20070933 Ver 2_Meeting Request Review_20200930

ID#* 20070933 Version* 2
Regional Office * Raleigh Regional Office - [phone]
Reviewer List* Stephanie Goss
Pre -Filing Meeting Request submitted 9/30/2020
.............. -........_ I ...................-.................................._......_......_.....................................................................
Contact Name * Kim Hamlin
Contact Email Address*
Project Name*
Project Owner*
Project County*
Owner Address:
[e-mail]
Cadenza Lane Culvert
Rose Hall HOA
Wake
Street Address
11320 Moonsprite Way
Address Line 2
oty
Raleigh
Fbstal / Zip Code
27114
Is this a transportation project?* r Yes r No
Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - r 401 Water Quality Certification -
Regular Express
❑ Individual Permit F Modification
❑ Shoreline Stabilization
Does this project have an existing project ID#?*
r Yes r No
Please list all existing project ID's associated with this projects.*
DWQ EXP #07-0933
State / Rovince / Region
NC
Country
USA
Do you know the name of the staff member you would like to request a meeting with?
Please give a brief project description below.*

The project involves correcting/improvements to a perched corrugated
aluminum culvert at an existing neighborhood road crossing. The proposed
project includes adding a concrete baffle and larger rip rap to create a 12-
inch bury of the culvert, improving slopes at the culvert inlet and outlet, and
improving the riprap dissipator pad at the culvert outlet.
Please give a couple of dates you are available for a meeting.
10/ 14/2020
10/ 15/2020
Please attach the documentation you would like to have the meeting about.
Culvert Documents 5-20.pdf 862.27KB
Letter - NCDOT 84-inch culvert 7-21-20.pdf 83.42KB
pdf only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
• This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
• I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
• I also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
mtq #ft
Submittal Date 9/30/2020
Reviewer Meeting Request Decision
Has a meeting been scheduled?* 4 Yes 0 NO

JUL 03,2007 04:58P B. Scott Mitchel. 5770875 page 2
,Michael F. P wlty. Uuvnmor
Vv'iilrmt 5 FMif., Secrelctry
Noah Carolina Depatirttmt Of EnVjfGrM-.fl: tu,d Natural RtfLurcos
& 6;. i- i; a
June'25, 2007
Honeycutt ESrates, C,I,C
Attn, Mr, Rusty Ammons
318 West Millbrook Road
Raleigh, NIC 27609
Subject Property: Rose Hall Subdivision, Phase 2
Cedar Creek [030401, 27-18-(1), WS-IV, NSW]
Cnleq.l H Sullins, Director
PlYwon of Warcr Quality
DWQ EXP No. 07-0933
Wake County
APPROVAL OF 401 WATER QUALITY CERTIFICATION .e.NA AUTHORIZATION CERTIFICATE PER THE
NEUSE RIVER BUFFER PROTECTION RuLES (15A IVCAC 2B ,Q233) WITH ADDITIONAL CONDITIONS -
E1ipjwsS' REYlEW PRot,j?AM
Dear Mr, Ammons:
Y.,,,u ha-e ow approval, in =ccrdance wiTh the attached conditions and those fisted below., to place fill
within o- otherwise impact 7,299 syjul a feet f ft) of Zone 1 of the protected riparian buffers, 3,248 square
feet W) of Zone 2 of the protect;d riparian buffers, and [48 linear leer of stream for the purpose of
constructing the residential subdivision. as described within your Pre-wristruction Noti£;�tion
Appllet cla dated May 24, 2007 and additional intormation received on June 6, 2007 and June 21., 2007,
The impacts are covered by General Water (duality Certification Namber(s) 3627 (GC3627'i. The
Certifications) allow ytlL. to use Natiom,,ide 1'errnit(s) - W I4 when issbed by the US Amly Corps of
Engineers (USAC:E), In additiori, you should obtain or otherwise comply with any other regtiired federal,
state or local permits before you go ahead with your Pt-0ject including (hut not limited to) Erosion and
Sediment Control, and Non-dis;harge regulations. Also, this approval to proceed with your proposed
isnpaets or to conduct impacts to waters As depicted in your stpplica,tion shall expire upolr
expiration of the 404 Permit.
This approval is for the purpose and design that you described it, your application, if you change yo+ar
project, ,you must notify us and you may i� required to send us a new application. If the property is at-ld,
the new owntr must be given a copy of this Certification and approval letter and is thereby responsible for
complying with all conditions. If total f:l1s for this project now or in the ftsture) exceed one acre of
wetland or 150 linear feet of stream, compensatory mitigation may be fequired as described in 15A
NCAC-214.050b (h). This approval requires you to follow the conditions lister[ In the attached
Water Quality !Certifications (C:C 3627) and any additional conditions listed below.
401 Uversight/Expre.-4 Rtvicw Pcrmtrting Unit
i bSCf Mail 9er, Mc Coll-r, RtlleiBY. North Carolina 27699.1(iso
2321 Crabtr:e aaulevar3, suite 250Raleigh, Norh Cuohns 1?5,)t
Phone• 919.733•178b1' FAX [phone] ! Int.-tzter ixro rfh2e.enr;larr rtr.u�+.•�wsdanl;
,'Ln i grjal GoportunilyiAffrnnativ: Action Ernpioyer— 501/0Rcycled/l D% Post Consumer !raper
- �i,� Caro inN
�'r+f�rx�l�ly

,NL 03, 2007 04 :59P B. Scott Mitct+.ei 5770875
page 3
Honeycutt Estates, L.t,C
Page 2 of 4
June 25, 2007
The Additional rnnditionr of the Certiftentina are::
1. Impacts Approved
The following, impacts cue hereby approved as long as ail of the other specific. and general
conditions of this Certification are met, No other Impacts are approved including incidental
impacts.,
I>•P : Amount 'Urlrs! I Reference
Stream erennia! 14$ Iihear feet PCN rage $ of 12
Buffers 40ne 1 7,229 (SF) I PO ,a a 11 of 12
buffers zona 2 3,248 (SF) 11 of 12
2. No Was-e, Spoil, Solids, or fill of Anv Kind
No waste, spoil, solids, or till of any kind shall %cur in wetlands, waters, or riparian areas beyond
the footprint of the impacts depicted in 'the Pre-ConstrLiction Notification. All ;,anstnJctipn
activities, including the design, installation, operation, and maintenance of sediment and erosion
control Best Management Practices, shall be perforniud so that no violation; of state water quality
standards, statutes, or rules occur,
Erosion and sediment runtrul practices must be in full compliance with all specifications hove -ruing
the proper design, installation and operation and maintenance of such Host Management Practices in
order to protect surface waters standards:
a, The erosion and sediment control measures for the project must be designed, installed,
operated, and maintained in accordance with the most. recent version of the North Carolina
Sedlnrenl and lrosion Control Planning and Design Manual.
b, The design, installation, operation, and maintcnavec oFthe sediment and crosioncontrol
measures must be such that they equal, or exceed, the requirements specified in the most
riXont version of the North Carolina Sediment mid Erosion Control Manua?. The devices
shall be maintained on all construction sites, borrow sites, and waste pile (spoil) projects,
Including contractor -owned or leased borrow pits associated with the project,
Sufficient materials required far stabilization and/or repair of erosion control measures and
stor mwater routing and treatment shall be on site at all times,
4. Sedirncnt and Erosion Control Measures
Sedimsut and erosion control meayuros shall not be placed in wetlands or waters to the maximum
extent practicable. If placement of sediment and erosion control devices in wetlands and waters is
unavoidable, they shall be removed and the natural grade restored within two (2) months of the date
that the Division of Land Resources has released the project.
5. Protective Fencing
The outside buffer, wetland or water boundary and along the construction corridor within these
boundaries approved under this autltoriwinn shall be ,:learn marked with omngr warning fencing
(ur similar high visibility nurterial) for the areas altar have bem approved to infringe within the
buffer, wetland or ► ater prior to any land disturbing activities to ensure ccmpliarico with 15A
NCAC .2B .0233 and GC: 3627,
6, Diffuse Flow Measures Approved
The diffuse flow measures (level spreader designs submitted or, May 31, 2001 and revisions
submitted oil .tune 21, 2007) must be implemented and the stoirnwater management facilities
shall be constructed Find operational before any permanent building is occupied ar the subject site.

'UL 03,2007 04:59P E. Scott Mitchel 5770875 page 4
Page 3 of 4
June 25, 2007
The snttctural storin water practices as approved by this Office as well as drainage pets=s must
bs nnninmined in pGtpctuity. No cliaitbes to the structural stormwater practl;.es shall be rna&
without written authorization from the Division of Watcr Quality,
Deed Notifications
Deed noti.ftcationg or similar mechanisms shall be placed on all retained jurisdictional wetlands,
waters and riparian buffers in order to assure compliance for future wetland, water and riparian
buffer impact, These mechanisms shall be put in place prior to impacting ;any wetlands,
waters and/or buffers approved for impact under this Certification Approval and
Authorization Certificate.
These documents shall be filed with the Register of Deeds, Wake County, North Carolina.
Honeycutt .Estates, LLC shall suhtnit copies of these documents to the Division of Water Quality
before any impacts to protected riparian buffers, wetlands, or waters shall ocour.
S.ConsiructionStormwawrPermit NCG010000
Upon the approval of an Erosion and Sedimentation Control Plan issued by the Division of Land
Resources (DLR) or a. DT R delegated local erosion and sedimentation control program, an
NPDES Cyencrai stormwater permit (NCG010000) administered by DWQ is automatically issued
to the projw- This General Percent atllows stormwster to be discharged during land disturbing
c msUv,.tion activities as stipulated by oondidom in the permit. 1f your project is covered by this
permit japplicable to construction projects that disturb one (1) or more acres;, full compliance
with permit c n&ions including the sedimentanor control plan, self monitoring, record keeping
and reporting requirements are required. A copy of his permit and monitoring report forms may
be found at _enr,stcrta.►rr.atsls;r_uFur &cuments htrr.,,
9. C".ertificate of Completion
Upon completion Of all work approved within the 401 Water Quality Cerrif Cation or appli::able
Buffer Mules, wrtd any sabsequerit modifications, the applicant is required to return the attached
certificate: of completion to the 401 Oversight/Express Review P9rtnitting Unit, North Carol na
Division of Water Quality, 1650 Mail Service Center, Raleigh, NC:, 27699.1650.
1 D. ZSotifictition of Construction
The applicant and/or authorized agent shall contact the DWQ Express Review Progam in writing
at the letterhead address within ten (10) days of the commenoeMent of construction.
Violations of any condition herein set forth may result in revocation of this Certification and may result in
criminal and/or civil penalties. Ae authorization to proceed with your proposed impacts or to conduct
impacts to welters as depicted in your application and as authorized by this Certification, shall expire upon
expiration of the 404 or CAMA Permit.
if you do not accept any of the conditions of this Certification (associated with the approved wetland or
stream impacts), you may ask for an adjudicatoiy hearing. You must act within 60 days of the date that
you receive this letter. To ask for a hearing, send a written petition, which conforms to Chapter 150B of
the North Carolina Gereral Statutes to the Office of Administrative Hearings, 6714 Mail Service Center,
Raleigh, N,C, 27699-6714. This certification and its conditions are final and binding unless you ask. for a
hearing,
Any disputes over detenninations regarding this Authorization Certificate (associated with the approved
buffer impacts) shall be referred in writing to the Director fur a decision, The Dim tor's decision is
subject to review as provided in Articles 3 and 4 of G.S. 150$.

JUL 03,2007 05:OOP B. Scott Mitchel 5770875 page 5
Honeycutt F—lutes, L' LC
Page 4 of 4
June 25, 2007
This letter completes the review of the Division of water (duality under Section 401 of the Clean Water
Act and the Neuse: riparian buffer protection Yule as described within I5A NCAC 2B .0233, If you have
any questions, please telephone Lia Myatt or Cynthia Van Der Wiele at 919-733-1786.
Sincerely,
Coleen H. Sullins, Director
NC Division of Water Quality
C]431, vdwllcm
Enclosures: rC 362'
Certificate of Completion
CC USACE Raleigh Regulatory Field Office
Mike Noran, DWQ Raleigh Regional Coffee
DLR Raleigh Regional Office.
Filc Copy
Central Files
Scott Mitchell, Mitchell Environmental, P.A., P.C. Box 341, Fuguay-Varina, l`'C 27526

STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
COUNTY
SUBJECT:
Alan R. Keith, P.E.
Diehl & Phillips, P.A.
219 East Chatham Street
Cary, North Carolina 27511
Dear Mr. Keith:
September 17, 2007
Wake
Construction Plan Review — Rose Hall Subdivision — Phase 2
LYNDO TIPPETT
SECRETARY
This office has completed its review and hereby approves the subject plans received at this office July 23, 2007
for compliance with current Department of Transportation minimum subdivision construction standards.
It is the responsibility of the owner/developer to provide verification certifying that the completed subgrade and
base course meet NCDOT requirements. This certification shall be conducted by a professional engineer and
shall include the following: proofrol ling of subgrade and base course. (Reference attached construction
guidelines)
The paving of this roadway shall be in accordance with the revised NCDOT 2006 Standard Specifications,
Sections 610, 1012 and 1020. The Contractor shall follow all procedures of the attached Quality Management
System (QMS) for asphalt pavement - Maintenance Version. The Contractor must adhere to all testing
requirements and quality control requirements specified. The Contractor shall contact the NCDOT Division 5
QA Supervisor at (919)-562-0018 prior to producing plant mix and make the Supervisor aware that the mix is
being produced for a future NCDOT road. Only NCDOT approved mix designs will be acceptable. A quality
control plan shall be submitted to the District Engineers' Office prior to asphalt production. Use form QMS-
MVl for the Quality Control Plan submittal. Failing mixes and/or densities are subject to penalties including
monetary payments or removal and replacement.
The North Carolina Department of Transportation does not add roads to its system unless they meet the
requirements of the current (January 1, 2000) NCDOT Subdivision Roads Manual. Please be aware that only
North Carolina Department of Transportation approved structures are to be constructed on public right of ways.
The Department will not be held responsible for damages to sprinkler systems placed within the right of way and
reserves the right to remove any system that adversely affects safety or maintenance of the roadway. The
Department will not be responsible for the perpetual maintenance of BMPs. Since these requirements are the
responsibility of the owner/developer, we ask that you provide them with a copy of this letter. Feel free to
contact Mr. Byron Sanders, Jr., Assistant District Engineer, at 919-733-7759 if you have questions or need
additional assistance.
Sin1�
R
T. R. Elmore
District Engineer
THE/BS
Cc: Jan Womble, w/plans
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION FAX: [phone] DISTRICT DRIVE
DOH DISTRICTI WEBSITE: WWW.DOH.DOT.STATE.NC.US RALEIGH NC 27607
1575 MAIL SERVICE CENTER
RALEIGH NC 27699-1575

Subdivision Construction Guidelines
The construction, including all materials used within, Rose Hall Subdivision — Phase 2 roadways shall be in accordance
with NCDOT's 2006 Standard Specifications far Roads and Structures and NCDOT's 2006 Roadway Standard
Drawings. These manuals may be obtained from the Design Services Branch at the Century Center Complex Building
B off of Poole Road. Contact Kim Canady at 250-4124 or go online tow.uw.dolt.dot.state.ne.usfguidelinm.
Production and inspection of asphalt plant and roadway operations shall be in accordance with the latest Quality
Management System (QMS) for asphalt pavements - Maintenance Version. The Department's Division Quality
Assurance Lab Supervisor, .Ian Womble (919-562-0018), shall be advised prior to asphalt production and form QMS-
MV I shall be submitted to the District Engineers' Office prior to asphalt production.
The latest specifications can be downloaded at
►vwrv.doh dot state nc u5J(Ipetationa/dQ chief eng/eon�gxuc:tionvnit/paveconst/c nisintn htm.
All Roadway Technicians supervising asphalt work shall be certified by NCDOT. Guidelines can be viewed at
httptll�vww,dob.dot-s%te.ne;.us/Memtionsldp chief englconstructionunit/,.,paveeo!lWdefaultl htm.
The Engineer shall be responsible for all construction inspection, field materials sampling and testing, and
communication and coordination with NCDOT's District Engineer.
The Engineer shall be familiar with NCDOT's standard procedures and practices as set forth in the Department's
Construction Manual, Standards and Specifications, Roadway Standard Drawings, and Materials and Tests- Manual.
The Engineer shall work under the general guidance and direction of NCDOT's District Engineer.
The Engineer shall keep detailed and accurate records of the Contractor's daily operations.
The Engineer shall maintain records of all sampling and testing accomplished.
The Engineer shall verity that all work is being performed in accordance with the Department's Specifications and
guidelines.
The Engineer shall provide verification signed and sealed certifying that construction meets NCDOT's requirements.
Certifications shall include, but not be limited to the following:
Embankment Compactions: Every 5000 cubic yards or fraction placed
Subgrade Density: Every 1000 linear feet per travel lane (In Subdivisions proofroll all lanes will
also be required)
ABC Sampling shall be performed according to NCDOT guidelines for projects exceeding
2500 tons.
Stone Base Density: Every 1000 linear feet per 28 foot width (In Subdivisions proofroll all lanes
will also be required)
Stone Base Thickness
Asphalt Density: In Accordance with QMS Specifications,
Nuclear density results are not accepted with out control strip results.
Asphalt Thickness must be verified by taking cores
Asphalt Certifications shall be submitted via form QMS-MV2
All drainage pipes, precast concrete, cast iron fittings, and guardrail must be pre -approved by NCDOT's material and
test section prior to shipping to construction site. An engineer or certified technician shall verify that all pipe used was
properly marked by NCDOT when the material arrived on construction site.
All structural stormwater BMP's and associated access/maintenance easements shall be depicted on a final subdivision
plat which is recorded with the county Register of Deeds. The operation and maintenance agreements shall be
referenced on the final plat and shall be recorded with the county Register of Deeds upon final plat approval.
All structural stormwater BM P's shall be located outside of the NCDOT Right -of -Way. A permanent public drainage
easement shall be established outside of the NCDOT Right -of -Way by the designer for access to the BMP's. The
NCDOT assumes no responsibility for the operation, maintenance or liability of the structural stormwater BMP's.
All drainage pipes, precast concrete, cast iron fittings, and guardrail must be pre -approved by NCDOT's material and
test section prior to shipping to construction site. An engineer or certified technician shall verify that all pipe used was
properly marked by NCDOT when the material arrived on construction site.
The developer shall be responsible for the installation of all required signage in accordance with NCDOT Standards
Any plan changes shall first be approved by the District Engineer.

.4
DUI'.ING THE COURSE OF THE REVIEW IT WAS NOTED THAT THE SITE
MAY HAVE IMPACTED A RIVER BASIN BUFFER ZONE AND / OR MAY
RE.OUIRE THE APPLICATION AND ISSUANCE OF PERMITS FOR
STORuIWATER MANAGEMENT SYSTEMS. IT IS THE RESPONSIBILITY OF
THE DEVELOPER/APPLICANT TO CONFORM TO THE REGULATIONS OF
GOVERI�IENTAL AGENCIES WITH REGARD TO MINUMIZING WATER
QUALITY IMPACTS Ni ADDITION TO THE DRAINAGE REQUIREMENTS OF
THE DIVISION OF HIGHWAYS. THIS REVIEW DOES NOT RiPLY
CON-FORivIITY TO LOCAL OR OTHER STATE GOVERNt t T REGULATIONS
NOR CONSTITUTE AN APPROVAL OF SUCH.
All open end cross pipes, in non CAMA counties, will be buried 20% of their diameter 1
to a maximum of one foot as the bed conditions allow.
ALL ROADiIAY DITCHES MUST BE STABLE BEFORE' ACCEPTANCE
UPON THE ST2.TE SYSTEM FOR NLAINTENANCE.
,lNp f4 Se. u
101.04 HE.ADWALLS ARE USED ON PIPES � 36.' IN DIAh1ETERUSUALLY
;�
ON BOTH ENDS BUT ALWAYS ON THE INLET. FLARED END SECTIONS
ARE USED ON SWkLLER PIPE.
STORMWATER BMP'S AND ASSOCIATED
ALL STRUCTURAL L BE DEPICTED ON A FINAL.
ACCESS�NT�ANCE EASEMENTS) SHAL REGISTER OF
SUBDIVISION PLAT WHICH IS RECORDS AN E AGREEMEITH THE NT SQL BE
DEEDS. THE OPERA � MAINT PLAT ANDSHALLBE RECORDED WITH THE
REFERENCED ON T
COUNTY "GISTER OF DEEDS UPON FINAL PLAT APPROVAL'
ALL STRUCTURAL STORMWATER BMP'LOCATED
D
OUTSIDE OF THE NCDOT RIGHT _O.QQ_ iAY. A PERMANENT
E EASEMENT' SHALL BE ESTABLISHED OUTSIDE OF THE NCDOT
DRAINAGE RIGHT-OF-WAY BY THE DESIGNER FOR ACCESS TO
NCDOT ASSL]MES NO RESPONSIBILITY Og�IWA'I`ER BiV
LIABILITY OF THE STRUCTURA

STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
October 9, 2008
COUNTY: Wake
SUBJECT: Rose Hall Subdivision — Phase 2
Alan R. Keith, PE
Diehl & Phillips, PA
219 East Chatham St.
Cary, North Carolina 27511
Dear Mr. Keith:
LYNDO TIPPETT
SECRETARY
This is to advise that Cadenza Lane in Rose Hall Subdivision — Phase 2 as shown on the
construction plans received on July 23, 2007 and approved on September 17, 2007 have
been constructed to meet the minimum construction standards of the Division of
Highways. These streets may be added to the State Maintained System when a sufficient
number of homes are constructed thereon and the roadway is found to be in an acceptable
state of maintenance when petitioned for addition.
Sincerely,
T. R. Elmore
District Engineer
THE/BS
cc: Lynn Patrie, Wake County
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION FAX: [phone] DISTRICT DRIVE
DOH DISTRICTI RALEIGH NC 27607
1575 MAIL SERVICE CENTER WEBSITE. WWW.DOH.DOT.STATE.NC.US
RALEIGH NC 27699-1575

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INLET CONTROL : CORRUGATED METAL PIPE @ HEADWALL
FLOW RATE,CFS 202.00
PIPE DIA., INCHES 72.00
HEADWATER DEPTH, FT. : 6.00
HW/D 1.00
Cadenza Lane 72-inch Q-100

OUTLET CONTROL
PROFILE TYPE = M2 (DRAWDOWN)
ENTRANCE LOSS COEFFICIENT 0.50
FLOW RATE, CFS 202.00
PIPE DIAMETER, INCHES 72.00
MANNING'S 'N' 0.0220
PIPE SLOPE, FT./FT. 0.0065
PIPE LENGTH, FT. 90.00
TAILWATER DEPTH, FT. 4.78
HEADWATER DEPTH, FEET : 6.43
HW/D
1.07
OUTLET VELOCITY, FPS 8.36
Cadenza Lane 72-inch Q-100

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DIEHL & PHILLIPS, P.A.
CONSULTING ENGINEERS
1500 Piney Plains Rd., Suite 200
Cary, North Carolina 27518
Telephone [phone] — Fax [phone]
July 21, 2020
District Engineer
NCDOT
4009 District Drive
Raleigh, NC 27607
Re: 84-inch Corrugated Aluminum Pipe, Cadenza Lane
Rose Hall Subdivision Phase 2, Wake County
Dear Madam / Messer:
WILLIAM C. DIEHL, P.E.
JOHN F. PHILLIPS, P.E.
ALAN R. KEITH, P.E.
Diehl & Phillips, P.A. designed the subdivision streets for Rose Hall Subdivision Phase 2 in
2007. Cadenza Lane in Phase 2 included an 84-inch aluminum culvert crossing of a branch that
carried Neuse Riparian Buffers. The 84-inch culvert crossing was the subject of a flood study as
required by Wake County, and Neuse Riparian Buffer impacts (letter attached). All required
environmental permits were obtained and followed during construction to the best of our
knowledge. NCDOT reviewed and approved the plans for construction of Phase 2 streets (letter
attached). The project was constructed and a "Built to Standards" letter was issued by the
NCDOT District Office on October 9, 2008 (copy attached).
A 72-inch culvert was required hydraulically for the Cadenza Lane crossing in Phase 2. An 84-
inch culvert was approved so that the culvert could be buried 12 inches as required by the
environmental permitting. The inverts of the 84-inch culvert were designed 12 inches below the
existing channel to achieve the 12-inch burial requirement. The rip rap dissipator on the
downstream end of the culvert was set 12 above the culvert invert out with the intent of creating
a dam to promote filling the bottom of the culvert with sediment. The 84-inch culvert installation
was surveyed following construction to verify that the elevations matched the design. The
survey confirmed that the culvert was set such that the flood elevations matched the approved
flood study and environmental requirement (see attached certification). Thus, the 84-inch culvert
was constructed as designed and approved by regulatory agencies.
Our firm visited the culvert installation in June, 2020 at the request of the Rose Hall
Homeowners Association. We were given a copy of a October 16, 2015 memo from Bridge
Maintenance to your office regarding items required for correction for street maintenance
acceptance (copy attached). Enclosed with this letter are plans and details to address the items
listed in the Bridge Maintenance Memo. The following are proposed:

1. The culvert is set at the proper elevation per the certification. A concrete baffle wall and
larger rip rap are proposed to create the 12-inch bury (sedimentation) of the culvert as
originally intended. The void area under ends of the culvert would be grouted.
2. The slopes at the inlet end would be improved by installing rip rap lined channels on
either side to replace the original channels. Filter fabric would be installed under the
channels and the new rip rap at the culvert entrance.
3. The slopes on either side of the outlet end of the culvert would be improved by installing
rip rap lined channels on either side of the culvert. The dissipator for culvert would be
improved by adding Class 1 rip rap and filter fabric. The rip rap would be placed against
the baffle wall for added stability.
4. The gouges in the top of the pipe were observed. No water, seepage, or soil was evident
from any of the damaged sites. Further, it appears that the gouges were repaired during
construction by adding structural elements on the outside of the culvert to seal the
gouges. Since the structure appears to be sound, we do not propose corrective action.
We request that you review the plan and notify us if the N.C. Department of Transportation will
allow the proposed measures to satisfy the deficiencies noted. Contact our office if you require
anything further.
Sincerely,
Diehl & Phillips, P.A.
efA�4 -�4
Alan R. Keith, P.E.
enclosures
Cc: Kevin Gordan