Loading...
HomeMy WebLinkAboutWPO201700037 Plan - VSMP 2020-08-08GENERAL NOTES OWNERS: TMP 04600-00-00-019B3 CROCKETT CORPORATION 435 PARK STREET CHARLOTTESVILLE, VA 22902 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. Soli, PG. 270 39.98 ACRES ZONING: NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT (ZMA2o280002i WITH PROFFERS -APPROVED BY THE BOARD OF SUPERVISORS ON JULY 27,2019) -THE CODE OF DEVELOPMENT AND APPLICATION PLAN FROM ZMA201500007 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 (SP2015-00025) WAS APPROVED TO ALLOW THE GRADING ACTIVITIES IN THE FLOOD HAZARD OVERLAY DISTRICT (FH). THE SP WAS APPROVED ON NOVEMBER 9, 2o26 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: 52 UNITS (MINIMUM) To 154 UNITS (MAXIMUM) - 2 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 2025. BOUNDARY INFORMATION WAS COMPILED BY LINCOLN SURVEYING ON MARCH 7, 2015. FIELD VERIFIED BY COLLINS ENGINEERING, MAY 2020. DATUM: NAVD 1988 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 ioo-YR FLOODPLAIN LOCATED IN THE BROOKHILL DEVELOPMENT PER FEMA MAP ID 52003Co28oD, 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 2oi600004. 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 'YfCI ITY AP: BROOKHILLCI:SCOTT f OF��I R. LINS . 035791,SECTION 1 MASS GRADINGOO 04/20�1 VSMP PLAN AMENDMENT #2 (WP0201700037) RIVANNA MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA EXHIBIT OF CURRENT APPROVED INFORMATION SCALE 1"=100' POLO GROUN� 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 & SEDIMENT CONTROL PLAN 9 PHASE IIA EROSION & SEDIMENT CONTROL PLAN 9A PHASE IIIA EROSION & SEDIMENT CONTROL PLAN 913 PHASE IIIA (ALTERNATE) EROSION & SEDIMENT CONTROL PLAN io 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 3.5 POST DEVELOPMENT STORMWATER MANAGEMENT PLAN 16 STORMWATER MANAGEMENT DETAILS 17 STORMWATER MANAGEMENT DETAILS 18 STORMWATER MANAGEMENT DETAILS 19 OVERALL BROOKHILL STORMWATER QUALITY COMPLIANCE TABLE 21 TOTAL SHEETS EROSION CONTROL * EROSION TROL HANDBOOKSPECIRCA77ON NUMBER CE UJUM C0NS7RUC77ON ENTRANCE 3.02 CR CR ST SB OP RR CD ' TS TS PS PS TP DC DC CONSTRUCTI0N ROAD 3.03 STABILIZATION SILT FENCE 3.05 SEDIMENT TRAP 3.13 SEDIMENT BASIN 3.14 C�1/i/��r�:bi/XN/CO���ii[•7 RIPRAP 3.19 CHECK DAM 3.20 TEMPORARY SEEDING 3.31 PERMANENT SEEDING 3.32 DUST CONTROL 3.39 APPROVED by theAlbemarleCounty Commu018y/ 07e/ 2 02 p Department Date Flla WP0201700037-amendment 2 APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIADEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT z 0 zoo O z J [) rvQi > z w F�1 W ce z z w 0 z 0 U O N M n LU w a z g a 0 w v7 w 0 0 0 LU N N N akD M v o kD co N lD co LU Z W W Ul z Cy) ti M co N M i N C:) Cn N N LLI J J LU F_ 0 U LU F LU LU LLJ C:) O N z P-1 0 V V r) V z 0 U rW V J i 0 0 w co LU O U w o w c 0- to JOB NO. 182150 SCALE AS SHOWN SHEET NO. 1 ;—�—�--'�— \I 1 \ V A \ GENERAL NOTES: L 1. NO FLOODPLAIN EXISTS ON THE SUBJECT SITE PER FEMA FLOODPLAIN MAPS # 51003CO280D. / / ✓ i' I I� � _ — � � / � — �� � / � J \ \� \ \ � \ \ �\ � �' \ � \ 1\ \\ IIII l 1 �\I / O EXISTING SANITARY SEWER AND I III I I \ 1 IIIII 2. BEFORE BEGINNING SITE WORK, THE CONTRACTOR SHALL �� rl T 1. ! �I — � ' — � ' — � / / �' � -- / I I \ \ \ `(:'.:•. ) \ \ \ � � \ 11 I I I I I I / � 1 � �! - % - - - - BLOCK g / / / - / / - `I"" \ \\ _ -2o SANITARY SEWER EASEMENT I I \ \ \ \ INVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF / % / SCOTT/R. CITLLINS Z - - - - - ' / /' - i - - /c ✓ \ /"� \ \ \\ \ \1 = \ \ _ - \ \ \ I I I I I I I \ \ \ \ \ UNDERGROUND UTILITIES, MECHANICAL AND ELECTRICAL SYSTEMS, T/ L) Lie. No. 0357911n AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE ✓j _; - \ - - - - - - / - / / \ \ / \ \ \ \\ \ \ \ \ \ - \ \ J I III I I \\ I ® \ CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION duo 06/25/20 k4� - r y \ - \ \ \\ \ \ \ . / I \ — 1 i / J %� i� _ \ \ \ \ \' \ \ I) AND INVERT ELEVATIONS AT POINTS OF CONNECTION OF SANITARY /i--l/ / _ / /v—/ — V A� v v v / A v / / i v V �� '� V A VA A - v - v V / \V 1 SEWER STORM SEWER AND WATER SERVICE PIPING 1L ✓ /� \ \ ALBEMARLE COUNTY / ' / / �/ - - \ \ BLOCK ii \ \ \\ \ \ \ \ \ \ \ / / \ I I \ \\ \ \ � /// / UNDERGROUND ELECTRICAL SERVICES, AND OTHER UTILITIES. THE MANAGED STEEP SLOPES \'dal\ �\ - \ - - / / / J) l\ 1 \ \ \ \ �' \ \\ I I / / \ / \ \ \ - / - \ \ \ \ _ I \ \ \\ \ r :� \� \ ` - - - - / / J l\1 1111 I1 \� \ \ CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED - / \ // - \ \ \ \ TO PROJECT THAT MUST BE PERFORMED BY PUBLIC UTILITIES ✓ / / SERVING THE PROJECT SITE. /l� l/ 11 \ ^\- / i - \ \ \ - \ 3. CONTRACTOR SHALL VERIFY SIZE, TYPE & LOCATION OF EXISTING / / —/ \ — // — \ —_i \ \�\ \ \ / / \ // ��11II N \ \\ --///////\\=u� \ \ \ X / \�1 \ �`. UTILITY LINES ON THE SITE. / / r \\ \ - \ \ y \ \ \\ \ 4. THIS PROJECT INCLUDES A PROPOSED GREENWAY. ✓ j j /// IIII _IIIII IIII \ — —_ i - - ALBEMARLE COUNTY / / I / v - - - - - i f - - - - v A -PRESERVED STEEP SLOPES- / V A A LIMITS OF SUNNY �� �I III �� — — — V - - - DAY DAM BREACH) II ��=� / \\ 1 — — _ \\ \\ \ \✓ J 1. a:: \ / i / / /i �// / LL II IIIII vv — ��/'�j l / // o f / / / / / s. / �/�!// / �/ a F f ✓/i/�//�$#,�'/11/// //// V1CC _-)PROPOSED/ /// j� // %l r Z w GREENWAY,TYP. �� 7 / /// / / ®1 I / 6 / / / \�,. �, /® l /// O .a. � IIII 1�Q1(\\\ \�\\\\ \\ / \.\ \\� \� \ I1 /. f ( / // / / IIII \ \ / w '`7� < '�` \ \\\ \\__ — — / / \ \ \\S`� \\\\ \ \\ \ \ / — — r \ — _ / - \ i— / \ III \\ _ r EXISTING LIMITS ---y/1/\\�\\`-_- \ \' IIII\II\I\\ir/ ///I I I IIIIIII l \\\ \ 1 Ii �••� i J,) \�- _ \ \\\\ \ \\ \\` \ OFTREELINE _ \ \C \ \ �/ / I 1 I 1 I / / \\ \ _ / \ \ �- �\ \ \\ \ — _ —_' / = \ \ \ / — . I I I / III I \a.^ -\ _--_ -_/= — _ \ \\� /-LIMITS OF EMAAPPKOVED-' 1 II I / / / / I I \ \ 11 \ \ I _ _ oo YR FLOODPLN l\\ \ \ \ 1 W /\ \ tlt 11 !III // v vvvAvv /v A \ I 11 / I I lIR t A v III sDPzo-e000-4 / lIA A \ V A A V Al f IS INGSTREAM- APPRoveDos�zs�zo�a TBOUNDARY(TYP. SDP202800050 AN APPROVED iz/27hoa8—��---- ��\ - v WPFINAL SITE PLBLOCK 0201800051 A PROJECT BOUNDARY (TYP.) VSMP PLAN — \ \ _ ��\ \ I \ \ _APPROVED oB/oalaoi9 v� \ \ i I \ / I 1 i- i --� ——�.•., v A V A ��� _ v�� —� �A — v v v v VA \ IIII 11 IIII II A _ �V V A \ 0 0 � \ � V AV A \V 1 I III V �A \ \� � �'\ "' C C VA I I I I I � \ I I I — // ��/ Vv, vv v�`��V \ v: \ j � A 1• � I I \vAv A � \ v . �� J i EXISTING DIVERSION /// / � � / ✓ - -- \ � \ \ \ \ \ \ � \ � \� \\\- � � I AREA OF NEW IS I PROPOSED WITH THIS � 1 �—_ �•v v �°' � III I � I I \ / /i\ \ i� � \ I I / � \ � � \� � � I BLOCK i I I I A E D TMP: 0 600-oo-oo-o28Bo OWNER: HORNE LAND CORPORATION01 \III I \ 1 )/ L - I / ACREAGE: 46.43ACII Iz zo °I ��)• y� IIIIII� I III+II/IIIIIII l l /ii'/i// i / _i/j'�i�//j///// MZONING: RURAL Q� 4IIIdI DB/PG: 624/191 - EXISTING c� :' g —vvA\ / ✓ //��� _ _ — — v I ( 1 �l/ / �I III / III _ d / N — / I I —' TRAP v i// — v o /�I / _ — I PROPOSED ROAD I II-_� I I I l l —�_ — I W (APPROVED UNDER SDP2oi80005o) =_—___�`� ;.-• v :. v Avj_—Il� _ ;,,�_ ' �I '��I�1II/VIVI /\ \\VIIIIv�A�vv\vvv�\�v�vvv AV�I 0 P IIIIIII I b - - EXISTING DIVERSION \ � I � I�I /I I�IAAVA\ \vvvvvvAVA Vv� \A�� \ a — Q— p \ III Ill I I I I I I AREA OF EXISTING II IIII�IIIIIIII // // I/1 I ° ��� I I I V I I / JI 1Vv v v vvv vv�,��� � 4a4 — DISTURBANCE � IIIl �aII \ \\ VA1 ---- I �� APPROVED WITH I � �lllllIll�lI �l cWP0201700037 EXISTING DIVERSION aAMENDMENT 41 - v I I Q -- / III v,/i I II /� / �;;_ �i // / �� i II II III II ( \ _ k /// / \ v II I1\ V A \' l / �/ A / / W V / �/ / I 1 VA v \\ �' I / __'IIII / �l / -- /' / v` / I \ \ vAV A v� �' '/V v \ V A III / I IIIII I / f o / A v � �-_ �-- 1��'IIII / f- / V vvvvvvA v A �,.,'� A\VAAA\\ Z I�Id \°8-vV\ V- V A II IIIIII IIIIIIIIIIIII IIIII III y�I IlI / I � _// / � I�— —_ IIIIIIII I v ��v 1�—� -\-F�� v I /� C /vi v�v��— -_ A v v A® v ® ®\ ® I \ v \ A / / / L,1A11�1 i' A,1•� VA V\AV v�V 1\IVV v vV 1 vVAv A�vVA \v WR AO NE I Iif DISTURBANCE/ I I I it PROPOSED -COUNTY �iZ----�i a- o EXISTINGGRAVEL ALBEMARLu MANAGED STEEP SLOPE0 oWITH AccesswAY ENT # �/� o U \) \\ \ \ \ \toj BLOCK 3 Ivv\ \/lI/IllIllll I II11 IIIIII �A � 2 � IIII\I \II II III, ICI I lE RINK Z na 1 I ICI I I �I I / I �`;&PARKING .�I I I v �l/lI lull/l/�l/ll�j �l�l ��� I I LV� �. �V AAv�v v vvv�v�vv � H \ �n� r l vv v / l �llll�l l 111 // lll Av V��vvv vv v\ IIIIIIIV III IIII I n III i - _ I / v v v III vv 1 I Vvvvv�vv (n III II I I �A - / I A /1011\ v v vv X I / / I ; A \VA IIIIIIIIIIIII//�//A \�\�\ v AEI v vv W o : L > 42 \ / // / f \ �IIIIII �1111\I POND 41 # ` �'1 11 ( \�_ v A�\ VA \� \ V AW C IIIIIII \\\III1111111 III �I'II ;I II I� �` -- _ _ _ ,I // L J 1. A �I/J��IIIIIIIIIIII1111�1VI11 VII\ \\IVAV�\11 11 IIII I A�Vvvv..�\ \,Awvvvv\\\\v � IIIII II111IIII II �1 — _ /�//�I I11 \ VA Ul � c� \\ \ \\ \ \ \ \ III /III I I 1 �7 _L W Z / j /� l 'PROJECT BOUNDARY z �II II/l/1 I/llll I�II I ��I�1 �1 � // / / II I' / / ✓ // III '� / I � �/ I v' \ /� / / I � / / / t � v v V r '� //�//////�—_-- II II / I I I \ V I I �` � v vv V) o C) / 11 11/ I 1 /'®� /:✓ \ > IIIIIII , III IIIIIII I I �l,l � VA�v v � �/ � ,',� _ I A v IIII � �� I � �� ���. I J W I I III V / l� / _/ A' \ I ���� � --• r � � --- / \ A III III IIII � I \iAv vv �, / / / / / / // /�' a2 \//I\ IIII (I I I A /' I I I I / v vAvvvv I �VA \ p / I I II v \ V vvv O x IIIII/�� i \�A\\� III A \ �A / / // / / / / / /ll ✓I / // / i///// /// vll I A A \ vv vvv v vv� �� � �v ��\VA \,\ w 0 1 I III 1 A / / �i / / / A I I I I II ' / / / / / , / ✓/ //j/ � I V � V 1 � I � /v o w I I \ 1 ' / / �//� III A I I I I V � v v v v v v V A V�\ // v I �. �.•_ :.:.:�.�. \ `Ili ii I\\\ Boa No. \\\ 11, 1 \ \ , , , i// / , / �' III I \ \ \ \ \ \\\ \ \� \\ -' �,\\111\ \ III II \ / / /// / / / a: \ / �/ l 1 \r\ / / \ \ \ \� \, \\ \ \\ \\\ \�\\�\\\�\ \ \ \ \ / I I \ — \ \ \ \\\ \ \� \\ 182150 \\ \V C L v — v V v v v v vv vvvv v \ vv \ A 0 'C \ SCALE VAVAVA\VAAV>�AVA o \ o d of \ _•� \ ao / \ \� \ \ \\\ \\\ \ ---- // \ \ \ \ \ \\�\ \ \\ \\\\ \ \ \ \ N I � / / / / v vA v v A v v \\ \vv v = 8 � \ \\ \\ \ \ \ �- - �- � � \ \ \ \ \ \ \ \ \\ \ \\\ \ \\\ \\I � � \\ 1 1 1 \ I III � � , � � � \\\\ �� � :�-- � SHEET No. n IN F am \A / // / vv v v v v v v 1 1 1 V AVA` VAV \\VA� \�, \ V v\ v I inclx _ ibo Itt. / / — \ \ I 1 F\ � \ \ \\° 2 EROSION & SEDIMENT CONTROL MEASURES: S7RUCTURAL EROSION AND SEDIMENT CONTROL PRAC7CES SHALL BE IN ACCORDANCE W1774 THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. 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 P07EN77AL ACCESS BY THE PUBLIC. 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. 3.03 CONSTRUCTION ROAD STABILIZATION: THE TEMPORARY STABILIZA7ON OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND 0774ER SITE VEHICLE 7RANSPORTA7ION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONS7RUC77ON 7RAFFIC DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF INITIAL GRADING AND FINAL STABILIZA7ON. USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION TRAFFIC. 305 SILT FENCE.' A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERA7IONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING 774E 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 Wl774 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). 3.07 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 STABILIZA7ON OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 309 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 7RAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON S17E 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, EAR774EN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONS7RUC77ON 7RAFFIC K177-IIN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND OTHER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR TRAFFIC. A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG 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 CONS7RUCTED EITHER INDEPENDENTLY OR IN CONJUNC77ON WITH A TEMPORARY DIVERSION DIKE. 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 774AN 774REE ACRES 774ERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR 774E CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. S7RUCTURALLY LINED APRONS OR 07HER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PR07ECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNS7REAM 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 774E VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE P07EN77AL 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 S7REAM CROSSING. A S7RA TEGY FOR CROSSING SMALL WATERWAYS WHEN IN -STREAM UTILITY CONSTRUCTION IS INVOLVED. TO HELP PR07ECT 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. 3.31 TEMPORARY SEEDING: THE ESTABLISHMENT OF A TEMPORARY VEGETA77W 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 774AN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PR07ECT0N TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR 07HER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 332 PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER 774AT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONS7RUCTON ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. 3.36 SOIL STABILIZATION BLANKETS AND MATTING: THE INSTALLATION OF A PROTECTIVE COVERING (BLANKET) OR A SOIL STABILIZATION MAT ON A PREPARED PLANING AREA OF A STEEP SLOPE, CHANNEL, OR SHORELINE. 3.38 7REE PRESERVATION AND PROTECTION: PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR 0774ER INJURY DURING LAND DISTURBING AND CONS77?UCTON ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CON7ROL, WATERSHED PROTECTION, LANDSCAPE BEAU77FICA 770N, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES 3.39 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 HEAL 7H HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CON7ROL 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 SA 8 moo- SAFETY FENCE * 3.01 000NSTRUCTION ENTRANCE 3.02 CRS CONSTRUCTION ROAD STABILIZATION 3.03 SF S X -X-X- SILT FENCE 3.05 a INLET PR07EC77ON 3.07 8CULVERT INLET PROTECTION 3.08 DD -01-- TEMPORARY DIVERSION DIKE 309 -0-00- TEMPORARY RIGHT-OF-WAY 3.11 0 = DIVERSION TEMPORARY SEDIMENT TRAP 3.13 SB O SEDIMENT BASIN 3.14 OP Pf I PIPE OUTLET PROTECTION 3.18 CD CHECK CHECK DAM 3.20 CDTS TS --&PS TEMPORARY SEEDING 331 S ___& PS PERMANENT SEEDING 3.32 BM � SOIL STABILIZATION BLANKET 3.36 Omoo- TREE PR07EC77ON FENCING 338 DC OC DUST CONTROL 339 * VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICATION NUMBER 1. SET POSTS AND EXCAVATE A 4"X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS I 3. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. C i _ III 2IIIIII- / -I j-III-1 -� 1= -III -III_ EROSION CONTROL NOTES: 1. THE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO THE PRE-CONSTRUCTI0N CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPEC7ION. 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 07HER 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 INSTALLA77ON OF ANY ADD177ONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA7ON 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 S17E 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 774E EFFEC77VENESS 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 07HER DEBRIS. 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SEC77ON 5.1.28. 13 ALL INERT MATERIALS SHALL BE TRANSPORTED 1N COMPLIANCE K17H SECT70N 13-JOl 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 AC77WTY 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 FACIL177ES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT UNIT, , BUILDING OR 0774ER PORTION OF THE PROPERTY. 17. TEMPORARY STABILIZA7ON 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 50150 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 STABILIZATI0N SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LB511000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FER77LIZER 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 0-5X PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY 774E 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 IMMEDIATELY. 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 COLLEC77NG SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL S17E STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY 774E 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. 27B-ELIOAK LOA164-2 TO 7X 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 27C-ELIOAK LOAM-7 TO 15X 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 151- 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 257 SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 95-WEHADKEE SILT LOAM-0 TO 27 SLOPES. SOIL IS POORLY DRAINED WITH A VERY HIGH RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-10" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY 0-30". REFERENCE: WEB SOIL SURVEY ONLINE DATABASE, FOUND AT h ttp: //websoilsurvey.nres. osda. govloppIWebsoilsurvey.Gspx 2. STAPLE WIRE FENCING TO THE POSTS. 4. BACKFILL AND COMPACT 774E EXCAVATED SOIL. EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. SUPER SILT FENC5 ssF DWI TH WIRE -BACK os- NO SCALE 1992 SAFETY FENCE PERSPECTIVE VIEW DESCRIPTION OF EROSION & SEDIMENT CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES: IT IS ANTCIPATED 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. 774E 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 AC77WTIES 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 GERMINA77NG VEGETA77ON IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON 774E 77ME OF YEAR APPLIED. 3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PAR77CULAR AREA. 3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. 303 CONSTRUCTION ROAD STABILIZATI0N - TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE CONTRACTOR PARKING & STAGING AREAS AS NEEDED. 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. 3.07 STORM DRAIN INLET PROTECTION- INLET PROTEC77ON 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 774E PLANS 3.14 SEDIMENT BASIN- SEDIMENT BASINS ARE PROPOSED WHERE SHOWN ON THE PLANS. 3.18 OUTLET PROTECTION -OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF PIPES. 3.19 RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES. 332 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PLAN. 3.36 SOIL STABILIZATION BLANKETS & MAT77NG - SOIL STABILIZATION MAT77NG PROPOSED K17H THIS PLAN. SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS. 3.38 TREE PRESERVATION AND PROTECTION- TREE PR07ECT70N IS PROPOSED WITH THIS PLAN. SEE 774E ESC PLAN FOR THE REQUIRED LOCATIONS. 3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WIN 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: a. SEDIMENT BASINS AND/OR 7RAPS 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 REGULARLY FOR UNDERMINING OR DETERIORATION 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 FER77LIZED 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 77ME 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 SPECIFICA7ONS 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 N077FIED ONE WEEK PRIOR TO THE PRE-CONSTRUC77ON 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 ACIVITES W 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 ACTVITES AND DURING S17E 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 ■ , ■ I ■ ■ • l ■ .1 . �_ 1111 -11111 "11 �11111-11�III - 11111 _ III 11m . . • I Out illl - �11-11111 111111�-�1111�1511��1111 I I n�I 11111=11�-11d1-11111 �111�-111�_Iq�-1j11 ........... -J11� 0 I , ■ EROSION CONTROL NOTES & NARRATIVE: PROJECT DESCRIPTION: THE PURPOSE OF THIS LAND DISTURBANCE AC77WTY 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, WPO20170003Z 7741S AMENDMENT ADDS AN ADDIT70NAL 8.90 oc. 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 AN7ICIPATED TO BE /N THE SPRING OF 2020. THE WORK IS ANTICIPATED TO BE COMPLETED WITHIN 18 MONTHS AND TO CONCLUDE IN THE FALL OF 2021. EXISTING SITE COND177ONS' 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 /S GENERALLY STEEP AND /S WELL DRAINED. AN EXISTING, APPROVED SEDIMENT BASIN J/4, AND SEDIMENT TRAP 4C ARE ON -SITE PER THE APPROVED PLANS, WPO201700037 AND WILL BE UTILIZED FOR THE MASS GRADING PLAN OF THIS SITE. ADJACENT AREAS,• THIS S17E IS BORDERED TO THE EAST BY A STREAM PROPOSED TO BE PRESERVED. NORTH OF THE PROPOSED SITE /S 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 07HER ESC MEASURES ARE PROPOSED TO LIMIT THE P07EN77AL FOR CONTAMINA77ON OF THESE ADJACENT PROPERTIES AND WATERWAYS. OFFS17E LAND DISTURBANCE.• OFFSITE LAND DISTURBANCE IS LIMITED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL BROOKHILL DEVELOPMENT BOUNDARY. SOILS.' SEE SOIL DESCRIPTIONS ON 774IS PAGE. 774E EXIS77NG SOIL BOUNDARIES HAVE BEEN DISTURBED, AS 774E PROJECT IS AN ACTIVE CONSTRUCTON SITE CRITICAL AREAS: EXIS77NG WETLANDS AND INTERMITTENT STREAMS ARE LOCATED ON THE PROPERTY DOWNGRADIENT FROM THE PROPOSED DEVELOPMENT. THESE AREAS, IN ADD177ON TO THE MANAGED AND PRESERVED STEEP SLOPES, ARE CONSIDERED TO BE CRITICAL AREAS 774E CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOS17ED ON THEM OUTSIDE THE SCOPE OF THE PROPOSED PLAN. TREE PR07EC77ON 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. CON7RACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A PRE -CONSTRUCTION MEETING. 2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE AND PRESERVED SLOPES SHALL BE FLAGGED AND THE TREE PR07EC77ON FENCING SHALL BE INSTALLED. NO GRADING MAY BEGIN UNTIL THE LIMITS OF DISTURBANCE AND PRESERVED SLOPES HAVE BEEN FLAGGED AND THE TREE PROTECTION HAS BEEN INSTALLED. 3. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. 4. INSTALLA71ON OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL APPLY CONSTRUCTON ROAD STABILIZATION AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUCTION ENTRANCE DRAINS TO AN ADEQUATE E&S MEASURE. THE CONTRACTOR SHALL UTILIZE THE NEARBY SEDIMENT TRAP FOR VEHICULAR WASH OFF. CONSTRUCTION EN7RANC£ 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 7RANSPOR77NG TO A SEDIMENT CON7ROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 5. 774E INITIAL ESC CONSTRUCTION MEASURES AS SHOWN ON 774E PHASE I EROSION & SEDIMENT CONTROL PLAN, SHALL BE INSTALLED NEXT. 774E CONTRACTOR SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE. PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. ONCE THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, THE CONTRACTOR SHALL PROCEED TO REMOVAL OF THE EXIS77NG INTERIOR SUPER SILT FENCE ALONG THE OLD LIMI7S OF DISTURBANCE LINE, AND LIGHT CLEARING OF 774E S17E THE CONTRACTOR SHALL BEGIN BY CLEARING 774E AREAS REQUIRED TO ACCESS THE LOCAT70NS 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 SELEC77VE CLEARING. FOLLOWING THE INSTALLA77ON OF THESE MEASURES THE CON7RACTOR SHALL INSTALL THE DIVERSIONS THE EXISTING DIVERSION DIRECTLY SOUTH OF THE BASIN B CUT SHALL BE ADJUSTED PER THE PLAN, TO MAINTAIN POS177VE DRAINAGE TO THE EXISTING STORM DRAIN. ANY REMAINING EROSION CONTROL I7EMS AS SHOWN ON THE PHASE I EROSION CON7ROL PLAN SHALL ALSO BE CONS7RUC7ED AT THIS TIME. 7. ONCE ALL THE PHASE I EROSION CONTROL I7EMS 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 S17E TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. 8. AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE H OF THE EROSION & SEDIMENT CONTROL PLAN. UPON INSPECTOR APPROVAL, THE EXISTING SEDIMENT TRAP 4C CAN BE REMOVED. THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE S17E TO THE CONTOURS SHOWN ON THE PHASE H EROSION & SEDIMENT CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE AC770TY AND SHALL BE MADE FUNC77ONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I/ EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CON7ROL SHALL BE IMPLEMENTED AS REQUIRED. 10. PERMANENT OR TEMPORARY SOIL STABILIZA7ON 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 STAB/LIZAT70N SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 11. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CON7ROL 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 S17E STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS 07HERWSE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOSIT70N OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. GENERAL SLOPE Q 1 OR LESS) PER ACRE TOTAL LBS 3.11 Paved construction entrance for erosion control plans Source: Va. DSWC Plate 3.11-1 TABLE 33La ACCEPTABLE TEMPORARY SEEDING PLAN 61ATFRIAIS -QUICK REFEAENCE FOR ALL REGIONS R I. Mnti­ D.,,, 5uO , iL"-, S I,L 1 - Feb. 0 50/56 Mix of Mn.J RM. Valium Iu.0omm1 m & W-I Ce of (Wiser) RR (G� • •r klx 16 - Apr. M A ] Ryelm. 0.1 Mil I -Aug ll Gemun� wild ISeum. ww 50 Sw : Va DSWC TONL 70' WIN. -ONSTRUCT10% '1:CESS 3" SE 2A ASPHALT TOP COURSE r E X. 11- r, 2z� 42s PAVEWEN" � 5• M N 2 1 A AGGREGATE BA' PROFILE ;U' M'.N. r'_ _,N, -. I'. o. ,• ASPHALT PAVED AC-;:- . -WASNRACX „, EXISTING .^ 0 -721[ PAVEAAENI �2% 12' WIN.• 'MUST EXTEND FULL VADTN �J I�-PDSIiNE DRAINAGE )IFINGRESS AND [CRESS /1 TO SEDIMENT TRAPPING ING DEVICE ELM SECTION A -A A nwwluwt walo lap of l oic h uRLat be uL�l dlcd wTlh a nutwatuu 1 well balk oL I Nlntlott c ah a stgpphut>z a wadi hope ultll a Lhatlltin 01 1 . mthcs lol adequalc c010aul pleN:7ae Wash wale) IIWul be tamed awa} b(ina the nlllallce to all appl Qved .etlWl_ area to I auoce se/luuettl : W .. e.lu ueul >ha0 be pl et'ented h..Ul adamastonn c6atus. ditches oI w-akrcovii PAVED WASH RACK KENTUCKY 31 FESCUE 2 SEEDINGS BE UPON COMPLETION 128 LBS. 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 DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH TO MULCHED IMMEDIATELY VESCH STD. 3.32. OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. PS PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) FILTER FABRIC ENTRENCHED 6- co5RAc1'Eo soa � s' IwlnuM ; �I FIIFI _ _-III=III=111-111-111-11 I is, - -III=III=111=�11 k� m I II I _I - - TEi1�31T�T�ii 1=111-T-1TEIT1-i 1-T=wy- MINI01QM - TEMPORARY 18" DIVERSION BERM 1992 3.38 Source: Va. DSWC Plate 33&2 iCOTTTR. CBLUM Lic. No. 035791 08/04/20 z O a U � In w � Z U) O z _1C, O Q M (n F U� z ) QI `M W ce F z LU O U r z O U 0 N M n ILL! d In z g 0 LU In w W N N N !0 o In v � � o N t0 W 0 z 0! L9 z z w I� M Ir- M M N IZI- CY) I N C] M N N W J J j/� / VA Uj Of 2 U I w F- Uj co 01-1 w 1111 C� N z 1_� 0 ce ( V V 5� T VJ J W 0 W \W\ N< L.I� z JOB NO. 182150 SCALE N/A SHEET NO. 3 2 - \ . NOSE - i 2 6",— � �. _� � � � - \ � T EROSION AND SEDIMENT CONTROL PLAN IS AMENDMENT #2 TO THE APPROVED BROOKHILL SECTION 1 MASS GRADING VIRGINIA STORMWATER i \ NOTE: THE LIMITS OF DISTURBANCE FOR THIS PROJECT SHALL BE LOCATED ALONG THE SILT FENCE INSTALLED AROUND THE PERIMETER OF � \ � I / TI-j 0 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 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 APPROVED 16.18 ACRES), AND EXPAND UPON THE APPROVED PLAN WITH THE ADDITION OF PROPOSED SEDIMENT BASIN 8, TO TREAT \ 1 I I EETS �I\� \� \ DISTURBANCE IN THE NORTHERN PORTION OF THE TOWN CENTER PROJECT. SIl J�Er 8 & 112 / lSCOTT R. LINS Z 6 \ j W J 0 \Lu Lu \ \ 1 \ z 3 Z U1 LU z Lu U Lu \�\ � < 3 � z \ \ / V 1 � w C Lu o \ \ Luo U ce i 1 V� SEDIMENT B II 1\ I w DISTURBANCE I I I I I l n I o w N N ` A I \ \V PROPOSED WITH THISWNW///I / I AMENDMENT #2 o a N INo 0 U o III 1Lu 11 �� 1 \� g APPROVED, �/ �� /� \ 1� Oo I I I 1 \�� ©� .'Lo SEXISTING EDIMENT H TRAP 4C / I \ f �I Q / IIII I // o \ � \ o � Lu y� 1 I t � M � o AREA TO BE REGRADED o 1 AS NECESSARY TO I I IIII II I I I� . y y / �X / \ �/ 04 W ENSURE A MINIMUM IIII III IIII V / \ �� OF 2:1 SLOPES ALONG I I III �II� % \� u N AREA OF EXISTING EXISTING BANK ` A A \�v W DISTURBANCE APPROVED WITH WP0201700037 \ \ \\� VAS vv\�\� vv �O o > / AMENDMENT #1 � O \� \ / Lu 4ur �Lu 1 I o C7 �o Q U 1. — J o EXISTING SUMP (APPROVED ( — — I I I I / — 0� DISTURBANCE / WITH PREVIOUS WP02017-00037 a III �� J / o)Lu g PROPOSED / APPROVALS) TO REMAIN -SEE v A I 11AI\I IA";,, 0 I I WITH THIS / SHEET 6 &SHEET 10 U) 0 AMENDMENT #2 / I �I I I I I I I I I I = \ ;. o �++ �i ° I I I I I I ��� v z LU = w ������ I� • �\ �\ Lu = Z Lu w APPROVED, EXISTING o SBASMN 4T � Luo \ \ \ 'J j v, , 0 Q z N m o s 450— -SALLAMA ER STREET E — ------ = = — '•\ \ .., : l/ l / / / / JOB NO. / I 182150 \ asa J ` \� \ / l I / y /\/ /�� l \\ \ \ \ III I 21 N / / ` 6-/\� \ I \ SCALE k I I �\ 1 "=60' o 1 / L i \ \ I / I �� SHF 5 & 9 \�I 5� \ SHEET NO. n I, O s N FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS 10% LARGER THAN THE ■. I / / / ( (� — - // / j /j IH /Lli MAXIMUM VOLUME OF STORED FUEL. PHASE I \ ` ..DIVIDE O DRAINAGE EXISTING �\ \ SCOTT R. LINS�X N _■�-ram■ _ I w \ jyj�J APPROVEDLie. \ DIVERSION DIKE08/04/20 — / No. A 035791 4 c SSIONAL 'V&lZyG MATCHLINE, SEE SHEET 7 \S\ASS AIs ° 3 w ]�l S] / \ �� ■ \ \�S W 0 S I z L O 1 N z O Q W } > z - h CD N Z O W UI J U W Q M S. s \ s s 5 SED FROM THIS v I n EXISTING I APPROVED I �/�Ln V' O to > a w m Wu z A OC NON STLLLA LANE / i / ACCESS H a w g / // W aLn Lu P EI DRAINAGE I i I - of Lu °c DIVIDE �55 / / I I Lu Lu 10 \ EXISTING APPROVED SUPER SILT FENCE I WITHIN PROPOSED EXPANDED LIMIT OF / I Lu CD k 0 0 \ w DISTURBANCE AREA TO BE RELOCATED N / a o C C CD TO BOUNDARY OF NEW LIMIT OF - \ DISTURBANCE LINE PER THIS PLAN / �■■r■■r■■■■■■■■■■■■r■■■ �■■r■■■r�� / - �- \ PTOSE NEW--N LIMITS IF / - \ \ TURB CE EXISTING APPROVED LIMITS \ \ SSFI 'PROPO ED F WIT IRE I I I OF DISTURBANCE N �♦. D C I G / co Z N �AC co / PROPOSED EXPANDED LIf1�S � / � / � I N CDLL/ � Z " OF DISTURBANCE � AREA / / � / / / _ m N Q - �j ESC / I Q �: _ PHASEI / - — > O SEDIMENT Z I LL BASIN 4 / / Q z / --- cn ; 16.02ac. �� / I > O N Lu N I O Z -- z Z I w Q p _ w \ N cn = TS N / —z Y U z I � �� �� SSF- F \ i / �■r■■■■■■■■■■■■■�I� / Lu W O SSF N ■ EXISTING _ I I I SSF sSF ■ APPROVED DIVERSION DIKE �J J O I F�ssF�ssF -SS \ ■ I _ w 6 Lj J outages** SSF SSF ■ � ■ r■ / / � i =ui _ s s� ■■■■■� SF SS SSF SSFSSF—SSF— ° s .° ° w w P POSED - w SF IWIRE w w w w w / J Q p F �w� CKIGw SSF POPO OALAMA/NDER TREET / / / / / — _ _ BACKING O oN ae--77,�---1 e — — — — — — — — — — — — — — — —1�-- --- — —a------- /� / \ �JSS S �n / T' ASS ASS ASS jS JJ — A J SS ASS �» jSS'- SS ASS 456 T i S ASS I \ / / / \ \ W O F tu w \ \ \ I \ \ I I \ / I / / / \\ \ JOB NO. \ s w s -43s rn o. jSS��SS ss— s � �'G A C L XISTING ROVED LIMIT / / S— -�Sy ass / �/ �s� \ KEY \ 182150 s� J s� I Ik / 3 15 30 50 / F DISTURBAN E 1 A 120 E ISTI G A PR'OVEDlUPE / S q 3�— Vv S 1 \ yss / 55F \ SCALE / I T FENCt T / jss 1 "=30' N FEE 1 in( 3f IREMAIN \ \\ SHEET NO. RO,TOSE SF BITH RE , - / PI 0,, —°� SCOTT �S�Z - IROPOS TREE/ROTECTION OU- Lic. No. 035791,E I I I III I FENCING TO BE INSTALLED �' \ \ \ IEli \\S�S\F _\ PRO�PwZ�JO \;'1�1'111 �■/�■/�/■/�� /■�//■�NI �\�\p■ C \ D�/D\ � MU —DD•�--°� sSF _ / /II I�I I II II I� —1 I 'II►I �■�II•—I ■_■■� �'\\1II \ I V'• I I:V1I I•III •I \�II� III\1 II II\\I� IIII I� = \I \�III IIII \\III III I �II1\\ISI�I�■IIUI 1 \III/ IItI �I \\VI\I •I� I\IA \�/ 1II\ II\ II IIIIIIII \ I\\III I\) I,PIIIIIIIIC\II �I\IIII\\II\•I\IIIIIIIIISI`I \ VI S�VIIIIIIIIII�I1I�FII AIII�CCIII I\1II I \IIIIII\\�IA��/IAII■ I V IV• II\ �I A I II //II \ III\ / AI I \�I \II I�//I/ I Iv/I/ V/I�\• / \I/I\ \ I v /� vIv/vT E�I/T/ /// lS �\/// � /� / �■�/!/A / / �V I //Vv/ ■/ A////5/ \5���l� \/// /\ // V/v/ /_v/I A/ vA// / V�/ I -A / ����_I// I I I I/ / AI\\/aI l aI // I�,\ / I// I / v�I//s�— IIII/ / II/I\_/I1/vIII/I1/ I_ II/ 1\lI/IIII�I/1/I�II/1IIlII II 1// I/II//III 1l\I �I\//I�I I I �/SII�II/( 1 /I/�I/ II 1II I III /1/sI /I 1IIII�� /\ II II�II1 /I1IIIII/I\II \ I II / N /�II�III / ��I/I/ I\ lI\ �FI III/ �I— I/I ! I I�/Il�II\ �1�.II \II v 1I �aI-I 1I\ I III �/II- I \ 1 I II�sIIIIIs II/II 1 V I I \ II/ �I�/IIM lI/ I \ vIII I I I /I\I /I IA I \ I l I//I/ \ I/I IIIIV/I/II III�II,V l/lI \\IAII,I� III1II SA\lIS/ IIT I\ I1�II\ II I / Il\\ I/I\IIIIII I III �_—1v II/ �II/ �IV/I 1�/I/II/ ��1IIII \1I I \ /lII I—' I 1I 1\/1 I/IA l \\ I1SII\ 1 s �/ lI1\/VII /\\ / \-I \I?� — AI_ / I \ I I �I \ 1II / VI IlIr 1A I\1I\ � �II � I/I 1�IV1sI�SI�II// v/ /I�I ��I IVlIA IvI�II\/l�� / �I�/I AIs I� lI/ 3\I�l\IA 8�V \ 1' /2II � /I/l 'I/IvII\/I��\ �(�/ 1I/�I /II I �\I T/\ I �I� �I �/l I ��I �I/�l \ �\iI I /I I �� ��i\ v1lI � \1l/���// \/���sV�V\\'�I �\ 1�III 1)� V\/\'/ /�%\\�I �\� 1I I\�A/v\� / \'JT IimI `/A�/A�I/V /\// \\/'- / I\I� /II\ I //I—�I k� //r--_ _ �\�_ %- -I /—I°/�I x \I/_�I_ �\/A�_�/� _\ �/�i\/-I A�� / /I _ /_�VI•oV%\� _/�\I \/— �%� � \ \ \ I� � \\Jl�\—� I \ I\ \ \ /VI \ I A/ VII \ VI�A I\ � A�V��\\\ A� \ A\•/\I. I D�\iI �I IA A\/\�`�e/ �' V\�\,I \�//�\�I♦ A/ s���♦ \ AI A�1\ A \_�\ I \ 1\� % II\ \OoA� IASI, \ \II�V \ \ I /C ' I� ♦�V�\\I /O\ �\/ \ �/I-\\\ �/I \ \V j\\�♦ P1\V,\x�\ -\iA\ \\ \\ \\ \\\ I ► \A�l \I \A\\\ \ \ �\\\ °A��saJS0 8�NoNozw�.0a/ .,0 _ 4/�ogLu2 MITS 0P S JTSF DT EXISTINGAPPRO CTEXPANDED LIMITS SED DIVERSION DIKE v vTz��QoQ,JZp�p OF DISTURBANCE LINE (TO BE MODIFIED) v ARE - ,i MA SEE SHEET 8z , z � PROPOSED ADJUSTMENT TO EXISTING / DIVERSION DIKE FOR SEDIMENT r o BASIN B TIE IN CONTOURS / w�o o o(zNOTE: THE EXISTING SLOPES IN THIS AREA SHALL �zBE FIELD -VERIFIED TO ENSURE A 2:1 (MAX.) GRADE EXISTS ON THE BANK. THIS AREA SHALL I BE RE -STABILIZED IF GRADING MODIFICATIONS �ROPOSED EXPA16ED wo zARE NEEDED TO ACHIEVE A 2:1 (MAX.) SLOPE. MITSOF RBANC`,voDISTUEhII I /�/ RQWNDIST`)�IN UPI�fiVb \ROPQSE z MO F- oaLu zEXISTING STORM STRUCTURES FROM Z APPROVED WPO PLAN En TO REMAIN EXISTING, APPROVED w CL E\X TJG�STORM INLE\ PER SILT FENCE w 'RECEIVESvv FROM N a>REMAIN W k5TDRSION �o ° �E, AND CONVEYS TOwIs NG SvEDIMENsSF—SF— Ln A%N. #4\\ w /V ISTING, APPROVED LIMITS OF (NcDISTURBANCE LINE ¢r4 N00 O WETLANDS, P. °I 0 00\I EXISTING C APPROVED NDIVERSIONDIKE o co zoN0Qo NU 364 Qno L���Lu ZW 0lbEXISTING, APPROVED J SEDIMENT BASIN #4 Q Qwo Wz WUl 0 > O/♦ ww Lu —SSF ssFSF SSF SSF SSF SF SSF� ■sSF cDQ sSF AM NDERSALSTREET BACKING J u0 O Wx o droe No GRAPHIC SCALE 3B° ao o 15 ao so izo NG 182150 03NN°o3ao- °Oo / APP ED SUPER ySS j / ` —� KEY o SCALE SILT FENCE" h/ o ( IN FEET) � — --�� — 1=30' 1 inch = 30 ft. I I I I I Tp EXISTING A37pPPROVED TREE — \ SHEETrvo. a PROTECTION FENCING \ \ \ \ Orr GRAPHIC SCALE *� /—��\•— �� _SCOTT R. LINS�Z \ 30 0 15 30 60 o A / \ V \ \ L� Lic. No. 035791 � / �� TP PROPOSE _ \ \ \` \ \ \ 'moo \\ \ ,� °� 08/04/20 �4 \ / / REE PROTE ION / \ FENCING V A V A V\ \\ � V A A \� �� A VAV � v A, ( IN FEET) � � � V �_-- ��� / � � �SIONAL E�' 1 inch = 30 ft PROPOSED NEW / V LIMITTS OF \ \� �� A VA A \\• z Ln \ ess \ DISTURBAN V'ASS 0 V c z o _ _ A PROPOSED A \ v V A A A SF WITH WLRE�- \\\\��� \\V� — - V A V A� \ \ w o B_� v \ BACKING \ —_ — �/ �\ V V� A� z � U) AN a w D a � — PROPOSED I�A V �� \�� ( \ -_� / — A\ V A V A V A \ \ \\ \ V��� — - A A w z o EXPANDED LIMITS �� \ N \\ \ \�� i \ \\ \ \ \ \ \\ PROPOSED _FIATVD�TCLASS A[COAR AGgREGATE /� n m 0CN co OF DISTURBANCE -- ♦� �55 \N \ \ \� — / \ \ \ \ \ OP � > Z w w / \ \ \ \ \ \ \ OUTLET PROTECTION EOTEXTILF FIL ER FABRIC o m w 3 AREA �� \ �� �� V �� � _� y y \ V A V A \ \ \ V� V UNDERLAYMENT. FABRIC TO Bt'KEYED INTgEX�,ROUND 9�� _ 0 ¢ r r ¢moo \� V A OVERLAP _ � Lu AT ENDS &ALONG PERIMETER. BRIC TO OVERLA r w 3 SSF \ �\ v v �� A �� _ _ - H w a \ \ \ MIN. OF / z 2 \ G APPROVED SUP SSF \ PROPOSED \ \ \ -W2=15', 18' M �/� j m a \\ \ \ \\ \ \ N I FENCE WITHIN PROP / SSF\ SSF— \ y \ \ _ _ PROPOSED SF WITH_ ` GREENWAY \ \ \ \ \ \ \// w J o \ \ n \ S F� \ \ LIMITS OF SSF WIRE \ ` TYP. \ \ \\ \ R I \— c[ ¢ z EXPANDED IT OF s �\ N �� \ — — \ --- I — FBI N a \ \ \\ \ DISTURBANCE A EA TO BE \ SF\ \ \ _ _\ ACKING \ \ \ \ \ \ \ \ g o \ _DISTURBANCE \ V \ \ w p m\ \ \\ \ Qo\\ \\ ELOCATED/TO BOUNDARY OF / \ SSF\SS \ \� \ — — \ - - - - \ \ \ \ \ \ \ \ \ \ \ \ \\\ \ \ J I / 0 U) \ �\ EW LIMIT OF DISTURBANCE \ \ \s — v _ — - A \�'v� S \ \ �. A �� —� uj p o \ / / 450 LINE PER THIS PLAN j \ \ S \ \ ` ass �ss� \ \ \ li F S — ass \ dSS� V A - w ° EXISTING \ \ �S \ ` J N m o \ V APROVED LIMITS ��� V A A �S ����-� V V AASS \ o- - w V / 0� DSTURBANCE \ \SSF ■� ■� ■ ■ A v \ \ \� \ / C o PROP ED 18 \ DIVERSI CONTRACTOR F� A SHALL ENS POSITIVE \ A �0� \ \ \ \ SSFV\ \ SLOPE,tS MAINTAINF� \ V A \ + + �� M + �5S N o 0 0 0 \ \ \ \ \ SSF BERM SHALL BE \ V A \ + I >�S w C C C S \ + - + v A -FIRST \ ¢ IC�STURBANCP - - o ° o +-_ -o t.. OD D PROPOSED 18" I `� \ \ \ .� \ \ � DIVERSION. CONTRACTOR I I + SHALL ENSURE POSITIVE MU \ \ \ \� \ I O \L9 SLOPE IS MAINTAINED. N \� \ �sT «++ ++++ + +' - ++ I \ ' BERM SHALL BE \ \� M STABILIZED AS A FIRST EXISTING J �'+ +`+' + + I �+ + + �J STEP IN DISTURBANCE. / / + ++ + + + /� m APPROVED / / / _/� — z 0') z \ n \ DIVERSION DIKE / / I / �♦ + + + + , / ++ ++ +++ ++'+ I s �I V /Xv� + _+ CONTRACTOR SHALL INSTALL A \ S +, / - �� — — B a R WD R/W DIVERSION ACROSS THE ��� / �� - /+ + + + CONSTRUCTION ENTRANCE. - / �� — �_ - Q �� + / - w CV � A PROPOSED PAVED � � � � � � � � � \ CE CONSTRUCTION ENTRANCE (12'x70' MIN.) w/ WASH RACK - w Q J &DOWN GRADIENT DIVERSION N & SEDIMENT TRAPPING DEVICE M o LL (� -, (. J Q z t - -- 0 P +,+.--� - - -- '+ + +' - - EXISTING PROVE SUPER \ \ \ \ \ \ \ \ \ss 1 ( SILT FENCE WITHIN PROPOSED + + � _ p�p v I LU � \ \DISTU BANCAN DE AREA BE +++++ _ 4 T� L `o - - -�- - - - - - RELOCATED TO BOUNDARY OF + + 0 \ Lu N \ \ SSF \ \ NEW\LIMIT DISIYIRBANCE + _ 3 z ❑❑ \ \ \ \ S LINE PE HIS PLAN Q Q \ \ZsF + • I N \s \ \EXISTI \ + - - �- O Ln F + +++++ + + + + + + + o \ \ \APPROED L \ \S OF DISTUR CE M U + + SSF = , 06 \ _+_..-.. r—.+++\++ is Y U z \ ■■■■■■■■■■■ ESC --- - — — PROPOSED \ \ ____--- --- - ---- g5F / w o I I I CRS CONTRACTOR PHASE I \ \ �\ \ ssF�s %' F/ / � W cn F N I I LOCATION OF PARKING& SEDIMENT \ _ — _ _� sF\ 1 `� / ss / / '�^ O N PORTA POTTIES �*... STAGING AREA BASIN B \ \ \ \ \ — — \ \ SSF /j, '. \ i/ / / vJ w N LOCATION OF 15c W J / / z DUMPSTER ��♦ 1 I \ \ \ I / / jL / .�/. j� � \I /\ // V7 / / Lu J w z �/ U ��� V) '—' Q N z THE FUELING TANK SHALL BE COMPLETELY � \ EXISTIN�,/A P OVED SEDIMlE TITRP,�4C ASS �' / /��� U i W ° SURROUNDED BY A 2' DEEP, 2' WIDE EARTHEN BERM ♦�. \ (DRAINS/TQ PR POSED SEDIMENT BASIN B) WITH A HEAVY MIL POLYETHYLENE LINING OR BE / 0 Q LOCATION OF PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. ••�� \ / / / / / / / �/ / / I SSF�SSF pROPOSEbST6C�KPiCE / / / / �\ % \ a O / I I I ■ FUELING AREA THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN ��♦ / I I / / / / / / �C _ -SURROUNDED BY j / �j j / 0 FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL N w ENSURE VOLUME CAPACITY IS 10 /o LARGER THAN THE ~ \ I \ / / / / SILT FENCE/ \ / / / O O U _ �/ 1 M N N MAXIMUM VOLUME OF STORED FUEL. PHASE I • • • ■ ■ • �� / / / / / N W \ F DRAINAGE I ■ DIVIDE \ \ \■����� i / / EXISTING u F r / n . APPROVED \ \ \ _ i w E DIVERSION DIKE \ � U >- �■ MU v / / / e $$ ■ \ \ \ \ JOB NO. / \ \ KEY 182150 0 MATCHLINE, SEE SHEET 5 \ SCALE o 1/_ ' O • '. oe C �� /. S, �. .SS\ SHEET NO. n SS♦ n i \ v Oo v \ v�/,\ ; / � y �s ��� Oo ♦ 1 \ � V A V I IIII I I � s .0010 'G \1 y I \ \ DD \sv I v I1-1 T] A TI T-M" 0 /" A T TP SCOTT/R. CtTLLINSZ Lie. No. 035791 "ZI 08/04/20 'e tiSrONAL 1 30 0 15 30 60 120 . - — — / LIMITS OF 1 inch = 30 t. \ \ O / // (IN FE T \ \ O STREAM, TYP. Oj 1 Ln Cc P PROPOSED FLAT VDQT CLASS Al COARS , , IEG TE �� �\ ----- -- - O — �_ \ O s ` ` \ \ \ o Ln OUTLET PROTECTIONw1GEOTEXTILE FINTOL ER BRIC , - -- — - \ \ \ \ z MIN. ENDS T.ALONG PERIBEK RED I B I \EX. RO RL � 9�j _— — ---- \ / - \ \ \ \ `s \ ` \ \ \ O z FABRIC TO \ \\ --- MIN. OF 9' (L=33', W\ W2=15', 18�M�1) I l / — _ - - I - \ \ \ \ \ \� —Y _ �` \ O \ V / s _ y ` \ v�— - ----- — --- — v — \\ \ \ I I I PROPOSED 175 66 PRESERVED _ — \ I OF 1.14 w III RCP STEEP SLOPES, — — \ A \ \ v s� \ \ V\ \ @ 11% / VDOT P. — \ \ 0 \ �Lu STD. EW-1 v - \ \ A \ v v A \ T -i PROPOSED 100' WIDE VDOT CL. AI RIPRAP N _ — LINED EMERGENCY SPILLWAY CREST ELEV.-396.66'. SPILLWAY TO HAVE 4:1 SIDE SLOPES FOR VEHICULAR — -� TRANSITIONS. -- — \ �Z� �'�_ _ A V A \ V \UOLn � \ \ - - - \ 10 WIDE TOP \ \ // 1000 — __ _\yam \0 I — \ /— — A v A V \ 0 \ / OF DAM \ -� _ \ / \ \. -ELEV.=398' v _ y DID\ --- �5= SS dSS 5>l �`YSS�,. \ \ \ \ \ A PROPOSED SUPER SILT FENCE \ DA=2.35 AC. 50 L.F. SSF \ \ \ \ O �X\ 0 O1L.F\/0.25AC. \ jss ass \ / / / \ \ \ \ \ \ \ \ \ �ss� \ \ \ \ \ \ \ \ o I I P ,, - � _ + — /SS` � � �►- s �SS ass_ Ss � , / \� / � �— \ \ � , � \ \ \ \�s \ , \ �\ \\ �s I v + + + PROPOSED VDOT STD. B 1 (048 REINFORCEQ CONCRETE♦. / / \ \ \ I I I I / ` `� I " — - - — — + OPENING) TO SERVE AS 004 "ESC RISER STRUCTURE: -RISER + TO INCLUDE A CONCRETE \ FOUN / ,ACK. SEE : I I II I I I I II \1 \ II I \ O�yN \ + + + + + SWM DETAIL SHEET FOR FOUNDATION & TRASHRACK +++ ++ gM D iKz --- ---- STD. IDETAIL FOR ESC RISER RIM ELEV. 9566 WITH DEWATRNG " ORIFICE ++ AT 392.3'. SEDIMENT BASIN CLEANOUT ELEVATION__--39 POSED- 0.98. — I I I asiN I I I I / + ZINIDE PROTECTIVE SWM BARRIER APPROVED SUPER SILT � X NG, FENCE I — AROUND THE RISER NSOOa E -O BE REMOVED AND TIME OF HE RISER TR TUR_RELOCATED TO BOUNDARY OF NEW PROPOSED SAFETY FENCE, EVERSION TO A PERMANENT SWIM RISER. SOSWM-PLAN . PROPOSED LI:TS OF DISTURBANCE INSTALL SIGNS "WARNN— FOR SWIM BARRIER DETAILS. LINERTHIS PLAN I I I I I I \ I I I I I I I I\ \N I I II II I I I I I I II II II ( 0QUICK SAND, -KEEP -OUT" . / -� EXISTING,APPR���� I I I I I I I I I I I I I I I I I I I I I J I I I I — 'S5 —ssF ssF—SSF SSF SSF SSF—SSF F SSF�gSF�s LIMITS OF DISTURBANCE .� \ I I \ I I J I I I Lu F SF PROPOSED P / OF DEXPANDEDLIMITS I TS W — S I�-- — _ _ _ — — — — \ \\ .• / I ARE O7 I I I \ ' __-- —_ --- —_ I I I \ ` 5 �W— I / I / \5 /�i � a �v ��A A� VA\ \ / / / ` IPROIOSEb i� / / �� / — — — �� — ♦\♦�V\ \ I I / \ / I� ILIM1TS OF I \ I I 0 �� / \:� ��.• _ — \�` \ \ \ I / / / / / / DASTUkBANCE / �/ // � ■�■■■■■■�■ 1 I I I I III _ — i / / / \ / / i 1 I I \ I ; � — / \ ` \ s�� / l R OSE SF /mu ITH W RE �BACKG Z, /PROP0SE6 TREE ROTECTION I/ I I I I \ \ DD II II ■■� I I II II II II III II II II II IIIII II IIII I_ r__ /\/////// �/��/ \\\\\\w\ \\\ENJNG SPISTALLED O PROPOSED ALONG LIMITDISTURBANCE EXISTING APPRO EXPANDED LMITS- E TO PECPR POSED/ DIVERSION DIKE ]OF -DISTURBANCE ELITNE (TO BE MODIFIED) � \ \ \ \\ IIII IIII I I I I I AREA MATCHLINE, SEE SHEET 6 KEY v I I I III I I I _— �/ I I �I I I I I I �I I I I� I I I � I I I T• � I ��`. `I '� \ PR / \DIVOERSIONJD KEMFOR SEDIMENTNG I I I I I I I N -- i / i / SSF / / ' \\ \ DD BASIN B TIE IN CONTOURS ■ III III 11 IF /55_ _ _ �/ / / / En z z ;w i g O U i i 0 U i I N re N) n Lu a Ln z I to lL I w I � O O O U W N N N 0 ko N N m N kDD v O 00 y n U U O D N O JOB NO. 182150 g N to n SCALE 1"=30' 0 n c 0 SHEET NO. n n 8 J N FUEL IN TH SPILL. CONTRACTOR SHALL < j J I I I ■ ENSURE VOLUME CAPACI IS 10% LARGER THAN THE LLJ ` : MAXIMUM VOLUME OF S UEL. N \ \ ■ — �\ __ /J �� 0 t�SCOTT/R. CDLLINSZ °. -^ \ ■ MU — - - --------- � Lie. 0 /0/003579�' 16 / ° \■ PROPOSED STOCKPILE\ \ MATCHLINE, SEE SHEET 11 SURROUNDED BY \ SILT FENCE II II II II II II II II II II II II II II II II II II o��SSIC � .•�� V A � \ o: SSF ■ �Ssg • F __- PROPOSED PHASE II MASS F—� — — — _ - -- \ GRADING CONTOURS i I a r a ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■*■■■■■■■■■■■■■■■■■■NONE ■■■■■■■■■■�■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■I■■■■■■■■■■■■■■■■■ Z w �L O z J � Q s s s 5 5 5�5 5 I 1�1 � N I w H � F =�Ss L c/ / / — ■ MU 1 � �� ♦ DITCH ASSOCIATED WITH IC 1 E RINK / - / / ♦ PROJECT, CONVEYS OVERLAND FLOW Ln z - w � g O U }y i Z O U O n oc w a z c 3 j w Ln �w cc AROUND PROJECT AND INTO I w N N N / / I EXISTING STORM SEWER = a 0 N N O ESC 04 N W i I PHASE I I / 442 442 _ \ PROPOSE NEW N • SEDIMENT / IMITS F �I TURB CE 1 BASIN 4 / 446 1 EXISTING / 13.08 ac. • APPROVED LIMITSPROP SSF F WIT EL9 RE OF DISTURBANCE P G • / DC ti AC I • P / M , / V • Ts / / / z Z ♦ -- �- / II • _ EX ROW II ♦ / / cy) 0 I / / I I I • PROPOSED &�� I I I • EXPANDED ' NCE / / / / ICE RIN ARCEL PROPOSED UrER / _ / c OF DISTURB ( \ / • AR / S ARATE SET OF PLANS N � II EA / / W N V ° z � I •D � N V1 I \ III o • - --- // I > a / 1 w Cn / IP _ /Z Z >> O � / o w 1 / / I \ �� ■ Mu -- --- --- - / / -0 U) z o � � ■ \ �/ / / I 1 w Q z / I ■ Z = Oui ■ \ / U \ / / I J —v Y U Luau I P 1 w w as II= / PI_ D(nz U) // i 11 � J o I • / i I I w � � ✓I N \ : \ DD PROPOSED \ / z w O ■owns■■■■ ADJUSTMENT TO / / H� I «tl tj PERIMETER DIVERSION w _ / / aIla NI — _ _ ■ Eno mamm ow , S.�T�S. S..p . 5 5 ° S s -s. °.% 5 L' g g. .5 . ..5 _'° ''.°. • ° . -. , ■ ■ --- --- - \ 1442/-- P OPOSED �- YYY � / / / _ / I SSF SF 1NITH WIRE I Q Q ---I - ---- / I B CKING GALA ANDER / / / / / ' SSF PROPO O 5 / TREET / / / / / _ — — — BACKING O 0 N W / \ \ — — — s — — s — — — — — — — — — — — — — — — — — — — — — — — —�— / \ \\ W H S ASS —ASS —ASS iS �Ss- —ASSS� ASS— �.>., ASS— SSJSS� S ASS N / � 4 Lu ass JOB NO. dEXISTING s� 182150 Y / \ -438 \ �S� ss\ G A C L APPROVED LIMITS I "ss / / / �ySS \ \\ \ KEY J (�F DISTURBANCE \ 1 E CISTI G / ASS �3 F \ \ SCALE 15 so eo 12o A PR�OVEDIUPE ILT / ASS —ASS — A 1 n=30 REMAIN � ( N FEE A V A SHEET NO. 1 in 30 ft� �5k I I / / �� Sl`dS \\ 9 /i 0d Li Lic. No. 035791 - - - j�� 08/04/2 PROPOSED STOCKPILE\ osStoNAL SURROUNDED BY MATCHLINE, SEE SHEET 11 SILT FENCE \ ME I I ME I I ME I I ME I I ME I I I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I ME I I O �/ \ ssF ■ ——— — L \SSF ■ _ _ _ — — — PROPOSED PHASE II MASS �fF — — — - GRADING CONTOURS p T I I O J L ■ I cIf ■ T ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ * ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ NEON ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Z ,`ni, m L O p (n L Z J s F L � ■ / �A Q � F�1 L ■ ' LLI DITCH ASSOCIATED WITH ICE RINK PROJECT, CONVEYS OVERLAND FLOW U-) > z ;w 0 U ; z 7 0 ' U i ) N re) 1 � n Lu ;a U) ,Z 3 . p At I / AROUND PROJECT AND INTO _ o N N o Lu EXISTING STORM SEWER — ¢ID Ln IT cn ♦ / 40 i ESC 4az PR OSE NEW N PHASE III 442 / MITS F I I I SEDIMENT aas °• DI TURB CE ' EXISTING BASIN 4 / / . APPROVED LIMITS aas SSF FPROP ED WIT IRE I OF DISTURBANCE / 13.08 ac. / / I IAC 4G TS Zp L9 Cz II x ROW as / M H� III I I o � / I I . PROPOSED EXPANDED LIf1ITS ICE RIN ARCEL PROPOSED UrER / _ / � \ . OF DISTURBAANCE / S ARATE SET OF PLANS AREA / W N v II __ W P W J z J Q /--------f o � 444 ■w zL9 i - o — I I / -� - o I T / Z o P Iw Q z I� - Z W ---- ----------- ------ ---- --- -- ------- I I O - - - o iz � � � � � � I�I�� Lu ® - I®I ® ® ® ® ® ® ® ® ® ® P / - U Y U / I— W Vl PS / I I II II II II III II II II II / P ' E W cz III u II II, II u IIT II IIT II IIT II I, - �I �I �I �I I, �I I, / / P I - I I I II I I 1 I I I II II II II II II I •;. :. � I I I I I I I I I I I I I _ ° II II I II II II II II II z ° �_--JI--JL---L---JL___LI__---JI--JL--JI--JL---JI---JL--_J___ °.--_L---�--_L--_L--_L--_L--_L--_L--_J--_1-__L___L___J___ I s14� I aaa I II II II— BUILIDING #1 BUILpING #2 \ I ' Ln O g S u u o u u 18 APARTMENT UN TS / I W J Ln 14 APARTMENT UN'TS / I II I II I II II ui I •:P III I II I II I II II LJN � u I I \ Y I Y I I II DD / \ ^ W = i — U)ME IN 0 0 Ito N .°/ _ Lu ss u,s- s—� 0� O Q �aa2 PrPOSED RWD / � � P � / I SSF SF 1NITH WIRE J Q O ---I — - ---- / I BACKING LA NDER / / / / SSF PROPO O / TREET / ' _ — BACKING O C) �SS � S ASS ASS --ASS —SS -ASS=#SS SSS SS iSS�1 S is U) Lu ASS �� JOB NO. \ / \ w ® JSS EXISTING / -`5� \\ \ \ \ \ S G A IC L APPROVED LIMITS I / / s \ KEY 182150 OF DISTURBANCE EyCISTII G / S 43�— \ V A SCALE 3 'p 15 30 60 \ 120 ' �js F i i PROVED �UPE °ss / SS \ „_ , / ILTFE�tTC �� -4ss—JSS \ 1 =30 REM Irk � � V A� ------F--- in N FE30 f /� / / A� SHEET No. �,6 / / 9A \¢4p CE WITH (WIRE 0 ak -438 MATCHLINE, SEE SHEET 11 — \ SSF` • -o_ — — — — I PROPOSED PHASE II MASS f s�F GRADING CONTOURS oU 1n / \ . z Z f T� zo V r■■■■��■ ■ ■■■■ ■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■■■■ ■■■■■■■■■■■■■■■■■■■■■.■■■rri■Z �g� ■ I I EXISTING STORM ' H f w STRUCTURES FROM �/� m > z APPROVED WPO PLAN V/ N g 1111 TO REMAIN \H\ L d Lu ■ / j / / ce o vi ■ W aw S ■ _ - Ce o � � --- Lu / ■ ♦Lu 4w \ \ ' /,Z NOTE: THIS SHEET REPRESENTS a ID L a rN THE SCENARIO WHERE BLOCK 1A / —F ESC IS CONSTRUCTED PRIOR TO THE AN PHASE III PROPOSED ICE RINK. ♦ SEDIMENT EXISTING BASIN 4 w APPROVED LIMITS 13.08 ac OF DISTURBANCE / . D C / w _ n rn ♦ / / c X ROW : / / / / / I � - _cNi � M N I PROPOSED � / / / ' ' / N I EXPANDED LIM TS - _ / / / CD L.L Q �♦ OF DISTURBANCE ( 1� N V AREA �► ,� i Q o \/ MU I - J / / o ♦ �y > V Lu z Z1, Z1, i Z1, r Az I a PROPOSED SSF SF WITH WIRE BACKING I i I 1 o Q z o CZ- °. 0 — 1 z � / f ® ®®I ® �® �® ® P _ W / Ln S r r r r r a---L---�---L---1---L---1---L---1---J---1---L---1---J--- Ul (n W BUILDING#2 DD / / / ■�■■�■�■■�■■■■ ■o■■■�■r�H� LL] 14APARTMENTUNITS ; / / ■■■■■u ■�� I I j w ` ----i— pROPOSE6rt-------r--- / ■w LJ f P [P DD ADJUSTMENTTQ� ����� EXISTING Z a r� r� PERIhfi&TER DIVER, \ r� r� 'APPROVED I ~� Z SALAMANDER /TREET I� �7S —iss —issAss — -js ---7jtS— \ Y YI " IGRA�HIU �;UAI b 15 30 60 N FEE" / ( 1 in 30 fk n SS V / EXIITIN I �PPROVLD U PE &NCEMAN/R dSs_�ss ` \ SILT'F TO f k5 � II DIVERSION DIKE/ I \ � = W •..���00� ..... i / G F E — —S SF�SSF SSA SSE \ E S SSF —S � J O Q 0L i IP J Q _ SA PROPO ILLNILLL Ul / BACKING S \ ON M W = LLJ / SS is cn F / �// /� � ----, —_�\ �� W a W ASS / �\ a �P JOB NO. XISTING / / / / / / SS—� �g s� \ �\ \ \ 182150 7ROVED LIMITS I s DISTURBANCE ' SS / / A 3R — Is, \ KEY SCALE 1 11=30' SHEET NO. 98 t OSE ■I I I I I I I I I III I I I — / / / /MU / RBACK NVGEF ■IIII I I I I I III I I / / / / / / SCOTT/R. C1,*tLLINSZ ■ I I I I I I I I III I I I/ / / / / / / / TREE ROTECTION/PROPOS � ; �O U Lic. No. 035791 FENCING TO BE INSTALLED O \ ALONG/LIMIT LIMITS F DISTURBANCE \\ \ \\ \\ o °n 08/04/20 w4� ■ I I I I I / / / / / / LINE TO PR ECT PROPOSED / \ \ \ \ �SSIC / ■I I I I I I I I I I I I / / / TREELINE/ ■ I I I I I I I I I — — _ — ' / / / / / I I I MATCHLINE, SEE SHEET 10 � v \ \ \ I I I I I I III I I I I I I III — i i' MEN I ME I I� I I� I /I I I I mI I I 1� I I 1 1 �������' ��� ■IIII II IIII I II I� ,-- /� ,— SSF / � � \�� ■IIII II III II I —, �/5 _— ;,� �� / i \ \ \ \ �� \ \ \ ■ I I I III I I I _ / �F / _ _ — / / `/ / / ■ I I I I I I I I I I I I I II i� � SF/ �� �_� / /� / I � / \� -,�� ( c ■IIII I I I I II I I II I I I II I III F—SSF— -- — I/// -VA- • • • • • . I I I I I I I I I III I III w � ( PROPOSED EXPA46ED ■��.������••� ••••••• �II I I I I II III II I F 0 a LLIMITS,OID ST RM IN -' RQW DISTURBANCE TP�SE ETSuA uco Lu - F A A EXISTI STORM \ 1 \ \ \ \ \ \ \ \ \ N \ \\ \ \� ... I I / / �1 \ ) \ \ \ \ �\ \ 1 I O � F ' \\ \ \ I \ ,A > z STR URES FROMLu 'OVED WPO PLAN / TO REMAIN \ \\\ \\ \\� \ \\ —� EXISTING, APPROVED \ \ \ \ — \` \ / / \ \\ \ \\ \ \ \~ / I \ \ IST NGS�fORM INLET\ \ 'WPER SILT FENCE 70 ItING DIVERSION \ / ,REi(ES FLOW FROM \ \ RE IN \ \ O / \ •\ \ \ W ; — / t,% AND GON�EYS�TO A Ak,ING - �EDIME T SSF— sF \ A \ \V A\ \ 442 \\\ SSSd #4\440 \\� \ \ \ \ \ \ \ \\ \ \ I / i P -7 \ \ \ \ \ O ISTING, APPROVED LIMITS OF \ \ \ \ i N z W 0 i i z 0 i i N i a '• z g 0 j W 1 En :w DISTURBANCE LINE \ \\ \ o I \ \ ^ I I\ W N N N / V ♦A. I I /� \ N tAP 000 444 �— L aas � \ WETLANDS, I IP. .. ° . \ I III / o/ y PSI I IIII � I /L9 P - _ �� I I //� Y I l o I 1 M EXISTING-- U \ /�✓ ° 1 I y y I / / ~ e% DIVERSIONDIKEI I I I I I I I I I I I /J y v y y ch N z — / / co C) W • I I I 1 I— / , 1 II I I v I \ 1 I I cv • I I I I o oC ;E U -- W CD ER _/ e• V A I I I I I I I I I I I I I y', N F; I I I LA S/ _ I I I I I I I I I o N /---364 \ . � , w `.. ICE RINK PARCEL PROPOSED UNDER \ \ \ I I I I I I I I l / l / / / l l' / -- \ I Q / /1 Z SEPARATE SET OF PLANS \ \/� \ W V 1 J \\ I IIII I I I I �I I II lI / / l l /, �� �� \I \ \ • � '_ \ \ I � � ° W ... .. I, \ \ I I I I I I I I I III l l \ \ \\ \ I or W �- T�► \ \ I I I I III M I I I I I/ \\ \• �- 'I \ I Lu \ Ts i J oo APPROVED U ♦ \\ F IP° — _ BACKING oar —� SAW"DER \ STREET\ \ IIZ- GRAPHIC SCALE ( IN FEET) 1 inch = 30 ft. 4 I \ \ I I I I I I I I I I I I I I I I I I I V A\SEDIMENT BASIN #4 \\ \ • T \ \ Q Z \ \ I II II IIIII I 1 \ \ \\\\ \\\ \ \ • \ \ = O W ° \ \ I I IIII I I I \ I \ \ \ \ \ \ \ ♦ \ \ \ \ C) i--i `° \ I I I III III I 1 1 \1 \\ \ \\ \\ \ \ \ • \ C) ra i ME. ■ ■■ W I 1 \ \ \ \ \ \ V A \ \ \ \ V A\ �\ \ V A ♦ \ \ \ V A �, Y I ��• I I I 1 I \ V I \ \ \ \ \\ V A— A V • \\ \ \ A W U LA �►• I I \\ \\ \\\\ \ \ \ \ \ \ \ \ \ \ • \ \ W 075 U) Cn I / // / ?•� 1 \ \ \ \ \\ \ \ \\\ \ \ / \ ° J \ W � I \ W _I O e / / // / j / / / �� J l \ \ \� \ \ \ \ \\\ \\ \� �� ♦♦♦ \ 1 \ \ \ \� � = W LLJ SSF l l / l l / / /� i ■.�� o oC co LLI 1� m 3g0/ yS \ / O /// \ I JOB NO. / O EXIS NG / \� -- / O Yj / / \ 182150 x / / APP ED SUPER ss / _�� — KEY I ( SILT FENCES SCALE T TP EXISTING APPROVED TREE 3 A SHEET NO. CD ` \ \ \ 10 _ FENCING '000- - - --- ` / �SCOTT/R. Ct?Z LLINS/ % // / 30 0 5 GRAPHIC SCALE \ o / / ���� \ — \ \ / / \ — / \ — U Lie. No. 035791 �� PROPOSE \ \� �,. \ � REE PROTECFION \ \ \\ � \ \ — — / �o� 08/04/20ry FENCING A A V A -- --- -- --- tS E C� \� �� IN FEET) \ - �' _ _ - - _ S10NAL 1 inch = 30 ft. A \ —�� I \ _ — - ----- _ PROPOSED NEWLIM\ / \�\\ \ \ UI BA r TS F Lf) E — — — DIS vass\�s assv �-�ss � �� SF \ \ PROPOSED \ \ \ SF WITH WIRE L \ BACKING \ \ \ \ - -� \\ \ \ \ S \\\ \ - \ \ z u4i50 �����■■■��1!(1���\ \ � � \ � � � V A� \) �� � _ _ i� � _ _ _ A \ �� V A A \ VA V �� -�_--- �• � A � Q /i \ \ \ /� \\ / •�� \ \ 55 \ �\ \ N\ y \ \ \ \ \ \ PRQPOSEDFIATVD�TCLASS�+COARS�AGGREGA{E /� cc w i op OUTLET PROTECTION GEOTEXTILEFILTERFABRIC , o V) i \ vv i/� 0 Z. a PROPOSED \\ V A \ \ V� E I MIN. (L�33,-W1I ETER.F BRIC $OOV R PA / UNDEAT END & FABRIC TO BE KEYED INTO}EX. GROU _ z [ 2=1 \\ \ \ \\ \ \\ \ un / \ \ \♦♦�\\ \ PROPOSED SF WITH ` GREENWAY \ \ \ \ \\ \ \ \ \ '\ a \ V �0 \ \ \ �� A \ V A V♦♦� ALIMITS OF sSF WIRE ACKING TYP. DISTURBANCE ) I/— Lu 450 \ \ ♦\ � \ \ — _ ass ass \ \ \ \\ \ �\ \ \ \ F �%� \ ♦ \- _ \ —ass \ \ L ♦ ss — �s ` ass ass\ \ \ \ _ jI / / v v S V A ���� i■T■N� NwAmmm 7■� �■i \ \ \ sue yss� _,ass PROP SED 18" - \ \ s 1 \ \ VE DIVERSI CONTRACTTOR ♦ f+ ++ ■ / \ \ — — \ D SHALL ENS POSITIVE \ •�f f `° ■ \ \ \ SLOPE IS MAINTA D V \ \ \� M S Lu BEM SHALL BE / N■ \ \ E \ \ \ 'STABILRIZED AS R FIIS \ \ \ \ • a N N o n \ \ STEP IN I.STURBANC \ o \ \ \ / N lD OJ 1 \ M I PROPOSED 18" 1 PROPOSED CO TOURS � III \\ I D D DIVERSION. CONTRACTOR Lu SHALL ENSURE POSITIVESLOPE IS MAINTAINED. � V �T- BERM SHALL BE / STABILIZED AS A FIRST \ 1 I 38 \I \ \ STEP IN DISTURBANCE. co / J t - y /� % _ 7 / \ \ \ CONTRACTOR SHALL INSTALL A \ � / / S � - � � — — B — -- \ R WD R/W DIVERSION ACROSS THE o -- � CONSTRUCTION ENTRANCE. -_ CE CON - \ � PROPOSED PAVED \ / / � � W N v \ I I CONSTRUCTION ENTRANCE / __- (12'x70' MIN.) w/ WASH RACK ; ' /� Q & DOWN GRADIENT DIVERSION W J v J I & SEDIMENT TRAPPING DEVICE / - B M / /'\ a I IIII > o 1 \ o \ \ 1 \ \ \ \ I I I \ + BM - w 5 , + - — — - r lie + \ (4 W \ II IIII ; �III�IIIII \I II,I �illll'li IIII (IIII �I IIII I I I I e. II I 1� �a 'D I I I "♦ N ♦♦. LOCATION OF PORTA-POTTIES . „ .LOCATION OF 1 C^' . DUMPSTER N ♦ FUELING AREA T U) F \ ■ ■ PROPOSED \ \ CONTRACTOR PARKING & \ STAGING AREA \ THE FUELING TANK SHALL BE COMPLETELY SURR UNDED BY A 2' DEEP, 2' WIDE EARTHEN BERM WITH HEAVY MIL POLYETHYLENE LINING, OR BE PLACED N AN IMPERVIOUS OPEN -TOP DUMPSTER. THE PROP ED BERM OR DUMPSTER SHALL CONTAIN FUEL IN TH SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACI IS 10% LARGER THAN THE MAXIMUM VOLUME OF S UEL. W o \ \ +++ ++ ++++ �+ ++++ U w ESC / +++++++< + + + + + + + + + ul) w PHASE II +++++++ +++++ �n Z + + + + + + W SEDIMENT _ ++++++ +++/.+ -z O BASIN B ++++ ul 11.27 ac.: — w J O +++ + / + +/ F- W I / - ++ + W / EXIS ING,/A P OVED SEDIMENT TRAP�4C I I i' / ' w U \ / / (DRAPNS T PR POSED SED7WENT�A$IN B} I t) / / - O / // , < 0 i O NLu MATCHLINE, SEE SHEET 9 \ / I PROPOSED PHASE II MASS GRADING CONTOURS PROPOSED STOCKPILE\ SURROUNDED BY SILT FENCE KEY W W x JOB NO. 182150 SCALE 1 "=30' SHEET NO. 11 a U O/ Oo ♦ \ \ I IIII I --- ,� vv00010\ \ l J)I I I I o r SCOTT/R. CiTLLINSZ L.) Lic. No. 035791,a °pow 08/04/20 "A Zo ass -- - — _0- �" vy S v / - yv - MAPPED / / / \ V A / FLOODPLAIN, - - - - / TYP. / - I GRAPHIC SCA E / v , /O - - 30 0 15 30 60 120 . v v v v v v / O ,-- .1'vyv'vy v v v /. � v v v v v S LIMITS OF O / _ / / J / / IN FEET \ \ \ \ z C s STREAM, TYP. O / \ \\\ 1 inch o f \ �� Oo OoO� O O off\ �- \ PROPOSED -FLAT VDOT CLASS +COARAG REG�Xt �� - \ OUTLET PROTECTION t�iEOTEXTIL ILTER�BRIC / / , -\\ --- - -_� -- = - �_ O \ \ �__ \ \ \ \ z J c UNDERLAYMENT FABRIC TO BE KEYED INTO\EX�RQUN - . - -- ��� -- MIN. AT ENDS &ALONG PERIMETER. BRIC700V RLAPA _ — \ O O \ \ H / - -- MIN. OF 9' (L=33, W� W2=15'. =18�M •) �� / �, _ - �� V —�- V A O _ _ �� _ y \ \ \ �/� w _ co V� - \ I - - \ \ \ \ PROPOSED 175.66' -- — PRESERVED \ \ \ \ \ - _ _ — \ \ j I - - - of Ib15" CL. III RCP---- � STEEP SLOPES, � � � � � @ 1.14% W/ VDOT TYP. \\ (� L c -- - \ �/ STD. EW 1 Li u PROPOSED 100' WIDE VDOT CL. AI RIPRAP \ /� \ \ �� \ \ \� \ \ \ \ — LINED EMERGENCY SPILLWAY CREST \\-ELEV.=396.66'. SPILLWAY TO HAVE 4:1 \ / SIDE SLOPES FOR VEHICULAR— \TRANSITIONS.\n\ \ `0 Xl\ --- 10''' WIDE TOP \_ SS S S -js� - « / OF DAM - 1 / / — — — \ jss \ \ \ O f� u �LEV.-398' - -/ �v / / SSV A PROPOSED SUPER v — �SS,SILT FENCE / / I \ �� / �� - �� vys\ �A \ DA=2.35AC. \ _ V A \ Ol950 L FLF/O 25 AC. /1 \ � �� s 40 \\ I ��\\ \�� o C O \ \ \•. \ / 1 I ++ v \ RCED / ++� OPENING) -------- PROPOSEDVDOT SERVE ADS�"ESC RISER FOS STRUCTURE. B M . TO INCLUSWM DEETAIL SHEET TE A E RETE FOROFOU DATION &-TTRASHHRACK SEE -luz OR THE ESC RISER CONVERSION. +++ — - :& VDOTRISER RIM ELESTD. MH-1 DV.T 395AIL F66'-WITH DEWA ERING ORIFICE SPECIFICATIONS. SEE SHEET 13 FOR VDOT STD. B 1 DETAIL / �- 1I I I \ c I� M _+ ++ � �-.AT 392.3 . SEDIMENT BASIN CLEANOUT ELEVATION.=- 390.98 . POSED2' WIDE PROTECTIVE SWM BARRIER - . AROUND THE RISER TO BF�CONSTRUCTED AT THE - + PROPOSED SAFETY FENCE, TIME OF THE RISER STRUCTURE'S CONVERSION 1 INSTALL SIGNS "WARNING TO A PERMANENT SWM RISER. SEE H€ SWM-PLAN QUICK SAND,�CEEP OUT" r FOR SWM BARRIER DETAILS. N3 O I I +++ ■■■■■■■■■■■■■�,� � � I I 1 I I I I I \ 1 1 1 \IIII I + I i �.+++ �� '■� I I V I I I I I I 1 I I I I I I I II �� _ + � . ++++++++++ ++++. r + + + + _ ++++++ + + + + + + + + + + + + +/+ + + + + + + + + + +++ + +y+ ++ _ _ PRO OSEb / I I I \ I 1 I I I I I I I 1\ \ — _ _ — \ \\ \ I I — — / / / / / / / LIMI S OF 1 O I I I I I I \ \ \ / — \ DISTURBANCE I I \ / � ■� I I I --- / / � I IIII II / / �I \�I��I \ 11 \ - //� :IIII IIII IIII -- / / i s R 11"CI \\, II III / / it I I I III IIII I / / 4�_/SIT° NV REF I \ \ o ��� / / / BACK G I I I I I I I I I I I I I —_ _/ / / / / PROPOSED TREE ROTECTION FENCING TO BE INSTALLED O \ \ ALONG/LIMITS CT OPOSED/" DISTU�ZBANCE RI P LINE TO INE/ ■ I I I I I I I I I I - - - / / / / / / i I I MATCHLINE, SEE SHEET 10 KEY v \ IIII II IIIIIIIII I IIII __-- __ — — _ � I_/1111 Il�ll�lll�llg�ll�ll�ll�ll��l�..��.1� ,I �I I I I II IIIIIIIII 1111111 —�� iF�ss_—� _—/� /�no- 1 � 1 z z . w i g O U 1 } 1 z 0 i o Lu Lu i d Ln �g Lu � w Lu 1 c� ti ' ^ M v z N z ® M H� � C) Q N O (�f/ 00 n� w N (/ w > a LLI V) J a J Q J _w° 0 T� L9 z Z U 0 z LLJ 1 � w Y U Lu Lu � Lu ul U) V) o_ J zc�1--j � = w J� � w Lu O � � Q J O QO c)m N U w J r w a 3-) JOB NO. 182150 SCALE 1 11=30' SHEET N0. 12 1992 3.36 TYPICAL ORIENTATION OF TREATMENT - > (SOIL STABILIZATION BLANKET) WGI, l,W ON $BELLOW SLOPES, STRIPS OF NETTING PROTECTIVE COVERINGS MAY BE APPUED ACROSS THE SLOPE. BERM WHERE THERE IS A BERM AT THE TOP OF THE SLOPE• BRING THE MATERIAL DYER THE BERM AND ANCI IF BEHIND THE BERM. 74%�ft BRING MATERIAL DOWN TO A LEVEL AREA BEFORE TERMINATING THE INSTALLATION. TURN THE END UNDER 4- AND STAPLE AT It INTERNALS. ON .STEEP SLOPES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. Source: Adapted from Ludlow Products Brochure II1 - 361 1r IN DITCHES, APPLY PROTECTIVE COVERING PARALLEL TO THE DIRECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AWID .KILNING MATERIAL N THE CENTER OF THE DITCH IF AT ALL POSSIBLE. Plate 3.36-1 Sediment Basin'B' Design MIN. T WI AY 3'WITHOOT HWT CREST EMERGENCY SPILLWAY drainage area (acres) 11.27 basin Volumes: (using 2' contour intervals) DESIGN HIGH WATER (25-WL STORM EIEV.) elevation (ft) contour area (sf) volume(cy) 0& 387 786 0.0 MN 10' -- -- 388 1,387 39.7 Von • STORAGE low CREST DENMTERND 390 3,568 217.0 DEVICE 391 5,310 380.3 WE s oRAGE 392 8,605 635.E 394 13,155 1435.6 Raver SEDIMENT * STORAGE REDUCED (-TOro C.Y./�/AAcREE)) 396 18,066 2587.1 398 23,607 4126.D wet storage: wet storage required Icy) (67'DA) 755 design high water 396.66 dewatering orifice elevation (ft) 392.3D top of dam (ft) 398.00 wet storage provided at this elevation (cy) 755 top width of dam (ft) 10.0 available Volume before cleanout (cy) (34'DA) 383 bottom of basin (ft) 387.0 cleanout elevation (ft) 390.98 approx. bottom dimensions: 72'X27' distance from cleanout to orifice (ft) (> T) 1.3 upstream face slope: 5:1 downstream face slope: 3:1 dry storage: dry storage required (cy) (67'DA) 755 baffles: NO principle spillway crest (ft) 395.66 length of flow, L (ft) 215 dry storage provided at this elevation (cy) 1610 effective width, We (ft) 80.01395 diameter of dewatering orifice (in) 8.D L / We (baffles required If < 2) 2.7 diameter of flexible tubing (in) (orifice+2•) 10-0 collars: YES runoff. depth of water at spillway crest (ft) 9.66 C (use 0.45 for bare earth) 0.45 slope of upstream face (Z:1) 5 tc (min) 5 slope of barrel (Sb) 1.14% 12yr 5.2 Q 2yr 26.4 length of barrel in saturated zone (Ls) 91.09 125yr 7.5 Q 25yr 41.8 number collars required 2 dimension of permanent collars 6.6k6.6' principle spillway: available head (ft) 1.00 emergency spillway: YES diameter riser (in) 45 required capacity (Q25-0p) (cfs) 0.0 spillway capacity, Qp (cfs) 40,D bottom width (ft) 100 diameter trash rack (in) 72 slope of exist channel (%) 1 A% barrel length (ft) 175.66 minimun length of exit channel (ft) 48 head on barrel through embankment (ft) 10.7 crest of spillway (ft) 391 diameter of barrel (in) 15 APPROVED 'WET POND 4' PLAN SCALE 1"=30' 1 APPROVE D�RIPRAP,LINED \\ \ / fNL CH*N< L PROTECTION \ I / APPROVD F(DREA� 1 � \ / / BO�IOM ELEV: 3 0.0'-- \ VA�3En-- \ i / 7 / II I I LAP ROVED POWD bL0 ESET YP EEP BOTTO d PP OV D 1 ' WIDE 1 JF '1 IQ IDE AF B 00 3L.ry A PROVE RA GI GIN BfN ELEVAT ON E N _ 3 6' 36 .20 PER WP 20�1 I � I I 'BC / / / FOAM ED iR _31DEO TOP LAP RN•`N EIN( OIN LE,E°`TA` 0 BI TW EN\ \ \ \ \ \ / / ' 0771•/J / 364.5 &366;R WPO y0170007. % )APPROVED 30' WWIDE RA (.IOEM 7PI APPROVED'STM X-02' DRAINAGE I / STRUCTURE (RIM=372.20, INV IN=362.80, / \ / rr ) ' 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 INV 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) t n o I M O \ - I GHEENWAY,-- - 1 TYP. \A\ d \ `? STR TAM,- TIP. APPROVED 69.11' OF 060" RCP AT 1.59% WITH CONCRETE - CRADLE TO SERVE AS WET POND 4's BARREL (WPO 201700037). APPROVED VDOT STD. ES-1-- UNDER WPO 201700037. / I \ APPROVED 30' LONGCLASS I RIP -RAP OUTLET PROTECTION / UNDER WPO 201700037. B-1. B-2 1 I j1I I J STEPS I(AS REO'D.1 •I Irl r D _I X I_ WEEP HOLE cAS REO'O.7 a LL i PROPOSED LEVEL II 'SEDIMENT BASIN B' DETAIL SCALE 1"=30' I I * o DA Al EAI I IT PROPOSE FLAT VDOT CLASS Al COARSE AGGREGATE OUTL, B �` \ \ \ PROTECIVIO W/GEOTEXTILE FILTER FABRIC UNDERLAYMENT\ \1 FABRICTO BE KEYED INTO EX GROUNDS' MIN. AT ENDS& ` I ALONG PERIMETER. FABRICTO OVERLAIN.) OF 9'(L=3 ' - \ \ � � I W1-4'*W2�15 MIN.) li�.) \ � LIMNS OF STREAM,/TYR. v� I -- OP S I V 10' WIDE TOP OF DAM ELEv 398' A B /IPROPOSED 175.66' 0 15" CIE. . III RC 4.24% W/VDOTSTD. EW-1 PROPOSED 100' WIDE VDOT CL-,AI RIPRAP LINED EMERGENCY SPILL CREST EL V. 396.66'. SPILLWAYT0.HAVE 4:1 SIDE -SLOPES FOR VEHICULAR \ V ATRANSITIONS. .YS� \ \ \\ 61 ' \ \ PROPOSED VDOT STD. B-1 (048" REINFORCED CONCRETE OPENING) TO SERVE AS 048" ESC RISER STRUCTURE. RISER TO INCLUDE A CONCRETE \ * - FOUNDATION & TRASHRACK. SEE SWM DETAIL SHEET FOR FOUNDATION & TRASHRACK SPECIFICATIONS. SEE THIS SHEET FOR VDOT STD. B-1 DETAIL & VDOT STD. MH-1 DETAIL FOR THE ESC RISER CONVERSION. ESC * a 1 RISER RIM ELEV.=395.66' WrTH DEWATERING ORIFICE \ * AT 392.3'. SEDIMENT BASIN CLEANOUT ELEV.= 390.98'. BM x x r NA S PROPO D 2' WIDE PROTECTIVE SWM BARRIER ES, AROUND\THE RISER TO BE CONSTRUCTED AT \ THE TIME OF THE RISER STRU RE'SS \, CONVERSION SWM PLAN FOR S1�1M BARR EANENTM ITRISER S �E THE PROPO D SAFETY FENCE, A INSTALL SIGNS "WARNING A \ \ QUICK SAN KEEP OUT" \ \ \ STEPS (AS REO'D.) WEEP HOLE (AS REIM.) I D _I X I_ B-t 6" At6" - W5.5 K W5.5 WELDED WIRE FABRIC OR EQUIVALENT AREA MONOLITHIC 2" z" _ ' ■ FOOTING LD 4 8"+2X J B-Z DOGHOUSE WITH FOOTING NOTES: 1. SEE GENERAL NOTES FOR ADDITIONAL INFORMATION ON WEEP HOLES. STEP REQUIREMENTS. "H" (LIN. FT. FOR MANHOLES) DIMENSIONS, ETC. 2. ALL BASE UNITS ARE TO BE IN ACCORDANCE WITH THE REQUIREMENTS OF AASHTO M199. 3. CONCRETE SHALL BE 4000 PSI- 4. WHERE OPENINGS ARE REQUIRED FOR PIPE, THEY $HALL BE FORMED, DRILLED. OR NEATLY CUT S. DIMENSIONS SHOWN ARE MINIMUM. ACTUAL DIMENSIONS MAY VARY WITH MANUFACTURER. 6. "D" IS NOMINAL DIAMETER. 7, N THE EVENT THE INVERT OF THE OUTFALL FIRE IS HIGHER THAN THE BOTTOM OF THE STRUCTURE. THE INVERT OF THE STRUCTURE SHALL BE SHAPED WITH CEMENT MORTAR TO PREVENT STRIDING OR PONDING OF WATER IN THE STRUCTURE. B. TON;UE AND GROOVE JOINT ARE TO BE OF FABRICATOR'S DESIGN MEETING VOOT APPROVAL - JOINTS ARE TO BE SEALED WITH MORTAR. O-RING GASKETS. OR BUTYL RUBBER, XVD07 ROAD AND BRIDGE STANDARDS SHEET I OFT REVISION DATE 103.II 08/17 _mow o J' ALTERNATE JOINT DETAIL DIMENSIONS D x MINIMUM Y MINIMUM SUQOESTED MAX. PPE SIZE ABSOLUTE MAXIMUM {,T +k 36" 4" 6" 181 21" 48' S" 6..24' 27" 60 „ 8, 36,. 42N 72" W. a" 48„ 54" 54" V. 60" BIB.. 96" 8" " 72 10811 911 6,i 78'I 84„ 120" t0" all90" 96" 126" TOI 8" 96" 102" ,D8„ 120" li DEPTH "H" OF 36" DIAMETER BASE UNIT RESTRICTED TO 4'-1 MAXIMUM. {T ONE THROUGH PIPE ONLY. (ONE PIPE ENTERING AMC ONE PIPE EXITING STRUCTURE) ILE IN THE CENTRAL OFFICE. SPECFICATION MSE UNITS REFERENCE 105 VIRGINIA DEPARTMENT OF TRANSPORTATION 3302 SEE STANDARAO SL-1 FOR APPLICABILITY OF SAFETY SLABS B STANDARD MI NOTE: FRAME i COVER TFIE TOP OF MASONRY IS TO BE LEFT SLFFICIENTLY LOW TO PERMIT PROPER ADJUSTMENT OF COVER AND FRAMIE TO GRADE BY THE USE OF MORTAR OR BRICK AS DIRECTED BY THE ENGINEER. Q W o o �a h > 16 O THEP THE ENGINE NGINE SECTION WH _ ST-1 6�A '.BEVEL 45• DIAMETER-4'-8"+C2 X WALL THICKNESS) SECTION B-B BRICK CONCRETE OR CONCRETE BLOCK HALF PLAN VIEW MH-1 HALF SECTION A -A (WITH FRAME AND COVER REMOVED) BRICK CONCRETE NOTES- 1.OUANTITES SHOWN ARE FOR MANHOLE WITHOUT PIPES. THE AMOUNT DISPLACED BY PIPES MUST BE DEDUCTED TO TABLE OF QUANTITIES DEPTH BRICK MANHOLE CONCRETE MANHOLE BRICK CONCRETE CONCRETE = EET THOUSANDS CU. YARDS CU. YARDS 4 0.5 0,705 1437 0.755 L699 0.7851.961 I.0 0.785 2.22-! 1.2 0.785 1.4 0.785 IC 1-8 0.705 3.DO3 'T I.9 0.97C 4.455 12 2,2 0.970 3.817 13 2.5 0.970 4.179 14 2.8 0.9704.541 15 3.1 0.970 4.903 '6 3.4 0.970 5.236 17 4.0 1.173 6.037 INGRLMENT 0-45 - ERENCE MANHOLE FOR 12" - 48" PIPE CULVERTS 302 . =G NIA DEPARTMENT OF TRANSPORTAI ION 2016 ROAD a BRIDGE STANDARDS OBTAIN TRUE OUANTITIES. 2.A BASE THICKNESS OF 9" WAS USED IN COMPUTING CONCRETE QUANTITIES. J. INCREMENTS TD BE ADDED FOR EACH ADDITIONAL FOOT OF DEPTH. 4. MATERIALS MAY BE BRICK. CONCRETE OR APPROVED CONCRETE MANHOLE BLOCK. 7. F BLOCKS ARE USED THE MINIMUM THICKNESS OF SAME IS TO BE 5". OTHER THICKNESSES ARE TO CONFORM TO WALL THICKNESS SHOWN FOR CONCRETE. 5.ALL CONCRETE TO BE CLASS A3. T WHEN SPECIFIED ON PLANS THE INVERT 5 TO BE SHAPED N ACCORDANCE WITH STANDARD II THE COST OF FURNISHING AND PLACING ALL MATERIALS INCIDENTAL TO THE SHAPING IS TO BE 14CLLM N THE BO PRICE FOR THE STRUCTURE. ROAD AND BRIDGE STANDARDS REVISION DATE SHEET 1 OF 5 100,01 Lic. No. 035791 06/25/20 ZLn z O a o Z Ln L � I L J , O i1 Ln j w z ( Uj 6fi 1 0 � M , t-•� v Zcyi Nz � C) N O I..L I..L W N W > L J Z;Q� _j w LU o H TI J O z W 1 Z U w LY r WUl U LU 0 J °6 Zw J_ z ULn = O J w ° NN ofw o �;O O I..L ® O N W U w F- � UW F w CI_ Ln JOB NO. 182150 SCALE AS SHOWN SHEET NO. 13 [PRE- AND POST -DEVELOPMENT SUBAREA AND OUTFALL SUMMARIES f 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 (Paint of Interest) (Point of Interest) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection SCOTT I LLINS!z �V 1 v why 1 I �/I��\/�I��IIIIIII�IIIIIIIIII�\IIII\� III\ IIII�I�I\A1III/II\I�I/��lIVIV\1�II\\IIlI1 IIIIII� �II1III�IllII IJII— �III�� �lII1I(lII\I�III\hlI I �I lIII\II�II\I jI �r�III�`III\�l\\III� �IIIl1II\I�\\Il��'� \\IV I�'\�� \I\VII\\\1IA\(I�\ IIll\II1I�I�\I\IIlIII1IIIIlI\I\III�III1�lII�Il��III��IIII 1I\ II IV1IIbIIIIIIII II I�I I III I I I III I IIII' � IIIIIIIIIIIII�IIIIIII III�I II I II � �I I�IA�m,I � ahIm(� I=I�I�-I °, I I�I � II �►QII�I I III II �,I �II/✓ I �� iii III IIIIIIIINI"�II � � I �I��II�I,II1iIIIII=:I4�i,;; 4� �' ,��' III-I��IIqI� I\I�III��IIIIIIIIIII1III�IIIIIIIIIII/IIIII�IIIIlIIICI��IIIIII �III IIIl I�hII ^ I IIIII I AI II\nI I\ \A� \ �I \\A�\ �: I,I\1\� A `I -I \\ �\1 v\\I \�, _Iv� v\\\ I v� \\\\�III �\ wI1 \ I \\ -— J IS�0Q � T N\ &Il TC� _4HSA/5E OI DT/I 4 IN/I E\/ I OSR I /\ N �Sh� = /y / .. I� / � \ I , 1 1 Section 6.3.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 Fl odplain) 0 SpNAL E� ry ED w �iMAPPFL PL UG - ® ,•� V �\ \\ V / 1 �® / / C9 TY�P. O / ®®® ®®®0 �_'\`roosEe m o L�®v= ®�_VA\\1 ��//n_ I\f o ®v- pEL FLOW "� /�/ I,. ��✓ ` W� OF OLF Z LOW �EE�160' OF CONC. Z425' OF C 0 a w o I� I .. • •.••• \ =CDN.�260hV \ l I A ���� �)/�/—�� �_P�—_��_ • ——�A_\ ����I/ I/I/ I /��`I /I IIII I 1 `� / �® I`/� I/ I /l// l\/VA l\\I I I a �88I� \\ `/ / % �/�/�/ /I / /I/� I //I II I Ih //I IS U®j Z lR_PO52Da so �T4Q WSUBAREA B B7REP�E \T7 Co PR0605EDEX\\\ \\ \\\ / / / / / I I \� \ \ \ l I I u o • I %/-�\ // \ / / J I ® THE APPROVED Qp \ \ / // / / /� ^ In m • APPR VED / 11�� /�/ ��II =// // / I ® - 201700037NAM UND \ • ..,� I) �/� •� IIIIIIII /i //l �A\� . sr -a / / .�// � / � � Ce /W FAPPROVED �a NOTE: °DIVERSION WLAN THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE HIS PPROPbSES TREATMENT TOWN CENTER, APPROVED BLOCK 5 &APPROVED SALAMANDER FOR THE FUTURE DEVELOPMENTLn OF THE TOWCENTER. TREET= 35.98 acres. THIS AREA COVERS THE REQUIRED HAUL�� j ROADSBUT EXCLUDES BLOCKS 8A, 8B & 4A SINCE THESE AREAS ECEIVE WATER QUALITY TREATMENT UNDER SEPARATE VSMP o TOWUN CERK5(i.e.THE FUTURE NTEBLOC&SALAMANDER STREET). a IN // kPPR � ITS OF ANMQ N N /� : — I •. A V \� � \ o o IN IN I'' * lI ••• 409' �L(/. 10' / .-�.. ,. c-: I II IV pl I I (I/ �/ /// t_1�k'�•`j ' I� ®® \ : :.I ®®�fa`. \T�1P(\PS\\��\\\\� \\\ \ _��l ..,� // /�//1/ 1 / I ///// /I/I� / 11 ///I II IIII IIIIII II II I I II I IIIII I I I IIII I I I I I (V t0 0IF E,1 950' OF CONIC. EV=o OF CHANNEL FLOW DOWN THE E+YANKMENT w — 11 — PRE-DEV. SUBAREAA a \ I I ll l ��-- , ,\ \ \ _ 1 /� I�il II II �1 IIIII \ \ II 1 \ \ � I W I 16.25 act I I I .I s! \� l l 11 _ A V \ �' I I � � � �� SOUTHERN &WESTERN PERIMETERS— -Efd�60 _ II � � \ � \ / I N I _.ry \ - I}I OF SUBAREAS A &BARE DEFINED Tc=0.41 hrs. w o Eld v� a,l IIII I�I I I I \�\\�\ (, - ®©\ v _ _ / I I I �BYA�OVED WP0201900004. /i r. �.. ® \ ®0 .A�\\� A V / INN u - I z o K0 Q \ • F� \ / I / // \ 04 ` o P4 \ \ \\ V V� \ 4�✓''® ll \\.£ \\� V_ —_��" ° ®vv i �� v v� vv z ooTFALLTo�oii o. ,. LLJ Lu :::.�v Ere \ \\��� ; \� \� \ < :: 1\ \ _� ) ;':Ld fSERV�3TE_E2�� PES, ®/� r 1 LU I —L9 < o L 3° THIS AREA (BLOCK 8B) RECEVES _ ` \ \ \� \ ,n / \ / / / / /�� / /��� L �g STORMWATER QUANTITY,..-- X1 I �` \ \ ��:a / \ \ �_ / �� / / / / \ \./ �— �� —^ _-- W LU I� ° \V QUALITY TREATMENT UNDER\\ V A\ �\ ����//���\/ / > APPROVED WPO ARE PROPOSED NO E ' 9 MODIFICATIONS ARE PROPOSED / / \ _/� LLJ 3° TO THIS AREA & ITS TREATMENT. �� r` A V AV� �- A / / �—� / �p �� 7 /// U1 v) w III I� I� IIIII.. � �� � �- .' �I �, .>✓. �� _ � � s � 378 �� � � � � I cl LLJ PRE -DEVELOPMENT SWM NOTES: O 1211:� 1. APPROVED 'POND 4' PROVIDES SWM TREATMENT FOR BOTH THE TOWN Of o LOG OU / / + o " CENTER (CONCEPTUALLY SHOWN ON THE NEXT SHEET) AND THE APPROVEDMMj Q BLOCK 5 & SALAMANDER STREET SHOWN ON THIS SHEET WPO 201800050). 2. APPROVED 'POND 4' WAS OVER DESIGNED FOR ITS WATERSHED (WHICH p LL INCLUDES BLOCK 5 &SALAMANDER STREET) SO THAT IT COULD ALLOW FOR O FUTURE DEVELOPMENT TO DRAIN TO IT. THIS PLAN SIMPLY CONFIRMS -- s APPROVED 'POND 4' CAN ADEQUATELY HANDLE THE ADDITIONAL FUTURE TOWN CENTER CONCEPTUALLY SHOWN ON THE NEXT SHEET. U° 3. BECAUSE APPROVED 'POND 4'TREATS THE FUTURE TOWN CENTER, BLOCK 5 & SALAMANDER STREET, THERE ARE NO PRE -DEVELOPMENT IMPERVIOUS AREAS w DRAINING TO APPROVED 'POND 4' IN THIS PLAN's PRE -DEVELOPMENT a ANALYSIS. THE IMPERVIOUS AREAS SHOWN ON THIS SHEET DEPICT THE JOB No. APPROVED PLANS, BUT ARE CONSERVATIVELY NOT TABULATED IN THE 182150 0 _ / m _ 7 —/ PRE -DEVELOPMENT ANALYSIS OF SUBAREAS A & B. SUBAREAS A & B WERE \ �l �j / �� ANALYZED WITH A 25% WOODS & 75% GRASS LAND COVER TO REFLECT SCALE PRE -CONSTRUCTION GROUND COVERS. ' 1 120 4. SUBAREAS A & B WERE USED IN THIS PLAN s CHANNEL & FLOOD PROTECTION o SHEET NU. o OI IEVE PLUS READER(LS;1'1) ORIGINALLY APPROVED UNDER ` / j % \\ ANALYSES FOR THE FUTURE TOWN CENTER, APPROVED BLOCK 5 & APPROVED vAN Poza00037DREVISED wtrHYyPazols000l3. / / a SALAMANDER STREET. 14 ®�r ,/ /� / / / I STORMWATER MANAGEMENT NARRATIVE: I/ ( l / I I I OVERVIEW: 'LINS� ®THIS PROJECT IS PART OF THE BROOKHILL DEVELOPMENT, AND STORMWATER TREATMENT IS(po II_-_ - E STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWM R Q REMENTS.OVEMENTS._/ l\'PROVIDED TO MITIGATE THE IMPACTS FROM THE PROJECTS PROPOSED AND FUTURE IMPR 1-�i/�®TH E UI THIS PLAN MEETS TWO PRIMARY OBJECTIVES. THIS PLAN PROPOSES TO PROVIDE STORMWATER OTT - - �\ \ \ _ III QUALITY AND QUANTITY TREATMENT FOR THE FUTURE DEVELOPMENT OF THE TOWN CENTER, AS WELL rRTE,rtrmPORTION OF STELLA aPIDER wao zols000 6E THIS ---� ✓ \\\\ • - _ _ - L - - - NOTE: THIS LAYOUT I FOR MASTER PLANNING OF THE STORMW TE \? ( \ I \ 1 I 1 \ a. No. 035791,E ^ I. o \ 1/ I AS TO PROPOSE THE REMOVAL OF AN APPROVED LEVEL SPREADER (LS-11) THAT HAS NOT BEEN MANAGEMENT FACILITY ONLY. ALL CONSTRUCTION OF RETAINING WALLS OR \\ / / I \ �• PAN IS CURRENTLY UNDER REVIEW AND ��\ - CONSTRUCTED. AT THE TIME OF LS-11's APPROVAL, THE FINAL LAYOUT OF BROOKHILL WAS Q$/04/20LA MODIFICATIONS ARE PROPOSED N �GRADING OPERATIONS WITHIN THIS AREA SHALL MEET THE THE NEWLY r III I UNCERTAIN. HOWEVER NOW THAT IT IS MORE ACCURATELY DEFINED AND THE UPLAND AREAS ARE\\\\\�AoADOPTED GRADING ORDINANCE, AS PART OF 18.4.3.3 OF THE COUNTY ZONING/.THIS AREA & ITS TREATMENT. \��\�� \\\ ROdQsED SwM FAcam - PREDOMINANTLY TREATED WITH MORE RECENTLY APPROVED SWM FACILITIES, ITS NEED HAS'S G� , / _ !• .� \ \ \ - -,_ �\ _ - ORDINANCE/ ' ' ' ) o i / ! & AccccESS EASEMENT DIMINISHED. ALSO, THE INSTALLATION OF A LEVEL SPREADER THAT RECEIVES BYPASSED RUNOFF SIONAL E� �\ \\ \ \ •\ I r FROM A PERENNIAL STREAM IS NOT IDEAL. THIS CONFIGURATION WILL BE DIFFICULT TO INSTALL AND CFMU FLSODPI�rv,�G o _ '� a \\ \1 \ \, \ \ \ \ \ \\\ \ \ ( \ 1 ( \ WILL LIKELY RESULT IN CONTINUED MAINTENANCE CHALLENGES WITH FREQUENT WASHOUTS. _o \ \\ /7YP. WATER QUALITY SUMMARY :.: ...' ®®® ®•® /�\ \ 1 \\ \ \ 1 \\\ \ 1 \ \\\ \ \ 1 IT IS ENVISIONED THAT THE FUTURE TOWN CENTER, WHICH IS CONCEPTUALLY SHOWN ON THIS PLAN, �` 1 WILL GENERATE A RED PHOSPHOROUS REMOVAL RATE OF 29.94 I \ I � \ ■ /�� _��_ - ,fin `_ ®® �... '" \ \ \ \ \ \ \\ \\ \\ \\ MITIGATED S. THE THIS PHOSPHOROUS l oP SED coNCENTRATED �_� �-�� ®®' •:: 1 LOADING WILL BE MITIGATED VIA THREE BEST MANAGEMENT PRACTICES. THE APPROVED POND 4 AND F_ �� =_- -=� Ou�FALL #z To PO[ #z I -' _� -- - _ _ ® --''- ---, \ \\ \ \ \ 1 \ 1 \ \ \ \\�`�� \ I ITS LEVEL SPREADER HAVE BEEN EVALUATED WITH THIS PLAN's CURRENT/CONCEPTUAL TOWN CENTER z 6� �� _ \\ -"' �_�\ ®® \ AND HAVE BEEN CONFIRMED TO BE ADEQUATE. THE APPROVED POND 4 AND ITS LEVEL SPREADER w �� \ \ \ II WILL REMOVE 25.70 Ibs/yr OF PHOSPHOROUS. ALSO, A NEW LEVEL II 'WET POND B' WILL REMOVE AN f ADDITIONAL 8.53 Ibs/yr OF PHOSPHOROUS. THIS WILL GENERATE A PHOSPHOROUS CREDIT OF 4.29 O / r /yr (25.70+8.53-29.94). U F � \� � \�; ®_ e z W J J/) \`\ ADDITION TO THE AFOREMENTIONED FUTURE TOWN CENTER, THIS PLAN REQUIRES ADDITIONAL III I I \ �/ ��� ` ., r \ \" „! � /, PHOSPHOROUS REMOVAL FROM THE ELIMINATION OF THE LEVEL SPREADER, LS 11. PER THE w f 20' OF OLF w/ A ELEV._4... �, / -1 LU 20' OF CHANNEL FLOW DOWN\?,. ///� APPROVED WPO PLANS ANALYZING LS-11, A PHOSPHOROUS DEFICIT OF 2.21 Ibs/yr. IS GENERATED z THE EMBANKMENT I - f �a,\ \f \ 1 ) ' j / /////// 1 FROM THE REMOVAL OF LEVEL SPREADER LS-11. Z Z II I I THIS AREA (BLOCK 48) RECEIVES STORMWATER O J w Z QUANTITY AND QUALITY TREATMENT UNDER \ O \, A, A � / IN TOTAL, THIS PLAN MEETS MINIMUM WATER QUALITY REQUIREMENTS WITH A SURPLUS OF 2.08 Q 0 APPROVED WPO 231800051. NO MODIFICATIONS �/ '� - ��� f -. �., Ibs r PHOSPHOROUS 4.29-2.21 . THIS 2.08 Ibs r PHOSPHOROUS CREDIT WILL BE APPLIED TO O /Y ( ) /Y IIII I I IARE PROP SED TO THIS AREA & ITS-, 'TMENT. THE (Ij FIP\ A rU , , �II / --- s=* BLOCKS 9-11 CURRENTLY UNDER REVIEW (WP0201800086), WHERE ITS BLOCK 11 IS LOCATED Z U I I WATER QUASTORMWALIR QUANTITY TY TREATMENT WILL BE SLIGHTLY - _ A,,� ®� / / �/ _ IMMEDIATELY ADJACENT TO THIS PLAN's WET POND 'B'. m O r4 _ •- • : - - w IMPACTED WITH THE REMOVAL OF LS-11. A� �\ it ® �; / \ r C) U) w M ,WATER QUANTITY SUMMARY \ � THE PROPOSED IMPACTS ASSOCIATED WITH THE FUTURE TOWN CENTER ARE TREATED THROUGH THE p � Q 0 ATTENUATION IN WET PONDS. APPR VED'P ND 4' TREAT SUBAREA AND POND B' TREAT F --0 \\ \\ \0 O S SU 0 S H w a I \ SUBAREA'B'. BOTH SWM FACILITIES HAVE CONCENTRATED OUTFACES, WHICH ESTABLISHES THE > z m j i POINTS OF INTEREST (POI). APPROVED 'POND 4' DRAINS TO POI #1 AND WET POND B' DRAINS TO POI PROPOSED EX Ns d\ \\ \o \\\\\ / #2. CHANNEL PROTECTION COMPLIANCE IS MET FOR POI #1 & POI #2 VIA 9VAC25-870-66, U) z \ \ SUBSECTION B 3 a i.e. THE ENERGY BALANCE CALCULATIONS). FLOOD PROTECTION FOR POI #1 IS U)) 0- THE APPROVED LIMITS OF P ® DISTURBANCE UNDER WPO \ ( ) II I _ I _ III ,_h 't \ e / 0 �•j' z017o00S7, AMErvDM ENr Tz ) 11 1 1 I (i.e. APPROVED POND 4 CONTAINVIA 9VAC25-870-66, S THE 10-YEAR DESIGN ON C.2.a WITH A ISTORM TS OF AAND ASDEQUATELY RELEAIS SET BY SES TIt ON 3.c > Q LU r� % �/ \\ `.,® / \ 1 I I )° I I I I " RUNOFF THROUGH MANMADE PIPES & RIPRAP TO A MAPPED FLOODPLAIN). FLOOD PROTECTION FOR W a w POI #2 IS MET VIA 9VAC25 870 66, SUBSECTION C.2.b (i.e. WET POND B RELEASES A 10 yr NOTE: POST -DEVELOPMENT FLOW LESS THAN THE 10-yr PRE -DEVELOPMENT FLOW). Ii w THE LIMITS OF DISTURBANCE ASSOCIATED WITH THE FUTURE ,,. ,,; , . I •a I ,/ =:, / ® '\ \, I I TOWN CENTER, APPROVED BLOCK 5 & APPROVED SALAMANDER FROM A STORMWATER QUANTITY STANDPOINT, THE REMOVAL OF LEVEL SPREADER LS-11 DOES NOT U) + STREET- 35.98 acres. THIS AREA COVERS THE REQUIRED HAUL / IMPACT ANY OF THE APPROVED WPO PLANS ANALYZING LS-11. CHANNEL AND FLOOD PROTECTION > \ \ ROA DS, BUT EXCLUDES BLOCKS 8A, 8B & 4A SINCE THESE AREAS \ 11 I I I IIII i \ RECEIVE WATER QUALITY TREATMENT UNDER SEPARATE VSMP COMPLIANCE FOR O LA AREAS HAVE ALWAYS BEEN MET SEPARATE FROM THE LEVEL SPREADER IN p0 / �\ PLANS. THIS 35.98 ac. LIMITS OF DISTURBANCE BOUNDARY THE APPROVED WPO PLANS. IN ACCORDANCE WITH THE MOST RECENT APPROVED WPO 201900004's II I III o I I IIIIIIII`I� , \ \\� 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 (i.e. THE FUTURE / B.3.a (i.e. THE ENERGY BALANCE CALCULATION) AND FLOOD PROTECTION IS MET VIA 9VAC25-870-66, f\ IIIII " „,•\•\\\.. ,�, \ ®®\ SALAMANDER STREET). SECTIONS CA & C.3.c (i.e. RUNOFF IS ADEQUATELY CONVEYED THROUGH THE STORM SEWER Y' �' J a \\ ® ® TOWN 5 & \ \ \ 'NETWORK TO A MAPPED FLOODPLAIN). THEREFORE THERE ARE NO PROPOSED STORMWATER QUANTITY M, c ,�+.^ "..:r - _ _ \ \..... ® \ / \ A`PPRO�YED LIMITS bF - - E,� , - _ L / CHANGES, OR ADDITIONAL REQUIREMENTS, ASSOCIATED WITH THE REMOVAL OF LS-11 . 454 / --. J 11 ® TUReANCE UNDF�R WPp� I \ \\ J } N _ J � - \ k\11 E TS ASSO I\\ SUBAREA A I _. • �.,, -..M ®® \ I ® \• 5�700037, AMENDMEN # \ \ / ') I I I I / � �I ,�\J l CD CD CD � � 17.04ac. \\ l I '/ a �o [n v CN=86i,� �, Il ll III i; /I LANDS, III N N 00 \��✓ I I ����.� / / �� � � � � \ $ �, �... Tc 0.10 hrs. .. - � \ �� � .: I l � � � �/ / � ..� III �I� I I �% • � � �. � �v vv v�� � �/ � l IIII /�, I II STRNAI- 1 I I I I << ■ �� y ���-� ':°, IIII I I ,,, I� a > > �`� � � �IIIIIII I/ lr�,�-�� ■ �,��� � � ���.® �������--__ 0. SOUTHERN &WESTERN PERIMETERS \ \\,. • \ I tn®O\\\\\ C) _ OF SUBAREAS A & B ARE DEFINED 1 "� \IIIIn II 1 = \o - BYAPPROVED WPO 201900004. 100 OF OLF w/ A ELEV 22 \ I I II 11 \ I \\ \ \\ ' \ \ ®� \\ \ \ \ /_ `, •_� II I I IIII I I / I I \,, . _..-. / ) __ - 145' OF CHATHE EMBANKMENN Fr � L" I I \\ .... �\ \\\���\\\�/ ''•. x ® \\\ srs \\® � �/ �/ I \i11 I III / / -�` I \ \ • _ll u11111111 1111111111111 \\\\\ �. • \ \ .\ ®�\ �� 1h�11 I I II II I I I / \_ M I�I IIII I� III �w w Wv Z II I 1 \ ' - o\�� �--� IIII'IIvv III ll III, I I v T QUANTITY AND QUALITY TREATMENTORUNDERER - , APPROVED WPO 201800051. NO MODIFICATIONS - 9 \ p _ ARE PROPOSED TO THIS AREA & CTS / ® STORMWATER QUANTITY TREATMENT THE®� I III �\\III I A WATER QUALITY TREATMENT WILL BE SLIGHTLY -- V / I I ���� /- '�� PROPERTY ED WITH THE REMOVAL OF LS-11. & '' III \ \\ ��� N r , IMPACT ,71 LIMITS, TVP. � _ IIIIIh�(II III/ I I /i, vvv` \ I O ACONCEN OUTF*LLYIOIU�� v _ �� - - N z LIJ � �-`v� � w � �\ w II IIII \ \\ n > IIII II l IIII I I \ � A �RVED STEER\ Q 1 \ v�\vim z /d J _ Q > \\\ II I III ■ �� /���/ / / I I j / ////✓�� I \ ) vvv �- v v v " v) III��I VI\V / / /® j/ I V V 111 I I I t �A\ ��\�\ �� V / - - W UI ��\ V\� II 111 VA ■ `' w THIS AREA (BLOCK QUANTITY AND QUALITY TREATMENT UNDER / �� \ APPROVED WPO 20\ \\iV. / \A I I I I /�\ � - �J \ I II \\ A I 0* 0 ARE PROPOSED TO THIS AREA STORMWATER QUANTITY TREATM® �OHE !1/ G WATER QUALIFY TREATMENT WILL BE SLIGHTLY IMPACTED WITH THE REMOVAL \\� \ \� III II I II �\ v i///i �� _/� / • I I I 1 \ \\ �� ///� vv vv / o �o� s v A v� \� V IIII III I � ':�. II V � �432_ / j�/� � i � � i l� '� I 1 A V� V� /" ���/_ �� � / /� / � // � / � � A \ �Z �✓ \ �A ��� ��� �� 426 (BLOCK BB) RECEIVES \ \ 111\\ I 11 �I III\ ll\III\ I �I,III,IIIII � I IIIII IIIII \\\\\ \\\ II 1 IIIII I I III\ IIII I I IIII `IIIII II I II 1 I T IIIII \ 1\\\ Ih IIIII � 1�\III II 1111111� �1 III � h � q I) 1 IIII � IIl�I '; III IIII ��I��I AIL III Ilil ���I�IIII / III I� IIIIU Ilj I� I �I V) II�A��I�I IIIII w IIII '1 I QUANTITY AND W �---w�\ I1 f - 410TREATMENT UNDER �f � : r \\\ \ \\ \ � / / �\�\\ \ /$/ � / / / / �� � \�� �-\ � L W 1' ' 7 \ �� _ Jj .-� APPROVED WPO 201800080. NO MODIFICATIONS ARE PROPOSLn ED -400 Y TO THIS AREA & ITS TREATMENT. �� :ram` \\\\ \ \\� \ ud �// r 3 i w \_ I I Z_ Post -Development Impervious Area Summary W -_ Subarea A 0 Roads & Parking Lots 277,975 sfelf IIII h IIIII1 \ I \ _ ��� ) W/ ` '� ,, •�\ \ ROAD _�j' \ Buildings 163,225 sf J Q O Sidewalks 59,875 sf V,\\\\ 501,075 sf CD \ \ ICD II N m `\ \ \\ \\. \� �� ///• Jj/ \ \� - / / / \ / / / // I II Post Development Impervious Area Summary w \ /%% . Subarea B WATERSHED SUMMARY FOR SUBAREA A Roads &Parking Lots 140,225 sf � Buildings & Pool Area 69,475 sf w Area, 1-year Flow, 2-year Flow, 10-year Flow, o CN ac. cfs cfs cfs Sidewalks 5,975 sf Q 215,675 sf JOB NO APPROVED LS-11 (NOT VET - CON STRUCTED)IS PROPOSED TO BE I/ \ \ REMOVED WITH THIS PLAN. SEE THE / \ SWM NARRATIVE ON THIS SHEET \� FOR ADDITIONAL INFORMATION. \ „- �\ / �i DA A (Pre-Dev.) 60 16.25 2.83 6.07 20.62 DAA(Post-Dev.) 86 17.04 0.34 2.17 54.09 182150 Overall Acreage Summary VRRM Post -Development Impervious Area Summary SCALE 0 --POI-11 � �LEVE PLEADER (LS;a'1) ORIGINALLY APP ED UNDER �-WPO 201700037 D REVISED WITH 0800013 \J / L// WATERSHED SUMMARY FOR SUBAREA B (Boundary defined by this Project's Limits of Disturbance) 1 "-120' CN Area, 1-year Flow, 2-year Flow, 10-year Flow, Roads & Parking Lots 421,925 sf ac. cfs cfs cfs Buildings & Pool Area 239,350 sf SHEET N0. DA B (Pre-Dev.) 60 7.20 1.52 3.32 11.31 Sidewalks 58,725 sf 1r.5 / i 23.45 23.45 DA B (Post-Dev.) 90 6.41 0.20 1.04 11.18 720,000 sf Pre -Development Post -Development Area, ac. Area, ac. DA A 16.25 17.04 DAB 7.20 6.41 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 INSTALLTHE WETLAND SHELF AND AQUATIC BENCH PLANTINGS,AS REQUIRED,AND USE NUTRIENTRICH 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. ALLPLANT MATERIALSHALL MEETTHE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR NURSERY STOCK PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN 1250 STREET NW SUITE 500 WASHINGTON DC 20005. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN. S. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY 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 SUFFICIENTTO CONTAIN THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOT STOCK. 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). ( Q Q 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 FACILITYTO 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: Table 14.4. Clay Liner Specificadons Property Test Method Unit Specification Permeability ASTM D-2434 Cm/sec 1 X 1 Plasticity Index of Clay ASTM D-4231424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clay Particles Passing ASTM D-422 % Not less than 30 Cla Gam coon ASTM D-2216 % 95% of standard procW density Source: Vlrgino iwrmwaler Management HarldD"JlwnI 9. EXCAVATION AND GRADING TO THE APPROPRIATE ELEVATIONS AND DESIRED CONTOURS SHALL BE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OFTHE 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 DE POST CONSTRUCTION BMP CLEARINGHOUSE REQUIREMENTS SET FORTH IN DESIGN Q Q SPECIFICATION NUMBER 14. FACILITY MAINTENANCE: MAINTENANCE OF THE WET PONDS 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: Table 14.6. Typical Wet Pond Maintenance Tasks and Fregvmcy Maintenance Items Frequency • Mowing - twice a year Quarterly or after major storms • Remove debris and blockages (>t inch of rainfall) • Repair undercut, eroded, and bare soil areas • Mowing Twice a year • Shoreline cleanup to remove trash, debris and floatables • Afull maintenance inspection Annually • Open up the riser to access and lest the valves • Repair broken mechanical components, it needed One time during the • Pond buffer and aquatic bench reinforcement Plantings second yearfilbwt wnsWCBan • Foreba Sediment Removal Every 5 to 7 years • Repair riffles, the riser and spillway, 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) S. 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) STORMWATER MANAGEMENT FACILITY GRADING 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 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 Total Facility Elevation Area Contours Volume (ft) (sf) (Cf) 386 433 0 388 1,387 1,730 390 3,568 6,516 391 5,310 10,927 392 8,605 17,818 394 13,155 39,418 396 18,066 70,509 398 23,607 112,059 SECTION 4: TYPICAL DETAILS uAPEF SHF1G%'6TLA;,.O LLEVEL 3 VVETLAN D GPI NF LOW FROM FO REBav OVF7iFLOw MAX N11I-1T FORT IREFEn TO TADLE 14P FOIR VOLUME rREFERTOTABLE REQUIFEMENTu1 drt 142 FOR VOLUME HFE-Y OB'IC REOVREMEMsy ,��tr++�� W-MmIlallfil��1 HIGH ROW LANDSCAPING RE FER TO TABLE 16,2 FOR LI ANO l2 GEIDL►76MENTS> POND AERATICIN FLOW PATH AND POOL 011EM FY OIEFER TO TABLE 14.2 FOR Ll AND Inc BENCH L2 REOURFVZNT% Y EENCH BENCH PL.ANVIEW HUM REFER TOTAaE 14.2 AND DMICIN •uP90 NO. 13 oDNarrkil T_ W1RI MM eEcmda 8 FOR Lt AND L2 VCLUME AND STORAGE DI C 117I IN Vr£TLAND C' r749aFLIDW TO WET POND NORMAL Pam- SAFETY 9ENCH G1Ah4•EL PRO7ECT11V 9ElNG AQUATIC 4 1N 1� � NORMAL POOL � Total Facility Elevation Area Contours Volume (ft) (sf) (Cf) 386 433 0 388 1,387 1,730 390 3,568 6,516 391 5,310 10,927 392 8,605 17,818 394 13,155 39,418 396 18,066 70,509 398 23,607 112,059 SECTION 4: TYPICAL DETAILS uAPEF SHF1G%'6TLA;,.O LLEVEL 3 VVETLAN D GPI NF LOW FROM FO REBav OVF7iFLOw MAX N11I-1T FORT IREFEn TO TADLE 14P FOIR VOLUME rREFERTOTABLE REQUIFEMENTu1 drt 142 FOR VOLUME HFE-Y OB'IC REOVREMEMsy ,��tr++�� W-MmIlallfil��1 HIGH ROW LANDSCAPING RE FER TO TABLE 16,2 FOR LI ANO l2 GEIDL►76MENTS> POND AERATICIN FLOW PATH AND POOL 011EM FY OIEFER TO TABLE 14.2 FOR Ll AND Inc BENCH L2 REOURFVZNT% Y EENCH BENCH PL.ANVIEW HUM REFER TOTAaE 14.2 AND DMICIN •uP90 NO. 13 oDNarrkil T_ W1RI MM eEcmda 8 FOR Lt AND L2 VCLUME AND STORAGE DI C 117I IN Vr£TLAND C' r749aFLIDW TO WET POND NORMAL Pam- SAFETY 9ENCH G1Ah4•EL PRO7ECT11V 9ElNG AQUATIC 4 1N 1� � NORMAL POOL � SECTION 4: TYPICAL DETAILS uAPEF SHF1G%'6TLA;,.O LLEVEL 3 VVETLAN D GPI NF LOW FROM FO REBav OVF7iFLOw MAX N11I-1T FORT IREFEn TO TADLE 14P FOIR VOLUME rREFERTOTABLE REQUIFEMENTu1 drt 142 FOR VOLUME HFE-Y OB'IC REOVREMEMsy ,��tr++�� W-MmIlallfil��1 HIGH ROW LANDSCAPING RE FER TO TABLE 16,2 FOR LI ANO l2 GEIDL►76MENTS> POND AERATICIN FLOW PATH AND POOL 011EM FY OIEFER TO TABLE 14.2 FOR Ll AND Inc BENCH L2 REOURFVZNT% Y EENCH BENCH PL.ANVIEW HUM REFER TOTAaE 14.2 AND DMICIN •uP90 NO. 13 oDNarrkil T_ W1RI MM eEcmda 8 FOR Lt AND L2 VCLUME AND STORAGE DI C 117I IN Vr£TLAND C' r749aFLIDW TO WET POND NORMAL Pam- SAFETY 9ENCH G1Ah4•EL PRO7ECT11V 9ElNG AQUATIC 4 1N 1� � NORMAL POOL � F P R._.H_Lr .OW LOW7OTIC E : 4 .,. .al.- ZIE'VERSEOW SLOPE LOW FLOW PROFILE tWITH UPPER SHELF WIETLANDt SPFE TY BENL'H AQUATIC RENC:H OHA1Jra1 PROTEQTION NOFPAPLPOOL� HIGH FLOW TO WET POND �1F NIFOfua.�IAILIF POOL I t1Il `-tIIllI, Ii eIliItI=='Efqlln-=l11uS11l11,-1i111'--'II-- 111,-- _1�`�-'��_- _. ram LOW T FIRE NOTE REFER TO SECTRON 6 FUR L I AND L2 N10RMAL POOL VOLUME MID �_ ANDN Alm CHANNR PROTECTION GTCRAOE DEPTHS PROFILE (WITHOUT UPPER SHELF WETLAND) Figure 14.1. Wet Pond Oesi n Schematics 9 9 e i '2" >.inc Plated 'nook � a to h fastener (� t c ed with .3/ " R ael s (D ®® ®®� ­1 B" din. hnle- (Do ®® s qq�� Isometric I/4' HOPE Plato (optional) Pipe culvert Y HDPF. •Lruclurwl plssaio with 0 2-1/61- holes and 114" plate O/"1 manufeclured by Plealic V 3olLNnns IOC or equal 000 0000 shows Titb optram] plate HDPF struol.ursl pinatic with 2-1/8" holes and 1/4- plate SecLiorl manufactured by Plastic Solutions Inc or cquol 9 8' di. halo 0 0 0 0 0 00 0 0 single B]IP ri'i. Elevilt1011 u PLASTIC SOLUTIONS P.1. Box 4300 DEBRIS CAGE Ninctester VL UN4 INC. 877-877-5-727 m pledie-=dr.:a eam 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' \ \ \ \ \ \ \ \ \ \ \ Treatment Volume, Tv (VRRM) 18,130 cf Minimum Treatment Volume Required for Level 11 Basin 27,195 cf Treatment Volume Provided at MWSE 17,818818 cf Minimum Percentage of TV Provided at MWSE 50 Percentage of Tv Provided at MWSE 66 % REENWAY. Ponding Depth Corresponding to Minimum Tv Required 0.9 ft T\YP PR SER D S1EP SLpP\ yP\ \Maximum Ponding Depth allowed for Minimum Tv 4 ft `` \ \ \ \ Maximum Percentage of Tv Provided above MWSE 50 % \ \ \ Percentage of Tv Provided above MWSE 34 % 1 I \ Minimum Forebay Volume Required (15% of Tv) 4,079 cf LO TI N dF F TUR /PIPE /0UTFALL. TO S WE DEIGN �TO BE PART OF / \ ` \ \ Forebay Volume Provided 7,130 cf N EN ER's FINAL ITE PLAN. \ I \ Minimum Upper Wetland Shelf Area 10%of Pond Area 861 sf ' \ I 1 PP ( ) %/ / / / \ \ 0+00 Upper Wetland Shelf Provided 882 sf v PROPOSED g4g3'8F I PROPOSED FLAT VDOT CLASS At COARSE � / \ 015" CL III RCP Qya ,.a4w / AGGREGATE OUTLET PROTECTION w/ VD OT DOT STD. EW 1 / � GEOTEXTILE FILTER FABRIC UNDERLAYMENT. Q / FABRIC TO BE KEYED INTO Ex. GROUND 9" 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 ATOP ELEVATION OF 392.0' WITH A 15' / \/ / / /27 F REBAY WIDE WEIR (CREST ELEV.=391.0 ). $!y / / CELL �i\ / \ \� 1 <` -SEE THJ� SHEET FOFZ- S�ALED\ \ \ WEIR TO CONVEY FLOWS FROM i \ �� X '' PROFIT S OF THE ALIGNM LNE0 (TYP.) FOREBAY CELL TO WETLANDS CELL. / / i \ \ \ Ry i� , -- �,_ //OPO D2oo' WIDEVDOT �� ECIL.M RRIPR LINED i 3 \ >/'�,` _ �,EMERGENCYS LLWAY CREST SHORTEST FLOW PATH (13z') / / \ F ELEV:=396.7;'. SPILL Y TO OVERALL LENGTH (138')> 0.8 / O. / -- \ �. \� � HAVE 4:kS DE SLOPE \� ' \''", - VEHICULARTRpNSITIONS. \'F PC / \�`..�, io'WIDE TOPCF\ '� DAM�ELEV.=398' FLOW PATH >3:1 � \ \ z /(FLOW LENGTH-igS'/WIDTH-64') \ \ MAIN \ o \ \ \3\ \\ O C -_---- -1 +16 INTERNAL BERM LOCATED BETWEEN THE \ WETLAND CELL & MAIN CELL TO HAVE A TOP \ \ 35 VA/ ELEVATION 392.0' WITH A 15' WIDE WEIR (CREST EL ELEV.=391.0'). WEIR TO CONVEY \ \ / FLOWS FROM WETLANDS CELL TO MAIN CELL. \ J \ 12' WADE ACCESS ROADT0 RISER R \ENTIAL�IAINTENANC �l� AQUATIC BENCH \ \ I F 5F s \ \ \ \ / PRORQSEDVARIAB WIDTH SWM • \ \ & ACCESS Ei !EMENT, TYP. CONTRACTOR SHALL USE \ NUTRIENT RICH TOPSOIL FOR THE \ AQUATIC BENCH & SHALL ENSURE HEALTHY GROWTH OF PLANTINGS \ ( \ DURING THE FIRST YEAR (TYPJ PROPOSED�- \MWSE=392' _. \ MANAG PROPOSED VDOT STD. B-i (048" 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 2'WIDE PROTECTIVE BARRIERAROUND THE RISER TO BE \ VDOT STD. MHa WITHOUTTHE FRAME & COVER INSTALLATION. WITH CONSTRUCTED OF GABION BASKETS FILLED WITH STONE. \ \ THE FRAME & COVER, THE IV s RISER OPENING IS 24" IN DIAMETER. DIVERSION TOP TO EXTEND i' ABOVE THE MWSE. STONE FILLED \ \ RISER TOP TO INCLUDE ATRASHRACK, 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 OFADEQUATE ANCHORING. SEE GENERAL SWM NOTE LOW -FLOW ORIFICE (INV.=392.00) AND (4) FOUR 06" MID -FLOW #5 ON THIS SHEET. \ ORIFICES I NV. 395.00). \ .r \ AQUATIC BENCH (ZONE 1) PLANTING SCHEDULE FOR SWM FACILITY \ SYM BOTANICAL COMMON NAME SZE SWM FACILITY QUANTITY COVERAGE (sf) ZONE 1 PLANTINGS EC PONTEDERIAPECTINATUS PONDWEED 650 VA VALISNERIAAMERICANA WILD CELERY 650 EC ELODEACANADENSIS WATERWEED 575 415 \ A 415 PROPOSED VDOT STD. B-1 " 0 8REINFORCED CONCRETE MH BASE TO ( 4 ) SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-i WITHOUTTHE FRAME & COVER INSTALLATION. WITH THE 1XISTING FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. RISER GRADE TOP TO INCLUDE ATRASHRACK SEE DETAIL ON THE NEXT SHEET. RISER 410 RIM ELEV.=395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE / (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). \ ROPOS D 2'WIDE PROTECTIVE BAR IER AROUND INTERNAL BERM LOCATED BETWEEN THE HE RISER TO BE C NSTRU TED OF GABION BASKETS WETLAND CELL &MAIN CELL TO HAVE A TOP P TO EXTEND i ELEVATION OF 397.0' WITH A 15' WIDE WEIR NBOVETRIEMWSE STONE TILLEDGABION BA KETS (CREST ELEV.=39140'). WEIR TO CONVEY FLOWS �\ O EXTEND BELO GRADE, O THE RISER BAS OR TO POINT FADEQ ATE AN HORING.SEE GEN R FROMWETLANDS CELL TO MAIN CELL. Ak05 AN INTERNAL BERM LOCATED BETWEEN THE \ / -CONTRACTOR HALL STALL FOREB/CY AND WETLAND CELL TO HAVE A TOP DANCE ELEVATION OF 392.0' WITH A 15' WIDE WEIR - \ w/ TIFF DESIG SHOW ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS ROPOS D THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. GRADE 400 -2o'WIDI TOP OF \\ DAM ELI iV.=398.0' 395 k \ 395 � - 7 cow v o i f Z _ G) - - RQPQ M SE=3920' A 390 io' WIDE, 16' DEE Co 390 kK WSE 397.00 Qz \ \ \K WSE 396.27 \K WSE 395.27 0: INV= kK WEE 394.93 386.00 PROPOSED 94-33' OF Oi5" CL. ERMAN NT POO III RCP ,% DEPTH=(FLOOR 11 \ 385 PROPOSED 6' DEEP FOREBAY ELEV. 86.o') '� �� (FLOOR ELEV.=386')TO PROVIDE I,ROPOSE3VDOT PRETREATMENT UPLAND OF MAIN T PREVENTFLOAT TION ERISER BASE \ STD. W- CELL & WETLAND CELL. FOREBAY ND BARREL CON ECTIO SHALL BE HELPS FURTHER REDUCE THE RISK N OF CLOGGING IN THE LOW -FLOW 'Lx8'Wx 8"D REINFORCE CONCRETE ORIFICE. SEE GENERAL SWM NOTE FOUNDATION. THE CONC. FOUNDATION INV= #5 ON THIS SHEET. 382.00 380 SHALL BE BURIEM BELOW GROUND. JJ O O N O O CV ^ O PROPOSED RIPRAP TO EXTENDTO WW r O I) * lt� O O STREAM BANKS, AS SHOWN. O 00 O 00 O O O O O O O M 0) N CONTRACTOR SHALL NOT DISTURB W 0) r 00 00 M r7 0)j THE STREAM AND WETLANDS 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 ATHIRD 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 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 Zoo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 30'Y 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', l W2=15', D=18" MIN.) PROFILE SCALES 1"=5' (V) 1"=50'(H) 410 410 WIDE VDOT CL. Al ZONE 1 PLANTINGS EC PONTEDERIAPECTINATUS PONDWEED 650 VA VALISNERIAAMERICANA WILD CELERY 650 EC ELODEACANADENSIS WATERWEED 575 415 \ A 415 PROPOSED VDOT STD. B-1 " 0 8REINFORCED CONCRETE MH BASE TO ( 4 ) SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-i WITHOUTTHE FRAME & COVER INSTALLATION. WITH THE 1XISTING FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. RISER GRADE TOP TO INCLUDE ATRASHRACK SEE DETAIL ON THE NEXT SHEET. RISER 410 RIM ELEV.=395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE / (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). \ ROPOS D 2'WIDE PROTECTIVE BAR IER AROUND INTERNAL BERM LOCATED BETWEEN THE HE RISER TO BE C NSTRU TED OF GABION BASKETS WETLAND CELL &MAIN CELL TO HAVE A TOP P TO EXTEND i ELEVATION OF 397.0' WITH A 15' WIDE WEIR NBOVETRIEMWSE STONE TILLEDGABION BA KETS (CREST ELEV.=39140'). WEIR TO CONVEY FLOWS �\ O EXTEND BELO GRADE, O THE RISER BAS OR TO POINT FADEQ ATE AN HORING.SEE GEN R FROMWETLANDS CELL TO MAIN CELL. Ak05 AN INTERNAL BERM LOCATED BETWEEN THE \ / -CONTRACTOR HALL STALL FOREB/CY AND WETLAND CELL TO HAVE A TOP DANCE ELEVATION OF 392.0' WITH A 15' WIDE WEIR - \ w/ TIFF DESIG SHOW ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS ROPOS D THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. GRADE 400 -2o'WIDI TOP OF \\ DAM ELI iV.=398.0' 395 k \ 395 � - 7 cow v o i f Z _ G) - - RQPQ M SE=3920' A 390 io' WIDE, 16' DEE Co 390 kK WSE 397.00 Qz \ \ \K WSE 396.27 \K WSE 395.27 0: INV= kK WEE 394.93 386.00 PROPOSED 94-33' OF Oi5" CL. ERMAN NT POO III RCP ,% DEPTH=(FLOOR 11 \ 385 PROPOSED 6' DEEP FOREBAY ELEV. 86.o') '� �� (FLOOR ELEV.=386')TO PROVIDE I,ROPOSE3VDOT PRETREATMENT UPLAND OF MAIN T PREVENTFLOAT TION ERISER BASE \ STD. W- CELL & WETLAND CELL. FOREBAY ND BARREL CON ECTIO SHALL BE HELPS FURTHER REDUCE THE RISK N OF CLOGGING IN THE LOW -FLOW 'Lx8'Wx 8"D REINFORCE CONCRETE ORIFICE. SEE GENERAL SWM NOTE FOUNDATION. THE CONC. FOUNDATION INV= #5 ON THIS SHEET. 382.00 380 SHALL BE BURIEM BELOW GROUND. JJ O O N O O CV ^ O PROPOSED RIPRAP TO EXTENDTO WW r O I) * lt� O O STREAM BANKS, AS SHOWN. O 00 O 00 O O O O O O O M 0) N CONTRACTOR SHALL NOT DISTURB W 0) r 00 00 M r7 0)j THE STREAM AND WETLANDS 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 ATHIRD 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 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 Zoo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 30'Y 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', l W2=15', D=18" MIN.) PROFILE SCALES 1"=5' (V) 1"=50'(H) 410 410 WIDE VDOT CL. Al 415 \ A 415 PROPOSED VDOT STD. B-1 " 0 8REINFORCED CONCRETE MH BASE TO ( 4 ) SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-i WITHOUTTHE FRAME & COVER INSTALLATION. WITH THE 1XISTING FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. RISER GRADE TOP TO INCLUDE ATRASHRACK SEE DETAIL ON THE NEXT SHEET. RISER 410 RIM ELEV.=395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE / (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). \ ROPOS D 2'WIDE PROTECTIVE BAR IER AROUND INTERNAL BERM LOCATED BETWEEN THE HE RISER TO BE C NSTRU TED OF GABION BASKETS WETLAND CELL &MAIN CELL TO HAVE A TOP P TO EXTEND i ELEVATION OF 397.0' WITH A 15' WIDE WEIR NBOVETRIEMWSE STONE TILLEDGABION BA KETS (CREST ELEV.=39140'). WEIR TO CONVEY FLOWS �\ O EXTEND BELO GRADE, O THE RISER BAS OR TO POINT FADEQ ATE AN HORING.SEE GEN R FROMWETLANDS CELL TO MAIN CELL. Ak05 AN INTERNAL BERM LOCATED BETWEEN THE \ / -CONTRACTOR HALL STALL FOREB/CY AND WETLAND CELL TO HAVE A TOP DANCE ELEVATION OF 392.0' WITH A 15' WIDE WEIR - \ w/ TIFF DESIG SHOW ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS ROPOS D THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. GRADE 400 -2o'WIDI TOP OF \\ DAM ELI iV.=398.0' 395 k \ 395 � - 7 cow v o i f Z _ G) - - RQPQ M SE=3920' A 390 io' WIDE, 16' DEE Co 390 kK WSE 397.00 Qz \ \ \K WSE 396.27 \K WSE 395.27 0: INV= kK WEE 394.93 386.00 PROPOSED 94-33' OF Oi5" CL. ERMAN NT POO III RCP ,% DEPTH=(FLOOR 11 \ 385 PROPOSED 6' DEEP FOREBAY ELEV. 86.o') '� �� (FLOOR ELEV.=386')TO PROVIDE I,ROPOSE3VDOT PRETREATMENT UPLAND OF MAIN T PREVENTFLOAT TION ERISER BASE \ STD. W- CELL & WETLAND CELL. FOREBAY ND BARREL CON ECTIO SHALL BE HELPS FURTHER REDUCE THE RISK N OF CLOGGING IN THE LOW -FLOW 'Lx8'Wx 8"D REINFORCE CONCRETE ORIFICE. SEE GENERAL SWM NOTE FOUNDATION. THE CONC. FOUNDATION INV= #5 ON THIS SHEET. 382.00 380 SHALL BE BURIEM BELOW GROUND. JJ O O N O O CV ^ O PROPOSED RIPRAP TO EXTENDTO WW r O I) * lt� O O STREAM BANKS, AS SHOWN. O 00 O 00 O O O O O O O M 0) N CONTRACTOR SHALL NOT DISTURB W 0) r 00 00 M r7 0)j THE STREAM AND WETLANDS 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 ATHIRD 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 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 Zoo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 30'Y 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', l W2=15', D=18" MIN.) PROFILE SCALES 1"=5' (V) 1"=50'(H) 410 410 WIDE VDOT CL. Al 415 PROPOSED VDOT STD. B-1 " 0 8REINFORCED CONCRETE MH BASE TO ( 4 ) SERVE AS THE ESC RISER. CONTRACTOR SHALL CONVERT THE ESC RISER TO A PERMANENT SWM RISER. PERMANENT SWM RISER TO BE A VDOT STD. MH-i WITHOUTTHE FRAME & COVER INSTALLATION. WITH THE 1XISTING FRAME & COVER, THE MH-i's RISER OPENING IS 24" IN DIAMETER. RISER GRADE TOP TO INCLUDE ATRASHRACK SEE DETAIL ON THE NEXT SHEET. RISER 410 RIM ELEV.=395-75'. RISER TO INCLUDE (i) ONE 02.33" LOW -FLOW ORIFICE / (INV.=392.00) AND (4) FOUR 06" MID -FLOW ORIFICES (INV. 395.00). \ ROPOS D 2'WIDE PROTECTIVE BAR IER AROUND INTERNAL BERM LOCATED BETWEEN THE HE RISER TO BE C NSTRU TED OF GABION BASKETS WETLAND CELL &MAIN CELL TO HAVE A TOP P TO EXTEND i ELEVATION OF 397.0' WITH A 15' WIDE WEIR NBOVETRIEMWSE STONE TILLEDGABION BA KETS (CREST ELEV.=39140'). WEIR TO CONVEY FLOWS �\ O EXTEND BELO GRADE, O THE RISER BAS OR TO POINT FADEQ ATE AN HORING.SEE GEN R FROMWETLANDS CELL TO MAIN CELL. Ak05 AN INTERNAL BERM LOCATED BETWEEN THE \ / -CONTRACTOR HALL STALL FOREB/CY AND WETLAND CELL TO HAVE A TOP DANCE ELEVATION OF 392.0' WITH A 15' WIDE WEIR - \ w/ TIFF DESIG SHOW ON (CREST ELEV.=391.0'). WEIR TO CONVEY FLOWS ROPOS D THESE PLANS. FROM FOREBAY CELL TO WETLANDS CELL. GRADE 400 -2o'WIDI TOP OF \\ DAM ELI iV.=398.0' 395 k \ 395 � - 7 cow v o i f Z _ G) - - RQPQ M SE=3920' A 390 io' WIDE, 16' DEE Co 390 kK WSE 397.00 Qz \ \ \K WSE 396.27 \K WSE 395.27 0: INV= kK WEE 394.93 386.00 PROPOSED 94-33' OF Oi5" CL. ERMAN NT POO III RCP ,% DEPTH=(FLOOR 11 \ 385 PROPOSED 6' DEEP FOREBAY ELEV. 86.o') '� �� (FLOOR ELEV.=386')TO PROVIDE I,ROPOSE3VDOT PRETREATMENT UPLAND OF MAIN T PREVENTFLOAT TION ERISER BASE \ STD. W- CELL & WETLAND CELL. FOREBAY ND BARREL CON ECTIO SHALL BE HELPS FURTHER REDUCE THE RISK N OF CLOGGING IN THE LOW -FLOW 'Lx8'Wx 8"D REINFORCE CONCRETE ORIFICE. SEE GENERAL SWM NOTE FOUNDATION. THE CONC. FOUNDATION INV= #5 ON THIS SHEET. 382.00 380 SHALL BE BURIEM BELOW GROUND. JJ O O N O O CV ^ O PROPOSED RIPRAP TO EXTENDTO WW r O I) * lt� O O STREAM BANKS, AS SHOWN. O 00 O 00 O O O O O O O M 0) N CONTRACTOR SHALL NOT DISTURB W 0) r 00 00 M r7 0)j THE STREAM AND WETLANDS 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 ATHIRD 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 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 Zoo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 30'Y 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', l W2=15', D=18" MIN.) PROFILE SCALES 1"=5' (V) 1"=50'(H) 410 410 WIDE VDOT CL. Al 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 ATHIRD 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 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 Zoo' RIPRAP L SPILLWAY CR SPILLWAY TO HAV FOR VEHICUL 30'Y 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', l W2=15', D=18" MIN.) PROFILE SCALES 1"=5' (V) 1"=50'(H) 410 410 WIDE VDOT CL. Al NED EMERGENCY EST ELEV.=396.75. - 4:1 SIDE SLOPES AR TRANSITIONS. 405 TIDE TOP =DAM V.=398 40 400 XISTIN GRADE l d 100' 395 395 d .TER C TO BE RO OSE v. AT GRADE IRIC TO ul=a', 390 390 W J 0 O O n In W W 0) .cc b0 0) rD 0) t0 CD C9 r7 O) i.r) t7 O t7 tr t7 W I.L. 0+50 1+00 1+25 WET POND B SPILLWAY SCOTT/R. C15-LLINS2_ Lic. No. 035791,a 06/25/20 �v4J Ln z w 0 O U Z z O C, 0 Z O_ J Go =I < J I Q O N U) F Z i w � N I I I W C CD CD Q N N 0 N t\O oum W W Z 0 z u U1 z J J 0_1 �A m 1 _ r n U M C CY) V M `w z > v N r� ° co II� o L 3 N m o 1 0 N cl. > O L..L 0 o N V 0 w m 73 (n V / LU o J l!1 a Q J s J _ Q C > o rr^^ VJ 5 LLI LLJ o I"' in I"' I `o O N J z ° � W s 3 v 2 O W U U �rr�1 0 1 � a Y U z Q 0 UJ I ° BUJ o �V W ° c 0 J Q z o' LLI J> w w C Z w r T LL z y 0 J W ~ o ou/ O -0LL 0 IY N �o ❑ o �l1•���LL o V � N V C)CN w J F F L H- w Y= 3_ cn JOB NO. 182150 SCALE AS SHOWN SHEET NO. 16 w J F F L H- w Y= 3_ cn JOB NO. 182150 SCALE AS SHOWN SHEET NO. 16 AIR FLO 3 DIFFUSED AERATION SYSTEM SPECIFICATIONS h f r manufacturer hall PURPOSE. The diffused air.s provide an underwater aeration system designed to aerate, de stratify, and circulate water without disturbing the natural surroundings of the lake environment. SCOPE: The diffused air, aeration package shall be capable of being installed in lakes deeper than 3ft (I m). PACKAGE: This aeration ,package shall include the following equipment a. Air compressor cabinet enclosure. To Include disconnect, an ai tom essor s circuit d sco nett d r flow balancing valve manifolds - To be designed to operate on either: I. 6OHz power, 115/208/230 volt, single phase ill SOHz pourer, 220/240 volt, single phase b. Air/Oxygen disc diffuser manifolds c. Tubing a r , r a. --.altl(ll.ailr�•lai• a v't.. , 1 i,vw one-bine com'alrilo3 C:CAO1ct�l1! CABINET/ENCLOSURE TUBING: JAvuilolik in IDo/t (301 incrementil O 1 Compressor Total required tubing for system: Q 2 Compressor feet (_ m) Non -weighted polyvinyl chloride tubing SPECIFY: 175 Votts 60 Hz ---__ feet ( m) Weighted polyethylene chloride tubing DIFFUSER MANIFOLD(S):IstnBle or Dual Disc) Tubing lengths per diffuser manifold - Quantity Type -- --_ �- �- �_ Single Disc Manifold(s) v Q feet 00 meters) Non -weighted tubing Dual Disc Manifold(s) v- 0 feet (Q meters) Weighted tubing PISTON AIR COMPRESSOR: (for lakes 311 (1 m) deep or larger) The air compressorts) shall be a 1/2HP rocking piston, dual frequency, permanent split capacitor (psc) electric motor with oilless lubrication, direct drive (no belts or pulleys), designed for field service capability, polyurethane rust protection, and to Include the following motor protection thermal overload protection[ and Intake air filter. The serviceable parts: piston cups, retainer screws, cylinder o-rings, head o-rings, valve and valve retainers; should last two years in continuous operation. These maintenance parts shall be replaceable with common tools. Please consult your local distributor if you require assistant in choosing sizes, accessories, or applications. AIR COMPRESSOR CABINET ENCLOSURE: a. Cabinet body and cover construction shall be 18 gauge (0.048in/0.122cm) 304 stainless steel, and include EPDM edge-gnp seal b. Cabinet cooling system to consist of two (2) axial exhaust fans and vented Intake louvers on the bottom of the cabinet to provide an air exchange rate of 410.490 CFM c. Compressor -intake air to be quick change cartridge type filters d. Cabinet enclosure secured by stainless steel latch to accomodate hiking mechanism Air Flo 7 Ditruud Air Svstern SpecdK3uorls 1 Page I or 2 AF3-242; FIN 03-3242 OR APPROVED EQUAL • c--Q AIR FLO 3 ' DIFFUSED AERATION D No electrical parts in water, safe for recreational us,, - k ; - " k, �•� �'' "' • Lxtremely energ) el fident and cost effective. F l_Iin4350mm) discs are coated to prolide non•sticl. •` �f surface and offer higher efficiencies throughout = c.ww•a coma l Us" altlruirw lifegile. - Operating depths up to •Wft+ or 12an+. PRODUCT ILLUSTRATIONS 2 )Y'ar all- Inclusive warrant)'• A, 119 1 pnwN M %Wsos mD[skkm 112W Is lest IftiN.1 "Loss, woop a.ma alPr.r M gw,aaq a.IMq W - .a4Rb 12•, Complete package includes cabinet l,tthcoinpressot(s). s All [w[ggW..0so"..[.ela[•nsagIalso filter and vahe manifold,; and diffuser manirold(s). 12a't"vaso reouk "''•"a"a olN.n nv.dud I[w 1. avnwY,aeell ApAa[nw, DMr•P•,N< D411a „•d m W W^ batar ~I h b - Safety tested and listed with EM & III C, conforming - I• I cn.nq-1 bass a..•n/ MMtlI•nnn to UL standards; and carries a 3rd part)' listing with CF.. - Fwn "n'a 9~ i°e [ao 1w 41mn,m[ •wa1[n. Nu•q•[ P[Ny r ...1..d „1r.lAM wnNnp ♦ cal pat/ r L�': - I p ;t 409 M. INaI.. ia0m IaDlit al for a1 Tom R, ,5 System a Dof*W PA" �bn. IfMa2l�tr ltlm xll[-[12[1p LMpm,agM ask food aahagq � 411- IL ! 7 - Cin. rmhq µ[two m4,bt n/I uld ions Nw, mnn W Art• W ! I 1 Q arowN caged bw.r. an ®veu trvea a...[b.a a IIV4.?Ai! 1 sit raw of 225 awns gq.Mule "1-941 1 4 a 71Wr.12!! Vaw aYM,ial Mxaua..tlr [abwel M•]. br N[.. Ara lit 1 = T71V7.US! dpal,l•m YIIUf1IM Fb 3tys1eln. AFr l72 ! 7 t e macaw a sole. w[wd bt awnless Red Mrch m" - w'Yow1•gaanabctlayaw[WNsn- Y3 N1 4 AF7•aFl 4 1 - a I Cug[nr[raAar,. what".,ad,aWvbr.�ahWJ.N lit J Td MC_INWuO,No IIN i.gwu, Lha•10'. Ilia 5.41, Moms, Art 241 II•.A.1154 i +aP'D.ut IN$ ten, et t.Jscaao• Us.-WWW"2atpn NDt33 r 2 a r 71ull 7Aa •'1 W,.,,N., ,caw rn.w,ne innl.Nbl 0. r,am,muq ad uWl quo Packaar d•wl. ul•3t2 a t a J - Maaln.r IPaclncohn,.f nd9 G1Dt can be fo+qd an;nx AI3 l62 6 it rhraP4N w•ew nrrerbeeexam or wwwteaddvraft.Tr%ok AF3-242; P/N 03-3242 OR APPROVED EQUAL AIR/OXYCEN DIFFUSER MANIFOLDS The air/oxygen disc diffusers shall include, but not be limited to, the following materials of construction. a_ Disc type 12in (3SOmm) membrane diffusers allow for maximum 12CFM and are resistant to Ozone and LIV b. Membrane material to be premium quality compression molded EPD1.1 with an oil content of less than 12% c. Diffuser membranes should have a minimum of 10.1 SS slit perforations and be at least 70%hydrophdk, with tensile strength at 2000 psi d. Diffuser to consist of membrane with integral gasket, base, retaining ring, and air flow control orifice e. Membrane shall collapse and seal when aeration system air is turned off f Sealing method of retaining device shall generate a minimum of SO pounds per inch/58 Kg/cm of circumference of the sealing gasket to provide a long term positive seal and to prevent air escape g. Diffuser base and retaining ring to be constructed of polypropylene with organic UV stabilizers and a tensile strength of 5000 psi h. Diffuser to have one 3/4in (2.Scm) connection method to manifold I. Each diffuser shall include a manifold that will connect up to two (21 air -discs to the air supply tubing j. Manifold base shall be constructed of high -density polyethylene plastic and Incorporate ballast channels for level sinking of pads during Installation WEIGHTED POLYVINYL CHLORIDE TUBING: Tubing shall be constructed of heavy, negative buoyancy, polyvinyl chloride (PVC) material. The PVC tubing shall be 1/2' (1 cm) with a minimum wall thickness of 1/4" (.64 cm), Pressure rating shall be 22S psi at 70o F (21 o C). Coil lengths shall be 100' (30 m), with a weight per ) 00' (30 m) of 43lbs (20 kg). Tubing shall be self -sinking, lead free, and contain carbon black for UV protection. Please consult your local distributor for additional Information. 1 minimum NON -WEIGHTED POLYETHYLENE TUBING: The polyethylene tubing shall be 1 /tin ( cm) with a min u wall thickness of .06in (l.Smm), Pressure rating shall be 100 psi at 73 F (22 C). Coil lengths shall be 100' (30 m). with a weight per 100R (30m) of I 1 Ibs (S kg). Tubing shall contain 2% carbon black for long term UV protection. Please consult your local distributor for additional information, INSERT FITTINGS: Insert fittings are used to repair, adapt, or connect with the polyethylene tubing. Fittings available shall Include line size couplings, male adapters, and elbows. TESTING: A. Safety - The aerator system shall be tested and approved as a unit. Separate component testing not allowed. Unit must be tested by ESL, ETL-C, CE, UL or other accredited testing facilities. B. Performance - Unit must have Independent perfarmance testing provided by GSEE. MANUFACTURER: The diffused air, aeration system shall be Air fto 3 Systems as manufactured by Otterbine Barebo, Inc.,3940 MAIN ROADEAST Emmaus,PA 16049, USA PH. (610) 96S-6018, or approved equal. For approved equal status, supplier shall provide the following information to the project designer, within 10 days of the bid opening date, for written approval. WARRANTY: The aeration system shall include a two year warranty on the air compressor, air diffuser and • f Diffuser Compressor(s) i Pistils) _ 0 Discs per Pad a Dlsc 4r Systam VolyA-m" p/n2SYSTEM - AF3.121 2 3 1 4 1 2 1 2 11 S/4.7n0 ?3aLS/60 22012J/50 AF3-131 3 AF3-141 4 AF3-112 2 2 AF3.122 4 AF3441 4 6 a 2 2 3 _ 6 1 4 6 a 115/3.9/60 4 230/4.7/60 6 220/S.6/50 AF3'261 AFI-281 AF3.222 2 AF3-232 AF3-242 Af3-262 underwater tubing. AF3-242: PIN 03-3242 OR APPROVED EQUAL AR FTo 3 tknused Mr S"rem Specinculom I Page 2 or 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 AT THIS TIME. SUCH IS THE CASE DUE TO THE PRECAUTIONARY EMBANKMENT DESIGNS PROPOSED. ASUMMARY OF THE EMBANKMENT DESIGN REQUIREMENTS ARE LISTED BELOW, MANDATING THE CONTRACTOR MEET THESE 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-9: TYPICAL. GRAPHICAL DETAILS iHomogeneous fill in \Cut off trencfl-V below suitable, mAteriol Sail or rock L - - - - - - - - - - - J TYPICAL HOMOGENEOUS EMBANKMENT Perforated collector - aroun�iL slo�s Foundation drain FOUNDATION DRAIN drain Send, gram or rock idrain cvlkt toe tz;Trionsitk2n filter CHIMNEY DRAIN Fill or gravel Blanket drain BLANKET DRAIN Rocs or grovel drain Tron3ition 1;1(Or TOE DRAIN Fisure A-Ia. Homogeneous Err/bankFnents 1r Seepage Controls APPROVEWPOND N 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. StormRaxTm ROUND SERIES TRASH RACK CONCRETE MANHOLE STANDARD 60 INCH RACK SHOWN DIMENSIONS IN INCHES iJW-11 StormRaxT" Round Series for Concrete Manhole hrt Na DIM A Dim B Dim C Min ID Min OD PS-24 17Y4 14% 2a 24 30 W36 21 a 14 40 36 43 RS48 271' is 54. 48 57 RS60 273E 12 66 6o 70 Plastic Solutions, IrIC. CUSTOMER PO Box 4386, Ntrsrlsester, VA 22604 Z38 McOf.e� Rd, Wlncllestax• VA 22603 ;877) 877-5727 phone p(C7- ;540) 722.2219 tax ht4b//www.pla+do soWBon inn WET POND 4 MODIFICATIONS:\/ �%` \ ' APPROVED 'WET POND 4' PLAN 1. THIS PLAN ONLY PROPOSES ONE CHANGE TO THE SCALE 1"=30' APPROVED 'WET POND 4'. THIS PLAN PROPOSES TO APP/(',`OV D g1PRAP LINED PERMANENTLY PLUG (WATERTIGHT) THE TWO APPROVED / CHA NE)(PRQ7ECON SWM ORIFICES, AND REPLACE THEM WITH TWO NEW SWM // 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 ,/ APPROVF DFORE AV \ \ SHALL REMAIN. THIS PLAN SIMPLY SHOWS THE B OM ELEV.=3 0.0' \ \ \ o \ ADEQUACIES OF THE APPROVED 'WET POND 4' WITH THE / � FUTURE TOWN CENTER & BLOCK 5. SEE ORIGINAL WPO t. APPROVED PLAN FOR DETAILS (WPO 4. AN ASBUILT SURVEYOF WET POND 4'0IS7REQUIRED / / / \ \ FO �� BEFORE THE FULL RELEASE OF THE SWM BOND. / / / CEBAY LL / APP VED 6ABI B�T STAB ZED OVERFL SPt{LW�jY, /CR TELEV.3670' 1b0 IR IEWSE 370/.9 10 RPEAK wS370.4 E='1-Y PAI W�E=6917 / m � / \ � o MAIN � / CELL 1 / RAI EE•SE E T.� r / I APPROVED ENCOM ASSING WE PdND MWSE=366.00 PER WP(J 2Q170Q037�. I I I I I I I � / / � / MANAGED STEEP I 7�'• M • SLOPES, TYP. IAPJJ{{,,RONEDIPOf�ID I I / BOTTOM E�EV. I358 0 PP I / RAN61NN,�G NE�ATON BETWEEN 3 6' 36q.20' PI ER WP 20 70 037, I I I APPROVED 1,2'WIDE TOP pppF DAM ELFV.=372.0' IAP RO ED O'WIDE AQUATIC BENCH AN IN( IN ELEVATI N BETWEEN 3 .5 & 366' PER WPO 01700037. -� 1 I APPAZOV �' WIDE \ \ J RIP AP INE EMERGE AGENCY I / / PIj�I�W 7/1 TE .) Y \ \ \ / APPROVED 12'WIDE 370.20 (F7000iI,. // \ \ / ACCESS ROAD TO POND 4 / / I / �- FOR POTENTIAL , APPROVED'STM X-02'DRAINAGE / AINTENANCE / 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 / INV OUT=363.30 (060" RCP) ADDITIONAL DOWNSTREAM WATER I QUALITY TREATMENT. SEE WPO N / i� (TO BE REPLACED WITH NEW 03" ORIFICE, INV =366.00) 201700037 FOR DETAILS. �' / - �" ' N (TO BE REPLACED WITH (6) SIX NEW 08"MID -FLOW / / / ,� �•� // n ORIFICES, INV. 369.25) I O JRT PROVED LOW -FLOW PIPE M I 6' 01.556) DIRECTING A GREENWAY,ION OF THE RUNOFF ToTYP. PROVED LEVEL SPREADER > I PER WPO 201700037. TR P. \ APPROVED LEVEL SPREADER, ` APPROVED 69.11' OF 060" RCP / PEWPO 201700037. AT 1.59%WITH CONCRETE / / CRADLE TO SERVE AS WET POND 4's BARREL WP0201700037. APPROVED 30' LONG CLASS I (WPO ) -� - � RIP -RAP OUTLET ION / OU PR CiO O TE ,\\ \ UNDER WP0201700037. / CONSERVATION EASEMENT PER WPO 201 APPROVED VDOT STD. ES-1 �00037. � UNDER WPO 201700037. - -' �� / \\ � o NODE STR YURA1. PLASTIC Oy PLASTIC SOLa-M%rrl:. OWVi-ER SECTION REMOVAaLL TOR ACCESS __7 `1 •: ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE OPTIONS CROSS BRACING FOR OVERHANG HOPE ANTI -VORTEX PLATE ./ DATE- DRAWN BY: APP.III DETAIL Lic. No. 035791 08/04/20 Z O a ZLu OZ o O Ln J 1.4 (4 H z rA V/ o w of NW Sire i- Z w 0 O U (n LD i- z z w W o w O Z U L9 Z W Z zM oU CD O N LIJ � n Q � w w a m z Q w g Y LU p W W Q > O of L9 7- ti d b) QC'7 !! N A. CN N \N W J J < J _ `�^ W Q i W w r COUNTY OF ALBEMARLE ' M Department of Community Development n T� O Construction Record Drawings (As -built) for VSMP z Z Q 0 LU The following is a list of information required on construction record drawings for U LU stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the construction record drawing be prepared by someone other than the designer. Please do not III I' 1 z provide design drawings as construction record drawings. LU U LU ~ W < A. A signed and dated professional seal of the preparing engineer or surveyor. B. The name and address of the firm and individual the drawings on the title sheet. 5 ( preparing Lfl l C. The constructed location of all items associated with each facility, and the inspection records to verify � proper dimensions, materials and installation. The items include, but are not limited to the following: I- J Q 1. Inspection Records and photographs for pipe trenches and bedding, including underdrains. LU LU J 2. Video Pipe Inspection for any pipes which are not accessible or viewable. LU 3. Updated Location with geo-coordinates of all facilities. 4. Verified Drainage Area for the drainage treated, for drainage to the facilities. F--- Itr_ W maps area and O 5. Current physical and topographic sun'ey for all earthen structures. Ponds should include a survey H 0 of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required W LU for alterations from the design. O 6. Plants, location and h'pe. 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display tlx J W' Q O installed type of drainage structures, culver-Upipe size, weirs, materials, inlets or end treatment(s)• (D 0/ inlet and outlet protection, alignment and invert elevations compared to design. CD LL 8. Computations: For significant deviations from design, provide scaled computations verifying that CD 0 N the as -built condition is equivalent or better than design. 9. Ditch Lines - Display the constricted location of all ditch lines and channels, including typical sections and linings. 10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage must be within platted easements. Provide copies of recorded documents. W w 11. Guardrail, fences or other safety provisions - Display the constructed location of all safety a Jun I provisions; fences, guardrail, including the type, length and applied end treatments, compared to JOB No. design. 182150 12. Material layers - biofilter media, stone layers, sand layers, keyways and cores must be verified as to material types and depths. Include inspection reports, boring or test pit reports and materials SCALE oerfifications. Biofilter media must be an approved state mix. AS SHOWN 13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable. 14. Compaction reports are required to verify fill compaction in dams. sHEET No. 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. 17 LEVEL SPREADER DETAIL (LS41) (WITH BUBBLED REVISIONS) _____�-__— — _ STM -- - —_--�_=15+0C� - � ,— — APPROVED LEVEL SPREADER & 15 BYPASS /SPLITTER FLOW p �, - ----� PIPE SHALL NOT BE CONSTRUCTED PER THIS PLAN. THIS Q APPROVED 'STM A01.1' ELBOW AS REQUIRE _- �ryo � PLAN REMOVES THE INSTALLATION OF THESE STRUCTURES. ,61,'• RIM=3 MODIFIED IVHOPE� - (TO ) .-' __-__. - 58.00 (TO REMAIN) ----- - 048" INV. IN=350.33 (TO REMAIN) TW 13W350.60 015" INV. OUT=350.23 (TO BE REMOVED OR SEALED WATERTIGHT) o a TW351.55 STM 048" INV. OUT=351.23(NEW INV.=350.23) BW 351.55 A01 1 TW 351.00 1 rda ----PROP. - EN-0 BW 351.00 TW 352.00 G 349.98 'ifj �0 SWM FACILITY EASEMENT _ .13349.68 LPROP OSPS AI RG P9.898I '1 LFPCLAS 35030 _ G 350.26 ..:. / G 350 20 \ PROP. NSERVATIO .3 '. •'. •'ay r• / EASEME ----- .. - ---- - 349.68 .LEVELSPREADER % -------- .•�j�' / OP.B'SPREADER LIP \ ---- '' % / ORTSTONELAYER ----------------------------- G 350.20 / �T / vV �ROP. CONSERVATION EASEMENT�V / / / / I \ / i / 10 5 25 10 I LEVEL SPREADER LS-11 VICINITY MAP, SCALE 1e=100' / 1 I 1 \ II I APPROVED LEVEL SPREADER LS-11 (NOT YET CONSTRUCTED) IS PROPOSED TO BE REMOVED WITH THIS PLAN. POLO GROUNDS ROAD SCOTT/R. Ct?LLINS2 Lic. No. 035791,a 08/04/20 Sv�i Z Z O a w Z O J co =) J 00 z V) Y/ w W ce F Z w 0 O U cn ~ z Z w w g w O Z_ V U }r W Z ZD UO CD O N � n Q K w a CD 5 Z Q U g c O w <n a > O � 0 0 0 0 CAC) N t0 a0 oum 0 z u ul z � N U C > N 0 0 L Y 3 0 o 1 0 N > O L..L cl. 0 O N n o N v' v Q Ul N LU V / C Q o J Q LJ ° _J >C Q O Ur^) VJ `o n 0 O Q z w 0 a 2 O Z U U H Q 0 1 w W w o C m>Q E U) > o � J � Z w J 0 O z H w Z H w o O Q O n ° n > o N c MM W ° w J F J F_ w � w Y = JOB NO. 182150 SCALE AS SHOWN SHEET NO. 18 BrookhIll Stormwater Quality Summary Table Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Amount of Offsite Credits Created Credits Purchased (lb/yr) (lb/yr) Percent of Total Development Offsite Credits (%) 1 4A Apartments Pond 11 Wet Pond 4.01 WP0201800051 0 1.27 3.7% 1 4A Apartments DP-4A Detention Pond w/ Underground Storage - WP0201800051 1 4A Apartments CDS-4A COS Unit (Manufactured Device) 1.60 WP0201800051 1 4A Apartments LS-11 Sheet flow to open space REMOVED - WP0201800051 1 4B Apartments Pond 11 Wet Pond 0.18 WP0201800051 1 4B Apartments UD-4B Isolator Row (Manufactured Device) 3.38 WP0201800051 1 4B Apartments Pond 4B Extended Detention Pond 0.79 WP0201800051 1 4B Apartments LS-46 Sheet flow to open space 0.74 WP0201800051 1 - ROW Pond 11 Wet Pond 0.18 WP0201800013 0 1.09 3.2% 1 ROW LS-11 Sheet flow to open space REMOVED - WP0201800013 1 ROW LS-11 Sheet flow to open space REMOVED - WP0201800013 1 8B ROW and Block 8B Pond 10 Wet Pond 5.91 WP0201800080 0.68 1.53 2.5% 1 ROW LS-10 LS-10 REMOVED - WP0201800080 1 - ROW LS-10 LS-10 REMOVED - WP0201800080 1 3 Section 1 Mass Grading Pond 4 Wet Pond 20.56 WP0201700037 (Amendment #2) 0.46 0 1.4% 1 3 Section 1 Mass Grading LS-4.1 Sheet flow to open space 5.14 WP0201700037 (Amendment #2) 1 3 Section 1 Mass Grading Wet Pond B Wet Pond 8.53 WP0201700037 (Amendment #2) 0 0 0.0% 1 3 Ice Rink ROW Pond 11 Wet Pond 0.38 WP0201800050 0.08 0 0.2% 1 3 Ice Rink ROW LS-11 Sheet flow to open space REMOVED - WP0201800050 1 3 Ice Rink ROW Pond 4 Wet Pond 0.89 WP0201800050 0.68 0 2.0% 1 3 Ice Rink ROW LS-4.1 Sheet flow to open space 0.67 WP0201800050 1 3 Ice Rink Pond 4 Wet Pond 2.20 WP0201800050 1 3 Ice Rink LS-4.1 Sheet flow to open space 1.79 WP0201800050 1 8A Senior Living Facilir Pond 11 Wet Pond 3.70 WP0201900004 0.01 0 0 0.0% 1 8A Senior Living Facilit, LS-11 Sheet flow to open space REMOVED - WP0201900004 Section 1 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (lb/yr) Phosphorus Removal achieved w/proposed plan (lb/yr) Anticipated Amount of Offsite Credits Purchased (Ib/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 1 Pond 4 Treatment Tota 1 6.77 23.65 1 Pond 7 Treatment Total 8.11 TBD 1 Pond 10 Treatment Total 6.94 5.91 1 Pond 11 Treatment Total 9.68 8.45 1 Pond 4B Treatment Total - 0.79 1 Manufactured Devices Treatment Total 2.62 4.98 1 Infiltration Treatment Total 21.71 0 1 Wet Pond B - 8.53 1 Sheet Flow to Open Space Treatment Total 9.74 8.34 Section 1 BMP Treatment Total 65.57 60.65 Section 1 Offsite Nutrient Credits Total 6.8 20.0% 1 3.89 1 11% Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 2 9 Townhouses Blk 9 Wet Pond Level II Wet Pond 5.87 WP0201800086 2.10 o 6.2/0 2 10 Townhouses Blk 10- UGD Underground Detention (No Water Quality) - WP0201800086 2 11 Townhouses - FYI: A 2.08 Ibs/yr credit is appied to the Blks 9-11 WPO 20200004 plan from the immediately adjacent Wet Pond B in WP0201700037 Amendment #2. This credit is accounted for above in Section 1's Wet Pond B's 8.53 Ibs/yr removal rate and is therefore not shown in Section 2's removal rate summary. WP0201800086 Section 2 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposedachieved w/master plan (lb/yr) Phosphorus Removal w/proposed plan (1b/yr) Anticipated Amount of Offsite Credits Purchased (Ib/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 2 Pond 12 Treatment Total 8.06 2 Sheet Flow to Open Space Treatment Total 1.67 - 2 Blk 9 Wet Pond - 5.87 2 Blk 10- UGD - 2 Credit Appied from WP0201700037 Amendment #2 - - Section 2 Treatment Total 9.73 5.87 Section 2 Nutrient Credits Total 6.8 1 20.0% 1 2.10 1 1 1 6.2% Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 3 13 TBD TBD TBD TBD TBD TBD TBD 4 14 TBD TBD TBD TBD TBD TBD TBD 3 12 TBD TBD TBD TBD TBD TBD TBD Section 3 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposedachieved w/master plan (lb/yr) Phosphorus Removal w/proposed plan Ib r ( /y) Anticipated Amount of Offsite Credits Purchased Ib/yr) ( Anticipated Percent of Total Development Offsite Credits (o) Amount of Offsite Credits Purchased Ib r) ( /yo Percent of Total Development Offsite Credits () 3 Pond 13A Treatment Total 9.13 TBD 3 Sheet Flow to Open Space Treatment Total 5.95 TBD Section 3 Treatment Totall 15.08 TBD Section 3 Nutrient Credits Totall 6.8 20.0% TBD TBD Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 4 13 TBD TBD TBD TBD TBD TBD TBD 4 14 TBD TBD TBD TBD TBD TBD TBD 4 14 TBD TBD TBD TBD TBD TBD TBD Section 4 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposed w/master plan (lb/yr) Phosphorus Removal achieved w/proposed plan (Ib/yr) Anticipated Amount of Offsite Credits Purchased (Ib/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 4 Pond 13A Treatment Total 14.05 TBD 4 Sheet Flow to Open Space Treatment Total 0.04 TBD Section 4 Treatment Totall 14.09 1 TBD Section 4 Nutrient Credits Totall 6.8 20.0% TBD TBD Section Block Common Name SWM Facility ID Type of Facility Phosphorus Removal achieved w/proposed plan (lb/yr) Plan # Amount of Offsite Credits Purchased (lb/yr) Percent of Total Development Offsite Credits (%) 5 16 TBD TBD TBD TBD TBD TBD TBD 5 17 TBD TBD TBD TBD TBD TBD TBD 5 18 TBD TBD TBD TBD TBD TBD TBD Section 5 Master Plan Comparison Section SWM Facility ID Phosphorus Removal proposedachieved w/master plan (lb/yr) Phosphorus Removal w/proposed plan (Ib/yr) Anticipated Amount of Offsite Credits Purchased (Ib/yr) Anticipated Percent of Total Development Offsite Credits (%) Amount of Offsite Credits Purchased (Ib/yr) Percent of Total Development Offsite Credits (%) 5 Pond 14A Treatment Total 4.81 TBD 5 Pond 14B Treatment Total 6.42 TBD 5 Pond 15A Treatment Total 5.16 TBD 5 Pond 15B Treatment Total 5.14 TBD 5 Pond 16 Treatment Total 11.75 TBD 5 Grass Channel Treatment Total 2.1 TBD 5 Sheet Flow to Open Space Treatment Total 1.43 TBD Section 5 Treatment Total 36.81 TBD Section 5 Nutrient Credits Totall 6.8 20.0% TBD TBD Overall Treatment Totall L41.28 1 66.52 Overall Nutrient Credits Purchased 34 100.0% 5.99 1 1 17.6% Anticipated Treatment Total With SWM Master Plan L75.56 Notes: 1. Even though we are currently only proposing to purchase 34 Ib/yr or 19.37%, the total offsite credits available for purchase are 25% of the total 175.56 Ib/yr required for the development, or 43.89 Ib/yr 2. Actual credits purchased to date are 2.36 lb/yr. 3. Credit amount approved to be purcased with Block 8B, but not yet purchased, is 1.53 Ibs/yr. of phosphorous (WPO 201800080). 4. Credit amount to be purchased (pending approval) with Blacks 9-11, but not yet purchased, is 2.10 Ibs/yr of phosphorous (WPO 20200004). 5. A nutrient credit purchase is not required with this plan (Amendment #2 to WPO 201700037). �;OTT vtSCR. LLINSZ Lic. No. 035791 ,'�, z 0 a U U V) W 0 z 0 U) w rD J a 08/04/20 ZONAL L C7 v W M J 0') Z m M 0 U i U N ce Z Q W N W > �/'� ° W VJ U Z J Q J U _3 W Q J 0--1 �yy L9 O l� V or Z w Z�OZ~ W Y U o w UlU J U) J Z W J r LUJ 0 H� O U) = � J � � m J O a J O Ce > < C) coCN U W J W U W [C = d L0 JOB NO. 182150 F-16FAR; NONE SHEET NO. 19