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HomeMy WebLinkAboutWPO201000036 Plan - Approved 2010-06-24a GENERAL NOTES EC -3A DITCH OWNER/DEVELOPER: MARCH MOUNTAIN PROPERTIES, LLC. COVER BEIGHTS DEVELOPMENT CORPORATION E &S NOTES AND NARRATIVE 5380 GOLF DRIVE, SUITE 103 s" CROZET, VA 22932 .....• - TELEPHONE: (434)- 823 -2003 E &S PLAN DETAILS AND COMPUTATIONS FAX: (703)- 997 -1490 ® CONTACT: MR. GAYLON BEIGHTS ENGINEER: COLLINS ENGINEERING STORMWATER MANAGEMENT CALCULATIONS 200 GARRETT STREET, SUITE K — — — — 200 — — — — CHARLOTTESVILLE, VIRGINIA 22902 200 TELEPHONE: 434.293.3719 411.3 405.0 FAX: (434)- 293 -2813 h CONTACT: MR. SCOTT COLLINS, P.E. EMAIL: SCOTT @COLLINS- ENGINEERING.COM PRE - APPLICATION CONFERENCE: SEPTEMBER 19, 2008 TAX MAP NO.: 055E- 01- 00 -000GO ZONING: NEIGHBORHOOD MODEL DISTRICT APPROVED WITH PROFFERS 9-14-05 BY ALBEMARLE COUNTY BOARD OF SUPERVISORS TOTAL ACREAGE: 0.25 ac. (WITHIN R/W) SUBDIVISION STREETS: CURB & GUTTER DRAINAGE DISTRICT: SLABTOWN BRANCH TO THE LICKINGHOLE DRAINAGE BASIN WATERSHED: LICKINGHOLE CREEK TOP &SURVEY: JENNINGS - STEPH ENSON , PC. P ROVI DED TOPOGRAPHY PROVIDED IN AUGUST 2006 AND UPDATED DECEMBER 2007 AND NOVEMBER 2008. LIGHTING: NO STREET LIGHTING IS PROPOSED. NOTE: GOLF DRIVE AND CLAREMONT LANE APPROVED UNDER WPO- 2oo8 -so65 OLD TRAIL BLOCK 4 ROAD PLANS. MINOR AMENDMENT P CURRENTLY UNDER REVIEW. n 88 Roio G`7r 10 CR ZET � e 4 <�C THIS /NcyO�F PR OJEC T Fir 84 CENTER o VILLAGE 0< O� ►-ABTOWN BRANCH ' SROWNSWLLE LJTO C RLOTTESVILLE 25 To �' Es ROCKFISH GAP M.S. TURNPIKE J. T. HENLEY BoRO RO 64 WESTERN {' ALBEMARLE] TO AFTON H.S. 250 /�TeRSTq�' 6 \�`�'gR�O�s VICINITY MAP <<F SCALE: 1" = 2500' LEGEND -- --- ----- - - ---' EXISTING CULVERT DROP INLET & STRUCTURE NO. CURB & GUTTER R27' 2T RADIUS ON F/C OLD TRAIL VILLAGE AMENDMENT TO PHASE 9 -BLOCK 13A E &S PLANS EC -3A DITCH Sheet Title s" COVER DEPTH OF EC -3A DITCH E &S NOTES AND NARRATIVE EC -2 DITCH s" DEPTH OF EC -2 DITCH .....• - EARTH DITCH E &S PLAN DETAILS AND COMPUTATIONS DRIVEWAY CULVERT ® BENCH MARK PROPOSED STORMWATER MANAGEMENT PLAN VDOT STANDARD STOP SIGN STORMWATER MANAGEMENT CALCULATIONS — — — — 200 — — — — EXISTING CONTOUR 200 PROPOSED CONTOUR 411.3 405.0 THE TOP ELEVATION DENOTES THE h PROPOSED ELEVATION OF THE RETAINING WALL & THE BOTTOM ELEVATION DENOTES THE LOWER EXPOSED PROPOSED ELEVATION OF THE RETAINING WALL. 411.3 PROPOSED SPOT ELEVATION R27' 2T RADIUS ON F/C OLD TRAIL VILLAGE AMENDMENT TO PHASE 9 -BLOCK 13A E &S PLANS 2 Z.. r 'N�\ y\ , t., 41 ° ' ( / \ l k. > r` b r t} , r t � z WPO- 2010 -36 WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGINIA § \ �•.\ // , ' E , , t 1 I s t • y ` S s TMF2 5E1 -A1 it , I MOUNT MARCH q}P / ROPERTIES 1 r' 5 380 GOLF DRIVE, SUITE 103 r \ \ TMP 55E -01. -F � -• ` PIEDMONT SENIOR' `' CROZET_VA 22932 ' i f R'LIVI N \ \ EST LLC ALE •`, 'r § \� \`\ , DB X739, P�307,^ }\ NN", ^ I✓ TM F 55E-01-51, I, ARCH MqU fV AIN M s \ POPERTI S ' r ; \ \`' 5380 CZOLF•DRIVE;`SUITE 103 e \ E f .. CROZET, VA 22932 lt, t , 9 , 11. , y , LIMITS OF THIS, P. ' StA.,:' :r• i, A 4 M. , „ .. ,, • � NNY WELL,COURT :} l PE PENNY WELL /LANE AND _._ - UPLAND DRIVE , r \ r I NT6�ll"�IN PRPER, `lE 1 s �rF -014 'j r \ \ - >�.� ,�' I \ GO 'F RIVE, SUI 10 � CP s `k \ i _........ _. ^ `i n a l �•R �'�'�.z� \.•") �' S� .' �.P.r'° <i.. J j f..' f,:,:` .�.^' f r r;. 5:,: r: \ • r j , '�'' ^';? r , / � , .!i•: Iii: :'� / i i• ..... ,..,. f / j r Iw'4I.001K 4 ti � i s (FUTURE L _t _moo r.__ t r ' H MOUNTAIN PROP TMP 55E1 Al _� MA _. ��RTIES �'` ` �' 5380 GOLF DRIVE, SUITE 103" I. �f •, ' \ \' I .... M . CROZET,-VA 22932`^, ` t } BLC BLOCK 17 r •, . ` \ TMP 55E1 -G I I ar;,r •` '` \, ,� ,, '',, " MARCH MOUNTAIN PROPERT/ IES 538 03 GOLF DRIVE SUITE BLOCK 1ra ' \ \ CROZET, VA 22932 1r `� �% \• ; ` / \� \\ 140� r I ` TMP 55E17A1 MARCH ^MOUNTAIN PROPERTIES r 5380 G ` 14 OLF DRIVE, SUITE 103, , CROZET, VA 22932',, BLOCK 11 9 tt \� Q,t S l OQ \, r r 1'. rr i � I t < r V. : 411 / it : ,.. - y , , , SHEET LAYOUT SCALE: 1" = 100' CURRENT OWNER /DEVELOPER MARCH MOUNTAIN PROPERTIES, LLC. BEIGHTS DEVELOPMENT CORPORATION 5380 GOLF DRIVE, SUITE 103 CROZET, VA 22932 PROJECT ENGINEER COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293 -3719 Sheet List Table Sheet Number Sheet Title T -1 COVER ESC -1 E &S NOTES AND NARRATIVE L EROSION AND SEDIMENT CONTROL PLAN PHASE ESC -3 EROSION AND SEDIMENT CONTROL PLAN PHASE II ESC -4 E &S PLAN DETAILS AND COMPUTATIONS SWM -1 EXISTING STORMWATER MANAGEMENT PLAN SWM -2 PROPOSED STORMWATER MANAGEMENT PLAN SWM -3 STORMWATER MANAGEMENT CALCULATIONS t` t h } `l 2 Z.. r 'N�\ y\ , t., 41 ° ' ( / \ l k. > r` b r t} , r t � z WPO- 2010 -36 WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGINIA § \ �•.\ // , ' E , , t 1 I s t • y ` S s TMF2 5E1 -A1 it , I MOUNT MARCH q}P / ROPERTIES 1 r' 5 380 GOLF DRIVE, SUITE 103 r \ \ TMP 55E -01. -F � -• ` PIEDMONT SENIOR' `' CROZET_VA 22932 ' i f R'LIVI N \ \ EST LLC ALE •`, 'r § \� \`\ , DB X739, P�307,^ }\ NN", ^ I✓ TM F 55E-01-51, I, ARCH MqU fV AIN M s \ POPERTI S ' r ; \ \`' 5380 CZOLF•DRIVE;`SUITE 103 e \ E f .. CROZET, VA 22932 lt, t , 9 , 11. , y , LIMITS OF THIS, P. ' StA.,:' :r• i, A 4 M. , „ .. ,, • � NNY WELL,COURT :} l PE PENNY WELL /LANE AND _._ - UPLAND DRIVE , r \ r I NT6�ll"�IN PRPER, `lE 1 s �rF -014 'j r \ \ - >�.� ,�' I \ GO 'F RIVE, SUI 10 � CP s `k \ i _........ _. ^ `i n a l �•R �'�'�.z� \.•") �' S� .' �.P.r'° <i.. J j f..' f,:,:` .�.^' f r r;. 5:,: r: \ • r j , '�'' ^';? r , / � , .!i•: Iii: :'� / i i• ..... ,..,. f / j r Iw'4I.001K 4 ti � i s (FUTURE L _t _moo r.__ t r ' H MOUNTAIN PROP TMP 55E1 Al _� MA _. ��RTIES �'` ` �' 5380 GOLF DRIVE, SUITE 103" I. �f •, ' \ \' I .... M . CROZET,-VA 22932`^, ` t } BLC BLOCK 17 r •, . ` \ TMP 55E1 -G I I ar;,r •` '` \, ,� ,, '',, " MARCH MOUNTAIN PROPERT/ IES 538 03 GOLF DRIVE SUITE BLOCK 1ra ' \ \ CROZET, VA 22932 1r `� �% \• ; ` / \� \\ 140� r I ` TMP 55E17A1 MARCH ^MOUNTAIN PROPERTIES r 5380 G ` 14 OLF DRIVE, SUITE 103, , CROZET, VA 22932',, BLOCK 11 9 tt \� Q,t S l OQ \, r r 1'. rr i � I t < r V. : 411 / it : ,.. - y , , , SHEET LAYOUT SCALE: 1" = 100' CURRENT OWNER /DEVELOPER MARCH MOUNTAIN PROPERTIES, LLC. BEIGHTS DEVELOPMENT CORPORATION 5380 GOLF DRIVE, SUITE 103 CROZET, VA 22932 PROJECT ENGINEER COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293 -3719 Sheet List Table Sheet Number Sheet Title T -1 COVER ESC -1 E &S NOTES AND NARRATIVE ESC -2 EROSION AND SEDIMENT CONTROL PLAN PHASE ESC -3 EROSION AND SEDIMENT CONTROL PLAN PHASE II ESC -4 E &S PLAN DETAILS AND COMPUTATIONS SWM -1 EXISTING STORMWATER MANAGEMENT PLAN SWM -2 PROPOSED STORMWATER MANAGEMENT PLAN SWM -3 STORMWATER MANAGEMENT CALCULATIONS APPROVEO by the - Albemarle County Cen'Itnunit Develu��K Tani Department D8 I Z be? i 0 TAX MAP /ZONING INFORMATION TAX MAP:055E- 01- 00 -000GO ZONED: NMD APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER /ZONING ENGINEER ` INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIA DEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT COLLINS ENGINEERING IS NOT RESPONSIBLE OR LIABLE FOR ANY CONSTRUCTION OR DAMAGES TO THIS PROJECT PRIOR TO ALL FINAL PLAN APPROVALS. O � SCOTT R. COLLINSZ Lic. No. 035791,2 ZONAL E� z Q J CL H Z w ® D (n O IM4 H h-1 H H, z w W ce c) w 0 � LEGEND ROADS - 0 TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application -H Test of AgdCal�mestone below 4,2 3 tuns per acre 4.2 to 5.2 2 tons per acre 52 to 6 1 ton per acre MP 774E ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING EROSION & SEDIMENT CONTROL EROSION CONTROL NOTES WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND MEASURES: TO BE APPLIED AT 80LBS1100SF. ALTERNA71VES ARE SUBJECT TO APPROVAL BY THE EXISTING CULVERT STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE EROSION CONTROL NOTES CULVERT WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL alr MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE . PRACTICES USED IN THIS SEC77ON CONSIST OF THE FOLLOWING: ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETA77VE AND STRUCTURAL EROSION DROP INLET & STRUCTURE NO. 312 DIVERSION: AND SEDIMENT CONTROL PRAC7ICES WILL BE CONSTRUCTED AND CURB J.01 SAFETY FENCE. A PR07FC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF VIRGINIA CURB &GUTTER 1B T THE UNDESIRABLE USE O A EROSION TO PROHIBIT F N I E OSI O CON7ROL MEASURE THE PUBLIC. 774E EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULAT70NS VR 625 -02 -00 EROSION AND SEDIMENT CONTROL LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWA TER APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED I REGULA7TONS , UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC. I J. PROPOSED PAVEMENT ST 000W.8%040 TEMPORARY SEDIMENT TRAP 3.13 ES -2: THE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO f 3-02 CONSMU077ON ENTRANCE: THE PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO 7HE EC -3A DITCH A STABILIZED PAVED CONS MUC77ON ENTRANCE WITH A WASH. RACK LOCATED AT POINTS OF COMMENCEMENT OF LAND DIS77JRBING AC77WTY, AND ONE WEEK PRIOR TO 8 � SEDIMENT BASIN 3.14 VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE 7HE AMOUNT OF THE FINAL INSPECTION. DEPTH OF EC -3A DITCH MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. ES -J.ALL EROSION AND SEDIMENT CON7ROL MEASURES ARE TO BE PLACED PRIOR SUITABLE MA7ERIALS TO 77-IE SOIL SURFACE. TO APPUCA77ON OF PLANT RESIDUES PREVENT EROSION BY PR07EC77NGO7HE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING CONS7RUC770N ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE TO OR AS 774E FIRST STEP IN CLEARING. EC -2 DITCH AMOUNT SEDIMENT 7RANSPORTED ONTO PUBLIC ROADWAYS ES-4.A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL AVAILABLE A401STURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IbIME01A7ELY FOLLOWING . BE MAINTAINED ON THE SI7E AT ALL TIMES. TO THE OWNER FOR REVIEW AND APPROVAL BY 774E PLAN APPROVING AUTHORITY. 3.05 SILT FENCE, ES -5: PRIOR TO COMMENCING LAND DISTURBING AC77VI77ES IN AREAS 077-IER THAN DEPTH OF EC -2 DITCH A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYN1HE77C FILTER FABRIC S7RETCHED INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF-S17E EARTH DITCH ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO 1N7ERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUC77ON OPERATIONS IN BORROW OR WASTE AREAS), THE CON7RACTOR SHALL SUBMIT A (sotada Ita W ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND DRIVEWAY CULVERT SHEET FLOWS AND LOW -TO- MODERATE LEVEL CHANNEL FLOWS, 774E SILT FENCE BARRIERS APPROVAL BY THE PLAN APPROVING AUTHORITY. 7 SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT ES -6: THE CON7RACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADD177ONAL BENCH MARK LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND OCD , CHECK DAM 320 AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WI7H 774E VIRGINIA EROSION & SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AUTHORITY. CLEARING LIMITS SEDIMENT CON7ROL HANDBOOK (VESCH). ES- 7•ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON7ROL 9. 774E CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND MEASURES AT ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING LONG ENOUGH FOR 7HE MAJORITY OF 774E SEDIMENT TO SETTLE OUT APPLIES BELOW 3.07 STORM DRAIN INLET PR07EC770N.L SITE DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. VDOT STANDARD STOP SIGN A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP ES-8. DURING DEW4 7ERING OPERATIONS, WATER WILL BE PUMPED INTO AN CLEANUP TO MAINTAIN 7HE EFFEC77VENESS OF THE EROSION CON7ROL DEVICES SHALL BE MADE IMMEDIATELY. INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS APPROVED WATER FILTERING DEVICE. EXISTING CONTOUR PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07EC-RON APPLIES ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES TOPOGRAPHY FOR 774E CONSMUC770N OF A TEMPORARY IMPOUNDMENT. WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BEFORE PERMANENT PERIODICALLY AND AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT. PROPOSED CONTOUR STABILIZATION OF 774E CORRESPONDING DISTURBED DRAINAGE AREA. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE ,AREA. EARTH FILL 3.09 TEMPORARY DIVERSION DIKE_ OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. PROPOSED SPOT ELEVATION TBC DENOTES TOP /BACK OF CURB A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING 7HE EROSION CON7ROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPS7REAM AREAS ARE STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM OTHER DEBRIS. TAB DENOTES TOP OF BOX UNPROTE"CTE"D DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT 12. TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application -H Test of AgdCal�mestone below 4,2 3 tuns per acre 4.2 to 5.2 2 tons per acre 52 to 6 1 ton per acre MP 774E ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT- TRAPPING FACILITY SUCH EROSION CONTROL NOTES WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMW47ER RUNOFF MUST BE TO BE APPLIED AT 80LBS1100SF. ALTERNA71VES ARE SUBJECT TO APPROVAL BY THE SEDIMENTA7ION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL EROSION CONTROL EROSION & SEDIMENT NUMBER CON7ROL S17E DURING G DIVERTED R ESE DISTURBED UCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 1• THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO 774E alr MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE . Z37 TREES, SHRUBS. VINES GROUND COVERS. • CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND ST STRAW BAIL BARRIER 3.04 312 DIVERSION: 2. DISTURBING DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND VINES, OR GROUND COVERS. TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER A CHANNEL CONSTRUCTED ACROSS A SLOPE WI7H A SUPPOR77NG EARTHEN RIDGE ON THE Rate ftu"Dglo des (11MIacre) MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF 774E VIRGINIA DD DV TEMPORARY DIVERSION DIKE 3.09 08 LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWA TER HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625 -02 -00 EROSION AND SEDIMENT CONTROL REGULATIONS, , RUNOFF TO STABILIZED OUTLETS AT NON - EROSIVE VELOCl77ES APPLIES WHERE RUNOFF FROM AREAS OF HIGHER ELEVA7ON MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WI774 J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS ST 000W.8%040 TEMPORARY SEDIMENT TRAP 3.13 THE ESTABLISHMENT OF VEGETA77ON ON LOWER AREAS, WHERE SURFACE AND /OR SHALLOW 4. IHE FIRST STEP IN CLEARING A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE NEED 7HA77ON, NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. R. SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO 21. MAINTAINED ON THE S17E" AT ALL TIMES 8 � SEDIMENT BASIN 3.14 BE REDUCED TO MINIMIZE SOIL LOSS 1 5. PRIOR TO COMMENCING LAND DISTURBING AC77W77ES IN AREAS 07HER THAN INDICATED DISTURBING AND CONS7RUC77ON AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES J 13 TEMPORARY SEDIMENT WRAP: SUITABLE MA7ERIALS TO 77-IE SOIL SURFACE. TO APPUCA77ON OF PLANT RESIDUES PREVENT EROSION BY PR07EC77NGO7HE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -S17F BORROW OR WASTE lP - -� ---- INLET PR07EC77ON 3.07 A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A PRO7EC770N, LANDSCAPE BEAU77RCA77ON, DUST AND POLLUTION CONTROL, NOISE REDUCTION, AREAS), 774E CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN AVAILABLE A401STURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IbIME01A7ELY FOLLOWING STONE OUTLET. TO DETAIN SEDIMENT - LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG -DYKE- SILT LOAM- 27. TO 79 SLOPES THIS SOIL IS DEEP, GENTLY TO THE OWNER FOR REVIEW AND APPROVAL BY 774E PLAN APPROVING AUTHORITY. FOREST TO URBAN -TYPE USES APPLIES IN 7REE- INHAB17ED AREAS SUBJECT TO LAND ENOUGH TO ALLOW 774E MAJORITY OF 174E SEDIMENT TO SETTLE OUT USE BELOW DISTURBED 6. 7HE CONTRACTOR IS RESPONSIBLE FOR INSTALLA71ON OF ANY ADD177ONAL EROSION SF SILT FENCE 3.05 AREAS WHERE 774E TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE 174E SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS (sotada Ita W SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAYBE CONSTRUCTED DUE TO AN INCREASE IN QUANTITY AND VELOCITY OF THE RUN -OFF. THE DE7ERMINED BY 774E PLAN APPROVING AUTHORITY. CE -� CONSTRUCTION ENTRANCE 3.02 0 EITHER INDEPENDENTLY OR IN CONJUNC7ION WITH A TEMPORARY DIVERSION DIKE. 7 ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL 77MES DURING LAND DISTURBING AC77W77ES AND DURING SITE DEVELOPMENT UN77L AND PARKING LOT HOWEVER, MUCH OF THE RUN -OFT' IS BEING DIVERTED TO AN 314 TEMPORARY SEDIMENT BASIN, PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. FINAL STABILIZA7ON IS ACHIEVED. OCD , CHECK DAM 320 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSMUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRA/NAGEWAY & DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH 774E TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY- STORAGE 9. 774E CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND & PERMANENT OR TEMPORARY SOIL STABILIZA7ON SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN LONG ENOUGH FOR 7HE MAJORITY OF 774E SEDIMENT TO SETTLE OUT APPLIES BELOW DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE 7EMPORARY SOIL STABILIZA7ON AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT ANY NECESSARY REPAIRS OR OFD TEMPORARY FILL DIVERSION 3.10 V DISTURBED AREAS WHERE THE TOTAL CONMIBUT7NG DRAINAGE AREA IS EQUAL TO OR REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE CLEANUP TO MAINTAIN 7HE EFFEC77VENESS OF THE EROSION CON7ROL DEVICES SHALL BE MADE IMMEDIATELY. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. GREATER THAN THREE ACRES THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE II EROSION . REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL17ION AND CONTROL PLAN. INSTALL STORM SEWER FOR THE PROJECT, USING INTERMEDIATE INLET PR07EC77ON TO TOPOGRAPHY FOR 774E CONSMUC770N OF A TEMPORARY IMPOUNDMENT. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FER77LIZED THE DENUDED AREAS INSTALL INLETS TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE ,AREA. EARTH FILL DV DIVERSION 3.12 Z18 OUTLET PROTECRON.' 12. ONCE 774E S 17E IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD„ RUBBISH, AND 7HE EROSION CON7ROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPS7REAM AREAS ARE STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED STABILIZED AND THE INSPECTOR GIVES PERMISSION OTHER DEBRIS. 12. MAINTAIN ALL EROSION CON7ROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER S L __-- PS PERMANENT SEEDING 3.32 STORMWA TER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE 774E P07ENTIAL 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER ZONING ORDINANCE SEC77ON 5.1.28. FINAL SITE STABILIZA7ON OR AFTER THE 7EMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS FOR DOWNSTREAM EROSION BY REDUCING 774E VELOCITY AND ENERGY OF CONCENTRATED 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SEC77ON 13 -301 SOIL AREAS RESUL 77NG FROM 774E DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STORM WATER FLOWS. APPLICABLE TO 774E OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTA770N.. OF 774E CODE OF ALBEMARLE. TD TO TOPSOILING 3.30 SECTIONS. 14. BORROW, FILL OR WA57E AC77WTY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT l,. STORM DRAIN INLET PROTECTION. `'�I -- SHALL BE LIMI TED TO 774E HOURS OF 7: 00 AM TO 9: 00 PM. 0 CULVERT INLET PROTECTION 3.08 J. 19 RIERAP: A PERMANENT, EROSION- RESISTANT GROUND ;;OVER OF LARGE, LOOSE, ANGULAR STONE WITH 15. BORROW, FILL OR WASTE AC77WTY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, TEMPORARY SEEDING.' FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM THE EROSIVE ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMEN75; AND DAMAGE TO ANY . TIME SHALL BE SEEDED WITH FAST GERMINA 77NG TEMPORARY VEGETATION FORCE OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENMATED RUNOFF WHILE IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL PUBLIC S7REET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. DC DC DUST CON7ROL 3.39 ENHANCING 7HE POTENTIAL FOR INFILMA77ON, AND TO STABILIZE SLOPES Wl7H SEEPAGE 16. THE DEVELOPER SHALL RESERVE 774E RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMW47FR MANAGEMENT FACILITIES WHERE APPLICABLE ALL PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE PROBLEMS, AND /OR NON- COHESIVE SOILS. USE WHEREVER SOIL AND WATER 1N7FRFACE AND CONDITIONS FROM TABLES 3.318 AND 3-31C. NOTE THAT TABLE 3.31 B PRESENTS A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA TER RELEASE S77?UC7URES WHICH IS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE THE SOIL CONDI770NS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., CONDITIONS; TABLE. 3.31C PRESENTS MORE IN -DEPTH INFORMATION ON THE EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF PLANT MATERIALS ARE SUCH THAT THE SOIL MAY ERODE UNDER 774E DESIGN FLOW CONDITIONS TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO ANY LOT, UNIT, BUILDING OR OTHER POR77ON OF THE PROPERTY. @ I `- `--` -i TEMPORARY SLOPE DRAIN J. 15 EFFEC77VE LIFE IS 18 MON7HS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED 17 TEMPORARY STABILIZA7ON SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY ;20 ROCK CHECK DAMS• FOR TEMPORARY SEEDING, TABLE 3.31A MAY BE USED TO DE7ERMINE 774E TO BE AT 75 LBS /ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO AC7UAL NEED ALONG WITH SUGGESTED APPLICATION RATES: SMALL TEMPORARY STONE DAMS CONS7RUC7ED ACROSS A SWALE OR DRAINAGE DITCH. TO CONSIST A 50150 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH SA a SAFETY FENCE 3.01 REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRAC77CE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY 7HROUGH AUGUST TO CONSIST OF GERMAN MILLET. S7RAW MULCH IS TO BE APPLIED AT 80LBS1100SF. AL7ERNA77VES ARE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. AREAS OR 774E DITCH ITSELF, MAINLY BY PONDING OF THE STORMWA TER RUNOFF. THIS IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. . ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR PRAC77CE, U77LIZING A COMBINA77ON OF STONE SIZES, IS UM17ED TO USE IN SMALL OPEN 18. PERMANENT STABILIZATON SHALL BE LIME AND. FER77L1ZER, PERMANENT SEEDING, AND RW TEMPORARY RIGHT -OF -WAY 3.11 CHANNELS WHICH DRAIN 10 ACRES OR LESS EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS /1000SF, DIVERSION PERMANENT STAOUIZA PLANT GROWTH AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING. INCORPORATED INTO 174E TOP 4 -6 INCHES OF SOIL. FER77LIZER SHALL BE APPLIED AT SEED SHALL BE EVENLY APPLIED_ WITH A BROADCAST SEEDER, DRILL, 31 7E ORARY SEEDING• CUL77PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO 1000LBS /ACRE AND CONSIST OF A 10 -20 -10 NUTRIENT MIX. PERMANENT SEEDING TABLE 3.31 -A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application -H Test of AgdCal�mestone below 4,2 3 tuns per acre 4.2 to 5.2 2 tons per acre 52 to 6 1 ton per acre MP 774E ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF 774E SEASON SHOULD BE MULCHED SHALL BE APPLIED AT 180LBS /ACRE AND CONSIST OF 959 KENTUCKY 31 OR TALL FESCUE AND 0 -5% PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS, STRAW MULCH IS WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER W1774 PLAN77NGS OF TREES, SHRUBS, TO BE APPLIED AT 80LBS1100SF. ALTERNA71VES ARE SUBJECT TO APPROVAL BY THE SEDIMENTA7ION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZA7ON BY EROSION CONTROL INSPECTOR. GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND 19. MAINTENANCE. ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS Z37 TREES, SHRUBS. VINES GROUND COVERS. • RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED EXPOSED DURING CONS7RUC77ON UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL _& STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA77VE COVER WITH TREES, SHRUBS, IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 509 OF THE WET STORAGE MEASURES CAN BE ESTABLISHED. VINES, OR GROUND COVERS. TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER VOLUME IS FILLED W17H SEDIMENT ALL SEEDED AREAS ARE TO BE RESEEDED WHEN Rate ftu"Dglo des (11MIacre) THAN 77JRF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE NECESSARY TO ACHIEVE A GOOD STAND OF GRASS SILT FENCE AND DIVERSION DYKES J.J2 PERMANENT STABILIZA710N: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON WHICH ARE COLLEC77NG SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIA TEL Y. SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR WHEN MEASURES ARE LONGER 30 DAYS OF FINAL SITE SBY S17E" CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE' PLANT MATERIALS TO SOIL CONSERVA770N, OR TO ESTABLISH WILDLIFE HABITAT. NEED 7HA77ON, NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. R. IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE110N OF 21. THE E &S INSPECTOR HAS THE AS OND1 TO ADD OR DELETE E &S CONTROLS CONSIRUC77ON AC77W77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. PRO EC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND NECESSARY IN 174E FIELD AS SITE CONDl710NS CHANGE. !N ADDITION, NO SEDIMENT SITE M 3.35 MULCHING. DISTURBING AND CONS7RUC77ON AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES BASIN OR TRAP CAN BE REMOVED WI7HOUT WRITTEN AUTHORIZA77ON, SUITABLE MA7ERIALS TO 77-IE SOIL SURFACE. TO APPUCA77ON OF PLANT RESIDUES PREVENT EROSION BY PR07EC77NGO7HE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING SOIL DESCRIPTION E VELOCITY OF OVERLAND FLOW. TO FOSTER 774E GROWTH F TH LOC 0 VEGETATION BY INCREASING PRO7EC770N, LANDSCAPE BEAU77RCA77ON, DUST AND POLLUTION CONTROL, NOISE REDUCTION, ' AVAILABLE A401STURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IbIME01A7ELY FOLLOWING 25B -DYKE- SILT LOAM- 27. TO 79 SLOPES THIS SOIL IS DEEP, GENTLY DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL ' NOTES & NARRATIVE CONTROL MEASURES. SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF 774E SEASON SHOULD BE MULCHED SLOPING, WELL DRAINED SOIL ON BROAD, CONVEX FOOT SLOPES AND COLLUVIAL FANS S LOPES ARE SMOOTH AND ABOUT 300 TO 1000 FEET THE PURPOSE OF THIS LAND DISTURBING AC77VITY /S TO CONSTRUCT THE ROADS, ALLEYS AND ASSOC /A 7FD USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER W1774 PLAN77NGS OF TREES, SHRUBS, LONG. AREAS THIS SOIL ARE LONG AND WIDE. THEY RANGE FROM 5 TABLE 331.11 OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZA7ON BY C TO ABOUT 30 ACRES. 774E SURFACE LAYER OF THIS SOIL IS DARK DA ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING. REDDISH BROWN SILT LOAM ABOUT 8 INCHES THICK. PERMEABILITY AND AND STORED FOR LATER SPREADING. STOCKPILE LOCA77ONS SHALL BE ON SITE AND SHALL BE Z37 TREES, SHRUBS. VINES GROUND COVERS. • AVAILABLE WATER CAPACITY ARE MODERATE: SURFACE RUNOFF IS "QUICK P"ERENCE FOR ALL REGIONS' _& STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA77VE COVER WITH TREES, SHRUBS, MEDIUM. THE HAZARD OF EROSION IS MODERATE 774lS SOIL HAS GOOD CEASED. PERMANENT SEEDING SHALL ALSO BE'PERFORMED FOR ALL DENUDED AREAS WHICH WILL VINES, OR GROUND COVERS. TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER 77L 7H. Rate ftu"Dglo des (11MIacre) THAN 77JRF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE 37D3 - HA YESVILLE -CLA Y LOAM -15% TO 259 SLOPES, SEVERELY ERODED. THIS 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON SOIL IS DEEP, WELL DRAINED, AND MODERATELY STEEP. IT IS ON SIDE NO OFFS17E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF S7EEP OR ROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE ORNAMENTALS ARE SLOPES THAT BORDER SMALL DRAINAGE&Y5 SLOPES ARE SMOOTH AND Sept. 1 - Feb. 15 50150 Mix of DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR ABOUT 200 TO 400 FEET LONG. AREAS OF THIS SOIL ARE LONG AND Annual Ryegram SOIL CONSERVA770N, OR TO ESTABLISH WILDLIFE HABITAT. WINDING. THEY RANGE FROM 3 TO ABOUT 20 ACRES. (Lolium 50 - 1114 3.3,6 TREE PRESERVATION AND PROTECTION 26C3 -DYKE -CLAY LOAM -79 TO 15X SLOPES, SEVERELY ERODED. THIS DEEP . Cereal (Winter) Rye PRO EC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND STRONGLY STRONGLY SLOPING, WELL DRAINED SOIL IS ON CONVEX SIDE SLOPES OF X S AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS DISTURBING AND CONS7RUC77ON AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES FANS SLOPES ARE SMOOTH AND ABOUT TO 400 FEET 2 NO EROSION CON7ROL MEASURES MAY REMOVED DURING THE CONSTRUCTION PROCESS W17HOUT 7HE WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CON7ROL, WATERSHED LONG. AREAS OF THIS SOIL ARE LONG AND NARROW. THEY RANGE FROM Feb. 16 - Apr. 30 Annual Ryagrm 6,0.140 PRO7EC770N, LANDSCAPE BEAU77RCA77ON, DUST AND POLLUTION CONTROL, NOISE REDUCTION, 5 TO ABOUT 30 ACRES. ENTRANCES TO BE INSTALLED WHERE CONS7RUC77ON VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO ,. (LSflullt�.[elaiti ilarum) FOREST TO URBAN -TYPE USES APPLIES IN 7REE- INHAB17ED AREAS SUBJECT TO LAND LOW -TO- MODERATE LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN BE CLEANED THOROUGHLY AT 7HE ENO OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY DIS7URBING AC77W77ES STORMWA TER RUN --OFF CONSIDERA TIONS• May 1 - Aug 31 German Millet 50 SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. CONSTRUCTION OF 77-IIS PROJECT WILL HAVE AN EFFECT ON PEAK RUN -OFF RA7ES (sotada Ita W 3.39 DUST CONTROL.: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND DUE TO AN INCREASE IN QUANTITY AND VELOCITY OF THE RUN -OFF. THE 774E ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PI- AN77NG SEED. CONSTRUCTION AC77W77ES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM IMPERVIOUS AREA IS BEING INCREASED DUE TO 774E CONS7RUC7ION OF 174E ROADS DISTURBANCE TAKES PLACE. EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY AND PARKING LOT HOWEVER, MUCH OF THE RUN -OFT' IS BEING DIVERTED TO AN Source: VILDsNVC I PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. EXIS77NG SEDIMENT BASIN, WHICH WILL ASSIST IN DECREASING THE RUN -OFF AND 774E INSPECTOR HAS APPROVED 774E EROSION CONTROL MEASURES, 774E CONTRACTOR CAN BEGIN DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF VELOCITY FROM 774E PROJECT SITE A CONTRIBUTION TO THE PRO -RATA SHARE TEMPORARY SEEDING: DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH 774E PROGRAM WILL ALSO BE MADE. Z ROUGH GRADE THE SITE TO 774E CONTOURS SHOWN ON 174E PHASE Il EROSION CON7ROL PLAN. VESCH. & PERMANENT OR TEMPORARY SOIL STABILIZA7ON SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL ' NOTES & NARRATIVE CONTROL MEASURES. PURPOSE.•' EROSION AND SEDIMENT CONTROL MEASURES' THE PURPOSE OF THIS LAND DISTURBING AC77VITY /S TO CONSTRUCT THE ROADS, ALLEYS AND ASSOC /A 7FD IT IS ANTICIPATED TO USE CONSTRUC770N ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS, DRAINAGE STRUCTURES FOR BLOCK 13, PHASE A AT OLD TRAIL VILLAGE. INFRASTRUCTURE WILL 77E-IN WITH AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. 7EMPORARY SEEDING WILL EXISTING FACIL.177ES AND FACIL177ES CURREN7LY UNDER CONSTRUC77ON FOR BLOCK 4 TO 7HE WEST OF 77-IIS BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE AC)7VI77ES TEMPORARY STOCKPILE SITE. THE TOTAL AREA TO BE DISTURBED WI774 THIS PHASE OF DEVELOPMENT IS 8.12 ACRES. AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED EXIS77NG S17F_ COMMONS: AND STORED FOR LATER SPREADING. STOCKPILE LOCA77ONS SHALL BE ON SITE AND SHALL BE THIS S17E CONSISTS OF AN OPEN GRASS FIELD WITH NO VEGETATION, SLOPING DOWNWARD TO THE EAST. THE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR SITE IS LOCATED TO THE EAST OF OLD TRAIL DRIVE, AND DRAINS TO SLABTOWN CREEK. T AREAS• ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSMUC77ON AC77W77ES HAVE S CEN THIS SITE IS BORDERED TO 7HE NORTH BY THE FUTURE PIEDMONT RE77REMENT FACILITY IN BLOCK 2 TO THE CEASED. PERMANENT SEEDING SHALL ALSO BE'PERFORMED FOR ALL DENUDED AREAS WHICH WILL EAST IS FUTURE UNDEVELOPED MIXED -USE BLOCKS RESIDENTIAL AND MIXED -USE DEVELOPMENTS ARE BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME AN77CIPATED IN THE FUTURE DEVELOPMENT OF BLOCK 4 TO THE WEST AND BLOCK 14 TO THE SOUTH. OLD OF YEAR APPLIED. TRAIL DRIVE EXISTS TO 7HE WEST: 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT OFF-S17E LANppjS, TURBANCE.' FOR MORE THAN SEVEN DAYS THESE AREAS SHALL BE SEEDED WI114 FAST GERMINATING NO OFFS17E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF VEGETA77ON IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DISTURBANCE AS SHOWN. DEPEND ON 774E 77ME OF YEAR APPLIED. CRI77CAL AREAS.• CONS7RUC7I0N ENMANCE.' THERE ARE NO CRI77CAL AREAS LOCATED W17HIN THE PROJECT LIMITS A STABILIZED PAVED CONS7RUC77ON ENTRANCE W/ 7H A WASH RACK LOCATED AT POINTS OF SOILS-: VEHICULAR INGRESS AND EGRESS ON A C0NS7RUC77ON SITE. TO REDUCE 774E AMOUNT OF MUD SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS WITH SOILS DATA INCLUDED WITH THIS TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. NARRA77VE. CONS7RUC170N ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 774E SEQUENCE F CONSTRUCTION• ,� 0 ti,,, AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS7RUCT7ON MEE77NG AS REQUIRED. SILT FENCE: 2 NO EROSION CON7ROL MEASURES MAY REMOVED DURING THE CONSTRUCTION PROCESS W17HOUT 7HE A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SMTHE770 FILTER FABRIC STRETCHED ACROSS APPROVAL FROM THE INSPECTOR ON 774E PROJECT. AND ATTACHED TO SUPPOR71NG POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL J. INSTALL THE PAVED CONS7RUCT70N ENTRANCE WI7H WASH AREA AS SHOWN ON THE PLANS. CONS7RUCT70N ENTRANCES TO BE INSTALLED WHERE CONS7RUC77ON VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET FLOWS AND THE PAVED .SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL LOW -TO- MODERATE LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN BE CLEANED THOROUGHLY AT 7HE ENO OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS SHOVELING OR SWEEPING AND 7RANSPOR77NG TO A SEDIMENT CON7ROL DISPOSAL AREA. S7REET WASHING INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AF7ER EACH RAINFALL AND MAINTAINED IN SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 4. INSTALL THE 1NI77AL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CON7ROL SHEET. THIS PERMANENT STQS/L {ZA TTON INCLUDES SILT FENCE. MEASURES /N7ENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP 774E ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PI- AN77NG SEED. W17H ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANEN7LY DISTURBANCE TAKES PLACE. STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S 17E CON0I77ONS, 5. IN ADDITION TO ENSURING THAT 774E PAVED CONSTRUCTION EN7RANCE IS INSTALLED, INSTALL ANY AND ALLOWS SELEC7ION OF 77-IE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE EROSION CONTROL PLAN. 6. ONCE ALL 774E EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONSMUC770N AC77W77ES, ALL AND 774E INSPECTOR HAS APPROVED 774E EROSION CONTROL MEASURES, 774E CONTRACTOR CAN BEGIN AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS TEMPORARY SEEDING: DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLA77ON. THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DIS7URBED AREAS BY SEEDING WITH Z ROUGH GRADE THE SITE TO 774E CONTOURS SHOWN ON 174E PHASE Il EROSION CON7ROL PLAN. APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDIMENTA77ON BY & PERMANENT OR TEMPORARY SOIL STABILIZA7ON SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN STABILIZING- DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE 7EMPORARY SOIL STABILIZA7ON MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL OFF -5I7E AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSMUC770N REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE UN77L PERMANENT VEGETA77ON OR OTHER EROSION CON7ROL MEASURES CAN BE ESTABLISHED. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. DUST CONTROL: 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE II EROSION . REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL17ION AND CONTROL PLAN. INSTALL STORM SEWER FOR THE PROJECT, USING INTERMEDIATE INLET PR07EC77ON TO PROTECT 774E END OF THE PIPES CONSTRUCTION AC77W77ES 10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FER77LIZED THE DENUDED AREAS INSTALL INLETS TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE AND INSTALL INLET PR07EC77ON AS SHOWN ON THE PLANS 174E PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY 11. INSTALL STONE BASE AND PAVE ROADS PROBLEMS OR HARM ANIMAL OR PLANT LIFE 12. ONCE 774E S 17E IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF 7HE EROSION CON7ROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPS7REAM AREAS ARE DUST DURING CONS7RUC770N. MEASURES EMPLOYED SHALL BE IN ACCORDANCE Wl7H THE VESCH. STABILIZED AND THE INSPECTOR GIVES PERMISSION TEMPORARY DIVERSION DIKE: 12. MAINTAIN ALL EROSION CON7ROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT A RIDGE OF COMPACTED SOIL CONSTRUCTED AT 174E TOP OR BASE OF A SLOPING DISTURBED AREA CO1V7R0L HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN WHICH DIVERTS OFF -SITE RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET, ACCORDANCE W7774 THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE MAXIMUM FINAL SITE STABILIZA7ON OR AFTER THE 7EMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS EFFECTIVE LIVE IS 18 MONTHS 07HERMSE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DIS77JRBED ROCK CHECK DAMS-• SOIL AREAS RESUL 77NG FROM 774E DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY SMALL, TEMPORARY STONE DAMS CONSTRUC7ED ACROSS A DRAINAGE DITCH TO REDUCE 774E STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTA770N.. VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF 7HE SWALE OR DITCH. LIM17ED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS; SHOULD NOT BE USED IN LIVE . STREAMS l,. STORM DRAIN INLET PROTECTION. `'�I -- 774E INSTALLA77ON OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZA770N OF THE DISTURBED AREA; UMITED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE, TEMPORARY SEEDING.' CONCENTRATED STORMWA7ER FLOWS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF TEMP-006 Y sEDIMENT TRAP: . TIME SHALL BE SEEDED WITH FAST GERMINA 77NG TEMPORARY VEGETATION A SMALL PONDING AREA, FORMED BY CONSIRUC77NG AN EARTHEN EMBANKMENT WITH A STONE IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DIS7URBED DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT AREAS FOR ENOUGH 77ME TO ALLOW MOST TO 774E SUSPENDED SOLIDS TO SE77LE OUT MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS. EFFECTIVE LIFE IS 18 MONTHS. PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE TEMPORARY SEDIMENT BASIN: CONDITIONS FROM TABLES 3.318 AND 3-31C. NOTE THAT TABLE 3.31 B PRESENTS A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA TER RELEASE S77?UC7URES WHICH IS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRA/NAGEWAY. IT IS CONDITIONS; TABLE. 3.31C PRESENTS MORE IN -DEPTH INFORMATION ON THE USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR PLANT MATERIALS ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM GERMINATE AND GROW. SEEDBED PREPARATION IS ESSEN77AL. EFFEC77VE LIFE IS 18 MON7HS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PROFESSIONAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY OURET PROTEC770N. FOR TEMPORARY SEEDING, TABLE 3.31A MAY BE USED TO DE7ERMINE 774E THE INSTALLA77ON OF RIPRAP CHANNEL SEC77ONS AND /OR S7ILUNG BASINS BELOW STORM DRAIN AC7UAL NEED ALONG WITH SUGGESTED APPLICATION RATES: OUTLETS TO REDUCE EROSION AND UNDER- CUTTNG FROM SCOURING AT OUTLETS AND TO REDUCE FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF. 10 -20 -10 (14 LBS /1, 000 CULVERT INLET PROTECTION. SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. FROM EN7ERING, ACCUMULATING IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER EROSION CON7ROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEV4770NS AND ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR SAFETY FENCE.• OTHER ACCEPTABLE MEANS. TRACKING WITH BULLDOZER CLEATS IS MOST A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION MEASURE. OF THE SOIL SURFACE, ESPECIALLY IN CLAYEY SOILS, AND DOES NOT AID PERMANENT STAOUIZA PLANT GROWTH AS EFFECTIVELY AS OTHER METHODS OF SURFACE ROUGHENING. PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS SEED SHALL BE EVENLY APPLIED_ WITH A BROADCAST SEEDER, DRILL, PER THE PERMANENT STABILIZA7ON OF THIS EROSION & SEDIMENT . CUL77PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO CONTROL NARRATIVE. MORE 77-IAN 1j INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, AFTER CONSTRUCTION IS COMPLE7EQ, ALL DISTURBED AREAS OF THE SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND S 17E WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT 'LEGUMES SHOULD BE PLANTED FROM 4 INCH TO j DEEP. STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; TOPSOIL - DEPTH, LIME - 2 TONS /ACRE, SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY FERTILIZER - 600 LBS. /ACRE OF 15 -30 -15 SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. J. J5, EXCEPT THAT HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED SEED - ERNST 5311 CONSERVA77ON SEED MIX - ERNMX -114 (45 ADEQUATE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS LBS. /ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS /ACRE ARGILE AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT KEN77JCKY BLUEGRASS, 375 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 RILL EROSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. LBS. /ACRE ANNUAL RYEGRASS & 15 LBS. /ACRE PLEASURE PERENNIAL AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND MAINTAINED ON A REGULAR BASIS MAINTENANCE.• IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC .. , AT7E-NTION WILL BE GIVEN TO THE FOLLOWING 17FMS; A. SEDIMENT BASINS AND /0R 7RAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT - CONTROL HANDBOOK. B. ALL GRA VEL 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. C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DESRIORA770N OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOS17ION REACHED HALF WAY TO THE TOP OF 7HE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED. . M1 `� SCOTT R. COLLINSZ Lie. No. 035791 i PCB �� z O _ U 2: z O U) 00 J H z 0 H W c 0 w '`' OkD it ,, "I Ul Z J J 0 U m rfn (V .,d.. rn 1 0 ON N cV W C/) 0 P4 U 1 CC/) H ,W/ w W 94 .!� \.J O Q z :5 ,,CL V / W M TI U 0 ca W V CL 0 F- F- z W 0 z W I W (D H J po sog � 0 (/) a J c H c L Q E I- C W a C6U W a r t-.4 c �"" � -c s 9 _ V C C Q z ° c c L _j 0 C (� c C t Z .s 0 a U Ho z a W C c F__4 c n' C W E C 06 U z z LL 0 z C F-4 z i v, (i U. 0z 0 c W `' C 7 L Q; C C 7 .�- a a s i J LU G t; .,j I u ,0 ♦ [Z w C a (n z JOB NO. a 02009 SCALE T N/A C fj SHEET NO. c ESC -1 a S H __ ___ __ - ____ "�;,,�,�4­ 0,�­­ V11 I I I I �� . I" I ll� ,­ ". ll,�, \ X I / / ,- �N��?4"-��'�__11,111 � �,,1'71i�jk, � i I I., I IVI� 11W, -, i I , , ) I \ \ " 1�2!,,,��QW*� ,§-',� , " - VOY / I Q0 / "( f.,��', ,jwg.��',�V,x I / \ ,� / " . ­X, 'k "e'T", , If / / ,I I I � t p / / / / 11 � � ___"T 'I \ \ \ \ 11 \ / / .p k�p,4,10,�alg�o' " � - x-gi,,��tl,Oia�,1�2 11 2­r,�,�j,�,,�vl­, 1� � � / / / Xgk W,Nt,�,,,,,f�,� . .110� 1, ` 1'­.�jj -v.? ,., � .. � / / / / I � /. \1 / .11 ,�.� '­ .M. H 0 Mpl_ .� ,� .\ , 11 � � � � � , / 4"� 111, t'.�,�'��i�,,,-,,,����"""t.���, �l I , ,ii� ', NOTES: " - "Mj,` ­��i,�."p'10R,��, \ _ I / i \ , . 1��­Wil` zq"�,.!i','�,� A \ \ ­. I 1� 6�� Z,oW ,'�, -`,� I � , V.',� ,� . / / \ __ I / li I / I ( I / / / / / ...o :pl �op % '� ,,0,�,,,'�-'�� `�, �lle� � " \ \ �, , ',�' 11. 'I / / / / I f I T � � k � . F ,,,�,� ""'M \ / / _T ,,,� 'ii�,,.-i ,� ,�, , I �, i ,7 ... \ \ . / / / .,� "I �,,�,�,��',,�,�Y61���,,,�,,�,,,�,�l. . / / / I I I � t I " \ i. THERE IS NO TREE CLEARING ASSOCIATED WITH THIS 1_�.\ ,, , � " 'A�l� ­,,, , �,;� \1 \ / 1, / / I / �'ll !� - l�,�!%,�, �,'Q '�.. - �_ _ ,gg,,-_XiM­wM- \ / / 'k, , , � / \ / / " �- , z Y�' 1� 1,4­11, 1 \ / I .j / I � � � � PROJECT. THE LIMITS OF DISTURBANCE FROM THIS SECTION 0. .,� �, �','­�11­'11- \ ,eX 1. W��11;10 2 '"g, \ � __ " ��, ., w 2 , �,��,,�`N`X��,, A,� W \ \ '� '41, �-� � i I'l-', ,��:'gg,.�,%"�-,.,. ', � V �_ / / / . � / / / /00,/ ,ll,­,,ll-,wM_­ll. � ��, y?, ,�g, , - . gg��gm,g pg­ ( ­Wff,'�­ P� VVV',!'��l z, '\ I , ', "I '4 �,� '. ., u, -, � �,.�., , I , , ,� / \ . ". , " I I , � , ­1'6, I I � 11 � / ONLY INCLUDES OPEN FARM LAND. THE TOTAL LIMITS OF . " , 1111*11115fll,ltlll�'Rel, . " , ?�g " .I \ \ , � 11 / / . / � I I � \ i SCOTT R. COLLINSZ I � R"', ­ -- �� / " I A / / / , ,,, i�4i��4�y��"Te�KM k , i �Q�' \ I\, _/ , / /11 ,�,ev'�f �, �g#p'ngm,"vs \ 1� 11 / '��!WJ`6-1?,_ 79'p. 'll �.,� " I �,g',pMW,�, "'') _wg ,� 4' , , � ��,gg , " z , � I I \1 g"a g4z,�" i. , ,� / . \ -_ - �_ ­.l_­l'.­­,,­, I A - -­g '­ I \ \ - _/ / I , / / I i DISTURBANCE IS 8.12 AC. c - Y�;,,��,,� � " vo,", '7 Is, / I � _ -, . c " I _4 f, 1. �,� ­ljj�'l g"'k � I - \ , / I I - Lie. No. 0357913"�l " �11V .g�.Affl (,. 4 , /\ I \ 11 / � ( - ,�', 11. �g ag I, . % ,g,-� , F" \ \ �l v X � / / / / / '�� i�f � -,- 4, 11), \ '/ -LA(3 LL)CATI N Ut- I-LL) U ?--@�� �-,,,�,y', vq,� , � \ / 2. CONTRACTOR I U N I E ND I , � , '' , - - � 1� �5 , ,,, " _4,� "'i � \ 1\ � �, 'r � I I � i / / of \ \ , I I �6 ��IMM" - �iki,�jg4j' log , I / � r _, ,A,qj'gw4-,,�," �, ,,,; I �, .�,m / ' PLAIN AND WETLANDS. FILLING OR CONSTRUCTION ACTIVITY epn Ill ."", �'­­,�� IM .4 )Z,�­,�­x­'P�% 11 \ 1"..." � � , .rf '� , \ / �l 1.11r,,�,,� ll��'� , �_10!1,MKI.11,_R, 1 I-, \ \ Nlll�- � �-/ / I � � � � \ - / / / "" ��, W ,* p , �1�1 I , ,%�, I \ , 1\ - __ / I e �� � � ".. /1, / / �t_.. -, � - , , " g�,-,, gyi �,�g 1, - '. "m - , " \ -1 %\ I / � I I I \ - i's ,tl ", , lM'll'i&` 0_1� / __ MAY NOT OCCUR WITHIN THE LIMITS OF THE FLOODPLAIN. �� ", � , . / i I � ,�m ,�!�,�,�f"",�ui"",-it-,;"g,4"� !`�E ,� , -%%-,'.., . / �, , ��, ��,'?��l \ \ \ g \ -1 , -, / �;7,���,��iff,li�'ll�;"41�,�i��i��l,.,,, ,ill" I A�0�0tl; '� -, �L�-�,��i�,,Q-,,-�'I."V""�'lI \ I 1,112601t -1 " "I, . . . . . . ­X"'�'!l �� I 1­2 � � " I .1 ""�11211`�5 �,,!�, W4, V�jig�;, \" " , / / CONSTRUCTION ACTIVITY WITHIN THE STREAM BUFFER SHALL �A . / / � - 11 ; ----- ­��l "' " " ............ ,- I 1\ '_ 1. - 11", M0 I 01 12, M,iqll , , 7�, -, \ I � " \ / / / , M �u,M ",.,�,,, � I I v g,v '� "IN �`? ;, 'VI , , - -,,,,, ll_Sl,��&11�1�1 , \ / I ,�,,� �!p�l,,Y,�,,,��,�,�',���f*,�,-���,;.�'�., "I �- ", "l \ \ - - I / � ,'-,il' 144,3mr - __ , � ,,gr, "v" ", g,- ,,� - a 4f 4** " / _.�, g,�, 1, .,� ,,7 I gr 1-11. , - M / - ­ _�� , - u� �1� M 1 1 � , 1, , -- " \ / I " ""I ... �11 �� INN - -, t I I I j -IN. NO OTHER ACTIVITY IS ,­­­ " -- I �� ,111,E�,l � I 1, , gu�,�r,fflmog "'Y'R I - - �� , , I , ,�, g,�,­- , , , ,g� a w � , ll*­,, .�'lffil 411 ,-,-,I I ly ­111. 2, " \ __< \ \ A� / � � � I I ", ,� \ / / / BE LIMITED TO THE SEWER TIE � ��,qg ,�g e� .e , ,-,,,, ,, , , �,�,," 1'� . " N 19 "I" �, l" ­�,i� , . ..000 , , �n, �,p, 1, ,,,, .4 1­1.1­1_11­,�b 1111- � � � I'll -,�'�,� - 'I'!, I , " , g �g �,, ­20k , , '?.1�11'1 A11­11­4-1,�, �­ . ",r,- , � E ­11 . \ \ \ / � it I I I \ \ // I I I 21, ,,,,�,,p �, " ­­ , , - \ 4f ** / / ALLOWED WITHIN THE STREAM BUFFER. ,��, Ill ,�,q;,V, "N ""I qg&�, I i , !, " .�� - - \ 11 i / / I - ��,.gw- , , 5", -1 \ � \ / / � i I I I f M, ", , - 01"`., _�: I 1 ggg� . �,� q�­ � 'x- ", \ �� A� 41* / / / I \, ,,� -�m4 ­!g,,�, , . .- , - gs - � ,.,i 1.�­ ,� 1, " .111. Ix �4,$­�W­,zr ,g�z A ,� N " 1, I , \ 1, � _�h,;-,�,�,4, �,-,:�'­ll �lk*02`� � _- � �;, _5 / 'WONW, M11-MR! 11 \ I­ "I I , �a k, V, I � I 1 " wfft,�� 11 . �� 11 ll­�% 'k, c', �1, � ii 1, � I', tlt,,� . 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AL� CONSTRUCTIPiN � ,�? I I / . , :..,.., - I � ,'— '­ I ... ,�. I (10 I / . . / 1� I .., _ � ..% " 1. a) I I . __ . 1� I ..'�. momm 1 .!�� .. I.. / \ � \ w w If .. . - - I .* � 0) . / I I ....". I I 11 . ..* ___ +_ I - .: I I . ... '.. � / ;. I ko TRAFFIC SHALL UTILIZV THIS CONSTRUCTION , / I I I � I I . � / :... - — i,% \ .� � .�� I .*: .!� i .." * __ , , :1 ` I .1 \ ENTRANCE. NO OTHER ENTRANC li / / / \ ", ,.- ... i I / . ". 1. __ t'. a , , "' I 258 " . __ ____ I ... __ — I t � -1 . : /ES TO OLD . :., I I I . . I ":. — — - , , , / .:. I .. I ... :. I - I ... ''' :.1 .. � � ." I � i � . / 1. �. �:: — ., I __ I %.�. - TRAIL DRIVE SHALL BE UTILIZED/AND ALL " / � L * .., I � I .-i ___ .... ..�.; ,.., .. . / . : *..: f 10,510 �. q1_1 ... I I i I .... . "I I . I I ,:, - . - ­ i I � I .... I I . Ill --.,.:.,.. _ f, ., -, =� -, � / I \ . .., I ; . __ — - . .. � OTHER ENTRANCEO TO OLD TRAJL DRIVE SHALL .. . , . , 11 I �­ ,' \ -, . . ­ . .. % �.o I I / ,,­ ...r: I I I .. " __ \ ll�' n __ __ ___ . . : . ;.1 'O'� ... . / I � . % . I I — — . — I . i ::. I . BE BARRICADED Tq PREVENT MUD �ROM BEING / i � . — — :­' � I , � .0 : . w " I I ''L. __ � .. / . __ .... . .. . I ., � \ - .... ... )l .1 I . - 1- . . . I I . , .. , . �� f -, — , I , _ '.1 1. I . - , " � / I ..' .: �� . , , I ....., — — —, — _.. — � . I ) � .. . TRACKED ONTO O�D TRAIL DRIVE. , . ,­1 0) / t I .. ­ I . - ­ 4 I � I I % ., .t. I ,�-,., __ . I . : ....� .:.:. I . CO I / \ I . / ) . .; I I �.: — __ - . __ — --- *,:;, \ .,tl. `�q_Q,\ � I . ,_1 (c) � / , I � �: I f ____ ! . , i � � : .. I � / I . . . I 0. � tt.. I , I I . t . - I f___ �11. 1. I / %, I � " .. m; �' / I ��.�'.-� I I .,'�; —1 f # f___ -, , I �'j'. _­ . . . . � . / I / / / / I I .. . ____ I t ; I ... .. I I . . . / ,*','.' i !:, I __ - �0 __ ­ ­1 \ / I \ -.1 / I I �, " I I— I 0 L .., % :f, __ j ; , __ __ __ —ly, 1..t, _.. __ ,:. . � . �, ,�, I �l I � . .:-�, I , I , / / .... 14- ,". '.. L . . 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ESC-2 AICMI­ _1� , '; �1�',' .1 - �l I I \ \ z // � I/ MI'llz2k� � ,,, .1 'It , / \ / i / I I I QQ � � � / II I , � �.� li ­,,, "Atr, -z�,", � \ \, 1, Pxl�,�i' .., "I I I I \ / / I'll , �.�,,p � " \ � \ ,� ,III , , I I . ;,�, ,:N 1� I \ / I I . / / I 1�4 �w 11 / i / / / / R"A"R�_'_-j ­`l \ \1 \ � � 1 � � � \ I TH Z,".� \ _� __ - I . � 0 , SON_ "Wir, I \ _. /I / / I, / / / / / NOTES: �_l W �l __ 111.11'M�IO� I � / / 7� t- III II7, n \ � T � I " � I I ; 1'�,11,41tll­ 'I \ \ / / I / / i. THERE 15 NO TREE CLEARING ASSOCIATED WITH THIS lk?�, I,� nill'�, � � ,'; ...... � . E"A"', . 11 ,,,, ;�,�lql ­111 I., I I � � � � \ I / / / , �,�,>, / / I I ( 11 �,,<��� .�1111%1 i \ \ 1�_ '.�'�,iq, - I \ \ \. . '� -1. i / / / / / / I � � � � I \ / / ./ / / / 1��rl � ...... I -1.1-111 "I \ I / � � I PROJECT. THE LIMITS OF DISTURBANCE FROM THIS SECTION C� " , , , / ( I .... !11 I ,� " . . . . . - / / / 0 � 11;1,1�',._ \ \ \ Ill y"""', ,­­,;.11,1_� \1 '1� -, '� \ � ./ �_A ''I'll ,A, `l -,�l \ \ I I I I \ / / / /' / ONLY INCLUDES OPEN FARM LAND. THE TOTAL LIMITS OF , W'll' Oil "I,,,,, �'fpt,��;� I/ / �*.t,,!�'7�� 1, ,­­­�- 1`1�_,R� � ��.­m - 11 11 / I N§� 'm I - " IA "'IV, R 1,171t. _-, . / / I I I / �,,�sgIR \1 \ 1\ / SCOTT R. COLLINSIZ g�,�AeRi P, " 4 � , 7�lli;"�l?el.�i,�,��",��t.,�"i'�.,,1 \ \ " ,; ,_ 1,�`, ,!"ffr xlir`l,',� ,,� 1, \ �.,!,_,­ , , "(6 0 . �� 11 / i -_ I. ,�, � I / , ­ 1-j'�?-­,'­��M - _� , I, , -,,,��,�,M,0,� � \ / "', �_, \ ". 17��Vmg_�,, I I � 0 , , Y�� 11 , " I .1/ S�lm�, AX���,���,,�:.."ie�",�PV.�.,��-�"m�k..�ii�� " " / I �,�"','§ ,� ;,j4.;tA.-�,,i4g,-"E,--,���vi��� \ \ , \ I � 11 � / i / DISTURBANCE IS 8.12 AC. �, �,Nil,�§-.' , \ - �/ / "R I �qg 41-11".11 ,0'MR."E"�,Iv,i� _­ ___ "Ril 4 Rlil�ll �, U Lic. No. 035791 ,�__- "W`,!,Uvk�,�', �.'�.1�11 lr� ,'lIi ,III 1-1** �M)"' ", , � � , I ,/ I Ng,,'l� ­1 I, 1'_, / I k � � I ­,D Vt,,I'� I I',, (I VA."mm, ��, Wl,�x',��'.,,M,%,� �� I �l . I / ' / / 2. CONTRACTOR TO NOTE AND FLAG LOCATION OF FLOOD " I �, z, \ ,�,,,� 'p� \ \ � / , " �,;,�I�4'g, , ,i 1, / / Fzx� .,� \ - / 't, ital,vv _,,,N�5,k \ I \ , I , " �- 2, R;',0,),M",,' I � I I I � i V16 1 " - '�,, "'A" " N, 'g grI / � � " ,',O� / - ... I -, �� "�, - , ,�)-� \ , \ \ I / i I / 11, �� 7 `�­ ,!'� iN '� ;pl - � , . I - \ / / I �� ',l ��!�,f",�,,�;',�,'���""",,.,. r ..., "I "I'll, . � \ , , 11 " .. I /I I'll ;;;; .. . �_­ � \ � ", ­,­ -,�, �,1111111 1� 11, \ \ / I � I I � I - ' PLAIN AND WETLANDS. FILLING OR CONSTRUCTION ACTIVITY . . . . . . . .11 5 I , �� �� 11 I\, I \ I , I / / / f , Il .. 11 . "I " I , , _/ / / j � � __ - / , -4 -,I,% _11,�_ �t,f 11 ., " N ,.... � 11 � I \ �l / ) I - MAY NOT OCCUR WITHIN THE LIMITS OFTHE FLOODPLAIN. ll� I �;gx,�, . Rlt,,,-,lj,,_��!�.,� � I - 01% ,2,t�"j a 11 ­ \ '\ i \ / / 11 1. -,-,�� "" � ,\ � / f I 4 lffl�,�.1011` \ , X�/ 4e_4�iv, _�, �,,��'­,a,il'�' �., . , , _,_� ) f ��Nh ... � ,� \ I "i IONAL lz " �,�� , , - �.� 'IAI,11� 11 � e � I I 1, ,� I I � � � I p �Illll :::'' F / / / I'll �l , . "A , " I 19.1 , ­�� 'j��, &, , , 44* \ / / / / / CONSTRUCTION ACTIVITY WITHIN THE STREAM BUFFER SHALL . �� I ffi,,�g Ae-, - \ ,� _ � — - � � 1, I I � .111111�'..11ll 1�, ", \ \ .�, / . . . . . . . . . � � �l _', \ 1, - -_ .__ / i �l � I I i I / -IN. NO OTHER ACTIVITY IS I ,s�5,,p,��. \, \ � '� \ � \ \ \. ANI 411p* / / / / / / / BE LIMITED TO THE SEWER TIE 117 AII / i I I I \ / / �11 � 1, AV / "; . \ � \ \ / \ / ­1�11 \ \ 4W . I ALLOWED WITHIN THE STREAM BUFFER. �illll 111, �', IV ,,l�"3 " -, '. � \ -1 -ql� , I I \ . . . . 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INST�LL SIGNS �& PERMISSION TO ALLOW SBI TO BE 'ENT 13�SINATIALL LIMITS OF \ \ "I - / � , � TIMES FqR S, � , \ \ . - ,n­­ �, ,,, �, �� 01 I ... F�:� ENCOMPASS SEDIM \ _,��_-�li�_I�Ll'-_U- �1, ._­,,Q­'­�p,I,3;" ­-, ­.­ . ,g , 'k �l __ __ 11 .", ,,� 'e'?"ll Ir 11 wnm-�,,, ,� R,t��g!4.�,;�U",�'3� Vmll.�,,,'AN­ .1 116111Y..."Mi �l - ,,� " 1, - " � / z 11" ... \ ,\ AROUND BA�IN THAT READ "WARNING, O' TIMES FOR SAFETY. 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CTION A -A NM- A 11444MM WATER TRAP OF t" IS RED WITH A MINOW WASH HOB OW Of 14" ri"'�PAVW TWP CMT RM SQ11,E' AIT4 cE CONSTRUCTION ENTRANCE NO SCALE TABLE 3.32 -D SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA Total Lbs. - Commercial or Residential 175 -200 lbs. Kentucky 31 or Turf -Type Tall Fescue 95- 1009c - Improved Perennial Ryegrass 0-5% - Kentucky Bluegrass 0-5o High- aintenanae Lawn 200 -250 lbs. - Kentucky 31 or Turf -Type Tall Fescue 100% n r Slo - Kentucky 31 Fescue 128 lbs. - Red Top Grass 2 lbs. - Seasonal Nurse Crap * , 150 lbs. �w-Main n1114C4 Qw (�.atil 3.1} Kentucky 31 Fescue 108 lbs. - Red Top Grass 2 lbs. Seasonal Nurse Crop * 20 lbs. 20 1h Crownvetch ** 150 lbs. * Use seasonal nurse crop in accordance with seeding dates as stated below: February 16th through April ...................... Annual Rye May 1st through August 15th . . .................... Foxtail Millet August 16th through October ..... . .... . ... . ..... . . Annual Rye November through February 15th ................... Winter 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 inoculated, Weeping Lovegrass may be added to any slope or low - maintenance mix during warmer seeding periods; add 10-20 lbs. /acre in mixes. TEN STAKE L POST 'TH = 5' MIN. SIL T FENCE sF (WI THOU T WIRE SUPPOR T) 3.05 -2 NO SCALE DD TEMPORARY DIVERSION DIKE Compacted Soul Non -- Erodable Liner 18" min. E- --Flow �- -- - 4.5' min. SOURCE: VA. DSWC 2"x4" WOODEN FRAME 1.5' MAX. 3' MIN. PLATE 3.09 -1 PERSPECTIVE VIEWS AME 'A THER XCESS IT CORNERS ELEVATION OF 77 AND SILT FENCE IP DROP INLET PROTECTION 3.0D NO SCALE SEDIMENT BASIN BAFFLE DETAIL NO SCALE SHEETS OF 4x8 xj' EXTERIOR PLYWOOD OR EQUIVALENT 6" I ii 3 2i ii SCOTT R. COLLINSZ R. I II II I it I II I II X II 4' it II II II I I I I I CONCRETE BASE IS 18" THICK. 2 TIMES RISER DIAMETEi, ABOVE. SEE VESCH PLATE 3.14 -3 FOR DETAILS. 8' RISER CREST ELEVA 77ON POSTS MIN. SIZE 4" SQUARE OR 5" ROUND SET A T LEAST 3' INTO THE GROUND AR" �nt`I(%RETE RISER W/ LV. STEEL 1EX DEVICE 352.00) 'x8'xl.5' CONCRETE BASE TO BE ISTALLED BENEATH RISER PROPOSED PRINCIPLE SPILLWAY N TS 1992 3 2i f�F E.L IS'Pff"'DE.R SCOTT R. COLLINSZ R. GROSS" SECTION X ' .HULL. � L%1k4S71.�t' oR oo ;,Lrnr jj volume(cf) 646 8869 0 RijMFR a kin 9,327 648 10750 19,595 649 11738 30,835 M1 (Ip f. 1 43,079 b•�. a.; t - t 56,353 LEVEL SPREADER WITH:VEQETATE- Q LIP 70,685 CROSS SECTIOJN - t WCd tlb. +Ji„S4 OA :pW0.1A81,E � r. pPSIRT SE�'U�. ilik ME I "iQ,iiAI.�LR E�Cs II, TWATM TIV%01i MY STOR01 E N- xN: F.YVIRF 7tt 1 yi�i".fl $• UI4..--^... VIII rnl� 5wxh�; " WET " STORAGE EG 'Mgt . sot: I tLar •i r" '".:,- 1,596 gar•, a: t ..LEVEL SRR ADER - :y1tITH" R1Gip; LIP r MN. PiYSN LL PEOI!ReVlNfS or tgltn rJnli railtA N SI0 SPEC. �,tti, RIPRA? 5ooive- va, Pswe at<d`N.G' EI LQ11 aw &W -161 '. f anYrol planning Sud Dcsien :�fanu l Plate 1Z1 III -'19S 40, �) 31 3 i TOP OF DAM :654.0 ELEV:653.0 1' 1.5'13ASE RIPRAP SPILLWAY DESIGN DETAIL N.T.S. / / Table 15: Sediment Basin design (spec 3.14) Sediment Basin design Z 0 drainage area (acres) SCOTT R. COLLINSZ R. basin volumes: (using 2' contour intervals) X elevation (ft) contour area (sf) volume(cf) 646 8869 0 647 9793 9,327 648 10750 19,595 649 11738 30,835 650 12756 43,079 651 13800 56,353 652 14869 70,685 653 15963 86,097 654 17083 102,617 wet storage: wet storage required (cy) (67 *DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (33 *DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1 ) dry storage: dry storage required (cy) (67 *DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice +2 ") runoff C (use 0.45 for bare earth) tc (min) 12yr 3.3 Q 2yr 125yr 5.0 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) PLUN PEG OOL W /\ RIGID�x'`�` ` \ x�, J LIP LEVEL SPREADER. , ` \ SEE DETAIL, THIS SHEET L=\12: W =22' D =2' TH pp, 1311.2 649.4 1311.2 645.8 647.8 1.5 1311.2 652.0 1311.2 15.0 17.0 0.7 16 45.2 68.5 48 45.2 72 36 6.0 30 design high water top of dam (ft) top width of dam (ft) bottom of basin (ft) approx. bottom dimensions: upstream face slope: downstream face slope: baffles: length of flow, L (ft) effective width, We (ft) L I We (baffles required if > 2) collars: depth of water at spillway crest (ft) slope of upstream face (Z:1) slope of barrel (Sb) length of barrel in saturated zone (Ls) number collars required dimension of collars emergency spillway: required capacity (Q254p) (cfs) bottom width (ft) slope of exist channel (ft/ft) minimun length of exit channel (ft) crest of spillway (ft) 653.0 654.0 10.0 646.0 20Y x 58' 2:1 WA YES 215 90 2.4 YES 6.0 2 1.39% 2 3.5 X 3.5 YES 23.3 40 14.29% 18 653 Z 0 MIN. 1. V4SMLWAY CREST GF EMERGENCY 2.9NTNOUT SMLLWAY SCOTT R. COLLINSZ R. 19'57 X Z �U M DESIGN HIGH WATER 0 Lic. 035791 ,2a (25-YR. STORM ELEV.) z volume(cy) Ov 'k**"OXAL 0 MIN. 1. - -- -..- .�..� � 345 ::` RISER CREST E�Cs 726 MY STOR01 E o N0 1,142 " WET " STORAGE 1,596 2,087 2, 618 aMEN; CLEAN" POINT Z % CEERRE) 0 To� s car 3,189 3,801 1311.2 649.4 1311.2 645.8 647.8 1.5 1311.2 652.0 1311.2 15.0 17.0 0.7 16 45.2 68.5 48 45.2 72 36 6.0 30 design high water top of dam (ft) top width of dam (ft) bottom of basin (ft) approx. bottom dimensions: upstream face slope: downstream face slope: baffles: length of flow, L (ft) effective width, We (ft) L I We (baffles required if > 2) collars: depth of water at spillway crest (ft) slope of upstream face (Z:1) slope of barrel (Sb) length of barrel in saturated zone (Ls) number collars required dimension of collars emergency spillway: required capacity (Q254p) (cfs) bottom width (ft) slope of exist channel (ft/ft) minimun length of exit channel (ft) crest of spillway (ft) 653.0 654.0 10.0 646.0 20Y x 58' 2:1 WA YES 215 90 2.4 YES 6.0 2 1.39% 2 3.5 X 3.5 YES 23.3 40 14.29% 18 653 , = } � RISER W/ JB2 TRASH RACK ♦ _ _ ' - - _ BAFFLE \ \ - _ I GRAPHIC SCALE _ 20 Ol ' O _ 20 40 - J 80 FEET) - ` ~ 1 inch - 20 tt- -` - 1. SET POSTS AND EXCA VA 7E A 4"X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS, X111= r I- FLO- w I1 =1I II I II I II I I� 2. STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE THE WIRE FENCE AND EXTEND EXCA VA TED SOIL. IT INTO THE 7RENCH. sF SIL T FENCE WITH WIRE SUPPO NO SCALE FLO14 EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. a LU o �Z rI Z Z 0 rl (S1 Q. 1` X Z U LU M 0 0 W M z Ce W ce , = } � RISER W/ JB2 TRASH RACK ♦ _ _ ' - - _ BAFFLE \ \ - _ I GRAPHIC SCALE _ 20 Ol ' O _ 20 40 - J 80 FEET) - ` ~ 1 inch - 20 tt- -` - 1. SET POSTS AND EXCA VA 7E A 4"X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS, X111= r I- FLO- w I1 =1I II I II I II I I� 2. STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE THE WIRE FENCE AND EXTEND EXCA VA TED SOIL. IT INTO THE 7RENCH. sF SIL T FENCE WITH WIRE SUPPO NO SCALE FLO14 EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. a LU o �Z rI Z d' M 19016 'A n >r N ° c UU C'14 _c N 0 0 M W U) LU Z O Q W ` W a L O U ° L9 O U 0 U)Q J U %i_i n c I G 0 W� Q o Z _ UlW Z i�••� 0 �J s � 1..L V / w W Cd _Z ' w Z rrl 1 1 1 1.1.,.1 � Z w ...� Z :5 0 O 0 0 E....I > v V 0 X v v v J o UJO u O � a0 JOB No. 1 02009 a rl (S1 Q. 1` m � M 06 N W d' M 19016 'A n >r N ° c UU C'14 _c N 0 0 M W U) LU Z O Q W ` W a L O U ° L9 O U 0 U)Q J U %i_i n c I G 0 W� Q o Z _ UlW Z i�••� 0 �J s � 1..L V / w W Cd _Z ' w Z rrl 1 1 1 1.1.,.1 � Z w ...� Z :5 0 O 0 0 E....I > v V 0 X v v v J o UJO u O � a0 JOB No. 1 02009 a SCALE ° N/A ° T SHEET No. c ESC -4 a IIIIIII... .. ...... IIIII0 7 I ...... ... . IIIICOTT R. COLLINS�e, U Lic. o., 035791,'t,. 4V I4W* OLF=:iool�*,lillit L AELE.. IN n 0 N CF=4:z5' qLEV-30' I0SEO'B DRAI APPkOVED(\B,tK2, PROP 4�K 13 & FOTURE BLK 13:$ -TO-T"NORTH, LICKINGHOLE CREEK, \NS, IA [E�y WANR QUALITY 7REA WEN T & DE7EN 770M /S �ROWVED BY -N7701 BASIN TOTAL ARE4: 12,5 E ql?��Effl '91b\`1MPikVf0US==-20% MIN. (I W AiIR 6UAL4 /1, 'CN=61 & Tc=6.16hr� (DE7N770N) ) I I z f 0 f U 2: U.1 Ai z J IAN A$r I t OOPPP hoN 6F BLOCK 13 DRAINS 7(0 IUTURE PoR LU THE SC BTOWN CREEK) AND It 1UTH)(SLA N 'RT bF THIS 6ET OF PLA A OT NS. ce I4L 4W 4W APPRdVED BLOCK 2 RAINS 4W 4V TO T (LICKINGHOLE-C E 4V TO THE SIORETEN771 4W I I FOR TREATmENTIDErENtM PC�EO LOCK I ROj 3DRAhySV W4 (LiLF,#VUt1UL EEK), Z C3 TO 7nE BIORqENftON %TEIN k -MUZ—,7 7 EATA N17 14.1 IC) FM of *Run /in, MR NJ PHASE B / r 4 — — -- / BL OCK 3 DRAINS TO E NORTH TIDETEN �HOLqCREEK) TO 1n1:Xf:1f:N11UA rt, BASIN 11 FOR TREA, TMEN FU71JRE POR77ON OFRLOCK 4 DRAYVS 71ON 01 THIS SET OF PLANS AND`I�'NOT PART TO THE NORTH (LICKIN9HOLE CREEOTO 1 THE RETENTION BASIN If FOR TREATMENTI FdTUqBLOCK 1%� DE "HUN AND IS NOT PART OF AIS SET OF PLANS. DRAINS TO THE SOYTH SLABTOWN CREqK) AND �5 NOT PART OF i"§J a / , / THIS SET OF PLANS. z M ANIL A 0 / IN 7- CL LL WIN% M-N a ..... ..... . 4%k 0 z LU . . ......... UJ 0 (D z t Version BMP Computations For Worksheets 2 - 6 z < Z Adbemarle County Water Protection Ordinance: Modified Simple Method C: Z LLJ f Plan: Old1ra# lqllatlo�- Phase 9 Block 13A Road Plans Water Resources Area: Development Area L- (n a z ca IUJ'SO IPrepa,er: FGM, PE Date: OB-Jun-10 0 L9 C J f I6 Project Drainage Area Designation DA# 1 UJ EXIS77NG DRAINAGE AREA TO UPPER BALLARD L storm pollutant export in pounds, L [P(Fj)Rv/12 C(A)2.72 Ul Rv mean runoff coefficient Rv = 0.05 + 0.009(l) FIELD EXISTING 0 V Imail storm correction factor, 0.9 RETENTION BASIN 11 Pi I tpercent imperviousness P annual precipitation, 43" in AJbemarle 0 (D (n A project area in acres in subject drainage area, U CL C pollutant concentration, W or ppm target phosphorus f factor applied to RR 0 V required treatment volume in cy, 0.6' over imperv. area A(1)43560(0.6/12)/27 Iz f x L(pre) RR required removal, L(post) %RR removal efficiency , RRI 00IL(post) LU W E 0 -0 -r- I rvious Cover ConVixtation (values in feet & a IIquare feet) U1, Rem -development Area Post-development Area pro Roads Roads 0 Proposed & Approved 45,013 Future 19,398 z .0 /* > 0 64,411, U 9 Driveways and Parki Drivew. C Lots 0 Proposed & Approved 21,283 Future 15,857 UJ 0 0 37,140 ;idewalks Sidewalks Prop9§0 20,624 & Approved I0 Future )52 2,528 23, IGravel Areas Gravel Areas r Ix 0.70 0 K0.70 0 Buildings Buildings I0 Iproved famsed 52,961 00 Future 27,463 o -------------- (n 80,424 Actively-grazed pasture & Area Grass Yards 0 IILU Yards and cultivated turf 2Lx 0.01�= 40,772 368, X0.08 29,493 0 509, F 0 Active crop land Area Area b L 1x0.25 o 0 IL---Lx—o.25 Lver Imiparvious Areas LU E II0 0 0 0 f Ef) IIrvious Cover 0 JOB NO. Q) Rpre) Rpost) 02009 .2 GRAP 0 0.42 L 0 zo `100 0 --4,00 HIC C. ALE- I20 ISCALE Dove nient For Dove ng impervious cover ----------- We OP/0) Now Develo nt Areas, existi I1( re W re re RR W C f rea =100' ea (n MEN IINI F il& A ft. 0 NNW min. values Interim Manual, Page 70 rev, 16 Feb 1998 GEB SWM-1 100 1/ incb / / �� // /% i /// . ° / / r �/ / /// /// ' r / / `- // // / / t sftr,, rt, 11 / / / J __ J / / / //� / / /j, + / fit, ' i / / / � /i // '�'/ /!/ +afn'rr`rr c '.11 / / �i �'/ �y17 /x zit / / r. // ¢ z�fs> / 7r �t4 / / / ' / / '/ / �a�t,� ,�� tits '� / / / / / _ / / // ' .rl C`�» '71 .f f y i-'1+ { Sa i aT z / / / b}} ," 4 i fts to ,rn 4_'.,,�- ­f tl / . , r c cz' 't a a' ?. ,4,s 3 r f / /t+, r i a d t i;. Yx 1 'r�trf, tt/ -"`„t` ..� / / d y r 't lr\ 1 rrr Yti P , ut'x �1 9 / a ^c i, ti rf i t 'V { tea{ aa' xK '' / / / - St.}s>ro 'IC"', ix f {t; iF }r'';f,, fr''w4 �_'$ UDSe ra- ' s / 5 y Rua ,:s '^' ';�',t x r`i l 45 k# / {FL t,i* -r4k{� 1. - ✓� / 4l.v,A•• t 1.,"4 �# §x� �'t -it.t j a s {�ree .;rt .n "'i el a+ rat y �C k r r ati ° ri. t' - ��`x r'u`` i .trt a i m >Tt m `T 1r __­14100p, IM r,K1 -„'q ,r qF' .;�A`7. 7n dr sr.4✓'4fyx -7:7/- t F ,? w T> -dn,fs, ,8, ....... '„ ,k,_,;,t,: , 3.51• P,fi - ru ,.. ,r, <_; i S r . -t, _ ._.- ; WEIR \1( 1 1 t \ \ I 1 \ \ \ \ t \ \ 1 \ \\ \ \ , \ \ \ 11 \ } 1 } 1 1 1 I , I I 1 1 t ` I \ I I I ! t } I I II I 1 1 I I I I ' I 1 I I ! I 1 f ( 1 1 / I II 1 / l r / d 1 I % 1 / l ) 1 // / I / /c f / , ,Impervious Areas- Pro sed, A roved &Future Blk 13 Roads 64,411 sf Driveways and Parking Lots 37,140 sf Sidewalks 23,052 sf Buildings 80,424 sf Grass / Yards 29,493 sf -/ // - / - / / / / / / / / R s r qa ' / ,; "t � // / / / ( _ I/ f ' ` 1 Y F S s s �. E� t ,f % j \ i S 14 V h { \ t' 1' g �r L F 3 ?" rv; :� 'r 'i a 9 f r , /R`i SL / \ - ��1�'­�,&i',g.�� r\ � -,, 1 11 / - ,» _\ 1 I 1 \ 1, \ ` \ - 1 I \ \ \ \ %,�" --_ 1 \ i /e � J II -..---,I ( "( /, III I�j r/ �I I r ,,, I I V AA \ II� /, / l// / I I / / \ \ \"\ 11 / / 11 //I , f,t I / \\ \ \ \ \\II/ / /:IIII 1} I / \ \�\ \}\ /Ill I1,t / , -- -- v�vv_ l l l ' 111 ' ' I / \ =;I I I I - L v '61, M ) I f \ :/ s rte. _ �_ _i _ , WATER QUALITY VOLUME & BIORETENTION BASIN MINIMUM REQUIREMENTS: Minimum Forebay Volume= 0.25 inches per impervious square ac Forebay Depth to range from 4' -6' Impervious Area= _2.34,520 sf Minimum Forebay Volume= 4,886 cf Minimum Floor Area= 5% of impervious square acre I mpervious Area= 234,520 sf Minimum Bioretention Floor Area at;[ 111,726 sf has � � Forebay Volumes Provided I Basin Volumes Provided Elevation Area of Volume 7 T 'r, Area of r { .. (ft) �. I f l la k: 3 •. \ 1� s\ a I " \ \ ;d' 642 \ ,1 , } 642 , I 0 643 1,021 833 643 „" f. <I \ ,Impervious Areas- Pro sed, A roved &Future Blk 13 Roads 64,411 sf Driveways and Parking Lots 37,140 sf Sidewalks 23,052 sf Buildings 80,424 sf Grass / Yards 29,493 sf -/ // - / - / / / / / / / / R s r qa ' / ,; "t � // / / / ( _ I/ f ' ` 1 Y F S s s �. E� t ,f % j \ i S 14 V h { \ t' 1' g �r L F 3 ?" rv; :� 'r 'i a 9 f r , /R`i SL / \ - ��1�'­�,&i',g.�� r\ � -,, 1 11 / - ,» _\ 1 I 1 \ 1, \ ` \ - 1 I \ \ \ \ %,�" --_ 1 \ i /e � J II -..---,I ( "( /, III I�j r/ �I I r ,,, I I V AA \ II� /, / l// / I I / / \ \ \"\ 11 / / 11 //I , f,t I / \\ \ \ \ \\II/ / /:IIII 1} I / \ \�\ \}\ /Ill I1,t / , -- -- v�vv_ l l l ' 111 ' ' I / \ =;I I I I - L v '61, M ) I f \ :/ s rte. _ �_ _i _ , WATER QUALITY VOLUME & BIORETENTION BASIN MINIMUM REQUIREMENTS: Minimum Forebay Volume= 0.25 inches per impervious square ac Forebay Depth to range from 4' -6' Impervious Area= _2.34,520 sf Minimum Forebay Volume= 4,886 cf Minimum Floor Area= 5% of impervious square acre I mpervious Area= 234,520 sf Minimum Bioretention Floor Area at;[ 111,726 sf has � � Forebay Volumes Provided I Basin Volumes Provided Elevation Area of Volume Elevation Area of Volume (ft) Forebay (co (ft) Bioretention (cf) 642 658 0 642 658 0 643 1,021 833 643 1,021 833 644 1,445 2,060 644 1,445 2,060 645 1,929 3,741 645 E16,8 77 9,821 646 2,472 5,936 1 646 18,441 27,484 647 3,067 8,700 647 20,064 46,731 648 - - 648 21,659 67,587 General construction notes for Stormwater Management plans 3.. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser 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 control inspector. �/ F €) T44a `,,, }. r , , \ 1 , \ / ^- _ .- / / / C ,ye',gy � \ \ \ \ / / / / / / .gpt t \ \ \ \ 1 / ( / / / ! / / / / \ \ \ / . / ti r�r \ \ \ / �`'� y v' \ \ \ V / �� / �, •+ \ \ 1 . \ \ . � v i sad \� \ \ \ 1 1 \ \ / / ��` , II \ \, \ 'PLUNGE P�\\OaL W/ R /G %D . - \ / / / t 1 \ LIP\ LE°,VEL SPREADER.\ \ f \` \ �\,� SF,1.E� I�ET A14, THIS ;SHEET..• :> aLF= 1oo'�� to I . 11 \ I L = _02' W 12, 9 =2. . \ \ / AELEV. -3' '' * U / N ■ ■ M \ \ 1 1 l ' ( I I \ \ APPROVED BLK �, PROPOSED BLK 13 & FUTURE BLK 13: • ;-o \ v 1 I I I � t ' � 1, 0 v 1(DRAINS TO 7HE NORTH, UCKINGHOLE CREEK, 11 •C #1 t 1 � 1 = 6i� \ AFTER W,AIEI? QI�AUIY 1REATMENT & DE7F.N77ON \' L \ ` \ \ ' ` \ \ CF -175' 1. IS PROW00 Y THE BIORETEN770N BASIN) 1 \ / \ ' TOTAL AREA: 13.17ac. L1F�LEV. -i3' ' \ /� -� \ \% MPERVIOLS- TER QUALITY) t _ -- `- ' � , \ ' \ �N =�6 & ' ENIYON) f r - a t x ra'li / 1 � 1 - - \ - 1 . �;:..:s / :'q ,. ,x .r. .,i , , v r .,r v ri, ., Y_tf.@ a ,,,; -, , ,r -. :w .. Yx / :./ -- -' > \ tit. x w .. d.. ,,,,,�: ry e.'.�.. 2- s tt ,. Y:.,> :.,�. �' k r -f. , ».. -,, .: ro, x,..J•'• r' s +, Ji k .tS :45 M i.!'",�`_ \ • -..T :. ssl.�' ;.. u. > .A { 5, €,. _S s s'. i'� :i' ° ::t,,F,'z."G'r tt r; t. }L.s, ... l` ,rhos <�Lk,i,"'r £'^'�' .''+y't. ,.:. - ,.Se".,.. a.. " \ \ 4 r a.7' aps,tt.. :s�,,,t 1 pL?t.t ,,­­!11_ a`+°:" t.. a.. �,.z , s. §- y',: ✓ ) :, r :? :� a / \ w .a,, m.. >r# r"Yt k'�i, at` t:itr- 2c.,,::r. s,+" +.,, ,ti, 3 r Iva, `rF," �.1. 'x \ :1 (, . i v' z,., ,. Y ':.>k t -.:> 1 - r;:5t'A Y kx :rr ,,,'. #..r. `;i > &v..,�, _y ,,f. ,,,'4s.r. "`Y:�"`� __ \ :' =t x, ,L s::: i a >. 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J 4 r`" r, 'S �Y y /s�xr t L s 0 // /// z _ : %� i % /// / 1 9 r S , -\ yra 4 {n GP1 Gd is .:t a n &,/r3 f"1'" ;uLY •< / /�^_-.._ -,- ibo 1 // / / - - - t _ '{ , i �x {,"x ? G /'�y:'aax'T.,r,' ,�✓ v - _v VAS - -` /' ',� / / / / / /' >b 111111-1 "L' i �a r ;'h' . S a:_r3' -�. A, ,\ _ `o !� ' ,,� _ ! / it s:gs rr {x ) r!? ^° / _ /6: _orr, - / ' °� 5 t .0 r r"- ,,.,r,t. �,�� -- .- / '' -. - rs i, �:..,;. I *l `1f .,� , ,�.-_- - - / ! t s / A \ v / / r J b -r I , / an- r •fl % K' P x*�k L� \ / / / 5 / �. � _ / }i 4f�11� ^t / / �/ 'F -._ _ / 1 .pry /I I / 1� / - 1 / /,`/ 1r / ' E - / / ] / / _ l ?e " E., t 5 / i i r r Y / ,' / / a / r'��/ , z / / / ° f :c ... : ... , / / / / /// / ., , / r a.,t 'f frx"tr'liVK'�J {ftJ �\ _ ..,�. a �p I I / , __ . e . .... ........ F, ::: , ,- , , t ,: / �� yrl- r R` . , r:, P `_. �I +G ' 7 . . •fa ,r ��, `. � � 1111 � �Ti %. i . �� �,. _ � l e _ _ I Ill l I �fI 5- 1 i L: � 1 1 1 i_ 1� -++..■ A f I _ r ,7 I i _ _. __�,�wl, I I6R�1 I I - - II I 1 I n �JI - - -- I _ +u..■. I 1111 I C 7 _ HIM ­ ­ r e e 1, BL I i 1 X11 ■ I r )1 pr • Y g} ■ ; , , . ; ,,, . ��ir 9 1 I•• 1 ll' I 1 I 'r • 1 L p �• �z '� • ei , ,► ■ :,rl r �I f hLl' 'j ...... 'i 3� =:. 1 I� �i -r�r�r �r I / , I/ / r rI I I III II 1 \ - -- _./,/ .. //, I I 1 ! I I I I �, I I // y // r I I I , I I °I - _ /' / / // � / / -_ I II ICI I <€ I ( / ' / i i /.i / / r / \ \ I I I', I ( ` II '/' % / / /i/ / �, / ! I 1 1 1 1 1 \ i / /// I I 1 1 11 11\ / r// /// / // i / I I I I I I \ \ / / / / / I I , I I I , I _­ / / / / ' / I , I I I 1 _ / / ; / / / I / / I' l 1 1 1 1' // / 11 I I I i I\ „ I I 1 \ \ \t / / I 11 I I I y t A / / / I { V G A A / r' A I I I i \ \ / / / \ 1992 3.21 LEVEL SPREADER CROSS SECTION JUTE. OR EXCELSIOR OR STAPLED IN PLACE VARIABLE (MIN. 7') BURIED B" MIN. B" MIN. BURIED W MIN. LEVEL UP OF SPREADER 2:t rR FLITTER 4PG 6' LEVEL SPREADER WITH VEGETATED LIP CROSS SECTION VDOT /3, 357, j5, li56 OR 07 A74ECATE IN VARLABL.E (MIN. 7') ft GALVANUED WIRE MESH BASKET SECURE WIRE MESH TO TIMBER , FILTER CLOTH BXB TREATED TIMBER SECURE WIRE TO GROUND G MIN. WITH WIRE STAPLES ""5 REBAR TO B T MIN. 3' UNDISTURBED �t p :t OR SQL - FUTTER 1 41Ft S. LEVEL SPREADER WITH RIGID LIP - MIN. PHYSICAL REQUIREMENTS OF FILTER CLOTH NOTED IN STD. Lt SPEC. 3.t9, RIPRAP I f 1 t \ _ / / i I } Source: Va, DSWC and N.C. Erosion and Sediment { 1 I ` ` - � / / ! Control Planning and Design Manual Plate 3.21 -2 / I \` \\ \ \ / ., / // \ 1 , / / / // III -195 \ \ s \. . . I =-- FUTURE POR77ON -OP BLOCK 13,DWNS TO THE / - �NORTtti LICKINGHOLE CREF,.K) AND IS NOT PART \ �� 1 r OF T ,HISS OF PLANS. HOWEVER, 0 a Even THE BroRereNT7 N BASIN IS`DESIGNPD-T 0 HAN D E TT 1`UT RE DEV LOPMENT s r U E \ S '_ IMPS VIOUS A EA H W R BOT ATER' UA - DETENTION, f & I Q �' I - , ,/ I \ , S TORM WA TER MA NA GEME-N T NARRA Tl VE- / _ !Mr,i \ \ \ / / /\\ 1 1 \ \ \ 1 THIS SITE SHALL DRAIN TO THE PROPOSED BIORETENTION BASIN TO THE \ 1 1 \ \ / ry; ,F ' .�d1 / \ \ \ \ NORTHEAST, WHERE THE STORMWA TER RUNOFF SHALL BE TREATED AND / \ ' � \ �' DETAINED PRIOR TO OUTFALLING INTO LICKINGHOLE CREEK. THE \ \ ' l \ BIORETENTION BASIN IS DESIGNED TO TREAT THE APPROVED BLOCK 2, 6 5 I! /I 11 \ THE PROPOSED PORTION OF BLOCK 13, AND THE FUTURE PORTION OF f *I 11 ' / ' I '" BLOCK 13, AS SHOWN. I / / / I I I / -� 1 /I ' ' ' / / � THE PROPOSED BIORETENTION BASIN SHALL HA VE A R EM 0 V A L ( EFFICIENCY OF 65% BECAUSE THIS SITE IS LOCATED WITHIN THE UT REP F K 1 DRAINS E- � U OR7IION O BLDG 3 .RAY S 7/0 1 THE SOUT B CREEK) AND E W 5LA TOWN E I�' O E S CROZET COMMUNITY, AND THEREFOR LIE WITHIN THE LICKINGHOLE e NOT ART OF THIS $ET OF PLANS. \ \ .' , CREEK DRAINAGE BASIN, THIS SITE IS LOCATED IN A WATER RESOURCE I 1,11 1 \ 1 AREA. IN ADDITION, THIS PR OJ E CT IS D ESI GNED TO DRAIN 1009 OF TH E E ,I . \ I- _ \ \• I I Ii j PROPOSED RUN -OFF TO THE BIORETENTION BASIN. THE BIORETENTION r 1 / I s BASIN SHALL SERVE NO 0 A STOR A FACILITY, T 1 T ONLY AS MW TER QUALITY ACIL TY l I Q / D SHALL PROVIDE DETENTION AN OUTLET PROTECTION R J . �•. I / / N D TE TION FO THE PRO EC T. ' I I I I / l I WATER QUALITY FOR FUTURE PROJECTS MAY BE ACHIEVED WITH THIS / BIORETENTION I BASIN AS IS EVIDENT IN THE OVER SIZING OF THE 1 I /I / / FACILITY. FROM A WATER QUALITY STANDPOINT THIS FACILITY IS I / I / / / CURRENTLY DESIGNED TO HANDLE 335, 000s f OF IMPERVIOUS AREA (59. � I I I , OF 335, OOOsf -16, 750sf MINIMUM FLOOR AREA). ONLY 234, 520sf ARE ' A CCOUN TED FOR WITH THE APPROVED BLOCK 2 PLANS, THE PROPOSED ' // I I ;/' \ �- I `�'1- l I PORTION OF BLOCK 13 WITH THIS SET OF PLANS & THE FUTURE \ \' /I/ / ; ' ,I / / I ° T I \ \ 1 PORTION OF BLOCK 13. THUS, OVER 105, OOOsf OF IMPERVIOUS FUTURE ' ' \ � 1 I / I 1 \ '`�\ ' DEVELOPMENT CAN CONTRIBUTE TO THE BIORETENTION BASIN AND -- "- 695 - r / ' ; h 1 I ` \ ,, RECEIVE A REMOVAL EFFICIENCY OF 65°0•. { 4 I r P l I \ FUTURE ON 0 FLOCK 4 DRA�IVS 1 / I I I � I \ TO THE NOR H ( CKI 9HOLE CREEIC�`T0 % / I 1 I , TERANDI0N8 IN IF RTREAT OFPLANS. � FUTURE BLOCK I� I � ' / HOWEVER, FROM A STORMWA TER DETENTION STANDPOINT THIS FACILITY AND IS NOT A F 7IIS SET OF PLANS. DRAINS TO THE SOl fTH i I I I I >: \ (SLABTOWNCRE K) / / I IS VIRTUALLY COMPLETED UTILIZED. THOUGH FUTURE DEVELOPMENTS __ , I ; / ANDISN OF S. ,' ,' / / OUTSIDE THE SCOPE OF BLOCK 2 AND 13 CAN UTILIZE THIS FACILITY -- _ �_ THIS SET OF,PLANS. / / , / , 'I I __._. -- - --� - �- ____�- _/ / / / FOR�WA TER QUALITY, THEY WILL � HAVE TO ACHIEVE STORMWA TER - �- : - I :. -___ / / - _. _ _ - _ -- - - 1 I J ....................... :•, :,. -,. , 1. \ / / \ \ / � 1 , s::. .:.. t -- - - 1 � I `tee _ \ :::::. I / - 1 i % 1 / \ / - y _ 11 I - _ t ,eel•°°• 1 / - / I ` - I l , / / / ' / , / / % / / / ' ,\ :.;.: <::; `: LANDSCAPING LEGEND: Abb. Scientific Name: Common Name Size Root Type Remarks Quantity MYPN M rica Pens Ivanica Northern Bayberry 18 " -24" spread Cont. Dense/ Full 35 NSY N ssa S lvatica Black Gum 2" cal B &B Single Leader 6 VBDN Viburnum Dentatum Arrowwood 3' -4' ht B&B Dense/ Full 18 fudge factor 1.00 fudge factor 1.00 Viburnum routed true routed true routed true peak flow (cfs) 21.359 HVI Hamamelis Virginiana Common Witchhazel 6' ht B &B Single Leader 6 AN Andro 0 on Gerardi Big Bluestem 4" pot Cont. ROAD EXCEEDS 107., A 224 PV Panicum Vir atum Switch Grass 4" pot Cont. 39 AP /FR Seed mix: 50% Agrostis Autumn Bentgrass & seed Per 7575 s.f. Perennans, 50% Red Fescue manufacturers Festuca Rubra recommendations Wildflower Seed Mix seed per 3165 manufacturers recommendations {1�a� I 4sk °1�•r1 c S. izn W7 VDOT STD. EC -1', CL. II DRY 1 I 1 RIP -RAP w/ aOTEXI LE I I FABRIC UNDERLAYMENTI TO v\ J r r z CONNECT CONC. WEIR LEVEL\ SPREADFR. ! I y� I ('35'Lx2'D) WEIR SIDE 2' R €CTAIYGI%LAR C�ONCRE7E`�/ SLOItS= 2:11 1 0E1g1SP1UWAY -_ W-2' 'Q =2.q, L�-16" 75 {aa i \ \ RN r ELEV.= 6480 M\ --F 5E 3' MAX.. x�z�Y�F��. "'rkrxr � 4�������'�' +,'mil $f {• ,r .._ __ "� _. / .�-- --�'"- p:)z < r EtZ�45'TF 5 ��..y 5' 4 r " ni? -6 �8 FOREBAY TOP OF DAM ELEV.= 647.0 COMBINED FOREBAY VOLUME PROVIDED --` - $;7006f / -5' -WIDE FOREBAN - WEIR ELEV.= §'45. _YVEIR SIDE- SLOPES= 2:1 r ROUTING CALCULATIONS • INFLOW HYDROGRAPHS •S 1 Year Event- SCS Method 2 Year Event- SCS Method 10 Year Event- SCS Method Area (acres) 13-170 Area (acres) 13-170 Area (acres) 13-170 CN 76.000 CN 76.000 CN 76.000 Type 2 Type 2 Type 2 rainfall, P (in) 3.500 rainfall, P (in) 3.700 rainfall, P (in) 5.600 time of conc. (hrs) 0.1400 time of conc. (hrs) 0.1400 time of conc. (hrs) 0.1400 time increment (hrs) 0.0200 time increment (hrs) o.o2oo time increment (hrs) 0.0200 time limit (hrs) 30.000 time limit (hrs) 30 "000 time limit (hrs) 30.000 fudge factor 1.00 fudge factor 1.00 fudge factor 1.00 routed true routed true routed true peak flow (cfs) 21.359 peak flow (cfs) 23.657 peak flaw (cfs) 47.522 peak time (hrs) 11-935 peak time (hrs) 11.93S peak time (hrs) 11-935 volume (cy) 2415.178 volume (cy) 2674.952 volume (cy) 5373.527 -- PROPOSEb LEEVEL SPREADER AT BASIN OUTFALL. TRANSITION LENGTH =zo' Qa Q ELEV: 640. §S iw /A o% SLOPE. 6" WIDE CONCRETE, RIGID LIP Q ELEV. 641.45 SHALL �✓ CA,F: � N RE .{ i BE DOW S H z ' EAM OF THE o T ANSIT 1 R ION LENGTH. RIP-RAP RA DOWNSLO � PE OFTHE CONCRETE LI 1'7=30' U SHALL BE 'LO G N AND SHALL BE PLACED ON EXISTING, � \ 1 1 UNDISTURBED EARTH wl DOWNSTREAM SLOPES <1o%. CONCRETE LIP SHALL BE MULCH GROUND COVER K, YED INTO TTHE EXISTING GROUND & SHALL BE LEVEL TO ENSURE PROPER LEVEL WITH JUNIPER \ ` \ READING OIF DRAINAGE. \ PLANTINGS 10' O.C. FOR \ / THAN LOPES GREATER \ \ FLIZW \ EE \ \ 1 D » \ A [» C D 0 I 2 ` rl 1:: " S• FI % OF / C'y _ :x s � t•' - •t. Ef 6 I � eirIVIBINED MINIMU • FORE BAY OLUM -- y E- •S "" RE D 4 S6cf 3 9 ,p _ 3 h V S y S 0 r / ' / VDOT -r S II TYP T S D. EC CLASS q O N{,+ _ RIP -RAP WITH FILTER RLC / UPIDERLAYMENT \ \ 3.75'(W)X3.7S'(L- )x2'(D) MIN. r NON�IGRA COVER SLOPES REALER - _ :;* TYP. DN EMERGENCY ACCESS. IN - - 115 -AN, 5'0-C - AREAS WHERE THE ACGESS- ` ;; ':; : • ... ROAD EXCEEDS 107., A GRAVEL BEDDING SHALL BE - - - INSTALLED. r• ROUTED OUTFLOWS 1 Year Event- SCS Method inflow (cfs) 21.268 at 11.94 (hrs) discharge (cfs) 8.364 at 12.10 (hrs) water level (ft) 646.671 at 12.10 (hrs) storage (cy) 1489.645 2 Year Event- SCS Method inflow (cfs) 23.555 at 11.94 (hrs) discharge (cfs) 9.509 at 12.10 (hrs) water level (ft) 646.776 at 12.10 (hrs) storage (cy) xS6S.589 10 Year Event- SCS Method inflow (cfs) 47.318 at 11.94 (hrs) discharge (cfs) 21.946 at 12ao (hrs) water level (ft) 647.728 at 12.10 (hrs) storage (cy) 2287.114 PVC UNDERDRAIN, SPACED PER PLAN, SLOPE TO DRAIN NORE7TWION FILM SECTION N TS 4" SOLID PVC CLEAN -OUT PIPE. CLEAN -OUTS TO BE PROVIDED AT THE END OF THE UNDERDRAIN PIPING AND ALONG THE UNDERDRAIN SYSTEM EVERY 50' O.C. NOTE: AFTER THE CONSTRUCTION OF THIS DEVELOPMENT AND THE FUTURE PORTION OF BLOCK 13, THE IMPERVIOUS AREA CONTRIBUTING TO THE BIORETENTION FILTER IS ESTIMATED TO BE 234,520sf. THE BIORETENTION FILTER SHALL BE DESIGNED TO TREAT 65% OF THE IMPERVIOUS AREA. THEREFORE, THE BOTTOM OF THE BIORETENTION FILTER SHALL BE SIZED TO 5% OF THE IMPERVIOUS AREA. 5/"." OF 234,520sf EQUALS 1 1, 726sf. THE BIORETENTION FILTER FLOOR AREA EQUALS 16,897sf. THE BIORETENTION FILTER FLOOR AREA IS SUFFICIENTLY SIZED TO HANDLE THIS, AS ARE THE FOREBAYS. THE REMOVAL, RATE REQUIRED FOR THIS DEVELOPMENT IS 45 %. FUTURE DEVELOPMENTS CAN UTILIZE THE PROPOSED B10FILTER, IN CONJUNCTION WITH CONTRIBUTIONS TO THE PRO -RATA SHARE PROGRAM, TO MEET WATER QUALITY REQUIREMENTS IF ADDITIONAL DETENTION IS AVAILABLE FOR FUTURE PROJECTS. FOR THIS DEVELOPMENT, 0.25" OF RUNOFF PER 1 ACRE OF IMPERVIOUS DRAINAGE AREA GENERATES A WATER QUALITY VOLUME OF 4,886cf. THE FOREBAY VOLUME PROVIDED IS 8,700cf. THE SOIL AROUND THE SPILLWAY 1S TO BE AT 95% COMPACTION WITH AN IMPERVIOUS CORE AND CUT -OFF TRENCH. THE SPILLWAY AND DOWNSTREAM OF THE SPILLWAY WILL BE LINED WITH VDOT STD. EC -1 CLASS II RIPRAP. THE VEGETATIVE COVER ON THE DAMS AND AROUND THE POND BANKS WILL BE SOD- FORMING GRASS. THE DEPTH OF FLOW, Hp, IS EQUAL TO 1.28 FEET DURING THE 2 YEAR STORM, WHICH FEATURES A FLOW OF 9.51 cfs. AS A RESULT, THE FINAL STAGE ELEVATION OF 646.78' FOR A DEPTH OF FLOW OF 1.28' ABOVE THE SPILLWAY CREST ELEVATION OF 645.50' HAS A FLOW OF 9.51 cfs. FOR CONTOUR AREAS, ELEVATIONS, STORAGE VOLUMES, PLEASE SEE: THE ROUTING CALCULATIONS PROVIDED WITH THE SUBMITTAL, OR SHEET SWM -2. HYDRAULIC DIMENSIONS AND COEFFICIENTS FOR THE WEIR /SPILLWAY ARE 5' WIDE BY 2' DEEP FOR THE FOREBAY AND 2' WIDE BY 2.50' DEEP FOR THE PRINCIPLE SPILLWAY. THE WEIR COEFFICIENT FOR EACH OF THE SPILLWAYS IS 3.3. THIS DATA CAN ALSO BE VIEWED ON THE ROUTING CALCULATIONS PROVIDED. 10 YEAR W. S E. =647.73 2 YEAR --'\ W. S E. =646.78 \ PRINCIPLE SPILL WA Y ELEVA TION= 645.50 2.0' TOP OF DAM WIDTH= 10.0' AT AN ELEVATION= 648.0 NOTE. CONTAINMENT & 1' OF FREE BOARD ON THE 2.50' 100 -YEAR EVENT IS NOT REQUIRED DUE TO THE EMBANKMENT HEIGHT. 2' WIDE RECTANGULAR CONCRETE WEIR /SPILL WA Y PRINCIPLE SPILLWAYS N TS 10 YEAR W. S. E. - -647.7 3 2 YEAR W. S E. = 646.78 N � � TOP OF FOREBA Y DAM 10 YEAR WIDTH= 3.0' AT AN W. S E. =647.73 ELEVATION= 647.00 2 YEAR W. S E. = 646.78 r, _ - -___ -- _.- .- __.,. -__. -- -- _ ti 2.0' if- - -- V O T TD. EC CL. ll D S 1 DRY FOREBA Y SPILL WA Y 5.0 RIP -RAP LINED EMERGENCY ELEVATION= 645.0 SPILLWAY WITH GEO- TEX77LE UNDERLA YMENT FORE BAYSPILLWAYS N TS 3' WIDE FOREBA Y TOP OF DAM ELEV. = 647 0 CLEAN -OUT W/ 10 YEAR TERT TIGH 3 » W A OF PEA GRAVEL CAP 50' 0. C. W S.E. =64Z 73 SHALL BE PLACED ELEV =645.50' 2 YEAR IETWEEN THE FIL TER (TYP.) W.S.E. = 646.78 MEDIA AND THE UNDERDRAIN MEDIA ;c SLOPE �i 4,x4,. 0.50' 'i g r.x Z..i , q y7 hn ^ 3. i. 1.5, MIN. BO TTOM OF FOREBA Y 642.00 5' WIDE ROCK WEI ELEV. =645. 00 BOTTOM OF BIORETENTION-"' BASIN 641.0 MIN. UNDERDRAIN GRA VEL- (AASHTO M43 MIN. 1 ABOVE & BELOW UNDERDRAIN PIPE) 10' WIDE TOP OF DAM ELEV. = 648.00 WEIR ELEV.= 645.50' 3' MAX. EMBANKMENT HT. 2' CONCRETE WEIR /__�W =2; D =2.5; L =16' W -> 0.50' OF LEVEL SPREADER. SEE PONDING THIS SHEET FOR DEPTH ADDITIONAL DETAILS 10.0 MIN. -ELEV = 645" 50LF ©0.59 6" PERFORA TED SCHEDULE 40 UD INV. ELEV. = INV. OUT -- 640.95' PVC PIPE OR EQUIVALENT AAA2. 641.20' MIN. 6' WIDE & 8' DEEP 1.09 SLOPE (MIN.) TO OUTFALL STATE APPROVED MIX. TOP ELEV.= IMPERVIOUS CORE & PIPE PROVIDED ACROSS EN77RE 645.00 (TYP.) DEPTH= 2.5' MIN., CUTOFF TRENCH WITH 1 :1 WIDTH 0 20 O.C. SLOPE= 0.009 .SIDE SLOPES. SEE DETAIL ON THIS SHEET. BIORETENTION F'IL TER (NOT TO SCALE) T 0 SCOT?o. COLLINSZ Lic. 035791 ,�h,. �, (' (2d 10 � �� 1SIONAL E Z O a fACe r_n co a Z o c=n Q Z ..i O W H i� W Ce 0 w o D 0