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HomeMy WebLinkAboutWPO201400092 Plan - VSMP WPO VSMP 2016-07-01W=40 m, qkQ OWNER: ROUTE 240 HOLDINGS, LLC P.O. BOX 1467 CHARLOTTESVILLE, V4 22902 DEVELOPER: RIVERBEND DEVELOPME=NT, INC. 455 SECOND STREET SE, SU1 TE 400 CHARLOTTESVILLE, V4 22902 A TTN: ALAN TAYLOR ENGINEER: COLLINS ENGINEERING 200 GARRETT ST; SUITE K CHARLOTTESVILLE, VA 2.2902 (434)293-3719 PRE-APPLICA TION Sheet Number Sheet Title 1 CONFERENCE.• SEPTEMBER 23, 2013 EXISTING CONDITIONS 3 TAX MAP NO.: 05600-00-00-05700 (D.B. 2478, PG 251) POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN 056A2-01-00-06200 (D.B. 2525, PG. 75) PROJECT AREA: 14.61 AC (05600-00-00-05700 R-6 PORTION) EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 2.13 AC (056A2-01.`-00-06200) EROSION & SEDIMENT CONTROL PLAN PHASE I 10 16.74 AC. 11 EROSION & SEDIMENT CONTROL CALCULATIONS ZONING: R-6 RESIDENTIAL (05600-00--00-05700 - 14.61 AC); ENTRANCE CORRIDOR (EC) R-.2 RESIDENTIAL (055A.2-01--00-06200 - 2.13 AC) DENSITY:• R-6 ALLOWABLE DENSITY FOR STANDARD LEVEL CLUSTER DEVELOPMENT 6 D.U./AC. R-2 ALLOWABLE DENSITY FOR BONUS LEVEL CLUSTER DEVELOPMENT- 3 D.U./AC. PROPOSED DENSI TY- R-6 SINGLE FAMILY DETACHED: 1 R-6 TOWNHOMEISINGLE FAMILY ATTACHED: 1.9 (TOTAL FUTURE LOTS) R-2 TOWNHDME/SINGLE FAM1L Y ATTACHED: 3 (FUTURE SUBDIVISION) TOTAL PROPOSED LOTS: 23 R-6 DENSI TY 20 D. U./14.61 AC. = 1.37 D.U./AC. R-2 DENSI TY 3 D. U./,' .13 AC. = .1.41 D. U./AC. OPEN SPA CE. OPEN SPACE A=1.86` OC. OPEN SPACE F=0.05 ac. OPEN SPACE B=0.05 oc.. OPEN SPACE G= 0.03 roc. OPEN SPACE C=2.86 cc. OPEN SPACE" H=0..22 cc. OPEN SPACE D=0.04 cc. OPEN SPACE 1=0.10 cc. OPEN SPACE E=0.05 vc.. 5.26 AC: / 16.74 AC. =- 31.49 OPEN SPACE TO BE OWNED AND MAINTAINED BY THE HOMEOWNERS ASSOCIATION. ALL. OPEN SPACE SHALL BE RESERVED IN A DEED FOR THE COMMON USE OF LOT OWNERS IN THE SUBDIVISION. STEEP SLOPES: NO PRESERVED STEEP SLOPES ARE LOCATED ON THE PROPERTY. MANAGED STEEP SLOPES ARE LABELED ON THE EXISTING CONDITIONS SHEET OFFSITE DISTURBANCE: NO OFFSITE DISTURBANCE IS PROPOSED WITH THIS PLAN. BUILDING HEIGHTS.• MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET SETBACKS. FRONT- 5' SIDE: 5' REAR. 20' SUBDIVISION STREETS. • CURB & GUTTER WA TERSHED: LICKINGHOLF CREEK WATER SUPPL Y WATERSHED AGRICULTURAL/ FORESTAL DISTRICT- NONE TOPO & SURVEY- TOPOGRAPHY PROVIDED BY A COMBINATION OF ROUDABUSH, GALE AND ASSOCIATES AND LOUISA AERIAL SURVEYS INC., JANUARY 2007 THE BOUNDARY LINE INFORMATION IS PROVIDED BY ROUDABUSH, GALE:, ANC? ASSOCIATrES INFORMATION FIELD VERIFIED BY COLLINS ENGINEERING MAY 2014. DA TUM: EXISTING VEGETA TION: PARTIALLY WOODED LIGHTING• NO LIGHTING IS PROPOSED PARKING. 2 OFF-STREET PARKING SPACES SHALL BE PROVIDED ON EACH ILOT PARKING WILL BE PROVIDED ON ONE -SIDE OF THE STREET ON FIREMONT ST, NEWPORT ST, AND BIN10N DRIVE. OFF STREET - 128 (INCLUDES FUTURE. TOWNHOME/SF ATTACHED LOTS) ON STREET _ __- 37 PARALLEL ON -STREET SPOTS TOTAL - 165 SPACES GUEST SPACES REQ'D= 73 UNI TS/4 GUEST SPACE: PER UNI T=18.2'5 GUEST SPACES GUEST SPACES PROVIDED=43 PARALLEL PARKING' SPACES PHASING. NONE PROFFERS: NONE BUILDING SITES. FUTURE LOTS 1-64 MAY NOT BE FURTHER DIVIDED. EACH PARCEL CONTAINS A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENTS OF THE ALBEMARLE COUNTY ZONING ORDINANCE. BURIAL. SITES. NO CEMETERIES WERE FOUND DURING FIELD INVESTIGATION OF TME SITE, STREAM BUFFERS. • THE STREAM BUFFERS SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE RETAINING WALLS NONE IMPERVIOUS AREAS- ROADS & SIDEWALK. ° 5.70 AC HOMES • 2.86 AC TOTAL: 8.56 AC 0 IN I IAN] 2101 [a (013 BIB$ .. .. .. .. .. .. .. .. .. .. . . . . . . t • t � '1TVHITEHALL ALBEMARLE COUNTY, VIRGINIA SHEET LAYOUT SCALE: 1" = 150' NOTES.• 1) THIS PROPERTY DOES NOT LIE WITHIN AIN AGRICULTURAL ANDIOR FORESTAL DISTRICT. 2) THIS PROJECT IS NOT LOCATED WITHIN IFLOODPLAIN LIMITS, BASED ON FEMA MAP NUMBER 51003CO229D ADOPTED FEBRUARY 4, 2005. 3) EACH LOT AS SHOWN HEREON CONTAIN' A BUILDING SITE WHICH MEETS THE REQUIREMENTS OF SECTION 4.2.2(6)1 (18-520) 4) ALL PROPOSED EASEMENTS SHALL BE DIEDICATED TO PUBLIC USE. 5) STREET TREES SHALL BE PROVIDED ALONG ALL THE PUBLIC STREETS 50' D.C. IN ACCORDANCE WITH VDDT AND ALBEMARLE COUNTY STANDARDS ROADS A WPO PLAN SHEET LIST Sheet Number Sheet Title 1 COVER SHEET 2 EXISTING CONDITIONS 3 GRADING & MITIGATION PLAN 4 PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN 6 POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN 6 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 7 STORMWATER MANAGEMENT DETAILS & CALCULATIONS 7A STORMWATER MANAGEMENT DETAILS 8 EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS 9 EROSION & SEDIMENT CONTROL PLAN PHASE I 10 EROSION & SEDIMENT CONTROL PLAN PHASE it 11 EROSION & SEDIMENT CONTROL CALCULATIONS 12 EROSION & SEDIMENT CONTROL CALCULATIONS 13 EROSION & SEDIMENT CONTROL CALCULATIONS TOTAL LEGEND EXISTING CULVERT CUL VER T DROP INLET & STRUCTURE NO. CURB CURB & GUTTER PROPOSED PAVEMENT • 01*1 APPROVED by tf]e Albemarle Ceunfy 00`0munitY Development Department Date File EARTH DITCH DRI VEWA Y CULVERT BENCH MARK i e CLEARING LIMITS VDOT STANDARD STOP SIGN --------200--------- EXIS77NG CONTOUR PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVATION „/— TBC DENOTES TOP/BACK OF CURB TIB DENOTES TOP OF BOX No, Parcel ID Owner Total Acres D.B., ?9. Zoning 1 2 056A20400000A0! 056A2040003500 PARKSIDE VILLAGE HOMEOWNERS ASSOCIATION INC WALTON, THOMAS C OR HEATHER J 5.694 0.218 3205/626 2848/441 R-6 R-6 3 056A20400000A2 PARKSIDE VILLAGE HOMEOWNERS ASSOCIATION INC 0.014 3205/626 675 4 056A2040006800 DEAN, RODNEY E JR, TRUSTEE; RODNEY E DEANE JR TRUST U/A DTD 0.108 41221202 R-6 5 056A2040006900 JORDAN, SARAH B 0.040 3007/304 R-6 6. 056A2040007000 NICHOLA PROPERIIES LLC 0.040 3072J720 R-6 7 056A2040007100 DILLARD, WILLIAM H 0.114 I - - - - - - - - - - - - - - - - - - - - ....... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 056A2010006300 THREE NOTCHD ROAD-].�QUTE-2-40 1.000 . . . . R-2 -- --- -- -- --- ------------ ------ ---- ------ -------- -------------------- -- ------------- ------- ----- .. ........ - -- -------- 1,000 1591294 R-2 11 056A2-010006500 COLLINS, MARIAN B 1.050 970/668 R-2 csx kAftA6AD .056A2010006600 FLANAGAN, ROBERT MICHAEL 0,504 SW5647wW 21629' .......... R-2 ----- ----- --- ---- ---------- ---------- - FLANAGAN, ROBERT M 0.640 21061418 .......... �-4 ---------------- ------------------ ------------------------- 20'WATERLINE EASEMENT, 38004'06k` FLANAGAN, ROBERT M0A50 ---- ----- - D.B. 611, PG. R-2 15 056A20100067130 78"4133:33 'W 0.450 2388/36-0 R-2 D.B. 692, PG. 148 Bm 056A2010006800 ROUTE 240 HOLDINGS LLC 1070 POSTED P U IT -t -TED-8P ,��TOP OF L1_ 17 056A2010006100 MH7 -io -6 1 13.052 20121352 HI EX ROW TAPERS OUT. FROM 40' - 056A2040000100 MACLEAN, GERARD 0.271 TO A WIDTH OF,50'AT BOUNDARY R-6 If 056A2040000200 BEASLEY, ALBA 0.212 2275/096 R-6 20 056A2040000300 JONES, BENJAMIN MARTIN OR SARA BETH 0,212 EXISTING 40'STRIP. RESERVED R-6 21 056A2040000400 HILL TOP ST FOR FUTURE EXTENSION OF HILL 3924/271 R- 6 22 No, Parcel ID Owner Total Acres D.B., ?9. Zoning 1 2 056A20400000A0! 056A2040003500 PARKSIDE VILLAGE HOMEOWNERS ASSOCIATION INC WALTON, THOMAS C OR HEATHER J 5.694 0.218 3205/626 2848/441 R-6 R-6 3 056A20400000A2 PARKSIDE VILLAGE HOMEOWNERS ASSOCIATION INC 0.014 3205/626 R-6 4 056A2040006800 DEAN, RODNEY E JR, TRUSTEE; RODNEY E DEANE JR TRUST U/A DTD 0.108 41221202 R-6 5 056A2040006900 JORDAN, SARAH B 0.040 3007/304 R-6 6. 056A2040007000 NICHOLA PROPERIIES LLC 0.040 3072J720 R-6 7 056A2040007100 DILLARD, WILLIAM H 0.114 3020/075 R-6 9 056A2010006300 UNION MISSION BAPTIST CHURCH 1.000 3711553 R-2 10 056A2010006400 UNION MISSION CHURCH C/O ELIZABETH BROWN 1,000 1591294 R-2 11 056A2-010006500 COLLINS, MARIAN B 1.050 970/668 R-2 12 .056A2010006600 FLANAGAN, ROBERT MICHAEL 0,504 3678/232 R-2 13 056A2010006700 FLANAGAN, ROBERT M 0.640 21061418 R-2 14056A20100067AO FLANAGAN, ROBERT M0A50 2091/472 R-2 15 056A20100067130 FLANAGAN, ROBERT M 0.450 2388/36-0 R-2 16 056A2010006800 ROUTE 240 HOLDINGS LLC 1070 2675/384 L1_ 17 056A2010006100 ROUTE 240 LLC C/O REDL[GHT MANAGEMENT OR MAIN STREET HOLDINGS 13.052 20121352 HI 18 056A2040000100 MACLEAN, GERARD 0.271 2865/731 R-6 19 056A2040000200 BEASLEY, ALBA 0.212 2275/096 R-6 20 056A2040000300 JONES, BENJAMIN MARTIN OR SARA BETH 0,212 4369/199 R-6 21 056A2040000400 MOORE, RICHARD OR OANA 0.199 3924/271 R- 6 22 040000500 KIRBY, PHILIP M OR JENNIFER 1 0.239 2229/297, R-6 ALY 4 -7 GgAPJTJ�,, C 3. NO PRESERVED STEEP SLOPES ARE LOCATED ON THE PROPERTY. THE MANAGED STEEP SLOPE IS LABELED, A 0 100 , 50 d 4. 100 WPO STREAM BUFFER IS SHOWN. B 7 WPQl JOP F w= 609.0 z 0 1 ;/ ti T 1001 STREAM BUFFER ----------- 0 Qr I inch B M u'll TPF A O'r�' _21 10 0 SCOTT �RtOLLINS��Z C No. 305791 0 Z� IONAL _V� � Z W _j 0 0 0 I JOB NO. 112066 SCALE 0 U) 20 00 0 - w m 2 U) T 0 x u z0 0 0 0 0 0 _j F- u u u u 57 0 CL C V7 0 U co z z ;7 z U) uj 0 U)® U 0 U 0 U 0 U LU 0 _j LU Lu Lu Lu 0- CL la_ n_ Lu > w — z — ic) 0 Q a > LU iv) LU LU LU LU LU LO U) LO V) .0 ce- > > , > , > > LLJ ce 0 0 O O 0 Ln m m U.1 -4 --1 1-4 —1 LJry Ln 8 rq N N NE I JOB NO. 112066 SCALE 0 1 100' 20 0 - SHEET N071 q) 2 U) T YARD DRAIN SCHEDULE MANAGED STEEP SLOPE "� OTE: LEGEND: - A {15 INLINE GRATE DRAIN) RIM. 664.2 C (15"' INLINE GRATE DRAIN) ' - � � � •::::. ACTED ', .� , ,�K Q T .... C} BE,IMP EXISTING STREAM INV OUT. 662.6 RIM. 668.5 VDOT STD. UD -4 UNDER ALL PROPOSED PUBLIC CURBING. s., , ., VDOT STD. CD -1 TO BE INSTALLED WHERE SHOWN. �',` ::::: BUFFER IMPACT INV OUT. 665.5 A-13VDOT STD. CD -2 TO BE INSTALLED AT EACH PUBLIC ROAD SAG. EXISTING STREAM BUFFER IMPACTED WITH THIS PLAN = 0.09 ACRES TOTAL AREA {O.QS AC.} REQ'D MITIGATION = 2X IMPACT 0.18 ACRES OTT OLLI 8'" ADS NYLOPLAST PIPE C-STR 34 1 , �, SC R. C N� 58 LF @ 0.5% 8" ADS NYLOPLAST PIPE ;; _ k 100.STREAM BUFFER' U No. 35791 � - 98 LF @ 5.6% `' -__. ��yrt f`, • s MITIGATION AREA PROPOSED WITH THIS PLAN - 0.18 ACRES - B (15'" INLINE GRATE DRAIN) ; RIM. 663.8 STR 34YN oWET FOND LEVEL 11 RIM. 665.7 PLANTINGS REQUIRED FOR MITIGATION AREAS: �' c""T %� ' I �aNAL E INV !N 662.3 % �- INV IN. 660.0 HARDWOOD AND/OR PINE SEEDLINGS = 0.14 X 600 = 84 INV OUT. 662.2H�2�,�� i h. , W INV OUT. 659.5 (STR 3.2) NOTES: _ I� " - . B STR 40B 1. -CENTER_- `; 8 ADS NYLOPLAST PIPE - -\ E DEPARTMENT RIPARIAN SEEDLINGS SHALL BE PLANTED AT 8x8 ON WITH TREE TUBES AND MATS IN ' 9 .5° ., _. 8 LF 0 10 _ } ACCORDANCE WITH THE CHESAPEAKE BAY LOCAL ASSISTANCE - BUFFERS MODIFICATIONAND MITIGATION GUIDANCE MANUAL 2 IT IS A GOAL OF ALBEMARLE COUNTY T - TY HAT A MINIMUM OF 85% OF THE TOTAL PLANTINGS •v"" '\ - "`, �\ + ' ` �- a ".. ''' r_-_� � STR 40B _ REQUIRED FOR BUFFER MITIGATION BE NATIVE PLANS_ - FROM THE COUNTY.PLANT \� RIM. 666,0 DATABASE. �+ 1 T S�C�D. C 1 GL. I RIPRAP� INV IN 661.7 - _-.._ -� _____ _.rT __--. ___ ..__ _- 3. MITIGATION AREAS TO BE INCORPORATED INTO EASEMENTS. _ _ ,. ,. - .. -- _.. - - - . _-- -- - - -- - - -9,W !NV OUT. 661.6 (STR 40) -- A W W "2 1 PLANTING NOTES' �� ----- 11. THE PLANTINGS SHALL FOLLOW THE STREAM BUFFER MITIGATION PLAN. J" LLI; \� \ \\ \ --.-, - - - - Q r � `ro I _.. ' . T FIN - :-- i- -- _. __ �2 HE AL PLANT LAYOUT SHOULD RESEMBLE A RANDOM AND NATURAL PLACEMENT OF PLANTS d ,.�, �, \ \\. � �y �, � ! ;-I _,._. - -... -- - . _ _ - S OR ANY OTHER �\ , r ; 4 t En _. STANDARD LANDSCAPED APPROACH WITH TREES W ROW DOT STD. EC -1, CL. I RIPRAP ` t- �. Lu 7! ":__ .__._.. : � _ _. _ORDERLY _ __ ° ' ' �\ �,: �" . ,`�jY r � =23; W1=5 ;W2=12'; / r FASHION. _ _. -. PLANTINGS SHALL ,. , THE CONTRACTOR SHALL WARRANTY THAT A MINI 85 i 5 ,d5 AT MUM OF /o OF ALL PLANT SURVIVE FOR A PERIOD OF ONE YEAR FOLLOWING PLANTING COMPLETION -- 24. THE CONTRACTOR SHALL FURNISH NURSERY GROWN PLANTS CONFORMING TO ANSI Z60.1, WITH - ¢ w w w i U 1-- i f VAR WIDTH SWM ACCESS, � i •� _ HEALTHY ROOT SYSTEMS DEVELOPED BY TRANSPLANTING OR ROOT PRUNING. TREES AND �-�' PROPOSED VAR. WIDTH _ . i s " u � & MAINTENANCE EASEMENT / __{) 5"'ECP III PIPE '� fl Q b o o 0 SHRUBS SHALL BE WELL SHAPED, FULLY BRANCHED, HEALTHY, VIGOROUS STOCK FREE FROM 54 STORM SEWER EASEMENT _ T o DISEASE INSECTS LARVAE, AND DEFECTS S / NV !N= 637.9 U �' ``� O 5 5$ £"89 -5647 W 216.29 LA TS UCH AS KNOTS, SUN SCALD, INJURIES, ABRASIONS �: / , / 55--, _ INV OUT 637.5 U is r irh rir� » i .a. x d ..� .:> :,:, .,, <. r .: .. w F w,�z..., ; . : is � � l� ,�'VDOfS D. EW � �: � .. � .. �.,��.., � � ��., :.: ,. „ ,.:.� , , ... �w��.� '��,��.s�Fl�s�.s.,:,, r ���c: \�, � � AND DISFI RE T -.--� ` , � r,�i�rrh. ,,r��r.,r,..,��.,:,... ,��rf� . - h�� -. � .r�.���v � .., :�;: �.� .� ., : ����:� ���- - �s� :�.�� .�z �a2�::..��:�h��\�� .r .. �,n � � � �� :�:�.,€�: G U MENS 1 �$ � v..�- u� - .. _ _ _._ :i- z .- - ... J � � 'S. ADAPTED TO LOCAL � � � , J � ` � cUt� � f� NURSERY GROWN STOCK SHALL COME FROM A LOCAL NURSERY OR BE AD ••': s � , C� J U U U U - ..... .Y _ _ __.. _ _ __-- _ -_ _. __. _,... ,_ . GROWING CONDITIONS AND BE GUARANTEED BY THE NURSERY AS SUCH , : �" r --. -_�� �! __j . �''� FULL FLOW Q=8,7 CGS z ¢ � c� � rs � C TONE LAY LUMP AND THE CONTRACTOR SHALL CLEAN THE TOPSOIL OF ROOTS SODS STONES, C S A � - / / t`.: ,--, c� w i .. `� �arl _ . .. 56 E IAL HARMF T "_ % '! L = ,�, Q i2 W m 107 s• ' �---__., .... OTHER XTRANEOUS MATER S UL O PLANT GROWTH. ESIGN Q10-4.5 CFS a- � _ �.__,. 77. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK 101 . c3 j' / '" > W Li WI f -_.. (/........ .. / �'.' ' .. .�;' 7 (� to (� � SHOULD BE SITUATED NEARLY PLUMB. TREES AND SHRUBS SHALL BE STAKED, AS NECESSARY, cn w - ,... TO PREVENT THEM FROM OVERTURNING. "% i > CL ui i 1 f _... ; ,; .. �' . _- _..- ' � ... .. ::�N{�� .....::..:.. ALL VEGETATION SHALL BE WATERED THE DAY AFTER PLANTING AND THEREAFTERA � � � w �_ g- ff�/ T LA G AS ,. Y� _,...... _ ,, BLOCK H .. c1�F.� :�sk•s=�s aa5 ..............._. .....,....._. .. ::. r -3N \ .., - / 'To BLOCK G ( f BH ;, �.. . . ...... .. . ...... -... - . , .......... � ,A � , _,. NECESSARY TO ENSURE SURVIVAL UNTIL THE END OF THE GROWING SEASON OF THE FIRST _, - -- H F of �- \ .. UTURE LO 1 .... ......:.: FUTURE LOTS. F OCK IL .... ; .. .../ .... ,---`�., ... _ 1.1,1 ... _ .....SL ... -�� '_ rstiwtac�s>Ea ; o r J - _ __ ..... >: YEAR. x / .. - - , _ ..- ..... ........ .. ... - .�. : .. ..•....... - .. ... .. ... ... - .... ...... r ... - 18 20 \ , Lu C .... � 671: 09 16 `17 .............. � , L� �I FUTUF�E LOITS. -.. �. THE GRASS SEED MIX LISTED ABOVE SHALL BE SPREAD THROUGHOUT THE ENTIRE STREAM .. ' r' .:. . i \ _- � BUFFER MITIGATION AREA. _ r _ 1 /..... \ ;. 1- p I '.: ^>J' � - - .,�, ,r'` �'� VDOT. STD. /+D-2 _ ! __ .. ...........j 110, ALL PLANT MATERIAL QUANTITY COUNTS ON THE PLAN ARE THE RESPONSIBILITY OF THE \ ''.: \ - '_ 4g • . � �..� - 4$�� I ,` , '... .....�. CONTRACTOR. PLANT LIST TOTALS ARE FOR CONVENIENCE ONLY AND SHALL BE VERIFIED PRIOR - :_=�� f TO BIDDING. 'BLOCK J ........ ..... . . .. x .. 1 1. HA PLANTSCHEDULE\ 103 -- � a" "_ ,.. ....�=. .. �:�• �---- �--_``: ... :..................... � ! NO CHANGES TO LA UNLESS FIRST APPROVED BY THE ALBEMARLE COUNTY _ \ 1 14B _ FUTURE.L TS,.. ... . ........... �- ... o I �... PLANNING DEPARTMENT AND THE LANDSCAPE ARCHITECT. \ i _ W ... .... . \\ W 1- ,-, w p w Of m Q Ln JOS NO. 112066 SCALE -- 60' 'SHEET NO. 3 Summary of Watersheds Summary of Drainage Areas I -Yea r 2 -Year 10 -Year Predevelopment Post- Development Predevelopment (cfs) Post- Development (cfs) Predewelopment (cfs) Post- Develo pme nt (cfs) Predevelopment (cfs) Post- Development (cfs) D.A. #1 16.91 D.A. #1A 16.51 ,Totals: 17,30 5.02 iTotals: 21.26 5.55 Totals: 60. 1 62 24.66 ~� �STOIRMWATER NARRATIVE THE STORMVVATER RUNOFF VOLUMES, VELOCITIES, AND PHOSPHORUS CONCENTRATION RESULTING FROM '-- THE PROPOSED DEVELOPMENT SHALL BE IMPROVED PRIOR TO ENTERING THE EXISTING WATERSHED. !STORMVVATERQUALITY AND QUANTITY REQUIREMENTS WILL BE MET THROUGH USE OF TWO LEVEL U WET |P0NDS '1A' AND '2B' SCOTT R. COLLINS!Z WATER QUALITY: U No., 357.91 1 -- THE STORMVVATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT WERE CALCULATED WITH THE VRRM � Hd NEW DEVELOPMENT WORKSHEET, RESULTING IN A TOTAL LOAD REDUCTION (TP) REQUIRED OF 35.57LB/YR'ND A POST- DEVELOPMENT TREATMENT VOLUME (1.5Tv) OF DRAINAGE AREAWAT 62,535 CF, AND ORAL V' ' LLI 675 -DEVELOPMENT TREATMENT VOLUME (1.5Tv) OF DRAINAGE AREA'B'AT 52,874 CF. TWO LEVEL 11 WET POST LLJ PONDS WITH 75% PHOSPHORUS REMOVAL EFFICIENCY SHALL TREAT THE DEVELOPMENT AND PROVIDE IN EXCESS OF 1.5*Tv, WHILE PROVIDING 36.21 LB1YR PHOSPHORUS REMOVAL. EVIDENCE OF COMPLIANCE WITH THE WATER QUALITY REQUIREMENTS FOR THIS DEVELOPMENT IS PROVIDED ON THE STORMWATER MANAGEMENT DETAILS AND CALCULATIONS SHEET. WATER QUANTITY: THE LEVEL 11 WET PONDS WILL DETAIN STORMWATER RUNOFF FROM THE PROPOSED DEVELOPMENT, OVERLAND DRAINAGE IMMEDIATELY UPLAND OF THE PROJECT, WITH AN ADDITIONAL ALLOWANCE FOR EXCESS CAPACITY. THE TOTAL PROJECT 1 -YEAR PRE AND POST -DEVELOPMENT OUTFLOWS ARE 17.30 cfs AND 5.02 ds, RESPECTIVELY. THE TOTAL PROJECT 2 -YEAR PRE AND POST -DEVELOPMENT OUTFLOWS ARE -- ---- -YEAR PRE AND POST- DEVELOP M ENT OUTFLOWS ARE 60.62 cfs U) ;tl_ AND 24-66 cfs, RESPECTIVELY. POND ROUTINGS AND TR -55 CALCULATIONS ARE PROVIDED ON THE Uj STORMWATER MANAGEMENT DETAILS AND CALCULATION SHEET, AND THE STORMWATER MANAGEMENT 5 CALCULATIONS PACKAGE INCLUDED WITH THIS SUBMISSION. 0.27 hrs, 140 TOP OF5� Tc=0.22 hrs. (1 00'OF OVERLAND FLOW AT 2% 0 0 MFi= 71'0 rn Uj U1 UJ UJ LLI LU CL CL 0 - Ce 73 Ce 4t LLJ ///STREAM BUFFER,' IST INGDRIVEWAY DA -EXISTING TRELLINE.. titwutWE� 21,243' LOCATION OF PROPOSED— E.R TREAM BUFF SWM FACILITY 28, co STREA NO POSEb., 'SWM FACILITY 1A CL Uj CL Z EXIST La STREAM 10 Ljj ry STING 100' Aff Aff PUFFER r TING SANITA rr STORMWATE EN DRAINAGETEA LINE LIJ \-fOOTHILL CROSSING 11 Lu BOUNDARY LINE Lj rr LU rr FOOT�ILL CROSS/ EVELOPMENT PHASES 11 & Ill SHOWN) General construction notes for Stormwater Managern nt plans 10 -i. All dams and constructed fill to be within 95% of maximum dry density 10 y U 70 Uj ul -and 2% Of Optimum moisture content. All fill material to be approved b is to be present during U cons GA JOB NO. 160 �20 112066 A. .,2. Pipe and riserjoints are to be watertight within stormwater management facilities. SCALE 3. For temporary sediment traps or basins which are to be converted to N permanent stormwater management facilities; conversion is not to take I FF19T 80 SHEET NO. place until the site is stabilized, and cr) permission has been obtained from the County erosion control inspec '--37C3 \ . Vlrg�nia'Runoff Reduction Method New Dtveioment Worksheel - v2.8 - June 2014 Total Rainfalt 43 inches Site Land Covet, Summasy SCOTT NS�Z COLLI El 5�oas Ic soils D S-0415 Total % Of Tota I 0.00 119,00 .001 6 !-- | - rvious acres i� 675 \ / \ _ _ . . . � o Li CD zL__ . |U ) | | | | | | | X^0 \ �� �� � ' — — — � - — — - — -- .� - �� �� � _ _� ~' � _ -_ � � __ _- _- -- _- -_ - _- /� '_ _ � m C=0.22 hrs. (100'OF OVERLAND FLOW AT 2%)TOM RUnOff'Volume Reduction (ft) m Tot-0 TP fxmd Reduction A4+lewd (jbtyr) Total 7N Wail Regimbon Ai�hieved e(lbhr) 13&171 Poert Development Treammm'Volumt 79420 � o Li CD zL__ . |U ) | | | | | | | X^0 \ �� �� � ' — — — � - — — - — -- .� - �� �� � _ _� ~' � _ -_ � � __ _- _- -- _- -_ - _- /� '_ _ � m C=0.22 hrs. (100'OF OVERLAND FLOW AT 2%)TOM RUnOff'Volume Reduction (ft) m Tot-0 TP fxmd Reduction A4+lewd (jbtyr) Total 7N Wail Regimbon Ai�hieved e(lbhr) 13&171 .e .,f 630 620 WtA SCOTT R. COLLINSZ > No. 315791 ELEV. 628.00 SHELF ELEV. 631.00 i 615 10+40 10+50 10+60 10+70 10+80 10+90 11+00 11+10 11+20 11+30 11+40 11+50 11+60 11+70 11+80 11+90 12+00 SCAL.E:: VA "=10' HA"=10' ELEV. 628.00 INV IN. 626.00 ; Z 2 ¢ O w � W >U w W LU w w W LU Ce UJ w Lu > o U o w■ INV OUT. 624.00 z �■ 630 1,464 11466 631 a O O 632 3,827 z 0 o 20,122 3.1 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 m i 1 NOTES: ■ .f 1. INTERIOR WET POND ;■ 0 O O O U Q 12+10 12+20 12+30 12+40 12+50 12+60 LEVEL II VI/ET POND 'A' Volume (cf) 12+70 12+80 12+90 13+00 13+10 13+20 13+30 13+40 13+50 w 1 �' ! z �j w � W >U w W LU w w W LU Ce UJ w Lu > o U o 686 416 630 1,464 11466 631 2,514 3,432 632 3,827 0 632.4 20,122 3.1 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 m i 1 NOTES: ■ .f 1. INTERIOR WET POND ;■ o GRADING SHALL BE AT 4:1 r Cn SLOPE OR FLATTER BELOW o . _ ELEVATION 632. ABOVE ° x� I' z ELEVATION 632 THE WET ., ■ Uj T -f -i e POND SHALL FUNCTION FOR E WATER DETENTION ONLY � _--______�------- kD ° AND 3:1 SLOPES SHALL BE cLLJ o UTILIZED. _ 2. THE WET POND SHALL BE ■ AERATED WITH AN ■ VDOT STD. EW -1 ' I APPROVED POND DIFFUSER _ ____ VDOT STD. EC -1 CL. Al o !j / KASCO MARINE OR IPRAP WIG OTEXTILE UNDERLAYMENT E R �=10'; W2 18 D-1.4' C a y l EQUIVALENT), _.. W1_=8; ( IMEN= CY5 s o 0 13+60 13+70 113+80 13+90 14+00 14+10 14+20 14+30 14+40 14+5;"qt: i t'I ■ SCALE: I- _ -- cz j E ' V:1 "=10' ' < a L I ' WET POND LEVEL II'A' DESIGN & REQUIREMENTS:W� H:1"=10' __j o 0') D u) C\I Treatment Volume, Tv from VRRM 41,690 cf W� Required Minimum Treatment Volume = 1.5*Tv 62,535 cf Q ° �t Provided Total Treatment Volume 62,535 cf Tv Requiremeint Met ✓ > Treatment Volume Provided at MWSE 33,357 cf Treatment Volume Provided above MWSE 29,178 cf Minimum Percentage of Tv Allowed at MWSE 50 % - 0 Percentage of Tv Provided at MWSE 53 % `j J Ponding Depth Corresponding to Minimum Tv 1.4 ft LU Q Maximum Ponding Depth allowed for Minimum Tv 4 ft 1-� 1-- ° Maximum Percentage of Tv Allowed above MWSE 50 % L9 W T 0 Percentage of Tv Provided above MWSE 47% 3 rr Minimum Forebay Volume Required (15% of Tv) 6,254 cf Wet ED and Multi Cell Design ✓ Notes: ��-- U Forebay Volume Provided 6,579 cf 1 A min. forebay volume depth of 4' with an aquatic bench 4' wide' 1' deep provided. Minimum Upper Wetland Shelf Area (10% of Pond Area) 1,350 sf 2 A minimum forebay volume of 15% of the total Tv has been provided. Upper Wetland Shelf Provided 2,908 sf Wetlands > 10% of Pond Area ✓' 3 A wetland maximum treatment volume depth of 12" has been provided. *+ j 4 A 10' wide aquatic bench at 12" in depth has been provided. o Jf Length/Width Ratio or Flow Path >= 3:1 (Path=368/120) 3.1 Flow Path >_ :1 V0 5 An 8'wide safety bench with a maximum 5% slope has been provided. Lij r Shortest Flow Path/Overall length >= 0.8 (Path=130j120) 1.1 Shortest Flow Path >= 0.8 ,f' 6 The minimum treatment: volume required has been provided. I- U < E Landscaping (this Sheet) and Aeration to be Provided YES Landscaping/Aeration o jSTORMWATER W z MANAGEMENT FACILITY GRADING (AS SHOWN) < z Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 626 0 0 628 195 0 629 686 416 630 1,464 11466 631 2,514 3,432 632 3,827 6,579 632.4 20,122 40,037 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 Elevation (ft) Area of Wetland Cell Contours (sf) Volume (cf) 626 0 0 628 0 0 629 0 0 630 0 0 6:31 1713 0 6132 2908 2,284 632.4 20,122 40,037 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 Elevation (ft) Area of Main Cell Contours (sf) Volume (cf) 626 1409 0 628 3,497 4,750 629 4,762 8,864 630 6,141 14,301 631 7,644 21,179 632 10,589 30,256 632.4 20,122 40,037 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 Elevation (ft) Wetland + Main Cell Contours (sf) Volume (cf) 626 1409 0 628 3,497 4,750 629 4,762 8,864 630 6,141 14,301 631 9,357 21,993 632 13,497 33,357 632.4 20,122 40,037 634 24,142 75,400 636 28,144 127,635 638 32,372 188,101 640 36,827 257,252 641.5 40,316 315,090 L j P-'1 z z � z u� LLI < o # -0 3: o Lij CCU. n. Ir ,r O IL.13.. 0 011) U X C)0 C\j v s 0 L a SUMMARY OF DESIGN IMPERVIOUS AREAS JOB N0. ° ii7ncc 12 INV IN645.80 RIPRAPI W/GEOTEXTILE UNDERLAYMENT ; > 0 L=30" W1 =8'; W2= I 8`�, D= 1,4' ----------- INV OUT 645.50 W ------------------------------------- ---------------------------------- -------------------------- J, C/) ------ I ---------- 7- ---------- ... WKA FACILITY #213 S WET POND LEVEL 11 (I.5Tv) 30" RCP Ill BARREL L=131.08'; S=2.06% ... SCALE:, 1.11=;:20! INV IN 648-60 \ \ \ \ 0 INV OUT 645.90 C) B 2+80 12+130 13+00 13+10 13+20 13+30 13+40 13+50 13+60 13+70 13+80 13+90 14+00 14+10 14+20 14+30 14+40 14+50 14+60 14+70 14+80 14+90 15+00 0 SCALE: \ . -FUTU,V:V=10' .... ct Ln Ln Ln _0 %0 to %0 FUTURELOTS, iz: E. . . . . . . . . . . WET POND LEVEL ll'B'DESIGN & REQUIREMENTS: 04 M Treatment Volume, Tv (VRRM) _35,249 cf: . .. . . . 4 - Minimum Treatment Volume Required 1.5Tv (VRRM) _52,874 cf jProvided Total Treatment Volume 5-2,874 cf Tv Requirement Met t 27 CF 3 Treatment Volume Provided at MWSE 2 0,020 cf L9 Treatment Volume Provided above MWSE 22,854 cf X > Minimum Percentage of Tv Allowed at MWSE 50 % Percentage of Tv Provided at MWSE 57 % Cy') Ponding Depth Corresponding to Minimum Tv Required 1. .3 ft Maximum Ponding Depth allowed for Minimum Tv 4 ft -------- ... .-, X CY5 OSE RI Maximum Percentage of Tv Allowed above MWSE 50% Z 00 DI SH T C� 0 Percentage of Tv Provided above MWSE 43 % lqj- 0 :3 AW n C0 > _ZZ Minimum Forebay Volume Required (15% of Tv) 5,287 cf Wet ED and Multi Cell Design i/ Notes: < Forebay Volume Provided 5,402 cf I A min. forebay volume depth of 4' with an aquatic bench 4' wide, 1' deep provided. ------ ------ C\1 Z C) - --- - - - - - - - - - - - Minimum Upper Wetland Shelf Area (10% of Pond Area 1,169 sf 2 A minimum forebay volume of 15% of the total Tv has been provided. kl 1,528 sf Wetlands > 10% of Pond Area V 3 A wetland maximum treatment volume depth of 12" has been provided. D Upper Wetland Shelf Provided 4 A 10' wide aquatic bench at 12" in depth has been provided. 0 C\j . . . . . . . . . . OT R T Length/Width Ratio or Flow Path >= 3:1 (Path=200/65) 3:1 Flow Path >= 3:1 V 5 An 8'wide safety bench with a maximum 5% slope has been provided. . . . . "PAP L RIP IDE OREBAY S FETY BEN H W1 < C < Shortest Flow Path/Overall length >= 0.8 (130'/155) 0.8 Shortest Flow Path >= 0.8 V 6 The minimum treatment volume required has been provided. 'RAPACkSHE T > -SEEG, W/A MAXMIMUM 2'DEPTH Landscaping (this Sheet) and Aeration to be Provided YES Landscaping/Aeration V, 0 TARTI AT 654 ------ AV L Ld CL 06 SH )C-K -_D �3 - 5 EAh I HEN E101ERGENCY {MAXI idea=, _j STORMWATER MANAGEMENT FACILITY GRADING (AS SHOWN) Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 648 1,673 0 649 51 0 U) Lu En 0 0 0 0 1,956 Ce 654 0 5,402 654.4 656 Ce LU 658 J-4 CF a- CL a_ a_ Uj ca 0 TOTAL U) Z n n a 0 a_ _j < > all Uj Uj ul LU a LU 0� Uj 0� V) 5 U) 2 V) 5 Ln Uj .2 a. - 0 p1do U3 cj�_ 0� LLJ 0� E :3 ED -�; INV IN645.80 RIPRAPI W/GEOTEXTILE UNDERLAYMENT ; > 0 L=30" W1 =8'; W2= I 8`�, D= 1,4' ----------- INV OUT 645.50 W ------------------------------------- ---------------------------------- -------------------------- J, C/) ------ I ---------- 7- ---------- ... WKA FACILITY #213 S WET POND LEVEL 11 (I.5Tv) 30" RCP Ill BARREL L=131.08'; S=2.06% ... SCALE:, 1.11=;:20! INV IN 648-60 \ \ \ \ 0 INV OUT 645.90 C) B 2+80 12+130 13+00 13+10 13+20 13+30 13+40 13+50 13+60 13+70 13+80 13+90 14+00 14+10 14+20 14+30 14+40 14+50 14+60 14+70 14+80 14+90 15+00 0 SCALE: \ . -FUTU,V:V=10' .... ct Ln Ln Ln _0 %0 to %0 FUTURELOTS, iz: E. . . . . . . . . . . WET POND LEVEL ll'B'DESIGN & REQUIREMENTS: 04 M Treatment Volume, Tv (VRRM) _35,249 cf: . .. . . . 4 - Minimum Treatment Volume Required 1.5Tv (VRRM) _52,874 cf jProvided Total Treatment Volume 5-2,874 cf Tv Requirement Met t 27 CF 3 Treatment Volume Provided at MWSE 2 0,020 cf L9 Treatment Volume Provided above MWSE 22,854 cf X > Minimum Percentage of Tv Allowed at MWSE 50 % Percentage of Tv Provided at MWSE 57 % Cy') Ponding Depth Corresponding to Minimum Tv Required 1. .3 ft Maximum Ponding Depth allowed for Minimum Tv 4 ft -------- ... .-, X CY5 OSE RI Maximum Percentage of Tv Allowed above MWSE 50% Z 00 DI SH T C� 0 Percentage of Tv Provided above MWSE 43 % lqj- 0 :3 AW n C0 > _ZZ Minimum Forebay Volume Required (15% of Tv) 5,287 cf Wet ED and Multi Cell Design i/ Notes: < Forebay Volume Provided 5,402 cf I A min. forebay volume depth of 4' with an aquatic bench 4' wide, 1' deep provided. ------ ------ C\1 Z C) - --- - - - - - - - - - - - Minimum Upper Wetland Shelf Area (10% of Pond Area 1,169 sf 2 A minimum forebay volume of 15% of the total Tv has been provided. kl 1,528 sf Wetlands > 10% of Pond Area V 3 A wetland maximum treatment volume depth of 12" has been provided. D Upper Wetland Shelf Provided 4 A 10' wide aquatic bench at 12" in depth has been provided. 0 C\j . . . . . . . . . . OT R T Length/Width Ratio or Flow Path >= 3:1 (Path=200/65) 3:1 Flow Path >= 3:1 V 5 An 8'wide safety bench with a maximum 5% slope has been provided. . . . . "PAP L RIP IDE OREBAY S FETY BEN H W1 < C < Shortest Flow Path/Overall length >= 0.8 (130'/155) 0.8 Shortest Flow Path >= 0.8 V 6 The minimum treatment volume required has been provided. 'RAPACkSHE T > -SEEG, W/A MAXMIMUM 2'DEPTH Landscaping (this Sheet) and Aeration to be Provided YES Landscaping/Aeration V, 0 TARTI AT 654 ------ AV L Ld CL 06 SH )C-K -_D �3 - 5 EAh I HEN E101ERGENCY {MAXI idea=, _j STORMWATER MANAGEMENT FACILITY GRADING (AS SHOWN) Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 648 1,673 0 649 51 0 650 301 159 652 1,201 1,561 653 1,956 3,124 654 2,615 5,402 654.4 656 Cephalanthus occidentalis 658 CF 660 1 27 243 662 6,507; Elevation (ft) Area of Wetland Cell Contours (sf) Volume (cf) 648 1,673 0 649 2,446 2,047 650 3,361 4,939 652 5,618 13,822 653 659 0 654 1528 1,063 654.4 656 Cephalanthus occidentalis 658 CF 660 1 27 243 662 6,507; Elevation (ft) Area of Main Cell Contours (sf) Volume (cf) 648 1,673 0 649 2,446 2,047 650 3,361 4,939 652 5,618 13,822 653 6,982 20,109 654 10,163 28,632 654.4 656 Cephalanthus occidentalis 658 CF 660 1 27 243 662 6,507; 0F1L_L_VVt-XT VV1 I r1t,)_ I -Aur - > Elevation We T U SLOPES AT EL 660 MEN= . . . . . . . . . .. . . . . . . . . . . Contours (sf) (cf) Eleva Wetland + Main Cell Volume 60.25' 6 LU t) 1,673 0 o 648 0, - -1.1 . . . . . . . . . . . •4, A 0 649 2,446 2,047 - -------- L9 650 3,361 4,939 - B WET POND 0 652 5,618 13,822 Z LEVEL 11 Z VA11NEL4 Z 1000WM4 < 653 7,641 20,425 _ry 11,691 NOTES: 0 654 30,020 14, Z V I 654.4 17,012 35,727 1. INTERIOR WET POND GRADING ir 0% 656 19,772 65,127 4, V j .... SHALL BE AT 4:1 SLOPE OR VIRO TiN G "ID 660 27,037 158,423 . . . . . . . C: ryo > F I]\/Ai LE UUH I AIN 658 23,291 108,142 . . . FLATTER BELOW ELEVATION 654. 0 Uj N_ C3 662 31,008 216,423 ABOVE ELEVATION 654 THE WET (D E A POND SHALL FUNCTION FOR A AND 3:1 CO Z WATER DETENTION ONLY, j Ll -_ r11- < C, W 08EP hi Uj Z SUMMARY OF DESIGN IMPERVIOUS AREAS SLOPES SHALL BE UTILIZED. to tic Foothill Crossing 11 Impervious Areas Draining to Wet Pond'B' ,,,-2. THE WET POND SHALL BE Q U-1 6.43 ac Cc Lj Impervious (Onsite) TY ENCH AT AERATED WITH AN APPROVED Cn Existing Impervious (Offsite) 0.17 ac tow Lu :3 POND DIFFUSER (KASCO MARINE + + C/) 0 Z Pond MWSE Area 0.27 ac < 0 Subtotal 6.87 ac ♦OR EQUIVALENT), Excess Capacity for 1.52 ac. Impervious Area 1.52 ac 1-- 0> Lij Subtotal 1.52 ac Total = 8.39 ac Cc 2 Cc rr 30" 5tP Ill BARREL .79% --- ---- k-, - - - / - I - - - -- ­ 1 -1- --- i 1 j== ---- -------------- - ------- < (D 0 RCP I I BARREL L=31.89'; S=O 30" !PROPOSED 48" RISER I L X IN AT ELEV. 659.0 C) _64&-.8-G--- 30" RCP Ill- BARREL L=64.56" S=0.50% 12 BNI-J VDOT STD. EC -1 CL. X1 INV IN. 653.00 1 - OUT. 645.50 4" MID -FLOW ORIFICE AT 658.0 -RIPRAP W/GEOFABRIC L=131.0$ '; S=2.06% - Vo - INV IN. 648.60 652.67 1-3" LOW -FLOW ORIFICE AT 654.0 UNDERLAYMENT INV OUT. 645.90 INVERTED PIPE ORIFICE AT 653.0 �L=30'; W1 =8'; 'Plant Leepi. Scientific Name Common Name Size Symbol 10 -YR CANOPY: Total Quantity I Canopy TREES Betula Nigra. River Birch Carya cordinformis Bitternut Hickory Shrubs 1 U-12' ht BN 397 12 4,764 21 /2" min. BH 250 6 1,500 Cephalanthus occidentalis Buttonbush CF 9 1 27 243 6,507; TOTAL JOB NO.• 112066 It'r t ":-e! , M A IV ro 1*0 M x Dime In Ln r1J 24 .3 0- 48 58 i4 t 27 33 !112 Bo 72 zi-, 2 30 ur 00 72 �r IT 24,26 30 F Pipe outlet 80 72 4-,A 2:�1 4.2 $1 BLANKET DRAIN go 66 Ile 4 M 5a FL4 4, 1770 W .1 4,21 54 66 54 1W 70 4.20 W4, ';� 4fi 114, 76 g 5Aa 66 w 6 1;14 Wit. tri 12 liff 116 6 1 2A YJ 151.118 z0 0 1,21� 147 IW 1 �2 8297 �W I WD 126 147 IAP4 S-140 A IV ro 1*0 M x (D In Ln r1J J Lr) T-4 6 r\J X > All -2 cli 4" 11MIR= material $0 r orock 0 TYPICAL HOMOGENEOUS JJ EMBANKMENT Q) le, �r IT c, ock or gravel F Pipe outlet Courngr C wlmma Perforated collector aroun s o s Foundation drain Frqff 4 i� ( 3 PW- FOUNDATION DRAIN Ca --tin Top -Shb (T.) Ari0late-ty, ej>4, at—g f;sow',14 h ifWJJr.4o if', W-Oxdarve 4d1h AJi C4728 - 4. to tq(ttds*0 TM C 4*7& of AS Waimea (A -ma teen ji*ni Le 1 D ttd t tI 0 J ii""I f 1SW reft,40""0A to WA4TM AOT5 r E.VL CIrizur; *mnfb1,m*4vmeme# b i*.AW i* 01% 2x S W Z.A- x W2. S WM Foki umm. low 4*�tfwwwwl I C ri M4 I Un L -al- n,-"ftd. %-1 %QNlo EA )w-,af*h14Sx 4e,LZ- risam arA'Wx;Ar. III! i 119111i1! =7;M I i Al dVW9kx0 MAK-1 izz, gv#Wt, Technical Bulletin 7 Minimum Standard 3.02 -Ope - oulvvrL VDOT A& EW -1 5/5" din. hate L- — — — alusla pup,--` arift& 01 4' 0 14 ik Isometric L/8" aline plated hqok attLohrd with Va* fastener 0-11tr &&, 2101= 1/4' HDPE plate IL '4 AFE strvctural lAostip "with 4-2/0" 601*4� Otm;f 114' ptau 0 manufateturod >sy Pleads 0 0 (DS01vtJInn- or equal[ 000 )o ow 0000 0 j, thaft" Vith art63nea Plata EleveLtic)n EMPS atructuml Plastic with 2 LvIrz And 1;4; lata I Sir L11111111c-tured. by 301'AdQ11V Inc,, 9T ';we) VDOT aid, NW -1 20 "bW ftad PL -0, Jim OW Tkubega A =004 INC. Floating Baffles: Custom designed and engineered. Thermal sealed or sewn, if required. Floating or stispe-nded, N.1-35. approved fabric. S.S. hardware. Designed to adjuatto changing fluid An optional spine can increase fTeeboard. and a cable can be run through the. gromm-ets. Flotation is provided by closed cell logs which are seated into the floating chambers. da les are built in sections, of .various len the and are joined by non -corrosive hardware.. The modular design permits, the Baffle to be shipped to the job site finished. All that is required is fastening together and floating into position. If a section is daLn'Vq ged, it can be easily replaced. FIGURE 3.01 - I a Homogeiiet)as Embankments wlSeepage (.t)ntr01,5 Source: SCS Eligineering, 101 - 3 TH o C", SCOTT COLLINSZ' 0 U No. 35791 -tO]VAL LU z UJ Cn -J 0 (D In Ln r1J omogeneous fill Lr) T-4 6 r\J C min -2 cli off trench -4' below suitable, 11MIR= material $0 r orock 0 TYPICAL HOMOGENEOUS EMBANKMENT Q) Tromition fill ock or gravel F Pipe outlet Courngr > U) Perforated collector aroun s o s Foundation drain Blanket drain FOUNDATION DRAIN BLANKET DRAIN Chimneydrain -MA- z Sand, grave! or mck ;;Z1 din Jit z Rock or gravel W toe drain 1\�ffrunsirion filter Transition filter CWIMNEY DRAIN TOE DRAIN C: \301-1a • Source: SCS Eligineering, 101 - 3 TH o C", SCOTT COLLINSZ' 0 U No. 35791 -tO]VAL LU z UJ Cn -J 0 -0 0 (I 0 t II I I I 1 0 1 1 1 LIJ (D In Ln r1J Lr) -q In rq Lr) T-4 6 r\J C "D -2 cli CN 11MIR= 0 Q) —J > U) 101 z z z ;;Z1 z —J W • U W F• — D • Ul 0 Q) z0 0 W 0 0 0 -C U U U U 0 '2,� —Z ct - 0 U co W =) UJ M 00 U U 0 U 0 0 < n� q• CL ce 0F- LU qJ UJ Ili U, Q0 z Ci- CL C.L t3- CL > W LU LU .0 > > > > > LU LU LU W Lu 0 0 O -0 0 (I 0 t II I I I 1 0 1 1 1 LIJ (D In Ln r1J Lr) -q In rq Lr) T-4 6 r\J C "D -2 cli CN 11MIR= 0 W —J W (D > (1) C 00 -2 cli CN 11MIR= 0 W —J W • 0) CN 0 0 W CN > W —J > U) 101 F- 0 z —J W • W F• — D • Ul W W LLI ct (D 0 0 N 11IM11111111111 JOB NO. 112066 7 A 1 1;R GENERAL NOT -E'S EROSION CONTROL NOTES 1. THE OWNER/CLIENT OF THIS PROPERTY IS: ES --1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION ROUTE 240 HOLDINGS, LLC AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND P.O. BOX 1467 S MAINTAINED TO TAGNED ACCORDING MINIMUM STANDARDS AND SPECIFICATIONS E(FICATIONS OF CHARLOT7TESWLLE, VA 22902 THE WRIGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA 2. THE DEVELOPER OF THIS PROPERTY IS. REGULA TIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL RIVERBEND DEVELOPMENT, INC. REGULA TIONS. 455 SECOND STREET SE, SUITE 400 ES --2: THE PL14N APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO CHARLOTTE=SVILLE, VA 22902 THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE ATTN. ALAN TAYLOR COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO J. THESE PLANS HAVE BEEN PREPARED BY' THE FINIAL INSPECTION. COLLINS ENGINEERING, INC ES --3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR 200 GARRETT STREET, SUITE K TO OR AS THE FIRST STEP IN CLEARING. CHARLOTTESVILLE, VA 22902 ES --4.A COPY' OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL TELEPHONE. (434) 293-3719 FACSIMILE: (434) 293-2813 BE MAINTAINED ON THE SITE AT ALL TIMES. 4. SOURCE OF TOPO & SURVEY TOPOGRAPHY PROVIDED BY A COMBINATION OF ES--5:PRIOR YO COMMENCING LAND DISTURBING AC77VITIES IN AREAS OTHER THAN ROUDABUSH, GALE AND ASSOCIATES AND LOUISA AERIAL SURVEYS INC., JANUARY IND1CA7rED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF-SITE 20OZ THE BOUNDARY LINE INFORMATION IS PROVIDED BY ROUDABUSH, GALE, AND BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A ASSOCIATES. INFORMA77ON FIELD VERIFIED BY COLLINS ENGINEERING MAY 2014. SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND 5. ZONING: R-6 RESIDENTIAL (05600-00-00-05700) APPROMAL BY THE PLAN APPROVING AUTHORITY R-2 RESIDENTIAL (056A2-01-00-06200) ES --6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL 6. TAX MAP PARCEL NUMBER: EROSIOIN CONTROL MEASURES NECESSARY TO PREVENT EROSION AND ,AND 05600-00-00-05700 (D.B. 2478, PG. 251) SEDIMEIIVTAT70N AS DETERMINED BY THE PLAN APPROVING AUTHORITY 056A2-01-00-06200 (D.B. 2525, PG. 75) ES--7•ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL 056A2-01-00-06100 (PORTION) MEASURES AT ALL 77MES DURING LAND DISTURBING AC17WTIES AND DURING 7. USGS DATUM: NAD 83 SITE DEVELOPMENT UN77L FINAL STABILIZA77ON /S ACHIEVED. 8. LOCA770NIIADDRESS OF PROJECT- BETWEEN EAST TERMINUS OF HILL TOP S7REET, ES --8: DURING' DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN AND WEST TERMINUS PARK RIDGE DRIVE, ADJJ, FOOTHILL CROSSING /N CROZET, VA APPRO E•D WATER FILTERING DEVICE ES -9: THE' CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES 9. PROJECT AREA: 14.61 AC (05600-00-00-05700 R-6 PORTION) PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. 213 AC _(056A2-01-00-06200 ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS 16.74 AC. OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. SITE PHASING: MINIMUM ONE PHASE 11. PUBLIC U77LIRES• CONNECT TO EXIS77NG PUBLIC SEWER AND WATER EROSION CONTROL NOTES * COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK, 1. 771E PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO THE SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND REGULATIONS PRE-CONS77RUC7ION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY CONSTRUC77ON STARTED PRIOR TO DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. PLAN APPROVAL. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE VIRGINIA EROSION AND �y r �-a �r �j p� /� �+ �^� SEDIMENT EROSION & D M.Lrj NT SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA77ONS VR 625-02-00 EROSION AND t..7 Lj �r SYETROL SEDIMENT CONTROL REGULATIONS. ,/E� �+7 T�E�+� MEASURES: J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 1V1 iJ Ld t.7 774E FIRST STEP IN CLEARING. STRUCTURAL ,EROSION AND SEDIMENT CON7ROL PRAC77CES SHALL BE IN ACCORDANCE 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL MAINTAINED ON THE 517E AT ALL TIMES PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING- 5. PRIOR TO C±OMMENC/NG LAND DISTURBING AC7714T7ES /N AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE- BORROW OR WASTE 3.01 SAFETY FENCE. E AREAS), THCONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO A PROTEC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. 771E OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. TO PROHIBIT 777E UNDESIRABLE USE OF AN EROSION CON7ROL MEASURE BY THE PUBLIC. 6. 771E CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADD177ONAL EROSION APPLICABLE TCI ANY CONTROL MEASURE OR SERIES OF MEASURES' WHICH CAN BE CONSIDERED CONTROL. MEEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA77ON AS UNSAFE BY WRT7UE OF P07EN77AL ACCESS BY THE PUBLIC. DETERMINED) BY THE PLAN APPROVING AUTHORITY. Z ALL DIS77JRiBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT 3.02 CONS77?UCTION ENTRANCE, ALL 77MES IDURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UN77L A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF FINAL STABIILIZA77ON IS ACHIEVED. VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION 5/7E. TO REDUCE 774E AMOUNT OF 8. DURING DENVA7ERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTER/NG MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF CONSTRUC77ON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE DEVICE. 9. 771E CONTRACTOR SHALL INSPECT ALL EROSION CON7ROL MEASURES PERIODICALLY AND AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. AFTER EAC11•1 RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE 1MMUDIATEL Y. 305 SILT FENCE: A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHE 77C FILTER FABRIC STRETCHED 10 ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNA7ED BORROW AREA. ACROSS AND ATTACHED TO SUPPORTING POSTS AND EN77RENCHED, TO INTERCEPT AND DETAIN 11- ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERA77ONS IN SHALL BE IINERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND 07HER ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-TO-MODERA7F LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS DEBRIS 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WTHIN 7 DAYS OF COMPLETION PER SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT ZONING ORDINANCE SEC77ON 51.28. 13 ALL INERT MATERIALS SHALL BE TRANSPORTED /N COMPLIANCE K17H SECTION 13-301 OF LADEN RUNOFF' FROM SHEET FLOW AS INDICATED, THEY SHALL BE INSPECTED IMMEDIATELY 774E CODE OF ALBEMARLE. AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE W7H THE VIRGINIA EROSION & 14. BORROW, FILL OR WASTE ACT7VITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL SEDIMENT CONTROL HANDBOOK (VESCH). BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. 0 15. BORROW, FILL OR WASTE AC77WTY SHALL BE CONDUCTED /N A SAFE MANNER THAN D!?AIN INLET PROTECTION: 3.07 STORM NL T MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, A SEDIMENT F/LIFT EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY INLET OR CURB INLET: TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS B PUBLIC7EDSTREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE. PRIOR TO PERMANENT STABILIZA77ON OF THE DISTURBED AREA. INLET PR07FC77ON APPLIES 16. THE SHALL RESERVE THE RIGHT INSTALL, MANTA/N, REMOVE OR CONVERT WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA77ONAL BE=FORE" PERMANENT A Tt? PERMANIENT STORMWATER MANAGEMENT FAClLIT7ES WHERE APPLICABLE ALL EROSION ERMAN? NT STABILIZA77ON OF THE CORRESPONDING DISTURBED DRAINAGE AREA. CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER POR77ON OF THE PROPERTY. 3 Q9 TEMPORARY OIVFRSION DIKE: 17. n-MPORARYr' STABILIZA77ON SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING /S TO A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING BE AT 75 ILBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM 50150 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR /N MARCH AND APRIL TO UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH STRAY✓ MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORY WATER RUNOFF MUST BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON 18. PERMANENT STABlL1ZA770N SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND S17E DURING CONS7RUCT70N. THESE S7RUCTURES GENERALLY HAi1E A LIFE EXPECTANCY OF 18 MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 9OLBS 1OOOSF, MONTHS OR LESS, WHICH CAN BE PROLONGED KITH PROPER MAINTENANCE. INCORPORAiTED INTO THE TOP 4-6 INCHES OF SOIL. FER77LIZER SHALL BE APPLIED AT 3.14 TEMPORARY SEDIMENT BASIN: 100OLBS%AtCRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWA7E'R RELEASE S7RUC7URE BE APPLIED AT 180LBS/ACRE AND CONSIST OF 959 KENTUCKY 31 OR TALL FESCUE AND FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. 0-59° PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS STRAW MULCH IS TO BE APPLIED TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE AT 80LBS/'1OOSF ALTERNA77VE'S ARE SUBJECT TO APPROVED BY THE COUNTY EROSION LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE' OUT: APPLIES BELOW CONTROL INVSPECTOR. DISTURBED AREAS WHERE THE TOTAL CON7RIBUTING DRAINAGE AREA IS EQUAL TO OR 19. MAINTENANICE.• ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE RAINFALL. ,ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR TOPOGRAPHY FOR THE CONS7RUC77ON OF A TEMPORARY IMPOUNDMENT. IMMEDIATEL-Y. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME z IS FILLED W11/AH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY 3.18 OUTLET PRO=770N: TO ACHIEVE A GOOD STAND OF GRASS SILT FENCE AND DIVERSION DYKES WHICH ARE STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED COLLEC77NO SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS- TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PR07E-CT THE OUTLET S7RUCTURE, AND TO MIN/M1ZE THE P07EN77AL NUEDIATEL Y. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCEN7RATED W7HIN 30 ,DAYS OF FINAL S17E STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SUBJECT 770 APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. SECTIONS.21. 77415 PLAN SHALL BE VOID IF 7HE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF mE DATE i OF APPROVAL. (WATER PR07EC77ON ORDINANCE SEC77ON 17-204G.) 3.19 RIPRAP: 22- PERMANENT VEGETA77ON SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) A PERMANENT EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE K17H MONTHS AIFTER THE DATE THE LAND DISTURBING AC77WTY COMMENCED. (WATER FILTER FABRIC OR GRANULAR UNDERLINING TO PR07ECT THE SOIL FROM THE EROSIVE PROTECTION ORDINANCE SEC77ON 17-207B) TY tD RUNOFF WHILE CONCP07EN77AL FORCES OF TED RUNOFF, SLOW THEENHANCING �WITH S O j'L ILS ! D T T�ITIO A T THE FOR INFIL TRA RON, ANDL�OI STABIL 2(E- SLOPES SEEPA PROBLEMS, AND,/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND 5B -� BEL Vo,�1/R'LLOAMtJ-129�1T10�79 SLOPES. S. SOIL IS SOMEWHAT POORLY DRAINED, M THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA77VE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. WITH 12' TO INCHES TO THE WATER TABLE MADE FROM RESIDUUM WEA TH RED FROM GRANT TE AND GNEISS, THIS SOIL HAS CONCA VE 3.31 TEMPORARY SEEDING: DOWN-SLOPE AND CONCAVE ACROSS -SLOPE SHAPE. NO FREQUENCY OF THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING PONDING; OR FLOODING, AND MODERATELY LOW TO MODERATELY HIGH WITH APPROPRIATE RAPIDLY GROWrNG ANNUAL PLANTS TO REDUCE EROSION AND KSAT. SEDIMENTA77ON BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND 7B - BRADDO)CK CLAY LOAM -27 TO 77 SLOPES. SOIL /S WELL DRAINED, WITH RUNOFF TO DOWNSTREAM OR OFF-SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS MORE 77HAN 80 INCHES TO THE WATER TABLE. MADE FROM ALLUVIUM EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR 07HER EROSION CONTROL AND COLLUVIUM DERIVED FROM ACID CRYSTALLINE ROCKS, THIS SOIL HAS MEASURES CAN BE ESTABLISHED. CONVEX' DOWN-SLOPE AND LINEAR ACROSS -SLOPE SHAPE. NO FREQUEINCY OF PONDING OR FLOODING, HIGH WATER CAPACITY, AND 3.32 PERMANEIV T STABILIZATION: MODERA� TEL Y HIGH TO HIGH KSA T. THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG rL ' SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO 8C3 - BRADDOCK CLAY LOAM -77 TO 157 SLOPES SOIL /S WELL DRAINED, WITH PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THATIS ECONOMICAL, ADAPTABLE TO MORE )THAN 80 INCHES TO THE WATER TABLE- MADE FROM ALLUVIUM S17E CONDITIONS, AND ALLOWS SELEC77ON OF THE MOST APPROPRIA7E PLANT MATERIALS. TO AND COLLUVIUM DERIVED FROM ACID CRYSTALLINE ROCKS, THIS SOIL HAS IMPROVE WILDLIFE HABITAT TO ENHANCE NATURAL BE-AU7Y. UPON COMPLETION OF CONVEX:' DOWN-SLOPE AND LINEAR ACROSS -SLOPE SHAPE. NO CONSTRUCTION ACT I V777ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. FREQUENCY OF PONDING OR FLOODING, HIGH WATER CAPACITY, AND z MODERATELY HIGH TO HIGH KSAT 3.38 TREE PRESERVATION AND PROTECTION: PR07EC77ON OF DESIRABLE TREES FROM MECHANICAL OR 07HER INJURY DURING LAND 14C - CHESTEIR LOAM -7% TO 159 SLOPES SOIL IS WELL DRAINED, WITH MORE DISTURBING AND CONSTRUCTION AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES THAN 8(0 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED WEATHEIRED FROM GRANITE AND GNEISS, THIS SOIL HAS CONVEX PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLU770AI CONTROL, NOISE REDUCTION, DOWN -_SLOPE AND CONVEX ACROSS -SLOPE SHAPE NO FREQUENCY OF SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM PONDING & OCCASIONAL FREQUENCY OF FLOODING, MODERATE WATER FOREST TO URBAN -TYPE USES. APPLIES /N TREE -INHABITED AREAS SUBJECT TO LAND CAPACIITY, AND MODERATELY HIGH TO HIGH KSAT. DISTURBING AC77077ES 36C - FIAYESVIILLE LOAM -79 TO 157 SLOPES SOIL IS WELL DRAINED, WITH J39 DUST 0_dMOL: MORE TFHAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND WEATHEIRED FROM GRANITE AND GNEISS, THIS SOIL HAS CONVEX CONSTRUCTION AC771477ES TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM DOWN-SLOPE AND CONVEX ACROSS -SLOPE SHAPE. NO FREQUENCY OF EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PONDING OR FLOODING, HIGH WATER CAPACITY, AND MODERATELY HIGH PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. TO HIGM KSAT. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND ALR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WTH THE 37C3 - HAYESWILLE CLAY LOAM -77 TO 159 SLOPES SOIL IS WELL DRAINED, VESCH. WITH MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM SEDIMENT BASIN BAFFLE DETAIL RESIDUUM WEATHERED FROM GRANITE AND GNEISS, THIS SOIL HAS NO SCALE CONVEX; DOWN-SLOPE AND CONVEX ACROSS -SLOPE SHAPE. NO LU FREQUEINCY OF PONDING OR FLOODING, HIGH WA TER CAPACI TY, AND SHEETS OF 4'x&it�' ExTERIOR MODERATELY HIGH TO HIGH KSAT. PLYWl10© OR EQUIVALENT 6. �. 81B - THURMO)NT LOAM 27 TO 77 SLOPES SOIL IS WELL DRAINED WITH MORE -RISER CREST ELEVAn°N THAN 810 IN. DEPTH TO THE WATER TABLE. MADE FROM COLLUVIUM DERIVED FROM GRANITE, GRANOD10RITE, AND GRAN17F GNEISS, THIS SOIL POSTS MIN. SIZE 4* SQUARE HAS CONVEX DOWN AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO OR 5* ROUND. SET AT FREQUENCY OF PONDING OR FLOODING ANDA MODERA m Y HIGH TO HIGH a,o HI LEAST 3' INTO 7HE GROUND KSAT W/1 TH MODERATE WATER CAPACITY. DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES•I IT IS AN TI CIPA TED THA T A CONSTRUCTION ENI TRANCE, TEMPORARY DIVERSION BERMS, RIGHT OF WAY DIVERSION, SEDIMENT BASINS, OUTLET PROTECTION, INLET PROTECTION, AND SILT FENCE WILL BE INSTAILLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREA=S WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACT11VI77ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELE(CRON OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TE=MPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICHI WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE, SEEDED WITH FAST GERMINATING VEGETA77ON IMMEDIA TEL Y FOLLOWING GRADING OF THOSE AREAS. SELECT70N OF SEED MIXTURE WILL DEPEND ON THE 77ME OFF- YEAR APPLIED. 3.01 SAFETY FENCE - SAFETY FENCE WILL B?E INSTALLED AROUND ALL PROPOSED SEDIMENT BASINS 3.02 CONS7RUC770N ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT PARK RIDGE DRIVE THIS WILL BE THE ONLY POINT OF INGRESS AND EGRESS TO THE SITE CARE WILL BE TA,IKEN TO PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT. 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF DISTURBANCE WHERE NOTED ON THE PLANS 3.07 STORM DRAIN INLET PROTECTION- IP WVLL BE INSTALLED ON EACH PROPOSED INLET AS SHOWN ON THE PLANS 3.09 7EMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE PER/METER OF S17E DISTURBANCE WHERE SMOWN ON THE PLANS TO DIRECT RUNOFF TO ON-SITE SEDIMENT CONTROL FA(CILIDES 3.14 TEMPORARY SEDIMENT BASIN- TEMPOR14RY SEDIMENT BASINS WILL BE INSTALLED WHERE SHOWN ON THE PLANS. 318 OUTLET PRO7EC77ON- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE PIPES WHERE SHOWN ON PLANS. 3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE SHOWN ON THE PLANS 331 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.38 TREE PRESERVATION AND PROTEC77ON-- TREE PRESERVA 77ON FENCING SHALL BE INSTALLED WHERE SHOWN ON THEE PLANS. NO TREES SHALL BE HARMED OUTSIDE OF THE LIMITS OF TREE PN07ECTION FENCING. 3.39 DUST CONTROL- DUST CONTROL SHALL'- BE APPLIED THROUGHOUT THE S17E WHERE SHOWN ON 7HE PLANS. STORMWATER MANAGEMENT STORMWATER RUNOFF QUANTITY WILL BE TREATED WITH TWO LEVEL ll WET PONDS SEE STORMWATER MANAGEMENT PLAIN SHEETS MAINTENANCE. IN GENERAL, DURING CONSTRUCTION THE RL,D OR CONTRACTOR ON-SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL, MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO 774E FOLLOWING ITEMS: a. SEDIMENT BASINS WILL BE CLEANED ANLO MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b, ALL INLET PROTEC77ON AND GRAVEL OU I TLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WLI L BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERMLIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON-SITE. THE CONTRACAOR WILL BE DETERMINED AT THE TIME THE CONTRACT IS AWARDED. IN ADDITION THE DOWNER MAY BE CONTACTED, MR. ALAN TAYLOR UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATFRIAkLS "QUICK. REFERENCE FOR ALL REGIONS' .... .. . �i 1 Rate _ I I it I I 1 11 I 11 4' 1 11 1 1 1 -RISER CREST ELEVAn°N THAN 810 IN. DEPTH TO THE WATER TABLE. MADE FROM COLLUVIUM DERIVED FROM GRANITE, GRANOD10RITE, AND GRAN17F GNEISS, THIS SOIL POSTS MIN. SIZE 4* SQUARE HAS CONVEX DOWN AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO OR 5* ROUND. SET AT FREQUENCY OF PONDING OR FLOODING ANDA MODERA m Y HIGH TO HIGH a,o HI LEAST 3' INTO 7HE GROUND KSAT W/1 TH MODERATE WATER CAPACITY. DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES•I IT IS AN TI CIPA TED THA T A CONSTRUCTION ENI TRANCE, TEMPORARY DIVERSION BERMS, RIGHT OF WAY DIVERSION, SEDIMENT BASINS, OUTLET PROTECTION, INLET PROTECTION, AND SILT FENCE WILL BE INSTAILLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREA=S WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACT11VI77ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELE(CRON OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TE=MPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICHI WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE, SEEDED WITH FAST GERMINATING VEGETA77ON IMMEDIA TEL Y FOLLOWING GRADING OF THOSE AREAS. SELECT70N OF SEED MIXTURE WILL DEPEND ON THE 77ME OFF- YEAR APPLIED. 3.01 SAFETY FENCE - SAFETY FENCE WILL B?E INSTALLED AROUND ALL PROPOSED SEDIMENT BASINS 3.02 CONS7RUC770N ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT PARK RIDGE DRIVE THIS WILL BE THE ONLY POINT OF INGRESS AND EGRESS TO THE SITE CARE WILL BE TA,IKEN TO PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT. 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF DISTURBANCE WHERE NOTED ON THE PLANS 3.07 STORM DRAIN INLET PROTECTION- IP WVLL BE INSTALLED ON EACH PROPOSED INLET AS SHOWN ON THE PLANS 3.09 7EMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE PER/METER OF S17E DISTURBANCE WHERE SMOWN ON THE PLANS TO DIRECT RUNOFF TO ON-SITE SEDIMENT CONTROL FA(CILIDES 3.14 TEMPORARY SEDIMENT BASIN- TEMPOR14RY SEDIMENT BASINS WILL BE INSTALLED WHERE SHOWN ON THE PLANS. 318 OUTLET PRO7EC77ON- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE PIPES WHERE SHOWN ON PLANS. 3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE SHOWN ON THE PLANS 331 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.38 TREE PRESERVATION AND PROTEC77ON-- TREE PRESERVA 77ON FENCING SHALL BE INSTALLED WHERE SHOWN ON THEE PLANS. NO TREES SHALL BE HARMED OUTSIDE OF THE LIMITS OF TREE PN07ECTION FENCING. 3.39 DUST CONTROL- DUST CONTROL SHALL'- BE APPLIED THROUGHOUT THE S17E WHERE SHOWN ON 7HE PLANS. STORMWATER MANAGEMENT STORMWATER RUNOFF QUANTITY WILL BE TREATED WITH TWO LEVEL ll WET PONDS SEE STORMWATER MANAGEMENT PLAIN SHEETS MAINTENANCE. IN GENERAL, DURING CONSTRUCTION THE RL,D OR CONTRACTOR ON-SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL, MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO 774E FOLLOWING ITEMS: a. SEDIMENT BASINS WILL BE CLEANED ANLO MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b, ALL INLET PROTEC77ON AND GRAVEL OU I TLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WLI L BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERMLIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON-SITE. THE CONTRACAOR WILL BE DETERMINED AT THE TIME THE CONTRACT IS AWARDED. IN ADDITION THE DOWNER MAY BE CONTACTED, MR. ALAN TAYLOR UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATFRIAkLS "QUICK. REFERENCE FOR ALL REGIONS' (Setaria italica Source: Va. DSWC .... .. . �i 1 Rate Pian ing Dates Specie lflbs. acre Sept. 1 - Feb. 15 50150 Mix of Water Application Annual Ryegrass Dilution Type of Rate Adbnilm (Adhe iiwi. Water) Nyaw fzwku/Acre _ , FA �,�.!i�, (Lolium multi-florum) - ::�--- t _. ,.. & 50 - 100 PROFILE Cereal (Winter) Rye (Secale cereals) v t - -.,____.-1 Feb. 16 - Apr. 30 Annual Ryegrass 60-100 `; `eptwn ieatura .,. ( iium multi-flomm) Acrylic Emulsion May 1 - Aug 31 German Nliilet 50 (Setaria italica Source: Va. DSWC .... .. . �i Paved eomshmetion eetnnce for erosion control pians 1. .1, .. .._ .. ...... .......... ,. -M ri..ici,q ;3* : . f I Water Application Y'li Dilution Type of Rate Adbnilm (Adhe iiwi. Water) Nyaw fzwku/Acre _ , FA �,�.!i�, q��, z - ::�--- t _. ,.. as antpto al feature1. . . Asphalt Emulsion 7:1 Coarse Spray 1,200 PROFILE I t. v t - -.,____.-1 r_.____1j1­V t"."j 'Xrv' - -VL W J-I)i :-.�i"Ta1 t •'��I C VIO. tir�!4,L 1 i !744 pi r A"r, ! ; :,:a,, L.;+' 7 �, aiRnC, f' .., i th:t � 1St w .,''_TUR ,.,_...t:. ...fie. ',;ECTION A -A A ni 4dwtutt wdtef tAp n# 1 Walk tokL4t t>e uoi4e4'Aigt o kitil trttho i igi,, It bAl ock ,A1dkA1A?0hA:41ypty*g,a WMI ba=e with a tInd"Aca Gf-1,5 w0t.;forr asl�untz uwwfani l+rer Uwe. Aya,�lt rir�atcs" nets b,e cathed away Morn 6t, e11hft1Wc t,b ori P,I o ed. - oddiag at'rrt to rarwv _,it(htuinut, U aetlanrrrnt aiud the prswl ented horror tutcnag gtolut (h*u, at*a or watacowa", PI�VEO VVAS�# SACK s tk"r. PURPOSE.' THE PURPOSE OF THIS LAND -DISTURBING ACTIVITY IS TO CREATE THE ROADWAI Y AND LOTS FOR THE FOOTHILL CROSSING 11 SUBDIVISION. THE TOTAL ACREAGE TO BE DISTURBED WITH THIS PLAN IS 30.05 ACRES. EXIS77NG S17E CONDI770NS THE EXISTING S17E /S A VACANT HILLY PARCEL. TWO EXISTING STREAMS RUN NORTH AND SOUTH OF THE SITE THE S17E IS GENERALLY WELL DRAINED WTH ONE SMALL AREA OF MANAGED STEEP SLOPES EROSION AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE EXIIS77NG SITE SLOPE AND PROTECT THE PERIMETER STREAMS AND ADJACENT PROPERTIES. ADJACENT AREAS: THE SITE IS POSITIONED BETWEEN ROUTES 240 AND 250 AND IS NORTHWEST OF THE MASTER PLANNED CROZET CONNECTOR ROAD CORRIDOR. IT IS BORDERED BY ROUTE 240 TO THE NORTH, HILL TOP STREET AND RESIDENCES TO THE WEST, VACANT LAND TO THE SOUTH, AND FOOTHILL CROSSING TO THE EAST OFFSITE LAND DISTURBANCE.• NONE CRI77CAL AREAS: NO PRESERVED STEEP SLOPES TO BE IMPACTED. ONE AREA OF MANAGED STEEP SLOPES TO BE IMPACTED. STREAMS AND BUFFERS TO BE PROTECTED. SOILS: SEE SOILS BOUNDARIES ON THE EROSION AND SEDIMENT CONTROL PLAN PHASE 1 SHEET, AND DESCRIP77ONS ON THIS SHEET. SEQUENCE OF CONS77?UC770N: 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEE77NG AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. J. CONTRACTOR SHALL IDENTIFY THE LIMITS OF DISTURBANCE AND INSTALL )TREE PROTEC77ON FENCING WHERE INDICATED ON THE PLANS BEFORE ANY SITE DISTURBANCE SHALL TAKE PLACE. CONTRACTOR SHALL ENSURE THAT TREES TO BE SAVED ARE FLAGGED ALONG THE LIMITS OF (CLEARING; MITIGATION PLAN77NGS SHALL BE INSTALLED WITHOUT ANY CLEARING OF EXISTING TREES 4. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH RACK AS SHOWN ON THE PLANS CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUC77ON VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPOR7F OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPOR MING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIIMENT IS REMOVED IN THIS MANNER. INSTALL THE WASH RACK UPHILL FROM PROPOSED SEDIMENT BTASIN #2. ACSA WILL DETERMINE THE APPROPRIATE METHOD OF SUPPLY/NG THE WASH RACK. PARKING AND CONSTRUC77ON ENTRANCE AREAS SHALL BE CLEARED OF ALL VEGETA77ON, ROOTS, OR OTHER OBJEC77ONABLE MATERIALS BEFORE CONSTRUCTION ROAD STABILIZATION /S INSTALLED. 5. INSTALL THE INITIAL CONSTRUCTION MEASURES AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHEETS THIS INCLUDES 3 SEDIMENT BASINS, SILT FENCE, AND DIVERSION BERMS SHALL ALSO BE INSTALLED AT THIS TIME. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, BERMS, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACiE. 6. INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN. 7. ONCE ALL THE EROSION CON7ROL 17EMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION CONTROL PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERA77ONS 8. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE EROSION CONTROL PLAN. 9. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W17HIN SEVEN DAYS AFTER FINAL GRADE 15 REACHED ON ANY POR77ON OF THE SITE TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS PERMANIENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 10. INSTALL THE CONSTRUC77ON MEASURES AS SHOWN ON 7HE PHASE H EROSION CONTROL PLAN SHEETS MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A ,FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOIPE LAND DISTURBANCE TAKES PLACE. 11. INSTALL THE U77LITIES, CURB AND GUTTER, AND ROADS. INLET PROTECTION SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED WITH SEDIMENT SO THAT IT NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE PULLED AWAY AND CLEANED AND/OR REPLACED. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN. 12. ONCE PHASE 11 OF CONSTRUCTION IS COMPLETE, THE S17E IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE SEDIMENT BASIN 3 AND INSTALL THE REMAINING EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. 13. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGIMIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 14. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NG LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. SAFETY FENCE PERSPECTIYE VIEW PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE ce: Adapted from Conwed Plastics acid Plate 3.01-1. VDOT Road ane Fir)d£e Standards 11 FENCINC AND ARMORING � 1 Gww FENCE :�I� 00 - �.' :: := CORRECTtt � "2'1_-_ " CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE 1. SET POSTS AND EXCAVAIF A 4X4" 7RENCH UPSLOPE ALONG THE LINE OF POSTS. I,__I%a FLOW FILTER FABRIC ENTRENCHED ti' COMPACTED SOIL � s' VjMn M 7 Till n ! r il- --- --' ` . i 24 ! I r s T A . ..^'`_II__ i14 _ !yF_=j -iI 1- I j!r ]fir t is 1i. 1 1,11,111,1111, ILr1. -,r,! �.t rill ,r-' 1-. '1!r 'T! ., {1 - I `�! 11 1� i l l ir/ i - !- r ,i it '' i :- r"' I I T :L _a - OD TEMPORARY 24" DIVERSION BERM ATTACH FILTER FABRIC TO STAKES OR POSTS & EXTEND IT INTO TRENCH WOODEN STAKE STEEL POST LENGTH = 5' MIM EXCAVATED SOIL BACKFILLED AND COMPACTED 4",4" TRENCH SILT FENCE 0(WI THOUT WIRE SUPPORTI .05- NO SCALE -CURB INLET (z> - - ', , , - y�, -ice ­Cj� =� I , _C_ `" �-CONCRETE BLOCK WIRE SCREEN - � _ GRA VEL # FILTER OR #5 COARSE AGGREGATE. BLOCK & GRA VEL CURB INLET IP SEDIMENT FIL TER 3'07- NO SCALE TOTAL LBS GQ0?AL SLOPE (3.1 OR U= PER KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS, SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. �S PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) Floating Baffle Curtain .... .. . �i TABLE 3..39-A 1. .1, .. .._ d :_. i.: . ADHESIVES USED FOR DUST COMMOL : . f Water Application _.,. #� wzontal searns. p avida stre4h. Dilution Type of Rate Adbnilm (Adhe iiwi. Water) Nyaw fzwku/Acre Anionic ,.. as antpto al feature1. . . Asphalt Emulsion 7:1 Coarse Spray 1,200 " Latex Emulsion 12.5J Fine Spray 235 I are an � I Resin in Water 4:1 Fine Spray 300 `; `eptwn ieatura .,. ­­­, Acrylic Emulsion � 11--1 :. (Non -Traffic) 7:1 Coarse Spray 450 A sea!e 4n t94n to aid in ft ir4WIation. Acrylic Emulsion ' Cul outs in av chain packet (Traffic) 3.5:1 Coarse Spray 350 Source: Va. DSWC SAFETY FENCE PERSPECTIYE VIEW PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE ce: Adapted from Conwed Plastics acid Plate 3.01-1. VDOT Road ane Fir)d£e Standards 11 FENCINC AND ARMORING � 1 Gww FENCE :�I� 00 - �.' :: := CORRECTtt � "2'1_-_ " CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE 1. SET POSTS AND EXCAVAIF A 4X4" 7RENCH UPSLOPE ALONG THE LINE OF POSTS. I,__I%a FLOW FILTER FABRIC ENTRENCHED ti' COMPACTED SOIL � s' VjMn M 7 Till n ! r il- --- --' ` . i 24 ! I r s T A . ..^'`_II__ i14 _ !yF_=j -iI 1- I j!r ]fir t is 1i. 1 1,11,111,1111, ILr1. -,r,! �.t rill ,r-' 1-. '1!r 'T! ., {1 - I `�! 11 1� i l l ir/ i - !- r ,i it '' i :- r"' I I T :L _a - OD TEMPORARY 24" DIVERSION BERM ATTACH FILTER FABRIC TO STAKES OR POSTS & EXTEND IT INTO TRENCH WOODEN STAKE STEEL POST LENGTH = 5' MIM EXCAVATED SOIL BACKFILLED AND COMPACTED 4",4" TRENCH SILT FENCE 0(WI THOUT WIRE SUPPORTI .05- NO SCALE -CURB INLET (z> - - ', , , - y�, -ice ­Cj� =� I , _C_ `" �-CONCRETE BLOCK WIRE SCREEN - � _ GRA VEL # FILTER OR #5 COARSE AGGREGATE. BLOCK & GRA VEL CURB INLET IP SEDIMENT FIL TER 3'07- NO SCALE TOTAL LBS GQ0?AL SLOPE (3.1 OR U= PER KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS, SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. �S PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) Floating Baffle Curtain .... .. . �i 1. .1, .. .._ d :_. i.: . ; 1. . : . f �reas a ; I.: _.,. #� wzontal searns. p avida stre4h. -1 I TertsicYn cable is MseNre are 2' in width• tit ftp; flowon Caw i ,.. as antpto al feature1. . . w " r I are an � I `; `eptwn ieatura .,. ­­­, U) � 11--1 :. Retzivvatrl� !fwd ropers are A sea!e 4n t94n to aid in ft ir4WIation. provides ballast and stw gth, Cul outs in av chain packet A" additional aitclxxs, ploatin BaMe 9 s.LustnrydesigneGandenaireered. ThErnlalGealad erSewn. ifrsRuffed. Filaiingor5usperidad.sN.5.-.apCr:a�;2dtabric.S.S. haat,are. Designed to adjn5tto .hanging&id kweio. An optional spine can increaseireeUoard. and a cat le can be runLnrouflhtris>tr MM-_ts. Flotation is pro, idan bt clad colt !ng, ir'nich ora se2is i itsNs tris tlaa5ng WhantUsrs, Baffles are built in secnons 0`t•2ri0 us tsngtns and are jairced P,y ❑nr-'or CSp,han)s,�ara. Ti-, rnfdufar dasi;in per;niis iti+✓Baf;e',,be shipped t0 Ike job s;t? bnishSL_i Ailthat;srequireaisfastenipgtngatt3erand ffandng into t:osidon. itaseetlon isai3mage-d; itcan be essliy replaced. 5� .Iiia' :..'�Ii��t 2. STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO THE WRE FENCE AND EXTEND IT INTO THE 7RENCH. -.� .,fi11 rr, 1` . SILT FENCE 0i(WI TH WIRE SUPPORT) Na SCALE 1-1 FLOK 4. BACKF7LL AND COMPACT 714E EXCAVATED SOIL. EXTENSION OF FABRIC AND WRE INTO 774E TRENCH. �� o C, ;`) 0 SCOTT R. COLLINStZ U No. 35791 11. a1jg1I -' 11��V�"_ 6 z Li w z I- In LU 0 LU to Z CA- U) JOB NO. 112066 SCALE N/A I SHEET NO. 8 0 1 D U y > a) 0 0 a) A 0 2- 0- 0 `0 0 a) Y) Q) 0 0 C 0 E rn 0 C C3 6 Q C 0 N 0 3 C O O U 73 0 O Q N L n 0 C >1 a E 0 C 0 D z Y 11 �, z D z n 7 J D J 0 > 0 0- 0 L r2 Q) > in 0 X Q) O N a O � C Q) E D 0 0 0 U O in U) 0 C 0 w C 0 D_ 0 Q) i- z w U) z J 0 0 0 O rn O 0 3 U) co n z Z ? UJ LLJ Lit LL! iD Z) 0Ce2: rL ' � o °U m z z z , o 0 o uU.I i3 z ? �TH 0�� � SCOT y CO I S� No. 35791 111- * » / S S Ln % 2 � Ln Ln C 00 0" e 4 � ƒ 2 U) 3 / / E E / / / / S E S/ E 0 CL ® / E u ED 0 0 0 0 O a Q U U U 2 0Lu 7 / / / / f f / % 3 3 a O c O O n 4 > % % % % ƒ — / / / / / / ce± » ? » / S S Ln % 2 � Ln Ln C 00 0" e 4 TOP OF DAM WIDTH=10' 48" RCP III RISER AT ELEV. 659.0 W AT ELEV. 662.00 Lu W/72" DIA., 21" HIGH 16 GA. GALV. STEEL ANTI -VORTEX DEVICE EXISTING GROUND-- TRACK RACK MAY BE FIELD FABRICATED U) 670- - ----------------------------------------------------- ------------------------- 35'EARTHEN EMERGENCY SPILLWAY 3:1 SIDE SLOPES Uj AT ELEV. 660.25 U.1 25 -YEAR STORM ELEV. 661.00' 11 DEWATERING ORIFICE ■ CLEANOUT ELEV. 655.40' ELEV. 656.50' - - - - - - - - - - - - - -- ---- ----------------------------- - - - - -- - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - z 660- -1 I�rM -- - - - - - - - --------- - - ---- - -- - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --------------------- - - --- ---------- - - - - - - ------- -- - - -- - - - - - - - - - - - - - - - - - - - - - - - - - --- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - -- -- - - I ----------------- --------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- ------------------- --- ----------- :2 ----------------------- ■ 650- 30" RCP III BARREL BOTTOM OF BASIN ELEV. 654.40'j L=64.56'; S=0.50% j INV IN. 653.00 VDOT STD. MANHOLE. INV OUT, 652.67 RIM -657.00 640 l _ . l �� � I _J»l { { E I 1 I ! { i 8 I ( � 10+00 10+10 10+20 10+30 10+40 10+50 10+60 10 -70 10+80 10+90 11+00 11+10 11+20 11+30 11+40 11+50 11+60 11+70 11+80 11+90 12+00 12+10 12+20 12+30 12+40 12+50 12+60 12+70 12+80 SEDIMENT BASIN 1 SCALE: V:1"=10' H:1"=10' ,Sedirnent Basin #1 Design '1304 design high, water (ft) 661,01 (drainage area (acres) 1 656.15 19.47 H10i WATFR basin volumes: (using 2' contour intervals) '1567 top width of dam (ft) 'T STORM M.) elevation (ft) contour area (sf) volume (cy) ... ...... . . L. 654.40 17589 0 iia. its 656,00 21297 1150 ..... 658,00 23687 2816 DRY STOWE 660.00 26227 4664 WET• OR E 662.00 28857 6703 baffles: YES principle spillway crest (ft) 659.0 SMMa4T CLEANOW POINT WET - STORAGE RENIM0 170 dry storage pro\Aded at this elevation (cy) 2173 TO 34 C.Y./ ACRE) 21 WiTHOliT i- - CRM OF FAEFIGMY Y SPILLWAY BSER CREST tgtIERING L--- I,- I:: wet storage required (cy) (67*DA) '1304 design high, water (ft) 661,01 dewatering orifice elevation (ft) 656.15 top of dam (ft) 662,0 wet storage provided at this elevation (cy) '1567 top width of dam (ft) 10,101 available %olume before clie-anout (cy) (34*DA) 662 bottom of basin (ffi 654,4 cleanout elevation (ft) 655.4 approx bottom dimensions: 153x190f distance from cleanout to orifice (ft) (> V) 1.1 upstream face slope: 2:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67*DA) 1304 baffles: YES principle spillway crest (ft) 659.0 length of flow, L (ft) 170 dry storage pro\Aded at this elevation (cy) 2173 effective width, We (ft) 153 diameter of dewatering orifice (in) 11.0 L 1 We (baffles not required if > 2) 1.1 diameter of fie)dble tubing (in) (orlfice+T) 13.0 collars: YES runoff: depth of water at spillway crest (ft) 4.6 C (use 0.45 for bare earth) 0.59 slope of upstream -face (ZI) 2:1 tc (min) 1U slope of barrel (Sb) 0;5 1 2yr 41.0 Q 2yr 45,9 length of barrel in saturated zone (Ls) 28.63 1 25yr 5.8 Q 25yr 73.3 number collars required 2 dimension of collars 4.4'x4.4' principle spLry: available head (ft) 1.0 mm -m -nam Afmu-- YES diameter riser (in) 48 required capacity (0,25-00 (cfs) 33.3 spillway capacity, Qp (ofs) 40 bottom width (ft) 18 diameter trash rack (in) 72 slope of exist channel (ft/ -ft) 0.03 barrel length (ft) 100 minimun length of exit channel (ft) 36 head on barrel through embankment (ft) 8.55 crest of spillway (ft) 660.00 diameter of barrel (in) 30 30" RCP III BARREL L=131.08'; S=2.06% INV IN. 648.60 INV OUT. 645.90 12+90 13+00 13+10 r90 13+00 13+10 13+20 13+30 13+440 13+50 13+60 13+70 13+80 13+90 14+00 14+10 14+20 14+30 14+40 14+50 14+60 14+70 14+80 14+90 15+00 Sediment Basin #3 Design M pof, 1: WI SPILLWAY 2 WITHOUT CREST OF EWERGEKY SKWAY drainage area (acres) 6.28 DESIGN HIGH WATER basin volumes: (using 2' contour intervals) (25_"RSTORM ["Ev') elevation (ft) contour area (sf) Volume {cy)r 653,00 9158 0 654,00 9895 352.7 MY' STORArai: RISER CREST MW"IEMW 656.00 11444 1142-4 DEVICE 658.00 13094 2050.5 _j SEGMENT CLEANOUT POINT WET' STORAGE REDUCED TO 34 CY,/ ACRE} _j wet storaae: wet storage required (cy) (67* DA) 420.8 design high water (ft) 657.00 dewatering orifice elevation (ft) 654.6 top of dam (ft) 658.00 wet storage provided at this elevation (cy) 589.6 top width of dam (ft) 10.0 available- volume before cleanout (cy) (34*DA) 213.5 bottom of basin (ft) 650.0 cleanout elevation (ft) 653.6 approx. bottom dimensions: 76x131' distance from cleanout to orifice (ft) (> 1') 1-0 upstream face slope: 2:1 downstream face slope: 3:1 d[y storage: dry storage required (cy) (67*DA) 420.8 baffles: NO principle spillway crest (ft) 656.0 length of flow, L (ft) 112 dry storage provided at this elevation (cy) 552-8 effective width, We (ft) 50 diameter of dewatering orifice (in) 7,0 L / We (baffles not required if > 2) 2.3 diameter of flexible tubing (in) (orifice+2*) 9.0 collars: YES runoff, depth of water at spillway crest (ft) 3 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z:1) 2:1 tc (min) 16.5 slope of barrel (Sb) 0.5 I 2yr 3,3 0 2yr 9.2 length of barrel in saturated zone (Ls) 18.37 1 25yr 4-9 Q 25yr 15.2 number collars required 2 dimension of collars 2.9x2_9' principle spiltway: available head (ft) 1.0 emergency spillway: YES diameter riser (in) 24 required capacity (Q25 -0p) (cfs) 0.0 spillway capacity, Qp (cfs) 16 bottom width (ft) 8 diameter trash rack (in) 36 slope of exist channel (ft/ft) 3.9 barrel length (ft) 44 rTinimun length of exit channel (ft) 32 head on barrel through embankment (ft) 3.6 crest of spillway (ft) 657.00 diameter of barrel (in)_ 18 SEDIMENT BASIN 3. ............ No MW am wa VQOT STD. EC -1 CL. Al 400040 R . IPRAP W/ 10 00 100 GEOFABRIC 000 UNDERLAYMENT L=9; W1=6'; W2= 11'; D=1.4' 24" RCP III RISER AT ELEV. 656.0 PROPOSED 24" CMP -RISER AT ELEV. 656.0 DEWATERING ORIFICE 654.6 CLEANOUT 653.6 PROPOSED 8GRASS EMERGENCY SPILLWAY AT ELEV. 657.00 -'6.6r'nj­--­-.- 18" CMP BARREL ,,L= L.=44'; S=0.50% INV IN -.-653.-6-0 INV OUT. 653.38 we No aft 44V SCALE: 1"=20' W(36" DIA., 13" HIGH 16 GA. GALV. STEEL ANTI -VORTEX DEVICE CLEANOUT ELEV. 653.60' TRACK RACK MAY BE FIELD FABRICATED IITP� FDA AT 658.0 VDOT STD. EC -1 25 -YEAR STORM ELEV. 657.00' j 7" DEWATERING ORIFICE -EXISTING GROUND CL. Al RIPRAP W/ 8'EAFRTHEN EMERGENCY GEOFABRIC ELEV. 654.60' SPILDWAY 2:1 SIDE SLOPES 660 2,0' ----------------- UNDERLAYMENT ------------ -------- L W ATE 657.00 9 L=9'; W1 =6'; 2=1 1, - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --- - ------- - -- - - - - - - -- - -= - - - - - - _- - - - - - - - - - -- - -- _= - -- --------------------------------------------------------- ------------------- j 650- 1 UMU1_bAZ)1N tLt:V_1o0J 1.811 CMP BARREL =44, S=0.50% L 645 V IN. 653.60 -------- - - ------ - --- -- - - ---------- - -------- ------ - -------- 919900 10+10 10+20 10+30 10+40 10+50 10+60 10+70 10+80 10+90 11+00 11+10 11+20 11+30 11+40 11+50 11+60 11+70 11+80 11+90 12+00 12+10 12+20 12+26 SCA V:1"=10LE: * SEDIMENT BASIN 3 H:I"=10' H 0 0 TISCOTT R. COLLTNS'Z U-D N Lo. 35791 ox 10INVAL V, w ai (n > U, (y) C6 U) 0 0 (D 4 C3 z 0 7C) 0 G) N CN < 2 C). > -C w <O > 0 W 0 o0 Z 0 < C) z 0 W W E w0 Ld Ld W f�� L' 0 Ljj F- z W 0 LD 0 0 0 W U_ 0- 0 cl� LIJ ii N :3 X Q) Q) E W O W V) JOB NO. 0 112066 _0 SCALE AS NOTED -a SHEET NO. 13 _j _j 0 V) C 0 ID at U) U) (n u) 0) ox 2: 2: 2 U z 0 0 0 57 0 157 0 C) Q) F- U U U U 0 D Cn z z z Ln :F0 UU) =) =) =) =) 7D LLU M 0 0 0 0 3 __j U U U U z 0 < F_ rx� W rz LIJ Ly LU iiiJ Uj Gl > ill LU LU uj uj LLJof uj ILAI Ln V) M (n 0 > > > > > 0 LU LU LU W ce re cl� 0� (Y 0 S 0 O 0 0 L 00 r1i r14 r'i 0 I I I C ai (n > U, (y) C6 U) 0 0 (D 4 C3 z 0 7C) 0 G) N CN < 2 C). > -C w <O > 0 W 0 o0 Z 0 < C) z 0 W W E w0 Ld Ld W f�� L' 0 Ljj F- z W 0 LD 0 0 0 W U_ 0- 0 cl� LIJ ii N :3 X Q) Q) E W O W V) JOB NO. 0 112066 _0 SCALE AS NOTED -a SHEET NO. 13