20070666 Ver 2_More Info Received_20080117

R
r
C ENGINEERING
TRANSMITTAL LETTER
TO: Mr. Ian McMillan
NCDENR- Division of Water Quality
401/Wetlands Unit
2321 Crabtree Blvd
Raleigh, NC 27604
Wear transmitting:
Attached
^ Under Separate Cover
^ Via email / ftp
The fol~wing items:
®' Plans
^ Drawings
^ Application/Fee
CH Engineering, PL ~ ~~ ~~~° D
4601 Lake Boone Tr D 1~~ k~
Raleigh, NC 27607
919.788.0224 SAN ~ 7 2.008
919.788.0232 (fax)
nENR - Wp1 k" ;nu tER BRF~
„~.....
DATE JOB NO:Jan. 17, 200
RE: Broughton Properties
Deliver d via:
Courier
^ Overnight Delivery
^ Mail
^ Plats
^ Specifications
^ hop Drawings
Other
^ Digital Files
^ Change Orders
^ Documents
COPIES DESCRIPTION
1 Memorandum Dated Jan 10, 2008
1 each Letter from DWQ dated Nov. 20, 2007
Level Spreader Worksheets & Checklists
Supporting Calculations
Section View of Spreader
Level Spreader Construction Sequence
Level S reader/Filter Stri Ins ection and Maintenance A reement
5 sets Oak Forest Drive Extension Plans (full size)C-2, PP-1, PP-2
For Approval
^ For Your Use
^ As Requested
^ For Distribution
^ Approved as Submitted
^ Approved As Noted
^ Returned for Revisions
^ For Review and Comment
Cc: Mr. Ed Bailey
Signed
~-e--

CH Engineering
4601 Lake Boone Trail Ste 103
Raleigh, NC 27607
Date: January 10, 2008
Memo To: Mr. Ian McMillan
NCDENR-DWQ
401 Oversight/Express Review Permitting Unit
1650 Mail Services Center Raleigh, NC 27699-1650
Ph: 919-788-0224
fax: [phone]
From: Ms. Maha Chambliss, PE
CH Engineering
Cc: Ed Bailey
Subject: Broughton Properties Subdivision and Oak Forest Drive Extension Water
Quality Certification for Stream Crossing.
DWQ project #07-0666, ver. 2
Wake County
Dear Mr. McMillan:
Thank you for arranging and meeting with me Dec. 10, 2007 to discuss the subject
project and specifically about your Nov. 20, 2007 letter regarding this project. Please
extend my thanks to Ms. Annette Lucas and Mr. Joseph Gyamfi for attending as well.
This letter serves as a summary of our meeting, if there are any inaccuracies in this
letter please advise. Discussed in our meeting was the November 20, 2007 letter from
your office. The letter had four bulleted items that were state as deficient.
• The first item requested that a proposed lot layout be overfayed on the site plan.
Clarification/response : The lots were identified on the plans, consensus was reached
that no further modifications or clarifications are necessary.
• The second item in the letter requested location of proposed stormwater
management practices.
Clarification/response: Identified location of BMPS is sufficiently shown on plans.
Consensus was reached that no further modifications or clarifications are necessary.
The third item in the letter requested detail for the stormwater management
practices.
,~

.
Pale 2
Clarification/response: Consensus was reached that a note be added to the plans
stating that the BMPs shall be Bioretention Basins.
• The fourth item in the letter requested that diffuse flow measures be provided on
the plans.
Clarification/response: Much discussion revolved around this item. Ms. Annette
Lucas offered the following advise.
a) Offsite stormwater can be separated from on-site stormwater.
b) Only on-site stormwater requires dissipation measures.
c) Discharge pipe between lots 10 and 11 can be discharged with two level
spreaders dissipating the flow. The level spreaders cannot be placed on
slopes that exceed 8 percent.
Mr. McMillan and Ms. Annette Lucas concurred that no resubmitted fees will be required
for this project. This project was in mid review when the new regulations took effect so
Mr. McMillan felt it would be fair to waive resubmittal fee.
It was also agreed, that an enlargement of areas where proposed level spreaders and
storm pipes, will be provided in addition to the overall plan. Recognizing that the overall
plan is for orientation purposes only (this has been accomplished by providing 2
additional plan and profile sheets (PP-1 and PP-2).
Thanks for your time and input on this matter.

F Vv H T~9
~~0 ~iG Michael F. Easley, Governor
~ ~ William G. Ross Jr„ Secretary
>_ y North Carolina Department of Environment and Natural Resources
O ~
Coleen H. Sullins, Director
Division of Water Qua(iry
November 20, 2007
DWQ Project ;# 07-0666, Ver. 2
Wake County
CERTIFIED MAIL; RETURN RECEIPT REQUESTED
Broughton Properties t"c~,'r ~ .
P.O. Box 464 ©`-~ "
Raleigh, NC 272602 ~ ~N ~ Q ~~~~
Sub'ect Pro e
J P ny: Oak Forest Road Extension °~" ~o~°~MwAE ~P~ac~
Ut to Perry Creek [03 0402, 27-25-(2), C, NSW] ~`~ p ~ ~ ~ ~~ ~ D
RETURN OF APPLICATION JAN l 7 2008
Dear Sir oT Madam: DENR - WATER QuAUTY
lNETI~S ANp ~Dr~WATER F3RANCN
On November 9, 2007, the Division of Water Quality (DWQ) received.your application dated
November 8, 2007 to impact 1371inear feet of perennial stream and 7,486 square feet of Zone 1
Neese River basin protected riparian buffer and 4,297 square feet of Zone 2 Neese River basin
protected riparian buffer to construct the proposed road through the site which is to be developed
as a residential subdivision. Your application was unacceptable due to the following items:
1. You did not adequately address DWQ comment nos. 3, 7, 8 and 10, from the DWQ
correspondence dated April 27, 2007, that was sent to you (additionally resubmitted plans
must be at a scale of no smaller than 1 "=50'). These comments are listed below:
Indicate proposed lot layout as overlays on the site plan.
® Provide the location of any proposed stormwater management practices as required by
GC3 631.
® Please provide detail for the stormwater management practices as required by GC3631.
Please indicate the diffuse flow provision measures. on the site plan.
For these reasons your permit application is hexeby considered returned. Once you have
redesigned your project to address the problems and inadequacies with your application as it was
submitted, you will need to reapply for DWQ approval. This includes submitting a complete
application package with the appropriate.
401 Qversight/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: httb://h2o enr state nc us/ncwetlands
No°i~thCarolina
~aturallt~
An Equal Opportunity/Affirmative Action Employer - SO% Recycled/10% Post Consumer Paper

Broughton Properties
Page 2 of 2
November 20, 2007
Please be aware that you have no authorization under Section 401 of the Clear Water Act for this
activity and any work done within waters of the state would be a violation of North Carolina
General Statutes and Administrative Code. Please call Ms. Cyndi Karoly or ~Ir. Ian McYlillan at
919-733-1786 if you have any questions or concerns.
Sin ly,
Cyndi Karoly, Supervisor
O 1 OversightlExpress Review Permitting Unit
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
CH Engineexing/Maha Chambliss, P.O. Box 30128, Raleigh, NC 27622
Filename: 070666Ver20akForestRoadExt(Wake)Returned_Appiica tiou
~J

'~~
NC~ENR
of w.4rF9
>_ f LfW~h r
p Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled oui, printed and submitted.
The Required Items Checklist (Part IIIJ must be printed, filled out and submitted along with all of the required information.
--
!I: PFiOJECT'tNFORMATION; '
_._ _ _ . ,
Project name D/-~ K - -- _
ro~~ ST ,20~~ ~XT~iUs.~,J
Contact name /lei.-,~;! c L~~ p ~ f e,r-~ ~,v~ r,~1~z--~-s,v~
Phone number q I ~ _ 7 yy _ ~ a~~
Date I ~ tO ~ c' S~
Drainage area number '0_
II__ DESIGN INFt7RMATCON
For Level Spreaders Receiving Flow From a BMP
Type of BMP
Drawdown flow from the BMP
~r~
~_ 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 flaw from the 10-yr storm
Where Does the Level Spreader Discharge?
To a bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
-- -
J~p ftZ
1!
o, g~ s s
(, / / cfs
~ O min
~, ~a in/hr
,jl (o (,~ cfs
~; (Y or N)
~ (Y or N)
~' (Y or N)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ~ft
Width of dense ground cover ft
Width of wooded vegetation ft
Total width ~_ft
Slope (from level lip to to top of bank) ~/
Are any draws present? /~ f (Y or N)
Level Spreader Design
Forebay surface area / 6 f sq ft
Feet of level lip needed per cfs y ~_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, 24-hr storm? ~
~~
~ (Y or N)
Length based on the BMP discharge rate? fJ (Y or N)
Design flow ~ ~ (p (p cfs
Is a bypass device provided? /~,I (Y or N)
`
Length of the level lip ~
~~~~ ft
Are level spreaders in series? /v (Y or N)
H'
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 or 2

III. REQUIRED ITEMS.CHEOKLIST
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
Initials Sheet No,
~~
~~i C/ ~ ~ r
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),.
- Fligh flow bypass system,
-Maintenance access,
- Recorded 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,
- Recorded drainage easement, and
- Design at ultimate build-out.
i~ ~~~~~. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
~ ~~ 4. Adate-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
Tv ~~S ~ ~n c l r't~cc~.
y~ Q~ i~ __//~J~.f''~ `f 5. An assurance that the installed system will meet design specifications upon initial operation once the
~"- UJGJ~a ervfr project is complete and the entire drainage area is stabilized.
!~7~ 4%~-°~6. A construction sequence that shows how the level spreader will be protected from sediment until the entire
IMtt;;~~ drainage area is stabilized.
'CJ's C ~l ~ ~ 5
P~ I 2 7. The supporting calculations.
~~~c~E~ 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
rYZ ~ >l~ 9. A copy of the deed restriction.

Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1

~iC~E~R
C~QF W,4TFAQG
j ~~r
O '.111111..................ffffff~~v T
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111J must be printed, filled out and submitted along with al! of the required information.
I::~ PRO'JEGT~ tNFORMAT[ON ,:
Protect name... C~P-~. FdP~ST l~~r~i~. ~aciut~tr,~ j _,
Contact name }'(/ep~,~ ~, L« '~~ / C/~ ~nl ~ /ti'~C~ 2lNCr
Phone number r~~ _ ~L~ r
Date t ~4 ~~ ~
Drainage area number
AIL; d~SfGN~1NF0~Rf~ATION: - --
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, 10-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge?
To a 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
Slope (from level lip to to top of bank)
Are any draws present?
Leve! 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, 24-hr storm?
Length based on the BMP discharge rate?
Design flow
is a bypass device provided?
Length of the level lip
Are level spreaders in series?
~ ~
cfs
~~Qz ft2
SSL d ftz
c i iv
.B~~S
/. o S cfs
jp min
~~ _in/hr
TSB cfs

/V (Y or N)
n/ (Y or N)
~_ (Y or N)
~~
ft
ft
~y ft
B
/~ f (Y or N)
Qp sq ft
/~ ft/cfs
J\/ (Y or N)
~_ (Y or N)
r~/ (Y or N)
,~~ cfs
(Y or N)
/ov ft
,(/ (Y or N)
~~
Form SW401-bevel Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2

111. ~E:4UlRED ITENi:SCHECKLlST ~ _ -_
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.
i n ~ 1~P~ I t~P~Z 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,
- Recorded drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
~",,9~ ~~lf ~~' L 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,
- Recorded drainage easement, and
-Design at ultimate build-out.
~.-~-dt 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
- Downslope filter fabric.
Ov ~1 ~_ 4. Adate-stamped photograph of the filter strip that clearly shows the type of vegetation that is present
Jam` L' t't ~=-c-f~i 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
--~-
o g~
~' ~^~~~'' ~ c > >^15. An assurance that the installed system will meet design specifications upon initial operation once the
G°'u'n'~~f ~6`s project is complete and the entire drainage area is stabilized.
~~" ~%~'~~~~ 6. A construction sequence that shows how the level spreader will be protected from sediment until the entire
drainage area is stabilized.
Cis
b~ ~ "t- z 7. The supporting calculations.
i~- 9. A copy of the deed restriction.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1

ENGINEERING ~~~~~~~~.~~~ ~~~~~. PaGE i' of =-~
CLIENT SUBJECT S~'~ ~C-~ ~~ ~`°. ;," Y
} ~- ~ _ .~ R, epared By f `'Date 311 -, `~
PROJECT No. ~~~~ ', y~f ~ rte: r>~-~.~~ ~,,.3 ,
C..~ Reviewed By Date

-y `.
S T/f ct ±=~ _' ~ t_
~ U .> ~ ~-~'~' _ /
S ? ~.~'.. _ ~ l C~ `~ x
(/L~ /~ / ~~~~.~ v~+ L. ~; ~ ',
i c~ , t,~ IC;~ S _-
\'

~~ ~ ~ ~ a
~~~ ~(~~"J(' 1 u' _,' f ~ L1 ~ !'.ems .._ ~'`~s`~c~W~' / i ~ ~ ~ w/ ~~
/" ~ = e„© ,-.'~
.J
S ~ .~ ;~
~

;
.v r ,~,
~,
;'.a
i
Q ~ ~ J
r
~ ~,

~"' fJ.. - ~.1 ~
~~ to ~ . ~ ~'~ ~- j' ~. w
L ' t ~ ° ~
C J
! ~ J

Q C ~ t
~ ~ ~ ~ A~ ,r'B~
~ ~ ~ \.` v4
If
.+! f ~^

CJ i/~1
'~ ..qq
+
` '
M

'~~w 7 ~J> \
~ ~~
~~ Q
o
i f
~~
-~
~~

A
F%u~'~" Div r. .~ 3
~ n
(_. a,'9'' ~ ~ 2"' t-
_
if , i ~ ~~r~.,. JF , %~.vu - _

..-...- ~ ~,/l; ~ '~'?~^
~
~ Y
~ ``,L~ i _ .;i ~7's' ~ ~r%~ ='~ ~
_ .ter - , d ~% _-
~.,n ~_ -~y~ ~ - v 7 5
L J =
~
. ~r

ENGINEERING
~~~.~v~~.;~~~~~ ~~~~~ PAGE -° OF <_.
r.
CLIENT SUBJECT 5~,~ r~~^`-~~_: ~_:~:_<--~---,:,•l~ Prepared By ~ ~ Date -
PROJECT No. _ '' ~ - - " i=---==~ ~~, Reviewed By Date

`-! /-~' ~~ ~ ~~~ ! ~ .~q w~--'{"- ~ 'CVO
/ ~ / ~
~ ;;;.-
~:
t i / v ~ ~ ,/ ¢-'
~>~ ~ ~~.
~~
~_ - . . ~ r s
!I,?.r ! ~e ~ c w ~ ..
t"' .--~ ~. .,~
.,~, 'a N. e ,a:.y
y _,.
ti
_..,A
~~

~: ~,,
;,,, / s c;

T 9
-^ _ ...
;~ ~f
' ~/
f ..

!~ /

y I~

L

°4
//

~~
. ~ ~~ ~ ~
1~ T
r
,~

~%o,L.~ ~ ~ S~ ~» :,~-c!-C ,.}-,~,~;
~- ~-~ ~/~~~-%- v`~ r~ d eJ~ ~ .,c.; ~C adz`'` ,~ _
~,f..~- ~ ~ `~--~

~ ~ s` i? ;J .? 3 _ sxr .'~ ~ ~ j ~-."` ; t e ~ l'] r: J 1 'r ~.1°t ~ s. i~~?tiv, -~ ~~~'~ ~4~'-~ Lt -..;~ .. a- .. - ;. ~ ~

9+l ~ ---

LEVEL SPREADER CONSTRUCTION SEQUENCE
PRIOR TO CONSTRUCTION OF THE LEVEL SPREADER,
CONTRACTOR TO VERIFY THAT GROUND CONTOURS ARE
PARALLEL TO THE LEVEL SPREADER LOCATION AS SHOWN ON
THE PLANS, SLOPES ARE LESS THAN 6 TO 8 PERCENT, AND THAT
NO DRAWS ARE LOCATED IN THE FILTER STRIP ADJACENT TO THE
LEVEL SPREADER. ALSO, CONTRACTOR SHALL VERIFY THAT THE
LEVEL SPREADER IS 50 FEET AWAY FROM THE STREAM IF IT IS
BEING INSTALLED IN AN AREA COVERED BY A RIPARIAN AREA
PROTECTION RULE.
2. PRIOR TO INSTALLATION OF THE LEVEL SPREADER, THE
VEGETATION OF THE FILTER STRIP SHALL BE ASSESSED BY THE
CONTRACTOR AS DENSELY VEGETATED OTHERWISE ADDITIONAL
PLANTINGS WILL NEED TO BE ADDED PRIOR TO THE
INSTALLLATION. IF GRASS COVER NEEDS TO BE RE-ESTABLISHED
IN THE FILTER STRIP, CONSTRUCTION MAY BE LIMITED TO THE
GROWING SEASON.
3. CONTRACTOR IS TO MAKE BEST EFFORTS TO ENSURE THAT THE
LEVEL SPREADER IS ACTUALLY LEVEL TO ENSURE A UNIFORM
DISTRIBUTION OF FLOW. THE LEVEL SPREADER SHALL BE
CONSTRUCTED ON MATERIAL COMPACTED TO 95% OF STANDARD
PROCTOR TEST LEVELS PRIOR TO SEEDING FOR THAT AREA NOT
CONSIDERED THE SEEDBED.
4. CONTRACTOR TO ENSURE THAT THE LEVEL SPREADER AND
FILTER STRIP ARE PROTECTED FROM SEDIMENT AND
STORMWATER FLOWS DURING CONSTRUCTION. A TEMPORARY
STORMWATER DIVERSION SHALL BE NECESSARY UNTIL THE
LEVEL SPREADER HAS FULLY STABILIZED.

M
INSPECTION AND MAINTENANCE AGREEMENT
Project:
STORMWATER CONTROL STRUCTURE
LEVEL SPREADER/FILTER STRIP AREA
Raleigh, N.C.
Owners:
Address:
Phone Number:
Prepared by:
Project:
Date Constructed:
Date:
Location: Written description of device location site; reduced site plan showing location
of device; longitude and latitude of device and lot number on the recorded subdivision
plat. Reduced detail of device showing all pertinent information including but not limited
to dimensions and associated elevations.
Receiving Water Course:
Contractor: (List below)
Landscape Contractor
Grading Contractor
OPERATIONS AND MAINTENANCE AGREEMENT
[PROJECT NAME] STORMWATER LEVEL SPREADER/FILTER STRIP AREA
This agreement establishes procedures for maintenance and operation of the [project
name] level spreader/filter strip area (s) in accordance with the City of Raleigh
guidelines.
MAINTENANCE OF LEVEL SPREADERS
Vegetation-The drainage areas have a ground cover of warm season grasses or
fescue, which if properly maintained will prevent erosion of .the embankment and

provide an easy surface for inspection. The grass will be most difficult to obtain in the
area subject to water level fluctuation. Grass should be fertilized every October and
April.
Re-Seeding-Periodic re-seeding may be required to establish grass on areas where
seed did not take or have been destroyed. Before seeding, fertilizer (12-12-12) should
be applied at a minimum rate of 12 to 15 pounds per 1,000 SF. The seed should be
evenly sown at a rate of three pounds per 1,000 SF. The seed should be covered with
soil to the depth of approximately '/4". Immediately following the planting, the area
should be mulched with straw.
Trees and Shrubs-Trees, shrubs and other landscape vegetation should be permitted
only as shown on the approved planting plan. The vegetation should be kept healthy
and vibrant. If a tree or shrub dies it should be removed and replaced with another tree
or shrub from the same species (see attached maintenance schedule).
Mowing-Grass mowing, brush cutting and removal of weed vegetation will be
necessary for the proper maintenance of the areas. All area slopes and vegetation
should be mowed when the grass exceeds 8" in height to a minimum height of three (3")
inches. Acceptable methods include the use of weed whips or power brush cutters and
mowers.
Erosion-Erosion occurs when the water concentrates causing failure of the vegetation
or when vegetation dies and sets up the environment for rill erosion and eventually
gullies from the stormwater runoff. The areas should be inspected. Proper care of
vegetative areas that develop erosion is required to prevent more serious damage to
the site. Rills and gullies should be filled with suitable soil compacted and then seeded.
Methods described earlier on vegetation should be used to properly establish the grass
surface. Where eroded areas are detected, the cause of the erosion should be
addressed to prevent a continued maintenance problem. Frequently, problems result
from the concentration of runoff to one point of the bio-retention area instead of a
uniform distribution of runoff. This can be corrected by reshaping, to more evenly
distribute the runoff to areas not experiencing erosion problems.
Rodent Control-Generally in this urban environment, rodents are not a problem.
Rodents such as groundhogs, muskrats and moles are attracted to moist, wet areas
and can be quite dangerous to structural integrity and proper performance of the
earthwork and drainage. Groundhogs and muskrats thrive on burrowing into the
manmade earthwork, which become pathways for seepage. In the event that burrows
are detected within the level spreader/filter strip area, the rodents should be dealt with
by removal.
Trash and Debris--Trash acts as a barrier to stormwater infiltration and attracts
unwanted pests. The level spreader/filter strip area should be kept clear of debris such
as loose bottles, cans, food containers and other forms of rubbish. The area should be
cleared of debris as needed, but no less than twice a year.
Sedimentation & Dredging-

Filter strips that receive excessive sediment may require periodic regrading and
reseeding of their upslope edge because deposited sediment can kill grass and
change the elevation of the edge such that the stormwater no longer flows through
the strip in thin sheets. The frequency of this sediment removal can be reduced by
ensuring that the areas around the level spreader are stabilized with a vegetative
ground cover. This would include a periodic application of fertilizer and/or other
treatments necessary to promote a stable ground cover. The sediment must be
removed and the original filter strip restored
The sediment should be hauled offsite to a suitable landfill site or mounded on site
with slopes no greater than 3:1 and stabilized with approved ground cover. This
sediment site must be away from streams and/or any permanently protected open
space areas.
OPERATION
After filter strip is established, it will be inspected quarterly and within 24 hours after
every storm event greater than 1.0 inch. Record Keeping--Operation of level
spreader/filter strip area should include recording of the following:
Annual Inspection Reports--A collection of written inspection reports should be
kept on record in Section IV of this manual. Inspection should be conducted
annually. Copies should be provided to the City of Raleigh stormwater
Management Section of the Engineering Department.
Observations--All observations should be recorded. Where periodic inspections
are performed following significant rainfall, these inspections should be logged
into the Periodic Inspection, Operations and Maintenance Form in Section IV of
this manual.
Maintenance--Written records of maintenance and/or repairs should be recorded
on the Periodic Inspection, Operation and Maintenance Form in Section IV of this
manual.
Other Operational Procedures--The owner should maintain a complete and up-to-date
set of plans (as-built drawings) and all changes made to the level spreader./filter strip
area over time should be recorded on the as-builts.
Example Maintenance Schedule for Level Spreader/Filter Strip Areas
Description Method Frequency Time of year
FILTER STRIP
Reseed to maintain a dense Mechanical Yearly All year
Growth of ve etation or B hand
Stabilize groundcover in the By hand As needed As needed
drainage area to reduce the
sediment load to the
ve etation.

• ~ .
Mow grass filter strips and Mechanical 2-3 times a All year
the clippings harvested to year
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. Forested
filter strips do not require
this kind of maintenance.
Soil to be aerated Mechanical Once a year As needed
Soil pH will be tested and Mechanical Once a year Lime added as
lime will be added if needed as a result of
necessary pH test all year
Check for trash/debris and By hand As needed As needed
remove
Areas of bare soil and/or Mechanical As needed As needed
erosive gullies have formed.
Regrade the soil if
necessary to remove the
gully, and then plant a
ground cover and water until
it is established. Provide
lime and aone-time fertilizer
application.
Sediment is building up on Mechanical As needed As needed
the filter strip. Remove the or By hand
sediment and restabilize the
soil with vegetation if
necessary. Provide lime and
a one-time fertilizer
application.
Plants are desiccated. Mechanical As needed As needed
Provide addition irrigation or By hand
and fertilizer as needed.
Plants are dead, diseased Mechanical As needed As needed
or dying. Determine the or By hand
source of the problem:
soils, hydrology, disease,
etc. Remedy the problem
and replace plants. Provide
a one-time fertilizer
application.
Nuisance vegetation is By hand As needed As needed
choking out desirable
species. Remove
vegetation by hand if

possible. If pesticide is
used, do not allow it to get
into the receivin water.
The Swale and Level Lip
The swale is clogged with Mechanical As needed All year
sediment. Remove the or By Hand
sediment and dispose of it
offsite.
The level lip is cracked, By hand As needed All year
settled, undercut, eroded or
otherwise damaged. Repair
or re lace lip.
There is erosion around the Mechanical As needed All year
end of the level spreader or By hand
that shows stormwater has
bypassed it. Regrade the
soil to create a berm that is
higher than the level lip, and
then plant a ground cover
and water until it is
established. Provide lime
and aone-time fertilizer.
Trees or shrubs have begun Mechanical As needed As needed
to grow on the swale or just or By hand
downslope of the level lip.
Remove trees or shrubs.

QF' WATFR Michael F. Easley, Governor
~
Q
~ G
.,
~ ~- William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
~ ~
0 -C Coleen H. Sullins, Director
''' Division of Water Quality
January 11, 2008
DWQ Project # 07-0666, Ver. 2
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Broughton Properties
P.O. Box 464
Raleigh, NC 272602
Subject Property: Oak Forest Road Extension
Ut to Perry Creek [030402, 27-25-(2), C, NSW]
RE: ADDITIONAL INFORMATION
Dear Sir or Madam:
On January 10, 2008, the Division of Water Quality (DWQ) received your additional
information for the above referenced project. However, on November 20, 2007 the DWQ
returned your application as incomplete. Once you have redesigned your project to address the
problems and inadequacies, you will need to reapply for DWQ approval. This includes
submitting a complete application package, including five (5) application sets, and the
appropriate fee. We have herein returned your additional information.
Please be aware that you have no authorization under Section 401 of the Clear Water Act for this
activity and any work done within waters of the state would be a violation of North Carolina
General Statutes and Administrative Code. Please call Ms. Cyndi Karoly or Mr. Ian McMillan at
919-733-1786 if you have any questions or concerns.
Sincerely,
i
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
cc: Lauren Witherspoon, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
CH Engineering/Maha Chambliss, P.O. Box 30128, Raleigh, NC 27622
Filename: 070666V er20akForestRoadExt(Wake)Returned_Application2
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: http_'~h2c%enr_state_nc_us~nc~~etlands.
N ne Carolina
~tura!!~
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper