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Home My WebLink AboutWPO201700024 Plan - VSMP WPO VSMP 2017-02-05LEGEND EXIST NEW DESCRIPTION x 125 TC TOP OF CURB ELEVATION . x 125- SPOT ELEVATION r >° x 125 TW TOP OF WALL ELEVATION x 125BW BOTTOM OF WALL ELEVATION BENCHMARK STORM SEWER ,.:....,... RD ROOF DRAIN .=_ SEWER LINE to W WATER LINE - - GAS GAS LINE OHE OVERHEAD ELECTRIC WIRE - UGE UNDERGROUND ELECTRIC _.....z'., OHT OVERHEAD TELEPHONE LINE UGT UNDERGROUND TELEPHONE LINE PROPERTY LINE ADJACENT PROPERTY LINE VACATED PROPERTY LINE _ BUILDING SETBACK 1 I' DRAIN INLET (DI) 0 O 0 SANITARY MANHOLE _ C PLUG ® WATER VALVE & BOX FIRE HYDRANT ®"" WATER METER LIGHT POLE -#- UTILITY POLE SANITARY EASEMENT _-__..__.......... _ -- — GRADING EASEMENT DRAINAGE EASEMENT UTILITY EASEMENT _._._-_ .._.....__._._. WATER EASEMENT ____.. _ .-.....w... ACCESS EASEMENT STORM DRAINAGE EASEMENT TREE LINE FENCE STREAM PH1 PROPOSED =— 12 —--.-µ----- 12 - INTERVAL CONTOUR oo — oo - INDEX CONTOOR CG -2 STANDARD 6" CURB CG -6 COMBINATION 6" CURB & GUTTER a_-_.-.-----_-. _-..-----.- CONCRETE PAVEMENT / xxxxx SIDEWALK . Y ..:.. .......: RIPRAP ASPHALT GRASS EC -2 MATTING EC -3 MATTING WETLAND to io PARKING COUNT CROSSWALK HANDICAP ACCESSIBLE AISLE _.....z'., /F CG -12 HANDICAP PARKING NOTE: 1. THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT IS SHOWN. V5MF FLANS FOR CME5TERfIELD LANDING PHASE 2 WF0201700024 TAX IM) F 56, PARCEL 35 WHITE HALL DISTRICT, ALBEMARLE COUNTY, VIRGINIA VICINITY MAP SCALE: 1 2,000' Q mss � xxxxx IMAGE PROVIDED BY GOOGLE MAPS SHEET INDEX C1 - COVER SHEET C2 - EX15TING CONDITION5 � DEMO FLAN C3 - 51TE OVERVIEW C4 - 51TE PLAN C5 - 51TE PLAN G(' 1 ANf)gGAPI I\IG PLAN N C7 - i A�►�AP G AND SITE DETAIi 5 Cf', - 01150W [DRIVE -El� LI AWD P[ZCDDE_1I F (' I (l _ \ DTF12I C 13 - 5TO RM P RO F I LE5 C 14 - 5TORMWATER MANAGEMENT DETAI L5 C 1 5 - EK0510N * 5EDIJIMENT CONTROL NARRATIVE C I G - STAGE I EK0510N 5EDIMENT CONTROL PLAN C 17 - STAGE II EK0510N 5EDIMENT CONTROL PLAN C 18 - EK0510N * 5EDIMENT CONTROL DETAILS C21 - DRAINAGE PLAN PROPERTY INFORMATION OWNER/DEVELOPER: SM CHARLOTTESVILLE, LLC 200 GARRETT ST, SUITE B CHARLOTTESVILLE, VA 22902 LEGAL REFERENCE: DB 4968 PG 476 AREA SUMMARY TMP 56-35 ......................... 17.70 Ac DISTURBED AREA - .................. 7.17 Ac NEW CONSERVATION ESMT ..... 8.12 Ac BASE INFORMATION SOURCE OF BOUNDARY SURVEY: ROGER W. RAY AND ASSOCIATES BOUNDARY SURVEY DATED 04/20/2015. SOURCE OF TOPOGRAPHY: BELL LAND SURVEYS AERIAL IMAGERY DATED 03/29/2015. FIELD VERIFIED BY JUSTIN SHIMP, P.E., ON 05/03/2017. BENCHMARK(S): NAVD88, MARKER ON ROUTE 240 PER PLAN NAD83 VIRGINIA STATE PLANE SOUTH WATER SOURCE: ALBEMARLE COUNTY SERVICE AUTHORITY SEWER SERVICE: ALBEMARLE COUNTY SERVICE AUTHORITY THIS PROPERTY IS ZONED: R1 - RESIDENTIAL SEE DB 4788 PG 244 FOR PHASE 1 PLAT. MINIMUM BUILDING SETBACKS (SEE SUBDIVISION NOTES): FRONT: 25' SIDE: 10' REAR: 20' VSMP NOTES STORMWATER QUALITY SHALL BE ADDRESSED BY DISCHARGING SHEETFLOW TO A CONSERVATION AREA WITH C/D SOILS, AS COMPUTED IN THE VRRM. CHANNEL PROTECTION: STORMWATER SHALL BE DISCHARGED THROUGH LEVEL SPREADERS TO ENSURE SHEET FLOW. FLOOD PROTECTION: STORMWATER SHALL BE DISCHARGED TO MANMADE STORMWATER CONVEYANCE SYSTEMS THAT CONFINE THE 10 -YEAR 24-HOUR STORM WITHIN THE SYSTEM. THE LIMITS OF ANALYSIS ARE THE 100 -YEAR FLOODPLAIN. THESE MEASURES COMPLY WITH 9VAC25-870-66-C1 AND C3c. PHASING This is the second phase of the Chesterfield Landing project. Phase 1 was approved in WPO 2015 00037. APPROVED by the Albemarle County (,ernmurlity Development (Department F i l e N 4 io 170004,W-_.____ J1 -Y -II M. SHIMP > Llc. 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W CD 77� - -------- tN 'ED ----- ---------- - - --------- -- 650 . . .... CD ccr PRO S ED______ ----------------------- G R�ADE- L9 645 10b.49LF -HDIPE-4-0,94% --- - ------- D cD ... ........... ... . - - ---- 15' -,,HDPE B C) c) -0:8-1-% 640 co �n ........ ... . ------------------- - - - .... . ..... - -- - ------ ... ..... . K,7 -- --- --- - --- - - - - __,_,_�':__,__.,.,� - - ------------ - ------ - ----- I_. ............... 635 10+00 10*50 11+00 11+50 (a:�STOBA SEWER PROFILE: STM Dt-D4 SCALE: 1"=20' Horizontal, C=ff Vertical 660 655 650 645 640 635 630 625 620 615 610 605 600 595 590 585 580 A75 -` 0�35 12+ 09 C j S/T M. SHIMP (LA 4 518 3 r170 665 660 -t.,fxCQ .......... C_� + 655 �_,MIN. r77 ........... 650 SEPAPADON ... . ...... (D 645 ,typ =D 640 -` 0�35 12+ 09 C j S/T M. SHIMP (LA 4 518 3 r170 / ?EN t / 3357 Sf VAMGM``�10N 1 1 , z . LEVEL SPREADER E D.A.-1.97 AC 4�Y x N 7774 Ft,00DPLA11 I i f s'• EC 2 M> TR, z y j>J 74 7$74 110 SF ,. !ALO T. ff, \Forebay \ PRIVATE SWM FACILITY 771 is 015 MAINTENANCE EASEMENT JUS;!%IN M. SHIM? > I I Vic. ' o,,.4j 183 SS ZONAL L� 80§11 / EEE 3" LAYER OF - #57 STONE 3' WIDE STRIP OF FILTER FABRIC o LEVEL SPREADER LIP o CD RIP RAP SCC - • .,_- -, fes:.-�._,'dxF,,.- .. ' ;' CLASS I RIP RAP r • U U Th N (9.b. SHEETFLOW TO CONSERVATION AREA WITH C/D SOILS). SINCE THERE ARE NO EXISTING CHANNELS TO C soils Impervious Forebay Accum. Length 12 Velocity Flow 2 DETAIL Outfall (sf) (sf) AC (ft) (in/hr) Q2 (in/hr) Depth C14 SCALE: r=2' E1 53,112 106 1,32 17 5.17 6.83 0.31 0.26 20 0 20 40 60 STORM OUTFALL AND SWM NARRATIVE not1 lV STORMWATER IS COLLECTED IN A SYSTEM OF DROP INLETS AND HDPE PIPE AND DISCHARGED THROUGH A LEVEL SPREADER E PLAN Scale: 1"-20' -- ------ LEVEL SPREADER INTO SHEET FLOW THROUGH OPEN SPACE THAT WILL BE PROTECTED THROUGH DEEDS AND C14 RESTRICTIONS. THIS WILL ACHIEVE ALL REQUIRED PHOSPHOROUS REMOVAL, AS COMPUTED IN THE VaRRM (�P, JjQ 40. LEVEL SPREADER D DA. -0.44 AC `- /---13.0------- I \ / 3.0' ,, .6„ JEATED / 42-ItBER 42' / 435 ~ 'EC r2 MATTIiV`:, 15 5 f s / \ 430 -- . 432 � / D1 \ / PRIVATE 20' SWM FACILITY & MAINTENANCE / EASEMENT 5 LEVEL SPREADER D PLAN C14 -- SCALE: I"=10' Site Land Cover Summary (9.b. SHEETFLOW TO CONSERVATION AREA WITH C/D SOILS). SINCE THERE ARE NO EXISTING CHANNELS TO C soils CONVEY SITE RUNOFF TO LICKINGHOLE CREEK, AND STORMWATER CONVEYANCE CHANNELS CANNOT BE Forestlopen (acres) CONSTRUCTED INSIDE THE FLOODPLAIN, STORMWATER MUST BE RELEASED AS SHEET FLOW. NOTE: SPREADER 0.00 B HAS BEEN SLIGHTLY CHANGED IN PHASE II. THIS SPREADER WILL BE KEPT FOR THE NEW DRAINAGE 0.00 AREA, WHICH IS 0.69 AC LESS THAN THE ORIGINAL DESIGN. THIS TRANSLATES TO AN INCOMING RUNOFF 17.10 THAT IS 0.40 CFS LESS THAN THE ORIGINAL DESIGN. DUE TO THESE CONDITIONS, THE ORIGINAL DESIGN 1.17 0.25 FOR SPREADER B MEETS REGULATORY CRITERIA AND REMAINS ADEQUATE FOR STORMWATER MANAGEMENT. Site Land Cover Summary s Cover Site Tv and Land Cover Nutrient Loads 0.00 6.20 0.00 1 0.00 6.24 38.65 Site Rv A soils P Solis C soils D Solis Totals % of Total Forestlopen (acres) 5.58 5.45 4.31 0.00 15.35 40 !Managed Turf (acres) 0.00 15.98 1.12 0.00 17.10 44 s Cover Site Tv and Land Cover Nutrient Loads 0.00 6.20 0.00 1 0.00 6.24 38.65 Site Rv 0.25 Treatment Volume(ft3 35,488 TP Load (lb/yr) 22.30 TN Load (ib/yr) 159.51 Total TP Load Reduction Required 6.45 (lb/Yr) Site Compliance Summary (Total Runoff Volume Reduction (ft) 11,825 Total TP Load Reduction Achieved 742 fib/yr) ;Velocity Total TN Load Reduction Achieved 53.09 (Ib/yr) 47 Remaining Post Development TP Load 1488 {rb/yrj 0.23 Remaining TP Load Reduction (lblyr) G J0 Required 71,602 TARGET TP REDUCTION E,'(T_EDED BY 0,97 LB/` EAR " 6 VRRM COMPLIANCE SUMMARY C14 SCALE: 1"=10' Forebay = 0.002 x Impervious VRRM TV=4745 cf Length = 13 x AC x 1 in/hr = Weir Width Channel Slope = 0-02 per ELS spec Q _ Cts *L *H3/2 Mannings "n" = 0-07 for dense grass Updated Level Spreader B: 8.04 AC Treated Flow depth computed with weir formula given in feet (Outfall Impervious Forebay Accum. (sf) (sf) AC Length (ft) 12 (in/hr) Q2in/hr) ;Velocity Flow Depth B1 80124 178 3.64 47 3.32 12.101.13 48 0.23 VHHM IV= 11418 cf Spreaders from Phase 1 B: 8.73 AC Treated C: 4.67 AC Treated Outfall Impervious (sf) Forebay (sf) Accum, AC Length (ft) 12 (inlhr) Q2 Velocity Flow (in/hr) Depth B1 80,604 161 3.73 48 3-41 12-71 1.13 023 C1 71,602 143 2.39 31 5.00 11,94 1.17 0.25 Spreader B TV= 11375 cf Spreader C TV cf 4 LEVEL SPREADER COMPUTATIONS NO SCALE CONSTRUCTION SEQUENCE 16 -NO CLEARING, GRADING OR HEAVY EQUIPMENT ACCESS IS ALLOWED EXCEPT TEMPORARY DISTURBANCES 14o ASSOCIATED WITH INCIDENTAL UTILITY CONSTRUCTION, RESTORATION OPERATIONS OR MANAGEMENT OF NUISANCE VEGETATION. -THE PERIMETER OF THE CONSERVED OPEN SPACE SHALL BE PROTECTED BY SUPER SILT FENCE, CHAIN LINK FENCE, ORANGE SAFETY FENCE, OR OTHER MEASURES TO PREVENT SEDIMENT DISCHARGE. -THE LIMITS OF DISTURBANCE SHOULD BE CLEARLY SHOWN ON ALL CONSTRUCTION DRAWINGS AND IDENTIFIED AND PROTECTED IN THE FIELD BY ACCEPTABLE SIGNAGE, SILT FENCE, SNOW FENCE OR OTHER PROTECTIVE BARRIER. -CONSTRUCTION OF THE GRAVEL DIAPHRAGM OR ENGINEERED LEVEL SPREADER SHALL NOT COMMENCE UNTIL THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED AND PERIMETER E&S CONTROLS HAVE BEEN REMOVED AND CLEANED OUT. MAINTENANCE ALL STORMWATER BMPs MUST RECEIVE REGULAR MAINTENANCE TO FUNCTION AS INTENDED. MAINTENANCE OF LEVEL SPREADERS INVOLVES REMOVING TRASH AND DEBRIS AND REMOVING SEDIMENT AND SOLIDS FROM THE FOREBAY AND BLIND SWALE. TRASH AND DEBRIS TEND TO COLLECT IN THE SPLITTER BOX, FOREBAY, AND BLIND SWALE. SEDIMENT IN THE DIVERSION BOX, FOREBAY, AND BLIND SWALES SHOULD BE REMOVED ON A YEARLY BASIS OR AFTER EACH 2 -YEAR, 24-HOUR EVENT. MAINTENANCE INSPECTIONS SHOULD BE CONDUCTED ANNUALLY TO TRIGGER MAINTENANCE OPERATIONS SUCH AS SEDIMENT REMOVAL, SPOT RE -VEGETATION, AND LEVEL SPREADER REPAIR. IDEALLY, INSPECTIONS SHOULD BE CONDUCTED IN THE NON -GROWING SEASON WHEN IT IS EASIER TO SEE THE FLOW PATH. FOR THE MAINTENANCE OF CONSERVED OPEN SPACE, NO TREES SHALL BE REMOVED OR DISTURBED. BUSH HOG NO MORE THAN 4 TIMES PER YEAR. PERMANENT SEEDING SPECIFICATIONS PS February 16 through April 30: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. Add 20 lbs/acre of Crownvetch and reduce Kentucky 31 Fescue to 108 lbs/acre when slopes are greater than 3:1. May 1 through August 15: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Foxtail Millett - 20 lbs/acre. Add 20 lbs/acre of Crownvetch and reduce Kentucky 31 Fescue to 108 lbs/acre when slopes are greater than 3:1. August 16 through October 31: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. Add 20 lbs/acre of Crownvetch and reduce Kentucky 31 Fescue to 108 lbs/acre when slopes are greater than 3:1. November 1 through February 15: Kentucky 31 Fescue - 128 lbs/acre; Red Top Grass - 2 lbs/acre; Winter Rye - 20 lbs/acre. Add 20 lbs/acre of Crownvetch and reduce Kentucky 31 Fescue to 108 lbs/acre when slopes are greater than 3:1. MULCHING SPECIFICATIONS: Straw or hay at a rate of 2 tons/acre. Must be anchored. Spread with mulch blower or by hand. LIME AND FERTILIZER SPECIFICATIONS: Lime and fertilizer needs should be determined by soil tests. Soil tests may be preformed by the Cooperative Extension Service Soil Testing Laboratory at VPI&SU, or by a reputable commercial laboratory. Information concerning the State Soil Testing Laboratory is available from County Extension Agents. Under unusual conditions where it is not possible to obtain a soil test, the following soil amendments will be applied: For Permanent Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 1,000 lbs. per acre of 10-20-10 (23 lbs. per 1,000 square feet) or equivalent. For Temporary Seeding: Seeded areas shall be limed at a rate of 2 tons per acre, and fertilized at a rate of 600 lbs. per acre of 10-20-10 (14 lbs. per 1,000 square feet) or equivalent. ,.1 PERMANENT SEEDING PS C15 Nat To Scale ORGANIC MULCH MATERIALS AND APPLICATION RATES SLOPES RATES: DEPTH MULCHES: NOTES: 25 TO 45 B MORE THAN 80" Per Acre Per 1000 sq. ft. PERCENT Straw or Hay 11- 2 tons 70 - 90 lbs. Free from weeds acid coarse 2 TO 7 (Minimum 2 MORE THAN 80" matter. Must be anchored. tons for Spread with mulch blower or winter cover) by hand. Fiber Mulch Minimum 35 tbs. Do not use as mulclh for 1500 lbs. POORLY DRAINED winter cover or during hot, 7 TO 15 g MORE THAN 80" dry periods.1° Apply as CLAY LOAM PERCENT slurry. Corn Stalks 4 - 6 tons 185 - 27.5 lbs. Cut or shredded in 4-641 MORE THAN 80" WELL DRAINED CLAY LOAM lengths. Air-dried. Do not use in fine turf aerats. Apply with mulch blower, or by hand. Wood Chips 4 - 6 tons 185 - 275 tbs. Free of coarse matter. Air- dried. Treat with 112 lbs nitrogen per ton. Do not use in fine turf areas. Apply with mulch blower, chip handler, or by hand. Barb Chips 50 - 70 cu. 1-2 cu. yds. Free of coarse matter. Air - or yds. dried. Do not use in fine Shredded turf areas. Apply with Bark mulch blower, chip handler, or by hand. x When fiber mulch is the only available mulch during periods when straw should be used, apply at a minimum rate of 2000 lbs./ac. or 45 lbs./10100 sq. ft. Source:a. WSCKMULCHING MU 1 Not To Scale TABLE 3.31-B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" Rate Planting Dates Species lbs. acre Sept. 1 - Feb. 15 Feb. 16 - Apr. 30 May 1 - Aug 31 Source: Ya. DSWC 50/50 Mix of Annual Ryegrass (Lolium multi-florum & Cereal (Winter) Rye (Secale cereale) Annual Ryegrass (Lolium multi-florum) German Millet (Setaria italica) r3`TEMPORARY SEEDING TS) gNot To Scale PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION PROJECT DESCRIPTION THIS SITE IS A PROPOSED 43 LOT BY -RIGHT SUBDIVISION, WITH 18 LOTS INCLUDED IN PHASE 2. THE TOTAL AREA OF DISTURBANCE IS 7.17 ACRES. EXISTING SITE CONDITIONS ALL WORK SHALL BE COMPLETED ON THE SUBJECT PARCEL, ALBEMARLE COUNTY TMP 56-35. SUBJECT PARCEL IS OWNED BY SM CHARLOTTESVILLE LLC ON-SITE SLOPES ARE MOSTLY STEEP, AVERAGING ABOUT 15%. THIS SITE WAS PREVIOUSLY A SINGLE FAMILY RESIDENCE. ADJACENT PROPERTIES THIS PROPERTY IS BORDERED TO THE NORTH BY A RESIDENTIAL DEVELOPMENT OWNED BY SM CHARLOTTESVILLE LLC, TO THE EAST BY A MULTIFAMILY RESIDENTIAL AREA OWNED BY CORY FARM HOMEOWNERS ASSOCIATION, TO THE SOUTH BY A SINGLE FAMILY RESIDENCE OWNED BY PAMELA & ROY TOMBS, AND TO THE WEST BY A MULTIFAMILY RESIDENTIAL AREA OWNED BY CROZET MEADOWS, L.P. SOILS THIS SITE CONTAINS THE FOLLOWING SOIL TYPES BASED ON NRCS SOIL MAPS FOR ALBEMARLE COUNTY VIRGINIA: SOIL SLOPES HSG DEPTH PERMEABILITY 4E ASHE LOAM 25 TO 45 B MORE THAN 80" EXCESSIVELY PERCENT DRAINED 7B BRADDOCK LOAM 2 TO 7 B MORE THAN 80" WELL DRAINED PERCENT 16 CHEWACLA SILTBSD MORE THAN 80" SOMEWHAT LOAM POORLY DRAINED 37C3 HAYESVILLE 7 TO 15 g MORE THAN 80" WELL DRAINED CLAY LOAM PERCENT 37D3 HAYESVILLE 15 TO 25 g MORE THAN 80" WELL DRAINED CLAY LOAM PERCENT OFFSITE AREAS: THERE ARE NO OFFSITE ACTIVITIES ASSOCIATED WITH THIS PROJECT. EXCESS MATERIAL SHALL BE HAULED TO A SITE WITH AN APPROVED EROSION AND SEDIMENT CONTROL PLAN. CRITICAL AREAS THERE ARE NO CRITICAL EROSION AREAS ON THE SUBJECT PARCEL. EROSION & SEDIMENT CONTROLS 1. SAFETY FENCE: A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. STD. AND SPEC. 3.01. 2. CONSTRUCTION ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENTRANCE, AS NECESSARY, THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.02 AND CONFORMS WITH THE REQUIREMENTS OF THE EROSION & SEDIMENT CONTROL PLAN. 3. SILT FENCE: INSTALL AND MAINTAIN SILT FENCE THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.05. THIS SILT FENCE SHALL BE INSTALLED AS SHOWN ON THE EROSION & SEDIMENT CONTROL PLAN AND ACCOMPANYING DETAILS FOR THE PURPOSE OF INTERCEPTING SILT -LADEN RUNOFF BEFORE IT IS DISCHARGED FROM THE SITE. THE SILT FENCE SHALL BE INSPECTED AND MAINTAINED TO ENSURE CONTINUED PERFORMANCE. 4. TEMPORARY FILL DIVERSION: A CHANNEL WITH A SUPPORTING RIDGE ON THE LOWER SIDE, CONSTRUCTED ALONG THE TOP OF AN ACTIVE EARTH FILL CONSTRUCTED IN ORDER TO DIVERT RUNOFF AWAY FROM THE UNPROTECTED FILL SLOP TO A STABILIZED OUTLET OR SEDIMENT TRAPPING STRUCTURE; APPLICABLE WHERE THE AREA AT THE TOP OF THE FILL DRAINS TOWARD THE EXPOSED SLOPE AND CONTINUOUS FILL OPERATIONS MAKE THE USE OF A TEMPORARY DIVERSION DIKE INFEASIBLE; MAXIMUM EFFECTIVE LIFE IS ONE WEEK. STD. AND SPEC. 3.10. 5. TEMPORARY SEDIMENT TRAP: A TEMPORARY SEDIMENT TRAP SHALL BE INSTALLED PER THE EROSION AND SEDIMENT CONTROL PLAN FOR THE PURPOSE OF DETAINING SEDIMENT AND SILT WITHIN STORM WATER RUNOFF. THE TRAPS SHALL REMAIN IN PLACE UNTIL THE SITE IS STABILIZED UNLESS OTHERWISE NOTED ON THE PLAN. 6. TEMPORARY SEEDING: TEMPORARY SEEDING SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY OR MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. TEMPORARY SEEDING SHALL BE APPLIED IN CONFORMANCE WITH STD. AND SPEC. 3.31. 7. PERMANENT SEEDING: ALL DITCHES AND ADJACENT AREAS WITHIN 15 FT OF THE EDGE OF THE DITCHES SHALL BE SEEDED IN CONFORMANCE WITH STD. AND SPEC. 3.32. PERMANENT SEEDING SHALL BE APPLIED TO AREAS DELINEATED ON THESE PLANS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. PERMANENT SEEDING STABILIZES DISTURBED AREAS AND ENHANCES THE BEAUTY OF THE SITE. 8. DUST CONTROL: CONDUCT DUST CONTROL OPERATIONS NECESSARY TO MET THE REQUIREMENTS OF STD. & SPEC. 3.39 AS REQUIRED TO CONTROL SURFACE AND AIRBORNE MOVEMENT OF DUST. 9. TEMPORARY DIVERSION: TEMPORARY DIVERSION SHALL BE INSTALLED AS SHOWN ON THE EROSION AND SEDIMENT CONTROL PLAN AND DETAILS. THE DIVERSIONS SHALL BE INSTALLED PRIOR TO SIGNIFICANT LAND DISTURBING ACTIVITIES AND SHALL REMAIN IN PLACE UNTIL THE SITE IS STABILIZED UNLESS OTHERWISE NOTED ON THE PLAN. 10. INLET PROTECTION: A STONE WEIR SHALL BE INSTALLED AS A SEDIMENT FILTER LOCATED AT THE PROPOSED DROP INLET. REFER TO DETAILS ON SHEET C11. 11. OUTLET PROTECTION: RIP -RAP SHALL BE PROVIDED AT THE OUTFALL OF CONVEYANCE CHANNELS, CULVERTS, AND STORM SEWERS, STORM WATER MANAGEMENT: 50- 100 THIS SITE IS NOT SUBJECT TO ENERGY BALANCE ANALYSIS, PER SUBSECTION B OF 9VAC25-870-66, AS STORMWATER IS DISCHARGED AS SHEET FLOW. ALL STORMWATER IS DISCHARGED INTO A MAPPED FLOODPLAIN. THE TOTAL CHESTERFIELD LANDING SITE EXCEEDS NUTRIENT REMOVAL REQUIREMENTS BY 0.97 LBS/YEAR VIA DISCHARGING STORMWATER AS SHEET 60- 100 FLOW TO OPEN SPACE. THIS WILL BE ACHIEVED THROUGH THE CONSTRUCTION OF LEVEL SPREADER E AND THE DEDICATION OF 8.12 ACRES OF PARCEL 35 TO A CONSERVATION EASEMENT. 50 THESE NEW MEASURES ARE ADDED ON TO PHASE 1 MEASURES, WHICH INCLUDED EXISTING SPREADERS B & C AND THE EXISTING 7.23 ACRES OF CONSERVATION EASEMENT WITHIN PARCEL 36. A TOTAL OF 3 LEVEL SPREADERS AND 15.35 ACRES OF OPEN SPACE IS REQUIRED TO MEET COMPLIANCE FOR PHASES 1 & 2. GENERAL NOTES 1. ALL ELEVATIONS INDICATED REFER TO SITE DATUM OF NAVD88. 2. THE INFORMATION AND DATA SHOWN OR INDICATED WITH RESPECT TO THE EXISTING UNDERGROUND UTILITIES AT OR CONTIGUOUS TO THE SITE ARE BASED ON INFORMATION AND DATA FURNISHED TO THE OWNER AND ENGINEER BY THE OWNERS OF SUCH UNDERGROUND FACILITIES OR OTHERS. THE OWNER OR ENGINEER SHALL NOT BE RESPONSIBLE FOR THE ACCURACY OR COMPLETENESS OF SUCH INFORMATION OR DATA. THE CONTRACTOR SHALL HAVE FULL RESPONSIBILITY FOR CONFIRMING THE ACCURACY OF THE DATA, FOR LOCATING ALL UNDERGROUND UTILITIES, FOR COORDINATION OF THE WORK WITH OWNERS OF SUCH UNDERGROUND UTILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION THEREOF AND REPAIRING ANY DAMAGE THERETO RESULTING FROM THE WORK. ALL OF THESE CONDITIONS SHALL BE MET AT NO ADDITIONAL COST TO THE OWNER. THE CONTRACTOR SHALL CONTACT "MISS UTILITIES" OF VIRGINIA AT 1-800-552-7001 PRIOR TO THE START OF WORK. 3. WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, ETC., THE CONTRACTOR SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM DAMAGE. REPLACEMENT OF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE. 4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTING ALL EXISTING SITE STRUCTURES FROM DAMAGE AND COORDINATING WORK SO THAT THE OWNER CAN MAKE NECESSARY ARRANGEMENTS TO MODIFY/PROTECT EXISTING STRUCTURES FROM DAMAGES. 5, THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING ALL UTILITY OWNERS, ADJACENT LAND OWNERS WHOSE PROPERTY MAY BE IMPACTED AND THE VIRGINIA DEPARTMENT OF TRANSPORTATION PRIOR TO COMPLETING ANY OFF-SITE WORK. 6, CONTRACTOR SHALL NOTIFY AND COORDINATE ALL WORK INVOLVING EXISTING UTILITIES WITH UTILITY OWNERS, AT LEAST 72 HOURS PRIOR TO THE START OF CONSTRUCTION. 7. CONTRACTOR SHALL IMMEDIATELY REPORT ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE OWNER AND ENGINEER. 8. CONTRACTOR SHALL SUBMIT FOR THE APPROVAL OF THE OWNER SUBMITTALS OF ALL SPECIFIED MATERIALS LISTED IN THE PLANS, TO INCLUDE SHOP DRAWINGS, MANUFACTURER'S SPECIFICATIONS AND LABORATORY REPORTS. THE OWNER'S APPROVAL OF SUBMITTALS WILL BE GENERAL AND WILL NOT RELIEVE THE THE CONTRACTOR FROM THE RESPONSIBILITY OF ADHERENCE TO THE CONTRACT AND FOR ANY ERROR THAT MAY EXIST. GENERAL EROSION AND SEDIMENT CONTROL NOTES: 1. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 2. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 3. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 4. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 5. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 6. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 7. DURINC DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 8. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 9. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA. 10. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS, 11. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION 5.1.28. 12, ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE. 13. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM. 14. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE. 15. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY. 16. 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 RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 17. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 18. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 19. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. 20. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.) 21. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER PROTECTION ORDINANCE SECTION 17-207B) MANAGEMENT STRATEGY AND SEQUENCE OF CONSTRUCTION THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION STAGE 1 1. INSTALL CONSTRUCTION ENTRANCE. 2. CONSTRUCT SEDIMENT TRAPS WITH ASSOCIATED DIVERSIONS AND SILT FENCE. 3. CONTACT THE ENGINEER AND ALBEMARLE COUNTY FOR INSPECTION AND APPROVAL OF ALL E&S CONTROL MEASURES. 4. UPON APPROVAL OF E&S CONTROL MEASURES, BEGIN CLEARING AND GRADING OF THE SITE. BEGIN CONSTRUCTION OF STRUCTURES AS SHOWN ON THE SITE DEVELOPMENT PLAN. 5. MAINTAIN ALL E&S CONTROL MEASURES. STAGE 2 1. STABILIZE ROAD AND PAD SITES. 2. ALL PERIMETER STABILIZATION MEASURES SHALL REMAIN IN PLACE UNTIL THE SITE IS DEEMED STABILIZED BY THE PLAN REVIEWING AUTHORITY. 3. AFTER THE SITE IS STABILIZED, REMOVE SEDIMENT TRAPS. LOT 43 MAY NOT BE GRADED UNTIL ALL AREAS DRAINING TO SEDIMENT TRAP 3 ARE STABILIZED. 4. CONSTRUCTION OF THE ENGINEERED LEVEL SPREADER SHALL NOT COMMENCE UNTIL THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED AND PERIMETER E&S CONTROLS HAVE BEEN REMOVED AND CLEANED OUT. CONSTRUCTION MAINTENANCE THE FOLLOWING CONSTRUCTION MAINTENANCE PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. ALL E&S CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAIN EVENT. ALL DEFICIENCIES IDENTIFIED DURING THESE INSPECTIONS SHALL BE CORRECTED AS SOON AS PRACTICABLE. 2. THE SILT FENCE BARRIER SHALL BE REGULARLY CHECKED FOR UNDERMINING, DETERIORATION OR SIGNIFICANT EROSION. SEDIMENT SHALL BE REMOVED AFTER EACH STORM EVENT AND WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF THE HEIGHT OF THE CONTROL, 3. THE CONTRACTOR IS RESPONSIBLE FOR ADHERING TO ALL MAINTENANCE REQUIREMENTS SET FORTH IN THE CURRENT EDITION OF THE VIRGINIA 'SEDIMENT AND EROSION CONTROL MANUAL, OTHER APPLICABLE COMMONWEALTH OF VIRGINIA REGULATIONS AND THE PROJECT SPECIFICATIONS. 4. ALL SEEDED AREAS WILL BE REGULARLY CHECKED TO ENSURE THAT A GOOD STAND OF GRASS IS MAINTAINED. 5. AREAS WITH RIP -RAP SHOULD BE REGULARLY INSPECTED TO DETERMINE IF HIGH FLOWS HAVE DAMAGED THESE CONTROLS OR CAUSED EXCESSIVE SEDIMENT DEPOSITION. ALL AREAS SHALL BE MAINTAINED IN ACCORDANCE WITH THE REQUIREMENT'S OF THIS E&S CONTROL PLAN. ENVIRONMENTAL CONTROLS 1. CONTRACTOR SHALL PROVIDE AND MAINTAIN ALL ENVIRONMENTAL CONTROL MEASURES SO AS TO COMPLY WITH LOCAL ORDINANCES, STATE AND FEDERAL LAWS AND REGULATIONS APPLICABLE TO WATER POLLUTION IN WATERS OF THE STATE AND IN INTERSTATE WATERS. 2, CONTRACTOR SHALL MINIMIZE THE POTENTIAL FOR AIR POLLUTION BY THE USE OF EMISSION CONTROL EQUIPMENT ON CONTRACTOR OPERATED EQUIPMENT, SHUT -DOWN OF MOTORIZED EQUIPMENT WHEN NOT IN USE, AND ACTIVELY CONTROLLING DUST EMISSIONS THROUGHOUT THE PROJECT. MINIMUM STANDARDS (MS) All applicable Virginia Erosion and Sediment Control Regulations and Minimum Standards shall be adhered to during all phases of construction. These include, but are not limited to the following: 1. STABILIZATION OF DENUDED AREAS: Permanent or temporary soil stabilization shall be applied to bare areas within seven days after final grade is reached on any portion of the site. Temporary soil stabilization shall be applied within seven days to denuded areas that may not be at final grade, but will remain dormant or undisturbed for longer than 14 days. Permanent stabilization shall be applied at areas that are to be left dormant for more than 1 year. 2. STABILIZATION OF SOIL STOCKPILES: During construction of the project, soil stockpiles shall be stabilized or protected with sediment trapping measures. The applicant is responsible for temporary protection and permanent stabilization of all soil stockpiles on site as well as soil intentionally transported from the project site. 3. PERMANENT VEGETATIVE COVER A permanent vegetative cover shall be established on denuded areas not otherwise permanently stabilized. Permanent vegetation shall not be considered established until a ground cover is achieve that, in the opinion of the county Inspector, is uniform and mature enough to survive to inhibit erosion. 4. TIMING & STABILIZATION OF SILT TRAPPING MEASURES: Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to trap sediment shall be constructed as a first step in any land disturbing activity and shall be made functional before upslope land disturbance takes place. 5. STABILIZATION OF EARTHEN STRUCTURES: Stabilization measures shall be applied to earthen structures such as dams, dikes and diversions immediately after installation. 6. SEDIMENT TRAPS AND BASINS: A sediment basin shall control surface runoff from disturbed areas that is comprised of flow from drainage areas greater than or equal to three acres. The sediment basin shall be designed and constructed to accommodate the anticipated sediment loading for the land disturbing activity. The outfall device or system device shall take into account the total drainage area flowing through the disturbed area to be served by the basin. T CUT AND FILL SLOPES: Cut and fill slopes shall be designed and constructed in a manner that will minimize erosion. Slopes that are found to be eroding excessively within one year of permanent stabilization shall be provided with additional slope stabilizing measures until the problem is corrected. 8. CONCENTRATED RUN-OFF DOWN CUT OR FILL SLOPES: Concentrated runoff shall not flow down cut or fill slopes unless contained within an adequate temporary or permanent channel, flume, or slope drain structure. 9. WATER SEEPS FROM A SLOPE FACE: Whenever water seeps from a slope face, adequate drainage or other protection shall be provided. 10. STORM SEWER INLET PROTECTION: All storm sewer inlets that are made operable during construction shall be protected so that sediment -laden water cannot enter the conveyance system without first being filtered or otherwise treated to remove sediment. 11. STABILIZATION OF OUTLETS: Before newly constructed stormwater conveyance channels are made operational, adequate outlet protection and any required temporary or permanent channel lining shall be installed in both the conveyance channel and receiving channel. 12. WORK IN LIVE WATERCOURSES: When work in a live watercourse is performed, precautions shall be taken to minimize encroachment, control sediment transport and stabilize the work area to the greatest extent possible during construction. Nonerodible material shall be used for the construction of causeways and cofferdams. Earthen fill may be used for these structures if armored by nonerodible cover materials. 3. ANY WASTE DISCOVERED DURING THE PROJECT SHALL 13. CROSSING A LIVE WATERCOURSE. NOT BE MOVED WITH OUT PRIOR AUTHORIZATION OF THE When a live watercourse must be crossed by construction vehicles more OWNER AND BE DIRECT -LOADED INTO COVERED than twice in any six month period, a temporary stream crossing ROLL -OFF CONTAINERS FOR TEMPORARY STORAGE PRIOR constructed of nonerodible materials shall be provided. TO DISPOSAL IN A PERMITTED LANDFFILL. 14. APPLICABLE REGULATIONS: All applicable federal, state and local regulations pertaining to working in EROSION & SEDIMENT CONTROL PERMIT -TING or crossing live watercourses shall be met. CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL 15. STABILIZATION OF BED AND BANKS LOCAL AND STATE EROSION AND SEDIIMENT CONTROL The bed and banks of a watercourse shall be stabilized immediately after PERMITS AND MAINTAINING ALL EROSION AND SEDIMENT work in the watercourse is completed. CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. 16. UNDERGROUND UTILITIES: Underground utilities shall be installed in accordance with the following standards in addition to other criteria: a.No more than 500 linear feet of trench may be opened at one time. b.Excavated material shall be placed on the uphill side of trenches c. Effluent for dewatering operations shall be filtered or passed through approved sediment trapping device, or both, and discharged in a manner that does not adversely affect flowing streams or offsite property. d.Material used for backfilling trenches shall be properly compacted in order to minimize erosion and promote stabilization. e.Restabilization shall be accomplished in accordance with these regulations. f. Applicable safety regulations shall be complied with. 17. CONSTRUCTION ACCESS ROUTES: Where construction vehicle access routes intersect paved public roads, provisions shall be made to minimize the transport of sediment by vehicular tracking onto paved surfaces. Where sediment is transported on to a public road surface, the road shall be cleaned thoroughly at the end of each day. Sediment shall be removed by shoveling or sweeping and transported to a sediment control disposal area. Street washing shall be allowed only after sediment is removed in this manner. This provision shall apply to individual lots as well as to larger land disturbing activities. 18. TEMPORARY. E&S CONTROL MEASURE REMOVAL: All temporary erosion and sediment control measures shall be removed within 30 days after final site stabilization or after temporary measures are no longer needed, unless otherwise authorized by the local program authority. Trapped sediment and the disturbed soil areas resulting from the disposition of temporary measures shall be permanently stabilized to prevent further erosion and sediment. 19. ADEQUACY OF RECEIVING CHANNELS: Properties and waterways downstream from the development site shall be protected from sediment deposition, erosion and damage, due to increases in volume, velocity and peak flow rates of stormwater runoff for the stated frequency storm of 24-hour duration. JZT �". SHIMP Lk. No. 4 ==183 `o 110 5l o �� 1�s.S IO��X� _ NAL f / r LIMIT OF_DISTO�ANCE ;� �X X • • ®ILS • � X -___ - -- _ - - - - - - -� 7B - Braddock Loam - 2 to 7% Slopes N - f J __ __ __ __ - - •• - - 16 C hewaCla Silt Loam o0 0 - ,� _ - i i' r ,� -= -- __.- • _ __ - -- - '� `-- __. - X 'l ,- % s 37C3 Hayesville Clay Loam 7 to 15% Slopes Severely Eroded oeel- -..' 3 7 D 3 - H y sv I I I e Clay y Lo a m - 15 to 2 5 � Slopes a e a ORIGINAL GROUND ELEV. EL=A Area 2 (EXCAVATED) EL=C 1' Z 1.0' H FILTER CLOTH \ ORIGINAL GROUND ELEV. ** *SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP LENGTH (IN FEET) = 2' (I X DRAINAGE AREA (IN AC.) DIVERSION DIKE / zx ** COARSE AGGREGATE - / - �// EXCAVATED AREA FILTER CLOTH **COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) `.. s \ _ 2 �� _ ■ -, 628- (- f 1 STI - ST -1 PLAN DETAIL 1 "=20' Sediment Trap Design Data DRY STORAGE D2 A 67 CU. YD./ACRE EL=B Area 1 \ WET STORAGE 67 CU. YD./ACRE DA D1 (EXCAVATED) EL=C 1' Z 1.0' H FILTER CLOTH \ ORIGINAL GROUND ELEV. ** *SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP LENGTH (IN FEET) = 2' (I X DRAINAGE AREA (IN AC.) DIVERSION DIKE / zx ** COARSE AGGREGATE - / - �// EXCAVATED AREA FILTER CLOTH **COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) `.. s \ _ 2 �� _ ■ -, 628- (- f 1 STI - ST -1 PLAN DETAIL 1 "=20' Sediment Trap Design Data No. A B C H (ft.) Z (ft.) Weir Length DA Wet Vol. D1 Wet Vol. Dr D2 Dry Vol. SILT FENCE SF 3.07 INLET PROTECTION IP (ft.) (Acs.) (Req.) (ft.) Cy (Prov.) (Req) (ft.) Cy (Prov.) 1 628.0 626.0 623.0 3.0 4.0 13 2.15 144.1 3 154 144.1 2 147 2 632.0 630.0 627.0 3.0 3.0 5 0.77 51.6 3 53 51.6 2 63 3 622.0 620.0 617.0 3.0 4.0 14 2.35 157.5 3 166 157.5 2 157 TEMPORARY SEDIMENT TRAP ST C16 Not To Scale 40 0 40 80 120 Severely Eroded Scale: I"=40' �X ■34 ........... 30 27 n 5.0 .. J t ST -2 PLAN DETAIL 1 "=20' \ 4v ST -3 PLAN DETAIL 1 "=20' SOIL EROSION & SEDIMENT CONTROL SYMBOLS SYMBOL N0. TITLE KEY 3.02 CONSTRUCTION ENTRANCE CE 3.03 CONSTRUCTION ROAD STABILIZATION CRS CRS x x x -x -x 3.05 SILT FENCE SF 3.07 INLET PROTECTION IP 3.09 TEMPORARY DIVERSION DV 3.11 RIGHT-OF-WAY DIVERSION [DRAWN TO SCALE] 3.13 TEMPORARY SEDIMENT TRAP ST 3.18 OUTLET PROTECTION OP TS 3.31 TEMPORARY SEEDING TS PS 3.32 PERMANENT SEEDING PS M 3.35 MULCH MU DC 3.39 DUST CONTROL DC SOIL DIVIDE LIMITS OF DISTURBANCE DRAINAGE DIVIDE EXISTING CONTOUR PROPOSED CONTOUR � •- N r'7 d- Date 02/03/17 Scale 1 "= 40' 1 Sheet No. C16 OF 18 File No. CONSTRUCTION SEQUENCE NO CLEARING, GRADING, OR HEAVY EQUIPMENT ACCESS IS ALLOWED EXCEPT TEMPORARY DISTURBANCES ASSOCIATED WITH INCIDENTAL UTILITY CONSTRUCTION, RESTORATION OPERATIONS, OR MANAGEMENT OF NUISANCE VEGETATION. SOME LIGHT GRADING MAY BE NEEDED AT THE FILTER STRIP BOUNDARY; THIS SHOULD BE DONE WITH SMALL TRACKED VEHICLES TO PREVENT COMPACTION. STORMWATER SHOULD NOT BE DIVERTED INTO THE CONSERVED OPEN SPACE UNTIL THE LEVEL SPREADER IS INSTALLED AND STABILIZED. EROSION CONTROL MEASURES FOR LEVEL SPREADER INSTALLATION Scale: 1 "=20' Vnnm LL1 cc TYPICAL GRAVEL STRUCTURE 2 RIGHT—OF—WAY DIVERSION (RWD C 1 $ Not To Scale PIPE OUTLET CONDI TIONS A A PIPE OUTLET TO FLAT AREA WITH NO DEFINED CHANNEL r-- 9' 0 % baa SECTION A—A FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION BASKET, OR CONCRETE. 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED USING PLATES 3.18-3 AND 3.18-4. 3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT LESS THAN 6 INCHES. ,/2�OUTLET PROTECTION (OP) �, C1$ % Not To Scale 10% SETTLEMENT 0.3' FREE BOARD T-- — DESIGN FLOW DEPTH TYPICAL VEE—SHAPED DIVERSION TEMPORARY DIVERSION DV C1 g Not To Scale 1J TT T QT nDV 2' r4 -` FILL DIVERSION FD C 1$ Not To Scale GRAVEL CURB INLET SEDIMENT T FIL TER RUNOFF WATER GRAVEL FILTER * I�12" A nil Ir"ilk ( I o 0 — � d SEDIMENT CONCRETE GUTTER 12" SPECIFIC APPLICATION WIRE MESH [FILTERED WATER i ilFTt- CURB INLET IF THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB IMLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY 'TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. !v,I,N-* I TH ! (J' f I -' dll - ;�F € I .-IAF PLAN �...... ... .. .... -- - - 1 - ` V IN - -.._ _ _._. ._............ SECTION — -AL 111ini1iium wiltel till) of I illdi llltt,A be ili4:Illeed 'witli it milllinlluw I indi b lllc tznk rIltl#+}ff ti i11�°e t11�1�i ri, .l h li g icitil a �diametel° {if I.5 indies for adequate i onstan( l?rew me. Va41i vv -Iter must 61e C"Imecl my")y f,0111 the ellWalice to an tlTirl'i�� etl 4ettlill*' areal f0 reliicl� e Siff lIt 11 . X11 e iiliielit li7ll be prevented fr r1II elil:elill�= S(oull I.li"Iiuis, ditches or �, atercollr4es, PAVED WASH PACK PAVED CONSTRUCTION ENTRANCE s WITH WASH RACK CE C1$ Not To Scale CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6' MAX. FLOW r C- 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. �C- FLOW SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) FLOW I �' POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) 1KI-T1j. Q-) JUST M. SHIMP LIc. No. J45183 16ISsIONAL E Cn � U) co EE=c 0 U U o _ �lCn V) I„ � uu ��1 0 0 0 0 o C C � � o 0 ® o 0 o n C1 cl� 01 CD 00 CD r\ A N N N N �Lnm O _2_2 C -0N D o Scale * GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. N/A 5 INLET PROTECTION(IP) She Silt Fence Without Wire Su ort SF c 18 of 18 C1$ FOR USE Wrffl DI -3s, Not To Scale C1$ Not To Scale File No. 15,006 v I5 T iR U1,y 1.)i r , L Rx �. PROFILE A F !v,I,N-* I TH ! (J' f I -' dll - ;�F € I .-IAF PLAN �...... ... .. .... -- - - 1 - ` V IN - -.._ _ _._. ._............ SECTION — -AL 111ini1iium wiltel till) of I illdi llltt,A be ili4:Illeed 'witli it milllinlluw I indi b lllc tznk rIltl#+}ff ti i11�°e t11�1�i ri, .l h li g icitil a �diametel° {if I.5 indies for adequate i onstan( l?rew me. Va41i vv -Iter must 61e C"Imecl my")y f,0111 the ellWalice to an tlTirl'i�� etl 4ettlill*' areal f0 reliicl� e Siff lIt 11 . X11 e iiliielit li7ll be prevented fr r1II elil:elill�= S(oull I.li"Iiuis, ditches or �, atercollr4es, PAVED WASH PACK PAVED CONSTRUCTION ENTRANCE s WITH WASH RACK CE C1$ Not To Scale CONSTRUCTION OF A SILT FENCE (WITHOUT WIRE SUPPORT) 1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH UPSLOPE ALONG THE LINE OF STAKES. 6' MAX. FLOW r C- 3. STAPLE FILTER MATERIAL TO STAKES AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. �C- FLOW SHEET FLOW INSTALLATION (PERSPECTIVE VIEW) FLOW I �' POINTS A SHOULD BE HIGHER THAN POINT B. DRAINAGEWAY INSTALLATION (FRONT ELEVATION) 1KI-T1j. Q-) JUST M. SHIMP LIc. No. J45183 16ISsIONAL E Cn � U) co EE=c 0 U U o _ �lCn V) I„ � uu ��1 0 0 0 0 o C C � � o 0 ® o 0 o n C1 cl� 01 CD 00 CD r\ A N N N N �Lnm O _2_2 C -0N D o Scale * GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. N/A 5 INLET PROTECTION(IP) She Silt Fence Without Wire Su ort SF c 18 of 18 C1$ FOR USE Wrffl DI -3s, Not To Scale C1$ Not To Scale File No. 15,006 I*Outlet WSE is listed as the greater of either the calculated tailwater or the invert out. ] .................. I - 111,1 11,111,111,11, .... I I I 11 11 "I'll - 11111111,11 - I'll, I 11 -,'"'I'll" I � I I I I 100 0 --- - --- 100 200 -300 E E ALM" AFAILAL]IIK-1111111- - Scale: 1"=100' " I � � . � li, \ i , " � \111� \ I r � / I - � \ \' I 1, '. I 1-1 I / I � � - 11. , � 1 1 1 1 I , , , _�, I I I I �' A \ � - I _,.��- I - , , / ; I i � � I 1� ,_i� \ J , / I 1, i , 1, . � I I 1 i */_''\� , � , , . � ,__n , I I , , � ., \ IJ/kk I I I � , i / 11 / / , 11" k , I ( � I , � / I � -, �_,,- -,I 'k, , � 1 � � - -1 � i � I !" "., / , ,_..�.� " 1 -1 i 'I : 1 \, I / . " I il , 11 ; l ,,,,� �t I � � i% I __ , . � . I � , , , �, '! r, �, " i, r-1 � I i , 1 " � �, - �11 ,l� 'r�/-,�,� " I , � ,i�� . / i n; ��, C . � I : . 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Ii25 0 O.51; ;; j�� 999 --.-.- B5 DI -3C 3 0.62 0.56 0.35 4.0 1.401 0.01 1.415 0,016 0.020 0.020 0.083 : OP5�04 "Ik7 il, f� o$ E5 616.00 616.00� .25 1.25 0.23 0.5 0.47 5.44 4. 450I�:I 2111' 13.;131'11;l82� __...: 0.; 6 952 6.361 36'--1 - ; 9 . 9 � 75 9 ��jS:::: :::::: , : :: 1 : � ;i : : 6 :: ::: �: 2.626 i i ::::: i i L9 � 99 :9:9 ii I : :::: I �� j- L L 9 : 1: , � El � :0: 0 1:� 9',", � � :i: ; � % i : I � 9 . ....... 2' 1 Q 91 i1i : 919 9 1,i , I : ?" l: � ��04 � I 9 � �:::::: �: :: , 9, 9 �: 0: ::: ::::::::::: , " : : : 9,9 ::: , ,9, 9 9 " :�:�:: LL , : ::: IL FL: � � � � �: �:::: �:::::::: ::: : :::::::::: �ii i i iiiiiiXt;i;i:X:i � j�jlllli:: 9 9 99 :�::::�:::: : i � i 9 ; ; 1 �ii:;: : �:ii � ��:� � � i xx *�::�:;:: : :::::::::::::: �::::: i: i ��: A � � : :i: : I : : : ;::: ::::::: : 9:. lX� ; .. : : : :X:�� ::: � �: xxxil : � �� : l:: ��::::::::::::::::::: �i 9 9 9 9 : i: :::�: ::::::: � i � 9 : 99 :::::::::: : : � ::::::::::::::::: 9 99i9 ;:,:::�::��:�::::::::::�� :�::�: � �:: � : : iL 9 9: � i r I � l:: :X : ,9,9, t�1�19�9:99 Li :: xxli:�� : �� : :j:�:�: :::::::::::::::::::: � i i �i i i � : : � X�:�: ::I: : : ,, ,%�:::: � � � � �:::: ::::::::::::: :::: : : , : � � �: xxxxiXii: �:: � 9 9, �:: ::: : : : i i::: , , '91 ; 99 : ... i ' L � � ��:� L. �� :::::::::: �:� : :::i!�:�o �:: 9�9 9 � : : : I 9i 0:� � �� :�: : : : : : 59 ::::::::::: , :::::::::::::: :: - , itxxxx � 0 : � � � i i " % X:� i , �:::::W, b L jj L. ,Q - :',:,% bb i 9 -,9 9 i. l i -i �: ::;�q , . L L, , ,� % LL, 5�� . . L�: l:lllll�9 9. 7 �:9 L,b , � lY i , Z81..W.99i'.; : � �i � i� : B4 DI -3C 8 0.75 - 0.70 . 0.53 4 '0 2.100 0.02 2A15 - 0.016 0.020 0.020 0.083 . �8 J 'I 11-17i'l 26P " �40�Ji3:i 0 oV, : $ � �4 6646 :0; 0.26 0.5 0.52 6.69 91100.5073% . . :::::i�:::::�::�:::: : ::: �� Y:Y��;�:: : � :�j�i�j: ; 1i; : �� i � � �� l �� l� .1 q: i k_:,1111 i; i :::i : :ii 99 : : : � � �:: � 9 L"'�;;:�:�:::::::::::::::::: I llll� : ; ; � : : � 7�§:: iiiiiii:: �ll: !��q : : i �% �91?9 �99 9999999 P:: ; P ix: :::::l: ::::: i : : i ; :�:�:�:�:�::�t:� :: i 1 i: 0: 0g: l::: � :::::�:::: i� " : llli��:i: 919 li�:: �:ili:X3�1 . , : 9 � 3 % ::::: : i::: i i 1: ilill: :::: ::�:::i: iiiii: : � ::i ;::::: � i i lil:�ii: : : : ::: � L� :�: , � l%99 _ ::: : �;�::il ii� �: ,: � l, 9� lillillill]:: �:::: �:�Xiii:ii:X:::: ; Y �:�:::: :::::: :::::::::::::::: �� : : : : : : 1 : : : li:ii: :�:� : . ::::::::: 9 :: : , �: i �i 9 9 9 : i i!:. ;;;;; iiiiii: � 49 I � 9 :l:�:�:::: iii liilli:iiil�i i; i i li: llli ��i :L :l: ..L"; �:: �:� � � �:�: :l�illi:li::: ::::: � �� ::�:�::;: i�::::llllX,::,: : ll-- � 9 9 9 9 ::: : ;99 : 9 : :::: ::;;;: : :: � : I 11:lllllill::� :�:� : 9 :1 ::::::::::::::::::::::�::::::;::;:::;:::: � i L �� ::��::::::::::::::::::::::::::: :::::::::::::::: ::::::::::::::::::::: ;�Lllii: : llllliil�:�:: : :�:�:�:�:�:::::::::::::::::::::�::�::::::: :: : ::::::: � : : I I I : I : iii: : I:: ::::: 9 9 i � i 0 3 �:�::::��:: I I , ",,,,,, % . .... 5. ;;:;:;;;;;i;,;: I . :: lllllill�; i :: L r � , ,%,%,, 6 .... qy"," , : : �;�; � ll: ::�:: :: y4i: X�: I.:9: 9 %y.,9:l9: L. 0,2 i: i: li:,iL�::��.'%: 3: , I*Outlet WSE is listed as the greater of either the calculated tailwater or the invert out. ] .................. 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LSPIR 50 SF +19521 , I , D i 11 = , � - , ! \ "� � I � -R D = 141,460 SF , , z , -, f� I` �i�i__ .11 , � UPI.. . j� i , - �.�� i I !" r! . .,e_�: "."// I 143183ilMP. +1_390 . --FROq cD '11ii ,ill li, , .41*,- . ! -, __ I , 1 i! " __ ___j � , __ _ 19 4MIP I . 1 ",--t), 1 "l,", i -- ----- � _ - _- - _-_� --- --- ;J 15 - � ," � I __ � � _,_ -_ . I i , I , , f - :.-.� -SPREAPER 0 = 275?22 IMP ' � " , _, � - - � 7 __,_1__ -- _-, I " , . , --.-- __S__..__ . _- "--. U � 4 1-_--[------� I I 1�1_; 41_ " --- . -,J " _ I - -, . " "'! 1__i _ ,, I I ` -, -,, - j __ _1 ___ I W I , ��- � , . �, j , ��', . � l,ft , . " I - I / , i I , , , ,_�Ui,_. I , lo 1.11, - -F. --7--' 1 I - - - I ,� " , 11-1 � "I, - _-, C'� f�k, �,j 4! � H" ______ I 1 2pu •. . !� I -1 ) --- ir 1- n � ,P i I , .11 �_P; ---- - -- � ____ � 11 , , f In 1 - , � i "If I I ') � 5 &la ') "A -1 -, � � � � , I , , - 1, . FT_,�;`;] ]'I _1_,_" ------- � ICC3 1k - - 11 - , , I - I I- I i , , � - , 11 .. , , I'll 19 1 11 � lir � , 1, -11 I , I 0--a I o • ;%, . I , I I ,� ,____ I .,� --- . I f 4 . . 3 I I , ..... I " �'/, � i i :: . , I'll - � - W r - - I- --- , , '� l � 4 I/ ,� I �, 1 .'i i � _ . "I'll � , 11 ii, I � I �- - , - � � �, _�_ --.-. � . � , I , . , I/ 11. �� I " , " - I - .- __ I I ,. - I , /� ,, ,,, , � � --- - .." - I I / ,� __ - -_ � - .- I CHESTERFIELD . LANDING I 2 STORM I L DRAINAGE MAP L Up . ; Pipe I Pipe 0.44E5 Pipe Velocity Flow time Point l 0.50 :.j�,,ii�� A Coef .. . AC ME= I TC 11 . Int Flow � Inv I Inv Len S -.1.1- I., Dim I I.. Cap Junction Loss .1-11 Inc W.57§ , iB 0113 (ac) 42.1i � 01�1 i : 8,703 1 I (min) (Whr) Outlet - El El (ft) % (in) ®- (cfs) (ft/s) (min) - 1 2 1 3 1 4 5 1 6 1 7 1 8 1 9 1 10 I 11 Inlet 13 1 14 Water 15 . 16 i 17 ��.-.,., : :::::: ,i ::: , ::::::::::: 11111� 11 : ��ili:� ...... Mi [ �:� : : 19��; 4��:::::il �� ,::: 2 ::::X�� [XX ,�: - �� : � P:�7 ��:Xff::::::��;V�;� � , � I �iN: i:: xxx4fil; ii,� X� i , ,f :::::: I-,""" I , �..... ...... i: ::: :: I ��::: oo : � � 1, �:: : : ; k ; : 1: �� :: :: 0 t 1: � : :::: I::::::: 1.10 Ti,�i :::: � '111 � i: : -8 :0 � 00:11 �i 4 : ��l: [::�49.-,.,T 21:1::g%io� � : i! t 'I', I'll, I , i I'll, "i'l I I I ; ;l : �.�: 0%:::ij:i i ;: ::: :: i ::�;xj::::::: ::: 5i : lll::::� �: Al � " ::::: " : : �i��i�� 7� V��li : ....... I 1 1 4: gil�: � �::::� : ::ll:: .. :�.�� , ,,: Water D3 Inlet Surface 1 O�71 0.14 1 0.31 1 5.11 1 6.78 1 2.11 1 645.50 1 644,50 1 106.49 1 0,94% 1 15 1 7.4 1 5.3 1 0.34 Surface Elev.* Do Q0 Lo Sf"% Hf V0 Ho Qj Vi QjVi Hi Angle H,�, Ht 1.3*Ht 0. 5H t Final H Elev. Rim. Elev 1 2.:..�::. 3,.,1i".�, 4, 5, 6.... 7 )- (:� 1 (-I1i) (12..-..:.:) ) ( 1",, 4) (1 (1 16111),1 (;_ (,1;8)� 1.119- 2_0 : �4��obi 1�Z§ 0 ,;,j 1: 3§�9 � ..,. ., Uow �9 7 I ftR i1ie 2- i1 � -2 .. I�1 -T4q' MEMEMINEM l:(1 Z fl�%f4 . �� ONOT 2q 1 64D�g .. 4�L .) ; � l 7 �i - D3 645.50 1.25 2.11 106.49 0.1072% 0.1141 5.252 0.1071 1.148 4.561 5.2 0.1131 6 0.0194 0.2395 0.3114 0.1557 0.270 645.77 652.10 D ip�7Y j.2 1 As 2 owPP I� :X0� .lI:8L 75 1 - ,N(�9) A. :0) : :(: i :3X: ,II L ;1I]�5) 1 )0q§ :.1. .�7.:)� 0I.5 o �5 ...L : 646" 6 M.iIx .. ,iT0..1042./0 .-:....21 I.,, .. %. m�mYEEMNEMEIM=Ee= Emm 11=�Emm L ME= M =1101IMM111111111111111111111001S. : M 10 � o I, $W X$ *2j8010 -� f1� 20 92� ; : 0*04 �M �:., $ '.;.....- : t�i � T � . :i l% 1"�_�L E3 588 70 .5 8.20 08=MIMEE=EMMNE=m�EMMNE=NEMEEMEEMEEMM 4. . . 1. . . 15.3 . . .0 1.72 2.3043 1.152 . 590.53 604.85 ,,� 4 Pyj.W ........ Ii25 0 O.51; ;; j�� I.4 l3 l , � 0. 0 8i ; L 8 ,J'2 41.7 1 , % O p�I09: 0 IZ '33 I:i�Ilx: l,"lLi"il .lZ 2It : �P6 ; ".i-594.99'iI L: i16o : OP5�04 "Ik7 il, f� o$ E5 616.00 616.00� .25 1.25 266.60 1.6692% 4. 450I�:I 2111' 13.;131'11;l82� __...: 0.; 6 952 6.361 36'--1 .277 9.277 57i�i: 9ii.07 .,4677 0x 22 0.i341i1�;':Lt7I� 5: .I 5I 1 04, 1, 1.9635 .9635 0.198%�.,,% .432 5.432 - 621.43 21.43 3 9 634.09 4:� .' :tgb„:: .........i.q.. 1�$ 06 ..ii....,..8_.34.", 29.oo:i�, 0 V� �l4 "F0; V 7 05�4t I i.6YU J%OI8 ., $; I�7$ �$ o� V 0l: 4� Ioot . �8 J 'I 11-17i'l 26P " �40�Ji3:i 0 oV, : $ � �4 6646 :0; 631.35 1.25 I... 4.6 91100.5073% 0.4723 15.978 0.9911 4.657 6.748 31.4 0.2475 25 O�2121 1.4 507 1.923 633.7 644�24E7 � 11 I g g 4l66:go1040-9 k p 0.1200o�%0 : jZ ; & 48 0476 i..1.. 2�8 7�;? 3 �8�2:� i . 2861 65 b�4�5 � 0��R : M00Fw " F f��j041 l: X% A5 647.4 i�: l 7 I E9 641.70 1 1.25 1 2.51 , 29.07 0.1507% . 0.0438 1 7.243 1 0.2037 1 ----I 1 I - I I I 1 0.2037 1 0.2647 1 0.1324 0.176 f 641,88 1 647.A I1 I*Outlet WSE is listed as the greater of either the calculated tailwater or the invert out. ] .................. 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LSPIR 50 SF +19521 , I , D i 11 = , � - , ! \ "� � I � -R D = 141,460 SF , , z , -, f� I` �i�i__ .11 , � UPI.. . j� i , - �.�� i I !" r! . .,e_�: "."// I 143183ilMP. +1_390 . --FROq cD '11ii ,ill li, , .41*,- . ! -, __ I , 1 i! " __ ___j � , __ _ 19 4MIP I . 1 ",--t), 1 "l,", i -- ----- � _ - _- - _-_� --- --- ;J 15 - � ," � I __ � � _,_ -_ . I i , I , , f - :.-.� -SPREAPER 0 = 275?22 IMP ' � " , _, � - - � 7 __,_1__ -- _-, I " , . , --.-- __S__..__ . _- "--. U � 4 1-_--[------� I I 1�1_; 41_ " --- . -,J " _ I - -, . " "'! 1__i _ ,, I I ` -, -,, - j __ _1 ___ I W I , ��- � , . �, j , ��', . � l,ft , . " I - I / , i I , , , ,_�Ui,_. I , lo 1.11, - -F. --7--' 1 I - - - I ,� " , 11-1 � "I, - _-, C'� f�k, �,j 4! � H" ______ I 1 2pu •. . !� I -1 ) --- ir 1- n � ,P i I , .11 �_P; ---- - -- � ____ � 11 , , f In 1 - , � i "If I I ') � 5 &la ') "A -1 -, � � � � , I , , - 1, . FT_,�;`;] ]'I _1_,_" ------- � ICC3 1k - - 11 - , , I - I I- I i , , � - , 11 .. , , I'll 19 1 11 � lir � , 1, -11 I , I 0--a I o • ;%, . I , I I ,� ,____ I .,� --- . I f 4 . . 3 I I , ..... I " �'/, � i i :: . , I'll - � - W r - - I- --- , , '� l � 4 I/ ,� I �, 1 .'i i � _ . "I'll � , 11 ii, I � I �- - , - � � �, _�_ --.-. � . � , I , . , I/ 11. �� I " , " - I - .- __ I I ,. - I , /� ,, ,,, , � � --- - .." - I I / ,� __ - -_ � - .- I CHESTERFIELD . LANDING I PHASE 2 STORM STRUCTURE DRAINAGE MAP - i;, I (V , i, ��71Z_____ � , Y, J11 I I �-L-,. i ", I Y , , , , . -, I � - - ,� , L , - 'I " --.',�- k � , � � ,7 , _� ill k�5 - . " ., \ � _q�_7 � . - . 1\ I 11 , � "N --d. i'�!,I I I il; i . " 1 , I . i I ,; i�/ !it , I I t 1, , �� , 1 � �! i,`,� ; 1 1 , I I : ,/I , , f , "'i 1 - I 1i Ji, I t . \ . ; , I i oil i'j"jij, 1 . � , � I I , e . I i I i i t - li I -- , ij! I ! l'i " . � 1, I i i, "', j ; I _�,f ,,,,., ,/ � , i , i \i � i . I, � I _ ,/, pi" � I � . .-' d � I : � I � I � i i!l I \� , iii, I I i I I i i"11I . , i I I '- I 1111,1i 71 1 � t i I i; I i 1! I � \ I �. \, I I� . ( I , ;I ! I 11 � k I I j i, �; i � it : - j I I L 1! !10 H I � I . 11 . � a k , - )i �!j I , , . I � - 4�'_ ';7 I. I . .1 I . , : . 1�1 . . � . I 0 , I I i - I , , _ r " � I i il � I . � c 1� '- ! Mj j I I I / \�,, 11 1 I I I . I � . � ; J I 111i, f, , , i , I I i " T'l UH i � I i ! I I I � . I i I I . 1. I � I ! N, I ,!it , _j "t � � j I ; I I -7- 7"T'i . � , - � � I I I I i, '''! 1 : . I � "i T I jl.�! I I , i 1-I'll' 1� ,ij'�.. 1, 1 i 1, / 1. .k " I— . I i'�i,--7r,,- ic�_ I i i . � � . �Ift"I_f 2� � 4 f 16-1� 1 , I , i , I I � \ , , � .� I � " 1; ; �iil! I i I i : /. ., , I I , , I , � i � , - !� : "\ I , I I H M I , i , , , 40 il, i --. 4, , 1,, , , lili I , ! I I I i � � I I I 1,� I j�l I : ,I 1, , Ili! . I I , , \ _11,121, j, ! H I �!� - I 1/ I I � . �_,�'I�i - I I 11 � , - .1 I � ; h, i � ' !� I � , l � B1 ( . . f -, I ! / , i I -.1 . i I , � . . /I ', 3 ',; � i 1 k � I I 'S, , 1 1 �1' , ,t$ f I lsi,6_� 8i � t P. � , i I I " 11� I \ � ,\'t L__ I � 1-1 ---. L , . \ \ ', 1 , � I , I , % � ! , , , I � % i, " L i )j� I . 4 . . . ---_j I , i , , /,/ , , ,, � ., 1, . . I /`//�"//"//`,�/,-�-,��, '�,,, . � i I � z i / , � ", 5, , i . "I � I , , L I C3 ", ; I -!____ 1 . !I \ _1`__- \ I � I '�' � L, ` `_.�, I i � ,. -1 11, �� k_+[Ittit�[Ilt:'IIU LdIfU111 From To Point Catch Runoff Inc Accum Tot Tot Tot Up Dn Pipe Inv Pipe 0.44E5 Pipe Velocity Flow time Point l 0.50 :.j�,,ii�� A Coef .. . AC ME= I TC 11 . Int Flow � Inv I Inv Len S -.1.1- I., Dim I I.. Cap .111-1111 I .1-11 Inc W.57§ , iB 0113 (ac) 42.1i � 01�1 i : 8,703 1 I (min) (Whr) (cfs) - El El (ft) % (in) ®- (cfs) (ft/s) (min) - 1 2 1 3 1 4 5 1 6 1 7 1 8 1 9 1 10 I 11 . 12 1 13 1 14 1 15 . 16 i 17 ��.-.,., : :::::: ,i ::: , ::::::::::: 11111� 11 : ��ili:� ...... Mi [ �:� : : 19��; 4��:::::il �� ,::: 2 ::::X�� [XX ,�: - �� : � P:�7 ��:Xff::::::��;V�;� � , � I �iN: i:: xxx4fil; ii,� X� i , ,f :::::: I-,""" I , �..... ...... i: ::: :: I ��::: oo : � � 1, �:: : : ; k ; : 1: �� :: :: 0 t 1: � : :::: I::::::: 1.10 Ti,�i :::: � '111 � i: : -8 :0 � 00:11 �i 4 : ��l: [::�49.-,.,T 21:1::g%io� � : i! t 'I', I'll, I , i I'll, "i'l I I I ; ;l : �.�: 0%:::ij:i i ;: ::: :: i ::�;xj::::::: ::: 5i : lll::::� �: Al � " ::::: " : : �i��i�� 7� V��li : ....... I 1 1 4: gil�: � �::::� : ::ll:: .. :�.�� , ,,: : �I 9 1, D3 D2 1 0.20 1 O�71 0.14 1 0.31 1 5.11 1 6.78 1 2.11 1 645.50 1 644,50 1 106.49 1 0,94% 1 15 1 7.4 1 5.3 1 0.34 DA Area Impervious C A ED � ?: V 7I'II1,- 3"1,� 1. 6:9"!:,:";;�::"_,;":_:";:':�,_ 0::'_::�:,;4.",�;� 9.65 ": 0;41 17 1921 8 12138 , 0.68 0.44E5 E8 ! 24,551 ; 15,833: � 0.69 1l0.55 l 0.50 :.j�,,ii�� E9 1 24,117 � 14, 672 ME= 12.71 I 8,i 3 =001=00110=111111111 0 so 31 MIAMI 7,053 I a � 0.25 I1 W.57§ , iB 0113 0 06 ! 42.1i � 01�1 i : 8,703 1 I . , 4 1. .. 11 0.68 1 ..... 1. - 0.20 i i : iiili;: B9��;,I�::::::��:;:;: 1;��Pil,;;: is 1=1 1=��=I :,;�::,Fl�i�:��F�_ i li:� I - - �:� ill I :111 �� :: 830 ;;�;;l1;11�::::;:::4 I .... . "" "i "I'll, : i i l iiii; �: ::�iiX � I 0 43!��: �::iil�::I: :::::::::: i":" ;::::: �:1 : i: �il: �:��:��O:�P,�::��, I ;: i 0 ; ®- � 1. 1. 147,464 ,, 27,222 iS i 0.41 'II No= :.iB.l.i.l.li : 011111IMMEM Y8� i: 36 :0 EMMIMMMINAHMEMMI11IM11=11111MINMEM I I 9,966 i .40 j 1 43B6 1 85 I l::ll:ll0 i: : Ai:�,i: V. lt1,_lll;"111 ii:,IiIr� : 1r:. l:56 i: �i 01:1�,11,,1;6 : 20 �WI�MI�MI�Ml 32,597 21,819 ' 0.70 1 0.7:5 - _.- IMMI � ��s 1; � upMmumm-um-m=mmmommmomomisom IMMIINIIIIIIIIIIIIIIIIIIIIM �=�=l - ENMEMMINEMEEMEMMIENMIMMIN� Emm 00=0101=011=111MIRMEEM MEMEMINEM MEAMIMEMEEMEEM ME NNEUMM, IMMI��IMMI 0 * _____�MIIMMIIMMI�Wl�=I��I=��MIIMMI�i� 01=101=11IIIIIIIIIIIIIIIIIHM 99 1IIIIIIIIIIIIIIIIEMEEMEMMEEMEMMEMISIM MEMMEM None0IIIIIIIIIIIIIIII • IMMIIM��MIIM��=I • M IMMIIMMII=�I=�IMMIIMMIIM�� m�mYEEMNEMEIM=Ee= Emm 11=�Emm ME= M =1101IMM111111111111111111111001S. M, * I, =ml® =�Ml wl=�=I�Mlm ��=I�Ml �Wl�� 01 11111111111=1=11IIIIIIIMI�Ml 08=MIMEE=EMMNE=m�EMMNE=NEMEEMEEMEEMM DA Area Impervious C A ED � ?: V 7I'II1,- 3"1,� 1. 6:9"!:,:";;�::"_,;":_:";:':�,_ 0::'_::�:,;4.",�;� 9.65 ": 0;41 17 1921 8 12138 , 0.68 0.44E5 E8 ! 24,551 ; 15,833: � 0.69 1l0.55 l 0.50 :.j�,,ii�� E9 1 24,117 � 14, 672 U.b/ 12.71 3 8,i 3 5, :986 0 31 I 6�� 6 31 I 10,367 1 7,053 I...I 0.71 I_0.24D4 0.25 I1 W.57§ , iB 0113 0 06 ! 42.1i � 1310 i : 8,703 1 I . 5,512 � � � l � � 1 , 4 1. .. 11 0.68 1 ..... 1. - 0.20 i i : iiili;: B9��;,I�::::::��:;:;: 1;��Pil,;;: I fl 1-1 ii; 3 915-4.. 1 "'';1 :�'��::: il: i; i I ]:; I ,�'. I 4 ;�:Vlllill;I,i . I 11 :,;�::,Fl�i�:��F�_ i li:� I - - �:� ill I :111 �� :: 830 ;;�;;l1;11�::::;:::4 I .... . "" "i "I'll, : i i l iiii; �: ::�iiX � I 0 43!��: �::iil�::I: :::::::::: i":" ;::::: �:1 : i: �il: �:��:��O:�P,�::��, I ;: i 0 ; 8� � 1. 1. 147,464 ,, 27,222 iS i 0.41 'II 39 3��'1ll1l1l:,.�:: :.iB.l.i.l.li : 1"58,498 Y8� i: 36 :0 1.34 , : 62, 281 9,966 i .40 j 1 43B6 1 85 , 1,127 1', " - § _ 1!�:*: 1i l::ll:ll0 i: : Ai:�,i: V. lt1,_lll;"111 ii:,IiIr� : 1r:. l:56 i: �i 01:1�,11,,1;6 : 20 B4 32,597 21,819 ' 0.70 1 0.7:5 - . I , � . I � I I I I . I : � IMPERVIOUS 1 1 , . BMP DRAINAGE DIVIDE _,l;,., iiF � STRUCTURE DRAINAGE DIVIDE - i 1 - 1 1 - - � � I � . , ;,� 1, _ I I � � , , 1, 11',R '`. of Concentration is 5.0 minutes unless I\ otherwise indicated. AQ'Oro�ximations of future houses are shown. Outfall Impervious Forebay (SO (sf) Accum. AC Length (ft) 12 (in/hr) Q2 Velocity (in/hr) Flow Depth El 53,112 106 1.32 17 5.17 6.83 0.31 0.26 Forebay = 0.002 x Impervious VRRM TV=4745 cf I I .... 1-111 ... 111.1 11 1.11,11,11, ......... - 11 1. I .... . 1.1.11-1-1 ... _ I I .1111.1.....; Length = 13 x AC x 1 in/hr = Weir Width Channel Slope = 0.02 per ELS spec Q = C, - L * H3/2 I Mannings "n" = 0.07 for dense grass I I I I I .1 � I . I - Updated Level Spreader B: 8.04 AC Treated ow ep i compute w weir rmu a, Q ven n e , Outfall Impervious (sf) Forebay (so Accurn. AC Length (ft) 12 (in/hr) Q2 Velocity (in/hr) Flow Depth R1 89,124 178 364 47 332 1210 1 1.13 0.23 � V RRM TV= 1 1690 cf � I � 111�.111111.111.11111. .111.111.�.,��Ill""I'll".'ll'I -.1- 111.�.1.11111_11111111 .... _. � , 1.1.11 � ..r; , . I ;�preadersfrom Phase I M. 15.11) AAI I rea a C: 4.6 I AG rreafea Impervious Forebay Accum. Length 12 Velocity Flow Outfall (so (sf) AC (ft) (in/hr) Q2 (in/hr) Depth Bi 80,604 161 3.73 48 141 12.71 1.13 0.23 ' C1 71,602 143 2.39 31 5.00 11-94 1.17 0.25 I S DrPader B TV= 1 1375 cf I I I Spreader C TV=7855 cf : Phase 1 Spreader B was designed for excess capacity than the Phase 2 Conditions , ,will generate- Spreader B is adequate for the updated land use. , I Chesterfield Landing Pliase 2 1 1 153 ft overland flow 10.5111�6. slope 0.35 C -value 11.0 min Seelye Ch,art. 28 ft paved swale 13 ft height 0.1 min. Kirpich! Chart 11.1 min. 193 ft overland flow 11.791,16 slope 132 ft paved swale 0.35 C-valLle 11.8 m1n Seelye Chart 3.7 ft height 0.2 min. KirpichChart 12.0 min. 200 ft overland flow 16.0% slope 035 C-Val' Ue 11.4 min Seelye Chart 81 ft s. c. flow -field 3.7% slope 1_4 fps velocity 1.0 min. NEH Figure 15-4 77 ft swale 1.5 ft height 0.7 min. Kirpiclii Chart 131 min. 200 ft, overland flow 15.5% sl,bpe 0.35 ane -vol ue 11.5 min Seelye Chart 36 ft s. c. flow-field85.3% slope 2- 0 fpsve loc [,,ty 0.3 min. NEH Figure 15-4 130 ft. swale 3.5 ft height - 1.3 min. Kirpidti, Chart 13A mill. 200 ft. overland flow 338 ft swale 5.5936 slope 0.35 C -valve 13.6 min Seelye Chart 22 ft height 2.0 min. Kirpich Chart 15.6 min.