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HomeMy WebLinkAboutWPO201800051 Plan - Stormwater Minor Amendment 2019-08-01I am( "81 ,M p w; I b i , L't(I 110 t2l I a NAM"! I RK31 1 ROOM vill, -W*431 WOO ILM01 [TAMS A\_1 8 a TAX MAP PARCELS 04600-00-00-001800 04600-00-00-0018AO 04600-00-00-001900 04600-00-00-019AO 04600-00-00-019B1 04600-00-00-019B3 CONTACT INFORMATION LOCATION OF SITE 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: 10/22/2015 ♦ VIRGINIA STORMWATER MANAGEMENT REPORT WP0201700027 "BROOKHILL STORMWATER MASTER PLAN & OVERLOT GRADING PLAN" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 03114/2017 (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: 10/26/2017 ♦ VIRGINIA STORMWATER MANAGEMENT PLAN WP0201800013 "ROAD IMPROVEMENT PLAN - PHASE 1, STATE ROUTE 643 POLO GROUNDS ROAD AND BRtOOKHILL SECTION 1" PREPARED BY: BOHLER ENGINEERING PROJECT NUMBER: V152000 DATED: 12/15/2017 GOVERNING AGENCIES ♦ COUNTY OF ALBEMARLE DEPARTMENT OF COMMUNITY DEVELOPMENT 401 MCINTIRE ROAD CHARLOTTESVILLE, VA 22902 TEL: (434) 296-5832 FAX: (434) 972-4126 ♦ 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 ROUTE 29 (SEMINOLE TRAIL ROAD) AND STATE ROUTE 643 (POLO GROUNDS ROAD) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA 0 S LOCATION MAP COPYRIGHT ADC: THE MAP PEOPLE PERMIT USE INO. 20602153-5 SCALE:: 1 "=2000' ♦OWNER: HAUGH, CHARLES R & E. J. OLGESBY JR (TRUSTEES) 435 PARK ST. CHARLOTTESVILLE VA, 22901 =11vanic'.41 #APPLICANT: RIVERBEND MANAGEMENT 321 EAST MAIN STREET, SUITE 201 CHARLOTTESVILLE, VA 22902 (434)245-4932 CONTACT:ALAN TAYLOR BOHLER 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: (54I.0) 349-0321 www.BohlerEngineering.com CONTACT: RYAN T. YAUGER, P.E. SHEET INDEX I COVER SHEET I C-100 I EROSION & SEDIMENT CONTROL PLAN - PHASE IA I C-200 - C-201 I d EROSION & SEDIMENT CONTROL NOTES I C-204 ? I SEDIMENT TRAP AND BASIN DETAILS I C-206A - 8 R86B I A j POND 4B DETAILS I C-906 4 APPROVED by the Albemarle County Community Dev to ment Department Date ! z File P todoCj , wt d"w4j U F o > F 2 f� Of Z F ran z 2) w " ¢ K z = 0 LL W z a F g W~ �a�J:r 0< a� w� z�C �0¢FcnO s® F�j a U a • ..... zz"aE w 0 W ¢o Q¢ aax -1Z¢ y Z HU }QW�a�' _wm��>m H� ONx-x���z E- w-w ¢OOw A icnD_ mcoZU w vaa ° ° ¢ � w z o wr H 52 zw Lzi ¢ z �yW w� RA QIzp0Op a awOwww �zmzzza �a REVISIONS REVL9AMENDMENT1 MMENT BY 1 Y COMMENTS RTY 2 Y COMMENTS RTY 3 RTY NDMENT1 RTY 5 6/19/19 AMENDMENT 1 COUNTY COMMENTS 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.: SDI PROJECT: VIRGINIA STSTORMWATERML 7� �NAG.EME T PLA FOR BROOKHILL BLOCKS 4A AND 4B A»PAARTMENTS AMENDMENT I LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA no BOHLER' ENGINEERING 28 BLACKWELL PARK LANE, SUITE 201' WARRENTON, VIRGINIA 20186 Phone: (540)349-4500 Fax: (540) 349-0321 McD.BohlerEna.com 5HEE I TITLE: CCOVER S HIEET SHEET NUMBER: C-100 H:\15\V152000\DRAWINGS\PLAN SETS\SECTION I\BLOCK 4A AND 4B - FINAL SITE PLAN\WPO -BLOCK 4A AND 4B\AMENDMENT I\V152000SD1. 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PROP. , \ \ � �� � DUMPSTER$ ` .--, `, - / i I ( 1 ` 1\ 1 r 3.08 CULVERT INLET PROTECTION CIP 1 ' 1 ` � `\ \ \ \` \ \` \ \. _ \ � \ \\ .` ` ,,.,-.i I 1 / `. `. `. `. � � _ �., . `\ +, ` 3.09 TEMPORARY DIVERSION DIKE DD I 1 1 \\ \` \ \ \ \, ♦` \` ♦` �` ST '', ! f / \ \ \ \ \ ,PORTABLE♦ \ \ I , / ♦` \\ `,` ♦� ♦` \ \ \ \ \ 1 1 , \ \ \ ♦ ♦ ♦ ,, , , / / 1 1 \ \ ♦ , � ♦, ♦ , ♦ \ 1 \ ♦ ♦ \ \ \ . q� / 1 i 1. ` \ �` `�\ �`♦ `. `♦ � 2:1 438 43g I1 \ `. `, .` .� .� ,` ' � ' ! . '''-�- _ PROP. � , // ' /_ `• ,``•` O V 11 ' ```` `` 1 / '1 ' / \\\ ,� 456 / � J I 1 \\ `.` � ♦� >. � `-----� 0 4� q q3B 438 _'__ FUEL DRAIN � ' , / 0�� `\ `, T ~ B � \ � , , J / ,, ,, ,, ., `,,, .,, � ., , � .� '�. ;� ,-- -- - TO ST-4C" PAN,--- ., ,I - /' \, \ \ \` � � i �% 1 , 'i w i'r � , ,' %/ ! ,,' ^',, I / / / -,' - "� DA• 2.65 " , _- ' ' / ` ' j � 'j /� � /% � ' -- '' ' ��� ONSITE DA: 8.99 AC i � ' ,, .'' / ,. ',, . / i , � .,• , / � , �' �' PROP. CE, ' , 458 , / , / / , i -,,' �� / /„ ' �. 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'�� \ , tp � tl�• `�tl. 11. `.III• \ \ �\ i � ,i , � , � w '-�...�`+ ' � '+'41D ., ., `. ,, , �, f \ \ \` ` lV�� r , `�' PROP. 1 FUEL 1 i ` `\ / i � ti� ' , / / i � � � / i i / i � l \ J \ � i f / � . .� \ DRAIN PAN �``. � I `` \` \ i , � �� b � � / � /' � � rr rJ / l/ i i ; ` 11 j \ r � /r � / ! i 1 � _`. `��.` �.�. \� \� `� SAREAG -"_-- nl 1 •r 1 / pp , , � � � , � ' ` � � • / � � I i � i t \ � \\I � 1 i 1 ,'- PROP.. op \ ��+' / . . 1 1 1. 1 / w gi ._ 1 r / i / / i � / i �' : � / I � i � 1 1 �. �� \ 1 1 r - �__„-.._ PORTABLE' -- _ _ •�`f �/l 1 > r / 1 1 1 � � + 1 1 / - �?•.�, _ TOILETS � _� .�_� - _ �� - �''` __ l� � � �.: f "-- / � /I f \ _ I `� i � /i ri'/i' i i / r __'_ `�"/ / it f _ ---- _ +�.��`. ,� f l ; \` \` `,` ` �..�1 `I �\V \\ � ,q-__-__..'''___`--- .�� `�' � DUMPSTER _ � � "`+.� .� _ / -____ � .� - I / I / / / / / �.. / I . ,� �. \ � y�\ \ , ♦ \ \ \� 1 / / / r r /., /-------- ` ` 2.1 , \\ � 1 � .` � \ � `\ \` \ \ tp .. - w "'`_�_ \ \ �-- � GCS •,_�' _ ` l/ ; ; ; ; ; ; ; ; ;-----___---__----- _, ., \ \ ., _, ., __ I , 1 1 , , �. 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OR9NV `\ \ `\ `\� `, \\ `\ \\ \`___ __---------- ___----- //' ; i e � . .�.� �` � . - ____---470--^' ___-------- _ .---- -.; .,,'./' __- -_ ' ; i �``. ``� vim``.. ---------------------- __' <,r,-- _ .. , _ ___ __ `. _ -,1 _. ., _ __ �. - �/ `�. _. _ _ . .. - `t ' t`. M1 . _ { i i � \�� ```'``�__ ------------------------ --- -'-------- � __------'--- -------- _ ,�,� -----"EXISTING ENTRANCE TO 8E TEMPORARILY UTILIZED AS PAVED \"r'f--��'���r �� ,. .. - _ __ ;458 ,... _ • _._ _ 1 � ___ \ ________ - _- CONSTRUCTION ENTRANCE WITH WASH OUT DISCHARGING TO ST-4B r \ _ ____ --<--' :. . ------------ E � ,- __ _M ..__� � � _r. ._ _- .. _. __�- -- - ------ - / ______-__________________ _..---- ND ARCHER IS THEN UTILIZE ONSTRUCTION -._,-- r ---- ---. n ..---- __.._--_ - --.._- ;.,�, r . --'------------- �. ..,_ ENT 1 _- / . t, .. N...� ... �ny�„w«mYY., w4Aw'-.,r ..r.'_ .. �---_-_•r / rr�.Tr. �. . �. -� I AVE .., \ -HAS BEGUN A D AS C `\ ------------ ..-------------- _ ��, � r �. _ _ -- _ �--. ,, ___- � � 45#------------'' - \ \ 3.13 TEMPORARY SEDIMENT TRAP ST 3.14 TEMPORARY SEDIMENT BASIN SB 3.18 OUTLET PROTECTION QP 3.31 TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDING PS PS ERNST STEEP SLOPE GRASS MIX - ' (2:1 SLOPES) 2.1 3.39 DUST CONTROL DC DC ��®JC � ����1� JLJ1 PRESERVED SLOPES MANAGED SLOPES 1. SB-11 (BUILT WITH WP0201700037) WAS ORIGINALLY DESIGNED AND SIZED TO HANDLE 18.30 ACRES OF RUNOFF. WITH THIS REVISION, THE TOTAL DRAINAGE AREA TO SB-11 IS NOW 14.72 AC. THIS IS THE OPINION OF THE ENGINEER THAT THE SEDIMENT BASIN REMAINS ADEQUATELY SIZED. 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NOT APPROVED FOR CONSTRUCTION PROJECT No.: V152000 DRAWN BY: EEN CHECKED BY: RTY DATE: 4/8/2019 SCALE: 1 "=40' CAD I.D.: OA1 PROJECT: spy �Ip'v��--.������ YJ Jl ®�AV'Jl �' V d y� a `f[� FO��ppR �J�®�J[��j`1j��� 11�71�71��pu!'VJL1/ �� A v 1�/�\JL(e7S �17J1.YgT�l�JLAb7 ��T1'�7JL 1.-, V'i.f]�11 O1V V� �11 l� ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHAF�LOTTESVILLE ALBEMARLE COUNTY, VA 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540)349-0321 VA@Boh/erEng.com TH�p u R1'�N YAU�ER y .p Lic. No. 0402056625 � ��.t� 6/19/19 t1�� F������� �� SHEET TITLE: ��' J°LIJLA�YJI�l�`I JL ®� JL �®.11_e �JLe�l � SHEET NUMBER: ����®d � H:\t S1V152000\DRAWINGS\PLAN SETS\SECTION 1\BLOCK 4A AND 4B -FINAL SITE PLAN\WPO -BLOCK 4A AND 4B\V1520000A1.DWG PRINTED BY: DREARDON 8.19.19 � 8:25 PM LAST SAVED BY'. 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I/ � ! i i I ' t` ' ' \ CIA� ' `` `~�~�` -`� '--__ --- - ----------------------------- SUPER SILT FENCE M /' a \ 1 , ' , / 1 l ; r / , 1 , io a ` ` S XX 41 ♦ \ 1 I \ ', ! < ------------- \ iA� \`♦ \� ♦�`♦ ------ --------------- _------- i / ~ 1 t` \I ' ` \ \` \` \` `� \ �`. ~• �\ _ _ - `� ~s -----------------•-- PAVED WASH RACK CE ® CE - ' 47 , 1 1 ` -- -- - 472 t\ 1 i `'~~ ---------- --- _-------------------- 3.05 SILT FENCE O X ' '_ 474 � ` � _ 470 , 2:1 476 `�'� 1 1 SF I `� ♦ ♦� \ + . i `♦ `♦ \ \ 1 `♦ _ ---' - '`` �`. ♦ N\\\\ `\ ` '`♦`♦.`� ` $ `►jr.\` ``.`` ``.`` `` `` �' '\` `. ``��` - _ ____ `------- —. _ DD - — 3.07 STORM DRAIN INLET PROTECTION IP 474 / -, lee ---- ~--''--------- _ ------ -. - ______ _ ---tv - - - / /� t \ — ------ -_i- ------------------------------------- --pTS _ CULVERT INLET PROTECTION ` ♦� -~ 1�° -------------------------------------- - , -- -- - - - ,~.� T ---_ `-_� - ----- --- 3.09 TEMPORARY DIVERSION DIKE DD DD 1� �W EW-�m z o Z 0 xz Zw� ow yZ I- w =W a O O F w LL K Lu�Zal2 W M W� •--I Q . J oy w o W wH ZQ C7Zcn aa¢2 gzg qs ZU WW z '7 �� > WO Oww W M��1 rn 22mi22a�� O z 2= W � Z) W Z TVrj V � -iU)X m.1zcw.! 00 Iz z a � u a a 0 W F1" a a H 32 w> Q i .� w50 a�z}2 Z-YYU)a o� Z I-zZ00IX it wu' a .-Qw0�> �� A ow ai-;�ul-i���g ('� a wwww2 2zmOzZZa ow z ....... Q z 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 1 COUNTY COMMENTS RTY 5 6/19/19 AMENDMENT 1 COUNTY COMMENTS RTY KNOW 'WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. %`� r»--'--'- ---� ~� ~ ~* �` -- ---- -- -- _ _--•---------------- -- ~ / \` .-.... ♦♦ \ \ ` `� \ ••1°w `� r :��.� - __-•..._---------------------- - ,.�:-.,> ., . ,,~ - ---- ---- ------ - NOT APPROVED FOR _______ _- _ CONSTRUCTION / \\\ t\ \` \ .� ♦\ .` _ _ ------------------ -------- - ~ 3.13 TEMPORARY SEDIMENT TRAP ST ------------------- --- '� - PROJECT No.: V152000 ---_----EEN ------------------------------ - - --.._ �- , - _ _- __ �7\`\l DRAWN BY: 1 ,. \ 1 `t �\ �`♦ ``. \ ------ CHECKED BY: RTY \ . - `' -------- _ - - TEMPORARY SEDIMENT BASIN ! I DATE: 4/8/2019 - -_ _ _ SB SCALE: CAD LD.: SP1 E It w �~ ~� ` ~~ w 318 OUTLET C --''' ---- ___ T PROTECTION OP 1 1 ---------^------------ / ' _ _^------------- DD �. --------- - �'�`~�� _ �\ 3.31 ---- ------------------ - ., TEMPORARY SEEDING TS TS 3.32 PERMANENT SEEDING PS PS - ---------------------- .�`♦ \ ERNST STEEP SLOPE GRASS MIX `�9�. TO S�T-4 B --- -- --- _ _ -. \ .,, , ; j , V% ,9� (2:1 SLOPES) 2:1 .,, TO SUPER SILT FENCE; 1 � DA•1 35 '!r ri I 3.39 DUST CONTROL DC DC �j `l C-�.30 --------------------- '� C=0.30 o / PROP. �••. -/ FUEL �, `. �-" T� ----DRAIN PAN ```~�� _-�'• • -�,' 150 L.F. / 0.25 AC. _ i NOTE: \/ \ \�---------------- 60'X50' _ _ - - _ DOTE: - STAGING - _ _ /'40 AREA _ ------------ --------- _ _ - / % lee 1. SB-11 (BUILT WITH WP0201700037) WAS ORIGINALLY DESIGNED AND ` ------ ---- _ `1•_ -,� -"-- PROP - _-- _-- -~,_ -'"'' SIZED TO HANDLE 18.30 ACRES OF RUNOFF. WITH THIS REVISION, THE -_ _ - --------------- •- TOTAL DRAINAGE AREA TO SB-11 IS NOW 14.72 AC. THIS IS THE OPINION PORTABLE `` _ -_. ----------- TOILETS `''`o, "--, _____ _ OF THE ENGINEER THAT THE SEDIMENT BASIN REMAINS ADEQUATELY -_ SIZED. - _ _ ---- - _ ¢,S,p _ - PROP. `'siSs DD _- ------ _--__ ,�'`� _-"-. 1\t \\ `.\ `,\ f• ����t \\ \\ \ `` ��QV _ `"DUMPSTER -- "-__ -- - __ _. _ ---- --- ` ---------------------------------------- ------ --� --__ �r�r •----- \ \ 1 1 ` `♦ \ \ r , I —_ _---____-___ .ram __-__'• _____-- _-,---,�,,.�o�._r ..",_--_-_-••_ - _- .. -_-_ �.+ _--�- 44p _ ST-413 - ------------------ ------ 442 UT ------------ -„-„--__' �2:1 \� ~1 , i.i•y. V r ";' �'"aYt'i" imp 1�2 •i r.% _ L . -------------- ------------------ _ ----- __•-.__- ------ ----' ----------------- ---- ------------- EXISTING ENTRANCE TO BE TEMPORARILY UTILIZED AS PAVED- ---- _ t CONSTRUCTION ENTRANCE WITH WASH OUT DISCHARGING TO ST-4B `\\\ ' FOR TREATMENT UNTIL ROAD CONSTRUCTION OF ARCHER AVENUE y: �\ \ ` - — — —\I — — ' ' '-=----�--- — — — --------------- , HAS BEGUN AND ARCHER 4S THEN UTILIZED AS CONSTRUCTION ENTRANCE. \ I — _ — — — — _= �_ _ — — — — '_ - 00► l9! ' / / —-�'•--- -_-�---�i 40 20 10 0 40 0' PROJECT: VIRGINIA STORMWATER MANAGEMENT PLAN FOR BROOKHILL ]BLOCKS 4A AND 4B APARTMENTS — AMENDMENT I LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMAIRLE COUNTY, VA BOHLER ENGINEERING 28 BLACKWELL PARK LANE, SUITE 201 WARRENTON, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540) 349-0321 VA@BohlerEng.com LTH pA `i Q V R NYA R .p Lic. No. 0402056625 6/19/19 `t1� SHEET TITLE: --1144 EROSION Il ROS ION & SEDIMENT CONTROL PLAN PHASE 1 v SHEET NUMBER H:\15\VI52000\DRAWINGS\PLAN SETS\SECTION 1\BLOCK 4A AND 4B - FINAL SITE PLAN\WPO - BLOCK 4A AND 4B\V752000OA1.DWG PRINTED BY: DREARDON 6.19.19 @ 6:27 PM LAST SAVED BY: JCRUZ EROSION CONTROL MINIMUM STANDARDS MINIMUM STAN DARDS: MS-1: PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE (1) YEAR. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION X. STABILIZATION. MS-2: DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THE APPLICANT RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE. ACTION: STOCKPILES SHALL COMPLY WITH MS-2 BY PROVIDING SILT FENCING AROUND THE BASE OF THE STOCKPILE. TEMPORARY SOIL STABILIZATION MEASURES NOTED IN MS-1 ABOVE SHALL APPLY. MS-3: A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE STABILIZED. PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT, IS UNIFORM, MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION X. STABILIZATION, MS-4: SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION VIII. SEQUENCE OF CONSTRUCTION, PHASE 111. MS-5: STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIC)NS IMMEDIATELY AFTER INSTALLATION. ACTION: EARTHEN STRUCTURES SHALL BE STABILIZED USING TEMPORARY SOIL STABILIZATION MEASURES AS NOTED IN MIS-1 ABOVE SHALL APPLY. MS-6: SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN. a. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND T'HE TRAP SHALL ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES. b. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUTAL TO THREE ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN TIHE STRUCTURAL INTEGRITY OF THE BASIN DURING A TWENTY-FIVE YEAR STORM OF 24-HOUR DURATION, RUNOFF COEFFICIENITS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED 'TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED. ACTION: THE BASINS HAVE BEEN DESIGNED TO ACCOUNT FOR THE ENTIRE DRAINAGE AREA CONTRIBUTING TO THEM. TIHE APPROPRIATE SIZING AND STORM CRITERIA HAVE BEEN USED IN THE DESIGNS. MS-7: CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE ERODING EXCESSIVELY WITHIN ONE (1) YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED. ACTION: THE CONTRACTOR SHALL STABILIZE THE ULTIMATE CUT AND FILL SLOPES AS FINAL GRADES ARE REACHED. MS-8: CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE. ACTION: THERE ARE NO PROPOSED CONCENTRATED FLOW AREAS WHICH ARE NOT STABILIZED. MS-9: WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED. ACTION: ACKNOWLEDGED. THE CONTRACTOR SHALL IDENTIFY AND ADDRESS ANY WATER SEEPAGE AREAS. MS-10: ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT. ACTION: ACKNOWLEDGED. MS-11: BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IIN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL. ACTION: ACKNOWLEDGED. MS-12: WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NON -ERODIBLE MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE STRUCTURES IF ARMORED BY NON -ERODIBLE COVER MATERIALS. ACTION: ACKNOWLEDGED, THE CONTRACTOR SHALL BE RESPONSIBLE TO MINIMIZE ANY ENCROACHMENT INTO THE EXISTING STREAMS AND WATERCOURSES. MS-13: WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX (6) MONTH PERIOD, A TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF NON -ERODIBLE MATERIALS SHALL BEE PROVIDED. ACTION: ACKNOWLEDGED. MS-14: ALL APPLICABLE FEDERAL, STATE, AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET. ACTION: ACKNOWLEDGED. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING THE NECESSARY PERMITS FOR LIVE WATERCOURSE CROSSINGS. MS-15: THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED. ACTION: ACKNOWLEDGED. MS-16: UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION) TO OTHER APPLICABLE CRITERIA: a. NO MORE THAN 500 LINEAR FEET OF TRENCH SHALL BE OPENED AT ONE TIME. b. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES. c. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH AN APPROVED SEDIMENT TRAPPING') DEVICE, OR BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFFSITE: PROPERTY. d. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND) PROMOTE STABILIZATION. e. RE -STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS. f. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH. ACTION: ACKNOWLEDGED. MS-17: WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER LAND -DISTURBING ACTIVITIES. ACTION: SEE EROSION AND SEDIMENT CONTROL NOTES, NUMBER 10. MS-18: ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. ACTION: ACKNOWLEDGED. MS-19: PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA: a. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFORMED. b. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER: (1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF THE PROJECT IN QUESTION; OR (2) (a) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO (2) YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP CHANNEL BANKS NOR CAUSE EROSION OF CHANNEL BED OR BANKS; AND (b) ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS SHALL BE ANALYZED BY THE USE OF A TEN (10) YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP ITS BANKS BY THE USE OF A TWO (2) YEAR STORM TO DEMONSTRATE THAT STORMWATER WILL NOT CAUSE EROSION OF CHANNEL BED OR BANKS; AND (c) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A TEN (10) YEAR STORM TO VERIFY THAT STORMWATER WILL BE CONTAINED WITHIN THE PIPE OR SYSTEM. c. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE APPLICANT SHALL: (1) IMPROVE THE CHANNEL TO A CONDITION WHERE A TEN (10) YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO (2) YEAR STORM WILL NOT CAUSE EROSION TO THE CHANNEL BED OR BANKS; OR (2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN (10) YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES OR (3) DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TWO (2) YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A NATURAL CHANNEL OR WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TEN (10) YEAR STORM TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR (4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORMWATER DETENTION OR OTHER MEASURE WHICH IS SATISFACTORY TO THE PLAN -APPROVING AUTHORITY TO PREVENT DOWNSTREAM EROSION. d. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS. e. ALL HYDROLOGIC ANALYSES SHALL BE CASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT OF THE SUBJECT PROJECT. f. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORMWATER DETENTION THEY SHALL OBTAIN APPROVAL FROM THE LOCALITY OF A PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE. g. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATERS SHALL BE PLACED AT THE OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE CHANNEL. RECEIVING FACILITY TO THE h. ALL ON -SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE. i. INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIPE SYSTEM, OR TO A DETENTION FACILITY. j. IN APPLYING THESE STORMWATER RUNOFF CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL DEVELOPMENT SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION SHALL BE USED IN ALL ENGINEERING CALCULATIONS. k. ALL MEASURES USED TO PROTECT PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE. ACTION: SEE EROSION AND SEDIMENT CONTROL NARRATIVE, SECTION XI. STORM WATER RUNOFF CONSIDERATIONS. EROSION AND SEDIMENT CONTROL NARRATIVE 1. PROJECT DESCRIPTION: THE SUBJECT SITE IS LOCATED WITHIN THE BROOKHILL DEVELOPMENT ALONG US ROUTE 29 SEMINOLE TRAIL ROAD. THE SITE IS SPLIT INTO TWO SEPARATE AREAS BY ARCHER AVE., WHICH PROVIDES ACCESS TO THE SITE FROM SEMINOLE TRAIL ROAD, THE TOTAL DISTURBED AREA FOR THE WORK PROPOSED WITH THIS PLAN IS 14.32 ACRES. THE PURPOSE OF THIS PROJECT IS TO DEVELOP BLOCK 4 BY CONSTRUCTING TWO MULTIFAMILY LIVING AREAS THAT WILL BORDER ARCHER AVE. AS PART OF THIS DEVELOPMENT A TOTAL OF TWELVE (12) STRUCTURES ARE PROPOSED, NINE (9) APARTMENT BUILDINGS, ONE (1) CLUBHOUSE, ONE (1) FITNESS BUILDING, AND ONE (1) MAINTENANCE BUILDING, AS WELL AS A COMMUNITY SWIMMING POOL. TO SERVICE THE PROPOSED DEVELOPMENT THIS PLAN WILL ALSO INCLUDE THE INSTALLATION OF SANITARY SEWER, WATER LINES, AND STORM INFRASTRUCTURE THAT WILL SERVE THE PROPOSED PARKING AREAS. THERE WILL ALSO BE THREE (3) STORMWATER BMPs CONSTRUCTED WITH THIS PLAN, ONE (1) DETENTION POND WITH A CDS PRETREATMENT STRUCTURE, ONE (1) LEVEL SPREADER, AND ONE (1) EXTENDED DETENTION POND WITH AN ISOLATOR ROW PRETREATMENT STRUCTURE. THE TOTAL PROJECT IS ANTICIPATED TO TAKE NINE (9) TO TWELVE (12) MONTHS TO COMPLETE. II. EXISTING SITE CONDITIONS: CURRENTLY NO DWELLINGS EXIST ON THE TWO PROPOSED PARCELS CARVED OUT BY THE NEWLY CONSTRUCTED ARCHER AVE AND STELLA LANE, AND THE EXISTING ROUTE 29. A PORTION OF THE SITE HAS BEEN PREVIOUSLY ROUGH GRADED TO ALLOW FOR THE INSTALLATION AND GRADING TIE OUT OF THE ROADS MENTIONED ABOVE. THE REMAINING UNDISTURBED PORTIONS OF THE SITE ARE PRIMARILY ROLLING TERRAIN WITH SLOPES THAT RANGE FROM APPROXIMATELY 1% TO 68%. THE TWO PROPOSED PARCELS WITHIN THIS PLAN DO NOT CONTAIN AREAS OF THE 100-YEAR FLOODPLAIN, AND NO WETLANDS OR STREAM CORRIDORS ARE IDENTIFIED. III. ADJACENT PROPERTY: THE SITE IS BORDERED TO THE NORTH BY CONSERVED OPEN SPACE/GREENWAY AND AN UNNAMED STREAM, TO THE EAST BY A SECTION OF STELLA LANE, TO THE SOUTH BY PARCEL 8A, AND TO THE WEST BY SEMINOLE TRAIL, ROUTE 29. IV. OFFSITE AREAS: THE PROPOSED PROJECT HAS BEEN DESIGNED TO MINIMIZE THE IMPORT AND/OR EXPORT OF DIRT FOR THE SITE. HOWEVER, IT IS ANTICIPATED THAT THERE WILL BE EXCESS CUT GENERATED DURING CONSTRUCTION THAT WILL NEED TO BE TRANSPORTED TO AREAS WITHIN THE PROPOSED DEVELOPMENT THAT WERE INCLUDED IN THE PREVIOUSLY APPROVED WPO PLAN #WPO201700037. THE CONTRACTOR IS RESPONSIBLE FOR COORDINATING ANY DISTURBANCE OFFSITE AND FOR ANY REQUIRED PLANS AND PERMITS THAT MAY BE REQUIRED. V. SOILS: A GEOTECHNICAL STUDY HAS NOT BEEN PERFORMED AT THIS TIME. A STUDY WILL BE PREPARED AT A FUTURE DATE. PER THE USGS WEB SOIL SURVEY, THE SOILS OF BLOCKS 4A AND 46 ARE ENTIRELY HSG B. THE ONLY OTHER SOILS RELEVANT TO THIS PLAN ARE HSG D SOILS, LOCATED ADJACENT TO AND SOUTH OF POLO GROUNDS ROAD, AT POI 11, AS SHOWN IN THE STORMWATER COMPLIANCE CALCULATIONS. VI. CRITICAL AREAS: THERE ARE SEVERAL EXISTING CRITICAL AREAS ON THE SITE INCLUDING A HISTORICAL AREA THAT CONTAINS A CEMETERY. SEVERAL STREAM CORRIDORS TRAVERSE THE SITE AND INCLUDE WETLANDS AND MAPPED 100-YEAR FLOODPLAINS. APPROPRIATE MEASURES HAVE BEEN BUT INTO PLACE TO MINIMIZE THE IMPACT TO ALL CRITICAL AREAS THAT ARE IN CLOSE PROXIMITY TO THE PROPOSED PROJECT AREA ASSOCIATED WITH THIS PLAN. VII. EROSION AND SEDIMENT CONTROL MEASURES: UNLESS OTHERWISE NOTED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (VESCH). THE MINIMUM STANDARDS OF VESCH SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. SPECIFIC EROSION AND SEDIMENT CONTROL MEASURES UTILIZED IN THIS PROJECT INCLUDE THE FOLLOWING: 1. CONSTRUCTION ENTRANCE - 3.02 A STABILIZED STONE PAD WITH FILTER FABRIC UNDERLINER LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. 2. SILT FENCE - 3.05 A PROTECTIVE BARRIER TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. 3. SUPER SILT FENCE - N/A REINFORCED SILT FENCE TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PRESENT SEDIMENT FROM LEAVING THE SITE. 4, STORM DRAIN INLET PROTECTION - 3.07 A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. 5. CULVERT INLET PROTECTION - 3.08 A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS. 6. TEMPORARY DIVERSION DIKE - 3.09 A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. 7. TEMPORARY RIGHT-OF-WAY DIVERSION - 3.11 A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. 8. TEMPORARY SEDIMENT TRAP - 3.13 A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. 9. TEMPORARY SEDIMENT BASIN - 3.14 A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. 10.OUTLET PROTECTION - 3.18 STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVES CHANNEL SECTIONS. 11. TEMPORARY SEEDING - 3.31 THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON A DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. 12. PERMANENT SEEDING - 3.32 THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. 13. TREE PRESERVATION AND PROTECTION - 3.38 PROTECTION OF DESIRABLE TREES FROM MECHANICAL AND OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. 14. DUST CONTROL - 3.39 REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. ALL MATERIALS INDICATED ON THESE PLANS SHALL CONFORM TO THE SPECIFICATIONS AND INSTALLATION GUIDELINES SET FORTH IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (LATEST EDITION), AND THE DETAILS AND SPECIFICATIONS SHOWN HEREIN. VIII. SEQUENCE OF CONSTRUCTION: PHASE IA r 1. OBTAIN ALL REQUIRED PERMITS. 10 2. ATTEND PRE -CONSTRUCTION MEETING. 3. CONTRACTOR SHALL CONTACT JURISDICTION AT LEAST 1 WEEK PRIOR TO COMMENCING CONSTRUCTION. W 4. CONTRACTOR SHALL STAKE AND FLAG LIMITS OF DISTURBANCE. 5. CONTRACTOR TO INSTALL ALL PERIMETER CONTROLS AND PERFORM GRADING SHOWN IN PHASE I -A TO INSTALL THE CONSTRUCTION ENTRANCES PRIOR TO THE START OF ANY MASS EARTH MOVING ACTIVITIES. 6. CONTRACTOR TO PERFORM THE MODIFICATIONS TO THE EXISTING EXTENDED POND SHOWN IN PHASE I -A OF THE EROSION AND SEDIMENT CONTROL PLAN. CONTRACTOR TO LEAVE PORTION OF EXISTING POND FENCE ALONG ROUTE 29 IN PLACE DURING CONSTRUCTION UNTIL POND MODIFICATIONS ARE COMPLETE AND PROPOSED FENCE IS READY TO BE INSTALLED. 7. CONTRACTOR TO UTILIZE EXISTING TEMPORARY SEDIMENT BASIN SB-11, BUILT WITH PLANS ASSOCIATED WITH WPO201700037, AS SHOWN IN PHASE I -A OF THE EROSION AND SEDIMENT CONTROL PLAN. 8. CONTRACTOR TO INSTALL TEMPORARY SEDIMENT TRAPS ST-4B, AND ST-41C. T BEGIN MASS EARTHWORK OPERATION T REACH PROPOSED PAD ELEVATIONS. A THE EARTHWORK 9. CONTRACTORO S O 0 S OPERATION I BEING PERFORMED CONTRACTOR T ENSURE THAT ALL TEMPORARYDIVERSIONS ARE MAINTAINED T KEEP O S E G C AC R O U 0 . RUNOFF DIRECTED TO THE EROSION AND SEDIMENT CONTROL MEASURES SHOWN IN PHASE I -A OF THE EROSION AND SEDIMENT CONTROL PLAN. 10. CONTRACTOR TO PROVIDE TEMPORARY SEEDING AND DUST CONTROL OF ALL DISTURBED AREAS AS NEEDED. NOTE: CONTRACTOR SHALL NOT COMMENCE PHASE I-B THE EROSION AND SEDIMENT CONTROL PLAN PRIOR TO THE COUNTY EROSION AND SEDIMENT CONTROL INSPECTORS APPROVAL AND COMPLETION OF ALL PHASE I CONSTRUCTION. Y PHASE16 1. CONTRACTOR T0 CONSTRUCT THE PROPOSED TEMPORARYSEDIMENT BA IN SB-4A AND INSTALL TEMPORARY SEDIMENT TRAP ST-4A AS SHOWN IN PHASE I-B OFTHE EROSION AND SEDIMENT CONTROL PLAN IN ORDER TO CAPTURE ADDITIONAL RUNOFF DUE TO NEWLY CONSTRUCTED ROAD. 2. CONTRACTOR TO CONTINUE MASS EARTHWORK OPERATION TO REACH PROPOSED PAD ELEVATIONS. AS THE EARTHWORK OPERATION IS BEING PERFORMED CONTRACTOR TO ENSURE THAT ALL TEMPORARY DIVERSIONS ARE MAINTAINED TO KEEP RUNOFF DIRECTED TO THE EROSION AND SEDIMENT CONTROL MEASURES SHOWN IN PHASE I OF THE EROSION AND SEDIMENT CONTROL PLAN. 3. CONTRACTOR TO PROVIDE TEMPORARY SEEDING AND DUST CONTROL OF ALL DISTURBED AREAS AS NEEDED. '► NOTE: CONTRACTOR SHALL NOT COMMENCE PHASE 11 OF THE EROSION AND SEDIMENT CONTROL PLAN PRIOR TO THE COUNTY EROSION AND SEDIMENT CONTROL INSPECTORS APPROVAL AND COMPLETION OF ALL PHASE I CONSTRUCTION. PHASE II 1. CONTRACTOR TO INSTALL REMAINING UTILITIES ON SITE INCLUDING PROPOSED WATERLINE, SANITARY MAIN, AND STORM SEWER. 2. CONTRACTOR TO INSTALL STORM INLET PROTECTION IMMEDIATELY AFTER PROPOSED STORM INLETS ARE INSTALLED. 3. CONTRACTOR TO BEGIN CONSTRUCTION OF THE PROPOSED BUILDINGS. 4. CONTRACTOR TO CONSTRUCT THE REMAINING CURB AND GUTTER FOR THE PARKING AREAS. 5. CONTRACTOR TO INSTALL THE PROPOSED ISOLATOR ROW. 6. CONTRACTOR TO BASE PAVE THE PARKING AREAS. 7. CONTRACTOR TO INSTALL THE PROPOSED BIORETENTION FACILITY. 8. CONTRACTOR TO INSTALL ALL PROPOSED SIDEWALKS. 9. CONTRACTOR TO PERMANENTLY SEED ALL DISTURBED AREAS AS SOON AS FINAL GRADE IS MET. NOTE: THE COUNTY E&S INSPECTOR SHALL APPROVE PREVIOUS PHASE PRIOR TO THE NEXT PHASE COMMENCING. IX. MAINTENANCE PROGRAM: 1. TEMPORARY STONE CONSTRUCTION ENTRANCE - 3.02 - THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO PUBLIC RIGHTS -OF -WAY, THIS MAY REQUIRE PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR AND/OR CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY. THE USE OF WATER TRUCKS TO REMOVE MATERIAL DROPPED, WASHED, OR TRACKED ONTO ROADWAYS WILL NOT BE PERMITTED UNDER ANY CIRCUMSTANCES. 2. SILT FENCE - 3.05 - SILT FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY. - CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCES RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY - SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN THE LEVEL OF DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIERS. - ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED AND SEEDED. 3. SUPER SILT FENCE - N/A - SILT FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY. - CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCES RESULTING FROM END RUNS AND UNDERCUTTING. - SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. - SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN THE LEVEL OF DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIERS. - ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED AND SEEDED. 4. STORM DRAIN INLET PROTECTION - 3.07 - THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED. - SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DESIGN DEPTH OF THE TRAP. REMOVED SEDIMENT SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE. - STRUCTURES SHALL BE REMOVED AND THE AREA STABILIZED WHEN THE REMAINING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED. 5. CULVERT INLET PROTECTION - 3.08 - THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED. - AGGREGATE SHALL BE REPLACED OR CLEANED WHEN INSPECTION REVEALS THAT CLOGGED VOIDS ARE CAUSING PONDING PROBLEMS WHICH INTERFERE WITH ON -SITE CONSTRUCTION. - SEDIMENT SHALL BE REMOVED AND THE IMPOUNDMENT RESTORED TO ITS ORIGINAL DIMENSIONS WHEN SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH. REMOVED SEDIMENT SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE AND CAUSE SEDIMENTATION PROBLEMS. - TEMPORARY STRUCTURES SHALL BE REMOVED WHEN THEY HAVE SERVED THEIR USEFUL PURPOSE, BUT NOT BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY STABILIZED. 6. TEMPORARY DIVERSION DIKE - 3.09 - THE MEASURE SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET OR SEDIMENT TRAPPING FACILITY, AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 7. TEMPORARY RIGHT-OF-WAY DIVERSION - 3.11 - THE PRACTICE SHALL BE INSPECTED AFTER EVERY RAINFALL AND REPAIRS MADE IF NECESSARY. AT LEAST ONCE EVERY TWO WEEKS, WHETHER A STORM HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. RIGHT-OF-WAY DIVERSIONS, WHICH ARE SUBJECT TO DAMAGE BY VEHICULAR TRAFFIC, SHOULD BE RESHAPED AT THE END OF EACH WORKING DAY. 8. TEMPORARY SEDIMENT TRAP - 3.13 - SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DESIGN VOLUME OF THE WET STORAGE. SEDIMENT REMOVAL FROM THE BASIN SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE AND CAUSE SEDIMENTATION PROBLEMS. - FILTER STONE SHALL BE REGULARLY CHECKED TO ENSURE THAT FILTRATION PERFORMANCE IS MAINTAINED. STONE CHOKED WITH SEDIMENT SHALL BE REMOVED AND CLEANED OR REPLACED. - THE STRUCTURE SHOULD BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. THE HEIGHT OF THE STONE OUTLET SHOULD BE CHECKED TO ENSURE THAT ITS CENTER IS AT LEAST 1 FOOT BELOW THE TOP OF THE EMBANKMENT. 9. TEMPORARY SEDIMENT BASIN - 3.14 - THE BASIN EMBANKMENT SHOULD BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUNDS AND HAS NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. - THE EMERGENCY SPILLWAY SHOULD BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION -RESISTANT. - THE BASIN SHOULD BE CHECKED AFTER EACH RUNOFF -PRODUCING RAINFALL FOR SEDIMENT CLEANOUT. WHEN THE SEDIMENT REACHES THE CLEAN -OUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 10. ALL SEEDED AREAS SHALL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 11. NO AREA SHALL BE LEFT DENUDED FOR ANY PERIOD LONGER THAN SEVEN (7) DAYS. 12. NO UNPROTECTED, UNDISTURBED AREA SHALL DRAIN TO ROADWAY PAVEMENTS SUCH THAT THE SUBBASE, BASE, OR WEARING SURFACE ARE CONTAMINATED BY SILT TRAPPED AT LOW POINTS OR INLETS. 13. ADJACENT ROADWAYS AND ENTRANCES WILL BE KEPT CLEAN FROM ACCUMULATED DEBRIS AT ALL TIMES. 14. MONITORING REPORTS WILL BE SUBMITTED TO ALBEMARLE COUNTY BY THE RESPONSIBLE LAND DISTURBER. X. STABILIZATION: TEMPORARY SEEDING WILL BE PROVIDED IN ACCORDANCE TO VESCH REQUIREMENTS THROUGHOUT CONSTRU CTION, FINAL SEEDING AND SODDING INSTALLATION PER THE SPECIFICATIONS PROVIDED ON SHEET C-617 WILL OCCUR ONCE THE SITE HAS BEEN FINAL GRADED AND THE IMPROVEMENTS ARE COMPLETE, XI. STORMWATER RUNOFF CONSIDERATIONS: REFER TO SHEETS C-900 TO C-905 FOR STORMWATER RUNOFF CONSIDERATIONS. XII. CALCULATIONS: REFER TO SHEETS C-900 TO C-905 FOR STORMWATER RUNOFF CONSIDERATIONS. XII1. OTHER IMPORTANT NOTES: 1. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLANS SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 2, PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NOT SHOWN HEREON THAT ARE DEEMED NECESSARY BY THE APPROVING AUTHORITY AND/OR SITE INSPECTOR. 4, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING AND GRADING. 5. THE CONTRACTOR SHALL PROVIDE ADEQUATE MEANS OF CLEANING MUD FROM TRUCKS AND/OR OTHER EQUIPMENT PRIOR TO ENTERING THE PUBLIC RIGHT-OF-WAY. WATER TRUCKS SHALL BE UTILIZED IN THE EVENT THAT A PUBLIC WATER SOURCE IS NOT AVAILABLE. IT IS THE CONTRACTOR'S RESPONSIBILITY TO CLEAR THE STREETS AND TAKE WHATEVER MEASURES NECESSARY TO ENSURE THAT THE STREETS ARE MAINTAINED IN A CLEAN AND DUST -FREE CONDITION AT ALL TIMES. 6. IT SHALL BE THE CONTRACTOR'S RESPONSIBILITY TO PERFORM THE WORK IN SUCH A MANNER AS TO PREVENT THE WASHING OF ANY TOPSOIL OR DEBRIS ONTO ADJACENT PROPERTIES. 7. THE CONTRACTOR SHALL ENSURE THAT ALL DEWATERING OPERATIONS ON THE SITE PASS THROUGH AN APPROVED EROSION AND SEDIMENT CONTROL SUCH DEVICE S FENCING, f U AS SILT L ENC NG SEDIMENT TRAP FILTER S OR SEDIMENT NT E IL ER BAGS EROSION AND SEDIMENT CONTROL NOTES 1. UNLESS OTHERWISE NOTED, ALL VEGETATIVE AND EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED IN ACCORDANCE WITH THE MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK (LATEST EDITION). 2. FOR ADDITIONAL DETAILS AND SPECIFICATIONS NOT SHOWN HEREON, REFER TO THE LATEST EDITION OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 3. ALL EROSION CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING AND GRADING. 4. ALL AREAS TO BE PAVED MAY BE STABILIZED BY INSTALLATION OF BASE AND SUBBASE MATERIALS INSTEAD OF TEMPORARY VEGETATION COVER. 5. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON -SITE AT ALL TIMES. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES AS NECESSARY TO PREVENT POSSIBLE FUTURE OFF -SITE CONTAMINATION. 7. THE CONTRACTOR SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL DEVICES DAILY. ANY DAMAGED CONTROLS SHALL BE REPAIRED OR REPLACED BY THE CLOSE OF EACH WORKING DAY. 8. THE CONTRACTOR MUST NOTIFY THE LANDSCAPING SUPERVISOR PRIOR TO THE INSTALLATION OF ANY TREE PROTECTION OR PLANT MATERIAL. 9. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN THOSE INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 10.THE CONTRACTOR SHALL PROVIDE ADEQUATE MEANS OF CLEANING MUD FROM TRUCKS AND/OR OTHER EQUIPMENT PRIOR TO ENTERING THE PUBLIC RIGHT-OF-WAY. IT IS THE CONTRACTORS RESPONSIBILITY TO TAKE MEASURES NECESSARY TO ENSURE THAT ADJACENT STREETS ARE MAINTAINED IN A CLEAN AND DUST -FREE CONDITION AT ALL TIMES. 11.THE CONTRACTOR SHALL ENSURE THAT ALL DEWATERING OPERATIONS ON THE SITE PASS THROUGH AN APPROVED EROSION AND SEDIMENTCONTROL DEVICE SUCH AS SILT FENCING, SEDIMENT TRAPS, OR SEDIMENT FILTER BAGS. 12. THE CONTRACTOR IS RESPONSIBLE FOR PERFORMING SITE WORK IN SUCH A MANNER AS TO PREVENT THE WASHING OF ANY TOPSOIL OR DEBRIS ONTO THE ADJACENT PROPERTIES. 13.ALL STORM AND SANITARY SEWER LINES, NOT IN STREETS, SHALL BE SEEDED AND MULCHED WITHIN 14 DAYS AFTER BACKFILL. 14.ELECTRICAL POWER, GAS SUPPLY, AND TELEPHONE TRENCHES SHALL BE COMPACTED, SEEDED, AND MULCHED WITHIN 14 DAYS AFTER BACKFILL. 15. AT THE COMPLETION OF CONSTRUCTION AND PRIOR TO ANY BOND RELEASE, ALL TEMPORARY SEDIMENT CONTROLS SHALL BE REMOVED AND ALL DENUDED AREAS STABILIZED. 16. WORK WITHIN THE RIGHT-OF-WAY SHALL BE PERFORMED IN A MANNER SO AS TO LIMIT THE DISTURBANCE TO PUBLIC TRAFFIC INCLUDING PEDESTRIAN AND BICYCLE ACCESS. (ALBEMARLE COUNTY GENERAL CONSTRUCTION NOTES FOR EROSION AND SEDIMENT CONTROL PLANS: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS, 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE, 9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS. 12, BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. '15.BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. "6.THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 117.TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BEAT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 118.PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED T 10 L - A 00 BS/ACRE AND CONSIST OF 10-20 10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 8OLBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 119. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL, ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY, 20.ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 21.THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.) 22.PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B.) W -IU - ff es~ W 0 E-I W z o 0 - w xz z( oLL LLI .e�� �gmWza62W0-4 WH _Jag�Z)_j zao �x�la-aonao a� p® 04 9 W a ♦***** � W � A W z g5 a za �IW�asWW)zg -_ g- (X0Z zza o 64 - LLI E.W7 JFm 25;Of .4304 ; u)u)m J IN Ig 0 OUw-Z 0¢OOw I V A �cn�mcnzc.� Z �U 9s >aa a Y g- W U 0 0 a a Hz 3:p w} Q . C) Wza2z>-= �> �c,7 zggYWD- ogUW W CxXs A¢wz�>� 0-,Lou gg (,a 8-Lu0www= 4xd Z)z00zzza g� z ****4 . El !� !iw 4� III �4M REVISIONS REV DATE COMMENT BY 1 9124118 COUNTY COMMENTS RTY 2 10/19/18 COUNTY COMMENTS RTY 3 4/8/19 AMENDMENT 1 RTY 4 5/13/19 AMENDMENT 1 COUNTY COMMENTS RTY 5 6/19/19 AMENDMENT 1 COUNTY COMMENTS RTY KNOW VVHAT'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.: ON1 PROJECT: VIRGINIA STORMWATER RMANAGEMEN FOR ]DDILDNO OKHILL '"BLOCKS 4A AND 4JB3 APAJLO JL MENTS LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA BOHLEk E N G I N E E R I N G 28 BLACKWELL PARK LANE, SUITE 201 WARRENTOIN, VIRGINIA 20186 Phone: (540) 349-4500 Fax: (540) 349-0321 VA@BohlerEng.com TH pi v RYAN YAUGER - y .0 Lic. No. 0402056625 ��6119/19 � c �ONAL �M4 SHEET TITLE: EIROSION & SEDIMENT NOTES SHEET NUMBER: C -204 H:\15\V152000\DRAWINGS\PLAN SETS\SECTION 10LOCK 4A AND 48 -FINAL SITE PLAN\WPO -BLOCK 4A AND 4BW152000ON1.DWG PRINTED BY: DREARDON 6.19.19 @ 6:27 PM LAST SAVED BY: JCRUZ SEDIMENT TRAP DESIGN e ST-413 Trap Drainage Storage Volume Dimensions Elevations Embankment Outlet Top Spillway ID Area (ac) Total "Wet" "Dry" "Wet" * L x W x D (ft) "Dry1, ** L x W x D (ft) Storage Trap Bottom (ft) Clean Out*** R Elev. (ft) Height H (ft) Height Ho R Width W (ft) Dimensions L x W (ft) Req. (Cy) Prov. (cy) Req. (Cy) Prov. (Cy) Req. (Cy) Prov, (Cy) "Wet" (ft) "Dry" (ft) ST-413 2.99 402 459 201 230 201 229 Variable Variable 442.00 444.00 440.00 441.00 445.00 3.0 2.0 2.5 18' x 14.5- * WET DIMENSIONS: LEINGTH AND WIDTH ARE AT BASE OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET DOWN TO BOTTOM OF TRAP. ** DRY DIMENSIONS: LEINGTH AND WIDTH ARE AT CREST OF STONE OUTLET, DEPTH IS MEASURED FROM BASE OF STONE OUTLET UP TO CREST OF STONE OUTLET. *** THE CLEAN OUT ELEVATION SHALL BE MARKED USING STAKE OR SPRAY PAINT ON THE RISER SEDIMENT TRAP DESIGN - ST-4C Trap Drainage Storage Volume Dimensions Elevations Embankment Outlet Top Spillway ID Area (ac) Total "Wet" "Dry" "Wet" * L x W x D R "Dry" ** L x W x D (ft) Storage Trap Bottom R Clean Out' (ft) Elev. (ft) Height H R Height Ho (ft) Width W (ft) Dimensions L x W (ft) Req. (Cy) Prrov. (+cy) Req. (Cy) Prov. (Cy) Req. (Cy) Prov. (Cy) "Wet" (ft) "Dry" (ft) ST4C 2.65 356 446 178 180 178 266 67 x 34 x 3 77 x 45 x 3 j 436.50 439.00 434.00 435.25 440.00 3.5 2.5 3.0 16' x 17.0' NOTES * WET DIMENSIONS: LENGTH AND WIDTH ARE AT BASE OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET DOWN TO BOTTOM OF TRAP. ** DRY DIMENSIONS: LENGTH AND WIDTH ARE AT CREST OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET UP TO CREST OF STONE OUTLET. *** THE CLEAN OUT ELEVATION SHALL BE MARKED USING STAKE OR SPRAY PAINT ON THE RISER SEDIMENT TRAP DESIGN e ST-4D Trap Drainage Storage Volume Dimensions Elevations Embankment Outlet Top Spillway ID Area (ac) Total "Wet" "Dry" "Wet" * L x W x D (ft) "Dry L x W x D (ft) Storage Trap Bottom (ft) Clean Out*** (ft) Elev. (ft) Height H R Height Ho (ft) Width W (ft) Dimensions L x W A Req. (Cy) Prov. (Cy) Req. (Cy) Prov. (Cy) Req. (Cy) Prov. (Cy) "Wet" (ft) "Dry" (ft) ST-4D 2.26 304 425 152 179 152 246 75 x 38 x 2 1 83 x 46 x 2 1 425.00 427.00 1 423.00 1 424.00 1 428.00 3.0 2.0 2.5 14' x 14.5' 1\ 11! MIN * WET DIMENSIONS: LENGTH AND WIDTH ARE AT BASE OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET DOWN TO BOTTOM OF TRAP. ** DRY DIMENSIONS: LENGTH AND WIDTH ARE AT CREST OF STONE OUTLET. DEPTH IS MEASURED FROM BASE OF STONE OUTLET UP TO CREST OF STONE OUTLET. *** THE CLEAN OUT ELEVATION I SHALL BE MARKED USING STAKE OR SPRAY PAINT ON THE RISER 1992 3.13 TEMPORARY SEDIMENT TRAP t' YARNBLE; ORIGINAL VARIABLE GROUND ELEV. - LD• 67 CU. YD./ACRE _ N VARIABLE 67 CU. YD./ACRE 41 MAX (EXCAVATED) FILTER CLOTH ORIGINAL ELEV. G ELEV. .SEE PLATE 3A3-1 COARSE AGGREGATE' CLASS I RIPRAP CROSS SECTION OF OUTLET CUSS I RIPRAP �- LENGTH (IN FEET) . 6 X DRAINAGE AREA (IN AC.) DIVERSION DIKE r SCOARSE AGGREGATE EXCAVATED r AREA FILTER CLOTH **COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) Source: Va. DSWC Plate 3.13-2 U � �W Z o3 sw 0�, Z �o Zk" °~ �� w-za�g� �a5<0� zoo al¢-°o „I fY cuc a, ...... wQz w� Ia H � Wo Z W ¢ �jWW aZ6 �(z Fes) �U W W W �¢�0 anal Q=wzz> L IL O O W 0 H U2 2=m 2T T g Z L c� H O F r- H- 2 rV�'1 viz woW¢ooW A jU)X mtgzU au�� a�P4 5P4a 0 W U o a z O w, ¢ W Z ¢ Z 2 > �C7W wxw"a `�.. HaZoZ,.00rW W �Q W�p �w n3 n33: r-a a W W W W Y w �zOmzzzEL Cn Q � a (n REVISIONS REV DATE COMMENT BY 1 7/3/18 JPS REVIEW SET RTY 2 7123/18 JPS REVIEW SET RTY 3 08/10/18 FIRM APPLICATION SET RTY 4 09/28/18 PERMIT REVIEW SET RTY 5 12/14/18 HUD CLOSING SET RTY 6 06/03/19 ASI #1 RTY KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. Its free. It's the law. APPROVED FOR CONSTRUCTION PROJECT No.: V152000 DRAWN BY: MEG CHECKED BY: RTY DATE: 6/3/2019 SCALE: NA CAD I.D.: ON2 PROJECT: FINAL SIDE ]PLAN FOR BROOKHILL LOCK 4A AND 413 APARTMENTS LOCATION OF SITE ROUTE 29 SIEMINOLE TRAIL RD AND STATE ROUTE 643 POLO GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA BOHLER 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 TH p�li u .p Lic. No. 0402056625 6/3/2019 � SHEET TITLE: IS EDIM ENT TRAPI AND BASIN DETAILS H:\15\V152000\DRAWINGS\PLAN SETS\SECTION 1\BLOCK 4A AND 4B -FINAL SITE PLAN\WPO- BLOCK 4A AND 4B\AMENOMENT I\V152000ON1.DWG PRINTED BY: DREARDON 6.19.19 C 6:27 PM LAST SAVED BY: DREARDON SHEET NUMBER: C-206A \\ '\ ,\ �, , , 1 - 1 1 1 \ \\\ ,\ I '♦ .� ; ^ -_ ..Y x f i t 7 a I r a,, ra 'f - - _ - - -. ._ ___- .1 EXTENC}ED DETENTION POND \\\\ ♦`\ ; I '� `\\\ \\ \\ \.�\ `� __ ( '', , , ��,,,,, ,�, - " -,�,, - ,,, F %, \ - t _ f 11 -- - - - %II _� % % VA DEQ STORMWATER DESKiN SPECIFICATION NO 5 \ \ I \ %\ , , \ \ . . I I ( I \ `` \ I I 1 1 \ \ %\ \ \\ I \ !. \% \ \ \ 1 1 '1 1. 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I C 1 I I. t \ I I / ✓ ✓ , / ✓ . / / / / I I , tta#i 13t n lecte d. I 1 , \ I IA / / ✓ / I r 1 __>__ I /' \ / �-, / {° �. - / C-O�•- �« r �oGA� afn r . tII 0 n' er ofow `ii .l �ril LiI 1 I \ 1 / 1 �•t.: ,,,,,,,wmob�'' .... trY g t persox>III{el. Aess o jx� ?ponds abslltild b0 CoIV6i1Cd ` ;, ' easement to allow inspection � � � � `i \\ ` ;� f � � /r� -� � ••� � ` 44B � �T' I � 1- T- i~T' i - I I ;' 1 I I I I 'I ', y } % and InaintCll71n0 :; I i 1 \ � I i 1 " i , /! l �,I+tsa i '� .. >•�� � , ' -/ - \% rl I I , I 1 1 I jt .is:`r{i30 # 1 +fl' I1I1n t :1(>Gi `8' fYl6ttt 1nC' `. 6 •yY� ail %# t I , I , i I I / i i ,� r / ,>t 4j� _ �.�` ` / , r III / I I .,... •;:'-.' ..;''' '... , I ,. I I. \ / / I / 1 / I Sty++ar �'� : 'i- ,% "i- ' ' , i' I I / - � I I ?,: I I I I I I I I I I I I i W ei 1 1 1 t I , o I / zx- �. - Catl perform inspection at maintenance serv{�e3* 8S wi'�1 � i7t{n�t{t � �' aWtl�° .� I I � i i � i / ' i I - � t / local or state as$isowbo' to �Ivo �0ii nuisat�r!i Pl sb! [� Wit:#ttt111 �L 900* I I I � / � �`'�� �`� , I {nvasyvc plant$,, vtgotativ mamgemc�nt and besvver �aavaL P PQ i�"w"dIt '' fJ J�isbitown � (2004) provides some OXCellcnt tcmptatn'''Of hQW to respond to thw. I ' I \ I I I ; _ I r 1 , � 1 r / , / ✓ , / pI9(yblems. I I - -- -_ 1 / !I ; I I t \ / , ; / '' ; / 1 I 1\ I I. 1 I / /' / 9.2• Maintenanoe %ti�1 �01�$ 1 i , 1\ /11 if/ 1 I 1 / ,I , r i /f I - - > / I i `\ I 11 i � , ✓ i � _ � ' ��- ` / rt i I ,,I I I}' I I � ;� a I , / .., „�_ , 11 I , %\ ,, t I / I 1 . 1 1 II I I [[ II \ I 1 V i ` , , ivalllte>� pi is ,Jlt dev a ' at{nual utspeetlnas that Il +i+ih* tl>ic rendition atttj 1 I l i i i - 1 / /' J !I I b I 1 _. 1 z I 464 petfor lanoc o the # eu�xt�7�-*e following: I 1 I I t i / � � � rr i - i i � i 11 I I I (1 _ -I I j- m ------ � � , 1 I I I " `�'` _ / , , 1 II -I- _ ! I 11 - _ _ / f 468 I , , I / I r i / / �`-- _ t , / r I It 1 1 t - 11 t `- � ` I 'K - k: I r �, V .+•► .. -%F-. '�' �.:•-•_ _..- - - -.,,_ I ,/ 1 / _ / t /t i -`".� : - I , j , _, 1_ _If ....I L ! , II - - -11 1 �► ` `. `\ 1 ,'"`.."`"' II ., f • Measure sediment acoulnulattcsa.le�vBIs'an for+mba�',, - 4 - I - -t.. _ 1_ I / 1 ' / 1 -- - -- � PS` I i !1 I 1 - I _ _ it � • ', \\ 70 -•-' % / t� _ ------ ` ` / 4 • Monitor the growth .of wedands, trees and sjlm s planted. Record the species and their I I 1 ! 1 7`- - f - ��`- -sue // - -------------- ! _ 1 ! I ! ! !' ,1 - ---- %\\ \` I ( / a;�i {ati� ooveragief 86d i d t `•P K" 'Y ijYC 7 %& I I t If / � / r 1 I r f r , 1 , I - - - +"" - I i! I I �`, ` ` \ 1 i r • 'd the cCilld#tt(?Y1 of '8'tQl�l3ti.** jnleft ,Ib :die # y , 1 \ v r r t t / 1 t I t r t r i - 1 I _ _ , lk \ \ \ \ ' - - - - - - _ . 1�. _`_--_ ___ :Ig�Y� I ! ! 0 !I I I _ « I' ,r - - T I 1 I i i / / I / / 1UyY yp. �,y.�,�t� , i 1 f --- - _ 11 ! t 1 11 - �' I 1 I : 1 1 I , , , / / I I WY ,n �IQC�TT. r ------- - -- I _ •I r ., I .,,.�� % I - 1 I , / I , I ------- -'1- ' I 11 I• I I 1 I I Y I 4� .w3..� i1 ryr� [f it ! I I t / / % % /' % / -1 __ - ---*'-- !' ' 1 !, _ 11 ' 1. I I I , 1 ,,- \\ \ 1 •01+1?h 1.,8, April 13, G7d�Q:, Page�1'F i���I I I - I / I I I / / I /./ / /�.. � � I 1 1 1 h1 - t I 1 1�+b"-I�^_ I \ \% I ,,% - I �- r - - - - / 1 / / 10 YR WSE 443.7 % -. . 1 I ! 11� t 1 I I 1 , \ \ 1 / , I VA DEC STORMWA*(tR D IGN SPECIFICATION NO It OftNbED CtE719TION POND ; .._ � -i- I 7` - - ' ' 1 / I ! � % ! / ; / � '1 1 ! 1 i i 4 1 � 1 I , I% \% Y% , \ ,- �, /,1 /� / rt- '-ri _. 2 YR WSE = 442. / j +� I I; ! I I , , !I I I 1 1 1 ' ' \ ` \ 1 / \ , , , 1 / I I / , -_ I. I 1,1 ,, III 1 I 1 ' } I / `\ ✓ 1 l I I I , I / 17�- , t1 1 1 p 00 YR WSEL = 444J15 t , / , ,' I J , ,' i t YR WSE = 442.44 N �'- - -- - .I i ,. Ii li ! 1 } I i I 11 I I ♦ " Tom,, �r / =7 j.,,�t. "wpm rY �+�,r a q. f �"� ,,1 , , , I / I 1 1 _ t--11' I 1 i p II 11 j 1 r 1 , 1 / #,J11b'�.:'M+,'t;! t +1% ! I „�,. * !,.,�Y�: �, " TM�M!'�.. ch fY,r ,r�,, ��%r►M-Sr. \+i, 1, •,��. �1�� , . , - I ' t l I 1 , r 1 I• 1 I I , _ , 1 I l l / I // I / ', ti 1' ! I 11, 1 1 I 10 YR WSE 443.761 I 11 I I ' i bumw8i ! , , , w' iil'' j 11- ,'%! b ' t , , /, i i I , I, = I 1 , .li I1 !, I i 1 i I \ I I I / �(� .,ry. ' / , i , I BOTTOM OF POOL 437 ' �! ', h I ( I I ! ,. woody gtio - _ -.. , . , , 1 I t 1 I f r I , t u 1 1 1 I IN 1! II 1 I r I 1 1 , ✓ 1 1 1 I I I% , .1 1 @ ! 1 I 1 !II I N 1 2 YR WSE = 442.60 I , 1 i / ```-� integrity. l 1 1 I, Ai! _ •- 1 i 9 I . I I 1 I 1 1 1 , " , / 1 1 I MICRO POOL ELEV. =437, r . AQU - , , I 1 I! it . 1 i , 1 I I I ' ' ....,. �✓ / / ,' I 1 1 i i I I / / i I i 1 1 I 11 I i I I ' / -•�} bu y ,�y�, / / 1 I 1 I , , 1 , ,' 1 1 ' I I I 1 / • ItYsprnct,_pcitd k utfall''Chaeln irbA !`dills' w ' i�Il T04* . 1 1d'I'';�y1iS* , ' ' 1 1 1 1 I ,. / , 1 I 1 , ( , i 1• tl , , 1 I 1 , / � NI'' � 1 i 11 // I i i I i I I I I\` y; \ I I I i I'I '� I, 1 YR WSE = 442.44 i i i i i Ir s, i\ A ..rt 'l 1 I - / 1 1. I ,. -1 1 11 5 . •\� I I I! I I 11- 1 I 1. 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I � z 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 5113/19 AMENDMENT1 COUNTY COMMENTS RTY 5 6/19/19 AMENDMENT 1 COUNTY COMMENTS RTY N, I I Tj KNOW WHAT'S BELOW ALWAYS CALL 811 BEFORE YOU DIG It's fast. It's free. It's the law. glli, -... _ " _ I I I .. ',I ,.1 , it , .. \ ; Y, - \ .,` .. \ \, •� 1 • I4 4 1 1 I , - t t , 1 1 \ t. t.. I I ,;.,� ., .. :: - ._., 1 I . If / / t Y \ \ \ \ \ \ ROP ISER I ! 1 1 1 1 !1 1• II 1 1 , I 1 1 \ \ I / • 1>1 t e Irleslattvn of all traalt racica revue slopal pleas pr fiashhoard rls s >lor evldance a if 1 I . I , ,, ,t I t , \ % \ \ ` \ -'-- _ 1 1 11 ►I I 1 I I 1 I \ I / 1 I . / I, , 1 � \ \ \ STRUCTURE -- _ / _ 1 '1 I I • , , I \ , r:�. ,. Y \, 1 h I N R clo "'.a�"�r;j�ie�n, etc, I f , r �, t `` ,` \ •\ - _ _ I i I 'p /� % I I i I `\ ``\ \\ ♦\ I . I 1. % yy NOT APPROVED , '<> s: iV�'iEiR: IIIf+{ `. and r jE`ta 310e,,vjtllllli I r ,er G_ , \ \\ �\ . . \% ` \ 1 � f ►= I , / , \11 '�,t11 �lYl ! f I I enetl'and I ; ' ,: /; ,; ' \`\ \ 1\\ `\\ \`\ \\ `. \\ \. i ! \ \ - --'- ' t l ; % i f1 `` I CONSTRUCTION . r,.. ; , , \ \ .\ \\ \ \ �..,.••..� 1 I. ; 1 \\ \ ----_" PROJECT No.: V152000 \ - yI . , ;, Q .t ,. ...; .:1I'sparse Vegct4 v#o0 1 I ' ' ,' ,' ` \ \ \ \ , 1 \ • t r j I \` �,.;� \ -___ -- -- _ �..,: , t Ot +, . i i� ` ,' `,` \ \ \ \ \ \ i 1 1 / , , \ I DRAWN BY: \ A _ t , % --- N ^"'�'11:1.1 r , ,' : \ \ . \ \ `\ \ `:• CQ@ \ _ - ---- - ,', J ' i 1 '\ `•♦ `\ - CHECKED BY: RTY r R .__ J �. . C 1 I , I i ' \\ \ \ \ �" \\\� wz�.4:= :_:_� i "-- i i ^� _ ` � ---- DATE: 4/8/2019 ,.. I I \ 14 4Ay:`. - - AS NOTED - - r Iiiallit 1 r : ✓ i ,' ` \ \\ 0.g'L� `i��� _ _ - i I i j �` �� ` SCALE' I 11/ l6°Fw Rttr' 5 *'I.: 1 t . , / , \ \ ♦ \ \ �- ---- -- -- • I I I ! I I I 1 __ CAD I. D.: SW 1 . , , / ♦ rW 434 00 \ \ \ --- .--- \\ arti 1 1 I , `� _r_--^-_-____--_ -__-- '�kl War rf a�:`m YJf sF:M, i' EI ei4: /�. W. - Y�•�F: t, - / / \ \ I \ - _ 1 1 \ ..----------------'-_-'--- t `� BW 434 00 \ \ \ \ ` -- / I \ . _ r �� a ♦ `�_ 11 , _ . ,-., ,. _, a .: .,., N _' / ' / , \ \ \ - , , I , _--------� ' _� I'llI I \ EXTENDED �j1�1f� DETENTION j1��If° �1f�1f � y 11 DESIGN TABLE 1[� (sGl it l0 1`iab : :lastl'it tew►� 111+1�P': n9'tCrr�t�ls i at e�t3e )' 1 ," G�3.4 ` -.\- - - -- --- . - �`''----+_ ` \\ I I JLa� JL E�J1JlJLeJLJI J1JlJ1� JL E� JL JL®� L �l JL JUJJL��JL�N A d71�IDLE Version i A /peril i� 4616' Page' 5 of 1'7' WQL ORIFICE -]BOND 413 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 -------I ___ - - ­ 0.315 cfs Q max 0.630 cfs A orifice 0.060 ft D orifice 0.276 ft - 3.31 inch ' _ THIS CALCULATION IS PROVIDED TO SHOW THAT THE 1.90" ORIFICE USE =-_nit ORIFICE PROPOSED WILL MEET THE DRAWDOWN TIME REQUIREMENTS BASED ON 1.9=SED ;. <�HE WQL VOLUME PROPOSED FOR POND 4B. RIPRAP INLET CHANNEL PROTECTION PROP. 72.89' - 30' RCP @ 1.51% THE ORIGINAL VDOT POND, VDOT BASIN #2, WAS SIZED FOR A TREATMENT 1 �.s•=, „a°';h ''"''st;; .. VOLUME OF 7,151 CF OF STORAGE, WHICH EQUATED TO 1.58 LBS/YR OF ' s "" ~ ` PROP.21.86'-30" PHOSPHORUS REMOVAL. THE POND CURRENTLY PROPOSED, POND 46, REQUIRES HDPE @1,14°/, 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 24.09'-30" DESIGN TABLE ABOVE) OF PROPOSED TREATMENT VOLUME, POND 4B IS @ 1.25% ADEQUATELY SIZED FOR BOTH THE VDOT EXISTING RUNOFF AND THE ADDITIONAL PROPOSED DRAINAGE AREA. 100YRWSEL--44436 J -�BECAUSE THE VDOT PORTION OF THE POND IS TO BE LEFT AS -IS, THE 1.58 LBS/YEAR TREATMENT ACHIEVED BY THAT EXISTING VDOT POND WAS NOT USED PAVEMENT INV. IN=445.20 IN OUR PROPOSED CONDITION. INV. OUT=445.00 INV. IN=445.00 -- GRANULAR ROAD BASE PAVEMENT BACKFILL INV, IN=444.70 PROP. ISOLATOR ROW (10) SC-740 (CHAMBERS FOREBAY BOTTOM ELEV.=440.00 WITH 1.0% SLOPE TOWARDS FOREBAY SPILLWAY NOTE: T�\ 1r ]BOND 413 PROFILE NOT TO SCALE 1. CONTRACTOR TO INSTALL AND MAINTAIN ANTI -VORTEX DEVICE ON SEDIMENT BASIN SHOWN UNTIL THE COUNTY INSPECTOR APPROVES THE TRANSITION TO A TOP OF DAM PERMANENT FACILITY AND RISER STRUCTURE. (SEE z44$'40 SHEET C-205 FOR DETAIL) 100 YR WSE=444.38 - 10 YR WSE=443.76 2, POND ROUTING TO BE PROVIDED UNDER SEPARATE 1YR WSE=442.44 COVER. EW-2 ENDWALL \�_3. CONTRACTOR SHALL ADD PROPOSED NAITIVE WETLAND WSE=437.5 INV. OUT=434.30 PLANTINGS TO AQUATIC BENCH AREA THAT HINDERS INV. OUT=432.18 4 .28' - 48- RCP 0h 4.3096 ACCESS TO FOREBAY AND MICRO POOL. BACK -PITCHED PIPE . '. ... . .� ,• `•4 STABILIZED 10' FOREBAY 4 • ••'' .•' ' SPILLWAY (RIPRAP) CONCRETE CRADLE 10' CL-A1 RIP -RAP PROTECTION) ELEV-=444 sn TAP nF RFRM AAR RA (OUTFALL Required Provided TV = [(1.0)(I11v)(A)]/12 - THE VOLUME REDUCED BY AN UPSTREAM BMP A MINIMUMOF 15% OF THE TV IN THE PERMANENT POOL (FOREBAY, MICROPOOL) - LENGTH OF: THE SHORTEST FLOW PATH / 23,168.48 c.f. - (750 c.f. from Isolator Row) = 22,418.48 c.f. 3362.77 - - -- -_ - 34,000 c.f. 5,600 c.f. _ 0.64 AVERAGE Tv ED TIME = 24 HOURS OR LESS 30 hr. I TURF COVER ON FLOOR ------------------------------------ - Yes FOREBAY AND MICROPOOL - Yes CDA LESS TIHAN 10 ACRES - Yes POND 413 RISER DETAIL -- - NOT TO SCALE 10 YR WSE = 443.76 Ad - - PROP. TRASH RACK SEE DETAIL SHEET C-905 PROP. 4" DIA. OPENING V PROP. TOP = 443.75- TUBE TO BE COVERED V PROP. TRASH RACK SEE UPON FINAL SITE STABIL DETAIL SHEET C-905 INV=441.00 6, PROP. 3.5f WIDE WEIR INV=442.40 ON TWO SIDES OF STRUCTURE PROP. 4" DIA. OPENING T1 WITH SOLID PLATE. CONI A 1.90" DIA. ORIFICE AT IN --!-/8" SITE HAS REACHED FINAI PROP. TRASH RACK SEE --- - PROP. 1.90' DIA ORIFICE 49.28' - 48" RC INV=437.50 DETAIL SHEET C-905 _ VPROP. PROP. TRASH RACK SEE t\ / DETAIL SHEET C-905 ', 04 \ ,• �� • •• CM PROP. INV = 434.30 ; V' .. '.. ' . , . N ITH 6" DRAINAGE 'ITH SOLID PLATE ZATION 1 BE COVERED RACTOR TO DRILL ✓=437.50 WHEN STABILIZATION ' @ 4.30% PROJECT: VIRGINIA STORMWA']TER MANAGEMENT PLAN FOR BROOKHILL BLOCKS 4A AND 4B AMENDMENT I LOCATION OF SITE ROUTE 29 SEMINOLE TRAIL RD AND STATE ROUTE 643 POLO (GROUNDS ROAD CHARLOTTESVILLE ALBEMARLE COUNTY, VA so BOH LER 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 U R"W YAUCER - •0 Lic. No. 0402056625 a 6/19/19 � NAL SHEET TITLE: POND 413 DETAILS 1 H:\15\V152000\DRAWINGS\PLAN SETS\SECTION 1'BLOCK 4A AND 40- FINAL 117E PLANvOo -BLOCK 4A AND 4B\VI 52000SWI.DWG PRINTED BY: DREARDON 6.19.19 @ 6:29 PM LAST SAVED BY: DREARDON