20060794 Ver 2_More Info Received_20081201

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©Zj Michael F. Easley, Governor
William G. Ross Jr., Secretary
7 North Carolina Deparunent of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quallty
September 23, 2008
DWQ Project # 06-0794, Ver. 2
Johnston County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Felton Thompson
W&T Development
?
Box 1594
Clayton, NC 27520
Clayton, NC 27520 D ?`J
Subject Property: The Vineyards At Tuscan DEC 1 Z008
Ut to Marks Creek [030402, 27-38, C, NSW]
DENR - WATER QUALITY
REQUEST FOR MORE INFORMATION WET. LANDSANDSTORMWATERBRaN
Dear Mr. Thompson:
On September 3, 2008, the Division of Water Quality (DWQ) received your application dated August 30,
2008, with additional information received from you on September 9, 2008, to fill or otherwise impact 78
linear feet perennial stream impact, 70 linear feet intermittent stream impact, and 7,200 square feet of
Zone 1 Neuse River basin protected riparian buffers and 4,000 square feet of Zone 2 Neuse River basin
protected riparian buffers to construct the proposed residential development at the site. The DWQ has
determined that your application was incomplete and/or provided inaccurate information as discussed
below. The DWQ will require additional information in order to process your application to impact
protected wetlands and/or streams on the subject property. Therefore, unless we receive five copies of the
additional information requested below, we will place this project on hold as incomplete until we receive
this additional information. If we do not receive the requested information, your project will be formally
returned as incomplete. Please provide the following information so that we may continue to review your
project.
Additional Information Requested:
1. Please provide building envelopes for all lots with wetlands, streams or buffers on the site plans.
2. Per the requirements of the Neuse River Basin Riparian Buffer Rule, you must show that this site
meets diffuse flow requirements with a level spreader or other BMP per Chapter 8 of the BMP
Manual (see hM://h2o.enr.state.nc.us/su/bmp forms.htm).
3. Please provide stream determination documentation on the site (upstream and downstream photos
and DWQ stream identification forms).
Please submit this information within 30 calendar days of the date of this letter. If we do not receive this
requested information within 30 calendar days of the date of this letter, your project will be withdrawn
and you will need to reapply with a new application and a new fee.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: htto://h2o.enr.state.nc.us/newettands
?` Caroltn
ura!!y

W&T Development
Page 2 of 2
September 23, 2008
.It
This letter only addresses the application review and does not authorize any impacts to wetlands, waters
or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call M.S. Cyndi Karoly or Mr. Ian McMillan at 919-733-
1786 if you have any questions regarding or would like to set up a meeting to discuss this matter.
Sincerely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBKlijm
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Alsey Gilbert, 112 N. Church Street, Clayton, NC 27520
Filename: 060794Ver2TheVineyardsAtTascan(Johnston)On_Hold.doc
„. ?N Aia
WDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN SUFFER 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)!
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 iNhr storm
Time of concentration
Rainfall intensity, 10-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 tip 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 irdta storm?
Length based on the 10 yr storm?
Length based on the BMP discharge rate?
Design flow
cfs
324,957-60 ft'
74,923.20 ft2
23 06 %
0.37
2.76 cfs
5 00 min
7.3inthr
20.15 cfs
N (Y or N)
N (Y or N)
N (Y or N)
Y (Y or N) Please complete filter strip characterization below
30:00 It
30.00 ft
20.00 ft
80.00 ft
268.00 fmsl
264.00 fmsl
5.00 % OK M
N (Y or N) OK 0 ??D D
149.80 sg ft OK DEC 1 2008
26 fucfs pENR - WA 'TER Q A R BRANCH
ANDS AND SIORMW
Y (Y or N)
N (Y or N)
N (Y or N)
2.76 cfs
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts 1. and ll. Design Summary, page 1 of 4
Is a bypass device provided?
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):
Y (Y or N) OK
72.00 ft Level spreader length OK.
N (Y or N)
N (Y or N)
Y (Y or N)
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 4
M
B
W
Y
Peak velocity in the channel during the 10-yr storm
Channel lining material
M
2.00 ft
2.00 ft
10.00 ft
0.66 It
20.30 cfs
GRASS SEE ATTACH.
W
B
M
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Parts I. and It. Design Summary, page 3 of 4
Please indicate the page or plan sheet numbers where the supporting documentation can be found. M incomplete submittal package wlll
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 reg4ements 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.
_Ai6-

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.
A. It
Pr`s &-
o e reeaf Cd
d}rk4"e
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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.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Ship, Restored Riparian Buffer-Rev.5 Part III, page 4 of 4
North Americar Green ECMDS Version 4 3
:PROJECT NAME: TUSCAN PR
.FROM STATION/REACH: TO STATION/REACH R
HYDRAULIC RESULTS
Discharge
cis Peak Flow
Period hrs elocity [fps Area ISO) Hydraulic
Radiusk Normal
Depth k
20.2 24.0 9.53 2.12 0.43 0.64
Urreintarced
S = 0.0500
LINER RESULTS
1L \-.' 1
Bottom
2.0 Width - 2.00 ft 0
Not to Scale

Reach Matting Type
tabkAnalys' Vegetation Chsacte&tirs
Petmissble
Calculated
Safety Factor
Remarks
Staple Pattern Phase Gass Type Densely Shear Stress
[as8 Shear Stress
(Psfl
Straight Unreinforced Vegetation D Sad 50-75% 733 2.01 1.66 STABLE
Soil flay 0.070 0.367 0.19 U?f5TAPLF
s Back to Input Scrcen ;
1
lath American Green - ECMDS Version 4 3
........
'ROJECT NAME TUSCAN
WdA STATIONIREACH: TO STATION/REACH
HYDRAULIC RESULTS
Discharge
cfs Peak Flow
Period hrs Velocity [fps Area (sq ft) Hydraulic
Radius(R) Normal
D h ft
20.2 24.0 9.16 2.21 0.44 am
LINER RESULTS
AREA 7 46,ACRES DESIGN FREQUENCY:
C125BN {n-0
S = 0.0500
1 L Bottom J 1
20 Width = 2.00 ft 2.0
Not to Scale

Reach MAng Type
tabitydnalys' Vegetation Characteristics
Perrrissble
Calculated
SafetyFactar
Remarks
Staple Pattern

hase

lass
I
Type
ensty
Shear Stress
[Psi)
Shear Stress
(Pafl
Straight C125BN Unvegetated 235 2.07 114 STABLE
Staple D
;Back to Input Screen';
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WME
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be cornpietely Med out, printed and submitted
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET) I
---------- ---
(may
:::::i::::::-::i:::::?'..'..
III::N!iM..::R4lq:`. '.? . :::::-::.::iii..:.:::::i ?.:::::.:- ::::: .::::::::::::::: :.::
........ ....... ..
........................................... ....... ......... ............... ......... .... ............
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
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 in/hr storm
Time of concentration
Rainfall intensity, 10-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 irdly storm?
Length based on the 10-yr storm?
Length based on the BMP discharge gate?
Design flow
219,106-80 ft'
35,719.20 ft'
16.30 %
0.37
1.86 cfs
5.00 min
7-3 in/hr
13.59 cfs
N (Y or N)
N (Y or N)
N (Y or N)
Y (Y or N) Please complete filter strip characterization below.
60.00 ft
20.00 ft
30.00 ft
110.00 ft
262.00 fmsl
256.00 fmsl
5.45 %
N (Y or N)
72.00 sq ft
27 ft/cfs
Y (Y or N)
N (Y or N)
N (Y or N)
1.86 ds
o?
?P o4?
OK 3 _ap5
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts 1. and B. Design Summary, page 1 of 4
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 51.00 ft Level spreader length OK.
Are level spreaders in series? N (Y or N)
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):
N (Y or N)
Y (Y or N)
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 4
M
B
W
Y
Peak velocity in the channel during the 10-yr storm
Channel lining material
M
2.00 ft
2.00 it
10.00 it
0.78 ft
13.59 cfs

w
B
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Surnmary, page 3 of 4
..................
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 WIN 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. N a
requirement has not been met, attach justHication.
Pagel Plan
Initials Sheet No.
?"- Z4
?J1r ? f J
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 (f 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.

ACN&--
?? /? ? low
6 /1 ( V
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.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (O&M) agreement.
8. A copy of the deed restrictions (if required).
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 4 of 4
HYDRAULIC RESULTS
Discharge
cfs Peak Flow
Period (hr s Velocity [fps Area (sq.k) Hydraulic
Radius ft Normal
D k
13.6 24.0 4.92 2.76 0.50 0.78
LINER RESULTS
Uroeinfotced Vec
=D B` Y-
?ESIGN?FREgUENLY lOYEAR
1I ` Batorn I 1
L_ _J
2.0 Width = 2.00 It 2.0
Not to Scale

Reach M atting Type
tal3tyAnaiys' Vegetation Characteristics
Permisable
Caka/ated
Safety Factor
Remarks
Staple Pattern Phase Class
I
I Type
Density
Shear Stress
(psf)
Shear Stress
[Psf)
Straight Unreinforced Vegetation D Sod 75-95% 3.33 2.64 1.26 STABLE
Soil Clay Loam 0.050 0.042 1.19 STABLE
Back to Input Screen

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IdC ENR O to - 01 °? ?} V
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely bled out, printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET) I
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area 29,620.80 ft'
Impervious surface area 6,969.60 ft,
Percent impervious 23.53 %
Rational C coefficient 0.47
Peak flow from the 1 iMx storm 0.32 cfs
Time of concentration 5.00 min
Rainfall intensity, l0-yr storm 7.3 inlhr
Peak flow from the 10-yr storm 2.33 cfs
Where Does the Level Spreader Discharge?
To a grassed bioretention cell? N (Y or N)
To a mulched bioretention cell? N (Y or N)
To a wetland? N (Y or N)
To a filter strip or riparian buffer? y (Y or N) Please complete fitter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass 10.00 ft
Width of dense ground cover 20.00 ft
Width of wooded vegetation 30.00 ft
Total width 60.00 ft
Elevation at downslope base of level lip 263.00 fmsl
Elevation at top of bank of the receiving water 260.00 fmsl
Slope (from level lip to to top of bank) 5.00 % OK
Are any draws present? N (Y or N) OK
Level Spreader Design U
Forebay surface area 60.00 sq ft OK
Feet of level lip needed per cfs 39 ft/cfs
Answer 'Y" to one of the following: DEC 1 2008
Length based on the 1 inlhr storm? Y (Y or N)
Length based on the 10-yr storm? N (Y or N) DENR - WATER QUALITY
Length based on the BMP discharge rate? N (Y or N) WETLANDS AND STORMWATER BRANCH
Design flow 0.32 " cfs
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and It Design Summary, page 1 of 4
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 13.00 It Level spreader length OK.
Are level spreaders in series? N (Y or N)
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):
N (Y or N)
Y (Y or N)
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and ll. Design Summary, page 2 of 4
M 2.00 ft
B 2.00 ft
w 10.00 ft
y 0.42 ft
Peak velocity in the channel during the 10-yr storm 2.40 cfs
Channel lining material N
W
M
B
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 3 of 4
- - - -----------
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. N a
requirement has not been met, attach justification.
Page! Plan
Initii(s Sheet No. .
•'? 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 (ROAN), and
Boundaries of drainage easement
AJb / J 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.
A J "
'
or larger) showing:
= 20
3. Section view of the level spreader (1
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
/?
A`!
4. A date-stamped photograph of the filter strip that dearly 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.
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
TU / 8. A copy of the deed restrictions (if required).
4-
4? ?-pP
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 4 of 4
HYDRAULIC RESULTS
Discharge
cfs Peak Flow
Period s elocity (fps Area [sq.ft] HydrauNc
Radius ft Normal
D ft
2.3 24.0 1.96 1.18 0.30 0.42
Unreinforced
S = 0.0500
LINER RESULTS
1L \L 11
Bottom
2.0 Width - 2.00 ft 2.0
Not to Scale

Reach Matting Type
tabityAnafys' Vegetation Characteristics
Permissble
Calculated
Safety Factor
Remarks
I Staple Pattern Phase Class Type Density Shear Stress
(psf] Shear Stress
(psf)
Straight Unreinforced Vegetation D Sod 75-95% 3.33 1.30 2.57 STABLE
Sail Clay Loam 0.050 0.007 7.22 STABLE
Lf7j
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?? f1 U
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WDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be completely fttled out printed and submitted.
DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area 100,188-00 ft'
Impervious surface area 23,479.00 ft'
Percent impervious 23.43 %
Rational C coefficient 0.44
Peak flow from the 1 in/hr storm 1.00 cfs
Time of concentration 5.00 min
Rainfall intensity, 10-yr storm 7:3 in/hr
Peak flow from the 10-yr storm 7.30 cfs
Where Does the Level Spreader Discharge?
To a grassed bioretention cell? N
To a mulched bioretention cell? N
To a wetland? N
To a filter strip or riparian buffer? Y
Other (specify)
Filter Strip or Riparian Buffer Characterization (rf applicable)
Width of grass 15.00
Width of dense ground cover 20,00
Width of wooded vegetation 30.00
Total width 65.00
Elevation at downslope base of level lip 244.00
Elevation at top of bank of the receiving water 241.00
Slope (from level lip to to top of bank) 4.62
Are any draws present? N
Level Spreader Design
Forebay surface area 50.00
Feet of level lip needed per cfs 37
Answer "Y" to one of the following:
Length based on the 1 inlhr storm? Y
Length based on the 10-yr storm? N
Length based on the BMP discharge rate? N
Design flow 1.00
(Y or N)
(Y or N)
(Y or N)
(Y or N) Please complete filter strip characterization below.
ft
ft
ft
ft
fmsl
fmsl
% OK
Y
(YarN) OK
DEC: W
sq ft OK 2C)`?
ftlcfs DENk - yc .: i? ..
WERANOS ANI) STokm,",A • E'j? fjRANCH
(Y or N)
(Y or N)
(Y or N)
cfs
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 4
Is a bypass device provided?
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):
Y (Y or N) OK
47.00 ft Level spreader length OK.
N (Y or N)
N (Y or N)
Y (Y or N)
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 4
M
B
W
Y
Peak velocity in the channel during the 10-yr storm
Channel lining material
2'00 ft
2 00 ft
10.00 ft
0.64 ft
7.30 cfs
Grass
W
1
M Y
B
M
1
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev .5 Parts I. and II. Design Summary, page 3 of 4

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.
- 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.
A J ? 4. A date-stamped photograph of the falter strip that clearly shows the type of vegetation that is present.
L l 5. A construction sequence that shows how the level spreader will be protected from sediment until the
entire drainage area is stabilized.
AJ 6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement.
1-d 66 966 f *'.8. A copy of the deed restrictions (if required).
a? ?aP
Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Part III, page 4 of 4
............... ......
BY AtG
:North AmericanGrem-ECMDSVerion4.3 lifl210080230PMCDMPUTE6
;PROJECT NAME TUSCAN iPROJECT NO LEVELSPREADER 4
.FROM STATIONMEACH: -'TO STATION/REACH. Af3AINAGE AREA DESIGN FREgUENLY 10YEAR
HYDRAULIC RESULTS
Discharge
cfs Peak Flow
Period s elocity (fps

I Area (N.ft) Hydraulic

Radiusft Normal

D h ft
7.3 24.0 3.45 2.12 0.43 0.64
LINER RESULTS
Not to Scale

Reach Matting Type
tabityAnalys' Vegetation Characteristics
Permin"e
Calculated
Safety Factor
Remarks
Staple Pattern Phase Class Type Density Shear Stress
(psf) Shear Stress
(psf)
Straight Unreinfofced Vegetation D Sod 75-95e 3.33 1.86 1.79 STABLE
Soil Clay Loam 0.050 0.021 2.40 STABLE
S Bak to nrxrt Screen
0 Wickh -200 ft 2
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' IEC Y 2008
3E- WATER QUALITY
WETLANDS AND STORMVyATER BRANCH
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http://www. axcessmypics.com/photos/photoO2/e2/ 1 a/cO843 ce63 75 c. j pg 11/26/2008
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 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
(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.
BUT element: Potential problem: How I will remediate the roblem:
The entire filter strip Trash/ debris is present. Remove the trash/ debris.
system
The flow splitter device The flow sputter device is Unclog the conveyance and dispose
(if applicable) dogged. of any sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged. replace if damage is too large for
repair.
DEC 12 (Kb?` IM 0 W R___1 P
r 2008
DENR - WATER QUALITY
WETLANDS AND STORMWATER BRANCH
Form SWLJ401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3
BMP element: Potential roblenc How I will remediate the roblem:
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 water
bypassed it. 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 e 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 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 DWO)
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: rd Sr ,il 7-l9/ '51-1
BMP drainage area number:--< / ' 2 L S 3 ?I
YI
Print name: /" e11-4-
Title:
Address: 1--*'0 ,,qv
Phon
SignE
Date:
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.
,4!!V, a Notary Public for the State of
e.* -.4,4 4 , County of Ja,o4?7r7?*h , do hereby certify that
?' `T?„?.,?s?•+- personally appeared before me this
_ .21d, a-. day of 2©oand acknowledge the due
execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance
requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev. 3 Page 3 of 3