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HomeMy WebLinkAboutWPO200700097 Plan - Stormwater Erosion Control Plan 2007-06-22as fe - 200 - EXISTING CUL VERT CUL VERT DROP INLET & STRUCTURE NO. CURB CURB & GU TIER PROPOSED PA VEMENT EC-3A DITCH DEPTH OF EC--3A DITCH EC-2 DITCH DEPTH OF EC---2 DITCH EAR PH D1 TCH DRI VEWA Y CUL VERT BENCH MARK CLEARING LIMITS VDOT STANDARD STOP SIGN EXISTING CONTOUR PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVATION ��--- TBC DENOTES TOPIBACK OF CURB TAB DENOTES TOP OF BOX -EROSION• '"" OL SYUBOL HANDBOOKO �IIRGINIA EROSION & SEDIMEN ! , BAIL BARRIER 3.04 INLET PROTECTION SILT FENCE PERMANENT SEEDING DUST CONTROL SAFETY FENCE DI VERSION �3�1������`1�7►�J 3.14 3.07 3.05 3.02 3.20 3.10 S12 J. 32 J. 3O 3.08 3.39 3.15 3.01 311 J.38 APPRO-XIMATE MATERIAL Aft/ANTITIES AS SHOWN ARE APPROXIMATE ONLY CONTRACTOR GENERAL NOTES 1. OWNER \DEVELOPER: OLD TRAIL CREEKSIDE, L.L.C. BEIGHTS DEVELOPMENT CORPORATION 800 E. JEFFERSON STREET CHARLOTTESVILLE, VIRGINIA 22902 TELEPHONE. (434) 245-0100 FAX. (434) 245-0300 CONTACT: MR. GA YLON BEIGHTS 2. ENGINEER. COLLINS ENGINEERING, LLC 800: E JEFFERSON STREET CHARLOTTESVILLE, VIRGINIA 22902 TELEPHONE: (434) 987-1631 E-MAIL: scott@collins-engineering, cam CONTACT- MR. SCOTT COLLINS, P.E. J. TAX MAP NO: PORTION OF TAX MAP NO: 05500-00--00-78 05500-00-00-074A TAX MAP 55, PARCEL 78 TAX MAP 55, PARCEL 74A OLD TRAIL CREEKSIDE, L.L.C. OLD TRAIL CREEKSIDE, L.L.C. 800 E. JEFFERSON STREET 800 E. JEFFERSON STREET CHARLOTTE`SOLLE, VIRGINIA 22902 CHARLOTTESVILLE, VIRGINIA 22902 GPIN NO.: 420470912234 GPIN NO.: 420470912234 ZONING. R--1 RESIDENTIAL ZONING. R-1 RESIDENTIAL D.B. 2764, PG. 271 D.B. 2906, PG. 711 PORTION OF TAX MAP NO: 05500-00--00-07500 TAX MAP 55, PARCEL 75 OLD TRAIL CREEKSIDE, L.L.C. 800 E. JEFFERSON STREET CHARLOTTESVILLE, K?GINIA .22902 GPIN NO.: 420824911756 ZONING: R--1 RESIDEN77AL D.B. 2764, PG. 271 4. ZONING. R-1 RESIDENTIAL, BONUS LEVEL (CLUSTER DEVELOPMENT) 5. USE: LOW DENSITY RESIDENTIAL 6. NUMBER C?F LOTS/UNITS: 61 7 ZONING: R-1 BONUS LEVEL, CLUSTER DEVELOPMENT AS FOLLOWED: * CLKISTER DEVELOPMENT IS BEING ACHIEVED BY 25y OPEN SPACE WITHIN THE PROJECT LIMITS • A :51w. DENSITY INCREASE IS BEING ACHIEVED BY PLANTING STREET TREES. • A 109. DENSITY INCREASE IS BEING ACHIEVED BY SERVING ALL LOTS WITH AN INTERNAL ROAD SYSTEM. * A 159 DENSITY INCREASE IS BEING ACHIEVED BY DEDICATING OVER 257. OF` THE PROPERTY FOR PUBLIC USE. GROSS DENSITY ALLOWED: 0.97 D.U./AREA. GROSS DENSITY ALLOWED FROM BONUS FACTORS AND CLUSTERS: 307. INCREASE IN DENSITY (1.30xO. 97). TOTAL GROSS DENSITY ALLOWED: 1.26 D A. GROSS TOTAL DWELLING UNITS ALLOWED. 60.6 OR 61 UNITS. TOTAL DWELL!^IG UNITS PROVIDED. 61 UNITS_. 8. ACREAGE (TOTAL): f48.09 AC ROADS. 4.66 AC LOTS, ° 25.32 AC (INCLUDES STREAM BUFFER AND PRESERVATION AREA WITHIN LOTS) COMMON/ OPENSPAC Ea• 13:59 AC (2& 62r - INCLUDING STREAM BUFFERS) STREAM BUFFER AREA: 5.96 AC (INCLUDED IN LOTS AND OPEN .SPACE AREA) STRUCTURE SETBACKS & HEIGHTS: MINIMUM FRONT YARD DEPTH. 25' MINIMUM SIDE YARD: 15' MINIMUM REAR YARD. 20' MAXIMUM STRUCTURE HEIGHT 35' 9. UTILITIES. S MEF; -- ALBEMARLE COUNTY - AVAILABLE ON THE SITE E ,°A T£F't.- ALBEMARLE COUNTY - AVAILABLE ON THE SITE WATER )YODEL AND CALCULATIONS PROVIDED WITH THE SUBMITTAL OF THE PRELIMINARY PLAT: THE MODEL IS BASED ON FLOWS AND INFORMATION PROVIDED FROM ALBEMARLE. COUNTY' SERVICE ",UTHORITY 10. SUBDIWSIION STR _.. ,".3 CURB & GUTTER (PUBLIC ROADS) 11. DRAINAGE D1STRIC1 LICKINGHOLE DRAINAGE BASIN 12. WATERSHED: D: - . RI V�- JVNA RESERVOIR 13. DRAINAGE THIS SITE WILL CONTRIBUTE TO A REGIONAL STORMWATER BASIN. COMPLIANCE WILL BE ACHIEVED THROUGH A PRO-RATA SHARE CONTRIBUTION BASED ON THE INCREASE IN VOLUME: AND VELOCITY OF THE STORMWA TER. BIO-RETENTION AREAS MAY BE UTILIZED ONSI7F TOs HELP ACHIEVE WATER QUALITY COMPLIANCE 14. TOPO & SURVEY. ° TOPOGRAPHY PROVIDED TIMMONS GROUP, SEPT 2004. 15. CONTRACTOR SHALL VERIFY LOCATION AND ELEVATION OF ALL UNDERGROUND UTILITIES SHOWN ON THE IN AREAS OF CONSTRUCTION PRIOR TO STARTING WORK. CONTACT ENGINEER IMMEDIA TEL Y IF LOCH TION OR ELEVA TION /S DIFFERENT FROM THA T SHOWN ON PLANS, IF THERE APPEARS TO BE A CONFLICT AND UPON DISCOVERY OF ANY UTILITY NOT SHOWN O/V THE PLANS. 16. COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK, SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND REGULATIONS COLLINS ENGINEERPNG SHALL NOT ASSUME RESPONSIBILITY FOR ANY CONSTRUCTION BEGUN PRIOR TO PLAN APPROVAL. EROSION & SEDIMENTATIONT EASU E STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND .SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OFF THE FOLLOWING,: 1. CONSTRUCJTJON ENTRANCE, ALBEMARLE' COUNTY DETAIL - ENTRANCE TO BE LOCATED TO PREVENT TRACKING OF MUD ONTO EXISTING OLD TRAIL DRIVE AND WELBOURNE LANE. 2. SIL T FENCE, STANDARD AND SPECIFICA TIONS 3.05 - SIL T FENCE TO BE PLACED WHERE SHOWN ON THE PLANS OR AS FIELD CONDITIONS WARRANT, 3. TEMPORAR'Y DI VERSION DIKE, STANDARD AND SPECIFICA TION 3.09 - TEMPORARY DI VERSION DITCHES TO BE CONSTRUCTED WHERE SHOWN ON PLANS 4. INLET PROTECTION STANDARD AND SPECIFICATIONS 3.07 - INLET PROTECTION TO BE PLACED WHERE SHOWN ON THE PLANS OR AS FIELD CONDITIONS WARRANT. 5. CUL VERT INLET PROTECTION STANDARD AND SPECIFICA TIONS 3.08 - CUL VERT INLET PROTECTION TO BE PLACED) WHERE SHOWN ON THE PLANS OR AS FIELD CONDITIONS WARRANT 6. TEMPORAR'Y SEDIMENT TRAP, STANDARD AND SPECIFICATION 3.13 - TEMPORARY SEDIMENT TRAPS ARE TO BE LOCATED AS SHOWN ON THE PLANS (4 TRAPS TOTAL). 7 OUTLET PROTECTION STANDARD AND SPECIFICATION 3.18 - OUTLET PROTECTION TO BE PLACED AS SHOWN ON' THE PLANS. 8. ROCK CHECK DAMS; STANDARD AND SPECIFICATION 3.20 - ROCK CHECK DAMS ARE TO BE PLACED IN OUTFALL D1/TCHES AS SHOWN ON THE PLANS. ALBEMARLECOUNTY NOTES FOR EROSION T .L ES-1: UNLESS 0THERWISE 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 CONFEREAVCE, 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 CLEARIING. ES-4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL AIMES ES-5. PRIOR TO, COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDINIG 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 APPROVINIG AUTHORITY, ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORI T`Y ES-7- ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8: DURING DIEWATERING 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 IMMEDIA TEL Y EROSION CONTROL NOTES & NARRATIVE PURPOSE.° THE PURPOSE OF THE LAND DISTURBING ACTIVITY IS TO CREATE A SINGLE-FAMIL Y SUBDIVISION WTH ACCESS TO OLD TRAIL DRIVE THROUGH WELBOURNE LANE AND MOUNT VISTA LANE, WHICH WERE CONSTRUCTED AS PART OF CREEKSIDE PHASE I AND ll. THE AVERAGE SIZE FOR EACH LOT IN THE SUBDIVISION IS 1/2-ACRE THESE LOTS ARE ACCESSED FROM PUBLIC ROADS STORM SEWER WILL DIVERT RUN-OFF TO 2 BIO-RETENTION AREAS LOCATED WI THIN THE LIMITS OF THE PROJECT. THIS PROJECT WILL CONTAIN APPROXIMA TEL Y 28.9 ACRES OF LAND DISTURBANCE EXISTING SITE CONDITIONS: CURRENTLY, THE MAJORITY OF THE SITE IS COVERED BY TALL GRASSES WITH A WOODED AREA ALONG THE SOUTHERN BOUNDARY. THERE IS A CREEK WITHIN THE PROJECT LIMITS AND THE SITE DRAINS TO LICKINGHOLE CREEK FROM OVERLAND FLOW AND THE ONSITE CREEK. THE CREEK AND LICKINGHOLE CREEK SERVE AS AN OUTFALL FOR THE DRAINAGE FROM THE PROPERTY. THE LICKINGHOLE CREEK, 100- YR FLOOD PLAIN EXTENDS THROUGH THE LOW LYING LAND AREAS ON THE SITE. THE TOPOGRAPHIC ELEVATION DIFFERENCE ACROSS THE PROPERTY IS APPROXIMATELY 70' OF GRADE DIFFERENTIAL. ADS LAICENT AREAS: THIS SITE IS BORDERED BY RESIDENTIAL PROPERTY TO THE NORTH, LICKINGHOLE CREEK TO THE SOUTH, THE PROPOSED CREEKSIDE PHASE I AND 11 PROJECT TO THE EAST, AND RESIDENTIAL PROPERTIES TO THE WEST THE RESIDENTIAL TRACTS TO THE NORTH AND WEST ARE UPSTREAM OF THIS PROJECT THEREFORE, DEVELOPMENT OF THIS SITE WILL HAVE NO EFFECT ON THESE TRACTS. LAND DISTURBANCE FROM THE THIS SITE WILL AFFECT THE PRPPERTY OF THE ARTHUR SHIFFLETT ESTATE. THE DISTURBANCE WILL BE LIMITED TO THE AREA NEAR JARMANS GAP ROAD. AN OFF -SITE GRADING EASEMENT WILL BE ATTAINED BEFORE . CONSTRUCTION BEGINS LICKINGHOLE CREEK MAY BE AFFECTED THE MOST BY THE DEVELOPMENT EROSION CONTROL MEASURES SUCH AS SEDIMENT TRAPS, SILT FENCE WITH ROCK WIERS, AND DIVERSION DIKES SHALL BE UTILIZED TO CONTAIN THE LAND DISTURBANCE ACTIVITY AND PROTECT LICKINGHOLE CREEK. OFFS! TE LAND DISTURBANCE AS PART OF THE CONSTRUCTION OF THE STORM SEWER AND PROPOSED ROADWAYS, THERE WILL BE SOME OFFSITE GRADING ALONG JARMANS GAP ROAD. THIS INCLUDES A CONNECTION TO THE EXISTING CULVERT THAT CARRIES RUNOFF FROM THE RESIDENTIAL PROPERTIES TO THE NORTH. AS WELL AS ADDING A CULVERT FOR THE EXISTING D116H THAT PASSES UNDER THE INTERSECTION OF THE PROPOSED MILLSTONE LANE AND JARMANS GAP ROAD. CRI77CAL AREAS.° THE MAJORITY OF LAND DISTURBANCE ACTI VI TIES WITHIN THIS PROJECT ARE ASSOCIATED WITH ROAD CONSTRUCTION AND LOT GRADING FOR THE SUBDIVISION. MINIMAL DISTURBANCE OF CRITICAL SLOPES IS PROPOSED WITHIN THE PROJECT LIMITS, CONSIDERING THE MAJORITY OF CRITICAL SLOPES ARE LOCATED ALONG LICKINGHOLE CREEK WITHIN THE 100-FT STREAM BUFFER. CUT AND FILL SECTIONS ARE CREATED ALONG SOME OF THE LOTS AND BACK OF LOTS. SPECIAL AT7ENTi'ON SHALL BE GIVEN TO THESE AREAS. EROSION CONTROL MATS MAY NEED TO BE INSTALLED IN CERTAIN AREAS TO REDUCE EROSION OF STEEP SLOPES WHILE VEGETATTION IS BEING ESTABLISHED. IN ADDITION, SPECIAL. ATTENTION SHALL BE GIVEN TO THE FLOOD PLAIN. AREA AND STREAM BUFFERS WITHIN THE PROJECT LIMITS NO CONSTRUCTION ACTIVITY SHALL OCCUR WITHIN THESE AREAS, WITH THE EXCEPTION OF UTILITY INSTALLATION. EROSION CONTROL MEASURES SHALL BE USED DURING UTILITY INSTALLATION TO PROTECT SURROUNDING AREAS EXISTING TREES WITHIN THE PROPOSED PRESER VA TION AREAS SHALL BE PROTECTED AS SPECIFIED IN THE CONSTRUCTION PLANS. SPECIAL ATTENTION SHALL BE GIVEN TO PREVENT DISTURBANCE TO THE AREAS PROPOSED TO BE PRESERVED. SMUENCE OF CONSTRUCTION: 1. CONTRACTOR SHALL_ NOTIFY ABLEMARLE COUNTY ENGINEERING AND PUBLIC WORKS DEPARTMENT TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED. 2. FLAG THE CLEARING LIMITS AND WOODED AREA THAT IS TO REMAIN, PAYING SPECIAL ATTENTION TO THE TREE PRESERVATION AREAS J. EROSION CONTROL ,MEASURES SHALL NOT BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT, 4. INSTALL THE CONSTRUCTION ENTRANCES CONNECTING TO WELBOURNE LANE AND MOUNT VISTA LANE AS SHOWN ON THE PLANS. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO PAVED SURFACES WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED TH R TH END OF EACH DA Y SE J EN T SHALL D OUGHL Y A T E D M BE REMOVED FROM THE ROADS BY :SWEEPING AND SHOVELING, AND PLACED WITHIN A CONTROLLED DISPOSAL AREA. STREET TRAFFIC SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO I)ND1 VIDUAL SUBDIVISION LOTS AS WELL AS TO LARGER LAND DISTURBING ACTI VI TIES ADEQUATE WATER IS AVAILABLE AND PAVED WASH RACKS ARE REQUIRED WHERE CONSTRUCTION TRAFFIC ENTERS PAVED OR PUBILIC ROADS 5. INS7IALL THE INITIAL CONSTRUCTION MEASURES ON THE EASTERN SIDE OF THE EXISTING CREEK AS SHOWN ON 'THE PHASE I EROSION CONTROL SHEET SEDIMENT BASINS, CHECK DAMS, PERIMETER DIVERSION DIKES, SEDIMMENT BARRIERfi AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND DISTURBANCE ACTIVITIES AND SHALL BE MADE FUNCTIONAL BEFORE UP SLOPE LAND DISTURBANCE TAKES PLACE. CONTRACTOR TO STAY WI THIN THE LIMITS OF LAND DISTURBANCE AT ALL TIMES. ENSUR7 POSITIVE DRAINAGE ALONG ANY MEASURES INTENDED TO DIVERT WATER. 6. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES, SUCH AS DIKES, TRAPS AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. Z INSTALL CULVERT AAA-74B TO ACT AS A PERMANENT STREAM CROSSING AND TO HAVE ACCESS TO WESTERN SIDE OF TEE PROJECT AREA. VIRGINIA STATE LAW REQUIRES THAT THIS WORK MUST BE PERFORMED IN DRY �°ONDITIONS. EXISTING STREAM TO BE DIVERTED DURING INSTALLATION OF PEEMANENT CULVERT AT ROAD CROSSING. SEE DETAIL SHEET 9. INSTALL (2) TEMPORARY 36" RCP PIPE 20' LONG FOR TEMPORARY PIPES & VEHICLE ACCESS FOR STREAM DIVERSION. 8 INSTALL DIVERSION DIKE TO DIRECT WATER TO THE EXISTING POND. THIS POND IS CURRENTLY HOLDING WATER FOR THE EXISTING DRAINAGE AREA LOCATED NORTH OF JARMANS GAP ROAD AND THE SIZE OF THE DRAINAGE AREA Wlil NOT CHANGE WITH THIS CONSTRUCTION PROJECT THE POND WILL BE MUCKED OUT TO RESTORE ITS CURRENT DEPTH AT THE END OF THE PROJECT CONSTRUCTION. 9. INSTALL THE REMAINDER OF THE INITIAL CONSTRUCTION MEASURES ON THE WESTERN SIDE OF THE CREEKS AS :SHOWN ON THE PHASE I EROSION CONTROL SHEET, 10. CONNSTRUCTION OF THE STORM RUNS 125- l31 SHALL NOW TAKE PLACE SO THAT THE THIRD CONSTRUCTION ENTRANCE L OCA TED AT JARMANS GAP ROAD CAN BE MADE OPERATIONAL. 11. INSTALL SILT FENCE AS SHOWN ON THE PHASE ll EROSION CONTROL SHEET: 12. INSTALLATION OF THE UTILITIES CAN NOW TAKE PLACE. 13. BEGIIN PHASE // BY ROUGH GRADING THE ROADS, WITH 2Z 1 SIDE SLOPES BACK TO NATURAL GROUND BETWEEN THE ROADWAYS AND SEDIMENT TRAPS TO ALLOW THE PHASE I SEDIMENT TRAPS TO REMAIN ACTIN£ AND FUNCTIONAL. 14. INSTALL THE STORM SEWER PIPES SHOWN ON PHASE /L ALL EROSION CONTROL MEASURES FROM PHASE I SHALLL REMAIN IN PLACE AND OPERATIONAL FOR PHASE ll WHERE APPLICABLE. INSTALL INLET PROTECTION FOR ALL STRUCTURES INSTALLED DURING PHASE/1. 15. FINE" GRADE, INSTALL THE REMAINING STORM SEWER AND REMAINING UTILITIES, INSTALL CURB & GUTTER AND, SIDEWALK, SEED, AND FERTILIZE THE DENUDED AREAS 16, 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 SHAY BE APPLIED WITHIN SEVEN DA YS TO DENUDED AREAS THA T MA Y NOT BE A T FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 17. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, REMOVE 'THE REMAINING EROSION CONTROL MEASURES. SEDIMENT BASINS p & #2 SHALL BE CONVERTED T(7 BIO-RETENTION AREAS. SEE DETAILS ON THE TRANSFORMATION AND CONSTRUCTION OF THE B/O-RETENTION FEATURE 18. THE EXISTING POND WILL BE RETURNED TO ITS ORIGINAL DEPTH BY REMOVING THE ACCUMULATED SEDIMENT GENERATED BY THIS PROJECT. 19, ALL SEDIMENT REMOVED FROM THE POND AND SEDIMET BASINS WILL BE STORED/DEPOSITED IN SUCH A MANIOR AS TO ENSURE THE AREAS ARE STABLILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES 20. MAIA47AIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY' THE COUNTY ENGINEER IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 21. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 3O DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERAWANENTL Y STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. EERAMAhUENT STABIL/7_ RON: AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE SITE WILL BE LIMED, FERTILIZED, SEEDED, AND MUILC14ED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF THE FOLLOWING; TOPSOIL - 2" DEPTH LIME - .2 TONS/ACRE FERTILIZER - 600 LBS/ACRE OF 15-30-15 SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX-114 (45 LBS%ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE PARK KENTUCKY BLUEGRASS, 15 LBS/ACRRE ANNUAL RYEGRASS & 15 LBS%ACRE PLEASURE PERENNIAL RYEGRASS) OR ACCEPTABLE ALTERNATE. AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND MAINTAINED ON A REGULAR BASIS MULCH- STRAW OR HAY 1.5 TO 2 TONS/ACRE MAIN TENANCE° IN GENEIRAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED ,IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. CONT .. C. ALL SUIT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. S TORSI OVA TER RUN-OFF CON,'SIDERA 71ONS° THE CONSTRUCTION OF THIS PROJECT SHALL HAVE MINIMAL EFFECT IN PEAK RUN ---OFF RATES ON LICKINGHOLE CREEK BECAUSE THE SITE IS SELF-CONTAINED AND IS OUTFALLED FIRST TO A BIO-RETENTION AREA. THE IMPERIOUS AREA IS BEING INCREASED DUE TO THE CONSTRUCTION OF THE ROAD AND HOUSES, HOWEVER, THE Bl0-RETENTION AREA WILL HELP CONTAIN THE FIRST FLUSH WHICH WILL HELP PREVENT EROSION DOWNSTREAM. THE S TORMWA TER WILL FILTER AND DRAIN FROM THE BIO-RE TENTION AREA TO LICKINGHOLE CREEK, AT A REDUCED VELOCITY. IN ADDITION, A CONTRIBUTION TD THE PRO-RATA ,SHARE PROGRAM SHALL BE MADE TO COMPENSATE FOR THE RUN-OFF, SINCE THE RUNOFF FROM THE PROPERTY DRAINS TO THE REGIONAL POND. EROSIONT ..L NOTES I. CONSTRUCTION INSPECTION OF ALL PROPOSED ROADS WILL BE MADE BY THE COUNTY THE CONTRACTOR MUST CONTACT 7HE DEPARTMENT OF ENGINEERING ( 296-5832) 48 HOURS IN ADVANCE OF THE START OF CONSTRUCTION. 2. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SI TE. J. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN THIRTY (30) DAYS 4. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCK PILES SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES 5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIA TEL Y AFTER INSTALLA TION. 6. EROSION AND SEDIMENT CONTROL DEVICES SHALL BE CONSTRUCTED AND INSTALLED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 7. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PEP1,11ANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT, IN THE OPINION OF THE COUNTY ENGINEER OR HIS DESIGNATED AGENT, IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. 8. 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) EXCA VA TED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES C) EFFLUENT FROM DEWA TERING OPERATIONS SHALL BE FILTERED OR MASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR 0.7-SITE PROPERTY. D) RESTABILIZA TION SHALL BE IN ACCORDANCE WITH THE ABOVE NOTES ,9. ALL APPLICABLE FEDERAL, STATE, AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING A LIVE WATERCOURSE SHALL BE MET. liO. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY TRACKING ONTO TIES PA VED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A DISPOSAL AREA. 11. IT SHALL BE THE OWNER'S RESPONSIBILITY TO INSPECT EROSION CONTROL DEVICES PERIODICALLY AND AFTER EVERY ERODIBLE RAINFALL. ANY NECESSARY REPAIRS OR CLEAN UP TO ilw'AINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL_ BE MADE IMMEDIA TEL Y 12. ADDITIONAL EROSION CONTROL DEVICES MAY BE REQUIRED BY THE COUNTY ENGINEER OR HIS DESIGNATED AGENT IF DEEMED NECESSARY. 1.3 ALL EROSION CONTROL DEVICES SHALL BE IN PLACE AND FUNCTIONAL AT ALL TIMES AND IF REMOI ED FOR CONSTRUCTION PROGRESS, SHALL BE REPLACED BY THE CLOSE OF EA CH WORKDA Y 14. FINAL REMOVAL GI` EROSION CONTROL DEVICES SHALL NOT OCCUR UNTIL THE COUNTY ENGINEER OR HIS DESIGNATED AGENT DEEMS THE SITE STABILIZED. 15. ALL ENTRANCES E,! FPT FOR THE APPROVED CONSTRUCTION ENTRANCE' SHALL BE BLOCKED IN SUCH A MANNER AS TO NOT ALLOW ACCESS TO THE SITE. 16. TEMPORARY CONS ':'?UCTION ENTRANCE IS REQUIRED FOR THIS SITE. ADEQUATE WATER i:S AVAILABLE AND PAVED WASH RACKS ARE REQUIRED WHERE CONSTRUCTION Tie',` ° FIC L-NTERS PAVED OR PUBLIC ROADS. 17 THE DEVELOPER SMALL. RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE AND/OR CONVERT TO PERMANENT STRUCTURE ALL EROSION AND SEDIMENT CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT 183. SHOULD TEMPORARY SEDIMENT STRUCTURES BE CONVERTED TO PERMANENT STORMIAIATER MAM,-IGEMENT STRUCTURES THEN THE FOLLOWING SHALL OCCUR. - A) THE DAM SHALL BE DESIGNED AND CONSTRUCTED PER VIRGINIA DAM SAFETY REQUIREMENTS AND SHALL HAVE A CORE PER COUNTY OF ALBEMARLE ENGINEERING POLICY B) THE RISER AND BARREL PIPES SHALL BE RCP. C) THE SLOPE OF DAM SHALL BE J. 1 OR FLATTER. D) THE OUTLET PROTECTION SHALL BE DESIGNED AS EITHER VDOT EC-1 OR VESCH STD. & SPEC. 3.18 OUTLET PROTECTION TAIL WA TER DESIGN. E.) A GEOTECHNICAL ENGINEERING STUDY SHALL CONSIST OF 1) A SITE INVESTIGATION, 2) LABORATORY TESTING AND 3) AN ENGINEERING ANALYSIS. SOIL DESCRIPTIONS 7B - BRADDOCK LOAM - 01. TO 77 SLOPES THIS SOIL IS DEEP, GENTLY .SLOPING, AND WELL DRAINED. IT IS ON NARROW TO BROAD CONVEX RIDGETOPS AREAS j OF THIS SOIL ARE 100 TO 500 FEET WIDE AND ARE ELONGATED ALONG THE i RIDGE OR ARE HIGH VARIABLE IN SHAPE THEY RANGE FROM ABOUT 10 TO 25 ACRES. THE SURFACE LAYER OF THIS SOIL IS BROWN LOAM ABOUT 8 INCHES THIGH,: PERMEABILITY AND AVAILABLE WATER CAPACITY ARE MODERA TE SURFACE RUNOFF IS MEDIUM. THE HAZARD OF EROSION IS MODERATE AND THE SOIL HAS FAIR TIL TH. 8C3 - BRADDOCK CI_A Y LOAM -- 7.V TD 15 X SLOPES. THIS DEEP, STRONGL Y i SLOPING, WELL DRAINED SOIL IS ON NARROW CONVEX RIDGETOPS ANT MEDIUM TO SHORT SIDE SLOPES AREAS OF THIS SOIL ARE 100 TO 400 FEET WIDE AND ARE IRREGULARLY ELONGATED ALONG THE RIDGE THE RANGE FROM ABOUT 10 TO 20 ACRES THE SURFACE LAYER OF THIS SOIL IS YELLOWISH RED CLAY LOAM ABOUT 4 INCHES THICK. PERMEABILITY AND AVAILABLE WATER CAPACITY ARE MODERATE SURFACE RUNOFF IS RAPID. THE HAZARD OF EROSION IS SEVERE AND PAST EROSION HAS REDUCED THE RANGE OF MOISTURE CONTENT FOR GOOD WORKABILITY 17 - CRAIGSV9LLE LOAM - 07o TO 29' SLOPES, THIS SOIL IS DEEP, NEARLY LEVEL, WELL DRAINED ON FLOOD PLAINS AND FIRST BOTTOMS. THEY RANGE FROM 5 TO ABOUT 100 ACRES THE SURFACE LAYER IS BROWN LOAM ABOUT 8 INCHES THICK. PERMEABILITY IS MODERA TEL Y RAPID OR RAPID, AND A VAILABLE WA TER CAPACITY IS ,VERY LOW OR LOW. 3'6C - HA YESVILLE LOAM -. 77 TO 151W. SLOPES THIS SOIL IS DEEP, WELL DRAINED, AND STRONGLY SLOPING. IT IS ON NARROW CONVEX RIDGETOPS AND SIDE SLOPES. SLOPES ARE -SMOOTH AND ABOUT 200 TO 600 ,FEET LONG AREAS OF THIS SOIL ARE LONG AND WINDING. THEY RANGE FROM 5 TO ABOUT 50 ACRES. THE SURFACE LAYER OF THIS SOIL IS BROWN AND STRONG BROWN LOAM ABOUT 7 INCHES THICK PERMEABILITY AND AVAILABLE WATER CAPACITY ARE MODERATE. SURFACE RUNOFF IS RAPID. TIME HAZARD OF EROSION IS SEVERE � THE SOIL HAS GOOD TIL TH. 6i6D - PARKER VERY .STONY LOAM - 150. TO 257 SLOPES, THIS SOIL IS DEEP, MODERA TEL Y STEEP, EXCESSIVELY DRAINED AND IS ON SIDE SLOPES OF MOUNTAINS STONES, 3 TO 10 FEET APART COVER Jr. TO 15,' OF THE SURFACE SLOPES ARE SMOOTH AND ABOUT 400 TO 1000 FEET LONG THEY RANGE FROM 10 TO ABOUT 60 ACRES TYPICALLY, THE SURFACE LAYER IS � DARK BROWN TO BROWNISH YELLOW VERY STONY LOAM ABOUT 14 INCHES THICK. PERMEABILITY IS MODERA TEL Y RAPID, AND AVAILABLE WA TER CAPACITY IS LOW. RUNOFF IS RAPID. 87B - THURMOND LOAM - 29 TO 7r .SLOPES THIS DEEP, GENTLY SLOPING, WELL DRAINED SOIL IS ON ELONGATED RIDGES. SLOPES ARE .SMOOTH AND ABOUT 200 j TO 400 FEET LONG. AREAS OF THIS SOIL COMMONLY ARE LONG AND WINDING. 1 THEY RANGE FROM 5 TO ABOUT 50 ACRES PERMEABILITY IS MODERATE, AND AVAILABLE WATER CAPACITY IS HIGH. SURFACE RUNOFF IS MEDIUM. THE j HAZARD OF EROSION IS MODERATE THIS SOIL HAS GOOD TIL TH. ra TT R. COLLINS� No. 35791 NV � a ,s w t�- �C) �� � r4 to DATE 0 a w a 3' 213106 U-L w DRAWN BY u., C00 DESIGNED BY I `47 DRAINAGE TOTAiL VOLUME WET DRY TOTAL OUTLET WIDTH OF VIET VOLUME DRY VOLUME AREA REQUIRED ELEMPON EMPON DEPTH LENGTH BERM PRO VIDED PRO VID -ED 9' GRAVEL RqAO' 757 758.5 1 Z 8 FT 2.5 FT 199 CY 187 CY 2.97 AC 398 CY 5 FT 80T,7 R. CC! I ii%�S i�la 0307,721 N 0 TE: PROPOSED CONTOURS SHOWN AT 1" INTERVALS. EXISTING CONTOURS Y. SHOWN AT I" INTERVALS. SEDIMENT BASIN SB-33 (DURMG CONSTRUC770N) NTS EVS77NG GRWAfD TOP OF DAM ELEV- 762.31 10 r- DIA. X 13" HIGH 16 GA GA . GALV STEEL M 25 YR. STORM 2.0' MIN. ANTI -VORTEX DE ICE ELEV =76aJ I-f}! RISER TOP ELEV=759.3 DRY VOLUME ELEV Tn_j T ]I- REQUIRED = /56.8 10 DIA. DEWA 7FRING III DEVICE 1NV=75Z19--' UPSTREAM TOE OF DAM F-711 i Fml __Fl MIN. 30' COMPACTED SOIL OR AGGREGATE OVER BOT70111 OF BASIN BASE PLATE- ELEV - 75"0 8'x8'xll4" THICK GALV STEEL BASE PLATF- (2) 3.4' X 3.4' GALV: STEEL ANTI -SEEP COLLARS ' DIA. CMP RISER /Al= 00 INV. OUT= 754.00 7 EXISTING GROUND OUTLET PR07EC77ON VDOT CLASS fl F--C--1 RIPRAP 3d==4.5, L=10, W--14.5' D=2' 70 CY W1 GE07EX77LE FABRIC UNDERLAYMENT 24' CMP 0 1. 7Z L = 60' -SEDIMENT BASIN SB-4 (DURWG COKSTRUCTION), 1vTs kXSflNG OROUND TOP OF DAM BEV- 741.001 F -4Z DIA. X 16' HIGH 16 %GA. GALV STEEL 25 W. S70RM 2.0' MIN. AN71-VORTEX DEVICE _l I EUV. =7219.00 ' MIN. lj_wtrll RISER TOP ELEV=736.00 1.0­27" DIA. CMP RISER =1 it I—, DRY VOLUME ELEV 10-51 --III REQUIRED = 737.50 4" DIA. DEWA7ERING �INV /Amf- 00 INV. OUT- 729.00 DEWCE INV=735. UPSTREAM TOE OF DAM EXISTING GROUND MIX. 30" COMPACTED SOIL OR AGGREGATE OVER BOT70M GF RASW BASE PLATE OUTLET PR07EC77ON VDOT CLASS fl ELEV = 7-UOO' 8'x8'xll4' THICK GALV EC-1 RIPRAP 3&,-4.5' L=12' STEEL BASE PLATE W=13.5' D=28.0 CY W1 (J) 3.4' X 3.4' GALV STEEL GEOTEXTILE FABRIC UNDERLAYMENT AN77-SEEP COLLARS-,- I' OMP 0 &7Z L = 70' SEDIMENT BASEN SB-5 (DURMG ,,.`0NS,TUC7T0N) NTS DOS77MG GROUND TOP OF DA 2EV 0. 7230 to -4r DIA. X W HIGH 16 GA. GALV STEEL 25 M S70RA4 2- 0' MIN. ANTI -VORTEX DEVICE ELEV. =715.30 RISER TOP ELEV=71ZJO LW MIN. ­30' DIA. CMP RISi III ER DRY VOLUME ELEV !A,6. 111 'E_--=l I I 1 REQUIRED = 716.8DEWA 7FRW0 0 -INV IN= lzoo '4" DIA. INV. OtJT= 711.50 DEVICE INV=714.9,'�`Z 5! 20 2d M-, UPSTREAM TOE OF DAM EXISTING GROUND M MI -I L "lir --I l T MIN. jo" COMPACILL) SOIL OR AGGREGATE' OVER MIT BOT70M OF BASIN BASE PLATE w OUTLET PROTECTION VDOT CLASS H ELEV = 71200 a'x8'xI14- THICK GALV EC-1 RIPRAP 3d<,=5.25* L=14' S7EEL BASE PLATE- W=15.75, D=2' 10.9 CY W1 (3) 3.2' X 3.2' GALV: STEEL GE07EX77LE FABRIC UNDERLAYMENT AN77-SEEP COLLARS adp e asox L 60' NO TE: THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE, ANDIOR CONVERT TO PERMANENT STORMWA TER MANAGEMENT FACILITIES (WHERE APPLICABLE,}. ALL EROSION CONTROL MEASURES ARE REQUIRED BY THIS PLAN, REGARDLESS OF THE SALE OF ANY LOT ,. - AREA 88 ­ - _. ____ � � , AREA 41 i AREA 81 - I f5l� I AREA III 9 O.LF: ft. 0 x I i i 0. L. F: ft. 0 X * ft. 0 Z z I , , 11 CF: ft. 0 AH- �, Area(ac.)= 0. 09 C=o,, go Area(ac.)=O. 18 C=0- 75 1 1 Area(ac.)=O. 0 0 Arec(oc.)= 0. 04 C-0. 90 If Tm V Tc (Min.)=5 min. ;r4o=6.8 Ii &/=9.5 `02= i i2= 5.2 ijo=6.8 ijoii i,J, 1 1 12= 5.2 4o=6. 8 lja�=9.5 42 Q,o=O. 55 Qq,F=0- 96 0. 70 Qlo=O. 92 QOFI. 60 I �_7eq� '­ 02= 0- 80 Qlo=l. 04 Q,F ­­,'­�� I t,�,F­�`*­--7XE2L�!�� ,:L� - - -------- �271- AREA 94 - _�Io�=���� � 1 AREA 41B % AREA 83 49� - ll � AREA 113 �� - i ; 'i 0 z : C.F: 17.0 ,Lh ft. -1 � @ I Area(ac.)= 0. 0 9 C=0. 84 Area(ac.)=O. 42 C=O. 45 7: AreG(Gc.)=0.24 C=O. 65 Arec(ac.)=O. 14 C=O. 90 T (Mirl.)=5 Mjn� /C Tc(min.)=15 min. 1,Iio=4.8 " T. (Min.)=5 m in. v Tc (Min.)=5 m in. h1=6, 3 &19.5 I •I J,od=b. b R i2= 5.2 4o=6.8 ijvd=9. 5 ',,�02= � 6 8 ijoJ=9.5 Q,=0.J9 Qto=0.51 Jr 66 Qlo=O. 91 QqFl� 61 . 11_�­ -0i, __ ____ �_- 1, I ::� law- _ 02= 0.81 =1. 06 Q,,=-I. 48 'I - 7.77l�,,01, .i �_ �W� .,O - 0. 66 Q,,=0. 86 QF1.20 - 7-, 1 M"111 Sw I ,Knlil,_, --- low ON, AREA 13 g, - ', � , AREA 43 I j AREA 85 I P'i 1 ` " AREA 115 V , I z. 175Z A ULP' Jooft.@ 0.04Z k aL.F: 260ft.@ O. 10 Z 0 AH: ft 'I @ AH- ft -�-� CF: ft. @ A: ft E � 1� Areo(oc.)= 1. 61 C=O. 45 I ' Area(acj= 0. 51 C=0. 55 mt� , Area(ac.)= g T, (Min.)=5 m in. I Tc(min.)=11 min. T. (Min.)- 12 min. I � �, ` �i i &=6 8 iiii 2= 5.2 2= 4�0 ijo=5.4 &F 7. I i 1 2= 13 9 ilo=5.3 iw=715 11 i2= 4.7 iio=6. J wF8.8 ­4 I, 83 Qlo=l. 09 Q�fl� 9 7 1,,Q2=,Z- 9 010=j' 91 QVIF6' 9' � %­,� i�_ �o--�,n_u�i IQ -109 Qlo=l. 49 Qw=2. I 0 -, 1 �7 7­ ,,, "I ��i� �� ."-, , ,, - ­­ � 11 li, 02= 2.04 Qlo=2.74 QaFJ. 8J , *�F�-,,,­,-,, MWOU-M)TM I AREA 15 OK,:7-�--,Z77�1_ 1 AREA 45 - AREA 87 v - �, ! "� "L , AIRI REA 117 M e"­ 7.JJY. 01F: 225ft.0 E0.04.9 �,,`-','l � I i ; 1�30oft.@ - I CF: ft. @ AH ft. I ft. @ Z�,H ft � CF: - V, v ri 11 iArea(ac.)= 0. 0 7 C=o� go Area(ac.)=2.28 C=O. 45 Area(ac.)= 0. 81 C=O. 54 0 j Area(Gc.)= 0. 43 C=0. 71 Tc (min.)= 1 5 m in. i Tc(min.)J=10 min. ,k lio=6� 8 &F9.5 i2= 3.5 ho=4.8 iiiaF6.8 i2= 4�2 4o=5.6 JioFZ 9 �i 12= 5.2 &=6.8 &F9.5 A 02= 0. 62 Qlo=O. 82 Qa�= 1. 14 , a�l 02= J. 59 Qlo=4.92 Qod=8. 72 - ,T� ��­, " ,7, �, - -1 r,� _-­ � -,7� ,,, M, � ,� ,:" Ii�l_ � I =_�,_% �02= 1.84 Qlo=2.45 Q,F3l, 46 I �­- ­,"- ,,­_ �, ­77,-,T�, - _�_ ­ _ , I wllcl�les'111�,; .. , 1, I 02= w Q10= - Qoi= i -_ �7 7-1 P11-71 � = ­ , yi„nI I i AREA 17 I , .Dir, - AREA 53 I I �- AREA 89 v - - V_ AREA 119 - ,�[ ,� I - 011: ft. 0 , - ft. @ Y. * 'r' OLF- ft. @ 7. � " t. @ 0. 0 7 Z, 1 U.L.f.: Z10f ­� I 11 I Area(ac.)=0.20 C:---O. 6 0 Area(ari 0. 22 C=o. 90 Area(ac.)=0- 17 C=O. 82 t, Arec(oc.)=0. 52 C=O. 52 , i2= 5.2 &=6.8 &Fg� I el 62 Qio=O. 82 Qo�=I. 14 I - '02= 0.80 010=1. 04 ;=1,,4 5 - , ­ Q,, ­1 "- -, 02= 0. 72 Qlo=O. 95 Qo�=-1_52 ,202= 1.37 010=1. 8J QoF2.60 ff__� r r --- - I ., ­ , � AREA 19 ,­glc- A 55 -9, - AREA 91 - ■ '( i AREA 121 iri " 01F: 170fiV 0.059' - 01F: ft. @ x 111", �. D F__ ft. @ X 5 O.L.F: 280fi.0 O. 1OZ i i Area(ac.)= 0, J 1 C=0- 90 I I I, Areapc.)=O. 12 C=O. 90 �;, " Area(ac.)= 0. 65 T, (min.)=8 m in. i � T, (mh.)=5 � min. ! Tc (Min.)=8 ,4_,� 5.2 4o=6.8 &,�=9.5 _ � , 1, 12� 5.2 &=6. 8 &F9.5 ' &=6. 0 ii,F8. 5 = 0. 9J Q,o=l,QOFJ- "k J1 ,,-, ,,� ,,= - p ��=- 7�1-��,I,,,,F ,,r_Zff,�i ,z'N't 7W� ,,�,k,,�T� - 102=0.56 Qlo=O.'7J QaF1.Qo,=2.76 , ; ", � ��, " .... 7 ,�a , ��_., � , - - ,���_:,�!L,__­,_ ­ --- __ _�­ - j i, - - MPMT,� � 7`, -1 L��_ ,_� 11 � 1, . ,,ff��g - - AREA 21 M . �, _ _ _ _ _ - I AREA 59 - 1 AREA 93 - , AREA 123 - ' 01F: 210ft§ 0.044Y. - 01F: J00fi.@ 6Z I 1 I O.L.F: 230ft.0 X LF 210ft.@ I 0 " - CF: @ AH li Areal(ac.)=0. 65 C=O. 61 Area(ac,)= 0. 58 C=0, 49 , Area(ac.)=O. 79 C=O. 79 E Area(Gic.)= 0. 30 C=0. 55 , (min.)=8 m in. I T Tc(min.)=16 min� 1 � T,(in.)=10 a, M 141 i 6 m ," T, (min.)= in. i2= 4.5 &=6. 0 Jiai=8.5 i2= J�4 iio=4.7 4,6=6 7 -1 /.� = 4.2 ijo=5.16 &F7.9 - � i2= 4.9 &=6.5 49F9. 1 , 78Q0,;=3.,J3 7 ; ., I = J. 06 Qjo=4. 00 Qoo=5,.58 t" I - [02= 2.62 Qjo=,3.,49 Qvo;=z�t,93 lrl 11 �, ­ ��t-�,w�-, �,2= 0. 81 Ql,=l. 07 06;= 1. 50 �m,­a­ � llw­ _ y MWMM_ - M " AREA 23 I - AREA 61 I AREA 95 9 AREA 129 OL.F: ft. @ x 0 AH- ft Uf.: ft, & AH., fl, il� I A 1 0 , Areo(ac.)=0.90 C=0. 55 Arw(ac.)= 0. 32 C=O. 90 1 ­1 Area(ac.)=O9 . 0","I Areo(ac.)= 0. 2 I " Tc (minj=5 mC=i0n-. I 2= j. 9 jjo=5� i jjvFZ 9 i2= 5.2 4,0=6.8 , I i2= 5.2 4o=6.8 &F9, J, - &=6.8 &19.5 89 Q,= I. 93 Qlo=2.62 Q,v;=4.89 ,02= 1.50 01M. 96 QaF,3A - - , Q2= 0.J3 019=0. 43 QoFO. 61 ,x t"', -K. �.�,M �*-",-"&%",a�,��_,,7��,- "". 7F_Z�-, ,­�.. - ! �0,= 0. 78 Qio=l. 02 QaFl. 78 ,. 2,777777�_-_­�­ 1 1 .... AREA 27 11 AREA 63 AREA .i'130 - OL.F: ft 0 z 1 - , 01F: 200ft.0 9z : 01.F: ft. P Y, --Ji OE F: Y. "' ft.@ zl'I CF: ft. 0 AH- ft ' @sr, CF: ft. AH, ft. ft. 1 AH: ft. tCF: @ INC F: ft. 0 AH: ft Areo-(ac.)=C=O. 68 1 Area(aa)=,37 . I I i" T,(Min.)=15 min. ., _ * 110=6.8 ljojz9.5 &F7.24o=6-B Ji,g=9.5 ,,,, 12 = J. 5 &=4.8 ilOF6.8 : 1 02= 0. 5 7 Qlo=O. 75 Q,,;=1. 04 ,02= 0.87 Qlo=1.20 Goo=212 - jf =1. 66 Qoo;=.2. JJ 010 -, 1�02= 64.9 Qlo=89. 0 QoF126. I I --- ­Y­­ ­ . ; ;1 , i AREA 29 - AREA 67 AREA 99 S, & - 01F: - 7. I 511 @ 0 rr. AH- �� Area(ac.)= Area(a= I - I 0 1 C=o, 45 Area(ac.)= ►0. 2 7 C=0, 90 Tc(min.)=12 min. T,(minj=5 min. i I !,,,=6,8 4aii=9.5 i2= 3, 9 ilo=5. 3 4aF7 5 i2= 5.2 ijo=6. 8 JioF9-5 ,a 0,,=O. 6 7 QoFu_�Z, 62 QqF4.64 _=.jk Q2= e -, ,- - ,a II AREA 69 AREA 103 : I- , 135ft.@ CF: ft, @ 0 Cr. 9 Area(ac.)=O. 40 C=0� 54 Ar60(6c.)=0. 15 C=0.90 � Arw(ac.)= 0. 1III 4 . 12= 4.9 ijo=6.5 &F9. 1 I . " 5 2 &=6.8 &Fg- 5 = 12 5.2 4o=6_8 &F9.5 1 ;02= 1.06 01,=1.40 Q,�=I� 94 - 70 010=0. 92 Qod= 1. 2 ? 7 � I ­ I I 1­1- - 02=Q,o=0. 86 W'7777��i-­�r - li I�gw,i�j?!p ialwaummuff-wi- L AREA 33 gi AREA 71 AREA 105 11" O.LF: J00ft.@ 0.04T O.L.F: ft. /. 4 U @ AH. CF: ft. 9 A ft. Area(ac.)=O.J7 C=0. 52 Area(oc.)= 0. J 7 C=01. 52 Area(oc.)= 0. 04 C=9. 90 ax i; i2=39 46=5. 3 ifoFZ 5 i2= 5.2 1=6.8 &Fg.1,o=6.,8 iii _1 QIM. 02 Qw=. TT?k�D�m-r-_,-,mml;_,Tlllmwr7l�e_� • AREi 35 - I 1_,il­=�_ AREA 77 AREA 107 - z i Area(cc.)= 0. 92 C=O� 45 ii Area(ac.)=0.00 . 000. 05 C=O. 9 0 i (Min.)=5 min. T. (min,)=5 min. - i2= J.J 64.5 110F6.5 ,, b=,5.2 &=6.8 Jivii=9.5 i2= 5.2 iio=& 8 I : Q2= 1.37 010=t86 Q,o=,'5 J6 �11 1�10_,_� 02= 010= QOF 02= 0.2j Q,,=0_31 Q,:=0.,_'_ - , - I ' - - --------- AREA 39 _. , - , 01 - -AREA 79 --- P" -AHEA 109 I - 011: , UU.: CF: ft. 0 Ak ft C.F: ft. § AH, ft _.' I' Cf.: ft. 0 ,�, ft isi Area(ac.)= Tc(min-)=18 min. Tc(mb.)=5 min. - Tc(minj=5 min. 1, i2= 3.2 ito=4.4 Jiog=6. 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" ,. � �� I � � � � ) � ; ) 1 I I 1 1� i \ �, � � --- / .5 � � � 1 � , � I" �, ____\ - 1__ \ \ \1 I\ / /i,i� ill , , " " t ,)� �, \ I i i � '\ \ \ � I / ( I I I - - � % erg " __\� - I P� � I I -,-- / \ I 11 ("I Z I - 1­ _/ i � i / "I � I , - _ - - � k , , k I __ ; I ! I , - - / � - , ; � � %-I- ____ , \� \ I � \ I I � �, ./ f � i " - - , j I __ I / � / - I . .- I I � I � I \ I � ) REM 01 ,w AIN+LJNK . ", �, \ 1� , \ I � , i j / w , = iN � � , " � /,/ / // I .1 --- , I- \ \" '1`1�\ I I / I � / \ I , " , ") - i 'T , -,\ \\ 1 \ t � *__11 i I . i � /,. 11 ? `1 - z 1 71�2 ' � , / / - 1_' , � / ___ __ __ __ \ � I i - _-I � / 7REG � 1, / � 10010 ­1 ; I � F%P , //, i EiGSnNG � .1 __ - \ -,- - " ,"',_ - � I f i � ----x /�o 1451, 1 1 � / 1 / - � _ -, ,, � 11 / __ I II ,�, \ - � � I 1 i I ; I / \ 1, 1, _1i i I , >�yo 1 ­ 'j ; I 11 , i f � / " 1/ - �,� 1/ �, _­__ --.---. '-\ FM I 1, I I I I- . 1 i I / I / / I ! I /-' "1�1 '� - _ 4,__ __- I .1 I � I / I / " / , I , / /. I" I/ I . - _/ / / - I - 5 . , I f< ­, 1. ), f ( 1� , f _ _.,�80-' -_ / , I � \, - I / I -1 1, \ \ \ \ , "\­, " , ,� 4 11 I ­1 1,:_­ \ -_ ­ .- __ / .. i / I / I i I / / %I I I ! ; i I / f / " 'f / __ ­6t)9CH­­_,_ ­_ , "I , \ I \1 I � 11 I '. / , 4, (I . / , / I i )/ I MARK , f i ­ I ) / " " � / i ; I , , ,/ / ELEV-7-48,7-2-1 \ \ \ 55\ \ . ,'I - �­<)_ / I / - / , ----,- , - _� , � \ , \ I i ; 11 __� . r --a- / j i I / , j/ / "! // li -1 (CP TBAR) \\, \ / I � I � I / / / "'! , , __ , -, - � 1-1 I _____ -.-, "--- �, � I \ I ! i ' I / ­_� , i ! i ) I , ,,, \ \7 I � I I sr W7 I H 1 _7�_�/ " / / , I I/ I ! I . \ \ � C, - I /' I / I No E C5 �10 (y) 0� I r- CD CD w - ru . 0j z � 0 0 L - ) c u Li V) LD Lu 1i 0 Z t-+ 2: <1 0 ry V) > 6) uj E fy_ 0 z -P :5 0 >1 d _j (3) �5 f=) 06 t-D I I 14- . w w Rj u l k � E 0 f:� Q 0 DATE 0 u 2/-3/06 El 0) DRAWN BY z 0 - - � - _-, LLA DESIGNED IF y � 0 - NZ I I Ld LLJ - CHECKED BY CK u I S, COLLINS I-T r- SCALE 0j W (u 1" = 106" D w - +> u .9� ) 0 L CIL -Z C; 5 u CL Q� Lu < 3: ,t P-4 Z M: �_, . (9 Cy. rv_ 0 5 , M 2 0 ,Z C6 U ,5 , � ­ __j I ud 0- < Lu 1 �E: Lu 1 LU 1! Ca � �..4 ,4 � I 5 �_ " uj ,( � 47, r2 ,& " 1-.4 0 W _1 !�ej < uj..L Lu W I.- 1--q " , �;,�` I �- I u .j < rl� 0 .j 0 JOB NO. 22274 -:- SHEET NO. 5 OF 111 I I I V0 A (DURING CONSTRUCTION) NTS EXISTING GROUND 10, -36" DIA. X 13" HIGH 16 TOP OF DAM ELEV= 739.51 r GA. GALV STEEL J�­ ANTI -VORTEX DEVICE 25 YR. S TORM 2.0' MIN. I' ELEV. =73750 1` i1.0' MIN. RISER TOP ELEV =7J6.50- 24" DIA. CMP RISER LD I Int I IA.4r ELEV. T/I AZI 7 REQUIRED = 7J5.80 IN tl IN= 732.00 BOTTOM nC n, lu UIA. L)LWA1tK11V(.7 INV. OUT= 731.00 ELEV. = 73J.0 DEVICE INV=7J4.55 15' 21' 21' 6 PERFORATED SCHEDULE UD IN ELEV UPSTREAM TOE OF DAM EXISTING GROUND UNDERDRA IN GRAVEL 40 PVC PIPE OR EQUIVALENT 73J. 25 (TYP.) S8 i7 (AASHT0 M4J MIN. AAA2 1.=, SLOPE (MIN.) TO DI LUCK BIO_FjL-,rER MIX OR TESTED 1"ABOVE & BELOW OR STORM DRAIN PROVIDE F W OMPA C TED A-1% MIN. JO" C AND APPROVED EQUIVALENT TOP UNDERDRAIN PIPE) ELEV= 736.5 (TYP.) DEPTH= 2.5' ACROSS ENTIRE ID TH 0 20' 0. C. SOIL OR A GGREGA TE OVER OUTLET PROTECTION VDOT CLASS H tor'' SLOPE= 0.00Z BOTTOM OF BASIN BASE PLATE -TI EC-1 RIPRAP Jdo=4.5' L=10' ELEV 7J2.00 8'x8'x114" THICK GAL V I `r , �;, i ! � %% \ �_-/ ', � STEEL BASE PLATE A TE W=11.5' D=2' 59 CY W/ GEOTEXTILE FABRIC UNDERLAYMENT (3) J'XJ'GAL V STEEL %0 'l`; ANTI -SEEP COLLARS 18" CMP @ 1.507, L 67' Ij Z 6 IT V 104',T, lit X W01 -- ---- --------- -- - ------- - ----------- 1992 TEMPORARY SEDIMENT BASIN DESI EN�';�GY DISSIPA TOR, N 01 Cb-iSS I RIP -RA ------ 2�A _0w� or without an erne A 0,OX SLOPE 2' M 0 ----------- - FILTER Creekside III 75A "UNDERLA T, I L=10' Total area draining to basin: ;1 3.99 !acres. V 2 Basin VolumgPesign A, - -- ------ 01A �Av_ j -B.10F[L TER 4-zEl il (AFTER CONSTRUCTION) k.44 NTS CLEAN -OUT W/ Top OF WA TER TI GH T DAM DISCHARGE APRONS SHALL UNDERDRAIN MEDIA CAP (TYP.) ELEV = / PROVIDE PROPER SCOUR 7J9.5 PROTECTION PRIOR TO FIRST FLUSH RELEASING f?l nAl'rfl VA TER SURFACE SIR, 101, 3" OF PEA GRAVEL SHALL BE PLACED INV OUT BETWEEN THE FILTER 7J7.84 MEDIA AND THE wwvm�� Yrol,CD/ \-�- 2- V3PN I f C) 16- -P V, 5' 0. C. 7-, VBDN Ln B ff I I"-RETEN1�0N ,�AREA #1I fit 15-AN, 5' 0. C. J- VBDN - 5-HVI- JIJO S.F-APIFR_ SEED A41X 6-IGL- Jr 'Z 3'C ALF:" I THE FILTER MEDIA 0. O%A ELEV - 737.5 OUTLET PROTECTION VDOT ')LUHL CLASS I EC-1 RIPRAP V11 OUTLET PROTECTION VDOT GEOTEXTILE FABRIC GLASS UNDERLA'r7dEN T I F-U-1 rxir-1-�mr- ELL = WIGEOTEXTILE FABRIC 736.5' + UNDERLA YA4EN T C/o 2.5' 57 LF 0 5.067. E:L V. 7. 0 MIN. (TYP.) -IN11 OUT= 73-2.97 MIN. .---EXISTING GROUND .GENERAL B10FILTER CONSTRUCTION NOTES: 1 . Bioffiters must not be installed until the site is determined to be adequately stabilized by the erosion control and water resources inspectors. 2. The water resources inspector must inspect the under -drain installation and approve the soil mix prior to backfilling the bioffiter, and approve the completed installation. Therefore the following note will be added to jthe stormwaterIBMP plan: 3. Contractor shall contact the water resources inspector 24 hours prior to backfilling the bioffiter and request an inspection and approval of thel under -drain installation and the soil mix. LSP-11 50% Removal Rate = Bioretention basin with capture and treatment volume equal to 0.5 inches of runoff from the impervious area. Impervious Area: Total: 129,810 198 AC. Water Quality Calculations: Treatment Volume Required 1. WQ = 129,810 * (0.5/12) = 5,408.75 CF 5,409/43,560 = 0.12 AcYt. 2. Min. Bottom Area = 2.5% of Impervious Area 129,810 0.025 = 3,245 SF 3. Hmax = 1.00 Ft. Treatment Volume Provided Bottom Elevation = 733.00 Area available at Bottom Elevation = 1,399 SF Elevation of Surface of Bio-Filter Media = 736.50 Area available at Surface of Bio-Filter Media = 4,856 SF Volume at Surface of Bio-Filter Media = 10,834 CF First Flush Elevation = 737.50 Area available at First Flush Elevation = 5,975 SF Volume at First Flush Elevation = 16,245 CF WQ Treatment Provided in F above top of Bio-Filter Material WQ Treatment Elevations = 737.50-736.50 WQ Treatment Volume Provided = 16,245-10,834 = 5,411 CF NOTE: 1. Reservoir volumes are calculated using the Conic Method. OVERALL PLANT LIST KEY Onty. BOTANICAL. NAME COMMON NAME MINIMUM INSTAL -LED SIZE ROOT TYPE REMARKS CHV 5 CHfONANTHUS VIRGINIICUS FRINGE 'FREE 2" CAL. B&B MULTIPLE STEM Cos 20 CORNUS SEERICEA RED -TWIG DOGWOOD 18"-24" SPREAD CON T, DENSE/FULL HVI 10 HAMAMELIS VIRGINIANA COMMON WITCHHAZEL 6' HEIGHT B&B SINGLE LEADER IGL 28 ILEX GLABRA INKBERRY HOLLY 3'-4' HT. CONT. DENSE/FULL LST 7 LIQUIDAMBAR STYRACIFLUA 'ROTUNDILOBA' ROTUNDILOBA SWEETCUM 2" CAL- B&B SINGLE LEADER MYPN 24 MYRICA PENSYLVANICA NORTHERN BAYBERRY 18"-24" SPREAD CONT. DENSE/FULL NSY 7 NYSSA SYLVATICA BLACK GUM 2" CAL. B&B SINGLE LEADER VBDN 22 VIBURNUM DENTATUM ARROWWOOD VIBURNUM 3--4' HT. B&B DENSE/FULL AN 87 ANDROPOG(ON GERARDI BIG BLUESTEM 4" POT CONT. PV 100 PANICUM VIIRGATUM SWITCH GRASS 4" POT CONT, AP/FR 9,775 MIX OF SEED 50% AGROSTIS PERENNANS 50% FESTUICA RUBRA AUTUMN BENTGRASS RED FESCUE SEED PER MANUFACTURER'S RECOMMENDATIONS 8,834 WILDFLOWEIR SEED MIX* SEED PER MANUFACTURER'S RECOMMENDATIONS ,SC TT R. CCOLL111INSZ No. 35791 L- 4 Z 0 U (n LU 0 1­4 5­1 -2 SEDIMENT BASIN SB (DURIIVG CONSTRUCTION) B10FIL TER 12 NTS (AFTER CONSTRUCTION) NTS S 7R. 9, is\ \ ­J� IN V OU I= 704.90 J" OF PEA GRA VEL is SHALL BE PLACED Top OF Is BETWEEN THE FILTER CLEAN -OUT W/ ElR ELEV 706.5 EXISTING MEDIA AND THE E ING GROUND WA TER T1 GH T DAM DIA 42" DIA. X 15" HIGH 16 DISCHARGE APRONS SHALL CAP (TYP.) ELEV 10, UNDERDRAIN A4E TOP OF DAM ELEV 707-51 7075 GA. GALV STEEL PROVIDE PROPER SCOUR V -VORTEX DEVICE FIRST FLUSH ANTI PROTECTION PRIOR TO 25 YR. S TORM 2.0' MIN. WA TER SURFACE -OF -OUTLET PROTECTION 11DOT RELEASING RUN-OFF ONTO lj CLASS I EC-1 RIPRAP W1 1.0' MINA THE FILTER MEDIA RISER TOP ELEV=704.50 30" DIA. CMP RISER To-. 37- - OUTLET PROTECTION VDOT DRY VOLUME ELEV GE07EXTILE FABRIC ELEV =705.50 ELEV 705.5 UNDERLA YMEN T REQUIRED = 704. 00 IN V' IN= 700. 00 CLASS EC-1 RIPRAP ELEV 111=1� 10" DIA. DEWATERING INV. OUT= 695 WIGEOTEXTILE FABRIC 704.5' *n R + I INV DEVICE 702., J6 15' UNDERL A YMEN T 2.5' 70J 00 57 LF 0 2�207. • UPSTREAM TOE OF DAM EV= a,,; EXISTING GROUND MIN. EV 700. 00 INV OU 7" 6,99.9 7 P.) (Ty 7.0 ' -EXISTING GROUND MIN. MIN. 30" COMPACTED 15. 0' MIN. - SOIL OR A GGREGA TE 0 VER OUTLET PROTECTION VDOT CLASS fl EC- 1 RIPRA T E BOTTOM OF BASIN BASE PLAT P 3d,=6' L=12' W=14' BOTTOM OF 810FIL ELEV 700-00 8'x8'x114- THICK GALV ELEV 701.00 D 2' 8. 9 C Y W/ GEO TEX III- E STEEL BASE PLATE -6" PERFORATED SCHEDULE 4 UD INV ELEV = 1 f\ FABRIC UNDERLAYMENT UNDERDRA IN GRA VEL 40 PVC PIPE OR EQUIVALENT 701.25 (TYP.) sh, (J) J.6' X J.6' GALV STEEL (AASHT0 M43 MIN. AAA2 1.07. SLOPE (MIN.) TO DI LUCK BIO-FILTER MIX OR TESTED 24" CM @ 750% -SEEP COLLARS ANTI ------ i is 1 ABOVE BELOW OR STORM DRAIN PROVIDE AND APPROVED EQUIVALENT TOP (, - \L= 67' UNDERDRA IN PIPE) A CROSS EN TIRE WID TH @ V, ELEV= 704.5 (TYP.) DEPTH= 2.5' 20' 0. C. SLOPE= 0.00/ N411 S, X WV 1, AP, GENERAL BIOFILTER CONSTRUCTION NOTES: 1. Bioffiters must not be installed until the site is determined to be adequately stabilized by the erosion control and water resources inspectors. -2 2. The water resources inspector must inspect the under -drain installation and approve the soil mix prior to backfilling the bidfilter, and approve the completed installation. Therefore the following note will be added to the stormwaterIMP (gJlane 3. Contractor shall contact the water resources inspector 24 hours prior to backfIffin9 the bioffiter and request an inspection and approval of the under -drain installation and the soil mix. B10-DETENTION AREA #2 CALCULATION SUMMARY 50% Removal Rate = Bioretention basin with capture and treatment volume equal to 0.5 inches of runoff from the impervious area. Impervious Area: Total: 219.542 5.04 A.C. Water Quality Calculations: Treatment Volume Required 1. WQ = 219,542 * (0.5/12) = 9,147.58 CF 9,148/43,560 = 0.21 AcYt. 2. Min. Bottom Area = 2.5% of Impervious Area 219,542 0.025 = 5,489 SF 3. Hmax = 1.00 Ft. Treatment Volume Provided Bottom Elevation = 700.00 Area available at Bottom Elevation = 3,254 SF Elevation of Surface of Bio-Filter Media = 703.50 Area available at Surface of Bio-Filter Media = 8,412 SF Volume at Surface of Bio--Filter Media 20,355 CF First Flush Elevation = 704.50 Area available at First Flush Elevation 10,0 11 SF Volume at First Flush Elevation = 29,555 CF WQ Treatment Provided in Fabove top of Bio-Filter Material WQ Treatment Elevations = 704.50-703.50 WQ Treatment Volume Provided = 29,555-20,355 = 9,200 CF NOTE: 1. Reservoir volumes are, calculated using the Conic Method. 0 0 ,ISC TT R. COLLINS`_, No. 35791 -- .. - - - -- - --------- - -- '- -- - -- i ;ecu yds 2.97 acres 199 icu yds. I -- - _ . __ _ ..-_ __ ._.__ _ -- ___ i r __r i ' _. - - _ ; 2 ;Available basin volume ', 199 ;cu yds. at elevation 757.19 ; _ _ i. ___ _ , _.__ __. _ _ (From storage elevation curve)_ _ ___-- i _---_ ._ _ - - - ___... __._. J_ __ _._____ - . � . .. _- . _ f.T.... 3 I Excavate ; 199 cu, yds- to obtain requirred volume -- --- -. t _ ._. _._. l-- .. .. - --- - �' - _ -. li._ __'L. --- __- '_ _. - - .._.. .. _ ._ - ._ i I Etevation corresponding #o rEguEred volume = innvert of the dewatering i _-._ i- ._,T..- ... ._-r.__.._ _ ..— .. .. _._ [orifice. ; 757.19 _ ;dewatering device elution ' ' ,III�_. -, - - - _ _ ,- - 4 Available volume before c(eanauf regulred: _ _r- _ _ __ . _ ____.___ ,_ ..__ i - _. rtw - - , __ _, -- * Elevation corresponding to required volume = invert of the dewatering ( ____ _ _ - - -- orifrce i 735 ?7 ,dewatering device elevation - _ _.__... --_ ___.__ _____ ._ _ --- - , I _- s_._. ____.. _ _--_.-_ .__ -___. ` 4 ,Available volume before oleanout required i _i r-' -,_ ; , j i I { _ _^ 33.5 c y_ x i 5.98 ;acres =1 200 icu yds_ , 5 IElevation corresponding to oleanout level = ' 7.4.70 r ` ___ __,_._. _ _.-,-._ _,.-_.._ �__.. -_-. - , I , : .___ _ _...._. L. _. _.-. .. _ ____,,.__. r.._ _._._ _ - i(From Storage -Elevation Curve} " ....,_ _ ._. __ __ .___ _.._. . _ ___ __'.._.. ____._ Pi I- __- __--------- - --_- _ ---- ----- - ------ -- - -- ;------ -- - ? 6 I Distance from invert of the dewatering orifice to oleanout level M , 1.07 , jKRin 1 0 ft _. - - -r-__)- __ __ ___ � _ -.--.. - - - -- - - --- I- _- - - - - = -- --------- _-.__ ,__. _-_. - - _. i ___._ ...._..- --" - - i - , -' 79af Storage -_4_­ ______ -_ -. _ .-.._ _ -_ __.._. _ __ .i-_ r J IUTinimum required velum_ 2 67 cu yds x ioial trainage Area (acres).-_- _. _ _ __. '._ ; --- -_ _ 67cu yds,X ! 5 98,acres - 401 �cu, yds , _ ___ 7 -_ - - i _ I-- . _ __-...__. ____ __ _ -- _ _ ._ ,_. .. ' i I . - - -- -- --- -- - --- -- - - - I_ ! : i _. _ .. -_ __ __ ____ _ _ _. 1 _ _ -_ - ___ 111-112 i r""__,.._ --.._. _._ _. _. _ _ ..._ _._,-. , _ . . _.__.. _.. . __--- __ ___.___ _.__ . _._ _ _.._. _ . _ F -- _, . _ _, .. -- -_._ et Storage ` __ I - -- _ .__ __ ._ ___ -, -_ __ ... _- _._ __ - __ . _ --- - -.--. sI .__ - !� _._ _ .. _ .. _ _ --_ - __.. _- _._- _ 9 itirnmiarn required volume _ �7 cu yds xTotal Drainage Area (acres__- i__ - -- _ _.-.._ _ ____.____ _._.. -; _ _ ..___... i___----- -_ ._.__-- _ ..;-__. __. ___ _.V_.._.-- 167 cu, yds.: 7.18 ;acres=; 481 jctu. yds. -.___ +---____ ? I i - - ,____,. _ , . ,.__ ____ __,_. ..__._.___. _ - __ ._ _ , __ __ - 2 :Available basin volume :' 481 ' cu. yds _at elevation 714 9S i _,. - - ,., . .. - - _ - -- t !(From storage- elevation curve) I -__ __-- _-_._.._.__ _ _ .___i_.------ ._I __ ..i_-- ._ r .. ,_. i i ; __ _.____.. . _ _--__... _.. _ __ .., -.__, 3 ;Excavate : 481 Icu yds. to obtain requrired volume'. I . __. _ _ ._. .- _-. _ _. -- _ _ _ . __ ._ ;* Elevation corresponding to required volume_ invert of the dewatering _. _ _ ' . _._ ;orifice ; 714.96 idewaeenng device elevation _ _ .. - _ . .._--_ _, ; - . .. --- --- __ -.. VI _._i__ r.__ ._ ... _... - -. __- r.. ____. _ { .__ �. __. ___ 4 !Avatlable volume befiore oleanout required. ---- ---- _ ____. _;- __ I----- _ ._ 33.5 c y x 1 7.18 ,acres - 241 ctu yds. - — i _---- _ _ _ i 5 Eievatxln oorrespandrng tv oleanout level = i 713.87 I ' _- 7 --- _ _ _ - -- i _ {From Storage___ Elevation Curve) - - _ _ -- _ _. _ _ - 6 Distance from invert of1e dewatenn orifice tai oleanout level (ft} 1 28 4 - -- -- 9 -- ---� ._- _ �. _ - ?- _ - - - Dry fs`to. 9 - _ - r -_--. -- - 7 rU�nimum required volume = 67 cu y_ds _x Total Drainage Area acres)." - ,._ ,----.. ---, - - _ __ _ - - - ' - - -- '67cuyds,Xj 7.18'acres 481 !cu yds-I _. _ _ . .. _, -_ -._ .. _ _ _ -- -- _ _,_ _ _. _.__._ ____._,__ __`_ _ _ , _ ._.., , -. _.___._ ` __. _ .-------- --I- _ _._ .... --- -- _ - -- -- -' __ Ill -112 _ __. .-�.- _._.._.. ... _____ __ __ _____. .�._.__._.. .... _...___ _.r-_._...__.�_....____.. _ __ _ .E_____. r _. - -_ - - - i , _ - _._ ._ _ _ 1992 _ - _ ,_. _ _... -- _; -- ---- '_. -. _ __ _ _- _. _ 3141 f_ _ '_ _.. _.._-- _.____. __.._ __... L 8 ;Total available basin at crest of riser ! 398�'cu,-yds _.. i - at .__- -. _ _ _;_ _ -volume (elevation : 759.30 . (From Storage - Elevatwn Curve)_,.,-_ { r _ - i __..._ i ? --- --- --- 9 Drameter of dewatering orificg =. 4 ;INCH __._ _ __, ,- __ _- -- ' !- 10 C------ er of fiewbie tubing - __ - 6 IPdCH -- 1 ... - - plus 2 Inches} ___..__. -._. __ ___ --- - r ._I -. , : , ! : lEgm(nan Design Elevations_ _.__ .- _-. ____. - - I : i S I _ _... _.. - - I 11 ; Crest of Riser 759 30; _, . i _ (_ .. _ I i_ __ _ __.._ ! . _ _.__ __ i T_ op of Dam ` 762 30; _ _ __ ,__ ..--, _-__r._ _. _ _._ _ _. - -- _ ___ ,_ _. � .. - .-- : _-- 1 : , , i. - .. _ _ -. - ._ - _� _...._...._. _ _, _.__._ _- - .. _. , ;Upstream Toe of Dam 755 00,. _... _ _,_. ___ .__. _ i I L_ _. r __ --- - -- - --- _ ___. _... - __ __ _. - - _ i? _ _._ ,..- __- . __ 1 - - ._ _ _... Basin:p e 1 _ _._ ......_ _ , _._ _ __ . -._ - - I 12 ;.Length of Fiow L = l_ -_. __ __ i - Effective Width . _ ._- __ . i We-- - 0.06 _ i. - . - - -. .. 1 -- -- ---- i I_ _ _-,_ _ __ --__ _ _ _- ff > 2 baffles are not required._. _ -__ _. _..._ i i ' If < 2 baffles are required Required - __ »_ _- __.._- _. - .. _.__. _. - ___ , _... _ -- ": -_"- f . _ - _,_. _- _ _ i I _ - ; ;Runoff ; __ _ _;___ _.-_ _-- _ ---- - ,.-, __.. , _ -- _.._i , , -. _ __. _ -.__. , _ _ . __-._ . ---._.,_.._. __-___,_ ,._.__._- ..__ _ ___._.-_-_ 13 i%= 1 6.18 cfs (From Chapter 5) _, _ __,_ __ .. ___._ .____ ___.._. _ _. _ 14 Q2s 8.67 ;cfs (From Chapter 5} --._. i - - ! I _.----- __._._ _ _----. i - ; _._ . ___- _. _ .__ _., _; i ___ _._. - ,.---_____ - --I- „_ _ Pnnci ai S illwa Desi n ___- _._ _ _ I -- -- -.- cfs j _.. - i 15 ; With emergency spillway, required spillway capacity Qi,=Q2 i. 6.18 hllA - - -- _ - ,_.__. t_ (riser and barrel} __ ...... __. _ _ __.__, ___ _ _ --.. i _ _ _ _ _. i-, - ,__._._,._ __-__-.- --- __.__ _ i Without emergency spillway, required spillway capacity QP-Q25 : _ _._- .- - -_ 8.67 -. -_ .. ,_ -. user and barrel} _. .__, _ _ __ -- ___ _.. _ _. ,.__.._ . -i------. _ __. ____. -_ _. --_._. -,___ _ . _ i I _ 3141 1992i . - _ __ -., __.__._ ___ __,. _ I 8 Total available basin volume at crest of riser _' 801 ou yds at;_ __,elevation_ i 738.00 ,. (From. Storage Elevation Curve) „ i - ...,.—..___.,_,------ _.._. _____.___. , - . ,...,-__ ...___ ___ _-.__ ,_._._ -__.,......_ ___....__- __. ....-..-,__._ .___.____ __.....-.___ 1992 _____. - __..____, __ -_ - . _.__ _ 3.14 _ ` 8 Total available basin volume at crest of riser - . 962 _. 'cu y _s_at _ _T ----- "_ __..-_- _ . __ _--_ _. _____ elevation ' 717.30 . (From Storage -Elevation Curve) _ . -_,.____i _._- _--___ _ __._.___, _ .._ 4 -i ---.. __ _. _ 9 fbiameter otdewatering anfice 6 INCH _ ___._ IT _ __. __ ,. ,. { _ ......_ .. ' ---- , -... ---.. _ _ - - .._ ___ ; 3-- . ` 1 10 Diameter of flexible tubing - . 8 INCH . _, __ _ _-.1 —_ , _ plus 2 Inches) -- - ` - -- - --. --, - --- -.,-.-._.... ._ .. ___.__.il'rebmina Desi n Elevations __ _!_ ___._ _, _______..__ . _. __ - -- --- - j _.__ _. ' -- - - -- ---- 11 Crest of Riser ..____ ._ i 717.3Q_.. ____ _ - i ' I -, __ __, Tag of Dam - -­11- - 72f).34 .. _ ___ , _.._._! I -- ..-__ .... _- - ____. , .._._ ._- . _ __..-_,. _ . _ _,--.. __- _ -_. _ _ _-_--.- __,_.._.. ___..._. Upstream Toe of Dam = 712.0t) _ _ --_-_ _ I _ _ I _ __- _,. _-_ ,.._ .__ __ Basin Shade _ .. _ __ _...__ __:. _-_ __. _ ___ .._ __ __ 12 Length of Flow 't-__ _ - _____ _. _ . _ ____ _.. _ _. _ ., _.._ _ ._ _-._" ,,. Effeciive Width i ___ mire ___ s 2.66 -- - - --__ __' _ - - , _. _. - ` • ---._-, ._ -- .-__. _ .__.-,-._... _. _-_. _- _ _. ___ -__ . _ ___ _...._ . ._. }ff > 2, baffles are noT_requrred _._ Not Re --red_ _ __ 1 L . _ - _'_-_. _____. , _ -_ 1 4 If < 2, baffles a_ re_required__. , ___..__.. ___ ___. _ _, ._. . _.__ _ - - - .._. _______- _._._ _,_.._ _ ..__ _-I--.. _.__.. _'; __ .- __ __ _ _ �_. -. i I- i _.._- _...__ ;--- --.. _ ___ __ _ _.. , Runoff - - - __ - - ---- . __ ., , __ __. __ i _._ _ ' 1 -.__ _,. _,_. _ _, _., - -...._ ,_ _.. _ _ , 13 QZ - 12�92 cfs (Pram Chapter 5) ___-- i _,. _ , , __ _ . . _ _ .-.. , _,_ _--_ _ _._ - . _ ._ - 14 " 5 18.67 cfs (From Chapter 5) -_ I - _ -- ' - - _ _. _._- _ _ _ 1'rinci�aEi(way Design t - ' l _ __ ___ __. -- 1. _ I cfs_ -_ 1 _._ -j _ .__.!_ . . -.___ _ __,_'. _.. _ ____ . _ . -.- 1 15 !With emergency spillway, required spillway capacity Qp=02 12,92 i NIA _.-__ .. -_ (rrserandbarre __ _­i­­---_­ ­__;­_. ___.- ._,_ _- ._ __ _ . Without emergency spillway required spillway capacity Qp Q2s - _. _ _ ___ tIi i 18 67 _ ___ I riser and barrel) ' _ _ _ _-___..-_t___.. __. - _,_ ___ _: _.._ -__ _.._.-. _ -__i. I - ._..._ __.. ,_ _..._..,_j _._._._ _...___ -- -__._. .____...__ . _ __,._ . ____.___ -_- . i ____ ..-. __..... ? _-._.__,._._-_____._____.._._-....___ _I__.__ __:._____, 111-113 _i _...__--._.__._.-._._._ _____..___.1 -., _. 1­11- ___ _ . __ _ _-- -____ _ ----- _ __ _ _._ TEMPORARY DIVERSION DIKE 0 TOP OF DILL TFffP0JZ4R-r FIZZ Y Compacted Soil -�-s 0 CNI Non-Erodable Liner U No. 357.91 ,�b- pin ATTACH FILTER FABRIC, o -Flow "10 FX EAU E lOR, , POSTS &EARTH. } VA, AMOW FILL aa�� ri __ f {IMAI i A1111iO r�RC1DEtV STAKE °`� :.-x0a�7AL r { F t MINdillLEND POST I g\ RID. r LENGTH 5 IuPPIV AaiIN .� NG I0 >. y I it Il�ii --- I 1i 1� 6i liiiil li#lll = SOURCE: VA.. C 3. --1 "X" DIMENSION TO RE , W K MAINTAINED TO TIE TOP OF PIPE - (in) 'A {a(�!® {i rj E10 Q10 () V'o { s) .10 00 NORMAL EARTI E(�UI7A T/C�J �lilli 1 5 0.86 0.40 6.70 6.80 2.34 2.9 0.51 EXCAVATED SOIL j 2 5 1,.59 0.40 4.00 6.80 4.32 2:8 O.T1 BACKFILLED AND ::: � MAY BE ELIMINATED UNDER EN7RANCE RIPE COPPuP�Pf'AGTE© :. ERE DIRECTED 6YENGINEEI7 3 5 9,19 0,4 0 5.10 6.80 3.24 2.9 0.6141 _ s z 8 2.85 0.40 3.50 6.00 6.84 3.1 0.86 PE?- 1 DETAIL 3.70 0.40 4,00 6.00 8.88 3.4 0.93 4'x4'° TRENCH r 6 5 1.06 0.4.0 3.50 6.80 2.88 2.5 0.62 INSTALLATION ' nr 3� x VA 3.10-1 i A01 ATs 7 5 1.18 0.40 5.50 6.80 1 3.21 3.0 0.60 T 1.15 0.40 4.50 6.3(9 2.90 2.7 0.60 SIT? SCALE r 5 1.48 0.40 6.25 6.80 4.03 3.1 0.66 SF I � N® SCALE PP u u �,« 01, t 1g, Note Coefficient o n r-o-dabl ° te due " WOODEN FRAME 0z Y X DROP INLET r a pa f CONS TRUC TION OF A SILT FENCE W TH GRA TE(WITH WIRE SUPP OR LLJ t FRAME I. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE ORE FENCING TO THE POSTS. � I• MAX. = ' TRENCH UPSLOPE ALONG THE LINE OF POSTS NATURAL GROUND RIPRAP HEAD MIALL -� GA THE'R PIPE INVERT SW TURF 8ft O.C.`"-----o. � �C�� ERS AREAS To BE DISTURBED -� � � ._....I _= (GUT, FILLED, ETC.) 3 LLJ q o FLOW_ ,O - ;i: �:_ r see.»J:`,�' •;�':aa,• �+�,q PERSPEC77VE VIEWS G.Q i„Lp f7l �2 � 20Z LEAF �� CLASS f RIPRAP p� f � I l=#! I==� 1'- I I =i 11= �- DATE ORIGINAL Y GROUND V) > "o OPTION IFILTER CLOTfi ELEV. U21U310 _ -. - - - __ $ A TT'A a^Lf TUC CW TCC'M r' A 63nW% 'rel A P!I A �r aa'"8& a m b rra sway ara a ,awr ^ay. ax•� ... --, m >• t -- -- ..__---_ ✓ / ill -i 11 - - „ ( -- _ /' / J i i ' /i ! \ ,\ ir% / `1 I r>i' 't '. ; "} i . .., I 1,/ 1 'I I/r f - .: -� - r , f r '�i - - - ____ -- __ _____! / r n, x y s l rr I t r I ­ � I .. ___.-._-nr:,"`,� . 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I 3-LT = �` / o ;... s 97fl SF cOJVSERVI7TION � 25kf i i ' t '� 1 \ i ,., J ., / / tt SEE�IN lull t. '.... % a y 1 [ a 1 g ` 3 x ' 11 i 1 �2®AN/rPV, J O.� b, i �, f` -- / f:` .. �. / fie: / r t IL'/ E �. ; . - t f 4w . _ 1 \(' / TT (- ,- I i :F- F, -.-- T % 20' UTILITY n ITY EA : v1EN . . - T i f I d �Y . ( _ •i,,'\, % / %` --.�--ram: ) I `i l }' 3 / t Z� _,ice, ` i 11 1 "r^------., 1 f ({ % _ r d \ P i' s r � 1 Re' r i~ 1 _ i ;f r A 2 PRIVATE `S N. 1 G ,r 3 t V r .i z a ,- / /I iER : EASEP�IENT I 1 , 1 r' / 7 r , f t >r i .y 1 1 f - f • r-- =n r 1 r �/ t. o f e ... 1` .. r , I ! % ! 2, -, t,,\ I t. ; l J °'�' f r/ \ , \ ' a /;, r (¢11 . 1 - �V" d tt r�, /' \ 1 , 1' ✓ I • 1 7 i' 0 / t / i t /1 / t I t X. i Y � i, i 1,b / 4 t \..... 1 ./ / , / r •� f _1.1 1.f s f f r J: .j' !r tV. t -1 t f"•. : l�. i 1 t� 7 , /- f I \ A,, t r I \ r i i 1 ✓ r C. 'i l Jj ! 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CCA ' 1 ; - Qg - f _. r 2-CV fC - - 2 SE CON �EIZVATICJN 'A - _ + r, i + ✓ _- 1 _ , 2 QA. . { SEEi�ING MIX : - __ ---- - RA' I 1" , 2 LVE 1 - g ' '�T 3 ( J , ; if , r , /-. g� , q L• j 167't 4f� - 4- �t _ _. , F' 2-CCA � � f t , I , ,: ., 42 AN P ' O, C 6 , r . `� -ILV " i, i ,a r /' - : \ a -: r `ti p)' , ` \ , . __ r>r PT r jv - ;may$ _ i __.. .� �.;�A r. i' , ` - 1 �" �` i __ t , ' A \ _ 1 I . Fs J ^`r`' r gry�//�� g�g�/ ::' , .,., �i1 SF cONSE VA ON 7 ! - 1 l " , . I \. '' 4 LI,J S8 1..L..JNSEIC Y'Tt1-46J1FP _s f�?. 'f' ...:.. .'r +, + \ .° r? t , l , - � r ;4, CDIN� MIS{ , .. t , _ - f SEE EEi�I G iv1IX - _ - - - - - - - w, ; :,� t - ' \ , . .! I _ __ __ , +. i - - - / \- :, f i+ __ , - _ +• t - - mVB� � � � , 1 . . \ ! _ - , i i -'---=--- --- - i t _ <.'111. : I 3 AAS f r� l� :.: i _ _. r - - __ 1 J .I/ , i u. I i Ii _ - t., 1 /. %. i - / 440 SF' C'ONSERVATIC N - -I 11 .F , . :. .. _ L / f { _._ x _ . ; i.J , P ITV 1IIX �. f,ltl 1, f P I /� . .... � .. 'j„/ - 11 -11. ............ i r{ 1 t' � ? � i � � �,# � � / ' 1, - , " / , .. . /. r �^ ' / (` i i �� / / , / . t i !' .. - ,^ - / I r 3-PT i • ! a' p 7 A PPS i VA R jA .; a , T \ E ' _-- f '- . \ _- ?11 1�" ' ; 1 r' / 1 `i s ` f , _ is' -G' _ t 11 i i 't 11 \ f /, / 1 \ , \ I Z . I d } , \. �- .--+- ,S 1 i ` - �' \ , r l {! , �' �'' \ F 1 , l} \ h. .,`1. \ ,, I tA \ �, il.111'.., , ' / \ 20' PRIVATE`' ->AN`"" - . \ ' s � SEWER E EMENT rgr pgg i \ \\ \ \ V11IN , / / `1 \ \ `, - _ STREAM FFER MITIGATION PLANT LIST KEY QNT`l BOTANICAL NAME _ COMMON NAME MIN. INSTALLED SIZE ROOT_ I YPE - REMARKS AAS 30 AMELANCHIER X GRANDIFLORA :AUTUMN BRILLIANCE' AU7UMN BRILLIANCE SERWCEBERRY 2' HT MIN. CONT UNIFORM/DENSE" CCA 11 CERCIS CANADENSIS EASTERN REDBUD 2' HT MiN. B&B SINGLE STEM ONLY CHV 9 CHIONAN7HUS WRGiN11CUS FRINGE TREE 2' MIN B&B MUL77PLE STEM C POC 20 CEPHA ANTHUS CI L OC DENTALJS BUTTONBUSH B 3 GAL., CONT. DEN.,E/FULL CVWK 14 CRATAEGUS VIRIDIS 'WWNTE•R KING' -- WINTER KING HAWTHORN 2' HT MIN T. CON - MULTIPLE STEM FGR 5 FAGUS GRANDIFOL lA AM RPGAN BEECH L B E s 9 - 2 3 HT B&B SiNGLE LEADER HVI 7 HAMAMELIS VIRGINIANA COMMON WITCH)__L 2' HT MIN. B&B SINGLE LEADER ILVE 49 2EX VER77CILIATA WIN7FRBERRY 2 GAL CONT. DENSE/FIdLL LST 9 - LIQUIDAMBAR STYRACIFLUA RO7UNDILOBA' - ROTUNDILOBA SWEETGUM - a 2 -3 HT s B&B -- SINGLE LEADER. LT 10 LIRIODENDRON TULIPIFERA TULIP POPLAR -� 2'-J' HT B&B SINGLE STEM ONLY PT 28 PINUS TAEDA L-OBLOLLY PINE_- 3' HEIGHT B&B SINGLE LEADER QAC 13 QUERCUS ACU77SSiMA SAWT007H OAK 2'--3HT B&B SINGLE LEADER QRA l3 QUERCUS RUBRA RED OAK 2'-.3' HT B&B SINGLE LEADER 7X D S TAXODIUM D15T7G U H M BALD R A CYPRESS 2 -3 HT B& B C N SINGLE LEADER VAC 36 VACCINIUM CORYMBOSUM HiGHBUSH BLU? BERRY 1 GAL. CONT DENSE/FULL VBDN 26 VIBURNUM DEN TA77JM ARROWWOOD W7BURNUM 3 GAL. CONT DENSE/FULL VBPR 47 VIBURNUM PRUNIFOLIUM BLACKHAW VIBURNUM 3 GAL. CONT DENSE/FULL VBTR 12 VIBURNUM TRILOBUM AME?ICAN CRANBERRY BUSH 3 GAL. CONT DENSE/FULL AN/PV 324 ANDORPOGO GERARD/ AND PANICUM WRGATU14 BIG BLUESTEM AND SWITCH GRASS 4" POT CONT 18,520 SF CONSERVA77ON SEED MIX SEE DESCRIP77ON THIS PAGE SEED PER MANUFACTURERS RECOMMENOA77ONS - . • - ' . , `,' 176,700 SF D G S77S PERENNANS GRASS SEED MIX 5 � A RO 50% FESTUCA RUBRA „ r. AUTUMN BENTGRASS RED FESCUE SEED PER MANUFACTURER'S RECOMMENDA77ONS 1. THE PLANTNGS SHALL FOLLOW THE STREAM BUFFER M177GA 17ON PLAN. 2. THE FINAL PLANT LAYOUT SHOULD RESEMBLE /A RANDOM AND NATURAL PLACEMENT OF PLANTS RATHER THAN A STANDARD LANDSCAPED APPROACH W1TH TREES iN ROWS OR OTHER ORDERLY FASHION. . J.CONTRACTOR SHALL W R T A MINIMUM OF 85% OF ALL PLANTINGS :SHALL. SURVIVE FOR A PERIOD OF ONE YEAR FOLLO NG THE WARRANT 1HA M M � Wl PLAN77NG COMPLE770N. 4. THE CONTRACTOR SHALL FURNISH NURSERY GROWN PLANTS CONFORMING TO ANSI Z601 WiTH HEALTHY ROOT SYSTEMS DEVELOPED BY G OR ROOT PRUNING. ID SHRUBS SHALL BE WELL SHAPED FULLY BRANCHED, HEALTHY VIGOROUS STOCK FREE FROM TRAN5PLANT7NTREES AND D t CTS LARVAE, SUCH AS KNOTS SUN SCALD INJURIES ABRASIONS AND DISFIGUREMENTS. DISEASE INSE L R AND DEFECTS SUC 5. NURSERY STOCK SHALL COME FROM A LOCAL NURSERY OR BE ADAPTED TO LOCAL GROWING COND177ONS AND BE GUARANTEED BY THE NURSERY AS SUCH. 6. THE CONTRACTOR SHALL CLEAN THE TOPSOIL OF ROOTS, SODS, STONES, CLAY LUMPS, AND 07HER EXTRANEOUS MATERIALS HARMFUL TO PLANT GROWTH. SET H TH THEY WERE G 0WN IN AM) THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. TREES 7 ?7-IE PLANTS SHALL BE E AT THE SAME DEP T AT E R S Y THEM FROM OVERTURNING, TO PREVENT T G AND SHRUBS SHALL BE STAKED, AS NECESSARY, H 8 L AFTER PLAN77NG THEREAFTER AS NECESSARY TO ENSURE SURVIVAL UNTIL THE END OF THE AND AL VEGETA770N SHALL BE WATERED THIS DAY A GROWING SEASON OF THE FIRST YEAR PTHROUGHOUT E ENTIRE S7REAM BUFFER Mi77GA77ON AREA EXCEPT FOR 771E 9. THE GRASS SEED Ma LISTED ABOVE SHALL BE' SPREAD 77I B , BiO-RETENTION AREAS (SEE SHEETS 6-8 FOR PLAN77NG DETAIL OF THOSE AREAS). 10. SEEDING SHALL BE CONSISTANT WITH THE SEEDING SCHEDULE SHOWN BELOW, TO BE PREPARED FOR SEEDING II'L MELWA TEL Y UPON E77ON OF THE COMP FINAL GRADING. 11. THE AREA 1S E L . THE AREA !S T r 12 Y O BE ERT7LJZED PER SPECIFICA 770N PROVIDED BY SUPPLIER 0r SEED MIX, 13. THE AREA IS TO BE SEEDED USING A HAND HELD CYCLONE" SPREADER (OR EQUIVALENT BY HAND). 14ONCE SEED HAS BEEN APPLIED, THE SEED iS T'O BE RAKED IN, TO INSURE f:00D SEED/ SOIL CONTACT . C P li' CONTRACTOR. PLANT LJ,.,T TOTALS ARE FOR L PLANT MATERIAL UANT7T?' COUNTS ON THE LAN ARE THE RESPONSIBILITY OF THE T 15, AL Q CONVENIENCE ONLY AND SHALL BE VERIFIED PRIOR TO BIDDING. 16. NO CHANGES TO PLANT SCHEDULE UNLESS FIRST APPROVED BY THE ALBEMARLE COUNTY PLANNING DEPARTMENT AND THE LANDSCAPE ARCHI7ECT. - (py�/g SEEDING SCHEDULE - CONSERVATION MI " BOTANICAL NAMES COMMON NAMES FREQUENCY FESCUE ARUNDiNACEA TALL FESCUE _j 25% I _-i PANICUM AMARUM A77-AN77C PANIC GRASS 25r. ELYMUS CANADEN iS s CAN ADIAN WILD R?`L: 72z SORGHAS7RUM NUTANS INDI AN GRASS Oy. - 7RJDENS FZAVIIS P PURPLE LE TOP 9% POA PALUSTRIS FOWL BLUEGRASS .5% LESPEDEZA 7HUNBERGII BUSH L.ESPEDEZA 3Z APOCYNUM CANNABINUM INDIAN HEMP 2`A DESMODiUM CANADENSE SHOWY 77CK TREFOIL 2 T SENNA HEBECARPA WILD SENNA 27. RHUS TYPHINA STAGHORN SUMAC 27 NT VI BURNUM LE A GO Y NANNYBERR� __ 2 ARONIA MELANOCARPA IBLACK CHOKECHERRY 1z- SEED MIX SUPPUER: ERN5T CONSERVA77ON SEEDS (800) 873--JJ21 RECOMMENDED SEEDING RATE.- 15 LBS/AC OR 1/3 - 112 LB / 1000 SOFT. N PLAN. AS DEPICTED 0 SEEDING IS TO OCCUR N STREAM BUFFER M177GA770 1. 2. SEEDING SHALL BE CONSISTANT WI7H THE SEEDING SCHEDULE SHOWN ABOVE. J. THE AREA IS TO BE PREPARED FOR SEEDING IMMEDIATELY UPON COMPLE77ON OF THE FINAL GRADING. PROVIDED BY SUPPLIER 4. THE AREA IS TO BE FER77LI.�ED PER SPECIFiCAITON PR 0 OF SEED MIX. 5. THE AREA IS TO BE SEEDED USING A HAND HELD CYCLONE" SPREADER (OR EQUIVALENT BY HAND), 6. ONCE SEED HAS BEEN APPLIED, 77-IE SEED IS TO BE RAKED IN, TO INSURE GOOD SEED SOIL CONTACT TREE PROTECT -TON NOTES K 1. ALL TREES TO BE PRESERVED AND PROTECTED SHALL BE MARKED WITH PAINT OR RIBBON AT A HEIGHT CLEARLY VISIBLE TO EQUIPMENT OPERATORS NO LAND DISTURBING ACT7ViTY SHALL BEGIN UNTIL THE TREE MARKING HAS BEEN INSTALLED BY THE CONTRACTOR AND INSPECTED AND APPROVED BY THE COUNTY ENGINEERING DEPATMENT. 2. NO LAND DISTURBING ACTIVITY DHALL BEGIN UN77L THE TREE PROTECTIVE L D INSPECTED BY THE INSTALLED 7E FENCING HAS BEEN S LED BY THE CONTRACTOR AN A COUNTY ENGINEERING DEPARTMENT J. HEAVY EQUIPMENT VEHICULAR TRAFFIC, AND THE STORAGE OF CONS7RUCRON MATERIALS AND SOIL SHALL NOT BE PERMITTED INTHIN THE OUTSIDE DRIP -LINE OF TREES TO BE PRESERVED AND PROTECTED. 4. FIRES SHALL NOT BE PERMIT7D WITHIN 100 FEET OF THE OUTSIDE DRIP -LINE OF TREES TO BE PRESERVED AND PROTECTED. 5. A 10' TREE AND SIDEWALK EASEMENT SHALL PROTECT STREET TREES PLANTED ON INDIVUiDAL LOTS. G.Lb-C-APE F_AV SCALE 50 0 25 50 100 ( IN FEET ) 1 inch = 50 ft. 200 ' 1 0� _N, � SC TT R. COLLT_NS'Z ) No. 35791 ,� A " C� lu uj w i'i U)>ko _jP, U) J co U_WCn LUr_j w Ls.i 9 1- O Go u ��IONAL ��w1 7-1 0 il. tiw Lb u U) UJI z 1.4 U) uj DATE 213106 DRAWN BY DESIGNED BY CHECKED BY SRC SCALE 1" -- 50, ON SLOPES, SUMPS N TIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE, BERM WHERE THERE IS A BERM AT THE TOP OF THE SLOPE BRING THE MATERIAL OVER THE BERM AND ANCH08 It BEHIND THE BERM W11111IRM0111", SOIL STABILIZATION MATS SHOULD BE MISTAUED VERTICALLY DOWNSLOPE FOR BEST RESULTS N-17-0-90-wa TOE .WN7AW SLOPE ANGLE mwylx*-7�1� WET LCiP ZRFA774ENT - POL'tPROPELMVE NON -WOVEN (NEEDLE 'E PUNCHED) GEOME,LIff C LOT H IND 7REA 7MV - 2) SO/L— W, 0... y - m ON P8 SSE COVEING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY F� IN DITCHES APPLY PROTECTIVE COVERING PARALLEL THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. BROCHURE 80nUM OF FILL DO77044 OF CUT SOURCE: VDOT ROAD AND BRIDGE STANDARDS 50 QM SLOPE SURFACE SHAU- BE SMOOTH AND FREE OF ROCn LUMPS OF DIM-, GRASS AND S77CKS. HAT SHALL BE PLACED RAT ON SURFACE FOR PROPER SOIL COMIACT. DIRT SHALL HE TAMPERED PRIOR 70 LAWNG 70P LAP OVS? SIRM 2' ,m. PLATE. 3.36-5 CHECA SLOT I" TO 2" VAR. -VAR. 6" TO 8" MIN. PLAN VIEW STAPLING DIAGRAM STAPLE FORMED FROM NO I I S7M WIRE CHECK SLOTS AT MIN. 8' STAPLE MIN. LENGTH FOR SANDY Solt. 50' C-C INIERVALA- 9- �.O, c —, , ml— — -- . NOT REQ.,D - WITH ALL jumcnoy SLOT -- 2"-�{I FIRMLY 6" TO 12" 12- SOURCE: VDOT ROAD AND BRIDGE STANDARDS GRAPHIC SCALE 0 25 50 100 ( IN FEET ) I inch = 50 ft. PLATE: 3.36-2 PLANTING BARE — ROOTED SEEDLINGS CARE Or Sff-DUNCS UNTIL PLANTED SEEDLINGS SHOULD BE PLANTED IMMEDIATELY. IF IT IS NECESSARY TO STORE MOSS PACKED SEEDLINGS FOR MORE THAN 2 WEEKS, ONE PINT OF WATER PER PKG. SHOULD BE ADDED. IF CLAY-7REATED DO NOT ADD WATER TO PKQ, PAqrAGQ MUST BE §MATFD TO PROYIDE vEN77IA77r))v TO PREVENT HE477NG. SEPARATE PACKAGES WITH WOOD FREEZING LOCATION. AND STORE OUT OF THE WIND IN A SHADED, COOL (NOT CARE MMO WHEN PLAN77mg, ROUTS MUST BE KEPT MOIST UNTIL TREES ARE IN TH E GROUND. 00 NOT CARRY SEEDLINGS S I rE P MOS�� YOUR hANO EXPOSED TO THE AIRADM AND SUAf. PACKED SEE SS LLE SEEDLINGS IN A CONTAINER PACKED WITH WET Mo OR F1 9 WITH THICKI MUDDY WATER. COVER CLAY -TREATED SEEDLINGS WITH WET BURLAP ONLY m wj6 i Am 6 INSERT BAR AT REMOVE BAR AND INSERT 84R 7WO PULL BAR TOWARD ANGLE SHOWN AND PLACE SEEDLING INCHES TOWARD PLANTER INC, PUSH FORW ?D 0 r0M UPRIGHT PO AT C rRECT PLANTER FROM SOIL AT 9nd7?M ,MON DEPI SEEDLING. OF ROOM PUSH BAR FORWARDrFn'Xa-jL FIRM SOIL TEST PLAN77NG FROM PLANTER HOLE BY AROUND S07 D- BY PULLING F7RMING S AT STAMPING LJNG W17H LIGHTL Y ON p TOP OF' I&S W17Y HEEL FEET SEEDLING. DON'T EXPOSE PLANT SEEDLINGS • TO AjR UPRIGHT - NO', URIN FREEZE AT AN ANGLE. OR PLANT IN FROZEN RIGHT WRONG GROUND. RIGHT WRONG DO NOT aEND ALWAYS PLANT IN ROOTS SO THAT SOIL ER THEY GROW LOOSE lfAVES UNAR OR DEaRIS. 0 IRS OUT PACK SOIL, GROUND. 77GHTL Va. DEP 200 0 !v SIC TT R. COLLINS'� No. 35791 1� (NJ CD ILI u.j 0 _j 00 - uj > LL- Ln Ll- LU Ct uj LLj CD co m: DESIGNED BY CHECKED BY SRC SCALE ill = 50' JOB NO, 22274 SHEET NO: 11 OF11