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HomeMy WebLinkAboutWPO202100007 Plan - Submittal (First) 2022-02-07VICINITY MAP: SCALE: 1" = 2$ GENERAL NOTES OWNERS: TMP 04600-oo-oo-oi9B8 CROCKETT CORPORATION CIO HAUGH & HELVIN 435 PARK ST CHARLOTTESVILLE, VA 22903. TMP 04600-o-oo-oigB9 BROOKHILL MASTER ASSOCIATION INC 455 SECOND ST SUITE aoi CHARLOTTESVILLE, VA 22902 DEVELOPER: RIVERBEND DEVELOPMENT, INC. 455 SECOND STREET SE, SUITE 400 CHARLOTTESVILLE,VA 11903 ENGINEER: COLLINS ENGINEERING zoo GARRETT ST, SUITE K CHARLOTTESVILLE, VA 12901 TAX MAP: 04600-oo-oo-oigB8 D.B.5346, PG. 256 11g.69 ACRES (PORTION OF) 04600-oo-oo-oigbg D.B. 5512, PG. 303 50.71 ACRES (PORTION OF) ZONING: NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT (ZMA101800011 WITH PROFFERS - APPROVED BY THE BOARD OF SUPERVISORS ON JULY 17, 2029) THE CODE OF DEVELOPMENT AND AND APPLICATION PLAN FROM ZMA202500007 ARE STILL VALID AND STILL APPLY TO THE BROOKHILL PROJECT. ENTRANCE CORRIDOR OVERLAY (EC), AIRPORT IMPACT OVERLAY (AIA), MANAGED AND PRESERVED SLOPES OVERLAY DISTRICT AND FLOOD HAZARD OVERLAY FH ( ) ZONING DISTRICT. NOTE: A SPECIAL USE PERMIT APPLICATION (SP201500015) WAS APPROVED TO ALLOW THE GRADING ACTIVITIES IN THE FLOOD HAZARD OVERLAY DISTRICT (FH). THE SP WAS APPROVED ON NOVEMBER 9, 2o16 BY BOS WITH CONDITIONS. TOTAL PROJECT AREA: 04600-oo-oo-ol9138 - 1ag.69 AC. (PORTION OF) BLOCK i6 -13.84 AC BLOCK 17 -16.15 AC TOTAL =19.99 AC PROPOSED USE: 134 TOTAL DWELLING UNITS (53 SINGLE-FAMILY DETACHED UNITS, 18 SINGLE-FAMILY ATTACHED VILLA UNITS, & 53TOWNHOUSE UNITS) ALLOWABLE DENSITY: BLOCK 16: 19 UNITS (MIN.) TO 58 UNITS (MAX.) BLOCK 17: 31 UNITS (MIN.) TO 94 UNITS (MAX.) PROPOSED DENSITY: BLOCK 16: 57 UNITS BLOCK 17: 77 UNITS REQUIRED SPACE: CIVIC PARK GREEN WAY OPEN SPACE BUFFERS TOTAL GREEN SPADE OPEN SPACE PROVIDED: B16 B17 TOTAL BLOCK 16 & 17 GREEN SPACE PROVIDED: 1o.6 ACRES BUILDING HEIGHTS: NO MINIMUM HEIGHT REQUIREMENT. MAXIMUM - 3 STORIES 14o FEET SETBACKS: NEIGHBORHOOD DENSITY RESIDENTIAL- BLOCK 5TOBLOCK 1g FRONT SETBACK: 8' MIN. & 25' MAX. PORCH SETBACK: S MIN & 25' MAX. SIDE SETBACK: 5' MIN & NO MAX. SIDE, CORNER LOT SETBACK: 5' MIN. & NO MAX. REAR SETBACK: io' MIN. & NO MAX. GARAGE SETBACKS: 18' MIN. SUBDIVISION STREETS: CURB & GUTTER WATERSHED: SOUTH FORK RIVANNA RIVER AGRICULTURAL/FORESTAL DISTRICT: NONE TOPOGRAPHY & SURVEY: TOPOGRAPHY WAS COMPILED FROM SURVEY BY LINCOLN SURVEYING AND BELL LAND SURVEYS, JANUARY 2015. BOUNDARY INFORMATION WAS COMPILED BY LINCOLN SURVEYING ON MARCH 7, z015. FIELD VERIFIED BY COLLINS ENGINEERING IN SEPTEMBER OF 1020. DATUM: NAVD 1988 EXISTING VEGETATION: MOSTLY WOODED. PRESERVED/MANAGED SLOPES: PRESERVED AND MANAGED STEEP SLOPES ARE SHOWN WITHIN THE LIMITS OF THE PROPERTY. SEE EXISTING CONDITIONS SHEET FOR LOCATIONS. LIGHTING: NO LIGHTING IS PROPOSED. PHASING: THESE BLOCKS SHALL BE DEVELOPED EITHER AS ONE (1) PHASE OR A TOTAL OF (z) SEPARATE PHASES. RECREATION: TRAIL CONNECTION TO THE GREENWAY TRAILS PARKING: PARKING REQUIRED: TWO (a) OFF-STREET PARKING SPACES FOR EACH DWELLING UNIT ONE (1) ON -STREET PARKING SPACE PER EVERY 4 TOWNHOUSE UNITS = 81 ATTACHED UNITS 14 = 20.25 SPACES REQUIRED PARKING PROVIDED: TWO z OFF-STREET PARKING SPACES PROVIDED FOR EACH DWELLING UNIT TWENTY ONE (n) ON -STREET PARKING SPACES PROVIDED ALONG ROADWAYS BUILDING SITES: EACH LOT CONTAINS A BUILDING SITE THAT COMPLIES WITH THE REQUIREMENTS OF SECTION 4.2.1 OF THE ALBEMARLE COUNTY ZONING ORDINANCE. BURIAL SITES: NO CEMETERIES WERE FOUND DURING FIELD INVESTIGATION OF THESE (3) BLOCK AREAS. FLOODPLAIN: THERE IS A FLOODPLAIN LOCATED ON THIS SITE. FEMA MAP ID 51003Co28oD DATED FEBRUARY4, zoos. IN ADDITION, A DAM BREACH INUNDATION ZONE EXISTS ON THE PROPERTY FOR THE SOUTH RIVANNA DAM, WHICH IS A FEDERAL DAM LOCATED UPSTREAM OF THE PROPERTY. LANDSCAPING: A LANDSCAPING PLAN WILL BE PROVIDED WITH THE FINAL SITE PLAN IN ACCORDANCE WITH ALBEMARLE COUNTY ORDINANCE SECTION 32.7.9. STREET TREES ARE INCLUDED WITH THE LANDSCAPING DESIGN TO INCORPORATE STREET TREES EVERY So'ALONG THE ROADWAYS. LAND AREAS: OPEN SPACE: 1o.6o ACRES (35.34%) LOTS: 11.93 ACRES (43.n%) ROW DEDICATION: 7.63.ACRES (25.38%) PROPOSED IMPERVIOUS AREAS: ROADS & SIDEWALKS: 145,725 sf BUILDINGS, WALKWAYS & PATIOS I DECKS: 176,690 sf DRIVEWAYS: 4&600 sf TOTAL IMPERVIOUS AREAS: 468,o15sf (10.74ac.) RETAINING WALLS: RETAINING WALLS ARE PROPOSED WITH THIS PROJECT. SEE GRADING & DRAINAGE PLAN FOR WALL LOCATIONS. TRASH: EACH LOT SHALL HAVE AN INDIVIDUALTRASH CONTAINER. UTILITIES: ALBEMARLE COUNTY WATER & SEWER AFFORDABLE HOUSING: AFFORDABLE HOUSING TO BE PROVIDED IN ACCORDANCE WITH THE APPROVED BROOKHILL PROFFERS. SEESHEETIA. TOTAL PROPOSED UNITS:135 TOTAL PROPOSED AFFORDABLE UNITS: 20 UNITS OR CASH IN -LIEU OF AFFORDABLE UNITS NOTE: LOCATION OF AFFORDABLE UNITS TO BE DETERMINED WITH THE FINAL SITE PLAN OR CASH IN -LIEU OPTION, CIVICIPARK GREEN WAY OPEN SPACE BUFFERS TOTAL GREEN SPACE 0 1. ACRES uACRES 1a ACRES .6 ACRES 0 0. ACRES .o ACRES oa ACRES 6,o ACRES _ SCOTT R. LINS� Lie. No. 035791 � BROOKHILL BLOCKS 16 & 17A BL O A�OA 0 4�2 E�G1 �q VSMP PLAN �h� SITES (WPO 202100007) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA ROJECT BOUNDARY \.. FUTURE ROAD EXTENSION OPEN "' ' d / / SPACE (UNDER_ DIFFERENT SET OF PLANS) ® ` . • � I LOT % \\ 1i /\\\/'®0-0 1 ® j }t 'SLOT / �\ \ // ®® ' ® 1 I` I I \ „ LOT I�/ r/ - ` , ,• ``� _ , T_ / j ' ® -� a3 \ � LOT I 1 _ ® / \ 1 ... ® ®® ..\ ♦`,` x3 / i )� - " I i / v33 LOT \ 1 / , v9 1 / ®®i �., ,.. "®®® �' I BLOCK 16 ___ /;' \ / `3s -- ,, ® 0 \`. \ ® . li•Y / ,. _ �`, Lor �l , MqR / ® ® ®I /-- �'. / OPEN / a I I 0 _ _ \\ I SPACE ' / 4 LOOT I I ' 9 �a3zc ® I SPACE 0® •/ /( �� , LOT \� _ i" 11 ii �I a6 1v`'' / i� vo3 9� / �/ ® /0�' `•f �'; .`\\ LOTS\, L - __\,'� l�'oT _ ® ` V✓ ® / ®� . ! / \` Lor ` /�/ \ , � i 1 OPEN ®'®®®® ./� {/..'.� v` /' �' I SPACE / / \ (\ f -f i �� ♦ - I / '''i LOT 4 f �'.� "oT o ®\\. BLOCK 17 k, -� .�_... / � � f�, :� �� J� s` � �` / / \ /,,.�,1 /: f.'.'J•. ' C"',.1 P 1 ®-.:, • • [/` `LO < a8 ` \\ �`i i' 6 I I L°5 \ \v`` � ' \ ' �' LOT ` \ \\, /, T 8 r / 9/ •,l ®�\` \\ \------ a LOT 39 71r- ® �` - �"I , `, ® ' �' 1 r ./ , `, , LOT 35 ` � /� OPEN SPACE OT 66 6 63 _ T y ® `\/ LOT/ 0 ` . 6 II' `, 4 `�\`, 3 I 1 s „ I I OP PACE 0 ®®®®®® / '� rr30' NATURAL BUFFER ALONG PROPERTY'S PERIMETER e� G \ o _ / ROJECT BOUNDARY C SHEETLAYiOUT 1.OHA SEY AVENUE WILL BE DESIGNED TO THE "FIGURE g: CONNECTOR ROAD - SCALE: 1" = 1 OO 1 PUBLIC VDOT ROADS" CROSS-SECTION AND STANDARDS SPECIFIED IN SECTION 2.8 OF THE ZMAzol500007 CODE OF DEVELOPMENT. 1. SABLEWOOD DRIVE, LACONIA LANE, MARCELLA STREET, AND MARCELLA COURT WILL BE DESIGNED TO THE "NEIGHBORHOOD STREETS - PUBLIC VDOT ROADS" CROSS-SECTION AND STANDARDS SPECIFIED IN SECTION 2.8 OF THE ZMA101500007 CODE OF DEVELOPMENT. M-016 Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS 4 PHASE I EROSION & SEDIMENT PLAN 5 PHASE I EROSION & SEDIMENT PLAN 6 PHASE I EROSION & SEDIMENT PLAN 7 PHASE II EROSION & SEDIMENT PLAN 8 PHASE II EROSION & SEDIMENT PLAN 9 PHASE II EROSION & SEDIMENT PLAN 10 PHASE III EROSION & SEDIMENT PLAN 11 PHASE III EROSION & SEDIMENT PLAN 12 PHASE III EROSION & SEDIMENT PLAN 13 EROSION & SEDIMENT CONTROL DETAILS 14 PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN 15 POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN 16A WATER QUALITY STORMWATER MANAGEMENT PLAN 166 STORMWATER MANAGEMENT DETAILS 17 STORMWATER MANAGEMENT DETAILS 18 STORMWATER MANAGEMENT DETAILS 11A UNDERGROUND DETENTION SYSTEM STANDARD NOTES & DETAILS 196 STORMWATER MANAGEMENT STANDARD NOTES & DETAILS 20 STORMWATER MANAGEMENT GENERAL NOTES & DETAILS *11 GRADING & DRAINAGE PLAN *12 GRADING & DRAINAGE PLAN *13 GRADING & DRAINAGE PLAN 25 TOTAL SHEETS *THE GRADING & DRAINAGE PLAN SHEETS HAVE BEEN ADDED TO THIS SET FOR INFORMATIONAL PURPOSES ONLY. THESE SHEETS DEMONSTRATE THAT POSITIVE DRAINAGE HAS BEEN PROVIDED AWAY FROM THE HOUSES FOR A MINIMUM OF 10'. THESE SHEETS ALSO SHOW THE TOP & BOTTOM ELEVATIONS OF THE RETAINING WALLS. LEGEND: EROSION CONTROL k VIRUNIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICAnON NUMBER CE CONSTRUCTION ENTRANCE 3.02 CR CR CONSTRUCTION ROAD 3.03 STABILIZATION 8 SF �f �( JY SILT FENCE 3.05 ST SEDIMENT TRAP 3.13 0 O SB O SEDIMENT BASIN 3.14 OP OUTLET PR07ECT70N 3.18 RR RIPRAP 3.19 CD ' CHECK DAM 3.20 IS IS TEMPORARY SEEDING 3.31 PS PS PERMANENT SEEDING 3.32 g� OTREE PROTECTION 3.3B DC OC DUST CONTROL 3.39 SITE PLAN EDGE OF PAVEMENT CURB PROPOSED ASPHALT PAVEMENT L EXISTING VEGETA77VEIILANDSCAPE BUFFER - - - - - - - - - - - GREEN WAY BUFFER ------- PROPOSED EASEMENT ®DROP INLET DRAINAGE PIPE ----------- 200----------- EXISTING CONTOUR zoo PROPOSED CONTOUR 506.71 TC PROPOSED SPOT ELEVA77NN 506.21 EP TIC DEN07ES TOP/BACK OF CURB T/B DENOTES TOP OF BOX 508.00 TW PROPOSED SPOT ELEVATION 502.00 Bc TW DENOTES TOP OF WALL 500.67 BW BG DENOTES BOTTOM GRADE AT WALL BW DENOTES BOTTOM OF WALL PRESERVED STEEP SLOPES MANAGED STEEP SLOPES PROPOSED CONCRETE PROPOSED GEO-GRID FOR RETAINING WALL OO CO 0 OO 100 YR. FLOODPLAW H C Z F w � C i O F L) Z O e i ¢ Z o O C U Z o �¢= O J O ¢ w L 3n w F- Z m L ¢ c d Of a u 0 � w e W Uj_ LU t\O n C N L Z� M N M I z CD J rn N I % , A W >, J _j / TI LU F F- 06 O/ w < /^' V / U O I O Y J LLI m F- � J �I F- LU 2 Z w Y _ IY co p J F- °e w m IY J< O O O N U w F F LU w w c0 _ a 3n JOB NO. 182150 SCALE 1 "=100' SHEET NO. 1 �I/� \\\I 1111 I �\� — \ t � \ ►� i'/�/ / �` ..� V I� \ \ \ \ ` \— _—_'-' _ ,, ! / ,, � /— _ _ NOTE: /% // - - — \ _ �� 1 — �! �< , --1 L�L� _ _�� — �! �y�///% _, — _ \ \\/ I l 11 THE CONSTRUCTION OF THE PHASE II POLO GROUNDS ROAD IEW) I // // - / / / I \ �� _ / \ \ I \/ l I - _ - -i j f�� �/ /� // i �\ \ / I I I / %// // — / �/ / I / \ �_` \ \ / I \ \ �,�/// \ / i.{ I \ r— // /� — \ \ �' IMPROVEMENTS (PROVIDED UNDER A SEPARATE PLAN) IS 11 — r/ // l \ \` � �� \ ��/i ' % �1 \ —<-- � _— -.` � / %� �/'i_ _ _�^ \\ \- / j/ I I I REQUIRED PRIOR TO THE ISSUANCE OF CERTIFICATE OF I/Ili -_,, ////! �\ \\\ �� v �\\ \ \ // / ' i �?-�:-.:-.:... / / %_ �/----\\\ _ �� v �/ — �i // v � // 1 ,- . �'� ; / = . _ .`. _ _ , I v � ( I I v � v ' OCCUPANCIES FOR BLOCKS i6 & 17 OF BROOKHILL. I III -- / ////� \\\l \\ �— / .y. // / - - \\\ \ \-/ \ l III II I I 1 \ r 43e �J /J/ / / // / \ o \ - TMP 04600-00-00=01989 I - - _ _ _ I - - / f l / / N / ,/ 7/ `' - \ s � � / OPEN S ,� GREE nrm., �. PAPG y,�l 1� i t �''I �.�%. � . _, - w / / / \ \\ I \ J ) / / /� T / \ \ \ � ` - _ \ / / / / / �I iL \ / / - ROQKII 7�ASR ASSO IATIONN@' / '�'I`> :' = -. // / / / -\\ \\ \ // / /' /i%/ / / \ Illl \1 \ \`, ,/ // /z �_ � _ \\ � C.;3 ,� . . �- �._�, : ' � / / / / / \�\ �- / /� / / /- \ -- - � - \ \ / - / D B 5512,; P 0 � .-�� i . : I , \ �/ / / / / \ // \ \\ \ 0 E.. �\ / �/ // � - /i. / / / / / \ \\ / ///// - / / I� / / � -� // l \\ (,� i _ ��__ _ / / 50.7 ACRES ii'. / / / \\ \ \` XISTING STREAM \BLOCK C ' ® i ♦/ =,a i i�� :,' %i : i' - / / / i / \ �\\ -- /I l( 1 ( / / // / _ _ - «- \ /// j/ J�\ \ \\l \ \ '\L) / ,\ . 0� 1 j / .LL.LL '� r 1��.. LL/ � �� i/ //* .. � �/ - - - / / / -_ -; �_ <� -/- ) 11 I j / / / // / / / � — � - - / / -� ./. • l' •' • - ! �°A i . // / FUTURE PUBLIC GREENWAY TO BE DEDICATED TO \§� / / / v / 1 \\\ v C 11 i = � �i :° / / - � " ! �i // -- ALBEMARLE COUNTY AT TIME OF FINAL SUBDIVISION PLAT v- - - - v vv - / I ( / / / v-- AA vv v �� --- v ��- �/ / // // - / / --�/ / _ / - vA v / / / / - --- VA�vv v - - V A v v \ \ � z . 0_ ✓'I / / I 1 / / - - - - / // / / // /�, /� - - �// _PER PROFFER_ #z OF ZMAzoi8000ii / _ - - - v� / / / / / / - / / / / - - _ - VA wv �' Ce � / i \ v A vA \' - ® 1 . .'.' '. . .1. V / l I // / / / / ^'�i+" �� // / / '/ ; ' / / / � / /� / _ v __ \ ,:� 6 / /I / / / / // //// / z ,, , — — / I/ / "l/ / / / / — —— —'*.� v� — I I / / — v SCOTT/R. Cb,LLINSZ ti Lic. No. 035791 � ' 2/4/22 k4 §O`Slnlrnr E�yCsS \\\\ \\ _ — BLO \ - a _ _ _ b 1 B OCK i \ \ _- - - - 3 \ \ LIMITS OF FEMA APPROVED' LIMITS OF OPEN SPACE - - / / / / BL C 8 / \\ \� _ __- - �� \\\ \ iooYR FLOODPLAIN- �\ \\ \\ \ ` o' °� �_ . , LL% :-`1'.1..'l GREENWAY PARCEL r / / /�////�/ / / /I // / / �_ - ` / " i/ / TMP 46-19B� \ _ \ - - - j / / / / z 11 v / - , __ - �_-v vv v ) \ v--_ _ �, / / / / / �/ / / / O v / �� - _ v ,N vvvv v v v \ / / / l / / / - - - / O vv vv'�'' ' a ' . % / / / / / / / - - - - / / / / N N-CROCKETT CORPORATION _ - v - - i / / v �-�vv vv v / / / - - / 5346 PZ 256 i / -� -- -- �� �wv vv vv v V -�--_ A A� . A I l i / / / / / /// / / / / / _ / / / / / i I / / \ ��vv�v vv A , LIMITS OF SUNNY a a , I I I / �// / / �, /- '// / / / / / / O vv vv V 1 f' / / / / �// BLOC 1 / / / / — / / / - - - A / � � � � �vvv�vv � �) DAY DAM BREACH` 0 V -� / I I I I I I I I I / / / / / / - �/ / / r a z / / v�v�vvvv vv A / / l// l V / / / / / - / / �� O / / i / / a v- vv vvA -v a /// b - 1 I I I ( / � // / e // - / i .e / - , � u � u / -- vv \ / / 1 A .� s I �^ �I / I / / / / / m / -- - w e a V) m w / / v" v� v�A \VAV I / EXISTING SANITARY SEWER AND j 1 / I ��I) I I I I / / / / � a / / / / / � w � _i / / \�\\ \\ 1 \ / / / \ ) / / / / _ / / / / / / v v v A\ 11 zo' SANITARY SEWER EASEMENT \ I I I I ,, / / / / / / / / / ) - - v� 1� / / // / v II /� / //� / �/ /' � � / / / / V } 11 I / / f 1 / l l l 11 �' \ li I // / /V/ / / / / / /' - v v z ( E / I I / / / I ., 1 A I I I I III I // // / / / / v1 -%/-v V V O F m l ��� / / / l l �� 1 / / ////l PROJECT BOIIIVDARY (TYP.) O A I I / I I / I III I I l I I // / / / / / / �/ % i A I V � z I I /r I I I /11 Lu / / / / // ?i / 1 ]] - �\ o // / //II � II I Il/ -- -- / � v �'' / / —� / / / / l r t of 1 �l l I / / / v l � � / / /// , � / v / / BLOCK / V o I �.p11 / / / / / I I / J / l l /l / ---- -_ - / / V I v > w / // / �/ �- - / /fir:; © 0 � I / 1 / V o / / . o / / / / / / �. a /11 % j //j// �/ / /� A v / / / l / / V o c s ALBEfv1ARLE COUNTY 1 I I / / / / / / \ 1 I/// / V A 1 v > > Q v I I / / // / \ WLu MANAGED STEEP SLOPES / \ / / % ///////� / llw % /// \ \ � / / / / l l • / \ ,\\ '. I ' I , I I I ' ( ( I I I I I j / / / __ /I I \ I I ti , -� � - 'I / / / \ \ \ / - 4_� / ///// /�/ZY// � � --- /�/ // / / \ \\\\\I 1 / I / / / / / -// / \ \ — — -- - ( - / /i-\\1\ Ice v // ///// / LAVA ( I / / / // � �1) A - \1 - / v v / /�j/� / /j// / - / 1 / / i / / / / V' - vv // //% % _ - T T / J I a, � / , A VA VAVA\\\ V l 1 \ \ \ V A A 1 1 1 1 1 / / / I GENERAL NOTES: A\ - - Z' vv �/ / I / �I/ I v � / / / I \,\A\\v v \ \ v 1 A / I i - / / / / / - A - _ /� ,� - _ /o �r ° \\V A A \ , 1 v / / / / Z/ / 1. THERE IS A FLOODPLAIN LOCATED ON THIS SITE. FEMA MAP ID L \" _ v v �I I 11IIII�IIII�II( l' BLOCK z - — - - / / // \ \ \ 1 \ VA �\ v \I 1 I 1 I / % /' / / / / / / - V -/ _ 51003CO280D DATED FEBRUARY 4, 2005. IN ADDITION, A DAM \, A \ - / i / 0 ° A I I \ v A V v I VBLOCK LINE TYP. v - / / / / / �/ / -\ V l l l l \ , - - - / o o / i / BREACH INUNDATION ZONE EXISTS ON THE PROPERTY FOR THE \ vv �II ��_� - 1 o / x�\%' �v V I U / / / v 1 - � - - / a 0 ' Xa / � � �\ \ , / /// I I I ) / - / - / / \ } I \ \ - - SOUTH RIVANNA DAM, WHICH IS A FEDERAL DAM LOCATED \\\ - - _ �j� o / / / �/ / / / / 1 / / / / //// / ( \\ UPSTREAM OF THE PROPERTY. _� /' 0��/ / i / , / / / / / �� _ \ \ 2. A PROPOSED GREENWAY IS SHOWN ON THE SUBJECT PROPERTY. BLOCK \/ I �°\\� � _ /'�// / / ` / `T / / / - / //// I l \ 3. BEFORE BEGINNING SITE WORK THE CONTRACTOR SHALL v v / 3 \ // ///// C� A'� / � - � —' /�'l 9 \ 00 / � � ti / / / �/ / /� A I //// I A �\ v - - ' - INVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF �/ / , - / // - \ / � / � / � � �/� / � `` �/' o � / � � _ � / / / // \ /\l /I ( \ \ \ � _ � - - � UNDERGROUND UTILITIES MECHANICAL AND ELECTRICAL SYSTEMS, / / \\ I \ • O O / / % / ` t /i / ,' \ \ - AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE _ _ \ \ \ �. `1 \� // „ j \ /,�T I \ \ \ \ - � � / CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION v / - vy v �� o / / i , ; = � � /� I v - - _ , - AND INVERT ELEVATIONS AT POINTS OF CONNECTION OF SANITARY - Vv v v I V \\ \ / / �� � v v V A vv� �I \ o o / ' / A� \Ayr V A v � �// SEWER, STORM SEWER, AND WATER -SERVICE PIPING; _- / / . ----� �L v A AJ \ � VV \ V / / / / A A( 'I I / v - - / UNDERGROUND ELECTRICAL SERVICES AND OTHER UTILITIES. THE __ �� �v V A\'' �. A ALBEMARLE COUNTY /�� \ v v - ' CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED vvv v v V / V 1 j T (/ - / PRESERVED STEEP SLOPES // �I 1 A - - , �� - � / V�� v �� / / / / / a - �� S - 0 / x v v - - - - - / TO PROJECT THAT MUST BE PERFORMED BY PUBLIC UTILITIES v \ A / / / / / ' A' A 1 ` ' - I I, � v - / /_'/ SERVING THE PROJECT SITE. \ V �� V / / // A o-- ,f' a / r, A _ - / 4. CONTRACTOR SHALL VERIFY SIZE TYPE &LOCATION OF EXISTING - «� � --- \ / // // // // // / � , / \/ 1 P \ \ � // - / / ' - I I I I I I I � I\\\ \ - - - - - - / THE SITE. \ I \ \ \ V / I / / / / / / I //// 1 �� V �\ A -- n«� � I I \ �-- ' — — — — — — — / - / _ i M — V / / ////// _ / WATER LINES ON I - /�/'/// /;/ �;% /1 / \v \ o /� �'// /'�' / �1 III \v '%- - // - �/ _ / - / j// // // / /�/ / / /� // / ° \ 0 / / / / /EXISTING LIMITS - - I \ \ - - - 1i - - , /// /// i \ x �� / ////// /// / //////// 16/� .' 00 o I II III// / l /l/ / OFTREELINE \\ _ / � (I\ \ \- — __���>j �5, / / vv ,� % / �/ / ///%/� `� o / 11 / l I / / -- �' / 'I 1Av V -' /%/ z r /, / / I � - // /�a / o � / ��o I / / I / - �J \ _ //// -- / // l \ , % i llI l l l ° / ti' EXISTING WETLANDS (TYP.) o o /. / / _ - -a. - , ! l - - / / / x //�—:- 0 'III / // / _ / / / /� / - / ,0 I / �� � -_ � _�-- L / / // �- // II II1 �I o v - - I BLOCK 6 / X �� - / I I V{1 11. V �o � I 1 / / / , � / - f� / � \ I 1 I I / / / / \ ' > k j/// � �/l \ \ \\\\\)y\\ ' a I c // I. o / FUTURE PUBLIC GREENWAY TO BE DEDICATED TO / � - / � - /' _ --_�/ TMP 46D-B - � _ - \ // /// /� o / 0 I ALBEMARLE COUNTY AT TIME OF FINAL SUBDIVISION PLAT, - _ '/MONTGOMERY RIDGE OWNERS ASSOCIATION - _ a b / / �ti _ 1 1 1 0 / t/ - - � \ ,r /, / \ / /)' �/� - �/ / PER PROFFER #z OF ZMAzoi8000ii - / / �_ DB 3433 PG 132 / / a8 \ \\ �/ //// 1 p / / 0 / I \ / -/ , // - ---- / ��' �'' / / \ . o I / - / / �- \ \� , r , _ \ \ 1BLOCK _ / l \ ao / / I .: O \ I 1 I I - - / / T BO_UNDARY (TYP )� �� 3az //// / - / — - I \ - - PROJEC / / / / / � / / 7� A I I1 -� / �D I I g �I I\ I\ \ - - �' / - � _ / - \% ii y, /, -/ o I I � , \\ �' . o ' TMP 04600 00 00 0 9B8 / / - / / \ / / / / / / / j \ 1 � \ \ s \ >:. a I CROCKETT CORPORATION- - / i / / / / / I / I I 1 \ \ V A C / \ 0 , I D.B. 5346, PC. 25 — ° / _ - / - � ��� / � \ \ vv I N::: I \ � � / / A '`i / / / i � \ \ \ V A V A �V o l 119.69 ACRES v , - / / / - / / / AV AAA \ / /- . 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EXI� -� / -i / v� I /l �. �/' /-�i- --, �� e / \ \ / o ' i�,T I A A 0 / _ +�/ / ' / / i %// /ice —i— i i / -/ /_ s I I I A / / v - - 0 STING TREELINE (TYP.) / / I 111I ( \ \ \ \-- r — \ \— — , _ —/ / / i \ \/ ' , \ Y' ' � ` / ,/�--i—_=_ i i / /// / ),� \ \ I /^ I I I 1 I I I I I I I I \ \ \ \ \ - - '// \ \\ - - - EXISTING ioo-YEAR FLOODPLAIN (TYP.) 0 . / / / / /'/ / Y/ ///M I /_ - ' % -/ /// ` 1 ! \ \\ -o �1 I I I I I ( \ \ \ \ � �� � // - - � \ - - 1\ \� \ I ; PORTION OF EXISTING R/W TO BE rr �,' XISTING PROPERTY LINE (TYP.) � / / j/ / j / / / /' / ' ///v////' // - i _ - _ /j / / i / ,' \ \ / � \ o' LANDSCAPE/REFORESTED , / ///// I /f ' _ lull \ \\ \\\ -- //Z^ , \\ i // / // / ¢< I 0 3 / V \ VACATED WITH THEIMPROVEMENTSTO / / / / ///'i/ %/%d///////% /-- -'`,/// /^ \.. iiC I I \\ \ \ // / POLO GROUNDS ROAD (SUBzoi7ooii7) , EXISTING ioo-YEAR FLOODPLAIN (TYP.) / / / / // // U / ////// // / / - - / \ \ \ \\ I - - / - EXISTING iz" SANITARY SEWER TO REMAI / I \ OO _ — / / % yl ' � / / / / // j, , x %%/ /%/ / / / / / 1 BUFFER AREA I - \ \��\`\\\\\ \\ \\, \�=-zIj///�,�\... - --- -.,- / i 11� _' I I�' I 1 I* <J \__,. -// ��/// .� '%///lll/',, �, /i; __/ /' ' / l,-j �1\1" _�////jj//�%, ///j/////llll 111/////--/----//-/ i�/ �\ `I \ \ \�\\\\ \ I ; - i _ / EXISTING PROPERTY LINE (TYP.) o \ � - - / / / /, / l /// ll/ /' (l l l i // - / %%/ / , / j s/ //////// 11/ll // l �/ / /- / j - - - -'' / / /3 / / // \ \ - \�\\\\� � \ - � // - EXISTING 3o PRIVATE LANDSCAPE BUFFER EASEMENT �- 0 1 s \ \ / / ' !L , j/ % l u/l /// /l 11 l 11 / 11 l I ( l \ // / , � '% //////// l/ l / l A/ / - - �/ \ / l // // 1 / 1 , 1\\\\\\ a / / // -- / / /;\ \ \ \ �!\\\\\ ii!. 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N M N ti � .--i Lu .--� N N � N N L9 z W W ul z 0) ti C) cM N M It N O rn N N > Lu __J U) Lu — 0 U Y Lu U) Lu Lu Of Lu Of r V O O N Q 0- G ,--1 06 0 co 1--1 0 co Z O 0 O z U) Lu JOB NO. I 182150 SCALE 1 "=100' SHEET NO. 2 EROSION & SEDIMENT CONTROL MEASURES: EROSION CONTROL NOTES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE THE WRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRAC77CES USED PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND IN THIS SECTION CONSIST OF THE FOLLOWING. DISTURBING AC77VITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED 3.01 SAFETY FENCE., ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE SEDIMENT CONTROL REGULATIONS. TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 774E VIRTUE OF P07EN77AL ACCESS BY 774E PUBLIC. FIRST STEP IN CLEARING. 302 CONSTRUCTION ENTRANCE., 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON A STABILIZED CONSTRUCTION ENTRANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS THE SITE AT ALL TIMES. ON A CONSTRUCTION SITE TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC 5. PRIOR TO COMMENCING LAND DISTURBING ACTIW77ES IN AREAS 07HER THAN INDICATED ON ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS THESE PLANS (INCLUDING, BUT NOT LIMITED T0, OFF -SITE BORROW OR WASTE AREAS), THE SHOWN ON 774E PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 303 CONSTRUCTION ROAD STABILIZATION.' THE TEMPORARY STABNZA77ON OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS AND 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL 07HER S17E VEHICLE TRANSPORTATION ROUTES W774 STONE IMMEDIATELY AFTER GRADING. TO MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA7ON AS DETERMINED BY THE PLAN REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC DURING WET HEATHER AND APPROVING AUTHORITY. TO REDUCE EROSION AND SUBSEQUENT REGRADING OF PERMANENT ROADBEDS BETWEEN THE TIME 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL OF INI77AL GRADING AND FINAL STABILIZATION. USE WHEREVER STONE -BASE ROADS OR PARKING 77MES DURING LAND DISTURBING AC771477ES AND DURING SITE DEVELOPMENT UNTIL FINAL AREAS ARE CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION STABILIZA7ON IS ACHIEVED. TRAFFIC. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 305 SILT FENCE & SUPER SILT FENCE: 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS EACH RUNOFF -PRODUCING RAINFALL EVENT ANY NECESSARY REPAIRS OR CLEANUP TO AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONS7RUC77ON OPERATIONS IN ORDER TO 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS: THE SILT FENCE BARRIERS SHALL BE INSTALLED 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET INERT MATERIALS ONLY FREE OF ROOTS' STUMPS WOOD RUBBISH AND OTHER DEBRIS. FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING MAINTAINED IN ACCORDANCE W17H THE 14RGINIA EROSION & SEDIMENT CONTROL HANDBOOK ORDINANCE SECTION 5.1.28. (VESCH). 13 ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SEC77ON 13-301 OF THE CODE OF ALBEMARLE. 307 STORM DRAIN INLET PROTECTION., 14. BORROW, FILL OR WASTE AC77WTY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR LIMITED TO THE HOURS OF 7:00 AM TO 9: 00 PM. CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO 15. BORROW, FILL OR WASTE AC77WTY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO DRAIN INLETS ARE TO BE MADE OPERA 77ONAL BEFORE PERMANENT STABILIZA 77ON OF THE ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, CORRESPONDING DISTURBED DRAINAGE AREA. SINKING, OR COLLAPSE. 3.09 TEMPORARY DIVERSION DIKE., 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING PERMANENT STORMWA TER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT OTHER POR77ON OF THE PROPERTY. SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS 17 TEMPORARY STABILIZA7ON SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWA7ER RUNOFF MUST BE AT 75 LBSIACRE, AND IN 774E MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE OF ANNUAL RYGRASS AND CEREAL WNTER RYE, OR IN MARCH AND APRIL TO CONSIST OF DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS ANNUAL RYE OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO OR LESS WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. BE APPLIED AT 8OLBS/10OSF. ALTERNA77VES ARE SUBJECT TO APPROVAL BY THE EROSION 3.11 TEMPORARY RIGHT-OF-WAY DIVERSION: CONTROL INSPECTOR. A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED 18. PERMANENT STABILIZA77ON SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW LENGTH WITHIN A SLOPING AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS11000SF, INCORPORATED INTO RIGHT-OF-WAY, THEREBY REDUCING THE EROSION POTENTIAL BY DIVER77NG STORM RUNOFF TO A THE TOP 4-6 INCHES OF SOIL. FER77LIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS ACRE AND LITTLE OR NO CONSTRUCTION TRAFFIC WTHIN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYGRASS OR KENTUCKY TRAFFIC. BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. AL7ERNA77✓ES ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 313 TEMPORARY SEDIMENT TRAP: 19. MAINTENANCE. ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED NTH SEDIMENT. ALL ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. THE TOTAL CONTRIBU77NG DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP RE SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF 774E1R HEIGHT N E WHICH WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION W7H A TEMPORARY DIVERSION DIKE. MUST CLEANED AND REPAIRED IA 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 3.14 TEMPORARY SEDIMENT BASIN., DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO A TEMPORARY BARRIER OR DAM KITH A CONTROLLED STORMWA TER RELEASE STRUCTURE FORMED APPROVAL BY THE EROSION CONTROL INSPECTOR. BY C0NS7RUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL 21. THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS NECESSARY IN SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH THE FIELD AS S17F CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT BASIN OR TRAP CAN BE FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE REMOVED WITHOUT WRITTEN AUTHORIZATION. THE TOTAL CONTRIBU77NG DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A SOIL DESCRIPTION: TEMPORARY IMPOUNDMENT. SOILS ON -SITE ARE CURRENTLY AS FOLLOWS: 318 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR 0774ER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT 16-CODORUS SILT LOAM-2 TO 29 SLOPES. SOIL IS SOMEWHAT POORLY DRAINED WITH A VERY HIGH THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-8" THICK. OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTEN77AL FOR THE DEPTH TO THE WATER TABLE IS GENERALLY 9-18". DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWA7ER 28DJ-ELIOAK CLAY LOAM-15 TO 259 SLOPES. SOIL IS TYPICALLY WELL DRAINED WITH A HIGH FLOWS. APPLICABLE TO 774E OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY CLAY LOAM AND ABOUT 0-8" THICK. 319 RIPRAP: THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". A PERMANENT EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE NTH 27B-ELIOAK LOAM-2 TO 71- SLOPES. SOIL IS TYPICALLY WELL DRAINED WITH A MEDIUM RUNOFF FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM 774E EROSIVE FORCES OF CLASSIFlCA7/ON, SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE THE WATER TABLE IS GENERALLY MORE THAN 80". P07EN77AL FOR INFILTRATION AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS AND OR 27C-CLASSI LOAM-7 TO SLOPES. /S TYPICALLY WELL DRAINED WITH A MEDIUM RUNOFF NON -COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, FA IS CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH 70 WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC, ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. THE WATER TABLE IS GENERALLY MORE THAN 80". 34B-GLENELG LOAM-2 TO 79 SLOPES. SOIL IS TYPICALLY WELL DRAINED WITH A MEDIUM RUNOFF 3.31 TEMPORARY SEEDING .• CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0 8" THICK. THE DEPTH TO THE ESTABLISHMENT OF A TEMPORARY VEGETA 77W COVER ON DISTURBED AREAS BY SEEDING WITH THE WATER TABLE IS GENERALLY MORE THAN 80". APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY 34C-GLENELG LOAM-7 TO 157 SLOPES. SOIL IS TYPICALLY WELL DRAINED WITH A MEDIUM RUNOFF STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR THE WATER TABLE IS GENERALLY MORE THAN 80",, OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETAT70N OR 07HER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 34D-GLENELG LOAM-15 TO 259 SLOPES. SOIL IS TYPICALLY WELL DRAINED WITH A HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-6" THICK. THE DEPTH TO 332 PERMANENT STABILIZATION: THE WATER TABLE IS GENERALLY MORE THAN 80". THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLAN77NG SEED. 39D-HAZEL LOAM-15 TO 259 SLOPES. SOIL IS TYPICALLY EXCESSIVELY DRAINED WITH A MEDIUM TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80"". AND ALLOWS SELECTION THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE 39E-HAZEL LOAM-25 TO 457 SLOPES. SOIL IS TYPICALLY EXCESSIVELY DRAINED WITH A MEDIUM HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 338 TREE PRESERVATION AND PROTECTION: 95-HATBORO SILT LOAM-0 TO 29 SLOPES. SOIL /S TYPICALLY POORLY DRAINED WITH A VERY HIGH PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR 07HER INJURY DURING LAND DISTURBING RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-10" THICK. AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL THE DEPTH TO THE WATER TABLE IS GENERALLY 0-30". BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER REFERENCE: WEB SOIL SURVEY ONLINE DATABASE, FOUND AT ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES http://websoilsurvey.nres.usda.gov/appIWebsoilsurveyaspx 339 DUST CONTROL: 1992 REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH 774E VESCH. SEDIMENT BASIN BAFFLE DETAIL NO SCALE NOTE. - BAFFLES SHALL EXTEND FROM THE SHEETS OF 4'x8Oxj' EXTERIOR Borrow TO 6' ABOVE THE OVERFLOW. PLYWOOD OR EQUIVALENT 6' 1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO I 1 II 4 II 1 RISER CREST --rREVL,H-vp&-upe-AL-L-4va--7-riE IVE Wit H' is. 77ON OF POSTS. POSTSP RE OR 5" MIN SIZEI '2%%;II II .� �III�I Ihi n� �%W -4N ii1ryli1�1 %11A_ ( 1.1 Vu\1�� �L'• ft�/iltl1 TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS 'QUICK REFERENCE FOR ALL REGIONS" Rate Planting Dates ,Species (Ibs,/a�e) Sept. 1 - Feb. 15 50/50 Mix of Annual Ryegrass (Lolium multi-florum) & 50 - 100 Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (Lolium multi-florum) May 1 - Aug 31 German Millet 50 (Setaria italica) Source: Va. DSWC ;:�,___ �ii -I I- - FLOW I1� 1IIIIII�Il -� 4 J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SUPER SILT FENC ssF (WITH W/RE-BACK os- NO SCALE EROSION CONTROL NOTES & NARRATIVE: DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: PROJECT DESCRIPTION: THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO CONSTRUCT A RESIDENTIAL SUBDIVISION. THIS PLAN PROPOSES 26.25 cc. OF LAND EROSION AND SEDIMENT CONTROL MEASURES., DISTURBANCE. THE PROJECT WILL BEGIN ITS CONSTRUCTION WITH THE PROPOSED ESC MEASURES FOLLOWING PLAN APPROVAL, WHICH IS IT IS ANTICIPATED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION, ANTICIPATED TO BE IN THE SUMMER OF 2021. THE WORK IS ANTICIPATED TO BE COMPLETED K17HIN 24 MONTHS AND TO CONCLUDE IN THE DIVERSIONS, TWO SEDIMENT BASINS, A SEDIMENT TRAP AND SILT FENCES TO CONTROL SUMMER OF 2023. SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL EXIS77NG SITE CONDITIONS. LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE AREAS SHALL BE DISCUSSED WITH THE PROPOSED DEVELOPMENT IS LOCATED ON A PARCEL WITH EXIS77NG WOODS AND GRASSY LAWNS. THIS S17F IS GENERALLY WELL SLOPED WITH THE ESC INSPECTOR AHEAD OF 77ME & WILL NEED TO BE MAINTAINED AND STORED FOR A RIDGE RUNNING NORTHEAST THROUGH THE PROPERTY, K17H POLO GROUNDS ROAD TO THE SOUTH AND THE STREAM TO THE WEST BEING THE LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON S17F AND SHALL BE STABILIZED LOWER AREAS. ADJACENT AREAS WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR THIS SITE IS SURROUNDED TO 774E NORTH BY OPEN SPACES WITH TREES AND LIGHT UNDERBRUSH. TO 774E WEST OF THE PROPERTY IS A STREAM. ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES THE SOUTHERN POR77ON OF THE SITE IS BORDERED BY POLO GROUNDS ROAD, AND THE RESIDEN77AL SUBDIVISION MONTGOMERY RIDGE IS LOCATED HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED TO THE EAST. SILT FENCE W774 WIRE BACKING DIVERSIONS TWO SEDIMENT BASINS, A SEDIMENT TRAP, INLET CONTROLS AND VARIOUS OTHER ESC AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MEASURES ARE PROPOSED TO LIMIT 774E P07EN77AL FOR CONTAMINATION OF THESE ADJACENT PROPER77ES AND WATERWAYS. MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE OFFSITE LAND DISTURBANCE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN OFFS17E LAND DISTURBANCE /S LIMI7ED TO PUBLIC RIGHT-OF-WAY AND EASEMENTS. SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINA77NG VEGETAT70N SOILS: IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL SEE SOIL DESCRIP77ONS ON THIS PAGE, AND THE PHASE l ESC PLAN FOR THE BOUNDARIES. DEPEND ON THE 77ME OF YEAR APPLIED. THESE MEASURES, AND THE FOLLOWING, ARE CRITICAL AREAS.• PROPOSED: EXISTING STEEP SLOPES, A STREAM AND A GREENWAY ARE LOCATED AROUND THE PERIMETER OF THIS SITE. THE STEEP SLOPES ARE A MIXTURE OF PRESERVED AND MANAGED STEEP SLOPES. THESE AREAS ARE CONSIDERED TO BE CRI77CAL AREAS THE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAU77ON IN AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON THEM OUTSIDE THE SCOPE OF THE 3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PAR77CULAR AREA. PROPOSED PLAN. TREE PR07ECT70N FENCING SILT FENCING, DIVERSIONS AND SEDIMENT ]RAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST 3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO STEP IN LAND DISTURBANCE TO ENSURE THESE CRI77CAL AREAS ARE MAINTAINED. PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. SEQUENCE OF CONSTRUCTION: 3.03 CONSTRUCTION ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY 1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT PRE -CONSTRUCTION MEETING. REGRADING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF IN177AL GRADING AND FINAL 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE PR07EC77ON FENCING SHALL BE INSTALLED. ADDITIONALLY, THE PRESERVED SLOPES & GREENWAY SHALL BE FLAGGED OR MARKED BEFORE LAND DISTURBANCE CAN START. STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUC77ON PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON CONTRACTOR PARKING & STAGING AREAS AS NEEDED. THE PROJECT. 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. 4. INSTALLAT70N OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL MODIFY THE EXISTING PAVED 3.07 STORM DRAIN INLET PROTECTION- INLET PR07EC77ON IS PROPOSED ON INLETS, ENTRANCE TO MEET THE MINIMUM CONSTRUCTION ENTRANCE REQUIREMENTS SHOWN ON THE THE DETAIL ON THIS SHEET. THE CONTRACTOR WHERE SHOWN ON THE PLANS SHALL ALSO GRADE, WITH THE APPLICA77ON OF CONSTRUCTION ROAD STABILIZATION IMMEDIATELY BEYOND THE CONSTRUCTION ENTRANCE TO 309 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TO U177GATE THE SHARP INCLINE IMMEDIATELY BEHIND THE EXIS77NG ENTRANCE BEING MODIFIED. THE CONTRACTOR SHALL ALSO PROVIDE CONSTRUCTION ROAD STABILIZATION TO THE SURROUNDING AREA ENVISIONED FOR THE CONTRACTOR PARKING & STAGING AREA. CONTRACTOR DIRECT RUNOFF INTO A SEDIMENT TRAPPING DEVICE. SHALL ENSURE THE CONSTRUCTION ENTRANCE AND PARKING AREA ARE PROPERLY GRADED AND DRAIN TO AN ADEQUATE E&S MEASURE. THE 311 RIGHT OF WAY DIVERSION- A RIGHT OF WAY DIVERSION IS PROPOSED AT THE CONTRACTOR SHALL INSTALL A SMALL NEARBY SEDIMENT TRAP FOR VEHICULAR FLASH WASH OFF, NTH A PAVED RIGHT-OF-WAY DIVERSION CONSTRUCTION ENTRANCE. DISCHARGING INTO IT. CONSTRUCTION ENTRANCES ARE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC 313 SEDIMENT TRAP- A SEDIMENT TRAP IS PROPOSED WHERE SHOWN ON THE PLANS. ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. 3.14 SEDIMENT BASIN- TWO SEDIMENT BASINS ARE PROPOSED WHERE SHOWN ON THE WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. PLANS SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT /S REMOVED IN THIS MANNER. 318 OUTLET PROTECTION -OUTLET PROTEC77ON IS PROPOSED AT THE OUTLET OF PIPES. 5. THE IN177AL ESC CONSTRUCTION MEASURES, AS SHOWN ON THE PHASE l EROSION & SEDIMENT CONTROL PLAN, SHALL BE INSTALLED NEXT. 319 RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES. THE CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE. PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE 332 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED NTH THIS CONSTRUCTED AS A FIRST STEP NTH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND PLAN. DISTURBANCE TAKES PLACE. 3.38 TREE PRESERVATION AND PROTECTION- TREE PR07EC77ON IS PROPOSED NTH THIS 6. ONCE THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. THE CONTRACTOR SHALL PROCEED TO LIGHT CLEARING OF THE SITE. THE CONTRACTOR SHALL BEGIN BY CLEARING THE AREAS REQUIRED TO 'A', ACCESS THE LOCAT7ONS OF SEDIMENT BASIN SEDIMENT BASIN B' AND THE AREAS DESIGNATED AND/OR APPROVED BY THE INSPECTOR 339 DUST CONTROL -OUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. FOR CUT REQUIRED FOR THE BASINS' INSTALLATIONS. INSTALLA77ON OF SEDIMENT BASIN A' & SEDIMENT BASIN B' SHALL IMMEDIATELY FOLLOW THE SELECTIVE CLEARING. FOLLOWING THE INSTALLATION OF THESE MEASURES, THE CONTRACTOR SHALL INSTALL THE DIVERSIONS. THE MAINTENANCE: DIVERSIONS SHALL MAINTAIN POS177VE DRAINAGE TO THE SEDIMENT TRAPPING DEVICES AT ALL TIMES THROUGHOUT CONSTRUCT/ON. ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME. IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL 7 ONCE ALL 774E PHASE 7 EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO THESE EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF THE SITE . RAINFALL. MONITORING REPORTS' WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC L TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS 8. AFTER CLEARING 774E PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE 9OF THE EROSION &SEDIMENT CONTROL PLAN. UPON D. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE INSPECTOR APPROVAL, 774E CONTRACTOR SHALL BEGIN ROUGH GRADING THE S17F TO THE CONTOURS SHOWN ON THE PHASE I7 EROSION & NTH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b.ALL GRAVEL OUTLETS WLL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL SEDIMENT CONTROL PLAN. ANY RETAINING WALL CONSTRUCTION THAT OCCURS IN ESC PHASE ll WITH THE GRADING OPERATIONS SHALL FILL THE AREAS PREVENT PROPER DRAINAGE IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL SURROUNDING THE RETAINING WALLS IN A MANNER THAT ENSURES 774E FILL LOCATIONS ARE LEVEL VERTICALLY AT THE END OF EACH WORK DAY. SUCH A WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. PRAC77CE KILL LIMIT CHANNEL FLOW AND PROM07F SHEET FLOW. WORK ASSOCIATED NTH ANY RETAINING WALLS NEAR A GREENWAY SHALL OCCUR ON THE c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR TOP SIDE TO REDUCE POTENTIAL IMPACTS TO THE DOWNSTREAM AREA. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE FIRST STEP NTH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. REMOVED WHEN THE LEVEL OF SEDIMENT DEPOS177ON REACHED HALF WAY TO THE TOP 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE ll EROSION CONTROL PLAN. TEMPORARY OF THE BARRIER. SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS 10. ONCE ALL 774E PHASE ll EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, THE SITE IS ROUGH GRADED, DRAINAGE lS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. PROPERLY CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN PHASE III OF IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT KILL BE 774E RLD OR THE EROSION & SEDIMENT CONTROL PLAN. CONTRACTOR ON -SITE. THE RLD's CONTACT INFORMA77ON CAN BE FOUND IN THE SWPPP, 12. THE CONTRACTOR CAN BEGIN INSTALLATION OF 774E UTILITIES, CURB AND GUTTER, AND PAVED ROADS. INLET PROTECTI0N SHALL ALSO BE WHICH IS TO BE LOCATED ONSITE AT ALL TIMES DURING CONSTRUCTION. IN ADDITION, THE INSTALLED AS 774E STORM SEWER IS CONSTRUCTED. INLET PR07ECTION SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS OWNER MAY BE CONTACTED. UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE SHALL BE MADE AS NEEDED. IF 774E STONE FILTER BECOMES CLOGGED W774 SEDIMENT SO 774AT IT NO LONGER ADEQUATELY PERFORMS ITS RESPONSIBLE FOR SIT£ MAINTENANCE. FUNCTION, THE STONE MUST BE PULLED AWAY AND CLEANED AND/OR REPLACED. TO PROLONG THE LIFE OF TEMPORARY SEDIMENT BASIN A' THE FINAL CONSTRUCTION OF LOTS 123-127 & UNDERGROUND DETENTION SYSTEM A' SHALL BE DELAYED. TO FURTHER PROLONG THE LIFE CONTROL NOTES: ENT OF SEDIMENT BASIN A', AND TO THE LIFE OF SEDIMENTEROSION BSHALL UNDERGROUND DETENTION SYSTEMS (ANDGAS ITS NEARBY MANHOLES) BE TEMPORARILNY MODIFIEDMTOEWER DIRECT UPLAND RUNOFFHINTO THE BASINS VIA THE TEMPORARY OUTFALLS SHOWN ON THE ESC PHASE 111 SHEETS. SEE SHEETS 10 & 12's N07ES FOR ADDIT70NAL GUIDANCE. ES-1: UNLESS 07HERWSE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND 13. AFTER ALL OTHER PHASE III ESC MEASURES HAVE BEEN INSTALLED 774E CONTRACTOR SHALL COORDINATE THE TIMING OF 174E FINAL STORM SEWER SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MODIFICATIONS TO PERMANENT STRUCTURES, THE FINAL GRADING LOTS &THE INSTALLATION 174E TWO UNDERGROUND MINIMUM STANDARDS AND SPECIFICA7ONS OF THE VIRGINIA EROSION AND SEDIMENT INS 'A' DETENTION SYSTEMS NTH THE ESC INSPECTOR. AT THIS TIME SEDIMENT BASINS A' AND B' SHALL BE CONVERTED TO PERMANENT SWN IM V CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND TIO SEDIMENT CONTROL REGULATIONS. FACIL177ES AND THE RETAINING WALLS ADJACENT TO SWM FACILITIES A' SHALL BE INSTALLED. PRIOR TO CONVERTING SEDIMENT BASINS A' ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE AND 'B' THE CONTRACTOR SHALL ENSURE THE UPLAND WATERSHEDS ARE STABILIZED. THE CONTRACTOR SHALL ALSO OBTAIN APPROVALS PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND FROM THE INSPECTOR TO INSTALL THE TWO UNDERGROUND DETENTION SYSTEMS AND FINALIZE THE CONSTRUCTION OF THE PERMANENT STORMWATER DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. MANAGEMENT FACILITIES. AT THE 77ME OF THE BASINS' CONVERSIONS, THE CONTRACTOR SHALL REMOVE SEDIMENT LADEN MATERIAL & BACKFILL THE AREAS ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS WITH STRUCTURAL FILL TO THE GRADES SHOWN ON THE STORMWATER MANAGEMENT SHEETS THE CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE THE FIRST STEP IN CLEARING. SILT FENCE BENEATH THESE AREAS AT THIS TIME AND ENSURE THE FENCING CONTINUES TO BE EFFECTIVE. THE CONVERSIONS OF SEDIMENT ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE BASINS A' & B' SHALL ONLY OCCUR AFTER ESC INSPECTOR APPROVAL. MAINTAINED ON THE SITE AT ALL TIMES. 14. FOLLOWING THE CONVERSIONS OF THE SEDIMENT BASINS TO PERMANENT SWM FACILITIES, AND THE INSTALLA77ON OF UNDERGROUND DETENTION ES-5:PRIOR TO COMMENCING LAND DISTURBING AC77W77ES IN AREAS OTHER THAN INDICATED SYSTEMS A' AND 'B', THE CONTRACTOR CAN REMOVE THE REMAINDER OF THE EROSION & SEDIMENT CONTROL MEASURES. NO ITEM SHALL BE ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE REMOVED, THROUGHOUT ALL PHASES OF CONSTRUCTION, UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN PERMISSION. TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 15. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADD177ONAL EROSION ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILlZA7/ON SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED ES -].ALL DISTURBED AREAS ARE TO GRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT TO AREAS 7HAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL 16. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL FINAL STABILIZATION IS ACHIEVED. HANDBOOK REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND - ES 8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER SEDIMENT CONTROL HANDBOOK. FILTERING DEVICE. 17. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WTH/N 30 DAYS AFTER FINAL S17E STAB/L/ZA77ON OR ES-9., THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. BE MADE IMMEDIATELY. 3.05 1992 3.11 Pared construction entrance for erosion control plans 1992 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) t. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MAX. /%, i �� �,I - I I / FLOW � . 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. i FLOW 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, Sherwood and Wyant TEMPORARY RIGHT-OF-WAY DIVERSIONS VDOT //1 COARSE AGGREGATE 10' 04' 6, MINIMUM TYPICAL GRAVEL STRUCTURE COMPACTED SOIL - --- ", 11 tg• MIN' I I 6, MINIMUM . TYPICAL EARTHEN STRUCTURE Plate 3.05-2 Source: Va. DSWC Plate 3.11-1 STU`L - 70' MIN. CONSTRUCTION ACCESS 3' SW-2A ASPHALT TOP COURSE MIN. 21A AGGREGATE BASE STONE 70• MIN. CON5TRUC7INN ASPHALT PAVED ACCrr•S , %70 7 WASHRACK 27[ I2Z 12' , 1. M__� , - I 1, POSITIVE DRAINAGE -MUST EXTEND FULL WIDTH A it TO SEDIMENT OF INGRESS AND EGRESS OPERATION TRAPPING OLl'ICE ELM 12' MIN, 2% PAVEMENT EXISTING PAVEMFNI- OSIIIVE DRAINAGI 0 SEDIMENT RAPRNO DEVICL alK�_ rP-TER C17'11 % _.'.- SECTION A -A 1 tltimuri n wale lap of I me h ttmel be atrhlMcd tstlh a Itallummt I ut(Il ball. ock >hlsoHcahe stgp>hvlu a wadi hose xTtli a thautelrl of I ' mthes tot adetplile Loiwtud piesslse. WWI walei turret be valued awac 110111 the elthauce to au appios'ed .efts-- s ea to tcau(n•e se(IuuetW .Ill .'eduueta shall be pt et'eited h out eNlamY storm drams. ditches of watacotuse PAVED WASH RACK CONTRACTOR MAY SELECT A RETAINING WALL MATERIAL/ DESIGN EQUIVALENT TO ANCHOR DIAMOND BEVELEDI k .. mwrt I wares o11111 L011 F KMINI M �� Moho,TM Diamond® / �L -NFORCEMENT CONNECTION _ (NOT TO SCALEI • I 106°ry V umenaeewrlsn.-�I ,. awa �IM,waL .a.� F F"AOM L- re .�L�L1�.MF ...F . F ��, r-�-� AnctO,rTMD..�e / X \I:I EXCAVATION OVERSIZWG A chor-Di.d'. X TYPICAL BASE PREPARATION WX(NOTTOSC ) •--"..im..v........i.. Co1PACM SOIL � Y__ S' MumfWt te' to. I- e' stalutm --- DD TEMPORARY 18" DIVERSION BERM GENERAL SLOPE (3:1 OR LESS) PER ACRE TOTAL LBS KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. PSOPERMANENT SEEDING SCHEDULE NO SCALE STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) TABLE 3.31-A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application pH Test of Agricultural Limestone below 42 3 tons per acre 42 to 5.2 2 tons per acre 52 to 6 1 ton per acre Source: Va. DSWC 3.38 Source: Va. DSWC Plate 3.38-2 to I- z W O U z O_ (A O cIf U On LLJ Z o U)cc z J Q O LU y Io-o- CO^� z a W .. cc W H 0_ O I]] W > LLI ce CI .� W N N N N � N CD � N o 0 N 'D M � � \-I a0 ^ CD N L9 7- M M CY) z M � 4 Co I N 0 CY) N W N Q W LU zJ > J U) IIIIIIIIIIIIIIIIIIIIIIIIIII LU �__ O L9 J zU W I w H Ul - L.I.. zLi I..L ` �`^ � U) jLU NL1J 0�L/ j L.1_ 0C:) O N U I W 0_ z Q _J C- '/ G V\ ^/ 1 ` T_1 06 too \T_1 i U 0 co I_­1 0 co VJ J W 0 ,, W W > Q ^ �^/ 0. a z VJ W . 0 z JN01 LL 0 U CW 1 G 0 1I vJ W1 0 0 W JOB NO. 182150 SCALE N/A SHEET NO. 3 NOTE: OUTLET PROTECTIONS SHALL BE INSTALLED � / / ,, � � / / } \ �� \ ■ WHERE DIVERSIONS ENTER THE TEMPORARY SEDIMENT / /♦ / TH �F� / / �, " / \ ■ BASINS. ALL TEMPORARY OUTLET PROTECTIONS SHALL BE v / / ♦ / / �5 �� j 4'WxIO'Lx2'D & SHALL CONSIST OF VDOT CL. AI STONE. ® ', PkOP6SED i6 DIVERSION .I M ATC H L I N E -SEE SHEET 5 v /♦ 5 % / �SCOTT R. LLINs z CONTRACTOR SHALL ENSURE \ O - O i-r i A / / /♦ / /� / POSITIVE SLOPE IS MAINTAINED. / � ` I � � / ♦ � � � � / / / BERM SHALL BE STABILIZED AS A Li Lic. No. 035791 ,� / FIRST STEP IN DISTURBANCE. �� \ A /I� / / / ADO 2/4/22 \TEMPORARIY UPPER..jONAL E�O� ASE IDVERSION, PROPOSED T E F DA=3.24 ac. i PROTECT�O Q A \ A �. \ \ SOIL BOUNDARY, \ / SOIL TYPE / - �♦ / / �_ / / DIVEDRASIO $,DPaHASE c. I \ 50IL TYPE --- DC TYP. "y-J/� ✓ / % ♦ �i ,� / / �� ♦ // // / DIVERSION, PHASE I,- ♦ / -.� / �_ DA=3.69 ac. 4w.� \O ry N �/ TEMPORARY UPPER ��i� �., / - / - / 0 if PHASE I DIVERSION. / O ZO Z DA=3.55 ac. / / Z w O SEDIMENT BASIN 'B' /DA=14.00 ac. / ♦ // / / / / / o W W or o�w � Lu m . V I I I \ \ / �� -- - - / -- - ----- ♦ 00 /yOSE TREE / w (� ,� Lu i, o F Q Z g 0 g I� STREAM I I \ / 39D A ♦ �.. / / / U U O V U SOIL TYPE � U O / / ✓ / / (A c0 w O - -�. LIMITS, TYP. �� I - - ♦ - / '� < ! w z V \ / z p CONTRACTOR SHALL ENSURE ' i� ! / /: / j O Q w U UO O POSITIVE SLOPE IS MAINTAINED. D D� .'. i / ; �/ / ,P"., co � w w \ \ \ WIRE BACKING �■ D PROPOSED 18" DIV�RSION. / BERM SHALL BE STABILIZED AS Lu > PROPOS J � ED SF W 5 I / ■ CONTRACTOR SHALL ENSURE f /) / AFIRST STEP IN_DISTURBANCE. --- - - �, / '� % / r. w Q Q POSITIVE SLOPE IS MAINTAINED. _ j �/ \ — - / T/ / / a w L E FIRSTBE STABILIZED AS LuLu STEP _ \ IN DISTURBANCE. A Luw a wLy ce w /PROPOSE �A A \ / / / w w V GREENNkAY,� P. \ \ V / ♦ �� w > w w 'V TPROJET LIMIIjs, YR/ 1 \ / ♦ � � PRESERVED STEP \ \ / \ _ / ♦ c,5 SLOPES TYP. w I,� ��W V��� _� ♦ �� /_ / �� ♦ // �� �// / / o �M .. �� .�-i t0 CD N \ i — DRAINAGE DIVIDE,fY� \ \ \ \ ♦ / ��� t / \ / < PROPOSED LIMITS OF I �' ./ \ ♦ •/ �Av �. DISTURBANCE, 26.25 ac. TOTAL i,. i A P� CmCUUOPOSED L RTTOBEUEDDURINGP-- �O�OS�DGt�ENWAY,- YR. P. co �.� I �. \ / PHASE I FOR CONSTRUCTION / -� .. - .... / / > / / I / �� �♦ B TRAFFIC /CROSSING / - / / / Co PROPOSED SAFETY FENCE, `. A /�� ��� / / / J l N W . i OR \ INSTALL SIGNS "WARNING SAF - -� -/ / - / / / / / QUICK SAND, KEEP OUT" - � / � � � � �. � / � / / � / / / 3It 7 OR / �low 00010 l�"� _ /REAM LIMITS, TYP. N WETLANDS TO REMAIN D BAFFLES / 1 \ UNDISTURBED,SSF 55F 5 e r _ / / / / / / / / / / / O J / / / \� 1 SSF SF 1000, / S PROPED SF WITH _ ..6SWIRE BACKING.. ■ �y5 / / // / // /// // / / / W > O 0 \ sF/SSF �� ■ / / / j \ / / / / / / / / / / / / / Lu \ / �. go'� RAL BUFFER ALONG- � - _ ■ ' PROPERTY PERIMETER --7/— / CONTRACT SHALL INS ALL A R/W/ LuT� U \ i W DIVERSION ACROSS THE STONE - / / / / / / / / / / / / / / / Lu 06 F— CONSTRUCTION ACCESS ROAD. /..,. - / ^ YR LIMITS OF FEMA N 11 ,..'I�•'�s / ../ L9Lu1.. I/ / / FLOODPL D �oTYP. LL _ PROPOSED LIMITS OF N w _ �' �_; ♦ PROPOSED CONTRACTOR DISTURBANCE, TYP. PARKING &STAGING AREA U —� COI PE3 D �.._., �` ,. A y L CATION OFzSCY DUMPSTER PROPOSED 18 DIVERSION ♦ O I PRWIRE B CKF N I H 5 CONTRACTOR SHALL ENSURE / „ _ \ - / . I y� I LU WIRE BAC�CINC� POSITIVE SLOPE IS MAINTAINED. / / I \ O � � BERM SHALL BE STABILIZED AS 111 _ EXISTING TREELINE. TREES & VEGETATION IN THE \ R P S D - AFIRST STEP IN DISTURBANCE. l` I I \ �1 .�° VICINITY OF SEDIMENT BASIN B SHALL BE CONSTRUCTION CRS LOCATION OF PORTA POTTIES W W CLEARED. DURING THE EARLY STAGES OF ESC CCESS - � N I\rnp� PHASE I, CLEARING & GRADING ACTIVITIES SHALL LO ATION OF FUELING AREA BE LIMITED TO THOSE NECESSARY FOR THE \ ,� y „y. fps INSTALLATION OF THE ESC PHASE I MEASURES. PROPOSED CONC. � %' Y- ..THE FUELING TANK SHALL BE COMPLETEL SURROUNDED BY A - W W W I I . \ \ \ \� LLJ Lu "T WASHOUT AR€A-`3,- ----- _ - -z DEEP,z WIDE EARTHEN BERM WITH AHEAVY MIL \ S ys - —Lu u POLYETHYLENE LINING, OR BE PLACED IN R IMPERVIOUS `�, Cp, "`����vvv I \ \ \ \ \ V A rOPEN TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER � � A � _ ((��y))� A �; y � SHALL CONTAIN FUEL IN THE EVEN OFASPILL. CONTRACTOR SOIL f�PE � BM SHALL ENSURE VOLUME CAPACITY IS io%LARGER THAN THE \ \ \ \ \ \ \ 16 \ySg MAXIMUM VOLUME OF 5T ED FUEL l _ VVV v \ _ 0 TJui CONTRACTO4 SHALL INSTALL A R/W DIVERSION ACROSS TH ._ D � CONSTRUCTION ENTRANCE -- s I� �I W W W W W WWW WWWW WWW' I I I I / \ ____------ PRO 0 ED PAV D2"ONSTRUCTION ENTRA CE "' "' "' IW "" "" '" '" / < \ v�� v � -- -EXISTING z" CMP CULVERT � � � \ izx o MIN. w/WASH RACK &DOWN GRADIENT - EXISTIN / � I I CE SEDIMENT TRAPPING DEVICE TO TREAT FLASH \� _ \ \ \ RUNOFF FROM VEHICULAR W'ASHOFF,1 u L i GRAPHIC scat v U F_ / \ - w �� A 5 \ W W POLO�O ��— \ � FE T GROUNDSROAD C s�\ sIN s \ \ \ I inch — 3011t:, ,� A 82�Jr0 NARIgBLEwlDTH �s \ SLOPES STEEPER THAN 3:1 SHALL BE PLANTED WITH A NATIVE SCALE / - `sue \ \ \ \ \ \ �� SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS ATA RATE OF 6o LBS. PER ACRE, OR i 1 it =30 ?--- \ \ \ \ \ \� \ LB. PER i 000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS p 0� ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO SHEET NO. 48" CMP CULV RT V \ \ \ �} �� � REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH \ V� \ STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED z:i, AS SHOWN. 4 PROPOSED S WITH .o WIRE BACKING s ♦♦♦• �— •�� ss MATCHLINE - SEE SHEET 6 'AN so ♦♦`%WIN .0 � / I Sao CONTRACTOR ♦♦� PROPOSED i8 DIVERSION.... Q ♦ •® �� Y /� �� i ,'♦ II OR SHALL ENSURE S / - /♦ POSITIVE SLOPE IS D / F / / - T S F � ♦ I D�INAGE � � � / / � , ♦/ MAINTAINED. BERM SHALL BE ♦ l / / _DIVIDE, TYP. / / SSF LIMITSE FEMA STABILIZED ASAFTU,RBIRST N IN SF 0 ♦ �% ,�� ���� / �/ / APPROVED zoo VR - -' DISTURBANCE. / 55F .�♦ / ' �'� � • \�F � S / �// • I � � / / / I / FLOOD LAIN,TYR. 5 ���♦ / / / ��� F SSF 00 PRESERVED STEEP �/ SF ♦ -�y�'� �,� • SLOPES, TYP. —�.. ♦� V A \ / / / �4 �� ♦- �� _ i r 00 / / IMANAG D STEEP/ / \ _v[ l I I I. SLOPES, TYP. A 00 _ 00 SOIL TYPE \ 1 \ \ \ \\ ( / ,iFJ � ) f 4D � I ' SOIL TYPE 00 SOIL TYPE PROGPOSED STOCKPILE A ` `y\ i � 27B PROJECT �/ - 4� ` �3- rs' . LIMITS, TYP. �� / / I r-.�' SURROUNDED B SILT FENCE V- _ _ _ _ _�� / / �/ �J / �✓ If GRE/, TYP. / / I \I PROPOSED IENWAY� 1 60� A , PE T CO -STREAM - ♦ J LIMITS, TYP. Ar cc�L_ I IIi N //t�SOIL BOUNDARY, / I I �' ---- -- -- �/ ®'/ i / l / l / l ) � / 14# / / 00; PROPOSED TREE TP I I I I PROPOSED i8 DIVERSION. / / / / / TS — ' PROTECTION '^ ■ W O I 1� I I f CONTRACTORPOSIT VE SLOPE RS/ �D � / / I \ � I _ - 0 ■ I I I MAINTAINED. BERM SHALL BE i \ / / / / / / ' 11, -'/:b / / 1♦ / / / / / / l IF -- / r DIVERSIONrPHASE I PROPOSED LIMITS OF I �� ♦I I I I I \ I / / DA=3.69 ac. / 39 / I f DISTURBANCE, TYP. ♦ V SOIL SEDIMENT BA�iN rBr / / / ♦♦ / / �5 , 4 I -- DA=14.0 ac. � _ I I ♦ / I OPOSEDSF WITH I I / %" / TEMPORARY UPPER I WIRE BACKING PHASE IDIVERSION, S DC DA=3.5S-ac. � � �♦ �5 � I W TLANDS TO REMAIN ♦ I ) I / / I ICI 1 ' / SOIL TYPE -� / i - / / / ♦/ / / / SS PRWPRE BACKI GI H ' �I UNDISTURBED, TYP. �� ♦� I / l/ 34B ,r� �i DRAINAGE / , DIVIDE,TYP. — ♦ 1 f / YYY TEMPORARY UPPER I � / / _ -- � / / � � � � /• / � � � � � , ♦ PHASE I DIVERSION,DA-3124 ac. /000, ♦• DIVERSION, PHASE I PEw. �I DA-2.89 ac. / /� PROPOSED 18" DIVERSION. / \ CONTRACTOR SHALL ENSURE \ y W I �� ■ I \ I ) \ - I / / POSITIVE SLOPE IS MAINTAINED. D , BERM SHALL BE STABILIZED AS / "./ � � / / • / / / � I � A FIRST STEP IN DISTURBANCE. '// � - / � / / /♦♦ / i � �' _ PE / W � , Ps48 / i ♦, �� ♦♦ / / / / �' ,, / i / \ I \ ��/ Ik I \ \ \ \ \ \ \ \ \ V A \ .0l PROPOSED 18DIVERSION. \ \ \ \ \ , \ \' \ \ \ \ , T ' / /♦ / / / PROPOSE ITS OF CONTRACTOR SHALL ENSURE - - POSITIVE SLOPE IS D \ I� \ 1 Y / , / / ♦ / / / DISTURBANCE, z6.z5 a[. TOTAL - —� \ \ \ I \I II II I ♦♦MAINTAINED. BERM SHALL BE STABILIZED AS C DISTURBANE.\ SOIL TYPE i �'�'_A \ _ 1. I ■ I ....... 3o' NATURAL BUFFER ALONG - I PROPERTY's PERIMETER - I LL I I \ �`, \ \ \ \I V I / / /♦ � i \ \ \ ■ \ \ \ \ I� \ \ / / / i ���� / / GRAPHIC S Li \ So MATCHLINE - SEE SHEET /. �y5 / / / / / �{ FEET > ON. I I \� \ \ \ TS I `� - - / _ NSUPE �i A 1 inch = 30 ft. / SCOTT/R. CbLLINSZ Lic. No. 035791,E 2/4/22 c L z w ; 0 O F V Z O 0 (� OU U f F Z o (n W J O O . w Ln F- mL H Za cn' w < aI oIt w > W Lu` C of � �y t\O N O N C'M " N z No Q z N ^0— Q L.L 0- J O > z > O C/) Tl U Lu z O QO "' 0 U ' U w z Y O o w J � m � U) ___I w r—I F I w = w Lu � Q cn p a- IM..L Lu LJ_ ® O O N U w F- G w w JOB NO. 182150 SCALE 1 "=30' SHEET NO. 5 �\ HERE DIVERSIONS ENTER THE TEMPORARY SEDIMENT / _ j / j / ! / - _ / f / SF / / L I M- / /' J ASINS. ALL TEMPORARY OUTLET PROTECTIONS SHALL BE y /p�TH ���j / �_� AT qTr)Klr v / / / / / _,SSF OILTY E1 C) S w M1 / / / / / / , ... _ - P OPEN DSWM-ORESTS p / �. �' S 28D3 / / / �� / SSF i / ! & S ■ J i / — ♦�SCOTT R. LINSZ T / i-_. i .. ICE.EASEMENT_, / / 55F9 •' / j O ti � p� / • �� / � � �4f#� U Lic. No. 035791 � PROPOSE SWIM FOREST & OPEN j mil. / _ / i �S S5� S / / "�,,p 2�4�22 / / / / PROPOSEDTREE T ' / ,i i PROTECTION / , P / SPA EASEMENT AREATO/ / ! i ♦� L� 1 �f � / REM IN UNDISTURBED, TYP. ZONAL E �l / JU - - .. _� ... S • / S 1� /D18"DIVE _ / / / i / // / /F ■'_``�� ♦♦ / S G -PROPOS �� PROJECT LIMITS 1� / / TYP.r� / V / i - - � DIVERSION. - � � ` � _/ - - � - - - - - - i - � - � - - - � SF /55� � SOIL TYP CONTRACTOR SHALL ENSURE -..� 39E POSITIVE SLOPE IS MAINTAINED: 0 PRESERVED SEEP , - S o� BERM SHALL BE STABILIZED AS - �. • / / _ ---- --- --- A FIRST_STEPIN DISTURBANCE. z SLOPES, TYP. / P �� •/ / / _ / / l _G y J SED - / / .+!'I/ _ .. / _� (^ /_ PROPOSED SF WITH SS - //.. ... _ ..SSA / —.� / / / / _ / / / ♦♦ / rg C M 1 GR NWAY _ / / /jh -/ WIRE BACKING 5 / / / / / / /♦ n1Di C 17-4 21 \ /. sSF� F �■■■■N—■S■S■■F■■," �SF• � � 00 / ♦o— aSz z �r / S / .� S SSF S •1 / / / / / / / / \ / / ♦ p V) vI SSF �• % / / / V S F i x Z w z z Up 0 DIVERSPHASEI U/ , 0 A=4. 5 ac.�Lu Z z _ o < w U 0 o T / �� / in Z m Jcif < cif W W W ��♦ SOI39E TYPE / / Lu W w / ca ♦ �' / - / b / / Lu J CoQ J W T LuJ i /�6 m w a a LV w a cif w � W W� W �^�■ �� / / / / / / / / / / Lo w o En ul) cl� Cr `WSW LL �I■ / / / / `��/ / // / �/ / / i / / / � I OP y/ ANT , �■ i / / / / / �� / / / / / / / / / / f / / / ��� / y / / o �Mr4 p �O O N iX rl , a I ANT /t / XIS ING TREELINE. TREES & VEGETATION IN THE VICINITY OF SEDIMENT 41/ w 1 1 N BASIN 'A' SHALL BE CLEARED. DURING THE EARLY STAGES OF ESC PHASE I, CLEARING & GRADING ACTIVITIES SHALL BE LIMITED TO THOSE / `� / / / / / SOIL BOUNDARY,_- �� NECESSARY FOR THE INSTALLATION OF THE ESC PHASE I MEASURES. �� / / TYP. / , / --� ♦ vi r / ♦ % TP co 1 M V � / / J / / / PROPOSEDTREE 00010 PROTECTION 0)� / z SOIL TYPE t / \ / / N y / / / �5 / /to y M 010 WETLAND T REMA 1 . I PRO O ED / / ♦ /" / • - UNDISTUR1B,�ED�,TYP. BAFFLE / �/ / / / �� 1 / / C� •• N �YKVPOSEDIAF FENCE, \ A / m� � - " (] /INSTALL SIGNS "WARNING A s / �♦ \ QUICK SAND, KEEP OUT" ♦ \ SBA' / I - Z SEDIMENT BASIN 'A' / l �I � ` 1� I/ �' �• ••• •• ♦ dDA-8.56 ac. I • PROPOS&LIMI SOF ' DISTURBANCE, TYP. ♦ \0 > SLOPES, TYP. � ••V) MANAGED STEEP SOIL TYPE > rill` dROTCL.A� � /.�� TS / � •� / RIPRAP LINED EMERGENCY ( �� I \ / PS I _ I / J / / ♦ . I] v 0 OSED 3o'WIDEV Ti U SPILLWAY W/ 4:1 SIDE SLOPES & \ ♦ \ / _ - f ♦ ■ �+ LL.I 06 FILTER FABRIC UNDERLAYMENT. �\ ♦ \ / / / / ♦ ■ SPILLWAY CREST ELEV.=3 i,67. 1 \ /�Lu Vs STREAM ySS ♦♦®� a e I ♦� / Q LLJ - LIMITS, TYP. ". N DIVERSION, PHASE I ♦ t / / �� �� ss. O I --� — ��� / I ♦ / t / Y /��/j� = ♦♦ �1 / / / / w "/ as 4P#� / ♦ I �3r / T PROPOSED F O _ _ ♦ / LIMITS OF I i t / / jet / DISTURBANCE, /// -' z6a5 ac. TOTAL. ;- POSEDSIP ING ® SOILTYPE WIRE BACKING SyV 27C � '� / �� � t t / � LU S t t I --I O - �y y ♦ / t / ' / t Zz ul Fill: Lu Z Lu O/ �� L ���PROPOSE TREE S ♦ / I / t Lu Ul PROTECTION / ys / PROPOSED 18" DIVERSI6N. Q PROPOSED 18 DNERSION ` �' \ ♦ _ 1 / t CONTRACTOR SHALL ENSURE O Z CONTRACTOR SHALL ENSURE / ♦ _ - t POSITIVE SLOPE IS MAINTAINED. D �n (� / y / ♦ BERM SHALL BE STABILIZED AS / T / 'POSITIVE SLOPE IS MAINTAINED. �, ♦ / / A FIRST STEP IN DISTURBANCE. / - BERM SHALL BE STABILIZED AS \ sf ® —\ ♦ / / Lu - - A FIRST STEP IN DISTURBANCE. SOIL i D PE � ®®® �! ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ � I / � � 'SEDIMENT BASIN 'B' O ys Q ♦' 3 .� ` •® / . 1 DA=14.00 ac., / S PROPOSED SF WITH O �.. �� ��� ••/yss ® \ ♦-- -PROPOSED BACKING N DRAINAGE • / �. l / w \ yg r.• \', =\ �•• 'ASS \ DIVIDE, TYP. .� ♦ ' j / / IN** \ - --- u �4111 IN •••� �I4# SLOPES STEEPER THAN 3:1 SHALL BE PLANTED WITH A NATIVE \ ■ ■ A ) ♦/ _ / / / r �� i SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i I / A JOB NO. / LB. PER i,000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS ARE HATCHED ON THIS SHEET WITH ABM'SYMBOL AND ALSO � ♦ � / / GRAPHI� � 182150 SCA E/ / / / \ t / REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH / / / 1 �/ � � ��/ 30 0 a5 �30 / 60 � � � SCALE / STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED 2:1, AS SHOWN. �� 1 =30 _SSF— F\ MATCHLINE — SEE SHEET 5 ySS i / c IN FEET > / / / \1 / / SHEET NO. S 1 inch = 30 ft. / PROPOSED S WITH / / �� ■ _ ' SF S J .� / / I / I / ' 6 ASINS. ALL TEMPORARY PORARY OUTLET PROTTECTIONS SHALL B 1 I l \\ \ \ \\\ -- — ' / �C SEDIMENT E �] AT STONE W a ! NTERMEDIATE RIDGE ( OINCIDING-WITH �, IW �� ATCHLINE - SEE SH 1` \, PROPOSED BERM) LIMITS THE DRAINAGE AREAS PROPOSED z8 DIVERSION. I \ ° TS I TO DIVERSIONS TO A MAXIMUM OF 5 ac. / - i CONTRACTOR SHALL ENSURE �„ � ♦ I A I - /SCOTT R. .INS `I-. POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABI LIZEDASA W FIRST ST�P IN DISTURBANCE. // / / �. 't',� ti z PROPOSED E I / ® i _._/ PROrEcror �� B / DA T BASIN B // 5� z � r / SEDIM I I l I I ! 13.96 ac. l 1 I PHA�E fI DI RSION- I SHO MIM STHE C I I _ 0 _ _ p ITE's RI�UGH DING. I� �PROPOSED i8"DI RSION. � � �..�� DIVERSION DA= 4 as f0 - ' � CONTRACTOR SH CENSURE / - / / - / ,� N o POSITIVE SLOPEI AINTAINED. / / ✓ f r / N -per BERM SHALL BE STABILIZED AS FIRSTST PI ISTURBANCE. I F z � F__ IV RSIO PHASE II .. ....... I / w e. I I // /// o w a z z DA OSa I ��/ _ / -. �.� / / / U z F z m V) w V) -_ I I �• I �� � 4.0 P PROPOSED TREE. / O �, Lu w m ' r \ PROTECTION - / / / / / / / = O � STREAM I' I / U OU O o L LIMITS TYP. I II I ^�� I ��I \ I�� �.,., �� Ln co Ow y � I �� �� /�� = o o 5 0 PROPOSE �I I I _ • - _ // ui _j O .- .Cr WIRE BACKING I I I 39. - D F / / / / / ~ Co w w o \; J Co m I, , / �,lo� a - -- - Lu w i----_ l // I Im • MLu ` I I 1C dgk PS - i - / f.. -� ,� // ce p r / PROPOSED 1 T \ I� - _ -.- - / / / / / / / / > to 0 U GREENWAY, TYP. I LLj PHASE II ZVERSION (o / /,. / o_ wISE w o I I SHOWN MIMICS THE �� I II SITE's ROUGH GRADING. �.. �� \ ♦ I DIVERSION DA=4.45 ac. PROJECT LIMITS, 'I I II �� \ TYP. \ �� I(y��V I I ■ e / / SLOPES, TYP " i I I I 1 1 i w N "'' N N N � ( WWW 9 - • f / / D N DRAINAGE DIVID W 38 I i PROPOSED LIMITS OF / - / 1 / / / / II - PHASE II DIVERSION, - i -DISTURBANCE, z6.z5 au TOTAL. �/ L9 I DA=2.81 au � o PROPOSED GREENWAY TYP. i U ' � ' �WWWWWWWWWWy-WW\�I) `1 �� � � ' ' � • �; � -' M y I • PROPOSED SAFETY FENC , ' / / / / /// / / / / / / / / / N o W W W I OF INSTALL SIGNS "WARNING / QUICK SAND, KEEP OUT" I A n W W ' ��� CONTRACTOR SHALL INSTALL A UNDISTURBED, REMAIN 1 PROPOSED BAFFLES �. yyi. RIW DIVERSION ACROSS THE STREAM LIMITS, TYP. / n UNDISTURBED, TYP. I m � � � //�// / / N � > S + �CONSTRUCTION ACCESS ROAD �/ / CDSSF PROPOSED KI WITH \ • SF S�' I ■ °� , WIRE BACKING (� \ y W w Op 3 N'ATURAL BUFFER PROPERTY's PERIMETER ,'� �''� - �( // /�/ J /� U •Lu l I ••��� r �06 /� w LI ITS F MA I •'�r' r .... � . � .. .. .. / l / / / / l l to o Y pl�lr VE oTYP. � I •� 'h�� r / � 3 �� \ L9 J I --I 0 ���L°( t -f y /��� L - PROPOSED LIMITS F ail b ■ DISTURBANCE, TYP. N\ °j PROPOSED CONTRACTOR / / �I q PARKING &STAGING AREA / I / / / I I I I I / / / U r , W o / _�\ �-/ 1 I I E • i �y L CATION OF iS CY DUMPSTER �.,. .� PROPOSED SF WITH SS • / _ / i . \_W .W .�. I / l I I I I I l / I I I I I� i.. w ��p'� o WIRE BACKING „F . R OSED -. �.. I 00 ,...y.. ,�..,�. I I I I I I I — n CONSTRUCTION CR OCATIONOF.PORTAPOTTIESLjj �'_ /�lo� a \ \� / Q LOCATION OF FUELING AREANo �� H z PROPOSE CONIC. THE FUELIN�TANK SHALL BE COMPLETE. SURROUNDED BY �� +t I I / / C�, \Lu \ / A Lu S \ ��, ASH UT AR A - z' DEEP, z' WIDE EARTHEN BERM WITH A HEAVY MIL I ' �J \ W z - POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS \ I Q OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER � LL w \ yS SHALL CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR „ SHALL ENSURE VOLUME CAPACITY IS za%LARGER THAN THE (� \ �\ ��-\AMAXIMUM VOLUME OF SED FUEL... 1 / I I C o - - -� > / w m I � . 5 CONTRACTOR SHALL INSTALLA R/W DIVERSION ACROSS TH --- � S CONSTRU�ION ENTRANCE I �\ T - - -- -- W W w W W I I I I I \ \ o Tmmj y _ — 5 " / _ W IW W W W W \\ \ / WW W W�I IIII I � � O / - PRO O ED PAVED CONSTRUCTION ENTRA CE I I I \ N ----------- J \ I� --- -EXISTING 72CMP CULVERT \ - _ \ (iz x7o MIN.) w/ WASH RACK &DOWN GRADIENT CE SEDIMENT TRAPPING DEVICE TO TREAT FLASH — H RUNOFF FROM VEHICULAR W6 H GRAPHIC SCAL � \ 21 � 2 — w E s 30 0 ¢5 30 O U \ I \ w 3 I w � ��� \ I A JOB NO. _ s s IN FEET \ _ POLO GROUNDS ROgp � _ 182150 �'T� \ 1 inch 130 ft.. (VARIABLE WIDTH c �c �o \ \ SLOPES STEEPER THAN 3a SHALL BE PLANTED WITH A NATIVE SCALE n �� \� � _ �// _ ` s 2 SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST �� \\ \ of FX Eo CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i N ( E 643 / \ \ LB. PER i,000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS = ®�° �\ \ \ \ a \ \\ ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO SHEET NO. n �� ® ® XISTING48"CM CUL RT A V A � � �REOUIREBLANKETMATTINGINACCORDANCEWITHTHEVESCH mow — B �87 P ®� \ \ \ \ \ \� \ STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED z:1, AS SHOWN. 7 PROPOSED SF WITH WIRE BACKING S SF S N o � / 5 ��• ��� � SF - _MATCHLINE -SEE SHEET g � , � •� � .. �� t • Ol �S ■ PROPOSED 18" DIVERSION. ' CONTRACTOR SHALL ENSURE y E 3p SSF POSITIVE SLOPE IS D_. O SF - / • DRAINAGE / / z MAINTAINED. BERM SHALL BE SS S- . % O LIMITS OF FEMA / STABILIZED AS A FIRST STEP IN SF 26 • DIVIDE, TYP. �_ SSF . 1 APPROVED ioc YR DISTURBANCE. FLOODPLAIN, TYP. PRED S EEPssF . -�� _'. +� �` ♦ SLOPES, - �� - SLOPEO .Wool : 430 / MANAGED EEP_ SLOPES, TYP. d6 PROPOSED STOCKPILE i PROJECT �h ® SURROUNDED BY SILT FENCE �LIMITS, TYP: / ' p PROPOSED GREENWAY, TYP. / BM \ \ 1 -- --- y � / � � � INTERMEDIATE RIDGE / I ✓ ,COINCIDING WITH LOTS) / - I 5. / AREAS TO DIVERSIONS TO 1 ` A -MAXIMUM -OF Sac. -- O --- Irvv 1 O �. � �^^j,TH / O Sc(0 R. LLINS'Z L-) Lic. No. 035791,E 2/4/22 �SSIONAL E�C1 r c Lu F w � C E O LF z 0 J z d Q C U ' � Z W C J / O Z J Q C t u N w CO L > Z Q c u d `L 0_0 w Ln W we L L I C14 M I r'j W Lu w d' —STREAM h. I I I �/ i / _ ♦ l -__ i LIMITS, TYP. ' ��. / � i - ♦ � i BMA O I / T w N •-� N N N I ® � 428 O PROPOSED TREE � PROTECTION TP ® �' TS ___ � / � / / � � • � � � / _ / � / SEDIMENT BASIN 'B' / O DA=13.96 ac. ROPOSED LIMITS OF � DISTURBANCE, TYP. BM / H 55 CV P WITH WIRE BA WIRE BACKING SF PROPOSED SF WI H WETLANDS TO REMAIN J - / / / DIVIDE, GE 0000 0 / DRAINA E G % UNDISTURBED, TYP. I ' / I I, _ ' / � N Q I PROPOSED i6" DIVERSION. C TRACTOR SHALL ENSURE / / �� / N D POSI SLOPE IS MAINTAINED. / / , ' Q J BERMS L BE STABILIZED AS EIN RST ST DISTURBANCE. V) I W W W N � J r-I INTER % O MEDIATE �h N (COINCIDING WITH LOTS - ® / /� / L.1_ 0 LIMITS THE DRAINAGE s`? f / / y - - - _ W / AREAS TO DIVERSIONS TO U OF 5 at. /r V� / / _ i - y QV IW A 4z0 0 5' `z INTERMEDIATE RID COINCIDING WITH U uj BM \ / / PRO SED BERM) LIMITS THE INAGE AREAS / / / - (%) J W DIVERSIONS TO A MA UM OF 5 ac. ,.'�y5 i W , � � � F__4 i' ASE II DIVERSION Lij SHOWN MIMICS THE /� _ _ _ / O ., ., 0L SITE's i2DUGH-GRADING.-- / �55 O Q DIVERSION DA=4.14 ac. PROPOSED 18" DIVERSION. � / � PROPOSED LIMITS OF CONTRACTOR SHALL ENSURE --- - MM POSITIVE SLOPE IS D DIVERSION, PHASc II DISTURBANCE, 26.25 ac. TOTAL. 1 � � \J \ -- // --- �6 / / _ �� —__� W W MAINTAINED. BERM SHALL BE DA=2.05 a STABILIZED AS A FIRST STEP IN �n ' \` O / / / �+/ , �� n0/ ' DISTURBANCE... / Q h r O 3o NATURAL BUFFER ALONGO PROPERTY'S PERIMETER O / � / - PH E II DIVERSION 400 _. SHO MIMICS THE -. 4z j � GRAPHIC SCALE / F- SITE's RO H GRADING. y�. / _ / \ DIVERSION - O 30 o i5 3o bo w JOB NO. I I IN FEET) i 182150 inch = 30 "fit. SLOPES STEEPER THAN 3:1 SHALL BE PLANTED WITH A NATIVE SCALE \ \ \rl SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST I 1 If CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i PROPOSED / / / LB. PER i,000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS \ \ ♦ INTERMEDIATE RIDGE ( 0INCIDIN� WITH / / ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO SHEET NO. SED BERM) LIMITS THE DRAINAGE AREAS M ATC H L I N E - S E E S H E ET 7 f 5y REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH o SIGN. I } \� o TS i '� e 0 TO DIVERSIONS TO A MAXIMUM OF 5 ac. S SIGN. _ ♦ STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED 2:1, AS SHOWN. lll \' �GRQQPHIC SCALE HERE DIVERSIONS ENTER THE TEMPORARY SEDIMENT / � �_ / � - _ _ � � l � M / ASINS. ALL TEMPORARY OUTLET PROTECTIONS SHALL BE �`_ r / 30 /0 a 30 60 W/ - J F W �-% ,; -� �- - PROPOSED SWM FOREST & SSF ( IN,/FEET SCOTT R. Ct'l NS`Z TT s - - - 1 Pch = 30 ft. / i.� Lic. No. 035791 J_ /_ - - % - - OPEN SPACC€-EASEMENT SSF T U :ri /PROPOSED TREE / /SSF /. 43 / / .00 2 4 22 47 PROPOSE SWM FOREST & OPEN / /� / - / - - - - - - PROTECTION TP - / � 414� / ��cl, �� 1Q/ _ / �/ S / F -o / / S101 c / SPA LU EASEMENT AREA TO/ i - ,,// G Vl / REM IN UNDISTURBED :TYP. i<' / PROJECT LIM�IT� - _. I� �. —� J` - / - / PROPOSED 18" DIVERSION. N. / _ / / i SF - - BM �sT CONTRACTOR SHALL ENSURE POSITIVE SLOPE IS MAINTAINED.. D /� / / \ - y BERM SHALL BE STABILIZED AS - �� PRESERVED STEEP - � � � / SLOPES, TYP. A FIRST -STEP IN DISTURBANCE. - � gip` `- 1 - PAS - - / �,. J:' / - PROPOSED SF WITH. S RE NWAY /.. C� WIRE BACKING/ —SSP �. / / • -� SSF �,?SJ�D /. / _ / s --- ---- / /\ / z _-.. SF i p .— ■ F Lu Z / _ / O SSF — y -- / / Z w I- � DIV ION, P E II / / / O SSF o =1.77 / / / T / .A F Q Z • z Q f T / / ♦ / co ylo 4 / / / / ■ V/ w N � _ �' y ��♦ / / / �� 4 / Z w / X- I z / ■ / �/ / f s _ W�� ��■i / / _—_ w rq N N t�0 In O N LL N / w i i / — — wW ♦ V 1J1 S 1 vg1i \ � /♦ / �� p , _ � i � / i� \� j I / INTERMEDIATE RIDGE (COINCIDING WIIH ' W / / \"� ► 'I' / / �� INTERMEDIATE RIDGE I I /� / PROPOSED BERM) LIMITS THE DRAINAGE AREAS - N . G) (COINCIDING WITH LOTS TO DIVERSIONS TO A MAXIMUM OF 5 ac. LL \\ /♦ \ / / / LIMITS THE DRAINAGE M /♦ / AREAS XI DIVERSIONS T�0 / / � � A MAXIMUM OF 5 ac. � TP LL / T PROAOSEDTREE M PROTECTION � 41 � I � 1 �♦ ` � z I I ' � 1 � M � / i WETLAND T ATN �� co 41O REM / SEDIMENT BASIN W / / v UNDISTURBED, R / o f DA=H. J9 8C. PPOSED AF I I 0- Q /INSTALL SIGNCV QUICK SAND, KEEP OUT" CN m z j / �� ♦ J / 4 Q p 6POsk LIM 50F �� OP �/ / t�ii ♦ /1 DISTURBANCE, TYP. \ / ' ' I " ♦ (Lij \ J / 10 \ t MANAGEDSTEEP' �`n ' I / 7` S SLOPES, TYP. // -i F P o O U)__ OPOS,, U PRED3o WIDEV TCL AT o PS TS RIPRAP LINED EMERGENCY ( �� I \ R \ / ry T Lij SPILLWAY W/ 4:1 SIDE SLOPES & ■cz FILTER FABRIC UNDERLAYMENT. A AV // (� �� �- Lu I SPILLWAY CREST ELEV.=31.67'. \\� \ / b� L9 l DA= .71 a,I,V� �� ■ ♦ it '� T� ■ s I I I I I I I I ■ / Q u' \ STREAM ySs ® I I� I I I I ■ T / / Z U cn N I-LIMITS, TYP. W /. �. 06 u Z W � o W W y �� G �� / y;; SWµ 3 � � SSA `•. � � � � � � � � I � ' m 0 W — -- � w cn y / ys v / O PROPOSED � �'LIMITS OF PROPOSED SF WITH S o �' *:■ ♦ DISTURBANCE, / W WIRE BACKING y r a6.z5 ac. TOTAL. u �� w z w 5 / vy - w PR� TREE PROTECTION CONTRACTOR 1 SHALLNSOURE ySS • o \ 1 1 11 / ®� \ - � y I, POSITIVE SLOPE IS MAINTAINED. � � � �s � / F �\ I � (COINCIDING E H LOTS) f � STEP STABILIZED AS - s \ ( SIDING WITH LOTS) IN DISTURBANCE. A �r;:� �� LIMITS THE DRAINAGE , FIRSBERM T - - - AREAS TO DIVERSIONS TO AMA N MAXIMUM O, ® fI DLAG DIVIDE, TYP. /I . ■ ■ ■ ■ ■7 ■ / join NJ 11 / ASS is SLOPES STEEPER THAN 3 1 SHALL BE PLANTED WITH A NATIVE \ o / SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i % LB. PER i,000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS/ / ARE HATCHED ON THIS SHEET WITH ABM' SYMBOL AND ALSO 4w REQUIRE BLANKET MATTING IN ANCE WITH THE VESCH / STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED XCEED 2:1, AS SHOWN ��♦ / 4 / - LL '♦ �� ♦ SEDIMENT BASIN 'B' % DA=13.96 ac. _ 5F— SF�SSF MATCHLINE - SEE SHEE yss �i� Aso SF , 7 ♦/Z C) Q T • J Lu COT / Of U / S PROPOSED SF WITH N WIRE BACKING U F- F- � � w O w N a Ln i" JOB NO. 182150 i / T SCALE 1 „=30' / SHEET NO. i / 9 A ERE ALL TEMPORARY OUTLET TEMPORARY TI s \ y HERE DIVERSIONS ENTER THE TEMPORARY SEDIMENT PROTECTIONS SHALL BE zzz y i A � , - J PROPOSED i8'. DIVERSION. \� TS / Q A 5 - r S M H I S H CONTRACTOR SHALL ENSURE W ,� •- A , C TT R LLINS� //// ---- POSITIVE SLOPE IS MAINTAINED. W \ 3 r / U Lic. No. 035791 � J BERM SHALL BE STABILIZED AS \ STR. z9 \ ,, � —�--� _ •: ,y _ /,� FIRST STEP IN DISTURBANCE. W W s \\ `:, ' - -- -- -- r r / r Po�� 2�4�22 Stv 0 CONTRACTOR SHALL SA T M ORARY PROTECT 0 6o" MH AT THE OUTLET OF STIR 29 IP -• W 8 (INV. TEMP. MH- 37g.z5, S. P�20POSED�TE �.- / - ITV. OUT OF TEMP.MH=379�5) I 4/ i N PR OSED zz5.00 OF TEM ORARY N BETWEEN TEMP. MH & STR. BBiz (11- 79.1 10=37>..87} I Aa',9 r / - / r m ti i / a ° Fn w / v 1 / / \ M 1 / _ / ✓ O F m to \ \ / Z r P PROPOSED TREE O _j w w s QED M NIT PROTECTION z �� DA=13.96 aC. /� �s r. / �� / u v / \ s� - — P \ -- i / / / /� /� STREAM / LIMITS, TYP. �'" I DIV R HA EIII \ / ° .�..... �:. _ / O � z �r r w Z D p ��\ ��\ / - ✓ �� / F- m w U O �'� _ > z ¢ � ST�2. B z Jay WIRE PROPOSED SF WITH SS I ° 6. �.� / 3 s '� / .. d CO £ Lu cr. WIRE BACKING / 3 �� / / Q a PROPOSED / r r > .�. .�. / GREENWAY, TYP. I \ / .. W W � PROJECT LIMITS, I TYP. / A v I / / V / ♦� PRESERVED STEEP SLOPES, TYP / �, / / w c� N N N o 2 I Q ON c W . . � � � r 3.90 3 ♦ � -' / I �.W W w V _ • _ �.. `�. / _ _ _ a ♦ y DRAINAGE DIVIDE, TYP. PROP OS / a W ' V ED LI ITS.OF —DISTURBANCE, 26.25 ec.TOTAL. W W W W y W W W 6r ^ W W W W / L--, \ IP � �,� � �, 3$ ♦� � �� �, ,����;� '�/ // L9 82 PROPOSED GRE - � PR ENWAY, TYP _ j ...♦ M �� I �� �• PROPOSED ASPHALT � / � � _ QUICK SAND, KEEP OUT" � I �. M �\ I w W �' r ♦ / - WD wW DIVERSION �. / %. / - / r V 7 �= W i.� REAM LIMITS, TYP. / \ y. �WETLANDS�TO �EM�IN ,. PR POSED BAFFLES ' T um � r UNDISTURBED, TYP. �64 --�� >, - ROPOSEDSFWITH - /�, -� WIRE BACKINGCN � V A � I A � F / ssF / R � / � I � B � � � �� `•` � � %/;� —�, �'' , � // /rr //� � / � /� � � j / / / � ' � � Lli � H g 3o NATURAL BUFFER ALONG i z I N �w I OP �� _ _ PROPERTY's PERIMETER�� / ��� O ys N� ♦ _ / % / f > U / A o ♦♦ �y �" / ,-� 06 z r� LLJ I // . ^ LIMITS OF FEMA I ♦ �� / / / / l / O VJ FLOODPLAIN,.TYP. LL J APPROVED ioo YR I �� ♦ ri �� �y . �� j / / / / �/ / / / / / / / / l / l l l / / ,--� o -- PROPOSED LIMITS bF ■ u y� / / 1 / I (1) v DISTURBANCE, TYP. A IP ARKINGEDCONT GARS I ♦ a � �;;- �� CRS PARKING&STAGING AREA > � _ � � � � � / / / / / / � / � / / / � � � � / / � U E. U z L CATION OF,s CY DUMPSTER y - W \,... IIv II i ♦ r % ° Ip �-. � O o / o r �r/ I PROPOSED SF WITH -,- Y WIRE BACKING SS / �,.- W W. / / / / / � W ROPO�D W . m ..- , '� CONSTRUCTION C H OCATIO OF PORTA POTTIES � Y � / � � � � � � � � LLJ m� AC SS SS LOCATION OF FUELING AREA.'. �. I / �,, � / NHS ul �_ H ROPOSE CONC. .THE FUELING TANK SHALL BE COMPLETEL URROUNDED BYA v. / \Lu WASH UTAR A °'z'DEEP, z'WIDE EARTHEN BERM WITH A HEAVY MIL I ` I I r/ 1 1 \ \ ` ` \ LIJ 344 34 —� POLYETHYLENE LINING, OR BE PLACED IN AN IMPERVIOUS y W y`� ""WWI 1 ` I I I I (/ Cy„ "`�iiivvv U 1 rY/\' 1` LL 366 / "SHALL CONTAIN FUEL IN THE EVENT OFA SPILL. CONTRACTOR W_WWW W \ \ r \ 3o'WI EPLANTE /R FOR STED BUFFER A ONG POLO ROUNDS R - \ \ MAXIMUM VOL ME OF ST ED FUEL. W W W W W W W W I I 1 \ \ \ \ \ \ O G \ WWWWWW l \\ Wyss 36 . SHALL ENSURE VOLUME CAPACITY IS zo%LARGER THAN THE /U \� WWWWWWWWWWWWW i MM ° 0 354 1S \ � s � � ✓ / I W W W W W W W W \ \ I I / 5 54 s I / 56 \ 3 _ �w _- WWWW.WW / ��� �\ '-3 I � W W W W W W 0CD \ s \ '3 /2 zzx o MIN. w/ WASH RACK & DOWN GRADIENT W 1 \ N ___ _ PRO O ED PAV D C�'`ON�STRUCTION ENTRA CE e � 1 7 ) h W W W W ^ -�`.I N _ •,�''— _ — _g.,. \ CE SEDIM ENT TRAPPING DEVICE TO TREAT FLASH W I RUNOFF FROM EHICU A W GRAPHIC SCAL F P 1 —----_-- — A �. % � _� V I 30 o a5 30 0 W — — — — �ysx iry PoiE� �J6 JOB NO. zz \\1IN FEET182150 POLO GROUD � ���7-�s 1 inch = 30 ft.\ � � _ 34�� k i \ — _ — \ (VARIABLE<-yIpRHO)AD ` '� �o \ \ SLOPES STEEPER THAN 3:1 SHALL BE PLANTED WITH A NATIVE SCALE i 44� 6// �_ \ \ \ \ \ \ \ SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST 1 "-3O' �c p CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE OR i ��JI �® LB. PER i,000 sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO SHEET NO. \ REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH 10 STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED 2:1, AS SHOWN. lw l ' PROPOSED S WITH SF\ \\\\ / WIRE BACKING 5F ♦ F MATCHLINE - SEE SHEE 12 3 PROPOSED 18 DIVERSION. �/ / _ ♦ \ / CONTRACTOR SLOPE IS D F S_ 4o ��♦ DRAINAG MAINTAINED.BERM SHALL BE / ; LIMITAPPR�D FM E YR - STABILIZED AS DFIRST STEP IN ISTURBANCE.�� � [F S ♦♦ DIVIDE, TYP. FLOOD PLAIN, TYP. _ _ 5 / /��\ �'/ S F V ��O h�Q ♦♦ / _ _- / 3 i PRESER�EEP � / / - - � I � / ♦ � Z, • SLOPES, TYP. 430 MANAGE EEP SLOPES TYP. O � ���.3 /LIMITS, TYP.I �� OPRO POSED' GREENWAY, TYP. Ca \ O LIMITS, TYP. � IP SCOTT/R. C�JC Lic. No. 032/4/22lll�`S'SIONAL Fl F- C Z F F w 2 f ° 0 F z O J Q z d U 00 C ZD Z o Ln Z J C O O ti H Z w CD L J Ce C WCe aLu a �,,,♦ in ° W e W LuC 5 O _4z8 N PROPOSED TREE.TP , � / _TS V / __ -__ •" / �� 0 � � � o N I' PROTECTION Al I O � w O I O I NNN 3 EDIM�EN7 BAsI B' , / p PROPOSED LIMITS OF M / _ N� DISTURBANCE, TYP. �... � IP � � DA=13.96 dC. � 1 � � �• S ,' ,� M P )POSED SF WITH CV WIRE BACKING S5 1 / DC IF V ..•„ V A / M SFWI H i , o_ \' / /� - 9- •t �5�� PROPOSED 1 / Z I WETLANDS TO REMAIN -`_ / - � � '� 9,/ WIRE ' (V UNDISTURBED, TYP. I ---_'� 3 I \ \ �. .. 3 - - DRAINA E �� / �� _� ', Q z -- - , IP DIVIDE, TYP. Q BACKING fit /� 0 Q 1 W 5 . a � 11 > O i J > z U ui DIVE SION,IPHASEIII Lu I �c NDA=i.83ac 1 �� / �� �" Q . y I406 LU w - - I x \ / J W z ul W l \ - , W \ - / W/ 1 / v O w JOPOS D18"DIVERSION. 1 - CONTRACTOR SHALL ENSURE _-- - PROPOSED LIMITS OF DI ''p \ - - 6% r "- -tP - \ 3 DISTURBANCE, z6.z5 ac. TOTAL. - wN POSITIVESLOPEIS MAINTAINED. BERM SHALL BE �, �3 • e .°. / �" �"�.. / Ld_ STABILIZED ASA FIRST STEP IN DISTURBANCE. • I i _ \'X 3o NATURAL BUFFER ALONG i Q i A / PROPERTY'S PERIMETER / Q O i w V GRAPHIC SCALE % Lu Lu bi s i 3o i5 30 ^� W 10 ' , to JOB NO. IN FEET182150 �� `-V A �� V 1 s . V � � I < 5 / � = � • 5� � � � � � SLOPES STEEPER THAN 3a SHALL BE PLANTED WITH A NATIVE SCALE SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST �� 1 V > 5� CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i = 3O' ' 1v / LB. PER hoop sf, UNLESS OTHERWISE SPECIFIED. THESE AREAS \v _ _, �� / �' ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO SHEET NO. } w j\ MA I LINE S E E ET 1O g REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH NSURE0 S 'ION' \ � � � � � / , � STD. & SPEC. 3.36. SLOPES SHALL NOT EXCEED aa, AS SHOWN. 11 N TE: OUTLET PROTECTIONSHALL BE INSTALLED * ESC PHASE III NOTE: / WHERE DIVERSIONS ENTER THE TEMPORARY SEDIMENT THE CONSTRUCTION OF LOTS 123-127& / -(`BASINS. ALL TEMPORARY OUTLET PROTECTIONS SHALL BE 'UNDERGROUND DETENTION SYSTEM'A' SHALL / / j / / / / F' 30 5 0 6. p�TH Or� D V BE DELAYED AS LONG AS POSSIBLE TO PROLONG _ / / j / ! / ® C' THE LIFE OF TEMPORARILY SEDIMENT BASIN'A'. / l / - 5F --- SF - 41 O z ~ \ _/ IN FEET) cSCOTT R. LINS� Lu / / / ` = / � / � / PROPOSED SWM FOREST & i C] � J 5 - - -- - / "OPEN SPACE EASEMENT - \J` 1 in 30 ft/ Lu / i ! / / / / / ,SSF T - L� Lic. No. 035791 a r PROPOSEDTREE 2/4/22 U I PROPOSE SWIM FOREST & OPEN / %, PROTECTION TP / � 414 _ j % �1p SPA EASEMENT AREA TO /. _ s Lu / REM IN UNDISTURBED,.TYP. �. %/. ��._ / / - sue! \ SIONAL E� Lu PROJECT LIMITS,'! V) PROP / T� /... / - SF P - � PROPOSED 18' DIVERSION.- - i _. - CONTRACTOR SHALL ENSURE \ i POSITIVE SLOPE IS MAINTAINED. BERM SHALL BE STABILIZED AS - / - /PRESERVED ' / STEEP ' i J. _.. STEP IN DISTURBANCE. _. -... /... g SLOPES,TYP. 1 OENWAYWIRE j.. _ GREPROPOSED SF WITH S . F - - A_ 44 VV `ts / 'D N N DIVERSION, PHASE III WIREBACKIN % SSF 4y2 i. V N ti N - _—SSF_bS ' SS S zic ��( �. . SF� ��� A z z DA-i.a'J� _ i F- p 0 - SF ■- \\ �__ w w S s \ 1 SSF�SSF --SSF %,,... \ ,,:' �� _ \ l �` -s s/ 3 . T p ZLu Z S /u m w u U oU r / / / 1 _ — - _°�° U L / qio �\Cc ,- W / / / .3 / � � Z Q d' --� J / o � a w � � 414 s Q J l ✓iY Tr 4 W d W W W / a• as � Lu u Lu W W W W LL ray Ln N Lu 12 C N RA T R S ALL LR AN• OLE N T W W W W I I IN LET BASES WITH SEGMENTAL RINGS. STRUCTURE RIMTOP ELEVATIONS SHALL BE FIELD FITTED DURING CONSTRUCTION / ' . • /' p y _ _� \� C TO MATCH THE INTERIM FILL GRADES, UNTIL THE FINAL / < `• ' . • . a -' - W " - / _ _ / I / GRADES ARE ACHIEVED, TYP. THIS PROCESS WILL PROLONG- E Ip THE LIFE OF SEDIMENT BASINW& WILL ALLOW FOR THE: W STORM SEWER RUNOFF TO DISCHARGE INTO THE '" / • ' P a . 3 N / y n I IN DlJ G pN TRUCTI N FORT EATMBNT UPLAND ST IN NST / it • I LOT h / I 125* W I r W N i III I I I [,y) Lu N 3 J W W : // \ 12!} ! „.. I _ i - PROPOSED TREE C'7 PROTECTION 0000, ss 'i I ■ li A _I � � � ��, LOT l , — — , � � � 44 " � _ � .� BM ♦ � WETLAND T REMA �' \ I • I PROPO ED \ I f p UNDISTURBED TYP. \ / •• S IP T BAFFLE \ t yj POSEDIAF ENCE, �� V A /� d-I / I I s 3 • � Q / QUICKSAND KEEP OUT' A S \ \ SB .A. / f // I / I I I - m • (� � J INSTALL SIGNS "WARNING � \ .. �\ � \ � N _ •.. 0Oj DIM N ASIN'A' — o \ -PRbPOS VIM - S OF G O DISTURIANCE, TYP. I \, c.\\ / \� I^ I I ------ ---- - �' SLOPES, TYP. I .-�.'a I �� _j MANAGED STEEP PRO ED30'WIDEV OTCIL AT V A f,�� �\ / I I TS �, IP �. • s �� RIPRAP LINED FILTEMERGEN' V \ /p �• 0 IO ui SPILLWAY W/ 4:1 SIDE SLOPES& p � ER FABRIC UNDERLAYMENT. Z24Z Nb LzL) SPILLWAY CREST ELEV.=31.67'. ) PSEDT M / TO OUTFALL THE UPLAND OR / �!• I I, • 3 / / — eLu SEWER INTO SEDIMENT BASIN'A' \x1' \ / r✓ .;.i • / _j H �J y y\\ s \ _ / •"° UNTIL THE BASIN IS CONVERTED & - ryV` �I I — — / . T TI THE UNDERGROUND DETENTION I /� SI �I � I �I I I I : / � •• • •. / Lu IN TAN � V/ —LIMITS, TYP. t cLUzU % U z W 1 ■ O o y � ICDCLU co s / I l h PROPOSED ~ 0 .4 / . �'. w I. \ ` 1 vi _ • / LIMITS OF PROPOSED SF WITH S I I / IP I IP / I . / DISTURBANCE, Lu .�i WIRE BACKING F 3 • / 26.25 ac. TOTAL. V / Lu W - W PROPOSE Lu Lu TREE PROTECTION // ySS � � � \� � 1 / � •.. I / � O Q i ` W h ERSION, PHAS III A \ \ l vy y \ // qzo O ti / / _ / A / ( p . w / S PROPOSED SF WITH O CV 3 -ten - WIRE BACKING ' �. ySS. Soon yS D AINAG DIVIDE, TYP. A- - ds 4 ��� so s \� / �� / / ' U s 100�1 SLOPE MIX WITH ANNUAL RY GRASS BY ERN D WITH A NATIVE � o / - Lu � 3. E W' dS �/ , P/ o w _ �. w / CONSERVATION SEEDS ATA RATE OF 6o LBS. PER ACRE, OR i \\ / 3 SE IMENT ASI ! \ JOB NO. LB. PER T,000sf,UNLESS OTHERWISE SPECIFIED. THESE AREAS N DA=13.96 dC. 18215� y, ARE HATCHED ON THIS SHEET WITH A'BM' SYMBOL AND ALSO REQUIRE BLANKET MATTING IN ACCORDANCE WITH THE VESCH / STD. &SPEC. 3.36. SLOPES SHALL NOT EXCEED za, AS SHOWN. / / SCALE /SSF— SF \ `YSs. FS iil IP 1 / / �! SHEET NO. MATCHLINE - SEE SHEET 11_ ssF - SF l►if I , SEDIMENT BASIN 'A' DETAIL, SCALE I"=30' e' VW PROPOSED 030" OUTFALL SYSTEM. SEE SHEET 16 FOR DESIGN INFORMATION w 1 PERTAINING TO STRUCTURES A4, AS, A7, \T A9, Aio & An. STRUCTURES A4, AS, A7, AS, Aio & Aii SHALL BE UTILIZED DURING THE ESC PHASES. 1 R. 2 LIMITS OF FEMA APPROVED2oo YR //����� FLOODPLAIN,TYP. �IAAII PROPOSED RIPRAP LINED OUTLET PROTECTION. SEE SHEET 16B FOR ANTI -SEEP COLLAR SATURATED ZONE \ DESIGN INFORMATION. / Uj W 1-1 W Source: Va. DSWC Plate 3.144 STRw W I 1{ J W kn Lu I / s H N L II I H I / X S ING TREELINE. TREES & VEGETATION IN THE VICINITY OF SEDIMENT / BASIN 'A' SHALL BE CLEARED. DURING THE EARLY STAGES OF ESC PHASE STR. A6 / I, CLEARING & GRADING ACTIVITIES SHALL BE LIMITED TO THOSE NECESSARY FOR THE INSTALLATION OF THE ESC PHASE I MEASURES. TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY EMBEDDED 6" INTO AN 18" THICK REINFORCED y 1 CONCRETE FOUNDATION THAT IS 1o'x1o', AND BURIED BELOW GROUND. CONTRACTOR SHALL INSTALL THE SWM FACILITY 06o" LL/ RISER & CONCRETE FOUNDATION (STR. A8, RIM=370.67') AND SHALL UTILIZE THIS DURING CONSTRUCTION. � 1 I CONTRACTOR SHALL ALSO INSTALL THE LARGER/UPPER 030" OUTFALL PIPES (STR. A1, A2, Al A4, A5, AS, & A7) AND S ) II •?• \ USE THESE DURING CONSTRUCTION. CONTRACTOR SHALL TEMPORARILY BLOCK THE SMALLER/LOWER OPENINGS ) I I \ FOR STR. Ag & THE STUB PIPE DURING CONSTRUCTION. "' ) T AS /PROPO ED \ THE CONSTRUCTION OF THE LEVEL SPREADER, THESTUB DO \ R BAFFLE PIPE AND STR. Ag SHALL BE DELAYED UNTIL THE j SEDI MENT BASIN IS CONVERTED TO A PERMANENT SWM POSED AF ENCE, \ m FACILITY. CONTRACTOR SHALL WORK CLOSELY WITH THE /INSTALL SIGNS "WARNING A ESC INSPECTOR REGARDING THE TIMING OF WHEN THE QUICK SAND, KEEP OUT" LEVEL SPREADER, STUB PIPE & STR. A9 ARE ACTIVATED. PROPOS£D2o'WID FOP I OF D ELEV. 373 0q' \ J, 1 \ � PROPOSED 30' WIDE V 1 CL. AY F S F IRIPRAP LINED EMERGENCY ( \ - SPILLWAYw/ 4:1 SIDE SLOPES& n I FILTER FABRIC UNDERLAYMENT. \ `\ SPILLWAY CREST ELEV.=31.67'. y 1992 GRAVEL CURB INLET SEDIMENT FIL TER GRAVEL FILTER RUNOFF WATER �a a ✓ Z* TW7111 _) it - rr ►_ uu � .IIIII IIIII - �,JIIII IIIII - IIIIII SEDIMENT CONCRETE GUTTER 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 INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT p3, #357 OR 5 COARSE AGGREGATE. Source: Va. DSWC 3.07 1992 Plate 3.07-6 ANTI -SEEP COLLAR REQUIREMENTS: i. THE SEDIMENT BASINWOUTFALL PIPE BELOWTHE RISER REQUIRES THREE 4.31x4.3'W COLLARS. 2. THE SEDIMENT BASIN'B'OUTFALL PIPE BELOWTHE RISER REQUIRES TWO 5.31x5.3'W COLLARS. 3. THE MAXIMUM SPACING OFTHE COLLARS SHALL BE 14 TIMES THE PROJECTION OF THE COLLARS ABOVE THE BARREL. 4. COLLARS SHALL NOT BE LOCATED CLOSER THAN 2' TO A PIPE JOINT. S. COLLARS SHALL BE SUFFICIENTLY FAR APART TO ALLOW SPACE FOR HAULING AND COMPACTING EQUIPMENT. 6. 95%COMPACTION SHALL BE ACHIEVED IN THE AREAS SURROUNDING THE COLLARS. 7. CONNECTIONS BETWEEN THE COLLARDS AND THE BARREL SHALL BE WATERTIGHT. Sediment Basin Design A drainage area (acres) 8.59 DESIGN HIGH WATER basin volumes: (using 2' contour intervals) (25-YR. STORM EUN.) elevation (ft) contour area (so volume(cy) MIN 1.0' 364.00 2992.0 0 DRY STORAGE 366.00 4129.0 263 368.00 5447.0 616 �S"`E 370.00 6962.0 1075 372.W 8693.0 1653 _ IEpWET MENT CSTORAGE REDUCED TO Ss C.Y./ ACRE) 373.00 10090.0 2001 wet storage MIN. 1' WI SPILLWAY CREST OF EMERGENCY �� W�T. 'SPILLWAY RISER CREST ONG EEMCE� wet storage required (cy) (67*DA) 576 design high water 371.67 dewatering orifice elevation (ft) 367.77 top of dam (ft) 373.00 wet storage provided at this elevation (cy) 576 top width of dam (fl) 10.0 available volume before cleanout (cy) (34*DA) 292 bottom of basin (ft) 364.0 cleanout elevation (ft) 366.14 approx. bottom dimensions: 44'x118' distance from cleanout to orifice (ft) (> 1') 1.6 upstream face slope: 2:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67*DA) 576 baffles: YES principle spillway crest (ft) 370.67 length of flow, L (ft) 78 dry storage provided at this elevation (cy) 693 effective width, We (ft) 96 diameter of dewatering orifice (in) 6.0 L / We (baffles required if < 2) 0.8 diameter of flexible tubing (in) (orifice+T) 8.0 collars: YES runoff. depth of water at spillway crest (ft) 6.67 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z 1) 2 tc (min) 8 slope of barrel (Sb) 7.72% 1 2yr 4.5 Q 2yr 17.4 length of barrel in saturated zone (Ls) 40.14 125yr 6.5 Q 25yr 27.6 number collars required 3 dimension of collars 4.3'x4.3' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (n) 60 required capacity (Q25-Qp) (cfs) 0.0 spillway capacity, Qp (cfs) 48.0 bottom width (ft) 30 diameter trash rack (n) 90 slope of exist channel (ft/ft) 33% barrel length (ft) 60.4 minimun length of exit channel (ft) 25 head on barrel through embankment (ft) 11.8 crest of spillway (ft) 371.67 diameter of barrel (in) 30 NOTE: THE RISER FOR SEDIMENT BASIN W SHALL INCLUDE A 06" DEWATERING ORIFICE WITH AN INVERT ELEVATION OF 367.7j. THE DEWATERING ORIFICE SHALL BE PERMANENTLY PLUGGED WATERTIGHT AT THE TIME OFTHE BASIN's CONVERSION TO A SWM FACILITY. ALTERNATIVELY, THE CONTRACTOR MAY ELECTTO REMOVE THE UPPER RINGS OFTHE RISER HOUSING THE DEWATERING ORIFICE & INSTALL NEW RINGS MEETING THE SPECIFICATIONS OFTHE PERMANENTSWM FACILITY's RISER. SEDIMENT BASIN 'B' DETAIL, SCALE I"=30' 3.01 2 III � I . • • • • • • • • • • w • . • • • • T4•.b4•••.•.••44•• ••.bb4•db44•d� •.•.•.•.•.•.•.•.•.•.•. ,66050 r .• 1•.•.•.•.•.•.•.h•.•.•.2•.•r. • • • • I • • • . • • • • •••••.••••M•db44� v.•.•a �.•.•.•.•.•.•.•.•.•.•.� �.•.•.•� �.•.•.•.•.•.•.•.•.•.•.� • • • a" '. f Source: Adapted from Conwed Plastics and Plate 3.01-1 VDOT Road and Bridge Standards Sediment Basin Design B drainage area (acres) 14.00 basin volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) 352.00 3,816 0 354.00 5,127 330 356.00 6,609 764 358.00 8,268 1,313 360.00 10,105 1,993 362.00 12,089 2,814 364.00 14,178 3,786 wet storage: wet storage required (cy) (67*DA) 938 dewatering orifice elevation (ft) 357.00 wet storage provided at this elevation (cy) 1039 available volume before cleanout (cy) (34*13A) 476 cleanout elevation (ft) 355.1 distance from cleanout to orifice (ft) (> 1') 1.9 dry storage: dry storage required (cy) (67*DA) 938 principle spillway crest (ft) 361.33 dry storage provided at this elevation (cy) 1200 diameter of dewatering orifice (in) 6.0 diameter of flexible tubing (in) (orifice+2") 8.0 runoff: C (use 0.45 for bare earth) 0.45 tc (min) 8 12yr 4.5 Q2yr 28.4 1 25yr 6.5 Q 25yr 45.0 principle spillway: available head (ft) 1.00 diameter riser (in) 60 spillway capacity, Qp (cfs) 48.0 diameter trash rack (in) 90 barrel length (ft) 136 head on barrel through embankment (ft) 15.8 MIN.1'WISPILLWAY CREST OF EMERGENCY Y' WITXOUT�SPILLWAY HIGH WATER STORM ELtvJ - SEDIMEM CIFAN FONT (•To-uSTO/AGEpREWCEO If VPROPOSED PERMANENT SWM FACILITY STRUCTURESBel, BB2, I(1 Il BB4, BBS & THE RISER BB6 SHALL BE PROPOSED SAFETY FENCE SERVE NSTALLLED TE MP. SEDIMENT BASIN'B'& SHALL E THE BASIN. I II �' ` INSTALQUICK SIGNSK EP NIN( N Sir OSED BAFI SSF \ \ -F \ 1 \ \ PROPOSED RIPRAP LINED OUTLET , SSF SSST 'BE2 / II PROTECTION. SEE SHEET 17 FOR 55 1 1 DESIGN INFORMATION. SF i / I 37•fi R. BB4 I \ SSF / \ \ �'SS / R• @" 51'- �Si 1 PROPOSED 56WIDE VDOT CL. Al RIPRAP LINE y� _ STR.1 B6 355 EMERGENCY SPILLWAY W/ 4:1 SIDE SLOPES & FILTER FABRIC UNDERLAYMENT. SPILLWAY CREST ELEV.-362.33') 55 \ 3 i V LIMITS OF FEMA\APPJ p 3 \ V FLOODVED 10o YR FIIOODPLAIN,_TYP. CONTRACTOR SHALL INSTALL STR. BB6 (06o RCP SWM RISER WITH A RIM ELEV=361.33) & ITS FOUNDATION. 1 / CONTRACTOR SHALL SEAL THE PERMANENT SWM LOW FLOW ORIFICE WATERTIGHT DURING CONSTRUCTION. ((\M,) I • AT THE TIME OF THE SEDIMENT BASINS CONVERSION, THE PERMANENT LOW FLOW ORIFICE SHALL BE LL ACTIVATED & THE SEDIMENT BASIN s TEMPORARY DEWATERING ORIFICE SHALL BE COVERED WITH A METAL I^ PLATE. SEE SHEET 19B FOR DETAILS. ALTERNATIVELY, STR. BB6 MAY BE INSTALLED WITH SEGMENTAL RINGS N AND THE UPPER PORTION OF THE MH MAY BE REMOVED & REBUILT IN ACCORDANCE WITH THE SWM PLANS AT THE TIME OF THE _TEMPORARY B IN's CONVERSION TO A PERMANENT FACILITY., I LL \ PROPOSEDSF WITH S / WIRE BACKINCy - EXISTING TREELINE. TREES & VEGETATION IN THE VICINITY OF SEDIMENT BASIN W SHALL BE CLEARED. DURING THE EARLY STAGES OF ESCi PHASE I, CLEARING & GRADING ACTIVITIES SHALL --- BE LIMITED TO THOSE NECESSARY FOR THE �\ INSTALLATION OF THE ESC PHASE I MEASURES. RCSv� /Oo TO PREVENTTTFLOTATION THE RISER BSE SHALL BE� \ FIRMLY EMBEDDED 6 INTO AN 36 THICK REINFORCED CONCRETE FOUNDATION THAT IS 10 x2o, AS SHOWN. -- S � / CONTRACTORS ALL INSTALLA / - -� S o R/W DIVERSION ACROSS TH D _ s S \ S ^� I CONSTRUCTION ENTRANCE 5 P EXISTING j2"CMP CULVERTes / J O.S' design high water 362.33 top of dam (ft) 364.00 top Width of dam (ft) 10.0 bottom of basin (ft) 352.0 approx bottom dimensions: 51'x72' upstream face slope: 2:1 downstream face slope: 3:1 baffles: YES length of flow, L (ft) 53 effective width, We (ft) 215 L / We (baffles required if < 2) 0.2 collars: YES depth of water at spillway crest (ft) 9.33 slope of upstream face (Z: 1) 2 slope of barrel (Sb) 2.4% length of barrel in saturated zone (Ls) 61.87 number of permanent collars required 2 dimension of collars 6.TA. 1' emergency spillway: YES required capacity (Q254p) (cfs) 0.0 bottom width (ft) 50 slope of exist channel (ft(ft) 33% minimun length of exit channel (ft) 7 crest of spillway (ft) 362.33 � POSED CONTRACTOR` PARKING & STAGING AREA / PROPOSED /CONSTRUCTION _ / ACCESS rr OGEE �2 c Z H w f O u F U Z Or e M Z Ul a O C U Z W C, D En J e J O O Q w C F m u LU z Q i w `u a � o W c ro D W UU` II u 'D ^ CD N .1 L ti Z � N _ C10 I z f] W0') N N J W LJJ J ZJ � J Cl) O,..,� ® LULL L9 � o� z�z O � U U T� Z � LU C)U I Q W Y o w LU LU W 0.6 Ul(n J O ZLU 13� Of ® LU I". O LU CID J< 0 N 0 U w J ti F- 0 w Ln JOB NO. 182150 SCALE AS SHOWN SHEET NO. 13 LIMITS OF EMAAPR OVER\ o YR FLObDP\ LAIN\R. 1 j 1\U� 1 / v �= / II _ I r/i4 3 q�' 75%/i�/ � /j/l \ \\\�� �\ \ �. ��` \�-\� \\\\ \ \,,--.- ®, oo / �J,po/ /ice %/j %�i j'% ♦M // / / / \\�\\�/ ��(� 7/ — �\ \�) � � /�� �` — — j`� � � \\ \ Y Y Y Y ■ ■ ♦ ! SUBAREA A % \ r \ ���v A ���1� A \ //r ■ ♦ ♦ / - POINT OF ANALYSIS' A' \ F': ♦YYYYY i // — CN=55 / ♦ /� / i — i j ) I I / i \ _ \ \ \ \ \ \ ® / / / // /� / ♦ / / \ / /J / / \� — _ (AT CONCENTRATED OUTFACE) — \� _ Tc.16SixS.' 100' OF OVERLAND FLOW w/ A ELEV.=7' WETLANDS TO REMAIN 650' OF CONC. FLOW w/ 4 ELEV.=90' Y Y Y Y ♦ • ��� a�f' �_ --AREA OF APPROVED UNDISTURBED, TYP. o'YIJ4 I I // 1 I % rl /� �/ / ♦ Y �. 1 2 SECTION 1 MASS GRADING A\\�� / /� I I I 1 I �� �� �) /� / / / / ♦ / `� ��� ��� �� \� 1111 � � /� ll,l / l�l � o t I � III / �� � � � ♦ ��/♦ i ♦♦ • / _%;— �\ (WPO 201700037 AMENDMENT #2) LOCATION OF PROPOSED DRY DETENTION I ! I I I II I ! I����//�/�/�� I /-� ♦♦ ♦��� ♦♦�♦♦ 1 • / /� \ BASIN'A' & UGD SYSTEM 'A' I ♦ _ \ • ��o■■■ ■� STREAM LIMITS, TYP. ♦ I �/� �_ �� AREA PROPOSED � I ♦ / v _ 05 _ .:.. TO BE DEVELOPED \ I ( �— — — �� / v \v�/l��l—� ��� v � .� �����°� / /� A ��UREBLOC1C18TOBE ��—_� --�/%■ �� �� A -- / \ / ///�/ �� ° �� ■ �� �� / AREA OF FU ` PROPOSED �` �� 1 ����•' / ROUTED TO PROPOSED BLOCK$'"1�&mil— �� j GREENWAY, —aa I III I \ TYP. *'Romeo / rfl 00 �� ��� �� / i� _ �������� ♦2``Y� l / A\� ° / / ! �/ \ _ // — 1♦ Qom! f PROJECT LIMITS TYP. ♦ ♦ ♦ ��� A ��� / /� //�/ All o I sWill m_W v�_�/ /� / 0 —100' OF OVERLAND FLOW w/ 4 ELEV. 4' �/� 1,150' OF CONC. FLOW w/ A ELEV.=80' �� o � �M��� 10 I �/ SUBAREA B APPROVED �l0 12.16ac.— / O o ■ / CN=55 I POND #4 ( a A I Tc=0.24 hrs.00 : II / 446 / /p — 1 ,co 448 \\ \\1 �� / // —�/ I ■ I I I / / 1 l \. �/ / // �� %/�/�//�(�1 _vim/ .//— — _ — \ \ i 1 I 1 - `jam `lam? \ F' U ■ / / //i/ / \ / 6 2PP `Pj��os^ / I 1 I-:.I�:'�e.. O \ ■ '-.../ / / \ \ \ \ �y v vvv` 1 ■ — 00 POINT OF ANALYSIS 'B' o ' (AT CONCENTRATEDOUTFALL) 0005 03 o v 1 0 \ O \ S Y \ _— POINT O IS' —� (RIPRAP�LINED STR€AMBEDBELOW / PROPOSED-CONCENTRATEDOUTFALL) / CONCENTRATED OUTFALL II � I ■ � �' 30' NATURAL BUFFER ALONG J/ PROPERTY'S PERIMETER 1 �I / / \ �—MONTGOMERY RIDGE SUBDIVISION � i / � ij� /ice � � � ✓ A / /i —WATERSHED SUMMARY FOR SUBAREA A CN Area, 1-year Flow, 2-year Flow, 10-year Flow, ac. cfs cfs cfs DAA (Pre-Dev.) 55 6.37 0.82 2.14 9.48 000Y ZO // ///////� WATERSHED SUMMARY FOR SUBAREA B / /��� CN Area, 1-year Flow, 2-year Flow, 10-year Flow, ac. cfs cfs cfs DAB Pre-Dev. 55 12.16 1.30 3.34 15.17 LOCATION OF PROPOSED DRY ■ DETENTION BASIN 'B' & �!�/ `` WATERSHED SUMMARY FOR SUBAREA C ERGRO ND DETENTION SYSTEM'B' i )I CN Area, 1-year Flow, 2-Year Flow, 10-year Flow, �,��. ac. cfs cfs cfs (Pre-Dev.) 72 1.87 2.02 3.03 6.69 / O ■ / / ' I I I I III 4`\1 \ \ \\ T �\ \ SUMMARY OF CHANNEL PROTECTION COMPLIANCE / 100' OF OVERLAND FLOW w/ A ELEV. =9', 1 \\ � \ \ � � Pre-Dev. Subarea Post-Dev. Subarea Method of 9VAC25 870 66 Method of 9VAC25 870 66 75' OF CONC. FLOW w/ o ELEV.=15' & I I \ \��\ — (Point of Analysis) (Point of Analysis) Channel Protection Compliance Limits of Analysis for Channel Protection 425OF CHANNEL FLOW A A Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) B B Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) C C Section B.1.a (2-yr Peak Flow is nonerosive in Pipes and Manmade Riprap) Section B.4.a (Subarea < 1% of Overall Watershed) SUMMARY OF FLOOD PROTECTION COMPLIANCE Lz Pre-Dev. Subarea Post-Dev. Subarea Method of 9VAC25-870-66 Method of 9VAC25-870-66 NEL�\��\\\�� (Point of Analysis) (Point of Analysis) Flood Protection Compliance Limits of Analysis for Flood Protection �.�\ \ t � l SUBAREA ac., N=72, Tc=0.13 hrs. — ® \ �'— \ _ ✓/ A A Section C.2.a (10-yr Peak Flow is Confined within pipes and SWfacility) Section C.3.c (Outfalls to mapped Floodplain) B B Section C.2.a (10-yr Peak Flow is Confined within pipes and SWfacility) Section C.3.c (Outfalls to mapped Floodplain) C C Section C.2.a (10-yr Peak Flow is Confined within pipes) Section C.3.c (Outfalls to mapped Floodplain) rA SCOTT/R. CD,LLINS'Z Lic. No. 035791 Pow 2/4/22 `S'InrTAT. I�I � 1 F O i z aW �U U)z O z O W z F a k =) OU 02 O i U } i Z W 0 =) N J W Z O0JWUQ z W W a H a m W Q L W w a 0 W N N W N LR N r-I Ul z J J U ti CM Ch O N M N O Cy) N N W J J U) LU 2 U LU U) w LU LLI O O N z Q a z w w > Q Q ,06 LU W Q V � O J V) m � z W LU o O W m w Q� IZ JOB NO. 182150 SCALE n r 1 =100 SHEET NO. 14 r \ LIMITS _ OFfEMPC �AAPPVED STORMWATER MANAGEMENT NARRATIVE: \ \ �' -� FLObDPLAIIN, TYP.\ OVERVIEW \ \ .` e \ '... �� l -' .;:; `� \ -'a`�` s/ �/�/// j � �.. ...- �^ - `ice ,-� ra j \� \ \ \ � \\: Z THIS PROJECT IS PART OF THE BROOKHILL DEVELOPMENT, AND STORMWATER TREATMENT IS PROVIDED TO�MITIGATE THE IMPACTS FROM THE PROPOSED IMPROVEMENTS. THE STORMWATER MANAGEMENT PLANFUTURE SWM FACILITY(IL10c' COMPLIES WITH PART IIB SWM REQUIREMENTS.CWATER QUALITY SUMMARY \� \ \ - \ / _ _ ..... .. _ s .• ,. %= �\ \_ / L, •z' t `� TSH THIS DEVELOPMENT REQUIRES THE REMOVAL OF 17.72 Ibs/yr OF PHOSPHOROUS. THIS PHOSPHOROUS \��' \\ _ �� !- \ I / No. 035791,1, REMOVAL RATE IS MET THROUGH THREE BEST MANAGEMENT PRACTICES. A DOWNSTREAM LEVEL SPREADER \ �\, �� ' '�'�'� � � �- DISCHARGING TO A SWM CONSERVED OPEN SPACE EASEMENT WITH A/B SOILS IS PROPOSED. THIS BMP IS / / i 'z:'" - - " - -"�� / //� / •' ' / `9 2/4/22 DOWNSTREAM FROM THE BULK OF THE PROPOSED BLOCK 16 DEVELOPMENT AND PROVIDES A\\ �- „ PHOSPHOROUS REMOVAL RATE OF 6.89 Ibs/yr. A SECOND BEST MANAGEMENT PRACTICE OF PRESERVING �\� �� _ _ _ / �- // /;� / �',� / / SIONAL EEO OPEN SPACES WILL BE IMPLEMENTED. A RECORDED SWM FOREST & OPEN SPACE EASEMENT WILL BE PROVIDED PROTECTING THESE AREAS PRIOR TO THE ISSUANCE OF A LAND DISTURBANCE PERMIT FOR THIS \�\\ �\ r .•?. / \ -' so/ - •„ i - ��! _: _ l / PROJECT. AFTER THE IMPLEMENTATION OF THESE TWO BMPs, THE THIRD BEST MANAGEMENT PRACTICE OF ��\�_, _��/�� PURCHASING NUTRIENT CREDITS WILL BE IMPLEMENTED. A PHOSPHOROUS REMOVAL RATE OF 10.83 Ibs/yr �� �� •. \ \ \ r - - ,i $�",9� ;. \ / SUBAREA A REMAINS FOR THE PROPOSED PLAN's WATER QUALITY COMPLIANCE. PLEASE NOTE HOWEVER, THE OVERALL �, ` ',. , `"' �/ - -- "" _,. - Q C ` \ / (FINAL \ z BROOKHILL DEVELOPMENT CURRENTLY HAS A SURPLUS OF PHOSPHOROUS REMOVAL CREDIT THAT CAN BE ' ' t_- �\ APPLIED TO THIS PROJECT, LOWERING THE REQUIRED PHOSPHOROUS REMOVAL RATE TO 6.02 Ibs/yr. WITH ��c \� '�_ �\ ` �� � � � �, „�,;, - BUILDOUT) I /� it � � `� C A NUTRIENT CREDIT PURCHASE OF 6.02 Ibs/yr, THE OVERALL BROOKHILL DEVELOPMENT WILL MEET THE \� _ _ ;,`� \\ <r:� _ . _ °"� _ _ + "r 7.75 ac. MINIMUM REQUIRED REMOVAL RATES. PLEASE ALSO NOTE, THE LEVEL SPREADER DISCHARGING TO A - - Q \�\. CN=83 I / i N `c CONSERVATION AREA EASEMENT WAS DESIGNED FOR THIS PLAN AND THE FINAL BUILDOUT, WHICH Tc= 12 hrs. 'I rl - ' \`��� >+ g/ N INCLUDES ADDITIONAL AREAS UPLAND OF BLOCKS 16 & 17 WHICH WILL LIKELY DISCHARGE TO THIS BMP. \ \ _ ---- POINT OF ANALYSIS'A' \ :\.: -- \-, �:.. _•_ _ - 0. S J vl -- / N ti a PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS. \ --- ___ (AT CONCENTRATED OUTFALL) \:r,}. , '' \ i - +"" / \ / iL """"- 'I \ -r�s ^ Z ~ 00 WATER QUANTITY SUMMARYs. ... ,w \ ._ - / `s` - -� _1 / •i `� * / Z F O O c THE PROPOSED DEVELOPMENT CREATES TWO (2) CONCENTRATED OUTFALLS AND DISCHARGES INTO AN - \\' \\ �\ \ \ \ ® ' ' ' - MARCELLA SUBAREA A G' i� - . -� / /� Q z z a ... .,. EXISTING THIRD CONCENTRATED OUTFACE. \- - \ \ \ �� \ \ \\ \ \ \\\\ 1 J 1 , _ 1 ` i o STREET _ CN-82 j _ - (A \ THE TWO PROPOSED CONCENTRATED OUTFALLS FOR SUBAREAS A & B DISCHARGE TO THE POINTS OF - TC-0.12 hrs. \ - _ -, w Z ANALYSIS A & B, RESPECTFULLY. CHANNEL PROTECTION IS MET FOR THESE TWO SUBAREAS VIA 9 VAC ' �• \ ` r QO - , - Z / 25 870 66, SUBSECTION B.3.a (ENERGY BALANCE). THE LIMITS OF ANALYSES FOR SUBAREAS A & B / j \ l/� .. J - j [_ I 66 a _ ,a �s _ 1 _ a Z 2 g � x TERMINATE AT THE OUTFALLS SINCE SUBSECTION B.3.a IS SATISFIED. FLOOD PROTECTION FOR THESE TWO / WETLANDS TO REMAIN �,, _•: I • __ - r : T ' a ! ` O OU OO -- SUBAREAS IS MET VIA 9 VAC 25-870-66, SUBSECTION C.2.a (CONFINES THE 10-yr PEAK FLOW WITHIN THE UNDISTURBED, TYP. O ... �(� �� II: -�. A PORTION OF �' \ �> U m w U U s FUTURE BLOCK - - - YY + DETENTION FACILITIES). THE LIMITS OF ANALYSES FOR THE FLOOD PROTECTION END AT THEIR OUTFACES, . a _ y , _ r i 1 r.. „� Z w co Lu z SINCE THEY DISCHARGE INTO A MAPPED FLOODPLAIN (SUBSECTION C.3.c). PLEASE NOTE, THE BULK OF THE I OO,�. - - '�I - - �� , O u) Q Z Z = - 18 WILL BE z O > PROPOSED DEVELOPMENT IS CAPTURED IN SUBAREAS A & B AND ITS RUNOFF IS ATTENUATED. ALSO, THE / I + i DRY BASIN 'A', UNDERGROUND DETENTION SYSTEM 'A', DRY BASIN WAND UNDERGROUND DETENTION / LOCATION OF PROPOSED DRY DETENTION o� - - ._ ii�c \� „� O Q w U O O f F ROUTED TO - O SYSTEM W TREATING SUBAREAS A & B WERE DESIGNED FOR THIS PLAN AS WELL AS THE FINAL BUILDOUT, \ - _ Co w U U / / BASIN 'A' & UGD SYSTEM 'A' o BLOCK 16 & 17 3 WHICH INCLUDES ADDITIONAL AREAS UPLAND OF BLOCKS 16 & 17 WHICH WILL LIKELY DISCHARGE TO \ / / _� -fir. w Q c THESE BMPs. j o /s i r a - =? i� �'�1 If f-�'J� \�/ a w W X THE THIRD CONCENTRATED OUTFALL DISCHARGES INTO A MANMADE STORM SEWER SYSTEM ASSOCIATED w Q m c WITH POLO GROUNDS ROAD. THIS SYSTEM RELEASES ITS RUNOFF DIRECTLY INTO THE RIP RAP LINED /, / J : A _- i - -� > ' II r {- _ �� . M Q S STREAM LIMITS TYP. OUTLET PROTECTION IN THE STREAM's BED ASSOCIATED WITH THE 60"x60" DOUBLE CULVERT. THE _ _ / ! � ' - ' j 3' - _ _ -..I -, _ _ s w LU LU a PROPOSED & EXISTING STORM SEWER NETWORK's HYDRAULIC GRADE LINE CALCULATIONS WERE ANALYZED _ -� / / d° ' -' -' r;' _ '� + �V a a WITH THIS PLAN FOR ADEQUACY. CHANNEL PROTECTION IS MET FOR THIS THIRD CONCENTRATED OUTFALL �� A / / 00 l ' F (O � - - ( - _ -� -� �I A U) w O c _ (CONVEYING PROPOSED SUBAREA C) VIA 9 VAC 25-870-66, SUBSECTION B.1.a (2-YR PEAK FLOW IS NOT �_ �� / � � _ , : " ' - I �� - ! i : I �J J _ v ' A \ ). 50' OF OVERLAND FLOW i - - - - . ' , fa. - w > j EROSIVE IN MANMADE PIPES AND RIPF.AP THE LIMITS OF ANALYSIS FOR THE CHANNEL PROTECTION o �i R _ TERMINATES AT THE STREAM's RIPRAP LINED BED IMMEDIATELY DOWNSTREAM FROM THE 60"x60" CULVERT / / ��, i----. �`' ',, w A ELEV.-2' & �. d - -� - A W L w C .� _ /- / SINCE THE CULVERT's DRAINAGE AREA IS 100 TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA --_ �� -__ / � �' / PROPOSED � `�, � �- � ;' � 690' OF CHANNEL FLOW � OF SUBAREA C. THIS SUBSECTION IS BA.a. FLOOD PROTECTION IS MET FOR SUBAREA C VIA 9 VAC �� v / GREENWAY, - CO) 25-870-66, SUBSECTION C.2.a (CONFINES THE 10-yr PEAK FLOW WITHIN THE MANMADE CHANNELS). THE V / TYP. FLOOD PROTECTION ANALYSIS TERMINATES AT THE STORM SEWER OUTFACE SINCE THE EXISTING STORM SEWER DISCHARGES INTO A MAPPED FLOODPLAIN. THIS SUBSECTION IS C.3.c. PLEASE SEE THE ATTACHED 00 ,i / STORMWATER MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS. �,� A � � � � QO � Oo � ��-'_ ��,... , � --- �. •�_. `,", � _ �� s � � r V` �. o r WHERE PROPOSED IMPROVEMENTS &LAND COVER CHANGES OCCUR OUTSIDE OF SUBAREAS A, B & C, FOR � ,- � � , � i � � . ----- � � �:`. ' � � � _ - ',+� - „��j \ � / EXAMPLE THE REAR PORTIONS OF THE SINGLE FAMILY DETACHED LOTS ALONG MARCELLA ST., MARCELLA / \� �� ! >, �/ '✓ J��� a _ -' _ '� .'' i� / // 1 �,� w N •• iy ni ni CT. SABLEWOOD TRAIL & LACONIA LANE THE PERVIOUS &DISCONNECTED IMPERVIOUS AREAS SHALL BE •. k C \ \ Oo Oo N CD \i RELEASED IN A SHEET FLOW MANNER THAT IS NOT CONCENTRATED OR DETAINED. HOUSES ON THESE LOTS � \ � / oO \ 00 �J- / __2 , `i -� % � j ,:` - ' _ ., , !� �" / _ // / � � _ _ f / -u ��� 0 � � � o SHALL HAVE SPLASH BLOCKS AT THE OUTLETS OF THEIR DOWNSPOUTS TO PREVENT EROSION, \\ �o / ,/_ \ �� // .e. J n 'a c SEDIMENTATION OR FLOODING OF DOWN GRADIENT PROPERTIES. THE DOWNSPOUT OUTLETS & SPLASH t / PROJECT LIMITS, TYP. 00 - - Q _ // _ c BLOCKS SHALL BE INSTALLED UPLAND OF THE STEEPER TIE-IN GRADES, CLOSER TO THE HOUSES. ALSO, ) 1, � THE STEEPER TIE-IN GRADES SHALL BE STABILIZED PRIOR TO THE INSTALLATION OF THE DOWNSPOUTS AND SPLASH BLOCKS. SEE SHEET 19B FOR A DETAIL OF THE SPLASH BLOCK, OR EQUIVALENT. / '� oLy ��\\ WHERE PROPOSED SINGLE FAMILY ATTACHED LOTS ARE PROPOSED, FOR EXAMPLE THE LOTS LOCATED / \�'' -� I �° ® �., / J - -3 l s'- \* ALONG LACONIA LANE, THESE HOMES' DOWNSPOUTS SHALL OUTFALL INTO THE PROPOSED ROOF AND YARD �// �° ®'� '-" �� �. _/ \ C DRAIN SYSTEMS & WILL ULTIMATELY BE ATTENUATED IN A PROPOSED SWM FACILITY. SEE THIS SHEET FOR -� A DEPICTION OF THE ROOF AND YARD DRAINS SURROUNDING THE SINGLE FAMILY ATTACHED LOTS, AND V �- Oo o ,y . \, s THE FINAL SITE PLAN FOR THE CONSTRUCTION OF THESE STRUCTURES.\� oO ' s : - '- / /' _� A L J- -r7 --+-�� y ' r � r '7 00 AREA B 12.16 ac. SUBAREA B --- / C'7 s 0N=82 � FINAL �� cli ° �/ i A o / Tc-0.17 hrs. �' BUILDOUT - - a�� (� z C 0 o 20.08 ac. _ -, ✓ g T�P�o - CN=83 a' - _ S APPROVED �- .! ...% /; Tc=0.17 hrs. j��� �� POND #4 446 w / �� W 448 - OVERLAND FLOW w A ELEV.=T, ��� OO 215 OF :ONC. FLOW w/ A ELEV.=9' & �X�\ �o o�„". 1 - A. -550' OF CHANNEL FLOW00 A - W L.L c \ LU Post -Development Impervious Area Summary Q 30PROPERTY' gPERIM PERIMETER V A Subarea A P P Y 3 jNATURAL \ 0 A Blocks 16 & 17- Proposed Roads & Sidewalks 69,175 sf Q I A I / A Blocks 16 & 17-Buildings, Walkways &Patios Decks 73,470 sf z \ Blocks 16 & 17- Driveways 17,725 sf U \ - z \ \ Block 18- Future Roads & Sidewalks 15,975 sf i a y U O C // j \ / \ i / �� ( /// / \ Block 18- Future Buildings Patios / Decks 20,775 sf \ i \ F ✓ / / Block 18- Future Driveways 5,650 sf v ; 'MONTGOMERY RIDGE �� �O�/ // ��% 202,770 sf LJJ Z 1 SUBDIVISION > Subarea e - C E Blocks 16 & 17- Proposed Roads & Sidewalks 158,075 sf J G c LU I � � Blocks 16 & 17-Buildings, Walkways &Patios Decks 103,220 sf �- i Blocks 16 & 17- Driveways 27,875 sf O ��//' " // / ���/ Block 18- Future Roads & Sidewalks 74,400 sf w Y W ' '� / l� v LU z Block 18- Future Buildings Patios / Decks 106,450 sf C POINT OF ANALYSIS'B' o \ �/, i % ", / �� % j �� / ����� ���� �/� , �j Block 18- Future Driveways 38,475 sf O \\ VA (AT CONCENTRATED OUTFALL) \V�i / / ���/ /�j U %J+ ��' �/ �/ �� FactorofSafet for Other Potential Imp.Areas 10,000 sf (� / /! / 518,495 sf i Subarea CLd OF OVERLAND FLOW w/ A ELEV.=6' _ A / ��� �; /� / / ��� ; Blocks 16 & 17r Proposed Roads &Sidewalks 18,475 sf 450 jF CHANNEL FLOW \/� �\ ��� �\ / ! / / Existing Polo Grounds Road 44,250 sf v \ / ,� _ Q 3o F0J2ESTED/REPLANTED BUFFER ,., / .. �� �� 7 _ j /%j A' ���� /�� �� a ALONG POLOGROUNDS ROAD WATERSHED SUMMARY FOR SUBAREA A C7 - ���� r - o - 0 1 - o Area, 1 year FI w, 2 year FI w. 0 year Flow, CN ac. cfs cfs cfs CV a DA A (Post-Dev.) 82 6.37 0.09 0.14 24.35 a _ -- - __ � / _ _ - �� ,/����� / �� /�� �; /DAA(Final Buildout) 83 7.75 0.13 2.94 32.52 w `c WATERSHED SUMMARY FOR SUBAREA B L tu- E /// Cj Area, 1-year Flow, 2-year Flow, 30-year Flow, W u=i z �� \ s \ �/�j\ /////\\ L, CN aC. C5 C5 C5 JOB NO. a v� ---- - - - DA B (Post 82 12.16 0.18 0.21 9.14 182 ' 150 POINT OF ANAiYSIS'C' r '- - (RIPRAF-LINED STR€AMBEDBELO;N �.� -s' - ��� A\ V vi-//�--% DAB (Final Buildout) 83 20.08 0.27 7.75 75.32 v _ PROP-GSED-CONCENTRATEDOUT FAUL) % � VA �� SCALE vv v ESTRTA - V�R����\ �\ N \ A V�i/ �� WATERSHED SUMMARY FOR SUBAREA C �r- r c _ _ _ \ T NEL \ � SUBAREA C � \ -� Area, 1- ear Flow, 2- ear Flow, 10- ear Flow, _ CONCENTRATED OUTFALL \ ��� ,� �� ✓ \ 1.87 ac., CN=8 , Tc=0.10 hrs.\\��\� FCN Y Y Y SHEET NO. c I ® ✓/j II �� �� \ V A \ \\ VA ac. cfs cfs cfs o A�\ 1.87 3.70 5.12 9.91 15 PRE -DEVELOPMENT STORMWATER QUALITY PLAN: SCALE 1"=100' POST -DEVELOPMENT STORMWATER SCALE 1"=100' LITY PLAN: /A N / ROPO --- S E D SWM FOREST & .... OPENS E EASEMENT, TOTALING 5.45 ACRES, P . �... CP / / �( �IIIIII i C. 00 F\\ / o\ o o o000 o /- t00 �( i I � o �o'I i PROPOSED LIMITS �\ �� �` �� / PROPOSED LIMITS OF DISTURBANCE OF DISTURBANCE = �, �, 1� ��� �� A �� / , ,��° ENCOMPASSES ALL PROPOSED WORK o° „' l / 1 ASSOCIATED WITH THIS PLAN. THE LIMITS 26.25 ACRES OF DISTURBANCE DOES NOT ENCROACH INTO j \ o r' ' j THE SWM FOREST & OPEN SPACE EASEMENT, \ NOR DOES IT ENCROACH INTO THE SWM o `C _ ERV�A OPEN SPACE BASEMENT, /////// / \ 1 \ \ \ Au V SWM FOREST AND OPEN SPACE EASEMENT NOTE: THE SWM FOREST AND OPEN SPACE EASEMENT IS SUBJECT TO THE GUIDANCE SET FORTH BY THE DEQ IN THE VIRGINIA STORMWATER MANAGEMENT PROGRAM. THE AREAS WILL REMAIN UNDISTURBED IN A NATURAL, VEGETATED STATE, EXCEPT FOR ACTIVITIES AS APPROVED BY THE LOCAL PROGRAM AUTHORITY, SUCH AS FOREST MANAGEMENT, CONTROL OF INVASIVE SPECIES, REPLANTING AND REVEGETATING, PASSIVE RECREATION (E.G., TRAILS), AND LIMITED BUSH HOGGING TO MAINTAIN DESIRED VEGETATIVE \ / COMMUNITY (BUT NO MORE THAN FOUR TIMES A YEAR). WdP o � \ ° wJ o --_—� o / / /PROPOSED DISTURBANCES TO --/ GREENWAY ARE LIMITED TO A o UTILITY CONNECTION, A ROAD o N CONNECTION, TWO STORM o SEWER OUTFALLS & A TRAMWAY OO i I - o I_ o 0 O- 0 o o � q oSA � OO IA- ° o\ o o C / Q o o 0 Oo I Ilil Io A III I ® O 3 Q , � CO I o ' o of� \ o PROPOSED LIMITS o OF DISTURBANCE- 0 26.25 ACRES / O I I I I PROPOS`OD DISTURBANCES TO I' I I i GREENWAY ARE LIMITED TO UTILITY CONNECTION, A ROAD 1 CONNECTION, TWO STORM - SEWER OUTFALLS & A TRAILWAY L F f I2 o I�rl o o \ i 111i / po 1 / Of- 0 1 0� — I PROPOSED LIMITS OF DISTURBANCE \ ENCOMPASSES ALL PROPOSED WORK ASSOCIATED WITH THIS PLAN. THE LIMITS OF DISTURBANCE DOES NOT ENCROACH INTO j �\ THE SWM FOREST & OPEN SPACE EASEMENT, NOR DOES IT ENCROACH INTO THE SWM CONSERVED OPEN SPACE EASEMENT. , PROPOSED DISTURBANCES TO GREENWAY ARE LIMITED TO A / UTILITY CONNECTION, A ROAD g<, CONNECTION TWO STORM //�j SEWER OUTFALLS & A TRAILWAY Drainage Area to Level Spreader 'A' Proposed Development / Managed Turf 2.69 ac. j���/ Impervious Area 3.68 ac. / 6.37 ac. Full Buildout Managed Turf 3.10 ac. Impervious Area 4.65 ac. f l/ I II I �alg a "', �• I 7.75 ac. Post -Development Impervious Area Summary (For Proposed Water Quality- ESC LOD Boundary = VRRM Boundary) Blocks 16 & 17- Proposed Roads & Sidewalks 245,725 sf Blocks 16 & 17- Buildings, Walkways & Patios / Decks 176,690 sf 1 \ _ Blocks 16 & 17- Driveways 45,600 sf \ \\\�� I 468,015 s1/1 f s ® - _ , _ , , Total Phosphorous Removal Required for Blocks 16-17 (without any preserved areas) 19.58 Ibs/yr _Phosphorous Removal Achieved from the Level Spreader A's Sheetf low to Conservation Area, A/B Soils 6.89 Ibs /Yr Phosphorous Removal Achieved from a new Nutrient Credit Purchase BMP 6.02 Ibs/yr % �� Phosphorous Removal Credits from the Brookhill Development Applied to this Project 4.81 Ibs/yr \ ®, Phosphorous Removal Achieved from the BMP of the SWM Forest & Open Space Easements 1.86 Ibs/yr I 19.58 Ibs/yr SCOTT/R. CD,LLINS�Z Lic. No. 035791,1, Pow 2/4/22�� �`S'Inrrn T. E�Gl rq n � F- W C W �0u 0 Z 0 L u J 0 (� _� K o K O C r/ co U Z o N W O O Q w C F cou _ Z. ,,� W Q C V/ w a W Lu Coa W w a c > 'u W_ IN 11J N CD N oCD ti b ^ 'a N ti L L a ti > M s z N - � M L 3 �y7 z L Q ,C i I.l J a Cy) W_ N Z \ / W Q LLJ a L /� ■ � w C LdV < L v J Z — \ � Z ° Q w � O �10 w C s Q Z U a W O O a a Y J � `C w U1 U) Ul J J L w w Z z U) 0 w C W m C Of 0 0 CDx a N a IS JOB NO. 182150 SCALE 1 it=100/ SHEET NO. 16A DRY DETENTION BASIN W & U 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 FLOOR SLOPES SHALL BE GRADED TO PROVIDE POSITIVE DRAINAGE AT ALLTIMES TO THE RISER STRUCTURE. 3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE. 4. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY THE DENSITY OF THESE COMPACTED SOILS CAN BE SO GREATTHAT 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 FOOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. S. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. 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 VIRGIN IA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHT TO THE ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY. 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASH INGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY 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 BY THE DESIGNER. 14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENTTO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOTSTOCK. 16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90%CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR'S CONTROL. FACILITY CONSTRUCTION 1. DETENTION BASINS MAY SERVE AS SEDIMENT BASINS AND/OR TRAPS DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION POND IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN. 2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS A SEDIMENTTRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. 5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESE PHASE. 7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESE 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 ification Permeability ASTM D-2434 Cm/sec 1 X 1 Plasticity Index of Gay ASTM D-423/424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clay Particles Passing ASTM D-422 % Not less than 30 Clay Compaction ASTM D-2216 % 95%of standard Proctor dens source: Virginia awmiwater Nwa9emwL nanocioOR tiw9wi 9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. CONTRACTOR SHALL THEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP PROTECTION IF APPLICABLE. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW. 13. THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, IF APPLICABLE. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN. 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUB THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERI 4. INSPECTTHE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDE THAT MAY UNDERMINE EMBANKMENT INTEGRITY. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DI 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SP 7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHB OTHER FAILURES. 8. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATIO 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE 10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICALTO ENSURE THE BASIN s ARE PROPERLY CO CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSP SCHEDULED BY THE CONTRACTOR WITH THE ENGINEER AND INSPECTOR DURING T 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONT 3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS) 4. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND TH 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) 5. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DI 6. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) 375 375 EXISTIN GRADE a 370 30, 370 P OPOSED RADE PI RI SI FI 365 365 (S 362 362 J J O O W Lu n H 6 M L7 m m m m W LL u- PROPOSED id WIDE TOP OF DAM ELEVATION=373.0' ZOPOSED 30' WIDE VE PRAP LINED EMERGE 'ILLWAY w/4:2 SIDE S _TER FABRIC UNDERL TONE DEPTH=22"). SF ZEST ELEV.=372.67'. 0+50 BASIN A SPILLWAY SEE RETAINING WALL DESIGN, BY OTHERS, FOR CONSTRUCTION DETAILS, TYPICAL. 405 405 PROPOSED RETAINING P OPOSED WALL, TYP. G 0-GRID, 400 TYP. /t00 EXISTIN GRADE ROPOSED FOUNDATION, TYP. 395 X I 395 1 1 395 1 rGRADEI ti/I 1395 390 X 390 1 1 390 1 1/ 1/ 1 390 GRADE 385 385 1.5' MIN. 385 385 1.5' MIN 'n COVER COVER N 38o 38o PROPOSED 0120" 38o 38o ( CONTECH PERFORATED PIPE SURROUND IN STONE & WRAPPED IN A FILTER FABRIC, TYP. 375 � I 375 375 i � ) 01�INV. 375 INV. 372.09' �20" i372.35 370 370 1 1 370 w w N I a� w w N � rn 0 W W NO W W Ol cc 01 0 00 Pal on 01 Ql ri l7 l7 r^ orn M m a 1717 '^ m ^� om M m W LL W LL 0+50 0+75 0+50 0+75 UGD A-X-SEC#1 I"Kvl 5��>''l UGD A-X-SEC#2 1 50' (H) S OF NSTRUCTED. ECTOR ROLS) ROPOSE ACCESS MH w/ S IRS FOR PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE INSPECTION & MA NTENAN E, TYP. AL DAMAGE, EROSION OR UNDERCUTTING. PROPOSED 0120" PERFORATED CMP NICE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION NDERG OUND DETENTION SYSTEM @ 0.50% SPLACEMENT, WOODY GROWTH, etc. TR. Al 390 ALONG, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 60" H w/ LI OARD RISERS AS APPLICABLE FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR RI =384.0 PROPOSED ITr I =37i GRADE N, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED. SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING. TR. A14 1.5' 60" M W/ LID MIN. 385 BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE PROPOSED BASIN s FLOOR SHALL B SLOPED II=3 1.00 (030" A15) PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE TO DRAIN TO HE RISER (o.5%M N.) WITH XISTIN II=374. 5 (030" BYPASS) HE FOLLOWING STAGES OF THE DETENTION BASIN's CONSTRUCTION PROCESS: p SITIVE SLOPEST ROUGH Q UT. BASI FLOOR GRADE II=377. 0 030" BYPASS TO BE LINED ITH VDO CL. AI S ONE (18" I =370.90 DEPTH) FILTER ABRICU DERLAY ENTTO A/ iI(I REEL CETHE RISKOFCLOGGING. S R. Al2 II 38o E OUTLET STRUCTURE(s). ID STR A8 TO SERVE AS A RISER RIM=378. RECTING IF APPLICABLE) STRUCTURE. SEE DETAILS ON ELEVA FED 030° HDP ENCY B SHE 19B. RISER TO NCLUDE 0=367.17 EMER ASS A E 0" INNER DIAME1 ER WITH PIPES, INV_37 .50 A OPEN TOP & TRASHRACK TII=370,17 TOP OF WEIR RI =370.75 80.17' 375 PLATE= = 62 11 I0=362.80 ( 9 015") TO PREVENT FLOTATION THE RISER BAS SHALL B FIRMLY IO=364.55 ( 7 030") EMBEDDED 6" INTO AN 36" THICK REINFORCED C NCRETE TION THAT l 10 X2o, AND BURIED B STR. A6IN 601F MH M - FLOW 370 RI =369 20 W. IIN 370 RIFICEWI I =359.89 ------ EIR PL TE=372. 0' I =359.79 STR. A4 PROPOSED LEVATE STR. A7 UTFALL ST F OF 036 STR. A 5 30" INV. OUT=3 1.97' 60" MH CARRYI G LARG R STOR EVE NTS HOPE 1 22.05 LF O 036" RIM (60.40 F OF 030" HOPE 8.50 /° ORE @ 1 70% 365 II 359.09 PROPOSED LOWE 030" HD E 365 IO 358.99 INV.= PRIMARY CUTFALL 366.00 STR. Al 3. zLF 23. o ) 60" MH CON R 0 SHALL INSTALL O i 16.116 LF OF 36" RIM=362.35 EMBA KMENT N ACCORDANCE w/ THE �p°t° D H PE @ 4. 0% S•CQ��Q MA POSED DOT I =358. -yr = PR AO@� OT CL. At STD. E -1 STR. 5 6��pQ 10-yr EAK WS =371.4 JCY 3 60 V.= 35 STR. 3 14 LF F 030" 2-yr P AK WS =370.81 3 60 .25' ST .Al .00 1- r P AN WSE 370.6 _OPES& AYMENT - 71.92 L OF 030' 0.50% HOPE @ .50% PROPOSED 06" HOPE STUB PIPE @ 0.50% WITH VDOT STD. EW-12 HEADWALL. ILLWAY HOPE CONTRACTOR TO INSTALL A MANUFACTURED STEEL WEIR PLATE WITH A LOW -FLOW o PRO OSED ST . A LO ER OUT ALL 8. o CUT-OUT IN LIEU OF THE SPECIFIED TYPICAL FLATTENED 'EXPANDED STEEL MESH'. EW-12 HEADWALL OPENING TO BE COVERED WITH A LANE ENTERPRISES TRASHRACK, LF FOiS" DPE @ o. o%)CAR YINGT E IAPPR TREATMENT VOL ME FLOW TO LEV L OR EQUIVALENT. SEE SHEET 196 FOR EW-12 HEADWALL & TRASHRACK DETAIL. 355 OX. LOCATION OF X. 021" SPRE DER W. 1=362.80', 10=362.4 ) 355 S L INV 354.74 . A MIN. SEPARATION OF 1.5' IS REQ'D WW 'i 0 It In C\ ul 00 l0 00 f\ tD 01 N 0 N It N m 0) J J W W 06 6 'i N m 0 �t m l0 m 0l wi 06 H 00 n N 6 0 N m LD m LD m W m 'o m l0 m m ID m kD m n m m 00 M m o�0 n n 00 0l L9 W u- 0+50 1+00 1+50 PROPOSED FLAT VDOT CLASS Al, EC-1 RIPRAP OUTLET PROTECTION W/ GEOTEXTILE FILTER FABRIC UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A MIN. OF 9" (OP L=64', W1=9', W2=16', D=18") 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+oo UGD SYSTEM A AND BASIN A PROFILE SCALES 1"=5' (V) 1"=50'(H) 6+So 7+00 NOTE: 0120" WEIR PLATE DETAIL WEIR PLATE TO BE SECURELY UNDERGROUND DETENTION SYSTEM'A' BOLTED, OR SIMILARLY FASTENED, ( ) TO THE DETENTION SYSTEM. SCALE:1"=5' OVERFLOW WEIR IS HYDRAULICALLY 7.73' ELEV.=382.00' EQUIVALENTTO AN ORIFICE WITH AN (TOP OF PIPE) APPROX. DIAMETER OF 021.24" INSTALL TRASH RACKS ON ALL - ORIFICES, TYP. SEE SHEETigB FOR THE WEIR PLATE's TRASHRACK ON THE LOW -FLOW ORIFICE, OR EQUIVALENT. REINFORCED 12 GA. MANUFACTURE / INSTALL ONE (1) 03" LOW -FLOW STEEL PLATE ORIFICE IN THE STEEL WEIR PLATE AT THE LOW POINT OF ELEV.=372.00' THE DETENTION SYSTEM (INVERT ELEVATION 37z.o0') (BOTTOM OF PIP UNDERGROUND DETENTION SYSTEM 'A' STORAGE TABLE (E) (F) (G) DX B+F Facility Elevations Area of 120" UGD System Void Space of Area of Stone Storage Area in Total UGD System (ft) Perforated CMP (sf) Footprint (sf) Stone (%) (Sf) Stone (cf) Storage Area (sf) 371.50 0 3,321 40% 3,321 1,328 1,328 372.00 0 3,321 40% 3,321 1,328 1,328 372.50 1,500 3,321 40% 1,821 728 2,228 373.00 2,000 3,321 40% 1,321 528 2,528 373.50 2,291 3,321 40% 1,030 412 2,703 374.00 2,449 3,321 40% 872 349 2,798 374.50 2,500 3,321 40% 821 328 2,828 375.00 2,449 3,321 40% 872 349 2,798 375.50 2,291 3,321 40% 1,030 412 2,703 376.00 2,000 3,321 40% 1,321 528 2,528 376.50 1,500 3,321 40% 1,821 728 2,228 377.00 0 3,321 40% 3,321 1,328 1,328 377.50 0 3,321 40% 3,321 1,328 1,328 378.00 0 3,321 40% 3,321 1,328 1,328 378.50 0 31321 40% 3,321 1,328 1,328 379.00 0 3,321 40% 3,321 1,328 1,328 DRY BASIN 'A' STORAGE TABLE (HJ Facility Elevations (ft) (I) Area of Contours (Sf) 363.0 88 363.5 197 364.0 371 364.5 578 365.0 815 365.5 1,081 366.0 1,368 366.5 1,675 367.0 1,995 367.5 2,220 368.0 2,426 368.5 2,672 369.0 2,924 369.5 3,189 370.0 3,518 370.5 3,816 371.0 4,117 371.5 4,437 372.0 4,762 372.5 5,099 373.0 5,448 /A SCOTT/R. CD'LLINS'Z Lic. No. 035791 Pow 2/4/22�� �`S'IOXrn L. F�Ol ti r r N n � z w < F LU a � p L L O N z V Z F O_ W L J k Vl o o co J Zw p rn w f O U O a w Z Q W wLu Q L f H a m Ln W w a i Ln It � L '+ W N N N N C3 o ti b ^ O N Lr ZM M N M 1 C) W 0' LU N W> J ZJ U) - w H LU F- Q z� WL LU Ul Z LU LL U) JLLI ~ LL IIIIIIIJ � V O O C) N V / T� ,06 W Y U MO W J H� 2 O O m JOB NO. 182150 SCALE AS SHOWN SHEET NO. 168 r UNDERGROUND DETENTION SYSTEM (UGD)'A' &'B' REQUIREMENTS CONTRACTOR REQUIREMENTS: i. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 3 REFER TO THE APPROVED FINAL SITE PLAN FOR ANY DETAILED SITE INFORMATION. 4. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. S. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS. MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. GENERAL CONSTRUCTION SEQUENCE NARRATIVE 1. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 2. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. 3. CONTRACTOR SHALL EXCAVATE THE TRENCH. THE TRENCH FOR THE UGD SYSTEM SHALL EXTEND 3'BEYOND THE PIPES' SPRINGLINES. 4 3 5. CONTRACTOR SHALL WRAP THE EXCAVATED TRENCH WITH A 6 OUNCE FILTER FABRIC CLOTH. A SUITABLE FOUNDATIONS SHALL BE BENEATH THE TRENCH's FILTER CLOTHS. 6. TRENCH TO INCLUDE A 6" #57 STONE BED AT 95% COMPACTION BENEATH THE STORM PIPES. 7. CONTRACTOR SHALL INSTALL THE UGD DETENTION SYSTEM, INCLUSIVE OF THE OUTFALLS AND ALL OF THE ASSOCIATED STRUCTURES. 8. TRENCH SHALL BE BACKFILLED WITH COMPACTED #57 STONE IN 8" LIFTS AND SHALL EXTEND 6" VERTICALLY ABOVE THE CROWNS OF THE PIPES. 9. THE TOP OF THE #57 STONE SHALL BE COVERED WITH A 6 OUNCE FILTER FABRIC CLOTH, OVERLAPPING THE PREVIOUSLY INSTALLED CLOTH THAT SURROUNDS THE BOTTOM AND SIDES OF THE TRENCH. io. SUITABLE FILL REACHING THE FINISHED GRADE SHALL BE APPLIED ABOVE THE TOP LAYER'S FILTER CLOTHES, MEETING MINIMUM PIPE MANUFACTURER'S REQUIREMENTS TO PREVENT FLOATATION AND ENSURING PIPE INTEGRITY IS MAINTAINED. ii. A MINIMUM COVER OF 28" IS REQUIRED ABOVE THE CROWN OF THE DETENTION SYSTEM's PIPES. THE MINIMUM 6"OF#57 STONE ABOVE THE CROWN OF THE PIPES CAN BE PART OF THE MINIMUM 18" OF COVER. 12. SEE THE MANUFACTURER'S SPECIFICATIONS FOR ADDITIONAL UNDERGROUND DETENTION SYSTEM REQUIREMENTS. INSPECTIONS DURING CONSTRUCTION: CONSTRUCTION INSPECTIONS ARE CRITICAL TO ENSURE THE UNDERGROUND DETENTION SYSTEM IS PROPERLY BUILT. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER COUNTY INSPECTOR AND CONTECH REPRESENTATIVE PRIOR TO INSTALLATION. CONTECH OR AN EQUIVALENT PIPE MANUFACTURER SHALL BE CONTACTED WELL AHEAD OF THE CONSTRUCTION START DATE TO ENSURE ADEQUATE LEAD TIME FOR MATERIALS AND DELIVERY. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER, COUNTY INSPECTOR & PIPE MANUFACTURER, DURING THE FOLLOWING STAGES OF THE UNDERGROUND DETENTION SYSTEM 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. WHEN THE DETENTION PIPE SUBGRADE IS READY FOR PIPE CONSTRUCTION, BUT BEFORE STONE BEDDING IS INSTALLED. 5. AFTER STONE BEDDING IS PLACED AND COMPACTED, BUT PRIOR TO PIPE INSTALLATION. 6. ATTHE TIME OFTHE PIPE INSTALLATION. 7. AFTER PIPE INSTALLATION, BUT PRIOR TO PLACING BACKFILL & FILL OVER THE SYSTEM. 8. FINAL INSPECTION(DEVELOPA PUNCH LISTFOR FACILITY ACCEPTANCE) PLEASE ALSO SEE BELOW, UNDER FACILITY MAINTENANCE, FOR REQUIRED INSPECTIONS AFTER INSTALLATION IS COMPLETE. INSPECTIONS & MAINTENANCE AFTER CONSTRUCTION: THE FOLLOWING MAINTENANCE TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING THE INSTALLATION OF THE UNDERGROUND DETENTION SYSTEM. i. FOR THE FIRST YEAR FOLLOWING CONSTRUCTION, THE SITE SHALL BE INSPECTED BY THE CONTRACTOR QUARTERLY AND AFTER STORM EVENTS THAT EXCEED 21NCH OF RAINFALL. 2. THE CONTRACTOR SHALL LOOK FOR BARE OR ERODING AREAS IN THE CONTRIBUTING DRAINAGE AREA AND AROUND THE UNDERGROUND DETENTION SYSTEM AND MAKE SURE THEY ARE IMMEDIATELY STABILIZED. CONTRACTOR SHALL SPOT RESEED AS NECESSARY AND ENSURE ADEQUATE SITE COVERAGE IS PROVIDED WITHIN THE FIRSTYEAR. AT THE QUARTERLY INSPECTIONS, AND AFTER EACH RAINFALL EVENT IN EXCESS OFF', THE CONTRACTOR SHALL PERFORM THE ANNUAL MAINTENANCE TASKS DESCRIBED BELOW IN #3. AFTER THE FIRST YEAR THE OWNER SHALL PERFORM FOLLOW-UP INSPECTIONS ANNUALLY AND AFTER EACH SIGNIFICANT RAINFALL EVENT: 3. A SPRING MAINTENANCE INSPECTION AND CLEANUP SHALL BE CONDUCTED ANNUALLY. THE MAINTENANCE PROGRAM FOR THE UNDERGROUND DETENTION SYSTEM SHALL INCLUDE CLEANING IT ANNUALLY OF TRASH, DEBRIS & SEDIMENT AND ENSURING THE INTEGRITY OF THE TRASH RACKS AND OUTFALL & INFLOW PIPES. THE OWNER SHALL ENSURE THE SYSTEM IS OPERATING AS INTENDED AND IS NOT CLOGGED OR DAMAGED. THE OWNER SHALL IMMEDIATELY CLEAN & REPAIR THE FACILITY AS NECESSARY AND SHALL PAY SPECIAL ATTENTION TO THE INLET AND OUTLET LOCATIONS. THE ACCESS MANHOLES SHALL BE USED FOR INSPECTION AND MAINTENANCE. GENERAL SWIM NOTES: i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS IN THIS PLAN SET, OR EQUIVALENT, FOR DESIGN. 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH .1 SPECIFICATIONS. 3 4 3 CONTRACTOR SHALL HIRE ATHIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFFTRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN IN THIS PLAN SET. ALL EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BYAN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS AND PRESENT DURING THE CORE SAMPLING. . THE DOWNSTREAM EMBANKMENT SIDE SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM :1 SLOPE. 4 3 5 THE GENERAL CONTRACTOR,3 RD PARTY GEOTECHNICAL ENGINEER AND STRUCTURAL ENGINEER DESIGNING THE RETAINING WALLS SHALL WORK TOGETHER TO ENSURE THE SWIM FACILITIES AND RETAINING WALLS DO NOT UNDERMINE EACH OTHER. THESE PARTIES SHALL ENSURE THE STRUCTURAL INTEGRITY OF THE WALLS AND SWM FACILITIES ARE MAINTAINED. 0120" WEIR PLATE DETAIL UNDERGROUND DETENTION SYSTEM 'B' NOTE: WEIR PLATE TO BE SECURELY SCALE:i"=5' BOLTED, OR SIMILARLY FASTENED, TO THE DETENTION SYSTEM. 7.73' ELEV.=382.00' (TOP OF PIPE; ' OVERFLOW WEIR IS HYDRAULICALLY ELEV.= 380.1 7 EQUIVALENT TO AN ORIFICE WITH AN APPROX. DIAMETER OF 021.24" INSTALLTRASH RACKS ON ALL - ORIFICES, TYP. SEE SHEET i9B FOR THE WEIR PLATE's TRASHRACK ON THE LOW -FLOW ORIFICE, OR EQUIVALENT. NFORCED 12 GA. STEEL PLATE ELEV.=372.00' (BOTTOM OF F MANUFACTURE INSTALL ONE l 01o"LOW-FLOW ORIFICE IN THE STEEL WEIR PLATE AT THE LOW POINT OF THE DETENTION SYSTEM (INVERT ELEVATION 372.00) 390 390 NOTE: ANY DRAINAGE S TRUCTUFE WITH DROP I N EXCES 3 OF 4' ERTICAL Y SHALL HAVE PROPC FOR IN SED ACC PECTIO SS MH & MAINI STAIRS ENANCE A 1" THI K STEEL PLATE A T THE BC TTOM 01 THE STI ZUCTURE, TYPICA . �z 385 385 60" M RI 387.5 I =371.8 380 S R. BB10 I =371.3 ELEVATE 030" 380 EMERGE CY BYPASS/ RI burp MH =387.22 PIPES, V.=379.50' I =36.4 IC =366.64 STR. BBil TOP OF WEIR PLATE=380.17' 375 io6.81' HOPE @ F 036" 13.0% 375 STIR. STRUCTURE SHEET B136 TO SERVE 19B. R AS A RISER SEE DETAILS ON SER TO NCLUDE RECESSED RADE A 60" INNER DIAMETER WITH A - OPEN TOP & TRASHRACK STR. BB8 370 II=349. RIM=361.33 5 (06 ORIFICE) RI 61 MH =366.5 010" LOW -FLOW INV. IN 370 ORIFICE WEIR PLATE=372.00' IO=3 6.50 (BB5 036 II 360.79 IO 357.04 030" INV OUT=3 1.97' WSE=36256 10 -yr PEAK 365 PROPOSED 50' WIDE VDOTCL. AI RIPRAP LINED EMERGE SPILLWAY w/ 4:1 SIDE SLOPES & FILTER FA 1 CY RIC -yr P -yr PEAK - AK WSE=361.64 WSE=359.57 WSE=357.45 STIR. BB1 030" HOPE , PROM PRIMARYOUTFALL ED LOWER 365 EST 00') PROPOSED VDOT S D. EW-1 13 0 PROPOSED 1.0 lFW 0120" ERFORATED CMP UNDERLAYMENT (STONE DEPTH=12"). SPILLWAY CIR ELEV.=362.33'. (10' WIDE TOP OF DAM ELEV.=364 CONTRACTOR SHALL (INSTALL / `�' STR. BB NDERG OUNDD TENTIO SYSTEM @o.5o% EMBANKMENT IN ACCORDANCE 'w/ THE 51-54'5 036" DESIGN S OWN ON THESE PLANS. HOPE @11.40% 31 TR. BB4 r 360 RIM bull M 357.33 (MH2-MI 1A). A I 345.40 MIN.SE ARATIOII _ I -_ _344.65 OF 1.0' S REDID LOCAI APPROX. ION OF I X. 021"' STIR. B67 DIP S L (INV= 50.42f;. A MIN. "? 20.00' O 036" 355 SEPARATION OF 1.0' S REQ'D HOPE @ .So% 355 INV. OU =356.14' XISTING 35 O STIR. BBz 60" MH GRADE CONTRACTOR SHALL REPLACE STEEL WEIR LATE ATTACHED - (DESCRIBED BELOW) WITH A NEW 'ST PLATE -AFTER STABILIZED, OR tHEN T E ESC INSPECTO DIRECT COMES FIRST). P OPOSE�I WEIR PLATE BEL W IS SIZED WEIR PLATE IS S(ZED FOR BLOCK 16 & 17 AND THEPORTION TO THE RISER BLOCK-r THE OWNER (W FOR BLOCKS OF FU ICHEVE 16 & 17 URE BLO NEW K 18 35 O RI INV INV O =348.00 -14366 T=34316 SHOWN >N THESE PLANS? NEW WE IR PLATE TO INCLUDE (INVERT=350.00), OR A 1 q" x 1-4" SQUARE OPENING A 1-16" LOW WITH AN INVERT PROPOSED VDOT FLOW ORIFICE OF 350 00. D. ES-1 PROPOSED BASIN's FLOOR HALL BE INV. OU 343.00' SLOPED �O DRAIN TO THE ISER(0.5 MIN.) 345 WITH POSITIVE SLOPESTH OUGHO T. 345 CONTRA OR SHALL INSTALL A 12 x12" MA UFACi RED STEEL WEIR STR. BB .• -- 82.8o' O 036" -' :PLATE OVER THE RISER'S 06" LOW -.FLOW O IFICE 0 ENING. WEIR PLATE STR. BB 7.8S' OF'036" HOPE La 2.0°/" STIR. BB HOPE @ 1.30% - TO INCLUDE A 1 3" LOW -FLOW ORIFICE INVERT=350.00 , OR A 1-9 i a ( ) ie :.SQUARE OPENIN WITH AN INVERT OF35000. WEI PLATE 'sOPENING WILL DIRECT RUI OFF INTO THE RJSER's 0$" ORIFICE. A LAN ENTERPRISE TRASHRACK, OR EQUIVALENT, SHALL BE INSTALLED OVER T E WEIR &AFFIXED TO TH RISER. SEE LANE ENTERPRISE TR SHRAC DETAIL X 1-9i ie LATE ON 340 340 HOPE Cal 2. o% REVENT FLOTATION BEDDED 6" INTO A DATIC tHAT IS 1 THE RISER BASE 36" THI K REINF xzo', AN BURIED SHALL BE FIRMLY RCED C NCRETE BELOW ROUND. SHEET 19B. NOTE, TO REDUCE THE RISK OF CLOGGING THE CONTRACrOR SHALL INSTALL A 10'Lx10'Wx12"D CL. AI RIPRAP LIN D STONE PIT WITH FILTER FABRIC UIIDERLAYOENT AT THE RISER'S LOW FLOW ORIFICE UPROPOSED TO F EN FOUt A 335 ELEV: 34 BE KEYED FABRICT FLAT VOOT CLASS .00') w/ GEOTEXTILE NTO EX. ROUND 9" OVER LAPAMIN. OF9" i, EC-1 RIPRAP OUTIILET ILTER FABRIC UNDERLAYMENT. MIN. AT ENDS & ALONG OPL= 30' W1=9' PROTECTION (TOP FABRIC TO PERIMETER. W2=17' =18" - :OPENING. THE TOP OF -THE STONE PIT SHALL BE 12".BELOW THE LOW -FLOW ORIFICE, WHEN DIRECTLY BELOW THE LOW -FLOW ORIFICE TRASHRACK. 335 & J J W W l.7 w w O N m Ol M m O �t m Ol lD m N lD m n rl 10 m N N rl n lD m 00 01 0 n lD m m 00 lD .D ON M lD lD N 6 n ^ lD ,�� lD M O I� m L9 N ip M n m m ^ M p) 1p n 00 N 00 0+50 1+00 1+So 2+00 PROFILE SCALES 1"=5' (V) 1"=50'(H) 2+50 3+00 3+50 4+00 4+50 5+Oo UGD SYSTEM B AND BASIN B UNDERGROUND DETENTION SYSTEM V -- & DRY DETENTION BASIN'B' DETAIL: SCALE i"=3o' CONTRACTOR SHALL CALLTHE COUNTY INSPECTOR& ENGINEERING DEPARTMENT 24-HOURS BEFORE ANY ANTICIPATED CONSTRUCTION ACTIVITIES FOR THE BMPs. THIS IS INCLUSIVE OF WHEN THE UNDERGROUND DETENTION SYSTEM SUBGRADE IS READY FOR PIPE CONSTRUCTION BUT BEFORE STONE BEDDING IS INSTALLED. Ile41 \ r C n I I I ���� 0120" INV. 372.66' F-il PROPOSED ACCESS MH w/ STAIRS FOR I INSPECTION & MAINTENANCE, TYP. W 0120" INV. 372. 59' r/ I 0120" INV. 372.53' 2 / I 0120" INV. 372.46' I W I h ( \ 1 / 2 7 I 1 1 0" INV. 372.40' I 02 /......, 0120" INV. 372.33" !%0120" INV. 372:27'/ / 0120" INV. 372.20" 0120" INV. 372.14' a" 22.00' OF 0120" CMP @ 0.50%, TYP. PROPOSED ELEVATED 03o" HOPE EMERGENCY OUTFALL ' (14-75 LF, II=379-50, 10=379-00) � ■ i, III ■ III PROPOSED ELEVATED 030" HDPE EMERGENCY OUTFALL 1 (12.So LF, II=379-50, 10=374.SOY I PROPOSED 06o"MH WITH STEEL PLATE, RIM=386.00' I. i !I • • . y 1 • • •�� N II .4 , A 3 • III II IR P, Y 1 � w V OF 1 I , l� i CO M ID I IZD N \\\\ I I I`Kurublzuw3lb HOPE EMERGENCY OUTFALL \ 4 \ I (4.8 LF, 11=372.00, 10= 71.87) 5 3 � I I I A I' y � 1 3�0 \ j I J I NI S R. BBzd� I � \ \ W a a I / 1 \ �I It6' EXISTING WETLANDS TO ". ,�C�U,(J�Y DE�INF�W I I I I \\ \ REMAIN UNDISTURBED, s.PRLSE13VEQ STEEP, TYP. W SLOPES TYP,. W U3 I 382 I s s 1 s �s s s s � s W W W W S W W w 1 -� `;T B8 y y e PROPOSED io'WIDE TOP i PROPOSED VAR. WIDTH I - PROPOSED VDOT SWM & ACCESS ESMT. \ PROPOSED �' " W W W W ' OF DAM ELEVATION=364.0' I w STD. EW-1 \ GREENWAY, TYP. PROPOSED VARIABLE / PROPOSE VDOT STD. EW-1 WIDTHSWM"& W ACCESS ESMtz I 37 o \ PROPOSED FLAT CLASS Al, RIPRAP OUTLETT PROTECTION (TOP \ ` ELEV. 343.00) w/ GEOTEXTILE FILTER \ FABRIC UNDERLAYMENT. FABRIC TO BE i / _- ---- --- -- t I 1 I 364 \ KEYED INTO EX. GROUND 9 MIN. AT- \\ :Nos & ALONG PERIMETER. FABRIC TO i Ap.Y'F' STIR. 662 111101ill OVERLAP A MIN. OF 9" (OP L-130, ! / 00 W1=9W2=17', D=18") III sTlII ' I \ i .. Y• Sp �00 I B Y. 2+00Ln S`fR. BB6 �Io �F \ SEE THIS SHEET FOR PROPOSED VDOT SCALED PROFILES OF -F 36 \ -F I STD. ES-1 \ THE ALIGNMENTS (TYP.) ' �(0 _ _ 0 i � I i a 3 _ e PROPOSED BASIN s FLOOR. SHALL BE SLOPED TO DRAIN TO - p PROPSELD 5o WIDE VDOT CL. Al I � THE RISER LOPES I HROU H RIPRAP LINED EMERGENCY POSITIVE SLOPES THROUGHOUT. ( SPILLWAY w/ 4:1 SIDE SLOPES& 1 FIu J FILTER FABRIC UNDERLAYMENT +7� m (STONE EPTN=12"). SPILLWAY I u� u. � !_! " •a, ( PROPERTY REST ELEV.=362.33' I !c - d hII- PROPOSED STR. BB6 TO SERVE AS THE LINE, TYP RISER STRUCTURE. RISER TO INCLUDE A TOP TRASHRACK AND ALOW-FLOW ORIFICE r' \ \ I u F THAT CONTAINS A STEEL WEIR PLATE & TRASHRACK. SEE THE PROFILE ON THIS SHEET FOR ADDITIONAL INFORMATION. i TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY EMBEDDED 6" / INTO A36" THICK REINFORCED .r� CONCRETE FOUNDATION THAT IS 344 34 S !! ��- io'x1o', AND BURIED BELOW GROUND. ` - N -� OPOSED 6o"x6o" ULVERT � J DER SEPARATE SE LANS) (j 34 1o' WIDE GRADED, GRASS LINED ACCESS ROAD G FOR POTENTIAL MAINTENANCE. ACCESS 35 �r ROAD ENCASED IN VAR. WIDTH SWM & � ACCESS EASEMENT. ROAD TO EXTEND FROM PUBLIC RIGHT-OF-WAY TO THE SYSTEM. PROPOSED So'WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY & FILTER FABRIC UNDERLAYMENT (STONE DEPTH=1z" ). SPILLWAY 365 CREST ELEV.=362.33'. 365 Q ^ v' 36o 360 50 - ROPOS D EXIST NG GRADE GRAIME 355 355 O `9 O M LOLUUJOU�j m M m M PROPOSED id WIDE TOP OF DAM ELEVATION=364.0' 5+50 6+oo 6+5o 7+00 7+25 0+50 0+75 BASIN B SPILLWAY UNDERGROUND DETENTION SYSTEM 'B' STORAGE TABLE DRY BASIN 'B' STORAGE TABLE (E) (F) (G) (A) (B) (C) (D) C-B DxE B+F (H) (I) Facility Elevations Area of 120" UGD System Void Space of Area of Stone Storage Area in Total UGD System Facility Elevations Area of Contours (ft) Perforated CMP (sf) Footprint (sf) Stone (%) (sf) Stone (cf) Storage Area (sf) (ft) (Sf) 371.50 0 3,960 40% 3,960 1,584 1,584 350 2,672 372.00 0 3,960 40% 3,960 1,584 1,584 352 3,816 373.00 1,842 3,960 40% 2,118 847 2,689 354 5,127 374.00 2,456 3,960 40% 1,504 602 3,058 356 6,609 375.00 2,814 3,960 40% 1,146 459 3,272 358 8,268 376.00 3,008 3,960 40% 952 381 3,389 360 10,105 377.00 3,070 3,960 40% 890 356 3,426 362 12,089 378.00 3,008 3,960 40% 952 381 3,389 364 14,178 379.00 2,814 3,960 40% 1,146 459 3,272 380.00 2,456 3,960 40% 1,504 602 3,058 381.00 1,842 3,960 40% 2,118 847 2,689 382.00 0 3,960 40% 3,960 1,584 1,584 383.00 0 3,960 40% 3,960 1,584 1,584 It SCOTT R. CD'l Lic. No. 035791,E 2422 4' P �v 0 .c> l S G S 11 In>,rn T. E r rq n � F- W c` LL1 0 i u 0 u Z O u J Lu Q Z (� 0 U r/ V Ln CID LU it: Z w=J� N Q OO OV Q w F- CDu Z �� w w Q C / VLL,� x a H m LU w < a w ` W w a c > 'u ti ti N N W N N N N C3 ti L L a r � M s Zcyi C NIf - � 3 z C E J rn WN � U1 a WQC \ L c LU LU ZJ'o� / TI Z - w 06 LU 2 F- O LJJ c i W Q � Z= c z U Y a C L WO LU a Y J Lu F_ W M L.LI >� Ul J 2 O Zw Fz olf F O L z - U) O v z w ca C `a J C Q C C UI a O O N x a c 1- F- H JOB NO. 182150 SCALE AS SHOWN SHEET NO. 17 �w zw� - U I / 35 _ -- 35 _ 5 \ \I BLOCK LIMITS, TYP. O OO O 0 0 O l'� PEDESTRI AND TR BE BE C1 i POLO GR UN 344 34 ry / LULU w Z = 34 - -i v1 JJJ"' _ Ln -- H = 350 354- /Q LU 54 -- 35 6 3- LU 5 -- STM-B4 N- w- - 1 _ 34 Structure Area (Acres) i t, Min.) 4B 0.23 0.60 5.0 4 0.29 0.50 6.0 B10 0.53 0.80 6.0 B9 0.25 0.60 6.0 B8 0.22 0.50 6.0 B7 0.14 0.81 5.0 B6 0.20 0.69 5.0 B5 0.16 0.68 5.0 B4 0.29 0.76 6.0 B3 0.00 0.90 5.0 B2 1 0.00 1 0.90 1 5 APPROVED FEM - ,�� -� `� // `, - - , SUBAREA C's OUTFACE PATH DETAIL: A goo-vR \ j FLOODPLAIIIN LIMITS, TYP, 1� / I ... f SCALE 1"-30' 00000 3bo4 w w w w w w I \ ♦ w w w w w� I 1 I � I � 1 i A � �� � ♦ � � � I wwwwwww-w-� � I \ � � � I \ � � � !' ♦ � ,/ -� � , ♦ ♦ / ' 1 / / w 382 ��� � � ,) a - -� ♦ 4F/ ♦ / w w w w w � � i � '�C � , ,.♦ J� O � � �-- PROPOS, GREEl w I =_ I I 37 :� J _ LIMITS OF STREAM. TYP. ♦ / y � LIMITS OF WE AND .. T,T � W _ _♦ � Cb Y DEr�INF�f3� 3 4 �, ♦ / TYP. � V - P 1 / PROPOSE ION Y uY-(0 ♦ ' a % P ED S�TEE ♦ / �i SLOPES. TYP . w liar s a' ♦ I / / w ♦ / INLET SYJBAREAS, TYP: / Vt fl \ \ i ' I iT i � � ----- ♦ � / ,- ' / PROPERTY LIMITS. TYP: � I OPOSED m w w RUNOFF BEFORE IT SEWER, POLO GROUNDS / 3o'WIDE�NATUIRAL BUFFER ALONG j i RUNOFF BEFORE IT ENTERS POLO GROUNDS ROAD. w I w - PROPERTY's PERIMETER MINOR PROPOSED RUNOFF IS DIRECTED INTO THE POLO w w.w \ \ \ GROUNDS ROAD MANMADE STORM SEWER SYSTEM, � / WHICH DISCHARGES TO THE CULVERTS OUTLET / - PROTECTION LOCATED IN THE STREAM s BED. SEE THE / 3WIDE EFORESTEDED/ U - a , '� / ANALYSIS ATTOF CHED THE STORM SEWER YSTEM s HGLM CALCULATIONS PACKET FOR HE LL I A� \ PUFFER ALONG gllll� \� _ �'-- - - !COMPUTATIONS SHOWING THE io-NEAR DE SIGN STORM\\ V. \ POLO GROUNDS RD / =i, / �. IS CONTAINED WITHIN THE SYSTEM. ALSO NOTE, THE 2-YEAR DESIGN STORM IS NONEROSIVE ON THE PIPES � _ �� s i wWwwWwW :w\ww iI� Pill V � ♦to`s� vs`��\\� \ STM-68 �� � \ 1 / � f// wwwwwwwwwwwww I � 5 O � \ - • $TfVI-Bg � �/ w w w w w \ I I I l I I I I � \ \ \ \ \ � � \ \ � 35 1 o - -`i �\l_`- -� "_ If � STM-B- r I,wI wwwwwwwWwwwWwwwww`wwwwwwwwwwwwwww 1 \ \ \ \ \ \ \ \\ \\ � \ \ \ \ ! I \ \ \ _ STM-E7 a - - - STM-B1o, ♦��� � � 3s ' -- - v v 6 STM-B � -- MANMADE STORM SEWER SYSTEM OF PLAN D TO O TFALL THT STM-B2 \ \ PRO POSED STORM SEWER _ . \ I 3 - -- �� STORM SEWER SYSTEM CONVEYS RUNOFF TO THE \� \ S� V� I A V r an 4 RIPRAP LINED OUTLET PROTECTION LOCATED IN THE - STREAM's BED, WHERE SUBAREA C IS i% OF THE OVERALL CONTRIBUTING WATERSHED. NOTE, SUBAREA THE io-YEAR DESIGN STORM. r Cis RUNOFF IS NOT EROSIVE IN THE RIPRAP AND PIPES DURING THE 2-YEAR STORM EVENT, AND DOES NOT \ OVERTOP POLO GROUNDS RD. & THE INLETS DURING 3 _ \ \ \ / 0 �\ /v,�.V •�:� \ \ \ � A� I � I � / � � � 1 \ s �� v � � �` � ��� 'ram►r � NOTE: THE CONSTRUCTION OF THE PHASE II POLO GROUNDS ROAD IMPROVEMENTS (PROVIDED UNDER A SEPARATE PLAN) IS REQUIRED PRIOR TO THE ISSUANCE OF CERTIFICATES OF OCCUPANCIES FOR BLOCKS 16 & 17 OF BROOKHILL. THE POLO GROUNDS ROAD PHASE II IMPROVEMENTS ARE SHOWN ON THESE PLANS AND PROVIDE ACCESS TO BLOCKS 16 & 17 AND OUTFALL SUBAREA'C'. SCOTT R. LINS ZI Lic. No. 035791 2/4/22 �4 p�� 1� z �&LONAL ECG ro Z U z C r-4 � N ^ \ M C � N C rq P- Uj ZO z Uj L z o ,z w ` Q U)U) 3 F N O LU w a J ,zyi F Z i c !A M O a \// OU O O U s Z o m = z z O z O Q g O U 0 O f y F ff] W V O3 ^ z J J WLLI U) w Q x � w a w i > o m ow m W to � a w a w LU w � a N w N c w > `c W w w L s L C c � N ; W N " N - rn CD v Q ti b ^ O N C ti c C z C L L a � a ti M ZM N M z rn J W13- N Ul Q J_ W > a J 0 Z J > Ti z LU I w LU H06 LU O 1 '�wrr77 1� V z_ � Q Y W U Y OLU LHLUM J ZLU 0 Ul W O 13f o � � O Lu Lu CID JQ O o 0 N U W J G W ru Oce W JOB NO. 182150 SCALE 1 "=30' SHEET NO. 18 HUGGER SINGLE BAR, BAND FLAT GASKET BOLT AND STRAP (SBBS) FLAT GASKET CONNECTION DETAIL (SBBS) 2 2/311xl/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. 6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2 2/3"xl/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 41270TYP. 36" TYP. 36" SEE TYPICAL WBACKFILL DETAIL NOTES z z w w m 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. I^� TRENCH CONDITION EMBANKMENT CONDITION - !FOUNDATION DIAMETER MIN. COVER CORR. PROFILE 6"-10" 12" 1 1 /2" x 1 /4" 12"48" 12' 2 2/3" x 1/2" 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): PIPEs12";D+16" PIPE > 12": 1.5D + 12" la MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE (12.6.6.2): PIPE K 24": 3.0D PIPE 24" - 144": D + 4W 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 DIAJ2 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 3.0 3.0 12-42 48-72 3.0 3.0 3.5 4.0 78-120 3.0 3.5 4.0 4.0 126-144 3.5 4.0 4.5 4.5 '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., ACCESS CASTING CLiN WITH GRADE RINGS AS REQUIRED, TO REINFORCING TABLE�� BE PROVIDED AND INSTALLED BY "BEARING CONTRACTOR. MAYBE TOP MOUNTED CMP (AS SHOWN) OR RECESSED. w O CMP A B 0 REINFORCING PRESSURE INSZ PROTECTION RIM/FINISHED o L RISER (PSF) �. SLAB --- - 91 a GRADE _ __- _� VARIES O iv 4'0 #5 @ 10' OCEW 2,540 7T� e a e I ? a 24" 4,x4, 26" #5 @ 10' OCEW 1,900 �4 4.-0"0 #5@10"OCEW 2,260 %, 30" 4. 4 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' 38" #5 @ 8" OCEW 1,500 SUFFICIENT TO PREVENT a -- SLAB FROM BEARING ON p 42' S'-5-6"5-6" #5 @ 8" OCEW 1,370 RISER TO BE PROVIDED BY a w CONTRACTOR. 0B 11" TYP. 60 #5 @ 7" OCEW 1,210 ,..i N N SECTION VIEW 48 6'x& 50" #5@7"OCEW 1,270 N N ACCESS CASTING NOT SUPPLIED BY CONTECH cs 0 A 10 ;` P B #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), __ SEE NOTE 7. _ ___ Ik---- _ �T t- - - ,% - 00 Q� i )1 �\ i<L� j l �" L 14 iT - �I�\ OPENING IN PROTECTION -- SLAB FOR ACCESS SPECIFICATION FOR CORRUGATED STEEL PIPE -ALUMINIZED TYPE 2 STEEL INTERRUPTED BAR 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 AT THE OUTFALL STRUCTURES SHALL BE IN ACCORDANCE WITH AASHTO STANDARD WITHIN THE UNDERGROUND DETENTION SYSTEM. THE ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II 2. ANY RETAINING WALLS AND FOUNDATIONS CONSTRUCTED IN APPLICABLE REQUIREMENTS OF AASHTO M274 OR ASTM A929. OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS THE VICINITY OF THE UNDERGROUND DETENTION SYSTEM AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR SHALL BE REVIEWED AND APPROVED BY THE STRUCTURAL PIPE CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE ENGINEER AND A GEOTECHNICAL ENGINEER. WITH THE SITE ENGINEER. 3. THE ADJACENT PUBLIC ROADS & THE GRADED ACCESSES THE CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE WILL SERVE AS ACCESS TO THE UNDERGROUND DETENTION APPLICABLE REQUIREMENTS OF AASHTO M36 OR ASTM A760. THE IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO SYSTEMS. 4. CONTACT COLLINS ENGINEERING (434.293.3719) REGARDING PIPE SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. ANY QUESTIONS CONCERNING THE UNDERGROUND DETENTION THE PROJECT PLANS. SYSTEM. 5. ALL FILL EMBANKMENT MATERIAL SHALL CONSIST ALL FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE PREDOMINANTLY OF SOIL AND BE PLACED IN SUCCESSIVE UNITED STATES. UNIFORM LAYERS NOT MORE THAN 8 INCHES IN THICKNESS BEFORE COMPACTION OVER THE ENTIRE AREA IN NTH THE CURRENT VDOT ROAD AND BRIDGE MATERIAL SPECIFICATION SPECIFICATIONS. 6. VDOT STD. IS-1 & ST-1 ARE REQUIRED ON THE NOT TO SCALE UNDERGROUND DETENTION SYSTEM STRUCTURES, INCLUSIVE OF THE OUTFALL STRUCTURES. 7. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL TEST -DIG AT THE EXISTING INLETS & OUTFALLS TO CONFIRM THE INVERTS AND TO ENSURE THE PROPOSED --1'4"� 2Y2" GRADES CAN BE ACHIEVED. CONTRACTOR SHALL CONTACT COLLINS ENGINEERING OF ANY DISCREPANCIES IN THE HORIZONTAL OR VERTICAL ALIGNMENT PRIOR TO ORDERING AND CONSTRUCTION. ALL STEEL PER B. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION 3/4 (#6) REBAR CAN BE CUT FLUSH - ASTM A36 MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION TO OUTSIDE OF RAIL INDUSTRY (29 CFR PART 1926). (BAR LENGTH = 16%) OR BAR CAN 4 > 9. CONTRACTOR SHALL PROVIDE ADEQUATE STONE BACKFILL EXTEND BEYOND RAILY2"t ~ FABRICATION TOLERANCE: ±Y4" FOR THE UNDERGROUND DETENTION SYSTEM PIPES IN a FLAT BAR AND REBAR: MILL ACCORDANCE WITH THE MANUFACTURER's REQUIREMENTS. _ 3/8. TOLERANCE APPLIES lYP n �� m �� PLAN FRONT 48"0 to 90"0 FITTING REINFORCEMENT MAY BE REQUIRED BASED ON HEIGHT OF COVER AND LIVE LOAD CONDITION TYPICAL MANWAY DETAIL NOT TO SCALE CENTEI Rt HOLE w/ Y4" REBAR RUNG, WELD REBAR TO RUNG ON OUTSIDE OF STEEL RAIL 2Y2" x %" FLAT BAR SIDE RAIL 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 V-6" MAX. #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), - SEE NOTE 7. 2" COVER (TYP) �l I LC} -A fir --- II I�� II 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 LADDER RAIL TO RISER JOINT FO LADDER RAILS AND RUNGS (2) Y4" FILLET WELDS 1" LONG ATTACHMENT ANC L5" x 3" xY" 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 AND BOTTOM OF 3" LEG TO EACH VERTICAL CORRUGATION CREST (THESE ANGLES SHOULD BE USED FOR LARGER DIAMETER 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 22/3" x y" CORRUGATIONS (4)Ye" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELD EACH SIDE) L3"x3"x j6" 5y" LONG fa INTERRUPTED E REPLACEMENT, SEE NOTE 6. 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) L3" x 3" x 3/6" _ 5Y2" LONG (2)Y4" FILLET WELDS 1" LONG FROM EACH ANGLE TO LADDER RAIL LADDER RAILS AND RUNGS I�Ad►1 - - A (4)y6" FILLET WELDS _-- FROM EACH ANGLE TO CORRUGATION CREST (2 WELDS EACH SIDE) L3" x 3" x 3/8` 5Y2" LONG LADDER AND RUI In t z I w f � O , z O � Z " a U/ O U Zw o i" Ln J O O Q w � n . m i m j z Q t w L d i L w Lu � ce i W N N N N ao a+ o .� v cli� cM M N ® M (1) ly z IJ-I Q W NO Q N 0-6 W (� 0 J � z z J 0 ^ 1 ` (� T� Q ~ 06 0 O 0 � rl (n �' z= U Y W F- U Ln W O � Y uj 0 z u J I -I = W W ZLij� � LL.I ID O 0 C/) O Lli CD IOC J Q W U 0 O z O 0 � N u JOB NO. 182150 SCALE i SHOWN SHEET NO. 19A EW-12 BEVEL SLOT DETAIL 'PERMIT TED FOR EASY FORM REMOVAL) WEIR PLATE TO INCLUDE A 01-}" N T O LOW -FLOW ORIFICE OPENING A AL DIRECTING RUNOFF INTO THE 06" t• � �__ BNB PIPE. ALTERNATIVELY, A J"xj" SQUARE LOW -FLOW ORIFICE CAN BE CUT INTO THE WEIR PLATE. AT THE TIME OF THE FULL BUILDOUT, THE PROPOSED WEIR PLATE SHALL BE REMOVED AND REPLACED WITH _ Z1" 6" A NEW ONE CONTAINING A 01-;" LOW -FLOW ORIFICE (OR A SQUARE LOW -FLOW ORIFICE). f-I ISOMETRIC �- L PLAN ALUMINUM RIVETS OR BOLTS ,- 4" X B' ALUMINUM PANEL. c PIPE COUPLER TO BE CAST INTO ENDWALL. O.OBO OR 0- NUM THICK I FD COIFLER MV$T BE FUJI WITH OUTER SURFACE OF EW-12 ANDPROVIDE A POSITIVE CONNECTION FORD THE OUTLET PIPE (4" OR 6111. - ROLLED RN STEEL " 2" BLACK LETTERS PLACED 4 N. R ROLLED RAIL STEEL VERTICALLY ON MARKER POST AT 7.33 LBS./FT. PLATE WITH WHITE BACKGROUND 11 lD" FOR UNOERDRANS 1' 0" "CD" FOR CROS SDRNNS �i UNDERDRAIN OUTLET MARKER DETAIL SECTION A -A NOTES 1. TYPICAL ENDWALL TO BE PLACED AT THE ENDS OF ALL UNDERORNN OUTLETS,BMPoNG LOCATIONS WHERE UNDERDRAIN IS TIED INTO OTHER DRAINAGE STRUCTURES. ENDWALL TO BE INSTALLED PERPENDICULAR TO ROADWAY AND FLUSH WITH THE SLOPE. 2 OUTLET PIPES SHALL BE RIGID NONPEFFORATEO 5MQO714-BORE PIPE MEETING THE REQUIREMENTS PIPE I.D. SLOPE DAENSIONS CLASS AS CONCRETE CUBIC YARDS OF 70 PSI TESTED ACCORDING TO ASTM 2112. 3. EXPANDED STEEL MESH (FLATTENED) SHALL HAVE OPENINGS OF APPROX. �/r' X I" AND WEIGH APPROX. 0.82 LBS. PER SO. FT. MESH SHALL BE GALVANIZED N ACCORDANCE WITH ASTM A-123. THE MESH SHALL EXTEND A MINIMUM OF 1" ABOVE THE O.D. OF THE PIPE. AND IS A BARRIER FOR RODENTS, ETC. THE SLOT FOR THE STEEL MESH B TO BE CONSTRUCTED SO THAT THE MESH CAN BE REMOVED FOR CLEMOUT PURPOSES. 4. THIS ITEM MAY BE PRECAST OR CAST IN PLACE. CAST IN PLACE CONCRETE IS TO BE CLASS A3 (3000 PST MIN.). PRECAST CONCRETE IS TO BE CLASS A4 (4000 PSI MIN.). 5- STEEL POSTS SHALL BE GALVANIZED N ACCORDANCE WITH THE ROAD AND BRIDGE SPECIFICATIONS. AL N MARKER PLATE ALL E TM 09 ALLOY 6061-T6 OR 052-H F. HEETIN FOR lM lAl S SH B AS 82 0 5 38 S C O L H 4" 2:1 2'- " I'-2 ." 0.19 {" 3N 3'-9/4" 1'-1;�a 0.25 4" 4P1 4'-5" 1'-P • 0.30 fi' 2:1 2-1(V " 1 S�� 0.20 6. 3:1 4'-Y.- 14� �' 0.30 8" 411 - 5' 3" I' 3 -. 4 0.38 WHIL BA:KGNUUNU AND BLAI:K LLI ILRS SHALL COW ONM IV SLCINUN 7U1 DH IHL HUA) AND BRIDGE SPECIFICATIONS. 6. MARKER SHALL BE PLACED AT ALL EW-12 INSTALLATIONS WITH 2 INCH LETTERS PLACED VERTICALLY DESIGNATING LNDERDRA14S WITH "U)" AND CROSSDRAINS WITH "CD'. 7. MARKER WILL BE PAID FOR IN ACCORDANCE WITH SECTION 501OF THE ROAD AND BRIDGE SPECIFICATIONS. XV007 A COPY OF THE ORIGINAL SEALED AND SIGNED DRAWING IS ON FILE IN THE CENTRAL OFFICE. SPECIFICATION ROAD AND BRIDGE STANDARDS STANDARD ENDWALL FOR PIPE UNDERDRAIN REooE SHEET I OF 1 REVISION DATE 233 101.32 04/20 VRGINIA DEPARTMENT OF TRANSPORTATION M2 So' TRASHRACK DETAIL FOR THE STUB PIPE's HEADWALL IN DRY BASIN 'A': DIMENSIONS A:S•9(16" FLAT PLATE: TBDWtanc&coma o B-m• BAR STOCK: i&D by La ne&Contractor C"z118' HOLE SIZE: TBobrla.e&CPnvaator D:31/R" COATING: Yea E 22ie HINGED. yes F: TBD M Lane & Gonuaaor GZTBD by Lane & Eontramr I -, Dby Lane&Contractor Ol LAME TRASH RACK I LANE MODEL #126 AD126 I a 1 12/t5/00 MAINTENANCE INSPECTIONS: ANNUAL INSPECTIONS SHALL BE CONDUCTED IN THE NON -GROWING SEASON DURING THE FALL AND WINTER MONTHS. INSPECTIONS SHALL TRIGGER MAINTENANCE OPERATIONS AS REQUIRED. MAINTENANCE OPERATIONS MAY INCLUDE BUT IS NOT LIMITED TO, SEDIMENT REMOVAL, PERIODIC MOWING, REPAIR OFTHE LEVEL SPREADER AND ENSURING A DENSE HEALTHY VEGETATED GROUNDCOVER. MOWING SHALL BE COMPLETED AT LEASTTWICE A YEAR TO PREVENT FURTHER WOODY GROWTH AND SPOT RE -VEGETATION OFTHE CONSERVATION AREA BUT SHALL NOT EXCEED 4 TIMES A YEAR. THIS MOWING IS REQUIRED IN ORDER TO MAINTAIN A go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go%OF THE SWM CONSERVED OPEN SPACE EASEMENT. IN THE EVENT MAINTENANCE IS REQUIRED DURING THE ABOVE NOTED INSPECTIONS, CORRECTIVE MEASURES SHALL BE COMPLETED IMMEDIATELY. VA 9Sf-l)) LSTORM WATER DESIGN SPECIFICATION NO.2 SHEET FLOW TO FILTER OR OPEN SPACE KEY LEVEL SPREADER 100 EXISTING GRADE RIPRAP PLUNK POOL RIPRAP A1PRON ID• X iT TREATED IA7L TIMBERS OR CONCRETE LIP P LENGTH OF LEVEL SPREADER OD% f LIP TO BE BASED ON DESIGN FLOW AND ALLOWABLE VBOCFTY TOP OF LEVEL SPREADER -T ATA.V SHALL BE FLAT E 1-3 IN. COURSE AGGREGATE OR OTHER LINING AS DESIGNED FOR STABILITY PLAN VIEW DIMENSION BASED ON ufDIBR)RBED IXIEfwNp RMDE 54600:13ORLES& IFVEOETATED DESIGN DISCHARGE FLIER DTRW OR CONSERVED 2' MN mNw21LACE FF 10 FEET LABS 3 MIN Ta MIN 3 MIN Idal 12 MIN. DENTIN BASED O - - - _III- H REQUIRED STONE SIZE 1 I -I I I I I I = I -1 1-II l-l' 1 1 1 SECTION A -A Figure 2.4: Level .Spreader: Pipe or Channel Fioro to Filter Strip or J2#-rNet,Paa' Conserved Open Space StormRaxnl ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD W INCH RACK SHOWN DIMENSIONS IN INCHES (OR EQUIVALENT) PLAN n tI 11 1 SIDE VIEW StonnllaxT" Round Series for Concrete Manhole Put Na D11nA lime moc Man ID MrBOD ASN 17N 14H 78 � 24 30 111 21 14 4DPf 36 43 Rsd8 27 >B 54 . 48 57 RS60 27% lei 66% 60 70 *I Plastic SOWUf10113r Inc. CUS101ffR *'ah PO Butt 4396, WD1r1cs91x, VA UM ce 238 McCh. M], Winchester, VA 12603 111877.5727 Phone N84D17Z2.2219fm hdpiA.UFIastk-.P1ud.Axxrl nnur PLASTIC actuTIP19, No. �w2f'a ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTIONS CROSS BRACING FOR OVERHANG HOPE ANTI -VORTEX PLATE 'A' SEDIMENT BASIN'A' DRY BASIN'B'&SEDIMENT BASIN'B' GATE DROM P. APPD Or DETAIL I /2" zinc plaeetl hook attached with 3/8' fealener ®® ® 1/8" di., hale. s Cc ®� P Oil ®®® Isornctric 1/4" HOPE plate (optional) F V'' I - . * HOPE. aIructur.] pleelie with 0 2-1/8' hoiea and I/A" plate OOc anufaclurad by Pleatic 1 OOOSolution. fneor equal 1� 0000 1D 4. +1%Apf \" Sn NHL ��n fx. .nam with optional plate HDPF .atrue,ur.I ileelic ndh SceLIon 2-1/8" hole. and 114• plate manufactured by Plaeti. S.1W,one Inc or e9ua1 n/R' dia hoto 0 00 OO 00 Sincle BMP Elevation +rlla.. PLASTIC DERRIS CAGE SOLUTIONS P 0. Roe 43Be Kac,e,ta. TA ,, INC. 877-877-6727 re.pledr-mll,.rcc.m SWM CONSERVED OPEN SPACE EASEMENT LANDSCAPING REQUIREMENTS: IN ACCORDANCE WITH VA DEQ SPECIFICATION #2, NO GRADING OR CLEARING OF NATIVE VEGETATION IS ALLOWED WITHIN THE SWM CONSERVED OPEN SPACE EASEMENT. THE CONTRACTOR IS HOWEVER REQUIRED TO REFORESTTHE EASEMENT'$AREA WITH NATIVE TREES AND SHRUBS WHERE VEGETATION IS SPARSE. THE LANDSCAPER SHALL INITIALLY REMOVE ANY INVASIVE SPECIES WITHIN THE SWM CONSERVED OPEN SPACE EASEMENT. FOLLOWING THISTHE CONTRACTOR SHALL PLANTTREES 1o' ON -CENTER OUTSIDE OF THE SANITARY SEWER EASEMENT AND SHRUBS 5' ON -CENTER WITHIN THE SANITARY SEWER EASEMENT WHERE NATIVE SPECIES ARE NOT ALREADY PRESENT. THIS OVER -PLANTING WILL ASSIST IN THE AREA's FAST ESTABLISHMENT AND WILL ACCOUNT FOR MORTALITY. TREES AND SHRUBS WITH DEEP ROOTING CAPABILITIES ARE REQUIRED FOR PLANTING 1„ TO MAXIMIZE SOIL INFILTRATION CAPACITY. THE TREES SHALL BEA COMBINATION OF 21' CAL. ROTUNDILOBA AMERICAN SWEETGUMS (LIQUIDAMBAR STYRACIFLUA'ROTUNDILOBA') AND 2 z" CAL. PINCETON ELMS (ULMUS AMERICANA'PRINCETON'). THE SHRUBS SHALL BE A COMBINATION OF 2;" CAL. BUFORD HOLLIES (ILLEX CORNUTA 'BURFORDII') AND 2"' CAL. NELLIE R. STEVENS HOLLIES ILLEX X'NELLIE R. STEVENS'). AT THE COMPLETION OF THE TREE AND SHRUB PLANTINGS, THE CONTRACTOR SHALL APPLY A NATIVE SLOPE MIX TO THE GROUNDCOVER WITH AN ANNUAL RYEGRASS BY ERNST CONSERVATION SEEDS AT A RATE OF 6o LBS. PER ACRE, OR 1 LB. PER 1,000sf, UNLESS OTHERWISE SPECIFIED. THIS GROUNDCOVER WILL HELP TO ENSURE RAPID VEGETATIVE COVER OF THE SWM CONSERVED OPEN SPACE EASEMENT. EVIL 1 WC L SEE DETAL A l I•W-a9•dA- I x� 88��x 31 al FRONT ELEVATION A� 6 04 BARS a " C-C " EACH WAY. EACH FACE. - NOTES. 1. CONCRETE TO BE 4000 PSI MNM(M COMPRESSIVE STRENGTH. 2. IF PIPE B TO BE SKEWED THE OPENING WILL BE ADJUSTED TO ACCOMMODATE ANGLES UP TO 45'. 3. REINFORCING STEEL N ACCORDANCE WITH ASTM A-615 (REINFORCING BARS. 4- PIPE OPENINGS IN PRECAST DRAINAGE MATS SMALL HOT EXCEED 4 INCHES AT MY GIVEN POINT BETWEEN THE PPE AND THE PRECAST UNIT. S. DIMENSIONS SHOWN AVE MNNAI. ACTUAL MEASUREMENTS MAY VARY WITH MANUFACTURER'S TOLERANCE. 6. IN NO CASE SHALL TOP OF ENDWALL PROJECT MOVE FILL SLOE, DITCH SLOPE, OR SHOULDER. 7. HEADWALL TO BE REVELED IN ALL AREAS EXCEPT WHERE A CONFLICT WITH INVERT OR WNGWALL OCCUR. B. REVEL EDGE IS REC"RED ON THE HEADWALL AT THE INLET END OF THE CULVERT. SHAPE n HEADWALL AT OUTLET END MAY BE EITHER SOUAE EDGE OR BEVELED. BEVELED MORTAR 9. Y." CHAIFER MAY BE PRI ON ALL EDGES AT MANUFACTURERS OPTION. EW-WC ENDWALL FOR CIRCULAR PIPE DIMETER OF PIPE CULVERT p 1 12" 1 15" 1 18" 21" OR 24" 27" OR 30" 33" OR 36" H 1 2'-0" 1 V-J" 1 2'-8" 1 3'-2" 1 3'-10" 1 4d„ L 1 4'-0" 1 V-0" I 6'-0" I W-0" I UY-0" 1 12'-0" 0 1 V-TA" 1 9-W4" 1 0.-2.. 0-2Y," I O'-y/f' 1 o'-3y4'- b I 0'-T' I O'-N/" 0'-T/:" 1 9-2" 1 0'-21/:'• 1 --_3'• I 'irk lJ ®IN 6M E SECTION A -A 0 DO BEVELT INVERT a DETAL A DETAILB EW-UPC ENDWALL FOR ELLIPTICAL PIPE SIZE OF ELLIPTIC& PIPE CULVERT (SPAN x RISE) S K 0 23' !_14" 30" X V' 34- . 22" 3B" . 24" 42' X 27" 45" X 29" 49" X 32" 53" X 3L" H Y-q.. e 2.-7" 2:_g�. 3,_1. 3'-}. y_6„ L - q2 q-1T' 12'_1. O 0S/i O'-3%" 0.-4- 0.4Y,"0.4M. 0._5: 01.2_:y_�"s.: : b 02I ' O'-2Y4• 1 0'-3'* 1 9-3%2" I O'-3Y," 1 0'-4" 0•.4%i' ROAD X�5ADMD$ PRECAST ENDWALL FOR PIPE CULVERTS SPECIFICATION REFERENCE SHEET 1 OF , EVSION DATE 12" - 36" CIRCULAR AND 23" x 1411 - 5311 x 34" ELLIPTICAL PIPES qs f01.02 VIRGINIA DEPARTMENT OF TRANSPORTATION 302 2016 ROAD & BRIDGE STANDARDS SWM-OR PLAN VIEW NOTES: I. COST OF TRASH RACK AND DEBRIS RACK ARE TO BE INCLUDED N THE PRICE BID FOR THE STORMWATER MANAGEMENT DRAINAGE STRUCTURE. 2. STRUCTURE MAY RE PRECAST OR CAST IN PLACE. SEE SHEET IOW 3 FOR DETAILS ON CAST IN PLACE STRUCTURE. 3. WEEP HOLES SHALL NOT BE PROVIDED. ANY LIFT HOLES SHALL BE PLUGGED. 4. STEPS ARE TO BE PROVIDED WHEN HEIGHT OF STRUCTURE 15 4'-C" OR GREATER PROVE INVERT OF OUTLET PIPE. FOR STEP DETA'LS SEE STANDARD ST-1. 5. SEE STANDARD SWM-DR FOR DETAILS ON PLATE, DEBRIS RACK AND TRASH RACK. 6. MARK WIGHT OF STRUCTURE. IN BLACK• WITH 41" HIGH NUMERALS AND 1" WIDE HORIZONTAL STRIPES AT r INTERVALS FROM INVERT' OF WATER DUALITY ORIFICE (ALL VISIBLE SIDES). 7-THE PERMANENT STORMWATER MANAGEMENT DRAINAGE STRUCTURE, STANDARD SWM-IMAM BE MODIFIED D WHERE TSTORMWATER MANAGEMENT BASH IS TO BE USED AS A TEMPORARY SEDIMENT BASIN OR TEMPORADU NO RRY MODIFICATION DETAILSRUCTION. SEE . SWM-OR. SHEET IOW 5 8. THE SIZE OF THE WATER QUALITY ORIFICE SHALL BE SPECIFIED ON THE PLANS. ADDRIONAL OPENINGS IN THE STORMWATER MANAGEMENT DRAINAGE STRUCTURE TO BE PROVIDED WHEN SPECIFIED ON THE PLANS. /' TRASH RACK Okli4%1,p( 3 } SE rONCNOTE 3)g,Nr I 6 2 METAL I SEE NOTE 6 PLATE 2 IDEBRIS OUNO OR '� KN WATER DUALITY BOTTOM OF STORMWATER [7CUYUL��C�ERLT ISOUARE 12" MA%. MNAGEMENT BASIN OFFICE SEE NOTE OR 6" MIN. OPENING\Z (THROUGH ;E WALL7 S 7._4 I L__-_-__-__J 6" 5'•0" CLASS A-3 CONCRETE TO BE FRONT VIEW USED TO FLL SWM DRAINAGE SIDE VIEW STRUCTURE TO INVERT OF (DEEI RACK NOT SHOWN) DJTLET PIPE. SWM DRAINAGE STRUCTURE PRECAST STORMWATER MANAGEMENT DRAINAGE EREFERENCEN ROAD M`6IIDDGEE STANDARDS STRUCTURE 1105 SWEET 2 OF 2 REVISION DATE 114.02 08,10 VRGINIA DEPARTMENT OF TRANSPORTATION 302 SWM-DR STANDARD PPE HANGER OR . gg' METAL CLAMPS W17H HOLES l)R �W DIAMETER B IS M NITS I 3 I 2 J'-------+ I I I I 2016 ROAD 8 BRIDGE STANDARDS 3" MIN. DLAWTER TEMP. OtlFK:E STUBOUT. SCHEDULE 40 STEEL STUB, I FOOT. MON. LENGTH. 6" POLYETHELENE CAP TEMPORARY DEWATERING 1 1 DEVICE 2 I � I I • TEMPORARY WATER • P GU&ITY ORIFICE COVER PLATE PERMANENT WATER 1 1 QUALITY ORIFICE OPENING I I SIDE VIEW ASTM F667 OR MSHTO M294. FRD ONT VIEW ST0RMIWATER MANAGEMENT (TYPICAL DETAILDRAINAGE STRUCTURE S) (TYPICAL DETAILS) (STD.SWM-1TYPICAL) J /L WATERTIGHT FLEXIBLE 51 ✓C/ COUPLING FOR 8" DIAL ELE POLYETIELENE TURNG `8" DIAL SOLID POLYETHELEIE DRAINAGE TUBING WATERTIGHT FLEXIBLE COUPLING FOR W MN. DIAL STEEL PIPE TO B" DIA.POLYETHELENE TUBING DRAINAGE TUBING SHALL COMPLY WITH NOTES( 1. THESE DETAILS ME TO BE USED TO MODIFY THE PERMANENT STORMWATER MANAGEMENT DRAINAGE STRUCTURE WHERE THE STORMWATER MANAGEMENT BASIN IS TO BE USED FOR A TEWP MY SEDIMENT BASIN DURING PROJECT CONSTRUCTION. 2. GRADE $TORMWATER MANAGEMENT BASIN A$ SHOWN IN PLANS. 3. ORFCS(IF COVERED SIDE TSTMTHPERMANENT RHNISEB°1 ORIE) ARE TO BE WIHSOLIDE& PLATTESWHILE THE BASIBEING USED FOR SEDIMENT CONTROL. 4. OEWATERING DEVICE AND COMPONENTS AND TEMPORARY METAL PLATES (IF ANY). AS SHOWN IN THE DETAIL, RE TO BE REMOVED AND PERMANENT STEEL PLATE W17H WATER DUALITY ORIFICE IS TO BE INSTALLED WHEN BASIN IS NO LONGER NEEDED FOR SEDIMENT CONTROL. 5. SMILAR DEVICE MAY ALSO BE USED ON OTHER STORMWATER MANAGEMENT DRAINAGE STRUCTURES. B. COST OF TEMPORARY DEWATERING DEVICE AND TEMPORARY MET& PLATES ()F MY) SHALL BE INCLUDED IN THE BID PRICE FOR STORMWATER MANAGEMENT DRAINAGE STRUCTURE. 7. THE TEMPORARY B" DIA. POLYETHELENE DRAINAGE TUBING IS TO BE SOLID FOR THE LENGTH BELOW WET STORAGE ELEVATION AND IS TO BE PERFORATED ABOVE THE WET STORAGE ELEVATION. THE COUPLING IS TO BE WATERTIGHT. ��= SPECrq, ROAD AND BRIDGE STANDARDS STORMWATER MANAGEMENT (SWM) DETAILS REFERD SHEET 1 OF 5 REVISION DATE S02 114.04 VIRCINIA DEPARTMENT OF TRANSPORTATION SWM DAM METAL PLATE DETAIL (HOT GALVADED) �CONC.SWM DAM T- 2016 ROAD 8 BRIDGE STANDARDS XX Tnz D CONCRETE CRADLE PPE SINE INCHES CRADLE BOTTOM WIDTH (INCHES) CRADLE HEIGHT (INCHES) CRADLE TOP WIDTH (INCHES) INCREMENT, N CUBIC YARDS, PER LNEAR FOOT OF PPE 12 34 14 32 0.093 Is 38 15.75 35.5 O.ID IB 42 17.5 39 0.129 24 50 21 45 DAN 30 SB 26 5} 0.233 36 66 S1 60 0.307 42 ]I 36 67 0.380 o-gl o 1 ' -1 CONCRETE SHALL BE CLASS M I X BUT NOT LESS THAN 6" o 10 6/°51'1 X % IF THE PIPE 6 LND IN AN EXCAVATED TRENCH. THEN THE SIOE WALLS NAY CONFORM TO THE TENCH SHAPE - - - J (E THE TRENCH MAY BECOME THE CRADLE FORM). DE AIL FOR METAL PLATE AND SIDE VIEW OF SWAN CONCRETE CRADLE IS TO RE NSTA1Eo TINDER THE ENTIRE WATER DUALITY ORIFICE DAM WITH DEBRIS LENGTH OF CULVERT AT EACH STORMWATER MANAGEMENT BASIN. CONCRETE CRADLE IS TO BE PAD FOR AS MISCELLANEOUS TYPICAL SWIM DAM CONCRETE AND SUMMARIZED N CMC YARDS FOR EACH PIPE LOCATION MET& PLATE MST BE CONC. SWM RISER CURVED TO FIT CIRCULAR ROUND OR SQUARE lMITS WHERE APPLICABLE. 12" MAY. 6" MN. PIPE OR SWM DRAINAGE OPENING THIRQUCX WALL STRUCTURE DEBRIS VARIES 2Y116 RACK (4) VI.Y'wn IADHESIVE BO TL S.ELFBOTTOMW WATER ATNUTS, OF BASK g 1• oUALRY WASHERS --- I / (SEEORIF'CPLANS I ° I -- I I- L�METAL \ / FOR SIZE) I _ PLATE (Q ii' OA -L H10LE5 N DETAIL FOR METAL PLATE AND SIDE VIEW WITH DEBRIS RACK METAL PLATE DETAIL WATER QUALITY ORIFICE (NOT GALVANIZED) TYPICAL SWM DRAINAGE STRUCTURE ROAD AR`�s STANDARDS STORMWATER MANAGEMENT (SWM) DETAILS REEFEREANCE" DEBRIS RACK, METAL PLATE, WATER QUALITY ORIFICE, CONCRETE CRADLE SHEET 3 OFwee s REVISgN DATE (FOR SCUM DRAINAGE STRUCTURES SCUM RISER PIPES AND SCUM DAMS) 302 ,l<-OL VRGINIA DEPARTI.ENf OF TRANSPORTATION Splash Block Instructions Before installation of the Splash Block, or any 1 rain diverting accessory, make sure the grade around the foundation slopes away from the 1 house. There should be a 6 inch fall in the first 10 feet from the house. 4 10 Feet 6 in 1 d Patent-F for fitm low Water directing chevron pattern reduces washout AMERIMAX amerimax.com 1800-347-2586 Info@amenmax.com Hole for landscape spike at front of splashblock allows it to be secured to ground SPLASH BLOCK NOTES: 1. SPLASH BLOCKS SHALL BE INSTALLED AT THE OUTLETS OF THE DOWNSPOUTS LOCATED ALONG THE REAR PORTIONS OF THE HOMES LOCATED ON LOTS 7-22, 43-45, 117, 118 & 225-135. 2. THE AREA DOWNSTREAM FROM THE SPLASH BLOCKS SHALL BE STABILIZED PRIOR TO THE INSTALLATION OF THE DOWNSPOUTS AND SPLASH BLOCKS. SECTION A-9: TYPIC AL GRAPMCA3iL DETAII.S Homogeneous fill r=---------I I ` 4' min `jr�Cut off trench-4' below Suitable material Sal a rack L - - - - - - - - - - - J TYPICAL HOMOGENEOUS EMBANKMENT Perforated c, FOUNDATION DRAIN SI% BLANKET DRAIN ill or grovel drain Sand, ryont a rold( (Iran oudel Rock or grovel axk toe arI)in �Tnmsilion filter �Tran3ition filter CHIMNEY DRAIN TOE DRAIN Figure A-Ia. Homogeneous Ealbankments w/Seepage Controls EMBANKMENT NOTES: A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW MANDATING THE CONTRACTOR MEET THESE REQUIREMENTS Q Q ATA MINIMUM: THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95%OF MAXIMUM DRY DENSITY AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. TRASHRACK DETAIL FOR DRY BASIN B's LOW -FLOW ORIFICE: Provide Hill Lockable 1 Access I A2_ FLAT PLATE: a 24" FIAT ANGLE: C 2-1/8- EAR STOCK: pr¢z-18. HOLE SIZE E'TBD by Lane & COATING Yes Connartor HINGED' Yes f Lic. No. 035791,a 2/4/22 ��J Ln E I- Z F W f L O H z O u !A d C C V� O U � v GO LOU ZOF) LD � J 0 O1 Y e z < Lu C O O Q C U) w Co u j Z Q C DJ Dt ; LOU `u Lu ° -< w C `4 4 N N 111 � j N M M �N} co J 1 Z 1--1 Q �w 0- 0 N N C6 Vt Jz Z raeas C) A/2 I F- LU Q Mom/ W 0 O Q0 z 0 Q Ln ZQ 2 U Y LU 2: Y LU r'� LO 0 LI Q D J Q U) ,,,,,,,,,,,,J LU = LLI ZUj ~ 0 2: j:eB7TJ N 0 LU m L.I. V 0 O C) LOU U JOB NO. 182150 SCALE SHOWN SHEET NO. 198 Brookhill Stormwater Quality Summary Table Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amountof Offsite Credits Created (lb/yr) Amountof Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits(%) 1 4A Apartments Pond 11 Wet Pond 4.01 WP0201800051 0 1.27 3.7% 1 4A Apartments DP-4A Detention Pond w/ Underground Storage - WP0201800051 1 4A Apartments CDS-4A CDS Unit (Manufactured Device) 1.60 WP0201800051 1 4A Apartments LS-11 Sheetflow to open space REMOVED - WP0201800051 1 4B Apartments Pond 11 Wet Pond 0.18 WP0201800051 1 4B Apartments LID-4B Isolator Row (Manufactured Device) 3.38 WP0201800051 1 4B Apartments Pond 4B Extended Detention Pond 0.79 WP0201800051 1 4B Apartments LS-413 Sheet flow to open space 0.74 WP0201800051 1 - ROW Pond 11 Wet Pond 0.18 WP0201800013 0 1.09 3.2% 1 - ROW LS-11 Sheetflow to open space REMOVED - WP0201800013 1 - ROW LS-11 Sheetflow to open space REMOVED - WP0201800013 1 8B ROW and Block 8B Pond 10 Wet Pond 5.91 WPO201800080 0.68 1.53 2.5% 1 - ROW LS-10 LS-10 REMOVED - WP0201800080 1 - ROW LS-10 LS-10 REMOVED - WP0201800080 1 3 Section 1 Mass Grading Pond 4 Wet Pond 20.56 WP0201700037 (Amendment#2) 0.46 0 1.4% 1 3 Section 1 Mass Grading LS-4.1 Sheet flow to open space 5.14 WP0201700037 (Amendment #2) 1 3 Section 1 Mass Grading Wet Pond B Wet Pond 8.53 WP0201700037 (Amendment #2) 0 0 0.0% 1 3 Ice Rink ROW Pond 11 Wet Pond 0.38 WP0201800050 0.08 0 0.2% 1 3 Ice Rink ROW LS-11 Sheetflow to open space REMOVED - WP0201800050 1 3 Ice Rink ROW Pond 4 Wet Pond 0.89 WP0201800050 0.68 0 2.0% 1 3 Ice Rink ROW LS-4.1 Sheet flow to open space 0.67 WP0201800050 1 3 Ice Rink Pond 4 Wet Pond 2.20 WP0201800050 1 3 Ice Rink LS-4.1 Sheet flow to open space 1.79 Z0201800050 1 8A Senior Living Facility Pond 11 Wet Pond 3.70 WP0201900004 0.01 0 0.0% 1 8A Senior Living Facility LS-11 Sheetflow to open space REMOVED - WP0201900004 Section 1 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus Removal achieved w/proposed plan (lb/yr) Anticipated Amount of Offsite Credits Purchased (lb/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 1 Pond 4 Treatment Total 6.77 23.65 1 Pond 7 Treatment Total 8.11 TBD 1 Pond 10 Treatment Total 6.94 5.91 1 Pond 11 Treatment Total 9.68 8.45 1 Pond 4B Treatment Total - 0.79 1 Manufactured Devices Treatment Total 2.62 4.98 1 Infiltration Treatment Total 21.71 0 1 Wet Pond B - 8.53 1 Sheet Flow to Open Space Treatment Total 9.74 8.34 Section 1 BMP Treatment Totall 65.57 60.65 Section 1 Offsite Nutrient Credits Total 6.8 1 20.0% 1 1 3.89 1 11% Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (Iti Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 2 9 Townhouses Blk 9 Wet Pond Level II Wet Pond 5.87 WP0201800086 2.10 ° 6.2/ 2 10 Townhouses Blk 10- UGD Underground Detention (No Water Quality) - WP0201800086 2 11 Townhouses _ FYI: A 2.08 Ibs/yr credit is appied to the Blks 9-11 WPO 20200004 plan from the immediately adjacent Wet Pond B in WP0201700037 Amendment #2. This credit is accounted for above in Section 1's Wet Pond B's 8.53 Ibs/yr removal rate and is therefore not shown in Section 2's removal rate summary. _ WP0201800086 Section 2 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus Removal achieved w/proposed plan Ib r ( /y) Anticipated Amount of Offsite Credits Purchased Ib r ( /y) Anticipated Percent of Total Development Offsite Credits % ( ) Amount of Offsite Credits Purchased Ib r ( /y) Percent of Total Development Offsite Credits ( ) 2 Pond 12 Treatment Total 8.06 - 2 Sheet Flow to Open Space Treatment Total 1.67 - 2 Blk 9 Wet Pond - 5.87 2 Blk 10- UGD - - 2 Credit Appied from WP0201700037 Amendment #2 - - Section 2 Treatment Total 9.73 5.87 Section 2 Nutrient Credits Totall 6.8 1 20.0% 1 1 1 2.10 1 6.2% Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 3 13 TBD TBD TBD TBD TBD TBD TBD 3 13 TBD TBD TBD TBD TBD TBD TBD 3 12 TBD TBD TBD TBD TBD TBD TBD Section 3 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus Removal achieved w/proposed plan (lb/yr) Anticipated Amount of Offsite Credits Purchased (lb/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 3 Pond 13A Treatment Total 9.13 TBD 3 Sheet Flow to Open Space Treatment Total 5.95 TBD Section 3 Treatment Total 15.08 TBD Section 3 Nutrient Credits Total 6.8 20.0% TBD TBD Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 4 14 TBD TBD TBD TBD TBD TBD TBD 4 14 TBD TBD TBD TBD TBD TBD TBD 4 14 TBD TBD TBD TBD TBD TBD TBD Section 4 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (Ib/yr) Phosphorus Removal achieved w/proposed plan (lb/yr) Anticipated Amount of Offsite Credits Purchased (lb/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 4 Pond 13A Treatment Total 14.05 TBD 4 Sheet Flow to Open Space Treatment Total 0.04 TBD Section 4 Treatment Total 14.09 TBD Section 4 Nutrient Credits Total 6.8 20.0% TBD TBD Required Phosphorous Removal Rate (Ibs/yr) 14.17 1.12 6.74 29.94 1. To date, the total required phosphorous removal rate is 85.42 Ibs/yr and the total phosphorous removal rate achieved through onsite SWM facilities is 73.41 Ibs/yr. In accordance with stormwater regulations, the overall Brookhill Development is allowed to use offsite 5.68 BMPs (e.g. nutrient credit purchases) totalling a maximum of 25% of the overall required required phosphorous removal rate. 2. Actual purchased nutrient credits assoicated with the approved plans to date is 5.99 lb/yr. 3. Actual nutrient credits proposed to be purchaed that are assoicated with this plan (WPO 20210007) to date is 6.02lb/yr. Required Phosphorous Removal Rate (Ibs/vr) KNEW Required Phosphorous Removal Rate (Ibs/yr) TBD Required Phosphorous Removal Rate (Ibs/vr) TBD Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development OffsiteCredits (%) 5 16 Single Family Housing Level Spreader'A' Sheetflow to Conservation Area with A/B soils 6.89 WPO 20210007 0 07 5 17 Single Family Housing UGD'B' Underground Detention (No Water Quality) WPO 20210007 10.83 31.9°% 5 18 Single Family Housing TBD TBD TBD TBD TBD TBD Section 5 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (lb/yr) Phosphorus Removal achieved w/proposed plan Ib r ( /y) Anticipated Amount of Off site Credits Purchased Ib r ( /y) Anticipated Percent of Total Development Offsite Credits % ( ) Amount of Offsite Credits Purchased Ib r ( /y) Percent of Total Development Offsite Credits ( ) 5 Pond 14A Treatment Total 4.81 TBD 5 Pond 14B Treatment Total 6.42 TBD 5 Pond 15A Treatment Total 5.16 TBD 5 Pond 15B Treatment Total 5.14 TBD 5 Pond 16 Treatment Total 11.75 TBD 5 Grass Channel Treatment Total 2.1 TBD 5 Sheet Flow to Open Space Treatment Total 1.43 6.89 5 Blocks 16-17 Wet Pond - 0 Section 5 Treatment Totall 36.81 6.89 Section 5 Nutrient Credits Totall 6.8 20.0% 10.83 1 31.9% Overall Treatment Tortall 141.28 1 73.41 Overall Nutrient Credits Purchasedi 34 100.0% 16.82 49.5% Anticipated Treatment Total With SWM Master Plani 175.56 Notes: STORMWATER QUALITY SUMMARY NOTE: AS SUMMARIZED ABOVE IN NOTES #1-3, THE TOTAL PHOSPHOROUS REMOVAL RATE REQUIRED TO DATE IS 85.42 Ibs/yr FOR THE OVERALL BROOKHILL DEVELOPMENT. ADDITIONALLY, THE TOTAL PHOSPHOROUS REMOVAL RATE PROVIDED ONSITE IS 73.41 Ibs/yr FOR THE OVERALL BROOKHILL DEVELOPMENT. A MINIMUM OF 75% OF THE REQUIRED PHOSPHOROUS REMOVAL RATE SHALL BE PROVIDED ONSITE, AND TO DATE 85.9% IS PROVIDED ONSITE. COUNTY OF ALBEMARLE 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 seal of the preparing engineer or surveyor. B. The name and address of the firm and individual preparing the drawings on the tide sheet. C. The constructed location of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the following; L Inspection Records and photographs for pipe trenches and bedding, including underdrains. 2. Video Pipe Inspection for any pipes which are not accessible or viewable. 3. Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area maps for the drainage area 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 profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s), inlet and outlet protection, alignment and invert elevations compared to design. 8. Computations: For significant deviations from design, provide sealed computations verifying that the as -built condition is equivalent or better than design. 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical sections and linings. 10. Easements - Show all platted easements with dead book references labeled Facilities and drainage must be within platted 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 - bio£dter 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. Bio6lter media must be an approved state mix. 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are required to verify fill compaction in darns. 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. Required Phosphorous Removal Rate (Ibs/yr) 17.72 TBD Lic. No. 035791,E 2/4/22 403'33BSMT \\ 6• s° \ �\ 46A / 4/.00GA YDlA 4�I - // / j / 39333 3 � 3 - ., zJo 4oi, FF l✓ I i6B � TH Q LOT o� i / j �• LOT PROPOSED 8" HDPE ROOF DRAIN SYSTEM II J I♦ / / _ — W I 'w \� PROPOSED PUBLIC ] y° • W 45- 4 33 8 to PRIVATE DRAINAGE EASEMENT / ✓ ° y1 \ /- / _ \\ GAR s / DRAINAGE EASEMENTLINE ENDof /oT -1o Nszz VALLA % t i \ 3 .67GA // / LicTTNo. 035791 ^ I 75 / \ ­0/ 400. 30 .. 9kh � LOT 47 5 FUTURE PUBLIC GREENWAYTO BE g74 W 34 \ \\ PROPOSED DRAINAGE SYSTE 1 4o ROPOSED GUARDRAIL, ��SS Gti DEDICATED TO ALBEMARLE COUNTY / 374BG 29 ° ' 46 / o° 4 IONAL E� AT TIME OF FINAL SUBDIVISION PLAT, 73.67Bw 33 \ \\ dy / �x NOT NO PROPOSED GRADES SHALL EXCEED 2:1 S OPE PROFFER #2 OF ZMAzoi8000il� 9 PROPOSED 22" HDPE YARD DRAIN SYSTEM PERiRO � i � 31 _� 6 — \ \ \ �/ � F y 1 99 YD-1 w/ lo' PRIVATE DRAINAGE EASEMENT OPEN I /37oIC�lBG Xo� j �% axsO \\ ( Z�/� 68.67 BW 7 S PROPOSED PUBLIC SPACE / 3 , A 9 � \„ OTE: LOPES GREATER THAN 3a SHALL BE PLANTED WITH A IVE / 374fiW \ PO \\ ('� �� So DRAINAGE EASEMENT 4 m m PROPERTYBOUNDARY(TYP.) 368BG o \ o F%Qi I o z STEEP SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION z z P ,_ 74� - ��' '. 3z LOT 398.0o GAR � _ �.\S`°O �_000 � • :• I _ _ / ,�co � ,;/ SEEDS AT A RATE OF 6o LBS. PER ACRE OR i LB. PER i,000 SF. Ili � O O / 3 ovoff�_ u u H F- / PROPOSED UNDER ROUND I / /, Q / \ I8P 2 q0 \ / / 0 0 DETENTION SY TEM'B' / Q \ \ \ \ \ 39\3 jr PROPERTY BOUNDARY (TYP.) > o O O s \ M \ i et at 39E /' i ! / / % z a < Ln m _ a ; PROPOSED WALL396.63 FGFAR (MAX. HEIGHT=6').., o 13zA / / i 2 \,�� V A v M V A �� 4 lB / EXISTING PRESERVED o m > o A A // y A 3 STEEP SLOPES (TYP.) Z J O O EXISTING ioo-YEAR FLOODPLAIN (TYP.) j z v v 4.67 FFE v >� z VLu m m PROPOSED WALLf39 m GEO-GRIDSYSTEM w wP° W a a w w Ln Ln / Lu PROPOSED VAR. WIDTH SWIM � 93. GAS \ \ \ f / w FACILITY &MAINTENANCE ESMT I \ ` 394.33 I I // 374TW� � � ����z°fo ,•, • -'--,., t / � v / //� 3 � � / � / � � / / / / � �, 4 / � YD 6A �• � � 368 BG _, ✓/ / �- y w 366BW%-� I — / 393.67GAR v / �/ �•. �/� 38z ' _ �/ / / / ti N �._ �z% 9433 FF �v V/PROPOSED DRAINAGE SYSTEM - j / / 3 /N_ Q � � � � _ it N .-, EXISTING PRESERVED 3 333 SMT 3g STEEP SLOPES (TYP.) / / 3�J3.33 GAR A LOT l y PROPOSED�WALL LOT 394•0o FFE i / - 9 / / o / ' MAINTENANCE EASEMENT \ I / wWW w yWIN "R�/lMSTEENMT / -/ /'/ 374 TVA J)// wltoPRIVATEDRAINAGE EASE PROPOSED 386Bw GEO-GRID SYSTEM / / / .r W 366BW10 36 �68 BG WALLASTART Of L9 r STA. o+oo 366 BW38z _ // w II i PROPOSED PUBLIC � bRAINAGE EASEMENT / PROPOSED VAR. WIDTH SWIM CL / ,, I FACILITY & MAINTENANCE EASEMENT M PROPOSED VAR. 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WIDTH SWIM � \\ n SP CE ., ,� �35 � � � � / \ , W W " � ' l I I I I � � � � \ '' � O FACILITY & MAINTENANCE EASEMENT ul _j Lu 44 \ I / / / / / \ LLI 34 _v T i S `\ ae \ — // 1 1 1 \ \ \ \ \ \ \ \ J __ r X �> / W \ \ 6 \� V) PROJECT BOUNDARY TYP. �r � W � y � W ` � � � W W -�/ i 3 / < v / - w �1 -- -- --- 3 / A \ _ EX-B . — z y 30' POLO GROUNDS — \ 35 � � � 0 � � I i � \ ROAD BUFFER v /WWWWWW J 354 - � s 0 � I 1 350. , W \ I I -- Z / I O � v1�35_ � e- _ � \ — a I W W W S GRAPHIC ALE � 52 A-61 -- F- /---ETIE-IN TO STORM STRUCTURE INSTALLED WITH _ _� . 3 / = I \ �\ G F- -- — — — — PHASE z POLO GROUNDS ROAD PLAN `mot `"° v I ( ) w w G --- SUB-zol a \�� \ 34 _ /j \ ET = XN FE w SEE PHASE z POLO GROUNDS ROAD PLAN �� 7 7 / / _ A _� _� inch = 30 ft. a m ------ OR DRAINAGE IMPROVEMENTS, �- _ - SEE PHASE 2 POLO GROUNDS ROAD PLAN 1 \ \ \ \ JOB No. - FOR DRAINAGE IMPROVEMENTS, —1— \ \ 1H21SO —_------- SUB-zo17-u7 - _ o /� SUB-2o1 -11 — I 1 \ ---- \ 7 7 \ I \ \ v v A V�V _ 348 --- — I -�, s� 5 5 � (� SCALE _ 1 =30 _ 6 — -- _ __ SEE PHASE 2 POLO GROUNDS ROAD PLAN _�ci \ \ \ \ u i 4/C FOR PROPOSED POLO GROUNDS ROAD / \ , - EXPANSION & ENTRANCE DETAILS, �� / \ SHEET1N0. SUB-zol -11 % — _ 7 7 LOT'- I / I ' EXISTING PRESERVED / - - - \ 5 3 79 I 44z \ /, 5 STEEP SLOPES (TYP.) \ - `,..�: ��'�__, TCHLI - SEE ET 13 / / 4 yo.00GAl? / / ° So.67 FED LOT / \ \ 44 06 y5o.67 FF LOT PROPOSED 8"HDPE ROOF DRAIN SYSTEM w/ 8 k / LOT -EXISTING ioo-YEAR FLOODPLAIN (TYP.) / \ 21 io' PRIVATE DRAINAGE EASEMENT 7 PROPOSED SWM FOREST & / AR �� / / OPEN : 56.0o GA PROPOSED 12" HDPE YARD DRAIN SYSTEM 4 f 7 / / / LOT \ 448 OPEN SPACE EASEMENT / � 43�33 �E 43�,0o GAR LOT / / / / A SPACE �'�, �`� / � 43 V / � 4 FF LOT / � w/ io' PRIVATE DRAINAGE EASEMENT / OPEN / A \ 421.33$ MTV I y3i.67 FFE 22 / / / / / \ 4 .00 GAR/ bjo ° / 23 z, LOT \ \ 8%� // / V \, kkk / y8.67FFE �7/ �// o / �� �33GAR - �438 � SPACE � � � � � � � � �- 77 �I 20" I / i A / 7 �. h l -ry 4 GAR \ \ 430 8%/ / / \ \ \ / / LOT �/ // y / 50. FE SCOTT R. LLINS_Z Lie. No. 035791 p 11/12/21 471 / 429.00 FFE/ \ - / / , \ / / % 76 4 / / r r /! oo BSMT/ / \ \ / / \ \ t 42 44633 G R 446 y8<oo GA / v / w w / 4 z z / - 447.00F�E 4 FF OT // / wri 436 f f 431.0o GAR \ 436 / / zs/o / 1.6 FFE \ ` 7 _ o O a 43 7 LOT V A ��� // / 3 / 75/' u u 23 r \ A 43z j YD-iJ �j 0 0 0 0 / 19 et // 4z733 GAR �x _ A p _ - - / / ti�� / /o / 74 o 428.00 FFE 4�8 i._ - _ - - 4z9 ° / l 444 %/ _ 7 Ln 434 v d a u yi8.i7 BSMT / / / : `. oo GA 'HDPE ROOF DRAIN SYSTEM w/ PROPOSED iz„HDPE YARD DRAIN SYSTEMI I / s 4 LOT 10' PRIVATE DRAINAGE EASEMENT % m w/ io' PRIVATE DRAINAGE EASEMENT / 54B - ( /3 o � z z --3F _ - t z/o / 73 / v / PROPOSEDWALL > / / // LOT y 67C, 44 /v / zi GE SYSTEM z0 u u 43 33 O GRID SYST o. GAR / / 4� 4 F / END OF w w 43i.00 FFE � ° xh ° 2 YD-11 x STA. 8.5 V /Lu FUTURE PUBLIC GREENWAY TO BE / / �' �x � - / _ PROPOSED 8"HDPE ROOF DRAIN SYSTEM w/ / --_ � � 54 �/0 7 / N� w w DEDICATED TO ALBEMARLE COUNTY yz6.00 GAR -a /i io/PRIV E DRAINAGE EASEMENT 9,67 GAR AT TIME OF FINAL SUBDIVISION PLAT„ 4z6.67 FFE / /� c C / LOT H m m i6.6 BSMT / 4o v / I / I / LOT y0.33 FFE / /� % �� yy FF LOT // s PER PROFFER #z OF ZMA2018001 O 4 7 / 3 0 T 2 / O � �_ / w w !' - / 426 _ 4 / / 4 � 1 zoB 4i6 Tw W a a / 438/33GAR / // -- - 7 / / / >' 414136 w w k39.00FFE y / / /�v 41z.67BW Id. m m o / / ROPOSED DRAINAGE SYSTEM / �j,.. W w 4128G -- ° 410.67 BWl i / ! LOT 39 RASS x yzg.67 GA � 7 / 6. GA ti � - L ° / f •� / � 43 33 ti �`�� 418Tw o. FFE / / OUR'TYARD zoA v 4z3,67 GAR / / 44 / V / 43 33 YD- E �_ / 437.00 FFE 4 r 41z BG 3 FE t r38 / �( / YD-iH /433/ /0 /I 7%� A / J LOT 41o.6�eW 38.�'ioe 6Bw, 4 J y 7 / _ __ ---- I A LOT / / / / / 53 LOT PROPOSED iz" HDPE YARD DRAIN / / A ` / / / / 433 % / / - 43 / Wl io' PRIVATE DRAINAGE EASEMENT 4 4 PROPOSED DRAINAGE SYSTEM l I \ G / TtiV .67 GAR 70 i/ 408 o6.67BG Bw � o o N ho/a C C BG C / LOT � �TW 4z I i ! � i 6 BSMT - 43 � / I 1 yzo.00 __ -- :% / BOUNDARY /' ! 16 / � ! 1� yzz / / / 27 I __ \ / // / \ \ / / � 33GAR 6 � F/ � BW� l PROPERTYBOUN / 421.00GAR / / / / \ \ \ 4z .o / LOT \ t / /� FF 9 f° I 421.67 FFE i / / / / LOT Yp_3p 439 u.6 BSMT 26;! I v / / . � •, / 1 / T406 BG \ \ / / I \ / / $.b7 GA / Sz6 0 432 4 3/3 GAR 68 / ' 4o4.67 BW iLOT - / o / -FFE PROPOSED 8' HDPE ROOF DRAINS STEM w/ ! � 4 - 4z933 F x 4i" zo' PRIVATE DRAINAGE EASEMENT 410 TW 2 _-=-- j/ / / 36 / / yh / / LOT f /'j 4 /o / / SiA / GAR 7 4 0° 4o6.6GBw O PROPOSED 8' HDPE ROOF DRAIN SYSTEM wl 4 33 GA j 33 ryti °� io' PRIVATE DRAINAGE EASEMEL9 NT z8.00 F�E / / 35 FF / I LOT - _ ( / / LOT / / / LOT YD-1G xN°' 41oTW PROPOSED WALL ti 15 4z1 67F 'ER _ _ _ / / i / 7a/o/ i 7 z GAR 66 / I (M HT=6') Cl �5 4og.33 BG 4 33 1D / 35 / / 33 • f / / 408 Bw EXISTING MANAGED � j / _ - -k / 4z8 5z � o FF ,r' r Z d) Q 418.33 GAR 3° - PROPOSED oz" HDPE YARD DRAIN SYSTEM / 41 .o / 5.33 GA} / c° r \ LOT / STEEP SLOPES (TYP.) N 419.00 FFE ; wl io' PRIVATE DRAINAGE EASEMENT ,' / / / 4z6.00 FFE o START OF J 409�ooBSMT / `O / / / ro 65 f xh r' wALLB � _ . � ,- l q / I� CQT < / / / / / / LOT V � � !' � / . 7� . OPO 51 � � •� by � / sTA. o+oo \ � d' n 34 - /I O� YD 3C \ \ \ 2.67 G�XR 6 �,\ / / / 4z3�33 �oQ 3/o LOT. % / / / - N -I 41 / / \ \ / 7/o Lah oo G_ AR 64 / / PROPOSED GUARDRAIL (TYP.) ' CA ' O / / / Y / o° �OQ10 . I �°04 LOT I I QOa 3% / i7.00GfR YD-_B / / LOT \ yv °fo j/ oo / N FF % a � / / V Q / LOT YD-iF x FFE ti yz} OTE: SLOPES GREATER THANz SHALL BE PLANTED WITH NATIVE I 415:67,GAR -- 4' �7 67 33 \ I / 4az y oo GAR 63 ti / '° ' STEEP SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION Q J y I 416.33 FFE I ' 4 .o / / \ / I / y�6. FF PROPOSED 8 -HDPE ROOF DRAIN SYSTEM w/ Jew o LOT �/ ° O SEEDS AT A RATE OF 6o LBS. PER ACRE, OR i LB. PER i,000 SF. Q 4o6.33 BSMT / / / 8.0o GA z/o / LOT io PRIVATE DRAINAGE EASEMENT j�� � y _ „ �414 zgLOT / �� / �c /, W yi8.67 FEE / 62 / �Q J�. 32 / / / z ,00FFAR h Q ROPOSED DRAINAGE STEM - J I --I Q PROPOSED 8"HDPE ROOF DRAIN SYSTEM w/ S°h / ho % 4 ¢ / ti / - J \ / 6.0o G R / 506 : x ° / NOTE: NO PROPOS D GRADES SHALL EXCEED za SLOPE. d - zo' PRIVATE DRAINAGE EASEMENT y'> Q 4oA yx6.67 E k ; 67 GAR 61 z oh r� Q0 j / CO o LOT �_ LOT �. 50A - 4a8 4 3. FF / �� ti 'r�0 - / - --- LLI 1 W --- I I �3 5% 4° // r/ 3g //o/ w 5° , 413.00 GAR- y:6o GA / s� _ /' . yi3.67FFE I b \ YD-3A // / y14.67F/F 4�6 ^ z FF j% i8A / o / F / � _ J ��( a 403.67 BSMT ., _ . ( ", a \ LO / 5 / x°o \ \ \ LOT f �*� W - yio.o U 06 \ \ � \ \. 30/ / LOT�� 1 U' I II, I LOT 4% \ \\ yio \ � \. ,\ \ YD 3 / , 4z2 / /. / o GA 58 YD-1D PROPOSED iz"HDPE YARD D( RAIN SYSTEM "°' / ; = �-� � / � � z - / / y .o R / w/ io' PRIVATE DRAINAGE EASEMENT / EXISTING STREAM (TYP. 1z '-' \ ° .. FF /� �r F 410.33 GAR $ / titi 43 p /.. / / LOT // xho / 3` / ~ � yu.00 FFE - -g -` / oo GAR 57_ / tih f �� U 401.00 BSMT �° \ PROPOSED 12HDPE YARD/ROOF DRAIN SYSTEM / ///� � FF _ -- U) O UD \ E EASEMENT s 7% � LOT / ro i l PROPERTY BOUNDARY (TYP.) / _ .__I - b OPEN SPACE w/io'PRIVATEDRAINA / 5 \ / r - M - - y86 408 �Po GAR 6 �/ 416 " LLB W J '2 FF./ � / fo 17 0 Lu w LO� d titi / d.67 GAR 55 0° F- J % C F� A ° F v y8A /3a/o / ,_LOT- PROPOSED 8" HDPE ROOF DRAIN SYSTEM w/ i �40& GA ', A -1 .- / S4 DRAINAGE 0 a i J 408.67 FFE W \ PROPOSEDiz"HDPE YARD DRAIN SYSTEM 40/ g 87GAR �- 398.67 BSMT % / 4 4 '"4og. FF /` i PRIVATE DRAINAGE EASEMENT � ' • r 4 r y y PROPOSED DRAINAGE SYSTEM ofo / I P P EN o� GAR \ �/ f �yo O RO OSEDGRE WAY(TYP.) <, M LOT \ C +'1 366\\ o °• f .: .. // // 10 ° \ i/ / GAR 52 l / o PROPOSED SWM FOREST & �u 4o5.00GAR\ \ o I, 398.z5 0° / y .33 / ° I \ yx /z% /yo5. FF PROPOSED 12 HDPE YARD DRAIN SYSTEM • OPEN SPACE EASEMENT w i / F 395.67 BSMT X ti / LOT / w/ io' PRIVATE D INAGE EASEMENT / ,r A y .00 GA 1 ��3o/p 03: FF io 5- _ 16 y�x., // i p w ,EXISTING PRESERVED r 6A / OT // / / 4io // x STEEPSLOPES(TYP.) \ / o \\ 3 / - / / GRAPHIC SCALE' a Lu 50 3" �5 30 6" JOB NO. o2.67 GAR( I8215 0 346 439333 BS IN FEET SCALE LOT \ \ \ p" / / / 0 PROPOSED 8" HDPE ROOF DRAIN SYSTEM wl•,a xh° j / 1 inch - 30 It. I II =30' PROPOSED PUBLIx° C 9 = \\ yq, o 45 / 4 33 GqR 48 io' PR VATE DRA NAGE EASEMENT o� o' DRAINAGE EASEMENT 3 �� 4oi, FF / / / SHEET \ 4 END Of _ WALLA 6 . 1j-/ / 3. 7 47 LINE SE 12 A H E 11 / / \ EET NO • 5\ GA // c� / �77� //PROPOSED WALL yzorW _-w w w w w \ w DEDICATED TO ALBEMARLE COUNTY S oiC PROPOSED WALL' : i / i / / / (MAX. HT. - 4') 418.o BG 2 H. w w/ w w y✓ w w w w„ w AT TIME OF FINAL SUBDIVISION PLAT, w w \,06..6BW �� / MAINTENANCE EASEMENT ,r - _ _ i h / /� PER PROFFER #z OF ZMAzoi8000ii END OFF w' w w w.. w. -./ � w _.. w w w v� w w w 4zzTW \ / j y� i .. �� 418.o BG WALL H PROJECT BOUNDARY P. / ... STA. 1+62 v% w L v' w.-= w w - w w w!. w w PROPOSED 416.67ew 430 i / PRO i PROPOSED WALLS �� i 4zz / SCOTT R. LLINS'Z FUTURE PUBLIC GREENWAY TO BE w w w w w ,- w w w w w w w .. w'. w w_ i` J OPEN SPACE EASEMENT z / / POSED SWM FOREST& i 1aBG 41 / 418T / DEDICATED TO ALBEMARLE COUNTY (MAX. HT. = 6') ! - U Lie.No 0357 1 OPEN SPACE EASEMENT / - y>_ w - �U w w �� ��. w w w w w w r w �� �w 4i667B 16 �i667BW �Z \ / / d 0 4 / ATTIME OF FINAL SUBDIVISION PLAT, 14 4 no 11/12/21 "j i w i w v w /w w w w w - w w � -v - 4- m r / PER PROFFER #z OF ZMAzol800011 PROPOSED WALL ww . . - °w w w START of %16y6:618�� �4z4� ' �� \ S70NAL \ r WALL END OF,,/GEO GRID SYSTEM \ / S WA +L o w w _ w w w _ �, w , „w ' w �. w - ti w w --w STA. o+o / w 3 4 .38o TW., i�fW ,� `�'392TW� _.o BG i _ \ PROPOSED WALL... w -� 8o T\%J'. 3888W 3a6 BG w 386 BG % .394 TW / 41g 3 �. 3g4gAry 384BW ,388BG 398TWw w, �' �WALLOE "EXISTING PRESERVED ✓'�' w 4198jl �.V A \ � 1 0r" 44 y GEO GRID SYSTEM 374 BG w 390 TW oo TW 386 BW 392 BG / STEEP SLOPES (TYP.) 17.67 BW 20 37z BW 384 BG 394 BG 98 TW 390 BW / STA. 5+32 j % 12 4 18 BG A 82BW �,. y-0 /�.. \ w ,�.. ,<\1,.. 4 18 BG 4 �.'� I ..LOT \ F 392 BW g88G, 394BG.. / '4zz �16676W 416.6 BW' -IV A-.-.PROPOSEDWALL I 0 z z _ _ 39z BW' 4o4TW / A\ / MAINTENANCE EASEMENT 4z:67 GAR r 1 \ _ 388 TW 3g6 BW - / 4 i /.. - II � \ + w w -382 BG \ w w w 496 W 398 BW �� - i 02& BG/ 1\\ \ / 3.33 FFE o O yoz TW v T 1 / o - 396 B 396 TW 9, oz BG _ _ \ \ w 39$ W ' ' i ' 394 BW - 390 BG 400 BW Q --- \ \ \\ �% ,% \ \ 134 441.00 GAR \ - _ - _ \ z F- H wALL D j - _ \ / COT �- \ 441.67 FFE \ \ i 0 0 w .v 3 390 BW \ E + --388 BW- --- j -404, \ �: _ \\ / O 2°k �2A \ i \ \ / _ i - `r I. \ 43�fi7BS ° /� � o 0 STA.453 / I I. I _ --' \ �\ \\� AVA 4 \\ 13-3 437�GAR \. "i„° 02$ df - - � 8. FFE- � A - �-- 71 16+0o r. o J a ¢ .. ¢ m m \ m o�3 \ \ 12 "�� LOT r LOT y .00B3M w \ w w w 390 BG LOT 88 BW O _ I- - _ 132 43z.67GAR \ O i o T. �+ \ \ PROPOSED SWM FACILITY & ��M ro� / PROPOSED WALLS 4140o GAR 12$°� % 43333 FFE % ` i5 ��'` +5 PROPOSED z0' PUBLIC u � / w w 1 0o GAR LOT lA /EASEMENT,Z z z l o DRAINAGE w dt MAINTENANCE EASEMENT m o m / A 41467 FFE -- \33 BSMT � o f y w 0 m 0 0 s' (MAX. HT. = 6') 404.67B5 4 4 131 4z7.00GAR\ _ -- +00 v w �x % z O O V J 414.67 FFE `�o LOT 4z7.67 FFE _ y5 1 �w b /� 7z6 o ¢ V V 1 r 3saTw m° / 1 6 GAR ' \ \ / 0 1 I 40 .67 BSMT - LOT 130 4 7.67 BS \ 8°/ -. ___ 44a - 73 / H z W w w w w 382BG 4 3 7 +3/0 �- I \ - - o /: %\ 74 i w \ \ co / ,, 0 129 I 4z1.00 GAR ✓ \ _ 14+5 w i P 38orww mm w / LOT 404.33 BSM 1/0 41 416.67 GAR 4z1.67 FFE I/ \ \ ° -� �k _i"W //L 74A / / H m m W 9 / 414 33 4 k YD 4B ` co co �.W W\w w w w , zBw / / 126 0\ '\ 41 FFE I - 4 6}BSM I /� \6�° 69 14+pO _ YD4C / / s N \ _ w w w w o BSMT 68 ry N YD 4A 0i-4y / W 0- a W I w wl r I \ o a 0 0 374 - W13+5� 74B or Ln Lu vi 39 w --- oa I1 w w W 388BW / -./ s s ..r-, '.. W W / +p0o w +N YD 4 r r 4 ROPOSED DRAINAGE SYSTEM / LOT 378 13 W / \ 7z BG w w w w w�3\ I II W /37o BW 413.00 GAR' o 1z 5 ! 76$ /76R . % 4 \ ! 7 � + o _ - o.00 FF PROPOSED 1z" HDPE YARD DRAIN SYSTEM w 1 386/ 413.67 FFE 1% 6zA `o +oo w k�..:r,..< "- % - .. - \ 3 •• , G \19 _L. T---- I w/ 1oi PRIVATE DRAINAGE EASEMENT r;--- \ 8oBG 403.67 BSMT 10+00 10+ 0 11+00 ,11+So- 0 1z _--- - -- AS i \ - D I I �,- - w I \w 78Bw 6o i_ + - ' 1- MARC�L B ICROAD 6 - \ / '° 1 % I w j w w I�(�� LOT \ 7 -I'_ - - -w " OPOS PU i r 68 (\ \\ \ : i/ � °,�' I / \ 94� i 43933 GA 97 I 6oB - r PR - PROPOSED 8 HDPE ROOF DRAIN SYSTEM wl 4�,8 o FF / 88 BG - (D (D r4 w w w 38oT 386 Bw 12 _ _ - _ - s o \ \- 10' PRIVATE DRAINAGE EASEMENT N .I i/ H N N �' W w w w 3746 5 6oA 61 LOT 437''167GAR r'i, o/ I + ; -- LOT } I r4 a _ G W 1 373Tw 3 zgw\ 9� _ f _ I 43 33 FFE-- W BG \ 9 r k 3 - _ 66 �� I YD- z8 N✓ 3 yl4o.ozi G R� I I .,°, � N� .�, Tw pN W r 3i3BG 6aBw r. N� 6 / 110 1 POSED SWM CONSE I I 37 II 'r o _ PROPOSED DRAINAGE SYSTEM I d w w w 88 TW 1, r T W PROPOSED PUBLIC °., / /' 1 1 I LOT I W I OPEN SPACE EASEMENT WALL WALOF \ 38z BG 'Ov DRAINAGE EASEMENT I 3 1 40: I I I � .LOT WALLG 8oBw o6 G R95 �, YD4D I [ + 64 P oo GAR I 1 W 1 I srA.l+zg nL � o ° / � - -. \ o, PRO 111 439� r, OSED PUBLIC I I LOT 439 67 FFE 1/q o - I II \\, 1 +1 1 37B L' \ ��\\ \ /f LOT \ t LOT DRAIio.000AR'MENT I I 109 4z9.8365N1T 1 4 ., 1 t 372B \ 12 414 0 GSA 122 � 6 FFE PROPOSED 8"HDPE 4 / / 1 37 W \ 1 6 FFE li ilii I /0 7I ROOF DRAIN SYSTEM w/ o \ \ � nii 1 1 -' + 41.33GA 94 I 403.67 BSM / � � - - -�r ¢ q _ _ _ - 1 I �° N.. _ ., r- L - I I - � w � � 4zo.67 FFE �L9 %'� 64A - - 10' PRIVATE DRAINAGE EASEMENT PROPOSED WALLS �u 368 BG e o a I 4 33 8 - - 439.67 GAR I % Il I ti o Q c A \ / / / 8/0� I i, Au ii L - I (MAX. HT.=6') ��i 66ew� w�� V A \ I i / ���� �� I ?ai II i '-� 4�0.33BSMT�' "I i -� { LOT 44o,33FFE 4 V I \1- 4 PROPOSED PUBLIC - - - S I 1o8 430.5o BSMT 1 J , n I II ...1 LOT m 3676G V �� \ i � I S '� ROPOSED DRAINAGE SYSTEM -' 1 aoGAR� I ppI I ei 365 6 ��m A A \ i START F ryi5.67 FFE / I I 64p 64C YD 5A 1 4z.00 G R 93 ��� N - DRAINAGE &SWM WALL o 6 BSMT ACCESS EASEMENT 0 64B LOT I 1 4 I % 4z.67 FF 1 li 3 . m w-�ai c z ✓ +oo / �* 5 7 /%21. 441.0o GAR 4 I 3 1 YD 4E s 1„ .. iiiTi_ �! .�STh� o , 112 ! I i.6 FFE Q main c V A� i / 3 �� - li /,. S II 44 7 I I 4333 GA LOT II I 1 0 li ( 1.1 VPEiuT_ �9 38g TW �. 386BG 389T/ / 12 / / 5, / I I{ I I LOT 43i,83 BSMT', - +' a 58B: / LOT i _ 1 �/u 44 92 Q ;( � ' o 0o FF II I 1 � SPACE �R��d GL�3g3g .384 BW \4� / -,iTi= 121 --i 14 :00GA I I 1-07LLP 397TW"�•. I % 2.6 FE __ w s 16G� 397 BG �_ 1 ROPOSED DRAINAGE SYSTEM L I I ILA 39 oF ER o I �, N 1_ Z u N Q wa'.,' R� 8 BW 395 Rio I�OPOSED PUBLIC 422.67 8/0, I I I E BW / 1 PR PROPOSED SWM FACILITY & \ � � � .F` 9 � A. a+z � o l � i' _,.. - ALL Cz \ 7 / ACCESS EASEMENT-BSMT MAINTENANCE EASEMENT \ w 367 BG \ o - 5 / w \ \ STA. RAINAGE &SWM 4 7 \ 0 3 - 4oz BW / O �-. �, .. ` \ -' � 65 BW 3TW i �'404 BG . - ' � �✓ / \ I J E I .-- - - / -. I .:: / { I � w. N LL 1 4 \ V I 0 BG 381 BG - _ / ii 57 m=' WALL ClC1 � 1 �' _ � I � I I I ROPOSED 1z" HDPE YARD DRAIN SYSTEM I I 7 Lo: LOT. I I - I I I Q3a Q J 368 BW 397 Tw - w_ 3 4z z4.00 (,AR I w/ 10' PRIVATE DRAINAGE EASEMENT ^ ° GA 3 / STA. no I' ¢ /0 4433 g 1 4 0 2 O 1 373TW 3 1TW 3 BW 394BG / 410 TW �( ° I ti - I' I I -- 9. 1 I to - , 1 / BG 375 B ;STW 39z BW 4oy'f/W Soo /� 410 BG 2 .6 GA \ _'T bz4.67 FFE I I I I I L LOT I "°'. �u.r�� �- 45.00 FF _ ,. ��+ a EXISTING ioo-Y-R FLOODPLAIN I 400 BG i 4 4 7 0 / I K 373 / k (TYP.) 371 ,BW 3 3 B 3a9 BG 8 BW i/ ,4oa Bw LO FFE 1 4z3 1 I m /.. 106 743� . .67 GAR I �. o- Z`V �, i .. h N f w Z Z O ` S A a1 39 5 33 ¢ w w w T ALL G ---koy V 410 BG /� -o .FFE /^ a N J: � . ' a �, a 1 3.. J \ , WALL �"^ 378 BG W 398 BG , / 4166G O 415. B / __\ ' �O 9/0 LOT II II 33 I. ILOT �J LL Q ✓ - , i .So BSMT. _¢ o_ � i o� 45 67 GA i _PROP0 EDDRY \ TP. o+ o 06Bw / 3 I 16FF 90 PROPOSED 8"HDPE ROOF DRAIN SYSTEM w/ > a,11i ° � w \ TbF oTw \ �o \ / /C/v I I YD-5B IDw 1o'PRIVATEDRAINAGEEASEMENT I Q CO DETENTION \ / / - - - °a WALLE - // 4o6 BG b`�� \ . �J _ _ - = LOT/ i iU \-.�- 3 LLI W iil' ' 4o4 3W 'ti i z9/o v. z _ BASH 'A w ' \�6 \ \ ! wALL F A. o+o � / / �. 447 67 G ¢10- 0 4 d 1 I EL9 -j XISTING MANAGED \ STA.o+oo "n - -- -- T j I Q h <v4� o - 105 44 33 Ff I 48 ;oo GA I ~ a ARTO 404 W // \�ti \ Cip o T PROPOSE I 4 a ✓° 9 I / / T� Z STEEP SLOPES (TYP.) \ \ o0 6G -� \ Q Q / S LOT I D 8" HDPE ROOF DRAIN SYSTEM w/ T I I 67 FF I h I O z LOT / 3 \ l �� W 4 10 PRIVATE DRAINAGE EASEMENT 3 i EXISTING STREAM (TYP. " 398 BW / _- ! 13.n -� 4 I I 448 G R °n LOT 1 � 11g / I I I 81.33 h / C6 ry 7 r /�- \ LOT I FUTURE PUBLIC GREENWAYTO BE � z � / ° �. � \ z .6 GA Q DEDICATED TO ALBEMARLE COUNTY w w.�� v / ° 7 I 44 .00 FFE - V i /� i' M N AT TIME OF FINAL SUBDIVISION PLAT, PROPOSED SWM ACCESS PATH / 4z6 0o FFE 7% 4z6.33 FFE I I I 1O4 43 .17 BSM;T� I II PROPOSED 1z"HDPE YARD DRAIN SYSTEM I PER PROFFER #z OF ZMA2o1800011�, v PROPOSED WALL I 416.00 BSMTI / - - I I �/o / _ w/ 10' PRIVATE DRAINAGE EASEMENT U06 GEO-GRID SYSTEM zoTW °loi - - I LQT I o6 BG '_ �' h �� - I GAR - /0 49.0o GA L 3 - - _ A\ 4°4 I 4 I B O I 8 H c oo BG 4 -- - x - - �� - _ I I 449. 7 I .. � s , . 49.67 FF 7 �I w / � Z 398 Bw, I H04 BW _ - - - titi -- - _ LOT 450, 3 FFE, 14o I I L .� � %� PROPOSED SWM & 4o4TW o o _ N 4z5.o I 8BG 440 So B5; I I o° I / / LLI FOREST •, /( � I 103MT I j OPEN SPACE EASEMENT - / __ 39 _ - - �\ u </ 3F 96 BW c " _ o o' of ' I oo FFE 86 YD 4G 7 33 I I I < PROJECT BOUNDARY TYP. GAR V 1'- - I I" ( ) 4z6.67 FFE . '. � /g% / // ` � � YD-SC � _- - - L :' ry .1 3 � 6 5 .00 GA ;, � / PROPOSED UNDERGROUND V PROPOSED WALL \ z�j LOT �6- l I 1.6 FF j M DETENTION SYSTEM'A' (MAX. HT. = 6') 1 \ \ 416.67 BSMT \ \ / 5 /. - _ _ / �.. 7 L$ T l I / / LLLI W o w VA A \ / __� I I 5 LI / o s __ s 1 T PROPOSED PUBLIC DRAINAGE? V A 1�g/ n :. PROPOSED 12" HDPE YARD DRAIN SYSTEM / LOT I / �3 I I �z \ � z !y�100064 T EEAASEMENT & SWM ACCESS EASEMENT 102 445167FFE o W /z/o 8%i<JPROPERTY BOUNDARY JYF.) A\4o8TW osrw 6.o A�� y� A / / 44.83B51�1T h 3 ;, _ _ ry 13 2 4oz BW 402 6G 4z F'FE� a\\\ ; 427.0o GAR LOT v / I 1 I 4 5 .00 G LOT / J ILu - �; 4o4TW \ yooBw 6:67BSMT� / 4 398 6G s\ 06TW / i A 4z7.67 FFE 116 j /l LOT 451.67 GAR / 1 4 1.67 FF $4 / O l 400 BG ` / i �4 A z6 / / 101 45233 FFE�1.67 GA 402 J Q p A 396 BW 39 TW ! 9 10 398 BW / 1Q1T 4 _. i4 / / 4 zo I / ' I I 408 41zTWzz PROPOSED WALL �400-FWLOT16 GA PROPOSED 8"HDPE ROOF DRAIN SYSTEM w/ o 0 OPEN 39sBG/ aoa6G / 45 (MAX. HT. 6') - 406.67 B 45233E ' SA 7 GA 10' PRIVATE DRAINAGE EASEMENT i' �' N 0 SPACE ��9 - - - - YD- D f o l oo°v 45 �'33 FF b : 3 . I z 6 B W - 00 START OF.. 4y0"� 5 44P.5 $ / + _ 3 LOT i -1. WALL Cz 398 TW398 6 s ARroF \ i �30 PROPOSED 8" HDPE ROOF DRAIN SYSTEM w/ " . 4 82 45 Q I w 0000, EXISTING PRESERVED 5T +oo ,39667BW WALLCi 1o'PRIVATEDRAINAGE EASEMENT ` 1 / L / F �__ yob TW I /( f LOT / z E FTEEP SLOPES (TYP.)BW 44o8 TWo8 BG o �k I 2.33 FLOT / YL pw - 3 -o8 TW 41z TW 99 pA / --_4oz BG 4o6 BG ..4o6.67BW LI44 .BSw1T �6 / / 81 �/ 1 /%r GRAPHIC SCALE a M oo.67 BW 404.67 BW -- 410 TW' I-/ • '._ I, o / !/ 3. / JOB NO. ..PROPOSED WALL yobBG I67GA / / � \ 41oTW 06.67e PEN l I °£ 3 z.33FF LOT' f n ✓ o - �5 3. 6o 182150 MAINTENANCE EASEMENT 04 BG i 402.67BW SPACE / �� 0 /' � l l� �I O • 26 SCALE S NOTE: NO PROPOSED GRADES SHALL EXCEED 2:1 SLOPE. s I 4% gi.00 �A / h z6A 7 „_ , %.S /, Y I ; I v- ( IN FEET) / / 1 =30 1.67FF LOT I I °° 1 / f inch = 30 ft. / NOTE: SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NATIVE - \ LOT I / 49 I / / z \ I SHEET NO. STEEP SLOPE MIX WITH ANNUAL RYEGRASS BY ERNST CONSERVATION_ _ -- - - _ 45 / �/ 3 \ ,VED _ 44 vP.) SEEDS AT A RATE OF 6o LBS. PER ACRE, OR 1 LB. PER 1,0oo SF. / L 13 __ MATCHLINE -SEE SHEET Zz o.oOG k / " ��� .� � '