HomeMy WebLinkAboutWPO200500030 Plan - Stormwater Stormwater Management Plan 2005-05-16Soutbwind Estates MAINTENANCE
Erosion/Sediment Control Narrative In general, all erosion and sedl.ment control measures will be cbecked weekly and after each
March 21, 2005 significant rainfall. The following Items will be cbecked in Particular:
PROJECT DESCRIPTION 1) The sediment traps and basins will be cleaned and maintained according to the VESCH.
The project consists of aonstruction of a road for a rural, large lot subdivision. The total 2) All gravel outlets will be checked regularly for sediment buildup which will prevent
disturbance for this site is 3.6 acres. drainage. If the gravel is clogged by sediment, it shall be removed and cleaned or
EXISTING SITE CONDITIONS
replaced.
Oppen rolling field that drains to streams on either side of the proposed roadway.
3) Silt fence will be checked regularly for undermining or deterioration of the fabric and
AbJACENT PROPERTY
The road enters the project from state route 20 to the west. The rest of the pro arty is
by 35-17, 35-16, 35-25A, 35-25, 35-222, 35-1613 8 35-26b.
repaired as required. Sediment shall be removed when the level of sediment deposition
reaches half way to the top o)f the barrier.
surrounded rural parcels:
4) All seeded areas will be, checked regularly to see that a good stand is maintained. Areas
OFFSITE AREAS
should be, fertilized and reseeded as needed.
No off -site areas will be disturbed.
MS-1 Stabilization of Denuded Areas and Soil Stockpiles
SOILS
The entrance road begins in Cbewolca Silt Loam (16) then runs through
Permanent or temporary soil stabilization must be opprod to denuded areas within seven days
after final grade is reached on any portion of the site. Temporary soil stabilization shall
Catoctin Silt Loam (12D), Meyerville, Silt Loam (552A Fauquir Silt Loam (252)),
be applied within seven days to denuded areas that may not be at final grade, but will
Meersville Silt Loam (58C). Catoctin Very Stoney Silt Loam (13C) and cul-de-saes in
RobYum Clay Loam (71D).
remain dormant (undisturbed) fior longer than 30 days. Permanent stabilization shall be
applied to areas that are to be left dormant for more than one year.
Soil stabilization refers to meiasure wbich protect soil from the erosive forces of raindrop
CRITICAL EROSION AREAS.
impact and flowing water. Applicable practices include vegetative establishment, mulching,
There are no critical erosion areas.
and the early application of gravel base on areas to be paved. Soil stabilization measures
should be selected to be appropriate for the time of year, site conditions and estimated
EROSION AND SEDIMENT CONTROL MEASURES
duration of use.
Unless otherwise indicated, all vegetative and structural erosion and sediment control
MS-4 Timing and stabilization, of Sediment Trapping Measures
practices will be constructed and maintained according to minimum standards and
Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to
specifications of the Virginia Erosion and Sediment Control Handbook (VESCH).
troy sediment shall be constructed as a first step in any land -disturbing activity and shall
STRUCTURAL PRACTICES
be made functional before up -:slope land disturbance takes place.
1. Construction Entrance- 3.02
MS- 5 Stabilization Measures
A temporary paved construction entrance shall be installed at the beginning of the project.
Stabilization measures shall be op lied to earthen structures such as dams, dikes and
2. Silt Fence- 3.05
diversions immediately after installation.
A temporary sediment barrier consisting of a synthetic filter fabric stretched across and
MS- 17 Vehicle Access
attached to supporting posts and entrenched.
Where construction vehicle acicess routes intersect paved public roads, provisions shall be,
3. Culvert Inlet Protection- 3.06
made to minimize the transporlt of sediment by (vehicular) tracking onto the paved surface.
A temporary sediment filter located at the inlet to culverts.
Where sediment is transported onto a public road surface, the road shall be cleaned
4. Temporary Sediment Trap - 3.13
A small ponding area, formed by construction on earthen embankment with a stone outlet
thoroughly at the end of each day. Sediment shall be removed from the roads by shoveling or
sweeping and transported to ai sediment control disposal area. Street washing shall be,
across a drainage swole.
5. Temporary Sediment 2)asin - 3.14
P /
allowed only after sediment is removed in this manner. This provision shall apply to
lots
A temporary barrier or dam with a controlled stormwater release structure formed by
individual subdivision as well as to larger land disturbing activities.
MS-18 Disposition of Temporary Measures
constructing an embankment of compacted soil across a drainageway. The purpose is to detain
All temporary erosion and sediment control measures shall be removed within 30 days after
sediment -laden runoff from disturbed areas in .wet. and .dry. storage long enough for the
final site stabilization or after the temporary measures are no longer needed, unless
majority of the sediment to settle out.
otherwise authorized by the loical program administrator. Trapped sediment and the disturbed
VEGETATIVE PRACTICES
1. Temporary Seeding - 3.31
soil areas resulting from the disposition of temporary measures shall be permanently
to
Establishment of temporary vegetative cover on disturbed areas by seeding with apprapriote
rapidly growing plants on sites that will not be brought to final grade for pperiods of 30
stabilized prevent further erosion and sedimentation.
days to one year. German Millet at 60 lb./ac., Weeping Lovegrass at 3 )b./ac., Korean
ANTI VORTEX DEVICE DESIGN
Lespedeza at 20 lb./ac.
Temporary seeding shall be, fertilized. Fertilizer shall be, applied at a rate of 600
Ibs/acre of 10-ZO-10 according to the handbook. The builder may save considerable funds by
having the soil tested by VA TECH (kits are available at the extension office and the test
PRESSURE RELIEF
costs $6.00).
HOLES 1/2" OIA.
2. Mulch - 3.35
O O
O
Organic mulch shall be used in conjunction with seeding operations and shall be, applied at
the rate of 2 tons/acre.
A
A
3. Dust Control- 3.39
TOP IS 14 GAGE CORRUGATED
Dust control Measures shall be utilized throughout this site when necessary. Typical
O
O
METAL OR 1/6" STEEL PLATE.
temporary measures include but are not limited to, irrigation, temporary seeding barriers.
PRESSURE RELIEF HOLES MAY
These measures will aid in the prevention of harmful airborne substances as well the effects
BE OMMITED, IF ENDS OF
of wind erosion.
CORRUGATIONS ARE LEFT FULLY
MANAGEMENT STRATEGIES
O
O
O
O
OPEN WHEN THE TOP IS
ATTACHED.
1. Construction should be sequenced so that grading operations can begin and and as quickly
as possible. P
2. Sediment trapping measures shall be installed as a first step in grading and shall be
CYLINDER IS 16 GAGE CORRU-
GATED METAL PIPE OR FABRI-
seeded and mulobed immediately following installation.
PLAN VIEW
CATED FROM 1/6"
3. The fob superintendent shall be responsible for the installation and maintenance of all
STEEL PLATE.
erosion and sediment control practices.
4. Temporary seeding or other stabilization will follow immediately after grading.-t8'
WEB
Eo
NOTES:
TACKWELD
-TRASH RACK EMERGENCY SPILLWAY
1 F�
ENGINEERED
SELECTED FILL
PLACED IN LAYERS
AND COMPACTED
-1 I I1 I I III=1 I
w
EMBANKMENT
STABILIZED
WITH VEGETATION
FREEBOARD
1 FT MIN
SPILLWAY
BARREL
STABILIZED
1_ OUTLET,
35'21'CMID
-III I
„�IIIIIIII ill�Illlllllll'�IIIIIIIII I1111IIIIIIII�1.
5'xIB" CONCRETE BASE 2 4x4' ANTI -SEEP COLLARS
SEDIMENT BASIN
5. Areas whicb are not to be disturbed will be clearly marked by flags, signs, etc. ALL AROUND > 1. THE CYLINDER MUST BE
PERMANENT STA&LIZATION 15 FIRMLY FASTENED TO THE
All areas disturbed by construction will be stabilized with permanent seeding Immediately TOP of THE RISER.
following finish grading. Seeding will be done with Kentucky 31 Tall Fescue according to 8" MIN.
Std. 9 Spec. 3.32 of The Virginia Erosion L Sediment Control Handbook. 5-20-10 fertilizer 2. SUPPORT BARS ARE WELDED
shall be, applied at the rate of 1000 Ib/ac and lime at 2 tons/ac. Permanently seeded areas #6 X 12" TO THE TOP OF THE RISER
SPACER BAR OR ATTACHED BY STRAPS
shall be protected during establishment with straw mulcb (2 tons/ac). ITYPICAL} SUPPORT BAR SIZE BOLTED TO THE TOP
STORMWATER MANAGEMENT of RISER.
This is a rural subdivision with negligible change in stormwater peak flows. The small 30" #8 Rebar
amount of impervious area relative to the size of the parcel coupled with the fact that the
site is an other rural area' mean no permanent water quality controls are required.
Silt Trap #3 SECTION A -A ISOMETRIC
Drainage Area (ac): 0.23
Wet Storage Req (cy): 15.41
Dry Storage Req (cy): 15.41 i Silt Trap #2
Total Storage Req (cy): 30.82 \ Drainage Area (ac): 2.13
Elev Side 1 Side 2 Area Vol Vol - Wet Storage Req (cy): 142.71
\ S Dry Storage Req (cy): 142.71
(sf) (Cf) (cy) - - - - - - _ - \\ gyp\ Total Storage Req (cy) : 2B5.42
Low Point 470.0 6 6 36.0 - - - - - 510 - - -
1: 1 side slope _ _ __ _ _ _ _ \ Elev Side 1 Side 2 Area Vol Vol
Bottom of Weir: 474.0 14 14 196.0 464.0 17.2 wet / -- - - \� \' (sf) (cf) (cy)
3: 1 side slope i �:- __ _ _ _ ___\ ti� Low Point. 497.0 50 14 700.0
Top of Weir 475.5 20 20 400.0 447.0 16.E dry BottomdofsloWepr: 501.0 55 22 1276.0 3952.0 146.4 wet
Weir Length (ft): 1.4 // // / / / �`> / r; \ --r b \ 3: 1 s9.de slope
Weir Height (ft) : 1.5 / / / / / / / ��1`-- _ ;\ ' - \ T Top of WEir 503.3 67.2 31.2 2096.E 3878.5 143.E dry
Top of Berm: 476.5 / ; ; / / �, \ th (ft) : 12. 8
Top of Weir: 475.5 / / / _ \ �,. �. Weir Lena
/ i / / / / + .. �__ _ \ \ \ Weir Height (ft) : 2.3
Berm Width (ft) : 2.5 ; j / / Top of B,,rm: 504.3
Top of Weir: 503.3
1 i / / '(� ✓ / l //y'y,- - -= + ` 51 + Berm Width (ft) : 2.5
FI P , i/ //' �' �2°"I6 dT / // v3 Ag, Silt Trap #1
�J I i / / / // i ' D �22 J / l '` 69 ' _ - _ Drainage Area (ac) : 2.55
/ 3x S A•� I`'' / 0 520 - d \ \ ` o Wet Storage Re (cy): 170.85
' / �• D �20 �' / �l Dry Storage Req (cy) : 170.85
Total Storage Req (cy) : 341.70
+
o 0 0 9 \ m \02 / Elev Side 1 Side 2 Ar
Low Point 510.0 30 30 90
1: 1 side slope
VO \ \ \ \ \ / Bottom of Weir: 514.0 38 38 144
3: 1 side slope
\ A./ / ! Top of Weir 516.5 48 48 23
t C I P , 9°�� \ o \ \!\ \ ' I Weir Length (ft) : 15.3
/ \�• L \ \ _ ' Weir Height (ft) : 2.5
Top of Weir: 51
Top of Berm: 517.5
oom \ �g \ \�
n .
! ! ` / \ Berm Width (ft) : 33.0
0
I
cc
•
�' hYI�' ! / / / /
Are
VICINITY MAP
44 /?
BURNLEY FMgA<6, Co 20
C0
641
641
777
640
SITE
20
SCALE: 1" = 1+/- MILE
GENERAL 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 REGULATIONS VR 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 LAND
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO 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 DISTURBING ACTIVITIES IN AREAS OTHER THAN
INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR
WASTE 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 MEASURES AT
ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELPMENT 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 PERIODICALLY 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, maintain, remove and/or convert to permanent structure
all erosion and sediment control measures required by this plan regorless of the sale of any lot.
0
4
�1
Vol Vol
.0 y
f) (cf) (Cy)
.0 4668.0 173.6 wet + \\ i
04. 0 4685.0 173.5 dry \\ \ \ j
\�
LU
S T/ LIMITS OF.DISTUR�ANdE
� o ~
I pl I cc/ ,.I I I I I I I I I I I ='I .� / I � I I II H \ � ~ \ \ o
III a \ \
III (j \ - \ \ �\ \
\i I L-
CIP Silt Trap !\\` \ j o / + + -
Drainage Area (ac) : 42.455
. 5 RECOMMENDED DEWATERING \�\ \ \ ��+ /s
Wet storage Req (cy): 16.1PROVIDE ADEDUATE
Dry Storage Req (cy) : 164.15
\ \
Total Storage Req (cy): 328.30 STRAPPING SYSTEM FOR SEDIMENT
Elev Side 1 Side 2 Area Vol Vol \ i o \ + * \ / J T / +
BASINS \� \ \ o / 29/' 27 17'
(sf) (Cf) (Cy) POLYETHYLENE ENE CAP -r' ` ' ,p r 2�0:°'o ( + '
Low Point 468.0 24 35 840.0 \ Np '� i / A# �e
1: 1 side slope 510 . 0 \ / 1 * �I �� / / 1 I !
Bottom of Weir: 472.0 32 43 1376.0 4432.0 164.1 wet
3: 1 side slope l l Y , y I / J
Top of Weir 475.0 44 55 2420.0 5694.0 210.9 dry l/' +
Weir Length (ft) : NA (horseshoe)
Weir Height (ft) : 3.0 ' i L
Top of Berm: na PERFORATED POLYETHYLENEX / I
Top of Weir: 475.0 DRAINAGE TUBING, 10'' DIAMETE
r /
Berm Width (ft) : na
DITCH
SECTION A -A
USE SIDE SLOP
OF EXISTING CHANNEL
MODIFIED
EC-1 CLASS 1
DETAIL
A B
-10 1 6' - - - - -
A B
B
SECTION B-B
2' DEPTH
LGEOTEXTILE
FABRIC
i
+
506. 4' "YA
-STYLE" COUPLING WET STORAGE
.\ I
8" DENATERING ORIFICE,
SCHEDULE 40 STEEL STUB 1-FOOT MIN.-`
UUHHUbAIEU MEIAL HISEH J / ' --
XDRA I NAGS TUBING SHALL- COMPLY WITH ASTM F667
AND AASHTO M294
4S�
"u�mitt yT3e
Reviewed and Approve by thO
c)r pity L)0,v 9clpment Dep ftffl nt
ate. _6-_-1 Zo C
File#~ '10
/I
E&SC LEGEND
_ E&SC STD- IS SPEC
CE TEMP. STONE CONST. ENTRANCE 3.02
SF SILT FENCE 3.05
CIP CULVERT INLET PROTECTION 3.08
DO TEMPORARY DIVERSION DIKE 3.09
ST TEMPORARY SEDIMENT TRAP 3.13
TSD TEMPORARY SLOPE DRAIN 3.15
OP OUTLET PROTECTION 3.18
CD ROCK CHECK DAMS 3.20
LS LEVEL SPREADER 3.21
TO TOPSOILING 3.30
TS TEMPORARY SEEDING 3.31
PS PERMANENT SEEDING 3.32
SO SODDING 3.33
MU MULCHING 3.35
B/M SOIL STABILIZATION BLANKETS/MATTING 3.36
DC DUST CONTROL 3.39
GRAPHIC SCALE 1''=60'
0 60 120 180
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W. THOMA\ MUNCAS ER, JR.
C-3 CERT. NO, 16242 C
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DRAWN BY DATE
TM 3/25/05
CHECKED BY DATE
FILE EDIT
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SCALE
DRAWING
1: 1
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PROJECT 947BG
OF 1
SHEET NO.
LU
S T/ LIMITS OF.DISTUR�ANdE
� o ~
I pl I cc/ ,.I I I I I I I I I I I ='I .� / I � I I II H \ � ~ \ \ o
III a \ \
III (j \ - \ \ �\ \
\i I L-
CIP Silt Trap !\\` \ j o / + + -
Drainage Area (ac) : 42.455
. 5 RECOMMENDED DEWATERING \�\ \ \ ��+ /s
Wet storage Req (cy): 16.1PROVIDE ADEDUATE
Dry Storage Req (cy) : 164.15
\ \
Total Storage Req (cy): 328.30 STRAPPING SYSTEM FOR SEDIMENT
Elev Side 1 Side 2 Area Vol Vol \ i o \ + * \ / J T / +
BASINS \� \ \ o / 29/' 27 17'
(sf) (Cf) (Cy) POLYETHYLENE ENE CAP -r' ` ' ,p r 2�0:°'o ( + '
Low Point 468.0 24 35 840.0 \ Np '� i / A# �e
1: 1 side slope 510 . 0 \ / 1 * �I �� / / 1 I !
Bottom of Weir: 472.0 32 43 1376.0 4432.0 164.1 wet
3: 1 side slope l l Y , y I / J
Top of Weir 475.0 44 55 2420.0 5694.0 210.9 dry l/' +
Weir Length (ft) : NA (horseshoe)
Weir Height (ft) : 3.0 ' i L
Top of Berm: na PERFORATED POLYETHYLENEX / I
Top of Weir: 475.0 DRAINAGE TUBING, 10'' DIAMETE
r /
Berm Width (ft) : na
DITCH
SECTION A -A
USE SIDE SLOP
OF EXISTING CHANNEL
MODIFIED
EC-1 CLASS 1
DETAIL
A B
-10 1 6' - - - - -
A B
B
SECTION B-B
2' DEPTH
LGEOTEXTILE
FABRIC
i
+
506. 4' "YA
-STYLE" COUPLING WET STORAGE
.\ I
8" DENATERING ORIFICE,
SCHEDULE 40 STEEL STUB 1-FOOT MIN.-`
UUHHUbAIEU MEIAL HISEH J / ' --
XDRA I NAGS TUBING SHALL- COMPLY WITH ASTM F667
AND AASHTO M294
4S�
"u�mitt yT3e
Reviewed and Approve by thO
c)r pity L)0,v 9clpment Dep ftffl nt
ate. _6-_-1 Zo C
File#~ '10
/I
E&SC LEGEND
_ E&SC STD- IS SPEC
CE TEMP. STONE CONST. ENTRANCE 3.02
SF SILT FENCE 3.05
CIP CULVERT INLET PROTECTION 3.08
DO TEMPORARY DIVERSION DIKE 3.09
ST TEMPORARY SEDIMENT TRAP 3.13
TSD TEMPORARY SLOPE DRAIN 3.15
OP OUTLET PROTECTION 3.18
CD ROCK CHECK DAMS 3.20
LS LEVEL SPREADER 3.21
TO TOPSOILING 3.30
TS TEMPORARY SEEDING 3.31
PS PERMANENT SEEDING 3.32
SO SODDING 3.33
MU MULCHING 3.35
B/M SOIL STABILIZATION BLANKETS/MATTING 3.36
DC DUST CONTROL 3.39
GRAPHIC SCALE 1''=60'
0 60 120 180
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W. THOMA\ MUNCAS ER, JR.
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SCALE
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PROJECT 947BG
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GRAPHIC SCALE 1''=60'
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PROJECT 947BG
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TM 3/25/05
DRAWN BY DATE
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FILE EDIT
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SCALE
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PROJECT 947BG
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