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HomeMy WebLinkAboutWPO201700037 Plan - VSMP 2020-06-30BROOKHILL CINITY MAP: �644`11I.lffiffi`tONi1*1i OWNERS: TMP 04600-oo-oo-o19133 CROCKETT CORPORATION 435 PARK STREET CHARLOTTESVILLE, VA 22901 DEVELOPER: RIVERBEND DEVELOPMENT, INC. 455 SECOND STREET SE, SUITE 400 CHARLOTTESVILLE, VA 22903 ENGINEER: COLLINS ENGINEERING Zoo GARRETT ST, SUITE K CHARLOTTESVILLE, VA 22902 TAX MAP: 04600-oo-oo-oi9B3 D.B. Soii, PG. 170 39.98 ACRES ZONING: NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT (ZMA2oi8000si WITH PROFFERS - APPROVED BY THE BOARD OF SUPERVISORS ON JULY 17,2019) - THE CODE OF DEVELOPMENT AND APPLICATION PLAN FROM ZMA20-500007 ARE STILL VALID AND STILL APPLY TO THE BROOKHILL PROJECT. ENTRANCE CORRIDOR OVERLAY (EC), AIRPORT IMPACT OVERLAY (AIA), MANAGED AND PRESERVED SLOPES OVERLAY DISTRICT, AND FH-FLOOD HAZARD OVERLAY ZONING DISTRICT NOTE: A SPECIAL USE PERMIT APPLICATION (SP20i5-00025) WAS APPROVED TO ALLOW THE GRADING ACTIVITIES IN THE FLOOD HAZARD OVERLAY DISTRICT (FH). THE SP WAS APPROVED ON NOVEMBER 9, 2oi6 BY THE BOS WITH CONDITIONS. TOTAL PROJECT AREA: TOWN CENTER - 39.98 AC PROPOSED USE: MASS GRADING FOR FUTURE TOWN CENTER BLOCK CLASSIFICATION: VILLAGE CENTER: NEIGHBORHOOD SERVICE CENTER AND URBAN DENSITY ALLOWABLE DENSITY: 53. UNITS (MINIMUM) To 154 UNITS (MAXIMUM) - z DUA TO 6 DUA FOR THE PARCEL BASED ON 25.8 AC WATERSHED: THE PROPERTY IS LOCATED WITHIN THE NON -WATER SUPPLY WATERSHED AREA OF THE SOUTH FORK RIVANNA RIVER AGRICULTURAL/FORESTAL DISTRICT: NONE TOPOGRAPHY & SURVEY: TOPOGRAPHY WAS COMPILED FROM SURVEY BY LINCOLN SURVEYING AND BELL LAND SURVEYS, JANUARY 20-5. BOUNDARY INFORMATION WAS COMPILED BY LINCOLN SURVEYING ON MARCH 7, 2015. FIELD VERIFIED BY COLLINS ENGINEERING, MAY 2020. DATUM: NAVD -988 EXISTING VEGETATION: THE PRE -CONSTRUCTION GROUNDCOVER WAS A MIXTURE OF GRASS AND WOODS. CURRENTLY THE AREA IS AN ACTIVE CONSTRUCTION SITE AND THE LANDCOVER IS NOW A MIXTURE OF GRASS, WOODS AND EXPOSED EARTH. ARCHER AVENUE, THE ICE RINK SITE AND APPROVED WET POND 4 HAVE BEEN CLEARED & ARE CURRENTLY UNDER CONSTRUCTION. BURIAL SITES: NO CEMETERIES WERE FOUND DURING FIELD INVESTIGATION OF THIS SECTION OF THE DEVELOPMENT. PRESERVED/MANAGED SLOPES: PRESERVED SLOPES AND MANAGED SLOPES ARE SHOWN WITHIN THE LIMITS OF THE PROPERTY. SEE EXISTING CONDITIONS PLAN SHEET AND GRADING & DRAINAGE SHEETS. FLOODPLAIN: THERE IS A too-YR FLOODPLAIN LOCATED IN THE BROOKHILL DEVELOPMENT PER FEMA MAP ID 51003Co28oD, DATED FEBRUARY 4, 2005. IN ADDITION, A DAM BREACH INUNDATION ZONE EXISTS IN THE BROOKHILL DEVELOPMENT FOR THE SOUTH RIVANNA DAM, WHICH IS A FEDERAL DAM LOCATED UPSTREAM OF THE PROPERTY. THE APPROVED FDP PERMIT # IS 2o1600004. RETAINING WALLS: NO RETAINING WALLS ARE PROPOSED WITH THIS PLAN. THE FINAL SITE PLAN FOR THE FUTURE TOWN CENTER, WHICH IS SEPARATE FROM THIS PLAN, WILL INCLUDE RETAINING WALLS. UTILITIES: NO UTILITIES ARE PROPOSED WITH THIS PLAN. THE FUTURE TOWN CENTER, REVIEWED UNDER A SEPARATE PLAN, WILL RECEIVE ALBEMARLE COUNTY WATER AND SEWER z SECTION 1 MASS GRADING VSMP PLAN AMENDMENT #2 (WP0201700037) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY. VIRGINIA b�/;;� I f \ O I V3 IN, / THIS PLAN PRO SES AN ADDITIONAL 8.90 ac. ,/ / \ 1 I \ OF DISTURBANCE - ��- _ ---�� — — rt o o \0 ° o o �\ —A AREA OF NEW / DISTURBANCE PROPOSED WITH THIS i P�,pMENT #�?� AREA OF NEW DIR POSED r POND PROPOSED WITH THIS \ \\\I\ A EN D N APPROVED TRAP 4C \_ \ \ \ \ \\\ /f ti _ Il� // // / %y%\ �y AVAV /\/// /\ �\ _\__\\\ o AREA OF EXISTING I� II Illl��j 111 III — — — // �',�' / / l F DISTURBANCE I III I I I� I_ II 11lif— APPROVED WITH WP0201700037 II I III III, III III I IIIII� IIIIIII V_ __--- o AMENDMENT #1 i II I / II I IIII II I (IIII\VI / l 1V�\VAIVII\��\�\\ _ 1 I° � APPROVED I�Ijll v �� III IIII IIII ICI IIIIII III\ �` v ��� o // -----� �-- ,� -- I I FI�I I \� \III IIIIIII III III II II IIII/ \�\\ �\J // L ICE RINK _ f r & PARKING Ij V 1 f w w\ —ANDER STREET . — a q / \ II I� I Ill IIII II Ifl,l ,ll ,lll / / 1 I l l l l l l l 1 IIII I I f I i/ APPROVED I;; ::` \\1IIIIIIIIIIIIIIII IIIIIII�I�IIIIIIII\\ 1 POND #4 x I \ I I V\\1 \ 4 / 380V \v p EXHIBIT OF CURRENT APPROVED INFORMATION SCALE 111=100 SIT RHO PO`p -"\ GRpON�S Rpq� SCALE: - = 200(0' Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 EROSION & SEDIMENT CONTROL PLAN NOTES, NARRATIVE & DETAILS 4 EROSION & SEDIMENT CONTROL PLAN OVERVIEW 5 PHASE IA EROSION & SEDIMENT CONTROL PLAN 6 PHASE IB EROSION & SEDIMENT CONTROL PLAN 7 PHASE IC EROSION & SEDIMENT CONTROL PLAN 8 PHASE ID EROSION Of SEDIMENT CONTROL PLAN 9 PHASE IIA EROSION & SEDIMENT CONTROL PLAN 9A PHASE IIIA EROSION & SEDIMENT CONTROL PLAN 10 PHASE IIB EROSION & SEDIMENT CONTROL PLAN 11 PHASE IIC EROSION & SEDIMENT CONTROL PLAN 12 PHASE IID EROSION & SEDIMENT CONTROL PLAN 13 EROSION & SEDIMENT CONTROL PLAN DETAILS 14 PRE DEVELOPMENT STORMWATER MANAGEMENT PLAN 15 POST DEVELOPMENT STORMWATER MANAGEMENT PLAN 16 STORMWATER MANAGEMENT DETAILS 17 STORMWATER MANAGEMENT DETAILS 18 STORMWATER MANAGEMENT DETAILS 19 OVERALL BROOKHILL STORMWATER QUALITY COMPLIANCE TABLE 20 TOTAL SHEETS EROSION CON TROL * HANDBOOK SPECIF CA TIONMENT NUMBER CONTROL CENUMM CONSTRUCTION ENTRANCE 3.02 CR CRS CONSTRUCTION ROAD 5.05 STABILIZA TION SFx x x SILT FENCE 3.05 SOT SEDIMENT TRAP 3.13 SB SEDIMENT BASIN 3.14 OP OUTLET PROTECTION 3.18 RR RIPRAP 3.19 CD ' CHECK DAM 3.20 TS TS TEMPORARY SEEDING 3.31 PS PS PERMANENT SEEDING 3.32 TP TREE PROTECTION 3.38 DC DC DUST CONTROL 3.39 APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIADEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT 0 SCOTT R. LLINS Z U Lic. No. 035791 16/25/20 �4 oSI ONAL z O � a � U) LU CID Z oV, O z Q O w 1�1 W w 0 0 w N N Q N N in W t C� M N i NC N N LLJ J_ LU 0 Q U LU U) F LU LU U) LU O N w J U w r, w O LU cl� _ a v) JOB NO. 182150 SCALE AS SHOWN SHEET NO. 1 \ 1 -I -_ i n \ \\\\ \-\ I- 1,'Ill I I I III — — —<�- — I / / / \ v vvv ,- r/ \ )Il I I I I I � - -i 1 — " � 1-1 / / / / % �8, � / / /" I \ \ \ \ \\ v \vv _� \v`� vA `\ ��. 1 ' V 1 \, A A GENERAL NOTES: _- i / �1i -7 -� / / �-_ / / \ / / \V\ ` v v vvv�vvvvvv v � I� 1� I / L 0 iI� I / \ I L I _ - - 4 _ _ / / / � __ / / � / A v v v v v vvvA .vim ,_ \ I 1 / / II I I I Id P l 1 � � i � - � � � / / � � i / / V ��\ ��v V� � �, �. \ � 1. NO FLOODPLAIN EXISTS ON THE SUBJECT SITE PER FEMA � / - / / ash / A \ \ V Ate, A A\\\ \ 1 I I I \ fi-� ��s-_- <� / ' A / / v � �� vvv � ��� FLOODPLAIN MAPS # 51003CO280D. �J l I ,_-- / v \vim �, v v I - r A I -'_ - - --�- _ - i � / _ / / v v — .. A �\ EXISTING SANITARY SEWER AND kill, A \ � � l I t L - I I _ _ _ _ 11 - _ // �6� / / � - - \ \ \ I�1 2. BEFORE BEGINNING SITE WORK, THE CONTRACTOR SHALL 'I I� _ J_ - ! I _ ' - - - BLOCK 9 / / / %' _ / � - _ v v v � ; .. A\ v As \ \� zo SANITARY SEWER EASEMENT \ \ \ \ INVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF / / / _ _ _ �"°�/ - ��� - _ - vvv A-- I - \ V A / SCOTT R. LLINS � I - I I I �I - — I _ 1- - �� y �� - / �� - \ _v � _ \ �� A V \�, UNDERGROUND UTILITIES, MECHANICAL AND ELECTRICAL SYSTEMS, T� U Lic. No. 035791 — \ J 11 _ a- A- _ \ \ \ ;\ \ \� ` AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE / _ _ � � _ V �,6, _ � //^� /- � �-: - _ \ V\\ V �� �j o CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION �0 06/25/20 _ -� �' _ �/, \ _ 0 \ I AND INVERT ELEVATIONS AT POINTS OF CONNECTION OF SANITARY �� s s 6 _ _ v / I� / I 1 I1\ ry I I I I j \ �v - / / / / �� �� BLOCK i1 \ . - �� vv \ V A I A \ SEWER, STORM SEWER, AND WATER -SERVICE PIPING; / NAL - _ I I� ✓ / j V ALBEMARLE COUNTY / / \ �w� ���� A v �� Av v J V V / i _ -T I I I I / / / // // \ \ \ ��,�vv�, �� v� v A _ v / V UNDERGROUND ELECTRICAL SERVICES, AND OTHER UTILITIES. THE �, I MANAGED STEEP SLOPES _ / / \ \ - \- �� / \ \ 0 \ s \ / / \ / �\ _ s� \ \ v \ \ CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED \ / / - /-� v / \\� _ v --- ill l �lI VA l - I l / v - % A �- v v v \� �/ \ \ V A�d TO PROJECT THAT MUST BE PERFORMED BY PUBLIC UTILITIES — I IAI �I II I / // ,/ \I \ \\\ Y - / //� I I / \ \ \ \ �\� \\�\\ \ i \ \� � \ i I I \ o \ \\�\ \ SERVING THE PROJECT SITE. I(--_,IIII IIlj` q� III I I / /////� Iv \ v � - / / // / �, ��v_- ��,�vv �v � � v � v � v III v �v _ , - - \ \\\\ \ J \ \ \ I I o\ \ \ 3. CONTRACTOR SHALL VERIFY SIZE, TYPE &LOCATION OF EXISTING ii ,�- -- III �lllllll II AA - I l l / �-4/ //i�\ \\\ \-1 __ �// /' � \'�/ /�// -_ A \,_�_ v \ � -, \ \� A _ l v V - - - / - / / / i ' / / � A�_� '_ � � \ V I I 1 \ \ jA UTILITY LINES ON THE SITE. / �/ �! F- -� ���IIIIIII II I I I I I I "/I , ` �-- �� � �__� � ��_� ��� V I II ovv v _ I / , , t� v I\\v � _ - - - - - - - / i - - \/ / / _ _ _ A v _ v V A 4. THIS PROJECT INCLUDES A PROPOSED GREENWAY. / z III , I I`I I I I I / \4 / _ - ` s \ \� \ \ °\ L _ III I l IIII ��� I\� �-, \ _ _ _ _ / // \ ALBEMARLE COUNTY 1_ ` _ \� \ \\ 1 Ko \, '� \\ �.:. / / / p �� - ��\ III I / /III /- I \ I , _ t � _� - � � f- _ - _ / � - PRESERVED STEEP SLOPES � \ \ \ \ \ � � LIMITS OF SUNNY to l` �_ \ \ "I u ice/ - ti y I L_- ;IIII I I I I (I lll�ll lr - _ ' ���- _ _ _ �'� _ _ - —_ ` IL t � I b \ � \ y , __�, � .� , � DAY DAM BREACH °rl/�_ ;/ ���� I I 1� -°� _ - _ -_ - _ - _ate / \ - - /, - - - - - - � V ` V �_ � \ � I V _ • 1 / z /� �\ , IIII I a�a = ' - - - - _-� - A �� �' / e / � _ _ \— _ y �\ yi� �I �� A\ I I I I IIII � - - _ v � � - � w - ��� i \\ III \ - I - 8- �� \ �� - I I \ \'::::. .fir \ - _ _ —I--asp-- ' �i-- / —' rev —�/ i� / \�—_ ��\ \ s III I11 I I I IIII v — - ���� ���_ � - - �� _ _ �� v I - ��, 0 \."al o w I IIIII I I IIII Ill ` /�_ ___- -- - -- ` � v -' _�-"--- _ \v :. ... v vs I a 3. :,:•.�. �' ��/y Q -- f / / / / I I -�_ � — — �v - \� -- -_ ; _; _--_ - - _ v �� IlIIIIIIIIIIII�\ _ - i \ ,A i ©::._ // �I I III II ������ �� - --- _-- __ PROPOSED \ \ o� :.. �s I I lO J � CO o // ���� v - _-- --_ _-_�, _� - — _ --- ' - - -- --- ��\ � � I ; _ _ _ = - — GREENWAY, TYP. \ \\ \ I o I ° / \ Z "' I / / \/ I I I I _, �,v ��vv\� - � � '- - ; � �, `1 _ _ v ,� o I / I I /� z - < I , )111 �/ v �� _-v 1�-- III / / I Lu I I �I III , ;� I ��, ,I �_ _ ,.�._� VA%� �% _ ' y ���\yyo, - � � \ _ / 1 I ��� / � v v o. A i A \-�� i III 00 I I �I)� �I� 'I� vvv ---� �/ �. --- ;�������\�_ A - - � Av ` vv v �'1 � 0 � t/ / F■1 _ I\� I v\ II � I� III 11�� v� - - vv A_ _ / i �/ -- �wwv��,���` yw� / �w vvv v= I� j �` / \ / . 7 ' 11 z a I v I I III I III � � - / i - �� , v� v� v - � \) A v A � v vv _ �\ / / /� I I �11 _ _ �o - -._ - EXISTING LIMITS - - - / \ \_�\ / I i i H U) IIII \ �� _ - /\ \ \\_�-- /o I / / 1 \ \ i v v I I I I �__ - _ _ - - _ ��_ � ��__ - ___ � ��1 v v _ „ � - � 1 � . > 0 v VA� I I 1 i I Ili Z r --- �� �/_ ., - � \ -�� OF TREELINE - - - - ° �/ --// / I 1 I o I/ \ \ 1 = _ I _ �\ - - _ �- _ 3,� \ \ LIMITS OF EMA APPROVED• , I o \ I / v �A��� v� ��_ ---- _ I \ BLOCK B �; I �� - o Av \ - _ � - ° \ - ioo YR FLOODP N v v 1 I I I I vv v 4 v v_:_ - _�. � __< I A Q ,�� v 1111 ,I, II tltlt--��II�jv V _ rvv v vw\ -\ o / v._ 1 1�, V o V - I I I II " INITIAL S TE PLAN V A \� \ \ �_ _� �� - - - - � - i �_. -' �6� / % \ A V I I Ine I- / vvv \),III 1 1 I I , l __-� II A\ \ s -6 v ,/; o \\ \ IIII I I I I = t-�r�/� \\\\ \ APPROVED o5/z5/zoi8 \ \ \ _ - ISTIN STREAM I � ( I _\ N _ III I I I I I / _ - \ \� \ \ - // \ - - - 1 / , o / �\ \ \ PROJECT BOUNDARY (TYP.) \ \ \ \ \ `� \Lu / - r SDPzoi8000So IIII I V1 I I I I% / \ �- FINAL SITE PLAN - / A V �� � � I ) 00 / G_ \ I Is \ \ \ \ V A III i - - I' - v - �_ �� �� - / BLOCK z - A �- _-_ - _ ___ �o� o _ v\ I 1 \ \ \ V A A \ V A \ V A A III I 1 1 1 I _ _ APPROVED iz/i7/zoi8 _ \ \ �� �-. \ _ \ "� :. \ n \ -I \ \ \\ l 1 WPOzoi8000 i \ n \ A V A I V A \ \ \\ V A V A\ \ i f III I _ 5 PROJECT BOUNDARY (rtYP�.) �� \ - �1'-��_. �� 1 ` \ �I \ _ __ \ V / I I I I 6¢ VSMPPLAN PR1 �1 � I �,_ z \, � _ _ - - _ - _- �� - A _ _ A ° V A \ V 1 \ \ V v A \ V A A\\V A \ I IIII I I\ I I III � v 7 v A1�, _ v� � , ����\�-< o A �� A \\ \ - '- � \o d Z \: \ \ \\ \ IIII I I I I I I E. I I 1 ,�1-APPROVED o8/oi/zoig \ \ \ j 1 \ j I -��i i - _ - / �1�f ___ r: o\s ` \ \' \\\\\\\ \ _ - � V I I 1 V A \ VA1, \ \ \ / 1' �---- VV- � _ _= �_V�°� \V V ` V V \ \ \ V A A o 0 IIII I I I I �`� AI - - - _ v00 Av A v �.:.��� V AV V A A\ \ :1 �' \ v \\\ '' V �\ \1�11 I V I I\\ \\VA� v v Lu \ IIII I I I I 1 III /, I / / - Iv A \ \\ ��_ �/ '/ - - \\ ::,:� �� V \ 1 I I I I 1 \ \ \ V A vv v o N N 1 I / , I \ \\ -- IIII II I I �\ I I ,III I _ - ------ - _ -��� w �° v ° v A v �� �\ VAq / / ���� v��vvvv d\V \v `�� \\.� \�1 \ I IVA\I I \\v V ` N I \ r V A\ I I / /� �A �- - IIII I I I I IIII / _ _ l 1 �1 __1 � v v \I II /// i i , - A� vA \VA AVM\\ VA \�_ \v v, �,�� �w�_�--_ - -,) \ V AI1I I i I III / i - \, / �� `� \ \ �� EXISTING DIVERSION / /// / i " : 1 '- // _� _ _ �` \�\\\ \o A� VA\\\ � \ ° , y A_ ��-- � \m \- vIIII I I 1 1 V A v \\ \ \ \\ 1 \\ \\ — -�,I II � I IIII I � � / �/ / v v 1 \ � ' , v v vv � �� I // // / AREA OF NEW DISTURBANCE � _--�� \ \ � v\\ \ �� � ® - v v vv �� v v _ I I Ii I I IA _ / /�/ \� A V I / — v V\� - - __ _ I I w I I I V �,\ \\ \\�\� \� 1� v� �, I, / �_ �1 , v v �A ,` \ III I I I I �v / /�� ` v v I� V I / v �� BLOCK I I PROPOSED WITH THIS /; _ ,1� V ° \ 1 v v °�l l�iT �� �_� �` "'4� 4 � �/ II I I / I v �v I �� II\\ AMENDMENT #2 _ - I \� \ \\ \ I \ �K_° - �,�\ _-._�� TMP: 0 600-00-oo-oi8Bo -- �- i � I 1 I \ � ' � � I \ \ _ OWNER: HORNE LAND CORPORATION -/ I II 1 I I ° I I � �� i_ �\ �- �- A, %� \ \ \ \ VA - - I \ �/ �1�_ - _ - ACREAGE: 46.43 AC I 1 1 I / III \ i A \ I --� -_ - ---- k III \ \ - I I I 1 \ \ I � , m � . 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STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. 3.O1 SAFETY FENCE: A PROTECTIVE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 302 CONSTRUCTION ENTRANCE: A STABILIZED CONSTRUCTION ENTRANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. 303 CONSTRUCTION ROAD STABILIZATION: THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND OTHER SITE VEHICLE TRANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND FINAL STABILIZATION. USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION TRAFFIC. 3.05 SILT FENCE.- A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 307 STORM DRAIN INLET PROTECTION: A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PROTECTION APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE: A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 311 TEMPORARY RIGHT-OF-WAY DIVERSION: A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONSTRUCTED ACROSS DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW LENGTH WITHIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING THE EROSION POTENTIAL BY DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTION TRAFFIC WITHIN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC. 313 TEMPORARY SEDIMENT TRAP. A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE. 314 TEMPORARY SEDIMENT BASIN: A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. 318 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS 319 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION AND TO STABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 325 UTILITY STREAM CROSSING: A STRATEGY FOR CROSSING SMALL WATERWAYS WHEN IN -STREAM UTILITY CONSTRUCTION IS INVOLVED. TO HELP PROTECT SEDIMENT FROM ENTERING THE STREAM FROM CONSTRUCTION WITHIN APPROACH AREAS. TO MINIMIZE THE AMOUNT OF DISTURBANCE WITHIN THE STREAM ITSELF. GENERALLY APPLICABLE TO FLOWING STREAMS WITH DRAINAGE AREAS LESS THAN ONE SQUARE MILE. 331 TEMPORARY SEEDING. THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 332 PERMANENT STABILIZATION. - THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. 336 SOIL STABILIZATION BLANKETS AND MATTING. - THE INSTALLATION OF A PROTECTIVE COVERING (BLANKET) OR A SOIL STABILIZATION MAT ON A PREPARED PLANTING AREA OF A STEEP SLOPE, CHANNEL, OR SHORELINE. 338 TREE PRESERVATION AND PROTECTION. PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. 339 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. EROSION CONTROL LEGEND e 0 11 SAFETY FENCE 3.01 CE CONSTRUCTION ENTRANCE 3.02 CRS CONSTRUCTION ROAD STABILIZATION 3.03 SF -X X X- SIL T FENCE 3.05 S0 INLET PROTECTION 307 8CULVERT INLET PROTECTION 308 DD 00 - TEMPORARY DIVERSION DIKE 3.09 RW �� TEMPORARY RIGHT-OF-WAY 311 ST =E=777 DIVERSION TEMPORARY SEDIMENT TRAP 313 &F=__3 SEDIMENT BASIN 314 OP PIPE OUTLET PROTECTION 318 S ' CHECK DAM 320 TS TS TEMPORARY SEEDING 3.31 8 PS PS --&BM PERMANENT SEEDING 3.32 = SOIL STABILIZATION BLANKET 3.36 8TREE PROTECTION FENCING 3.38 DC DC DUST CONTROL 3.39 * VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER 1. SET POSTS AND EXCAVATE A 4'X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS _- Jl % t I_ I - _ y -II 1I \ FLOW I , I , =1 11- / 11 I I 4 3 ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. �_/ EROSION CONTROL NOTES: 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. J. 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 7:00 AM TO 9: 00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT 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. 16. 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. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYGRASS 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 EROSION CONTROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 9OLBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95X KENTUCKY 31 OR TALL FESCUE AND 0-59 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 8OLBS/10OSF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIA TEL Y. SILT TRAPS ARE TO BE CLEANED WHEN 507. 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 IMMEDIA TEL Y. 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 EROSION CONTROL INSPECTOR. 21. THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS NECESSARY IN THE FIELD AS SITE CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION. SOIL DESCRIPTION. - SOILS ON -SITE ARE CURRENTLY DISTURBED AS MASS GRADING HAS OCCURRED IN ACCORDANCE WITH WPO201700037. 278 ELIOAK LOAM-2 TO 7% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 27CELIOAK LOAM-7 TO 15% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80 ". 34C-GLENELG LOAM-7 TO 15% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80" 34D-GLENELG LOAM-15 TO 25% SLOPES. SOIL IS WELL DRAINED WITH A HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-6" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80 ". 39D-HAZEL LOAM-15 TO 25% SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER lS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 95-WEHADKEE SILT LOAM-0 TO 2% SLOPES. SOIL IS POORLY DRAINED WITH A VERY HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0 70" THICK. THE DEPTH TO THE WATER TABLE lS GENERALLY 0-30". REFERENCE: WEB SOIL SURVEY ONLINE DATABASE, FOUND AT h ttp: //websoilsurvey. nres. usdo. qo vloppIWebSoilSurvey. aspx 2. STAPLE WIRE FENCING TO THE POSTS. - H / - i� I �- r I III - - II -1 I 1 :_I, 1 l l l-11 Ill III -I 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. EXTENSION OF FABRIC AND WIRE INTO SUPER SIL T FENC� 0(WITH WIRE -BACK 0 NO SCALE THE TRENCH. .05-2 1992 SAFETY FENCE PERSPECTIVE VIEW DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES. EROSION AND SEDIMENT CONTROL MEASURES: IT IS ANTICIPATED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION, DIVERSIONS, SEDIMENT BASINS, AN EXISTING SEDIMENT TRAP, SOIL STABILIZATION BLANKETS, AND SILT FENCES TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS ARE NOT BE REQUIRED WITH THIS PROPOSED DESIGN. SHOULD FIELD ADJUSTMENTS NECESSITATE A SMALL STOCKPILE AREA, IT SHALL BE DISCUSSED WITH THE ESC INSPECTOR AHEAD OF TIME. THE STOCKPILE WILL NEED TO BE MAINTAINED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. 301 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PARTICULAR AREA. 302 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. 303 CONSTRUCTION ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE CONTRACTOR PARKING & STAGING AREAS AS NEEDED, J. 05 SIL T FENCE- SIL T FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. 307 STORM DRAIN INLET PROTECTION INLET PROTECTION IS PROPOSED ON INLETS, WHERE SHOWN ON THE PLANS. 3.09 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF INTO A SEDIMENT TRAPPING DEVICE. 313 SEDIMENT TRAP- SEDIMENT TRAP IS PROPOSED WHERE SHOWN ON THE PLANS. 314 SEDIMENT BASIN- SEDIMENT BASINS ARE PROPOSED WHERE SHOWN ON THE PLANS. 318 OUTLET PROTECTION -OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF PIPES. 319 RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES. 332 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PLAN. 336 SOIL STABILIZATION BLANKETS & MATTING - SOIL STABILIZATION MATTING PROPOSED WITH THIS PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. 338 TREE PRESERVATION AND PROTECTION- TREE PROTECTION IS PROPOSED WITH THIS PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. 339 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. MAINTENANCE: IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS: o. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. b. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARL Y FOR UNDERMINING OR DETERIORA TION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS TIME IS DIGS. BROOK WOOD WITH DIGS MAY BE REACHED AT (434) 978-4435. IN ADDITION THE OWNER MAY BE CONTACTED. UPON COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. EROSION CONTROL NOTES: ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES 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. ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES-J.-ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES-5.-PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT 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. ES-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. ES-7.•ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8.-DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES-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. PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE Source: Adapted from Conwed Plastics and VDOT Road and Bridge Standards 3.01 1992 Plate 3.01-1 TEMPORARY RIGHT-OF-WAY DIVERSIONS VDOT #1 COARSE AGGREGATE 1g' MlN- 6, MINIMUM TYPICAL GRAVEL STRUCTURE COMPACTED SOIL --- -_a 6- j, 19' MIN ' �MIMVI �' 6' MINIMUM TYPICAL EARTHEN STRUCTURE EROSION CONTROL NOTES & NARRATIVE: PROJECT DESCRIPTION: THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO PROVIDE THE MASS GRADING AND ESC MEASURES FOR FUTURE RESIDENTIAL HOMES AND THEIR CORRESPONDING INFRASTRUCTURE. THIS PLAN IS AMENDMENT #2 OF THE APPROVED BROOKHILL SECTION 1 MASS GRADING, VIRGINIA STORMWATER MANAGEMENT PLAN AMENDMENT #1, WP02017000JZ THIS AMENDMENT ADDS AN ADDITIONAL 8.90 ac. OF LAND DISTURBANCE TO THE APPROVED LIMIT OF DISTURBANCE LINE. THE PROJECT WILL BEGIN ITS CONSTRUCTION WITH THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS ANTICIPATED TO BE IN THE SPRING OF 2020. THE WORK IS ANTICIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE IN THE FALL OF 2021. EXISTING SITE CONDITIONS. THE AREA OF THE PROPOSED DEVELOPMENT IS LARGELY WOODED AREAS WITH OPEN SPACES AND LIGHT UNDERBRUSH. THIS SITE GENERALLY SLOPES FROM THE WEST TO THE EAST, AND HAS A DIVIDE AT THE MIDPOINT DRAINING TO BOTH THE NORTH AND THE SOUTH. THE SITE IS GENERALLY STEEP AND IS WELL DRAINED. AN EXISTING, APPROVED SEDIMENT BASIN 1�4, AND SEDIMENT TRAP 4C ARE ON -SITE PER THE APPROVED PLANS, WPO201700037 AND WILL BE UTILIZED FOR IHE MASS GRADING PLAN OF THIS SITE ADJACENT AREAS. THIS SITE IS BORDERED TO THE EAST BY A STREAM PROPOSED TO BE PRESERVED. NORTH OF THE PROPOSED SITE IS BROOKHILL PROPERTY. WEST OF THE DEVELOPMENT IS STELLA ROAD, UNDER SDP 201700117, AND SOUTH IS SALAMANDER STREET. SILT FENCE WITH WIRE BACKING, DIVERSIONS, SEDIMENT BASINS, A SEDIMENT TRAP, INLET CONTROLS AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT THE POTENTIAL FOR CONTAMINATION OF THESE ADJACENT PROPERTIES AND WATERWAYS. OFFSITE LAND DISTURBANCE.• OFFSITE LAND DISTURBANCE /S LIMITED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL BROOKHILL DEVELOPMENT BOUNDARY. SOILS.• SEE SOIL DESCRIPTIONS ON THIS PAGE. THE EXISTING SOIL BOUNDARIES HAVE BEEN DISTURBED, AS THE PROJECT IS AN ACTIVE CONSTRUCTION SITE. CRITICAL AREAS.• EXISTING WETLANDS AND INTERMITTENT STREAMS ARE LOCATED ON THE PROPERTY DOWNGRADIENT FROM THE PROPOSED DEVELOPMENT. THESE AREAS, IN ADDITION TO THE MANAGED AND PRESERVED STEEP SLOPES, ARE CONSIDERED TO BE CRITICAL AREAS. THE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON THEM OUTSIDE THE SCOPE OF THE PROPOSED PLAN. TREE PROTECTION FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED. SEQUENCE OF CONSTRUCTION: 1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A PRE -CONSTRUCTION MEETING. 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE SHALL BE FLAGGED AND THE TREE PROTECTION FENCING SHALL BE INSTALLED. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. 4. INSTALLATION OF THE PROPOSED CONSTRUCT/ON ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL APPLY CONSTRUCT/ON ROAD STABILIZATION AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUCT/ON ENTRANCE DRAINS TO AN ADEQUATE E&S MEASURE. THE CONTRACTOR SHALL UTILIZE THE NEARBY SEDIMENT TRAP FOR VEHICULAR WASH OFF. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED 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 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 TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 5. THE INITIAL ESC CONSTRUCTION MEASURES AS SHOWN ON THE PHASE / EROSION & SEDIMENT CONTROL PLAN SHALL BE INSTALLED NEXT. THE CONTRACTOR SHALL BEGIN BY INSTALLING THE PER/METER SILT FENCE. PER/METER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. ONCE THE PER/METER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, THE CONTRACTOR SHALL PROCEED TO REMOVAL OF THE EXISTING INTERIOR SUPER SILT FENCE ALONG THE OLD LIMITS OF DISTURBANCE LINE, AND LIGHT CLEARING OF THE SITE THE CON TRA C TOR SHALL BEGIN BY CLEARING THE AREAS REQUIRED TO ACCESS THE L OCA TIONS OF SEDIMENT BASIN B, AND THE AREAS DESIGNATED AND/OR APPROVED BY THE INSPECTOR FOR CUT REQUIRED FOR THE BASIN INSTALLATION. INSTALLATION OF SEDIMENT BASIN B SHALL IMMEDIATELY FOLLOW THE SELECTIVE CLEARING. FOLLOWING THE INSTALLATION OF THESE MEASURES, THE CONTRACTOR SHALL INSTALL THE DIVERSIONS. THE EXISTING DIVERSION DIRECTLY SOUTH OF THE BASIN B CUT SHALL BE ADJUSTED PER THE PLAN, TO MAINTAIN POSITIVE DRAINAGE TO THE EXISTING STORM DRAIN. ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME. 7. ONCE ALL THE PHASE I EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO THESE MEASURES, AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF THE SITE. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 8. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE ll OF THE EROSION & SEDIMENT CONTROL PLAN. UPON INSPECTOR APPROVAL, THE EXISTING SEDIMENT TRAP 4C CAN BE REMOVED. THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE PHASE ll EROSION & SEDIMENT CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE ll EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 10. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN 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 YEAR. 11. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 12, 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 AUTHOR/ZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. GENERAL SLOPE (3:1 OR LESS) PER ACRE TOTAL LBS KENTUCKY 31 FESCUE 128 LBS. 3.11 Paved construaon entrance for erasion control pleas Source: Va. DSWC Plate 3.11-1 RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. 150 LBS SEASONAL NURSE CROP FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINLD 3Y SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION Source: Va. DSWC OF SEED APPLICATION, IN ACCORDANCE W1 VESCH STD 3.35. TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS -QUICK REFERENCE FOR ALL REGIONS" Rate Planting Dates Species Ibs. acre Sept. 1 - Feb. 15 50150 Mix of Annual Ryegrass (Lolium multi-flomm) & so -1ao Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (Lalium multi-florum) May 1 - Aug 31 German Millet 50 (Saaria italica) Source: Va. DSWC STONE 7a.' W14. CONSTRUMN ,ACCESS /-\ wRs3" SV-2A ASPNALT TOP zee z '--fi' MAN. 21-A AGGREGATE BASE PROR STONr 7C' MIN, CONSTRUCTION ASPHALT PAVED AC E55 -A I-{� 0 r WASH I( 2% 1 2% 12% 12' III:N." -- 1 pCslrve �kwnaGE •MUST EXTEND FULL WIDTH I--� �� T4 SEd11� OROPERATIONWO OF RATIONS AND EGRESSENT TRAPPING DEVICE PLAN EXISTING PAVEMENT EX15TING PAVEMENT N� ---- -12' URN- �P0SI TIVE DIRAMAGE TO SE01MENT 7-7 f"PPNG wvicf SECTION A -A -% II U11H I1.111I1 W.110 FIV Of 1 me 31 II tl-4 bt al: hEt' l wIll a 11L11 H1I11InI l LIIL II b.11L tick ;lilt[ u'l1 ;Ilh t .I:pphy7ng s Wa.111 hn r mi"I a i411wetel ut 1. ` It dxx kol :0rtll IMe w txd pI ek�,Iu e. Wa It will et ilul�t l)e caItterl ;1u;7,k, f1 �itti r11e eslh mlr t! t(' :III aplrt m,ed ,,�eltW 1 at ea to tewove xe(hiiiiALt .AIL �.,,�luttetN !;ll:%U be pl e1'OIte(i b Our cWtii lg stmin demos. d6fckkes OF W;dCyxoseSrs. �Al1ED DASH R�4CK 1992 PS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) FILTER FABRIC ENTRENCHED6" COMPACTED SOIL 3' MH4RfUM _ III -III 11 111 1=1 1 _ =III=III=III III Ill- -III=III=III=III =1 1=1 � 1=1 � 1=1 � 1=1 11=1 I I -III -I 1 I -I 11=1 11=1 Is- �• _ - =1I=111=1I II I -I =1I1=111-III-III-III=I I1=1I1 1I1 1I1 1 = =1 11=1 1=1 1=1 1. 1-III I II I I -I 1=1 -1 I -1 -1 1= -- 1I I =' 111 I I' I I III - I I=1 11 I- I 1=1 I � I I I I III-1 I I-1 I I- _ III 11 11 111- 11 -I = IIII III=1I1=1I1 6' DD TEMPORARY 18" DIVERSION BERM FENCING AND ARMORING I DRIP LINE SNOW FENCE BOARD FENCE CORD FENCE - t"• - - PLASTIC FENCE CORRECT METHODS OF TREE FENCING 00 SON_ CORRECT TRUNK ARMORING 00 TRIANGULAR BOARD FENCE Source: Va. DSWC 3.38 Plate 3.38-2 , ,! kT77�'7,o-- SCOTS7" - � Lie. No. 035791 1�0 �,��sNAL25/2l�,O/ 0��G�'� E� z O a r_ V 2: w � Z Z J O 0Q � H ~ Ln > z w V0� H W w 0 0 w N N I.-kO In 0 � � N tD 0 9r-- M ti (D u-), z0) 2: < co N M ~ W 91:1- 0 0 01 I < 015 N J:e W N N W> 0� L zJ J Q z z - W W O Lu '_j O Z �zJ z = a00 U 1.4 0� I" I--- z w � w U 0 �__ W U U z J �.�..� zW � o � ~� w w = U) W J w 0� O Z J� �o^ Q O VJ ce O 0 ,::) Lij N CO 0� w J F- U I-_ � I-_ w 0- � JOB NO. 182150 SCALE N/A SHEET NO. 3 2 - NOTE: / ¢- NOTE: THE LIMITS OF DISTURBANCE FOR THIS PROJECT SHALL BE LOCATED ALONG THE SILT FENCE INSTALLED AROUND THIS EROSION AND SEDIMENT CONTROL PLAN IS AMENDMENT #2 TO THE APPROVED BROOKHILL SECTION 1 MASS GRADING VIRGINIA STORMWATER THE PERIMETER OF `� I I ` \l � \ / TH \ MANAGEMENT PLAN AMENDMENT #1 BY BOHLER ENGINEERING, WP0201700037. EXISTING SEDIMENT BASIN #4 IS APPROVED AND CURRENTLY IN USE THE PROJECT SITE. THE SILT FENCE IS LOCATED 6' OFF THE LIMITS OF DISTURBANCE AND A MINIMUM OF 6' FROM THE PRESERVED SLOPES. THE � J �� ON SITE. THIS PROPOSED AMENDMENT SHALL UTILIZE THIS BASIN TO TREAT A REDUCED DRAINAGE AREA FROM THE APPROVED PLAN (16.02 ACRES TREE PROTECTION FENCING SHALL BE INSTALLED ALONG THE BACK SIDE OF THE SILT FENCE. �\ VERSUS THE DISTURBANCE IN �D16.18 R��UPON THE APPROVED LAN WITH THE ADDITION OF PROPOSED SEDIMENT BASIN 8, TO TREAT / O \ `\ /y vy O \ / - - - SHEETS 7 & 11 HENORTHERN POTION OFHEOWN CENTERPROJECT. / � \ � ,Y . ,yam ,y, � � � � � � SH�ETS 8 & 12 / o SCOTT R. LLINS�Z �-D Lic. No. 035791 � �\\�\� \ 1 �d�o 06/25/20 = — \S�IONAL U) w �- \ \ �� vv v �� \\ v ��- ��\ - - - — Oo OO � 0 OO 0° O - -- � .yYyy - — Lu 1 z _ _ v �v v z 6 \ .y rr 1 Lu Lu Q � o y \CO � J o Q v vv — ♦ � LLJ 0 Q ff (� >Lu \ �� \ \ \ �� \ o �o Lu Lu I �� \ PROPOSED _. r / �v SEDIMENT "' I BASIN B I I �� AREA OF NEW DISTURBANCE �� I I �� ��� I I�III 11 CD CD v PROPOSED WITH THIS w AMENDMENT #2 I I o I o I I I o N N I I� I / I I� I 00 I I I I _ I I I N t0 ��v vie v A I _ 1 IQ z � �1 �/�i —__—_ — —�� � \ I� � of I I III �� a, � APPROVED �� — — — I p> W Q EXISTING I� SEDIMENT /� / v� %� j j �� I I \ �I,A ° - p(D III Lu TRAP � ����% I I I OO'''� % �� cM (!1 / 1 � / � / I III I / ���� � Z Q N M I Lu Q �ii o Lu AREA TO BE REGRADED y _ I L.L.I N C� � AS NECESSARY TO I I I I I I I � � � � � �X � � � I ���-� v' \� �_� r), L1J ENSURE A MINIMUM I� I III I I I � / � = OF 2:1 SLOPES ALONG \ �V� � � � / �..LJ LL AREA OF EXISTING EXISTING BANK �� � ��� I S� v \ \�v LLJ O DISTURBANCE APPROVED WITH W P0201700037 \ \ \ V \ \ �1 \Oo V� \\ \\ \ > w AMENDMENT #1 �� O �� � Lu - 454 C7 � 0 / 2 i AREA OF NEW EXISTING SUMP (APPROVED I I I DISTURBANCE WITH PREVIOUS WP02017 00037 \ / Lu v \u 0 -- Lu � PROPOSED APPROVALS) TO REMAIN - SEE s _ WITH THIS / SHEET 6 & SHEET 10 v I I I I / U) v I I I I �� 5 (� z AMENDMENT#2 / �� �11 I �� ���� I� -- ° \ O LuLLI z APPROVED I F- LLJ EXISTING _ ---- - ---- SEDIMENT �� - �� \ BASIN 4 \ C LLJ LLJ \ I \� � A � , . � � Ln as 0 o Ln m Al:n / SALAMA ER STREET - \ u 0 Lu �% iJOB NO. / -- -- 182150 \ q 38 SCALE f 1 „= 60' � \ V SHE � S �82 80 —_ SHEETS 6 & 1 O � SHEET NO. 4 �� 434 J FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ■ ■ ■ ■ \ / SILT FENCE/ J ENSURE VOLUME CAPACITY IS 10 /o LARGER THAN THE ■.. Lu MAXIMUM VOLUME OF STORED FUEL. n Cl) PHASE I mr \ / DRAINAGE DIVIDE I EXISTING \\ \-■���■ i \ / D APPROVED I I \ fir, \ DIVERSION DIKE \-- / \ ♦ MA SEE SHEET 7 o D c D 'ASS �V7 SCOT*,LINS Z U Lic. No. 035791 1, 06/25/20 w 10Als��E����� z � I O J w a U Lu CO O Z J Q s s s s s ® - SITE SHALL NO LONGER BE— I EXISTING \ I w > LnAC ESSED FROM THIS n APPROVED N LOCA ION ON STELLA LANE / ACCESS I 1 Q - I / U) De Lu W PHASE I / I _ i _ 0 DRAINAGES DIVIDE n D > \ D > ♦ Lu u, \ \ / un / oD u� \° D EXISTING APPROVED SUPER SILT FENCE 1 0 0 Lu N N \ / ♦� WITHIN PROPOSED EXPANDED LIMIT OF Q / o \ DISTURBANCE AREA TO BE RELOCATED U) TO BOUNDARY OF NEW LIMIT OF \ ■ DISTURBANCE LINE PER THIS PLAN ■ / o. \ PROPOSE NEW \ LIMITS OF ••�� / / ° I 1 \ DISTURBANCE / •�� / � I EXISTING D I II \ APPROVED LIMITS♦� \ SSF PROPOSED OF DISTURBANCE / ♦. D C / 1 \ ° SF WITH WIRE '� I ♦♦ I Lu BACKING co eD ♦ � U Ts I Z � ♦♦ / 1 / ♦♦ / � N Z ♦ M I II u� ♦♦ / 1 D PROPOSED � ♦ / EXPANDED LIMITS / �♦ 1 O z I I OF DISTURBANCE I ♦ N Q I AREA i / / W II � � ♦ 1 � N � I I I � _: ♦ ESC / Q J Ie I ---- ♦ > O PHASEI / / - C� II - � — ♦ W / I u� ♦ SEDIMENT / 1 L (n I I I � � P � — - I ♦j I BASIN 4 / / _ � \� / Q z � 16.02 ac. / > O z �w o w • / / _ 0 \ / w p w ♦ / �� i \a � Z o Ts • / 1 06 \ 0*0 I • / - w z • u O /_ ■■■ ssF� F ♦ /���■■■■■■■■■■■■i�° Q ° T1I \ I � SS •■ � �EXISTING � / sSSSF APPROVED ♦~ �+ O ADIVERSION DIKE C/) SSF SSF ♦ � � W ■ � w w Is��♦ / Ln z O� < SSF SSF � \ Is■ • / 0 SSF — D D is SSF SSF SSF _--SSF ��F S SSF SSF Ss� SS SSF SS SSF SSF SSF D D °5. Sit!—S. 5- S. S o.- 5 �i8 5 p. ° o ° o pe ee J w --- --- — ��2-- PROPOSED SSF SF WITH WIRE / J w w w w . 5 w w� w '-w/ w w w w w w w w w w w w w� / / ' -- O BACKING �SALA ANDER / / SSF PROPOSED _ / SF WITH WIRE \ � i �`TREET / / / / _ — , BACKING N W o ° a ° / \ \\ � <� AS S S S�s-ASS SS ASS \ sS ASS U' / 000 —456— \\ I I i � ASS � _ \ P s s ® s ®, ss 3sS EXISTING -438 sS— 1! GRAPHIC SCALE APPROVED LIMITS - \ ASS / OF DISTURBANCE EXISTING / S �3�— V A KEY 30 o is so so �?� A PROVED SUPER ASS ass/ �� SF \ I ILT FENCE TO \ I I REMAIN IN FEET) 1 inch = 30 ft. � / �� l/ 1 Ll I � w r w a � JOB NO. 182150 SCALE 1 "=30' SHEET NO. 5 i ROPO ES D SF I I WITH WIRE I o BACKING I I I I I 0. / cv \� \ SCOTT R. LLINS �Z PROPOSED TREE PROTECTION I \ �00.� O \ \\\ \ \ C-) Lic. No. 035791 � ■ I I I I I I FENCING TO BE INSTALLED 0 �� \ \ \ \ \ ALONG LIMITS OF DISTURBANCE A V \ V\ I �� 06/25/20 EXISTING, APPRO I I ■I I I I I I I I I PROPOSED DD I I II I I I II EXPANDED LIMITS �LINE TO PROTECT PROPOSED DIVERSION DIKE OF DISTURBANCE TREELINE IONAL E��� (TO BE MODIFIED) I I I I I I AREA \ \ \ \ \ I I / MATCHLINE, SEE SHEET 8 \ \ \ \ I , ON M\l ONE PROPOSED ADJUSTMENT TO EXISTING DD DIVERSION DIKE FOR SEDIMENT — _ s / \ \ 1 BASIN B TIE IN CONTOURS z I I I= I I I I I I I I — \ \ Lu ■I I III I I�� _ F - _-- ���/ �/ \ ,> I II IIII I III I_ \ \ NOTE: THE EXISTING SLOPES IN THIS AREA SHALL ■ I I I I I I /) \ / , j ! \ \ \\ z BE FIELD -VERIFIED TO ENSURE A 2:1 (MAX.) I ssF = I = I � � � X Lu GRADE EXISTS ON THE BANK. THIS AREA SHALL BE RE -STABILIZED IF GRADING MODIFICATIONS ( PROPOSED EXPANDED / / / / \ oz z ARE NEEDED TO ACHIEVE A 2:1 (MAX.) SLOPE. LIMITS OF / / / \ 0 Q W -\ / / ♦ �� / \ \ \ a SUMP AROUND STORM INLET DISTURBANCE \ --� �/� z \/ 1 PROPOSED UNDER SEPARATE SET coo OF PLANS J J 0� \ Q Q _ \ Lu---- EXISTING STORM z � � \ � \ � A \ � � \ \ \V\ � �, � _ _ � \ \ \\ \ STRUCTURES FROM \ \ �V - - _ — -- Lu APPROVED WPO PLAN \ \� \ _ A \ TO REMAIN < \ \ APPROVED J n EXISTING, �/ \ �' w = \ EXISTING STORM INLET (O \ • v, SUPER SILT FENCE TO 1 \• RECEIVES FLOW FROM \ \ REMAIN Q EXISTING DIVERSION - • �� V \ O DIKES, AND CONVEYS TO � �XISTING SEDIMENT > SSF Lu \ \ \�BASIN #4 �s�\ 1Lu NEON U, \■ V A \ � \ \ XISTING, APPROVED LIMITS OF \ DISTURBANCE LINE \ '\ Luo 0 N N N N I I I I \ F N t\O I WETLANDS, I \ T P. � • � � 1 / 11 � _ � \ Lu �yyy ti I —\ I y y M O C7 EXISTING I I / I I y • (D APPROVED I I I / / • ♦ I y C) 0)�� z 1 • � � DIVERSION DIKE � \ I I I� y y ' y N O y y y y _ �• i;, �, 11 I II I �)° ° \ I\ y---LL- I� N z 1 • III I / \ o oC ■ �• � � ,III I I I / � �� � \ \ � 1 ��, N Q ■ I I I I I / - � �° � N � � • � � I / I I I I / � � / �6� � � I • 1 / / _ / // / / �� \ I W > Cn o z � � I I l 1 1 1 1 � ,� • -\ �� Q \ � I I IIII 1 / l \ \ � • \ I � > o Ln 1*• I III 11 1 1 1 • \ u fares*** •• I I III I I / ; � \, \ • � - w � W 1■ II I II III ��I ' � \ • \ I � z EXISTING co�i 1 \ I ` ~ L u APPROVED u 1 • \ \ \ \ \ o W I I I II \ • \\ J W D C I I I I I I I I I I SEDIMENT �. • \ \ � z un 1 I I I I I I I I I \\ BASIN #4 \ \ • x Q W_ I I I �I I II I I 1 \\ � \ ♦ \ � _ � I I IIII I I \ \ \ \ \ \ \ • \ v u, I I I 11 \ \ \\\ 06 \ � II I IIII \ \ � \ \ • \ \ � z ■■■■�_�■■■■■■■■■■�■�rr■ ••■■■■■rr■�■■■ I \\ \ \ \ \ \\ \ \ _ \ \ • \\ \ LU cn ul LL] Lu / ♦ I \ \ \ \ \ \ i ♦ �, LLu u / / / ///// ♦ �� \\ \ \ \\\ �\� ♦ \ \\ ♦ Z J cn SF SSF SSF SSF SSF SSF SSF n/ D SSF SSF�SSF� iv•• \ \� \ ♦� ��•�- O S / / / / / / � � • Q co S / ■ cn 6 / SSF\ - SSF eSF PROPOSED SALAMANDER / _ / I I CD WITH WIRE STREET CDBACKING SS / I I / "v / / w rn Lu 0 W GRAPHIC SCALE � � y �� � JOB NO. I I I / / / / /F s \ / / / \� EXISTING \ _ Ate/ 182150 30 0 15 30 60 120 ) _ APPROVED SUPER yrS S / — O KEY I\ SILT FENCE V �� C� SCALE ( IN FEET) 36 1 rr 30 r -- - TP EXISTING \ \ \ 1 inch = 30 ft. I APPROVED TREE — SHEET NO. \ lk PROTECTION A FENCING — '� L�H0F / _ 000 / GRAPHIC SCALE/SCOTT R. LLINs PROPOSE 30 0 15 30 so 120 \ \ \ C) Lic. No. 035'791 TP � � _ � \ V / REE PROTECTION — _ — --� / — l<) 06/25/20 7D FENCING ( IN FEET) \ ��-- i �Ss10NAL 1 inch = 30 ft. PROPOSED NEW�� \\ \ \ I z ) / \ASS \ \ LIMITS OF \ \ \ \ Lu Lu ASS DISTURBANCE \ASS ASS V A V A \� U \ - — _ \ — — \ n S �, PROPOSED \ \ z SF WITH WIREU) -21 L� \ _ \ _ -- \ \ \ BACKING _ w cn I � O_ w \ . • — — \ \ _ \ V \ \ _ _ -- T PROPOSED \ c' �' \ \ V ASS\ ��� \ __ _ z Q� EXPANDED LIMITS ♦♦ S �y �� \ OP PROPOSED FLAT VDOT CLASS AI COARSE AGGREGATE � w co OV \ \ OF DISTURBANCE ♦ � S ��� �� �V OUTLET PROTECTION W,PEOTEXTILE FILTER FABRIC r o u) w AREA \ � �� V `UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" O Q � I MIN. AT ENDS & ALONG PERIMETER.�BRIC TO OV R P A M t g C �v \ PROPOSED MIN. OF 9" (L=33', W1=4', W2=15',�=18� M.)��/ I H zLu E�CISG APPROVED SUPER SSF SSF \ \ \� w ca ca \ \\ \ \ ,n ILT FENCE WITHIN PROPOSED-- SSF�� SSF \ ����� - PROPOSED SF WITH GREENWAY \ Q \ \ 0. A� EXPANDED LIMIT OF S FPS LIMITS OF SSF WIRE TYP. \ \ A SF \ DISTURBANCE AREA TO BE — DISTURBANCE BACKING V A w \ RELOCATED TO BOUNDARY OF � � W Q NEW LIMIT OF DISTURBANCE ( \ SS -� — A �„ us—� S O 450 LINE PER THIS PLAN �VA�S �� _ S w \ \ EXISTING A\ems �S \V V A \ V A \ \ \ APPROVED LIMITS \ SSF \ \ ,,, ASS\ \ \ � � �A � / OF DISTURBANCE \ \\ ■�■�■■ ��■■-■,■ ■■■■■■_� \ \S\ \ I —PROP SED 18" \ SF— \ D DIVERSION. CONTRACTOR • ■ �` \ \ V �sSF \ \ SHALL ENSURE POSITIVE + + + + + \ SLOPE IS MAINTAINED. \ + + + + + M + + + + + + + + --,c + + + + + + + + + + + = o 0 sSF� BERM SHALL BE \ + + + + + + + + + - + + - + + + + + w \ \ + + + + + + + + + + sSF STABILIZED AS A FIRST \ + + + + + + + + + + + + + - + + + / o N N ■ �'7 I � � \S STEP IN DISTURBANCE: SF + + + + + + + + + + + + + + + + + + �A \\ + + + + + + + - + + + PROPOSED 18" DIVERSION. CONTRACTOR SHALL ENSURE POSITIVE \ \_ \ \ T -++ -+++ I 0 O \ SLOPE IS MAINTAINED. \ \ + -IN— + ++++, I ' � \\ BERM SHALL BE \ \ + + - + I \\ \ M STABILIZED AS A FIRST I I \ + + ++- ++ \ — \ STEP IN DISTURBANCE. \ EXISTING - tcyi APPROVED + + + + �� / O DIVERSION DIKE 7- cy.) C) + + CONTRACTOR SHALL INSTALL A + + + _ _ _ B N R WD R/W DIVERSION ACROSS THE / - - \\� +++ o Z CONSTRUCTION ENTRANCE. DC - /+ + - / \� O Q PROPOSED PAVED / / �- + ++ + + + I \ W N 0 J C E CONSTRUCTION ENTRANCE � (12'x70' MIN.) w/ WASH RACK I - - - - � - - - - ++ + + + + � < � & DOWN GRADIENT DIVERSION + + + + + + + + + + > O \ I + + + + + + + + + + + + + + - — T V &SEDIMENT TRAPPING DEVICE + + + + + + + + + + + + + + + +' / , + + + + + + + + + + + + + + + + + + + + + + + + + + + Ld + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + T + + + + + + + + + + + + + + + + + + J z + + + + + + + + + + + + + + + O I > + + + + + + + + + + + + + + + + V) ' 1 \ s 1 EXIS ING PROVED SUPER I + + + + +— + + + + + + + + + + + + + + M + + + + + + + +—� + + + + w \ s SILT F CE WITHIN PROPOSED + + + + + + + + + + - + + + + + + + + + + + + + + + + + + + + \ \ \ \ \ EX AN D LIMIT OF + + + + + -- - + + + + + + + + Z W + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + \ \ I I \ \ \ DISTURBA E AREA TO BE + + + + + + + + + _ + + + + + + + + + + + + + + + + + + + + + + + + ~ T� w \ \ \ \ \ \ RELOCAT 0 BOUNDARY OF+ + + + + + + + \ + + + + + + + + + + + + + + + + + + + + + + + Q CC + + + + + + + + + + + + + + + + + + + G L9 � SSF NEW LIMIT DISTURBANCE + + + + + �+ + + + + + — + + + + + + - + + + + + + + + + + + + + + + + + + + + + + \ \ \ \ \ \ S \ LIME PE THIS PLAN _ ........... + + + + + + Q SF\ ++++++ +++ ++++++ +++++++ ,++++++++++++ + �' = O LLJ +�+ + +++ ++++++++++++++ ++�++++...++++++ + I \ \ \ \ N \ss� EXISTIN ++ ++ +++++ ++++ + +++ ++ + + + + + + + + + +\ + + + + + ++ + + + + +_+ APPROVED LtMITS + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + SSF SS OF DISTURB.. CE ++ + +++++ ++ +++++ + + + + + + + + + + + + +� + + + + + + + + + ++ + + i Cz I — 5LLI ■■■■■■■■■ ♦_Tl PROPOSED \ --- ---- \ U P SSF / LJJ I CRS;; CONTRACTOR HASE I w U') SSF\ — I I PARKING & SEDIMENT \ � \ _ \ � , - � � ��� � -� � - LOCATION OF I U, PORTA-POTTIES ♦♦ STAGING AREA \ SSF \ Cp U) O II I II� ♦♦♦ BASIN \ --_\� ��� cn I - — I I LOCATION OF 15cy ♦♦♦ \ 1 \ \ 1 / L ��� " 1 = w I I DUMPSTER ♦♦♦ 1 \ \ \ I I / \ I / Lr) — / Lu I I ♦ / �� / W I �i 1♦ \ _ , w / Q Cf) oil ♦♦ / EXISTING APPROVED SEDIMENT'TRAP 4C I \��,_ SSF �' / �' _ ♦� Llj I II I THE FUELING TANK SHALL BE COMPLETELY ♦ g� -- SURROUNDED BY A 2' DEEP, 2' WIDE EARTHEN BERM ♦ \ (DRAINS PROPOSED SEDIMENT BASIN // .�� O I LOCATION OF WITH A HEAVY MIL POLYETHYLENE LINING, OR BE ♦♦♦ / I I / SSF Q O Q PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. ♦ / 4 � PROPOSEb STOCKPILE FUELING AREA THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN ♦♦ \ / SURROUNISED BY •/ / /� ° � FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ♦� ■ ■ ■ \ I ( FENCE--- Ti y, SILT � ENSURE VOLUME CAPACITY IS 10 /o LARGER THAN THE I MAXIMUM VOLUME OF STORED FUEL. N n PHASE I �.�� DRAINAGE �j / w DIVIDE ��_j ■ EXISTING \ �\ _ - i APPROVED ----- c� J I --- -- w III � - _ I \ o T n\ DIVERSION DIKE / 0 Lu _ ° a Cr) JOB NO. \ \ \ 182150 ` / \ ♦ yss MATCHLINE, SEE SHEET 5 KEY / \. � SCALE °p ySs _ 1 "=30' 1 \SS ��♦ SS\ SHEET NO. Ho / \ I \ \ O SCOTT R. LLINS'Z / / yj I I \ c / \ \ \ ` U Lic. No. 035791,� 06/25/20 �4 SIONAL E� v Ln z y W MAPPED -- - ---- O v yy � � S � FLOODPLAIN, / TYP. — — I GRAPHIC SCALE y �y O y yy y y ` u �\ LIMITS OF j \ / J/ _ / ( IN FEET \\ 1 inch = 30 fit. STREAM, TYP. \ y \ ------ _------ O _ _ v -- O _ o DPPROPOSED FLAT VDOT CLASS Al COARSE AGGREGATE DUNDER AYMENTTLE FABRIC TO BE OKEYEDIINTO EX. GROUFILTERIND 9" -_ \ - ----- MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A __ A MIN. OF 9" (L=33', W1=4', W2=15', D=18" MIN.) � "� � - \ --- -� PROPOSED 175.66' PRESERVED - \ \ OF Q115" CL. III RCP STEEP S�PES\ \ \ \ \ y S \ v m @ 1.14% w/ VDOT — — v S _j S STD. EW-1 PROPOSED 100' WIDE VDOT CL. AI RIPRAP \ i �--------- LINED_ \yy EMERGENCY SPILLWAY CREST y n s - ELEV.=396.66'. SPILLWAY TO HAVE 4:1 \ s v \ I / SIDE SLOPES FOR VEHICULAR / TRANSITIONS. • O I 10 WIDE TOP � `\ \ - OF DAM / 7ZLO ELEV.=398'707s\ �� — � -ASS � �� ASS>C S PROPOSED SUPER SILT FENCE \ \ \ \ \ O s \ DA=2.35 AC.- y V - - 950 L.F. SSF S I ♦ ♦ -� �� I / �_ _ \ \ \ \s\ 101 L.F. / 0.25 AC. \ \ ♦ Z� "J u ±4# 40 B -- �♦ \ \ Is 1 \ \ I / i + � PROPOSED VDOT STD. B-1 (Q�48" REINFORCED CONCRETE ++ 1 do 1 ) J ( I +' OPENING) TO SERVE AS 048" ESC RISER STRUCTURE. RISER / + + + TO INCLUDE A CONCRETE FOUNDATION & TRASHRACK. SEE 1 � I I I I ++ + +' ++. SWM DETAIL SHEET FOR FOUNDATION &TRASHRACK + ++++++++++++ SPECIFICATIONS. SEE SHEET 13 FOR VDOT STD. B-1 DETAIL ++++ + ++++ ++++++ & VDOT STD. MH-1 DETAIL FOR THE ESC RISER CONVERSION. +++++ ++ +++ +++J ESC RISER RIM ELEV.=395.66' WITH DEWATERING ORIFICE AT 392.3 . SEDIMENT BASIN CLEANOUT ELEVATION= 390.98'. + + + + PROPOSED 2' WIDE PROTECTIVE SWM BARRIER -----EXISTING, APPROVED SUPER SILT I I I I AROUND THE RISER TO BE CONSTRUCTED AT THE FENCE TO BE REMOVED AND T + + PROPOSED SAFETY FENCE, TIME OF THE RISER STRUCTURE's CONVERSION RELOCATED TO BOUNDARY OF NEW I I I + + + INSTALL SIGNS "WARNING TO A PERMANENT SWM RISER. SEE THE SWM PLAN ♦ PROPOSED LIMITS OF DISTURBANCE + + + + + FOR SWM BARRIER DETAILS. LINE PER THIS PLAN N --� + + QUICK SAND+ +1 1, KEEP OUT" I I I I I I I I I ++ , • • I I / +++++ ++++ 1 • I \ I I ++++ +I N ++++ ++ \ EXISTING, APPROVED ♦ I I I I I 1 —W —SSF SSF SSF F SSFSSFS LIMITS OF DISTURBANCE ♦ I I I I I I I J ------ _-------- Lu PROPOSED I� — — — SF\ ♦ EXPANDED LIMITS TS 1 - �, S ♦ I I 1 1 \ I 1 1 — ♦ -- OF DISTURBANCE + + + W AREA I I CD I I ♦� \ / \ I -- --- - --- ., / i PROPOSED � - LIMITS OF � \ / ♦� �.. � / DISTURBANCE ♦ — \ \/ ` % � ■■■■■■.■■■■■ ♦/ ROPOSED SF 1 WITH WIRE BACKING I \ �yy I I I I / � PROPOSED TREE PROTECTION ■ I I I I I — — / / G FENCING TO BE INSTALLED O \\ I I ■I I I I I I I I PROPOSED / / / / ALONG LIMITS OF DISTURBANCE I I \DD EXISTING, APPROV€ I I I I I I / EXPANDED LIMITS / / c` LINE TO PROTECT PROPOSED / DIVERSION DIKE OF DISTURBANCE / / TREELINE (TO BE MODIFIED) I I � I I I I I I I I I III I I I I I AREA ` �' J I I MATCHLINE, SEE SHEET 6 KEY I II II II____ i i m i i m i i m i i m i I PROPOSED ADJUSTMENT TO EXISTING E DIVERSION DIKE FOR SEDIMENT BASIN B TIE IN CONTOURS z O a - `u Z Lu�L 0 0 O cn u < > � z `u a (� III W 0 < H L u c C Lu ` ce E 0 I 0 W N N ~ l\D if Q N N M N Lu lirm- O ti co ZCY)z M � 0 Q N z 0 N w N Q w > Cn o L Z _j J Q z 0 � V w z LuW z o zQ O w = U I --I � w o�S � z w u o L U cn o U) 0� � J w w ZJ w � V) U) F J w 0 0 JO Q r�C 0 O O N W u F_ J Lu a u) JOB NO. 182150 SCALE 1 "=30' SHEET NO. 8 I W U) U ° D ■ X ■ Do SS ■ 1 FUEL IN THE SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACI IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED. FUEL. MATCHLINE, SEE SHEET 11 Ho SCOTT R. LLINS'Z Lie. No. 035791,1, 06/25/20 �4 �o��s`SI ANAL PROPOSED PHASE II MASS e RADING CONTOURS L4 C C u u O `u H Q 1.2� z ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■■■■ Z w V)Lu � V) J s z J � O _0 Q Q —s s® s I � � g Lu Cf) 1Co V) p, . � w \ W I ° _ S � °C D I 0 �S0 'w'nn Lu DITCH ASSOCIATED WITH ICE RINK — / PROJECT, CONVEYS OVERLAND FLOW AROUND PROJECT AND INTO ' Lu / EXISTING STORM SEWER _ Q N Ln N o � � " ESC N PHASE II 442 \ PRO OSE NEW � • SEDIMENT 442 MITS F ° I DI TURB CE • / BASIN 4 446 / \ ° , D ° C/, � EXISTING / 13.08 aC. APPROVED LIMITS ----- SSF PROP ED L9 \ F WIT IRE • OF DISTURBANCE p P. \ I BAC qG c •Co ° ]Co • X I I N / / ��Q ow / II CYD cj� • — , " o I I • PROPOSED / ' � N EXPANDED LIMITS ICE RINK PARCEL PROPOSED UNDER _ / � 1..1 IOF DISTURBANCE , / SEPARATE SET OF PLANS — N I AREA �— II �I�• N c,nQ z III • — L Q II / 1p — —j < J /--------� 444 0/ I I / i / oui z ------ �w O IV ul) s Cn Q z \ u z o uJ ui �o� i �� o I ` U w ui I P P I - CLu o®Z C/, U) z ■ I o .� w J u) PROPOSED / w o DD I . \ / ADJUSTMENT TO Q� " PERIMETER DIVERSIONui cf)■� ■ ■ ■■■■■■■■■ ■Fm aXWXjLj UJ o ° ° ° a° _ c D n n °5. 5��S S ° S 5 ° S QO& S SAS cc S. 5. S m �r�rn5 5 Da c ° e p ° o...- > °D a ° -°. ° - ° a n a D E- e a n n .p ° - e a p o ^ °" �� ° e c D n ° D.. o.. ° ° ve J w --- --- — �42-- PROPOSED -_ " SSF SF WITH WIRE Q - -- � � 0 � � I I BACKING I � / \ � SALAMANDER SF wiT� wI � o / STREET / / / _ — _ BACKING N °D ° e �I. o o ' J n ^ n ;° °. ° o ° -D- ne o n° o ," D ° ° °B / D D=c p\� w -ISS _is S� -ds ASS -dSS- -dSS ASS -dSS SS ASS S jSS / \ I—�SS� S w � � � � w \ z D SS J ASS �� \ JOB NO. S 5 ® 5 ®o I SS ass EXISTING / 5 —� �y ,438 SSA GRI�PHIC s ALI APPROVED LIMITS —� ys / �/ ss �� A I821Jr0 / OF DISTURBANCE EXISTING s / S �3�\ KEY SCALE J / S 15 30 so 1 � /o. A PROVED SUPER ASS S/ I ILT FENCE T� JSS �s \ 1 _.30' I / ` _ � REM IN FEET ) SHEET NO. D � i / I 1 inch = 30 ft. / FUEL IN THE SPILL. CONTRACTOR SHALL z D I • ENSURE VOLUME CAPACI IS 10% LARGER THAN THE • MAXIMUM VOLUME OF 7�Tm W ■ O N 03579 n - _ F- it -n® \ _ ■ - ---- ---- Lie. o. 1 — - - ---- ---- 'd 06/25/20 �4 ■ — — -- �o PROPOSED STOCKPILE SIONAL E� ■ SURROUNDED BY -- \ MATCHLINE, SEE SHEET 11 SILT FENCE ` � sue, � �� ■ I l� i i� i i■ i i� i i i i� i i� i i� i i� i i■ i i� i i� i i� i/� i i� l l� l l� l l� Dc S,� ■ cn \SSF� • -o_ — _ _ — — — PROPOSED PHASE II MASS Lu S�F GRADING CONTOURS \ • ----JOB— z I O J W ■■■ ■■■ �¢z �■ ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■MEN ■■■■■ MEMO ■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■■■■■ ■ w ?o O Z J J O Q � I Q W w nip Lu ° Lu �■ceO ® D Lu o ,SAll- DITCH ASSOCIATED WITH ICE RINK , PROJECT, CONVEYS OVERLAND FLOW . AROUND PROJECT AND INTO W � IN / ® EXISTING STORM SEWER = o \ \ \ ° � N �O D E S C 442 PRO osE NEW PHASE III 442 � MITS F I DI TURB cE � � SEDIMENT 446 1 EXISTING � BASIN q- APPROVED LIMITS ' 13.08 aC. 446 SSF, PROP ED OF DISTURBANCE SF WIT IRE ° BAc G � � • / P � ti N z X ROW RR4 4 � 0 D fy Q � CIO . PROPOSED _ � 1 � (V ` . -- EXPANDED LIMITS ICE RINK PARCEL PROPOSED UNDER / p o � p OF DISTURBANCE SEPARATE SET OF PLANS CV 4 AREA (D / � I � � 11 cv Q z x. -- 1 C!) ° — / LLI J Q J --------� 444 '77W ■ ❑ o D � ■ i O V / IP 1 Q Z ° x w ° / U O W °o Lu P — a.. z /Ln U) cn I BUI DING #1 O �� L�� � �� a �� � � � BUIL ING #2 / 1 5 I 18 APAR MENT UNITS 14 APARTMENT UN TS / ~ U) N / w w J O xri n ■ S �FF� �L�■ F w O D 4 D D D � x W P - ° ROPOSED / RWD i -- N / I SSF SF WITH WIRE Q0 I y BACKING / SALA ANDER / / ' SSF PROPOSED------' O / THEET / / / _ — � BACKING Lu —_Ass— s Ass jss jss Ss ASS S �S / U \ �� / w Lu V A LuLu iSS \1 JOB NO. �V A $ $ ® $ 0) 1�--, - ® s5 ass y EXISTING �•�• •� s� �w A IBZIJrO °------- APPROVED LIMITS ' / \ v �38 5� GRAPHIC` S AL �� ys / �_ ss v v °. �s5 / OF DISTURBANCE EXISTIf G / S �3 \ KEY SCALE / A , � — 3 15 30 60 � � 120 PROVED UPE • • ASS / �5F V A IILT FEN Ci t T -jSS ass _ 1„.3=0, N FEET ) �— \ SHEET NO. 1 inc = 30 ft. �5��� �� S���S 9A ----PROPOSED SF � I I I I � Z O �� WITH WIRE I I � \ LH 0 � � O ` � / / \ BACKING ■ I 1 1 1 I I III _— � i � I I I I I — — \ \� I I I O� I �� / cv \ SCOTT R. LLINS PROPOSED TREE PROTECTION I \\\ ■ I I I I I I I I I I \ U Lie. No. 035791 � FENCING TO BE INSTALLED e \ : \ ALONG LIMITS OF DISTURBANCE �� �� A \ �A \ \ I ✓o� 06/25/20 LINE TO PROTECT PROPOSED ■ I I I I I I I I I I I I �� i // v TREELINE �, I ZONAL E �� ■ I I I I I I _ — ' / \ MATCHLINE, SEE SHEET 10 `, \ ■ I I I I III I I I — — — , — � � � �A \ ■ I I I I I I I I _ � I I Nm\ I III■II■II■II■II■��■��,■���I \ \ \ ■IIII I I III I I I — — � � � SSF � � � � V � � � v 00� , ' � ■ I I III I � , — � _ — � , — s� _ COS � � � ���:A ` v\ ■I II 11 I I I I _-- i A \ 1 w ■ �11 il� II II vSSF- O / 0 O \ % /- v\ 0 ■IIII , � � � v v U ■ I I I �—ss I I I I I SF w ������� ■ I I F z o ■ - PROPOSED EXPANDED z 0 ■ / \ A ■ , LIMITS OF , / \ \\Lu to■ I SUMP AROUND STORM INLET - DISTURBANCE / O /// / O O O �\ O a a ll ■ w ■ PROPOSED UNDER SEPARATE SET ■■��� ■ OwasF PLANS / / \ \ �, w v \ 0� / \ z Q EXISTI STORM \ \ \ \\ n \ \---- - \ \ H ~ w STR URES FROM 00 1 A OVED WPO PLAN \ \ --- \ \ v \ \ \ �n / TO REMAIN \ O O EXISTING w APPROVED \ \ O ` \\ \ H EXISTING STORM INLET V O / A \\\ \ \ SUPER SILT FENCE TO \\ I \ o RECEIVES FLOW FROM _ V A \ REMAIN \ \ A \ W Q 1 O \ EXISTING DIVERSION O V A \ \ o DIKES AND CONVEYS TO \ O _ — EXISTING SEDIMENT \ w \ \ SSF SF \ O \ L 442 \\� BA#4 i \ \� �SS� \ \ \ - - ---- \ (,n �\ O \ SF F � A \ � \ Lu 440 442 ♦ VA \ ,� v v \ \ ♦ �' \ 1 \ \ v u _ — �_ — v O \ O \ / ISTI P \ O \ O XNG, APPROVED LIMITS OF \ O I I I 1 DISTURBANCE LINE A4Q e ♦ �37� D p n 446 1 ° I L\ \ \ \ / — \ WETLANDS, TYP. \ I / yL9 D- EXISTING \ I I I I I I I I I I I I I yco I I II \ yyy C6 / ♦ / APPROVED O � DIVERSION DIKE y n � \ � � e °o D °o ♦ / � vyyyyyyy ;I _ \YJ��\ � W a° � — C) EC U ° B °e -AIP )ER 0) I WNW ICE RINK PARCEL PROPOSED UNDER \ / / / \ \ ` \ z - $e° SEPARATE SET OF PLANS I� // �� O \�\ ■ r \ L J 1 u 4.e,- IP — © \ \ I I ■ 1 I J J U � ■■■ ■■ LL' � W fl \ TS \ \ � EXISTING,`, A \ L9O APPROVED �: j U O I SEDIMENT WDC O \ I BASIN #4 .'. j 1 z v I I I I I I I� \ \ • x Q z w b° � v V I I IIII I I, , ,, p ,, �, • :. A � �� 1� D Lu 06 I I \ W o Cn z _O / / / �♦ \ \ \\ \ \ \ O \ \ ��� s \ w J O D - / O O/ / \ O\ \\ \ \ ♦ \ U) _ / / / �� ♦ \ O ♦ OI w F ssF SSF ssF ssF s / / / \ // / �1/♦ I I ♦♦ W D y ° SF / / / / / / w �, v �� \ \ ♦ / Q co 0 ss"_ J ssF SSF PROPOSED _ SALAMANDER SF BWITH ACKING STREET�� / / I \ / N-71 m w S ^p w u) �A �y JOB NO. GRAPHIC SCALE I I / / / / s \ v O / v \� I / O EXISTING 1 �j\ 182150 30 0 15 30 60 120 I I \ "' APPROVED SUPER _--�\ _ O KEY I SCALE I ( SILT FENCE / O\ O — — ( IN FEET) I I - TP EXISTING \ \ \lk O O 1 inch = 30 ft. I I I ---- \ APPROVED TREE 370 \ SHEET NO. PROTECTION \ \ \ \ \ - - \ \ 10 FENCING --' � - -\ 00, 1000 1000, ` GRAPHIC SCALE / SCOTT R. LLINS'Z 30 0 15 30 60 20 \ \ \ \ U Lie. No. 035791 , TP PROPOSE \ .,� / ' _ _ / 'd� 06/25/20 REE PROTEC ION �, � \ / or Cs / FENCING A �ssIONAL E� � ( IN FEET) / _ / � �- \ 1 inch = 30 ft. _(-nass — \ \ / \ASS PROPOSED NEWS ` /" \ \\ \ - U) / \ LIMITS OF ��. Lu z _, A A '�V DISTURBANCE \ \ _ -- — S 3ss ASS � \ — — 0 \ �u� SF \ \ PROPOSED z SF WITH WIRE \ w U�V A A U� BACKING / w z (D �450 ■■ \ \ \ /�� �\ ♦♦ --art# ���♦ ASS\ �\ PROPOSED FLAT VDOT CLASS Al COARSE AGGREGATE � m o Lu \ V / _ ■ ASS V OP OUTLET PROTECTION w/ GEOTEXTILE FILTER FABRIC o U) w uo i \ \ � UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" O z Q I MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A 0 Q xx \ A ♦\ \ v PROPOSED MIN. OF 9" (L=33', W1=4', W2=15', D=18" MIN.) > z m T- - WIRE ` \ � Q \ \�♦\ \ \� PROPOSED ` GREENWAY R \ SF WITH LIMITS OF WIRE TYP. H w �5x ��' ��� A� \ A ♦\ \ n _ DISTURBANCE \ \ ♦\� \ o i �' v ass ss s F- \ ♦\ �5 s ASS \ ASS Lu \ \\ \ �_ ` \ \ \ I \ \Lu \ ■ ■ ■ m MANUUP \ \ \ass \ \ ass s 1 PROP SED 18" \ \ - - - - - - \ DIVERSION. CONTRACTOR- cn ■ \ \\ \ DD- SHALL ENSURE POSITIVE \ �� + + - ■ SLOPE IS MAINTAINED. �� n CD CD ■ / \ \ \ \ BERM SHALL BE \ + + + + + + - - -++ +++ - - + - - - ". ��� [ \ ■ \ STABILIZED AS A FIRST ++ ++ + + + + + + - + + + - + + + o - - + J' - N lD STEP IN DISTURBANCE. - 1 PROPOSED PHA E II MASS / GRADING CO TOURS PROPOSED 18° \ + - ++ D D DIVERSION. CONTRACTOR � \ + + + \ _ / SHALL ENSURE POSITIVE - + + + - I O \ - - - - A - - + ++ ++++ - \ - SLOPE IS MAINTAINED. \ \ BERM SHALL BE �� - - -kD - - - + + - + + - C�(D \ \ - + r - + + + + + I \ \ + + STABILIZED AS A FIRST + + I STEP IN DISTURBANCE. / ' V - -++ + +++ - �� - /� / 1 � + ++ z z \ \ \ �/ + - ++++-- M + + + + + , C) / Nt J �+ / r \ — —_—- — \ + + - -+ + + + - - - — -- \ CONTRACTOR SHALL INSTALL A R WD R/W DIVERSION ACROSS THE / \ \ / + + + O - + + + + + i} CONSTRUCTION ENTRANCE. A + ++++ + + + ++++ / PROPOSED PAVED \ \ \ + + + -+ + + +- - - \ N(D \ �� C E CONSTRUCTION ENTRANCE- (12'x70' MIN.) w/ WASH RACK \ I & DOWN GRADIENT DIVERSION & SEDIMENT TRAPPING DEVICE - - - - - - - - - - - + + + + + + + + + Q a LLi U) - - - - - - + _j < BM ++++ ++ + -- + ++ ----- — --- \ (n +++ ++ + ---------------------- ---- - ---- _ ++ — Bm +++ \ I I I W06 \ \ \ \ \ \ + + + + + + + \ + + + + + +++++++ + + ++ + + + + + + + + + + + + + + + + + + - - - - --- + + Lu V \ \ \\ +++ + +\ +++++ ++ + - +++, Q f ❑ \ \ + + + + + + + + + + + + + - x - z \ + + + + + + + + + + + + + + + + - - - + LLI N = \ + + + + _ \ \ + + + + �k + + + + + + + + + - 1\ - I 1 1 + + + \ + + + + + + + + + + + + - W +. = W ♦ \ ESC \ ++ ++++++�+++ ++ LV----- w U ° PROPOSED ____ ----------- cn CONTRACTOR + + + + + + + + + + CO CTOR -------1 � - uj ♦ \ + + + + + + + + ---------- o- LOCATION OF PARKING & � PHASE II � + + + + + + + + + + 06 - n ♦\ + + + + + + + + z ♦ PORTA-POTTIES STAGING AREA SEDIMENT + +++++++ + ++++ + ++++ U Cn + + + + + + + + ♦ \ BASIN B �- \ + + + + + + + -- J O ♦ ui LOCATION OF 15cy \ \ \ +�++ \ +++ + - - \ - - \ - - - - - - _ I J In DUMPSTER 11.27 aC. \ \ \ \ ++ +++++ +++++ -- - -,- - - ui �I ---------- ---- ,_ X— / Lu THE FUELING TANK SHALL BE COMPLETELY EXISTING APPROVED SEDIMENT TRAP 4C i� / \ \ / /_ w � O W \ % SURR UNDED BY A 2' DEEP, 2' WIDE EARTHEN BERM / (DRAINS TO PROPOSED SEDIMENT BASIN B) / j \ / - Io z y WITH HEAVY MIL POLYETHYLENE LINING, OR BE i J\� Q o LOCATION OF PLACED N AN IMPERVIOUS OPEN -TOP DUMPSTER. -J ® FUELING AREA THE PROP ED BERM OR DUMPSTER SHALL CONTAIN I l \ / / f \ j Q SCf)_ FUEL IN THE` SPILL. CONTRACTOR SHALL I I Q J T I ENSURE VOLUME CAPACI IS 10% LARGER THAN THE \ \ / / j I O M I LLJ ° ■ MAXIMUM VOLUME OF ST FUEL. Lu I \ ■ \`�� err / o ■ / �� u A \Lu J D °o ■ I I■ I I■ I I■ I I■ MATCHLINE, SEE SHEET 9 ■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ I I■ PROPOSED PHASE II MASS GRADING CONTOURS PROPOSED STOCKPILE\ SURROUNDED BY SILT FENCE KEY w u) JOB NO. 182150 SCALE 1 "=30' SHEET NO. 11 6� \ \ I \ \ \SCOTT h. C LLINS ° \ I \ c / \ \ I U Lic. No. 035791 06/25/20 I01VAL E MAPPED ---------- - - FLOODPLAIN, TYP. / J GRAPHIC SCALE s LIMITS OF X, / _ - /� ` ( IN FE T y y 0 / 1 inch 3 ft. y Q STREAM, TYP. � - � y y O 1 - — / O O O \ I - O o \\ O O \ -- �-- o _moo � �, y yy m S w PROPOSED FLAT VDOT CLASS AI COARSE AGGREGATE in cn OUTLET PROTECTION w/ GEOTEXTILE FILTER FABRIC , \ J / --- - --- y UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A �� �_ i �A� --- - MIN. OF 9" (L=33', W1=4', W2=15', D=18" MIN.) ` / - - -- ---- --- - \ — - _ ` \ w -- H PROPOSED 175.66'\ ✓ \ ° ' \ y \. \ _PRESERVED OF 015" CL. III RCP —-----_-----STEEP\ \ y y J I � — o SL�PE�Lu \\ \ @ 1.14 /o w/ VDOT P. \� \ \ \ \ -J S 3 S STD. EW-1Ce � _ y \\ \ I i PROPOSED 100 WIDE VDOT CL. AI RIPRAP y y y y I \ \ I\ _ — LINED EMERGENCY SPILLWAY CREST \ \ — v v y s \ y v \ / ELEV.=396.66 . SPILLWAY TO HAVE 4:1 �— —/� �� — y � j \ \ / SIDE SLOPES FOR VEHICULAR �� — -4000' -- \ TRANSITIONS. - _ \ \ \\ O yy 1D'_WIDE _TOP \ 0.— i OF DAM -ELEV.=398' ` — ` / - --- - i �ss ` \ O N \ \ ` w � � t� ASS ��� \ \ � O \ ` � � _ PROPOSED SUPER \ \ ASS SILT FENCE \ \ \ s \ _ _ /, _ _ \ \ \ \SS\ ` — 950 L.F. SSF \ \ 101 L.F. / 0.25 AC. \ "v, Un -- �— ��ass//� // �v° � � � ° � �° \QD CY' Cn % � / -- - � _ ♦ � � S ass — \ / � � \ \ \ \ � \ \ � \ \ . \ � N z / + ♦ \ / / \ \ \ \ 1 \ SS \ �\ \ \ \ \ \ \ I I O LL ♦Aw \ \ I I I I \ \ \ \ \ I N _ ++++ ++ PROPOSED VDOT STD. B-1�(048" REINFORCED CONCRETE + + + + + �- OPENING) TO SERVE AS 048 ESC RISER STRUCTURE. RISER ■ / Q +++ + + + TO INCLUDE A CONCRETE FOUNDATION &TRASHRACK. SEE = / I \ I I I I 1 I � I I cs / N J B q + + + + + ■ SWM DETAIL SHEET FOR FOUNDATION & TRASHRACK / I 1 I I c� c� \ \ I w VI ++++++++++++ ■ SPECIFICATIONS. SEE SHEET 13 FOR VDOT STD. B-1 DETAIL / �— I I /� I c c J + + + + + ■ & VDOT STD. MH-1 DETAIL FOR THE ESC RISER CONVERSION. J Q J ... ++ ++ +++ +++ ■ ESC RISER RIM ELEV.=395.66' WITH DEWATERING ORIFICE AT 3923. SEDIMENT BASIN CLEANOUT ELEVATION= 390.98'. + + + + + + + ++ + + + + + I + +++++ ++ ++ ++ PROPOSED-2'_WIDE PROTECTIVE SWM BARRIER I I o \ I I I I I I w + + + + + + + + + + + + ■ AROUND THE RISER TO BE CONSTRUCTED AT THE + a .. + + + + + + L9 + ++ +++ +++ +++ + TIME O1 F THE RISER STRUCTURE's CONVERSION + ++ + + + ROPOSED SAFETY FENCE, E SdAN+ TO A PERMANENT SWM RISER. SEE - ♦ �I 1 °I I II II I I III II I I I I I I I O + + + + INSTALL SIGNS "WARNING■ + + + + + + + + + + + + QUICK SAND, KEEP -OUT" _ DETAILS. + + +++ ++ +++ M MEEMEMEN IN MENEM � ++ ++++++++++++ to ~ Tz� w +++++�z- LLJ _---- ♦ I 1 TSI- ++ + +++++ ♦ I I I I I I I / 1 1\ U ui +++++++++++++++ +++++++ — _ i ++++++++++ +++++++ WW1+++++++ ++ ---_ --- ♦ / I w Lu co++++++++++++++ \ +++ ++++++++++ — — \ + + + + + ++ + + + + + + ++++++ ++++ - _ - _ +++ ++ ++ ++ ++ + +++ \ w O + w J+++ + +, +, + + ++ ++ ++ ++ ++++ +++ +++++ + ++ ++ ++ + + +++ ++ _ \V / / (� +++ + ++ + ++ + ++++++ ++++++++ +—LuI ° / — — _ _ — ♦ \ \ \ / LIMITS OF / \ IPROI OSED I I I I I I I \ w — _ \ ♦ �\ \ I I / � � / / I/ ° I / , I I I I \ \ \ � � (A DISTURBANCE I I I \ w / / I Q �//./�/�/�1:;- ��I /°/ ■II I D II II III I I II II I III IIII II I —� /_� / �Z \ o ROPOSEI F E■ WITH W�IR BACKN DMWC I \I I yy \ \ ■ I I I I I I III _— — ° i I I° ° \ I I Lu i ■ I I I I I I I I I I — i / / / i PROPOSED TREE PROTECTION I \\\ \ w FENCING TO BE INSTALLED I ° \ \ 0 w --- ■ I I I I I I I I I I I \ i — — / / / / ALONG LIMITS OF DISTURBANCE' LINE TO PROTECT PROPOSED \ \ \� JOB NO. ■ I I I I I I I I I I I � — i � / / / / / TREELINE , I \ \ KEY 8 �21 I50 ■ I I I I I I I I I i _--- ; MATCHLINE, SEE SHEET 10 SCALE ■ II I I I III _ — _ �I �I �I �I �I �I �I �II�LI�I �I �I I �I ■IIII II III I II ---' —' — \ I I � F \\ 1 =30 ■ I I I I I i / `�'F� / V SHEET NO. ■1111 II III I II � ,, �� ,--- � i \ � ■ I I 1 1 I I I / /F / �/ / \ \ /- 12 I I S o \ 1992 3.36 TYPICAL ORIENTATION OF TIREA T1llENT - 1 (SOIL STABILIZATION ELANKE T) SHALLOW ON SHALLOW SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPLIED ACROSS THE SLOPE. BERM WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, - BRING THE MATERIAL OVER THE BERM AND ANCHOR IT BEHIND THE BERM. - ON SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION. TURN THE END UNDER 4" AND STAPLE AT 12 INTERVALS. 12" Source: Adapted from Ludlow Products Brochure III - 361 IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AVOID JOINING MATERIAL IN THE CENTER OF THE DRCH IF AT ALL POSSIBLE. Plate 3.36-1 Sediment Basin'B' Design drainage area (acres) 11.27 basin Volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) 387 786 0.0 388 1,387 39.7 390 3,568 217.0 391 5,310 380.3 392 8,605 635.6 394 13,155 1435.6 396 18,066 2587.1 398 23,607 4126.0 wet storage: wet storage required (cy) (67*11DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available Volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) I2yr 5.2 Q 2yr I25yr 7.5 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment (ft) diameter of barrel (in) APPROVED 'WET POND 4' PLAN �C A SCALE 1"=30' APPROVED RIPRAP LINED INLET CHANNEL PROTECTION \ APPROVEDFOREQAY \ \ \ \ \ \ BOTTOM ELEV.=380.0- Cis �A o 0 � CO M�NAGED STEEP AP II ROVED POND I I I SOPES, TYP. SOTTO E17EV.=II 3581.0' PPIOVED 1p' WADE AFRANGING VAT 0E'TY BENCH 366' & 366 20',PER WP 20170003I APPROVED 1-2' WIDE TOP OF DAM ELEV.=372.0' APR ROVED 10' WIDE AQUA T BE CH \ \ (2ANGING IN ELE TI N B TW EN & 366' PER \ PO:3'W�IE 17000 7. 'APPROV�D I / RIPRAP LINED EMERGENCY SPILLWAY CREST ELEV.I/ 370.20 (WPC �1700037). \ APPROVED'STM X-02' DRAINAGE STRUCTURE (RIM=372.20, INV IN=362.80, INV. OUT=362.70 (LOW -FLOW), INV. / APPROVED 'STM X-01' (POND 4 072" RISER) OUT=363.60 (PRIMARY FLOW, 60"). RIM=369.80 STRUCTURE TO SPLIT FLOW TO PROVIDE ' / NV OUT=363.30 (060" RCP) ADDITIONAL DOWNSTREAM WATER 06" LOW -FLOW ORIFICE INV.=366.00 QUALITY TREATMENT. SEE WPO / (TO BE REPLACED WITH NEW 03 ORIFICE, INV.=366.00) 201700037 FOR DETAILS. 09" MID -FLOW ORIFICE INV.=367.25 (TO BE REPLACED WITH NEW 08" ORIFICE, INV.=368.75) / 76-J CID . o , J _ 1 MIN. 1' WI SPILLWAY 2' WITHOUT DESIGN HIGH WATER (25-YR. STORM ELEV.) MIN. 1.0' DRY ' STORAGEJ. " WET " STORAGE ...... .......... ..... . SEDIMENT CLEANOUT POINT (• TO 34 CS`.TYORRAGGEERRREDUCED 755 design high water 392.30 top of dam (ft) 755 top width of dam (ft) 383 bottom of basin (ft) 390.98 approx. bottom dimensions: 1.3 upstream face slope: downstream face slope: 755 baffles: 395.66 length of flow, L (ft) 1610 effective width, We (ft) 8.0 L / We (baffles required if < 2) 10.0 collars: depth of water at spillway crest (ft) 0.45 slope of upstream face (Z:1) 5 slope of barrel (Sb) 26.4 length of barrel in saturated zone (Ls) 41.8 number collars required dimension of permanent collars 1.00 emergency spillway: 48 required capacity (Q25-Qp) (cfs) 40.0 bottom width (ft) 72 slope of exist channel (%) 175.66 minimun length of exit channel (ft) 10.7 crest of spillway (ft) 15 STREAM,- TYP. d APPROVED 69.11 OF 060" RCP x` AT 1.59% WITH CONCRETE \ \ CRADLE TO SERVE AS WET POND \ 4's BARREL (WPO 201700037). APPROVED VDOT STD. ES-1 �A UNDER WPO 201700037. Z cyl %I / GREEN TYP. / TYP. / / \I APPROVED 30' LONG CLASS I RIP -RAP OUTLET PROTECTION UNDER WPO 201700037. > w 9-1. B-7 I w I i1 r STEPS I(AS REQ'D.) 1 1 .*I X D J $-1 MONOLITHIC RISER CREST DEWATERING DEVICE CREST OF EMERGENCY SPILLWAY 396.66 398.00 10.0 387.0 72'X27' 5:1 3:1 NO 215 80.01395 2.7 YES 9.66 5 1.14% 91.09 2 6.6'x6.6' YES 0.0 100 1.4% 48 396.66 WEEP HOLE cAS RE01C.? L,w J LL = i�g PROPOSED LEVEL II 'SEDIMENT BASIN B' DETAIL SCALE 1"=30' S - x PROPOSED,FLAT VDOT CLASS Al COARSE AGGREGATE OUTLET PROTECTION w/ GEOTEXTILE FILTER FABRIC UNDERLAYMENT.. B FABRIC TO BE KEYED INTO EX. GROUND 9" MIN. AT ENDS & \ F x x x x x x x x x x ALONG PERIMETER. FABRIC TO OVERLAP A MIN. OF 9" (L=33', 1 \ \ \ W1=4% W2=15', D=18" MIN.) LIMITS OF STREAM, TYP. � - xx X x X X x X x X X X \ x x x x x „ x x G'FA IC 2'� =2' x X X X x X X X x X X X X x X X X \ 10' WIDE TOP OF DAM ELEV.=398' -7 . / PROPOSED 175.66' 0 15" CL. III RCPO° 4.24 /o w/ VDOT STD. EW-1 x x xxx xxx x x x x B o x X X X x PROPOSED 100' WIDE VDOT CL., Al RIPRAP LINED EMERGENCY SPILLWAY�CREST ELEV.=396.66'. / \ SPILLWAY TO HAVE 4:1 SIDE SLOPES FOR VEHICULAR xxx / TRANSITIONS. e / Z-1 �� y x x x \ - � S x X x x x X X x x \ • x x x x x x x x ��% x � A � -, � \ x. 'x � x � x x\ x X x X X X x x 4 ,.\� .<. x x \ (/�• -1 x � �... PROPOSED VDOT STD. B-1 (048" REINFORCED CONCRETE OPENING) TO SERVE AS 048" ESC RISER x x x x x x x x x x \ x -- x x x x x x x x x x x x x x x x x x Xxx x x x x` \x s. x% x x x x x x x v xxx } xxx\x X-------------- w l'xxxx - x x x x x x x X�x N� STE S_ St x X X X X x x x x x x x x x r 5TEPg (A5 RE4'D_) SWEEP HOLE (AS REIOV.) W p 6" x 6" - W5,5 >t 05,5 WELDED WIRE FA6RIG OR EQUIVALENT fREh 2" •" d FOOTING D + B" + 2x DOGHOUSE W 17H FOOTING NOTES; 1. SEE GENERAL NOTES FOR ADDITIONAL IWORMA.TION 4N WEEP HOLE5, STEP REDUIR'EMENTS, 11HII (LIN. FT, FOR uA NHOLES) DMENSIONS, ETC, 2. ALL BASE UNITS s E TO BE IN ACCORDANCE WITH THE REOUIREMENT5 OF AA5HT0 M199. 3- CONCRETE SHALL BE 4000 PSI. WHERE PENIN ,ORE REQUIREFOR PIPE THEY HALL F3E FRRME RILLE OR NEATLY 7 a �s a a s s a, D a, cu AS APPROVED BY THE ENCINEER. THE CONTRACTOR SHALL FURNISH THE FJ&RICATOR WITH THE ANGLES BETWEEN CENTER LINES. THE INVERT ELEVATIOvS,AND THE SUE OF ALL PIFE5 TO ENTER THE MANHOLE. HOLES ARE TO BE A MININUM OF 4" TO A MAXIMUM OF 9" LARGER THAN THE OUTSIDE DieWETER OF THE PROPOSED PIPE. 5_ DIMENSIONS SHOWN ARE MINIMUN. ACTUAL DIMENSIONS MAY VARY WITH MANUFACTURER. 5. "DI" 15 NQUINAL DIAMETEIt- 7, IN THE EVENT THE INVERT OF THE OIITFALL PIPE 15 HIGHER THUD'+ THE 6OTTi?M 4F THE STRUCTURE. THE INVERT OF THE STRUCTURE SHALL BE SHAPED WITH CEMEWF MORTAR TO PREVENT STANDING OR PONDING OF WATER IN THE STRUCTURE. S. TONGUE AND GROOVE JOINT APE TO 9E OF FAO NCATOR'S QESICN 11EETINC VDOT APPROV&_ i �W AL7ERIgATE JOINT (DETAIL DIMENSIONS D k MINISI�II,I " YINIMAUM SUGGESTED MAX. PIPE SIZE AE60L11TE MAXIMUM �k 316.. 4 1I 6" 18.. 211, 48" 50 6„ 24„ 27'' " 60 5II a.. 361I 4211 7211 46„ c�II 84" 7„ all5Q„,. 961, 8" N II 66 7211 10811 911 a" Tall 41, 1201, Fill 811 9011 g911 125" 101 J " 11 96" 102., 144" I &" ICB" 120" JOIN ARE TO 0E SEALED 11ITH MORTAR. D-RING CASKETS, OR BI,T"L ;�U68ER, 3k DEPTH "H" OF _3$" DIAMETER SASE UNIT RESTRICTED TO 4'-0" MAXIMIUMI_ ONE THRQUIGH PIPE ONLY- (ME PIPE ENTERING a1D ONE PIPE EXITING STRUCTURE) A COPY OF THE ORIGINAL SEALEC AN-) SIGNED pRAl41NC, IS CIN FILE IN THE CENTRAL OFFICE- roaT DN 7 AN D AR D PRECAST BASE U N 1 T SPE REFERENCE ROAD AND IBRIOGE STANIDARDS SHEET 1 OF 1 REVISION D ATE 105 wIRGINIA DEPARTk1ENT Q�F TRA1JDP"RTATj0N 302 103-11 08l13 STRUCTURE. RISER TO INCLUDE A CONCRETE x FOUNDATION & TRASHRACK. SEE SWM DETAIL SHEET x x x FOR FOUNDATION & TRASHRACK SPECIFICATIONS. SEE THIS SHEET FOR VDOT STD. B-1 DETAIL & VDOT STD. x x / 1-IH-1 DETAIL FOR THE ESC RISER CONVERSION. ESC x x x x RISER RIM ELEV.=395.66' WITH DEWATERING ORIFICE x Ste' AT 392.3'. SEDIMENT BASIN CLEANOUT ELEV.= 390.98'. x \ S-� \\� BM x x x x x xSS jSS \\\ x x .x ASS \ x % x PROPOSED 2' WIDE PROTECTIVE SWM BARRIER x AROUND THE RISER TO BE CONSTRUCTED AT } THE TIME OF THE RISER STRUCTURE's CONVERSION TO A PERMANENT SWM RISER. SEE \ THE SWM PLAN FOR SWM BARRIER DETAILS. vX PROPOSED SAFETY FENCE, \ INSTALL SIGNS "WARNING QUICK SAND, KEEP OUT" SEE STANDARAD SL-1 FOR APPLICABILITY OF SAFETY SLABS_ STANDARD MH-1 NOTE FRAME 11 COVER THE TOP 4F mA1,0wRY IS TO BE LEFT 5•LIFFICIENTLY LOW TO PERWIT PRD?ER ADJUSTMENT OF OOVER AND FRAME TO GRADE BY THE USE OF MORTAR OR BRICK AS DIRECTED BY THE ENGINEER. w p P, La I- - P) FLAT SLAB TOP AS DETAILED r c. 4N STArIbARD 7-MH-2 MAY DY r WEISTIT UTED FDR TAPER EO - SECTION WHEN APPRUVEO 9Y THE ENGINEER_ �a 6"A IF�A w 11 REVEL 451 cc HW M �> �nE+1iw. ��i1Y� OVAF4 AIMIMMMIRL �I�ILL�ILL■ILL�ILLLr jm2 :====� ■ ■ *6iG%l. 7991Ye 6Jli 1 MMM ■ -- 4 a HALF PLAN VIEW HALF SECTION A -A (WITH FRAMF AND COVER REMOVED) BRICK CONCRETE NOTES: 1.OUANTITIES SHOWN ARE FOR MANHOLE MTFMT PIPES. THE AMOUNT DISPLACED BY PIPES IMLPST 13E DEDUCTED TO TABLE OF QUANTITIES O{PTH 13RICK MANHOLE COINCRI:TE UANHOLE I BR 'Ix CONCRETE CONCRETE FEET THOUSANDS 011. YARDS CU. `YARDS + 0.5 9.70, 1.4�7 3 0,7 0.785 1.8$8 s 0.9 o- �� 1.961 7 1.0 4.78� 2.923 8 1.2 0.76S 2-485 9 1.4 0.79`- 2747 10 1_19 c-?== DDT -1 1-9 4.97P. 3.45-5 1? 2.2 4.970 3.1117 1{ 2.5 0.970 4.179 14 2,8 2-972 4.541 15 3A 4.903 115 S.z v 9 5,265 17 L 'i d,0 32 "gREMENT SP'DIfICATISI,, RFFFP � MANHOLE FOR 1 " - 48" PIPE CULVERT 30 VAGINIA DEPARTMENT OF TRANSPORTATION 20115 ROAD SL BRIDGE STANDARDS OBTAIN TRUE 4UANTITiES. 2. A BASE THICKNESS OF 91, WAS USED IN COMPUTING CONCRETE QUIINTITIES- 1 INCREMIEN15 TD BE RIDDED FOR Ek;H ADDITIONAL FOOT OF DEPTH. 4. MATERIALS MAY BE BRICK• CONCRETE OR APPROVED CONCRETE MANHOLE 131-4CFt. 5. IF BLOCKS ARE U5ED THE MINIMUM THICKNESS OF SAME IS TO BE 5". OTHER THICKNESSES ME TO CONFORM TO WALL THICKNESS SHOWN FOR CONCRETE_ $,ALL CONCRETE TO BE CLASS A3- 7, WHEN SPEGAFIED ON PLAN5 THE INVERT 15 ID BE SHAPED IN ACOQRIDANICE H7TH STANCARD I$-1. THE COST OF FURNISHING ANQ PLACING ALL MATERIALS WtIDENTAL TO THE SHAPNHG IS TO BE INCLUDED IN THE BID PRICE FOR THE STRUCTURE - ROAD AND 9RI❑GE S7A1.IDARIJ3 REVISION DATE SHEET 1 OF 5 1Q$-41 OPN/- SCOTT R. LLINS U Lic. No. 035'791,� 06/25/20 �� �ssIONAL E��1 z O Iti CL J 1 Z U LU co O � z o � I J a . Ln LU z i V 1 1 I I 1 1 W ' I 0 0 W N N Q N N � N � co N z C) � o ■�� rn N(D Q � w J J Q J Q W T� J 0 O z � 0 0 U 1 I -I U w U z '-'j w U) LI,J W w = J un CZ z vJ J w 0 p w < O r V 0 o N M W Lu J H � w ­1 LU a � JOB NO. 182150 SCALE AS SHOWN SHEET NO. 13 I � I 442 ;z- _ THIS PORTION OF STELLA LANE IS \ 1AND PLAN ISCCURRENT� UNDER REVIEW A D���/ J I III I I III �� NO MODIFICATIONS ARE PROPOSED TO —� THIS AREA & ITS TREATMENT. _— � II � I _ II ��� ■ v II III I I THIS AREA (BLOCK 413) RECEIVES STORMQUANTITY WAQUALITY TREATMENT TER J I I I APPROVED WPO D20 800051. NO MODIFICATIONS ARE PROPOSED TO THIS AREA & ITS — I I I I STORMWATER QUANTITY TREATMENT. THE W I I ATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL OF LS 11. I I II �I o t�J 454 PRE- AND POST -DEVELOPMENT SUBARE AND OUTFALL SUMMARIES / ' T� / � I ::..:. \L o� Pre-Dev. Subarea Post-Dev. Subarea Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 O �� (Point of Interest) (Point of Interest) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection SIC — OTT R. LLINS O �— ;/— U Lie. No. 035791, \ 06/25/20 i 1 �''ss -, ONAL MAPPED FLOODPLAIN, Oo —_ 0 0 0 0 —� PROPOSED CONCENTRATED \ �TFALL #2 TO POI #2 ��— \ \ w \ h \\ - \ / / w / - LU 100' OF OLF w/��E�160' OF CONC. FLOW w/ELEV.=2' 'CD 425' OF CHNEL FLOW / / �� �_ / ���� 1 �1. — �� w \ U \ PROPO�@ w PRE DEV. LOCATION OF PROPOSED V&F - ND - —1 ■ ° °' / j z J J WET POND B' TO REPLACE �, I i I I I I'', Q SUBAREA B I / O O �, Q I � UPSTREAM ST-4C — J o ■ ■ r CN=60 LU N ac. \ /�� � —� I LU Tc=0.27 hrs. \ \ ��� ��I 1, L Q �� PROPOSED EXPANSION OF THE APPROVED LIMITS OFLn �� o O DISTURBANCE UNDER WPO I LU APPROVED � � � � � � �� � / I \ � 0 201700037, AMENDMENT #2LU - - —' � � 1 I�� W I APPROVED A DIVERSION � � NOTE: � \ THIS PLAN PROPOSES TREATMENT THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE � w FOR THE F FUTURE DEVELOPMENT I I I // J TOWN CENTER, APPROVED LOCK 5 & APPROVED SALAMANDER I � O TOWN CENTER. I / / / S COVERS THE REQUIRED HAUL / ROADS, BUT EXCLUDES BLOCKS 8A, 8B & 4A SINCE THESE AREAS \ \\ / I ' w ° RECEIVE WATER TREATMENT UNDER SEPARATE / PLANS THIS 35.98 Uac. LI ITS OF DISTURBANCE BOUNDARY MP DEFINES THE VRRM BOUNDARY FOR WATER QUALITY \ \ \ I 1 REQUIREMENTS ASSOCIATED WITH THIS PLAN (i.e. THE FUTURE TOWN CENTER, BLOCK 5 &SALAMANDER STREET). APPROVED LIMITS OF ` OO DISTURBANCE UNDER WPO 201700037, AMENDMENT #1 l i �II I I I II l 11�_ O O LU-- WETLANDS, 100' OF OLF w/ A EL —1.5' \ \ / \; I ( TYP. 950' OF CONC. FLOW w/ A LEV.=10' OF CHANNEL FLOW DOWN THE E ANKMENT \ 1 ERENNIAL STREAM, TYP. _ J 11 I I I I I I I I IIIII I II m I I I J I • PRE-DEV. / \\ 03 SUBAREA A \ I I I l/ l/ �� \ I G \ \\\ O \ \\ \ \ o \ I ■ 16.25ac. O� \ \ \ \ I I I I l A ��II II II SOUTHERN &WESTERN PERIMETERS CN=60 I I \ o I OF SUBAREAS A &BARE DEFINED Tc=0.41 hrs. o I IID I 1 BY APPROVED WPO 201900004. I \\ r I I \ \■ IIIIL9 ( ) I \ I \ > �ir�, o \ \ / I I I 11 / \ I Z z I III I / / �L ..... \ \\\ \� III h I �...._ OCATI N F • ,,,,< °O \ \ -'J 1 \ se J ) I I1 1 \ THIS AREA (BLOCK 4A) RECEIVES STORMWATER_- II I I \ QUANTITY AND QUALITY TREATMENT UNDER APPROVED WPO 201800051. NO MODIFICATIONS ,,; I I I ARE PROPOSED TO THIS AREA 1, ITS `� � �— � � /� � ° 1 I I p I I STORMWATER QUANTITY TREATMENT. THE e / / 3 I I \\I II IAvIC1 III \ I • \ WATER QUALITY TREATMENT WILL BE SLIGHTLY �\ \ / I / / \\ III ( °owl II I I Im m I■ IMPACTED WITH THE REMOVAL OF LS-11. oI #1 LIMOS, TYP. „ ; � , G APPROV D POND 4\�-- i CONCENTRATED \ _ =�92 �� �—��`�,®� \�P\ z I II I I I IIII I ■\ I --I V / / /I I I �/ \\ \ OUTFACE TO POI #1 1 ° \ \� ��\ 04 N LU � IIII I IIIII \\\�■ �\ / //III' I \/ �11 I I 1 �� ��II:.:�\\ I III I , i -- o �\ \ ° \ \\ = Q LU 12�\\. MANAGED STEEP \\' OO I ( :: e o :�: \\ \\\ �� v I I I I \ \ � SLOPES, TYP.:: III IIIII I �z l I I \� O \ LU (� Q PRESERVED STEEP/\�\ ^ 7 �>/� �GREENWAY,� \ I \ i ° _ — _ TYP. o �� I \� I \\ � -. _- I \ / / / // ` 1 � I I \ pAa \ \ \ `•'o �\ � \ \ \\ \ \.... (] \\ J` � (pJ Fj) Op / N O � J6P '—� � 1� ,--I LU QUANTITY THIS AREA (BLOCK 8A) RECEIVES STORMWATER /n QUALITY TREATMENT UNDERn \\ \ \ \\ \ \ \ O �C OCC APPROVED WPO D201900004. NO MODIFICATIONS / / ` \ \ O°0o \ ��— / s� s �� ° O ARE PROPOSED TO THIS AREA & ITS 7 / \ \ \ \ \ \ \ — —� L9 —j STORMWATER QUANTITY TREATMENT. THE 1�\� \ �\ A \ I I I I I \ \ �qe \ �\ \V \� �° / // �t 000 WATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL OF LS 11. j / 40� I I I \ �� m_ 00� A / �- \\ i / � I,:,/� � -vim �`� (� � \ \ I II 4-42 THIS AREA (BLOCK 86) RECEIVES 1_ ' -- A \ V \� �— / / /�` STORMWATER QUANTITY AND X �� \ _� / \ � �� / ' /� �� �— —� LU QUALITY TREATMENT UNDER--z: �\ _ _LU z APPROVED WPO ARE PROPOSED NO A �r Oo �� �� MODIFICATIONS ARE PROPOSED / A \����—� / \ —� // \� � TO THIS AREA &ITS TREATMENT. � � \ � �� \ \ � _ � / � � � � � � A� � � vv Qc)� . Ul \ \ A \ / / A � \� '- A\� ��� � �� \ = �� '"n �'i-� � % �� o � � w = O \ —� / �ai�i//�'\�z �� IIII 11 I �■ ��/,o III �� - �� \ ,� 38. 6 H L� u) Z w ''� III 1 II I � v � ■ — �) � I 1 �� I I I I I ' \\ �' •. � I � � � — _ ,, / �� � �� w 1 � � � ��' ` � PRE -DEVELOPMENT SWM NOTES: LU �� �s % 1. APPROVED POND 4 PROVIDES SWM TREATMENT FOR BOTH THE TOWN II �1 1 Ill�� I11 Ily I I I I I I 3 ��fi��e� \J �oLoc puNa� / j / CENTER (CONCEPTUALLY SHOWN ON THE NEXT SHEET) AND THE APPROVED V BLOCK 5 &SALAMANDER STREET SHOWN ON THIS SHEET (WPO 201800050). -- - ��_...� _�j % --� 2. APPROVED 'POND 4' WAS OVER DESIGNED FOR ITS WATERSHED (WHICH p ILL I ( I II II _ I I I ��� y °°° — �' �/� INCLUDES BLOCK 5 & SALAMANDER STREET) SO THAT IT COULD ALLOW FOR O FUTURE DEVELOPMENT TO DRAIN TO IT. THIS PLAN SIMPLY CONFIRMS LLI APPROVED 'POND 4' CAN ADEQUATELY HANDLE THE ADDITIONAL FUTURE TOWN CENTER CONCEPTUALLY SHOWN ON THE NEXT SHEET. LU 3. BECAUSE APPROVED 'POND 4' TREATS THE FUTURE TOWN CENTER BLOCK 5 & MI I �/A I 101-11 ,_--LEVEL SPREADER (LS-11) ORIGINALLY APPROVED UNDER � WPO 201700037 AND REVISED WITH WPO 201800013. \ / \ \ �_/ l6 S W o 1 1 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined within pond) Section C.3.c (Outfalls to mapped Floodplain) 2 2 Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C. (10-yr. Post Flow < Pre Flow) N/A (10-yr. Post Flow < Pre Flow Satisified) SALAMANDER STREET, THERE ARE NO PRE -DEVELOPMENT IMPERVIOUS AREAS DRAINING TO APPROVED 'POND 4' IN THIS PLAN's PRE -DEVELOPMENT ANALYSIS. THE IMPERVIOUS AREAS SHOWN ON THIS SHEET DEPICT THE APPROVED PLANS, BUT ARE CONSERVATIVELY NOT TABULATED IN THE PRE -DEVELOPMENT ANALYSIS OF SUBAREAS A & B. SUBAREAS A & B WERE ANALYZED WITH A 25% WOODS & 75% GRASS LAND COVER TO REFLECT PRE -CONSTRUCTION GROUND COVERS. 4. SUBAREAS A & B WERE USED IN THIS PLAN's CHANNEL & FLOOD PROTECTION ANALYSES FOR THE FUTURE TOWN CENTER, APPROVED BLOCK 5 & APPROVED SALAMANDER STREET. I LU w JOB NO. 182150 I SCALE I 1 =120 SHEET NO. 14 1�1II re� I � � 43 \I I III' ------ THIS PORTION OF STELLA LANE I IS_,,�M TREATED UNDER WPO 201800086. THIS � 1 PLAN IS CURRENTLY UNDER REVIEW AND � NO MODIFICATIONS ARE PROPOSED TO - ITHIS AREA & ITS TREATMENT. v III I I I THIS AREA (BLOCK 4B) RECEIVES STORM WATER J I I \ ■ I QUALITY TREATMENT UNDER APPROVED WPO20 800051. NO MODIFICATIONS I D ARE PROPOSED TO THIS AREA & ITS ■ STORMWATER QUANTITY TREATMENT. THE WATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAIL OF LS \� III I I ' I � \ \ \ � / � �� \ • \ I -- I I 50 � I IIII 0 - hR I r I�\I� x.� 11\\■ III � � IvvIII • I, vv _ _ 1 THIS AREA (BLOCK 4A) RECEIVES STORMWATER I III IIII\ \ QUANTITY AND QUALITY TREATMENT UNDER APPROVED WPO 201800051. NO MODIFICATIONS I I I I II ARE PROPOSED TO THIS AREA & ITS WATER QUALITY TREATMENT WILL BENSLIGHTLY IIII ��I II I I��I Im R II I IMPACTED WITH THE REMOVAL OF LS-11. � I 1■ � IIII 111I II � I ✓ III \ \ '� J III I II �\ III IIII III III I \ _� � •-� � � I � � � i IIITHIS AREA (BLOCK 8A) RECEIVES STORMWATER QUANTITY AND QUALITY TREATMENT UNDER APPROVED WPO 201900004. NO MODIFICATIONS ARE PROPOSED TO THIS AREA &ITS STORMWATER QUANTITY TREATMENT. THE WATER QUALITY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL OF LS-11. 32 9- V� 4_-- \ \\ \ \I I I \ \ 4- 428 �4 oo _ QC) I III v o -� �� �_4 - 092 �■ �� -� � �39 � I \ I I V_A \\ \\� I I ■ \� ��_ III II1\11 � ��_ IllV� w \ IIII �. III h - APPROVED LS-11 (NOT YET I CONSTRUCTED) IS PROPOSED TO BE \ \\\\ I✓ %I II \ REMOVED WITH THIS PLAN. SEE THE I / I o n _ o(i.e. APPROVED POND 4 CONTAINS THE 10 YEAR DESIGN STORM AND ADEQUATELY RELEASES THE o o RUNOFF THROUGH MANMADE PIPES & RIPRAP TO A MAPPED FLOODPLAIN). FLOOD PROTECTION FOR W POI #2 IS MET VIA 9VAC25-870-66, SUBSECTION C.2.b (i.e. WET POND B RELEASES A 10-yr O NOTE: POST -DEVELOPMENT FLOW LESS THAN THE 10-yr PRE -DEVELOPMENT FLOW). 0 THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE W TOWN CENTER, APPROVED BLOCK 5 & APPROVED SALAMANDER FROM A STORMWATER QUANTITY STANDPOINT, THE REMOVAL OF LEVEL SPREADER LS-11 DOES NOT V7 I 1 i � � = STREET= 35.98 acres. THIS AREA COVERS THE REQUIRED HAUL / U U - Q A N II O IMPACT NY OF THE APPROVED WPO PLANS ANALYZING LS 11. CHANNEL AND FLOOD PROTECTIO ROADS, BUT EXCLUDES BLOCKS 8A, 8B & 4A SINCE THESE AREAS F R L -11' AREA HAVE ALWAYS BEEN MET SEPARATE FROM THE LEVEL SPREADER INLU COMPLIANCEO S s S S S O S � RECEIVE WATER QUALITY TREATMENT UNDER SEPARATE U S ARATEVSMP III IIII / � / /, \ \ PLANS. THIS 35.98 ac. LIMITS OF DISTURBANCE BOUNDARY THE APPROVED WPO PLANS. IN ACCORDANCE WITH THE MOST RECENT APPROVED WPO 201900004's I III �� �� o G V DEFINES THE VRRM BOUNDARY FOR WATER QUALITY SHEET C-901, CHANNEL PROTECTION IS MET FOR LS-11's AREA (POI-11) VIA 9VAC25-870-66, SECTION REQUIREMENTS ASSOCIATED WITH THIS PLAN 'Le. THE FUTURE B.3.a (i.e. THE ENERGY BALANCE CALCULATION) AND FLOOD PROTECTION IS MET VIA 9VAC25-870-66, TOWN CENTER, BLOCK 5 & SALAMANDER STREET). SECTIONS C.1 & C.3.c (i.e. RUNOFF IS ADEQUATELY CONVEYED THROUGH THE STORM SEWER NETWORK TO A MAPPED FLOODPLAIN .THEREFORE THERE ARE NO PROPOSED STORMWATER UANTITY \ o \ O Q APPROVED LIMITS OF ) _ oCHANGES, OR ADDITIONAL REQUIREMENTS, ASSOCIATED WITH THE REMOVAL OF LS-11 . DISTURBANCE UNDER WPO POST DEV. = Oo 201700037 AMENDMENT #1 � SUBAREA A / � _ O � I z � \ / � � -_--_ w 17.4 ac. \ \ 0 -- o - F- CN=86 / - I r- o WETLANDS, _ - N N Tc=0.10 hrs. -' - / � ° TYP ':o: ERN \. �. \1 r I I I I I I I I �� STREAM L a I I I II n - I I I I I I hikki•, P 111 III I o\ I I I I 11 � \ - 1 \ � \ �� \� SOUTHERN &WESTERN PERIMETERS I I I I T1,III OF SUBAREAS A & B ARE DEFI;r: \ \ \ O �` \ ` O7 BY APPROVED WPO 201900004. 100' OF OLF w/ A ELEV.=22 I I 1 1 \\\ \\ o \ \ I I I ` 0 145' OF CHANNEL FLOW DOWN �� �i ° THE EMBANKMEN � I -� ` I A-/ \ \ ��' O L9 - - - cyi �z ow % ►\ �\ / /// / i% �� IIII ��-��} z // N�\ 3g0 -- OO PROPERTY 2 i I / I � �� � II I"7 / � - - ®� � \ � � � _� ':.•• � I I � � � � "�- OI #1 LIMITS, TYP•V\\ 38" \ \ o APPROV D POND 4 �00 � � - 392 CONCENTRATED ���\ A �� \\_ �- OUTFACE TO POI #1 �� O �� o A / ® �\ 2 / W I I I \ \ \ I \\\\ \\.. LzLj MANAGED STEEP SLOPES, TYP. p - OO 0 0 •LU :.- PRESERVED STEEP O \ \ l/\ o SLOPES, TYP. \ � O 0O 11 or\\ \� 2 GREENWAY,� TYP. w N LLI° -\ 0 O rl Q:05� 0 00o z g 39 THIS AREA (BLOCK86) RECEIVES 1 \ \ \ o �/ �\\_ = c �� \ / % �� U g STORMWATER QUANTITY AND T QUALITY TREATMENT UNDER ti/ �_ 3g \ APPROVED WPO 201800080. NO \ \ \ �_ �a \ /�- / / / - 9 �g LU z MODIFICATIONS ARE PROPOSED �" - \ \ V _\\ �\ -� �,"_ ��� ��_ ��/ / W TO THIS AREA & ITS TREATMENT. \ / g� /�/ / _\ V 1 oo i \\}\ LLI JOU j I Post -Development Impervious Area Summary :A -��LU Subarea A O =�A A PoLo Roads & Parking Lots 277,975 sf 0 ��°.°> AD % j/= - Buildings 163,225 sf j Q O 6 _ Sidewalks 59,875 sf � �//// � y C /� _ ° � � � �-•�° -� � j � %� � � � 501075 sf O O _ /\/°\ � III Post -Development Impervious Area Summary y Subarea B I WATERSHED SUMMARY FOR SUBAREA A Roads &Parking Lots 140,225 sf U Buildings & Pool Area 69,475 sf � w Area, 1-year Flow, 2-year Flow, 10-year Flow, o w CN Sidewalks 5,975 sf Q _ ac. cfs cfs cfs sf DA A (Pre-Dev.) 60 16.25 2.83 6.07 20.62 215,675 JOB No. DA A (Po st-Dev.) 86 17.04 0.34 2.17 54.09 182150 / �// I �7 �j i Overall Acreage Summary \\ II I I I SWM NARRATIVE ON THIS SHEET FOR ADDITIONAL INFORMATION. w w / --LEVEL SPREADER (LS-11) ORIGINALLY APPROVED UNDER -- -,� - - -' 16 STORMWATER MANAGEMENT NARRATIVE: OVERVIEW: o THIS PROJECT IS PART OF THE BROOKHILL DEVELOPMENT, AND STORMWATER TREATMENT IS _� o \ / I PROVIDED TO MITIGATE THE IMPACTS FROM THE PROJECT'S PROPOSED AND FUTURE IMPROVEMENTS. THE STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM REQUIREMENTS. �1 THIS PLAN MEETS TWO PRIMARY OBJECTIVES. THIS PLAN PROPOSES TO PROVIDE STORMWATER =SC( R• LLINS QUALITY AND QUANTITY TREATMENT FOR THE FUTURE DEVELOPMENT OF THE TOWN CENTER, AS WELL Lie. No. 035791,1,~ AS TO PROPOSE THE REMOVAL OF AN APPROVED LEVEL SPREADER (LS-11) THAT HAS NOT BEEN /38� CONSTRUCTED. AT THE TIME OF LS-11's APPROVAL, THE FINAL LAYOUT OF BROOKHILL WAS UNCERTAIN. HOWEVER NOW THAT IT IS MORE ACCURATELY DEFINED AND THE UPLAND AREAS ARE PREDOMINANTLY TREATED WITH MORE RECENTLY APPROVED SWM FACILITIES, ITS NEED HAS DIMINISHED. ALSO, THE INSTALLATION OF A LEVEL SPREADER THAT RECEIVES BYPASSED RUNOFF oNaL FROM A PERENNIAL STREAM IS NOT IDEAL THIS CONFIGURATION WILL BE DIFFICULT TO INSTALL AND MAPPED FLOODPLAIN, \'� WILL LIKELY RESULT IN CONTINUED MAINTENANCE CHALLENGES WITH FREQUENT WASHOUTS. - _- ° TYP. o �� \\, , � �� _ WATER UALITY SUMMARY �` IT IS ENVISIONED THAT THE FUTURE TOWN CENTER WHICH IS CONCEPTUALLY SHOWN ON THIS PLAN WILL GENERATE A REQUIRED PHOSPHOROUS REMOVAL RATE OF 29.94 Ibs/yr. THIS PHOSPHOROUS PROPOSED CONCENTRATED �� ." - - U) ��- LOADING WILL BE MITIGATED VIA THREE BEST MANAGEMENT PRACTICES. THE APPROVED POND 4 AND OUTFACE #2 TO POI #2 � '� r��� � ����- � � _ \ �___ ��'���\���'":;,. ITS LEVEL SPREADER HAVE BEEN EVALUATED WITH THIS PLAN's CURRENT/CONCEPTUAL TOWN CENTER z oI #2 ��ap �. _ �\ V = �AND HAVE BEEN CONFIRMED TO BE ADEQUATE. THE APPROVED POND 4 AND ITS LEVEL SPREADER z �_ WILL REMOVE 25.70 Ibs/yr OF PHOSPHOROUS. ALSO A NEW LEVEL II 'WET POND B' WILL REMOVE AN g ADDITIONAL 8.53 Ibs/ r OF PHOSPHOROUS. THIS WILL GENERATE A PHOSPHOROUS CREDIT OF 4.29 U IN ADDITION TO THE AFOREMENTIONED FUTURE TOWN CENTER THIS PLAN REQUIRES ADDITIONAL -' 20' OF _ �< \ \ PHOSPHOROUS REMOVAL FROM THE ELIMINATION OF THE LEVEL SPREADER, LS-11. PER THE W 20' OF CHANNEL NEL FLOWDOWNo ` j �' `" APPROVED WPO PLANS ANALYZING LS-11, A PHOSPHOROUS DEFICIT OF 2.21 Ibs/yr. IS GENERATED z 1 THE EMBANKMENT ` - \01\ FROM THE REMOVAL OF LEVEL SPREADER LS-11. (D - I IN TOTAL THIS PLAN MEETS MINIMUM WATER QUALITY REQUIREMENTS WITH A SURPLUS OF 2.08 J LU .- I �_��! Ibs/yr PHOSPHOROUS (4.29-2.21). THIS 2.08 Ibs/yr PHOSPHOROUS CREDIT WILL BE APPLIED TO a - � 8 HERE ITS BLOCK 11 IS LOCATED z LU CD o Z W � LU WATER QUANTITY SUMMARY JI q ° THE PROPOSED IMPACTS ASSOCIATED WITH THE FUTURE TOWN CENTER ARE TREATED THROUGH THE O O Q B ATTENUATION IN WET PONDS. APPROVED 'POND 4' TREATS SUBAREA 'A' AND 'WET POND B' TREATS U) t; 2: SUBAREA 'B'. BOTH SWM FACILITIES HAVE CONCENTRATED OUTFALLS, WHICH ESTABLISHES THE w m PROPOSED EXPANSION OF POINTS OF INTEREST (POI). APPROVED 'POND 4' DRAINS TO POI #1 AND 'WET POND B' DRAINS TO POI _ _ OO ° THE APPROVED LIMITS OF - U7 #2 CHANNEL PROTECTION COMPLIANCE IS MET FOR POI #1 & POI #2 VIA 9VAC25 870 CC, Q -66, o' o DISTURBANCE UNDER WPO SUBSECTION B.3.a (i.e. THE ENERGY BALANCE CALCULATIONS). FLOOD PROTECTION FOR POI #1 IS cn 201700037 AMENDMENT #2 MET VIA 9VAC25-870-66, SUBSECTION C.2.a WITH A LIMITS OF ANALYSIS SET BY SUBSECTION C.3.c LU 1 Pre -Development Post -Development Area, ac. Area, ac. DA A 16.25 17.04 DA B 7.20 6.41 WATERSHED SUMMARY FOR SUBAREA B Area, 1-year Flow, CN ac. cfs DA B (Pre-Dev.) 60 7.20 1.52 DA B (Post-Dev.) 1 90 6.41 0.20 VRRM Post -Development Impervious Area Summary (Boundary defined by this Project's Limits of Disturbance) 2-year Flow, cfs 10-year Flow, cfs Roads & Parking Lots 421,925 sf Buildings & Pool Area 239,350 sf Sidewalks 58,725 sf 3.32 1.04 11.31 11.18 1 720,000 sf I SCALE 1 =120I SHEET NO. 15 STORMWATER MANAGEMENT FACILITY GRADING WET POND CONSTRUCTION NOTES: FACILITY PLANTING SPECIFICATIONS: 1. THE CONTRACTOR SHALL ESTABLISH AND MAINTAIN A VEGETATIVE COVERAGE IN THE POND AND ITS BUFFER. 2. THE CONTRACTOR SHALL ALSO INSTALL THE WETLAND SHELF AND AQUATIC BENCH PLANTINGS, AS REQUIRED, AND USE NUTRIENT RICH SOIL IN THESE AREAS TO PROMOTE HEALTHY GROWTH AND ROOT DEVELOPMENT. 3. PLANT SELECTION SHALL PROMOTE DIVERSE WILDLIFE AND WATERFOWL USE WITHIN THE STORMWATER WETLAND, AQUATIC BENCH AND BUFFERS. 4. WOODY VEGETATION MAY NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET FROM THE PRINCIPAL SPILLWAY STRUCTURE. 5. A VEGETATED BUFFER SHALL BE PROVIDED THAT EXTENDS AT LEAST 25 FEET OUTWARD FROM THE MAXIMUM WATER SURFACE ELEVATION OF THE WET POND. PERMANENT STRUCTURES (E.G., BUILDINGS) SHALL NOT BE CONSTRUCTED WITHIN THE BUFFER AREA. EXISTING TREES SHALL BE PRESERVED IN THE BUFFER AREA DURING CONSTRUCTION IF POSSIBLE. 6. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY. THE DENSITY OF THESE COMPACTED SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB, PLANTING HOLES SHALL BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOT BALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. 7. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. CONTRACTOR REQUIREMENTS: 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 1-800-552-7001 BEFORE ANY EXCAVATION). 6. REFER TO THE APPROVED CONSTRUCTION PLANS FOR ANY DETAILED SITE INFORMATION. 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. 8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK, BUDS, BRANCHES, STEMS, OR OVERALL SHAPE OF THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE BEEN GROWN. 9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 10.ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. 11.PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL. 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE DESIGNER. 13.MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER. 14.NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN. 15.PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOTSTOCK. 16.THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE CALENDAR YEAR. 17.THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS. 18.THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE CONTRACTOR'S CONTROL. FACILITY CONSTRUCTION: 1. THE CONTRACTOR SHALL USE THE WET POND AS AN E&S CONTROL STRUCTURE, IF SHOWN IN THIS MANNER ON THE APPROVED ESC PLANS. IF APPLICABLE, THE WET POND SHALL SERVE AS A SEDIMENT BASIN DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENT VS. WATER QUALITY TREATMENT REQUIREMENT). INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION WET POND IN MIND. THE BOTTOM ELEVATION OF THE WET POND SHALL BE LOWER THAN THE BOTTOM ELEVATION OF THE TEMPORARY SEDIMENT BASIN. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT DISCHARGE OF TURBID WATERS WHEN THE BASIN IS BEING CONVERTED INTO A WET POND. 2. WET PONDS SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE PROPOSED POND SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THE CONTRACTOR SHALL DE -WATER, DREDGE AND RE -GRADE THE SEDIMENT CONTROL FACILITY TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT STAGING AREAS WHEN POSSIBLE. 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE. 5. THE CONTRACTOR SHALL INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE POND THAT ARE GRADED OR DENUDED DURING CONSTRUCTION MUST BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. THE CONTRACTOR SHALL ALSO EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE. 7. THE RISER AND APPLICABLE OUTFLOW STRUCTURES SHALL BE INSTALLED, AND THE CONTRACTOR SHALL ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION. 8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS IN 8-TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS WITH APPROPRIATE EQUIPMENT. THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED IN TABLE 14.4 BELOW: rage 14.4. Clay r joeIr Specrl+carions Property TestMethud Unit S cifcation Permeability ASTM D-2434 CmJsec 1 X 1p Plasticity Index of Clay ASTM D-423M24 % Not less than 15 Liquid Limit of Cla ASTIv1 D-2216 °ti Not less than 30 Clay Particles Passing ASTM D-422 % Not less than 30 Claym Goaction ASTM D-2216 Iyu 95% of standard proctor dens it �3aurce: vir-gin la stormwater Management Handl)ooK (19J9 ) 9. EXCAVATION AND GRADING TO THE APPROPRIATE ELEVATIONS AND DESIRED CONTOURS SHALL BE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE POND. 10.THE EMERGENCY SPILLWAY SHALL BE CONSTRUCTED IN CUT WHERE POSSIBLE, OR IN STRUCTURALLY STABILIZED SOILS. 11.THE OUTLET PIPES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION, SHALL BE INSTALLED. 12.EXPOSED SOILS SHALL BE STABILIZED WITH TEMPORARY SEED MIXTURES APPROPRIATE FOR THE POND BUFFER. ALL AREAS ABOVE THE NORMAL POOL ELEVATION SHALL BE PERMANENTLY STABILIZED BY HYDROSEEDING OR SEEDING OVER STRAW. 13.THE POND BUFFER AREA SHALL BE PLANTED WITH A VEGETATIVE GROUND COVER AND THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS. 14.ALL CONSTRUCTION SHALL ADHERE TO THE VIRGINIA DEQ POST CONSTRUCTION BMP CLEARINGHOUSE REQUIREMENTS SET FORTH IN DESIGN SPECIFICATION NUMBER 14. FACILITY MAINTENANCE: MAINTENANCE OF THE WET POND(S) IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE POND. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE FOREBAY. 1. MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 2. INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 3. 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. 4. INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, ETC. 5. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 6. INSPECT CONDITION OF ALL TRASH RACKS OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES. 7. 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. 8. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY. 9. REPAIR AND REPLACE AS NECESSARY. 10.PLEASE SEE THE TABLE BELOW FOR ADDITIONAL MAINTENANCE MEASURES: Tabl-e 14.6. Typicar Wei Pond Womi-enarlce Tasks and Frequency Maintenance Items Frequency + Mowing - twice a year Quarterly o r aft er major storms + Remove debris and blockages (}1 inch of rainfall) * Repair undercut, eroded. and bare sot areas + Mowing Twice a year + Shoreline cieanupto remove trash. debris and floatahles + Afull maintenance inspection Annually + Open up the riserto access and test the valves + f�epair broken mechanical components; I needed One time -during the + Pond 11Uffer and aquatic 11en-ch reinforcement plantings second earlollolr�i constructrarl + ForebaySediment Removal Every 5 to 7 years + Repair i s. the riser ands it I+n�a , as needed From 5 to 25 years FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN(S) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR, WITH THE ENGINEER AND INSPECTOR, DURING THE FOLLOWING STAGES OF THE WET POND'S CONSTRUCTION PROCESS: 1. PRE -CONSTRUCTION MEETING 2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS) 3. EXCAVATION/GRADING (E.G., INTERIM/FINAL ELEVATIONS) 4. WET POND INSTALLATION (E.G., INTERIM AND FINAL ELEVATIONS) 5. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(S). 6. PLANTING AND VEGETATIVE STABILIZATION PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT) 7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) Elevation (ft) Area of Forebay Cell Contours (sf) Volume (cf) 386 428 0 388 864 1,267 390 1,442 3,548 391 1,785 5,159 392 2,164 7,130 394 - - 396 - - 398 - - Elevation (ft) Area of Main Cell Contours (sf) Volume (cf) 386 5 0 388 523 386 390 1,908 2,673 391 3,013 5,112 392 5,559 9,334 394 - 396 - 398 - VA DEQ STORMWATER DESIGN SPECIFICATION NO. 14 Elevation Area of Wetland Volume (ft) Cell Contours (sf) (cf) 386 - - 388 - - 390 218 0 391 512 355 392 882 1,043 394 - - 396 - - 398 - - Elevation (ft) Total Facility Area Contours (sf) Volume (cf) 386 433 0 388 1,387 1,730 390 3,568 6,516 391 5,310 10,927 392 81605 17,818 394 13,155 39,418 396 18,066 70,509 398 23,607 112,059 VVET POND SECTION 4: rYPIC AI. DETAM +�aEFI SHE].F WETL4�Jd I')_ VM- 2i tWETLANDGELIL f1FLOWFROMFOREMAY QVEFiFL<YW FRAY TVOEF H - 12' FQREELAY MEFER TO TABLE 14.2 FOR VOLLJW (REFEF3TOTA ALE REZIU RIEMENITSI fi�T� 9B►#GFi 14.2FaR1�O rUNE RF{jL_�FlEh1EM9} 00 k * * Ol1TLET PPIr}TEO LIYW FLOW I i V* r - m- SER HFUH FLOW LA NDMCARRIM FBHO AERATiM FLOW F'ATH AND FK04 L 4EOME119Y (FEE FEFi T�TAULE 19.2 PAUAl1C 9 mil L2 RERUIREM NTO E i4.2 FOH LT atJL] FOR L, ANO L Q TSB P1Q1 F=M6NT&,+ 0 FEaY EENCH 6E�`JOH PL�AWMEW NOTE` REFER TO TAMP 14.2AND 00MR71SPEC "0. 13 C0NffrRU :TE VISTLAN6 EieambN 6 FOR Li AND L-_VCCL"E .AND 9TORA4E L7EPrH ORITEMA IN 4LETLAND CELL CWEFIFLCW TO WEI POND NOFMAL F SAFETY 9ENC H O#+AIyIJEL PFiOTEOT1ixJ AC LU ,T� BENCH TV NORM AL POOL -gypp IFOFrffnAY Hfcll,,.�,�. IJlP�PEIASNITT=Illr�r (, „ _0W FLOW TO LIPPER SHELF WEMM UD _ _ _y am TjT���' FIEVERSE_LOFELOW FLOW - - - - -.7-9_ .. PROFILE iWITh UPPER 5MELF W TLAI~ Pf c^AFM 2Eh10H AQUAT9,- BENCH �HANNELFSRbTE�nCN TV f,dPhlAL Fti00L , FCFIERAY -III-III-II _ MA Hlr3H FLM raw`=T IPUM No II I -III = III I I III=III=1 I III=III=III-- PONo is =ill - - - - 41 L�I � - � - - REl?ER2F 13LO�r-+E L104�1 FLOW r 7TE: REFEFt TO 2DECTION 6 FOR L1 AND L21`40 F' L Pt30L VOLUrY1E , AND EEPTH1 AND TV AND -CHANNEL H STORACIE DEMHa PROFILE (WITHOUT UPPER SHELF WETLAND) (Figure 141. FM Yong' Nsfgn 50f onarics t�IPe culvel.t 0 1 wino plated :gook 1• attached wLLh 3 & raekener r e 176 -1;'t1'dip. holes 000 ISO~T71Ct:T']C 3/3" dia hold 7 o single B]dP ufIfLvo 1/4' HDPE pAl,a (optional) HPPF si.r43Ci.li rl=l pl y.SkiC wi i.h 2-1/!i" tines and 1/£" Ohio nzanu=ec-4urod by PLax-ia 3oludiona rne. or equal ehoxn -With DptiQnal plat% a°t H r]PF t4'U CL'J ry,l nlr Yl.iC iriL.7i 2-1,f9" holes and 1/A- plati vCC L10I1 manufactured bar Plastic t DLAjons Lno. or equal PLASTIC P.q. Bns ta�q� DEBRIS CAGE 54LUTI0NS �iYinciieaili r va 22MI INC. $rx-err-r}7x� rrw.plet�ic-eolL.:��eom 100-yr PE, 10-yr PE, 2-yr PE, 1-yr PE, PROPOSED LEVEL II 'WET POND B' DETAIL WET POND'B' DESIGN & REQUIREMENTS: SCALE 1"=30' 14 I I I I l/OUTFA/LL.O TMN JF FUTURPIPE Treatment Volume, Tv (VRRM) 18,130 cf Minimum Treatment Volume Required for Level II Basin 27,195 cf \ Treatment Volume Provided at MWSE 17,818 cf Minimum Percentage of Tv Provided at MWSE 50 % Percentage of TV Provided at MWSE 66 % `,__-----GREENWAY, Ponding Depth Corresponding to Minimum Tv Required 0.9 ft TYP. PRESERVED STEEP SLOPES, TYP. Maximum Ponding Depth allowed for Minimum Tv 4 ft Maximum Percentage of Tv Provided above MWSE 50 % Percentage of Tv Provided above MWSE 34 % Minimum Forebay Volume Required (15% of Tv) 4,079 cf STOR EWER DESIGN �T0 BE PART OF / ` Forebay Volume Provided 7,130 cf TH WN ,CENTER's FINAL ITE PAN. / / / Minimum Upper Wetland Shelf Area (10% of Pond Area) 861 sf 0+00 Upper Wetland Shelf Provided 882 sf / \ PROPOSED 943 4 OF / PROPOSED FLAT VDOT CLASS Al COARSE Oi CL. III RCP z /o AGGREGATE OUTLET PROTECTION w/ / 5" Qa 4. 4° / w/ VDOT STD. EW-i GEOTEXTILE FILTER FABRIC UNDERLAYMENT. FABRIC TO BE KEYED INTO EX. GROUND 9" 3+ 47 MIN. AT ENDS & ALONG PERIMETER. FABRIC / -- -- - / TO OVERLAP A MIN. OF 9" (L=33', W1=4', / W2=15', D=18" MIN.) INTERNAL BERM LOCATED BETWEEN THE FOREBAY AND WETLAND CELL TO HAVE A TOP ELEVATION OF 392.0' WITH A 15' / 2 7 F REBAY WIDE WEIR (CREST ELEV.=391.0'). / S� CELL �\ \ ` SEE TH1� SFTE-ET FOR SCALED \ WEIR TO CONVEY FLOWS FROM i_ PROFIIVtS OF THE ALIGNMENTS (TYP.) FOREBAY CELL TO WETLANDS CELL. �\ PROPOSED ioo' WIDE VDOT CL. Al RIPRAP LINED EMERGENCY SPILLWAY CREST SHORTEST FLOW PATH (132') / �. GF - ELEV.=396.75'. SPILLWAY TO OVERALL LENGTH (138') > o.8 / .O \ % HAVE 4:1 SIDE SLOPES FOR O VEHICULAR TRANSITIONS. I<� A \ O 3F5Pr / \ \ io' WIDE TOP OF II t ft1 ,9 DAM ELEV.=398' FLOW PATH > 3:1 \ �� CO / \, < z (FLOW LENGTH=195' /WIDTH=64') / MAIN \ y W 1+16 INTERNAL BERM LOCATED BETWEEN THE WETLAND CELL & MAIN CELL TO HAVE A TOP F VA ELEVATION OF 392.0' WITH A 15' WIDE WEIR (CREST ELEV.=391.0'). WEIR TO CONVEY ��../ � 12' WIDE ACCESS ROAD TO RISER FOR FLOWS FROM WETLANDS CELL TO MAIN CELL. \ \ 325s TENTIAL MAINTENANCE io' WIDE, 12" DEEP \ F 575s AQUATIC BENCH F EC / PROPOSED VARIABLE WIDTH SWM e \ & ACCESS EASEMENT, TYP. CONTRACTOR SHALL USE' I / 1 NUTRIENT RICH TOPSOIL FOR THE \ AQUATIC BENCH & SHALL ENSURE HEALTHY GROWTH OF PLANTINGS DURING THE FIRST YEAR (TYP.) PROPOSED MWSE=39z V � � 1e -�LOR�S------- PROPOSED VDOT STD. B-i 0 8 REINFORCED CONCRETE MH BASE TO SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A ----�_ PROPOSED z' WIDE PROTECTIVE BARRIER AROUND THE RISER TO BE \� VDOT STD. MH-1 WITHOUTTHE FRAME & COVER INSTALLATION. WITH \ CONSTRUCTED OF GABION BASKETS FILLED WITH STONE. \ \ THE FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. DIVERSION TOP TO EXTEND i' ABOVE THE MWSE. STONE FILLED \ \ RISER TOP TO INCLUDE A TRASHRACK, SEE DETAIL ON THE NEXT GABION BASKETS TO EXTEND BELOW GRADE, TO THE RISER BASE OR SHEET. RISER RIM ELEV.=395.75'• RISER TO INCLUDE (i) ONE 02.33" \ TO A POINT OF ADEQUATE ANCHORING. SEE GENERAL SWM NOTE / LOW -FLOW ORIFICE (INV.=392.00) AND (4) FOUR 06" MID -FLOW # 5 ON THIS SHEET. ORIFICES (INV. 395.00). AQUATIC BENCH (ZONE 1) PLANTING SCHEDULE FOR SWM FACILITY SW BOTANICAL COMMON NAME SZE SWM FACILITY QUANTITY COVERAGE (sf) ZONE 1 PLANTINGS PC PONTEDERIA PECTINATUS POND WEED VA VALISNERIAAMERICANA WILD CELERY EC ELODEA CANADENSIS WATERWEED 415 415 PROPOSED VDOT STD. B-i 04 8" REINFORCED CONCRETE MH BASE TO SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERTTHE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-i WITHOUT THE FRAME & COVER INSTALLATION. WITH THE XISTING FRAME & COVER, THE MH-1's RISER OPENING IS z4" IN DIAMETER. RISER 410 GRADE TOP LOINCLUDE A TRASHRACK, SEE DETAIL ON THE NEXT SHEET. RISER RIM395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). / \ PROPOSED 2' WIDE PROTECTIVE BARRIER AROUND INTERNAL BERM LOCATED BETWEEN THE THE RISER TO BE CONSTRUCTED OF GABION BASKETS WETLAND CELL & MAIN CELL TO HAVE A TOP FILLED WITH STONE. DIVERSION TOP TO EXTEND 1' ELEVATION OF 392'.0' WITH A 15' WIDE WEIR ABOVE THE MWSE. STONE FILLED GABION BASKETS (CREST ELEV.=391/0'). WEIR TO CONVEY FLOWS TO EXTEND BELOW GRADE, TO THE RISER BASE OR TO FROM WETLANDS CELL TO MAIN CELL. A POINT OF ADEQUATE ANCHORING. SEE GENERf'tO5 SWM NOTE #5 ON THI tt 1. INTERNAL BERM LOCATED BETWEEN THE \ / CONTR CTOR HALL INSTALL FOREBAY AND WETLAND CELL TO HAVE A TOP EMBANKMENT IN A 0 DANCE \ wl TH DESIG SHOW ELEVATION OF 392.0' WITH A 15' WIDE WEIR ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS ROOOS D THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. GRADE 400 \� io' WIDE TOP OF DAM EL V.=398.o' 395 \ 395 Z 07 it /G RQPOSE \ a MIAISE= 392 0' 390 390 io'WIDE 12" DEEP \K WSE 397.00 Q Q AQUATI BENCH \K WSE 396.27 m o 1 \K WSE 395.27 . O Q1\ V = 386.0N PROPOSED 94.33'' \K WSE 394.93 OF 0i5" CL. III RCR PERMANENT POOL Qa 4.24% DEPTH=6' (FLOOR 385 PROPOSED 6' DEEP FOREBAY ELEV.=386.o') PROPOSED VDOT (FLOOR ELEV.=386') TO PROVIDE PRETREATMENT UPLAND OF MAIN TO PREVENT FLOAT TION THE RISER BASE \ STD. W- CELL & WETLAND CELL. FOREBAY AND BARREL CONNECTION SHALL BE HELPS FURTHER REDUCE THE RISK FIRMLY EMBEDDED 6" INTO AN OF CLOGGING IN THE LOW -FLOW 8'Lx8'Wx18"D REINFORCED CONCRETE INV= ORIFICE. SEE GENERAL SWM NOTE #5 ON THIS SHEET. FOUNDATION. THE CONC. FOUNDATION 380 382.00 SHALL BE BURIED BELOW GROUND. J J _E_ O � O N r` O 00 N O Lo PROPOSED RIPRAP TO EXTEND TO W W O O r� O in O O O STREAM BANKS, AS SHOWN. N O � O � O C' � � O � CONTRACTOR SHALL NOT DISTURB 0 0 � � � � � � � � � � THE STREAM AND WETLANDS W LL 0+50 1 +00 1 +50 2+00 2+50 3+00 3+50 4+00 WET POND B SECTION GENERAL SWM NOTES: 1. STATE APPROVED TRASH RACKS AND ORIFICES SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE DETAILS ON THIS SHEET & NEXT SHEET, OR EQUIVALENT, FOR INSTALLATION. 2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES MEETING MINIMUM VESCH 3.14 SPECIFICATIONS. 3 CONTRACTOR SHALL HIRE A THIRD PARTY GEOTECHNICAL ENGINEER TO ENSURE THE EMBANKMENTS ARE STRUCTURALLY SOUND. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON THE NEXT SHEET. ALL EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE SAMPLING. 4 THE DOWNSTREAM EMBANKMENT SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM 3:1 SLOPE. 5. STONE DIVERSION TO SLOW THE INFLOW OF WATER TO THE RISER, AND TO PROVIDE FURTHER SEDIMENT FILTRATION. IN ADDITION TO THE LOW -FLOW ORIFICE's TRASHRACK, THE STONE DIVERSION RING SURROUNDING THE RISER PROVIDES A 2ND LAYER OF PROTECTION TO REDUCE THE RISK OF CLOGGING IN THE LOW -FLOW ORIFICE. 6. THE PROPOSED LEVEL II WET POND SHALL INCLUDE AN AERATOR. SEE DETAIL ON THE NEXT SHEET. PROPOSED ioo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL io' � C ELI - PROPOSED FLAT VDOT CLASS COARSE AGGREGATE OUTLET PROTECTION w/ GEOTEXTILE FI FABRIC UNDERLAYMENT. FABR KEYED INTO EX. GROUND 9" MI ENDS & ALONG PERIMETER. FA OVERLAP A MIN. OF 9" (L=33',1 W2=15', D=18" MIN.) PROFILE SCALES 41 0 41 0 WIDE VDOT CL. Al NED EMERGENCY EST ELEV.=396.75. E 4:1 SIDE SLOPES AR TRANSITIONS. �` v /IDE TOP FDAM :V -398 400 400 XISTIN GRADE 100' 395 395 \I _TER CTO BE ROPOSED \L AT GRADE 3RIC TO v1=4', , 0 0 390 J J O r- r- W W pp Cp 0 cp W O I O O rM O 17 Lei 0+50 1 +00 1 +25 WET POND B SPILLWAY �06�� ��� SCOTT R. LLINS Lie. No. 035'791 � 06/25/20 ����Ss10NAL z O 1--� CL = J `u Q - `- Z W m C `_ O 0 Z O to u J C Q c H w `u o � c L u C W C ` F 0 0 W N N ~ t\0 Ln Q N N � N t\O C Z�z N It l< N (ne d') W CN (D N W > V) L Z \J l U uJ W 0 L90 z z w OLLB Q W z w U Q w in V) v) LU >Q ZW � O IIIIIIIIJ w v / J < O fQ V O O N LU J H � LU w O w JOB NO. 182150 SCALE AS SHOWN SHEET NO. 16 0 AIR FLO 3 DIFFUSLO AERATION SYSTEM SPECIFICATIONS PURPOSE: The diffused alr, aeranon manuEacturershall pfovlde an underwater aerati.an system desi�rti~d toaera�re, d*-strati Fy. and dr€ula-re wak-er without dlstu rbing the FUtural Fsu rMurttiirl gs of the IakR a nwirO nFnigrlt_ SCOPE: The diffused al r, aeration pack age shall be capable L#F beintj insLa lied in lakes deeper than 3Ft (I on). PACKAGE_ This aeratEDn package shall iruclude the fallowing equipment: g, Air mom Pre ssar Eabi net enckasura. 70 Ind udt coal pressor(&). cir cu It disconnect, and air flaw balancing valve raalnifold5- To b•e d esig red to operate o n eiahe r: i. 6OHit power, 1 15/2081230 volt. single phase 11. SOHz pawner, 2 2Of240 Vo-lt, singire Phase h_ ALirfOxr�2t1 disc Lliffus�r marlifoGdS c_ Tu61 ng •gyp[ - \- - 1 f �ww,0tler�ine.�arldairily� �Ih�dela.ils CABINET/ENCLOSURE Tu61NG: fAwiJaiblta in T60ft ( Wr Aral 0 1 C m �re� or Total req u ireLd t o Bing far 15y5ttm= mpr s nor Feet i m) Non-waighrted polyvioyl chloridt tubing SPECIFY, 1 i S Vorts ISO Hz ------ feet � rn) Weighted p+elveth VIEne € hlo-ride tubing J}tFFIfSEFk F•1Ah11FLDj: JSrrwI`e or Oerallsrj Tubing lengrths per diffuxtsr man Ifald: Qua ntity Type Single Disc Mani (Dld (5) � (D feet No rneters} Nn n-weighted tube ng bull 171sc Marnlfalcl(~«) T_ � feQt �� rr'li~t�r�) 4V�i�ht#d rul�irl� PJSTON AIR COMPXESSOf#: (far lakes aft (1 m) deep or latg@O The air co-mvressoK-5) shall be. a 1 /2UP fucking p6ton, Ju a I fregutncy, ptrmaml � pli IC + itw (p5Q elgi trio motor with Di Iles I uhriC&1i10n, direct drive (no tarel; nr pLLI leyA), d@Signtd for field service capability. P0lyurezhane rust protection, anod to Inclu$e t-he follovAng motor protectlOrr Chemical overload prlRte{ti n, and Intake air filter. The serviGeabile pares_ piston Cups, r4LAin-Ar 5cmws, cylJnder o-rings, Mead D-rings, vAlve and valve retainers: shlautd IaSt two ytars In c*ntlnucus gyration. Thaws mainle"rrce parts shall bQ replJl.ceable with cDmrnon tools. Please consult ywr legal distribulur if you r-mu ire~ a55i 51 a nt in chap*l ng si a 5, pirc sqf s, Or applical ipn5. A] R COMPRESSOR CABINET ENCL.OSIIR& a. Cab1nea body and corer construction shall b+�t 18- ga uge (0_04-13in _ 122c m) 344 stain less Steel. aftd include EPDlu1 edge -grip Seal b. Cabinet cooling system to cm lst of two f2) aAml exhaust fans arced venued intake louvers on the boktorn -of dhe cahImet to prorida in air excharige rate of 410-490 UM c CorMiprc;or-Intake AR to hi` quIck llangp wirldge typafilter's .d. e-ab4n"emclosure se'aurtd bystalrlless steel Iatchto accpmadate IOCKIng mechanism Air Flo 3 DiffawdAt 5x5Lem 5veaficam�ms I Page 1 of F - 4 ? P/N 03-3242 OR APPROVFD EQUAL jW 401 ior 41 r .. A - -r A ;.• YCa�_• I' k :�. - �� 'L BLit•.• - _ - f- •t ".-,�S',t r - ;. - - L _ _ •�'2 AIR FL I A DIFFUSED ALR-[TON M. No elwrIcal parts in water, safe FDr recreztlonal we_ k 17-seeming energy efficienr and cast effective. 1 tin (35GUMi) dii(s arc COOLLW to ProVidC non a sli(k 5'ulfflcQ and coffer higher eflEk-le-neies thriukighout lif�e}�clL}. Operaring, depths up to 40Ft+ or 12.2rrl+. 2 Year 9riMILIsivc. warl'iIlvy, x, Co replete package jaclades Cnbinet %ti i th c omprecssor{s), filter Doll ' 1 v maniralds; and dJIFUSer inanirolii(s). �► S@rQt •. tested avid Ustted ti-.zth r.rL. & CM-C. cor&uirn Lag to UL standards; and carries a 3rd p�91 V b-S t in a with CF_ S"TEtA Cu.pwn�IL] o`4ac Rsl ul p0f�d in VnklA+npntL h�3-lie I # 1 Z i 1h' I.T*D naa.]?'6p ii9lr2•rr1sP A •r71 1 An 4+r ' �f3 d2 AE3 L22 1 2• # r An �4F3-m76i An•281 rYf3.3Zt AR aES•2a2 t i 6 -4+}A AO J t 31 A F- 4 2, PIN 03-3242 0 U, 9 - --- _, y LYr.I Gtx Nrr YWp a •-r ,fi C�e7R}74rl:Ebrt[I Argk4r1CMulraid Z� PRi3 DtJCT ILLZlSTRATIONS r« dna anion cnm"iim �u..,o ru, operlrro dr17M us to 4arl d 12m L All W,ramimr mth "rdEmma I hn{3° mldr`c 4 dHlsdeemir.faldsNm3irwduap w ONus.r rr mrdld h.o.1i rurmememd d high drnwW pdredrriertPW*K enl MrrruaraacUla.mdwirels For 1l.R1 pnl log or part d." lnadwhm Enr"Ja LL1gMIp_ M LeNltssss it NV-Z a sa-sirrul lw 4tu+o�l� slam. �rw is w1�1lr t npr jlI rid wrro Fl.d yrwk*ip M Ihmmud4nfLrwpeaJtalirWk kprmfrmANwF4err6is u Ifina ldirz2�51i 141r 41.f .Ud h¢ -! L.W.-t od Lrp%%a mrU r}a0r a Ld tie lhmd rtra.r ilr pp OF"h%WLiWiawtrkNrmopIL efikilt N&rQ[hmWd V :tram it22514imspoi'mbgm. YJd rt NhiftIM kiaUN:AW CANIK Jbw ror km e.,pa,,km or rmmAw %3 srner--a. wo rr,adam a br1J ng wt<WrOm O I:m mobo F�f+P i. �rrfrirrlyd, ■pprartW as d Ihmd r"Ih nL and EnC.NodL-mmra.Errap..Aw6pna+s UsasarmyL*iu& atap'YM. Ord Larry Qi imb [adom. Wrykmm mpn111" dwh v w ws. Ntirr anrrb"4.am h limp dw prad.rrf.ii ling jr,d 5 prr4prd.�.irL Fmxwc r spuKu` ia:r6m5 amd C-4DT wm be Aumd pmbx 5 OvraNq.6 raa w arherbimaxotm ZF IFwwx a werAlfr.rofm PFROVED EQUAL AIRIOXY-GE1N DIFFUSER M.%NIFC}LDS: The air}axygertt disr diffusers shall in€ludo, but not be Ilrrllted to. the fallowing materials of CArlsLtdCCAorr:. d, aisc type >I 2in (# 56nnrn� membrane dlffL.Ser5 allow For maxlrnum 1 2iwFM and are reslstalrx to Ozone and IJV b, Membrane malter ial ro b t p rtmiurl4 q L1a11 Ly corroprkL5siort molded EPZhM with a n 0la canteen of less than t 2% r. Diffuse r m embranes should have a wbI nirn a rn o if 10,15 5 s-ilt pe fora<tlons and be at least 70% lhwdroptJitici with tensltn strength at 2000 psi d , Diffuse-t w consist 4f membrane with Integral gasket, I:ha 5e, retaining ring, An f air flaw con1=1 orifice e Membrane shall collapse and s-eal when aeration 5yiretm air is ttLrned oFf f. Seal Inq method of re:#aining devicQ ShalI generate a minirnum of 50 pounds per inch/59 Kq/ern Gf cirEumfere nCE of the Stall ng gasktt 10 p roVide a long term posIlive Seal a nd to prevent al r escape g. alffustr base and retalin ling Fing to be constructed of polvpropylerle with wg;jnic UV stablii3e!rs and a Wnsile sttrength of 5000 psi h . Diffuser to. have one 314i n (2_ Fhcrm) ron n-cal an method Lo manifold i. Each diffuser!s all irLdude a manifold that w1II can nect up to two (2) air -discs; to the al supptV tubin-g j. Marsifol� ba$e Shall fit construemd of high -density polyethylerse plastic and lwicarporate ballast charinel-s foe leve I sinking a'f pads -du ring in:stallati-on WEIGHTED PQLYVINTL QL09I9E T1V 51 NGr- TUbI nq :FhA1I to win5tf 41c" 4f My , rRUIve bvQy11r1E:f, pa"inyl. chloride (PVC) materkal. The PUC tubing sFLall he 112' f 1 effFo with a rnirtiirnuFn wall thickness of 1/4" (.64 Cm). Pressura%rating shalt Zia 225 psi as 70o F 1 D C7. C4A1 lengths shall be 100' (30 m), with a weight per 100' (30 * of 43Ibs (2O kg). Tubkrrg shall be Self-gillki ng, le ad dree, and contai In ca rhon falack far U V p rat-artinn. FI@ASt bilrlsu It ytmr local distrihutor for addlzlonal Inforrilarl6rl. NON -WEIGHTED POLYETHYLENE TUBING: The po"thylene tufting shall be IJ21n flcrn)v ith a minfmLim wall thickness of _136in tl _:5mrn). Pressure ratl nq shall b•e 100 ask at 23 F (22 C). Coil lengths shall be 100' (30 rn), with a Weight per 1QQft (30M)-of 11 Ihs (5 kg)_ Tubing shall eanain 2% carbon hlmk For long mrm UV pratectlem. Please consult yBur Imal dis-Wbutor for additional information, INSERT FITTimilk Insist t fLL lings are used to repatr, adapt, or canrlect with the p-alwethyle ne tubing, Fi-mings mi IaLti l n shall Intl ude lime size cou plings , male adapters, and El bows_ T-ESTIHC: A. Saftty a The aerator system shall be tested and apprwed a5 a unit. 5.eparate cwponent testing not al.lovmd. Unit rnu 5t be terIE d 6V Ell, ETL-C, CE, UL or oth er arer edlied tes ring facd iries. 6. Performance - Um It must Its I.nd�, &hd-w otirki mane t,artl rig prmId13d by GS EL MANUFACTL1REPt The dilTwsed air, aeration system shal I be Air FIo 3 Sy5tern* _-_- as rnanvFackure4 by Otterbint Ear@ho. Inc.,3840 WMN ROAD LkST Emirnavii, PA 1 SO49. U_SA FH. (610) 965-601 E. or approved equal. F-or approved equal status, supplier sh al I provide~ th• Wicalrlg informtlon #o Cho Rrgjq-%t OtOgmr, within I D Oay$ 4f the hid nptrting date, for wrltt�en approval. wAf;l>iANFr.'Tht aeratlw wstcm steal l includ e a trvo +}irar ura.rranty Lhe air c0M pressor, air diffuser and f�• ' 3P Discs per Pad -N Qls c hfa]t}AFnpJ]i2 pdr 5Yi11im A 9 115?4.1' 4 230?2.5 4 SYSTEM g of Diffd$er Cornpressor{s) F�d(s) AF3 -IZ I 2 3 I It 2 1 AF3-131 J tiI 14F3-112 1SF3 122 i4F3I.2411 4 I E 2 2 i 4 _- r, 1 41 16 sea.9j%Q ; 23014.7}60 5 220{i.�}58 B 1 CIF12E1 AF AIF �,22:Z 2 AFjj-j3_j AF3-242 ff3-262 underwalter tubing. F- 4' PIN -0- 242 OR APPROVED FIQUAL - AAr FEG 3 D:ffui ed Xr 5Vscei n Sp e•clrecarlona I rage a of 2: EMBANKMENT NOTES: AFTER AN INVESTIGATION OF THE SITE's SOILS, SITE VISITS, AN ANALYSIS OF THE SURVEYED TOPOGRAPHY AND AN EXAMINATION OF VA DEQAPPENDIX A: EARTHEN EMBANKMENT, THE APPLICANT HAS PROVIDED A COMPREHENSIVE EMBANKMENT DESIGN THAT DOES NOT NEED A GEOTECHNICAL STUDY ATTHIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. A SUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR MEETTHESE REQUIREMENTS AT A MINIMUM. THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN ON IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON COMPACTING SOIL. COMPACTED FILL SHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A MINIMUM OF 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS. SECTION A-P: I4rPIC AL GRAYEICAL DE I _AIL IS � H�e't'1terreaus fi1I f � �' rrlifl Gut off trench-C below suitable rFYdtl°'11�1 Soil Dr rock LT------� TYPICAL HOMOGENEOUS EMBANKMENT �p 1 e Outlet Coarse fir PedgMted WIVGtar QF'otJ� 310M I`bundcSw drain FOUNDATION IRA PIS ddrn Sand, trodr rock drCln of mt k to �klransiW filter CHIMNEY DRAIN lr nsktlot'1 fill ,Rork or graalrel E ki nket drain SLANXET -DRAIN Bock or gravel IFD1n Tron: ition filter TOE D-RAI N F igul-e A -la . Roam-ogeir1 ecrr s Eimb t;irkw ejas tr,r Se epa a Con trots APPROVED TOND 4' DESIGN CHECK: Treatment Volume for Block 5 & Village Center, Tv (VRRM) 43,680 cf Minimum Treatment Volume Required for Level II Basin 65,520 cf Treatment Volume Provided at MWSE 62,816 cf Minimum Percentage of Tv Provided at MWSE 50 % Percentage of Tv Provided at MWSE 96 % Ponding Depth Corresponding to Minimum Tv Required 0.1 ft Maximum Ponding Depth allowed for Minimum TV 4 ft Maximum Percentage of Tv Provided above MWSE 50 % Percentage of Tv Provided above MWSE 4 % Minimum Forebay Volume Required (15% of Tv) 9,828 cf Forebay Volume Provided 11,003 cf STORMWATER MANAGEMENT FACILITY GRADING Elevation (ft) Area of Forebay Cell Contours (sf) Volume (Cf) 358 - - 360 422 0 362 1,155 1,517 364 2,193 4,810 365 3,074 7,431 366 4,095 11,003 368 - - 370 - - 372 - - Elevation (ft) Area of Main Cell Contours (sf) Volume (Cf) 358 3690 0 360 5,293 0 362 7,160 12,406 364 9,290 28,810 365 11,258 39,068 366 14,199 51,768 368 - - 370 - - 372 - - Elevation (ft) Area Contours (sf) Volume (Cf) 358 3690 - 360 5,715 0 362 8,315 13,949 364 11,483 33,662 365 14,332 46,543 366 18,294 62,816 368 29,044 109,742 370 33,823 172,548 372 38,733 245,049 General Construction notes for Stormwater Manaaement Plans 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 2. Pipe and riser joints are to be watertight within stormwater Management facilities. 3. For temporary sediment traps or basins which are to be converted to permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from the erosion control inspector. Stu Ill RaX Tllf ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOM DIMENSIONS IN INCHES PLAN SturmRaxTM' Round Series for Concrete Manhole Part No. DTm A Dim B Dim C Min ID Min OD F r24 17 Y4 14 Yi 28 - 24 30 RS-36 21 Y4 14 h 403+i 36 43 RS 4$ 27 3% 19 54 48 57 RS-60 27 18Y. 66% 60 70 Plastic Solutions, Inca CUSTWER PO Box 4386, 1VLndxstfs, VA 2.2b04 M McChee Rd, W ndwrs&r, VA 72M tt37P187T-5727 phmw PROJECT- (5401 722-2219 fwx httpcffvrv.'w.plast7c-solutlan,eom c WET POND 4 MODIFICATIONS: �\ �%� \�� APPROVED 'WET POND 4' PLAN 1. THIS PLAN ONLY PROPOSES ONE CHANGE TO THE X \ SCALE 1"=30' APPROVED 'WET POND 4'. THIS PLAN PROPOSES TO /D RIPRAP LINED \\ \ 1 I PERMANENTLY PLUG (WATERTIGHT) THE TWO APPROVED APPROVEz\ 1 SWIM ORIFICES, AND REPLACE THEM WITH TWO NEW SWIMCHANNEL PROTECTION ORIFICES (NEW 03" LOW -FLOW ORIFICE INV.=366.00 & SIX (6) NEW 08" MID -FLOW ORIFICE INV.=369.25'). 2. THE PROPOSED CHANGE DESCRIBED ABOVE SHALL GENERATE MINIMAL EARTH DISTURBANCES. \ 3. ALL OTHER REMAINING 'WET POND 4' APPROVED DESIGNS AppROVED FORE/ B'4Y \ \ SHALL REMAIN. THIS PLAN SIMPLY SHOWS THE \ \ \ BO OM ELEV.=360.0' ADEQUACIES OF THE APPROVED 'WET POND 4' WITH THE FUTURE TOWN CENTER & BLOCK 5. SEE ORIGINAL WPO / \ APPROVED PLAN FOR DETAILS (WPO 201700037). 4. AN ASBUILT SURVEY OF'WET POND 4' IS REQUIRED / / I I FOREBAY \ \ BEFORE THE FULL RELEASE OF THE SWIM BOND / �� CELL �� � APPROVED �ABIOfG 6 BASKET, STABILIZED / OVERFLOW SPILLWAY; CREST ELEV.=367.0' 10 YR /PE/YK WSE 370.9 \ -! / / 10 YR PEAK � SFZ370.46 /2-Y PEAK /WS =3 9. 6/ 1-Y� PEA W E- 6917 � ii �// I I I I I MAIN CELL i RA NAGE EI SE E T APPROVED / EN OM ASSING WE POND MWSE=366.00 / PER WP 21177031. 1 � MANAGED STEEP I 7 I 2' / SLOPES, TYP. AP ROVED POND BOTTO E EV.=358.0' i I PP OV D 1 IDE $AFETY BENCH / J RANGING IN ELEVATION BETWEEN 3 6' & 366.20' PER WP 20� 700037 I, I, 1 \ APPROVED iz' WIDE TOP APF?ROVED 10' WIDE AQUATIC BENCH OF DAM ELEV.=37z.o' RANGING IN ELEVATION BETWEEN 3�4.5' & 366' PER WPO 01700037. IAPPi20VED 3 'WIDE J / 3S % l RIPRAP LINED EMERGENCY / SPILLWAY CREST ELEV.=/ \ / \ APPROVED iz' WIDE , 370.20 (WPO 21700037). \ \ \ / ACCESS ROAD TO POND 4 FOR POTENTIAL APPROVED'STM X 02' DRAINAGE MAINTENANCE ' STRUCTURE (RIM=372.20, INV IN=362.80, INV. OUT=362.70(LOW-FLOW), INV. / APPROVED 'STM X-01' (POND 4 072" RISER) OUT=363.60 (PRIMARY FLOW, 60"). STRUCTURE TO SPLIT FLOW TO PROVIDE ww � INV OUT=363.30 (060" RCP) ADDITIONAL DOWNSTREAM WATER / / 06" E(D ' r QUALITY TREATMENT. SEE WPO v h (TO BE REPLACED WITH NEW 03 ORIFICE, INV.=366.00) 201700037 FOR DETAILS. j .' j 09" MID FLOW ORr 6E INV. - 36�s (TO BE REPLACED WITH (6) SIX NEW 08" MID -FLOW ORIFICES, INV.=369.25) 7 o I A PROVED LOW -FLOW PIPE o 0 � (8 56' a01 5%) DIRECTING A GREENWAY - 1 �STREA TYP. APPROVED 69.11' OF 060" RCP \ AT 1.59% WITH CONCRETE \ CRADLE TO SERVE AS WET POND \\ 4's BARREL 201700037 WPO . ' ( ) HARE 9MUC7Uwu PL SnC 13Y PLASTIC IHC_ APPROVED VDOT STD. ES-1 UNDER WPO 201700037. 4UMTER SECnOH REMOVABLE FORAOCESS SOMETRI CONCRETE STRUCTURE DIMIFENSION$ INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTIO145 CROSS IS RAC ING FOR OVERHANG Ha PE ANTI -VORTEX PLATE DATA DRMN r- AMa err: DEMIL P RTION OF THE RUNOFF TO / TYP. PPROVED LEVELSPREADER PER WPO 201700037. r APPROVED 30' LONG CLASS I / RIP -RAP OUTLET PROTECTION UNDER WPO 201700037. 1 �� r f•-L COUNTY OF ALBEXIARLE I)epartrnent of Corninunity D-eve lopment APPROVED LEVEL SPREADER, PER WPO 201700037. CONSERVATION EASEMENT PER WPO 201700037. Construction record Draw wigs As -built) for VSMP The following is a list of infornnation required on construction record drawings for stormwater facilities (reference W ater Protection Ordinance 17-422). It is preferable heat the construction record drawing be prepared by someone ogler than the designer. Please do not provide design drawings as construction record drawings. A. A signed and dated professional seal of the preparing engineer or surveyor. B. The riatue and address of the firm and individua] pre pari ng the drawings on #Ize title sleet. IC. The constructed loco#ion of all items associated with each facility, and the inspection records to verify proper dimensions, materials and installation. The items include, but are not limited to the following: 1. Inspection Records and photographs for pipe trendies and bedding, including underdrains. . Vidco Pipe Inspection for any pipes 'Which are not aocessi ble or viewable. . Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area neaps for the drainage area treated, and for drainage to the facilities. 5. Current physical and topographic survey for all earthen structures. Ponds should include a survey ofthe pond bottom. Survey& should verify pond volumes are per design. Corrections niay be required for alterations from the design. 6, Pl;lnts, location and type. 7. Plans and 1lrofiles for all culverts, Pipes, Riser&, Weirs and Drainage Structures - Display the installed type of drainage structures, cuIvert/pipe size, weirs, materials, inlets or end treat inerrt(s), inlet and outlet prolection, alignment and invert elevations cornered to design. 9. Comptltations; For significant deyiations from design, provide sea]ed computations verifying that the as -built condition is equivalent or better than design. 9. Ditch Lines- Display the constructed location of a]1 ditch lines and channels, including t_ypical sections and linings. 10. EnSenlenIS - Show a]1 platted easements with dead book references labeled. Facilities and drainage must be within platted easements. Provide copies of recorded documents. 11. Ouardrail, fences or other safety provisions - Display the constructed location of all safety provisions; fences, guardrail, including the type, length and applied -end tmatmentsr compared #o design. 12. Material Iayers- b iofil te r med ia, stone lagers, sand lagers, keyw ays and cores must be verified as ttr material types and depths. Include inspection reports, boring or test pit reports and materials ccr'tifieations. Biofilter media must be an approved mate mix. 13. Access roads; - &how location of access roads, surface Irealment, drainage, etc, as appticable, 14. Compaction reports are required to verify fill compaction in darns. 15. Manufacturers certifications for proprietary BMP* s certifying proper instal tat ion and functioning. ;TR oht',' SCO. LLINS Lie. No. 035'791 U � 0 16/25/20 �SSIONAL EGOS z o J F__ a Z U Z) w co in Ln O z J o Q z w� H W 0 0 LU N N ~ � Ln Q N N � N � Li UU W J J 0 U rn rn N I CD N N \Q LLJ J_ LU I- 0 Q 2 U I Uj I' D U) LLJ LLI U) Lij ly- !Q V 0 N T� J_ LLJ z LL] LL] l� Q z Q Uj >Q tY 0 Ln LU J W '-' w a � JOB NO. 182150 SCALE AS SHOWN SHEET NO. 17 PROP71\ISERVATI EASEME 10 5 2.5 0 10 LEVEL SPREADER DETAIL (LS-11) (WITH BUBBLED REVISIONS) APPROVED LEVEL SPREADER & 15" BYPASS /SPLITTER FLOW PIPE SHALL NOT BE CONSTRUCTED PER THIS PLAN. THIS ELBOW AS PLAN REMOVES THE INSTALLATION OF THESE STRUCTURES. PROP. EW.1 - - z QL" TW 351.55 r BW 351.55 o l TW 352.00 BW 350.10 G 349.98 Aso 349.68� 'yD STM O A01.1� APPROVED 'STM A01.1' ' (TO BE MODIFIED) RIM=358.00 (TO REMAIN) c 048" INV. IN=350.33 (TO REMAIN) � TW 354.00 � BW350.60 015 INV. OUT=350.23 (TO BE REMOVED — OR SEALED WATERTIGHT) sTM 048" INV. OUT=351.23(NEW INV.=350.23)� T J '`-PROP. EW-A TW 351.00 t QQ BW 351.00 1 W 1� �SWIM FACILITY EASEMENT ROP. 6.5 LF G 349.89 PROP. 20 LF ASS Al RIP RAP CLASS Al RIP RAP G 350.30 G 350.26 / / P V-PCH 3349.68 PROP. LEVEL SPREADER \ ROP. 8" SPREADER LIP \ PROP. 3' STONE LAYER G 350.26 G 350.20 lw PROP. CONSERVATION EASEMENT 10 ��0, SCOTLINS Lie. No. 035791,1�, 06/25/20 ���� ����Ss10NAL E��� z O J d Z w Z) 0 U) O z Q O -, z w W w 0 0 w N N ~ t.0 � N t0 AL9 1 M Cz N cy) 0 cy) W 04 N (D W i V) J LLI V) Q J �+ J < Lu > 0 U F-- ® Lu z 0 Lu Lu '—' i 0z = O z U I --I Q W� lln� Lu u Lu w ul U � Q J � ZLu J 0 � Jw 0 O J O Q 0 N w J L0 Lu W D_ U") JOB NO. 182150 SCALE AS SHOWN SHEET NO 18 B ookhill Stormwater Quality Summary Table TH 0 o� SCOTT R. LLINS � Lic. No. 035'791,� 06/25/20 EISG��� w O z o~c w w Zw O H H W z a z O_ � Q _ z U U J 2:m Ce w 0 w oC w ~ 0 N N N 0 N N t0 I ti C� N � ' O uj ~� � LL W m U �L U -.1� w _ Q = ' z O U J w C� G o J J J Q N o m 0 U w r O � a w J ~ w w _ Ln JOB NO. 182150 SCALE NONE SHEET NO. 19 Phosphorus emoval Amount of Offsite Amount of Offsite ercent of Total Phosphorus Removal Amount of Offsite Percent of Total