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HomeMy WebLinkAboutWPO202100002 Plan - VSMP 2021-01-11AVON COURT INDUSTRIAL BUILDING GENERAL NOTES OWNER: AVON COURT HOLDINGS LLC PO BOX 1467 CHARLOTTESVILLE, VA 22902 DEVELOPER: RIVERBEND DEVELOPMENT 455 2nd STREET, SE, SUITE 200 CHARLOTTESVILLE, VA 22902 ENGINEER: COLLINS ENGINEERING 200 GARRETT ST, SUITE K CHARLOTTESVILLE, VA 22902 (434)293-3719 TAX MAP NO.: 07700-00-00-008BO DB.3211, PG.589 TOTAL PROJECT AREA: 6.78 ACRES ZONING: LIGHT INDUSTRY (LI). THE PROPERTY IS ALSO SUBJECT TO THE AIRPORT IMPACT AREA (AIA) ENTRANCE CORRIDOR OVERLAY (ARB), STEEP SLOPES OVERLAY, AND FLOODPLAIN HAZARD OVERLAY DISTRICT AS DESCRIBED IN SECTION 30 OF THE ZONING ORDINANCE. TOPO & SURVEY: SURVEY AND TOPOGRAPHY PROVIDED BY JENNINGS-STEVENSON, P.C. IN JANUARY 2007 AND UPDATED IN JULY, 2008. TOPOGRAPHY IS FIELD SURVEY OF THE PROPERTY AND TOPO HAS BEEN FIELD VERIFIED BY COLLINS ENGINEERING IN SEPTEMBER, 2020. SEE SHEET 2 FOR LOCATION OF BENCHMARKS ON THE SITE. DATUM: NAD83, NAVD 88 EXISTING CONDITIONS/VEGETATION: SEE SHEET 2 FOR EXISTING CONDITIONS OF THE SITE. PORTIONS OF THE SITE AR WOODED, WHILE OTHER PORTIONS HAVE BEEN CLEARED FOR THE PREVIOUS USE OF THE SITI PROPOSED: 79,000 SF LIGHT INDUSTRY/MANUFACTURING BUILDING, INCLUDING 4,662 SF OF SPACE OPEN TO THE PUBLIC FLOOR AREA TO LOT COVERAGE RATIO: 79,000 SF 16.78 ACRES = 0.27 MAXIMUM EMPLOYEES: 100 EMPLOYEES DURING THE LARGEST SHIFT ON THE SITE. FLOODPLAIN INFORMATION: THIS PROPERTY IS LOCATED IN ZONES'AE' &'X' AS SHOWN ON THE FLOOD INSURANCE RATE MAP, MAP NUMBER 51003CO288D, EFFECTIVE DATE: FEBRUARY 4, 2005. STREAM BUFFERS: STREAM BUFFERS EXIST ON THE PROPERTY, AS SHOWN ON SHEET 2. STREAM BUFFERS SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE. STEEP SLOPES: MANAGED SLOPES AND PRESERVED SLOPES EXIST ON THE SITE, AS SHOWN ON SHEET 2. THE PRESERVED SLOPES SHALL REMAIN UNDISTURBED, AND THE MANAGED SLOPES WILL BE DEVELOPED IN ACCORDANCE WITH ALBEMARLE COUNTY REQUIREMENTS. ADJACENT PROPERTIES: SEE SHEET 2 FOR THE ADJACENT PROPERTIES TO THE SITE. WATER SUPPLY PROTECTION AREA: N/A WATERSHED / WATER RESOURCE AREA: THE SITE LIES WITHIN THE MOORES CREEK WATERSHED AND DOWNSTREAM OI THE SOUTHFORK RIVANNA RIVER SUPPLY WATERSHED. WETLANDS: THERE ARE NO WETLANDS PRESENT ON THE SITE PER FIELD DETERMINATION. ALLOWABLE DENSITY: N/A PROPOSED DENSITY: N/A GREENWAY/RW DEDICATION: 0.5 ACRES DEDICATED TO PUBLIC USE FOR AVON COURT EXTENSION RIGHT OF WAY. BUILDING HEIGHTS: PROPOSED (1) STORY BUILDING. MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 65 FEET. NOTE: HEIGHT OF BUILDING OVER 40 FEET OR 3 STORIES SHALL PROVIDE A STEPBACK PER SECTION 4.20. PROPOSED BUILDING HEIGHT: 1 STORY (APPROXIMATELY 30 FEET) SETBACKS: FRONT SETBACK: 10' SETBACK (REDUCED FROM 50' PER BZA APPROVAL OF VA20090004 ON 7-7-09) INTERIOR SETBACKS FROM PARCELS OF THE SAME ZONING: ZERO SETBACK BUILDINGS CAN SHARE A LOT LINE, PROVIDED THE BUILDING MEETS FIRE REGULATIONS SETBACKS FROM ADJACENT PARCELS WITH DIFFERENT ZONINGS: SO'BUILDING SETBACK, 10' PARKING SETBACK 30' UNDISTURBED SETBACK PUBLIC ROAD: EXTENSION OF AVON COURT WITH CURB & GUTTER UTILITIES (WATER AND SEWER): COUNTY PUBLIC WATER AND SANITARY SEWER AGRICULTURAL/ FORESTAL DISTRICT: NONE LIGHTING: SEE LIGHTING PLAN SHEET 6 OF INITIAL SITE PLAN. PROPOSED LIGHTING SHALL COMPLY WITH REQUIREMENTS OF SECTION 32.7.8 & SECTION 4.17 OF THE ZONING ORDINANCE. LANDSCAPING: SEE LANDSCAPING PLAN, SHEET 5 OF THE INITIAL SITE PLAN. THE LANDSCAPING PLAN IS IN ACCORDANCE WITH ALBEMARLE COUNTY ORDINANCE SECTION 32.7.9, SEE SHEET 5. STREET TREES SHALL ALSO BE INCLUDED WITH THE LANDSCAPING DESIGN TO INCORPORATE STREET TREES EVERY 40' ALONG THE ROADWAYS. TRASH RECEPTACLES: TRASH DUMPSTERS ARE PROPOSED ON -SITE FOR TRASH SERVICE FOR THE BUILDING. PHASING: THIS SITE SHALL BE DEVELOPED IN ONE PHASE. PARKING REQUIRED: 1 SPACE/EMPLOYEE ON THE LARGEST SHIFT (100 EMPLOYEES) = 100 SPACES 1 SPACE/500 SF OPEN TO PUBLIC (4,662 SF) = 10 SPACES TOTAL PARKING REQUIRED: 110 SPACES REQUIRED PARKING PROVIDED: TOTAL PARKING SPACES PROVIDED = 126 SPACES (INCLUDING 6 HANDICAP PARKING SPACES) STORMWATER MANAGEMENT: SEE THIS SET FOR PROPOSED SWIM FOR THE PROPOSED DEVELOPMENT. CEMETERIES/ BURIALS: THERE WERE NO CEMETERIES FOUND ON THE SITE DURING THE FIELD INVESTIGATION AND SURVEY/TOPOGRAPHY OF THE PROPERTY. DAM BREAK INUNDATION ZONES: THE PROPERTY IS LOCATED IN BOTH A FEDERAL AND STATE DAM BREAK INUNDATION ZONE VSMP PLAN SCOTTSVILLE DISTRICT ALBEMARLE COUNTY, VIRGINIA / CITY CHARLOTTESVILLE B. O.B. 4462462 PC 562 TAX PARCEL ZONING LI / / M GRAPHIC--KA\; 80 n 40 80 160 ( IN FEET ) 1 inch = 80 ft. CITY OF CHARLOTTESVILLE D.B. 4462 PG. 562 TAX PARCEL ]]-] ZONING LI ` APPROXIMATE LOCATION OF--------- \-FEMA FLOOD PLAIN �'�' \/ �H-0Ut-NDB5TAX PAZONI CITY OF CHARLOTTESMLLE `` S D.B. 4462 PG. 562 �F TAX PARCEL ]]-] ZONING: LI SIY ¢UI O�c TB Ck APPROXMATE LOCATION OF BEACH FEMA FLOOD PLAIN AREA 320 SHEET LAYOUT SCALE: 1" = 80' RETAINING WALLS: RETAINING WALLS ARE PROPOSED WITH THIS PLAN, SEE SHEET 4 (GRADING AND DRAINAGE PLAN) OF THE INITIAL SITE PLAN. RETAINING WALLS SHALL BE CONSTRUCTED IN ACCORDANCE WITH ALBEMARLE COUNTY REQUIREMENTS. RECREATION: N/A LAND AREA: (TMP-6025A) - TOTAL ACREAGE = 6.78 ACRES PROPOSED BUILDING: 79,000 SF - 1.82 AC. (26.74%) PROPOSED PAVED PARKING AND TRAVELWAYS: 85,100 SF - 1.94 AC. (28.8%) SIDEWALKS/SITE CONCRETE: 18,300 SF - 0.42 ACRES (6.2%) AREA OF R/W DEDICATION: 21,600 SF - 0.50 ACRES (7.3%) OPEN AREA / LANDSCAPING AREA 91,480 SF - 2.10 ACRES (31.0%) IMPERVIOUS AREAS: 192,225 SF (4.41 ac.) TOTAL LOCATED WITHIN LIMITS OF DISTURBANCE. PAVED PARKING AND CIRCULATION AREA: 85r 100 SF SITE ACCESS: ACCESS TO THE DEVELOPMENT WILL INCLUDE THE EXTENSION OF AVON COURT TO A PROPOSED CUL-DE-SAC ON THE PROPERTY. (2) ACCESS POINTS INTO THE PROPERTY ARE PROPOSED FROM THE EXTENSION OF AVON COURT. WILLOUGHBY PROPERTY OWNER'S ASSOCIATION INC. C/O REAL PROPERTY INC TAX PARCEL 76M2-01--D ZONING: BUD \ � M i PSALM THIRTY FOUR ! PROPERTIES. LLC OF CH4RLO ALBEMARLE 64 VICINITY MAP SCALE: 1" = 1000' EROSION CONTROL LEGEND SA SAFETY FENCE 3.01 CE CONSTRUCTION ENTRANCE 3.02 CRS x x CONSTRUCTION ROAD STABILlZA7/ON 3.03 SF -X-X-X- SILT FENCE 3.05 SS -SSE- SUPER SILT FENCE 3.05 lP ® INLET PROTECTION 3.07 DD 0 TEMPORARY DIVERSION DIKE 3.09 RW �+ TEMPORARY RIGHT-OF-WAY 3.1 J ST O DIVERSION TEMPORARY SEDIMENT TRAP 3.13 SB SEDIMENT BASIN 3.14 PIPE OUTLET PROTECTION 3.18 RR RIPRAP 3.19 TS TS TEMPORARY SEEDING 3.31 PS PS PERMANENT SEEDING 3.32 TP TREE PR07ECTION FENCING 3.38 DC OC DUST CONTROL 3.39 # NRGINIA EROSION & SEDIMENT CONTROL HANDBOOK SPECIFICA77ON NUMBER SHEET INDEX TITLE SHEET COVER SHEET 1 EXISTING CONDITIONS AND DEMOLITION PLAN 2 EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS 3 PHASE I EROSION & SEDIMENT CONTROL PLAN 4 PHASE II EROSION & SEDIMENT CONTROL PLAN 5 PHASE III EROSION & SEDIMENT CONTROL PLAN 6 EROSION & SEDIMENT CONTROL DETAILS 7 STORMWATER MANAGEMENT PLAN 8 STORMWATER MANAGEMENT DETAILS 9 UNDERGROUND DETENTION SYSTEM STANDARD NOTES & DETAILS 10 TOTAL SHEETS 10 NOTES: CONTRACTOR SHALL VERIFY LOCATION AND ELEVATION OF ALL UNDERGROUND UTILITIES SHOWN ON PLANS IN AREAS OF CONSTRUCTION PRIOR TO STARTING WORK. CONTACT ENGINEER IMMEDIATELY IF LOCATION OR ELEVATION IS DIFFERENT FROM THAT SHOWN ON THE PLANS, IF THERE APPEARS TO BE A CONFLICT, AND UPON DISCOVERY OF ANY UTILITY NOT SHOWN ON THE PLANS. I1:I>IK�P11:7_TNN]:iLl�i.9�[iZN_\I>•1��Y�1 7yiN�_1�D1FY�I:II.YO 7y_INiO11�11IiyK 7[�li[�1_1�1'�Ti'L�] 7:<iPF911a ANY SIDEWALK AND/OR CURB DAMAGE IDENTIFIED IN THE SITE VICINITY DUE TO PROJECT CONSTRUCTION ACTIVITIES AS DETERMINED BY THE VDOT INSPECTOR SHALL BE REPAIRED AT THE CONTRACTOR'S EXPENSE. SIDEWALK WILL BE REPLACED AT THE DIRECTION OF THE VDOT INSPECTOR. ANY EXISTING SIDEWALK THAT IS CURRENTLY DAMAGED AND IN NEED OF REPAIR OR NOT IN COMPLIANCE WITH CURRENT STANDARDS SHOULD BE REPLACED AS PART OF THIS PROJECT AS WELL. IN ADDITION, ANY EXISTING CG-12S ALONG THE PERIMETER OF THE SITE SHOULD BE UPGRADED TO MEET CURRENT STANDARD IF NEEDED. F_1��.y[eI�IhR1_1 �hlYc\97�I��I�L/d891�[e1,Y.9a_1��:] �KiP69691��L�`L711:�1:1>•b 1p[N� CONTRACTOR SHALL OBTAIN ENTRANCE PERMITS FROM VDOT PRIOR TO CONSTRUCTION. APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNER/ZONING ENGINEER INSPECTIONS ARB DEPARTMENT OF FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VIRGINIADEPARMENT OF TRANSPORTATION HEALTH DEPARTMENT ;COTTLR. Ci3LLINSIZ Z Lic. No. 0357911' 1 0&ONAL z O a k Z w DO M Un O z J O Un F > z w H W Ine 0-)0_ z f z0-' CAI V / W N O V (� V W N z N zQ 0 > J W L9 W J Lu Lu z 0 < (� J III W=�' C� 0 ul z LLJ z u L-1 w J J� o U W z O Q O �. O N V w w O � a w x � JOB No. 202193 SCALE AS SHOWN SHEET NO. 1 rr lz / EXISTING 30' SANITARY SEWER EASEMENT -�i CITY OF CHARLOTTESVILLE D.B. 4462 PG. 562SANITARY — TAX PARCEL 77-7-7 SEWER LEGEND: ZONING: LI T3 15 84' NV.=341.29' ----- PRESERVED SLOPES 0 �° ss - - - - ss - - - CITY OF CHARLOTTESVILLE SANITARY D.B. 4462 PG. 562 MANAGED SLOPES -�—�- TAX PARCEL 77-7 — ----- ------ - - - SS - - / INV_340.93, TOP=351.32' ZONING: LI PRESERVED SLOPES TO BE SS _ MANAGED SLOPES BASED ON — ©-- FIELD RUN TOPO ANALYSIS - / EXISTING TREES / EXISTING / / ` \ \ EXISTING 100 SAN. SWR 89 5p' _\ YEAR FLOODPLAIN - - \ 354 / f f �� �� APPROXIMATE _ �/ /' ✓� -i ,f60 �� }r�� LOCATION OF / - -� - ' - T - - - \--- �- — -- - - - - FLOOD PLAIN MANAGED STEEP SLOPES_- �/ OVERHE— /EDGE- OF ---- �— UTIL CS00DS - _ _ i / ^ _ - ITI� LIGHTHOUSE LAND LLC _ - _�-\ \ _ i 0' WIDE AREA RESERVED N91 (TYP.� - Rt -- -_ ,I FOR FUTURE DEDICATION D.B. 5002/G. 78 / ---- l o TAX P f3CEL 77-9 \\ y / ^,\ \� J, �K 376 \ \ I Io FOR PUBLIC U OR ZO�PI�NG: LI / GRADING P POSES) EV j� 0 D.B. --- , PG.----- / E - / N81°5335 GE OF' 20, -"- 21.5' WIDE AR A RESERVED 4143 o/ � AV L \ / 11EDG€ OF '�-- \\ DGEbF' ��N1`\ o -OR FUTURE EDICATION / \\ ED ti DEMENT- FOR PUBLIC SE ,cCO D.Q. PG.---- WOODS' , 215 ---- ' EXISTING / �^ - v tTYP.) �380 i EXISTI 30' lass/ / > / / , T ELINE 3>g_\ i �� �' } PRESCRIP IVE EASEMENT SANITPR ? , // / ' -" �X13TING B�I�RHEAD POW R _ \ MISTING S SEW MH / / _ _ _ � -. � _ _ _ - - - LINES TO BE REMOVED AL NG - ` \ ISTANC EASEM T T<=352.74' I I �' ,' / \ 1\ - YJITH THE EXISTING POWER S --" / l 3) _ - --- --_- \ Z d 8. / �- _ --- �� \ " �� EXISTING GRADNG AN �0 1 I o 1 MANAGED v � �� V (P / -�'� V DRAINAGE EA MENT \ \ cD i C STEEP SLOPES - - ; i ' - - _ _ - - - - - - \ s B. 357'0' P 510 EXISTING GRAVEL / \ AREA �' '' �' T01�€ REMSTING �VED o�� \ SSIGD.BH-DIS-ANCE EASEMEN EXISTING ARIABLE IDTH EXISTING VARIABLE \ \ \ \ \ --^� EXISTING WELL TO BE t tiF PAVED OAD 1/_ WIDTH UTILITY EASEMENT \�\�\ - o, - aye R \' �� I s/0'24'25"E �3> ��� , � �' ABANDONED IN ACCORDANCE � 7`�OVERHEAD � A �Q I I 86.00' D.B. 3575, PG. 28 \\ - 1 WITH HEALTH DEPARTMENT _ S �L� ,3 � REGULATIONS f UTILITIES g2 EXISTIN TREES --- \ TO BE EMOVED 'APPROXIMATE \ ' -, - - - _ \ > J/ \ - OF LOCATION OF - \ �.• - S53 FEMA FLOOD PLAIN 1 \ . \ U� OMA ST EP LO�S EXISTING T{�Tv1PORARf \ \ ,1 GRADIW EASEMENT B.,---,PG._\- AINAGE EASEMENT D. ----' PG.- \ Aso \ �` - - - - - \ - - \ - \ m PRESERVED STEEP SLOPES - \ - - - - �' _ - �o L-4SSIFIED A MANAGED SLOPEE- - \\. ----- _� \ $ED ON FIELD RUN TOPO ELEV \ --- _ ` 1 EDGE` 0� \ \ 1 )0, WPO N+QODS \ \ 00\ \ \� o TREAM BUFFER�UILJT�E5 EXISTING 1_ �_ ���\ \'�-, � YEAR FLOODPLAIN - - - _ _ - CITY OF CHARLOTTESVILLE - -D.B. 4462 PG. 562 \ \ TAX�PARCEL,77=7- ZONING: LI _ 7-7 \: _ -i380 / \ \ \ ORES R — ----- — r��� \ — _ QNE \ --- YEAR FLOODPLAIN-------------------------- , `\ --- - \ APPROXIMATE _- _— _ _ _ - - — — _� r; �\ -JII\-- PRESERVED LOCATION OF — N6~18 \9EA2t=r-351� STEEP SLOPES FEMA FLOOD PL 2S' AREA / SIGHT DISTA E ASEME T / D.B. ----' P '58'3�5"E / 5.4/ STING 8" \ /L EXTENSION I� v / ` F ALI� IRTYlF�QQU� \ T \ PVORE TIES, ILLCn 1; /A �.B) �421 PG. 726,) � 1 JA`X \PARCEL 77-6C \ \ \ ZONING: LI WASTING V R BLE \ -WIDTH GRADNG, DRAINAGE `\ILITY EAS M �ENT, D. 3535, FIG. 536, I` �D v - S74'21'35"W \ \ S65'05'3p" \ \ 89.40 WILLOUGHBY SUBDIVISION \ WILLOUGHBY PROPERTY \ OWNER'S ASSOCIATIO INC. I \ _ C/0 REAL PROPERTY INC � TAX PARCEL 76M2-01K-D ZONING: PUD � I � I 40 20 G G 100' — I BUFFER HIC SC, 80 I� ( IN FEET ) 1 nch = 40 ft. II I I I I I III I I ;COTT/R. CULLINS'Z Lic. No. 035791 .11 1/8/21 "Ai L9 Z W W N 00 .l Q 104 LL I LL I IJ Un J 0 O O C\I z ^Q CL ,� V\/ J z 0 0 Lu Q Z 0 F1 Z 0 Z w w w a Ln JOB NO. 202193 SCALE 1 "=40' SHEET NO. 2 EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE /N ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CON7ROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWNG. A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY 7HE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY 7HE PUBLIC. A STABILIZED CONSTRUC77ON 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 STABILIZATION OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND OTHER S17E VEHICLE TRANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONS7RUC7ION TRAFFIC DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGRADING 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. 3.05 SILT FENCE & SUPER SILT FENCE.' A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND EN7RENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS W7774 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 CON7ROL 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 STABILIZATION OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.' A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT 7RAP OR SEDIMENT BASIN. USE WHEREVER STORMWA TER RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.11 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 07HIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING THE EROSION P07EN77AL BY DIVER7NG STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONS7RUC7ION TRAFFIC K1774IN THE RIGHT-OF-WAY. GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND 07HER RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR 7RAFFHC. A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG AN EAR7HEN EMBANKMENT 07H 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 774E SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE. A TEMPORARY BARRIER OR DAM W77H A CONTROLLED STORMWA TER RELEASE S7RUCTURE 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 7HE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER 774AN 774REE ACRES THERE MUST BE SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR 774E CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. STRUCTURALLY LINED APRONS OR 07HER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT 7HE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT STORMWATER OUTLETS, TO PR07ECT 7HE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWAT£R FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM 774E EROSIVE FORCES OF CONCENTRATED RUNOFF SLOW THE 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 COND177ONS. 3.31 TEMPORARY SEEDING: 7HE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY SEEDING K17H APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTA7ON BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION: TIE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E CONDI7ONS, AND ALLOWS SELECTION OF THE MOST APPROPRIA 7E PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. 3.38 TREE PRESERVATION AND PROTECTION PR07FCT70N OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAU77FICA77ON, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING ACTIVITIES. 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 HEALTH HAZARDS TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE K1774 774E VESCH. TABLE 331-A LIMING REQUIREMENTS FOR TEMPORARY SITES Recommended Application pH Test of Auriculttual Limestone below 42 3 tons per acre 42 to 5.2 2 torts per acre 52 to 6 1 ton per acre Source: Va. DSWC TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS' Rate Planting Dates 5mcies Ibs. acre Sept. 1 - Feb. 15 50/50 Mix of Annual Ryegrass (Lolium multi-florum) & 50 - 100 Cereal (Winter) Rye (Secale cereale) Feb. 16 - Apr. 30 Annual Ryegrass 60 - 100 (Lolium multi-Borum) May 1 - Aug 31 German Millet (Setaria italics) 50 SOUTH: Va. DSWC EROSION CONTROL NOTES: 1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE ORGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND WRGINIA REGULATIONS VT 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. J. ALL EROSION AND SEDIMENT CON7ROL 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 774E OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. 774E CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIW77ES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 9. THE CON7RACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF 1?0075 STUMPS, WOOD, RUBBISH, AND 07HER DEBRIS 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF T 00 AM TO 9. 00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWA TER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF 774E PROPERTY. 17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE EROSION CON7ROL INSPECTOR. 18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 9OLBS/1OOOSF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95X KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 8OLBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR. 19. MAINTENANCE.- ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED 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 SITE STABILIZA770N, 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 S17F CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION. SOIL DESCRIPTION.• SOILS ON -SITE ARE CURRENTLY AS FOLLOWS: 12E-CATOCTIN SILT LOAM-25 TO 457 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY SILT LOAM AND ABOUT 0-5" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 71B-RABUN CLAY LOAM-2 TO 79 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY CLAY LOAM AND ABOUT 0-6" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". 72C3-RABUN CLAY-7 TO 157 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY CLAY AND ABOUT 0-4" THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80". REFERENCE: WEB SOIL SURVEY ONLINE DATABASE, FOUND AT htt Websoilsurve .nres.usda. ov o WebSoilSurve .os x P �� Y 9� PPS Y P GENERAL SLOPE (3:1 OR LESS) PER ACRE TOTAL LBS KENTUCKY 31 FESCUE 128 LBS. RED TOP GRASS 2 LBS. SEASONAL NURSE CROP 20 LBS. SEASONAL NURSE CROP 150 LBS FEBRUARY 16 THROUGH APRIL ANNUAL RYE MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET AUGUST 16 THROUGH OCTOBER ANNUAL RYE NOVEMBER THROUGH FEBRUARY 15 WINTER RYE NOTES: 1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32. 2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35. PERMANENT SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.32 OF VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK, 3RD ED.) 1. SET POSTS AND EXCAVATE A 4"X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS. -Z � - FLOW - ��,Ii1�- ,,I 4 J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 2. STAPLE WIRE FENCING TO THE POSTS. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. i / / _ I �� �, _ 111: ��� -III FLOWI -III- I I I ��-III_I1_ � -III-I 111-III- I I1- ,I, =1T - I _ III-ITT111111111111- EXTENSION OF FABRIC T FENCT THE TRENCH. ssF WITH WIRE -BACK os- NO SCALE 1992 DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE. (Li H CFG CONTROL MEASURES: PROJECT DESCRIPTION. I�, THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO CONSTRUCT AN INDUSTRIAL BUILDING AND ITS CORRESPONDING INFRASTRUCTURE. THIS PLAN PROPOSES EROSION AND SEDIMENT CONTROL MEASURES: 6.30 cc. OF LAND DISTURBANCE. THE PROJECT WILL BEGIN ITS CONSTRUCTION WITH THE PROPOSED ESC MEASURES FOLLOWING PLAN APPROVAL, WHICH IS �' IT IS ANTICIPATED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION, DIVERSIONS, A ANTICIPATED TO BE IN THE SUMMER OF 2021. THE WORK IS ANTICIPATED TO BE COMPLETED WITHIN 24 MON774S AND TO CONCLUDE IN THE SPRING OF 2023. . LLINS� SEDIMENT BASIN, A SEDIMENT TRAP AND SILT FENCES TO CONTROL SURFACE DRAINAGE. TEMPORARY EXISTING SITE CONDITIONS" . 035791 I SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY THE PROPOSED DEVELOPMENT IS LOCATED ON A PARCEL WITH EXISTING DEVELOPMENT. THE EXISTING DEVELOPMENT CONSISTS OF A PAVED ROAD, EXISTING GRAVEL STOCKPILE AREAS SHALL BE DISCUSSED WITH THE ESC INSPECTOR AHEAD OF TIME &WILL NEED TO BE PARKING AREAS, COMPACTED DIRT ROADS, ABANDONED VEHICLES AND MISCELLANEOUS OTHER STRUCTURES THAT HAVE BEEN ABANDON. SURROUNDING THESE 8/Z1 „cy'�'� 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 CONSTRUCT70N ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR AREAS ARE OPEN SPACES WITH TREES AND LIGHT UNDERBRUSH. THIS SITE IS GENERALLY SITUATED ON A RIDGE, AND DRAINS TO THE NORTH, SOUTH & WEST. THE RIDGE IS GENTLY SLOPE AND THE PERIMETER SURROUNDING THE EXISTING DEVELOPMENT lS GENERALLY MORE STEEP. THE SITE AS A WHOLE IS WELL DRAINED. ADJACENT AREAS." THIS S17E IS BORDERED TO THE EAST BY APPROVED SDP 2018-10, AND BY MOORES CREEK TO THE SOUTH, WEST AND NORTH. SILT FENCE WITH WIRE BACKING, DIVERSIONS, A SEDIMENT BASIN, A SEDIMENT TRAP, INLET CONTROLS AND VARIOUS OTHER ESC MEASURES ARE PROPOSED TO LIMIT THE P07EN77AL FOR CONTAMINA77ON OF THESE ADJACENT PROPER77ES AND WATERWAYS. APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT OFFS17E LAND DISTURBANCE. - DORMANT FOR MORE 774AN SEVEN DAYS. THESE AREAS SHALL BE SEEDED W1774 FAST GERMINATING OFFSITE LAND DISTURBANCE IS LIMITED TO PUBLIC RIGHT-OF-WAY AND EASEMENTS VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL SOILS" DEPEND ON THE TIME OF YEAR APPLIED. THESE MEASURES, AND THE FOLLOWING ARE PROPOSED: SEE SOIL DESCRIPTIONS ON THIS PAGE, AND THE PHASE l ESC PLAN FOR THE BOUNDARIES. CRITICAL AREAS: 3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PARTICULAR AREA. EXISTING STEEP SLOPES AND MOORES CREEK ARE LOCATED AROUND 774E PERIMETER OF THIS SITE. THE STEEP SLOPES ARE PREDOMINANTLY PRESERVED AND THE DOWNGRADIENT MOORES CREEK IS NOT PROPOSED TO BE IMPACTED FROM THE DEVELOPMENT. THESE AREAS ARE CONSIDERED TO BE CRITICAL AREAS. THE 3.02 CONSTRUCTION ENTRANCE - TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON 7HEM OUTSIDE THE SCOPE ROADS BY MOTOR VEHICLES OR RUNOFF. OF THE PROPOSED PLAN. TREE PROTECTION FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT ]RAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN 3.03 CONSTRUCTION ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY LAND DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED. CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT REGRADING OF PERMANENT SEQUENCE OF CONS77?UC770N: ROADBEDS BETWEEN THE TIME OF INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD 1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A PRE -CONSTRUCTION MEETING. STABILIZATION WILL BE APPLIED TO THE CONTRACTOR PARKING & STAGING AREAS AS NEEDED. 2. PRIOR TO DISTURBANCES, 774E LIMITS OF DISTURBANCE SHALL BE FLAGGED AND 774E TREE PR07ECTION FENCING SHALL BE INSTALLED. z O � 3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS. J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCT/ON PROCESS WITHOUT 774E APPROVAL FROM THE INSPECTOR ON THE PROJECT. 4. INSTALLATION OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. THE CONTRACTOR SHALL APPLY CONSTRUCTION ROAD STABILIZATION AS F a k 'AON 3.07 STORM DRAIN INLET PROTECTION- INLET PROTECTION IS PROPOSED ON INLETS, WHERE SHOWN ON NEEDED TO 774E SURROUNDING AREA FOR THE CONTRACTOR PARKING & STAGING AREA. CONTRACTOR SHALL ENSURE THE CONSTRUC77ON ENTRANCE AND V) u THE PLANS. PARKING AREA ARE PROPERLY GRADED AND DRAIN TO AN ADEQUATE E&S MEASURE. THE CON7RACTOR SHALL UTILIZE 774E NEARBY SEDIMENT TRAP FOR to z w 3.09 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TO DIRECT RUNOFF VEHICULAR FLASH WASH OFF. CONSTRUCTION ENTRANCE TO BE INSTALLED WHERE CONSTRUC77ON VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, O In INTO A SEDIMENT TRAPPING DEVICE. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) 7RACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS z0 O 3.11 RIGHT OF WAY DIVERSION- A RIGHT OF WAY DIVERSION IS PROPOSED AT THE CONSTRUCTION TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM .� P ENTRANCE. THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER II z SEDIMENT IS REMOVED IN 774/S MANNER. 'w (n 3.13 SEDIMENT TRAP- A SEDIMENT TRAP IS PROPOSED WHERE SHOWN ON THE PLANS. 5. THE INITIAL ESC CONSTRUC770N MEASURES, AS SHOWN ON THE PHASE I EROSION & SEDIMENT CONTROL PLAN, SHALL BE INSTALLED NEXT. THE CON7RACTOR 3.14 SEDIMENT BASIN- A SEDIMENT BASIN IS PROPOSED WHERE SHOWN ON THE PLANS. SHALL BEGIN BY INSTALLING THE PERIMETER SILT FENCE. PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ICI 3.18 OUTLET PR07EC77ON-OUTLET PROTECTION IS PROPOSED AT THE OUTLET OF PIPES. ANY LAND DISTURBANCE AC77WTY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 3.19 RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES. 6. ONCE THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE MEASURES, THE CONTRACTOR 3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED WITH THIS PLAN. SHALL PROCEED TO LIGHT CLEARING OF THE SITE. THE CON77?ACT0R SHALL BEGIN BY CLEARING THE AREAS REQUIRED TO ACCESS THE LOCATIONS OF Uj 3.38 TREE PRESERVATION AND PROTECTION- TREE PR07EC77ON IS PROPOSED WITH THIS PLAN. SEE THE SEDIMENT TRAP A', SEDIMENT BASIN B' AND THE AREAS DESIGNATED AND/OR APPROVED BY THE INSPECTOR FOR CUT REQUIRED FOR THE TRAP's AND �/ BASIN's INSTALLATIONS. INSTALLA7ON OF SEDIMENT TRAP A' & SEDIMENT BASIN B' SHALL IMMEDIATELY FOLLOW THE SELEC77VE CLEARING. FOLLOWING THE li ESC PLAN FOR THE REQUIRED LOCATIONS. INSTALLAT70N OF THESE MEASURES THE CONTRACTOR SHALL INSTALL THE DIVERSIONS. THE DIVERSIONS SHALL MAINTAIN POSITIVE DRAINAGE TO THE 3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED WITH THIS PLAN. SEDIMENT TRAPPING DEVICES AT ALL TIMES THROUGHOUT CONSTRUCTION. ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE PHASE l EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME. MAINTENANCE. 7. ONCE ALL THE PHASE I EROSION CONTROL 17EMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO THESE MEASURES AND THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF THE SITE, REMOVING ABANDON VEHICLES & IN GENERAL, DURING CONSTRUCTION 774E RLD OR CON7RACTOR ON -SITE WILL CHECK ALL EROSION AND STRUCTURES AND DEMOLISHING EXISTING AREAS AS NEEDED. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS SEDIMENT CON7ROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL REQUIRED. BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS & AFTER CLEARING THE PROPOSED AREAS, THE CONTRACTOR CAN PROCEED TO PHASE 11 OF THE EROSION & SEDIMENT CONTROL PLAN. UPON INSPECTOR a. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE APPROVAL, THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE SI7F TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION & SEDIMENT CONTROL PLAN. THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. VAST MAJORITY OF THE RETAINING WALL CONSTRUCTION SHALL ALSO OCCUR IN ESC PHASE Il IWH THE GRADING OPERATIONS THE CONTRACTOR SHALL FILL THE AREAS b.ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT SURROUNDING THE RETAINING WALLS IN A MANNER THAT ENSURES THE FILL LOCATIONS ARE LEVEL VERTICALLY AT THE END OF EACH WORK DAY. SUCH A PRAC77CE WILL LIMIT , PROPER DRAINAGE IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CHANNEL FLOW AND PROMOTE SHEET FLOW TO THE ADJACENT DIVERSIONS & SEDIMENT CONTROL DEVICES. WORK ASSOCIATED WITH THE RETAINING WALLS SHALL OCCUR ON � CLEANED, OR IT WILL BE REPLACED. THE TOP SIDE TO REDUCE P07EN77AL IMPACTS TO THE DOWNS7REAM AREAS. THE DIVERSIONS ADJACENT TO THE RETAINING WALLS SHALL PR07ECT THE WALLS BY CHANNELING 00 c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE RUNOFF AWAY FROM THE WALLS AND TOWARDS THE SEDIMENT TRAP & BASIN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP ' FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT W1774 ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. 9. ONCE THE RETAINING WALLS ARE PREDOMINANTLY CONSTRUCTED, 774E PHASE ll DIVERSIONS ARE COMPLETED & ARE OPERATIONAL AND THE SITE IS ROUGH d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. GRADED, INCLUSIVE OF THE BUILDING PAD AND 774E EASTERN CHANNEL TO THE WEST OF 774E BUILDING's PAD DIVERTING RUNOFF TO SEDIMENT BASIN B', 774E IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD OR CONTRACTOR CONTRACTOR MAY ELECT TO INSTALL THE SANITARY SEWER IMPROVEMENTS AND 774E LATERAL EXTENSION. AT THIS TIME, THE CONTRACTOR MAY ALSO ELECT ON -SITE THE RLD's CONTACT INFORMATION CAN BE FOUND IN THE SWPPP, WHICH IS TO BE LOCATED TO APPLY THE BUILDING's STONE SUBGRADE FOR ADDITIONAL ESC COVERAGE. THE TIMING OF THE CONSTRUC77ON OF THE SANITARY SEWER IMPROVEMENTS & ONSITE AT ALL 77MES DURING CONSTRUC770N. IN ADDITION, THE OWNER MAY BE CONTACTED. UPON THE BUILDING's STONE SUBGRADE WILL ULTIMATELY BE DICTATED BY THE CONTRACTOR AND HIS SCHEDULES. DUE TO THE NATURE OF THE PROPOSED COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR S17E MAINTENANCE. PERIMETER ESC MEASURES, IT IS POSSIBLE THAT THE CONTRACTOR MAY ELECT TO DELAY THE CONSTRUCTION OF THESE TWO ITEMS UNTIL ESC PHASE Ill. EROSION CONTROL NOTES: 9. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE PHASE lI EROSION CONTROL PLAN. TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED. ES-1: UNLESS 0774ERWlSE INDICATED ALL VEGETA7VE AND STRUCTURAL EROSION AND SEDIMENT CONTROL 10. ONCE ALL THE PHASE IH EROSION CONTROL 17EMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO THESE MEASURES, AND 0 � THE ESC INSPECTOR HAS GRANTED APPROVAL, THE CONTRACTOR CAN BEGIN PHASE 111 OF THE EROSION &SEDIMENT CONTROL PLAN. PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND 12. THE CONTRACTOR CAN BEGIN INSTALLA7ON OF THE UTILITIES, CURB AND GUTTER, AND PAVED ROADS/PARKING LOTS. INLET PR07FC77ON SHALL ALSO BE � SPECIFICATIVIONS OF THE IA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS UR 625 EROSION AND SEDIMENT CONTROL REGULATIONS 00 EROSION INSTALLED AS THE STORM SEWER IS CONSTRUCTED. INLET PR07EC77ON SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS 1"i ES-2. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION NEEDED. IF THE STONE FILTER BECOMES CLOGGED WITH SEDIMENT SO THAT IT NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE 0� CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE PULLED AWAY AND CLEANED AND OR REPLACED. TO PROLONG THE LIFE OF TEMPORARY SEDIMENT BASIN B' THE FINAL CONSTRUCTION SHALL BE DELAYED / (N WEEK PRIOR TO THE FINAL INSPECTION. FOR THE SOUTHWEST PARKING AREA &THE PERMANENT STORM SEWER &INLET PARALLELING 774E SOUTHERN DRIVE A/BCE's CURB. THE DOWNSTREAM MOST ES-J.-ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST DROP INLET & ITS SURROUNDING PIPES SHALL BE DELAYED AS NOTED IN THE ESC PHASE HIl PLAN. A TEMPORARY MANHOLE OR JUNCTION SHALL BE SET � STEP IN CLEARING. ALONG THE PERMANENT STORM SEWER TO INTERCEPT ITS RUNOFF AND DIRECT IT INTO A TEMPORARY CUP. THIS ESC PHASE N TEMPORARY CUP WILL DIRECT IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII" ) ES-4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE RUNOFF INTO THE STILL FUNCTIONAL SEDIMENT BASIN B'. � S17E AT ALL TIMES. 13. TOWARDS THE END OF ESC PHASE Ill, AND AFTER ALL 07HER PHASE III ESC MEASURES HAVE BEEN INSTALLED, THE CONTRACTOR SHALL OBTAIN APPROVAL FROM THE ESC ES-5.-PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE INSPECTOR FOR 7HE REMOVAL OF SEDIMENT BASIN B: FOLLOWING THIS, THE CONTRACTOR SHALL REMOVE SEDIMENT LADEN MATERIAL, INSTALL UNDERGROUND DETENTION 0! PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), 774E CON7RACTOR SYSTEM B' LOCA7ED Wl7HIN SEDIMENT BASIN B's FOOTPRINT &BACKFILL THE AREA W77H STRUCTURAL FILL. CONTRACTOR SHALL THEN COMPLETE THE INSTALLA770N OF THE ( ) C I SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. FINAL 20't OF 7HE ADJACENT RETAINING WALL, 7HE FINAL DROP INLET AND ITS ADJOINING STORM SEWER AND 7HE PARKING LOT IN 7HE SW CORNER. THE CONTRACTOR ES-6: 7HE CON7RACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL SHALL PAY SPECIAL ATTEN770N TO THE SILT FENCE BENEATH THIS AREA AT THIS 77ME AND ENSURE IT CON77NUES TO BE EFFECTIVE. MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN 14. ONCE PHASE Ill OF CONSTRUCTION IS COMPLETE, THE S17E IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN COORDINATE THE I I I (� APPROVING AUTHORITY. TIMING OF THE CONVERSION OF SEDIMENT TRAP A' TO A PERMANENT SWM FACILITY. 774E CONVERSION OF SEDIMENT TRAP A' SHALL ONLY OCCUR AFTER ESC W CD ES-7.-ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON7ROL MEASURES AT ALL TIMES APPROVAL. O-) DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS 15. FOLLOWING THE CONVERSION OF SEDIMENT TRAP A' TO A PERMANENT FACILITY, AND THE INSTALLATION OF UNDERGROUND DETENTION SYSTEM B' THE N ACHIEVED. CONTRACTOR CAN REMOVE THE REMAINDER OF THE EROSION &SEDIMENT CONTROL MEASURES. NO ITEM SHALL BE REMOVED THROUGHOUT ALL PHASES OF W CN ES-B.-DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING CONS7RUC770N, UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION DEVICE. 16. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH PORTION OF THE SITE. TEMPORARY SOIL STABILlZA770N SHALL BE APPLIED Wl7NlN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN 774E WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED 70 AREAS THAT ARE TO BE LEFT Q EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. > z DORMANT FOR MORE THAN ONE YEAR. raaaa FAI19IX: 17. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED /N 774E VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING cm a- COMPACTED SOD. 9' YntIYUY . ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE WRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. W 18. ALL TEMPORARY EROSION AND SEDIMENT CON7ROL MEASURES SHALL BE REMOVED W/7H/N 30 DAYS AFTER FINAL SITE STABILIZA7ON OR AFTER 774E �__ - _ _ - _ _LIII� I TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY 774E LOCAL PROGRAM ADMINISTRATOR. 7RAPPED SEDIMENT AND 774E � L -�III =-I �1��L�LIFI�I�IFITII to"�_ i�ii�ii=IIIIII i�G;;! ilrii�riii�ii i�ri�riiT-III-1 DISTURBED SOIL AREAS RESULTING FROM THE D/SPOSI770N OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. 3.05 1992 CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A 47X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6'MAX. / I / �� _ -I i � 1 � III tzow - 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) Source: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control Sherwood and Wyant e' ytN DD TEMPORARY 18" DIVERSION BERM TEMPORARY RIGHT-OF-WAY DIVERSIONS VDOT #1 COARSE AGGREGATE ,a:, )LT. - - I - 6• MINIMUM TYPICAL GRAVEL STRUCTURE COMPACTED SOIL llj. uIN I 6. lA1mMUM TYPICAL EARTHEN STRUCTURE Plate 3.05-2 Source: Va. DSWC 3.11 Pared construction entrance for erosion control plans Plate 3.11-1 15-17,6, zeri..�Ize'..;,',-e .�'.._e1.._�'w._0,.-;1i.;1M1 11 � ._.1nZ1,t1W=� .� V�,�/" ,�,�,��,! . ':67 � , L ��o' A , - ,r 2z ' �zx ASPHALT PAVED IYASHRACK 1 2% 12' III I�POSITIVE DRAINAGE -MUST EXTEND FOLL WIDTH L-.-0 TO SEDIMENT ]T INGRESS AND EGRESS TRAPPING DEVICE JPERATION PLAM 12' MIN. FILTER CLO'N EXIST'NG PA%V l M- IHIVE DRANAOI SEDIMENT PIPING DEVICE A nunninmt wait[ lap of I inch mu't be wAAcd wtlh a nwalwan 1 Inch balkoc l >hulott cah a stgtphnig a wash h"e NIWI a that tc'lel ul 1 ' mchc� lot adecpult LoaJml ptes:-tMe. 11'asll Watel altil be tamed au%,i% huul Wle ettUalce to al appt ol-etl ..aeNluue ai ea to I euol'e Aetluueld .all .<eilaaeill AhaB be pl ecented 8xm culet11Y slotm dlatos. ddches of walacMMFess PAVED WASH RAC4C 1992 3.38 Source: Va. DSWC Plate 3.38-2 0 U� W z� Q U Ul \<� L_ J zU�� I- IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII LLI U JD" U% ttllllllllll U z a _j J m L:;� 0. r ui S 0 (L� V / 06 (� / V <N z L.L Q� J z 1- 4 0 D W �\ I W O J z a o � U) z D O C) z w I. -I G LL W Z O 06 z U p z o Oof Uj I- w w JOB NO.� 202193 SCALE N/A SHEET NO. 3 Lic. No. 035791 � PROPOSED SAFETY F NE / ' �-INSTALLSIGNS"WARNING -/" QUICK SAND, KEEP OUT s. \ i _ - SIONAL E� �� - s4� \ II PROPOSED SF WITH - ROPOSED TREE P - - u 5" \ S WIRE BACKING / / PROPOSED 18" DIVERSIO�'PROTECLION ,�' i ,- CONTRACTOR SHALLyENSU- —,3 cJ q-� POSITIVE SLOPE ISf4AINTAINED. p ■ I T'A/— / \ BERM SHALL BE -STABILIZED AS �j— / / A 7 T STEP IN DISTUR-BANC€�6O st ■ " PROPOSED LI S ss i PROPO SfWITHT � / � \ - --�- -- - � � /� / i / yse _ / /_ _ \ \ i ��O / � DISTURBANCE- / l Y S / BACK G / / � � u � � 1 . � > � i/ � COIN IDES WITH zu�su PROPOSED CONTRA S / - - —� S 7O i PROPE TY LJN /- - PARKING & STA G / ����/ �s 3 �� - MANAGED STEEP i / / /s A A / E IX STING TREELINE. CLEARING GRADING C�TIGITIES Ii� r ri SLOPES, TYP.- ESC PHASE I SHALL`BE LIMITED TOT SE NECEgSA�Y' /FOR THE INST TION OF THE ES jiASE I M�ASUR j5 /i/su // / r s � ,PROTECTION- TP s _ _ I Z i O J / / / , ' ■ - r i \ �OPO�S D CONC WASHOUT�A1�EA 0 / CONTRACTOR SHALL INS, ALL AN r r r r / .� � - -376- -0--- _ / `� J / \ \ PROPOSED'CONSTRUCTWN ACROSS -THE CONSTR CTION ENTRANCE. � m c�5 r �r / r /�� �\ \ V ASPHALT PAVED R/W IVERSION U � r / _ ENTRANCE SEDIMENTTRAP / / w � TO PTURE-FCAS / �' O -RUNO `F FROM WASH CK . / s I _ I 'I PROPOSED PAVED NI, O O Q ZX ENTRANC MIN.) W/ WASH RACK & DOWN GRADIENT DIVERSION > Z / r r s _ss ssF s� / •� _ 37 6- \ \- sf J & SEDIMENTTRRPPING DEVICELu PROCII ,POSED BAFFLES / r r / - r - - ? /A .. / PROPOSED SAFETY`FENCE;,���, �� . \ \ \ ssF- f --ss sse " " _ - -'4e il\ f V~, �A INSTALL SIGNS "WARNING r / / r / . _ .. . \ _\ \ - � O\\] rQT1ICK SAND, KEE OUT" r / r / \ - -� E STING PAVED ROAD, TYP. �� Lu / PROPOSED LIMITS ce OF DISTURBANCE, ESC PHASE I /\� 6.30 ac. TOTAL. � _ \ � SED. TRAP 'A' � \- - - - - J " ' � ✓ I j E ,_ _-- I- ---- ---- ��... /A THE FUELING TANK SHALL BE COMPLETELY SURROUNDED BY A 2' . - - LOCATION OF DEEP, 2' WIDE EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE .. ( /r I "ky\ . i XISTIfyG-GRAVEL _ _ _ - - - - FUELING AR _ - LINING, OR BE PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. r4 (6 \ 1 • _ - - RKING AREA , - - ao 8, . -PA '\ " f THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE I i \ • / TYP. - \ EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. ROPOSED:STOCKPILE URROUNDED BY ESC PHASE I . S FENCE SED. BASIN 'B' ij 3.16 ac. 41# 4_ LOCATION OF r LOCATION OF 1 �� ! / 15cy DUMPSTER PORTA-PO TTIES SOIL TYPE 7-113- ��■■■■ r �39$ — \� / — I / r7 SOIL LIMITS, ■ ■ • / • •■ ■ ■ ■ `-✓ - - - - - /\ �\ N Al 0— � SOILTYPE �i� \ \ PROPOSED TREE \ \ ��. PROTECTION TP A �� - EXISTING PAVEIf-. %\ 8 / Y / Oy J\ ROAD, TYP. N v A 1 A �*Air PROPOSED 18" DIVERSION. _j \ POSITIVE SLOPE IS MAINTAINED. D \ 1 A 100 YR Alpd \ f \ \ `\ \ r�C \\ < Q O \ \BERM SHALL BE STABILIZED AS ` \ NiISOI 2E AE \ / \ 1 1 / r S ( � ..� . (}� A FIRST STEP IN DISTURBANCITS OF FEM E. \` FLbODPLAIN, TYP. V� • 3� l r ♦�� • i LLB O vPRESERVED�, •� • / STEEP SLOPES / � I j i I ■ � ■ ■ � CLASSIhtD AS MANAGED _ - PRO pOSED NSF WIT \ P @ASE9 0 ■ ■ • ��• J U \ \ \ \ SLID �S ON - WIRE BACKIN S �, J \ I r} I I I I \ ■ ■ ■ • �� / �- vNiOPO ELEVATIONS, i �� I ` O (f `+ ` ISTURBANCE COINCID SOIL TYPE r f— \ P[Y LINE 12E O Lu 06 Eo ----- ■■ \ ■ 'LU \ � - � � � A �� � � � � � \ \ r _� , �� � �� � � � � � � L.L. \ _ - — - _--------- , Z oC �EUFFER. TYP._ -- -- PRESERVE / \\ - __ _-- — ------ / LLI ill LLI Cn - -------------- _----- ,�� _ -J ;� 350— ` \ LIMITS OF �350 - �I O \ STREAM, TYP. V - I � 0 0 w � MOORES CREEK � w O d 2 � � d V) JOB NO. _ 202193 -� GRAPHIC SCALE SCALE - \ go o is 30 60 1 =30 11 I I ME El El El ME USES USES _ \ IN FEET ) 4 / 1 inch = 30 ft. / _ bb ROPOS`E Af€TY FEN ( / -PA-INSTALL-SIGNS "WARNING.-000� �� \ �� •�_ ������� 1'-.�� •� �.������.1 ��`� •� ������� ram. � �•��, ���� 1� 1�� oa,,vil•n. UU,�.l,lo � U Lic. No. 035791. 1�8,121 �4 SSIONAL EGOS V7 C� PROPOSED LI- '/� / OF DISTURBANCE- �� Z5, IWCIDES WITH PROPOSED CONTRACTOR - MANAGED STEEP / PROPE TY UN /= - -PARKING & STAG s / SLOPES, TYP. ROPOSED TREE CONz _ TRACTOR SHALL INSTALL DIVERSIONS ,PROTECT[/O91- TP ! _ - _ / UPLAND (AND OFFSET FROM) THE '�� i ' / - / - 1, O RETAINING WALLS TO ENSURE RUNOFF PROPOSED CONC I _ Q DOES NOT EXIT THE PROPERTY, AS SHOWN. WASHOUT. AREA ss-� I CONTRACTOR SHALL INS: ALL AN ASPHALT PAVED R/W IVERSION U 2: \ PROPOSED'CONSTRUCTIOIV / I ACROSS -THE CONSTR CTION ENTRANCE. In co ENTRANCE SEDIMENTTRAP w => \ \ PROPOSED 18" DIVERSION TO CAPTURE-FCAS sF� z Ln \ CONTRACTOR SHALL ENSURE - -- -RUNOFF FROM WASHRACK -"s` I PROPOSED PAVED NSTRUCTION O O Q \ \ \ POSITIVE SLOPE _IS MAINTAINED. D - - _. - / s' _ _ - _ I CE ENTRANCE (12'x MIN.) W/ WASH - F- \ A FIRST STEP IN DISTURBANC s _ ssF J s.- ` & SEDIMENT DOWN GRADIENT DIVERSION j Z BERM SHALL BE STABILIZED AS / g _ RACK MEOWN GRADIENT DEVICE y� z E STING PAVED ��� ROAD, TYP. Lu \ \ •;. i I PROPOSED LIMITS qw I OF DISTURBANCE, —� — At EMIR �-- - - - THE F M UELING TANK SHALL BE COMPLETELY SURROUNDED BY A 2' / \ LOCATION OF DEEP, 2' WIDE EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE FUELING AREA LINING, OR BE PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. - ESC-RHASE II f \ THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE SED. TRAP'A' \\ \ EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY 0.82 aa. - ' O \ IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. �_ _ LOCATION OF LOCA N 0 ��'� 4w 15cy DUMPSTER PORTA- TTI S �♦ A�� o 0 0 0 �� ♦♦♦♦� `39�♦♦ e o 0 0 *1 ` 41#. - LL N w ��♦ ♦ —3 4 r �C_ 0 0 Lu 0 0 I Lu In TREETP \ . _ \\ \ / -3g6. _ ,� \� \ i /1 PROTECTION \ o e - �, ->\ \ \J � Ps r Z -__,j EXISTING PAVED Q ROAD, TYP. N I o 0 o W J v ♦ / r \ 0 PROPOSED 18" DIVERSION. CONTRACTOR SHALLENSURE \ 1 \ \ o \ ,POSITIVE SLOPE IS MAINTAINED. D \ \ �� \ \ ` ' S ESC PH E II BERM SHALL BE STABILIZED AS ` _ - • Q Z \ IMITS OFF MAioo YR \ \ SED. B SIN 'B' A FIRST STEP IN DISTURBANCE. \` FLOODPLbIN, TYP. \ --- •�. ` \ \ \ \ o o ' i 4.1 ac. Q \ \ \ I/ _ IULI P ESEkVED STEEP SLOPES �/ -- s I Z_ W J `\ CLASSIF\IED AS MANAGED _ - pROPOSEED F WIT o o - - - o P @ASE9 S o ` �' i W \ LO S ON FIELD WIRE BACKIN v v �NTOPO ELEVATIONS,_ _ PROPOSED LIMITS 0 L11Ld � T--- ------ COINCIDE$ �� A A � Lu - G`' PtY LINE �. \ \ \ \ 5 \ Lu TS v Q 0L W 9Lu tFs Ld �� ■ r ssr ssr �\ - / - — W--SMGP - CAD, TP\Ln UFFER, TYP. PRESEDiSTF�EP� -__A, _ �A _ - _-_-- - 8--------�� � � � Ld Ld ESCPH EII �' ��\� - __ _ --_ _ - - - _���� -- �--- ;; /i _ -_ Cn SED. B SIN'B' • - - - - - - — - - - _ _ - / Lu WAi li Lu LLJ In- LIMITS OF �35 - JI _ 0 STREAM, TYP. v ,J — — _ N H r L W \ / MOORES CREEK w K 2 � � d V) \ - - JOB NO. 202193 i — , GRAPHIC SCALE SCALE 9 130' 30 ° i5 30 60 _ IN FEET ) EET N 1 inch = 30 ft. 5 U Lic. NO. 035791 / — / / \ / 'O� ROPOS`E SD AFE•TY F NE 1/8/21 / INSTALL -SIGNS "WARNING OS ' QUICK $AND, KEEP OUT'j s' \ i _ - IONAL F, /- - \ PROPOSED SF WITH -WOTECiION E P ��� F_ ___ sr _a` ss`\\ \I S WIRE BACKING / - ' i 17 PROPO SfWITHI- J � / BACK3NG / / /- "'. \ \ i'/� DISTURBANCE •. Z5, IWCIDES WITH �' PROPOSED CONTRACTOx �PROPE TY LIN /= - - PARKING & STAGING MANAGED STEEP i ' � s � TOWARDS THE END OF ESC PHASE III, THE i / i �- - "`� A SLOPES, TYP. / O/ / A A \ CONTRACTOR SHALL OBTAIN APPROVAL FROM THE ESC -- INSPECTOR FOR THE REMOVAL OF SEDIMENT BASIN B'. / / / - �A ,� ROPQSED TRt FOLLOWING THIS, THE CONTRACTOR SHALL REMOVE i / ' / _ .� PROTECTI0 / SEDIMENT LADEN MATERIAL, INSTALL UNDERGROUND i _ _ _ ,�� i ! /s - z DETENTION SYSTEM (LOCATED WITHIN SEDIMENT, v - \�\ \ \ WAS OUT.AREA ==F BASIN TB'sR FOOTPRINT) & BACKFIC THE AREA WITH ' �� PR OS D CONC. �CONTRACTOR SHALL INS. ALL AN u \ Ff � STRUCTURAL FILL. CONTRACTOR SHALL THEN /� � � \ � � -. \// � COMPLETE THE INSTALLATION OF THE FINAL 20'f OF i DC W ASPHALT PAVED R/W IVERSION U f \ \ ACROSS -THE CONSTR CTION ENTRANCE. Lu Co THE ADJACENT RETAINING WALL &THE PARKING LOT. ' �� / - % \ / z w Ln / \ ESC PHASE III IP _ - j. Z 9 i / A \ ` \ - / PROPOSED PAVED NSTRUCTION Q SED. TRAP 'A' O �� \ ENTRANCE 12'x MIN. w/ WASH H v 0.61 ac. RACK & DOWN GRADIENT DIVERSION > z - 6 - SEDIMENT TRAPPING DEVICE PRO BAfFLES " i i 3% & SE PROPOSED 5AFE,T�l FENCE; � _' �\ / j-] / ��� IP \ -ss - _ssF (A INSTALL SIGNS"WA"G s �//- ,QWCK SAW, KEEKOUT" .. � `P INTERIM END OF PAVEMENT O"RAVEL SUBBASE \ \ V Ik W UNTIL SEDIMENT BASIN 'B' IS REMOVED. PROPOSED LIMITS i OF DISTURBANCE, 6.30 ac. TOTAL. CONTRACTOR SHALL INSTALL THE FINAL PORTION OF THE PARKING LOT'IRTHE SW CORNER AFTER SEDIMENT BASIN\'' IS FILLED & UNDERGROUND DETENTION SYSTEM 'B' IS CONSTRUCTED. � _ - / _ Ip a THE FUELING TANK SHALL BE COMPLETELY SURROUNDED BY A 2' _ _ - _ LOCATION OF DEEP, 2' WIDE EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE .. INTERIM END OF PAVEM�NT OR GRAVEL SUBBASE `�� _ _ ING AREA - i -�A. LINING, OR BE PLACED IN AN IMPERVIOUS OPEN -TOP DUMPSTER. N ■ / \ UNTIL SEDIMENT BASIN B,IS REMOVED. THE PROPOSED BERM OR DUMPSTER SHALL CONTAIN FUEL IN THE ■S \ / EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. a LOCATION OF v r.-� , _ LOCATION OF PORTA-POTTIES _ \ i 15cy DUMPSTER I/ ` LL W �ssF� � -,%�V� � ate: , -. .. � � I I I � � � ■ � E� / r .,� � � I � � a N - 1 _ Q W PROPOSED TREE - _ V 96 W PROTECTION TP �� \ a ��- V1 \ v CONTRACTOR -SHALL SET A TEMPORARY MANHOLEOR \ \ STJUNCTION INTO TEMPTTHEPERMANENT _ _ \ STORM SEWER INTO TEMPORARY SEDIMENT BASIN 'B' VIA A TEMPORARY 22' 018L�IP. THE \ \ \ \ 38 P CONTRACTOR SHALL REMOVE THESE TEMPORARY N STRUCTURES AT THE TIME OF SEDIMENT BASIN , \ \ \ _ ` \ / "� �� _ _ � B'SIN TALLATREMOVAL & COMPLETE THE STORM SEWER ` PORTION OF PERMANENT�J�n R \ \ ' r \ \ \ / ' - \ / l "o \ INSTALLATION DIRECTING RUNOFF INTO THE EWER TO BE CONSTRUUCTED \ 1 � \ \ ` ��. / 1 \ N J � UNDERGROUND DETENTION SYSTEM 'B'. � '� � ` ~� O 1 �V A I NilTS OF FEMAioo YR �� v / AV i u " i - `FLOODPLAIN, TYP. ESC PHASE III v/ MCA V I I A W LLJ Ph�SEkVED STEEP SLOPES SED. -BASIN 'B' U CLA,SSIF�I�D AS MANAGED_ _ - PRO SF WIT - IP� 5.06 ac. I I \ O \ �LOPES @ASEg ON FIELD WIREBACK3N S _ Ln / i W Z v v N i0P0 ELEVATIONS,_ T U 2 �� ' U� W TYP / ` Ld PROPOSED LIMITS OF' - 4 \ f \----- ---- \\ W \ \ \ �+ �'y�ISTURBANCE COINCIDES - - _ A I / W F P� LINE ��� - 1 1 / V1 TS � z \ \ P �L ,,.,l// Lu _ _ _ Ld / sr , ssr ss. ssr F / � _ —_-_-- — - - - - - -- (n —BUFFER— P P I S U LIMITS OF / / ' \ - _ ` i _ \ - — - - - - - - - - �- Q DISTURBANCE i / �' ' ` �_ ` - - - - PRESER-VEDiSTF�EP� - _ \ - - ` - - - - - - - - W COINCIDES WITH I / / , ` �� _ _ Eg�Typ , , %�, _` \ \ -_ _ _ ;� - 3H� - ' - i , ' W 1 PUBLIC UTILITY ESMT. V _ -- WIRE _ - ' \ S PROPOSED SF WITH ( -� �� _ �� / BALKING I - - - - - - --��/�,� - A A A- - _ - -- _ Cn � I LLJ LLI VVA C QLLJ O \ f \ . . Vl i .• ` �`�::\ STREAM, OTYP. \ \/ �350 _ J I 0 �9 �- \ w ,� � Z _ - - 2 MOORES CREEK i _ W - i ` JOB NO. IP � 2 V) Lu v - _ r 2 � / 202193 Lu GRAPHIC SCALE SCALE I - "'°�W - - , ' \ 30 o i5 30 60 11I_ 30 ' IN FEET ) SHEET O. N 1 inch = 30 ft. 6 1992 3.07 GRAVEL CURB INLET SEDIMENT FILTER Rr psi:% rjt� eee rLc/.>r GRAVEL FILTER 12' RUNOFF WATER WIRE MESH FILTERED WATER e �I Ir a SEDIMENT CONCRETE GUTTER 72" CURB INLEr SPECIFIC APPLICATION THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. • GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. Source: Va. DSWC Plate 3.07-6 1992 3.01 SAFETY FENCE PERSPECTIVE VIEW PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE Source: Adapted from Conwed Plastics and VDOT Road and Brame Standards Plate 3.01-1 Subarea Summaries to Sediment Trapping Devices ST W SB W ESC Phase 1 0.43 3.16 ESC Phase 11 0.82 4.13 ESC Phase I11 0.61 5.06 Sediment Basin 'B' Design drainage area (acres) 5.06 basin Volumes: (using 2' contour intervals) elevation (ft) contour area (sf) volume(cy) 362.00 2072.0 0 364.00 2941.0 185 366.00 3914.0 438 368.00 4988.0 767 370.00 6245.0 1,182 wet storage: wet storage required (cy) (67*DA) dewatering orifice elevation (ft) wet storage provided at this elevation (cy) available volume before cleanout (cy) (34*DA) cleanout elevation (ft) distance from cleanout to orifice (ft) (> 1') dry storage: dry storage required (cy) (67*DA) principle spillway crest (ft) dry storage provided at this elevation (cy) diameter of dewatering orifice (in) diameter of flexible tubing (in) (orifice+2") runoff: C (use 0.45 for bare earth) tc (min) 12yr 4.5 Q 2yr 125yr 6.5 Q 25yr principle spillway: available head (ft) diameter riser (in) spillway capacity, Qp (cfs) diameter trash rack (in) barrel length (ft) head on barrel through embankment li diameter of barrel (in) Sediment Trap 'A' Design drainage area (acres) (<3) 0.82 1 VARMBI£ trap volumes: oRIcrui CREST OF STONE WEIR CRWND wnAB E elevation (ft) area (sf) volume(cf) volume(cy) uLv. 360 48 0 0.0 A 361 230 128 4.7 DRY STORAGE - " H VARVEEE 362 425 450 16.7 363 686 1,001 37.1 364 1056 1,865 69.1 WET STORAGE V 365 1492 3,133 116.0 ON" VATED) E ER CLOTH O GiuAL 366 1976 4,861 180.0 �ND \ G EV -SEE PLATE 3,13-1 COARSE AGCPEGATC CLASS I RIPRAP wet storage: wet storage required (cy) (67*DA) 54.9 bottom of stone weir (ft) 363.6 wet storage provided at this elevation (cy) 54.9 slope of wet storage sides 2:1 weir length (ft) (ii min.) 10.0 dry storage: bottom of trap elevation (ft) 360 dry storage required (cy) (67*DA) 54.9 bottom trap dimensions: 29x3' crest of stone weir 365.0 top of dam elevation (ft) 366 dry storage provided at this elevation (cy) 61.1 top width of dam (ft) 10, slope of dry storage sides 2:1 top trap dimensions 79'X31' MIN.1'W/SPILLWAY 2' WOHWT HIGH WATER STORM EuvV) DE" STORAGE? WET STORAGE SEDIMENT CLEANOUT PdNT (- WET , STORAGE REDUCED TO 34 C.Y./ ACRE) 339 design high water 365.22 top of dam (ft) 578 top width of dam (ft) 172 bottom of basin (ft) 363.84 approx bottom dimensions: 1.4 upstream face slope: downstream face slope: 339 baffles: 367.50 length of flow, L (ft) 339 effective Width, We (ft) 6.0 L / We (baffles required if < 2) 8.0 collars: depth of water at spillway crest (ft) 0.45 slope of upstream face (Z1) 8 slope of barrel (Si 10.2 length of barrel in saturated zone (Ls) 16.3 number collars required dimension of collars 1.00 emergency spillway: 48 required capacity (Q25-Qp) (cfs) 48.0 bottom width (ft) 72 slope of exist channel ftft) 34.5 minimun length of ept channel (ft) 4.3 crest of spillway (ft) 24 CREST OF EMERGENCY SPILLWAY RISER CREST DEWATEMNG D CE 368.50 370.00 10.0 362.0 40'x66' 3:1 2:1 YES 80 59 1.4 YES 5.5 3 0.72% 34 2 3.7'x3.7' YES 0.0 20 33% 9 368.5 IIIYI I_ I V/"1J11V V VL.'. L-JLliLC,=jV JLVIIVILIV 1 I lx! l ( VI- II 11­-J LC1=jV PROPOSED PERMANENT . Al (BARREL) & AT7 (RISER)-T6 - BE BUILT WITH TE CRARY ST'A'. RISER TO BE SEALED - - �- WATERTI T UNTILTHE TEMP:SEDIMENTTRAP.IS- \ VE RTED TO A PERMANENT FACILITY - - // PROPOSED 10' WID VDOT CL. AI RIPR-AP LINED - EMERGENCY SPILLWAY-CI>,ESTFL€V.--365.00'. PROPOSED PPRCPO5'ED SAFE-TYF NE E, �- PROTECTION. SEE STORMWATERT /INSTALLSIGNS "WARNING ,�� MANAGEMENT SHEETS FOR DETAILS. QUICK SAND, KEEP OUT' 00000 s' 10' WIDE TOP OF - ` - - - DAM ELEV.-366' s � � s� EXISTING TREELINE. TREES & VEGETATION IN THE VICINITY OF SEDIMENT TRAP 'A' SHALL BE CLEARED. DURING ESC PHASE I, CLEARING & GRADING ACTIVITIES /\ SHALL BE LIMITED TO THOSE NECESSARY FOR THE / INSTALLATION OF THE ESC PHASE I MEASURES. PRO ,PU(SED BAFFLES / / PROPOSED SAFETY FENC INSTALL SIGNS "WARNING / /QUICK SAND, KEE OUT" s / PROPOSEp PERMANENT,,S/TR. B1 (BARREL) & EWA T}/ BE RA� S BUILT/WrFH TEMPOB'B/ ST�. Bl IS 34.56 LEE OF 02$" H PEAT 0.724 �p-364�25 Io=�369.00)/ 6� � Q GRAPHIC SCALE 30 0 a5 30 6o ( IN FEET ) 1 inch = 30 ft. ZY / A) o THE LOWER PORTION OF PROPOSED STR. B2 (RISER) AND STR. B1 (BARREL) SHALL BE INSTALLED WITH SEDIMENT BASIN 'B'. THESE WILL REMAIN WHEN THE TEMP. L �c BASIN IS CONVERTED TO A PERMANENT FACILITY. THE UPPER PORTION OF STR. B2 SHALL BE INSTALLED IN SEGMENTED RINGS. THE SEGMENTED RINGS WILL ACCOMMODATE THE ESC's TEMPORARY RISER AND WILL BE REMOVED & REPLACED WITH NEW SEGMENTED RINGS FOR THE SWM FACILITY'S RISER. THE ESC RISER SHALL HAVE A RIM ELEVATION OF 367.50', HAVE A 06" DEWATERING ORIFICE / INVERT ELEVATION OF 365.22', A TRASHRACK & A RISER BASE MEETING MINIMUM VESCH 3.14 REQUIREMENTS. SEE SHEET 9 FOR DETAILS OF THE TRASHRACK & THE I DESIGN OF THE PERMANENT SWM RISER. RISER TO BE EMBEDDED A MINIMUM OF 6" INTO AN 8'Wx8'1_x18"D REINFORCED CONCRETE FOUNDATION OR BE PLACED ON AN 8'Wx8'Lx }" THICK STEEL PLATE COVERED WITH 2.5' OF STONE OR COMPACTED SOIL. ,3 10' WIDE TOP 0 \ DAM ELEV.-370' PROPOSED 20' WIDE VDOT CL. AI RIPRAP LINED \ EMERGENCY SPILLWAY CREST ELEV.=368.50'. \ GRAPHIC SCALE 0 0 i5 30 60 ( IN FEET ) 1 inch = 30 ft. Lic. No. 035791 .1:_- 1/8/21 4j z O a Z w � O O < Z J o F_ y Ln H ^,A Lu z V, w W 0 0-) z Q � J Z 0-' N a W N I O T T V1 W N z N Q W z > _j0 J I --I O >n m z 0V I J 0 Q 1� z 0 z J W [1� C Q � H� W LU LU 0 z Ul W z o z 0 W � W W J J� o `" U z W W O W Q O Q O N U Lu w O w K U) d U) JOB NO. 202193 SCALE AS SHOWN SHEET NO. 7 WATERSHED SUMMARY FOR SUBAREA A 55 POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN, SCALE 1"=50' STORMWATER MANAGEMENT NARRATIVE: - TF Area, 1-year Flow, 2-year Flow, 10-year Flow, O CN / //��//, / OVERVIEW: THE PROPOSED STORMWATER MANAGEMENT PLAN COMPLIES WITH PART IIB SWIM REQUIREMENTS. CHANNEL & FLOOD PROTECTION H %T ac. cfs cfs cfs COMPLIANCE ARE MET IN ACCORDANCE WITH MINIMUM 9 VAC 25-870-66 REQUIREMENTS & WATER QUALITY REQUIREMENTS HAVE BEEN O ��j / k SATISFIED. PLEASE SEE THE ATTACHED STORMWATER MANAGEMENT CALCULATIONS PACKET FOR ADDITIONAL DETAILS PERTAINING TO THIS DA A (Post-Dev.) 84 1.36 2.04 3.02 6.43 / / I I PLAN's COMPLIANCE. SCOTT R. LLINS!Z / WATER QUANTITY SUMMARY U Lic. No. 035791 a WATERSHED SUMMARY FOR SUBAREA B � j / THE VAST MAJORITY OF THIS PLAN'S PROPOSED DEVELOPMENT IS CAPTURED VIA STORM WATER CONVEYANCE SYSTEMS. THE PROPOSED STORM SEWER SYSTEMS DISCHARGE INTO TWO PROPOSED STORMWATER MANAGEMENT FACILITIES, EACH OF WHICH HAS A CONCENTRATED .0 R, Area, 1-year Flow, 2-year Flow, 10-year Flow, o o ,p 1/8/21 r� CN OUTFALL. DRY DETENTION BASIN 'A' ATTENUATES RUNOFF FROM SUBAREA W AND UNDERGROUND DETENTION SYSTEM 'B' ATTENUATES p ac. cfs cfs cfs _ �/M / RUNOFF OUTFALLS. SUBAREA'B'. CHANNEL AND FLOOD PROTECTION ANALYSES WERE PERFORMED AT BOTH OF THESE FACILITIES' CONCENTRATED jONAL E�Gl DA B (Post-Dev.) 91 4.31 3.30 10.83 21.75 FROM A CHANNEL PROTECTION STANDPOINT, BOTH STORMWATER MANAGEMENT FACILITIES ARE COMPLIANT WITH 9 VAC 25-870-66 SUBSECTION B.3.a (ENERGY BALANCE) AND THE LIMITS OF ANALYSES STOP AT THE SWIM FACILITIES' OUTFALLS SINCE SUBSECTION B.3.a IS / \ / \ \ ' MET. FROM A FLOOD PROTECTION STANDPOINT, BOTH SUBAREAS ARE IN COMPLIANCE WITH 9 VAC 25-870-66 SUBSECTION C.2.a (CONFINES / PROPOSED LIMITS OF SWIM/ ! - _ THE 10-yr POST-DEV. STORM EVENT WITHIN SWFACILITIES) AND THE FLOOD PROTECTION LIMITS OF ANALYSES STOP AT THE OUTFALLS ' ' V DISTURBANCE COINCIDES i ' / / ' \ 65' OF OLF / A ELEV=B' WITH PROPERTY LINE SINCE SUBSECTION C.3.c IS MET (THE SWIM FACILITIES OUTFALL TO A MAPPED FLOODPLAIN OR OTHER FLOOD -PRONE AREA). Z �� �i / / � , ' ��� \ \ & 1,000' OF CH L. FLOW W/ / �co / 40' OF iw WATER QUALITY SUMMARY = / A ELEV 2' ^ . 4THE BOUNDARY FOR THE ESC LIMITS OF DISTURBANCE WAS USED FOR THE BOUNDARY FOR THE VIRGINIA RUNOFF REDUCTION METHOD'S O 40' OF CHNL FLOW ,� O WATER QUALITY CALCULATIONS. THE PROPOSED DEVELOPMENT RESULTS IN AN OVERALL REQUIRED PHOSPHOROUS REMOVAL RATE 3.63 Ibs/yr. THIS PHOSPHOROUS LOADING IS MITIGATED THROUGH THE BEST MANAGEMENT PRACTICE OF PURCHASING NUTRIENT CREDITS. Post-Dev. Subarea A Impervious Area Summary �,Pr000secl Road &Parking Areas35,65o sf Sidewalk 1,825 sf 37,475 sf z J l // Post-Dev. Subarea B Impervious Area Summary 0.61 ac. _ jRoad & Parking Areas 66,725 sf 1 Tc=0.10 hrs. ,�� U Co / - -� � � �' e ` � c - J // w , � Proposed Building 78,875 sf Z W Co 'i ! _ / M W \ �� Proposed Sidewalk 7,575 sf / / �/ // / , / W N / \ I c O Z 153,175 sf F / PROPO\SE S �F w VI \ 78- - J / / / • / / W poi R N ` \ \ Overall Acreage Summary rw W ., FF=380.67 LU 1W FFE=380.67 \ \ \ 386 / / ' �� ` ` ✓ /� % // / ' _�\\\\\ \ �� \ \ \ DAB 37669 \ W i�� \\ `� '' /�� �������5� - ��\\ �\ \9LO n 5.06 ac. - _ //00 Tc=0.10 I G'P� p x •-, _ 717 / Pre -Development Post -Development Area, ac. Area, ac. DA A 0.68 1.36 \ DAB 31.4950 .50 4.31 .50 370 ` - r �- - - _ - z 3 _ - - - _ _ -� \ -_ _ _ - _ _ _ - - - - --� Post-Dev. Impervious Area Summary (For Water Quality) �/ WALL. / \ ' \ ✓ �``�� - PgSED-L4MITS OF_ _ - - _ _ 8 � j / (VRRM Water Quality Boundary defined by ESC LOD Boundary) ' RR OSED�LIMITSOi= - - - - - -� - / - 'bISTURBANCE ODES / I`7 ^ %� - 5 �_\ Road & Parking Areas 103,275 sf 1..� DISTURBANCE COINCIDES JS �� -� ' WITH PROPERTY LINE _ _ --''-``-. (LE / \ \ WITH PUBLIC EASEMENT` \ ` 0�\ / - _ _ _ _ - - -FEMA 100 Yg+cyuuau�IN ' / M��tE \ \ \ \\ Proposed Building 78,875 sf N - uMus; TxP/ _ Proposed Sidewalk 10,075 sf \ _ 192,225 sf S PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN, SCALE 1"=50' WATERSHED SUMMARY FOR SUBAREA A S Pre-Dev. Subarea A Impervious Area Summary Road & Parking Areas 15,100 sf Area, 1-year Flow, 2-year Flow, 10-year Flow, CN ac. cfs cfs cfs � �°° �- Misc. Abandon Structures 1,500 sf Exposed / Bare Earth 9,500 sf ( N DA A (Pre-Dev.) 89 0.68 2.08 2.71 4.63 / _- 26,100 sf W O / ) V WATERSHED SUMMARY FOR SUBAREA B j \ / Pre-Dev. Subarea ea Impervious Area Sum � Area, 1-year Flow, 2-year Flow, 10-year Flow, / �o �o Road &Parking Areas 26,950 5f N z CN _ Misc. Abandon Structures 2,000 sf F� ac. cfs cfs cfs - - % / DA B-1 (Pre-Dev.) 78 1.49 2.69 3.81 7.46 7, / Exposed /Bare Earth 30,050 sf Q 0 J DA B-2 (Pre-Dev.) 77 3.50 6.00 8.57 17.01 r /,_, �� ) Pre-Dev. Subarea B-2 Impervious Area Summary > J 77 4.99 8.69 12.38 24.46 ` PROPOSED LIMITS OF , ( Road & Parking Areas 57,750 sf I� DISTURBANCE COINCIDES �� - l - - - �� Ah . \ WITH PROPERTY LINE �i T / -T i �� \ res � Misc Abandon Structures 620o sf : z Exposed / Bare Earth 7,650 sf - W M o�% ����� 71,600 sf W U / 0. iILL ------------ Q 5 / , - � H� DAB-1 /310 i ��ii i i / (UNDETAINED RUyurr - I CC / -- - - MOORES CREEK / J: / / -CN-2 h / U Tc=0.12 hrs. gk / /�,j\ - �� �� ♦l, / / ® / �� / / /Uj / DA A _ (UNDETAINEDRUNOFF \V Q / OL��F������w..((��10 EV-7'JJi" W 70' OF�OO -fL9YJ W/ A TO MOORES CREEK-) / ✓ / / , / 'V / / / �, CM EL =11' 0.68�t`' ' /' � "V / a a / �` � % � PROPOSED II F 11/ �.� 1 0' OF F w 4 ELEV�=6' \ ` / / / '1`b _ _.-378- - CN-90 _ _ _ _ _ / �/ PJ`".. . ��li - DISTURBA ll� / �� ,� Tc=0.10 hrs. '7 / / A 310' OF/CONC. FLOW w/ 0 ELEV25' 30' of cHNL. FLOW Y� ` ME IN 0,0 4W/ S ( _ WN.. TAINED RUNOFF\ �V ',' / j�j�� � �� ` o� U� TO'MOOFFS-CREE / '/ • \ \ \ CN Tc= 86 / / .SO hrs. V r / O `\ 3az� ,' 00' of ocF W7 ♦ / / / �S� \ a2 W Q -- 2 0' &F-CONC. -FLOW EV= �l - - - / /_S� \\ 1 \ \90 v�i p 0 37$f-----' / �� _ ` `-- ���_ J/ ii/�'\1 \ \ T )O O /r JAICD � �37 r �, _ S0� - __ _ _ / / =J - - _ _ 11 Pre-Dev. impervious Area Summary tror Water Qualit (VRRM Water Quality Boundary defined by ESC LOD Boundary) U LU Road & Parking Areas 105,275 sf o w Misc. Abandon Structures 9,700 sf a U) Exposed / Bare Earth 26,300 sf cos No. o _---_/% �WAC�i ' � i EL �� 5 sf 021,9 WAL / HA A FLOOD PROTECTION SUMMARIES 2 SCALE 3 ` _ \ /`✓ i 3600 - _ _ - PO STRQF1 ��/ PGSED-LIMITS-OF= _ L, CHANNEL AND F PR OS MITSOF - - - - - - - - Z - \ / ' - 6isTURBANCE COINCIDES - , ' j/ Concentrated Outfall Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 1 = 50 360 ' i ' WITH PROPERTY LINE - S DISTURBANCE COINCIDES o / - _ _ _ - "� ' OOR� (Point of Analysis) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection WITH PUBLIC EASEMENT` \ _ _ _ _ _ - - -FEMA 100-y- FLOODPLAIN / 000 SHEET NO. ¢s%TMP - ' Subarea A Outfall Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Outfalls to mapped Floodplain) Subarea B Outfall Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Outfalls to mapped Floodplain) 8 370 ` - r �- - - _ - z 3 _ - - - _ _ -� \ -_ _ _ - _ _ _ - - - - --� Post-Dev. Impervious Area Summary (For Water Quality) �/ WALL. / \ ' \ ✓ �``�� - PgSED-L4MITS OF_ _ - - _ _ 8 � j / (VRRM Water Quality Boundary defined by ESC LOD Boundary) ' RR OSED�LIMITSOi= - - - - - -� - / - 'bISTURBANCE ODES / I`7 ^ %� - 5 �_\ Road & Parking Areas 103,275 sf 1..� DISTURBANCE COINCIDES JS �� -� ' WITH PROPERTY LINE _ _ --''-``-. (LE / \ \ WITH PUBLIC EASEMENT` \ ` 0�\ / - _ _ _ _ - - -FEMA 100 Yg+cyuuau�IN ' / M��tE \ \ \ \\ Proposed Building 78,875 sf N - uMus; TxP/ _ Proposed Sidewalk 10,075 sf \ _ 192,225 sf S PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN, SCALE 1"=50' WATERSHED SUMMARY FOR SUBAREA A S Pre-Dev. Subarea A Impervious Area Summary Road & Parking Areas 15,100 sf Area, 1-year Flow, 2-year Flow, 10-year Flow, CN ac. cfs cfs cfs � �°° �- Misc. Abandon Structures 1,500 sf Exposed / Bare Earth 9,500 sf ( N DA A (Pre-Dev.) 89 0.68 2.08 2.71 4.63 / _- 26,100 sf W O / ) V WATERSHED SUMMARY FOR SUBAREA B j \ / Pre-Dev. Subarea ea Impervious Area Sum � Area, 1-year Flow, 2-year Flow, 10-year Flow, / �o �o Road &Parking Areas 26,950 5f N z CN _ Misc. Abandon Structures 2,000 sf F� ac. cfs cfs cfs - - % / DA B-1 (Pre-Dev.) 78 1.49 2.69 3.81 7.46 7, / Exposed /Bare Earth 30,050 sf Q 0 J DA B-2 (Pre-Dev.) 77 3.50 6.00 8.57 17.01 r /,_, �� ) Pre-Dev. Subarea B-2 Impervious Area Summary > J 77 4.99 8.69 12.38 24.46 ` PROPOSED LIMITS OF , ( Road & Parking Areas 57,750 sf I� DISTURBANCE COINCIDES �� - l - - - �� Ah . \ WITH PROPERTY LINE �i T / -T i �� \ res � Misc Abandon Structures 620o sf : z Exposed / Bare Earth 7,650 sf - W M o�% ����� 71,600 sf W U / 0. iILL ------------ Q 5 / , - � H� DAB-1 /310 i ��ii i i / (UNDETAINED RUyurr - I CC / -- - - MOORES CREEK / J: / / -CN-2 h / U Tc=0.12 hrs. gk / /�,j\ - �� �� ♦l, / / ® / �� / / /Uj / DA A _ (UNDETAINEDRUNOFF \V Q / OL��F������w..((��10 EV-7'JJi" W 70' OF�OO -fL9YJ W/ A TO MOORES CREEK-) / ✓ / / , / 'V / / / �, CM EL =11' 0.68�t`' ' /' � "V / a a / �` � % � PROPOSED II F 11/ �.� 1 0' OF F w 4 ELEV�=6' \ ` / / / '1`b _ _.-378- - CN-90 _ _ _ _ _ / �/ PJ`".. . ��li - DISTURBA ll� / �� ,� Tc=0.10 hrs. '7 / / A 310' OF/CONC. FLOW w/ 0 ELEV25' 30' of cHNL. FLOW Y� ` ME IN 0,0 4W/ S ( _ WN.. TAINED RUNOFF\ �V ',' / j�j�� � �� ` o� U� TO'MOOFFS-CREE / '/ • \ \ \ CN Tc= 86 / / .SO hrs. V r / O `\ 3az� ,' 00' of ocF W7 ♦ / / / �S� \ a2 W Q -- 2 0' &F-CONC. -FLOW EV= �l - - - / /_S� \\ 1 \ \90 v�i p 0 37$f-----' / �� _ ` `-- ���_ J/ ii/�'\1 \ \ T )O O /r JAICD � �37 r �, _ S0� - __ _ _ / / =J - - _ _ 11 Pre-Dev. impervious Area Summary tror Water Qualit (VRRM Water Quality Boundary defined by ESC LOD Boundary) U LU Road & Parking Areas 105,275 sf o w Misc. Abandon Structures 9,700 sf a U) Exposed / Bare Earth 26,300 sf cos No. o _---_/% �WAC�i ' � i EL �� 5 sf 021,9 WAL / HA A FLOOD PROTECTION SUMMARIES 2 SCALE 3 ` _ \ /`✓ i 3600 - _ _ - PO STRQF1 ��/ PGSED-LIMITS-OF= _ L, CHANNEL AND F PR OS MITSOF - - - - - - - - Z - \ / ' - 6isTURBANCE COINCIDES - , ' j/ Concentrated Outfall Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 1 = 50 360 ' i ' WITH PROPERTY LINE - S DISTURBANCE COINCIDES o / - _ _ _ - "� ' OOR� (Point of Analysis) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection WITH PUBLIC EASEMENT` \ _ _ _ _ _ - - -FEMA 100-y- FLOODPLAIN / 000 SHEET NO. ¢s%TMP - ' Subarea A Outfall Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Outfalls to mapped Floodplain) Subarea B Outfall Section B.3.a (Energy Balance) N/A (Energy Balance Satisified) Section C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Outfalls to mapped Floodplain) 8 GENERAL SWIM NOTES: ' `'•1 COUNTY OFALBEMARLE 1. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPEN I NGS. SEE THIS SHEET, OR EQUIVALENT, FOR DETAILS. Departrient of Community Development 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. ALL EXISTING '�- AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BYAN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING417 THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE SAMPLING. µt> .4 p Construction Record Drawings (As -built) for VSMP . THE DOWNSTREAM EMBANKMENT SIDE SLOPES OF ALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM :a SLOPE. 4 3 5. CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN THE ESC SEDIMENT BASINS ATTHE TIME OFTHE FACILITIES'CONVERSIONS TO PERMANENT SWIM FACILITIES,IFAPPLICABLE. AT SUCH TIME THE CONTRACTOR SHALL REGRADE THE SEDIMENT BASINS TO THE PROPOSED GRADES The following is a list of information required on construction record drawings for SHOWN ON THE SWIMSHEETS. THE CONTRACTOR SHALL MINIMIZE SOIL COMPACTION DURING THE CONVERSIONS. stormwater facilities (reference Water Protection Ordinance 17-422). /t is preferable that the DRY DETENTION BASIN CONSTRUCTION NOTES: construction record drawing be prepared by someone other than the designer. Please do not FACILITY PLANTING SPECIFICATIONS: provide design drawings as construction record drawings. 1. THE DETENTION BASIN SHALL HAVE TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING BEYOND THIS IS OPTIONAL AND IS NOT REQUIRED. 2. THE PROPOSED INTERIOR SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 4:1, OR 3:1 IF SAFETY BENCHES ARE PROVIDED AT THE TOP OF THE A. A signed and dated professional seal of thepreparingen ineer or surveyor. g P g Y FACILITY, TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES SHALL BE GRADED TO PROVIDE POSITIVE DRAINAGE AT ALL TIMES TO THE B. The name and address Of the fine and individual preparing the drawings on the title sheet. RISER STRUCTURE. 3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE C. The COUStIUCted location Of all Items associated with each facility,and the inspection records to verify Pe Y PRINCIPAL SPILLWAY STRUCTURE. proper dimensions, materials and installation. The items include, but ate not limited to the following: 4. THE SOILS IN THE TER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY THE � 1. Inspection Records and for 1 trenches and bedding, including underdrains. COMPACTED DENSITY OF THESE COMPACTED SOILS CAN BE SO GREAT THAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO photographs Pe P groP pipe g• g PREMATURE MORTALITY OR LOSS OF VIGOR. AS RULE OF THUMB, PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER 2, Video Pipe Inspection for any pipes which are not accessible or viewable. OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK. 3. Updated ated Location with o-coordinates of all facilities. S. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY p ge RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS. 4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities. CONTRACTOR REQUIREMENTS: 5. Current physical and topographic survey for all earthen structures. Ponds should include a survey 1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS. Of the pond bottom. Surveys ShOUId verify pond Volumes are per design. Corrections may be required 2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION. for aIICC3Iloi1S From the design. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE 6. Plants, location and type. 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). ALL DISCREPANCIES SHALL BE BROUGHT TO THE 7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY. 3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR installed type of drainage structures, culvertlpipe size, weirs, materials, inlets or end treatment(s), NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005. inlet and outlet protection, alignment and invert elevations compared t0 design. 4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY DESIGNER OF ANY VARIANCE FROM THE PLAN. � 8. Computations: For significant deviations from design, sealed computations verifying that fY 5. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY AT 1-800-552-7001 BEFORE LOCATION O provide P g gn• P P g ANY EXCAVATION). the as -built Condition Is equivalent Or better than design. 6. REFER TO THE APPROVED FINAL SITE PLANS FOR ANY DETAILED SITE INFORMATION. 9. Ditch Lines - Display the constructed location of all ditch lines and channels, including teal y tYP• 7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES. P g S. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE BARK BUDS BRANCHES STEMS OR OVERALL SHAPE OF sections and linings. THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN. all lO. Easements - Show atatted easements with dead book references labeled Facilities and drainage 9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL P g BE HEALTHY VIGOROUS AND FREE FROM DEFECTS DECAY DISEASES INSECT PEST EGGS AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL must be within platted easements. Provide copses of recorded documents. BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED. 11. Guardrail, fences or other safety provisions - Display the constructed location of all safe[ P P 10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLYTO Y r HOLD ITS SOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED. provisions; fences, guardrail, including the type, length and applied end treatments, compared to 11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE n. desl g 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 MOISTSAWDUST WET BURLAP WOOD CHIPS SHREDDED BARK PEAT MOSS OR OTHER SIMILAR MULCHING MATERIAL. 12. Material layers 'ers - biofilter meth layers, stone la erssand layers, keyways and cores must be verified as to 12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE material types and depths. Include inspection reports, boring Or test pit reports and materials INSPECTOR INITIALLY, AND THEN THE DESIGNER. 13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE certifications. Biofrlter media must be an approved state mix. APPROVED BY THE DESIGNER. 13. Access roads - show location Of access roads, surface treatment, drains etc, as applicable. �• PP 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 14. Compaction reports are required to verify fill Compaction in dams. OCONTRACTOR T MASS, OUT CRAMPING ROOT T 15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning. 16. THE HALL MAINTAIN A ONE (1) CALENDAR YEAR 90°k 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. StormRax^" FACILITY CONSTRUCTION ROUND SERIES TRASH RACK (OR EQUIVALENT) 1. DETENTION BASINS MAY SERVE AS SEDIMENT BASINS AND/OR TRAPS DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS). CONCRETE MANHOLE STANDARD 60 INCH RACK SHOWN INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION POND IN MIND. APPROPRIATE PROCEDURES SHALL BE DIMENSIONS IN INCHES IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN. 2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY STABILIZED. IF THE HOPE!emucruww vuenc•r PROPOSED POND SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED, Pumcsaur %nc DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS. 3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT A ouwrea Lenox STAGING AREAS WHEN POSSIBLE. I B rtruwrart.taru 4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECTAREAT REQUIREDTOTHE DESIRED SUB -GRADE. 5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION r� c�'j. PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, ------ i i . NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION. 6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE. ,•i 7. CONTRACTOR SHALL ALSO INSTALL THE RISER OUTFLOW STRUCTURE AND/OR THE BARREL s WITH PERMANENT COLLARS DURING THE ESC PHASE. i I'. •. 1 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 Speci(carions Property Test Method Unit Specification Perna abilNy ASTM D-2434 Cm/sec 1 x 10 Plasticity Index of Clay ASTM D-4231424 % Not less than 15 Liquid Limit of Clay ASTM D-2216 % Not less than 30 Clay Particles Passng ASTM D-422 % Not less than 30 Clay Compaction ASTM 0-2216 % 95% of standard Proctor density BoUrce: Virginia normwaler Management HanaDoolt jiww) 9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTILTHE APPROPRIATE ELEVATION AND DESIRED CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN. 10. CONTRACTOR SHALLTHEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS. 11. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION IF APPLICABLE. 12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVERSTRAIN. 13. THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, IF APPLICABLE. FACILITY MAINTENANCE: MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN. 2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE. 3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING. 4. 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. 5. INSPECT BASIN OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc. 6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS AS APPLICABLE FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES. 8. 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. 9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING. 10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICALTO 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 DETENTION BASIN'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. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(s). 4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS) 5. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE) 6. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) 0120" WEIR PLATE DETAIL NOTE: SCALE: s"=5' WEIR PLATE TO BE SECURELY BOLTED, OR SIMILARLY FASTENED, TO THE DETENTION SYSTEM. 8.35' ELEV.=374.5' (TOP OF PIPI OVERFLOW WEIR IS HYDRAULICALLY EQUIVALENTTO AN ORIFICE WITH AN APPROX. DIAMETER OF 024.62" ELEV.=372.2! INSTALL TRASH RACKS ON ALL ORIFICES, TYP. SEE THIS SHEET FOR DETAIL, OR EQUIVALENT. UNFORCED 12 GA. MANUFACTURE/ INSTALL ONE (2) 07.5" LOW -FLOW STEEL PLATE ORIFICE IN THE STEEL WEIR PLATE AT THE LOW POINT ELEV.=364$' OF THE DETENTION SYSTEM (INVERT ELEVATI ON364.5') (BOTTOM OF PI PLAN SIDE VIEW StormRax "' Round Series for Concrete Manhole 1411111" DImA Dime 1111111 RSIID MIIIDB RS-24 17Y4 14Y, L 24 30 RS-36 21k 14 40,I 36 43 RS48 27 M 54 a 57 RS-60 27% 13% 6SU lie 70 Plastic Solutions, Ins. a'R0"ER "•,y PO Box 43 238 Mocks , , A, 226Z0Z64 03V s7n en-Z7rcp8pE,7 I540) 7z24219 fax help/A-plastlo-eolud n.mn 18" MIN. COVER OVER CROWN OF PROPOSED 0120" CMP. (WHEN UNDER PAVEMENT/CONCRETE, THE 18" MIN. COVER IS TO BE BETWEEN THE BOTTOM OF PAVEMENT/CONCRETE & THE CROWN OF THE PIPE.) PROPOSED STIR. B2, VDOT STD. MH-i RIM ELEV.=376.20' 11=36435 (B3) 11=368.25(BS) 10=364.25 (B2) PROPOSED STIR. B3, LOWER PRIMARY OUTFALL. (8.00 LF OF 028" HDPE Lai 2.75%) PROPOSED STIR. B2, 34 So LF- OF 024" HDPE Lai 0.72ek I PROPOSED VDOT STD. EW-i , 1365 3� 360 J -1 W W N [D CD 0 LULL ISOMETRIC CONCRETE STRUCTURE DIMENSIONS INSIDE STRUCTURE DIMENSION OUTSIDE STRUCTURE DIMENSION AVAILABLE oprnow CROSS BRACING FOR OVERHANG HDPE ANTI -VORTEX PLATE 6lTk DRIAN BY: IPPO BY: DVAIL s I /2" zinc plated hook _attached with a/B' fastener ®® 1/45" %1a heap Isometric pipAll I/4' HOPE plate (optional) e ice`}.. evils t NOPR structural plastic with 2-1/8" holes and 1/4" plat, manufactured by Plastic Solutions Inc. or equal , shown with Dptlocal plate HDPE structural plastic with - '/B" holes and 114' plate mfactured by Plastic dienx Inc. or equal o` rl!.ce PLASTIC R 'Jae S DEBRIS CAGE OLUTIONS RlndMer V"?E604 INC. - 877 877-6727 m.pler0o-wlunrnm SECTION A-9: TYPICAL GR1PffiC_-1L DETAILS Homogeneous fill I ' rain Cut oft t ench l' below ttaila6MI material I Soil or rock L--_-_------J TYPICAL HOMOGENEOUS EMBANKMENT Perforated c: FOUNDATION DRAIN f rfi ottsoTs BLANKET DRAIN Fill or gravel \ /�,hlvloy Orain Sand, gerd «and drain Wlb Rock or grovel Rock tee oe drain ° o Transition filler Tranaiiloi filter CHIMNEY DRAIN TOE DRAIN Figure A -la. Homogeneous Embankarerrts w/Seepage Controls MH w/ STAIRS FOR INSPECTION & MAINTENANCE, TYP. ACCESS MH TO BE LOCATED PROPOSED STIR. B7, rPROPOSEDACCEIS UPSTREAM & DOWNSTREAM FROM RESTRICTIVE UPPER BYPASS WEIR PLATE AND NEAR THE INFLOW POINT AT THE PROPOSED STIR. B6 VDOT STD. MH-i OUTFALL (8.00 LF OF HIGH END OF THE SYSTEM, AS SHOWN. RIM ELEV.=376.39' 0a8" HDPE @18.75%) 11=370.75 (B7) 10=368.75 (BS) PROPOSED t2.2' PROPOSED 375 GRADE 375 375 GRADE PROPOSED STIR. B2, 10-yr PEAK WSE=374.66 VDOT STD. MH-TRIM 2-yr PEAK WSE=373.04 ELEV.=376.20' 1-yr PEAK WSE=372.02 11=36435(B3) 11=368.25 (BS) 370 0=364.25(61) 370 370 EXISTING I GRADE PROPOSED STIR. B5, y.00 LF OF 028" HDPE Qa 12.50% PROPOSED UNDERGROUND -EXISTING DETENTION SYSTEM TO ATTENUATE GRADE RUNOFF CAUSED FROM THIS 4. 365 DEVELOPMENT. SEE THIS SHEET 365 365 SHEET io FOR DETAILS. RESTRICTIVE STEEL WEIR PLATE, AT LOW POINT, TO DRAIN THE SYSTEM. SEE DETAIL ON THIS SHEET. PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (MIN. L=12', Wi=6', W2=6.8', D=i8") 360 360 ON > > O M Ld Lu 0) O W W M u7 10 0 W � CID I") � I'") 0+50 1+00 1+50 0+25 UNDERGROUND DETENTION SYSTEM 1 PROFILE SCALES UGD SYSTEM BYPASS 1"=5' (V) 1"=50'(H) DRY DETENTION BASIN 'A' DETAIL, SCALE 1"=30' PROPOSED FLAT VDOT CL. Al RIPRAP / LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (MIN. L=8', Wi=6', W2=io', D=i8") EE 1 \ 8'WIDETOPOFDAM / SCALFHS ROFEESA� ' sa-aik,� \ ELEV.=366.00', TYP. / THE 5WM FACCLI,TY TYP. A / / / FEMA - YR -_ PROPOSED 2o' WIDE VDOT CL. All \ - FLO DPLAIN / RIPRAP LINED EMERGENCY SPILLWAY r \ - w/4:2 SIDE SLOPES & FILTER FABRIC �� / PROPERTY LINE, / UNDERLAYMENT(STONE DEPTH=i8"). TYP. SPILLWAY CREST ELEV.=664-75. TO PREVENT FLOTATION THE 8' WIDE EMBANKMENT (MAX. ' RISER BASE SHALL BE FIRMLY CROSS SLOPE=2%) & ADJACENT HANDRAILS (MEETING MIN./ EMBEDDED6"INTO AN -THICK REINFORCED CONCRETE BUILDING CODE REQUIREMENTS) - ,,/ FOUNDATION THAT IS 8'x8', ON THE RETAINING WALL SERVE +D/0 AND BURIED BELOW GROUND. AS A SAFETY BENCH/MEASURE \ r % SCOTT/R. ClUINSZ Lic. No. 035791,a p 1/8/21 PROPOSED RISER, STR. A2 PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (o.So MIND ^ WITH POSITIVE SLOPES THROUGHOUT. z / 4/ \- O_ F Q W W/ W W W ' U) - PROPOSED VARIABLE WIDTH _ - - - _ - _ _ _ _ _� � U 2: SWIM &ACCESS z -MA+NTENANCE ESMT �� 0 un 1 O Z O .a. y � F Z w XISTIN r/ H GRADE 3754 375 UJ STR. A2, A VDOT STD. B-1 (CONCRETE MANHOLE BASE WITH A 048") SHALL SERVE AS THE RISER'S LOWER SECTION & SHALL BE SET IN THE PROPOSED ce PROPOSED REINFORCED CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM GRADE ELEVATION OF 663.75' SHALL COMPLETE THE STRUCTURE. RISER TO INCLUDE (1) ONE PERMANENT 08.33" LOW -FLOW ORIFICE WITH AN INVERT 370 ELEV.=661.50. ALL ORIFICE OPENINGS SHALL HAVE STATE APPROVED TRASHRACKS, TYPICAL. SEE THE DETAILS ON THIS SHEET, OR EQUIVALENT, FOR ADDITIONAL INFORMATION. 100-yr PEAK WSE=364:14 10-yr PEAK WSE-363.97 2-yr PEAK WSE=363.83 1-yr PEAK WSE=363.66 I CONTRACTOR SHALL INSTALL EMBANKMENTIN ACCORDANCE w/ THE DESIGNS SHOWN ON THIS SHEET. PROPOSED BASIN's FLOOR SHALL BE SLOPED TO DRAIN TO THE RISER (o.5%MIN.) WITH POSITIVE SLOPES THROUGHOUT. TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY - EMBEDDED 6" INTO AN.28" THICK REINFORCED CONCRETE FOUNDATION THAT IS Tx8', AND BURIED BELOW GROUND. STIR At, 30.00 LF OF 024" CL. III RCP @ 1.67% (II=660.50, IO=660.00) 350 > 5 �8' WIDE TOP OF DAM ELEV.=366.00', TYP. )POSED VDOT STD. EW-i 360 370 \ 370 > GRADE PROPOSED FLAT VDOT CL. Al RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC UNDERLAYMENT (MIN. r- 355 L=8' Wi=6' W2=2o' D=28")^ 365 v' 365 I � q PROPOSED WIDEVDOT CL. Al RIPRAP LINED SPILLWAY � J 10' lDESLOPES&FIEMERGENCY w/4:1 SIDE SLOPES &FILTER FABRIC MISTING 0-) 6i NDERLAYMENT(STONE DEPTH=i8"). SPILLWAY CREST ELEV.=664.75'. GRADE N 350 360 360 > 00 OLr) N to Mco 0 J_1 M JJ W W 'n Ih r- r t7 N O Ifj 00 W W In t0 -t t0 O > 0 0 1) rr) l") to r7 (0l") h7 0 CD "� to V) "� to W W W W 0+50 1+00 1+25 0+25 O 0-) V) BASIN A SECTION PROFILE SCALES BASIN A SPILLWAY WN z F I I --I 1 50' (H) Q z a U General Construction notes for Stormwater Management Plans 1. All dams and constructed fill to be within 95% of maximum drydensity and 2% of optimum moisture content. All fill material Y P 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 P Y P P 9 is not to take place until the site is stabilized, and permission has been obtained from the County erosion control inspector. EMBANKMENT NOTES: THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH THE DETAILS SHOWN IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & RIPRAP AND 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. CONTRACTOR SHALL CALL THE COUNTY INSPECTOR FEM/( 100-YR & ENGINEERING DEPARTMENT 24-HOURS BEFORE FLOODPLAIN ANY ANTICIPATED CONSTRUCTION ACTIVITIES FOR THE BMPs. THIS IS INCLUSIVE OF WHEN THE PROPER UNDERGROUND DETENTION SYSTEM SUBGRADE IS LINE, TYP READY FOR PIPE CONSTRUCTION, BUT BEFORE / /' STONE BEDDING IS INSTALLED. / / SEE THIS/SHEETF SCALE DiPRO)` Y F THESWII CILITY,// P. / 0129" IN 3 .81' b/4 PROPOSED VARIABLEWIDTH S\A A & / ACCESS & MAINTENANCE ESMT. 0920" IN'V./364!54co � / SI / / I PROPOSED FLAT DOT CL.\Al RJR AP (\ LINED OUTLET PR TECTI W TH FILTERFABRICUN ERLAY Ef t 7\ (MIN. L�=6.8', 2', Wz=6', Wz 28' H� 0 LLJ 888888� _J D co z (n W 0 w J Q w O z(1� I� < Q UNDERGROUND DETENTION SYSTEM 'B' DETAIL, SCALE 1"=30' W ~ 0 a 1 / I 2:w 012 ') INV. 36488' 3.00 � Q 0.5% 1+ I LLI LA I I J� LA o F- PROPOSED UNDERGROUND DETENTION SYSTEM TO ATTENUATE RUNOFF F F E U� �h CAUSED FROM THIS DEVELOPMENT. SEE THIS SHEET & SHEET >.o FOR DETAILS. J Iglu Igo w z O PROPOSED ACCESS MH w/ STAIRS FOR INSPECTION & MAINTENANCE, TYP. ACCESS O 1 � 00 l //I MH TO BE LOCATED UPSTREAM & - - - - DOWNSTREAM FROM RESTRICTIVE WEIR, Q 0 0+25 PLATE AND NEAR THE INFLOW POINT AT /�7 6 THE HIGH END OF THE SYSTEM, AS SHOWN. O - BS 0120" INV.�4>69� O _--_-_-__-- 13.00 LF @ 0.5% LSTR. B RESTRICTIVE STEEL WEIR PLATE, -STIR. B2 N U I w W POINT, TO DRAIN THE SYS M. - - - - O = -- -- EE-DETAILONTHISSH -370a- to \ 0120" INV. 364.50` / - JOB NO. 202193 SCALE AS SHOWN 3F4 SHEET NO. 01111111111111111 sasoma----�-i- -i � - g HUGGER SINGLE BAR, BAND FLAT GASKET BOLT AND STRAP (SBBS) FLAT GASKET CONNECTION DETAIL (SBBS) 2 2/341x1/2" RE -ROLLED END HEL-COR PIPE GENERAL NOTES: 1. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26.4.2.4. 2, BAND MATERIALS AND/OR COATING CAN VARY BY LOCATION. CONTACT YOUR CONTECH REPRESENTATIVE FOR AVAILABILITY. 3. BANDS ARE SHAPED TO MATCH THE PIPE -ARCH WHEN APPLICABLE. 4. BANDS ARE NORMALLY FURNISHED AS FOLLOWS: • 12" THRU 48" 1-PIECE • 54" THRU 98" 2-PIECES • 102" THRU 144" 3-PIECES 5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS. 6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2 213"A/2" 7. DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES. 8. ORDER SHALL DESIGNATE GASKET OPTION, IF REQUIRED (SEE DETAILS ABOVE). H-12 HUGGER BAND DETAIL NOT TO SCALE 20 MIL PE IMPERMEABLE LINER OVER TOP OF PIPE LIMITS OF (IF REQUIRED) REQUIRED BACKFILL qnyp. 36" TYP. 36" SEE TYPICAL BACKFILL DETAIL NOTES TYPICAL SECTION VIEW NOT TO SCALE NOTE: IF SALTING AGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE PROJECT, A GEOMEMBRANE BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE EFFECTS THAT MAY RESULT FROM A CHANGE IN THE SURROUNDING ENVIRONMENT OVER A PERIOD OF TIME. PLEASE REFER TO THE UNDERGROUND DETENTION SYSTEM CONSTRUCTION NOTES: UNDERGROUND DETENTION SYSTEM MAINTENANCE MAINTENANCE OF THE UNDERGROUND DETENTION SYSTEM IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES. DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE OWNER THEREAFTER: 1. INSPECT THE FACILITY FOR SEDIMENT ACCUMULATION & REMOVE AS REQUIRED. 2. INSPECT THE CONDITIONS OF THE SYSTEM's ACCESS MANHOLES, WEIR PLATE, STORMWATER INLETS & OUTLETS AND JOINTS FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES. 3. INSPECT THE TRASHRACKS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES AND CLEAN OR REPLACE THE TRASHRACKS AS NECESSARY. 4. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS ACCESSIBLE AND CAN BE OPENED AND OPERATED. 5. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY. FACILITY INSPECTION: MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE UNDERGROUND DETENTION SYSTEM(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 DETENTION BASIN'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. INSTALLATION OF THE TRENCH, FILTER FABRIC UNDERLAYMENT, STONE BACKFILL, THE UNDERGROUND DETENTION SYSTEM AND THE OUTLET STRUCTURE(s). 5. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE) BACKFILL REQUIREMENTS FOLLOW THE GUIDELINES OF AASHTO LRFD BRIDGE DESIGN (SEC 12) AND CONSTRUCTION (SEC 26) 1 MINIMUM TRENCH WIDTH MUST ALLOW ROOM FOR PROPER COMPACTION OF HAUNCH MATERIALS UNDER THE PIPE. THE MINIMUM TRENCH WIDTH (12.6.6.1): PIPEs12":D+16" PIPE > 12": 1.51D + 12" 1a MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE (12.6.6.2): PIPE K 24": 3.0D PIPE 24" - 144": D + 4'0" PIPE > 144": D + 10'0" 2 THE FOUNDATION UNDER THE PIPE AND SIDE BACKFILL SHALL BE ADEQUATE TO SUPPORT THE LOADS ACTING UPON IT (26.5.2). 3 BEDDING MATERIAL SHALL BE A RELATIVELY LOOSE MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, AND A MINIMUM OF TWICE THE CORRUGATION DEPTH IN THICKNESS, WITH THE MAXIMUM PARTICLE SIZE OF ONE-HALF OF THE CORRUGATION DEPTH (26.3.8.1, 26.5.3). 4 CORRUGATED STEEL PIPE (CSP / HEL-COR). 5 HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION (26.5.4). 5a INITIAL BACKFILL FOR PIPE EMBEDMENT TO MEET AASHTO A-1, A-2 OR A-3 CLASSIFICATION, OR APPROVED EQUAL, COMPACTED TO 90% STANDARD PROCTOR (T 99). MAXIMUM PARTICLE SIZE NOT TO EXCEED 3" (12.4.1.2). ALL LIFTS PLACED IN A CONTROLLED MANNER. IT IS RECOMMENDED THAT LIFTS NOT EXCEED AN 8" UNCOMPACTED LIFT HEIGHT TO PREVENT UNEVEN LOADING, AND THE LESSER OF 1/3 THE DIAMETER OR 24" AS THE MAXIMUM DIFFERENTIAL SIDE -TO -SIDE (26.5.4). 6 INITIAL BACKFILL ABOVE PIPE MAY INCLUDE ROAD BASE MATERIAL (AND RIGID PAVEMENT IF APPLICABLE). SEE TABLE ABOVE. 6a TOTAL HEIGHT OF COMPACTED COVER FOR CONVENTIONAL HIGHWAY LOADS IS MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT OR TOP OF RIGID PAVEMENT (12.6.6.3). 7 FINAL BACKFILL MATERIAL SELECTION AND COMPACTION REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER THE ENGINEER OF RECORD (26.5.4.1). NOTES. • GEOTEXTILE SHOULD BE CONSIDERED FOR USE TO PREVENT SOIL MIGRATION INTO VARYING SOIL TYPES (PROJECT ENGINEER). • FOR MULTIPLE BARREL INSTALLATIONS THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE PIPE DIAJ2 BUT NO LESS THAN 12", OR 36" FOR PIPE DIAMETERS 72" AND LARGER. • CONTACT YOUR CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING (TABLE C12.6.7-1). TYPICAL BACKFILL DETAIL NOT TO SCALE TEMPORARY COVER FOR CONSTRUCTION LOADS HEIGHT OF COVER CONSTRUCTION LOADS FINISHED GRADE FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRA AMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER THE TOP OF THE PIPE. THE HEIGHT -OF -COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. THE USE OF HEAVY CONSTRUCTION EQUIPMENT NECESSITATES GREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE COVER MINIMUMS FOR NORMAL HIGHWAY TRAFFIC. AXLE LOADS PIPE SPAN, INCHES (wPs) 18-50 1 50-75 1 75-110 1 110-150 MINIMUM COVER (FT) 2.0 2.5 3.0 3.0 12-42 48-72 3.0 3.0 3.5 4.0 78-120 3.0 3.5 4.0 4.0 126-144 3.5 4.0 4.5 4.5 "MINIMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL COVER REQUIRED TO AVOID DAMAGE TO THE PIPE. MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO THE TOP OF THE MAINTAINED CONSTRUCTION ROADWAY SURFACE. CONSTRUCTION LOADING DIAGRAM NOT TO SCALE 36"0 MAX., HS-25 ACCESS CASTING WITH GRADE RINGS AS REQUIRED, TO BE PROVIDED AND INSTALLED BY CONTRACTOR. MAY BE TOP MOUNTED COP PROTECTION (AS SHOWN) OR RECESSED. I RIM/FINISHED w a SLAB _ lY- ---- - GRADE VARIES 0 v d a _ d d d d. . i GASKET MATERIAL 0 CMP RISER a SUFFICIENT TO PREVENT a - SLAB FROM BEARING ON >_ w RISER TO BE PROVIDED BY CONTRACTOR. GB 11" TYP. SECTION VIEW ACCESS CASTING NOT SUPPLIED BY CONTECH c? 00 A 'Q #4 DIAGONAL TRIM BAR (TYP. 4 PLACES) SEE NOTE 7. i #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), ---� f--��-- -�, SEE NOTE 7. -- II I 2" COVER (TYP) IL--- i ( 0,l� L! <��L 1 �GCyQ OPENING IN PROTECTION SLAB FOR ACCESS INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. SPECIFICATION FOR CORRUGATED STEEL PIPE -ALUMINIZED TYPE 2 STEEL SCOPE HANDLING AND ASSEMBLY THIS SPECIFICATION COVERS THE MANUFACTURE AND SHALL BE IN ACCORDANCE WITH RECOMMENDATIONS OF THE INSTALLATION OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) THE PROJECT PLANS. UNDERGROUND DETENTION SYSTEM NOTES: INSTALLATION 1. TRASHRACKS SHALL BE INSTALLED ON ALL ORIFICES, MATERIAL INCLUDING THOSE LOCATED ALONG THE WEIR PLATE WITHIN SHALL BE IN ACCORDANCE WITH AASHTO STANDARD THE UNDERGROUND DETENTION SYSTEM. THE ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II 2. DETENTION SYSTEM's WEIR PLATE TO BE APPLICABLE REQUIREMENTS OF AASHTO M274 OR ASTM A929. OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS PRE -MANUFACTURED AND DELIVERED TO THE SITE. WEIR AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR PLATE SHALL BE BOLTED TO THE UNDERGROUND DETENTION PIPE CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE SYSTEM, OR SIMILARLY FASTENED TO ENSURE IT HAS A WITH THE SITE ENGINEER. SECURE CONNECTION. THE CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE 3. ANY RETAINING WALLS AND FOUNDATIONS CONSTRUCTED IN APPLICABLE REQUIREMENTS OF AASHTO M36 OR ASTM A760. THE IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO THE VICINITY OF THE UNDERGROUND DETENTION SYSTEM PIPE SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. SHALL BE REVIEWED AND APPROVED BY THE STRUCTURAL THE PROJECT PLANS. ENGINEER AND A GEOTECHNICAL ENGINEER. 4. THE PARKING LOT & ACCESS MANHOLES SHALL SERVE AS ALL FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE ALL FA RICATISTATES. ACCESS TO THE UNDERGROUND DETENTION SYSTEM. 5. CONTACT COLLINS ENGINEERING (434.293.3719) REGARDING ANY QUESTIONS CONCERNING THE UNDERGROUND DETENTION SYSTEM. 6. ALL FILL EMBANKMENT MATERIAL, TRENCH EXCAVATION & MATERIAL SPECIFICATION STONE BACKFILL SHALL BE IN ACCORDANCE WITH MINIMUM PIPE MANUFACTURER REQUIREMENTS. NOT TO SCALE 7. VDOT STD. IS-1 & ST-1 ARE REQUIRED ON THE UNDERGROUND DETENTION SYSTEM STRUCTURES, INCLUSIVE OF THE BYPASS STRUCTURES. S. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL TEST -DIG AT THE EXISTING INLETS & OUTFALLS TO �1'-4' 2y2" CONFIRM THE INVERTS AND TO ENSURE THE PROPOSED GRADES CAN BE ACHIEVED. CONTRACTOR SHALL CONTACT COLLINS ENGINEERING OF ANY DISCREPANCIES IN THE HORIZONTAL OR VERTICAL ALIGNMENT PRIOR TO ORDERING ALL STEEL PER AND CONSTRUCTION. 3/4 (#6) REBAR CAN BE CUT FLUSH - a ASTM A36 9. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION TO OUTSIDE OF RAIL MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION (BAR LENGTH = 16%q) OR BAR CAN 4 > INDUSTRY (29 CFR PART 1926). EXTEND BEYOND RAILY2"± ~ FABRICATION TOLERANCE: ty" _ a FLAT BAR AND REBAR: MILL TOLERANCE APPLIES 6 TYP 3/8 12" TYP. CENTER TO CENTER /e" HOLE w/ %7 REBAR RUNG, RUNG SPACING m WELD REBAR TO RUNG ON OUTSIDE OF STEEL RAIL 0 2Y2" x %" FLAT BAR SIDE RAIL PLAN SIDE NOTES: 1. LADDERS CAN BE MADE IN 2W-0" STANDARD LENGTHS AND CUT TO FIT 2. ALL MATERIAL TO MEET ASTM A36 3. LADDER TO BE HOT DIPPED GALVANIZED PER ASTM A-123 AFTER FABRICATION IS COMPLETE STANDARD LADDER DETAIL NOT TO SCALE PART NO. HALAGVL16 PROVIDE MINIMUM OF 4 ATTACHMENT ANGLES (2 ON EITHER SIDE OF LADDER RAIL) TO CONNECT LADDER TO RISER EXTENSION RISER w/ LADDER AND STEPS IF EXTENSION IS REQUIRED J L_ RISER w/ LADDER 2--6" AND STEPS -PIPE (_- PLAN FRONT 48"0 to 90"0 FITTING REINFORCEMENT MAY BE REQUIRED BASED ON HEIGHT OF COVER AND LIVE LOAD CONDITION TYPICAL MANWAY DETAIL MAINLINE CMP 23xY2,5x1,3x1,ETC. NOTE: THIS DRAWING IS INTENDED TO APPLY TO LADDERS INSTALLED IN RISERS HAVING A DIAMETER OF 30" OR LARGER. DUE TO SPACE CONSTRAINTS AND LIMITED ACCESSIBILITY, THE PRACTICALITY AND SUITABILITY OF UTILIZING RISERS SMALLER THAN 30" DIAMETER AND/OR INCORPORATING LADDERS IN THESE SMALLER DIAMETER RISERS SHOULD BE ADDRESSED BY THE OWNER AND PROJECT ENGINEER V-6" MAX. L5" x 3" xy" x 16" LONG AT V-0" SPACING. LONG LEG TO PROJECT OUT. WELD TOP AND BOTTOM OF 3" LEG TO EACH CORRUGATION CREST (THESE ANGLES SHOULD BE USED FOR LARGER DIAMETER MAINLINES WHERE ADDITIONAL STEPS ARE NEEDED) --- II .,I ♦ i I�� II I I I L OPENING IN PROTECTION SLAB FOR ACESS STANDARD STANDARD REINFORCING, REINFORCING, SEE TABLE SEE TABLE ROUND OPTION PLAN VIEW NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION AND ACI 350. 2. DESIGN LOAD HS25. 3. EARTH COVER = V MAX. 4. CONCRETE STRENGTH = 4,000 psi 5. REINFORCING STEEL = ASTM A615, GRADE 60. 6. PROVIDE ADDITIONAL REINFORCING AROUND OPENINGS EQUAL TO THE BARS INTERRUPTED, HALF EACH SIDE. ADDITIONAL BARS TO BE IN THE SAME PLANE. 'NOTE: WHEN RISER EXTENSIONS ARE USED, THE PLANT SHOULD CUT 3" FROM THE SIDE RAILS AS SHOWN "3" FROM BOTTOM OF LADDER RAIL TO RISER JOINT "3" FROM TOP OF LADDER RAIL TO RISER JOINT LADDER RAILS AND RUNGS (2)Y4" FILLET WELDS 1" LONG ATTACHMENT ANC MINIMUM OF 4 ANGLES P LADDER SECTION, (2 EACH SIDE LADDER) 6' MAX. SPACI VERTICAL 6" FROM RUNG TO RISER JOINT 6" FROM RUNG TO RISER JOINT SECTION A -A RISER LADDER DETAIL NOT TO SCALE RISER NORMALLY CMP WITH 22/3' x y" CORRUGATIONS (4)Y6" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELD EACH SIDE) LYx3"xi6" 5Yz " LONG REINFORCING TABLE "'BEARING O CMP A B 0 REINFORCING PRESSURE RISER (PSF) 24" q'0 26" #5 @ 10- OCEW 2,540 4'x4' #5 @ 10- OCEW 1,900 30" 4'-6"9i 32" #5 @ 10" OCEW 2,260 4'-0" x 4'-6" #5 @ 9" OCEW 1,670 36" 5'0 38" #5 @ 9" OCEW 2,060 V x 5' #5 @ 8" OCEW 1,500 42" 5'-6"0 #5 @ 8" OCEW 1,490 51-6" x 5'-6" #5 @ 8" OCEW 1,370 48" 8'0 S0" #5 @ 7" OCEW 1,210 6' x 6' #5 @ 7" OCEW 1,270 n SQUARE OPTION PLAN VIEW 7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND BARS A MINIMUM OF 12" BEYOND OPENING, BEND BARS AS REQUIRED TO MAINTAIN BAR COVER. 8. PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED BY CONTRACTOR. 9. DETAIL DESIGN BY DELTA ENGINEERS, ARCHITECTS AND LAND SURVEYORS, ENDWELL, NY. MANHOLE CAP DETAIL NOT TO SCALE (4)y6" FILLET WELDS FROM EACH ANGLE CORRUGATION CREST (2 WELDS EACH SIDE) (4) L3" x 3" x 3/16" 5Y2" LONG (2)Y4" FILLET WELDS 1" LONG FROM EACH ANGLE TO LADDER RAIL (4)Y6" FILLET WELDS FROM EACH ANGLE TO CORRUGATION CREST (2 WELDS EACH SIDE) L3" x 3" x i6" 5y" LONG I ` r LADDER RAILS AND RUNGS �W1,11i t_ H ELEVATION LADDER AND RUI iCOTT7R. 05-LLINS7 Lic. No. 0357911 1/8/21 z a 0 LL Z_/j CN J � G H > Lu 0 W N 016 O 0 ( v � u) W N zLLJ Q C z Z> J� W _ J I-q Q z i cn Q ILL j 0 � Q 1-4 Ljj W Ln U' � z 0 z w W ~ I - -A Zu LLJ C) ID _W W J� o� J W z o O Q ate' > Z) 0 a O w a w cn JOB NO. 202193 SCALE AS SHOWN SHEET NO. 10