20130611 Ver 1_Stormwater Info_20130610

1800 Herring Avenue
P. O. Box 10
Wilson, North Carolina 27894 -0010
252- 296 -3305
City of Wilson ♦ Stormwater Division
June 6, 2013
David Woodard, Jr.
Heritage Place of Wilson, LLC
2514 Nash St., NW
Wilson, NC 27896
20 130 6 1 1
RE: Approval of Stormwater Management Plan for Westwood Ave. Extention
This letter confirms the City of Wilson has reviewed and approved the stormwater plan you
provided for the subject development. Our review confirms that your development as shown
on the stormwater management plan complies with the Neuse River Basin Stormwater
Program for Nitrogen Removal Regulations for the City of Wilson and the Water Supply
Watershed Protection Regulations for the City of Wilson.
Mitigation payments to the Ecosystem Enhancement Program for 299 feet of stream
impact and up to 0.25 acres of wetland impact must be made prior to conducting the
authorized work. Please provide us with a copy of the credit purchase certificates.
Thank you,
Daryl orris, E.I.- CPS 0- CFM, LID, EE
Stormwater Environmental Specialist
Enclosure
C: Ron Sutton, P.E., Herring -Sutton & Associates
R. Bryant Bunn III, P.E., Director of Engineering Services

l •
HERITAGE PLACE
WESTWOOD AVENUE
STORMWATER MANAGEMENT PLAN
& ENGINEERED LEVEL SPREADER
DESIGN COMPUTATIONS
WILSON, NORTH CAROLINA
May 31, 2013
PREPARED BY: HERRING-SUTTON & ASSOCIATES, PA
2201 NASH STREET NORTHWEST
WILSON, NORTH CAROLINA

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WILSON, NORTH CAROLINA 27896
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WILSON, NORTH CAROLINA 27896
(252) 291 -8887 CHECKED BY DATE
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Point precipitation frequency estimates (inches /hour)
NOAA Atla: Volume 2 Version 3
Data type: Precipitation intensity
Time series type: Partial duration
Project area: Ohio River Basin
Latitude (decimal degrees): 35.6939
Longitude (decimal degrees): - 77.9456
PRECIPITATION FREQUENCY ESTIMATES
by duratior
1
2
5 -min:
5.02
5.84
10 -min:
4
4.67
15 -min:
3.34
3.92
30 -min:
2.29
2.7
60 -min:
1.43
1.7
2 -hr:
0.83
0.99
3 -hr:
0.58
0.7
6-hr:
0.35
0.42
12 -hr:
0.2
0.24
24 -hr:
0.12
0.15
2 -day:
0.07
0.08
3-day:
0.05
0.06
4-day:
0.04
0.05
7 -day:
0.03
0.03
10 -day:
0.02
0.03
204ay:
0.01
0.02
30-day:
0.01
0.01
45 -day:
0.01
0.01
60 -day:
0.01
0.01
5
10
25
50
100
200
6.68
7.55
8.5
9.28
10.02
10.73
5.35
6.04
6.77
7.39
7.96
8.51
4.51
5.09
5.72
6.24
6.71
7.15
3.21
3.69
4.24
4.7
5.14
5.57
2.06
2.4
2.82
3.18
3.54
3.9
1.22
1.46
1.76
2.04
2.32
2.63
0.87
1.04
1.27
1.49
1.72
1.96
0.52
0.63
0.77
0.9
1.04
1.2
0.3
0.37
0.45
0.54
0.62
0.72
0.19
0.23
0.28
0.33
0.39
0.45
0.11
0.13
0.16
0.19
0.22
0.25
0.08
0.09
0.11
0.13
0.15
0.17
0.06
0.07
0.09
0.1
0.12
0.13
0.04
0.05
0.06
0.06
0.07
0.08
0.03
0.04
0.04
0.05
0.06
0.06
0.02
0.02
0.03
0.03
0.04
0.04
0.02
0.02
0.02
0.02
0.03
0.03
0.01
0.02
0.02
0.02
0.02
0.02
0.01
0.01
0.02
0.02
0.02
0.02
Date /time (GMT): Mon May 2717:50:28 2013
pyRunTime: 0.0291020870209

12
August'07 Page 68
CA t-v V-.t-V -1. - �?Z': 310 Lf-1
CITY OF GREENSBORO
STORM DRAINAGE DESIGN MANUAL
CULVERT DESIGN -INLET CONTROL
HEADWATER DEPTH FOR CONCRETE PIPE CULVERTS
WITH INLET CONTROL
180
10,000
168
8,000
EXAMPLE
156
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6'
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11) e.5 11.0 5'
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3.
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3•
96
1,000
3.
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84
600
__
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August'07 Page 68

CITY OF GREENSBORO STORM DRAINAGE DESIGN MANUAL
W
O
Z
2
O
V
W
J
V
W
O
W
1-
W
Q
O
CULVERT DESIGN -INLET CONTROL
HEADWATER DEPTH FOR CONCRETE PIPE CULVERTS
WITH INLET CONTROL
loo 10,000
168 8,000 EXAMPLE
L.5 ".5
August'07 Page 68

C LI. V OWT 3 -- (PrSr '7''7 c FS
CITY OF GREENSBORO STORM DRAINAGE DESIGN MANUAL
W
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W
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W
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CULVERT DESIGN -INLET CONTROL
HEADWATER DEPTH FOR CONCRETE PIPE CULVERTS
WITH INLET CONTROL
August'07
Page 68

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RATIONAL FORMULA:
GIVEN DATA:
COMPUTATIONS
ENERGY DISSIPATOR EDP # 4
PROJECTMESTWOOD AVENUE
Q =CIA
C=
0.8
SEE TABLE 8
I (INMR.) (10YR.f
5.1
SEE FIGURE 8.03
A (AcREs�=
5.5
Q (10)(CF15.) =
22.4
Q (10)(CFSF
24.1
Sm =
1
RCP(DIA.)PN.) =
24
n (pIPEF
0.013
SEE TABLE 10.1
Q (FULL) (c:Fs)=
22.683
SEE FIGURE 5
V (FULL) (FPS)=
7.220
Q (10) IQ (FULL)=
1.06
C=
HELP
SEE FIGURE 20
V o (Fps)=
#VALUEI
Cw(F„ «)
ZONE =
2
SEE FIGURE 1
APRON LENGTH =
12 FT.
SEE FIGURE 2
APRON WIDTH -
6 FT.
STONE TYPE =
CLASS B
SEE FIGURE 2
STONE DEPTH -
22 IN.
SEE FIGURE 3

RATIONAL FORMULA:
GIVEN DATA
COMPUTATIONS:
ENERGY DISSIPATOR EDP # 18
PROJECTMESTWOOD AVENUE
Q =CIA
C= 0.8 SEE TABLE 8
I (IN.MR.) (10YR.F 5.1 SEE FIGURE 8.03
A (ACREs)= 5.5
Q (10)(CFS) = 22.4
Q (10)(CFe
10.6
Sm=
1
RCP(MA JON.) =
18
n (PIPE)=
0.013
SEE TABLE 10.1
Q (FULL) (CFS)=
10.533
SEE FIGURE 5
V (FULL) "sf
5.960
Q (10) 10 (FULL)=
1.01
C=
HELP
SEE FIGURE 20
V o (Fps)=
#VALUE!
C•V(FULL)
ZONE =
2
SEE FIGURE 1
APRON LENGTH =
9 FT.
SEE FIGURE 2
APRON WIDTH =
4.5 FT.
STONE TYPE =
CLASS B
SEE FIGURE 2
STONE DEPTH =
22 IN.
SEE FIGURE 3

s
RATIONAL FORMULA:
GIVEN DATA:
ENERGI
PROJEC'
1.
(INJHR.) (10YR 1
A (ACRES )=
Q (10)(CFS) =
Q (10)(CF )_
S )a
RCP (Du►.)(IN.) =
n mjc)=%=
Q (FULL)
V (FULL)
Q (10) /Q (FUI
C-
V O (FPS) _
APRON LENG'
APRON WID1
STONE TYP
STONE DEPT
•a
_
a
a
TOR EDP # 20
IOOD AVENUE
0.8
5.1
5.5
72.4
50.8
0.8
36
0.013
59.817
8.462
0.85
1.120
9.478
2
18 FT.
9 FT.
CLASS B
22 IN.
SEE TABLE 8
SEE FIGURE 8.03
SEE TABLE 10.1
SEE FIGURE 5
SEE FIGURE 20
C *V(FULL)
SEE FIGURE 1
SEE FIGURE 2
SEE FIGURE 2
SEE FIGURE 3

Permit Number.
(to be provided by DWo
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
— Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
— Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
"K, 1993). Forested filter strips do not require this type of maintenance.
— Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMW element:
Potential problem:
How I will remediate the problenz
The entire filter strip
Trash /debris is present
Remove the trash /debris.
system
The flow splitter device
(if applicable)
The flow splitter device is
dogged.
Unclog the conveyance and dispose
of any sediment off -site.
The flow sputter device is
damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Form SWU401 -bevel Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 1 of 3

BMW element:
Potential proble=
How I will remediate the problem:
The Swale and the level
lip
The swale is clogged with
sediment
Remove the sediment and dispose
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it
water until it is established. Provide
lime and a one -time fertilizer
a lication.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslope of the level lip.
The bypass channel
Areas of bare soil and /or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
bypass channel is needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
if applicable).
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one -time fertilizer application.
Sediment is building up on
the filter strip.
Remove the sediment and
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
dying.
Determine the source of the
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one -time
fertilizer application.
Nuisance vegetation is
choking out desirable species.
Remove vegetation by hand if
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
outlet.
Quality local Regional Office, or the
401 Oversight Unit at 919 - 733 -1786.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
1 acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:B=AGE PLACE OF WILSON- WESTWOOD AVENUE PROJECT
BW drainage area number:SB -3
Print name:DAVID W. WOODARD
Title:MEMBER MANAGER HERITAGE PLACE OF WILSON, LLC
Address:P.O. BOX 3299
Note: The legally responsible party should not be a homeowners association unless more than 50• /a of
the lots have been sold and a resident of the subdivision has been named the president.
it i6j&e- I,
r"t, 1 1 9 L a Notary Public for the State of
IN Ci , County of W i r_'� � , do hereby certify that
personally appeared before me thisS
day of V I AA 0 3 , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance
Witness my hand and official seal,
�001 W.
v
NOTARY
PUBLIC
��z v
Iiiiii X111" o
SEAL
My commission expires 'id,:0 I q
I
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 3 of 3

Permit Number.
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BUT This maintenance record will be kept in a
log in a known set location. Any deficient BUF elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BUF
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
— Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
— Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
"K, 1993). Forested filter strips do not require this type of maintenance.
— Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or iS inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
B1VIP element:
Potential problenu
How I will remediate the problenc
The entire filter strip
Trash /debris is present
Remove the trash /debris.
system
The flow splitter device
(if applicable)
The flow sputter device is
dogged.
Unclog the conveyance and dispose
of any sediment off -site.
The flow splitter device is
damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev.3 Page 1 of 3

BMW element:
Potential problem:
How I will remediate the problem:
The Swale and the level
lip
The swale is clogged with
sediment.
Remove the sediment and dispose
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it.
water until it is established. Provide
lime and a one -time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslope of the level lip.
The bypass channel
Areas of bare soil and /or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
damaged or npap is rolling
downhill.
Study the site to see if a larger
bypass channel is needed (enlarge if
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
if "ph vable .
Maintain grass at a height of
appraxii atel three to six inches.
Areas of bare soil and /or
Regrade the sod if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one -time fertilizer application.
Sediment is budding up on
the filter strip.
Remove the sediment and
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer applimtion.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
dying•
Determine the source of the
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one -time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
Choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
outlet.
Quality local Regional Office, or the
401 Oversight Unit at 919 -733 -1786.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev.3 Page 2 of 3

Permit Number:
(to be provided by DWQ)
acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:HERITAGE PLACE OF WILSON- WESTWOOD AVENUE PROJECT
BAP drainage area number:SB -18
Print name:DAVID W. WOODARD
Title:MEMBER- MANAGER HERITAGE PLACE OF WILSON, LLC
Address:P.O. BOX 3299
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
forgoing
W' Mil 0
Public for the State of
do hereby certify that
appeared before me this
- 20 13 and acknowledge the due execution of the
strip, riparian buffer,
Witness my hand and official seal,
m%
Ca
�N
410
SEAL
My commission expires
spreader maintenance requirements.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev-3 Page 3 of 3

r p
Permit Number.
(to be provided by DWo
Drainage Area Number.
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BM?.
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
— Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
— Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
— Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
— Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of operation and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potential problem:
How I will remediate the problem:
The entire filter strip
Trash/ debris is present.
Remove the trash /debris.
stem
The flow splitter device
(if applicable)
The flow splitter device is
dogged.
Unclog the conveyance and dispose
of anv sediment off -site.
The flow sputter device is
damaged.
Make any necessary repairs or
replace if damage is too large for
repair.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 1 of 3

BMP element:
Potential problenr.
How I will remediate the problem:
The swale and the level
The swale is clogged with
Remove the sediment and dispose
lip
sediment
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it
water until it is established. Provide
lime and a one -time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslope of the level lip.
The bypass channel
Areas of bare soil and /or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
damaged or ripap is rolling
bypass channel is needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
if applicable).
a roximatel three to six inches.
Areas of bare soil and /or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one -time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one -time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality local Regional Office, or the
outlet.
401 Oversight Unit at 919 -733 -1786.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev.3 Page 2 of 3

Permit Number.
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name-.HERITAGE PLACE OF WILSON- WESTWOOD AVENUE PROJECT
BW drainage area number:SB -10
Print name:DAVID W. WOODARD
Title:MEMBER- MANAGER HERITAGE PLACE OF WILSON, LLC
Address:P.O. BOX 3299
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I,
Ik
OL
a Notary Public for the State of
V I uL— County of 1 0 Y do hereby certify that
Q"bw.i& U—) - A _
personally appeared before me this
day of , and acknowledge the due execution of the
forgoing ter strip, riparian buffer, and/or level spreader maintenance ents.
Witness my hand and official seal,
\�P W ! I84S'S'*�ii
0 NO�gRG
II
SEAL
My commission expires It 1
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev-3 Page 3 of 3

� oFwar�G
AWA
MCDENR
o .yc
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
I: �RO.iEC�1NIroRMAT'It3N °�- .���:���:�- :.,,n,t_ _�•_.. ...�: -�,�� -_ _, �� F, .., - .�- .Y�:..;���..•- �,.��. ..: -,.. ,a4�- �..,�,, �,�,..n
Pmjectnwm HERITAGE PLACE OF WILSON -WESTWOOD AVENUE EXTENSION
Conn name RON SUTTON, P.E.
Phone member 252 291.8887
Date May 25, 2013
Drainage area number SB-3
III. DESIGNINFQFWA
The purpose of the LS-VFS Pollutant removal: 40% TSS, 30% TN, 35% TP
Stormwater enters LS -VFS from The drainage area
Type of VFS Engineered filter strip (graded 9 sodded, slope < 8%)
Explanation of any'Other• responses above
N Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
200,376
f?
Impervious surface area
140,263
f?
Percent impervious
7000
%
Rational C coefficient
0.80
Peak flow from the 1 in/hr storm
368
cfs
Time of concentration
500
min
Rainfall intensity, 1 0-yr storm
755
in/hr
Peak flow from the 10-yr storm
27.78
cfs
Design storm
1 inch/hour storm
Maximum amount of flow directed to the LS -VFS
3.68
cfs
Is a flow bypass system going to be used?
Y
(Y or M
Explanation of any 'Other' responses above
If Stormwater Enters the LS -VFS from a BMP
Type of BMP
Peak discharge from the BMP during the design storm
Peak discharge from the BMP during the 10 -year stone
Maximum capacity of a 100 -foot long LS -VFS
Peak flow directed to the LS-VFS
Is a flow bypass system going to be used?
Explanation of any 'Other' responses above
Do not complete this section of the form
Pick one.
cfs
cfs Do not complete this section of the form
10 cis
cfs Do not complete this section of the form
(1' or M
Form SW401 - LS -VFS - 29June2012 - Rev 10 $ page 1 of 3

LS-VFS Design
Forebay surface area
900
sq ft Forebay is adequately sized
Depth of forebay, at stomnvrater entry point
in
Depth of forebay at stormwater exit point
in
Feet of level Up needed per cls
10
fV*
Computed minimum length of the level lip needed
78
ft
Length of level lip provided
80
ft
WKMofVFS
30
ft
Elevation at downslope base of level rip
121.20
fmsl
Elevation at the end of the VFS that is farthest from the LS
119.10
fmsl
Slope (from level rip to the end of the VFS)
700
%
Are any draws present in the VFS?
N
(Y or N) OK
Is there a collector swale at the end of the VFS?
N
(Y or N)
8yfrass System Design Of applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
M
B
W
y (flow depth for 10-yeer storm)
freeboard (during the 10•year skim)
Peak veb* in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wedar d?
Does the channel enter the stream at an angle?
Explanation of any 'Other' responses above
Y (Y or N)
Y (Y or N) Please provide plan details of flow splitter & supporting calcs
fl
ft
ft
ft
ft
Mac
Y (Y or N) Redesign channel to discharge to a dissipator pad adjacent to the wetlar
Y (Y or M
BY -PASS DISCHARGE HAS BEEN DISCHARGED INTO A DISSIPATOR PAD
ADJACENT TO WETLAND, THEREFORE NO BY -PASS CHANNEL NEEDED PER
W
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 2 or 3

Iil. MQUIRED ITEM CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be foundAn incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project Initial in the space provided to indicate the
following design requirements have been met If the applicant has designated an agent, the agent may initial below.R a requirement has not been
met, attach justification.
Requried Rem: MIS Page or plan sheet number and any notes:
1. Plans (1' - 5V or larger) of the entire site showing:
- Design at ultimate budd -out,
- Offaite drainage (d applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (d applcable),
-High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
2. Plan details (1' = NY or larger) for the level spreader showing-
- Forebay (d applicable),
- FGgh flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate buddout
3 Section view of the level spreader (1' = 26' or larger) showing-
- tlnderdrain system (if applicable),
- Level hp,
- llpslope channel, and
- Donmsbpe filter fabric.
4 Plan details of the flow splitting device and supporting calculations (d applicable)
5 A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized
6 If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7 The supporting calculations
6. A copy of the signed and notarized operation and maintenance (O&M) agreement.
d w 5pooi C,3A c--f-4
C 5,b • t Y
CEO-10 59-0�
ltc-p 5(fW,
14W
dL3.
C.7 P' i T
"$ -4/f
C-4 p u4�— Y
C-5 g -4-Y
Form SW401 - LS -VFS - Mune2012 - Rev 10 page 3 of 3

�Ot WATp G
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
P,-PIR }IECTlNFORMAMON
. _ . _ . -AAA __ — .,. _,.." —p . I . - " I.. I ", r j
Project tame
HERITAGE PLACE OF WILSON - WESTWOOD AVENUE EXTENSION
Contact tame
RON SUTTON, P.E.
Phone number
252 - 291887
Date
May 25, 2013
Drishme area nutter
SB-10
U. DESIONINFORMATION
Z
The purpose of the LS-VFS
Polfutanl removal 40% TSS, 30% TN, 35% TP
Stormwalor enters LS-VFS from
The drake area
Type of VFS
Engineered Met strip (graded & sodded, slope < 8 %)
Explanation of any 'Other' responses above
N Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
422,532
f?
Impervious surface area
295,772
f?
Percent impervious
7000
%
Rational C coefficient
080
Peak flow from the 1 rnlhr storm
776
cfs
Time of concentration
5.00
min
Rainfall intensity, I0-yr storm
755
in/hr
Peak flow from the 10 -yr storm
5859
cfs
Design storm
1 mchmour storm
Maximum amount of flow directed to the LS -VFS
7.76
cfs
Is a flow bypass system going to be used?
Y
(Y or N)
Explanation of any 'Other' responses above
If Stormwater Enters the LS-VFS from a BMP
Do not complete this section of the form
Type of BMP
Pick one:
Peak discharge from the BMP during the design storm
cfs
Peak discharge from the BMP during the 10 -year storm
cfs Do not complete this section of the form
Maximum capacity of a 100 -foot long LS -VFS
10
cfs
Peak flow directed to the LS -VFS
cfs Do not complete this section of the form
b a flow bypass system going to be used?
(Y or N)
Explanation of any 'Other' responses above
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 1 of 3

LS-VFS Design
Forebay surface area
300
sq ft Forebay is adequately sized
Depth of forebay at stamilwater entry point
36
in
Depth of forebay at stomwvater exit point
12
in Depth is appropriate
Feet of level by needed per ca
10
M
Computed minimum length of the level lip needed
37
ft
Length of level rip provided
38
It
Width of VFS
30
It
Elevation at dowrstope base of krM rip
123.10
fmsl
Elevation at the end of the VFS that is farthest from the LS
122 00
fmsl
Slope (from level rip to the end of the VFS)
367
%
Are any draws present in the VFS?
N
(Y or N) OK
Is there a collector swale at the end of the VFS?
N
(Y or N)
Bypass System Design (if applicable)
Is a bypass system provided?
Y (Y or N)
Is there an engineered flow splitting device?
Y (Y or N) Please provide plan details of flow splifter & supporting talcs
Dimensions of the channel (see diagram below)-
M
ft
B
ft
w
ft
y (flow depth for 101wr storm)
ft
freeboard (during the 101ear storm)
It
Peak veb* in the channel during the 10-yr storm
WWI:
Channel lining material
Erosion control mailing
Does the bypass discharge through a welfand?
Y (Y or N) Redesign channel to discharge to a dissipator pad adjacent to the wellar
Does the channel enter the stream at an angle?
Y (Y or N)
Explanation of any 'Other' responses above
BYPASS DISCHARGE HAS BE DESIGNED TO DISCHARGE INTO A DISSIPATOR PAD
ADJACENT TO WETLAND, THEREFORE NO BY -PASS CHANNEL NEEDED
LVA
Form SW401 - LS-VFS - 29June2012 - Rev 10 page 2 of 3

JUL REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be foundAn incomplete submittal package will
result In a request for additional Information. This will delay final review and approval of the projectlnitial in the space provided to indicate the
following design requirements have been met H the applicant has designated an agent, the agent may initial belowl a requirement has not been
met, attach justification.
Requried Item:
1. Plans (V- UY or larger) of the entire site showing:
- Design at ultimate build-out,
-OU* drainage (if ale),
- Delineated drainage basis (include Rational C coefficient per basin),
- Fombay (d apple).
- l Ggh flow bypass system,
- Maintemance access,
- Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1"= 36' or larger) for the level spreader showing
- Forefray (if applicable),
- Kigh flow bypass system,
- One foot topo Fam between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultmate build -out
3 Section view of the level spreader (1' = 2(Y or larger) showing
- Underdrain system (if applicable),
Level hp,
- Upslope channel, and
- Downslope filter fabric
4. Plan details of the flow splitting device and supporting calculations (d applicable)
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area rs stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present
7. The supporting calculations
8 A copy of the signed and notarized operation and maintenance (O&K agreement
Irals Page or plan sheet number and any notes:
w 50�CPr (AJ 3_ WF J.
Q.) sown C--3;h u-� (-
a3 swr
2Lg Silo-of
eL3
(Z —5
CM3d�5`
GSA 4f"
�t/
8 T
C_4 A &f- Y
e3 8 coP4
Form SW401 - LS -VFS - Mune2012 - Rev 10 page 3 of 3

Form SW401 - LS -VFS - Mune2012 - Rev 10 page 1 of 3
of wnrEy
MCDDa
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.
f -MJEC- 'JNFt3RMAT'lBN r -!, a r
Project name
HERITAGE PLACE OF WILSON - WESTWOOD AVENUE EXTENSION
Corhtct trams
RON SUTTON, P.E.
Phone number
252 - 291 -887
Date
May 25, 2013
Drairmge area number
SB-18
PESIG IN ,
The purpose of the LS-VFS
Pollutant removal: 40% TSS, 30% TN, 35% TP
Stormwater enters LS-VFS from
The drainage area
Type of VFS
Engineered filter strip (graded 9 sodded, slope < 8%)
Explanation of arry 'Other• resporrses above
H Stormwater Enters the LS-VFS from the Drainage Area
Drainage area
114,127 f?
Impervious surface area
79,889 f?
Percent impervious
7000 %
Rational C coefficient
080
Peak flow from the 1 in/hr storm
210 cfs
Time of concentration
1000 min Please provide calculations for tc
Rainfall intensity, I0-yr storm
604 in/hr
Peak flow from the 10 -yr storm
12.66 cfs
Design storm
1 inch/hour storm
Maximum amount of flow directed to the LS-VFS
2.1 cfs
Is a flow bypass system going to be used?
Y (Y or N)
Explanation of any 'Other" responses above
R Stormwater Enters the LS -VFS from a BMP
Do not complete this section of the form
Type of BMP
Pick one:
Peak discharge from the BMP during the design storm
cfs
Peak discharge from the BMP during the 10-year storm
cfs Do not complete this section of the form
Maximum capacity of a 100 -foot long LS -VFS
10 cIs
Peak flow directed to the LS-VFS
cfs Do not complete this section of the form
Is a flow bypass system going to be used?
(Y or N)
Explanation of any 'Other• responses above
Form SW401 - LS -VFS - Mune2012 - Rev 10 page 1 of 3

LS-VFS Design
Forebay surface area
Depth of fo ebay at stonnwater entry point
Depth of foebay at stormwater exit point
Feet of level Op needed per cs
Computed minimum length of the level rip needed
Length of level Up provided
Width of VFS
Elevation at downslope base of W rip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level rip to the end of the VFS)
Are any drams present in the VFS?
Is there a collector Swale at the end of the VFS?
Bypass System Design (if applicable)
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below) -
M
w
y (flow depth for 10 -rear storm) -
heboard (during the 10 year storm)
Peak velocity in the channel during the 10-yr stone
Channel lining material
Does the bypass discharge through a wetand?
Does the channel enter the stream at an angle?
Explanation of any "Other' responses above
160 sq ft
7.00 %
N (Y or N)
N (Y or N)
Y (Y or N)
Y (Y or M
It
It
It
ft
III
ftfsec
Forebay is adequately sized
OK
Please provide plan details of flow splitter & supporting calcs
Y (Y or N) Redesign channel to discharge to a dissipator pad adjacent to the wetlar
Y (Y or N)
BYPASS DISCHARGE HAS BEEN DESIGNED TO DISCHARGE INTO A DISSIPATOR
PAD ADJACENT TO WETLAND, THEREFORE NO BY -PASS CHANNEL NEED
U1
;
� L j
Form SW401 - LS-VFS - 29June2012 - Rev 10 page 2 of 3
in
in
10
M
21
ft
25
It
30
It
121.20
fmsl
119.10
fmsl
7.00 %
N (Y or N)
N (Y or N)
Y (Y or N)
Y (Y or M
It
It
It
ft
III
ftfsec
Forebay is adequately sized
OK
Please provide plan details of flow splitter & supporting calcs
Y (Y or N) Redesign channel to discharge to a dissipator pad adjacent to the wetlar
Y (Y or N)
BYPASS DISCHARGE HAS BEEN DESIGNED TO DISCHARGE INTO A DISSIPATOR
PAD ADJACENT TO WETLAND, THEREFORE NO BY -PASS CHANNEL NEED
U1
;
� L j
Form SW401 - LS-VFS - 29June2012 - Rev 10 page 2 of 3

JUL REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be foundAn incomplete submittal package will
result in a request for additional Information. This will delay final review and approval of the project Initial in the space provided to indicate the
following design requirements have been met If the applicant has designated an agent, the agent may initial belowJf a requirement has not been
met, attach justification.
Requrled Rem:
1. Plans (1' - W or larger) of the entire site showing:
- Design at ultimate build-out,
- Off-site drainage (d applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- FordW (d apple),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement
2. Plan details (1' = 3ty or larger) for the level spreader showing:
- Forebay (d applicable).
- High flow bypass system,
- One foot lopo fines between the level Irp and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build-out.
3. Section view of the level spreader (1' = 2(Y or larger) showing-
- tlnderdrain system (d applicable),
- Level hp,
- Upslope channel, and
- Downslope filter fabric
4 Plan details of the flow splitting device and supporting calculations (d applicable)
5. A construction sequence that shows how the level spreader will be protected from
sediment until the entire drainage area ns stabilized.
;V159 Page or plan sheet number and any notes:
5 - UQ :1 4.,f-- 11
cl sme-F C AA J� �
A/ .S tog-T
6 If a non -engmeered VFS is being used, then provide a photograph of the VFS showing
that no draws are present
7 The supporting calculations
8 A copy of the signed and notarized operation and maintenance (O&M) agreement
CAA W- 14
Form SW401 - LS -VFS - 29June2012 - Rev 10 page 3 or 3