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WPO202000053 Plan - Submittal (First) WPO VSMP 2020-11-24
.1M /4`/21i"mid,181VI 111 1 OWNER: STANLEY MAR77N COMPANIES LLC 11710 PLAZA AMERICA DRIVE, SUITE 1100 RESTON, VIRGINIA 20190 DEVELOPER: STANLEY MARTIN HOMES 404 PEOPLE PLACE, SU17E 303 CHARLOTTESOLLE, VA 22911 ENGINEER: COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOTTESWLLE, VA 22902 (434) 293-3719 TAX MAP NO.: PHASE I 056A1-01-00-02900 (13.49 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 056AI-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 11 = 21.02 ACRES TOTAL AREA PHASE 111 = 4.96 AC ZONING: R-6 RESIDENTIAL, STANDARD LEVEL - CLUSTER DEVELOPMENT PROPOSED USE: SINGLE FAMILY ATTACHED RESIDENTIAL 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 EXISTING COND177ONS SHEET. BUILDING HEIGHTS., MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET SETBACKS: FRONT.. 5' MIN/MUM (25' MAXIMUM FROM R/W 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: L/CKINGHOLE CREEK WATER SUPPLY WATERSHED AGRICULTURAL/ FORESTAL DISTRICT: NONE TOPO & SURVEY. THE BOUNDARY LINE, PARCEL /NFORMAT70N AND TOPOGRAPHY WERE PROVIDED BY ROUDABUSH, GALE AND ASSOCIATES /N JANUARY OF 2019. INFORMAT70N WAS FIELD VERIFIED BY COLLINS ENGINEERING /N JANUARY OF 2019. DATUM: NAD 83 EXIS77NG VEGETA77ON: PAR77ALLY WOODED WITH (2) RESIDENCES ON THE PROPERTY AND EXISTING GRAVEL DRIVEWAYS. LIGHTING: NO STREET LIGH77NG IS PROPOSED WITH THE DEVELOPMENT. ALL PORCH LIGHTS MUST MEET THE REQUIREMENTS OF SECT70N 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 SEC77ON 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 POR77ON OF THE PROPERTY IS LOCATED M7H/N 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 SITE PLAN ALONG THE NEIGHBORHOOD STREETS /N ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS SET FOR7H IN SEC77ON 327.9 OF THE COUNTY CODE. TRASH., EACH LOT SHALL HAVE AN INDINDUAL TRASH CONTAINER. IMPERVIOUS AREAS: PHASE I EXISTING BUILDING & STRUCTURES 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 /MPERNOUS AREAS 10,650 SF EMERGENCY ACCESS ROAD 11,575 SF TOTAL 198,395 SF (4.55 AC) PHASE lI PROPOSED ROADWAYS 85,500 SF PROPOSED SIDEWALKS 30,800 SF PROPOSED BUILDINGS 142,440 SF PROPOSED DRIVEWA YS 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 = 1315 AC CONNECTOR ROAD LIMITS OF DISTURBANCE = 1.90 AC PHASE ll & III LIMITS OF DISTURBANCE = 16.99 AC OFFSITE_ EASEMEN T• ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR WITHIN EXISTING RIGHT-OF-WAY. NO OFFSI7E EASEMENTS ARE PROPOSED WITH THIS DEVELOPMENT NOTES 1) 7741S PROPERTY DOES NOT LIE W1774IN AN AGRICULTURAL AND/OR FOREST DISTR/CT. 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. PLEASANT GREEN VSMP PLAN AMENDMENT TO WP0201900003 WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGINIA I 119 '� 11 , \ ' ❑ II � '1 cl PHASE II ! I � � -T- 1 \ �' iLAL FUTURE PHASEI PHASE III��� FUTURE PHASE III J /� . �pIVATC ALLEY PHASE II (�' 7 I- PHASEI '\ 9y/ J \� f- 0 : i I j H I i i�-- - - i -. PEACH TREE DRIVE ❑' cl Q❑ - �\> I i � I % a \\ ��/ lip SHEET LAYOUT SCALE: 1" = 150' LEGEND 0 EROSION CONTROL PLANWETR/CS EDGE OF PAVEMENT 200 PROPOSED CONTOUR SA SAFETY FENCE 301 OP OUTLET PROTECT/ON 31B CURB � SEDIMENT TRAP OR BASIN CRS O CONSTRUCTION ROAD STABIL/ZA77ON 3.03 RR RIPRAP 3.19 SOIL BOUNDARY DRAINAGE DIVIDE BUILDING CE CONSTRUCTION ENTRANCE 302 RR UTILITY STREAM CROSSING 3.25 PROPOSED ASPHALT LIMITS OF CLEARINGIGRADING SF SILT FENCE 305 SAF TEMPORARY SEEDING 331 STREAM BANKS LIMITS OF DISTURBANCE DIVERSION DIKE aINLET PROTECTION 307 PS PERMANENT SEEDING 332 100' WPO BUFFER PROPOSED EASEMENT, RIGHT-OF-WAY DIVERSION _ _ _ TREE .PROTECTION OD TEMPORARY DIVERSION DIKE 3.09 TP TREE PRESERVA77ON 338 ® VARIES WITH SHEET DRAINAGE PIPE SAFETY FENCE RWD TEMPORARY RIGHT-OF-WAY 311 DC AND PROTEC110N DUST CONTROL 339 BENCH MARK -C-X—X-X—X-X— SILT FENCE DIVERSION _ _ -- PROPERTY LINE VDOT STANDARD STOP SIGN ST TEMPORARY SEDIMENT TRAP 313 a VIRGINIA EROSION & SEDIMENT CONTROL PROPOSED HANDICAP ' ' PROPOSED CONCRETE SB SEDIMENT BASIN 3.14 HANDBOOK SPECIFICATION NUMBER O PARKING SPACE STRIPING INLET PROTECTION 100 YR. FLOODPLAIN RIPRAP, OUTLET PROTECTION OR CONSTRUCTION ROAD - - - EXISTING CONTOUR STABILIZATION VICINITY MAP �} SCALE: 1" = 2000' :-' LAUREL HI L L S CROZET ,a-n CROSSING GRAYROCK pa WAYLANDS ° 1�lAYLAND PART. 1 GRANT ,zoe SITE Starr H(II Brw Crozet z� REA PARKSIDE I VILLAGE cards Q Old Trail Golf Club 9 ,2074 PARK VIEW �'. BROOKWO Sheet List Table Sheet Number Sheet Title 1 COVER PHASE EROSION O SEDIMENT GGNTRGI NOTES, NARRATIVE O BETAII 6 - --a- STE)RMWATER MANAGEMENT BETAILS 48- 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. LINSZ No. 35791 n 11/6/20 �,rj y Z C) 1 _ cM Ch N 00 M I � i w N O N N t� Q LU J J LU Q LU Z LU LU U) JLU Q • • AM U w ru 0 w a � 30B NO. 182154 SCALE AS SHOWN SHEET NO. 1 -\ ------ - -- - -- -- - ----- IT�I rnTrrl-1-#+Lu. 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T TO BE REMOVED WITH = DB 5226, PG 309 UTILITY PLAN - SUB-zol9-0007i y C3 � r/ ' � ' ear N E RIT ZE ,MISTY DARNELL. r PHASE II CONSTRUCTION STORY FRAME / 0°�_-� sa 2 PC 12 . N CRAWL/ -- --- �I �zo PUBLIC DGRAINAGE EASEMENT V DB 576 PC 3 PLAT) PARTIAL CELLAR -._ - .r, D.B. 5264, PG, 297 :=�� �_ R6 TMP 56AEXISTING SANITARY SEWER 1 -1- EASEM NTTO BE VACATED `\ C2 '� N/F PIR Y, S H L. �� OR T SA F. TO BE REMOVED AND EXISTING STANLEY MARTIN COMPANIES LLC �� PHASE LINE (TY D B 5a64, PG zg7 , .� - m P'I zo' PRIVATE DRAINAGE EASEMENT ° 1 ✓� \ �, � V� - ` BM 1 DB 2143 PC \ rgff 13-0 ac. - "� - a \ \ TOP MH=72 .53 DB 1550 PC 23 (PLAT) / TMP 056A1-01-00-02900 D.B. 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W _ J _ 26 PC 309 EXISTING FENCEEXISTING SANITARY SEWER - / ✓ \ \ AND EASEMENT TO REMAIN T /is/ '' ---- - ��X _-` --------- -- =-..�. / ,. c000 ® ® ® EXISTING ioo WPO-- -- - - - --- STREAM BUFFER = o®0®® - - FROM STREAM BANKS, CONTIGUOUS - ®o® --- -"--- WETLAND AREAS ANDioo'FLOODPLAIN EXISTING FEMA - - o s -- -- ® Leg _ , , , - - - �`l ®o ioo YR FLOODPLAIN ® o® �� \. / �: i / \ to ` 0000®�® 000 0 i Mom, -- \ - -- � - o a A - - / ' ®� m - \ a 0 ` , --- -- m \� ®® ® ® o® 0000® ® ` oo® EXISTING WETLANDS „ / -� ®® ® - �!' .' '' __ ®o s EXISTING COUNTYDEFINIEDPRESERVED ® ®� coca - -�-- ° i /" , a -STEEP SLOPES TOREMAIN(TYP) s i o ® o000000® ® ®-- 1 y e, o® coca ®® cocoa® , O s - -� - ✓� /� --`-- ®� �00000®oo`oo®oo®000®o®o ® 000 -- L B - ®oo -- - '' ��'3 ®, s�_ oo®� - -EXISTING WETLANDS- - - - - ' / fig,\ cocoa, / STREAM - do i i y ono - - -- - _ 0 cc 000�st�o o� -_ - �- 0 coo 0000. I /.> ,` ® ®® � � om.�o®o®ooe � ors_ _� - 000------------ 0--- ----- ---- _ ®o 00000 L 6 000® ---- - _ - - - - - 000 ®®000-�o�o�T® �t = -- / - o® - \ - -- -- ---- / C \ , �OZI _ �-- _,. i' �' �' r _ -_.J•. J.J`titi--� ;>`,, s��., ----- - ` _ S�-'� --- --'- ------- - - - - -- - ---------- -ems• �-- ' � I l \ , r _ _ 1 41 I I I A \ LL I ) 7 1 /� , I � I I I I I j I I I ❑ I i lI � \ ILLIL Curve Table Curve# Length Radius Delta C1 146.799 172000 048.9008 Cz 352.277 228.000 088.5262 C3. 19.971 12.500 092 5408 C4 42:.052 200.500 0120170 C5 225.685 3o6.5oo 042.1B86 C6 13.883 333 500 002.3951 C7 15,129 23 500 036.8852 250500 . o b. CB 33 3453 4995 C9 50043 524,500 005.4667 C1° 27.510 12.500 080.2608 C21 3a.864 225.500 oo8.o96z C12 13.612 485.5°0 oo1.6o64 ADJACENT PROPERTY OWNERS INFORMATION TAX MAP PARCEL NUMBER OWNER ZONING ACREAGE 56A1-05-00-000A0 STANLEY MARTIN COMPANIES, LLC R-6 4.24AC 56A1-01-00-030A0 STANLEY MARTIN COMPANIES, LLC R-6 0.50AC 05600-00-OD-11500 VUE REALTY PARTNERS, LLC R-6 21.85 AC 055CO-03-00-000BO CROZET CROSSING COMMUNITY R-6 4.18AC 055CO-03-OG-01900 055CO-03-00-02000 055ca03-00-02100 055CO-03-oa02200 055CO-03-OG-02300 i TON, JASON RYON R-6 0.28AC 4002/047 \ i - - - IARSON, ELLEN M OR ROBERT M R-6 0.27AC 3472/007 SBURY,BONNIEL R-6 0.27AC 1444/206 -LE, SERGEOR PENNYCHANG R-6 1 3392/158 MER,SHIRLEYH R-6 0.29AC 1337/295 =NLEE, CLYDE V OR CARRIE L R-6 0.30AC 1352/322 No. 35791 11/6/20 Z J O Q iL U m W Ln O � Z .Q-, O I- m z CC F N o �-J ONAL 0) ti M C) CV 4 W " 0 C\I W < z W -JJ I_I.l L9 z0 U W? 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PG 309 RIVATE Y \ , _ '`-r - BOUNDARY ❑ = / / \ -� PLEASANT GREEN I Y PHASE II & III \ o ,, LINI�TS,OF � ,_ si -��� � ,- --' / ; - , ' � _„ LIMITS OF DISTURBANCE w r� 1,. - DI TIIRBANCE (1 5.0 AC) `� /' (16.gg AC) I PHASE II , �❑ i .r , I STANLEY MARTIN �- ___ STANLEY MARTIN x Lx ��A ___ __ ❑ COMPANIES LLC ., PLEASANT PHASE IRE -- ❑ COMPANIES LLC x / - ;, _.. - 's--.--- ____- �:' / _ i TMP OS6A1-01-00-02600 WP0201900003 -- _ _-___- - ---- TMP 055CO-03-00-000AO `�� /< 4.744 ac. _ - V v " ---- __ 16.2E ac. _ / ��LIMITS OF DISTURBANCE r I = s4. - --. - ' ---------- ------ .' ,-a"' / - _ - , DB 5226, PG 309 _ = '---'� ---- _ DB 5226, PG 309 ,. �_�---� i---_��- _. - - - I 3 / y— - -lf- -------""'--" /,•' o° _ o0o 0000a '{ > . 1\ 1 ' ( 5 AC) — »-- — f _-- .__-- - eG000000G 000000sao Gooae00000 oo omea000000e 0000 ooGa _ A e ' — - - -= _ - _---- _; � oac aeoemooaGeaa O __ Z - - °o _ o JJJ ------------ PHASE LINE \ \ � \ N _—T G om ,p° x 40aaa '-\ / - i°OOB000meooem ,,e co' ao 00000a oe�a'eo mo ° °oma oeooao ooa Y - ao oe000000eeoeaoc00000meoe0000 0 atl 'pO oOO i oOOD o°�a - -_ - ____ -_ - oaeo -- o �, , �C .� _.,. � .,-' -•' 1� ��`�-v.>-/❑. � �- , PROPOSED LIMITS OF--- e a -- \ DISTURBANCE (16.99 AC) ° ` , mesa® a mG000a000mooGGe000 oa G - �. - Oa �c °e, ' ; i em o°ao a,Gaao oe \ O N % c° .ti �I w N � o 'OO\OGom�e . 1-; _3 o\ oooaCor .oro_eesoo s Dpao°opo°,G,°o° pO L°�°ao°m_ a- e-_o - o_ m_maomaOa9Ga GOea00ma°O o oeom.. - aoo- o-°.o.io_o'oa" aaama -_ - -a-- oa aaoaao _e-- o-e_-o- -G oesoe.a m a_ oooo-e000 _.oaaaa Qaea _/- /• / - - __-_ - - — \- `-_ \ 1/ Go\o°la' a°aepo°maG pamPR°6O°JO ECT -I�---�- 1-v Z J w> BOUNDARY A rn ---------- LLi -------- - _ _ - _--- - - _ - _ PROJECT � - --- -- u- ,}is'-'F'ch-csr ♦.. _ -'�� -� ❑4\' °%o STANLEY MARTIN °"ma ❑ J G BOUNDARY T e1 V m - _ < � ' s �COMPANIES LLC J_ II -- II I L Ij 'L II _-- -_1 Ii I ---- I- - — - �flJ _❑I — �I I i II I�I I _1. ✓,-l�Iµy1fI _��--_�I TM\e P°6A1 0o1-�00°-°a0a3a°0A0ea° eQ O ral; i � - - /\ _ -_ `-- • �°-Oae (ILr� o�'_-T0.50 DB 5226, PG 309 � SANT �0 GREEN _�.�_—_---- e ,V CV ) CONNECTOR T�\ 0 LL . �ROAD Q W O/ WPOaS00027 w LIMIT OF DISTURBANCE o 2Ac D E REE RIV — - --- ❑❑ / a °mm, e ° — mama° � H T J �I — °° a °a -FLI G� °OOOGoeam°° V)W I _ --- — ED]/� A R ARD DRIV a r _� - — \ 11�� II � � - 0 CH -� ` '� �� ul ❑ / — �> ❑ Z w W J ---- ❑ I ------ —'�--- — — I ❑'' �'V \// J \ ❑ --- ° ---- Lam' I , O I A /' I PLEASANT x GREEN W — — — ❑ ❑ O - I /� \ O - CONNECTOR \ <\ J W ROAD ❑ I %" - WPO201900027 I I ❑ \. ❑O \• / / LIMITS OF J DISTURBANCE // Q ❑ ❑❑ ❑� O Do CNI , ❑ - ------ ❑ ❑ ❑. 1 I U , I ; II I I Ll A ❑ �' 1� .y= ❑ r I ' � I I ❑ i i �II�IIITVT s E I i I 1 ,;\ ❑ .� ''y�� ,�,. .\ ,\\. �. I 1 `❑`♦ i ioo ' so , i o I zoo I I aooi I I � � \ / _ \ ❑ I 1 I IN ET -- 1 inch l0fl.LLLJJJ I I r � w w a V) JOB NO. 182154 SCALE 111 = 3.00� SHEET NO. 13 2 EROSION do SEDIMENT CONTROL EROSION CONTROL NOTES DESCRIPTION OF EROSION & EROSION CONTROL NOTES & NARRATIVE MEASURES: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE SEDIMENT CONTROL MEASURES: PROJECT DESCRIPTION. PRE -CONSTRUCTION CONFERENCE, ONE WEEK TTHE COMMENCEMENT OF LAND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN DISTURBING ACTIVITY, AND ONE WEEK PRIOR TOO THE FINAL INSPECTION. THE PURPOSE OF THIS LAND DISTURBANCE AC77WTY !S TO CONSTRUCT THE RESIDENTIAL HOMES AND THEIR CORRESPONDING ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND INFRASTRUCTURE FOR PHASE ll OF THE PLEASANT GREEN DEVELOPMENT IN CROZET, VA. THIS PROJECT PROPOSES TO DISTURB 16.99 STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING: MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE ORGINIA EROSION AND SEDIMENT CONTROL MEASURES: oc. OF LAND, IN ADDIT70N TO THE 13. 15 cc. ORIGINALLY APPROVED W17H WPO201900003. THE PROJECT WILL BEGIN ITS EROSION AND SEDIMENT CONTROL HANDBOOK AND NRGINIA REGULATIONS AR CONSTRUCT/ON 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 AN7CIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE IN THE FALL/WINTER OF 2022. A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL 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 DATE /F 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. CONSTRUCTION OCCURS DURING THIS 77ME 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 EXISTING SITE COND1710NS- CAN BE CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC. MAINTAINED ON THE SITE AT ALL TIMES. THE AREA OF THE PROPOSED DEVELOPMENT CONSISTS OPEN FIELDS AND EXISTING WOODS WLIGHT UNDERBRUSH. THIS SITE 5. PRIOR TO COMMENCING LAND DISTURBING AC77077E5 IN AREAS OTHER THAN ACTIVITIES. STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH GENERALLY SLOPES FROM THE NORTH TO POWELLS CREEK LOCATED ALONG THE WESTERN PROPERTY RTY LINE. THE SITE IS GENERALLY 3.02 CONSTRUCTION ENTRANCE, INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED 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 AREAS), THE 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 PLAN TO THE OWNER FOR RENEW 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 S17F /S BORDERED ON THE EAST BY RAILROAD TRACKS AND EXISTING RESIDENTIAL DEVELOPMENT. POWELLS CREEKS EXISTS TO CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 6. AUTHORITY. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADD177ONAL EROSION PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE THE WEST. 7HE EXISTING PHASE /PLEASANT GREEN DEVELOPMENT EXISTS TO THE SOUTH AND EAST. SILT FENCE WITH WIRE BACKING, THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. DIVERSIONS, SEDIMENT TRAPS, SEDIMENT BASINS, INLET CONTROLS, AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT THE CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS CONSTRUCTION AC7VITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE P077=N77AL FOR CONTAMINATION OF THESE ADJACENT PROPERTIES AND WATERWAYS. CONSTRUCTION ROAD STABILIZATION: DETERMINED BY THE PLAN APPROVING AUTHORITY PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR OFFSI7E LAND DISTURBANCE. • THE THE TEMPORARY STABILIZATION OFF ACCESS ROADS SUBDIVISION ROADS PARKING 7 ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMESDI 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 01NER Sl7£ VEHICLE TRANSPORTATION ROUTES WITH STONE IMMEDIATELY BOUNDARY. AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION UN77L FINAL STABILIZATION /S ACHIEVED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE TRAFFIC DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING 8. DURING DEW,4TER/NG OPERATIONS, WATER MLL 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. EGETAT/ON IMMED/ATELY FOLLOWING GRADING OF THOSE AREAS. FAST GERMINATING V SEE SOIL DESCRIPT70NS ON THIS PAGE AND THE PHASE ! EROSION & SEDIMENT CONTROL PLAN FOR BOUNDARIES, SOIL TYPES AND STABILIZATION. USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY GENERAL SOIL DETAILS. CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. CRI FICAL AREAS: TRAFFIC. CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL POWELLS CREEK AND ITS IMMEDIATELY ADJACENT WETLANDS ARE LOCATED ON THE PROPERTY. THESE ARE LOCATED DOWNGRAD/ENT 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 EXISTING ADJACENT RESIDENTIAL LOTS T SILT FENCE. )0. L ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DES/WASTED BORROW AREA. THE RAILROAD TRACKS/PROPERTY AND THE EXIS77NG ONSITE STRUCTURES PROPOSED TO REMAIN WITH PHASE H DEVELOPMENT ARE A A SYNTHETIC FILTER FABRIC A TEMPORARY BARB/ER CONSISTING 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 CAUTION !N AND AROUND THESE CRITICAL AREAS TO AND STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO ACROSS R7 SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND 3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ENSURE SEDIMENT IS NOT DEPOSITED ON THEM. TREE PROTECTION FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS /N 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 5.1.2& 3,03 CONSTRUCTION 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 NTH SECTION 13-301 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 THE CODE OF ALBEMARLE. REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND PRE-CONS7RUCT7ON MEETING. AS INDICATED. THEY SHALL BE INSPECTED /MODDATELY AFTER EACH RAINFALL AND 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL- TYPE POWER EQUIPMENT 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL 8E FLAGGED AND THE TREE PROTECTION FENCING SHALL BE MAINTAINED /N ACCORDANCE WITH THE NRG/NIA EROSION & SEDIMENT CONTROL SHALL BE LIMITED 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 CONSTRUCT70N PROCESS WITHOUT THE APPROVAL FROM THE MAINTAINS LATERAL SUPPORT OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS J. SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. INSPECTOR ON THE PROJECT T. 3.07 STORM DRAIN INLET PROTECTION:- PHYSICAL DAMAGE 70 ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY 4. INSTALLATION OF THE PROPOSED CONSTRUCT/ON 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 PROTECT70N /S SHOWN ON CONTRACTOR SHALL APPLY CONSTRUCTION ROAD STABILIZATION AS NEEDED TO THE CONSTRUCTION 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 FACILITIES WHERE APPLICABLE AREA IS S77LL BEING STABILIZED. MEASURE, AS SHOWN. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCT70N VEHICLE ROUTES INTERSECT PAVED PR0APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE BEFORE BEFORERE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION 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 STABILIZATION 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 3.11 TEMPORARY RIGHT-OF-WAY DIVERSION: IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO J..12 DIVERSION- PER/METER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS. TRANSPOR77NG 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 CONSIST A 50/50 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH 3.13 SEDIMENT TRAP- TWO SEDIMENT TRAPS ARE PROPOSED. REMOVED IN THIS MANNER. DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF 5. THE IN177AL ESC CONSTRUCTION MEASURES, AS SHOWN ON THE PHASE l EROSION & SEDIMENT CONTROL PLAN, SHALL BE LENGTH WITHIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING THE EROSION POTENT/AL GERMAN MILLET. STRAW MULCH /S TO BE APPLIED AT 80LBS/f00SF. ALTERNA77VES 314 SEDIMENT BASIN- THREE SEDIMENT BASINS ARE PROPOSED. INSTALLED NEXT. THE CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE AND TREE PROTECTION: PER/METER BY DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY EARTHEN ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. J..18 OUTLET PROTECTION -OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF THE MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND DIVERSIONS ARE APPLICABLE WHERE THERE OLL BE LITTLE OR NO CONSTRUCTION 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND SEDIMENT BASIN. SEE THE ESC PLAN FOR THE DESIGN LOCATION. SHALL BE MADE FUNCTIONAL 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 PROTECTION HAVE BEEN INSTALLED, AND THE COUNTY ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC. INCORPORATED INTO THE TOP INCHES OF SOIL. FERTILIZER SHALL APPLIED AT INSPECTOR HAS APPROVED THESE MEASURES, LIGHT CLEAR AND LAND DISTURBANCE MAY BEGIN FOR THE REMAINING 1000LBS/ACRE AND CONSIST OFF A A 10-20-10 NUTRIENT MIX. PERMANENTT SEEDING 3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PERIMETER CONTROLS THE CONTRACTOR SHALL BEGIN WITH THE INSTALLATION OF THE SEDIMENT ]RAPS AND SEDIMENT BASINS 312 DIVERS/ON: SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95Z KENTUCKY 31 OR TALL PLAN. SHOWN ON THE PHASE ! ESC PLAN. FOLLOWING THE INSTALLATION OF THESE MEASURES, THE CONTRACTOR SHALL INSTALL THEIR A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPORTING EARTHEN RIDGE ON THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT FESCUE AND 0-57 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS 3.38 TREE PRESERVA77ON AND PROTECTION- TREE PROTECTION IS PROPOSED WITH THIS CONTRIBU7NG DIVERSIONS AND ANY REMAINING SILT FENCE. FOLLOWING THIS, THE CONTRACTOR SHALL INSTALL ANY REMAINING STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON -EROSIVE VELOCITIES. APPLIES TO BE APPLIED AT 8OLBS11OOSF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. EROSION CONTROL ITEMS AS SHOWN ON THE PHASE ! EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND WHERE RUNOFF FROM AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE 19. EROSION CONTROL INSPECTOR. MAINTENANCE: ALL 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 ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY EROSION, OR INTERFERE WI77-1 THE ESTABLISHMENT OF VEGETATION 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 507 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 l/ EROSION & SEDIMENT CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A A TEMPORARY POND/NG AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED MAINTENANCE. FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AND REPAIRED IMMEDIATELY. IN GENERAL, DURING CONSTRUCT70N 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 OPERATIONAL AT ALL TIMES THROUGHOUT CONSTRUCTION AND SHALL BE MAINTAINED THROUGHOUT THEIR LIFE CYCLES. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS WITHIN 30 DAYS OF FINAL S17E STABILIZATION WHEN MEASURES ARE NO LONGER RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC THIS WILL CONTINUE TO OCCUR IN EROSION & SEDIMENT CONTROL PHASE ll. 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 STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL MONTHS, AND IT MAY BE CONSTRUCTED E17HER INDEPENDENTLY OR IN CONJUN077ON 21. THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS c. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO WITH A TEMPORARY DIVERSION DIKE. NECESSARY /N THE FIELD AS S/TE CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT ACCORDANCE WITH THE VIRGINIA EROSION &SEDIMENT CONTROL HANDBOOK. DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT W/LL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION. b.L GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT PERMANENT STABILIZATON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. A T TEMPORARY SEDIMENT BASIN:EMPORARY BARRIER OR DAM NTH A CONTROLLED STORMWA7fR RELEASE A TEMPORARY/S WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT THE 10. ONCE THE SITE IS GRADED, ALL THE PHASE ll EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS SOIL DESCRIPTION GRAVEL WILL BE REMOVED AND CLEANED, OR /T WILL BE REPLACED. 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 N ESC PLAN, IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO 7B- BRADDOCK LOAM-2 TO 7Z SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE 17, THE CONTRACTOR SHALL BEGIN INSTALLATION OF THE UTILITIES, CURB AND GUTTER, WALLS, AND ROADS. INLET PR07ECT70N 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 DEPOS177ON REACHED HALF WAY TO THE SHALL BE INSTALLED ON ALL INLETS IMMEDIATELY FOLLOWING THEIR CONSTRUCTION. THE INLET PROTECTIONS SHALL BE DRAINAGE AREA 1S 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 INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A . WITH SEDIMENT SO THAT IT NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE PULLED AWAY AND TEMPORARY IMPOUNDMENT 8C3 ODE LOAM 7 1ME SLOPES ERODED. SOIL IS VERY DEEP WELL DRAINED d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE 7HAT A GOOD STAND /S CLEANED AND OR REPLACED. AND 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 S/TIE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE 3.16 OUTLET PROTECTION: 0-9'" 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 TIMING DETAILS ARE TO BE COORDINATED STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES 7- CR OW LOAM-0 TO 2 SLOPES. S02 IS WELL DRAINED WITH A VERY LOW L OR CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS TIME IS DIGS. BROOK WOOD WITH BETWEEN THE CONTRACTOR AND THE INSPECTOR FOR THE CONVERSION OF THE SEDIMENT BASINS TO PERMANENT SWIM PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT O-8" RUNOFF L DIGS MAY BE REACHED AT 434 978-4435. IN ADDIT70N THE OWNER MAY BE ( ) FACILITIES. NO ITEM SHALL BE REMOVED, THROUGHOUT ALL PHASES OF CONSTRUCTION, UNLESS 7HE 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 THE INSPECTOR GIVES PRIOR PERMISSION. MINIMIZE THE POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND 253- 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 THE VIRGINIA EROSION AND SEDIMENT ENERGY OF CONCEN7RATED 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 THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE NTH THE PIPES AND ENGINEERED CHANNEL SECTIONS VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. J.19 RIPRAP: 36D- THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". HAYESVILLE LOAM-15 TO 257 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. STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL STONE KITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80 PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF THE EROSIVE FORCES OF CONC". NCENTRATED RUNOFF, SLOW THE VELOCITY OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. CONCENTRATED RUNOFF WHILE ENHANCING THE P07ENTIAL 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.govloppIWebSoilSurveyaspx WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS GENERAL SLOPE (3a OR LESS) PER ACRE TOTAL MS 331 TEMPORARY SEEDING., KENTUCKY 31 FESCUE 128 LBS. THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY RED TOP GRASS 2 Les. SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION SEASONAL NURSE CROP 20 UPS. AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO 150 LBS FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEASONAL NURSE CROP SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-S17E AREAS, AND TO PROVIDE PROTEC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT FEBRUARY 16 THROUGH APRIL ANNUAL RYE VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE 332 PERMANENT STABILIZATION: NOVEMBER THROUGH FEBRUARY 15 WINTER RYE THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY NNOTE& PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS /N 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 MA7ERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION RECEIVE A PERMANENT VEGETA77VE COVER. OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35, 338 TREE PRESERVATION AND PROTECTION: PS PERMANENT SEEDING SCHEDULE PR07ECT70N OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND J N0 SCALE DISTURBING AND CONSTRUCTION ACTVTY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, (STD. & SPEC. 3.32 OF VIRGINIA EROSION & WATERSHED PRO7ECT7ON LANDSCAPE BEAU77FICA T70NDUST AND POLLUTION CONTROL NOISE REDUCTION, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND /S SEDIMENT CONTROL HANDBOOK, 3RD ED.) BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES /N 7REE-INHABITED n /� 7� r Source: Va. DSWC AREAS SUBJECT TO LAND DISTURBING ACTIVITIES Lrl ROSION l/ONTROL AmTLI S 339 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION AC77WTIES. 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 /N ACCORDANCE K17H THE VESCH. ES-6: THE CONTRACTOR /S RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES-7.. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-B.-DURING DEWATER/NG OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DENCE. ES-9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES ES-1: UNLESS OTHERWISE INDICATED,. ALL VEGETA77VE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MIN/MUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND V/RGIN/A REGULATI0NS VT 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES-2, THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES-J.-ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-5:PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIM17ED TO, OFF -SITE BORROW OR WA57E AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 1992 3.07 1992 CONSTRUCTION .• COURSE EXIS- PAVEV l � . c ll•` t I AJ /l\ \_6" MIN. 21A AGGREGATE BASE PROR STONE CONSTRUCTION ACCESS � MIN. -ASPHALT PAVED WASHRACK 1 2% 12' MIN.- : I_ DRAINAG E '. UST EXTEND FULL WIDTH A INGRESS AND EGRESS TO SEDIMENT F{RATION f TRAPPING DEVICE ELM FILTER 12' MIN. SECTION A -A rW EXISTING II PAVEMFNTJ 31TIVE DRAINAI I SEDIMENT UPPING DFV'IV A nninimtum water tap of 1 inch must be installed with a nuinirmum I inch baticock Ahutoff vah•e strppl mg a wash hose with a diameter of 1.5 inches for adecplate constant pressure. Wash water must be carried away from fie entrance to in approved settling area to remove sediment. All sediment shall be prevented finam entelitm storm drains, ditches or watercourses. PAVED WASH RACK GRAVEL CURB INLET SEDIMENT FILTER lz GRAY. FILTER' n• RUNOFF WATE MESX nUERuEREG WATER a JI_p SEDINRR IIII < o COV RUE GUTTER I3' .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 UNCON71-INCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. • GRAVEL SHALL BE WGT #3. #357. OR a COARSE AGGREGATE. Source: Va. DSWC Plate 3.07-2 Source: Va. DSWC Ill -36 M-41 1 SET POSTS ANO EXCAVATE A 4 X4" 2 STAPLE WIRE FENCING TO NO SCALE 3.07 1992 3.11 Plate 3.07-6 Sou ee: Vs. DSWC TRENCH UPSLOPE ALONG THE LINE THE POSTS. J. ATTACH THE FILTER FABRIC TO OF POSTS THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. III - 62 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. FLOW J _I 1- - EXTENSION OF FABRIC AND PIa,, 3_I1-1 No. 35791 11/6/20 V/ ZZ O O� U to WZ:) In J z O H in z w ~ W W Ce 0 LE W W z z IR Ul z J J U r ti M co N co r N O N N w J \J 0 _ U U) w U) Im- r� V O O N - U) J Q LU 0 06 w W O z LL z O z LU 0 LU U] z O U] O w b w a U) 182154 SCALE N/A SHEET NO. 14 6 z PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL - 4" EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE Solace: Va. DSWC SUPER SILT FENC EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE SSE. (WITH W/RE-BACK Os - IMMEDIATELY. NO SCALE woo son- _ / - — - _ s ' / / LIMITS OF DISTURBANCE APPROVED PORTION OF EXISTING EMERGENCY ACCESS ' _ _ _ _ - _ _ a¢ - - _ —74p - — — - _ _ _ - - - -- _ _ _ _ _ _ - - TH so PROPERTY LIMITS (TYP.) — WITH WPOzoiTO REMAIN DURING THIS PHASE SOILTYPE 900003 , — —„, 13 - - --PROPOSE LIMITS —PROPOSED OF DISTURBANCE (TYP,) — --''" — w r- 7 �7 w — CONTRACTOR SHALL INSTALL _ / , k'' \, w - - -- --- R DIVERSION ACROSS THE . - ---^ �___ - _ / ,3.. -- �,�� \� \ \ . \ �:\ �\ r i/ _ v V i ������� ����.�����, ago -,SCOTT R. LINS R CONSTRUCTION ENTRANCE. �'��V �_� I / �. � O q t r-,� u D4 IP `. __ I / t) No. 35791 h -- ® PHASE IDRAIN w - �'i \ 11 LOWi ®; M- \ / (,— %i /, `011/6/20 cU�' AGE SF / �- ✓ �/,� i/ _AREATO SEDIMENT - :''� TONAL;�wGO:W TRAPA-z.zoACRES �:_ � � -;..• � _ I` � � �'�'`� ,,,// j ��yi //// I /' / s i� PROPOSED ROCK WEIR OUTFALL CONTRACTOR SHALLUSEAPO IONOFTHEEXISTINGEMERGENCY TO EXISTING DRAINAGE INLET ACCESS ROAD FOR THE PAVED CONSTRUCTION CE V / CONTRACTOR SHALL INSTALL A WASH RACK AND ENSURE A- 1 / MINIMUM 22' o' PAVED AREA FOR THE CONSTRUCTION ENTRANCE. PROPOSED ROC _ ' - PROPOSED CONTRACTOR ` �� __--x� � STAGING AREA 7 -x WEIR AK IR • �� - 2z'x o' IN. WI _ CULVERT TO i �I j/ / // �,'- WAS 7RACK SF BE REMOVED �<��� � , i / i• 1 , PROPOSED CONCRETE, _A o - �. I r / ✓ / DRAINAGE DIVIDE (TYP.) LOCATIOWASHOUTAREAN OF - , ®► PORTA-POTTIES SOILTYPE \ �Q'J /' /' / Y PROPOSED 18' DIVERSION. J� > ® �,. / v z a LOCATION OF- ' ;4a- DD CONTRACTOR SHALL ENSURE y ." �, \\ ""/C. �,�\.,, \ \ -' ''�'�`"`�,, / •X / y.�{,1 'I` 1 O g i5 CY DUMPSTER POSITIVE SLOPE IS MAINTAINED. h / \ S6A On_ - w r 1 ' . ` V m i /t �BERM SHALL BE STABILIZED AS' ;' \ ®� "� - - ,r' , ; - LIMITS OF DISTURBANCE APPROVED � A FIRST STEP IN DISTURBANCE. / 'J ,'Q ` L ~ o � t �WITHWPOzoi o000 \ `. �(��\�k�-- ----------- - Hsi a UCTION TRAFFIC SHALL n 9 3 T r o M z RSITE ACCESS n LOCATION OF - S� �F \'------_ ,' \ �..� o fUELINGAREA - J/ j� -. \ AFT T\-_ - -✓ \ �\ > w .. �A j THE FUELING TAk SHALLtE COMPLETELY SURROUNDED BY V '\, " /,' -a _ �,.�- �� • BE REMOVED � + " Az' DEEP, 2' WIDE EARTHEN BERM WITH A HEAVY MIL " � t / "\® - _ BE REMOVED ,- ! 'ui POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS----- _ __ / '•'� ® M - - - - `� �'"°� �' - OPEN -TOP DUMPSTER WITH A SIDE DOOR.THEPROPOSED _ ,) �✓'- -- - -- - - M ce BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS _. io% LARGER THAN THE MAXIMUM VOLUME OFSTORED FUEL. -% W _ TO BE REMOVED �_ EXISTING CUL-DE-SAC % - W _ - / / W �•" ".- __ .._ -'�''- �:11 -- - ''/ �APR CONTRACTOR 28 DIVERSION. SANITARY SEWER + i TO BE REMOVED �� 1CONTRACTOR SHALL ENSURE . - �_�:-`� - - '. -� --- --gat_ / � / / POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABILIZED AS I P -W , , - _- - - ' ^ A FIRST STEP IN DISTURBANCE. D b a / ; o IP Lu � --' -� _-- - O : _= LOTPROPOSED STOCKPILE AREA T -BE U 1 SOILTYPE IP NA 25B � ENCOMPASSED BY SILT FENCEOATALL TIMES '� ,. � � / � � pRIVATESTREET 14 <- — -�. - �- \ �, - LOT PHASE I DRAINAGE SOILTYPE / r SF - - - - - - _ % '- - - -- - - LOT "` / L9 AREA TO SEDIMENT 7B ' f / ` BASIN C=io.83ACRES _ afr- ✓ / , i \ - -� I I' oT � ' - - - - - - -- ' / / / r '� _ I I v I ( L 5 ru / LOT ~ PHASE I DRAINAGE , / /� ''�� I i� 17 C7 AREATOSEDIMENT / , -/ OT - m z6� _ - =� ' PROPOSED SAFETY FENCE - ' ! I i / t � - / / ' -' / � INSTALL SIGNS "WARNING _ EXISTING TREELINE TYP. 4 t \ � ( ) BASIND=6.i ACRES,yI,�I � - QUICKSAND,KEEPOUT" SAF- - --� LOT / "� M �- .f -Fr-- `i � r•� \\----\// / // / ��, /� / / /' // � ' :/SF.._;/ �'• j % 27 �PROPOSEDz�"DIVERSION '/ ,/ - —_ ' CONTRACTOR SHALL ENSURE TP - t32- - - - ` / / / ' ' / / /a !� ! I N Z / /�" i i �/ Lo$ OI 6TDYPE \ LOT W � __ _ -�- -- POSITIVE SLOPE IS MAINTAINED. SOIL TYPE _ _ SOILS LINE (TYP.) - > / S 3 r ' r BERM SHALL BE STABILIZED AS 8C SF ti - LIMITS OF DISTURBANCE APPROVED ' ' / �/ / �� /; / �9 N IZ - _ �A FIRST STEP IN DISTURBANCE. 3 ,_( � - _ / , / F, .. � _ ----- _ WITH WPOzoig00003 / / / / / Qi �' DD - - (/ + , / _ if EXISTING PLEASANT GREEN �zo W J _--- PROPOSED -- / '� - //, ��� "b PHASE I DEVELOPMENT �` < Q I -- - -- -- - - - " - `T -, / .. •JQQJQ7 i � ". � ; ; L09 ./ " - t LOT j , -- �" ' I NAw- -' i �'� �� /'/ j'i�'� �:_ zi �' �JJ •��_ ,® ,��,'/ 3° / /.//✓� �' LOT - _ - / LOT22 / -oo / / PROPOSEDi8"DIVERSION. �` / - _ - /// / / �� I�. 32. ' //,/ lOT a ����% .:�� W �/ IP 9 z / / POSITIVECONTRACTOR S OPEIALL ENSUREISMAINTAINED- i - ' /i /,. --- �l��j J LOT \ / // /i zy , \. y. .j� ' Z Lu DD BERM SHALL BE STABILIZED AS . - / - ,•, ��J" � .r" Q FIRST STEP IN DISTURBANCE. g4,' - / /n / /' / ' '� ` t U_ �� �`.. �� �/ 5C(S•(R�� ./� • ,, SF wOTDCLA5 ARIPRAP LINED- PROPOSE q OUTLET PROTECTIONWITH FILTER FABRIC SOILTYPE -uj UNDERLAYMENT (L=8', Wz-9, D=28) W2=B, TP 36D � i I - XISTING ioo`WPO BUFFER (TYP.)LLI PROP SED SAFETY FENCE,,v.. ,/ TP - - / ------ -- - -- - INSTALL SIGNS WARNING \ W. —� ��W •✓ _ — $F SF - _ EXISTINGffflffff �� ® QUICK SAND KEEP OUT' OI �� E / / U) U0 ul 0 - -- — Lo Z LU -- FLAT VDOTCL. Al RIPRAP LINED - EXISTING 1o0 YEAR FLOODPLAIN (TYP.) � , ✓� 4 LLI — OUTLEI PROTECTION WITH FILTER FABRIC / FLOW DIRECTION ARROW (TYP.) \ - Lu SEES WM PLAN FOR, - s _ " i UNDERLAYMENT(L-zS',Wi=y.S' Wz=u D=iB') - _ OUTFACE DETAILS.. ' � � �� — --- -- - � "�� t \ -_ 49 PROPOSED LIMITS OF DISTURBANCE (TYP.) �� t SEE SWM PLAN FOR LEVEL - _ - ` LOT U) W (n LU TURBANCE (TYP-) SPREADER DETAILS /� - - \ \ j 50 � J Q /SOIL TYPE - --- ---- - - I - - --- _ - --- - EXISTING zoo-YR FLOODPLAIN PER _-- �� \ I - • - -- _ J EE CLEARING (TYP. P , �� / ''\ -- - - - - - _ _ _ __ HEC-RAS ANALYSIS PERFORMED = .,\ `. \ \ t� I j LLI APRIL COLLINS ENGINEERING IN ` - \ I / ' PROPERTY LIMITS TYP. - zmg, SEE WPO 201900027) \ D SOIL YP = / 1 IL - w OP EXISTING STREAM (TYP.) y - " xr . 1� �' / Q 7 / A / `` b P OPO5 DVDO� STb. LASSAIRIPR P`LINED• / ABRI OUTLET PROPOSED LIMITS OFTREE CLEARING (TYP .) t g ((UNDERLAPROTECTION MEI NTL WI TH Wz 3' FWz=g'D=18 )y �wi� O --_ --- ELLS CREEK - - \ n' ?F -- '_ N RAPHI SCA _ ft C(li 0 -694 u o f'' / '-- i/-- - ®--- - —� — - SEE SWIM PLAN FOR x -- _ TYPE ®_, \ IN TEET- \ OUTFACE DETAILS 1� JOB No. - -- - - _ PROPOSED ioo-Y FLOODPLAIN 1 ineTi =-40 _ ft \ \ \ \ PROPOSE FLAT VDOT CL. AlAI RIPRAP LINED / \ _ -- \ -- ----- _ -- - " `-�--- � : ' -- \ � \ OUTLET PROTECTION WITH FILTER FABRIC P PER HEC RAS ANALYSIS � x`` _ _ — — — — — _ - --- - --- - - ` ` \ \ O _ PERFORMED BY COLLINS \ _ 182154 /^' — _ _- __e = �- _ - UN A =9, 1= r = =1 ) RILz g, SEE � �A/ + SCALE _ NT (L 6', D ENGINEERING I ,\� 1 �. WPONoig000z�NA �0\..�\ \ 1�r=40' ftft r�L DERL Y�EE SWM PLAN OR VEL O �: S' �� i �' `;, SHEET NO.. �' SPREADER DETAILS �Co}OO c�OOd Q-o 15 �. SOIL TYPE 7113 TH OFF ------ �5�AN RPALROAD—w �v �SCOTT R. LINS \\ G aft u No. 35791 ,h ' • 0 11/6/20 - ♦ ♦ 1� 00 to \ IONAL 00 -' 1 / � - ♦ 400 / to 00 to aft ift 00\ to to go 100 1 i `NOTE: NO CONSTRUCTION TRAFFIC SHALL USE CLING LANE FOR SITE ACCESS / to \ s 0 a k / - LU J A I^ ' \ �1 \ / I Lu III ce LU 1 1, 00/ - I / /� , p I � , ' � ♦ / i / 00 / PHASE I DRAINAGE \ / / // AREA TO SEDIMENT F- o �� ' / v / s _ - BASIN C=io.83 ACRES o 010 00 fAG P�ER0� _ SOIL TYPE �� - PROPOSED SAFETY FENCE, ' m INSTALL SIGNS WARNING / / - - - - - rc CS QUI CK SAND, KEEP OUT 91 \\ / RAINAGEVIDE (TYP.) s I i -7do wy �! ' LOW DIRECTION ARROW (TYP,) / �i % _ PR Ch EXISTING MANAGED fi A V / / / STEEP SLOPES (TYP.) �EP � � PROPOSED 18'DIVERSION. r CV Z �1 ' --- y - CONTRACTOR SHALL ENSURE ' PROPOSED 18" DIVERSION. I r SB 0 Q POSITIVE SLOPE IS MAINTAINED.. p CONTRACTOR SHALL ENSURE _ C N J z BERM SHALL BE STABILIZED AS POSITIVE SLOPE IS MAINTAINED. - N Q PROPOSED LIMITS OF DISTURBANCE (TYP.) S PROPOSED -iW DIVERSION. A FIRST STEP IN DISTURBANCE...' � BERM SHALL BE STABILIZED AS'Iwo �� � `, , /' \ CONTRACTOR SHALL ENSURE A FIRST STEP IN DISTURBANCE. Q J _ goo / POSITIVE A M S STEOPE IS MAINTAINED.P N DISTURBANCE. S / / ® \ _ O BERM SHALL BE STABILIZED AS pp -- -- - i - - - - - Lu \ SOILTYPE a"/�+_ <DID- _ z B � PHASE IV DRAINAGE i � _" ,= = / \ AREATOSEDIMENT dJ I / \ BASIN B = 435 ACRES s \� EXISTING TREELINE (TYP.)0*00 W L 1Lu i 000 000 G o i i PHASE I DRAINAGE >d _ — � — - - ' / � - � U (n SF �J.J AREA TO SEDIMENT _ ' y LL PROPERTY LIMITS (TYP.) TRAP = 2.93 ACRES - - _ _ auk - -loop 7 / jV \ S / .i i _- 1 r - -'PROPOSED LIMITS OF DISTURBANC ROPOSED SAFETY FENCE, �30 p E(TYPJ � -INSTALL SIGNS "WARNING i i i ,' ---, QUICK SAND, KEEP OUT SA 4 / ~ F ' / � ' , // — — - - - - - - - -' , - .; i _ - TP .PROPOSED LIMITS OF TREE CLEARING (TYP.) � z ZB LL, Lu EXISTING PRESERVED PROPOSED SAFETY FENCE, Lu I SIF z STEEP SLOPES (TYP.) INSTALL SIGNS "WARNING SA F ,..:010 QUICK SAND, KEEP OUT" _ / SOILTYPE �,. ' '� � � , + - � � i` EXISTING aao WPO BUFFER ( ) W 8C R TYP. _ 3 - - -- ® i- fill � J Q r O ♦ _ _ _ - _ PROPOSED 18" DIVERSION. i - _ CONTRACTOR SHALL ENSURE / _ - ® — ��i A � 1 W P SED BAFFLES 0 -'� - - - / \ P P SITIVE SLOPE IS MAINTAINED 1 BERM SHALL BE STABILIZED AS A FIRST STEP IN DISTURBANCE. PROPOSED LIMITS OF DISTURBANCE (TYP.) ' J DID _ _ -- / - ' � � � - � % _��� PROPOSED ROCK WEIR OUTFACE i ic B S OF TREE CLEARING (TYP.) a � 0 O W �— -� ROPOSED LIMIT PRAP LINED XISTING ioo-YEAR FLOODPLAIN (TYP.) GRAPHIC SCALE CV - 756-- -- S OP U DERL _ _ ER (TYP.) _ OUTLET PROTECTION WITH FILTER FABRIC ED VDOT STD. CLASS AI RI r - AYMENT (L=8', Wr3', Wz-B', D=a8") no 0 20 40 so w EXISTING aoo O BUFF � O rr TP OW woo wow 155 - LEVEL 752:-- _ - _ SEE SWM PLAN FOR L EXISTING STREAM - - - - - „ / SEE SWM PLAN FOR _ SPREADER DETAILS 1 T "4 - / o� _ S "I: D -- F d OUTFALL DETAILS SF i c i EXISTING ioo-YEAR FLOODPLAIN (TYP.) , _ - v / _ - ® ® SOILS LINE (TYP.) �06 NO. a- 18215 PROPOSED LIMITS OF TREE CLEARING (TYP._ ROPOSED LIMITS OF DISTURBANCE (TYP.) ' / _ - ' SOILTYPE _ �---- �- _ '/, _ SCALE 4 — - 0P - -- -- EXISTING aoo YR FLOODPLAIN PER _�- =/ I - -- - - �401 - - - - -- - 1"_40' '---� I /--- - HEC-RASANALYSISPERFORMED . �7 ,.�� --_ ��' - I PROPOSED FLAT VDOT CL. AI RI LINED � � OUTLET PROTECTION WITH FILTER FABRIC__ -. BY COLLINS ENGINEERING IN - _ - " i� SHEET NO.. UNDERLAYMENT(L=a Wa= Wz=B. D-a8") ---- -- -- APRILzoa9, SEE WPO zoa9000z7) _ _ _ T, - 4,5',_ 3, ' - --- - ---- 16 t - t _ i - — —REMAINDER OF EXISTING EMERGENCY ACCESS ROAD TO BE_- - oni' / RAINAGE / LIMITS OF DISTURBANCE APPROVED — AREA TOSEDIMENTREMOVED AND RELACED WITH PAVEMENT AT PROPOSED GRADE - _. - - T - - - - _ _ _ \I _ TH O PROPERTY LIMITS (TYP.) ' __-- WITH WP020igoo003 - TRAP A = 0.47 ACRES ---------- Iz- -PROPOSED LIMITS OF DISTURBANCE (TYP.) CONTRACTOR SHALL INSTALL E - RM7 DIVERSION ACROSS THE / - - -- .. ----- m— \\ \\ / 5SCOTT R. LINS CONSTRUCTION ENTRANCE. IF M / - / t) No. 35791 M --- T — _. , 0�0 11/6/20� S'SIONAL E PROPOSED ROCK WEIR OUTFALL� \' n TO EXISTING DRAINAGE INLET / CONTRACT R SHALL USE A PO ION OFTHE EXISTING EMERGENCY ' ACCESS ROAD FOR THE PAVED CONSTRUCTION ENTRANCE. CE CONTRACTOR SHALL INSTALL A WASH RACK AND ENSURE A- •,,, ; a.:.. - — — -- _- 1... 1, * ®� --- �'.. \��. �\\ Ii J•z. \� // / PROPOSED CONTRACTOR STAGING AREA �� _x / �' PHfNSF- z'X70' MIN. W/-- WAS RACK — �, - �. '! A ' / i / / • - - PROPOSED CONCRETE �� � � � �,, � 1 / / �/ / / • WASHOUT AREA •.' 4 �y LOCATION OF PORTA-POTTIES��°'�/ a - , - o / - — i b.• /'i� lil / PROPOSED 18' DIVERSION. DD CONTRACTOR SHALL ENSURE a LOCATION OF -- — sg— TAIN is CY DUMPSTER BEERMISHALLVC OBE STABILPE IS IZED AS �.,.., A LIMITS OF DISTURBANCE APPROVED' ) ` �` � �! �-__---- __�--_,','�� ® \/\ A FIRST STEP IN DISTURBANCE. ` \„ L e - Q ` V' o WITHWPOzoi o000 �! - - ------------ y'r ` a v ' UCTIONTRAFFIC SHALL d 9 3 / ,^.. ,.J._ e_ \, �y /SST PF ------ _ H r� �..� o R SITE ACCESS LOCATION OF _ T j FUELING AREA �a ' r `` r _ THE FUELING TANK SHALAE COMPLETELY SURROUNDED BY \' , i \ ' \M • ' -,t _ - ' - A zDEEP zWIDE EARTHEN BERM WITH A HEAVY MIL - \ ; i + - - \� ' - M. -- —fib/ ' 'POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS ILu a) TS. ( - OPEN TOP DUMPSTER WITH A SIDE DOOR. THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF i A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY ISLij ' 3.o95 LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL, S F _ 1 - 7- DC + + O W (/ DRAINAGE DIVIDE (TYP.) - - PROP SED18' DIVERSION. CO RACTOR SHALL ENSURE TS POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABILIZED AS �- I A FIRST STEP IN DISTURBANCE. L1J i / Z D ' a f i— — IP o _,., - - - -- — 7� LOT < �a r P % , L . o t PROPOSED STOCKPILE AREA TO BE -- - PRN ATE T i / / �4 ti ENCOMPASSED BY SILT FENCE AT ALL TIMES, _ pRfVATESTREE ��/ Q— / J ✓ / - IP z� _ --� Los �- - TS - , � x - PHASE II DRAINAGE PHASE II DRAINAGE _- 7 SF AREA TO SEDIMENT I - '; 0 _ _ - ! L9 LOT ' AREA TO SEDI MENT - - SLOPES GREATER THAN 3a SHALL BE PLANTED WITH NATIVE STEEP SLOPE-- _ r � I BASIN 6.o6ACRES - ���� -� - CTi MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF -- - - _ ' - r LOT BASIN C = 13.71 ACRES - , , 6o LBS. PER ACRE, OR i LB PER i,000 SF, UNLESS SPECIFIED OTHERWISE. - _ i LOT Z 1 J / M ;- --- ?' PHASE- ROPOSED SAFETY FENCE, INSTALL SIGNS "WARNING / ' � � - - � i � � ' • -- � s'- QUICK SAND, KEEP OUT" _ LOT ! - f LOT C"7 T / -- -- - - PROPOSED 18"DIVERSION. ` , )--• S F , I / / '' Z - CONTRACTOR SHALL ENSURE _ ? / `/ .._ 7-32 -- - _ :. "�- LOT7 1 / LOT O Q POSITIVE SLOPE IS MAINTAINED. \-.� TP .. - , , - ' � ` ; z8 / / / / / �9 W O� J -a BERM SHALL BE STABILIZED AS SF _ LIMITS OF DISTURBANCE APPROVED _ l�� - , _ / / N - ! A FIRST STEP IN DISTURBANCE. �,•\ i � WITH WPOzoi 0000 DD - - _ _ — EXISTING PLEASANT GREEN . 2O / " �`�� PHENT Q J _ -PROPOSED BAFFLES -_- - -i- - \ - - - - - -- - -Q��O ASE I DEVELOPM/ LOT zg / T C LOT �^ z �..'•� zz V l --' - U LOT \,.Y\\\\ L i PROPOSEDVDOTSTD. CLASSAI RIPRAP LINED ROPOSEDiB DIVERSION. / '� /., '�' 31 ' it .� i LOT 23 '`� LLI > r OUTLET PROTECTION WITH FILTER FABRIC CONTRACTOR SHALL ENSURE UNDERLAYMENT (L=8', W1=3', Wz=g', D=18") -_ _ _ , ' z i i i ;� , L9 POSITIVE SLOPE IS MAINTAINED. «_, F _ .. LOT �' _ ` q BERM SHALL BE STABILIZED AS - -- -- , ' - � ST STEP IN DISTURBANCEIP SF — - _ z I - -� � � �, sy � zoo � OZS �- XISTING ioo WPO BUFFER (TYP.)Lu`�J z f PROP 'SED SAFETY FENCE\ la....... \ �: / -TP / /----- _/ � -. - ---- --- - INSTALL SIGNS"WARNIN AF.. �� i� W` ��. � /. .•,\" � O ; - XISTING WETLANDS-' - QUICK SAND, KEEP OUT 7SF ...- ,�. a' / �` •' LOT z w FLAT VDOT CL. AlRIPRAP LINED - - 4 w L -- EXISTING ioo-YEAR FLOODPLAIN (TYP.) ( 1 ' ^ OUTLET PROTECTION WITH FILTER FABRIC / \ i FLOW DIRECTION ARROW (TYP. W d� 1 � i SEE SWM PLAN FOR' \ LOT UNDERLAYMENT(L=zS',W1=4.5' Wz=11',D=18") ( �y _ - '\�.� I-i _ OUTFACE DETAILS — — — S` OP as �- - - - - - PROPOSED LIMITS OF DISTURBANCE (TYP.) \ 49 - - , � , <. LOT U) W Lu SPREAD PLAN FOR LEVEL _ - _ `- TURBANCE(TYP.) SEE SPREADER DETAILS /'' - ---- - - \ --- - - , EXISTING ioo YR FLOODPLAIN PER _ _ �_ - - HEC-RAS ANALYSIS PERFORMED EECLEARING(TYP. T A _ --_ ---- A �'/ - --- -- _ _ - ---- `i BY COLLINS ENGINEERING IN `� / A A % / -- -- - - - - - zoig, SEE WPO zoig000z7) D OP f1. - PROPERTY LIMITS (TYP.) APRI / T / --- EXISTING STREAM _ L T ��� -- O PROPOS D VDO STD CLASS AIR[ P LINED Q ----- _ LET BRIC 0►�/ - - - -- PROPOSED LIMITS OF TREE CLEARING (TYPJ� (OUNTDER APROTECTION YMTENTIO 8 Wh3FIWz FILTER \ S CR O TP ' - -- — — — --- - -- - — --- - - GRAPHIC SA" �n _ \ I\ 00 - - '- • - - l - - - SEE 5WM PLAN FOR —� lQ �SOILTYPE FEET OUTFACE DETAILS z7 a JOB NO. 1nch_a© ft. PROPOSE TIIDioo-YRFLOODPLAIN PER HEC-AS ANALYSIS OUTLET PROTECTION WITH FILTER FABRIC 182154 wV=i OP.. PERFORMED BY COLLINS ��. (L-9, Wi-6, Wz-6', D-i8) ENGINEERING IN APRIL zoig, SEE �� �•�,:.. `. SCALE / /-` --•� — _ _ _ UNDERLA z - - Y�ENT WPO oig00027) �oOd� C,� 111-40� _ - - - - SEE SWM PLAN FOR LEVEL qOO © �O� SPREADER DETAILS �O o) �. 00 Y. i SHEET NO. ® °�o, �o/��I �� 17 - 1 v,TH OF o� \ I GRP R -- �� SOOTT R. LINS� i t..) No. 35791 ,ll�l ift -i �� 11/6/20 y� j � —00 aftSS1oNnL E \ go to 00 00 _ � � mft �f �v OP PVa ' 00 � � ♦, / Roy e� ,' stP i I / /- / A - NOTE: NO CONSTRUCTION TRAFFIC SHALL � �� \ /' USE CLING LANE FOR SITE ACCESS - -- 100 to / IV to _ � - TS � z O U CO -MLU_ J �� w z .. LLJ l — , \ , / PHASE 11 DRAINAGE AREATOSEDIMENT - W o BASIN C =13.7i ACRES a P E ♦ / / r S PSER C�Go 00to-j�s1a � Ala. \ \, s / ROPOSED SAFETY FENCE INSTALL SIGNS QUICKSAND, KEEPEEP OU , OUT" S 00.. CIO RAINAGE DIVIDE (TYP.) ( j �! / LOW DIRECTION ARROW (TYP.) // t' / / sac PR EXISTING MANAGED ' M STEEP SLOPES (TYP.) 40, ------ / / ---- J / �� � I SB Z (7) � PROPOSED LIMITS OF DISTURBANCE(TYP.) { .� / 1 / N � / TS J F 40� — SLOPES GREATER THAN ga SHALL BE PLANTED WITH NATIVE STEEP SLOPE / / �!. /' _ - - - -- � � � W � �— MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF / _ " \. -� - _ - _ --{ 6o LBS. PER ACRE OR LB PER SF, UNLESS SPECIFIED OTHERWISE. TS.. J O PHASE II DRAINAGE - i 1,000 AREA TO SEDIMENT -- dJ/ BASIN B=5.z4ACRES � i.l � i (� \\A / A i i u , e - L9 F— I Lu - s - D DID � �C/ / \ �� W " - / v PHASE II DRAINAGE i B oZS 1 - PROPERTY LIMITS (TYP.) - ' /' ,' r - - - -' - - _ - - - - - - AREA TO SEDIMENT - ' � DC TRAP B = 1.18 ACRES ®i - ,�� _ PROPOSED SAFETY FENCE, � PROPOSED LIMITS OF DISTURBANCE (TYP.) --- /�C / -- -- �-. _ INSTALL SIGNS WARNIN _ � _ i . __-------.-- ---_ __ � O QUICK SAND KEEP OUT" AF " - .. - _ TP ' PROPOSED LIMITS OF TREE CLEARING (TYP.) z 5T a H _ � W EXISTING PRESERVED *tROPOSEDSAFETYFENCE, �_�_��� B ' - W STEEP SLOPES (TYP_) INSTALL SIGNS "WARNING SAF� ' a - T� } f — / � SF /� i F� KEEP OUT' � DC / _ - ��—� I W • • QUICK SAND, K - EXISTING ioo' WPO BUFFER (TYP.) J (n Lu S ; P SED BAFFLES DID o� - - � � � _ cl� Q. V / ROPOSED LIMITS OF DISTURBANCE (TYP.) \ - \ > PROPOSED ROCK WEIR OUTFALL Q TS - C� B ROPOSED LIMITS OF TREE CLEARING (TYP.) - O PRAP LINED N ' �' PROTECTION WITH FILTER FABRIC XISTING ioo-YEAR FLOODPLAIN (TYP.), .- PROPOSED VDOT STD. CLASS Al RI GRAPHIC -. SCALE EXISTING ioo' WPO BUFFER TYR - OUTLET ( ) OP OUTLET - - - a56 - � �'r - � O - - - AYMENT (L-8', Wr3', Wz-9' D=i8") c._ no o so 40 so ,w TIP _ TP _ FOR LEVEL EXISTING STREAM( IN FEET SEE SWM PLAN i - - SEE SWM PLAN FOR SPREADER DETAILS / I --inch 40 OUTFACE DETAILSIn I �06 EXISTING ioo-YEAR FLOODPLAIN / _ c - - ,�� - 182154 PROPOSED LIMITS OF TREE CLEARING (TYP.) ROPOSED LIMITS OF DISTURBANCE (TYPO - - " / / ,' -- - - _ - - ' / _ - SCALE _ \ PROPOSED FLAT VDOT CL. AI RIPRAPOL P EXISTING ioo-YR FLOODPLAIN PER 1 4D --- - / / LINED - HEC-RAS ANALYSIS PERFORMED - /� - _ _ - = _ / / �' - .\•`N OUTLET PROTECTION WITH FILTER FABRIC - -. - BY COLLINS ENGINEERING IN '' - - - - - - - _ _ i SHEET NO.. --- v - V UNDERLAYMENT(L=i7',Wz=4g',Wz=8.3,P-a8") �� - APRILzoi9,SEEWPOzoi9000z7) - -___ - / _— SF' O �W_ __—w -' __--- - - - - - - i LIMITS OF DISTURBANCE APPROVED — / 4d WITHWPOzoig00003 AREATODEAINAGE - _ w — W - -7 _ _ - --_ __------ - pSTH 0 PHASE III DRAINAGE w �`. TRAP A = 0.2 ACRES DSEVIENT D LIMITS OF DISTURBANCE TYP,) M— • . \,\� � / � � S OTT R. LINS -- _ IP / �� / C� No. 95791 41 0 11/6/20� r. ✓ PROPOSED ROCK WEIR OUTFALL�\` - _ — TEXISTING O DRAINAGE INLET / T 'PROPOSED CONTRACTOR � STAGING AREA - 10�z IN. ) � ` � • �� i � I � � — o / WASH SF PROPOSED CONCRETE LOCATION OF WASHOUTAREA '-�� j /11 _ a - - r - s - ��, - ��, `U CO i CYDUMPSTER �� PS �� s6� 0�� �'�- �� r L 1�1 w D LIMITS OF DISTURBANCE APPROVED , _ _ _ _ - , UCTIONTRAFFIC SHALL 9 3 / �� Le��A'- -_------------ H/r ' z a \ �� •. / - _ �WITH WPOzoi o000 e, _•r, J.�J _J _ - _ / �� R SITE ACCESS LOCATION OF I `• - - - - - - - - = H o F- _.FUELING AREA �:, THE FUELING TANKSHALL BE COMPLETELY SURROUNDED BY/_ \-( A2'DEEP,z WIDE EARTHEN BERM WITH A HEAVY MIL 1,/"• ,� ) + �.'�'! �_ _ _ a i \\•.. W "POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS '_ �' - - _ -_ _ I \ MpA�/ �\ OPEN -TOP DUMPSTER WITH A SIDE DOOR. THE PROPOSED ) �✓' - -- , �, r 4. BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS '••' - \ / I io% LARGER THAN THE MAXIMUM VOLUME OFSTORED FUEL. ✓ SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE STEEP SLOPE ' • - , _� - ////� I N -� -' - - -� _ - MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS ATA RATE OF / / SF A A 6o LBS. PER ACRE, OR s LB PER s,000 SF, UNLESS SPECIFIED OTHERWISE.- \ / r 74o_ � Yy asp a IP P IP LLJ IP / j SF w o - -- — — , I ' S _ PROPOSED STOCKPILE AREA TO BE PSIP " ENCOMPASSED BY SILT FENCE AT ALL TIMES ) IP / PHASE III DRAINAGE- � AREA TO SEDIMENT PHASE III DRAINAGE ' Ip �.., BASIN D=4.51ACRES /, .✓/ V r - �; • 1 I - � 1 AREA TO SEDIMENT % \� I � `,: Los BASIN = zz.z6 ACRES - --- - - -, • I ;i / / d / LOT M 17 IP - IP - Ip - 26 / INSTALL SIGNS"WARNING LOT LOT 0 � _ _-'--.. IP ---' - �J I �`/ h ./ i' / d l I 27 - ., ...:•.. .. 1_ ''' •_-'r... _.-_._ r //... /. j / / /...r s'i� "(_ LOT � / / / / � LOT ,- O / IP ,�_�. •°- -.. - --•. .-I_ i - -.. � .. _ .-e. �° --I -- - , I ---' I I T / I J ,� - ; ' I I -- I ,,, II Y _ l I -��_ .•` / _ ;•<i /, L 9 LIMITS OF DISTURBANCE APPROVED rf. V a WITHWPOzoi o0003J i v ! EXISTING PLEASANT GREEN o PHASEIDEVELOPMENT 1 ' . ... Q � � T, I I I I I I \ 1 l ( / �. '-,c :. '. •, ,,. / ,., :'�• ' QQJ � % � zg. a '� - � / � � LOT EDVDOTDCLASS AlAI RIPRAP LINED UTLET PROTECTION WITH FILTER FABRIC � NDERLAYMENT(. ,=6', W2=12',D=18") / I / ,�O — �OU v:' I -___-7 _ L: I I y _ _ I I - I I I I I I I - I I_' --J I I - ,.4 � /. 7 ► t � �`^ � LOT - l � i gh (n 4J 1 ....I.'.' I I I I �I-l. ' - - --- I -_._ / / _ ROPOSEDi8 DIVERSION. / .. ,\ \ ,' �. • «.®, I(•.;. 3i. � / L�3 �j P Z I CONTRACTOR SHALL ENSURE LLJ MAINTAINED.' ERMSHALLBESTABILIZEDAS � - 'J„ � '•� s• / � �' � i t z / �; - _--•. � ' I------ I--- 1--J.,-_.. �----- �_ �� - /. - ' O AFIRSTST PINDISTUR -- - - UTLET PROTECTION WITH FILTER FABRIC --- - - -UNDERLAYMENT (L-8' Wr ' Wz- D-z8") Y XISTING ioo' WPO BUFFER TYP. Lu TP-- - 7 / a / 1, (n P , � EXISTING WETLANDS sol�V�O�E ul U) Z 0 -- - i< '� t� \ OP /' LO w Q FLAT VDOTCL. AI RIPRAPLINED EXISTING 1o0 YEAR FLOODPLAIN (TYP.) (, ,./S / -. s. S PROPOSED VDOT STD. CLASS AI RIPRAP SINE `' w (,n w OUTLET PROTECTION WITH FILTER FABRIC i ` - \ OUTLET PROTECTION WITH FILTER FABRIC \, / LOT �--4 - f FLOW DIRECTION ARROW (TYP.) - \ SEE SWIM PLAN FOR, , UNDERLAYMENT(L=zS', Wi=4.5', Wz=u D=iB") / •� - " DERLAYM 7 �' �' � �� / a � UN ENT(L=zS, W1=9, Wz=sz, D=18) 49 I --I OUTFALL DETAILS v�� �� � ," \-- PROPOSED LIMITS OF DISTURBANCE (TYP.) � � / � : ,. %;. � -_-\ � � SPREAD PLAN FOR LEVEL - / LOT (n uj W TURBANCE (TYP.) ER DETAILS j N i SEE SWL - - - - - 'il ----- - -- --- EXISTING oo-YR FLOODPLAIN PER _ _ � ey�Oa -_ EE CLEARING (TYP. ' P , �� / '� / � � -- - - - ,� � `- _ - _ __ � HEC-RAS ANALYSIS PERFORMED -' \ ,. � �, • �e �..,., �� • � II � �\ j W �� X� BY COLLINS ENGINEERING IN ,,, B / \ �� APRIL zoig, SEE WPO 202900027) '� I � \ / PROPERTY LIMITS TYP. `, r / Q r� D \SOP , �- EXISTING STREAM ( ) v x / PROP05 D VDOT STD. LASS Al RIPR P LINED OUTLET PROTECTION WITH FILTER FABRIC / rJ (UNDERLAYMENTL=8', Wi=3'Wz gD i8) PR LIMITS OF CLEARING (TYP.) O _REEK cNI o - - - , ----- ----- -_ IC A h\ GRAPHIC SC � � \ TP s \ \ n p ' \ ssa _ � a SEE SWIM PLAN FOR ® �^ , 'A� \ \ TYPE 20 40 -- - 80 180 ' SF - - - - _ �\ OI JOB NO. �, •` ' / _ _ _ - - - ' - -- --- --- _ __ -- -- - �.... 1 in.eTi = 40 _ ft. �. _ PROPOSED io FLOODPLAIN S V •,' / _-------- ---- �'"\--------------- --- __-_._- ------ -- �. \� POULETPRO ECCTIONWTHIFI TERFAB FABRIC PER HEC-RAS ANALYSIS �...�..\ / �� i _ 8215 UNDERLAYM - ' - - � � 5 � ' ENGINEERING N APRIL zoig, SEE � � �' �� � SCALE 4 ---- t -- — - - - , — z ) ENT( s 1 =, z SEE SWM PLAN F WP 9 z7 �b�� 1�r 40� - OR LEVEL OO OO O of o00 @ Cl o, 'I'I O 0I / ,zil ,.., \ SHEET NO.. SPREADER DETAILS , 19 ° \,TH 0 L - ' 4 01 _ G7 (\NGRAALROAO mow- _ �'SCOTT R. LINS� u No. 35791 Mrs not am am 11/6/20 IP to oft I solo,- ! - T � v Nito to -� � - O ss 100 to1 to 110 " - / NOTE: NO CONSTRUCTION TRAFFIC SHALL USE CLING LANE FOR SITE ACCESS O ♦ to v' i - ♦ �CIPM �z 0 < ' /� > s ♦ / - S - ah� U m ui z a Lu o F- i - - I / �� !-i i > z " 1 ALu 1 1 i ! s ' / , to Lu ir 00 ! x , \ \ / \ / i' / I� PHASE III DRAINAGE w ♦ i /�;' S _ AREA TO SEDIMENT a E / �� ♦ �' <v _ / �' BASIN C =12.26 ACRES ti - ' _ '♦ '' ' ��{ . - _ \IP_ L9 SA _c IP - DUCK SAND KEEP OUT INSTALL SIGNS "WARNIN %\ ! CI RAINAGE DIVIDE (TYP.) j 3 f \ , \ / ♦ \ LOW DIRECTION ARROW (TYP.) I ' EXISTING MANAGED ♦ ,/ /M/ R M a v M rµ h \ STEEP SLOPES (TYP.) / , I! ' \ \ PHASE III DRAINAGE \ , ♦� \ AREA TO SEDIMENT ! i - - N Q a --------- /l v v ' BASIN B =5.z5 ACRES ! -- A _j v i SB O \ C rn - - Q PROPOSED LIMITS OF DISTURBANCE (TYP.) ! - _ L9 M Lu - r Z IP ' T J " ; M y - ! V -' ' SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE STEEP SLOPE ��- / ! V A �� V A V - ��+� / J H-I y ' MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF ! \ 3 Q 6o CBS. PER ACRE, OR i LB PER i,000 SF, UNLESS SPECIFIED OTHERWISE. _ -M�/ � �' " ,->- \ \ \ "�. - - ,3rr ' -' SF i z Q Ill o z ! '� � \ ' ; �� �,.. _ : � ' ! � M/ \ \ .: \ \ !/ \ \ PHASE III DRAINAGE '... !✓ - � _ � g - - - : w 0-6 PROPERTY LIMITS (TYP.)Lu .PROPOSED AFETY FENCE - - \ E - _ ,.i r M/ .. !�\\ \_ - \ INSTALL SIGNS 'WARNIN - PROPOSED LIMITS OF DISTURBANCE(TYPJ D � n , / �/ QUICK SAND KEEP OUT..A _ ° M ` r TP PROPOSED LIMITS OF TREE CLEARING (TYP.) LU EXISTING PRESERVED PROPOSED SAFETY FENCE, \ \ _� ; � \\ - '�\ � ' - .•. • ._. \ \ � � -- \ \ \ _ \ \ � / W v , � w V _ r STEEP SLOPES (TYP_) INQUICK SAND, KEEP OUT' \ rr U) LU W J U) 0u Lu S _ P�SED BAFFLES �\ �V A V -!!0� — V -� w ROPO LIMITS'OF DISTURBAN ° / - -- Q ° PROPOSED ROCK WEIR OUTFACE >_ r V V ` \ ROPOSED LIMITS OFTREE CLEARING rY � S O G TYP.) � ° 04 -- �'' PROTECTION WITH FIL ER FABRIC LINED XISTING ioo-YEAR FLOODPLAIN (TYP.), PROPOSEDYDOTSTD.CLASSAIRI GRAPHIC SCALE EXISTING ioo' WPO BUFFER (TYP.) �� v _ OUTLET '_` ` se--------- r- �\ OP UNDERLAYMENT(L=8, Wi=3, Wz=9, D=iB") s_ no o so Ao so :w - - h TIP - 752:- SEE SWM PLAN FOR LEVEL ( IN FEET - - - - - / ' SEE SWM PLAN OR SPREADER DETAILS �� EXISTING STREAM 1 inch = 40 - i �, / ^p EXISTING ioo-YEAR FLOODPLAIN (TYP. - _ \ _ OUTFALL DETAILS SF �/ ' / a ( g 82154 _ , . // JOB I ' a PROPOSED LIMITS OF TREE CLEARING (TYP.) \ ROPOSED LIMITS OF DISTURBANCE(TYP.)' - _ P - \-- ----- — GALE ° - l - -- - •` S _. OUTLETED FLAT VDOT CL. PROTECTION WITH FlLTER FAIPRAP NEDI 1 4O a BRIO _ / - - - ' SHEET NO.. - - ! — UNDERLAYMENT L=i Wz= Wz=8. Z0 " �\ i ( 7, 43, 3, ) �; SEDIMENT BASIN'C' DETAIL _ - - i SEDIMENT BASIN'D' DETAIL SCALE: i"=2o' - ;� / SCALE: >"=20' A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE RISER's LOWER j 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.S5'). 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 W .0 919, 96. zd v69s w ` VV 746 j73 D ° ° ir PROPOSED SAFETY FENCE, INSTALL SIGNS "WARNING 726� N - ^) QUICK SA KEEP OUT PROPOSED WOODEN F LE \ 72 - �719- - TOP ELEV.=726.00 i � f z u J - - - - - -- - PROPOSED 20' WIDE VDOO� L.AI R AP LINED ` \ \ moo, „ \\ N o I II / 1z6 EMERGENCY SPILLWAY w/ 4:1 SIDE SLOPES & s \ ° 5 d J - FILTER FABRIC UNDERLAYMENT (STONE 6 W w y - - DEPTH=18"). SPILLWAY CREST ELEV.= 00.75'. ,o �re P O O�ED 10 DE TOP F AM. / �'j�� p ---' ce EXISTING 1o0 �YR FLOODPLAIN PER �o� �� AM ELEVATION=728.0 . % - - - - - _ HEC-RAS ANALYSIS PERFORMED BY o I 719 COLLINS ENGINEERING IN APRIL zo1 TOPOFD j \\ SEE WPO 201900027) 9, WPO REAM TO PREVENT FLOTATION, THE RISER BASE SHALL BE FIRMLY \ BUFFER, TYP. 724 so EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE \, ° • nI 726 12a o FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND_ INM STRC-102 PROPOSED1o'WIDETOP\9 ° ELEVATION=702.0A TO PREVENT FLOTATION THE RISER BASE SH I- BE FIRMLY PROPOSED VDOT STD. CLASS Al RIPRAP LINED EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE' / UOUTLET NDERLAYME T (LO-8, Wy WITHFILTER, DBR$C) X FOUNDATION THAT l58'x8' AND BURIED BELOW GROUND.�3., Q� \ o o S A VDOT STD. B-1 CONCRETE MANHOLE BASE WITH A 048' SHALL SERVE AS THE RISER s LOWER p T,' ' ° a a P'IfOPOSED 35' E VDOT CL. Al N T + -- ( ) RIPRAP LINED EMERGENCY SPILLWAY: / ¢7 ICY SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" \ n O w/ 4:1 SIDE SLOPES & FILTER FABRIC 17 770 li+ '� ��(1 STIR C-104 STANDPIPE WITH A RIM ELEVATION OF 699.75' SHALL COMPLETE THE STRUCTURE. RISER TO UNDERLAYMENT (STONE DEPTH=18"). -c. &"y00 INCLUDE A PERMANENT TRASHRACK & ATEMPORARY 05" DEWATERING ORIFICE (INVERT ELEVATION OF o~ SPILLWAY CREST ELEV.=7z6.5o'.. 31 C0F - 697.76'). ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF a w THE /R SHALL PLUG THE �Zo TEMPORARY ORARYnDEWATER DEWATERING ORIFICE CE WATERTIGHT. RT GHT. SEE SWM PLAN FOR ADDITPORARY FACILITY TO A PERMANENT SWM FACILITY, THE RONAOL PERMANENT SWM>02 N m� PROPOSED 86 LONG FLAT LEVEL SPREADER' OL & 6 'C'. LS �1�,, \ FACILITY DETAILS. ALL CONNECTIONS SHALL BE WATERTIGHT TYPICAL. Z `w TO HAVE A 1z" DEEP PLUNGE POOL & 6" WID RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP !w> a LINING AND A SLOPED 3' (MIN.) VDOT CL. Al RIPRAP OT LINED EMBANKMENT DOWNSTREAM FROM THE PROPERTY LINE TYP. PROPOSED FLAT VD CL. Al RIPRAP LINED 9g_� / PR POSED VDOT STD. CLASS Al RIPRAP LINED RIGID LIP EXTENDING TO THE EXISTING GRADE. _ - c - 2p < W. STREAM BUFFER, TYP. OUTLET PROTECTION WITH FILTER FABRIC 9 OUTLET PROTECTION WITH FILTER FABRIC (v' 1 �� } i w ��� UNDERLAYMENT (L=g', Wi=6', Wz=6', D=18') �� ♦ I ALL RIPRAPTO INCLUDE FILTER FABRIC DEEP. x _ ti a (UN RLAYMENT L=8' W2= ' Wz= , D 18") (O PROPOSED ioo-YR FLOOOPLAIN PER HEC-R � RLAYMENTS & BE A MI OF 18 ANALYSIS PERFORMED BY � � M \ � / kS NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES k AS / OFTHE BASIN OUTFALL SYSTEM AND LEVEL SPREADER. 9 9 00 COLLINS7L)INS ENGINEERING IN °, 'APRIL 201 , SEE WPO zo1 000z M ` I X 50.. �AT PROPOSED PROPOSED 64 'LONG FLEVEL SPREADER'D'. LS T AVE A 12" N NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES 0 C\I _ VDOT STD. EW-i - DEEP PLUNGE POOL & 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT , O OF THE BASIN OUTFALL SYSTEM AND LEVEL SPREADER, _ - W -- CL. Al RIPRAP LINING AND A SLOPED 3' (MIN.) VDOT CL. Al RIPRAP � � ` � � � ' I N � (n _ I _ ___PRAP TO `' ter; ., EXISTING too-YR FLOODPLAIN PER LINED EMBANKMENT DOWNSTREAM FROM THE RIGID LIP Q Q J - _ NOPOSED FLAT E OUTLET PROTOT CIL. ECTIONIWITHAP % EXTENDINGFILTER FTO THE ICU DISTING ERLAYM NTS & BE ALL MIN. OF 18" DEEP. \ C N ~ APRIL 2019, SEE WPO z019oo027. _ - FILTER FABRIC UNDERLAYMENT 0 Q� \ 1 1 `) a W Q J a HEC-RAS ANALYSIS PERFORMED BY COLLINS ENGINEERING IN (L=25, W1-4.5, W2-11.Sr D=18) 1 1 O® > W ��., Q ° _ - _ PROPOSED 5o'x86' CONSERVATION EASEMENT. AREA WITHIN � 0 \ �J O 1 W -FUTURE DEVELOPMENT DE THE LIMITS OF ISTURBANCES TURBANCES & SITE EASEMENT PREVENTS \ 64 1' 1 J J - ' EASEMENTTO REMAIN UNDISTURBED & TO BE LOCATED I J J J 1 ' I �- ire � > z _TH0F��� G7 SCOTT R. LINS q No. 35791 pow 11/6/204� W JONAL E��l Sediment Basiril Design MIN.I•WISPILLWAY f' WITHOUT CREMERGENCY ST OF E SPILLWAY drainage area (acres) 13.71 basin wlumes: (using 2' contour intervals) DESIGN HIGH WATER (2s-YR. STORM ELEv.) elevation (ft) contour area (sf) volume (cy) o s 719.00 5625.0 0 MIx. 1.0 - --- "--- - 720.00 6329.0 221.2 PoSER CREST 722.00 7824.0 744.4 • ORI 5TORnGE OEYYATERNC oEVIGE 724.00 9452.0 1383.4 wE SOo E 726.00 11212.0 2147.8 728.00 13078.0 3046.5 is r SEOIMEM CLEANOUT POINT (• WET • STORAGE REWCEO TO 34 C.Y./ ACRE) wet storage: wet storage required (cy) (67*DA) 918.6 design high water (ft) 726.50 dewatering orifice elevation (ft) 722.55 top of dam (ft) 728.00 wet storage provided at this elevation (cy) 918.6 top width of dam (ft) 10.0 available volume before cleanout (cy) (34*DA) 459.3 bottom of basin (ft) 719.00 cleanout elevation (ft) 720.91 approx. bottom dimensions: 47'x126' distance from cleanout to orifice (ft) (> V) 1.6 upstream face slope: 2:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67*DA) 918.6 baffles: YES principle spillway crest (ft) 725.50 length of flow, L (ft) 82 dry storage provided at this elevation (cy) 1037.1 effective width, We (ft) 131 diameter of dewatering orifice (in) 6.0 L f We (baffles not required if > 2) 0.6 diameter of flexible tubing (in) (orifice+2") 8.0 collars: YES runoff: depth of water at spillway crest l 6.50 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z1) 2:1 tc (min) 17 slope of barrel (Sb) 0.53 % 1 2yr 3.20 Q 2yr 19.74 length of barrel in saturated zone (Ls) 39.84 125yr 4.80 Q 25yr 29.61 number collars required 2 dimension of collars 4.0'x4.0' principle spillway: available head l 1.00 emergency spillway: YES diameter riser (in) 48 required capacity (Q25-Qp) (cfs) 9.87 spillway capacity, Qp (cfs) 29.61 bottom width (ft) 35 diameter trash rack (in) 72 slope of exist channel (ft/ft) 33 % barrel length (ft) 45.50 minimun length of exit channel (ft) 40 head on barrel through embankment (ft) 7.99 crest of spillway (ft) 726.50 diameter of barrel (in) 18 Sediment Basin'D' Design MIN. 1'wSPR1WAY 2- WITHOUT CRE5EP,GENIX 1 OF EM'�, ',,_ -- -_ / / O Ql drainage area (acres) 6.14 SPILLWAY J basin volumes: (using 2' contour intervals) (25-YR STORM ELEN.) i W z - e elevation (11) contour area (sf) volume (cy) DESIGN HIGH WATER - _ PObyELLS CREE f = U W 695.00 2960.0 0 o C) RISER CREST PROPOSED So x64' CONSERVATION EASEMENT. AREA ITHIN EASEMENTTO 696.00 3661.0 122.7 r DRYSTORAGE DEWATERING REMAIN UNDISTURBED & TO BE LOCATED OUTSIDE THE LIMITS OF DISTURBANCE. I-� 700.00 6881.0 897.6 oLvcE --- / i LU 'V Q 700.00 6861.0 897.3 • „E, • y-TOP„GE EASEMENT PREVENTS FUTURE DEVELOPMENT DISTURBANCES &SITE CLEARING � I 702.00 8672.0 1472.1 / I LLB SEDIMENT CLEANOUT POINT (• t0 - STOR GEREEDUCEO z 06 GRAPHIC SCALE W Q Z wet storage: wet storage required (cy) (67*DA) 411.4 design high water (ft) 700.75 20 0 10 20 40 so dewatering orifice elevation l 697.76 top of dam (ft) 702.00 wet storage provided at this elevation (cy) 411.4 top width of dam (ft) 10.0 available volume before cleanout (cy) (34*DA) 205.7 bottom of basin (ft) 695.00 ( IN FEET ) cleanout elevation (ft) 696.51 approx. bottom dimensions: 32'x160' 1 inch = 20 ft. distance from cleanout to orifice (ft) (> V) 1.3 upstream face slope: 2:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67*DA) 411.4 baffles: NO principle spillway crest (ft) 699.75 length of flow L (ft) 183 dry storage provided at this elevation (cy) 429.9 effective width, We (ft) 35 diameter of dewatering orifice (in) 5.0 L / We (baffles not required if > 2) 5.2 diameter of flexible tubing (in) (orifice+2") 7.0 collars: YES runoff depth of water at spillway crest (ft) 4.75 C (use 0.45 for bare earth) 0.45 slope of upstream face (2:1) 2:1 tc (min) 12 slope of barrel (Sb) 0.5 12yr 3.80 Q 2yr 10.50 length of barrel in saturated zone (Ls) 29.07 125yr 5.60 Q 25yr 15.47 number collars required 2 dimension of collars 3.5x3.5' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (in) 48 required capacity (Q25-Qp) (cfs) 4.97 spillway capacity, Op (cfs) 15.47 bottom width (ft) 20 diameter trash rack (in) 72 slope of exist channel (ft/ft) 6 % barrel length (ft) 48.66 minimun length of exit channel (ft) 16 head on barrel through embankment (ft) 4,75 crest of spillway (ft) 700.75 diameter of barrel (in) 24 DETAILS OF CORRUGATED METAL ANTI -SEEP COLLAR INSTALL COLLAR WITH CORRUGATIONS VERTICAL COLLAR TO BE OF SAME GAGE AS THE RIPE WITH WHICH IT IS USED DONT'll WELD 1/Y X T SLOTTED HOLES FOR 12• MIN, 3/6 DIAMETER SOUS. +_ �,* Nn U I , I + ° e . T 2* BANG 1 wElO BOTH SIDES SLOTTED HOLES CORRUGATED MEIAL CONTINUOUS WELD AT fr C.C. SECTION B - B SHEET 70 SHEErCENTE I or BA D BAN D 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 MTN TWO CONSTRUCTION AND CONSTRUCTION MATERIAL 1/2r DIAMETER RODS WITH STANDARD TANK SPECIFICATIONS. LUGS FOR CONNECTING COLLARS TO PIPE. Z W Q v) e Cn W O J LU JW W Jcl� Q 0 C) O N w 0 x a � JOB NO. 182154 SCALE 1"=20' SHEET NO. 21 Sediment Basin 'B' Design MW. Y WI SPILLWAY x'WITHOUT CREST OF EMERGENCY SPILLWAY drainage area (acres) 5.25 basin volumes: (using 2' contour intervals) DESIGN HIGH WATER (25-YR STORM ELEV., elevation (ft) contour area (sf) volume (cy) Ds 740.00 320.0 0 M N. , o - -- _- - 742.00 1188.0 52.5 PoSFR cREs 744.00 2573.0 188.5 ' DRY ' STORAGE DEWATERING OEMCE 746.00 4442.0 445.2 "WET"STORAGE 748.00 6755.0 856.9 750.00 9513.0 1456.5 SEDIMENT CLEANOLR POINT - (•WEI REDUCED TO C.Y�CE 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: 1Tx24' distance from cleanout to orifice (ft) (> V) 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 I We (baffles not required if> 2) 1.4 diameter of flexible tubing (n) (orifice+2") 7.0 collars: YES runoff depth of water at spillway crest (0) 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 5.0'x5.0' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (in) 48 required capacity (Q25-Qp) (cfs) 4.25 spillway capacity, Qp (cfs) 13.23 bottom width (ft) 20 diameter trash rack (in) 72 slope of exist channel (ft/ft) 25 % barrel length (1) 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' PROPERTY LINE, TYP. �r0'Li • ,ly� v 5 SEDIMENT TRAP'B' DETAIL SEDIMENTTRAP'A' DETAIL / SCALE: 1"=20' /��Q/ X TH SCALE: i -20I �44- - PROPOSED SAFETY FENCE, / / / / �D INSTALL SIGNS "WARNING ' / / / X PROPOSED R CK EX. Df TO = QUICK SAND KEEP OUT" } i / / WEIR OUTFALL 447. 3 SCOTT R. LINS d t) No. 35791 -- (WIDTH=i3.z') -- I'/, II IP oo� 11/6/20 y� �SSIONAL E��l �3 x POSED SAFETY FENCE, _ L� } INSTALL SIGNS "WARNING 75 QUICK SAND KEEP OUT" - 43 UE _ 750.51 : I 750 75 - a N 73 - - - - �(, SOS i' A60 �34._ PROPOSED 6' (Miff) WIDE TOP OF DAM. y ' TOP OF DAM ELEVATION=734.0'. " - - z.7 . " Z G� PO STREAM BUFFER, TYP. x 0 7 750.5-X �- X )�~//�� o (=iT \ -t! _ / ISTING ioo-YR FLOODPLAIN PER X X ' WIDE TOP OF DAM. l 0 I _PROPOSED ROCK M HEC-RAS ANALYSIS PERFORMED I PROPOSED 6r ! ~ (n z WEIR OUTFALL BY COLLINS ENGINEERING IN TOP OF DAM ELEVATION=750.50'. \ > > /i (WIDTH=17.6') - - - APRIL zoig, SEE WPO 201900027. -750 - �W/ I y LL Sediment Trap 'B' Design drainage area (acres) (<3) 2.93 ,• vARLAetE'• trap volumes: elevation (fit) area(sf) volume(cf) volume(cy) ORoOM CREST OF STONE WEIR WA A9E GROUND \\l1 728.00 1478.0 0 0.0 ELLY. D 730.00 2317.0 3,764 139.4 732.00 3317.0 9,368 347.0 DRY STORAGE - vWnreL[ 734.00 4460.0 17,117 634.0 WET STORAGE a• A L IXGVA ED) RIER CLOTH ORIGNAL CRgMD nEY wet storage: wet storage required (cy) (67*DA) 196.3E P E D'""' COARSE AGGREGA,E" c vs 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: 27'x83' crest of stone weir 733.0 top of dam elevation (it) 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' Sediment Trap 'A' Design drainage area (acres)(<3) 2.2 1.1 vARLvatF trap volumes: elevation (ft) area (sf) volume(cf) volume(cy) CREST OF STORE WEIR �•o r OOµsy 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 - y VARUffiE 750.50 3906.0 12,585 466.1 WETSTORAGE ' (IXGVA O FITER CLOTH aaclxu c EL lx ELEV. wet storage: wet storage required (cy) (67*DA) 147.4 -SEE P x 3.1J 1 cRWSE AGOREGATE� CIASS I RNRAP 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: 24x75' 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' GRAPHIC SCALE PROPOSED SAFETY FENCE, { 40 , - _ INSTALL SIGNS "WARNING _ = zo D o zo _- so so QUICK SAND, KEEP OUT" - / ( IN FEET) 58 i 1 inch 20 " ft., / I PROPOSED WOODEN BAFFLES - TOP ELEV.=747-83 - - - �' A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE PROPOSED VDOT STD. CLASS AI RISER'S LOWER SECTION, IN CONJUNCTION WITH THE PROPOSED REINFORCED RIPRAP LINED OUTLET PROTECTION ?rR CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 747.33' / WITH FILTER FABRIC UNDERLAYMENT SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE A PERMANENT TRASHRACK & A / (L=8', Wi 3', Wz=g', D=i8") PROPOSED TEMPORARY 05" DEWATERING ORIFICE (INVERT ELEVATION OF 745.z7'). ONCE THE SITE IS VDOT STD. EW-i STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF THE � \TEMPORARY FACILITY TO A PERMANENT SWIM FACILITY, THE CONTRACTOR SHALL PLUG - THE TEMPORARY DEWATERING ORIFICE WATERTIGHT. SEE SWM PLAN FOR ADDITIONAL j STR B-110 PERMANENT SWM FACILITY DETAILS, ALL CONNECTIONS SHALL BE WATERTIGHT, TYPICAL, VDOT MH-1 i STR B-104 i ` VDOT MH-1 /STR B-108 P - VDOT MH-1 / STR B-102 VDOT MH-1 _ s _ Q i r TR STR g% (18 N )"'_ B 107 (12" tj PE) �J15TR B-101 (18" HOPE) 1 " d x ors;. PROPOSED ' \ XVDOT STD. EW-i Now ti ;I�,a / WPO STREAM BUFFER, TYP. s /gyp �01 PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET / PROTECTION WITH FILTER FABRIC UNDERLAYMENT TO PREVENT FLOTATION THE RISER / PROPOSED 72LONG FLAT LEVEL SPREADER'S' 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 18" THICK REINFORCED io' WIDE TOP OF DAM / SLOPED 3` (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM / CONCRETE FOUNDATION THAT IS FROM THE RIGID LIP EXTENDING TO THE EXISTING GRADE. ALL RIPRAP TO l 7S 1 �.. � _ ELEV.=75o.00' � - 8'x8', AND BURIED BELOW GROUND. _ i INCLUDE FILTER FABRIC UNDERLAYMENTS & BE A MIN. OF i8" EP. y NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES OF THE BASIN OUTFALL SYSTEM AND LEVEL SPREADER.. - - _ EXISTING ioo-YR FLOODPLAIN PER i HEC-RAS ANALYSIS PERFORMED - PROPOSED 20'WIDE VDOT CL. Al RIPRAP LINE BY COLLINS ENGINEERING IN EMERGENCY SPILLWAY w/ 4:1 SIDE SLOPES & APRIL zoig, SEE WPO 201900027. PROPOSED 50'x72' CONSERVATION EASEMENT FILTER FABRIC UNDERLAYMENT (STONE TO . DEPTH=i8"). SPILLWAY CREST ELEV.=7483O BE 3'. - J AREA WITHIN E LOCATED OU REMAIN UNDISTURBED �� DISTURBANCE. EASEMENT PREVENTS FUTURE DEVELOPMENT, DISTURBANCES &SITE CLEARING. ELLS CREEDpoNN 0 Z� ti Cl? M N M W N z C%j Q J W IN LU Z W W J 0 W � � L9 F_ z I 0 0 z U Z = w z W U 0C 2: Y �r� � W `D W Ul z06 QLU z Zw�° fY (n W 0 J LU W LU C) O N 0 w a � JOB NO. 182154 SCALE 1"=20' SHEET NO. 22 I �" \ ❑ ram/ - i _ -�1/." \ AIc " ' ❑� ) r ) �' �\ \ �H 0 v ❑ 1 I ❑ ❑ \ _ - _ SCOTT R. LLINS�Z U No. 35791 1�1 11/6/20 / \ / \ \ �❑ - - - - - - \ �SSIONAL EMI � /// / // � / // �� �❑ - � Imo. � A ❑ ❑\� // � //'� � ��--,__ — — — — — � 1 \ � 1 / l \�❑ - / ! \ / -��j-- a-- -0 V 0 A ❑❑� — / - - - �❑ - - - - - - - ❑❑❑ ❑❑❑❑ t -- I \ � � -- �- ', ❑ t - / �_ - -- ,,- - I - .I. Ifs �.. __ =� �`�'�/'� 7 �-� W- - - �W �-�' � ❑❑`❑ _- �_' ❑ :. - -- ---__ o 100/ m ❑ , two an we-� -�V A �� /� O , i ❑�� a // —— y ❑' c \ > / i LU ♦ �� �/� / / ,r//i� ❑t /' T Ice ❑❑ � �i-T.TAL Tc= V % •` / � 100' OF ULT w/ d ELEV=5' (Tc-O A ❑ ,' _ \ -� / ' i, - ` TOTAL T�= D.zz nrs. 1❑ OF CONC. FL W w�ELEV-5'c 0\ 1 '�\025 OF CHNL FLOW'@ 5�-f't s\(Tc- 0 6 = i� _ - _ ,7D0' OF OLF w/ d ELEV-4' +.- -- ./ \�\\I ❑ o ❑ _ / , J 7�❑� (Tc NC. hrs) � / 400 OF CONC. FLOW uv/ d \ / / r,, ❑ Q E4EV=32' (Tc=0.02 hrs)- - -- --- A _ / ❑/ : / -- � '\: � � � 4114 / 1 y — J �\ _ �'✓->. - - �� - . �1A / O \ > ❑� - / / / / SUBAREA D / \ / � \❑ � � / /� / / % // --�� \ ( THIS PLAN) / / T07AL Tc= 0.18 hr -+"/ / 1 f / / / /- ❑ - --- - _ 1', `,, \\ - ' �•'-�/ 10' 0 =' w/ dELE V=6'; (Tc=0.14 rs)\ _- / i ` .� \ / ,, - -- / ❑ // i \\--4.74-ac:�� I � - .' '^'�❑ / 00 OF IC -❑LOW w/ d EL V=40' (Tc�❑rs / / // CN=61 - \ / " /�/� \ y , t - -- - \ \ `,\ \ \ ❑ \ Q' SUBAREA C ✓ \ \ / i - N \\ w N X i / / ❑ / / / \ Tc=0.27 hrs, / / s J. / / ❑ II / / / y / PHASE I SUBAR (THIS PLAN / - - i / L / '� " \ / ❑., / D' E OL w/ Ev=av ❑ / -� ✓' - 8.87 ac. / / / . \\ \ - - / EAS A & B 6\nrs) < CN=63 / / / \ y - /i ❑ //i❑// ❑ / 1 /! l CONC. FLow w/ d / / \ tiLEV=,% (Tc=OOZ hrs) ,� ❑ �❑ /I jf `❑mil !l / ' � I I I L9 SUBAREA'$ \ ❑ �i V/ - /� �(TNFS PLAN' / // ! / // /--❑^%l/// f' y� _ _ �_.�� _ '� ❑�%//� �// /ii T �JIM,__ - / , - - - - / Tc=0.18 hrsLU . J, CN I r _ 1 / / I, �� \ - -_- _ _ \ _ �❑ - - - - _ _ ` _ ` _ \-..� / \ (r- r'' N / / LOCATION OF APPROVED PHASE I N a LEVEL II BIORETENTION BASIN /++ PCs I 1 i 'Y❑ / — __� � � � / •' / //' /i / � �V � /// / - / —`_-_ -—. Z -�-- � — ---� < LU �. — / / ,' �. / / //( _ — _ I / 000eo. %6� — —LU x / / / ( ,«� - - ,^ _�/ j��,. / / / - / y /❑ - \\ \\\❑\,,\_/, \ \ - 'I ah moo° -- J / — \ / nl —�` \ i `I'_ l� fib, / /'� _ / — / i / / — J _ / i �'' ❑ ' L — \ — — \� ❑._\` \\❑\'� \ \ \ \ \ ❑� - '� ooeo i — — — - — — — a i a / \ — v / � A r❑ �-'"' � - - � �' _� _ _� _- - �� � � �❑ — �- /// � A VAS❑A � � - - CO Lji / \ LU CONNECTOR ROAD \ � / \ �s . - - � _ � - - , � " . / ❑\ \ ❑ - ��� ' ', JI/'�. _ SUBAREA A -I LU _ I �\ \\�❑\ \\\ °°o °e�°°� � - ee °°eee°°e � - -_ � — ❑ � °a°ease ❑ \ = i V 1 v v / y / v �' ❑\\VAv vAv❑ L TION'OFPR �� 1 �' _ LL 1 ❑ ❑ I vVA VV A \\- COT�]N ROADLEVEL II�r - ��� \ I I ❑ \A \��❑ V�AA� \ �v 4 v BIORET MOAN BASIN Ul 06 ❑ V� ��-_ _ - i / VAA V`. 1 r _ - \ �/ / // /'� ❑// / \ LJJ V / LU U rl LU ❑„LU 0 0 v - ❑, ' J - - o v / v - / ❑//' Q CL O O /+ �W WATERSHED SUMMARY FOR SUBAREA B 0 \ / / O > ' N W CIN Area, 1-year Flow, 2-year Flow, 10-year Flow, \ / / / 0 O u ❑ cfs cfs cfs O \ �❑ \ \ \ \`' I P \\// DAB (Pre-Dev.) 65 65 8.3.39 4.74 8.46 21.48 \ `.\ impervious Area Summary Pre -Development Subarea B W ❑ � ❑ \ \ `� Existing Residences 43,350 sf a WATERSHED SUMMARY FOR SUBAREA C ) \ ❑ / / "Existing Roads 13,750 sf 57,100 sf o Lu n - Area, 1-year Flow, 2-year Flow, 10- ear Flow, \ \ General Do-astruction notes for Stormwater Management Plans CN y 1 \ ❑ l \ \ Impervious Area Summary a V) 1. All dams and constructed fill to be within 95% of maximum dryac. cfs cfs cfs \ / \ \ 1 /\ /� � Pre -Development Subarea C JOB No, density and 2% of optimum moisture content. All fill material to DAC (Pre-Dev.) 63 8.87 3.79 7.30 19.26 Existin Residences 24975 sf 1 be approved by a geotechnical engineer. A geotechnical engineer is I Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 g 182154 to be present during construction of dams. Pre-Dev. Subarea Post-Dev. Subarea Existing Roads 19 425 sf 2. Pipe and riser joints are to be watertight within stormwater WATERSHED SUMMARY FOR SUBAREA D Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection SCALE management facilities. - 44,400 sf 1��=100� CN 3. For temporary sediment traps or basins which are to be converted Area, 1-year Flow, 2-year Flow, 10-year Flow, 1 1 Section B.3.a (Energy Balance) N/A (Energy Balance Satisfied) 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 to permanent stormwater management facilities; conversion is not ac. cfs cfs cfs 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. to take place until the site is stabilized, and permission has been P 23 obtained from the County erosion control inspector. DA D (Pre-Dev.) 61 4.79 1.29 2.58 8.32 3 3 Section B.3.a (Energy Balance) N/A (Energy Balance Satisfied) Section C.2.a (10-yr Peak Flow is Confined within BMP & pipes) Section C.3.c (Outfalls to mapped Floodplain) Existing Residences 1221 sf - /vd \� ❑-------- \ A I - v --- --- _ - v SCOTT/R. Cb'LLINSZ No. 35791 1�1 `p1 S' 11/6/20��' DISIONAL Y�o NI noI i main j_ , 000 / / — Ica LA Wow %W y�y I owl��/// i // W T TAIL Tc= Yi .ce 100' OF 0'�w d ELEV=5 \Tc-O.1 V � ... � ✓ 1 ,'' -. � --i� "-- - - � � .,� , V / j - - -400- 1 'OF CONC. FL W w LEV=S' c=0 1 i /. - < ' 25C 1 TOT D.23' h V ❑ / ' OF CHI OW 8 s Tc�0.3 Q r A \ � _:� ' .>>� � -, - �100 OF OLF f d EL - r A , • v � Inn' OF HNL�.FILOW 010 ft s TE 0.02 hrs �...L. ❑ /' \. i SUBAREA 1 - / O T1dIS` (THIS PLA ' j \ n \\� ,{Tc=0.1 rsj \ 300' OF OP1C!FLOW w/ d EL-V=2 C�=74 - ../' ,//\\ \. o / Tc=0?19 hrs. li J Tc=0.23 hr . / ❑ i / �;d N \ \ W cD 625' OF CHNL. FLOW 1O ft/ =0.0 - hr / __J : ;� �_ _ ---__ ---- --- - �', ;....Y-' / I -I \ \ ❑ F Q o PHASE I SUBAREAS 12.68 ac. _ / .❑-'r r mow z - / rn CY M LU CSq =i / �� ". �""' .,-'✓ /- � � ( _ IVY '•' - -' � _ a Jg ( l / - _� �- - - - � � � -- {` '. ':> � Mgr: � � Z)- �\ \� \j / -\� - --- -°\.. -.r�� \, - \ � / � I � _ - - -. - - � � _. -_ - - - --- - �\�\ j `"�!�s:-• —LOCATION OF APPROVED PHASE I CV �4 LEVEL II BIORETENTION BASIN LU _ z L.L br 0000 Uj / -- - _-- --_ - - / ❑ V A l vv', _ III -CONNECTOR ROAD ; / _j / \ \ _ ,' \ / / \ \\ \\\❑\\\ \ ❑_ SUBAREA A LU ❑ , __ o / / 1 \ ❑LU \\�\\ \\\\ \ e III $ ❑„ i - - __ 1 1 Ito _ -. \ \ / \ / / \ \\ \\ \�\V� A�V\.\\AA\\ V\A\\\\A\ A i\\y\\ \ \\ _•`�' ?eo¢oo- ae o�on. °%� J do oI o eoaaooa°o°oo - X e� I IIIII, - �_ ' ❑ - ❑ ---�_ �\� - Y \ ❑ I \ \\ \\\\ \\\`� ❑.i I ❑ ' \_ LOM OTITNOf PBR II NTIOASIN i ❑/� Li/_ w.� \ \ \Y u VA /A ( �� U z 1 v woo \ 20w_' / V v _ / / ❑:�i /// ❑ v y\ v W W / ❑ � - , -r� / / // / ❑ Ln I I \ ❑/ ❑ \ G ( //� i/ / / / \ r U L a - - - - --L ❑ O_ / / - / /ii/ / / / ❑ v�❑v W z LU 0 STORMWATER MANAGEMENT (WATER QUANTITY) NARRATIVE; Q A 1 �\ ./ i /�/ i! CD 0 OVERVIEW: ❑ .. C\' \ ❑ \/ -x J. i r/. v J `' O W L] 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 , I �i / //'- O REQUIREMENTS. PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR / "' N W _ ADDITIONAL DETAILS PERTAINING TO THIS PLAN's STORMWATER QUANTITY COMPLIANCE. CN Area, 1-year Flow, 2-year Flow, 10-year Flow, ❑ - cfs cfs cfs WATER QUANTITY SUMMARY ac. \ \ f 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 SYSTEMS. THE PROPOSED STORM SEWER SYSTEMS DISCHARGE INTO THREE PROPOSED STORMWATER / O ❑ _!!��� MANAGEMENT FACILITIES, EACH OF WHICH HAS A CONCENTRATED OUTFALL. SWM FACILITY 'B' ATTENUATES RUNOFF FROM SUBAREA T', SWIM FACILITY ATTENUATES RUNOFF FROM SUBAREA C AND SWM FACILITY _ - - WATERSHED SUMMARY FOR SUBAREA C d -'D' ATTENUATES RUNOFF FROM SUBAREA'D'. CHANNEL AND FLOOD PROTECTION ANALYSES WERE Impervious Area Summary Impervious Area Summary Impervious Area Summary �1 0 PERFORMED AT ALLTHREE 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 IJEFROM 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 1 DA C (Post-Dev.) 74 8.87 1.29 3.99 20•� proposed Sidewalk 5,050 sf Proposed Sidewalk 12,825 sf Proposed Sidewalk 7275 sf STOP AT THE SWM FACILITIES SINCE SUBSECTION B.3.a IS MET.. FROM A FLOOD PROTECTION STANDPOINT, 182154 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 Proposed Driveways 12,915 sf Proposed Driveways 11,475 sf 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- 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 WI CN 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 SWIM FACILITIES FACILITIES 'C' AND 'D' AND THEIR OUTFALL PIPES). THE FLOOD PROTECTION LIMITS OF ANALYSES FOR SWM 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 r - - POST -DEVELOPMENT SWM WATER QUALITY PLAN: - - OVERVIEW:ER MANAGEMENT WATER QUALITY NARRATIVE: / - - I UP THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM REQUIREMENTS. AN - _ - - -- _-- / OVERALL ANALYSIS OF PLEASANT GREEN's PHASE I, PHASE II, PHASE III AND ITS CONNECTOR ROAD WAS ' ` r - _ - - PERFORMED TO ENSURE COMPLIANCE AS A WHOLE WAS MET. PLEASE SEE THE ATTACHED STORM WATER - -- - -- - - -' �- i� - --_ - - \ THE TOTAL ESC LIMITS OF DISTURBANCE i _. - - = - - - - - - �' .._' \ MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS PERTAINING TO THIS PLAN's WATER �\ �• _ / � • -- -- __ -- N' - - '- ,-- _� i // :. �. � � - - � � � / �` c QUALITY COMPLIANCE. BOUNDARY, AREA=32.04 acres, IS USED FOR THE --� _ --- ---W- / ' \ �/ �- C 91 "�_ "•' �` ``y /� � . o%� � � � � S OTT R LLINS� - v" r TOTAL VRRM BOUNDARY FOR WATER QUALITY / U� No 357 WATER QUALITY SUMMARY Q - - - - -_-. - .,, ,,,,. ": 5` . : ' - >. /:.� _.._ 11/6/20 �4 THE BOUNDARY FOR THE TOTAL LIMITS OF DISTURBANCE ASSOCIATED WITH THE CONSTRUCTION OF "/ � � � . _ _ ,. I , , ; / // _ / j ,� ">1 ��� 1/,i PLEASANT GREEN (i.e.. PHASES 1-3 & THE CONNECTOR ROAD) WAS USED FOR THE BOUNDARY FOR THE - _ - - t,: ;.--•` ,_ `.: -- -'s, ' ;..;, A , ,`^,b ;I ' ; ' c / �/ ' -�i +� A VIRGINIA RUNOFF REDUCTION METHOD s WATER QUALITY CALCULATIONS. THIS. BOUNDARY AND ITS 000 000__- ;>--._-_ :_-�. _ -,. _ .. ,�•y. ,y A. ; ) /;: , �,° ZONAL E DISTURBANCES TO AN EXISTING SWM FOREST & OPEN SPACE EASEMENT YIELDED AN OVERALL REQUIRED .'- PHOSPHOROUS REMOVAL RATE (25.721bs/yr). THIS PHOSPHOROUS LOADING WAS MITIGATED THROUGH 000- `� * r „� . _- '� ' / ✓ �/ / �/ % ��' ` THE IMPLEMENTATION OF MULTIPLE BEST MANAGEMENT PRACTICES. ' p ' 00 ! ❑ \ _ - - - . _.. / // //. j / PHASE I (WPO 201900003) HAS BEEN APPROVED WITH A PROPOSED LEVEL II BIORETENTION BASIN 000 - 000 ;. :• w __ ,_ , ,._ , _ �•� ,,,, •.., �. / / TREATING SUBAREA E. PHASE I ALSO UTILIZED THE BEST MANAGEMENT PRACTICE OF PURCHASING s ' •'s-- •may :. '.,P •^ I // % , • .''% --- NUTRIENT CREDITS. THE CONNECTOR ROAD (WPO 201900027) ALSO PROPOSES A LEVEL II BIORETENTION ♦ � ' .r✓ . ... - ` = � • , ��� - „.: / \ 1 � 0 ` 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 i IS SHOWN ON THIS SHEET.- �� �o AFTER THE IMPLEMENTATION OF THE ABOVE BMPs A TOTAL PHOSPHOROUS REMOVAL RATE OF 27.62 Ibs r IS PROVIDED (20.65 Ibs/y REMOVED + 6.97 Ibs/yr NUTRIENT CREDIT PURCHASE). THIS IS A SURPLUS OF y 1.90 Ibs/yr 27.62-25,72). ALSO, 80% OF THE REQUIRED PHOSPHOROUS REMOVAL RATE IS TREATED / ONSITE AND EXCEEDS THE MINIMUM 75% THRESHOLD. I o WATER QUALITY GROUND COVER SUMMARIES i \ - �� ;' �• ,3 1, �' _ u, / n / y , �' A � J � �,"�-_ .:.,. ,,, _ ., SUBAREA D Phase I Limits of Disturbance 13.15 ac. � � �" � Connector Road Limits of Disturbance Phases 11 & III Limits of Disturbance not 16.99 ac. \ 13 Previously Covered under Separate Permit K `,, �,I \A a Total Limits of Disturbance = 32.04 ac. � � / � - / ' �- s _ � / � � I � � �� � � (Used for VRRM Water Quality Boundary) _- -_...tea_ _i -_ �� rT- I� <, � / ('. �.J � - - // III z / X Approved Phase I Impervious Areas- Soil Type B 4.55 ac. �' - / .-` / / :, " ��, �.� m z Connector Road YP Im revious Areas- Soil Type A 0.51 ac. \ ' -'- m -< P / Phase If Impervious Areas- Soil Type B 6.72 ac. \ r _ �� �., , o j LU � Phase III Impervious Areas- Soil Type B 2.26 ac. / - - / • , - Total Im ervousAreas= 14.05 ac. „ ' _ Managed TurF Areas Within LOU- Sod Type B y Managed Turf Areas WithinLOD- SoilTypeA " � Total Managed Turf Areas= 17.99 ac. i 1✓ SUBAREA / /V \•�' ' - _e.. -°-_ ,� SUBAREA E APPROVED LEVEL II BIORETENTION BASIN \/ / \. w ,,.z P� - _ - ..' �i7 (ASSOCIATED WITH PHASE I, WPO 201900003) - - - � �� i ' �- - \ / \ "� • �'� /A" COVERED UNDER SEPARATE PLAN i i- �� - f-- ,,o /,•' ,.� / ° - _ - `.., '�APPROVED LIMITS OF DISTURBANC , o ✓ Phase II Proposed Impervious Area Breakdown -_ \ �e w i jam.- - Roads 85,500 sf - RROPOSED LIMITS OF DISTURBANCE) a ( r -�. / _ = P P � �, � � � � � ,„� (ASSOCIATED PHASE I, WPO 201900003 & � PROPOSED LIMITS OF DISTURBANCE ' '•.� Sidewalks 30,800 sf _ _ �\ - - - ' ( SSOCIATED WITH THE CONNECTOR ROAD, WPO ti - , - -- -- - - - - -�;� *•-' - / ; -{ASSOCIATED WITH THIS PLAN) NOT `019000-27)- COVERED -UNDER SEPARATE PLANS PREVIOUSLY COVERED UNDER A� Detached Residences 62,640 sf Attached Residences 79 800 sf \ I I o0 0 oo° °°o SUBARE� - - .SEPARATE PLAN " / , - - Driveways 34,110 sf \\ \\\ `\ - - s 292,850 sf \ \ \ \ \ \\\ �, a°°°L9 Phase III Future Impervious Area Breakdown - - - - -14,650- - -- i Roads sf / - _ - _ _ �N•/ - Attached Residences 62,250 sf \ \ \ k\\\o; \ MATCHLINE, SEE - - ��' ' F - - - - - -- Driveways 21,420 sf _ � , I THI- ` � 98,320 sf C' ) SEE V MATCHLINE ' _ Q r I EET � \ PRE -DEVELOPMENT SWM WATER UALITYPLAN: �-� / / � I � s—.� co °' ° k' i I I � i — r % � a � — ] � — — —. J �— / . ✓ it � i THE TOTAL ESC LIMITS OF DISTURBANCE - - i — -- - ;�� ��w - _ - " ' - =: - - -- - - o CN LU / ---.��� % // a. i _ A / ° BOUNDARY AREA=32.04 acres IS USED FOR THE ° TOTAL VRRM BOUNDARY FOR WATER QUALITY ' `-': //' y.- \ \ `\ . N -SUBAREA -- \ 40 LU row x L CA ON OF P -0PO ED L EL _I-D / / / / - I \ :,", �.. - - �:. _ / _ _ �� BIORE EN ION BA N (A SOCI TED WI � ,� - � �///G � i/ �_.ti �.• \ \ „-. � � ., - � `'�.-� !, i� / LU LU THE C NN R OAD WPO 201 02) i� l" S� / AI - / / / / i i __ -r. - __. - / ' ) V . -,i ��,. - \ V RE TE ED UNDER UEPARATE PLA i- / , - ;.L9 LU I APPROVED LIMITS OF DISTURBANCE ANCE-- / - \ :� o / / / - _ v // -./ AA I V /. - rA _ n z (ASSOCIATED PHASE I, WPO-20196A00J) & % .- - - /i \ \ i �. - - " / / / / / i / -�_ /\ - / / / I / \ , < PROP SED LIMIT�DEREPA BANCE _ I / ..: %� a �l (A OCIAT D WITH THR ROAD, W�PO . A t ' - -� A X \/' -� V - / ,,. i / / / / / / -'"- / /'/ �l / / X V ( ,.,/ �k'", T. ���11_V QLU 201 ),)F OVEREDRATE PLANS -/ - / - - - i -- y / / / / o _ / / / / / / �\\ A `i '' ��V�;r �� A \ Z c A/ , LU LU �, � / ' � r / - / ' � v -_ - // / I III / LU LU Uj - , 06 /\ i ` / / / i - - �/ - - / / / / , %, - -- - \ _ F APPROVED LEVEL II BIORETENTION BASIN v, - -,«- - - - m.� "� SUBAREA E' V / / / /' - �� - -_ �- - - - - -SUMMARY OF PHOSPHOROUS REMOVAL RATE REQUIRED j� (ASSOCIATED WITH PHASE I, WPO 201900003) C)LU - A 1 COVERED UNDER SEPARATE PLAN Total Phosphorous Removal Rate Required for Proposed Pleasant Green Phases I, II, III and the Connector Road 25.35 Ibs/yr U �I 0 V) Additional Phosphorous Removal Rate Required for Connector Road's Impacts to SWM Forest & Open Space Esmt. 0.37 Ibs/yr "zr Total Phosphorous Removal Rate Required 25.72 Ibs/yr APPROVED LIMITS OF DISTURBANC (ASSOCIATED PHASE I, WPO 201900003) & SUMMARY OF PHOSPHOROUS REMOVAL RATE PROVIDED ----PROPOSED LIMITS OF DISTURBANCE ,\ (ASSOCIATED WITH THE CONNECTOR ROAD, WPO / / 1 PROPOSED LIMITS OF AISTURBANCE Approved Phase I (WPO 201900003) Phosphorous Removal Rate Achieved from Nutrient Credits 6.97 Ibs/yr _ (ASSOCIATED WITH THIS PLAN) NOT ( ) p ( ) °° 01900027) COVEREDUNDERSEPARATE PLANS tj w / I PREVIOUSLY COVERED UNDER A / e°?° T ° SEPARATE PLAN Proposed Phosphorous Removal Rate Achieved from Phase II s Outfiall to Conserved Open Spaceso(Suba (Subarea area A 6.39 Ibs/yr o °°°° e8 ° °,, 4' °, \ a cn �— oo° °go SUBAREA A \ _- __ ' - JOB NO. Proposed Phosphorous Removal Rate Achieved from Phase I I's Outfall to Conserved Open Spaces (Subarea C) 7.07 Ibs/yr 1 i ° p P P p ( ) ° `"°°° - — — — — — — — — — 182154 - - - Proposed Phosphorous Removal Rate Achieved from Phase I I & III's Oufall to Conserved Open Spaces Subarea D 4.60 Ibs/yr _ Approved Phase I (WPO 201900003) Phosphorous Removal Rate Achieved from the Level II Bioretention Basin (Subarea E) 1.42 Ibs/yr \ _ ; " _ 4 K °°° SCALE - C -' - \ ' 27 62 Ibs/yr MATCHLINE, SEETotoI Phosphorous Removal Rate Provided Total Phosphorous Removal Rate Provided Onsite 20.65 Ibs/yr THIS SHEET SHEET NO. ° 25 /o Percentage of the Required Phosphorous Removal Rate Treated Onsite (20.65 / 25.72 x 100) 80 _ J STORMWATER MANAGEMENT FACILITY 'B' DETAIL, SCALE 1"=30' i 'SEE THIS SHEET FOR 4 SCALED PROFILES OF ti. / PROPOSED BASIN'S FLOOR SHALL BE � THE SWM FACILITY TYP. `-� -- - - - ---- _ SLOPED TO DRAIN TO THE RISER o. %MIN s t _ \ WITH POSITIVE SLOPES THROUGHOUT. TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL EMBEDDED 6" INTO AN 18" SERVE AS THE RISER's LOWER SECTION, IN CONJUNCTION WITH THICK REINFORCED CONCRETE THE PROPOSED REINFORCED CONCRETE FOUNDATION. A \ / FOUNDATION I - - % COMPLETE S / 2 8' STANDPIPE WITH A RIM ELEVATION OF 747.33' SHALL COMPLETE AND BURIED BELOW GROUND. �----1+00 -' �� � � -. . �-- THE STRUCTURE. RISER INCLUDE (1) ONE PERMANENT 06 � / = LOW FLOW ORIFICE WITH AN INVERT ELEV 739.75 AND (4) FOUR PROPOSED VARIABLE WIDTH S PERMANENT 12 MID FLOW ORIFICES WITH INVERT ELEVATIONS OF .SWM-&ACCESS ESMT. // �� 33'. 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. L PROPOSED io'WIDE GRASS LINED, GRADED / SWM ACCESS (z%MAX. CROSS SLOPE) '\ PROPOSED zo'WIDE VDOT L. AI- _, RIPRAP LINED EMERGENCY SPILLWAY W/.4:1SIDE SLOPES & FILTER FABRIC�x UNDERLAYMENT (STONE DEPTH=18"). 1o'WIDE TOP OF DAM SPILLWAY CREST ELEV.=-74833'• 75 ELEV.=o.00, TYP. STIR 13-102 EXISTING 100 YR FLOODPLAIN PER HEO RAS ANALYSIS PERFORMED BY COLLINS ENGINEERING IN APRIL \ S E 2019, SEE WPO 201900027. A _ - - 7 - - WPO STREAM `. BUFFER, , TYPL i S 3+00 - STIR B-104 \ PROPOSED STIR B-107 A 012" LOW -FLOW OUTFACE CARRYING THE TREATMENT VOLUME FLOW TO LEVEL SPREADER B' (75.5LF OF 012" HOPE @ 1.00% (II=736.37, IO=735.61) a PROPERTY LINE; - - TYP. A o� 4�EL / \ VDOT MH81 '� ' STIR B-109 - RIM=738.75 , \ /' 59A LF OF 012" HDPE @ 1.00% PROPOSED FLATVDOTCL.AI RIPRAP - \\ / (II=735.51, 10=734.92) I - LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT -- --_ _ \ /' STIR B-110 (L=11, W1=4.5, W2=8.3', D=i8) ,/ 3+75 - \ VDOT MH-1 i RIM=738.66\ i v/ STIRB-111 \ 6.67 LF OF 012" HDPE @ 1.000/b\ \ (II=734.82, I0=734.75) \\ I\•'� \\ ��. \ PROPOSED VDOT STD. CLASS AI RIPRAP LINED OUTLET PROTECTION PROPOSED7z'LONG FLAT LEVEL "WIDE IGID LS TO HAVE A 12" DEEP PLUNGE POOL & 6"WIDE RIGID LIP. LS WITH FILTER FABRIC UNDERLAYMENT (L-8', W1-3, W2-9', D-i8') TO INCLUDE AVDOT CL. Al RIPRAP LINING AND A SLOPED �� 734.75 BEGINNING OF LEVEL SPREADER 3S(MIN.) FROM T E RIPRAP LINED EMBANKMENT - � \ `'., �� �• DOTING GRAMF ALL RIGID NCLUDE FILTER TO THE 733.5\BOTTOM OF LEVEL SPREADER EXISTING GRADE. ALL RIPRAP TO INCLUDE FILTER FABRIC 734.5- TOP OF LEVEL SPREADER ,..\ UNDERLAYMENTS & BE A MIN, OF 18" DEEP. 7 j \ x \ \ \ x7 PROPOSED .- o' 2'CONSERVATI A � � 5 i � \ EASEMENT. AREA WITHIN EASEME �1 TO REMAIN UNDISTURBED &TO BE 733.8 W �L./ - -- �36 eT(Qi - \ �•. LOCATED OUTSIDE OF THE LIM ITS DISTURBANCE. EASEMENT PREVENTS \ \ \ FUTURE DEVELOPMENT, a DISTURBANCES &SITE CLEARING. � � 733.0. 732.4� �, �, p I UKIVIVVA I tK IhAINA(3tIvI tIV I F-A1.1L1 I Y 'LUt I A1L, SCALE 1"=30 0+00 -- - SEE THIS SHEET FOR ' SCALED PROFILES OF THE SWM FACILITY, TYP. i TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY - EMBEDDED 6" INTO AN i8" THICK REINFORCED CONCRETE FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. \y- \ 0+00�� - PROPOSED io'WIDE TOP OF DAM (WITHA r MAXIMUM CROSS SLOPE OF 2%) TO SERVE AS A SAFETY BENCH. TOP OF DAM ELEVATION=728:0'.- c PROPOSED 35WIDE VDOT CL. Al RIPRAP LINE EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & / FILTER FABRIC UNDERLAYMENT (STONE DEPTH=iB" ). SPILLWAY CREST ELEV.-726.5o'. / 717.E „ � PROPOSED 86' LONG FLAT LEVEL SPREADER'C'. LS TO HAVE A 12" DEEP PLUNGE POOL &6 WIDE -- 717:4 ' RIGID LIP. LS TO INCLUDE A VDOT CL. AI RIPRAP \ LINING AND A SLOPED 3' (MIN.) VDOT CL. AI RIPRAP LINED EMBANKMENT DOWNSTREAM �\ FROM THE RIGID LIP EXTENDING TO THE EXISTING _ _ GRADE. ALL RIPRAP TO INCLUDE FILTER FABRIC 71 6. �6• UNDERLAYMENTS&BEA MIN. OF28"DEEP. —6 716.E-A o EXISTING 100-YR FLOODPLAIN PER HEC-RAS. ANALYSIS PERFORMED \ BY COLLINS ENGINEERING IN APRIL 2019, SEE WPO 201900027, \ / / PROPOSED CONSERVATION \ 5o'x86' J _\ EASEMENT. AREA WITHIN EASEMENT -Fr TO REMAIN UNDISTURBED & TO BE \ LOCATED OUTSIDE THE LIMITS OF 75 Ir q- DISTURBANCE. EASEMENT PREVENTS I \ O FUTURE DEVELOPMENT, 1, DISTURBANCES & SITE CLEARING. PROPERTY���5 LINE, TYP. 0+ --PROPOSED BASIN's FLOOR SHALLSLOPED TO DRAIN TO THE RISER(o:5^h MIN.)WITH POSITIVE SLOPES THROUGHOUT. V T D.. B-1 (CONCRETE MANHOLE BASE WITH A 4 SHALL SERVE AS TH \ �\ A DO LOWER (O O S 0 8) E 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 F� \ SHALL PERMANENTLY PLUG ANY EXISTING TEMPORARY ESC DEWATERING 36\ \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. 0. GENTLY SLOPED AREA AT THE TOP OF THE RETAINING WALL TO SERVE AS A SAFETY BENCH FOR THE DETENTION BASIN. _ NA RETAINING WALL TO ALSO INCLUDE �\ HANDRAILS MEETING MINIMUM STATE & -- -- - >T COUNTY BUILDING CODE REQUIREMENTS. _ -PROPOSED io'WIDE GRASS LINED, GRADED SWM ACCESS (\\%zCR055 SLOPE) \\_ TR G ' PROPOSED STIR. C-io7, A 012" LOW -FLOW OUTFALL CARRYING THE TREATMENT VOLUME FLOW TO LEVEL SPREADER'C' (i2.00 LF OF 012" HDPE dal o.5%, II=718.41, 10=718.35) PROPOSED VDOTSTD. CLASS Al RIPRAP LINED OUTLET PROTECTION (- WITH FILTER FABRIC UN DERLAYM ENT(L=8', W1=3, W2=9', D=i8") -- 718.35- BEGINNING OF LEVEL SPREADER 717.1- BOTTOM OF LEVEL SPREADER a � � Ln 718.1- TOP OF LEVEL SPREADER V �\ A 2+00 /,A\ Z� V / \ w \ STIR C-104 \T i \ ST C 10PROPOSED VARIABLE WIDTH WPO SWM &ACCESS SMT.\\\ / BUFFER, TYP. / PROPOSED FLAT VDOT CL Al RIPRAP LINED OUTLET PROTECTION WITH / FILTER FABRIC UNDERLAYMENT(L=25', W1=4.5', W2=11.5', D=i8') / GENERAL SWM NOTES: i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON SHEET 27, OR EQUIVALENT, FOR INSTALLATION. 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH 3.14 SPECIFICATIONS. 3 CONTRACTOR SHALL HIRE ATHIRD 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 OF95%OF MAXIMUM DRY DENSITY AND 2%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 OFALL PERMANENT FACILITIES SHALL HAVE 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. ATTHIS 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 A YEAR TO PREVENTFURTHER WOODY GROWTH AND SPOT RE -VEGETATION OF THE CONSERVATION AREA IS REQUIRED IN ORDER TO MAINTAIN A 9 o%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 MINIMUM: i. ENSURE FLOW PATHS ARE NOT SHORT-CIRCUITED IN THE LEVEL SPREADER AND THROUGH THE CONSERVATION AREA. 2. ENSURE DEBRIS AND SEDIMENT HAS NOT ACCUMULATED. 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%OF THE CONSERVATION AREA. IN THE EVENT MAINTENANCE IS REQUIRED DURING THE ABOVE NOTED INSPECTIONS, CORRECTIVE MEASURES SHALL BE COMPLETED IMMEDIATELY. 765 A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH 048") SHALL SERVE AS 7HE RISER's 760 IN-CONJUNCTION-AVITkETH€-PROP GEADL-REINFORCED CONCRETE- �-OW€I-SECTION, FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 747.33' -HALL COMPLETE THE STRUCTURE. RISER TO INCLUDE (li ONE PEF2MANEN 06" LO -FLOW RIFICE WITH AN INVERT ELEV.=739.75, AND (4) FOUR PERMANENT 1 "M„�ID-F OW ORI ICES WITH INVERT OA-SHALL P EXISTING ELEVATIf3N5 OF 745.33-coNTRAC '""' 7UUG TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME OF THE FACILITY's CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE STATE AP ROVED TRASHRACKS, 755 755 TYPICAL SEE THE DETAILS ON SHE QUIV ET 27, OR EQUIVALENT, LENT F R ADDI IONAL INFORMATION. WIRE F PROPOSED .l1 DAM EL75o.0 (MAXIMUM CROSS SLOPE OF 2%). .CONTRACTOR SHALL INSTALL 750 EMBANKMENT IN ACCORDANCE 75U THE DESIGNS S OWN ON SHEE 27. RIPRAP _ STR. B-1(12 VDOT M P OPOSED FLAT VDOT CL. A g / -1 LINED O TLET PRgTECTIOI)1 WITH RIM=747 5 FILTER, FABRIC UNDERLAYMENT (L=i ', Wi=4.5 Wz=8.3',ID=i&') 745 P OPOSED 745 GRADE 1 100-yr PEAK WSE=748.92 10-yr PEAK WSE-747.29 - STIR. Ba 4 2-yr PEAK WSE-745.86 VDOTM -i 1 PEAK WSE-745.12 X STI RIM= z ob yr GRADE � 1 740 �� 740 o. PROPOSED BASIN'S FLOG SHALL M N. - BE SLOPED TO DRAIN TO THE 1 RISER ( 5 o. %MIN.) WITH POSITIVE SLOPES THROUGHOUT. S R B-101, 122.5 LF OF 018" HOPE 735 @ 0.50% (II=739 48, IO=738.87) 735 TO PREVENT FLOTATION THE RISER BASE SH LL BE FIRMLY STIR B-10 0 88.9 LF OF 018" HOPE @ PROPOSED STR. B-io5, AN I EMBEDDED 6" IN O AN i8"THICK REINFORCE CONCRETE 0.50 (II=738.77, IO= 3833) DA HIGH -FLOW BYPASS QUITE/ FOUNDATION TH T158'x8l, AND EDRIEDBEL WGROUND. VDOT ES-i(46.33 LF OF PROPOSED TR B-107, A 012" LOW -FLOW OUTFALL CAR YING HDPE Lalo.50%, 11=738.23, 10: THE T1EATMEEI VOLUME FLOW TO LEVEL SPREADER T' 730 (75.SL OF 012' HDPECO 1.00% (II=736. - 7, IO=7 5.61) 730 J W J] 04 (0 � Co. 00 0) p � cD (0 0 of O W W O ri O r6 (N O 0 C5 `0 Ib Ln (D CN 4 M W I` ^ I` ^ r rl 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" W FOUNDATION TH/ 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, TYPICAL. SEE THE DETAILS ON SHEET 27, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. 740 EXISTING GRADE CONTRACTOR SHALL INSTALL EMBAN MENTI ACCORDANCE / THE DESIGNS 5 OWN 0 SHEE 27. 730 PROP SEDio' IDETOP FDAM ( T A AXIMUM CROSS -LOPE OF 728.97 0 a% TO ERVE AS A SAFET BENCFI. 7 26 53 TOP F DAM E EVATION= 7 z8.o. 725.43 -- -- STR.Ca 4 724.48 VDOTMf -i 725 �� RIM =724-54 -. /,- , ro PRO ED z :GRAD STIR. Ca VDOTM -i FLOOR SHALL BE RIM=724. 0 7 ti RISER(0.50/a MIN.)- - ---- S THROUGHOUT. 0 50 " I ITION THE RISER BASE SHALL BE FIRMLY O AN 18" THICK REINFORCED CONCRETE ,T IS 8'x8', AND BURIED BELOW GROUND. 715 ST R. C-ioi, A PROPO ED Hi8" RDPE BA REL (45.5a LF OF H PE �o.g %, 11=718.75, 10=71 .51) F ROPOSED STIR. C-i o3, AN 18" HIG -FLOW BYPASS ROPOSED STR..C-io7, A 012" LOW -FLOW OUTFACE CARRYING ' UTFALL (55.00 O LF OF 018" THE TREATMENT VOLUME FLOW TO LEVEL SPREADER IC iDPE (al 1 .45%, 11= 19.41, (iz.00 LF OF 01z" HDPE Cal 0.5%; II=718.41, 10=718.35) 107 16.52) 7101 > > J J r( o r O N 0 c77 0 O O ww mcd Ln Nvi Nvi 0) (6 W W 0+50 1+00 1+50 2+00 2+50 2+75 SWM FACILITY C SECTION h8" ,LL V [8" '738. PROPOSED 20 WIDE VDOT CL AI RIPRAP LINED EMERGENCY SPILLWAY W/41SIDE SLOPES & FILTER FABRIC UNDERLAYMENT (STONE DEPTH-18"). SPILLWAY CREST ELEV.=74833'- 755 1 755 io'WIDE TOP OF DAM ELEV;=75o. ',TYP. 750 750 /ITH ROOTS D I EXISTING G 00) GRADE ADE 745 745 LJIi W O O 0 Ln . 00 W W O O 't O � O W LO Lo I� r Lei 0+50 0+75 PRO1"=5' FILE S(V) CA LES I SWM FACILITY B SPILLWAY 1 =50' (H) PROPOSED FLAT VDOT CL. Al RIPE LINED OUTLET PROTECTION WITf FILTER FABRIC UNDERLAYMENT (L=25', W1-4.5', Wz=n.S', D=i8") PROPOSED STIR. 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 'WIDEVDOTCL.AI RIPRAP LINED EMERGENCY SPILLWAY W/ 4:2 SIDE SLOPES & FILTER FABRIC UNDERLAYMENT (STONE DEPTH=i8"). SPILLWAY CREST ELEV.=726.5o'. 735 735. 730 730 725 725 AP / XISTIN-/ GRADE 720 720 JJ O Ol O ww � CN � W� r CN r- N r r- r� 0+50 0+75 io' WIDETOP OF DAM ELEV.=728,00', TYP. PROPOSED GRADE SWM FACILITY C SPILLWAY SCOTT R. Cb•LLINS'Z No. 35791 1�1 11 6 20 4 0 ti ssNAL � r E 0 F N 0 ti 0 w O zJ W w ITIM, ri W a En JOB NO. 182154 SCALE AS SHOWN SHEET NO. 26 i 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 50 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 15 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 AM ERICAN 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. S. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE 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 BYTHE 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. STORM WATER 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 15 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 PROJECTAREA IF REQUIREDTOTHE DESIRED SUB -GRADE. 5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORM WATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE 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 INSTALLTHE 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 AT THE 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. Clay Liner Specifications Property Permeability ASTM D-2434 Cm/sec 1 x 1 Plasticity Index of Clay ASTM D423/424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less Dian 30 Clay Particles Passing. ASTM D-422 % Not less than 30 Clay Com anion ASTM D-2216 % 95%oisurd" WWI4etls Source: vlrglnla 57ormwaler Management Hand1)001t I1999) 9. UPON COMPLETION OF THE EMBANKMENT GRADING THE CONTRACTOR SHALL EXCAVATE/GRADE UNTILTHE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. OR SHALL EN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALLTHEN 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 ACCESSTO 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 15 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 OFTHE 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. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) StormRaxTa ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD W INCH RACK SHOWN DIMENSIONS IN INCHES (OR EQUIVALENT) PLAN StonnBaxTM Round Series for Concrete Manhole ►art Na. Win UMB DIMC Min ID Mlnoo RS-24 17ye 14H 1 n 24 30 RS36 21 14 40,t 36 43 0.Sda 27 It 1 54 . 46 57 Rs30 27% lay. 1 6614 60 70 Plastic Solutions, Inc. CUSTOMER PO Box 4386, Wlndlcsta, VA E2600 239 McBee Rd. wlnchesea, VA 72603 877) 877-5727 phorm PROW. 1540) 722.2219 %a htlP/twwn.PI-I c-aoWdur.00rn XpPE nRVLNPN. PUr11C9Y PLWTM:90lU'k1Na MG ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTION$ CROSS BRACING FOR OVERHANG HDPE ANTkVORTEX PLATE DATE: OPAWN BY.' N�PO 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 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 ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILLSHALL 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. ew •4 - � COUNTS'OFALBEMARLF. Department of Community Development 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 17-422). It is preferable that the 1 ! 1 i construction record drawn be prepared b someone other than the designer. Please do not g P Pa 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: 1. Inspection Records and photographs for pipe trenches and bedding, including underdmins. 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 treated, 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 may be required for alterations from the design. 6. Plants, location and type. 7. Plans and profdes for all culverts, Pipes, Risers, Weis and Drainage Structures- Display the installed of drains structure culvert/ i size weirsmaterials inlets orend treatment s type drainage P Pe inlet and outlet protection, alignment and invert elevations compared to design. P n. 8 P P� 8. Computations: For significant deviations from design, provide sealed computations verifying that the as -built condition IS equivalent or better than design. �iJi 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical sections and linings. 10. Easements -Show all platted ease ments 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 - biofilter 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. BiofLlter media must be an approved state mix. 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable, 14. Compaction reports am required to verify fill compaction in dams. P PP 15. Manufacturers certifications for proprietary BMII certifying proper installation and functioning. 1 /2' zinc plated hook attached with O18 fastener • 2-1.'n" el . (DOH halas di Isometric t t/4' IRO PE pieta (optional) Ppe culvert �! elm r NDPr el calplastic with 0 2-7/8' holes and 1!4' plate manufactured by OO 'IaaUc 00 3olutians Inc. rr equal 000 0000 •• 'I.,r........... : ,4 +e/y - 4 • ehawo nth opbonal pus:• t1 n•r✓.�. AYa: a I HDPF Lnlnl.urnl plastic w 2-1/0 holes and 114' pM,- 4CC Lion enarafactured by Plastic 5'8' din hole 0 0 o o O O 0 0 sin le 81.IP R Elevation orl!wc PLASTIC DEBRIS CAGE .OLUTiON. P O. Box 380 e a nincnesta YL 22E0/ INC. 877-877-6727 rrr.plepic-wlwoecam SECTION A-9: TIPIC:IL G&APffiCAI. DETAII.S Harrogrrrrout fill 4' min "t Cut off trench-4' below suitable I material 8011 or rock L - _ _ - -------� TYPICAL HOMOGENEOUS EMBANKMENT l.9arnd around SI-t o 5 Perforated (�Ilector Foundation drain FOUNDATION DRAIN drein Sdrd, gravel or rod. ,74/4f0N Outlet 77 �ROGk tOC 4Transition filter CHIMNEY DRAIN Transition fill -Rock or gravel Blanket drain BLANKET DRAIN Rock or gravel Alain TrormiNcin filter TOE DRAIN Figure A-13. H0106ge7teons ENlbankntents W Seepage Co»trots VA"P_D C STORMWATER DESIGN SPECIFICATION NO. 2 SHEET FLOW TO FILTER OR OPEN SPACE KEY LEVEL SPREADER INTO EXISTING GRADE RIPRAP PLUNGIE POOL RIPRAP APRON - �6' REATED ,t X TIMBERS OR I.: CONCRETE LIP -, _ • ..•:.:� Y �-.. ;• LENGTHEL OF LEVEL SPREADER QO% ) 11 LIP TO BE 13AGED ON DES;GN FLOW - ,11 AND ALLOWABLE VELOCITY ) ' TOP OF LEVEL SPREADER "T1l 'i SHALL BE FLAT li 1-3 IN. COURSE AGGREGATE OR OTHER LINING AS DESIGNED FOR STABILITY PLAN VIEW DIMENSION BASED ON 1,11•0I1ML1HBED E:aPfNn GRADE 5% 05:1) OR LESS. IF VEGUATEa DESIGN DISCHARGE FLTGA G7RIP OR CONSEAVAD '2' MIN TFMN SPACE FFI4T 1e1 FEET LE98 a MIN Tit MIN _ -- 3'MIN I 2 1�`'f �y.- MIN. DEPTH BASED O < - i REQUIRED STONE SIZE - Tl I I I I I -11 I T-I I T III III =I 1 I I CII--1 I I I I I I I11 SECTION A -A Figure 2.4: Level Spreader: Pipe or Channel Flon, to Filter Strip or Frese~4-Cons Open Space 5 11KIvIVVA I tK MAIN AU L lvI L IN I I-AIL1L11 Y 'U' Ut I AIL, SCALE 1"=30' 11 EXISTING 100-YR FLOODPLAIN PER � //� HEC-RAS ANALYSIS PERFORMED / BY COLLINS ENGINEERING IN APRIL , 2019, SEE WPO 201900027) 10, _ PROPOSED zo'WIDE GRASS- ' LINED, GRADED SWM ACCESS PROPERTY LINE, TYP.-,, T� (2%M�t )C CROSS SLOPE) I PROPOSED VARIABLE WIDTH` 11 SWM &ACCESS ESMT. Y ( \ SEE THIS SHEET FOR 0+00� SCALED PROFILES OF / I �� - THE SWM FACILITY TYP. 1 PROPOSED 2o' WIDE VDOT CL. Al I R IPRAP LINED EMERGENCY SPILLWAY , w/ 4:1 SIDE SLOPES & FILTER FABRIC UN DERLAYMENT(STONE DEPTH=18"). SPILLWAY CREST ELEV-700.75'. i 1 I p +50 PROPOSED 1o'WIDE TOP OF DAM ELEVATION=702.0' (WITH A ) X MAXIMUM CROSS SLOPE OF 2%). 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 1 FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. y 3 1 II II I1 1 O 1 LEVELSPREADER NOTES: 1. FIRST SO'FROM LEVEL SPREADER LIP MUST BE 2% OR LESS. 2. TIE BACK ENDS OF LEVEL SPREADER INTO THE SLOPE TO AVOID SCOURING. PROPOSED BASIN's FLOOR SHALL BE \\\\\\ 777; SLOPED TO DRAIN TO THE RISER (o.5% MIN.) WITH POSITIVE SLOPES THROUGHOUT. T . _ sr f ° PROPOSED FLAT VDOT CL. Al RIPRAP LINED- '\ OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (L=g', W1=6', W2=6', D=A")rff - 111 Q- ,. i.. a � V- / � e." / � _ � -III .i, LL PROPOSED 64 LONG FLAT LEVEL SPREADER - ,� PROPOSED 01z"LOW-FLOW OUTFACE CARRYING THE I� 'D'. LS TO HAVE A 12" DEEP PLUNGE POOL& O S TREATMENT VOLUME FLOW TO LEVEL SPREADER'D' L.jl 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT (55.25 LF OF 012" HDPE QB o..5o%, 11=694.84, 10=694.73) L,II=11 CL, Al RIPRAP LINING AND A SLOPED 3'(MIN.) % eID I VDOT CL. Al RIPRAP LINED EMBANKMENT PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION DOWNSTREAM FROM THE RIGID LIP - - - - IIIf�lll WITH FILTER FABRIC YMENT - C UNDERLA L 8' W1- ' W2- ' D-18" ( 3, 9, ) I=11=1 t EXTENDING TO THE EXISTING GRADE. AL r �o O � - _T RIPRAP TO INCLUDE FILTER FABRIC _ _ �L UNDERLAYMENTS & BE A MIN. OF 18" DEEP. / - _ � 694.73- BEGINNING ' J-111 / 694.0 OF LEVEL SPREADER Tlllll =I - -_ \ / 693.8 0 LEVEL BorrDE of L- / 693.0 h � o LEVEL SPREADER / ? WPOT = PROPOSED So'x64'CONSERVATION _ =- y�f 9®00 694.5- TOP OF ` ' � STREAM BUFFER,�`(P. EASEMENT. AREAWITHIN EASEMENT�� Y / LEVEL SPREADER;,' TO REMAIN UNDISTURBED &TO BE \ \\ � O / / - - „ ,9 ' ,i / '� ul - LOCATED OUTSIDE THE LIMITS OF III DISTURBANCE. EA - �.,. / / I - EASEMENT TPREVENTS / ��'..7 S M N FUTURE DEVELOPMENT, 692.4 / PROPOSED 100-YR FLOODPLAIN PER HEC-RAS I DISTURBANCES & SITE CLEARING. ._ ',/ ANALYSIS PERFORMED BY COLLINS ENGINEERING I Ildl 1 710 PROPOSED 1o' WIDE TOP OF DAM - ELEVATION=7o2.0' (WITH A MAXIMUM CROSS SLOPE OF z%). 705 CONTRACTOR SHALL INSTALL- EMBANKMENTIN ACCORDANCE w/ THE DESIGNS SHOWN ON THIS SHEET. 700 EXISTIN( GRADE 695 PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT(L=g', W1=6', W2=6', D=18") Ror GR 7�. IN APRIL 2019, SEE WPO 201900027) IlII 9 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- 1" 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 TO-PREVEtNTFLOTATION THE RIE PROPOSED 20'WIDE VDOT CL. Al BASE SHALL BE FIRMLY EMBEDDED RIPRAP LINED EMERGENCY SPILLWAY 6" INTO N18"THICK REINFORCED 100-yr PEAK WSE=700.91 w/4:1 SIDE SLOPES&FILTER FABRIC CONCR TE FOUNDATION HAT IS 10-yr PEAK WSE=700.25 UNDER LAYMENT (STONE DEPTH=18"). B'x8', AND BURIED BELOW I -- 2-yr PEAK WSE=699.99 SPILLWAY CREST ELEV,=700.75'. IROUND. 1-yr PEAK WSE=699.74 1 700 705 I 705 PROPOSED STR. D-ioi, A HIGH -FLOW BYPASS 24" HOPE OUTFALL WITH VDOT ES-2 (48.66 LF 690 OF024" HOPE @o.5o%,11=696.24,10=6g6.00) o' WIDETOPOFDAM ELEV.y02.00', TY.P. v' PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (o.5% MIN.) 0.50% MIN. WITH POSITIVE SLOPES THROUGHOUT, 700 F� 700 PROPOSED 06"STUB PIPE (STR. D-io5)TO DRAIN SWM FACILITY'D' LOW 20' FLOWS (12.00 LF OF 06" HOPE Qa o.5o%, 11=69S.o, 10=6gy.g4). STUB PIPE PROPOSE TO INCLUDE ATRASH RACK ATTHE UPSTREAM ORIFICE OPENING. '� GRADE 1 PROPOSED STR. D-103, A 012" LOW -FLOW OUTFALL CARRYING EXISTING THE TREATMENT VOLUME FLOW TO LEVEL SPREADER'D' (55.25 GRADE LF OF 01z" HOPE Cal 0.50%, 11=694.84, I0=694-73) 1695 695 W LjjJ Co CO r7 Ih N 00 cc O LLI W L6 to CV cc 6 cc Lri CT) d' W 0) CI) (7) D7 0 CO cD LD LD to c0 0 w LVt PROFILE SCALES 1"=5' (V) 1"=50'(H) 2+00 1+50 1+00 0+50 SWM FACILITY D SECTION JJ O M O W W N N CD 0 CDCD W Lt.cc 0+50 SWM FACILITY D SPILLWAY SCOTT/R. Cb'LLINSZ No. 35791 1�1 pow 11/6/20 S 1 S I E 0 NAL _ lu CD 0 ti W N N W N ZLU J \J_ U) ITIIIIIIIM, Z LU LU L L JUj J< J 14 z � /Q z 1� w (w1� V (n z Q 1 LU W ( z o Ln 'Q H Q ~ i LU I� 0- w Z w w a ur) JOB NO. 182154 SCALE AS SHOWN SHEET NO. 27 / \ \ 77THREE(3) HEME FOR EVERY 400sf (OR 20'x20' SECTION) SHALL CONTAIN THE FOLLOWING: \ / IDE 50% OF THE BUFFER: \ / / \ 11 - 2" CALIPER CANOPY TREE OR LARGE EVERGREEN AT 6' "- 1}" CALIPER UNDERSTORY TREES OR EVERGREENS AT 4' OR ONE (1) UNDERSTORY TREE AND LARGE SHRUBS AT 3'-4' (3) SMALL SHRUBS OR WOODY GROUNDCOVER AT 15"-18"OF THE BUFFER: RD 50%OOT SEEDLINGS OR WHIPS AT 1,2010 STEMS/ACRE, APPROXIMATELY 6 O.C. (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) ✓ \ \ / \ / _-. 1�/� \ ' 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. .O O/ / 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 AS A TREE THAT MATURES TO A HEIGHT OF 12' TO 35'. A LARGE SHRUB IS DEFINED AS A SHRUB THAT REACHES 10' OF HEIGHT OR GREATER AT MATURITY, AND A SMALL SHRUB IS DEFINED AS A WOODY PLANT / \f THAT CAN REACH UP TO 10' OF HEIGHT AT MATURITY. STREAM BUFFER MITIGATION NOTES: THE EXISTING STREAM BUFFER ON 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: \ \ \ / / �Q \�- " h \ / 1. THE CONTRACTOR SHALL REMOVE THE EXISTING CONCRETE DAM IN POWELLS CREEK, AS 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 \ 0 // / \ - - - _ / \ CULVERT CROSSING). WITH THE REMOVAL OF THIS DAM THE NATIVE STREAM FLOW �� Lrl 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. /� , / � / '.--�¢�-�� i��.'j��. 2. THE CONTRACTOR SHALL ALSO PROVIDE STREAM BANK STABILIZATION WITH ARMORING TO 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 s IN AREAS ALONG POWELLS CREEK WHERE TREE COVER IS MORE SPARSE. MITIGATION / / PLANTINGS SHALL NOT BE REQUIRED TO EXCEED A TOTAL PLANTING AREA OF 44 175sf �� i i �' \ � � � i / � � \;, XI \\\ (EQUAL TO 1x THE PROPOSED IMPACTS) WHEN MITIGATION ITEMS #1 AND #2 ABOVE ARE / %� // / r ' �l �� " ! 1 4. TOMPLETED. �� MS #1, 2 AND 3 ABOVE WILL RESULT IN PLANTINGS THROUGHOUT THE POWELLS CREEK//� 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.11 ti I - - - SCOTT /R. 03-LLINS'Z No. 35791 y 11/6/20�� �yL9 PROPOSED TRIPLE BOX CULVERT P T (NOT PART OF THIS PLAN) AT %' / - _ \\\ - - POWELL CREEK CROSSING WITH THE z M lk,PROPOSED CONNECTOR ROAD co 00 04 pROPOSED IMPACTS - -- WPO BUFFER THE TING TMP 56A1-01-26co MP 56-115J FROM THE PROPOSED _ /-- 100, WPO CV ✓ PHASE II DEVELOPMENT ��- - ✓��'r '� / BUFFER, TYP! _ 00 �. , jEASANT GREEN04 PHASE II /1-1: J ` N J LIMITS OF POWELLS- CREEK,TYP:. \ % / PROPOSED IMPACTS� V �, / I V '� / ' �I T (44,175sf) TO THE W BUFFER(PARTOFPO \V �\s� \,, \ \J / I J CONNECTOR ROAD VSMP \ ps I,�u l J LAN - WP0201900027 ,-� C I i � L9F PROPOSED IMPACTS - -_' % (14,7295f TOTAL) TO THE - � � 1 TMP- 55C-03-A1 - / WPO BUFFER RESULTING ��� FROM THE PROPOSED W - - / f ������ �� _ OOP, / w PHASE II DEVELOPMENT I � � � / / COUNTY DEFINED PRESERVED i �/ / V i / \ / / f y -_ - �'STEEP PES TO RFMAdN (TYP:), V I /// y / l \ / \I S� �� / V /� �ii Lu TMP' 55C-03-A� ul u) EXISTING CONCRETE DAM PROPOSED TO BE REMOVED, GIVEN ITS CLOSE PRO'X2PTITY TO THE, / PROPERTY LIMITS, THE CONTRAC O"HALL v - / —WPO STREAM BUFFER / / � STAKE & CONFIRM THE PROPOSED \ \„v�� v i DEVELOPMENT's PROPERTY LIMITS & THE / EXISTING �DAM PRIOR TO CONSTRUCTION, CONSTTRUCTTON ACTIVITY ASSOCIATED WITH THE,; / V ,;;� 1 � � . -..� ,.__ � / �; / / � .^^\ / ui DAM REMOVAL SHALL BE LIMITED TO THE ONSITE `\ ( - /i i !v \ / O / J TAX MAP PARCELS 56-115�S5C-03-A.SY COUNTY DEFINED PRESERVED - STEEP SLOPES�IU REMAIN (TYP.) ` / - /� \ Q \ \ PROPOSED IMPACTS 9sf TOTAL TO THE 111��� WPO BUFFER RESULTINGn / O FROM THE PROPOSED EXISTING CONCRETE DAM \ 100 WPO -a - PHASE II DEVELOPMENT EXISTING 12' WIDE x 8 HIGH i BUFFER TYP. A PROPOSED TO BE REMOVED ( �� COUNTY DEFINED PRESERVED DOUBLE BOX CULVERT AT :. / LIMITS OF POWELLS STEEP SLOPES TO REMAIN (TYP.) -' POWELL CREEK CROSSING / - �� „o ,� - ' CREEK, TYP, � � / WITH EXISTING CLING LANE \ N \ P G SSC-I�3-B�fTMP 56-115 � �� ` � �ZNC' EP Q, V '�PROPE LIMITS I - u Lu o "' w 0- lu) JOB NO. 182154 SCALE 1" = 100' SHEET NO. 28