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HomeMy WebLinkAboutWPO201800010 Plan - E&S Erosion Control Plan 2018-03-22M lip] mm I mm telviTAWAAMI mml=:Flll=mmtlmlzim SITE DATA OWNER / DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC EASEMENTS: CONTACT: DAVE BROCKMAN SHALL BE RECORDED PRIOR CELL: (702)-985-9088 GENERAL dave@ oldtrailvillage.com NOTES FOR OLD TRAIL VILLAGE 1005 HEATHERCROFT CIRCLE, SUITE 100 CROZET VA, 22932 PLAN PREPARER: ROUDABUSH, GALE, & ASSOCIATES, INC. 914 MONTICELLO ROAD CHARLOTTESVILLE, VA. 22902 (434)-977-0205 TAX MAP PARCEL: 055EO-01-00-000A2 PARCEL AREA: 23.226 ACRES DRAINAGE DISTRICT: SLABTOWN BRANCH TO THE LICKINGHOLE DRAINAGE BASIN WATERSHED: S. RIVANNNA RESEVOIR TOPOGRAPHY: COMPLIED FROM FIELD RUN SURVEY BY ROUDABUISH, GALE & ASSOCIATES O DATED APRIL, 2015, LOUISA AERIAL SURVEYS, AUGUST 2012 AND GIS DATA i• LAYERS FROM ALBEMARLE COUNTY OFFICE OF GEOGRAPHIC DATA SERVICES >o Y2013 ELEVATION DATA, TOPOGRAPHY - 2 FOOT CONTOUR INTERVALS. DATUM: VERTICAL - NAVD 88, HORIZONTAL - NAD 83 CRITICAL SLOPES: CRITICAL SLOPES EXIST WITHIN THE PROJECT LIMITS. GRADING ACTIVITY IS �< PLANNED WITH THIS PROJECT IN ACCORDANCE WITH APPROVED ZMA. THE LIMITS W OF THE CRITICAL SLOPES WERE DETERMINED BY THE ANALYSIS OF THE EXISTING rQ TOPOGRAPHY FROM THE AERIAL SURVEY AND GIS CONTOUR DATA. SEE PLAN 1w Q88 FOR LOCATION. FLOODPLAIN: PORTIONS OF THIS PROJECT ARE LOCATED WITHIN THE FEMA FLOODPLAIN LIMITS ccolql m AS SHOWN ON FLOOD INSURANCE RATE MAP COMMUNITY PANEL NUMBER 510006 0237 D. EFFECTIVE DATE: FEBRUARY 4, 2005. j THERE WILL BE NO FILL OPERATIONS ASSOCIATED WITH THIS PROJECT WITHIN u' THE FEMA FLOODPLAIN LIMITS. STORMWATER: AS DEFINED BY THE OVERALL SWM MASTER PLAN WP0201600009, APPROVED ON 4/25/2016, EASEMENTS: ALL PROPOSED EASEMENTS SHALL BE RECORDED PRIOR TO CONSTRUCTION. GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS),THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ,ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10, ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:00 AM TO 91:00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, (MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILIITIES, WHERE APPLICABLE, ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. AMIN S Di FOR BLOCK 312 ALBEMARLE COUNTY, VIRGINIA 0 z PROJECT SITE ... ..... 11 101 1 NW6161 L M :J WAA 0 VICINITY MAP I SCALE: 1 "=1000 FEET F, EROSION & SEDIMENT CONTROL LEGEND SAF 3.01 r� r� SAFETY FENCE C E 3.02 CONSTRUCTION ENTRANCE CRS 3.03 R S STA BILZ UCTIOATIONN ROAD S F 3.05 X SILT FENCE DU 3.12 bkhl �� DIVERSION S B 3.14 S B SEDIMENT BASIN P 3.18 OUTLET PROTECTION USC 3.17 USC UTILITY STREAM CROSSING S R 3.29 SR SURFACE ROUGHENING Tcj 3.31TS TEMPORARY SEEDING PS 3.32 PS PERMANENT SEEDING TP 3.38 T Tn TREE PROTECTION OC 3.39 +DC DUST CONTROL TOTAL DISTURBED AREA = 6.40 ACRES foo _we`� 00 SHEET INDEX SHEET 1 ---------- COVER SHEET SHEET 2 ---------- EXISTING CONDITIONS & SOILS SHEET 3 ---------- BORROW AREA EROSION CONTROL PLAN SHEET 4 ---------- EROSION CONTROL NARRATIVE SHEET 5 ---------- EROSION CONTROL NOTES & DETAILS SHEET 6 ---------- EROSION CONTROL NOTES & DETAILS t • • • 111 11• • , SEDIMENT CONTROL PLANS (CONT.) 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN !MILLET. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT .STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180 LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY, SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL. SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 21, THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G). 22. PERMANENT VEGETATION SHALL. BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS ,AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B). ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN REVIEWING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7: ALL DISTURBED ARES ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION HAS BEEN ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND, AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 1. ALL DAMS A,ND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNIICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONISTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS 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 CONTRGL INSPECTOR. � vj O :. '-, � 9 Jm; Taggart Lic. No. �4��,?IONAL 221141 ��S,� L''' F / ll� w a. • wz � 8m <Il4 \ -r • VICINITY MAP I SCALE: 1 "=1000 FEET F, EROSION & SEDIMENT CONTROL LEGEND SAF 3.01 r� r� SAFETY FENCE C E 3.02 CONSTRUCTION ENTRANCE CRS 3.03 R S STA BILZ UCTIOATIONN ROAD S F 3.05 X SILT FENCE DU 3.12 bkhl �� DIVERSION S B 3.14 S B SEDIMENT BASIN P 3.18 OUTLET PROTECTION USC 3.17 USC UTILITY STREAM CROSSING S R 3.29 SR SURFACE ROUGHENING Tcj 3.31TS TEMPORARY SEEDING PS 3.32 PS PERMANENT SEEDING TP 3.38 T Tn TREE PROTECTION OC 3.39 +DC DUST CONTROL TOTAL DISTURBED AREA = 6.40 ACRES foo _we`� 00 SHEET INDEX SHEET 1 ---------- COVER SHEET SHEET 2 ---------- EXISTING CONDITIONS & SOILS SHEET 3 ---------- BORROW AREA EROSION CONTROL PLAN SHEET 4 ---------- EROSION CONTROL NARRATIVE SHEET 5 ---------- EROSION CONTROL NOTES & DETAILS SHEET 6 ---------- EROSION CONTROL NOTES & DETAILS t • • • 111 11• • , SEDIMENT CONTROL PLANS (CONT.) 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN !MILLET. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. PERMANENT .STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180 LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY, SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL. SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 21, THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G). 22. PERMANENT VEGETATION SHALL. BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS ,AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B). ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN REVIEWING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -7: ALL DISTURBED ARES ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION HAS BEEN ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND, AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 1. ALL DAMS A,ND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNIICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONISTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS 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 CONTRGL INSPECTOR. � vj O :. '-, � 9 Jm; Taggart Lic. No. �4��,?IONAL 221141 ��S,� L''' F REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE JANUARY 26, 2018 SCALE AS SHOWN CONTOUR INTERVAL N/A ll� w a. • wz � 8m <Il4 • Q z1,0 c\l O 0Z i• �W >o ) g OU w� �< W rQ UQ 1w Q88 W il. Z� ccolql m < j u' 3: • 01= r� IL o3',q 0 w �, it rr } -o W 20 Z 0) w 0 z a O REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE JANUARY 26, 2018 SCALE AS SHOWN CONTOUR INTERVAL N/A FILE NUMBER 8053 SHEET 1 of 8 ll� a. • • c\l Ir i• • � i w� �< cccr • < j 3: • 01= cr• FILE NUMBER 8053 SHEET 1 of 8 REVISIONS COUNTY COMMENTS MARCH 5, 2018 1 ®ATE JANUARY 2S, 201$ SCALE 1 "=40' CONTOUR INTERVAL 2 FEET FILE NUMBER 8053 SHEET 2of6 f C s 0 cm �r Ir 01; 0 (D.J.. m E C. f w 3:0 0 f cr 0 o FILE NUMBER 8053 SHEET 2of6 -� L)I IFC n^' nm-� ��----_�'m /u /nx~V�/ f ... .. 'WEST VILLAGE CZ/ IFC \u N -------�/AbYL//y� � ``, 24 141N. C�U/VER �' SHALL BE JIVISTALLED -\ REVISIONS COUNTY COMMENTS MARCH 5,2018 FILE NUMBER 8053 ow CL o o < im 0 3: 0 im FILE NUMBER 8053 91 EROSION AND SEDIMENT CONTROL NARRATIVE PRIOR TO CONSTRUCTION 1. OWNER SHALL POST SURETY BONDS FOR CONSTRUCTION, EROSION & SEDIMENT CONTROL. 2. CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). BONDING FOR WORK WITHIN THE VDOT RIGHT-OF-WAY MAY BE REQUIRED TO OBTAIN THE PERMIT. 3. CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ). 4. CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. 5. A PRE -CONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THIS PROJECT PROPOSES TO PROVIDE A BORROW AREA FOR THE NECCESSARY DIRT VOLUME THAT IS NEEDED FOR THE DENSTOCK APARTMENT PROJECT. THE EXCESS DIRT WILL BE HAULED FROM BLOCK 32 ONTO THE ADJACENT PROPERTY. GRADING INVOLVED WITH THIS BORROW PLAN WILL COINCIDE WITH FINAL SITE PLAN GRADES FOR THE UPCOMING DEVELOPEMENT OF BLOCK 32. LIMITS OF DISTURBANCE WILL INCLUDE APPROX. 6.40 ACRES. EXISTING SITE CONDITIONS THE CURRENT CONDITONS OF BLOCK 32 CONSISTS OF MODERATE TREE COVER WITH VIRGIN SOL TERRAIN WHICH IS BOUNDED BY STREAMS TO THE NORTH AND SOUTH OF -THE PROPERTY. ADJACENT AREAS THE SOUTHERN ADJACENT AREAS CONSISTS OF MULTI -FAMILY DEVELOPMENTS OF BLOCKS 19, 24, 25, AND 33 OF OLD TRAIL VILLAGE. TO THE NORTH OF THE PROJECT CONSISTS OF BLOCK 22 AND DENSTOCK APARTMENTS. OLD TRAIL DRIVE RUNS ALONG THE EASTERN SIDE OF THE DEVELOPMENT. OFF-SITE AREAS ALL EXCESS MATERIAL GENERATED AS PART OF THIS PROJECT SHALL BE HAULED TO A LOCATION WITHIN THE OLD TRAIL DEVELOPMENT THAT HAS BEEN APPROVED BY THE COUNTY OF ALBEMARLE COMMUNITY DEVELOPMENT DEPARTMENT. 1631 36C--HAYESVILLE LOAM, (7% TO 15% SLOPESZ DEEP, MODERATELY SLOPING AND WELL DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM, CLAY, SANDY CLAY LOAM, AND FINE SANDY LOAM. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH. SURFACE RUNOFF IS MEDIUM. HAZARD OF EROSION IS SLIGHT. 26C3 - DYKE CLAY LOAM, SEVERELY ERODED, (7% TO 15% SLOPE) DEEP, MODERATELY SLOPING AND WELL DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF CLAY LOAM, CLAY, AND GRAVELLY CLAY. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH TO HIGH. SURFACE RUNOFF IS MEDIUM. HAZARD OF EROSION IS SLIGHT. 37D3 - HAYESVILLE CLAY LOAM, SEVERELY ERODED, 0 5% TO 25% SLOPES) SOIL IS DEEP, STRONGLY SLOPING AND WELL DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF CLAY LOAM, CLAY, SANDY CLAY LOAM, AND FINE SANDY LOAM. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH. SURFACE RUNOFF IS HIGH. HAZARD OF EROSION IS MODERATE. 4E - ASHE LOAM. (25% TO 45% SLOPES) DEEP, STRONGLY SLOPING AND SOMEWHAT EXCESSIVELY DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM, SANDY LOAM, AND BEDROCK PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS LOW. SURFACE RUNOFF IS MEDIUM. HAZARD OF EROSION IS MODERATE 25B - DYKE SILT LOAM, (2% TO 7% SLOPES) DEEP, NEARLY LEVEL AND WELL DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF SILT LOAM, CLAY, AND GRAVELLY CLAY. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH TO HIGH. HAZARD OF EROSION IS SLIGHT. 7B - BRADDOCK LOAM, (2% TO 7% SLOPES) DEEP, NEARLY LEVEL AND WELL DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM AND CLAY. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH. HAZARD OF EROSION IS SLIGHT. 77 - RIVERVIEW-CHEWACLA COMPLEX. (0% TO 2% SLOPES) DEEP, NEARLY LEVEL WELL DRAINED SOILS ON FLOODPLAINS. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM AND SILT LOAM OR SILT CLAY LOAM. PERMEABILITY IS HIGH WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH. OCCASIONAL FREQUENCY OF FLOODING. HAZARD OF EROSION IS SLIGHT. CRITICAL AREAS A. WETLANDS AND STREAM CROSSINGS THE CONSTRUCTED HAUL PATH WILL SHARE THE SAME ALIGNMENT AS THE FUTURE SANITARY SEWER FROM THE WEST VILLAGE CZI SEWER CONNECTOR. THIS HAUL ROAD WILL CROSS OVER AN INTERMITTENT STREAM. AT THE COMPLETION OF THE EXCESS DIRT REMOVAL, THE HAUL PATH RETURN TO ITS NATURAL STATE UNTIL THE SANITARY SEWER LINE IS CONSTRUCTED. B. STEEP SLOPES THE CONSTRCUTION OF THE BORROW AREAS WILL DISTURB CRITICAL SLOPE AREAS, WHICH IS SHOWN ON THE OLD TRAIL ZMA. PERMANENT SEEDING AND MATTING SHALL BE USED STABILIZE ALL SLOPES STEEPER THAN 3H:1 V STRUCTURAL PRACTICES 1. SAFETY FENCE (3.01) - A TEMPORARY SAFETY FENCE SHALL BE CONSTRUCTED WHERE DEEMED NECESSARY DURING CONSTRUCTION TO PROTECT THE MANHOLES AND SANITARY LINE FROM CONSTRUCTION TRAFFIC. 2. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - A TEMPORARY CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT SITE ENTRANCE OFF OF OLD TRAIL DRIVE. 3. ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTES SHALL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING. 4. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN. 5. SUPER SILT FENCE BARRIER - WIRE -REINFORCED SILT FENCE BARRIER WILL BE INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.29) - ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES. 2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31)-- AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 14 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 1 4. PERMANENT SEEDING (3.32 - AREAS BROUGHT TO FINAL GRADE OR THOSE CONSTRUCTION AREAS THAT WILL REMAIN DORMANT FOR YEAR OR MORE SHALL BE STABILIZED WITH A PERMANENT SEED MIXTURE ACCEPTABLE TO THAT TIME OF YEAR. PREPARE SURFACE WITH APPROVED TREATMENT AND ADDITIVES PRIOR TO APPLYING SEED. 5. MULCH (3.35 - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 6. EROSION CONTROL BLANKETS (3.36). - EROSION CONTROL BLANKETS IN CONJUNCTION WITH PERMANENT SEEDING WILL BE INSTALLED ON ALL SLOPES STEEPER THAN 3:1 FOLLOWING GRADING. EROSION CONTROL BLANKETS WILL ALSO BE INSTALLED IN DITCHES WHERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY ENGINEERING CALCULATIONS. THIS WILL PROTECT FROM RILL AND GULLY EROSION. 7. TREE PROTECTION (3.381 - THE TREE FENCE BARRIER WILL BE INSTALLED TO PROTECT THE TREES OUTSIDE OF THE LIMITS OF DISTURBANCE AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN. 8. DUST CONTROL (3.39) - DUST CONTROL METHODS MUST BE USED TO REDUCE THE AMOUNT OF AIRBORNE DUST DURING ALL PHASES OF CONSTRUCTION WHERE SOIL IS EXPOSED OR DISTURBED. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BE SEQUENCED, AND ALSO BEGIN AND END AS QUICKLY AS POSSIBLE. 2. THE CONSTRUCTION ENTRANCE AND PERIMETER EROSION CONTROL MEASURES SUCH AS TREE PROTECTION AND SILT FENCE SHALL BE INSTALLED AS THE FIRST STEP OF DISTURBANCE. 3. SEDIMENT BASIN MEASURES SHALL BE INSTALLED WITH PERIMETER SILT FENCE PRIOR TO ANY GRADING AND SHALL BE SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. 4. THE SEDIMENT BASIN SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE DESIGN VOLUME OF THE WET STORAGE. 5. TEMPORARY SEEDING OR OTHER STABILIZATION METHODS, SUCH AS BASE AGGREGATE WILL FOLLOW IMMEDIATELY AFTER REACHING FINAL GRADES. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED TO ESTABLISH GROWTH.. 7. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 8. DURING FINE GRADING OPERATIONS, MAINTAIN ALL DIVERSION DITCHES TO THE SEDIMENT TRAPS. THE SEDIMENT TRAPS SHALL REMAIN FUNCTIONAL THROUGHOUT INSTALLATION OF THE STORM SEWER INLETS, PIPES,OUTFALLS. 9. INSTALL SILT FENCE INLET PROTECTION TRAPPING MEASURES AT EACH INLET LOCATION WITHIN THE DITCH WHERE APPLICABLE. 10, WHILE THE SEDIMENT BASIN REMAINS FUNCTIONAL FOR THE DISTURBED AREA, INSTALL THE PERMANENT EXTENDED DETENTION PONDS AND OUTLET PROTECTION MEASURES PER THE SPECIFICATIONS. 1 1, AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND THE SEDIMENT TRAPS CAN BE FILLED IN AND SEEDED, THEREBY REDIRECTING DRAINAGE TO THE PERMANENT FACILITIES, 12, THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE HOMEOWNERS ASSOCIATIONS TO ENSURE THAT THEY ARE STRUCTURALLY SOUND AND HAVE NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT, GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. THE DAM SECTION SHALL BE KEPT FREE OF SAPLINGS OR TREES.(REFER TO THE ADDITIONAL MAINTENANCE SPECIFICATIONS) PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEED IMMEDIATELY FOLLOWING FINISHED GRADE. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE W17H SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PRiOTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. EROSION CONTROL MAINTENANCE 1. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 2. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT THE TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 3. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 4. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 5. STORMWATER CONVEYANCE CHANNELS (WHERE APPLICABLE): 5.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 5.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 5.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE: CAPACITY OF THE CHANNEL. 6. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO INSURE THE CENTER OF EACH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 7. THE EARTHEN EMBANKMENTS SHALL BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. 8. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE HOMEOWNERS ASSOCIATIONS TO ENSURE THAT THEY ARE STRUCTURALLY SOUND AND HAVE NOT BEEN DAMAGED BY EROSION. 9. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. 10. THE DAM SECTION SHALL BE KEPT FREE OF SAPLINGS OR TREES.(REFER TO THE ADDITIONAL MAINTENANCE SPECIFICATIONS) 11. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. IN THE EVENT THAT THE APPLIED SEEDING FAILS TO TAKE HOLD, BLANKET MATTING SHALL BE PLACED IN APPROPRIATE AREAS DEEMED NECESSARY BY THE ENGINEER OR EROSION CONTROL INSPECTOR. SEQUENCE OF CONSTRUCTION 1. AFTER OBTAINING ALL REQUIRED PERMITS THE CONTRACTOR SHALL COORDINATE A PRE -CONSTRUCTION MEETING, ALLOWING 72 HOURS FOR ITS COORDINATION. 2. INSTALL CONSTRUCTION ENTRANCE OFF OF OLD TRAIL DRIVE. 2.1. SHOULD THE TEMPORARY CONSTRUCTION ENTRANCE OFF OF OLD TRAIL DRIVE NOT BE MAINTAINED PROPERLY OR AN EXCESSIVE AMOUNT OF SOIL FOUND TRACKED ONTO THE NT PUBLIC H P I ROADWAY, THEN A PAVED CONSTRUCTION ENTRAN(CE, WATER TANKER TRUCK WITH TWO (2) PRESSURE WASHERS AND A SETTLING AREA MAY BE REQUIRED BY THE EROSION AND SEDIMENT CONTROL PROGRAM ADMINISTRATOR. 3. CLEARING AND GRUBBING SHALL FIRST BE LIMITED TO THAT NECESSARY TO INSTALL SILT FENCE, TREE PROTECTION AND OTHER PERIMETER CONTROLS. SAFTEY FENCE SHALL BE INSTALLED FOR PROPER PROTECTION OF EXISITNG WETLANDS SHOWN HEREON THIS PLAN. ALL PERIMETER CONTROLS MUST BE MADE FUNCTIONAL PRIOR TO ANY UPSLOPE LAND DISTURBANCE THAT TAKES P LAC E. 3.1. INSTALL TREE PROTECTION AT THE PERIMETER OF THE LIMITS OF DISTURBANCE WITHIN THE WOODED AREAS. 3.2. SILT FENCE SHALL BE; INSTALLED ON THE DOWNHILL SIDE OF THE ACTIVE TRENCHING OPERATIONS. 4. PRIOR TO ADDITIONAL CLEARING AND GRUBBING, THE CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE. 5. CLEAR AND GRUB THE REMAIiNDER OF PROJECT AREA. 5.1. THE LAND DISTURBANCE SHALL BE RESTRICTED TO THE LIMITS OF DISTURBANCE SHOWN IN THE APPROVED EROSION CONTROL PLANS. 5.2. THESE LIMITS ARE CONFINED TO THE PROPERTY OWNED BY OLD TRAIL FOR THE BLOCK 32 BORROW AREA. 6. STOCKPILE TOPSOIL WITHIN AN AREA ON THE PROPERTY OWNED BY OLD TRAIL AT A LOCATION APPROVED BY ALBEMARLE COUNTY COMMUNITY DEVELOPMENT. INSTALL SILT FENCE AT THE PERIMETER OF STOCKPILE(S). 7. DENUDED AREAS SHALL DRAIN TO AN APPROVED EROSION CONTROL MEASURE AT ALL TIMES DURING CONSTRUCTION. 8. CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE ABLEMARLE COUNTY SERVICE AUTHORITY, PRIOR TO MAKING THE SEWER SYSTEM OPERATIONAL. 9. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 10. LIME, FERTILIZE AND APPLY TEMPORARY OR PERMANENT SEEDING TO ALL DENUDED AREAS IMMEDIATELY' AFTER ACHIEVING FINAL GRADES. 11. ALL PERMANENT SLOPES STEEPER THAN 3:1 SHALL RECEIVE STABILIZATION WITH LANDSCAPING VEGETATION HARDIER THAN GRASS, WHICH WILL NOT REQUIRE MOWING. 12. AFTER SITE IS STABILIZED AND PERMISSION IS OBTAINED FROM THE EROSION CONTROL INSPECTOR, REMOVE SILT FENCING AND OTHER REMAINING EROSION CONTROL MEASURES. EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS 1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT ALLOW ANY SEDIMENT TO EXIT THE PROJECT LIMITS. 2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. CONTRACTOR TO PROTECT STOCKPILE AREAS WITH SILT FENCE. 3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT {VEGETATION SHALL NOT BE CONSIDERED (ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. ' CONTRACTOR SHALL ESTABLISH A VEGETATIVE COVER ON ALL DENUDD AREAS. 4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. CONTRACTOR SHALL ESTABLISH THE PERIMETER CONTROLS OF SUPER SILT FENCE AS THE FIRST STEP OF THE LANDS DISTURBANCE FOR THIS PROJECT. 5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AFTER EACH RAINFALL EVENT. s 6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE'SERVED BY THE TRAP OR BASIN. THERE ARE NO SEDIMENT TRAPS OR BASINS PROPOSED. A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN TIHREE ACRES. B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A 25 -YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED. 7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED.THERE ARE NO PROPOSED CUT- OR FILL SLOPES. HOWEVER, THE CONTRACTOR IS TO RESTORE THE PROJECT AREA TO EXISTING GRADE. IF THE AREAS WITH NATURALLY STEEP SLOPES ARE FOUND TO BE ERODING EXCESSIVELY AFTER ONE YEAR, CONTRACTOR IS TO PROVIDE ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. 8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. MAXIMIZE SHEETFLOW AND GROUNDWATER INFILTRATION 9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED.CONTRACTOR TO NOTIFY ENGINEER AND COUNTY EROSION CONTROL INSPECTOR. 10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT.THERE ARE NO STORM SEWER INLETS PROPOSED. 11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL.THERE ARE NO STORMWATER CONVEYANCE CHANNELS OR PIPES PROPOSED. 12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NON -ERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN (FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NON -ERODIBLE COVER MATERIALS.CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS. 13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NON -ERODIBLE MATERIAL SHALL BE PROVIDED.CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS. 14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE M1ET.CONTRACTOR SHALL FOLLOW FOLLOW ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS. 15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABiL12ED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED.CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS. 16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA: A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME. B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTIH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF-SITE PROPERTY. D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE' STABILIZATION. E. RE -STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS CHAPTER. F. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED WITH. CONTRACTOR TO ADHERE TO THE APPLICABLE STANDARD FOR PRIVATE AND PUBLIC UTILITY INSTALLATION. 17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL [DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES.CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ADJACENT ROADS CLEAN FROM SOIL BUILD-UP. 18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION.CONTRACTOR SHALL STABILIZE SITE, AND OBTAIN INSPECTOR APPROVAL PRIOR TO REMOVING EC MEASURES. UPON APPROVAL OF THE ENVIRONMENTAL INSPECTOR, INSTALL INFILTRATION AREAS AND CONNECT ROOF DRAINS. 19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF :STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATION AND RELOCATION PROJECTS THAT INCORPORATENATURAL CHANNEL DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS:THIS PROJECT DOES NOT INCLUDE ANY ADDITIONAL IMPERVIOUS SURFACES AND THE PROJECT AREA )WILL BE RESTORED TO ITS EXISTING CONIDTIONS.THEREFORE WILL NOT PRODUCE ANY ADDITIONAL STORMWATER RUNOFF. A. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN -(MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFORMED. B. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED USING THE VSMP CHANNEL PROTECTION CRITERIA. STORMWATER DISCHARGES ARE CLASSIFIED INTO ONE OF THREE TYPES OF CHANNEL. (1) "MANMADE STORMWATER CONVEYANCE SYSTEM" MEANS A PIPE, DITCH, VEGETATED SWALE, OR OTHER STORMWATER CONVEYANCE SYSTEM CONSTRUCTED BY MAN EXCEPT FOR RESTORED STORMWATER CONVEYANCE SYSTEMS OR, (A) THE MANMADE STORMWATER CONVEYANCE SYSTEM SHALL CONVEY THE POST -DEVELOPMENT PEAK FLOW RATE FROM THE TWO-YEAR EVENT WITHOUT CAUSING EROSION OF THE SYSTEM DETENTION OF THE STORMWATER OR DOWNSTREAM IMPROVEMENTS MAY BE INCORPORATED INTO THE APPROVED LAND-DISTURBIING ACTIVITY TO MEET THIS CRITERIA AT THE DISCRETION OF THE STORMWATER PROGRAM ADMINISTRATIVE AUTHORITY. (B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE SYSTEMS SHALL BE MET. QDEVELOPED <= I.F. * (QPRE-DEV. * RVPRE- DEV.) / RVDEVELOPED UNDER NO CONDITION SHALL QDEVELOPED > Q PRE -DEV. NOR SHALL QDEVELOPED BE REQUIRED TO BE LESS THAN THAT QFOREST * RVPRE-DEV.)/RVDEVELOPED OR IN ACCORDANCE WITH ANOTHER METHODOLOGY THAT IS DEMONSTRATED BY THE VSMP AUTHORITY TO ACHIEVE EQUIVALENT RESULTS AND IS APPROVED BY THE BOARD. (2) "NATURAL STORMWATER CONVEYANCE SYSTEM" MEANS THE MAIN CHANNEL OF A NATURAL STREAM AND THE FLOOD -PRONE AREA ADJACENT TO THE MAIN CHANNEL OR, (3) "RESTORED STORMWATER CONVEYANCE SYSTEM" MEANS A STORMWATER CONVEYANCE SYSTEM THAT HAS BEEN DESIGNED AND CONSTRUCTED USING NATURAL CHANNEL DESIGN CONCEPTS. RESTORED STORMWATER CONVEYANCE SYSTEMS INCLUDE THE MAIN CHANNEL AND THE FLOOD -PRONE AREA ADJACENT TO THE MAIN CHANNEL. (A) THE DEVELOPMENT SHALL BE CONSISTENT, IN COMBINATION WITH h OTHER STORMWATER RUNOFF, WITH THE DESIGN PARAMETERS OF THE RESTORED STORMWATER CONVEYANCE SYSTEM THAT IS FUNCTIONING IN ACCORDANCE WITH THE DESIGN OBJECTIVES. (B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE SYSTEMS SHALL BE MET. SEE 19(B)(1)(B). WORK AREA PROTECTION & MAINTENANCE 1. ALL FENCES REQUIRED TO BE REMOVED OR DISTURBED BY CONSTRUCTION SHALL BE SALVAGED, STORED, PROTECTED AND RE -INSTALLED BY CONTRACTOR AT THE DIRECTION OF AND LOCATION DESIGNATED BY THE PROJECT MANAGER. IF SUCH FENCE MATERIAL CANNOT BE REUSED DUE TO DAMAGE CAUSED BY CONTRACTOR, CONTRACTOR SHALL INSTALL NEW FENCE OF THE SAME TYPE OF MATERIAL. TEMPORARY FENCING REQUIRED BY PRIVATE PROPERTY OWNERS SHALL BE PROVIDED BY CONTRACTOR. CONTRACTOR IS ADVISED TO CONTACT PROPERTY OWNERS AT LEAST FORTY-EIGHT (48) HOURS IN ADVANCE OF REMOVING ANY FENCE IN ORDER TO COORDINATE RELOCATION AND/OR PROTECTION OF ANY ANIMALS, AND TO ESTABLISH AND CONFIRM WITH THE OWNER THE PRE -CONSTRUCTION CONDITION OF ANY FENCE TO BE REMOVED, DISTURBED OR REPLACED. 2. CONTRACTOR IS PERMITTED TO WORK IN THE PUBLIC RIGHT-OF-WAY (FOLLOWING ISSUANCE OF VDOT APPROVAL) AND ANY TEMPORARY OR PERMANENT EASEMENT (FOLLOWING VERIFICATION OF EXISTENCE OF EASEMENT) SHOWN ON THE PLANS. HOWEVER, CONTRACTOR SHALL NOTIFY PROPERTY OWNER(S) FORTY-EIGHT (48) HOURS PRIOR TO WORKING ON ANY PRIVATE PROPERTY TO GAIN AND COORDINATE ACCESS AND TO DETERMINE A STORAGE AREA FOR MATERIALS IF NEEDED. COORDINATION OF ACCESS TO PUBLIC RIGHT--OF-WAY AND STORAGE OF MATERIALS THEREON SHALL BE COORDINATED WITH VDOT AND THE PROJECT MANAGER. CONTRACTOR'S FAILURE TO SO NOTIFY AND COORDINATE WITH PROPERTY OWNERS AND/OR THE PROJECT MANAGER MAY RESULT IN DELAYS. 3. CONTRACTOR SHALL, AT HIS EXPENSE, MAINTAIN THE WORK SITE IN A CLEAN AND ORDERLY APPEARANCE AT ALL TIMES. ALL DEBRIS AND SURPLUS MATERIAL COLLECTED SHALL BE DISPOSED OF OFF THE WORK SITE BY CONTRACTOR, AT HIS EXPENSE. 4. EXISTING LAWNS, TREES, SHRUBS, FENCES, UTILITIES, CULVERTS, WALLS, WALKS, DRIVEWAYS, POLES, SIGNS, RIGHT-OF-WAY MONUMENTS, MAILBOXES AND THE LIKE SHALL BE PROTECTED FROM DAMAGE DURING THE WORK. ANY DAMAGE CAUSED TO SUCH ITEMS SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST. PROPERTY PINS DISTURBED BY CONTRACTOR THAT ARE NOT SHOWN ON THE PLANS TO BE DISTURBED SHALL BE RESTORED BY A LICENSED SURVEYOR AT CONTRACTOR'S EXPENSE. 5. CONTRACTOR SHALL EMPLOY EROSION CONTROL DEVICES AND METHODS AS REQUIRED TO MEET THE REQUIREMENTS AND INTENT OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE THE NECESSARY DIVERSION DITCHES, DIKES OR TEMPORARY CULVERTS REQUIRED TO PREVENT MUD AND DEBRIS FROM BEING WASHED ONTO THE STREETS OR PROPERTY, CONTRACTOR'S VEHICLES SHALL BE KEPT CLEAN TO PREVENT MUD OR DUST FROM BEING DEPOSITED ON STREETS. NO AREA SHALL BE LEFT DENUDED FOR MORE THAN SEVEN (7) CALENDAR DAYS. VEGETATION 1. PRIOR TO REMOVING ANY VEGETATION, CONTRACTOR SHALL MEET WITH THE PROPERTY OWNERS AND THE PROJECT MANAGER TO REVIEW THE LIMITS OF CONSTRUCTION AND OBTAIN PERMISSION TO REMOVE VEGETATION REQUIRED TO DO THE WORK. 2.TREE AND PLANT ROOTS OR BRANCHES THAT MAY INTERFERE WITH THE WORK SHALL BE TRIMMED OR CUT ONLY WITH THE APPROVAL OF THE PROJECT MANAGER. ANY TREES OR PLANTS WHICH ARE SHOWN TO REMAIN THAT DO NOT INTERFERE WITH THE WORK, BUT ARE DAMAGED BY CONTRACTOR OR HIS SUBCONTRACTORS, SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST. 3. CONTRACTOR SHALL CLEAN UP, RESTORE, SEED AND MAINTAIN ALL DISTURBED AREAS IMMEDIATELY UPON COMPLETION OF WORK ON EACH SITE. TOPSOIL, SEED, FERTILIZER AND MULCH SHALL BE PLACED IN ACCORDANCE WITH ESC AUTHORITY STANDARDS ON ALL DISTURBED AREAS. A PERMANENT STAND OF GRASS ADEQUATE TO PREVENT EROSION SHALT_ BE ESTABLISHED PRIOR TO FINAL ACCEPTANCE. 4. THE ACT OF RESEEDING SHALL NOT QUALIFY AS "STABILIZED". THE CONTRACTOR SHALL BE RESPONSIBLE TO ESTABLISH VEGETATION, NOT SIMPLY APPLY SEED AND MATERIALS. EROSION & SEDIMENT CONTROL LEGEND D 3.01 -: 0 SAFETY FENCE C E 3.02 D�� _ "� CONSTRUCTION ENTRANCE & 3.03 @S STABILIZATION ABILZAT ONROAD D 3.05 n )( ___* SILT FENCE s3.12 DIVERSION SEDIMENT BASIN OUTLET PROTECTION UTILITY STREAM CROSSING SURFACE ROUGHENING TEMPORARY SEEDING g�j 3.32 PS PERMANENT SEEDING T P 3.38TP-ter TREE PROTECTION �� 3.39 �C DUST CONTROL r,to. H op P�4 �`-- ,. A i / +-a .--)-) / Jimmy L. Taggart Lic. No. �6 o�22841 tel, �ssI0NAL S` � pri REVISIONS ,LINTY COMMENTS MARCH 5, 201 8 DATE JANUARY 26, 201 S SCALE N/A CONTOUR INTERVAL N/A FILE NUMBER 8053 SHEET 4 of +6 Owe i 000%% i • • • cr. z • vj 11 0 3: �- > �i i 0' Z a < N X�i 21 �. . .0 , � � 0 � rt T Lu 300 w � FILE NUMBER 8053 SHEET 4 of +6 CONSTRUCTION ENTRANCE .__ ti SM -2A, Y Ri,ALI i' 1 il i F 4 I F " R FIL SECTION A -A A awiiiinjin watei ral) of 1 ifich iiliFt be i4i; t711a d �Avitls 1 ilifililrLlm I uia:l b allco& Aluta:l t 111x° tllil�l4 iu>t� i °; ii li e � 'it1 i a:lritlr t r +�I L. uiclai f bi Bila r4�i to +."d}MA,Int l:ar es"glr�. Y,, a;Ai Ta(t " 11111st be catlietl Iw av il(111110)c o1fiaiic'e to ;ars d�j:ptxt i;r r�a.l ditlua� ;ri a a t+ � iiil , ~ ,:lixtieiit. X11. a � lusxa lit stiEall be p, eveated fioal a lit iiii�F tdaiiil d] ai u, ditches III w,a(el,c alme's. PAVED WASH RACK. OSAF SAFETY FENCE SOURCE: CONWED PLASTICS PLATE. 3.1-1 VDOT ROAD AND BRIDGE STANDARDS VA. DSWC Dv DIVERSION 10% SETTLEMENT TYPICAL VEE -SHAPED DIVERSION Source: Va. DSWC Plate 3.12-1 TP TREE PROTECTION FENCING AND ARMORING DRIP UNE SNOW FENCE BOARD FENCE ........................ ........................ CORRECT TRUNK ARMORING 00 TRIANGULAR BOARD FENCE Snurnwe Va. DSCW Plate 3.38-2 TEMPORARY SEEDING MIXTURES FOR rs THE PIEDMONT AREA TABLE 26 TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES 1. REFER TO UDSA APPROVED GUIDELINES. will Planting depth Seeding zones �Q and Seeding Date Species M Per Lbs/1000 a o 7a and 7b 6b 6a and 5b GENERAL SLOPE (3:1 OR LESS) acre(inches) ft (Inches) 2/1- 5/1- 8/15- 3/1- 5/1- 8/15- 3/15- 6/1- 8/1- 6• INSTALL MATS TO CREATE A MINIMUM TEN 30-10-10 FOOT BRIDGE WIDTH. -__ 4/30 8/14 11/30 .•.•i -••--- �.- . 4._i" 11/15 5/31 7/31 V. Choose one: NECESSARY TO MAINTAIN BRIDGE STRENGTH 9.2 AND INTEGRITY. 3. IMMEDIATELY REMOVE ANY DEBRIS WHICH BY ENTERS THE STREAM AT THE CROSSING t BY 1 BY Barley 2.5 bu. 2.80 1-2 X - 10/15 . __01 - 10/15 X - 10/1 Oats 3 bu. 2.21 1-2 X - - X - - X 500 '11.5 Rye (4) 2.5 bu. 3.22 1-2 X - X X - X X - X Ilk- Weeping Spring the year Not required. not closer Lovegrass & following than 4" if occasional Rye Plus 150 Ibs. 3.45 1 X X 10/15 X i . i i i i.• - 10/15 X X ►•ii•iii-i-i-iii•11•iii-•-i+i-i-i�,••ii :•:•:•.•.•.•.•.•.•.•.•11•.•.•.•.•.•.•.•..,x.-.�.+.,. Foxtail years thereafter. .•iiiiiiii•••ia•i-iii•••••.•i�••i!- X �\ X X .i -.+.-i•.•.•.•.•...-. X X X millet 5 days later December, May bluegrass; and closer bluegrass, hard 20-10-10 po 2.3 20 -June -30, if than 3" for fescue. RIM_ VIle gra lovegrans lo 4lbs. 0.09 1/4-1/2 - X SOURCE: CONWED PLASTICS PLATE. 3.1-1 VDOT ROAD AND BRIDGE STANDARDS VA. DSWC Dv DIVERSION 10% SETTLEMENT TYPICAL VEE -SHAPED DIVERSION Source: Va. DSWC Plate 3.12-1 TP TREE PROTECTION FENCING AND ARMORING DRIP UNE SNOW FENCE BOARD FENCE ........................ ........................ CORRECT TRUNK ARMORING 00 TRIANGULAR BOARD FENCE Snurnwe Va. DSCW Plate 3.38-2 TEMPORARY SEEDING MIXTURES FOR rs THE PIEDMONT AREA sF SILT FENCE CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE S UPPOR T) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH TJPSLOPE ALONG THE LINE OF STAKES. 9 6'MAX. h, FLOW 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) 4" FILL AND COMPACT EXCAVATED SOIL. SF/STONE NOT REQLJIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) SUGGESTED TEMPORARY SE FERTILIZER: 10-2(0-10: 1,000 LBS/ACRE f SEPTEMBER- FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16-APFRIL 30: ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. t SUGGESTED PERMANENT SEEDING MIXTURE LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16 -AUGUST 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16 -OCTOBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE use TEMPORARY STREAM CROSSING OPTION FOR FOREST MANAGEMENT SURFACE FLOW DIVERSION G�� �I) Ynl%0 s ■ ■ /4 SUPPORTED J- 1/4 SUPPORTED `ORIGINAL STREAMBANK TABLE 26 TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES 1. REFER TO UDSA APPROVED GUIDELINES. Seeding Rate Planting depth Seeding zones �Q and Seeding Date Species M Per Lbs/1000 a o 7a and 7b 6b 6a and 5b GENERAL SLOPE (3:1 OR LESS) acre(inches) ft (Inches) 2/1- 5/1- 8/15- 3/1- 5/1- 8/15- 3/15- 6/1- 8/1- 6• INSTALL MATS TO CREATE A MINIMUM TEN 30-10-10 FOOT BRIDGE WIDTH. -__ 4/30 8/14 11/30 4/30 8/14 11/15 5/31 7/31 10/31 Choose one: NECESSARY TO MAINTAIN BRIDGE STRENGTH 9.2 AND INTEGRITY. 3. IMMEDIATELY REMOVE ANY DEBRIS WHICH BY ENTERS THE STREAM AT THE CROSSING t BY REMOVAL NOTES: BY Barley 2.5 bu. 2.80 1-2 X - 10/15 X - 10/15 X - 10/1 Oats 3 bu. 2.21 1-2 X - - X - - X 500 '11.5 Rye (4) 2.5 bu. 3.22 1-2 X - X X - X X - X Barley or Weeping Spring the year Not required. not closer Lovegrass & following than 4" if occasional Rye Plus 150 Ibs. 3.45 1 X X 10/15 X X 10/15 X X 10/1 Foxtail years thereafter. X X X X X X X X X millet 5 days later December, May bluegrass; and closer bluegrass, hard 20-10-10 100 2.3 20 -June -30, if than 3" for fescue. fescue mixture: VIle gra lovegrans lo 4lbs. 0.09 1/4-1/2 - X - - X - - X - Annual ryegrasS 50 lbs. 1.15 1/4-1/2 X - 11/1 X - 11/1 X - 8/15 Millet (7) 50 lbs. 1.15 1/2 - X - - X - X - (1) Applicable on slopes of 3:1 or flatter (2) Refer to figure A - Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990 (3) Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed (4) May be used as a nurse crop for late fall/early winter permanent seedings, add 56 lbs/ac. to the permanent seeding mixture (4) Maryland State Highway Administration Temporary Seed Mix (5) May be used as a nurse crop for mid -summer permanent seedings. Add 2 lbs/ac to permanent seed mix. (6) May be used as a nurse crop for mid -summer permanent seedings. Add 10 lbs/ac. to the permanent seeding mix. sF SILT FENCE CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE S UPPOR T) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH TJPSLOPE ALONG THE LINE OF STAKES. 9 6'MAX. h, FLOW 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) 4" FILL AND COMPACT EXCAVATED SOIL. SF/STONE NOT REQLJIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) SUGGESTED TEMPORARY SE FERTILIZER: 10-2(0-10: 1,000 LBS/ACRE f SEPTEMBER- FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16-APFRIL 30: ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK. t SUGGESTED PERMANENT SEEDING MIXTURE LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16 -AUGUST 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16 -OCTOBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE use TEMPORARY STREAM CROSSING OPTION FOR FOREST MANAGEMENT SURFACE FLOW DIVERSION G�� �I) Ynl%0 s ■ ■ /4 SUPPORTED J- 1/4 SUPPORTED `ORIGINAL STREAMBANK ■ 401LAKX1111 H& ■ . ■ M140= TF M, TABLE 25 INSTALLATION NOTES: MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 1. REFER TO UDSA APPROVED GUIDELINES. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 2. USE A BULLDOZER, KNUCKLEBOOM LOADER, 0 O OR SKIDDER TO INSTALL & REMOVE DRAGLINE o a MATS. a o 3. KEEP HEAVY EQUIPMENT OUT OF STREAM. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 4. INSTALL WATER DIVERSION DEVICES (WATER GENERAL SLOPE (3:1 OR LESS) BARS, TURNOUTS, BROAD-BASED DIPS, ETC.) ANCHOR BRIDGEMAT TO ON BOTH SIDES OF THE MATS. A TREE, OR OTHER 5. STABILIZE EXPOSED MINERAL SOIL WITH TREE PERMANENT OBJECT TOPS OR BRUSH DURING MAT INSTALLATION, WITH SUFFICIENT 400 STRENGTH, USING STEEL AND SEEDING/MULCH AFTER MAT REMOVAL. CHAIN OR CABLE. 6• INSTALL MATS TO CREATE A MINIMUM TEN 30-10-10 FOOT BRIDGE WIDTH. -__ MAINTENANCE NOTES: desired. 1. KEEP MATS' SURFACE FREE OF MINERAL SOIL 9,0o ��Cy`ygy AND DEBRIS THAT COULD ENTER STREAM. 2. PERIODICALLY CHECK MAT HARDWARE; Da not mow crownvetch RETIGHTEN NUTS & CABLE CLAMPS AS 0-20-0 NECESSARY TO MAINTAIN BRIDGE STRENGTH 9.2 AND INTEGRITY. 3. IMMEDIATELY REMOVE ANY DEBRIS WHICH ENTERS THE STREAM AT THE CROSSING t LOCATION. REMOVAL NOTES: 1. CLEAN OFF BRIDGE SURFACE. 2. REMOVE MATS BY USING MAT CABLE LOOP OR SKIDDER GRAPPLE. 3. PERMANENTLY STABILIZE DISTURBED PORTIONS SURFACE FLOW OF STREAM BANK AND APPROACH ROADS WITH DIVERSION PERENNIAL GRASSES/MULCH (OR WETLAND MIX WHEN APPLICABLE). 4. LEAVE APPROPRIATE WATER DIVERSION Not required. not closer STRUCTURES IN PLACE ON BOTH SIDES OF _ STREAM. ■ 401LAKX1111 H& ■ . ■ M140= TF M, TABLE 25 TOTAL LBS. PER ACRE MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 175-200 LBS. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 95-100% - IMPROVED PERENNIAL. RYE GRASS 0-5% - KENTUCKY BLUEGRASS 0-5% HIGH MAINTENANCE LAWN 200-250 LBS. - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 100% GENERAL SLOPE (3:1 OR LESS) Tall fescue makes - KENTUCKY 31 FESCUE 128 LBS. - RED TOP GRASS 2 LBS. - SEASONAL NURSE CROP* 20 LBS. LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1) 400 KENTUCKY 31 FESCUE 108 LBS. - RED TOP GRASS 2 LBS. SEASONAL NURSE CROP* 20 LBS. CROWN VETCH** 20 LBS. TOTAL 150 LBS. *USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: FEBRUARY 16TH THROUGH APRIL 30THI............ ANNUAL RYE MAY 1ST THROUGH AUGUST 15TH ................ FOXTAIL MILLET AUGUST 16TH THROUGH OCTOBER 31ST ........... ANNUALRYE NOVEMBER 1 ST THROUGH FEBRUARY '15TH ........ANNUAL RYE *** SUBSTITUTE SERICEA LESPEDEZA FOR (CROWNVETCH EAST OF FARMVILLE, VA (MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE UNHULLED SERICEA.) IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED. WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 10- 20 LBS./ACRE IN MIXES. ■ ■T 101 1011114 • TABLE 24 Maintenance Fertilization for Permanent Seedings Use Soil Test Recommendation or Rates Shown Below Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing Acre 1000 sf Tall fescue makes 10-10-10 500 '11.5 Yearly, or as *Not closer than 3" if up 70% or more or 400 g 2 needed fall occasional mowing is of cover. 30-10-10 desired. crownvetch Spring the year Da not mow crownvetch Service lespedeza 0-20-0 400 9.2 fallowing t establishment Birdsfaot trefoil 4 and every 4-5 1 years thereafter. of . Fairly uniform i Fall the year Not required. not closer stand of Tall : following than 4" if occasional Tescue & Service 5-10-10 500 '11.5 establish- ment mowing is desired, and lespedeza, or and every 4-5 then in fall after seed Birdsfoot Trefoil. years thereafter. has matured. Weeping Spring the year Not required. not closer Lovegrass & following than 4" if occasional Service lespedeza 5-10-10 500 11.5 establishment mowing is desired, and fairly uniform plant and every 3-4 fall after sericea has distribution years thereafter. matured. Red & chewings 20-10-10 250 5.8 September, 30 Mow no closer than 2" for red fescue and Ky fescue, Kentucky days later December, May bluegrass; and closer bluegrass, hard 20-10-10 100 2.3 20 -June -30, if than 3" for fescue. fescue mixture: needed. RECOMMENDED DEWATERING S YS TEM FOR SEDIMENT BASINS PROVIDE ADEQUATE STRAPPING POLYETHYLENE CAP _ J _ DEPTH TACK WELD VARIES AS -- � REQUIRED POLYETHYLENE FOR" DR;Y " - DRAINAGE TUBING, DIAMETER STORAGE: VARIES (SEE CALCULATIONS IN e APPENDIX 3.14-A) WET " FERNCO-STYLE " COUPLING STORAGE: DEWATERING ORIFICE, SCHEDULE 40 STEEL STUB 1 -FOOT MI�IMUM, DIAMETER VARIES (SEE CALCULATIONS IN CORRUGATED METAL RISER APPENDIX 3.14-A) NOTE: WITH CONCRETE RISER, USE PVC SCHEDULE 40 STUB FOR DEWATERING ORIFICE DRAINAGE TUBING SHALL COMPLY WITH ASTM F667 AND AASHTO M294 SOURCE: VA. DSWC PLATE. 3.14-15 �LTH of d GS Jimmy L. Taggart Lic. No. 22841 SSjONAL DAM CONSTRUCTION NOTES: 1. GEOTECHNICAL CONSULTANT TO SPECIFY DAM EMBANKMENT MATERIAL, SEEPAGE CONTROL DEVICES, CUT-OFF TRENCH DESIGN, CULVERT BEDDING REQUIREMENTS, AND OTHER APPROPRIATE GEOTECHNICAL DESIGN REQUIREMENTS. 2. IMPERVIOUS CORE SHALL EXTEND TO- THE 10 YR WATER SURFACE ELEVATION UNLESS OTHERWISE NOTED. 3. FOUNDATION AND ABUTMENT AREA EXTENDING 10' BEYOND DAM FOOTPRINT SHALL BE CLEARED, GRUBBED AND STRIPPED OF ALL VEGETATION TOPSOIL AND/OR ORGANIC SOIL AND OTHER UNSUITABLE MATERIALS. 4. AFTER CLEARING, GRUBBING, STRIPPING, AND REMOVING ANY OTHER UNSUITABLE MATERIALS, THE SUBGRADE SHALL BE PROOF -ROLLED WITH COMPACTION EQUIPMENT UNDER THE OBSERVATION OF A QUALIFIED ENGINEER. THE COMPACTION EQUIPMENT SHALL CONSIST OF THE HEAVIEST POSSIBLE EQUIPMENT THAT WILL NOT CAUSE DISTURBANCE OF SUITABLE SUBGRADE SOILS. EXCESSIVELY SOFT OR UNSUITABLE MATERIALS SHALL BE REMOVED AND REPLACED WITH COMPACTED FILL. WHERE ROCK IS EXPOSED AFTER STRIPPING OR UNDERCUTTING, ALL LOOSE ROCK MATERIAL SHALL BE REMOVED PRIOR TO PLACING COMPACTED FILL. ROCK SUBGRADES SHALL BE INSPECTED AND APPROVED BY INSPECTOR OR ENGINEER PRIOR TO PLACEMENT OF FILL. 5. COMPACTED FILL SHALL NOT BE PLACED PRIOR TO PERFORMING THE REQUIRED FOUNDATION AND ABUTMENT PREPARATION, OR ON ANY FROZEN SURFACE. COMPACTED FILL SHALL EXTEND TO THE FILL LIMIT LINES AND GRADES INDICATED ON THE APPROVED CONSTRUCTION PLAN. COMPACTED FILL MATERIAL SHALL BE OF THE TYPE CLASSIFICATION SYMBOL SPECIFIED BY THE GEOTECHNICAL CONSULTANT, OR OF A BETTER QUALITY MATERIAL AS DEFINED BY THE UNIFIED SOIL CLASSIFICATION SYSTEM (USCS). RESTRICTIONS ON LIQUID LIMIT AND PLASTICITY INDEX OF MATERIAL MAY BE INCLUDED WHERE APPLICABLE. COMPACTED FILL SHALL CONSIST OF MATERIAL FREE OF ORGANIC MATTER, RUBBISH, FROZEN SOIL, SNOW, ICE, AND PARTICLES WITH SIZES LARGER THAN 3" OR ANY OTHER DELETERIOUS MATERIAL. 6. COMPACTED FILL SHALL BE PLACED IN HORIZONTAL LAYER of 10"-12" IN LOOSE THICKNESS. ACTUAL LIFT THICKNESS SHALL BE SPECIFIED BY THE GEOTECHNICAL CONSULTANT. THE MOISTURE CONTENT SHALL BE CONTROLLED SUCH THAT COMPACTION IS ACHIEVED WITHOUT YEILDING OF THE SURFACE. EACH LAYER SHALL BE UNIFORMLY COMPACTED WITH SUITABLE COMPACTION EQUIPMENT TO AT LEAST 95% OF STANDARD PROCTOR MAXIMUM DENSITY IN ACCORDANCE WITH ASTM D-698, AASHTO T-99, OR VDOT SPECIFICATIONS. ANY LAYER OF FINE GRAINED FILL WHICH BECOMES SMOOTH SHALL BE SACRIFICED TO A DEPTH OF 2" TO ALLOW ADEQUATE BONDING BETWEEN LAYERS. 7. COMPACTED FILL WITH A MOISTURE CONTENT WHICH WILL NOT PERMIT COMPACTION TO THE SPECIFIES DENSITY STANDARD SHALL BE SACRIFICED, DRIED, OR WETTED AS NECESSARY TO PERMIT PROPER COMPACTION. DATE JANUARY 26, 2018 SCALE N/A CONTOUR INTERVAL N/A 4 i • i. a • s t 4 " 1 4 of . i 1 !' : 2 • DATE JANUARY 26, 2018 SCALE N/A CONTOUR INTERVAL N/A j FILE NUMBER 8053 SHEET 50ff� �I i 4 " 4 2 j FILE NUMBER 8053 SHEET 50ff� 675 670 665 ..6 655 650 645 640 635 630 625 0+00 +20 +40 +60 Con Iq otof rn tb (0 of r- 1L (0ttoo� tpt0� U � U nOP OUTLET PROTECTION TEMPORARY ME AD "LAUMMLWO +80 1+00 +20 +40 +60 cD O cca O u) co (00- (0,*- t0 to cp tD U U PIPE OUTLET CONDITIONS A / PIPE OUTLET TO FLAT AREA WITH NO DEFINED CHANNEL PLAN VIEW L a 0% d SECTION A -A FILTER CLOTH KEY IN 6"-9'; RECOMMENDED FOR ENTIRE � E PERIMETER A A ado (MIN.) do PIPE OUTLET TO WELL DEFINED CHANNEL PLAN VIEW L a 0 d SECTION A -A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-4. 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. Source: Va. DSWC ■n Plate 3.18-1 +80 2+00 +20 +40 +60 cD Storage(CF) Storage(CY) TEMPORARY SEDIMENT BASIN PARAMETERS *PARAMTERS TO REMAIN FOR BMP CONVERSION TO EXTENDED DETENTION -SEE WP0201600009 NOTE: THIS TEMPORARY SEDIMENT BASIN IS DESIGNED IN Drainage Area= 5.85 acres Multiple Outlet Design 644.000 828.562 Outflow 661.054 ACCORDANCE WITH FINAL SWM CONVERISON PARAMETERS AS SCALE 1" = 5' VERTICAL 104.495 Wet Storage- Water Surface Elevation: Minimum Volume Req'd. _ PART OF FACILITY "S-13" UNDER THE APPROVED MASTER 5 \ UPPER ANCHOR TABS 650.96 Available Basin Volume Prov'd. = Outlet #1: Riser, Drop Pipe WPO PLAN 201600009 397 cy @ 649.50. \ 636 Depth to Cleanout Elev. = 1.00 ft Riser Base Elev: •,0ffi Dry Storage- Riser Diameter: METAL OR 1,/8" STEEL PLATE. Minimum Volume Req'd. = Orifice Coefficient: 670 67 cy * 5.85 acres = 392 cy Weir Coefficient: 2.5 Available Basin Volume PFgv'd. = Culvert Length: q 409 cy @ 652.25 Culvert Diameter: 4" Dewatering Orifice Invert = 649.50 Culvert Invert Out: N W, Cleanout Elev. = 648.50; Culvert Friction Coefficient: 665 , 04`- O Culvert Entrance Loss Coefficient: C Basin Design Elevations: `' Discharge: Top of Dam = 654.00 WELDED ATTACHMENT PLAN VIEW w un 25' Emergency Spillway = 652.00 Outlet #2: Emergency Spillway, Weir EN THE TOP IS Design High Water = 651.22 (25 -Year Storm) Shape: LU Crest of 60" RCP Riser _ 651.00 Side Slope Ratio (V:H): 660 Toe of Dam = 642.00 Crest Length: AOPEN TTACHED. Invert Elevation: Principal Spillway Desi n:; Coefficient: RCP Riser Dia. = 60" Number of Openings: o Discharge: 655 Trash Rack Ht. = 29 \ N RCP Barrel Length = 105.0' RCP Barrel Dia. = 36" Orifice Design (SWM Conversion Only) SCALE IN FEET Inv. Out 36 RCP Barrel 640.25 Shape: RCP Barrel Slope=1.67% Diameter: H Invert Elevation: 650 f SCALE 1" = 20' HORIZONTAL T Number of Openings: _ET Calculation Result Headwater Elevation: Tailwater Elevation: 645 I Discharge: Velocity: \ Q 640 1`` TOP OF EMBANKMENT=654.00 0 E W.S.E. 25-YR=651.22 s W.S.E. 10-YR=650.96 W.S.E. 2-YR=649.06 1. THE CYLINDER MUST BE 18" LOWER ANCHOR TABS °.. ,'P,° BOLT TO RCP RISER ' /TIN n FIRMLY FASTENED TO THE �4) 1.5"X1.5'7(8" ANGLE v ? " e PEER ° c TOP OF THE RISER. (4) 3/8 X2" GALVANIZED BOLTS G ° G a. (8) 3/8" WASHERS 6 X 12" ° SUPPORT BAR SIZE 20 10 0 20 40 SPACER BAR ° ° (#6 REBAR MIN.) ' n , ° '' : °�' •; TO THE TOP OF THE RISER (TYPICAL) • a. °• . .'. SCALE IN FEET OR ATTACHED BY STRAPS ° . a ° . °. BOLTED TO TOP OF RISER. 3:1 ,o �0 \ \3:1 (ARIABLE EXI ITNG SLOPE �O \ O TOP F DAM=654. 0 4" DEWATERI G \ ORIFICE=649 50 APPR X. LOCATION OF FUTURE 25' EME GENCY BI RETENTION FACILITY ° , \ SPILLWAY 652.00 3:1 L 3:1 24" MIN. TEMPORARY CULVE 6 RCP RISE\ / \ INTO SEDIMENT BAST W/ OU (2) FUTURE8"0 OP=651.00 4. \ PROTECTION ORIFI=64 .00 / INV. IN =645.00 Y , INV. OUT - - 44.00 17, °• a.° i v 4 a J .. BOTTOM OF SEDIMENT BASIN = 642,CO OUTLET PROTECTI N SEE DESIGN DETAILS FOR 105' OF 36" RCP BARREL DIMENSIONS INV IN=642. 0 NV OUT=64 .25 SLOPE=1.6 % +80 1+00 +20 +40 +60 cD O cca O u) co (00- (0,*- t0 to cp tD U U PIPE OUTLET CONDITIONS A / PIPE OUTLET TO FLAT AREA WITH NO DEFINED CHANNEL PLAN VIEW L a 0% d SECTION A -A FILTER CLOTH KEY IN 6"-9'; RECOMMENDED FOR ENTIRE � E PERIMETER A A ado (MIN.) do PIPE OUTLET TO WELL DEFINED CHANNEL PLAN VIEW L a 0 d SECTION A -A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-4. 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. Source: Va. DSWC ■n Plate 3.18-1 +80 2+00 +20 +40 +60 cD 635 RISER STRUCTURE- CREST=651.00 630 625 OUTLET PROTECTION SPECIFICATIONS Sediment Basin 'Stage -Storage Report PROJECTED SATURATED AREA Ls=Y(Z+4)*(1 +S/0.25 -S) Ls=t35 Elev(Ft) Storage(CF) Storage(CY) TEMPORARY SEDIMENT BASIN PARAMETERS *PARAMTERS TO REMAIN FOR BMP CONVERSION TO EXTENDED DETENTION -SEE WP0201600009 680 Drainage Area= 5.85 acres Multiple Outlet Design 644.000 828.562 Outflow 661.054 Basin Desian Volumes: I Total Discharge: 104.495 Wet Storage- Water Surface Elevation: Minimum Volume Req'd. _ Tailwater Elevation: 675 67 cy * 5.85 acres = 392 cy UPPER ANCHOR TABS 650.96 Available Basin Volume Prov'd. = Outlet #1: Riser, Drop Pipe O 397 cy @ 649.50. Riser Top Elev: 636 Depth to Cleanout Elev. = 1.00 ft Riser Base Elev: •,0ffi Dry Storage- Riser Diameter: METAL OR 1,/8" STEEL PLATE. Minimum Volume Req'd. = Orifice Coefficient: 670 67 cy * 5.85 acres = 392 cy Weir Coefficient: O Available Basin Volume PFgv'd. = Culvert Length: q 409 cy @ 652.25 Culvert Diameter: 4" Dewatering Orifice Invert = 649.50 Culvert Invert Out: N W, Cleanout Elev. = 648.50; Culvert Friction Coefficient: 665 , 04`- O Culvert Entrance Loss Coefficient: C Basin Design Elevations: `' Discharge: Top of Dam = 654.00 WELDED ATTACHMENT PLAN VIEW w un 25' Emergency Spillway = 652.00 Outlet #2: Emergency Spillway, Weir EN THE TOP IS Design High Water = 651.22 (25 -Year Storm) Shape: LU Crest of 60" RCP Riser _ 651.00 Side Slope Ratio (V:H): 660 Toe of Dam = 642.00 Crest Length: AOPEN TTACHED. Invert Elevation: Principal Spillway Desi n:; Coefficient: RCP Riser Dia. = 60" Number of Openings: Trash Rack Dia. = 90" Discharge: 655 Trash Rack Ht. = 29 Velocity: N RCP Barrel Length = 105.0' RCP Barrel Dia. = 36" Orifice Design (SWM Conversion Only) Inv. Out 36 RCP Barrel 640.25 Shape: RCP Barrel Slope=1.67% Diameter: H Invert Elevation: 650 f Coefficient: T Number of Openings: _ET Calculation Result Headwater Elevation: Tailwater Elevation: 645 I Discharge: Velocity: 640 1`` TOP OF EMBANKMENT=654.00 0 E W.S.E. 25-YR=651.22 s W.S.E. 10-YR=650.96 W.S.E. 2-YR=649.06 635 RISER STRUCTURE- CREST=651.00 630 625 OUTLET PROTECTION SPECIFICATIONS Sediment Basin 'Stage -Storage Report PROJECTED SATURATED AREA Ls=Y(Z+4)*(1 +S/0.25 -S) Ls=t35 Elev(Ft) Storage(CF) Storage(CY) Area(SF) 642.000 0;.000 0.000 192.659 644.000 828.562 30.687 661.054 SEDIMENT BASIN/EXTENDED DETENTION 646.000 21821.361 104.495 1361.270 OUTFLOW 2 WCM 0.0 C.Y: CL (RIPRAP' OpI 648.000 6450.642 238.913 2296.149 o E- 36 18 MIN. DEPTH 650.000 12154.867 50.180 3438.624 /UNDERLYING FiFQ = 10 Cfs 652.000 210372.193 754.526 1' 4808.847 2 654.000 31557.732 1168.805 6414.598 ~ 656.000 46182.209 710.452 8247.787 APRON LENGTH = 15' i CONCENTRIC TRASH RACK AND ANTI VORTEX DEVICE PARAMETERS EVENT; V1 0 c m c a D I n f/I RISER DIA.=60" CYLINDER DIAKN CYLINDER THICKNEE SS=16 GA. ANTI- VORTEX DEVICE DESIGN CYLINDER HEIGHT=29" MIN. SUPPORT BAR=1.50" PIPE OR 1.50"x1.50"xO.25"ANGLE RISER TOP THICKNESS=12 GA. ") 8 GA. (F) PRESSHOLESUR�RELIEF2DIA. A `' A RISER DIAMETER SECTION A -A ISOMETRIC ASSUMED PHREATIC LINE 4H:1V - ANTI -SEEP COLLARS -ANTI-SEEP COLLARS 0 5.0'X5.0' (SEE DETAIL) RCP BARREL (SEE DETAIL) CUT OFF TRENCH EXCAVATED INTO SUITABLE MATERIAL WHERE APPLICABLE -TBD BY GEOTECH ft 652.00 TOP STIFFENER (IF REQUIRED) IS -X -X -ANGLE WELDED 3.33 1 422.31 �. e . et TO TOP ANDS ORIENTED PER - Circlular € 16.51 8.00 O O PENDICULAR TO CORRUGATIONS. SUPPORT ANGLES 2 WCM 10 -YR 29.27 I UPPER ANCHOR TABS 650.96 596 O O TOP IS -GAGE CORRUGATED 651.22 636 O O •,0ffi �W >O METAL OR 1,/8" STEEL PLATE. O � Z V1 O > w2 PRESSURE RELIEF HOLES MAY q 61 ®LU BE OMMITTED, IF ENDS OF N W, L 0 r 0) , 04`- O T � `.✓ C CORRUGATIONS ARE LEFT FULLY °C OU, WELDED ATTACHMENT PLAN VIEW w un EN THE TOP IS o LU �- Z i AOPEN TTACHED. 0 12" LOWER ANCHOR TABS TACKWELD �l CYLINDER IS. GAGE CORRUGATED ALL AROUND N METAL PIPE OR FABRICATED FROM 1.5"X1.5"X7.5' STEEL ANGLE 1/890 2 0 90- APART(NOTCH 1 0 CENTER & H STEEL PLATE. BOLT TOGETHER W/GALVANIZED 3/8"X3/4" BOLTS) NOTES: ° a 8" MIN. 1. THE CYLINDER MUST BE 18" LOWER ANCHOR TABS °.. ,'P,° BOLT TO RCP RISER ' FIRMLY FASTENED TO THE �4) 1.5"X1.5'7(8" ANGLE v ? " e ° c TOP OF THE RISER. (4) 3/8 X2" GALVANIZED BOLTS G ° G a. (8) 3/8" WASHERS 6 X 12" ° SUPPORT BAR SIZE 2. SUPPORT BARS ARE WELDED SPACER BAR ° ° (#6 REBAR MIN.) ' n , ° '' : °�' •; TO THE TOP OF THE RISER (TYPICAL) • a. °• . .'. '. OR ATTACHED BY STRAPS ° . a ° . °. BOLTED TO TOP OF RISER. RISER DIAMETER SECTION A -A ISOMETRIC ASSUMED PHREATIC LINE 4H:1V - ANTI -SEEP COLLARS -ANTI-SEEP COLLARS 0 5.0'X5.0' (SEE DETAIL) RCP BARREL (SEE DETAIL) CUT OFF TRENCH EXCAVATED INTO SUITABLE MATERIAL WHERE APPLICABLE -TBD BY GEOTECH Trapezoidal 3.00 25.00 ft 652.00 ft 3.33 1 422.31 �. e . et ft/S Circlular € 16.51 8.00 in 64.3..00 ft 0.60 2 WCM 10 -YR 29.27 I 26.03 650.96 596 25 -YR ! 38.11 41.70 651.22 636 z© Q� L.+ •,0ffi �W >O rr�� O � Z V1 > w2 q 61 ®LU JCc 2 N W, L 0 r 0) , 04`- O T � `.✓ C W °C OU, LL 0 ' w un Q. W o LU �- Z i o' 0 �l W N Trapezoidal 3.00 25.00 ft 652.00 ft 3.33 1 422.31 cfs 6.54 ft/S Circlular € 16.51 8.00 in 64.3..00 ft 0.60 2 WCM 654..00 ft ROUTED (CFS) 640..00 ft 10.91735 cfS 15.72 ft/S € 16.51 OUTLET PROTECTION (SEE DETAIL) EVENT INFLOW CFS ROUTED (CFS) ELEVATION " STORAGE(CUBIC YD) 1 a f 2 -YR € 16.51 8.04 649.06 351 1 WCM 10 -YR 29.27 I 26.03 650.96 596 25 -YR ! 38.11 41.70 651.22 636 SEDIMENT BASIN S CHEMA TI C ELE VA. TIONS CREST OF EMERGENCY SPILLWAY DESIGN HIGH WATER (25 -YR. STORM ELEV.) MIN. 1.0' 1 0.5' MIN. 1.0' RISER CREST 67C.Y./ AC.'' DEWATERING " DRY " STORAGE DEVICE " 67C.Y./ AC. W STORAGE 1_,,.r..•.''+.£.'.�.t..n:.5a�.','g::: iz�u:ce?Rd'ri$ ...::.:.::.. SEDIMENT CLEANOUT POINT T. I DESIGN ELEVATIONS WITH EMERGENCY SPILLWAY SOURCE: VA. DSWC PLATE. 3.14-2 PLATE. 3.29-4 EACH LIFT OF THE FILL IS COMPACTED, BUT THE OUTER FACE OF THE SLOPE IS ALLOWED TO REMAIN LOOSE SO THAT THE ROCKS, CLODS, ETC. REACH THE NATURAL ANGLE OF REPOSE. FILL SLOPE TREA TMENT SOURCE: VA. DSWC PLATE. 3.29-3 STAIR STEPPING CUT SLOPES DEBRIS FROM SLOPE ABOVE IS CAUGHT -_ - BY STEPS DRAINAGE I (IIIA 40"-50" WATER, SOIL AND FERTILIZER ARE HELD BY STEPS - PLANTS CAN BECOME ESTABLISHED ON THE STEPS. SOURCE: VA. DSWC PLATE 3.29-1 GR 0 O VING SL OPE S GROOVING IS CUTTING FURROWS ALONG THE CONTOUR OF A SLOPE. IRREGULARITIES IN THE SOIL SURFACE CATCH RAINWATER AND PROVIDE SOME COVERAGE OF LIME, FERTILIZER AND SEED. SOURCE: VA. DSWC PLATE 3.29-2 SOURCE: VA. DSWC OF PLATE. 3.14-4 p I`J, Jimmy L. Taggart Lic. No. 22841 �i� o'41�IqI % ONAL m REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE JANUARY 28, 2018 SCALE AS SHOWN CONTOUR INTERVAL N/A U C a f R WCM CO �m J C. 0 i • z© Q� L.+ •,0ffi �W >O rr�� O � Z V1 > w2 q 61 ®LU JCc 2 N W, L 0 r 0) , 04`- O T � `.✓ C W °C OU, LL 0 ' w un Q. W o LU �- Z i o' 0 W REVISIONS COUNTY COMMENTS MARCH 5, 2018 DATE JANUARY 28, 2018 SCALE AS SHOWN CONTOUR INTERVAL N/A FILE NUMBER 8058 SHEET 6of6 f R i • •,0ffi , t f �1 f i FILE NUMBER 8058 SHEET 6of6