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WPO201300018 Plan - Approved 2013-03-05
a 6 OWNER: 032GO- 00- 00 -000A0 STRAW BAIL BARRIER WOODBRIAR ASSOCIATES DD PO BOX 5548 TEMPORARY DIVERSION DIKE CHARLOTTESVILLE, VA 22905 APPLICANT: WOODBRIAR ASSOCIATES TEMPORARY SEDIMENT TRAP PO BOX 5548 SB CHARLOTTESVILLE, VA 22905 ENGINEER: COLLINS ENGINEERING IP 200 GARRETT ST. SUITE K, INLET PROTECTION CHARLOTTESVILLE, VA 22902 SF TELEPHONE: (434)293 -3719 SIL T FENCE FAX. (434)293 -2813 CE CONTACT MR, SCOTT COLLINS, P.E. CONSTRUCTION ENTRANCE EMAIL: scott(�Acollins– engineering.com TAX MAP NO.: 032GO- 00- 00 -000A0 (D.B. 3833/ PG. 233) AREA: 1311 AC. ZONING: Cl COMMERCIAL USE. EXISTING VACANT, PROPOSED UNDERGROUND DETENTION FACILITY SUBDIVISION STREETS: CURB & GUTTER WATERSHED: NORTH FORK RIVANNA (BELOW WATER INTAKE) WATERSHED TOPO & SURVEY.• TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SURVEYOR THE ENGINEERING PERMANENT SEEDING GROUPS IN 2012. FIELD VERIFIED IN FEBRUARY 2013. NAD 83 EXISTING VEGETA TION: EXISTING TREES, SHRUBS, AND UNDERBRUSH. CRITICAL SLOPES. 3.61 ACRES (TOTAL) – 27.57' OF SITE C!P 0.59 ACRES MAN –MADE – 4.57, OF SITE CULVERT INLET PR07EC77ON ONLY THE MAN –MADE CRITICAL SLOPES IN THE VICINITY OF THE EXISTING STORMWATER uj MANAGEMENT FACILITY WILL BE IMPACTED WITH THIS WPO PLAN. FLOODPLAIN: FEMA MAP N0: 51003C0145D, PANEL NO: 01145D, DATE: 214105 TSD NOTE. THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS THERE ARE NO TEMPORARY SLOPE DRAIN FLOODPLAIN LIMITS OR WPO LIMITS ON THE PROPERTY. RETAINING WALLS.• NO RETAINING WALLS ARE PROPOSED ADJACENT PROPERTY OWNERS. • SEE EXISTING CONDITIONS, SHEET 2 RW T PHASING: NONE 1 STORMWATER MANAGEMENT FACILITY THERE IS AN EXISTING STORMWATER MANAGEMENT FACILITY LOCATED IN THE cn SOUTHERN CORNER OF THE SITE, WHICH WILL BE REMOVED AND REPLACED WITH U AN UNDERGROUND DETENTION FACILITY. :SEE SHEET 3 FOR DESIGN INFORMATION. EROSION CONTROL * VIRGINIA TROL HANDBOOK SPEC RCATION NUMBER S7B Sheet Number STRAW BAIL BARRIER 3.04 DD 2 TEMPORARY DIVERSION DIKE 3.09 ST E1pW - TEMPORARY SEDIMENT TRAP 3.13 SB q U ZN SEDIMENT BASIN 314 IP EC -2 DITCH INLET PROTECTION 3.07 SF x x x SIL T FENCE J. 05 CE CONSTRUCTION ENTRANCE 3.02 CD ® CHECK DAM 3.20 FD �■�♦■� TEMPORARY FILL DIVERSION 3.10 D V -- -� - --- �►- DIVERSION 3.12 PS PS PERMANENT SEEDING 3.32 AO TOPSOILING 3.30 C!P CULVERT INLET PR07EC77ON 3.08 uj DUST CONTROL 3.39 TSD TEMPORARY SLOPE DRAIN 3.15 SA SAFETY FENCE 3.01 RW TEMPORARY RIGHT -OF -WAY 3.11 o DIVERSION cn � t • '• 11.111•• AV 7 ctf __ / — t \, 17 /// //� 1�. t %"•/ �` \ ` \,�`' `�`<.`�. � ` �- *� \-c'• ` •-J � \� ^� � /lam' , / r 1 �/ / / / `� -. �/ i' ~T -- \` \ y _- -_.•440 O�v / ✓' �. .�' _f _ `y \\ S�7B \QT tT J - v ------ = -- -- -- r U.S. ROUTE 29 = SEMtNOLE.`TRAIL -VARFABL- &WIDTH - -° .. ATE HI 6HWAY PROJECT 6029-002 -F-19, RW202 _ �.. SHEET LAYOUT SCALE: 1" = 50' CURRENT OWNER /DEVELOPER WOODBRIAR ASSOCIATES P 0 BOX 5548 CHARLOTTESVILLE, VA 22905 COLLINS ENGINEERING 200 GARRETT STREET, SUITE K. CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293 -3719 VICINITY MAP SCALE; 1" = 21000' Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 ooJ 2�v �OPO STORMWATER MANAGEMENT DETAILS Off, ,`O EROSION & SEDIMENT CONTROL NOTES & NARRATIVE q U ZN DETAILS, CALCULATIONS & EROSION & SEDIMENT CONTROL PLAN DEPTH OF EC -3A DITCH in EC -2 DITCH g" DEPTH OF EC -2 DITCH 000 SUBJECT SITE e0U �O.qO OFFS v v oRIV E ANp O VZ AO VICINITY MAP SCALE; 1" = 21000' Sheet List Table Sheet Number Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 STORMWATER MANAGEMENT PLAN & CALCULATIONS 4 STORMWATER MANAGEMENT DETAILS 5 EROSION & SEDIMENT CONTROL NOTES & NARRATIVE 6 DETAILS, CALCULATIONS & EROSION & SEDIMENT CONTROL PLAN 6 LEGEND I' 0 TOTAL NUMBER OF SHEETS ... . ... __ EARTH DITCH DRI VEWA Y CUL VERT + BENCH MARK CLEARING LIMITS T VDOT STANDARD STOP SIGN - - - -200- - - - EXISTING CONTOUR 20o PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVA77ON ,/- TBC DEN07ES TOP /BACK OF CURB T/B DENOTES TOP OF BOX APPROVED by the Albemarle County f ILE (o NH SCOTT/W COLLINSZ" Lic. No. 035'791,2 1`SIONAL E�o� EXISTING CULVERT CUL VERT 0 DROP INLET & STRUCTURE NO. CURB CURB & GUTTER PROPOSED PAVEMENT EC -3A DITCH 6„ DEPTH OF EC -3A DITCH in EC -2 DITCH g" DEPTH OF EC -2 DITCH TOTAL NUMBER OF SHEETS ... . ... __ EARTH DITCH DRI VEWA Y CUL VERT + BENCH MARK CLEARING LIMITS T VDOT STANDARD STOP SIGN - - - -200- - - - EXISTING CONTOUR 20o PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVA77ON ,/- TBC DEN07ES TOP /BACK OF CURB T/B DENOTES TOP OF BOX APPROVED by the Albemarle County f ILE (o NH SCOTT/W COLLINSZ" Lic. No. 035'791,2 1`SIONAL E�o� w M M M M in z LU uj 0 0 o z cn U y Z w 2 w d c= p o < U U z O ti fn O w w U Vl V U. a 0 w 5 W w ce jn� w M M M 4 COLLINS R. �?. �SCO R R. �- -_ _._.__ / \ _ -- - \ \ r' '� \ /` // / /� // / U Lic. No. 035791;�� /A Q�15��IOIXVAL EIS / \ ELM I r/ x m FEE COURT (VAR -18TH EXISTING PRIVATE ROAD \ \ \ ; C -\ \ / r % ul It uj 0 0 U) G STOR'MW/A/TE/R/ U-1 ------ EXISTIN U) x i�: U) ca Z -Z MANAGEMENT FACILITY/ fff z w M D 0 z L) X x z - i cy, z r (D uj 0 ui u TRACT B 1 1 1 , zx > ui /Z x z Zz z CT B WOODBRIAR ASSOCIATES TAX MAP 32G PARCEL 1 z uj V) FE BRIARWOOD HOME OWNERS D.B. 4132, PG 472 Z, uj > ZONED:PUD ASSOCIATION INC. U-1 ce TAX MAP 32G PHASE I LOT 97 RY'00, JI HOON OR SO USE: RESIDENTI A I Z' -7 D.B. 4111, PG 477 YOUNG PARK r ZONED: PRD ------ 74 14 TAX MAP 32G LOT 70 1Z X, CIAje- ES FUSE: VI�CANT PHASE 113-2 VVOODBRIAR AS D.B. 4111, PG 477 so MAP 32G PARCEL C PHASE 1 B-2 ZONED: PRD D.B. 4111, PG 477 USE: SINGLE FAMILY TAX -7ZI- ZONED: PRD VACANT 61f SXLEH, JAMILA x USE U.1 cn cn X TAX MAP 32G LOT 7 iz- IJ cn PHASE 1 B-2 05� - -, 1--, rz� \ � i j� f / � j �f/ ` f /may\ / ( j D.B. 4111, PG 477 W "T ZONED: PRD 7- WOODBRI X8SOCIATES r7 E: SINGLE FAMILY —460 / TAX MAP 32G PARCEL B I / , , PHASE 1 B-2 7— -r -/ / 1 - /,/ � ✓ �� j f D.B. 4111, PG 477 ........ ...... . . .. ........ I lnr:!. %/Ar'AKI \ :: . ....... ZONED: PRD t5i. I slim -- '1 r ��Af�; � F, �r-, WOODBRIAR ASSOCIATES TAX MAP 32G PARCEL 1 I D.B. 4132, PG 472 h a ZONED:PUD I I I I USE: RESIDENTIAL 1J] TL' PRE- DEVELOPMENT. SCALE: 1 " =60' Ko��� ® \ ♦ \,; \_� -_ _� /� � /mil \ � W f -,, "P �j, 0v9 ,Q oo��P`' PQ \ \. 0011 �0. °`tip -� ZrAi= i /i _ A#C�EL BP SE . ' // /// / (ASE PR6DEYktPOM�NT Dr[IOS'b� \ J l /�f MPaRVI` a%Q \sF uuslM 4 / -4B--2 J \ i ______ ivy= 8.0 �� i / ' i / % �''!- /" - \ \ - - -� - -- ZONED: PRD 4 = \ _ USE. VACANT TRACT B WOODBRIAR i ��\ \ \ _ . /, ; Q �/ \ \ \_ \ TRACT A- ASSOCIATES //. pct \\Ft L WOODBRIAR TAX MAP 32G /7 j PARCEL B / ` i 4 ___ -. _- ASSOCIATES _ D.B. 3833, PG 247//// 1 TAX MAP 32G ZONED: C -1 / / / , \ \ /Z _- LN V. = 40 E. f � �\, PARCEL A USE: VACAN ( /ry / 4.00 \ , s - -. - D.B, 3833, PG 233 ` I r i �L 404 75- - _'_' ^ ^- \�Cr hr ZONED: C-1 ♦ USE VACANT 1�'� \`� J I l ` _� ■ ■ ■■ ��: `- �1� i/ 42-1 -- _ Air _ IN \ .49 X596 s_ U.S. ROUTE 2-9 - SEMINOLE TRAIL - it ATE 06HWAY PROJECT 6029 - 002 -19, RW202 WATERSHED SUMMARY 2 year Storm Event Pre - Develonment Post - Development Final Build -rout D.A #1(Pre -Dev.) 1.54 cfs D.A. #1A (Post Dev.) 0.61 cfs D.A #1(Finail Build -out) 1.48 cfs D.A #1B (Rost -Dev.) 0.77 cfs Total= 1.54 cfs 1.38 cfs 1.48 cfs 10 year Storm Event Pre - Development Post - Development Final Build -cut D.A #1(Pre -Dev.) 5.17 cfs D.A. #1A (Post -Dev.) 1.5 cfs D.A #1(Finail Build -out) 5.16 cfs D A #1B (Post Dev.) 2.19 cfs Total= 5.17 cfs STORMWATER MANAGEMENT NARRATIVE 3.69 cfs OVERVIEW: THE PROPOSED UNDERGROUND DETENTION SYSTEM SHALL BE INSTALLED AFTER UPLAND AREAS ARE STABILIZED AND THE SEDIMENT BASIN IS NO LONGER REQUIRED. REMOVAL OF THE SEDIMENT BASIN SHALL ONLY OCCUR AFTER THE COUNTY INSPECTOR HAS PROVIDED HIS /HER APPROVAL. UPON CONVERSION OFTHE SEDIMENT BASIN THE UNDERGROUND DETENTION SYSTEM CAN BE INSTALLED. THE SWIM PLAN WAS ANALYZED FOR THE POST - DEVELOPMENT STATE, WHICH IS FOR THE REMOVAL OF THE SEDIMENT BASIN & THE INSTALLATION OF THE UNDERGROUND DETENTION SYSTEM, AS WELL AS FOR THE FINAL BUILD -OUT THAT PROPOSES 36,0000sf OF FUTURE IMPERVIOUS AREA. BOTH SCENARIOS WERE COMPARED TO THE PRE - DEVELOPMENT STATE, WHICH WAS ANALYZED WITHOUT IMPERVIOUS AREAS OR A SEDIMENT BASIN TO ENSURE COMPLIANCE. POST - DEVELOPMENT: THE DETENTION SYSTEM IS CURRENTLY DESIGNED TO HAVE A GRASS GROUND COVER OVER TOP OFTHE FACILITY & DOES NOT PROPOSE ANY IMPERVIOUS AREAS. BECAUSE THE UNDERGROUND DETENTION SYSTEM WAS DESIGNED FOR THE FINAL BUILD -OUT OF THIS PARCEL, WHICH IS MORE IMPERVIOUS, IT CAN HANDLE THE POST - DEVELOMENT STATE. CALCULATIONS SIMULATING THIS CAN BE FOUND ON THIS SHEET. THIS PLAN ALSO PROVIDES INTERIM WATER QUALITY TREATMENT WITHI A REMOVAL RATE EFFICIENCY OF 15% TO HANDLE THE RUNOFF ASSOCIATED WITH THE EXISTING BRIARWOOD DRIVE & ELM TREE COURT. WATER QUALITY ASSOCIATED WITH THIS PLAN IS PROVIDED VIA WATER QUALITY SWALE. NOTE: ONLY ONE OF'THE TWO 04" LOW -FLOW ORIFICES ON THE WEIR PLATE IS TO BE INSTALLED WITH THIS PLAN. THE SECOND 04" LOW -FLOW ORIFICE ON THE WEIR PLATE IS TO BE INSTALLED AT THE TIME OF THE FINAL BUILD -OUT. FINAL BUILD -OUT: THE UNDERGROUND DETENTION SYSTEM WAS SIZED TO HANDLE THE FINAL BUILD -OUT OF THIS PARCEL, WHICHACCOUN7S FOR A FUTURE IMPERVIOUS AREA OF 16,000 sf, 1,300 sf OF OVERFLOW RUNOFF FROM THE ADJACENT PROPOSED DEVELOPIMENT AND 10,350 sf OF EXISTING ROADWAY IMPERVIOUS AREAS. THE SYSTEM HANDLES THE NECESSARY DETENTION FOR QUANITITY COMPLIANCE FOR THE FINAL BUILD -OUT, AS WELL AS THE INTERIM DESIGN (POST - DEVELOPMENT). THE FINAL BUILD -OUT' WILL PROVIDE WATER QUALITY VIA THE INSTALLATION OF A FILTERRA INLET(s) WITH A REMOVAL RATE EFFICIENCY OF74%. THIS WPO PLAN PROVIDES THE WATER QUALITY CALCULATIONS SHOWING COMPLIANCE WITH COUNTY & STATE REGULATIONS, HOWEVER THE CONSTRUCTION PLANS ASSOCIATED WITH THE INSTALLATION OF THE FILTERRA INLET(s) WILL BE PROPOSED UNDER A DIFFERENT SITE PLAN. SHOULD THE TOTAL FUTURE IMPERVIOUS AREAS EXCEED THOSE ANALYZED WITH THIS PLAN, SWIM COMPLIANCE MAY NEED TO BE REEVALUATED BY THE COUNTY AT THAT TIME. NOTE: WITH THE FINAL BUILD -OUT OF THIS DEVELOPMENT THE SECOND 04" LOW -FLOW ORIFICE ON THE WEIR PLATE SHALL BE INSTALLED. NOTES. - 1. ALL FILL EMBANKMENT MATERIAL SHALL CONSIST PREDOMINANTLY OF SOIL AND BE PLACED IN ;SUCCESSIVE UNIFORM LAYERS NOT MORE THAN 8 INCHES IN THICKNESS BEFORE COMPACTION OVER THE ENTIRE AREA IN ACCORDANCE WITH VDOT 2007 ROAD AND BRIDGE SPECIFICATION 30304. 2. VDOT STD. IS -I REQUIRED ON ALL STRUCTURES J. UNLESS OTHERWISE NOTED ALL STORM SEWER SHALL BE CORR. TYPE S HDPE, OR EQUIVALENT. THIS EXCLUDES THE UNDERGROUND DETENTION SYSTEM. SEE SWM DETAILS FOR UNDERGROUND DETENTION SYSTEM SPECIFICATIONS 4. ALL FILL SHALL BE PLACED AT 957 COMPACTION AND TESTED BY A GEOTECHNICAL ENGINEER TO ENSURE COMPACTION IS REACHED AND MAINTAINED. 5. PRIOR TO CONSTRUCTION THE CONTRACTOR SHALL TEST -DIG AT THE EXISTING INLETS & OUTFAiLLS TO 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 ORDERNNG AND CONSTRUCTION. 6. ALL PROPOSED SLOPES STEEPER THAN J. 1 SHALL HAVE A LOW MAINTENANCE GROUND COVER FOR STABILIZATION PURPOSES. THESE AREAS SHALL NOT BE PLANTED WITH A GRASS COVER FOR STABILIZATION & SHALL BE A GROUND COVER CHOSEN FROM TABLE 337C OF THE VESCH UNLESS OTHERWISE DIRECTED BY THE INSPECTOR. 7 ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR CONSTRUCTION INDUSTRY (29 CFR PART 1926) 5.16 cfs Short Version BMP Computations For Worksheets 2 - 6 Albemarle County Water Protection Ordinance: Modified Simple Method Plan: Briarwood WPO amendment Water Resources Area_ Development Area Preparers_ FGM, PE Date: 05-Apr 13 Project Drainage Area Designation DA# 1- Post- Developrill1i L storm pollutant export in pounds, L = [P(P))Rv /12 I [ C(A)2.72 Rv mean runoff coefficient, Rv = 0.05 + 0.009(1) Pj small storm correction factor, 0.9 1 percent imperviousness P annual precipitation, 43" in Albemarle A project area in acres in subject drainage area, _ A =- C pollutant concentration, mg/1 or ppm target phosphorus f factor applied to RR V required treatment volume in cy, 0.5" over imperv. area = A(1)43560(0.5/12)/27 RR required removal , L(post) - f x L(pre) %RR removal efficiency, RR100 /L(post) ImnPrvii Cnver Cmmnntatinn /valitaR in fa_pt P. nnnare fnP#1 item Outfall Control Structures Conit. Area t-development - -^ _ _ _ -_ Area Roads subtotal 2 Inflow Hydrographs Roads subtotal Outlet structure o i Hydrograph o Existing Briarwood Drive & s- 18,100 Elm Tree Court Orifice name:Barrel 0 _ �_ 18,100 Actively-grazed pasture & Area _ - -v ards and cultivated turf _100,11881x0.08= - yards 8,015 Area _ 82,088 x0-08 = _ _ 6,567 Other Impervious Areas Area (acres) 1.43o length (ft) 296.000 diameter or depth (in) 4.000 L_ _ - ._.- _-- ---- - - - - -- CN 71.800 invert (ft) 404.240 0 Impervious Cover [�L- -] [ s `LyN I(pre) I(post) Rv(post� � V New Development (For Development Areas existing impervrious cover <= 200%) C f I re R( re i L( _ R � % RR Area �e 0.23 3.25 3.83 _ 0 59 15% D_evebpment Area * pin. values _ SCS ROUTING CALCULATIONS- POST- DEVELOPMENT: Outfall Control Structures Outfall Control Structures Conit. Inflow Hydrographs Storage Input Data 5 Outlet Structures Outlet structure 2 2 Inflow Hydrographs i Storage Pipes Outlet structure o Culvert Hydrograph o Storage pipe o Orifice name:Barrel SCS name:Effective Pipe Volume name:Low -Flow Orifice multiple 1 name:2- Yr. Storm- SCS Method diameter (in) 66.000 area (sf) o.o87 discharge out of riser Area (acres) 1.43o length (ft) 296.000 diameter or depth (in) 4.000 D (in) 24.000 CN 71.800 invert (ft) 404.240 width for rect. (in) 0.000 h (in) 0.000 Type 2 angle 0.287 coefficient o.600 Length (ft) 47.2oo rainfall, P (in) 3.700 volume (cy) 26o.461 invert (ft) 404.240 Slope 0.005 time of conc. (hrs) o.11oo invert (ft) 404.240 multiple 1 Manning's n 0.010 time increment (hrs) 0.0200 Start_Elevation(ft) 404.24 Vol.(cy) 0.00 discharge into riser Inlet coeff.: Ke 0.500 time limit (hrs) 30.000 discharge '- - Equation constant set 3 fudge factor 1.00 o.i000 Outlet structure 1 Invert (ft) 404.210 routed true time increment (hrs) Weir � peak flow (cfs) 2.210 discharge into riser name:Emergency Spillway Outlet structure 3 peak time (hrs) 11.923 length (ft) 4.000 Weir volume (cy) 238.496 U side angle 0.000 name:Access Riser routed true coefficient 3.300 diameter (in) 48.000 side angle 0.000 Hydrograph 1 SCS Routing Method: storage- indication invert (ft) 408.890 Z name-.Overflow Orfices multiple 1 coefficient 3.300 name:lo- Yr. Storm- SCS Method discharge into riser invert (ft) 414.000 Area (acres) 1.43o 2- Yr. Storm- SCS Method v multiple 1 CN 71.800 inflow (cfs) 2.209 at 11.92 (hrs) J discharge into riser Type 2 discharge (cfs) 0.612 at 12.10 (hrs) Q rainfall, P (in) 5.600 water level (ft) 406.532 at 12.10 (hrs) Outlet structure 4 time of conc. (hrs) o.lzoo storage (cy) 61.241 invert (ft) 4o7.890 Orifice time increment (hrs) o.o2oo r-i U-) name :Overflow Orfices time limit (hrs) 30.000 10- Yr. Storm- SCS Method O area (sf) o.196 fudge factor 1.00 inflow (cfs) 4.719 at 11.92 (hrs) diameter or depth (in) 6.000 routed true discharge (cfs) 1.504 at 12.10 (hrs) width for rect. (in) o.000 peak flow (cfs) 4.719 water level (ft) 408.128 at 12.10 (hrs} coefficient o.600 peak time (hrs) 11.923 storage (cy) 153.720 invert (ft) 407.890 volume (cy) 509.340 multiple 4 L discharge into riser mrim ILI�I „ .. ti ... . WOODBRIAR ASSOCIATES TAX MAP 32G PARCEL 1 D.B. 4132, PG 472 ZONED:PUD USE: RESIDENTIAL FINAL BUILD OUT., SCALE: 2 " =60' /bAy1.74ac A /CN =8,x.3 =5f] /OF S P� � A PR� YPA L-- \ - , PROPOSED DE V ,OPMENT BY \ TO BYPASS HIS DEVELOP! SEPARAT WM TREATMTREATM oR- '0 P \\ \ J G Q 3 Q5 \ s � I ..1 \ \ \ E �C, F -FUTU! i , ENT (36;000sfgF - / \ \ L -134 RVIO AREAYli r, _ 432 ED WITH Ty1S-SE3_OF ` h , S- WATER QUALITY LINS ENOlfgRING U.S. ROUTE 29 - SEI\ TAqD RECEIVE _ VARIABLE WI & DETENTE ATE HIdHWAY PROJECT Short Version BMP Computations For Worksheets 2 - 6 Albemarle Country Water Protection Ordinance: Modified Simple Method Plan: Briarwood WPO amendment Water Resources Area: Development Area _ Preparer: FGM, PE Date: 06 -Auu-13 Project Drainage Area Designation DA# 1- Final Buildout L storm pollutant export in pounds, L = [P(P))Rv/12) [ C(A)2.72 Rv mean runoff coefficient, Rv = 0.05 + 0.009(1) Pi small storm correction factor, 0.9 1 percent imperviousness P annual precipitation, 43" in Albemarle A project area in acres in subject drainage area, A= C pollutant Iconcentration, mg/I or ppm target phosphorus f factor applied to RR V required treatment volume in cy, ii over imperv. area = A(1)43560(0.5/12)/27 RR required removal, L(post) - f.x L(pre) %RR removal efficiency , RR100 /L(post) �.., .........:...... n........ tI.........4�o- in fm* R ansinra faa +% Item _ re- develoopment - -� ?� TMENT$ MENTION Area Roads ' \\ zs C L ULATiONS FOR FUT'URE� Roads subtotal Existing Briarwood Drive 10,350 Proposed Offsite Imp. Area 1,300 Future Impervious Areas from 36,000 Parcel, Access Road & Bnarwood Dr. Area _� 28,144 x 0.08 = 47,650 - -- a - L -0PMENT AI3E PROPOSED - Actively-grazed pasture & Area yards and cultivated! turf 75,794 x 0.08 = 6,064 2,252 Other Impervious Areas Area (acres) 1.74o - FILTER INkET(s) wtA-- name:Low -Flow Orifices multiple 1 MOVAL R/�TJ� EFFICIENCY OF diameter (in) 66.000 area (sf) o.o87 4 °f°-SHALL EANSTAL'LED Wl-- If iDE P IRME RETAINING G WALL -& _ - - -- i S} width for rect. (in) o.000 -- - -- - _� O angle 0.287 coefficient o.600 Length (ft) 47.200 time increment (hrs) 0.0200 volume (cy) 260.461 invert (ft) 404.240 Slope 0.005 time limit (hrs) 30.000 multiple multiple 2 Manning's n 0.010 fudge factor 1.00 Start_Eievation(ft) rRAIL discharge '- - Short Version BMP Computations For Worksheets 2 - 6 Albemarle Country Water Protection Ordinance: Modified Simple Method Plan: Briarwood WPO amendment Water Resources Area: Development Area _ Preparer: FGM, PE Date: 06 -Auu-13 Project Drainage Area Designation DA# 1- Final Buildout L storm pollutant export in pounds, L = [P(P))Rv/12) [ C(A)2.72 Rv mean runoff coefficient, Rv = 0.05 + 0.009(1) Pi small storm correction factor, 0.9 1 percent imperviousness P annual precipitation, 43" in Albemarle A project area in acres in subject drainage area, A= C pollutant Iconcentration, mg/I or ppm target phosphorus f factor applied to RR V required treatment volume in cy, ii over imperv. area = A(1)43560(0.5/12)/27 RR required removal, L(post) - f.x L(pre) %RR removal efficiency , RR100 /L(post) �.., .........:...... n........ tI.........4�o- in fm* R ansinra faa +% Item _ re- develoopment Area t- development Area Roads subtotal 0 Roads subtotal Existing Briarwood Drive 10,350 Proposed Offsite Imp. Area 1,300 Future Impervious Areas from 36,000 Parcel, Access Road & Bnarwood Dr. Area _� 28,144 x 0.08 = 47,650 1 Storage Pipes Outlet structure o - Actively-grazed pasture & Area yards and cultivated! turf 75,794 x 0.08 = 6,064 2,252 Other Impervious Areas Area (acres) 1.74o name - Effective Pipe Volume name:Low -Flow Orifices Impervious Cover L ' .`�"/o I(pre) Rv st V 0.64 7 _6, New Development For Development Areas existing imp@ry ious cover <= 21A C f I ( re) * Rv(pre) I L( re) L st) I RR % RR Area Type 0.231 2.46 1 6.86 T 4.41 ;', :64 °lo Development Area * min. values I i 1(post) discharge SCS ROUTING CALCULATIONS- FINAL BUILD -OUT: Inlet coeff. Ke 0.500 Outfall Control Structures Outfall Control Structures Cont. Inflow Hydrographs Storage Input Data 5 Outlet Structures Outlet structure 2 2 Inflow Hydrographs 1 Storage Pipes Outlet structure o Culvert 2- Yr. Storm- SCS Method Storage pipe o Orifice name:Barrel Area (acres) 1.74o name - Effective Pipe Volume name:Low -Flow Orifices multiple 1 CN 84.26o diameter (in) 66.000 area (sf) o.o87 discharge out of riser Type 2 length (ft) 296.000 diameter or depth (in) 4.000 D (in) 24.000 rainfall, P (in) 3.700 invert (ft) 404.240 width for rect. (in) o.000 h (in) o.000 time of cone. (hrs) o.l000 angle 0.287 coefficient o.600 Length (ft) 47.200 time increment (hrs) 0.0200 volume (cy) 260.461 invert (ft) 404.240 Slope 0.005 time limit (hrs) 30.000 multiple multiple 2 Manning's n 0.010 fudge factor 1.00 Start_Eievation(ft) 404.24 Vol.(cy) 0.00 discharge into riser Inlet coeff. Ke 0.500 routed true 407.5zo at 12.o8 (hrs) storage (cy) 117.o43 Equation constant set 3 peak flow (cfs) 4.703 Outlet structure 1 Invert (ft) 404.210 peak time (hrs) 11.917 Weir storage (cy) 198.247 volume (cY) 497.909 name:Emergency Spillway Outlet structure 3 length (ft) 4.000 Weir 10- Yr. Storm- SCS Method side angle 0.000 name: Access Riser Area (acres) 1.74o coefficient 3.300 diameter (in) 48.000 CN 84.26o invert (ft) 408.890 side angle 0.000 Type 2 multiple 1 coefficient 3.300 rainfall, P (in) 5.600 discharge into riser invert (ft) 420.000 time of conc. (hrs) o.i000 0 multiple I time increment (hrs) 0.0200 � discharge into riser time limit (hrs) 30.000 -WW wu7 fudge factor 1.00 U Outlet structure 4 routed true Orifice peak flow (cfs) 8.5o1 Z name-.Overflow Orfices peak time (hrs) 11.917 o area (sf) o.196 volume (cy) 899.998 o v diameter or depth (in) 6.000 0 Z J v width for rect. (in) o.000 z Q H coefficient o.600 invert (ft) 4o7.890 z � r-i U-) multiple 4 w O discharge into riser Routina Method: storaae- indication 2- Yr. Storm- SCS Method inflow (cfs) 4.681 at 11.92 (hrs) discharge (cfs) 1.48o at 12.o8 (hrs) water level (ft) 407.5zo at 12.o8 (hrs) storage (cy) 117.o43 10- Yr. Storm- SCS Method inflow (cfs) 8.461 at 11.92 (hrs) discharge (cfs) 5.155 at 12.04 (hrs) water level (ft) 4o8.913 at 12.04 (hrs) storage (cy) 198.247 TH pF� SCOT R. COLLINSZ f-., Lie. No.( 035791,E �'S ONAL ���� Ifyf M M 1-1 M w � � •-i n M o Z w z LU 0 J G 0 � tt� -WW wu7 U g w Z o o v 0 Z J v z Q H t~r z � r-i U-) w w O w LU L o w LU uJ ce Ifyf M M 1-1 M w � � •-i n UNDERGROUND DETENTION - SYSTEM DETAIL: \ SCALE: 1 " =20' Y- / N CT S LL PLUG & ABANDON TING / OUT A IPE FIELD' FIT STR.3 DIRECTIN NOFF TO T D NTI�N SYSTEM"NTRACTOR S L FIELD FIT / ST T TOP OF THE PIPE IS IMME I ELY BELOW / RB INE AT THE INLET TO ENSU %lG ATER D NS O THE WATER QUALITY SW & D SNOT / O ON RIARWOOD DRIVE. (NOTE: OF 6TENTI o . O / SYSTEM EXISTING TOP F UR \ �\ p 7 STR. 3 INSTALL 148" ACCESS RISER FOR INSPECTION - & CLEAN -OUT NEAR �' 0 IN _ INFLOW POINT 40.97 015" INV. IN= 406.94' 066" INV.= 404.98' BYPASS! -- ERFLOW P E� S SWALE BMP w/ WQ RR= 5 >,A P SITIVE DRAINAGE TO EX. I L T LRAPEZOIDAL CHANNE " NOTES: \ \ \ -/ // / / 1- TRASHRA5K SHA(- BENS ALLED.ON A L O IFIC�,S, \ ROPO,S�D VARrAABLE� / INCLUDING THOS CA ED A NG THE WEIR�\'LA S 1DT SWM/EASEMENT WITHIN THE UNDERGROUNQ DE NTIgN SYSTEM, IN \ \ ` ACCORDANCE W/ HE d�TAIL SHO NON THI SHE T / 2. HUGGER BANDS SHALL BE LOCATE AT ALL JOINTS W/ M � . `T / PIPE SPACINGS OF 24 , SEDEI\AIL ON THIS SHEET. 3. UNDERGROUND DETE ION SYS�EM PtFING\SHALL BE 066" ROPED GRADED ao' WIDE CONTECH 12 GA. ALUMIt4),ZE TYP CI111t?. � \ \i \\ LEVEL EARTHEN ACCESS ROAD. 4. UNDERGROUND DETENTION SYSTEM\PIPING SH LL Bit APPRO�CIMATE ELEV. t / 414 INSTALLED w/ ADEQUATE ST\ONE ACKFILLit\AC RDANCE 114fGH POINT OF UNDERGROUN w/ MANUFACTURER'S SPECIFICATIONS. \\ \ \ �DE3FNTION SYSTEM, INV. 405-04' 5. FUTURE RETAINING WALLS SHALL HAVE GEOGI��S f�L�10ED �\ (NOTE: LOW POINT OF ABOVE THE CMP DETENTION SYSTEM\ NDERGROUND DETENTION SYSTEM \ IS AT OUTFALL POINT, INV:= 404.21.') \ \ 1' TALL WEIR PLATE UNDERGROUND DETENTIO SEE WEtR PLATE DEf AIL O THIS DIRECTING- WQiVOLUM€('1x) - -__ __ SYSTEM TO DETAIN 2 & N\ \ \\ I TO 03" ORIFICE ON 1 txYEAR STORM EVENTS SHEET (LOW PT. ELEV. 1,04.24\ i DOWNSTREAM WEIR PLATE -- - _ _ - - 066" INV-= `\ � \` % \ \�� \% -- - - -- - - - - - -- �- - -- 404.31 0.5�� - 40' (TYP.) _ CONTRACTOR $fiALL PLUG & REMOVE I HE _ EXISTING RISER & BARREL--EXISTING - STRUCTURE S - -- ' -� -� -" - -- - _ SERVE AS THE OUTFALL FOR THE AW' UNDERGROUND DETENTION SYSTEM & 404.24 - WATER QUALITY-SWALE-.- - 2_048" ACCESS RISERS FOR 4 - -- - INSPECTION&.�LEAWOUT -- - �- _ - -- '- -_AT OUTFLOW POINTS ON�. DTHE _SIDE OF WEIR PLATE 9.5 Wx Lx46"=18_D; S <3 0 DOT ST D C L. I 1 EC-1 R 1 PRAP L N D FO EB A Y GE TEXTILE tLTER FABRIC UNDERLAYME AT PIP OUTFALL ""TALL- ROCK FOREBAY DAM T END F FOREBA . 1' T/CLL WEIR PLATE W/ 3 6E - (L =5', D =2 W =9.5') / LOW POINT TO PRE A SLOW RELEASE &DIRECT VPATER QUALITY ~- VOLUME (1x) TOT E GRASS SWALE BMP SLIP DINT # . Id " 4M i c i! 1 Technical Bulletin 7 Minimum Standard 3.02 VW slop Plnt.d hook ettsabwt .irk 3/a' talw.r S ,00 Isometric I " OA/ Section 6/5* 'Ho' IIde , ,r.Jc I C�K a i W9 u. and .14" .emu mawn2rai 1;erea tv r'lesrte Solwdo® roe. or equal • shown wM ovtk" Plat* ,a IMPS str,wtaral rra.lra w9b llr��e,...a BotnR3oaa Sore. oe wy,wl eta Ha' -i ------------------- - Elevation PLAMIC .s BMP DEBRIS CAGE SUi:U2'taNS vatt�Irk> INS esc ne TD7 -3 =Aid iL :ra CONTM Prniant NAma- City f County: State: Designed By: 6W. 2r WIDE SAIND il"O" 1118ER P-15INF01MI1,143 tIF MzF UIswO) --- 04r,04P AGMS Ri ER. PL AK VIEW CONTIM9 LIMP DtiFO ©N SYSTEMS Fvrdw:silp asawtarwe, drdliPilW, and pricinm surd cw4fttad wQfthftt t4: rfyroUS�urttecttrcpl -C4m Enter Information in luw C I Limiting Width (ft): Invert Depth Below Asphalt (ft): Solid or Perforated Pipe: Shape Or Diameter (ink 7n 3.76 1? Pipe Area Number Of Headers: Spacing between Barrels (ft): stone Width Around Perimeter of system Litt Depth A. Porous Stone Above Pipe (in): Depth C. Porous Stone Below Pipe (in): Stone Porosity (0 to 40% k Porous Stone Storage: 0 of Total Storage Provided: 7,021 of 100.3*: Of Required Number of Barrels: 2 barrens ,- -~-�p "t VDOT STD. CL. II C -1 RIP LINE ,E l7 OREBAY w/ GEOTEXTI E FILTER Root afar Foot int (1d x L): FABRIC UNDERLAYMENT PIP Total CMP Footage: OUTFALL AND B" TALL ROCK OREBAY DAM* AT END OFIFOREBAY E (L=5', D =2', W =9: ` -_ . -E-51) - Approximate Coupling Bands: 14 bands 6W. 2r WIDE SAIND il"O" 1118ER P-15INF01MI1,143 tIF MzF UIswO) --- 04r,04P AGMS Ri ER. PL AK VIEW CONTIM9 LIMP DtiFO ©N SYSTEMS Fvrdw:silp asawtarwe, drdliPilW, and pricinm surd cw4fttad wQfthftt t4: rfyroUS�urttecttrcpl -C4m Enter Information in luw C I Limiting Width (ft): Invert Depth Below Asphalt (ft): Solid or Perforated Pipe: Shape Or Diameter (ink 7n 3.76 1? Pipe Area Number Of Headers: Spacing between Barrels (ft): stone Width Around Perimeter of system Litt Depth A. Porous Stone Above Pipe (in): Depth C. Porous Stone Below Pipe (in): Stone Porosity (0 to 40% k Porous Stone Storage: 0 of Total Storage Provided: 7,021 of 100.3*: Of Required Number of Barrels: 2 barrens L�„ythkr,Danrl. 1x4.0 ft Length Per Header: 13.8 It Root afar Foot int (1d x L): 13.75 ft st 145. ft Total CMP Footage: 29 it AkklvreuwvTuts(Pivvwt. 14 pv: Approximate Coupling Bands: 14 bands A aximate Truckloads: 7 trucks Tote! Excavation: #VALUE! cy Porous Stone BackftlI For Storag 0 oy stone Backfill to Grade Excfuding Ston. #VALUE( oy fill ..�'�e1'�P.?lJt�T�.�� a7fNj37tk7G4�{r� L2dOV7J7IJP719 %t7�3�2: i NOTES AXLE L (kips) ING1.1ra ALL RISER AND STUB( DIMENSIONS AFW TO CENTERLINtz OVERFLOW WEIR TO CARRY NIMUM CGVER (FT) ALL ELEVATIONS.. DIMENSIONS, AND LOCATIONS OF NOTES: STORMS APPROX. IN EXCESS OF 10 -YEAR EVENT /-OVERFLOW AREA IS APPROX. EQUIVALENT RISERS AND INLETS, SHALL BE VERIFIED BY THE 1. SWM FACILITYs ORIFICE COEFF. =0.60 & WEIR g D 0, TO THE AREA OF A 021 "PIPE. ENGINEER OF RECORD PRIOR TO RELWING FOR COEFF. =3.33 4- 06" ORIFICES 5,0± FABRICATION, 2. DETENTION SYSTEM TO BE PRE - MANUFACTURED INSTALL TRASH RACKS EMERGENCY OVERFLOW o -85 SPILLWAY/WEIR ELEV.= 4o8.89 Aj4 AND DELIVERED TO THE SITE. ALL INSPECTION ON ALL ORIFICES (TYP.) 1 ♦ ALL FITTINGS AND REINFORCEMENT COMPLY WITH MANHOLES, HEADWALLS, AND WEIRS SHALL BE ELEV. 407.89 ASTM AWO. INSTALLED PRIOR TO BEING DELIVERED TO THE SITE REINFORCED 12 GA. Ln ''n TO PREVENT CORROSION WEAKNESS AT THE JOINTS. STEEL PLATE '" ALL RISMS MD STUBS ARS 2W X W CORR1.10ATION M AND 1B GAGE UNLESS OT EERWISE NOTED, 3. PLEASE CONTACT COLLINS ENGINEERING INSTALL ONE (1) 04 " LOW -FLOW (434.293.3719) & GREG NESTER OF CONTECH ORIFICE AT LOW POINT OF SYSTEM ELEV. = 404.24 RI+91ERRS TO Be FIIrt.17WMMBD TO GRADE, Construction Products, INC (540.297.0080} REGARDING ANY QUESTIONS CONCERNING THE w/ (PROPOSED PLANS. INSTALL A SECOND 04" LOW -FLOW ORIFICE UNDERGROUND DETENTION SYSTEM. ATTIME OF FINAL BUILD OUT 066" WEIR PLATE DETAIL * 1E MADE "x wX', �2� �s . P r Z w PU SCALE:2 " =5' FOUNDA`CIONA9ED PIING PREPARATION KEY 1. RIGID OR FLEXIBLE PAVEMENT 30 2. GRANULAR ROAD SASE B, 12" MIN, FOR DIAMETER$ THROUGH 18" MIN, FOR DIAMSTERS FROM 102`" AND LARGER MEASURED TO TOP OF RIGID OR BOTTOM OF FLEXIBLE PAVEME NIT. 4. SELECT GRANULAR FILE._ PER AASHTO M145 Al. A2 OR A% OR APPROVED EQUAL, PLACED IN $' LIFTS (COMPACTED TO MIN. 90% STANDARD DENSITY PER AA HTO T",) a. GRANULAR BEDDING, ROUGHLY SHAPED TO FIT THE BOTTOM OF PIPE, 4V TO 60 IN DEPTH PRIOR �£ PLACI N ' HE BEDDING, THE FOUNDATION MUST SB CONSTRUCTED TO A UNIFORM AND STA BLE GRAD E, IN THE EVENT THAT• UNSUITABLE FOUNDATION MATERIAL$ ARE ENCOUNTERED DURING EXCAVATION, THEY SKkLL BE REMOVED AND BROUGHT BACK. TO THE GRADE WITH A FILL MATERIAL AS APPROVED BY THE ENGINEER. ONCE THE FOUNDATION PREPARATION IS COMPLETE, 4" - B" OF A 1NBE.L- GRA�tBf� GRANULAR MATERIAL. SHALL BE PLACED AS THE SEDDING, BACKFILL THE SAC( FILL SHALL SEAN At A2 OR.AB GRANULAR FILL PER. AASHTO M146, OR A WELL-GRADED GRANULAR, FILL As APF'Ri]wB BY TrHE SITE ENGINEER (SEE IfNBT,A1LLATION GUIDELINE-13). THE. MATC -RIAL t1H/ALL BE ('LACED IN W LOOSE LIFTS AND COMPACTED TO 90 AtASHTO T99 STANDARD PROCTOR DENSITY, WHEN PLACING THE FIRST LIFTS OF BACKFILL IIT IS IMPORTANT TO E. SURt WHAT THE BACKIFILL IS PROPERLY COMPAOT'EO UNDER AND AROUND THE PIPE I IALINCHES. BACKFILL SHALL ICE PLACED SUCH THAT THERE IS NO MORE THAN A► TWO LIFT (1B") DIFFERENTIAL IBETWEEN ANY OF THE PIPES AT ANY TWAE DURING THE BACKFILL PROCESS. THE BACKFILL SHALL SE ADVANCF -D ALONG THE LENGTH OF THE DETENTION SYSTEM AT THE SAME RATE TO AVOID DIFFERENTIAL LOADING ON THE PIPE, OTHIERALTERVATE BACKFILL, MATERIAL MAY BE ALLOWED DEPENDING ON SITE SPECIFIC CONDITIONS, A$ APPROVEU BY SITE ENGINEER.. MEN I- I*Bi�,;l�"# T14ETt()P OF THE PlilRlu. THE 4iEICF417 JF GH&L MEET THE 141FIII 11A9REr�ul� tai IS SM-i YN IN THE TABLE BELOW. THE 0 B I`iF WAW t' JB.T ON EWIIII T WCFM7ATE9 DRE,ATM PRII }TFfION FOR THE- 7WM FINI D 0 R ADE CMEN MINIM I 6! FOAL Ii QRkft- N11 ;i IWA t' TIIk4FF10. PIPE SPAN, AXLE L (kips) ING1.1ra la43 a ?S 7r,11; 1 11NIN 11 NIMUM CGVER (FT) 2-A t.4 �010 314 1244 IB 1 g D T.II 4i:5 AA 78.1 6 5,0± 3.6 AJ Aft 71W44 Aj4 1 4.0 1 4,& 1 'MNIWIA COVER ri#i VARY. 1i9POIDINGONLIB'iI VDMONE. T NT TI ORMU Tp". 1014 T ITIOM TIME TUPOFTHE 19i AINTJURO CON 1JiO (*1 AY W# E, ",ME: N.T, . BOLT. BAR AND STRAP CONNECTOR WA* EBAIR oweocr mm.� rw e � r► t ill H42. HUGGER GENERAL NOTES 1, BANDS ARE NORMALLY FURNISHED AS FOLLOWS. 12" T'HRU A ',1 -PIECE III° THRU 94T', 2 -PIECE 102"' THRU 144 NIECES 2, 9ANDFAST5NERS AREATTACHED WITH SPOT WEmLDS1 RIVETS Oft HAND WELDS 3, RIEROLLED ANNULAR END CORRUGATIONS ARE (NORMALLY 2w XV, DIMENSIONS AIRE SUBJECT TO MANUFACTURING TOLERANCES &A&KFrMIATMK NZOR �iJF{PIorGIL''6`IT Vii$ I�'69E�'f'P.tffi' �""'°�"°" St d If# OeARING ON MWER TO OR P r VID�y1�1t3 BY pf /�figy 'ft'8,177I�C�'r ,"J,f.StT. 11 W� 104 DIAOCINAL•TFJM 19AR (NP.4 ISLA�GB r), r- q 3 Yti SECTION VIEW a `,W THICK r MIN. WIDE FLAT NEOPRENE GASKET *k ASSUMED SOLMEARING CM *CITY TH 0 SCOTT R. COLLINS'Z U Lie. No. 035791 a� Q �SSIONAL E�01 M MEtl rl y in n N a z r•: •" t4 Q O Gl 8 r Z w PU *k ASSUMED SOLMEARING CM *CITY TH 0 SCOTT R. COLLINS'Z U Lie. No. 035791 a� Q �SSIONAL E�01 M M M M ` STANDARD STANCIYM W � m4l "PO IN a1NFQKjq z r FICA710N Fi OATEED 0TE AI FFmALLMIM TYPE 26EEL MWI)L G D AMEB.Y B TABLE E TAKE (.n ILL SCOPE LSE IN ACOORDANOE WITS BBr 4A IMTI CF ROUND �� OPTION � IOW OPTION � �I�� 0 z fAIrIO & IW110ATD6� 0101 d1CM 0) THIS TT14E C>+ OT EL PIf- Wj) W-T� ICW E I FA04 Y F tdF (W PAS o 6. 1W! A Illil �,,�//r wegAUL 1. BENIGN INIA€C M01015 M, IH E 1 501110N. 1 TIIM Its C H BIAt Ir . . 1C F} LLI ILL., MWL BE IN ACCOMIANGE YVM AA3tf T O 5TME#111 W B ARt A MNIWJM 6F Ir NID 41KI I SEND W THIIIAW)ANIZEEITYRE2 VM. COLS SKAILL CONFORM TO TM APPLICA 9LE, SPIECIFICATI fN+JS FCR NOWAY INDGES, SMIDN 2il, 21 M, ION LOW hm 814M M FWQUIRU TO MAINTAIN OM COWER, fltMORVIUI;I AVAAAWTIMIUWAFIR ARM AWO MNIMIONIIOIIk .A ffl_W.ATIIPA;NMICJ��� IMF t• � Fa-rl i WIfl'1 THE I WI�OT "O A14I8' WI�QIPICAiIT19N% S. PAW = fl MAX. It PWITMON 81,jM AND A L WAIMIALS TO MME Q G IF THERE AflF ll'(I±�I tl' lltGO +ISI hTENGIE S (DGONR ICT;S I* `tI ED+sAN I I#IT iti il'd Ut THU CMAWOR $RWU'3 DISCUSS AN O MSOLVE A. iC EI (STRO GIN ■ I Pal /�'� � THE Al BE I N FaA U ICI Ate ` Inn THE:. MJ- I"41 r 6 i�E~I0h4t#1k Its 13ETA§1L EIP�1C�!M l61P DELTiEA Cf M�IEEFIIM � �1N G ' CEN„ I+tA 4a W = MW00 TBQf HI V0111,011 . , iii, THF.P'I 111='BAP4 �. i�lN it�� -= iii >1 N a AMP ]RU13AT OWN � 911 AS &I4tJA rAl I THE FROJECT KAN III' IS ALWAYS VNE RESP 181LITY OF THE GOhtT AtCT'O TAIFOLL:€I'lh' OSHA GUINILINES FOR M W7 f3IEAEVNC . 6. � Mt�a �. � MANHOLE CAP DETAIL ALL FABRICATION `L1F THE PRODUCT Sh1IA,L IL COW, WITHIN THE a HALFEArPH 911011. ADDITIONAL SAft TCB11 Ittl CALF: I�."I' S. L UA11ED STATE$. THE E r ME U 24" MIN. COVER UNDER PAVEMENT (TYP.) 12" MIN. COVER UNDER SOIL (TYP.) w s General Construction notes for Stormwater Management Plans o w - 1. All dams and constructed 6111 to be within 95% of maximum d -_ __- LIMITS OF oc s C dry - - . _ .gym -- _ - - LIMITS OF Q- t/) C density and 2% of optimum moisture content. All fill material to be aAltt JOB No. Q approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 12CY TYR X TYR 3' MIN. miff*. 2207 2. Pipe and riser joints are to be watertight within storrnwater Management facilities. _ _ - SCALE z 3. For temporary sediment traps or basins which are to be converted to - - AS SHOWN ` permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from SHEET NO. t the County erosion control inspector. FOR ADDITIONAL TYPICAL SECTION VIEW BACKFILL INFORMATION, BCALE: N.T.S. SEE THIS SHEET M rl in n N a z U.1 E Q O Gl 8 r Z w ctr Cd O p M Iv _I < V z w Z H w Z w O U ,>r uC a Lu L3 LU Pi W uj c M M M M ` STANDARD STANCIYM W � m4l "PO IN a1NFQKjq z r FICA710N Fi OATEED 0TE AI FFmALLMIM TYPE 26EEL MWI)L G D AMEB.Y B TABLE E TAKE (.n ILL SCOPE LSE IN ACOORDANOE WITS BBr 4A IMTI CF ROUND �� OPTION � IOW OPTION � �I�� 0 z fAIrIO & IW110ATD6� 0101 d1CM 0) THIS TT14E C>+ OT EL PIf- Wj) W-T� ICW E I FA04 Y F tdF (W PAS o 6. 1W! A Illil �,,�//r wegAUL 1. BENIGN INIA€C M01015 M, IH E 1 501110N. 1 TIIM Its C H BIAt Ir . . 1C F} LLI ILL., MWL BE IN ACCOMIANGE YVM AA3tf T O 5TME#111 W B ARt A MNIWJM 6F Ir NID 41KI I SEND W THIIIAW)ANIZEEITYRE2 VM. COLS SKAILL CONFORM TO TM APPLICA 9LE, SPIECIFICATI fN+JS FCR NOWAY INDGES, SMIDN 2il, 21 M, ION LOW hm 814M M FWQUIRU TO MAINTAIN OM COWER, fltMORVIUI;I AVAAAWTIMIUWAFIR ARM AWO MNIMIONIIOIIk .A ffl_W.ATIIPA;NMICJ��� IMF t• � Fa-rl i WIfl'1 THE I WI�OT "O A14I8' WI�QIPICAiIT19N% S. PAW = fl MAX. It PWITMON 81,jM AND A L WAIMIALS TO MME Q G IF THERE AflF ll'(I±�I tl' lltGO +ISI hTENGIE S (DGONR ICT;S I* `tI ED+sAN I I#IT iti il'd Ut THU CMAWOR $RWU'3 DISCUSS AN O MSOLVE A. iC EI (STRO GIN ■ I Pal /�'� � THE Al BE I N FaA U ICI Ate ` Inn THE:. MJ- I"41 r 6 i�E~I0h4t#1k Its 13ETA§1L EIP�1C�!M l61P DELTiEA Cf M�IEEFIIM � �1N G ' CEN„ I+tA 4a W = MW00 TBQf HI V0111,011 . , iii, THF.P'I 111='BAP4 �. i�lN it�� -= iii >1 N a AMP ]RU13AT OWN � 911 AS &I4tJA rAl I THE FROJECT KAN III' IS ALWAYS VNE RESP 181LITY OF THE GOhtT AtCT'O TAIFOLL:€I'lh' OSHA GUINILINES FOR M W7 f3IEAEVNC . 6. � Mt�a �. � MANHOLE CAP DETAIL ALL FABRICATION `L1F THE PRODUCT Sh1IA,L IL COW, WITHIN THE a HALFEArPH 911011. ADDITIONAL SAft TCB11 Ittl CALF: I�."I' S. L UA11ED STATE$. THE E r ME U 24" MIN. COVER UNDER PAVEMENT (TYP.) 12" MIN. COVER UNDER SOIL (TYP.) w s General Construction notes for Stormwater Management Plans o w - 1. All dams and constructed 6111 to be within 95% of maximum d -_ __- LIMITS OF oc s C dry - - . _ .gym -- _ - - LIMITS OF Q- t/) C density and 2% of optimum moisture content. All fill material to be aAltt JOB No. Q approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. 12CY TYR X TYR 3' MIN. miff*. 2207 2. Pipe and riser joints are to be watertight within storrnwater Management facilities. _ _ - SCALE z 3. For temporary sediment traps or basins which are to be converted to - - AS SHOWN ` permanent stormwater management facilities; conversion is not to take place until the site is stabilized, and permission has been obtained from SHEET NO. t the County erosion control inspector. FOR ADDITIONAL TYPICAL SECTION VIEW BACKFILL INFORMATION, BCALE: N.T.S. SEE THIS SHEET EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES SHALL BE IN ACCORDANCE 107H THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRAC77CES USED IN THIS' SEC77ON CONSIST OF 7HE FOLLOWING: 3.02 CONSTRUG77ON ENTRANCE: A STABILIZED PAVED CONS7RUC77ON ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD 7RANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUC77ON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 3.05 SILT FENCE: A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYN7HE77C FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING C0NS7RUC77ON OPERA77ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO- MODERATE LEVEL CHANNEL FLOWS 774E SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.13 TEMPORARY SEDIMENT TRAP: A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG AN EAR7HEN EMBANKMENT Wl7H A STONE OU77 ET. 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 7HE TOTAL CON7RIBU77NG DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT 7RAP WILL BE USED NO LONGER 7HAN 18 MONTHS, AND IT MAY BE CONS7RUC7ED EITHER INDEPENDENTLY OR IN CONJUNC77ON WITH A TEMPORARY DIVERSION DIKE. 3.31 TEMPORARY SEEDING: THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION AND SEDiMENTA77ON BY STABILIZING DISTURBED AREAS THAT KILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT iS ECONOMICAL, ADAPTABLE TO SITE CONDI770NS, AND ALLOWS SELEC71ON OF THE MOST APPROPRIATE PLANT MA7ERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLE77ON OF CONSTRUC77ON AC77W77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. 3.36 SOiL STABILIZATION BLANKETS & MATTING- THE INSTALLATION OF A PR07EC77VE COVERING (BLANKET) OR A SOIL STABILIZATION MAT ON A PREPARED PLAN77NG AREA OF A S7EEP SLOPE, CHANNEL OR SHORELINE. TO AID IN CONTROLLING EROSION ON CRI77CAL AREAS BY PROVIDING A MICROCLIMA7E WHICH PROTECTS YOUNG VEGETATION AND PROMOTES 17S ESTABLISHMENT. APPLIES ON SHORT, STEEP SLOPES WHERE EROSION HAZARD IS HIGH AND PLAN77NG IS LIKELY TO BE TOO SLOW IN PROVIDING ADEQUA7E PR07EC77VE COVER. 3.39 DUST CON7ROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND CONS7RUC77ON AC77W77ES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE 774E PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL 7H HAZARDS, 7RAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LiFE. DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONS7RUCT70N. MEASURES EMPLOYED SHALL BE IN ACCORDANCE W1774 THE VESCH. EROSION CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA77ONS VT 625 -02 -00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AU7710RITY MUST BE N077FIED ONE WEEK PRIOR TO THE PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO THE FiNAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CON7ROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON 774E S17E AT ALL 77MES ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS 07HER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIM17ED TO, OFF -S17E BORROW OR WASTE AREAS), THE CON7RACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CON7ROL PLAN TO 7HE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES -6: THE CON7RACTOR IS RESPONSIBLE FOR INSTALLA7ON OF ANY ADD177ONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES -7: ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING Si7E DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED. ES- 8.•DURING DEW47ERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIA l EL Y. EROSION CONTROL NOTES General construction notes for Erosion and Sediment Control plans i. The plan approving authority must be notified one week prior to the pre- construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regulations VR 625 -02 -oo Erosion and Sediment Control Regulations. 3. All erosion and sediment control measures are to be placed priorto or as the first step in clearing. 4. A copy of the approved erosion and sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off -site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved. 8. During dewatering operations, water will be pumped into an approved filtering device. g. 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. 1o. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13 -301 of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:ooam to g:oopm. 15. Borrow, fill or waste activity shall be conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because o slides, sinking, or collapse. 16. The developer shall reserve the right to install, maintain, remove or convert to permanent stormwater management facilities where applicable all erosion control measures required by this plan regardless of the sale of any lot, unit, building or other portion of the property. 17. Temporary stabilization shall be temporary seeding and mulching. Seeding is to be at 75 Ibs /acre, and in the months of September to February to consist a 5o /5o 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 8olbs /loosf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at golbs /l000sf, incorporated into the top 4 -6 inches of soil. Fertilizer shall be applied at l000lbs /acre and consist of a 10 -20 -10 nutrient mix. Permanent seeding shall be applied at 18olbs /acre and consist of 95% Kentucky 31 or Tall Fescue and o -5% Perennial Ryegrass or Kentucky Bluegrass. Straw mulch is to be applied at 8olbs /loosf. Alternatives are subject to approved bythe County erosion control inspector. 1g. 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 5o% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded when necessary to achieve a good stand of grass. Silt fence and diversion dykes which are collecting sediment to half their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 3o days of final site stabilization, when measures are no longer needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordinance section 17- 204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (g) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17- 207B) DESCRIPTION OF EROSION & ,S'EDIAMNT ` CONTROL MEASURES_ EROSION AND SEDIMENT CONTROL MEASURES: IT IS AN71CIPAIED THE USE OF A CONSTRUCTION ENTRANCE W77H A WASH RACK, AND SILT FENCING & A SEDIMENT 7RAP TO CON7ROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIA7ELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WiLL NOT BE REQUIRED SINCE THE PROJECT WJLL NOT GENERATE EXCESS MATERIAL. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH MLL NO LONGER BE EXCAVATED AND WHERE CONS7RUC77ON ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINA77NG VEGETA7ON IMMEDIA7ELY FOLLOWING GRADING OF THOSE AREAS. SELEC77ON OF SEED MIXTURE WILL DEPEND ON 7HE 77ME OF YEAR APPLIED. 3.02 CONS7RUC77ON ENTRANCE - ONE CONS7RUC77ON ENTRANCE IS PROPOSED AND IT SHALL BE INSTALLED AT THE EDGE OF 774E CURB & GUTTER ON BRIARWOOD DRIVE ENTERING 7HE SITE. 7HIS LOCA77ON MLL BE 7HE ONLY POINT OF INGRESS AND EGRESS TO THE SITE, UNLESS OTHERWISE AUTHORIZED BY 7HE COUNTY INSPECTOR. CARE SHALL BE TAKEN TO PROTECT ALL EXiS77NO ROADS & ALLEYS FROM TRANSFER OF SEDIMENT. 3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON 7HE DOWNSTREAM SIDE OF DISTURBANCE WHERE NOTED ON 7HE PLANS 3.13 TEMPORARY SEDIMENT TRAP- A TEMPORARY SEDIMENT 7RAP WILL BE INSTALLED AND MAINTAINED WHERE SHOWN ON THE PLANS 3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE SHOWN ON THE PLANS. 3.32 PERMANENT SEEDING- PERMANENT SEEDING SHALL BE APPLIED WHERE SHOWN ON 7HE PLANS 3.36 SOIL STABILIZA77ON BLANKETS AND MATTING- B/M SHALL BE EMPLOYED WHEREVER SHOWN ON 774E PLANS OR WHERE SLOPES EXCEED 3:1 SLOPE, 3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT 7HE S17E WHERE SHOWN ON THE PLANS STORMWATER MANAGEMENT.• STORMWA7ER RUNOFF WILL BE TREATED ON -SITE THROUGH THE USE OF A GRASS WA TER QUALITY SWALE AND RUNOFF WILL BE DETAINED ONSI TE THROUGH THE USE OF AN UNDERGROUND DETENTION SYSTEM. THIS PLAN ALSO ALLOWS FOR THE INSTALLATION OF FUTURE IMPERVIOUS AREAS WITH THE OVER DESIGN OF THE UNDERGROUND DETEN7ON SYSTEM AND THE FUTURE INSTALLA7ON OF FILTERRA INLET(s). THIS PLAN TAKES INTO ACCOUNT ALL PHASES OF DEVELOPMENT AND THOUGH THE FUTURE DEVELOPMENT IS DESIGNED & ACCOUNTED FOR WITH 77-IIS PLAN, THE FINAL DESIGN & INSTALLATION OF THE FILTERRA INLET(s) WILL OCCUR WITH A SEPARATE S17E PLAN. SEE THE STORMWATER MANAGEMENT PLAN WITH THIS SET FOR ADDITIONAL INFORMATION. MAINTENANCE. IN GENERAL, DURING CONS7RUC77ON 7HE RLD OR CONTRACTOR ON -S17E WILL CHECK ALL EROSION AND SEDIMENT CON7ROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM 774E RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS- a. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK. b.ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF 7HE GRAVEL iS CLOGGED BY SEDIMENT THE GRAVEL MLL BE REMOVED AND CLEANED, OR IT KILL BE REPLACED. c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOS177ON REACHED HALF WAY TO 7HE TOP OF THE BARRIER. d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED. IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE 7HE RLD OR CONTRACTOR ON -SITE. THE CONTRACTOR WILL BE DETERMINED AT THE TIME THE CONTRACT IS AWARDED. UPON COMPLE77ON OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE. SOIL DESCRIPTION 34D - Glenelg Loam- 15% to 259. slopes. This soil is well drained & typically has a moderately high to high Ksat value with a depth to water table more than 80 inches. The available water capacity for this soil is typically high. The surface layer is generally 0 -8 inches thick without a risk of frequent flooding and ponding. 36C - Hayesville Loam- 79. to 15% slopes. This soil is well drained & typically has a moderately high to high Ksat value with a depth to water table more than 80 inches. The available water capacity for this soil is typically high. The surface layer is generally 0 -7 inches thick without a risk of frequent flooding and ponding. Reference: web soil survey online database, found at Http: //websoilsurvey. Nres. Usda. Gov /app /websoilsurvey. Aspx EROSION CONTROL NOTES & NARRATIVE PURPOSE THE PURPOSE OF THIS LAND - DISTURBING AC77WTY IS TO FILL AN EXIS77NG SEDIMENT BASIN & INSTALL AN UNDERGROUND DE7EN7TON SYSTEM TO HANDLE 774E CURRENT AND FUTURE DEVELOPMENT. THIS PLAN ALSO PROPOSES THE INSTALLATION OF A GRASS WATER QUALITY SWALE AND 774E FUTURE INSTALLA7ON OF FILTERRA INLET(s). 7HE TOTAL ACREAGE TO BE DISTURBED IS 1.36 ACRES AND MINOR CLEARING IS PROPOSED. EXISTING SITE CONDITIONS. THE EXIS77NG S17E IS A VACANT HILLY PARCEL, SLOPING FROM NORTH TO SOUTH TO A TEMPORARY SEDIMENT BASIN. 7HE S17E 1S GENERALLY WELL DRAINED AND EROSION AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO 7HE EXiS77NG SITE SLOPE AND PROJECT 7HE DOWNSTREAM AND ADJACENT PROPERTIES ADJACENT AREAS: 7HE S17E IS BORDERED BY 7HE EXiS77NG BRIARWOOD DRIVE TO THE WEST, THE EXIS77NG ROUTE 29 TO 7HE SOU771 & IS BORDERED BY THE MASTER PLANED BRIARWOOD DEVELOPMENT TO THE EAST AND NORTH OFFSITE LAND DISTURBANCE.• THIS PROJECT PROPOSES NO OFFS17E DISTURBANCES OUTSIDE OF PUBLIC RIGHT -OF -WAY AND THE LIMITS OF THE PARCEL. ANY OFFSI7E PROPERTY USED FOR CUT DISPOSAL OR FILL ACQUIS177ON MUST HAVE AN APPROVED EROSION AND SEDIMENT CONTROL. PLAN. CRITICAL AREAS.• THERE ARE NO PROPOSED IMPACTS TO NATURAL CRITICAL SLOPES ON -SITE: SOILS.• THIS S17E CONSISTS OF TWO SOiL TYPES, 34D & 36C. SEE THIS SHEET FOR FURTHER DETAILS. SEQUENCE OF CONSTRUCTION: 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS7RUC7ION MEETING AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONS7RUC770N PROCESS WITHOUT THE APPROVAL FROM 7HE INSPECTOR ON 7HE PROJECT. J. INSTALL PAVED CONS7RUC770N ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. THE CONS7RUC77ON ENTRANCE SHALL BE INSTALLED WHERE CONS7RUC770N VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE 7RANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT 774E END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND 77?ANSPOR7ING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 4. CONTRACTOR SHALL INSTALL THE SEDIMENT TRAP, SILT FENCING AND TREE PR07EC77ON BEFORE ANY SITE DISTURBANCE SHALL TAKE PLACE. CONTRACTOR SHALL ALSO STAKE 7HE LIMITS OF DISTURBANCE ON -SITE IN177ALLY. CONS7RUC7701V OUTSIDE OF THE LiMiTS OF DISTURBANCE IS PROHIBITED. 5. INSTALL 774E REMAINING IN177AL CONSTRUC770N MEASURES AS SHOWN ON 7HE EROSION CONTROL PLAN SHEET. ALSO INSTALL A TEMPORARY WATER METER TO SUPPLY WATER TO THE WASH RACK AFTER CONTAC77NG ACSA IF AN AL 7ERNA TE WA TER SUPPL Y CANNOT BE FOUND. THE CONSTRUC77ON OF THIS TEMPORARY WATERLINE & METER SHOULD OCCUR IMMEDIATELY AFTER 774E CONS77?UC77ON OF THE CONS7RUC77ON ENTRANCE, AND PRIOR TO FILLING OF THE SEDIMENT BASIN. COORDINA77ON OF THIS TEMPORARY WATERLINE OR WATER SOURCE SHALL BE RESOLVED Wl7H THE COUNTY INSPECTOR & ACSA PRIOR TO INSTALLATION. MEASURES INTENDED TO 7RAP SEDIMENT SHALL BE CONSTRUCTED AS A FiRST STEP WITH ANY LAND DISTURBANCE AC77VITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 6. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUC77ON ENTRANCE IS INSTALLED, INSTALL ANY REMAINING EROSION CON7IROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN. Z ONCE ALL THE EROSION CONTROL I7EMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN AND 7HE INSPECTOR HAS APPROVED 7HE EROSION CONTROL MEASURES, 7HE CONTRACTOR CAN BEGIN GRADING OPERA TONS. 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE JS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WITHIN SEVEN DAYS ]TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZA77ON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. CONTRACTOR SHALL KEEP THE CONS7RUC77ON ENTRANCE w/ WASH RACK . OPERA77ONAL AS LONG AS POSSIBLE THE SILT FENCING SHALL ALSO REMAIN IN PLACE AS LONG AS POSSIBLE AND SHALL ONLY BE REMOVED UPON THE COUNTY INSPECTOR's APPROVAL. 9. INSTALL THE (UNDERGROUND DETEN7ON SYSTEM AND NETWORK OF STORM SEWER. 10. ONCE ALL PHASES OF CONS7RUC77ON ARE COMPLETE, THE S17E IS STABILIZED AND 774E INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE 7HE EROSION CONTROL MEASURES NO I7EM SHALL BE REMOVED UNLESS 7HE UPSTREAM AREAS ARE STABILIZED AND 774E INSPECTOR GIVES PERMISSION. 11. MAINTAIN ALL EROSION CON7ROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY 7HE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WI7H 7HE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 12 ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES. SHALL BE REMOVED 107HIN 30 DAYS AFTER FINAL S17E STABILiZA77ON OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. 7RAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMEN TA 770N. SCO R. COLLINSZ Lic. No. 035791 � „s, �(�(�6 �� rolvaL �ti� L9r C'7 M ItN d" i N 0 N N W J_ W L90 L1. Q 2 U Y W Ul H ZW W JF_ W J� Q a° 0 N U at 0 H W W 0 • • • `U Q 010-01 Q ,Z W V) LU 0 Z 0 Z 0 V Z W 2 0 UJ 06 Z 00A' Y l 0 UJ w J U w_ p w ce _ CL V7 JOB NO. 122076 SCALE N/A SHEET NO. 5 a) U) 0 D a T a L 0 m n o �z 0 0! sw w z az o w 4z a� • o o L U o- 0 0 o s W 3 0 m �0 0 U c U Q) CL 0 3 L (n 0 Q) Q 0 a +, E o a 3 0 (DD Z c a-, _y w a w) z U' Z o- w U V L z -�-• 0 w C: o 0 U U 0 0 T � i a N 0 O � O_ 7 � U O O U N 0 L U a ' O U +� N -0 a) E U •- O O -a C a� o V -O O > a •� C U a c _a > 0" o 0 0 a �C M 1.4 L Ln n H LU Z w w Q Z 0 � J E z �u- U) U z � UJ Zo o n U ® O J U � Z (a H ~ w ° Z U.) W�-, Z W U.�/ H ce W a- � o w W w ce W M M M _i M .-, r, r, L9r C'7 M ItN d" i N 0 N N W J_ W L90 L1. Q 2 U Y W Ul H ZW W JF_ W J� Q a° 0 N U at 0 H W W 0 • • • `U Q 010-01 Q ,Z W V) LU 0 Z 0 Z 0 V Z W 2 0 UJ 06 Z 00A' Y l 0 UJ w J U w_ p w ce _ CL V7 JOB NO. 122076 SCALE N/A SHEET NO. 5 a) U) 0 D a T a L 0 m n o �z 0 0! sw w z az o w 4z a� • o o L U o- 0 0 o s W 3 0 m �0 0 U c U Q) CL 0 3 L (n 0 Q) Q 0 a +, E o a 3 0 (DD Z c a-, _y w a w) z U' Z o- w U V L z -�-• 0 w C: o 0 U U 0 0 T � i a N 0 O � O_ 7 � U O O U N 0 L U a ' O U +� N -0 a) E U •- O O -a C a� o V -O O > a •� C U a c _a > 0" o 0 0 a �C PIPEDESIGN . __.._____.__ -._ _ - -_ _1 I _.._._.. _..,_.._.____.;___,.�.__.._____ i __.._._._ _.._ -_ •.__._____...._._.,_ __.._.....__,____..�__. i _._._____1._. __.__.._.- __..___.._.__._.- ....._.�___ ___.___._... (n = 0.013 for RCP In __ --------- ..._ ._.___......_.--- _..._.._._.._, = 0.01 for HOPE i ? 1 Adhesive e_ letion (ft ) area ( volume C o vol ume(cY) S. TR TR E } H drolo SLOPE INVERT i I INLET Curb i COMMENTS { Pi e ft % IN OUT TACKIFIED STRAW, IN ACCORDANCE TYPE Type Pipe SEEDING SCHEDULE EX37 7:1 Coarse Spray 450 Acrylic Emulsion H DI -31B CG-6 410.26 +/- Modifications to ex inlet 3 15 39.6 0.5% 406.34 406.14 HDPE or RCP3 z O o 2 24 47.2 0.5% 404.21 404.00 HDPE or RCP3 4 15 43.0 5.8% 408.50 406.00 HDPE or RCP3 g w E 0 a 0 U I O '' z 0 z P 2 EI to oij 0 �, i I a, ul fn C� COQ • 1 �t E1 31 « ..O-1 CI •� O -cj E # C m qq i i1� o� E OI o� •FE -..f 45 m w oc o3 a Q c� E I �i o > o{ E ci .14 U1 61 W cJi UJI O W Pipe run: Existing 37 - Underground Detention System EX37 DETENTION 0.38 0.55 0.209 0.209 12.00 5.00 1.04 OEM 406.34 406.14 40 0.01 0.0050 15 2.99 0.22 Pipe run: Underground Detention System- Existing 36B (Max. 10 -year routing) DETENTION OUT 1.74 0.65 1.131 1.131 5.00 6.67 1 4.89 404.21 404.00 1 47.2 0.01 0.0050 1 24 4.42 0.18 Pipe run: Existing 37 - Water Quality Swale (Bypass) EX37 SWALE 0.38 0.55 0.209 0.209 12.00 5.00 1.0 406.34 406.14 40 0.01 0.0050 15 2.99 0.22 DRAINAGE DESCRIPTIONS SPECIES RATE PIPE INFORMATION INLET INFORMATION ANNUAL RYEGRASS SEPT 1 -FEB 15 (LOLIUM MULTI- FLORUM)I 50 -100 Adhesive e_ letion (ft ) area ( volume C o vol ume(cY) S. TR TR DIA. LENGTH" SLOPE INVERT INVERT MATERIAL INLET Curb RIM* COMMENTS SEEDINGS MADE IN in. ft % IN OUT TACKIFIED STRAW, IN ACCORDANCE TYPE Type ELEVATION SEEDING SCHEDULE EX37 7:1 Coarse Spray 450 Acrylic Emulsion H DI -31B CG-6 410.26 +/- Modifications to ex inlet 3 15 39.6 0.5% 406.34 406.14 HDPE or RCP3 z O o 2 24 47.2 0.5% 404.21 404.00 HDPE or RCP3 4 15 43.0 5.8% 408.50 406.00 HDPE or RCP3 g w ATTACH FILTER FABA TO STAKES OR POS7 EXTEND IT INTO TREI EXCA VA TED BACKFILLED COMPACTED )EN STAKE POST TH = 5' MIN. SILT FENCE sF .(WI THOU T WIRE SrIPPOR T,) NO SCALE SH, SD TOTAL LBS GENERAL. SLOPE 0:1 OR LESS) PER ACRE 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 & P SEDIMENT CONTROL HANDBOOK, 3RD ED.) PLANTING DATES SPECIES RATE 122076 50/50 MIX OF (LBS /ACRE) ANNUAL RYEGRASS SEPT 1 -FEB 15 (LOLIUM MULTI- FLORUM)I 50 -100 Adhesive e_ letion (ft ) area ( volume C o vol ume(cY) CEREAL (WINTER) RYE 0 (SECALE CEREALE) FEB 16 -APR 20 ANNUAL RYEGRASS 60 -100 14.6 (LOLIUM MULTI- FLORUM)l 1,244 GERMAN MILLET MAY 1 -AUG 31 (SETARIA ITALICA) 50 SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED IMMEDIATELY UPON COMPLETION OF SEED APPLICATION WITH TACKIFIED STRAW, IN ACCORDANCE WITH VA E &S STD 3.35. TEMPORARY SEEDING SCHEDULE NO SCALE (STD. & SPEC. 3.31 OF VIRGINIA EROSION & US SEDIMENT CONTROL HANDBOOK, 3RD ED.) ON -SBAL" SLOPES, STRIPS MAY BE APPLIED ACROSS BERM �. mfr •�. 4.��1��.•�i�.i �Ir�.1�1••cv ?i �::�:. SLOPE. TOP OF • BRING THE MATERIAL OVER THE BERM AND ANCHOR If .ila:,!.�i• +• -_s: : BERM. Ilr� .1r��Ir1I�.1L •.,•___.- ':•... / AIL =.1L-- Cill= II- ,11 =11 111 IT ll- h PRING MATERIAL DOWN TO A LEVEL AREA BEFO)RE HE TURN T END SLOPE UNDER 4 AND STAPLE AT 12 INTERVALS. EROSION &SEDIMENT CONTROL PLAN: SCALE: 1 =30 SOIL TYPE , CONTRACTOR STAGING AREA SOIL B(�UNpARY _ CE -- - 446 INIMUM 12'xI0' RXI eP� A \LQ� ATON O4 ASH �ACK\ 444 / - - -- _ -- - , DISTURBANCE C T fi ON tafi v HALL PLUG & CONTRACTOR SHALL REMOVE \L\\ \ \ \ \ \ 1'�5ac. (TYP.)� / A AND�1Fi G OUTfALL PIPE & / IFL D Ft B S STORM SEWER & /� / �U TI'ABLEDFILL & WASTE MAHALSDIRECTING RUNOFF / t H N SE TMENT BASIN & S \ \ \ \ \ \ /�T E. NTION SYSTEM PER // FILL BASIN TO AN ELEVATION OF \ �\RASIN EAST�G S DD Et�T. \ `\ ` 6 - "' - APPROX. 41y' w/ POSITIVE DRAINAGE TO BE EMO ED / UCTION PLANS. - �� \ \ � \ \ SEDIMENT ` \ \ �SOIL`TYPE \ \ DARo 6 #ac. DURING INSTALLATION OF \� \\ ` \ \\ �\ 3 D ' \L 3 UNDERGROUND DETENTION SYSTEM, CONTRACTOR SHALL PLUG - - -- &REMOVE THE EXISTING RISER & - 111 BARRCL CONFtG- URATI -ON AS SHOWN -- - -- -- -- ON THE- CONSTR CTION PLLAN5 - - -- 0\-- o TP CHAIN LINK TREE PROTECTION - FENCE Y 446 - ST1 � E--- --.. -_.. � .� `---- .._._._..�, io' 'WIDE-STONE WEIR -- ST OUTFALL1NTO. - F ROADSIDE DfTCH ------ CONTRACTOR SHALL STA L A 3• DEEP EDIMFNT TRAP (ST1 } AT THE BASE OF TH �' -� `'^ - E - -- - -- - -` SLOPE (APPROX. 90`Lx W A HE BOTT M). .HE ST 5,HA�STALLED PRIOR TO - - -- SF--w/WIRE -w/ WH2E _ E `-'--- - LAND DISTURBANCE TH INGtflid:RG-OPERAT NS. HE STs DA= 0.15ac. s•\- - - -- - -� CKfff � \� \� �V V ~�� INITIALLY WHEN -TH ST CTIONAL THE ST HAS AN INTERMEDIATE - 1 R -FL A= 0.63ac. HEN B is FILLED. THE ST's FINAL INFLOW WHEN `- E UNDERGROUND DETENTIO S FUNCTIONAL IS 3.940fs FOR THE 25yr. EVENT. THE ST IS DESIGNED VE A CAPACITY O 5.2cy. - RTE. 29f)(�- P 2CEL SA I F LO4LfOTHE DIRECTION FW. O NG EAEA� N THE T OF I D JOINING CHECK SLOTS CENR THE n1TMJ IF AT ALL POSSIBLE ON S� SLOPES APPLY PROTE�E COVC-#ING PARALLEL TO THE DIRECTION OF FLOW AND ANCHOR SECURELY. • -I B/M SOIL -STABILIZA LION BLANKET NOTE. TREA TMENT 1 SOIL STABILIZATION MATTING MATERIAL SHALL BE NO SCALE INSTALLED AS REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR Sediment Trap design #1 Water 122076 drainage area (acres) ( <3) 0.63 trap volumes: Rate Adhesive e_ letion (ft ) area ( volume C o vol ume(cY) 401 202 0 0.0 402 628 395 14.6 403 1090 1,244 46.1 -- 404 1578 2,570 95.2 1. SET POSTS AND EXCAVATE A 4"X4" TRENCH UPSLOPE ALONG THE LINE OF POSTS 4 hIIIE1IP FLOW -11 =1 I I -1 11 4 Y �Cfbpll D 7C1 Ad- 3" S A 2A, ASPHALG. -rqP COI�RS� ;ST 07 � JS�IhjG ., VMENT; U SCOT R. COLLINSZ U Lie. No. 035791,x• o xlss jDNAL E�O� A- iititiimiuu eater tO, of 1: aclrttuisk'bo.u�s #ialled:rovtl>i a iit�atntun l: >utcl>< 1�lt+coek P VI+1 Rift C4 C TARLF. 3.394 ADHFSWF.S USF.D FOR DUST CONTROL 2. 'STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. SIL T FENCE & (WI TH WIRE SUPPORT) .05-2 NO SCALE Water 122076 Application Dilution Type of Rate Adhesive ( iye: Water) Nozzle GallonslAere c ° Anionic Asphalt Emulsion 7:1 Coarse Spray 1,200 Latex Emubdon 12.5:1 Fine Spray 235 Rrain in Water 4:1 Fine Spray 300 Acrylic Emulsion (Non- Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion H d (Traffic) 3.5:1 Coarse Spray 350 Source: Va. DSWC Z Uj w 2. 'STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCA VA TED SOIL. SIL T FENCE & (WI TH WIRE SUPPORT) .05-2 NO SCALE ,L M M z z N J M a" d. CL ,J 0 a LL z C a N O T CD W ° N H ® o N V > W ~ z W -Wi LOU 5 .c J N Q ® v ° W L W 0 ° a L �^^ z 0 O z � O o O s O ° v v (D O 0 � a ry W 06 W 0 V) ° zT Ul Z O ° ° z W in ...i w w NN 0 v z Ce ._.I z w J O J W 0 0� 0- Q W o ca C) O " X 0 0 J ° w E Q (_ °° JOB NO. 122076 M M M M AS SHOWN M c ° to O � c h n h H d Z Uj w z O o E < 0 z U g w 0 a 0 U F=- O '' z 0 z N a 0 z a W w oc M � w W UJI ,L M M z z N J M a" d. CL ,J 0 a LL z C a N O T CD W ° N H ® o N V > W ~ z W -Wi LOU 5 .c J N Q ® v ° W L W 0 ° a L �^^ z 0 O z � O o O s O ° v v (D O 0 � a ry W 06 W 0 V) ° zT Ul Z O ° ° z W in ...i w w NN 0 v z Ce ._.I z w J O J W 0 0� 0- Q W o ca C) O " X 0 0 J ° w E Q (_ °° JOB NO. 122076 M w M M AS SHOWN M c ° O � c h n ,L M M z z N J M a" d. CL ,J 0 a LL z C a N O T CD W ° N H ® o N V > W ~ z W -Wi LOU 5 .c J N Q ® v ° W L W 0 ° a L �^^ z 0 O z � O o O s O ° v v (D O 0 � a ry W 06 W 0 V) ° zT Ul Z O ° ° z W in ...i w w NN 0 v z Ce ._.I z w J O J W 0 0� 0- Q W o ca C) O " X 0 0 J ° w E Q (_ °° JOB NO. 122076 a in SCALE ° AS SHOWN v ° c ° SHEET NO. IQ z w w z z w V) z J O v 0 c 0 V 3 L a X Jr- a� 0 0 3 rn c ° W c 0 V c 0 V O c ° 0 U ° m c 0 U O a a) a c D ai U a� 0 0