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS110005F. J. 18 OUTLET PR07EC77ON-OU77-ET PR07EC77ON IS PROPOSED AT THE OU77-ET OF 77-IE INSPECTOR HAS APPROVED 774ESE MEASURES, LIGHT CLEARING AND LAND DIS7URBANCE MAY BEGIN FOR THE REMAINING ROADS AND OIHER RIGHTS-0/7-WAY WHICH ACCOMMODATE WHICULAR 7RAFFIC. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FER77LIZER SHALL BE APPLIED AT SEDIMENT BASIN SEE THE ESC PLAN FOR THE DESIGN LOCA71ON. PERIMETER CON7ROLS, 7HE CONTTACTOR SHALL BEGIN WIN THE INSTALLA770N OF SEDIMENT BASIN 11 & SEDIMENT TRAP jfl. 12 D/ YOOOLBSIACRE AND CONSIST OF A 10-20-10 NU7RIENT MIX. PERMANENT SEEDING TALL j. 19 RIPRAP- RIPRAP IS PROPOSED AT 7HE OUTLET OF THE." SEDIMENT BASIN. FOLLOWING THE INSTALLAY70N OF 7HESE MEASURES, THE CONTRACYOR SHALL INSTALL 774EIR CONTRIBU77NG DIVERSIONS AND ANY J. VERSIM, A CHANNEL CONSTTUChED ACROSS A SLOPE NTH A SUPPOR77NG EAR7HEN RIDGE ON SHALL BE APPLIED AT 180LBSIACRE AND CONSIST OF 95Z KENTUCKY 31 OR FESCUE AND O-5X PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. S7??AIW MULCH IS 3.25 UTILITY S7REAM CROSSING- A UTILITY STREAM CROSSING 15 PROPOSED FOR THE REMAINING SILT FENCE FOLLOWING THIS, 7HE CON7RACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL /7EMS AS SHOW THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWA7ER RUNOFF TO STABILIZED OUTLETS AT NON -EROSIVE VELOCITIES, APPLIES TO BE APPLIED AT 80LBSIIOOSF AL7FRNAnVES ARE SUBJECT TO APPROVAL BY 7HE INSTALLATION OF THE SANITARY SEWER. ON THE PHASE I EROSION CONYROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. WHERE RUNOFF FROM AREAS OF HIGHER ELEVA 77ON MAY DAMAGE PROPERTY, CAUSE EROSION CON7RCL. INSPECTOR. AND AFTER EACH J.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED N 7H THIS 7. ONCE ALL THE PHASE I EROSIOiV CONTROL 17EMS HAVE BEEN INSTALLED & ARE OPERA77ONAL, DRAINAGE IS PROPERLY EROSION, OR INTERFERE NTH THE ESTABLISHMENT OF VFGET4770N ON LOWER AREAS; 19. MAINTENANCE, ALL MEASURES ARE To BE INSPECTED WEEKLY RAINFALL. ANY DAMAGE OR aoGGING TO S7RUC7URAL MEASURES IS TO BE REPAIRED PLAN. CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONn?ACTOR CAN BEGIN CLEARING AHERE SURFACE ANDIOR SHALLOW SUBSURFACE F? OW IS DAMAGfNG SLOPING UPLAND, AND 14HERE 7HE SLOPE LENGTH NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS IMMEDIATELY SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET S70RAGE 3.38 TREE PRESERVA77ON AND PRO7EC770N- 77?EE PR07EC77ON IS PROPOSED KI 7H THIS THE REMAINDER OF 774E SITE. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN BEGIN ROUGH GRADING 774E SITE TO THE CONTOURS SHOWN ON VOLUME IS FILLED NTH SEDIMENT ALL SEEDED AREAS ARE TO BE RESEEDED WHEN PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. THE PHASE 11 EROSION & SEDIMENT CON7ROL PLAN MEASURES INTENDED TO 7RAP SEDIMENT SHALL BE CONSTRUCTED AS A 3. 13 7EMPMRY SEDMENT ZRAP, NECESSARY TO ACMEW A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DWES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED 3.39 DUST CON7ROL-DUST CONTROL IS REQUIRED AND PROPOSED WTH MS PLAN. FIRST STEP KITH ANY LAND DISTURBANCE AC77WTY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE A 7EMPORARY PONDING AREA FORMED BY CONS7RUCTING AN EAR7HEN EMBANKMENT TAKES PLACE ADD/770NALLY, 7HE PREWOUSLY INSTALLED SEDIMENT BASIN, SEDIMENT 7RAP AND PERIMETER DIVERSIONS SHALL W77H A STONE OUTLET To DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DIS7URBED AND REPAIRED IMMEDIATELY 8 EM VED 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO E R 0 REMAIN OPERA 77ONAL AT ALL TIMES THROUGHOUT C0NS7RUC770N AND SHALL BE MAINTAINED THROUGHOUT THEIR LIFE CYCLES. AREAS LONG ENOUGH 70 ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT USE BELOW DIS77JRBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS WTHIN 30 DAYS OF FINAL S17E STABILIZATION, WHEN MEASURES ARE NO LONGER MAINENANCE., 7HIS WILL CON77NUE TO OCCUR IN EROSION & SEDIMENT CONTROL PHASE //. 9.. PERMANENT OR TEMPORARY SOIL STABILIZA770N SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL LESS THAN 3 ACRES, WHERE THE SEDIMENT 7RAP WILL BE USED NO LONGER THAN 18 MAY BE CONSTYUCTED E17HER INDEPENDENIL Y OR IN CONJUNC77ON 21. NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR THE S&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CON7ROLS AS IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL GRADE IS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STA81LIZA77ON SHALL RE APPLIED MT41N SEVEN DAYS TO MONTHS, AND IT DIVERSION DIKE NECESSARY IN THE FIELD AS S17E COND177ONS CHANGE. IN ADDITION, NO SEDIMENT EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AF7rER EACH SIGNIF7CANT DENUDED AREAS THA T MA Y NOT BE A T FINAL GRADE BUT MLL REMAIN DORMANT (UNDISTURBED) FOR LONGER 774AN 30 DA YS NTH A TEMPORARY BASIN OR TRAP CAN BE REA40VED WTHOUT WRITTEN AU774ORIZA770N. RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC PERMANENT STABILIZAnON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. A T7EN77ON WILL BE GIVEN TO 77-IE FOLLOWING ITSYS: 10. ONCE THE SITE IS ROUGH GRADED, THE CONTRACTOR SHALL BEGIN INSTALLA770M OF 7HE U77LITIES, CURB AND GUTTER, AND 3, 14 TEWOAR Y SFDJMEN T BA SM, A TEMPORARY BARRIER OR DAM WIH A CONTTOLLED STORUWA7ER RELEASE SOIL ACROSSSOIL DESCRIPTION a. SEDIMENT BASINS ANDIOR 7RAPS WILL BE CLEANED AND MAINTAINED IN CON7ROL HANDBOOK. ROADS. INLET PRO7EC7ION SHALL BE INSTALLED ON ALL INLETS IMMEDIATELY FOLLOWING THEIR CONS`7RUC770N. THE INLET PR07EC77ONS SHALL BE INSPECTED AF7ER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE S7RUC7URE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED A DRAINAGEWAY To DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS ACCORDANCE W7H THE WRGINIA EROSION & SEDIMENT b.ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SED114ENT BUILDUP THA T FILTER BECOMES CLOGGED WTH SEDIMENT SO 774AT IT NO LONGER ADEQUA7ELY PERFORMS 17SFUNC770N, THE STONE MUST BE IN '%ET- AND "DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO 7a- BRADDOCK LOAM-2 TO 7% SLOPES SOIL IS WELL DRAINED W17H A MEDIUM RUNOFF . TH WILL PREVENT PROPER DRAINAGE. IF 774E GRAVEL IS CLOGGED By SEDIMENT E PULLED AWAY AND CLEANED ANDIOR REPLACED. SETTLE OUT APPLIES BELOW DIS7URBED AREAS WERE THE TOTAL CON7RIBUING CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE GRAVEL WLL BE REA40VED AND CLEANED, OR IT WILL BE REPLACED. 11. THE CONIRACTOR SHALL COORDINATE THE 77MING OF L07S 47-50's CONSTRUC77ON M774 THE ESC INSPECTOR AND THE DRAINAGE AREA IS EQUAL To OR GREATER THAN THREE ACRES. 7HERE MUST BE DEPTH To THE WATER TABLE IS GENERALLY MORE THAN 80". ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR CONVERSION OF TEMPORARY SEDIMENT BASIN #1 TO SEDIMENT TRAP #2. SEDIMENT BASIN #I'S RISER & BARREL SHALL REMAIN SUMCIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTPON OF A 17- CRAIGSOLLE LOAM-0 TO 27. SLOPES. SOIL IS WELL DRAINED NTH A VERY LOW ABOUT 0-8" DETERIORA77ON OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE F-UNC77ONAL DURING PHASE N MEN SEDIMENT 7RAP #2 IS OPERA77ONAL AND L07S 47-50 ARE BEING CONSTRUCTED. THE TEMPORARY IMPOUNDA40VT RUNOFF CLASSIFICARON. SURFACE LAYER /S TYPICALLY LOAM AND 80" REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSInCIN REACHED HALF WAY TO 7HE CONVERSION FROM SEDIMENT BASIN #1 TO SEDIMENT TRAP #2 WILL INCLUDE REGRADING THE BASIN TO 774E GRADING / J. 18 OU77-CLT PROIEC770N. 25B-DYKE THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN SILT LOAM-2 TO, 7% SLOPES. SOIL IS WELL DRAINED WTH A MEDIUM RUNOFF TOP OF THE BARRIER. EXCAVA77ON LIA41TS OF 7HE PERMANENT FACILITY. 7HIS GRADING / EXCAVA77ON KlLL CREATE SEDIMENT 7RAP #2, HOWEVER THE STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-8" 7HICK. d ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS CON7RACTOR SHALL DELAY INSTALLING THE PERMANENT FACILITY's MATERIALS UN77L APPROVAL HAS BEEN GIVEN BY THE ESC PLACED AT THE OUTLETS OF PIPES OR PAVED cHANNEL SEC77ONS. TO PREVENT THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80" MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED. INSPECTOR (e.g. THE 810FILTER MIX, PEA GRAVEL, #57 STONE, UNDERDRAINS, CLEANOUTS, FILTER FABRIC CLOTH, etc.). FINAL SCOUR AT STORMWATER OUTLETS, To PR07ECT THE OUTLET STRUCTURE, AND TO 35D-HAYESt4LLE LOAM-15 TO 25Z. SLOPES. SOIL IS WELL DRAINED M*TH A HIGH RUNOFF IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR 7HE PROJECT WILL BE THE RLD BMING DETAILS ARE TO BE COORDINATED BETWEEN 77-IE CONTRACTOR & 7HE INSPECTOR FOR THE CONVERSION OF SEDIMENT MINIMIZE 7HE P07ENIIAL FOR DOWNSTREAM EROSION By REDUCING THE VELOCITY AND TO THE OUTLETS OF ALL CLASSIFICATtON. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-7" THICK. THE OR CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS TIME IS DIGS. BROOK WOOD KITH BASIN *91 TO SEDIMENT TRAP #2, AND FOR 7HE CONVERSION OF SEDIMENT TRAP #2 TO THE PERMANENT SPIN FACILITY THE ENERGY OF CONCENTTA7ED STORMWA7ER FLOWS. APPLICABLE DEP TH TO THE WA TER TA BL E IS GENERA L L Y MORE THA N 80 DIGS MA Y BE REA CHED A T (434,) 9 78- 4435. IN ADDI 77ON IrHE 0 KIVER MA Y BE TEMPORARY SEDIMENT BASIN AND 7RAP SHALL NOT BE CONVERTED WTHOUT PRIOR APPROVAL FROM THE INSPECTOR. PIPES AND ENGINEERED CHANNEL SEC77ONS CONTACTED. UPON COMPLE77ON OF THE PROJECT, THE OWNIER MLL BE RESPONSIBLE 12. ONCE PHASE Y OF CON5`7RUC770N 15 COMPLE7Z THE S17E IS STABILIZED AND 7HE INSPECTOR ffAS GIVEN APPROVAL, THE REFERENCE WEB SOIL SURt�Ey ONLINE DATABASE, FOUND AT FOR SITE MAINTENANCE. CONTRACTOR CAN REA40VE THE EROSION & SEDIMENT CONTTOL MEASURES, INCLUSIVE OF SEDIMENT TRAPS J1 & #2. 7HE 31 19 82&a, GROUND COVER OF LARG& LOOSE; ANGULAR http://�ebsoilsurvey.r?rcs.usda.govlappIWebSoilSurvey.aspx CONVERSION OF SEDIMENT TRAP 12 TO A PERMANENT SWU FACILITY SHALL ALSO OCCUR AT THIS 77YE. NO ITEM SHAU BE A PERMANENT, EROSIom-REstsIANT STONE w7H F7L7ER FABRIC OR GRANULAR UNDERLINING, To PROTECT THE SOIL FROM REMOVED, THROUGHOUT ALL PHASES OF C0NS77?UC77ON. UNLESS THE UPS7REAM AREAS ARE STABILIZED AND THE INSPECTOR mr, noncar rfwtrz nr coNCEN7RA7ED RUNOFF, SLOW 714E VELOCITY OF GIVES PRIOR PERMISSION. CONCEN7RA7ED RUNOFF W41LE ENHANCING THE POTEN77AL FOR INFILIRA770N. AND TO STABILIZE SLOPES W7H SEEPAGE PROBLEMS, ANDIOR NON-CONESIVE SOILS USE GENERAL,SLOPE (3:1 OR LESS) PER 'C 14HEREVER SOIL AND WATER INTEREACE AND 7HE SOIL CONDITIONS, WA7E7R TURBULENCE TOTAM AND VELOCITY, EXPECTED WGETA77VE COVER, ETC., ARE SUCH THAT THE SOIL MAY KENTUCKY M FESCUE 128 LBS. ERODE UNDER THE DESIGN FLOW CON0177ONS, RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. 3.25 UZZLITY STF"M CROSSING: A S7RA 7EGY FOR CROSSING SMALL WA 7ERWA YS WIEN JN-S`7REAM U77LITY 150 LBS ffMNAL NURSE CRO CoNS7RUC77oN IS INVOLVED. 70 HELP PROTECT SEDIMENT FROM ENTERING THE s7REAM FROM CoNS7RUC770N WITHIN APPROACH AREAS. TO MINIMIZE THE AMOUNT OF FEBRUARY 16 THROUGH APRIL ANNUAL RYE DISTURBANCE WTHIN THE S77?EAM ITSELF. GENERALLY APPLICABLE TO FLOWING MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET S7REAMS W7H DRAINAGE AREAS LESS THAN ONE SQUARE MILE. AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE J.31 ZEMEORARY SEEDINfL THE ESTABLISHMENT OF A 7EMPORARY VEGETA77VE COVER ON DIS7URBED AREAS BY NOTES: SEEDING NTH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION 1. LIME AND IFERTILIZER NEEDS SHALL BE DETERMINED BY SOIL AND SEDIMENTA71ON BY STABILIZING DIS7URBED AREAS THAT WILL NOT BE BROUGHT 70 TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. FINAL GRADE FOR A PERIOD OF MORE THAN JO DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNS7REAM OR OFF -SITE AREAS, AND TO PROVIDE 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION pRO7EC77CN To BARE SOILS EXPOSED DURING CON57RUC770N UN77L PERMANENT OF SEED APPLICATION, IN ACCORDANCE W1 VESCH STD 3,35. VEGETA7701V OR 07HER EROSION CONMOL MEASURES CAN BE ESTABLISHED. PERMANENT SEEDING SCHEDULE a12 PERMANENE,�jMBILIZARD& WE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DIS7URBED AREAS BY NO SCALE PLAN77NG SEED. To REDUCE EROSION AND DECREASE simmair YIELD FROM (STD. & SPEC. 3.32 OF VIRGINIA EROSION & DISTURBED AREAS, To PERMANENTLY STABILIZE D157URBED AREAS IN A MANNER THA T IS ECONOMICAL, ADAPTABLE To SITE COND177ONS, AND ALLOWS SELECn0N OF 774E SEDIMENT CONTROL HANDBOOK, 3RD ED.) MOST APPROPRIATE PLANT MATERIALS, TO IMPROVE AILDLIFEHABITAT TOENHANCE A,-771A7lCC All AREAS WILL 10. lilt: f,(AVfKA(-lUK ZWIALL MAIIVIMIV ALL CKVZOVIV (,LW/fTUL Mt:AZ�Uffr­> AZ) IN jr7r- vjjTg.Tjjv11j arTu'N�.av /11w CONTROL HANDBOOK, REA40WNG ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMIN157RATOR IN ACCORDANCE WTV THE VIRGINIA EROSION AND SEDIMENT CON7ROL HANDBOOK. 14. ALL TEMPORARY EROSION AND SEDIMENT CON7R0L MEASURES SHALL BE REA40WD W77-IIN 30 DAYS AFTER FINAL SITE STABILIZA77ON OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AU7HORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL71NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENT! Y STA61LIZED TO PREVENT FURTHER EROSION AND SEDIMENTATON. /% UP LIU Z-1 DE TA IL fulUGATE10" METAL r" "r s 7,11 _` COLLUR ANI I E'EP *IW&L <*UW WITH CORRIJOAT01S VMCAL CIMLAR TO SE OF SME CAGE AS 7HIE MPF WITH WHICH ff IS tAW SLorum H(Xo FOR 127 WIN. 3/r DwAm Dom 4- I T emm!) $w-LD 80tH &W.S NAIUKAL LfLAU/r. urviv GUMI-1-r-liviv Ur '\- SLOMD HOM CORRUOAIM WffAL RECEIVE A PERMANENT VEGETA77VE COVER. SouTce: Va. DSWC �'Iee -CAMNUOUS WaD AT ar C-0. (Z;7rTI0W A-R SHEEF WMDED 1,18 TREE PJ?ESERVAn0N AND PROM070M. PR07EC7701V OF DESIRABLE TREES FROM MECHANICAL OR OTHER INtIURY DURING LAND DISTURBING AND CoNS77?UC770N AC77WTY TO ENSURE YHE SURVFVAL OF DESIRABLE TTEES AHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CON7ROL, WA 7ERSHED PRO7ECn0N, LANDSCAPE BEAU77FICA 77ON, DUST AND POLLU77ON CONTROL, NOISE REDUCnON, SHADE AND OTHER ENWRONMENrAL BENEFITS WILE THE LAND IS BEING CONVERTED FROM FOREST To URBAN- TYPE USES APPLIES IN 7REE-INHAB17ED AREAS SUBJECT To LAND DISTURBING ACnW77ES. ,139 DUST CONn?QL� REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISIURBING, DEMOL1770N AND CONSTTUCTION AC77WnES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES MICH MA Y PRESENT HEALTH HAZARDS, 7RAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT UFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONS7RUC770H. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WTH THE VESCH. ZIM ?A= ��cm a. CompAcm SOIL a lmmmmwmm ter 10. ffilcuZiluN UIUITI'Auij Ivul-LJ3 ES-1. UNLESS 07HERNSE1NDICATED, ALL VEGETARVE AND S7RUC7URAL EROSION AND SEDIMENT CON7ROL PRAC77CES WILL BE C0NS`7RUC7ED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICARONS OF 7HE VIRGINIA EROSION AND SEMMT CONTRa HA&DBOOK AND VIRGINIA REGULA77ONS VR 625-02-00 EROSION AND SEDIMENT CCN7ROL REGULA770NS. ES-2. THE PLAN APPROWMG AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR 70 THE PRE-CONSTRUC770N CONFERENCE, ONE WEEK PRIOR TO THE COUMFJVCEUFJVT OF LAND DISTURBING ACIIWTY, AND ONE WEEK PRIOR TO 774F FINAL INSPEC77ON ES-3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 7HE` FIRST STEP IN CLEARING ES-4.A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON 7HE S17E AT ALL 77MES. ES-5.PRIOR To COMMENCING LAND D1S77JR81AfG AC771477ES IN AREAS OTHER 7HAN INDICA TED ON THESE PLANS (INCLUDING BUT NOT UM17ED To, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CON7ROL PLAN TO 774E OWNER FOR REVIEW AND APPROVAL BY 7HE PLAN APPROVING AUTHORITY ES-6. THE CON7RACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADD177ONAL ER0901V CON7ROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AU7HORJTY ES-7-ALL DIS77JRBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON 7ROL MEASURES AT ALL 77MES DURING LAND DIS7URBING AC77W77ES AND DURING S17E DEVELOPMENT UN77L FINAL STABILIZA77ON IS ACHIEVED. ES_&DURjNG DEwATERINO opERA77ONS, WATER WU BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. m- 7wr CnNTA C-TOR SAM' I INSPE TALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL Somrcc: Va- DSWC UPER SILT FENCJ TEWORARY 18" DPMSION BEM EVENT ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN 7HE US F W TH WB UD EFFEC77VENESS OF THE EROSION C0N7ROL DEWCES SHALL BE MADE jt�-BACK IMMEDIA 7EL Y NO SCALE STONE CONSTRUCTION ACCESS 5KINE ONSTRUCTION ACCESS �-31 SM-2A AS'PHALT TOP CQUIRSE MIN- �IA Afj',�R.EGATE: BASE 70' LUN. PAVE0 EXI TMG 2X 1V MIN.* Pma VE DRAINX�E +NIUST EXTENO FULL WIDTH TO 5EDIVE�NT OF tN_qRESS Am) tCREvs Lo T 1 *0 ny p RAPP OJPFRATIO�q I AM "#' I A iiiiiihniun watef tap of I iuch umt be instafled with a u"mun I hich ballcock shlftff volvt ;supp4bg a wash how*th a4am a of 1_5 kwW -for adv(p*to et, ;OustAlit pressure; wao watq �wiijs( be camed aw, ffy fiimix the axtimice tOt 311 mWailm- sivinu 4*afio, ditches oi- PAVED WASH RACK 7 77 2 ACRES OR LESS OF DRAINAGE ARRA: VDOT # a COARSE AGGREGATE FLOW 2-10 ACRF� OF DRAINAGE AREA: YD1?T # I COARSE AGGREGATE Sourcc, Va. DSWC CLA22 I RIPRAP 6 SCOTT R. COUINSZ i--q No, 35791 4L-. d W771 6 Z ry ui ui z uj w z 0 0 0 .2 F1 w f 0 0 w 06 W OR I V2 mm wa F- z0 F'-'qrAi limm 0 z 01 4� 0 F_ E z w0 qi� z Ly- LLJ LLJ 0 Lij Ld ul z 06 u z 41 0 0 U) > (x w me fn r JOB NO. 112066 SCALE NONE SHEET NO. 3 W I, CONTRAiCTCAR SHALLINil —77777— TURSANICE 4 7h A CON: CONTIRAV IN FJA CE - lfS OF D' ow PFS'WfTH k' 5 T W PROPOS D doNT CE. PROPERTY LINE W DAVERSION A' S RACTOF�� CONTRACTOR SHALL LATER f CONSTRUCTION ENTRANCE," PARKING & STAGING AREA -PAVED CONSTRUCTION EN v I V A 77 01 vfi am am Al "I 14"lle MM -'M -17,77, 0 mm ­-T ,,, �,,F 1­77' pwru, r- - -r If "I i7K,144,111P w R w w Iff A I CONTRACTOk LOCATION OF SHALL MARK EXISTING PORTA-POTTIES 7` RSWA W/L PRibR TO CONSTRUCTING ST TRACTOR SHALL UTILIZE EXIT #1 &THE CONSTRUCTION ENTRANCE. NO D FOR CONSTRUCTION ACCESS. DISTURBANPES TO THE EXISTING W/L : SHALL OCpR & EXCAVATION OF THE CONSTRUCTION TRAFFIC $HALL NOT RF TRAP SHALL REMAIN OUTSIDE THE LIMITS 1,,��OSS THE PROPOSED/DIVERSION SED/DIVERSION LOCATION OF THE WATERLINE, AS SHOWN. I OF 15cy DUMPSTER kOPOSED colk, ST1 WASHOUT AREA ­*77 Tul SOIL TYPE 7B ... L l . 1$ST 7#1ca a . LOC�7ON OFa y FUI�LING AREA __x_- - f , ­1 / , x x )(�t z PROPOSED "WARNING QUICK SAND, EEP�_ i {I 11W Lu >_ LIMITS OF PHAS INSTALL! I S ETY FENCE, u E SIGN APPROXIMATE DISTURBANCES 4 U) UJ u (TYP-) LOCATION OF SOIL So I/ BOUNDARY (TYP.) Lu ce LLJ Lu 0 JN I JE > Al`,t' LL U) 9 V, W/ WIRE U 25B BACKING E FU ANK SHALL BE COMPLETELY . . .... .. suk �EEI2 DE EARTHEN W HAHE POLYETHYLENE LINING, -744 'K I M' �,,._ •-•..... _ % `1 � )s � �.,� ��z��3�, ".,. '"� I ��� _ _..11 r' '(f{ J � rl `~' `... 1 ,r a'-- ,t � � d � ����,��Y� • 11.70 ac. r0i SB #1 OR E PLACED IN AN I ERVIOUS OPEN -TOP rf DUMP TER WITH A SIDE OOR. THE PROPOSED BERM RDUMPSTER HALL CONTAIN FUEL IN PROPOSED IF- VERSION. THE NT OF A CONTRACTOR SHALL CONTRACTOR SH LLENSURE POSITIVE SLOPE I MAINTAIZI) ENSUR E CAPACITY IS 10% LARGER BERM SHALL BE S BILIZED AIS THAN THE MAXIMUM VOLUME OF STORED FUEL. A FIRST STEP IN ISTURBANCE. r 4** Ps PROPOSED SLOPES STEEPERA�E T N HArt 6, 3:1 SHALL HAVE OW (NASMULCH 0 GRASS) G COVER SUCH 40P ER PLANTINGS. J LA L '728 EXISTING CONTRACTOR SHALL C 0 RDIN VEGETATION(TYP.) ION OF THE POWE LINES WITH THE DEVELOPER, POWER ANY TREE & j RELOCAl --IMPACTED 1 PROTECTION CUSTOMERS, P 4 , x/vaa IMITS OF RB NCE PROPERTY LINES COINCI . .. ........ Z, -J,10 0 DISTURBANCE/, TY 2". TA L AREA-= 13 15ja 'THIS AREA M WATER WAS USE r ON4A&WJE`LL. SoILTYPE ALITY U Qd 501L TYPE 7B PROPOSEE) STOC ILE 1*4URROIUN FENCE BY 35D ?194 SIL'T 4v W 7 ®0 PROPOSED 18" DIVERSION. o CONTRACTOR SHALL ENSURE a o(c, o % POSITIVE SLOPE IS MAINTAINED. 9BERM SHALL BE STABILIZED AS 00 A FIRST STEP IN DISTURBANCE. --0 Awl WIRE Ps 0 BACKING BE 0 EXISTIN NICE TO 2 FOR PROPOSED 11.8' DIVERSION. REMOVED. SHEET d )R 0 CONTRACTOR SHALL ENSURE ADDICIO L ITEMS PROPOSED POSITIVE SLOPE IS MAINTAINED. TO DEMOLISHED. (D 0 BERM SHALL BE STABILIZED AS A A FIRST STEP ]IN DISTURBANCE. SOIL TYPE a 17 PROPOSED T WID DOT CL' Al, EC-1 STONE UTLET i Q PROTECTION TO I END TO/' BASIN FLOOR. CO RACTOR 0 0 SHALL MONITO REPAIR THE RIPRAP AS EDED 0 100, WPO AFrER EACH-RMN L EVENT. q BUFFER, TYP. oco(o F OD STREAM, TYP. 0\ LIMITS 0 Cyo 000(o PR E) SA FENCE, 000 Q CKS KEEP OU SAF IN ' GNS "W ING o 0 100 YEAR a *00 0 0 (o FLOODPLAIN 000(o PROPOSED BAFFLES LIMITS, TYP. x 0,0 ,a ­­ ­-, - - a I B TP TREE 0 W/ WIRE PROTECTION BACKING GRAV�HIC SCALE alo 000 40 'ID 20 40 MATCHLINE, ...... . ...... f SEE SHEET 6 IN FEET 40 ft iE THE,E)USTING. Y,4 FNTR.ANc Al2'i70'MlNlMLJM' WITH WASHRACK. TH SCOTT R. COTlJNS�?-. ;--q No. 35791 4t, ITH SCOTT COLLINSZ No. 35791 LOCATION OF -t'OXAL E -71, -.1 PORTA-PoTriEs V mom _7 F /T9Ld Cn NC �lf POSED CO If f IP ST1 WASHOUT AREA ..2 R, rt%i R� C. tEA 0 41 C U�LING REA Z 41 Lu 1-1;:� u CL LIMITS OF PHASE PROPOSED ETY FENCE, U) ZDISTURBANCES A INSTALL SI WARNING Q) I,, q I z w 0 �! QUICK SAND, D, 0 0 ui ui uj U 2-, U) ?- ul w 0 0 Z 0 0 AdmL Cn ce. 0 cor- LL- -,ly Rn rn U ui INLET 0 w ui w U) L) PROTECTI N 0 A z z z ST #1 BACKING CLUBHOUSE, 00 0.35 ac. 0. .0 PARKING LOT, TOTS & WA LU 0 0 41 ACTIVE RECREATION FIELD ui w ui z (n V) w I v BE PART OF PHA8E I. *4 > > w w 0 Ile 0 j. E Ft I ANK SHALL BE COM PLETELY _744- SU MI EEP, TWIDE EARTHEN POL --- --- H A HEAVYYETHYLENE LINING, LACED I LVIOUS OPEN -TOP TER WITH A SIDE OOR. THE PROPOSED BERM �R DUMPSTER HALL CONTAIN FUEL IN PROPOSED 16" VERSION. THE NT OF A CONTRACTOR SHALL CONTRACTOR SH LL ENSURE ENSUR CAPACITY IS 10% LARGER lal� POSITIVE SLOPE I MAINTAINED rHAN THE MAXIMUM VOLUME OF STORED FUEL. BERM SHALL BE BILIZED AS A FIRST STEP IN ISTURBANCE. 0 ........ . . .... ..... 00 Z PROPOSED SLOPES STEEPERT A -0 3:1 SHALL HAVE LC T ACE )w (NOT GP COVER SUCH LASS) GRO AS MULCH 0 N EP. PLANTINGS. EXISTING 728 VEGETATION> (TYP.) 0 TREE Ci �?, CONTRACTOR SHALL TIE THE REAR PROTECTIONALLEY ROOF DRAINS FOR LOTS 1-13 z 33-46 TO THE YARD DRAINS IN m • THE REAR OF THE LOTS CL F- ------ - IMITS C )F R NCE COINCI PROPERTY LINES 0 Q) vi CL /--C Z Lj U) IMITS OF DISTUR15ANCE, TYPI ICAL" r 3.15,0C. 41S AREA TOTAL MEA�zl WAS FOR V'RRMI WATER USED QUALITY CALCULATION4,ASWEL. �W z PROPOSED STOCKPILE LLJ C0 *4URROlUNutv my FENCE uj Lu a) 0 -A Z CL 1dF 0 0 �3 CA LLj E PHASE III EROSION & SEDIMENT CONTROL PLAN uj m SCA#E DETAIL FOR LOTS 47-50's CONSTRUCTION) _QaD PROPOSED 18" DIVERSION. L1"=40' 4A 1110 60 ac c Z, FFINEb �D # DRAI CONTRACTOR SHALL ENSURE it & Q� (D 9 o( 1 P MANEN•TH Is U OR POSITIVE SLOPE IS MAINTAINED. ION TO SU of r7 u BERM SHALL BIE STABILIZED AsBE US ST SE SEDIMEN -1/ --4 Ld A FIRST STEP AN DISTURBANCE. w ON L�ULAiqONS. p--q W/ WIRE BACKING I IS STAB S47-50 11,01 < U) coca "RI z w z PROPOSED 1:81 DIVERSION. Tic 4t 0 1-50 SHALL BE THE LAST LOTS CONSTRUCTED IN PHASE I. ONCE IS, 66 -j 0 CONTRACTOR. SHALL ENSURE v• Bi RAV�L RAINS -j a BULK OF PHASE I IS STABILI;ZED, THE CONTRACTOR SHALL REGRA r- 0 POSITIVE SLOPIE IS MAINTAINEI FIVE FABRI etc.) SEDIMENT BASIN #ITO THE PROPOSED CONTOURS SHOWN FO TH c BERM SHALL BIE STABILIZED AS FIRST STEP I:N DISTURBANCE, ENT SWM FACILITY. THE CONTRACTOR SHALL DELAY THE ui CONVERSION OF THE FACILITY TO A PERMANENT BASIN THOU0 iS ITS EXCAVATION CAN BE USED AS A TEMPORARY SEDIMEN TRAP w 0 FOR LOTS 47-50's COWSTRUCTION, SUCH A DESIGN CEPT ujct 0 ENSURE ESC MEASURES ARE IN PLACE AT ALL TIMES AN SHOWN 0- aND y 1. SHEET AS THE PHASE 11:1 EROSION & SEDIMENT CON L PLAN. 0BA IN CON E CONTRACTOR SHALL COORDINATE THE TIMING is CONVERSION WITH THE INSPECTOR. TEMPORARY SEDIMEN IN #1 TEMPORARY SEDIMENT TRAP #2 SHALL NOT BE UK 100, BUFFER,TYP. RTED WITHOUT PRIOR APPROVALS FROM TH IE R. PROPOSED WIDE C) 0 STORE WEIR C- C3 (goo LEVATION=69 41 j/ e, ` r \ STREAM, TYP. Q) LIMITS 0 o� a (a) a P-9ED FENCtl E a a 9p0000 000 100 YEAR js 0 a FLOODPLAIN 0 t7u LIMITS, TYP, 0 0 a c 8 ui N TREE U) PROPOSED ANCHORED uo I/ -, -, CHAIN LINK FENCE PROTECTION JOB NO. P POSED 10' --ccBACKING WIDE TOP OF DAM 0 WITH SIGNS READING 112066 .1 GRAI�HIC SCALE ELEV.=696.00'. 'WARNING QUICK -0 SAND, KEEP OUT" SCALE Nk-rOXA 20 40 Is" cc a 1 0 RAISE THE RISER RIM ELEVATION 1 =40' CONTRACTOR SHALL WAIT TO AND THE SPILLWAY CREST ELEV. TO 695.5' UNTIL THE TRAP IS y MATCHLINE, SHEET No. READY TO BE CONVERTED TO A PERMANENT FACILITY. RISER TO J\ a SEE SHEET 6 PROVIDE AN ADDITIONAL ESC OUTLET DURING THE ESC PHASE. Q) lip 5 1 itch 40 It N M11,00000 wEEP HOLE (AS REWD a i r-$TEPS (AS REQ-D. YrEE? It STEP5 ',IS REQP ; i j�: jx W5,5 x W&5 WELDED WIRE FABRIC OR EOUVALENT AREA MONOLITHIC FOOTING all+ 2X DOGHOUSE WITH FOOTING NOTES: I. 5EE CENEPAL NOTES FOR ADDITIQUAL IWORMIATION ON WEEP HOLE'S.STEP REQUIREMENTS. 'H" 4114. FT. FOR I.4ANH4LFS1 DIMENSIONS, FTC, 1 ALL 13ASE UNIT% ARE TO HE IN ACC4MANCE WITH THE REOUIREMENTS OF AASHTO Mtn CONCRETE SHALL BE 4000 1751. 4, WHERE OPENINGS ARE REQUIRED FOR PIPE, THEY SHALL BE FORMED, DRILLED. OR NEATLY CUT A' . APPROVM CRY THE rNVINErR, THE MITRACTOR SHALL FURNISH THE F�Al_ WITH THE ANGLES BETWEEN C047ER LINES, THE INVERTELEVXTI04S. MID THE SIZE OF ALL PIPES TO ENTER THE WANHOLE. HOLES ARE TO 13E A MN[IWM OF 4` TO A MAXII&IM OF 81' LARGER THAN, THE OUTSDE OIAMETEk OF THE PRUPOSED PIPE, 5. QIMENSIO14S SHOWN ARE MINIMUM. ACTUAL DIMENSIONS MAY VARY WITH MANUFACTURER 6. 'g, IS NOMINAL DIAMFTFR, 7, IN THE EVENT THE INVERT OF THE Q_UTFkL PIPE 15, HIGHER THAN THE BOTTOM OF THE STRUCTURE, THE INVERT OF THE 57RUrTURE SHALL BE SHAPED W17H CEMENT iUiJRTAR 'TO PREVENT STANDINC; HALE tA5 FEWDL) g ALTERNATE JOINT DETAIL DIMENSIONS 1) 1 MINIMMUM y MINIMUM SLADC0XED. UAX,.PIPL SIZE ASSOLOTE MAXIM�AA "jr 48" 601, ry, 36, 42" 72.. 61, 61, 48" 04­ 84" 7" all 6W" 6Fp 8" 66" 7 " all, 00„ 991, =262 -Iove 961, 144" 121. U)A- OR PONDING Of WATER IN THE STRVCTLXRE. 8. TONGUE X40 GROOVE JOINT ARE TO BE OF FABRICATOR'S DESIGN MEETING VDOT APPROVAL. jOINTS ARE TO BE SEA-ED WITH MCIRTAK O-RING GASKETS, OR RUTYL RUNER. DEPTH `H OF 15" DIAMETER 6A,5E VNIJ RESTRICTED yr . SV­­ D'. TANA RODAND 8R9joGuE STANDARDS SHEET I OF I F REVISION DATE Sediment Basin Design #1 drainage area (acres) 15.05 basin volumes, (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) 682.00 999.0 0 684.00 1744.0 100 686,00 2668.0 263 688,00 3754.0 499 6W00 4997-0 822 692.00 6352.0 1242 694.00 7811.0 1765 696,00 9376,0 2401 wet storage'. wet storage required (cy) (67*DA) 1008 dewatering orifice elevation (ft) 689.59 wet storage provided at this elevation (cy) 1008 available, volume before cleanout (cy) (34*DA) 512 clearIoUt elevation (ft) 686.81 distance from cleanout to orifice (ft) (> V) 2.8 dry storage: dry storage required (cy) (67*DA) 1008 principle spillway crest (ft) 693-38 dry storage provided at this elevation (cy) 1008 diameter of dewatering orifice (in) 8-0 diameter of fle)dble tubing (in) (orifice+2") Mo runoff: C (use Q.45 for bare earth) 0.45 tc (min) 12 1 2yr 3.8 Q 2yr 25.7 1 25yr 5.6 Q 25yr 41.7 principle spillway: available head (ft) 1.10 diameter riser (in) 48 spillway capacity, Qp (Cfs) 41.7 diameter trash rack (in) 72 barrel length (ft) 3M head on barrel through embankment (ft) 3.2 diameter of barrel (in) 1E Sediment Trap design #1 drainage area (acres) (<3) 1.55 trap volumes: elevation (ft) area (sf) volume(cf) volume(cy) 720 1450 0 0.0 722 2401 3,811 141.2 724 3511 9,688 358.8 wet storage: wet storage required (cy) (67*DA) 103.9 bottom of stone weir (ft) 721.5 wet storage provided at this elevation (cy) 103.9 slope of wet storage sides 2:1 dry storage: dry storage required (cy) (67*DA) 103-9 crest of stone weir 723.0 dry storage provided at this elevation (cy) 146.1 slope of. dry storage sides 2:1 Sedi nent Trap design #2 drainage area (acres) (<3) 1.66 trap volumes: elevation (ft) area (sf) volume(cf) volume(cy) 690.6 1531 0 0.0 692 1531 2,297 85.1 694 1531 5,358 198.5 695 1531 6,889 255.2 696 2077 8,687 321 ,7 wet storage: wet storage required (cy) (67*DA) 111.2 bottom of stone weir (ft) 692.5 wet storage provided at this elevation (cy) 111.2 slope of wet storage sides Vertical. dry storage: dry storage required (cy) (67*DA) 111.2 crest of stone weir 696,0 dry storage provided at this elevation (cy) 143.9 slope of dry storage sides Varies TO 4--D" MAXUUM. ONE THROUGH PIPE ON-Y, (ONE PIPE ENTERING fiNO ONE PIPE EXITIt,43 STRUCTURE) TG _N4pSCNF_6 DRAWING I'$ QU FILE 114 THE CENTRAL OFFICE, FAD PRECAST BASE UNITS [M VIRGINIA DEPARTMENT OF TRANSPORTATION MIN. I'Wt SPILLWAY CREST OF EMERGENCY 2'W,THQVT , SPILLWAY I - ------------ RISER CREST RING. ....8 .. ME design high water 694.48 top of dam (ft) 696.00 top width of dam (ft) 10.0 bottom of basin (ft) 682.0 approx bottom dimensions: 37')66' upstream face slope: 2.1 downstream face slope: 3:1 baffles: YES length of flow, L (ft) 37 effective width, We (ft) 193 L / We (baffles required if < 2) 0.2 collars: YES depth of water at spillway crest (ft) 11.38 slope of upstream face (ZA) 2 slope of barrel (Sb) 1.34% length of barrel in saturated zone (Ls) 72 number of permanent collars required 2 dimension of permanent collars 5.6'x5.6' emergency spillway: YES required capacity (Q25-Qp) (cfs) 0.0 bottom width (ft) 60 slope of e)dst channel (ft/ft) 33% minimun length of east channel (ft) 6 crest of spillway (ft) 695 I'l VARAAE I r_rll_� CREST OF STO"t WEIR L EW, DRY STORAGE r VMME WEr STORAGE m4x CLOTH �F>ITER *SU PLATE 313-1 COAM *GKOATE CLASS I RFRAP weir length (ft) (6xDA) 9.3 bottom of trap elevation (ft) 720 bottom trap dimensions: 82'x21' top of dam elevation (ft) 724 top width of dam (ft) 2' top trap dimensions 11 2'x3T 0MINAL CREST OF STORE WEIR I&RIABLE• 4ROU10 ET,; DRYSTORAGE VARIABLE WET STORAGE -SEE PLATE a 13-1 1;OAM A%KGATE CLASS I RIPRAP weir length (ft) (6)dDA) 10.0 bottom of trap elevation (ft) 690-5 bottom trap dimensions: 56)0-8' top of dam elevation (ft) 696 top Width of dam (ft) 10, top trap dimensions 95IX39, T IIAPORARY EIVII SEDIMENT BASIN #1 DETAIL SCALE 1"=20' PROPOSED DIVERSION DIRECTING RUNOFF TO SEDIMENT BASIN #1 10'WIDE TOP OF DAM ELEV.=696.00', TYP. PROPOSED PERMANENT DRAINAGE MANHOLE, STR. 113, TO BE UTILIZED FOR THE ESC OUTFALL. (VDOT STD. MH-1, TOP=694.50, INV IN=688.50, INV. INS 690.08, INV OUT=687.00) PROPOSED ESC 018" HDPE BARREL (38.90 LF g 1..34%, INV. IN=69o. 01i JT= 69o.o8). ESC BARREL SHALLSE USED AS THE SWIVI FACILITY's PERMANENT ITFALL AFTER THE BASIN's CON ERSI N./ ✓ LIMITS OF EAM BANK S, TYP. _7� .... ..... ESC MEASURES DETAILS FOR SANITARY SEWER CONNECTION SCALE 1"=40' H STREAM FLOW DIVERSION EMBANKMENT MATCHLINE, SEE TO BE EXISTING UNDISTURBED EARTH, OR NON -ERODIBLE, WATERTIGHT SCOTT . COLLINS�e w/ WIRE SHEETS 4 & 5 MATERIAL BACKING e�l SF L) No. 35791 1� acoca PROPOSED FLOW/ (D a ry BARRIER (SANDBAGS, r a EX. GROUND ZONAL Lli PLYWOOD, JER U BARRIERS, 7REY DIVERTED STREAM Oar CHANNEL WITH TYPE EQUIVALENT) (LOOKING SOUTH) B LINING (SEE DETAIL SEWER( N.T.S. 3.25-2 THIS SHEET) PROPOSED DIVERSION DIR G _j __1 _j RUNOFF TO SEDIMENT I #1 LIMITS OF 0 STREAM DIVERSION DURING CULVERT INSTALLATION DETAILS 0 STREAM, 0 SANITARY SEWER INSTALLATION NOTES: 1. CONTRACTOR SHALL INSTALL AND MAINTAIN A STREAM FLOW DIVERSION PER DIVERSION CHANNEL CROSSING VESCH DETAIL 0 3.25-1 AND 3.25-2 DURING ENTIRE SANITARY SEWER ROPOSED SAFETY FENCE, PROPOSED RIPRAP AT CONSTRUCTION OPERATION. INSTALL SIGNS "WARNING TRANSITIONS (BEGINNING & 2. SILT FENCE SHALL BE INSTALLED ON BOTH SIDES OF THE QUICK SAND, KEEP OUT ,_ENDING) OF UTILITY STREAM PROPOSED STREAM DIVERSION CHANNEL. THE CONTRACTOR SHALL ­,�,,CROSSING DIVERSION INSTALL AND ADJUST SILT FENCE AS NECESSARY TO PREVENT cn z I-- V SOIL FROM ENTERING THE STREAM. RIPRAP SHAH BE PROVIDED ;_7 PROPOSED J, WITHIN THE EXISTING STREAM BED AT THE TRANSITION FROM THE 0 z z ffAft 0 LU LU LU BAFFLES W/ WIRE BACKING EXISTING STREAMBED TO THE PROPOSED DIVERSION CHANNEL, x 2: AND AT THE TRANSITION BACK FROM THE DIVERSION CHANNEL TO 0 x 2: Z V' USIC 0 THE EXISTING STREAMBED. AN APPROVED FLOW BARRIER z 0 U (SANDBAGS, PLYWOOD, JERSEY BARRIER, OR EOUIVAI ENT) WILL BE Alm, < INSTALLED BEHIND THE RIPRAP TRANSITION. 0 � 11 0 3. THE DIVERSION CHANNEL CROSSING MUST BE OPERATIONAL 0 -C PROPOSED ALIGNMENT OF WIDE TOP OF DAM BEFORE WORK IS PERFORMED IN THE STREAM (CONSTRUCTION OF to :4� 0 _�i STREAM DIVERSION V4HILE LU O� CD ;4 LEV.=696.00', TYP, DIVERSION SHALL BE PERFORMED "IN THE DRY"). 1AN 0 =3 :e � CULVERT IS INSTALLED 4. UPON COMPLETION OF THE SANITARY SEWER CONSTRUCTION, AND %F1 U_ In NJ Uj Uj WITH INSPECTOR AND ACSA APPROVAL, THE CONTRACTOR SHALL Z Cd IL 1=4 0 U) in 0 REMOVE THE STREAM DIVERSION AND ALLOW STREAM FLOW TO z z z U) z X RESUME THROUGH THE EXISTING CHANNEL. 1-4 0 > 0 > "q tit LILI Lu PROPOSED VDOT STD. B-1 (048" CONCRETE BASE) SHALL SERVE AS L) > Uj Uj :3 z UJ Uj fn (n THE ESC RISER. THE B-1 / RISER & ITS BARREL SHALL BE FIRMLY 0 fx (n �4 - PROPOSED 20' LONG STRIPS *-I > EMBEDDED 6" INTO AN 8'Lx8'Wx18"D REINFORCED CONCRETE PS OF SILT L) z > Uj 0 FOUNDATION. THE RISER $HALL HAVE A TOP RIM ELEVATION OF FENCE EVERY 50, CENTERED ON THE Lu C2 *� 693.38'. RISER TO INCLUDE A PERMANENT TRASHRACK & A TEMPORARY SANITARY SEWER, WHEN LOCATED 0 08" DEWATERING ORIFICE (INVERT ELEVATION OF 689.59') DURING WITHIN THE FLOODPLAIN, AS SHOWN. ALL ESC PHASES, INCLUSIVE OF THE REDUCED FOOTPRINT FOR THE L CONSTPUCIION OF LOTS 47-50, AS SHOWN ON SHEET 5. ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF TEMPORARY FACILITIES TO A PERMANENT SWM a FACILITY, THE CONTRACTOR SHALL RAISE THE RIM ELEVATION TO a r Mi UTILITY STREAM DIVERSION NOTE: 695,50, AS SHOWN ON THE SWIVI PLANS, THE CONTRACTOR SHALL a 1 i CONTRACTOR SHALL REMOVE PROPOSED REINSTALL THE PERMANENT TRASHRACK (SHOWN ON SHEET 9) & PLUG THE TEMPORARY DEWATERING ORIFICE WATERTIGHT. SEE SHEET 8 FOR 0 FLOW BARRIER & STRkAM DIVERSION ONLY .0 a \0 AFTER THE SEWER INS'rALLATION HAS BEEN f 0 PROPOSED 60' MIN. WIDE ADDITIONAL. PERMANENT SWMFACILITY DETAILS. ALL CONNECTIONS COMPLETED, ACCEPTED I5V­THE ACSA AND P I SHALL BE WATERTIGHT, TYPICAL. OVAL. GRASS LINED SPILLWAY THE ESC INSPECTOR GRANTS AP PR CREST ELEV. 695.00 0 0 PROPOSED SILT 0 CID -a a Lu 'a F- a 0 a E 00 0 0 00 PROPOSED LI 0 0 ff TEMPORARY SEDIMENT TRAP # 1 DETAIL OF DISTUR > 0 'o a 0 0 U L9 00 00fI� PROPOSED PERMANENT STORM SEWER STR. 100 YEAR a 0 0) 1A, TO BE UTILIZED FOR THE ESC 0 FALL > FLOODPLAIN, 9) W/ WIRE 0 (36" HOPE @ o.59% wl AN INV. OUT= TYP. STR. iA SHALL ALSO BE usf.D-AS THE 4P** BACKING �7'11 CY) PERMANENT'SWM FAC4LITY OUTFALL. MOM N 0- CL J, C) Lf PROPOSED VDOT CL. At RIPRAP LINED U3 + CHANNEL. SEE SHEET 8 FOR DETAILS. 04 CN 100'WPO STREAM-, CL BUFFER, TYP. CL LIJ vi Uj(0 J, J------ > -2 11111L, j W W W • V_ COUNTY OF ALBEMARLE Departrwnt of Community Mvelopnwnt !zIll�l1illill 111!piiii� �=n, The following is a list of infonnation required on construction record drawings for sfor m,water facilities (reference Water Protection Ordinance 17-422). It is pre _f�rable Owt the ,coilsirpction record drmving be prepared by someone other than the designer, Please donot provide design drawings as construction reford drawings, A. A signed and. dated professional seal of the preparing engineer or surveyor, R, The nanae and address of the firm and individual preparing the drawin as on the title sheet C, The constructed location of all items associated with each facility, and the inspection records to vtrify proper ditnensions, matcrials and installationA Theilenis includc., but are rat fi"Icd to the following. 1. , Inspection Records and Photographs for pipe Ilrenchesimd beAding, including underdraims, 2. Video Pipe lnspen for any pipes which are not accessible or viewable. 3. Updated Locafion with geo-coordinates of all facilities. 4. 1erified Drainage Area maps for the drainage area treated, and for drainage bo the facilities, 5, Currtnt physical and tolpograph ic survey for all earthen structures, Ponds sbould indiude a. survey of the pond bottom. Surveys should verify pond volumes are per design, Corrections ma; y be requ.tred for alterations from the design, 6. Plants, lovation and fyjx, 7, Plans and profiles for all culverts, Pipes, Risers, lVeirs and Drainage Structurts - Display the installed type of drainage structures, culvert/pipe size, weirs, materials, inlets orr end treatraent(s), inlet and outlet protection, alignment and invert elevations compared to design. 8, Contputations: For significant deviations from design, provide sealed computations veriifying that the as -built condition is cquivalvnt or kner than desigp, 9Ditfb Lines - Display the constructed iccation. of all ditch lines and channels, including t ypical sections and linings. 10- 1, asernents - Show all platted easernents with dead, book mfercutces labeled, Facilities an. d drainage must be within platted easements. Provide copies of recorded documents, 11. ( uarda-ail, fences or other safety provisions ­ Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied end treatments, compawd to design 12, Material layers - biofiftcr ittedia., stone layers., sand laycisi, keyWrays and cores niust be verificd as to material types and depths, indu& inspcetion reports, boring ortest pit reports and mterials ,certifications. Biofilter rncdia must be mi approved state n-Lix. t 3. Access roads - show location of access roads.. surface tmalawn.1, drainage, etc, as applicable, 14. Conipaction reports aw required to verify fill compaction in dams.. 15, Munufu a verb tions forpropriclary 13M. Ps certifying PrQm installation and functioning. MIMMOIFT WATER QUANTITY Existing Driveways 2,100 sf Existings. Buildings & Structures 3,375 sf 5,475 sf Existing Impervious Area Summary (DA B) WATER QUANTITY Existing Driveways 11,975 sf STORMWATER MANAGEMENT NARRATIVE: OVERVIEW. THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART 115 SWM REQUIREMENTS. ADDITIONALLY, THE CHANNEL & FLOOD PROTECTION REQUIREMENTS ARE MET. PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS PERTAINING TO THIS PLAN"") WATER QUALITY AND QUANTITY COMPLIANCE. WATER!RUALITYSUMMARY THE STORMWATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT ARE MET THROUGH TWO BEST MANAGEMENT PRACTICES. A PROPOSED LEVEL 11 BIORETENTION BASIN IS PROPOSED. THE BIORETENTION BASIN IS FED BY SUBAREA E & PROVIDES A PHOSPHOROUS REMOVAL RATE OF 1.42 lbs/yr. THE BEST MANAGEMENT PRACTICE OF PURCHASING NUTRIENT CREDITS IS ALSO IMPLEMENTED. AFTER THE BIORETENTION BASIN's PHOSPHOROUS REMOVAL CREDIT, A REMAINING BALANCE OF 6.97 lbs/yr IS REQUIRED. THIS BALANCE ACCOUNTS FOR 10,650 sf OF FUTURE IMPERVIOUS AREAS THAT WILL LIKELY DRAIN TO THE PROPOSED STORM SEWER LOCATED IN THE PROPOSED ALLEY. IT ALSO ACCOUNTS FOR THE EMERGENCY ACCESS ROAD. AFTER THE MINIMUM PURCHASE OF THE AFOREMENTIONED PHOSPHOROUS REMOVAL RATE, A TOTAL OF 8.39 lbs/yr WILL BE ACHIEVED (1.42+6.97). THE PURCHASE OF THE PHOSPHOROUS REMOVAL RATE CREDIT IS REQUIRED PRIOR TO THE ISSUANCE OF A LAND DISTURBANCE PERMIT. MI ON !01 Mp • kW WNIN mm-i. #A WATER QUANTITY Existing Building & Structures 2,975 sf Proposed Roadway & Parking Lot 74,375 sf Proposed Sidewalk 23,100 sf Proposed Buildings 56,520 sf Proposed Driveways 17,800 sf Future Impervious Areas 10,650 sf Proposed Emergency Access Road 11,575 sf 196,995 sf WATERSHED SUMMARY 1-year Flow, 2-year Flow, 10-year Flow, CN Area, ac, cfs cfs cfs DA A (Pre-Dev.) 60.2 6.72 1.83 3.84 11.85 B (Pre-Dev.) 63.0 3.67 1,39 2.63 7,04 _DA 61.2 10.39 3.22 6.47 18.89 1-year Flow, 2-year Flow, 10-yearFl,ow, CN Area, a c. cfs cfs cfs (Post-Dev.) 74.2 12-68 13.84 20.80 4181 Total Proposed Impervious Area Summary WATER QUALITY- Site Land Cover Existing Building & Structures 2,975 sf Proposed Roadway & Parking Lot 75,500 sf Proposed Sidewalk 23,375 sf Proposed Buildings 56,520 sf Proposed Driveways 17,800 sf Future Impervious Areas 10,650 sf Emergency Access Road 11,575 sf 198,395 sf General Construction notes for Stormwater Management Plans 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser faints are to be watertight within stormwater management facilities, 3. For temporary sediment traps or basins which are to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. 2� SCOTT R.c OLLINSZ No. 35791 %�NNAL rtcl>41/ Nl I m ml!�Illmll = ro-11 WNINO � VA LEVEL II BIORETENTION BASIN'C' DESIGN & REQUIREMENTS: Treatment Volume (Per VRRIVI Calculations) 2,512 cf Minimum Treatment Volume Required 3,140 cf Minimum Forebay Volume Required (15% of Tv) 471 cf Forebay Volume Provided 540 cf * Minimum Surface Area Required (Tv/Storage Depth) 1,457 sf Surface Area Provided 1,531 sf Length of Shortest Flow Path 85 ft Overall Length 101 ft Shortest Flow Path / Overall Length Ratio ( > 0.8) 0.84 * Area based off 3' Mix at 25% porosity, 3" pea gravel at 2% porosity, 12" stone at 40% porosity & 12" of ponding at 100% porosity � •:i1 i j 1t►>1 1 l , •fi Area of Elevation Forebay Cell Volume (ft) Contours (sf) (cf) 690.5 - - 692 - - 693 - - 694 29 0 695 279 133 696 552 540 (SEE SHEET LID—,5'( -%AgTH N.JDE,. R PAI"P- Filter Cell Elevation I Contours Volume 690.5 1,531 0 692 1,531 2,297 Excavation 693 1,531 3,828 Zone 694 1,531 5,358 695 1,531 6,889 Ponding Zone 696 2,077 8,687 B FIL.T'EA OOL MEDIA `_k&eAND, % TOPeOl I & 2 LEAF GOKAPOST, EXISTING GtT- AIDE 1 r_7jLI BEAM AND 9111LLWAY W ITH FC-3 MATTING, REMAjNjN Dj0T'LI EE) LOPEO }TALL � o-WTAB[LI�ED NF�ITN � -z I�dJ�+.TTtt - a) ALL BEFAM FILL I A:TER AL ;3.aALL - I.401 T OF WL, OL, &G, OR !30 00,ILG AwiD FREE �1F V' (3D, R +T-6, ROCI,�, 'OR AT,4y OT-I-'E'R N0NCADNqPACFT15L�-_- SOL.. COMPACTED FILL SHALL �E If I T L f r IN NU-)M UM A f= INCH LIFTS PTO Y IN18fl-Y OF 95% i= Tr 6T�* NDARD PROCTOR MAMNII.7M DRY DENSITY A a i D59d- I1111 110. r T 4"` P.V C_ S REW C.AP ON GR,,r? ICE FIECOi�, M-ENDED MAP :1 a' .OPiA 3" SI-IREI DED HARDWOOD MULCH LAYER DI0RFTE_:MT1.()N IIL_ VEDIA ILJ VEL. z MtNIi?J UNI 36� 3- f'41N r'EA GHAVEL LAYER 1 C-FLAVEL ,'atJMP A+1INIiIVI3, M (LEVEL 2) ,, . arSIMMI (SIDE SLQPE EXCAVATION' NEED NOT BE VERTICALj FJI_3ER FAgRIO ('PLAC*EO ON PEA NAVEL OVER kJNDEsiG: ROJN ONLY, I_ 2' TO PITHE€I &06-) IF NEEDED PEF F0R.A,TE1D Ur\1QERDRA1N PIPE (19 aPfik A ICE MAX) IF NEEDE.b ■ ` , . r r % � r. �' r t r r 1 � � " r r � r � , f r► r �' � r r r I ► TABILiZED INFLOW INFLD'>!VS€��iRF—TRE�A'�TM Ey a'�kICyT-` OJ THICKNESS 13XSED ON DF816N FLOW (REFER TO pRETRFATIMR4T DETAILS AND SPECIFICt5tiT�INBi I I' 6" SCI- D 40 PERFORATED U[FIL ERDRAIN STABILIZED EARTHEN SPILLWAY DROP 11°�LET WITH COMPACTED �901L AF;CJUND STRUCTURE ((SEF SP'E-CIFIC;ATIONS) PEA. GRAVEL FILTER LEVEL SPREADER OR STABILIZED APRON E(N(31NEERED SC1IL MEDIA I it P'-1 11�'"11 I_1 I I=I I TIE LJ NDE.RDHAIN INTO DROP INLET OR DAYLIGHT L�OWINSTREANI PROPOSED V WIDE FOREBAY INTERIM TOP 7 0 OF DAM ELEVATION=396.0W. FOREBA TO INCLUDE A 10' WIDE RIPRAP LI SPILLWAY, CREST ELEV.=395.5' idWIDE MIN. TOP OF DAM ELEV.= WITH W MINIMUM CRASS LIN EMERGENCY SPILLWAY. SPILLWA ELEV. OF 395.5a' ESTABLISHE MAXIMUM 6" PONDING DEPT CONTRACTOR SHALL INSTAL COMPACTED CLAY CORE w/ CUTOFF TRENCH. EMBANKMEN BE IN ACCORDANCE w/ TH DESIGN SHOWN ON THEME PL N 10 r_ •a w PROPOSED ESC 018" HDPE BARM REMAIN (38.90 LF @ 2.34%, INV. IN= INV. OUT= 69o.oft BARREL SHALL 0 THE PROPOSED BIOFILTER's UNDERI ESC RISER & BARREL SHALL BE CLEA1 FREE OF DEBRIS PRIOR TO THE CON1 OF THE ESC TEMPORARY BASIN" PERMANENTSWM FACILITY, r L Y DAM PROPOSE NED PROPOSE FdREBAY C LLT GRAD_ ;. 6 6.00' ED YCREST 695 I 695 H. GRADE A =`y s T TO ANS. 690 690 B&aA PROPO G THE 1flef O E H f�4''' NONPER O A" PVC dAiN. - E , ._ ... _ 10, TED UTFALL CLEAN UTS. SEE! DETAIL ON 117HIS ER. 685 SHEET. 685 LTO PRO SED E �C� RI sER DOT STQ. B-1, O4 °' CONCRETE BASE &ITS i9o.6o, TRA -RACK S IALL REMAIN. THE 0-1 / RISER & ITS BARREL SH LL BE JTFALL FIR LY EMBEDDED 6" 1 TO AN 8'(x8'Wx18'D REINFORCED CO CRETE )RAINS. OUNDATI�ON...CON - -AI L__ PROPOSE -BIOEI ER IED & BE UND RDRAIN INTO TH RISER & SHALL P 'UG THE ESC DEWA ERING EORAION �� FILE. RISER RIM ELEVATION0 BE ADJUSTED TO ELEV. 3 5.'8 0 Ld J It 0 0 ial Lea L c Riprap to extend from pipe outfall to channel. RIPRAP LINED CHANNEL OUTFALL NOTES: 1. CONTRACTOR SHALL SCHEDULE A MEETING WITH AN ENGINEERING DEPARTMENT INSPECTOR AT LEAST 24 HOURS IN ADVANCE OF THE CHANNEL CONSTRUCTION. 2. CONTRACTOR SHALL INSTALL THE CHANNEL BEGINNING AT THE OUTLET OF THE PIPE AND EXTEND IT TO THE STREAM. 3. THE CHANNEL SHALL HAVE A TRAPEZOIDAL SHAPE (BOTTOM WIDTH=V) AND BE 2' DEEP WITH 3:1 SIDE SLOPES. THE CHANNEUs LENGTH SHALL BE APPROXIMATELY 96' AND HAVE A SLOPE OF 1.5%. 4. THE CHANNEL SHALL HAVE A CLASS II FILTER FABRIC UNDERLAYMENT THAT IS KEYED INTO THE EXISTING GROUND AT THE ENDS & ALONG THE ENTIRE PERIMETER A MINIMUM OF 2'. 5. PLACEMENT OF FILTER FABRIC SHALL BE DONE IMMEDIATELY AFTER SLOPE PREPARATION. EDGES OF THE FILTER SHEETS SHALL OVERLAP AT LEAST 12". 6. STONE PLACEMENT SHALL FOLLOW IMMEDIATELY AFTER PLACEMENT OF THE FILTER. RIPRAP SHALL BE PLACED SO THAT IT PRODUCES A DENSE WELL -GRADED MASS OF STONE WITH MINIMAL VOIDS. THE FINISHED SLOPE SHALL BE FREE OF POCKETS OF SMALL STONE OR CLUSTERS OF LARGE STONES. 7. RIPRAP LINED CHANNEL SHALL BE INSTALLED IN CUT, AS SHOWN, AND SHALL BE STABLE ON BOTH SIDES OF THE CHANNEL & BOTTOM. THE RIPRAP CHANNEL SHALL BE GRADED AND NOT SIMPLY PLACED ON EXISTING GROUND. THE RIPRAP SHALL EXTEND UP THE BANKS OF THE PROPOSED CHANNEL AND TO A POINT WHERE VEGETATION CAN BE ESTABLISHED TO ADEQUATELY PROTECT THE CHANNEL. 8. THE RIPRAP LINED CHANNEL SHALL HAVE A STONE DEPTH OF 2' AND SHALL CONSIST OF VDOT STD. CLASS Al STONE. THE RIPRAP SHALL BE PLACED IN A TOE TRENCH WITH AN EXTRA DEPTH AT THE TOE OF THE BANK. SMALLER STONES SHALL FILL THE VOIDS TO FURTHER REDUCE THE RISK OF MOVEMENT. RIPRAP PLACEMENT SHALL EXTEND INTO THE STREAM. PLACEMENT OF STONE WITHIN THE STREAM SHALL BE LIMITED TO THE EDGE OF THE STREAM, AND ONLY EXTEND INTO THE CHANNEL BOTTOM APPROXIMATELY 3'. 9. SEE THE 'RIPRAP ROCK SHORE PROTECTION TYPICAL DESIGN CONFIGURATION' DETAIL SHOWN ON THIS SHEET FOR A SCHEMATIC OF THE STONE AND FOR ADDITIONAL INFORMATION. PLEASE ALSO SEE THE 'BIORETENTION BASIN DETAIL' ON THIS SHEET FOR THE PLAN VIEW DESIGN OF THE RIPRAP LINED CHANNEL PROPOSED GRAVEL FLOW SPREADER. PROPOSED DESIGN INCLUDES A 12" DEEP TRAPEZOIDAL DrrCH (2' WIDE BOTTOM w/ 3:1 SIDE SLOPES) EXTENDING FROM THE YARD DRAIN TO THE SUMP's BOTTOM. GRAVEL FLOW SPREADER TO INCLUDE 12" DEPRESSION/PLUNGE POOL WITH A FLOOR ELEVATION OF 694'. — BIORETENTION BASIN PROFILE NOTES: L PROPOSED BIOFILTER TOP SURFACE ELEVATION=695.00'. 2. CONTRACTOR SHALL EXCAVATE VERTICALLY BENEATH THE BIOFILTER FLOOR TOP ELEVATION TO A DEPTH OF 4.5', OR ELEVATION 690.50'. 3. CONTRACTOR SHALL BACKFILL THIS AREA STARTING AT THE BOTTOM WITH 12" OF VDOT #57 STONE. THE PROPOSED UNDERDRAINS SHALL BE PLACED INSIDE THE #57 STONE LAYER. THE UNDERDRAINS SHALL BE SLOPED TO DRAIN & DAYLIGHT TO THE RISER AND SHALL HAVE A 12" #57 STONE SUMP LOCATED BELOW THE INVERT OF THE UNDERDRAINS. 4. PROPOSED CLEANOUTS SHALL BE INSTALLED IN ACCORDANCE WITH THE DETAIL ON THIS SHEET. THE CLEANOUTS SHALL BE INSTALLED AT CRITICAL POINTS ALONG THE UNDERDRAIN SYSTEM & AT CHANGES IN DIRECTION OF THE PIPES. 5. THE CONTRACTOR SHALL INSTALL INSTALL A 3" DEEP LAYER OF PEA GRAVEL OVER THE #57 STONE BED, WITH A 4' WIDE FILTER FABRIC CENTERED ON THE UNDERDRAINS. 6. A 3' DEEP STATE -APPROVED BIOFILTER MIX SHALL THEN BE PLACED ON TOP OF THE PEA GRAVEL. 7. THE CONTRACTOR SHALL THEN INSTALL A 3" DEEP LAYER OF SHREDDED HARDWOOD MULCH, PROFILE SCALES. { 1"=50'(H) 700 • . • r c Riprap to extend from pipe outfall to channel. RIPRAP LINED CHANNEL OUTFALL NOTES: 1. CONTRACTOR SHALL SCHEDULE A MEETING WITH AN ENGINEERING DEPARTMENT INSPECTOR AT LEAST 24 HOURS IN ADVANCE OF THE CHANNEL CONSTRUCTION. 2. CONTRACTOR SHALL INSTALL THE CHANNEL BEGINNING AT THE OUTLET OF THE PIPE AND EXTEND IT TO THE STREAM. 3. THE CHANNEL SHALL HAVE A TRAPEZOIDAL SHAPE (BOTTOM WIDTH=V) AND BE 2' DEEP WITH 3:1 SIDE SLOPES. THE CHANNEUs LENGTH SHALL BE APPROXIMATELY 96' AND HAVE A SLOPE OF 1.5%. 4. THE CHANNEL SHALL HAVE A CLASS II FILTER FABRIC UNDERLAYMENT THAT IS KEYED INTO THE EXISTING GROUND AT THE ENDS & ALONG THE ENTIRE PERIMETER A MINIMUM OF 2'. 5. PLACEMENT OF FILTER FABRIC SHALL BE DONE IMMEDIATELY AFTER SLOPE PREPARATION. EDGES OF THE FILTER SHEETS SHALL OVERLAP AT LEAST 12". 6. STONE PLACEMENT SHALL FOLLOW IMMEDIATELY AFTER PLACEMENT OF THE FILTER. RIPRAP SHALL BE PLACED SO THAT IT PRODUCES A DENSE WELL -GRADED MASS OF STONE WITH MINIMAL VOIDS. THE FINISHED SLOPE SHALL BE FREE OF POCKETS OF SMALL STONE OR CLUSTERS OF LARGE STONES. 7. RIPRAP LINED CHANNEL SHALL BE INSTALLED IN CUT, AS SHOWN, AND SHALL BE STABLE ON BOTH SIDES OF THE CHANNEL & BOTTOM. THE RIPRAP CHANNEL SHALL BE GRADED AND NOT SIMPLY PLACED ON EXISTING GROUND. THE RIPRAP SHALL EXTEND UP THE BANKS OF THE PROPOSED CHANNEL AND TO A POINT WHERE VEGETATION CAN BE ESTABLISHED TO ADEQUATELY PROTECT THE CHANNEL. 8. THE RIPRAP LINED CHANNEL SHALL HAVE A STONE DEPTH OF 2' AND SHALL CONSIST OF VDOT STD. CLASS Al STONE. THE RIPRAP SHALL BE PLACED IN A TOE TRENCH WITH AN EXTRA DEPTH AT THE TOE OF THE BANK. SMALLER STONES SHALL FILL THE VOIDS TO FURTHER REDUCE THE RISK OF MOVEMENT. RIPRAP PLACEMENT SHALL EXTEND INTO THE STREAM. PLACEMENT OF STONE WITHIN THE STREAM SHALL BE LIMITED TO THE EDGE OF THE STREAM, AND ONLY EXTEND INTO THE CHANNEL BOTTOM APPROXIMATELY 3'. 9. SEE THE 'RIPRAP ROCK SHORE PROTECTION TYPICAL DESIGN CONFIGURATION' DETAIL SHOWN ON THIS SHEET FOR A SCHEMATIC OF THE STONE AND FOR ADDITIONAL INFORMATION. PLEASE ALSO SEE THE 'BIORETENTION BASIN DETAIL' ON THIS SHEET FOR THE PLAN VIEW DESIGN OF THE RIPRAP LINED CHANNEL PROPOSED GRAVEL FLOW SPREADER. PROPOSED DESIGN INCLUDES A 12" DEEP TRAPEZOIDAL DrrCH (2' WIDE BOTTOM w/ 3:1 SIDE SLOPES) EXTENDING FROM THE YARD DRAIN TO THE SUMP's BOTTOM. GRAVEL FLOW SPREADER TO INCLUDE 12" DEPRESSION/PLUNGE POOL WITH A FLOOR ELEVATION OF 694'. — BIORETENTION BASIN PROFILE NOTES: L PROPOSED BIOFILTER TOP SURFACE ELEVATION=695.00'. 2. CONTRACTOR SHALL EXCAVATE VERTICALLY BENEATH THE BIOFILTER FLOOR TOP ELEVATION TO A DEPTH OF 4.5', OR ELEVATION 690.50'. 3. CONTRACTOR SHALL BACKFILL THIS AREA STARTING AT THE BOTTOM WITH 12" OF VDOT #57 STONE. THE PROPOSED UNDERDRAINS SHALL BE PLACED INSIDE THE #57 STONE LAYER. THE UNDERDRAINS SHALL BE SLOPED TO DRAIN & DAYLIGHT TO THE RISER AND SHALL HAVE A 12" #57 STONE SUMP LOCATED BELOW THE INVERT OF THE UNDERDRAINS. 4. PROPOSED CLEANOUTS SHALL BE INSTALLED IN ACCORDANCE WITH THE DETAIL ON THIS SHEET. THE CLEANOUTS SHALL BE INSTALLED AT CRITICAL POINTS ALONG THE UNDERDRAIN SYSTEM & AT CHANGES IN DIRECTION OF THE PIPES. 5. THE CONTRACTOR SHALL INSTALL INSTALL A 3" DEEP LAYER OF PEA GRAVEL OVER THE #57 STONE BED, WITH A 4' WIDE FILTER FABRIC CENTERED ON THE UNDERDRAINS. 6. A 3' DEEP STATE -APPROVED BIOFILTER MIX SHALL THEN BE PLACED ON TOP OF THE PEA GRAVEL. 7. THE CONTRACTOR SHALL THEN INSTALL A 3" DEEP LAYER OF SHREDDED HARDWOOD MULCH, PROFILE SCALES. { 1"=50'(H) 700 • . • r BIORETENTION BASIN CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS- 1. ROOTSTOCK OF THE PLANT MATERIAL SHALL BE KEPT MOIST DURING TRANSPORT FROM THE SOURCE TO THE JOB SITE AND UNTIL PLANTED. 2. WALLS OF PLANTING PIT SHALL BE DUG SO THAT THEY ARE VERTICAL, 3. THE DIAMETER OF THE PLANTING PIT MUST BE A MINIMUM OF SIX INCHES (6") LARGER THAN THE DIAMETER OF THE BALLOF THE TREE. 4. THE PLANTING PIT 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 THE PIT SHALL BE TAMPED BY HAND. 5. THE APPROPRIATE AMOUNT OF FERTILIZER IS TO BE PLACE ATTHE BOTTOM OF THE PIT (SEE BELOW FOR FERTILIZATION RATES). 6. THE PLANT SHALL BE REMOVED FROM THE CONTAINER AND PLACED IN THE PLANTING PIT BY LIFTING AND CARRYING THE PLANT BY ITS BALL (NEVER LIFT BY BRANCHES OR TRUNK). 7. SET 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. S. BACKFILL PLANTING PIT WITH EXISTING SOIL. 9. MAKE SURE PLANT REMAINS STRAIGHT DURING BACKFILLING PROCEDURE. 10, NEVER COVER THE TOP OF THE BALL WITH SOIL. MOUNT SOIL AROUND THE EXPOSED BALL. 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 SPACED ON THE OUTSIDE OF THE TREE BALL. UTILIZING HOSE AND WIRE THE TREE ISTO BE BRACED BYTHE STAKES, 12. BECAUSE OF THE HIGH LEVELS OF NUTRIENTS IN STORMWATER RUNOFF TO BE TREATED, BIORETENTION BASIN PLANTS SHOULD NOT REQUIRE CHEMICAL FERTILIZATION. CONTRACTOR REIV ENTS: (s PLAN'rsCr ULEFOR sPECWrCPLANTSPECM5) 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 AVAUABLE 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). 3. ALL PLANT MATERIALSHALL 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 2000s. 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 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. B. 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 BEEN 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 BYTHE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING ATALL 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 DESIGNER & COUNTY ENGINEER PRIOR TO INSTALLATION. 13. MINOR FIELD ADJUSTMENTS MAYBE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBAL L AND UTILITY CONFLICT). MAIOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER AND COUNTY ENGINEER PRIOR TO INSTALLATION, 14, NO PLANTING SHALLOCCUR WHEN THE SOIL IS FROZEN, 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOT STOCK, 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. 19. THE CONTRACTOR SHALL CONTACT THE WATER RESOURCES INSPECTOR AND COLLINS ENGINEERING 24 HOURS PRIOR TO BACKFILLING THE BIOFILTERS AND REQUEST AN INSPECTION AND APPROVAL OF THE UNDERDRAINS INSTALLATION AND THE SOIL MIX. 20. THE BIOFILTER PLANTING AREAS SHALL BE COVERED WITH HEAVY STRAW MULCH TO A DEPTH OFT' IMMEDIATELY AFTER PLANTING. FACILITY CONSTRUCTION BIORETENTION AREAS SHALL BE FULLY PROTECTED BY SILT FENCE OR CONSTRUCTION FENCING, PARTICULARLY IF THEY WILL RELY ON INFILTRATION. IDEALLY, B10RETENTION SHALL REMAIN OUTSIDE THE LIMIT OF DISTURBANCE DURING CONSTRUCTION TO PREVENT SOIL COMPACTION BY HEAVY EQUIPMENT. BIORETENTION BASIN LOCATIONS MAYBE USED AS SMALL SEDIMENT TRAPS OR BASINS DURING CONSTRUCTION THOUGH. IFTHE FACILITY IS USED AS A SEDIMENT TRAP OR BASIN, THE BIORETENTION BASIN MUST CONTAIN AN UNDERDRAIN, THE FACILJTY MUST ALSO BE CLEANED FREE OF DEBRIS, STABILIZED AND ANY STRUCTURES PROPOSED TO REMAIN, REMOVED OR CONVERTED MUST BE DETAILED OR DISCUSSED ON THE PLANS. a. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE ENTIRE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION. IT MAYBE NECESSARYTO BLOCK CERTAIN CURB OR OTHER INLETS WHILE THE BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHALL BE CHECKED FOR EXISTING UTILITIES PRIOR TO ANY EXCAVATION. 3. THE DESIGNER AND THE INSTALLER SHALL HAVE A PRE -CONSTRUCTION MEETING, CHECKING THE BOUNDARIES OFTHE CONTRIBUTING DRAINAGE AREA AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO THE ORIGINAL DESIGN. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BYTHE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER. SINCE OTHER CONTRACTQRS MAY BE RESPONSIBLE FOR CONSTRUCTING PORTIONS OF THE SITE, IT IS QUITE COMMON TO FIND SUBTLE ENTI f`;i_ THE GENERAL b FOR PROPOSED BI RET O G DIFFERENCES IN SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT CAN PRODUCE HYDRAULICALLY IMPORTANT DIF ERENCES O THE RO OSF.D O CONTRACTOR SHALL CLEARLY COMMUNICATE, IN WRITING, ANY PROJECT CHANGES DETERMINED DURING THE PRE -CONSTRUCTION MEETING TO THE INSTALLERAND THE PLAN REVIEW/INSPECTION AUTHORITY. 4. TEMPORARY E&S CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE BLORETENTION AREATO DIVERT STORMWATfR AWAY FROM THE BIORETENTION AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS EROSION CONTROL FABRICS MAY BE NEEDEDTO PROTECT VULNERABLE SIDE SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS. 5. ANY PRE-TREATMENT CELLS SHALL BE EXCAVATED FIRST AND THEN SEALED TO TRAP SEDIMENTS. 6. EXCAVATORS OR BACKHOES SHALL WORK FROM THE SIDES TO EXCAVATE THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS, EXCAVATING EQUIPMENT SHALL HAVE SCOOPS WITH ADEQUATE REACH SO THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION AREA. CONTRACTORS SHALL USE A CELL CONSTRUCTION APPROACH IN LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO Soo TO a,000 SO. FT. TEMPORARY CELLS WITH A xo-s5 FOOT EARTH BRIDGE IN BETWEEN, 50THAT CELLS CAN BE EXCAVATED FROM THE SIDE. 7. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO sZ INCHESTO PROMOTE GREATER INFILTRATION. THIS REQUIREMENT WILL BE DICTATED BYTHE INSPECTORPRIOR TO INSTALLATION OF THE REMAINDER OF THE FACILITY- B. PLACE GEOTE3CTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH A 6-INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE USED, PLACE THE APPROPRIATE DEPTH OF #57 STONE ON THE BOTTOM, INSTALL THE PERFORATED UNDERDRAIN PIPE, PACK #57 STONETO 3 INC14ES ABOVE THE UNDERDRAIN PIPE, AND ADD APPROXIMATELY31NCHES OF CHOKER STONEIPEA GRAVEL AS A FILTER BETWEEN THE UNDERDRAIN AND THE SOIL MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START WITH 6 INCHES OF #S7 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS DESCRIBEDABOVE. 9. DELIVER THE SOIL MEDIA FROM AN APPROVED VENDOR, AND STORE IT ON AN ADJACENT IMPERVIOUS AREA ORPLASTIC SHEETING. APPLY THE MEDIA INZa-INCH LIFTS UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED. WAIT A FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA, AS NEEDED, TOACHIEVE THE DESIGN ELEVATION. so. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALLTHS VEGETATION, AND WATER ACCORDINGLY. INSTALL ANY TEMPORARY IRRtGATION AS NEEDED. ai.. PLACETHE 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 9), AND HOLES OR SLITS WILL HAVE TO BE CUT IN THE MATTING TO INSTALLT1 iE PLANTS. 22. INSTALL THE PLANT MATERIALS AS SHOWN IN THE LANDSCAPING PLAN, AND WATERTHEM DURING WEEKS OF NO RAIN FOR THE FIRST TWO MONTHS. 13. CONDUCT THE FINAL CONSTRUCTION INSPECTION- THEN LOG THE GPS COORDINATES FOR EACH BIORETENTION FACILITY AND SUBMITTH EM FOR ENTRY INTO THE LOCAL MAINTENANCE TRACKING DATABASE, FACILITY MAINTENANCE: THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION: I, FOR THE FIRST 6 MONTHS FOLLOWING CONSTRUCTION, THE SITE SHALL BE INSPECTED BYTHE CONTRACTOR AT L.EASTTWICE AFTER STORM EVENTS THAT EXCEED 1/2 INCH OF RAINFALL. 2. THE CONTRACTOR SHALL LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA OR AROUND THE SIORETENTION ARREA, AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED WITH GRASS COVER. CONTRACTOR SHALL SPOT RESEED AS NECESSARY. 3. ONE-TIME, SPOT FERTILIZATION MAY BE NEEDED FOR INITIAL PLANTINGS. 4. WATERING IS NEEDED ONCE A WEEK DURING THE FIRST 2 MONTHS, AND THEN AS NEEDED DURING THE FIRSTGROWiNG SEASON (APRIL-OCTOBER), DEPENDING ON RAINFALL. emu. REMOVE AND REPLACE DEAD PLANTS. SINCE UP TO io%OF THE PLANT STOCK MAY DIE OFF IN THE FIRST YEAR, THE CONTRACTOR SHALL ME RESPONSIBLE FOR THE CARE AND REPLACEMENT WARRANTY TO ENSURE THAT VEGETATION IS PROPERLY ESTABLISHED AND SURVIVES DURING THE FIRST GROWING SEASON FOLLOWING CONSTRUCTION. THE TYPICAL THRESHOLDS BELOW W HICH REPLACEMENT 15 REQUIRED ARE go%SURVIVAL OF PLANT MATERIAL AND w00% SURVIVAL OFTREES. 6, A SPRING MAINTENANCE INSPECTION AND CLEANUP SHALL BE CONDUCTED AT EACH BIORETENTION AREA, THE FOLLOWING IS A LIST OF SOME OFTHE KEY MAINTENANCE PROBLEMS TO LOOK FOR -- A CHECK TO SEE IF 75%TO go%COVER (MULCH PLUS VEGETATIVE COVER) HAS BEEN ACHIEVED IN THE BED, AND MEASURE THE DEPTH OF THE REMAINING MULCH. B. CHECK FOR SEDIMENT BUILDUP AT CURB CUTS, GRAVEL DIAPHRAGMS OR PAVEMENT EDGES THAT PREVENTS FLOW FROM GETTING INTO THE BED, AND CHECK FOR OTHER SIGNS OF BYPASSING- C. CHECK FOR ANY WINTER- OR SALT -KILLED VEGETATION, AND REPLACE IT WITH HARDIER SPECIES, D. NOTE PRESENCE OF ACCUMULATED SAND, SEDIMENT AND TRASH IN THE PRE-TREATMENT CELL OR FILTER BEDS, AND REMOVE IT. E. INSPECT BIORETENTION SIDE SLOPES AND GRASS FILTER STRIPS FOR EVIDENCE OF ANY RILL OR GULLY EROSION, AND REPAIR IT. F. CHECK THE BIORETENTION BED FOR EVIDENCE OF MULCH FLOTATION, EXCESSIVE PONDiNG, DEAD PLANTS OR CONCENTRATED FLOWS, AND TAKE APPROPRIATE REMEDIAL ACTION. fig, CHECK INFLOW POINTS FOR CLOGGING, AND REMOVEANY SEDIMENT. H. LOOK FOR ANY BARE SOIL OR SEDIMENT SOURCES IN THE CONTRIBUTING DRAINAGE AREA, AND STABILIZE THEM IMMEDIATELY, 1. CHECK FOR CLOGGED OR SLOW -DRAINING SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SC+B MEDIA OR OTHER CAUSES OF INSUFFICIENT FILTERING TIME, AND RF<TnPF PPnPFR FILTRATION CHARACTERISTICS- (. -i-IUM APUN IrAN 4M-Z AlitV tl3ila1 csr inn i nouat Maintenance Activities for E iaretention g Mowing of grass filter sbips and bioretention turf rover At Fast 4 times a year Spot weeding, erosion repair, trash removal, .and mulch raking Twice during growing seasun Add reintorcament planting to maintain desired the vegetatiorl don'sity As needetii Rern ve invasive plants using recommended control methods Stabilize the contribufing drainagig area to prevent erosion Spring inspection and cleanup Supplement mulch to maintain a 3 inch layer Annually Prune gees and shrubs l er Ic�ivo erlirrlent in pre-treatment cells. and inflow paints Once every 2 to 3 Years a Replace the rL catch toyerr Every 3 years PLEASE SEE BELOW. FACILITY INSPECTION. CONSTRUCTION INSPECTIONS ARE CRITICAL TO ENSURE THE BIORETENTION BASINS ARE PROPERLY CONSTRUCTED AND ESTABLISHED. SECJLUSE THETIMING OF THE INSTALLATION 15 DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION- MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER AND INSPECTOR, DURING THE FOLLOWING STAGES OF THE BIOFILTER CONSTRUCTION PROCESS: x. PRE -CONSTRUCTION MEETING a. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3- EXCAVATION/GRADING (E.G-, INTERIMIFINAL ELEVATIONS) 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) 6. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITYACCEPTANCE) PLEASE ALSO SEE ABOVE, UNDER FACILITY MAINTENANCE #6, FOR REQUIRED INSPECTIONS. i t; iu iA M i712=0rm titi�P 6r al rur gL PL TIC My PL+�SFIC .�1 T iL�JS, IfiLC_ � JXt RTERSF_CTION - ..---« REMOV.AREEFOR ACCESS' , rr ISOMETRIC I NSIDE'STRUCTURE 01MEM tiS OUTSIDE STRUCTURE DIMENSION HDRE ANTWORM PLATE REQUIRED ey- AFMOY. TAIL: Landscape Specifications: The following specifications are the minimum standards that are acceptable for the installation of the plant material: l I'b contra t r sliall be responsible for adhering to the construction sequence outlined on this page for the installation Of the bioretention basin e con ac sp g �l landscaping. The Contractor shall also be responsible for locating all existing underground utilities prior to beginning construction. Any planting conflict arising from existing utility locations shall be brought to the allention of the Owner. 2. The Contractor shall be responsible for providing positive drainage at 2% minimum in all planted areas, 3. The Contractor shall verify plant count from the plan, and shall provide and install all plant materials shown on the approved plan. The plant schedule provided is for the Contractor's reference only; quantities shall be verified from the approved plan. 4. The Contractor shall guarantee all plant materials for 1 year from the date of planting, 5. The Owner or his designated agent shall approve any changes in plant material with prior approval from County Engineering. 6. All plant material shall be balled and burlapped or container grown and shall be well formed, vigorous, growing specimens with growth typical of the variety specified and free from injurious insects and diseases. 7. All trees and shrubs shall be installed as indicated on the approved landscape plan. Guidelines for Free Preservation Preservation measures shall be administered to trees within wooded areas to be maintained within the conservation/preservation areas delineated, with particular preservation effort directed toward trees with bunk diameters greater than 18 inches at breast height. All wooded preservation areas adjacent to existing residential development shall be fenced off from construction, activity with portable chain link fencing no closer than the dripline of any tree growing inside the preservation areas. All other wooded areas to remain (shall be fenced off from construction activity with 40 inch high "international change" plastic web fencing no closer than the dripline of any tree growing within the designated conservation/preservation area, wring the course of final grading, if it becomes necessary to fill within the canopy limits of existing trees, such fills shall not exceed depths greaten than six (6) inches to ensure continued saturation of the existing root mat. Prior to grading around the trees, all vegetation shall be stripped fiom the fill areas and fertilizer shall be applied. Should it become necessary to cut within the canopy limits, all disturbed rants shall be protected from exposure to the air. The crown the reduced root system. The trees shall be fertilized upon completion of grading activities in leaf surface shall be proportionately reduced to balance the area. Any damaged portions of trees within wooded areas to be mainfUtined shall be immediately addressed to promote expedient recovery. Further measures for tree protection shall be adhered, as Outlined in Chapter 3.38 "Tree Preservation &Protection" of the Virginia Erosion and Sediment Control Handbook. REFER 10 TREE SI AKiNG DETAIL TRENCH EDGE AROUND ENT;RE AREA TO BE NIUL CHED REFER TO FOOTBALL P`,T DETAIL NOTES 1. SET TREE PLA,J JB PRIOR TO STAKING. AL' PRUNING IS RESTIC RTED TO THE REMOVAL. OF DEAD AND BROKEN BRA?NOHES .AND 1- SHALL BE PERFORMED UNDER THE SUPERVISION OF THE LANDSCAPE ARCHITECT. TREE PLANTING TREE GUYING DETAIL CONSISTS OF 2 CUYS SET 120' AROUND PLANT Fir ON 'UPHILL- SIDE REFFR TO TREE. ST,%iKIN., DETAIL C:O1vl'r'ACT-XC;AVA T ED SOIL O FORM RO:JTB.ALL FIT ON DOWNHILL SIDE OF TREE TREI`!CH EDGE AROUND ENTIRE AREA 10 BE MIU L C; iE D ?cFEfi TO ROOTBAIA PIT DETAIL 0G1"BALL NOTES: 1. SET TREE PLUMS PRIOR TO STAKING l i f� RA.f HE AfJi_ � �h. O� DEALT AND BROKEN R 1L. S S't fED 7C. THE REM' �,AL �. ALL PRUNING IS RE HI SMALL BE PERFORMED WNDFR THE SUPERVISION OF THE LANDSCAPE ARCHITECT TREE PLANTING ON SLOPE 12 SECTION ( N.T.S. IL '^ • _ = III x - r 7±1 BOTANICAL COMMON DAME SZE SVtfM FACILITY OL)ANTITY COVERAGE (sf SC SCIRPUS CYPERINUS WOOLGRASS - - 75 At ASCLEPIAS INCARNATA SWAMP MILKWEED - - 550 PV PAN ICUM VIRGATUM SWITCHGRASS - - 60 MC MYRICA CERIFERA WAX MYRTLE 2-1/2" CAL. 3 - IG ILEXGLABRA INKBERRY 2-1/2" CAL. 5 - IBN BETULA NIGRA RIVER BIRCH 2" CAL. 1 - AR ACER RUBRUM RED MAPLE 2-1/2" CAL. 1 - LS LIQUIDAMBAR STYRACIFLUA SWEETGUM 1-1/2" CAL. 2 - NOTES _.._-. . - 1 SET TREE F'LUv:B PRIOR TO STAKING. 2- ALL PRUNING IS RESTRICTED TO THE REMOVAL OF DEAD AND BROKEN BRANCHES AND SHALL BE PERFORMED UNDER THE SUPERVISIC•N OF THE LANDSCAPE ARCHITECT, 3, DO NOT ALLOW AIR POCKFTS TO FORM WHILE BACKF'LUNG. 4 IMMEDIATELY SOAK PLAN' Nd!TH WATER. 5. SEE IRRIGATION PLANS/DETAILS/SPECIFICATIONS AS THEY RELATE TO THIS INSTALLATION, SPECIMEN SHRU ;AS SPECIFIED 0 DRAWING? REFER TO ROIJ DEFAII - RENCH EDGE AROUND NTIRE AREA, TO BE ULCHED BACKFILL TO TERMINATE, AT TOP OUTSIDE LIMITS OF ROOTBALL If \ RTO TREE STFlVG DER ADD MULCH OVERTOP OF P,OOTBALL AND PLANTING PIT LIMITS, BEGIN;;ING AT NO MORE THAN 1" DEPTH Al rRUNK AND TAPERING U: ; O A DEPTH OF 3" AT PLANTING PIT I_.MITS, ?HEN TAPER TO PROPOSED FiP:iSHED GRADE II \ 1' j . VAR(-S fROOTBALL :_• OUT AWAY Al.s. WIRE BASKET BACKFILL WITH CUt.TiVATFD, %/� .�' //� /Tf� f ORIGiNA; SOIL' FRO ('PLANT ANDJD? NON-BIODEuRADABLE �\�\\ f//�\,�� t\1.:`` ?iT EXC/tVATION IF LOOSE. IF FOOTBALL WRAPPING AFTER f EXCAVATED MATERIAL IS NOT FINAL TREE PLACEMENT". / \ LOOSE, SUBSTITUTE WITH BURLAP ROOTSALL WRAPPING TO BE UNTIED FROM TRUNK 1 1 ACCEPTABLE TOPSOIi_ ,, AND CUT AWAY TO A POINT MATERIAL. MMEND BACKFILL PER SPECIFICATIONS. COMPACT AT LEAST 1/2 D!81A1,JCE DOWN 1 BACKFILL IN LIFTS BY FOOT. FOOTBALL. WATER THROUGHLY AT 1/2 DEPTH. SCARIFY BASE OF PLANT PIT i� WHEN EXCAVATING PIT: BREAK RETURN AND COMPACT LOOSE `0SEN AL AND( - TE) MATERIAL TOTHROUGH EXCAVA HARDPANREMOVEAS PLANT PIT TO ESTABLISHED NECESSARY TO FACIi.ITATE PROPER DEPTH PRIOR TO GRAINAGEI PLANT PLACEMENT' NOTES: 1. NOTIFY LANDSCAPE ARCHITECT OF ANY SITUATION WHERE SOIL CHARACTERIST!CS ARE NOT AGREEABLE" TO THESE PLANTING CR;TERIA OR WHERE CONDITIONS RAISE CONCERNS IN TFRNiS OF PLANT . UR''u`1VA8.Li IY OR WARRANTY. 2. CONTRACTOR TO NOTIFY LANDSCAPE ARCHITECT O ANY PLANT DAMAGE EXPOSED BY, INCURRED DURING.0 . Ok IP PLANTING PROCESS SECTION N.T,B. r+ R+ = w c a t - x • 3 r1g. K • k SECTION II:3S � -.a:.. tc�.wF�< R PRE- DEVELOPMENT SWM PIAN: SCALE 1'�--80' _mw soft 444 4444* w--------- SH SCOTT R.' COLJINS�� No. 35791 ?6 1;115 h') Z A *mk� I/ ; " I- RtOXAL N*� Lli N --------- Sim OF 24, 10V � OVERLAND FLOW w/ A ELEV.=4', _j Lu 0 j LLJ 4-90' OF CONC. J, 1,365' OF CHANNEL uj ft/s Z 0 vl THE ADD jffdNAL DRAINA �(2.29a�c�)&IM CCO �llb"I �" �G PERVIOUS AREA ACCO �A Wj575 Sf) ASSOCIATED WIT HE EMERGENCY ACCESS �j uj HEW IWAD BEING REDIRECTED T1 !rH ACCO UNTE C:) RMWATER U Ln FOR IN THESTO NTrry (DA A&B) &,QUALITY QUA (YRRM) CALCULATIONS FOR THJS PHASE 9F THE z z P P uj f)EVELOPMENT,R OFF SHEET, FLOWS /FROM T�HE 0 0 uj Lu u m x x TR( .... ... EMERGENCYACCES ROAD INTO THE PROPOSED DITCH. THE RUNOFF ISTHIEN DIRECTED 11 HE ST AM SEWER% Z 0 0 8 UALLYIOUtFALI NTO,THE 0 u SYSTEM -WHERE IT EVENT 71 r, ED i(IPRAP LINE[ F, ­4 ­4 ce 0 L) PROPOS CHAKNEL. 4> LR uj ce 0 BE- -MAINTAINED. THE 0 U) 0 Dft$ OUTFACE SHALL 72A-4 Z Z in LL uj uj z TING z I - Q U3 c /VEGETATIOf z C25 ---------- VE S"LOPES IN THE EXISTING ROADSID En Z r 3 CHANNELSHALEBE, ICI OVED WITH > 0 Z U 7.V "_ _.. / , .. d ✓. t ., S %' THE ADDITION OF RIPRKP BENEATH THE rL w UJ 0 0 0 PR.QPQSED CULVpKt. 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