Loading...
HomeMy WebLinkAboutWPO201900003 Plan - Submittal (First) 2020-11-06OWNER: STANLEY MARTIN COMPANIES LLC 11710 PLAZA AMERICA DRIVE, SUITE 1100 RESTON, VIRGINIA 20190 DEVELOPER: STANLEY MARTIN HOMES 404 PEOPLE PLACE, SUITE 303 CHARLOTTESVILLE, VA 22911 ENGINEER, COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOT7ESWLLE, VA 22902 (434) 293-3719 TAX MAP NO.: PHASE I 056A1-01-00-02900 (1349 AC) 05600-00-00-00700 (387 AC) PHASE III 055CO-03-00-000AO (16.28 AC) 056A1-01-00-02600 (4.74 AC) PHASE III 056A1-01-00-02500 (1.85 AC) 056A1-01-00-029RO (311 AC) TOTAL AREA: 43.34 ACRES TOTAL AREA PHASE I = 17.36 ACRES TOTAL AREA PHASE ll = 21.02 ACRES TOTAL AREA PHASE 111 = 4.96 AC ZONING: R-6 RESIDENTIAL, STANDARD LEVEL - CLUSTER DEVELOPMENT PROPOSED USE: SINGLE FAMILY ATTACHED RESIDEN77AL UNITS (VILLA UNITS AND TH UNITS) PRESERVED/MANAGED SLOPES: NO PRESERVED SLOPES OR MANAGED SLOPES EXIST WITHIN THE LIMITS OF THE PROPERTY. OFF -SITE PRESERVED AND MANAGED STEEP SLOPES HAVE BEEN SHOWN & LABELED ON THE EXIS77NG COND177ONS SHEET. BUILDING HEIGHTS., MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET SETBACKS FRONT 5' MINIMUM (25' MAXIMUM FROM RA OR EDGE OF SIDEWALK) SIDE: NONE - MIN. 10' BUILDING SEPARATION (ANY BUILDING THAT EXCEEDS 35' IN HEIGHT SHALL BE SEPARATED FROM ANY OTHER BUILDING BY 10' PLUS I' FOR EACH FOOT THE BUILDING EXCEEDS 35' IN HEIGHT) REAR: 20' MINIMUM GARAGE • 18' MINIMUM FROM THE R/W OR THE EXTERIOR EDGE OF THE SIDEWALK SUBDIVISION STREETS: CURB & GUTTER WATERSHED: LICKINGHOLE CREEK WATER SUPPLY WATERSHED AGRICULTURAL/ FORESTAL DISTRICT. NONE TOPO & SURVEY., THE BOUNDARY LINE, PARCEL INFORMAT7ON AND TOPOGRAPHY WERE PROVIDED BY ROUDABUSH, GALE AND ASSOCIATES IN JANUARY OF 2019. INFORMATION WAS FIELD VERIFIED BY COLLINS ENGINEERING IN JANUARY OF 2019. DATUM: NAD 83 EXIS77NG VEGETATION: PAR77ALLY WOODED WITH (2) RESIDENCES ON THE PROPERTY AND EXIS77NG GRAVEL DRIVEWAYS. LIGHTING NO STREET LIGHTING IS PROPOSED 107H THE DEVELOPMENT. ALL PORCH LIGHTS MUST MEET THE REQUIREMENTS OF SECTION 4.17 AND BE BELOW 3000 LUMENS PHASING THIS PROPERTY SHALL BE DEVELOPED WITHIN 3 PHASES. CURRENTLY, THIS PROPOSED PLAN INCLUDES PHASES 2 & 3. BUILDING SITES: EACH PARCEL CONTAINS A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENTS OF SECTION 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. BURIAL SITES., A CEMETERY EXISTS ON THE PROPERTY (PARCEL IMP 56A-1-26). THE CEMETERY SHALL REMAIN AND WILL BE PRESERVED WITH THE DEVELOPMENT. STREAM BUFFERS: THE 100' STREAM BUFFERS SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE FLOODPLAIN: A PORTION OF THE PROPERTY IS LOCATED WITHIN A FLOODPLAIN ZONE AS SHOWN ON FEMA MAP#51003CO229D, DATED FEBRUARY 4, 2005. RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WITH THE DEVELOPMENT. LANDSCAPING STREET TREES SHALL BE PROPOSED WITH THE FINAL S17E PLAN ALONG THE NEIGHBORHOOD STREETS IN ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS SET FORTH IN SECTION J2.Z9 OF THE COUNTY CODE. TRASH: EACH LOT SHALL HAVE AN INDIVIDUAL TRASH CONTAINER. IMPERVIOUS AREAS: PHASE I EXIS77NG BUILDING & S7RUCTURES 2,975 SF PROPOSED ROADWAYS & PARKING LOT 75,500 SF PROPOSED SIDEWALK 23,375 SF PROPOSED BUILDINGS 56,520 SF PROPOSED DRIVEWAYS 17,800 SF FUTURE IMPERVIOUS AREAS 10,650 SF EMERGENCY ACCESS ROAD 11,575 SF TOTAL 198,395 SF (4.55 AC) PHASE ll PROPOSED ROADWAYS 85,500 SF PROPOSED SIDEWALKS 30,800 SF PROPOSED BUILDINGS 142,440 SF PROPOSED DRIVEWAYS 34,110 SF TOTAL 292,850 SF (6.72 AC) PHASE III PROPOSED ROADWAYS 14,650 SF PROPOSED BUILDINGS 62,250 SF PROPOSED DRIVEWAYS 21,420 SF TOTAL 98,320 SF (2.26 AC) LAND DISTURBANCE.. PHASE I LIMITS OF DISTURBANCE = 13.15 AC CONNECTOR ROAD LIMITS OF DISTURBANCE = 1.90 AC PHASE II & III LIMITS OF DISTURBANCE = 16.99 AC OFFSI7E EASEMENT., ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR WITHIN EXIS77NG RIGHT-OF-WAY. NO OFFS17F EASEMENTS ARE PROPOSED WITH THIS DEVELOPMENT. NOTES 1 THIS PROPERTY DOES NOT LIE WITHIN AN AGRICULTURAL AND/OR FOREST DISTRICT. 2) ONLY (1) DWELLING PER LOT SHALL BE PERMITTED. 3) ALL PROPOSED EASEMENTS SHALL BE DEDICATED TO PUBLIC USE. 4) STREET TREES SHALL BE PROVIDED ALONG ALL THE PUBLIC STREETS 40' O.C. IN ACCORDANCE WITH VDOT AND ALBEMARLE COUNTY STANDARDS. 5) THIS PROPERTY IS NOT LOCATED WITHIN A DAM INUNDATION ZONE. L cl PLEASANT GREEN VSMP PLAN AMENDMENT TO WP0201900003 � I❑ of 1 ❑ I M LEGEND �— II 11 11 ❑ ❑ Q\\ CD IO � 1 i I! 0 -- -—L ❑ DiEl ❑ ----------1 - - L WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGINIA ❑ �``' I`' III❑ 111 � \ 1\` SHEET LAYOUT SCALE: 1" = 150' FUTURE PHASE III NE I I ❑ II ❑ \' ❑ »� PHASE y, O PRNATE ALLEY 00--- 0 w I o U i ma EROSION CONTROL PLAN/METRICS SAF SAFETY FENCE 3.01 OP OUTLET PROTECTION 318 EDGE OF PAVEMENT CURB 200 � PROPOSED CONTOUR SEDIMENT TRAP OR BASIN CRS ❑ CONSTRUCTION ROAD STABILIZATION 3.03 RR RIPRAP J. SOIL BOUNDARY BUILDING DRAINAGE DIVIDE CE CONSTRUCTION ENTRANCE 3.02 RR U77LITY STREAM CROSSING 3.25 PROPOSED ASPHALT LIMITS OF CLEARING/GRADING SF SILT FENCE 3.05 SAF TEMPORARY SEEDING 331 STREAM BANKS LIMITS OF DISTURBANCE DIVERSION DIKE aINLET PROTECTION 307 Ps PERMANENT SEEDING 332 _ _ _ _ 100' WPO BUFFER _ PROPOSED EASEMENT -0 RIGHT-OF-WAY DIVERSION o TREE PROTECTION DD TEMPORARY DIVERSION DIKE 3.09 O TREE PRESERVA TION AND PROTECTION ® VARIES WITH SHEET DRAINAGE PIPE DRAINAGE SAFETY FENCE RWD TEMPORARY RIGHT-OF-WAY DIVERSION 3 11 DC DUST CON7ROL 3.39 v BENCH MARK VDOT STANDARD STOP SIGN -C-X-X-X-X-X- SILT FENCE PROPERTY LINE ST SB TEMPORARY SEDIMENT TRAP SEDIMENT BASIN 313 314 . VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER 61 PROPOSED HANDICAP PARKING SPACE STRIPING 00 OO OO OO OO PROPOSED CONCRETE OO OO 100 YR. FLOODPLAIN INLET PROTECTION RIPRAP, OUTLET PROTECTION OR CONSTRUCT70N ROAD - 200- EXISTING CONTOUR STABILIZATION VICINITY MAP SCALE: 1" = 2000' LAUREL H L L S CROZET 12A CROSSING GRAYROCK WAYLANDS *WAYLAND PARK I GRANT T� SITE Starr Hill Bre% Crozet zao eaA REA PARKSIDE 1 VILLAGE lzaa PARK VIEW Old Trail Golf Club ^Try_ BROOKWO Sheet List Table Sheet Number Sheet Title 1 COVER PHASE $ EC GISIGN O SF=9'l..lFLIT GGPI:FRGI NOTES, ,.1/1C RAT-1VE O 9F=:F 11 S STGRMWATER MANAGEMENT LAN -1-8- PHASE II 11 EXISTING CONDITIONS & DEMOLITION PLAN 12 EXISTING CONDITIONS & DEMOLITION PLAN 13 OVERALL SITE LIMITS OF DISTURBANCE AREA 14 EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS 15 PHASE I EROSION & SEDIMENT CONTROL PLAN 16 PHASE I EROSION & SEDIMENT CONTROL PLAN 17 PHASES II EROSION & SEDIMENT CONTROL PLAN 18 PHASES II EROSION & SEDIMENT CONTROL PLAN 19 PHASES III EROSION & SEDIMENT CONTROL PLAN 20 PHASES III EROSION & SEDIMENT CONTROL PLAN 21 EROSION & SEDIMENT CONTROL PLAN DETAILS 22 EROSION & SEDIMENT CONTROL PLAN DETAILS 23 PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN (WATER QUANTITY) 24 POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN (WATER QUANTITY) 25 STORMWATER MANAGEMENT PLAN (WATER QUALITY) 26 STORMWATER MANAGEMENT DETAILS 27 STORMWATER MANAGEMENT DETAILS 28 MITIGATION PLAN 19 TOTAL NUMBER OF SHEETS APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIA DEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT SCOTT /R. OBCLINSZ No. 35791 A 11/6/20�� Z z O O� U w D � J z a H O F z W ~ ce �k r ti cM M N cy) M i W N O N W N Z LU J J_ LU LU O Z lcl� WLU U Y F- I n D C. ZLU LU LU J� Q 0 CD O N W O U U w tu w a Ul) JOB NO, 182154 SCALE AS SHOWN 1 1 � 1 1 - Y --ESE= -1--- 1 _- - - \ \�---------___ EXISTING RAILROAD T IIIIIIIIIIIIIIIIIIIIIITI-11TTYH411LI IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII........'IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII FFIM - +Tn 'GRADING PROPOSED WITH PLEASANT GREEN _ _ - - -- ____________I FIRE HYDRANT PROPOSED UNDER PLEASANT GREEN ----------------- ------------ - BLOW -OFF PROPOSED UNDER PLEASANT GREEN'` I ROAD & UTILITY PLAN - SUB 201 000 1 _ PHASE I ROAD &UTILITY PLANS SUB-2019-0INT9 7 ---- \ PHASE I ROAD & UTILITY PLANS SUB-2019-00071 y - , - - EXISTING RWSA 12" DI WATERLINE - r ? EXIS_TING RWSA 12" DI WATERLINE _ \, L /PHASE �_. GRAVEL ROAD , - — _-' -- i O ° ` i C; MCCOMB STREET ROAD CONSTRUCTION__ -- -- _ W, _ - - � w '_--- - _ _ - ----- - w - - PHASE I ROAD & U P i w N �_w - - — - - _ - - -' - — - - - i - J - , - 7 } - P PROPOSED UNDER NS SUB-2 19-0007PLEASANT 111 w - -- -- - -- _ —w — - - L54 L55 — -- , LS3 s E� a Sz a4�siR �� ,,. ! EXISTING BARN TO BE CM�RG� ACX p�C M�N. — — — ' as- _ _ r'a• F� zqE M^ti*. - �� RENOVATED FOR USE BY / r' ;. �. THE NE r, i / 08-5i i IGHBORHOOD w Z �. . EXISTING HOUSE TO BE C2j - ----- 57 C2 STORM SEWERPROPC�EDWITH �� FIREHYD _ RTED TO A CLUBHOUSE CONVE J `fi �\�: ,� � `. � \PHASE PLEASANT GREEN PHASE I ROAD 20' WIDE PAVED EMERGENCY ACCESS ROAD & UTILITY PLAN - SUB-2�j-00071 `� ? v' r� ;, -%� ` <" '� �, 8' DI WATERLINE P PROPOSED WITH THE PLEASANT GREEN PHASE I - - - / ^✓ \� f�' PHASE I j 1 , �/ , ,a' 'PHASE I ROAD & UT ROAD & UTILITY PLAN - SUB-2019-0007i TO BE REMOVED WITH PHASE II AND REPLACED WITH MCCOMB STREET i V EXTENSION �,, •/ , ", _ , / - Z - ' !, g \,., / \ , ,,�,� '`�S� �c,`' / !` 20' PUBLIC DRAINAGE EASEMENT D.B. 5z6y, PG. 297 . •� , / ,� _ _ FRAME ��j ,_' I �A �. A I SHED i "SDRa6P 6 VC SANITARY SEWER LATERAL/ I I� I ` _ _-/ _- ROPOSED WITH PLEASAN GREEN PHASE I _ ¢ 8' D WATERLINE PROPOSED UNDER PLEASANT GREEN _ _ , _ ROAD & UTILITY PLAN - SUB-2029-00071 PHASE 1 ROAD & UTILITY PLANS SUB-2019-00071 STANLEY MARTIN COMPANIES LLC TMP 056A1-01-00-02500 _ PHASE III \\ o STORM SEWER PROPOSED WITH -- PLEASANT GREEN PHASE I ROA / 1.8500 ac. EXISTING CUL-DE-SAC � / , DB 5226, PG 309 &UTILITY PLAN -SUB-zolg-00071 TO BE REMOVED WITH � r PHASE II CONSTRUCTION - �- STORY FRAME 6t0i^ -\� o`sb - - oN CRAWL a a ao PUBLIC DRAINAGE EASEMENT' , -PARTI �� SE LINE (TY `��_�„ D.B. 5264, PG. 297 EXISTING SANITARY SEWER � �'� � \ ' ��-'/ PHASE / V �� PARTIAL CELLAR � � , TO BE REMOVED AND EXISTING ----_ -�' P.) i i / - , 1 r , zo' PRIVATE DRAINAGE EASEMENT EA_SEMENTTO BE VACATED i ' / / D.B. 5264, PG. 297 B S TMP 0 - - -02900 C TO / ----' / TANL Y MARTIN COMPANIES LL , , i � (' � r r � � '---------' / DB 5226 PG 309 56A1 O1 00 i p0�� STORM SEWER PROPOSED WITH �\ ; T;;� r 13.4900. _ , OUS i,� / o ' PLEASANT GREEN PHASE IROA / _ UTILITY PLAN - SUB-2019-0007a �' L3 -\' �zo UTILITY EASEMENT PHASE II ' \ i -6 PG. 2g _ -___---tea- EXISTING HOUSE_ / / i i i'/' " \ D.B.D - a ---' - / ' TO REMAIN DURING T 11 1E ALLEY / - T � 7 �` PHASE IICONSTRUCTION ,' ��ti �/� -- --� �Iiz,PUIvrTFsr ��' \ / GRADING PROPOSED WITH PLEASANT GREEN C271 o Cz8 ; �r 16a _ L6 - _ - �zPHASE/ �9 7 - C6 , r ao' PRIVATE DRAINAGE EASEMENT�p\ \\ 6 __ �`I ROAD &UTILITY PLAN - SUB-2oa 00o a- C,z -- zo' UTILITY EASEMENT D.B. 5z6y, PG. 297 / ----- ----- - D.B. T LIT PG. a� i i ai I Y DUPREE STREET ROAD CONSTRUCTION _ 97 No. 35791 ,� 11/6/20�� CONNECTION TO PUBLIC STREET PROPOSED UNDER ' PLEASANT GREEN PHASE I ROAD & UTILITY PLAN - SUB-2019-00071 TIE -INTO EXISTING 8"WATERLINE PROPOSED WITH PLEASANT sr AN BLUE RIDGE Esr JARMAN'SI ON" GREEN PHASEIROAD&UTILITYPLAN-SUB-201 0001 nlr.oFawEEIDaeAND �AEnnANsGAP 9- 7 DAD \ � o TMP 6 -35 �- N/F RITZE ,MISTY DARNELL P 62 P- 12 DB 576 PC 3 PLAT) \ �i r R6 i � O TMP 56A1 i- I i OR T SA F. M DB 2143 P MH=72 .53 DB 150 PC 23 (PLAT)Lu \ i 56A1 1 33A A N FBA ER, JAMES L. RES J. OR \ / D D L90 PC 389 \ a DB 1980 PC 534 (PLAT) ` / Lu w --- --__ PROPOSED UNDER PLEASANTGREE _ I 1 I /IV rI - w� r N F SHEA DAN OR \\ ZONING.NR2 r------ _ _---�- '- �` I PHASE 11 o �' / PHASE I ROAD & UTILITY PLANS SUB-2019-00071 ,' FIRE HYDRANT PROPOSED OPOSED UNDER PLEASANT GREEN ^, - "'w 1 `� 1 r r A - i / STANLEY MARTIN COMPANIES ELL / ` - it 1 : _ 1 ; ANC R jAi+ E /�I Q6 / , / a� / ab ,! PHASE ROAD &UTILITY PLANS SUB-2019-00071�� III" B 2413 214 �M TMP 5 -1-32 / _ -- -_ TMP 055CO-03-00-000AO ,�' , ��� s3z- _ - i , i T i _ (v i i lir-�= = - Iz�a ��. 1 L ; JE \ 16.28 ac. / / I 6' DI WATERLINE PROPOSED UNDER PLEASANT GREEN /z-r I -�� / 1 .� qj _, -,, _ i _ _ _ ��_ �, I r B 1980 PC 53 (PLA N/F RARER, DAMES L. Z -- -- -- DB 5226, PG 309 / I `ii A�2� /r o m �` ZONING: R" 0 M A i r r 1 i t w a _ - i 1 111 5 PC 474 CA ' - 'r �8�TANL - PHASE I ROAD & UTILITY PLANS SUB-2019-00071 ' , , , ?'° l GRADING PROPOSED WITHLu EXISTINGaoo WPO--- 4 - / DB12 PG 397 PLAT / - Y � PLEASANT GREEN PHASE I ROAD i ' ' MARTIN COMPANIES LLC_ ,' , �' ,� , ElMITS OF PHASE I ' �' - f r i / i _ -------> i !UTILITY Z NIN . 6 STREAM BUFFER / - TMP56A1-1-32B --;..P N FROM STREAM BANKS, CONTIGUOUS _ / ,' ,' - T�� TMP 0564.744 a00-02600// �' � r UTILITY PLAN -SUB-zoag-0007a - , ��� � I �� � 4.744 Oa -'' i a� '� `l '� � % ��✓3 r � ��� - ' �� � � � � - ALSTON STREET ROAD�� � �\ � � N/F RARER, JAMES L. � M -Q �; / i < A / i i ;._j ',', w '- WETLAND AREAS AND aoo' FLOODPLAIN / / ,' /' _ DB 5226, PG 309 _ m % J¢ 1, 20' UTILITY EASEMENT �,, CONSTRUCTION OR DELORES J. - ��` -' - FIRE HYDRANT PROPOSED UNDER PLEASANT GREEN %' C r Q D.B. 5z6y, PG. z97 3 �"/ PROPOSED UNDER PLEASANT GREEN \ DB 1222 PC 394 � - PHASE I ROAD & UTILITY PLANS SUB-2019-00071 �' "o / / �' / / �,/ PHASE I ROAD & UTILITY PLANS SUB-2019-00071 V A (397 PLAT) o Z __, , ,� — `__- I _____._. _. _ _ / 1 ' - .' /� '�/ i , "� i '• �� ZONING.' R6 _-_ BLOW -OFF PROPOSED UNDER PLEASANT GREENSTORM SEWER PROPOSED WITH TMP Al-1-32A \ N ------ �� - - 1 r = _ - N/F ZEL R, TROY '/, /� 7 , ,w: - PLEASANT GREEN PHASE I ROAD J PHASE I ROAD &UTILITY PLANS SUB 2019 000 r / CN _----------- _-�T / --- -- _ -- �,' &UTILITYPLAN-SUB-zoag-000 1 , ,� � - � i 'r r , � 7 DB 21 4 PC 658 _i I / 00000 �� � _/ i /'�'� �' +_ - --- ,' DB 250 2 LAT) ®® - -- PHASE II PROPOSED o ZONI C: 6 /1 7 ° 000_o r 8" DI WATERLINE PROPOSED UNDER PLEASANT GREEN L.L L ® - ��\ - --' ,, _-= ®®° - ROADWAY EXTENSION AN `� �� ` " ' '� ' PHASE I ROAD & UTILITY PLANS SUB-2019-00071 \ ---' � ` -� � --- � '' ®®®®�-- -_ ----- -- � -_ ___ III 1 ) � � ����-_' � A � r ®���9� _ - --- ,�' _ CONNECTION TO TMP56A-1-26 LI it 1\ C�1 mr , /, l yY� Y w - A ap r - - EXISTING FEMA .�� n o ----- ---- �. I - 0-- 8 � z J � -n -r_ i - j, __ - 100 YR FLOODPLAIN ,' ®®� \` \v' i �d'2 ',`''.� _/'�f' 8" DI WATERLINE PROPOSED UNDER PLEASANT GREEN -_ �' a w" A V PHASE I ROAD & UTILITY PLANS SUB-2019-00071 _ m \ / / / �� ��� i I /' - ,— ' i ® A � - a �� `1 G zo' UTILITY EASE ENT �L%� 1 W L28 - ® " e� { D.B.5264, PG. 297 /// �/ 1 / Lu � r �\ / H � � -' ,' STORM SEWER PROPOSED WITH ®®®®®o®� � / ---- LEASANTGREENPHASEIROAD� �x - _°®®®o®off / / �EXISTINGSTREAM_ - - - �y�- �r GRADING PROPOSED WITH PLEASANTGREEN� ��a ' g 7 .,,,� W _ -A & UTILITY PLAN - SUB-201 000 1 / ' r ®®0 ` �0000 _____YPHASE I ROAD & UTILITY PLAN -SUB-zoag-00071 �( XISTING WETLANDS.-__- i� ���°®®°®®®®®®®®®®®moo®®®®®®®®®®�®O®®®®®®4�0000, ��_�-�F� ''I / V �� ®®®®�_ '-' V `�'� rF-- o o %' // ��� LU Vn - - \ VDOT STANDARD ROUNDABOUT PROPOSED, _ \ 20' PUBLIC DRAINAGE EASEMENT, .o- a i I = ` - / - - _ j \ \ o°O-00 WITH THEPLEASANT & UTILITY PLANEN PHASE SUB zo11 00o D .\ D.B. 5264, PG. 297 / , y°&�' P 56-115 (, _ i -- - - �i i - - �c- - - X\ - 9- 7 - r A �i� ��i' rrir F V SALTY i i� - --- --- - -- V ` _-- __ --- - 00 --- - _ ,� �./ ��ti�®® '- -�;� o EXISTING loO' ' _ _ �_ - - - _'k �� , `®° EXISTING STREA %STREAM BUFFER \ r �----_ __ �__,`---------'�`�I�I ,y � �1 r _--------�F VUE REALT o�- -_- -_ _ ®\ `� \\ o ,/ \V ® b 1 ® _ +� �y r � z Z -- ITA SEWER D d;�� ,,Itil,,. ul _ _ __ _____PARTNERS LLL2-- �-- _ - SSA / 1 , 1� �V ®�® BIO-FILTER PROPOSED WITH PLEASANT GREEN U �DO � N RY S ER PROPOSE UNDER PLEASANT GREEN \ o -" r - -- �I PHASE I VSMP PLAN - WPO-202000o PHASE I ROAD &UTILITY PLANS -SUB-2019-00071 �; SWM EASEMENTLu 9 3 w I r � PG.2g7,® ��® I 1 v v v ®�®®00------------ II _ X ; ® A �� r - f -- I 1 I i STANLEY MARTIN COMPANIES �C — ®®° O�� 3 ` TMP 056A7-01-DO-030A0 ® -- ' I -� o �I� DB 5226, PG 309 _-40 --- ` © � ` ®® CONNECTOR ROAD CO NSTRUCTIONr A __�®®®--- �� - .. . CN ° 1 d _ 0 PROPOSED UNDER PLEASANT GREE I 1 1 ` ` ®® 0\c CONNECTOR ROAD PLANS - SUB-2019-00058 1 ,i `� ��� , r °o® GRADING PROPOSED UNDER PLEASANT GREEN 1 1 1 1 0® goo C®NNECTOR ROAD PLANS -SUB-2019-00058 1 1 °®°®� - _ o _ _ - _ , _,____ ��®®®®®® t) F- In i i i i JOB NO. 1 \ , _-- SCALE ®® -- I�I1II ��I;I��I - -1 182154 ®o r ® l 1 1 I "�� 1 �/ y s 1\ r 1 ®, ® 1 1 P® 1 I 1 i A ram' ,' ;�\ ` °' ®® � o00o 1u - 60' o® , — _ _-- - ----- - — - _______ - ___----- ® _ _ ° � ® � a�I �, _� � SHEET NO. _ _ --- - 11 XISTING ACSA8I DI WATERLINE Li �zo' PUBLIC DRAINAGE EASEMENT \ -hI: D B. 5z6y, PG. 297 _ - — - r a� RANT PROPOSED UNDER PLEASANT GREEN'f®�m XISTING RWSA 12" DI WATERLINE /� ROAD & UTILITY PLANS SUB-2019-00071 60 CE M' A, a VJ ROPOSED UNDER PLEASANT GREEN TMP 6 R UR 6 32 P 6 \ply \ E ILITY PLANS UB-2�0\ -00071 NID P��36 P443DDN0 R6\ \ \ O u r X DB 6 PO 3 ti0N1 0 o 26 �� z Q DINNGG PROPOSED WITH PLEASANT GREEN \ H O 1, \ PHASE I ROAD & UTILITY PLAN - SUB-2019-00071 \ U) z ,I ,r zo' UTILITY EASEMENTuj `U.b.5264,PG 297 T 56A1-1 ui NIP 7LV M \ce o DB �Bif 5 367034 O\ ZONING: R6 \ \ Line Table Curve Table Line # Length Direction Line # Length Direction Curve # Length Radius Delta Li 105.526 N30° zy' 3o.7o"E L36 128.520 S34° 36' 46.i5"E Cz 146.799 172.000 048.9oo8 Lz 57.777 N25° 26' zy.57"E L37 87.76o SOB' 13' zz.85"W Cz 352.277 228.000 088.5262 L3 30.020 S64°33'3543"E L38 82.333 S27°04'03.z5"E C3 19.972 12.5oo 092.5408 L4 27.002 Sib° 38' o6.67"W L39 205.230 S54° 4i 3736"W Cy 42.052 200.500 012.0170 L5 27.011 N58°29'z4.98"E L40 160.000 N65°24'o9.64"W C5 225.6B5 3o6.500 042.iB86 L6 49 000 N75° 23' az.48"E L41 80.260 N68° 59' oz.64"W C6 13.883 333 500 002.3851 L7 5790 NW36'48.52"W L42 256.839 N63o 20'20.64"W C7 15.129 23.500 036.8852 L8 9773 NOS' 3z'0z.z8"W L43 52.00z N63°20'2o.64"W C8 133345 250.500 030.4995 L9 59-236 N04°54'39 11"W L44 3345 N67043'21.58"W C9 50.043 524500 005.4667 Lio i9.8o5 Nz5°zgd033"E L45 zBz.483 N6z°4i378i'W CIO 17.5zo 12.5oo 080.26o8 Lai 16.426 Nz5°z9L46 50.010 N56°56'3g.64"W Cn 32.864 225.5oo oo8.o962 Lzz 77 486 S51° 23'L47 226.800 N54° 53' 37.64'"W Czz 13.612 485.500 ooa.6o64 Lz3 43230 S38° 38'L48 129.985 S38° 38' 44.36"W C23 36.238 47.SOO 043.7227 Lao 29.440 Sn° oz'L49 20.667 N49° 55'5o.6z"W Cz4 39.z88 57500 0390488 Lz5 z3.8zo 5zz°0z'L50 50.0az 54z°5i 47 zi'W Cz5 zz338 47500 Oz57385 Lz6 4z.980 Saz°5i z7.03E _Si ISz.783 S38o 00'58.30"W C16 51.576 482.5oo oo6.2245 Lz7 89.730 S38°37'40.97"W L52 21.412 N45°25'44.29"E C27 8.232 84.500 005.5819 LA 38.520 Soz°33'z9.o3"E L53 172.3oo N45009'52.23"W C18 57756 722.500 004.S802 Lz9 9990 S18°11'25.03"E L54 2oo.000 N43°29'52.23"W C19 46.991 1472.500 ooi.8285 Lzo 51.209 S18°11'25.03"E L55 203.3oo N42o 56'52.23"W C20 287.432 3822.470 0043297 Lu 109.956 S290 46'05.78"E L56 52.44o N25°59'24.77'E Cn 68.4Sz 172.000 022.8020 Lzz 34.249 S29046'05.78"E L57 72.833 N44015'26.84"W C22 67795 228.000 0270367 Lai 36.467 S42°32ozz5"E L58 13353 S30°55'22.04"W C23 155.089 722.000 012.3074 L24 49-073 S13°205459'E L59 113597 S81°08'12.08"W C24 14.536 23.SOO 0354403 L25 73.271 S25°5502.93"E L6o 7.872 N77°21'56.42"E C25 187.zz1 213.500 050.2139 L26 z36.ogo S26° 07 50 15'E L6z zo2.434 S47° 35' 53.8i'E C26 20.440 23500 0498345 L27 175100 S46° 33 z6 a5"E L62 8.083 Szz° 24' o6.a9"W C27 72.158 275500 oa5.0068 L28 z45.47o 556°3234 25"E L63 23389 S47°35'53.8i'E C28 34510 268.5o0 007.3642 L29 97 000 N57° 40 53 85 E L64 9.Bz9 S47° 35 55 67'E C29 244.384 424.505 032.9848 L3o 8z.000 S7z° 16 4z a5 E L65 z5374 S14036' 46 5z"E C30 24.029 23.500 034.2046 0 0 0 0 13 e R ADJACENT PROPERTY OWNERS INFORMATION TAX MAP PARCEL NUMBER OWNER ZONING ACREAGE D.B./PG. 56A1-05-00-000A0 STANLEY MARTIN COMPANIES, LLC R-6 4.24AC 5226/309 56A1-01-00-030A0 STANLEY MARTIN COMPANIES LLC 11 0.50AC 5226/309 REALTY PARTNERS, LLC ?ET CROSSING COMMUNITY 055CO-03-00-01800 GUYTON, JASON RYON 055CO-03-00-01900 RICHARSON, ELLEN M OR ROBERT M 055CO-03-00-02000 SALISBURY, BONNIE L 055CO-03-00-02100 RASCLE, SERGE OR PENNY CHANG 055CO-03-00-02200 CROMER, SHIRLEY H 055CO-03-00-02300 GREENLEE, CLYDE V OR CARRIE L 055CO-03-00-02400 MARSHALL, NANCY H OR REBECCA E 055CO-03-00-02500 BRADLEY, BONNIE LEE 055CO-03-00-02600 WOODSON, RUSSELL WILLIAM 055CO-03-00-02700 THACKER, JAMES E OR BERNICE E 055CO-03-00-02800 LEWIS, RVA A 055CO-03-00-02900 IVONN,MICHAELE 055CO-03-00-03000 I LUECKE. ROBIN J m I ®' m m M 21.85 AC 4.18 AC 0.28 AC 0.28 AC 0.27 AC 0.27 AC 0.30 AC 0.29 AC 0.30 AC 0.27 AC 0.27 AC 0.29 AC 0.24 AC 0.22 AC 0.22 AC 0.31 AC 11 \ \ I / ' 1 1 � - 1 \ -i---- f / \ __h-_ _----------- ----------- __ --_ --'' ----------------------------- --------------- --- N / RP\LR L z z O.o00 5 z° z z E L66 z 000 S86°oz'z 0 'E C z z z.86o 6. 00 009.0900.- 3 4 5 54 9� 5 79� 4' 3 5 9 35 L;z 269.0o0 S42°3o 3o.z5"E L67 z05.428 N25°59'24.77'E C32 32.624 23.500 0795415 L33 a96.coo 545°45'Aa5"E L66 z59 000 S5e 04'5z.z3"E C33 4.875 333500 000.8376 _' _ L34 235000 S37° 33 3825"E L69 526.079 N45° 55' 55 49"E C34 180.767 306.500 033 79z9 / / \ / - - L 8 o S8z°zz'a a 'E L o a 68z 56o°z z 'W ' / i V / AI _ vv / - 49 35 753 4 5' 7 93 4' 75T - / EXISTING CUL-DE-SAC DD / / TO BE REMOVED WITH PHASE II CONSTRUCTION EXISTING SANITARY SEWER TO BE REMOVED AND EXISTING EASEMENT TO BE VACATED 0 PHASE II 4 ---- _ - _ - - - _ --- " / / i' i / / A� _- 1 - � /1 Sid / / / � / / � ■ -- - ---- ,G✓ C / __,, /EXISTING MANAGED / \ �yta - /'� \ \' \ _ \ - - _ s'l 5- ' ' i✓ ,'� S LOPE ( Y AL LU-_ F LU \LIU- _�' 'C _ ---_ _ - � __ , ,-' / -_- - // /- , �X - - / , / _H � � I FROM STREAM BAI STANLEY MARTIN COMPANIES LLC '/ I' ,� /-X �X/ ,' ,�_\ I / II / /'/ .-Q-iLU 1 WETLANDAREASANI _-�- TMP 05 - -0 -000AO 1 , / � / v-_> -' � - - w _ � - / ' \ 5C0 03 0 s/ - 92.28 Paco. rv� , .'�\_,, / -- - ----- DB O / 26 309 _ ' _ EXISTING SANITARY SEWER ,_--- - `� / / 'E STING ENCE ,� _ XIS NG F �- \ EASEMENT TO REMAIN AND �`�'s_ i< / / /' TO BE REMOVED /� �r�� \\ \ \ 00000 / /' / / _ V / 5 _. - -' _ / i3g / / /®® A / a/ ° A - / / _ --__ - i-0II _® O < O \ / O� \. /'' ' /' / - -� 1 /-____ -- = ---------- -- // // /�/ I/// Op0®A O , ✓_ ®®0 -_ / 0\p� s ' , /' ' - ®-p"0"� 0 0 ® o a _ EXISTING ioo' WPO - o v v / p / _ - --_ _off° v ®� ' // -,'� -' STREAM BUFFER-�----------- / / ®®® _ ----------- 0 o/ - , �� '' / FROM STREAM BANKS CONTIGUOUS _ / / _ _ _ \ r-------- -- A._ - -- ® ® - \- q/' DAREASA AND --------- `` e .'i/°°� // -- --- \\ x / ,/ WETLAND N v r ID .1p p-A - - / asz' \ EXISTING FEMA ? I / 6® � - - ��1 O YR FLOODPLAIN ®a - - 0 a i ' / --- - ® / ' / _ - " ® o-®- ®®� ) �_- EXISTING WETLANDS_- _ --- o®\,%-- - /r / / 1 i m - -- --_ ,' it ----- `v�J ®® _' / --_ _ _ rn ----- ---- / \ _ --- / , -rim o l o®o / I ii ® ® _ 0� \ \\ _, \` o EXISTING COUNTY DEFINIED PRESERVED j /' / ® ®o - / ,'/ II ® STEEP SLOPES TO REMAIN TYP / / 0® 0� o°® v / / / v A ,•- ,' / , v 1 /-/5� - _ �Q0'0000®00 ®00000 \ v ® s m - % a ' / 0 0 -� / 1 A v I 0 % \i �ati/�\ � - / , -, 010 ,/ /' EXISTING WETLANDS.'' ®® ,' j \v A /' l / / -' - EXISTING STREAM /I , /' ®®� '✓i / '✓ _ - - -o v pp®odam/ ----- ®p0001000 oo ® °0000 0-/ _------- -®�-- ----- ------_ 0 - L ' T ---- -------------- ®o " iv - - 600 I� I / -, , �c s s 3 s s_\ - /-� _-- \\\ _ ________�,��_�� _ I V \ l I j I s �s -- _ - - _ _ _ _ _- - - - - - - / II I I I I I I ❑ I I D I Iit I ID I I I / � I I I II I I I I I I I 1 10 1 I I I I � I � 1 I 1 1Lit o 0 1 1 , \ No. 35791 11/6/20 Z O Q U ED W (n Q J Z < O F- (n Z fic Uj F N �-J l'� MM) CM N 4 M W N O N w \N I n D C. 78t:' Am z Q Q J J � z C� 0 G J L LU I Q z as L U In oC 0 `/ Q zz O (n Z L U I— J � w F- a En 182154 SCALE III =6o' SHEET NO. 12 M. i �L' IN 1 ❑ — - -- — ❑ o sc z / — — — NSA ------- D ONo. R35791 I /' // li , ' l , i , ,❑'/ \, - / \`�` — -------------- I- ----- - - --- IN I - — --- _ - ❑ IT _ _ 1 t ❑ � I I � A I � A El _ 1T ___ -\� .T _ - __ _ _ "� -�_ _ ,� ___ 1 111 `\\ ___ `1\'1 111 1 1\I 1\1 1111 ` ` '1 1 \_ _ 1 � _ ______ -----' - __ _ �� _-- A 1- _ -- V �` PROJECT � ❑ ,\ - y -- - - - - - -- - BOUNDARY I_ I --1 �'_ -------------- IN - —J 1❑ �' -' - \ -- -- - _-- - - =----------- IN- _ MI F _- }- ❑ -- LI 16.99 AC) I TI IN l \ \� __ / PRO - - -- O D ----- �" ❑---------- NA, Y - - — I ` " I AD z a O - --- - -- ❑ ❑ � Z 0 _' T — -� 1 ,A LA w cn / — ❑ �' \ ❑ I = ; i / ,� ERG�Nc , , - ❑i I Yl oz - ----- z Q ❑ LY _ ,------------ ' '' ='"- '` =' \ `❑ \ ',_=� _ __' < / � STANLEY MAR11N -------- -- _- - O " ,- - '❑ O - \ \ 2'' \ ` _�" ,-'_ - _ - --- / COMPANIES LLC PHASE III - - ❑� INN\ -❑-� 'I _ / 1 TMP _ _ `�, \ \ / PHASE / 056A7-01-00-02500 : LINE _ 1.8500 ac. DB 5226, PG 309 < --- - ❑ , , \, \ PHASE II = — S ANLEY MARTIN PHASE - — - BOP M�=,z 5 / ✓' �'4 _ �/ _--"-/�' COMPANIES LLC _ / �i -�,�` \ \ " JECT_ _ TMP 05613.49 a00-02900: +f� /' DB 52 G 3 , . I TEA _ _ \ Q , � -- _ --' \\ , 2s P os � ❑ ' PLEASANT GREEN T ' /� ��_• _ ,� TOP PHASE II & III M. '�, ❑ - ROPOSED LI S F_ - 1 i -- / %' �M�PN�/- F C / / LIMITS OF DISTURBANCE __w-- dI BANC6 (1 AC) / °_ __ -- / / (16.99 AC) ___ / PHASE II r R , , '_----- --___ / - --- I '// STANLEY MARTIN A STANLEY MARTIN — ' _ - _ // _ �'�''/ - - / _ -----" - Xx L ' I / _ - _ - , _ _ COMPANIES LLC =_ _ COMPANIES LLC X x - ' - Ly _ - - PHASE I / _ e _ -:�. TMP 056A1-01-00-02600 \ — WPOzoi 0000 - "--- ----- --' " -'--- ----'" TMP O55C0-03-00—OOOAO;W' — __ ��--- — - - -- -- = -' ��/' '�I ,, -----�. __- ac. / �'� '— �\\� ` — - ,— �� IMITS OF DISTURBANCE 1, \ \ -----' , / s; ' /'' ''/ --- �,-. i -// — - DB 5226, PG 309 - - _ , / \L9 ❑ �� / s, ---- - - DB 52268PG 309 _-- - - ,'�- — '/� -- (i .i AC) / / x -- _ _ — -- —_i' - `' _ ' ' 0000 `' - --- , _ -- _ / _ _ / • _ _ _ �_-'' l ° — / �' _ neoss36°000 __ _ _ ,� __, '", - e°pOOp000ab , __ e°aeo' eaeoe9aoQe 'an°ue000000- / / ,/ _ ,o '000av°ooeoo / _ - - - o oa000esotio9 _ i 0. ff o9' ° ~ PHASE LINE 'A_ _ 0 \ CV NO --- oo-o_0-00_0_ oo\ooneoo-o-o00000- \V°Ao° o d�eo/o`OO o5%1 e- P- _��ROPOSE-D-LIMITS OF _ -1�� „_ _ e 'k �° onooeo -DISTURBANCE (1.99 AC) o°0000 ,V A V\ , ' S� MN1 i 3 O06" ` - , _ ___ - � _ � , _ _ - \\ .E♦ , I -- — - <�r����4 ` \ �E �� �� �� \ W on � _ `��' �� PROJECT Q `�ooeodoeo oo _ oeaoaoR._ _ _ _ _ - _ _ �� O +.} \ _ \' ' Q - BOUNDARY 000 _ oo --- _ - - /_ _ `� ,V.�J ,_ ���\� OOpo400°O V 000e , ° °4'oe _--_—'' s" ° e ram', / 1 + I V •• Z . ° 000 o — O' ___—_—_ -- _ _ _ _ _ �� _ ______-___' _ _ `VA VA ,"'.A:, o 1 (1 / ° W ° ` 00000Loeeeeo 002_ 'o — — - __ _ - o, - __ _qveO oeoodbbo I e �� ___-_ -- - --- - _ o, I \ ❑. OOpOoo _—� °eeo8oeo aw_,0000e000 o\O oO - .. __ - --_ — _ /' _ �A V",I 1 0 // �`i -/-� 1 �1�� I oOOoo _ y�� ' _ _ 1 - - ..� O — — - - - ---- - " _ �/ BOUNDARY 111` °°, TANLEY MARTIN ---- Q __"- -`''bo --- - _-_ ��\ I I I �� "oe - - �v �1` ° COMPANIES LLC nnaeu _ Lu % ❑ - __— TMP O5 — — —030A0 _ _ S e— -------------- I_ %— �- -- I ❑'`. �V ��� ::�_ A o� DB 5226, PG 309 �1ceoono °°o I I I I — — \ \ \ "'� PLEASANT I /— —e '°-ens O Q Z` ------ IV \``I I /- / 000 \`,,., I ' i 1 I I '� �\:\�.\11 .\\��. �-�� PoeoO � °°- neeo.o.n°00000 _ - o � _ eo I I 1 , I I I I , I - ❑ `. `�`,`;,\�,\\\\�., i.- o°e _ GREEN I ,------- ��eoeo - o - -- ❑ I I I I r�7y ❑ }— �� \ ❑-- �� ":`�; AV °°Oo �- CONNECTOR ��-�.-� - LJ_ I I I �}- `\```.�c\ �_ ``-/-/- 0000 00000 I I 1 I II_fl I I ' \ o ROAD I I \ 1 ' 1 1 I ❑ \ 1 ' - _ ��� WPOzoigo0ooz -�i1 � I _ -' ---' _ �-_ ---Lu ----- - i I 1 I ❑"mac., A:.�`I�`;,A`,A o° LIMITS F -'� V > V) 1 1, IN DISTURBANCE \`i /----, -------_ _____ _--- - - -- - Ci LL �'I 1. - - 1_—__ _L— I 1 ❑ �/ �/ __ (332 AC) — 1 ❑ i I Q--— __—__ __ ---❑ Q—- PEAC❑- I _ -- — I, ❑1 I /\, ❑\ A �% �, /' , / V V \ \ \.`ia�:c\��� \ `��`.� \ �\\\�.\ OR\\CH_�-- '/ , - _,/// ji � `"QE o'' _<onoO` L " ' ( fiOr0' an°_/'/�:�_�io,,o ;/eo/ron/P�\:lP_/o1o/o e :f:0000000R---o-o- EE OO `-\-v , ,—_A—moA_w„c H TR ^0\ 00 Lij OonI000°° - --_Lu �./ LJ Lu J w J I--- I \ V �r u-- —" -- —"" ❑ ❑ — — — --- ---- — — — I ❑ I ` %'/ ` PLEASANT L u GREEN �' � I ❑ ,/ j' CONNECTOR 0 Lu — — — — — Ci \ \ \ I ;/ --__ '�~ ROAD O/ O ❑ _ _ ° I `'\ �� I _"%" WPOzoig000a7 \\ ,' 0 �— ❑ ❑O y ;/ ❑ / LIMITS OF Q C\ — — I ❑ I --_0 — - -- — — \ \ \ DISTURBANCECD ❑ _ _ 1 ❑ I \ \ \ ❑ /� C:) I � I El ElV 1 , 1 I 1 1 11 `\\ V \/v/ \ \❑ / \� ` `\ O w � /� aEn \ \ \ ` \ \ 182154 I ❑ I I I 1 ; I ' 1 , 100 ' 50 1 JOB NO. , 0 I 200 I 1 4001 ❑ 1 1 , , `\\ I I � I � \ � � \ �' \ \\ \ � o\ SCALE 1 1 ' , ED ' ; I f1 Ej I ❑ I ( IN LH' 10 ) ' 1 ' , ' ' \ \ SHEET NO. ' 1 inch =; 100 ft. I � I � ', ❑—�—� L I 113 -- 1 EROSION do SEDIMENT CONTROL EROSION CONTROL NOTES DESCRIPTION OF EROSION & EROSION CONTROL NOTES & NARRATIVE MEASURES: 1. THE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO THE SEDIMENT CONTROL MEASURES: PROJECT DESCRiPnoN: PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TTHE COMMENCEMENT OF LAND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN DISTURBING ACTIVITY, AND ONE WEEK PRIOR THE FINAL INSP£C THE PURPOSE OF THIS LAND DISTURBANCE AC770TY IS TO CONSTRUCT THE RESIDENTIAL HOMES AND THEIR CORRESPONDING ACCORDANCE WITHH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTCT ED AND INFRASTRUCTURE FOR PHASE II OF THE PLEASANT GREEN DEVELOPMENT IN CROZET, VA. THIS PROJECT PROPOSES TO DIS77JRB 16.99 STRUCTURAL PRAC7CES USED /N THIS SECT/ON CONSIST OF THE FOLLOWING: MAINTAINED ACCORDING TO MIN/MUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL MEASURES: as OF LAND, /N ADDITION TO THE 1315 cc. ORIGINALLY APPROVED WITH WPO201900003. THE PROJECT WILL BEGIN ITS EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA77ONS VR CONSTRUCTION WITH THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS ANTICIPATED TO BE IN THE 3.01 SAFETY FENCE., 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. IT IS ANTICIPATED THAT THE CONTRACTOR WILL USE A CONSTRUCTION ENTRANCE, SPRING OF 2021. THE WORK IS AN77CIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE IN THE FALL/INTER OF 2022. A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CON7ROL J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR RIPRAP, OUTLET PROTECTION, DIVERSIONS, TWO SEDIMENT TRAPS, THREE SEDIMENT THE CONVERSION OF THE TEMPORARY SEDIMENT BASINS TO PERMANENT SWM FACILITIES MAY OCCUR AT A LATER DA7E IF PHASE Ill's MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY AS THE FIRST STEP IN CLEARING. BASINS, INLET PROTECTIONS, AND SILT FENCES TO CONTROL SURFACE DRAINAGE. CONSTRUC7ON OCCURS DURING THIS TIME FRAME. THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE EXIS77NG SITE COND/TIONS• CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. MAINTAINED ON THE SITE AT ALL TIMES. THE AREA OF THE PROPOSED DEVELOPMENT CONSISTS OF OPEN FIELDS AND EXISTING WOODS LIGHT UNDERBRUSH. THIS SITE 5. PRIOR TO COMMENCING LAND DISTURBING AC77Vl77ES IN AREAS OTHER THAN ACTIVITIES STOCKPILE LOCA7IONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH GENERALLY SLOPES FROM THE TO POWELLS CREEK LOCATED ALONG 774E WESTERN PROPERTY LINE 774E S/7£ /S GENERALLY 302 CONSTRUC7ON ENTRANCE; INDICATED ON THESE PLANS (INCLUDING, BUT NOT L/M17ED TO, OFF -SITE BORROW OR A TEMPORARY VEGETATIVE COVER. TEMPORARY STOCKPILE AREAS THAT ARE USED FOR GENTLY SLOPED AND IS WELL DRAINED. A STABILIZED GRAVEL CONSTRUCTION ENTRANCE LOCATED AT POINTS OF VEHICULAR WASTE AREASTHE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION STORING SOIL UNTIL A LATER TIME FOR SPREADING WILL REQUIRE MAINTENANCE & ADJACENT AREAS.• INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD CONTROL PLANN TO 774E OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. SHALL BE SURROUNDED BY SILT FENCE AT ALL TIMES. PERMANENT SEEDING WILL BE THIS SITE IS BORDERED ON THE EAST BY RAILROAD TRACKS AND EXIS77NG RESIDEN77AL DEVELOPMENT. POWELLS CREEKS EXISTS TO CONSMUC77ON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 6. AUTHORITY. 774E CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDI770NAL EROSION PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE THE WEST. 774E EXISTING PHASE I PLEASANT GREEN DEVELOPMENT EXISTS TO 774E SOUTH AND EAST. SILT FENCE WITH WIRE BACKING, THE AMOUNT SEDIMENT 1RANSPORTED ONTO PUBLIC ROADWAYS CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE DIVERSIONS, SEDIMENT TRAPS, SEDIMENT BASINS, INLET CONTROLS, AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT 774E DETERMINED BY THE PLAN APPROVING AUTHORITY. P07EN77AL FOR CONTAMINA77ON OF 774ESE ADJACENT PROPER77ES AND WATERWAYS ROAD STABILIZA77ON: PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR OFFSI7E LAND DISTURBANCE.• THE TEMPORARY THE TEMPORARY STABILIZATION OF ACCESS ROADS SUBDIVISION ROADS PARKING STABILIZA77ON 7 ALL DISTURBED AREAS ARE DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. OFFSITE LAND DISTURBANCE IS LIMITED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL PLEASANT GREEN AREAS, AND OTHER SITE VEHICLE 7RANSPORTA770N ROUTES W7774 STONE IMMEDIATELY BOUNDARY. AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION UN77L FINAL STABILIZAT70N IS ACHIEVED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE TRAFFIC DURING WET WEA7HER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING 8• DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH SOILS OF PERMANENT ROADBEDS BETWEEN THE 77ME OF IN177AL GRADING AND FINAL FILTERING DEVICE. SEE SOIL DESCRIP77ONS ON THIS PAGE AND THE PHASE l EROSION & SEDIMENT CONTROL PLAN FOR BOUNDARIES, SOIL TYPES AND STABILIZATION. USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE 9. THE CON7RACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY FAST GERMINATING VE'GETA770N IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. GENERAL SOIL DETAILS. CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. CRI77CAL AREAS,• TRAFFIC. CLEANUP TO MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL POWELLS CREEK AND ITS IMMEDIATELY ADJACENT WETLANDS ARE LOCATED ON THE PROPERTY. THESE ARE LOCATED DOWNGRADIENT BE MADE IMMEDIATELY. 3.01 SAFETY FENCE - SAFETY FENCE IS PROPOSED AROUND THE SEDIMENT BASINS AND FROM THE PROPOSED DEVELOPMENT AND ARE CONSIDERED CRI77CALLY SENS177VE AREAS. THE EXIS77NG ADJACENT RESIDEN77AL LOTS; SILT FENCE: )0. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. THE RAILROAD TRACKS/PROPERTY AND THE EXIS77NG ONSITE STRUCTURES PROPOSED TO REMAIN WITH PHASE lI DEVELOPMENT ARE A T FILTER FABRIC A TEMPORARY SEDIMENT BARRIER CONSISTING A SYNTTS 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SEDIMENT TRAPS ALSO CRITICAL AREAS. THE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAU77ON IN AND AROUND THESE CRI77CAL AREAS TO R7 A STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED TO SHALL BE INERT MATERIALS ONLY FREE OF ROOTS STUMPS WOOD RUBBISH AND • _ 3.02 CONSTRUCTION ENTRANCE TO REDUCE THE AMOUNT OF MUD 7RANSPORTE.D ENSURE SEDIMENT IS NOT DEPOSITED ON THEM. TREE PR07EC770N FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERA7ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, 12. OTHER DEBRIS BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED. AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL PER ZONING ORDINANCE SEC77ON 5.1.28. 3.03 CONSMUCT70N ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY SEQUENCE OF CONSTRUCTION: CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SEC77ON 13-JOl ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT 1- CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW OF 774E CODE OF ALBEMARLE. REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND PRE-CONSTRUCT/ON MEETING. AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT 2. PRIOR TO DISTURBANCES, 174E LIMITS OF DISTURBANCE SHALL BE FLAGGED AND 174E TREE PR07EC770N FENCING SHALL BE MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL SHALL BE LIM17ED TO THE HOURS OF 7:00 AM TO 9.00 PM FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE INSTALLED. HANDBOOK (VESCH). 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT CONTRACTOR PARKING & STAGING AREAS AS NEEDED. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. INSPECTOR ON THE PROJECT. 307 STORM DRAIN INLET PROTECTION: PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY 4. INSTALLA77ON OF THE PROPOSED CONSTRUC7ON ENTRANCE AND ADJACENT SEDIMENT TRAP SHALL OCCUR NEXT. THE A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 3.07 STORM DRAIN INLET PROTECTION- STORM DRAIN INLET PROTECTION IS SHOWN ON CONTRACTOR SHALL APPLY CONSTRUCTION ROAD STABILIZA77ON AS NEEDED TO THE CONSTRUC7ON ENTRANCE AND CONTRACTOR DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR THE PLANS WHEN INLETS ARE CONSTRUCTED BUT THEIR SITE's CONTRIBUTING DRAINAGE PARKING / STAGING AREA. CONTRACTOR SHALL ENSURE THE CONSTRUCTION ENTRANCE DRAINS TO AN ADEQUATE E&S SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET CONVERT TO PERMANENT STORMWATER MANAGEMENT FACIL177ES WHERE APPLICABLE AREA IS STILL BEING STABILIZED. MEASURE, AS SHOWN. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERA7IONAL ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE PUBLIC ROADS, PROVISIONS SHALL B£ MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO 174E BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE SALE OF ANY LOT, UNIT, BUILDING OR OTHER POR77ON OF THE PROPERTY. 3.11 TEMPORARY RIGHT OF WAY DIVERSION- A RIGHT-OF-WAY DIVERSION IS PROPOSED PAVED SURFACE WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED AREA. 17. TEMPORARY STABILIZAT70N SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING ACROSS THE CONSTRUCTION ENTRANCE, WHERE SHOWN ON THE PLANS. THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND 311 TEMPORARY RIGHT-OF-WAY DIVERSION: IS TO BE AT 75 LBS ACRE AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO / 3.12 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS 50 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE OR IN MARCH CONSIST A 50 / 313 SEDIMENT TRAP- TWO SEDIMENT TRAPS ARE PROPOSED. REMOVED IN THIS MANNER. DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN 174E FLOW AND APRIL TO CONSIST OF ANNUAL RYE OR MAY THROUGH AUGUST TO CONSIST OF 5. THE lN171AL ESC CONSIRUC770N MEASURES AS SHOWN ON THE PHASE l EROSION &SEDIMENT CONTROL PLAN SHALL BE LENGTH WITHIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING 174E EROSION POTENTIAL GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. AL7£RNAT7VES 3.14 SEDIMENT BASIN- THREE SEDIMENT BASINS ARE PROPOSED. INSTALLED NEXT. 774E CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE AND TREE PROTECTION.PERIMETER BY DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 3.18 OUTLET PROTEC7ON- OUTLET PROTECT70N IS PROPOSED AT THE OUTLET OF THE MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE AC77WTY AND DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTION 18. PERMANENT STABILIZA77ON SHALL BE LIME AND FER77L/ZER, PERMANENT SEEDING, AND SEDIMENT BASIN. SEE THE ESC PLAN FOR THE DESIGN LOCATION. SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. TRAFFIC WITHIN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, J. RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF THE SEDIMENT BASIN. 6. ONCE THE PERIMETER EROSION CONTROL SILT FENCE AND TREE PR07EC77ON HAVE BEEN INSTALLED, AND THE COUNTY ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT INSPECTOR HAS APPROVED THESE MEASURES, LIGHT CLEARING AND LAND DISTURBANCE MAY BEGIN FOR 774E REMAINING 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING 3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PERIMETER CONTROLS. THE CONTRACTOR SHALL BEGIN WITH THE INSTALLA77ON OF THE SEDIMENT TRAPS AND SEDIMENT BASINS J.12 DIVERSION: SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL PLAN. SHOWN ON THE PHASE l ESC PLAN. FOLLOWING THE INSTALLA77ON OF THESE MEASURES, THE CONTRACTOR SHALL INSTALL THEIR A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPOR77NG EARTHEN RIDGE ON FESCUE AND 0-57 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS 3.38 TREE PRESERVA77ON AND PROTECTION- TREE PROTECTION IS PROPOSED WITH THIS CONTRIBUTING DIVERSIONS AND ANY REMAINING SILT FENCE. FOLLOWING THIS, THE CONTRACTOR SHALL INSTALL ANY REMAINING THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON -EROSIVE VELOCITIES. APPLIES TO BE APPLIED AT 80LBS 100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE / PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS EROSION CONTROL 17EMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND WHERE RUNOFF FROM AREAS OF HIGHER ELEVA77ON MAY DAMAGE PROPERTY, CAUSE 19. EROSION CONTROL INSPECTOR. MAINTENANCE: MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH 3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 7. ONCE ALL THE PHASE l EROSION CONTROL 17EMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETA77ON ON LOWER AREAS WHERE SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING AND WHERE THE SLOPE LENGTH NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE THE REMAINDER OF THE SITE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN 8. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON 3.13 TEMPORARY SEDIMENT TRAP: NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION THE PHASE ll EROSION & SEDIMENT CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT DYKES WHICH ARE COLLEC77NG SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED MAINTENANCE. FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AND REPAIRED IMMEDIATELY. IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL TAKES PLACE. ADDITIONALLY, THE PREVIOUSLY INSTALLED SEDIMENT BASIN, SEDIMENT TRAP AND PERIMETER DIVERSIONS SHALL AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT REMAIN OPERA77ONAL AT ALL 77MES THROUGHOUT CONSTRUC7ON AND SHALL BE MAINTAINED THROUGHOUT THEIR LIFE CYCLES. USE BELOW DISTURBED AREAS WHERE THE TOTAL CON7RIBU77NG DRAINAGE AREA IS W/7H/N 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD /F NEEDED. SPECIFIC THIS WILL CON77NUE TO OCCUR /N EROSION & SEDIMENT CONTROL PHASE I/. LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS 9. PERMANENT OR TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNC77ON 21. THE £&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE £&S CONTROLS AS a. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN GRADE IS REACHED ON ANY POR77ON OF THE SI77 TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WITHIN SEVEN DAYS TO WITH A TEMPORARY DIVERSION DIKE. NECESSARY IN 774E FIELD AS SITE C CHANGE. IN ADDITION, NO SEDIMENT ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER 774AN 30 DAYS. BASIN OR TRAP CAN BE REMOVED WITHOUT WITHOUT WRITTEN AUTHORIZATION. L GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT b.WI STABILIZA7ION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. J.PERMANENT BASIN: A TEMPORARY 1RARY BARRIER ORELEASER DAM W7H A CONTROLLED STORMWATER LL PREVENT DRAINAGE ALCLOGGED IS SEDIMENT THE 10. ONCE THE S17E IS GRADED, ALL THE PHASE III EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE STRUCTURE FORMED BY CONSTRU NG AN EMBANKMENT OF COMPACTED SOIL ACROSS SOIL DESCRIPTION GRAVEBE REMOVED AND CLEANED, ORWILLBE REPLACED. IT IS PROPERLY CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR PROCEED WITH THE PHASE 111 ESC PLAN. CURB AND GUTTER, WALLS, AND ROADS. INLET 11. THE CONTRACTOR SHALL BEGIN INSTALLATION OF 774E U7WING IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO 7B- BRADDOCK LOAM-2 TO 77 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE , BE SHALL BE INSTALLED ON ALL INLETS lA4T FOLLOWING THEIR THE INLET SHALL BE SHALL SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG CLASSIFICATION, SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSIT70N REACHED HALF WAY TO THE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF 774E STONE FILTER BECOMES CLOGGED AND DE AS TONE FILTER DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". TOP OF THE BARRIER. SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A K17H SEDIMENT SO THAT IT NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE PULLED AWAY AND TEMPORARY IMPOUNDMENT SC3- BRADDOCK LOAM, 7-15% SLOPES, ERODED. SOIL IS VERY DEEP, WELL DRAINED, d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS CLEANED AND/OR REPLACED. AND MODERATELY PERMEABLE. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 12. ONCE PROPOSED CONSTRUCTION IS COMPLETE THE SITE /S STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE J.18 OUTLET PROTECTION: 0-g" THICK. THE DEPTH TO THE WATER TABLE GENERALLY MORE THAN IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD CONTRACTOR CAN REMOVE THE EROSION & SEDIMENT CONTROL MEASURES. FINAL 77MING DETAILS ARE TO BE COORDINATED STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES 7- CR OW LOAM-0 70 2% SLOPES. SOIL IS WELL DRAINED WITH A VERY LOW L OR CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS 77ME IS DIGS. BROOK WOOD WITH BETWEEN THE CONTRACTOR AND THE INSPECTOR FOR THE CONVERSION OF THE SEDIMENT BASINS TO PERMANENT SWM PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT RUNOFF CLASS/F/CATION. SURFACE LAYER /S TYPICALLY LOAM AND ABOUT 0-8" RUNOFF CLASSIFICATION. DIGS MAY BE REACHED AT 434 978-4435. IN ADDIT70N THE OWNER MAY BE ( ) FACILITIES. NO I7FM SHALL BE REMOVED, THROUGHOUT ALL PHASES OF CONSTRUCTION, UNLESS 774E UPSTREAM AREAS ARE SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". CONTACTED. UPON COMPLETION OF THE PROJECT THE OWNER WILL BE RESPONSIBLE STABILIZED AND 774E INSPECTOR GIVES PRIOR PERMISSION. MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND 258- DYKE SILT LOAM-2 TO 7% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF FOR SITE. MAINTENANCE. 13. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN 774E VIRGINIA EROSION AND SEDIMENT ENERGY OF CONCENTRATED STORMWATER FLOWS. APPLICABLE TO THE OUTLETS OF ALL CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-8" THICK. CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY 774E LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE W1774 THE PIPES AND ENGINEERED CHANNEL SEC77ONS. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. J.19 RIPRAP: 36D- HAYESVILLE LOAM-15 TO 25% SLOPES. SOIL IS WELL DRAINED WITH A HIGH RUNOFF 14. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR CLASSIFICATION, SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-7" THICK. STABILIZA77ON OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT 174E SOIL FROM THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF SLOW , SLOW THE VELOCITY OF NC THE EROSIVE FORCES OF CONCENTRATED RUNOFF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. CONCENTRATED RUNOFF WHILE ENHANCING THE P07EN71AL FOR INFILTRATION, AND TO REFERENCE, WEB SOIL SURVEY ONLINE DATABASE, FOUND AT STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE http://websoilsurvey.nres.usda.gov/app/Web SoilSurvey.aspx WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA77VE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW COND177ONS. GENERAL SLOPE (3T OR LESS) PER ACRE TOTAL LBS 331 TEMPORARY SEEDING. KENTUCKY 31 FESCUE 128 LBS. THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY RED TOP GRASS 2 LBS. SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION SEASONAL NURSE CROP 20 IRS. AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO 150 LIES FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEASONAL NURSE CROP SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTON TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT FEBRUARY 16 THROUGH APRIL ANNUAL RYE VEGETA77ON OR 07HER EROSION CONTROL MEASURES CAN BE ESTABLISHED. MAY I THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE 3.32 PERMANENT STABILIZATION: NOVEMBER THROUGH FEBRUARY 15 WINTER RYE THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY NOTES: PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS AND ALLOWS SELECTION OF THE TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION RECEIVE A PERMANENT VEGETA7IVE COVER. OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. 338 TREE PRES2VAT70N AND PROTECTION: PERMANENT SEEDING SCHEDULE PR07FCT70N OF DESIRABLE 7REES FROM MECHANICAL OR OTHER INJURY DURING LAND PC •7 NO SCALE DISTURBING AND CONSMUC770M ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, (STD. & SPEC. 3.32 OF VIRGINIA EROSION & WATERSHED PROTECTION LANDSCAPE BEAU77FICA 77ONDUST AND POLLUTION CONTROL NOISE REDUCTION, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS SEDIMENT CONTROL HANDBOOK, 3RD ED.) BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. n ROSIO7�TONTROL NOT /� r Source: Va. DSWC L7 l\IiLI S 339 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL17ION AND CONSTRUCTON ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE W17H THE VESCH. ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES-7:ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL 77MES DURING LAND DISTURBING AC7WTIES AND DURING S17E DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. ES-B.-DURING DEWAT£RING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES-9: THE CON7RACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTCES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA7ONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-27HE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACT70TY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. £S-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP /N CLEARING. ES-4:A COPY OF THE APPROVED EROSION AND SEDIMENT CON7ROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES ES-5.-PRIOR TO COMMENCING LAND DISTURBING AC77W77ES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CON7RACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO 774E OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 1992 3.07 1992 STONE 70' MIN. CONSTRUCTION ACCESS 3* SM-2A ASPHALT TOP COURSE EXISTING G272% AV NT 6' MIN. 21A AGGREGATE BASE PROFILE STONE 70' MIN. CONSTRUCTION ASPHALT PAVED ACCESS A WASHRACK EXISTING 27 2% PAVEMENT �2% 12' MIN.' I -^ POSITIVE DRAINAGE MUST EXTEND FULL WIDTH LJ TO SEDIMENT OF INGRESS AND EGRESS ` OPERATION TRAPPING DEVICE PLAN 12' MIN. POSITIVE DRAINA' I 29. TO SEDIMENT TRAPPING CI'."' FILTER CLOTH SECTION A -A _a ntiniminu water tap of 1 inch must be installed with a utiliunuu I inch ballcock shutoff vah•e stlppl ittg a wash hose with a diameter of 1.5 inches fof adequate constant pressure. Wash water must be carried away from the eutrutce to all approved settling area to remove sediment. All se(buntt shall be prevented front o., et t � 1 h nn dravt.. ditche • or Tcatel eL m e, Inv_: n PAVED WASH RACK NO SCALE GRAVEL CURB INLET SEDIMENT FILTER _1 GRwKL BLTER• tY RUNOFF WATES WIRE MESH FILTERED WATER I e = sEDINEM 9 > ° COICRETE GUTTER 12 CURB INLET SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENI3NCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. • GRAVEL SHALL BE WOT AS. #357 OR 5 COARSE AGGREGATE. Source: Va. DSWC Plate 3.07-2 Source: Va. DSWC 1n-36 m-41 1 SET POSTS AND EXCAVATE A 4 X4" 2 STAPLE WIRE FENCING TO 3.07 1992 3.11 Plate 3.07-6 Source: Va. DSWC TRENCH UPSLOPE ALONG INS LINE THE POSTS. 3. ATTACH THE FILTER FABRIC TO OF POSTS THE WIRE FENCE AND EXTEND lT INTO THE TRENCH. I � FLOW _ I - PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL 4" EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE Source: Va. DSWC SUPER SILT FEN CACK5 EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE SSE. (WITH W/RE-B IMMEDIATELY. NO SCALE 111- 62 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. FLOW G r EXTENSION OF FABRIC AND T WIRE INTO THE TRENCH. 05- Plate 3.11-1 No. 35791 11/6/20 VJ Z Z J O ¢ O a �_ 2 2:U m wZD to � J z O H Lu C Lu ~Ice 0 z ul z J J U M M m N M 1 N N N Q Lu J ! J^^ U) Lu _ Lu W Lu Lu LL U) Lu O C) N RE z J ^ I^p.L I�CL G Lu Lu `f z Lu J m J a Lu 0 W Lu v L L] O z z O z G 0 Cl) 06 O Cl) O L L] I Io Iu=il Lu �i 182154 SCALE N/A SHEET NO. 14 ft —_---------- _----- - / / A— — — / � w ----- _ LIMITS OF DISTURBANCE APPROVED — /" \ PORTION OF EXISTING EMERGENCY ACCESS �w \\ /' - __7aa - ---- —7 — — _ --- - - - - - - ----------- _ --�32-- --- ♦ r ROPERTY LIMITS (TYP.) // / WITH WP0203.900003 , / w TO REMAIN DURING THIS PHASE SOILTYPE ) _ _ - _ — — _ _ _ - --- r / — w w w �� i,% - - _� B - —PROPOSED LIMITS OF DISTURBANCE TYP. w �' 7 / / v - — / _ (TYP) w � /CONTRACTOR SHALL INSTALL —, — / / / �' � / / i � � —w — — — — RIW DIVERSION ACROSS THE ; -' i _ --M ------ .. — —' / / / / _ 1 _i / / / w w ' CONSTRUCTION ENTRANCE. NowiNow D H —� t S �l PHASE I DRAINAGE s �_ /-x!� / AREA TO SEDIMENT - SF / _ �' � TRAP A = z.zo ACRES � / ❑` _ / / / ,-� // a / PROPOSED ROCK WEIR OUTFALLrI CONTRACTORSHALLUSEAPO IONOFTHE XISTINGEMERGENCY �,: / ot�+ _ 5- `E,INLET TO EXISTING DRAINAG / ACCESS ROAD FOR THE PAVED CONSTRUCTION ENTRANCE. V / CONTRACTOR SHALL INSTALL A WASH RACK AND ENSURE A' _ _,n „ ' _ - MINIMUM iz'x7o'PAVEDAREA FOR THE CONSTRUCTION ENTRANCE. L �J _ / ° `*AV* m Elm / / 6 - PROPOSED ROCK PROPOSED CONTRACTOR/' �ft* ti -x�` WEIR OUTFALL ' STAGING AREA 9QP 0000 12'X70' MIN. W/ — — _ J CULVERT TO Qsc) ' ♦ WAS RACK LC ENC ♦ i 9 SF BE REMOVED PROPOSED CONCRETE WASHOUTAREA SCOTT/R. CbLLINS'Z No. 35791 11:- pow 11/6/20�� �'SIONeT. E�O� DRAINAGE DIVIDE (TYP. LOCATION OF ' / y/ / / . PORTA-POTTIES ° � V � �� / SOILTYPE �\ PROPOSED18 DIVERSION. A ° / / ° �� A\� V �� / �5B J /'\/ // �7 ' r- LOCATION OF- _ �g8� CONTRACTOR SHALL ENSURE ( iS CY DUMPSTER POSITIVE SLOPE IS MAINTAINED. \ ! I \ Jsb" C`O - / -'� / / h� \ O v m LIMITS OF DISTURBANCE APPROVED / - BERM SHALL BE STABILIZED AS // ! vv A A� tij� / - _ - _ _ 1 v L�"/�� w Ln \ WITH WPOz01 0000 / A FIRST STEP IN DISTURBANCE. / , \ - - - _ - _ - - - _ ,�//� �. \ \ V% z ¢ UCTIONTRAFFICSHALL �V v v 9 3 / // v <i v RSITEACCESS / LOCATION OF --_ ° - / \ \\\\ ,ST'PFT� - / �f _ \ o / \\ /-FUELING AREA CULVERT TO THE FUELING TANK SHALAE COMPLETELY SURROUNDED BY / / / \ / �v v \ i M % /I I / / / A z' DEEP, z' WIDE EARTHEN BERM WITH A HEAVY MIL v ° / ! / ° V v � \: / LLI BEREMOVED �/ // // /-POLYETHYLENE LINING, ORBEPLACED INANIMPERVIOUS lO N v� / / OPEN -TOP DUMPSTER WITH A SIDE DOOR. THE PROPOSED / / J BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS �, / / A A \ • \ / } / io96 LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. / ,\ \\ \ SF v ,' / EXISTING CUL-DE-SAC / / / w A �\ i/ i' / \� TO BE REMOVED SANITARY SEWER i W TO BE REMOVED // // // // PROPOSED 18" DIVERSION. CONTRACTOR SHALL ENSURE i /' POSITIVE SLOPE IS MAINTAINED. � // / A BERM SHALL BE STABILIZED AS/ / I P/LU / _ _ i / / /' // / //� // / ,cam/ ! AFIRST STEP INDI'$TURBANC // / //�+ V / a // / // �IP / // LOT SOILTYPE / PROPOSED STOCKPILE AREA TO BE V ♦ pR�VP1E 1 i 14 25B / /' / / Y ENCOMPASSED BY SILT FENCE AT ALL TIMES 27,pRNATESTREE LOT H CD ¢ `o o SF - PHASE I DRAINAGE SOILTYPELOT AREATOSEDIMENT - 7B // // / / // _ vv / //�-v / ---� _ - v\ i6_I BASIN C=10-83ACRES _ -- // // / / / v / / //r v � _ _� I LOT 1► �.,, �i/'/ // \v - A /— /' // �/ _ A i/ LOT (�ri --44fr / \ ---- / __/ / �' —� / �'' ��� --I I I •=2j , I / /aft (`4 i] --i ---__ PHASE I DRAINAGE i / / / / _ I / _ M AREA TO SEDIMENT /' / /' / — I• LQT PROPOSED SAFETY FENCE -' - / `� I / / V A / ' / v � BASIND=6.1 ACRES INSTALL SIGNS "WARNING \ \ ` EXISTING TREELINE (TYP.) 4 QUICK SAND, KEEP OUT" SAF -r /� x / / / v A // / / /' / A ♦ I � / A v --- -- ----- / / / / / /� �� �/ / / LOT / / M _ - / / / ! I A -----' �- / /� / / �// l l I / / LOT 27 $m - _ ---_ / PROPOSED i8" DIVERSION. \ i / / / / / / / F - ! / _ - - CONTRACTOR SHALL ENSURE i/ \\ / ''' / '/ ' / / SOIL TYPE/ j �---- / A v . TP 7-32— -- / v / �' i //iv7 sv LOT , / LOT 0 POSITIVE SLOPE IS MAINTAINED. / /� / I SOIL TYPE v _ �P Y SOILS LINE (TYP.) /' / / / / / / /' / / / / / / �'� \ — z8 3fjD/! �9 BERM SHALL BE STABILIZED AS / / / / , - - OA FIRST STEP INDISTURBANCE. / I 8C3 _ LIMITS OF DISTURBANCE APPROVED / WITHWPOzoi900003/ / / - / / / �� / �/ - �Q / -� L i �� / /- � � � / -- / - ��� / � EXISTING PLEASANT GREEN zo / -----_ _ - - - / W Q J J _ '�-b PHASEIDEVELOPMENT \ Q - �T PI{OPOS�D BAFFLES I -------_ _ � / V � 1 � i � // �// i // LOT >Lu -- / - ---- / O �LOT Lu� - - - - - - ------ WPROPO�ED18'DIVERSION. 23 as /CONTRACTOR SHALL ENSURE POSITIVE SLOPE IS MAINTAINED. / / � / / �/ / / / 3 / / / � q O � D BERM SHALL BE STABILIZED AS / / / / /� �, / 1{ \ // Lu AFIRSTSTEPINDISTURBANCE. PROPOSEC D. CLASS Al R-I/PR-A-P- LINED / F /I/ 4yA6 . / / Z W OUTLET PROTECTIONLWITH FILTER FABRIC SOIL TYPELu -8'W D=i8") uj/ UNDERiAYMENT(L = \ek XISTING1oo'WPOBUFFER (TYP.) / W SED SAFETY CE, WARNING W - - - - - - - - INSTALL SIGNS -TP - —/ -' - XISTING WETLANDS- QUICK SAND, KEEP OUT" p ' V ® �v��� 7 L / vJ OIL now 1 - Lu PROPOS FLAT VDOT CL. AI RIPRAP LINED - / \ s - ' 4 EXISTING ioo YEAR FLOODPLAIN (TYP.) � / T , W W — / - SEE SWM PLAN FOR- OUTLET PROTECTION WITH FILTER FABRIC /- FLOW DIRECTION ARROW (TYP.) -- J\ ' UNDERLAYMENT (L=z5', WI-4^5' Wz-u. , D-i8") ! �. •� _ _ �` / \ 5 / LOT /r w OUTFALL DETAILS -' \ /i — — / / .�� \ T \ - _ 49 \L /' OP v vv / � \ _ - //' PROPOSED LIMITS OF DISTURBANCE (TYP.) �� \\ vV LOT (�Lu LU TURBANCE(TYP.) / / / -----I EXISTING / ` \ \ \ 50 J SEE SWM PLAN FOR LEVEL r _ / SPREADER DETAILS \ � - - - - - _ _ _ - _ \ - - - TING ioo YR FLOODPLAIN PER ---- --_- EE CLEARING (TYP. ? i� /) / SOIL TYPE \ \ - ' \ HEC-RAS ANALYSIS PERFORMED \ \ \ \\ \ \ \ \ LLI 17 - --- _ BY COLLINS ENGINEERING IN V / / A -�`--J - APRIL202 SEEWPOzoi 0002 / v v I V A \------- , \, 9 ]) .� \ OP � �• I I _ SOIL - -1 '0010�_ i \ EXISTING STREAM \ Q \ _ PROPOSED VID LASS Al RIP ED / _,-- / i �� �I / \ �\ _ \ / \ I \\\ \ \ _• OUTLET PROTECTION WITH FILTER FABRIC / 1 \ _ _ - - \ \ \ `\ \ \\ OW - - -- _ PROPOSED LIMITS OF TREE CLEARING (TYP)_// TYP) \ \ uNDERLAYMENr L=6', WI=3', wz=g', D=i8") '/ /' --- E� o 1—TP -GRAPHIC SC _ _--------__ 007� _ �za 40 ieo II I III II \\\ \ � _ w -foo SEE SWM PLAN FOR a -_-_---___- SOILTYPE i, \ — -/-INFEET-` \ \\ \ OUTFALLDETAILS � \ \ � �\ � � \ \ \ \ /\ \ � i I JOB NO. i/i _� _------ _\ _-- -- i/�/--------! \I w = \ \ ` ` `__= 1 ineH_\40�ft\ \ \ \\ \\ \\ \\ \\ \\ OUOPOSETLET F' CTIONTWITHIFLTERFABRIDC ! ` `y,.. \ \ \ \ PER ANALYSIS \ \ 182154 ` a _ -- - V A A A � � x\ � \ OP \ PERFORMED BY � / � � � � � 1 � V A A V � A \ I DERLAY■MyENT(L W 6' Wz 6',D 8" r A V SCALE t--_--_ --- \ _ ---_-- ---- J_ \\ \ \ R I = \ ENGINEE9ING�NAPRIL oig,SEE / O �� \ \ \ I // SEE SWM PLAN FOR LEVEL a 0 \ I I I / / / v / '� \ V v / WPOaoi 000z Oo� 1 =40 / I °q \ ° I I / 0 \ e `\ SHEET NO. ��I, ! -7 � SPREADER DETAILS 1 1 dC� OO 15 -- ------ 1 -- OOOoOo 1\1 o II Oo I SOIL TYPE,/ vv 713 W WON p // ------ RPA�ROPp SCOTT/R. CbLLINS'Z we aft No. 35791 ,� � m aft am aft_ - �I // `6 11/6/20 �I�� \ to aft O 100 to / 00 V / NOTE: NO CONSTRUCTION TRAFFIC SHALL FOR SS / ,-- �100- ' v USE CLING LANE SITE ACCESS to 100 Z o Ln w to00 Lu ' , C T r -X� / Lu O/ .,� ti v v / / J i 40 1 PHASE I DRAINAGE AREATO SEDIMENT - L /// / // / /ru // / v // /// �O�/ s ��% BASING=1o.83ACRE5 0 O/ 010 / / - _ / G O P� tREE� I N R8G so �6�6 EX6�5 PtE� \%'/ // \ // / 5 / / SOILTYPE �`� �� PROPOSED SAFETY FENCE, ' / INSTALL SIGNS "WARNING S A L9 40, /' '� `�B � ' QUICK SAND KEEP OUT / --- - _ O `—_ —_ #e — BM_ ti � M /�O' RAINAGEDIVIDE(TYP.) M O ' / \ �� �� \ \ / � � � // LOW DIRECTION ARROW (TYP) s // / / ' � / -��- / / / i � --T PR � / O / , EXISTING MANAGED �'' / M STEEP SLOPES (TYP.) O �� \� _ A O '� / - _ _ - PROPOSED 18" DIVERSION. / / \ I / c\I CONTRACTOR SHALL ENSURE ' / PROPOSEDI8"DIVERSION- SB / O \ / // \ - _ /' S/ '/ / / // / POSITIVE SLOPE IS MAINTAINED. D / / CONTRACTOR SHALL ENSURE / C / / / \ -' - _ :R0CP6SED,.8-DIVEI / / / BERM SHALLBE STABILIZED AS / / POSITIVE SLOPE IS MAINTAINED. / / /jyg- N%> SION. / / / i�I'/PROPOSED LIMITS OF DISTURBANCE TYP.A FIRST STEP IN DISTURBANCE. ( ) S BERM SHALL BE STABILIZED AS CONTRACTOR SHALL ENSURE / / / / / A FIRST STEP IN DISTURBANCE. POSITIVE SLOPE IS MAINTAINED. / / / �' / / / _ _ _ _ _ 000 _____ _ BERM SHALL BE STABILIZED AS ' / ' s6 / / / / DD / A /' _ -� // S� �� AFIRSTSTEPINDISTURBANCE. // /' 1 / // / / ' Lu SOIL TYPE DD' B // PHASE IV DRAINAGE — / AREA TO SEDIMENT BASIN B = 4.35 ACRES _ / 'EXISTING TREELINE (TYP.) /' /' /' /' / / / / ' / / / / // - " W / elf PHASE I DRAINAGE 010 ///// /' _ — ------i48- AREA TO SEDIMENT ' TRAP=z. ACRES ----- _-- ---- / — / PROPERTY LIMITS (TYP.) / �'' // / ♦ � — i -93 - �� / / - _-- - - --- N� / - I_, Lu '� '' /' -_ /_-__-------- �k / / / /' '' -' I / / / / ' PROPOSED LIMITS OF DISTURBANCE (TYP.) PROPOSED SAFETY FENCE, ` `- ,I,�o / / / / / / �INSTALLSIGNS"WARNING ' _---- O -----� / / / / / / / / / / / '------------- / / / , , _ _ _ , _ _ - -' _ QUICK SAND, KEEP OUT" SAF / / // ' // ' / / PROPOSED LIMITS OF TREE CLEARING (TYP. 00 ul _---- --- i ~ / ��' / B / // / / // / // / A\ Lu EXISTING PRESERVED �ROPOSED SAFETY FENCE, /�goo /' / ' / /' _ �" // F / STEEP SLOPES (TYP.) INSTALL SIGNS "WARNING SAF QUICK_ SAND, KEEP OUT" .' / / ,-/ --�' '' SOIL TYPE-----~/� —4 i / I / N F /' �/ /�/ /' �/ VJ � � � 8C3 _ -_ �® � � --- „o/ //� XfSTING loo' WPO BUFFER (TYP.) ` /- �� ,/ / - � � ✓� _ -- //'/ // // PROP6SED18"DIVERSION. ' /' / �// / - -`_-/' -- �_ / / / A---- ' \ ' / / CONTRACTOR SHALL ENSURE _Lu / P SED BAFFLES §2' A V / - - -° /POSITIVE SLOPE IS MAINTAINED. s ' S / / // / BERM SHALL BE STABILIZED AS /' / I / O / PROPOSED LIMITS OF DISTURBANCE TYP.) _ �N A FIRST STEP IN DISTURBANCE. / I � � (TYP.) N / // -- '/ --- / / / i �/ \ - ROPOSEDROCKWEIROUTFA�� \ Q ��— r DD // / r' /� �, — — — — - B ftft��' ' ROPOSED LIMITSF TREE CLEARING (TYP.) _ 0 0 O O ofto son// _tom / _ PROPOSLDVDOTSTD;CLASSAI IPRAPLINED % / XISTING1o0-YEARF WON LOODPLAIN (TYP.), EXISTING Zoo' WPO BUFFER (TYP. / / / O _ GRAPHIC SCALE ,,,r.--/ / / OUTLET WITH FILTER \/ - --LSE- — — — — — — — — jr �` / // /' /' / OP UNDERLAYMENT(L-S, Wl-3, Wi-�, D-18) / xz ago 40 0 20 40 e0 // � 160 / � / A 1 \ i // // // r l Azoo TPwoo ,TP � ► 3s3---- - \ \ - / / SEE SWM PLAN FOR LEVEL / / SEE SWM PLAN FOR / SPREADER DETAILS / EXISTING STREA 40 --- / / SF ► EXISTING loo-YEAR FLOODPLAIN TYP. \ s ' / /' / OUTFACE DETAILS SOILS LINE (TYP.) ROPOSED LIMITS OF DISTURBANCE TYP.) ' ' / SOIL TYPE —PROPOSED LIMITS OF TREE CLEARING (TYP.) ( / ,' / / // OP / /- --EXISTINGloo-YRFLOODPLAINPER 17 ---/ I--- - / / /EC-RASANALYSISPERFORMED ���� / / PROPOSED FLAT VDOT CL. AlAI �PRAP LINED / _ OUTLET PROTECTION WITH FILTER FABRI = ' / BY COLLINS ENGINEERING IN /i / / // iUNDERLAYMENT(L-1',WI= W2-8. D--18" ---_- /' APRILz019,SEE WPO201900027) z g J � ^� 0 0 Lr) U Lu � z II L W Lu LU ur) ck. (D z 0 z a ° Lu h-1 W LU J U) a U w JOB NO. 182154 SCALE 1"=40' SHEET NO. 16 r PROPERTY LIMITS (TYP.) / IN \ — —REMAINDER OF EXISTING EMERGENCY ACCESS ROAD TO BE w ��° — / PHASE II DRAINAGE REMOVED ANDRELACEDWITHPAVEMENTATPROPOSEDGRADE - ----- / LIMITS OF DISTURBANCE APPROVED — AREA TO SEDIMENT / / _- - - - _ - - _---- _---3�----nn — WITH WP0203.0000 / -- --- r- 9 3 TRAP A = 0.47 ACRES—wOSETS OF DISTURBANCE (TYP.) ��w/CONTRACTORSHALLINSTALLR/W DIVERSION ACROSS THE / i C M - - / / '� \ / - ' / ONSTRUCTION ENTRANCE. /°'� y - - nowix IPD m // SF CONTRACTOR SHkLL USE A PORTION OFTHE EXISTING EMERGENCY '.:, .,r - / - S w=Jam' \ a TO EXISTING DRAINAGE INLET T t / ACCESS ROAD FOR THE PAVED CONSTRUCTION ENTRANCE. CE r` - L — _ — — DC / CONTRACTOR SHALL INSTALL AWASH RACK AND ENSURE MINIMUM 12'x70' PAVED AREA FOR THE CONSTRUCTION ENTRANCE.' PROPOSED CONTRACTOR/ / STAGING AREA PHASE 2'x7o MIN. W/— R_ACK SF / ° A .. � I / / PROPOSED CONCRETE LOCATION F WASHOUTAREA PORTA-POTTIES PROPOSED i8" DIVERSION. , \ \ A' l ' / \ I / / / Z / / / LOCATION OF- _ - �d8� D CONTRACTOR SHALL ENSURE \ / I ° ( \\V -r/�. - f / �' / ' / I' ( a is CY DUMPSTER POSITIVE SLOPE IS MAINTAINED. r' I \ J.b, CO - / , / yy U m / BERM SHALL BE STABILIZED AS // !' AV A A� -- --- - /� I , �� L H p Ln LIMITS OF DISTURBANCE APPROVED / \ 2! w 1n UCTION TRAFFIC SHALL \ WITH WPOzoig00003 / / A FIRST STEP IN DISTURBANCE.Ja RSITEACCESS \ / / LOCATION OF ° --' / \ \ �S,TPF------------,'','' /-FUELING AREA -- i \ / / THE FUELING TANK SHALAE COMPLETELY SURROUNDED BY ° // / I /� , \ \ \ M -� —� `M _ 7�4- -,- W A z' DEEP, Y WIDE EARTHEN BERM WITH A HEAVY MIL ° , / \ _ / ,\: \yV I AV //' / ///'POLYETHYLENELINING,ORBEPLACEDINANIMPERVIOUSM_�—M� i �` •� OO TS / / / / OPEN -TOP DUMPSTER WITH A SIDE DOOR. THE PROPOSED / J BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS - / , \74M WN 2.o% LARGER THAN THE MAXIMUM VOLUME OF STORED FUELLLI . DC LLJ _ /// DRAINAGE DIVIDE (TYP.)' �aa- � / // // y➢ ''-- -- / / PROP SEE _ \i / AVERSION. IVERSION. I , / y u CONTRACTOR SHALL L/ / D � ' � // � / // , � // / / /' ALL ENSURE POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABILIZED AS / I P / w �� // / „�.,/ // AFIRST STEP INDISTURBANC / , / // �. N v / / / _ IP — L I _ _ P,,A PROPOSED STOCKPILE AREA TO BE / / ` ENCOMPASSED BY SILT FENCE AT ALL TIMES / / I P 1, pRNATE Q ' z 4 DC --------/ /' / /-------�3e -- PHASE II DRAINAGE PHASE II DRAINAGE ' / / _ _ ,� / / SF AREA TO SEDIMENT // z/ / /_/--_- / - � - _ __ _ �, ,�--_--_, -- - -' LOT Lu AREA TO SEDIMENT _ SLOPES GREATER THAN 3:2 SHALL BE PLANTED WITH NATIVE STEEP SLOPE // / - `\ 16 BASIN D = 6.o6 ACRES v / BASIN C =13.71 ACRES MIX WITH ANNUAL R, OR 2 L S BY ERNS2,000 CONSERVATION SEEDS AT ARATE OF _ ' - , 6o LBS. PER ACRE, OR 2 LB PER z,000 SF, UNLESS SPECIFIED OTHERWISE. _ I \ /' / �/ // / /� \ PHASE II ��,' ' // // / // I I, I_... LOT / / ®RSI.POSED SAFETY FENCE, _ - - / / `� / / , i _ ' ' INSTALL SIGNS "WA i' �+ \ z6 QUICK SAND, KEEP OUT" SAF - - - �- / // / / ) A ��------- // / // , ��.�� , E II /'' / �.... LOT I //I I M / - / J /� - --- _ / / I \---------- --- / / / �' / 'L /' �. l' I / / I� LOT - - _ ,�- i 27 PROPOSED 18" DIVERSION. / A V ' / , / // / / // / i l ' r SF� ! _ l I / / I j� / N z B - CONTRACTOR SHALL ENSURE / / \ z--- /' ' / - / / r POSITIVE SLOPE IS MAINTAINED. / / / \ TP ,' / /' ' /' / /' / / s' V LOT / / / / / / LOST Q \ \ BERM SHALL BE STABILIZED AS / / J SF � � LIMITS�FDISTURBANCEAPPROVED A FIRST STEP IN DISTURBANCE. // / / ��� i �' WITHWP0202900003, /� / / �i�4� j 7 / / N f - v _ EXISTING PLEASANT GREEN --IT9- ---1 DD ----__ / — — — / / / / / / / ��� - PHASE I DEVELOPMENT 20 W Q O -T PROPOSEDBAFFLES ---- - / / // \ 1 �' / /� ,/ / /' /// / �0 LOT W z LOT v � r \\V // �� > U LOT PROPOSED DOT STD. CLASS Al RIPRAP LINED / - - / f i ROPOS`ED z8' DIVERSION. LLI > OUTLET PROTECTION WITH FILTER FABRIC / / / / / / / - - - _ _ _ /' ' / /'CONTRACTOR SHALL ENSURE�4 z UNDERLAYMENT(L=8',W1=3',W2=9',D=i8") —� / / \ _� ---- ---_-- / /// POSITIVE SLOPE IS MAINTAINED. s \ / 4 \ y Lu BERM SHALL BE STABILIZED A FIRST STEP IN DISTURBANCE.IP/ / TP �- ....« _ 7 Sz - / ' - v / _--- XISTINGioo'WPOBUFFER(TYP.)� -------------', — �� w _ �` P14 P W ( z - PROP -SED SAFETY ' /' �' — /' INSTALL SIGNS "WARNIN IW f XISTING WETLANDS QUICK SAND, KEEP OUT' ! M b p n F v� / A V / OIL E / / Lu PROPOS FLAT VDOT CL. AlRIPRAP LINED �/ -\\ ,'\ , + - W L - " _ - _ _ _ \ EXISTING Zoo -YEAR FLOODPLAIN (TYP.) i \�\ T Lli / SEE SWM PLAN FOR ul 0 OUTLET PROTECTION WITH FILTER FABRIC / / UNDERLAYMENT(L-25', W1-4.5' Wz=z2. ', D=z8") FLOW DIRECTION ARROW (TYP.) z h-1 LOT I --I 4 OUTFALL DETAILS / \ — — — / / '�� \' - 49 _ \ PROPOSED LIMITS OF DISTURBANCE (TYP. � , � � \ �\\ � \\ \ LOT � (n � w SEE SWM PLAN FOR LEVEL \ _ _ _ TURBANCE (TYPJ SPREADER DETAILS -� / / ' - - -- - --_ __ - - _I / - 50 EXISTING loo-YR FLOODPLAIN PER Q -RASANALYSISWEECLEARING(TYP. Z BY COLLINS ENGINEERING IN APRIL202 ,SEEWPO201900027) \ OP --,, PROPERTY LIMITS (TYP.) EXISTING STREAM / a� �/- v v A �� �� �' / Q \ PROPOSED VD0 SD. LA S AI RIPR ED \ i / / � � � � VA \ \ �. OUTLET PROTECTION WITH FILTER FABRIC A v - ' /'�' /��� / \ (UNDERLAYMENT L:8', Wi=3�, W2=9�,D-18") _ / /� O - LIMITS OF RIN ( — N \ � � PROPOSED L TREE CLEA G TYP.) \ / v vI wEL{S CREEK � / / /' , � r, o - - - - -- --- --- - _ _ 'GRAPHIC `SC r - - - - - - \ �Y \20 40 �80�� �- 160� 1 1 11 A �- - _ SF tu / --- � — — / — �� --- \ PLAN FORm - o w / --'--------------- � \ — — — A \ / - - - - ♦ (IN E�� v vv v ESWIvLLDETAILS - �4y1 1 x - - - - - - - — \ \ 'SEE OUTFACE DETAILS r \\ \ SOIiTYPE a m ---- \\ \ \\\ \\\\ - _ \ \ - - - - \ - \ \ \ \ \ \\ \^ \ OUTLET PROTECTION WITH FILTER FABRIC / \ `� \ PER HE�C-RAS ANALYSIS_ 7 JOB NO. ` - - -- PLAIN PROPO ---- \ i _ \\ \\ \ \ \ 1 inch 40 ft. \\\ \ \ \ \ \\ \ \I UNDERL MENT(LPROPOSI FLAT D9'TWs=6I,WzR6'PDN8D�P ` PERFORMEEDBYLD \ 182154 ------ _ COLLINSI\/ \ SCALE _ ____ ----- \ \ ENGINEERING INAPRIL2ozg,SEE / \ � Oho o �\ 1 =40 SEE SWM PLAN FOR LEVEL O WPO zol900027) I O�� ? _ // SPREADER DETAILS �p v C O 5 SHEET NO. - - - �o--------- v - / , �o I O �� LLc ' \ 0 0 0 p l 17 OSCOTT R. LINS'Z u No. 35791 � w���r���� / - / 011/6/20�� / _ aftSIONALgo 4111, ER \ I 00 0 - / / 00 Aft aft I \ 11110 I _ .1 00 00 tE 40 ♦ 'NOTE: NO CONSTRUCTION TRAFFIC SHALL �� I �' USE CLING LANE FOR SITE ACCESS I A 1 I ' Vl � ` \ / TS I I � v 1 I // � z -� / / j _ I U co /yam r Ln WLU Lu \ C - Lu Lu ce Lu Lu r k, A / / r / ray / �/ � �� �/ �/ ♦ '' \ / / %� / /' , v / PHASE II DRAINAGE ♦ v I / /' /' `�v / AREATOSEDIMENT Lu N / Xp/ BASIN o OpOtRE� �� / / / �/ r B C DC 00, ROPOSED SAFETY FENCE, INSTALLG"WRNIINS N G QUICK SAND, KEEP OUT"L9 S f7 RAINAGEDIVIDE (TYP.) M / / V ♦ , / / S \ \ \ \ \ / 00' ' \ LOW DIRECTION ARROW (TYP) o /Pf� A \ / / / / // / --/ / // _ / I� / d EXISTING MANAGED r ♦� ,' �\ 1 V \ / // // ' // STEEP SLOPES (TYP.) � ' (\\ ( � / / ��\ ' //(:S!IB) CD < \ / / \ PROPOSED LIMITS OF DISTURBANCE (TYP.) - %' / / f- N 100- / ♦ i SLOPES GREATER THAN i SHALL BE PLANTED WITH NATIVE STEEP SLOPE / / / / / / — — — i -Lu MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT ARATE OF /f TS/�S / 6o LBS. PER ACRE, OR i LB PER i,000 SF, UNLESS SPECIFIED OTHERWISE. O PHASE II DRAINAGE AREA TO SEDIMENT ( ,; --- / / '�--- > U BASIN B=5.24ACRES / //'� /// / �'/I / '� / /' ' /'� /' / U) / r / — W ♦ / �� / / / -- ter' / / / / /�/ -- :...-- �/ /' / .. � Z Lu / D � z / DC !� �/ r 0 i/ ' k� `'� PHASE II DRAINAGE PROPERTY LIMITS (TYP.) / ' � � � _ - � ,, ,, _ �' / / ----' / — --- --- AREA TO SEDIMENT /// r ID r r / W TRAP / /-----%, zO S�/ �� ' ''- ------ _ - / / / / /' /' ' PROPOSED LIMITS OF DISTURBANCE (TYP.) r-I / / _ (� PROPOSED SAFETY FENCE INSTALL SIGNS "WARN IN / / / / / / /' / / ' ------ U z QUICK SAND, KEEP OUT" - / / /' / TP ,' / /' / / ul 0 PROPOSED LIMITS OF CLEARING A TREE(TYP. ELu XISTING PRESERVED �ROPOSEDSAFETYFENCE, / / /� / ' / �,- gr' _"� / F / / H STEEP SLOPES (TYP.) INSTALL SIGNS "WARNING SAF / / r' — I �"� / / \ / QUICK SAND, KEEP OUT"W XfSTING ioo' WPO BUFFER (TYP.) / / U) (f) 7'� / �/ / / / ,--� /� �// r' PQSEDBAFFLES / PROPOSED LIMITS OF DISTURBANCE (TYP.) TS ' / - I /� � �� /v PROPOSED ROCK WEIR OUTFALL vIli Q 'ROPOSED LIMIT F TREE CLEARING (TYP.) ,1 XI TIN i -YEAR FL DPLAIN TYP O O XISTING o0 00 ( j N / r / PROPOSED VDOT STD. CLASS Al RIPRAP LINED \ GRAPHIC SCALE EXISTING too' WPO BUFFER (TYP. / - / OUTLET PROTECTION WITH FILTER FABRIC IS"\ / / � � / , // // / � OP UNDERLAYMENT(L-8,W2-3,W2-D-28) , xz v40 o zo ao eo // / +eo --- - \ _ , / ,- // SEE SWM PLAN FOR LEVEL / /' EXISTING STREA ( qp _ ,' / / / / o tu SEE SWM PLAN FOR / SF SPREADER DETAILS / // / / _-1 i / / / / a m OUTFALL DETAILS / / / _ _ r / / / / EXISTING ioo-YEARFLOODPLAIN(TYP. JOB NO. 182154 IY ' /� ROPOSED LIMITS OF DISTURBANCE TYP.) ' /' /' / / --- - / SCALE -PROPOSED LIMITS OF TREE CLEARING( / -, / / ( / r _ _ / j /' ` ——/ v' \� / 1—g / / _� / / OP / /---EXISTING zoo-YRFLOODPLAINPER� /' ' /-� `-- / __----—' / 111=40' _ — — —' I ���\ /� / /; —' / ,' / __ PROPOSED FLAT VDOT CL. Al M-PRAP LINED ,' HEC-RAS ANALYSIS PERFORMED S Ai/ / OUTLET PROTECTION WITH FILTER FABRI = _ / / BY COLLINS ENGINEERING IN , SHEET NO. iUNDERLAYMENT(L-1 ', Wi= Wz=8. D=iB" — -- _ /' APRIL zoi9, SEE WPO zoi9000z7) ' _ / / / — — — — ------ / / LIMITS OF DISTURBANCE APPROVED — iSE III DRAINAGE ROPERTY LIMITS (TYP.) /' WITH WP0203900003 AREA TO SEDIMENT —PROPOSE TS OF DISTURBANCE (TYP.) w �w w TRAP A = 0.25 ACRES w � ' / I _ PS �\PROPOSED CONTRACTOR/' STAGING AREA CE 71 / \ / ✓ WASH R CK - Yv SF (w - _-----_ ,{ — — — — -/ \ ---- -3�- --------- - — _-------------- ---- w _ as -- _ — ae — \ �_—3�---- TH OF _-- -- r SCOTT R. LINS'Z r-) No. 35791 � 11/6/20 NND � � / f 1 \ \PROPOSED ROCK WEIR OUTFALL ��•' / -' //� TO EXISTING DRAINAGE INLET / x a ° p PORTA-POTTIES- a a a / i 0 J / 0 LOCATION OF- _ as �- _ a v -_� -ham a iSCYDUMPSTER / �\ r ♦ S'6. '\, ' I u m ' - LIMITS OF DISTURBANCE APPROVED /' 1 // ♦ f' \ vv v °(��2/ -- -- ,- /''/ / `� L o % UCTIONTRAFFICSHALL WITHWPOzoig00003 I / <i'�j ------ /'/, ti ` V/ a �Af RSITEACCESS ,' r LOCATION OF _ I a -- �+ OAT�� — — — — — — — _ _-- / �� \ o F- / / /FUELING AREA --,', - a \ \ PFFF%------- a \ > THEFUELINGTAN SHALL BE COMPLETELY SURROUNDED BY\V Az'DEEP,z'WIDE EARTHEN BERM WITH A HEAVY MIL v J� / \ M /-POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS 1 \\-- --__ ' \ �I \ \ \\\\ I M —_ M� / ✓ / `'� OPEN -TOP DUMPSTER WITH A SIDE DOOR. THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS zo%LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. / v / W " - 1 - ' SLOPES GREATER THAN 3:z SHALL BE PLANTED WITH NATIVE STEEP SLOPE - - ' I / J SF \ _ MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS ATA RATE OF 6o LBS. PER ACRE, OR z LB PER z,000 SF, UNLESS SPECIFIED OTHERWISE. IP P ✓ / , / /PsLu CD I f PS /,." - �1EA��EY PROPOSED STOCKPILE AREA TO BE /� — - - T — IP IP / / r; v _ IP v pR�VP / A .', //� /:• / /� � � ENCOMPASSED BY SILT FENCE AT ALL TIMES '\ / /' / / � PRIVAJESIREE --- ✓ \ � . / / :. / /S i -_ _ .-- $ 2� _ - —=`- LOT --- PHASE III DRAINAGE / / L - �5 / _AREA TO SEDIMENT BASIN D = 4.51 ACRES ' ! / / -- - LOT L9 PHASE �/ f �6 - AREA TOSEDIMENT ";. i / / IP / vv PS / ,' ;• .' /r / - LOT ,� BASIN C _ 12.26 ACRES _ --- - - - / / _ , ' I I �'/ / S � ip LOT26 1 l RO-POSESAF ENCE, , •. r. -' .. _ \. IP _ _ - // / ' /' / / ! " /� / / / � ..' / / / / LOT M INSTALL SIGNS WARNING .. , - :..� _ / � _..-- �- - -,-. �-. �- - ..', � l ••� �._ / ✓ ! l(-i / / I I I � LOT QUICKSAND, KEEPSAS ,.� /./ - IP -_ lI N O Q SF - - / / / IP .. � .'•., ., . , ; ,.. , ; >• - ,. ,: _ _1 I I I I / ( -/ � � LIMITSOFDISTURBANCEAPPROVED / ! \ / / / � � / N � F �� l •' ' -_- -_ ,_ -- -- --- - ---- i - /I I / 1 I \I \ 'I / I _ '• . �' WITHWPOzoz o000 / / / ni <t \ / / / � N �z 9 vK3 / / / ,CQ- // � -'=7 L / � � J W Q O PHASEIDEVELOPMENT y •./.;.. --- � - - I I I I / / - / �..':, P / �0 / LOT /- /LuZ i` OUTLET PROTECTION WITH FILTER FABRIC U-NDE,,=',D=z8 ) x / LOT r.• j �_J RLAYMENT(W=6'Wzzz Lu ' ONTRACTORSHALLENSURE -\ / --- - -- -- \ L- _ _ � I ,'�--, � POSITIVE SLOPE IS MAINTAINED. � / // / dv�J LOZ � /'// 24 �`. \��; q � W / <<I _ _ I y L9 ERM SHALL BE STABILIZED AS AFR S 5AN CLASS AlR PRAP--LINED- - -� �,/ ---_ _ SF - _ _ _ _ - A - Lu W IP � �SF UTLETPROTECTION--WITH FILTER FABRIC --- / / / - v _--- / _ - 7 G / / ' / 4y•p� m -' _ _ - _ A �0� �( Z UNDERiAYMENT(L=8', W2=3', Wz=g', D=zB") / �' / /------- TP '' / - I / �'C vLu '------- ---- / - - ( I''► _ __// � ` � XISTING ioo' WPO BUFFER (TYP.) /' --- — _ ✓ / �` -- - - - 9 49 W �J _ _ z / _ / \ a ' _ / l XISTING WETLANDS- ,/ / /� / — / ul PROP FLATVDOTCL.AIRIPRAPLINED / / \ LLI W / L - _ EXISTING 100-YEAR FLOODPLAIN (TYP.) //\�` / S -' DD ' PROPOSED VDOT STD. CLASS Al RIPRAP LINE — OUTLET PROTECTION WITH FILTER FABRIC / - FLOW DIRECTION ARROW (TYP.)J \ / z w / SEE SWM PLAN FOR UNDERLAYMENT L=z Wz= Wz-u. D-z8") — // / •� _--/ / ,� \ NDERLAYMENT L z Wz Wz=zz' D z8" / LOT F_ /r ( 5': 4^5� \ \• OUTLET PROTECTION WITH FILTER FABRIC \` OUTFALLDETAILS (5, 9, ) _v qg PROPOSED LIMITS OF DISTURBANCE (TYP.) v A \ \ SEE SWM PLAN FOR LEVEL \ ' --- \\ _ - / \ \ \ LOT U) L.LJ W TURBANCE(TYP.) --- - ----- / / So SPREADER DETAILS / _ __ - S o '' EXISTING ioo-YR FLOODPLAIN PER EE CLEARING (TYP. / ? - - - - - - �— X - - - - HEC-RAS ANALYSIS PERFORMED \ �� \ \\ j LL APRIL 0BY 0i9,SEE W OLLINS 202ROoozING N / `n\V� B y v I I PROPERTY LIMITS TYP. a \ 9' 7) \ \ / \ \ �P \ Q / / D EXISTING STREAM - \ - (TYP.) \ / \\ \ O `� \ / L / _ / \ \ \ 'PROPOSED VDO D. LASS AI RIPR ElAIIIII \ \ / / / / / _ �� / �� \ �V A V OUTLET PROTECTION WITH FILTER FABRIC PROPOSED LIMITS OF TREE CLEARING (TYP.)� sv UNDERLAYMENT L=6', w1=3', wz=g', D=18") _ �'/ /�' --- o \ \ W Iv----_----- --- '__ --- - - - ----_ �. \ � _-GRAPHIC `sC TIP �vv _ ------ --- i ' _ --- -- -- 40 �v a �za 40 eovvvv ieo �Ol� 1 /ice / — vv v V vv Lu /---- - - - - -- - -- — — — - \ 'SEE SWM m� S - o w -IN FEET- / V A I I I I SOILTYPE \ OUTFALL DETAILS a m /\ , I I I I I I -1�\ JOB NO. i inch =-40� ft. \ \ \ PROPOSES zoo Y FLOODPLAIN \ _ f \ PROPOSE FLAT VDOT CL. AI RIPRAP LINED / \ \ _ -- ---- ----- --- vv v_-v v V A \ v A / �� A PER BZ�J� _ - � _ / � \ OUTLET PROTECTION WITH FILTER FABRIC \ � 4 - - UNDERLAYMENT L= Wz=6' Wz=6' D=28" 0� ,r S \ V PERFORMED BYCOLLINS �/' ��� SCALE --- _ GINAPRILzoz9,SEE /\ \ - �—� A V A ENGINEERIN WPOzoz9000z7) / o 1"=40' SEE SWM PLAN FCIRLEVEL SHEET NO. - - - - - _ - - - - - - I I SPREADER DETAILS/ ° II I I (� 19 / / - A OC �0°000o 40 �TH 0 v / IP ROPp—W _ OSCOTT R. LINS'Z C) No. 35791 ,ll�- Oft— aft00 4000 /A ED " NOTE: NO CONSTRUCTION TRAFFIC SHALL USE CLING LANE FOR SITE ACCESS ' 00 '� ❑ \ ' / CIP y r U co CIP -� \ \ ~ w V) Lu ILIJ ce /i 00,00 PHASE III DRAINAGE v / / / v /' ,' ��'� v AREA TOSEDIMENT a Vol / , / ,' /' BASIN C = 12.26 ACRES ltook p INSTALL SIGNS "WARNING' QUICK SAND, KEEP OUT S 100 RAINAGEDIVIDE (TYPJ _ /" / IP M Rl LOW DIRECTION ARROW (TYP.) / M \/ EXISTING MANAGED �' � / �� z \\ \ � \ ' \\ IqT STEEP SLOPES (TYP.) / // , PHASE III DRAINAGE - ----- // �� ,' �� /' AREA TO SEDIMENT // / \ »_�-- CV z vv v / / // BASIN B=5.25ACRES Q PROPOSED LIMITS OF DISTURBANCE (TYP.) Q O Lu O // Ip �� s _ u jLu / / ' ' S '. , Lu L9 /' / J h--I SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE STEEP SLOPE � Mom' - - •, .. �'� \ \ �r / '\ / , \ \ \ - � 1 z ' / / , / 0 MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF / / /' ' i' w CBS. PER ACRE, OR i LB PER i,000 SF, UNLESS SPECIFIED OTHERWISE. -<�/ t \ \ \ \ \ / _ / 12>0 xti� F aqxLu / Q R�� PHASE III DRAINAGE v - / �' LJJ 7/ / AREA SEDIMENT v ' /'' in / 1 - / s TRAP B=o.8iACRES ((cam� C-6 PROPERTY LIMITS (TYP.) / '- �J ate- \ \ - - / / / / / ---- W S D' 'FIENCE ALL SIGNS "WARNIN PROPOSED LIMITS OF DISTURBANCE (TYP.) V (� �, / QUICK SAND, KEEP OUT _ U) / 'PROPOSED LIMITS OF CLEARIN ___ / �� 'f / / / / / / ul Z 0 PROP TREE G TYP. V / � Lu LU '�/ _ / EXISTING PRESERVED PROPOSED SAFETY FENCE, F ,-- __—' Z /-.. / STEEP SLOPES (TYP.) INSTALL SIGNS"WARNING SAF •../ / \ � \ \ ' :::�•,:�.:'.:. \' � \ _ I a-� \ \ '(`pI / j r � i--i / QUICK SAND, KEEP OUT" \S' X TING moo' WPO BUFFER (TYP.) s �\ _ \ \ J\/ �F61 P SED BAFFLES � \ � / � 7 s — / / \ \\ \ \\ _'�'' / � � � o� � � �/ !' \ I \ / W PROPOSED LIMITS OF DISTURBANCE (TYP.) PROPOSED ROCK WEIR OUTFALL \ I/ r<rn / ROPOSED LIMIT F TREE CLEARING (TYP.) O S O ' G , 0 O \ \\ \ / .� ' N PTSTDAXISTING moo -YEAR FLOODPLAIN (TYP.)` GRAPHIC SCALEEXISTING moo'WPO BUFFER (TYP. A OUTLETPROTEC ION WITH FABRIC ItV\ / pp UNDERLAYMENT(L=8'W2=3',W2 = D=28") 40 o zo ao eo +eo // / / / vTP v ---_ _—_ v _ —' v / /i �' // SEE SWM PLAN FOR LEVEL / /' EXISTING STREA ( _ / ' / / / o / SEE SWM PLAN FOR / SPREADER DETAILS / , / j 40 / / / w --- SF z --- ` — -- ` / / �' / OUTFACE DETAILS EXISTING moo-YEARFLOODPLAIN (TYP. v i ��r �� JOB NO. 182154 J LIMITS OF TREE CLEARING (TYP.) ---PROPOSED ROPOSED LIMITS OF DISTURBANCE (TYP.) / / / , _ �- SCALE ' / PROPOSED FLATVDOTCL.AIM-PRAPLINEDI RFABRI _ ' SHEET NO. OUTLET PROTECTION WITH FILTE/ / / /' _,' ' iUNDERLAYMENT(L=iT, Wi=y.S', W2=8.3' D=i8") V ----- '' ---------, �' i /71 / SEDIMENT BASIN'C' DETAIL SCALE: i"=2o' l / A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE RISER'S LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" / STANDPIPE WITH A RIM ELEVATION OF 725.50' SHALL COMPLETE THE STRUCTURE. RISER TO \ PROPOSED SAFETY FENCE, / INCLUDE A PERMANENT TRASHRACK & A TEMPORARY 06" DEWATERING ORIFICE (INVERT ELEVATION OF \ \ INSTALL SIGNS "WARNING / - 722'55')• ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF \ _ QUICK SAND, KEEP OUT" / THE TEMPORARY FACILITY TO A PERMANENT SWM FACILITY, THE CONTRACTOR SHALL PLUG THE / TEMPORARY DEWATERING ORIFICE WATERTIGHT. SEE SWM PLAN FOR ADDITIONAL PERMANENT SWM / FACILITY DETAILS. ALL CONNECTIONS SHALL BE WATERTIGHT, TYPICAL. �740 _ a (J / / \ \8 - �73 2 \ w - 7� N 4 '724 PROPOSED WOODEN F LE 72 �719 TOP ELEV.=726.00 /SB - - _N 14 C W AM / TOP OF DAM ELEVATION=728.0'. r- � TO PREVENT FLOTATION, THE RISER BASE SHALL BE FIRMLY 724, y EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. �o STR C-102 PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC \ X UNDERLAYMENT (L=8', W2=3', W2=9', D=3.8") _ PIPOPOSED 35' E VDOTCL. Al RIPRAP LINED EMERGENCY SPILLWAY / �c w/ 4:1 SIDE SLOPES & FILTER FABRIC / 12 / /72� /" > ?,\ \ 103r7� STR C-104 (j UNDERLAYMENT (STONE DEPTH=i8"). / SPILLWAY CREST ELEV.- 26. o'. / / a OOF -7 5 / i - PROPOSED 86' LONG FLAT LEVEL SPREAD 'Cl LS \ \ TO HAVE A 12" DEEP PLUNGE POOL & 6" WID �b� / RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP / LINING AND A SLOPED 3' (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM FROM THE \ py0 RIGID LIP EXTENDING TO THE EXISTING GRADE. �,Z \ WPO STREAM BUFFER, TYP. ALL RIPRAP TO INCLUDE FILTER FABRIC�`� RL MENTS & B� wIII F i8" DEEP. \ \ / Be x Q \ / X � 50' / � / NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES \ PROPOSED / VDOT STD. E 1 OF THE BASIN OUTFALL SYSTEM AND LEVEL SPREADER. EXISTING ioo-YR FLOODPLAIN PER - HEC-RAS ANALYSIS PERFORMED I ROPOSED FLAT VDOT EL. Al IRIPRAP BY COLLINS ENGINEERING IN / _ _ - J� _ INED OUTLET PROTECTION WITH APRIL 2019, SEE WPO 201900027. X / _ - - / -FILTER FABRIC UNDERLAYMENT (L=25', W2=4.5', W2=11.5', D=18") / - - PROPOSED So'x86' CONSERVATION EASEMENT. AREA WITHIN - J - EASEMENT TO REMAIN UNDISTURBED & TO BE LOCATED \ I / i OUTSIDE THE LIMITS OF DISTURBANCE. EASEMENT PREVENTS / -FUTURE DEVELOPMENT, DISTURBANCES & SITE CLEARING. \ Sediment Basin 'C' Design MN.1:0 SPILLWAY CREST OF EMERGENCY 3WITHOUT SPILLWAY drainage area (acres) 13.71 DESIGN HIGH WATER basin volumes: (using 2' contour Intervals) (25-YR. STORM 0".) elevation (ft) contour area (sf) volume (cy) o, 719.00 5625.0 0 MIR1.0' - --- _-- -- 720.00 6329.0 221.2 LASER CREST 722.00 7824.0 744.4 R soRAGE Ot Aa Nc 724.00 9452.0 1383.4 wEr s ORAGE 726.00 11212.0 2147.8 728.00 13078.0 3046.5 SLOIMF CLEANOUT POINT (•TO ' CSIORACERREDtIM wet storage: wet storage required (cy) (67*DA) 918.6 design high water (ft) dewatering orifice elevation (ft) 722.55 top of dam (ft) wet storage provided at this elevation (cy) 918.6 top width of dam (ft) available volume before cleanout (cy) (34*DA) 459.3 bottom of basin (ft) cleanout elevation (ft) 720.91 approx. bottom dimensions: distance from cleanout to orifice (ft) (> 1') 1.6 upstream face slope: downstream face slope: dry storage: dry storage required (cy) (67*DA) 918.6 baffles: principle spillway crest (ft) 725.50 length of flow, L (ft) dry storage provided at this elevation (cy) 1037.1 effective width, We (ft) diameter of dewatering orifice (in) 6.0 L / We (baffles not required if > 2) diameter of flexible tubing (in) (orifice+2") 8.0 collars: runoff: depth of water at spillway crest (ft) C (use 0.45 for bare earth) 0.45 slope of upstream face (Z1) tc (min) 17 slope of barrel (Sb) 12yr 3.20 Q 2yr 19.74 length of barrel in saturated zone (Ls) 125yr 4.80 Q 25yr 29.61 number collars required dimension of collars principle spillway: available head (ft) 1.00 emergency spillway: diameter riser (in) 48 required capacity (025-Qp) (cfs) spillway capacity, Qp (cfs) 29.61 bottom width (ft) diameter trash rack (in) 72 slope of exist channel (ft/ft) barrel length (ft) 45.50 minimun length of exit channel (ft) head on barrel through embankment (ft) 7.99 crest of spillway (fl) diameter of barrel (in) 18 726.50 728.00 10.0 719.00 47'x126' 2:1 3:1 YES 82 131 0.6 YES 6.50 2:1 0.53 % 39.84 2 4.0'x4.0' YES 9.87 35 33 % 40 726.50 SEDIMENT BASIN'D' DETAIL ) SCALE::C-2o' / \>o / >02 / � o or SCOTT R. LINS'Z VWV m r-) No. 35791 .� 11/6/20 �)02"S'IONAL V,��11�' T PROPOSED SAFE N \\ \ INSTALL SIGNS "WARNING \ \ QUICK SAND, KEEP OUT" j/x J \ o, A \ \ \ � O o � U o] � w � PROPOSED 20' WIDE VDOT CL AI R AP LINED ` \ \ \ o EMERGENCY SPILLWAY w/ 4:1 SIDE SLOPES & y \ \\ \ \ \ Ln Z FILTER FABRIC UNDERLAYMENT ( STONE 9 9 W w - \ \6 DEPTH=18").)SPILLWAY CREST ELEV.= 00.75'. �o � \ \ \ � \ \ e � y, P EXISTING ioo -YR FLOODPLAIN PER HEC-RAS ANALYSIS PERFORMED BY \ 7 COLLINS ENGINEERING IN APRIL 203.9, SEE WPO 201900027) WIP REAM \ BUFFER, TYP. e p \ PROPOSED 10' WIDE TOP OF D \ \ ELEVATION-702.0 / 8 TO PREVENT FLOTATION THE RISER BASE A BE FIRMLY \ \ �� 7,', 1 1 \ \ EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE 1 1 \ \ FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. 3.•y \ e , 1 1 l 1 , CD A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE ISER's LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" V A C)� STANDPIPE WITH A RIM ELEVATION OF 699.75' SHALL COMPLETE THE STRUCTURE. RISERTO A \ lP T1 INCLUDE A PERMANENT TRASHRACK & A TEMPORARY 05" DEWATERING ORIFICE (INVERT ELEVATION OF o" \ \ \ \ 'A/v 9 697.76'). ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF o~ / w \ \ 'O -/a I THE TEMPORARY FACILITY TO A PERMANENT SWM FACILITY, THE CONTRACTOR SHALL PLUG THE �e \ r (T, TEMPORARY DEWATERING ORIFICE WATERTIGHT. SEE SWM PLAN FOR ADDITIONAL PERMANENT SWM T�02 r \ ► IL9 FACILITY DETAILS. ALL CONNECTIONS SHALL BE WATERTIGHT, TYPICAL. PROPERTY LINE, TYP. PROPOSED FLAT VDOT CL. Al RIPRAP LINED 98� ' \ p POSED VDOT STD. CLA545'I IPRAP LillN OUTLET PROTECTION WITH FILTER FABRIC / ti UNDERLAYMENT (L=9', W2=6', W2=6', D=18") 9 OUTLET PROTECTION WITH FILTER FABRIC (7 \ - \ / \ \ \ \ (UNDERLAYMENT L 8, Wi=3', W2= ', D=18") ( ) o NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES Al PR PO�ED too-YR FLOO PLAIN PER HEC-I2 S N OF THE BASIN OUTFACE SYSTEM AND LEVEL SPREADER. ANALYSIS PERFORMED BY COLLINS ENGINEERING IN / U 'APRIL 2019, SEE WPO 201900027) M W N DEEP PLUNGE POOL& 6" WIDE Al RIPRAP LIMING AND SLOPED 3'I(M N. VDOT CL. Al RIPRAP V) PROPOSED 6 LONG F AT LEVEL SPREADER'D'. LS T AVE A 12" \ / Y / LINED EMBANKMENT DOWNSTREAM FROM THE RIGID LIP N Q J / EXTENDING TO THE EXISTING GRADE. ALL RIPRAP TO INCLUDE \ 1 FILTER F IC UNDERLAYMENTS & BE MIN. OF 18" DEEP. O O O /� 1 11 1 1 W ; 0. < O � 0 I �\ 1 0 0 W W 64 1\ I -- J J \ �� I 1 > O \ I \ W > SedimentBasin'D'Design \ \ \\ \ ~ MIN. 1' Wi SPILLWAY E' WITHOUT CREST OF EMERGENCY / v SPILLWAY \ \ drainage area (acres) 614 DESIGN HIGH WATER basin volumes: (using 2' contour intervals) (25-YR STORM ELEY.) / l i p POWELLS Arm W V CREEK elevation (ft) contour area (sf) volume icy) Ds. - - --- -- \ W W 695.00 2960.0 0 MIN1.0 696.00 3681.0 122.7 PoSER CREST \ PROPOSED 5ox64' CONSERVATION EA ENT. AREA ITHIN EASEMENTTO D (� r W DR STORAGE DIWATIE No \ REMAIN UNDISTURBED & TO BE LOCATED OUTSIDE THE LIMITS OF DISTURBANCE. 4 Y F__q 698.00 5217.0 450.6 DENCE EASEMENT PREVENTS FUTURE DEVELOPMENT, DISTURBANCES & SITE CLEARING - ! I'1 (D Q 700.00 6881.0 897.3 • WET • s,R E + ° W W 702.00 8672.0 1472.1 - I.- wet storage required (cy) (67*DA) dewatering orifice elevation ift) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> V) dry Storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) 12yr 3.80 Q 2yr 125yr 5.60 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Op (cis) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) SEOIMEM CPot"(• WET . LEANOUT STORAGE REINICED U) TO 31 C.Y./ ACRE)Ul z GRAPHIC SCALE w Q 2: 411.4 design high water (ft) 700.75 20 0 10 20 40 80 697.76 top of dam (ft) 702.00 411.4 top width of dam (ft) 10.0 205.7 bottom of basin (ft) 695.00 ( IN FEET ) 696.51 approx. bottom dimensions: 32'x160' 1 inch = 20 ft. 1.3 upstream face slope: 2:1 downstream face slope: 3:1 411.4 baffles: NO 699.75 length of flow, L (ft) 183 429.9 effective width, We (ft) 35 5.0 L / We (baffles not required if > 2) 5.2 7.0 collars: YES depth of water at spillway crest (ft) 4.75 0.45 slope of upstream face (Z1) 2:1 12 slope of barrel (Sb) 0.5 10.50 length of barrel in saturated zone (Ls) 29.07 15.47 number collars required 2 dimension of collars 3.5x3.5' 1.00 emergency spillway: YES 48 required capacity (Q25-Qp) (cfs) 4.97 15.47 bottom width (ft) 20 72 slope of exist channel (ft/1) 6 % 48.66 minimun length of exit channel (ft) 16 4.75 crest of spillway (ft) 700.75 24 SHEETS OF 4' X 8' X PLYWOOD OR EOUIVALEI II II I I 4' II 11 II s' ANTI -SEEP COLLAR %STALL COLLAR WITH CORRUGATIONS VFRIICIL COLLAR TO 9E OF SANE GAGE AS THE PIPE WITH WHICH R 15 USED CONTINUOUS WELD 11Z X r SLOTTED HOLES FOR 12' MIN. 3/e' DMEEIER DDLTS. BAND WIELD T10TN SIDES SLOTTED HOLES CDIRIUGATED METAL camHuouswEln AT Or C.C. SECTION B-B CCENTERWODSEAND e ELEVATION OF UNASSEMBLED COLLAR 3. UNASSEMBLED COLLARS SHALL BE MARKED BY PAINTING OR TAGGING TO IDENTIFY MATCHING NOTES FOR COLLARS: PAIRS. 1. ALL MATERIALS TO BE IN ACCORDANCE WITH 4. THE LAP BETWEEN THE TWO HALF SECTIONS CONSTRUCTION AND CONSTRUCTION MATERIAL AND BETWEEN THE PIPE AND CONNECTING BAND SPECIFICATIONS. SHALL BE CAULKED WITH ASPHALT MASTIC AT 2. WHEN SPECIFIED ON THE PLANS, COATING OF TIME OF INSTALLATION. COLLARS SHALL BE IN ACCORDANCE WITH 5. EACH COLLAR SHALL BE FURNISHED WITH TWO CONSTRUCTION AND CONSTRUCTION MATERIAL 1/2r DIAMETER RODS WITH STANDARD TANK SPECIFICATIONS. LUGS FOR CONNECTING COLLARS TO PIPE. Z W U) of U) W O J LU W L/'�U/ of �Q V ® C:) C:) N U Lu �0 w x a re JOB NO. 182154 SCALE 1"=20' SHEET NO. 21 Sediment Basin 'B' Design MIN. f' WISPILLWAY 2'WITHOUT CREST OF EMERGENCY SPILLWAY drainage area (acres) 5.25 basin volumes: (using 2' contour intervals) DESIGN HIGH WATER 125-YR STORY ELEV.) elevation (ft) contour area (sf) volume (cy) Ds• 740.00 320.0 0 M. TD -------- ------- 742.00 1188.0 52.5 asEa cREs 744.00 2573.0 188.5 ' DRY • STORAGE .: DEVICE...................... 746.00 4442.0 445.2 . wE S DRADE "?`:;:::' ..........:..:.: ...:.:.:. 748.00 6755.0 856.9 750.00 9513.0 1458.5 S(E• O T MINT WEE ' STCR REDUCED TO 34 C_Y./ ACRE) wet storage: wet storage required (cy) (67*DA) 351.8 design high water (ft) 748.33 dewatering orifice elevation (ft) 745.27 top of dam (ft) 450.00 wet storage provided at this elevation (cy) 351.8 top width of dam (ft) 10.0 available volume before cleanout (cy) (34*DA) 175.9 bottom of basin (ft) 470.00 cleanout elevation (ft) 743.81 approx. bottom dimensions: 13'x24' distance from cleanout to orifice (ft) (> 1') 1.5 upstream face slope: 4:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67*DA) 351.8 baffles: YES principle spillway crest (ft) 747.33 length of flow, L (ft) 90 dry storage provided at this elevation (cy) 366.6 effective width, We (ft) 66 diameter of dewatering orifice (in) 5.0 L / We (baffles not required if > 2) 1.4 diameter of flexible tubing (in) (orifice+2") 7.0 collars: YES runoff: depth of water at spillway crest (ft) 7.33 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z1) 4:1 tc (min) 12 slope of barrel (Sb) 0.5 % 1 2yr 3.80 Q 2yr 8.98 length of barrel in saturated zone (Ls) 59.83 1 25yr 5.60 Q 25yr 13.23 number collars required 2 dimension of collars 5.Ux5.0' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (in) 48 required capacity (Q25-Qp) (cis) 4.25 spillway capacity, Qp (cis) 13.23 bottom width (ft) 20 diameter trash rack (in) 72 slope of exist channel (ft/ft) 25 % barrel length (ft) 122.50 minimun length of exit channel (ft) 16 head on barrel through embankment (ft) 9.46 crest of spillway (ft) 748.33 diameter of barrel (in) 18 SEDIMENT BASIN'B' DETAIL \ / SCALE: 1"=20' \ / / I PROPERTY LINE, TYP. ro I / SEDIMENTTRAP'B' DETAIL SCALE: 1"=20' / --74+ -PROPOSED SAFETY FENCE, INSTALL SIGNS "WARNING / / QUICK SAND, KEEP OUT" �A B i 73 00 , ° p / PROPOSED 6' (Mll.) WI TOP OF DAM. _ TOP OF DAM ELEVATION=734.0'. \ oft Pb STREAM BUFFER, TYP. PROPOSED ROCK i / / / STING ioo-YR FLOODPLAIN PER HEC-RAS ANALYSIS PERFORMED WEIR OUTFALL (WIDTH = i7.6') \ \ / / BY COLLINS ENGINEERING IN / / - / APRIL 2029, SEE WPO 202900027. I Sediment Trap 'B' Design drainage area (acres) (<3) 2.93 ,• vARIAeIE trap volumes: elevation (ft) area (sf) wlume(cf) volume(cy) GROUND CREST OF STONE WEIR yylAg�• GROUND 728.00 1478.0 0 0.0 ELM 730.00 2317.0 3,764 139.4 732.00 3317.0 9,368 347.0 DRY STORAGE - R VMALE 734.00 4460.0 17,117 634.0 WET STORAGE (IXGVAIED) iLiER CLOTX ORIGN4 cNOIxD E �. wet storage: wet storage required (cy) (67*DA) 196.3 'SEE PLATE 3.13-' toATesE ACCRECAIE" CLASS I R~ bottom of stone weir (ft) 730.55 wet storage provided at this elevation (cy) 196.3 slope of wet storage sides 2:1 weir length (ft) (6xDA) 17.6 dry storage: bottom of trap elevation (ft) 728 dry storage required (cy) (67*DA) 196.3 bottom trap dimensions: 27k83' crest of stone weir 733.0 top of dam elevation (ft) 734 dry storage provided at this elevation (cy) 294.5 top width of dam (ft) 6 slope of dry storage sides 2:1 top trap dimensions 51'x130' SEDIMENTTRAP'A' DETAIL / >�pyTH SCALE: 1"=20' / (Z / / L PROPOSED R CO K� r WEIR OUTFALL EX. D)`TO =447. 3 SCOTT R. LINS'Z (WIDTH=13.2') /0 U No. 35791 112�- IP ��0� 11/6/20c� FIR X IONAL V, X J - SED SAFETY ENCE, i INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT"'7� ° 750• 75 74 / 1 74/ / N iP N - � k I i I O J 74 _ Z -I' 750 m I z X I X PROPOSED 6' WIDE TOP OF DAM. H o ~ in z TOP OF DAM ELEVATION=750.50'. 5: '-' -750 \ U j ce Sediment Trap 'A' Design drainage area (acres) (<3) 2.2 trap volumes: elevation (ft) area (so volume(cf) volume(cy) OR CfY1 CRESTOF STONE WEIR ,� �• GROUND 746.00 1800.0 0 0.0 748.00 2656.0 4,428 164.0 750.00 3640.0 10,699 396.2 DRY STORAGE - YARVHE 750.50 3906.0 12,585 466.1 WET STORAGE ♦• Mix (IXGMTED) iLTER CLOTH OMGWLL a Exn. ELIN. wet storage: wet storage required (cy) (67*DA) 147.4 'SEE PLATE''"-' COWY ACGAEGre" CLASS I R~ bottom of stone weir (ft) 748.00 wet storage provided at this elevation (cy) 164.1 slope of wet storage sides 2:1 weir length (ft) (6xDA) 13.2 dry storage: bottom of trap elevation (ft) 746 dry storage required (cy) (67*DA) 147.4 bottom trap dimensions: 24'x75' crest of stone weir 749.5 top of dam elevation (ft) 750.5 dry storage provided at this elevation (cy) 174.3 top width of dam (ft) 6 slope of dry storage sides 2:1 top trap dimensions 42'x93' - - - -- --- -- � / PROPOSED SAFETY FENCEGRAPHIC SCALE , /f / INSTALL SIGNS "WARNING / zo o o zo aU eo QUICKSAND, KEEP OUT" - / /� ( IN FEETr�� 1 inch 20 ft. I / PROPOSED WOODEN BAFFLES OP ELEV.=747.83 / / / A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE / ' RI Po OS N VDOT STD. CLASS Al RISER'S LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED / RIPRAP LINED OUTLET PROTECTION CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 747.33' / WITH FILTER FABRIC UNDERLAYMENT SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE A PERMANENTTRASHRACK & A PROPOSED / (L=8', Wi=3', Wz=g', D=i8") TEMPORARY 05" DEWATERING ORIFICE (INVERT ELEVATION OF 745.27'). ONCE THE SITE IS / VDOT STD. EW-1 / \ STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF THE / / / / f % \TEMPORARY FACILITY TO A PERMANENT SWM FACILITY, THE CONTRACTOR SHALL PLUG / STR B-110 THE TEMPORARY DEWATERING ORIFICE WATERTIGHT. SEE SWM PLAN FOR ADDITIONAL /S - VDOT MH-1 \ / / PERMANENT SWM FACILITY DETAILS. ALL CONNECTIONS SHALL BE WATERTIGHT, TYPICAL. / / STR B-104 VDOT MH-1 / / / / STR DOT MH81 STR B-102 v / VDOT MH-1 / ��c NDPEI 81 / � / /SCFtB 1p9 y0(A72F7„j TRB-103(18HDPE) STRg_107(12"HDpE) / \ �sTR /io1 (16" HOPE) T�e1 / PROPOSED5 VDOT STD. EW-i WPO STREAM BUFFER, TYP. P / / / / PROPOSE6 FLAT VDOT CL. AlRIPRAP LINED OUTLET �o PROTECTION WITH FILTER FABRIC UNDERLAYMENT SO" (L=i7', Wi=4.5', W2=8.3', D=i8") :' o TO PREVENT FLOTATION THE RISER / PROPOSED 72' LONG FLAT LEVEL SPREADER'B'. LS TO HAVE A 12" DEEP PLUNGE BASE SHALL BE FIRMLY EMBEDDED 6". ! / / / / POOL & 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP LINING AND A INTO AN 3.8" THICK REINFORCED 1o' WIDE TOP OF DAM / SLOPED 3' (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM CONCRETE 73 ELEV.=75o.00' / FOUNDATION THAT IS / FROM THE RIGID LIP EXTENDING TO THE EXISTING GRADE. ALL RIPRAP TO � / / / - \ _ - 8'x8', AND BURIED BELOW GROUND. - - - / / i INCLUDE FILTER FABRIC UNDER YMENTS & BE A MIN. OF i8" EP. / \ / o // / AKIO NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES / 1 J OF THE BASIN OUTFALL SYSTEM AND LEVEL SPREADER. EXISTING i/oo-YR FLOODPLAIN PER HEC-RAS ANALYSIS PERFORMED PROPOSED 20' WIDE VDOT CL. Al RIPRAP LINE / BY COLLINS ENGINEERING IN EMERGENCY SPILLWAY w/ 4:1 SIDE SLOPES & - / I ; / APRIL zoig, SEE WPO zoig000z7. _ FILTER FABRIC UNDERLAYMENT (STONE / - / / I % PROPOSED SCONSERVATION EASEMENT. _ / AREA WITHIN EASEMENT TO REMAIN UNDISTURBED DEPTH=i8"). SPILLWAY CREST ELEV.=748.3�� _ / / / / �j� _ / DISTOUBE RBANCE EASEMENT LOCATED OUTSIDE PREVENTS FUTURE i� / / / / - / DEVELOPMENT, DISTURBANCES &SITE CLEARING. OWELLS CREEK w N L9 ti M M N M N W o z N N V) Q J W N J LLI W J G V 1 W > � 0 L z z U Z = W Z W U oC 2: Y rr In''� q W V W Ln Ul U z °6 Q z LU Zw O IY Q � () w O J LU J � W LU J Q C:) O O N Lu 0 w JOB NO. 182154 SCALE 1"=20' SHEET NO. 22 I / / � / \ i // I / ❑ 1 / / // Q \V L— — — ❑ - - - - - - v / /V �/ ,400 100/ 100 <` two/100 � V I 00 / ° ,�' ♦ �/ / / / 5/ 100 Z_ / \v� / °ram❑ / // ❑ I , A i 100' of OMw/ o ELEV-S) / /\/ / -� x / '/ / / �y� :•�' --- — I ❑ /\/ A V c=0.1 / O/OTFA(;TLc =c0l 0.h2r7s% hrs. VLEVacAL �- 1,025 OF CHNL. kLOW T 0.6 400, of coNt. V/ FLOW w/ n / / / /-,.'�/ ,-� �/TOTAL Tc= 0.1O❑/ \/ V \ �/ /,� // / —r1 am—/�//// // / ❑ � // / V \ SU@A READ: \ O /-!` 8 h. THIS - 474a A \ i -- N TT/R. CI INSZ No. 35791 11/6/20�1 o�� Z\ z O \ \\ \ Oa ~ U w m 1 1 c=n O I- cn z LU Ce w/ ELEV=6' Tc=0.14 rs� _ i i ` / / \ // / / — — / / / / / / \ F 535' QF FLOW w/ 0 EL V=40' CN=61SUBA / / / / � Tc= 0. h / � �❑ �T i'ISPL/AN� _ / � / \ — — / lLu �// \ — / Y / / r\ I\ \ — — O ^ v / / // / // PHASE I SUBAREAS A & B i 1\ / / . FO i / 12.68ac. I ti- / —/— / / / / / i — / _ / _ / v v // / / �OF CONC. F OW w /A / /`- / ` — / ❑ � � �/ � — / f /_ / / / / ❑� L9 / / / ❑// — / / 7/ / ti Z) �TH+S-PLAN / / / / / \\ -�-� j< �_�� / — / 11 i l 839-ac. / / /� / /� fee— -7�i /_ � / —' v V / / ❑ �� / �N_AM / / C`') _ CN- 5 / / / �/ / \ \ �i — �/ / v — Cy G) LU / b _ a) ` Q — — — — = —-— LOCATION OF APPROVED PHASE I CV \ � LEVEL II BIORETENTION BASIN // 1 — `' / / / / / /� �/� / \ v �% / Vv /i- _ _ / — —vv v v — v A \ V ❑ \ V — / �/C�� V I IIII v> LU 1 1 1 LU LU // {/ 4 = A \ / '—' / / / / / / / / / ' / / / — A \ V❑� ❑ / / //� V °C a O0p0�80P 1 1 1 e . I 1 P / 1J � Q (/i / P��� �� —�V._ 1// // t✓ '(_/� i -� // i _/ice/ ire \A VAA❑V\VA\VA I A �e� --/ L Z \\- / t \ \ °oos00000 i > �/ \ \ VAA \\ \ \V I I A V r /- / ° °o co ° i — CIO / / -— -� / / i — i // A\A V ❑ \ I _ i — W / �/ �❑ � \ \ V_"'//// —� v — -- �— _ `_—v_--.—� �//// � // VA v V AAA\�\\\\VA V � /� A� `°° — � � � L9 Vv\OA� / / �III� \ �— / Q LU \\ ,I ❑ \ — _ V v — �� / v w \\ �VA\ VVw�� _ �� �I I I I CO SUBAREA AOAD \ Q °— A\❑❑\AAA\ \❑ A A e I C> / ❑V❑A V l ��- IIII IIII 1.10ac. t V / // Q W - - W oC — S I � ❑ ❑ vV�v v\��\�\VAAA\�A \ may ��yy I �, ���I� oo°0 0�•0�v \ �\ �\/\\ I _� v vv � �0/� \ / VAA V AA�V A sOoeee0000y9� �� I �� v — / %, \❑ � �� 1 � 1 ( / A\vvvv ❑v�� /j/�� v V L noNrRo� I I /� LLHI I (ED I \ VA❑VA \�AV —°• COBIORE JI NTION BASIN, AD -LEVEL) I — r-Ti \V Ul V A LU LU L0 LU 1—D 1 ❑ WATERSHED SUMMARY FOR SUBAREA B Area, 1-year Flow, 2-year Flow, 10-year Flow, _ — ❑ — — — - CN ac. cfs cfs cfs DA B (Pre-Dev.) 65 8.39 4.74 8.46 21.48 WATERSHED SUMMARY FOR SUBAREA C n r-� CN Area, 1-year Flow, 2-year Flow, 10-year Flow, General Construction notes for Stormwater Management Plans ac. cfs cfs cfs 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to DA C (Pre- Dev.) 63 8.87 3.79 7.30 19.26 be approved by a geotechnical engineer. A geotechnical engineer is 1 to be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater WATERSHED SUMMARY FOR SUBAREA D management facilities. 3. For temporary sediment traps or basins which are to be converted l CN Area, 1-year Flow, 2-year Flow, 10-year Flow, to permanent stormwater management facilities; conversion is not - ac. cfs cfs cfs to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. FDA (Pre-Dev.) 61 4.79 1.29 2.58 8.32 LU Q 0- 0 C) LU LU \ \ \ Impervious Area Summary Pre -Development Subarea L11 ❑ O \ /// Existing Residences 43,350 sf 13,750 sf IL_�I a \ \ / '' Existing Roads w F \ / 57,100 sf 0 w \ \ \ /Impervious Area Summary a v=i \ / Pre-Developmentr Suba ea C roe No Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Existing Residences 24,975 sf 182154 Pre-Dev. Subarea Post-Dev. Subarea Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection Existing Roads 19,425 sf SCALE 44,400 sf 1"=100' 1 1 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.b (10-yr Post-Dev. Flow < 10-yr Pre-Dev. Flow) N/A since Section C.2.b is met Impervious Area Summary 2 2 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined within BMP & pipes) Section C.3.c (Outfalls to mapped Floodplain) Pre -Development Subarea C SHEET NO. 3 3 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined within BMP & pipes) Section C.3.c (Outfalls to mapped Floodplain) Existing Residences 12,125 sf 23 Li IE - \ I I N / , ' < / T ❑ I 1 LX _ ---- - 4-9-OL- ' mom 40 I G SOO — m / l A VI T TAL Tc= 0.19 hrs. \ - •� _ — / /`ice ��; .A ( / V 100' OF OCP w A ELEV-5' Tc=0.1 / 1 OF CONC. FL W w LEV�6' c=0 / / i — \ 25' OF CHNL. SOW 8 s'Tc / ���" �' y� l ------ A _sr' r . V l \-TOT f � 3 100' OF OLFJw'/1 A N I� U v 225' OF (7 TT/R. CZ•LLINSZ No. 35791 11/6/20�1 Zz O \ a \ �\ 0 U w m L \ � J z in z LU Ce /TOw/ T ELEV=� 6' h Tc=0.1 �rs� / ' ` \ i 300' QF FLOW w Ill ELf V=2 ' Tc O 0P hrs / / CN 7y/ / / \ CHNL FLOW/ 0 ft/ (0.0 hr / / / / i� `.' J / —TC 0-23 /\ - _ % '' /. I �\_ _ -: \\I\ \\\ Q / f/ Tc- brs. e - - / p SUBARE �_ - ��_ PHASE I SUBAREAS A & B 11 r T$IS PL N \ _ � f L 12.68ac. � —�9 III i -� /�� r J / / \ Tc�O. rL9 � / — — �\ �u >. Q Cy s I1I co Q CN / _ /— _ — — — .i LOCATION OF APPROVED PHASE I CV — _— _ — — — ?� _ \ \ 1 /— LEVEL II BIORETENTION BASIN J _ < LU Vl —�� A\_ \\_ .: / occoo LU LU L9 � oC CONNECTOR ROAD � VAVA\� SUBAREA J— Q °° ,� - _- 2 � °\ ryi I I / - - - _ U LU DC 0 — _ o ° °OdOo 00000o ems° -, � /� \ / VA AA\ VA�V A °°om00000y9� \ —i A V / I TIONPR� '� ' I /� f LUa \wvvv\vww� �ROAD-LEVEL MORE N ioBsslev 0-6 J U U) LU (n LU LU (n 0 Q (n w 2 ED f LU LU _// I ��'�� Q 0 — STORMWATER MANAGEMENT (WATER QUANTITY) NARRATIVE: 1 v / / S y�� /ii• OVERVIEW:.' Q LLI — -THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM REQUIREMENTS. CHANNEL .. & FLOOD PROTECTION COMPLIANCE ARE MET IN ACCORDANCE WITH MINIMUM 9 VAC 25-870-66 WATERSHED SUMMARY FOR SUBAREA B / /�! O > REQUIREMENTS. PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR ' / - 0 CV LU _ _ — ❑ — _ ADDITIONAL DETAILS PERTAINING TO THIS PLAN's STORMWATER QUANTITY COMPLIANCE. Area, 1-year Flow, 2-year Flow, 10-year Flow, CN \ / ' ❑ ❑ ac. cfs cfs cfs WATER QUANTITY SUMMARY \ THE VAST MAJORITY OF THIS PLAN's PROPOSED DEVELOPMENT IS CAPTURED VIA STORMWATER CONVEYANCE DA B (Post-Dev.) 73 8.39 1.78 6.56 17.33 u (n ❑ SYSTEMS. THE PROPOSED STORM SEWER SYSTEMS DISCHARGE INTO THREE PROPOSED STORMWATER C)d MANAGEMENT FACILITIES, EACH OF WHICH HAS A CONCENTRATED OUTFALL. SWM FACILITY 'B' ATTENUATES f RUNOFF FROM SUBAREA 'B', SWM FACILITY 'C' ATTENUATES RUNOFF FROM SUBAREA'C' AND SWM FACILITY L WATERSHED SUMMARY FOR SUBAREA C `� w -'D' ATTENUATES RUNOFF FROM SUBAREA 'D'. CHANNEL AND FLOOD PROTECTION ANALYSES WERE Impervious Area Summary Impervious Area Summary Impervious Area Summary L ❑ 0 PERFORMED AT ALL THREE OF THESE FACILITIES' CONCENTRATED OUTFALLS. CN ac. cfs cfs cfs Area, 1-year Flow, 2-year Flow, 10-year Flow, Post -Development Subarea B Post -Development Subarea C Post -Development Subarea D U)FROM A CHANNEL PROTECTION STANDPOINT, ALL THREE STORMWATER MANAGEMENT FACILITIES ARE Proposed Roads 15,075 sf Proposed Roads 31,750 sf Proposed Roads 18850 sf JOB No. COMPLIANT WITH 9 VAC 25-870-66 SUBSECTION B.3.a (ENERGY BALANCE) AND THE LIMITS OF ANALYSES DA C (Post-Dev.) 74 8.87 1.29 3.99 20.44 Proposed Sidewalk 5,050 sf Proposed Sidewalk 12,825 sf Proposed Sidewalk 7275 sf I n STOP AT THE SWM FACILITIES SINCE SUBSECTION B.3.a IS MET. FROM A FLOOD PROTECTION STANDPOINT, Proposed Driveways 12,915 sf Proposed 182154 Pro YARD DRAIN NOTES: SUBAREA'B' IS COMPLIANT WITH 9 VAC 25-870-66 SUBSECTION C.2.b (10-yr PEAK POST-DEV. FLOW < 10-yr Proposed Driveways 7,920 sf P Y posed Driveways 11,475 sf 1 1. FINAL DESIGN (ELEVATIONS, DIAMETERS, SLOPES, etc.) OF YARD PEAK PRE-DEV. FLOW). AND BECAUSE SUBSECTION C.2.b IS MET, THE LIMITS OF FLOOD PROTECTION WATERSHED SUMMARY FOR SUBAREA D Proposed Residences 34,505 sf Proposed Residences 46,150 sf Proposed Residences 9675 sf SCALE DRAINS WILL BE PROVIDED WITH THE FINAL SITE PLAN. _ ANALYSIS ENDS AT SWM FACILITY'B'. FOR SUBAREAS 'C' AND'D', FLOOD PROTECTION COMPLIANCE WITH 9 n i 2. ALL ROOF DRAINAGE SCHEMATICALLY SHOWN WITHIN VAC 25-870-66 IS MET VIA SUBSECTION C.2.a (CONFINES THE 10-yr POST-DEV. STORM EVENT WITHIN SWM Area, 1-year Flow, 2-year Flow, 10-year Flow, Existing Residences 43,350 sf Existing Residences 24,975 sf Future Roads 14650 sf 1 = 100 POST_ DEVELOPMENT SUBAREAS B, C & D DRAINING TO SWM FACILITIES FACILITIES 'C' AND 'D' AND THEIR OUTFALL PIPES). THE FLOOD PROTECTION LIMITS OF ANALYSES FOR SWM — CN ac. cfs cfs cfs Existing Roads 13,750 sf Existing Roads 8,725 sf Future Residences 38825 sf SHEET NO. SHALL BE PIPED DIRECTLY TO YARD DRAINS, OR SHEET FLOW TO FACILITIES 'C' AND 'D' IS SET BY SUBSECTION C.3.c (THE SWM FACILITIES 'C' AND 'D' OUTFALL TO A MAPPED 119 650 sf 137,340 sf ' 100,750 sf 24 INLETS, AND SHALL BE DETAINED VIA THE PROPOSED SWM FACILITIES. FLOODPLAIN OR OTHER FLOOD -PRONE AREA). DA D (Post-Dev.) 79 4.79 0.30 5.23 16.35 j \ STORMWATER MASTONAGEMENT WATER QUALITY NARRATIVE: POST DEVELOPMEN SCSWM WATER QUALITY PLAN; W. OVERVIE RT IIB SWIM REQUIREMENTS. AN OVERALL ANALYSIS OF PLEASANT GREEN'S PHASE I, PHASE II, PHASE III AND ITS CONNECTOR ROAD WAS I I \ - - - - - - / ° W- - -) -� W� -J A� - ' •�'�''r� ��� \ \ PERFORMED HE ROHE STO ENSURE COMPLED STORMWATER IANCE AS A WHOLE WAS MET. PLEASE ANAGEMENT PLAN COMPLIES WITH ASEE THE ATTACHED STORMWATER / - - - - - - - i ,/ __---- / _ _., \ THE TOTAL ESC LIMITS OF DISTURBANCE / - � \ MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS PERTAINING TO THIS PLAN's WATER \ / / `^! - QUALITY COMPLIANCE. BOUNDARY, AREA=32.04 acres, IS USED FOR THE \ � WATER QUALITY SUMMARY TOTAL VRRM BOUNDARY FOR WATER Q UALITY \ / - _ THE BOUNDARY FOR THE TOTAL LIMITS OF DISTURBANCE ASSOCIATED WITH THE CONSTRUCTION OF PLEASANT GREEN (i.e. PHASES 1-3 & THE CONNECTOR ROAD) WAS USED FOR THE BOUNDARY FOR THE \ - ' �000 VIRGINIA RUNOFF REDUCTION METHOD'S WATER QUALITY CALCULATIONS. THIS BOUNDARY AND ITS ' � DISTURBANCES TO AN EXISTING SWM FOREST & OPEN SPACE EASEMENT YIELDED AN OVERALL REQUIRED PHOSPHOROUS REMOVAL RATE (25.72 Ibs/yr). THIS PHOSPHOROUS LOADING WAS MITIGATED THROUGH THE IMPLEMENTATION OF MULTIPLE BEST MANAGEMENT PRACTICES. p � � '_ i ' � 000 PHASE I (WPO 201900003) HAS BEEN APPROVED WITH A PROPOSED LEVEL II BIORETENTION BASIN TREATING SUBAREA E. PHASE I ALSO UTILIZED THE BEST MANAGEMENT PRACTICE OF PURCHASING SOP NUTRIENT CREDITS. THE CONNECTOR ROAD (WPO 201900027) ALSO PROPOSES A LEVEL II BIORETENTION BASIN TREATING SUBAREA A. THIS PLAN, WHICH ENCOMPASSES PHASES II AND III, TREATS SUBAREAS B, C & D THROUGH THE BEST MANAGEMENT PRACTICE OF RELEASING SHEET FLOW RUNOFF TO A CONSERVED OPEN SPACE (VA DEQ SPECIFICATION #2). A BREAKDOWN OF EACH BMP AND ITS REMOVAL RATE PROVIDED CIS SHOWN ON THIS SHEET. vvI - \ \ \ \ A \ AFTER THE IMPLEMENTATION OF THE ABOVE BMPs, A TOTAL PHOSPHOROUS REMOVAL RATE OF 27.62 Ibs/yr IS PROVIDED (20.65 Ibs/y REMOVED + 6.97 Ibs/yr NUTRIENT CREDIT PURCHASE). THIS IS A SURPLUS OF 1.90 Ibs/yr (27.62-25.72). ALSO, 80% OF THE REQUIRED PHOSPHOROUS REMOVAL RATE IS TREATED V / \ �' ONSITE AND EXCEEDS THE MINIMUM 7THRESHOLD. 1 i ' �i / SUBAREA C / � ' WATER QUALITY GROUND COVER SUMMARIES \ / / V / �� / �� / j1 j} Phase I Limits of Disturbance 13.15 ac. / \ - - / F ------ - ' �I SUBAREA D Connector Road Limits of Disturbance 1.90 ac. Phases II &III Limits of Disturbance not 16.99 ac. Previously Covered under Separate Permit � \ / / ' // / / / Total Limits of Disturbance = 32.04 ac. ri Cs9 / A �.. Ll1_I C' 9 �' (Used for VRRM Water Quality Boundary) \J / / / -- � s Approved Phase I Impervious Areas- Soil Type B Connector Road Impreious Areas- Soil Type A 0.51 ac. / \ ' 1 `� � ' � "n-/ `" � / j � \ Nil Phase II Impervious Areas- Soil Type B 6.72 ac. ' M 0� A Phase III Impervious Areas- Soil Type B 2.26 ac. / Total lmpervousAreas= 14.05ac. - Y O Managed Turf Areas Within LOD- Soil Type B 16.60 ac. / Managed Turf Areas Within LOD- Soil Type A 1.39 ac. Total Managed Turf Areas = 17.99 ac. SUBAREA B I � i %�/eo/%/gym - - �L � /� J �' �� � � • � � � ��� "� �� A 0 // / � � �- � � � VA - � 1 � � SUBAREA APPROVED LEVEL II BIORETENTION BASIN / %/ .q n .- s' - / / / / / _ _ - ` _j / ', / ASSOCIATED WITH PHASE I, WPO 201900003 / ``� .-"� / / / // / j/ j ��� -) / % COVERED UNDER SEPARATE PLANIlk TT/R. CZ�LLINSZ No. 35791 11/6/20 �1 / z z o k Oa U f W m 'n o � / V / z o H- W ~ cc -, 'APPROVED LIMITS OF DISTURBANC o Phase 11 Proposed Impervious Area Breakdown w IN (ASSOCIATED �� - / - J r S �� �/_ _ (ASSOCIATED PHASE I, WPO 201900003) & / j Roads 85,500 sf -PROPOSED LIMITS OF DISTURBANCE J PROPOSED LIMITS OF\pISTURBANCE \ // / Sidewalks 30,800 sf �� \\ \ \ \ \ 1 ( SSOCIATED WITH THE CONNECTOR ROAD, WPO l / //� - - - _ ��` i - 01900 7) COVERED -UDDER SEPARATE PLANS ASSOCIATED WITH T0![S PLAN NOT / / /� i 1 \ \\ \ \ \ ) // /_ Detached Residences 62,640 sf � PREVIOUSLY COVERED�UNDERA -- / SEPARATE PLAN i /( / Attached Residences 79,800 sfe8, 1 1. - / / / 1 r ��_ - / t / G i/� J Driveways 34,110 sf \\\ \\\\\\\ J ( \ \ - 1, °° ° °o° SUBAREA A \ _ / V Phase III Future Impervious Area Breakdown 292,850 sf \ L9 / Roads 14,650 sf Attached Residences 62,250 sf \ \ \ `\\\ \\\ l \ Drivewa s 21,420 sf \ ` \ / \ // MATCHLINE SEE / vvvv0 v / vv Vvv VAAv�\vi o THIS SHEET �- /� c� 98,320 sf \ \ - - N Q PRE -DEVELOPMENT SWM WATER QUALITY PLAN: MATCHLINE SEE CY ° II THIS SHEET THE TOTAL ESC LIMITS OF DISTURBANCE / / v N W \ \ BOUNDARY, AREA=32.04 acres, IS USED FOR THE / / - j' / w /� " \\\ \��°-°�°°°°�°� J ?. I II - \ \ v \ \ TOTAL VRRM BOUNDARY FOR WATER QUALITY / - - _ % An / f / ' \ N Q - - \ / SUBAREA° z X LU /// / / / / / ❑ / // // / / // J / -- '� - / / _ a _ CO Z L CA ION OF P OPO ED L EL / ��. %/ r _ �/ \ / / / / _ _ - /I V� V - \�\V / / W LU BIORE EN ION BA N (A SOCI \ �� V V( THE C NN R OAD/ WPO 201 02 - 1 /VA „� /. i VAV AL9 0 RE E ED UNDER SEPARATE PLA ����LU I APPRO�ED LIMITS OF DISTU AIyC� \ i / �j/// // A \ .y / - / i / /l /// --- / /l // �AAI -�� \-y\ \�\� (ASSOCI ED PHASE I, WSF�Q�.9b900T) & �/ / / A PROP SED LIMITS OF BANCE I % -- `V L .�\� (A OCIAT D WITH THE C NECTOR ROAD, WPO _ LU 201 00 ) COVERED DER SEPARATE PLANS / / ( \ / V - / / - -� / / / / - / / / I / i ��� , ` \� I LU 1 LU LU 4 _/ l / )l/i T Ul LU LU 0 (� LU zz LU 00, 016 A / / / / �, -- � i -� �_ - / - _ _ / / // / i i � � � � / \ � / � _ . r / APPROVED LEVEL BIORETENTION BASIN / / / _ - - i� - / / / /�/ / / - SUMMARY OF PHOSPHOROUS REMOVAL RATE REQUIRED / %�/ (ASSOCIATED WITH PHASE I, WPO 201900003) O LU / 1 V�V �i �� / COVERED UNDER SEPARATE PLAN Q / \ / / / / / / � ,,,, �, � �- -.� � _ _ - � •«- / % / // // Total Phosphorous Removal Rate Required for Proposed Pleasant Green Phases I, II, III and the Connector Road 25.35 Ibs/yr , � / / '�' N / / i / � ,,••� � v,» � / / / / �, r Additional Phosphorous Removal Rate Required for Connector Road's Impacts to SWM Forest &Open Space Esmt. 0.37 Ibs/yr � 0 Q Total Phosphorous Removal Rate Required 25.72 Ibs/yr / ® / 'Wo / APPROVED LIMITS OF DISTURBANC a (ASSOCIATED PHASE I, WPO 201900003) & \ SUMMARY OF PHOSPHOROUS REMOVAL RATE PROVIDED / -PROPOSED LIMITS OF DISTURBANCE \ ' ( SSOCIATED WITH THE CONNECTOR ROAD, WPO PROPOSED LIMITS OF pISTURBANCE Approved Phase I (WPO 201900003) Phosphorous Removal Rate Achieved from Nutrient Credits 6.97 Ibs/yr \ u ASSOCIATED WITH TFhS PLAN) NOT - ° I /a \ ` Z01900A2-7}LOVERED-UWDER SEPARATE PLANS w iF / / / PREVIOUSLY COVERED UNDER A Connector Road (WPO 201900027) Phosphorous Removal Rate Achieved from Level II Bioretention Basin (Subarea A) 1.17 Ibs/yr o w 5€PARATE PLAN Proposed Phosphorous Removal Rate Achieved from Phase 11's Outfall to Conserved Open Spaces (Subarea B) 6.39 Ibs/yr - J a -SUBAREA A Proposed Phosphorous Removal Rate Achieved from Phase II's Outfall to Conserved Open Spaces (Subarea C) 7.07 Ibs/yr \ °°° �, ' - - JOB NO. A A ---- / Proposed Phosphorous Removal Rate Achieved from Phase 11 & III's Outfall to Conserved Open Spaces (Subarea D) 4.60 Ibs/yr °'°° 182154 -Approved Phase 1 (WP0 201900003) Phosphorous Removal Rate Achieved from the Level 11 Bioretention Basin (Subarea E) 1.42 Ibs/yr \) / °°°° - SCALE / -- /Total Phosphorous Removal Rate Provided 27.62 Ibs/yr > > / �j MATCHLINE, SEE _ 1"=100' / SHEET NO. Total Phosphorous Removal Rate Provided Onsite 20.65 Ibs/yr THIS SHEET /r / ° °1 1�11I=I �11� � � - 1 1 25 \ - - - Percentage of the Required Phosphorous Removal Rate Treated Onsite (20.65 / 25.72 x 100) 80 /°.__ STORMWATER MANAGEMENT FACILITY 'B' DETAIL, SCALE I"=30' S69 - - \ - i \SEE THIS SHEET\FOR g. / S ED PROFILES OF. / � PROPOSED BASIN'S FLOOR SHALL BE THE SWIMFACILITY, TYP,�I J/ _ SLOPED TO DRAIN TO THE RISER (o.5°rfi MIN.) WITH POSITIVE SLOPES THROUGHOUT. TO PREVENT FLOTATI N THE - 7 ' W � \ \ ISER BASE SHALL BE FIRMLY I / A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL \ � EMBEDDED 6" INTO A il�' I SERVE AS THE RISER's LOWER SECTION, IN CONJUNCTION WITH THICK REINFORCED CONCRETEI THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" \ S - FOUNDATION THAT IS 8'x8', _ - STANDPIPE WITH A RIM ELEVATION OF 747.33' SHALL COMPLETE \ AND BURIED BELOV\GROUND.I \ - -1 +_0O \ THE STRUCTURE. RISER TO INCLUDE (1) ONE PERMANENT 06" \ \ \ \ / - - I LOW FLOW ORIFICE WITH AN INVERT ELEV.-739.75, AND (4) FOUR PROPOSED VARIABLE WID H S PERMANENT 12" MID -FLOW ORIFICES WITH INVERT ELEVATIONS OF SWM & ACCESS 745.33'. CONTRACTOR SHALL PERMANENTLY PLUG ANY EXISTING �• \ \ - 01' O �-TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME S S\ �\j- •_\ �* d - OF THE FACILITY'S CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE STATE APPROVED TRASHRACKS, TYPICAL. SEE THE DETAILS \ \ \ ON SHEET 27, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. \ L� V �` "•'•-• � ••-----� ---�PROPOSED zo'WIDEGRASS LINED, GRADED �� \ ACCESS (z%MAX. CROSS SLOPE) \>> PROPOSED za WIDE VDOT RIPRAP LINED EMERGENCY SIDE SLOPES & FILTER FABRIC�- UNDERtAYMENT (STONE DEPTH=18"). 1o'W4eETOPOF?D,�AM 74 33'. ELEV.= o.6-6 1`TP- SPILLWAY CR€ST€LEV.= 8. 75 , STR B-102 - _ - EXISTING 100-YR FLOODPLAIN PER\ - - - _ _ \ \ \ S --HE6--RAS ANALYSIS PERFORMED \ BY COLLINSTNG4N._ERING IN APRIL \ - \ S \ \ \ 2019, SEE WPO 027. \ \ ♦ T \- - / f\ 4 • \ - - - - WPO STREAM\ 'P \ \ J BUFFER; \ \ - - - \ STR 13-104 \ \ PROPOSED STR B-107, A 012" LOW -FLOW OUTFALL CARRYING THE TREATMENT VOLUME \ 38 - I FLOW TO LEVEL SPREADER 'B' (75.5LF OF 012" HDPE @ 1.00% (II=736.37, I0=735.61) PROPERTY LINES \ I \\ \ \ M \ - A TYP. -7 4� / v \ '• , A v STR B-108 \\ \ \ VDOT MH-1 STR B-109 \ A v \ \ \ V A I RIM=738.75 0 A A\ 59.1 LF OF 012" HDPE @ 1.00% V A ..- \ \ \ PROPOSED FLATVDOT CL. Al RIPRAP - \ (II=735.51, IO=734.92) \ \ LINED OUTLET PROTECTION WITH \ FILTER FABRIC UNDERLAYMENT _ STR B-110 (L=17', W1=4.5, Wz=8.3', D=iB") / 3+75 --- \ \ VDOT MH-1 \ \ \ \ \ RIM=738.66 v v\ A STR B-111 \\ \ \ \ \ \ \ / - ♦ - / 6.67 LF OF 012" HDPE @ 1.00% \ (\(II-734.82, IO=734.75) A v A PROPOSED 72'LONG FLAT LEVEL SPREADER'B'. LS TO \\ \\\ PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION \ \ WITH FILTER FABRIC UNDERLAYMENT (L=8', W1=3', W2=9', D=iB") HAVE A 1i' DEEP PLUNGE POOL & 6" WIDE RIGID LIP. LS _ \ TO INCLUDE A VDOT CL. Al RIPRAP LINING AND A SLOPED v � - \ 734.75- BEGINNING OF LEVEL SPREADER \ 3' (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM FROM THE RIGID LIP EXTENDING TO THE 733.5- BOTTOM OF LEVEL SPREADER \ \� \ EXISTING GRADE. ALL RIPRAPTO INCLUDE FILTER FABRIC - \ \ \ / \ 734.5\ TOP OF LEVEL SPREADER \ UNDERLAYMENTS & BE A MIN. OF 18" DEEP. v � \ \ \ v v A v \ \ \ V PROPOSED 50'x72' CONSERVATI�� 734.0 \ \ \ \ \ EASEMENT. AREA WITHIN EASEME \ TO REMAIN UNDISTURBED & TO BE 733.8 \� W 3 LOCATED OQTSlDE OF THE LIMITS OF \ \ \ \ \ ISTURBANCE. EASEMENT PREVENTS v v \ \ \ \ \ \ \ n FUTURE DEVEOL�MENT, \ \ \ \ \ \ \ \ \ D TURBANCES & SITE CLEARING. \ 733.0 51 \ \\ \\ \ \\ \\ \\ \ \ 732.4� // \ ♦ \ STORMWATER MANAGEMENT FACILITY 'C' DETAIL, SCALE 1"=30' \ 0+00 ` - PROPOSED BASIN'S FLOOR SHALL BE SLOPED TO DRAIN TO SEE THIS SHEET FOR - THE RISER (o.5%MIN.) WITH POSITIVE SLOPES THROUGHOUT. SCALED PROFILES OF t' • - A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE \ \ THE SWM FACILITY, TYP. RISER's LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED \ \ \ \ ♦� - _ \ \ CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 725.50, \ \ TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY - r SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE (1) ONE PERMANENT 05" \ EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE - _ - 2 LOW -FLOW ORIFICE WITH AN INVERT ELEV.=718.75, AND (4) FOUR PERMANENT \ \ \ \ FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. �, & Gp 6" MID -FLOW ORIFICES WITH INVERT ELEVATIONS OF 724.5'. CONTRACTOR SHALL PERMANENTLY PLUG ANY EXISTING TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME OF THE FACILITY's CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE STATE APPROVED TRASHRACKS, TYPICAL. SEE THE DETAILS ON SHEET 27, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. - \ GENTLY SLOPED AREA AT THE TOP OF THE RETAINING WALL TO SERVE AS A SAFETY \ \BENCH FOR THE DETENTION BASIN. RETAINING WALL TO ALSO INCLUDE HANDRAILS MEETING MINIMUM STATE & - - - \ \ PROPOSED idWIDE TOP OF DAM (WITH A / - - \ `, \ \ " \ �, COUNTY BUILDING CODE REQUIREMENTS. \\ MAXIMUM CROSS SLOPE OF z%)TO SERVE AS \ SAFETY BENCH. TOP OF DAM ELEVATION=728.0'. PROPOSED zo' WIDE GRASS LINED, GRADED x,2 Q+ \ / - ' SWM ACCESS (z% MAX. CROSS SLOPE) PROPOSED35'WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY W/4:1 SIDE SLOPES& FILTER FABRIC UNDERLAYMENT (STONE DEPTH=18"). SPILLWAY CREST ELEV.=726.5o'. / / / ♦ \:`> \ - .'y'.. \ -J \ A A V / 717.E PROPOSED 86' LONG FLAT LEVEL SPREADER 'C'. / �� I • ' A V A � - LSTOHAVE A1i'DEEP PLUNGE POOL &6"WIDE -� \ RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP / ,- \ - PROPOSED STR. C-io7, A 022" LOW -FLOW OUTFALL CARRYING LINING AND A SLOPED S (MIN.) VDOT CL. Al - / \ RIPRAP LINED EMBANKMENT DOWNSTREAM ' I ) THE TREATMENTF012" VOLUME FLOW TO LEVELS IO=_ 1.35) C' 3 .>� / (1z.00 LF OF 0u" HDPE dal 01 1 11=718.y1, 10=718.35) � FROM THE RIGID LIP EXTENDING TO THE EXISTING � \ h / � \�� .. ... .0 GRADE. ALL RIPRAP TO INCLUDE FILTER FABRIC - / d , PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION UNDERLAYMENTS & BE A MIN. OF 18" DEEP. � 6\ 6' / \ WITH FILTER FABRIC UNDERLAYMENT (L=8', W1=3', W2=9', D=i8') 718.35- BEGINNING OF LEVEL SPREADER \ EXISTING 100-YR FLOODPLAIN PER e v1 x \ \\ \ \ \ \ - - ' I 717.1- BOTTOM OF LEVEL SPREADER \ \ 3 / HEC-RAS ANALYSIS PERFORMED � \ \ \ I/ I � �� i I \ °\ BY COLLINS ENGINEERING IN APRIL \ \ \ \ / \ ,(" I Ln 718.1- TOP OF LEVEL SPREADER / \ 2019, SEE WPO 201900027. \ \ \ \ \ \ \ / p \ 2+00 \ STR C-104 PROPOSED 50'x86' CONSERVATION \ \ \ \ \ \ \ -- \ EASEMENT. AREA WITHIN EASEMENT \ SC T' \ }"�PROPOSED VARIABLE WIDTH \ \ \ TO REMAIN UNDISTURBED & TO BE \ I I SWM & ACCESS ESMT. \ \ \ LOCATED OUTSIDE THE LIMITS OF _ V A ,pA DISTURBANCE. EASEMENT PREVENTS V A75 \ WPO STREAM \ V A \ \ \ O \ FUTURE DEVELOPMENT,/SUFFER, TYP.\ DISTURBANCES & SITE CLEARING. PROPERTY \ \\S PROPOSED FLATVDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH \ \ \ \ \ / \ FILTER FABRIC UNDERLAYMENT(L=25', W1=4.5', W2=22.5', D=iB") \ LINE, TYP. A V v GENERAL SWM NOTES: i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON SHEET 27, OR EQUIVALENT FOR INSTALLATION. a. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH .1 SPECIFICATIONS. 3 4 3. CONTRACTOR SHALL HIRE A THIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING AND RIPRAP AND THE REMAINING DISTURBED EMBANKMENT SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ML CL SC OR GC SOILS & BE FREE OF WOOD ROOTS ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND z%OF OPTIMUM MOISTURE CONTENT. ALL EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OFTHE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE SAMPLING. 4. THE DOWNSTREAM EMBANKMENT SIDE SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM 3:1 SLOPE. 5. CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN THE ESC SEDIMENT BASINS AT THE TIME OFTHE FACILITIES' CONVERSIONS TO PERMANENT SWM FACILITIES. AT THIS TIME THE CONTRACTOR SHALL REGRADE THE SEDIMENT BASINS TO THE PROPOSED GRADES SHOWN ON THE SWM SHEETS. THE CONTRACTOR SHALL MINIMIZE SOIL COMPACTION DURING THE CONVERSIONS. 765 CONSERVATION EASEMENT/AREA & LEVEL SPREADER REQUIREMENTS: MAINTENANCE INSPECTIONS: ANNUAL INSPECTIONS SHALL BE CONDUCTED IN THE NON -GROWING SEASON DURING THE FALL AND WINTER MONTHS. INSPECTIONS SHALLTRIGGER MAINTENANCE OPERATIONS AS REQUIRED. MAINTENANCE OPERATIONS MAY INCLUDE BUT IS NOT LIMITED TO SEDIMENT REMOVAL PERIODIC MOWING REPAIR OF THE LEVEL SPREADER AND ENSURING A DENSE HEALTHY GRASS FOREST GROUNDCOVER. MOWING SHALL BE COMPLETED AT LEASTTWICE AYEAR TO PREVENT FURTHER WOODY GROWTH AND SPOT RE -VEGETATION OF THE CONSERVATION AREA IS REQUIRED IN ORDER TO MAINTAIN Ago% MINIMUM COVERAGE RATE. THE CONTRACTOR SHALL CONDUCTTHE INSPECTIONS FOLLOWING THE FIRST YEAR THE PROJECT IS COMPLETED, AND THE OWNER SHALL CONDUCT THE INSPECTIONS THEREAFTER. INSPECTIONS SHALL INCLUDE THE FOLLOWING AT A MINIMUM: i. ENSURE FLOW PATHS ARE NOT SHORT-CIRCUITED IN THE LEVEL SPREADER AND THROUGH THE CONSERVATION AREA. z. ENSURE DEBRIS AND SEDIMENT HAS NOTACCUMULATED. 3. CHECK FOR SCOUR AND EROSION WITHIN THE LEVEL SPREADER SYSTEM AND CONSERVATION AREA. 4. CHECK FOR FOOT OR VEHICULAR TRAFFIC DAMAGE IN THE STONE. S. ENSURE VEGETATIVE DENSITY MEETS OR EXCEEDS go%OFTHE CONSERVATION AREA. IN THE EVENT MAINTENANCE IS REQUIRED DURING THE ABOVE NOTED INSPECTIONS, CORRECTIVE MEASURES SHALL BE COMPLETED IMMEDIATELY. 765 760 A VDOTSTD . B-1 (CONCRETE MANHOLE BASE WITH 048") SHALL SERVE AS I HE RISER's 760 FOUNDA ION. A 48" STA DPIPE ITH A R M ELEV ON OF 747.33' HALL COMPLETE HE STRUCTURE. RIS R TO IN LUDE (1 ONE PE MANEN 06" LOW -FLOW RIFICE ITH AN INVERT LEV.=7 9.75, AN (4) FOUR PERMANENT 1 " MID -FLOW OR11710ES WITH INVERT Lt:VAT .CON TEMPORARY ESC DEWATERING ORIFICES W TERTIG T AT TH TIME F THE FACILITY's 755 CONVERSION. AL ORIFICE OPENINGS SHA -HAVE STATE AP ROVED RASH P CKS, 755 TYPICAL SEE TH DETAILS ON SHEET 27 0 E UIV LENT F R ADDI IONAL I FORMA ION. PROPOE ED io'WI ETOP OF DAM EL V. 750.0' MAXIMUM CRO S SLOPE OF z%). -CONTRACTOR S ALL INSTALL EMBAN MENTI ACCO DANCE / 750 THE DE IGNS S OWN 0 SHEE 27. 750 _ STR. B-1 z p OPOSED FLATVD TCL. Al IPRAP e. VDOTM -i LINED OUTLET PROTECTION WITH RIM=747 5 FILTER FABRIC UNDERLAYMPIT (L=1 ', W1=4.5' W2=8.3', D=18") 745 P ROPOSED745 GRADE 100-yr PEAK WSE=748.92 10-yr PEAK WSE=747.29 STR. Ba 4 2-yr PEAK WSE=745.86 VDOTM -1 1-yr PEAK WSE=745.12 RIM= zoo GRADE of 740 740 G PROPOSED BASIN's FLOOR SHALL M N. BE SLOPED TO DRAIN TO THE RISER (o.5%MIN.) WITH POSITIVE SLOPES TH ROUGHOUT. S R 8-10 , 122.5 LF OF 01 "HDPE 735 @ 0.500/ (II=739.48, IO= 38.87) 735 TO PREVENT FLO ATION T E RISER ASE SH ILL BE FIRMLY ST B-103� 88.9 LF F 018" HOPE @ PROPOSED STR. B-1o5, AN EMBEDDED 6" INTO AN 18' THICK R INFORCE CONCRETE 0.50 / (II=738.77, IO= 38.33) HIGH -FLOW BYPASS OUTFF FOUNDATION TH kTIS 8'x8 AND BU RIED BELOW GRO ND. AVDOT ES-i(46.33 LF OF PROPOSED ETR B-10 , A 012" LOW -FLOW OUTFALL CARRYING-'HDPE @0.50%, 11=738.23, 10: THE T EATME T VOLUME FLOW TO LEVE SPREADER 'B' 730 (75.5L OF 012 HDPE Ca 1.00% II=736. 7, I0=7 5.61) 730 > > J W � N cD U cc 0) d- p I� 0) cD Co. 00 co O W W 0^ 'D M � O O p cc c6 Ln C6 4 0) 0j It W I� � r � r � � ^ r � r ^ r r r LOi 100-yr PEAK WSE= 10-yr PEAK WSE= 2-yr PEAK WSE= 1-yr PEAK WSE= PROPOSED BASIN's SLOPED TO DRAIN TO THE WITH POSITIVE SLOPE TO PREVENT FLOT, EMBEDDED 6" IW FOUNDATIONTH) F 0+50 1+00 1+50 2+00 2+50 3+00 3+50 3+75 SWM FACILITY B SECTION A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE RISER's LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 725.50' SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE (1) ONE PERMANENT 05" LOW -FLOW ORIFICE WITH AN INVERT ELEV.=718.75, AND (4) FOUR PERMANENT 6" MID -FLOW ORIFICES WITH INVERT ELEVATIONS OF 724.5'. CONTRACTOR SHALL PERMANENTLY PLUG ANY EXISTING TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME OF THE FACILITY's CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE STATE APPROVED TRASHRACKS, 740 TYPICAL. SEETHE DETAILS ON SHEET 27, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. 740 EXISTING 735 GRADE 735 CONTRACTOR SHALL INSTALL EMBAN MENTI ACCORDANCE / THE DE IGNS SHOWN 0 SHEE 27. 730 -PROPC SED zo' IDE TOP DFDAM 730 (WITWXMAXIMlJMCRO55SLOPEOF 72697 z%)TO ERVE AS SAFETf BENCH. 726.53 TOP C F DAM EL EVATION=728.0'. 725.43 724.48 STR. C-1 4 VDOT M -1 725 �� RIM=7z4. 4 725 m .. „� PROPO ED C'v y STIR. C-1c z GRAD VDOTM -1 FLOORSHALLBE RIM=7z4. 0 720 RISER (o.5%MIN.) S THROUGHOUT. O 50 I kTION THE RISER BASE SHALL BE FIRMLY CAN 18" THICK REINFORCED CONCRETE ,T IS B'x8', AND BURIED BELOW GROUND. 715 ST . C-zoi, A PROPO ED 018" HDPE BAR REL (45.5c LF OF HE PE @ 0.5 %, 11=718 75, 10=71 .51) JF ROPOSED STR. C- 03, AN 18" HIG -FLOW BYPASS ROPOSED STR. C-io7, A 012" LOW -FLOW OUTFALL CARRYING UTFALL ( 5.00 LF OF 0z8" THE TREATMENT VOLUME FLOW TO LEVEL SPREADER'C' DPE @ .i6.5z) 45%, 11= 19.4z, (12.00 LF OF 012" HDPE dal 0.5%, 11=718.41, 10=718.35) 0 7 7101 > > _J(� O O N O It 04 6_ 0OOJ 0 W W m a0 �m of r7 Nr7 (DZ (ON (.J n n nn r n r n r W L� 0+50 1+00 1+50 2+00 2+50 2+75 SWM FACILITY C SECTION h8" ,LL V L8" '738. PROPOSED 20' WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & FILTER FABRIC UNDERLAYMENT (STONE DEPTH=18"). SPILLWAY CREST ELEV.=748.33'. 755 1 755 idVIDE TOP OF DAM EL V.=750. ', TYP. 750 750 /ITH ROOTS D EXISTING U. G DO) GRAD ADE 745 745 > > O d -i O O O -i W W O O 0 0� r r W W 0+50 0+75 PROFILE SCALES I SWM FACILITY B SPILLWAY 1' =50' (H) PROPOSED FLAT VDOT CL. Al RIPF LINED OUTLET PROTECTION WITF FILTER FABRIC UNDERLAYMENT (L=25', W1=4.5', W2=11.5', D=i8") PROPOSED STR. C-io5, AN Oi8" HIGH -FLOW BYPASS OUTFALL WITH A VDOT E W-i (21.25 LF OF HDPE @1.98%, 11=716.42, 10=716.00) PROFILE SCALES 1"=5' (V) 1"-50'(H) PROPOSED 35' WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & FILTER FABRIC UNDERLAYMENT (STONE DEPTH=18"). SPILLWAY CREST ELEV.=726.5o'. 735 1 735 730 730 725 725 AP // INC- GRADE 720 720 O (O O KuLcacui r'J o0 N (DN a0 N Illn N n I` N n 0+50 0+75 1o' WIDE TOP OF DAM ELEV.=728.00', TYP. PROPOSED GRADE SWM FACILITY C SPILLWAY TT/R. CbLLINSZ No. 35791 11/6/20�1 Zz O Oa K f m w c=i� Z ,a-, O H U) z W w ce H N L- I n D H ZLu w U) O 0C:) N sm F- w (F W a (n JOB NO. 182154 SCALE AS SHOWN SHEET NO. 26 DETENTION BASIN CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS: 1. THE DETENTION BASIN SHALL HAVE TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONAL AND IS NOT REQUIRED. 2. THE PROPOSED INTERIOR SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 4:1, OR 3:1 IF SAFETY BENCHES ARE PROVIDED AT THE TOP OF THE FACILITY, TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES SHALL BE GRADED TO PROVIDE POSITIVE DRAINAGE AT ALL TIMES TO THE RISER STRUCTURE. 3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE. 4. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS TO ENSURE STABILITY THE DENSITY OF THESE COMPACTED SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB, PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. 5. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. CONTRACTOR REQUIREMENTS: 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL ( COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHT TO THE ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY. 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY 0NSITE UTILITIES (CALL MISS UTILITY AT 1-800-552-7001 BEFORE ANY EXCAVATION). 6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INFORMATION. 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN. 9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. 11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE INSPECTOR INITIALLY, AND THEN THE DESIGNER. 13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. 14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENTTO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOTSTOCK. 16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR's CONTROL. FACILITY CONSTRUCTION 1. DETENTION BASINS MAY SERVE AS SEDIMENT BASINS AND/OR TRAPS DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION POND IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN. 2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. S. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THATARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS NATIVE PLANTINGS OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE. 7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESC PHASE. CONTRACTOR SHALL ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL ATTHE DESIGN ELEVATION. 8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8- TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS WITH APPROPRIATE EQUIPMENT. THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED IN TABLE 14.4 BELOW: Table 14.4. Cray Liner specifications Property Test Method Unit specification -1111111 Permeability ASTM D-2434 Cm/sec 1 x 10 Plasticity Index of Gay ASTM D-4231424 % Not less than 15 Liquid Limit of Gay ASTM D-2216 % Not less than 30 Clay Parades Passing ASTM D-422 % Not less than 30 ClaY Corn coal ASTM o-2216 % 95%of stalWard proctlor oeo w SOUI Virginia S10rt11Niater Man3WMem Hir1aDODK(1SIVY) 9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. CONTRACTOR SHALL THEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION IF APPLICABLE. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 13. THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, IF APPLICABLE. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN. 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE EROSION OR UNDERCUTTING. 4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc. 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 7. INSPECT CONDITION OF ALL TRASH RACKS REVERSE SLOPED PIPES OR FLASHBOARD RISERS AS APPLICABLE FOR EVIDENCE OF CLOGGING LEAKAGE DEBRIS ACCUMULATION OR OTHER FAILURES. 8. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING. 10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN(s) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR WITH THE ENGINEER AND INSPECTOR DURING THE FOLLOWING STAGES OF THE DETENTION BASIN's CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS) 4. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(s). 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) S. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE) 6. FINALINSPECTION(DEVELOPAPUNCH LIST FOR FACILITY ACCEPTANCE) StorrrI ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOWN DIMENSIONS IN INCHES (OR EQUIVALENT) PLAN StormltaxTM Round Series for Concrete Manhole Part No. DIII amo WIN Ltin ID Mlnoo It .24 17K 14Y. 78 . 24 30 F 6 219 14 403% 36 43 RI u 54 . 4a 57 RS30 27% 2% 1 6634 60 70 Plastic Solutions, Inc. rLRaER PO Sat 43B6, Vilinc ImRr, VA ZWW Z38 Mortars nd, Winchester VA T2603 ;am 977.5717 phona PRDEC'F ISM 772.2219 fax lediz/A- platic-raWtlm.don HUPF smucrsnl Puenc in PI TICacLUUndsi.M ouAn-EasE r§s - acxareelc 0a,t0ttss ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE QPTIQN$ CROSS BRACING FOR OVERHANG HDPE ANTI -VORTEX PLATE DATE WWN P. APPD BY: DETAIL EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE's SOILS, A SITE VISIT, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DEQ APPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGN PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW AND ON THIS SHEET, MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS AT A MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING &RIPRAP AND THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ME, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. l'OUNTY OF ALBEMARLE Department of Community Development �a'/9]Kt s. Construction Record Drawings (As -built) for VSMP The following is a list of information required on construction record drawings for stormwater facilities reference Water Protection Ordinance 17-422preferable that the ( }. It is construction record drawingbe prepared b someone other than the designer. Please do not P Prt Y g provide design drawings as construction record drawings. A. A signed and dated professional sea] of the preparing engineer or surveyor. B. The name and address of the firm and individual preparing the drawings on the title sheet. C. The constructed location of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the following: L Inspection Records and photographs for pipe trenches and bedding, including underdrains. 2. Video Pipe Inspection for any pipes which are not accessible or viewable. 3. Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area maps for the drainage area trealed, and for drainage to the facilities. 5. Current physical and topographic survey' for all earthen structures. Ponds should include a survey of the pond bottom. Surveys should verify pond volumes are per design. Corrections maybe required for alterations from the design. 6. Plants, location and type. 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the installed of drains structures, culverL/ i size weirsmaterials inlets or end treatment s ►YPe drainage P Pe inlet and outletprotection, alignment and invert elevations compared to design. 8. Computations: For significant deviations from design, provide sealed computations verifying that the as -built condition is equivalent or better than design. eq g 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical sections and linings. 10. Easements- Show all platted easements with dead book references labeled Facilities and drainage must be within planed easements. Provide copies of recorded documents. 11. Guardrail, fences or other safety provisions - Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied end treatments, compared to design 12. Material layers - biofrlter media, stone layers, sand layers, keyways and cores must be verified as to material types and depths. Include inspection reports, boring or test pit reports and materials certifications. Biofilter media must be an approved state mix. 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are re required to verify fill compaction in dams. P9 fS P 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. 2 1/" aloe plated hook attached with 3/a' fastener NV ® ®® �® 1/8" die. Hales Isometri c pipe 1/4' HOPE plate (optional) culvert r.x " HOPSY. . • y.' el holes a plastic will- 2-1/8" LJ holes end 1/4" plate OO manufactured by Plastic Solutions Inc. or equal 00 0000 r.., Wk.•shown with optional pleb x�"``�'"Zy-a�y�r YT x n HDPF structural plastic we'i 2-t/8" holes and 1/4- plots, SecLion manufactured by Plastic Solutions Inc. or equal 5/9" din hole 0 0 o OO o 0 0 C]P 3vP Elevation uri.•ice PLASTIC SOLUTIONS P.O. ass 436e T)FRRTS CAGE rkxaeeYA2zeo4 INC. - B77 877-6727 m.pleelt-eduioernm SECTION A-9: TYPICAI. GRAPHICAL DETAILS Homogeneous fill F- - --------� ' I 4' min �11 Cut off trench-s' below suitable I material I Sail or rock L - - - - - - - - - - - TYPICAL HOMOGENEOUS EMBANKMENT Transition Fill ock or gravel 'Pipe outletCoa fI r ; Perforated collector oroun s0 s L9 lanket drain Foundation drain FOUNDATION DRAIN BLANKET DRAIN /� y Cram Send, goad w rod draw "W Rode or ghost Rak to 4rCil1 �zTI-onaitlDn filter Tron3ition Filter CHIMNEY DRAIN TOE DRAIN Sourre: SCEngineeringField Afanual Figure A -la. Sontogerteons E7»bayt*wents wlSeepage Controls VA UCP_D)�STORM WATER DESIGN SPECIFICATION NO. 2 SHEET FLOW TO FILTER OR OPEN SPACE KEY LEVEL SPREADER MO EXISTING GRADE RIPRAP PLUNGE POOL RIPRAP APRON - - Tp, _ 016 8" TREATED 1 P% TIMBERS OR i6. CONCRETE LIP Al _IV Uvti ER it LENGTH OF LEVEL . T+ LIP TO BE BATED ON DESIGN FLOW DESIGN FL I� I AND ALLOWABLE VBOCITY .:y TOP OF LEVEL SPREADER SHALL BE FLAT 1-3 IN. COURSE AGGREGATE~ OR OTHER LINING AS DESIGNED FOR STABILITY PLAN VIEW DIMENSION BASED ON UNDlSTIJ11 o EXierr,ul ORADE DESIGN DISCHARGE5%(20:1) OR LESS. IF%EQk7ATED FLTIM STRIP Oa CONSEFN® 2' MIN O4RPGN SPP6 FIRST tU FEET LISS 3 MIN I 1D MIN i 3 MIN n 12" i •I MIN DEPTH TONES O REOUIREC STONE SIZE II 1 I SECTION A -A Figure 2.4: Leve1.Spreader: Pipe or Channel Flow to Filter Strip or F Construe Open Space STORMWATER MANAGEMENT FACILITY IDi DETAIL, SCALE 1"=30' \ \ EXISTING 100-YR FLOODPLAIN PER ED MA BYCCOLNSNALYSIS NGINEERNG IN RIL \ \ 2019, SEE WPO 201900027) -,L PROPOSED io'WIDEGRASS- \ LINED, GRADED SWM ACCESS PROPERTY LINE, TYP. \ \I �� \ (2%MAX. CROSS SLOPE) / I P.R6POSSEED VARIABLE WIDTH I SWM & ACCESS E MT. Y S D+00� SEE THIS SHEET FOR / SCALED PROFILES OF THE SWM FACILITY, TYP. / I \ / PROPOSED 20' WIDE VDOT CL. AI / / / RIPRAP LINED EMERGENCY SPILLWAY / / / mow/ 4:1 SIDE SLOPES &FILTER FABRIC .7v��/ UNDERLAYMENT(STONEDEPTH=18"). / SPIL.LWAYCRESTELEV.=7oo.75'. Cq/ / JI p+50 PROPOSED 1a'WIDE TOP OF DAM ELEVATION=702.0' (WITH A / MAXIMUM CROSS SLOPE OF 2%). / ­ / QO� / / PROPOSED SWM FACILITY'D' RISER (STR. D-100). SEE / PROFILE ON THIS SHEET FOR DESIGN INFORMATION. / / TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY / EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE \ \ FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. LEVEL SPREADER NOTES: 1. FIRST 10'FROM LEVEL SPREADER LIP MUST BE 2%OR LESS. 2. TIE BACK ENDS OF LEVEL SPREADER INTO THE SLOPE TO AVOID SCOURING, �C PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (o.5%MIN.) WITH POSITIVE SLOPES THROUGHOUT. 11. l PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC r� ^ / -- - / UNDERLAYMENT IWi=6', W2=6', D=18") - - c1 / ® - S° r UO �\ \ -A PROPOSED 64' LONG FLAT LEVEL SPREADER / ,PROPOSED 012" LOW -FLOW OUTFALL CARRYING THE 'D'. LS TO HAVE A I2" DEEP PLUNGE POOL& O S 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT \ J TREATMENT VOLUME FLOW TO LEVEL SPREADER'D' I CL. Al RIPRAP LINING AND A SLOPED 3' (MIN.) ^ ,� V (55.2S LF OF 012" HDPE @ o.5o%, 11=694.84, 10=6 14.73) _� \ / V 0a / ✓ / ✓/I VDOT CL. Al RIPRAP LINED EMBANKMENT \ 6, a PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION __ DOWNSTREAM FROM THE RIGID LIP / �4i / WITH FILTER FABRIC (UNDERLAYMENTL 8', W14, W2=9', D-28") III \ EXTENDING TO THE EXISTING GRADE. ALL (COO /'' RIPRAP TO INCLUDE FILTER FABRIC /- / / UNDERLAYMENTS & BE A MIN. OF 18"DEER 694.73- BEGINNING / / GIII / 694.0 / OF LEVEL SPREADER - / / = H / 693.8 0 693.5- BOTTOM OF � / / �I �\ 693.0 `7 p / /LEVEL SPREADER / / III-II�I11 / / \ / 90 / i // . )"/ /I / /WPO' STREAM PROPOSED 5o'x64' CONSERVATION \ I / � 694.5- TOP OF / B�JFFER,--TYP. EASEMENT. AREA WITHIN EASEMENT _y � // / LEVEL SPREADER TO REMAIN UNDISTURBED &TO BE LOCATED OUTSIDE THE LIMITS OF DISTURBANCE. EASEMENT PREVENTS 115 FUTURE DEVELOPMENT, 692.4 _ PROPOSED 100-YR FLOODPLAIN°ePER HEC-RAN DISTURBANCES & SITE CLEARING. \ - I/ / / -'ANALYSIS PERFORMED BY COLLINS ENGINEERING \ o1 IN APRIL 2019, SEE WPO 201900027) \ \ \ 710 PROPOSED io' WIDE TOP OF DAM ELEVATION=702.0' (WITH A MAXIMUM CROSS SLOPE OF 2%). 705 CONTRACTOR SHALL INSTALL - EMBANKMENT IN ACCORDANCE w/ THE DESIGNS SHOWN ON THIS SHEET. 700 EXISTINI GRADE A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE RISER's LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 699.75' SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE (1) ONE PERMANENT 02- Z" LOW -FLOW ORIFICE AT THE STUB PIPE's CONNECTION TO THE RISER, WITH AN INVERT ELEV.=694.94'. CONTRACTOR SHALL PERMANENTLY PLUG ANY EXISTING TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME OF THE FACILITY's CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE STATE APPROVED TRASHRACKS, TYPICAL. SEE THE DETAILS ON THIS SHEET, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. 705 ON THE RlStK PROPOSED 20' WIDE VDOT CL. Al BASE SHALL BE FI RMLY EMBEDDED RIPRAP LINED EMERGENCY SPILLWAY 6" INTO AN28"TF ICK REINFORCED 100-yr PEAK WSE=700.91 w/4:1 SIDE SLOPES&FILTER FABRIC CONCRETE FOUNDATION THAT IS 10-yr PEAK WSE=700.28 UNDERLAYMENT(STONE DEPTH=18"). 2-yr PEAK WSE-699.99 SPILLWAY CREST ELEV.=700.75'. B'x8', AND BURIED BELOW ROUND. 1-yr PEAK WSE=699.74 700 705 I 705 695 PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT(L=9', Wi=6', W2=6', D=18") PROPOSED STR. D-ioi, A HIGH -FLOW BYPASS 24" HOPE OUTFALL WITH VDOT ES-i (48.66 LF 690 OF 024" HOPE @ o.5o%, 11=696.24, 10=696.00) PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (0.5" 0.507 MIN. WITH POSITIVE SLOPES THROUGHOU PROPOSED 06" STUB PIPE (STR. D-io5) TO DRAIN SWM FACILITY'D' LOW FLOWS (12.00 LF OF 06" HOPE Qa o.5o%, 11=695.o, 10=694.94). STUB PIPE TO INCLUDE ATRASH RACK AT THE UPSTREAM ORIFICE OPENING. PROPOSED STR. D-103, A 012" LOW -FLOW OUTFALL CARRYING THE TREATMENT VOLUME FLOW TO LEVEL SPREADER'D' (55.25 LF OF 012" HOPE Lai o.5o%, 11=694.84, 10=694-73) J J Do M N 00 O W W In O N io Ui CC)L6 CD d' ED T ED O O W lei PROFILE SCALES 1"=5' (V) 1"=50'(H) 2+00 1+50 1+00 0+50 SWM FACILITY D SECTION i MIN. r. 700_147.700 20' XISTIN GRADE 695 1 695 JJ W W N � C)O N N cc O p O W LL 0+50 -io' WIDE TOP OF DAM ELEV.=702.00', TYP. PROPOSED GRADE SWM FACILITY D SPILLWAY TT/R. CbL] No. 35791 11/6/20 r/ Z Z k Oa U on / w Ln 0 V Z ,a., �rrM� O H in z W CD W N H � W W Z 0 z in Z J J U ti co 0� N to N C) Lij N J J C0 LU U LLI U) UJJ Lij L.L LLI Lf. rL1 V O N z ^< 6.L 1 W Uj 0^ V z Q W 0- V / II LU z LU LU LU L.L 0 , V J I� I� I� F---I H W Q i2 H w LF w a N 182154 SCALE AS SHOWN SHEET NO. 27 PLANTING SCHEME FOR EVERY 400sf (OR 20'x20' SECTION) SHALL CONTAIN THE FOLLOWING: THE WATERSIDE 50% OF THE BUFFER: / / / / / \ \ �' x"� / C ONE (1) 1 - 2" CALIPER CANOPY TREE OR LARGE EVERGREEN AT 6'OSCOTT R. IINSZ TWO (2) "- 14" CALIPER UNDERSTORY TREES OR EVERGREENS AT 4' OR ONE (1) UNDERSTORY TREE AND \ / \ ;. O U No. 35791 � TWO (2) LARGE SHRUBS AT 3' 4' THREE (3) SMALL SHRUBS OR WOODY GROUNDCOVER AT 15"-18" 11/6/20 THE LANDWARD 50% OF THE BUFFER: h � BARE ROOT SEEDLINGS OR WHIPS AT 1,2010 STEMS ACRE, APPROXIMATELY 6' O.C. x NAL �\ \ (600 MINIMUM PLANT SURVIVAL REQUIRED AFTER TWO GROWING SEASONS) OR CONTAINER GROWN SEEDLING TUBES AT 700 PER ACRE, APPROXIMATELY 5' O.C. (490 MINIMUM PLANT SURVIVAL REQUIRED AFTER TWO GROWING SEASONS) PLANING NOTES: 1. ALL MITIGATION PLANTINGS SHALL COMPLY WITH THE RIPARIAN BUFFERS GUIDANCE MANUAL BY CBLAD. 2. ALL MITIGATION AREAS SHALL BE PROTECTED BY A MAINTENANCE AGREEMENT. 3. DCR's RIPARIAN BUFFERS MODIFICATION & MITIGATION GUIDANCE MANUAL DEFINES A CANOPY TREE AS A TREE THAT REACHES 35' IN HEIGHT OR LARGER WHEN MATURE. THE MANUAL DEFINES AN UNDERSTORY TREE O Lp AS A TREE THAT MATURES TO A HEIGHT OF 12' TO 35'. A LARGE SHRUB IS DEFINED AS A SHRUB THAT _ - x REACHES 10' OF HEIGHT OR GREATER AT MATURITY, AND A SMALL SHRUB IS DEFINED AS A WOODY PLANT �� �� THAT CAN REACH UP TO 10' OF HEIGHT AT MATURITY.Am ❑ I \ I / i / / --� � / Via, y%�_ / / STREAM BUFFER MITIGATION NOTES: THE EXISTING STREAM BUFFER ON -SITE IS HEAVILY WOODED, SO TRADITIONAL MITIGATION PLANTING CAN NOT BE ACCOMPLISHED. THIS PLAN PROPOSES THE FOLLOWING MEASURES TO MITIGATE IMPACTS TO THE EXISTING STREAM BUFFER AND FILLING IN THE FLOODPLAIN: , \ \ / / �� / \� - / / / // // ' zo a 1. THE CONTRACTOR SHALL REMOVE THE EXISTING CONCRETE DAM IN POWELLS CREEK, AS // / \ / // ' / F r SHOWN AND NOTED ON THIS SHEET. THIS PLAN PROPOSES TO REMOVE THE CONCRETE DAM THAT IMPOUNDS WATER IN POWELLS CREEK (NORTH OF THE PROPOSED TRIPLE BOX t�mn CULVERT CROSSING). WITH THE REMOVAL OF THIS DAM THE NATIVE STREAM FLOW PATTERNS WILL BE RESTORED. THIS WILL HELP RESTORE THE RIPARIAN HABITAT THAT HAS BEEN ALTERED DUE TO THE DAM CONSTRUCTION AND ALLOW AQUATIC LIFE TO TRAVEL UP AND DOWN THE STREAM BED, RESTORING THE NATURAL PROCESSES CURRENTLY IMPACTED BY THE DAM. / / / ---_ _J 2. THE CONTRACTOR SHALL ALSO PROVIDE STREAM BANK STABILIZATION WITH ARMORING TO V iii , / / / / / �i� �— �� / �" l W PROTECT THOSE AREAS ALONG POWELLS CREEK WITHIN THE PROPERTY WHERE EXTREME / // / \� / - / / / EROSION IS PRESENT, NOT TO EXCEED 100 LINEAR FEET OF STREAM RESTORATION. / ` 3. IN CONJUNCTION WITH ITEMS #1 AND #2 ABOVE, THE STREAM BUFFER SHALL BE RESTORED \ IN AREAS ALONG POWELLS CREEK WHERE TREE COVER IS MORE SPARSE. MITIGATION r PLANTINGS SHALL NOT BE REQUIRED TO EXCEED A TOTAL PLANTING AREA OF 44,175sf (EQUAL TO 1x THE PROPOSED IMPACTS WHEN MITIGATION ITEMS #1 AND #2 ABOVE ARE COMPLETED. ) \ / / i ✓ / / �i f - 4 / / �\ / ��� 4. ITEMS #1, 2 AND 3 ABOVE WILL RESULT IN PLANTINGS THROUGHOUT THE POWELLS CREEK \ / / \ ���✓✓✓ / / / i / / J _ \ \ J/ �� STREAM BUFFER AND WILL MITIGATE THE IMPACTS FROM THE CONNECTOR ROAD CONSTRUCTION STREAM BUFFER PLANTINGS DESCRIBED ABOVE IN #3, AND BELOW IN #5, SHALL BE IN ACCORDANCE WITH THE 400sf PLANTING SCHEME SHOWN ON THIS SHEET. 4. AN ALTERNATIVE TO ITEMS #1, 2 & 3 ABOVE WOULD BE TO REMOVE INVASIVE SPECIES AND TO PLANT A TOTAL MITIGATION AREA OF 88,350sf (EQUAL TO 2x THE PROPOSED IMPACTS). - IN THE EVENT THIS OPTION IS SELECTED, REQUIREMENTS #1-3 ABOVE CAN BE WAIVED. f PROPOSED TRIPLE BOX C�JLVERT (NOT PART OF TH_3?LAN AT, / POWELkdREEK CROSSING WITH THE co o / < / V ❑ - O / / / V /� / A -� PROPOSED CONNECTOR ROAD Orj 4., F� f�sED IMPk1CTS // 14,729sf TOTAL THE �� l / ! / co ( ) TL1P §6A1 Ol 2� l A �TMP 56-115� WPCj BUFFER f - f / K FRO THE PROPOSED - - - ` - �OO' :Po \ ✓ ) / N PHAS��DEVELOPMENT------- _, \ /- / �' - � � � � \ BUFFER, TYPJ � / // / � 2,j�E 1 " / i<� \ V /� �/ / V % // / ❑� LIl]IT9OFPOWE ii� i CRE�TYP� �� l III /�/ / / � PROPOSED IMPACTS I � " �^' /, � u . r / ) - _ / � � %i ❑_ �� - ������ �� � \ CL �� . -o AAA\ _. _ _ _ / � i Ile l J_ / P �AA� v _ J —_� �\ _ �4/4 175sf� TO THE 1�P0 � UFFER ART OF\ / s CONNECTOR AD VSM� �� Qn l A_o / �/ / i l/ LANEWP02�900027) r i \ / �/� ❑ /V / , `, ' / // / / / / /// / _ _ A A� �� ��A� I \ - VA Ito 0 ��� TM - / LLI Q L91 ❑ i / 1 i / 5 1 PROP D IMPACTS / / — — — — "� �� �� ��� �� �� A / S / / �\Tl1P--55C-03-A1 Y4,72�sf� / / TOTAL) TO THE � � // � /�P��4IFFERRESULTING� � /// �—�— � � ❑❑�A �_ � � v��A --- � — � .� �// �� � /// I � Q v � t FROM HE PROPOSED///� I ---I W PtiAS�II DEVELOPMENT / // � / / / / v -� C7 / /-V ° / / /l/ STEEPLu S TMP 55C-03-A� / / / // ❑� // A / // ��:" �� �/� // /// / ///9 \ / � EXISTING CO C E/OAM PROP SED TO BE , A / / / / / i / / / r REMOVED. G EN��ITS�LOSE�R/� PROPER LIMITS,JHE CONT A 0 HALL / / / / \ W�0 STREAM BUFFER � - � / / � / / � � � 0 W Lu ST KE CONFIRM, PROPOSED DEV LOPMENT's PROPERTY LIMITS &THE E TINGE DAM PRIOR TO NS CTIONy CON RUCTION ACTIVITY A TED TH THE/ / / / _ - ; �/ �// �/ / l ui D REMOVAL SHALL BE L E THE ITE / > / - - - / / /i i / / O TAX MAP PARCELS 5- 5C / / / / s / / / / / - - / / i /i i L \ / � Y / A / '� ---T - / / / -----/ \ �\ 0 Lu COUNTY DE / SERV STEEP SLO 0 REM- / ) ❑ / / / / _ i / = - PROPOSE IMPACTS TONAL) TO E WPO BUFFE RCS IN / CD b O �RO E P CD SED \ \ C> N / \ / / /w WPO / / 7i�� PHASE I DE NT \ / EXIST G CCOONCR�TE DAM A !f EXI G 12' WID x 8 HI �� FFEP TYf. / pR POSED TO �E REMO�/ _ A / / ti ( BOUNTY IN PRES ED D L BOX CULV / / / �� \ a - ✓ / / j _ LI TS OF POW LS STEE OPE 0 I P. OWE EK CROSSING � +✓ � � � � �� / _ /i � ITH EXISTJNG CLING LANE �� // / i ( \ \ / - CREEK, TYP. \ / A \ EOM w Lu i Lu TMP 55C-63-B� / TM� 56 115 - - 15�1NC'P�A a uzi JOB No. PROPE LIMITS, V /\ 182154 SCALE SHEET NO. 28