HomeMy WebLinkAboutWPO201800061 Plan - Stormwater Erosion Control Plan 2018-12-03OWNER / DEVEL OPER:
PROPERTYADDRESS:
PLAN PREPARER:
TAX MAP PARCEL No:
LOT AREA:
ZONING:
USE:
BUILDING HEIGHT.:
SETBACKS:
PROPOSED IMPERVIOUS AREA:
PROPOSED TURFAREA:
SCHEUMANN, CATHERINE P
508 ASHLEY WAY
PEACHTREE CITY GA, 30269
BUNDORAN FARM
NORTH GARDEN VA, 22959
ROUDABUSH, GALE, & ASSOCIATES
914 MONTICELLO ROAD
CHARLOTTESVILLE, VA. 22902
(434)-977 0205
08600-00-00-12200
25.67AC.
RURAL AREAS DISTRICT (RA)
1 DETACHED SINGLE FAMILY RESIDENTIAL DWELLING
MAXIMUM STRUCTURE HEIGHT IS 35 FEET
FRONT SIDE REAR
75' 25' 35'
0.80 AC.
1.70 AC.
PROPOSED OPEN SPACE AREA: 4.35 AC.
MAGISTERIAL DISTRICT. SAMUEL MILLER
DRAINAGEDISTRICT NORTH FORK HARDWARE RIVER, HUC JM46
BOUNDARY: DB. 4992PG. 227
DB. 4031PG. 83-84 (PLAT)
DB. 3486PG. 97-154 (PLAT)
TOPOGRAPHY. ROGER W. RAY& ASSOCIATES INC. -FEB. 2018
CRITICAL SLOPES: CRITICAL SLOPES EXIST ON THIS SITE & ARE LOCATED
AS SHOWN. NO CRITICAL SLOPEAREAS EXIST WITHIN
THE LIMITS OF DISTURBANCE
FLOODPLAIN: THE SUBJECT PROPERTY IS NOT LOCATED WITHIN THE
FL OODPLAIN.
STORMWA TER MANAGEMENT. WATER QUALITY OBTAINED FROM 4.35ACRES
PROTECTED FOREST/OPEN SPACE ON PROPERTY.
WATER QUANTITY OBTAINED FROM LIMITS OF
ANALYSIS DOWNSTREAM OF RECEIVING CHANNEL.
SWM NOTE: THE SWM FOREST & OPEN SPACE EASEMENT (DB5115
PG 153 IS SUBJECT TO THE GUIDANCE SET FORTH BY
DEQ IN THE VIRGINIA STORMWA TER MANAGEMENT
PROGRAM. THEAREAS WILL REMAIN UNDISTURBED hV A
NATURAL, VEGETATED STATE, EXCEPTACTIVITIES AIS
APPROVED BY THE LOCAL PRO GRA M A U THORI T Y, SUCH
AS FOREST MANAGEMENT, CONTROL OF INVASIVE
SPECIES, REPLANTING AND REVEGETA TING, PASSIVE
RECREATION (E.G., TRAILS), AND LIMITED BUSH HOGGING
TO MAINTAIN DESIRED VEGETATIVE COMMUNITY (BUT NO
MORE THAN FOUR TIMES PER YEAR).
THE STREAM BUFFER(S) SHOWN HEREON SHALL BE NIANAGED INACCORDANCE WITH THE
ALBEMARLE COUNTY WATER PROTECTION ORDINANCE
THIS SITE IS NOT LOCATED WITHIN THE WATERSHED OFA PUBLIC WATER SUPPLY
RESERVOIR.
11
* �, �` '
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 THE
REQUIREMENTS AND INTENT OF THE LOCAL EROSION CONTROL ORDINANCE. CONTRACTOR SHALL PROVIDE
THE NECESSARY DIVERSION DITCHES, DIKES OR TEMPORARY CULVERTS REQUIRED TO PREVENT MUD 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 REMOVE
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.
SCALE: 11=1000 FEET
SHEET INDEX
SHEET 1-------- COVER SHEET
SHEET 2-------- EXISTING CONDITIONS
SHEET 3--------- EROSION CONTROL PLAN - PHASE 1
SHEET 4-------- EROSION CONTROL PLAN - PHASE 2
SHEET 7-------- SWM PLAN -WATER QUALITY COMPLIANCE
SHEET 8-------- SWM PLAN -WATER QUANTITY COMPLIANCE
SINGLE F.4WLY CGNSTRUCT"ON
1. SILT FENCE, SEDIMENT TRAPS AND OTHER PROTECTIVE MEASURES SHALL BE PROVIDED IN
AREAS WHERE SEDIMENT FROM DISTURBED AREAS MAY LEAVE THE SITE, AND MUST BE
PROPERLY INSTALLED BEFORE LAND DISTURBANCE. THESE MEASURES MUST REMAIN INSTALLED
AND MAINTAINED UNTIL ADEQUATE STABILIZATION IS ACHIEVED AS DETERMINED BY THE
PROGRAM AUTHORITY.
2. ALL EROSION MEASURES ARE SUBJECT TO INSPECTION PERIODICALLY AND AFTER EACH
RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS TO MAINTAIN THE
EFFECTIVENESS OF THE EROSION CONTROL DEVICES AND CLEANUP OF SEDIMENTATION MUST
BE MADE IMMEDIATELY. IF EROSION CONTROL MEASURES ARE FOUND TO BE INADEQUATE, OR
IN NEED OF REPAIR, BY A COUNTY INSPECTOR, YOU WILL BE NOTIFIED.
3. A TEMPORARY STONE CONSTRUCTION ENTRANCE SHALL BE PROVIDED WHEREVER TRAFFIC WILL
BE LEAVING A CONSTRUCTION SITE AND WHERE THERE EXISTS THE POSSIBILITY OF
TRANSPORTING MUD DIRECTLY ONTO A ROAD OR OTHER PAVED AREA.
4. ALL DENUDED AREAS ON THE SITE SHALL BE STABILIZED WITHIN SEVEN (7) DAYS OF FINAL
GRADING WITH PERMANENT VEGETATION OR A PROTECTIVE GROUND COVER SUITABLE FOR THE
TIME OF YEAR. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO
DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT
(UNDISTURBED) FOR LONGER THAN THIRTY (30) DAYS.
5. A PERMANENT STABILIZATION/VEGETATIVE COVER SHALL BE ESTABLISHED ON ALL DENUDED
AREAS WITHIN NINE (9) MONTHS OF THE START OF CLEARING OR GRADING. UNLESS
DOCUMENTED IN WRITING TO THE PROGRAM AUTHORITY AT THE START OF LAND DISTURBANCE,
THE NINE (9) MONTHS SHALL BE MEASURED FROM THE PERMIT ISSUANCE DATE.
8. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCK PILES AND BORROW AREAS SHALL BE
STABILIZED, COVERED, OR PROTECTED WITH SEDIMENT TRAPPING MEASURES.
7. ALL STORM SEWER INLETS THAT ARE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED
SO THAT SEDIMENT -LADE! WATER CANNOT ENTER THE STORM WATER CONVEYANCE SYSTEM
WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT.
8. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL NOT BE REMOVED UNTIL
DISTURBED AREAS ARE STABILIZED. AFTER STABILIZATION IS COMPLETE, ALL MEASURES SHALL
BE REMOVED WITHIN 30 DAYS, UNLESS OTHERWISE AUTHORIZED BY THE PROGRAM AUTHORITY.
TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF
TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION
AND SEDIMENTATION.
APPROVED
by th Albemarle County
Commur,ity Deve i,oprfient Department
Fi'
pF Dl�
DAVID M. ROBINSON
Lic. No.
'O 55/6/76 /<v
31
�SS/ONAL ECG
k
DATE
August 03, 2013
FILE NUMBER
8236
SHEET
1 OF 6
91
DENOTES ALBEMARLE COUNTY
GIS CRITICAL SLOPES
TX 86-271
REVISED PARC
WILLOWFIELDS FP
D,& 4456-390, 395 8
D.B. 3810-701 THRU
m
IF
0
i
SOIL TYPES 77
HYDREIL_❑GIC SEAL GROUPi B o
I
®®6921
143 53l ® ®
IRON & CAP SET
ELEVATION ® 735.35
IF
PRE DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
PRE DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
PRE DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
1 YEAR Input Data:
2 YEAR Input Data:
10 YEAR Input Data:
Rainfall Distribution Type:
Type II
Rainfall Distribution Type:
Type II
Rainfall Distribution Type:
Type II
Rainfall Depth:
3.04
in
Rainfall Depth:
3.68
in
Rainfall Depth:
5.57
in
Base Flow:
0.000
cfs
Base Flow:
0.000
cfs
Base Flow:
0.000
cfs
la/P Interpolation:
On
la/P Interpolation:
On
la/P Interpolation:
On
Subarea Downstream
Area
CN Tc
Tt
Subarea Downstream
Area
CN Tc
Tt
Subarea Downstream
Area
CN Tc Tt
Name Subareas
(acre)
(min)
(min)
Name Subareas
(acre)
(min)
(min)
Name Subareas
(acre)
(min) (min)
DA-PRE_DEV NONE
2.50
61 36.10
32.00
DA-PRE_DEV NONE
2.50
61 36.10
32.00
DA-PRE_DEV NONE
2.50
61 36.10 32.00
Computed Results:
Computed Results:
Computed Results:
Peak Discharge (Qp):
0.453
cfs
Peak Discharge (Qp):
0.989
cfs
Peak Discharge (Qp):
3.143
cfs
Time to Peak:
12.50
hrs
Time to Peak:
12.50
hrs
Time to Peak:
12.40
hrs
Runoff Volume:
0.03
acre-ft
Runoff Volume:
0.07
acre-ft
Runoff Volume:
0.20
acre-ft
f
r
r
i
a
I " i
BENCHMARKi IF
IRON & CAP SET, (3,3 FROM
ELEVATION = 797.95 I,� £ C RNER)
£ ii, I cri47
`
�TH op
DAVID M. ROBINSON
Lic, No.
56760
0 N A L
tftl;J i- M v71r4vj
Loralo= . 1'
A
DATE
August 03, 2018
SCALE
ill =6®'
CONTOUR
OO_.,
SHEET
20F8
TEMPORARY
-i 3 ` SEDIMENT CALCULATIONS
P
Drainage
Design Volumes: STAGE -STORAGE REPORT
Wet Storage-
ELEEV (FT)
STORAGE (CF)
Minimum Volume Req'd. =
67 cy *
1.25
acres = 84 cy
Available Basin Volume
Prov'd.
= 134
cy @ 774.00
770.000
0.000
Dry Storage-
771.000
504.389
Minimum Volume Req'd. =
67 cy *
1.25
acres = 84 cy
Available Basin Volume
Prov'd.
= 135
cy @ 776.00
772.000
1259.934
773.000
2294.325
Design Elevations:
774.000
3623.906
Top of Berm = 776.00
775.000
5273.813
Berm Width = 3'
776.000
7269.177
Weir Elev = 774.00
Weir Width = 8'
Floor Elev = 770.00
Sediment Cleanout Elev
= 774.00
J➢
STorzAGE (cY) AREA(SF) f ~
0.000 394.255
18.681 614.814 1,
46.664 889.478
84.975 1171.657 i
134.219 1479.342
195.326 1812.214 # t.
269.229 2169.704 .. f
w
991011RK 1
®ATE
August 03, 201
SCALE
ill =4 '
CONTOUR a;
' O
SHEET
F
STORAGE(CY)
AREA(SF)
0.000
394.255
18.681
614.814
46.664
889.478
84.975
1171.657
134.219
1479.342
195.326
1812.214
269.229
2169.704
TEMPORARY SEDIMENT TRAP
CALCULATION
Drainage Area= 1.25 acres
Design Volumes:
STAGE -STORAGE
REPORT
'
Wet Storage-
ELEV (FT)
STORAGE (CF)
Minimum Volume Req'd. = 67 cy * 1.25 acres = 84 cy
Available Basin Volume Prov'd. = 134 cy @ 774.00
770.000
0.000
Dry Storage-
771.000
504.389
Minimum Volume Req'd. = 67 cy * 1.25 acres = 84 cy
Available Basin Volume Prov'd. = 135 cy @ 776.00
772.000
1259.934
773.000
2294.325
Design Elevations:
774.000
3623.906
Top of Berm = 776.00
775.000
5273.813
Berm Width = 3'
776.000
7269.177
Weir E1ev = 774.00
Weir Width = 81(6*1.25AC)
Floor E1ev = 770.00
Sediment Cleanout Elev = 774.00
Y
h
POST DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
POST DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
POST DEV: Runoff Hydrograph: TR-55 Tabular Hydrograph Method
1 YEAR Input Data:
2 YEAR Input Data:
10 YEAR Input Data:
Rainfall Distribution Type:
Type II
Rainfall Distribution Type:
Type II
Rainfall Distribution Type:
Type II
Rainfall Depth:
3.04
in
Rainfall Depth:
3.68
in
Rainfall Depth:
5.57
in
Base Flow:
0.000
cfs
Base Flow:
0.000
cfs
Base Flow:
0.000
cfs
la/P Interpolation:
On
la/P Interpolation:
On
la/P Interpolation:
On
Subarea Downstream
Area
CN Tc
Tt
Subarea Downstream
Area
CN Tc
Tt
Subarea Downstream
Area
CN Tc Tt
Name Subareas
(acre)
(min)
(min)
Name Subareas
(acre)
(min)
(min)
Name Subareas
(acre)
(min) (min)
DA-POST_DEV NONE
2.50
62 31.40
28.00
DA-POST-DEV NONE
2.50
62 31.40
28.00
DA-POST_DEV NONE
2.50
62 31.40 28.00
Computed Results:
Computed Results:
Computed Results:
Peak Discharge (Qp):
0.525
cfs
Peak Discharge (Qp):
1.103
cfs
Peak Discharge (Qp):
3.318
cfs
Time to Peak:
12.50
hrs
Time to Peak:
12.50
hrs
Time to Peak:
12.40
hrs
Runoff Volume:
0.04
acre-ft
Runoff Volume:
0.07
acre-ft
Runoff Volume:
0.21
acre-ft
T.M. 86-27B
REVISED PARCEL C
BOAZ M❑UNTAIN, LLC
D,B, 3057-299
D.B, 4456-390, 395 & 396 PLAT
D,B, 3810-701 THRU 706 PLAT
44I I ;
I
OO I
®I 00
10 7 Vg"
3� I ff
AREA TO BE
LIGHTLY GRADE®: FOR Ps, I
t�:LT H 0p
DAVID M. ROBINSON
Lic. No.
56760 4�
�o��ss / O N A L
rM
DATE
August 03, 2018
SCALE
ill =40'
CONMUR INTERVAL
i
FOOT
SHEET
40F8
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 BUILD A SINGLE FAMILY RESIDENCE ON LOT
"J1" LOCATED IN BUNDORAN FARM. THE DEVELOPMENT WILL INCLUDE A
LONG PRIVATE DRIVE LEADING TO THE RESIDENCE WITH PLANS OF A
FUTURE AGRICULTURAL BARN AND ASSOCIATED DRIVE. THE ALLOTTED
HOMESITE AREA CONSIST OF APPROXIMATELY 1.86 OF THE 26 ACRE
PARCEL. THE LIMITS OF DISTURBED LAND WILL INCLUDE APPROXIMATELY
2.50 ACRES IN TOTAL FOR THE DEVELOPMENT.
EXISTING SITE CONDITIONS
THE CURRENT CONDITIONS OF THIS LOT CONSISTS OF APPROXIMATELY 26
ACRES OF VACANT GENTLE SLOPING LAND THAT DRAINS TO THE
SOUTHEAST OF THE PROPERTY TO AN AN EXISTING CREEK.
ADJACENT AREAS
THE RESIDENTIAL LOT IS BOUND BY ADJACENT RESIDENTIAL PROPERTIES
AND IS FRONTED TO THE NORTHEAST BY STATE ROUTE 692 (PLANK
ROAD). STATE ROUTE 29 IS TO THE EAST 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.
SOILS
25C-DYKE SILT LOAM, 7 TO 15 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B. DEEP, MODERATELY SLOPING AND WELL
DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS
CONSIST OF SILT LOAM, CLAY, AND GRAVELLY CLAY. PERMEABILITY IS
MODERATE WHILE AVAILABLE WATER CAPACITY IS HIGH. SURFACE RUNOFF
IS MEDIUM. HAZARD OF EROSION IS MODERATE.
26C3-DYKE CLAY LOAM 7 TO 15 PERCENT SLOPES SEVERELY ERODED
HYDROLOGIC SOIL GROUP B. DEEP, MODERATELY SLOPING AND WELL
DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS
CONSIST OF CLAY LOAM, CLAY, AND GRAVELLY CLAY. PERMEABILITY IS
MODERATE WHILE AVAILABLE WATER CAPACITY IS HIGH. SURFACE RUNOFF
IS MEDIUM. HAZARD OF EROSION IS SEVERE.
41 B-HIWASSEE LOAM 2 TO 7 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B. DEEP, GRADUAL SLOPING AND WELL DRAINED.
STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF
LOAM AND CLAY. PERMEABILITY IS MODERATE WHILE AVAILABLE WATER
CAPACITY IS MODERATE. SURFACE RUNOFF IS MEDIUM. HAZARD OF
EROSION IS SLIGHT.
41 C-HIWASSEE LOAM 7 TO 15 PERCENT SLOPES
HYDROLOGIC SOIL GROUP B. DEEP,MODERATELY SLOPING AND WELL
DRAINED. STARTING AT SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS
CONSIST OF LOAM, CLAY, CLAY, AND BEDROCK. PERMEABILITY IS
MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATE. SURFACE
RUNOFF IS MEDIUM. HAZARD OF EROSION IS MODERATE.
19C-CULLEN LOAM, 7 TO 15 PERCENT SLOPES
DEEP; NEARLY LEVEL AND WELL DRAINED. STARTING AT SURFACE LAYER
TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM AND CLAY. PERMEABILITY
IS MODERATE WHILE AVAILABLE WATER CAPACITY IS MODERATELY HIGH.
HAZARD OF EROSION IS MODERATE.
77 - RIVERVIEW-CHEWACLA COMPLEX (0% TO 2% SLOPES
DEEP, NEARLY LEVEL WELL DRAINED SOILS ON FLOODPLAINS. STARTING AT
SURFACE LAYER TO SUBSTRATUM, SOIL LAYERS CONSIST OF LOAM AND
SILT LOAM OR SILT CLAY LOAM. PERMEABILITY IS HIGH WHILE AVAILABLE
WATER CAPACITY IS MODERATELY HIGH. OCCASIONAL FREQUENCY OF
FLOODING. HAZARD OF EROSION IS SLIGHT.
CRITICAL AREAS
NO CRITICAL AREAS EXISTS WITHIN THE PROPOSED DEVELOPMENT.
STRUCTURAL PRACTICES
5. TEMPORARY CONSTRUCTION ENTRANCE (3.02) - A TEMPORARY
CONSTRUCTION ENTRANCE SHALL BE INSTALLED AT SITE ENTRANCE
OFF OF PLANK ROAD.
6. ROAD STABILIZATION (3.03) - ACCESS ROADS, PARKING AREAS, AND
OTHER ON -SITE VEHICLE TRANSPORTATION ROUTES SHALL BE
STABILIZED WITH STONE IMMEDIATELY AFTER GRADING.
7. 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.
8. SUPER SILT FENCE BARRIER - WIRE -REINFORCED SILT FENCE
BARRIER WILL BE INSTALLED TO FILTER RUNOFF FROM SHEET FLOW
AS INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN.
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 (3.39) - 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 AS TREE PROTECTION AND SILT FENCE SHALL BE
INSTALLED AS THE FIRST STEP OF DISTURBANCE.
3. 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
1. 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:
2. 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.
3. 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.
4. 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.
5. STORMWATER CONVEYANCE CHANNELS (WHERE APPLICABLE):
5.1. 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.
5.2. 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.
5.3. IF SEDIMENT IS DEPOSITED IN A GRASS -LINED CHANNEL, IT
SHOULD BE REMOVED PROMPTLY TO PREVENT DAMAGE TO THE
GRASS. SEDIMENT DEPOSITED IN A RIPRAP CHANNEL SHOULD BE
REMOVED WHEN IT REDUCES THE CAPACITY OF THE CHANNEL.
6. 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.
7. THE EARTHEN EMBANKMENTS SHALL BE CHECKED REGULARLY TO
ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS NOT BEEN
DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT.
8. 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.
9. 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.
10. THE DAM SECTION SHALL BE KEPT FREE OF SAPLINGS OR
TREES.(REFER TO THE ADDITIONAL MAINTENANCE SPECIFICATIONS)
11. 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 PLANK ROAD.
2.1. SHOULD THE TEMPORARY CONSTRUCTION ENTRANCE OFF OF
PLANK ROAD 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
STOCKPILES) 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 BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS
AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE
CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY
AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND
DISTURBANCE TAKES PLACE.
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 NO SEDIMENT TRAPS OR BASINS 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
OFOREST * 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.
(8) THE PEAK DISCHARGE REQUIREMENTS FOR CONCENTRATED
STORMWATER FLOW TO NATURAL STORMWATER CONVEYANCE
SYSTEMS SHALL BE MET. SEE 19(B)(1)(B).
3.12 DIVERSION
3.13 T SEDIMENT TRAP
3.31 ('� __ TEMPORARY SEEDING
PS 3.32 PS _- PERMANENT SEEDING
�� DUST CONTROL
�,1,TH pF
DAVID M. ROBINSON
Lic. No.
56760
�o�Fss/
ONAL
DATE
August 03, 2018
SCALE
CONTOUR INTERVAL
FILE NUMBER
8236
SHEET
5®F6
CONSTRUCTION ENTRANCE SILT FENCE PERMANENT SEEDING MIXTURES FOR 0
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i = GENERAL SLOPE 3:1 OR LESS °
rr
�' - �� ( ) r 1 ���tJ ileti°i f' ,'PHAI T �,�°�'` EQ d8
1pp
FLOW d
67 CU. YD./ACRE it
t� �r - KENTUCKY 31 FESCUE 128 LBS. 4' MAX. to
,iir rail ; rr r. III I III , I` ' - RED TOP GRASS 2 LBS. (EXCAVATED) �
I�Tihr
�rrfirf a i `, �, FILTER CLOTH ORIGINAL 0 ,
i,,-MSdI - SEASONAL NURSE CROP 20 LBS.
GROUND , t!J
12�,, ELEV. L
3. STAPLE FILTER MATERIAL 4. BACKFILL AND COMPACT LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1) �* ®� �
TO STAKES AND EXTEND THE EXCAVATED SOIL.
SEE PLATE 3.13-1 COARSE AGGREGATE CLASS I RIPRAP (�
DOS m IT INTO THE TRENCH. KENTUCKY 31 FESCUE 108 LBS.
iJ a C11 � r t O_,i r IC DID I° NQ - 0 U.
t�0 f A V/ILrTH A
r0 SDI������r - RED TOP GRASS 2 LBS. � ,
31 114 I Arl L� } T� .'OPH IG t IPWICE a S T I N ®F U T T
1 Fi ,Tl i t. - SEASONAL NURSE CROP 20 LBS. L W pi
ti
::f,A„ - CROWN VETCH** 20 LBS.
PLAITOTAL 150 LBS.
/ I
�- __.. � • -' , CLASS I RIPRAP LENGTH (IN FEET) _ °ice � �
` <-• *USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED -
' a'tl
T� 31 it1 BELOW: (IX DRAINAGE AREA °
(IN AC.)
G 1- G I= FEBRUARY 16TH THROUGH APRIL 30TFL ...........ANNUAL RYE �` DIvDIKEaN W
MAY 'I ST THROUGH AUGUST 15TH ................ FOXTAIL MILLET�� 0
AUGUST'16TH THROUGH OCTOBER 31ST........ ...ANNUAL RYE L
Isl[wTl tI -III -III - NOVEMBER 1ST THROUGH FEBRUARY 15TH ........ANNUAL RYE ~m
I'1-'=' SHEET FLOW INSTALLATION
(k *** SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA
(PERSPECTIVE VIEW)
A iilutttamiawatet Cap of I utclr-tit ld be i.itstakd N-Vitlt a itltlttlltl t111 111C11. ballci_rcl<:... (MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE
lutoff vatve nm wat!?r eNVitf: r rlitztttei oil uril`r-"rr 1tdltllttl UNHULLED SERICEA.) IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE
constatlt 1Tres lie. Wadi water 1 wA. tie car'l7ei1'awiy fi�O111 the entialice to ,rt� RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED.
°ruil•�� oiluta .� t Alt" r �,iIi 1� � ��OII�I��1�
eittitt�;. tirtni �_IraisY, clitolis cr1' �vatrectti r :._ 1 FLOW FLOW WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX�-
- DURING WARME(? EEDING PERIODS; ADD 10 20 LBS./ACRE IN MIXES. % O �N' COMMENTS
A � A � � COARSE AGGREGATE / / � ��,l4�IYT� ��/IYIIdI�IVT5
PAVES WASH RACK r3 SILT FENCE SEEDINGPERMANENT EXCAVATED / �j��
- _ - __ FERTILIZATION _ FILTER CLOTH
AREA _____V__,�'�
COUNTY COMMENTS
AND MA-INTENANCE ®6dbe1 16, 201
IDv I - ' Ir' s '• s''�, TABLE 24 **COARSE AGGREGATE SHALL BE VDOi #3, #357 OR #5 COUNTY COMMENTS
Maintenance Fertilization for Permanent Seedings ®V�lTlb�l' �,®�
-I _Use Soil Test Recommendation or Rates Shown Below OUTLET (PERSPECTIVE VIEW)
DIVERSION I I �=III=III= I = �= I I = _ Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing
_ _ - - _
I I �=1 I=1 =_=III=III=III Acre 1000 sf PLATE. 3.13�•2
I _III I - I -III- I I Tall fescue makes 10-10-10 500 11.5 Yearly, or as
*Not closer than 3" if SOURCE: VA. DSWC
10% SETTLEMENT up 70% or more or 400 9.2 needed fall occasional mowing is
0.3' FREE BOARD
SF/STONE NOT REQUIRED AFTER SLOPES ARE STABILIZED DOWNSLOPE OF OUTFALL of cover. 30-10-10 desired.
POINTS A SHOULD BE HIGHER THAN POINT B. Spring the year Do not mow crownvetch
- __ C Service
Itch 400 9.2 following MINIM U TOP W T
DESIGN FLOW DEPTH DRAINAGEWAY INSTALLATION Service lespedeza 0-20-0 i
establishment
_W)
(FRONT ELEVATION) Birdsfoottrefoil SEDIME
- -- - - - - - - - - and every 4-5 REQUIRED FOR S� E V � DATE
_ SOURCE: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control,% DSWC P7107years thereafter. r�
Fairly uniform Fall the year Not required. not closer TRAP EMBANKMENTS August ®' 2018
SUGGESTED TEMPORARY DIN MIXTURE Stand of Tall following than 4" if occasional ACCORDING TO HEIGHT OF
TeSCUe & Service 5-10-10 500 11.5 establish- ment mowing is desired, and
TYPICAL VE E - S HAP E D DIVERSION FERTILIZER: 10-20-10: 1,000 LBS/ACRE lespedeza, or and every 4-5 then in fall after seed E A J� K- -E i (FEEi") SCALE
SEPTEMBER-FEBRUARY 15: 50% ANNUAL RYE & 50% WINTER RYE 100 LBS/ACRE FEBRUARY 16-APRIL 30: Birdsfoot Trefoil. years thereafter. has matured. y 1V� 1
ANNUAL RYE 100 LBS/ACRE MAY -AUGUST: GERMAN MILLET 50 LBS/ACRE OTHER OPTIONS EXIST, SEE
VA EROSION AND SEDIMENT CONTROL HANDBOOK. Weeping Spring the year Not required. not closer
_ -- _-- - --_ - - Lovegrass &
g following than if occasional,•,
Source: Va. DSWC Plate 3.12-1 SUGGESTED PERMANENT SEEDING MIXTURE Service lespedeza 5-10-•10 500 11.5 establishment mowing is desired, and
LIME: 2 TONS/ACRE FERTILIZER: 10-20-10 1,000 LBS/ACRE fairly uniform plant and every 3-4 fall after sericea has H HO W CONTOUR INTERVAL
MARCH -MAY 15: KENTUCKY 31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE MAY 16-AUGUST 15: distribution years thereafter. matured. 1.5 0.5 2.0
KENTUCKY 3.1 FESCUE 200 LBS/ACRE, FOXTAIL MILLET 20 LBS/ACRE AUGUST 16-OCTOBER: KENTUCKY 2.0 1.0 2.0
31 FESCUE 200 LBS/ACRE, ANNUAL RYE 20 LBS/ACRE NOVEMBER-FEBRUARY: KENTUCKY 31 FESCUE September, 30 Mow no closer than 2" 2.5 1.5 2.5
200 LBS/ACRE, WINTER RYE 20 LBS/ACRE Red & chewin s 20-10-10 250 5.8 clays later y
9 for red fescue and K 3.0 2.0 2.5
fescue, Kentucky bluegrass; and closer
bluegrass, hard ry 3.5 2.5 3.0
December
blue , May
g 20-10-10 100 2.3 20-June-3O, if than 3" for fescue.
fescue mixture:
needed.
TYPICAL ORIENTATION OF TYPICAL TREA T ENT � 1 I10 H 4.5 3.5 3.0MOM
4.0
TEMPORARY SEEDING MWURES FOR - -- - I15111=11 _ 5.0 4.0 4.5
TREA T ENT , (SOIL S TABILIZA TI ®N R ANKE T'' T� II1_Ili II In,
/� �% ]�% /� ]�% INS TALA TIN CRITERIA - PIEDMONTTHE - - r- EXCAVATED AREA 11=,1111� �-
(S COIL S TARI.LIZA X IO Y L rl l V �E T) MAX. DEPTH = 4'
_ -- -- _ ORIGINAL -- -LU
TABLE 26 SOURCE: VA. DSWC GROUND ELEV. PLATE, 3.13-1
SHALLOW TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES
SLOPE �''` ANCHOR SLOT
`Y .rri NOTE s Seeding Rate Planting Seeding zones M and Seeding Date
APPROXIMATELY 200 STAPLES REQUIRED depth 1�
c ON SHALLOW SLOPES, STRIPS OF PER 100 SQ. YDS. OF MATERIAL ROLL. I
4 ANCHOR SLOTS, JUNCTION SLOTS & Species (1� Per Lbs/1000 7a and 7b 6b 6a and 5b Note: �r � Entran4ces shall ba 12 ft wide and �
m NETTING PROTECTIVE COVERINGS
J' CHECK SLOTS TO BE BURIED 6" TO 12". q. ( ) tr-Ansitiort sn'100thly into th €"G;� `P�fa.' MAY BE APPLIED ACROSS acre S ft Inches 2l1- 5/1- 8/15- 3/1- 5/1- 8/15- 3l15- 6/1- 8/1- VLStfad any E3r1d Startrl.ards, � r
fir•
THE SLOPE. 4/30 8/14 11/30 4130 8/14 11/15 5/31 7/31 10/31 Std; PE-1 for outifilt det- is h I surf oe Ddveway entrance pavement >
�O 12" MAX. 4:1 OR FLATTER LoI shall exterid o the tight of'� ay line.
f" 6°' MAX. STEEPER THAN 4:1 Choose One: BY BY BY All entrancegradea hall start back of l
JUNCTION SLOT - Barley 2.5 bu. 2.80 1-2 X - •10/15 X - 10/15 X - 10/1 t1is shoulder lime. I VVllen an existing street Is re-clev€sloped
EDGE AND END JOINTS I I I I I I I I I I Oats 3 bu. 2.21 1-2 X - - X - - X - - If ciralrlaB Is necessary, the ditch lirt 0 and modification of an oxlsting rlvewaV
# TO BE SNUGLY ABUTTED ntl`;Brioe is required, the entrance �
BERM CHECK SLOT { Rye (4) 2.5 bu. 3.22 1-2 X - X X - X X - X may bp- moved bacwk to provide 9 inches l pavem rlf }fall be oxt€�rtd d to the right
WHERE THERE IS A BERM AT THE TOP OF THE SLOPE, (JUTE MESH WILL HAVE I i I (min.) cover over pipe, f.tL.
BRING THE MATERIAL OVER THE BERM AND ANCHOR IT TERMINAL FOLD STAPLED LAP JOINT IN LLJ 0 way 11n CjP tilt extent r� �t1i 13�tnC t 0
LIEU ED EDGE JOINT) I dx I to the'aKisting drkWowayf' W
BEHIND THE BERM.
LAP JOINT 2" MIN. I I I I I I
(JUTE MESH ONLY) I I � Icc
TAMP FIRMLY l
ANCHOR SLOT
5' MAX. 4:1 OR FLATTER I I I 1 Bare or
-'� Rye Plus X X 10/15 X X 10/15 X X 10/1 r i -
STEEP 3' MAX. STEEPER THAN 4:1 I I I Y 150 1bs. 3.45 1 Pipe culvert. _ �_. t, - 2_ F a 111
SLOPE Foxtall
I { X X X X X X X X X jF' ��: rra .�
2" millet 5 ' ° urfa d r
Weeping t necessary � ;� D � � 4 Q
6" TO 12" p g
: I I I I I I I 4lbs 0.09 1/4-1/2 - X - - X - - X - °,.
ON STEEP SLOPES, APPLY 1 I I I I lovegrass� ,,✓,�, � ;' '1'�3 fit, _ ,c; ,:,s.-
TO� HETDIREC�ON COVERINGPARALLELPLORWLLEL I fi r .
1 �d
AND ANCHOR SECURELY. - I I { I Annual
Ditch flt�`sotd °ii t
I I I I I I ryegrasS 50 Ibs. 1.15 1/4-1/2 X - 11/1 X - 11/1 X - 8/15`
CHECK SLOT ,+ F"
- 1" TO 2" I { Millet (7) 50 lbs. 1.15 1/2 - X - - X - - X
. x-
2 TAMP CHECK SLOT I I I I I I I I I I
IM
FIRMLY ( ) Applicable P " a'��r u� u 1 A Ilcable on slopes of 3:1 or flatter Shoulder � < �m __
I vAR• v1 AR• I (2) Refer to figureA-Adopted from USDA, ARS Miscellaneous Publication #1475, January 1990 'f_,�,£� t',Z.,, ,u_ L_ `
.:....... PLAN IV VIEW aw n��_u�,.. -__
s" To 12" 6" To 6" MIN. (3) Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed
4 "- 4 May be used as a nurse crop for late fall/earl winter permanent seedin s, add 56 Ibs/ac. to the permanent Ed f cNiv t`'avem r1f
P P 9 °
AREA BEFORE
Y Y
BRING MATERIAL DOWN TO A LEVEL AR '•• `�• ��'
TERMINATING THE INSTALLATION. TURN THE END " S TA P LI RI G DIAGRAM
:•; :'_, seeding mature
UNDER 4" AND STAPLE AT 12" INTERVALS. 4 Mar l--le, Roadway Pinvement
and State Hi hwa Administration Tem orar Seed Mix
.- 12" STAPLE FORMED FROM N0.11 STEEL WIRE. CHECK SLOTS AT MIN. ( ) Y g Y p Y
- - permanent seed mix.
L8" STAPLE MIN. LENGTH FOR SANDY SOIL. 50' C C INTERVALS; (5) May be used as a nurse crop for mid summer permanent Seedings. Add 2 Ibs/ac to
6" STAPLE MIN. LENGTH FOR OTHER SOIL. NOT INATIO WITH ALL (6) May be used as a nurse crop for mid -summer permanent seedings. Add 10 Ibs/ac. to the permanent seeding FI URE �" PRIVATE ENTRANCE DETAIL`
`
"COMBINATION"BLANKETS
mix.
DITCH FLOW JUNCTION SLOT
TAMP TERMINAL FOLD
IN DITCHES, APPLY PROTECTIVE COVERING 2" I II FIRMLY 6" TO 12" TAMP FIRMLY2 �iTH OF PALE NUMBER
PARALLEL TO THE DIRECTION OF FLOW. 12"
USE CHECK SLOTS AS REQUIRED. AVOID I II 4" -� 1 JOINING MATERIAL IN THE CENTER OF f�
THE DITCH IF AT ALL POSSIBLE. - ® �v' ��
- DAVID M. ROBINSON
Lic. No.
10 56760 �v
SOURCE: ADAPTED FROM LUDLOW PRODUCTS BROCHURE PLATE: 3.36--1 SOURCE: VDOT ROAD AND BRIDGE STANDARDS PLATE: 3.36•-2 4'0�� G��`` SHE,
SS�ONAL EN
F Ft
I
T.M. 86-27C
REVISED PARCEL D
LINE
BEARING
DISTANCE
L1
N
30°36'03"
W
51.03'
L2
N
10° 1 1 '38"
W
57.94'
L3
N
42° 19'38"
W
68.87'
L4
N
23° 13'
17"
W
43.10'
15
N
00°02'22"
E
56.40'
L6
N
29° 14'
1 6"
W
104.70'
L7
L8
N
N
42°0507"
43°5634"
W
W
154.71 '
174.36'
L9
N
38°0849"
W
162.39'
L10
N
59° 9 21
0699
E
143.539
L11
S
43*06'23"
W
'122.67'
L12
S
59°59'24"
E
97.94'
L13
S
43°25'
10"
E
185.00'
114
N
18005'
1 1 "
W
50.33'
L15
S
41 °07'06"
E
46.80'
L1 6
N
67°20'57"
W
47.21 '
L1 7
S
39°29'
12"
E
95.14'
L18
N
09° 15'34"
W
77.65'
L19
S
21041'16"
E
101.97'
L20
N
45°20'37"
W
46.96'
L21
N
18*40'52"
W
43.53'
L22
S
27°25'26"
E
66.74'
123
N
58°20'35"
E
215.78'
U
a
N
a
n
wa-
6a:o
A Sots
8 Soils
C So€Is
D Sods
Tota3
fo—t(opsn Spa.(acresr undlsturbzdi
-t
E.�
L
J
ot�£t=afos_�f?cuans ac e>;ea£r tea
a s -
:
£
-PalattagedTur#{acres).--dEsz,Eti3ad,:gcad d
t,,.
7. S { _<
:,�P
'
"x93 V2YG5 eF�tf:ar iFiiI ke ��
1 il:
)
tr "Vn1
,K, F.`' A
174
I
>
�t„i �[
jimpeCltOl35.�IlVdf (&irefi}
3♦ '{
'�
i?�
*}1:fE3rt�Q(,+E33 S7,`,crt'e Afax�S TPi N4fi;vt�[id',5tE4 r£�4'iS UCLr9fLjWt1EL,>l4hii,i_I�f33)t,:4Ui+AY1 �i'2.�°ttt,fJa`tES is3efrl L£x` -
68� IJ •E,.
Constar is
A3�tsuaf <a n a€€ rEne, at ` ,43, `
Ta;gsYRa.7fa=. _.en.{i,-eE➢ssF 1,CQ,
Q,t FffnaF'rirtsntcti.4.a3.-
`
ASoils
R Soils
CSoils
0 soils
.c=.zstlDpen5paca
wQ,g3 •
'OS14
�+anaged�¢i
'O,IS=
'-4:_€F-
•4r.z3
f��s"
snpenJio,iy L4vzr
-ti,95
Site Results (dater QualityCompliance)
.. ..�_N, Area Cherks
t-r➢;aEsTlCIpEN sPnc=_ Jac)
ItNIPIIR%005 §Q.VER TREATED (act
IVIANAGEO TURF AREA! (act
MANAGEO TURF AREA TREATED (ac)
AREA C145CM
--------------
O.A A[ A D A C D.A. 6 iSA. S ?.x�A t`tEeK
0
�•_� ga . ', , �? �?��
R OLUx 91 4fE t ax
,727 TKO TI CT➢ ; ;?: ox_
..w, a ear ,_�;€t.,.0 a I ..a , arc.
Site Treatment Volume (ft')
Runoff Reduction Volume and TP By Draingge Area
KUNOff 92DUCTIQN OLUNIE ACH!EY90 (ft;)
:TPLOAD AVAR.€➢DLCff R€RMOVAL'(IIblyr)
TP LOAD REDUCTION=RCH0,fED [Iohv)
TP LOAD Dswirjixi.5'iib/yr
i}:A. A.
DA. D
MA.'C
I D.A. D
D.A
TOTAL
-..w1' ;:' ➢
,� ... (t,QQ
P3.CIl3 :
,U,4l;_ ,i ;
010
2.51
DiqZ
0,0
fS.tiD
: r➢�Di}
"'or,.�
�,..
PlIYt1S3&Lit LOAD ..REDUCTION :ACNIEUEO.{IYfyrt _.'l7,G!0, ,, -:i., C➢,.R4 f?,oag_e,. Eqa„a'as. s➢gf7','. zf�. .:r`". tP.+3E} `.
Total Phosphorus
FINAL Pas➢`.DEVELOPME@ T TP LDAD
'{[kjyr)
TP WAD REDU'nGkt R9QUTAEO ojyr)
TPLUAD REDULMON-ACHIEVED (lbtdr
TPICIADREMAININGllb/yr
\\/ f,i`� /, _ ,Toxa€:V =rog<n (Tt6t .arr'C (n,gfe}, 1&Cr" i. REMAINING TP LOAD REDIJCTION[99QUIRED(Ib/;tr}. 0.0E
Ta,getPLoad
losjacrel'tr} Q,4Y Penf sire, nPi durti,nrr t1 n"s } " 9
�% vXf Ei(r t;esscnrrectiar.raetar) 'rk.9D.x Total tgroget➢(For Information Plirpnses)
\ j V A POST-DEVELOPMENTLRAD{3b/yr)
_ NIT#;OGEN LOAD REDUCTION ACHIEVED,,
/f V A Vay�
/ \. A i A V/ \ f A f real sir, posr-DCLrEco vi,�rrIT§Ps a LOAD jib Jyrt :, zc.ea.:
\ /f \ //\, /\ X \f€s �y TP. i aad Reduc%`sryrt Requisd {IbfYt) W U Q4 a t e a r �J
/\ . J ... _�.,C.. .. f \ f\ �'... . • .. - i1EQ.YirgFnia Runor"fReduction Ni,eehdd fdxwe Development Compliance Spread>tteek-➢lersfon3.t3 - )
o�^�➢
\/` \ / \ / \ X / \.f< \./ \ / \ / %® ° �I� a a,9.4P Dps gnSpecif cot om 4sr:.ot3 Draft 5tds Spsecs 4lP ?e to urnrgtc F} Sta�ei
f/\ \`/\ / m - - , m . ea. _IBM Site ......_ .._.._. �;�
/\ K \, / _..
SI% I7 tttaT/ Pr,ni rr
/ \i i:.;atacl Cce4Er 13mmary "Trove°rne#:Y"s'o@rE,nd atir8 l9ut..i Lr3t Lcads. !
// 1",",
Total Rainfall : 43 inches.f \\/ \ / ! / \Treatmentlolume i\ /\\f/\% i� \ \ /ro. estlf➢r�e3t 5ace Cover {ac:?s) 3 ti2/ / / \/" / SsteLandGa�er5umrrtar
/Y
f \ \ �fJ, f \ / \
� =e
/ / /
\ K t h2d8vs �:.
e t cr sk �,. t3 t➢3 'Traott ea un [ is a /` \ %` \ ( 9 n tt Val to u6z le t) ' 4.7&7 / / z.,•
TPLuar3(Ih!yr) 2s1
/
,.$. TIV Load,(I b/Yr)::
/ \ / ,r.. €�,°.ana�ed Turf._rz�t'r. acres IJ
ice., T - � in#arnxatiaral Fur usestluiv
i /
7
/`� Lvetehrei#.RViturb �-0,2f} Al
Asa€ds:
h Soils
CSods
D Sons.
Totals
Total %of t l"
_
Forest/open (acres)
U.0
4.35
0,Ufj
D.L}}£s
4,35
o4-
rtianageddTurf (acres).
R.CCF"
`1:7Ct
d.dU:
D'QG
L70
23
imperuious Cover (a-.-.,
DOD
0.80
GAIG
DOD
6.8t3
1'.
6.85
IDO
Site Rv
U,18.
Treatment Volume ft'
4.,467
P: Load ((b/yr).
3,81:.
TN Load (lb/Yr):
'Se,os
Total Runoff Volume Reduction (ft)<
D
Total TP Load Reduction Achieved
Q:OD..
(Ib/yr)
Total TIN Load Reduction Achieved
tJ. b�
(lb/yr)
Remaining -Post Development TP toad
2,81>
(Iet4r)
Remaining TP Load Reduction .(Igjyr)-
0.00
Required
/ A, .•- �;.
SECTION OF SF=400 LF
At,
,.v.
\ \
\\/ f\
\
,
,<x.
�R ®ONOT EXCEED ALL
OWABLE \PRO fl, A PER 100 LFm ! �A�EM�Ii \rl
/ f
071
® \yam'/ \\// \\ >\ %�\ /\ \ /\\ \
X W \ // \ f>\ / A ix•
xx
166°63'
A. COMPLIANCE WITH THE WATER QUALITY DESIGN CRITERIA SET OUT IN SUBDIVISIONS A 1 AND
A 2 OE 9VAC25-870-63 SHALL BE DETERMINED BY UTILIZING THE VIRGINIA RUNOFF REDUCTION
METHOD OR ANOTHER EQUIVALENT METHODOLOGY THAT IS APPROVED BY THE BOARD.
A�TH Op
CALCULATIONS SHOWN ABOVE WERE DETERMINED FROM ACCEPTABLE METHODOLOGY "DEQ VRRM
��
FOR NEW DEVELOPMENT COMPLIANCE SPREADSHEET —VERSION 3.0".
VA
CONCLUSION:
BASED ON NEW DEVELOPMENT ON LOT J1/TMP 86-122 SHOWN HEREON THESE PLANS, WITH A
TOTAL DISTURBED ACREAGE OF 2.50 ACRES, LAND COVER CONSISTING OF 1.70 ACRES OF
DAVID M. ROBINSON
MANAGED TURF, AND 0.80 ACRES OF IMPERVIOUS; A LAND AREA OF 4.35 ACRES OF PROTECTED
Lic. No.
FOREST/OPEN SPACE IS NECESSARY TO SATISFY THE PHOSPHORUS LOAD REDUCTION REQUIRED
�0 56760
FOR THE SITE DEVELOPMENT. A PROPOSED EASEMENT HAS BEEN SHOWN ABOVE, ALONG WITH A
\��k
S/ONAL
SEPARATE EASEMENT PLAT, SHOWING THE ASSOCIATED AREA WITHIN THE PARCEL THAT SHALL BE
PROTECTED IN ACCORDANCE WITH THE VIRGINIA RUNOFF REDUCTION METHOD.
DATE
SCALE
ill � '
CONTOUR
.. INTERVAL
1 FOOT
FILE NUMBER
8236
SHEET
7 F 8
a
ml
WATER QUANTITY ANALYSIS:
TOTAL DRAINAGE AREA TO DOWNSTREAM POINT OF ANALYSIS: 988 ACRES
1 % OF 988 ACRES = 9.88 ACRES
SITE DRAINAGE AREA = 2.50 ACRES
2.50 ACRES < 9.88 ACRES OK
CONCLUSION:
IN ACCORDANCE WITH CHANNEL PROTECTION SECTION B.4.A) OF
9VAC25-870-66 OF VIRGINIA LAW; THE LAND AREA OF THE SITE'S
CONTRIBUTING DRAINAGE AREA APPEARS TO BE LESS THAN 1.0% OF
THE TOTAL WATERSHED AREA DRAINING TO A POINT OF ANALYSIS
DOWNSTREAM IN THE STORMWATER CONVEYANCE SYSTEM.
IN REFERENCE TO FLOOD PROTECTION SECTION C.3.A), THE SITE IS
WITHIN COMPLIANCE SINCE THE CONTRIBUTING DRAINAGE AREA APPEARS
TO BE LESS THAN 1.0% OF THE TOTAL WATERSHED AREA DRAINING TO
A POINT OF ANALYSIS DOWNSTREAM IN THE STORMWATER CONVEYANCE
SYSTEM.
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DAVID M. ROBINSON
Lic, No,
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56760
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F�SS/ONAI- EN
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DATE
August 03, 2013
SCALE
1"®46®'
CONTOUR INTERVAL
2 FEET
FILE NUMBER
6236