HomeMy WebLinkAboutWPO202200044 Plan - VSMP 2023-03-08 (3)SITE DATA
DEVELOPER:
OWNER:
PLAN PREPARER:
TAX MAP PARCEL No:
PARCEL AREA:
ZONING:
USE:
MAX. BUILDING HEIGHT:
SETBACKS:
EXIST IMPERVIOUS AREA:
PROP. IMPERVIOUS AREA:
MAGISTERIAL DISTRICT -
DRAINAGE DISTRICT
BOUNDARY SOURCE. -
TOPOGRAPHY:
FLOODPLAIN:
EROSION &SEDIMENT CONTROL PLAN
SCHWEIKER PARTNERS, LLC
12511 NATHANIEL OAKS DRIVE
OAK HILL, VIRGINIA 20171
SCHWEIKER, RYAN CHRISTOPHER & SARAH JEANNE SCHWEIKER
49 OLAND ST RUCKERSVILLE VA, 22968
ROUDABUSH, GALE & ASSOC., INC.
999 SECOND STREET SE
CHARLOTTESVILLE, VA. 22902
(434)-977-0205
02200-00-00-006A1, 02200-00-00-006A2, 02200-00-00-006A3
23.14 ACRES, 8.22 ACRES, 6.33 ACRES
RURAL AREAS (RA)
RESIDENTIAL, 1 SINGLE FAMILY RESIDENTIAL DWELLING, 1 GARAGE
MAXIMUM STRUCTURE HEIGHT IS 35 FEET
FRONT SIDE REAR
75' (PUBLIC ROADS) 25' 35'
0.43 AC
1.65 AC
RIVANNA DISTRICT
PREDDY CREEK, HUC JR-12
COMMONWEALTH SURVEYING, LLC BY DAVID JORDAN 8111121
TOPOGRAPHY IS LIDAR SUPPLEMENTED BY FIELD SHOTS ALONG THE
DRIVEWAY CORRIDOR, GARAGE AND HOUSE SITE LOCATIONS
THE SUBJECT PROPERTY IS SITUATED WITHIN AN AREA OF MINMAL
FLOOD HAZARD ZONE "X" AND A SPECIAL FLOOD HAZARD AREA
ZONE A AS SHOWN ON COMMUNITY PANEL NO. 51003C0175D WITH
AN EFFECTIVE DATE OF FEBRUARY 4, 2005.
WPO 2022-00044
TM P 22-6A15 6A2 & 6A3
RIVANNA MAGESTERIAL DISTRICT, COUNTY OF ALBEMARLE, VA
i
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PREDDY CREEK PARK
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VICINITY MAP
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APPROVED
by the Albemarle County
Community Development Department
Date 12-13-2022
RIP WP0202200044
SHEET INDEX
SHEET # SHEET TITLE
1 COVER SHEET
2 EXISTING CONDITIONS & DEMOLITION PLAN
3 EROSION & SEDIMENT CONTROL PLAN
4 FINAL DESIGN & CALCULATIONS
5 EROSION & SEDIMENT CONTROL NARRATIVE
6 EROSION & SEDIMENT CONTROL NOTES & DETAILS
APPROVALS
DEPARTMENT
SIGNATURE
DATE
DEPARTMENT OF COMMUNITY DEVELOPMENT
ENGINEERING
INSPECTIONS
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WPO:
2022-00044
FILE:
22.3335
SHEET:
1 OF 6
27C ` •. •
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• • . e SLOPES OVERLAY
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ACCESS EASEMENT TO S \ \�� G� - i --- --- —� • • • \ • • / / 4REA ZONE 4' (4u/rHOL'T BASE S •
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• • / • \ • • 34B - GLENELG LOAM, 2 TO 7 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
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VARIABLE WIDTH PUBLIC RIGHT—OF—WAY PID 02200-00-00-OIOMo l{C• / 1 / J A.
/ • l / / I • \ /o\ 'c I 34D -GLENELG LOAM, 15 TO 25 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
DE 816 PG 283 LOT 8
DB 807 PG 726 /� / / I l • ��j ••J FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
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DB 801 PG 539 _ _ �'�• • \ \ / \ • + + FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
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2022-00044
FILE:
22.3335
SHEET:
2 OF 6
ALBEMARLE COUNTY STEEP
\ \ L SLOPES OVERLAY
100 YEAR FLOODPLAIN
(PER COUNTY GIS)
SOIL LINE
1 \ Rio\ C J ST3 DA = 2.39 AC
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DETAIZ
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SILT FENCE
V A 3.08 CULVERT INLET CIP
60
\ —� A �\ ❑ PROTECTION
\ ` \ CLEAN WATER
DIVERSION CWD
DIVERSION DIKE
SEDIMENTTRAP ST
I 3.1 g OUTLET PROTECTION OP
50 0
SCALE: 1"=50
50 100 150
APPROVED
by the Albemarle County
Community Development Department
Date 12-15-2022
File wpo202200044
3.31
TEMPORARY SEEDING
3.32 PERMENANT SEEDING
PS
3.35
MULCHING
MU
LIMITS OF DISTURBANCE
DRAINAGE DIVIDE---�'T—
*REFERENCE THE LATEST VERSION OF THE VIRGINIA
EROSION AND SEDIMENT CONTROL HANDBOOK (VESCH)
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Lic. No.
55833
PO 12/01 /22
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PRODUCTION:
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DATE:
1 DECEMBER 22
SCALE:
AS SHOWN
WPO:
2022-00044
FILE:
22.3335
SHEET:
3 OF 6
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TYPE 1
RIPRAP DITCH PROTECTION
MNMw TNCIOESS "T"
RIP RAP CLASS
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NOTES:
*M RIP RAP BEDDING MATERIAL
GEOTENTLE FABRIC TO BE PROVIDED LINDER ILL
RIPRAP INSTALLATIONS CLASS N 0.A55 HAND
CLASS (UNLESS OTHERWISE NOTED ON THE
PLANS OR DIRECTED BY THE ENGINEER.
RIPRAP INSTALLATIONS OF CLASS ■SHALL
HAVE AN INTERMEDIATE AGGREGATE SEEDING
LAYER(S) AS SPECIFIED ON THE BINS BASED
ON GEOTECHNCAL RECOMMENDATIONS.
N BEE TYPICAL SECTION SHOWN ON PLANS FOR
SIDE SLOPE. BOTTOM WIDTH AND DEPTH OF
CHANNEL AND RIPRAP THICKNESS.
TYPE II
RIPRAP SLOPE PROTECTION
�VOCrr STANDARD RIP RAP DITCH & SLOPE PROTECTION
PE1f1CATI°"
RAID AND BRIDGESTANDARDS REFERENCE
SHEET 1 OF 1 I REVISION DATE PG-3 zss
10802 VIRGINIA DEPARTMENT OF TRANSPORTATION 414
500 0 500 1000 1500
1 / I SCALE: 1 "=500'
R
e
It
CULVERTA
DA = 21.08 AC
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DAAULVE_RT A C LVERT B
�1.08 AC-- �- IDA - 1.46 AC�
- i
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2-18 HDPE 2.89 T P 2 AREA
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15 PE @ 5.21% x
SEDIMENT PS
TRAP 3 AREA /
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\-101
NOTE: SEDIMENT TRAP AREAS SHALL BE BROUGHT BACK TO EXISTING GRADE WITH PERMANENT SEEDING AND MULCH.
CULVERT
DA (AC)
C
Tc (MIN)
Q10 (CPS)
A
21.08
0.27
22
21.89
B
1.46
0.2
5
1.94
C
1.99
0.3
5
3.97
Invert Elev Dn (ft)
Pipe Length (ft)
Slope (%)
Invert Elev Up (ft)
Rise (in)
Shape
Span (in)
No. Barrels
n-Value
Culvert Type
Culvert Entrance
Coeff. K,M,c,Y,k
Embankment
Top Elevation (ft)
Top Width (ft)
Crest Width (ft)
CULVERT DRAINAGE AREA MAP
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= 434.40
Calculations
= 20.75
Qmin (cfs)
= 21.89
= 2.89
Qmax (cfs)
= 21.89
= 435.00
Tailwater Elev (ft)
= Normal
= 18.0
= Circular
Highlighted
= 18.0
Qtotal (cfs)
= 21.89
= 2
Qpipe (cfs)
= 21.89
= 0.012
Qovertop (cfs)
= 0.00
= Circular Concrete
Veloc Dn (ft/s)
= 9.36
= Groove end projecting (C)
Veloc Up (ft/s)
= 6.88
= 0.0045, 2, 0.0317, 0.69, 0.2
HGL Dn (ft)
= 435.34
HGL Up (ft)
= 436.27
Hw Elev (ft)
= 437.23
= 438.21
Hw/D (ft)
= 1.49
= 12.00
Flow Regime
= Inlet Control
= 50.00
Culvert B
Invert Elev Dn (ft)
= 434.00
Calculations
Pipe Length (ft)
= 21.30
Qmin (cfs)
= 1.94
Slope (%)
= 3.76
Qmax (cfs)
= 1.94
Invert Elev Up (ft)
= 434.80
Tailwater Elev (it)
= Normal
Rise (in)
= 15.0
Shape
= Circular
Highlighted
Span (in)
= 15.0
Qtotal (cfs)
= 1.94
No. Barrels
= 1
Qpipe (cfs)
= 1.94
n-Value
= 0.012
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 7.14
Culvert Entrance
= Square edge w/headwall (C)
Veloc Up (ft/s)
= 3.69
Coeff. K,M,c,Y,k
= 0.0098, 2, 0.0398, 0.67, 0.5
HGL Dn (ft)
= 434.34
HGL Up (ft)
= 435.35
Embankment
Hw Elev (ft)
= 435.57
Top Elevation (ft)
= 436.60
Hw/D (ft)
= 0.61
Top Width (ft)
= 12.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 50.00
Culvert C
Invert Elev Dn (ft)
= 430.00
Calculations
Pipe Length (ft)
= 38.40
Qmin (cfs)
= 3.97
Slope (%)
= 5.21
Qmax (cfs)
= 3.97
Invert Elev Up (ft)
= 432.00
Tailwater Elev (it)
= Normal
Rise (in)
= 15.0
Shape
= Circular
Highlighted
Span (in)
= 15.0
Qtotal (cfs)
= 3.97
No. Barrels
= 1
Qpipe (cfs)
= 3.97
n-Value
= 0.012
Qovertop (cfs)
= 0.00
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 10.11
Culvert Entrance
= Square edge w/headwall (C)
Veloc Up (ft/s)
= 4.75
Coeff. K,M,c,Y,k
= 0.0098, 2, 0.0398, 0.67, 0.5
HGL Dn (ft)
= 430.45
HGL Up (ft)
= 432.81
Embankment
Hw Elev (ft)
= 433.23
Top Elevation (ft)
= 435.30
Hw/D (ft)
= 0.98
Top Width (ft)
= 12.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 50.00
SCHWEIKER RESIDENCE
Earth
ProtectiveLinin
0.9
0.5
0.3
CA
To
12
Q2
Slope
Allow
n select
n=.03
n=.05
n=.015
110 010 DEP Remarks
STA
STA
WS
CA
WS
CA
WS
CA
Inc
Acc
Wit
Vel
Vel
Qn
VEL
DEP
Qn
DEP
SCC 1
13
14
6
0.012
2
0.002
10
0.007
0.022
0.022
5.0
5.5
0.12
0.140
4.0
0.03
2.83
7.07
0.15
0.14
Grass
14
15
6
0.012
2
0.002
10
0.007
0.022
0.043
5.6
5.3
0.23
0.140
4.0
0.03
3.34
6.87
0.30
0.18
Grass
15
16
6
0.012
2
0.002
10
0.007
0.022
0.065
6.1
5.1
0.33
0.140
4.0
0.03
3.67
6.70
0.43
0.21
Grass
16
17
6
0.012
2
0.002
214
0.148
0.162
0.227
6.5
5.0
1.141
0.130
4.0
0.05
0.06
3.31
0.41
6.56
1.49
0.41
EC-2
17
18
6
0.012
2
0.002
554
0.3821
0.397
0.624
7.01
4.9
3.041
1 0.0701
4.0
0.05
0.15
3.35
0.671
1 6.41
4.00
0.67
EC-2
18
19
6
0.012
2
0.002
646
0.446
0.46
1.08$
7.5
4.7
5.15
0.040
4.0
0.05
0.26
3.10
0.90
6.27
6.80
0.90
EC-2
19
19-5
6
0.006
2
0.001
777
0.2681
0.275
1.36
8.11
4.61
6.281
1 0.0201
4.01
0.051
0.31
2.51
0-951
1
1 6.12
8.33
0.95
EC-2
SCC 2
13
14
6
0.012
2
0.002
10
0.007
0.022
0.022
5.0
5.5
0.12
0.140
4.0
0.03
2.83
7.07
0.15
0.14
Grass
141
151
61
0.012
2
0.002
10
0.007
0.022
0.043
5.6
5.3
0.23
0.140
4.0
0.03
3.34
6.87
0.30
0.18
Grass
151
161
61
0.012
2
0.002
10
0.007
0.022
0.065
6.1
5.1
0.33
0.140
4.0
0.03
3.67
6.70
0-431
021
Grass
OVERLAND FLOW
Upper Elevation = 604'
Lower Elevation = 601'
Length = 100'
Slope = 3.0%
To = 13 min
SHALLOW CONCENTRATED
Upper Elevation = 600'
Lower Elevation = 510'
Length = 837'
Slope = 10.7%
837' / 5.3 ft/sec
158 sec
Tc=2.5min
CHANNEL FLOW
Upper Elevation = 510'
Lower Elevation = 436'
H=74'
Length = 1340'
To = 6.5 min
Total Tc = 22 min
CULVERT/CHANNEL A Tc
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SCALE: 1 "=10'
CHANNEL A TRANSITION TO
NATURAL CHANNEL
6" CRUSHER RUN
2" - 1 LAYER
#3 STONE
2.0 12' 2.0
1 0' 2% CROSS SLOPE 10,
2-
DRIVEWAYTYPICAL 7
SECTION
SECTION A -A NATURAL CHANNEL (2-YR FLOW)
Channel Report
Hydrat. Express Extension for Autude" Civil 3M by Autodes2. Inc
Natural Channel
User -defined
Invert Elev (ft)
= 429.00
Slope (%)
= 6.25
N-Value
= 0.100
Calculations
Compute by:
Known Q
Known Q (ds)
= 15.88
(Sta, El, n)HSta, El, n)...
( 0.00, 430.OD}(5.00, I29.o0, 0.100N1100, 429.W, 0.100H14.00, 430.00, 0.100)
Elev (ft)
431.00
430.50
430.00
429.50
429.00
Section
Toesday, Nov292022
Highlighted
Depth (ft)
= 0.73
Q (ds)
= 15.88
Area (sqft)
= 6.51
Velocity (ftls)
= 2.44
Wetted Perim (ft)
= 12.03
Cdt Depth, Yc (it)
= 0.54
Top Width (ft)
= 11.84
EGL (ft)
= 0.82
Channel Report
s1 1 / 11 1
► � 1
SECTION A -A NATURAL CHANNEL (10-YR FLOW)
HydraAoW Express Extension for Autodesk®Civil 30e by Aulodesk, Imo.
Natural Channel
User -defined
Invert Elev (ft)
= 429.00
Slope (%)
= 6.25
N-Value
= 0.100
Calculations
Compute by:
Known Q
Known Q (ds)
= 21.89
(Sta, El, n)-(Sts, El, n)...
(OOQ 430AOH5.00, 429.00, 0.1o0H1 L00, 428.00, DdIWH14.OD, 430.Oq O.10o)
Depth (ft) Elev (ft)
2.00 431.00
1.50 430.50
1.00 430.00
0.50 429.50
0.00
428.50 -0.50
-2 0 2 4 6 8 10 12 14 16
Sta (ft)
429.00
Section
Tuesday, Nov 292022
Highlighted
Depth (ft)
= 0.86
Q (ds)
= 21.89
Area (sqft)
= 8.12
Velocity (ttls)
= 2.70
Wetted Perim (it)
= 13.10
Crit Depth, Yc (ft)
= 0.65
Top Width (ft)
= 12.88
EGL (it)
= 0.97
Depth (ft)
2.00
1.50
1.00
0.50
0.00
428.50 .0.50
.2 0 2 4 6 8 10 12 14 16
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Dustin E. Greene
Lic. No55833
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DATE:
1 DECEMBER 22
SCALE:
AS SHOWN
WPO:
2022-00044
FILE:
22.3335
SHEET:
4 OF 6
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. 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.
PROJECT DESCRIPTION
THIS PROJECT PROPOSES TO BUILD A SINGLE FAMILY RESIDENCE AND GARAGE. THE
DEVELOPMENT WILL INCLUDE A LONG, PRIVATE DRIVEWAY LEADING TO THE RESIDENCE. THE
PRIVATE DRIVEWAY WILL MOSTLY FOLLOW A 15' WIDE ACCESS ROAD FOR THE EDWARDS
FAMILY CEMETERY BUT WILL DEVIATE AT THE BOTTOM THE VALLEY IN ORDER TO CREATE A
BETTER CROSSING FOR THE CHANNEL AND BUILDABLE AREA FOR THE GARAGE. THE LIMITS
OF DISTURBANCE FOR THE DEVELOPMENT WILL BE APPROXIMATELY 2.75 ACRES.
EXISTING SITE CONDITIONS
THE CURRENT CONDITIONS OF THIS SITE CONSIST OF GENTLE SLOPES FALLING TO STEEPER
SLOPES IN A SOUTHWEST TO NORTHEAST DIRECTION FROM BURNLEY STATION ROAD TO
PREDDY CREEK. THREE LARGER SWALES CROSS THE PROPERTY AND FLOW INTO A WATER
PROTECTION ORDINANCE BUFFER AND INTO PREDDY CREEK. THERE ARE STEEP SLOPES THAT
ARE BEING AVOIDED WITH THE DRIVEWAY, GARAGE AND HOUSE CONSTRUCTION LIMITS OF
DISTURBANCE.
ADJACENT AREAS
THE SITE IS BOUND BY BURNLEY STATION ROAD TO THE SOUTHWEST. THE LAND TO THE
NORTHWEST OF THE SITE IS BOUND BY PREDDY CREEK.THE SITE IS BOUND TO THE
NORTHWEST BY TMP 22-2C AND TO THE SOUTHEAST BY TMP22-6C AND 22-10
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 A AN AREA APPROVED BY THE
COUNTY OF ALBEMARLE COMMUNITY DEVELOPMENT DEPARTMENT.
SOILS
34B - GLENELG LOAM, 2 TO 7 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
34C - GLENELG LOAM, 7 TO 15 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
34D - GLENELG LOAM, 15 TO 25 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
34E - GLENELG LOAM, 25 TO 45 PERCENT SLOPES, MORE THAN 80 INCHES TO RESTRICTIVE
FEATURES, WELL DRAINED, HYDROLOGIC SOIL GROUP: B
39C - HAZEL LOAM, 7 TO 15 PERCENT SLOPES, 20 TO 40 INCHES TO RESTRICTIVE FEATURES,
EXCESSIVELY DRAINED, HYDROLOGIC SOIL GROUP: B
39D - HAZEL LOAM, 15 TO 25 PERCENT SLOPES, 20 TO 40 INCHES TO RESTRICTIVE FEATURES,
EXCESSIVELY DRAINED, HYDROLOGIC SOIL GROUP: B
39E - HAZEL LOAM, 25 TO 45 PERCENT SLOPES, 20 TO 40 INCHES TO RESTRICTIVE FEATURES,
EXCESSIVELY DRAINED, HYDROLOGIC SOIL GROUP: B
95 - HATBORO SILT LOAM, 0 TO 2 PERCENT SLOPES, OCCASIONALLY FLOODED, MORE THAN 80
INCHES TO RESTRICTIVE FEATURES, POORLY DRAINED, HYDROLOGIC SOIL GROUP: B/D
*SOIL DATA TAKEN FROM UNITED STATES DEPARTMENT OF AGRICULTURE NATURAL
RESOURCES CONSERVATION SCIENCE CUSTOM SOIL RESOURCE REPORT (INCLUDED IN
SUBMITTAL). DELINEATION OF SOILS SHOWN ON SHEET 2.
CRITICAL AREAS
CRITICAL AREAS WITHIN THE DEVELOPMENT INCLUDE THE STREAM BUFFER AND STREAM
(PREDDY CREEK). STEEP SLOPES AS IDENTIFIED ON SHEET 2.
STRUCTURAL PRACTICES
1. THE ESC IMPROVEMENTS CAN ADEQUATELY CONTROL EROSION AND OFFSITE
SEDIMENTATION USING A CONSTRUCTION ENTRANCE, DIVERSIONS, SILT FENCE,
OUTLET PROTECTION AND CULVERT INLET PROTECTION; LOCALIZED SEDIMENT TRAPS
ARE INSTALLED INITIALLY TO CAPTURE RUNOFF. GRADING OPERATIONS INVOLVE CUT
AND FILL OPERATIONS IN PREPARATION OF THE DRIVEWAY AND BUILDING PAD SITES.
INSTALLATION OF THE SILT FENCE AND SEDIMENT TRAPS SHALL OCCUR AS THE FIRST
MAJOR STEP IN CONSTRUCTION AND PRIOR TO ANY ADDITIONAL GRADING OR ADDED
EARTH MOVING OPERATIONS. ANY AND ALL SEDIMENT AND EROSION SHALL BE
MINIMIZED UNTIL THE FACILITIES ARE FULLY OPERATIONAL. SHOULD THE CONTRACTOR
ENCOUNTER AN OVER -BURDEN OF BEDROCK DURING GRADING OPERATIONS CONSULT
WITH ENGINEER AND OWNER TO INVESTIGATE DESIGN ALTERNATIVES.
VEGETATIVE PRACTICES
1. 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.
2. 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.
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. TEMPORARY SEEDING OR OTHER STABILIZATION METHODS, SUCH AS BASE AGGREGATE
WILL FOLLOW IMMEDIATELY AFTER REACHING FINAL GRADES.
4. 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.
5. THE JOB SUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND
MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL PRACTICES.
6. AFTER BEING NOTIFIED BY THE EROSION AND SEDIMENT CONTROL ADMINISTRATOR,
THE TEMPORARY EROSION AND SEDIMENT CONTROLS CAN BE CLEANED UP OR
REMOVED.
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
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:
1. 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. IF A WASH -RACK IS INSTALLED, THEN
PROPER CONTAINMENT OF THE WASH -RACK IS REQUIRED.
2. SILT FENCE SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST
DAILY DURING PROLONGED RAINFALL. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR
OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND UNDERCUTTING. SHOULD
THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE
END OF THE EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE
FABRIC SHALL BE REPLACED PROMPTLY. SEDIMENT DEPOSITS SHOULD BE REMOVED
AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN DEPOSITS REACH
APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER. ANY SEDIMENT DEPOSITS
REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE
DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED, AND SEEDED.
3. 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. THE
PRE -CONSTRUCTION MEETING WILL BE HELD WITH THE COUNTY E&S INSPECTOR AND
CONTRACTOR PRIOR TO ANY LAND DISTURBANCE.
2. CONSTRUCT A CONSTRUCTION ENTRANCE ALONG BURNLEY STATION ROAD. ENTRANCE
TO BE INSTALLED ADEQUATELY PER CONSTRUCTION ENTRANCE DETAIL.
3. CLEARLY MARK LIMITS OF DISTURBANCE WITH BRIGHT -COLORED FLAGGING.
4. ALL PERIMETER CONTROLS MUST BE MADE FUNCTIONAL PRIOR TO ANY UPSLOPE LAND
DISTURBANCE THAT TAKES PLACE.
5. SILT FENCE, TRAPS AND DIVERSIONS SHALL BE INSTALLED AS SHOWN ON THE EROSION
AND SEDIMENT CONTROL PLAN.
4. BEFORE COMMENCING CONSTRUCTION OPERATIONS, THE CONTRACTOR SHALL
COORDINATE INSPECTIONS, AS REQUIRED BY THE COUNTY OF ALBEMARLE.
5. GRADE IN DRIVEWAY, CULVERTS AND BUILDING SITE PADS.
5.1. THE LAND DISTURBANCE SHALL BE RESTRICTED TO THE LIMITS OF THE
DISTURBANCE AS SHOWN IN THE EROSION CONTROL PLANS.
6. DENUDED AREAS SHALL DRAIN TO AN APPROVED EROSION CONTROL MEASURE AT ALL
TIMES DURING CONSTRUCTION.
7. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO ALL DENUDED
AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE
SITE. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO
DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT FOR
LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT
ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
8. LIME, FERTILIZE AND APPLY TEMPORARY OR PERMANENT SEEDING TO ALL DENUDED
AREAS IMMEDIATELY AFTER ACHIEVING FINAL GRADES.
9. 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.
2. CONTRACTOR SHALL ESTABLISH A STABILIZED SITE, AND NOT ALLOW ANY SEDIMENT TO
EXIT THE PROJECT LIMITS.
3. 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.
4. CONTRACTOR TO PROTECT STOCKPILE AREAS WITH SILT FENCE.
5. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT
OTHERWISE PERMANENTLY STABILIZED. PERMANENT VEGETATION SHALL NOT BE
CONSIDERED ESTABLISHED UNTIL GROUND COVER IS ACHIEVED THAT IS UNIFORM,
MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION.
6. CONTRACTOR SHALL ESTABLISH A VEGETATIVE COVER ON ALL DENUDED AREAS.
7. 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.
8. CONTRACTOR SHALL ESTABLISH THE PERIMETER CONTROLS OF SILT FENCE AS THE
FIRST STEP OF THE LANDS DISTURBANCE FOR THIS PROJECT.
9. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS
DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
10. CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AFTER EACH RAINFALL
EVENT.
11. SEDIMENT TRAPS AND SEDIMENT BASINS SHALL BE DESIGNED AND CONSTRUCTED
BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN.
12. THERE ARE NO PROPOSED SEDIMENT BASINS.
12.1. 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.
12.2. 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.
13. 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.
14. 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.
15. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER
PROTECTION SHALL BE PROVIDED.CONTRACTOR TO NOTIFY ENGINEER AND COUNTY
EROSION CONTROL INSPECTOR.
16. 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.
17. 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.
18. 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.
19. 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.
20. 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.
21. 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.
22. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE
FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE CRITERIA:
22.1. NO MORE THAN 500 LINEAR FEET OF TRENCH MAY BE OPENED AT ONE TIME.
22.2. EXCAVATED MATERIAL SHALL BE PLACED ON THE UPHILL SIDE OF TRENCHES.
22.3. 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.
22.4. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED
IN ORDER TO MINIMIZE EROSION AND PROMOTE STABILIZATION.
22.5. RE -STABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THIS
CHAPTER.
22.6. APPLICABLE SAFETY REQUIREMENTS SHALL BE COMPLIED WITH.CONTRACTOR TO
ADHERE TO THE APPLICABLE STANDARD FOR PRIVATE AND PUBLIC UTILITY
INSTALLATION.
23. 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.
24. 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.
25. 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(B)(1)(B).
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Dustin E. Greene
Lic. No.
4
Po 55833
12101 /22 ���
F'SSIONAL E�G�
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DRAFTER:
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DESIGNER:
DEG
PRODUCTION:
ZQD
DATE:
1 DECEMBER 22
SCALE:
N/A
WPO:
2022-00044
FILE:
22.3335
SHEET:
5 OF 6
cE CONSTRUCTION ENTRANCE OSF SILT FENCE PERMANENT SEEDING MIXTURES FOR sT SEDIMENT TRAP
STONE CONSTRUCTION ENTRANCE CONSTRUCTION OF A SILT FENCE PS THE PIEDMONT AREA TEMPORARY SEDIMENT TRAP 2
(WITHOUT WIRE SUPPORT) U
1. SET THE STAKES. 2. EXCAVATE A 4"X 4" TRENCH TABLE 25 TOTAL LBS. PER ACRE O
70' MIN. EXISTING UPSLOPE ALONG THE LINE OF 1 Z
PAVEMENT STAKES. MINIMUM CARE LAWN -COMMERCIAL OR RESIDENTIAL 175-200 LBS. O_ N
A .3' ORIGINAL VARIABLE 0 O
s.1 _ 6 MA . KENTUCKY 31 OR TURF -TYPE TALL FESCUE 95-100% ELEV.GROU`� m0 w ui C uI O
/ - IMPROVED PERENNIAL RYE GRASS 0-5% c = 7B9.o 1.0 � IL Z 0) Q o
FILTER CLOTH /� �_ '
6' MIN. p MOUNTABLE BERM (OPTIONAL) �j - KENTUCKY BLUEGRASS 0-5% 87 CU. YD./ACRE O ro n ro
l� _ / i I ti N VARIABLE, W C0 Q 0 J W m
SIDE ELEVATION J� IIII HIGH MAINTENANCE LAWN 200-250 LBS. Q Z O > (i CI
7"mEXISTING CROLxOI j��i� / rJ - KENTUCKY 31 OR TURF -TYPE TALL FESCUE 100% B - 7e2.o Q� Z W IWLI Lu 0
j67 CU. YD./ACRE � (n r- Z LL
r -
70' MIN. FLOW
GENERAL SLOPE (3:1 OR LESS) (EXCAVATED) 4 mAx' M� w Z 0) tr a
6 WASHRACK 10, MIN. III 1 III 1 A= 789.0 GROUND F�1 O j a I
FlLTER CLOTH ORIGINAL LL Z
(OPTIONAL) �_ 4" - KENTUCKY 31 FESCUE 128 LBS. ELEV. C/1 OL w U
RED TOP GRASS 2 LBS. SEE PLATE 3.13-1 COARSE AGGREGATE"* CLASS I RIPRAP Q
3. STAPLE FILTER MATERIAL 4. HACKFILL AND COMPACT
1a• MIN: - SEASONAL NURSE CROP` 20 LBS.
I~ E%ISTING TO STAKES AND EXTEND THE EXCAVATED SOIL.
PAVEMENT IT INTO THE TRENCH. LOW -MAINTENANCE SLOPE (STEEPER THAN 3:1) CROSS SECTION OF OUTLET:V12'
KENTUCKY 31 FESCUE 108 LBS.
.� POSITIVE DRAINAGE 1D' MIN. RED TOP GRASS 2 LBS. 0
COURSE AGGREGATE B TO SE DINE DE -t;, - SEASONAL NURSE CROP` 2O LBS. CL455 I RIPRAP 6 X DRAINAGE AREA I-F
TRAPPING DEVICE /j /• LENGTH (IN FEET) _
OMUST EXTEND FULL WIDTH F INGRESS AND EGRESS / 1111 / IIII - CROWN VETCH" 20 LBS. (IN AC-)
OPERATION PLAN VIEW �r� V TOTAL 150 LBS. _� DIVERSION
DIKE
12' MIN. _ = FLOW �_ `USE SEASONAL NURSE CROP IN ACCORDANCE WITH SEEDING DATES AS STATED
Y MIN. BELOW:
_
III -111
Y MIN. FEBRUARY 16TH THROUGH APRIL 30TH............ ANNUAL RYE
SHEET FLOW INSTALLATION
(PERSPECTIVE VIEW) MAY 1ST THROUGH AUGUST 15TH ................ FOXTAIL MILLET
FILTER CLOTH AUGUST 16TH THROUGH OCTOBER 31ST........... ANNUAL RYE
SECTION A -A i NOVEMBER 1ST THROUGH FEBRUARY 15TH ........ANNUAL RYE
A 3wx A \\\ "` SUBSTITUTE SERICEA LESPEDEZA FOR CROWNVETCH EAST OF FARMVILLE, VA ' / coARSE AGGREGATE
FLOW I4
B (MAY THROUGH SEPTEMBER USE HULLED SERICEA, ALL OTHER PERIODS, USE EXCAVATED
UNHULLED SERICEA.) IF FLATPEA IS USED IN LIEU OF CROWNVETCH, INCREASE AREA / nLTER CLOTH
� \ �� RATE TO 30 LBS./ACRE. ALL LEGUME SEED MUST BE PROPERLY INNOCULATED. ��� ro
WEEPING LOVEGRASS MAY BE ADDED TO ANY SLOPE OR LOW MAINTENANCE MIX Z w
DURING WARMER SEEDING PERIODS; ADD 10- 20 LBS./ACRE IN MIXES. "COARSE AGGREGATE SHALL BE VDOT #3, #357 OR #5 O
REINFORCED CONCRETE DRAM SPACE POINTS A SHOULD BE HIGHER THAN POINT B. o_ O
SECTION B-B DRAINAGEWAY INSTALLATION PS PERMANENT SEEDING FERTILIZATION OUTLET (PERSPECTIVE VIEW) 0
(FRONT ELEVATION) AND MAINTENANCE
o Z
TEMPORARY SEDIMENT TRAP CALCULATIONS o
DD TEMPORARY DIVERSION DIKE TABLE 24 WET WET DRY DRY Z O
O CULVERT INLET PROTECTION H Z WEIR DRAINAGE ZO
C P Maintenance Fertilization for Permanent Seedlings No. A B C (ft.) (ft.) LENGTH AREA (REQ.) (PRO. (REQ.) (PRO. 0
Use Soil Test Recommendation or Rates Shown Below (ft.) (Acres) (CY) (CY) (CY) (CY)
SILT
FENCE
n 7� Seeding Mixture Formulation Lbs. per Lbs. per Time Mowing tr
Compacted Soil SILT FENCli CULVERT INLET Acre 1000 sf 1 432 436 438 3.0 1.5 6.0 0.99 67 70 67 75
Tall fescue makes 10-10-10 500 11.5 Yearly, or as `Not closer than 3" if
18" PR 0 TE C TION up 70% or more or 400 9.2 needed fall occasional mowing is 2 432 436 438 3.0 1.5 9.0 1.37 92 105 92 101
of cover. 30-10-10 desired.
MIN Flow 3 415 418 420 3.0 1.5 15.0 2.39 161 172 161 163
................................
ENDWALL Crownvetch Spring the year Do not mow crownvetch
IIIIIIIIIIIIIIIIIIIIIIII-III Irdsfoot trefoil D-20 D 4DD 9.2
Service Ies edeza following m w
p establishment o
B and every 4 5
�i---T years thereafter. a
}� 4.5' MIN TOE OF FILL .ii,____ CULVERT Fairly uniform Fall the year Not required. not closer ui I a N
ti stand of Tall following than 4" if occasional Note: I (e 8 I Entrances shall be 12 ft wide and 0
ewD CLEAN WATER DIVERSION DIKE I I - Tescue &Service 5-10-10 500 11.5 establish- ment mowing is desired, and See VDOT Road and Bridge Standards, I l suds e. smoothly into the roadway
_ --{ Iespedeza, or and every 4-5 then in fall after seed Std: PE-1 for cuUfill details I surface. Driveway entrance pavement
I i All entrance grades shall start back of shall extend to the right of way line. p
Birdsfoot Trefoil. years thereafter. has matured. g l e+ I When an existing street is re�evela ed Z
I the shoulder line. 9 P
Compacted Soil ' 80 I an modification n existing driveway
P If drain Is necessa the ditch line d of a
I ' Weeping Spring the year Not required. not closer � necessary. I e � I entrance is required, the entrance
Filter Fabric p g may be moved back to provide 9 inches M-
___ _________ ____ Lovegrass & following than 4" if occasional I o pavement shall the
extended st the right DRAFTER: DEG
1 8„------------r-------,-- 9 (min.} cover over pipe, c
�_- of way line or the extent of dstufiance
Service Iespedeza 5-10-10 500 11.5 establishment mowing is desired, and l W 3 I to the existing driveway. DESIGNER: DEG
MIN Clean Water Flow fairly uniform plant and every 3-4 fall after sericea has I E I PRODUCTION: 70D
TOEOFFAl distribution years thereafter. matured. I I _
IIIIIIIIIIIIIIIIIIIIIIII-III September, 30 Mow no closer than 2"PLTx of
SILT FENCE 20-10-10 250 5.8 3 E G
DISTANCE IS 6' MINIMUM IF FLOW Red & chewings for red fescue and K 12 FT. � � r
IS TOWARD EMBANKMENT fescue, KentUC days later V Pipe culvert ff IT 1'
9 December, May bluegrass;
lue rafor and cl .ser Surfaced
4.5' MIN bluegrass, hard y if necessary Soo r
FLOW 20-10-10 100 2.3 20-June-30, if 1t3 Ft. o, e O
fescue mixture:
needed. Ditch flow line Graded _� 7
� * R=20' Min. � � � �
Dustin E. Greene
OPTIONAL STONE COMBINATION TS TEMPORARY SEEDING MIXTURES FOR _ _-_� '� _- _ _ � 55833 4,
v m - P0F 12/01 /22
TYPICAL TREATMENT- > THE PIEDMONT AREA Shoulder oa �SSLONAL E'G
(SOIL STABILIZATION BLANKET) 6 w
TABLE 26
INSTALLATION CRITERIA Roadway Pavement
TEMPORARY SEEDINGS BY RATES, DEPTHS, AND DATES Edge of Roadway
Planting - Roadway Pavement J
FLOW _ ti' 2.5' Seeding Rate depth ill Seeding zones 21 and Seeding Date
ANCHOR SLOT NOTES Species} Per Lbs/1000 7aand 7b fib 6aand 5b FIGURE 9 -PRIVATE ENTRANCE DETAIL' W Z Q
acre Sq. ft (Inches) 2/1- 5/1- 8/15- 3/1- 5/1- 8/15- 3/15- 6/1- 8/1-
APPROXIMATELY 200 STAPLES REQUIRED Q LU
PER 100 SO. YDS. OF MATERIAL ROLL 4/30 8/14 11130 4/30 8/14 11/15 5131 7/31 10/31
ANCHOR SLOTS, JUNCTION SLOTS & OP J 0
CHECK SLOTS TO BE BURIED 6" TO 12". Choose One: BY BY BY OUTLET PROTECTION z
CLASS I RIPRAP Barley 2.5 bu. 2.80 1-2 X - 10/15 x - 10/15 X - 10/106
12" MAX. 4:1 OR FLATTER w TO VDOT
/3, REPLACE SI OR y5 COARSE AGGREGATE Oats 3 bu. 2.21 1-2 X - - x - - x - -
6" MAX. STEEPER THAN 4:1 TO ELOC SILT FENCE IN " EXPEHORSCTED
WNEN I I I J
_ I � HIGH VELOCITY OF FLOW IS EXPECTED Rye (4) 2.5 bU. 3.22 1-2 X X X X X X I I I CO
JUNCTION SLOT O
EDGE AND END JOINTS I I I I I I I I I A
CHECK SLOT* TO BE SNUGLY ABUTTED N,I�
(JUTE MESH WILL HAVE O
TERMINAL FOLD STAPLED LAP JOINT IN I ' A n z Z
LIEU OF EDGE JOINT) v J
LAP JOINT 2" MIN. a e or O
TAMP FIRMLY (JUTE MESH ONLY) I I I Rye PIUS 1501bs. 3.45 1 X X 10/15 X X 10/15 x X 10/1 I I I O
ANCHOR SLOT J■- I FoMail x x x x x x x x X I I I
5' MAX. 4:1 OR FLATTER I mil I U===PIPE OUTLET TO
3• MAX. STEEPER THAN 4:1 I I Weeping _
albs. 0.09 1/4-1/2 x x x WELL-DEFINED
z' T I lovegrass�6j CHANNEL z z
I
T 6" To 12" I I Annual PLAN VIEW I � W 0 j ryegrasS 50lbs. 1.15 1/4-1/2 X 11/1 X 11/1 X 8115 1 :�i u
I
II I II II I I I I I❑s115 1/2 X X ZCHECK SLOT Millet (7) 50 lbd5O LLI LZL_
2" TAMP CHECK SLOT 1" TO 2" I (1) Applicable on slopes of 3:1 or flatter U)
FIRMLY (2) Refer to figure A -Adopted from USDA, AIRS Miscellaneous Publication #1475, January 1990 O%
VAR. VAR. (3) Between fall and spring seeding dates, use mulch only if ground is frozen and reseed when thawed d = I I I 0.5 Q
PLAN VIEW (4) May be used as a nurse crop for late fall/early winter permanent seedings, add 56 Ibs/ac. to the permanent LJJ
6" TO 12 6" TO 8' MIN. SCC STORMWATER CONVEYANCE CHANNEL seeding mixture SECTION A -A T O �
STAPLING DIAGRAM (4) Maryland State Highway Administration Temporary Seed Mix L-
(5) May be used as a nurse crop for mid -summer permanent seedings. Add 2 lbs/ac to permanent seed mix. FILTER CLOTH KEY IN 6"-9"; 06
`CHECK SLOTS AT MIN.
STAPLE FORMED FROM NO.11 STEEL WIRE. 50' C-C INTERVALS; (6) May be used as a nurse crop for mid -summer permanent seedlings. Add 10 Ibs/ac. to the permanent seeding RECOMMENDED FOR T
a" STAPLE MIN. LENGTH FOR SANDY SOIL. NOT REO.'D WITH ALL mix. y O Z
6" STAPLE MIN. LENGTH FOR OTHER SOIL ^COMBINATION"BLANKETS TYPICAL WATER WAY ENTIRE PERIMETER
APRON LINING SHALL BE � O
JUNCTION SLOT TAMP TERMINAL FOLD CROSS -SECTIONS LLJ O
FIRMLY
2^ �� � 6• To 12^ � Outlet Protection Table
12• I TAMP FIRMLYi� 4" 2" COMPACTED SOII. CE
Pipe Upstream Stone
Discharge Aron Downstream W
Culvert Diameter 9 P Apron Width Depth one Si
(in) (cfs) Length (ft) (ft) Apron Width (ft) (in) Stone Size
_ I -I - C 15 3.97 8 4 6 12
A 2-18 21.89 20 9 top of channel 18 Class 1 DATE: 1 DECEMBER 22
is I B 15 1.94 8 4 6 12 Class lA SCA E 2022-00044
IIII IIIII IIIII0 I
IIIIII Class 1A
SOURCE: VDOT ROAD AND BRIDGE STANDARDS PLATE: 3.36-2 TYPICAL CONCRETE LINED DITCH TYPICAL GRASS LINED DITCH FILE: 22.3335
TYPICAL VEE CROSS -SECTIONS
(1) ALL LINING SHALL BE GRASS UNLESS OTHERWISE SPECIFIED ON THE PLAN SET6 SHEET: OF 6