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HomeMy WebLinkAboutWPO201700058 Plan - VSMP WPO VSMP 2018-01-31LEGEND EXIST NEW DESCRIPTION €�"FC x 125 TC TOP OF CURB ELEVATION 1.; x 125 SPOT ELEVATION Quarterly o o from overflow structures. x 125 TW TOP OF WALL ELEVATION '>•. x 125 BW BOTTOM OF WALL ELEVATION in depth. Standing water observed in the well after three days is a clear Semi-annual BENCHMARK inspection + Remove trees that start to grow in the vicinit of the infiltration facility. STORM SEWER ei a b l � RD ROOF DRAIN _ww3 to SEWER LINE WATER LINE _....• _ __.__ GAS GAS LINE mm-_-- rMF.--- - aD£ OVERHEAD ELECTRIC WIRE UIVE _.__...._...,. - ucE UNDERGROUND ELECTRIC _. T --- GHT - OVERHEAD TELEPHONE LINE NOTE: UGT UNDERGROUND TELEPHONE LINE 1. THE SIZE OF THE SYMBOLS DRAIN INLET (DI) © STORM/SANITARY MANHOLE C PLUG Q °°" ® WATER VALVE & BOX alt. FIRE HYDRANT � WATER METER i-•� LIGHT POLE - UTILITY POLE PROPERTY UNE - - - ADJACENT PROPERTY LINE VACATED PROPERTY LINE BUILDING SETBACK X PARKING SETBACK __..._..._...._. __..... ----- SANITARY EASEMENT GRADING EASEMENT ___._.._..._____ .... DRAINAGE EASEMENT _._._........._._ UTILITY EASEMENT WATER EASEMENT ACCESS EASEMENT STORM DRAINAGE EASEMENT TREE UNE ..... _.._ FENCE STREAM 31: 12 ---- INTERVAL CONTOUR �-- oo----- INDEX CONTOUR G ---2GG-2 STANDARD 6" CURB CG -_6 CG -6 COMBINATION 6" CURB & GUTTER V5MF FLAN FOR WFO 2017-00058 WHITE HALL DISTRICT, ALt5EMARLE COUNTY, VIRGINIA U 1 lf" I M I TY MAP cr* m v. -i■w--oi nnno IMAGE PROVIDED BY GOOGLE MAPS CI - C2 - C3 - G4 - 05 - C6 - C7 - C8 - C9 - CIO - CI I - C12 - C13 - C14 - C15 - C16 - C 17 - C 18 - SHEET INDEX COVER SHEET EXISTING CONDITIONS SUBDIVISION OVERVIEW GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN EROSION CONTROL NARRATIVE SSCP STAGE I -MASS GRADING SSCP STAGE 11 -BMP INSTALLATION MITIGATION PLAN PERMANENT SWM PLAN EROSION CONTROL DETAILS ER0510N CONTROL DETAILS STORM SEWED PROFILES 151"V'IP B PLAN DETENTION PROFILES DETENTION * STORM 5 EWF Z I' RO ff I LE5 OWNER I DEVELOPER OWNER (PARCELS 26A2 AND 108A HERRING, JUDITH S. 5444 BROWNSVILLE ROAD CHARLOTTESVILLE VA, 22903 DB 1479 PG 180 DB 666 PG 109 DEVELOPER/ CONTRACT PURCHASER: ADELAIDE C-VILLE, LLC 250 W. MAIN STREET, SUITE 201 CHARLOTTESVILLE, VA 22902 SOURCE OF BOUNDARY & TOPO SOURCE OF BOUNDARY SURVEY: N BOUNDARY SURVEY BY ROGER RAY AND ASSOCIATES. ADDITIONAL BOUNDARY INFORMATION PROVIDED BY LINCOLN SURVEYING. BOUNDARY SURVEY COMPLETED APRIL 4, 2017 SOURCE OF TOPOGRAPHY: V CONTOURS PROVIDED BY MRG, INC. ARIAL SURVEY COMPLETED MARCH( 17, 2016 TOPOGRAPHIC SURVEY COMPLETED JAN. 3, 2017 BENCHMARK(S): NAVD88 NAD83 VIRGINIA STATE PLANE SOUTH FLOOD ZONE According to the FEMA Flood Insurance Rate Map, effective date February 4, 2005 (Community Panel 51003CO237D), this property does not lie within the Zone AE 100 -year flood plain. STEEP SLOPES All Onsite Managed and Preserved Slopes are shown. U�r J A SH1M WATERSHED L* . 5183 Lickin hole Creek Watershed Supplyw g LAND USE SCHEDULE ass/oNAL �11 AREA OF DEVELOPMENT 35.00 AC LIMITS OF DISTURBANCE 14.92 AC TOTAL OPEN SPACE REQUIRED: 8.75 AC DEVELOPMENT LOTS ................ 14.75 Ac DEDICATED R.O.W .................... 1.66 Ac OPEN SPACE ........................... 18.59 Ac TOTAL PARCEL AREA ............... 35.00 Ac TOTAL IMPERVIOUS AREA.......... 4.55 Ac r,�*��i.��Esi �.y4,r�" , i,rx,e ?S,mt „+?,✓�;: ,�..�:. ;�,, - sd:s�x���4�tJ 1�.�„n„tf$F,ttx, ,kiR' �d a�S3,��?x,_ r. ,�, ,, ,r, y,�'�;, • Replace pea gravel/topsoil and top surface filter fabric when clogged). vmw • Ensure that the contributing drainage area, inlets, and facility surface are CONCRETE PAVEMENT f SIDEWALK clear of debris. RIPRAP Quarterly o o from overflow structures. y ASPHALT F 7% GRASS in depth. Standing water observed in the well after three days is a clear Semi-annual EC -2 MATTING inspection + Remove trees that start to grow in the vicinit of the infiltration facility. EC -3 MATTING ei a b l � Annually WETLAND fo to PARKING COUNT CROSSWALK HANDICAP ACCESSIBLE AISLE {`. /FN CG -12 HANDICAP PARKING NOTE: 1. THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT IS SHOWN. V5MF FLAN FOR WFO 2017-00058 WHITE HALL DISTRICT, ALt5EMARLE COUNTY, VIRGINIA U 1 lf" I M I TY MAP cr* m v. -i■w--oi nnno IMAGE PROVIDED BY GOOGLE MAPS CI - C2 - C3 - G4 - 05 - C6 - C7 - C8 - C9 - CIO - CI I - C12 - C13 - C14 - C15 - C16 - C 17 - C 18 - SHEET INDEX COVER SHEET EXISTING CONDITIONS SUBDIVISION OVERVIEW GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN GRADING AND UTILITY PLAN EROSION CONTROL NARRATIVE SSCP STAGE I -MASS GRADING SSCP STAGE 11 -BMP INSTALLATION MITIGATION PLAN PERMANENT SWM PLAN EROSION CONTROL DETAILS ER0510N CONTROL DETAILS STORM SEWED PROFILES 151"V'IP B PLAN DETENTION PROFILES DETENTION * STORM 5 EWF Z I' RO ff I LE5 OWNER I DEVELOPER OWNER (PARCELS 26A2 AND 108A HERRING, JUDITH S. 5444 BROWNSVILLE ROAD CHARLOTTESVILLE VA, 22903 DB 1479 PG 180 DB 666 PG 109 DEVELOPER/ CONTRACT PURCHASER: ADELAIDE C-VILLE, LLC 250 W. MAIN STREET, SUITE 201 CHARLOTTESVILLE, VA 22902 SOURCE OF BOUNDARY & TOPO SOURCE OF BOUNDARY SURVEY: N BOUNDARY SURVEY BY ROGER RAY AND ASSOCIATES. ADDITIONAL BOUNDARY INFORMATION PROVIDED BY LINCOLN SURVEYING. BOUNDARY SURVEY COMPLETED APRIL 4, 2017 SOURCE OF TOPOGRAPHY: V CONTOURS PROVIDED BY MRG, INC. ARIAL SURVEY COMPLETED MARCH( 17, 2016 TOPOGRAPHIC SURVEY COMPLETED JAN. 3, 2017 BENCHMARK(S): NAVD88 NAD83 VIRGINIA STATE PLANE SOUTH FLOOD ZONE According to the FEMA Flood Insurance Rate Map, effective date February 4, 2005 (Community Panel 51003CO237D), this property does not lie within the Zone AE 100 -year flood plain. STEEP SLOPES All Onsite Managed and Preserved Slopes are shown. U�r J A SH1M WATERSHED L* . 5183 Lickin hole Creek Watershed Supplyw g LAND USE SCHEDULE ass/oNAL �11 AREA OF DEVELOPMENT 35.00 AC LIMITS OF DISTURBANCE 14.92 AC TOTAL OPEN SPACE REQUIRED: 8.75 AC DEVELOPMENT LOTS ................ 14.75 Ac DEDICATED R.O.W .................... 1.66 Ac OPEN SPACE ........................... 18.59 Ac TOTAL PARCEL AREA ............... 35.00 Ac TOTAL IMPERVIOUS AREA.......... 4.55 Ac r,�*��i.��Esi �.y4,r�" , i,rx,e ?S,mt „+?,✓�;: ,�..�:. ;�,, - sd:s�x���4�tJ 1�.�„n„tf$F,ttx, ,kiR' �d a�S3,��?x,_ r. ,�, ,, ,r, y,�'�;, • Sparrow Hill HOA shall maintain all onsite BMP`s. BMP•s require confined space certification for entry. GENERAL CONSTRUCTION NOTES FOR OE'ROSION AND SEDIMENT CONTROL PLANS 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will) be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regullations VR 625-02-00 Erosion and Sediment Control Regulations, 3. All erosion and sediment control measures arfe to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion and sediment. control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off-site borrow or waste areas), the contractor shall submit a supplementary erosiion 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 puimped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13-30i of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm. 15. Borrow, fill or waste activity shall be conducted in a safe manner that maintains lateral support, or order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because 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 lbs/acre, and in the months of September to February to consist a 50/50 mix of Annual Ryegrass and Cereal Winter Ryle, 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. 18. 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 1000ibs/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. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repaired immediately. Silt traps are to be cleaned when 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 whichl 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 30 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 call denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17-207B) GENERAL CONSTRUCTION NOTES a/13,11T ,w'00e17 -"-)6e-s1? 1. Prior to any construction within any existing public right-of-way, including connection to any existing road, a permit shall be obtained from the Virginia Department of Transportation (VDOT). This plan as drawn many not accurately reflect the requirements of the permit. Where any discrepancies occur the requirements of the permit shall govern. 2. All materials and construction methods shall (conform to current specifications and standards of VDOT unless otherwise noted. 3. Erosion and siltation control measures shall bye provided in accordance with the approved erosion control plan and shall be installed prior to any clearing, grading or other construction. 4. All slopes and disturbed areas ore to be fertillized, seeded and mulched. 5. The maximum allowable slope is 2:1 (horizon tial: vertical). Where reasonably obtainable, lesser slopes of 3:1 or better are to be achieved. 6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the County Engineer, or designee, it is deemed necessary in order to stabilize a drainage channel, 7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic Control Devices. 8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe - Class ill. 9. All excavation for underground pipe installation must comply with OSHA Standards for the Construction Industry (29 CFR Part 1926). Replace pea gravel/topsoil and top surface filter fabric when clogged). As needed • Ensure that the contributing drainage area, inlets, and facility surface are clear of debris. • Ensure that the contributing drainage area is stabilized. Quarterly • Remove sediment and oil/g.-ease from pre-treatment devices, as well as from overflow structures. • Repair undercut and eroded areas at inflow and outflow structures. • Check observation wells 3 days after a storm event in excess of 1/2 inch in depth. Standing water observed in the well after three days is a clear Semi-annual indication of clogging. inspection + Remove trees that start to grow in the vicinit of the infiltration facility. + Clean Out accumulated sediments & debris from the infiltration facility. Annually Sparrow Hill HOA shall maintain all onsite BMP`s. BMP•s require confined space certification for entry. GENERAL CONSTRUCTION NOTES FOR OE'ROSION AND SEDIMENT CONTROL PLANS 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement of land disturbing activity, and one week prior to the final inspection. 2. All erosion and sediment control measures will) be constructed and maintained according to minimum standards and specifications of the Virginia Erosion and Sediment Control Handbook and Virginia Regullations VR 625-02-00 Erosion and Sediment Control Regulations, 3. All erosion and sediment control measures arfe to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion and sediment. control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off-site borrow or waste areas), the contractor shall submit a supplementary erosiion 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 puimped into an approved filtering device. 9. The contractor shall inspect all erosion control measures periodically and after each runoff producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken to an approved waste area. Earth fill shall be inert materials only, free of roots, stumps, wood, rubbish, and other debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13-30i of the Code of Albemarle. 14. Borrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm. 15. Borrow, fill or waste activity shall be conducted in a safe manner that maintains lateral support, or order to minimize any hazard to persons, physical damage to adjacent land and improvements, and damage to any public street because 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 lbs/acre, and in the months of September to February to consist a 50/50 mix of Annual Ryegrass and Cereal Winter Ryle, 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. 18. 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 1000ibs/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. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repaired immediately. Silt traps are to be cleaned when 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 whichl 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 30 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 call denuded areas within nine (9) months after the date the land disturbing activity commenced. (Water Protection Ordinance section 17-207B) GENERAL CONSTRUCTION NOTES a/13,11T ,w'00e17 -"-)6e-s1? 1. Prior to any construction within any existing public right-of-way, including connection to any existing road, a permit shall be obtained from the Virginia Department of Transportation (VDOT). This plan as drawn many not accurately reflect the requirements of the permit. Where any discrepancies occur the requirements of the permit shall govern. 2. All materials and construction methods shall (conform to current specifications and standards of VDOT unless otherwise noted. 3. Erosion and siltation control measures shall bye provided in accordance with the approved erosion control plan and shall be installed prior to any clearing, grading or other construction. 4. All slopes and disturbed areas ore to be fertillized, seeded and mulched. 5. The maximum allowable slope is 2:1 (horizon tial: vertical). Where reasonably obtainable, lesser slopes of 3:1 or better are to be achieved. 6. Paved, rip -rap or stabilization mat lined ditch may be required when in the opinion of the County Engineer, or designee, it is deemed necessary in order to stabilize a drainage channel, 7. All traffic control signs shall conform with the Virginia Manual for Uniform Traffic Control Devices. 8. Unless otherwise noted all concrete pipe shall be reinforced concrete pipe - Class ill. 9. All excavation for underground pipe installation must comply with OSHA Standards for the Construction Industry (29 CFR Part 1926). I - F 'LOT 48 f / -:7 / / I, I I \ I iil / / / T.M. 56F-1-49 0.36 AC. D.B. 3636-164 I If X669.6 DONALD P. GILLAND N, "N, fill , I _ _= --- - - -) f 'r K 1 1 f I It __j I I D.B. 1597-210 THRU 219 N. c) I YRIM itll- I I If') PLAT 72 ZONING: R4 LOT 52 2 Yel"Sll / ,, 1,\ 4�, SINGLE FAMILY RESIDENCE .... ... . ...... , x it -j j -:'Li —iE�1_:; A_L, S- f A/l/ 0 T 49 jj� "VZVAU, yilJ, 44Pl 4"t _j E/ 1-7-1/1 7 V K A "V x 672.3 553,6 k\\\\, Jr ,,,7-)' / X� eLl" It , J, 7RMjWg I \\ \ \ \ , I " I& If > (MK) 7 17 �l 6, 'r VY -4 -2, IN i 6 J IV LOT 51 NN I Ih -_a f Lj I W I /, / / / , , - i-Z',l_I LOT 50 / I I I /� � I`/ � , - - - - -- � I IT'I "+I "I IN X \ I, I I M1, I 11-111 JA Ono, 613.3 6x7 3. 4 66 "'A V, x \q/ M Q I L4 T Q/ IT I 'Ail jk i C -n I I IT, I M:71, N I VIA, it I'N y i158A I-- k -�o 1 01 WIR 1 3 6 B 0 1, 6 N, N, I I X HSG 8 x72.� 1 1j) NIVO d 0 /P r eserved q/\ 672. 6)1.4 Slopes x, .3 'NN COMMON AREA x673,4 x671.4 RI 1". \ N \ \ \ 11 672 if i 41 THE CORY FARM v DECK 0 'I I Ln (TUR) \,-A rz// N A Is, I I N. ,�/ /\ I \#,\ \ \\\ (-I\ 659.1 VAUET7 f 672 VA -l\ � I -x \"N\ 61, \_-I-I\ 6703 it' 1 -11 Ili I. \A V, if, lit x Nfth. T t ltIk\1 I� 671.6 1 � 1, 1, 1, 1 1 1 co I " I ,;� I I I t 1 110, 1 \ -_ -_ , , I I I All N, it I I \ I \7 S x if W-1 IN- j I � \ I- I it N\ rZ/ J Iij ­_� _� � ;, �, I I,. , I, \ \ 1 1 61, 'V i� \ I 0 l\ M1 VIM, -N, Y\A W� N 0 UP I ITN �� - (7BR) 669.3 w I lififi\ TT I I I Z 0 / / — x bb/A x I lit 4, I ­,//p -1 ­ _� -II 1 7 x I i j W\W k \ "' \-- ` - I , I 'k r 4i'v N, A 411111 If �I N If k 67 ij IN 19. 1 MWIE, �J; ,A N, t o IN BUILDING Al \\' I, \\\ \1 , \ it a fill' I" < T.M. 561�C2 if rl k IN/ y4 if \I IN, 4.12 ELEIJ� A V JEANNE TAYLOW RAMS LEC. VAULT VAULTS W.B. 155 9 0 mip, 01 D.B. 1566 30 NE I ) / f A lit N'X �- \ \ , D.8, 1679-69 f& 696 660.5 PLAT A ZONING: 1 IVACANT R AL LAND IREbJAE ��E R) t658.5 0.9 581, 6 �4, _x flNCE\ 6-58.5 \> IPreserved' �,Iopes IIT�E"E S GN IIl3t7.5 tN, 664.5 f//7B �65.3 6577 1657 t3,7/ -SHED 6so lit I if -od . ....... lit I% lilt 651' f 1 66 qb OU# \x I low) SHED tIJill tf1ilk 659.7 It lit it 655.3 5�5.4 x it, if tIIfit I IIIf vo��I tjj I x 659.5 5�7126A,2 IAO� JUDIr S. IHERRIN`G V� )5963 11�43A-649) 100 1479 & 83\ PLAT\ T.M. 56-�"-Cll ZPNING: 'R1) Y/ SIINGLE'lFAMILY 2 47 Z Iqll I, ')I, ', I - __ ROBERT A. RA4$AY & lit RESIDENCE M$AY KATHY L. RA D.B. 1679-688,695 696 _QI V 49-.56 ACRES' ZONING: R1 SINGLE FAMILY RESIDENCE --6 W. 143 -6 `D -f3-.--66 -109-0 1 -PLAT WO -:-1 36 t�.' 40 9 P r AMUL-1 IlZONING.- RT -RESIDtka ttManaged r it �Slopes N 0 TE: Preserved Slopes are shown per Field—surveyed topography. This 1\ INN \\k Preserved—//* topography was surveyed with -35C 625- Slopes T. M. 56 contour and more precise 3.07 AC. outside STEVEN M. RAMSAY & Parcel than the Albemarle County GIS topo. .4 CYNTHIA H. RAMSAY As such, preserved slopes shown here D.P. 1679-688,695 & 696 PLAT represent the applicable zoning overlay. ZONING: R1 CA TIAL LAND x VA NT RESIDEN 604.4 6'0 5.2 Managed 620.8,,- ---Slopes C -ST 619.4 #COS- U ...... . ....... ST 0) N �1 7� SOIL TYPE BOUNDARY (Aa 665 SIGN OVERLAND FLOW DIRECTION 4' '918 7 ` " / 1 /11 / I 1b 1P (V y- cb' '41 oll % 6j \0 Preserved Z Slopes ......... . ............... .. ........ ..... . ........ .. .. .. .. ........... . ... outside Parcel /A T.M -35B I fill \I It lit, C _r s, N, 56 v 6.82 AC. 50 0 50 100 151 01 JEANNE TAYLOR RAMSAY aw, 11 "/ , 0) " I / I, I N W.B. 155-49 �jl 1--,/ 1 ? it Scale: 1"=50' -320 & 321 PLAT D.B. 1898 D.B. 1566-730 x D.B. 1679-695 & 696 7- T M. SHTMP > c N 14 183 c% 1 ift _C13''SIONAL 1 N, N, 1519 J0 j Cot J 584.gf A X I /_4 x < I - F 'LOT 48 f / -:7 / / I, I I \ I iil / / / T.M. 56F-1-49 0.36 AC. D.B. 3636-164 I If X669.6 DONALD P. GILLAND N, "N, fill , I _ _= --- - - -) f 'r K 1 1 f I It __j I I D.B. 1597-210 THRU 219 N. c) I YRIM itll- I I If') PLAT 72 ZONING: R4 LOT 52 2 Yel"Sll / ,, 1,\ 4�, SINGLE FAMILY RESIDENCE .... ... . ...... , x it -j j -:'Li —iE�1_:; A_L, S- f A/l/ 0 T 49 jj� "VZVAU, yilJ, 44Pl 4"t _j E/ 1-7-1/1 7 V K A "V x 672.3 553,6 k\\\\, Jr ,,,7-)' / X� eLl" It , J, 7RMjWg I \\ \ \ \ , I " I& If > (MK) 7 17 �l 6, 'r VY -4 -2, IN i 6 J IV LOT 51 NN I Ih -_a f Lj I W I /, / / / , , - i-Z',l_I LOT 50 / I I I /� � I`/ � , - - - - -- � I IT'I "+I "I IN X \ I, I I M1, I 11-111 JA Ono, 613.3 6x7 3. 4 66 "'A V, x \q/ M Q I L4 T Q/ IT I 'Ail jk i C -n I I IT, I M:71, N I VIA, it I'N y i158A I-- k -�o 1 01 WIR 1 3 6 B 0 1, 6 N, N, I I X HSG 8 x72.� 1 1j) NIVO d 0 /P r eserved q/\ 672. 6)1.4 Slopes x, .3 'NN COMMON AREA x673,4 x671.4 RI 1". \ N \ \ \ 11 672 if i 41 THE CORY FARM v DECK 0 'I I Ln (TUR) \,-A rz// N A Is, I I N. ,�/ /\ I \#,\ \ \\\ (-I\ 659.1 VAUET7 f 672 VA -l\ � I -x \"N\ 61, \_-I-I\ 6703 it' 1 -11 Ili I. \A V, if, lit x Nfth. T t ltIk\1 I� 671.6 1 � 1, 1, 1, 1 1 1 co I " I ,;� I I I t 1 110, 1 \ -_ -_ , , I I I All N, it I I \ I \7 S x if W-1 IN- j I � \ I- I it N\ rZ/ J Iij ­_� _� � ;, �, I I,. , I, \ \ 1 1 61, 'V i� \ I 0 l\ M1 VIM, -N, Y\A W� N 0 UP I ITN �� - (7BR) 669.3 w I lififi\ TT I I I Z 0 / / — x bb/A x I lit 4, I ­,//p -1 ­ _� -II 1 7 x I i j W\W k \ "' \-- ` - I , I 'k r 4i'v N, A 411111 If �I N If k 67 ij IN 19. 1 MWIE, �J; ,A N, t o IN BUILDING Al \\' I, \\\ \1 , \ it a fill' I" < T.M. 561�C2 if rl k IN/ y4 if \I IN, 4.12 ELEIJ� A V JEANNE TAYLOW RAMS LEC. VAULT VAULTS W.B. 155 9 0 mip, 01 D.B. 1566 30 NE I ) / f A lit N'X �- \ \ , D.8, 1679-69 f& 696 660.5 PLAT A ZONING: 1 IVACANT R AL LAND IREbJAE ��E R) t658.5 0.9 581, 6 �4, _x flNCE\ 6-58.5 \> IPreserved' �,Iopes IIT�E"E S GN IIl3t7.5 tN, 664.5 f//7B �65.3 6577 1657 t3,7/ -SHED 6so lit I if -od . ....... lit I% lilt 651' f 1 66 qb OU# \x I low) SHED tIJill tf1ilk 659.7 It lit it 655.3 5�5.4 x it, if tIIfit I IIIf vo��I tjj I x 659.5 5�7126A,2 IAO� JUDIr S. IHERRIN`G V� )5963 11�43A-649) 100 1479 & 83\ PLAT\ T.M. 56-�"-Cll ZPNING: 'R1) Y/ SIINGLE'lFAMILY 2 47 Z Iqll I, ')I, ', I - __ ROBERT A. RA4$AY & lit RESIDENCE M$AY KATHY L. RA D.B. 1679-688,695 696 _QI V 49-.56 ACRES' ZONING: R1 SINGLE FAMILY RESIDENCE --6 W. 143 -6 `D -f3-.--66 -109-0 1 -PLAT WO -:-1 36 t�.' 40 9 P r AMUL-1 IlZONING.- RT -RESIDtka ttManaged r it �Slopes N 0 TE: Preserved Slopes are shown per Field—surveyed topography. This 1\ INN \\k Preserved—//* topography was surveyed with -35C 625- Slopes T. M. 56 contour and more precise 3.07 AC. outside STEVEN M. RAMSAY & Parcel than the Albemarle County GIS topo. .4 CYNTHIA H. RAMSAY As such, preserved slopes shown here D.P. 1679-688,695 & 696 PLAT represent the applicable zoning overlay. ZONING: R1 CA TIAL LAND x VA NT RESIDEN 604.4 6'0 5.2 Managed 620.8,,- ---Slopes C -ST 619.4 #COS- U ...... . ....... ST 0) N �1 7� SOIL TYPE BOUNDARY (Aa 665 SIGN OVERLAND FLOW DIRECTION 4' '918 7 ` " / 1 /11 / I 1b 1P (V y- cb' '41 oll % 6j \0 Preserved Z Slopes ......... . ............... .. ........ ..... . ........ .. .. .. .. ........... . ... outside Parcel /A T.M -35B I fill \I It lit, C _r s, N, 56 v 6.82 AC. 50 0 50 100 151 01 JEANNE TAYLOR RAMSAY aw, 11 "/ , 0) " I / I, I N W.B. 155-49 �jl 1--,/ 1 ? it Scale: 1"=50' -320 & 321 PLAT D.B. 1898 D.B. 1566-730 x D.B. 1679-695 & 696 7- T M. 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'---, '� , ....... - , 3 �,,���9'r�,����,T�'���,,��"'"''�"'�;�;,��,��,���, - ' -1--l'. ��_ I -.I!.- - - i�,`;U�: �,`,'IiRi - I - I - cal V,=20' / - _1_7 31 , �� . \ v C6 OF 21 � � \\- \­ - " \\ � , '/ // % . - �`,',�,� �:,` I � ) \ 5 1�� MI. � � I I / / 0. '4, ­_ i --- � ��ml I -N, -E m iiffi l�_� �M W4 /I , I .H-,.;" ��-� , m F, . I I r, I � 11 � _ ­­­ ___ -,--- _____ - I File No. I �-*J� .. . -- _1.��..;;-­, ....... 1. , _� I I ,-Q I -*-*-,-,-*-*-*-*-* \ I i __ __�j / / / -<, \ )­­­ ----- -- ______,_,� * - IN ---I---- / � 15.055 __\ \ - / � FACILTIY ESMT � �: I , - �v - NEW 39' PUBLIC , � I � In ul i � I , - f'`,�', ,��,_��8i , , 1 %�R� -11 -t .. , , �"\!. �rj N z 1� � \W,4 of, '>40,_,__ Fw� lkj, - M, w 4, .. , W, � � I � Z, "; , , , 11 - II&I I / /,mm Ilk, n T x G1 � - - r "i, r11111 I I I , , I �1,,,x, \ � 71 7 � I - -� -- \ / M/--. _ () - ..... . 7 ­ � /', I , � I R I I I (- � � . ­_.� .......... 4 -------- i----- ...... I ------- 71 WM " , , " " - / ___\ , \ ) �- � - - - 7, "' ­ -c E 45 S "-c I 0� , I ­ " \ ­ - \ \ -i / / � � , � R', ( � � " � \ \ , , , - " , KA 4A, � I I I I I / I(I'l I ___ I ! PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION PROJECT DESCRIPTION THIS SITE IS A WOODED LOT OFF ROUTE 250 IN ALBEMARLE COUNTY BEING DEVELOPED INTO A SINGLE-FAMILY SUBDIVISION. THE TOTAL AREA OF DISTURBANCE IS 14.92 ACRES. THE PROJECT INVOLVES THE FOLLOWING WORK ACTIVITIES: 1. THE CONTRACTOR SHALL OBTAIN ALL LOCAL AND STATE EROSION AND SEDIMENT PERMITTING REQUIREMENTS AND MAINTAIN ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS, 2. INSTALLATION OF PERMANENT EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON THE PLAN AND DETAILS. 3. GRADING AND PLACEMENT OF FILL SHALL BE IN GENERAL ACCORDANCE WITH THE PLAN, 4, ESTABLISHMENT OF PERMANENT STABILIZATION OF ALL DISTURBED AREAS. EXISTING SITE CONDITIONS THE SITE IS A DEVELOPED SINGLE FAMILY LOT WITH FOREST AND TURF ZONED R-2. ADJACENT PROPERTIES THIS PROPERTY IS BORDERED TO THE EAST AND WEST BY SMALL SUBDIVISIONS, ROUTE 250 FORMS THE SOUTHERN BORDER, AND TO NORTH LIES UNDEVELOPED LAND WITH STREAM BUFFERS. OFFSITE AREAS: SOIL MAY NEED TO BE IMPORTED TO THE SITE FROM SITES WHICH SHALL HAVE EROSION CONTROL PERMITS. SOILS THE SITE CONTAINS THE FOLLOWING SOIL TYPES: 36C - HAYESVILLE LOAM - 7 TO 15% SLOPES, HSG B, SEVERELY ERODED 37C3 - HAYESVILLE LOAM - 7 TO 15% SLOPES, HSG B 37D3 - HAYESVILLE LOAM - 15 TO 25% SLOPES, HSG B, SEVERELY ERODED 56B - MEADOWVILLE LOAM - 2 TO 7% SLOPES, HSG A CRITICAL AREAS THERE ARE SEVERAL CRITICAL AREAS WITHIN THE SITE, THE CRITICAL SLOPES ON THE NORTHWESTERN SIDE OF THE PROPERTY FORMS THE BULK OF THE CRITICAL AREA. A RETAINING WALL WILL BE CONSTRUCTED ALONG THE SLOPES AND WILL MITIGATE EROSIVE CONDITIONS IN THIS AREA, SILT FENCING TO BE USED TO FILTER RUNOFF ALONG CRITICAL SLOPES. THE SECOND IS THE ENTIRE AREA WITHIN THE 100 FOOT STREAM BUFFER ALONG THE WESTERN -SOUTHWESTERN PROPERTY LINE, CONTRACTOR SHALL PROPERLY INSTALL AND MAINTAIN PERIMETER CONTROLS ACCORDING TO THE PLANS TO PREVENT POLLUTANTS AND SEDIMENT FROM ENTERING THE STREAM. 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 SEDIMENT TRAP: A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR ENOUGH TIME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS, STD, AND SPEC. 3.13. TO BE CONVERTED INTO A PERMANENT DETENTION POND AT THE END OF CONSTRUCTION AS DETAILED. 5, TEMPORARY DIVERSION DIKE: A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE, MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. STD. AND SPEC. 3.09. THE CLEANWATER DIVERSIONS WILL BE MADE STABLE BY THE USE OF VDOT LD -268 DESIGN STANDARDS. 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: PERMANENT SEEDING SHALL BE APPLIED TO AREAS DELINEATED ON THESE PLANS WITHIN SEVEN 1(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. MULCHING: APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE TO PREVENT EROSION AND FOSTER THE GROWTH OF VEGETATION. ORGANIC MULCHES (STRAW) HAVE BEEN FOUND TO BE THE MOST EFFECTIVE. 9. 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. 10.INLET PROTECTION: INLET PROTECTION MEASURES AROUNF THE NEW INLETS SHALL BE PROVIDED IN ACCORDANCE WITH STD. AND SPEC, 3.07, SILT FENCE, STRAW BALES OR TEMPORARY STONE APPLICATIONS SHALL BE APPLIED AS APPROPRIATE FOR CURRENT GRADE CONDITIONS. 11. OUTLET PROTECTION: IRIP-RAP SHALL BE PROVIDED AT THE OUTFALL OF CONVEYANCE CHANNELS, CULVERTS, AND STORM SEWERS IN CONFORMANCE WITH STD. AND SPEC. 3.18. OUTLET PROTECTION SHALL BE INSTALLED WITH ACCOMPANYING STORM SEWERS AND SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRED IF NECESSARY. ANT SEDIMENT BUILD UP SHALL BE REMOVED. PERMANENT STABILIZATION AND SEQUENCE OF CONSTRUCTION THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF CONSTRUCTION: STAGE 1 1. INSTALL CONSTRUCTION ENTRANCE OFF RTE 250. TRUCKS SHALL BE CLEANED PRIOR TO LEAVING SITE. 2. INSTALL SILT FENCE, TREE PROTECTION FENCING, DIVERSIONS, SEDIMENT TRAPS, AND SEDIMENT BASIN AS SHOWN ON SHEET C9. STAGE 2 CONTACT THE ENGINEER AND ALBEMARLE COUNTY FOR INSPECTION AND APPROVAL OF ALL E&S CONTROL MEASURES. STAGE 3 1. UPON APPROVAL OF E&S CONTROL MEASURES, BEGIN SITE WORK. 2. MAINTAIN PERIMETER CONTROLS UNTIL ROAD CONSTRUCTION IS COMPLETED AND AREA HAS ACHIEVED TEMPORARY STABILIZATION, 3. AS AREAS ARE BROUGHT TO GRADE, APPLY MULCHING, TEMPORARY SEEDING AND PERMANENT SEEDING. 4. INSTALL NEW CONTROL MEASURES AS SHOWN ON SHEET C10, 5. AS STORM STRUCTURES ARE CONSTRUCTED, INSTALL INLET AND OUTLET PROTECTION. STAGE 4 1, INSTALL BMP'S WHEN UPSTREAM GRADING IS COMPLETED AND HAS ACHIEVED STABILIZATION. CONTRACTOR SHALL EXERCISE EXTREME CARE WHEN INSTALLING BMP B. NO HEAVY CONSTRUCTION EQUIPMENT SHALL BE ALLOWED WITHIN THE FOOTPRINT AREA FOR THIS SYSTEM. 2. ESTABLISH AND MAINTAIN PERMANENT STABILIZATION, INCLUDING VEGETATION OF ALL SLOPES AND GRASSED AREAS. 3, WHEN SITE HAS REACHED STABILIZATION, REMOVE PERIMETER CONTROLS. 4. CLEAN OUT ALL SEDIMENT BUILDUP IN THE STORM SEWERS AND BMPS, 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 REQUIREMENTS 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. EROSION & SEDIMENT CONTROL PERMITTING CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL LOCAL AND STATE EROSION AND SEDIMENT CONTROL PERMITS AND MAINTAINING ALL EROSION AND SEDIMENT CONTROLS IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. GENERAL NOTES 1. THE INFORMATION AND DATA SHOWN OR INDICATED WITH RESPECT TO THE EXISTING UNDERGROUND UTILITIES AT OR CONTIGUOUS TO THE SITE AIRE 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. 2, WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, UTILITIES, ETC., THE CONTRACTOR SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM DAMAGE. ANY DAMAGE CAUSED BY THE CONTRACTOR OR IT'S SUBCONTRACTORS SHALL BE THE CONTRACTOR'S SOLE RESPONSIBILITY TO REPAIR OR REPLACE. THIS EXPENSE IS THE CONTRACTOR'S RESPONSIBILITY. 3. REPLACEMENT OR REPAIR 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, ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE CONSTRUCTION INDUSTRY (29 CFR PART 1926). 8, THE CONTRACTOR SHALL VERIFY THE LOCATIONS OF ALL BOUNDARIES, BUILDINGS, VEGETATION, AND OTHER PERTINENT SITE ELEMENTS. CONTRACTOR SHALL. IMMEDIATELY REPORT ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE OWNER AND ENGINEER, 9. 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 CONTRACTOR FROM THE RESPONSIBILITY OF ADHERENCE TO THE CONTRACT AND FOR ANY ERROR THAT MAY EXIST, 10. CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL NECESSARY PERMITS, INSPECTIONS, BONDS, AND OTHER RELATED ITEMS IN ACCORDANCE WITH LOCAL AND STATE POLICY. THE FOLLOWING INSTALLATION PRACTICES SHALL BE FOLLOWED AT THE SITE. 1. EXCAVATE THE INFILTRATION PRACTICE TO THE DESIGN DIMENSIONS FROM THE SIDE, USING A BACKHOE OR EXCAVATOR, THE FLOOR OF THE [PIT SHOULD BE COMPLETELY LEVEL, BUT EQUIPMENT SHOULD BE KEPT OFF THE FLOOR AREA TO PREVENT SOIL COMPACTION. 2, CORRECTLY INSTALL FILTER FABRIC ON THE TRENCH SIDES, LARGE TREE ROOTS SHOULD BE TRIMMED FLUSH WITH THE SIDES OF INFILTRATION TRENCHES TO PREVENT PUNCTURING OR TEARING OF THE FILTER FABRIC DURING SUBSEQUENT INSTALLATION PROCEDURES. WHEN LAYING OUT THE GEOTEXTILE, THE WIDTH SHOULD INCLUDE SUFFICIENT MATERIAL TO COMPENSATE FOR PERIMETER IRREGULARITIES IN THE TRENCH AND FOR A 6 -INCH MINIMUM OVERLAP AT THE TOP OF THE TRENCH„ THE FILTER FABRIC ITSELF SHOULD BE TUCKED UNDER THE SAND LAYER ON THE BOTTOM OF THE INFILTRATION TRENCH. STONES OR OTHER ANCHORING OBJECTS SHOULD BE PLACED ON THE FABRIC AT THE TRENCH SIDES, TO KEEP THE TRENCH OPEN DURING WINDY PERIODS. VOIDS MAY OCCUR BETWEEN THE FABRIC AND THE EXCAVATED SIDES OF A TRENCH. NATURAL SOILS SHOULD BE PLACED IN ALL VOIDS, TO ENSURE THE FABRIC CONFORMS SMOOTHLY TO THE SIDES OF EXCAVATION. 3, SCARIFY THE BOTTOM OF THE INFILTRATION PRACTICE, AND SPREAD 6 INCHES OF SAND ON THE BOTTOM AS A FILTER LAYER. 4, ANCHOR THE OBSERVATION WELL(S), AND ADD STONE TO THE PRACTICE IN 1 -FOOT LIFTS. 5, PLACE 96" CMP STORAGE PIPES AT SPECIFIED INVERT. PIPES MUST BE FLAT WITH A 0% SLOPE. 6. USE SOD TO ESTABLISH A DENSE TURF COVER FOR AT LEAST 10 FEET ON EACH SIDE OF THE INFILTRATION PRACTICE TO REDUCE EROSION AND SLOUGHING. STORMWATER MANAGEMENT NOTES: 1. ALL ONSITE RUNOFF SHALL BE ROUTED INTO EXISTING STREAM CHANNELS AT RATES THAT COMPLY WITH 9VAC25-870-66-B(3). 6 UNDERGROUND BMP'S SHALL MANAGE SITE RUNOFF AND RELEASE AT RATES THAT MEET THE ENERGY BALANCED EQUATION. DUE TO COMPLIANCE WITH THIS EQUATION, NO DOWNSTREAM ANALYSIS IS REQUIRED. 2. ONSITE RUNOFF SHALL BE MANAGED USING 5 UNDERGROUND DETENTION SYSTEMS AND 1 UNDERGROUND INFILTRATION SYSTEM. 3_ WATER QUALITY WILL BE ADDRESSED BY THE COMBINED USE OF 1 VRRM COMPLIANT LEVEL 1 UNDERGROUND INFILTRATION SYSTEM (BMP B) AND THE DEDICATION OF 18.59 ACRES OF EXISTING OPEN SPACE INTO SWM FOREST AND OPEN SPACE EASEMENTS. THIS WILL MEET THE VRRM REDEVELOPMENT NUTRIENT REMOVAL REQUIREMENTS PER 9VAC25-870-65. 4, BMP COORDINATES: • BMP A: 38.051977, -78.691188 • BMP B: 38.052823, -78.691475 • BMP C: 38.053567, -78.691135 • BMP D: 38.053719, -78.690585 • BMP E: 38.053229, -78.689478 • BMP F: 38.052671, -78.689395 5. BMP B DETAILS: BMP B IS A LEVEL 1 VRRM-COMPLIANT CONVENTIONAL UNDERGROUND INFILTRATION SYSTEM. IT WILL TREAT A TOTAL OF 3.68 ACRES, WHICH INCLUDES 1.38 ACRES OF IMPERVIOUS AREA. THE DESIGN TREATMENT VOLUME IS 6,116 CF, THE PROVIDED TREATMENT VOLUME IS 6,141 CF WITH A DRAWDOWN TIME OF 45 HRS. THIS IS ACHIEVED BY A DESIGN THAT INCORPORATES 2.75' OF PIPE STORAGE AND 1' OF STONE STORAGE UNDER THE PIPE. THIS IS LESS THAN THE MAX. ALLOWED STORAGE DEPTH OF 6' FOR CONVENTIONAL INFILTRATION PRACTICES, A 3" BACKUP UNDERDRAIN HAS BEEN INCLUDED WITH APPROPRIATE CHOKER STONE (VDOT #57 STONE) SPECIFIED. A MINIMUM SEPARATION OF 2.0' FROM GROUNDWATER HAS BEEN ACHIEVED. MINIMUM COVER OVER THE SYSTEM IS 2.0'. THREE FORMS OF PRETREATMENT HAVE BEEN UTILIZED: A GRASS SWALE, A GRAVEL CHECK DAM THAT WILL ACT AS A SURFACE SCREEN, AND A PRETREATMENT CELL WITHIN THE PIPE THAT IS SIZED AT 35% OF THE TREATMENT VOLUME. ALL RUNOFF ENTERING THIS SYSTEM WILL BE PRETREATED BY THESE METHODS. THE FIELD -MEASURED INFILTRATION RATE FOR THIS SYSTEM IS 1.12 IN/HR, THE DESIGN INFILTRATION RATE IS 0.56 IN/HR. THE DOWN -GRADIENT SLOPES HAVE AN AVERAGE OF 18.1% FOR 80' TO THE INTERMITTENT STREAM, WHILE THE UPSTREAM CDA HAS AN AVERAGE SLOPE <15%. THE INFILTRATION SYSTEM ITSELF HAS A INVERT SLOPE OF 0%. JAMS]a] Jil THE FOLLOWING INSPECTION NOTES SHALL BE USED DURING CONSTRUCTION OF BMP B. INSPECTIONS ARE NEEDED DURING AND IMMEDIATELY AFTER CONSTRUCTION TO ENSURE THAT THE INFILTRATION PRACTICE IS BUILT IN ACCORDANCE WITH THE APPROVED DESIGN AND THIS SPECIFICATION. QUALIFIED INDIVIDUALS SHOULD USE DETAILED INSPECTION CHECKLISTS TO INCLUDE SIGN -OFFS AT CRITICAL STAGES OF CONSTRUCTION, TO ENSURE THAT THE CONTRACTOR'S INTERPRETATION OF THE PLAN IS CONSISTENT WITH THE DESIGNER'S INTENTIONS. INSPECTION SHALL OCCUR DURING THE FOLLOWING KEY POINTS DURING CONSTRUCTION T0) INSURE SUCCESSFUL PERFORMANCE: 1, INSPECT ELEVATIONS OF THE EXCAVATION INVERT, ENSURE THAT THE SOIL AT THE BOTTOM OF THE INFILTRATION FACILITY HAS NOT HAS SMEARED BY THE EXCAVATION EQUIPMENT. THE BOTTOM SOIL SHOULD BE SCARIFIED WITH THE TEETH OF THE BACKHOE BUCKET. 2. INSPECT INSTALLATION OF THE BOTTOM 6 -INCH SAND FILTER LAYER AND THE INITIAL LAYER OF STONE PRIOR TO PLACEMENT OF CMP PIPES, 3, INSPECT STABILIZATION COVER ABOVE INFILTRATION PRACTICE. COVER IS SPECIFIED AS TURF. 4. INSPECT STABILIZATION OF ADJACENT PRE-TREATMENT FILTER STRIP AND THE CONTRIBUTING DRAINAGE AREA PRIOR TO BRINGING INFILTRATION AREA INTO SERVICE. UPON FINAL INSPECTION AND ACCEPTANCE, THE GPS COORDINATES SHOULD BE LOGGED FOR ALL INFILTRATION PRACTICES AND SUBMITTED FOR ENTRY INTO THE LOCAL BMP MAINTENANCE TRACKING DATABASE. FINAL BMP INSPECTION CHECKLIST ❑ PRE -CONSTRUCTION MEETING WITH THE CONTRACTOR DESIGNATED TO INSTALL THE INFILTRATION PRACTICE HAS BEEN CONDUCTED. ❑ SUBSURFACE INVESTIGATION AND SOILS REPORT SUPPORTS THE PLACEMENT OF AN INFILTRATION PRACTICE IN THE PROPOSED LOCATION. ❑ IMPERVIOUS COVER HAS BEEN CONSTRUCTED/INSTALLED AND AREA IS FREE OF CONSTRUCTION EQUIPMENT, VEHICLES, MATERIAL STORAGE), ETC. ❑ AREA OF INFILTRATION PRACTICE HAS NOT BEEN IMPACTED DURING CONSTRUCTION. ❑ ALL PERVIOUS AREAS OF THE CONTRIBUTING DRAINAGE AREAS HAVE BEEN ADEQUATELY STABILIZED WITH A THICK LAYER OF VEGETATION AND EROSION CONTROL MEASURES HAVE BEEN REMOVED. ❑ STORMWATER HAS BEEN DIVERTED AROUND THE AREA OF THE INFILTRATION PRACTICE AND PERIMETER EROSION CONTROL MEASURES TO PROTECT THE FACILITY DURING CONSTRUCTION HAVE BEEN INSTALLED. . ❑ EXCAVATION OF THE INFILTRATION PRACTICE HAS ACHIEVED PROPER GRADES AND THE REQUIRED GEOMETRY FOR THE SUBSURFACE INFILTRATION TRENCH OR THE SURFACE INFILTRATION BASIN WITHOUT COMPACTING THE BOTTOM OF THE EXCAVATION. ❑ CERTIFICATION OF EXCAVATION INSPECTION: INSPECTOR CERTIFIES THE SUCCESSFUL COMPLETION OF THE EXCAVATION STEPS LISTED ABOVE. ❑ FOR INFILTRATION TRENCHES, PLACEMENT OF FILTER FABRIC, AS REQUIRED, ON THE SIDE SLOPES. ❑ BOTTOM OF TRENCH HAS BEEN SCARIFIED. ❑ SIX-INCH FILTER LAYER OF SAND PLACED ON THE TRENCH BOTTOM ❑ OBSERVATION WELL INSTALLED. ❑ REMAINING STONE AGGREGATE PLACED (NOT DUMPED) IN 6 -INCH LIFTS. ❑ TOP SURFACE OF INFILTRATION PRACTICE IN ACCORDANCE WITH APPROVED PLANS. ❑ ALL EROSION AND SEDIMENT CONTROL PRACTICES HAVE BEEN REMOVED. ❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED. ❑ GPS COORDINATES HAVE BEEN DOCUMENTED FOR ALL INFILTRATION PRACTICES ON THE PARCEL. LONG-TERM BMP MAINTENANCE CHECKLIST • ENTRY INTO UNDERGROUND PIPES REQUIRES CONFINED SPACE CERTIFICATION. • THE DRAWDOWN RATE SHOULD BE MEASURED AT THE OBSERVATION WELL FOR THREE DAYS FOLLOWING A STORM EVENT IN EXCESS OF 1/2 INCH IN DEPTH, IF STANDING WATER IS STILL OBSERVED IN THE WELL AFTER THREE DAYS, THIS IS A CLEAR SIGN THAT THAT CLOGGING IS A PROBLEM. • CHECK INLETS, PRE-TREATMENT CELLS, AND ANY FLOW DIVERSION STRUCTURES FOR SEDIMENT BUILDUP AND STRUCTURAL DAMAGE. NOTE IF ANY SEDIMENT NEEDS TO BE REMOVED. • INSPECT THE CONDITION OF THE OBSERVATION WELL AND MAKE SURE IT IS STILL CAPPED. • CHECK THAT NO VEGETATION FORMS AN OVERHEAD CANOPY THAT MAY DROP LEAF LITTER, FRUITS AND OTHER VEGETATIVE MATERIALS THAT COULD CLOG THE INFILTRATION DEVICE. • EVALUATE THE VEGETATIVE QUALITY OF THE ADJACENT GRASS BUFFER AND PERFORM SPOT -RESEEDING IF THE COVER DENSITY IS LESS THAN 90%. • GENERALLY INSPECT THE UPLAND CONTRIBUTING DRAINAGE AREA FOR ANY CONTROLLABLE SOURCES OF SEDIMENT OR EROSION. • LOOK FOR WEEDY GROWTH ON THE STONE SURFACE THAT MIGHT INDICATE SEDIMENT DEPOSITION OR CLOGGING. INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND/OR LOCKS CAN BE OPENED AND OPERATED. • INSPECT INTERNAL AND EXTERNAL INFILTRATION SIDE SLOPES FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION OR SLUMPING, AND MAKE NECESSARY REPAIRS IMMEDIATELY. • INSPECT UNDERGROUND PRETREATMENT CELL. REMOVE SEDIMENT OR DEBRIS FROM PRETREATMENT. IF SILT BUILDUP IS NOTICED, REMOVE SILT AND REPLACE CLOGGED FILTER FABRIC IMMEDIATELY. • LONG-TERM MAINTENANCE INSPECTIONS SHOULD OCCUR ANNUALLY. MINIMUM STANDARDS (MSI: 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. STABLIZATION 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 30 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. 7. 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. & 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 alive 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. 13. CROSSING A LIVE WATERCOURSE: When a live watercourse must be crossed by construction vehicles more than twice in any six month period, a temporary stream crossing constructed of nonerodible materials shall be provided. 14. APPLICABLE REGULATIONS: All applicable federal, state and local regulations pertaining to working in or crossing live watercourses shall be met. 15. STABILIZATION OF BED AND BANKS The bed and banks of a watercourse shall be stabilized immediately after work in the watercourse is completed. 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. J P > ic, �57.�� ��SSI%fAL V" oo 1* �_ ___ __ --- BMP B AREA \\ N/ \ A- , ._' �.. I - \ `..-, A1- f ,1 -....s ` �� \ \ ...\\.;'r " \ �� \ �•�xsra�r�ii:"3' -,� �� :• • �• � _ �, !z \ \ \ 0 -4 . \ \ \ _o \ \� SEQUENCE OF CONSTRUCTION - STAGE 1 1. INSTALL CONSTRUCTION ENTRANCE OFF RTE 250. TRUCKS SHALL BE CLEANED PRIOR TO LEAVING SITE. 2. INSTALL SILT FENCE, DIVERSIONS, AND SEDIMENT TRAPS, AND SEDIMENT BASIN AS SHOWN ON THIS SHEET. SEE SHEET C14 FOR BASIN DETAILS. 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 SITE WORK. 5. MAINTAIN PERIMETER CONTROLS UNTIL ROAD CONSTRUCTION IS COMPLETED ,\ \ / 9z9 - - \ \ � AND AREA HAS ACHIEVED TEMPORARY STABILIZATION. NO DISTURBANCE � / _ �`-\ \ 1 6• CONTRACTOR SHALL NOT TRACK HEAVY CONSTRUCTION V HICLES V H OUTSIDE 20' — _ �`-� _ TR \ \ � \ \ \, - SANITARY ESMT. r / _ A 3 - ___ \ \ ,i � \ \ BMP B & BMP D FOOTPRINT AREAS. . -_- - - � -_ S�IMENT _ TRAP 3 P� VIEW . 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'+.+ +-4 4 + + r + l++++}+ +r++ + ' 1+4+-+ �N�t+ i } } '} } r { { } + } t a + r + a t + t + +++++++ ''+++,++.+.+++.++ -} 4 + + t # + a i -+ + + + + + + t + '+ + + + * ++ + + i r .{ i + t + -+ k r r +*� J '%I++++++ + + r t d a r + +, + + + ? + + + +. t . 4 +++ + + t +++++++++++ '+ + + + r + ! r + + + + + + + i + 4 + r +� I + } +.+++ ++.++ .+ } ; + } t t + + 4 f + } } { + + t + + +- r + } t . + t t + + t + t t '} ;. 4 # 4- # ♦ + + f 4 �/'-^~ } ♦ t # # + i * + 4 f fi t++*4 i +.t +++++ } t 4 } + ; i 4 + . { 4 iF + +.4 + + + ata + ♦ + + a/ t + t i 4 * + 4 . 4++++++++++4++++++++4+ { + 4 4- a + #- 4 + t + .f t r f 4 t } } { + + 't + + + } } 3 4 } 'y + 4 ++++ / +++'+4+ ' *a + + + + + + + + + + i + + + 4' + M +' + 4 t' 4 r + 4 4 + j/ , + + + + + + ++*+ ++++­%++++++++++ ' a * ++++++++++.4.+++ + + 4+ +'+-}*+'+ i 4 t f + + a 4 + + + + + 4*Y r t +* 4+ + + + + + + } ++++.++++ - . -r + + + r + fi + r r r.r + 4 y + }+ +- yam' .,I .,I+++++++++++++++++++++++ ++t++++i++%*#+t+++r*a+t*t}+++t+ta*t+*44}ti44+++++*+t+t**.*+*{*t*t++fi+*+{444a_..... r *+ I I ��=+=tta=+*r t + . r + + + ♦ +-+ + +'+ + + + r + ♦ 4 t r + + { + a + a + + + + + i + +. +:-++ +,.� - - + ♦ r + + + ( + + a a + 4 + + ♦ +.+ + + + t ++++.+++++ ' r + + + ++' -*++.+.++++'++++ + r + + + + _ +++++ + +'+ { ++++++++++++++++++++++ + + r + + + r-{ +.f 't ++.a++r i - # :++:::::+++: t 4 + _ . r + + + + t + i + ... t t { ..... . t + 4 4 + �t } 4 }- + " t + t r f t + + 14 r } -+ i + + +' r r 4 } 4 + 4 + { + + t + + + . + + + t +++`_'+`**) *+*tai+*+y+++*+*++r*+*++r*+ar*+++*�*+++++++}rr+++++++++++++++++.+.++t+++++++rr}r+``++`ra+% 100 Yr `�+' .+++++++,, ( r t { + 4 4 f } + '+ ; + + + t + fi . - - #-+: r44 ++a.+++.++ }++ ia +++%+++++}♦#+t+tfii}+}+++;}#++t++y++***.+++r+# .r ++r+.�% r -' Floodplainlain22,660 SF + + r +,++++++++++++++ t j153,150 SF + Replanting 4++ *a+*+r + +r*i+i♦+* *}.{i+♦+.t {+; 4 { *++ +{+tt+* + * t++++ . Area f{+{}+aaa+}+r+rf++t++*+* r a +. r+ Forest Open 37,400 SF ++ts♦ + ++.+++++++/1. Space Esmt B: Replanting +t+ + + { t+ ++X%%% + } i++ t} ++ ;+a+.r*� ,ct+i+}++4 12.8 AC Area ++++%* ..... r *+* . +*+� +*+*+++at++++*+ } . 4 t * { + +++++++++++++::++.:\ + } + r.+ + } + + + . + + t r + } + + )t/-++++:+++++++./+ +++r++�r++ + +*4 I+++ +++���jjj]]]+ ++%+a+++*+ r +) % +a++ ! 4 3 a ! te+4 a * { a+'+ba;+**�* *t+`+ a#t 4++♦+a++++++.+ + + ++j +♦ +4 ++{ai {♦ ++++ +/+*ata r + + JP'S'"r i i ♦ v + a + + X+++++++ ♦ + r' + + /+.+++++++. + + 4 + !�r'� ✓ �++itax{�*'T +a*t♦itr+itii*rr�a ft ,*+ i+ f�a+. +aa+ r O`a+++a++{+ta+ar{++;jl+aa r 100> Stream - 1081 SEEDLINGS *r- ✓� %�, f�esJ/ ' r " a@ i ++4 + + Buffer aari+ia*.ri+". + IN PARTIALLY i4}}++ +a 4++i@@+{f++aia'i.+i+"++} ♦ 4 + ♦++" FORESTED AREA EA 100' Stream - Buffer SET TRUNK PLUMB. SEE - PLANS FOR EXACT LAYOUT AND SPACING. TREE TIES, SEE SF 1-1/2" SQ. OAK SET 180 DEGREES APART FINISHED GRADE APPLY 2" OF MUL, PLANTING AND WA 4" COMPACTED EA WATERING BERM EXISTING GRADE PLANTING PIT. SEE EXACT REQUIREMEP SOIL, AND PLANTII` AMENDMENTS. REMOVE BURLAP FROM TOP 1/3 OF UNDISTURBED SOIL rT'NJREE PLANTING DETAIL ci � Not To Scale CIL i 314 SEEDLINGS ALONG SLOPES SEE PLANS FOR EXACT LAYOUT, SPACE PLANTS AS SPECIFIED IN PLANT LIST OR AS SHOWN. ADJUST SPACING AS NECESSARY OR AS DIRECTED BY LANDSCAPE ARCHITECT. MULCH 2" DEEP IMMEDIATELY AFTER PLANTING AND WATERd� THOROUGHLY. OA a� O P� PLANTING PIT. PREPARED SOIL FOR SHRUBS \ �� Forest & Open Space Esmt E: 0.50 AC i ACSA San. ' Easement: { No planting Forest & Open Space Esmt F: 1,62 AC A TOTAL OF 18.59 ACRES OF EXISTING FOREST FROM 108A SHALL BE PLACED IN AN CONSERVATION EASEMENT. CONSERVATION EASEMENT LIST A: 1.38 ACRES B: 12.08 ACRES C: 0.24 ACRES D: 0.45 ACRES E: 0.50 ACRES F: 1,62 ACRES G: 1.311 ACRES H: 0A 11 ACRES TOTAL: QUERCUS BICOLOR 18.59 ACRES 3210 SF Replanting Area Forest & Open Forest & Open Space Esmt C: P Space Esmt D: 0.24 AC 0.45 AC .r' 3 ; p, R TrE.t NE S vTi r 5E' fJ IC''r ri iPtE `(Y t}, DEN. E 4 r N LIMITS OF DISTURBANCE T tEs R -J T P t t' ree ro ec ion (Fencing (typ.) I 1 i 1 ; Mitigation Planting Schedule PLANTING CLASSIFICATION BOTANICAL NAME COMMON NAME PLANTING DETAILS QUANTITY CANOPY TREE FAGUS GRANDIFOLIA AMERICAN BEECH HIGH ZONE 100 CANOPY TREE LIQUIDAMBAR STYRACIFLUA AMERICAN SWEETGUM HIGH ZONE 100 CANOPY TREE PINUS STROBUS WHITE PINE HIGH ZONE 200 CANOPY TREE PINUS TAEDA LOBLOLLY PINE LOW ZONE 200 CANOPY TREE QUERCUS BICOLOR SWAMP WHITE OAK LOW ZONE 200 CANOPY TREE LIRIODENDRON TULIPIFERA TULIP POPLAR LOW ZONE 195 UNDERSTORY TREE OXYDENDRUM ARBOREUM SOURWOOD HIGH ZONE 100 UNDERSTORY TREE CERCIS CANADENSIS REDBUD HIGH ZONE 100 UNDERSTORY TREE HAMAMELIS VIRGINIANA COMMON WITCH HAZEL LOW ZONE 100 UNDERSTORY TREE SASSAFRAS ALBIDUM SASSAFRAS LOW ZONE 100 LOW MAINTENANCE GROUND COVER GALIUM ODORATUM SWEET WOODRUFF SLOPES > 3:1 NEAR EX. CANOPY SEED AS NEEDED LOW MAINTENANCE GROUND COVER ERNST SEEDS VIRGINIA GENTLEMEN'S MIX WILDFLOWER SEED MIX SLOPES > 3:1 IN OPEN FIELD MIN. 20 LBS/ACRE �PQ� TOTAL: 1395 Mitigation Planting Notes: -Species were selected by considering the topography of the mitigation zone delineated by high and low zones with the median range of the slope of the planting area, The areas designated "High Zone" will be planted with more dry footed species, and the "Low Zone" will be planted with wetter footed species. -Mitigation plantings shall be mixed to promote best growth. -Species can be substituted from Albemarle County Approved Planting List. -Contractor shall begin planting after earthwork is finished and shall complete plantings within 6 months. Seedlings shall be planted according to best practices as specified by the 3 USDA. 1 -Contractor is responsible for providing receipts of purchase of seedlings, tree tubes, and ff) matting. Engineers shall oversee seedling planting to ensure proper placement and installation. I i 4 -No preserved slopes shall be disturbed during mitigation planting. i i -HOA shall be responsible for keeping the mitigation planting area in reasonable condition for growth. HOA shall remove tree tubes within 24 months of planting. l i f 3 { I I i I LIMITS OF DISIII RBANCE A 1 t 1 i Forest & Open I t V ... ' Space Esmt G: i $ t 1,31 AC I i :. ... ...... r.._......i..._........_............... ... V ox ............. _ }110 , i t / • _...i -,tea. .. _ - �'.. a m /. i 1 , I i I l i i i 21 i i ill 8,240 SF t Replanting «'" "' % Area 50' Stream �. Buffer Disturbed \� •#� rt��,.{`,,�« Area in <uffer (tyP) �.` 8,650 SF �# Replanting \, Area Mitigation '\` Planting Area SET SHRUB PLUMB. TOP OF ROOTBALL SHALL NOT BE MORE THAN 1" ABOVE FINISHED GRADE ,4 d REMOVE BURLAP FROM TOP 1/3 OF ROOTBALL 4p A p 3" TALL WATERING BERM -"Q r -FINISHED GRADE -112 BALL DIi 1= A. MIN. (II II SOIL SURFACE _I (ROUGHENED =� -- — --_ — TO BIND NEW SOIL —III— 1=1 I I=1 —=111=11 1=1111 Ln 2 SHRUB PUNTING DETAIL Not To Scale i 100 t 100 200 3 IE# 00 VQ i I I ( I I ill Forest & Open Space Esmt H: 0.11 AC I i Tree IProtection / { Fencing (tyP•) r`'r re DISTuB , Forest & Open Space Esmt F: 1.62 AC J �`l C A1Demarie uounLy .m1L1 aLlon oLraLegy nequiremenLs C12 Not ToFScale --- ----- LEGEND 100' BUFFER DISTURBANCE + + + + + + + MITIGATION REPLANTING AREA +++++++ CONSERVATION EASEMENT [..--- ._......-.--._._._._ TREE PROTECTION FENCING LIMITS OF DISTURBANCE as a o Z N N W �i Z v W w d 0 1 � I V) z z N o � N W > W J W z W 0 \' l W i C Q w oz N U O M. SHIMP > (c, OT13 w S90111AL NEW a) —!Nr 7 � I STREAM BUFFER FLOODPLAIN PROPERTY LINE BUFFER AREA DISTURBED: 1.02 ACRES WITHIN 100' BUFFER MITIGATION OPTION 1C REQUIREMENTS: 0 1,395 TOTAL EVERGREEN AND HARDWOOD SEEDLINGS . PLANTED 8'x8' WITH TREE TUBES AND MATS PER 0 LIJ GUIDELINES I MITIGATION PLANTING CALCULATIONS Z • 44,610 SF Area Disturbed within Stream Buffer < • 89,220 SF Required 2:1 Ratio for replanting calculation G + 293,420 SF Available Replanting Area in Buffer EL Uj 2 Mitgation planting area within the Stream Buffer Shall 1 Have 1395 Plantings. Do not plans seedlings within > < ACSA Sanitary Easements or within 10 feet of storm sewers. Dote 07/19/2017 Scale 1 10 Sheet No. C11 OF18 File No. 15. a5� co 00 EEE E E E '`.J � •c �vvc� o 0 0 Ly 0 0 0 r- 00 �PQ� NEW a) —!Nr 7 � I STREAM BUFFER FLOODPLAIN PROPERTY LINE BUFFER AREA DISTURBED: 1.02 ACRES WITHIN 100' BUFFER MITIGATION OPTION 1C REQUIREMENTS: 0 1,395 TOTAL EVERGREEN AND HARDWOOD SEEDLINGS . PLANTED 8'x8' WITH TREE TUBES AND MATS PER 0 LIJ GUIDELINES I MITIGATION PLANTING CALCULATIONS Z • 44,610 SF Area Disturbed within Stream Buffer < • 89,220 SF Required 2:1 Ratio for replanting calculation G + 293,420 SF Available Replanting Area in Buffer EL Uj 2 Mitgation planting area within the Stream Buffer Shall 1 Have 1395 Plantings. Do not plans seedlings within > < ACSA Sanitary Easements or within 10 feet of storm sewers. Dote 07/19/2017 Scale 1 10 Sheet No. C11 OF18 File No. 15. a5� CONSTRUCTION OF A SILT FENCE (WITH WIRE SUPPORT) 1. SET POSTS AND EXCAVATE A 4"X4" 2, STAPLE WIRE FENCING TO THE POSTS. TRENCH UPSLOPE ALONG THE LINE OF POSTS. FLOW I4I 3, ATTACH THE FILTER FABRIC TO THE WIRE FENCE AND EXTEND IT INTO THE TRENCH. 4. BACKFILL AND COMPACT THE EXCAVATED SOIL. G FLOW EXTENSION OF FABRIC AND WIRE INTO THE TRENCH. _1 SILT FENCE SF W. WIRE SUPPORT C1 Not To Scale - --- Sediment Trap Design Data Na. A 8 C H (ft.) Z (ft.) Weir Length (ft.) DA (Acs.) Wet Vol. (Req) D1 (ft.) Wet Vol. Cy (Prov.) Bottom SA (sq. ft.) Dry Vol. (Req.) D2 (ft.) Dry Vol. Cy (Prov.) Top SA (Sq ft.) 1 622.0 625.0 627.0 3.0 3.0 13.0 2.17 145.4 3.0 147.0 1050 145.4 2.0 149.3 2436 2 613.0 616.0 618.0 3.0 3.0 14.7 2.45 164.2 3.0 171.8 1300 164.2 2.0 164.9 2660 3 609.0 613.0 616.0 4.0 3.0 15.7 2.61 174.9 4.0 177.8 840 174.9 3.0 246.7 2880 1' Z ORIGINAL "" I1 GROUND ELEV. L=C Top Surface Area 1.0 H DRY STORAGE D2 67 CU. YD./ACRE EL=B WET STORAGE 67 CU. YD,/ACRE D1 FILTER CLOTH ORIGINAL (EXCAVATED} GROUND EL=A Bottom Surface Area FLEW. *SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP CROSS SECTION OF OUTLET CLASS I RIPRAP LENGTH (IN FEET) _ 6 X DRAINAGE AREA �Wg// DIVERSION �-_ t� / DIKE J COARSE AGGREGATE 1 O EXCAVATED / FILTER CLOTH AREA **COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 OUTLET (PERSPECTIVE VIEW) TEMPORARY SEDIMENT TRAP STS C13 j Not To Scale GRAVEL CURB INLET SEDIMENT FILTER GRAVEL FILTER* RUNOFF WATER 4 -I li IIII,Ir= SEDIMENT CONCRETE GUTTER -112" SPECIFIC APPLICATION 12" WIRE MESH FILTERED WATER o a AT a=LL111_t A D A o � _ d p4 CURB INLET THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED AREAS. * GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE. ri" INLET PROCTIONIP) C13 Not To Scale -� ---- SAFETY 1"ENCE PERSPECTIVE VIEW WMI 1 tip -4 Ok(GAN"iC MULCH�C� MA'r`EMATERIALSS AND APPLICATION RATESRATESRATES: ADHESIVES MUt,CHES: * "�a'ii� Iia i•=•ii� �i•%iia'ii•i i••�i••�•��i���i�•*i iii%i iii*i�i�iisi�i�i�i�i��� � i�isi�i� �ii';�%%%ate%���%ii���*� i��i�i!��t�• � a 2 tans I II'• •tai••• • ••• •••i�.•- _ �•••••••d•• matter. Mint be anchored. Nozzle Gallons/Acre for 3/1 511 8/15 to Spread with mulch blower Anionic cover) Acta 1000 ftp or �� 111111{1, Fiber Mulch Minimum 3S lbs. Do not use as mulch for gn ': FOOTINGCONCRETE BRACING WIRE FABRIC \- LINE POST GROUND LINE PERSPECTIVE VIEW PERSPECTIVE VIEW PLASTIC FENCE METAL FENCE SOURCE: CONWED PLASTICS VDOT ROAD AND BRIDGE STANDARDS VA. DSWC r-4 "'), SAFTY FENCE SAF W 3 Nat Ta Scale PLATE. 3.1-1 1992 3.35 TABLE 335-A Ok(GAN"iC MULCH�C� MA'r`EMATERIALSS AND APPLICATION RATESRATESRATES: ADHESIVES MUt,CHES: N�}TES:. Per Acre .per 1.800 sq, ft. Strew or Bay � a 2 tans 7Q - 90 lbs. Free from weeds and coarse Type of 2 Adhesive matter. Mint be anchored. Nozzle Gallons/Acre for 3/1 511 8/15 to Spread with mulch blower Anionic cover) Acta 1000 ftp or �� 111111{1, Fiber Mulch Minimum 3S lbs. Do not use as mulch for Latex Emulsion lb's, Fine Spray winter cover or ditrill hot, Resin in Water 4:1 Fine Spray dry periods.' APP1Y as Acrylic Emulsion Use spring varieties (a,g., Noble). 0 slurry, Stale � - 6 tons 185 -.275 .lbs. Cut or shredded irl4,ti„ Acrylic Emulsion lengths. Air-dried. Do sliest (Traffic) 3.5:1 Coarse Spray use in line turf areas. Apply RYE' ri_' DUST CONTROL DC with mulch blower or by C� 3 Nat Ta Scale _ hand. Chips 4 - 6 tuns t85 - 275 lbs. Free of coarse ratter. Air- rSp34ri not less than 50 lbs.} dxied> Treat with 12 lbs nitrogen per ton. Do not cover. Tolerates cold and low use Iii fine turf areas. .Apply watt mlllch blower, chiphandler, or by ha1�d. Bark Chips 50 - 7Q cu. 1-'Z cu. yds. Free of coarse trotter. Air - or yds. approx. I Ib. dried. Do not 11e in fine Shredded turf axe. Apply with Barb Warm-seasoa amtual, Ries at first muic blower, chip handler,or, O CV by band. * When fiber 1�luleh. is the only available mulch during periods when straw be used, apply at a minimum rate 6f 2000 lbs,/ac. 1`1r 45 lbs.�`1t1t)�l sq. ft, frost. May be added to sunumt il&II 3 trues. ANNUAL RYEGRASS` 60 lbs. 1 h II X X X May be added in mix4i& Will fl {I, Ij.tuil W-Ulti-orum) mow out of most stands. WEEPING 15 Ibs. 51h on. X X Warm -season pese=al. May LOYEGRASS bunch. Tolerates hot, dry slope. (1~raa of s,(Is curvula and acid, infertile soils. May be added to mixes. KOREAN 25 Ibs. approx. I'h X X X X warns season annual leguma. LESPEDEW 16s. Source: Va. DSWC Ili TABLE 3.39-A ADHESIVES MUt,CHES: N�}TES:. Per Acre .per 1.800 sq, ft. Strew or Bay � a 2 tans 7Q - 90 lbs. Free from weeds and coarse Type of 2 Adhesive matter. Mint be anchored. Nozzle Gallons/Acre for 3/1 511 8/15 to Spread with mulch blower Anionic cover) Acta 1000 ftp or �� 111111{1, Fiber Mulch Minimum 3S lbs. Do not use as mulch for Latex Emulsion lb's, Fine Spray winter cover or ditrill hot, Resin in Water 4:1 Fine Spray dry periods.' APP1Y as Acrylic Emulsion Use spring varieties (a,g., Noble). 0 slurry, Stale � - 6 tons 185 -.275 .lbs. Cut or shredded irl4,ti„ Acrylic Emulsion lengths. Air-dried. Do sliest (Traffic) 3.5:1 Coarse Spray use in line turf areas. Apply RYE' ri_' DUST CONTROL DC with mulch blower or by C� 3 Nat Ta Scale _ hand. Chips 4 - 6 tuns t85 - 275 lbs. Free of coarse ratter. Air- rSp34ri not less than 50 lbs.} dxied> Treat with 12 lbs nitrogen per ton. Do not cover. Tolerates cold and low use Iii fine turf areas. .Apply watt mlllch blower, chiphandler, or by ha1�d. Bark Chips 50 - 7Q cu. 1-'Z cu. yds. Free of coarse trotter. Air - or yds. approx. I Ib. dried. Do not 11e in fine Shredded turf axe. Apply with Barb Warm-seasoa amtual, Ries at first muic blower, chip handler,or, O CV by band. * When fiber 1�luleh. is the only available mulch during periods when straw be used, apply at a minimum rate 6f 2000 lbs,/ac. 1`1r 45 lbs.�`1t1t)�l sq. ft, MULCHING MU _-- C13 Not Ta Scale TEMPORARY SEEDING TS C13 Nat Ta Scale � •�' III •�� •'� u . � Compacted Sail 0 W W �z n 0 d Z �• W W Z r� t F N 0 � N N W H Q 7 W Z W � O W_j 18" min. 4.5' min. s DIVERSION DIKE (DD C1 3 Not To Scale PAVED V � l i4 O r ,� 11 'f Sfr I it"i ENTRANCE -Flow PAVED CONSTRUCTION ENTRANCE Not To Scale PERMANENT SEEDING SPECIFICATIONS 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 Indian grass when slopes are greater than 3:1. May 1 through August 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Foxtoil Millet - 20 lbs/acre. Add 20 lbs/acre Indian grass when slopes are greater than 3:1. August 16 through October 31: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes greater than 3:1. November 1 through February 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Winter Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes 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 nee ds should be determined b soil tests Soil tests Y 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 CITY 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 (10 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 (10 lbs. per 1,000 square feet) or equivalent. ION DIKE 3 o PERMANENT SEEDING PS C13 Nat To Scale -�_- _---- - Q CTS O Z N U � JU M. SH1M1' > C . o. W3 0 r R0LLUj» Date 07/19/2017 Scale N/A Sheet No. C13 OF 18 File No, TABLE 3.39-A ADHESIVES USED FOR DUST CONTROL DATES Water Application souTip Dilution Type of Rate Adhesive (Adhesive: Water) Nozzle Gallons/Acre SPECIES 3/1 511 8/15 to 2/15 511 811 to to to Anionic Acta 1000 ftp to to 41368/15 1111 Asphalt Emulsion 7:1 Coarse Spray 1,200 Latex Emulsion 12.5:1 Fine Spray 235 Resin in Water 4:1 Fine Spray 300 Acrylic Emulsion Use spring varieties (a,g., Noble). 0 (Non -Traffic) 7:1 Coarse Spray 450 Acrylic Emulsion (Traffic) 3.5:1 Coarse Spray 350 RYE' ri_' DUST CONTROL DC X C� 3 Nat Ta Scale _ TEMPORARY SEEDING TS C13 Nat Ta Scale � •�' III •�� •'� u . � Compacted Sail 0 W W �z n 0 d Z �• W W Z r� t F N 0 � N N W H Q 7 W Z W � O W_j 18" min. 4.5' min. s DIVERSION DIKE (DD C1 3 Not To Scale PAVED V � l i4 O r ,� 11 'f Sfr I it"i ENTRANCE -Flow PAVED CONSTRUCTION ENTRANCE Not To Scale PERMANENT SEEDING SPECIFICATIONS 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 Indian grass when slopes are greater than 3:1. May 1 through August 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Foxtoil Millet - 20 lbs/acre. Add 20 lbs/acre Indian grass when slopes are greater than 3:1. August 16 through October 31: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes greater than 3:1. November 1 through February 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Winter Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes 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 nee ds should be determined b soil tests Soil tests Y 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 CITY 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 (10 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 (10 lbs. per 1,000 square feet) or equivalent. ION DIKE 3 o PERMANENT SEEDING PS C13 Nat To Scale -�_- _---- - Q CTS O Z N U � JU M. SH1M1' > C . o. W3 0 r R0LLUj» Date 07/19/2017 Scale N/A Sheet No. C13 OF 18 File No, TABLE 3.31-C TEMPORA Ry SEEDING PLAIT MATERIALS, SEEDING RATES, AND DATES SEEDING RATE NOIRTIV souTip w PLANT SPECIES 3/1 511 8/15 to 2/15 511 811 to to to CHARACTERISTICS Acta 1000 ftp to to 41368/15 1111 4/30 9/1 11/15 OATS 3 bu. (up to 100 lbs., 2 tbs. X X - o Use spring varieties (a,g., Noble). 0 (r„jYSM Livia not less than 50 lb%) RYE' 2 bu, tup to 116 lbs., 2.5 tbs. X X X X (3w for late fall wLcdings, winter rSp34ri not less than 50 lbs.} cover. Tolerates cold and low moisture. GERMAN MILLET 50 tbs. approx. I Ib. X X Warm-seasoa amtual, Ries at first O CV O frost. May be added to sunumt il&II 3 trues. ANNUAL RYEGRASS` 60 lbs. 1 h II X X X May be added in mix4i& Will fl {I, Ij.tuil W-Ulti-orum) mow out of most stands. WEEPING 15 Ibs. 51h on. X X Warm -season pese=al. May LOYEGRASS bunch. Tolerates hot, dry slope. (1~raa of s,(Is curvula and acid, infertile soils. May be added to mixes. KOREAN 25 Ibs. approx. I'h X X X X warns season annual leguma. LESPEDEW 16s. Toteraim acid soils. May be ( � added to mixes. a Northern Piedmont and Mountain region. See Plates 3.22-1 and 3.22-2. b Southern Piedmont and Coastal Plain. ° May be used as a cover crop with spring seeding. d May be used as a cover crop with fall seeding. X May be planted between these dates. w - May � be planted between these dots. TEMPORARY SEEDING TS C13 Nat Ta Scale � •�' III •�� •'� u . � Compacted Sail 0 W W �z n 0 d Z �• W W Z r� t F N 0 � N N W H Q 7 W Z W � O W_j 18" min. 4.5' min. s DIVERSION DIKE (DD C1 3 Not To Scale PAVED V � l i4 O r ,� 11 'f Sfr I it"i ENTRANCE -Flow PAVED CONSTRUCTION ENTRANCE Not To Scale PERMANENT SEEDING SPECIFICATIONS 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 Indian grass when slopes are greater than 3:1. May 1 through August 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Foxtoil Millet - 20 lbs/acre. Add 20 lbs/acre Indian grass when slopes are greater than 3:1. August 16 through October 31: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Annual Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes greater than 3:1. November 1 through February 15: Kentucky 31 Fescue - 128 lbs/acre; Red Tap Grass - 2 lbs/acre; Winter Rye - 20 lbs/acre. Add 20 lbs/acre Indian grass on slopes 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 nee ds should be determined b soil tests Soil tests Y 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 CITY 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 (10 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 (10 lbs. per 1,000 square feet) or equivalent. ION DIKE 3 o PERMANENT SEEDING PS C13 Nat To Scale -�_- _---- - Q CTS O Z N U � JU M. SH1M1' > C . o. W3 0 r R0LLUj» Date 07/19/2017 Scale N/A Sheet No. C13 OF 18 File No, ;= o 0 0 moo 000� O CV O 15.055 TEMPORARY SL O1 E DRAIN EARTHEN DIKE PROVIDE INLET CORRUGATED METAL (COMPACTED) PROTECTION EXTENSION COLLAR A �L WATERPROOF SEAL 24:1 D D+8" PROVIDE OUTLET PROTECTION STANDARD FLARED END SECTION SECTION VIEW NOTE: SEDIMENT MAY BE CONTROLLED AT OUTLET IF UPLAND PONDING WILL CREATE PROBLEMS EARTHEN DIKE (COMPACTED) 3:1 ■ TIERII TE ENt P E .b . x 6A Y LEP*. ;":`. TKL rfl'11'# TOT+` 0-h0G . '0 r TH,k ,�..'€6ieM1E ISE`�+i�i SE743w 60 H , fS3Fir i�ia{i5Yi5 wilt, FRE' `G,5AA�a FLARED,ENO-$ECTION FOR IT'4011 CONCRETE Pill CULVERTS Vlftda`lMSA: UWARTMENT OF IRANNPSECT iT"' RIR1 p0tt# ATION LARGEST PIPE. ° h �ldLCllLLl1P OFOifTLET PFE TES INVERT LOTION %-A0 -A PFE IF TREATMENT IN DROP INLETS Y SLOPE TO DRAIN r0 AVERT -OF ORlTLET PIPE � tai r i DETAAS. OF AVERT St1lf'NG A$ StWWIV HitEQN FRE FOR EKA#t?LE ° PUCiPO3E5 E3Nt Y. EACH MAAiOLE OR iHROP NLET 4S TO i£IAPEE)' Y TC BEST THiE ;"ARTICULAR INLET AND OUTLET ATION AND FLOW LNES. r SECTION B -B PLM METHOD OF TREATMENT IN MANHOLES ` flDT STANDARD METHOD OF SHAPING SRE�E. FICATION ROAD AIMS BRIDGE STANDARDS Hcvwk CATE MANHOLE & INLET INVERTS 108.08 VVIONIA OEPARTWNT OF TRANSPORTAMN SL -1 A-1115 BARS Q 8" C -C TYP. T-T-I:� 3 1 -1 -TT 1�...-� TTTTTT71 PLAN WALL TNICKIES VARIES P. .� �►+.-.t. ^air � _ :. 'LASS AJ CONCRETE 'a CLASS A3 C09METE SECTION A -A SECTION B -B NOTES, I. T STANDARD SAFETY SLAB ISL -D IS TO BE USED ONLY WHEN SPECfED IN THE PLANS .a1NCT 1N DOUNIAGE ➢ROPY Ii.ET3 WITH�HEICHITTHES DESCRIPTION, FEFEET�TrSALAMD OF ADJACENT SAFETY SLABS SHAT BE 8'TO 12'WITH NO SAFETY SLAB LOOTED WITHIN 8 FEET STN �PIWE SWDA E1Efl ORGREATERE SAFETY ABS SHALL NOT l LOCATED BELOW 2. THE COST OF' THE SL -1 6 INCLUDED N THE COST OF THE STRUCTURE. SEE CAST N PLACE DRAWNOS FOR FURTHER DETAILS 3, ACCESS OPENINGS ARE TO BE STAGGERED FROM ONE SIDE OF STRUCTURE TO THE OTHER WHERE: Al'PLICAB<.E. STEPS ARE TO BE STAGGERED ACCORDNCLY. N D BARS Q 8" C -C TYP. 4. SAFETY SLAB MAY BE CASTA"LACE OR PRECAST. CAST -N -PLACE CONCRETE TO BE _ GL\45 A3 13400 Psi). PRECAST OONO7'ETE IS TO BE A4.44000 PSI). REINFORCING • . STEEL TO BE N ACCORDANCE WITH AASHTO M31. 8. LcSSSTHMIE2 'TIE �CE6 OPE�NMG�L BE IECTMMLIV �STRU, WTURE DTNNBYN 30" LONG). TYPICAL PRECAST UNIT 1vort ST ARDS TYPICAL CONCRETE SAFETY SLAB FOR DROP INLETS, �'� ROAD '� REVISION DA MANHOLES AND JUNCTION BOXES SHEET 1 � 1 REVISgN DATE 302 p08.44 VIRGINIA DEPARTMENT OF TRANSPORTATION TEMPORARY RIGHT -OE -WAY DIVERSIONS v Y D+6" 18" 1 111 RII W 11 _ II =1 Ili 1 I11! 1� 1111= SECTION A - A TEMPORARY SLOPE DRAIN AS NEEDED C1 4 Not To Seale VPnT IL1 C( TYPICAL GRAVEL STRUCTURE IN It d i 91go mm Not To Scale 635 625 620 615 610 C) N 6010 00 10+50 11+00 SEDIMENT BASIN PROFILE 1 4 HOR. 1"=20, VERT: 1"=7' DESIGN HIGH WATER (25 -YR. STORM ELEV.) MIN. 2.0' MIN. 3.0' MIN. 0.5� MIN. 1.0' 7 B: SEDIMENT/ CLEANOUT POINT A: BOTTOM DESIGN ELEVATIONS WITHOUT EMERGENCY SPILLWAY (RISER PASSES 25 -YR. EVENT) NOT TO SCALE A 640 / / / l 635 630 620 615 610 11 +505 PIPE OUTLET CONDITIONS A ANL',A TY1111 INV VLV11NLL) CHANNEL L a 0 % > I Ill -ill d 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. 010 (cfs) La (ft) Do (ft) 3Do (ft) d50 (in) Wet Wet Dry Dry Vol. 14.0 A B C Riser DA Vol. Vol. Cy Vol. Cy 25 yr 6.0 9.0 Channel Elev. (Acs.) (Req.) (Prov.) (Req.) (Prov.) WSE 621.5 624,0 625.1 627.40 3.78 253.3 259.0 253.3 268.0 628.00 NOT TO SCALE A 640 / / / l 635 630 620 615 610 11 +505 PIPE OUTLET CONDITIONS A ANL',A TY1111 INV VLV11NLL) CHANNEL L a 0 % > I Ill -ill d 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. Not To Scale r/ \+ SEDIMENT BASIN PLAN VIEW SCALE: 1"=20' -- GFA VEIL AND WIRE MESH DROP INLET )S'ETDIIAIENT FIL TER 18" MIN. RUNOFF WATER WITH SEDIMENT GRAVEL *(12"MIN. DEPTH) ,II a l- a d4 _61 ill Q o (! WIRE MESH SEDIMENT FILTERED WATER * GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE. r4��DROP INLET PROCTION IP C 14 Not To Scale DRIP LINE ado (MIN.) 'IPE OUTLET TO WELL )EFINED CHANNEL SNOW FENCE BOARD FENCE CORD FENCE may/ vJ tem"- ,�" ' woo 00 001 CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE. 8 TREE PROTECTION FENCING Not To Scale Y o U JU M. SHIMP c o. , 18 010 (cfs) La (ft) Do (ft) 3Do (ft) d50 (in) depth (in) Outlet Condition SEDIMENT BASIN OUTFALL 15.00 14.0 1.25 3.75 9.0 15.0 Flat 131 9.83 9.0 1.00 5.00 6.0 9.0 Channel 01 10.34 10.0 2.00 6.00 9.0 15.0 Flat 04 7.57 6.0 2.00 6.00 6.0 9.0 Channel 08 1.00 3.0 1.25 3.75 6.0 9.0 Channel 010 0.89 3.0 1.25 3.75 6.0 9.0 Flat Road Culvert 2.22 3.0 1.25 3.75 6.0 9.0 Channel Not To Scale r/ \+ SEDIMENT BASIN PLAN VIEW SCALE: 1"=20' -- GFA VEIL AND WIRE MESH DROP INLET )S'ETDIIAIENT FIL TER 18" MIN. RUNOFF WATER WITH SEDIMENT GRAVEL *(12"MIN. DEPTH) ,II a l- a d4 _61 ill Q o (! WIRE MESH SEDIMENT FILTERED WATER * GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE AGGREGATE. r4��DROP INLET PROCTION IP C 14 Not To Scale DRIP LINE ado (MIN.) 'IPE OUTLET TO WELL )EFINED CHANNEL SNOW FENCE BOARD FENCE CORD FENCE may/ vJ tem"- ,�" ' woo 00 001 CORRECT TRUNK ARMORING TRIANGULAR BOARD FENCE. 8 TREE PROTECTION FENCING Not To Scale Y o U JU M. SHIMP c o. , 18 660 +1111_.. 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E........ 10+00 1111_...1.11-11.1111-11. 10+50 11.11.... ...1111....1111. .1111....... 11 + 00 10+00 _ . 1111 10+50 11+00 11+50 12+00 STORM SEINER PROFILE: STM C3-C3B 7 STORM SEWER PROFILE: STM 131-136 15SCALE: I"=20' Horizontal, 1"=10' Vertical J C � 5 SCALE: C=20' Horizontal, 1"=10' Vertical T _ _ __ --1 650650 I 1.1.11111 - 645 _� 640 I 635 i .... 630 ...e :i 625 _ 620 _I : _615 11+50 12+00 12+50 Z, NOTE: BMP MUST BE INSTALLED ONLY V 9- -GRADIENT GRADING HAS . ..... TER ALL UP AF BEEN COMPLETED AND AFTER -PRELIMINARY STABILIZATION ACHIEVED. 3 - ---_-_-_ `x PROVIDE SELF -TAPPING SCREWS EVERY 5) TO SECURE FILTER FABRIC. FILTER FABRIC - ----- IN PIPE SHALL BE "US 350" GEOTEXTILE. /x W y . . ..... ... 4� r < 30 -A. FILTER J FABRIC 41 PRETREATMENT 3: r -13-1 N_j28 T - ------------- r,7777 I I V-, Xv, 6. 8 NT�-"_'__ -Z 7- 3: SUMP 28 7 WEIR V 625 W -B 2 CLAS IA HEIGHT =6': S_ 81A 48" DI -7 Rfl RAP 1 DEPTk=6" VDOT #3 STONE WIDTH J 2 L 0 CMP 77-2 b' DETAIL 5 7777-7- 10 -YR WSE=f ------ - ----- Jo- CMP LINER. CROSS COVER WITH US 16D NW FILTE FABRIC. BMP B GRADING PLAN STONE ACCESS RISER 2 `6- -2 < WEIR `P L A" T 625 W -B 2 CLAS IA HEIGHT =6': S_ 81A 48" DI -7 Rfl RAP 1 DEPTk=6" VDOT #3 STONE WIDTH J 2 L 0 CMP 77-2 b' ACCESS RISER_ 10 -YR WSE=f . ..... OVER IMFERVIOUS LINER. �1­�'�4'-r �TURF COVER WITH US 16D NW FILTE FABRIC. BMP B GRADING PLAN C16) SCALE: I"=20' BOLTED SUMP PIT. SEE ... . ...... . ON INSIDE DETAIL BELOW 02 _X Zt. C:) C Z.... ....... INLET ? ......... .... STRUCTURE BlA ch� WEIR O PLATE W -B2 22.5' 0- ­ - -Ij L BEND . ..... u'12+25 12+00 11+1t) I I +!)U uu 2 BLIP B �-IN�FILT.RATIO 635L...........__......._ . ..... 9 LF CLASS 1 RIP -RAP OP DEPTH= 15" 625 CHECK IAM ............. 625 31 LF TOP= 62 7.2 CLAS IA HEIGHT =6': S_ 81A 48" DI -7 Rfl RAP 1 DEPTk=6" VDOT #3 STONE WIDTH f 2' Rlim Elev.=626.8 . 8 SEE DETAII_ .........DEPTH . .. ... .... ... ..... 6 ..... ......... ............ ... ..... .. .. .. ............... TOP OFo _' BERM=628.30 10 -YR WSE=f 27.99 OVER IMFERVIOUS LINER. �1­�'�4'-r �TURF COVER TOP OF BMp B _j IMPERVIOUS VDOT #3 LINER: 'ps STONE=625.0 CONCRETE LEVEL STONE FABRICS P! PLACE IMPERVIOUS I'vC SPREADER LIP DEPTH=2,4" GEOMEMBRANIE LINER BETWEEN C 6"x 24" x10' c SET _3,,._ABOVE..... 620 #57 -STONE SND.._..... -1.1-1-11­11.11I.I.I..".." #3 STONE TOO OF RIP -RAP SEDIMENT TRAP CEL( i GRAY L DIAPHRAGM 0+40 3 STA, 10+00 1 STA. 10.+..4....._- ............. .. ... .. .. . 615 10+00 PRETREATMENT I & 2 PROFILE - 21 )SCALE: 1 =10' Horizontal, C=5' Vertical I I D i o i GM 16-+ 10+50 635 630 —.........._...........I ...........I ............. 625 USE WAS ED #57 STONE IN DIAPHRAGM. DEPTH=18" FORM RING AROUND INLE . MIN BOTT M WIDTH 18" 3' MN SIDE SLO .......... D E=1:1. INSTALL 620 OVER IMFERVIOUS LINER. 4 WRAP SIDES WITH US 16D NW FILTE FABRIC. Din SCALE: 1"=10' Horizontal, 1"=5' Vertical PRETREATMENT CELL FILTER FABRIC DETAIL US 350 GEOTEXTILE FILTER FABRIC INSIDE CMP PIPE, INSTALL USING SELF - TAPPING SCREWS. CLOGGED If FABRIC SHOULD BE REPLACED AS PART OF 4.0 % ANNUAL MAINTENANCE PI AGC 141 ImI1LKvIu(jb ULLL: J 'blUINt LINER 0 18" DEPTH (�5PRETREATMENT I SECTION L SCALE: 1"=10' KEY IN LINER 6" 630 625 620 615 GRAVEL DIAPRAM NCRETE A DAM RADIUS LEVEL SPREADER APPROX. 4.5' CENTERED ON 2.6% El DI -7 INLET 6" PVC OBSERVATION SEDIMENT BARRIER FILTER FABRIC WELL WITH BRASS (TOP ONLY) CAP SEE PLAN VIEW FOR DETAILS 6" FILTER GRAVEL it US 160 NW FILTER FABRIC (SIDES) is �28 Z 28 L 47- TI+ 'iY;1 6111"', FLOW DIRECTION VDOT #1 STONE"' 20C CLASS 1A RIP -RAP CHECK DAM DETAIL PRETREATMENT 2 DETAIL SCALE: V=10' GRADE ELE=625.00 VTIT it 1 2' MIN. OVERLAP (TYP.) INV ELE=616.50 4" PERFORATED BACKUP 1 1 UNDERDRAIN. INSTALL 3 BELOW PIPE INVERT, MIN. 4 17 NOTE- FILTER FABRIC WW11161`61E 12" STONE BELOW PIPE PLACED ON TRENCH BOTTOM REINFORCED --- STEEL PLATE (TYP.) INSTALL TRASH RACK ON ORIFICES WEIR PLATE W-131 WEIR PLATE W-132 -REINFORCED STEEL PLATE (TYP.) INV ELE=619.25 11 0 ORIFICE 16.50 ELE=618.50 ELE=616.50 7 BMP B INFILTRATION DETAILS C16fSCALE: 1"=5, SCHEMATIC DRAWING- �1=25; 0 :i 0 LO 0 6 Z fy N W W �77 q Z �> � � Z W WZ 2 0 2: Z V) 0 W D > I W _j V) > W 0 0 1 N 0 Yu SHIMP > ro 1T 'SSI01VAL W q) =0 EE C E E F- 0 0 0 0 0 0 00f) co c:f own. R 0 as 0 0 L Z < uj Lu J > Date 07/19/2017 . Scale 1 20' Sheet No. C16 OF 18 File No. 15.055 _67 7 SMtl 57,R, 00 -YR WSE 62 47 x 7 10 -YR WSE 622.83 3' MN 1 -YR WSE 619,52 3' MIN. 96" PERFORATED 4 CMP - - - -- - - - - 8 57 STONE GRADE ELE=625.00 VTIT it 1 2' MIN. OVERLAP (TYP.) INV ELE=616.50 4" PERFORATED BACKUP 1 1 UNDERDRAIN. INSTALL 3 BELOW PIPE INVERT, MIN. 4 17 NOTE- FILTER FABRIC WW11161`61E 12" STONE BELOW PIPE PLACED ON TRENCH BOTTOM REINFORCED --- STEEL PLATE (TYP.) INSTALL TRASH RACK ON ORIFICES WEIR PLATE W-131 WEIR PLATE W-132 -REINFORCED STEEL PLATE (TYP.) INV ELE=619.25 11 0 ORIFICE 16.50 ELE=618.50 ELE=616.50 7 BMP B INFILTRATION DETAILS C16fSCALE: 1"=5, SCHEMATIC DRAWING- �1=25; 0 :i 0 LO 0 6 Z fy N W W �77 q Z �> � � Z W WZ 2 0 2: Z V) 0 W D > I W _j V) > W 0 0 1 N 0 Yu SHIMP > ro 1T 'SSI01VAL W q) =0 EE C E E F- 0 0 0 0 0 0 00f) co c:f own. R 0 as 0 0 L Z < uj Lu J > Date 07/19/2017 . Scale 1 20' Sheet No. C16 OF 18 File No. 15.055 635 620 � i � _-W—Al .. --- ----------------------- } i E.... 30 .-CMP Riser. _.... ..... ... ... .... ...... ...__......... ..._...... ....... ........................ this page_........... STRUCTURE With -Cast } 1 Lid _...... a aP s i a _._ I ..... .Pre„ _Manho.le Rim Elev 624.9 (Flush ...._. _ ... .. ...... ;w. grade) k } EXCAVATION ELEV.'--611.8' II , I 6' _...... Brass cap Inscribed _ _. _ ................ . ..P.VC. Observation Well with Well depth 625 . I MIN DETAIL)al j r BIP A ELE=613.50.... PIPE PROFILE NOTE: BMP A BARREL 1 I , � 7 V f 1 vr,✓' jr' d } t 7 f d — SHOWN IN PROFILE } .............. .......... ....._.. . dux. 4.0' SOLID SEC TION ..,y.'. J .;ic... S'"/ b P ATE 1N AFTER WEIR L ..,^""-.'•.f X, 9 l� - n:..31 ,e _.... . .. ................ ._.---Weir Plate :.._.. .................. ..... Weir Plate W=A2; Barref 620 � "�� � _-W—Al .. --- ----------------------- yrM �.. .... See....detcil.... INV ELL -16-131.5011 ' `°•^' ,. JI this page_........... STRUCTURE t oy.».' °. .;R..w : '"�'a �a d N Y , f E_........ ,,.,,,.. ,,.{{�. k .'...mo _....... b, ... .,•N ...: ,..,lr .. 6,""%.n .... ,°". .✓ g .. s -:+^C w"•h ......_. ..... _d, ....FC`' F '✓" y,�^^ Z e. � gym. i .X^.�^'^ S If o Xz _...... a aP s i a INSIDE �w ii4' OVERLAP k I9 EXCAVATION ELEV.'--611.8' II , I � ........... ............. ..,. t 615 ;, 10+75 _.................... 11+25 _ MIN DETAIL)al j r BIP A ELE=613.50.... PIPE PROFILE NOTE: BMP A BARREL 1 r d` P , � 7 V f 1 vr,✓' jr' d } t 7 f d — SHOWN IN PROFILE V #57 STONE 1' #57 STONE 4.0' SOLID SEC TION H PE OUT 24 D P ATE 1N AFTER WEIR L 610 ;....... 10+00. , . _............... ARREI...1.. 10+25 f] 605 600 595 Nertoratlons trlroug depth._. of ' gravoi ...... .. .... ........ ............ ........ ............. ............ --- ----------------------- ........ .^a •^ .,,,u , Y 7 T 6" 5 SONE INV ELL -16-131.5011 ' `°•^' ,. K, ... y .,,, 4 ,,,� . -, a.« ; y .yC" .,.....,. ,=^'r3.. .... i' :.� ...... .......... ...T'hz ... .,. -a.. ... ..., .i; ......._y ,4........... of d STRUCTURE t oy.».' °. .;R..w : '"�'a �a d N Y , f E_........ ,,.,,,.. ,,.{{�. k .'...mo _....... b, ... .,•N ...: ,..,lr .. 6,""%.n .... ,°". .✓ g .. s -:+^C w"•h ......_. ..... _d, ....FC`' F '✓" y,�^^ Z e. � gym. i .X^.�^'^ S If o Xz n t a aP s i a INSIDE SOLID ii4' OVERLAP k 96" PERFORATED CMP —•— (TYP,) EXCAVATION ELEV.'--611.8' II _I....._ ........_ ..._.......... .... _...... .............. .. .............. ' ..__...... ......_...... ........... _.......... ........... ............. ..,. 10+50 1—YR WSE 615.77 10+75 11+00 11+25 11+50 MIN DETAIL)al j r BIP A - DETENTION PIPE PROFILE NOTE: BMP A BARREL 1 (;17 SCALE: V;=10' Horizontal, 1"=5' Vertical — SHOWN IN PROFILE V #57 STONE US 160 NW --� FILTER FABRIC (SIDES) 10+00 10+25 10+50 10+75 11+00 3 BLIP C -DETENTION PIPE PROFILE NOTE: BMP C BARREL 1 X17 SCALE: 1"=10' Horizontal, 1"=5' Vertical SHOWN IN PROFILE 6" PVC OBSERVATION WELL WITH BRASS CAP SEDIMENT BARRIER FILTER FABRIC (TOP ONLY) NOTE: f1LTER FABRIC SHOULD NOT BE PLACED ON TRENCH BOTTOM PROP. GRADE NOTES: INFILTRATION PIPES SHALL HAVE A 07o SLOPE AND A MINIMUM V SOIL COVER. FOR CLARITY, INFILTRATION FEATURES ARE SHOWN IN THE SAME PLANE, BUT THEY SHOULD BE LOCATED ACCORDING TO THE PLAN VIEW. WEIR PLATE W—C1 INSTALL TRASH — RACK ON ALL ORIFICES ELE=601.50 11" 0 ORIFICE `—" REINFORCED STEEL PLATE (TYP.) INV ELE-598 00'%' ELE=598.00 2.5" 0 ORIFICE _B_P_C_ - _DETENTION PIPE DETAILS SCALE: SECTION: 1"=5', SCHEMATIC DRAWING: V=25' T WEIR PLATE W -C2 NOTES: INFILTRATION PIPES SHALL HAVE A 0% SLOPE AND A MINIMUM 1' SOIL COVER. FOR CLARITY, INFILTRATION FEATURES ARE SHOWN IN THE SAME PLANE, BUT THEY SHOULD BE LOCATED ACCORDING TO THE PLAN VIEW. WEIR PLATE W -A1 INSTALL TRASH y / RACK ON ALL F` ORIFICES ELE=615.60 11" 0 ORIFICE INV ELE=613.50 6" PVC OBSERVATION WELL WITH BRASS CAP SEE PLAN VIEW FOR DETAILS 615 610 605 595 11+25 ELE=601.00 ELE=598.00 1 ii ii ii i� US 160 NW FILTER FABRIC (SIDES) i i i i i i i OUTL. WEIR PLATE W -C1 SEDIMENT BARRIER FILTER FABRIC (TOP ONLY) -REINFORCED STEEL PLATE (TYP.) ELE=613.50 ~ 2.5" 0 ORIFICE WEIR PLATE W -A2 & W -A3 GRADE 6" FILTER GRAVEL + WEIR` q q a - 0 ELE-522 0 --- ----------------------- ----- ------ �� --- 7T--- 1.7 YR WSE 62 2 100-YR 100 7 T 6" 5 SONE .f` W—A2 K, yy STRUCTURE 10—YR WSE 619.41 Xz K 4 ii 2' MIN. INSIDE SOLID ii4' OVERLAP 3 MIN. 96" PERFORATED CMP —•— (TYP,) 3 AFTER WEIR %'j;' r•/ ago i i 1—YR WSE 615.77 3 .,WEIR PLATE EE// i i ' MIN DETAIL)al j r s 1 — .F V #57 STONE 1' #57 STONE 5ANQ':.lAY 'R. ELE=615.50 ELE=613.50 INLET STRUCTURE Al FILTER FABRIC BOLTED ON INSIDE WEIR PLATE W—A3 L g :.. i i•..,, I,....,.....I 0b" f"1LTER FABRIC SHOULD NOT BE PLACED ON TRENCH BOTTOM L2) BMP A - DETENTION PPE DETAILS SCALE: SECTION: C=5', SCHEMATIC DRAWING: 1"=25' 4' SOLID WEIR` PIPE SECTION - 0 ELE-522 0 PLATE s PLATE .f` W—A2 K, r . f STRUCTURE i. FILTER FABRIC BOLTED ON ii 2' MIN. INSIDE SOLID ii4' OVERLAP INLET PIPE SECTION STRUCTURE AFTER WEIR AlA PLATE i i i i i i INV ELE=613.50 s 1 g :.. i i•..,, I,....,.....I 0b" f"1LTER FABRIC SHOULD NOT BE PLACED ON TRENCH BOTTOM L2) BMP A - DETENTION PPE DETAILS SCALE: SECTION: C=5', SCHEMATIC DRAWING: 1"=25' 4' SOLID PIPE SECTION AFTER WEIR PLATE INLET STRUCTURE CIA FILTER FABRIC BOLTED ON INSIDE 'IPE C INLET IR PLATE C2 NOTE: BMP'S MUST BE INSTALLED PP AFTER ALL UP—GRADIENT GRADING HAS BEEN COMPLETED AND AFTER PRELIMINARY STABILIZATION ACHIEVED, PROVIDE SELF—TAPPING SCREWS EVERY 5' TO SECURE FILTER FABRIC. FILTER FABRIC SHALL BE "US 350" GEOTEXTILE. PRETREATMENT CELL FILTER FABRIC DETAIL US 20 OEOTEXTiLE FILTER FABRIC INSIDE CMP PIPE. INSTALL USING SELF - TAPPING SCREWS. CLOGGED ! t FABRIC SHOULD BE REPLACED AS PART OF 40 ANNUAL MAINTENANCE BLIP PRETREATMENT CELL DETAIL SCALE: 1"=5' Bross cap inscribed 625 fti: ......... ... .. ............ ST 07 30 CMP Access Riser ..... 7"" with well depth TO wx!R 2' Rim Elev.=619.5 (Flush w. qrade) WEIR CD ... ...... . . ........... .. ....... ... 11111111--111 . .. ............ .................... . ... .......... , 6 .......... ............ ........ - +1 4 W -D2 Observation Well ....................... .... ......... r::� ............... .... ... ... ... .... -=11111.1=1.11- I I C) ..... ... ..... AFTER- WEA D 1 .................... ........ - ............ . . .... . ........ ...... . . .............. . .. .. . ... ......... . ............ . . ...... ..... ................ 77— 620 530 SF Area of 11 -1 11 � 1-11-1 - - ­­­.. 11.11.1 �.. ".. ".. �... I. I.I...111-1 ..... . ........ .. ... .. .. ... .. . .. . ............. .......... .... .................. Wrap Sides --in.,_ US LO -__-____ V� .......... . .. 625 Proposed rade ­­ .1. 1-1 INFILTRATION PIPES SHALL HAVE A 0% SLOPE AND A MINIMUM V SOIL COVER. .... .... .. 620 6" PVC OBSERVATION Ex: lGrade WELL WITH BRASS CAP --PROP. GRADE 11.1.11.111,11, 1 r ___711 �,�_77 - 6" FILTER ....... ..... REINFORCED STEEL GRAVEL WEIR PLATE W D1 ..... ..... ..... - - ­ ---- -­- . ..... . .... ........... .... . ............. - --------- -- 4 LF 48 ERF'ORATED . —1 �_V.LILJ 3_"__HDPE . ... ... ... . 4 7 !jPRE -7 615 Z INV ELEV.=61-,3.00 / /I P. .......... .... ...... ....................... - -­- -­­ - ELEV. ,-641 -. 15" HDPE .......... .... . ...... . ............................. . . 610 OUT Weir Plate W -D1. Weir PlaPlateW-D2 .... ... ....... ....... .... ................ ..... ................... Sta. 16' 647'See 9. See 605 10+00 10+25 BMP D DETENTION PIPE PROFILE SCALE: 1"=10' Horizontal, 1"=5' Vertical ,NYLOPLAST DRAI Aq) 0": '01=011:10 �4 WNGTO Oix "ifm 11gff rwlt, atri ENGINEERING NOTE: NO OUTLET DRAIN, INVERT CAPPED WITH GRATE OR WIRE MESH 10+50 675 670 665 660 655 615 -YR WS 616.82 10 -YR WSE 615.52 100 I -YR WS E 614.35 ELE=617,50 T0 P=616.50 FABRIC (SIDES).46 2' MIN OVERLAP 6" 0 ORIFICE US 160 NW FILTER INV, ELE=61 I 'V. ELE=613.00 INVELE=613.00 610 NOTE- FILTER FABRIC SHOULD NOT BE PLACED ON TRENCH BOTTOM 605 FILTER FABRIC BOLTED ON INSIDE 665 660 665 660 REINFORCED STEEL fti: NWRI AY MO 6" #57 STONE7z,7--�-g �'f' WEIR PLATE W -D2 TO wx!R 2' N IN. 2 WEIR PERFORATED . ......... .......... 11-4 HDPE PLATE , 1 1 57 STONE ELE=617,50 T0 P=616.50 FABRIC (SIDES).46 2' MIN OVERLAP 6" 0 ORIFICE US 160 NW FILTER INV, ELE=61 I 'V. ELE=613.00 INVELE=613.00 610 NOTE- FILTER FABRIC SHOULD NOT BE PLACED ON TRENCH BOTTOM 605 FILTER FABRIC BOLTED ON INSIDE 665 660 665 660 REINFORCED STEEL fti: NWRI AY MO v QtJ I �J WEIR PLATE W -D2 TO wx!R Y r le 7 7'r 7 7511 7- 777 7_7 7 77 7,,7' 6" Topsoil over WEIR Depth . ......... .......... 11-4 ),sg .... . Fiff F' ric i era J ab PLATE ....... .. INLET 655 Filter Fabri 655 W -D2 PROPOSED---- ST RUCTURE ...................................... . . .. ....... . .... ... .......... . ..... . .. .......... .... TOP=615.00 615 D 1 .................... ........ - ............ . . .... . ........ ...... . . .............. . .. .. . ... ......... . ............ . . ...... ..... ................ Z, �11 J-na-", �, I1 3A 530 SF Area of 11 -1 11 � 1-11-1 - - ­­­.. 11.11.1 �.. ".. ".. �... I. I.I...111-1 ..... . ........ .. ... .. .. ... .. . .. . ............. .......... .... .................. Wrap Sides --in.,_ US LO _-Hf)Pf #4 Stone @ 3.0 i 160 NW Filter V =613.00 BIA-13 Perforations ... .. ... .. .. . ... . .. ..... .. .. .. .. .............. ... ........... .. . ......... . INLET 4A depth. Provide SOLID 4" Solid PVC Outlet Pipe__ .. . .... .. JIthrough depth 4" Perforated PVC Underdrai5in fabric. No fabric ... .. ... .. . . . . . ..... ................. ........ ............. STRUCTURE ---------- ... . f min yar s 0 PIPE SECTION Inv. Out=654.00, Slope=2% I 59' Inv. =654.00, Slope=O% at bottom. D -1A 1,0 i ............... . .... AFTER WEIR 650 stone - I ­..... ­... � ___ -.--.-...1 .................. - .......... 650 3:1 5A PLATE i ........................ .. ... ... ... .. .. . . .. ........ . BMP D DETENTION PIPE DETAILS SCALE: SECTION: 1"=5% SCHEMATIC DRAWING: 1"=25' 10+00 10+25 10+50 10+/5 n A f -F-) 117 nVrPV-NTrPTr)I\T TIDVI\TPTJ DL)r)VTT V SCALE: 1"=10' Horizontal, 1 "=5' Vertical AOGPTqNfo C PV04- NOT TO SCALE BMP D 1 335 330 325 520 515 310 fti: NWRI AY MO WERIAL: 635 TO wx!R 44 ouqmtikq� r tf� 0" Tm?i R F, , DARa Ta - - -------- - Depth ... . .. ........ .... .. ........ . .. .... ... . ..... ...... .. . . .............. �C-7T,12. ....... . ....... ­­­­­ ...... ... ... .. ..... ..... . ............ . . . . .. .. . ...... ­­ ... .... . .. ............. 630 625 ....... .. 00 T M 625 NYLOPLAST HDPE DRAIN PIPE DETAIL NOT TO SCALE BMP D 1 335 330 325 520 515 310 635 630 625 620 615 610 10+00 10+05 STRM PROFILE: STM Dl --D C1 _SCALE. 1"=10' Vertical 615 610 605 600 595 590 0 z;1 10+50 615 610 605 600 595 0090 STORM SEWER PROFILE: _STM 05-05A SCALE: Horizontal, 1"=10' Vertical 640 ------- - ----- 640 635 - --- JQ .............................. ............ ............... . ... ...... .. .... -M-----, ........... ..... ..... . .. . ....... . ..... .................. . ....... 635 - - -------- - Depth ... . .. ........ .... .. ........ . .. .... ... . ..... ...... .. . . .............. �C-7T,12. ....... . ....... ­­­­­ ...... ... ... .. ..... ..... . ............ . . . . .. .. . ...... ­­ ... .... . .. ............. 630 625 ....... .. .. . ...... ........ ..... .. ... - ........... ................ .......................... . . . . . . ....... ..... ....... - --- _-_--_---- ­- ------- ­-­­ . . ..... . ..... ............... . . ......... .... _­­­ ------- 625 620I Ir, PROPOSED---- cf� * ---- I-- ...................................... . . .. ....... . .... ... .......... . ..... . .. .......... .... --- 615 . ... ... . . .... . ........ ...... . . .............. . .. .. . ... ......... . ............ . . ...... ..... ................ 615 3A 6 1 P0 ....... . ....... ........ . ..... t -- +00 LO _-Hf)Pf 10 --- --- 4_11c� ----------- BIA-13 -------- -------- 635 630 625 620 615 610 10+00 10+05 STRM PROFILE: STM Dl --D C1 _SCALE. 1"=10' Vertical 615 610 605 600 595 590 0 z;1 10+50 615 610 605 600 595 0090 STORM SEWER PROFILE: _STM 05-05A SCALE: Horizontal, 1"=10' Vertical 640 MPC ...... .......... . ..... . . ............ __.­ .... ......... .. ... .. ..... ........... 640 635 - --- JQ .............................. ............ ............... . ... ...... .. .... -M-----, ........... ..... ..... . .. . ....... . ..... .................. . ....... 635 630 Depth ... . .. ........ .... .. ........ . .. .... ... . ..... ...... .. . . .............. �C-7T,12. ....... . ....... ­­­­­ ...... ... ... .. ..... ..... . ............ . . . . .. .. . ...... ­­ ... .... . .. ............. 630 625 ....... .. .. . ...... ........ ..... .. ... - ........... ................ .......................... . . . . . . ....... ..... ....... - --- _-_--_---- ­- ------- ­-­­ . . ..... . ..... ............... . . ......... .... _­­­ ------- 625 620I Ir, 620 cf� * ---- I-- ...................................... . . .. ....... . .... ... .......... . ..... . .. .......... .... 620 615 . ... ... . . .... . ........ ...... . . .............. . .. .. . ... ......... . ............ . . ...... ..... ................ 615 3A 6 1 P0 ....... . ....... ........ . ..... t -- +00 .. ..... .. ... . .. ..... ... . . . .......... ....... = ...... .. .. . . .......... . .. ----------- --- ................. . z 10+5 -10 10 _11-1.1- ­­­.­­.___ ...... .. .. .. .. 1-- 615 STORM PROFILE: STM BIA-13 C18) SCALE: 1"=20' Horizontal, V=10' Vertical 635 630 625 620 615 610 605 > 625 620 615 610 605 600 595 590 675 670 665 660 11+ 8�5 645 10+00 10+25 10+50 10+75 NOTE: BMP'S MUST BE INSTALLED ONLY 3 BMP E DETENTION TRENCH PROFILE AFTER ALL UP -GRADIENT GRADING HAS C18 —1'=10' Hor_iz_()ntal, 1"=5' -vertical I BEEN COMPLETED AND AFTER PRELIMINARY STABILIZATION ACHIEVED. PROVIDE SELF -TAPPING SCREWS EVERY 5' TO SECURE FILTER FABRIC. FILTER FABRIC SHALL BE "US 350" GEOTEXTILE, C 630 625 620 615 610 605 "AM21 600 10+00 10+50 r5 STORM SEWER PROFILE: STM 01-03 riR )—SCALE: 1"=20' Horizontal, 1"=10' Verti,-.-al w 11+00 625 620 615 610 605 600 595 590 10+00 10+50 11+00 11+50 12+00 6�STORM PROFILE: STM 04-07 635 630 625 620 615 610 605 10+50 11 STORM PROFILE: STM 02-02A C1 8 J­SCALE-- 1 "-_20' Horizontal, 1"=10' Vertical 635 630 625 620 615 610 605 10+00 SCALE: I"=20' Horizontal, 1"=10' Vertical 635 630 625 620 615 610 5�05 10+ 12 STORM PROFILE: STM A -AIA C 18 SCALE: t"=20' Horizontal, VAO' Vertical MPC ----------- ------ ------- - --- Channel Side -- ---- Depth Depth Width Slope 1 EC -2 Matting .......... 620I Ir, LLJ E cf� * ---- I-- a .. . ....... .. . ........ .......... 620 EC -2 Matting 1.5 . ... ... 8 3:1 3A Rip -Rap ----------- - ---- ---- C ) J1_ -Q_ . _!� � _11-1.1- ­­­.­­.___ ...... .. .. .. .. 1-- 615 EC -2 Matting 1,5 0.92 1^. 1�0_ ........... 5:1 4A EC 2 Matting .... . .. .. ... . - --------- ---------- - ----- - --- ------ - ----------- - EC 2 Matting 1,0 0.30 PROPOSED ..... .... ... ........... - 3:1 5A EC -2 Matting GRADE 605 6 ....... ........ 605 5B EC -2 Matting 1.0 0.38 6 3:1 HDPE @ 6.25% — -------------- ------ — - ------- M Cn Matting 1.0 F .. ...... .. .. ... ... .... .. 3:1 7 - - - - - - - - - - - - - - - - - — - - - - - - - - - - - . ....... ... ....... ...... ... ...... 595 EC -2 Matting 1,0 0.47 6 3:1 k711 I__ > = 1.0 0,53 10+00 ............. ...................... .............. . .. .. ..... ... 10+50 13 ......... . - -- - ---------- PROFILE: STM C -CIA --------Ln ------ - --- ----- CD CD ------------ ------ ----- ------ ----- ---------- --------------- ---- - 600 10+00 10+50 r5 STORM SEWER PROFILE: STM 01-03 riR )—SCALE: 1"=20' Horizontal, 1"=10' Verti,-.-al w 11+00 625 620 615 610 605 600 595 590 10+00 10+50 11+00 11+50 12+00 6�STORM PROFILE: STM 04-07 635 630 625 620 615 610 605 10+50 11 STORM PROFILE: STM 02-02A C1 8 J­SCALE-- 1 "-_20' Horizontal, 1"=10' Vertical 635 630 625 620 615 610 605 10+00 SCALE: I"=20' Horizontal, 1"=10' Vertical 635 630 625 620 615 610 5�05 10+ 12 STORM PROFILE: STM A -AIA C 18 SCALE: t"=20' Horizontal, VAO' Vertical \\ C18 % SCALE: 1"=20' Horizontal, 1"=10' Vertical 630 625 620 615 610 605 600 0 12+ 0 o 5 U JU N SHIMP > .c. w. 4 1 NAL NOTE: CONCRETE INLET SHAPING (IS -1) REQUIRED ON ALL STRUCTURE WITH A 4' OR GREATER DROP AND SAFETY SLABS (SL -1) ON ALL STRUCTURES TALLER THAN 12'. Ditch Sections MPC C A 625 l Channel Channel Side 625 Depth Depth Width Slope 1 EC -2 Matting 1,0 620I Ir, LLJ E cf� * ---- I-- a .. . ....... .. . ........ .......... 620 EC -2 Matting 1.5 . ... ... 8 3:1 3A Rip -Rap 1.0 615 C ) J1_ -Q_ . _!� � _11-1.1- ­­­.­­.___ ...... .. .. .. .. 1-- 615 EC -2 Matting 1,5 0.92 1^. 1�0_ ........... 5:1 4A EC 2 Matting .... . .. .. ... . 0.28 610 3:1 1 610 EC 2 Matting 1,0 0.30 PROPOSED ..... .... ... ........... - 3:1 5A EC -2 Matting GRADE 605 6 ....... ........ 605 5B EC -2 Matting 1.0 0.38 6 3:1 HDPE @ 6.25% 600 600 Matting 1.0 0.36 .. ...... .. .. ... ... .... .. 3:1 7 EC -2 Matting 1.0 595 CD 3:1 . ....... ... ....... ...... ... ...... 595 EC -2 Matting 1,0 0.47 6 3:1 k711 I__ > = 1.0 0,53 10+00 ............. ...................... .............. . .. .. ..... ... 10+50 13 STORM PROFILE: STM C -CIA \\ C18 % SCALE: 1"=20' Horizontal, 1"=10' Vertical 630 625 620 615 610 605 600 0 12+ 0 o 5 U JU N SHIMP > .c. w. 4 1 NAL NOTE: CONCRETE INLET SHAPING (IS -1) REQUIRED ON ALL STRUCTURE WITH A 4' OR GREATER DROP AND SAFETY SLABS (SL -1) ON ALL STRUCTURES TALLER THAN 12'. Ditch Sections Ditch Lining Channel 10 -Yr Flow l Channel Channel Side Depth Depth Width Slope 1 EC -2 Matting 1,0 0.33 6 3:1 2 EC -2 Matting 1.5 0.36 8 3:1 3A Rip -Rap 1.0 0,35 8 4:1 313 EC -2 Matting 1,5 0.92 8 5:1 4A EC 2 Matting 1.0 0.28 6 3:1 413 EC 2 Matting 1,0 0.30 6 3:1 5A EC -2 Matting 1.0 0,23 6 3:1 5B EC -2 Matting 1.0 0.38 6 3:1 EC -2 6 Matting 1.0 0.36 6 3:1 7 EC -2 Matting 1.0 0,42 6 3:1 8 EC -2 Matting 1,0 0.47 6 3:1 9 EC -3 Matting 1.0 0,53 9 4:1 6"