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Home My WebLink AboutWPO201500066 Plan - VSMP Minor Amendment 2017-12-01I SITE DATA OWNER / DEVELOPER: MARCH MOUNTAIN PROPERTIES LLC CONTACT DAVE BROCKMAN 1005 HEATHERCROFT CIRCLE, SUITE 100 OLD TRAIL VILLAGE CROZET VA, 22932 CELL: (702)-985-9088 da ve@old trail viPl age. com PLAN PREPARER: ROUDABUSH, GALE, & ASSOCIATES 914 MONTICELLO ROAD CHARLOTTESVILLE, VA. 22902 (434)-977-0205 TAX MAP PARCEL No: 55E -01 -12 -AI ZONING: NEIGHBORHOOD MODEL DISTRICT IN ACCORDANCE WITH PROFFERS OF ZMA-04-024 APPROVED ON SEPTEMBER 14, 2005 AREA SUMMARIES: LOTS 1.7 Ac. OPEN SPACE 2.2 Ac. RIGHT OF WAY 1.0 Ac. PRIVATE ALLEY 0.2 Ac. LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND DETAILS. NO EVIDENCE OF A BURIAL SITE WAS FOUND ON THIS PORTION OF PARCEL Al. THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE. THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. THIS SITE IS LOCATED WITHIN THE WATERSHED OF A PUBLIC WATER SUPPLY RESERVOIR. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. GENERAL EROSION AND SEDIMENT CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE "VIRGINIA EROSION AND SEIDIEMNT CONTROL HANDBOOK" AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: 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. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDIiCATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAIN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN REVIEWING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSIOIN CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -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 HAS BEEN ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH FUNOFF-PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 11 ROSION CONT OLAND STO MWAT R MANAG M NT LAN X11 __N 1 M NT TO W�• • 1500066 SCALE: 1 "=1000 FEET SI -I EET INDEX SHEET 1 ---------- COVER SHEET SHEET 2 ---------- EROSION CONTROL PLAN PHASE 1 SHEET 3 ---------- EROSION CONTROL PLAN PHASE 1 SHEET 4 ---------- EROSION CONTROL PLAN PHASE 2 SHEET 5 ---------- EROSION CONTROL PLAN PHASE 2 GENERAL CONSTRUCTION NOTES FOR EROSION 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 REGULATIONS yr 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 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 IMMEDIiATELY. 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 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:00 AM TO 9:00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT 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 RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW N ULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE 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 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 160 LBS/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 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAN AGE 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 WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. . . � W -T1 --r �Tl --r� --I' _�r -;r --T- --T -Y� --rT1 - F T7A SHEET 4A -PLAN AMENDMENT O WP0201 WJJAM SHEET 6 ---------- PRE -DEVELOPMENT DRAINAGE AREA MAP SHEET 7 ---------- POST -DEVELOPMENT DRAINAGE AREA MAP SHEET 8 ---------- MODIFIED STORM OUTFALL & POND ROUTINGS SHEET 9 ---------- BMP CONVERSION & OUTFALL CHANNEL SHEET 9A -------- POST -CONVERSION LANDSCAPE PLAN SHEET 10 -------- EROSION CONTROL NOTES & DETAILS SHEET 11 -------- EROSION CONTROL NOTES & NARRATIVE SHEET 12 -------- STREAM BUFFER MITIGATION PLAN SHEET 12A ------ STREAM BUFFER MITIGATION PLAN VIII♦ • • , , , • • T,TH of im ` L. Taggo1 t Lic. No. 22841 v� 1P \�ti fiSS/ONAL ANG 4 }}yy {g P I V)f,i G-0 1, APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNING / ZONNING ENGINEERING INSPECTIONS ARCHITECTUAL REVIEW BOARD FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VA. DEPARTMENT OF TRANSPORTATION 7- ri July 30, 2014 Sept. 29, 2015 Nov, 09, 2015 A Oct. 13, 2017 Nov. 10, 2017 County Comments DATE May 9, 2014 i TOTAL AREA 5.1 Ac. MAGISTERIAL DISTRICT: WHITE HALL MAGISTERIAL DISTRICT DRAINAGE DISTRICT. LICKINGHOLE CREEK WATERSHED: SLABTOWN CREEK TOPOGRAPHY: LOUISA AERIAL SURVEYS, AUGUST 2012 DATUM: VERTICAL - NAVD 88, HORIZONTAL - NAD 83 CRITICAL SLOPES: NO CRITICAL SLOPES EXIST WITHIN THE PROJECT LIMITS. FLOODPLAIN: THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS AS SHOWN ON FLOOD INSURANCE RATE MAP COMMMUNI TY PANEL NUMBER 510006 0237 D. EFFECTIVE DATE: FEBRUARY 4, 2005. EROSION CONTROL: PHASE I EROSION CONTROL PROVIDED BY THE EXISTING SEDIMENT BASIN CONSTRUCTED WITH BLOCK 11 AND EXPANDED WITH BLOCK 14. STORM WA TER: ORIGINAL SWM BIO -RETENTION POND, BLOCK 14, WPO 2012-0013 WET POND BMP (NWS): 0.82 ACRES TOTAL PROPOSED IMPERVIOUSNESS = 10.25 ACRES OR 671'. LANDSCAPING: SEE LANDSCAPING PLAN FOR PLANTINGS, SCHEDULE AND SPECIFICATIONS, NOTES AND DETAILS. NO EVIDENCE OF A BURIAL SITE WAS FOUND ON THIS PORTION OF PARCEL Al. THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE ALBEMARLE COUNTY WATER PROTECTION ORDINANCE. THIS SITE IS NOT LOCATED WITHIN AN AGRICULTURAL -FORESTAL DISTRICT. THIS SITE IS LOCATED WITHIN THE WATERSHED OF A PUBLIC WATER SUPPLY RESERVOIR. GENERAL CONSTRUCTION NOTES FOR STORMWATER MANAGEMENT PLANS 1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNICAL ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS. 2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES. 3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR. GENERAL EROSION AND SEDIMENT CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE "VIRGINIA EROSION AND SEIDIEMNT CONTROL HANDBOOK" AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: 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. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDIiCATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAIN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN REVIEWING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSIOIN CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN REVIEWING AUTHORITY. ES -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 HAS BEEN ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH FUNOFF-PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY. 11 ROSION CONT OLAND STO MWAT R MANAG M NT LAN X11 __N 1 M NT TO W�• • 1500066 SCALE: 1 "=1000 FEET SI -I EET INDEX SHEET 1 ---------- COVER SHEET SHEET 2 ---------- EROSION CONTROL PLAN PHASE 1 SHEET 3 ---------- EROSION CONTROL PLAN PHASE 1 SHEET 4 ---------- EROSION CONTROL PLAN PHASE 2 SHEET 5 ---------- EROSION CONTROL PLAN PHASE 2 GENERAL CONSTRUCTION NOTES FOR EROSION 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 REGULATIONS yr 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. 3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. 4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES. 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY. 7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE. 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 IMMEDIiATELY. 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 13-301 OF THE CODE OF ALBEMARLE. 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE HOURS OF 7:00 AM TO 9:00 PM. 15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE. 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT 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 RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET. STRAW N ULCH IS TO BE APPLIED AT 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE 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 90 LBS/1000SF. INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT 1000 LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL BE APPLIED AT 160 LBS/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 80 LBS/100SF. ALTERNATIVES ARE SUBJECT TO BE APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR. 19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAN AGE 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 WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY. 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR. . . � W -T1 --r �Tl --r� --I' _�r -;r --T- --T -Y� --rT1 - F T7A SHEET 4A -PLAN AMENDMENT O WP0201 WJJAM SHEET 6 ---------- PRE -DEVELOPMENT DRAINAGE AREA MAP SHEET 7 ---------- POST -DEVELOPMENT DRAINAGE AREA MAP SHEET 8 ---------- MODIFIED STORM OUTFALL & POND ROUTINGS SHEET 9 ---------- BMP CONVERSION & OUTFALL CHANNEL SHEET 9A -------- POST -CONVERSION LANDSCAPE PLAN SHEET 10 -------- EROSION CONTROL NOTES & DETAILS SHEET 11 -------- EROSION CONTROL NOTES & NARRATIVE SHEET 12 -------- STREAM BUFFER MITIGATION PLAN SHEET 12A ------ STREAM BUFFER MITIGATION PLAN VIII♦ • • , , , • • T,TH of im ` L. Taggo1 t Lic. No. 22841 v� 1P \�ti fiSS/ONAL ANG 4 }}yy {g P I V)f,i G-0 1, APPROVALS DATE DEPARTMENT OF COMMUNITY DEVELOPMENT PLANNING / ZONNING ENGINEERING INSPECTIONS ARCHITECTUAL REVIEW BOARD FIRE RESCUE ALBEMARLE COUNTY SERVICE AUTHORITY VA. DEPARTMENT OF TRANSPORTATION 7- ri July 30, 2014 Sept. 29, 2015 Nov, 09, 2015 A Oct. 13, 2017 Nov. 10, 2017 County Comments DATE May 9, 2014 i FILE NUMBER 5053 II SHEET 1/14 t !0 CL Uj .d LO D Cc 0 00 0 wu s J F0 00 FILE NUMBER 5053 II SHEET 1/14 i► M ! ; Sept.r ov. 09 DATE May 9, 2014 SCALE 1 = SO° CONTOUR INTERVAL 2 Feet E FILE NUMBER 8053 SHEET 2/14 CL J2 cow z Q UJ Z W > 06 Lo z F J W Lu d "z W 0 L r 00 J U) 00- w E FILE NUMBER 8053 SHEET 2/14 AL SEDIMENT TRAP SIZING DESCRIPTION STI DA 3.0 AC. WET VOLUME 201 CY DRY VOLUME 201 CY REQUIRED VOLUME 402 CY SIZE (W) 38 FT (L) 76 FT (D) 4.0 FT OUTLET LENGTH 18 FT PROVIDED VOLUME 428 CY BOTTOM TRAP EL 636.00 WETVOL. EL 637.86 DRY VOL, EL 639.70 TOP OF BANK 64.0.00 i SEDIMENT TRAP SIZING w DESCRIPTION ST 2 DA 3.0 AC. WET VOLUME 201 CY DRY VOLUM E 201 CY REQUIRED VOLUME 402 CY SIZE (W) 38 FT (L) 76 FT (D) 4.0 FT OUTLET LENGTH 18 FT PROVIDED VOLUME .428 CY BOTTOM TRAP EL 636.00 MET VOL. EL 631.88 DRY VOL. EL 633.76 TOP OF BANK 634.00 REVISIONS July 1 201 . ov. I<'- gnil DATE May 9, 2014 SCALE 00@ CONTOUR INTERVAL 2 Feet FILE NUMBER 8053 SCALE I" = 30' 30 15 0 30 60 SCALE IN FEET r SHEET 3/14 CL If t 06 '� • i w •s 4 t u o 00 00 FILE NUMBER 8053 SCALE I" = 30' 30 15 0 30 60 SCALE IN FEET r SHEET 3/14 DATE may 9, 2014 SCALE 30° CONTOUR INTERVAL 2 Feet rel i �f � cq f • LU w ff .« i • •sLU a cc Ujf N oo 91 4 l♦ 1 ' . r 00 of tcm to • 1 S • cc i•• at ' 0(4 LU j cc 1 1 1 • 24 k f •• • Uj LU 0 DATE may 9, 2014 SCALE 30° CONTOUR INTERVAL 2 Feet RILE NUMBER 8053 SHEET 4/14 cq LU od i •sLU 1: N o l♦ 00 RILE NUMBER 8053 SHEET 4/14 ' REVISIONS Oct. 13, 2017 AMEW0NENTTD Nov. 1O.2O17 County Comments 100—YR POST � 0 LU Type U X to N 9.14 O'OOO in ofs |o/P Interpolation: ' On 3ubonro Dovvnatroorn Area CN Tc Tt Name Subareas (oorn) (min) /rnin\ CL DA—PD3T10OYR N//..4 15�O . O5 15OO 1�OO ' ' cc 4 Computed Results: 22841 cis 08 C14 Peak Discharge /Qp\' ` /' 00) cfo LU C� 12 ZO ' hro .............. Runoff Volume: 5.85 (00 0 LL LU Col LL:: 0 C%j .0 cc rz P 9 nz itz,- Uj LU CL ' REVISIONS Oct. 13, 2017 AMEW0NENTTD Nov. 1O.2O17 County Comments 100—YR POST � Input Data: ' Rainfall Distribution Type: Type U Rainfall Depth: Base Flow' ' 9.14 O'OOO in ofs |o/P Interpolation: ' On 3ubonro Dovvnatroorn Area CN Tc Tt Name Subareas (oorn) (min) /rnin\ DA—PD3T10OYR N//..4 15�O . O5 15OO 1�OO ' ' L. Jaggart Computed Results: 22841 Peak Discharge /Qp\' ` /' 11O.255 cfo Time to Peak: 12 ZO ' hro .............. Runoff Volume: 5.85 acre—ft IL �� FILE NUMBER 8053 Im ••i 655 650 645 ZM 635 630 625 AMENDED BMP CONVERSION FOR WPO201500066 10+00 1�i OOH U-)00 C6 C4 t V) -J W co 11 Co (0 D_ +20 +40 +60 +80 11+00 +20 LO Ln 4- C', CS! i- r -i Cd __J r� c6 -i K) D n re) --J to to --J W (0 0 (0 W LL W to LL +40 +60 +80 12+00 +20 +40 +60 +80 NOTE: 9VAC2"70-98 FLOODING. .9VAC2"7"7 STREAM CHANNEL EROSION. Step 3 Determine t1he appropriate development situation. The existing conditions include a sediment basin that currently outfalls into b. Adequacy of all channels and pipes shall be verified in the following manner: the downstream CREST = 9 48.00 I TC I P OF DAM 649.50 a two-year storm to adequacy of the downstream channel includes the routed values of the verify that stormwater will not overtop channel banks nor cause erosion of channel original approved WP0201500066, which can be found on sheet 11/14. bed or banks. development site shall These approved routed values that the channel is currently experiencing Q2YR PRE -DEVELOPMENT = 25.26 CFS are used in the stream erosion and flooding calculations shown hereon this Q2YR POST -DEVELOPMENT = 2.34 CFS Sheet' Q10YR PRE -DEVELOPMENT (SEE DESIGNIDETAiLS) I acres Q10YR POST -DEVELOPMENT = 18.2.3 CFS VADCRSWPP Q10YR POST -DEVELOPMENT = 18.23 CFS :< EVENTS FOR AMENDED BMP CONVERSION FOR WPO201500066 Performance Based Water Quality Calculation Procedure LBMP EVENT INFLOW (CFS) ROUTED (CFS) ELEVATION (FT)_Locality: Project: Old Trail Village Amendment for WP0201500066 Albemarle Co. and livatershed 0-\/Q 35 13 234 646.41 Date: 'II/I012017 8:48 LiA EXISTINIG STORM OUITFALLS Lrenjoleclitotal _ Lten.ov-dBmt,1 4BIMP-1 (Equation 5 25) I I wliere: v relative pre -dei total phosphorous load (POLUKis Per year) I Elev(Ft) Storage(CF) Storage(CY) ------ 12' G�ASS LINED $PILLWAY Total Pounds per year removed Existiiig sit, impa where: EFF requ�ed pollutant removal efficiency 635.000 0.000 0.000 0,000 370.227 park�ing lot 17.08 1 Total Pounds femo�ed M WITHIN rROPOSED FTREBAY A applicable area (acres) I t I 524.892 1 1 M roadway = 1 1 =648.501 0.000 acres 638.000 2759.206 102.193 0.063 1598.523 1,pre(exiting) _ [0.05 _ (0.009 x 0% x 15.30028 x 2.28 Performance Based Water Quality Calculation Procedure 640.000 7134.957 I-— 0.164 2832.259 0 FZ 1 3:1 s.t. or 0.000 0.000 acres �P()Ulids per year 642.000 14282.132 528.968 0.328 4356.811 s.f. or �S.f acres Project: Old Trail Village Amendment for WP0201500066 644.000 24715.908 915.404 0,567 6112.829 or 0.000 acres Locality: Albemarle Co. A 20' Old 1' DEEP #3 STONE 2 3" ORIFI = 644.50 0 0 < 3:1 1 WEIR TOP= 6421.25 2 1 3" ORIFI = 643.50 0 0 1 0 2 3$Y ORIFI 642.50 d , X-2 WET POND A W 642,50,_', n 3,1 J 7777 7,z ------- Au Di t 10+00 1�i OOH U-)00 C6 C4 t V) -J W co 11 Co (0 D_ +20 +40 +60 +80 11+00 +20 LO Ln 4- C', CS! i- r -i Cd __J r� c6 -i K) D n re) --J to to --J W (0 0 (0 W LL W to LL +40 +60 +80 12+00 +20 +40 +60 +80 NOTE: 9VAC2"70-98 FLOODING. .9VAC2"7"7 STREAM CHANNEL EROSION. Step 3 Determine t1he appropriate development situation. The existing conditions include a sediment basin that currently outfalls into b. Adequacy of all channels and pipes shall be verified in the following manner: the downstream channel (Slabtown Branch). For practical design hydrologic characteristics, including, but not calculations, the pre -development conditions used for analyzing the (2) (a) Natural channels shall be analyzed by the use of a two-year storm to adequacy of the downstream channel includes the routed values of the verify that stormwater will not overtop channel banks nor cause erosion of channel original approved WP0201500066, which can be found on sheet 11/14. bed or banks. development site shall These approved routed values that the channel is currently experiencing Q2YR PRE -DEVELOPMENT = 25.26 CFS are used in the stream erosion and flooding calculations shown hereon this Q2YR POST -DEVELOPMENT = 2.34 CFS Sheet' Q10YR PRE -DEVELOPMENT Q2YR POST -DEVELOPMENT = 2.34 CFS :9 Q2YR PRE -DEVELOPMENT = 25.26 CFS acres Q10YR POST -DEVELOPMENT = 18.2.3 CFS VADCRSWPP Q10YR POST -DEVELOPMENT = 18.23 CFS :< EVENTS FOR AMENDED BMP CONVERSION FOR WPO201500066 Performance Based Water Quality Calculation Procedure LBMP EVENT INFLOW (CFS) ROUTED (CFS) ELEVATION (FT)_Locality: Project: Old Trail Village Amendment for WP0201500066 Albemarle Co. and livatershed 0-\/Q 35 13 234 646.41 Date: 'II/I012017 8:48 co LO 1`11 00 (7; C4 4 (OCOU (0 13+00 +20 +40 +60 +80 to N (o 14+00 +20 LO +40 +60 9VAC2"70-98 FLOODING. Worksheet No. I Step 3 Determine t1he appropriate development situation. A = appkable area (acres) A. Downstream properties and waterways shall be protected from damages from localized flooding due to changes in runoff rate of flow and hydrologic characteristics, including, but not limited to, changes in volume, velocity, frequency, duration, and peak flow rate of stormwater runoff in accordance with the minimum design standards set out in this section. equal to ffie average laixl cover condition (1waterstied) and die, proposed improvements N -will create a total percent 0.01 B. The 10 -year postdeveloped peak rate of runoff from the development site shall not exceed the 10 -year predeveloped peak rate of runoff. RR = - 2.8 1.6 L_,I:ULP X (Lquation 5-24) CL RR= 1 21 �21 :]potuids per year Q10YR PRE -DEVELOPMENT = 28,81 CFS 15.30 acres Q10YR POST -DEVELOPMENT = 18.2.3 CFS RR = Q10YR POST -DEVELOPMENT = 18.23 CFS :< Q10YR PRE -DEVELOPMENT = 28.81 CFS LBMP M 9=30 1 655 650 645 640 635 0% 625 +80 15+00 DESIGN PARAMETERS Outflow Total Discharge: Maximum Water Surface Elevation: Tailwater Elevation-, Detention Base Elevation: Outlet #1: Riser, Drop Pipe Riser Top Elev: Riser Base Elev: Riser Diameter: Orifice Coefficient: Weir Coefficient: Culvert Length: Culvert Diameter: Culvert Invert Out: Culvert Friction Coefficient: Culvert Entrance Loss Coefficient: Discharge: Outlet #2: 01, Orifice Shape: Diameter: Invert Elevation: Coefficient: Number of Openings: Discharge: Velocity: Outlet #3: 02, Orifice Sha e: Diameter: Invert Elevation: Coefficient: Number of Openings: Discharge: Velocity: Outlet #4: 03, Orifice Shape: Diameter: Invert Elevation: Coefficient: Number of Openings: Discharge: Velocity: Outlet #5: Grass Emergency Spillway, Weir Shape: Side Slope Ratio (V: H): Crest Length: Invert Elevation: Coefficient: Number of Openings: Discharge: Velocity: Outlet #6: Forebay #3 Stone Weir, Weir Shape: Crest Length: Invert Elevation: Coefficien t. Number of Openings: Discharge: Velocity: 10 -YR 63.00 18.23 647.91 post -development iii.4)ervious cover (Pereent expressed fit whole numbers) Worksheet No. I Step 3 Determine t1he appropriate development situation. A = appkable area (acres) Determine the relative pre -development pollutant load (Lp,,). The site itilbntiiafiondeterniiied ni STEP I and STEP'?- provide enotigh itilbrmationto deterniie the appropriate 100 -YR 118.26 96,05 648.84 ATYo'PB.',,p draiinage area to proposed B -.%-IP (acres) poitrids per year ft Based on Existing impervious Cover Determine the relative pollutant removal mcluirement (RR), LB�Ny =[0.05+(0_00)9x 67% A 21 15.30 x 2.28 equal to ffie average laixl cover condition (1waterstied) and die, proposed improvements N -will create a total percent 0.01 4. Calculate flie poaTtant load removed tbythe proposed B-NIP(s): iii1pe2'1' ious Cover (1post) is less than or equal to &_- average knid cover condition (lwatershed). Step I Determine the applicable area (A) and the post -developed impervious cover ([post). I Lpre(existing) _ [0.05 -' (0.009 x lz )JxAx?.28 (Equation5-16) POST F67% _ L, atershed RR = - 2.8 1.6 L_,I:ULP X (Lquation 5-24) CL RR= 1 21 �21 :]potuids per year Applicable area (A) = E- 6664801s.f. or 15.30 acres t0 the average land cover coridition (1wateashed) aild die proposed irupro-venients will create a total percentE%�,Ip RR = FOREBAY STAGE STORAGE RIZ = ?'}.8 6,8 LBMP L0 RR= 16.01 pounds per year #VVW LJL and livatershed Use RR --1 %01 :](lesser vallis) Pounds per year rerno�ed S. Calcitlate load the total pollutmit reiiio)ved by the B1\11`(s)': No Situation 3: This consists of land dv,,elopineat where the existing percent ili4)erviom cover is gi,cater thanSten 7 ldentil}, best management practice (131NIP) forthe site. Lrenjoleclitotal _ Lten.ov-dBmt,1 4BIMP-1 (Equation 5 25) the average 1wid cover condition (hvatershed). 02 W wliere: v relative pre -dei total phosphorous load (POLUKis Per year) I,W'Ise Elev(Ft) Storage(CF) Storage(CY) Storage(Acre-Ft) Area(SF) Post -development impervious Cover: structures = 0,000 Total Pounds per year removed Existiiig sit, impa where: EFF requ�ed pollutant removal efficiency 635.000 0.000 0.000 0,000 370.227 park�ing lot 17.08 1 Total Pounds femo�ed s.f or s.f. or 10,250 acres acres A applicable area (acres) VA DCR SWPP 446490 636.000 524.892 19,440 0.012 695.183 roadway = S.f or 0.000 acres 638.000 2759.206 102.193 0.063 1598.523 1,pre(exiting) _ [0.05 _ (0.009 x 0% x 15.30028 x 2.28 Performance Based Water Quality Calculation Procedure 640.000 7134.957 264.258 0.164 2832.259 other s.t. or 0.000 0.000 acres �P()Ulids per year 642.000 14282.132 528.968 0.328 4356.811 s.f. or �S.f acres Project: Old Trail Village Amendment for WP0201500066 644.000 24715.908 915.404 0,567 6112.829 or 0.000 acres Locality: Albemarle Co. WET POND STAGE STORAGE Elev(Ft) Storage(CF) Storage(CY) Storage(Acre-Ft) 633.000 0.000 0.000 0.000 634.000 3933.768 145.695 0.090 636.000 14357.925 531.775 0.330 638.000 28571.317 1058.197 0.656 640.000 47030.115 1741.856 1.080 642.000 70190,597 2599.652 1.611 644.000 98508.959 3648.480 2.261 AMENDMENT TO WP0201500066 NOTES: 1. ALL DRAINAGE AREAS FROM THE APPROVED PLAN WP0201500066 WILL REMAIN UNCHANGED. 2. SWM CALCULATIONS WERE GENERATED FROM DESIGN PARAMETERS DETERMINED IN THE APPROVED PLAN WP0201500066. 3. ALL OTHER DESIGN PARAMETERS EXCEPT THE NOTES AND DETAILS SHOWN HEREON THE AMENDED SECTIONS OF WP0201500066 (SUCH AS EROSION CONTROL PLAN, LANDSCAPE PLAN, ETC.) ARE TO REMAIN UNCHANGED AND SHALL ADHERE TO THE APPROVED PLAN WP0201500066, Total = 446490 s.f. or 10,250 acres 1,0,t = (total post -development finperviotis ccwer � A) X 100 Area(SF) Step 2 Determbie the average Land cover condition or the existing impervious cover 3535.442 4339.502 Average land cover condition 6120.208 If the locality has determined land cover conditions for iudMdual watersheds vithin its 8126.622 jinisdiction, tise the watershed specific value deterniiiied by the locality as 1watershed, 10363.20(6 12821 otlierrvise, Ilse the C liesapeak-e 113ay default value: lvatenh'ei 16o,'o k.LquatiouS-16) Date: 10 -Nov -i7 Situation I.Norksheet No, 2 where: relafiVe Pie-developinerit total phosphorous load (pounds per year) v,,a-_e- land co% t�rcondiiion for �pecifi� �,� atershed or locality or t1le Cbe�[geake Bay &fxalt -value of 16`,'� (perceitt e.�pnss-_d iri whole inmbers) Sulluilary ofSituatioli 2 ciiteria� ti-om c,dciflation procedure STEP I thra STEP 3. Worl"sheet I A = applicable area (acres) Area= 15.30 ac. J post- Eff [6.665+ (0009 16C/1) x 15.30028 x 2.28 1 i�,ar�ished= 16% I ZilSIY` of 17�6.77 potuids per year 2. Select BNIP(s) liom Tabte 5,44 wid locate on the site: Determine the relative post -development pollutant load (T,_t). Drainage impervious TNJ pe EEfficiency Area (s.f.) Area f1s.f.) Description: BMP 1: /1 of W_ _ B Nt P A LP -1t = [U5 + (0,009 x 1,,,t)] x A x 2.28 (Equation i-21) 75 64613 3. Detertike the POIlUtaTit load enterhig, Ithe proposed BNIP(s): T I_ A 187.5724 cfs 649.50 ere. Po, -, t re 7epost-ucNe&)piiieiittc)ttipi)ospiiuiutL'� a kpowidsper vear) LB-AIP = (0.05+(0.009x1 -x A 2 -2 8 (E quation,5-23) ft post -development iii.4)ervious cover (Pereent expressed fit whole numbers) ft Step 3 Determine t1he appropriate development situation. A = appkable area (acres) where: 4P.M11 = relaitive post-developm.ent total phospliorous toad entering proposed B.1IP ou,nds per year) The site itilbntiiafiondeterniiied ni STEP I and STEP'?- provide enotigh itilbrmationto deterniie the appropriate 60.00 13NP (pereciite.xl)ressediiwilc)leiiiniibers) de-,,-etopiip-i-it;sitLiatioiiiiiicierwlichtl-&pei-fonimiicecriTeria��,,iflEil.)p�,, Cbeck( )tlieipliropriatede�,eelopiiietitsitLiatic)iiasfoRo-,vt-,: Lpest [0,05 (0�009 X 67% x 15,30028 Y 2.28 ATYo'PB.',,p draiinage area to proposed B -.%-IP (acres) poitrids per year ft Na Situation 1: Tliis consists of laixi development where the c?Jsting percent iritpei-vious cover is less tlian or Std Determine the relative pollutant removal mcluirement (RR), LB�Ny =[0.05+(0_00)9x 67% A 21 15.30 x 2.28 equal to ffie average laixl cover condition (1waterstied) and die, proposed improvements N -will create a total percent 0.01 4. Calculate flie poaTtant load removed tbythe proposed B-NIP(s): iii1pe2'1' ious Cover (1post) is less than or equal to &_- average knid cover condition (lwatershed). RR = Lpost (0-9 X Lpre(zSistin,_A) 3: POST F67% _ L, atershed RR = - 2.8 1.6 L_,I:ULP X (Lquation 5-24) CL RR= 1 21 �21 :]potuids per year Situation 2: o is cover (lesiqiru) is less fl-ian or equal TlAs coirsists of linxi development where flie e.,cistitig. percerit 4ei-6 L or Lr-,,,i po3t- develc�prncut totall phosphoroas loud removed by proposed 131,41? (pouiids per -year) t0 the average land cover coridition (1wateashed) aild die proposed irupro-venients will create a total percentE%�,Ip RR = 161'/0 RIZ = ?'}.8 6,8 LBMP L0 RR= 16.01 pounds per year #VVW LJL and livatershed Use RR --1 %01 :](lesser vallis) Pounds per year rerno�ed S. Calcitlate load the total pollutmit reiiio)ved by the B1\11`(s)': No Situation 3: This consists of land dv,,elopineat where the existing percent ili4)erviom cover is gi,cater thanSten 7 ldentil}, best management practice (131NIP) forthe site. Lrenjoleclitotal _ Lten.ov-dBmt,1 4BIMP-1 (Equation 5 25) the average 1wid cover condition (hvatershed). 02 W .crLrmo: I,W'Ise Detemfie the reclt&ed pollutant removal efficlenev for the site: "Alere: L.,m,r3-1Aq = total pollutwit load remo\,ed by proposed B-NiPs (pounds per year) is -served byan, jri Situation 4: -Ms consists of land de-velopment where the exastitig percent iiiipervi0lis cover--a'Pollutant EFF = (RR + Lp,,,, ) x 100 (Equation 52) load removed by proposed B_I\IP No. 1, Equation 7-24 e.xisatig storinwater mat o geinent BMP(s) that addresses water qriality, TM Total Pounds per year removed where: EFF requ�ed pollutant removal efficiency 0 N If the proposed dewlopment ineets the criteria for development Situation I RR = pollutant removal requirement (potiT is per year) � 6. Verify eomphnce: re€froze paint > IxR thwi the low cffensdty develbpinent is considered to be the HNIP and no pollutant removal is recliiie& L1103t rclati ,c post -development total phobphorotrs load, Equadoti 5-21 (poluids per year) 17.08 1 Total Pounds femo�ed The calculatio.'ai procedure for Situation I stops here. Ifflia proposed development riteets the criteria for development 0. per year Req'd Remo\/al= 16.01 Total Pounds per year removed Situations 2, 3, oral, then pioceed to STEP 4 on fle appropriate worksheet. EFF 22.7-8 x I 00= 70% E7T6 0-1 ] OK Femovul Rz�',O Exceedend 187.5724 cfs 649.50 ft 632.00 ft 0.00 ft 648.00 ft 633.50 ft 60.00 in 0.60 3.33 120.00 ft 36.00 in 632.75 ft 0.01 0.10 133.64 cfs Circular 3.00 in 642.50 ft 0.60 2 1.24 cfs 12.62 ft/s Circular 3.00 in 643.50 ft 0.60 2 1.15 cfs 11.67 ft/S Circular 3.00 in 644.50 ft 0.60 2 1.04 cfs 10.63 ft/S Trapezoidal 6.00 12.00 ft 648.50 ft 3.33 50.51 cfs 4.15 ft/s Rectangular 20.00 ft 642.25 ft 3.33 1 0.00 cfs 0.00 ft/S AY,T H 0 Jing rn L. Taggart 17ILic. No. Q_ 22841 lllll� 'S./ONAL U1 REVISIONS Oct. 13,2017 AMENDMENTTO A WP02015life Z� Nov. 10, 2017 County Comments DATE ,October 13, 2017 SCALE 1 20' CONTOUR INTERVAL 2 Feet FILE NUMBER 8053 SHEET 4B C\1 Z �Z W Zw iL 3: < Z CL 06 25 06 > oz� 0 J L0 0 0 #VVW LJL 1� 0 W Z X (0ir 02 W 0 0 OJ Lo 0 Z 0 TM 0 N 0 00 0. -J 0 LU FILE NUMBER 8053 SHEET 4B rA SAFETY FENCE P�VEOCON3TRUCT0N ENTRANCE WITH WASH RACu CONSTRUCTION ROAD STAB|L|LAT0N SILT FENCE DIVERSION GED|MENTTRAP (�B)LL3 SEDIMENT BASIN ROCuCHECuDAMS MODIFIED CHECoDAM 0)p W/SILT FENCE -----' c8EEDETA|L� TS TEK8pORARYSEED|Nu PS PERKXANENT8EED|NU MULCH mi Source: Va. DSWC Per Acre Per iu(k sq, Straw or Hay k - 2 Eoml, 70 - 90 [bsFree from %yeeds arid coar�e I torl's for Spread with mulch blo�vor Nvrirltercover) Or hy hand. Fiber Mulch Kfinimmn 35 Do not use a, mulch for dry period,,' Apply a,s 1crigilis, Air-drjcd, Do not with rlml,01 Hower or by Wood Chips 4 6 tons IM 275 Ihs, [,'rec of coarse matter, Air- 00 r1itro,gen. per Ion" Du rl,ot use ill flne oiff are Apply 00 Willi mu�ch blowcr, Chip dricd, Do no! use in fim� Shredded turf arew, Apply wilb or by h1arld. SAFETY FENCE P�VEOCON3TRUCT0N ENTRANCE WITH WASH RACu CONSTRUCTION ROAD STAB|L|LAT0N SILT FENCE DIVERSION GED|MENTTRAP (�B)LL3 SEDIMENT BASIN ROCuCHECuDAMS MODIFIED CHECoDAM 0)p W/SILT FENCE -----' c8EEDETA|L� TS TEK8pORARYSEED|Nu PS PERKXANENT8EED|NU MULCH mi Source: Va. DSWC FILE NUMBER 8053 SHEET 5/14 00 00 FILE NUMBER 8053 SHEET 5/14 lu Christopher C. Mulligan UcmNu o�72 , 002-^/«w^L REVISIONS Sept. 29, 2015 Nov. 09, 2015 FILE NUMBER 8053 � SHEET 6/14 CL 00 06 W2 Z UJ x L01 FILE NUMBER 8053 � SHEET 6/14 REVISIONS . t. f- i• HATE I Oct. 8, 2014 SCALE 1 " = 50` CONTOUR INTERVAL 2 FEET r - f III cm ti C f (10 cc Ill 00 A r .. LLI 08 s 00) f04 . , ,. 0 w < IX . 0 LL LL uj o •s • a ,. 0 .0 %a a REVISIONS . t. f- i• HATE I Oct. 8, 2014 SCALE 1 " = 50` CONTOUR INTERVAL 2 FEET FILE NUMBER 80358 SHEET 7/14 r - r III W ti C .` s L 0 w < IX • a 0 fi C FILE NUMBER 80358 SHEET 7/14 GA Inv =644.75 3" Weir 645.00 LL=20° 3,000 psi Concrete 675 670 655 650 645 640 F( BOTI 635 625 4+00 CONCRETE RETAINING WALL NOT TO TYPICAL SECTION Airz Al A3 A5 65 5 6115 10+60 DI -38 i ( kiE_�.7) 111 9 L= 8' 79T R T&I I on a 7 M -W&T, I z FOREBAV Stabilizatio 611 of 1131k. I,-) 1 12 Top Wall 15 16c,. 0 -20' 645.00 0 n 0 -3C STORM Air Entrained 114,,, #14(OUTFALL) + L=2.5' A.V. Device 3,000 psi Concrete L=2.5' L=4' r - W Ln NO. 4 BARS @ C. \, I o. _�L680 FO AY 22 L= 8' VERTICAL AND NTAL + z co + F ROP S\ CENTER OF WALL ON 60" Water Tight RCP Riser A VARIABLE S UJ CQ nq- 0 +(0 0� 0'- (0 0 0 0, - 0 < LLJ MAX. CU WET PO Top= 650.0 __j --j 675 irm Pipe Outf ails Below C) Z 0 :7 11 0 - < F -C\ < 0C F- 4 0 F- 0+ 0 LO + r, N (D 0 + V) o VARIABLE SLOPE F- < 0) < o� R T. III POND U -) :z MAX. = 4:1 C) o 24.89 301 @ zr- 0 X Ld 4' Max. 1BA PROPOSED GRADE 0+50 etention Basin SE 6 11 Conversion 5.00 (00 F=+ (2) 3" Orif 3" ONI' i @ lriv.=647.00 i Inv.=646.00 + 0 0 it < a < #4 @ 12" O.C. W ET POND 0 0 r vided 72,699 VERTICAL AND HORIZONTAL (2) @,) 0 0 2'-0" LLJ F__ --j (f) j A NWSE=645.00 30" HDPE p A- Top Footing 35.00 i @ lnv.=645.00 W D b V, II 20' of 3" Retan 7nu ular, 645 Q 0 AT U) 0, 1 1 \ j Invert -644.75 V-6" 0 0 z F b" ore a'U' V0Iur'h`e_.:Pf vided 14,062 c.f. ry E5 0 4" /_0 -J_ Z-13" COMPACT BGRADE NO. 4 B 12" O.C. 0. 4 BA 12 @ 12) NO. 4 L DOWELS @ 12" O.C. 675 670 655 650 645 640 F( BOTI 635 625 4+00 CONCRETE RETAINING WALL NOT TO TYPICAL SECTION Airz Al A3 A5 65 5 6115 10+60 DI -38 i ( kiE_�.7) 111 9 L= 8' 79T R T&I I on a 7 M -W&T, I z SC TOP Bf:-RM=652.50 Grass Lined SPILLWAY lnvert=651.50 'Existing Berm & Soils to be Ta, by Geo -Tech p1or to Construe Modify Dam Re -Construction e Re ablish Propose Wet to Es Pond as Es BM Pomp - CD 4- LL_ ry uy- '911111111K "111111W M ^4-- (o 20 1 10 -..a 20 40 0 SEE- INSERT SEETS 4A, 4B, -0 LL1 :3 0 C-4 & 4C FOR DESIGN F- 0 KALE IN FEET AMENDMENT TO >: 0 ':�;r z W?0201500066 DA4 TED R..� 10+80 11+00 11+20 11+40 11+60 11+80 12+00 12+20 12+40 12+60 12+80 OCITOBIER 13, 20TY" LAST 13+60 REVISED NO VEPY16ER 10, 685 2017. 14 LL' F - 13+e FOREBAV Stabilizatio Ml- of 1131k. I,-) 1 12 & 15 16c,. 0 -20' cal Scale: 1 =5 0 n 0 -3C STORM SEWER 114,,, #14(OUTFALL) + L=2.5' A.V. Device =5 L=2.5' L=4' r - W Ln TtbM 130 638 = \, I DPE, _�L680 See Detail 22 L= 8' L=4.7' 8 + z co + F ROP S\ V) 60" Water Tight RCP Riser A z W UJ CQ nq- 0 +(0 0� 0'- (0 0 0 0, - 0 < LLJ 7 11 77 ir� Top= 650.0 __j --j 675 irm Pipe Outf ails Below C) Z 0 :7 11 0 - < F -C\ < 0C F- 4 0 F- 0+ 0 LO + r, N (D 0 + V) o U) i� F- < 0) < o� R T. III POND U -) :z 77!! C) o 24.89 301 @ zr- 0 X Ld F- 1BA Z < N 0 (D 0 0+50 etention Basin SE 6 11 Conversion 5.00 (00 F=+ (2) 3" Orif 3" ONI' i @ lriv.=647.00 i Inv.=646.00 + 0 0 it < a < 14 W ET POND 0 0 r vided 72,699 C J. (2) @,) 0 0 __J Fy LLJ F__ --j (f) j A NWSE=645.00 30" HDPE p U) (2) 3" Orif i @ lnv.=645.00 W D V, II 20' of 3" Retan 7nu ular, 645 Q 0 z 0 U) 0, 1 1 \ j Invert -644.75 > 0 0 z F b" ore a'U' V0Iur'h`e_.:Pf vided 14,062 c.f. ry E5 0 /_0 -J_ SC TOP Bf:-RM=652.50 Grass Lined SPILLWAY lnvert=651.50 'Existing Berm & Soils to be Ta, by Geo -Tech p1or to Construe Modify Dam Re -Construction e Re ablish Propose Wet to Es Pond as Es BM Pomp - CD 4- LL_ ry uy- '911111111K "111111W M ^4-- (o 20 1 10 -..a 20 40 0 SEE- INSERT SEETS 4A, 4B, -0 LL1 :3 0 C-4 & 4C FOR DESIGN F- 0 KALE IN FEET AMENDMENT TO >: 0 ':�;r z W?0201500066 DA4 TED R..� 10+80 11+00 11+20 11+40 11+60 11+80 12+00 12+20 12+40 12+60 12+80 OCITOBIER 13, 20TY" LAST 13+60 REVISED NO VEPY16ER 10, 685 2017. 14 LL' F - 13+e FOREBAV GRADE GRADE Ml- J:IN E FINISHED GRADE GRADE ol V6 umd V`Yqt?Q I 1 0 _69,( 16c,. 0 -20' cal Scale: 1 =5 0 n 0 -3C STORM SEWER PROFILE #24 #14(OUTFALL) + L=2.5' Scale: 1' =5 L=2.5' L=4' r - W Ln TtbM 130 638 = \, I DPE, _�L680 A 22 L= 8' L=4.7' 8 + z co + 0 - < Cf) + V) _00 X F-- (f) CDC + ch (D(D- UJ CQ nq- 0 +(0 0� 0'- (0 0 0 0, - 0 < LLJ 7 11 77 ir� 0-) __j --j 675 00 0 z. 1 0 E2 C) Z 0 :7 11 0 - < F -C\ < 0C F- 4 0 F- 0+ 0 LO + r, N (D 0 + V) o U) i� F- < 0) < o� 0 D + F-]I ry I u) Li < F_ U) U -) :z 77!! C) o 24.89 301 @ zr- 0 X Ld QD 0 W(D Z < N 0 (D 0 0+50 (�o 0 (00 F=+ N (D SC TOP Bf:-RM=652.50 Grass Lined SPILLWAY lnvert=651.50 'Existing Berm & Soils to be Ta, by Geo -Tech p1or to Construe Modify Dam Re -Construction e Re ablish Propose Wet to Es Pond as Es BM Pomp - CD 4- LL_ ry uy- '911111111K "111111W M ^4-- (o 20 1 10 -..a 20 40 0 SEE- INSERT SEETS 4A, 4B, -0 LL1 :3 0 C-4 & 4C FOR DESIGN F- 0 KALE IN FEET AMENDMENT TO >: 0 ':�;r z W?0201500066 DA4 TED R..� 10+80 11+00 11+20 11+40 11+60 11+80 12+00 12+20 12+40 12+60 12+80 OCITOBIER 13, 20TY" LAST 13+60 REVISED NO VEPY16ER 10, 685 2017. 14 LL' F - 13+e EXISTING, GRADE GRADE Ml- J:IN E FINISHED GRADE GRADE O� Hori 1. 1 Kontal Scale: 1 0 -20' Vert cal Scale: 1 =5 0 n SC TOP Bf:-RM=652.50 Grass Lined SPILLWAY lnvert=651.50 'Existing Berm & Soils to be Ta, by Geo -Tech p1or to Construe Modify Dam Re -Construction e Re ablish Propose Wet to Es Pond as Es BM Pomp - CD 4- LL_ ry uy- '911111111K "111111W M ^4-- (o 20 1 10 -..a 20 40 0 SEE- INSERT SEETS 4A, 4B, -0 LL1 :3 0 C-4 & 4C FOR DESIGN F- 0 KALE IN FEET AMENDMENT TO >: 0 ':�;r z W?0201500066 DA4 TED R..� 10+80 11+00 11+20 11+40 11+60 11+80 12+00 12+20 12+40 12+60 12+80 OCITOBIER 13, 20TY" LAST 13+60 REVISED NO VEPY16ER 10, 685 2017. 14 LL' F - 13+e , F- < Cn 670 665 11 0 (n 2+00 1+50 Ml- -1 STORM SEWER O� DI -3A #11 C\) (14 0 DI -3A o DI -38 0 n 0 -3C STORM SEWER PROFILE #24 #14(OUTFALL) + L=2.5' Scale: 1' =5 L=2.5' L=4' r - W Ln DI -2D \, I DPE, _�L680 A 22 L= 8' L=4.7' 8 + z co + 0 - < Cf) + V) 0 L-) ro 0 QD F-- (f) CDC + ch (D(D- UJ CQ nq- 0 +(0 0� 0'- (0 0 0 0, - 0 < LLJ 7 11 77 ir� 0-) __j --j 675 00 0 z. 1 0 E2 C) Z 0 :7 11 0 - < F -C\ < 0C F- 4 0 F- 0+ 0 LO + r, N (D 0 + V) o U) i� F- < 0) < o� 0 D + F-]I ry I u) Li < F_ U) U -) :z z C) o 24.89 301 @ zr- 0 X Ld QD 0 W(D Z < N 0 (D 0 0+50 (�o 0 (00 F=+ N (D + it < LJ II < Xu) [if U) Fy 0-) Cn E CA __J Fy LLJ F__ --j (f) j T 30" HDPE p U) W D 03.02% II II 645 Q 0 z 0 U) 1 1 \ WPO POND CONVERSION PROPOSED WET POND > 0 0 z 15 60.00 Lo OF ry E5 0 -J_ Lj_ W Lu E 8D.I. WL X. " / , > W iJ� - 1" COPPER W/L SERVICE 74 'T 7 z 0 3: 06 z MAINTA N 12" CLEAR TYP . .... 'IF) 000 j z Vj 0 C) V 0 LIJ 0 CLIZ 0 C0 2. 0 LIJ @ M W U) . . . .. 1 y15 .1, , 88% 0 8" SL 12" CLE/AR OPO 8' S/L OUTLET PR IC TE TION . / 24" CLEAR 6 c.y. of Cl. I Ril I -Rap w/ Underlying RltE r Fabric -T Min. Stone Cepi i=1 8 43.46 LF O F See Detail h t 10 15" HDPE 4" SDR 35 @ 0.69% SL @ 2% (TYPICAL) IJU. 15" JU U OF HDPE Q 0.50 WET POND CID NWSE=645.00 18.00 LF OF 15" HDPE @ 15.28% 0 00 CD 0 0 Ln LC) Lo CD CD CF) 0 (0q LC) REBAY Lf) �6 II LO Q 1`0 II (.0 D TEMPORARY ,-M=638.00/ (D (.0 SEDIMENT D 07- D 0 0 0 BASIN (SHORTEN OUTFALL TO EX_ SLOPF) z > > > z O Ln L0 EXISI ING GRADE 7) 0 Lr) FINISHED GRADE 0 (D -0 Horizontal Scale: 1"=50' Verti,-al Scale: 1"=5' : 0 0 > > > Li , F- < Cn 670 665 11 0 (n 2+00 1+50 1+00 DJ,W/L. STORM SEWER O� GRADE #11 C\) (14 FINISHED GRADE 0 n DI -3C STORM SEWER PROFILE #24 #14(OUTFALL) + L=12' Scale: 1' =5 Lf) 630 r - 660 IDI -2c DI -2D \, I DPE, _�L680 A 22 L= 8' L=4.7' 8 18 M. H. M. H. Z16 14 675 0 - < o UJ U) V) 0 L-) ro 0 QD F-- (f) CDC + ch (D(D- UJ CQ nq- 0 +(0 0� 0'- (0 0 C\A + Lf) 0 + + LO + LLJ OP#1 0 F- 0 11 11 3: -i C)_ LO IC! C14 CIA --j 675 zC 0a ft� �_ 0 z. 1 0 E2 C) Z 0 z 0 :2 0 670 < F -C\ < 0C F- 4 C14 o < oo F__ ;0 + 655 < P (10 C V) o U) i� Cl) QY to C/) ry I in. Stone ee Detail 0 =1 8" 10 650 CD CD , F- < Cn 670 665 11 0 (n 665 2+00 1+50 1+00 DJ,W/L. STORM SEWER EXISTING GRADE #11 C\) (14 FINISHED GRADE EX. 1 665 660 i ori.- -ontal Scale- 1"=50' 7A /ertical Scale: 1' =5 665 640 11 635 2+00 1+50 1+00 DJ,W/L. STORM SEWER PROFILE Exist. #11 C\) (14 AENGTH 20'-0" /n. C RETANGULAR WEIR EX. 1 665 660 r_ F_ F_ L0 D (EX. 7A 0 Cf) (r) Lf) 630 660 2" C CLE 0 L) \, I DPE, 635 630 IIS N L) LO 0 Lo L0 O(D cJ 660 655 31.72 I .23 LF C II(D II II J '4 II 625 OP#1 :Dz- -,-- - -z 655 ........... Rap Fabric 1 )" HDPE Cq 0.63% 0 :D 0 102. 85 OF 15- HDPC LF ®1.56 �% D 0 I I 42 L c.y. of nderlyi Cl. I Rip ig Filter 655 650 P 11 C S/L T'__� / \ ; ry I in. Stone ee Detail Depth Sheet =1 8" 10 650 CD CD 24.89 301 @ LF OF HDPE 3.62% X Ld QD 0+00 0+50 650 645 645 5/.92 LF OF T 30" HDPE p 03.02% 645 640640 C 1 1 \ WPO POND CONVERSION PROPOSED WET POND (SEE SECTION & DETAILS) 15 60.00 Lo OF 640 11 635 3+50 3+00 2+50 2+00 1+50 1+00 0+50 0+00 STORM SEWER PROFILE Exist. #11 C\) (14 AENGTH 20'-0" /n. C RETANGULAR WEIR EX. SLOPE) r_ F_ F_ L0 D 2: Lr) 0 Cf) (r) Lf) 630 U) (n to N C I) 0 L) Ou').=L')i 635 630 IIS N L) LO 0 Lo L0 O(D cJ L0 O (.C) (o II(D II II C) :> II 625 Z Z0 :Dz- -,-- - -z =) ........... ,d Air Entrained 0 :D 0 Z 7: D 0 > z z > >,> > X X Li L�j 630 625 N �0 CD CD X 11H X Ld 625 0+00 0+50 3+50 3+00 2+50 2+00 1+50 1+00 0+50 0+00 STORM SEWER PROFILE Exist. #11 *1 B 301, HDPE 0 0.89% BAST VWffl\LL 635 �/o TogWall' 45.00 L INVERT = 645.00 -01 CD 0�SHORTEN 1FALL NDN AENGTH 20'-0" /n. C RETANGULAR WEIR EX. SLOPE) Y' L0 D 2: Lr) D N 0 F_ 630 U) (n to N C I) Lo Ou').=L')i '0. IIS 00 PO LnCD10 0 Lo L0 O(D cJ (6 > (.C) (o II(D II z C) :> 0D z 625 Z Z0 :Dz- -,-- - -z =) ........... ,d Air Entrained 0 3,000 psi Concrete > z z 2: z z CXj L0Ln CD Q0 X X Li L�j 1+00 1+50 301, HDPE 0 0.89% BAST VWffl\LL 635 �/o TogWall' 45.00 L INVERT = 645.00 -01 ji rT "C.-- )D� H 0�SHORTEN 1FALL TO AENGTH 20'-0" /n. C RETANGULAR WEIR EX. SLOPE) Y' L0 D 2: Lr) D N 0 C� '111- 630 C) U) '0. IIS Z 0 LLJ < LL_ 0 TF1 > 0 > z C) :> 0D z 625 2+50 3+00 Qj�07- Grass -Li ed ANJ EL-Sfl_CTI MIN. DEPT H=1 2" � Slope Varies= .5%-6.2% 1 13+72 5+25 OU TFALL 1)I TCH CHANNEL 2.5% P oppppp,- 0 4, u /44 Christopher C. Mulligan Lic. No. 031372 Q,_ 160 1101�1 1�1 z 0 "ONAL < z F_ 00 < U) 13+80 14+00 14+20 14+40 14+60 14+80 15+00 15+20 6" CONCRETE RETAINING WALL FRONT VIEW 72'-0" ..... . . .. .....J. �/o TogWall' 45.00 L INVERT = 645.00 -01 ji rT "C.-- )D� H AENGTH 20'-0" /n. C RETANGULAR WEIR Y' n '0. 10, TF1 FinishedG Si -Cin. Grade Wet Pond/., ........... ,d Air Entrained 3,000 psi Concrete 6" CONCRETE RETAINING WALL FRONT VIEW 645 1 vi 0 # DATE May 9, 2014 SCALE 00° CONTOUR INTERVAL 2 Feet ..... . . .. .....J. :F ji rT "C.-- )D� H k, Y' TF1 ........... 11H T p C -J_ iJ� - 74 'T 7 H - _A 'IF) 645 1 vi 0 # DATE May 9, 2014 SCALE 00° CONTOUR INTERVAL 2 Feet ..... . . .. .....J. :F k, ..... ...... . 645 1 vi 0 # DATE May 9, 2014 SCALE 00° CONTOUR INTERVAL 2 Feet FILE NUMBER 8053 SHEET a FILE NUMBER 8053 SHEET , i i 7C'ONSTRUCTION SEQUENCE�A�ND INSPECTION � , �i � .:�� qYri �pg� npr,-,i- REVISIONS 0 C\j CD ••. Cj CQ go y i cc i L LL SIA f 1 r ! cm rz +Cq to • ! • c• i C .L Lu LL w L cc i ! • r ! 4 ► `/, a. Sept.. i Nov. 09, 2015 DATE Oct. 5, 2014 SCALE i"=20' CONTOUR INTERVAL 2 FEET V1 FIILE NUMBER 8053 SHEET 9/14 Fr - PLANT SCHEDULE ❑❑PLANTS QNTY. ❑EY BOTANICAL NAME COMMON NAME SIDE COMMENT ❑ONE 3 SHORELINE FRIN❑E C0I3' Fr❑❑ O❑aT Ed❑❑ ❑CA❑01111MI B❑DDE❑ 455 CP Caltha palustris MARSH MARL❑OLD 5" PI[1❑ 12" S❑❑FHEI 124 HM Hibiscus rnoscheutos MARSHMALLOW HIBISCUS 5" P[ID❑ 12" S❑❑FF-MD 31 2 I V Iris versicolor BLUE FLA ❑ IRIS 5" PTI]❑ 12" S ❑❑Cull❑ 331 CE Juncus effuses SOFT RUSH 5" Pai 12" S❑❑I❑fI❑ ❑ONE 2 SHALLOW WATER/BENCH r-310' Fr❑❑ O❑ir Ed❑❑ ❑❑A❑[-Fl-HB110FPF1 5C9 ❑C G/yceria canadensis RATTLESNA❑E ❑RASS 5" P❑ri❑ 18" S❑1-1❑Ill❑ 248 PV Peltandra virginica ARROW ARUM 5" PICT❑ 18" S❑❑I PFi 331 PC Pontederia cordata) PIC❑ERELWEED 5" PPT❑ 18" SC-1❑❑[T❑ 289 SA Sparganum americanum EASTERN BUR REED 5" PIT[❑ 18" S❑❑«i❑ PLANT SCHEDULE CIDSEEDIN❑ MIX ❑ OF MIX BOTANICAL NAME COMMON NAME COMMENT 35 Carex vul inoidea FOX SED❑E ErFIFES ❑Ed❑ O d MnCERNMXFMXC131 ❑ 20 ❑ r -c ❑C�❑I]Cr 1/2 n ❑Cr 11000 m ❑D 2.1 C1Ti❑ R❑C1d. Or E❑❑IE RT11i SCiC.d M[[Tl 20 Carex lurida LURID CSHALLOW❑SED❑E ❑ Scirpus atrovirens ❑REEK BULRUSH ❑ Carex lupulina HOP SED ❑ E 6 Carex scoparia BLUNT BROOM SED❑E 4 Sparganum eurycarpum ❑ IANT BUR REED 4 Verbena hastate BLUE VERVAIN 3 Juncus effusus SOFT RUSH 2 Glyceria canadensis RATTLESNA❑E ❑RASS 2 Sparganum americanum EASTERN BUR REED 1 Carex crinita FRIN❑ED INODDINDOSED❑E 1 Asclepias incarnata SWAMP MIL❑WEED 1 Mimulus ringens SQUARE STEMMED MON❑EYFLOWER 1 Scirpus validus SOFTSTEM BULRUSH 1 Onoclea sensibilis SENSITIVE FERN 1 Scirpus cyperinus WOOL❑RASS 0.5 Penthorum sedoides DITCH STONECROP 0.5 Eupatorium perfoliatum BONESET 0.5 Eupatorium fistulosum EOE PYE WEED 0.5 Alisma subcordatum AMERICAN WATER PLANTAIN 0.5 Iris versicolor B L U E F LA ❑ 0.5 Bidens cernua NODDIN❑ BUR MARI❑OLD 0.5 Ludwigia alternifolia SEEDBOX AQUATIC BENCH ❑ENERAL PLANTIN❑ NOTES 1. SITE PREPARATION SHOULD BED IN 1N THE FALL PRIOR TO THE PLANTIN❑ AND SEEDIN❑ IF IT IS NECESSARY TO ALL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSECHONEYSUC❑LE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIR❑INIA DEPARTMENT OF CONSERVATION AND RECREATION. 2. IF REQUIRED❑THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USIN❑ SAN APPROVED HERBICIDE❑SUCH AS GLYPHOSATE IRODE01-ID TRICLOPYR (GARLONO 3A) OR OTHER AQUATIC HERBICIDE FORMULATION TO CONTROL UNDESIRABLE VEGETATION. CAUTION: SOME PERSISTENT SPECIES, SUCH AS PURPLE LOOSESTRIFEI-PHRA❑MITES OR REED CANARY❑RASSLMAY NEED MULTIPLE APPLICATIONS OF ❑LYPHOSATE OR TRICLOPYR OR REQUIRE REMOVAL BY HAND. UST BE NSGIT M TILLEDGDIS❑ED OR PLOWED DURIN COMPACTED DURIN ❑ CONSTRUCTION OPERATIC ❑THE SEDIMENT E AQUATIC BENCH IS O 3. IF THE Q BASIN'S CONVERSION INTO A PERMANENT WET POND. IF THE SOIL IS TOO WET TO TILL❑DIS❑! OR PLOWI_THEN THIS STEP CAN BE SEIPPED TO AVOID FURTHER COMPACTION OF THE SOIL. 4. THE SURFACE OF THE AQUATIC BENCH CAN BE LEFT IN A ROU❑HENED CONDITION TO CREATE MOUNDS AND POC❑ETS FOR AN UNDULATIN❑ MICROTOPOIIRAPHY. 5. TEST SOIL PHDTHE PH LEVEL OF THE SOIL WITHIN THE AQUATIC BENCH SHOULD BE TESTED AND BROULHT TO WITHIN A RANI -E OF 6.0 TO E0. DUE TO THE POTENTIAL FOR WATER CONTAMINATION❑THE USE OF LIME OR FERTILICER IN THE POND AND (ON THE AQUATIC BENCH IS NOT RECOMMENDED. ADD OR❑ANIC MATERIAL TO RAISE THE PH IF NECESSARYLOR IF THE TOPSOIL HAS BEEN REMOVED. 6. SEEDIN❑ AND PLANTIN❑ SHOULD OCCUR SOON AFTER THE FINAL ❑RADE OF THE POND IS ME7 WHILE SOIL IS STILL FRIABLE AND BEFORE INVASIVE WEEDS EMERGE. IF SEEDIN❑ AND PLANTIN❑ CANNOT OCCUR PRIOR TO THE WET POND BEIN❑ FLOODED AFTER CONVERSIONCTHE WET POND MUST BE DRAINED TO SO THAT THERE IS NO MORE THAN 2" OF WATER STANDING ON THE LOWEST POINT OF THE AQIUATIC BENCH. D ALL PLANT MATERIAL SHOULD CONFORM TO THE AMERICAN STANDARD FOR NURSERY STOCEIECURRENT ISSUErAS PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN. 8. AQUATIC/EMERGENT PLANTS FROM ❑ONE II PLANTS MUST BE INSTALLED IN MAY OR LUNE FOR THE BEST ESTABLISHMENT. 9. DORMANT ROOTS I_TUBERSLRHIL50MESIROOTSTOC❑SCMUST BE SECURELY PLANTED. DIE A HOLE WITH A SHOVEL BARE HAND OR BY POUNDIN❑ HOLES IN THE SEDIMENT WITH A STAKE. PUSH THE TUBER, RHIZOME OR ROOTSTOCK INTO THE HOLE APPROXIMATELY 2" BELOW THE SOIL SURFACE. FIRMLY PACK SOIL OVER TOP OF THE ROOT TO ELIMINATE AIR POCLiETS. 10. TRIM POTTED PLANTS TO 6" IN HEIGHT BEFORE PLANTING. 11. WHEN INSTALLING POTTED PLANTSLDI❑ A HOLE THAT IS TWICE THE DIAMETER OF THE POT. REMOVE THE PLANT FROM THE CONTAINER AND TEASE ROOTS APART IF THE PLANT 1S ROOTIBOUND. PLACE THE PLANT IN THE HOLELMA❑IN❑ SURE THE ROOT COLLAR IS EVEN WITH THE AROUND SURFACE AND THE STEM IS UPRI❑HT. BACG[FILL WITH POTTING SOIL OR FILL FROM THE HOLE. MADE SURE THE FILL IS FREE OF CLODS AND STONES11S LOOSELAND IS EVENLY DISTRIBUTED AROUND THE PLANT. TAMP FIRMLY AROUND THE PLANT TO ELIMINATE AIR POCIIiETS. 12. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE DROWN IN AND THE TRUN❑ SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTIN❑ SEEDLINIIS IN EXTREMELY DRYLHOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUIC❑LY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINI_]S IMMEDIATELY AFTER PLANTIN❑. 13. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE AERATED PRIOR TO RESEEDINL! AREA AFTER TREES HAVE BEEN PLANTED. 14. SEED AT 20 POUNDS PER ACRE OR ONE[HALF POUND PER 1 [000 SQUARE FEET FOR THE ERNS? SEEDS OBL WETLAND MIX 1-ERNMXI131 C IF AN EQUIVALENT SEED MIX IS USEDESEED AT THE RECOMMENDED RATE BY THE SEED SUPPLIER. BROADCAST SEED EVENLY OVER THE AQUATIC BY HAND SEEDIN❑ OR HYDROSEEDINII. 15. INCORPORATE THE SEED INTO THE SEEDBED BY Li❑HTLY ROLLING OR RA❑INGI TO ENSURE A GOOD SEED TO SOIL CONTACT. IMMEDIATELY MULCH AREA WITH CHOPPED AND BLOWN WHEAT STRAW MULCH. 16. WATER IN PLANTS AND SEEDS. REGULAR WATERING MAY BE NEEDED IN DROUGHT CONDITIONS DURINLi THE FIRST AND SECOND I iROWINI-1 SEASON THE PLANT MATERIAL IS WELL ESTABLISHED. 1 D MAINTAIN THE LOWER WATER LEVELS IN THE POND UNTIL THE SEEDS HAVE GERMINATED AND) REACHED A HEILHT OF 21-6". 18. PROTECT PLANTINGS FROM ANIMAL AND PEST DAMAGE WITH FENCING OR OTHER METHODS T"0 DETER ❑RALIN❑ OR OTHER DAMA-:IN❑ ACTIVITIES. 19. PLANTS SHALL REMAIN UPRI❑HT DURIN❑ TRANSPORT/STORAnE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION❑ THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE DEPT WELL SHADED LPRO)TECTEDIAND WATERED. ALL DAMA❑ED PLANTS SHALL BE REMOVED FROM STORAGE. 20. NO STORAIIE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORA❑E OR MITIGATION AREAS. 21. WHEN FEASIBLE IC_;ROUND IS NOT TOO SLIPPERY OR MUCDY TO SAFELY WAL❑[IiPOST[ PLANTINIE MAINTENANCE WILL PROVIDE THE BEST RESULTS FOR WET MEADOWS AND WETLANDS. WHENEVER CANOPY (OVERALL VEGETATION) REACHES A HEIGHT iOF 18"-24", USE A STRING TRIMMER TO TRIM THE MEADOW TO A HEIGHT OF 8". THIS WILL REDUCE COMPETITION BY FAST-GROWING WEEDS FOR SUNLIGHT, WATER AND NUTRIENTS NEEDED BY SLOWER GROWING, PERENNIAL NATIVES. MOWING SHOULD CEASE BY MIDIS EPTEMBER. 13 i - i 7 �a r ' I A1�'i"" A 1 J^'► 1 / 1 ,t r .::. NOT TO SCALE 10' :DEIE ELEV. 644 RWIgxkw go STI PC �TH 07 O� �n OAMMY MARIE GEORGE 'Z No. 0406001817 SA SCA PE Al Cc REVISIONS Sept. 29, 2015 Nov. 11, 2015 DATE Oct. 5, 2014 SCALE .AS 51-10Witi1 CONTOUR INTERVAL 2 FEET I NOTE PLANTINI: LAYOUT ISA❑ EXAMPLE FORA ONE ONE[HUNDRED SQUARE FOOT SECTION OF THE AQUATIC BENCH. THE PLANTINDS FOR THE CP REMAININ❑ AREA OF THE AQUATIC BENCH SHOULD BE SIMILAR TO THIS EXAMPLELUSE THE SAME PLANT SPECIESLBUT SHOULD BE PLANTED IN A MORE RANDOMI1- ED ARRANGEMENT IN ORDER TO PROVIDE A NATURAL LANDSCAPE. M THE CONTRACTOR SHALL TADS NOTE OF THE ONE IN WHICH THE PLANT SPECIES SHOULD BE LOCATED TO CONFORM TO THE INUNDATION TOLERANCE OF THE INDIVIDUAL PLANT SPECIES. THE SEEDIN❑ WILL COVER THE ENTIRE '10' WIDTH OF THE AQUATIC BENCH. IV go STI PC �TH 07 O� �n OAMMY MARIE GEORGE 'Z No. 0406001817 SA SCA PE Al Cc REVISIONS Sept. 29, 2015 Nov. 11, 2015 DATE Oct. 5, 2014 SCALE .AS 51-10Witi1 CONTOUR INTERVAL 2 FEET I CL j Lu CL 1i 0 CL L .d , Lo z • Nam t Im ,+ 00 CL FILE NUMBER 8053 l SHEET 9A/ 14 -------,\ * — PERMANENT SEEDING MIXTURES 8 PIPE OUTLET CONDITIONS - -,I --- _' U :2 TEMPORARY SEEDING MIXTURES @ FOR THE PIEDMONT AREA PERMANENT SEEDING 8 $ T.E'.,I""1l��",rPOR-� R _],',,,,,'_ �'-,-,�,_,,,,,,,,,,_7�,'I,',,/",�,1-/".,'Y-/,t�E'-/'7",'�, 7' T1 A -P 0 <�* 0 FOR THE PIEDMONT AREA FERTILIZATION & MAINTENANCE & OUTLET PROTECTION 4 ,cc 0 . A I A - 1 #4 W i I. �: " C\1 1: TABLE 25 TOTAL LBS. PER ACRE TABLE 24 1 1 ''I " , : . V/IMAEL' (n 1, ,� I " I : --- - I I - Z Z a =) TABLE 26 I I . � 7 , ,,;��,,� �� ., �� ,3, ca Maintenance Fertilization for Permanent Seedings '. 1�1 , V_ , , � ,� � i I '1�1;'. , " 1, � q MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL 175-200 LBS. � ,� �, '.�_ ,��F_:i , z olo C I ,_'_ ; , � -1 I i Lo N i � U( IPI -_ I �� I k I , TEMPORARY SEEDINDS BY RATESIDEPTHS! AND DATES Use Soil Test Recommendation or Rates Shown Below - . " '� `:'��',,,"� - " I .1 ____i � "I"I. � ,✓�,,.'` ,\"", - -I I I / '11,0jNt" ___ k � , I PITUMLI Lc _113L] 'F - IMPROVED PERENNIAL RYE GRASS 0-5% Td Lll�' - -11M - M DFI 100 - I', . � � I f ,,, [�__ Is __ I - �_. L-, __ --.-., ___ ,�- , , ��'51 il I I , � , ,� - ��,__,�.�4c ( . , ,� . �l,,, � % , - - �, �1. , I 'I.. Z 0 SLT.dIfJji]RI= & dfUEELT _d SM,&UIDD-10381 S, _]M�ffUrLl FLTEII -Fill LiLL FEr LETi _Fr TILL 1-1 I , _.; � e. - � I "I , - I I.0" I I . __ . ': , , "( " I . - - - I _��,_r I - - - I Q. ,� Z5,= d = 36/ f ,_, ,� 2& ',,0,/, 4� �_Z_ . ... ... � ... I - - 0-5% Alm 1000 Ff] 3d I_ d I e, , �, 1,__�L_�4 -, � .�_,�___j " I * ,_ �' . , 11 -:�� . , � % .... � �_ 11 I � . � I I SELFILT-3/ Pi. r LFL/1000 [1:1 ECd LTI 6-j 60 DA 5ri T E0,11FLEE] U FK3 li I 0 ILI 0 �A 0 500 11.5 Y�rr=r 1T11j__CdLd LNUT-1 RfEr UEU3" 0 0 - "'�, - , �, " , _��____________ - _________,_1,_ , l�,l , I , ,,,/ , ", � I � I , - .., _�,_ � I t I : t . . - I 1. I I � , , ,� -, , - I � , � , , 3 1-1 " 7 C`J � ':,I) /! � I- � �,,,,�,�-,._ . - � �. ,�� 11-11 � , , _�' - , , �, --,,,,w Q Cc LU = @) " I i [LELTI I [i 7 15L] 3/1 E 5/1F.I 8/150 3/15ri 6/1 Ij 8/1:__1 Lr [IjU11.1111rCILI-1 ITILD .1 I , _1 1, I J J -D S E , -, 2/1 Ll ,/177-8/ DO 1,10 L1 Ir 0 Ero I I 111�., : , PIPE OUTLET TO FLKI i- " ,-D VA�111IAB[F - LL11dFT_-rfd. �, ��:� " I 1, , , .,:" . 'r- ., ,'�t, , � > () 3010,'10 400 9.2 LULL � , � � I �, I I 1; 1. ' C .,�� --, 4/30 8/14 111/30 4130 8/14 11/15 5/31 !131 10/31 DEED[ IF. , - , AREA WITH NO DEFINED T. " -,- �i: P, Z o -11 - I I I 'If ". .� I � � �, �, �-," _'-,-7r>� I U1 2 BY BY BY I I . , I I CHANNEL - -1") , - " , .. -- _� , �_. �. - : : HIGH MAINTENANCE LAWN I I 11 " 1, -, . ,�. " li, �1!"l- - - . � ; , c�� , �__ , - � � � , 200 , � CF= Hill -250 LBS. PLAN VIEW ,�, � , �, _ I. B I r � 1 I] 2.5 al 2.80 IL2 X Ll 10/15 X El 10115 X F 10/1 SEnflo ILE] F.1.1 r DEI ECED 110 I � I , I'll \---.- - - _ � Ix Z , . . . _j I X I 0 r - 11 __-_V_ -- Crm,F[FuTri . I , I : OL11t] 3 IT] 2.21 112 ,I X � E I J X I tj Fit RF -TYPE TALL FESCUE 100% ffff_1JLL1I1TIiJ_IJILfi j 4 400 9.2 . lr,1_111E -F� 1111 I I I ,; . - in �j-ji_ d =i 'j. YD./ACHE - 0[20LO I C 1_1 I 1. - RL139/ 2.5 M 3.22 112 X J X X 11 X X LI X Si rFigi 1-1 U I -D -d =r[',4',5 b / / \1 \ \ \ 0 00) C@ < I GENERAL SLOPE (3:1 OR LESS) BLrdeuHL'If IrDULII] Br-rtrjFl[-r — KENTUCKY 31 FESCUE I 128 LBS. C11_�DF,1TjFr_flIIf. � La \\ ,�'... 1,(', A VAT'E (J"I -)'A,(, \ \ '\ \ , \ \1 !� Z Uj 2 1 50 LFJTT� 3.45 1 X X 10/15 X X 10/15 X X 10/1 I Lu � ( FLI � , ORP, i,]A:- R�_LJPiIJIIII V t- JR �- _1 I \ 'ROUND L. % ,,,, 0 I F,=_!jLLl X X X X X X X X X NLL:ruairEd. CLE 1-___...._____.1/ � \ C. , tj RED TOP GRASS 0 % - \ \ \ \ F! FV� 0 7jITL401 I I � - 2 LBS. FFIrTUI]EfTrL-1 Ff.EIIM ELT -r LIFLEr ][Cu4" ILL --,, - \ " Ad (b -j Z ,-i R - W-fluill 20 LBS. Lau d ]DUDLE af-UnLidill FLIUMH1 I =,0U[ ED FEIL[El ILE, 11 . �1,'I'll �.�..�i, 4 LITI 0.09 1/4F112 D, X Ell D X 0 F -I X El I. 1. \ � � I Cc < , < C, �1, I I TOTAL 1 50 LBS. OULELE) 0 IETF1110 5FIOL10 500 11.5 11 ,- , "; � " '' , , I I I : --11 , d - , -_ - R!P� A� (3 2: LO ILLI.Tr1-f-41/ � � �,,,-`,� � �,� �', �,!:, � I � 11 � L] I F1,U d L'LL�rl J 4 I 5 d -ElEd Ef-Cd UM El � ", � � "'?, ,_v- � �, -, � - - � - _ I :, -1 r' -,:-F PLAR "J. -Y, I Co/',J_I�SE AGGREGA I 1 -' I .. � - - I 1 , t I%- H I - I _ :� - (0 LOW -MAINTENANCE SLOPE (STEEPER THAN 3.1) Tff_orjd,=DFr =r El [If f FLUR r. PITM ITr F=d = fI_'T" � I 0') AI -1 (A f] 50 LILLE! 1.15 1/4'1/2 X "I 11/1 X LJ 11/1 X 0 8115 [Ad =LICIFf 111liq 11 9JIf lid. �_� N rl Et L7CLS S FILTER CLOTH FOR THE ENTIRE IN 6"-9"; RECOMMENDED MINIMUM I RIPRAP PERIMETER LU () cc 8 11�t - -1 - I I-- "',% < g t I - - 108 LBS. ,� - - -- - -- - E, T 1, 11,\1 3j F11 M_'T1!Ti421 1.15 1/2 X 0 El X 11 0 FIE" UDLL1fI_r1L,LLJ NlfrEE[IrEd. =1 I _ - ,( i �,: ( I i� - -)' - -j (, 1 -11 I , I I � - - r5111-1 I _ i i i I Sirill', LILL! LECr EIIL[Tr 11EC4" H A 0 LLrIflL1 LLU1LVd,]FfJ - 2 LBS. T:01111flt I I I li� 11111-1 I ft-EL111ILTEL] CUFLUk'11 -J-, EL13A L r ILUILIf 5111 OL1 0 L I , 1 el ,; �6/ A 011TI= = M1 F1 m 1LU11 DFIfIff D 500 11.5 ..' E1:LLdFF_'_rL]3: � ".: I "Ill I � I I I PE OUTLET 0 0 LL - I -, I �_ � , : I . 31 /R=r [to lift -I -EA 1'Adr1_tijd:r,-I-j USDALARS MI,T_L;TEL=P=,1]U11'LJ4!__5� FEELEr-01990 i-iurlEir-dijunflorlim, 4 d[TjU di ULA [in, _ %, � -11, 1, - ,� PTt� (� _j, ,", �, _ � '' __ � � " " I. � FTEro ILL[ fELM. E'LlEr Mr[TITE ELf i , , �, I -, I'll TO WELL ` L. A � ' L, R 0 , � - _', I I 1) -_ 'I,- " I 11 I b L_ I j] , � , I, : \ -,X -:: , � , A� I U') - 38)B1-1fflLI11,'rLLf=d MrLlUjEFdL!fJ:ld[Jl-'IJ-LE-EILI,�LJ=�FI-Mld-li-rFl,f d Elrri�=-EFJ rLLFJ-d F]-_-1_LIfI:j I�JCd 20 LBS. _ TrLd ��, 'Jlf"I�i��11, I , ; DER I /-- 11NO11-1 (IN FEE I , , - . � \ 6 X 0,`'AINAC�F: AR�A . , - ,,, I " �;__: " �11 � / - - �, - 'r ,�, , " , - � I , � - __ ,f HIM ILIA I rLj --t jdLICFLT-dd 56 ELILD I , � I I , - \ Ed Ef] El E1J= FrEF Ilr'l _Lr[LIjij[fUi1rJri1_-1L - - 11 � � /1, /1�� 1"Ic"." :�, p C3 , I ,� , , " -, � I' ,�_ \ 39P' -F] EI � LEL , ,,_I-,- _�. . ...... �, , �:1 , , " , / I ) _�� , 20 LBS. 4 �� " � " � "I `, � I I_ _ I . , - . , — ��L_:��__-_ , , ---11E1!1EIELrL11_j-Fj L_1,11d�111]0:11117r[] - M,JF] M LE111 fr [TED D .... -_ � T 1, - - -1 �_, - , \ 'I ____ -1 TEr r I I . " � -'I,,- 1711'e -1 , - . , � � - _: _ , �____ I �- I I 2" F_ ,-d LMI-D I I 1�__,�_� �- �, ,��_ I` -, . •DIVERS10, 1 EEd M, --,,l CROWN VETCH** 250 5.8 8� fIL[ ' .r� � , ��! " , , d +LO(MIN.) , -, ��-��: , - - - ', �_�- " l __ I _rFT_1L d S[ILLL]H1eT1J1J-,Ad1 I till: [Ir- FIET11:1 FCrFr�]S - 2OF-IOLIO I I �, , , , 0 �, . � __ __ / �:) cc I 1-u,'T[jT,T.r , , - , ; , " ,�� , �",��_,�� --- = . � I � -11 I --- 4, : I � , � , , , -�,�__ , _-- 40P TOTAL 150 LBS. RLA Ll LL - !Z, 30 di J. I 11 , " , , I�Z_ ,��= / ,/ 0 1�, , _�LFLFIL] -�,�,� �,, ,,, -,- -�� - , \ I - , , I � ': - !� , = __ I ---ML.C][-EllLdL,�-][Iitirl',]Lr-E,�-rL].'d=El[rE�-r-Ef-[Efi-FFdLLIJ-11 Add2UVLE ITIFELIEUD1117111FIEED EEd El FJ LAILELr = j,_ '�, - " " , �,, " , : I 3� ._,��,� _Z1 .- IN ___ // / f_'� I - Lu, I " L � - , , , � � I , , ��-E: -, -Z -"\" K I- , "i . _� __�_ ." " I __ , , , , - � � � 11�1___ � I` - - �_ I / 41/ , , i -, I - I - � , - � , I ,_ --- - �,_��___ _��'_!�_, I I Lt W M T I FLI -Lcd 0 ILE NCE WITH SEEDING DATES AS STATED BELOW: [I E- - I , , I : � . ...... �,, , �', , � 5Z77-��!_,� " --- _ I / It - 11 _ I �§ [11 -LEM IF __FriTEF]I]Erd Di,[717i I �]Lrl, If d [ If j'17r turcl 3I , , , / 1, I" , , ,� , -, I , ��> ,�11 - " 1:,1 "', , , , - - I - Z�,z - �, -TTI'L=dFj]F1F C? -r-] 'EFrEJidi�t[LI[i,rlLr-]EE-�LfLFI-dEal- Add101iDal FULLED F1 'PIE 2 LLEE-3011 tllr III= - �: , '. � , � , � �: 1� "•�__ - -_� 1�,__:_�;__ Z31_ I I I / (4 .t .... I , - . \ , ,��_ �4 - ��- ,,,-__�__ "o 0 - " M --r- -I - R10 M�L] Oil , � - , ,� '. , , " I , - __ I '\1 -110 , , - J-� J-i,Li k_dIi�uUdh I 2OL111-10 I 100 1 1,3 1 ,;,��, I - � . �; '. I I , - �1� -1_1 I 1 i<41:: A d. "" ., I r, I _�\ �,�------ ��"____ - , - �_ =.:�F- �Z!� ,,,�_ T- CO - 42F�"J'FL`� L , I \ � �e" - t ��__ � . . . . . . . . . . . ANNUAL RYE LITIF101 I � - - I , I 'I,' Si, - 11 � \� -- - -- "�, _:- _=- ,,\ - -\� - ---- - --k�- ) �,'f '__, �. __ - - Zll,lz �_�_ , -- , � , _ ,--- , - ,��-�_-�2FE --- - , 1) THROUGH APRIL 30TH. PLAN VIEW , " I I I I �,'. 11� , ��7 _ � --- , \ _ � 11 - , , - - - , , , --...- �- - Uj GUST 15TH . . FOXTAIL MILLET I 1, I ,: -1 ', - ... � ." I-Al'alia-z- :Z_�_____;_�Ml - 0 MAY 1ST THROUGH , �:, .,.,, 11 , _.____ �\' _W,,%, -1 -, ,,, � A�� - 0 1 ; � I , - - I", - - \ " � �;. "t '�-- �,, �,X� __ , " - -, Q ,,Z,,�,,— ,�___._ , I - � ��-_ - _< �< - -,-,, ) , '1- �, I . � - --0,: - _- I * , , * * . . . . * , , — "\-�,,__ _- ,�'�-::: -_ ,, - , Z , , - -- i��L,4,�,�-�'�C?�:. I - I - - , :�� -, �,� �,�_'_�j ., > - -- - - - \-,--- �, , - ,� . - ," " - - I l_ AUGUST 16TH THROUGH OCTOBER 31ST . . . . . . . . . . . .ANNUAL RYE LG � _-\_2 ", .,. " w -, -, � �4 z_�,�� ,� QM_ : ��,_,'--,_�_\ - --- - , 15 1, - Z 0 - -��-�_ I � 3" - "I ) \-' -, -e 11�-? " - ,��_�§�- -,, � - \ ,,--- � . ,,, ,- -- -�`� - - ,� I ,Z� - � " ,'::._:7_-_ � I- :, �\ - - -, ,� f, , - '�_ "I" , , 11 _( _�Vl - I " — -,�� — -��,------', �-�' 4 -11 V, - - -----. FEBRUARYNOVIEMBER 1ST THROUGH H . . . . . . . . . . ANNUAL RYE ROCK CHECK DAM @ I -=,�----,--V,.-�- \ Rllmw i - , , - ,- , � �,- - , .�, \ , - - `�fi,-,I) - _ - �, __ - - :,�: - I t�_ , , - , ,-: __ ,�jf , , , 1, - - - E:-\- -- , - - ____��Z_a��__ Q_ 11� - - X , "", , _ _71 \ - � '. _.-_ - , ,� , � _ , . -,-- -- '1� , ,__5 �,� - 0 % I " ,�, __ .- - , - - , 11 � � - � �, STD. & SPEC, #3.20 1 � 1�,�__ __Ir��,0�1�_, �, , �� -H_7�� ,,�,_=- �`__.,'_'1"_�,__.___�_' ��---- � I - - � " ). ��C,t - -, , - , ,C_ ',-, , 1, - \� __ __ , -- I I � :" . ,___ - , ---,. \ �__ - \ 11,_:. , �, = �- � , - ** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA (MAY "; I .. I " zz , � -z-g- 1� - ___� \''=� ,-.:: \__ �.. �z ,,-,,, I , _L ___ �� ,!,- - f. �i' __ I- 1\ ___ , ", __ �� 11 ________ '-- ,�,�, \1 \ � 11 , . --- ... � 1 11.- I I I I - - \"-- -- " N,TS. - " , �, I . - // ___=�,\�, _---\,�__ I � � 17- , � , , , ` 1, , " , -----"-,-- , - - - "','__ - I , SEPTEMBERTHROUGH USE HULLED SERICEA, ALL OTHER PERIODS, USE UNHULLED I : � � �, , - I _��,,, 1�1 1�111 �' , 11,�'.,, "', �', � � � lh,��. d I I � /// 'I, I— ,� 11111111111i� � I �� , � �_''j, , ': �,:, I/ " ", ------- / ,,,�_�---�\, I 1-/ - I 11 I I - I / I I 1: . \ 1�,�.' �:=:::: ,� -= I � __ �-,\�,�-__�� I _�_� \ ,�-�� , � � � __ - - SERICEA.) 1-11 I � I _F ,_� j ( i -------------- // ,Z /-/ � I I ) \ " j - 11 Z / "\, / /_ _._- 11 1\ I I _11. I _ - - _1 1.1111, -111-1-- - ...... 1. ,Ili IF FLATPEA IS USED IN H, INCREASE RATE TO 30 LBS./ACRE. ALL (0 FILTER CLOTH KEY IN 6"-9"; RECOMMENDED FOR ENTIRE PERIMETER __� COA' SE A""R - T- __�,' - I : N -) \`�k _-, , - - � I I 1. I - 11 I 1.11, ... ..... I ... � ...... 1.1.11 ..... � ..... . ; I L I I - �V � , i_ .:1 � r I - 11 / / REVISIONS I � . � _", I --!,) , \ - I _( EX.- ,, -- , , ��'. , BASKET, OR CONCRETE. --- \ / ,,-�,✓- Nll� - -�, l ITI 0 NOTES: 1. APRON LINING MAY BE RIPRAP, GROUTED RIPRAP, GABION \,, _ _Z, -1 � , ,- LEGUME SEED MUST BE PROPERLY INNOCULATED. WEEPING LOVEGRASS MAY BE ADDED OQ-0 � ( ", -- ,� / ( " - i - I-- ____---_,�, EE1'SS -,,, I � "I ,:-,:` s�m,,,��, A"-��-1 �L.�, I I TO ANY SLOPE OR LOW MAINTENANCE MIX DURING WARMER SEEDING PERIODS; ADD 1 0- � ) �_) n 2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED ----A, R,, E A _ _ ... _____----',W� -_ - I / FI TER C (�TH- -____, �(,"IUF_`,,',�_ , I� - L"O 20 LBS./AICRE IN MIXES. FILTER CLOTH USING PLATES 3.18-3 AND 3.18-4. / _�_ "�_ -- July 30, 2014 I'll. 1�_, , _-) I 1, ��111 � F,,V-v-NT . lk, ---'---"- I" - - ___ ,I ) - :_ (OPTIONAL 3. d = 1.5' MINIMUM CLASS I STONE DEPTH � / -�� \ � �, i i 1. ,_;, ��__ 11, 1,',m� :-I- � � . . " - . - i � _11, I � I S - _-11b., �, - -, _0*� 0*0*, 11 " Sept. 29, 2015 -1 , I'— -P. � I 11, �.II, _ " 11:.V`,, ", � � ",,� 11."11711 r -_ _.- I X I I'll ,;,f",�,M,11 -1 - A — ' I � , 11 ", . I � I . (DO)VA"S-TREAff VIE#) Source: Va. DSWC 4 t', % Plate 3.18-1 ** _ ' - ' A� 1 �,4� �, �"p E SHALL BE VDOT #3, #357 OR #5 Nov. 09, 2015 r ' i - ��_ - `,�- :t� li 5 �J � 1, i, 2 " A A','- ,,-, - �,, . - BA' - INFORMATION FROM TABLE 3.32AC OF THE VA ESC HANDBOO11 VDOT #1 43,- - I- I " � I - , �', 11 l � I/ - - 7- - - ... j . I � �-,- \N/ ), EROFILE 11�4 " U � L - d, ,--- � �� ,. "I � "v! 1 , 1, IS PROVIDED BELOW FOR SEEDINO SELECTION COARSE I O', - ) � � . � � �,� P 111, I r -, - ", I v , ) TOTAL LBS. PER ACRE A GGREGA TE;--",,\ 0 C�:> � C 0 .2 - A?11� &I , 7,1il' �4_1`�,- I MINIMUM CARE LAWN 200-250 LBS FLOW - CC) / 1 t<1 7�� SOURCE: VA, DSWC PLAI - L. 3� 1 3-2 -COMMERCIAL OR RESIDENTIAL n Christopher C. Mulligon . I" _` 1; 1, ) 0 Lic. No. . 1. 'N �," i , �,, J ,,,, ". r I U" F-;. 1 .... . I 1, - r I FIAL T Pi' F � � 90-100% !, - . I I Q 10 4�7 I*"% 11 031672 � ---�, I &_ff / , ASH A�',: �<' ( � -\c t f-0 - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 0-10% �I - \�11 ___�,_ 0-10% 11� G\ ,-r--_7, C S� I IMPROVED PERENNIAL RYEGRASS S \-\ ISER PIPE RA c'E7 CONDITIONS _.��, , I � "11 �' I ITJ L3 1:11, , ;�,"F � , 11 � ) q � I ONAL - " i �_ , f l�� 1. I � .�,_ I'_,- 11 - .1 - I )I '_ i )f " - ), -'-I I, � ',XI7TJv_, � RIPRAP I 1-�-, I . KENTUCKY BLUEGRASS JWT�k ),er' 1-f , I t'� "I I -1 " ,I � I ,_ ') , I FN'l I I i -If, 1. _ � � FOR iWET POND C'D.�YT�.ERSION .zi - I " �,, J�f"" - � ---- I GENERAL SLOPE 3:1 OR LESS) 128 LBS I Tom" I 1, 1� � 1 211,11, 1. .1 I I I---- - ___ _____ -------------------- ----------- - ! �__/ ), --:-, . P 2 LBS I I I - ,,, -�11�, . i 1 �,�4,J " F�`� , �( . I C�l 7--) 1�1- - , . I i �, I I . KENTUCKY 31 FESCUE POND - � , �r �,11.4 SILT FENCE OUTLET DETAIL -'?-! _- �� I . �. I '1-1 �. P �,� f-� � I I I I -i T -f 1 7 �11 , : 4 �f ; - ) I'- , T". _�'� "I �i �r (_,i I , , I , 4 . I '' I j . i "� / , A ", , � . � I 20 LBS i F_ /1I I � I � f . � -) 7 I ( �0�� CONCRETE BASE FOR PERMANENT RISER STRUCTURE " - i " r, _eA,� ,- I/ /-!, #-1 ! � I � " , - - � / ,,, I 7 -L _L J V� I I-, - � , _" -1 - , k- 1.`�,, ,'.'_Jz�'. !.�V'. l%_) �111 -` _j . I - I i 4 i I L SAEASONAL NURSE CROP ** I (SPECIAL DESIGN SILT MODIFIED FOR HEIGHT REQUIREMENTS I I ; i I I DATE ' I � FENCE �11 - � I ,I F'O",,11 �IA'�`, F I ! . I . -- EXI-Ei1`� I�L� L � i _0 �_.�,lv� I I . � I'm U S, � L ,,,-, L(D ,-P�11,vi �,�_ ! I � I �,� 1 � , � ** USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED BELOW: I I ,. � OF �J�',rRl'_:_��S AI'll-) F,Gf-,`E`--, T � I I , I- 1, "' � �.. I I - , , , , I ; , ,_�. � Ni 1, : -,,: � ,; . T � U", P � - 1 ,�Ail(__ MARCH, APRIL THROUGH MAY 15TH ANNUAL RYE . ; 2" May 9, 2014 � , i j I -_ ,� I I - THE D'STANCE "Ifl-H I HAT PC�Il,]Tf- I I 11 . i T G FE H-LATMOiN MAY 16TH THROUGH AUGUST 15TH FOXTAIL MILLET I � � E .�, "I �) '\1 TI I. I I- . A AND B ,AI :L OF EQUAI ELEVA110N I 1�1 I PLAN AUGUST 16TH THROUGH SEPTEMBER, OCTOBER ANNUAL RYE I EXIST. _j \ ,% �1. EXIST. NOVEMBER THROUGH FEBRUARY WINTER RYE GROUND \ I ELEV. \ . , " __�4 GROUND ( - i ELEV. I ", ;�.,,�,��,, I K,- - - r- , I � I " 11 � 1�1 i '_ .. . ... .- .... __ ... .. -11-11-1 111.11 ... 1.1-11.1.1-1- ...... 1.1�,,� ,%�"IN. - , ., F'1",__A:"A�, _+'!,i%,&IA,','�4_ I , _ . I I I FERTILIZER (10-20-10 OR EQ) SHALL BE APPLIED AT THE RATE OF 1000 LBS/ ACRE. ! . , I_ 11 11. ,,, , , 1. - - - - - - � - - I AGRICULTURAL LIME SHALL BE APPLIED TO SEEDBEDS AT TTHE RATE OF 90 LBS/ 1000 SQ. FT. 1i c, � OUTLET CROSS SECTOIN �'](_� Q'V4T - . ,r r. -.--- SUEi uESTED TEMPORARY SEEDIND MIXTURE � , , "' �� " -, :_ 7" , - \ - " " * , t 11 -Ai 1� 11 " , ,,�,�,, _________,_.______ - � ! , " -','-,'f-- 3, -, _,, I � i ""I" I � I , I'� i�. �, �'; i ", , , ��'- � ,-,,, "', � I I I I , -1_1_111,111`71'11 , FERTILIZER: 10-20-1 0 1,000 LBSfACRE ; 'F?. - 1W11111 - � ,� ,�,, ,�g,� � \\__ 'l , -1 ,..� ';%'.4 � , I , ,,,i,, I �M , 1 k,�_, 1 1 -1,4NO �11 � 11 I I '_ . , . I � 11�, 1, - 12 . I , I �_ I " , , I .- "I � � � �, � �,,_, � —6 I,; �, I", 11 '?, - " , �,',, ,� , I �: " , ,_ , __�', � ,,,��,,,-,,,"_ � SECT[O—NA -FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 1 00 LBS/ACRE �� I ,1111111 15111. I I �� ,48,�tMQ z " , , ,"'I_ I I , I ,;` , '' ��,l, I �� " , � , , � I SEPTEMBER I N ", , , " , ,�E ,�, , ,� " '' ->,� -, ,,, ,,,, - , � 'I, " , FEBRUARY'l 6 -APRIL 30: ANNUAL RYE I 00 LBS/ACRE I 11'�"�, � � ,"111`1' , . 11 - ,-----------------------------,� I - 11 11 . MAY -AUGUST: GERMAN MILLET 50 LBSiACRE � - I" , I ''I I I ;_,� . .. 11 . . �,,,, � ; � ,"I", , 11 � 11 �� I � " �_ - ... , � � I - - I -- - W afted with "k 11m, �11111111 I indl Wilcock �, �11 �- T1- I � ",:,� J, 0 1 1 ' , " � '' I I I- ... 11�_ I I 777F -7777:77j-77-.7- I 1. IT—- , � * - ---- - I -, I - � _77 1 , , - : . ..... � -1=1 .... - .1 I � 4 . ,:. . - I - . ....... : .. _: . .... . :_ I ...... _.: - I qIII III - - - --I I _-I I I -_I I 1_1 I 1 4 1 - I r__`�T I I THE i:: � � A mil 11111111 W,-ktiJ tap Of I ftldl 11111A be itl,q-� 0 R OPTIONS EXIST, SEE VA EROSION AND SEDIMENT CONTROL HANDBOOK, �11 F., I , -III - 4 1 I , I I : : i . . - 4 1 I -, I I .1 . I I I I I � I -1 I I- - I I I I I I I I I -I , - . . � : I � � I.." - , ,. , � I � . � . � SI-111(off Valve qkIpphriLiin, a W�I,sfi Ilcls�e �xitll -,I diallietei (If 1, � �Idles for ack�qljate :I I I- I _ -- 1 36" g�* - D. .1 , :1.11 ...... - � , ..... . � , - � . .... � ... ��. ; . .... .. . :, � -1� :__1:11 ... � It- . ______ - - -------------, ______ ___ - - - - __ - - - � . . . ..... . .. � .................. ___ .......... . ........ .. __ - _ ... � .... __ ...... � .... __ .... ..... - - - I I : 7 - . .. � �': '' � � . � - I q�. 4 - " i- 7 . ..... �.... : I I ��_�_. , : " ,:. I . I I - -lied awily ii-ofn tile eaff-'111ce to IMI I . . I , I-- . I I I : Qoa�Amlt .11 ,j \7,,7a,A1 -Vv'*en 111tiA h(� C'm I SLI[i [iESTED PERMANENT SEEDIN11 MIXTURE SOURCE: VA. DSWC PLATE 3,20-1 1 . . :1 . I Z I - I � I I';"_ - - _�__ :_ ... i.__.� .: .... . 1. �: I , - - � ______ __ - ... � ................ . � � ____ ... _____ ....... ____ - - __ , - .... � __ ___ - __ , 1. _�: � ... � �'. �:�: ,: ....... _: � ": .. . .... �.. ... . � � ,-U seckiliCIA'silaft be pt-ev��Ilted h clirl PERSPECTIVE VIEW . . 1. I C\1 ;1-,�pll:p-��,�--�-1"��.�-�ftl.l�,ipti��it4-pl�iiic�17c'si�cliiiie-,Iit, , s I.. I - � �. I 1. I I .. � . — —1: 1-1 I - � I I I -11 I - � � elilte],4_u sk-Aw djoiji->� ditdlle"� or -,IAjtf-fo1111",",4�-, , LIME: 2 -rONS/ACRIE T� CL I FERTILIZER: 10-20-1 0 1,000 LBS/ACRE SUPER SILT FENCE CONSISTS OF 2 ADJACENT FENCE SECTIONS SEPARATED 1-1.5 FEET. . 30 �1�1_ 3000 psi CONCRETE a � I - - �e Z ,--,,,,A�,_E MARCH -MAY 15� KENTUCKY 31 FESCUE 200 LBSIACRE, ANNUAL RYE 20 LBSIACRE ' I----- - - - - --------- - - -------- --- - - - _ - - - -FAIL MILLET 20 LBSIACRE j W __ MAY 16 -AUGUST I 5: KENTUCKY 31 FESCUE 200 LBS/ACRE, FOX CONSTRUCTION OF A SILT FENCE `_'_1/'_ �VAII'i 7-1—h-1-1-101" i1f,111111;-1-41 )`;� . I L, WINIII.—mm'"Im'"'Im"'1111 E 1.,),.D 11 CA L v��', i_� 2 ..,.% AUGUST 16-OCTOFBER: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE , � -"F,-f ,--,, r7 � , , / -1 -FEBRUARY: KENTUCKY 31 FESCUE 200 LBS/ACRE, WINTER RYE 20 LBS/ACRE ", 1' �, ',_� �__) � J 'k, , ) I ___ �_ - 0.i __ 0 (WITHOUT WIRE SUPP r, i-,) nc, (�--� , M Vj I NOVEMBER �_' .)..I. 1..� 1 �/ SOURCE: VA. DSWC(MODIFIED) PLATE. 3.'14-14 , 10 .j 1. SET THE S TA KES. 2. EXCA VA TE A 4'X 4" TRENCH I � < . UPSLOPE ALONG THE LINE OF I I � I C'),1v1'L1A(_� I-Ef-) �('H� I 3 \ �Z < :5 . ��---"-------,-.---,---------�-------�---------------.---.,---------------------�. STAKES. i � , I- I I V�111 - m 7 j" I " i , I i , i L � , I 1 : 6'MAX. : " I 'i . : i : i , , Y I 11 1!� i .:�� I 'N'1, �, .. ..... , ff I z X TIII I I . " �q , i � ,,, \ StormRa i ___ I z� I W 0 : t I] i ! i . i _ — I -1 "" . i — I It i A i ,.-I-ml- ROUND SERIES TRASH RACK i 11 I � i I m — `�,�, �, , : I " ". � , �-,`,`,,,,�, : 'I S ",`,`,','� 4 . I WE ,�,,,,,""� . "I Uj : . -��_->� --, - --- � 11 ll > . -11 I - Z i : . . � , . I 1?n,� q CONCRETE MANHOLE -I..,-- ,��_ III -, 5��5 . 0 - i I � : I --::: I. : I __� I , "'� 06 �- - ., i I 1, I I - �Wffl 't"'. 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I - , _____ - ____ : _ I i I i : DRAINA GEWA Y INSTALLATION : i I ]TH FI 16' j I I � -7101 I A A I APRON LEN[ (877) 877-5727 phone APP'D BY: q I t I , PROJECT: ; I I , ____.____ _____ ; FRONT EL E VA Tf ON) PLA TE. J. 05-2 . I � � I� I .� : 1 (540) 722-2219 fax F II I t SHEET DETAIL 11 I 1R. I-, ViAFER-WAY C,',-)S':��-��r,�,",':i-)�,j��- : \ -soluflon.com " % I r � I % htcp:jjwww.p1asdc , SOURCE.• Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Contra VA. DSWC t .................................. - ...... ___ � __ - __ ------- ____ : � 11.1.111,11, � � ..... 1. 11 - � - "I'll,__111_1 I I I-— � 1- � 11 1. 1-1-1-1 ......... I .............. ---_1111... ... ..... .................. � ............... .............. .. . � ; __ � - _____ ____ --- - ---- � --- - ----- - - ..... � ........ � I-- ..... .... Sherwood and Wyant SOURCE: VA, DSWC PLATE ti .17--1 10/14 , ------------ �___________,, __ gNAII I nW :3 a :r, ON 22II& L APES. STRIPS OF NETTING PROTECTIVE COVERINGS MAY SL BE /1PPLIED ACROSS • r• r3 • • • • • • r . r -, IN DITCHES, APPLY PROTECTIVE COVERINIG PARALLEL TO THE DETECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AV= JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL P06SKEi SOURCE: ADAPTED FROM LUDLOW PRODUCT5 BROCMUKL Existinq Sediment Basin raw I L: %7•0v-1 OLD TRAIL SEDIMENT BASIN Block 14 Type 1124 -hr 100 -yr Rainfall=91.1 6" Prepared by Hewlett-Packard Company Printed 2/13/2015 H droCADO 10.00 s/n 08126 O 2013 H droCAD Software Solutions LLC Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff - 167.25 cfs @ 12.09 hrs, Volume= 12.322 af, Depth> 7.68" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type 1124 -hr 100 -yr Rainfall=9.16" Area ac CN Description 19.250 88 Fallow, bare soil, HSG BIC 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0,0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68„ 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total OLD TRAIL SEDIMENT BASIN Black 14 Type li 24 -hr 100 -yr Rainfall=9-10" Prepared by Hewlett-Packard Company Printed 2/13/2015 HydroCAD® 10.00 s/n 08126 © 2013 HydroCAD Software Solutions LLC Events for Pond 14P: 11-28-2014 Asbuilts Event Inflow Primary Elevation Storage (cfs) (cfs) (feet) (cubic -feet) 1 -yr 42.93 20.76 643.10 117,409 2 -yr 55.93 25.26 643.64 129,140 5 -yr 77.01 27.21 644.70 153,264 10 -yr 94.62 28.81 645.62 175,308 25 -yr 120.52 31.03 646.99 209,564 50 -yr 142.83 107.72 752.95 209,715 100 -yr 157.25 195.40 1,032.41 209,716 I, PRIOR TO CONSTRUCTION 1.) CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). 2.) CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF CONSERVATION AND RECREATION(DCR). 3.) CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT EIGHTEEN SINGLE FAMILY DETACHED DWELLINGS, UTILITY SERVICES AND ROAD FRONTAGE AND SUBSEQUENT INFRASTRUCTURE. ALL EXISTING AND PROPOSED RUNOFF FROM THE DEVELOPMENT WITHIN THIS SECTION WILL OUTFALL TO THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS. THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS WERE SIZED TO ACCOMMODATE ALL OF THE NEW DEVELOPMENT ON THE SOUTHEASTERN SIDE OF OLD TRAIL DRIVE. ADDITIONAL DIVERSIONS SHALL BE INTRODUCED TO DIRECT AND CAPTURE ALL RUNOFF FROM ALL DENUDED AREAS. A CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION SHALL BE IMPLEMENTED AS THE FIRST STEPS TO DIRECT SEDIMENT LATENT WATER FROM THE DENUDED AREAS TO THE EXISTING SEDIMENT BASIN. THE LIMITS OF DISTURBANCE INCLUDES APPROXIMATELY 12 ACRES OF LAND DISTURBING ACTIVITIES; ALL LAND DISTURBING ACTIVITIES HEREIN ARE SURROUNDED BY EXISTING PAVED ROADS AND STORM SEWER, WHERE EXISTING RUN-OFF IS CONVEYED. EXISTING SITE CONDITIONS CURRENTLY THE DISTURBED AREA IS MOSTLY OPEN AND GRASS COVERED. THE EXISTING SEDIMENT BASIN IS CURRENTLY RECEIVING THE SITE'S RUNOFF, AND WILL CONTINUE TO DO SO THROUGHOUT CONSTRUCTION. THE INSTALLATION AND MAINTENANCE OF THE SILT FENCE AND INLET PROTECTION THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF FROM EXITING THE SITE. THERE ARE ALSO SMALL PORTIONS OF THE ADJACENTLY GRADED, BUT STABILIZED AREAS TO THE NORTH OF THE SITE THAT DRAIN TO THE SEDIMENT BASIN. ADJACENT AREAS OLD TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE CREEK LIE TO THE NORTH, AND EAST. BLOCK 15 OF THE OLD TRAIL SUBDIVISION LIES TO THE SOUTHEAST. STOCKPILE AREAS ARE LOCATED ON THE EASTERN SIDE OF BLOCKS 13 AND 14. STAGING AREAS WILL BE LOCATED IN EITHER FUTURE BLOCK 12, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND CLAREMONT LANE, OR IN FUTURE BLOCK 18, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND FIELDING RUN DRIVE. OFF-SITE AREAS NO CONSTRUCTION OUTSIDE THE LIMITS OF CLEARING AND GRADING SHOWN IS REQUIRED. ANY SURPLUS OR SHORTAGE SHALL BE BROUGHT TO OR OBTAINED FROM A SITE WITH APPROVED E&S MEASURES IN PLACE. ALL EXCESS MATERIAL SHALL BE HAULED TO AN APPROVED SITE WITH ADEQUATE EROSION CONTROL PROTECTION. AN OFF-SITE BORROW OR FILL SITE WILL NOT BE NECESSARY, SINCE THERE ARE STOCKPILE AREAS OF FILL NEAR THE CONSTRUCTION AREA (ADJACENT TO BLOCKS 13 AND 14). SOILS 4D - ASHE LOAM - 15% TO 25% SOIL IS RELATIVELY DEEP, HEAVILY SLOPING AND SOMEWHAT EXCESSIVELY DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS VERY LOW TO HIGH AND WATER CAPACITY IS LOW. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 25B - DYKE SILT LOAM - 2% TO 7% SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM, 26C3 - DYKE CLAY LOAM - 7% TO 15%, SEVERELY ERODED SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 37D3 - HAYESVILLE CLAY LOAM - 15% TO 25%, SEVERELY ERODED SOIL IS DEEP, HEAVILY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. CRITICAL SLOPE AREAS CRITICAL SLOPE AREAS EXIST ON THIS SITE. MOST OF THE AREAS OF 'PRESERVED' CRITICAL SLOPE ARE LOCATED WITHIN THE 100' STREAM BUFFER AND NO LAND DISTURBING ACTIVITY WILL BE TAKING PLACE OVER THESE AREAS. THERE IS, HOWEVER, ABOUT A 200 S.F. AREA LOCATED JUST OUTSIDE OF THE 100' STREAM BUFFER THAT IS GOING TO HAVE LAND DISTURBANCE ACTIVITY TAKING PLACE ON IT. PARTICULAR CARE SHALL BE TAKEN ON THE FILL SLOPES AND DITCHES TO ENSURE ADEQUATE VEGETATION IS ESTABLISHED AND ALL DENUDED AREAS ARE PREVENTED UNCONTROLLED RUN OFF FROM GETTING INTO SLABTOWN BRANCH. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. STRUCTURAL PRACTICES 1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) -TWO TEMPORARY CONSTRUCTION ENTRANCES SHALL BE INSTALLED WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND CLAREMONT LANE AND ALSO WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND FIELDING RUN DRIVE. 2. CONSTRUCTION ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTES SHALL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING. 3. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE INSTALLED DOWNSLIDE OF AREAS WITH MINIMAL GRADES TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE ATTACHED SITE PLAN. 4. TEMPORARY DIVERSION DIKES (3.09) - A SYSTEM OF DIVERSION DIKES TO DIRECT FLOW INTO THE SEDIMENT BASIN WILL BE INSTALLED AS SHOWN ON THE PLAN. 5. TEMPORARY SEDIMENT TRAPS (3.13) - TEMPORARY SEDIMENT TRAPS ARE TO BE CONSTRUCTED TO PROTECT THE ADJACENT AREAS FROM RECIEVING SEDIMENT LADEN RUNOFF. AREAS THAT ARE NOT DENUDED SHALL BE DIVERTED FROM DRAINING INTO THE SEDIMENT TRAPS, UNTIL SUCH TIME THAT THE DISTURBED AREAS ARE DEVELOPED AND STABILIZED. ACTUAL LOCATIONS AND DIMENSIONS OF THE EMBANKMENTS AND SPILLWAYS ARE SHOWN ON THE SITE PLAN. CALCULATIONS FOR THE SEDIMENT TRAPS ARE SHOWN WITH THE DETAILS. 6. STORMWATER CONVEYANCE CHANNEL (3.17) - A SERIES OF CHANNELS SHALL BE CONSTRUCTED TO PROVIDE FOR THE CONVEYANCE OF CONCENTRATED RUNOFF TO A RECEIVING CHANNEL WITHOUT DAMAGE FROM EROSION. TYPICAL DITCH SECTIONS & CALCULATIONS ARE SHOWN ON THE PLAN. 7. CHECK DAM (3.20) - SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSLOPE OF THE SEDIMENT BASIN AND TRAPS TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASIN AND TRAPS. WHEN THE SEDIMENT REACHES THE CLEANOUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 8. STORMWATER CONVEYANCE CHANNELS: 1.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 1.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 1.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 9. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 10, ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 11. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE OWNER TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.29- ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES_ 2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 4. MULCH 3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 5. EROSION CONTROL BLANKETS (3.36) - EROSION CONTROL BLANKETS WILL BE INSTALLED ON FILL SLOPES WITH A SLOPE GREATER THAN 2:1 FOLLOWING FINAL GRADING AND SEEDING. EROSION CONTROL BLANKETS WILL ALSO BE INSTALLED IN DITCHES WHERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY ENGINEERING CALCULATIONS. THIS WILL PROTECT FROM RILL AND GULLY EROSION. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 2. SEDIMENT TRAPPING MEASURES WILL BE INSTALLED AS THE FIRST STEP IN GRADING AND WILL BE SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. 3. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING. 4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 5. WITHIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND ANY SEDIMENT TRAPS OR SEDIMENT BASINS CANL BE CLEANED OUT OR CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS. PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEEDING IMMEDIATELY FOLLOWING FINISHED GRADING. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. STORMWATER RUNOFF CONSIDERATIONS CALCULATIONS OF RUNOFF BEFORE AND AFTER DEVELOPMENT INDICATE THAT THERE WILL BE A NET INCREASE IN RUNOFF VOLUME AS A RESULT OF THE INCREASE IN THE IMPERVIOUS SURFACES FOR THE DEVELOPMENT, THE EXISTING STORMWATER MANAGEMENT BASIN HAS BEEN DESIGNED TO TREAT AND RELEASE THE RUNOFF AT REDUCED RATES. REFER TO THE BLOCK 14 STORMWATER MANAGEMENT PLAN FOR DESIGN SIZING, CALCULATIONS, AND DESIGN DETAILS. MAINTENANCE IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 3. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 4. STORMWATER CONVEYANCE CHANNELS: 4.1, GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 4.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 4.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL, 5. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO ENSURE THAT THE CENTER OF THE CHECK DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. CALCULATIONS PLEASE REFER TO THE DETAILS, STORM SEWER AND HYDRAULIC CALCULATIONS FOR THE PERFORMANCE OF THE STORM SEWER, DITCHES, ASBUILT SEDIMENT BASIN AND SEDIMENT TRAPS. ALSO REFER TO THE WATER QUALITY CALCULATIONS FOR COMPLIANCE WITH THE CBPA REGULATIONS AND THE CORRESPONDING Retention Basin III SPECIFICATIONS AND THE REQUIRED 1.5, 2 AND 10 YEAR PRE -DEVELOPED DETENTION PROVIDED TO MEET THE MS -19 CRITERIA, ASSUMING GOOD FORESTED CONDITIONS. EC sjElQUENCE OF NS U 'ON 1.) CONTRACTOR SHALL VERIFY FUNCTIONALITY OF EXISTING SEDIMENT BASIN. CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION AS FIRST STEP IN CONSTRUCTION.(ASBUILTS HAVE BEEN PERFORMED TO VERIFY THE EXISTING BASIN VOLUME) 2.) CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE 3.) CONTRACTOR SHALL ROUGH GRADE THE SITE, INSTALL SEDIMENT TRAPS, DIVERSIONS AND PERIMETER SILT FENCE, AS SHOWN. 4.) CONTRACTOR SHALL INSTALL PROPOSED STORM SEWER TO CONVEY EXISTING UPSTREAM SITE RUNOFF TROUGH THE CONSTRUCTION AREA, AND BACK IN TO THE EXISTING PERIMETER DIVERSION DITCH INSTALLED AND MAINTAINED WITH BLOCK 14. ENSURE THAT THE EXISTING BLOCK 14 DIVERSION DITCH AND ACCOMPANYING FILL OPERATIONS MAINTAIN A CONTINUANCE CONVEYANCE CHANNEL INTO THE EXISTING SEDIMENT BASIN. 5.) BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS NECESSARY TO ACHIEVE FINAL GRADES, 6.) AFTER SITE HAS REACHED SUBGRADE CONDITIONS, INSTALL UTILITIES, REMAINING STORM SEWER AND BEGIN ROAD STABILIZATION AND CONSTRUCTION. 7.) PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN 60 DAYS. 8.) DURING SUMMER WEATHER WITH NO CHANCE OF RAINFALL, BEGIN SEDIMENT BASIN CONVERSION. COORDINATE WITH ENVIRONMENTAL INSPECTOR. SEE CONVERSION NOTES AND DETAILS. 9.) COORDINATE PERMANENT BERM SPECIFICATIONS WITH GEO-TECHNICAL ENGINEER. COMPACT BERM TO 95% COMPACTION AND/OR INSTALL CLAY CORE OR CUT-OFF TRENCH PER GEOTECH'S RECOMMENDATIONS. EXIST. BERM AND IMPROVEMENTS MUST BE CERTIFIED BY CEO TECHNICAL ENGINEER. 9.) THE INITIAL STEP IN THE CONVERSION OF THE EXISTING SEDIMENT BASIN SHALL BE CONSTRUCTION OF THE FOREBAY. THE FOREBAY WILL ACT AS THE TEMPORARY RUNOFF CONTROL MEASURE DURING CONSTRUCTION OF THE PERMANENT FACILITY. BE SURE TO INSTALL OUTLET PROTECTION AT THE PIPE OUTFALL LOCATIONS SIMULTANEOUS WITH FOREBAY GRADING OPERATIONS. 10.) INSTALL FOREBAY WEIR WALL AND RIP -RAP TO FINALIZE IMPOUNDMENT AREA PRIOR TO REPLACEMENT OF CMP BARREL AND RISER, INCLUDING PROPOSED PERMANENT BMP APPURTENANCES. 11.) FINALIZE POND GRADING, INCLUDING AQUATIC BENCH, EMERGENCY SPILLWAY AND GRAVELED MAINTENANCE ACCESS DRIVE. INSTALL ORIFIi, WEIR AND ANTI -VORTEX DEVICE. ALLOW FOR THE APPLICATION OF 6"-8" OF TOPSOIL WHEN PREPARING FINAL GRADES. 12.) STABILIZE STEEPER SLOPES WITH WITH SOIL MATTING AS NECESSARY TO PROVIDE VEGETATIVE COVER. 13.) ONCE PERMISSION IS OBTAINED FROM THE EROSION CONTROL INSPECTOR, REMOVE SILT FENCING, INLET PROTECTION AND OTHER EC MEASURES. EROSION AND SEDIMENT CONTROL QUANTITIES 000000000 SAFETY FENCE 1-96 L.F. PAVED CONSTRUCTION 2 TOTAL CE 3.02 ENTRANCE W/ WASH RACE ®RS 3.03 CONSTRUCTION ROAD 381400 S.F. STABILIC'ATION 3.05 `x SILT FENCE 21412 L. F. 3.12DIVERSION 11353 L. F. 3.13 SEDIMENT TRAP 2 EACH $56 Liu SB 3.'13 SEDIMENT BASIN EGIIIIIim 21815 L:❑ SEDIMENT BASIN NARRATIVE 7❑m❑ ®❑❑ WP02'.01300021 • THIS IS A MODIFICATION TO A SEDIMENT BASIN ESTABLISHED WITH WP0F9012L0013. THE ❑EOMETRY OF THE OUTLET STRUCTURE HAS BEEN PRESERVED. • THE BASIN HAS BEEN ENLAR❑ED TO RECEIVE RUNOFF FROM 19.25 ACRES IN VARIOUS STA❑ES OF CONSTRUCTION. EXCAVATION IS BASED ON CREATIN❑ A BASIN LAR❑E ENOU❑H TO ALLOW THE CONSTRUCTION OF A COMBINATION BASIN / FOREBAY BIOFILTER. •• THE FUTURE SURFACE ELEVATION OF 636.0 WAS ENLAR❑ ED TO ALLOW THE CONSTRUCTION OF A LARDER BIOFILTEREAND FOREBAY. •• THE BASE OF THE SEDIMENT BASIN 1635.OLWAS ADEUSTED TO PROVIDE WET STORA❑E. • THE VOLUMES PROVIDED AT THE RISERCAND ORIFICE MEET OR EXCEED STORA❑E REQUIREMENTS FOR A SEDIMENT BASIN. • SCS ROUTIN❑S DEMONSTRATE THE STORA❑E VOLUMED ORIFICELAND RISER ALLOW FOR THE FULLY DEVELOPED 25[YEAR STORM TO PASS WITHOUT EXCEEDIN❑ THE ELEVATION OF THE EMER❑ENCY SPILLWAY. • THE PROPOSED ❑EOMETRY PROVIDES ADEQUATE STORA❑E TO LIMIT DISCHAR❑E RATES TO THOSE SPECIFIED IN VA 10.1 L561. • THE 24" OUTLETLAND BERM ❑EOMETRY IS TO BE PRESERVED UPON CONVERSION TO A COMBINATION BASIN / 111117 �yTx of '0 VOLUME (C.Y,) V-44.i 10.:25 ACRES BRING MATERIAL DOWN 'TIO A LEVEL AREA BEFORE 1,3:00 G.Y. BASE ELEVATION 784"TiNG THE INSTALLA7M TURN THE END C. Mulligan Lic. No. r 031672 o�FSs �NG�� I0L NA UNDER 4• AND STAPLE AT !Y INTERVALS. 636.40' iK 1,4 39 C.Y. PROVIDED DEWATERING ORIFICE DIAME 1 ER 6" DEWATERING ORIFICE ELEVATION 6337.85" DRY STORAGE VOLUME 5,776 C.Y. PROVIDED RISER ELEVATION 640.90' IN DITCHES, APPLY PROTECTIVE COVERINIG PARALLEL TO THE DETECTION OF FLOW. USE CHECK SLOTS AS REQUIRED. AV= JOINING MATERIAL IN THE CENTER OF THE DITCH IF AT ALL P06SKEi SOURCE: ADAPTED FROM LUDLOW PRODUCT5 BROCMUKL Existinq Sediment Basin raw I L: %7•0v-1 OLD TRAIL SEDIMENT BASIN Block 14 Type 1124 -hr 100 -yr Rainfall=91.1 6" Prepared by Hewlett-Packard Company Printed 2/13/2015 H droCADO 10.00 s/n 08126 O 2013 H droCAD Software Solutions LLC Summary for Subcatchment 16S: Disturbed Area Sediment Basin Sized to accomodate Runoff - 167.25 cfs @ 12.09 hrs, Volume= 12.322 af, Depth> 7.68" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type 1124 -hr 100 -yr Rainfall=9.16" Area ac CN Description 19.250 88 Fallow, bare soil, HSG BIC 19.250 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.4 300 0,0520 0.37 Sheet Flow, Range n= 0.130 P2= 3.68„ 3.8 445 0.0780 1.95 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 17.2 745 Total OLD TRAIL SEDIMENT BASIN Black 14 Type li 24 -hr 100 -yr Rainfall=9-10" Prepared by Hewlett-Packard Company Printed 2/13/2015 HydroCAD® 10.00 s/n 08126 © 2013 HydroCAD Software Solutions LLC Events for Pond 14P: 11-28-2014 Asbuilts Event Inflow Primary Elevation Storage (cfs) (cfs) (feet) (cubic -feet) 1 -yr 42.93 20.76 643.10 117,409 2 -yr 55.93 25.26 643.64 129,140 5 -yr 77.01 27.21 644.70 153,264 10 -yr 94.62 28.81 645.62 175,308 25 -yr 120.52 31.03 646.99 209,564 50 -yr 142.83 107.72 752.95 209,715 100 -yr 157.25 195.40 1,032.41 209,716 I, PRIOR TO CONSTRUCTION 1.) CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE RIGHT-OF-WAY (VDOT LAND -USE PERMIT). 2.) CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF CONSERVATION AND RECREATION(DCR). 3.) CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION. A PRECONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND SCHEDULING OF PRE -CONSTRUCTION MEETING. PROJECT DESCRIPTION THE PURPOSE OF THIS PROJECT IS TO CONSTRUCT EIGHTEEN SINGLE FAMILY DETACHED DWELLINGS, UTILITY SERVICES AND ROAD FRONTAGE AND SUBSEQUENT INFRASTRUCTURE. ALL EXISTING AND PROPOSED RUNOFF FROM THE DEVELOPMENT WITHIN THIS SECTION WILL OUTFALL TO THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS. THE EXISTING SEDIMENT BASIN AND PROPOSED SEDIMENT TRAPS WERE SIZED TO ACCOMMODATE ALL OF THE NEW DEVELOPMENT ON THE SOUTHEASTERN SIDE OF OLD TRAIL DRIVE. ADDITIONAL DIVERSIONS SHALL BE INTRODUCED TO DIRECT AND CAPTURE ALL RUNOFF FROM ALL DENUDED AREAS. A CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION SHALL BE IMPLEMENTED AS THE FIRST STEPS TO DIRECT SEDIMENT LATENT WATER FROM THE DENUDED AREAS TO THE EXISTING SEDIMENT BASIN. THE LIMITS OF DISTURBANCE INCLUDES APPROXIMATELY 12 ACRES OF LAND DISTURBING ACTIVITIES; ALL LAND DISTURBING ACTIVITIES HEREIN ARE SURROUNDED BY EXISTING PAVED ROADS AND STORM SEWER, WHERE EXISTING RUN-OFF IS CONVEYED. EXISTING SITE CONDITIONS CURRENTLY THE DISTURBED AREA IS MOSTLY OPEN AND GRASS COVERED. THE EXISTING SEDIMENT BASIN IS CURRENTLY RECEIVING THE SITE'S RUNOFF, AND WILL CONTINUE TO DO SO THROUGHOUT CONSTRUCTION. THE INSTALLATION AND MAINTENANCE OF THE SILT FENCE AND INLET PROTECTION THROUGHOUT CONSTRUCTION IS CRITICAL TO PREVENTING SEDIMENT LATENT RUNOFF FROM EXITING THE SITE. THERE ARE ALSO SMALL PORTIONS OF THE ADJACENTLY GRADED, BUT STABILIZED AREAS TO THE NORTH OF THE SITE THAT DRAIN TO THE SEDIMENT BASIN. ADJACENT AREAS OLD TRAIL DRIVE FORMS THE WESTERN BORDER, TRIBUTARIES OF THE LICKINGHOLE CREEK LIE TO THE NORTH, AND EAST. BLOCK 15 OF THE OLD TRAIL SUBDIVISION LIES TO THE SOUTHEAST. STOCKPILE AREAS ARE LOCATED ON THE EASTERN SIDE OF BLOCKS 13 AND 14. STAGING AREAS WILL BE LOCATED IN EITHER FUTURE BLOCK 12, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND CLAREMONT LANE, OR IN FUTURE BLOCK 18, NEAR THE INTERSECTION OF GLEN VALLEY DRIVE AND FIELDING RUN DRIVE. OFF-SITE AREAS NO CONSTRUCTION OUTSIDE THE LIMITS OF CLEARING AND GRADING SHOWN IS REQUIRED. ANY SURPLUS OR SHORTAGE SHALL BE BROUGHT TO OR OBTAINED FROM A SITE WITH APPROVED E&S MEASURES IN PLACE. ALL EXCESS MATERIAL SHALL BE HAULED TO AN APPROVED SITE WITH ADEQUATE EROSION CONTROL PROTECTION. AN OFF-SITE BORROW OR FILL SITE WILL NOT BE NECESSARY, SINCE THERE ARE STOCKPILE AREAS OF FILL NEAR THE CONSTRUCTION AREA (ADJACENT TO BLOCKS 13 AND 14). SOILS 4D - ASHE LOAM - 15% TO 25% SOIL IS RELATIVELY DEEP, HEAVILY SLOPING AND SOMEWHAT EXCESSIVELY DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS VERY LOW TO HIGH AND WATER CAPACITY IS LOW. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 25B - DYKE SILT LOAM - 2% TO 7% SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY AND WATER CAPACITY ARE MODERATE. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM, 26C3 - DYKE CLAY LOAM - 7% TO 15%, SEVERELY ERODED SOIL IS DEEP, MODERATELY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. 37D3 - HAYESVILLE CLAY LOAM - 15% TO 25%, SEVERELY ERODED SOIL IS DEEP, HEAVILY SLOPING AND WELL -DRAINED, AND IS IN HYDROLOGIC GROUP B. PERMEABILITY IS MODERATELY HIGH TO HIGH AND WATER CAPACITY IS HIGH. SURFACE RUNOFF AND EROSION HAZARD ARE MEDIUM. CRITICAL SLOPE AREAS CRITICAL SLOPE AREAS EXIST ON THIS SITE. MOST OF THE AREAS OF 'PRESERVED' CRITICAL SLOPE ARE LOCATED WITHIN THE 100' STREAM BUFFER AND NO LAND DISTURBING ACTIVITY WILL BE TAKING PLACE OVER THESE AREAS. THERE IS, HOWEVER, ABOUT A 200 S.F. AREA LOCATED JUST OUTSIDE OF THE 100' STREAM BUFFER THAT IS GOING TO HAVE LAND DISTURBANCE ACTIVITY TAKING PLACE ON IT. PARTICULAR CARE SHALL BE TAKEN ON THE FILL SLOPES AND DITCHES TO ENSURE ADEQUATE VEGETATION IS ESTABLISHED AND ALL DENUDED AREAS ARE PREVENTED UNCONTROLLED RUN OFF FROM GETTING INTO SLABTOWN BRANCH. EROSION AND SEDIMENT CONTROL MEASURES UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, LATEST EDITION. THE MINIMUM STANDARDS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL REGULATIONS SHALL BE ADHERED TO UNLESS OTHERWISE WAIVED OR APPROVED BY A VARIANCE. STRUCTURAL PRACTICES 1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) -TWO TEMPORARY CONSTRUCTION ENTRANCES SHALL BE INSTALLED WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND CLAREMONT LANE AND ALSO WHERE THE ACCESS ROAD INTERSECTS WITH GLEN VALLEY ROAD AND FIELDING RUN DRIVE. 2. CONSTRUCTION ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND OTHER ON-SITE VEHICLE TRANSPORTATION ROUTES SHALL BE STABILIZED WITH STONE IMMEDIATELY AFTER GRADING. 3. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE INSTALLED DOWNSLIDE OF AREAS WITH MINIMAL GRADES TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED ON THE ATTACHED SITE PLAN. 4. TEMPORARY DIVERSION DIKES (3.09) - A SYSTEM OF DIVERSION DIKES TO DIRECT FLOW INTO THE SEDIMENT BASIN WILL BE INSTALLED AS SHOWN ON THE PLAN. 5. TEMPORARY SEDIMENT TRAPS (3.13) - TEMPORARY SEDIMENT TRAPS ARE TO BE CONSTRUCTED TO PROTECT THE ADJACENT AREAS FROM RECIEVING SEDIMENT LADEN RUNOFF. AREAS THAT ARE NOT DENUDED SHALL BE DIVERTED FROM DRAINING INTO THE SEDIMENT TRAPS, UNTIL SUCH TIME THAT THE DISTURBED AREAS ARE DEVELOPED AND STABILIZED. ACTUAL LOCATIONS AND DIMENSIONS OF THE EMBANKMENTS AND SPILLWAYS ARE SHOWN ON THE SITE PLAN. CALCULATIONS FOR THE SEDIMENT TRAPS ARE SHOWN WITH THE DETAILS. 6. STORMWATER CONVEYANCE CHANNEL (3.17) - A SERIES OF CHANNELS SHALL BE CONSTRUCTED TO PROVIDE FOR THE CONVEYANCE OF CONCENTRATED RUNOFF TO A RECEIVING CHANNEL WITHOUT DAMAGE FROM EROSION. TYPICAL DITCH SECTIONS & CALCULATIONS ARE SHOWN ON THE PLAN. 7. CHECK DAM (3.20) - SEVERAL ROCK CHECK DAMS WILL BE INSTALLED UPSLOPE OF THE SEDIMENT BASIN AND TRAPS TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS WHICH WILL HELP INCREASE THE EFFECTIVENESS OF THE SEDIMENT BASIN AND TRAPS. WHEN THE SEDIMENT REACHES THE CLEANOUT LEVEL, IT SHALL BE REMOVED AND PROPERLY DISPOSED OF. 8. STORMWATER CONVEYANCE CHANNELS: 1.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 1.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 1.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL. 9. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO INSURE TECH CENTER OF TECH DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 10, ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. 11. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED REGULARLY BY THE OWNER TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN DAMAGED BY EROSION. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF 15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING. VEGETATIVE PRACTICES 1. SURFACE ROUGHENING (3.29- ALL AREAS WITH A GRADE STEEPER THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE 3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE INFILTRATION, AND TO SLOW RUNOFF VELOCITIES_ 2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER PERIMETER TO PROTECT DOWNSTREAM AREAS. 3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS SHALL BE STABILIZED WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 4. MULCH 3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS, OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. 5. EROSION CONTROL BLANKETS (3.36) - EROSION CONTROL BLANKETS WILL BE INSTALLED ON FILL SLOPES WITH A SLOPE GREATER THAN 2:1 FOLLOWING FINAL GRADING AND SEEDING. EROSION CONTROL BLANKETS WILL ALSO BE INSTALLED IN DITCHES WHERE POTENTIAL EROSIVE VELOCITIES MAY EXIST AS DETERMINED BY ENGINEERING CALCULATIONS. THIS WILL PROTECT FROM RILL AND GULLY EROSION. MANAGEMENT STRATEGIES 1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE. 2. SEDIMENT TRAPPING MEASURES WILL BE INSTALLED AS THE FIRST STEP IN GRADING AND WILL BE SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION. 3. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING. 4. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES. 5. WITHIN 30 DAYS AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR REMOVED, AND ANY SEDIMENT TRAPS OR SEDIMENT BASINS CANL BE CLEANED OUT OR CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS. PERMANENT STABILIZATION ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH STRAW & SEEDING IMMEDIATELY FOLLOWING FINISHED GRADING. SEEDING SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF STRAW IS TO BE USED. STORMWATER RUNOFF CONSIDERATIONS CALCULATIONS OF RUNOFF BEFORE AND AFTER DEVELOPMENT INDICATE THAT THERE WILL BE A NET INCREASE IN RUNOFF VOLUME AS A RESULT OF THE INCREASE IN THE IMPERVIOUS SURFACES FOR THE DEVELOPMENT, THE EXISTING STORMWATER MANAGEMENT BASIN HAS BEEN DESIGNED TO TREAT AND RELEASE THE RUNOFF AT REDUCED RATES. REFER TO THE BLOCK 14 STORMWATER MANAGEMENT PLAN FOR DESIGN SIZING, CALCULATIONS, AND DESIGN DETAILS. MAINTENANCE IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR: 1. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL BUILDUP. IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND FAILS TO PREVENT TRANSPORTATION OF SOIL ONTO THE ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A WASH -RACK MAY BE REQUIRED. 2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED. 3. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED. DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY. 4. STORMWATER CONVEYANCE CHANNELS: 4.1, GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT, GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT DAMAGE THE GRASS. 4.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO DETERMINE THE STONES ARE NOT DISLODGED BY LARGE FLOWS. 4.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL, 5. CHECK DAMS SHALL BE CHECKED FOR SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR INSPECTIONS SHALL BE MADE TO ENSURE THAT THE CENTER OF THE CHECK DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED IMMEDIATELY. 6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RE -SEEDED AS NEEDED. CALCULATIONS PLEASE REFER TO THE DETAILS, STORM SEWER AND HYDRAULIC CALCULATIONS FOR THE PERFORMANCE OF THE STORM SEWER, DITCHES, ASBUILT SEDIMENT BASIN AND SEDIMENT TRAPS. ALSO REFER TO THE WATER QUALITY CALCULATIONS FOR COMPLIANCE WITH THE CBPA REGULATIONS AND THE CORRESPONDING Retention Basin III SPECIFICATIONS AND THE REQUIRED 1.5, 2 AND 10 YEAR PRE -DEVELOPED DETENTION PROVIDED TO MEET THE MS -19 CRITERIA, ASSUMING GOOD FORESTED CONDITIONS. EC sjElQUENCE OF NS U 'ON 1.) CONTRACTOR SHALL VERIFY FUNCTIONALITY OF EXISTING SEDIMENT BASIN. CONTRACTOR SHALL THEN INSTALL CONSTRUCTION ENTRANCE, SILT FENCE AND INLET PROTECTION AS FIRST STEP IN CONSTRUCTION.(ASBUILTS HAVE BEEN PERFORMED TO VERIFY THE EXISTING BASIN VOLUME) 2.) CONTRACTOR SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE 3.) CONTRACTOR SHALL ROUGH GRADE THE SITE, INSTALL SEDIMENT TRAPS, DIVERSIONS AND PERIMETER SILT FENCE, AS SHOWN. 4.) CONTRACTOR SHALL INSTALL PROPOSED STORM SEWER TO CONVEY EXISTING UPSTREAM SITE RUNOFF TROUGH THE CONSTRUCTION AREA, AND BACK IN TO THE EXISTING PERIMETER DIVERSION DITCH INSTALLED AND MAINTAINED WITH BLOCK 14. ENSURE THAT THE EXISTING BLOCK 14 DIVERSION DITCH AND ACCOMPANYING FILL OPERATIONS MAINTAIN A CONTINUANCE CONVEYANCE CHANNEL INTO THE EXISTING SEDIMENT BASIN. 5.) BEGIN CLEARING, GRUBBING AND FINE GRADING OPERATIONS AS NECESSARY TO ACHIEVE FINAL GRADES, 6.) AFTER SITE HAS REACHED SUBGRADE CONDITIONS, INSTALL UTILITIES, REMAINING STORM SEWER AND BEGIN ROAD STABILIZATION AND CONSTRUCTION. 7.) PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN 60 DAYS. 8.) DURING SUMMER WEATHER WITH NO CHANCE OF RAINFALL, BEGIN SEDIMENT BASIN CONVERSION. COORDINATE WITH ENVIRONMENTAL INSPECTOR. SEE CONVERSION NOTES AND DETAILS. 9.) COORDINATE PERMANENT BERM SPECIFICATIONS WITH GEO-TECHNICAL ENGINEER. COMPACT BERM TO 95% COMPACTION AND/OR INSTALL CLAY CORE OR CUT-OFF TRENCH PER GEOTECH'S RECOMMENDATIONS. EXIST. BERM AND IMPROVEMENTS MUST BE CERTIFIED BY CEO TECHNICAL ENGINEER. 9.) THE INITIAL STEP IN THE CONVERSION OF THE EXISTING SEDIMENT BASIN SHALL BE CONSTRUCTION OF THE FOREBAY. THE FOREBAY WILL ACT AS THE TEMPORARY RUNOFF CONTROL MEASURE DURING CONSTRUCTION OF THE PERMANENT FACILITY. BE SURE TO INSTALL OUTLET PROTECTION AT THE PIPE OUTFALL LOCATIONS SIMULTANEOUS WITH FOREBAY GRADING OPERATIONS. 10.) INSTALL FOREBAY WEIR WALL AND RIP -RAP TO FINALIZE IMPOUNDMENT AREA PRIOR TO REPLACEMENT OF CMP BARREL AND RISER, INCLUDING PROPOSED PERMANENT BMP APPURTENANCES. 11.) FINALIZE POND GRADING, INCLUDING AQUATIC BENCH, EMERGENCY SPILLWAY AND GRAVELED MAINTENANCE ACCESS DRIVE. INSTALL ORIFIi, WEIR AND ANTI -VORTEX DEVICE. ALLOW FOR THE APPLICATION OF 6"-8" OF TOPSOIL WHEN PREPARING FINAL GRADES. 12.) STABILIZE STEEPER SLOPES WITH WITH SOIL MATTING AS NECESSARY TO PROVIDE VEGETATIVE COVER. 13.) ONCE PERMISSION IS OBTAINED FROM THE EROSION CONTROL INSPECTOR, REMOVE SILT FENCING, INLET PROTECTION AND OTHER EC MEASURES. EROSION AND SEDIMENT CONTROL QUANTITIES 000000000 SAFETY FENCE 1-96 L.F. PAVED CONSTRUCTION 2 TOTAL CE 3.02 ENTRANCE W/ WASH RACE ®RS 3.03 CONSTRUCTION ROAD 381400 S.F. STABILIC'ATION 3.05 `x SILT FENCE 21412 L. F. 3.12DIVERSION 11353 L. F. 3.13 SEDIMENT TRAP 2 EACH $56 Liu SB 3.'13 SEDIMENT BASIN EGIIIIIim 21815 L:❑ SEDIMENT BASIN NARRATIVE 7❑m❑ ®❑❑ WP02'.01300021 • THIS IS A MODIFICATION TO A SEDIMENT BASIN ESTABLISHED WITH WP0F9012L0013. THE ❑EOMETRY OF THE OUTLET STRUCTURE HAS BEEN PRESERVED. • THE BASIN HAS BEEN ENLAR❑ED TO RECEIVE RUNOFF FROM 19.25 ACRES IN VARIOUS STA❑ES OF CONSTRUCTION. EXCAVATION IS BASED ON CREATIN❑ A BASIN LAR❑E ENOU❑H TO ALLOW THE CONSTRUCTION OF A COMBINATION BASIN / FOREBAY BIOFILTER. •• THE FUTURE SURFACE ELEVATION OF 636.0 WAS ENLAR❑ ED TO ALLOW THE CONSTRUCTION OF A LARDER BIOFILTEREAND FOREBAY. •• THE BASE OF THE SEDIMENT BASIN 1635.OLWAS ADEUSTED TO PROVIDE WET STORA❑E. • THE VOLUMES PROVIDED AT THE RISERCAND ORIFICE MEET OR EXCEED STORA❑E REQUIREMENTS FOR A SEDIMENT BASIN. • SCS ROUTIN❑S DEMONSTRATE THE STORA❑E VOLUMED ORIFICELAND RISER ALLOW FOR THE FULLY DEVELOPED 25[YEAR STORM TO PASS WITHOUT EXCEEDIN❑ THE ELEVATION OF THE EMER❑ENCY SPILLWAY. • THE PROPOSED ❑EOMETRY PROVIDES ADEQUATE STORA❑E TO LIMIT DISCHAR❑E RATES TO THOSE SPECIFIED IN VA 10.1 L561. • THE 24" OUTLETLAND BERM ❑EOMETRY IS TO BE PRESERVED UPON CONVERSION TO A COMBINATION BASIN / 111117 �yTx of '0 VOLUME (C.Y,) DRAINAGE AREA 10.:25 ACRES WET/DRY STORAGE @ 67 C.YJAC:, 1,3:00 G.Y. BASE ELEVATION Christopher C. Mulligan Lic. No. r 031672 o�FSs �NG�� I0L NA D 3.20 -ir ROC1' CHECi_,! DAMS 5 TOTAL MODIFIED CHECL] DAM MOP 3.20 - W/ SILT FENCE 3 TOTAL LSEE DETAIL❑ 3.31 TS TEMPORARY SEEDING; 1241283 S.F. �S 3 32 PS PERMANENT SEEDIN❑ 2441843 S.F. �7 TOTAL DISTURBED AREA ❑ 23.5 ACRES SEQUENCE OF CONSTRUCTION❑[ -❑C❑❑ T❑❑ WP0201300021 ❑ 1 ClNSTALL CONSTRUCTION ENTRANCE. 2CSEDIMENT BASIN EXCAVATION. EXCESS MATERIAL WILL BE USED TO ESTABLISH THE 3r1 SLOPES UPHILL FROM THE EXISTIN❑ BASIN. APPLY FERTLI❑ER❑TEMPRARY SEEDIN❑ENAD MULCH. 3CDITCH CONSTRUCTION SHALL BED IN AT THE SEDIMENT BASIN LAND PROCEED UPHILL. NO MORE THAN 500' OF DITCH SHALL BE UNDER CONSTRUCTION AT ANY ❑ IVEN TIME. A❑SILT FENCE SHALL BE INSTALLED ON THE DOWNHILL SIDE. B❑CONSTRUCT THE DIVERSION. C❑FINAL [IRADE THE BERMLAND DITCH BOTTOM, D❑INSTALL DITCH LININ❑S AND CHEC❑ DAMS E❑SEEDCFERTILI❑E-AND MULCH. ❑ S Ild 1111 ❑❑ER ❑❑E] ❑ ❑❑ AFM❑CIlTD ❑EFI❑ ❑a- 2014 IT❑m❑ ®❑❑ WP020130001 ❑ CONTOUR AREA VOLUME (C.Y,) DRAINAGE AREA 10.:25 ACRES WET/DRY STORAGE @ 67 C.YJAC:, 1,3:00 G.Y. BASE ELEVATION 635.00 CLEANOU 1 VOL UME 7411 C.Y. PROVIDED CLEANOUT ELEVATION 636.40' WET STORAGE VOLUME 1,4 39 C.Y. PROVIDED DEWATERING ORIFICE DIAME 1 ER 6" DEWATERING ORIFICE ELEVATION 6337.85" DRY STORAGE VOLUME 5,776 C.Y. PROVIDED RISER ELEVATION 640.90' 25 YR. STORM E:I._EVAFIC'N 642.40 SPILLWAY!dVIDTH ail' SPILLWAY ELEVATION `v`ATION 64 3A0' 100 YEAR ELEVATION 643.65 (1=%JI..LY DEVELOPED) TOP OF 1 Jd BERM 645,00* ELEVATION CONTOUR AREA VOLUME (C.Y,) I,M 635 12.,70£ 0 636 14,200 498 r GRAIN* 638 16,100 1,561 cu.yrl. 2,694 640 19,100 cu,yd. 3,998 cu.ydi 642 21,600 54,606 cu.yd; rX , I a>FI «CE< t� 644 24,400 6,3£31 cuyd. 645 25,700 WORST-CASE z I ELEVATION FLOWRATE CONDITIONS 2 YR, 638.10 1.O CFS 10 YR. 64200 3.0 CFS 19.25 AC. CN=73 25 YR. 642.40 13.2 CFS Tc=19 MIN. '100 YR. 643.65 67.8 CFS URC£: VA. DSWC WE7 STORAGE ELEVhI ION 640.00 % r s n p '1 4 d_a A .J' �7 -1- �'�Y , _� i t r, oil " f7 A 7' T r') _i r MA-11'CHES SEDIMEN_r BASIN (WPO 2012-0013) ❑ L_6 F-030 ❑ ❑ Pr❑❑d ❑d ❑ R❑J Cr[--][--[] :< < WA c1ESI"N HIGH W, EER PLATE. 3. 1 4- 2. _ .. h a I,M ELE J-1 V: r l '- (/ .T T .._; F tD'C-EP, r GRAIN* C E • 'ALL PERMANENT STRUCTURES SHALL BE REPLACED W1 RCP ❑ ❑N '_VATIONS WITH rX , I a>FI «CE< t� I MEPGENCY `SPILT....` AY :; i r / AC ea z I f, ri, L DRAINAGE f1KElt s INET VOLUME 35,276 CU. F1. 1,307 CU.YD, WIPE, - 35,276 CU. FT. 1,307 CUYD. PLATE. 3. 1 4- 2. .. h a o 0 J-1 V: r l '- (/ .T T .._; F tD'C-EP, _. C E • 'ALL PERMANENT STRUCTURES SHALL BE REPLACED W1 RCP ❑ ❑N '_VATIONS WITH I MEPGENCY `SPILT....` AY L DRAINAGE f1KElt AC 1J_2S;eC INET VOLUME 35,276 CU. F1. 1,307 CU.YD, DRY VOLUME 35,276 CU. FT. 1,307 CUYD. Di:6,�"JDOWN FLOW (6 HR) 1.63 CFS, WE7 STORAGE ELEVhI ION 640.00 ORIFICE INV. 637.85 a DEPTI I 1.90 FT. AVERAGE DEPTH 0.95 FT. a ORIFICE SIZE: 6.0 IN, ORIFICE AREA (SQ.FT) 0.20 A=16,100 S.F. ORIFICE VELOCITY 4.69FTJSEC. L 120 AVERAGE DISCI IA G'E 0.92 CFS, AVG, ww We=134 DRAWDOWN TIME 10.64 HR. L we=0.80 NOTE: USING AN 8" ORIFICE RESULTS IN A i BAFFLES REQUIRED DRAWDOWN TIME LESS THAN 6 HRS. PLATE. 3. 1 4- 2. DATrE� 2 May B, 014 J i i I i i FILE NUMBER 3053 SHEET 11/14 IIS it • L a a • ww • i .. DATrE� 2 May B, 014 J i i I i i FILE NUMBER 3053 SHEET 11/14 STREAM BUFFER MITI❑ATION RESTORATION REQUIREMENTS STREAM BUFFER AREA DISTURBED = 21,500 SF (0.49 AC) MITIGATION AREA REQUIRED = 43,000 SF (0.99 AC) MITIGATION AREA PROVIDED = 43,026 SF (0.99 AC) MITIGATION AREA 1 = 8,968 SF (0.21 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 254 BARE ROOT SEEDLINGS MITIGATION AREA 2 = 11,526 SF (0.26 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 315 BARE ROOT SEEDLINGS MITIGATION AREA 3 = 16,607 SF (0.38 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 460 BARE ROOT SEEDLINGS MITIGATION AREA 4 = 5925 SF (0.14 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 165 BARE ROOOT SEEDLINGS PLANT SCHEDULE CETREES CMITI❑ATION AREAS 11311 QNTY. BOTANICAL NAME COMMON NAME SIDE/ COMMENTS 90 Acernegundo BOX ELDER 1 -YEAR OLD BARE -ROOT SEEDLINGS 175 Acerrubrum RED MAPLE 120 Betula nigra RIVER BIRCH 105 Celtis occidentalis COMMON HACKBERRY 90 Juglans nigra BLACK WALNUT 115 Liquidembarstyraciflua SWEETGUM 135 briodendron tulipifera TULIP POPLAR 110 Nyssa sylvatica BLACKGUM 175 Platanus occidentalis AMERICAN SYCAMORE 145 Quercus phellos WILLOW OAK PLANT SCHEDULE LESEEDIN❑ MIX ❑ OF MIX BOTANICAL NAME COMMON NAME COMMENT 22 Chasmanthium latifolium Sorghastrum nutans Elymus virginicus Panicum rigidulum Andropogon gerardii Panicuim anceps Panicum virgatum Agrostis perennans Aronia melanocarpa Viburnum lentago Comus amomum Senna hebecarpa Eupatorium perfoliatum Eupatorium fistulosum Eupatorium coelestinum Vernornia noveboracensis Rudbeckia hirta Ceanothus americanus Helenium autumnale Asterlaevis Penstemon digitalis Apocynum cannabinum RIVER OATS INDIANGRASS VIRGINIA WILDRYE REDTOP PANICGRASS BIG BLUESTEM BEAKED PANICGRASS SWITCHGRASS AUTUMN BENTGRASS BLACK CHOKEBERRY NANNYBERRY SILKY DOGWOOD WILD SENNA BONIEST JOE PYE WEED MISTFLOWER NEW YORK IRONWEED BLACKEYED SUSAN NEW JERSEY TEA COMMON SNEEZEWEED SMOOTH BLUE ASTER TALL WHITE BEARDTONGUE INDIANHEMP 20 LBS. PER ACRE WITH A 30 LBS. PER ACRE COVER CROP OF SECALE CEREALS LCEREAL RYE❑ AREA 1 4.2 LBS SEED MIX W/ 6.3 LBS SECALE CEREALE AREA 2 5.2 LBS SEED MIX W/ [7 8 LBS SECALE CEREALE AREA 3 C.6 LBS SEED MIX W/ 11.4 LBS SECALE CEREALE 15 15 8 8 7 7 3 2 2 2 1 1 1 1 1 1 1 0.5 0.5 0.5 0.5 SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE TREE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING A NON—TOXIC, BIODEGRADABLE HERBICIDE TO CONTROL UNDESIRABLE VEGETATION. PRIOR TO TREE PLANTING AND SEEDING AT THE BEGINNING OF THE NEXT GROWING SEASON, THE GROUND SURFACE SHALL BE PREPARED AND ORDERED BY TILLING OR SCARIFYING TO A MINIMUM DEPTH OF 2". TEST SOIL PH; THE PH LEVEL WITHIN THE GENERALIZED ROOT ZONE OF STREAM BUFFER MITIGATION PLANTINGS SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE OF 6.0 TO 7.0. THE PH ADJUSTMENTS CAN BE MADE USING POWDERED LIME. ALL TREE SEEDLINGS SHALL BE BARE—ROOT, ONE YEAR OF AGE AND GROWN UNDER WET CULTIVATION CONDITION, WHERE PRACTICAL. PLANTING PATTERNS SHALL BE RANDOM AND MIXED FOR THE DIFFERENT TREE SPECIES WITH THE SPACING OF 5-7'. TREES SHALL BE PLANTED NO CLOSER THAN 5 FEET AND NO FURTHER THAN 100 FEET FROM THE TOP OF THE STREAM BANK ON BOTH SIDES OF THE CHANNEL. TREE SEEDLINGS SHOULD BE PLANTED AS SOON AS THE AMBIENT SOIL TEMPERATURE IS ABOVE 41* F THROUGH MAY. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE WHEREUPON THEY MAY BE USED AS MULCH UNLESS THEY ARE DISEASED. HOLES EXCAVATED FOR THE TREES SHALL BE 3—TIMES THE CONTAINER DIAMETER OR AT LEAST 6" WIDER THAN THE BARE ROOT DIAMETER. THE HOLES MAY BE EXCAVATED EITHER BY HAND SHOVEL OR BY POWER AUGER. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE TILLED OR AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. BROADCAST THE SUGGESTED SEED MIX BY HAND OR MACHINE EVENLY OVER THE PLANTING AREA AND COVER THE SEEDS WITH APPROXIMATELY 1/4—INCH OF SOIL USING A DISK OR OTHER IMPLEMENT. AFTER SEEDS ARE COVERED, THE SOIL SHOULD BE LIGHTLY ROLLED TO ENSURE A GOOD SEED TO SOIL CONTACT FOLLOWED BY APPLICATION OF CHOPPED AND BLOWN WHEAT STRAW MULCH. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS, I — �JTH 077 OAMMY MARIE GEORGE Z U No. 0406001817 pt SCALE 1" = 50' 50 25 0 50 100 SCALE IN FEET a REVISIONS July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 DATE May 9, 2014 SCALE 1 " = 50' CONTOUR INTERVAL 2 !Feet FI1LE NUMBER 8053 00 .. 2 z 0t ." a.,1 061 . i0 0 0 LLt �� •• U. J 0 ►r S 0 0 010 FI1LE NUMBER 8053 STREAM BUFFER MITI ❑ATION RESTORATION REQUIREMENTS STREAM BUFFER AREA DISTURBED = 21,500 SF (0.49 AC) MITIGATION AREA REQUIRED = 43,000 SF (0.99 AC) MITIGATION AREA PROVIDED = 43,026 SF (0.99 AC) MITIGATION AREA 1 = 8,968 SF (0.21 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 254 BARE ROOT SEEDLINGS MITIGATION AREA 2 = 11,526 SF (0.26 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC MITIGATION AREA 3 = 16,607 SF (0.38 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AQ PROVIDED. 4 0 BARE O T S D I G I I A I A A 4= 9 F 4 A ) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 165 BARE ROOOT SEEDLINGS REVISED MITIGATION AREA PROVIDED = 43.649 SF (1.00 AC) A MITIGATION AREA 3 = 12,979 SF (0.30 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC A4 PROVIDED: 363 BARE ROOT SEEDLINGS REVISED MITIGATION AREA 3 = 4,251 SF (0.10 AC) REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: 121 BARE ROOT SEEDLINGS PLANT SCHEDULE C1❑TREES [MITI❑ATION AREAS 133] QNTY. BOTANICAL NAME COMMON NAME SICE/ COMMENTS 90 ACTrEUE_rEdo BOX ELDER 1 [YEAR OLD BARECROOT SEEDLINES 115 ALit rDCrDC RED MAPLE 120 BL=jEl o RIVER BIRCH 105 CEM1:7 Z dGC9r COMMON HAC❑BERRY 90 LDMLIDONK7 BLACF' WALNUT 115 LffCCd177ojLial-mlc_n SWEETnUM 135 L©rZZdCCdralzzmm o TULIP POPLAR 110 NCC/_= BLACCi❑UM 1 F5 P��CCC'C�d=Z27 AMERICAN SYCAMORE 145 QCO'=CCGCMI D WILLOW OA❑ PLANT SCHEDULE LESEEDIN❑ MIX ❑ OF MIX BOTANICAL NAME -T COMMON NAME COMMENT 22 CC=ECOGLEC 1Y111TIED RIVER OATS INDIANERASS VIREINIA WILDRYE REDTOP PANICERASS Bin BLUESTEM BEAEED PANIC❑RASS SWITCHERASS AUTUMN BENT❑RASS BLACE CHOEEBERRY NANNYBERRY SIL❑Y DOGWOOD WILD SENNA BONIEST FOE PYE WEED MISTFLOWER NEW YORE IRONWEED BLAC❑EYED SUSAN NEW l ERSEY TEA COMMON SNEEEEWEED SMOOTH BLUE ASTER TALL WHITE BEARDTON❑UE INDIANHEMP 20 LBS. PER ACRE WITH A 30 LBS. PER ACRE COVER CROP OF SECALE CEREALE CCEREAL RYE❑ AREA 1 4.2 LBS SEED MIX W/ 6.3 LBS SECALE CEREALE AREA 2 5.2 LBS SEED MIX W/ C�8 LBS SECALE CEREALE AREA 3 a6 LBS SEED MIX W/ 11.4 LBS SECALE CEREALE 15 SCrCC7,_'2ECI LLUTCC 15 E"'T 1[%CaCCIIl% 17 8 POE= rff1d=L7 8 ACdrCma'alLCradz E PDEZTLrL7D MEMO PCCfr C EYLER] 3 AcrC=CrrcCCCJC 2 ACCCoi0EffCQrCD 2 l ffLtL7 ,C 17T=S0 2 ci �OCCCCCC 1 SCCCCCCCCQrL%C 1 EccrraTICO CCrQ mEl 1 EamzrCO =Ci�C 1 EEMETrED CL7E,=aCC 1 VcrCCCl/7CCC oaal-Effil 1 RCdCC�21CriC7 1 CCCICOCL07iCIDyfEIOCD 0.5 HC1C_ff1D CCMiCCCQO 0.5 AC[2r1bC 9 0.5 POLL= LIJdL l=N 0.5 ACC�CD IICCC UTj20 SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE TREE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING A NON-TOXIC, BIODEGRADABLE HERBICIDE TO CONTROL UNDESIRABLE VEGETATION. PRIOR TO TREE PLANTING AND SEEDING AT THE BEGINNING OF THE NEXT GROWING SEASON, THE GROUND SURFACE SHALL BE PREPARED AND ORDERED BY TILLING OR SCARIFYING TO A MINIMUM DEPTH OF 2". TEST SOIL PH; THE PH LEVEL WITHIN THE GENERALIZED ROOT ZONE OF STREAM BUFFER MITIGATION PLANTINGS SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE OF 6.0 TO 7.0. THE PH ADJUSTMENTS CAN BE MADE USING POWDERED LIME. ALL TREE SEEDLINGS SHALL BE BARE -ROOT, ONE YEAR OF AGE AND GROWN UNDER WET CULTIVATION CONDITION, WHERE PRACTICAL. PLANTING PATTERNS SHALL BE RANDOM AND MIXED FOR THE DIFFERENT TREE SPECIES WITH THE SPACING OF 5-7'. TREES SHALL BE PLANTED NO CLOSER THAN 5 FEET AND NO FURTHER THAN 100 FEET FROM THE TOP OF THE STREAM BANK ON BOTH SIDES OF THE CHANNEL, TREE SEEDLINGS SHOULD BE PLANTED AS SOON AS THE AMBIENT SOIL TEMPERATURE IS ABOVE 41' F THROUGH MAY. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND, PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE WHEREUPON THEY MAY BE USED AS MULCH UNLESS THEY ARE DISEASED. HOLES EXCAVATED FOR THE TREES SHALL BE 3 -TIMES THE CONTAINER DIAMETER OR AT LEAST 6" WIDER THAN THE BARE ROOT DIAMETER. THE HOLES MAY BE EXCAVATED EITHER BY HAND SHOVEL OR BY POWER AUGER. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE' SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE TILLED OR AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. BROADCAST THE SUGGESTED SEED MIX BY HAND OR MACHINE EVENLY OVER THE PLANTING AREA AND COVER THE SEEDS WITH APPROXIMATELY 1/4 -INCH OF SOIL USING A DISK OR OTHER IMPLEMENT. AFTER SEEDS ARE COVERED, THE SOIL SHOULD BE LIGHTLY ROLLED TO ENSURE A GOOD SEED TO SOIL CONTACT FOLLOWED BY APPLICATION OF CHOPPED AND BLOWN WHEAT STRAW MULCH. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS. -,TH op J L. agg • !t Lic. No. 22841 0�1 �SS10NAL EN SCALE 1" = 50' 50 25 0 50 100 SCALE IN FEET \`,' i A` IK s ,�\, .,i , / ap�•d ��='� ' �<��- -. �\� i /i fir.. /1 T-1 0.49 .. - , WPOIMPACTS 1IJLIIT E1_._i EIE TI - r , ° A i 113 t r' 1 (, , , i „ y _ f f July 30, 2014 Sept. 29, 2015 Nov. 09, 2015 Oct. 13, 2012" AMENDMENT TO WP0201500066 DATE May 9, 2014 SCALE 1 50' CONTOUR INTERVAL 2 Feet FILE NUMBER 8050 SHEET 4C U I ARE � FUTURE BLOCK 35 l I PLANT SCHEDULE -- TREES (MITIGATION AREAS 4) QNTY. BOTANICAL NAME COMMON NAME SIZE/ COMMENTS 24 Acer rubrum RED MAPLE 1 -YEAR OLD BARE -ROOT SEEDLINGS 5-7' RANDOM SPACING 25 Betula nigra RIVER BIRCH 20 L iquidambar styraciflua SWEETGUM 30 Liriodendron tulipifera TULIP POPLAR 23 Nyssa sy/vatica BLACKGUM 27 P/atanus occidentalis AMERICAN SYCAMORE 16 Quercus phellos WILLOW OAK PLANT SCHEDULE -- SEEDING MIX % OF MIX BOTANICAL NAME COMMON NAME COMMENT 22 Chasmanthium /atifolium RIVER OATS 20 LBS. PER ACRE WITH A 30 LBS. PER ACRE COVER CROP OF SECALE CEREALE (CEREAL RYE) AREA 4 2.8 LBS SEED MIX W/ 4.2 LBS SECALE CEREALE 15 Sorghastrum nutans INDIANGRASS 15 Elymus virginicus VIRGINIA WILDRYE 8 Panicum rigidu/um REDTOP PANICGRASS 8 Andropogongerardii BIG BLUESTEM 7 Panicum anceps BEAKED PANICGRASS 7 Panicum virgatum SWITCHGRASS 3 Agrostis perennans AUTUMN BENTGRASS 2 Aronia melanocarpa BLACK CHOKEBERRY 2 Viburnum lentago NANNYBERRY 2 Comus amomum SILKY DOGWOOD 1 Senna hebecarpa WILD SENNA 1 Eupatonum perfoliatum BONEST 1 Eupatonum frstulosum JOE PYE WEED 1 Eupatonum coe/estinum MISTFLOWER 1 Vemonia noveboracensis NEW YORK IRONWEED 1 Rudbeckia hirta BLACKEYED SUSAN 1 Ceanothus americanus NEW JERSEY TEA 0.5 Helenium autumnale COMMON SNEEZEWEED 0.5 Asterlaevis SMOOTH BLUE ASTER 0.5 Penstemon digitalis TALL WHITE BEARDTONGUE 0.5 Apocynum cannabinum INDIANHEMP SITE PREPARATION SHOULD BEGIN IN THE FALL PRIOR TO THE TREE PLANTING AND SEEDING IF IT IS NECESSARY TO KILL OFF ANY INVASIVE UNDESIRED SPECIES WITH HERBICIDES. UNDESIRED SPECIES MAY INCLUDE MULTIFLORA ROSE, HONEYSUCKLE AND OTHER SPECIES DEEMED TO BE INVASIVE BY THE VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION. THE HERBICIDE SHOULD BE APPLIED BY A LICENSED SPRAY TECHNICIAN USING A NON—TOXIC, BIODEGRADABLE HERBICIDE TO CONTROL UNDESIRABLE VEGETATION. PRIOR TO TREE PLANTING AND SEEDING AT THE BEGINNING OF THE NEXT GROWING SEASON, THE GROUND SURFACE SHALL BE PREPARED AND ORDERED BY TILLING OR SCARIFYING TO A MINIMUM DEPTH OF 2". TEST SOIL PH; THE PH LEVEL WITHIN THE GENERALIZED ROOT ZONE OF STREAM BUFFER MITIGATION PLANTINGS SHOULD BE TESTED AND BROUGHT TO WITHIN A RANGE' OF 6.0 TO 7.0. THE PH ADJUSTMENTS CAN BE MADE USING POWDERED LIME. ALL TREE SEEDLINGS SHALL BE BARE—ROOT, ONE YEAR OF AGE AND GROWN UNDER WET CULTIVATION CONDITION, WHERE PRACTICAL. PLANTING PATTERNS SHALL BE RANDOM AND MIXED FOR THE DIFFERENT TREE SPECIES WITH THE SPACING OF 5-7'. TREES SHALL BE PLANTED NO CLOSER THAN 5 FEET AND NO FURTHER THAN 100 FEET FROM THE TOP OF THE STREAM BANK ON BOTH SIDES OF THE CHANNEL. TREE SEEDLINGS SHOULD BE PLANTED AS SOON AS THE AMBIENT SOIL TEMPERATURE IS ABOVE 41' F THROUGH MAY. PLANTS SHALL REMAIN UPRIGHT DURING TRANSPORT/STORAGE. PLANTS STORED ONSITE MUST BE PLANTED WITHIN THREE DAYS OF DELIVERY. IN ADDITION, THE PLANTS SHOULD BE STORED IN A PROTECTED AREA UPON ARRIVAL IN ORDER TO SHADE THEM FROM EXPOSURE TO THE SUN AND DRYING WIND. PLANTS THAT CANNOT BE PLANTED IMMEDIATELY UPON DELIVERY SHALL BE KEPT WELL SHADED, PROTECTED, AND WATERED. ALL DAMAGED PLANTS SHALL BE REMOVED FROM STORAGE WHEREUPON THEY MAY BE USED AS MULCH UNLESS THEY ARE DISEASED. HOLES EXCAVATED FOR THE TREES SHALL BE 3—TIMES THE CONTAINER DIAMETER OR AT LEAST 6" WIDER THAN THE BARE ROOT DIAMETER. THE HOLES MAY BE EXCAVATED EITHER BY HAND SHOVEL OR BY POWER AUGER. EXCESS SOIL GENERATED FROM THE EXCAVATIONS SHALL BE DISPOSED OF RANDOMLY OVER THE SITE. THE PLANTS SHALL BE SET AT THE SAME DEPTH THAT THEY WERE GROWN IN AND THE TRUNK SHOULD BE SITUATED NEARLY PLUMB. AVOID PLANTING SEEDLINGS IN EXTREMELY DRY, HOT OR WINDING CONDITIONS. HEAT AND WIND CAN QUICKLY DRY OUT LEAVES AND ROOTS. WATER THE SOIL AROUND THE SEEDLINGS IMMEDIATELY AFTER PLANTING. AREAS COMPACTED BY FOOT OR VEHICLE TRAFFIC SHALL BE TILLED OR AERATED PRIOR TO RESEEDING AREA AFTER TREES HAVE BEEN PLANTED. BROADCAST THE SUGGESTED SEED MIX BY HAND OR MACHINE EVENLY OVER THE PLANTING AREA AND COVER THE SEEDS WITH APPROXIMATELY 1/4—INCH OF SOIL USING A DISK OR OTHER IMPLEMENT. AFTER SEEDS ARE COVERED, THE SOIL SHOULD BE LIGHTLY ROLLED TO ENSURE A GOOD SEED TO SOIL CONTACT FOLLOWED BY APPLICATION OF CHOPPED AND BLOWN WHEAT STRAW MULCH. NO STORAGE OF HERBICIDES OR OTHER AGRICULTURAL CHEMICALS SHALL BE PERMITTED NEAR THE PLANT STORAGE OR MITIGATION AREAS. AMMY MARIE GEORGE No. 0406001817 G ��sCA PE ARc�cC STREAM BUFFER MITIGATION RESTORATION STREAM- •- • DISTURBED :• • -• MITIGATION AREA REQUIRED = 43,000 SF (0.99 AC) MITIGATION AREA PROVIDED = 43,026 SF (0.99 AC) MITIGATION • 8,968 S t REQUIRED: 1,210 BARE ROOT SEEDLINGS PER AC PROVIDED: BARE RO AREA 2 = 11,526 SF (0.26 AC) REQUIRED:MITIGATION r:.. ROOT SEEDLINGSPER AC PROVIDED: 315 BARE ROOTSEEDLINGS MITIGATION AREA 3 = 16,607 REQUIRED: 1,210 BARE .O• AC PER PROVIDED: 460 Vii. ROOT SEEDLINGS i 1 MITIGATION [ r E l I. 5925 SF REQUIRED: 1,210 BARE ROOT SEEDLINGS PER ACPROVIDED: 165 BARE ROOOT SEEDLINGS rl REVISIONS DATE q 11riiay 9, 2014 I SCALE 1 "=50' CONTOUR INTERVAL 2 Feet FILE NUMBER 3053 L_____j SHEET 12A/ 14 i r MIA CL 4 0 od �' 11t s i LN LL co 1 *, �,. 4 FILE NUMBER 3053 L_____j SHEET 12A/ 14