20091162 Ver 3_Application_20141001

743 W Johnson STREET, SUITE C
RALEIGH, NC 27603
E -MAIL: carl@a,crosen inQ eering net
September 29, 2014
Ms Karen Higgins
NC DENR -DWQ — Webscape Unit
512 N Salisbury Street
Raleigh, NC 27604
ENGINEERING
RE 401 Certification Permit # 09- 1162v2 Dated July 15, 2014
Duckview Creek Crossing
Dear Ms Higgins
C d661 (f V
OFFICE. 919.833.0830
FAX. [phone]
,1
OCT 0 12014 ;
J
This is a request for a modification to the impervious area that relates to the level spreaders for this
project Originally 3500 square feet was used for the houses to be built on the four lots There is a
pending sale for the lots and buyer would like to increase the house print to 6000 square feet The larger
footprint would enable a larger home and additional flexibility for future homeowners to make other
improvements The drainage areas remain the same and there are no other changes to the project plans
In terms of history, this project was approved on February 12, 2010, permit number DWQ project # 09-
1162 Due to economic factors the project was not built and the permit expired In May of 2013a request
was made to reissue the permit On July 15, 2013 the 401 Certification was authorized under permit
number DWQ # 09- 1162v2
As mentioned above, the drainage areas are the same and this is an increase in the "C" factor and
discharge The table below shows the level spreader lengths and forebay sizes for 2010, 2013, and this
request With the change of size for the future house footprint the 10 -year Increases but the proposed
length of level spreader remains the same as originally proposed in 2010 Compared to 2013 the
proposed length of level spreader Increases 6 feet for Drainage Area 1 and 7 feet for Drainage Area 2
Also In Drainage Area 2, the forebay increases in size by 5 square feet to 45 square feet total
Drainage Area 1
2010 Data for
LS
2013 Data for
LS
Requested LS
Change 2014
Drainage Area
33,184 sf
33,184 sf
33,184 sf
Impervious Area
13,684 sf
13,684 sf
19,648 sf
"C" Factor
051
051
064
Q 10 -year
Discharge
2 74 cfs
2 74 cfs
3 43 cfs
Min LS Length
36 ft
27 ft
34 ft
Proposed LS
Length
36 ft
30 ft
36 ft
Forebay size
40 sf
40 sf
40 sf

Drainage Area 2
2010 Data for
LS
2013 Data for
LS
Requested LS
Change 2014
Drainage Area
26,550 sf
26,550 sf
26,550 sf
Impervious Area
16,348 sf
13,348 sf
22,438 sf
"C" Factor
066
066
083
Q 10 -year
Discharge
2 83 cfs
2 83 cfs
3 56 cfs
Min LS Length
37 ft
28 ft
36 ft
Proposed LS
Length
37 ft
30 ft
37 ft
Forebay size
40 sf
40 sf
45 sf
Copies of the level spreader Excel spreadsheet calculations and drainage area maps are attached with
this request letter for your information A copy of the proposed site plan is also included The information
is grouped together by year
We appreciate your consideration of this request and if any additional information is needed please let me
know
Sincerely,
Carl Si , PE
CMS Engineering
Cc. Wayne Timberlake

2010 INFORMATION

O�O� W ATg9Qy
AM&
N �,® r
CDENR o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, printed and submitted
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
Project name Timberlake Subdivision
Contact name Cad Simmons
Phone number 919 - 833 -0830
Date
Drainage area number
12/9/2009 revised 2/8/10
DA 1 LOTS 1 &2
Il.,DESIGN- INFORMATION "1, ---'
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in /hr storm
Time of concentration
Rainfall intensity, 1 0 -yr storm
Peak flow from the 10 -yr storm
Where Does the Level Spreader Discharge?
To a grassed bioretention cell?
To a mulched bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Elevation at downslope base of level lip
Elevation at top of bank of the receiving water
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following
Length based on the 1 in /hr storm?
Length based on the 10 -yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
cfs
33,184 00 ftz
13,684 00 ftz
4124 %
051
039 cfs
500 min
7 04 in /hr
274 cfs
(Y or N)
(Y or N)
(Y or N)
y (Y or N)
Please complete filter strip characterization below
3000
ft
ft
000
ft
3000
ft
37800
fmsl
37600
fmsl
667
%
n
(Y or N) OK
4000 sq ft OK
13 ft/cfs
(Y or N)
y (Y or N)
(Y or N)
274 cfs
n (Y or N)
A bypass device is not needed
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Parts I and II Design Summary, page 1 of 2

Length of the level lip
Are level spreaders In series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below)
M
B
W
y
Peak velocity in the channel during the 10 -yr storm
Channel lining material
3600 ft Level spreader length OK
n (Y or N)
(Y or N)
Do not complete this section of the vrorksheet
(Y or N)
Do not complete this section of the worksheet
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
cfs
Do not complete this section of the worksheet
Do not complete this section of the worksheet
t W P
P
I
1
ITI
I
1 B 1
I
I t
M
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Parts I and 11 Design Summary, page 2 of 2

III- .'VQUIRM T- EMS "CHECKLIST��
Please indicate the page or plan sheet numbers where the supporting documentation can be found An 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 If a
requirement has not been met, attach justification.
1 Plans (1" - 50' or larger) of the entire site showing
- Design at ultimate build -out,
- Off -site drainage (If applicable),
- Delineated drainage basins (Include Rational C coefficient per basin),
- Forebay (If applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
Plan details (1" = 30' or larger) for the level spreader showing;
- Forebay (if applicable),
High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build -out
60 3 Section view of the level spreader (1" = 20' or larger) showing
Underdrain system (if applicable),
Level lip,
Upslope channel, and
- Downslope filter fabric
4 A date - stamped photograph of the filter strip that clearly shows the type of vegetation that is present
— 5 A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized
LS 6 The supporting calculations
GS ri7�o�i. Z 7 A copy of the signed and notarized operation and maintenance (0 &M) agreement
—Al LO 8 A copy of the deed restrictions (if required)
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Part III, page 1 of 1
Page/ Plan
Initials
Sheet No.
Gg
/r7a /
LS
�"/
1 Plans (1" - 50' or larger) of the entire site showing
- Design at ultimate build -out,
- Off -site drainage (If applicable),
- Delineated drainage basins (Include Rational C coefficient per basin),
- Forebay (If applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
Plan details (1" = 30' or larger) for the level spreader showing;
- Forebay (if applicable),
High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build -out
60 3 Section view of the level spreader (1" = 20' or larger) showing
Underdrain system (if applicable),
Level lip,
Upslope channel, and
- Downslope filter fabric
4 A date - stamped photograph of the filter strip that clearly shows the type of vegetation that is present
— 5 A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized
LS 6 The supporting calculations
GS ri7�o�i. Z 7 A copy of the signed and notarized operation and maintenance (0 &M) agreement
—Al LO 8 A copy of the deed restrictions (if required)
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Part III, page 1 of 1

Wayne Timberlake Subdivision 7ablCi /
Drainage Area 1 for Lots 1 &2
Level Spreader 1
Units C factor
Total drainage area
33,184
sf
Ex Impervious area offsite
2308
sf
0.95
Proposed street
4376
sf
0.95
Proposed houses, walks, decks, drives(3500sf ea lot)
7000
sf
0.95
Total Impervious area
13,684
sf
095
Lawn and wood area
19,500
02
Impervious
41.24
Composite
1
0.51

v
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of waTFR
CDENR o
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely filled out, pnnted and submitted
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)!
- "`ta` 'iAi
1 £PROJECT `_x- :f4;•1r�,K
Protect name Timberlake Subdivision
Contact name Carl Simmons
Phone number 919-833 -0830
Date 121912009 revised 218110
Drainage area number DA 2 LOTS 3 &4
- _ __ —_ - - _ _ °���i �'`'". >7s`sti'1 >tillJ ,'tv'. �r'i;.,s&. "'�*.i,�.$`�1'� k.�2Fr-i,.,Af: h:.r i� -� _ •_�- ���`.� X+t,'�"x j"f% ��L, °', r �,.: ?"'v�i; `�:x`?;,4 �y,
II:�DESIGNINFORMATION ��;;�,��,•,� x � ��, s, , < -�� r , _- - _ - ��o`,n' t � t'�� �� `�` >� � x ,.�,�,�
�. A!; cE,lu��:`�lz�' •fw��§�tx,rr"'°.i�; ;5,,,;23_- �x�w�t,�''..- _ �:��, v" .1;,,., .k'r ", 2r + -_
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
26,550 00
ft2
Impervious surface area
16,438 00
ft2
Percent impervious
6191
%
Rational C coefficient
066
ft
Peak flow from the 1 in /hr storm
040
cfs
Time of concentration
500
min
Rainfall intensity, 10 -yr storm
7 04 in /hr
Peak flow from the 10 -yr storm
283
cfs
Where Does the Level Spreader Discharge ?
To a grassed bioretention cell? (Y or N)
To a mulched bioretention cell? (Y or N)
To a wetland? (Y or N)
To a filter strip or riparian buffer? y (Y or N) Please complete filter strip characterization below
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
3000
ft
Width of dense ground cover
ft
Width of wooded vegetation
ft
Total width
3000
ft
Elevation at downslope base of level lip
38200
fmsl
Elevation at top of bank of the receiving water
38000
fmsl
Slope (from level lip to to top of bank)
667
%
Are any draws present?
n
(Y or N) OK
Level Spreader Design
Forebay surface area 4000 sq ft OK
Feet of level lip needed per cfs 13 ft/cfs
Answer "Y" to one of the following
Length based on the 1 in /hr storm? (Y or N)
Length based on the 10 -yr storm? y (Y or N)
Length based on the BMP discharge rate? (Y or N)
Design flow 283 cfs
Is a bypass device provided? n (Y or N) A bypass device is not needed
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Parts I and 11 Design Summary, page 1 of 2

Length of the level lip
Are level spreaders In series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Dimensions of the channel (see diagram below)
M
B
W
y
Peak velocity in the channel during the 10 -yr storm
Channel lining material
3700 ft
Level spreader length OK
n (Y or N)
(Y or N)
Do not complete this section of the worksheet
(Y or N)
Do not complete this section of the worksheet
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
ft
Do not complete this section of the worksheet
cfs
Do not complete this section of the worksheet
Do not complete this section of the worksheet
t W 4
�.I W
i
Form SW401 -Level Spreader, Filter Strip, Restoied Riparian Buffer -Rev 5 Parts I and 11 Design Summary, page 2 of 2
t�---
- - - - --
M
M
1
B
1
Form SW401 -Level Spreader, Filter Strip, Restoied Riparian Buffer -Rev 5 Parts I and 11 Design Summary, page 2 of 2

i
Z-
111. REQUIRED ITEMS`CHECKLIST .
Please indicate the page or plan sheet numbers where the supporting documentation can be found An 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 If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
G5 J
G5
1 Plans (1" - 50' or larger) of the entire site showing,
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
2 Plan details (1" = 30' or larger) for the level spreader showing
Forebay (if applicable),
High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build -out
66 41 3 Section view of the level spreader (1" = 20' or larger) showing
Underdrain system (if applicable),
- Level lip,
Upslope channel, and
Downslope filter fabric
GS /G 4 A date - stamped photograph of the filter strip that clearly shows the type of vegetation that is present
5 A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized
GS A—W 6 The supporting calculations
GS AaOf Z 7 A copy of the signed and notarized operation and maintenance (0 &M) agreement
N Q 8 A copy of the deed restrictions (if required)
Form SW401 -Level Spreader, Filter Strip, Restored Riparian Buffer -Rev 5 Part III, page 1 of 1

It
Wayne Timberlake Subdivision - 4 �G Z
Drainage Area 2 for Lots 3 &4
Level Spreader 2
Units C factor
Total drainage area
26,550
sf
Ex. Impervious area offsite
0
sf
Proposed street
9438
sf
0.95
Proposed houses, walks, decks, drives(3500sf ea lot)
7000
sf
0.95
Total Impervious area
16,438
sf
095
Lawn and woods
10,112
0.2
% Impervious
61.91
%
Composite C
I
1
1 066

cN
S v
vt

Permit Number:
(to be, providedhy DWQ)
Drainage, Area :Number:
'Filter Stripi, Restored 'Riparian Buffer and Level $preadeg
Operation and Maintenance Agree ment
I wiU,keep, a maintenance.iecord on:this� Bh P-. This maintmancerecord wzll.'be kept in�a
log inaknown,set,'location. Any deficient BMF 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 effieiency,of the BMP.
Important maintenance procedures:
- Immediately after thelilter strip, is,established, any,newly,planted vegetation
'willfbe watered twice weekly if needed until the,plants become 'established
(commonly six weeks).
Once ,a year, the filter, strip will bereseeded to maintain a dense,growth, of
vegetation
Stable,groundcover willbe maintained °in the drainageiarea to reduce the
sedimentload: to the, vegetation.
- Two,,to three times,a yeari grass,filt&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
maybezllowed to,grow as tall,as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filterstrips do not require =this type,of maintenance.
- Once<a year,,the,soii will'be ;aerated, f necessary.
- Once,a year, °soil pH will be tested,and time will be�added ifnecessary.
After the filter,strip is established, it will be inspected quarterly,and within 24 hours
after,every storm. =event greaterTthan lffinch,(or 15inches if 'in a,Coastal County).
Records of, operation and maintenance,wiII be kept in a known set'location and W ,� e,
avall'ablompon request.
Inspection activities, shall be performed as follows: Any problems that�are €ound,shall
be 4repaireddnunediately.
BW element:
Potential - roblen% _
_ H_& I=wilI remediate the problem:
The entire filter strip
_
Trash / debris is present.
Remove the`trash %debris.
system
The flow splitterdevice
(if applicable)
The flow sphtter,device is
dogged.
Unclog - the .,conveyance and dispose
of an �sediinerit off siW.
The flow sputter =device is
Make,any necessary repairs or
damaged.
replace if°damage4s,too large for
re air.
Form SWU401 -Level Spreader, FilW S*,,Restored Riparian' Buffer O &M =Rev.3
Page ;I of, 3

BMP element:
Potential roblem:
How l 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
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 Iltis; reestablish
the erosion,control material.
The filter strip
Grass is too short or too long
Maintain grass °at a height,of
if applicable).
a oximatel 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
gronind cover and water until it is
established. Provide,lime and,a
one -time fertilizer a lication.
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 intolhe receiving
wafter.
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 Oversi t Unit at 919 =733 -1786.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O&M -Rev.3 Page 2 of 3

PemffNurriber�
(to be provided bry,,6 WQ),
I acknowledge and,agree by my signature belowthat I am responsiblefor the
performance of the makrenaAce procedures listed above. I agree to notify DWQ of any
problems with the, sy �' to any changes to the,system.or rdsponsibleFjparty.
- - -stem or pnor
Project wwMayneTlaberlake. Springdale Water�Co. W6111,ot, #&
BMP drainage areanwnber:DA #1 and,DA#2
Print, name: Wayne Timberlake
Address:6801-KnighIdW,e Kni&tdale, NC 27545
Note-, The legally responaie;pafty, should'not,be a, homeowners associatiov unless more,than, 50% of
the l6ts.havwbeen sloldandia resident of the,subdivision)has been named1he president
a Notary Pfiblic for the State of
County of 14/ yt%e.-, do hereby certify tbAt
personally appeared abeford,,me this IVOI/
day of 2?4cegn 6e-j— and acknowledge the dueexecutionof the
forgoing filter strip, riparian bofferand/or level spreader,mainte6ahce�reqWrdments.
Witness my hand and,official seal,,
IAARV
.7 i2
Z
N NO
.-0
SEAL
My boftimi§i4on expires �_ FObruarY 74, - 2Q] 4
1
FormtSWU401 -Level, Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev3 Page I of 3

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2013 INFORMATION

©
*
fwA
O� TG y
HCDENR
l
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. PROJECT INFORMATION
Project name
Duckview Subdivision
Contact name
Patti Hildreth
Phone number
919 -833 -0830
Date
May 13, 2013
Drainage area number
DA #1 LOTS 1 & 2
11. DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule: Diffuse Flow
Stormwater enters LS -VFS from
The drainage area
Type of VFS
Engineered filter strip (graded & sodded, slope < 8 %)
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
33,184 fe
Impervious surface area
13,684 ft'
Percent impervious
41.24 %
Rational C coefficient
0.51
Peak flow from the 1 in /hr storm
0.39 cfs
Time of concentration
5.00 min
Rainfall intensity, 10 -yr storm
7.04 in /hr
Peak flow from the 10 -yr storm
2.74 cfs
Design storm
10 -year storm
Maximum amount of flow directed to the LS -VFS
2.74 cfs
Is a flow bypass system going to be used?
N (Y or N)
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 storm
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:
CIS
cfs Do not complete this section of the form.
10 cfs
cfs Do not complete this section of the form.
(Y or N)
Form SW401 - LS -VFS - 29June2012 - Rev.10 page 1 of 3

LS -VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws 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
B
W
y (flow depth for 10 -year storm)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
r�
40 sq ft
36 in
6 in
10 fUcfs
27 ft
30 ft
33 ft
378.30 fmsl
377.80 fmsl
1.52 %
N (Y or N)
N (Y or N)
N (Y or N)
N (Y or N)
ft
ft
ft
ft
fUsec
Pick one:
(Y of N)
(Y or N)
Forebay is adequately sized.
Depth is appropriate.
Form SW401 - LS -VFS - 29June2012 - Rev.10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An 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. If a requirement has not been
met, attach justification.
Requried Item:
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if 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.
8. A copy of the signed and notarized operation and maintenance (0 &M) agreement.
lnitiajs Page or plan sheet number and any notes:
1�
im
141A
I
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 3 of 3

_
ono" W A rFROG
AM
NCDENR
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. PROJECT INFORMATION
Project name
Duckview Subdivision
Contact name
Patti Hildreth
Phone number
919 -833 -0830
Date
May 13, 2013
Drainage area number
DA #2 LOTS 3 & 4
iII. DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule: Diffuse Flow
Stormwater enters LS -VFS from
The drainage area
Type of VFS
Engineered filter strip (graded & sodded, slope < 8 %)
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
26,550 ft,
Impervious surface area
16,438 ftz
Percent impervious
61.91 %
Rational C coefficient
0.66
Peak flow from the 1 in/hr storm
0.40 cfs
Time of concentration
5.00 min
Rainfall intensity, 10 -yr storm
7.04 in /hr
Peak flow from the 10 -yr storm
2.83 CIS
Design storm
10 -year storm
Maximum amount of flow directed to the LS -VFS
2.83 cfs
Is a flow bypass system going to be used?
N (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
cis
Peak discharge from the BMP during the 10 -year storm
cis 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.
Is 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
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws 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
B
W
y (flow depth for 10 -year storm)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
40
sq ft Forebay is adequately sized.
24
in
6
in Depth is appropriate.
10
fvcfs
28
It
30
ft
30
ft
382.50
fmsl
382.00
fmsl
1.67
%
N
(Y or N)
N
(Y or N)
N (Y or N)
N (Y or N)
ft
ft
ft
ft
ft/sec
Pick one:
W
(Y or N)
(Y or N)
V '
B
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An 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. If a requirement has not been
met, attach justification.
Requried Item:
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1' = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope filter fabric.
4. Plan details of the flow splitting device and supporting calculations (if 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.
8. A copy of the signed and notarized operation and maintenance (0 &M) agreement.
InT Page or plan sheet number and any notes:
NJk
Form SW401 - LS -VFS - 29June2012 - Rev.10 page 3 of 3

_j
Permit Number.
,(to be provided'byDW -0)
Drainage Area Number-
pilter,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 BUT 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 BNT.
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, grassifilter strips will`be mowed and the clippings
harvested to promote, the growth of thick vegetation with, optimum pollutant
removalrefficiency. 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 aesthetirrequirements
(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.
BMW element.
Potential problem:
How I will remediate the problem:
The entire filter strip
Trash/ debris is present
Remove the trash /'debris.
system
The flow splitter device
The flow sputter device is
Unclog,the conveyanceland dispose
(if applicable)
dogged.
of any sediment off-site.
The flow sputter device is
Make any necessary repairs or
damaged'.
replace if damage is too'large for
air.
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M Rev.3
004" Z
Page 1 of 3

BMP element:
Potential roblem:.
Honer IWi11 remediate the, "ioblem:
The,swale�and the level
The swale,is:dogged,with
Remove the sediment and dispose
lip
sediment.
of itoff -site. _
The level lip is cracked,
Repair or replace lip.
settled, undercat, eroded or
otherwise dams
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 aground 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
downslo a of the level lip.
The bypass channel
Areas of bare soil and /or
Regradeithe,sod 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
GrassJs too short of too long
Maintain grass at a height of
if applicable).
a roprn tel three to six inches.
Areas of bare sod 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.
restabiliae,the soil with vegetation if
necessary. Provide lime and a one -
time4er6hzer 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. Providez.one -time
fertilizerda lication.
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 occuired at the
Quality local Regional Office, or the
outlet.
401.Oversight Unit at 919- 733 -1786.
Form SWU40l -Level Spreader, Filter Strip, Restored "Riparian Buffer O&M Rev.3 Page 2 of 5 /9�

Permit Number:
(to be provided by DWQ)
I acknowledge,and agree by my,signature below that I am responsible forthe
performance�of themaiirtenance 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:Wayne Timberlake, Springdale Water Co. Well Lot #8
BW drainage area nwnber:DA #1 and DA #2
Print name: Wayne Timberlake
Title:Owner, Developer
Address:6801 Knightdale, Knightdale, NC 27545
Note: The legally responsible partyshould,not,be afhomeowners association!unless more than 50% of
the,lots,havvbeen soUand,a resident of the subdivision bas been named the president.
x7z� , GW�
I, lva,41 a Notary Public for the State of
County of Wa-kc , do hereby,certify that
personally appeared before me this -V
day of �2C�„z 6e r , d2 ooy , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance,requirements.
Witness my hand and official seal,
oX
�e
No 7
m
a rn "� r
IAA ®♦O�� O��O
SEAL
My commission expires 'FebrUCVV 15, '2Q14
Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev:3 Page 3 of 3

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2014 REQUESTED CHANGE INFORMATION

ALTA
OaO� W AT �q�G
H r
HWENR
T
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. PROJECT INFORMATION
Project name
Duckview Subdivision ( Timberlake)
Contact name
Carl Simmons
Phone number
919 833 0830
Date
9.29.2014
Drainage area number
DA #1 Lots 1 &2
II. DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule: Diffuse Flow
Stormwater enters LS -VFS from
The drainage area
Type of VFS
Engineered filter strip (graded & sodded, slope < 8 %)
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
33,184 ff
Impervious surface area
19,648 ft'
Percent impervious
59.21 %
Rational C coefficient
0.64
Peak flow from the 1 in/hr storm
0.49 cfs
Time of concentration
5.00 min
Rainfall intensity, 10 -yr storm
7.04 in/hr
Peak flow from the 10 -yr storm
3.43 cfs
Design storm
10 -year storm
Maximum amount of flow directed to the LS -VFS
3.43 cis
Is a flow bypass system going to be used?
n (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.
Is a flow bypass system going to be used?
(Y or N)
Explanation of any "Other" responses above
Form SW401 - LS -VFS - 29June2012 - Rev.10 papa 1 of 3

LS-VFS Design
Forebay surface area
Depth of forebay at stormwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws 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
B
W
y (flow depth for 10 -year storm)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
40 sq ft
36 in
6 in
10 fticfs
34 ft
36 ft
30 ft
377.75 fmsl
377.00 fmsl
2.50 %
n (Y or N)
n (Y or N)
(Y or N)
(Y or N)
ft
ft
ft
ft
ft/sec:
Pick one:
(Y or N)
(Y or N)
Forebay is adequately sized.
Depth is appropriate.
i B y
Form SW401 - LS -VFS - 29June2012 - Rev.10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. M 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. If a requirement has not been
met, attach justification.
Requried Item: Initials Page or plan sheet number and any notes:
1. Plans (1' - 50' or larger) of the entire site showing: �
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coefficient per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing: 6115_
- Forebay (if applicable),
Hgh flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1' = 20' or larger) showing:
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope fitter fabric. /
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will be protected from e";S
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 /y
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (08M) agreement. _
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 3 of 3

Wayne Timberlake
Duckview Subdivision 2014
D 1 &
Drainage Area 1 for Lots 2
Level Spreader 1
Units C factor
Total drainage area
33,184
sf
Ex Impervious area offsite
2308
sf
0.95
Proposed street
4376
sf
0.95
Proposed houses, walks, decks, drives(6000sf ea lot)
1`2000
sf
0.95
Total Impervious area
19,684
sf
0_.95
Lawn and wood area
13;500
_
0.2
Impervious
59.32
Composite C
0 64

If Stormwater Enters the LS -VFS from a BMP
o�o� Waregoc
`�
Pick one:
.
HCwYE HR
O t
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. PROJECT INFORMATION
(Y or N)
Project name
Duckview Subdivision (Timberlake)
Contact name
Carl Simmons
Phone number
9198330830
Date
9.29.2014
Drainage area number
DA 2 Lots 3 & 4
II. DESIGN INFORMATION
The purpose of the LS -VFS
Buffer Rule: Diffuse Flow
Stormwater enters LS -VFS from
The drainage area
Type of VFS
Engineered filter strip (graded & sodded, slope < 8 %)
Explanation of any "Other" responses above
If Stormwater Enters the LS -VFS from the Drainage Area
Drainage area
26,550 fe
Impervious surface area
22,438 fe
Percent impervious
84.51 %
Rational C coefficient
0.83
Peak flow from the 1 in /hr storm
0.51 cfs
Time of concentration
5.00 min
Rainfall intensity, 10 -yr storm
7.04 in/hr
Peak flow from the 10 -yr storm
3.56 cfs
Design storm
10 -year storm
Maximum amount of flow directed to the LS -VFS
3.56 cfs
Is a flow bypass system going to be used?
n (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
CIS
Peak discharge from the BMP during the 10 -year storm
CIS 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 - 29June2012 - Rev. 10 page 1 of 3

LS -VFS Design
Forebay surface area
Depth of forebay at stomlwater entry point
Depth of forebay at stormwater exit point
Feet of level lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downslope base of level lip
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws 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
B
W
y (flow depth for 10 -year stone)
freeboard (during the 10 -year storm)
Peak velocity in the channel during the 10 -yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any "Other" responses above
45 sq ft
36 in
6 in
10 fUcfs
36 ft
37 ft
30 ft
382.00 fmsl
381.50 fmsl
1.67 %
n (Y or N)
n (Y or N)
(Y or N)
(Y or N)
ft
ft
ft
ft
ft
fUsec
Pick one:
(Y or N)
(Y or N)
W
Forebay is adequately sized.
Depth is appropriate.
B 1
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 2 of 3

III. REQUIRED ITEMS CHECKLIST
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An 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. If a requirement has not been
met, attach justification.
Requried Item: Initials Page or plan sheet number and any notes:
1. Plans (1' - 50' or larger) of the entire site stowing: e�5-
- Design at ultimate build -out,
Off -site drainage (if applicable),
Delineated drainage basins (include Rational C coeffident per basin),
Forebay (if applicable),
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW), and
Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing: 61
-12
(if applicable),
High flow bypass system,
One foot topo lines between the level lip and top of stream bank,
Proposed drainage easement, and
Design at ultimate build -out.
3. Section view of the level spreader (1" = 20' or larger) showing: 5
- Underdrain system (if applicable),
Level lip,
Upslope channel, and
Downslope finer fabric.
4. Plan details of the flow splitting device and supporting calculations (if applicable).
5. A construction sequence that shows how the level spreader will be protected from 66
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. G 5
8. A copy of the signed and notarized operation and maintenance (0 &M) agreement. C �
Form SW401 - LS -VFS - 29June2012 - Rev. 10 page 3 of 3

Wayne Timberlake
Duckview Subdivision 2014
Drainage Area 2 for Lots 3 &4
Level Spreader 2
Units C factor
Total drainage area
26,550
sf`
Ex. Impervious area offsite
0
sf
Proposed street
9438
sf
0.95
Proposed houses, walks, decks, drives(6000sf ea lot)
12000
sf
0.95
Total Impervious.area
22,438
sf
0.95
Lawn and woods
4,112
02
% Impervious
84.51
Composite C
0.833842

e
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 tliis' SNT. This,mainienarice record will,be kept in a
'log, in a knownset'location. Any deficient,8W, elements noted in the:inspection will be
.cotrected, repaired or replaced immediately. 'These defidenciestcan affect the °integrity
�of structures, safety of the public, and the removal, efficiency of the B]ylP,.
Important maintenance ,procedures:
Immediately after the filter strip is established, any newly planted vegetation
will be watered,twice weekly if ineeded,until�the p_ lants become established
(commonlysix weeks).
Once a year; the filt_er strip will be reseededto maintain a dense ,growth of
vegetation
- Stable groundcover will be,mainta;n_ ed in the drainage,area to reduce the
sediment load to the vegetation.
Two to three'times a year„grass;filter strips,will'be mowedand theclippings,
harvested topromote the,growth of thick vegetation with optimum pollutant
removal effidericy.'Turf grassshould not be cut shorter than 3 to 5 inches and
may be:allowed to-grow as tall,as 12 inches,depmding,on aesthetic requirements
(NIPC,1993)- Forestedfilt& strips do notrrequire,this type,of maintenance.
`Once a year, the soil Will' be aerated if necessary:
- Once,a year, soilfipH will'be tested and lime will be,addedhifznecessary.
After, the filter stripais established, it will be,Jr spected quarterly and'within,24 hours'
after every`storm eventgreaie_k4han 1.0 inch (or 1.5'inches,if'in a.Coastal County).
Records, of operation and maintenance will, be kept in a knownset locatimand will be
available upon request
Inspection adtivitie&shal1be performedras follows: Anyproblems that are,found shall
be repaired immediately:
BW element: a
%teniial- roblenr,
Row'1 wiff remediate the roble_w
The, entire,filterstrip
Trash/ debris is present
Remove the trash /debris.,
stem
The,flow splitter device
(if applicable)
The flow splitter device is
clogged.
Unclog thetconveyance and dispose
of any sedimentsoff -site.
The flow, sphtter-device:is
'Make any necessary repairs or'
damaged.
replace if damage,is too large for,
air.
Form SWU401Level Spreader, Fi veStrip, Restored Riparian Buffer O&M =Rev.3
Page 1 of3

BMP element:
Potential roblem:
How I will remediat:e the probleirr
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 dam
There,is,erosion,around,the
Regrade,the,soil to create a:berm
,endof 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.
tA:grow on the swale or just
downslo e�of the level lip.
The bypass channel
.Areas ofrbare 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 channefis needed (enlarge if
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Ckassfis too short or too long
Maintain grass at a height of
if applicable).
approximately three to sbc 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 wafter until it is
established. Provide lime and a
one -time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabdize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants•are desiccated.
Provide additionalirrigation 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
chol8ng out desirable species.
possible. If pesticide is used, do not
allow it to,get into, thereceiving
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 OveTsight Unit at 919 - 733 -1786.
Form S WU401 -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 narne:Wayne Timberlake, Springdale Water Co. Well Lot #8
BW drainage area mcmber.DA #1 and DA #2
Print name:Wayne Timberlake
Title:Owner, Developer
Address:6801 Knightdale, Knightdale, NC 27545
Note: The legally responsible party should not bez homeowners association unless more than 50% of
the lots °have been sold and a resident of the subdivision has been named the president.
I, a� •� a�i� / /�^ , a Notary Public for the State of
Alyy -W County of Wa,&— , do hereby certify that
W Vne personally appeared before me this V51
day of. Z?eceim 6e r , .2- ooq' , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level,spreader maintenance requirements.
Witness my hand and official seal,
V
m
�� NO
� d!C
1,44
SEAL
SEAL
My commission expires Februcffy 75, 2gT4
Form'SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 3 of 3

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