HomeMy WebLinkAboutWPO200400108 Plan - VSMP WPO VSMP 2000-05-16GENERAL EROSION AND SEDIMENT CONTROL NOTES
ES-1: Unless otherwise indicated, all vegetative and structural erosion and
sediment control practices will be constructed and maintained according
to minimum standards and specifications of the Virginia Erosion and
Sediment Control Handbook and Virginia Regulati6nsVR 625-02-00
Erosion and Sediment Control Regulations.
ES-2: The plan approving authority must be notified one week prior to the pre -
construction conference, one week prior to the commencement of: lant
disturbing activity, and one week prior to the final inspection.
ES-3: All erosion and sediment control measures are to be placed prilor t(
or as the first step in clearing.
ES-4: A copy of the approved erosion and sediment control plan shall be
maintained on the site at all times.
ES-5: Prior to commencing land disturing activities in areas other than
indicated on these plans (including, but not limited to, off -site
borrow or wasted areas), the contractor shall submit a supplementary
erosion control plan to the owner for review and approval by
the plan approving authority.
ES-6: The contractor is responsible for installation of any additional erosion
control measures necessary to prevent erosion and sedimentation
as determined by the plan approving authority.
ES-7: All disturbed areas are to drain to approved sediment control mEasLres at
all times during land disturbing activities and during site developnent
until final stabilization is achieved.
ES-8: During dewatering operations, water will be pumped into an approved
filtering device.
ES-9: The contractor shall inspect all erosion control measures perdodically and
after each runoff -producing rainfall event. Any necessary repairs or
cleanup to maintain the effectiveness of the erosion control devices shall
be made immediately.
The developer shall reserve the right to install and maintain all erosion
control measures required by this plan regardless of the sale of any lot.
Any on site or off site topsoil locations must be approved by the erosion
control officer during the pre -construction conference and may requirie
a plan amendment.
A satisfactory means of dealing with stumps and other debris must be
determined at the pre -construction conference and may require a plan
amendment.
ORKNAOF SWALE OREM FLOW
TO SW ULM T BASH
—5.SW--2A ASFIIALT,TOP CUMSE A
PAVEMENT
7—T
e
MTER MOTH WK A
V to A(r.REQATE BASE
SIDE ELEVATION
,--EX CURS
VT
7
EOCE Of P
70' MK
000
a ASPHALT PAVED
WA90ACK
Ir
PAVEMENT
P091111E MANAGE
TO.SEDUENT
IRAPPWG DEVICE
MMT WEND FULL WIDTH
OF tticms AM EwEz VIEW
OPERATIONPLAN
12* MaK
2X
4
SLTER CLOTH-/
SECTION A —A
Y-AP 25-4-1A
ROM, A I&MM WATER 4Q6.CF_%bwH1J IS RfaM MM A UMN WASH H09 VA CF XILN (I.5*)
MLW- ano frm 193 h*nLMAI 19f-m—to ald Swkrwg C40hL Wd Va. M PWI iol-1
1 A minimum water tap of 1" must be installed with a minimal 1"
ballcock shutoff valve supplying a wash hose with a diameter of 1_5" for
adequate constant pressure.
2) Sediment from construction entrance shall be directed toward the
eastern existing sediment basin.
TEMPORARY SEDIMENT TRAP
1' VARIABLE
ORIGINAL
H " ELEV. VA"RIA1112 "H" ELEV.
GROUND 0
1.0,
67 CU. YD./ACRE VARIABLE
2: 1 DRY *STORAGE
67 CU. YD./ACRE
(EXCAVATED) 4' MAX.
WET STORAGE 1: 1 FILTER CLOTH ORIGINAL
GROUND
ELEV.
*SEE PLATE 3,13-1 COARSE AGGREGATE CLASS RIPRAP
CROSS SECTION OF OUTLET
CLASS a RIPRAP LENGTH (IN FEET)
6 X DRAINAGE AREA
(IN AC.)
DIVERSION
DIKE
Z
COARSE AGGREGATE
EXCAVATED /
FILTER CLOT
AREA
XX COARSE AGGREGATE SHALL BE VOOT #3, #357 OR #5
OUTLET (PERSPECTIVE VIEW)
SOURCE: VA. DSWC PLA I E. 3.13-2
4.5' min.
SOURCE: VA. DSWC
CH,41q r
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PLATE 3.09-1
GRAVEL CURB INLET.SEDIMENT
FILTER
GRAVEL FILTER X 12'!
RUNOFF WATER r WIRE MESH
FILTERED WATER
DIJ
Yfl 1
00
SEDIMENT
CONCRETE GUTTE 12 CURB INLET
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS
WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE
INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED
AREAS.
* GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE.
SOURCE: VA. DSWC
PLATE 3.07-6
SEDIMENT TRAP NOTES
1 Construction of traps A and B shall be in accordance with the
contours shown on plan sheet 4.
2. For Trap A, the elevation of the top of wet storage and the
bottom of the stone weir is 655.75. The excavated depth of
the wet storage is to be at elevation 653.75.
3. For Trap B,,-the elevation of the top of wet storage and the
bottom of the stone weir is 655.85. The excavated depth of
the wet, storage is to be at elevation 653.85.
4. The dam for traps A and B shall be compacted fill to top elevation 658.0.
The stone weirs shall continue along the external fill slopes of the dam
and a minimum of ten (10) feet beyond the fill slope per Detail A.
2
U / 11L
'"ITY 5TPE4M 6%ROS51,V6
(A.I. 7-5
iJOTE- CP0651A.I& MUST BE ATTEMPTED AT
T14E TIME OF TALE DAY SD 7',1-14T IT
WILL. BE COMPLETED BY rkC EAID
OF T14E DAY.
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TEMPORARY 5TOAJE, C0415T,90C710AI D1rR,4AJCC
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TEMPORARY DIXER,5101V DlKE'
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TEMPORARY 5ED1NcA1;r 5461AJ
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ourLET PROTECT10ki
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STORMWATER MANAGEMENT NOTE
This project is in the Lickinghole Creek Watershed
BMP basin area and will satisfy its water quality
requirement by contributing to the engineering
department's maintenance program. Additionally,
sediment traps A and B will be retrofitted at the end
Of construction to be bioretention basins. Refer to
sheet 6 for retrofit details.
NOTE: THE CONTRACTOR WILL BE RESPONSIBLE
DG FOR DUST CONTROL ON THIS SITE.
Albemarle,
AC;Ounty Enqine66flo
LEGEND _W_,_
Proposed San, Sewer
Proposed Storm Drain
Proposed Water Line
Proposed Water Service, double
Proposed Water Service, single
4 31:0. wl"Moffifficm
SHEET
1
COVER SHEET (NOTES/DETAILS)
SHEET
2
MAP SHOWING ON SITE SOIL TYPES AND VEGETATION
SHEET
3
PHASE I EROSION CONTROL PLAN
SHEET
4
U LT I Nfil ATE EROSION CONTROL PLAN FOR ENTIRE SUBDIVISION
(FOR INFORMATIONAL PURPOSES)
SHEET
5
OUTLET PROTECTION DETAILS
SHEET.
6
STORMWATER MANAGE. & STREAM BUFFER MITIGATION PLAN
SHEET
6A
PLANTING PLAN FOR BIOFILTER AREA
SHEETS
7-10
EROSION CONTROL PLAN - OFFSITE SEWER EXTENSION
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MARCH 13, 2000 1
APRIL 13, 2000
APRIL 20,2000
MAY 5'1 2000
(Sheet 6)
DATE
JAN. 28,2000
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FILE NUMBER
7907
SHEET
4 OF 10
SHEET 5 OF 10
(EROSION CONTROL PLAN)
20' Vegetative
Buffer To Remazr
WEIR NOTE:
Any damage to the weirs for Basins A and B shall be repaired as detailed on the Erosion Control Plan,
Any erosion problems from the weir outfalls to the drainage swale shall require additional measures
until corrected. As an option to the rip rap weir detail shown on Sheet I of the Erosion Control Plan,
grass sodding may be substituted to repair the weirs as well as address any erosion problems below
the weirs.
OUTLET PROTECTION NOTE:
Repair/install outlet protection in accordance with the chart and details on Sheet 5.
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Retrofit Instructions for Converting Traps
A and B into Biofilter Areas
I Permission must bie granted by the watershed manager and erosion
control official (before the conversion process can take place.
2 Remove all accumulated silt and restore bottom to elevation 654.0
8 Bise tip the stibnoii to promote imfiitra�iam.
*3 Apply loam or sanidy loam fill to elevation 655.5 (see cross section detail)
*4 , Apply Sand/Topsoil/organic mix (as specified in cross section detail) to
elevation 656.5.
5 Install ground cover and plant materials per Planting Plan for Biofilter
Areas on Sheet 6A.
Steps 3 and 4 should be done with a small loader or tractor that will not
compact the material significantly while it is being applied. Both the fill
material and sand,/topsoil/organic mix must he inspected by the Erosion
Control Inspector and Watershed Manager prior to placement.
CZ 6,4AJ - OUT
TOO 0r- W1 WK76R71-6H7
5 10FIL TER CAP
50 % 6,401.30% 7ZP -'50/4/ 04
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GRAPHIC SCALE I"=50'
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(E.G. PLAN)
8/10
(E-C. PLAN)
9/10
E.C. PLAN)
10/10
(E.C. PLAN)