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Home My WebLink AboutWPO201800051 Plan - As-built 2022-08-18CONTACT INFORMATION REFERENCES ♦ BOUNDARY & TOPOGRAPHIC/ALTA SURVEY "ALTA/ACSM LAND TITLE SURVEY OF THE PROPERTY OF BRASS, INC." PREPARED BY: ROUDABUSH GALE PROJECT NUMBER: V152000 DATED: OCTOBER 18,2016 (LAST FIELD VERIFIED JUNE 11, 2018) CODE OF DEVELOPMENT: PREPARED BY: COLLINS ENGINEERING ZMA201500007 DATED: JUNE 15, 2015 (REVISED OCTOBER 13, 2016) (APPROVED NOVEMBER 9, 2016) ♦ SPECIAL USE PERMIT: SP201500025 ♦ ROUTE 29 IMPROVEMENT PLANS: "PLAN AND PROFILE OF PROPOSED STATE HIGHWAY" PREPARED BY VIRGINIA DEPARTMENT OF TRANSPORTATION PROJECT NUMBER: 0029-002-135 DATED: 10/2212015 ♦ VIRGINIA STORMWATER MANAGEMENT REPORT WP0201700027 "BROOKHILL STORMWATER MASTER PLAN & OVERLOT GRADING PLAN" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 03/14/2017 (REVISED 10/25/2017) (APPROVED 11/07/2017) ♦ VIRGINIA STORMWATER MANAGEMENT PLAN WP0201700037 "BROOKHILL SECTION 1, BLOCK 4A AND BLOCK 8A, ZMA2017-007 BROOKHILL" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 09/27/2017 ♦ROAD IMPROVEMENT PLAN "STATE ROUTE 643 POLO GROUNDS ROAD AND BROOKHILL SECTION 1 BLOCK 4A" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 10/2612017 ♦ VIRGINIA STORMWATER MANAGEMENT PLAN WP0201800013 "ROAD IMPROVEMENT PLAN - PHASE I; STATE ROUTE 643 POLO GROUNDS ROAD AND BROOKHILL SECTION 1" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 12/15/2017 GOVERNING AGENCIES ♦ COUNTY OF ALBEMARLE DEPARTMENT OF COMMUNITY DEVELOPMENT CHARLOTTESVILLE, VA 22902 TEL: (434) 296-5832 FAX: (434) 9724126 ♦ ALBEMARLE COUNTY SERVICE AUTHORITY 168 SPOTNAP ROAD CHARLOTTESVILLE, VA 22911 TEL: (434) 977-4511 FAX: (434) 979-0698 ♦ VDOT CHARLOTTESVILLE RESIDENCY 701 VDOT WAY CHARLOTTESVILLE, VA 22911 TEL: (434) 293-0011 BROOKHILL BLOCKS 4A AND 46 APARTMENTS VIRGINIA STORMWATER MANAGEMENT PLAN WP0201800051 -AMENDMENT 1 TAX MAP PARCELS 04600-00-00-001800 04600-00-00-0018AO IL USTITIIIITOXITWIT1111 �!I1I11 04600-00-00-019AO 04600-00-00-019131 04600-00-00-019133 LOCATION OF SITE ROUTE 29 (SEMINOLE TRAIL ROAD) AND STATE ROUTE 643 (POLO GROUNDS ROAD) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA N LOCATION MAP COPYRIGHT ADC THE MAP PEOPLE PERMIT USE NO. 20602153-5 SCALE: 1"=2000' ♦ OWNER: ♦ APPLICANT: HAUGH, CHARLES R & E. J. RIVERBEND MANAGEMENT OLGESBY JR (TRUSTEES) 321 EAST MAIN STREET, SUITE 201 435 PARK ST. CHARLOTTESVILLE, VA 22902 CHARLOTTESVILLE VA, 22901 (434)245-4932 CONTACT: ALAN TAYLOR PREPARED BY 41, 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540) 349-0321 www.BohlerEngineering.com SHEETINDEX SHEET TITLE SHEET NUMBER COVER SHEET C-100 GENERAL NOTES C-101 - C-102 APPROVED PROFFERS C-103-C-104 APPROVED ZONING MAP AMENDMENT PLAN C-105 OVERALL BUFFER EXHIBIT C-106 OVERALL KEY SHEET C-107 EROSION & SEDIMENT CONTROL PLAN PHASE IA C-200A- C-201A EROSION & SEDIMENT CONTROL PLAN PHASE IB C-200B - C-201 B EROSION & SEDIMENT CONTROL PLAN PHASE II C-202 - C-203 EROSION & SEDIMENT CONTROL NOTES C-204 EROSION & SEDIMENT CONTROL DETAILS C-205 SEDIMENT TRAP AND BASIN DETAILS C-206 STORMWATER COMPLIANCE SHEET C-900 - C-904 STORMWATER COMPUTATIONS AND DETAILS C-905 POND 4B DETAILS C-906 LEVEL SPREADER DETAILS C-907 POND 4A DETAILS C-908 - C-909 WPO AS BUILT PLAN BROOKHILL BLOCK 4A AND 4B APARTMENTS 7/26/22 BASED ON FILE PREPARED BY ROUDABUSH, GALE AND ASSOCIATES: "BH BLK 4A B SWM AS BUILT-03302021 AND ACAD2018-BH BLK 4A SWM AS BUILT-06162021 FOR EXPORT" AND "ACAD2018-BROOKHILL LEVEL SPREADER AS -BUILT 20210707/1 UTILITY SHEETS SHOWING EASEMENTS ADDED TO AS BUILT PLAN (C-501 AND C-502) APPROVED by the Albemarle County Community Development Department Date 8/18/22 File WP0201800051 w CO Of w - tz > p FO w w ~ 4 U Z Z O °da z"I��0LL ,o 02z F: € O� oN�a < Z ax QOQ J K U Q F M❑ So ~ ��♦ BE BE 00 UJ �R9 Z F J � W W ? Q❑ za z ao.gzQ O w U= yC')Z C'l z cn yKZW 0Q2C7 0 z ww � p, �2�K a ADO atwo D:K�w w v�U' W> > W OOW W O� Qwx m�xxz_ z = Z�H �mKmm ZU BCD, ♦****** � O w U 2 d 00 Y p �N y X a s 3o wy W Z2zy= ZS2X0 �23 z Wzzoo Ww w cv awoyy�❑ _ CDw m3a,333g o `\ Zp nz mzz zd o >w aI �m ♦��♦♦ �z oN 5� REVISIONS REV DATE COMMENT BY 1 9/24/18 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENTI COUNTY COMMENTS RTY 5 6/19/19 AMENDMENTI COUNTY COMMENTS RTY 6 4/20121 AS -BUILT PLAN RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION PROJECT No.: V152000 DRAWN BY: EEN CHECKED BY: RTY DATE: 4/8/2019 SCALE: AS NOTED CAD I.D.: SD1 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR BROOKHILL BLOCKS 4A AND 4B APARTMENTS- AMENDMENT1 LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA 0000� "� IE Fd G II N lE 1E 1& II N G BLACKWELL PARK LANE, SUITE WARRENTON, VIRGINIA 20186 Phone: (540)349-4500 Fax (540)349-0321 In !F` i O Z V R NYA R a .p Lic. No. 0402056625 6/19/19�� SHEET TITLE: COVER SHEET SHEET NUMBER: C-100 SETS\SECTION 1\13LOCK 4A AND 4B - FINAL SITE PLAN\WPO- BLOCK 4A AND 4BWS-BUILT PIAN\V152000SD1 DWG PRINTED BY: ABEDIR 7 20 21 ® 11 52 AM LAST SAVED BY ABEDIR CONTACT: RYAN T. YAUGER, P.E. yp c SLOPE LEGEND PRESERVED SLOPES MANAGED SLOPES LEGEND: 0 LIMITS OF DISTURBANCE SSF -- SUPER SILT FENCE SSF XX 0 PAVED WASH RACK CE ® CE [305 SILT FENCE SF [307 STORM DRAIN INLET PROTECTION IP .08 CULVERT INLET PROTECTION 3N CIP 3.09 TEMPORARY DIVERSION DIKE DD �� [314 TEMPORARY SEDIMENT BASIN SB [318 OUTLET PROTECTION OP [331 TEMPORARY SEEDING TS TS W / Ir / i r i i rr I( � 1 I I - - a5D - --------------------------------------- ---------------------------------------- -------------------------------------------- \ Area currently under construction, and final road condition shown with VSMP plan under separate cover 1 I ♦` I I ♦ ` I I I I I I I I I I I I I ♦ 1 I I I 1 I I I I I 1 - 1-------------- I I 1 i I I , ff DA:�0.09 AC _A PROP. MULTIFAMILY SWALE APARTMENTS RY a64A 4STOX RY 60' MAX _ PROP. HEIGHT r - r (BUILDING TYPE IF) 9s6 FF = 458.50 " CONSTRU( d R CE 4 60' MAX PROP.. HEI HEIG / (BUILDINGTYP 'D') STM. B DA: 0.13 / I I I - 0.90 S L is!I/ L 7�.4 58�47 1 '45 .54 c 8.3-71, 4'67.8 748 k4r7,65'" � 4576 / 457;,q 45 7. 5 57 55 45 4T /� 11T• I/ 11 �1 IP ODA: 0.62 AC 8 C=0.78 4 0.� 04 DA: 0.07 AC C=0.75 4 44 457.0,4 Sr. ROW - STELLA LANE IE N W W W NAY PROP. PUBLIC ROW I (SEE SHEET C-301 NOTE 4) i- X�I•�X - Xa PROP. WALLBJ _----456 --- TO STM. 1311 DA: 0.23 AC C=0.90 x i f 4 6.70 / , I I / 457r11/ 4bE 5� 9 7.0 1 I , 5 4. '----45 - "♦r Cks,\ is / / C50 \ W STM C71 II / 3 II SAN ; -w w wow lJ J w w' S SI PI ECG L ®IP PROP. MULTIFAMILY APARTMENTS III 4 STORY (III 60' MAX PROP. HEIGHT (BUILDING TYPE'A') FFE=456.75 f0 STM. B20 DA: 0.27 A i / 3 / c W ' / SF POP. AL 3 Z G i PS ' I�1 , 'P I TO SF I'xil I- CAI , ul� 3 TO STM. Al P P. WA L DA: 0.12 AC ; '�' C=0.90 rKU � WALL E_I PROP. ULTI g - W APP THE �I ( 4 TOR MA -ZPRO . HE (BUILD IGT 3 / FF 456 FS SF , OP UBLIC PROP. PUB R if LL (S E EET C- 0 = ((SEE SH� C-301 NOTE TO STM. A2 TE4>X,I 1 I 1 ` DA: 0.38 AC C=0.90 x so 1 Wes,. ! ri/I✓ ' I FF is BF=456.50 _ ., ... 6.12 \� S �`, _ AP4 STORYTS - - B6 V - __ -----------y.�z�____ - 61 i PROP. HEIGHT \` 454 PROP. WALLr . 3.32 PERMANENT SEEDING PS PS , \ \ \ , , , , ,� J\ TO STM. B5 1 (BUILDING TYPE 0 `\ \ '1 ' - - - STM /• 454.0 FF=454.25 I I 453 4 53 �8 - TO STM ' DLI - B,B DA: 1.10 AC TO STM. B19 x MENT ` \ a (y. ♦ \` R P. STRING LIGHT -_ - _ DA: 0.31 P. C=0.70 D$r(TYP.) 454 2 DA: 0.31 AC ERNST STEEP SLOPE GRASS MIX O ; ; \ ` `\ �+ �+ t\ �\ `\ ` j ', \ \ S .` \ W \ - (2:1 SLOPES) 1 PROF TO STM. B12 C=0.90 O C + 1 1 `, +, \ ♦J `I •.I ' _ --- 1 , ■ DA: 1 .30 -- \' ;1 TO STM. B18 46 3.39 DUST CONTROL DC DC DA: 0.14 An _ _ 4 6.0'� ` \`+ 1 �® Im C-0.65 _"_-- I I \` \` 11 1 1 \ ®` I / C=0. 90 5>,94 \ \ ` ; 1 11 ■ ■ 53.42 \ NOTE: ; , \ - - - $F II 3 1\ 1 1 \ \ ` ' 1 1 1 1 ' ' N J ` \ ` ' I �' '' ' ' ' , 1 1 + ' 1 1 1 , 1 '1 I / `\ `♦ ` R -_ ` `` ` ` tly Tq (gyp , h �I 1 1 1 ', `, 1 1 + \ ' ` p `O ` ' '`F 5 J 4 5 2. 9'' - - 1. PLEASE REFER TO THE FINAL SITE PLAN (SDP2018-00050 FOR THE DITCH 1 I 1 1 1 1 _ +n + �.I 4 45 .5 4 / l ` 1 , 1 1 I 1 1 1 I t 1 -, P h 453. J- COMPUTATIONS ASSOCIATED WITH THE LEVEL SPREADER SWALE SH)WN. , , , , 1 1 1 1 1 ;' ( �`�}m1 q°2 lr C� 5 ; 4 4 5 452�3" 52�.(Cyq,(�'� II 1 ' 1 1 1 1, . ` �� I ;' /' ✓3. 4/ 27 IP 'tJ3 y7 i•• 44.2 15 - ' 111 I { �; I ''1 I ``, •\ \ I % ti T ;' ,4 ,4.T2-'' a54 Iso 1 I 1 • ` ` "� PROP.4 i 'I 111 ; 1 I � \I `` ; ' a � 1. ' 4 41 � 62 / • /�iKETP�CIRCL�� / PROP. LIGHT (' 453. 86' - 1_ 5.0 B3 4 1 POLE(TYP.) 04 I 455.0 �, .♦(rA,`` ,yYJ,` I , \ m , ; � � z:, / � / .79 54.90 � '1 TRASH 455 11 0 asa 03 1' a PACTOR { y' 456 \ , , I PROP. MULTIFA Y APARTMENT 4 STORY 60' MAX PROP. HEIGH (BUILDING TYPE ') / ..•r2a� ■ PA 71 / i i i • � � � Is mnrma •�� a .I . . � ►�i7 . •. . v�r 1 PROP. V\'ALL D- I� 460 PROP. PS I PROP. 466 `\ PS (WALLA LAS ' i i ; ', l' i / i i i i �$$EM�I`f / - ____ _ ________ i -- -- - RIP= AP -- � � v P6 ' i ' �� ♦�` ` . TO EX. C81 % I , , 1 ✓ / / / / / , , / / _ -------_ __-- _ _ __ - _ v�i vim' ` ` \ � - ----_=___ DA: 0.22 P / r l i l/' ' r / l 1 P C OSS Al I I I \� ' S/ - ` �\ \` \ �` C=0.30 I / ii t Pi I I I I `\ 1 \ FH I IP ' ', ( 1 I II AS sror, 4/N _ I ' ' I _________ _ 468 __________ __ \) 432.0 SF I ' I -- ------ -- --- -_ --- - ---- _-- -- - ---' - 1 `. 01 F _-- 466 __ _ _-� _ - / 4G4--------------- _ _ - �,, `II ; 111-PR' FENCE / _ i ' '-- \--463__�___ �___ " _ _ _ _� I I__ - MONUMENT FOUND --- _ '\ , I MONUMENT FOUND) J 0� ' I - ------------ - -- --- -- - OP 6B - S ---'' \I i--- \ - - - - - --- -� - - ----- _----------------------------- _----------- - -- ----------------------------------------------- - W W 456 , ,- -- MONUMENT FOUND ___ 454 -------- - - ' ---------------------------------------- - - ----------- - - - - - - - w -� W W 454 W - _ - W i - W ------------w w W - -- --- 2g SEMI N OLE _ _- w W U.S. ROUTE _----- ----- - --- w W- w- - - -- w TR A rs --- ----- - - - ----- ------------------------- - - - 372 P 552 H.W.P.B. l P. 254 ---- ' y- 159 D B D.B. 270 P. --'" _ / 3 - - - - - - - -------------------- w wTW w R W N F ~> Ud' U Q� W W Z ❑ €€w ~ 3 z N Zw (7 JO,i w Kuz O x0Q"-u Cw QJ ~ Q m ¢ m F wsza�g Wof a=gaoa � (Ld' KU QFm ❑ F® N N o woZ S= W aK ZJH W ❑ i Z Q❑ ZQ g aax gzQ Fj c� Z N z 0 C Z ,- F{ Z�v -wm -mpg o J(D> H 8 0Wxa< g5 k� Z¢w 0 oOww¢ O xm O ZZN ( Wxmmzo O Q 2� 2 J❑� Z U g U W O W Q O O W m Z J N K m m Z U ❑ oQF •��♦ N < of U> &� >�a 0 �N ~ Q in QD zS�xYWa o Cl) W (7 Kx mJ U W F Z Z 001111115 Zo Qwo>,Wo S_ �qt W� aw Owwwx �w >m �Zm zzzm N Z m M H Z Vl J V1 REVISIONS REV DATE COMMENT BY 1 9/24/18 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENT( COUNTY COMMENTS RTY 5 6/19/19 AMENDMENT( COUNTY COMMENTS RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. His free. His the law. NOT APPROVED FOR I CONSTRUCTION PROJECT NO.: V152000 DRAWN BY: EEN CHECKED BY: RTY DATE: 4/8/2019 SCALE: 1"=40' IILY CAD I.D.: OB1 I _ MONUMENT_ FOUND \ PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR BROOKHILL LOCKS 4A AND 4 APARTMENTS - AMENDMENT 1 LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA 11 B00LIEJR H N G I N E E R I N G 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540)349-0321 VA@BohlerEng.com • LT. Lic. No. 0402056625 l� 6119/19 A SHEET TITLE: EROSION & SEDIMENT CONTROL PLAN - - - - PHASE II - - SHEET NUMBER: C 202 _-' 40 20 10 0 40 1 "= 40' C:IPROGRAMDATAIBOHlER12O3 3D2UZY MP PUBLISFL_U %VlUOWOB DWG PRINTED BY GHILI Ni 721MQ 925 MI TBAVEO BY: GHILL NGAB SLOPE LEGEND PRESERVED SLOPES MANAGED SLOPES LEGEND: LIMITS OF DISTURBANCE SSF -- SUPER SILT FENCE SSF XX PAVED WASH RACK CE EKI 3.05 SILT FENCE SF 3.07 STORM DRAIN INLET PROTECTION IP 3.08 CULVERT INLET PROTECTION CIP 1309 TEMPORARY DIVERSION DIKE 3.14 TEMPORARY SEDIMENT BASIN SB O 3.18 OUTLET PROTECTION OP 3.31 TEMPORARY SEEDING 3.32 PERMANENT SEEDING PS PS ERNST STEEP SLOPE GRASS MIX - - (2:1 SLOPES) 2•1 _min! m1 min! ----------------- LA zu -= ------ .1 �5�►. t ter. In �qlrd �_� �� uuil'r ®_LA LANE r7�L� I 1 • m IM �/�� •��71,' �7r•� II _ 25 MAX. FRONT SETBACK - T / , 25MAX. FRONT SETBACK n 0 STM. B11 (YS SF TO STM. Al2 l l I DA: 0.23 AC ! z I� DA: 0.12 AC C=0.90 �I ® IP P I� TO STM. Al C=0.90 II z I410 I _ - PROP. MULTIFAMILY I / DA: 0.3 "<52 AP STOR TS x C=0.84 PROP. HEIGHT s (BUILDING TYPE -A-) 5 �4 _ 4F1 FIFE 41 TO STM. Al 55.37 . 56.�0 I I � 455.30 525 456. x-I PwA LB DA: 0.12 AC 452.4 2.15 , i 6.07 ,' N 90 x 454. 4.13 520 Ay J TO STM. B20 IZ WALLE PROP. UL�IFAMILY \-- 454. ST 5 I SF x $ � w AP TMENTS - Ip � IP DA: 0.27 AC 4 TORY a 454. � 55.°j4 MAX ' Q PRO HEIGHT , 65 z (BUILD GTYPE'A, --- -_45 C=0.90 n F 456.00 4 S N 4 .71 ' qa8' 6.1 LL x \ sF ;I n 55 =I _ '1� TO STM. A4 45 �g B14'94 T�z TM rl III DA: 0.32 AC z x - , PROP. FF , , I I I I I I I I I I I i , STY I C42 ti , a EX 20' STORM - EASEMENT W W Ip STM �� a CD IP ---------------- 20' STORM EA``PMENT %� -- , 4> EX. ROW ' EX FB ` , I 4 4� N0.2 '"l,� maw a FF 1 •1 .IIE:� �� 1 1 •1 NNUA 1 - DA0.38 NNUA I� �n �I 1 •1 -_--=i IiiEEEEI,I,ESAN 1\1 41 �U �w ~> w w Z o f €€ ~ Ouz 3 �ij z ZW C7J,y w � J ~ Q m ¢ m a� Jw0zaa�g Q wH dKmQ2F000❑ ® 0 U QFi3m N N wo oz S "Ian a� CD w m za a WE ar aq x gz�g Um ZVI Z U Ka¢- 1� �au`ig Fi J gs W> (=1 Maw =u�ooww¢ �Q ZZ(N 0,=mOF<xFxFF¢ O Q = 2 J Z U g (_DW How Q O O w .., Z JrgK mmZU o QQH ♦��♦ N < of 5 0- �N �� o ¢ a �o z Wza >z Vl U' (D V W O K K U w F z Z 0 0 Z O Q W O Y Y W O 8 > m3~333g 8� wm awowwwx �w >m nzmzzza 1I D Q ....... N Z m z H Z Vl J V1 REVISIONS REV DATE COMMENT BY 1 9/24/18 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENTI COUNTY COMMENTS RTY 5 6/19/19 AMENDMENTI COUNTY COMMENTS RTY 60 ________ _ - \ NOT APPROVED FOR INTRATO CONTRACTOR (--� 6 '-_ 54 7` - ------- --------- ------ --- p5� 99_ - _____ - _ \ CONSTRUCTION TO PROVIDE _ 4 5 _ _ RIGHT-OF-WAY RIGHT-OF-WAY -' - EK FH a - 4 �J 3, _ ------ 6--{k4 -- ' , SF DIVERSION a- 5.45 - -- - .4 52 454.5 � DIVERSION __ _ -_- _ _ - __'-- v1 sF 3 ___ ____ - 4. ENTRANCE AREA ----- _____ _® _ _ ___________ _ - _ .. I _ 49 54 � - _ �- _ TIFA PROJECT No.: 52000 PROP M MILY 45 _ APA ENTS CONSTRUCTION ' CONSTRUCTION I � �' _ �0 -_ _ -- - - - 4 ORY � DRAWN BY: EEN x ENTRANCE AREA AM \ - D BY �� 3 � ----'- - CHECK RTY 454.0 PROP. WALL D- 4 -- ��D ------__ PROP EGHT DATE' 8/2019 _____-__�hq.--- ^ ) IP 454 -- - >- __ _ 452.i3 (BUI FF 2.24 ) Ir 2:1 E ` 4/ 4 - 1_ FF 52.24 _ - SCALE: 1"=40' IP PROPFAMILY ME AMILY _ • 4 _ __ --- _ _-- -- BF 1.50 CAD LD.: UP1 PROP. MULTIFAMILY - STM --- _ _ e - - \ ` L1 -_ S I _ - ® 4 ORY - 4�1_4 TS APARTMENTS I ® _ _ � IP _ - '- ¢-__-- PROP. HEIGHT 4STORYx ] IP j 6 AX - _ _ 4 PROJECT: -- -------- P. HEIGHT I J (BUILD TYPETB') ��w__ TO STM. A9 -- PROP. - sTM VIRGINIA - ROP. WALL FF 55.00 U FITNESS _ Q 14 1 454 (BUILDING TYPE'B') ' x - __ --- TO STM A13 U PS , 454.0 1 FF=454.25 TO STM. B19 DA: 0.31 AC C=0.90 _-------�__ z DA: U.71 BUILDING F = 455.00 4.9 483 p --- - DA: 0.94 ACC C=0.76 --- Z • = TO STM. A7 - , - �s� C=0.68 - DA: 0.32 AC 453.E 5 - - - ` ` 0 TO POND C=0.84 7253.06 \' 1.8 51.00 452.05 4ADA: 0.13 AC 4.1 452.1 451.9 4 2. C=0.90 54.3 54.13 9sz 51.54 e 3 454.0 54.54 452,4 452.1 ; �� 45 GH 4.43 4 41 453.6 53-4-T 452 1.94 - - OLE (r P �_- CRA6(ON CI U `k5 1 PROP. LIGHT 45--4-53.18 - - - - I - - -Irv, / POLE (TYP.) "" 453.3 _ PS . I " '-- 4 44 442 FF=455.00 454.9 _- 454.93 NiPncT 452 soJ 44a z:1 s - _ ----" - E -' ------------ PROP ---------�-.__- ---------- ___ "_� PS 454 4 _ (SE ARC LS 52 MAINTENANCE _ ---- BUILDING ` 45 Q 460 PS _ _ S / _-�- - TO STM. A14 - i - B -DA: 0.14 AC i C=0.90 / ------------------------------------------ ---- - --- , , __ ---- ---- - -- -- --- - - -- - - --- _ - - - --- - ------- MONUMENT � -- ---------- - ------ -------zzz------- _ .� - _ --------- _FOUND __________ ____ _ _ _____ _____ ____________________________--- --------------- _ _ _ _ __ -__--------------------------- -- ------------------ _______ ----- _______--------- _ --- - __' _- - --- --- ---- ------------------ _ -- __ ___ __ __ _ _ '---------------- - ------------_---� --- --MONUMENT -"------------ _ _---- i "- --------- MONUMENT FOUND _ \ -MONUMENT r.c.(.; .'.6.�.-.:;:F_�;, ;J�•i:[:. ;lLr"'s`." I t^'i;"q;<;..;,5:\;f:.n1°`.'::*sl�k. _ _ FOUND -__-__-" - , 1 _______ n _-- ' ',SEX. EW-1 FOUND A� - MODlF7E CIP ,i� 1 ______ µ, �\ �,\ W W�W W W W -_ _'`___ W�-W W W W W ROVTE29SEMO LE W W W W - - = ____-` ------ -- ---- RAIL 'as - - - 3 -- _ _ `, \ 1 1 ., ., ,.,D.B. 220 P. 159 D.B 312 P. 5.52 N.W.P.B. l P. 254 l 45 53.7 03 / TO EX. C81 \ DA: 0.22 IP , C 0.30 I 1 , , , , I , 1 , EX. FN I I 1 - D ENGINEERING 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540)349-0321 VA@BohlerEng.com C:IROGRAMDATA,BOHlER1293AC3D2UZ2 MP PUBLISFL-U %VlUOU B]. PRINTED BY GHILINGAS 721M0925 AM I T BAYED BY: GHILLNGAS I 1 I I I PROPOSED GREENWAY STREAM BUFFER LIN \ I\ 11 I I I I R. VVIDTH 1 SWIM EASEMENT DB: 5121 PG: 644 , I I I I� PERMANENT STORM DRAIN EASEMENT SWM FACILITY EASEMENT 1 rM yp LIMITS OF ISTURBANCE / PROP. MULTIFAMILY / APARTMENTS 4 STORY PROP. FDC 60' MAX / PROP. HEIGHT / (BUILDING TYPE'D') PROP. 2112"1 FF=458.50 FIRE LINE IBF = 447.841 IPROP.2112"y - DOMESTIC \ WATER SERVICE PROP. C ELE C METER.` F ' PROP. 6" HDPE ROOF DRAIN I (TYP.) SAN - ST PROP. 6 S DIP SAN. LAT. 4+ .15 14+50 ' \ PROP. MULTIFAMILY APARTMENTS 4 STORY 60' MAX \ PROP. HEIGHT (BUILDING TYPE V) \ \ FF=45R50 PROP. L ELEC.` METER PROP. FDC-/ / PROP. 45' BEN PROP: \ L- J 4" X 21/2" REDUCER \ 45° BEND \ PROP. 2 l/I \ FIRE LINE / PROP.FENCE 1 VAR. WIDTH SWM EASEMENT / DB: 5224 PG: 192 I / I STM B1 if I PROP. 22' X 25' LILITY .� % CLASS Al _NT RIP -RAP W VAR.WIDTH SWM EASEMENT DB: 5224 PG: 183,192 \ / Li Ag `.. PROP. 6X6' RISE "FENCES_STRUCTURE PROP..: ROOF DRAIN P. ROP (TYP.) FDC PROP .21/2' PROP.21I2' PROP. DOMESTIC WATER FIRE LINE MULTIFAMILY SERVICE APARTMENTS STORY 60' MAX PROP. SPAN. LAT PROP. HEIGHT 16" (BUILDING TYPE'E') (PROP. ELEC. 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MODIFIED)EX EW_ I EW-2 MONUMENT FOUND EX TREE`/NE -1 -- w " If w w - - w_ - - - - - - - - ----------------- W w------W------ R�WSA XE _ - - - - 2 X AN W-WL ------------------------ W W - - - - - - - - _ - - - 12 - W/C DlP - - w---W------ w --- U.S. ROUTE 29 SEMEN®LETRAIL = _ -- - - - w w - - - W w — J " W/C w-------W-- --------------------- _ _ _ - - - - _ _ - EX ABANDONED - ---- SPEED LIMIT 4 M. -____�_______________ _ - - - - - - - - - - - - - - - - - - (VAR/ABLE WIDTH - - - - 12'w/L 3 --- --- - - - - - - - - - 20 P 159 D B 112 P. 552 H..W.P.B. l P. 254 -- - - D B 2 - - w w w - - - - - - - - - - - - - - - - NOTES: 1. SEE SHEET C-503 FOR ROOF DRAIN INFORMATION. 2. DRY UTILITIES SHALL BE COORDINATED DIRECTLY BETWEEN THE CONTRACTOR AND UTILITY COMPANY, AND SHALL NOT BE PLACED WITHIN ANY PROPOSED CONFLICTING EASEMENTS. IF A CONFLICT IS ENCOUNTERED IN THE FIELD, CONTRACTOR SHALL NOTIFY ENGINEER IMMEDIATELY IN WRITING PRIOR TO PROCEEDING FOR DIRECTION AND RESOLUTION. 3. THE PUBLIC INFRASTRUCTURE PROPOSED WITHIN THE ROAD IMPROVEMENT PLAN (SUB-2017-00117) SHALL BE CONSTRUCTED, TESTED, AND ACCEPTED BY THE ALBEMARLE COUNTY SERVICE AUTHORITY PRIOR TO THE ESTABLISHMENT OF WATER/SEWER SERVICE. 4. FOR ALL WATER METERS SHOWN, CONTRACTOR TO INSTALL 4" DIP TO CURB AND INSTALL 4" GATE VALVE, THREADED PLUG AND 2" COPPER BEHIND THE CURB. 5. AN ENCROACHMENT AGREEMENT WILL BE EXECUTED FOR THE PAVER ENCROACHMENT INTO THE ACSA WATERLINE EASEMENT. 40 20 10 0 40 1 "= 40' W U „wF,m z o3 p"' UO Z w C7J OLL aw ,./.F 26k aLLLL CF5 w K Z D. g IE Jox< D'o c7 c4 q�xF-aoa U aF-m❑ Z U. P, H v: aa= 3za �g a ar�i�x Wzz> gQ Ode (rig m� x "sz 9 wows aoow j, r`i � � JmmmZU ti ao 2awy Jw o a & z �Z WZ a So w a� }= LL �C7W wwzzos¢sw� �iG aw000'o y3v~333gawo,wwwx I a1 DzmzzzaIF Q �d LL So A REVISIONS REV DATE COMMENT BY 1 8131118 COUNTY COMMENTS RTY 2 9110118 ARB COMMENTS RTY 3 10/25/18 FOR APPROVAL RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. APPROVED FOR CONSTRUCTION PROJECT No.: V152000 DRAWN BY: MEG CHECKED BY: RTY DATE: 6/8/18 SCALE: 1"=40' CAD I.D.: UPI PROJECT: FINAL SITE ]PLAN FORR TT�� TT�� JL➢RO011vHILL BLOCK 4A AND 4JB APARTMENTS LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540)349-4500 Fax: (540) 349-0321 UTI]LITY PLAN SHEET NUMBER: C-5®1 SETMECTION IIBLOCKMAND 4B FII SITE PUNW1520=U .DM PRINTED BY: DREARDON 1025.18®7:48PNI IASTSAWIDBY:OREARDON EX. 12' AND W/L ^II p II + II STY C71 II II 11 10�1 �1 W STM L4 W W W rv�e7 w w w w S/ C70 --- r 15" R C, II f =-- - _= EX. FH CK \ p II EX 20, ,Sl= T SETBACK \ I PROP. 8" SAN. LAT. EX 20' STORM STELLA LANE EX S" PVC SAN LIMITSOF v SAN DISTURBANCE 16 PROP. PUBLIC ROW (SEE SHEET C-301 NOTE 4) y EX. 12-DIP W/L - A EX.24"RCP=====_= r-7 PROP. 3" DOMESTIC WATER SERVICE I }I II PROP. 4" FIRE LINE T - PROP. FDC E 4) PROP. 4" FIRE LINE PROP. 3" DOMESTIC PROP. FDC l 1 CJJ II - WATER SERVICE PROP. MULTIFAMILY . APARTMENTS 4STORY II M PROPMULTIFAMILY APARTMENTS LREOCP. 60'MAX I 4STORY METER PROP. HEIGHT 60'MAX BUILDING I PROP. HEIGHT FFE-456.75 45° (BUILDING ) BEND I FF=456.00 PRO � I I (SEE NOT II 90I R8" HDPE ROOP. OjDRAIN (TYP. PROP. 6" HDPE z ROOF DRAIN o (TYP.) I N PROP. PUBLIC ROW PROP. PUBLIC ROW 0 �LL (SEE SHEET C-301 (SEE SHEET C-301 z NOTE 4) NOTE 4) N PROP. 32'ACSAT�\ SEW RATER ESMT. I \ 15" 20' STORY EASEMENT SAN 4/ - - FHA o EX STM C06 , a � � 9 " PROP. AND BOOT 9�OQ Q PUBLIC SWIM FACILITY *� EASEMENT DB: 5121 PG: 644 PROP. 5'X5' RISER 31 STRUCTURE • I LIMITS OF DISTURBANCE h 'O' ACSA SANITARY SEWER EASEMENT DB: 5133 PG: 472 DB: 5211 PG: 676 0 + a Im m0 0 a Io 0 SA I > DB: 5133 PG: 472 m 1 -4" GV 4' 21/2'� � oo - N -- SAN "r' DB: 5211 PG: 676 SAN R DUCER -------- _ 5�' * PROP. 8" DIP SAN. + 11+00 7� PROP UJI ----- pIY VARIABLE WIDTH ACSA S gg S PROP. 8" DIP SAN. 3B . 8" DIP SAN. UTILITIES EASEMENT ONNE�LT TO EX.VLA P. 10"X8"X� S S S • S • 10+50 11+00 DB: 5133 PG: 472 ,,, 10+ (SAME SLOP�2 - 8" GVI 1 - 6"�V o 15+ .60 +50 4+00 13+50 -Wi DB: 5211 PG: 676 PROP. 10"Dll+00 ___J 8"DIPWILBi 11+2. 8" X 4" TEEPROP. 8"DIP SAN. V�1-4"GV PROP. 20' ACSA WATER ROP. 6' S 5 EX. BOV REMOVED - - STM 10+50 PROP. CORE 10+00 AND W/L EXTENDED EX. BOV REMOVED a s e . A13 PROP' 8" X 6" TEE I EASEMENT AND B00 _ AND WIL EXTENDED e y 3 I 1 4" GV 1 - 8" G DB: 5133 PG: 472 Nib ILY I P 1/„ l? DB: 5211 PG: 676 I WM VAUL/T (SEI $ a ® m< BEND PROP. HEIGHT 1 TYPE PROP.STM (BUILDINGC')BEND A7 yJL 15"RCP FF=451.50 PROP. MULTIFAMILY • • PROP. MULTIFAMILY APARTMENTS 12" DPE z 15"RCP „X2021 PROP 21/2.BF=441.50 4 STORY LLI STM < FIRE LINE APARTMENTS = _ _ - - _ 4 STORY 60'MAX a IJ F.Tl�.IIATIES BLE WIDTH ACSA A9 o EDUCER J PROP. FDC 60' MAX STM Sc PROP. HEIGHT a ci U EASEMENT J a § 3 • C75 (BUILDING TYPE - - 33 PG: 472 PROP. PROP.W STM PROP. HE GHT + FF=455.00 d U FITNESSo A14(BUILDING TYPE B') o3� 11 PG: 676 ELEC. U e PROP. 6" HDPE \ FF=454.25 II I PROP.21/2' Y a METER BUILDING B W t PROP. FDC ROOF DRAIN f \`-P I DOMESTIC `2m a FF-411,11 co a V ROP. 21/2" Ss WATER SERVICE m o PROP. 4" HDPE PROP 4" es 0 R I FIRE LINE I I PROP. 90° 0 W ROOF DRAIN SAN. LAT. L a -PROP. 1 BEND ��a �� P -PROP. ELEC. U1" LIL METER --PROP. 3 I COPPER METER I Ss II I PROP. 6" o U I - SAN. LAT. PROP. 1 112" PROP. ROP. 6" SAN. LAT. SL ^ SAN D E TIC X 4" TEE I - m + 73 APR .45' PROP. o ROP. FH TER ER ICE DOMESTIC WATER " PRO1 -4" GV SERVICE I T N I Ss PROP. 1P. BEND 45° f R PROP. T HDPE PROP. WATER PROP. 1 Y" O ROOF DRAIN "CORP. STOP METER �� WM VAUL7T ° (TYP.) 1 - 8' GV .6' (SEE (SEE NOTE 4) Ss PROP. 4 'BEN 14+00 PROP. 8" DIP W/L A 14+50 15+00 15+50 NOTE 4) 1I METER PROP. 8" 14" TEE 13+00 PROP. B"X 6" TEEE 1TW WSW W PROP. 1 / —WSW PROP. 8"HDPE I II I 1-8"GV:1-6"GV CRAFTON CIRCLE P. T I ROOF DRAIN °O ROP. EA ACSA WATER (TYP.) I PROP. °° PROP. 3" 75 COPPER PROP. 20'A EASEMENT �ROP. 21/2"I Ss 4'X2112' I s WATER ESMT. DB: 5133 PG: 472 PROP. 2112" ROP. DOMESTIC WATER REDUCER 3 ATER&ETER DB: 5211 PG: 676 SERVICE FIRE LINE R P. OM. II PROP. FDC ATER SERVICE PROP. TRASH / PROP. 31 i. FF=455.00 COMPACTOR /r I I s I PROP (SEE ARCH DE T PIROP.J / MAINTENANCE PRO HDPE ROOFOF DRAIN ELEC. BUILDING II SA I I . — PROP. METER METER —` I� II,II I I I �EX TREELINE I, II II I 'III I I I I I MONUMENT FOUND I EX FH � I � � �' MONUMENT EX. TREELINE MONUMENT FOUND }•.' .`i: ro;:. •ry:, at : '..4f, :,a; cY.i tan )`^" Q'i ^'iT>.:• "tiy e" ; f{;a?I4`3,;•,..#) FOUND — — — — 3'-ri L _, _ MONUMENT FOUND i'FG F : \I :' "Ia'y>'N •"� / 8 EX EW 1 MOD/FIEDJ - -- - -- , • EW-2 a' -------- _ _ , it b w —W — — ------ /_..- 8y �°"<•. _�-- — �- ___ - - - - - - - - - - - W --------------- W W W W w 3 --RWS4 - __-- -W - W W -wW�- MNW — ®LEW TRAIL - W w W - W-- - U.S. ROUTE29 E E-- - - LIMIT 45 MP.H. 24"DIP Ex. 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CLUBHOUSE '•?9 1 -6" GV (SEE NOTE 4 FF=452HO ROp, W�-�y PROP. MULTIFAMILY V COPPER PROP.4 19 0 } PROP. 90°APARTMENTS PROP. PROP' 1 1/2" BEND o-PR P. 45°' SEE BEND 4 STORY 4' X 3" TEE STM DOMESTIC WATER ~ 1 - 3" GV Al2 � SERVICEPROP 4" SL PROP. HEIGHT 111 co y PROP. 45° (BUILDING TYPED-) X 7 PRO . -- 1 �� SAN. LAT. B BF= 438.00 a,45°BEND r r' E :4) STM a ROP. 5 - - -I END OP. SAN o A31 \ 37?"F NO STM 1" GV 8" 72 PROP. FH P.) N N J E A15 l PROP. 6" HDPE REDPUCCEEP U a • ROOF DRAIN "X6'TEE STM STM STM to a' o (TYP.) 1 -6" GV + A10 •A5 A4 3 STM Z 2' 3 I ROP. 1 -6" GV+ 1T R A3.1 O � 6 ll ELEC. - - STM 12" HDPE ¢ N 1 RCP " a � o METER + VARIABLE WIDTH ACSA a ILL a �t A11 3� WATER EASEMENT r'o 5 DB: 5133 PG: 472 - - tb DB: 5211 PG: 676 0 U PROP. 45' a a � PROP. B" BEND - o Ja DIP SAN. a ROP. 20' o C +3. LAT. I ACSA o WATER F PROP.2 112" DOMESTIC 0 ESMT. WATER SERVICE + PROP. PROP.21/2" ROP. 6" 20' ACSA SANITARY X4" TEE II t FIRE LINE SAN. LAT. 0 SEWER EASEMENT 1 - 8" GV 3 Pf), P. I PROP. FDC NOTES: 1. SEE SHEET C-504 FOR ROOF DRAIN INFORMATION. 2. DRY UTILITIES SHALL BE COORDINATED DIRECTLY BETWEEN THE CONTRACTOR AND UTILITY COMPANY, AND SHALL NOT BE PLACED WITHIN ANY PROPOSED CONFLICTING EASEMENTS. IF A CONFLICT IS ENCOUNTERED IN THE FIELD, CONTRACTOR SHALL NOTIFY ENGINEER IMMEDIATELY IN WRITING PRIOR TO PROCEEDING FOR DIRECTION AND RESOLUTION. 3. THE PUBLIC INFRASTRUCTURE PROPOSED WITHIN THE ROAD IMPROVEMENT PLAN (SUB-2017-00117) SHALL BE CONSTRUCTED, TESTED, AND ACCEPTED BY THE ALBEMARLE COUNTY SERVICE AUTHORITY PRIOR TO THE ESTABLISHMENT OF WATER/SEWER SERVICE. 4. FOR ALL WATER METERS SHOWN, CONTRACTOR TO INSTALL 4" DIP TO CURB AND INSTALL 4" GATE VALVE, THREADED PLUG AND 2" COPPER BEHIND THE CURB. 5. AN ENCROACHMENT AGREEMENT WILL BE EXECUTED FOR THE PAVER ENCROACHMENT INTO THE ACSA WATERLINE EASEMENT. 40 20 10 0 40 009, 1 "= 40' W U r U F4 3 s zo W C7J ULL UO ¢w N. F �� aLL LLa K� omgaxF-aoa U aF-m❑ W �=J a0 za S w U (DZ a ar~i3x Wzz> gQ Ode xm,x �m,sz gy OO� z �°mm°Z� ji >aw y I� Jw o ao a & z �Z WZ a W a2 }= LL C7W wc 4G gDo�s�oosr w �og aw �j�I�.a awowwwx I a1 Dzmzzza Q rn d o Q 1116 n REVISIONS REV DATE COMMENT BY 1 8131118 COUNTY COMMENTS RTY 2 9110118 ARB COMMENTS RTY 3 10/25/18 FOR APPROVAL RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. APPROVED FOR CONSTRUCTION PROJECT No.: V152000 DRAWN BY: MEG CHECKED BY: RTY DATE: 6/8/18 SCALE: 1"=40' CAD I.D.: UP2 PROJECT: FINAL SITE ]PLAN FORR TT��llvJTT�� JL➢JCNOOILL BLOCK 4A AND 4JB APARTMENTS LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA i BOHLER 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540)349-4500 Fax: (54111 :i44-0321 UTI]LITY PLAN SHEET NUMBER: C-502 $EBl$ECTIONII MKMMDL FlN MTEP %VI5lOWI1' PRINTEDBY:DREARDON 1025.18®7:QPM IASTSAVEDBY:MR 13014 VA DEQ STORMWATER DESIGN SPECIFICATION NO. 15 EXTENDED DETENTION POND • Implementation of the pondscaping plan and vegetative stabilization • Final inspection (develop a punchlist for facility acceptance) A construction phase inspection checklist for Extended Detention Ponds can be accessed at the CWP website at: htto://www.cm.oro/Resource Library/Controlling Runoff and Discharges/sm.htm (scroll to Tool6: Plan Review, BMP Construction, and Maintenance Checklists) For larger ED ponds, use the expanded construction inspection form provided in Appendix B of CWP (2004). If the ED pond has a permanent pool. then to facilitate maintenance the contractor should measure the actual constructed pond depth at three areas within the permanent pool (forebay, mid -pond and at the riser), and they should mark and geo-reference them on an as -built drawing. This simple data set will enable maintenance inspectors to determine pond sediment deposition rates in order to schedule sediment elcanouts. SECTION 9: MAINTENANCE 9.1. Maintenance Agreements Section 4 VAC 50-60-124 of the regulations specifies the circumstances under which a maintenance agreement to must be executed between the owner and the local program. This section sets forth inspection requirements, compliance procedures if maintenance is neglected. notification of the local program upon transfer of ownership, and right -of -entry for local program personnel. Access to ED ponds should be covered by a drainage easement to allow inspection and maintenance. It is also recommended that the maintenance agreement include a list of qualified contractors that can perform inspection or maintenance services, as well as contact information for owners to gel local or state assistance to solve common nuisance problems, such as mosquito control, geese, invasive plants, vegetative management and beaver removal. The CWP Pond and Welland Maintenance Guidebook (2004) provides some excellent templates of how to respond to these problems. 9.2. Maintenance Inspections Maintenance of ED ponds is driven by annual inspections that evaluate the condition and performance of the pond, including the following: • Measure sediment accumulation levels in forebay. • Monitor the growth of wetlands, trees and shrubs planted. Record the species and their approximate coverage, and note the presence of any invasive plant species. • Inspect the condition of stormw'ater inlets to the pond for material damage, erosion or undercutting. Version 1.8. April 13, 2010 Page 14 of 17 VA DEQ STORMWATER DESIGN SPECIFICATION NO. 15 EXTENDED DETENTION POND • Inspect the banks of upstream and downstream channels for evidence of sloughing, animal burrows, boggy areas, woody growth, or gully erosion that may undermine embankment integrity. • Inspect pond outfall channel for erosion, undercutting, rip -rap displacement, woody growth, etc. • Inspect condition of principal spillway and riser for evidence of spalling, joint failure, leakage, corrosion, etc. • Inspect condition of all trash racks, reverse sloped pipes or dashboard risers for evidence of clogging, leakage, debris accumulation, etc. • Inspect maintenance access to ensure it is free of woody vegetation, and check to see whether valves, manholes and lucks can be opened and operated. • Inspect internal and external side slopes of the pond for evidence of sparse vegetative cover, erosion, or slumping, and make needed repairs immediately. Based on inspection results, specific maintenance tasks will be triggered. Example maintenance inspection checklists for Extended Detention Ponds can be accessed in Appendix C of Chapter 9 f the Virginia S ormwnter Management //andbnnk 2010 or at the CWP webstle at: o b rr ! % ( ) htto://www.cwro.om,Resource Library/Controlling Runoff and Discharges/sm.htm (scroll to Too16: Plan Revicw, BN1P Construction, and Maintenance Checklists) For a more detailed maintenance inspection checklist, see Appendix B in CWP Stormwater fond and Wetland Maintenance Guidebook (2004). 9.3. Common Ongoing Maintenance Issues ED ponds arc pron e In a high clogging risk at the ED low -low orifice. This component of the pond's plumbing should be inspected at least twice a year after initial construction. The constantly changing water levels in ED ponds make it difficult to mow or manage vegetative growth. The bottom of ED ponds often become soggy, and water -loving trees such as willows may take over. The maintenance plan should clearly outline how vegetation in the pond and its buffer will be managed or harvested in the future. Periodic mowing of the stormwater buffer is only required along maintenance rights -of -way and the embankment. The remaining buffer can be managed as a meadow (mowing every other year) or forest. The maintenance plan should schedule a shoreline cleanup at least once a year to remove trash and floatables that tend to accumulate in the forebay, micropool, and on the bottom of ED ponds. Frequent sediment removal from the forebay is essential to maintain the funefion and performance of an ED pond. Maintenance plans should schedule elcanouts every 5 to 7 years, or when inspections indicate that 50% of the forebay capacity has been filled. As noted above, the designer should also check to see whether removed sediments can be spoiled (deposited) on -site or must be hauled away. Sediments excavated from ED ponds are not usually considered toxic or hazardous, and can be safely disposed by either land application or land filling. Version 1.8, April 13, 2010 WQL ORIFICE - POND 4B Page 15 of 17 Drawdown time = 30 hrs WQL VOLUME 34,000 cf WQL WSE 442.25 ft POND INVERT 437.50 ft Maxiumum h 4.75 ft Q avg 0.315 cfs Q max 0.630 cfs A orifice 0.060 ft D orifice 10.276 ft 3.31 inch THIS CALCULATION IS PROVIDED TO SHOW THAT THE 1.90" ORIFICE USE a ern ring rlr•r PROPOSED WILL MEET THE DRAWDOWN TIME REQUIREMENTS BASED ON 1.90" USED THE WQL VOLUME PROPOSED FOR POND 4B. It '1, \ `♦\ `II I i \ `\` `\ `♦ PROPOSED , I `GREEWAY/OPEN, SPACE BUFFER 1 � 1 1 1 \ , ♦ 1 1 It I 1 ` I I ♦ `, III 1`,1 'I '11 i I / ♦♦`, ` \` � ♦` P� , I , I 1 1 It , I It 1 I I I I I I I I 1 \ ' I I I ; I , I I ♦ , , 100 YR WSE=44 . 10YRWSE.44 2YR WSE 44 • i • / l i i / ,/ 1/ ' 1 YR WSE 4 - BOTTOM OF POOL =43- , MICRO POOL ELEV. = 437, I I I I I I I I IL 0 I t-] I- Lr--=2 II � _I j ``� ``- l 1 � a Q♦ 14 ;- ' �`♦ j T 1 G T ,. /-443.3 \ I\ \ I \ \ \ \ \ T � \ \ I \ \ \ \ \ \ I1. 1. / ` 1 \ 11 , 1 \ , , 1 1 \ -1_ , 1 1 1 1 ` \ 1 \ 1 1 1 11 IN WT W I 1 1 I I I I l i t I I I I�I r l I I I I li I I I �i�ITl�ll_ II rll® 1 1 1 \ \ 1 I I I 1 ♦ \ 1 WSE L = 444.38 VSE� 443.76 5E=442.60 E=442.4A : II 11 ; 111 'll II `, `\\ "V /- 'A4 \'\\ '\ YJ 1 I I i 1 'P ik\ „•'I ', I I I, l { I i i ` It Tast. It Tree. it me law. /ytjr) 1 11 ,` \\ \ `, ♦, \ Lam♦ Naq \ _- - I, ! ! 1 ' \J .1 1 I l I I I ` `I I ' N ONI R I I ',/ '` I`, '\ `` `\ ♦`♦ ♦` `` (\`<` Y Y II I I � ' � ,. 1._I ) l I, ; I l , ♦, \\ I � CONSTRUCTION RISER W/ TRASH RACK�s.,l III ' _ i i PROJECT No.: V152000 - --------- ' TOP- 443.75 INV 445.25 ,_______ INV-432.24 ♦`, `, ' )I � I � II � I DRAWN BY: MEG 1W417.7 ;� _ IN-442.92--__-__----- INV-445.20 - - - - - - , -- I , � � CHECKED BY: RTY i /' `♦ B1(V 43'&10 ____--- I _ DATE: 8IH6/2019 i i _ c i� \ I I n - AS NOTED 0.y. T - - I I SCALE' I I I 1 ----OUT-434.57 ,.:. :.-o � _'.: 1 1 I, I 1 , , , ♦ - ''r: :. ,: ."%1'_-; r:'� I l I 1 CAD LD.: SW2 - _____ -- _______________________________- I 1 I `.. �" �� ` ♦ :.: ,. .. .: ", _ 1 I \ PROJECT: �'v' I �`��' �a � i ! VIRGINIAA�tMWATER - �G EXTENDED DETENTION LV-1 DESIGN TABLE MAN NT LAN I le ---------------- ♦ ♦ I / -- -'--- I PROP. 48" TW 434.00 TW 437.7 ` `♦ --11 FENCE --- \ __ - -NWaa4oD_ Bwa3219-'" --- ---- - -- -- ---- --'----------------' / mil ------- --- ----------- -- ----------------- - : --- / I \ ----------- ------------ - ------ --------- „-_ --------------- - ------ TT f ------------------------------------------------------ - -- - - - - w W W- ?5 Ww wF sz �3p 64 'aa � JoFQ�N �i Z¢ K U¢ F H g w �a Z ¢ O Z a O z aa= 3za Q W }ZU KU' Z_ rc �..4 Zww w'a� m � 0 �Zm ��m �>fY �w> am = WWZZ'QJ f■{ NZQW =6mi=2K o 0Zm UFFF J=J00d'Z Q T� `� Zf w�mofYum woZoow Zi >0L oaa a0 m a 8 a � 3 404 Li a If ZJ<j YY'a= Z wZZOOWW c7 Fw0>->- man 333g �� yw nzmzz Zo. N Z - oN � z S� Ir REVISIONS REV DATE COMMENT BY 1 8134118 COUNTY COMMENTS PITY 2 10111/Iffi CGIONRE(I]IMMMtMS PITY 3 IGIM98 FXIIIIIIENUNIFIOUAt PITY 4 ti/20/19 AM T1 COUN PIN 5 !?� WBVIB ��jjMENTS COLNIFYCOl01NMENTS PIN 6 14Yd01920 AAGN2 RTY RIPRAP INLET CHANNEL PROTECTION _ ----------_------------- ------ -141 ----ROND-VOLUME _TOBE'E---R------- -- --CONFIRMED DESIGN -AND -ADEQUATE _IN AS BUILT COND1T10NS'------------- - Pn.. - . elev. 4^ 50 PAVEMENT INV. IN=44 INV.OUT=445.09, INV. IN=445.00•/ GRANULAR ROAD BASE `INV. IN=444.70✓ PAVEMENT BACKFILL 0 PROP. ISOLATOR ROW (10) SC-740 CHAMBERS IIII I j I Ili II I ! j I I IIII it i l j 1 I lu POND 4B TREATMENT VOLUME NOTE: YR 20 10 5 0 20 1 "= 20' THE ORIGINAL VDOT POND, VDOT BASIN #2, WAS SIZED FOR A TREATMENT VOLUME OF 7,151 CF OF STORAGE, WHICH EQUATED TO 1.58 LBSNR OF PHOSPHORUS REMOVAL. THE POND CURRENTLY PROPOSED, POND 4B, REQUIRE AN ADDITIONAL TREATMENT VOLUME OF 15,267 CF BASED ON THE INCREASE OF THE DRAINAGE AREA. THE TOTAL REQUIREMENT FOR TREATMENT VOLUME IS A COMBINED 22,418 CF. SINCE WE ARE PROVIDING 34,000 CF (SHOWN ON THE DESIGN TABLE ABOVE) OF PROPOSED TREATMENT VOLUME, POND 4B IS ADEQUATELY SIZED FOR BOTH THE VDOT EXISTING RUNOFF AND THE ADDITION/ PROPOSED DRAINAGE AREA. BECAUSE THE VDOT PORTION OF THE POND IS TO BE LEFT AS -IS, THE 1.58 LBSNEAR TREATMENT ACHIEVED BY THAT EXISTING VDOT POND WAS NOT USED IN OUR PROPOSED CONDITION. NOTE: 1. CONTRACTOR TO INSTALL AND MAINTAIN ANTI -VORTEX DEVICE ON SEDIMENT BASIN SHOWN UNTIL THE COUNTY INSPECTOR APPROVES THE TRANSITION TO A PERMANENT FACILITY AND RISER STRUCTURE. (SEE SHEET C-205 FOR DETAIL) 2. POND ROUTING TO BE PROVIDED UNDER SEPARATE COVER. .57 EW-2 ENDWALL 3. CONTRACTOR SHALL ADD PROPOSED NAITIVE WETLAND FOREBAY BOTTOM ELEV.=440.00 WSE=437.5 434 - INV. OUT=4345432.24 PLANTINGS TO AQUATIC BENCH AREA THAT HINDERS INV. OUT=432-18 ACCESS TO FOREBAY AND MICRO POOL. WITH1.0%SLOPE TOWARDS 49.28'-48"RCP 439%4.72% FOREBAY SPILLWAY BACK -PITCHED PIPE STABILIZED 10' FOREBAY " SPILLWAY (RIPRAP) CONCRETE CRADLE 10' CL-A1 RIP -RAP ELEV.=444.50 TOP OF BERM 445.80 (OUTFALL PROTECTION) POND 413 PROFILE NOT TO SCALE BMP/MICRO TOP OF DAM Required Provided Tv = [(1.0)(Rv)(A)]/12 - THE VOLUME REDUCED 23,168.48 c.f. - (750 c.f. from Isolator Row) = 34,000 c.f. BY AN UPSTREAM BMP 22,418.48c.f. A MINIMUM OF 15%OF THE Tv IN THE 3362.77 5,600 c.f. PERMANENT POOL (FOREBAY, MICROPOOL) LENGTH OF THE SHORTEST FLOW PATH / 0.64 OVERALL LENGTH = 0.4 OR MORE AVERAGE Tv ED TIME = 24 HOURS OR LESS 30 hr. VERTICAL Tv ED FLUCTUATION EXCEEDS 4 FEET 4.9' TURF COVER ON FLOOR Yes FOREBAY AND MICROPOOL Yes CDA LESS THAN 10 ACRES Yes POND 4B RISER DETAIL NOT TO SCALE 100 YR WSEL=444 38 ---------------2 YR ITH 6" DRAINAGE ITH SOLID PLATE RATION BE COVERED RACTOR TO DRILL V=437.50 WHEN BMP/MICRO POOL 437.50 STABILIZATION E 4.72%to- 10 YR WSE = 443.76 - --------- - - - W E=44 E=442 PROP. TRASH RACK SEE DETAIL SHEET C-905 PROP. 4"DIA. OPENING W PROP. TOP=443.75 TUBE TO BE COVERED PROP. TRASH RACK SEE UPON FINAL SITE Sr AN FOR BLb KIHILIL 'B LET I N #2 A1V1 D 1 LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA LJBOHLIER E N G I N E E R I N G 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540)349-4500 Fax: (540)349-0321 VA@BohlerEng.com Lic. No. 0402056625 C_ 16/11MG90 4 SHEET TITLE: POND 4B DETAILS SHEET NUMBER: C-906 -FINFL $TIE PLFMNNO- BI.00KMANO LRN$EUILT PIAMV1520ppbW I.UW(i PRINTED BY: PBEpR T2031®11:53 M1 LhST $VVEU BY: FBmIR VA DEQ STORMWATER DESIGN SPECIFICATION NO.2 SHEET FLOW TO FILTER OR OPEN SPACE SECTION 9. MAINTENANCE 9.1. Maintenance Agreements Section 4 VAC 50-60-124 of the regulations specifies the circumstances under which a maintenance agreement must be executed between the owner and the local program. This section sets forth inspection requirements, compliance procedures if maintenance is neglected, notification of the local program upon transfer of ownership, and fight -of -entry for local program personnel. All Vegetated Filter Strips must be covered by a drainage easement to allow inspection and maintenance. If the filter area is a natural Conserved Open Space, it must be protected by a perpetual easement or deed restriction that assigns the responsible party to ensure that no future development, disturbance or clearing may occur within the area, except as stipulated in the vegetation maintenance plan. If the Vegetated Filter Strip is located on a residential private lot, the existence and purpose of the Filter Strip shall be noted on the deed of record. Homeowners will need to be provided a simple document that explains the purpose of the Filter Strip and routine maintenance needs. A deed restriction or other mechanism enforceable by the qualifying local program must be in place to help ensure that Filter Strips are maintained and Conserved Open Space Areas are not converted or disturbed. The mechanism should, if possible, grant authority for local agencies to access the property for inspection or corrective action. 9.2. Maintenance Inspections Annual inspections are used to trigger maintenance operations such as sediment removal, spot re - vegetation and level spreader repair, ideally, inspections should be conducted in the non -growing season when it easier to see the flow path. Example maintenance inspection checklists for Sheet Flow to a Filter Strip or Conserved Open Space areas can be accessed in Appendix C of Chapter 9 of the Virginia Stormwater Management Handbook or at the Center for Watershed Protection's website at: htto://www.cwo.ora/Resource Library/Controlling Runoff and Discharges/sm.htm (scroll to Tool6: Plan Review, BMP Construction, and Maintenance Checklists) Inspectors should check to ensure that: • Flows through the Filter Strip do not short-circuit the overflow control section; • Debris and sediment does not build up at the top of the Filter Strip; • Foot or vehicular traffic does not compromise the gravel diaphragm; • Scour and erosion do not occur within the Filter Strip; • Sediments are cleaned out of Level Spreader forebays and flow splitters; and • Vegetative density exceeds a 900% cover in the boundary zone or grass filter. 9.3. Ongoing Maintenance Once established, Vegetated Filter Strips have minimal maintenance needs outside of the spring clean up, regular mowing, repair of check dams and other measures to maintain the hydraulic efficiency of the strip and a dense, healthy grass cover. Vegetated Filter Strips that consist of grass/turf cover should be mowed at least twice a year to prevent woody growth. • Inspect the condition of stormwater inlets to the pond for material damage, erosion or undercutting. • Inspect the banks of upstream and downstream channels for evidence of sloughing, animal borrows, boggy areas, woody growth, or gully erosion that may undermine embankment integrity. • Inspect the pond outfall channel for erosion, undercutting, rip -rap displacement, woody growth, etc. • Inspect the condition of the principal spillway and riser for evidence of spalling, joint failure, leakage, corrosion, etc. • Inspect the condition of all trash racks, reverse -sloped pipes, or flashboard risers for evidence of clogging, leakage, debris accumulation, etc. • Inspect maintenance access to ensure it is free of woody vegetation, and check to see whether valves, manholes and locks can be opened and operated. • Inspect internal and external side slopes of the pond for evidence of sparse vegetative cover, erosion, or slumping, and make needed repairs immediately. Based on inspection results, specific maintenance tasks will be triggered. Example maintenance inspection checklists for Wet Ponds can be accessed in Appendix C of Chapter 9 of the Virginia Stormwater Management Handbook (2010) or at the CWP website at: h Wwww. r R ur Library/Controllina Runoff and Di h r sm.h m (scroll to Tool6: Plan Review, BMP Construction, and Maintenance Checklists) For a more detailed maintenance inspection checklist, see Appendix B in CWP Stormwater Pond and Welland Maintenance Guidebook (2004). Maintenance is needed so stormwater ponds continue to operate as designed on a long-term basis. Wet ponds normally have fewer routine maintenance requirements than other stormwater control measures. Stormwater pond maintenance activities vary regarding the level of effort and expertise required to perform them. Routine stormwater pond maintenance, such as mowing and removing debris and trash, is needed several times each year (See Table 14.6). More significant maintenance (e.g., removing accumulated sediment) is needed less frequently but requires more skilled labor and special equipment. Inspection and repair of critical structural features (e.g., embankments and risers) needs to be performed by a qualified professional (e.g., a structural engineer) who has experience in the construction, inspection, and repair of these features. The maintenance plan should clearly outline how vegetation in the pond and its buffer will be managed or harvested in the future. Periodic mowing of the stormwater buffer is only required along maintenance rights -of -way and the embankment. The remaining buffer can be managed as a meadow (mowing every other year) or forest. The maintenance plan should schedule a shoreline cleanup at least once a year to remove trash and floatables. I EN VA DEQ STORMWATER DESIGN SPECIFICATION NO. 14 WET POND SECTION 9: MAINTENANCE 9.1. Maintenance Agreements Section 4 VAC 50-60-124 of the regulations specifies the circumstances under which a maintenance agreement must be executed between the owner and the local program. This section sets forth inspection requirements, compliance procedures if maintenance is neglected, notification of the local program upon transfer of ownership, and right -of -entry for local program personnel. Access to wet ponds should be covered by a drainage easement to allow inspection and maintenance. It is also recommended that the maintenance agreement include a list of qualified contractors that can perform inspection or maintenance services, as well as contact information for owners to get local or state assistance to solve common nuisance problems, such as mosquito control, geese, invasive plants, vegetative management, and beaver removal. The CWP Pond and Wetland Maintenance Guidebook (2004) provides some excellent templates of how to respond to these problems. 9.2. First Year Maintenance Operations Successful establishment of wet ponds requires that the following tasks be undertaken during the first year following construction. Initial inspections. For the first six months following concoction, the site should be inspected at least twice after storm events that exceed a 1/2-inch of rainfall. Planting of Aquatic Benches. The aquatic benches should be planted with emergent wetland species, following the planting recommendations contained in Stormwater Design Specification No. 13 (Constructed Wetlands). Spot Reseeding. Inspectors should look for bare or eroding areas in the contributing drainage area or around the pond buffer, and make sure they are immediately stabilized with grass cover. Watering. Trees planted in the pond buffer need to be watered during the first growing season. In general, consider watering every 3 days for first month, and then weekly during the remainder of the first growing season (April - October), depending on rainfall. 9.3. Inspections and Ongoing Maintenance Tasks Maintenance of a wet pond is driven by annual inspections that evaluate the condition and performance of the pond, including the following: • Measure sediment accumulation levels in the forebay. • Monitor the growth of wetland plants, trees and shrubs planted. Record the species and their .approximate coverage, and note the presence of any invasive plant species. Table 14.6. Typical Wet Pond Maintenance Tasks and Frequency Maintenance Items Frequency • Mowing - twice a year a Quarterly or after major storms • Remove debris and blockages (>1 inch rainfall) • Repair undercut, eroded, and bare soil areas • Mowing Twice a year • Shoreline cleanup to remove trash, debris and floatables • A full maintenance inspection Annually • Open up the riser to access and test the valves • Repair broken mechanical components, if needed • Pond buffer and aquatic bench reinforcement plantings One time -during thesecond year following construction • Forebay Sediment Removal Every 5 to 7 years • Repair pipes, the riser andspillway, as needed From 5 to 25 years 9.4. Sediment Removal Frequent sediment removal from the forebay is essential to maintain the function and performance of a wet pond. Maintenance plans should schedule cleanouts approximately every 5 to 7 years, or when inspections indicate that 50% of forebay sediment storage capacity has been filled. The designer should also check to see whether removed sediments can be spoiled on -site or must be hauled away. Sediments excavated from wet ponds are not usually considered toxic or hazardous. They can be safely disposed of by either land application or land filling. Sediment testing may be needed prior to sediment disposal if the retrofit serves a hotspot land use. SECTION 10: COMMUNITY & ENVIRONMENTAL CONCERNS Wet ponds can generate the following community and environmental concerns that need to be addressed during design. Aesthetic Issues. Many residents feel that wet ponds are an attractive landscape feature, promote a greater sense of community and are an attractive habitat for fish and wildlife. Designers should note that these benefits are often diminished where wet ponds are under -sized or have small contributing drainage areas. Existing Wettands. A wet pond should never be constructed within an existing natural wetland. Discharges from a wet pond into an existing natural wetland should be minimized to prevent pollution damage and changes to its hydroperiod. Existing Forests. Construction of a wet pond may involve extensive clearing of existing forest cover. Designers can expect a great deal of neighborhood opposition if they do not make a concerted effort to save mature trees during pond design and construction. u ``. PROPOSED GREENWAYI OPEN, SPACE BUFFER 1a7.7s PROP. MULTIFAMILY APARTMENTS 4 STORY 60' MAX PROP. HEIGHT (BUILDING TYPED-) FF = 458.50 BF = 447.84 i 4 STORY 60' MAX PROP. HEIGHT (BUILDING TYPE -C-) FF = 456.50 BF = 445.84 ✓ _ � I I I\1 'I� I ��` G445.64 ` � I LEVEL SPREADER PLAN VIEW SCALER"=20' Level Spreader Design Table Level Spreader ID LS-413 Comments Downstream Outfall Undisturbed Native Outfall Condition Vegetation Grassed area with 90% land Land Cover coverage or better Slope (%) 2.22% Length (ft) 35' Design Criteria 1-yr Inflow (cfs) 2.05 Flow Spreader Length (ft) 116.9 13 LF min 130 LF max NOTE: 1. Minimum Flow Spreader length shall be 40LF per 1 CFS of inflow when outfalling to a Forested or Re -forested area, and 13LF per 1 CFS of inflow when outfalling to a grassed area with 90% land coverage or better. 2. The first 10' of filter past the level spreader must by 2% slope or flatter. 3. SEE SITE PLAN SDP2018-00050 FOR LEVEL SPREADER DITCH CALCULATIONS. LEVEL SPREADER DETAIL EXISTING GRADE 2.1 MAX SLOPE LEVEL SPREADER RIGID LIP 81'DEEP V-DITCH S. III=III = � -III-III-I - � -►_ II-I�I-I�I-I�I==7'MINI�I=1�I �I-I I I -I � I -I � I I � I -I � I -I � I -I I'' 3�° • � III -I I I I I I=1 I I=1 I I=1 I I=1 I I=1 I I=1 I I=1 I I=1 I I I I I=1 I I MIN. 3WIDE LAYER OF #57 STONE 3" THICK WIFILTER FABRIC NOTES: 1. FILTER FABRIC MUST BE PERMEABLE AND MEET THE REQUIREMENTS FOUND IN STD. & SPEC. 3.191N THE VESCH. 2. THE RIGID LIP LEVEL SPREADER SHALL BE STANDARD WEIGHT 3000 PSI CONCRETE. 3. LEVEL SPREADER LENGTH SHALL BE DETERMINED BASED UPON THE LEVEL SPREADER DESIGN CALCULATIONS INCLUDED IN THIS PLAN. 4. CONTRACTOR TO ENSURE THAT THE RIGID LIP REMAINS AT A CONSTANT ELEVATION FOR THE ENTIRE LENGTH. VatEiAl®V aF tallow aroma • . niatW.neE>a r�nnNo e.s>Eoow {IOM PLAM vow cors,.ir s•reslcnrxx� .s•ee••urr uce a vEat��r®uv VrRLS com Lr - Mwerr - U � s U Z Z O Q z �a Zof ;�0LL = ¢o Cx72Za=GN $_ OW �QZ�=g Z Q KU QF inn a❑ R S® ♦��♦ o8 w ❑ Q❑ zQ aa= 3R< u� aZO r�z ;z<n ro:w❑aaCv 8� �u�ooww¢ ;aw x al J Q N 2 En L Z l o a Y o ¢ a r 3Z wZ d Ww0 :e 3 z Zz oo Ww c� aworr,❑ c7 w �w ❑zmzzza d' Q � Z N a ❑ N Z 5N REVISIONS REV DATE COMMENT BY 1 9/24/18 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENTI COUNTY COMMENTS RTY 5 6/19/19 AMENDMENTI COUNTY COMMENTS RTY 6 4/20/21 AS -BUILT PLAN RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. Its free. Its the law. NOT APPROVED FOR CONSTRUCTION PROJECT NO.: V152000 DRAWN BY: EEN CHECKED BY: RTY DATE: 4/8/2019 SCALE: NA CAD I.D.: SW1 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR BROOKHILL BLOCKS 4A AND 4B APARTMENTS- AMENDMENT1 LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA B O Y,E E N G I N E E RO I N G BLACKWELL PARK LANE, SUITE WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540)349-0321 Lic. No. 0402056625 6/19/19 r SHEET TITLE: LEVEL SPREADER LS-413 DETAIL SHEET NUMBER: C-907 -FINK SITEPLAMN BLOOKMMDOB BUILTPW V15lOW$WI.O PRIWEDBY:ABEOIR ]]021@4:WPM l $AV DBY:ABEDIR TYPICAL LEVEL SPREADER DETAIL FIBERGLASS SEPARATIONCYLINDER NDER I ANDINLET TOP SLAB ACCESS (SEE FRAME AND COVER DETAIL) A FLOW - FIBERGLASS SEPARATION CYLINDER �\ AND INLET \ B INLET PIPE (MULTIPLE INLET PIPES MAY BE ACCOMMODATED) OIL BAFFLE SKIRT SEPARATION SCREEN s]-M°�� jai ,L r O «t•fis• �- MNL PLAN VIEW B43 N.T.S. CENTER OF CDs STRUCTURE, SCREEN AND SUMP OPENING A FI% P ' s TOP SLAB ACCESS [182911.D. CONTRACTOR TO GROUT TO FINISHED GRADE GRADE RINGS/RISERS I V I I 1 I Cc m w tr I .� 1'-9'(53111 1-- I � I SOLOS STORAGE SUMP ELEVATION A -A N.T.S./S CFwr OUTLET PIPE PERMANENT POOL ELEV. 1 ;Y CDS3020-6-C DESIGN NOTES CD 020CRATED TREATMENT CAPACITY IS 20 CPS (56.6 L!s], OR PER LOCAL REGULATIONS. MAXIMUM HYDRAULIC INTERNAL BYPASS CAPACI TY IS 20.0 CPS (566 LIS]. IF THE SITE CONDITIONS EXCEED 20.0 CFS 1566 Lts]. AN UPSTREAM BYPASS STRUCTURE IS REQUIRED. THE STANDARD COS3020-&C CONFIGURATION IS SHOWN. ALTERNATE CONFIGURATIONS ARE AVAILABLE AND ARE LISTED BELOW. SOME CONFIGURATIONS MAY BE COMBINED TO SUIT SITE REQUIREMENTS. CONFIGURATION DESCRIPTION GRATED INLET ONLY (NO INLET PIPE) GRATED INLET WITH INLET PIPE OR PIPES CURB INLET ONLY (NO INLET PIPE) CURB INLET WITH INLET PIPE OR PIPES SEPARATE OL BAFFLE (SINGLE INLET PIPE REQUIRED FOR THIS CONFIGURATION) SEDIMENT WEIR FOR NJDEP 1 NJCAT CONFORMING UNITS FRAME AND COVER (DIAMETER VARIES) N.T.S. SITE SPECIFIC DATA REQUIREMENTS STRUCTURE ID STM Al WATER QUALITY FLOW RATE (CFS OR Us) PEAK FLOW RATE (CFS OR Vs) RETURN PERIOD OF PEAK FLOW (YRS) SCREEN APERTURE (2400 OR 4700) PIPE DATA I.E. 1 MATERIAL DIAMETER INLET PIPE t 436.62 RCP 24" INLET PIPE 2 ' OUTLET PIPE 1435.52 RCP 24" RIM ELEVATION 444.50 ANTFFLOTATION BALLAST I WIDTH HEIGHT NOTESISPECIAL REQUIREMENTS ' PER ENGINEER OF RECORD GENERAL NOTES 1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE. 2. FOR SITE SPECIFIC DRAWINGS WITH DETAILED STRUCTURE DMENSIONS AND WEIGHT, PLEASE CONTACT YOUR CONTECH ENGINEERED SOLUTIONS LLC REPRESENTATIVE. w .Contec tEScom 3. CDS WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THIS DRAWING. CONTRACTOR TO CONFIRM STRUCTURE MEETS REQUIREMENTS OF PROJECT. 4. STRUCTURE SHALL MEET AASHTO HS20 LOAD RATING, ASSUMING EARTH COVER OF V- 2'. AND GROUNDWATER ELEVATION AT. OR BELOW. THE OUTLET PIPE INVERT ELEVATION, ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGS SHALL MEET AASHTO M306 AND BE CAST WITH THE CONTECH LOGO.. S. IF REQUIRED, PVC HYDRAULIC SHEAR PLATE IS PLACED ON SHELF AT BOTTOM OF SCREEN CYLINDER. REMOVE AND REPLACE AS NECESSARY DURING MAINTENANCE CLEANING. S CDS STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING TO ASTM C-478 AND AASHTO LOAD FACTOR DESIGN METHOD. INSTALLATION NOTES A. ANY SUB -BASE, BACKFILL DEPTH, AND/OR ANTI -FLOTATION PROVISIONS ARE SRESPECFIC DESIGN CONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD. B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE CDs MANHOLE STRUCTURE, C. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS AND ASSEMBLE STRUCTURE. D. CONTRACTOR TO PROVIDE, INSTALL, AND GROUT INLET AND OUTLET PIPE(S). MATCH PIPE INVERTS WITH ELEVATIONS SHOWN. ALL PIPE CENTERLINES TO MATCH PIPE OPENING CENTERLINES. E. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TO FLOWLINE INVERT MINIMUM. IT IS SUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED. STM Al - CDS UNIT DETAIL POND 4A STORMWATER QUANTITY CHART STORM EVENT INFLOW OUTFLOW 1 YR. 15.71 CFS 3.06 CFS 2 YR. 20.50 CFS 10.53 CFS 10 YR. 34.91 CFS 25.66 CFS 100 YR. 61.94 CFS 51.99 CFS NOTE: POND 4A NOT DESIGNED FOR QUALITY CONTROL AND ONLY DESIGNED TO CONTROL QUANTITY OF WATER LEAVING SITE. Maintenance Cleaning The CDS system should be inspected at regular intervals and sYs P 9 Cleaning of a CDS stems should be done during d weather 9 systems n 9 dry maintained when necessary to ensure optimum performance. conditions when no flow is entering the system. The use of a The rate at which the system collects pollutants will depend more vacuum truck is generally the most effective and convenient heavily on site activities than the size of the unit. For example, method of removing pollutants from the system. Simply remove unstable soils or heavy winter sanding will cause the grit chamber the manhole covers and insert the vacuum hose into the sump. to fill more quickly but regular sweeping of paved surfaces will The system should be completely drained down and the sump slow accumulation, fully evacuated of sediment. The area outside the screen should also be cleaned out if pollutant build-up exists in this area. Inspection In installations where the risk of petroleum spills is small, liquid Inspection is the k to effective maintenance and is easily y contaminants may not accumulate as quickly as sediment. performed. Pollutant transport and deposition may vary from However, the system should be cleaned out immediately in year to year and regular inspections will help ensure that the the event of an oil or gasoline spill should be cleaned out system is cleaned out at the appropriate time. At a minimum, immediately. Motor oil and other hydrocarbons that accumulate inspections should be performed twice per year (e-g. spring on a more routine basis should be removed when an appreciable and fall) however more frequent inspections may be necessary layer has been captured. To remove these pollutants, it may in climates where winter sanding operations may lead to rapid be preferable to use absorbent pads since they are usually less accumulations, or in equipment washdown areas. Installations expensive to dispose than the oiVwater emulsion that may be should also be inspected more frequently where excessive created by vacuuming the oily layer. Trash and debris can be amounts of trash are expected. netted out to separate it from the other pollutants. The screen The visual inspection should ascertain that the system should be power washed to ensure it is free of trash and debris. components are in working order and that there are no Manhole covers should be securely seated following cleaning blockages or obstructions in the inlet and separation screen. activities to prevent leakage of runoff into the system from above The inspection should also quantify the accumulation of and also to ensure that proper safety precautions have been hydrocarbons, trash, and sediment in the system, Measuring followed. Confined space entry procedures need to be followed pollutant accumulation can be done with a calibrated dipstick, if physical access is required. Disposal of all material removed tape measure or other measuring instrument. If absorbent from the CDS system should be done in accordance with local material is used for enhanced removal of hydrocarbons, the level regulations. In many jurisdictions, disposal of the sediments may of discoloration of the sorbent material should also be identified be handled in the same manner as the disposal of sediments during inspection. It is useful and often required as part of an removed from catch basins or deep sump manholes. operating permit to keep a record of each inspection. A simple form for doing so is provided. Access to the CDS unit is typically achieved through two manhole access covers. One opening allows for inspection and cleanout of the separation chamber (cylinder and screen) and isolated sump. The other allows for inspection and cleanout of sediment captured and retained outside the screen. For deep units, a - single manhole access point would allows both sump cleanout and access outside the screen. , �} The CDS system should be cleaned when the level of Sediment _ has reached 75% of capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated. If absorbent material is used, it should be replaced when r - significant discoloration has occurred. Performance will not be impacted until 100%of the sump capacity is exceeded however `y it is recommended that the system be cleaned prior to that for easier removal of sediment. The level of sediment is easily determined by measuring from finished grade down to the top of the sediment pile. To avoid Underestimating the level of sediment in the chamber, the measuring device must be lowered to the top of the sediment pile carefully. Particles at the top of - the pile typically offer less resistance to the end of the rod than consolidated particles toward the bottom of the pile. Once this measurement is recorded, it should be compared to the as -built drawing for the unit to determine weather the height of the sediment pile off the bottom of the sump floor exceeds 75% of + "" the total height of isolated sump. ,.a' �`.�! •"a•. -'Jr 5' x 5' RISER TOP OF RISER = 434.25 10 YR W.S.E.: 434. 7 RECTANGULAR ORIFICE - 30" X 9" 2 YR W.S.E.: 433.33 INV=432.75 1YRW.S.E.:432.81! "t c� 2% PROP. (3) 60' L , 5' DIAMETER CMP CHAMBERS IN STONE ENCASEMENT TOP OF STONE: 429.5 TOP OF CHAMBER: 428.5 BOTTOM OF CHAMBER: 423.5 BOTTOM OF STONE: 422.5 j GRATE INLET INV=429.75 O 60' (1) 6" LOW 2.33' FREEBOARD CDS Model: Location: Date Water depth to sediment' Floatable Layer Thickness' Describe Maintenance Performed Maintenance Personnel Comments I . The water depth to sediment is determined by taking two measurements with a stadia rod: one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. It the difference between these measurements is less than the values listed in table I the system should be cleaned out. NOW to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. 2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In the event of an oil spill, the system should be cleaned immediately. PROPOSED BLOCK 4A POND RISER DETAIL 100 YR WSEL= 435.19 TOP . 4 BERM 10 YR WSE = 434.37 ----- ------------- �` ELEV. 49i-P5 -_ ______ _ _ ______ -Q POND STORAGE = 23,410 C.F. UNDERGOURND DETENTION STORAGE = 5,347 C.F. TOTAL STORAGE = 28,757 C.F. PROPOSED BLOCK 4A STORMWATER DETENTION SYSTEM MADE IN THE U.S.A. AVAILABLE MATERIALS: MILD STEEL (NO FINISH) - WGT: 189.9lbs. MILD STEEL (GALVANIZED) - WGT: 189.91bs. STAINLESS STEEL -WGT: 189.9 Ibis. ALUMINUM - WGT: 64.1 Ibis. CUSTOM SIZES AVAILABLE AVAILABLE UPON REQUEST WITH: ACCESS PORT ANTI -VORTEX PLATE t A � TOP-437.48 PROP. TRASH RACK " 2 YR WSE=433.33 - '---- - - - - -- --- J _------_-- 434.44 ----- I YR WSE = 432.81 -- � 3f -1 PROP. RISER TOP = 434...2 ------' m - PROP. (2) RECTANGULAR ORIFICE INV_432.75 4 PROP. TRASH RACK (TYP) 6. 6 TOP OF CHAMBER = 4 PROP. 6.0" DIA ORIFICE PROP. TRASH RACK (TYP) INV=423.50 3OTTOM OF CHAMBER = 423.50 1 � ° °� • N 422.18 PROP. INV=422-8O N • : ,,, •: A. rn N • in N PROP. 63.90 - 24" RCP @ 1.0% SEE POND PROFILE FOR CONTINUATION y`--- --- --- -;,- \ _ - ---- _-_' 1 YYR SrL= .9 - _ _ 1YR WSEL 7 TOP-- _ --- _ 1 � �2YR WS 43333 --- TOE-432.45' --- SDMH - 1YRW 43281 Z. -- ' P RACK: 431 .42' TOE - `10-423.61TOP: 429.77 �' f'6 T TOE-432.95 ' SOP- 43 7.55 ,- PROP. (CD -4A) ryb) 442 :\ INV-434.60 ' ® STM V Al ------ SDMH RIM-444.94' I \435 .46' \ I U N C"2(i 1 I I F I 1 .TOE-432.16' I I I I I / D RIM-434.44' =` 10-422.18' 8 _.__.___ DE-432.5 -_ ; %l`�� ley, SOP-436.47' INV-432.09' ®��• SDMH / RIM-437.32'=) POND VOLUME I-433.10 : r CONFIRMED TO BE PER 0-432.99' DESIGN AND ADEQUATE I I(I I IN AS BUILT CONDITIONS 1 ��IIJ W N U � s UZ Z 00 F- �a ZLa0�OLL 1 =2 w a ¢O u_ Cx7��a=GN $_ ION �QZ�=g Z Q � KU aFrOnO R S® r _B a0 Z¢ ac. 3z¢ - >-- Di- ZW Y W O¢ U, '(Dcc >,�o owwQ ;¢w x mmxx¢ 3¢N 0m2 �Oa=Z 2Z x i H 100: m ozo S0ca u a Y 0 0 a 3Z wZ d ZS�xYB'Wg Z FZZ 00WW r7 ¢ W Oy_y WmawOww W 2 0W w 5Zm ZZZa ♦00000 zZ! N � � N z 5N REVISIONS REV DATE COMMENT BY 1 9/24/18 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENTI COUNTY COMMENTS RTY 5 6/19/19 AMENDMENTI COUNTY COMMENTS RTY 6 4/20/21 AS -BUILT PLAN RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. NOT APPROVED FOR CONSTRUCTION PROJECT NO.: V152000 DRAWN BY: EEN CHECKED BY: RTY DATE: 4/8/2019 SCALE: NA CAD I.D.: SW1 PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR BROOKHILL BLOCKS 4A AND 4B APARTMENTS- AMENDMENT1 LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA N G 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540)349-0321 VAO-BohlerEna.com Lic. No. 0402056625 C_ 6/19/19 14 SHEET TITLE: POND 4A DETAILS SHEET NUMBER: .909 C -FINK SREPLAMw BLOOKMAND4B BUILTPWMV15loW$WI.O PRIMEDBY:MMIR 7.2021®1153M1 IAST$AVEDBY:ABEDIR STORMWATER DETENTION SYSTEM - POND 4A PLAN VIEW 20 10 5 0 20 1 "= 20'