20070309 Ver 1_More Info Received_20070821

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:'W E' BURDETTE LAND CONSULTING, INC.
308D W Millbrook Road, Suite 200 -Raleigh, North Carolina 27609
Telephone [phone] -Fax [phone]
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August 21, 2007
Mr. Ian McMillan
401 Oversight/Exp Review Permitting Unit
North Carolina Division of Water Quality
2321 Crabtree Boulevard, Suite 250
Raleigh, North Carolina 27604
RE: Additional Information Requested
Blalock's Glen Subdivision
DWQ Project # 07-0309
BLC Project #: 60030
Dear Mr. McMillan:
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We received NC Division of Water Quality's August 3, 20071etter requesting additional
information regarding stormwater management for the subject project. Each comment is
addressed below.
1. Grass swale 1 was redesigned to provide 100 feet of swale per acre of drainage
area. The corrected worksheet is attached.
2. Although the existing slope at grass swales 3 and 4 are greater than five percent,
the swales will be graded and constructed with slopes that do not exceed four
percent.
3. Riprap dissipator 7 has been moved so that it is directly adjacent to the wetland
that we discussed with Annette Lucas on August 9, 2007.
4. Dated, labeled photographs of the buffer vegetation downslope of every proposed
level spreader are attached. Due to the presence of a wooded buffer, level
spreaders 1 and 5 were re-designed to include bypass swales. New worksheets for
all of the proposed level spreaders are attached.
Also, attached is a full-size sheet of the revised project plan at a scale of 1" = 100'.
Because of the project size, we have also include an 11x17 key sheet of the project
showing the locations of larger scale insets (1" = 60') to aid in the review process.
Revised Insets A, C, E, and G and bypass details are also attached. If you have any

Mr. Ian McMillan
August 21, 2007
Page 2 of 2
questions or require more information, please do not hesitate to contact me at (919) 841-
9977.
Sincerely,
BURDETTE LAND CONSULTING, INC.
~- >lj
Jennife . Burdette
Environmental Specialist
Attachments
c: Lester Stanch -Stanch & Associates
Keith Roberts -Development Consulting Svs

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~;~SURF ~ WATERS & WETLANDS OVERALL IMPACT MAP
ADDED STORMWATER INFORMATION INSETS F & G 6/19/07 ~ ~ n ~> -'.i
~~ ~-~. BLA.LOCK'S GLEN SUBDIVISION
ADDED STORMWATER INFORMATION INSETS C, E, & G 8/20/07 ti ~7 i~"~`'~j TRIPLE J DEVELOPMENT LLC
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= BURDETTE LAND CONSULTING, INC. ``~-'-~ DRAWN BY: TMB
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308-D W Millbrook Road, Suite 200 -Raleigh, North Carolina 27609 - J CHK'D BY: JAB
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•'-'N"•- DATE: 04/18/07 CHK'D BY: JAB
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• S Telephone [phone]- Fax [phone] PROJECT #: 60030 INSET A

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i $URDETTE LAN CONSULTING INC. DRAWN BY. TMB REVISED:
' W E 308D W Millbmok Road, Suit 200 -Raleigh, North Carolina 27609 6/19/07
S •• Telephone [phone]-Fax [phone] PROJECT #: 60030 INSET C

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SUBDIVISION
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TRIPLE J DEVELOPMENT, LLC
FUQUAY-VARINA, WAKE COUNTY, NC
''~~N~~'' DATE: 04/18/07 CHK'D BY: JAB

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E . DRAWN BY: TMB REVISED:
308 D W Millbrook Road, Suit 200 -Raleigh, North Carolina 27609 6119/07

Telephone (919) 84 -
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9977- Fax [phone]
PROJECT #: 60030
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Aug,20~ 2001 1:12AM
REVISED LEVEL SPREADER ~t AND #5 CALCULATIONS
BLALOCKS GLEN SUBDIVISION
WAKE COUNTY, NORTH CAROLINA
SUBMITTED BY: DEVELOPMENT CONSULTING SERVICES, INC,
140] AVERSBORO ROAD, SUITE 206
GARNER, NC 27529
[phone]
FAX [phone]
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No~0285 P. 1

Recei~~ed 09 20 2007 09:30 '
Rug•20. 2001 7~12RM No~0285 P, 2
DIVISION OF WAT R QUALITY • LEVEL SPREADER WORKSHEET (112007)
I. PROJECT INFORMATION (please omplete the following information):
Project Name : ~.Al. N
Contact Person; Phone Number: (q~) ~ ~"Q~II
Level Spreader ID:
Level Spreader Length ~/~ ft. (perpendicular to flow)
Drainage Area 'Z • ac. (on-site and oft-site drainage to the level spreader)
Impervious Area ac. (on-site and off-site drainage to the level spreader)
Forebay Area 20 cu ft. (0.2% of the contributing impervious surface area)
Maximum Filter StriplBuffer Slope d• % (6% for forested/leaf littler cover, 8% for grass/thick cover)
Max, Discharge from 1"IHr Storm cfs
Max. Discharge to Level Spreader cfs (Discharge rate from extended detention wetland or pond)
Filter Strip/ Zone 1 Buffer Vegetation ~ (Grassl7hlck ground cover or Forested)
Filter Strip/ Zone 1 Buffer Width ft.
Filter SVlpl Zone 2 Buffer Vegetation -
FilterStrip/ Zone 2 Buffer Width ft.
Bypass Method Used ~ Please include a worksheet for this.
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate t e following design requirements have been met and supporting documentation is
attached. If a n3quirement has not bean et, please explain why. At a minimum, a complete storrnwater management plan
submittal includes a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet
structure details, a detailed drainage pl n and a fully executed operation and maintenance agreement. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and approval of
fhe protect.
Applicants Initials
Project Slte was vl Ited prior to designing level spreader system.
.~'~, Bypass conveyance ethod is specified and construction details and calculations are provided.
nl}~~ Alternative design op ion is specified and plan details and calculations are provided.
~'mP Discharge to level sp ader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
Construction details f r the bypass and outlets are provided.
b Date o1 the Site visit. Please attach time-dated dlpltal photos of existing buffer conditions.
R'~2 Level spreader lengt is at least;13 ft. per cfs for thick ground cover /grass; OR 65 ft per cfs for 50-
foot canopied forest Ith leaf litter; 50 ft per cfs for 100-foot forested buffer, 40 ft. per cfs for 150-foot
forested buffer; OR weighted average of the two vegetation types within the buffer/filter strip).
,(ri~0 All ground cover typ s and their widths hav® been labeled on the construction plans,
~~ All contours have be n depicted on the construction plans.
~s.r2 No structures are loc tad in protected buffers (must meet no practical alternatives criteria).
_ ~~/~ No draws are locate in the buffer or filter strip in the vicinity of the proposed level spreader.
Construction details r the level spreader have bean provided.
The operation and m intenance agreement signed and notarized by the responsible party is provided.
~ No practical altemati es explanation + Variance request. (Level Spreaders in Series only).
Bypass method used:

Received 08 20 2007 09:30
Aug.20. 2001 7:13AM
DIVISION OF WA'
I. PROJECT INFORMATION (please
Protect Name : I
Contact Person:
Level Spreader ID; ~
Level Spreader Length
Drainage Area
Impervious Area
Forebay Area
Maximum Filter StriplBuffer Slope
Max. Discharge from 1 "!Hr Storm _
Max. Discharge to Level Spreader _
Filter Strip/ Zone 18uffer Vegetation
Filter Strip/ Zone 1 Buffer Width _
Filter Strip/ Zone 2 Buffer Vegetation,
Filter Stripl Zone 2 Buffer Width _
Bypass Method Used S
II. REQUIRED ITEMS CHECKLIST
Initial In the space provided to Indicate t
attached. If a requirement has not been
submittal includes a worksheet for each
structure details, a detailed drainage pl
submifta! package will result in a reques
the project.
Aaplicants Initials
,~~. ProJoct Site was vi.
St `fs ~b'~ Date of the Sife visit
Level spreader leng~
foot canopied forest
forested buffer, OR
t`mR All ground covertyp~
~~_ All contours have be
No structures are loc
No draws are locate
Construction details
The operation and rr
No practical alternat
Bypass mAthod used;
Bypass conveyance
Alternative design of
Discharge to level s
bypass discharge.
No•0285 P. 3
QUALITY • LEVEL SPREADER WORKSHEET (112007)
the following Information):
Phone Number:
ft. (perpendicular to flow)
ac, (on-site and off-site drainage to the level spreader)
ac. (on-site and off-site drainage to the level spreader)
cu ft. (0.2% of the contributing impervious surface area)
°1° (t3% for forestedlleaf littler cover, 8% for grasslthick cover)
cfs
cfs (Discharge rate from extended detention wetland or pond)
(GrasslThick ground cover or Forested)
ft.
ft.
Please include a worksheet for this.
a following design requirements have been met and supporting documentation is
yet, please explain why. At a minimum, a complete stormwater management plan
3MP, design calculations, plans and specifications showing all BMPs and outlet
n and a fully executed operation and maintenance agreement, An incomplete
for additions! information and will substentially delay final review and approval of
ted prior to designing level spreader system.
Please attach time~dated digital photos of existing buffer conditions.
is at least: l3 ft. per cis for thick ground cover /grass; OR 65 ft per cfs for 50-
rith leaf litter, 50 ft per cfs for 100-foot forested buffer; 40 ft, per cfs for 150-foot
weighted average of the two vegetation types within the bufferlfilter strip}.
and their widths have been labeled on the construction plans,
n depicted on the construction plans.
~ted in protected buffers (must meet no practical alternatives criteria).
in the buffer or filter strip in the vicinity of the proposed level spreader.
~r the level spreader have been provided.
intenance agreement signed and notarized by the responsible party is provided.
9s explanation + Variance request. (Level Spreaders In Series only).
rod is specified and construction details and calculations are provided.
is specified and plan details and calculations are provided.
ader and subsequent filter strip is hydraulically and spatially separate from the
Construction details fir the bypass and outlets are provided.

Received OB 20 2007 09:31
Rug•20. 2001 1~13AM
~CEYEL SP~~'~;~2 s~ ~ ~~ ~lfHa.S

No,0285 P• 4

~ f,l~e~s
o~
~C v C1 ,~,~~~Y2
~'~- CIS ~ (.~)~
(~ ~r~)- 5~ ~~
1 w~ i.~,~~jss

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Received 08 20 2007 13:41
Aug~20. 2001 11:23AM
DIVISION OF WA'
No~0292 P• 1
QUALITY • LEVEL SPREADER WORKSHEET (112007)
I. PROJECT INFORMATION (please
Protect Name : ~
Contact Person: ~ ~
Level Spreader ID;
Level Spreader Length
Drainage Area
Impervious Area
Forebay Area
Maximum Filter Strip/Buffer Slope
Max. Discharge from 1"IHr Storm _
Max. Discharge to Level Spreader _
Filter Strip/ Zone 1 Buffer Vegetation
Filter Strlpl Zone 1 Buffer Width _
Filter Stnp/Zone 2 Buffer Vegetation,
Filter Strip/ Zone 2 Buffer Width _
Bypass Method Used
the following information):
Phone Number:
ft. (perpendicular to flow)
ac. (on-site and off-site drainage to the level spreader)
ac. (on-site and off-site drainage to the level spreader)
cu ft. (0.2% of the contributing impervious surface area)
(6% for forestedlleaf littler cover, 8% for grass/thick cover)
cfs
cfs (Discharge rate from extended detention wetland or pond)
(Grass/Thick ground cover or Forested)
a b ft.
ft.
Please include a worksheet for this.
II. REQUIRED ITEMS CHECKLIST ~,
Initial in the space provided to indicate ttje following design requirements have been met and supporting documentation is
attached. !f a requirement has not been brat, please explain why. At a minimum, a complete stormwater management plan
submittal includes a worksheet for each !BMP, design calculations, plans and specifications showing all BMPs and outlet
structure details, a detailed drainage pldn and a fully executed operation and maintenance agreement. An incomplete
submittal package will result In a request for additional information and wilt subsfantially delay final review end approval of
fhe project.
A licants Initials
~ Protect Slte was vl~
~' Date of the Site visit
Level spreader lengi
foot canopied forest
forested buffer; OR
All ground cover typ
,~,~v-e All contours have be
No structures are log
No draws are locate
Construction details
The operation and n
No practical altemat
Bypass method used:
tad prior to designing level spreader system.
Please attach time-dated digital photos of exlstlnp buffer conditions,
is at least:13 ft. per cfs for thick ground cover 1 grass; OR 65 ft per cfs for 50-
iith leaf litter; 50 ft per cfs for 100-foot forested buffer; 40 ft. per cfs for 150-foot
weighted average of the two vegetation types within the bufferlfilter strip),
and their widths have been labeled on the construction plans.
n depicted on the construction plans.
iced in protected buffers (must meet no practical alternatives criteria).
in the buffer or filter strip in the vicinity of the proposed level spreader,
~r the level spreader have been provided.
iintenance agreement signed and notarized by the responsible party is provided.
es explanation + Variance request. (Level Spreaders in Series only).
Bypass conveyance method Is specified and construction details and calculations are provided.
Alternative design o tion is specified and plan details and calculations are provided.
Discharge to level s~reader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
Construction detailsforthe bypass and outlets are provided.

Received 08 20 2007 13:41
Rug•20. 2001 11~23AM
DIVISION OF WA'
No•0292 P. 2
QUALITY -LEVEL SPREADER WORKSHEET {112007)
I. PROJECT INFORMATION (please
Project Neme : ~LR2.e(~~ G~
Contact Person:
Level SpreaderlD:
Level Spreader Length
Drainage Area
Impervious Area
Forebay Area
Maximum Filter StriplBuffer Slope
Max. Discharge from 1 "IHr Storm -
Max. Discharge to Level Spreader _
Filter Stripl Zone 1 Buffer Vegetation
Filter Stripl Zone 1 Buffer Width -
FilterStripl Zone 2Buffer Vegetation
Filter Strip/ Zone 2Buffer Width -
Bypass Method Used
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to Indicate th
attached, If a requirement has not been i
submittal includes a worksheet for each
structure details, a detailed drainage ply
submittal package will result in a requesf
the protect.
Applicants Initials
0
Yn,2
- Y.m<
Ym,[
~M
omplete the following information):
U
2'f4 Phone Number: ( ) 6 Z~'- O I I
,~_ ft. (perpendicular to flow)
S$ ac. (on-site and off-site drainage to the level spreader}
3`I ac. (on-site and off-site drainage to the level spreader}
~ cu ft, {0.2% of the contributing impervious surface area)
~_ % (6% for forested/leaf littler cover, 8% for grasslthick cover)
cfs
cfs (Discharge rate from extended detention wetland or pond)
(GrasslThick ground cover or Forested)
ft.
P_ ft.
Please include a worksheet for Phis.
following design requirements have been met and supporting documentation is
at, please explain why. At a minimum, a complete stormwater management plan
VIP, design calculations, plans and specifications showing all BMPs and outlet
and a fully executed operation and maintenance agreement. An incomplete
~r additional information and will substantially d®lay final review and approval of
Project Slte was vls~ted prior to designing level spreader system.
Date of the Site visit. Please attach tlme•deted digital photos of existing buffer conditions.
Level spreader length is at least:13 ft. per cfs for thick ground cover I grass; OR 65 ft per cfs for 50-
footcanopied forest ~uith leaf litter; 50 ff per cfs for 100-foot forested buffer; 40 ft. per cfs for 150-foot
forested buffer; OR a weighted average of the two vegetation types within the buffer/filter strip).
All ground cover type's and their widths have bean labeled on the construction plans.
All contours have been depict®d on the construction plans.
No structures are located in protected buffers (must meet no practical alternatives criteria).
No draws are located, in the buffer or filter strip in the vicinity of the proposed level spreader.
Construction details fpr the level spreader have been provided.
The operation and m intenance agreement signed and notarized by the responsible party is provided.
No practical alternatives explanation + Variance request. (Level Spreaders in Series only).
Bypass method used:
Bypass conveyance ethod Is specified and construction details and calculations are provided.
Alternative design op ion is specified and plan details and calculations are provided.
Discharge to level sp~eader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
Construction details fir the bypass and outlets are provided.

Received OB 20 2007 13:41
Rug~20. 2001 11~24AM
No•0292 P. 3
DIVISION OF WATER QUALITY • LEVEL SPREADER WORKSHEET (112007)
I, PROJECT INFORMATION (please
Project Name ; Z ~a K
Contact Person: s ~~
Phone Number: ( ) ~ 25 - a 411
LevelSpreaderlD: ~
Level Spreader Length ~ I~'L ft.
Drainage Area ~- `4 ac.
Impervious Area ~ G ~ ac.
Forebay Area ., '~5'~ cu ft.
Maximum Filter Strip/Buffer Slope 8
Max. Discharge from 1"/Hr Storm ' /, 1 cfs
Max. Discharge to Level Spreader Iq. ! cfs
Filter Strip/ Zone 1 Buffer Vegetation fi~i ~h
Filter Strip/ Zone 1 Buffer Width Zu ft.
Filter Strip! Zone 2 Buffer Vegetation '~ IGc
Filter Stripl Zone 2 Buffer Width 3d ft.
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(0.2% of the contributing impervious surface area)
(6% for forestedlleaf littler cover, 8% for grasslthlck cover)
(Discharge rate from extended detention wetland or pond)
(GrasslThick ground cover or Forested)
Bypass Method Used PRA-`hREA7rn1~T Please include a worksheet for this,
II. RE4UIRED ITEMS CWECKLIST ~,
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is
attached. If a requirement has not been ~ ef, please explain why. At a minimum, a complete stormwater management plan
submittal includes a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet
structure details, a detailed drainage pl n and a fully executed operation and maintenance agreement. An incomplete
submittal package will result in a reques~ for additional information and will substantially delay Bnal review and approval of
the project. ',
Applicants Initials
Protect Slte was vl
I~ Date of the Site visit
Level spreader long
foot canopied forest
forested buffer; OR
I!-rrK_ All ground cover typ
{[~~ All contours have bE
~~ No structures are log
~_ No draws are locate
Construction details
The operation and n
No practical altemal
Bypass method used;
the following information):
~Ited prior to designing level spreader system.
Please attach time-dated digital photos of existing buffer conditions.
h is at least:13 ft. per cfs for thick ground cover /grass; OR 65 ft per cfs for 50-
with leaf litter; 50 ft per cfs for 100-foot forested buffer; 40 ft. per cfs for 150-foot
~ weighted average of the two vegetation types within the buffer/filter strip).
's and their widths have been labeled on the construction plans.
en depicted on the construction plans.
sated in protected buffers (must meet no practical alternatives criteria).
i in the buffer or filter strip In the vicinity of the proposed level spreader.
for the level spreader have been provided,
iaintenance agreement signed and notarized by the responsible party is provided.
vas explanation + Variance request, (Level Spreaders in Series only).
Bypass conveyance~method is specified and construction details and calculations are provided.
Alternative design o tion is specirfed and plan details and calculations are provided.
Discharge to level s~reader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
Construction detallsfor the bypass and outlets are provided.

Level spreader # 1 photo
View from level spreader down slope.
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Level spreader # 2 photo
View from level spreader down slope.

Level spreader # 3 photo
View from level spreader down slope.
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Level spreader # 4 photo
View from level spreader down slope.

Level spreader # 5 photo
View from level spreader down slope.

DWQ Project No
DMSION OF
I. PROJECT INFORMATION (please
Project Name : Q ~A o (,<S
Contact Person; ~JAd/J~ ~/.
Swale ID: w ~ ~
Grass Swale Length
Tributary Drainage Area
Impervious Area
Max. Velocity From 2 Yr. Storm
Max. Velocity from 10 Yr. Storm
Mln. side slopes
Steepest Effective Slope
Cover Crop
II. REQUIRED ITEMS CHECKLIST
0 7- 0.
QUALITY • GRASSEQ SWALE WORKSHEET
the following information):
,/~~_, Phone Number (g!9 } S~~ -!~32i
,= ft. (at least 100 ft per tributary acre)
ac. (on-sife and off-site drelnage to the Swale)
ac. (on-site and off-site drelnage to the Swale}
~_ fps (2 fps max.)
fps
ratio (3:1 min.)
tuft (check dams maybe used)
Initial in the space provided to indicate the folio ng design requirements have been met and supporting documentation is attached. if a
requirement has not been met, etfech an expla atlon of why. Al a minimum,. a complete stormwater management plan submittal Includes
a worksheet for each BMP, design calculati s, plans and specifications showing all BMPs and Dull®t structure details, a detailed
drelnage plan end a fully executed operation a d maintenance agreement. An incomplete submittal package will result in a request for
additional Information and will substantlslly del y final review and approval of the project.
II nts Initials
X.~r~ Vegetation Plan provide
K~ The underlying soils ar
/CM,C Swale carries only stor
,Ci-~,~ Water table depth is gr
Kh.~ Plan details for the swe
KM~C Plan details for the Inge
k',K1C Check dams provided.
rU+~ The operation and mall
annual mowing.
I'c~lZ The operation and mail
I on plans
permeable and non-compacted
water flow
afar than 1 foot,
provided,
end outlets are provided,
agreement includes annual erosion end vegetation repair, and at least twice
agreement signed end notarized by the responsible party is provided.

TRASH RACK
6' PVC (TO LEVEL SPREADER)
6" HIGH W IR
4' LENGTH 18' RCP (TO CREEK)
'x4' BYPASS STRUCTURE
NTS
LEVEL SPREADER
1'x2'x18" PAD
D50=6"
16 L.F. OF 6" PVC
PIPE FROM STREET /-18" RCP TO CREEK
6" HIGH EIR 4'x4' BOX
4' LENGT
BYPASS STRUCTURE
PLAN VIEW (N.T.S.) FIGURE 4