HomeMy WebLinkAboutWPO201000033 Plan - Approved 2010-06-08GENERAL
NOTES
ENGINEER:
COLLINS ENGINEERING
AREA:
800 E. JEFFERSON STREET
PHASING.
CHARLOTTESVILLE, VA 22902
EROSION CONTROL PHASE I
TELEPHONE. (4J4)29J -2719
EROSION CEO,!" "rQ L PHASE II
FAX. (424)245 -OJ00
ZONING.
CONTACT MR. SCOTT COLLINS, P.E.
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EMAIL: scott@collins- engineering.com
OWNERS.
AVON PROPERTIES, LLC
PRE - APPLICATION MEETING FOR EARLY GRADING PERMIT 512412010
P.O..BOX 1467
RESIDENTIAL
CHARLOTTESVILLE, VA 22902
MOORE'S CREEK WATERSHED
DONNA MARIE JORDAN
PHYSICAL AND BOUNDARY.- THOMAS B. LINCOLN LAND SURVEYOR INC,
1775 AVON STREET EXTENDED
DATED 12122105.
CHARLOTTESVILLE, - VA 22902
DEVELOPER.
RI VERBEND MANAGEMENT COMPANY
PHYSICAL, TOPOGRAPHIC & BOUNDARY INFORMATION OUTSIDE LIMITS OF
CONTACT ALAN TAYLOR
THOMAS B. LINCOLN LAND SURVEYOR'S WORK WAS PROVIDED BY AERIAL
110 EAST MAIN STREET
TOPOGRAPHY. $ '
CHARLOTTESVILLE, VA 22902 -5220
NAD 8J
(4J4)29J -75J7
TAX MAP /PARCEL #
91 -14, 90 -J51, 90 -J5J & 90 -J5K
MAGISTERIAL:
SCOTTSVILLE DISTRICT
AREA:
9.24 AC.
PHASING.
PHASES I THROUGH IV SHALL OCCUR IN CONSECUTIVE ORDER AS NUMBERED
EROSION CONTROL PHASE I
IN ORDER TO COMPLY WITH AFFORDABLE HOUSING REQUIREMENTS. EARLY
EROSION CEO,!" "rQ L PHASE II
GRADING PERMIT E &S TO BE PERFORMED IN 2 PHASES.
ZONING.
PRD - ZMA- 2006 -005 APPROVED JUNE 1J, 2007
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VARIATION TO THE APPROVED PRD WAS APPROVED WITH THE PRELIMINARY
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PLAN FOR THIS PROJECT ON MAY 277H, 2010.
PRE - APPLICATION MEETING FOR EARLY GRADING PERMIT 512412010
USE.
RESIDENTIAL
WA TERSHf_D:
MOORE'S CREEK WATERSHED
TOPO do SURVEY.-
PHYSICAL AND BOUNDARY.- THOMAS B. LINCOLN LAND SURVEYOR INC,
DATED 12122105.
TOPOGRAPHIC: THOMAS B. LINCOLN LAND SURVEYOR INC., DATED 12122105
PHYSICAL, TOPOGRAPHIC & BOUNDARY INFORMATION OUTSIDE LIMITS OF
THOMAS B. LINCOLN LAND SURVEYOR'S WORK WAS PROVIDED BY AERIAL
THIS
TOPOGRAPHY. $ '
DA TUM.
NAD 8J
BENCHMARK:
BENCHMARK IS SURVEY CONTROL POINT DT-14, NAIL WITH FLASHER
L OCA TED A T NJ886228.20 AND El 1482674.79, ELEVA TION 574.16
EXISTING VEGETATION:
PROPERTY CONSISTS OF RESIDENTIAL HOMES, LAND THAT IS PARTIALLY
CLEARED, AND THE MAJORITY OF THE SITE IS FORESTED WITH LIGHT
UNDERBRUSH.
FLOODPL,lIN.
THERE IS NO FLOODPLAIN LOCATED ON THIS SITE. FEMA MAP ID
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EROSION CONTROL NOTES
PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
MEASURES:
UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT D
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
EXISTING CULVERT
STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE
AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND
WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF
CULVERT
PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING
THE V/ G /NIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
REGULATIONS VR 625 -02 -00 EROSION AND SEDIMENT CONTROL
DROP INLET & STRUCTURE NO.
3.01 SAFETY FENCE
REGULA 77ONS.
CURB
A PROTEC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE.
ES -2: THE PLAN APPROVING AU77-IORITY MUST BE NOTIFIED ONE WEEK PRIOR TO
TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC.
THE PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE
CURB & GUTTER
APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED
COMMENCEMENT OF LAND DIS77JRBING ACTIVITY, AND ONE WEEK PRIOR TO
UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC.
THE FINAL INSPECTION.
PROPOSED PAVEMENT
ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR
3.0.2 CONSTRUCTION ENTRANCE:
TO OR AS THE FIRST STEP IN CLEARING
EC -3A DITCH
A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF
ES -4: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL
VEHICULAR INGRESS AND EGRESS ON A CONSTRUCT70N SITE TO REDUCE THE AMOUNT OF
BE MAINTAINED ON THE SITE AT ALL TIMES.
DEPTH OF EC -3A DITCH
MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
ES- 5.•PRIOR TO COMMENCING LAND DISTURBING AC7VITIES IN AREAS OTHER THAN
CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE
INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED T0, OFF -SITE
EC -2 DITCH
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS
BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
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3,03 CONSTRUCTION ROAD STABILIZA710ft
SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND
DEPTH OF EC -2 DITCH
THE TEMPORARY STABILIZA77ON OF ACCESS ROADS, SUBDIVISION ROADS, PARKING AREAS, AND
APPROVAL BY THE PLAN APPROVING AUTHORITY.
OTHER SITE VEHICLE 7RANSPORT4770M ROUTES WITH STONE IMMEDIATELY AF7FR GRADING. TO
ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADD177ONAL
EARTH DITCH I
REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC DURING WET WEATHER
EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
"AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN
SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
DRIVEWAY CULVERT
THE 77ME OF INI77AL GRADING AND FINAL STABILIZA770N. USE WHEREVER STONE -BASE ROADS
ES-7.-ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
OR PARKING AREAS ARE CONSTRUCTED, WHETHER PERMANENT OR TEMPORARY, FOR USE BY
MEASURES AT ALL TIMES DURING LAND D157URBING AC77VlT7ES AND DURING
BENCH MARK
CONSTRUCTION TRAFFIC.
SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN
CLEARING LIMITS
3.05 SILT FENCE:
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED
APPROVED WATER FILTERING DEVICE.
ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, T19 INTERCEPT AND DETAIN
ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES
VDOT STANDARD STOP SIGN
SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN
C RUNOFF-PRODUCING
PERIODICALLY AND AFTER EACH RAINFALL EVENT
ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF
ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS
EXISTING CONTOUR
SHEET FLOWS AND LOW -TO- MODERATE LEVEL CHANNEL FLOWS. THE SILT FENCE BARRIERS
OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT
.
PROPOSED CONTOUR
LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY
AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION &
PROPOSED SPOT ELEVATION
SEDIMENT CON7ROL HANDBOOK (VESCH).
EROSION CONTROL NOTES
TBC DENOTES TOP /BACK OF CURB
3,09 TEMPORARY DIVERSION DIKE•
TAB DENOTES TOP OF BOX
A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING
1. THE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO THE
EROSION CON TRO
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DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM P
PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT D
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
* VIRGINIA EROSION & SEDIMENT CONTROL S
SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT- •TRAPPING FACILITY SUCH 2
2. A
ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONS7RUC7ED AND
�- HANDBOOK SPECIFICA77ON NUMBER AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER S7ORMW47ER RUNOFF MUST BE MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATONS OF THE VIRGINIA
* TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ,ON EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULAT70NS VT
S17E DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 625 -02 -00 EROSION AND SEDIMENT CONTROL REGULATIONS.
37RAW BAIL BARRIER 3.04 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. J. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS
THE FIRST STEP IN CLEARING.
TEMPORARY DIVERSION DIKE 3.09
3.13 TEMPORARY SEDIMENT TRAP. 4. A COPY OF 7HE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE
A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG AN EARTHEN EMBANKMENT WITH A MAINTAINED ON THE SITE AT ALL TIMES.
STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG 5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS 07H£R THAN INDICATED
TEMPORARY SEDIMENT TRAP 3.13 ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DIS71JRBED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE'
AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN
SEDIMENT BASIN 3.14 SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING' AUTHORITY.
EITHER INDEPENDENTLY OR IN CONJUNCTION WITH A TEMPORARY DIVERSION DIKE. 6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA7ON OF ANY ADD177ONAL EROSION
CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS
INLET PROTECTION J. J. 14 TEMPORARY SEDIMENT BASIN: DETERMINED BY THE PLAN APPROVING AUTHORITY.
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMWATER RELEASE STRUCTURE Z ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON7ROL MEASURES AT
J. FORMED BY CONSTRUC7ING AN EMBANKKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING SITE DEVELOPMENT UN77L
SILT FENCE TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `MIRY" STORAGE FINAL STABILIZATION IS ACHIEVED.
LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW 8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED
DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR FILTERING DEVICE.
N APPROPRIATE E SION CONTROL MEASURES PERIODICALLY AND
CONSTRUC770N ENTRANCE 3.02 GREATER THAN THREE ACRES. THERE' MUST BE SUFFICIENT SPACE AND 9. THE CONTRACTOR SHALL INSPECT ALL EROSION N
TOPOGRAPHY FOR THE CONS7RUC770N OF A TEMPORARY IMPOUNDMENT. AFTER EACH RUNOFF - PRODUCING RAINFALL EVENT ANY NECESSARY REPAIRS OR
CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL
CHECK DAM 3.20 3,18 OUTLET PROM277ON• BE MADE IMMEDIATELY.
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES PLACED 10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT 11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EAR7H FILL
TEMPORARY FILL DIVERSION 3.10 STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND
FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY' OF CONCENTRATED OTHER DEBRIS
STORMWA7FR FLOWS. APPLICABLE TO 7HE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL 12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLET70N PER
DIVERSION J. 12 SECTIONS ZONING ORDINANCE SEC77ON 5.1.28.
13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13 -301
J 19 RIPRAP. OF THE CODE OF ALBEMARLE. .
A PERMANENT, EROSION - RESISTANT GROUND COVER,OF LARGE, LOOSE, ANGULAR STONE WITH 14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT
PERMANENT SEEDING 3.32 FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE EROSIVE SHALL BE LIMITED TO THE HOURS OF 7.• 00 AM TO 9: 00 PM.
FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE 15. BORROW, FILL OR WASTE AC77VITY SHALL BE CONDUCTED IN A SAFE MANNER THAT
ENHANCING THE P07EN77AL FOR INFILTRATION, AND TO STABILIZE SLOPES Wl7H SEEPAGE MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS,
TOPSOILING 3.30 PROBLEMS, AND /OR NON- COHESIVE SOILS. USE W�iKMEVER SOIL AND WATER INTERFACE AND PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY
THE SOIL CONDIT70NS, WATER TURBULENCE AND VELvUITY, EXPECTED VEGETA77VE COVER, ETC, PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE
ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS 16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR
CULVERT INLET PRO TEC7ON 3.08 CONVERT TO PERMANENT STORMWATER MANAGEMENT FACIL177ES WHERE APPLICABLE ALL
J.31 TEMPORARY SEEDING: EROSION CON7ROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF
. 7HE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY.
DUST CONTROL 3.39 WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND 17. TEMPORARY STABILIZA77ON SHALL BE 7EMPORARY SEEDING AND MULCHING. SEEDING IS
SEDIMENTA71ON BY STABILIZING DISTURBED AREAS MAT WILL NOT BE BROUGHT TO FINAL TO BE AT 75 LBS /ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO
GRADE FOR A PERIOD OF MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND CONSIST A 50150 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH
RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF
TEMPORARY SLOPE DRAIN 3.15 EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTFRNA77VES ARE
MEASURES CAN BE ESTABLISHED. SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND
332 PERMANENT STABILIZARON: MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS /1000SF,
SAFETY FENCE 3.01 THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLANTING
SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO INCORPORATED INTO THE TOP 4 -6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO 1000LBS /ACRE AND CONSIST OF A 10 -20 -10 NUTRIENT MIX. PERMANENT SEEDING
TEMPORARY RIGHT -OF -WAY 3.11 SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MA7ERIALS. TO SHALL BE APPLIED AT PERENNIAL AND CONSIST OF B5% KENTUCKY 31 OR TALL
DIVERSION IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF FESCUE AND 0 -5% PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS S 7RAW MULCH IS
CONS7RUCTION ACTIV177ES, ALL AREAS WILL RECEIVE A PERMANENT VF-GETA71VE COVER. TO BE APPLIED AT 8OLBS /10OSF, AL7LRNA77VES ARE SUBJECT TO APPROVAL BY THE
EROSION CONTROL INSPECTOR.
3.35 MULCHING: 19. MAINTENANCE, ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH
APPLICATION OF PLANT RESIDUES OR (OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS X0 BE REPAIRED
PREVENT EROSION BY PR07EC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WE7T STORAGE
VOLUME lS FILLED WiTN SEDMAAE'NT ALL SEEDED AREAS ARE TO BE RESEEDED WHEN
TABLE 331 -A THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETA7ON BY INCREASING
AVAILABLE MOISTURE AND PROVIDING IINSULA77ON AGAINST EXTREME HEAT AND COLD. AREAS NECESSARY TO ACHIEVE A GOOD STAND OF GRASS SILT FENCE AND DIVERSION DYKES
LIMING REQUIRENiEN1s WHICH HAVE BEEN PERMANENTLY SEEDIED SHOULD BE MULCHED IMMEDIATELY FOLLOWING WHICH ARE COLLECTING SEDIMENT TO HALF" THEIR HEIGHT MUST BE CLEANED AND
SEEDING. AREAS WHICH CANNOT BE ,SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED REPAIRED IMMEDIATELY.
FOR TEMPORARY SITES USING ORGANIC MULCH. MULCH MAY IRE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS, 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
OR CERTAIN GROUND COVERS WHICH D(O NOT PROVIDE ADEQUATE SOIL STABILIZATION BY WITHIN 30 DAYS OF FINAL S17F STABILIZARON, WHEN MEASURES ARE /WO LONGER
Recommended Application THEMSELVES, CAN BE USED IN CONJUNIC77ON WITH 7EMPORARY SEEDING. NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
Palm Test cif Limestone 21. THE E &S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E &S CONTROLS AS
338 TREE PRESERVATION AND PROM2,77ON• NECESSARY IN THE FIELD AS SITE CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT
PR07EC77ON OF DESIRABLE TREES FROIM MECHANICAL OR OTHER INJURY DURING LAND BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION
below 42 3 tons per acre DISTURBING AND CONSTRUCTION ACT7Vl'TY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES �-t D
WHERE THEY WILL BE EFFEC7IVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED SOIL DESCRIPTION
IO1 V �T
4.2 to .5.2 2 tons per acre PROlEC770N, LANDSCAPE BEAURFICA77CJN, DUST AND POLLU77ON CONTROL, NOISE REDUCTION,
SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM MYERSVILLE SILT LOAM, 21% TO 7% SLOPES SOIL IS WELL DRAIINED, WITH
52 to 6 1 ton per acre FOREST TO URBAN -TYPE USES. APPOIES IN TREE-INHABITED AREAS SUBJECT TO LAND MORE THAN 80 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
DISTURBING AC77VI77ES WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
Va. DSWC 3.39 DUST CONTROL_ ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF PONDING OR
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND 588 FLOODING AND A VERY LOW KSAT.
C0NS7RUC77ON ACTI1477ES. TO PREVENIT SURFACE AND AIR MOVEMENT OF DUST FROM MYERSVILLE SILT LOAM, 77. TO 157. SLOPES. SOIL IS WELL DRAINED, WITH
EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY MORE THAN 80 IN. DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
TABLE 331 -B PRESENT HEALTH HAZARDS, 7RAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF PONDING OR
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE 58C
VESCH FLOODING AND A VERY LOW KSAT
-QUICK REFERENCE FOR ALL RF.GIONW
Rate
Planting Bates s en cies L 52
Sept. 1 - Feb. 15 50/50 Mix of
Annual Ryegrass
(Lolium multi -florgW
& 50-100
Cereal (Winter) Rye
. (seglp, roroaiel
Feb. 16 - Apr. 30 Annual Ryegrass 60 -100
(I'alium mul!i- florum)
May 1 - Aug 31 Gorman Millet So
(&taria itaficsitaw)
Soured: Va. DSWC
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TRIANGULAR. BOARD I'ENGE :.
ORANGE SILT LOAM, 27. TO 77* SLOPES SOIL io WELL DRAINED„ WWI 12
TO 36 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM HORNBLENDE GNEISS, THIS SOIL HAS CONVEX DOWN
63B AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF
PONDING OR FLOODING AND A VERY LOW KSAT WITH MODERATE WATER
CAPACITY.
RABUN CLAY LOAM -27. TO 77. SLOPES. SOIL IS WELL DRAINED, WITH
MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
71B - ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING,
MODERA TE WA TER CAPACI TY, AND MODERA TEL Y HIGH TO HIGH KSA T.
RABUN CLAY =7% TO 15% SLOPES, SOIL IS WELL DRAINED, MODERATELY
HIGH TO HIGH KSAT, MORE THAN 80 INCHES TO THE WATER TABLE, NO
`FREQUENCY OF PONDING OR FLOODING, MODERATE WATER CAPACITY, MADE
72C3 -FROM RESIDUUM WEATHERED FROM GREENSTONE.
UDORTHENTS, LOAMY -2% TO 259 SLOPES SOIL FROM RESIDUUM
WEATHERED FROM GRANDE AND GNEISS, WITH MORE THAN 80 INCHES TO
THE WATER TABLE, NO FLOODING OR PONDING, AND CONVEX DOWN AND
88 -ACROSS-SLOPE SHAPE.
STORMWATER RUN-OFF CONSIDERATIONS:
CONSTRUCTION OF THIS PROJECT WILL HAVE AN EFFECT ON PEAK"RUIN -OFF RATES
DUE TO AN INCREASE IN QUAN77TY AND VELOCITY OF THE RUN -OFF. IN PHASES I &
ll OF THE E &S PLAN THE IMPERVIOUS AREA IS NOT INCREASED, BUT THE GRADING
IS CHANGED. IN THE FINAL BUILD OUT OF PROPOSED CONSTRUCTIONI PHASES I & ll
THE IMPERVIOUS AREA WILL BE INCREASED WITH PROPOSED ROADS AND TOWNHOMES
THE SEDIMENT BASIN WILL BE CONVERTED TO A SWM FACILITY TO DETAIN AND
TREAT THE RUNOFF SEE SWM PLAN FOR DETAILS
DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES • PURPOSE.'
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO MASS GRADE THE ROAD NETWORK AND LOT PADS
IT 1S ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, A SEDIMENT BASIN, A FOR CONSTRUCTION OF PHASES I & H OF THE CONSTRUCTION PLAN. THE TOTAL AREA TO BE DISTURBED WITH
SEDIMENT TRAP, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. THIS PHASE OF DEVELOPMENT IS 8.63 ACRES
7EMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE AC77V777ES EXISTING SITE CONDITIONS'
TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM THE SITE HAS AN EXISTING HIGH POINT PARALLEL TO AVON STREET EXTENDED THAT DIVIDES THE SITE
AREAS TO BE GRADED AND STORED N OR D FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON DRAINAGE INTO TWO MAIN AREAS, TOWARDS AVON STREET, AND TOWARDS THE SOUTHEASTERN BOUNDARY OF
S17E AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL THE SITE. THERE ARE TWO EXIS77NG HOUSES ONSITE AND VARIOUS OUTBUILDINGS BETWEEN AVON STREET
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION EXTENDED AND THE NATURAL HIGH POINT, THE VEGETATION IS MOSTLY GRASS, STRAW, AND MUD. FROM THE
AC77077ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED HIGH POINT TO THE SOUTHEASTERN BOUNDARY THE S17E IS MOSTLY WOODED AND SLOPES TOWARDS 77-IE
AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIXTURE WILL EXIS77NG CHANNEL ALONG THE SOUTHEASTERN BOUNDARY.
DEPEND ON THE 77ME OF YEAR APPLIED. 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL ADJACENT AREAS.'
DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS THIS S17E INCLUDES PARCELS OWNED BY AVON PROPERTIES, AND 77-IE DONNA JORDAN PARCEL. THE SITE IS
SHALL BE SEEDED WITH FAST GERMINA77NG VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE BORDERED TO THE EAST BY CALE ELEMENTARY SCHOOL, TO THE WEST AND SOUTH BY RESIDENTIAL
AREAS SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. PROPERTIES, AND TO THE NORTH BY AVON STREET EXTENDED.
CONSTRUCT70N ENTRANCE QFFSI TE LAND DISTURBANCE.'
A STABILIZED PAVED CONSTRUC77ON EN7RANCE WITH A WASH RACK LOCATED AT THE POINT OF NO OFFSI7E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF
VEHICULAR INGRESS AND EGRESS ON A CONSTRUC77ON SITE DISTURBANCE AS SHOWN.
TO REDUCE THE AMOUNT OF MUD S ,CAL AREAS.
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS, HOWEVER CARE WILL BE TAKEN TO
CONSTRUCRON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AVOID ANY DISTURBANCE TO THE DONNA JORDAN PARCEL DURING PHASES I & II OF THE E &S PLAN.
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS SOILS,
CONSTRUCTION ROAD STABILIZATION. SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W177-1 SOILS DATA INCLUDED WITH THIS
THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDNSION ROADS, PARKING AREAS, AND NARRATIVE.
OTHER ON -S1 7F VEHICLE 7RANSPORTA77ON ROUTE'S WITH 21A STONE IMMEDIATELY AFTER GRADING. 5EQUENCE OF CONSTRUCTION:
TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEETING AS REQUIRED.
7HE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZA77ON WILL BE APPLIED APPROVAL FROM THE INSPECTOR ON THE PROJECT.
TO THE PARKING AND STAGING AREA (4" DEPTH) AND AT THE EN7RANCE OF THE PROJECT (8" 3. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION
DEPTH) ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTE'S INTERSECT PAVED PUBLIC ROADS,
SILT FENCE. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) ]RACKING ONTO
THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
A TEMPORARY SEDIMENT BARRIER CONSlS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO IN7ERCEPT AND DETAIN SMALL SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE PARKING AND
PREVENT SEDIMENT FROM LEAVING THE SITE TO DECREASE THE VELOCITY OF SHEET FLOWS AND STAGING AREA WITH CONSTRUCTION ROAD STABILIZATION. CONSTRUCTION ROAD STABILIZAT70N SHALL
LOW- TO- MODERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN CONSIST OF 4" OF 21A GRAVEL IN 77-IE PARKING AREA, AND 8" OF 21A GRAVEL IN ANY POR77ON OF THE
SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS CONSTRUC77ON ENTRANCE WHICH IS UNPAVED. PARKING AND CONSTRUCTION ENTRANCE AREAS SHSALL BE
INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJEC77ONABLE MATERIALS BEFORE CONSTRUCTION ROAD
ACCORDANCE WITH 77-IE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK (VESCH). STABILIZA77ON IS INSTALLED.
PERMANENT STABILIZA770N. 4. INSTALL THE 1N177AL CONSTRUCT70N MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS
THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. INCLUDES SILT FENCE, TEMPORARY DIVERSION DIKE, SEDIMENT TRAP, AND SEDIMENT BASIN. MEASURES
INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE
TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DIS77JRBANCE TAKES PLACE.
STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E C'ON0177ONS, 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCT70N ENTRANCE IS INSTALLED, INSTALL ANY
AND ALLOWS SELEC77ON OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN.
HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETON OF CONSTRUC77ON AC77W77ES, ALL 6. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN
AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN
TEMPORARY SEEDING. OPERATIONS STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS
THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY 7 ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN.
STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W17HIN SEVEN
MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STABILIZA77ON
SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL
OFF-SITE 'AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE
UN77L PERMANENT VEGETA7ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
DUST CON7ROL: 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE H EROSION
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DIS7URBING, DEMOL177ON AND CONTROL PLAN. INSTALL OU77-ET PROTECTION AS SHOWN ON THE PLANS
CONSTRUC77ON ACTIVIRES. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE
THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL 7H HAZARDS, TRAFFIC SAFETY STABILIZED AND THE INSPECTOR GIVES PERMISSION.
PROBLEMS OR HARM ANIMAL OR PLANT LIFE. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT
.DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
ZEMPORARY DIVERSION DIKE 12. ALL TEMPORARY EROSION AN%I SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS
A RIDGE OF COMPACTED SOIL CONS7RUC7ED AT 77-IE TOP OR BASE OF A SLOPING DISTURBED AREA OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED SEDIMENT AND THE DISTURBED
WHICH DIVERTS OFF: SITE RUNOFF AWAY FROM UNPR07EC7ED SLOPES AND TO A STABILIZED OUTLET, SOIL AREAS RESUL77NG FROM THE DISPOSIT70N OF TEMPORARY MEASURES SHALL BE PERMANENTLY
OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT 7RAPPING STRUCTURE. MAXIMUM STABILIZED TO PREVENT FURMER EROSION AND SEDIMENTATION.
EFFECTIVE LIVE IS 18 MONTHS 13. IF THERE IS SIGNIFICANT DELAY BETWEEN THE CONSTRUCTION OF PHASES l &//, AND PHASES 111 &IV OF THE
TEMPORARY SEDIMENT TRAP: PROPOSED DEVELOPED UNITS, TYE SEDIMENT BASIN WILL BE CONVERTED TO A TIDE III RETENTION BASIN
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE AND SERVE AS A TEMPORARY STORMWA7ER •MANAGEMENT FACILITY UN77L THE FINAL STAGES OF
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED CONSTRUCTION ARE COMPLETE THE SWM SHEET DETAILS THE CONVERSION OF THE E &5 BASIN TO A SWM
AREAS FOR ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM FACILITY. THE FINAL SWM, PLAN AND MS -19 CAL CULA77ONS WILL BE PROVIDED WITH THE AVINITY FINAL WPO
EFFEC7VE LIFE IS 18 MONTHS. SUBMI TTAL.
TEMPORARY SEDIMENT BASIN: TEMPORARY SEEDING:
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA7ER RELEASE STRUCTURES WHICH IS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
FORMED BY CONSTRUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS TIME,rSHALL BE SEEDED WITH FAST GERMINARNG TEMPORARY VEGETA7ON
USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREA7ER FOR IMMEDIA TEL Y FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL
ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIA7E TOPOGRAPHY MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
EFFEC7VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE
PROFESSIONAL. CONDI 77ONS FROM TABLES 3.31 B AND 3.31 C NOTE THAT TABLE 3.31 B PRESENTS
OU7LA T PROTECRON: PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE
7HE INSTALLA 77ON OF RIPRAP CHANNEL SECTIONS AND /OR STILLING BASINS BELOW STORM DRAIN CONDITIONS; ,TABLE 3.31 C PRESENTS MORE IN -DEPTH INFORMATION ON THE
OUTLETS TO REDUCE EROSION AND UNDER - CURNG FROM SCOURING AT OUTLETS AND TO REDUCE PLANT MATERIALS
FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
SAFETY FENCE-• GERMINATE AND GROW. SEEDBED PREPARA 77ON IS ESSENTIAL.
A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
MEASURE AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY
PERMANENT STABILIZATION FOR TEMPORARY SEEDING. TABLE 3.31A MA Y BE USED TO DETERMINE THE
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RATES.
PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF 10 -20 -10 (14 LBS /1,000
CONTROL NARRATIVE. SQ. FT.) OR EQUIVALENT NUTRIENTS LIME AND FERTILIZER SHALL BE
AFTER CONSTRUC77ON IS COMPLETED, ALL. DISTURBED AREAS OF THE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE.
SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
TOPSOIL - 2" DEPTH, LIME - 2 TONS /ACRE, HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
FERTILIZER - 600 LBS /ACRE OF 15 -30 -15 OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST
SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX -114 (45 EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
LBS /ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS /ACRE ARGILE OF THE SOIL SURFACE, ESPECIALLY IN CLA YEY SOILS, AND DOES NOT AID
KENTUCKY BLUEGRASS, 37.5 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 PLANT GROWTH AS EFFECTI' ✓ELY AS OTHER METHODS OF SURFACE ROUGHENING.
LBT /ACRE ANNUAL RYEGRASS & 15 LBS /ACRE PLEASURE PERENNIAL. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL,
AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND CULT /PAICKER SEEDER OR HYDROSEEDER, SMALL GRAINS SHALL BE PLANTED NO
MAINTAINED ON A REGULAR BASIS MORE THAN 1� INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS,
MAINTENANCE.' SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE LEGUMES SHOULD BE PLANTED FROM 4 INCH TO T2 DEEP.
CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY
ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS. • SUMMER' MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC.
A. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND J. 35, EXCEPT THA T HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED
MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT ADEQUA TE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS
CONTROL HANDBOOK. AREAS iWHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR RILL ERIOSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE
GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND
CLEANED, OR IT WILL BE REPLACED. FILTER FABRIC
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR ENTRENCHED 6"
UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS COMPAICTED SOIL 3' MINIMUM
REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT - I
DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. = - 1 =11F -III
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A -'- - I =1 I 1 =1 I 1 =1 I l I l I f=
GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND �"---' --��1 _ - = 1 =1 f (=(l 1 =l f f =1 f ( =l f 1 =1 l 1 =l f 1=f I l
2a" �N' _ I 11=1 I I -1 I I �I I II I II I I I II I II I II I II I II I II I II I II I it I 1_=_U I I III I II I II I II I II I II I II , II �I
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DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM P
PRE - CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT D
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
* VIRGINIA EROSION & SEDIMENT CONTROL S
SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT- •TRAPPING FACILITY SUCH 2
2. A
ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONS7RUC7ED AND
TABLE 331 -A THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VEGETA7ON BY INCREASING
AVAILABLE MOISTURE AND PROVIDING IINSULA77ON AGAINST EXTREME HEAT AND COLD. AREAS NECESSARY TO ACHIEVE A GOOD STAND OF GRASS SILT FENCE AND DIVERSION DYKES
LIMING REQUIRENiEN1s WHICH HAVE BEEN PERMANENTLY SEEDIED SHOULD BE MULCHED IMMEDIATELY FOLLOWING WHICH ARE COLLECTING SEDIMENT TO HALF" THEIR HEIGHT MUST BE CLEANED AND
SEEDING. AREAS WHICH CANNOT BE ,SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED REPAIRED IMMEDIATELY.
FOR TEMPORARY SITES USING ORGANIC MULCH. MULCH MAY IRE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS, 20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
OR CERTAIN GROUND COVERS WHICH D(O NOT PROVIDE ADEQUATE SOIL STABILIZATION BY WITHIN 30 DAYS OF FINAL S17F STABILIZARON, WHEN MEASURES ARE /WO LONGER
Recommended Application THEMSELVES, CAN BE USED IN CONJUNIC77ON WITH 7EMPORARY SEEDING. NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
Palm Test cif Limestone 21. THE E &S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E &S CONTROLS AS
338 TREE PRESERVATION AND PROM2,77ON• NECESSARY IN THE FIELD AS SITE CONDITIONS CHANGE. IN ADDITION, NO SEDIMENT
PR07EC77ON OF DESIRABLE TREES FROIM MECHANICAL OR OTHER INJURY DURING LAND BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION
below 42 3 tons per acre DISTURBING AND CONSTRUCTION ACT7Vl'TY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES �-t D
WHERE THEY WILL BE EFFEC7IVE FOR EROSION AND SEDIMENT CONTROL, WATERSHED SOIL DESCRIPTION
IO1 V �T
4.2 to .5.2 2 tons per acre PROlEC770N, LANDSCAPE BEAURFICA77CJN, DUST AND POLLU77ON CONTROL, NOISE REDUCTION,
SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM MYERSVILLE SILT LOAM, 21% TO 7% SLOPES SOIL IS WELL DRAIINED, WITH
52 to 6 1 ton per acre FOREST TO URBAN -TYPE USES. APPOIES IN TREE-INHABITED AREAS SUBJECT TO LAND MORE THAN 80 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
DISTURBING AC77VI77ES WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
Va. DSWC 3.39 DUST CONTROL_ ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF PONDING OR
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND 588 FLOODING AND A VERY LOW KSAT.
C0NS7RUC77ON ACTI1477ES. TO PREVENIT SURFACE AND AIR MOVEMENT OF DUST FROM MYERSVILLE SILT LOAM, 77. TO 157. SLOPES. SOIL IS WELL DRAINED, WITH
EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY MORE THAN 80 IN. DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
TABLE 331 -B PRESENT HEALTH HAZARDS, 7RAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF PONDING OR
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE 58C
VESCH FLOODING AND A VERY LOW KSAT
-QUICK REFERENCE FOR ALL RF.GIONW
Rate
Planting Bates s en cies L 52
Sept. 1 - Feb. 15 50/50 Mix of
Annual Ryegrass
(Lolium multi -florgW
& 50-100
Cereal (Winter) Rye
. (seglp, roroaiel
Feb. 16 - Apr. 30 Annual Ryegrass 60 -100
(I'alium mul!i- florum)
May 1 - Aug 31 Gorman Millet So
(&taria itaficsitaw)
Soured: Va. DSWC
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TRIANGULAR. BOARD I'ENGE :.
ORANGE SILT LOAM, 27. TO 77* SLOPES SOIL io WELL DRAINED„ WWI 12
TO 36 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM HORNBLENDE GNEISS, THIS SOIL HAS CONVEX DOWN
63B AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF
PONDING OR FLOODING AND A VERY LOW KSAT WITH MODERATE WATER
CAPACITY.
RABUN CLAY LOAM -27. TO 77. SLOPES. SOIL IS WELL DRAINED, WITH
MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
71B - ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING,
MODERA TE WA TER CAPACI TY, AND MODERA TEL Y HIGH TO HIGH KSA T.
RABUN CLAY =7% TO 15% SLOPES, SOIL IS WELL DRAINED, MODERATELY
HIGH TO HIGH KSAT, MORE THAN 80 INCHES TO THE WATER TABLE, NO
`FREQUENCY OF PONDING OR FLOODING, MODERATE WATER CAPACITY, MADE
72C3 -FROM RESIDUUM WEATHERED FROM GREENSTONE.
UDORTHENTS, LOAMY -2% TO 259 SLOPES SOIL FROM RESIDUUM
WEATHERED FROM GRANDE AND GNEISS, WITH MORE THAN 80 INCHES TO
THE WATER TABLE, NO FLOODING OR PONDING, AND CONVEX DOWN AND
88 -ACROSS-SLOPE SHAPE.
STORMWATER RUN-OFF CONSIDERATIONS:
CONSTRUCTION OF THIS PROJECT WILL HAVE AN EFFECT ON PEAK"RUIN -OFF RATES
DUE TO AN INCREASE IN QUAN77TY AND VELOCITY OF THE RUN -OFF. IN PHASES I &
ll OF THE E &S PLAN THE IMPERVIOUS AREA IS NOT INCREASED, BUT THE GRADING
IS CHANGED. IN THE FINAL BUILD OUT OF PROPOSED CONSTRUCTIONI PHASES I & ll
THE IMPERVIOUS AREA WILL BE INCREASED WITH PROPOSED ROADS AND TOWNHOMES
THE SEDIMENT BASIN WILL BE CONVERTED TO A SWM FACILITY TO DETAIN AND
TREAT THE RUNOFF SEE SWM PLAN FOR DETAILS
DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES • PURPOSE.'
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO MASS GRADE THE ROAD NETWORK AND LOT PADS
IT 1S ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, A SEDIMENT BASIN, A FOR CONSTRUCTION OF PHASES I & H OF THE CONSTRUCTION PLAN. THE TOTAL AREA TO BE DISTURBED WITH
SEDIMENT TRAP, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. THIS PHASE OF DEVELOPMENT IS 8.63 ACRES
7EMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE AC77V777ES EXISTING SITE CONDITIONS'
TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM THE SITE HAS AN EXISTING HIGH POINT PARALLEL TO AVON STREET EXTENDED THAT DIVIDES THE SITE
AREAS TO BE GRADED AND STORED N OR D FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON DRAINAGE INTO TWO MAIN AREAS, TOWARDS AVON STREET, AND TOWARDS THE SOUTHEASTERN BOUNDARY OF
S17E AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL THE SITE. THERE ARE TWO EXIS77NG HOUSES ONSITE AND VARIOUS OUTBUILDINGS BETWEEN AVON STREET
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION EXTENDED AND THE NATURAL HIGH POINT, THE VEGETATION IS MOSTLY GRASS, STRAW, AND MUD. FROM THE
AC77077ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED HIGH POINT TO THE SOUTHEASTERN BOUNDARY THE S17E IS MOSTLY WOODED AND SLOPES TOWARDS 77-IE
AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIXTURE WILL EXIS77NG CHANNEL ALONG THE SOUTHEASTERN BOUNDARY.
DEPEND ON THE 77ME OF YEAR APPLIED. 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL ADJACENT AREAS.'
DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS THIS S17E INCLUDES PARCELS OWNED BY AVON PROPERTIES, AND 77-IE DONNA JORDAN PARCEL. THE SITE IS
SHALL BE SEEDED WITH FAST GERMINA77NG VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE BORDERED TO THE EAST BY CALE ELEMENTARY SCHOOL, TO THE WEST AND SOUTH BY RESIDENTIAL
AREAS SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. PROPERTIES, AND TO THE NORTH BY AVON STREET EXTENDED.
CONSTRUCT70N ENTRANCE QFFSI TE LAND DISTURBANCE.'
A STABILIZED PAVED CONSTRUC77ON EN7RANCE WITH A WASH RACK LOCATED AT THE POINT OF NO OFFSI7E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF
VEHICULAR INGRESS AND EGRESS ON A CONSTRUC77ON SITE DISTURBANCE AS SHOWN.
TO REDUCE THE AMOUNT OF MUD S ,CAL AREAS.
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS, HOWEVER CARE WILL BE TAKEN TO
CONSTRUCRON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AVOID ANY DISTURBANCE TO THE DONNA JORDAN PARCEL DURING PHASES I & II OF THE E &S PLAN.
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS SOILS,
CONSTRUCTION ROAD STABILIZATION. SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W177-1 SOILS DATA INCLUDED WITH THIS
THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDNSION ROADS, PARKING AREAS, AND NARRATIVE.
OTHER ON -S1 7F VEHICLE 7RANSPORTA77ON ROUTE'S WITH 21A STONE IMMEDIATELY AFTER GRADING. 5EQUENCE OF CONSTRUCTION:
TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEETING AS REQUIRED.
7HE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZA77ON WILL BE APPLIED APPROVAL FROM THE INSPECTOR ON THE PROJECT.
TO THE PARKING AND STAGING AREA (4" DEPTH) AND AT THE EN7RANCE OF THE PROJECT (8" 3. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION
DEPTH) ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTE'S INTERSECT PAVED PUBLIC ROADS,
SILT FENCE. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) ]RACKING ONTO
THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
A TEMPORARY SEDIMENT BARRIER CONSlS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO IN7ERCEPT AND DETAIN SMALL SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE PARKING AND
PREVENT SEDIMENT FROM LEAVING THE SITE TO DECREASE THE VELOCITY OF SHEET FLOWS AND STAGING AREA WITH CONSTRUCTION ROAD STABILIZATION. CONSTRUCTION ROAD STABILIZAT70N SHALL
LOW- TO- MODERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN CONSIST OF 4" OF 21A GRAVEL IN 77-IE PARKING AREA, AND 8" OF 21A GRAVEL IN ANY POR77ON OF THE
SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS CONSTRUC77ON ENTRANCE WHICH IS UNPAVED. PARKING AND CONSTRUCTION ENTRANCE AREAS SHSALL BE
INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJEC77ONABLE MATERIALS BEFORE CONSTRUCTION ROAD
ACCORDANCE WITH 77-IE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK (VESCH). STABILIZA77ON IS INSTALLED.
PERMANENT STABILIZA770N. 4. INSTALL THE 1N177AL CONSTRUCT70N MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS
THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. INCLUDES SILT FENCE, TEMPORARY DIVERSION DIKE, SEDIMENT TRAP, AND SEDIMENT BASIN. MEASURES
INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE
TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DIS77JRBANCE TAKES PLACE.
STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E C'ON0177ONS, 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCT70N ENTRANCE IS INSTALLED, INSTALL ANY
AND ALLOWS SELEC77ON OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN.
HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETON OF CONSTRUC77ON AC77W77ES, ALL 6. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN
AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN
TEMPORARY SEEDING. OPERATIONS STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS
THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY 7 ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN.
STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W17HIN SEVEN
MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STABILIZA77ON
SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL
OFF-SITE 'AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE
UN77L PERMANENT VEGETA7ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
DUST CON7ROL: 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE H EROSION
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DIS7URBING, DEMOL177ON AND CONTROL PLAN. INSTALL OU77-ET PROTECTION AS SHOWN ON THE PLANS
CONSTRUC77ON ACTIVIRES. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE
THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL 7H HAZARDS, TRAFFIC SAFETY STABILIZED AND THE INSPECTOR GIVES PERMISSION.
PROBLEMS OR HARM ANIMAL OR PLANT LIFE. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT
.DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
ZEMPORARY DIVERSION DIKE 12. ALL TEMPORARY EROSION AN%I SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS
A RIDGE OF COMPACTED SOIL CONS7RUC7ED AT 77-IE TOP OR BASE OF A SLOPING DISTURBED AREA OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED SEDIMENT AND THE DISTURBED
WHICH DIVERTS OFF: SITE RUNOFF AWAY FROM UNPR07EC7ED SLOPES AND TO A STABILIZED OUTLET, SOIL AREAS RESUL77NG FROM THE DISPOSIT70N OF TEMPORARY MEASURES SHALL BE PERMANENTLY
OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT 7RAPPING STRUCTURE. MAXIMUM STABILIZED TO PREVENT FURMER EROSION AND SEDIMENTATION.
EFFECTIVE LIVE IS 18 MONTHS 13. IF THERE IS SIGNIFICANT DELAY BETWEEN THE CONSTRUCTION OF PHASES l &//, AND PHASES 111 &IV OF THE
TEMPORARY SEDIMENT TRAP: PROPOSED DEVELOPED UNITS, TYE SEDIMENT BASIN WILL BE CONVERTED TO A TIDE III RETENTION BASIN
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE AND SERVE AS A TEMPORARY STORMWA7ER •MANAGEMENT FACILITY UN77L THE FINAL STAGES OF
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED CONSTRUCTION ARE COMPLETE THE SWM SHEET DETAILS THE CONVERSION OF THE E &5 BASIN TO A SWM
AREAS FOR ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM FACILITY. THE FINAL SWM, PLAN AND MS -19 CAL CULA77ONS WILL BE PROVIDED WITH THE AVINITY FINAL WPO
EFFEC7VE LIFE IS 18 MONTHS. SUBMI TTAL.
TEMPORARY SEDIMENT BASIN: TEMPORARY SEEDING:
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA7ER RELEASE STRUCTURES WHICH IS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
FORMED BY CONSTRUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS TIME,rSHALL BE SEEDED WITH FAST GERMINARNG TEMPORARY VEGETA7ON
USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREA7ER FOR IMMEDIA TEL Y FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL
ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIA7E TOPOGRAPHY MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
EFFEC7VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE
PROFESSIONAL. CONDI 77ONS FROM TABLES 3.31 B AND 3.31 C NOTE THAT TABLE 3.31 B PRESENTS
OU7LA T PROTECRON: PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE
7HE INSTALLA 77ON OF RIPRAP CHANNEL SECTIONS AND /OR STILLING BASINS BELOW STORM DRAIN CONDITIONS; ,TABLE 3.31 C PRESENTS MORE IN -DEPTH INFORMATION ON THE
OUTLETS TO REDUCE EROSION AND UNDER - CURNG FROM SCOURING AT OUTLETS AND TO REDUCE PLANT MATERIALS
FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
SAFETY FENCE-• GERMINATE AND GROW. SEEDBED PREPARA 77ON IS ESSENTIAL.
A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
MEASURE AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY
PERMANENT STABILIZATION FOR TEMPORARY SEEDING. TABLE 3.31A MA Y BE USED TO DETERMINE THE
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RATES.
PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF 10 -20 -10 (14 LBS /1,000
CONTROL NARRATIVE. SQ. FT.) OR EQUIVALENT NUTRIENTS LIME AND FERTILIZER SHALL BE
AFTER CONSTRUC77ON IS COMPLETED, ALL. DISTURBED AREAS OF THE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE.
SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
TOPSOIL - 2" DEPTH, LIME - 2 TONS /ACRE, HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
FERTILIZER - 600 LBS /ACRE OF 15 -30 -15 OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST
SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX -114 (45 EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
LBS /ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS /ACRE ARGILE OF THE SOIL SURFACE, ESPECIALLY IN CLA YEY SOILS, AND DOES NOT AID
KENTUCKY BLUEGRASS, 37.5 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 PLANT GROWTH AS EFFECTI' ✓ELY AS OTHER METHODS OF SURFACE ROUGHENING.
LBT /ACRE ANNUAL RYEGRASS & 15 LBS /ACRE PLEASURE PERENNIAL. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL,
AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND CULT /PAICKER SEEDER OR HYDROSEEDER, SMALL GRAINS SHALL BE PLANTED NO
MAINTAINED ON A REGULAR BASIS MORE THAN 1� INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS,
MAINTENANCE.' SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE LEGUMES SHOULD BE PLANTED FROM 4 INCH TO T2 DEEP.
CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY
ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS. • SUMMER' MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC.
A. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND J. 35, EXCEPT THA T HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED
MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT ADEQUA TE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS
CONTROL HANDBOOK. AREAS iWHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR RILL ERIOSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE
GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND
CLEANED, OR IT WILL BE REPLACED. FILTER FABRIC
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR ENTRENCHED 6"
UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS COMPAICTED SOIL 3' MINIMUM
REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT - I
DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. = - 1 =11F -III
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A -'- - I =1 I 1 =1 I 1 =1 I l I l I f=
GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND �"---' --��1 _ - = 1 =1 f (=(l 1 =l f f =1 f ( =l f 1 =1 l 1 =l f 1=f I l
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RESEEDED AS NEEDED. 11-11 , , ,_, , , _ _, , -, , , -, , , -, , , , , -, , -, ,W, , LMEI 1 ,�, , , -, ,1I
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TEMPORARY DIVERSION DIKE
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OSCOTT R. COLLINS�
,U No. 35791 ,2l
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TRIANGULAR. BOARD I'ENGE :.
ORANGE SILT LOAM, 27. TO 77* SLOPES SOIL io WELL DRAINED„ WWI 12
TO 36 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM HORNBLENDE GNEISS, THIS SOIL HAS CONVEX DOWN
63B AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF
PONDING OR FLOODING AND A VERY LOW KSAT WITH MODERATE WATER
CAPACITY.
RABUN CLAY LOAM -27. TO 77. SLOPES. SOIL IS WELL DRAINED, WITH
MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
71B - ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING,
MODERA TE WA TER CAPACI TY, AND MODERA TEL Y HIGH TO HIGH KSA T.
RABUN CLAY =7% TO 15% SLOPES, SOIL IS WELL DRAINED, MODERATELY
HIGH TO HIGH KSAT, MORE THAN 80 INCHES TO THE WATER TABLE, NO
`FREQUENCY OF PONDING OR FLOODING, MODERATE WATER CAPACITY, MADE
72C3 -FROM RESIDUUM WEATHERED FROM GREENSTONE.
UDORTHENTS, LOAMY -2% TO 259 SLOPES SOIL FROM RESIDUUM
WEATHERED FROM GRANDE AND GNEISS, WITH MORE THAN 80 INCHES TO
THE WATER TABLE, NO FLOODING OR PONDING, AND CONVEX DOWN AND
88 -ACROSS-SLOPE SHAPE.
STORMWATER RUN-OFF CONSIDERATIONS:
CONSTRUCTION OF THIS PROJECT WILL HAVE AN EFFECT ON PEAK"RUIN -OFF RATES
DUE TO AN INCREASE IN QUAN77TY AND VELOCITY OF THE RUN -OFF. IN PHASES I &
ll OF THE E &S PLAN THE IMPERVIOUS AREA IS NOT INCREASED, BUT THE GRADING
IS CHANGED. IN THE FINAL BUILD OUT OF PROPOSED CONSTRUCTIONI PHASES I & ll
THE IMPERVIOUS AREA WILL BE INCREASED WITH PROPOSED ROADS AND TOWNHOMES
THE SEDIMENT BASIN WILL BE CONVERTED TO A SWM FACILITY TO DETAIN AND
TREAT THE RUNOFF SEE SWM PLAN FOR DETAILS
DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES • PURPOSE.'
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO MASS GRADE THE ROAD NETWORK AND LOT PADS
IT 1S ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, A SEDIMENT BASIN, A FOR CONSTRUCTION OF PHASES I & H OF THE CONSTRUCTION PLAN. THE TOTAL AREA TO BE DISTURBED WITH
SEDIMENT TRAP, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. THIS PHASE OF DEVELOPMENT IS 8.63 ACRES
7EMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE AC77V777ES EXISTING SITE CONDITIONS'
TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM THE SITE HAS AN EXISTING HIGH POINT PARALLEL TO AVON STREET EXTENDED THAT DIVIDES THE SITE
AREAS TO BE GRADED AND STORED N OR D FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON DRAINAGE INTO TWO MAIN AREAS, TOWARDS AVON STREET, AND TOWARDS THE SOUTHEASTERN BOUNDARY OF
S17E AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL THE SITE. THERE ARE TWO EXIS77NG HOUSES ONSITE AND VARIOUS OUTBUILDINGS BETWEEN AVON STREET
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION EXTENDED AND THE NATURAL HIGH POINT, THE VEGETATION IS MOSTLY GRASS, STRAW, AND MUD. FROM THE
AC77077ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED HIGH POINT TO THE SOUTHEASTERN BOUNDARY THE S17E IS MOSTLY WOODED AND SLOPES TOWARDS 77-IE
AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIXTURE WILL EXIS77NG CHANNEL ALONG THE SOUTHEASTERN BOUNDARY.
DEPEND ON THE 77ME OF YEAR APPLIED. 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL ADJACENT AREAS.'
DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS THIS S17E INCLUDES PARCELS OWNED BY AVON PROPERTIES, AND 77-IE DONNA JORDAN PARCEL. THE SITE IS
SHALL BE SEEDED WITH FAST GERMINA77NG VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE BORDERED TO THE EAST BY CALE ELEMENTARY SCHOOL, TO THE WEST AND SOUTH BY RESIDENTIAL
AREAS SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. PROPERTIES, AND TO THE NORTH BY AVON STREET EXTENDED.
CONSTRUCT70N ENTRANCE QFFSI TE LAND DISTURBANCE.'
A STABILIZED PAVED CONSTRUC77ON EN7RANCE WITH A WASH RACK LOCATED AT THE POINT OF NO OFFSI7E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF
VEHICULAR INGRESS AND EGRESS ON A CONSTRUC77ON SITE DISTURBANCE AS SHOWN.
TO REDUCE THE AMOUNT OF MUD S ,CAL AREAS.
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS, HOWEVER CARE WILL BE TAKEN TO
CONSTRUCRON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AVOID ANY DISTURBANCE TO THE DONNA JORDAN PARCEL DURING PHASES I & II OF THE E &S PLAN.
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS SOILS,
CONSTRUCTION ROAD STABILIZATION. SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W177-1 SOILS DATA INCLUDED WITH THIS
THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDNSION ROADS, PARKING AREAS, AND NARRATIVE.
OTHER ON -S1 7F VEHICLE 7RANSPORTA77ON ROUTE'S WITH 21A STONE IMMEDIATELY AFTER GRADING. 5EQUENCE OF CONSTRUCTION:
TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEETING AS REQUIRED.
7HE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZA77ON WILL BE APPLIED APPROVAL FROM THE INSPECTOR ON THE PROJECT.
TO THE PARKING AND STAGING AREA (4" DEPTH) AND AT THE EN7RANCE OF THE PROJECT (8" 3. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION
DEPTH) ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTE'S INTERSECT PAVED PUBLIC ROADS,
SILT FENCE. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) ]RACKING ONTO
THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
A TEMPORARY SEDIMENT BARRIER CONSlS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO IN7ERCEPT AND DETAIN SMALL SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE PARKING AND
PREVENT SEDIMENT FROM LEAVING THE SITE TO DECREASE THE VELOCITY OF SHEET FLOWS AND STAGING AREA WITH CONSTRUCTION ROAD STABILIZATION. CONSTRUCTION ROAD STABILIZAT70N SHALL
LOW- TO- MODERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN CONSIST OF 4" OF 21A GRAVEL IN 77-IE PARKING AREA, AND 8" OF 21A GRAVEL IN ANY POR77ON OF THE
SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS CONSTRUC77ON ENTRANCE WHICH IS UNPAVED. PARKING AND CONSTRUCTION ENTRANCE AREAS SHSALL BE
INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJEC77ONABLE MATERIALS BEFORE CONSTRUCTION ROAD
ACCORDANCE WITH 77-IE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK (VESCH). STABILIZA77ON IS INSTALLED.
PERMANENT STABILIZA770N. 4. INSTALL THE 1N177AL CONSTRUCT70N MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS
THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. INCLUDES SILT FENCE, TEMPORARY DIVERSION DIKE, SEDIMENT TRAP, AND SEDIMENT BASIN. MEASURES
INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE
TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DIS77JRBANCE TAKES PLACE.
STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E C'ON0177ONS, 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCT70N ENTRANCE IS INSTALLED, INSTALL ANY
AND ALLOWS SELEC77ON OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN.
HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETON OF CONSTRUC77ON AC77W77ES, ALL 6. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN
AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN
TEMPORARY SEEDING. OPERATIONS STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS
THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY 7 ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN.
STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W17HIN SEVEN
MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STABILIZA77ON
SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL
OFF-SITE 'AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE
UN77L PERMANENT VEGETA7ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
DUST CON7ROL: 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE H EROSION
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DIS7URBING, DEMOL177ON AND CONTROL PLAN. INSTALL OU77-ET PROTECTION AS SHOWN ON THE PLANS
CONSTRUC77ON ACTIVIRES. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE
THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL 7H HAZARDS, TRAFFIC SAFETY STABILIZED AND THE INSPECTOR GIVES PERMISSION.
PROBLEMS OR HARM ANIMAL OR PLANT LIFE. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT
.DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
ZEMPORARY DIVERSION DIKE 12. ALL TEMPORARY EROSION AN%I SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS
A RIDGE OF COMPACTED SOIL CONS7RUC7ED AT 77-IE TOP OR BASE OF A SLOPING DISTURBED AREA OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED SEDIMENT AND THE DISTURBED
WHICH DIVERTS OFF: SITE RUNOFF AWAY FROM UNPR07EC7ED SLOPES AND TO A STABILIZED OUTLET, SOIL AREAS RESUL77NG FROM THE DISPOSIT70N OF TEMPORARY MEASURES SHALL BE PERMANENTLY
OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT 7RAPPING STRUCTURE. MAXIMUM STABILIZED TO PREVENT FURMER EROSION AND SEDIMENTATION.
EFFECTIVE LIVE IS 18 MONTHS 13. IF THERE IS SIGNIFICANT DELAY BETWEEN THE CONSTRUCTION OF PHASES l &//, AND PHASES 111 &IV OF THE
TEMPORARY SEDIMENT TRAP: PROPOSED DEVELOPED UNITS, TYE SEDIMENT BASIN WILL BE CONVERTED TO A TIDE III RETENTION BASIN
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE AND SERVE AS A TEMPORARY STORMWA7ER •MANAGEMENT FACILITY UN77L THE FINAL STAGES OF
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED CONSTRUCTION ARE COMPLETE THE SWM SHEET DETAILS THE CONVERSION OF THE E &5 BASIN TO A SWM
AREAS FOR ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM FACILITY. THE FINAL SWM, PLAN AND MS -19 CAL CULA77ONS WILL BE PROVIDED WITH THE AVINITY FINAL WPO
EFFEC7VE LIFE IS 18 MONTHS. SUBMI TTAL.
TEMPORARY SEDIMENT BASIN: TEMPORARY SEEDING:
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA7ER RELEASE STRUCTURES WHICH IS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
FORMED BY CONSTRUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS TIME,rSHALL BE SEEDED WITH FAST GERMINARNG TEMPORARY VEGETA7ON
USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREA7ER FOR IMMEDIA TEL Y FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL
ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIA7E TOPOGRAPHY MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
EFFEC7VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE
PROFESSIONAL. CONDI 77ONS FROM TABLES 3.31 B AND 3.31 C NOTE THAT TABLE 3.31 B PRESENTS
OU7LA T PROTECRON: PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE
7HE INSTALLA 77ON OF RIPRAP CHANNEL SECTIONS AND /OR STILLING BASINS BELOW STORM DRAIN CONDITIONS; ,TABLE 3.31 C PRESENTS MORE IN -DEPTH INFORMATION ON THE
OUTLETS TO REDUCE EROSION AND UNDER - CURNG FROM SCOURING AT OUTLETS AND TO REDUCE PLANT MATERIALS
FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
SAFETY FENCE-• GERMINATE AND GROW. SEEDBED PREPARA 77ON IS ESSENTIAL.
A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
MEASURE AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY
PERMANENT STABILIZATION FOR TEMPORARY SEEDING. TABLE 3.31A MA Y BE USED TO DETERMINE THE
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RATES.
PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF 10 -20 -10 (14 LBS /1,000
CONTROL NARRATIVE. SQ. FT.) OR EQUIVALENT NUTRIENTS LIME AND FERTILIZER SHALL BE
AFTER CONSTRUC77ON IS COMPLETED, ALL. DISTURBED AREAS OF THE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE.
SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
TOPSOIL - 2" DEPTH, LIME - 2 TONS /ACRE, HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
FERTILIZER - 600 LBS /ACRE OF 15 -30 -15 OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST
SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX -114 (45 EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
LBS /ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS /ACRE ARGILE OF THE SOIL SURFACE, ESPECIALLY IN CLA YEY SOILS, AND DOES NOT AID
KENTUCKY BLUEGRASS, 37.5 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 PLANT GROWTH AS EFFECTI' ✓ELY AS OTHER METHODS OF SURFACE ROUGHENING.
LBT /ACRE ANNUAL RYEGRASS & 15 LBS /ACRE PLEASURE PERENNIAL. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL,
AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND CULT /PAICKER SEEDER OR HYDROSEEDER, SMALL GRAINS SHALL BE PLANTED NO
MAINTAINED ON A REGULAR BASIS MORE THAN 1� INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS,
MAINTENANCE.' SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE LEGUMES SHOULD BE PLANTED FROM 4 INCH TO T2 DEEP.
CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY
ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS. • SUMMER' MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC.
A. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND J. 35, EXCEPT THA T HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED
MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT ADEQUA TE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS
CONTROL HANDBOOK. AREAS iWHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR RILL ERIOSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE
GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND
CLEANED, OR IT WILL BE REPLACED. FILTER FABRIC
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR ENTRENCHED 6"
UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS COMPAICTED SOIL 3' MINIMUM
REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT - I
DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. = - 1 =11F -III
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A -'- - I =1 I 1 =1 I 1 =1 I l I l I f=
GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND �"---' --��1 _ - = 1 =1 f (=(l 1 =l f f =1 f ( =l f 1 =1 l 1 =l f 1=f I l
2a" �N' _ I 11=1 I I -1 I I �I I II I II I I I II I II I II I II I II I II I II I II I it I 1_=_U I I III I II I II I II I II I II I II , II �I
RESEEDED AS NEEDED. 11-11 , , ,_, , , _ _, , -, , , -, , , -, , , , , -, , -, ,W, , LMEI 1 ,�, , , -, ,1I
DD
TEMPORARY DIVERSION DIKE
NO SCALE
o '�
OSCOTT R. COLLINS�
,U No. 35791 ,2l
� oA /
�SSIONAL ECG
H
z
z w
x
O
( � O
n i- V X
w = �
D
O
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Q �
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M v4 � a
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0 � N
ORANGE SILT LOAM, 27. TO 77* SLOPES SOIL io WELL DRAINED„ WWI 12
TO 36 IN DEPTH TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM HORNBLENDE GNEISS, THIS SOIL HAS CONVEX DOWN
63B AND ACROSS -SLOPE SHAPE. THIS SOIL HAS NO FREQUENCY OF
PONDING OR FLOODING AND A VERY LOW KSAT WITH MODERATE WATER
CAPACITY.
RABUN CLAY LOAM -27. TO 77. SLOPES. SOIL IS WELL DRAINED, WITH
MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM GREENSTONE, THIS SOIL HAS CONVEX DOWN AND
71B - ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING,
MODERA TE WA TER CAPACI TY, AND MODERA TEL Y HIGH TO HIGH KSA T.
RABUN CLAY =7% TO 15% SLOPES, SOIL IS WELL DRAINED, MODERATELY
HIGH TO HIGH KSAT, MORE THAN 80 INCHES TO THE WATER TABLE, NO
`FREQUENCY OF PONDING OR FLOODING, MODERATE WATER CAPACITY, MADE
72C3 -FROM RESIDUUM WEATHERED FROM GREENSTONE.
UDORTHENTS, LOAMY -2% TO 259 SLOPES SOIL FROM RESIDUUM
WEATHERED FROM GRANDE AND GNEISS, WITH MORE THAN 80 INCHES TO
THE WATER TABLE, NO FLOODING OR PONDING, AND CONVEX DOWN AND
88 -ACROSS-SLOPE SHAPE.
STORMWATER RUN-OFF CONSIDERATIONS:
CONSTRUCTION OF THIS PROJECT WILL HAVE AN EFFECT ON PEAK"RUIN -OFF RATES
DUE TO AN INCREASE IN QUAN77TY AND VELOCITY OF THE RUN -OFF. IN PHASES I &
ll OF THE E &S PLAN THE IMPERVIOUS AREA IS NOT INCREASED, BUT THE GRADING
IS CHANGED. IN THE FINAL BUILD OUT OF PROPOSED CONSTRUCTIONI PHASES I & ll
THE IMPERVIOUS AREA WILL BE INCREASED WITH PROPOSED ROADS AND TOWNHOMES
THE SEDIMENT BASIN WILL BE CONVERTED TO A SWM FACILITY TO DETAIN AND
TREAT THE RUNOFF SEE SWM PLAN FOR DETAILS
DESCRIPTION OF EROSION & SEDIMENT EROSION CONTROL NOTES & NARRATIVE
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES • PURPOSE.'
THE PURPOSE OF THIS LAND DISTURBING ACTIVITY IS TO MASS GRADE THE ROAD NETWORK AND LOT PADS
IT 1S ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, A SEDIMENT BASIN, A FOR CONSTRUCTION OF PHASES I & H OF THE CONSTRUCTION PLAN. THE TOTAL AREA TO BE DISTURBED WITH
SEDIMENT TRAP, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. THIS PHASE OF DEVELOPMENT IS 8.63 ACRES
7EMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE AC77V777ES EXISTING SITE CONDITIONS'
TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM THE SITE HAS AN EXISTING HIGH POINT PARALLEL TO AVON STREET EXTENDED THAT DIVIDES THE SITE
AREAS TO BE GRADED AND STORED N OR D FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON DRAINAGE INTO TWO MAIN AREAS, TOWARDS AVON STREET, AND TOWARDS THE SOUTHEASTERN BOUNDARY OF
S17E AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL THE SITE. THERE ARE TWO EXIS77NG HOUSES ONSITE AND VARIOUS OUTBUILDINGS BETWEEN AVON STREET
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION EXTENDED AND THE NATURAL HIGH POINT, THE VEGETATION IS MOSTLY GRASS, STRAW, AND MUD. FROM THE
AC77077ES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED HIGH POINT TO THE SOUTHEASTERN BOUNDARY THE S17E IS MOSTLY WOODED AND SLOPES TOWARDS 77-IE
AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF SEED MIXTURE WILL EXIS77NG CHANNEL ALONG THE SOUTHEASTERN BOUNDARY.
DEPEND ON THE 77ME OF YEAR APPLIED. 7EMPORARY SEEDING WILL BE PERFORMED FOR ALL ADJACENT AREAS.'
DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS. THESE AREAS THIS S17E INCLUDES PARCELS OWNED BY AVON PROPERTIES, AND 77-IE DONNA JORDAN PARCEL. THE SITE IS
SHALL BE SEEDED WITH FAST GERMINA77NG VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE BORDERED TO THE EAST BY CALE ELEMENTARY SCHOOL, TO THE WEST AND SOUTH BY RESIDENTIAL
AREAS SELEC77ON OF SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. PROPERTIES, AND TO THE NORTH BY AVON STREET EXTENDED.
CONSTRUCT70N ENTRANCE QFFSI TE LAND DISTURBANCE.'
A STABILIZED PAVED CONSTRUC77ON EN7RANCE WITH A WASH RACK LOCATED AT THE POINT OF NO OFFSI7E LAND DISTURBANCE IS PROPOSED. ALL LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF
VEHICULAR INGRESS AND EGRESS ON A CONSTRUC77ON SITE DISTURBANCE AS SHOWN.
TO REDUCE THE AMOUNT OF MUD S ,CAL AREAS.
TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. THERE ARE NO CRITICAL AREAS LOCATED WITHIN THE PROJECT LIMITS, HOWEVER CARE WILL BE TAKEN TO
CONSTRUCRON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AVOID ANY DISTURBANCE TO THE DONNA JORDAN PARCEL DURING PHASES I & II OF THE E &S PLAN.
AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS SOILS,
CONSTRUCTION ROAD STABILIZATION. SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W177-1 SOILS DATA INCLUDED WITH THIS
THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDNSION ROADS, PARKING AREAS, AND NARRATIVE.
OTHER ON -S1 7F VEHICLE 7RANSPORTA77ON ROUTE'S WITH 21A STONE IMMEDIATELY AFTER GRADING. 5EQUENCE OF CONSTRUCTION:
TO REDUCE THE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEETING AS REQUIRED.
7HE EROSION AND SUBSEQUENT REGARDING OF PERMANENT ROADBEDS BETWEEN THE 77ME OF 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
INITIAL GRADING AND FINAL STABILIZATION. CONSTRUCTION ROAD STABILIZA77ON WILL BE APPLIED APPROVAL FROM THE INSPECTOR ON THE PROJECT.
TO THE PARKING AND STAGING AREA (4" DEPTH) AND AT THE EN7RANCE OF THE PROJECT (8" 3. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION
DEPTH) ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTE'S INTERSECT PAVED PUBLIC ROADS,
SILT FENCE. PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) ]RACKING ONTO
THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
A TEMPORARY SEDIMENT BARRIER CONSlS77NG OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO IN7ERCEPT AND DETAIN SMALL SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE PARKING AND
PREVENT SEDIMENT FROM LEAVING THE SITE TO DECREASE THE VELOCITY OF SHEET FLOWS AND STAGING AREA WITH CONSTRUCTION ROAD STABILIZATION. CONSTRUCTION ROAD STABILIZAT70N SHALL
LOW- TO- MODERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN CONSIST OF 4" OF 21A GRAVEL IN 77-IE PARKING AREA, AND 8" OF 21A GRAVEL IN ANY POR77ON OF THE
SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS CONSTRUC77ON ENTRANCE WHICH IS UNPAVED. PARKING AND CONSTRUCTION ENTRANCE AREAS SHSALL BE
INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN CLEARED OF ALL VEGETATION, ROOTS, OR OTHER OBJEC77ONABLE MATERIALS BEFORE CONSTRUCTION ROAD
ACCORDANCE WITH 77-IE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK (VESCH). STABILIZA77ON IS INSTALLED.
PERMANENT STABILIZA770N. 4. INSTALL THE 1N177AL CONSTRUCT70N MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS
THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. INCLUDES SILT FENCE, TEMPORARY DIVERSION DIKE, SEDIMENT TRAP, AND SEDIMENT BASIN. MEASURES
INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE
TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DIS77JRBANCE TAKES PLACE.
STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E C'ON0177ONS, 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCT70N ENTRANCE IS INSTALLED, INSTALL ANY
AND ALLOWS SELEC77ON OF THE MOST APPROPRIATE PLANT MATERIALS TO IMPROVE WILDLIFE REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE EROSION CONTROL PLAN.
HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETON OF CONSTRUC77ON AC77W77ES, ALL 6. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE EROSION CONTROL PLAN
AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN
TEMPORARY SEEDING. OPERATIONS STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS
THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH DAMS, DIKES, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY 7 ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN.
STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS W17HIN SEVEN
MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR DAYS AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF THE SITE. TEMPORARY SOIL STABILIZA77ON
SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL
OFF-SITE 'AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE
UN77L PERMANENT VEGETA7ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
DUST CON7ROL: 9. GRADE OUT THE REMAINDER OF THE SITE AND GRADE THE ROADS AS SHOWN ON THE PHASE H EROSION
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DIS7URBING, DEMOL177ON AND CONTROL PLAN. INSTALL OU77-ET PROTECTION AS SHOWN ON THE PLANS
CONSTRUC77ON ACTIVIRES. 10. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVE
TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE EROSION CONTROL MEASURES. NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE
THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL 7H HAZARDS, TRAFFIC SAFETY STABILIZED AND THE INSPECTOR GIVES PERMISSION.
PROBLEMS OR HARM ANIMAL OR PLANT LIFE. 11. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT
.DUST CON7ROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN
DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
ZEMPORARY DIVERSION DIKE 12. ALL TEMPORARY EROSION AN%I SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS
A RIDGE OF COMPACTED SOIL CONS7RUC7ED AT 77-IE TOP OR BASE OF A SLOPING DISTURBED AREA OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINIS7RATOR. TRAPPED SEDIMENT AND THE DISTURBED
WHICH DIVERTS OFF: SITE RUNOFF AWAY FROM UNPR07EC7ED SLOPES AND TO A STABILIZED OUTLET, SOIL AREAS RESUL77NG FROM THE DISPOSIT70N OF TEMPORARY MEASURES SHALL BE PERMANENTLY
OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT 7RAPPING STRUCTURE. MAXIMUM STABILIZED TO PREVENT FURMER EROSION AND SEDIMENTATION.
EFFECTIVE LIVE IS 18 MONTHS 13. IF THERE IS SIGNIFICANT DELAY BETWEEN THE CONSTRUCTION OF PHASES l &//, AND PHASES 111 &IV OF THE
TEMPORARY SEDIMENT TRAP: PROPOSED DEVELOPED UNITS, TYE SEDIMENT BASIN WILL BE CONVERTED TO A TIDE III RETENTION BASIN
A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE AND SERVE AS A TEMPORARY STORMWA7ER •MANAGEMENT FACILITY UN77L THE FINAL STAGES OF
OUTLET ACROSS A DRAINAGE SWALE, TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED CONSTRUCTION ARE COMPLETE THE SWM SHEET DETAILS THE CONVERSION OF THE E &5 BASIN TO A SWM
AREAS FOR ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT MAXIMUM FACILITY. THE FINAL SWM, PLAN AND MS -19 CAL CULA77ONS WILL BE PROVIDED WITH THE AVINITY FINAL WPO
EFFEC7VE LIFE IS 18 MONTHS. SUBMI TTAL.
TEMPORARY SEDIMENT BASIN: TEMPORARY SEEDING:
A TEMPORARY BARRIER OR DAM WITH CONTROLLED STORMWA7ER RELEASE STRUCTURES WHICH IS ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF
FORMED BY CONSTRUC77NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS TIME,rSHALL BE SEEDED WITH FAST GERMINARNG TEMPORARY VEGETA7ON
USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREA7ER FOR IMMEDIA TEL Y FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL
ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT IT CAN BE DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES THAT
CONSTRUCTED ONLY WHERE THERE IS SUFFICIENT SPACE AND APPROPRIA7E TOPOGRAPHY MAXIMUM WILL NOT BE BROUGHT TO FINAL GRADE WITHIN 30 DAYS.
EFFEC7VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE
PROFESSIONAL. CONDI 77ONS FROM TABLES 3.31 B AND 3.31 C NOTE THAT TABLE 3.31 B PRESENTS
OU7LA T PROTECRON: PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE
7HE INSTALLA 77ON OF RIPRAP CHANNEL SECTIONS AND /OR STILLING BASINS BELOW STORM DRAIN CONDITIONS; ,TABLE 3.31 C PRESENTS MORE IN -DEPTH INFORMATION ON THE
OUTLETS TO REDUCE EROSION AND UNDER - CURNG FROM SCOURING AT OUTLETS AND TO REDUCE PLANT MATERIALS
FLOW VELOCITIES BEFORE STORMWATER ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO
SAFETY FENCE-• GERMINATE AND GROW. SEEDBED PREPARA 77ON IS ESSENTIAL.
A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL
MEASURE AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY
PERMANENT STABILIZATION FOR TEMPORARY SEEDING. TABLE 3.31A MA Y BE USED TO DETERMINE THE
PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RATES.
PER THE PERMANENT STABILIZATION OF THIS EROSION & SEDIMENT FERTILIZER SHALL BE APPLIED AS 600 LBS /ACRE OF 10 -20 -10 (14 LBS /1,000
CONTROL NARRATIVE. SQ. FT.) OR EQUIVALENT NUTRIENTS LIME AND FERTILIZER SHALL BE
AFTER CONSTRUC77ON IS COMPLETED, ALL. DISTURBED AREAS OF THE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE.
SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER
STANDARDS THIS SHALL CONSIST OF THE FOLLOWING; ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR
TOPSOIL - 2" DEPTH, LIME - 2 TONS /ACRE, HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR
FERTILIZER - 600 LBS /ACRE OF 15 -30 -15 OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST
SEED - ERNST 5311 CONSERVATION SEED MIX - ERNMX -114 (45 EFFECTIVE ON SANDY SOILS THIS PRACTICE OFTEN CAUSES UNDUE COMPACTION
LBS /ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS /ACRE ARGILE OF THE SOIL SURFACE, ESPECIALLY IN CLA YEY SOILS, AND DOES NOT AID
KENTUCKY BLUEGRASS, 37.5 LBS /ACRE PARK KENTUCKY BLUEGRASS, 15 PLANT GROWTH AS EFFECTI' ✓ELY AS OTHER METHODS OF SURFACE ROUGHENING.
LBT /ACRE ANNUAL RYEGRASS & 15 LBS /ACRE PLEASURE PERENNIAL. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL,
AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND CULT /PAICKER SEEDER OR HYDROSEEDER, SMALL GRAINS SHALL BE PLANTED NO
MAINTAINED ON A REGULAR BASIS MORE THAN 1� INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS,
MAINTENANCE.' SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE LEGUMES SHOULD BE PLANTED FROM 4 INCH TO T2 DEEP.
CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY
ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS. • SUMMER' MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC.
A. SEDIMENT BASINS AND /OR TRAPS WILL BE CLEANED AND J. 35, EXCEPT THA T HYDROMULCHES (FIBER MULCH) WILL NOT BE CONSIDERED
MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT ADEQUA TE. STRAW MULCH SHOULD BE USED DURING THESE PERIODS
CONTROL HANDBOOK. AREAS iWHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT
B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR RILL ERIOSION WILL BE RE- SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED.
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE
GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND
CLEANED, OR IT WILL BE REPLACED. FILTER FABRIC
C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR ENTRENCHED 6"
UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS COMPAICTED SOIL 3' MINIMUM
REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT - I
DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. = - 1 =11F -III
D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A -'- - I =1 I 1 =1 I 1 =1 I l I l I f=
GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND �"---' --��1 _ - = 1 =1 f (=(l 1 =l f f =1 f ( =l f 1 =1 l 1 =l f 1=f I l
2a" �N' _ I 11=1 I I -1 I I �I I II I II I I I II I II I II I II I II I II I II I II I it I 1_=_U I I III I II I II I II I II I II I II , II �I
RESEEDED AS NEEDED. 11-11 , , ,_, , , _ _, , -, , , -, , , -, , , , , -, , -, ,W, , LMEI 1 ,�, , , -, ,1I
DD
TEMPORARY DIVERSION DIKE
NO SCALE
o '�
OSCOTT R. COLLINS�
,U No. 35791 ,2l
� oA /
�SSIONAL ECG
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TEMPORARY DIVERSION DIKE
NO SCALE
o '�
OSCOTT R. COLLINS�
,U No. 35791 ,2l
� oA /
�SSIONAL ECG
H
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63
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UN�HASES' STUROED DUI RING
I & 11
I also%%
0 100,
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00
El \13
NOTE: CONTRACTOR SHALL ENCOMPASS SITE WITH
ORANGE SAFETY FENCE WITH NO TRESPASSING SIGNS FOR
SAFETY PURPOSES.
\ a
\ - \ SEDIMENT TRAP I
10 ' I \-- go
PHASE I
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C NSTRU TI9,N ENTRANCE SHALL BE INSTAL E PEIRATE
TAI E%BY HE CONTRACTOR. tALLCONSTRUC 0 TRAFFIC.
411Z ;ITH C STRUCTION ENT�ANCE. NO 9TH TRANCE
3TI ZEP.
10+00 10+50 11+00 11+50 12+00
SEDIMENT BASIN OUTFALL
'IN RISER
C
j
a Rift.
#ANN I
LE:L7E:1VU
LIMITS OF LAND DISTURBANCE
DIVERSION DIKE
BOUNDARY LINE
v v -X- SILT FENCE
❑ A A
TREE PROTECTION
DIRECTION OF FLOW
-653.75_ PROPOSED CONTOUR
1 111111 DRAINAGE DIVIDE
CULVERT INLET PROTECTION
Z CHECK DAMS
------- ----
..... .
----- - ------ ------- SOILS LINE
. . .........
DRAINAGE WAY
........ .... --------- . ..... .. -- -----
LIMITS OF 'C RING ------- ...........
OONCURRE H
--P . IROPERTY DINE T TA R/0TECT1'ON------ NOTE:
=8.63 ACRE TP INS CL. Tt P Z'
FENCE AL G PROPERTY DURING THEJED�IMENT BASIN
11111-tOwtum tr M=wff-jr- T F' i I (ITEM TO; COM LET DIST�EINSTALLA
1 1 1 LINE FOR ORO CTION. bRAINAGf DIVIDE
LV
► Ct"f:A►n
�!F) SILT FENCE PER VESCH 3.05
DD DIVERSION DIKE PER VESCH 3.09
ST SEDIMENT TRAP PER VESCH 3.16
CE CONSTRUCTION ENTRANCE PER VESCH 3.02
TP
PROPOSED
EMBANKMENT_
VESCH 3.38
OP
OUTLET PROTECTION PER VESCH 3.18
CIP
CULVERT INLET PROTECTION PER VESCH
3.08
CD
O
525
co
SOIL STABILIZATION MATTING VESCH 3.36
CR
ELEV=522.00
D
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SEDIMENT
BA
MA
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INLET
STA:11+60.75
STA:,
0+83.41
TP: 518.75
INV OL
IT: 511.(
INV It:
506.00
520
INV
OUT:
505.90
520
515
515
7
510
510
24'
RCP 11177.31
LF
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505
24" R
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10+00 10+50 11+00 11+50 12+00
SEDIMENT BASIN OUTFALL
'IN RISER
C
j
a Rift.
#ANN I
LE:L7E:1VU
LIMITS OF LAND DISTURBANCE
DIVERSION DIKE
BOUNDARY LINE
v v -X- SILT FENCE
❑ A A
TREE PROTECTION
DIRECTION OF FLOW
-653.75_ PROPOSED CONTOUR
1 111111 DRAINAGE DIVIDE
CULVERT INLET PROTECTION
Z CHECK DAMS
------- ----
..... .
----- - ------ ------- SOILS LINE
. . .........
DRAINAGE WAY
........ .... --------- . ..... .. -- -----
LIMITS OF 'C RING ------- ...........
OONCURRE H
--P . IROPERTY DINE T TA R/0TECT1'ON------ NOTE:
=8.63 ACRE TP INS CL. Tt P Z'
FENCE AL G PROPERTY DURING THEJED�IMENT BASIN
11111-tOwtum tr M=wff-jr- T F' i I (ITEM TO; COM LET DIST�EINSTALLA
1 1 1 LINE FOR ORO CTION. bRAINAGf DIVIDE
LV
► Ct"f:A►n
�!F) SILT FENCE PER VESCH 3.05
DD DIVERSION DIKE PER VESCH 3.09
ST SEDIMENT TRAP PER VESCH 3.16
CE CONSTRUCTION ENTRANCE PER VESCH 3.02
THE FIRST
,OF THE :AM]
INSTALL TREE PROTECTIO�
E WITH NO
F.4 NCE WI S61L
fRESPAS$ING SIGNS -VYPE
1114" "am,11 Z
TP 1/ALONG PROPERTY LINE /58C MWJ I Z'
FOR PROtECTION. DC
Z
Z
4QTE-/MH SHA 6JE INSTALLED
x AT L OF-FUITUf�E D SO
,-7THA/T PIP AND IRIPRAP CZ E----
SALVAG AND nuz�t=u DURING/
DD
S
PROPOSED/' TIJE FIN BUILP-OUT!
Ts TEJMPORARY -520
X STOCKPILE PROP D MH
... ..... .... x mm 23.55'��
__AREA TO BE _EUM
ENCOMPASSED �ss
INA E DIVIDE
Z BY SILT FENCIE.
/P OP ED j3AFFLE
OP
T x
/A-1 8222 sf,
/ , S.EDIMEN -B-ASrN/, L=�03'
PHASE We=A/L=90'
bUIL - ----- ------ _re7�.2q z/
yp�/ z.
7203
Q.60- - ------
D
1EZW X
min. C"
TP A�D T /MPRAP
AT S)-OPE
X
6?0
X
7 AAJ 2
RO 0 D 24" 111 BARREL
IpV i - - :�504-
4 z lk/505.6�INV OY7 .6;
.1 A41- S=5 68%�'-
7-
MINIMUM 'A PROPOSE
NOTE: CONTRACTOR SHALL MA IN, &A M
ADJACENT 48" RCP
GRAVEL ROAD�70 THE, THEAb
PROPE E'OF SB
IL PROPERTY OWNER. TWIS ROADWAY SHALL BEQLEAR,----
PE
RISER,,.,,
RCP III BARREL
CLEAN ANb-Q1PERATIONAL`AT ALL TIMES. PROPOSED 24"
00
F.R,9POSED,,., ,.�..._ \ \
IT IVIIPOERARY
;T9CKPILE--
AREA TO BE
ENCOM PASSER .
11 T PF=KI(-P
INV IN: 511 , INV OUT-50"-1
Z =7731-';S=6.47-Xj/
\A
SAFETY F
/POSEO/SAF/ ,F
N\-- \ PROVOS
SIGNS READING "DANGER,/
QUICK/6ANE(, DO OT ENTER"'
- ------- E�.. rOR-(?F V
.561.3
00)
A
\ -7 A=16 zw- sf -j
ED W/L,-
PRO`PQS
-A/L
EAS, We�- =88'
EMENTTO BE PRO RlkAP//
% \ ---- I
Ix
X
t. . ..... . DEDIC&TED L/W 2 35 1// EMERG)ENCY SPJZLW/&
V\
W/L DC' 6"Wx51�;"� (TYP.) .112 1�1)✓20'(W), 3'(D)
JEXISTING �26
RS CONSTRUCTION ROAD S LIZATI. N3: I
-R
TO
SHALL BE APPLIED OVER-RARKI REA REMAIN STO�E OYTFAALL �LEV-521 00
a 7
AS EL-.< ""I I
OF INTO\BAS'
EL. TOP OF ISPILiiWAY SHALL NOT/
AND CONSTRUCTION ENTRANC 0 0'
THAT ARE NOT PAVED. CONTRA 7.8 7- X BE PONS- Ep ON FIL�j
W W SPjLLW Y TO BE INSTALL D
RA R---' �/0-4pd-,-O FRUI/bT
--w I
-7 W W
W �V- w w w 5 w w W
SHALL USE 21-A STONE - MiNIMU \ I
THICKNESS= 4" ON PARKING AREA, D I EL. TOP OF, 0: NATUR�L GROUND AINIM E-4)VVIDE-il
RAI �WI-L 5-26,.4
ON CON5TRUCTIORENT CE. SF Ttj IRE
-- - ---- -® 13
El ,5 ACDKII G
Mir 11�w
-to
east MMI I I iw� I llwwllvoo�!
oil,
N� 11?��L I IREE 119ITS OF CLEARIN
T PE CONCUR, REN I WITH
TECTION FENCE MOPERTY LINE
ALORY PROPERTY LINE
DRAI AGE D IDE KII { I �. /... / \ \ 1 i i 4 / / / / ; /
-j- =8.�3 AC ES
F R PROTECTION}.
1A
Z-/
L--j
V-1
L -J
r x
GRAPHIC SCALE
40 0 20 40 80 60
IN FEET
1, inch = 40 ft.
NOTE: CONTRACTOR TO PROVIDE SIGNS AS
SHOWN AROUND THE SEDIMENT BASINS AND
SEDIMENT TRAPS STATING: "DANGER, QUICK
SAND, DO NOT ENTER"
It;
Is C4 T R. COLLINSZ f-�
I(-) No. 35791
,o 7
OXAL
TP
TREE PROTECTION & PRESERVATION PER
VESCH 3.38
OP
OUTLET PROTECTION PER VESCH 3.18
CIP
CULVERT INLET PROTECTION PER VESCH
3.08
CD
O
ROCK CHECK DAMS PER VESCH 3.20
co
SOIL STABILIZATION MATTING VESCH 3.36
CR
CONSTRUCTION ROAD STABILIZATION VESCH 3.03
THE FIRST
,OF THE :AM]
INSTALL TREE PROTECTIO�
E WITH NO
F.4 NCE WI S61L
fRESPAS$ING SIGNS -VYPE
1114" "am,11 Z
TP 1/ALONG PROPERTY LINE /58C MWJ I Z'
FOR PROtECTION. DC
Z
Z
4QTE-/MH SHA 6JE INSTALLED
x AT L OF-FUITUf�E D SO
,-7THA/T PIP AND IRIPRAP CZ E----
SALVAG AND nuz�t=u DURING/
DD
S
PROPOSED/' TIJE FIN BUILP-OUT!
Ts TEJMPORARY -520
X STOCKPILE PROP D MH
... ..... .... x mm 23.55'��
__AREA TO BE _EUM
ENCOMPASSED �ss
INA E DIVIDE
Z BY SILT FENCIE.
/P OP ED j3AFFLE
OP
T x
/A-1 8222 sf,
/ , S.EDIMEN -B-ASrN/, L=�03'
PHASE We=A/L=90'
bUIL - ----- ------ _re7�.2q z/
yp�/ z.
7203
Q.60- - ------
D
1EZW X
min. C"
TP A�D T /MPRAP
AT S)-OPE
X
6?0
X
7 AAJ 2
RO 0 D 24" 111 BARREL
IpV i - - :�504-
4 z lk/505.6�INV OY7 .6;
.1 A41- S=5 68%�'-
7-
MINIMUM 'A PROPOSE
NOTE: CONTRACTOR SHALL MA IN, &A M
ADJACENT 48" RCP
GRAVEL ROAD�70 THE, THEAb
PROPE E'OF SB
IL PROPERTY OWNER. TWIS ROADWAY SHALL BEQLEAR,----
PE
RISER,,.,,
RCP III BARREL
CLEAN ANb-Q1PERATIONAL`AT ALL TIMES. PROPOSED 24"
00
F.R,9POSED,,., ,.�..._ \ \
IT IVIIPOERARY
;T9CKPILE--
AREA TO BE
ENCOM PASSER .
11 T PF=KI(-P
INV IN: 511 , INV OUT-50"-1
Z =7731-';S=6.47-Xj/
\A
SAFETY F
/POSEO/SAF/ ,F
N\-- \ PROVOS
SIGNS READING "DANGER,/
QUICK/6ANE(, DO OT ENTER"'
- ------- E�.. rOR-(?F V
.561.3
00)
A
\ -7 A=16 zw- sf -j
ED W/L,-
PRO`PQS
-A/L
EAS, We�- =88'
EMENTTO BE PRO RlkAP//
% \ ---- I
Ix
X
t. . ..... . DEDIC&TED L/W 2 35 1// EMERG)ENCY SPJZLW/&
V\
W/L DC' 6"Wx51�;"� (TYP.) .112 1�1)✓20'(W), 3'(D)
JEXISTING �26
RS CONSTRUCTION ROAD S LIZATI. N3: I
-R
TO
SHALL BE APPLIED OVER-RARKI REA REMAIN STO�E OYTFAALL �LEV-521 00
a 7
AS EL-.< ""I I
OF INTO\BAS'
EL. TOP OF ISPILiiWAY SHALL NOT/
AND CONSTRUCTION ENTRANC 0 0'
THAT ARE NOT PAVED. CONTRA 7.8 7- X BE PONS- Ep ON FIL�j
W W SPjLLW Y TO BE INSTALL D
RA R---' �/0-4pd-,-O FRUI/bT
--w I
-7 W W
W �V- w w w 5 w w W
SHALL USE 21-A STONE - MiNIMU \ I
THICKNESS= 4" ON PARKING AREA, D I EL. TOP OF, 0: NATUR�L GROUND AINIM E-4)VVIDE-il
RAI �WI-L 5-26,.4
ON CON5TRUCTIORENT CE. SF Ttj IRE
-- - ---- -® 13
El ,5 ACDKII G
Mir 11�w
-to
east MMI I I iw� I llwwllvoo�!
oil,
N� 11?��L I IREE 119ITS OF CLEARIN
T PE CONCUR, REN I WITH
TECTION FENCE MOPERTY LINE
ALORY PROPERTY LINE
DRAI AGE D IDE KII { I �. /... / \ \ 1 i i 4 / / / / ; /
-j- =8.�3 AC ES
F R PROTECTION}.
1A
Z-/
L--j
V-1
L -J
r x
GRAPHIC SCALE
40 0 20 40 80 60
IN FEET
1, inch = 40 ft.
NOTE: CONTRACTOR TO PROVIDE SIGNS AS
SHOWN AROUND THE SEDIMENT BASINS AND
SEDIMENT TRAPS STATING: "DANGER, QUICK
SAND, DO NOT ENTER"
It;
Is C4 T R. COLLINSZ f-�
I(-) No. 35791
,o 7
OXAL
-M
70-*.Al
1
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13
092033
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SCALE
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=40' c
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70
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70
1524 DD 5 A`U I M N I bi
/>-SC E:1 " =30`�'
52
PROPOSED BAFFLE
/
L =180 1
/ A =1511 2�/�sf
5 2.5
L/we =2.14
1
0
PROPOSED- \ \'
�� _ \ 48" RCP III
RISER \
I
\ `\ 523.0 t
\ ROPOSED BAFFLE` \ `` j \ �• �, j ,\
\ -207'
\ \A =1514 sf � j � �j j j �D
We A/L =73'
L/We =2.84 ` \ 52}.0 j
\ \
\ 6'Wx5'U �"D (l�YP.) '\STON OUTFALL
\TS \ \� \� INTO BAST
525.0
\ PS
Sediment Basin #1 Design
*t. MIN. 1' "SPILLWAY
2• WITHOUT
rr1%v1_v0 Vln I
F IM =5 .55'
/ l
i
co
I % /
PO POOD 1 / j �
�< AN T T RI�F2A1'
AT 0 0 OPE
14'(W 28'(L); 2'(D)
�l � s
f � /
jPR 2-50�. EDNINV RCP 111 BARREL
I OUT: 504,0---
\L=33. S= 5.68 %D
' / t
PROPOSED 24" CP III BARREL
�INW IN: 511.0; IN7OUT: 506.0, -
11� =77.31'�S= 6.47% /��
h � %
/PROPOSED SAFETY FENCE
WITH SIGNS READING "'DA GEI
/ Q�I'CK SAND, D�„rNOT E ER"
PROPOSE RIPFF�AP
EMI RGE CY SPILLWAY
11,21(L), 2 '(W),
ELEV =5 1.00
SPILL YS / ALL NOT
BE C STIR CTED ON ILL -
SPILLWAY TO BE )NST/ LLED/
ON NATURAL GROUND i
CREST OF EMERGENCY
i SPILLWAY
drainage area (acres) 8.75 DESIGN HIGH WATER
basin volumes: (using 2' contour intervals) (rs S'°R"` ELEV.)
elevation (ft) contour area (so volume (cy) o.s'
511.00 8244.7 0 .. "'" ' °' -
Po5LR CREST .
512.00 8988.6 319.0 : -
- DRY' STORAGE DEWATEPoNG
514.00 10572.7 1042.7 0E1�
516.00 12285.4 1888.5 • WET • STORAGE
518.00 14126.6 2866.0
520.00 16096.5 3984.5 SEDIMENT CLEAHOUT PrnHt - --
522.00 18195.0 5253.8 �" Too M Cs YO/ACAER ETwCED
wet storage:
wet storage required (cy) (67 *DA *2) 1172.5 design Nigh water (ft) 519.75
dewatering orifice elevation (ft) 515.5 top of daim (ft) 522.00
wet storage provided at this elevation (cy) 1677.1 top widths of dam (ft) 15.0
available volume before cleanout (cy) (34 *DA *2) 595.0 bottom olf basin (ft) 511.0
cleanout elevation (ft) 512.8 approx !bottom dimensions: 91'x92'
distance from cleanout to orifice (ft) (> 1') 2.7 upstrea►Tn face slope: 2:1
downstream face slope: 3:1
dry storage:
dry storage required (cy) (67 *DA *2) 1172.5 baffles: YES
principle spillway crest (ft) 518.75 length off flow, L (ft) 10
dry storage provided at this elevation (cy) 1608.3 effective: width, We (ft) 1511
diameter of dewatering orifice (in) 7.0 L / We (baffles not required if > 2) 0.0
diameter of flexible tubing (in) (orifice +2 ") 9.0
collars: YES
runoff: depth of water at spillway crest (ft) 7.75
C (use 0.45 for bare earth) 0.6 slope of iupstream face (Z1) 2:1
tc (min) 10.6 slope of Ibarrel (Sb) 6.5
1 2yr 4.0 Q 2yr 21.2 length off barrel in saturated zone (Ls) 62.82
1 25yr 5.9 Q 25yr 34.0 number (collars required 2
dimension of collars 5.14.1
principle spilNvay:
available head (ft) 1.0 emergency spillway: YES
diameter riser (in) 48 required) capacity (Q25 -Qp) (cfs) 0.0
spillway capacity, Qp (cfs) 40.0 bottom vvAdth (ft) 20
diameter trash rack (in) 72 slope of 1ebst channel (fVft) 33
barrel length (ft) 77 minimur n length of eiatchannel (ft) 4
head on barrel through embankment (ft) 15.0 crest of ;spillway (ft) 521.00
diameter of barrel in 24
SEDIMENT BASIN SB 6' TOPSOIL
EXISTING GROUND NTS
EMERGENCY SPILLWAY ELEV =: 521.00
-I 72" DIA. 21 " HIGH
TOP OF DAM ELEV = 522.00 16 GA. ;GALV STEEL
\ ANTI- VORTEX DEVICE
- 25 )R STORM 1.0' MIN.
ELEV = 519.75 EMBANKMENT HEIGHT 14'
I�I IIII
VI -
III_ RISER TOP ELEV= 518.75' 1.0' MIN. 48" DIA. CMP RISER
\1111111 DRY VOLUME ELEV.
I -III REQUIRED = 515.7' "� 1 , SCARIFIED KEY FOR
�I4 =11 7 " DIA. DEWATERING ill SOIL COHESION
III -
DEVICE
=III- INV OUT= 504.0'
UPSTREAM TOE OF DAM EXISTING' GROUND
MIN. 30" COMPACTED)
SOIL OR AGGREGATE OVER
BOTTOM OF BASIN BASE PLATE
ELEV. = 511.00 8 x8'x1/4" THICK GALV. CLAY CORED DAM
' STEEL BASE PLATE KEYED INTO THE NOTE
EXISTING GROUND FREEBOARD PROVIDED =2.25'
IN IN = 511.00'
SEGMENT 1: ,24" RCP III, L= 77.31', S=6.47%
(2) 4.8' X 4.8' GAL V. STEEL SEGMENT 2: 24" RCP III, L= 33.44, S =5.68%
ANTI -SEEP COLLARS
F
t 1
1
1 P i PO SAF'
,,SI S DINT
1 Q '1C SA O t
I
OS IF
j
UP
1 \ 1
\ ` 1 �O
j 1R s 1
l
1 � I
,I.
i 1
I
,
I�
O
E
�I
�ALE:1 "T30'
574.0,,
572\Q
T
I
,MIN. 12 X 00'
' P�VED
I
CE WTASH
RACK
/
M
STONE 70' MIN.
CONSTRUCTION
ACCESS 1111-3" SM -2A ASPHALT
TOP COURSE
2% �2%
\-6" MIN. 21A AGGREGATE BASE
PROFILE
STONE - 70' MIN.
CONSTRUCTION ASPHALT' PAVED
ACCESS— F �WASHRACW
i
!! r
SH
SLI
1 -992 3.20
ROCK C:Hk.'ff DA-Af
2 AC,P.F.S 03 I RSS OF DTZATVaGF, AREA:
Farm 1.
e
Cm11
iramow; .__
(CC'6NSTR4:M. WW)
kTHIF i1 .
CUAR�'ACGT.E4n:C'
t :O Af� R E 3 OF D a1NAGF, AW.A:
r :j,r, : tuav
kwT 0
nca
a -g .,RAP i
_j
Som o: V& Ubwc " plaic.12W -1.
HI • 137
ON SLOPES, STRIPS
N TECTIVE COVERINGS
MAY BE APPLIED ACROSS BERM
THE SLOPE.
WHERE THE MATERALBOVE A HTHE ERM AND THE 7` I
BEHIND THE BERM. I
I I I
fit
BRING MATERIAL DOWN TO A LEVEL •
L AREA BEFORE STEEP
TERMINATING THE INSTALLATION. TURN THE END SLOPE
UNDER 4 AND STAPLE Al 12 INTERVALS
12"
ON
SLOPES, APPLY
11♦
..
IN DITCH APPLY PROTECTME COVERING AR _ �♦♦ 1 ♦i1 ♦ ♦♦ �Ii �D- 0= 3src• DIRECTION I FLOW. 11= N♦ ♦ I _eg- 3 AND ANCHOR J
THE OINING POSSIBLE. - / j1 j�li�iiiiiiri��
]]�� ♦ I�riiiiiirrr�
'- u=u
Tf 7L-=
SOIL STABILIZATION BLANKET ./
o
/ r i . EROSION CONTROL I'
.SEDIMENT BASIN BAFFLE DETAIL
NO SCALE
EXISTING SHEETS OF 4x8 xj' EXTERIOR
PA VEMEN T PLYWOOD OR EQUIVALENT r6"
II
II
1
Sediment Trap 1 design_...._.
SECTION
A - A
A minimum water tap
4'
I
I'
area (acres) ( <3)
11 12i
-
�' VARIABLE ♦.
.... _
.drainage _
trap VOlum2s ( I
constant pressure. Wash
CREST DF STbPiE•WEIR
YARmLr'
approved settling area
elevafton (ft)1 area (sf) t
wolume('cy)1 -._ _..__
ELEV.
entering storm drains,
1.0, ... __
L 564001 748 4
0.01
o
i
566 00 1482.91
. ..
8111 _
_ __
T__,____
DRY STOP
_' a
f VARIABLE:
[
_ - _ _..._ .. _ _ • _ .! ... _.v 568 00 e 2345 4
21 7 (_..d.
221.7-
N
__
W
Uj
d'
..____. ....,
i
(n
'r MAX.
®
...._
I
E,
;Q
'.'
FLLTER CLOTH
ORIpNAL .. ......
GROUNO
..... _. ..,._... ,._ ._
I... .:_.._._._. _._,. _..�..,_.. __.. _...... ....... _ .... ___.. ..... -.... ..... _. .......... _.._.__-
wet stora
vole( storage required__(cy)__(67 *DA) .•_ -_ 75.0
fSSEE PLATE 3. 3 -1
.WOO AGGREGATE
ELEV.
CLASS T. RPW'
bolt om of stone weir ft
565.81
I
wet rf a P_ d ea d i s elevatio_n
.... LI
;
{
_._. -- ..__ .._.._.� r
sidt eths
slo _.s_t_oo.
w ea .. t srtoovr a
__. _ .._7. _5...._0
.,'
2:1 I
_...... . -_ ._ .. ..._ I
i
..
1
I
N
'
,,weir,longtri(ft }Y
6.V i
O
_
I
564
dr�r storage required (cy) (67 *DA) _.(_,
._._:.._.____�__.
.. .__._75.0;
I „bottom trap dimensions L._-
..._..__._...__ _._ - ...12�?6..._
....__, ...
crest of stone weir ...__ __ - _.._ ........._.___ -.,
_._._._5617 Oj _..__.,_...__..__._..._.'top
of dam elevation (ft)._._.... __. _! . .............._
I
_. L __.. ......5681..._..._.._......,.,.
d stora a rovided at this elevation
slope of dry storage sides €
2:111
top trap dimensions i I
28'x82'1
STONE 70' MIN.
CONSTRUCTION
ACCESS 1111-3" SM -2A ASPHALT
TOP COURSE
2% �2%
\-6" MIN. 21A AGGREGATE BASE
PROFILE
STONE - 70' MIN.
CONSTRUCTION ASPHALT' PAVED
ACCESS— F �WASHRACW
i
!! r
SH
SLI
1 -992 3.20
ROCK C:Hk.'ff DA-Af
2 AC,P.F.S 03 I RSS OF DTZATVaGF, AREA:
Farm 1.
e
Cm11
iramow; .__
(CC'6NSTR4:M. WW)
kTHIF i1 .
CUAR�'ACGT.E4n:C'
t :O Af� R E 3 OF D a1NAGF, AW.A:
r :j,r, : tuav
kwT 0
nca
a -g .,RAP i
_j
Som o: V& Ubwc " plaic.12W -1.
HI • 137
ON SLOPES, STRIPS
N TECTIVE COVERINGS
MAY BE APPLIED ACROSS BERM
THE SLOPE.
WHERE THE MATERALBOVE A HTHE ERM AND THE 7` I
BEHIND THE BERM. I
I I I
fit
BRING MATERIAL DOWN TO A LEVEL •
L AREA BEFORE STEEP
TERMINATING THE INSTALLATION. TURN THE END SLOPE
UNDER 4 AND STAPLE Al 12 INTERVALS
12"
ON
SLOPES, APPLY
11♦
..
IN DITCH APPLY PROTECTME COVERING AR _ �♦♦ 1 ♦i1 ♦ ♦♦ �Ii �D- 0= 3src• DIRECTION I FLOW. 11= N♦ ♦ I _eg- 3 AND ANCHOR J
THE OINING POSSIBLE. - / j1 j�li�iiiiiiri��
]]�� ♦ I�riiiiiirrr�
'- u=u
Tf 7L-=
SOIL STABILIZATION BLANKET ./
o
/ r i . EROSION CONTROL I'
.SEDIMENT BASIN BAFFLE DETAIL
NO SCALE
EXISTING SHEETS OF 4x8 xj' EXTERIOR
PA VEMEN T PLYWOOD OR EQUIVALENT r6"
EXISTING .J
2% 2% PA VEMEN T
2% 12' MIN.. �-
i
r -� --
*MUST EXTEND FULL WIDTH L AC� POSITIVE' DRAINAGE SEDIN�fENT
OF INGRESS AND EGRESS TO 1 TO SERI Cg DEVICE
OPERA TION
PLAN
r-4 12' MIN. -
1. SET POSTS AND EXCAVATE - A 4'X4"
TRENCH UPSLOPE ALONG 7HE LINE
OF POSTS.
i
POSI TI VE DRAINAGE
VICE FLOW
FILTER CLOTH--I
II
II
1
RISER CREST ELEVATION
SECTION
A - A
A minimum water tap
4'
I
I I
POSTS 'MIN. SIZE 4" SQUARE
shutoff valve supplying
a
wash hose with
diameter or 1.5 inches for adequate
constant pressure. Wash
OR 5" ROUND SET AT
EXISTING .J
2% 2% PA VEMEN T
2% 12' MIN.. �-
i
r -� --
*MUST EXTEND FULL WIDTH L AC� POSITIVE' DRAINAGE SEDIN�fENT
OF INGRESS AND EGRESS TO 1 TO SERI Cg DEVICE
OPERA TION
PLAN
r-4 12' MIN. -
1. SET POSTS AND EXCAVATE - A 4'X4"
TRENCH UPSLOPE ALONG 7HE LINE
OF POSTS.
i
POSI TI VE DRAINAGE
VICE FLOW
FILTER CLOTH--I
SECTION
A - A
A minimum water tap
of
1 inch must be
installed with' a minimum 1 inch ballcock
shutoff valve supplying
a
wash hose with
diameter or 1.5 inches for adequate
constant pressure. Wash
water must be
carried away from the entrance to an
approved settling area
to
remove sediment.
All sedimlent shall be prevented from
entering storm drains,
ditches
or watercourses.
PAVED WASH RACK
NO SCALE
8' LEAST 3' INTO THE GROUND
2. STAPLE WIRE FENCING TO THE POSTS.
J. ATTACH THE FILTER FABRIC TO
THE WIRE FENCE AND EXTEND
I T INTO THE TRENCH.
FLOW
II III
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
4. BACKFILL AND COMPACT THE
EXCA VA TED SOIL.
(i) SILT FENCE (WITH WIRE SUPPORT)
NO SCALE
(STD. & SPEC. 3.05 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
_4" P
SCO R. COLLINS�4
No. 35791 ,�
-71111
IONAL E1y01��
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�5 POST- DEVELOPMENT: IN ACCORDANCE w/ THE APPROVED PRELIMINARY PLAN,
C \I, \ \! �t PRE- DEVELOPMENT: EXISTING, OFFSITE SWALE � ?. THIS PORTION OF PRE - DEVELOPMENT PERVIOUS DRAINAGE
,� i `•`',, 1 1 ' EXISTING, OFFSITE SWALE T 0
\� , I AT THE TOE OF FILL OF ) I „ WAS REDIRECTED FROM PRE - DEVELOPMENT D.A. 1 NORTH SIDE �p��
1 k I o I, �f # ( ) AT THE TOE OF FILL OF �'
1 �` -. SPORTS FIELD DIVERTS D AI G `s 1 l't`l \\ `, \\ ,: TO POST - DEVELOPMENT D.A. #2 (SOUTH SIDE) DUE TO D.A. #1:
I , ,•t \ CALE ELEMENTARY SCHOOL 's `�','� •- .__- -.._ -, _ _ �
\ \'\ si 1\ 1, , ' \\ ` \ THE CUTTING OPERATIONS. THE RESULT IS THE PRE-
_ CALE ELEMENTARY SCHOOL s
- - -_ 1! 1 ' AWAY FROM THIS DEVELOPMENT, , 1
„\
- -- \y-
t � \ \ \ '` � _ SPORTS FIELD DIVERTS DRAINGE
Oac
1 1 / , , --
1 1 f _ - _ _�, , I ' ` ',�;, J i � \,_.. /�' '! ; \ \ `',' DEVELOPMENT D A #1 HAS A GREATER DRAINAGE AREA - OUS 59 WQ SC T R. COLLINS'Z
�� \1 ' J , t \\ /11 - ,, ' IM81 (DETENTION) AWAY FROM THIS DEVELOPMENT, 0 H
/
!/' CREATING A HIGH POINT 1 ' ' i \�'•- '! \ s
_____ _. APPROXIMATELY AT TILE t :, ,_,_>, --/- \
1 ► 1, i , / 5791 11�-
- - -- -1
THAN POST- ,
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' I,,` '`l ` l " -- -- • -- -- - I \,� 1� J t`i 11 _ - -- - - -- ---------
-- - -- -- - BE SALVAGED,
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- (Ii y' 1d.1 ;n ® D.A.= 3,69ac. NOTE: 1 L9
I '' 111� ' /'. � ' I� 1 s IMPERVIOUS= 42 (WQ) THE SEDIMENT BASIN SHALL BE CONVERTED TO A
i11,1� General construction notes for ,' t
3 4/ + \+ � 1� ® 3 111' ` ' \ ", V CN =81 DETENTION SWM TYPE III RETENTION BASIN IF CONSTRUCTION
,' ' ` Storrnwater Management �71anS `a`` / `� ' "' '`' ® Tc =8min. (DETENTION) OF PHASES III & IV IS DELAYED. E T- 4
I!.," / } I
1 3 / � \_� ® 1. All dams _send-- cGnstruct d-TitF� to be within -\ ." t 1 \' 1 1 ) SE -- -- i t--
THIS SHEET & SWM�2 FOR DETAll_S._THE-F rn
r;, o� �', 'r� • - ' 9 of maximum dr densit and 2% of ) > :•t �. '' +, J -
Q,•1', \, \„9 I ' __ - --- Y Y . } �, ♦ -- -- -- -- _-. - - - -- PLAN - AND- NtS ='(3 CALCULATIONS WILL BE PROVIDED '
/ `'t�``I `;It _ ---- -- -`` optimum moisture content. All fill material to t +��� `' ,
11). q 13J l -- -�" { h, , I . _ WITH THE AVINITY FINAL WPO SUBMITTAL. 1 . rn
(It"Y''/ y' , i -- -: be approved by a geotechnical engineer. A \"
�t� ` , I geotechnical engineer is to be present during
It , � � 1
I l Ili I,. I t
1 t ,� ;` ® ®' construction of dams.
I.1 // ' '-- 'E' ,�o `,, 2. Pipe and riser joints are to be watertight
/ , ; J ;t' ' within stormwater management facilities.
J'� t1 -, 3. For temporary sediment traps or basins
,/ 01{ � ____ which are to be converted to permanent `
•I'; / \ \ -- stormwater management facilities; conversion
11, / ti _--- -- A1�I IC SCALE is not to take place until the site is stabilized
h I _ „
--- tya - --- - and permission has been obtained from the _ - ` -'--
-- ` \� , _ : -._ 80 0 40 W 160 320
■ County erosion control inspe"- ctor,_ --- --
■ ■ (INt FEET) "_- .:_..__--- --"`-_._ --- `-
1 inch. = 80 ft. _ -
- r`' ----
Short Version BMP Computations For Worksheets 2 - 6
Albemarle County Water Protection Ordinance: Modified Simple Method
Plan: - -_ Avi1fdV- o.a. #2 _-._-__-_____ - Water Resources Area: _ __" - -_- DeN-0q m lit /area - ---- _-----
Preparer: FGM. PE Date: 04- Jun -10
Project Drainage Area Designation DA# 2
L storm pollutant export in pounds, L = (P(Pj)Rd12 ] ( C(A)2.72 j
Rv mean runoff coefficient, Rv = 0.05 + 0.009(1)
Pi small storm correction factor, 0.9
1 percent imperviousness
P annual precipitation, 43" in Albemarle
A project area in acres in subject drainage area, n
A=
C pollutant concentration, mg/I or ppm target phosphorus
f factor applied to RR
V required treatment volume in cy, 0.5" over imperv. area = A(1)43560(0.5/12)/27
RR required removal , L(post) - f x L(pre)
%RR removal efficiency, RR100 /L(post)
:x Offsite Awn Street
walks I _ _ IMP 90 -3_5L
F TMP 90-351, f
Iparkin Lots _ _ ____
F--,- - -
- -- -
�Gr,vel`are
as ------L---- A rea
r --
1
x 0.70 =
Structures - Area _ no_.
nc . -1225 _- 1
TMP 90-35L Reside e[-
Ex Offsite Buildings) -3750=1--
j - -1
__
ctively- grazed pasure & Area
arts and cultivated turf I 122771 x 0.08 =
Active crop land Area _
Acti op ! _ ---Ix (x 0.2.5 =_..
Other impervious Areas _ -
Impervious cover -_-_.-_-.T.__._.__T-_.-__--
I ! 0.43.
I _:
Short Version BMP Computations For Worksheets 2 - 6
Albemarle County Water Protection Ordinance: Modified Simple Method
f4an; Avsnity!_p P0. #1.- ... - -_..__,._ Water Resources Area;_...___.__._.. -_-_-- --- -_. _.::..oevelopmentArea
Preparer - __._ FG PI;_._._._ .......... - -- __ -- -.- Date: __..____... ...... ._ - _-- o3Nlay ?4 _.:..____ _ _._._._ - -.
Project Drainage`Area Designation _DA# -'! __.________.-___ __ .__-___..__.. ---- .._._......_..
L stonn pollutant export in pounds, L = [P(Pj)RV12 ] ( C(A)2.72 ]
Rv mean runoff coefficient, Rv = 0.05 + 0.009(1)
P] smait storm correction factor, 0.9
1 percent imperviousness
P annual precipitation, 43" in Albr:merle _
A project area in acres in subject drainage area, ID A: = 1 _,___._ 8_� l
C Olutant concentration, mgll or ppm target Phosphorus
f factor applied to RR
v required treatment volume in cy, 0.5' over imperv. area = A(I)43560(0.5/12)/27
I RR required remo,ol , L(post) - f x L(pre)
' %RR removal efficiency, RR100 /L(post)
subtotal ( Roads subtotal_ -- Ittem
15800! Ex Offsite Awn Street Extended -___.- - - _ 15800 e-develo mart _ _ Area deveb mont
__f? _ .___.__ _.__ _ __ �.P�t P __.._ _ ---
__-__ Proposed Tumlane Improvements _ _ 8100( Roads ___` _ . __- _subtotal (Ft�ds
_ - -- -
Avinity Drive (Pvmt, C &G, walk _ - - - - -_ _ 120001 I- - -. ---I--- - - _ Avinity Drive, Loop, Court & F
- - --- _- .____�A -.___ I (C &G and
-C _ 15800 �& driveway irr!provements)�_._._,_- �_.__ -. -__ 35900 {!
subtal �__ 58 Driveways &Walks _ subtotal i . - - �'_ . -. -- --- -. _ -
---- -_ _ _ _- 1 0
3900� { Ex Offsite Driveways & Walks _^ 10615i IDrivevrays - -- ._ - - _ subtotal__ Driverman_gs Walks _.- -_....
_.__ -2675' .and walks Southern Driw /Road 6650; Proposed Sid
--- .- ...___' - - -- �- -- I_- I TMP 90-351 Residence! 1750Proposed Dm �__ .__.__._ - -! I 10615 10615, 17190__ - _ -- --- --- -.__. -_ -_-_ __- �___ -__t__ _.__ _._._
_ -- _ _._ *__- _ I _ _ _� - - -' 8400 __. , ___ Porches Patios &
Parking Lots - . - - - -_- -_._ _ -------� llParking -E0-ti--------
ots j �_ _ - -- Parkirx,1Lois
o_ 4 �_�.- ,i.- ___.__. ___ o� I _--.___-_. ...... --F_.. __-- I- __..- _._.--- _._L_____ -_ -- - .. - -_o
- -_.___ I - -- _ -- ----- ____._ (Gravel areas Area vel -eas -
Gravel areas 1
rp" I _ 0 _ __ v _ _- _x0,70_= 0 � - I ,x0.70-- _- _-_.._� __.__4 _ -.- _ -_ . -- __.._ 1_. -_ .__. -_ -__ _.__I _. _ -_- - .-- _-- _--- ___._.. _ __ - - --.- - - -- . -- _._._. _..._. _subtotal Structures - Area rio. subtotal j( `Structures area nom -- subrtotal ctures 1225 Pro Avini Bid &walks 7800T - -- 1 7800 I> T90351Residencel____- _2150( - _,___._?__.__2150 posedAvinityBuildings
- - -- Posed ty ( 9s ) __. _- - - ----� �- __ {{ _ _ __ _ _
_ �__._ -
3750 . TMP 90-35L Residence' 1225 1 1225; _ 2150
.------- j --- - _ _ _ -�__ _ _-.- - _- - - - --. ___
4975 Ex Offsite Buildings} :- - 3750( _ -- 1 - 37501 12775 /Actively- grazed pasture & Area _.__ Actively - grazed pasture &
Actively grazed pasture & Area _ _ - J m -~ - yards and cuflivated turf.. f_, 372778lx 0 O8 _= - _29822 _ands and cult; wed turf --
9822 yards and cultivated turf ; 101446.4Ix 0.08 = ( 8116 I/Active crop hand Area -
_ -
--- -.__ -_ _ Y ____- -__ __. - __..- _____.--- _ - - -_.. _ - -- _ ._. __
Area, _ I --- _____.._.. - -_- _ _...__.___ .__�_._. -. ^1x0.25 - _ . ----- .___ ._..__.. 0 ___.-____. _._ __..",.._._....,
l (Other Impervaars Areas } Active crop land
- -_ -- _i_ _.__ -� - ___- -_ -_._ __. .- ___ --- __ L�T25m._ ____.__. ! 0
} !Active crop end T llmpervious Cover _.,11:oy Irtq�ervious Cover
0 0 I(Pfe)
- Rv( --C V
3Q %o Impervious Cover - - ^ - -T ________�.___ --� 42go r-
- Ingle) kP) � _. 0.58 3472
( 1rGkV31xV Vt5
iA-rea
__L..... _. -- -IX025 ......._
ujrl;, ve'j.1I-
tit, i;I A !
\ . w ;
t ' I' ''.\
A
„- „/ g _, r /
It r
/
{- - -
- - -
` 1 - ,/ \ i; jt _ - RA�HIC SCALE `',
I i'
�� , - • 80 0 40 80 160
ve ■ 1 L_i
■ `
( IN FEET )
1 inch = 80 ft.
__--- --- - "_
---- -- _
t-
THIS PLAN IS PROPOSED WITH THIS SET OF PLANS IN THE EVENT THE CONSTRUCTION OF PHASE III & IV ARE
DELAYED. IF THIS IS THE CASE, THEN 2 FILTERRA INLETS SHALL BE INSTALLED ON THE PRIVATE STORM SEWER
INLETS AT THE ENTRANCE ALONG AVINITY DRIVE. THE FILTERRA INLETS, WHICH HAVE A REMOVAL EFFICIENCY OF
74 %, EXCEED THE REQUIRED REMOVAL RATE OF 33% FOR DRAINAGE AREA #2. ADDITIONALLY, BECAUSE THE
DRAINAGE AREA IIS DECREASED AND THE CN's ARE SIMILAR IN THE POST - DEVELOPMENT CONDITIONS, DETENTION
WILL NOT BE REQUIRED FOR THIS DRAINAGE AREA. PLEASE SEE THE CALCULATIONS WITH THE SUBMITTAL
PACKAGE FOR ADDITIONAL DETAILS.
D.A. #3. WILL ULTIIMATELY HAVE ITS WATER QUALITY AND DETENTION MET VIA MANUFACTURED BMPs APPROVED
BY THE COUNTY DURING THE FINAL SITE PLAN APPROVAL. THE MANUFACTURED BMPs WILL LIKELY BE PLACED IN
THE AREA WHERE THE PROPOSED SEDIMENT BASIN IS LOCATED. THEREFORE, IF THE CONSTRUCTION OF THE
MANUFACTURED BMPs IS DELAYED, THEN THE PROPOSED SEDIMENT BASIN WITH THIS SET OF PLANS ATTHE
DISCRETION OF TIHE COUNTY ENGINEER & INSPECTOR CAN EASILY CONVERT THE SEDIMENT BASIN INTO A TYPE III
RETENTION BASiiq. ATYPE ill RETENTION BASIN HAS A REMOVAL EFFICIENCY OF 6S% AND EXCEEDS THE 6o%
PHOSPHOROUS REQUIRED REMOVAL RATE FOR D.A. #1. ADDITIONALLY, THE SEDIMENT BASIN HAS BEEN OVER
DESIGNED SO SIGNIFICANTLY THAT THE CONVERTED RETENTION BASIN SHALL HAVE 5.5 TIMES THE WATER
QUALITY VOLUME. ONLY 4 TIMES THE WATER QUALITY VOLUME IS REQUIRED. IF THE SEDIMENT BASIN IS
REQUIRED TO BE CONVERTED TO A RETENTION BASIN, NOT ONLY WILL THE FACILITY EXCEED THE WATER QUALITY
REQUIREMENTS, BUT IT WILL SIGNIFICANTLY EXCEED THE DETENTION REQUIREMENTS. IN COMPLIANCE WITH
MS -xg STANDARDS, THE MINIMUM 2 AND 10 YEAR OUTFLOWS MUST BE EQUAL TO, OR LESS THAN, THEIR
PRE- DEVELOPMENT FLOWS. THE 2 AND 10 YEAR PRE- DEVELOPMENT FLOWS FOR D.A. #1 ARE 3.51 cfs ,AND 14.25cfs.
AFTER THE ROUTING, THE 2 AND so YEAR FLOWS EXITING THE FACILITY ARE ONLY 1.70 cfs AND 2.36 cfs,
RESPECTFULLY. THE 2 AND 10 YEAR POST - DEVELOPMENT FLOWS HAVE BEEN REDUCED TO 48% & 17% OF THE
ORIGINAL PRE - DEVELOPMENT FLOWS. THUS DETENTION REQUIREMENTS WILL BE MET AS WELL IF THE SEDIMENT
BASIN IS CONVERTED TO A RETENTION BASIN.
320
Post- Development D.A. #1 C Values
Description -� !� C Value AT !_ sq rea (ac
Impervious Area -0,85 211225 ° 4 85
Grass - 0 .33 172103 3.95 #
Cw = 0.60
Total Area = 8.80
- -.-^wJ
_ Post Development D.A _#2_C Values _ _
Description C Value Area (sf) ,Area (ac.
Impervious Areas 0.85 59_290_ 1.36
Grass - 0.3 101882 m i 34
Cw = 0.50
Total Area = 3.70
STORMWATER DETENTION PLAN (2 YEAR)
Project Area: 924 ac. (project limits)
Area Detained: 8.80 ac.
Percent Captured: 95% (should be between 80% and 120 %)
STORMWATER DETENTION PLAN (10 YEAR)
Project Area: 9.24 ac. (roughly equal to limits of disturbance)
Area Detained: 8.8 ac.
Percent Captured: 95% (should be between 80% and 120 %)
Q
o
Q
Z
W
Z
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C
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a,
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0 ¢
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Remarks
Pre - Developed D.A. #1
8.35
3.51
-
-
-
Remarks
Post-Developed D.A. #1 '
-
-
8.80
-
1.70
Pre -Dev. > Post Dev. Flows
-
Pre- Developed D.A. #2 •
4.14
12.54
-
-
-
pre -Dev. > Post -Dev. Flows
Post- Develo D.A. #2
-
-
3.69
10.03
-
pre -Dev > Post -Dev. Flows
-
STORMWATER DETENTION PLAN (10 YEAR)
Project Area: 9.24 ac. (roughly equal to limits of disturbance)
Area Detained: 8.8 ac.
Percent Captured: 95% (should be between 80% and 120 %)
a H
Z's
h
Z
H v
Z
Z
W
Z
W w
W
0-J
0`':
¢
0
0 ¢
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W-
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LL
W
W¢
nn
oW
tuQ
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ao
au9
art
a��
00
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Remarks
Pre - Developed D.A. #1
8.35
14.25
-
-
-
pre -Dev. > Post -Dev. Flows
Post-Developed D.A. #1
-
-
8.80
2.36
-
Pre- Developed D.A. #2
4.14
2297
-
-
-
Post-Developed D.A. #2
-
-
3.69
19.40
-
Pre -Dev. > Post -Dev. Flows
-
MIN. REQUIRED FOREBA Y
VOLUME =4, 401 cf
FOREBA Y VOLUME
PROVIDED =5, 095cf
• 100 YEAR
W.S.E.= 520.89
3 0 YEAR
W. S.E. = 519.75
2 YEAR
MIN. REQUIRED WQV W. S.E. = 51813
(4x) =35, 204cf
WQV PROVIDED= 48,343cf
-3' WIDE FOREBAY TOP
OF DAM ELEV. = 516.10
L6
15' WIDE TOP OF DAM
ELEV. = 522'
WEIR ELEV.= 521.0
30' WIDE RIPRAP WEIR
OUTFALL CHANNEL W/
5.-1 SIDE SLOPES
MA ;X. EMBANKMEN T
NOTE:
5.9 OF
' THE SEDIMENT BASIN SHALL BE CONVERTED TO A
M. W. S. E.
PONDING tty� ,Rp -- 10 AQUATIC BENCH SWM TYPE III RETENTION BASIN IF CONSTRUCTION
516. 10' t;�ro'firrlv� ars-6.kx
N N DEPTH : a OF TOWNHOME PHASES III & IV IS DELAYED. SEE
,
ii ORIFICE COEFF.= 0.6k k,s °' y THIS SHEET & SWM -2 FOR DETAILS. THE FINAL SWM
PLAN AND MS -19 CALCULATIONS WILL BE PROVIDED
5' RIP- RAP
WITH THE AVINITY FINAL WPO SUBMITTAL.
BOTTOM OF LINED SPILLWAY, ,
FOREBAY ELEV. =514.0 48" RCP MOLT -STAGE RISER. MIN. 8 WIDE ® TOP & PROPOSED EW -1
ELEV. 510.0 19' DEEP IMPERVIOUS AND OUTLET RIPRAP
ONE �7 ORIFICE AT ELEV. 516. 10, 24" RCP BARREL CORE & CUTOFF AT 0% SLOPE
BOTTOM OF RETENTIO RISER TOP ELEV. AT 519.75' 85 LF ® 0.009' TRENCH WITH 1:1 SIDE 14'(W); 26'(L); 2'(D)
BASIN= 510.0
INV. IN= 506.00 SLOPES. SEE DETAIL ON
INV. OUT= 506.00' THIS SHEET FOR
ADDITIONAL INFORMATION.
1iETENTION BASIN
(NOT TO SCALE')
Homogeneou9 tilt
I
' \`,`- `,'° '4' mitt `
ut off trench-4' below suitable
i ' materioi (
suit or rack L .....•....., - - . _ -. J
TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
Deli or gravel
-Pipe outlet � .h
Coarse3 f201
Perforated collector oroun 's Blanket drain
Foundation drain
FOUNDATION DRAIN BLANKET DRAIN
ch" dWm
Sand, grmd or rack
outlet
Rack or gravel
-Rock too �fQ. drain
- a2sa �v
114Tr filter Transition fitter
CHIMNEY DRAIN TOE DRAIN
4 Inflow Hydrographs
OUTPUT:
BasinFlow printout
Hydrograph o
z
o
~'
invert (ft)
SCS
Routing Method: storage- indication
INPUT:
name: i -Year SCS Method
1
>
Area (acres) 8.800
Hydrograph o
V Basin: Converted Retention Basin- Type III
CN 81.000
Routing Summary of Peaks: '1 -Year SCS Method
0.1300
Type 2
inflow (cfs) 18.036 at 11.92 (hrs)
8 Contour Areas
rainfall, P (in) 3.500
discharge (cfs;) 1.612 at 12.44 (hrs)
Elevation(ft) Area(sf) Computed Vol.(cy)
time of conc. (hrs) 0.1300
water level (ft) 517.963 at '12.50 (hrs)
510.00 5030.00 0.0
time increment (hrs) 0.0200
storage (cy) 2871.914
512.00 67o8.00 433.3
time limit (hrs) 30.000
1.00
514.00 8795.00 1005.7
fudge factor 1.00
Hydrograph 1
515.00 9982.00 1353.2
routed true
'Routing Summary of Peaks: 2 -Year SCS Method
516.00 13732.00 1790.5
peak flaw (cfs) 18.133
inflow (cfs) 19.76o at 11.92 (hrs)
518.00 16o97.00 2894.1
18i95.00 4163.4
peak time (hrs) 11.930
discharge (cfs;) 1.697 at 12.48 (hrs)
520.00
volume (cy) 2019.878
water level (ft) 518.133 at 12.52 (hrs)
522.00 20422.00 5592.9
1
storage (cy) 2973.449
Start- Elevation(ft) 516.10 Vol.(cy) 1841.57
Hydrograph 1
SC5
��Hydrograph 2
out of riser
name: 2 -Year SCS Method
Routing Summary of Peaks: so -Year SCS Method
4 Outlet Structures
Outlet structure o
Area (acres) 8.800
{ inflow (cfs) 37.171 at 11.92 (hrs)
Orifice
CN 81.000
i discharge (cfs) 2.356 at 12.46 (hrs)
name: Orifice
Type 2
iwater level (ft) 519.747 at 12.50 (hrs)
area (sf) 0.267
rainfall P (in) 3.700
storage (cy) 3994.031
diameter or depth (in) 7.000
time of conc. (hrs) 0.1300
time increment (hrs) 0.0200
Hydrograph 3
width for rect. (in) 0.000
time limit (hrs) 30.000
Routing Summary of Peaks: loo -Year SCS Method
coefficient o.600
invert (ft) 516.1oo
fudge factor 1.00
inflow (cfs) 71.641 at 11.92 (hrs)
multiple 1
routed true
!! discharge (cfs:) 53.26o at 12.04 (hrs)
_ discharge into riser
peak flow (cfs) 1g.866
i water level (ft) 520.891 at 12.04 (hrs)
9.100
peak time (hrs) 11.930
storage (cy) 4779.756
Outlet structure 1
volume (cy) 2212.928
EMERGEENCY SPILL WA Y
Weir
name: Riser
Hydrograph 2
time increment (hrs) o.o2oo
diameter (in) 48.000
SCS
FIGURE 3.01- la
-d I
name: SO -Year SCS Method
Homogeneous Embankments n/Seepuge Controls
MIN. REQUIRED FOREBA Y
VOLUME =4, 401 cf
FOREBA Y VOLUME
PROVIDED =5, 095cf
• 100 YEAR
W.S.E.= 520.89
3 0 YEAR
W. S.E. = 519.75
2 YEAR
MIN. REQUIRED WQV W. S.E. = 51813
(4x) =35, 204cf
WQV PROVIDED= 48,343cf
-3' WIDE FOREBAY TOP
OF DAM ELEV. = 516.10
L6
15' WIDE TOP OF DAM
ELEV. = 522'
WEIR ELEV.= 521.0
30' WIDE RIPRAP WEIR
OUTFALL CHANNEL W/
5.-1 SIDE SLOPES
MA ;X. EMBANKMEN T
NOTE:
5.9 OF
' THE SEDIMENT BASIN SHALL BE CONVERTED TO A
M. W. S. E.
PONDING tty� ,Rp -- 10 AQUATIC BENCH SWM TYPE III RETENTION BASIN IF CONSTRUCTION
516. 10' t;�ro'firrlv� ars-6.kx
N N DEPTH : a OF TOWNHOME PHASES III & IV IS DELAYED. SEE
,
ii ORIFICE COEFF.= 0.6k k,s °' y THIS SHEET & SWM -2 FOR DETAILS. THE FINAL SWM
PLAN AND MS -19 CALCULATIONS WILL BE PROVIDED
5' RIP- RAP
WITH THE AVINITY FINAL WPO SUBMITTAL.
BOTTOM OF LINED SPILLWAY, ,
FOREBAY ELEV. =514.0 48" RCP MOLT -STAGE RISER. MIN. 8 WIDE ® TOP & PROPOSED EW -1
ELEV. 510.0 19' DEEP IMPERVIOUS AND OUTLET RIPRAP
ONE �7 ORIFICE AT ELEV. 516. 10, 24" RCP BARREL CORE & CUTOFF AT 0% SLOPE
BOTTOM OF RETENTIO RISER TOP ELEV. AT 519.75' 85 LF ® 0.009' TRENCH WITH 1:1 SIDE 14'(W); 26'(L); 2'(D)
BASIN= 510.0
INV. IN= 506.00 SLOPES. SEE DETAIL ON
INV. OUT= 506.00' THIS SHEET FOR
ADDITIONAL INFORMATION.
1iETENTION BASIN
(NOT TO SCALE')
Homogeneou9 tilt
I
' \`,`- `,'° '4' mitt `
ut off trench-4' below suitable
i ' materioi (
suit or rack L .....•....., - - . _ -. J
TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
Deli or gravel
-Pipe outlet � .h
Coarse3 f201
Perforated collector oroun 's Blanket drain
Foundation drain
FOUNDATION DRAIN BLANKET DRAIN
ch" dWm
Sand, grmd or rack
outlet
Rack or gravel
-Rock too �fQ. drain
- a2sa �v
114Tr filter Transition fitter
CHIMNEY DRAIN TOE DRAIN
sl a ang a
coefficient
o.000
3.300
Area (acres)
8.$00
z
o
~'
invert (ft)
519.750
CN 81.000
Type 2
Consult with the erosion and sediment control inspector prior to beginning th <e conversion of the sediment basin to
multiple
1
rainfall, P (in)
5.600
cn
J
w
discharge
into riser
time of conc. (hrs)
0.1300
Uj
`G'
transition at (ft)
.1.458
time increment (hrs) 0.0200
U)
Uj
Uj
orifice coef.
0.600
time limit (hrs)
30.000
ce
orifice area (sf)
12.566
fudge factor
1.00
ATTENTION TO THE CREATION OF THE FOREBAY AND AQUATIC BENCH. THESE TWO FEATURES SHALL NOT BE INSTALLED
Outlet structure 2
routed
true
Culvert
peak flow (cfs)
37.369 i
' name: Barrel
peak time (hrs)
11.930
multiple
1
volume (cy)
4162.711
discharge
out of riser
Hydrograph 3
VSMH TECHNICAL BULLETIN #7.
D (in)
24.000
SCS
30' WIDE RIPRAP WEl
h (in)
0.000
name: loo -Year SCS Method
BASIN TOP OF DAM
Length (ft)
85.000
Area (acres)
8.800
ry
Slope
0.000
CN 81.000
Manning's n
0.013
Type 2
I
l
Inlet coeff. Ke
0.500
rainfall, P (in)
9.100
ll
Equation constant set 3
time of conc. (hrs)
0.1300
EMERGEENCY SPILL WA Y
Invert (ft)
5o6.000
time increment (hrs) o.o2oo
Outlet structure 3
time limit (hrs)
30.000
Weir
fudge factor
1.00
name: Emergency Spillway
routed
true
length (ft)
40.000
peak flow (cfs)
72.024
side angle
0.000
peak time (hrs)
'11.930
coefficient
3.300
volume (cy)
8023.047
invert (ft)
521.000
24... RCP BARREL
MIN. REQUIRED FOREBA Y
VOLUME =4, 401 cf
FOREBA Y VOLUME
PROVIDED =5, 095cf
• 100 YEAR
W.S.E.= 520.89
3 0 YEAR
W. S.E. = 519.75
2 YEAR
MIN. REQUIRED WQV W. S.E. = 51813
(4x) =35, 204cf
WQV PROVIDED= 48,343cf
-3' WIDE FOREBAY TOP
OF DAM ELEV. = 516.10
L6
15' WIDE TOP OF DAM
ELEV. = 522'
WEIR ELEV.= 521.0
30' WIDE RIPRAP WEIR
OUTFALL CHANNEL W/
5.-1 SIDE SLOPES
MA ;X. EMBANKMEN T
NOTE:
5.9 OF
' THE SEDIMENT BASIN SHALL BE CONVERTED TO A
M. W. S. E.
PONDING tty� ,Rp -- 10 AQUATIC BENCH SWM TYPE III RETENTION BASIN IF CONSTRUCTION
516. 10' t;�ro'firrlv� ars-6.kx
N N DEPTH : a OF TOWNHOME PHASES III & IV IS DELAYED. SEE
,
ii ORIFICE COEFF.= 0.6k k,s °' y THIS SHEET & SWM -2 FOR DETAILS. THE FINAL SWM
PLAN AND MS -19 CALCULATIONS WILL BE PROVIDED
5' RIP- RAP
WITH THE AVINITY FINAL WPO SUBMITTAL.
BOTTOM OF LINED SPILLWAY, ,
FOREBAY ELEV. =514.0 48" RCP MOLT -STAGE RISER. MIN. 8 WIDE ® TOP & PROPOSED EW -1
ELEV. 510.0 19' DEEP IMPERVIOUS AND OUTLET RIPRAP
ONE �7 ORIFICE AT ELEV. 516. 10, 24" RCP BARREL CORE & CUTOFF AT 0% SLOPE
BOTTOM OF RETENTIO RISER TOP ELEV. AT 519.75' 85 LF ® 0.009' TRENCH WITH 1:1 SIDE 14'(W); 26'(L); 2'(D)
BASIN= 510.0
INV. IN= 506.00 SLOPES. SEE DETAIL ON
INV. OUT= 506.00' THIS SHEET FOR
ADDITIONAL INFORMATION.
1iETENTION BASIN
(NOT TO SCALE')
Homogeneou9 tilt
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ut off trench-4' below suitable
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TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
Deli or gravel
-Pipe outlet � .h
Coarse3 f201
Perforated collector oroun 's Blanket drain
Foundation drain
FOUNDATION DRAIN BLANKET DRAIN
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Sand, grmd or rack
outlet
Rack or gravel
-Rock too �fQ. drain
- a2sa �v
114Tr filter Transition fitter
CHIMNEY DRAIN TOE DRAIN
- SCO T R. COLLINS'�
U No. 35791 �
O�,�SSI ONAL E���
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Procedure for Converting Wet Ponds:
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Consult with the erosion and sediment control inspector prior to beginning th <e conversion of the sediment basin to
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a wet pond to ensure that the timing is appropriate.
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-Pump down the sediment basin and use an approved dewatering measure.
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-Grade and roughen the bank of the pond to prepare it for seeding.
NOTE:
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IN ADDITION TO THE PROCEDURE FOR CONVERTING WET PONDS STATED ABOVE, THE CONTRACTOR SHOULD PAY SPECIAL
ATTENTION TO THE CREATION OF THE FOREBAY AND AQUATIC BENCH. THESE TWO FEATURES SHALL NOT BE INSTALLED
DURING THE EROSION AND SEDIMENT CONTROL PHASES WHEN THE FACILITY IS BEING UTILIZED AS A SEDIMENT BASIN. IT'S
ONLY WHEN THE SEDIMENT BASIN IS CONVERTED TO A RETENTION BASIN THAT -THE FOREBAY AND AQUATIC BENCH BE
INSTALLED. ADDITIONALLY, THE SEDIMENT BASIN RISER AND BARREL DESIGN SHOULD BE ,UTILIZED WHEN IT IS CONVERTED TO
A RETENTION BASIN. THE DESIGN ELEMENTS FOR THESE STRUCTURES DOES NOT CHANGE. THE DEWATERING ORIFICE SHALL
BE UTILIZED AS WELL ONCE THE SEDIMENT BASIN IS CONVERTED. THE HOLE DRILLED INTO THE RISER FOR THE DEWATERING
ORIFICE SHALL ACT AS THE PERMANENT ORIFICE FOR THE RETENTION BASIN. THE CONTRACTOR SHALL REMOVE ALL SEDIMENT
AND STRUCTURES ASSOCIATED WITH THE DEWATERING ORIFICE, AND COVER THE ORIFICE OPENING WITH A TRASH RACK PER
SPILLWAY CREST
TOP OFDA2
VSMH TECHNICAL BULLETIN #7.
ELEVATION= 521.0
30' WIDE RIPRAP WEl
0 W
BASIN TOP OF DAM
1TFSIDE SLOPES.
WIDTH= 15.0' AT AN
100 YEAR
ry
ELEVA TION= 522.0' W. S E. = 520.89
TOP OF FOREBAY DAM 10 YEAR TOP OF DAM
WIDTH= 3.0' AT AN W.S.E. = 519.75 WIDTH= 15' AT AN
2 YEAR 100-YEAR STORM EVENT
ELEVATION= 516.10' DOES INOT CREST THE ELEVA TION= 522.0
W. S. E. = 518.13
ll
10' AQUkI TlC BENCH
EMERGEENCY SPILL WA Y
1. 11 ' OF
48" RCP MUL T -STAGE RISER. ONE
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. FREEBOARD
07" ORIFICE AT ELEV 516. 10, RISER
DURING THE
TOP ELEV. AT 519.,75'
8.0 100- YR ,
STORM EVENT
2.10' (100 YR W.S.E.
ORIFICE COEFF. = 0.6
! =520.89)
TRASH RACKS SHALL BE
24... RCP BARREL
30.0'
WEIR COEFF. = 3.3
INSTALLED ON ALL N
ORIFICES PER VSMH
85 LF ® 0.007
5.0'
WEIR COEFF.= 3.3
TECHNICAL BULLE77N #7
dl
INV! lN= 506.00
INV. OUT= 506.00'
EMERGENCY SPILLWAY
t
e FOREBA Y SPILL WA Y ELEVATION= 521.0 RIPRAP LINED
ELEVATION= 514.0 RIP -RAP LINED SPILL WA Y
SPILLWAY
RISER FOOTING
FOREBAYSPILLWAY EMERGE�NCYSPILLWAY
PRINCIPLE SPILLWAY
NTS NITS
NOT TO SCALE
- SCO T R. COLLINS'�
U No. 35791 �
O�,�SSI ONAL E���
Water Quality Volume Requirements: Elevation Area of Forebay Volume Elevation (ft) Area of Wet Pond Volume (co
WET POND REQUIREMENTS: (ft) Contours (sf) (cf) Contours (sf)
Minimum Forebay Volume= 0.25 inches per impervious square acre
Forebay Depth to range from 4' -6' 510 11 0 510 5030 0
Impervious Area= 211225 sf 512 444 350 512 6708 11,698 w
Minimum Forebay Voturne= 4401 cf 514 1149 1,888 514 8795 27,154 0
515 1594 3,254 515 9982 36,536
Minimum Water Quality Volume Calculations: 516 2100 5,095 515 -13732 48,343
ImperviousArea= 211225 sf 518 - 5,095 518 '16097 78,141
Water Quality Volume 8801 cf 520 - 5,095 520 18195 112,412
Water Quality Volume Required (WQV x4)= 35204 cf 522 - 5,095 522 20422 151,007
DO STD. EC-4," CL.
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RIPE RAP
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(24" RCP
BARREL - o o _ o L
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FORE`DAY TOP 4x RE D_- 35,204cf
OF-DAM ELEV.'= WATER QUALITY VOLUME' a-
/ 516.10 PRQVIDED= 48, 343c f o
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�REfAY L E 519.75'
1 ® W
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VOLUME 7 iORIFICE °
EL1RV. = 516.10 ! (�
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-. PRO TIDE= 5,095cf \ \�',
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BENCH
FOR SPILLWAY WEIR w/ \ 000 6 o
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RIP - R AP ' } ! 1 092033
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SHEET NO. a o
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Water Quality Volume Requirements: Elevation Area of Forebay Volume Elevation (ft) Area of Wet Pond Volume (co
WET POND REQUIREMENTS: (ft) Contours (sf) (cf) Contours (sf)
Minimum Forebay Volume= 0.25 inches per impervious square acre
Forebay Depth to range from 4' -6' 510 11 0 510 5030 0
Impervious Area= 211225 sf 512 444 350 512 6708 11,698 w
Minimum Forebay Voturne= 4401 cf 514 1149 1,888 514 8795 27,154 0
515 1594 3,254 515 9982 36,536
Minimum Water Quality Volume Calculations: 516 2100 5,095 515 -13732 48,343
ImperviousArea= 211225 sf 518 - 5,095 518 '16097 78,141
Water Quality Volume 8801 cf 520 - 5,095 520 18195 112,412
Water Quality Volume Required (WQV x4)= 35204 cf 522 - 5,095 522 20422 151,007
DO STD. EC-4," CL.
II, TYPE" B
RIPE RAP
C13 - M
/ L- 2�- ',W- 10',D -2l') /
//
/ // / L
1 \ 0
C °-
/ % T
(24" RCP
BARREL - o o _ o L
/ I1y. WATER QUA,L�ITY VOLE ( z
FORE`DAY TOP 4x RE D_- 35,204cf
OF-DAM ELEV.'= WATER QUALITY VOLUME' a-
/ 516.10 PRQVIDED= 48, 343c f o
\ A D OU LE R WRAP w
2:11 T % LOPE\ ` (�j z �' z
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F REBAY 7� \\ W W °
t 515 10
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+48" RCP RISE -` � �
�REfAY L E 519.75'
1 ® W
f ELEV.
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VOLUME 7 iORIFICE °
EL1RV. = 516.10 ! (�
--
-. PRO TIDE= 5,095cf \ \�',
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>0' AQUATIC` - 3q' E11iERGENCY O �,
BENCH
FOR SPILLWAY WEIR w/ \ 000 6 o
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30'(V)x2 (D)x1 "(L)
. ; 521
LEV.0
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TYPE B 1 ' t
RIP - R AP ' } ! 1 092033
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SCALE
AS SHOWN .�
SHEET NO. a o
X SWM-2
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