20080433 Ver 1_More Info Received_20080718

WITHERS & RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
111 MacKenan Drive
CARY, NORTH CAROLINA, 27511
[phone]
FAX [phone]
TO: NC-Division of Water Quality
2321 Crabtree Boulevard
Raleigh, NC 27604
WE ARE SENDING YOU
? Shop Drawings
? Copy of Letter
® Attached via
? Prints
? Change order

DATE 7118/08 JOB NO. 2061284.01
ATTENTION Cyndi Karolyn and Ian McMillan
PHONE #
RE: Bradford
Courier
U Plans
? Diskette
_ the following items:
? Samples ? Specifications
COPIES DATE NO. DESCRIPTION
5 Responses for Additional Information
5 DWQ Supplemental worksheets and Design details
5 Photos of the drainageway below BMP3 outfall

JU

THESE ARE TRANSMITTED as checked below:
? For approval ? Approved as submitted
? For your use ? Approved as noted
® As requested ? Returned for corrections
? For review and comment ?
5
t
E:Vn - .N E i 1,A ND 6NFa i ER(?L,4u'r y
S AN{7 ,C7pR,ti"N!TER L? 2RNGh:
E] Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
? FOR BIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS:
Received By:
COPY TO: file
SIGNED: Todd Preuninger
if enclosures are not as noted, kindly notify us at once.
WITHERS cN' RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
July 18, 2008
NC-Division of Water Quality
Attn: Ms. Cyndi Karoly and Mr. Ian McMillan,
2321 Crabtree Blvd. D
Raleigh, North Carolina 27604 JUL
Re: Request for Additional information - Bradford ps?w??sYORM,r?a1ERBRANLH
W&R Project #: 2o61284 VIV
DWQ Project #: o8-0433
Dear Ms. Karoly and Mr. McMillan,
We received your request for additional information regarding the proposed impacts
associated with the Bradford project. I have included a brief response to each of your
requests below.
Your letter asks for the following information:
1) As mentioned in the previous Request for More Information, the proposed BMPs
must be designed to meet state requirements regardless of whether the
stormwater review is being conducted by the Town or Cary or the DWQ. Please
insure that the proposed BMPs include provisions for pretreatment, flowpath
lengths, 3:1 side slopes and other required design elements listed in the DWQ
BMP Manual. BMP #2 in particular must be reconfigured such that the inflows are
combined into a single forebay that comprises approximately 20 percent of the
surface area. Also, please redesign BMP #3 to meet state standards for wet
detention ponds.
As per your request, the BMP's have been re-designed to meet the required
design elements listed in DWQ's BMP Manual. Copies of the revised stormwater
plans and DWQ worksheets are included with the attachments.
2) Please label the level spreaders on the site plans and the Supplement Forms such
that they can be easily identified and cross-referenced.
The level spreaders and supplement forms have been labeled so that they can be
identified and cross-referenced.
3) The filter strip for Level Spreader 1 is too steep on the upslope side. Please
relocate this level spreader downslope where the filter strip is appropriate for
diffuse flow.
Level spreaders has been re-located to a more suitable location.
iii MacKenan Drive i Cary, NC 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenel.com
7040 Wrightsville Avenue i Suite 1o1 i Wilmington, NC 28403 1 tel: [phone] fax: [phone]
Brunswick Surveying 1 1027 Sabbath Home Rd, SW I Supply, NC 28462 1 tel: [phone] fax: [phone]
• Page 2
July 18, 2008
4) Please show how diffuse flow requirements are being met at the outlet of BMP
#3. If you choose to provide a level spreader, then you must submit a completed
Level Spreader Supplement Form (with all required items) for each proposed level
spreader.
Due to the fact that the closest buffered stream is approximatelYg5o feet from the
outlet of BMP3, we do not believe that a level spreader should be required. The
discharge from this outlet will actually be less than the pre-development flows
Additionally, before the stormwater enters the riparian buffers, it will flow through
a relatively flat vegetated filter, and wetlands, further reducing velocity and
providing nutrient/sediment removal. Photos and a topographic map of this
drainageway are included with the attachments.
Please feel free to call if you have questions or require additional information. We trust
that this information will allow you to complete your review of this project.
Sincerely,
WITHERS & RAVENEL, INC.

Todd Preuninger
Senior Biologist
Attachments:
1) DWQ Supplemental worksheets and design details
2) Photos of the drainageway below BMP3 outfall.
?OaOF W ATF?OMCM
G
f
NCDENR
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 Bradford
Contact name Hunter Freeman
Phone number 9191469-3340
Date June 19, 2008
Drainage area number 1
777
r :
HBO to
For Level Spreaders Receiving Flow From a BMP
Type of BMP Wet Pond
Drawdown flow from the BMP 0.37 cis
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
fe
fe
cfs
min
inthr
cfs
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
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 inthr storm?
Length based on the 10-yr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
n (Y or N)
n (Y or N)
n (Y or N)
y (Y or N)
Complete filter strip characterization below.
71.00 ft
0.00 ft
40.00 ft
111.00 ft
328.00 fmsl
324.00 fmsl
3.60 % OK
n (Y or N) OK
0.00 sq ft No forebay is needed.
32 fttcfs
n (Y or N)
n (Y or N)
y (Y or N)
0.40 cfs
y (Y or N) OK
Form SW401-Level Spreader, Fifter Strip, Restored Riparian Buffer-Rev.4 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
15.00 it Level spreader length OK.
n (Y or N)
(Y or N)
(Y or N)
ft
it
It
cis

------------
M
B ?
M
Form SW401-Level Spreader, Fifter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 2 of 2
111r, REQ IRED ITEM 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.
Page/ Plan
InMals Sheet No.
CZ-o 1. Plans (1" - 50' or larger) of the entire site showing:
C&•p _? - Design at ultimate build-out,
_ - Off-site drainage (if applicable),
T1 APACT MAPS - Delineated drainage basins (include Rational C coefficient per basin),
At - C t - Forebay (if applicable),
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROM, and
- Boundaries of drainage easement.
C -0- 3 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.
Clo•D 3. Section view of the level spreader (1" = 20' or larger) showing:
.9 Z_ - Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
&*AeJ 4. A date-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
Cla D 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. TO 13b7 SI E?
8. A copy of the deed restrictions (if required). ONL 67 HoA /S
FS-r-% ?sytA
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Part III, page 1 of 1
_AWA 5 O?aF W a
NCDENR
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)I
N'
t . -
Project name Bradford
Contact name Hunter Freeman
Phone number 919469-3340
Date June 19, 2008
Drainage area number 2

For Level Spreaders Receiving Flow From a BMP
Type of BMP Wet Pond
Drawdown flow from the BMP 0.42 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 cis
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?
f?
fe
cfs
min
in/hr
cfs
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
n (Y or N)
n (Y or N)
n (Y or N)
y (Y or N) Complete filter strip characterization below.
20.00 it
24.00 it
33.00 ft
77.00 ft
329.00 fmsl
327.00 fmsl
2.60 % OK
n (Y or N) OK
50.00 sq ft No forebay is needed.
35 ft/cfs
n (Y or N)
n (Y or N)
y (Y or N)
0.42 cis
y (Y or N) OK
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 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
15.00 ft
n (Y or N)
n (Y or N)
y (Y or N)
4.00 ft
3.00 ft
15.00 ft
1.50 ft
35.00 cfs
Riprap
Level spreader length OK.

------------- .t
M M
B
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Parts I. and II. Design Summary, page 2 of 2
UJ. RE4U ED ITEM, CHECKL,IST ,
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.
In' 'als

A
Pagel Plan
Sheet No.
CZ-0 1. Plans (1" - 50' or larger) of the entire site showing:
CG D -C(n,3 - Design at ultimate build-out,
- Off-site drainage (if applicable),
MP?1" mA - Delineated drainage basins (include Rational C coefficient per basin),
F
b
if
li
bl
-
ore
ay (
app
ca
e),
A) - al - High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
Oil Y-L 3 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.
r!o 3 3. Section view of the level spreader (1" = 20' or larger) showing:
AS - 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.
CID, 3
6. The supporting calculations.
7. A copy of the signed and notarized operation and maintenance (0&M) agreement. 7D $ E S/LIV Erg
8. A copy of the deed restrictions (if required).
15S7A6 LJSR6-,D
ONGE f/0A /S
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.4 Part III, page 1 of 1

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EXISTING BOX CULVERT &
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II
I I; IMPACT A4
II 399 SF-ZONE 2
I
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`JLL IMrl1V 1 MAr h-L rVr% LLVLL
SPREADER LOCATION)
GRAPHIC SCALE x
10 0 25 50 100 E?
O
1 inch = 50 ft.
BRADFORD IMPACT MAP A-1 WITHERS & RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
CARP WAKE COUNTY NORTH CAROLINA 1? 1? __ -1 1111 an Mi,

6" DIP FROM FLOW BYPASS STRUCTURE
(SEE IMPACT MAP A-1 FOR FLOW BYPASS
STRUCTURE LOCATION)
SEE IMPACT MAP A-3 FOREBAY/LEVEL
NOTE: FOREBAY TO BE INSTALLED AFTER
COMPLETION OF GRADING AND RETAINING
WALLS, AND AFTER CONVERSION OF BMP
FROM EROSION CONTROL DEVICE TO WET
POND.
Ex
SPREADER DETAIL GRAPHIC SCALE
50 0 25 50 100
1 inch = 50 ft.
BRADFORD
IMPACT MAP A-2
WITHERS &- RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
NORTH
NOTE:
6" DIP SHALL BE CAPPED UNTIL AFTER
ENTRY FEATURE IS CONVERTED FROM
EROSION CONTROL DEVICE TO WET POND
/'0-RING' GASKE
TED
CLASS 111 RCP
42" DIAMETER
FLOW FROM BMP 12
----------
'O-RING' GASKETED
CLASS 111 RCP
24 DIAMETER
FLOW FROM ENTRY FEATURE
WEIR WALL
SEE NOTE
'O-RING' GASKETED)
CLASS Ill RCP 6" DIP TO
42" DIAMETER LEVEL SPREADER /2
FLOW FROM BMP IJt2 (SEE N07F)
SPUTTER BOX (JB 431) PLAN VIEW
(FLOW BYPASS STRUCTURE)
NTS
PIPE FROM BYPASS STRUCTURE
3
SPUTTER BOX (JB 431) SECTION
(FLOW BYPASS STRUCTURE)
NTS
'O-RING' GASKETED
CLASS 111 RCP
42" DIAMETER
TO STREAM
24" CURB & GUTTER (3,000
PSI MIN COMPRESSIVE
STRENGTH)
0.00% SLOPE ON TOP OF
GUTTER (FLAT SLOPE)
SEE PLAN FOR LEVEL
SPREADER LENGTH
LEVEL SPREADER LIP ELEVATION=
4"-6" HIGHER EXISTING SLOPE ON
DOWNSTREAM SIDE
DIFFUSED FLOW
THROUGH BUFFER
3'-0"
INSTALL CLASS B RIP RAP
FROM OUTLET TO BOTTOM
OF FOREBAY 18" MIN
DEPTH, 3' WIDE WITH
GEOTEXTILE LINER
54" I.D. JUNCTION BOX
'O-RING' GASKETED
CLASS III RCP
24" DIAMETER
FLOW FROM ENTRY FEATURE
r
6" DIP TO
LEVEL SPREADER
(SEE NOTE)
WEIR WALL
(8" WIDTH)
12
'O-RING' GASKETED CLASS III RCP
42" DIAMETER
TO STREAM

..
n • . - n

NOTE: FOREBAY TO BE INSTALLED AFTER COMPLETION OF
GRADING & RETAINING WALLS AND AFTER CONVERSION OF
BMP FROM EROSION CONTROL DEVICE TO WET POND.
L-#57 WASHED STONE -
COMPACTED
COMPACDE 4" THICK (MIN)
PERMAMENT GEOTEXTILE
UNDERLINER
NOTE: FOREBAY NOT REQUIRED DUE TO LOW
FLOW FROM DRAWDOWN ORIFICE TYPICAL FOREBAYILEVEL SPREADER DETAIL
NTS
BRADFORD
IMPACT MAP A-3
WITHERS &- RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
IMPACT B l
723 SF-ZONE

0
NOTE: FOREBAY TO BE INSTALLED AFTER SEE IMPACT MAP B-2 FOREBAY/LEVEL
COMPLETION OF GRADING AND RETAINING SPREADER DETAIL
WALLS, AND AFTER CONVERSION OF BMP
FROM EROSION CONTROL DEVICE TO WET
POND.
GRAPHIC SCALE
x
50 o 25 50 100
O
1 inch = 50 ft. Z
BRADFORD
IMPACT MAP B-1
WITHERS &- RAVENEL
ENGINEERS I PLANNERS 1 SURVEYORS
NORTH CAROLINA

(> \
?tip?e( ?94,FIJ \
SANITARY SEWER ss \`
EASEMENT \`\ \
s
\ \
`,\ ss \?_\\ LINEAR\
TEMPORARY IMPACT C 1=-;- WETLAND
77 SF-WETLAND
EPHEMERAL STREAM
SS\
(NON-JURISDICTIONAL) SS
US ARMY CORPS OF ENGINEERS \SS
JURISDICTIONAL DETERMINATION
SAW-2006-32870-292 \
0
R
sS
\ \ SS.
WETLAND
US ARMY CORPS OF ENGINEERS
JURISDICTIONAL DETERMINATION
SAW-2006-32870-292
AREA: 0.025 ACRES (1087 SF)
GRAPHIC SCALE
50 0 25 50 100
1 inch = 50 ft.
BRADFORD
NORTH CAROLINA
IMPACT MAP C-1
H
O
Z
WITHERS & RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
I L Or r' r1 L I ITTr' L 1T 1'+T Pfr AL•
0? W A7- RQ Michael F. Easley, Governor
y William G. Ross Jr., Secretary
?- North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
June 16, 2008
DWQ Project # 08-0433
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Jeff Furman
Crosland, LLC
4000 Westchase Boulevard, Suite 390
Raleigh, NC 27607
Subject Property: Bradford
Ut to Turkey Creek [030402, 27-33-2, C, NSW]
REQUEST FOR MORE INFORMATION
Dear Sir or Madam:
On May 9, 2008, the Division of Water Quality (DWQ) received your revised application dated
May 9, 2008, to fill or otherwise impact 0.001 acres of 404/wetland and 1,914 square feet of
Zone 1 Neuse River basin protected riparian buffers, and 4,141 square feet of Zone 2 Neuse
River basin protected riparian buffers to construct the proposed residential development. 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:
As mentioned in the previous Request for More Information, the proposed BMPs must be
designed to meet state requirements regardless of whether the stormwater review is being
conducted by the Town or Cary or the DWQ. Please insure that the proposed BMPs
include provisions for pretreatment, flowpath lengths, 3:1 side slopes and other required
design elements listed in the DWQ BMP Manual. BMP #2 in particular must be
reconfigured such that the inflows are combined into a single forebay that comprises
approximately 20 percent of the surface area. Also, please redesign BMP #3 to meet
state standards for wet detention ponds.
2. Please label the level spreaders on the site plans and the Supplement Forms such that they
can be easily identified and cross-referenced.
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: httph2venr ?tatc nc u? ncw?tlands
NorthCarolina
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Crosland, LLC
Page 2 of 2
June 16, 2008
3. The filter strip for Level Spreader 1 is too steep on the upslope side. Please relocate this
level spreader downslope where the filter strip is appropriate for diffuse flow.
4. Please show how diffuse flow requirements are being met at the outlet of BMP #3. If
you choose to provide a level spreader, then you must submit a completed Level Spreader
Supplement Form (with all required items) for each proposed level spreader.
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.
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 Ms. 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
CBK/ijm
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Todd Preuninger, Withers & Ravenel, 111 MacKenan Drive, Cary, NC 27511
Filename: 080433Bradford(Wake)0n_Ho1d2