Loading...
HomeMy WebLinkAboutWPO202000053 Plan - Revision WPO VSMP 2020-12-10OWNER: 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'MINIMUM 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 VEGETA770N: 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 WI7H/N A FLOODPLA/N ZONE AS SHOWN ON FEMA MAP#51003CO229D, DATED FEBRUARY 4, 2005. RETAINING WALLS: RETAINING WALLS ARE PROPOSED UNDER A SEPARATE PLAN AND ARE SHOWN FOR INFORMATIONAL PURPOSES ONLY WITH THIS SET. LANDSCAPING: STREET TREES SHALL BE PROPOSED W/TH THE FINAL S17F PLAN ALONG THE NEIGHBORHOOD STREETS /N ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS SET FORTH IN SEC77ON 32.Z9 OF THE COUNTY CODE. TRASH: EACH LOT SHALL HAVE AN INDIVIDUAL TRASH CONTAINER. IMPERVIOUS AREAS: PHASE l 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 IMPERVIOUS AREAS 10,650 SF EMERGENCY ACCESS ROAD 11,575 SF TOTAL 198,395 SF (4.55 AC) PHASE ll PROPOSED ROADWAYS & SIDEWALKS 121,175 SF PROPOSED RESIDENCES 132,140 SF PROPOSED DRIVEWAYS 35,280 SF TOTAL 288,595 SF (6.63 AC) PHASE III FUTURE ROADWAYS & SIDEWALKS 14,650 SF PROPOSED RESIDENCES 67,925 SF TOTAL 82,575 SF (1.90 AC) STORMW47ER MANAGEMENT • A STORMWATER MANAGEMENT PLAN /S PROPOSED Wl774 THIS WPO PLAN TO TREAT PHASES /I & N OF THE PLEASANT GREEN DEVELOPMENT. TWO DRY DETENTION BASINS AND ONE UNDERGROUND DETENTION SYSTEM ARE PROPOSED TO MEET MINIMUM STORMW47ER QUANTITY REQUIREMENTS FOR PHASES ll AND Ill. THREE LEVEL SPREADERS ARE PROPOSED WITH THIS WPO PLAN TO MEET MINIMUM STORMWATER QUALITY REQUIREMENTS FOR PHASES II AND /I/. ALSO, A COMPREHENSIVE ANALYSIS OF THE ENTIRE PLEASANT GREEN DEVELOPMENT'S WATER QUALITY REMOVAL RA7ES WAS PROVIDED TO ENSURE A MINIMUM OF 75% OF THE REMOVAL RATES WERE TREATED ONSIT£. LAND DISTURBANCE. PHASE I LIMITS OF DISTURBANCE = 13.15 AC CONNECTOR ROAD LIMITS OF DISTURBANCE = 1.90 AC PHASE ll & N LIMITS OF DISTURBANCE = 16.99 AC OFFSITE EASEMENT. ALL PROPOSED GRADING SHALL BE CONSTRUCTED ON SITE OR MTH/N EX/STING RIGHT-OF-WAY. NO OFFSITE EASEMENTS ARE PROPOSED WITH THIS DEVELOPMENT. NOTES 1) THIS PROPERTY DOES NOT LIE WITHIN AN AGRICULTURAL AND/OR FOREST DISTRICT. 2) ONLY (1) DWELLING PER LOT SHALL BE PERMITTED. 3) ALL PROPOSED EASEMENTS SHALL BE DEDICATED TO PUBLIC USE. 4) STREET TREES SHALL BE PROVIDED ALONG ALL THE PUBLIC STREETS 40' O.C. IN ACCORDANCE WITH VDOT AND ALBEMARLE COUNTY STANDARDS 5) THIS PROPERTY IS NOT LOCATED WITHIN A DAM INUNDATION ZONE. 0 PLEASANT GREEN PHASE II VSMP PLAN WP0202000053 WHITEHALL DISTRICT ALBEMARLE COUNTY, VIRGINIA 1 ❑ G \ ) 'i !I L?� \ ❑ - 1,.\ 1 I � AUV - � \ v 1 ❑ \❑�1 to ___ \ I 1 0 ❑ 1 1 \ \ \ - 11 1 �1`\❑\ ` ,1\` Q I I ❑\, ❑'\ \ 1 ❑ \ \❑ ` — ❑ \ \ __RATER AD AVE....-....... � _.... EXISTING RAILROAD - , \ 1 ❑ 1 - Y FUTURE ` ❑' 3 �, \ ❑' \� 1 PHASE III : ❑ \ PHASE I 1 V FUTURE �❑� i - �\XY iI PHASE III ❑,,--- ' \ ,z f - \ pr;VATE ALL- 1 Cam\\ 1 - ❑ —� � ^� PHASE II t a Pf,ASE II I I i I ( \ i �,� \\ i�`r �; � I ❑ �'� I�I❑1\ � \ ��❑\�1 � I � � /�/ � t' `F� PHASE r J — L - i i O Eli❑ I ! I i , 00 ' i i \ z - CH TREE DRIVE � \ \ ORCHARD DRIVE �� --- `�--- I ❑❑, moo. QQ— I ; ` I I i SHEET LAYOUT SCALE: 1" = 150' LEGEND EROSION CONTROL PLANWETR/CS SA SAFETY FENCE 301 OP OUTLET PROTECTION 31B EDGE OF PAVEMENT CURB 200 � PROPOSED CONTOUR SEDIMENT TRAP OR BASIN ❑CRS CONSTRUCTION ROAD STABIL/ZA77ON 3.03 RR R/PRAP 3.19 SOIL BOUNDARY BUILDING DRAINAGE DIVIDE 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, O O- RIGHT-OF-WAY DIVERSION TREE .PROTECTION OD 8 RWD TEMPORARY DIVERSION DIKE TEMPORARY RIGHT-OF-WAY DIVERSION 3.09 3 11 TP DC TREE PRESERVA77ON AND PROTEC110N DUST CONTROL 338 3.39 ® VARIES WITH SHEET DRAINAGE PIPE BENCH MARK VDOT STANDARD STOP SIGN o o o- -C-X-X- -X-X- _ SAFETY FENCE SILT FENCE PROPERTY LINE ST SB TEMPORARY SEDIMENT TRAP SEDIMENT BASIN 313 3.14 # VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER � PROPOSED HANDICAP PARKING SPACE STRIPING INLET PROTECTION 00 O O O O O PROPOSED CONCRETE 100 YR. FLOODPLAIN RIPRAP, OUTLET PROTECTION OR CONSTRUCTION ROAD - - - EXISTING CONTOUR STABILIZATION O VICINITY MAP �} SCALE: 1" = 2000' :-' LAUREL HI L L S CROZET ,a-n CROSSING GRAYROCK pa WAYLANDS ° 1�lAYLAND PART. GRANT ,zob SITE Starr H(II Bre', Crozet 24' REA PARKSIDE I � VILLAGE cards Q Old Trail Golf Club 9 I204 PARK VIEW �'. BROOKWO Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS & DEMOLITION PLAN 3 EXISTING CONDITIONS & DEMOLITION PLAN 4 OVERALL SITE LIMITS OF DISTURBANCE AREA 5 EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS 6 PHASE I EROSION & SEDIMENT CONTROL PLAN 7 PHASE I EROSION & SEDIMENT CONTROL PLAN 8 PHASES II EROSION & SEDIMENT CONTROL PLAN 9 PHASES II EROSION & SEDIMENT CONTROL PLAN 10 PHASES III EROSION & SEDIMENT CONTROL PLAN 11 PHASES III EROSION & SEDIMENT CONTROL PLAN 12 EROSION & SEDIMENT CONTROL PLAN DETAILS 13 EROSION & SEDIMENT CONTROL PLAN DETAILS 14 PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN (WATER QUANTITY) 15 POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN (WATER QUANTITY) 16 STORMWATER MANAGEMENT PLAN (WATER QUALITY) 17 STORMWATER MANAGEMENT DETAILS 18 STORMWATER MANAGEMENT DETAILS 19 UNDERGROUND DETENTION SYSTEM STANDARD NOTES & DETAILS 20 MITIGATION PLAN 20 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. LLINS' No. 35791 "Ll 12/9/20 4i Z z o Ot U m w � J z O F Lo z LU .. ce 0 W N H rn ry y W N O N W N > Z LU J J_ L9LU F— F- 0 Z 01� < C) LU WY - AM z pJp� LL G H� LU V/ Q w 2 O I U LU LU / rLL `V LU z J 0L U w ru 0 w a Ln 30B NO. 182154 SCALE AS SHOWN 1 LL� 1 L - - - - - - _ _ EXISTING RAILROAD CONNECTION TO PUBLIC STREET PROPOSED UNDER, . IIIIIIIIIIIIIIIII IIIIIII IIII IlillrllTTYH-#+LLI IIIIIIIIIIIII III IIIIII IIIIIIIIII IIIIIIIII!1111111 IIIII " 'I IIIIIII IIIIII II II IIIIIIIIIIIII IIIII II II II II III i { _--T._--_T _.._ } 1 T FIRE HYDRANT PROPOSED UNDER PLEASANT GREEN�1GRADING PROPOSED WITH PLEASANT GREEN I I III I 1 1 I 'PLEASANT GREEN PHASE I ROAD &UTILITY PLAN -SUB-zoig-0007i - -- -- - - -- -- - - i — - BLOW -OFF PROPOSED UNDER PLEASANT GREEN PHASE I ROAD & UTILITY PLANS SUB-2 PLEASANT PHASE I ROAD & UTILITY PLAN - SUB-z0ig-0007i - - ---- ' PHASE I ROAD & UTILITY PLANS SUB-2019-00071 TIE-IN TO EXISTING 8" WATERLINE PROPOSED WITH PLEASANT ISTAr - EXISTING RWSA 12" DI WATERLINE EXISTING RWSA12" DI WATERLINE GREEN PHASE I ROAD &UTILITY PLAN -SUB-zoi 000 i NT, 0I r - - ,RAIL ROA 1 9 7 D MCCOMB STREET ROAD CONSTRUCTION _ _ w -- •, - „ - w - w w w - _ PROPOSED UNDER PLEASANT GREEN __r. _ - - — - - - - EN / 1 �- - - w—�" J � �' - - — - - - - — - -= - __ ,� --- '.'.. - '-'� � ---- - - - ! - - 71 � _ _ - - - - ---------- 54 _ — PHASE I ROAD & UTILITY PLANS SUB 2019 000 - -'� 55 r OPD _ - - - - - - ,.: Da p�Bt1 A -- EXISTING BARN TO BE R _ - - - Esr �:. GE Cy PC EMEN't . ' � � a, ,:. __ 4, a� a ft -`--' r P_CE55EPP i9/ - - _ - q� J RENOVATED FOR USE BY -'` EASEMENT E 4o g ss41 - ' THE NEIGHBORHOOD / \ zo' PUBLIC DRAINAGEEA NT - - - - - --` - _ G2i 'a , •D.B. 5z6y, PG. z97 O EXISTING HOUSE TO BE I f ' `..?,<CONVERTEDTOACLUBHOUSE `.....,. \.' i .�-'�/ �.. �. SSA L57; \ � ,. " v � ' , � FIRE HYDRA PROPOSED UNDER PLEASANT GREEN ' _ C23 -_ % <' PHASE I ROAD &UTILITY PLANS SUB-2019-00071 360 1Cg M'"; y ^w vvY Yam` r STORM SEWER PROPOSED WITH Q� ` / PLEASANT GREEN PHAIF I ROAD' \ F -` {:. \ \ \ , �K ✓ 6 1 1 0R PL pTi zo' WIDE PAVED EMERGENCY ACCESS ROAD & UTILITY PLAN - SUB-26R)-0007i f,,, r _, -; >' - ,. ' 8" DI WATERLINE PROPOSED UNDER PLEASANT GREEN MP c )11 32 P 6 1pL PROPOSED WITH THE PLEASANT GREEN PHASE I - - - /-•; \� - ' PHASE I /:.� 'PHASE I ROAD & UTILITY PLANS SUB-2019-00071 5CH Stu 01 - _ ROAD & UTILITY PLAN - SUB-zoig-0007i PE 36 PO DB TO BE REMOVED WITH PHASE II AND t O i v i i A �05 b� 0 3h1 0�1N0' REPLACED WITH MCCOMB STREET 0 % '`" s - "R 265 P j EXTENSION i � I ,, '` � / q yv``, ` ry v ✓ i � � GRADING PROPOSED WITH PLEASANT GREEN � L '! �- - L68 �zoUN!AGE EASEMENT � PHASE I ROAD / &UUTILITY PLAN - SUB-z of9- 0007i DB5z6y, PG.297 �zo'UTILITY EASEMENT D.B.5z6y, PG. zg7BLICD RAI T 56A1-i i _A- 6" SDR26 PVC SANITARY SEWER LATERAL N/F IL V M ! e rd ,� PROPOSED WITH PLEASAN GREEN PHASE I DB 5 034 `; '~r __ l '� � DB 1411 PC 367 PLA / w 8" DI WATERLINE PROPOSED UNDER PLEASANT GREEN', - - 1� ROAD & UTILITY PLAN -SUB-zoig-000 i _ \ - - - - y ZONING: R6 � / 1 " - PHASE) ROAD &"UTILITY PLANS SUB-2019-00071 No. 35791 a 12/9/20 Z ONAL 'O� CE TO NEAREST INTERSECTION BLUE RIDGE AND JARMAN'S GAP i 0' I LIN DIWATERILI❑NE EXISTINGACSA8' Li A EXISTING RWSA 12" DI WATERLINE � a- m Z Z O J Q m U m , w O Ln J Q Z U) (A Z LU LLI Of STANLEY MARTIN COMPANIES LLC f / TMP 056A1-Ot-OO-02500 PHASE III / STORM SEWER PROPOSED WITH ` $ I, ✓ _ Y 1.8500 ac. PLEASANT GREEN PHASE I ROA "a p --:--'�,.,� / ` // /. TMP 6 -35 y�EXISTING CUL-DE-SAC o , C3 /:i'� DB 5226, PG 309 _ I &UTILITY PLAN - SUB-zoi 000 i �� --- - ® a i _ - N F RITZE ,MISTY DARNEL- r TO BE REMOVED WITH ,. = / a Y c' ) / \ y � PHASE II CONSTRUCTION � ' 'h" - -, STORY FRAME i 0 ' ' (� � 2 PG 12 �ON CRAWL/ --- ��O ---- /// s ^ zo PUBLIC DRAINAGE EASEMENT 576 PC 3 PLAT) _;I .PARTIAL CELLAR C`'-.. D.B. 5264, PG. 297 - DB i TMP 56A1 -1- R6 EXISTING SANITARY SEWER - C2 N/F PIR Y, H L. TO BE REMOVED AND EXISTING . - " , -,? - ' �N ` \ PHASE LME (TYR.) 20' PRIVATE DRAINAGE EASEMENT \ �.,, \ - - OR T SA F. - EASEMENTTO BE VACATED DO 3; 5 4, 97 a -= STANLEY MARTIN COMPANIES LLC v C D.B. 26 PG.z" gM #Z 2143 PC � = TMP 056A1-01-00-02900 � PLEOASANTGRE NPPOOSE WIIAD- - ` TOP O MH=72 .53 D PC 23 (PLAT) 13.49 ac. _ - C _ \ II, ZOT�LNG: 6 DB 5226, PG 309 s"' &UTILITY PLAN -SUB-zoig-0007i F �-3 - y� PHASE II v _ zo' UTILITY EASEMENT / r:1,' ' D.B. 5264,297 EXISTING HOUSE - ,''RIB :-(� /-J_. i _ _ _ p, ✓ _ {1\ \ \ Y_ \ �. _ �}', -1 - _ _ y --- PRIVATE _ µ ALLE �`J 56A1-1-33A PHASE 11 CONSTRUCTION a d \ N F BA ER, JAMES L. OR i TO REMAIN DURING `bh GRADING PROPOSED WITH PLEASANT GREEN6 v m_ - '' 1 - D LORES J. ' ' r V1 6. g T / PHASE I ROAD &UTILITY PLAN -SUB-zoig-0007i- - C?' " ` _' ` - _ - 1 F,. - y, „fir s_>�1�h_ V" "90 PC 389 1� �, �'� ,'/- ■ nr �C2y �o C28 3.. ;.-----�__ CZ9 - -- - . _. --- - .i ,y.� zo'PRIVATEDRAINAGEEASEMENT) >-I+ �`,..... g _!� -� DB 19Z PC 534 (PLAT) t - -- -- - T I I 20' UTILITY EASEMENT D.B. z6 PG. z TOP OF P'-72 .85 ZONING: R2 i i6 L DUPREE STREET ROAD CONS RUCT ON !97 _ - - ,�- v 5264 , �- r -� ` TM G6t11 -33 � y i / / ■ � � / � I �- -- - - � - PROPOSED UNDER PLEASANT GREE D.B.PG. z 5 4� 97 I I � v' _ / . - I PHASE I I -- --- _ -. 'cam-f r PHASE 1 ROAD &UTILITY PLANS SUB-2019-00071 /FIRE HYDRANT PROPOSED POSED UNDER PLEASANT GREEN r'., -„- , �.. V ,.' STANLEY MARTIN COMPANIES LLC / \. �-. -(• r •, a r >, ANC �A[i TMP 055C0-03-00-000AO732 4 " - - PHASE I ROAD & UTILITY PLANS SUB-2019-00071 T -..- ,� R ' ). -- --- -T 65:-, T- C� �, I 1 --- _'„W i - t DB 2413 214 E E �MP 5A.�1 32 16.28 ac. / I , - , - . - - _: (,''� - - r' , "'r�j'�i` - - - ?. I , B 1980 PC 53 (PLFl N/F BAKER, JAMES L. LU ■ - - - - - _ DB 5226, PG 309 ,' '. �� I -- ... , _ ., '' . , T, ti 1� : I F: ``" `� ZONING: R. O \ Z ■ m _ _ _ - -- _ _ _ _ _ v / / v\ I �� \ > -- - -- - 6 DI WATERLINE PROPOSED UNDER PLEASANT GREEN r r' �. - / ^� 11 D 5 PC 474 _ _ F „ / S J F t PHASE ROAD & UTILITY PLANS SUB 2019 00071 �� % of I: GRADING PROPOSED WITH DB 12 PC 397 PLAT -w ` ` `' r,_ -- - - . �, , , \ �/ /� '. I. - - - - - _ PLEASANT GREEN PHASE I ROAD �Z NING. 6 \ LU _ _ EXISTING ioo'WPO -- / / .,-\ I r STANLEY MARTIN COMPANIES LLC r.ar. U = STREAM BUFFER / / iLIMITSOFPHASEI /, \ _ — - �/ \\\�\& UTILITY PLAN - SUB-2oi 000 i/ TMP 056A7-01-00-02600 " a,y - T�j , ; , ,' ,' ^ r �.t = A 9- 7 TMP 56A1-1-328 _- -Q ■ T.. v, ■ W FROM STREAM BANKS, CONTIGUOUS \' I '`� , 4.744 ac. ;. % ,, J �� a°�, ,' ° r r� "� � � � N/F BAKER, JAMES L. J- 1J WETLAND AREAS AND i0 FLOODPLAIN ' ` ` DB 5226, PG 309 - , R ; , / z� ILITY EASEMENT % ALSTON STREET ROAD CONSTRUCTION _ - / - - )-. - J r ,,, OR DELORES J. i -FIRE HYDRANT PROPOSED UNDER PLEASANT GREEN (5) C „4& /' p g 5z6y PG z97 T 3 PROPOSED UNDER PLEASANT GREEN DB 1222 PC 394 PHASE I ROAD & UTILITY PLANS SUB-2019-00071 `' i \ PHASE I ROAD & UTILITY PLANS SUB-2019-00071 (397 PLAT) \,' ,' ,: ��♦ _,1p Q>• i _ �i� "..7� a� R6 `- _ _ -� - --- - - - I i STORM SEWER PROPOSED WITH \ - BLOW -OFF PROPOSED UNDER PLEASANT GREEN / / _, \ - - - - � y � � TMP Al 1 32A - -� - PHASE I ROAD R UTILITY PLANS SUB-2019-00071 �PLEASANT GREEN PHASE I ROAD � / I N/F Z21 �, � i &UTILITY PLAN -SUB-zoig-0007i ) DB 21 4 PC 658 � DB 250 2 LAT) i PHASE II PROPOSED \ �{ , / ' . 8" DI WATERLINE PROPOSED UNDER PLEASANT GREEN _ ----" ROADWAY EXTENSION AN ZONI C: 6 -- _ —_, - - _ �PHASE I ' R PLANS SUB-2019-00071 '--T - — - '' / �) ' `\\ �\.., i ° $�` \ f � � 1% - ROAD &UTILITY PLA - -1-- ---- ,-- CO 5 A-1-z6 CZ \ y Yn ti ��- CONNECTION 6 8' DI WATERLI PROPOSED UNDER PLEASANT GREEN PHASE I CAD & UTILITY PLANS SUB-2019-00071- e. o' U I ILI I T EASEMENT 1 D.B. 5264, PG. 297 ,✓ ° _ r l F V _ - `'I STORM SEWER PROPOSED WITH EXISTING STREAM - - / _ X ` to LEASANTGREEN PHASE I ROADS X = -- PHASEGRADI ROAD & UTILITY ITHN -SUB zoig-000 i '^� C & UT UB-2019-00073 ;_ 1/ / - ---� JI 7 - / --- ---- ILITY PLAN S VDOT STANDARD ROUNDABOUT PROPOSED �' ' (- zo' PUBLIC DRAINAGE EASEMENT WITH THE PLEASANT GREEN PHASE I ROAD s ^. C�D.B. 5264, PG. 297 _ %_ P 56-115 & UTILITY PLAN - SUB-2019-00071 _ 1 �I is r F EALTY DO 4 \-t2C) _ ZONING: \ XISTING iod - -- y. EXIST NG ST \ zg ST AM BUFFER TO 6 ��8 6gN - ---NFWEREALTP� �- `.. ---- -..,- -.\ � - �J ! \ \\. •-� / -- REAM �� \ _ - PARTNERS„LlE. \ ANIT P \\ -- --------- BIO- DB 4856 PG.582- - _ A PHASE 1 R PROPOSED &OUTEDITY PLANS-SUBA2019-00071, I PHASE PROPOSED WITH 19-000 PLEASANT GREEN -- �\\ --- --ZONING �6' 1--" v-�--- \ �\�, PHASEIVSMPPLAN-WPO-zolg-00003 S - ------ , ! SWM EASEMENT ---- �� A -.D.B. 5264, PG. 2-97 00 V® I � ®�n � - - " - I C, _---------- _ _ - --- - *� � � I \ a PROPOSED (UNDER SEPkRTE SET OF ' r `• �` � I � 1 z4 L�3 i2 - I �I � A� � � STANAY M6A1n 01C OOP Ob0A0�C PLANS) ioo-YEAR FLOODPLAIN LIMITS \ i PER HEC-RAS ANALYSIS PERFORMED BY ®� 50 as ��� \ COLLINS ENGINEERING IN APRIL 2029, TYP.- � � DB 5p� ®®® � - �' ®tea EXISTING ioo-YEAR FLOODPLAIN LIMITS \RAMBLIN BROOK LANE CONSTRUCTION ' � ' -® ® ER HEC-RAS ANALYSIS PERFORMED BY PROPO ED UNDER PLEASANT GREE 5 I \ -=®c®® COLLINS ENGINEERING IN APRIL zoig, TYR CONNECTOR NS -SUB-2019-00058 GRADING PROPD UND R PLEASANT GREEN - - - - / CONNECTOR RMAD P NS -SUB-2019-00058 O- - - 7 ® ,------ ����� a_ r d �0®' - --- - -_-- - -- -_ ''� \ , -- - -- — F N rn � N L9 M .� CIO z N M Q qT J WN z N a N �! Q z > > O 55/lr LU - J H� J U) LU 0 L9Li 2 F-- U) w O Q 0<� in. W U O W Y z LLI LU 0 LU z Ul - U) DC 0 F_CD u zLU W z Z' Q Ln J v)w L.LLU < 0 O O N U w a In JOB NO. 182154 SCALE III = 601 SHEET NO. 2 LineTable Curve Table ADJACENT PROPERTY OWNERS INFORMATION --- - _ ', -' I ' --- Line# Length Direction Line# Length Direction Curve# Length Radius Delta 1 _ i - \ \ TAX MAP PARCEL `- - _ � , vv � -' _ - � vv / TH NUMBER OWNER ZONING ACREAGE D.B./PG. ---=�` -- -- _ - ___ A - _ ���j 28 Lx n57.777 N25o26'ay.57'E L37 8776o s e°a3zz.8g'W cx 35a.z77 xx8.000 088.526x A 56A1-05-00-000A0 STANLEY MARTIN COMPANIES, LLC R-6 4.24AC 5226 309 v----"-- _ II 1 �, __�r.------___ ��1 Li 5 3 5 4 9 _ 3 s B 56A1-01-00-030A0 STANLEY MARTIN COMPANIES, LLC R-6 O.50AC 5226/309 / L3 30.oao 564°333543"E L;8 Bz. 33 Sal°04'o3 a5"E C3. a997a az. 0o o9a.54o8 I - - - _ SOT N_ / 1 SCOTT R LI S Ly 27002 Sz8°38 o6 67'W L39 105.230 S54'4i 3736"W C4 42052 200500 012.0170 C 05600-00-OD-11500 VUE REALTY PARTNERS LLC R-6 21.85 AC 4856/582 / _ 1 - \ _- - k\" - U No. 35791 L5 27.031 N58°z9.a4.g8"E Ly0 i6o.000 N65z4'096yW C5 xa5.685 3o8.500 04z.iB86 D 055CO-03-00-000BO CROZET CROSSING COMMUNITY R-6 4.18AC 2228/122 / -1,_ I \--.____---------{------- 1 - ------_______-_-__- o. 979 20 L6 49000 N75°231148E Loa So:16o N68°59'0264"W C6 13.883 333500 002.3951 E 055CG-03-00-01700 MORGAN,TERESA R-6 0.28AC 1407/560 l D ; ,/- -✓ I \ I _--"-- - 1 - - - \ - 0 / / L7 5.790 N14'36'48.52"W L42 256.839 N63°20'20.64"W C7 a5,aa9 23.500 036.8852 F 055CO-03-00-01800 GUYTON,JASON RYON R-6 0.28AC 4002/047 ,\ -' \ \ - - - - - - \ 'S9IONAL E�yG L8 9.773 No6°3a'02.28"W L43 52,00i N63°20' 20.64"W C8 233a45 250.500 030-4995 G 055CO-03-00-01900 RICHARSON, ELLEN M OR ROBERT M R-6 0.27AC 3472/007 L9 59.236 N04o54'3911"W L44 3345 N67o43'21.58"W C9 50.043 524500 005.4667 H 055CO-03-00-02000 SALISBURY, BONNIE L R-6 0.27AC 1444/206-------- 055CO-03-00-02100 RASCLE, SERGE OR PENNY CHANG R-6 0.30AC 3392/158 Lio ig.8o5 N25°29'25.8°'E L45 x8a.4B3 N610 4� 378i'W CIO 27.510 12.5oo 080.2608 Lu z6.426 N25°29'25.8a"E L46 50.020 N58°56'39.64'W Caa 3a.864 225.500 oa8.o962 J 055CO-03-00-02200 CROMER, SHIRLEY H R-6 0.29AC 1337/295 K 055CO-03-00-02300 GREENLEE, CLYDE V OR CARRIE L R-6 0.30AC 1352/322 - Lu 77.486 SSz° 23' S903''E L47 226.800 N54° 53' 37.84''W Cu a3.6ax 485.5°0 °0a.6o64 L 055C0-03-00-02400 MARSHALL _ _ NANCYHORREBECCAE R-6 0.27AC 4388 295 , _- - - - - -- - N 055CO-03-00-02600 WOODSON RUSSELLWILLIAM R-6 0.29AC 3488513 La3 y3.g0 S38 38'26.o3"E L48 a¢9.985 S38°38'4436"W Ca3 36.238 47.5°0 °437-7 M Ossc0-03-oo-ozsoo BRADLEY BONNIE LEE R-6 0.27AC 1383/377 Lay 29:440 San oa 07:0;"E Lyg zo.667 Ny9°555o,6i'W Czy 39n88 57.500 0390488 O OSSCO-03-00-02700 TRACKER DAMES E OR BERNICE E R-6 0.24AC 1870 1s3 - ----- O Las 13.810 5u° ox o7:a3'E Lya 50.on Syz° 5i y7.u'W CzS. u338 4750a 0257385 / L16 42.980 Saao 5i i7.o3"E Lg 151.783 S38° 00' 5830"W CIS 51•576 482.500 oo6.1L245 P 055C0-03-00-02800 LEWIS, RVA A R-6 0.22 AC 1330/202 La7 89.730 S38°3T40:97"W LSa 21.412 N45°25'44.29"E Ca7 8.232 64.500 005.5819 Q 055CO-03-00-02900 VON N, MICHAEL E R-6 0.22AC 5023/422--- Lab 38.520 S0z°33z9.o3'E L53 1723o° N45°09'5223"W C¢8 57.756 722"500 004.5802 R 055CO-03-00-03000 LUECKE, ROBIN J R-6 10.31AC 3612/210 r ' �RAILROAo _ - �- -C2o-_- s 5 S BUCKINGHAM BRANCH RAILROAD Lz9 9.990 Sa8°azz5.o3"E L54 zoo.000 N43°29'52.23"W C19 46991 a47a.00 00a.8z8 Lzo 51.209 Sa8°aa 25.0g"E L55 203.3oo N42°56'52.23'W C20 287.432 3822.470 004.3197 1I - - - - ,' ZO I pVE � ,� - _ _ , J Lza 109.956 S29°4605.78"E L56 52.440 Nx5°59'a477'E Cza 6845a 172"000 022:8020 \ -\ Rp\IRO�u. .izs - -_--" -- TI❑ a Lzz 34.249 S290 46'05.78"E L57 72833 N44°z5 z6.84�W Caz 67795 228.000 027.0367 \ - _ - 1 / / - _ I / / I 1 /,- CIO Lza 36.467 S4z°32loz.z5'E L58 z3353 S3°°55'zz.°y"W Ca3 a55.o8g 7zz.000 0ax.307y \ - / - _ \ / O Lzo 49-073 Si3°a0'54 59"E L59 aa3.597 S8a°08'az.08"W Cz4 a4.536 z3:500 035�4403 {\\,✓��\� \\ �' ' `. / / V v - - \ w , / �i Lz5 73.a7i Say°55'0a.93'E L6o 7.87z N za' 6. a"E Cx z8 .aaz 223500. 0 0.za / r, I - 'rA W (n / O � / V/ z 77° 5 4 5 7 5 39 / / I I _ - / / J) z L26 i36 ogo S26° o7 5o a5 E 1-61 102.434 S47° 35' 53 8a'E C26 20.440 '23.500 0498345 \ '.` - / / / = ' _ _ _ - '� _ _ _ _ _ _ _ _ _ _ 1 � I 11 I O - _ - _ _ _. _ - _ / /- � W / L27 a75aoo S46°33'?Ba5"E L62 8"083 512°24o6.agW Czz 72.a58 275.500 oa5.00fi8 ..� \\ .� /< ,-'-- '� -"-- - i � \ / 1 / - " L28 245470 S56°32'34 15"E L63 a3389 S47°35'S3.8z"E C28 34.510 268:5o0 007.3642 .. '/ / / �%_ i �- ` // \ � '•. � I 1 / �"y / i - I CC L29 97.000 N57° 40 53.85'E Ley 9.819 547° 35' 55.67'E C29. 244384 424505 0329848 ' � - _ / ✓ , �I I I - - - - Lao 81.000 S71°16' a.a "E L65 a5. Sa 3 4 5 54' 4� 5' 79� 4" 3 5 9 3 5009,0900 4 5 374 4°36'48.5z"E C3o a4.oz9 a3.5oa 0;4�zo46 / L i z 0.000 S z° g z ' E L66 z 000. S86° oz' z o E C z a xr86° 6 . 00 Liz 169.000 S42°303o.i5"E L67 105,428 N25°59'24.77"E C32 32:624 23.500 0795415 _ - - _ y � / A 1 L33 296.000 S45° 45' a8.i5"E L68 259.000 S51° 04' 52.23"E C33 4875 333500 000.8376 J L x 000 S 8.z 'E L6 z6.o N 'E C z80. 6 06. 0a 0337919 - 34 3537° 33' 3 5 9 5 79 45° 55' S5�49' 34 7 7 3 5 L35 87.530 582°22'14.a5"E L7o 193.682 560°24'27.57"W / _ _ / _ f 49 EXISTING CUL-DE-SAC - / � _TO BE REMOVED WITH / -A- 0 0 -t PHASE II CONSTRUCTION ) a EXISTING SANITARY SEWER ' - �' / \\ / ✓ I�_ / TO BE REMOVED AND EXISTING N EASEMENTTOBEVACATED O OPHASE 11 - -- , D O / L 1 - y s H --- --- �c M / / / s s� / ■ EXISTING MANAGEDLL SLOPES (TYPICAL) ' s / N LLJ En FROM STREAM BAt - _ STANLEYMARTIN COMPANIES LLC // I' ��X// _ Q �Lu ' / --- - - -- -- -- " - AREAS A TMP 055 O-03-00-000AO / /I F'� ,' ,' / ' �/ �� ' ' -_� tN -'''s. W - _ , _ ---- DB 5226, PO 309 > - _ LU / < EXISTING SANITARY SEWER _---- \ `� / / EXISTING FENCE ate' / �,' ' _ ✓ e -J /\ AND EASEMENTTO REMAIN %�G ���� TO BE REMOVED '- �<+�.. - .". J - - ---- - - '� / x' , / - _ - - - yea O -L9 EXISTING ioo WPO- \ STREAM BUFFER = - / / - - '' _c_; -___- o Q FROM STREAM BANKS, CONTIGUOUS / - - -' ,max WETLAND AREAS AND3.00'FLOODPLAIN ----- v� i , W EXISTING YEAR FLOODPLAIN LIMITS ' Aa ,Lij _COLLINSENGINEERING IN APRIL z - - " - - g E ioo 1 i , ER HEC RAS ANALYSIS PERFORMED BY ,' Uj �s�-- / COL g, --" _ - _ --- / - - I of TYP r,' ` � I; - ~ w EXISTING COUNTY DEFINIED PRESERVED- - -- STEEP SLOPES TO RE MAIN TYP) / -- Ul LLI LU- - - _ V i l YI EXISTING AM �� - ,�', �� -7N- - �� 34 - - - 3 X h------ - -- - -- - _-- ` W - - - L - - ---- - -- -- W - -- _ Uj t _ - --- ---------------- - -- -- - - _ O `I r _ LD 0LU S r JOB NO. I 182154 SCALE I I I o I I I ,� � III 60' ❑I 1 4 I I ! I I \ SHEET N0. 3 I - ❑ ❑r - - - -- No.R35791I , -- LY 1 ;` \ ❑ \ I --- � -- _------- - -- ---- - �~_`----- --- , ZONAL E - , --- _- ___-- — -\ - -❑ 1 1 PROJECT BOUNDARY I \ 1\ \- - ,- PRO 0 D LIM OF - Ll RBA \ 16.99 AC) - -_�----- ----;- ---' _. -'., ,T,-, - - - r,,; -.., _ _ -I �� F�( NQR-IU A II+IIL.I L.I L.I II I II II II I+IIII II+II II II I+I H++-+H-+H++Ii-I--H-+++H-"*- i -V A A ._ ❑❑ ; -rrH+++H lll+H+I I+I ++H I-+T119T„+ r+nTI-H-H-H-I IiH+I+I I+++H--1=H-H--FHm,,, rrnTrt�+H-H++I I+++I+I I++H++I I I H hTri,,,, rrT ++++ ,��,�,� I�-IT}Ir R� I� I I I I I I I I I I I I ++ , u o �- Z ❑ _ o Io F- LJ \� w i \ Lu - _-- - ❑❑STANLEY MARTIN COMPANIES LLC PHAS ossAl-ol-oo-ozsooE III \ \ i .,, _ '��� •, � + r .,, , : I _ PHA - -' SE LINE 0 DB 5226PG 309 0 � \ / ❑ " % ' G1\P1GR'"� ❑ \ \;' PHASE II STANLEY MARTIN%<y< xj , PHASE I O t� ° <' COMPANIES LLC • " --' "\ ' \, ❑. ��❑ _ i./f TMP 056A1-01-00-02900 .� \ i❑ \ /i' ,., — —.� \ �� PROJECT \ *--- 13.49 ac f' �_ s� ,' „� ".�r yii DB 5226. PG 309 —__ VATE <� \ BOUNDARY ❑ �- �y L p (/\/vh, 1 _ LEASANTG0-1 REEN \ Q i PHASE II &III \. ❑ - i MIT DISTURBANCE / PNL \I o ,�- 'PROPOSED, , -r - i LIMITS CE \`'�, � M\ /� � w ry _ DI' TURBANCE (16.99 AC) = ' (16.99 AC) I PHASE 11 1 �h - RE Q rn i i . - � ` ,ry ` / �� ,_ x .,•- --- - �-, x PLEASANT GREEN � � ❑ i .� I STANLEY MARTIN Q. i A '>- > I _-- STANLEY MARTIN - � - �. - `---- _ COMPANIES LLC A y - --- COMPANIES LLC y.� x _ _. - PH SEI -'� - - TMP 055C0 03 00 OOOAO - - - TMP OS6A1-01-00-02600 WP0201900003 - �� . _ ----_ .-- "-_ 16.2E ac. �/ �� ''�.� - I DB 5226. PG 309 MITDISTURB _ n OF •, , ... DB 5226, PG 309 �' ,r - __�- -� i-�--�-��- - LIMITS C _ 3 v < " r __ — J" co _ e / — —_ r PHASE LINE It x t. _ PROPOSED LIMITS OF I ^ - - - w \ o- DISTURBANCE (16.99 AC) - x N 1..� Q ° , PROJECTLu > BOUNDARY Ld \J , _• r �1 PROJECT /62 z. \ � m " ❑ — - - y _- i BOUNDARY ❑ ST*LEY MARTIN _ °O°a°°°e°°°oa� - - ❑ — O� 1 ❑. - \ \ I COMPANIES LLC } - aui TMP 056A1 O 00 030AO I� D a �7 w ❑ I I I `',fi— - / ;4� •\ DB 5226,G"�q� V °O P PLEASANT -- - - — I I � I � __�_ ,, O , �' -"� ��• v �;�_ GREEN. - J �� _.❑,_�-- r O x \ o CONNECTOR / -` - -- -- LL I ❑ / �� .I- ROAD z Q T i wlPis12019000z] ' d I - ___ �• - 2 v �— ❑J - f - �o° — - 99 (3.32 AC)Lu -- I PEACH TREE -- I ❑ - ��` � � � � - � - _ _�, �_ V V - (� W ❑ — _ -- - I _ ul ORCHARD DRIVE / a - - `� - w 'j❑ % w Lj • , r -- PLEASANT �------------�J __-----------__---W ----------- ❑\ � � GREEN ti '\ � /� — — — ❑ I L I Q O CONNECTOR \ O < J W V/ ❑ \ROAD ❑ O W z W LIMITS OF ❑— — I — — — — — \ \ ` DISTURBANCECN / J ❑ ❑❑ \ ❑� o ❑ -❑--- I \ \ ----- ❑ � � \ \ � � - Pei- ,/ \ r r I � w I I I �' \❑ \ i" \P w I A ❑ \ \ �' �P .r /' x I � a U'l JOB NO. IS E I a \ /' \ 182154 i ,00 so , o zoo I I oo� li ❑ EJ ❑ \ / \ O 11 SCALE r fI r r IN G I I " SHEET NO. ET 0 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 ADDITIONAL 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 TEMPORARY STABILIZATION OFF ACCESS ROADS SUBDIVISION ROADS PARKING THE 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. 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 EGETAT/ON IMMED/ATELY FOLLOWING GRADING OF THOSE AREAS. FAST GERMINATING V 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. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DES/WASTED BORROW AREA. L THE RAILROAD TRACKS/PROPERTY AND THE EXIS77NG ONSITE STRUCTURES PROPOSED TO REMAIN WITH PHASE H DEVELOPMENT ARE A TEMPORARY BARB/ER CONSISTING A SYNTHETIC FILTER FABRIC A 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 PROTECTION APPLIES 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 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 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 THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON -EROSIVE VELOCITIES. APPLIES TO BE APPLIED AT 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, 17, THE CONTRACTOR SHALL BEGIN INSTALLATION OF THE UTILITIES, CURB AND GUTTER, WALLS, AND ROADS. INLET PR07ECT70N 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 SHALL BE INSTALLED ON ALL INLETS IMMEDIATELY FOLLOWING THEIR CONSTRUCTION. THE INLET PROTECTIONS SHALL BE 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 INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED 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 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 BC3- BRADDOCK LOAM, 7-15% 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 MODERATELY PERMEABLE. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED. 12. ONCE PROPOSED CONSTRUCTION IS COMPLETE, THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE 318 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 70 BE COORDINATED STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES 17- OW CRAIGSVILLE LOAM-0 TO 2� SLOPES. SOIL 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 0-8" DIGS MAY BE REACHED AT 434 978 4435. IN ADDITION THE OWNER MAY BE FACILITIES. NO ITEM SHALL BE REMOVED THROUGHOUT ALL PHASES OF CONSTRUCTION UNLESS THE UPSTREAM AREAS ARE SCOUR AT STORMWATER OUTLETS 70 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 ERGS/ON 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 CONCENTRATED FLOWS. APPLICABLE TO THE OUTLETS OF ALL TERTIONS 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 D CHANNEL PIPES AND ENGINEERED CHANNEL SECTIONS. SEC VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 8WI 14. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE 319 RIPRAP: 36D- HA LOAM-15 TO SLOPES. SOIL IS WELL DRAINED WITH A HIGH RUNOFF A PERMANENT; EROSION -RESISTANT GROUND COVER OG. LARGE, LOOSE, ANGULAR ASSIFICA LA CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0- 7" THICK. STABILIZA7ION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL STONE KITH FILTER FABRIC 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 F, SLOW THE VELOCITY OF NC ENTRATED RUNOFF, TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. CONCENTRATED RUNOFF WHILE ENHANCING THE P07ENTAL 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_ POSITIVE DRAINAGE ':�. US EXTEND FULL WIDTH A INGRESS AND EGRESS TO SEDIMENT TRAPPING I f T NG DEVICE C F{RATION 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 GRAY. FILTER' n• RUNOFF WATE MESX iIUERLiER£0 WATER a II III IIII __ SEDINRR 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 � � -" - f -IEXTENSION OF FABRIC AND PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL - 4 WIRE INTO THE TRENCH. EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE Source: Va. DSWC SUPER SILT FENCE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE SSE. (WITH W/RE-BACK) 05- IMMEDIATELY. NO SCALE PIa,, 3-II-1 SCOTT/R, C' LU No. 35791 12/9/20 V/ ZZ O O� U to WZ:) In J z O H in z w ~ W W Ce 0 W N 0 N W W z z IR J J U r ti M M N co r N O N N J \J U) W 0 Q U U) W U) r� V O O N 0- U7 z J Q Q W pJp� LU 1..1� 06 6.L W V 1 Q a t- 1 Z LU (f) LLI = O 0L J z z Uj O W CD LU 1 0 z W Q U7 L,r' z LU O J U7 M O W b w a U) 182154 SCALE N/A SHEET NO. 5 6 z goo- - / _ _ - - -- - w ------ _ � / LIMITS OF DISTURBANCE APPROVED- PORTION OF EXISTING EMERGENCY ACCESS ` - - -7aa ,� PROPERTY LIMITS (TYP.) , I / w WOW _SIMON / / ` /j _ - WITH WP0203.900003 -- - . TO REMAIN DURING THIS PHASE SOIL TYPE — - - w ---- _ PROPOSED LIMITS OF DISTURBANCE (TYP.) N, — - w - --� _ 7B CONTRACTOR SHALL INSTALL - — - --- = R/W DIVERSION ACROSS THE (\ M --��` `_ / ,.� W - CONSTRUCTION ENTRANCE. -q; +\ A / i \, \• \ I i �_r j sNiv ftftwow D NMI III I Ir PHASE I DRAINAGE _ —: / /— l ® AREA TO SEDIMENT - SF �/ TRAP A = z.zoACREs - ---- ---- - _ f PROPOSED ROCK WEIR OUTFALL TO EXISTING DRAINAGE INLET \ \• r CONTRACTOR SHALL USE A PO ION OFTHEI=XISTING EMERGENCY CE _ ,,,.�_ • ` -- _ 5 I,�,y , �' ACCESS ROAD FOR THE PAVED CONSTRUCTION ENTRANCE.- _- _ CONTRACTOR SHALL INSTALL A WASH RACK AND ENSURE A _ __ I !�'�. \ \�j: --'\ \/••' / / fr MINIMUM 12' o' PAVED AREA FOR�NSTRUCTION ENTRANCE. ❑ - _ _ _ ,X - ` I+.PROPOSED ROC _ K \ _ OUTF �O / PROPOSED �� =_ --X— WEIR A� - ` STAGING AREA x '� � - 12X70'MN.W �( 7 7�6CK /- CULVERT WAS BE REMOVED'100 PROPOSED CONCRETE WASHOUT AREA SCOTT/R. Cb'LLINS2� No. 35791 ,>�l pow 12/9/20�� �'SIONAL E�Gl DRAINAGE DIVIDE (TYP) LOCATION OF \ � - y �A 5 q/V�'I/ �/� y� PORTA-POTTIES �r - --- _ 5 ./ / Z o - _ _ E LOCATION OF sa /Lj \ / / .// il, �_ - DD CONTRACTOR SHALL ENSURE J 2 B / CI I g _ _ � I OIL TYPE PROPOSED 18 DIVERSION. r A / / - 15 CY DUMPSTER POSITIVE SLOPE IS MAINTAINED. A S���Q . �• - _ Y````^ti.� �/ / /;• L V - BERM SHALL BE STABILIZED AS \ �� A� ��� _ ''y c� m LIMITS OF DISTURBANCE APPROVED = " l UCTION TRAFFIC SHALL A WITH WPOzoi o000 RBANCE. - - - _ - _ - v o Q A FIRST STEP IN DISTU 6 9 ' 3 -FUEL.�I,qNG AREA- - - �� ��_ t� v N z R SITE ACCESS / LOCATION OF - S -,, / i- >� F- CULVERTTO I THE FUELINGTAkSHALLBECOMPLETELY SURROUNDED BY �� ui Az'DEEP z'WIDEEARTHENBERMWITHAHEAVYMIL� ��. ---- - BEREMOVED / POLYETHYLENE LINING OR BE PLACED IN AN IMPERVIOUS X'�ce OPENTOPDUMPSTERWITHASIDEDOOR.THEPROPOSED -�- _ BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF 1' _ - j I A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS LL - / io% LARGER THAN THE MAXIMUM VOLUME OFSTORED FUEL. SF EXISTING CUL-DE-SAC TO BE REMOVED V) SANITARY SEWER W TOBE_REMOVED PROPOSED 18" DIVERSION. CO NTRACTOR SHALL ENSURE \ POSITIVE SLOPE IS MAINTAINED., BERM SHALL BE STABILIZED AS' W A FIRST STEP IN DISTURBANCE. IP _ Z -- C// / DID — - .I 42 LOT / / SOILTYPE BS"CRE , YPE PROPOSED STOCKPILE AREA TO BE r. // // // / / pRN A-T -1 14 _ ENCOMPASSED BY SILT FENCE AT ALL TIMES 1 pRtVATE`� Q LOT 1 / / 1 PHASE I DRAINAGE _" y , _ I - --- _, LOT _SOIL TYPE / J _ L9 AREA TO SEDIMENT / / \ / 16 ' 7B / / r/ - I / I I. I r LOT \ � / CS7 BASIN G=8.1zACRES / / f -' _ - /; // / - - . _ - { ZS - J f / r/ - LOTI co z 17 -- -- � PHASE I DRAINAGE / / / ` / - - co AREA TO SEDIMENT / / / / - - / Lo6T r PROPOSED SAFETY FENCE, -- -- - I i EXISTING TREELINE TYP. BASIN D = 6 aSACRES / / / / / / / , - INSTALL SIGNS WARNING SAF - - s -." / / (TYP.) - / / / / / / / Aj % • / �. -� LOT !� I M QUICK SAND, KEEP OUT" - -- _-� -- - - - - - - i/ �// ✓ // // �eS /// // //(� I LOT .18 ------------- PROPOSED 18" DIVERSION.( - --- = / / / / / / / / /F ! / /• I _ z7 i _ •mac-- �� �����'' i /� / 'f ��'� L, _ (Z Z M — / / ----- �- CONTRACTOR SHALL TP „ / / �� �/� �� P _ LOT OIL TYPE I LOT C Q POSITIVE SLOPE IS MAINTAINED. SOIL TYPE SOILS LINE (TYP.) f r/ z8 6D W O� / / _ 3 /'; / 19 J 8C -+ / LIMITS OF DISTURBANCE APPROVED ^^ BERM SHALL BE STABILIZED AS S F � � LPL ---- - �. ®A FIRST STEP IN DISTURBANCE. 3." WITHWPOzoig00003' - _ DD 1 r \ / i/ i / % / / / . / ��� i ' STING PLEASANT GREEN ' Q J EXISTING _ — PROPOSED BAFFLES t - - - - w� i / PHASE I DEVELOPMENT / . / ,..� � � � // � / / / / /, /�/ �� � °./ ��LOT � � V 1 O zo y 21 P ,- J Z O _ - _ LOT \ �'%' r ' � O // PROPOSED 18" DIVERSION. ram' / // ! / �"� / �'•/ 3 /// / LOT 2 3 / CONTRACTOR SHALL ENSURE�,' POSITIVE SLOPE IS MAINTAINEz4 D- / / / / ' ! �/ ,✓X s 3 / ��/ Lu < Lu DD'BERM SHALL BESTABILIZED AS AFIRSTSTEPINDISTURBANCE. r,�o' /' `//n//! IP / r .,, J L O ' • V LEVEL SPREADER O L( i _ . SF \ — // / y/ TEMPORARILY BLOCKED DURING CONSTRUCTION, — - -- _ Lu - - _ — — SOIL TYPE — / i yy, I > .' ; . i _ DIRECTING RUNOFF TO. THE PRIMARY OUTFALL (1' - - -- -- - .. - I I I TEMP. BLOCKAGE SHALL BE REMOVED ATTHE TIME _ — i - ,'" __ TP - - � - 36D � \ �� � e<i�s 5 I ��-..-�� �- �-/ S'(��_, j U 1 Cn �F THE TEMP. BASIN's REMOVAL. DOWNSTREAM / __ _. - -__ _ _ _ -� \ ` I �:•� �j� i v PROPOSED OUTLET PROTECTION TO BE VDOT STD. - - Y06 CLASS Al RIPRAP WITH FILTER FABRIC I . -. -�........P�SQJO XISTING ioo' WPO BUFFER (TYP.) i �9 / / LLI UNDERLAYMENT (L=8', W1=3', Wz=g', D=18") — . ' - — — — — — ---- --- " � - _. � ��' \ � � Z - PROP SEDSAFETYFENCE, �. = , � �` W TP - --' - - - - - -- -- --- _ INSTALL SIGNS "WARNING - / TING WETLANDS QUICKSAND, KEEP OUT' SAF Ip S% W 5F SF ul U) ck� PROPOS FLAT VDOTCL. Al RIPRAP LINED il \ 1 ' \ W / _ - Lu L - - - - OUTLET PROTECTION WITH FILTER FABRIC FLOW DIRECTION ARROW TYP. / \ z SEES PLAN FOR - ( ) UNDERLAYMENT(L=z8' WI-4.S' Wz=1z ',D=18") / \\ % /,.' LOT I --I OUTFACE DETAILS 49 \ - - 'F DISTURBANCE PROPOSED LIMITS O \ \ r) fl ~ ' SEE SWM PLAN FOR LEVEL CE (TYP.) LOT U) TURBANCE (TSPREADER DETAILS � � �,�" � � _ - - -- = _ - — - - - � EXISTING So � Q / _ -- -- - --- --- --- ---- , -- -- - -- - HEC-o-YR FLOODPLAIN PER ♦ \ �� I SOILTYPE RAS `� - -- - ANALYSIS PERFORMED \� \� ` W EE CLEARING (TYP. / " 17 BY COLLINS ENGINEERING IN -.. - / - - `-"- -- - zmg, SEE WPO zolg000z7) �\ / + ,. _ � ,. -- �: � \ I � � / / PROPERTY LIMITS (TYP.) � -.. �� APRIL ;, I i D RV \�5�\ I IL Y �EXISTING STREAMSf�READEROUTFALLPIPESHALLBP \.�7 TEMPORARILY BLOCKED DURING `-/ ® / - - ✓' Ow PROPOSED LIMITS O EE CLEARING (TYP.) + \ CONSTRUCTION, DIRECTING RUNOFFTO THE - -- -- - - Y r - - -- --- --- \ - / / ---- -- 1 ELLS CREEK --- - - \ \ \ \ PEIMARYOUTFALL.TEMP. BIME LOCKAGE SHALL �. THE - \ _ N / • -- --- _-_ / -_- _. � --_ _ _. � BASINnsOCONVERSION. VED ATTHE DOWNSTREAM - �p - ROPOSED OUTLET PROTECTION TO BE VDOT_' , - - / - - - - - _ - - - -- -- -- _ - PROTECTONIWIT FILTERFABRIC ET � ( Imo/ - - - - -- - - � - � -- ,�• ®- - , _ ' _ � - --- -- - - -- -- - - - - - -- �- CsI�,A CL�L i \ �\ -_ _ __ - _ UNDERLAYMENT L=8', W1=3', Wz=g', D=i8") - - / i /--- -- -- - - -- --- 40 0 20 40PHIC 80 ' 180 \ .p S SF SEE SWM PLA f Q 0 x iSOILTYPE a m r _ 7 JOB NO. IN FEET } \ A OUTFACE DETAILS i ine= 40 ft. � ___ _ \ \ \ PROPOSED FLAT VDOT CL. AI R PRAP LINED �' i - -- __ --- -- -- --- - -- - - -- __ --- - - - - - - - - - - -� ..� \ ` - - \ \ \ \ OUTLET PROTECTION WITH FIL R FABRICS UNDERLAYMENT L= ' W1=6' Wz 6' D=18" QP ' PROPOSED too-Y FLOODPL \ 182154CALF \_—\► 9, ) PER HEC-RAS ANALYSIS SCALE 1 \ \ \ - \ PERFORMED BY COLLINS°=4O' Y I o SEE SWM PLAN R DETAILS o Soyo ENGINEERING aolg000 7N APRIL zo1 , EE 00\ OO,�, ` SHEET NO. Oo O z 000 00 O �g5 0 � 6 — SO PE T / \ L BY — _ p SCOTT R. LINS u No. 35791 ,h gift \ / min =in ftim ft"! 0 12/9/20 100 40e � r IGNAL E � 100 ♦ / • wAl00 RO 100 ' goo Noll NOTE: NO CONSTRUCTION TRAFFIC SHALL USE CLING LANE FOR SITE ACCESS I A / All / U CO F1 i00,/ A v v _=� - W W � W / _ 1 �000 O v ,- �� F = ! PHASE I DRAINAGE r — o ! \\ �i / ■ \� \ AREA TO SEDIMENT C ' - / i � \ / / i � BASIN C = 8.iz ACRES o N ti SOIL TYPE \ (, PROPOSED SAFETY FENCE, / INSTALL SIGNS "WARNING i ! '.- - \� - - _ QUICK SAND, KEEP OUT S A L9 0411 \ i _ RAWAGE DIVIDE (TYP.) i M ! � _ (TYP.) LOW DIRECTION ARROW PR � \ EXISTING M� GED i i/ \ / ! i; �" ! M \ STEEP SLOPESVYP.) / / CONTRACTOR SHALL ENSURE - - -- --- \- - S / PROPOSED i8"DIVERSION. � �i � / ! A_ _ f/`� / / PROPOSEDi8 DIVERSION. I � � I I POSITIVE SLOPE IS MAINTAINED. I pp CONTRACTOR SHALL ENSURE �+�' - C � �' CV / / BERM SHALL BE STABILIZED AS POSITIVE SLOPE IS MAINTAINED. I _ y N � S \ PROPOSED LIMITS OF DISTURBANCE (TYP.) _ - - PROPOSED 18" DIVERSION. % A FIRST STEP IN DISTURBANCE. BERM SHALL BE STABILIZED AS— \ \ / / ! ' l / CONTRACTOR SHALL ENSURE / / / A FIRST STEP IN DISTURBANCE. * J POSITIVE SLOPE IS MAINTAINED_ / i� / _ _ Q /1 O BERM SHALL BE STABILIZED AS / / i<� '® pp \J J A FIRST STEP IN DISTURBANCE. _ - / w LU / SOILTYPE B / PHASE I DRAINAGE i S _ _ U) U 1-1 p AREA TO SEDIMENT _ BASIN B = 6.92 ACRES S EXISTING TREELINE (TYP.) - i / / / A ' Lu t / L9 F - w , / �/ ,/ / i 0000 woo SF z QLLJ PHASE I DRAINAGE g/ // U 1 Cn AREA TO SEDIMENT OZS PROPERTY LIMITS (TYP.) ! ! / ! i - - ` / TRAP = 2.93 ACRES - - - �ukf/— L - // -/aT- - - -- - -- - - - Y I / — ./ _ ' - - - PROPOSED LIMITS DISTURBANCE -' � z W W - - P OSED OF D STU E (TYP.) - - D _ - _ _ PROPOSED SAFETY FENCE o 1 / ! ' /' / / / - ' INSTALL ST QUICK SAND, KEEP OUT �5 j. / - - -- - - - - - - - - -- _,I �. - "-. AF TP PROPOSED LIMITS OF TREE CLEARING (TYP. � r - _ 'zW � 14z- - - - B 0 W ` EXISTING PRESERVED PROPOSED SAFETY FENCE, � � � � "� ' / � � �" � � W S F ,! p' STEEP SLOPES (TYP_) � INSTALL SIGNS' WARNING SAF „ � `� � __ �. ! / — SOIL TYPE a �— — Z W QUICKSAND KEEP OUT" \ - / / c � _ T 8C3 _ i �, EXISTING ioo' WPO BUFFER (TYP.) Ln PROPOSED 18" DIVERSION CONTRACTOR POSITIVES SLOPE IS MAINTAINED. - L Lu P S D BAFFLES ;�` _ALL ENSURE V _ _ / BERM SHALL BE STABILIZED AS - ` j '� UJ A FIRST STEP IN DISTURBANCE. PROPOSED LIMITS OF DISTURBANCE (TYP.) Q W S DD / - - / e PROPOSED ROCK WEIR OUTFACE ROPOSED LIMITS OF CLEARING TYP O Sg � ( �) �. ® p woo, (V e \ O PROPOSED XISTING ioo-YEAR FLOODPLAIN (TYP.) EXISTING Zoo WPO BUFFER (TYP.) GRAPHIC SCALE 01JTLET PROTECTION WITH FILTER FABRIC _ � - ED VDOT STD. CLASS AI RIPRAP LINED i �- OP UNDERLAYMENT(L=8', Wi=3', W2=9', D=3.8") WOO 40 0 20 40 so 160 \--- -. LEVEL SPREADER OUTFALL PIPE SHALL BE TEMPORARILY + / -- - -- - - - -- — _ BLOCKED DURING CONSTRUCTION, DIRECTING RUNOFFTO TP 7. THE PRIMARY OUTFALL. TEMP. BLOCKAGE SHALL BE REMOVED / =-� TP `� AT THE TIME OF THE TEMP. BASINS CONVERSION. SEE SWM PLAN FOR LEVEL "' (jw - - - - — EXISTING STREAM _ - - \ SEE SWM PLAN FOR - // / 0 w SPREADER DETAILS _- l 4 II� L 0 SF OUTFACE DETAILS SF / i i a m SOILS LINE (TYP.) i G JOB NO. EXISTING ioo-YEAR k �`I-_ -" 182154 FLOODPLAIN (TYP.) ' r ' - PROPOSED LIMITS OF TREE CLEARING (TYP. � (TYP.) � v � SOIL TYPE _ � � - � _ .. _- --- ---- '"- __ — �� '� ! � � -" SCALE ^� \ _ / ROPOSEDLIMITSOFDIST PROPOSED FLAT LP - - -EXISTING ioo-YRFLOODPLAINPER ' 1 1 -/,' p_4D , _ - - LINED - HEC-RAS ANALYSIS PERFORMED " / _ - — OUTLET PROTECTION WITH FILTER FABRIC__ -- BY COLLINS ENGINEERING IN _ - - " ' % SHEET NO.. / - D i8") - - - -- -- _ AlSEE WPO zoigoo027) _ -_. _ - % / / ERLAYMENT(L=iS', Wi=q. ', Wz-73 - / - - 7 r - — �REMAINDER OFEXISTINGEMERGENCYACCESSROADTOBE -W' goo ago- PHASE II DRAINAGE, REMOVED AND RELACED WITH PAVEMENT AT PROPOSED GRADE won NOW / LIMITS OF DISTURBANCE APPROVED- AREA TO SEDIMENT- - - - - _ _ _7� - ' _ - - - - - _ - - - - - -- »x 'TH ® PROPERTY LIMITS (TYP.) - WITH WPOzoig00003 �— REM O��j — TRAP A = 0.47 ACRES O� ___ O o� PROPOSED LIMITS OF DISTURBANCE TYP. - - �- ( _ M O �qC RrN DIVERSION ACROSS THE HE SCOTT R. LINS �W D _- X + IP �O I��No. 95791 ,L W W —CONSTRUCTION ENTRANCE. �w - i °12 20 — _ ,� -F---� -W -- _ � --- - -- - ❑ � - - - � � -' .-� , � •� � ' � ` � � �.., I � � ,� � � . � \� - / � I / / /�-� / / /lsSlONAL ESQ / CONTRACTOR SHALL INSTALL A WASH RACK AND ENSURE A _ '' „ ,CJ - �- �, DC MINIMUM 12'x70' PAVED AREA FOR THE CONSTRUCTION ENTRANCE.') a✓ q) / /��" PROPOSED CONTRACTOR -x� STAGING AREA '�� — °� �� PHASE i z' o' MIN. W/ / _ - WAS7!AKSF i PROPOSED CONCRETE \ \ \ ✓/ / / / //// ✓• WASHOUTAREA - _ LOCATION OF / 6 - �5 PORTA-POTTIES I z PROPOSED i8''DIVERSION. X' - I \:I / O Q V/ O Z LOCATION OF ' _ ' - "t68' POSITIVE SLOPE IS MAINTAINED. -1 6,�CO / s V m ' � DD CONTRACTOR SHALL ENSURE / i5 CY DUMPSTER ` - _ _I LIMITS OF DISTURBANCE APPROVED" BERM SHALL BE STABILIZED A5 _ \ s L ICI n 6 ` _ WITH WPOzoi 0000 DISTURBANCE. - - - -- - - UCTIONTRAFFIC SHALL i 9 3 �, O o / A FIRST STEP IN DISTU _ a LOCATION OF , x x . �x SJ F - - _ ,� �T. H o FUELING AREA - - `'- OFF F% I�1 - - - / /<, Ln z R SITE ACCESS � THE FUELING TANK SHALL%E COMPLETELY SURROUNDED Buj Y I Az'DEEP,z WIDE EARTHEN BERM WITH A HEAVY MIL � � �� � �'� � � I � vED IN AN IMPERVIOUS� �� �_ __- L/ �� O' , "PEN -TOP DUMPST RPOLYETHYLENE GWIITH A , OR BEI ECDOOR. H THE \�,/ ---- --- - - - - \\ — M \ •\ 7 - c BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF �— -� - A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS w io% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. ) SF x __ J \ I : %Y DCLu / O fi DRAINAGE DIVIDE TYP. - �� POSIT - CONTRACTOR 5ED18 DIVERSION. L1J � / \' SHALL ENSURE _ �,�'- ) 1 / " ( - ,�,--- _ _ TS POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABILIZED AS / / I P ' W A FIRST STEP IN DISTURBANCE. - - IP LOT \ O i i ' PROPOSED STOCKPILE AREA TO BER�V ENCOMPASSED BY SILT FENCE AT ALL TIMES 1 ATESTR�" /`` LOT IP - TS / DC - - - -- - i SF - - - -- PHASE II DRAINAGE / '« - PHASE II DRAINAGE ' AREA TO SEDIMENT O t -� _ LOT L9 AREA TO SEDIMENT BASIN D - 6.z ACRES d LOT SLOPES GREATER THAN 3:z SHALL BE PLANTED WITH NATIVE STEEP SLOPE��"� MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF J//'' z ' BASIN C =10.95 ACRES 6o LBS. PER ACRE, OR z LB PER z,000 SF, UNLESS SPECIFIED OTHERWISE. 4 -- -- - - LOT17 z - DC - - - - - __ - F � �s co PHASE II -- _t '- � _ I � oT � / ��I _ N ROPOSED SAFETY FENCE, - _-- - - - Lz6 INSTALL SIGNS "WAR NING - - i - -�, ,,...�1 - - - -- - --- ,.:.. - QUICKSAND,KEEPOUT" SAF P,�E �I� .�,:, `-, / M L y� _ -.- ''PROPOSED i8"DIVERSION. r / �� � O i�' ; I � V' N LL --- _ ' / z e i - BM - - - CONTRACTOR SHALL ENSURE - y / ✓✓ / ' SF 7 --%-- - TS TP r3 ' - �. LOT : / / /. LOT O Q _ - POSITIVE SLOPE IS MAINTAINED. - - _BERM SHALL BE STABILIZED AS �'' SF ' ", LIMITS OF DISTURBANCE APPROVED �,�"�^. + � � � �9 A FIRST STEP IN DISTURBANCE. - '�� - -- "� WITH WPOzoig00003 -- — - N EXISTING PLEASANT GREEN Lzo O PROPOSED BAFFLES -- -- _- -- - DD - -_ _ ��� LQT PHASE I DEVELOPMENT � 29 / / / / �'v LOT _ /K, / /jam /v A z� % Lu O� I --I O \ O - - - - - - � j � � � - „�x-. IP� /'� ..LOT � �/ LOT 22 \ � Lu O - _ - _ _ _ / RPOSED i8 Lu DIVERSION. _ 3� / Y _". LOT z3 \ A CONTRACTOR SHALL ENSURE Z POSITIVE SLOPE IS MAINTAINED, L �4 q ' �'Lu `BERM SHALL BE STABILIZED AS - ( �, � 32 A FIRST STEP IN DISTURBANCE. i,•, } _ - H � � i � LEVELSPREADER OU P Hql B r. .�� � .- �___-�_ SF_ __ - � _."-- � - � D� -SF 't�l � � �'' � i� /' ��� /�" S q A i'i / 0 J T uj TEMPORARILY BLOCKED DURING CONSTRUCTION, - - '' -- �- --- - - - _ � - '� � - --=y^ DIRECTING RUNOFF TO THE PRIMARY OUTFALL. �''' ---- - -- - �9 A�O�... �i_�����,' ^/ U� Q LL _ � :�-'"°"`� ":'• = TEMP. BLOCKAGE SHALL BE REMOVED THE - � � %f'�' i �-�_„ `- � ___ _ ,;, C/C %''...� _, �_ ._, ,., � TP - - - - � `�. a S � •. I �� .,, �i � '(Eta � ; " �:. ' � U 1 --r TEMP. BASIN's REMOVAL. DOWNSTREAM ---- - - �.... ST RF "' s I �� ._-��[�'�R:' % 1 .>. PROPOSED OUTLET PROTECTION TO BE VDOT STD. - - -. ,�..'' __ --- - __ _ . -..., �F% . - _. , 06 �� C,'C ��\L Y -' CLASS AI RIPRAP WITH FILTER FABRIC --- - " _- -- - / _ _ _ XISTING ioo' WPO BUFFER (TYP.) .' P 9QJ i /: Z ..UNDERLAYMENT (L-8, Wi-3, Wz-9, D=iB) - - - --- -- - '' a` ✓ Lu _ - - PROP SEDSAFETY ENCE, - �\O,I �� j /�N / /�/ _ - -' % -- - - - -- - - -- - - -- - - INSTALL SIGNS "WARNIN _ _ - P �A/�` =-�'� / -yr — LU O I H TP r Lu TING WETLANDS " QUICK SAND, KEEP OUT AF ,_ in - _ E a (n SF SF - - OIL J LA 0 - x L PROPOS FLAT VDOT CL. Al RIPRAP LINED - "y FLOW DIRECTION ARROW (TYP.Y w / ` O •�"��\ L OUTLET PROTECTION WITH FILTER FABRIC i - x ', Lu SEE SWM PLAN FOR' ' O ,r LOT I --I ' OUTFACE DETAILS UNDERLAYMENT(L=zB', Wi 4.5' W, z=za.T, D-i8") - _ A� '��. - - _ A A"C i I-i PROPOSED LIMITS OF DISTURBANCE (TYP.) � \ \ ,�% � �o � 49 Lu LOT U TURBANCE (TYP.) SEE SWM PLAN SPREADER DETAILS LEVEL z % EXISTING ioo-YR FLOODPLAIN PER ♦ - - - j __ _ HEC-RAS ANALYSIS PERFORMED i/ > A EE CLEARING (TYP. i � �� - - ��� ui BY COLLINS ENGINEERING IN ,i t �` V A, �, , � - " zoig, SEE WPO 201900027) _ - D i V i Lu r y A: PROPERTY LIMITS (TYP.) _ APRIL \ i / � � OP � �- \ EXISTING STREAM Q d. \ -� ALLB /J LEVELSAREADEROUTFALLPIPESH BE \ \ �� i'i j < \S O RI YP J TEMPORARILY BLOCKED DURING v / LIMIT + CONSTRUCTION DIRECTING RUNOFFTO THE - 3 O OwELLs C - - NG (TI .) \� PRIMARY OUTFALL. TEMP. BLOCKAGE SHALL '� ' ' Q _ PROPOSED EECLEA l - R EEK EREMOVEDATTHETIMEOFTHETE TEL i N BASIN'sCONVERSION. DOWNSTREAM / _Wi O ROPOSED OUTLET PROTECTION TO BE _01 1 ' \ A - - - - - - - - - --- ---- - - / - -- -- - - - - - - - - _ --_ _ TP TD. CLASS Al RIPRAP LINED OUTLET -�' ( �G. o - - - --- _ -- - - -- - -- -- - -- _ PROTECTION WITH FILTER FABRIC GRAPHIC SCA _ u ' 40 0 40 80 �,� � 180 \ \ OD , - � (U DERL YMENT i 3', Wz g, D i8") � of V - -- -- !-/--/_ - --� ----- _ - - O SE Sce S F _ SOILTYPE a in — — �s�---�— �v I - IN FEET) OUTFACE DETAILS \ \ \ \ OUTLET \ ` \ \ \ \ PROPOS FLAT VDOT CL. AI R PRAP LINED \= JOB NO. - - \ _ i inet-i \ �_��� \ PROTECTION WITH FIL R FABRIC 182154 UNDERLAYMENT L= Wi=6' Wz 6' D=18") �- PROPOSED S ANALYSIS OODPLAIN \ \„ SCALE ( 9�, PER HEC RA5 ANA PERFORMED BY COLLINS 'OO�� C �� ]'�=40' _ _ 1 P. SEE IWM PLAN F J VEL .O OO OO ENGINEERING IN APRIL zoig, SEE O *t-' SPREAD DETAILS WPO zoz9000z7) ��'�, )• SHEET No. - -- - '-- -- LLC I / OOoOO o0. �OOo Oo 8 H OF�� ICROA SCOTT R. LINS� D \ \ I EX1511NGRP DC u No. 35791 h wft imam mom 12920 soft - ZONAL 100 RP�LR Roy e� / too 000 i 100 100 NOTE: NO CONSTRUCTION TRAFFIC SHALL USE CLING LANE FOR SITE ACCESS � � A \ / o a 'I CO �/ - -- �"� U) D / / W -- 00 Opp / / \ILI ll V i // / � / i I � � PHASE II DRAINAGE AREA TO SEDIMENT C BASIN C = io.95 ACRESnr o OW \,- � ROPOSEDSAFETYFENCE, INSTALL SIGNS "WARNING CSA QUICK SAND, KEEP OUT" L9 J � co r \ RANAGE DIVIDE (TYP.) - i - /�� _ LOW DIRECTION ARROW (TYP.) r i , / / _/ - - PR 4 Q EXISTING MA IAGED i / M - v � STEEP SLOPES (TYP.) /� \ \ \ ' SB i PROPOSED LIMITS OF DISTURBANCE (TYP.) TS V -- W N / \J I -'� SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE STEEP SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF i _ /`� � 6o LBS. PER ACRE OR 1 LB PER 1,000 SF, UNLESS SPECIFIED OTHERWISE. / � WW. woo J H1 z PHASE II DRAINAGE - i / , / J O AREATO SEDIMENT / U \ / / BASIN B = 7.83 ACRES = y ` . (� - - _ U) Lu / _ Lu /' / - DC _ - L W / / =DC - DIDA z < Lu �� ` PROPERTY LIMITS (TYP.) i j�— - PHASE II DRAINAGE _ _ 7 j5 "'` _ - `� - - - -- AREA TO SEDIMENTLu � - // TRAP B = 1.18 ACRES - _ / / - - W L PROPOSED LIMITS OF DISC � � � W DD PROPOSED SAFETYFENCE, -- TURBANCE(TYP.)-- D ~ (%% INSTALL SIGNS "WARNIN Ui QUICK SAND KEEP OUT" A - - I - \ - ' F � TP -POSED LIMITS OF CLEARING ) (�I/► _ i `LLJ �O T LLu W _ _ �, TREE G TYP. / _ EXISTING PRESERVE z STEEP SLOPES (TYP.) ,� IP -TALL SIGNS' WARNING '� `_' � "`� "` SF � 120POSED SAFETY FENCE, � - ;� I�, � T� � ' QuiCK SAND, KEEP OUT" SA ;i - - DC / - e, �- -.".�� _ _ ^ z Lu EXISTING ioo' WPO BUFFER (TYP.) \��,ef t S DBAFFLES-Y DID d. V 1 S S - a i D� - ® ROPOSED LIMITS OF DISTURBANCE (TYP.) _ -- PROPOSED ROCK WEIR OUTFACE Q w TS — / kmj - o 0L SB ROPOSED LIMITS OFTREE CLEARING (TYP.) O T-r B PROPOSED XISTING ioo-YEAR FLOODPLA[N (TYP.), GRAPHIC SCALE EXISTING too' W PO BUFFER (TYP.) r O ED PROTECTION T STD. CLASS AlAI ER FABRIC LINED Q, „�— UNDEROUTLETMENT(L=8 WITHFILTERFABRIC _ r� �p UNI?�RLAYMENT(L=8', W1=3', Wz=g', D=i8") no o so 40 a ,so LEVEL SPREADER OUTFACE PIPE SHALL BE TEMPORARILY BLOCKED DURING CONSTRUCTION, DIRECTING RUNOFF TO _ - — " THE PRIMARY OUTFALL.TEMP. BLOCKAGE SHALL BE REMOVED / _Tp_ -- '� ATTHETIME OFTHETEMP. BASIN's CONVERSION. SEE SWM PLAN FOR LEVEL ` EXISTING STREAM ( E4 i / i / SEE SWM PLAN FOR SF + SPREADER S j o, O AIL EAM — _ - - - OUTFACE DETAILS �' i � i � i � / � i a m REA-DER DETAILS / l -� � � JOB NO. 1 / i EXISTING ioo-YEAR/ — / � ��� �� � , - x � � � � � / / ei � , ` � � 182154 FLOODPLAIN (TYP:) ROPOSED LIMITS OF DIST CE / �� OPOSED LIMITS OF TREE CLEARING (TYP.) (TYP.) / _ i ,�" - — ' - SCALE TYP. ��A PROPOSED FLAT VDOT CL. AI RIPRAP�L p — — -EXISTING ioo-YR FLOODPLAIN PER - / / _ _'_� - _ / 1 _40 ' - -�LINED H - PERFORMED ' OUTLET PROTECTION WITH FILTER FABRIC__ E BY COLLINS ENGINEERING IN - - _ — % SHEET NO.. ERLAYMENT(L=iS', Wi=y.'—Wz=7.5�D s8") _ APRIL2019, SEE WPO 201900027) i 9 - - 0 w - - --- --- SF �w _ __-- — — ------ _ _- / LIMITS OF DISTURBANCE APPROVED- w \ / -- - - - 7aa - - -, _ - - — - __ s=.= PROPERTY LIMITS (TYP.) j _ - WITH WPOzoi900003 PHASE III DRAINAGE w' / - - - _ _ -- -- pyTH 0 -- - - � AREA TO SEDIMENT - - _ PROPOSED LIMITS OF DISTURBANCE (TYP.) ----- \v - ---- TRAP A = 0.25 ACRES O� SCOTT R. LINS IP u No 91 - - 12 9 20 � - �— RWD /- x 76o I ' \ I ,\ IpPROPOSED ROCK WEIR OUTFALL� bx _ - -TO EXISTING DRAINAGE INLET /700 / a \, 0 : TRACTOR CE T iNG AREA?-N \ 12'x70' MIN. „ - WASH -RA SF C PROPOSED CONCRETE �Z/ v �,, `✓ i / % /! J LOCATION OF WASHOUT AREA POTTIES LOCATION OF' ' - _ .vee: `i- / 4/�. i i .i i � I �..� : • E g IP i5 CY DUMPSTER S6A - uvi � L IT DISI) RBA A P G �� - - J - i 4' / \\ \ L �~/� w m TIOT N TRAFFIC St ITE ACCESS; fs 6 - /' LOCATION OF / SST �c0 - - - - - - _ i/ J \ o J Ln j5 .1" FUELINGAREA- `/ \ PFF F% I s •` THE FUELINGTAk SHALL BE COMPLETELY SURROUNDED BY I--1 w _ Az'DEEP z WIDEEARTHENBERMWITHAHEAVYMIL � � Pf�,-� / � / uj POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS IP i �w0 OPEN TOP DUMPSTER WITH A SIDE DOOR.. THE PROPOSED., r'I /- 95 IP BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE EVENT OF - \ IP j Ip A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS 1o% LARGER THAN THE MAXIMUM VOLUME OFSTORED FUEL. � i � SF — W SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE STEEP SLOPE, MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS ATA RATE OF SF 6o LBS. PER ACRE, OR 1 LB PER 1,000 SF, UNLESS SPECIFIED OTHERWISE. i 1 PSz— PS i - IP IP - - , — SF ,k ,aa / _,' - —__ PS Ip o PROPOSED STOCKPILE AREA TO BE i PR�V PEE T 14 IP" S ENCOMPASSED BY SILT FENCE AT ALL TIMES ^� / C RIVATE5IREE 1 ` IP / - LOT - _ •. ,CONTRACTOR SHALL DELAY THE CONVERSION OF ' / � ICJ SF - - - -- ji3 - -- - - - � _ _ PHASE III DRAINAGE AREA TO SEDIMENT L9 SEDIMENT BASIN C FOR AS LONG AS POSSIBLE. - = PHASE III DRAINAGE : ' F[NAL CONSTRUCTION OF LOTS 8r,-87, UTILITIESBASIN D 4.3S ACRES , AREA TO SEDIMENT 5 DRAINAGE & FINAL PORTION OFTHE RETAINING ♦ BASING=9.66ACRE5 - WALL SYSTEM SHALL OCCUR ATTHETIMEOF IP Ip IF Ip IP _ ♦ IP� - a - % / z5 /� - LOT Z M THE TEMPORARY FACILITY'S CONVERSION. { N - - I IP / 1� it IP M - - i / -� � r / R POSED SA E Y FENCE ' ` --- -- il..-•; _ ;/--lp Z LOT IP / / I I LOT / QUICK SA D,KEEPOUT'rt � `� ---- --` - --- - - l^.` .- -. ___= = --- 1 .r__. -._ � i � � /.� I z7 I /.` i8 � - S I -- I N CL O Q °' IP LIMITS -- EXISTING PLEASANTGREEN \ N ' ED BAFFPHASEIDEVELOPMENT z9. LOT 21 ' A /-V 0 - - .` - ,. ` - ,, �.. -- .LOT ,-�� a \ `. ✓' zz f - IP ' ; I � - - _ - - - ;" / PROPO �j 2 IVERSIO - „ . .Y '�' j - / �'• 1 l ir L03 � � � ��1 w - - �/ i -I / z6 ONT CTV HALLENS / IP, z - r! LOT LOGS � Z Lu ESTABc BILI DA - � � `�i" �, /� �' j � � G ' _ 4 _ LEVEL SPREAD RO LLI FrAZ B o �. __ F_ - - � - _ �- - 1, I -., V. _ � Q - W _ -TEMPORARILY BLOCKED DURING CONSTRUCTION, 7---XISTINGioo'WPO ¢UNOFF TOTHE PRIMARY OUTFALL. o;. / / - „_ - - - 9'p 1 � :�KAGE SHALL BE REMOVED ATTHE TIME , - ,•'e;- ' .--- --'_IC� � .! � �/ UFTHETEMP. BASIN's REMOVAL. DOWNSTREAM/ i � ---� -.., '� _ ` S F �',..- s I � �,.� � i-. ..�SCR .../ UV PROPOSED OUTLET PROTECTION TO BE VDOT STD. �� �RAPWITHFILTERFABRICBUFFER(TYP.).--------___ - _ - � `. ; �, .�:" P' `e `'\ 'UNDERLAYMENT (L=8', W1=3', W2=9', D=i&') - / - - - - - / -- IP A' • �'�" 49 / W LU O a, _ z w TING WETLANDS. 3oa \ t i� D SF �F oIL E" / LA (n \ O - -- -- O V W OUTLET PROTECTION WITH FILTER FABRIC �� - - x oa �O / PROPOSED VDOT STD. CLASS Al RIPRAP LINEDv PROP05 FLAT VDOTCL Al RIPRAP LINED _ L Lij SEE SWM PLAN FOR `� - / FLOW-D1R€CTION ARROW (TYP. �\ ,' OUTLET PROTECTION WITH FILTER FABRIC LOT 1 � UNDERLAYMENT (L=z8', W1=4.5' Wz=zz. ', D=18") \, ' \ - _ - OUTFALL DETAILS iV%A=oa UNDERLAYMENT(L=zS', W1_9, Wz=iz D i8) I --I SEE SWM PLAN FOR LEVEL OP / / PROPOSED LIMITS OF DISTURBANCE (TYP.) LOT 49 W -- TURBANCE (TYP-) \ - z _ - ER DETAILS - -- Y - - EXI TIN z YR L� i \.. ----- SPREAD,- - S G oo F OODPLAIN PER 1 - _ ��� - -� J Q K., Q EE CLEARING (TYP. - - _ __ _ _ - - — - SEC-RAS ANALYSIS PER - _� • \ W _ - - - - - - I BY COLLINS ENGINEERING`1Td� °a - I I� \ , �, , c -( ) _. - _--.. -----�zoz9, S��PO zol9000z7) 1%- F - -,., O i�\\ \ I ' \ . �. i PROPERTY LIMITS TYP. - \ i r- AP s i i / W EXISTING STREAM .,\ - \/ RIL \\ \\ I. \ LEOS READEROUTFALLPIPESHALLB \ \ �\ i i j a TEMPORARILY BLOCKED DURING CL / f / - ✓ PROPOSED LI1v�IT5 0 EE CLEAR+NG (TYPJ CONSTRUCTION, DIRECTING RUNOFFTO THE ., p O w��LS PRIMARY OUTFALL. TEMP. BLOCKAGE EREMOVED ATTHE TIME OFTHETEMP. SIN'sCONVERSION. DOWNSTREAM E VDOT_ \ - / \ \ P OPOSED OUTLET PROTECTION TO B I � r- ---- - - - - _ -- - - - - - - - - - - j \ TP f \. CLASS Al RIPRAP LINED OUTLET N RLAYMENT L=8', W1=3 BRIG --- _ - - _ GRAPHIC SC / \ -'�� A : ' V ECTION WITH TER F Wz-g D-18) - -. \ - - ao 0 zo ao eo ieo \ ssa v v� SF �� ` " O s I - - SEE SWM PLA A + - Q p w / SOIL TYPE � a v=i IN AEI) -� OUTFACE DETAILS x? JOB No. 1 inch=- 40 eft \ PROPOSED FLAT VDOT C .AIR PR P LINED 9�� Z � 182154 - -- - -- -- - �, A .............. - � - -- - -` \ \ _ - - - UN L = _ =1 ESED i ANAFYSI L - % - - \ `- \\ OUTLET PROTECTION WI= FIL FABRICO PR OSEDtoo-Y fLOODPLAI \ \\ NT(L9'W�6',Wz ',D 8') 'P \.. PER HEC-RAS S �� SCALE D' PERFORMED BY COLLINS V OO C 1 1=40' - - ME / ER AYS E SWM i P IAN IVEL ,/ o Oo ENGINEERING IN A IL 2019, SEE o � ®\ SHEET NO.�OwPo zo19000z7)SPRAD R ETAILS/�I 10 I OOO� 0 1 . ---- z w w Z Z w z J J U O C N y C O U C N 3 m n x v s 0 t 3 c s 0 m 0 U J N C O U O C O m C a L O U 3 C O U O a N O L J 0 3 U C N N O N O L 3 N 0 a a h C O O v v 0 c 0 r C O O d O N O L 3 C N U 3 a O d N O C T O E n 0 c� z w w z Z w Z J J O U 0 T N d O d N N O x N L N O N C E 7 U O a a N O U O O C O N C O a m N N L H SEDIMENT BASIN'C' DETAIL - - i \ ` SEDIMENT BASIN'D' DETAIL SCALES i"=zol _ SCALE: :C-20' - � - � ��- _ - - TEMPORARY 048" CMP RISER WITH A RIM ELEVATION OF 72S.50'. RISER TO INCLUDE A v ° W j j TRASH RACK & ATEMPORARY 06" DEWATERING ORIFICE (INVERT ELEVATION OF 7z1.g6'). - s� ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION PROPOSED SAFETY FENCE, \ \ W OF THE TEMPORARY FACILITY TO A PERMANENT SWM FACILITY, THE CONTRACTOR SHALL INSTALL SIGNS "WARNING \ Any REMOVE THE TEMPORARY RISER AND TEMPORARY DOWNSTREAM CMP BARREL _- - - -QUICK SAND, KEEP OUT' --- DISCHARGING INTO PERMANENT STR. C-012 & INSTALL THE UNDERGROUND DETENTION SYSTEM. SEE SWM PLAN FOR ADDITIONAL PERMANENT SWIM FACILITY DETAILS. Y<^ ° G7 SCOTT R. LINS No. 35791 12�1 po`�t 12/9/204� 1'SjONAL E��l -746 D 4 ° 732 _ - + PROPOSED SAFETY FENCE, Ip ° vow 734 73 72 _- ♦ I_ �\ y ' INSTALL SIGNS "WARNING \ Z QUICK SAND KEEP OUT" / PROPOSED WOODEN B F LE 722 V� 72 - TOP ELEV. 726.o0 - �o Z ' d 1- _ _ s STR. D 1 \ O U g U m �d CIS CONVERTL DBTOCKPERM'. + O \ \ WATERTIGHT UNTIL SB D ,A w q TEMPORARY CMP RISER TO BE SET IN A \ N V/ J - I N - _ - EMERGENCY SPILLWAY w/ 4a SIDE SLOPES & � PERMANENT FACILITY. `N o 6 _- FOUNDATION MEETING MINIMUM VESCH / 1z m PROPOFILTER FABRIC UNDERLAYMENT (STONE G s s z: i s \I 18"). SPILLWAY CREST ELEV= 00.75' DEPTH= . , �O \ �, FI i! ,` k r W SPECIFICATION 3 14 REQUIREMENTS. 1 - ce I b I K. D-103 (12" DPE)� THE O ENING FOR THE y - 12" HDPE SHALL BE TEMPORARILY BLOCKED I I P O OSED 10 DE TOPJ F AM. 11 ; ' EXISTING too-YR FLOODPLAIN PER o� yo \ ti WITHIN THE MH TO PREVENT RUNOFF FROM TOP OF DAM ELEVATION=728.0'. p - - _ HEC-RAS ANALYSIS PERFORMED BY ` o \ \ ENTERING THE LEVEL SPREADER & 719 - COLLINS ENGINEERING IN APRIL zoi { \ \ CONSERVATION AREA. TEMPORARY BLOCKING 48.00 LF OF CMP Cal 0.5o%TO SERVE AS THE TEMPORARY RISER g' O �'� SEE WPO zoig00027) WP I tcEAM \ j.- \ �. ° � SHALL BE REMOVED AT THE TIME SB D IS OUTFALL. TEMP. PIPE OUTFALLTO DISCHARGE INTO PERMANENT --- BUFFER, TYP. STR. C-1oz. TEMP CMP INVERT IN=71g.75, INVER OUT=71g.51) \ \ \ CONVERTED TO A PERMANENT F / C PERMA AC LITY LINED / 726 STR C-102 \ / � + \ STR C-107 (12" HDPE), THE OPENING FOR THE 12" HDPE SHALL BE PROPOSED 10' WIDE TOP O�AM a� \ PROPOSED VDOT STD. CLASS AlRI RA - -- =�4 �TEMPORARILY BLOCKED WITHIN THE MH TO PREVENT RUNOFF FROM P 72 ENTERING THE LEVEL SPREADER & CONSERVATION AREA. TEMPORARY 1 ELEVATION=7o2.0 , 8 \ OUTLET PROTECTION WITH FILTER FABRIC " BLOCKING SHALL BE REMOVED AT THE TIME SB C IS REMOVED. TO PREVENT FLOTATION THE RISER BASE 5�H BE FIRMLY \ (UNDERLAYMENT L=8', W1=3', Wz=g', D=18") - - - - --' ` 72 EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE PROPOSED VDOT STD. CLASSAlRIPRAP LINED OUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. y TEMPORARY 018" CM BARD REL - 3 OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT L=8' W1= W2= D=18" A bOT STD. B-1 CONCRETE MANH LE BASE WITH A 048" SHALL SERVE AS - - - TO PERMANENT ST . C-ioz ,,, � - ' �\ c v \, P"POPOSED 35' E VDOT CL. Al - - . N 9 ( 3, 9'T ) /x ( ) RISER s LOWER O a RIPRAP LINED EMERGENCY SPILLWAY RC' / SECTION, IN CONJUNCTION WITH T PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" w/!}a SIDE SLOPES &FILTER FABRIC �2 7�� '' '� r03r7, STR C-104 x STANDPIPE WITH A RIM ELEVATI OF 699.75' SHALL COMPLETE THE STRUCTURE. RISER TO UNDERLAYMENT (STONE DEPTH=18"). INCLUDE A PERMANENT TRASHRACK & ATE RARY 05" DEWATERING ORIFICE (INVERT ELEVATION OF o~ SPILLWAY CREST ELEV.=726.5o'. 20� �DF _ 697.76'). ONCE THE SITE IS STABILIZED AN E ESC INSPECTOR HAS APPROVED THE CONVERSION OF PROPOSED FLAT LEVEL SPREADER'C'. 5 T HA E - + TEM TEMPORARY DEWATERING ORIFICE WATERTIGHT. S SWIM FACILITY, M PLAN FOR ADDITIIONALL PERMANENT 5WM �� >02 H A iz" DEEP PLUNGE POOL & 6" WIDE RIGID LIP. LS �_ r FACILITY DETAILS. ALL CONN IONS SHALL BE WATERTIGHT TYPICAL. TO INCLUDE A VDOT CL. Al RIPRAP LINING AND A - ;;; >� >0 ♦ I SLOPED 3' (MIN.) VDOT CL. AI RIPRAP LINED ^ °0 u h �i r Off, PROPOSED FLAT VD CL. Al RIPRAP LINED x 9g T� !i EMBANKMENT DOWNSTREAM FROM THE RIGID LIP _ �Q �' TWPO STREAM BUFFER, TYP. PROPERTY LINE TYP. OUTLET PROTECTION ITH FILTER FABRIC EXTENDING TO THE EXISTING GRADE, ALL RIPRAP --� ti UNDERLAYMENT (L-g, 1-6, Wz-6, D-18) TO INCLUDE FILTER FABRIC UNDERLAYMENTS & --_ Y \ ` ^i \ - - v vo (� \\V � x DEEP. �w ,Y, ,�.. ,.. ,;. a .. _ �. � _ BE A MIN OF 18" __ o ANALYSIS PERFORMED BPROPOSED ioo-YR DY COLLINS ENGINEERINGSN z X NOTE: SEE SWM PLAN FOR DESIGN IN ORMATION AND PROFILES k IN �1 I OFTHE BASIN OUTFALL SYSTEM D LEVEL SPREADER. - APRIL 2019, SEE WPO 201900027) (M P ED PR RO OS PROPOS I VEL SPREADER'D LS TO HA O OS FLAT LE . i2" NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES P DEEP - ,� v � , O IZ 1 OF THE BASIN 0UTFALL SYSTEM AND LEVEL SPREADER. VDOT STD. EW-i PLUNGE POOL & 6" WIDE RIGID LIP. LS TO INCLUDE OT CL. Al ,,, / O O O + ` x - RIEMBANKMENTDOWNSPRAP LINING AND A OTREAMFRPED IOMTHETIGIDLPIEXTENDINPRAP I DG ry o O O N J EXISTING ioc-YR FLOODPLAIN PER II, HEC-RAS ANALYSIS PERFORMED J R POSED FLAT PROTDOT ECTION Al RIPRAP r UN. AL LAYMENTS I BE MIN. OF 18" DEEP. y O ® N ~ BY COLLINS ENGINEERING IN _ - - - TLET PROTECTION WITH TO THE EXISTING G O APRIL zoig, SEE WPO zoig00027. _ - - - FILTER ERLAYMENT ' G GRADE. ALL RIPRAP TO IN LUDE FILTER FABRIC O O �I > U) O 1 - PROPOSED CONSERVATION EASEMENT. AREA WITHIN i-4.5', W2= D=18") I �O O OO ® O LU W - - EASEMENTTO REMAIN UNDISTURBED & TO BE LOCATED �� -- - - U J H J A OUTSIDE THE LIMITS OF DISTURBANCE, EASEMENT PREVENTS 1 FUTURE DEVELOPMENT DISTURBANCES &SITE CLEARING. W ri F.. Sediment Basin V Design MINA-WISPUWAY 2' WITHOUT CREST OF EMERGENCY SPILLWAY drainage area (acres) 10.95 DESIGN HIGH WATER basin volumes: (using 2' contour intervals) (25-YR. STORM ELEV.) elevation (ft) contour area (sf) volume (cy) D.5• 719.00 5625.0 0 D - -- -- - 720.00 6329.0 221.2 RISER CREST 722.00 7624.0 744.4 • DRY STORAGE • D DEWATERNG DEUCE 724.00 9452.0 1383.4 WET STORAGE 726.00 11212.0 2147.8 728.00 13078.0 3046.5 SEDIMENT CI.EAMGUT (• POINT WET • STORAGE REDUCED TO 34 C.Y./ ALRE) wet stora-ge: wet storage required (cy) (67*DA) 733.7 design high water (ft) 726.50 dewatering orifice elevation (ft) 721.96 top of dam (ft) 728.CO wet storage provided at this elevation (cy) 733.7 top width of dam (ft) 10.0 available volume before cleanout (cy) (34*DA) 366.8 bottom of basin (ft) 719.00 cleanout elevation (ft) 720.56 approx. bottom dimensions: 4Tx125' distance from cleanout to orifice (ft) (> 1') 1.4 upstream face slope: 2:1 downstream face slope: 3:1 dry st:)ra0e: dry storage required (cy) (67*DA) 733.7 baffles: YES principle spillway crest (ft) 725.50 length of flow, L (ft) 82 dry storage provided at this elevation (cy) 1223.0 effective width, We (ft) 131 diameter of dewatering orifice (in) 6.0 L 1 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 (ft) 6.50 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z 1) 2:1 tc (min) 17 slope of barrel (Sb) 0.5 % 12yr 3.20 Q 2yr 15.77 length of barrel in saturated zone (Ls) 39.8 1 25yr 4.80 Q25yr 23.65 number collars required 2 dimension of collars 4.9x4.0' principle spillway: available head (ft) 1.00 emeraencv s0illwav: YES diameter riser (in) 48 required capacity (Q25-0p) (cfs) 0.00 spillway capacity, Qp (cfs) 23.65 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) 30 head on barrel through embankment (ft) 6.75 crest of spillway (ft) 726.50 diameter of barrel (in) 18 I Sediment Basin 'D' Design 0 Q O MIN.Y WTHOUr CREST OF EMEP,GENIX \ - i I 1 U SPILLWAY \\ J drainage area (acres) 6.14 DESIGN HIGH WATER basin volumes: (using 2' contour intervals (25-YR STORM ELEYJ elevation (ft) contour area (sf) volume Icy) D.S. -POWELLS CREEK o = � Z MW. T.D• W 695.00 2960.0 0 RISER CREST PROPOSED CONSERVATION EASEMEN WITHIN EASEMENT TO REM I C) 1 696.00 3681.0 122.7 REMAIN T • DRr •STORAGE DEWATERING UNDISTURBED & TO BE LOCATED OUTSIDE THE LIMITS OF DISTURBANCE._ i � 698.00 5217.0 450.E - _ EASEMENT PREVENTS FUTURE DEVELOPMENT, DISTURBANCES &SITE CLEARING Q 700.00 6881.0 897.3 • WET • STORAGE `: I - / 1 W 702.00 8672.0 1472.1 Uj W SEDIMEM CLEANOUT POINT W (•TO 34 C.Y./ ACCRE) REDUCE) Ul RE) � 06 VJ GRAPHIC SCALE W (D 2:wet storage: wet storage required (cy) (67*DA) 411.4 design high water (ft) 700.75 20 0 To 20 40 so dewatering orifice elevation (ft) 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 cleancut (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) I> 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, Qp (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 2 U, (T1 z o Q cl� JLU LU � W J�cl� w Q J O CL O N 0 O w a � JOB NO. 182154 SCALE 1"=20' SHEET NO. 1 12 Summary of Sediment Basin Subareas SB B SB C SB D ESC Phase 6.92 8.12 6.05 ESC Phase II 7.83 10.95 6.14 ESC Phase III 7.81 9.66 4.35 Sediment Basin 'B' Design drainage area (acres) 7.83 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume (cy) 740.00 1487.0 0 742.00 2573.0 148.5 744.00 3932.0 387.7 746.00 5543.0 736.9 748.00 7402.0 1214.7 750.00 9513.0 1839.6 wet storage: wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> V) dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of fiepble tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) 12yr 3.80 Q2yr 25yr 5.60 0 25yr principle spillway_ available head (ft) diameter riser (in) spillway capacity. Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) SEDIMENT BASIN'B' DETAIL SCALE: 1"=20' PROPERTY LINE, TYP. T NksiiiIi: __ - - - -1 524.6 744.78 524.6 262.3 742.95 1.8 524.6 747.33 530.0 6.0 8.0 0.45 12 13.39 19.73 1.00 48 19.73 72 122.50 9.46 18 MIN 1'WI SPILLWAY CREST OF EMERGENCY 2' WITHOUT SPILLWAY DESIGN HIGH WATER I ­16.t25-YR. STORM ELEV.) O.S. MIN. 1.0' T-----� -- RISER CREST DRY ' STORAGE DEWATERING DEVICE WET S RAGE dp 3 R»)� SEDIMENT CLEANOUT ROINT C W STORAGEREDUCED A TO 3design high water (ft) top of dam (ft) top width of dam (ft) bottom of basin (ft) approx bottom dimensions: upstream face slope: downstream face slope: baffles: length of flow, L (ft) effective width, We (ft) L I We (baffles not required if > 2) collars: depth of water at spillway crest (ft) slope of upstream face (Z:1) slope of barrel (Sb) length of barrel in saturated zone (Ls) number collars required dimension of collars emergency spillway: required capacity (025-Qp) (cfs) bottom width (ft) slope of epst channel (fbft) minimum length of e)at channel (ft) crest of spillway (ft) 748.33 450.00 10.0 470.00 34'x45' 3:1 3:1 YES 48 141 0.3 YES 7.33 3:1 0.5 % 52.35 2 4 6'x4.6' YES 0.00 25 22 6 748.33 SEDIMENTTRAP 'B'DETAIL SCALE: i"=2o' `44- - PROPOSED SAFETY FENCE, INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT" - - 734� - - - X `34 Go Aft PROPOSED ROCK WEIR OUTFALL / (WIDTH =17.6')- Sediment Trap 'B' Design drainage area (acres) (<3) 2.93 trap volumes: elevation (ft) area (sf) volume(cf) volume(cy) 728.00 1478.0 0 0.0 730.00 2317.0 3,764 139A 732.00 3317.0 9,368 347.0 734.00 4460.0 17,117 634.0 wet storage wet storage required (cy) (67*DA) 196.3 oottom of stone weir (ft) 730.55 wet storage provided at this elevation (cy) 196.3 slope of wet storage sides 2:1 Jry storage: Jry storage required (cy) (67*DA) 196.3 crest of stone weir 733.0 Jry storage provided at this elevation Icy) 294.5 slope of dry storage sides 2:1 } / 10 1 PROPOSED 6' (MI ) W TOP OF DAM. TOP OF DAM ELEVA N=734.0'. PO STREAM BUFFER, TYP. ` / STING ioo-YR FLOODPLAIN PER go HEC-RAS ANALYSIS PERFORMED BY COLLINS ENGINEERING IN APRIL zoig, SEE WPO 201900027. 1 I'l VARM OWOIlA_ CREST OF STONE WEIR y ABA• GROUND \ l 1.0• DRY STORAGE - R'. VARMffiE WET STORAGE I.. ED) ICIER CLOTN pNCINAI GROUND MN.. -SEE PGTE 3.13 1 COARSE AGGREGTE" CU I R~ weir length (ft) (6xDA) 17.6 bottom of trap elevation (ft) 728 bottom trap dimensions: 27k83' top of dam elevation (ft) 734 top width of dam (ft) 6 top trap dimensions 51'x130' LSEDIMENTTRAP'A' DETAIL TH ijjl SCALE: 1"=20' _- - / PROPOSED R CK WEIR OUTFALL EX. DI TOP-447.83 SCOTT R. LINS2� (WIDTH=13.2') Q,. Ilk U No. 95791 112�1 `0 12/9/20 ' I P - - x _ - x 7 IONAL $�Dl x PR POSED SAFETY FENCE, INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT" x� 0 5 Jt) ° 7 748 1 n 0 ST \A 75 6 1 - 1 1 46 -748I 'A0 k X LJ 750.5 ^ w v=) a x_ x - PROPOSED 6' WIDE TOP OF DAM. N 0 z TOP OF DAM ELEVATION=75o.50'. �, > Ln >ui Sediment Trap 'A' Design drainage area (acres)(<3) 2.2 trap volumes: elevation (ft) area (sfl volume(cf) volume(cy) 746.00 1800.0 0 0.0 748.00 2656.0 4,428 164.0 750.00 3640.0 10,699 396.2 750.50 3906.0 12,585 466.1 wet storage: wet storage required (cy) (67*DA) 147.4 bottom of stone weir (ft) 748.00 wet storage provided at this elevation li 164.1 slope of wet storage sides 2:1 dry storage: dry storage required (cy) (67*DA) 147.4 crest of stone weir 749.5 dry storage provided at this elevation (cy) 174.3 slope of dry storage sides 2:1 OR4NAI. GROUND CREST OF STONE WEIR VARIPDI£' yam,°R1i• 10 DRY STORAGE VMI°DL[• WET STORAGE ♦' MAX (IXGVAh ) CLOTH OWGIRAL Gu `iETER N. -SEE PUTS 3.13-1 CGRSE AGGREGATE CUSS I RIPRAP weir length (ft) (6xDA) 13.2 bottom of trap elevation (ft) 746 bottom trap dimensions: 24x75' top of dam elevation (ft) 750.5 top width of dam (ft) 6 top trap dimensions 42x93' / - GRAPHIC SCALE 20 - �JJ 0 10 20 - - 4 - so % ( IN FEET) 1 inch = 20 " ft. PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION i - WITH FILTER FABRIC UNDERLAYMENT (L=8', Wi 3', W2=9', D=18") STR B-107 (12" HOPE). THE OPENING FOR THE 12" / STR B-110 HDPE SHALL BE TEMPORARILY BLOCKED WITHIN THE �. VDOT MH-1 MH TO PREVENT RUNOFF FROM ENTERING THE LEVEL SPREADER & CONSERVATION AREA. TEMPORARY STR BLOCKING SHALL BE REMOVED AT THE TIME SB B IS B-111 - CONVERTED TO A PERMANENT FACILITY. (12" HOPE) / STR B-108 I / VDOT MH-1 3� i1 ,.. 1 8 103 (18 HDPE) STRB_109 11IIIIIIIIIIIIIN 2HDPEi ` STR + - STR B-101 (18" HDPE) del r ' � i ti X � PROPOSED x 3 + _ �SQ� "VDOT STD. EW-i WPO STREAM BUFFER, TYP. r g yp �o PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET Fill - C) PROTECTION WITH FILTER FABRIC UNDERLAYMENT - - - - - L-i Wr W2- D=i&' / e / Y / - TO PREVENT FLOTATION THE RISER X PROPOSED FLAT LEVEL SPREADER'B'. LS TO HAVE A 12" DEEP PLUNGE POOL & BASE SHALL BE FIRMLY EMBEDDED 6" % 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT CL. At RIPRAP LINING AND A SLOPED - / / � INTO AN 18" THICK REINFORCED >.o' WIDE TOP OF DAM MIN.. VDOT CL. At RIPRAP LINED EMBANKMENT DOWNSTREAM FROM THE � s CONCRETE FOUNDATION THAT IS _ RIGID LIP EXTENDING TO T 8'x8', AND BURIED BELOW GROUND. 75 ELEV.=75o.00' FABRIC UNDE B HE EXISTING GRADE ALL RIPRAP TO INCLUDE FILTER r., RLAYMENTS& EAMIN. OF18" � _ o / x✓�� 1 NOTE: SEE SWM PLAN FOR DESIGN INFORMATION AND PROFILES ,, EXISTING loo-YR FLOODPLAIN PER OF THE BASIN OUTFALL SYSTEM AND LEVEL SPREADER. / _ _ - - - / � PROPOSED 25' WIDE VDOT CL. Al RIPRAP LINEHE BY COLLINSNALYSIS PERFORMED D _ BY COLLINS ENGINEERING IN EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & APRIL zoi9, SEE WPO zoig000z7. ; FILTER FABRIC UNDERLAYMENT (STONE - DEPTH-i8"). SPILLWAY CREST ELEV =748.33'- - - - CONSERVATION EASEMENT. AREA _ WITHIN EASEMENT TO REMAIN UNDISTURBED & TO -- / PROPOSED / BE LOCATED OUTSIDE THE LIMITS OF / E. EASEMENT PREVENTS FUTURE WE REEK - - DEVELOPMENT,DCDISTURBANCES &SITE CLEARING. CD �`� PROPOSED SAFETY FENCE, / INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT" 75g\ � PROPOSED WOODEN BAFFLES ' TOP ELEV.=747-83 i 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 SSA ` CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM ELEVATION OF 747.33' SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE A PERMANENT TRASHRACK & A TEMPORARY 06" DEWATERING ORIFICE (INVERT ELEVATION OF 744.78'). ONCE THE SITE IS STABILIZED AND THE ESC INSPECTOR HAS APPROVED THE CONVERSION OF 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. j STR B-104 B VDOT Ml STR B-102 ' VDOT MH-1 1� L9 z� r ti CM r:'O z N M v J N CL C)(7) � J N W N � > LU zw o J I� J ®r ~ 0 L U u" I L F- c1) z O T Z0� WU I LU Y z � LU 1 1 1 0 H ■Lu U U) UlU) ck. 06 LU z zLUI) F z 0 JLU((Lu J w Q J C) 0 CZ) N U r w a ul JOB NO. 182154 SCALE 1"=20' SHEET NO. 13 — iv V `[ / V � SC©TT R. LhINS�Z - / - - U No. 35791 b 12/9/20�� IONAL / J / TimiF W �S'� — �— — --� - RUP - / ` ❑ u : ram_ Opp ` / ! tom, !/ > > 100 1 � W w *00 iIce T TAL Tc= 0.22 hrs. A V 1 1 - _ ,». ! I .rJ' ` �•/�. V % / 100 OF OLZ wl d ELEV=5' V(Tc-0.1 � .-� �..� TOTAL Tc- 0.27 1❑ OF EV-5' c \ - '1 F� / : - - - j ',00' OF OLF w/ d ELEVL 4` - CONC. FL W w EL ':\025 OF CHNL SLOW 5-fi s\(Tc� 0.0\ 6�iN�s. (Tc=0.25 hrs) -- ,. - — — / ) �,... ti - `:❑ \l' \ ❑ o 400 OF CONC. FLOW uv/ d \ � -� ( � �r �, �\ .>_r ��:.: r � � r CF k V=32 (Tc=0.02 hrs. ' .� / � \ , A � � ❑� '' -- Fri -\ - ., "-�e_ /E ` .y • - - / SUBAREA-D \(THIS PLAN) < TOTAL Tc= 0.18 hr . 0��,1-D� w/ d ELEV-6'; (Tc=014 rs) � � - i _ \ ;� ,• / i _ 535' OF l)YVC FLOW w/ d ELV=40' (Tc�O.rirs " ' — _ -,- ,r / %/. ! '\ I / / J / // // // i "� .- CN=61 - T.%/� \ - % ' / i _ \ \; \� o �/-,,.-'/ � \ \ Tc=0.27 hrs. � / "s i / � / i N � \ � w r� Q SUBAREA C / n Tc= O1 ❑ '� (THIS PLAN) / / ❑/ /I\ \ F OL w/ F EV=q - / \ 0 / / // / / PHASE I SUBAREAS A & B 16\hrs) -\ _ =- ,.�-- _ ,.r / / / j - i' ?/ C0163 - _ / - - /j /❑ / / / j f� j 12.68 ac. coNC. FLow w/ d ELEv=3o' (Tn=o 02 nr5) / ;� �. - � ❑ -- - � Tc-0.22�hrs.- — L9 �TF11S PLAN) 41* - - 797aC. /' / �� / /� , -�� / /N — /, M 0.%Nor- '--" _ - / A TC=18 hrs." - r i - / - ' ' j 0CY '/l'� i i ❑ CN / \ 1 LOCATION OF APPROVED PHASE I N LEVEL II BIORETENTION BZ ASIN J i -100 * / r/ \ 1 _ a T, a LU v \AVA\�AA�\�\VAS oo \�vv\�V❑ RAMBLING BROOK LANE Q I \ � / � �� �- T �/-- � --_-_ --- _ - - �>�❑-' � / � \AAA\A\V❑�T❑ ,v- SUBAREA ❑�\❑VA\ V❑ �_ c 1.10 a & / \ Q — o LU ❑vv �v�❑ v - — �oNtu LEVEL LU LU TION 6f PR - 1 sI I 1 I 1 1 1 I❑VA VAA�� - . B_IORET NTIQ_N BASIN/ r UJ U) 0 4 // A W LU W o z CD Lu LD WATERSHED SUMMARY FOR SUBAREA B L \ \ / , ✓ "� O Area, 1-year Flow, 2-year Flow, 10-year Flow, \ N — — CN aImpervious Area Summary O \ v DAB (Pre-Dev.) 64 7.9 cfs cfs cfs 7 4.31 7.75 19.90 \ \ \ Existing Res dences Subarea B37,600 sf ❑ [ ❑ \ \ Existing Roads 11,925 sf WATERSHED SUMMARY FOR SUBAREA C 49,525 sf E::] 9 - CN Area, 1-year Flow, 2-year Flow, 10-year Flow, I \ ✓ \ / \ \ / Impervious Area Summary a General Construction notes for Stormwoter Mana ement Plans ac. cfs cfs cfs \\ l\ /\ Ln 1. All dams and constructed fill to be within 95% of maximum dry 1 \ /\/� /Pre -Development Subarea JOB NO., density and 2% of optimum moisture content. All fill material to DA C (Pre-Dev.) 63 9.01 3.86 7.43 19.61 Existing Residences 26,800 sf 182154 1 be approved by a geotechnical engineer. A geotechnical engineer is Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 to be present during construction of dams. Pre-Dev. Subarea Post-Dev. Subarea Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection Existing Roads 18,450 sf SCALE 2. Pipe and riser joints are to be watertight within stormwater WATERSHED SUMMARY FOR SUBAREA D p y p y 45,250 sf management facilities. 1"-100' 3, For temporary sediment traps or basins which are to be converted CN Area, 1-year Flow, 2-year Flow, 10-year Flow, 1 1 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.b (10-yr Post-Dev. Flow < 10-yr Pre-Dev. Flow) N/A since Section C.2.b is met Impervious Area Summary to permanent storuntil t a site management facilities; conversion is not ac. cfs cfs cfs 2 2 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 (Cutfalls to mapped Floodplain) Pre -Development Subarea C SHEET No. to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. DAD (Pre-Dev.) 61 4.79 1.29 2.58 8.32 3 3 Section 6.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined within BMP &pipes) Section C.3.c (Outfalls to mapped Floodplain) Existing Residences 12,125 sf 14 I Li SCOTT R. LLINS�Z — / 12/9/20 �SSIONAL Ell / -- - -- -- \ —-- -- --_� - A - 1 -- ---- _-� \ \ '--__�1 -- --- ---- o�NAM n Emo momi ��.VqPEW- - - — - J — a ,= / I � , - ♦ � �,,� � - I -_ ,_;- � ,. - � .. -FUTURE PHASE III LAYOUT &GRADING ARE - / / i \ ,\ , ♦ ♦ __ONCEPTUAL SHOWN. THESE ITEMS ARE Z Q 000 ,OVIDED TO DEPICT THE PHASE III SWM O 100 '.EDIT PROVIDED WITH THIS WPO PLAN., LU i ♦ ♦ _/ —-�` / Y ce \ ' / - ♦ 100' OF OAF w/ A ELEV=5' (Tc-0.15 hrs' \00 OF CON, . FL W w LEV 5' c 0.01)Hr OQ25' OF CHNL R,LDW 8 s '(Tc-0.3 hrs.) - - �U� ,_.,.. �-� . _ �, 1 ^ - 1 _ � 1 = _ 1`. '\ n'; �. \ - O y TOTAL D.23 �hks. / Q ' \ �\ ..OF OLF f A ECF'V=3=( - - _0 - - / ' .,' � ....-' ■ 225 OF C NC. FL'0W-w/ &LEV=11' 02 ®.1_0 ft/s (Tc=0.02 hrs) - SUBAREA � �' `: ,- �� i -' ■ - � -I - a� ' I (THIS PLAN) � �-- - �� ! SUBAREAD PLA -- -- A _ TC=0.19 hr§ a -: t - / -, _- 4.79ae. / 10 A' w/ d ELEV=6 , (Tc=0.1 300 OF OP1C!FLOW w EL -V=2 Tors . ,�- _ ';.� ,, ,, -. _:. I. _- L.., ;� _ .;��� F Tc=0.23 h l l- N V\ \ w CD / 625 OF CHNL. FLOW. 1O ft� 0.0 hr --� A. - 1 ' I _ ,✓ I p p SUBARE PHASE I SUBAREAS A 12.68 aC. I / A Tc 0 L�llrs. \ , I r L9 __A GO co too , - - / r J — P / r --_� _//,/ p W no — — -- �LOCATION OF APPROVED PHASE I N \ � �,- _ �� • I " �_F� � ��= - -- ,-�. - �. � - - - _ II BIORETENTION BASIN ^ Q All 11J > J " I1 I po°oo - "le i' � J LL ( J ao" — - LU CO H1 __ - peppeq�o0000e0p \ / / _ 1 NN �. � — — �- _� VA V� V \ V � / 8 ...:�Uj LU \\\\\ - /1 W L9 RAMBLING BROOK LANE -� OJ < Z SUBAREA A Q T c LU _ ^'a000000eeoo \ \ A LULU 1 --LN TION 6PPR OADLEVEUj L III 11 I +E u' BIORET NTI N_BASINYEj i 0 0 Ul U7 LU LU Z W �- - < CL LU LU Q LU 0 QUANTITY) - STORMWATER MANAGEMENT (WATER NARRATIVE: \ - / / I / 1 ' 1i, (D /� \ OVERVIEW: /�y ` � O l /" \l"'� �� LD - - THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM REQUIREMENTS.. CHANNEL C)J / & FLOOD PROTECTION COMPLIANCE ARE MET IN ACCORDANCE WITH MINIMUM 9 VAC 25-870-66 — WATERSHED SUMMARY FOR SUBAREA B i / / 0 0 REQUIREMENTS. PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR _ ADDITIONAL DETAILS PERTAINING TO THIS PLAN's STORMWATER QUANTITY COMPLIANCE. CN Area, 1-year Flow, 2-year Flow, 10-year Flow, ❑ ❑ - ac. cfs cfs cfs WATER QUANTITY SUMMARY \ \ THE VAST MAJORITY OF THIS PLAN's PROPOSED DEVELOPMENT IS CAPTURED VIA STORMWATER CONVEYANCE DA B (Post-Dev.) 73 7.97 1.76 3.97 15.96 y� \ SYSTEMS. THE PROPOSED STORM SEWER SYSTEMS DISCHARGE INTO THREE PROPOSED STORMWATER / \ ❑ -- - -'D' / 0 ❑ ❑ FLn I 1 n MANAGEMENT FACILITIES, EACH OF WHICH HAS A CONCENTRATED OUTFALL. SWM FACILITY 'B' ATTENUATES RUNOFF FROM SUBAREA'B', SWM FACILITY 'C' ATTENUATES RUNOFF FROM SUBAREA C. AND SWM FACILITY ATTENUATES RUNOFF FROM SUBAREA'D'. CHANNEL AND FLOOD PROTECTION ANALYSES WERE PERFORMED AT ALL THREE OF THESE FACILITIES' CONCENTRATED OUTFACES. FROM A CHANNEL PROTECTION STANDPOINT, ALL THREE STORMWATER MANAGEMENT FACILITIES ARE COMPLIANT WITH 9 VAC 25-870-66 SUBSECTION B.3.a (ENERGY BALANCE) AND THE LIMITS OF ANALYSES 1 STOP AT THE SWM FACILITIES SINCE SUBSECTION B.3.a IS MET.. FROM A FLOOD PROTECTION STANDPOINT, WATERSHED SUMMARY FOR SUBAREA C LCN DA C (Post-Dev.) 75 Area, ac. 9.01 1-year Flow, cfs 1.40 2-year Flow, cfs 10.11 10-year Flow, cfs 22.22 Impervious Area Summary Post -Development Subarea B Proposed Roads Proposed Sidewalk 15,075 sf 5,025 sf Impervious Area Summary Post -Development Subarea C Proposed Roads 35,150 sf Proposed Sidewalk 13,975 sf . Impervious Area Summary Post -Development Subarea D Proposed Roads 18850 sf Proposed Sidewalk 7275 sf 0 a w _ cn JOB No.. 182154 YARD DRAIN NOTES: 1 1. FINAL DESIGN (ELEVATIONS, DIAMETERS, SLOPES, etc.) OF YARD DRAINS WILL BE PROVIDED WITH THE FINAL SITE PLAN. _ 2. ALL ROOF DRAINAGE SCHEMATICALLY SHOWN WITHIN POST -DEVELOPMENT SUBAREAS B, C & D DRAINING TO SWM FACILITIES SHALL BE PIPED DIRECTLY TO YARD DRAINS, OR SHEET FLOW TO INLETS, AND SHALL BE DETAINED VIA THE PROPOSED SWM FACILITIES. SUBAREA'B' IS COMPLIANT WITH 9 VAC 25-870-66 SUBSECTION C.2.b (10-yr PEAK POST-DEV. FLOW < 10-yr PEAK PRE-DEV.. FLOW). AND BECAUSE SUBSECTION C.2..b IS MET, THE LIMITS OF FLOOD PROTECTION ANALYSIS ENDS AT SWM FACIUTY'B'. FOR SUBAREAS 'C' AND 'D', FLOOD PROTECTION COMPLIANCE WITH 9 VAC 25-870-66 IS MET VIA SUBSECTION C.2.a (CONFINES THE 10-yr POST-DEV. STORM EVENT WITHIN SWM FACILITIES 'C' AND 'D' AND THEIR OUTFALL PIPES). THE FLOOD PROTECTION LIMITS OF ANALYSES FOR SWM FACILITIES 'C' AND 'D' IS SET BY SUBSECTION C.3.c (THE SWM FACILITIES 'C' AND 'D' OUTFALL TO A MAPPED FLOODPLAIN OR OTHER FLOOD -PRONE AREA). WATERSHED SUMMARY FOR SUBAREA — CN DA D (Post-Dev.) 79 Area, aC. 4.79 1-year Flow, cfs 0.30 2-year Flow, cfs 5.23 10-year Flow, cfs 16.35 Proposed Driveways Proposed Residences Existing Residences Existing Roads 9,495 sf 34,500 sf 37,600 sf 11,925 sf Proposed Driveways Proposed Residences Existing Residences Existing Roads 14,310 sf 55,775 sf 26,800 sf 7,750 sf Proposed Driveways Proposed Residences Future Roads Future Residences 11,475 sf 9675 sf 14650 sf 38825 sf SCALE 1-100' SHEET NO. 15 113,620 sf 153,760 sf 100,750 sf STORMWATER MANAGEMENT WATER QUALITY NARRATIVE: ' /\ _ - ` _ \- - POST -DEVELOPMENT SWM WATER QUALITY PLAN: SCALE S"=100' 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 PERFORMED TO ENSURE COMPLIANCE AS A WHOLE WAS MET. PLEASE SEE THE ATTACHED STORMWATER \ MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS PERTAINING TO THIS PLAN's WATER �\ THE TOTAL ESC LIMITS OF DISTURBANCE \ QUALITY COMPLIANCE. ` BOUNDARY, AREA=32.04 acres, IS USED FOR THE - / _-w_w TOTAL VRRM BOUNDARY FOR WATER /QUALITY = WATER QUALITY SUMMARY / Q \ THE BOUNDARY FOR THE TOTAL LIMITS OF DISTURBANCE ASSOCIATED WITH THE CONSTRUCTION OF PLEASANT GREEN (i.e.. PHASES 1-3 &THE CONNECTOR ROAD WAS USED FOR THE BOUNDARY FOR THE , VIRGINIA RUNOFFREDUCTION METHOD's WATER QUALITY CALCULATIONS. THIS BOUNDARY, MINUS THE - __ - -- / 000 OFFSITE IMPACTS TO AN EXISTING SWM FOREST &OPEN SPACE EASEMENT THAT WAS MITIGATED UNDER A 000 SEPARATE WPO PLAN, RESULTS IN AN OVERALL REQUIRED PHOSPHOROUS REMOVAL RATE 24.20 Ibs/yr. 000 THIS PHOSPHOROUS LOADING WAS MITIGATED THROUGH THE IMPLEMENTATION OF MULTIPLE BEST p MANAGEMENT PRACTICES. 000 I %- PHASE I WPO 201900003 HAS BEEN APPROVED WITH A PROPOSED LEVEL II BIORETENTION BASIN TREATING SUBAREA E. PHASE I ALSO UTILIZED THE BEST MANAGEMENT PRACTICE OF PURCHASING ' NUTRIENT CREDITS, THE CONNECTOR ROAD (WPO 201900027) ALSO PROPOSES A LEVEL II BIORETENTION BASIN TREATING SUBAREA A. THIS PLAN, WHICH ENCOMPASSES PHASES II AND III, TREATS SUBAREAS B, C 0 & D THROUGH THE BEST MANAGEMENT PRACTICE OF RELEASING SHEET FLOW RUNOFF TO A CONSERVED COPEN SPACE (VA DEQ SPECIFICATION #2). A BREAKDOWN OF EACH BMP AND ITS REMOVAL RATE PROVIDED n IS SHOWN ON THIS SHEET. AFTER THE IMPLEMENTATION OF THE ABOVE BMPs, A TOTAL PHOSPHOROUS REMOVAL RATE OF 27.83 Ibs/yr IS PROVIDED (20.86 Ibs/y REMOVED + 6.97 Ibs/yr NUTRIENT CREDIT PURCHASE). THIS IS A SURPLUS OF / 3.63 Ibs/yr (27,83.24.20). ALSO, 86% OF THE REQUIRED PHOSPHOROUS REMOVAL RATE IS TREATED ONSITE AND EXCEEDS THE MINIMUM 75% THRESHOLD. \L♦ = �' ' \ ' i V I i VA t SUBAREA C d / n \ U W- IRE PHASE III LAYOUT & GRADI % NG ARE r CONCEPTUAL SHOWN, THESE ITEMS ARE -i - PROVIDED TO DEPICT THE PHASE III SWM ° CREDIT PROVIDED WITH THIS WPO PLAN. / q �f J, / I' 1-4'� SUBAREAD I - \Li� �-L? a m x v WATER QUALITY GROUND COVER SUMMARIES,/ / / / fz- - . • - -- _ :✓ «•�� ' i N -SUBAREA E APPROVED LEVEL II BIORETENTION BASIN u l \ / \� / ✓ y/ - ._ � .-°�� _ - __ - _ Phase I LI1711ts Of Disturbance 13.15 ac. _ -� �- .. \ � ':� - !-/ (ASSOCIATED WITH PHASE I, WPO 201900003) COVERED UNDER SEPARATE PLAN Connector Road Limits of Disturbance 1.90 ac. V ----- Phases II & III Limits of Disturbance not Previously Covered 16.99 ac. �j _ �r Permit �_- � � - - - -/a d , %/ I. - - Total Limits of Disturbance = 32.04 ac. - - • �' ��� _APPROVED LIMITS OF DISTURBANC o - -�� (ASSOCIATED PHASE I, WPO 201900003) & F (Used for VRRM Water Quality Boundary) \ rn : - \'• -PROPOSED LIMITS OF DISTURBANCE a ( SSOCIATED WITH THE CONNECTOR ROAD, WPO O ti PROPOSED LIMITS OF DISTURBANCE � / \` � ,.'� _- _ (ASSOCIATED WITH THIS PLAN) NOT � �, ,:/ - - _ Approved Phase I Impervious Areas- Soil Type B 4.55 aC. -�- \ i ""`,.opB°° ' °° °^a � - e ` _ - )- COVERED UNDER SEPARATE PREVIOUSLY COVERED UNDER A Connector Road Im revious Areas- Soil Type A 0.51 ac. 01900 27 C RATE PLANS SEPARATE PLAN % / _ - - Yp Phase II Impervious Areas- Soil Type B 6.63 ac. \w o suBAREA A - - - __ Phase III Impervious Areas- Soil Type B 1.90 ac.°° - - - - - - - - L9 ' /r � � Y '. : ,��_. A\ /a -' ✓ .' .-. v �� p - I oo �aooa000'a° A - - / r Total I rvous Areas = 13.59 ac. - - - m e - -- - - / Managed Turf Areas Within LOD- Soil Type B 17.06 ac, ManagedTurfAreasWithinLOD-SoilTypeA 1.39 ac. \`\��\\\ \ ¢ - MATCHLINE, SEE - �. TotalMana Managed 1839 ac \\\\\\\\\\ \ THIS SHEET - 7 �I I I I+, � 1 I fl r� Q QUALITYPLAN" "�I=1 MATCHLINE SEE C I � I I � � I I I � - \- PRE -DEVELOPMENT SWM WATER QUALI SCALE 1'-100' Go I co THIS SHEET- - - " ' -_-- - \ THE TOTAL ESC LIMITS OF DISTURBANCE _ / /_ / - \ - -, =_ /, CN ® J °°°° BOUNDARY, AREA=32.04 acres, IS USED FOR THE //S'='` �. / / - W \ oOO " oppp° oCJOq`aeeoo oeooaee°o 000000 / - - NI y\ y TOTAL VRRM BOUNDARY FOR WATER QUALITY - _ �'' / / J //' \ ,\ D CNJ SUBAREA A i � / I � .' '� / - _- - , .- � � ., � , �., . A� / / y� - �� t - 9 , / V / LU LU woo _j woo woo L CA ON OF P OPO ED L EL / r %/ r� \ 1 . / / / J \ ,._ _ �' , \ \ __ `\..\. \ / �� / T.L.) W Z BIORE EN ION BASIN (A S0( TED WI ///G/ ( _i/ - /,. ,. - - / \ / i - / / / - \ \ / J ) \ \\ z i \... \\ \� Uj �( THE C NN R OAD WPO 201 02) � � � \ �� , RE TE ED UNDER SEPARATE PLA /- I = - - ,' ^ ^ _ - v APPROVED LIMITS OF DISTURBANCE d n/ I (ASSOCIATED PHASE I, WPO _24-t96A00J) & % � _ /,' \ / \ �_ /� _ � I- -.' _ (�`- � / / �- '. \ Q �' _/ � I \� / / / `\ PROP SED LIMIT�DEREPA] BANCE ,%__ - �✓ .��'`' // - \ J % / ) '„ \� (A OCIAT D WITH THROAD, WPO -- / \ \, . - / y-\/'� _ / i / / / / \ -" - / / I / / ',,-\�\'\: / f / r Q z 201 002COVEREDRATE W O/ \ LU .f rLU //,� /� \ / / /. ✓ / // ��( �? i� ��'� / / i� / / / �- �, / -l( ( / d / Ill ['- ` LU Q LnW LU LU LU z Q �.y/ _ ^r L.T. - LU SUBA APPROVED LEVEL II BIORETENTION BASIN SUMMARY OF PHOSPHOROUS REMOVAL RATE REQUIRED \ /s (ASSOCIATED WITH PHASE I, WPO 201900003) O �,� / / Total Phosphorous Removal Rate Required for Proposed Pleasant Green Phases I, II, III and the Connector Road 24.57 Ibs/yr COVERED UNDER SEPARATE PLAN O CN i \ / /\� / / / / ° �\ / j / / Portion of Phosphorous Removal Rate Provided (By Others) for Connector Road's Impacts to SWM Forest &Open Space Esmt. 0.37 Ibs/yr 0 / q p Total Phosphorous Removal Rate Required for the Proposed Pleasant Green Developer 24.20 Ibs/yr APPROVED LIMITS OF DISTURBANCE �- i ---- / (ASSOCIATED PHASE I, WPO 201900003) & / J � SUMMARY OF PHOSPHOROUS REMOVAL RATE PROVIDED ----PROPOSED LIMITS OF DISTURBANCE PROPOSED LIMITS OFDISTURBANCE Approved Phase I (WPO 201900003) Phosphorous Removal Rate Achieved from Nutrient Credits 6.97 Ibs/yr q' ��� ' (ASSOCIATED WITH THE CONNECTOR ROAD, WPO *{ASSOCIATED WITH THIS PLAN) NOT Connector Road (WPO 201900027) Phosphorous Removal Rate Achieved from Level II Bioretention Basin (Subarea A) 1.17 Ibs/yr o.° o � 01900027) COVEREDUNDERSEPARATE PLANS ^ w COVERED UNDER A e - -- --- ' O w PREVIOUSLY PLAN J L. Proposed Phosphorous Removal Rate Achieved from Phase II's Outfall to Conserved Open Spaces (Subarea B) 6.07 Ibs/yr ` , e°°° emg° °°°° t S ° d, ; - \ _ - a cn Propose Phosphorous o d from Phase II s Outfall to Conserved Open Spaces (Subarea C) 7.6 Ibs/yr ° - oeee EA A - - - - JOB NO. d P r s Removal Rate Achieve Proposed Phosphorous Removal Rate Achieved from Phase II & III s Outfall to Conserved Open Spaces Subarea D 4.60 Ibs/yr � °°° s� BAR - - /' Approved Phase PO 2019000 Phosphorous Removal Rate Achieved from the Level I I Bioretention Basin bares 1 42 I r I W 03 P os h n Su E bs r SCALE 4 / - 1 p w`. , 1 -100 Total Phosphorous Removal Rate Provided 27.83 Ibs/yr ° -- -- MATCHLINE, SEE - /� - - SHEET NO. \ Total Phosphorous Removal Rate Provided Onsite 20.86 Ibs/yr S SHEET \ J " - -- - _ - - / Percentage of the Required Phosphorous Removal Rate Treated Onsite (20.86 / 24.20 x 100) 86 % °� r• _ THIS _ H E E r! 16 SCOTT/R. Cb`LLINSZ No. 35791 1�1 P 12920 4 0 ti s � s � r E 0 NAL _ \,\ v / z Z o \�\ C � a U w co m n � a �..� o U) z W w STORMWATER MANAGEMENT FACILITY 'B' DETAIL, SCALE 1"=30' / 75 'SEE THIS SHEET FOR r 2 4 � SCALED PROFILES OF PROPOSED BASIN'S FLOORS ALL BE SH ALL � THE SWM FACILITY TYP. '-I - SLOPED ODRAIN TO THE RISER o. %MIN _ - \ 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 zB° �^ I SERVE AS THE RISER's LOWER SECTION, IN CONJUNCTION WITH THICK REINFORCED CONCRETED `� - ��. THE PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" % FOUNDATION THAT IS 8'x8, - - - - - - / - 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-&ACCESSESMT. I/�� 745.67'. CONTRACTOR SHALL PERMANENTLY PLUG ANY EXISTING Oj - f- - TEMPORARY ESC DEWATERING ORIFICES WATERTIGHT AT THE TIME OF THE FACILITY's CONVERSION. ALL ORIFICE OPENINGS SHALL- S HAVE STATE APPROVED TRASHRACKS, TYPICAL. SEE THE DETAILS , ON SHEET 18, ORE QUIVALENT, FOR ADDITIONAL INFORMATION, u pe y PROPOSED 1o' WIDE GRASS LINED, GRADED SWM ACCESS 2% MAX. CROSS SLOPE) PROPOSED 25'WIDE VDOT >?XRIPRAP LINED EMERGENCY SPILLWAY w/.4:1SIDE SLOPES&FILTER FABRIC �> k �I �e�\ �` ✓ UNDERLAYM ENT (STONE DEPTH=18"). 1o'WIDE TOP SPILLWAY CREST ELEV.=74833ELEV.=75o.00, i STR B-102 I \\ C -- _ EXISTING 100-YR FLOODPLAIN PER HEC-RAS ANALYSIS PERFORMED _-- .\ \ \ S -S �\ \4 BY COLLINS ENGINEERING IN APRIL 2019, SEE WPO 201900027. -. - WPO STREAM �. BUF}'ER, TYP. \ 3+00 41 STR B-104 \ PROPOSED STR B-107, A 012" LOW -FLOW OUTFALL CARRYING THE TREATMENT VOLUME- " FLOW TO LEVEL SPREADER'S' (75.5LF OF 012" HDPE @ 1.00% (II=736.37, IO=735.61) PROPERTY LINE.. i TYR. , DES STR B 108 VDOT MH-I \ RIM=739.50 PROPOSED FLAT VDOT CL. AI RIPRAP LINED OUTLET PROTECTION WITH ) \\\\\ _ FILTER FABRIC UNDERLAYMENT -- (L=15', W1=4.5, W2=7.5', D=zB') r 3+75 i \ \ PROPOSED 82' LONG FLAT LEVEL SPREADERS'. LS TO HAVE A 12" DEEP PLUNGE POOL & 6" WIDE RIGID LIP. LS \ \ TO INCLUDE AVDOT CL. Al RIPRAP LINING AND A SLOPED \\ _ S (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM FROM THE RIGID LIP EXTENDING TO THE ® ` - EXISTING GRADE. ALL RIPRAP TO INCLUDE FILTER FABRIC \1 \ I\ \ UNDERLAYMENTS &BEA MIN. OF 18" DEEP. L`. STRB-109 65.45 LF OF 012" HDPE @ 0.909/b (1I=735.51, IO=734.92) / STR B-110VDOT MH-1 / RIM=737.00 / STR B-111 j 1.90 LF OF 012" HDPE @ 3.680/0 - ( (II=734.82, IO 734.75) / is PROPOSED VDOT STD. CLASS AI RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (L=8', W1=3', W2=9', D=iW) \ 734.75- BEGINNING OF LEVEL SPREADER 4 733.5- BOTTOM OF LEVEL SPREADER / ✓ 734.5- TOP OF LEVEL SPREADER h / \ PROPOSED 5o'x68' CONSERVATI1� ` EASEMENT. AREA WITHIN EASEME 68 734.0 / TO REMAIN UNDISTURBED &TO BE 733 8 \ice 1>4 0 LOCATED OUTSIDE OFTHE LIMITS OF / DISTURBANCE. EASEMENT PREVENTS j ( \ FUTURE DEVELOPMENT, i CP DISTURBANCES & SITE CLEARING. 733.0 \\ • 732.4 11 SCALE 1"=30' CONTRACTOR SHALL CALL THE COUNTY INSPECTOR& ENGINEERING DEPARTMENT 24-HOURS BEFORE ANY :'- ANTICIPATED CONSTRUCTION ACTIVITIES FOR THE BMPs-THIS / i - ISINCLUSIVEOFWHENTHEUNDERGROUNDDETENTION SYSTEM SUBGRADE IS READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. \ \ x\\ \ 012 , NV. 719.66 - PROPOSED UNDERGROUND DETENTION SYSTEM TO ATTENUATE RUNOFF _ CAUSED FROM THIS DEVELOPMENT. SEE THIS SHEET & SHEET 1g FOR DETAILS. _ \ It --\/ 0120" INV. 719.45' \i.012 „ INV 719.42' RESTRICTIVE STEEL WEIR PLATE,ATLOW POINT, TO / ' DRAIN THE SYSTEM. SEE DETAIL ON THIS SHEET. / PROPOSED STR. C-io1, A LOWER 018" LOW -FLOW OUTFALL - CARRYING THE TREATMENT VOLUME FLOW & SMALLER STORM EVENTS (26.92LF OF 028" HDPE @ 3.31%, 11=719.40, 10 718,51) \ / PROPOSED 75'LONG FLAT LEVEL SPREADER'C'. - �., LS TO HAVE A1z"DEEP PLUNGE POOL &6"WIDE / RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP LINING AND A SLOPED 3' (MIN.) VDOT CL. Al / RIPRAP LINED EMBANKMENT DOWNSTREAM FROM THE RIGID LIP EXTENDING TO THE EXISTING / i - GRADE. ALL RIPRAP TO INCLUDE FILTER FABRIC /,: / j I UNDERLAYMENTS & BEA MIN. OF i8" DEER / 2 717.4 PROPOSEDVAR. WIDTH / / �"r ,cl SWM&.ACCESS ESMT.. / 716.0 EXISTING 100-YR FLOODPLAIN PER \ HEC-RAS. ANALYSIS PERFORMED \- /- BY COLLINS ENGINEERING IN APRIL 2019, SEE WED 201900027, \ / 170 \ ✓ W \ V S -105 . PROPERTY LINE, TYP. LA 'It (N)'I SEE THIS SHEET FOR SCALED PROFILES OF \ THE SWM FACILITY TYP. +©© 12&x INV. 71969 ` 0 INV. 72578' /N PROPOSED ACCESS MH w/ STAIRS FOR INSPECTION & J MAINTENANCE, TYP. ACCESS MH TO BE LOCATED UPSTREAM & DOWNSTREAM FROM RESTRICTIVE WEIR PLATE AND NEAR THE F/ -\.• INFLOW POINT ATTHE HIGH END OF THE SYSTEM, AS SHOWN. 39.00 LF @ 0.5% �. R/�� •�� �� of �. \ _ O, 0120" INV. 719 86' x©' / \` \ , PROPOSED ROADWAY&SI DEWALK TO _ •L PROVIDE ACCESS TO SWM FACILITY. s \ 0120" INV. 719.65 \�. \. i / PROPOSED STR. C-iog, AN ELEVATED 018" HIGH -FLOW BYPASS OUTFALL CARRYING LARGER STORM EVENTS (29.57 LF OF 028" HDPE dal 22-95%, 11=726.00, 10=719.51) s PROPOSED STR. C-1oj,A0iz"LOW-FLOW OUTFACE CARRYING '•\ THE TREATMENT VOLUME FLOW TO LEVEL SPREADER'C' "T - (i2.00 LF OF 022" HDPE @ 0.5%, I1=718.41, 10=718.35) \\ C PROPOSED VDOTSTD. CLASS Al RIPRAP LINED OUTLET PROTECTION \ • �\ s WITH FILTER FABRIC UNDERLAYMENT (L=8', W1=3', W2=9', D=18') 718.35- BEGINNING OF LEVEL SPREADER \ `717.1- BOTTOM OF LEVEL SPREADER 718.1 TOP OF LEVEL SPREADER \ C_1 PROPOSED 5o'x75' CONSERVATION EASEMENT. AREA WITHIN EASEMENT TO REMAIN UNDISTURBED & TO BE ' i1 + 0 PROPOSED VARIABLE WIDTH LOCATED OUTSIDE THE LIMITS OF SWIM & ACCESS ESMT. / �r DISTURBANCE. EASEMENT PREVENTS 10 \ / WPO TR FUTURE DEVELOPMENT, I, / BUFFER, TYP. DISTURBANCES & SITE CLEARING. �\ PROPOSED FLAT VDOT CL Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT(L=28', W1=4.5', W2=12.7, D=18") m.�. GENERAL SWM NOTES: i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON SHEET 18, OR EQUIVALENT, FOR INSTALLATION. 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH 3.14 SPECIFICATIONS. 3 CONTRACTOR SHALL HIRE A THIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING AND RIPRAP AND THE REMAINING DISTURBED EMBANKMENT SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ME, CL SC OR GC SOILS & BE FREE OF WOOD, ROOTS ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM 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 INS PECTIONS ONS THEREAFTER. INSPECTIONS SHALL INCLUDE THE FOLLOWING AT MINIMUM: 1. 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. 765 760 A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH 048") SHALL SERVE AS THE RISE�i'S 760 -OW€R-SECTION, IN-CONJUNCTION-N/ITkNTH€-PROP - EINFORCE- - CR€T€- FOUNDATION. A 048" STANDPIPE ITH A RIM ELEVATION OF 747.33' S HALL COMPLETE THE TRUCTURE. RISER TO INCLUDE (1) ONE PEIZMANEN I 06" LO,gv,-FLOW RIFICE WITH AN INVERT ELEV.-739.75, AND (4) FOUR PERMANENT 12" MID-FItOW ORI ICES WITH INVERT ELEVAI IbINS OF 745.67'. CONTRAC R-SHALL P NTLYPLUG -EXISTING TEMPORARY ESC DEWATERING ORIIFICES WATERTIGHT AT THE STATE TIME OF THE FACILITY'S TRASHRACKS, 755 CONVERSION. ALL ORIFICE OPENINGS SHALL HAVE AP ROVED 755 TYPICAL SEE THE DETAILS ON. SHEET 18, OR EQUIVALENT F R ADDIII IONAL INFORMATION. PROPOE..l1ED DAM EL�75o.0 io' WIDE TOP OF (MAXIMUM CRO S SLOPE OF 20/0). CONTRACTOR SHALL INSTALL 750 EMBANKMENT IN ACCORDANCE w/ THE DESIGNS_S OWN ON SHEET 18. ��I STR. E -102 IOPOSEDIFLAT q: V p VDOT MH-1 VDOT CL. Al RIPRAP- LINED O TLET PROTECTION WITH RIM=7.8.1° FILTER�FABRIC UNDERLAYMENT (L 1 ', W1=4.5', W2-7.5', D=18") 745 - P OPOSED 745 GRADE 100-yr PEAK WSE=748.82 - 10-yr PEAK WSE=747.35 - STR. B-104 2-yr PEAK WSE-745.99 VDOTMH-i 1-yr PEAK WSE-744.98 - -I EXIST[ RIM=.42.00 GRADE 740 �� \ 740 0. PROPOSED BASIN'S FLOOR SHALL - BE SLOPED TO DRAIN TO THE RISER (o.5% MIN..) WITH POSITIVE SLOPES THROUGHOUT. S R B-101 122.5 LF OF 018" HDPE 735 @ 0.50% (II=739 48, IO=738.87) 735 TO PREVENT FLOTATION THE RISER BASE SH ILL BE FIRMLY STR B-103o 88.9 LF OF 018" I IDPE @ PROPOSED STR. B-1o5, AN I EMBEDDED 6" IN O AN z8"THICK REINFORCED CONCRETE 0.50 (II=738.77, IO= 3833) HIGH -FLOW BYPASS CUTE/ FOUND TION THAT IS 8'x81, AND BURIEDBEL W GROUND. A VDOT ES-i (46.33 LF OF 0 PROPOSEDE TR B-10 A 012" LOW -FLOW OUTF NEE CARRYING HDPE @o.5o%, 11=738.23, 10: THE TlEATMEI T VOLU E FLOW TO LEVEJ SPREADER'B' 730 (75.SL OF 012' HDPE Co 1.00% (II=736.- 7, IO=735.61) 730 J W co[D I 0) O O O 00 00 CD ri � j � LnO c(o6 robLuco ^ bn rl r n f` r PROPOSED Oi2o" CMP UNDER DETENTION SYSTEM 10-yr PEAK WSE= 2-yr PEAK WSE= 1-yr PEAK WSE= PROPOSED STR, C-zog, A HIGH -FLOW BYPASS OL LARGER STORM EVENTS HDPE @ 21,95%, 11= PROPOS' OUTFI FLOW & SQ PROPO: TI 0+50 1+00 1+50 2+00 2+50 3+00 3+50 3+75 SWM FACILITY B SECTION 745 7 5 740 740, XISTING- GRADE 735 735 GROUND 4T o.5o% 730 111 730 -PROPOSED WEIR PLATE SE THIS SHEET& SHEET 2E.FOR DET ILS. 729.98 726.78 725.96 - STIR C-104 VDC T MH-2 725 RIM=725-75 725 4 ELEVATED 018" PROPOSED O G ADE TFALL CARRYING \ STR. C-102 (29.57 LF OF 018" �� VDOT MH-i 726.00, 107719.51) RIM=724.00 720 719.42 719.40 -D STR. C-103, A LOWER. 018" LOW -FLOW _ ,LL CARRYING THE TREATMENT VOLUME TALLER STORM EVENTS (26.92LF OF 018" HDPE @ 3,31%, 11=729.40, 10=718.5i) ° 71 5 ;ED STR. C-io7, A 012" LOW -FLOW OUTFALL CARRYING I TREATMENT VOLUME FLOW TO LEVEL SPREADER'C PR POSED TR. C-103, AN - (12.00 LF OF 012" HDPE Qa o.5%, II=718.41, 10=71835) 01_H_IGH_F OW BYPASS LF OF 018" OUTFALL (65!oo HE PE @ 4.45%, 11=719.41, 710 10=71 6.52) 7101 W W c0 LO N c0 � O Ln O� r n O O W W oO � CN N n r r- n r\ W U_ PROFILE SCALES 1-5' (V) 1'=50'(H) 0+50 1+00 1+50 2+00 2+25 SWM FACILITY C SECTION 718" ,LL V 18" '738. PROPOSED 25 WIDE VDOT CL Al RIPRAP LINED EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & FILTER FABRIC UNDERLAYMENT (STONE DEPTH=18"). SPILLWAY CREST ELEV.=74833'. 755 1 755 1o' WIDE TOP OF DAM ELEV-=750. ',TYP. 750 750 /ITH 1 ROOTS D `EXI TING _ 2b G 0O) GRADE ADE 745 745 �J . O O . O W W O m O ItO W r h Ili 0+50 0+75 PROFILE SCALES I SWM FACILITY B SPILLWAY 1'=50-(H) 0120" WEIR PLATE DETAIL NOTE: SCALE: s"=5' WEIR PLATE TO BE SECURELY BOLTED, OR SIMILARLY FASTENED; TO THE DETENTION SYSTEM. 9,54' OVERFLOW WEIR IS HYDRAULICALLY EQUIVALENTTO AN ORIFICE WITH AN APPROX. DIAMETER OF 026.53" INSTALL TRASH RACKS ON ALL ORIFICES, TYP. SEE THIS SHEET FOR DETAIL, OR EQUIVALENT. 'ROPOSED FLAT VDOT CL. Al RIPRA -INED OUTLET PROTECTION WITH =1LTER FABRIC UNDERLAYMENT [L=28', W1=4.5', W2=12.1, D=18") PROPOSED STR. C-ios,. AN 018" HIGH -FLOW BYPASS )UTFALLWITH A VDOT EW-1 (21.25 LF OF HDPE @1.98%, 11=716.42, 10=716.00) MANUFACTURE / INSTALL ONE (1) 05" LOW -FLOW ORIFICE IN THE STEEL WEIR PLATE AT THE LOW POINT OFTHE DETENTION SYSTEM (INVERT ELEVATION 719.42') ELEV.=729.42' (TOP OF PIPE; NFORCED 12 GA. STEEL PLATE ELEV.=719.42' (BOTTOM OF F SCOTT/R. CULLINS," No. 35791 !b. 12920 4 0 s ti s � r E 0 NAL - Z z O O a ca m w U) n � a O z umi W " c\j w < Zw J J 0 Lu 0 zJ 2 W Y W ITIM, LU Z Lu U) AM z Ln W H� W w Q ,wn 2 z z � W W LU ^� Q V � i i z O' �/'�/� u V/ W J ri W a In JOB NO. 182154 SCALE AS SHOWN SHEET NO. 17 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; VI RGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VI RGIN IA 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. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION POND IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN 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 FACILITYWILL 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 REQ UIREDTOTHE DESIRED SUB -GRADE. 5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OFTHE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALLAREAS 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 Test Method Unit grecificationiiiF Permeability ASTM D-2434 Cmrsec 1 x 1 Plasticity Index of Clay ASTM D423/424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less Oran 30 Clay Particles PassrV ASTM D-422 % Not less than 30 Cla Com anion ASTM D-2216 % 95%of staMad Proctor dens Source: vlrginla 51ormwaler Management FlanaDDOlt 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 OFTHE BASIN. 10. CONTRACTOR SHALL THEN CONSTRUCTTHE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION IF APPLICABLE. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 13. THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, IF APPLICABLE. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BYTHE CONTRACTOR IN THE FIRSTYEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN. 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc. 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 7. INSPECT CONDITION OF ALL TRASH RACKS REVERSE SLOPED PIPES OR FLASHBOARD RISERS AS APPLICABLE FOR EVIDENCE OF CLOGGING LEAKAGE DEBRIS ACCUMULATION OR OTHER FAILURES. 8. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER EROSION OR SLUMPING. 10, OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN s ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION 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) StormRaxTII ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD W INCH RACK SHOWN DIMENSIONS IN INCHES (OR EQUIVALENT) PLAN StormRaxTM Round Series for Concrete Manhole ►art Na. Dim UMB DIMc Min ID Mlnoo RS-24 17ye 14H 1 n 24 30 RS36 21 14 1 0% 36 43 111 27 It 1 54 . 46 57 Rs30 27% lay. 1 6614 60 70 Plastic Solution, Inc. CUSTOMER PO Box 4386, Wlndlcsta, VA E2600 M m6cchee Rd. Nllnchester, VA 72603 877) 877-5727 phone PROW. 1540) 722.2219 (u htlP/ verse PI-Ic-soWdnn.lsln XpPE nRVLNPN. PUr11C9Y PLWTM:90lU'k1N& MG ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTION$ CROSS BRACING FOR OVERHANG HDPE ANTkVORTEX PLATE DATE: OPAWN BY.' APPD M: DUAL 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 W ITH 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 MI., 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 OFTHE 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 construction record drawing be prepared by someone other than the designer. Please do not 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 am 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. 15. Manufacturers certifications for proprietary BMII certifying proper installation and functioning. s 1 '' zinc Jared h ale I. I P o al ter F.etl with 0; B fastener • ® ®`ly 2-1,'e" din. holes Y®/® n(DO a (r/ ��® ®Q1 Isometric t e t/4' HDPE plate (optional) culvert elm r NDPr et. rat plastic with 0 2-7/8' holes and 114' plate manufactured by OO 'IaeUc 00 3olutians Inc. rr equal 000 M.0000 •:.�.,.:I.,A.y. ,t14 +e/'�tiy - 04 • shown with optlanel plat. n•r✓.�. AYa: a I HDPF .•enml.ural plastic a !., 2-1/8" holes and 114_plMl- .�.CCttGIl enanafactured by Plastic 5/8' din hole 0 0 o o OO 0 0 sin le 81.IP R Elevation orl!wc PLASTIC DEBRIS CAGE P Q. Box 4380 SOLUTIONS rincnrew Yt 82W4 INC. 877-877-6727 rrr.plepic-rulwoecam SECTION A-9: TIPIC.AL G&APffiCAI. DETAII.S Harrogrrrrout 21 4' min "t Cut off trench-4' below suitable I material $DR or rock L - _ _ - -------� TYPICAL HOMOGENEOUS EMBANKMENT l.9arnd orouA SI-t o 5 Perforated collector Foundation drain FOUNDATION DRAIN drein Sdrd, gravel or rod. ,74/4f0N Outlet 4Transitkm filter CHIMNEY DRAIN Transition FLIT -Rock or gravel Blanket drain BLANKET DRAIN Rock or gravel Iltain 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 PLUNGE POOL RIPRAP APRON - �6' REATED ,t X TIMBERS OR -. CONCRETE LIP . . �' - •_� LENGTH OF LEVEL SPREADER QO% ) 11 LIP TO BE 13AGED ON DES;GN FLOW - ,II 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 1,11,011ML)RBED E:ePTINO 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 Ill 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 Cons Open Space 5 11KIvIVVA I tK MAIN AU L lvI L IN I I-AIL1L11 Y 'U' Ut I AlLr SCALE 1"=30' T- \ ' EXISTING 100-YR FLOODPLAIN PER r HEC-RAS ANALYSIS PERFORMED BY COLLINS ENGINEERING IN APRIL \ ti.� 2019, SEE WPO 201900027) 1 PROPOSED zo' WIDE GRASS LINED GRADED SWIM A ACCESS11 1 PROPERTY LINE, TYP.-1 r � (z%MAX. CROSS SLOPE) PROPOSED VARIABLE WIDTH` 11 SWM &ACCESS ESMT. Y 1I ( �SEETHIS SHEET FORD+OO SCALED PROFILES OF 'C. THE SWM FACILITY TYP. I I / _., PROPOSED zo' WIDE VDOT CL. Al � RIPRAP LINED EMERGENCY SPILLWAY ) w/ 4:1 SIDE SLOPES & FILTER FABRIC 1^� UNDERLAYMENT(STONE DEPTH=IB"). ' SPILLWAY CREST ELEV.--700.7S'. ,I � PROPOSED 1o'WIDE TOP OF p 50 DAM ELEVATION=702.0' (WITH A MAXIMUM CROSS SLOPE OF 2%). I _ U PROPOSED SWM FACILITY'D' RISER (STR. D-100). SEE PROFILE ON THIS SHEET FOR DESIGN INFORMATION. p TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY EMBEDDED6"INTOAN28"THICK REINFORCED CONCRETE FOUNDATION THAT IS 8'x8', AND BURIED BELOW GROUND. y i 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. 1 \\ I PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (o.5%MIN.) WITH POSITIVE SLOPES THROUGHOUT. _ T _ PROPOSED FLATVDOT CL. Al RIPRAP LINED BOO - RD"� )'¢O. '\ OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (L=9; Wi=6', W2=6', D=18") .0 / Cf0 j IJIL- PROPOSED 6 LONG FLAT LEVEL SPREADER 0 - _ 4' F:. PROPOSED 01z"LOW-FLOW OUTFACE CARRYING THE 'D'. LS TO HAVE A 12" DEEP PLUNGE POOL & W-� TREATMENT VOLUME FLOW TO LEVEL SPREADER'D' 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT J (55.25 LF OF 012" HOPE QB o..5o%, 11=694.84, 10=694.73) L II=11 CL, Al RIPRAP LINING AND A SLOPED 3'(MIN.) % e VDOT CL. Al RIPRAP LINED EMBANKMENT PROPOSED VDOT STD. CLASS Al RIPRAP LINED OUTLET PROTECTION DOWNSTREAM FROM THE RIGID LIP / WITH FILTER FABRI YMENT = - - = III I- C UNDERLA L 8' W1- ' W2- ' D-18" ( 3, 9, ) I=1I -I EXTENDING TO THE EXISTING GRADE. ALL �' _T RIPRAP TO INCLUDE FILTER FABRIC _ �L UNDERLAYMENTS & BE A MIN. OF 18"DEEP. O � 694.73- BEGINNING I-111- / -694.0 1 1 OF LEVEL SPREADER _ Tlllll / 693.8 �" /� r / O `�t 693 5 BOTTOM OF 693.0 11 O LEVEL SPREADER i LLL1111- WPO STREAM PROPOSED So'x64' CONSERVATION /- f �(O 694.5- TOP OF ` ° BUFFER --T_P. II III EASEMENT. AREA WITHIN EASEMENT ./ M LEVEL SPRE ADER ! F TO REMAIN UNDISTURBED &TO BE � LOCATED OUTSIDE THE LIMITS OF �,. �Q)- DISTURBANCE.EASEMENTPREVENTS � FUTURE DEVELOPMENT, 692 4I) / O PROPOSED 100-YR FLOODPLAIN PER HEC-RAS i DISTURBANCES & SITE CLEARING. -ri / ANALYSIS PERFORMED BY COLLINS ENGINEERING \ \ ITII Z, IN APRIL 2019, SEE WPO 201900027) 1 ETIN1 Ill- W 1H 11 710 PROPOSED 1o' WIDE TOP OF DAM ELEVATION=702.0' (WITH A MAXIMUM CROSS SLOPE OF z%). 705 CONTRACTOR SHALL INSTALL- EMBANKMENTIN ACCORDANCE w/ THE DESIGNS SHOWN ON THIS SHEET. 700 EXISTINI GRADE 695 PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT(L=9', W1=6', W2=6', D=18") 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. ROPOS ❑ 705 GRADE TO-PREVENTFLOTATION THE RI PROPOSED 20'WIDE VDOT CL. Al BASE SHALL BE FIRMLY EMBEDDED RIPRAP LINED EMERGENCY SPILLWAY 1 6" INTO AN18"THICK REINFORCED 100-yr PEAK WSE=700.91 wl 4:1 SIDE SLOPES&FILTER FABRIC \ CONCRETE FOUNDATION HAT IS 10-yr PEAK WSE=700.28 UNDER LAYM ENT (STONE DEPTH=28"). 1 8'x8', AND BURIED BELOW C ROUND. I 2-yr PEAK WSE=699.99 SPILLWAY CREST ELEV,=700.75'. 1-yr PEAK WSE=699.74 700 705 705 PROPOSED STR. D-ioi, A HIGH -FLOW BYPASS 24" HOPE OUTFALL WITH VDOT ES-2 (48.66 LF 690 OF 024"HOPE Cal o.5o%,11=696.24, 10=696.00) o' WIDETOPOFDAM ELEV.y02.00', TY.P. v' PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (0:5%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=694.94). STUB PIPE PROPOSE TO INCLUDE A TRASH RACK AT THE UPSTREAM ORIFICE OPENING. '� GRADE I 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 6951 LjjJ Co CO r7 Ih N 00 cc J O LLI W L6 to N CD uj cc Lri CT) d' (A 0) CI) (7) O) w CO cD CO CO to CO 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 WCD N N 0 O 11 O W Lt.CD 0+50 SWM FACILITY D SPILLWAY SCOTT/R. CULI No. 35791 12/9/20 1SIONAL Ei Z N M co co 1 W N N W N LU J J T1 ZUj LU L L jUj J< P-M z 0. G I� V / I� Uj II 11 2!W LU U Q� f�y V LU 21. 1 Q z � W Q� Uj W 1^� Q V I- Cz`' o J UJI w ri a ur) JOB NO. 182154 SCALE AS SHOWN SHEET NO. 18 HUGGER SINGLE BAR, BAND FLAT GASKET BOLT AND STRAP (SBBS) �lil'�il''�I l' j'llil IIII FLAT GASKET CONNECTION DETAIL (SBBS) 2 2/3"xl/2" RE -ROLLED END HEL-COR PIPE GENERAL NOTES: 1. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26.4.2.4. 2. BAND MATERIALS AND/OR COATING CAN VARY BY LOCATION. CONTACT YOUR CONTECH REPRESENTATIVE FOR AVAILABILITY. 3. BANDS ARE SHAPED TO MATCH THE PIPE -ARCH WHEN APPLICABLE. 4. BANDS ARE NORMALLY FURNISHED AS FOLLOWS: • 12" THRU 48" 1-PIECE • 54" THRU 96" 2-PIECES • 102" THRU 144" 3-PIECES 5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS. 5. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2 213"x1/2" 7. DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES. 8, ORDER SHALL DESIGNATE GASKET OPTION, IF REQUIRED (SEE DETAILS ABOVE). H-12 HUGGER BAND DETAIL NOT TO SCALE 20 MIL PE IMPERMEABLE LINER OVER TOP OF PIPE LIMITS OF (IF REQUIRED) REQUIRED BACKFILL g127YP. 36" TYP. 36" SEE TYPICAL BACKFILL DETAIL NOTES z z w 0 w 75 w w a_ a TYPICAL SECTION VIEW NOT TO SCALE NOTE: IF SALTING AGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE PROJECT, A GEOMEMBRANE BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE EFFECTS THAT MAY RESULT FROM A CHANGE IN THE SURROUNDING ENVIRONMENT OVER A PERIOD OF TIME, PLEASE REFER TO THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL INFORMATION. f+TRENCH CONDITION EMBANKMENT CONDITION - FINAL BACKFILL 7 5a 5 BEDDING FOUNDATION 4 INITIAL BACKFILL INITIAL FILL ENVELOPE DIAMETER MIN. COVER CORR. PROFILE 6"-10" 12" 1 1/2" x 1/4" 12"48" 12" 2 2/3" x 1/7 54"-96" 12" 3" x 1", 5" x 1" 102"-144" D/8 3" x 1", 5" x 1" BACKFILL REQUIREMENTS FOLLOW THE GUIDELINES OF AASHTO LRFD BRIDGE DESIGN (SEC 12) AND CONSTRUCTION (SEC 26) 1 MINIMUM TRENCH WIDTH MUST ALLOW ROOM FOR PROPER COMPACTION OF HAUNCH MATERIALS UNDER THE PIPE. THE MINIMUM TRENCH WIDTH (12.6.6.1): PIPE 5 12": D + 16" PIPE > 12": 1.51D + 12" 1a MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE (12.6.6.2): PIPE < 24": 3.OD PIPE 24" - 144": D + 4'0" PIPE > 144 D + 10'0" 2 THE FOUNDATION UNDER THE PIPE AND SIDE BACKFILL SHALL BE ADEQUATE TO SUPPORT THE LOADS ACTING UPON IT (26.5.2). 3 BEDDING MATERIAL SHALL BE A RELATIVELY LOOSE MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, AND A MINIMUM OF TWICE THE CORRUGATION DEPTH IN THICKNESS, WITH THE MAXIMUM PARTICLE SIZE OF ONE-HALF OF THE CORRUGATION DEPTH (26.3.8.1, 26.5.3). 4 CORRUGATED STEEL PIPE (CSP / HEL-COR). 5 HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION (26.5.4). 5a INITIAL BACKFILL FOR PIPE EMBEDMENT TO MEET AASHTO A-1, A-2 OR A-3 CLASSIFICATION, OR APPROVED EQUAL, COMPACTED TO 90% STANDARD PROCTOR (T 99). MAXIMUM PARTICLE SIZE NOT TO EXCEED 3" (12.4.1.2). ALL LIFTS PLACED IN A CONTROLLED MANNER. IT IS RECOMMENDED THAT LIFTS NOT EXCEED AN 8" UNCOMPACTED LIFT HEIGHT TO PREVENT UNEVEN LOADING, AND THE LESSER OF 1/3 THE DIAMETER OR 24" AS THE MAXIMUM DIFFERENTIAL SIDE -TO -SIDE (26.5.4). 6 INITIAL BACKFILL ABOVE PIPE MAY INCLUDE ROAD BASE MATERIAL (AND RIGID PAVEMENT IF APPLICABLE). SEE TABLE ABOVE. 6a TOTAL HEIGHT OF COMPACTED COVER FOR CONVENTIONAL HIGHWAY LOADS IS MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT OR TOP OF RIGID PAVEMENT (12.6.6.3). 7 FINAL BACKFILL MATERIAL SELECTION AND COMPACTION REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER THE ENGINEER OF RECORD (26.5.4.1). NOTES: • GEOTEXTILE SHOULD BE CONSIDERED FOR USE TO PREVENT SOIL MIGRATION INTO VARYING SOIL TYPES (PROJECT ENGINEER). • FOR MULTIPLE BARREL INSTALLATIONS THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE PIPE DIA.J2 BUT NO LESS THAN 12", OR 36" FOR PIPE DIAMETERS 72" AND LARGER. • CONTACT YOUR CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING (TABLE C12.6.7-1). TYPICAL BACKFILL DETAIL NOT TO SCALE TEMPORARY COVER FOR CONSTRUCTION LOADS HEIGHT OF COVER CONSTRUCTION LOADS FINISHED GRADE FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRA AMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER THE TOP OF THE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. THE USE OF HEAVY CONSTRUCTION EQUIPMENT NECESSITATES GREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE COVER MINIMUMS FOR NORMAL HIGHWAY TRAFFIC. AXLE LOADS PIPE SPAN, INCHES (kips) 18-50 1 50-75 1 75-110 1 110-150 MINIMUM COVER (FT) 2.0 2.5 12-42 48-72 3.0 3.0 78-120 3.0 3.5 126-144 3.5 4.0 "MINIMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL COVER REQUIRED TO AVOID DAMAGE TO THE PIPE, MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO THE TOP OF THE MAINTAINED CONSTRUCTION ROADWAY SURFACE. CONSTRUCTION LOADING DIAGRAM NOT TO SCALE 36"0 MAX AHS-25 ACCESS CASTING yTH OFF WITH GRADE RINGS AS REQUIRED, TO REINFORCING TABLE v BE PROVIDED AND INSTALLED BY "'BEARING O CONTRACTOR. MAY BE TOP MOUNTED 0 CMP CMP (AS SHOWN) OR RECESSED. of A B0 REINFORCING PRESSURE PROTECTION w RISER (PSFj SCOTT R. LLINS'.� SLAB RIM/FINISHED -- -_ - 0 a GRADE VARIES U No. 35791 N 4'0 45 @ 10" OCEW 2,540 ° ` e I • - a j 24" 4'x4' 26" #5 @ 10" OCEW 1,900 .orpo 12/9/20 ,cy4 o ¢--- o-`'�'-�--"`�`'-J-ems- a F �'t o---' S G11 ° 4'-6"0 #5 @ 10" OCEW 2,260 S1 ONAL V� ° 30" 4'-6" x 4'-6" 32" #5 @ 9" OCEW 1,670 ,� 5'0 #5 @ 9" OCEW 2,060 GASKET MATERIAL 0 CMP RISER ¢ 36" 5' x 5' 39" #5 @ W OCEW 1,500 SUFFICIENT TO PREVENT a --- SLAB FROM BEARING ON p 42 5'-6"-x 5'-6" 44 #5 @ 8" OCEW 1 370 RISER TO BE PROVIDED BY CONTRACTOR. 01311"TYP. < 0)6'0 #5 @ 7" OCEW 1,210 SECTION VIEW - 4a 6'x6' 50" #5@7"OCEW 1,270 ACCESS CASTING NOT SUPPLIED BY CONTECH c?. 0A ,�A 0 L� B 9 #4 DIAGONAL TRIM At BAR (TYP. 4 PLACES), SEE NOTE 7. ! OPENING IN PROTECTION ---y SLAB FOR I ACCESS I INTERRUPTED BAR SPECIFICATION FOR CORRUGATED STEEL PIPE -ALUMINIZED TYPE 2 STEEL REPLACEMENT, SEE SCOPE HANDLING AND ASSEMBLY NOTE 6. THIS SPECIFICATION COVERS THE MANUFACTURE AND SHALL BE IN ACCORDANCE WITH RECOMMENDATIONS OF THE INSTALLATION OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) THE PROJECT PLANS. UNDERGROUND DETENTION SYSTEM NOTES: INSTALLATION 1. TRASHRACKS SHALL BE INSTALLED ON ALL ORIFICES, MATERIAL INCLUDING THOSE LOCATED ALONG THE WEIR PLATE WITHIN SHALL BE IN ACCORDANCE WITH AASHTO STANDARD THE UNDERGROUND DETENTION SYSTEM. THE ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II 2. DETENTION SYSTEM's WEIR PLATE TO BE APPLICABLE REQUIREMENTS OF AASHTO M274 OR ASTM A929. OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS PRE -MANUFACTURED AND DELIVERED TO THE SITE. WEIR AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR PLATE SHALL BE BOLTED TO THE UNDERGROUND DETENTION PIPE CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE SYSTEM, OR SIMILARLY FASTENED TO ENSURE IT HAS A WITH THE SITE ENGINEER. SECURE & WATERTIGHT CONNECTION. THE CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE 3. ANY RETAINING WALLS AND FOUNDATIONS CONSTRUCTED IN APPLICABLE REQUIREMENTS OF AASHTO M36 OR ASTM A760. THE IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO THE VICINITY OF THE UNDERGROUND DETENTION SYSTEM PIPE SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. SHALL BE REVIEWED AND APPROVED BY THE STRUCTURAL THE PROJECT PLANS. ENGINEER AND A GEOTECHNICAL ENGINEER. 4. THE ADJACENT PUBLIC ROAD WILL SERVE AS ACCESS TO ALL FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE THE UNDERGROUND DETENTION SYSTEM. 5. CONTACT COLLINS ENGINEERING (434.293.3719) REGARDING UNITED STATES. ANY QUESTIONS CONCERNING THE UNDERGROUND DETENTION SYSTEM. 6. ALL FILL EMBANKMENT MATERIAL SHALL CONSIST MATERIAL SPECIFICATION PREDOMINANTLY OF SOIL AND BE PLACED IN SUCCESSIVE UNIFORM LAYERS NOT MORE THAN 8 INCHES IN THICKNESS NOT TO SCALE BEFORE COMPACTION OVER THE ENTIRE AREA IN ACCORDANCE WITH THE CURRENT VDOT ROAD AND BRIDGE SPECIFICATIONS. 7. VDOT STD. IS-1 & ST-1 ARE REQUIRED ON THE UNDERGROUND DETENTION SYSTEM STRUCTURES, INCLUSIVE V-4"� 2Yz" OF THE BYPASS STRUCTURES. B. ALL FILL SHALL BE PLACED AT 95% COMPACTION AND 1_ TESTED BY A GEOTECHNICAL ENGINEER TO ENSURE COMPACTION IS REACHED AND MAINTAINED. 4 ALL STEEL PER 9. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL Ya (#6) REBAR CAN BE CUT FLUSH - • ASTM A36 TEST -DIG AT THE EXISTING INLETS & OUTFALLS TO TO OUTSIDE OF RAIL CONFIRM THE INVERTS AND TO ENSURE THE PROPOSED (BAR LENGTH = 16Y4") OR BAR CAN 9 > GRADES CAN BE ACHIEVED. CONTRACTOR SHALL CONTACT EXTEND BEYOND RAILY't ~ FABRICATION TOLERANCE: ±Y4" COLLINS ENGINEERING OF ANY DISCREPANCIES IN THE _ o FLAT BAR AND REBAR: MILL HORIZONTAL OR VERTICAL ALIGNMENT PRIOR TO ORDERING TOLERANCEAPPLIES AND CONSTRUCTION. TYP. 10. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION INDUSTRY (29 CFR PART 1926). - 11. CONTRACTOR SHALL PROVIDE ADEQUATE STONE BACKFILL 12" TYP. 3/^ HOLE w/3/4" REBAR RUNG, FOR THE UNDERGROUND DETENTION SYSTEM PIPES IN CENTER TO CENTER WELD REBAR TO RUNG ON ACCORDANCE WITH VDOT AND THE MANUFACTURER'S RUNG SPACING `O OUTSIDE OF STEEL RAIL REQUIREMENTS. - o 21/2" x %" FLAT BAR SIDE RAIL 10 PLAN FRONT 48"0 to 90"0 FITTING REINFORCEMENT MAY BE REQUIRED BASED ON HEIGHT OF COVER AND LIVE LOAD CONDITION TYPICAL MANWAY DETAIL PLAN SIDE NOTES: 1. LADDERS CAN BE MADE IN 20'-0" STANDARD LENGTHS AND CUT TO FIT 2. ALL MATERIAL TO MEET ASTM A36 3. LADDER TO BE HOT DIPPED GALVANIZED PER ASTM A-123 AFTER FABRICATION IS COMPLETE STANDARD LADDER DETAIL NOT TO SCALE PART NO. HALAGVL16 PROVIDE MINIMUM OF 4 ATTACHMENT ANGLES (2 ON EITHER SIDE OF LADDER RAIL) TO CONNECT LADDER TO RISER EXTENSION RISER w/ LADDER AND STEPS IF EXTENSION IS REQUIRED RISER w/ LADDER AND STEPS MAINLINE CMP 2yxY2,5x1,3x1,ETC. NOTE: THIS DRAWING IS INTENDED TO APPLY TO LADDERS INSTALLED IN RISERS HAVING A DIAMETER OF 30" OR LARGER. DUE TO SPACE CONSTRAINTS AND LIMITED ACCESSIBILITY, THE PRACTICALITY AND SUITABILITY OF UTILIZING RISERS SMALLER THAN 30" DIAMETER AND/OR INCORPORATING LADDERS IN THESE SMALLER DIAMETER RISERS SHOULD BE ADDRESSED BY THE OWNER AND PROJECT ENGINEER #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), - SEE NOTE 7. 2" COVER (TYP) L �l I OPENING IN PROTECTION SLAB FOR ACESS STANDARD STANDARD REINFORCING, REINFORCING, SEE TABLE SEE TABLE ROUND OPTION PLAN VIEW NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION AND ACI 350. 2. DESIGN LOAD HS25. 3. EARTH COVER = V MAX. 4, CONCRETE STRENGTH = 4,000 psi 5. REINFORCING STEEL = ASTM A615, GRADE 60. 6. PROVIDE ADDITIONAL REINFORCING AROUND OPENINGS EQUAL TO THE BARS INTERRUPTED, HALF EACH SIDE. ADDITIONAL BARS TO BE IN THE SAME PLANE. *NOTE: WHEN RISER EXTENSIONS ARE USED, THE PLANT SHOULD CUT 3" FROM THE SIDE RAILS AS SHOWN *3" FROM BOTTOM OF LADDER I O RAIL TO RISER JOINT L *3" FROM TOP OF LADDERF RAIL TO RISER JOINT LADDERRAILS AND RUNGS (2)Y4" FILLET WELDS 1"LONG ATTACHMENT AN( L5" x 3" x Y" x 16" LONG AT V-0" MINIMUM OF 4 ANGLES F SPACING. LONG LEG TO LADDER SECTION, (2 EACH SIDE PROJECT OUT. WELD TOP LADDER) 6' MAX. SPACI V-6" AND BOTTOM OF 3" LEG TO EACH VERTICAL MAX. CORRUGATION CREST (THESE ANGLES SHOULD BE USED a_ FOR LARGER DIAMETER o_ MAINLINES WHERE ADDITIONAL STEPS ARE NEEDED) 6" FROM RUNG TO RISER JOINT 6" FROM RUNG TO RISER JOINT SECTION A -A RISER LADDER DETAIL NOT TO SCALE RISER NORMALLY CMP WITH 22/j' x Y" CORRUGATIONS (4)%q" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELD EACH SIDE) L3"x3"x%s" LONG SQUARE OPTION PLAN VIEW 7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND BARS A MINIMUM OF 12" BEYOND OPENING, BEND BARS AS REQUIRED TO MAINTAIN BAR COVER. 8. PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED BY CONTRACTOR. 9. DETAIL DESIGN BY DELTA ENGINEERS, ARCHITECTS AND LAND SURVEYORS, ENDWELL, NY. MANHOLE CAP DETAIL NOT TO SCALE (4)y6" FILLET WELDS FROM EACH ANGLE CORRUGATION CREST (2 WELDS EACH SIDE) (4)13" x 3" x 3/6" _ 5y" LONG (2)Y4" FILLET WELDS 1" LONG FROM EACH ANGLE TO LADDER RAIL LADDER RAILS AND RUNGS WWO I (4) ys" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELDS EACH SIDE)12 I L3"x3"x3/g" - --!_ SY2" LONG LADDER AND RUI VJ Zz o O a E U CO wz cn � J a 0 N FZ w uj W N Q � N �1 Lu J H _J Z ~ W Jo 0. W o v ,>o/ IL.L H1 Q H� Q W H W U) Ln W uj z [I..L W LU W 1 C) Z z 0 22 ^w o u w w O w x a Ln JOB NO. 182154 SCALE 4S SHOWN SHEET NO. 19 PLANTING SCHEME FOR EVERY 400sf (OR 20'x2O' SECTION) SHALL CONTAIN THE FOLLOWING: MITIGATION MAINTENANCE PLAN: THE WATERSIDE 50% OF THE BUFFER: AN ANNUAL INSPECTION SHALL BE CONDUCTED IN THE NON -GROWING SEASONS DURING THE FALL OR WINTER MONTHS. THE ONE (1) 11" - 2" CALIPER NATIVE CANOPY TREE OR LARGE EVERGREEN AT 6' INSPECTION SHALL TRIGGER MAINTENANCE OPERATIONS, AS REQUIRED. MAINTENANCE OPERATIONS MAY INCLUDE, BUT IS NOT LIMITED TWO (2) J"- 11" CALIPER NATIVE UNDERSTORY TREES OR EVERGREENS AT 4' OR ONE (1) NATIVE UNDERSTORY TREE AND TO, TRASH REMOVAL AND ENSURING A DENSE, HEALTHY GRASS / FOREST GROUNDCOVER. MOWING & BUSH HOGGING MAY BE ALLOWED TWO (2) LARGE SHRUBS AT 3'-4' WITHIN THE STREAM BUFFER AND MITIGATION AREAS FOR THE SOLE PURPOSES OF REMOVING OVERGROWN INVASIVE SPECIES AND FOR CLEARING THE TRAIL. HOWEVER THE MOWING & BUSH HOGGING SHALL BE LIMITED TO A MAXIMUM OF FOUR TIMES A YEAR. THE THREE (3) NATIVE SMA LL SHRUBS OR WOODY GROUNDCOVER AT 15"-18" THE LANDWARD SM THE BUFFER: CONTRACTOR SHALL CONDUCT THE ANNUAL INSPECTION FOLLOWING THE FIRST YEAR THE PROJECT IS COMPLETED, AND THE OWNER \ \`•✓3 ill '/ SHALL CONDUCT THE ANNUAL INSPECTIONS THEREAFTER. NATIVE BARE ROOT SEEDLINGS OR WHIPS AT 1,210 STEMS/ACRE, APPROXIMATELY 6' O.C. '\ F, (800 MINIMUM PLANT SURVIVAL REQUIRED AFTER TWO GROWING SEASONS) OR MITIGATION SCHEDULE: CONTAINER GROWN NATIVE SEEDLING TUBES AT 700 PER ACRE, APPROXIMATELY 5' O.C. THE CONTRACTOR SHALL SCHEDULE A MEETING ONSITE WITH THE COUNTY ENGINEER AND THE OWNER PRIOR TO ANY MITIGATION (490 MINIMUM PLANT SURVIVAL REQUIRED AFTER TWO GROWING SEASONS) PLANTINGS TO FINALIZE THE LOCATION AND QUANTITIES. IN THIS MEETING THE CONTRACTOR SHALL PROVIDE AN APPROXIMATE DATE FOR THE MITIGATION PLANTINGS, WHICH SHALL OCCUR IN THE FALL OR SPRING. PLANTINGS SHALL ONLY OCCUR AFTER INITIAL UPLAND PLANTING NOTES: 1�� // \ /! __.__ �,-✓ ,,� - `r. YID �. �\ �\ \ / ESC MEASURES ARE IN PLACE. MITIGATION PLANTINGS SHALL BE COMPLETED PRIOR TO THE FULL RELEASE OF THE MITIGATION BOND. 1. ALL MITIGATION PLANTINGS SHALL COMPLY WITH THE RIPARIAN BUFFERS GUIDANCE MANUAL BY CBLAD. �" \ 2. ALL MITIGATION PLANTINGS SHALL BE NATIVE TO ALBEMARLE COUNTY, VA. THE FOLLOWING ARE NATIVE TO ALBEMARLE COUNTY AND ARE PROPOSED WITH THIS PLAN, BUT MAY BE SUBSTITUTED WITH ANOTHER NATIVE PLANT: LIQUIDAMBAR STYRACIFLUA "ROTUNDILOBA" OR "ROTUNDILOBA SWEETGUM (CANOPY TREE) \ \ \ ✓✓✓ \ ILEX X AQUIPERNYI "DRAGON LADY" OR "DRAGON LADY" HOLLY (LARGE EVERGREEN) ACER PALMATUM OR JAPANESE MAPLE (UNDERSTORY TREE) Cis/\ �,\� MYRICA CERIFERA & CVS OR SOUTHERN WAX MYRTLE (UNDERSTORY EVERGREEN) O O/ BUXUS SEMPERVIRENS & CVS OR AMERICAN BOXWOOD (LARGE SHRUB) —3. ALL MITIGATION AREAS SHALL BE PROTECTED BY A MAINTENANCE AGREEMENT. 4. 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 I \ \ / / / \ / �- / \� \- \ - - ' / / ,, %%1 \y0 GREATER AT MATURITY, AND A SMALL SHRUB IS DEFINED AS A WOODY PLANT THAT CAN REACH UP TO 10OF HEIGHT AT STREAM MATURITY. GANOTES:URI STR R MITIGATION THE EXISTING STREAM BUFFER ON -SITE IS HEAVILY WOODED, SO TRADITIONAL MITIGATION PLANTING IMPACTS TO AC OMPLIEXISH STREAM BUFFER: PROPOSES THE FOLLOWING MEASURES TO MBE 1. THE STREAM BUFFER SHALL BE RESTORED IN AREAS ALONG POWELLS CREEK WHERE TREE COVER IS MORE SPARSE OR WHERE INVASIVE SPECIES HAVE OVERTAKEN AREAS. THE TOTAL MAXIMUM MITIGATION PLANTING AREA FOR THIS DEVELOPMENT IS 26,478sf (EQUAL TO 2x THE PROPOSED IMPACTS). MITIGATION PLANTINGS SHALL FIRST OCCUR ONSITE IN THE STREAM / I `; \ O / / - / < _ _ — _ `-� / / / ` �' ��- I / \ \ / BUFFER WHERE VEGETATION IS MORE SPARSE. IF A TOTAL PLANTING AREA OF 26,478sf CAN ! ! / / / ! y / "/ "' 1 �I., -, . , (. / �, _\\ / NOT BE LOCATED WITHIN THE SITES STREAM BUFFER WHERE AREAS ARE LESS VEGETATED, \ THEN THE CONTRACTOR SHALL HIRE AN ARBORIST TO PROVIDE A REPORT DEPICTING THE f PRESENCE, IF ANY, OF INVASIVE SPECIES WITHIN THE SITE's STREAM BUFFER. THE ARBORIST's / / \ / / ! ! / / / y / ✓ // "'�N; \ _ 1 ;' 1 `\ / ' , \ \. REPORT SHALL INCLUDE A PLAN FOR THE REMOVAL OF THE INVASIVE SPECIES AND FOR THE - / \ I / / / r + •'`\ l } \ �/y / r •"' AREAS' REPLANTING. THE REPLANTING OF THESE AREAS SHALL BE IN ACCORDANCE WITH THE 400sf MITIGATION PLANTING SCHEME SHOWN ON THIS SHEET. THE TOTAL MITIGATION PLANTINGS & REPLANTINGS AREAS SHALL NOT BE REQUIRED TO EXCEED 26,478sf. I \,� / / / ( , 2. THE CORRECTIVE MEASURES DESCRIBED ABOVE WILL RESULT IN PLANTINGS THROUGHOUT ' — \ / f /! ! - / / ` W / ,�� / \\ _ •_�_' `� `"y / ''\\ THE ONSITE POWELLS CREEK STREAM BUFFER AND WILL MITIGATE THE IMPACTS FROM THE PROPOSED CONSTRUCTION. 3. A BOND SHALL BE PROVIDED PRIOR TO CONSTRUCTION ACCOUNTING FOR THE COST OF / / ! ! — ; = — ! / / j ` • ,'/ A / / \ y V .., _ ! ,' q REMOVING THE MAXIMUM 26,478sf OF INVASIVE SPECIES AND FOR PROVIDING NEW -� MITIGATION PLANTINGS OF THE MAXIMUM 26,4785f. IN THE EVENT THE ARBORISTs REPORT � .Q ! ! � ! N �. / / --"- ✓ "� j ! I � A L ->A A V / _/ � � IDENTIFIES LESS THAN 26,478sf OF AREA AVAILABLE FOR MITIGATION PLANTINGS % REPLANTINGS, THEN THE AREA OF INVASIVE SPECIES REMOVAL AND MITIGATION-11 ,/ �y/!j REPLANTINGS SHALL BEE UAL TO THAT OF THE LESSER AREA DETERMINED BY THE ARBORIST <\ \ r ' l DUE TO THE STATE OF THE EXISTING HEAVILY FORESTED STREAM BUFFER.�/"" 1 4. THE ONSITE STREAM BUFFER's MITIGATION SHALL BE COMPLETED PRIOR TO THE FULL RELEASE / OF THE MITIGATION BOND. \ I / / ! / j " / \ / ! I ! - - I SCOTT/R. CITLLINS�Z No. 35791 pow 12/9/20� �`SIONdi, ��Gl / \ Z Z J [) Q O a .. 2: U co U m w En � J Z a / H o \ U) z WLu ce n / ✓ � / A � / / � /�i � � � �/ _ PROPOSED TRIPLE BOX CULVERT / C7) 0 T OFT PLA T j r � (N T PAR HIS N) A � � ti POWELL CREEK CROSSING WITH THE M / V y / / / \ / /� ✓ ., =-' PROPOSED RAMBLING BROOK L wj OPOrJED I PACTS \'. \ a \o oo o p LTING O o000000 0000000 / 4 z (13,2 ?F TOfi!•CL) TO THE - � � / \ � �°°°°°°°°®°° BUFFER'RESU_ o Y --' T 6A1-01-26 FROM THE PROPOSED _ - - °° °°®�a�°ao°,�. t \1 : 1 _- b 100, WPO PHASES II & III BUFFER TYP. DEVELOPMENT C\l ��LEASANT GRE PHASE„II" LHWIiFS"OF POWELLS \ ,';: � \ / , /; ' CREEK, TYP. PROPOSED IMPACTS 44,175sf TO THE WPO BUFFER (PART OF CONNECTOR \/ / //f//...�/. / Q \ /-/./ _ \/\/ / ., ` , .` ,�^�,/ dg a _ �.✓� a - - _ / ! ! !-- —_ _ROAD VSMP PLAN - WP0201900027). TS TMMOEA's IC ARE COVERED UNDER WP020900027 " " J Q d z R y v/ /ill O Q ;PROPOSED IMPACTS '� - - - � ' � V A ` /// l r J z ("13,239sf TOTAL) TO THE _ - ! - TMP-55C-03-A1� / WPO BUFFER RESULTING FROM THE PROPOSED / / ✓ / 1� i \ \ i k l\ f PHASES II &III I / / 1 O� a () 1 DEVELOPMENT r N IIDE,FINED PRESERVEDSTEOEP''S PES TO REMAIN (TYP.), f Lu Lu TMP 55C-03-A-/e // / \ \ W d ul EXISTING CONCRETE DAM PROPOSED TO BE \ \ REMOVED UNDER WP0201900027. THIS DAM's / / \ / Lu REMOVAL IS PART OF THE CONNECTOR,ROAD's \ /% WPO TREAM BUFFER i ) \ Q W MITIGATION PLAN & WILL HELP RESTORE -THE HELPNATIVEESTORE THERI STREAM OPATTERNS. THIS WILL jt RIPARIAN HABITAT THAT, _ HAS BEEN ALTERED DUE TO THE DAM CONSTRUCTION AND ALLOW AQUATIC LIFE TO TRAVEL UP AND DOWN THE STREAM BED, �y 1/ !�/i'`� \ / \ RESTORING THE NATURAL PROCESSES \ / y --- -- ;\ " / \ W CURRENTLY IMPACTED BY THE DAM. I COUNTY DEF NED PRESERVED �v_ //� - Q ui STEEP SLOPES REMAIN (TYP.) �� \V i - PROPOSE IMPACTS (13 239sf VVV` / ° �� TOTAL) TO THE WPO BUFFER 11�� v Q_ / ESULTING FROM 1�HE,PROPOSED / ® o R PHASES II &III DEVELOPMENT \ O N \ XI , NG 12' WIDE!x 8'-HIGI#\ / / j BUFF TYP. \ V v ! �- ( �� COUNTY DEFINED PRESERVED D UBLE BOX CULVERT- r �� / �� -' E - LIMITS OF POWELLS STEEP SLOPES TO RE FOWELL CREEK CMAIN (TYP.) ROSSING / 4 / WITH EXISTING CLING LANE � � / / ' �� ° �� � CREEK TYP. a I — o w TMP 55C-03.B V ,yjIMP 56-115� � � � �SCZNGP� O� a vz ��'/�\/ �I 7 / I I / / %� ✓ i�) �, f )"i V 1�� E� �. JOB NO. —PROPERTY LIMITS, TYP., � O \ � � 182154 SCALE 13 SHEET Na. 20 y /