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WPO201900023 Plan - VSMP WPO VSMP 2019-09-13
k RIO HILL STORMWATER RETROFIT VSMP/WPO 201900023 ALBEMARLE CO.UNTY, VA PROJECT NARRATIVE THE PROPOSED PROJECT IS A COUNTY WATER RESOURCES PROJECT TO CONVERT THE EXISTING DRY DETENTION POND AT THE RIO HILL SHOPPING CENTER INTO MORE OF A STORMWATERWETILANDS. THIS WILL BE DONE BY ADDING I NTERNALWETLAND ZONES, ADJ USTI NGTHE FLOW PATH THROUGH THE BASIN, MAKING MODIFICATIONS TO THE OUTLET STRUCTURE TO RETAIN MORE WATER DURING SMALL STORM EVENTS, AND ALSO ADDING MEASURES TO ASSIST WITH FUTURE OPERATION AND MAINTENANCE (E.G., ADDING FOREBAYS AND MAINTENANCE ACCESS POINTS AT THE INLETS AND 'THE OUTLET). GENERAL NOTES 1. ALL BASEMAPPING AND TOPOGRAPHIC SURVEY INFORMATION IS PROVIDED BY ECOSYSTEM SERVICES, L.L.C. THE SURVEY WAS COMPLETED IN FEBRUARY 201 B. 2. ADDITIONAL FIELD SURVEYS WERE CONDUCTED BY ECOSYSTEM SERVICES, L.L.C. 3. ADDITIONAL BASE MAPPING OBTAINED FROM VGIN. 4. HORIZONTAL DATUM, NAD83 VIRGINIA STATE PLANE, SOUTH ZONE, US FOOT 5. VERTICAL DATUM: NAVID 88, US FOOT 6. THE CONTRACTOR SHALL CONTACT "MISS UTILITY" AT 811 OR 1-800-552-7001 PRIOR TO ANY LAND DISTURBING ACTIVITIES. 7. ALL WORK SHALL BE IN ACCORDANCE WITH FEDERAL, STATE, AND LOCAL STANDARDS. 8. ANY WORK THAT IS REQUIRED FOR THE SUCCESSFUL COMPLETION OF THE PROJECT AS SPECIFIED IN THIS SET OF PLANS BUT NOT SPECIFICALLY ADDRESSED IN THE PLAN SET SHALL NOT RELIEVE THE CONTRACTOR OF THE RESPONSIBILITY TO COMPLETE SUCH WORK. 9. THE PROJECT DOES NOT INCLUDE THE ADDITION OF ANY IMPERVIOUS COVER. NO INCRIEASE IN RUNOFF WILL RESULT FROM THIS PRbJECT. 10. NO WORK SHALL BEGIN WITHOUT ACQUISITION OF ALL LOCAL, STATE, AND FEDERAL PERMITS AND APPROVALS. 11. THE CONTRACTOR SHALL CONTACT ECOSYSTEM SERVICES, AND ALBEMARLE COUNTY FOR A PRE -CONSTRUCTION MEETING PRIOR TO ANY LAND DISTURBING ACTIVITIES. 12. SHOULD A DISCREPANCY BE FOUND IN THE PLAN SET, THE CONTRACTOR SHALL CONSLULT WITH DESIGN ENGINEER PRIOR TO COMPLETION OF SPECIFIC WORK. 13. ALL GRADING ACTIVITIES SHALL INCLUDE REMOVAL AND TEMPORARY STOCKPILING OF -TOP SOIL, EXECUTION OF GRADING, AND REPLACEMENT OF TOPSOIL TO ACHIEVE FINAL GRADES. 14. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ANY DAMAGE TO EXISTING CONDITIONS ASA RESULT OF ITS WORK PERFORMED DURING THE CONTRACT PERIOD. THIS RESPONSIBILITY SHALL INCLUDE RE -SEEDING DISTURBED AREAS AND TEMPORARY ACCESS ROADS. 15, THE CONTRACTOR SHALL KEEP ALL EQUIPMENT AND STAGING MATERIAL INSIDE THE LIMITS OF DISTURBANCE UNLESS PRIOR APPROVAL BY THE PROJECT ENGINEER IS PROVIDED. 16. CLEARING & GRUBBING SHALL BE CONFINED TO THOSE AREAS NEEDED FOR CONSTRUCTION ACCESS AND GRADING AND SHALL REQUIRE ALBEMARLE COUNTY APPROVAL. 17. UNDER NO CIRCUMSTANCES ARE TREES OVER 6 INCHES IN DIAMETER TO BE REMOVED WITHOUT PRIOR APPROVAL FROM THE PROJECT ENGINEER UNLESS OTHERWISE SPECIFIED WITHIN THIS PLAN SET. 18. IN CONFORMANCE WITH DPOR REGULATIONS, SECTION 54.1-112 INVITED BIDDERS MUST DISCLOSE (1) WHETHER BIDDER IS A RESIDENT OR NONRESIDENT OF THE COMMONWEALTH, (11) WHETHER THE PROPER LICENSE OR CERTIFICATE HAS BEEN ISSUED TO THE BIDDER, AND (111) THE INFORMATION REQUIRED OF THE BIDDERT&SHCiW EVIDENCE OF PROPER LICENSURE OR CERTIFICATION UNDER THE PROVISIONS OF THE ABOVE MENTIONED CORRESPONDING CHAPTER. VICINITY MAP PROJECT INFORMATION 1. CLIENT: ALBEMARLE COUNTY CONTACT: STAVROS CARLOS PHONEi 434.296.5B16 EMAIL: SCALOS@ALBEMARLE.ORG PROJECT AGENT: ECOSYSTEM SERVICES 2. PROJECT ENGINEER: WILLIAM MUMAW, PE ECOSYSTEM SERVICES 1739-A ALLIED STREET CHARLOTTESVILLE, VA 22903 CONTACT: WILLIAM MUMAW PHONE: 540.239.1428 EMAIL: KIP@ECOSYSTEM SERVICES. US 3. PROPERTY OWNER: ROSENTHAL PROPERTIES 4. TOTAL ACREAGE OF DISTURBANCE: 2.02 ACRES PROJECT WATERSHED: RIVANNA 5. HYDROLOGIC UNIT CODE (8-DIGIT)-. 02080204 6. CLOSEST PROPERTY ADDRESS: 1740 RIO HILL CENTER 7. PARCEL ID: 04500-00-00-094AO Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 PROPOSED LAYOUT 4 ESC NOTES & SPECIFICATIONS 5 ESC NOTES & SPECIFICATIONS 6 DETAILS 7 ESC PLAN - PHASE ONE 8 ESC PLAN - PHASE TWO 9 ESC PLAN - PHASE THREE 10 ESC DETAILS 11 ESC DETAILS (2), 12 DETAILS 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices.us 9/4/2019 wull" xnqjm MUMAW 51 —4 M N C) C) C) C) N 0 CL X W. g ry LLJ APPROVED by the Albemarle County Community Development Department Date File > N; z ... ............... ..... ...... ON;. Uj ry < .......... . . . . . . . XXX..". H rsch a Water & Uj Environmenlc,, LLOC x Stormwater.& Steward5hip ............... �`M k 4 Xi::M ell, EXISTING MAJOR CONTOURS (5') r EXISTING MINOR CONTOURS (T) QURB INLET V_ij �_MSTtNG T 1�0 PARCEL BOUNDARY473~6 _� ` - - -' - - 0 \ \ v a„ j 48" CMP EDGE OF CURB/EDGE OF ROAD E;��[S_ �TEWERM AKH.OLE _j EXISTING STORM PIPE PARCEL ID: NA OWNER: VDOT BUILDING r "N EXISTING DI-7 YERT 462.66 BENCHMARK Apt_ - — — — — — — -STEEP SLOPES BOUNDARY —'You GUARD RAIL 8"CMP(U QkNFIRMED) 4D OUTLET STRUCTURE DETAIL FACING NORTH RIGHT OF WAY\ /Z &O EASEMENT BOUNDARY J XIISTIN(& R`AI!5jED '-RUVUR T ST '__I! 1.75 FT el E; SE '-�ETAIL 7 Q. 8, FT r f TIIIG 24& INLE' < < 'pV'E4T J4,7 .0 :Z:Z1 t S L(DtD E J X4,SZING 30'_"X-49�4_�PTIQAL J CONCRhT`IE_QUTLE1�,,, f r INVERT 466.5 X j OWWR: ALLEN & NeE r PARCEL Ip11_Dde00-00-&0-093C0 (IES/ LN PROPERT H X r" Av OUTLET STRUCTURE DETAIL C p U)``, r T, FACING SOUTH J/ /'y i /M� CIE N/( WAR-BRA4- r P�✓ jL(pP El 1.75 FT Y_ b )Ifa EXISTING CHA EL J 0.88 FT > E;�ISTING 24" �GR INLETNVERT 468.,) 0 + (y) EXISTING �q'& INLET , IN RT 47� N 1141 PAR�%6D: 04500-00-00-094CO F -HOLDREN, NJEAN OVX R. BM-1• N, EXISTING SEWER _�-----RXISTING_42-RQPI MANHOLE 499.14 --ffNWVERT 1. 1 U) U) N, Lu EXISTING r C) N INVERT w U) w •MA N OPE- — =482 ->< co U) 0 0 w C -I-- CES CNARL ASU MCN� UT COUNT'y -471.33-— — — 7 04 EN C:) IR OB L-WITED S7 0) 9 ARLE V rl)�"EN _f�s7AT C) (y) 0698 ND L0 EXISTING STORM DRAIN cy) INVERT ELEV. UNKNOWN 0 It < U) w EXISTING STOR 0 INVERT ELEV. UNKOWN < :c IN C) N.- w w PARCEL ID: 04509-00-00-094A0 cr OWNER: ROSENHAL PROPERTIES U) cl j _j N 61 _j HILLS CENTS� EXISTING STORMDRAIN` a�,, t i r J ~ 1 �' INVERT ELEV. UNKNOWN' _j _j A > GO ji 10 Q �y \J/ 01 V 20' 20' 40' NORTH SCALE: 1 20' Hirs.chman Water & Environment, LLC Stormwater & Steward5hip A 0 00A 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosysternservices.us RALTRn ' wull" XR)UNG METMAW Um Na 04M H 0 U) Z Lu p 0 Lu F_ z z Z) Q O 0 W. 2 (D j Z < 0 2 w U) W < I X .j w O ry 0 U) w ............ PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT#-. 17-0042 DATE: 3/1512019 SHEET: �. --- EXISTING MAJOR CONTOURS (5'), — — — — -- EXISTING MINOR CONTOURS (T)'YOU PROPOSED MAJOR CONTOUR LINES (1 FT.) PROPOSED MINOR CONTOUR LINES (1 FT.) — PARCEL BOUNDARY i EASEMENT PARCEL ID: NA } - OWNER: VDOT / ? 4 ROCK WEIR `_ -- .••..' d --- --` f "` � � ``' .� '-`', �.. "°°�� � , I '`,>•.� OUTLET STRUCTURE DETAIL 1 " FOREBAY OUTLET0(d ' - - / .d _' _ __ _ 1 -' `. `" • �Y `` - t _ ,, FACING NORTH ` (SOUTH ADJUSTED TO SAME DIMENSIONS STEEP SLOPES BOUNDARY f .4gpg 80 17 , f l !/dJ 1 s f/ f f J f f / r 1 —� a _/11NTEJVAkCIE ,, ,� j°� // f f ! '' ' CAUSkVVJ�`(.4," #1 S-TI-f�rri;,) \ '� �•~.�A``� , /' M.C. TQ�472 /f WDfIVWNT YOjREB Y�T# i -, TOFF=470 ) G. I" '' '` �_ �, �' EXISTING GRADE / ECISTII 30"'at 19 El.LIRT C . `\ "M 4'b5- �, nf�6R TE �7 TL�`T�V�f REZC} �S �- I / A` / J fl f / / ! / 3 � �, `� 18 M TE PROPSOED I( RT - 6.59 GRADE W&06: .DB -CO l�f CF � H B1 , O� I ,%/ j, `, i /I J J I j j , / % ( �,.� C�ASS\1 RIP`TAJ�RTH'QF3, '�J1!!o r�T�L'�"�I �tER.. N �7Ps.'AM 1`45 "Y'/ PARCEL ID__0AJ500-00-00-093C0 \ / f f ! 1 r / i 1 d ''i e°% \ 1 1 \ `,. ` ` -. \ - �. l _' "ti-. -,� \ -OW�,NE'R: ALLEN &AkL-LN PROPER (IESJ )OREBAY OUTLET (TYP) `' .•,,. '` ~•--. ,. ". � �r ..,1 j I � � I 1 � d l � � � l � f I V�I 3 � � h. � � n � � '� ~. � ~,,.. ''' ' �. ``' �. ti � � \, ti.,. -.' •... -` -.. `` ... -. '>. � '`- -... \. `-.- o � ' .. -' i-•- _r °`� ...--' r '°s f � ! I I ( I J � { ` j I I � � � / 1 � �, � , ; . -, / --' �„ J ,. �`~.,�, , o o`t,,. ~- `` �. `� \ °� '� ,,,�`� / ._.-- �:-'' +,,. � �- -� �. � .``~- rv-- ~-- .,,,,, .-_. ~\, `4 Rk G f R RA INA ' ..� ``' � . '' .. -� .,... �...J, � � 1 r d � (�T IR7�)� .� � ! { d i � �y , � / �\� '� -' \ � � a,,,� 'a \ � �, \ '�. l \ '`.--•-- ``"" -.. ,.. .., ..._ ". -•-. `. �, -•-.... V (d l 1 ` I 1 ' I i I 1 �'` - a l r� t , ,� \ S t, �, `, ,� `�• °< \ ° °� / r --w—, - - {�, ff PARC 1' ID: 04500-00-00-094C0 'TOP=4'Til 0U�[R: HOLDREN, N JEAN INV U) 0�. -EI�QVEGA'RDI;i�iL '` ,Y ,ry °/ J/f�( ffo. / (I j "` ,-� -''`• (` f�E QE�T`Af _ \ .., L O °1 •`O„- ^..\•+. ` »,,,, s ..,,,. '^.. ~"' ^-^ --•m ,-•._ ,,,,, '. ..*.... ,"' ^-.-..-,.... -9 ""^- -«.. '^+.. -,-.. x ^,,,,, �"'"" ..,._. ,.,� ' ! ,._.,, ^'". i /' �, .✓ d ..,, �I f i f r•' ......" y, - }d '` -"', """°^•._.,..wr""-'"^ "r r• l �0 = _ »" .. "._.--..TM 1"'.'*.. - "`" '^^ �-.." '^ _-..,: e' `" -ter ' ""r�^.. ,.. �''e.; •-w..---• ^^" ..-•. ,,. r ,,_,,... '4`..-.•-.. / + .A :!/ i /� ,/' 4� P ,'"••' -q,.. ,• - IL ~" of CE�R/L CSS DRVO `REMQVEGrARDR wRLLC,, CsS q(ST3R} iSE(SkIET 6} Q1``� / ...•*..'• .� Cr�ARLD kAS�Mr�! % 1' -�""- . 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J / '/ W 094A0 , PARCEL ID: 0450 I i �'w.---.moo \ _. ,;., � _-•---...._'`~• � '--.- `,� `� ----.a_.� '• �. � � `,.--.. `-�` _._"._,...-._ .� 00 00 g ...`` -Y OWNER: ROSENJTHAL PROPERTIES `----M cl —,NJ Rio HILLS CENTER 1 i O�y \ / ( 0 ( 51) i �` �' / `', / / r_ �j ,'` \J �\ - NORTH 20 01 20' 40' "- -l Lu SCALE. 1" = 20' Hirschmater & Environment, LLC Stacmwater & Stewardship 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices. us j III W LT" ERI TATf: MUMAW Lk, No. 04M o -1—.4 -1 `t LL O L.L. W � 0� Q > W >- >- W Q ~ z < a O W U W V O O a. Y W �... p � U^ J ti./ J Q J J ry PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 3/15/2019 SHEET: EROSION & SEDIMENT CONTROL NARRATIVE PHASE 2 U) vi w U w U) w a Q w O 1 ry a U 0 rn m ti T 4 U J J J 2 w H r U) 0 U w PROJECT DESCRIPTION THE PROPOSED PROJECT IS A COUNTY WATER RESOURCES PROJECTTO CONVERT THE EXISTING DRY DETENTION POND AT THE RIO HILL SHOPPING CENTER INTO MORE OF A STORMWATER WETLANDS. IN TOTAL 2.03 ACRES WILL BE DISTURBED FOR THIS PROJECT. THIS WILL BE DONE BY ADDING INTERNAL WETLAND ZONES, ADJUSTING THE FLOW PATH THROUGH THE BASIN, MAKING MODIFICATIONS TO THE OUTLET STRUCTURE TO RETAIN MORE WATER DURING SMALL STORM EVENTS, CONDUCTING NECESSARY MAINTENANCE, AND ALSO ADDING MEASURES TO ASSIST WITH FUTURE OPERATION AND MAINTENANCE (E.G., ADDING FOREBAYS AND MAINTENANCE ACCESS POINTS ATTHE INLETS AND THE OUTLET). THE DESIGN OBJECTIVES FOR RETROFITTING THE RIO HILL BASIN ARE NOTED BELOW: • PROVIDE COST-EFFECTIVE POLLUTANT REDUCTIONS, PARTICULARLY FOR PHOSPHORUS. • ENHANCE THE HYDROLOGIC FUNCTION OF THE BASIN TO CONTROL SMALLER STORMS AS ONE STRATEGY FOR A BROADER WATERSHED CONTEXT, WHILE NOT COMPROMISING THE HYDROLOGIC FUNCTION FOR LARGER STORMS. • PERFORM NECESSARY MAINTENANCE, ENHANCE THE INTERNAL FUNCTIONALITY OF THE BASIN, SUCH AS REPAIRING EXISTING EROSION AND SCOURS, LENGTHENING FLOW PATHS FROM INLETS TO OUTLET, PROMOTE A SIMPLE AND MAINTAINABLE PLANTING SCHEME, AND SIMPLIFY MAINTENANCE ACCESS AND PROCEDURES. • ADHERE TO REGULATORY GUIDANCE FOR POLLUTANT ACCOUNTING AND DESIGN. THE DESIGN TEAM HAS DEVELOPED A CONCEPT PLAN FOR THE PROJECT, AND IS WORKING ON THE ENGINEERING PLANS. BASED ON GUIDANCE FROM A DECEMBER 13 2018 MEETING WITH THE COUNTY ENGINEER AND WATER RESOURCES AND CIP STAFF, THE PLAN SUBMITTAL WILL BE PHASED. THIS EROSION & SEDIMENT CONTROL PLAN AND SWPPP ARE BEING SUBMITTED FIRST, AND THE TEAM WILL CONTINUE TO WORK ON OTHER PLAN DETAILS, SUCH AS THE PLANTING AND LONG-TERM O&M PLANS. AS SUCH, THIS IS A STAND-ALONE SWPPP FOR A LAND -DISTURBING ACTIVITY NOT ASSOCIATED WITH ANY OTHER SITE DEVELOPMENT. A. EXISTING SITE CONDITIONS THE EXISTING SITE IS AN OLD STORMWATER DETENTION PON D BUILT IN ASSOCIATION WITH THE RIO HILL SHOPPING CENTER. THE POND IS ON PRIVATE PROPERTY, BUT THE COUNTY HOLDS AN EASEMENT (INCLUDING A 20, WIDE ACCESS EASEMENT) FOR THE PURPOSES OF PROVIDING LONG-TERM O&M. THE COUNTY HAS BEEN CONDUCTING PERIODIC MAINTENANCE ON THE POND FOR THE PAST SEVERAL YEARS. THERE ARE 5 INLETS TO THE POND, CONTROLLING A 72-ACRE DRAINAGE AREA. TWO OF THE LARGER INLETS HAVE, BASEFLOW, AND THE STORM FLOWS HAVE CUT CHANNELS THROUGH THE BASIN BOTTOM DIRECTING WATER TOWARDS THE OUTLET. SEVERAL FEET OF SEDIMENT HAVE ACCUMULATED IN THE POND BOTTOM OVER THE COURSE OF SEVERAL DECADES, AND THICKETS OF VEGETATION GENERALLY GROW IN DENSE STANDS. AN EXISTING 24" OUTTET PIPE AND RISER STRUCTURE CONTROL OUTLET FLOWS. THE POND BOTTOM APPEARS TO BE FLAT, BUT THE INLETS ATTHE UPPER END ARE OVER 5' HIGHER THAN THE OUTLET PIPE. THE EXISTING SIDE SLOPES TO THE POND CONFINE ITS FOOTPRINT, SINCE THE SLOPES ARE VERY STEEP, WITH OVER 20' OF ELEVATION DROP ON THE WESTERN SIDE. B. ADJACENT AREAS THE POND IS IN THE RIO HILL SHOPPING CENTER PARKING LOT, CLOSEST TO ROUTE 29, WHICH RUNS JUST EAST OF THE TOP SLOPE OF THE POND. COMMERCIAL PROPERITIES AND OUTPARCELS ENCRICLE ALL OTHER SIDES OF THE POND. THE OUTLET PIPE RUNS UNDER ROUTE 29 AND DISCHARGES BETWEEN COMMERCIAL PROPERTIES ALONG THE EAST SIDE OF ROUTE 29 AND RESIDENTIAL PROPERTIES IN THE WOODBROOK SUBDIVISION. A COMBINATION OF ENGINEERED AND MORE NATURAL CHANNEL SEGMENTS CARRYTHE WATER DOWN INTO THE WOODBROOK LAGOON. C. OFF -SITE AREAS PRIORTO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHERTHAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMITA SUPPLEMENTARY EROSION CONTROL PLAN TO THE COUNTY FOR REVIEW AND APPROVAL. D. SOILS BEING ATTHE BOTTOM OF A STORMWATER BASIN, THE SOILS ARE MOSTLY AN INDICATION OF SEDIMENT THAT HAS WASHED IN FROM THE DRAINAGE AREA OVER THE COURSE OF MANY YEARS, AS WELL AS BEING THE PRODUCT OF AN EXCAVATED BASIN. AS SUCH, THE SOIL SURVEY WOULD NOT BE A RELIABLE SOURCE OF INFORMATION FOR THE SITE SOILS. TWO CORE SAMPLE WERE TAKEN AT THE BOTTOM OF THE BASIN. THE TOP LAYER IS COMPRISED OF CLAY LOAM, INDICATIVE OF MATERIAL THAT HAS WASHED INTO THE BASIN. BELOW THAT TO A DEPTH OF ABOUT T, THERE IS A SANDY LOAM LAYER THAT HAS BEEN HEAVILY COMPACTED IN SOME AREAS. BELOW THAT LAYER IS A VERY HARD SUBSOIL (SILT AND SOME SAND), WHICH LIKELY ACCOUNTS FORTHE WET CONDITIONS IN THE BASIN BECAUSE IT FUNCTIONS AS A CONFINING LAYER. DURING THE WINTER SOILS INVESTIGATION, THE WATER TABLE WAS EITHER SATURATED TO THE SURFACE AT THE LOWER END OF THE BASIN OR ABOUT 2.5' BELOW GRADE AT THE HIGHER END. SOILS FROM THE USDA SOIL SURVEY FOUND WITHIN THE PROJECT LIMITS INCLUDE THE FOLLOWING PHASE 2 STRUCTURAL PRACTICES DURING PHASE 2, THE PHASE 1 TEMPORARY SEDIMENTTRAP AND DIVERSION DIKE WILL REMAIN IN PLACE TO EFFECTIVELY ISOLATE THE UPPER END OF THE BASIN. THIS WILL HELP REDUCE THE DISTRUBED AREA FOR PHASE 2. ADDITIONAL STRUCTURAL PRACTICES ARE NOTED BELOW. 1. PUMP AROUND: WHILE NOT A PRACTICE COVERED IN THE VESCH, PUMP AROUNDS FROM INLETS #2 AND #3 ARE CRITICAL E&S COMPONENTS FOR PHASE 2. SEE THE CONSTRUCTION SEQUENCE FOR MORE DETAIL. PHASE 2 VEGETATIVE PRACTICES 1. SURFACE ROUGHENING - 3.29: SURFACE ROUGHENING WILL BE APPLIED TO ALL SIDE SLOPE GRADED OR DISTRUBED AREAS THATARE TO BE STABILIZED WITH VEGETATION, ESPECIALLY THOSE STEEPER THAN 3:1. 2. TEMPORARY SEEDING - 3.31: TEMPORARY SEEDING WILL BE APPLIED TO ALL PHASE 2 DISTRUBED AREAS BEFORE MOVING ON TO PHASE 3. THIS SEEDING WILL BE TEMPORARY BECAUSE A WETLAND PLANTING PLAN WILL ALSO BE INCLUDED THAT INDICATES PERMANENT WETLAND SEEDING AND INSTALLTION OF PLUGS. 3. PERMANENT SEEDING - 3.32: PERMANENT SEEDING WILL BE APPLIED TO ALL SIDE SLOPES ABOVE THE BASIN FLOOR THAT WILL BE DISTRUBED DURING PHASE 2 AND THAT WILL NOT BE DISTURBED AGAIN DURING SUBSEQUENT PHASES. MULCHING - 3.35: MULCHING WILL BE APPLIED TO ALL AREAS THAT RECEIVE TEMPORARY OR PERMANENT SEED. MULCH SHALL BE APPLIED IMMEDIATELY AFTER SEEDING. 4. SOIL STABILIZATION BLANKETS & MATTING - 3.36: APPROPRIATE BLANKETS/MATTING WILL BE APPLIED AFTER TEMPORARY AND PERMANENT SEEDING TO ANY AREAS THAT ARE PRONE TO EROSION WHERE ADDITIONAL STABILIZATION MAY BE WARRANTED (E.G., STEEP SIDE SLOPES, FLOW PATHS THROUGH THE BASIN) AND TO ALL SLOPES GREATER THAN 3:1 BEFORE MOVING TO PHASE 3. PHASE 3 PHASE 3 STRUCTURAL PRACTICES DURING PHASE 3, THE PHASE 1 TEMPORARY SEDIMENTTRAP AND DIVERSION DIKE WILL REMAIN IN PLACE TO EFFECTIVELY ISOLATE THE UPPER END OF THE BASIN. THE PUMP -AROUND SYSTEM INSTALLED DURING PHASE 2 WILL BE MODIFIED TO ALLOW COMPLETION OF GRADING OF SEDIMENT FOREBAYS. THE FOLLOWING ARE ALSO INCLUDED WITH PHASE 3. 1. DEWATERING STRUCTURE - 3.26: PHASE 3 WILL UTILIZE DIRT BAGS OR OTHER APPROVED DEWATERING STRUCTURE FOR COMPLETION OF FOREBAYS AND OUTLET MICROPOOL. 2. PUMP AROUND: WHILE NOT A PRACTICE COVERED IN THE VESCH, PUMP AROUNDS FROM INLETS #2 AND #3 AND THE OUTLET MIICROPOOL ARE CRITICAL E&S COMPONENTS FOR PHASE 3. SEETHE CONSTRUCTION SEQUENCE FOR MORE DETAIL. 3. SILT FENCE - 3.05: SILT FENCE WILL BE INSTALLED BELOW THE GRADING NEEDED TO MODIFY THE EXISTING RISER STRUCTURE. PHASE 3 VEGETATIVE PRACTICES 1. SU'RFACE ROUGHENING - 3.29: SURFACE ROUGHENING WILL BE APPLIED TO ALL SIDE SLOPE GRADED OR DISTRUBED AREAS THAT ARE TO BE STABILIZED WITH VEGETATION, ESPECIALLY THOSE STEEPER THAN 3:1. 2. TEMPORARY SEEDING - 3.31: TEMPORARY SEEDING WILL BE APPLIED TO ANY REMAINING PHASE 3 DISTRUBED AREAS THAT WERE NOT STABILIZED DURING PHASE 2. 3. PERMANENT SEEDING - 3.32: PERMANENT SEEDING WILL BE APPLIED TO DISTURBED AREAS ON THE BASIN SIDE SLOPE THAT ARE DUE TO GRADING FOR THE RISER MODIFICATIONS AS WELL AS OTHER DISTRUBED AREAS ON THE SIDE SLOPES DUE TO EQUIPMENTACCESS OR OTHER CONSTRUCTION ACTIVITIES. 4. MULCHING - 3.35: MULCHING WILL BE APPLIED TO ALL AREAS THAT RECEIVE TEMPORARY OR PERMANENT SEED. MULCH SHALL BE APPLIED IMMEDIATELY AFTER SEEDING. 5. SOIL STABILIZATION BLANKETS & MATTING - 3.36: APPROPRIATE BLANKETS/MATTING WILL BE APPLIED AFTER TEMPORARY AND PERMANENT SEEDING TO ANY AREAS THAT ARE PRONE TO EROSION WHERE ADDITIONAL STABILIZATION MAY BE WARRANTED (E.G. STEEP SIDE SLOPES, FLOW PATHS THROUGH THE BASIN) AND TO ALL SLOPES GREATER THAN 3:1. 129"02116-ml, 1) 34C-GLENELG LOAM, 2 TO 7 PERCENT SLOPES PHASE 4 INVOLVES` COMPLETING THE WETLAND PLANTING PLAN, AS INDICATED ON THE PLAN SHEETS AND IN THE CONSTRUCTION SEQUENCE. 2) 27C-ELIOAK LOAM, 7 TO 15 PERCENT SLOPES 3) 28C3-ELIOAK CLAY LOAM, 7 TO 15 PERCENT SLOPES, SEVERELY ERODE G. RIO HILL BASIN - EROSION & SEDIMENT CONTROL PLAN, SEQUENCE OF CONSTRUCTION E. CRITICAL AREAS OVERALL APPROACH TO PHASING OF CONSTRUCTION E SIDE SLOPES OF THE BASIN WHICH ARE STEEP AND THE TWO EXISTING O CHANNELS THAT B E CRITICAL AREAS INCLUDE THE G EROSION N BEEN CUTT THROUGH THE AR , , H GH THE BASIN BOTTOM FROM THE TWO MAIN INLETS. THERE ARE TWO THE PROPOSED LAND -DISTURBING ACTIVITY IS IN THE BOTTOM OF AN EXISTING DRY DETENTION POND WITH A 72-ACRE DRAINAGE AREA. THE PURPOSE IS TO RETROFIT THE POND TO PROVIDE ENHANCED WATER QUALITY TREATMENT AS WELL AS NECESSARY ERODED SCOUR HOLES AT INLETS #2 AND #3, AND THESE WILL BE EXPANDED INTO FUNCTIONAL FOREBAYS AS PART OF THE RETROFIT PROJECT. MAINTENANCE. AS SUCH, THE GRADING WILL TAKE PLACE ON THE FLOOR OF THE EXISTING POND. A PHASED EROSION AND SEDIMENT CONTROL PLAN IS PROPOSED IN ORDER TO REDUCE EXPOSURE OF SOIL TO RAINFALL AND STORM FLOWS AT ANY GIVEN EROSION AND SEDIMENT CONTROL MEASURES TIME. THE PHASING WILL ALSO ALLOW SOME AREAS OF THE POND TO FULFILL AN E&S PURPOSE WHILE OTHERS ARE BEING GRADED AND MODIFI ED. FOUR PHASES ARE, ROPOSED IN THE PLAN. NOTE ALSO THAT THE PROPOSED WORK WILL ACCOMPLISH NECESSARY MAINTENANCE AND ALSO IMPROVE ACCESS FOR FUTURE OPERATION AND MAINTENANCE. COMPARED TO A FULL DREDGE PROJECT, THIS ACCOMPLISHES THESE GOALS AND IMPROVES PHASE 1 WATER QUALITY TREATMENT WITH LESS DISTURBANCE. WITH REGARD TO LONG-TERM MAINTENANCE ACCESS, NOTE THAT PART OF THE CONSTRUCTION ENTRANCE AND THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN WILL REMAIN AS PERMANENT PHASE 1 STRUCTURAL PRACTICES ACCESS FEATURES (SEE SHEET 7, PHASE 1 PLAN). 1. TEMPORARY CONSTRUCTION ENTRANCE - 3.02: A TEMPORARY CONSTRUCTION ENTRANCE WILL BE CONSTRUCTED AT THE NORTHWEST CORNER OF THE BASIN EASEMENT AREA. ACCESS TO THE CE WILL BE VIA THE PRIVATE SHOPPING CENTER ROAD OFF OF WOODBROOK DRIVE. PHASE 1 2. CONSTRUCTION ROAD STABILIZATION - 3.03: THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN WILL BE STABILIZED WITH FILTER FABRIC AND STONE. NOTE THAT THIS ACCESS ROAD WILL REMAIN AS A PERMANENT FEATURE TO AID WITH LONG-TERM MAINTENANCE. 3. SAFETY FENCE - 3.01: SAFETY FENCE WILL BE INSTALLED ALONG THE TOP OF SLOPE PERIMETER OF THE BASIN. 4. SILT FENCE - 3.05: SILT FENCE WILL BE INSTALLED BELOW THE EXCAVATION NEEDED TO INSTALLTHE CONSTRUCTION ACCESS ROAD INTO THE BASIN. 5. TEMPORARY SEDIMENTTRAP - 3.13: ATEMPORARY SEDIMENTTRAP WILL BE INSTALLED TO ISOLATE THE UPPER END OF THE BASIN FLOOR AS PART OF PHASE 1 CONSTRUCTION (SEE GRADING AND DETAIL SHEET). THE TRAP WILL BE SIZED FOR THE PHASE 1 DISTURBED AREA. 6. TEMPORARY DIVERSION DIKE - 3.09: ALONG WITH THE TEMPORARY SEDIMENTTRAP, THE DIVERSION DIKE WILL ISOLATE GRADING IN THE UPPER PART OF THE BASIN. 7. CULVERT INLET PROTECTION - 3.08: CULVERT INLET PROTECTION WILL BE APPLIED AROUND THE BASIN'S OUTLET STRUCTURE (24" PIPE) TO PROTECT IT DURING PHASE 2 GRADING. IT WILL BE INSTALLED AS PART OF PHASE 1 AS A BACKUP SEDIMENT TRAPPING DEVICE DOWNSTREAM FROM THE PHASE 1 SEDIMENT TRAP AND DIVERSION DIKE. PHASE 1 VEGETATIVE PRACTICES 1. SURFACE ROUGHENING - 3.29: SURFACE ROUGHENING WILL BE APPLIED TO ALL SIDE SLOPE GRADED OR DISTRUBED AREAS THAT ARE TO BE STABILIZED WITH VEGETATION, ESPECIALLY THOSE STEEPER THAN 3:1. 2. TEMPORARY SEEDING - 3.31: TEMPORARY SEEDING WILL BE APPLIED TO ALL PHASE 1 DISTRUBED AREAS BEFORE MOVING ON TO PHASE 2. THIS SEEDING WILL BE TEMPORARY BECAUSE A WETLAND PLANTING PLAN WILL ALSO BE INCLUDED THAT INDICATES PERMANENT WETLAND SEEDING AND INSTALLTION OF PLUGS. 3. PERMANENT SEEDING - 3.32: PERMANENT SEEDING WILL BE APPLIED TO ALL SIDE SLOPES ABOVE THE BASIN FLOOR THAT WILL BE DISTRUBED DURING PHASE 1 AND THAT WILL NOT BE DISTURBED AGAIN DURING SUBSEQUENT PHASES. 4. MULCHING - 3.35: MULCHING WILL BE APPLIED TO ALL AREAS THAT RECEIVE TEMPORARY OR PERMANENT SEED. MULCH SHALL BE APPLIED IMMEDIATELY AFTER SEEDING. 5. SOIL STABILIZATION BLANKETS & MATTING - 3.36: APPROPRIATE BLANKETS/MATTING WILL BE APPLIED} AFTER TEMPORARY AND PERMANENT SEEDING TO ANY AREAS THAT ARE PRONE TO EROSION WHERE ADDITIONAL STABILIZATION MAYBE WARRANTED (E.G., STEEP SIDE SLOPES, FLOW PATHS THROUGH THE BASIN) AND TO ALL SLOPES GREATER THAN 3:1 BEFORE MOVING TO PHASE 2. BLANKETS & MATTING IS TO BE BIODEGRADABLE AND NOT TO CONTAIN ANY PLASTIC MESH. PHASE 1 ISOLATES THE TOP END OFTHE POND FLOOR. THE END HAS THE LEAST AMOUNT OF DRAINAGE AREA COMING TO IT AND THE GRADING/[BASIN MODIFICATIONS CAN BE DONE RELATIVELY QUICKLY. IT MAKES SENSE TO GET THIS WORK DONE BEFORE MOVING TO THE SUBSEQUENT PHASES. 1. HOLD A PRE -CONSTRUCTION MEETING WITH THE COUNTY VSMP AUTHORITY PERSONNEL, WATER RESOURCES STAFF, AND PROJECT DESIGNERS. 2. INSTALL SAFETY FENCE AROUND PERIMETER AS SHOWN ON THE PLAN. 3. INSTALL SILT FENCE BELOW THE AREA SHOWN FOR GRADING OF THE CONSTRUCTION ENTRANCE. 4. CONSTRUCT THE CONSTRUCTION ENTRANCE (INCLUDING STABILIZING WITH STONE) AT THE LOCATION INDICATED. NOTE THAT PART OF THE CONSTRUCTION ENTRANCE FROM THE INGRESS POINT TO THE ACCESS ROUTE, AND THE ACCESS ROUTE ITSELF, WILL REMAIN AS PERMANENT ACCESS FEATURES. THE CONSTRUCTION ENTRANCE SOUTH OF THE ACCESS ROUTE, ALONG WITH ASSOCIATED LAYDOWN AREAS, WILL BE TEMPORARY. REMOVE EXISTING GUARDRAIL ONLY IN SPOTS TO ALLOW INGRESS AND EGRESS FROM THE CONSTRUCTION ENTRANCE. 5. CONSTRUCT AND STABILIZE THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN, USING CONSTRUCTION ROAD STABLIZATION (FILTER FABRIC AND STONE). STABILIZE CUT AND FILL SLOPES ASSOCIATED WITH THE ACCESS ROUTE IMMEDIATELY (SURFACE ROUGHENING, SEEDING, MATTING). NOTE THAT WHILE THE ACCESS ROUTE WILL ALLOW ACCESS TO THE BOTTOM OF THE BASIN, MOVEMENT OF EQUIPMENT WITHIN THE BASIN BOTTOM FOR EACH PHASE SHOULD BE BY USE OF TIMBER MATS OR EQUIVALENT. 6. CLEAR VEGETATION IN THE PHASE 1 WORK AREA AT THE BOTTOM OF THE BASIN. ONLY GRUB AREAS THAT ARE NECESSARY TO GAIN ACCESS TO DIVERSION DIKE,'PRO*POSED SEDIMENT TRAP AND MAINTENANCE CAUSEWAY AREAS, AND SEDIMENT FOREBAY (S.F.) #4. OTHER AREAS SHOULD BE CLEARED, BUT NOT GRUBBED. 7. CONSTRUCT THE PHASE 1 DIVERSION DIKES AND SEDIMENTTRAP IN ORDER TO ISOLATE THE TOP END OF THE BASIN. WHEN BUILDING THE DIVERSION DIKES, CONSTRUCT MAINTENANCE CAUSEWAY (M.C.) #3 TO THE PROPOSED GRADE AND COVER WITH RIP -RAP. THIS M.C. WILL FUNCTION AS PART OF THE DIVERSION DIKE FOR PHASE 1. 8. CONSTRUCTTHE CULVERT INLET PROTECTION (SEDIMENTTRAP INLET PROTECTION) ATTHE EXISTING BASIN OUTLET STRUCTURE (24" PIPE FROM THE RISER). THIS AREA IS IN THE PHASE 2 CONSTRUCTION AREA, BUT THE CULVERT INLET PROTECTION WILL SERVE AS A BACKUP SEDIMENT TRAPPING DEVICE IF THE PHASE 1 SEDIMENT TRAP OVERFLOWS. 9. GRADE M.C. #4 AND FOREBAY #4. THERE IS NO BASEFLOW FROM THE TWO PIPES THAT LEAD TO S.F. #4, SO WORK SHOULD BE IN THE DRY UNLESS THERE IS A STORM EVENT. 10. IN THE CASE OF AN ANTICIPATED SIGNIFICANT STORM EVENT, STABILIZE DISTURBED AREAS TO THE EXTENT POSSIBLE AND PULL EQUIPMENT OUT OF THE BOTTOM OF THE BASIN. 11. ATTHE COMPLETION OF PHASE 1 INTERNAL GRADING, APPLY TEMPORARY SEED AND MULCH TO ALL BASIN FLOOR DISTURBED AREAS, AND PERMANENT SEED AND MULCH TO DISTURBED AREAS ON SIDE SLOPES DUE TO EQUIPMENT ACCESS. APPLY AN APPROVED EC-2 MATTING TO AREAS WHERE FLOW IS LIKELYTO CONCENTRATE. 12. PHASE 1 FEATURES TO BE COMPLETED: M.C. #3 AND #4, S.F. #4. INSPECTQR/DESIGNER CHECK -OFF FOR PROPER GRADING OF FEATURES. z w Hirsc2 Water & Environment, LLC 5tormwater & Stewardship S 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices. us �p,LTg of o vV>�AMx�.n�ti UAIUMAW 1& Na 049M $IpN L $LZ LL O L.L. W W W O O Z W r ) J O V) Q �- W W m J Q O ry PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 9/4/2019 SHEET:4 O u EROSION AND SEDIMENT CONTROL MEASURES CONTINUED U) co lzr N ry a U w w FY U J J w U rr U) O U w a� PHASE 2 PHASE 2 ALLOWS MOST OF THE GRADING TO TAKE PLACE AT THE LOWER END OF THE POND, WHILE PUMPING BASEFLOW FROM TWO INLETS AROUND THE WORK AREA. THIS IS SIMILAR TO E&S APPROACHES USED FOR STREAM RESTORATION WORK. 1. LEAVE THE PHASE 1 DIVERSION DIKES AND SEDIMENT TRAP IN PLACE. ENSURE THE CULVERT INLET PROTECTION IS OPERATIONAL AND IN GOOD WORKING ORDER, OR PROVIDE MAINTENANCE (E.G., SEDIMENT REMOVAL) AS NECESSARY 2. CLEAR VEGETATION IN THE PHASE 2 WORK AREA. GRUB AREAS IN ORDER TO CONDUCT GRADING AND GAIN ACCESS TO THE VARIOUS INLETS AND OUTLET. 3. AT THE IMMEDIATE PIPE OUTFALLS OF PIPES #2 AND #3, THERE ARE EXISTING SCOUR HOLES. PLACE RIP -RAP AROUND THE PERIMETER OF THESE SCOUR HOLES AND MODIFY THEM AS NEEDED IN ORDER TO PLACE A PUMP IN EACH ONE. THE PUMP AT PIPE #2 SHOULD RUN TO A PUMP -AROUND SYSTEM LEADING TO PIPE OUTFALL #3. THE PIPE #2 PUMP ONLY NEEDS TO BE SIZED FOR FLOW FROM PIPE 92. THE PUMP AT PIPE #3 SHOULD BE SIZED FOR FLOW FROM PIPES #2 AND 93, AND SHOULD GO TO A PUMP AROUND SYSTEM TO THE BASIN OUTLET AT THE CULVERT INLET PROTECTION (SEE PHASE 2 PLAN FOR PROPOSED ALIGNMENT TO KEEP THE PUMP AROUND OUT OF THE MAIN WORK AREA). 4. CONDUCT GRADING IN THE PHASE 2 WORK AREA. THIS INCLUDES M.C. #1 AND #2 AND S.F. #1. FOR S.F. #2 AND 93 AND THE OUTLET M ICROPOOL, CONSTRUCT ENOUGH OF THE FOREBAY WHILE LEAVING THE PUMP -AROUND SYSTEM AT #2 AND #3 AND OUTLET CIP IN PLACE. THIS WILL LIKELY MEAN NOT COMPLETING THE FINISHED GRADING RIGHT AT THE PIPE OUFALLS OR BASIN OUTLET. 5. THE PHASE 2 WORK AREA ALSO INCLUDES INTERNAL BASIN GRADING TO CREATE THE HIGH MARSH AND LOW MARSH ZONE AND BERM THAT RUNS GENERALLY FROM NORTH TO SOUTH. 6. IF A RAINFALL EVENT EXCEEDING 0.25" IS ANTICIPATED DURING PHASE 2 ACTIVITIES, STABILIZE DISTURBED AREAS AND PULL EQUIPMENT OUT OF THE BOTTOM OF THE BASIN. DEPENDING ON THE AMOUNT OF RAINFALL ACTUALLY RECEIVED, THE BASIN WILL DEWATER THROUGH THE CULVERT INLET PROTECTION AND EXISTING OUTLET. HOWEVER, RESUMING WORK IN THE PHASE 2 AREA MAY REQUIRE ADDITIONAL DEWATERING THROUGH AN APPROVED FILTERING DEVICE, SUCH AS A DIRT BAG. CHECK WITH THE COUNTY INSPECTOR AND DESIGNER BASED ON ACTUAL SITE CONDITIONS. REMOVE THE TEMPORARY PLATE/PLUG WHEN WORK IS READY TO RESUME. 7. AT THE COMPLETION OF PHASE 2 INTERNAL GRADING, APPLY TEMPORARY SEED AND MULCH TO ALL BASIN FLOOR DISTURBED AREAS, AND PERMANENT SEED AND MULCH TO DISTURBED AREAS ON SIDE SLOPES DUE TO EQUIPMENT ACCESS. APPLY AN APPROVED EC-2 MATTING TO AREAS WHERE FLOW IS LIKELY TO CONCENTRATE. MULCH SHALL BE APPLIED IMMEDIATELY AFTER SEEDING. 8. PHASE 2 FEATURES TO BE COMPLETED: M.C. #1 AND #2, S.F. #1 AND AS MUCH OF S.F. #2 AND #3 AND OUTLET MICROPOOL AS POSSIBLE, WHILE LEAVING THE PUMP -AROUND SYSTEMS IN PLACE. INSPECTOR/DESIGNER CHECK -OFF FOR PROPER GRADING OF FEATURES. STABILIZATION NOTES 1. GENERAL SEEDING SHALL OCCUR WITHIN SEVEN DAYS OF REACHING FINAL GRADE. 2. PLANTING AT OTHER TIMES THAN SPECIFIED MAY BE DONE ONLY UNDER SPECIFIC CONDITIONS AND WITH THE CONSENT OF THE ENGINEER. 3. ALL OPERATIONS SHALL BE PERFORMED ONLY WHEN THE SOIL IS IN PROPER CONDITION TO PERMIT SATISFACTORY WORK. 4. SURFACE SHALL BE CLEARED OF ALL GRADE STAKES, SURFACE TRASH OR OTHER OBJECTS, WHICH WOULD HINDER INSTALLATION OF SEED. 5. SEED SHALL BE APPLIED WITH AN APPROPRIATE METHOD EITHER BY HYDROSEEDING/HYDROMULCHING OR BROADCAST SPREAD. 6. HYDROSEED OR HYDRO MULCH SHALL BE DYED GREEN TO AID IN VISUAL METERING DURING APPLICATION AND SHALL BE APPLIED AT A RATE OF 1200 POUNDS PER ACRE. 7. UNLESS HYDROSEEDING/HYDROMULCHING METHODS ARE USED, SEED SHALL BE RAKED AND LIGHTLY ROLLED. SEED SHALL BE COVERED WITH STRAW MULCH AT A RATE OF 1.5 TONS PER ACRE AND SHALL BE OF STANDARD QUALITY AND FREE OF WEEDS. MAINTENANCE SCHEDULE IN GENERAL, THE CONTRACTOR SHALL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES EVERY FOUR DAYS AND WITHIN 48-HOURS OF THE END OF A STORM EVENT THAT IS 0.25 INCHES OR GREATER. IF SITE INSPECTIONS IDENTIFY BMPS THAT ARE NOT OPERATING EFFECTIVELY, MAINTENANCE SHALL BE PERFORMED BEFORE THE NEXT ANTICIPATED STORM EVENT. UNLESS OTHERWISE SPECIFIED, ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. A COPY OF THE APPROVED ESC PLAN SHALL BE MADE AVAILABLE ONSITE AT ALL TIMES. 1. TEMPORARY STONE CONSTRUCTION ENTRANCE SHALL BE MAINTAINED IN A CONDITION, WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO PUBLIC RIGHT-OF-WAYS. PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND REWORKING OF EXISTING STONE SHALL BE EXECUTED AS CONDITIONS DEMAND. ALL MATERIALS SPILLED, DROPPED, WASHED OR TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY, BUT NO LATER THAN THE END OF EACH WORKDAY. CONSTRUCTION VEHICLES ENTERING AND EXITING THE SITE ON A REGULAR BASIS TO HAUL IN AND OUT MATERIAL AND EQUIPMENT SHALL USE THE TEMPORARY CONSTRUCTION ENTRANCE, BUT SHALL NOT ENTER THE ACTIVE GRADING AREA ON THE BASIN FLOOR. EXCAVATION AND GRADING EQUIPMENT ON THE BASIN FLOOR WILL GENERALLY REMAIN ON SITE AND USE THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN, AND WILL BE WASHED PRIOR TO LEAVING THE SITE. THESE PROVISIONS ARE INTENDED TO KEEP THE TEMPORARY CONSTRUCTION ENTRANCE AS CLEAN AS POSSIBLE. NOTE ON SHEET 7 TO SECTIONS OF THE CONSTRUCTION ENTRANCE AND ACCESS ROUTE TO THE BASIN FLOOR THAT ARE TO REMAIN AS PERMANENT MAINTENANCE ACCESS FEATURES. 2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS 9. PHASE 2 FEATURES BE COMPLETED: PLANTING PLAN, REMOVAL OF TEMPORARY E&S DEVICES. INSPECTOR/DESIGNER CHECK -OFF FOR SHALL BE MADE IMMEDIATELY. SEDIMENT DEPOSITS SHALL BE REMOVED AFTER EACH STORM EVENT AND WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF ADHERENCE TO PLANTING PLAN. THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO PHASE 3 CONFORM TO THE EXISTING GRADE, REPAIRED, AND SEEDED. PHASE 3 ALLOWS THE REMAINING GRADING TO TAKE PLACE AT THE LOWER END OF THE BASIN, WHILE KEEP WORK AREAS DEWATERED. 1. PHASE 3 INVOLVES COMPLETING THE GRADING FOR S.F. #2 AND #3, THE OUTLET MICROPOOL, AND MODIFICATIONS TO THE EXISTING RISER. 2. RECONFIGURE THE PUMP AT S.F. #2 TO GAIN ACCESS TO THE AREA IMMEDIATELY ATTHE PIPE OUTFALL. RUN THE PUMP FROM S.F. #2 TO AN APPROVED SEDIMENT FILTERING DEVICE, SUCH AS A DIRT BAG. COMPLETE GRADING FOR S.F. #2. 3. REPEAT #2 ABOVE FOR S.F. #3. THIS MAY INVOLVE PUMPING S.F. #3 TO A SEPARATE DIRT BAG. 4. SET UP A PUMP SYSTEM AT THE OUTLET MICROPOOL AND RUN TO ONE OF THE EXISTING OR A SEPARATE DIRT BAG. TEMPORARILY REMOVE THE CIP SO THAT GRADING ON THE MICROPOOL CAN BE COMPLETED, AND THEN RE-ESTABLISH THE CIP, USING THE FINAL MICROPOOL CONFIGURATION FOR THE CIP. 5. INSTALL THE PLATE WITH 1.6' ORIFICE ON THE EXISTING OUTLET PIPE. 6. GRADE THE EMBANKMENT AROUND THE EXISTING RISER AND ENLARGE THE RISER NOTCHES AS SHOWN ON THE PLAN DETAIL. 7. AT THE COMPLETION OF PHASE 3 INTERNAL GRADING, APPLYTEMPORARY SEED AND MULCH TO ALL BASIN FLOOR DISTURBED AREAS, AND PERMANENT SEED AND MULCH TO DISTURBED AREAS ON SLOPES DUE T© EQUIPMENT ACCESS AND GRADING AROUND THE RISER. APPLY SURFACE ROUGHENING AND AN APPROVED EC-2 MATTING TO AREAS WHERE FLOW IS LIKELY TO CONCENTRATE AND SLOPES GREATER THAN 3:1. 8. STABILIZE AND REPAIR THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN AND THE CONSTRUCTION E NTRANCE NORTH OF THE ACCESS ROUTE. REPAIR ANY EROSION AREAS AND APPLY CLEAN STONE WHERE NECESSARY. THESE FEATURES WILL REMAIN IN PLACE AS PERMANENT MAINTENANCE ACCESS POINTS. 9. REMOVE AND STABILIZE STONE AND LAYDOWN AREAS ALONG THE TOP EDGE OF THE BASIN SOUTH OF THE ACCESS ROUTE. 10. PHASE 3 FEATURES TO BE COMPLETED: S.F. 42 AND #3 AND OUTLET MICROPOOL. INSPECTOR/DESIGNIER CHECK -OFF FOR PROPER GRADING OF FEATURES. PHASE 4 PHASE 4 INVOLVED IMPLEMENTING THE PLANTING PLAN AT THE APPROPRIATE TIME OF YEAR AS INDICATED IN THE PLAN. THIS MAY ALSO REQUIRE REMOVAL AND ERADICATION OF INVASIVE OR NON-NATIVE SPECIES THAT HAVE INHABITED THE BASIN FLOOR PRIOR TO PLANTING THE SPECIFIED VEGETATION. 1. STORE AND PLANT ALL VEGETATION ACCORDING THE PLANTING PLAN SPECIFICATIONS. 2. WHEN THE BASIN FLOOR AND SIDE SLOPES ARE STABILIZED WITH VEGETATION, REMOVE ANY TEMPORARY COMPONENTS OF THE OUTLET STRUCTURE CIP AND OTHER TEMPORARY EROSION AND SEDIMENT CONTROL DEVICES STILL IN PLACE. REMOVE THE DEWATERING SNOUT ON THE OUTLET PIPE AND INSTALL THE FINAL PLATE WITH THE 1.6' ORIFICE AS PER THE RISER DETAILS. 3. REPAIR OR REPLACE DAMAGED CURB & GUTTER UPON REMOVING CONSTRUCTION ENTRANCE AS NEEDED. 4. PHASE 4 FEATURES TO BE COMPLETED: PLANTING PLAN, REMOVAL OF TEMPORARY E&S DEVICES. INSPECTOR/DESIGNER CHECK -OFF FOR ADHERENCE TO PLANTING PLAN. 5. CONSULT THE VIRGINIA DCR INVASIVE SPECIES LIST: https://www.dcr.virginia.gov/natural-heritage/invsppdflist . IN ADDITION, INVASIVE WOODY SPOUTS SHOULD BE CUT AND SPRAYED PRIOR TO PLANTING NEW MATERIAL AS PER THE PLANTING PLAN. PERMANENT STABILIZATION AS STATED, TEMPORARY STABILIZATION WILL BE APPLIED TO ALL DISTURBED AREAS ON THE BASIN FLOOR. THESE AREAS WILL ULTIMATELY BE CONVERTED TO PERMANENT WETLAND VEGETATION BASED ON A WETLAND PLANTING PLAN. THE WETLAND PLANTINGS WILL BE A COMBINATION OF SEED MIX AND PLUGS. THE PERMANENT WETLAND PLANTING WILL BE ACCOMPLISHED DURING AN APPROPRIATE TIME OF YEAR, BUT PRIOR TO THE TEMPORARY VEGETATION GOING DORMANT. SEE THE PLANTING PLAN AND SCHEDULE ON THE DESIGN PLANS. IF THE PERMANENT WETLAND PLANTING CANNOT BE DONE PRIOR TO THE DORMANT SEASON, APPROPRIATE ADDITIONAL TEMPORARY STABILIZATION WILL BE APPLIED IN THE EARLY FALL UNTIL WETLAND PLANTING CAN TAKE PLACE IN THE SPRING. APPROPRIATE GOOSE PROTECTION FENCING AND NETTING WILL BE NEEDED IN SELECTED AREAS PLANTED WITH PLUGS AND/OR SEEDED WITH WETLAND SEED. THE CONTRACTOR SHOULD CONSULT THE COUNTY OF ALBEMARLE AS TO THE SPECIFIC AREAS, AND GOOSE PROTECTION SHALL BE INSTALLED IMMEDIATELY AFTER PLUG INSTALLATION OR SEEDING. 3. DISTURBED AREAS AND AREAS USED FOR STORAGE OF MATERIALS THAT ARE EXPOSED TO PRECIPITATION SHALL BE INSPECTED FOR EVIDENCE OF, OR THE POTENTIAL FOR, POLLUTANTS ENTERING THE DRAINAGE SYSTEM. 4. WHERE DISCHARGE LOCATIONS OR POINTS ARE ACCESSIBLE, THEY SHALL BE, INSPECTED TO ASCERTAIN WHETHER EROSION CONTROL MEASURES ARE EFFECTIVE IN PREVENTING SIGNIFICANT IMPACTS TO RECEIVING WATERS. WHERE DISCHARGE LOCATIONS ARE INACCESSIBLE, NEARBY DOWNSTREAM LOCATIONS SHALL BE INSPECTED TO THE EXTENT THAT SUCH INSPECTIONS ARE PRACTICAL. 5. LOCATIONS WHERE VEHICLES ENTER OR EXIT THE SITE SHALL BE INSPECTED DAILY FOR EVIDENCE OF OFFSITE SEDIMENT TRACKING. 6. INLET PROTECTION SHALL BE CHECKED REGULARLY FOR SEDIMENT BUILD-UP, WHICH WILL PREVENT DRAINAGE. IF THE GRAVEL IS CLOGGED WITH SEDIMENT, IT SHALL BE REMOVED AND CLEANED OR REPLACED. 7. TREE PROTECTION SHALL BE CHECKED REGULARLY FOR DAMAGE AND REPAIIRED AS NECESSARY. SITE INSPECTION FOR ADDITIONAL AREAS THAT WARRANT TREE PROTECTION SHOULD BE CONDUCTED DAILY. EROSION AND SEDIMENT CONTROL NOTES 1. THE OWNER/DEVELOPER MUST NOTIFY ALBEMARLE COUNTY AT LEAST 24 HOURS PRIOR TO THE START OF CONSTRUCTIONS IN ACCORDANCE WITH APPLICABLE COUNTY ORDINANCES AND POLICIES. 2. THE OWNER/DEVELOPER GRANTS THE RIGHT -OF -ENTRY ON THIS PROPERTY TO THE DESIGNATED ALBEMARLE COUNTY PERSONNEL FOR THE PURPOSE OF INSPECTING AND MONITORING FOR COMPLIANCE WITH TITLE 10.01, CHAPTER 5, ARTICLE 4 OF THE CODE OF VIRGINIA, EROSION AND SEDIMENT CONTROL LAW AND THE DESIGN AND CONSTRUCTION STANDARDS MANUAL SECTION 750.04 (C). 3. ALL EROSION CONTROL MEASURES SHOWN ON THE APPROVED PLAN MUST BE IN PLACE AND INSPECTED AND APPROVED BY THE DESIGNATED AUTHORITY PRIOR TO CLEARING, STRIPPING OF TOPSOIL OR GRADING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN AND PERM IT SHALL BE KEPT ON THE SITE AT ALL TIMES. 5. THE CONTRACTOR IS RESPONSIBLE FOR THE INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE DESIGNATED AUTHORITY. 6. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL COMPLETE AND ADEQUATE STABILIZATIONS IS ACHIEVED. 7. WATER MUST BE PUMPED INTO AN APPROVED FILTERING DEVICE DURING DEWATERING OPERATIONS. 8. ALL EROSION AND SEDIMENT CONTROL PRACTICES MUST BE CONSTRUCTED AND MAINTAINED ACCORDING TO THE MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, ICHAPTER 840, "EROSION AND SEDIMENT CONTROL REGULATIONS". THE DEVELOPER/DEVELOPER'S REPRESENTATIVE SHALL INSPECT ALL EROSION AND SEDIMENT CONTROLMEASURES AT A MINIMUM EVERY FOUR DAYS AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN 'PARTICULAR: 1) SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC. 2) SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALFWAY TO THE TOP OF THE BARRIER 3) SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURETHAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED 4) STREAM DIVERSIONS SHALL BE INSPECTED DAILY AND AFTER EACH RAIN TO ENSURE THEY'RE FUNCTIONING PROPERLY AND THAT THE INTEGRITY OF THE LINING ARE NOT IMPAIRED. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES MUST BE MADE IMMEDIATELY AFTER THE INSPECTION. 9. PERMANENT SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN UNDISTURBED FOR LONGER THAN FOURTEEN (14) DAYS. SEEDING AND SELECTION OF THE SEED MIXTURE SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK 3.32. ROADS AND PARKING AREAS SHALL BE STABILIZED WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED. 10. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES WILL BE REMOVED WITHIN 30 DAYS AFTER ADEQUATE SITE STABILIZATION AND AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, AS AUTHORIZED BY THE DESIGNATED VESCP INSPECTORS. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES WILL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 11, WHEN THE SEDIMENT IS TRANSPORTED ONTO A PAVED ROAD SURFACE, THE ROAD WILL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT WILL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING WILL BE ALLOWED ONLY AFTER SEDIMENT IS DISPOSED IN THIS MANNER. 12. AREAS WHICH ARE NOT TO BE DISTURBED WILL BE CLEARLY MARKED BY FLAGS, SIGNS, ETC. 13. TREE SAVE AREAS SHALL BE CLEARLY MARKED IN THE FIELD BY ORANGE SAFETY FENCE. 14. ORANGE SAFETY FENCE MUST BE INSTALLED AROUND ALL SILT TRAPS AND SEDIMENT BASINS. MINIMUM STANDARDS NARRATIVE 1. MS-1 : SOIL STABILIZATION WILL BE ACHEIVED PER STABILIZATION NOTES AND EROSION AND SEDIMENT CONTROL NARRATIVE. 2. MS-2: SILT FENCE SHALL BE INSTALLED ALONG PERIMETER OF ALL TEMPORARY STOCKPILES. 3. MS-3: PERMANENT STABILIZATION WILL BE COMPLETED PURSUANT OF NOTES PROVIDED. 4. MS-4: A SEDIMENT TRAP WILL BE CONSTRUCTED IN PHASE ONE OF THE ESC PLAN. 5. MS-5: IMMEDIATE STABILIZATION SHALL OCCUR ON ALL EARTHEN STRUCTURES AFTER INSTALLATION. 6. MS-6: THE SEDIMENT TRAP HAS BEEN SIZED AT 1800 CUBIC FEET TO CAPTURE 0.5 ACRES OF RUNOFF. 7. MS-7: CUT AND FILL SLOPES WILL BE STABILIZED ACCORDING TO NOTES PROVIDED IN ESC PLAN AND PLANTING PLAN. 8. MS-8: NOT APPLICABLE. 9. MS-9: EROSION CONTROL MATTING, DECK MATS, STRAW MULCH, AND SHREDDED HARDWOOD MULCH WILL BE USED IN STEEP SLOPE AREAS. 10. MS-10: CULVERT INLET PROTECTION WILL BE INSTALLED IN PHASE ONE AROUND THE STORM SEWER INLET. 11. MS-11: PERMANENT INLET PROTECTION IS BEING CONSTRUCTED AROUND THE STORM SEWER INLET AS PART OF THE PROJECT. 12. MS-12: NOT APPLICABLE 13. MS-13: NOT APPLICABLE 14. MS-14: NOT APPLICABLE 15. MS-15: NOT APPLICABLE 16. MS-1 6: NOT APPLICABLE. 17. MS-17: A STONE CONSTRUCTION ENTRANCE (WITH WASH RACK IF NECESSARY) WILL BE INSTALLED AS DEPICTED ON PLANS. 18. MS-18: REMOVAL OF TEMPORARY MEASURES WILL BE COMPLETED ACCORDING TO NOTES PROVIDED. 19. MS-19: THE PROPOSED PROJECT WILL ADD CAPACITY AND ENHANCE VEGETATION COMPARED TO THE EXISTING CONDITION. AS SUCH, THE PROJECT WILL DECREASE RUNOFF TO THE DOWNSTREAM CHANNEL IN WOODBROOK. STORMWATER RUNOFF CONSIDERATIONS THE PROPOSED PROJECT WILL ADD CAPACITY AND ENHANCE VEGETATION COMPARED TO THE EXISTING CONDITION. AS SUCH, THE PROJECT WILL DECREASE RUNOFF TO THE DOWNSTREAM CHANNEL IN WOODBROOK. THE WHOLE PURPOSE OFTHIS PROJECT ISTO IMPROVE RUNOFF CONDITIONS AND POLLUTANT REMOVAL COMPARED TO THE EXISTING BASIN. STORMWATER MANAGEMENT PLAN THIS PROJECT IS A STORMWATER RETROFIT PLAN, AND AS SUCH, CONSTITUTES THE STORMWATER MANAGEMENT PLAN. AT FUTURE DATE,THE FULL PLAN SET, INCLUDING A PLANTING PLAN WILL BE SUBMITTED TO THE COUNTY WATER RESOURCES BOARD. CALCULATIONS .y SIZE OF DISTURBED AREA - 0.5 ACRES REQUIRED CAIPACITY OF SEDIMENT TRAP = 0.5 ACRES X 134 CUBIC YARDS = 67 CUBIC YARDS BOTTOM WIDTH OF SEDIMENT TRAP = 15' BOTTOM LENGTH OF SEDIMENT TRAP = 30' DEPTH OF SEDIMENT TRAP = 4' CAPACITY OF IPROPOSED SEDIMENT TRAP 15' X 30' X 4' = 1800 FTSQ = 66.5 CUBIC YARDS VARIANCES TEMPORARY SEDIMENT TRAP - 3.13 & 3.14 & MS-6: REQUESTED VARIANCE TO SIZE AND CONSTRUCT THE SEDIMENT TRAP BASED ON THE PHASE 'I DISTURBED AREA 1N THE BASIN FLOOR AND AROUND THE INLETS. THE TWO INLET PIPES IN PHASE 1 DRAIN AN ADDITIONAL DRAINAGE AREA OF 9.5 ACRES. HOWEVER, CONSTRUCTING A TEMPORARY SEDIMENT BASIN IN THE BOTTOM OF AN EXISTING DETENTION POND (SIZED FOR THE TOTAL DRAINAGE AREA) WOULD BE IMPRACTICAL AND WOULD NOT FIT WITHIN THE CONFINED LIMITS OF THE BASIN FLOOR. IT WOULD ALSO PROLONG THE PERIOD OF DISTURBANCE, WHEN THE BEST APPROACH FOR PHASE 1 WOULD BE TO DO THE WORK QUICKLY AND GET DISTURBED AREAS STABILIZED BEFORE MOVING ON TO PHASE 2. THE LONGER THE CONSTRUCTION TAKE PLACE IN THE BASIN BOTTOM, THE MORE RISK THERE IS OF A LARGER STORM EVENT. THE PROPOSED COMBINATION OF SEDIMENT TRAP, DIVERSION DIKE, AND CULVERT INLET PROTECTION WILL BE PROVIDE AMPLE PROTECTION FOR THE SHORT DURATION OF PHASE 1. THE DRAINAGE AREA TO THE ENTIRE BM IS APPROXIMATELY 72 ACRES. RETROFITTING THE BASIN OUTLET IS SIMILARLY INADVISABLE/INFEASIBLE. THE STORAGE NEEDED TO MEET SEDIMENT BASIN DESIGN STANDARDS WOULD BE 259,200 CUBIC FEET, WHICH WOULD EQUATE TO AN ELEVATION OF 480.50. THIS ELEVATION WOULD DISCHARGE THROUGH THE EXISTING RISER STRUCTURE. THE WET VOLUME OF 129,600 CUBIC FEET WOULD EQUATE TO AN ELEVATION OF 476.10, APPROXIMATELY 9.5 FEET ABOVE THE CONCRETE OUTLET. TWO OF THE OUTLETS THAT DRAIN TO THE BMP HAVE BASEFLOW; TO IMPLEMENT A SEDIMENT BASIN PRACTICE WOULD REQUIRE CLOSING OFF THE ELLIPTICAL CONCRETE OUTLET AND WOULD CONTRIBUTE TO PONDED WATER IN THE WORK AREA. FOR THESE REASONS AND MORE, A VARIANCE IS BEING REQUESTED TO MANAGE SEDIMENT LADEN RUNOFF THROUGH THE PROPOSED ESC PRACTICES AND PHASING IN PLACE OF A SEDIMENT BASIN. DEWATERING STRUCTURE - 3.26: THE VESCH DOES NOT INCLUDE DIRT BAGS AS ONE OF THE OPTIONS FOR DEWATERING STRUCTURES. HOWEVER, DIRT BAGS ARE USED ROUTINELY FOR THE APPLICATIONS ENVISIONED, AND ARE MORE VERSATILE THAN THE VESCH OPTIONS. WE REQUEST USE OF DIRT BAGS AS AN OPTION FOR THE DEWATERING APPLICATIONS THAT WILL TAKE PLACE DURING PHASES 2 AND 3. PAVED WASH RACK, ALBEMARLE COUNTY DSM, PGS. 7-8: REQUESTED VARIANCE FROM THE PAVED WASH RACK REQUIREMENT DUE TO THE RELATIVELY SHORT DURATION OF CONSTRUCTION AND LACK OF WATER SOURCE. TO SUPPORT THIS VARIANCE, THE MAINTENANCE SCHEDULE STIPULATES THAT CONSTRUCTION VEHICLES ENTERING AND EXITING THE SITE ON A REGULAR BASIS TO HAUL IN AND OUT MATERIAL AND EQUIPMENT SHALL USE THE TEMPORARY CONSTRUCTION ENTRANCE, BUT SHALL NOT ENTER THE ACTIVE GRADING AREA ON THE BASIN FLOOR. EXCAVATION AND GRADING EQUIPMENT ON THE BASIN FLOOR WILL GENERALLY REMAIN ON SITE AND USE THE ACCESS ROUTE TO THE BOTTOM OF THE BASIN, AND WILL BE WASHED PRIOR TO LEAVING THE SITE. THESE PROVISIONS TO SEGREGATE EQUIPMENT IN THE ACTIVE CONSTRUCTION AREA VERSUS OTHER CONSTRUCTION -RELATED VEHICLES ARE INTENDED TO KEEP THE TEMPORARY CONSTRUCTION ENTRANCE AS CLEAN AS POSSIBLE, RELIEVING THE NECESSITY OF A PAVED WASH RACK. Hirschman Water & Environment, LLC Stormwater & Stewardship i"ii 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices.us OF .ALT$ O O WmLL AM KRgmG U MUMAW Lic, No. 049293 11 LWAL 15 U. O 0. i I..L. Q Lu I- z O 0 U z w J ry U O m r� v) -I J < O IZ z O U) w PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 9/4/2019 SHEET: .o �-" -J "' ,- --"- -- -- 11 / -/ ) / / rl, / /�{ ` -r. - / / .� / / � . , / ///r /% / ,,,/ / / / /' I ( - ' 1. 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PROPOSED GROUND " "' " "'ZETE PIPE DETAIL OF MODIFICATION TO OUTLET NTS STEEL PLATE TO BE ADDED 2 TE BLOCK PLANTING SCHEDULE ZONE 2: 67630 S.F. `\\ \\\\\\\\\\� LOW MARSH (APPROXIMATE ELEVATIONS 468-470) PERMANENT POOL, WETLAND. PLANTING PLUGS/BARE ROOT ONLY- PLANTING IN MAY THROUGH SEPTEMBER. PLANTS SHOULD CONSIST OF 40% GRASSES AND 60% WILDFLOWERS; MUST USE A MINIMUM OF 5 WILDFLOWER SPECIES. NO SUBSTITUTIONS ALLOWED ONTO THIS LIST BUT OMISSIONS ARE ANTICIPATED. THE FINAL PLANTING LIST SHOULD BE APPROVED BY ALBEMARLE COUNTY INCLUDING SOURCES SPECIES QUANTITIES, AND DATES OF PLANTING. ALL PLANTS MUST BE VIRGINIA PIEDMONT NATIVES. PLANTING DENSITY SHOULD BE 6 INCH ON -CENTER. THE TOTAL NUMBER OF PLUGS SHALL BE 26,520. ZONE 2 SHALL BE FLAGGED OUT IN THE FIELD POST CONSTRUCTION AND PRIOR TO PLANTING. SOIL DECOMPACTION MAY BE NECESSARY BEFORE PLANTING. THE CONTRACTOR IS RESPONSIBLE FOR FURNISHING, TRANSPORTING, STORING, AND INSTALLING ALL HERBACEOUS PLUGS TO MAXIMIZE PLANTING SUCCESS. THESE PLANTS SHALL BE UNDER A 1-YEAR CARE AND REPLACEMENT WARRANTY BY THE CONTRACTOR IN ORDER TO ATTAIN 90% SURVIVAL. GOOSE PROTECTION IS REQUIRED POST -PLANTING AROUND THE ENTIRE AREA OF PLUGS. FOR THIS SITE THE SUGGESTED PROTECTION IS BRIGHTLY -COLORED STRING OR RIBBON INSTALLED IN A CRISS-CROSS PATTERN OVER THE SURFACE AREA OF PLUGS. GOOSE PROTECTION SHALL BE REMOVED WHEN PLANTS BECOME ESTABLISHED AND NO LONGER SUSCEPTIBLE TO GOOSE PREDATION. THE TIMING OF REMOVAL .gwAI I RF APPRn\ip:n RY THE r`ni 1NTY nF Al RFNAARI F Vegatation Latin name Common name Type Carex comosa Bottlebrush sedge Grass Plug Carex stricta Tussock sedge Grass Plug Iris versicolor Blue flag iris Wildflower Plug luncus effusus Soft rush Grass Plug Nupharadvena Spatterdowck (Yellow pond lily) Wildflower Plug Orontium aquaticum Golden club Wildflower Plug Peltandra virginiaca Arrow arum Wildflower Plug Pontederia cordate Pickerelweed Wildflower Plug Sagittaria latifolia Arrowhead (Swamp potato) Wildflower Plug Saururus cernus Lizards tail Wildflower Plug Schoenoplectus (was Scirpus) pungens Common three square Grass Plug Schoenoplectus tabernaemontani (was Scirpus validus) Soft stem bulrush Grass Plug Scirpus cyperinus Woolgrass Grass Plug ZONE 3: 6,952 S.F.NK��=. HIGH MARSH (APPROXIMATE ELEVATIONS 470-473) WETLAND FRINGE. SEED AT 20LBS/ACRE, 40% GRASS AND 60% WILDFLOWER BY WEIGHT. PLANT USING A SEED DRILL OR BY BROADCAST FOLLOWED BY A CULTI-PACKER. INSTALL SEED PER SEASON ERNST CONSERVATION SEED RECOMMENDATIONS OR INSTALL ANNUAL SEED EACH SEASON UNTIL CORRECT PLANTING TIME IS AVAILABLE. SEEDING SHOULD OCCUR IMMEDIATELY AFTER GRADING OF THE AREA. AFTER SEED IS INSTALLED, STRAW MULCH SHALL BE APPLIED. NO SUBSTITUTIONS ONTO THIS LIST UNLESS SPECIES ARE UNAVAILABLE BUT OMISSIONS ARE ANTICIPATED. THE PERCENTS PROVIDED ARE SUGGESTED PERCENTS ONLY AND ARE OPEN TO CHANGE. ALBEMARLE COUNTY SHALL REVIEW AND APPROVE ALL SUBSTITUTIONS. VIRGINIA PIEDMONT NATIVE PLANTS ONLY. NO WATERING OR FERTILIZATION IS ANTICIPATED, BUT IF NEEDED FERTILIZERS SHOULD BE ORGANIC. ALL PERMANENT SEEDED AREAS ARE UNDER A 2-YEAR WARRANTY WITH THE CONTRACTOR TO ATTAIN 85% SURFACE COVER. RESEEDING IN JUNE OR SEPTEMBER SHALL BE REQUIRED TO ATTAIN 85% COVERAGE WITHIN THE 2 YEAR WARRANTY. RESEEDING SHALL USE A SEED DRILL OR BROADCAST SEEDER FOLLOWED BY A CULTIPACKER AT A RATE OF 10LBS/ACRE. Botanical Name Common Name Plant type Perennial/ annual Percent seed per mix (lowland) Bidenscernua nodding burmarigold wildflower annual 0.01 Onocleasensibilis sensitive, bead fern Fern Perennial 0.01 Carex squarrosa, VA Ecotype Squarrose Sedge Grass Perennial 0.01 Carex vulpinoidea Fox Sedge Grass Perennial 0.182 Carex intumescens Greater bladder sedge Grass Perennial 0.01 Carex lurdida Lurid (Shallow) sedge Grass Perennial 0.05 Panicum rigidulum (Caleataenia rigidulum) Redtop Panicgrass Grass Perennial 0.15 luncus effuses Soft Rush Grass Perennial 0.03 luncus tenuis, NC Ecotype Path Rush, NC Ecotype Grass Perennial 0.01 Panicum anceps (Caleataenia anceps) VA Ecotype Beaked Panic Grass VA Ecotype Grass Perennial 0.3 Elymus virginus Wild Rye Grass Perennial 0.14 Asclepias IncarHate, PA & MidwesternU.S.SEcotype Swamp Milkweed, PA&MidwesternU.S.S,Ecotype wildflower Perennial 0.030 Asterprenanthoides Zigzag Aster wildflower Perennial 0.020 Eupotorium coelestinum Mistflower wildflower Perennial 0.020 Eupotorium perfoliatum Boneset 1,�?, wildflower Perennial 0.010 Helenium lexuosum f Pur lehead Snee z einreed p wildflower P Perennial 0.01 0 LobeliarphIli ica Great Labetis F' wildflower Perennial 2 0.002 Mimuius rin en s monkeyfl wer wildflower Perennial 0.0 0 1 o sedo'des Perth rum r hitch ston ecro p wildflower Perennia I 0 5 Oa zoNE4782 i ry 5 .F. d f SIDE SLOP E (APPROXIMATE ATEEL VATIONS 473 + )_ s 0 0 0 /o WILDFLOWER 8Y WEIGHT. ASS AND 6 W F H .PLAN S 0% GRASS T USING A SEED DRY UPLAND. SEED AT 20LBS/ACRE 4 EE DRILL OR BY BROADCAS T FOLLOWED BY A O ED CUL I- KE INS LL ED PER SE SON ERNIST CONSERVATI N SE RECOMMEN S T PAC R. TA SE A D OR INSTALL ANNU S AL EED EACH SEASON UNTIL CO EC RR T PLANTING TIME IS AVAILABLE. SEEDING SHOULD OCCUR IMMEDIATELY AFTER GRADING NG OF THE AREA. AFTER SEED IS INSTALLED, STRAW MULCH SHALL BE APPLIED. NOSUBSTITUTIO S ONTO THIS LIS ' UNL SS SPECIES ARE UNAVAILABLE ABLE BUT OMISSIONS M SIONS ARE ANTICIPATED. THE PERCENTS PROVIDED ARE SUGGESTED PERCENTS ONLY AND ARE OPEN TO CHANGE. ALEEMARLE COUNTY SHAL L REVIEW AND AP RO P VE ALL SUBSTITU 10 T NS. VIRGINIA PIEDMONT NATIVE PLANTS ONLY. NO WATERING OR FERTILIZATION IS ANTICIPATED BUT IF NEEDED Y NE ED FERTILIZERS SHOULD H LD BE ORGANIC. ALL AN A PERMANENT SEEDED i O S - AREA ARE UNDER A 2 YEAR WARRANTY WITH THE CONTRACTOR TO ATTAIN 85% SURFACE O A E COVER. RESEEDING IN IN DUNE OR SEPTEMBERSHALL AL BE o: REQUIRED TO ATTAIN 85 /o COVERAGE WITHIN THE 2 YEAR WARRANTY. RESEEDING SH ALL HALL USE A SEED DRILL OR BROADCASTE SEEDER FOLLOWED BY A CULTIPACKER AT A RATE OF 10 LBS/ACRE. Botanical Name Common Name I , Plant type Perennial/ annual Percent seed per mix (Slope Steeper Than 3:1) Percent seed per mix (Slope Less Than 3:1) Chamaecrista fasciculata Partridge Pea wildflower annual 0.020 0.025 Rudbeckia hirta Black-eyed Susan wildflower annual 0.017 0.024 Agrostis perennansAPB-NYEcotype Autumn Bentgrass, PA & APB -NY Ecotype Grass Perennial 0.040 0.025 luncus effuses Soft Rush Grass Perennial 1 0.005 0.050 luncus tenuis, NC Ecotype Path Rush, NC Ecotype Grass Perennial 0.030 0.040 Panicum anceps (Coleataenia anceps) VA Ecotype Beaked Panic Grass VA Ecotype Grass Perennial 0.305 0.250 Elymus virginus Wild Rye Grass Perennial 0.255 0.170 Schizachyriumscoparium, Piedmont NC Ecotype Little Bluestem Grass Perennial 0.250 0.250 Asclepiasincarnata, PA & Midwestern U.S. Ecotype Swamp Milkweed, PA & Midwestern U.S. Ecotype wildflower Perennial 0.005 0.010 Asclepids tuberosa, Butterfly Milkweed, Midwestern U.S. Ecotype wildflower Perennial 0.010 0.020 Asterprenanthoides Zigzag Aster wildflower Perennial 0.005 0.015 Aster cordifolius Blue Wood i wildflower Perennial 0.005 0.015 Eupatorium coelestinum Mistflower wildflower Perennial 0.010 0.020 Heleniumflexuosum PurpleheadSneezeweed wildflower Perennial 0.010 0.020 Liatris spicata, PA Ecotype Marsh (Dense) Blazing Star, PA Ecotype wildflower Perennial 0.010 0.020 Monarda punctato Spotted Beebalm wildflower Perennial 0.005 0.010 Penstemon loevigatus, PA Ecotype Appalachian Beardtongue, PA Ecotype wildflower Perennial 0.005 0.010 pycnanthemum tenufolium Narrowleaf Mountainmint, PA Ecotype wildflower Perennial 0.002 0.004 Rudbeckia fulgida VA Ecotype Orange Conef lower I wildflower Perennial 0.005 0.010 Solidago juncea Early Goldenrod wildflower Perennial 1 0.003 0.006 Solidago nemoralis Gray Goldenrod wildflower iPerennial 1 0,003 0.006 Hirschman Water Environment, LLC Starmwater & Stewardship 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices.us TR�A WR T iAM SIP'LIlVG � MUMAW ltic. 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I I-- _ , ... � _ �, �".- 0 - ,,, - __ , , ,( / ( "I", �1� . I - `11 ��', .", I , - - �." _- -_..", 1, " , "" , , , , - " - - t " " , "I " , , ttt..,...,.,t.,,..t� 14� ` -,,�-, t.- - �-_.- _.__ - ,,, . , "111 .11 .� , / 11" - - (6 ".., ,__� w__`... I I I __ � ? — " - - - - - - - t..�, L. �� - / , "',7"" 11 - , 7 "", /11�- , " (I 1,'�� �/ I " 0 "' 11 __%_ -.1 _ ------z_ I "Ill I,, - '11.1-,"', ,:, GENERAL NOTES - -1-1 _ I_- "". ,_-, � , - � -1 1- '..__ 4Si:r\__,., , ,,, - I" > -11, , .� " , >,, , -, r.. `,,_ ".".I... - ____ — " _.. I I -,--- L - ... - , , I I I � .,� � - -,--_ _ I 11 - ,1 -, - -1-1. ..".. , . _ 11.11 ", - � .".. 1�111_ 11-1. __ � 1, fl, / 1. ALL APPLICABLE LOCAL, STATE, AND FEDERAL PERMITS SHALL BE _'. "I - I'll., I I 11 __ AQCESS Rb� �D----�- � ,409 TO $ vq��-'-_' , � ___ '�---."...�-.-,�-,�,,�",��,-",-�.�'�-."- - __, i_ " _, --I"- �4 ... �', OBTAINED PRIOR TO ANY LAND DISTURBING ACTIVITIES. - , "' _4 ... ... . � 111.�___ I 1111 __ , -, "" f 1) I , 1\ J %11- I I.., :.� .1 -1111.1,11 I 11. ".. _.._ "..'..."'., — _ CE _ I � - LA , �_�-__ " j I I - �, I "' _ , - I .,,�, r / / I - `. f1i Lu ') �, I I 11411., � : I �_ -1, -1- ".., _ � :Z�__ - ---- SUOPE , - - .,,,,. - X, � ', , ,�, U) I � 111-11 , - .�� ... -, , ,.-I - '.." � 1. __ � � __ � u / , - I I 'It � .., 11, 11 .. --- - - `11.1.. ___ _ -, - 1, " / I 11- t, - - �t. . . 1- '11, '�_____ - � . ,-,. :` ____'. .... � 1.1--l"1111.11-, -."..,." - "' I --__:,, -__ I � 11, - , r,-- . - -le" .. ---1-1_,__ "t"".." ... -, /` / "I _,�_ - E-USED FO Ell�'D21 _� -r---------,% - � I I,--- ___ ___. __�','�, _/ 2. ALL PERMITS SHALL BE KEPT ONSITE. THE SWPP`P SHALL BE HELD ON w I _ _ __ .. "'t- EYx,C, _ _L f _1 - I— ) � ) .11, - _ - TO B R- ,,., �� ____ -1. ".." -,-" _ - - , ; , � �17, 0. U) 1 �9__�__._ �� ,; �� ,", � � _ _49 � ." I—, . _ _ - ......_. 11-, ''.1- -_ - � ----7-_., �-- i" , "of ,_11- . `. __ ____ --l...."111 """-"I-t-"�.."�..�.�''..",,., - _ ,_ I- ...... I "/ � ,.1 ,,i' ,,//,,' LABLE UPON REQUEST TO ANY REGULATORY >_ ___ - --, .PERMANEN�T ..... .. - 1'. ..\,, .. ," __ _'. 1 \ _� I." - -, � 111, ___ 1'.� _,.,_.,_ "...-I.- __ 1.11- . ...... 1-1.1, __, . _ '__ __ , � _ � I ""' "" . ...... ......... _111___ .. . .... � _ ,--- I " 11 I . . .... 11// / . U) I I I ', - `�. ,_, '!, .... -1 - , ... 1.11". ..", ... � ., .. , ,us-. , ,", "I 0 RUCTION ENTR 177�_ ___� _1141iii __ -, __ - __ "_, ,". � ..... - - _ .... .. .. _ _ I 0 i7 CO . ACE + + -,- I- - _ ... �. _11 , ,,,, I . I,- .,:� - - .1. // ' . 11- ..1.11 11-- -- --- 1__' , I 0 � _" r', - �� �,,, js I— _. ., 11 - I ... � I � � - ".1.1. _ -I.. ,, .. ... � - , �J " ,-',,,.,, ,� I / __ I\ ___ ,_ �1111 ,, .1 ,111 Lu a "" + I" ___ ,-,.-, - _1_______�1 1.1-1 � __ , �� ,� ,,,,, SHALL BE LOGGED AND A RECORD KEPT ONSITE. ,,DIME 3I0NS�,.,12'X70'/ It I � + + + + + , �_ .,.,- T� M Po'"ky" 4CCESS, _ 1". I—- - __ _ ___ "I", 1 "'I--'.. : -1 I—. """ 1.11,11 .. I— I—, 1 .." _,.� t, e-111 .,/, " I __ 'TION. 1 11 _ "", ... __ I U ( 3. DECK MATS SHALL BE PLACED IN AREAS DEPICTED ON PLANS AND <1 I.' - ��_� _`_6 - � - !. ,", 11._ , J ",\ '',1._ � .... . . 1, ,__�, I . i., . _V1§11 I - _ "� R A �,F_Q'�'CO'NSTRU ....- .1 ... __1____1 , , " _', .", _ � __ _.- . 11 '11-1-Il- I ___111.1 ", __ 1. \ �/ //" � '. "I ,--;z;- - + t, )+ + -'4-+ + +- d§'. 11 I_- -.--,-- - � _ ..". -, 1.11- ". - ___� _ , �__. 1.1-11. 11-1 I—— - ,...1 "__ ". - I . �. , 00 I ' I I— - ....... ___ ,7 . / WHERE NECESSARY TO MINIMIZE GROUND AND CRITICAL TREE ROOT - ,'I- 1, """ .1-, -, -11, - __ 1.11.1.. I . 1 .. .... 11-.1-111 _-, __ ." ....", " i ( / ) I N t,,"" - , _�_�___=_�_,___ I � . . + _+ __ I... "' 11 �1111 ----L�;�.. � ... .. - - .-.-. 11 ... ...... / ZONE AREAS. \\ --__ - / �1. __ ___�__, I—., 4.1111" � 17 ____ \ � .. ----__ _\ .- -, " " , t,", ` 11- - � 11 _11.1-11 11______�, __ .11 I _11 t I I - 1. � � - . " I-, / I � �1, ___ "'. -1-1, __ 1. 1� ,,, - ... � . . ---�,jS-__-==, __ - , \ 4. ACTIVE WORK AREAS SHALL BE TEMPORARILY STABILIZED AT THE END OF 0) :, .. - - 1- _'� I m __17 1 1 .. 4S 1L_,,. .".11 . , /� , 1�__ � k I - ,_ , ----__ _-, __ ""' 1 _ _ , "' � - _ __ - ,"', ___ "..., �:�__, / \ - / ' t . ; t- --t+ ""_ ,._, ,�_ -.1.1, _ ,� , , - - ) , (I \,� / \ REMOVE GUARDRAIL I - %. R� 1 -j's, I � ...- � __ 11- . ....... / __ - ` �, EACH WORK DAY. , +.- -orl "j, ,,, - - 11. - -11. _.. 111, / �, / R "AS, / I T. _H ____ _, 111111.,� - - . / - I __ 1 - I ... - - .- _.. ___ . - . ..... � '. Y .1 - I � _11.11-r- V -\ /I �111�� _NECESSARY ) '� " , . fA . . T +___I.�� '11-11, ___� - _ 1, __/_ ___ - -1 ; - 5. CONTRACTOR SHALL INSTALL RAIN GAGE ONSITE. L0I" f ') / t / "I + .." ... �,_, '. I ),- ____ --,,- ", ... -11, "�', k _ -_ - "" _ 11 1- I-_ 4,11 _1 , k �.,__ I � I � +11" - I �- t i �� 1___.,�� _ ... I 11. 1.1 11-11 . ' <1 \ / �111� - / 1� - +11 � �,_+ I + j 1, .7� ............................ , I GJ ...... 1 --t., - "" /7 _"' ' '_ Q __ I ., ,__ _, �, 6. CONTRACTOR IS RESONSIBLE FOR ANY ADDITIONAL TEMPORARY � t /.1 ,'�� 'I .J,3 � - __ -11 - - 11 IJ - _ / I \ / + + + I ....... �:::� - - - .1 .1 LAYDOWN.,/ - --- --- � 10- / ,,, cr) 7 ""�� �_ " / , 1. 1\ \ /` EROSION & SEDIMENT CONTROL MEASURES THAT MAY BE REQUIRED BY �7!\ , C) . 1_-_� I", \,, I If -1 + + + ,+ + !- . I— t�]� 1 -14 0) `1�11,,\ ��,-,,,,,,_� " (/ ( - __-�-__ k '�_,_ ____11 �_� - - -fREA / /I N '�,., , ,� ------- '_ � \ - 1, -.,\ + + +'.11 1+i, + + 11 - - ,,, / k" ... ... COUNTY INSPECTOR. , -,,,-.t . . . . . ... 7_� _--e- N - �4_��:> i I , / 2,1� . zis _Z�, I- - A. < (��5 ," -`,�-�-, I \ / I I " _ I_ - _..., / J--\L�_, I 1:-z"., " "t. , 1� I—- � I., , . + ,�` + + 't \ "111� ._ ,_, '__�', )�__,, - , - ?i - I , "\ ��11,'_ / /+ I ....... I— / � I _'11 --I- i,, , __ � + ...'+1 I'll"+ " 'tm� +1, + +'.. *. z� 11_ - `:__ " I � \ / ) �___��,_ I / , + / _j N\1 � ", __111� . /J .. -t- ,/-t- � _j 1� / -----__.,__4 I—- , 11 , , - I,-,- ,I"." I I � / 11 . ", J �, �__ i- ��� - - -�,,, / , "' _'!�� -, '_ "'. --_:_- I _,-V-.Z�, - > I", k ��,__ I.., ..... �� - " ,,, 11 , -, ..... _ 11 _� U) . 11 I --�,, �t I( . _�_, ... ..... .� I ,., I- , , , � w I N% - I __ , - 11 _. _ � I I -_ I �__ \, ul-� 1% I / I"_ - " _ , 1. '-I, -- / � �_ I / A t'll- ,,, / i -,-- CONSTRUCTION VEHICLES ENTERING AND EXITING THE SITE ON A REGULAtR BASIS -11, _____ / Ir ,'// f I � I / TO HAUL MATERIAL AND EQUIPMENT IN AND OUT SHALL USE THE TEMPORARY - - _ � 0 ,,;, , (5 - "� _j !� N" I t -\, ,/ I � � " 'e", �,__ 1___� ",___ __ -----,, ", � 0� "I �_ _ . . ..... / � --. � / 1. / < \ / ) � I CONSTRUCTION ENTRANCE, BUT SHALL NOT ENTER THE ACTIVE GRADING AREA - ,,1-1�1,,,�',� Z:��_____ "�, _____ I ,I IE N1\ '1--l"', / - < C) ) /\ ,,� I SOIL 1 i. �,� ON THE BASIN FLOOR. EXCAVATION AND GRADING EQUIPMENT ON THE BASIN �_____,`�'__ I ____�__, ____111', ,--';,, "�, I. ` ltl�� __ I 11 . - . "",-t C_` _ FLOOR WILL GENERALLY REMAIN ON SITE AND USE THE ACCESS ROUTE TO �__`-___ , ___,�, , Lu �__ / � � SERIES � THE __ \ -,, , - _, � I 1, il., . il / �, / ill 11 ... ..... _��___ _____1__._ - "�, IJ � - uj ____-7PL .— — ____� '111`1 i 28C3 BOTTOM OF THE BASIN, AND WILL BE WASHED PRIOR TO LEAVING THE SOTE. . � , - ,,�4___ -___ - 4 1 1 � � - __ Z 4 � - � - � _- z t ��, ,--\ """"--�ll-l'.�-�",-..,.:"-��..,/ I f �� t � 1, / % I - ---I.- - . .',"1_,-__:�",, i "i I t THESE PROVISI 0 NS ARE I NTE N D E D TO KEE P TH E TE M PORARY CO NSTRU CTI ON ',"V " � __ EMOVE GUARDRAIL ____ __ �, - �It� , /`�, co 0 , ..... ... ... :�� _,___�' "k1-1, 11� � _4 �_ \ 11-I't, / � I I \_ 11-,�, tx ,\ � ,�_ -, - __,�_��z� Z_ I �,) , - 0 \ t � ) / "4 ; ENTRANCE AS CLEAN AS POSSIBLE. _�Z��7,11111_1 .... 11 / \' ... 11.1. ,�, /�S NECESSARY I -11 � , _ 41k__111 _j I I . � I '1� 11 I / \ � \/ .... .. , ...... �'_ � �\,__`11111 I IN I 1% . 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JNB PROJECT-#-. 17-0042 -_ DATE: 9/4/2019 SHEET: - A 00 v r R I- w w Ctf w J J J J w U .07 PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE SOURCE: CONWED PLASTICS VOOT ROAD AND BRIDGE STANDARDS PERSPECTIVE VIEW METAL FENCE PLATE. 3.01 ORANCE SAFETY FENCE - STD. & SPEC. 3.01 REFER TO VARIANCE ION PAGE 5 FOR PAVED WASH RACK CULVERT INLET SEDIMENT TRAP � CLASS Z RIP RAP RIPRAP \ \ HEADWALL `COS INVERT \ PIPE FLOW �� I 1 , VDOT #3, #35-/7, OR #5 -�� ► SEDIMENT STORAGE AREA I f COARSE AGGREGATE I *STORAGE REQUIREMENTS EQUIVALENT `\ \ TO THAT OF TEMPORARY SEDIMENT TRAP, STD. & SPEC. 3.13 401 C.Y./ACRE WET STORAGE PERSPECTIVE VIEW (BELOW BASE OF STONE) (B 67 C.Y./ACRE DRY STORAGE (BASE OF STONE TO TOP OF STONE BERM) PIPE INVERT NATURAL GROUND 1' 2' RIPRAP HEADWALL Napo no AREAS TO BE DISTURBED (CUT, FILLED, ETC.) 3' FLOW -CLASS7 RIPRAP VDOT #3, #357, OR #5 COARSE AGGREGATE MAX. SEDIMENT DEPTH (CLEAN OUT POINT) AT 1/2 VOLUME OF WET STORAGE AREA ELEVATION SOURCE: NORTH CAROLINA SEDIMENT CONTROL COMMISSION PLATE. 3.08-2 STONE CONSTRUCTION ENTRANCE GROUND 70' MIN. FILTER CLOTH 6" MIN. I Al SIDE ELEVATION 12' MIN.* 70' MIN. B WASHRACK i- (❑PTI❑NAL) 10' L VDOT #1 POSITIVE DIRAINAGE COURSE AGGREGATE B ( TO SEDIMEN'T TRAPPING DIEVICE * MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS VIEW PLAN VIE SECTION A -A EXISTING PAVEMENT 5:1 MOUNTABLE BERM (❑PTI❑NAL) T 10' MIN. EXISTING PAVEMENT 10' MIN. REINF❑RCED CONCRETE ` DRAIN SPACE SECTION B-B SOURCE: ADAPTED from 1983 Maryland Standards for Soil erosion and Sediment Control. and Va. ":DSWC O TEMPORARY SEDIMENT TRAP I nRCINIAi *SEE PLATE 3.13-1 I' VARIAB LE* V/AR IAR1 FF tL COARSE AGGREGATE CLASS 1 RIPRAP CROSS SECTION OF OUTLET CLASS 1 RIPRAP LENGTH (IN FEET) 6 X DRAINAGE AREA (IN AC.) DIVERSION DIKE COARSE AGGREGATE EXCAVATED FILTER CLOTH AREA COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) SOURCE: VA. DSWC PLATE. 3.13-2 Plnfa 3 n2-1 STD & SPEC 3.03 CONSTRUCTION ROAD STABILIZATION CRS Practice Description The temporary stabilization of access roads, subdivions roads, parking areas, and other on -site vehicle transportation routes with stone immediatly after grading to reduce the erosion of temporary roadbeds by constrcution traffic during wet weather, and to prevent having to regrade permanent roadbeds between the time of initial grading and final stabilization. Conditions Where Practice Applies Wherever stone -base roads or parking areas are constructed, whether permanent or temporary, for use by construction traffic. Construction Specifications Temporary Access Roads and Parking Areas 1. Temporary roads shall follow the contour of the natural terrain to the extent possible. Slopes should not exceed 10 percent. 2. Temporary parking areas should be located on naturally flat areas to minimize grading. Grading should be sufficient to provide drainage but should not exceed 4 percent. 3. Roadbeds shall be al least 14 feet wide for one-way traffic and 20 feet wide for two-way traffic. 4. All cuts and fills shall be 2:1 or flatter to the extent possible. 5. Drainage ditches shall be provided as needed and shall be designed and constructed in accordance with STORMWATER CONVEYANCE CHANNEL, Std. & Spec 3.17. 6. The roadbed or parking surface shall be cleared of all vegetation, roots and other objectionable material. 7. A 6-inch course of VDOT #1 Coarse Aggregate shall be applied immediatly after grading or the completion of utility installation within the right-of-way. Filter fabric may be applied to the roadbed for additional stability. Design specifications for filter fabric can be found within Std. & Spec. 3.02, TEMPORARY STONE CONSTRUCTION ENTRANCE. In "heavy duty" traffic situations (see Table 3.02-A) stone should be placed at an 8- to 10-inch depth to avoid excessive dissipation or maintainence needs. Permanent Roads and Parking Areas Permanent roads and parking areas shall be designed and constructed in accordance with appicable VDOT or local criteria except that an initial base course of gravel of at least 6 inches shall be applied immediately following grading. Vegetation All roadside ditches, cuts, fills and disturbed areas adjacent to the parking areas and roads shall be stabilized with appropriate temporary or permanent vegetation according to the applicable standards and specifications contained in this handbook. Maintenance Both temporary and permanent roads and parking areas may require periodic top dressing with new gravel. Seeded areas adjacent to the roads and parking areas should be checked periodically to ensure that a vigorous stand of vegetation is maintained. Roadside ditches and other drainage structures should be checked regularly to ensure that they do not become clogged with silt or other debris. O MINIMUM TOP WIDTH (W) REQUIRED FOR SEDIMENT TRAP EMBANKMENTS ACCORDING TO HEIGHT OF EMBANKMENT (FEET) W H HO W 1.5 0.5 2.0 2.0 1.0 2.0 2.5 1.5 2.5 3.0 2.0 2.5 3.5 2.5 3.0 H0 H 4.0 3.0 3.0 4.5 3.5 4.0 5.0 4.0 4.5 IRCE: VA. DSWC DD TEMPORARY DIVERSION DIKE SOURCE: VA. DSWC _� 113" min. I l l l l l f I k k�k�kkl. 4.5' min. Compacted Sail Flow ORIGINAL GROUND ELEV. PLATE 3.09-1 PLATE. 3.13-1 ELEVATION 36 IN MIN. FENCE POST LENGTH WOVEN SLIT FILM FENCE POST 18 IN MIN. GEOTEXTILE ABOVE GROUND FENCE POST DRIVEN EMBED GEOTEXTILE A MIN. OF 15 IN INTO MIN. OF 8 IN VERTICALLY THE GROUND INTO THE GROUND. BACKFILL AND COMPACT THE SOIL ON BOTH SIDES OF GEOTEXTILE. CROSS SECTION POSTS STEP 1 STEP 2 STAPLE STAPLE STAPLE STAPLE TWIST POSTS TOGETHER STAPLE STAPLE STEP 3 FINAL Ugg CONFIGURATION , STAPLE STAPLE JOINING TWO ADJACENT SILT FENCE SECTIONS (TOP VIEW 1 OF 2 'sF _ SILT FENCE - DETAIL F-4 FILTER BAG STANDARD SYMBOL N FB didwh A44,/j{ '' ,�•'':.' '+ r_`.'` r•' ,may �T FLAW •: .. •S, '. ::••�• .�t ,•p• ,tyti 4'.y• .'f•:. •�ry� ppjj�� _ -ram PUMP DISCHARGE HOSE 12 IN MIN. ULCH. LEAF/WOOD COMPOST. PLAN VIEW WOODCHIPS. SAND. OR STRAW BALES STRAP FLAW ne'J. ..'.:.:'.il..,L:.r,^ SLOPE �1�=�. ;;;r,>r:' r• 5% MAX. ELEVATION FILTER BAG 8 IN MIN. CONSTRUCTION SPECIFICATIONS 1. TIGHTLY SEAL SLEEVE AROUND THE PUMP DISCHARGE HOSE WITH A STRAP OR SIMILAR DEVICE. 2. PLACE FILTER BAG ON SUITABLE BASE (E.G., MULCH, LEAF/WOOD COMPOST, WOODCHIPS, SAND, OR STRAW BALES) LOCATED ON A LEVEL OR 5X MAXIMUM SLOPING SURFACE. DISCHARGE TO A STABILIZED AREA. EXTEND BASE A MINIMUM OF 12 INCHES FROM EDGES OF BAG. 3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE FILTER BAG IN ACCORDANCE WITH THE MANUFACTURER RECOMMENDATIONS. AS THE BAG FILLS WITH SEDIMENT, REDUCE PUMPING RATE. 4. REMOVE AND PROPERLY DISPOSE OF FILTER BAG UPON COMPLETION OF PUMPING OPERATIONS OR AFTER BAG HAS REACHED CAPACITY. WHICHEVER OCCURS FIRST. SPREAD THE DEWATERED SEDIMENT FROM THE BAG IN AN APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH BY THE END OF THE WORK DAY. RESTORE THE SURFACE AREA BENEATH THE BAG TO ORIGINAL CONDITION UPON REMOVAL QF THE DEVICE. 5. USE NONWOVEN GEOTEXTILE WITH DOUBLE STITCHED SEAMS USING HIGH STRENGTH THREAD. SIZE SLEEVE TO ACCOMMODATE A MAXIMUM 4 INCH DIAMETER PUMP DISCHARGE HOSE. THE BAG MUST BE MANUFACTURED FROM A NONWOVEN GEOTEXTILE THAT MEETS OR EXCEEDS MINIMUM AVERAGE ROLL VALUES (MARV) FOR THE FOLLOWING: GRAB TENSILE 250 LB ASTM 0-4632 PUNCTURE 150 LB ASTM D-4833 FLOW RATE 70 GAL/MIN/FT& ASTM D-4491 PERMITTIVITY (SEC- 1.2 SEC-' ASTM D-4491 UV RESISTANCE 70X STRENGTH 0 500 HOURS ASTM D-4355 APPARENT OPENING SIZE (AOS) 0.15-0.18 MM ASTM D-4751 SEAM STRENGTH 90% ASTM D-4632 6. REPLACE FILTER BAG IF BAG CLOGS OR HAS RIPS, TEARS, OR PUNCTURES. DURING OPERATION KEEP CONNECTION BETWEEN PUMP HOSE AND FILTER BAG WATER TIGHT. REPLACE BEDDING IF IT BECOMES DISPLACED. MARYLAND STANDARDS AND SPECIFICATIONS FOR SOIL EROSION AND SEDIMENT CONTROL U.S. DEPARTMENT OF AGRICULTURE 2011 MARYWVD DEPARTMENT OF ENVIRONMENT NATURAL RESOURCES CONSERVATION SERVICE WATER MANAGEMENT ADMINISTRATION DEWATERING PRACTICE STD. & SPEC. 3.26 Hirst hter & Environment, LLC Stormwater & Stewardship • 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices. us O TIi MLMM KI1P1MG L) h(UMAw Lim No. 049M O i�t -4- k'11, $jpN� $LZ LL 0 UJ I..L 1..` U) W J �= F-- �--- z W 0 U 2 Q W 0 V/ 1- W w 0 W J J Q I i 0 ry Z O U) W PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 9/4/2019 SHEET: TYPICAL ORIENTATION OF TREATMENT — 1 (SOIL STABILIZATION BLANKET) SHAI I OW ON SHALLOW SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE. B ERM WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, BRING THE MATERIAL OVER THE BERM AND ANCHOR IT BEHIND THE BERM. ON STEEP SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION. TURN THE END UNDER 4" AND STAPLE AT 12" INTERVALS. :w IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL POSSIBLE. SOURCE: ADAPTED FROM LUDLOW PRODUCTS BROCHURE PLATE: 3.36-1 The Virginia Stream Restoration & Stabilization 'Best Man. agement Practices Guide DETAIL 5.1, PUMP -AROUND PRACTICE Dewatering Device <1 z PLAN Sheeting — Base Flow + 1 Foot Work Area (2 Foot Minimum). Cross Section Of Sandbag/Stone Diversion SECTION A —A Adapted From Maryland's Waterway Construction Gudielines, TEMPORARY, 11ISTREAU DECEMBER 20 00NSTRUCTION MEASURES VIRG,INIA DEPARTMENT OF CON3ER,YATlOBRECREATION- 11 STAKES, STAPLES, do PINS FOR INSTALLATION OF TREATMENT — 2 SOIL STABILIZATION MATTING 3-1/4" 10"" MiN. STAKE 11 GAUGE STEEL 6°x 1 "x6" STAPLE STAPLE ti7z, DIA. WASHER 18 3/ 1 6" DIA. STEEL PIN 1) 1x4 TRIANGULAR SURVEY STAKE — MINIMUM 10" IN LENGTH. PLACEMENT OF THE STAKE ACROSS THE FLOW OF THE WATER IS THOUGHT TO PROVIDEEFFECT" TO HELP PIN SLOW VELOC INBALL 2) 11 GAUGE STEEL — MINIMUM 1" WIDE BY 6" IN LENGTH STEEL STAPLE — 2"x8" STAPLE MAY BE REQUIRED IN CERTAIN SOIL CONDITIONS. 3) STEEL PINS — 3/16 DIAMETER STEEL PIN BY 18" IN LENGTH WITH A 2" DIAMETER WASHER ON TOP. (SEE ILLUSTRATION) SOURCE: PRODUCT LITERATURE FROM GREENSTREAK, INC. PLATE: 3.36-3 TYPICAL TREATMENT — 1 SOIL- STABILIZATION BLANKET) INSTALLATION CRITERIA ANCHOR SLOT *f NOTES n APPROXIMATELY 200 STAPLES REQUIRED PER 100 SQ. YDS. MATERIAL ROLL. � ANCHOR SLOTS, JUNCTION SLOTS & CHECK SLOTS TO BE BURIED 6" TO 12" 12" MAX. 4:1 OR FLATTER 6" MAX. STEEPER THAN 4:1 JUNCTION SLOT EDGE AND END JOINTS I I I I I TO CHECK SLOT B E SNUGLY ABUTTED (JUTE MESH WILL HAVE TERMINAL FOLD STAPLED LAP JOINT IN LIEU OF EDGE JOINT) LAP JOINT 2" MIN. I I I I (JUTE MESH ONLY) I I I 5' MAX. 4:1 OR FLATTER 3' MAX. STEEPER THAN 4:1 I I I T I I (4 I I 5" TO 12" I I I I I I I T I I I I I I i I I I I I TAMP CHECK SLOT iL_ FIRMLY If 211 [Till 1 1" 1T6,1 JUNC122I1" SLOT TAMP FIRMLY 211 1C"HTt�' SZ'T I I I I I I I I I I I I I I I I I I I I I VAR. VAR. TO 811 M N. PLAN VIEW STAPLING DIAGRAM *CHECK SLOTS AT MIN. STAPLE FORMED FROM NO.11 STEEL WIRE. 50' C—C INTERVALS; 8" STAPLE MIN. LENGTH FOR SANDY SOIL. NOT REQ.'D WITH ALL C" C7AM C Anini I CM1InTu Cno nru CO Cnil .. .. 611 TO 1211 SOURCE: VDOT ROAD AND BRIDGE STANDARDS TERMINAL FOLD ON 411 -- TAMP FIRMLY F 1 211 PLATE: 3.36-2 ORANGE CONSTRUCTION �— FENCE AS DIRECTED BY DESIGN ENGINEER LLLLLLLLLLLLLL LLLLLLLLLLLLLL UNDISTURBED GROUND In 10-12' TYP. MULCH ACCESS ROAD DETAIL NOT TO SCALE NOTES: 1. ACCESS ROUTES TO BE VERIFIED BY ENGINEER AT PRE -CONSTRUCTION MEETING. REVISIONSTOTHE ALIGNMENT THAT MINIMZE TREE 6" MIN. THICK LAYER OF DISTURBANCE ARE ENCOURAGED AND REQUIRE REVIEW AND WOOD CHIP MULCH APPROVAL BY DESIGN ENGINEER. REPLENISHED AS NEED DURING CONSTRUCTION 2. CONTRACTOR SHALL MAINTAIN MULCH MAT THROUGHOUT CONSTRUCTION PERIOD. MULCH CAN REMAIN IN PLACE AT A MAXIMUM DEPTH OF 1'. 3. THE HAUL ROAD IS DESIGNED TO PREVENT COMPACTION OF EXISTING SOILS USING LOW GROUND PRESSURE EQUIPMENT WHICH EXERTS NO MORE THAN 8 PSI. IF T HE CONTRACTOR INTENDS TO USE ANY EQUIPMENT WITH HIGHER LOADS, ADDITIONAL PROTECTION MEASURES MUST BE PROVIDED SUCH AS HARDWOOD MATS (SEE DETAIL BE LOW) . MULCH ACCESS ROAD DETAIL NOT TO SCALE STAIR S TEPPING L.L_xCUT SL OPE� S DEBRIS FROM SLOPE ABOVE a� • 40"-50" SOURCE: VA. DSWC WATER, SOIL AND FERTILIZER ARE HELD BY STEPS — PLANTS CAN BECOME ESTABLISHED ON THE STEPS. PLATE 3.29-1 GROOVING SLOPAES I —I 11— I =1I1=1I I � II1=1I s 1-12 I-II-II- =III=III GROOVING IS CUTTING FURROWS ALONG THE CONTOUR OF A SLOPE. I I P-I 1(— IRREGULARITIES IN THE SOIL '-1 SURFACE CATCH RAINWATER AND PROVIDE SOME COVERAGE OF LIME, FERTILIZER AND SEED. SOURCE: VA. DSWC PLATE 3.29-2 Hirschter& Environment, -LLC Stormwater & Stewardship SERVIII 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 eCOsysterl'lservices. us .�AirTH o.A o w�►>(� �.nva � w Lle. No. 049M BZpN�, $13` LL 0 L.L wM L.L V W J ~ o 0 W w G L.L. Q o Cf) w 1- W m <( J J T� i 0 Z O W PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 9/4/2019 SHEET: m N a m 0 0 N N Q w J J } U) w O Q U H w w t- U) NOTES: 1- SEE PLANTING SOIL SPECIFICATI( ADDITIONAL REQUIREMENTS. BEFORE STARTING SOIL FRACTURING APPLY 2-3" OF COMPOST OVER EXISTING GRADE EXISTING GRADE AFTER ROUGH GRADING EXISTING GRADE AFTER ROUGH GRADING C6 APPLY 34" OF COMPOST AND REQUIRED CHEMICAL ADJUSTMENT PRIOR TO FINAL TILLING PROPOSED FINISHED GRADE AFTER SETTLING— v N FRACTURE SOIL USING A BACKHOE, DIG INTO THE SOIL AND THE COMPOST, LIFT THE SOIL AND DROP IN PLAE TO FRACTURE COMPACTION, REPEAT OVER ENTIRE PLANTING AREA NOTES: I 1- FOR PLANTING AREAS NARROWER THAN 8' REDUCE THE DISTANCE BETWEEN PAVING AND SOIL FRACTURING FROM 2' TO 1'. 2- SEE PLANTING SOIL SPECIFICATION FOR ADDITIONAL REQUIREMENTS. WIDE TRENCH BACKFILL TRENCH WITH COMPOST EXISTING SOIL 4ISHED GRADE AFTER -LING AND SETTLING 3-4" OF COMPOST AND REQUIRED CHEMICAL ADJUSTMENTS LL COMPOST INTO TOP OF SOIL EXISTING SOIL MODIFIED EXISTING SOIL -COMPACTED SUBSOIL (RIPPING) NTS STEP ONE STEP TWO COMPACTED SUB SOIL NTS 4209-023A 2'± PAVEMENT, DO NOT FRACTURE SOIL ADJACENT TO PAVEMENT _-ri-rP -, �i-_ � % [,/ I FINISH GRADE VEHICLE DESIGN STATIC LOAD "P" AT 27 INCHES ABOVE GRADE (NTS) INSTALL TOP OF CONCRETE AND ANCHOR POST AT GRADE USE NOTED PIER I'D" DIAMETER SONOTUBE IF NEEDED TO AVOID CAVE IN AT TOP f ROUND POST ANCHOR SLEEVE BY TRAFFICGUARD 4,000 PSI CONCRETE PIER AT NOTED DIAMETER & HEIGHT '. VERTICAL REBAR AT NOTED QUANTITY, SIZE &LENGTH --, PVC DRAIN PIPE AT LENGTH FROM ROCK TO BOLLARD AT DIAMETER TO MATCH BOLLARD #3 REBAR HOOP TIES ' AT THE NOTED PIER }` DIAMETER MINUS 4" WITH 12" TIE LAP INSTALLED AT 2" CLEAR FROM TOP & BOTTOM OF PIER AS SHOWN 3 INCHES MIN THICK ROCK FRENCH DRAIN PIER BASE :S s FRESH POURED CONCRETE PIER SHALL BE PROTECTED FROM FREEZING FOR 14 DAYS AND WILL REACH DESIGN STRENGTH AFTER 28 DAYS EARTH PRESSURE Q MIAX PSF ffr "s. . A DIM N R FORCE r f 1 r D DIM c DIM T ,.•� 8 016d A DIM 7" CV LOAD STRESS DIAGRAM NOTES: 1. THIS IS A GUIDELINE FOR ESTIMATING, SITE SPECIFIC CONDITIONS SHOULD BE VERIFIED. 2. INSTALLATION TO BE COMPLETED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS. 3. ALL DIMENSIONS ARE CONSIDERED TRUE AND REFLECT MANUFACTURER'S SPECIFICATIONS. 4. DO NOT SCALE DRAWING. 5. CONTRACTOR'S NOTE: FOR PRODUCT AND COMPANY INFORMATION VISIT www.CADdetails.comAnfo REFERENCE NUMBER 4209-023A. MODEL RPT3501 F - TRAFFICGUARD@ ROUND POST "TWIST -IN" WITH FLANGE (3.5" OD), FOOTING / ANCHOR SYSTEM DETAILS PROTECTED BY COPYRIGHT @2016 CADDETAILS.COM LTD. NOTES: 1- SEE PLANTING SOIL SPECIFICATIONS FOR ADDITIONAL REQUIREMENTS. COMPACTED SURFACE SOIL NTS REVISION DATE 04/06/2016 1 4209-024 i� x " � y f' IM USE #3 SCHEDULE 40 STEEL END CAP HEMISPHERICAL DOME NOTE:PREP BOTH THE TUBE AND CAP FOR WELDING -GRIND AND SMOOTH CONTACT SURFACE AFTER WELD USE #4 SCHEDULE 40 STEEL END CAP HEMISPHERICAL DOME NOTE:PREP BOTH THE TUBE AND CAP FOR WELDING -GRIND AND SMOOTH CONTACT SURFACE AFTER WELD -SEE VIEW A FINISHED GRADE AFTER DST INTO TOP EXISTING SOIL ''�--- USE #6 SCHEDULE 40 STEEL END CAP HEMISPHERICAL DOME NOTE:PREP BOTH THE TUBE AND CAP FOR WELDING -GRIND AND SMOOTH CONTACT SURFACE AFTER WELD NOTE BAYONETTE MOUNT ON ONE SIDE ONLY (ALL SIZES) D-,o DRILL OUT PIPE FOR 3/4 SCHEDULE 40 PIPE (STEEL) - WELD IN PLACE THRU DIAMETER OF #6 TUBE (ONLY) - EXTERIOR a, SURFACE TO BE FILLED AND SMOOTH AROUND WELD I i i i f @ SEE VIEW B �� SEE VIEW C r �- -1.77" 2.2" { 4.5" 6.625" NOTES: 1. INSTALLATION TO BE COMPLETED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS. 2. ALL DIMENSIONS ARE CONSIDERED TRUE AND REFLECT MANUFACTURER'S SPECIFICATIONS. 3. DO NOT SCALE DRAWING. 4. CONTRACTOR'S NOTE: FOR PRODUCT AND COMPANY INFORMATION VISIT www.CADdetails.com/info REFERENCE NUMBER 4209-024. MODEL RPT3501 - TRAFFICGUARD@ ROUND POST "TWIST -IN" (35' OD), ASSEMBLY DETAIL 0 REVISION DATE 04/06/2016 on Muchman'#Afater & Environment, LLC Stormwater & Stewardship S 1739-A Allied Street Charlottesville, VA 22903 540.239.1428 ecosystemservices.us � Q O WII.IJAM KIPI.Ilvti U IfUMAW Lac. Na 049M O cl- 4-lc` BIpNA3, I- LL O w W 7� O J Lu <C 0 W m Q J J � T. 0 Il z 0 w or PROJECT MANAGER: WKM DESIGNED: WKM DRAWN: JNB PROJECT #: 17-0042 DATE: 9/4/2019 SHEET: CAUdetalls.com PROTECTED BY COPYRIGHT ©2016 CADDETAILS.COM LTD. CADdetails.com