HomeMy WebLinkAboutWPO201900056 Plan - E&S Erosion Control Plan 2019-09-17SITE DATA
OWNER / DEVEL OPER:
PROPERTYADDRESS:
PLAN PREPARER:
TAX MAP PARCEL No:
LOT AREA:
ZONING:
USE:
BUILDING HEIGHT.:
SETBACKS.
YANCEY, CHARLES ERNEST
6557 DICK WOODS ROAD
CHARLOTTESVILLE VA, 22903
6557 DICK WOODS ROAD
CHA RL 0 TTES VIL L E VA, 22903
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ROUDABUSH, GALE, & ASSOCIATES 1111111111111F M P 71 1 B
914 MONTICELLO ROAD
CHARLOTTESVILLE, VA. 22902
(434)-977-0205
07100-00-00-021 BO
73.94 AC.
RURAL AREAS DISTRICT (RA) l7F4nqlnN rlKlTPnl P1 Aki
MAXIMUM STRUCTURE HEIGHT IS 35 FEET
FRONT SIDE REAR
75' 25' 35'
PROPOSED IMPERVIOUS AREA: 0.0 AC.
PROPOSED TURF AREA: O.0 AC.
PROPOSED OPEN SPACE AREA: 4.49AC (PASTURE)
MAGISTERIAL DISTRICT. SAMUEL MILLER
DRAINAGEDISTRICT: MECHUMS RIVER - STOCKTON CREEK, HUC JR01
BOUNDARY.• DB. 5131566
TOPOGRAPHY.- ALBEMARLE COUNTY GIS
CRITICAL SLOPES: CRITICAL SLOPES EXIST ON THIS SITE & ARE LOCATED
AS SHOWN.
FLOODPLAIN: THE SUBJECT PROPERTY IS IN FLOOD HAZARD ZONE X (AREA
OF MINIMAL FLOOD HAZARD
STORMWA TER MANAGEMENT. THE PROPOSED LAND DISTURBANCE IS
UNDERSTOODTO BE EXEMPT FROM THE VIRGINIA
STORMWA TER MANAGEMENT PLAN REQUIRMENTS
UNDER ALBEMARLE COUNTY CODE OF ORDINANCES
17-303-B AS AN AGRICUL TURAL ENGINEERING OPERATION
THE STREAM BUFFER(S) SHOWN HEREON SHALL BE MANAGED IN ACCORDANCE WITH THE
ALBEMARLE COUNTY WATER PROTECTION ORDINANCE.
THIS SITE IS NOT LOCATED WITHIN THE WATERSHED OF PUBLIC WATER SUPPL Y RESERVOIR.
WORK AREA PROTECTION & MAINTENANCE
1. ALL FENCES REQUIRED TO BE REMOVED OR DISTURBED BY CONSTRUCTION SHALL BE SALVAGED„ STORED,
PROTECTED AND RE —INSTALLED BY CONTRACTOR AT THE DIRECTION OF AND LOCATION DESIGNATED BY THE
PROJECT MANAGER. IF SUCH FENCE MATERIAL CANNOT BE REUSED DUE TO DAMAGE CAUSED BY
CONTRACTOR, CONTRACTOR SHALL INSTALL NEW FENCE OF THE SAME TYPE OF MATERIAL. TEMPORARY
FENCING REQUIRED BY PRIVATE PROPERTY OWNERS SHALL BE PROVIDED BY CONTRACTOR. CONTRACTOR IS
ADVISED TO CONTACT PROPERTY OWNERS AT LEAST FORTY—EIGHT (48) HOURS IN ADVANCE OF (REMOVING
ANY FENCE IN ORDER TO COORDINATE RELOCATION AND/OR PROTECTION OF ANY ANIMALS, AND TO
ESTABLISH AND CONFIRM WITH THE OWNER THE PRE —CONSTRUCTION CONDITION OF ANY FENCE TO BE
REMOVED, DISTURBED OR REPLACED.
2. CONTRACTOR IS PERMITTED TO WORK IN THE PUBLIC RIGHT—OF—WAY (FOLLOWING ISSUANCE OF VDOT
APPROVAL) AND ANY TEMPORARY OR PERMANENT EASEMENT (FOLLOWING VERIFICATION OF EXISTENCE OF
EASEMENT) SHOWN ON THE PLANS. HOWEVER, CONTRACTOR SHALL NOTIFY PROPERTY OWNER(S)
FORTY—EIGHT (48) HOURS PRIOR TO WORKING ON ANY PRIVATE PROPERTY TO GAIN AND COORDINATE
ACCESS AND TO DETERMINE A STORAGE AREA FOR MATERIALS IF NEEDED. COORDINATION OF ACCESS TO
PUBLIC RIGHT—OF—WAY AND STORAGE OF MATERIALS THEREON SHALL BE COORDINATED WITH VDOT AND
THE PROJECT MANAGER. CONTRACTOR'S FAILURE TO SO NOTIFY AND COORDINATE WITH PROPERTY OWNERS
AND/OR THE PROJECT MANAGER MAY RESULT IN DELAYS.
3. CONTRACTOR SHALL, AT HIS EXPENSE, MAINTAIN THE WORK SITE IN A CLEAN AND ORDERLY APPEARANCE
AT ALL TIMES. ALL DEBRIS AND SURPLUS MATERIAL COLLECTED SHALL BE DISPOSED OF OFF THE WORK
SITE BY CONTRACTOR, AT HIS EXPENSE.
4. EXISTING LAWNS, TREES, SHRUBS, FENCES, UTILITIES, CULVERTS, WALLS, WALKS, DRIVEWAYS, POLES, SIGNS,
RIGHT—OF—WAY MONUMENTS, MAILBOXES AND THE LIKE SHALL BE PROTECTED FROM DAMAGE DURING THE
WORK. ANY DAMAGE CAUSED TO SUCH ITEMS SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO
ADDITIONAL COST. PROPERTY PINS DISTURBED BY CONTRACTOR THAT ARE NOT SHOWN ON THE PLANS TO
BE DISTURBED SHALL BE RESTORED BY A LICENSED SURVEYOR AT CONTRACTOR'S EXPENSE.
5. CONTRACTOR SHALL EMPLOY EROSION CONTROL DEVICES AND METHODS AS REQUIRED TO MEET 7HE
REQUIREMENTS AND INTENT OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE
THE NECESSARY DIVERSION DITCHES, DIKES OR TEMPORARY CULVERTS REQUIRED TO PREVENT MIUD AND
DEBRIS FROM BEING WASHED ONTO THE STREETS OR PROPERTY. CONTRACTOR'S VEHICLES SHALL BE KEPT
CLEAN TO PREVENT MUD OR DUST FROM BEING DEPOSITED ON STREETS. NO AREA SHALL BE LEFT
DENUDED FOR MORE THAN SEVEN (7) CALENDAR DAYS.
VEGETATION
1. PRIOR TO REMOVING ANY VEGETATION, CONTRACTOR SHALL MEET WITH THE PROPERTY OWNERS AND THE
PROJECT MANAGER TO REVIEW THE LIMITS OF CONSTRUCTION AND OBTAIN PERMISSION TO REMOb/E
VEGETATION REQUIRED TO DO THE WORK.
2. TREE AND PLANT ROOTS OR BRANCHES THAT MAY INTERFERE WITH THE WORK SHALL BE TRIMMED OR CUT
ONLY WITH THE APPROVAL OF THE PROJECT MANAGER. ANY TREES OR PLANTS WHICH ARE SHOWN TO
REMAIN THAT DO NOT INTERFERE WITH THE WORK, BUT ARE DAMAGED BY CONTRACTOR OR HIS
SUBCONTRACTORS, SHALL BE REPAIRED OR REPLACED BY CONTRACTOR AT NO ADDITIONAL COST.
3. CONTRACTOR SHALL CLEAN UP, RESTORE, SEED AND MAINTAIN ALL DISTURBED AREAS IMMEDIATELY UPON
COMPLETION OF WORK ON EACH SITE. TOPSOIL, SEED, FERTILIZER AND MULCH SHALL BE PLACED IN
ACCORDANCE WITH ESC AUTHORITY STANDARDS ON ALL DISTURBED AREAS. A PERMANENT STAND OF GRASS
ADEQUATE TO PREVENT EROSION SHALL BE ESTABLISHED PRIOR TO FINAL ACCEPTANCE.
4. THE ACT OF RESEEDING SHALL NOT QUALIFY AS "STABILIZED". THE CONTRACTOR SHALL BE RESPONSIBLE
TO ESTABLISH VEGETATION, NOT SIMPLY APPLY SEED AND MATERIALS.
14
,
SCALE: 1 "=2000 FEET
UTILITIES
1. ANY DAMAGE TO EXISTING UTILITIES CAUSED BY CONTRACTOR OR ITS SUBCONTRACTORS SHALL BE
CONTRACTOR'S SOLE RESPONSIBILITY AND REPAIRED AT CONTRACTOR'S EXPENSE.
2. THESE PLANS DO NOT GUARANTEE THE EXISTENCE, NON—EXISTENCE OR LOCATION OF UTILITIES.
CONTRACTOR SHALL VERIFY THE EXISTENCE AND LOCATION OR THE NON—EXISTENCE OF UTILITIES. AT
LEAST 48 HOURS PRIOR TO ANY EXCAVATION OR CONSTRUCTION, CONTRACTOR SHALL NOTIFY MISS UTILITY
(1-800-552-7001) AND/OR THE RESPECTIVE UTILITY COMPANIES FOR GAS, WATER, SEWER, POWER,
PHONE AND CABLE. CONTRACTOR SHALL TIMELY ARRANGE TO HAVE THE VARIOUS UTILITIES LOCATED, AND
TO HAVE THEM REMOVED OR RELOCATED, OR TO DETERMINE THE METHOD OF PROTECTION ACCEPTABLE TO
THE RESPECTIVE OWNER, IF THE METHOD OF PROTECTION IS NOT OTHERWISE SPECIFIED. CONTRACTOR
SHALL CONDUCT ITS WORK IN THE VICINITY OF EXISTING UTILITIES IN ACCORDANCE WITH THE RESPECTIVE
UTILITY'S RULES AND REGULATIONS. ANY COST INCURRED FOR REMOVING, RELOCATING OR PROTECTING
UTILITIES SHALL BE BORNE BY CONTRACTOR UNLESS INDICATED OTHERWISE. CONTRACTOR SHALL EXCAVATE
TO LOCATE BURIED UTILITIES FAR ENOUGH IN ADVANCE OF ITS WORK TO ALLOW FOR HORIZONTAL AND
/OR VERTICAL ADJUSTMENTS TO ITS WORK AND/OR THE UTILITIES. NO ADJUSTMENT IN COMPENSATION OR
SCHEDULE WILL BE ALLOWED FOR DELAYS RESULTING FROM CONTRACTOR'S FAILURE TO CONTACT AND
COORDINATE WITH UTILITIES.
3. WHEN THE WORK CROSSES EXISTING UTILITIES, THE EXISTING UTILITIES SHALL BE ADEQUATELY SUPPORTED
AND PROTECTED FROM DAMAGE DUE TO THE WORK. ALL METHODS FOR SUPPORTING AND MAINTAINING THE
EXISTING UTILITIES SHALL BE APPROVED BY THE RESPECTIVE UTILITY COMPANY AND/OR THE ENGINEER.
CONTRACTOR SHALL EXERCISE CARE TO INSURE THAT THE GRADE AND ALIGNMENT OF EXISTING UTILITIES
ARE MAINTAINED AND THAT NO JOINTS OR CONNECTIONS ARE DISPLACED. BACKFILL SHALL BE CAREFULLY
PLACED AND COMPACTED TO PREVENT FUTURE DAMAGE OR SETTLEMENT TO EXISTING UTILITIES. ANY
UTILITIES REMOVED AS PART OF THE WORK, AND NOT INDICATED TO BE REMOVED OR ABANDONED, SHALL
BE RESTORED USING MATERIALS AND INSTALLATION EQUAL TO THE UTILITY'S STANDARDS.
4. CONTRACTOR SHALL NOTIFY LANDOWNERS, TENANTS AND THE PROJECT MANAGER PRIOR TO THE
INTERRUPTION OF ANY SERVICES. SERVICE INTERRUPTIONS SHALL BE KEPT TO A MINIMUM AND SHALL
ONLY OCCUR WITH THE KNOWLEDGE AND PERMISSION OF THE SERVICE'S OWNER OR AUTHORITY.
5. THE ADJUSTMENT OF ALL MANHOLE TOPS, WATER VALVE BOXES, GAS VALVE BOXES AND WATER METER
BOXES SHALL BE THE RESPONSIBILITY OF CONTRACTOR.
6. ALL WATER METER, VALVES AND FIRE HYDRANT ADJUSTMENTS/RELOCATIONS SHALL BE PERFORMED BY THE
CONTRACTOR. CONTRACTOR SHALL KEEP A "REDLINE" SET OF PLANS DOCUMENTING ALL SUCH AS —BUILT
REVISIONS.
COVERSHEET 1
CONDITIONS/SHEET 2 EXISTING
SHEET 3 EROSION CONTROL PLAN
SHEET 4 EROSION CONTROL A
EROSIONSHEET 5 • : DETAILS
CONTRACTOR SHALL KEEP ACCURATE RECORDS OF ANY CHANGES SUBSTITUTIONS,
ALTERATIONS, VARIATIONS OR UNUSUAL CONDITIONS ENCOUNTERED OR IMPLEMENTED WHILE
ENGAGED ON THIS PROJECT. THESE RECORDS SHALL BE IN THE FORM OF "REDLINES".
"REDLINES" SHALL REFER TO THE CONTRACTOR'S HAND ANNOTATIONS USING RED COLORED
PEN/PENCIL TO DEPICT ACTUAL CHANGE, SUBSTITUTION, OR CONDITION.
PRIOR TO CONTRACTOR REQUESTING PARTIAL OR FULL PAYMENT, CONTRACTOR SHALL
PROVIDE THE OWNER WITH AN UP-TO-DATE CONTRACTOR'S RECORD DRAWING.
SPECIFICALLY, THIS SET OF PLANS, ISSUED TO THE CONTRACTOR AS FINAL CONSTRUCTION
DRAWINGS, SHALL BEAR THE "REDLINE" MARKINGS LISTED BELOW AS WELL AS THE
CONTRACTOR (AGENT OR SUPERINTENDENT) SIGNATURE AND CERTIFICATION BELOW:
• REDLINES SHOULD ALWAYS BE ACCURATE NEAT, LEGIBLE, DATED AND REASONABLY
SCALED
• ADD LARGE RED LETTERS TO TITLE SHEET WITH 'CONTRACTOR'S RECORD DRAWING'
INCLUDING CONTRACTOR'S NAME, DATE, AND OTHER RELEVANT INFORMATION
• CONTRACTOR'S REPRESENTATIVE OR SUPERINTENDENT SHALL INITIAL EACH SHEET. IF A
SHEET HAS NOT BEEN CHANGED AT ALL OR NO MARK HAS BEEN ADDED, LABEL THE
SHEET ONLY 'NO CHANGES'
• IF A SHEET HAS BEEN CHANGED OR MODIFICATIONS HAVE BEEN ADDED, LABEL IT
'REVISED'
• USE WRITTEN EXPLANATION TO DESCRIBE CHANGES. REFER TO SPECIFIC ACTIONS
INSTEAD OF REFERENCING CHANGE ORDER NUMBERS OR RELATED DOCUMENTS
• USE CLEAR LETTERING
• NEVER REMOVE OLD VALUES OR DETAILS, JUST REDLINE OR "X" THROUGH THEM. IF
THERE IS NO ROOM FOR THE NEW VALUE, YOU CAN GO TO THE SIDE AND REDLINE
THE REPLACEMENT VALUE.
• PROVIDE THE REDLINE DETAILS OF CHANGES OR ADDITIONAL INFORMATION, INCLUDING
BUT NOT LIMITED TO FABRICATION, ERECTION, INSTALLATION, LOCATION, SIZING, MATERIAL,
DIMENSION, ADDITIONS, RELOCATIONS, SUBSTITUTIONS, ETC
• BE SPECIFIC WHEN MAKING NOTES TO UNDERGROUND UTILITIES, SHOWING EXACT
LOCATION, DEPTH, AND MATERIAL USED (EXAMPLE: SEWER LATERALS)
• PROVIDE ALL NECESSARY INFORMATION OF CONTRACTOR'S DESIGNED SYSTEMS OR
SUBSTITUTIONS
• CROSS OUT ANY PLAN REFERENCE TO "APPROVED EQUAL" AND REPLACE WITH ANY
SPECIFIC INFORMATION OF VARIANCE USED DURING THE CONSTRUCTION PROCESS
• ANY CHANGES IN INVERT ELEVATIONS, GRADE MODIFICATIONS, SLOPES, AND RELATED
INFORMATION ON PIPING UTILITIES, EARTHWORK, ETC. SHALL BE REDLINED.
• RECORD ALL UNEXPECTED OBSTRUCTIONS, COMPLICATING FACTORS, UNSUITABLE
CONDITIONS FOUND IN THE PROJECT AREA INCLUDING ROCK, UNUSUAL TOPSOIL
CONDITIONS, BURIED DEBRIS, ETC.
• ATTACH OR INCLUDE ANY SHOW DRAWINGS OR SUPPLEMENTAL INFORMATION TO THE
CONTRACTOR'S RECORD DRAWING
• CHANGES MADE AS A RESULT OF ANY REGULATORY OR OWNER INSPECTION PROCESS
CERTIFICATION STATEMENT:
THIS HAND -MARKED SET OF DRAWINGS HAS BEEN "REDLINED" TO PROVIDE ACCURATE
DETAILED RECORD OF ANY SUBSTANTIVE CHANGES TO THE APPROVED DESIGN DRAWINGS.
ANY ITEM NOT "REDLINED" ON THIS PLAN SET OR SUBSEQUENT PAGES SHOULD BE
CONSIDERED TO BE "CONSTRUCTED IN ACCORDANCE WITH THE DESIGN AS SHOWN".
NAME
TITLE
DATE
(CONTRACTOR)
APPROVED
by the Albemarle County
Comrri ky Dueye ►nent Department
Date
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JIMMY L. TAGGART
Lic. No.
22841
09-23-19
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DATE:
09-17-2019
SCALE:
AS SHOWN
JOB#: 19.1164
CONTOUR INTERVAL:4 FT
SHEET:
2 OF 5
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LIMITS ❑F LAND
STAGING � �
�• DISTURBANCE
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DRAINAGE
AREA TO ST-2
=2,35AC
(DF
OD
_-,SEDIMENT
TRAP 2
TEMPORARY SEDIMENT TRAP 1 CALCULATIONS
Drainage Area= 2.15 acres
STAGE -STORAGE REPORT
ELEV(FT) STORAGE(CF)
STORAGE(CY)
AREA(SF)
Design Volumes:
649 0
0
1026
Wet Storage-
650 1102
41
1178
Minimum Volume Req'd. = 67 cy * 2.15 acres = 144 cy
651 2361
87
1340
Available Basin Volume Prov'd. = 200 cy @ 653.00
Dry Storage-
652 3787
140
1512
Minimum Volume Req'd. = 67 cy * 2.15 acres = 144 cy
653 5390
200
1695
Available Basin Volume Prov'd. = 155 cy @ 655.00
654 7284
270
2092
Design Elevations:
655 9595
355
2530
Design Dimsenions:
Top of Berm = 656.00
Berm Width = 3'
Dam Length: 85,
Weir Elev = 655.00
Base Dimension: 47X47X50(Long Side
Weir Width = 14'
at Dam)
Floor Elev = 649.00
Wet Storage Bank Slope:
1:1
Sediment Cleanout Elev = 651.00
Dry Storage Bank Slope:
2:1
TEMPORARY SEDIMENT TRAP
2 CALCULATIONS
Drainage Area= 2.35 acres
STAGE -STORAGE REPORT
ELEV(FT) STORAGE(CF) STORAGE(CY)
AREA(SF)
Design Volumes:
678 0 0
1221
Wet Storage-
679 1259 48
1386
Minimum Volume Req'd. = 67 cy * 2.35 acres = 157 cy
680 1426 103
1561
Available Basin Volume Prov'd. = 164 cy @ 683.00
Dry Storage -
681 1802 164
1747
Minimum Volume Req'd. = 67 cy * 2.35 acres = 157 cy
682 2311 236
2150
Available Basin Volume Prov'd. = 160 cy @ 681.00
683 2770 324
2549
Design Elevations:
Design Dimsenions:
Top of Berm = 684.00
Dam Length: 90'
Berm Width = 3'
Base Dimension: 50X50X54(Long Side
Weir Elev = 683.00
at Dam)
Weir Width = 15'
Wet Storage Bank Slope: 1:1
Floor Elev = 678.00
Dry Storage Bank Slope: 2:1
Sediment Cleanout Elev = 679.50
NOTEI GRADING OPERATIONS TO BE COMPLETED IN 2 PHASES,
PHASE ONE MUST BE COMPLETE AND STABILIZED WITH PERMANENT
STABILIZATION MEASURES BEFORE ANY DISTURBANCE OCCURS
UTTUTAI PI..lACC- a
EROSION & SEDIMENT CONTROL LEGEND
C E 3,02 o CONSTRUCTION ENTRANCE S T 3,13 S T SEDIMENT TRAP
S 3,05 X v v SILT FENCE T S 3,31 T S TEMPORARY SEEDING
TEMPORARY
PPPD D 3,09 DIVERSI❑N P S 3,32 PS PERMANENT SEEDING
DIKE
D C 3,39 DC DUST CONTROL
TOTAL DISTURBED AREA = 4.49 ACRES
SCALE 1 "=40'
80 0 40 80
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JIMMY L.
TAGGART
Lic. No.
22841
°� 09-23-19
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DATE 09-17-2019
SCALE\AS SHOWN
JOB#:
!19.1164
CONTOUR INTERVAL:4 Ft
SHEET: 3 OF 5
EROSION AND SEDIMENT CONTROL NARRATIVE
PRIOR TO CONSTRUCTION
1. OWNER SHALL POST SURETY BONDS FOR CONSTRUCTION, EROSION &
SEDIMENT CONTROL.
2. CONTRACTOR SHALL OBTAIN PERMITS TO WORK WITHIN STATE
RIGHT-OF-WAY (VDOT LAND -USE PERMIT). BONDING FOR WORK
WITHIN THE VDOT RIGHT-OF-WAY MAY BE REQUIRED TO OBTAIN
THE PERMIT.
3. CONTRACTOR SHALL COORDINATE WITH OWNER TO OBTAIN VSMP
PERMITS, AS REQUIRED BY THE STATE DEPARTMENT OF
ENVIRONMENTAL QUALITY (DEQ).
4. CONTRACTOR SHALL OBTAIN LAND DISTURBANCE PERMIT FROM THE
COUNTY OF ALBEMARLE PRIOR TO BEGINNING CONSTRUCTION.
5. A PRE -CONSTRUCTION MEETING WITH THE ENGINEER, THE CERTIFIED
LAND DISTURBER, AND THE ENVIRONMENTAL INSPECTOR MAY ALSO
BE REQUIRED. ALLOW 72 HOURS FOR COORDINATION AND
SCHEDULING OF PRE -CONSTRUCTION MEETING.
6. AREA OF FOREST/OPEN SPACE SHALL BE DEMARCATED
(FENCED -OFF) PRIOR TO ANY LAND DISTURBING ACTIVITIES.
PROJECT DESCRIPTION
THIS PROJECT PROPOSES TO GRADE TWO AREAS OF PASTURE ON
AGRICULTURAL LAND TO PROVIDE EASE OF ACCESS FOR LIVESTOCK AND
EQUIPMENT. FOLLOWING GRADING OPERATIONS, THE LAND WILL BE SEEDED
AND ALLOWED TO RETURN TO PASTURE.
EXISTING SITE CONDITIONS
THIS LOT CONSISTS OF APPROXIMATELY 73.94 ACRES OF VACANT GENTLE
TO STEEPLY SLOPING AGRICULTURAL PASTURE LAND THAT DRAINS TO AN
EXISTING CREEK AND POND IN THE CENTER OF THE PROPERTY. A CREEK
FLOWS FROM THE POND IN A NORTHERN DIRECTION THROUGH THE
PROPERTY.
ADJACENT AREA
THE RESIDENTIAL LOT IS BOUND BY ADJACENT AGRICULTURAL LAND AND
SINGLE FAMILY RESIDENTIAL PROPERTY. THE PARCEL IS FRONTED TO THE
SOUTH BY STATE ROUTE 637 (DICK WOODS ROAD). THERE IS AN EXISTING
CREEK ON THE NORTHERN BORDER OF THE PROPERTY.
OFF -SITE AREAS
ANY EXCESS MATERIAL GENERATED AS PART OF THIS PROJECT SHALL BE
STORED OR SPREAD WITHIN THE APPROVED LAND DISTURBANCE AREA OR
IN AN AREA APPROVED BY THE COUNTY OF ALBEMARLE COMMUNITY
DEVELOPMENT DEPARTMENT. ANY FILL BROUGHT FROM OFF -SITE SHALL BE
VISIBLY INSPECTED BY THE CONTRACTOR TO ENSURE THE FILL IS CLEAN
AND FREE FROM CONTAMINATION.
SOILS
4D-ASHE LOAM 15 TO 25 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B. SOMEWHAT STEEP SLOPING AND SOMEWHAT
EXCESSIVELY DRAINED, STARTING AT SURFACE LAYER TO SUBSTRATUM,
SOIL LAYERS CONSIST OF LOAM, SANDY LOAM, AND BEDROCK,
PERMEABILITY IS VERY LOW TO HIGH WHILE AVAILABLE WATER CAPACITY IS
LOW, SURFACE RUNOFF IS MEDIUM, HAZARD OF EROSION IS MODERATE.
368-HAYESVILLE LOAM 2 TO 7 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B, GRADUAL SLOPING AND WELL DRAINED,
STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSISTS OF
LOAM, CLAY, SANDY CLAY LOAM, AND FINE SANDY CLAY LOAM,
PERMEABILITY IS MODERATELY HIGH TO HIGH WHILE AVAILABLE WATER
CAPACITY IS HIGH, SURFACE RUNOFF IS MEDIUM, HAZARD OF EROSION IS
SLIGHT.
36C-HAYESVILLE LOAM 7 TO 15 PERCENT
HYDROLOGIC SOIL GROUP B, MODERATE SLOPING, STARTING AT SURFACE
LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM, CLAY, SANDY
CLAY LOAM, AND FINE SANDY LOAM, PERMEABILITY IS MODERATELY HIGH
TO HIGH WHILE AVAILABLE WATER CAPACITY IS HIGH, SURFACE RUNOFF IS
MEDIUM, HAZARD OF EROSION IS SLIGHT.
66E-PARKER VERY STONY LOAM 25 TO 45 PERCENT SLOPES
HYDROLOGIC SOIL GROUP A, STEEPLY SLOPING AND EXCESSIVELY DRAINED,
STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF
EXTREMELY STONY LOAM, EXTREMELY COBBLY LOAM, STONY SANDY LOAM,
BEDROCK, PERMEABILITY IS MODERATELY HIGH TO HIGH WHILE AVAILABLE
WATER CAPACITY IS LOW, SURFACE RUNOFF IS MEDIUM.
19C-MEADOWVILLE LOAM 2 TO 7 PERCENT SLOPES
HYDROLOGIC SOIL GROUP A, GRADUAL SLOPING AND WELL DRAINED,
STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF
LOAM, PERMEABILITY IS MODERATELY HIGH TO HIGH WHILE AVAILABLE
WATER CAPACITY IS HIGH, SURFACE RUNOFF IS LOW, HAZARD OF EROSION
IS SLIGHT.
CRITICAL SLOPES
CRITICAL SLOPES EXIST AS SHOWN ON THIS PLAN
STRUCTURAL PRACTICES
1. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - A TEMPORARY
CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT THE ENTRANCE TO
THE LIMITS OF DISTURBANCE AS SHOWN ON THE EROSION AND
SEDIMENT CONTROL PLAN.
2. SILT FENCE BARRIER (3.05) - SILT FENCE BARRIERS WILL BE
INSTALLED TO FILTER RUNOFF FROM SHEET FLOW AS INDICATED
ON THE EROSION AND SEDIMENT CONTROL PLAN.
3. DIVERSION (3.12) - A DIVERSION CHANNEL TO DIRECT THE FLOW OF
STORM RUNOFF INTO THE SEDIMENT TRAPS WILL BE INSTALLED AS
SHOWN ON THE EROSION AND SEDIMENT CONTROL PLAN.
4. TEMPORARY SEDIMENT TRAP (3.13) - A TEMPORARY SEDIMENT TRAP IS TO
BE CONSTRUCTED IN CONJUNCTION WITH CULVERT INLET PROTECTION.
CALCULATIONS FOR THE SEDIMENT TRAP ARE SHOWN ON THE
EROSION AND SEDIMENT PLAN SHEET.
VEGETATIVE PRACTICES
1. SURFACE ROUGHENING (3.29) - ALL AREAS WITH A GRADE STEEPER
THAN 3:1 SHALL BE STAIR -STEP GRADED OR GROOVED (PLATE
3,29-4) TO AID IN GRASS ESTABLISHMENT, INCREASE
INFILTRATION, AND TO SLOW RUNOFF VELOCITIES.
2. TOPSOILING & STOCKPILING (3.30) - TOPSOIL WILL BE STRIPPED
FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE.
STOCKPILES ARE TO BE STABILIZED WITH TEMPORARY VEGETATION
OR TO HAVE SILT FENCE INSTALLED ALONG THE LOWER
PERIMETER TO PROTECT DOWNSTREAM AREAS.
3. TEMPORARY SEEDING (3.31) - AREAS NOT BROUGHT TO FINAL GRADE
FOR A PERIOD OF MORE THAN 14 DAYS SHALL BE STABILIZED
WITH A TEMPORARY SEED MIXTURE ACCEPTABLE FOR THAT TIME
OF YEAR. CRIMPING, PUNCH ROLLER -TYPE ROLLERS, OR TRACK
WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO
THE SOIL ON SLOPES IF STRAW IS TO BE USED.
4. PERMANENT SEEDING (3.32) - AREAS BROUGHT TO FINAL GRADE OR
THOSE CONSTRUCTION AREAS THAT WILL REMAIN DORMANT FOR
YEAR OR MORE SHALL BE STABILIZED WITH A PERMANENT SEED
MIXTURE ACCEPTABLE TO THAT TIME OF YEAR. PREPARE SURFACE
WITH APPROVED TREATMENT AND ADDITIVES PRIOR TO APPLYING
SEED.
5. MULCH (3.35) - PLANT RESIDUES OR OTHER SUITABLE MATERIALS
SHALL BE APPLIED TO DISTURBED SURFACES TO PREVENT
EROSION AND REDUCE OVERLAND FLOW VELOCITIES. THIS
PRACTICE SHOULD BE APPLIED TO ALL SEEDING OPERATIONS,
OTHER PLANTER MATERIALS WHICH DO NOT PROVIDE ADEQUATE
SOIL PROTECTION BY THEMSELVES, AND BARE AREAS WHICH
CANNOT BE SEEDED DUE TO THE SEASON BUT WHICH STILL
NEED PROTECTION TO PREVENT SOIL LOSS. CRIMPING, PUNCH
ROLLER -TYPE ROLLERS, OR TRACK WALKING MAY BE USED TO
INCORPORATE STRAW MULCH INTO THE SOIL ON SLOPES IF
STRAW IS TO BE USED.
6. DUST CONTROL (3.29) - DUST CONTROL METHODS MUST BE USED TO
REDUCE THE AMOUNT OF AIRBORNE DUST DURING ALL PHASES
OF CONSTRUCTION WHERE SOIL IS EXPOSED OR DISTURBED.
MANAGEMENT STRATEGIES
1. CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING
OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE.
2. THE CONSTRUCTION ENTRANCE AND PERIMETER EROSION
CONTROL MEASURES SUCH SILT FENCE SHALL BE INSTALLED AS
THE FIRST STEP OF DISTURBANCE.
3. THE SEDIMENT TRAP MEASURE SHALL BE INSTALLED WITH
PERIMETER SILT FENCE PRIOR TO ANY GRADING AND SHALL BE
SEEDED AND MULCHED IMMEDIATELY FOLLOWING INSTALLATION.
4. THE SEDIMENT TRAP SHALL BE CHECKED FOR SEDIMENT
ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM EVENT.
SEDIMENT SHOULD BE REMOVED WHEN IT REACHES ONE-HALF
OF THE DESIGN VOLUME OF THE WET STORAGE.
5. TEMPORARY SEEDING OR OTHER STABILIZATION METHODS, SUCH
AS BASE AGGREGATE WILL FOLLOW IMMEDIATELY AFTER REACHING
FINAL GRADES.
6. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE
THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE
FERTILIZED AND RE -SEEDED AS NEEDED TO ESTABLISH GROWTH.
7. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE
INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT
CONTROL PRACTICES.
8. DURING FINE GRADING OPERATIONS, MAINTAIN ALL DIVERSION
DITCHES TO THE SEDIMENT TRAP. THE SEDIMENT TRAP SHALL
REMAIN FUNCTIONAL THROUGHOUT CONSTRUCTION.
AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL
ADMINISTRATOR, THE TEMPORARY EROSION AND SEDIMENT CONTROLS
CAN BE CLEANED UP OR REMOVED, AND THE SEDIMENT TRAP CAN BE
FILLED IN AND SEEDED FOR SITE STABILIZATION.
PERMANENT STABILIZATION
ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH
STRAW & SEED IMMEDIATELY FOLLOWING FINISHED GRADE. SEEDING
SHALL BE DONE WITH KENTUCKY 31 TALL FESCUE IN ACCORDANCE TO
STANDARD AND SPECIFICATION 3.32, PERMANENT SEEDING, OF THE
VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. ANY FERTILIZER
AND LIME APPLICATIONS SHALL BE IN ACCORDANCE WITH SOIL TEST
RESULTS. ALL SEEDED AREAS WILL BE STRAW MULCHED TO PROTECT
AGAINST RILL EROSION AND TO PRESERVE SOIL MOISTURE THAT WILL
ENHANCE SEED GERMINATION. CRIMPING, PUNCH ROLLER -TYPE ROLLERS,
OR TRACK WALKING MAY BE USED TO INCORPORATE STRAW MULCH INTO
THE SOIL ON SLOPES IF STRAW IS TO BE USED.
EROSION CONTROL MAINTENANCE
11. IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL
BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. THE
FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR:
12. THE CONSTRUCTION ENTRANCE SHALL BE CHECKED DAILY FOR SOIL
BUILDUP, IF THE ENTRANCE BECOMES CLOGGED WITH SOIL AND
FAILS TO PREVENT THE TRANSPORTATION OF SOIL ONTO THE
ROADWAY, ADDITIONAL STONE, REPLACEMENT OF STONE, OR A
WASH -RACK MAY BE REQUIRED.
13. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL
AND AT LEAST DAILY DURING PROLONGED RAINFALL. CLOSE
ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT
FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD
THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME
INEFFECTIVE PRIOR TO THE END OF THE EXPECTED USABLE LIFE
AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE
REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED
AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN
DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE
BARRIER. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER
THE SILT FENCE IS NO LONGER REQUIRED SHALL BE DRESSED TO
CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED.
14. DIVERSION DIKES SHALL BE INSPECTED AFTER EVERY STORM AND
REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET, OR
SEDIMENT TRAPPING FACILITY AS NECESSARY. ONCE EVERY TWO
WEEKS, WHETHER A STORM EVENT HAS OCCURRED OR NOT, THE
MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED.
DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY
MUST BE REPAIRED BEFORE THE END OF EACH WORKING DAY.
15. STORMWATER CONVEYANCE CHANNELS (WHERE APPLICABLE):
15.1. GRASS LINED CHANNELS - DURING THE INITIAL ESTABLISHMENT,
GRASS LINED CHANNELS SHOULD BE REPAIRED IMMEDIATELY
AND RE-ESTABLISHED IF NECESSARY. AFTER GRASS HAS
BECOME ESTABLISHED, THE CHANNEL SHOULD BE CHECKED
PERIODICALLY TO DETERMINE IF THE GRASS IS WITHSTANDING
FLOW VELOCITIES WITHOUT DAMAGE. IF THE CHANNEL IS TO BE
MOWED, IT SHOULD BE DONE IN A MANNER THAT IT WILL NOT
DAMAGE THE GRASS.
15.2. RIPRAP-LINED CHANNELS - RIPRAP LINED CHANNELS SHOULD
BE CHECKED PERIODICALLY TO ENSURE THE SCOUR IS NOT
OCCURRING BENEATH FABRIC UNDERLINING OF THE RIPRAP
LAYER. THE CHANNEL SHOULD ALSO BE CHECKED TO
DETERMINE THE STONES ARE NOT DISLODGED BY LARGE
FLOWS.
15.3.117 SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT
SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE
GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE
REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL.
16. CHECK DAMS (WHERE APPLICABLE): SHALL BE CHECKED FOR
SEDIMENT ACCUMULATION AFTER EVERY RUNOFF PRODUCING STORM
EVENT. SEDIMENT SHOULD BE REMOVED WHEN IT REACHES
ONE-HALF OF THE ORIGINAL HEIGHT OF THE MEASURE. REGULAR
INSPECTIONS SHALL BE MADE TO INSURE THE CENTER OF EACH
DAM IS LOWER THAN THE EDGES. EROSION CAUSED BY HIGH
FLOWS AROUND THE EDGES OF THE DAM SHOULD BE CORRECTED
IMMEDIATELY.
17. THE EARTHEN EMBANKMENTS SHALL BE CHECKED REGULARLY TO
ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN
DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT.
18. THE STORMWATER MANAGEMENT FACILITIES SHOULD BE CHECKED
REGULARLY BY THE HOMEOWNERS ASSOCIATIONS TO ENSURE THAT
THEY ARE STRUCTURALLY SOUND AND HAVE NOT BEEN DAMAGED
BY EROSION.
19. THE EMERGENCY SPILLWAY SHALL BE CHECKED REGULARLY TO
ENSURE THAT ITS LINING IS WELL ESTABLISHED AND EROSION
RESISTANT. GRASS SHALL BE KEPT MOWN BELOW A HEIGHT OF
15" AND THE OUTLET SHOULD BE CHECKED FOR CLOGGING.
20. THE DAM SECTION SHALL BE KEPT FREE OF SAPLINGS OR
TREES.(REFER TO THE ADDITIONAL MAINTENANCE SPECIFICATIONS)
21. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT
A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED
AND RE -SEEDED AS NEEDED. IN THE EVENT THAT THE APPLIED
SEEDING FAILS TO TAKE HOLD, BLANKET MATTING SHALL BE
PLACED IN APPROPRIATE AREAS DEEMED NECESSARY BY THE
ENGINEER OR EROSION CONTROL INSPECTOR.
SEQUENCE OF CONSTRUCTION
1. AFTER OBTAINING ALL REQUIRED PERMITS THE CONTRACTOR SHALL
COORDINATE A PRE -CONSTRUCTION MEETING, ALLOWING 72 HOURS
FOR ITS COORDINATION.
2. INSTALL CONSTRUCTION ENTRANCE OFF OF EXISTING GRAVEL DRIVE.
2.1. SHOULD THE TEMPORARY CONSTRUCTION ENTRANCE NOT BE
MAINTAINED PROPERLY OR AN EXCESSIVE AMOUNT OF SOIL
FOUND TRACKED ONTO THE PUBLIC ROADWAY, THEN A PAVED
CONSTRUCTION ENTRANCE, WATER TANKER TRUCK WITH TWO (2)
PRESSURE WASHERS AND A SETTLING AREA MAY BE REQUIRED
BY THE EROSION AND SEDIMENT CONTROL PROGRAM
ADMINISTRATOR.
3. CLEARING AND GRUBBING SHALL FIRST BE LIMITED TO THAT
NECESSARY TO INSTALL SILT FENCE, AND OTHER PERIMETER
CONTROLS. ALL PERIMETER CONTROLS MUST BE MADE FUNCTIONAL
PRIOR TO ANY UPSLOPE LAND DISTURBANCE THAT TAKES PLACE.
3.1. SILT FENCE SHALL BE INSTALLED ON THE DOWNHILL SIDE OF
THE ACTIVE TRENCHING OPERATIONS.
4. PRIOR TO ADDITIONAL CLEARING AND GRUBBING, THE CONTRACTOR
SHALL COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY
OF ALBEMARLE.
5. CLEAR AND GRUB THE REMAINDER OF PROJECT AREA.
5.1. THE LAND DISTURBANCE SHALL BE RESTRICTED TO THE LIMITS
OF DISTURBANCE SHOWN IN THE APPROVED EROSION CONTROL
PLANS.
5.2. THESE LIMITS ARE CONFINED TO THE PROPERTY BOUNDARIES
SHOWN HEREON THIS PLAN.
6. STOCKPILE TOPSOIL WITHIN AN AREA ON THE PROPERTY OR A
LOCATION APPROVED BY ALBEMARLE COUNTY COMMUNITY
DEVELOPMENT. INSTALL SILT FENCE AT THE PERIMETER OF
STOCKPILE(S) AS NECESSARY.
7. DENUDED AREAS SHALL DRAIN TO AN APPROVED EROSION CONTROL
MEASURE AT ALL TIMES DURING CONSTRUCTION.
8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED
TO ALL DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE
IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL
STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED
AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION
SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT
FOR MORE THAN ONE YEAR.
9. LIME, FERTILIZE AND APPLY TEMPORARY OR PERMANENT SEEDING TO
ALL DENUDED AREAS IMMEDIATELY AFTER ACHIEVING FINAL GRADES.
10. ALL PERMANENT SLOPES STEEPER THAN 3:1 SHALL RECEIVE
STABILIZATION WITH LANDSCAPING VEGETATION HARDIER THAN
GRASS, WHICH WILL NOT REQUIRE MOWING.
11. AFTER PROPOSED CONSTRUCTION IS COMPLETED AND THE SITE IS
COMPLETELY STABILIZED, PERMISSION IS TO BE OBTAINED FROM
THE EROSION CONTROL INSPECTOR FOR THE REMOVAL OF SILT
FENCING AND OTHER REMAINING TEMPORARY EROSION CONTROL
MEASURES.
EROSION AND SEDIMENT CONTROL MINIMUM STANDARDS
1. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED
TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS
REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL
STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED
AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION
SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT
FOR MORE THAN ONE YEAR.
CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT ALLOW ANY
SEDIMENT TO EXIT THE PROJECT LIMITS.
2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND
BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH
SEDIMENT TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE
FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION
OF ALL SOIL STOCKPILES ON SITE AS WELL AS BORROW AREAS
AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE.
CONTRACTOR TO PROTECT STOCKPILE AREAS WITH SILT FENCE.
3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON
DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED.
PERMANENT VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED
UNTIL A GROUND COVER IS ACHIEVED THAT IS UNIFORM, MATURE
ENOUGH TO SURVIVE AND WILL INHIBIT EROSION.
CONTRACTOR SHALL ESTABLISH A VEGETATIVE COVER ON ALL DENUDED
AREAS.
4. SEDIMENT TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND
OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE
CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING
ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND
DISTURBANCE TAKES PLACE.
CONTRACTOR SHALL ESTABLISH THE PERIMETER CONTROLS OF SUPER SILT
FENCE AS THE FIRST STEP OF THE LANDS DISTURBANCE FOR THIS
PROJECT.
5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN
STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY
AFTER INSTALLATION.
CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AFTER EACH
RAINFALL EVENT.
6. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND
CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE
SERVED BY THE TRAP OR BASIN.
THERE ARE TWO SEDIMENT TRAP PROPOSED.
A. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134
CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL
ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES.
B. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF
FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE
ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM
STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC
YARDS PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL,
AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN
DURING A 25-YEAR STORM OF 24-HOUR DURATION. RUNOFF
COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO
A BARE EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST
WHILE THE SEDIMENT BASIN IS UTILIZED.
7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A
MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND
TO BE ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT
STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE
STABILIZING MEASURES UNTIL THE PROBLEM IS CORRECTED.THERE
ARE NO PROPOSED CUT OR FILL SLOPES. HOWEVER, THE
CONTRACTOR IS TO RESTORE THE PROJECT AREA TO EXISTING
GRADE. IF THE AREAS WITH NATURALLY STEEP SLOPES ARE FOUND
TO BE ERODING EXCESSIVELY AFTER ONE YEAR, CONTRACTOR IS
TO PROVIDE ADDITIONAL SLOPE STABILIZING MEASURES UNTIL THE
PROBLEM IS CORRECTED.
8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL
SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR
PERMANENT CHANNEL, FLUME OR SLOPE DRAIN
STRUCTURE. MAXIMIZE SHEETFLOW AND GROUNDWATER INFILTRATION
9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE
OR OTHER PROTECTION SHALL BE PROVIDED. CONTRACTOR TO
NOTIFY ENGINEER AND COUNTY EROSION CONTROL INSPECTOR.
10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING
CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN
WATER CANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST
BEING FILTERED OR OTHERWISE TREATED TO REMOVE
SEDIMENT.THERE ARE NO STORM SEWER INLETS PROPOSED.
11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS
OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION
AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING
SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND
RECEIVING CHANNEL.THERE ARE NO STORMWATER CONVEYANCE
CHANNELS OR PIPES PROPOSED.
12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS
SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT
TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST
EXTENT POSSIBLE DURING CONSTRUCTION. NON -ERODIBLE
MATERIAL SHALL BE USED FOR THE CONSTRUCTION OF CAUSEWAYS
AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THESE
STRUCTURES IF ARMORED BY NON -ERODIBLE COVER
MATERIALS.CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25
UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO
INTERMITTENT STREAM CROSSINGS.
13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION
VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A
TEMPORARY VEHICULAR STREAM CROSSING CONSTRUCTED OF
NON -ERODIBLE MATERIAL SHALL BE PROVIDED.CONTRACTOR SHALL
FOLLOW THE VESCH CHAPTER 3.25 UTILITY STREAM CROSSING
REQUIREMENTS FOR THE TWO INTERMITTENT STREAM CROSSINGS.
14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS
PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES
SHALL BE MET.CONTRACTOR SHALL FOLLOW FOLLOW ALL
APPLICABLE FEDERAL, STATE AND LOCAL REQUIREMENTS FOR THE
TWO INTERMITTENT STREAM CROSSINGS.
15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED
IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS
COMPLETED. CONTRACTOR SHALL FOLLOW THE VESCH CHAPTER 3.25
UTILITY STREAM CROSSING REQUIREMENTS FOR THE TWO
INTERMITTENT STREAM CROSSINGS.
16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE
WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER
APPLICABLE CRITERIA:
A. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT
ONE TIME.
B. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF
TRENCHES.
C. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR
PASSED THROUGH AN APPROVED SEDIMENT TRAPPING DEVICE, OR
BOTH, AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY
AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY.
D. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY
COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE
STABILIZATION.
E. RE -STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH
THIS CHAPTER.
F. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED
WITH.CONTRACTOR TO ADHERE TO THE APPLICABLE STANDARD FOR
PRIVATE AND PUBLIC UTILITY INSTALLATION.
17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED
OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE
TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE
PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A
PAVED OR PUBLIC ROAD SURFACE, THE ROAD SURFACE SHALL BE
CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT
SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR
SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL
AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT
IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO
INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER
LAND -DISTURBING ACTIVITIES. CONTRACTOR SHALL MAKE PROVISIONS
TO KEEP ADJACENT ROADS CLEAN FROM SOIL BUILD-UP.
18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL
BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR
AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED,
UNLESS OTHERWISE AUTHORIZED BY THE VESCP AUTHORITY.
TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING
FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE
PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND
SEDIMENTATION. CONTRACTOR SHALL STABILIZE SITE, AND OBTAIN
INSPECTOR APPROVAL PRIOR TO REMOVING EC MEASURES. UPON
APPROVAL OF THE ENVIRONMENTAL INSPECTOR, INSTALL
INFILTRATION AREAS AND CONNECT ROOF DRAINS.
19. PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT
SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION
AND DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK
FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY
STORM OF 24-HOUR DURATION IN ACCORDANCE WITH THE
FOLLOWING STANDARDS AND CRITERIA. STREAM RESTORATION AND
RELOCATION PROJECTS THAT INCORPORATE NATURAL CHANNEL
DESIGN CONCEPTS ARE NOT MAN-MADE CHANNELS AND SHALL BE
EXEMPT FROM ANY FLOW RATE CAPACITY AND VELOCITY
REQUIREMENTS FOR NATURAL OR MAN-MADE CHANNELS:THIS
PROJECT DOES NOT INCLUDE ANY ADDITIONAL IMPERVIOUS
SURFACES AND THE PROJECT AREA WILL BE RESTORED TO ITS
EXISTING CONIDTIONS.THEREFORE WILL NOT PRODUCE ANY
ADDITIONAL STORMWATER RUNOFF.
A. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE
SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR
MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR
THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE
SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE
PIPE OR PIPE SYSTEM SHALL BE PERFORMED.
B. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED USING
THE VSMP CHANNEL PROTECTION CRITERIA. STORMWATER DISCHARGES
ARE CLASSIFIED INTO ONE OF THREE TYPES OF CHANNEL.
(1) "MANMADE STORMWATER CONVEYANCE SYSTEM" MEANS A
PIPE, DITCH, VEGETATED SWALE, OR OTHER STORMWATER
CONVEYANCE SYSTEM CONSTRUCTED BY MAN EXCEPT FOR
RESTORED STORMWATER CONVEYANCE SYSTEMS OR,
(A) THE MANMADE STORMWATER CONVEYANCE SYSTEM SHALL
CONVEY THE POST -DEVELOPMENT PEAK FLOW RATE FROM
THE TWO-YEAR EVENT WITHOUT CAUSING EROSION OF THE
SYSTEM DETENTION OF THE STORMWATER OR DOWNSTREAM
IMPROVEMENTS MAY BE INCORPORATED INTO THE APPROVED
LAND -DISTURBING ACTIVITY TO MEET THIS CRITERIA AT THE
DISCRETION OF THE STORMWATER PROGRAM ADMINISTRATIVE
AUTHORITY.
(B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED
STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE
SYSTEMS SHALL BE MET.
QDEVELOPED <= I.F. * (QPRE-DEV. * RVPRE-DEV.) /
RVDEVELOPED
UNDER NO CONDITION SHALL QDEVELOPED > Q PRE-DEV.
NOR SHALL QDEVELOPED BE REQUIRED TO BE LESS THAN
THAT
QFOREST * RVPRE-DEV.)/RVDEVELOPED
OR IN ACCORDANCE WITH ANOTHER METHODOLOGY THAT IS
DEMONSTRATED BY THE VSMP AUTHORITY TO ACHIEVE
EQUIVALENT RESULTS AND IS APPROVED BY THE BOARD.
(2) "NATURAL STORMWATER CONVEYANCE SYSTEM" MEANS THE
MAIN CHANNEL OF A NATURAL STREAM AND THE FLOOD -PRONE
AREA ADJACENT TO THE MAIN CHANNEL OR,
(3) "RESTORED STORMWATER CONVEYANCE SYSTEM" MEANS A
STORMWATER CONVEYANCE SYSTEM THAT HAS BEEN DESIGNED
AND CONSTRUCTED USING NATURAL CHANNEL DESIGN
CONCEPTS. RESTORED STORMWATER CONVEYANCE SYSTEMS
INCLUDE THE MAIN CHANNEL AND THE FLOOD -PRONE AREA
ADJACENT TO THE MAIN CHANNEL.
(A) THE DEVELOPMENT SHALL BE CONSISTENT, IN COMBINATION
WITH OTHER STORMWATER RUNOFF, WITH THE DESIGN
PARAMETERS OF THE RESTORED STORMWATER CONVEYANCE
SYSTEM THAT IS FUNCTIONING IN ACCORDANCE WITH THE
DESIGN OBJECTIVES.
(B) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED
STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE
SYSTEMS SHALL BE MET. SEE 19(8)(1)(8).
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Lic. No.
22841 `v4
09-23-19
SSIONAL
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DATE:
09-17-2019
SCALE:, AS SHOWN
JOB#: '19.1164
CONTOUR
INTERVAL: N/A
SHEET: 4 OF 5
CtIST �i.J ,T10N
ACCESS S - / 3' ` M-2A ,A�'''I IA;_( _0"'
or
�ii;N. 2!A A{3w := i f LASL
PROFILE
2 a
70' lA IN,
t°aSPIIAI_T PAVED
EXIST M3
2% PAVrVrvl�
t
i4efU> L'd.fLil:: t1.;L_ 90111
f1` 110
IMF SS AND Ef;S
OPFPATIOti
PLAN
A{
,...._._,_.. :.:.. ........_....,.;,.- --' - c" Its %f-"hdf
7'.7.x"'f:
SECTION A ---A
A awitutt i water talc of i uicli must be uistalled witli a intaiuInulli 1 hicli ballcock
shutoff valve <"IlpplyIhlw' a 1 l"".1i 110y e with a diarlieter of 1. 5 itiche3 for "ldequate
COLL'ytatlt l)1"ew iu'e. Wa;Sll watel lllulst be L:Ulied awav h-0111 the elltralice t0 an
aplrlovcd sttttuz, :illsednneiit sliall be 1.)lcveilted f VIn
enteriitr stone drains. ditches of watercoul-ses.
PAVED WASH RACK
NO SCA'.0
C:ornp acted Soil
Source: Va. DSWC:
Plate 3.09-1
sF SILT FENCE
CONSTRUCTION OF A SILT FENCE
(WITHOUT WIRE S UPPOR T)
1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH
UPSLOPE ALONG THE LINE OF
STAKES.
6' MAX.
I % I
FLOW r
3. STAPLE FILTER MATERIAL
TO STAKES AND EXTEND
IT INTO THE TRENCH.
4. BACKFILL AND COMPACT
THE EXCAVATED SOIL.
SHEET FLOW INSTALLATION
(PERSPECTIVE VIEW)
SF/STONE NOT REQUIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL
POINTS A SHOULD BE HIGHER THAN POINT B.
DRAINAGEWAY INSTALLATION
(FRONT ELEVATION)
E: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control,VA. DSWC PENTE. 3.10--r
TYPICAL TREATMENT - 1
(SOIL STABILIZATION BLANKET)
INSTALLATION CRITERIA
2"
TAMP FIRMLY
ANCHOR SLOT
s
ANCHOR SLOT
-0
NOTES
APPROXIMATELY 200 STAPLES REQUIRED
� PER 100 SO. YDS.
OF MATERIAL ROLL.
ANCHOR SLOTS, JUNCTION SLOTS &
CHECK SLOTS TO BE BURIED 6" TO 12".
12" MAX. 4:1 OR FLATTER
6" MAX. STEEPER THAN 4:1 y I
JUNCTION SLOT
EDGE AND END JOINTS I I I I I I I I I I
CHECK SLOT* TO BE SNUGLY ABUTTED
I
(JUTE MESH WILL HAVE I I I
TERMINAL FOLD STAPLED LAP JOINT IN
LIEU OF EDGE JOINT)
LAP JOINT 2" MIN. I I I I I I
(JUTE MESH ONLY) I I I
I I I
5' MAX. 4:1 OR FLATTER
3' MAX. STEEPER THAN 4:1 I I I I I
I I
6" TO 12" I I I I I 1 1
I I I I I I
-1 I I I I I
2" TAMP CHECK SLOT
FIRMLY r
6" TTO 12"
*CHECK SLOT 1 I I I I I
i I 1 1
- r►1 {-"+-- TI'TO 2"T-� ; ;� I I
I I I II IC I I ICI I I
I VAR. I VAR. I
6' TO 8" MIN. PLAN VIEW
STAPLING DIAGRAM
STAPLE FORMED FROM NO.11 STEEL WIRE. *CHECK SLOTS AT MIN.
8" STAPLE MIN. LENGTH FOR SANDY SOIL. NO C-C INTERVALS;
c" cAD, r uini i rnir'TU cnD nrurD cnu „NOT REQ;_D WITH ALL
JUNCTION SLOT TAMP
2„ FIRMLY 6" TO 12"
12"
T
SOURCE: VDOT ROAD AND BRIDGE STANDARDS
TERMINAL FOLD
PLATE: 3.36-,
WMA
TABLE 25
TOTAL LBS. PER ACRE
MINIMUM CARE LAWN - COMMERCIAL OR RESIDENTIAL
175-200 LBS.
- KENTUCKY 31 OR TURF -TYPE TALL FESCUE
95-100%
- IMPROVED PERENNIAL RYE GRASS
0-5%
- KENTUCKY BLUEGRASS
0-5%
HIGH MAINTENANCE LAWN
200-250 LBS.
- KENTUCKY 31 OR TURF -TYPE TALL FESCUE
100%
GENERAL SLOPE (3:1 OR LESS)
- KENTUCKY 31 FESCUE
128 LBS.
- RED TOP GRASS
2 LBS.
- SEASONAL NURSE CROP*
20 LBS.
LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1)
- KENTUCKY 31 FESCUE 108 LBS.
- RED TOP GRASS 2 LBS.
- SEASONAL NURSE CROP* 20 LBS.
- CROWN VETCH** 20 LBS.
TOTAL 150 LBS.
*USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED
BELOW:
FEBRUARY 16TH THROUGH APRIL 30TH............ ANNUAL RYE
MAY 1 ST THROUGH AUGUST 15TH ................ FOXTAIL MILLET
AUGUST 16TH THROUGH OCTOBER 31 ST........... ANNUAL RYE
NOVEMBER 1 ST THROUGH FEBRUARY 15TH ........ANNUAL RYE
*** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA
(MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE
UNHULLED SERICEA.) IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE
RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED.
WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX
DURING WARMER SEEDING PERIODS; ADD 10- 20 LBS./ACRE IN MIXES.
i ! 1. , * 1
11
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TABLE 24
Maintenance Fertilization for Permanent Seedings
Use Soil Test Recommendation or Rates Shown Below
Seeding Mixture
Formulation
Lbs. per
Lbs. per
Time
Mowing
Acre
1000 sf
Tall fescue makes
10-10-10
500
11.5
Yearly, or as
*Not closer than 3" if
up 70% or more
or
400
9.2
needed fall
occasional mowing is
of cover.
30-10-10
desired.
Spring the year
Crownvetch
Service lespedeza
0-20-0
400
9.2
following
establishment
Birdsfoot trefoil
and every 4-5
years thereafter.
Fairly uniform
Fall the year
Not required. not closer
stand of Tall
following
than 4" if occasional
Tescue & Service
5-10-10
500
11.5
establish- ment
mowing is desired, and
lespedeza, or
and every 4-5
then in fall after seed
Birdsfoot Trefoil.
years thereafter.
has matured.
Weeping
Spring the year
Not required. not closer
Lovegrass &
following
than 4" if occasional
Service lespedeza
5-10-10
500
11.5
establishment
mowing is desired, and
fairly uniform plant
and every 3-4
fall after sericea has
distribution
years thereafter.
matured.
Red & chewings
20-10-10
250
5.8
September, 30
Mow no closer than 2"
for red fescue and Ky
fescue, Kentucky
days later
December, May
bluegrass; and closer
bluegrass, hard
20-10-10
100
2.3
20-June-30, if
than 3" for fescue.
fescue mixture:
needed.
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TABLE 26
TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES
Seeding Rate
Planting
depth M
Seedingzones 2 and Seeding Date 3
g
Species M
Per
Lbs/1000
7a and 7b
6b
6a and 5b
acre
Sq. ft
(Inches)
2/1-
5/1-
8/15-
3/1-
5/1-
8/15-
3/15-
6/1-
8/1-
4/30
8/14
11/30
4/30
8114
11/15
5/31
7/31
10/31
Choose one:
BY
BY
BY
Barley
2.5 bu.
2.80
1-2
X
-
10115
X
-
10/15
X
-
10/1
Oats
3 bu.
2.21
1-2
X
-
-
X
-
-
X
-
-
Rye (4)
2.5 bu.
3.22
1-2
X
-
X
X
-
X
X
-
X
ar ey or
Rye Plus
150 lbs.
3.45
1
X
X
10/15
X
X
10/15
X
X
10/1
Foxtail
X
X
X
X
X
X
X
X
X
millet 5)
Weeping
41bs.
0.09
1/4-1/2
-
X
-
-
X
-
-
X
-
lovegrass
I t 1 t t I I I I I I I I
Annual ryegrasS 50lbs. 1.15 1/4-1/2 X - 11/1 X - 11/1 X - 8/15
Millet (7) 50 lbs. 1.15 1/2 - X - - X - - X -
(1) Applicable on slopes of 3:1 or flatter
(2) Refer to figure A - Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990
(3) Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed
(4) May be used as a nurse crop for late fall/early winter permanent seedings, add 56 Ibs/ac. to the permanent
seeding mixture
Maryland State Highway Administration Temporary Seed Mix
(5) May be used as a nurse crop for mid -summer permanent seedings. Add 2 Ibs/ac to permanent seed mix.
(6) May be used as a nurse crop for mid -summer permanent seedings. Add 10 Ibs/ac. to the permanent seeding
mix.
ST SEDIMENT 'TRAP
TEMPORARY SEDIMENT TRAP
1'I VARIABLE
+ t
ORIGINAL
GROUND
ELEV.
* SEE PLATE 3.13-1
67 CU. YD./ACRE
67 CU. YD./ACRE
(EXCAVATED)
N
go
a I VARIABLE}
4' MAX.
FILTER CLOTH ORIGINAL
GROUND
ELEV.
COARSE AGGREGATE** CLASS I RIPRAP
CROSS SECTION OF OUTLET
CLASS I RIPRAP
LENGTH (IN FEET) _
6 X DRAINAGE AREA
(IN AC.)
DIVDIKEION
COARSE AGGREGATE
EXCAVATED / f FILTER CLOTH �\
AREA
**COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5
OUTLET (PERSPECTIVE VIEW)
SOURCE: VA. DSWC
PLATE. 3.13-2
MINIMUM TOP WIDTH (W)
REQUIRED FOR SEDIMENT
TRAP EMBANKMENTS
ACCORDING TO HEIGHT OF
EMBANKMENT (FEET)
]�~���EXCAVATED AREA
MAX. DEPTH = 4'
JfCI. UJYYV VU
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W
1.5
0.5
2.0
2.0
1.0
2.0
2.5
1.5
2.5
3.0
2.0
2.5
3.5
2.5
3.0
H 4.0 3.0 3.0
4.5 3.5 4.0
5.0 4.0 4.5
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DATE: 09-17-2019
SCALE:; AS SHOWN
JOB#: '19.1164-
CONTOUR
INTERVAL: N/A
SHEET:
5 OF 5