20071522 Ver 1_More Info Received_20071003

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TIC JOHN R Mc1-DAMS COMPANY, INC.
LETTER OF TRANSMITTAL
To: Ms. Lia Mvott
NCDWO
401 Wetlands Unit
2321 Crabtree Boulevard
Raleigh, North Carolina 27604
Re: Porto Fino -Clayton, NC
DWO Response to Comments
I am canrlinn vni i tha fnllnwinn itam(cl•
COPIES DATE NO. DESCRIPTION
1 Co of Comment Ltr EXP # 07-1522
3 Res onse Cover Letter
3 Com lete PCN Addendum
3 Revised Buffer Impact Exhibits
3 Revised PCN to reflect bio-retention buffer im acts
3 Desi n Calculations Dalton En ineerin
3 Dalton detail Sheets bio-retention, drains e, culvert calcs
3 Sanderson En ineerin Res onse to Comments
3 1:50 Level S readers 13, 14, 15 detail sheets
3 Existin Conditions -Aerial Photo
3 Existin Conditions - To 0
3 Revised Overall Im act Ma
3 Bio-retention Cells 1-6 Executed O&M Agreement (1 original
and 2 co ies
These are transmitted as checked below:
® As requested
® For approval
Remarks:
Copy to:
Date: October 3, 2007
** HAND DELIVER'"
Job No.: WLT-07010
EXP # 07-1522
® For your use
Signed
Kevin Yates
Project Manager
FOR INTERNAL USE ONLY D ~ ~ ~ ~ ~ n
^ Copy Letter of Transmittal Only to Flle ~J
®Copy Entire Document to File QGT (;s~; ~~Q~
a~MW ~ VYAT//~~ (,}UALITY
CIVIL ENGINEERING • LAND PLANNING • SURVEYIN~'~A'~~~~~MM~~AT~I
PO Box 14005 Research Triangle Park, NC 27709 [phone] fax [phone]
www.john rmcadams.com

SEP-12-2007 16:39 FROM:OWQ-WETLRNOS 9197336693
.Oc\C~ Wl~T~9QG
L~ '~
September 18, 2007
EXP~SS RE'VII,W NO';CYFYCATION LETTER
Mr. lob Bailey
442 %a East Main St.
Clayton, NC 27520
project Nantc: Porto Fino Residentisrl Subdivision
Dear Mr. Bailey:
70:93612269 P:2~3
Michael F. Easley, Governor
VlritliArn G. Ross Jr .Secretary
North Cazalina Bepanrrrent of Envirenmcnt and Ptxnaal Picsourccs
C~>lecn H. $ulBn~, gircctpr
Division of water Qua[iry
D ~ ~ p~ ~ ~~ r~ mston County
I XPfiI 47-I522
~ (; T ~`~~~ `1001
DENk - WAi Ek UuALITY
YVE7't.AN~,i MdP t1T(11tM!"!R,'t'R~t l1RANCM
On September 17, 2007, the Fxpress Review Program of the Division of Water Quality (DWQ} received your
application for the above referenced project, T7ze J~WQ has determined that your application will require sdditionsl
informai}or1. Please provide the following inforrttatiort so that we may continue to review your pra,ject and
prevent denial of your application as required by 1511 NCAC 2H .0506:
1. Please provide one (1) copy of a color»leted PCN Addendum as requested in the Express Rcvicw acceptance
letter. As per the attached PCN Addendum, please provide all t}tc items that were missing from your
Septctnber 1?, 2007 submittal (pre-construetionlexistint; conditions map fox all phases of the project (please'
include culvert sizing}; drainage plsn; level. spreader worksheets; etc.}
Difl'~se Flow Provisions as required by the Neese Riparian Buffer Rule:
a. All proposed level spreaders must be designed according to the DWQ Level Spreader Design
Guidance (January 1, 2007) or tlje 2007 NC DWQ Stormwater BMP Manual.
b. Please provide details on your pre-treatment method (i,e. vegetated swalc details, supporting
cslculations, etc.).
c. Ali level spreaders must include a farebay.
d. Please provide details on your bypsss method (typical details and supporting calculations),
e. Please revise the level spreader IcngTh {or redesign utilizing a more appropriate B1rIP) that you have
proposed for level spreaders 3, 5-1 I, as they are too short.
f, Most areas where level spreaders have been proposed appear to have a higher slope
g. Please provide 1:54,004 scale drawing of level spreaders 13, 14, and I S.
h. Please include cotystnrction notes/instnrctious far• installation of the level spreaders.
3. 11.pproved Stormwater Management Plans:
a. Please provide one (1) copy of the approved (by Johnston County) Stormwater Management Plans for
t1~e entire project.
b. Please provide a written response t'o )DWQ regarding how the stipulations in the Johnston County
Stormwater Management Approval have been addressed.
4. Stub Roads:.
a. DWQ has concerns regarding cumulative impacts. Please explain the. two stubbed out roads located
on the eastern property boutrdary. The proposed thoroughfare road seems to have riparian but'fcr and
stream impacts that are not sh. own oa this application.
4010yer'S~M(Exprovs Review Pemrittmg Una
1650 Malt SorolC'a Center, Ralegri, North Carol"rna 27039-1650
2321 Ccabheo eaubvard, 5ufte 250, Raleigh, North CaroBrta 27604
Phone: 919-733•t78fi 1 FAX [phone] /Internet:. httn:/fh2o.enr_sraro.ne.us/ny~£tt~flfi3
Nt3 [hCarolina
~ll~lll'Qa'~!f
an [;peal Opporruntty/A1Flrrnatlve Action Employer - 50%Recycled/10%Post Consumor Papar

SEP-18-2007 16:39 FROM:DWQ-WETLANDS 919?336893 70:93612269 P:3~3
Plcasc respond within eve (S} days of the date of this letter by sending three (3} copies of this information. The
T:xpzcss Rcvicw Pxogram is fl process ti~at requires all patties to participate in a tirtlely manner.
'I'.his letter only addresses the applioation xeview and does riot authorise any innpacts to wetlands, waters or protected
btaffers. P)casc contact Lia Myatt at (919} 733-9502 if you have any questions.
Sincerely
CytldllCaroly, Supervisor
4011Express Rcvicw Ovexsite Unit
CBZVIem:

cc: DWp Raleigh Regional (~fficc
DLR Raleigh Regiansl Ql'lice
USACE Raleigh Field Office
CCntrfll 1' i lCS
File copy
Kevin Yates, John R. McAdams Company, 2905 Meridian P.kwy., Durham, NC 27713

~~ THE
~.~InC~ 1979
JOHN R. McADAMS COMPANY, INC.
~x,p o~-~5Z2
October 3, 2007
- t..
Ms. Lia Myott (t (,~ ~~` zuu /
NC Division of Water Quality
401 Wetlands Unit n~.ivr~ _ w~;r=rt ~uAUn
2321 Crabtree Boulevard yli~Tl.AN@NPNq~~'~n~eTr~+gH
Raleigh, North Carolina 27604
Re: Porto Fino; Clayton, NC
DWQ Response to comments - (EXP # 07-1522)
WLT-07010
Dear Ms. Myott:
Please find below our response to your comments dated September 18, 2007
for the above referenced project.
Per our Friday, September 28'", 2007 meeting at the DWQ office, it was
confirmed that Phase 1 and Phase 2 of the Porto Fino could be constructed
independently of a 404/401 permit. Phase 1 and Phase 2 were designed and
approved by Johnston County prior to the 2007 BMP manual. Phase 3 is a
new phase of Porto Fino, which will implement Bio-retention cells in-lieu of
level spreaders due to steep slope conditions, per the new BMP manual
Comment 1: Please provide one (1) copy of a completed PCN Addendum as
requested in the Express Review acceptance letter. As per the the
attached PCN Addendum, please provide all the items that were
missing from your September 17, 2007 submittal (pre-
construction/existing conditions map for all phases of the project
(please include culvert sizing); drainage plan; level spreader
worksheets; etc.).
Research Triangle Park, NC
Post Office Box 14005
Research Triangle Park,
North Carolina 27709
2905 Meridian Parkway
Durham, North Carolina 27713
800-733-5646
919-361-5000
919-361-2269 Fax
Charlotte, NC
5311 Seventy-Seven Center Drive,
Suite 66
Charlotte, North Carolina 28217
800-733-5646
704-527-0800
704-527-2003 Fax
www.johnrmcadams.com
Response 1: - Please find enclosed (3) copies of the completed PCN
addendum.
- Please find enclosed (3) copies of an aerial photo overlaid
with existing conditions descriptors.
- Please find enclosed (3) copies of the detail sheets that
show the spine road, culvert sizing calculations, and
drainage plan to the bio-retention cells for Phase 3
provided by Dalton Engineering.
- Please find (3) copies of the revised impact map sheets 1-3
that depict the riparian buffer impacts associated with the
bio-retention cells and PCN.
Comprehensive Land Development Design Services
We help our clients succeed.

szY~~~ 199
THE JOHN R. McADAMS COMPANY, INC.
Ms. Lia Myott
October 3, 2007
Porto Fino -Clayton, NC
WLT-07010
Page 2
Diffuse Flow Provisions as required by the Neuse Riparian Buffer Rule
Comment 2a: All proposed level spreaders must be designed according to the
DWQ Level Spreader Design Guidance (January 1, 2007) or
the 2007 NC DWQ Stormwater BMP Manual.
Response 2a: As discussed in previously, due to slope constraints bio-
retention cells were implemented to meet the new BMP
manual. There are (6) bio-retention cells with detail sheets
that depict drainage area, outlet velocities, bypass
methodology, and provided by Dalton Engineering An
executed operation and maintenance agreement is also
provided for bio-retetion cells 1-6. (see design talcs titled
"DESIGN CALCULTIONS FOR DWQ CROSSING
PERMITS" and larger details sheets titled "STREET A"and
"STREET B').
Comment 2b: Please provide details on your pre-treatment method (i.e.
vegetated Swale details, supporting calculations, etc.)
Response 2b: REVISED: See response 2a.
Comment 2c: All level spreaders must include a forebay.
Response 2c: REVISED: See response 2a.
Comment 2d: Please provide details on your bypass method (typical details
and supporting calculations).
Respo~zse 2d: REVISED: See response 2a.
Comment 2e: Please revise the level spreader length (or redesign utilizing a
more appropriate BMP) that you have proposed for level
spreaders 3, 5-11, as they are too short.
Response 2e: REVISED: See response 2a.
Comment 2f: Most areas where level spreaders have been proposed appear to
have a higher slope.
Response 2f REVISED: See response 2a.

Since 1979
THE JOHN R. McADAMS COMPANY, INC.
Ms. Lia Myott
October 3, 2007
Porto Fino -Clayton, NC
WLT-07010
Page 3
Comment 2g: Please provide 1:50,000 scale drawing of level spreaders 13,
14, and 15.
Response 2g: Per our September 28'" 2007 meeting level spreaders 13, 14, and
IS were designed to the old BMP manual, and approved by
Johnston County stormwater staff. (3) copies of the 1:50 scale
drawings of level spreaders 13, 14, and 1 S are provided by
Sanderson Engineering (see large detail sheets titled"Portofino
Phase 1 and 2 -Level Spreaders 13, 14, and 15').
Comment 2h: Please include construction notes/instructions for installation of
the level spreaders.
Respo~ise 2h: Per our September 28`" 2007 meeting level spreaders 13, 14,
and 15 were designed to the old BMP manual, and approved
by Johnston County stormwater staff. (3) copies of the 1:50
scale plan sheet drawings of level spreaders 13, 14, and I S are
provided by Sanderson Engineering. Construction notes are
provided on the 1: SO detail sheets (see large detail sheets titled
"Portofino Phase 1 and 2 -Level Spreaders 13, 14, and I5').
Approved stormwater Management Plans:
Comment 3a: Please provide one (1) copy of the approved (Johnston County)
stormwater Management Plans for the entire project.
Response 3a: As discussed in our September 28`h 2007 meeting, and per the
response letter provided by Mr. Steven Sanderson dated
September 24, 2007, "There is not one (1) copy of the approved
Johnston County stormwater Management Plan for the entire
project. Johnston County approves projects on a phase by
phase basis. I have attached copies of the approved stormwater
Management Plan Approvals for both sections along with
subsequent revisions for Phase 1. "

Since 1979
THE JOHN R. McADAMS COMPANY, INC.
Ms. Lia Myott
October 3, 2007
Porto Fino -Clayton, NC
WLT-07010
Page 4
Comment 3b: Please provide a written response to DWQ regarding how the
stipulations in the Johnston County Stormwater Management
Approval have been addressed.
Response 3b: As discussed in our September 281h 2007 meeting, please see
the responses provided by Mr. Steven Sanderson that address
each of the corresponding items in the Johnston County
Stormwater Approvals of Phase 1 and Phase 2.
Comment 4: Stub Roads: DWQ has concerns regarding cumulative impacts.
Please explain the two stubbed out roads located on the eastern
property boundary. The proposed thoroughfare road seems to
have riparian buffer and stream impacts that are not shown on
this application.
Response 4: As discussed in our September 28`h 2007 meeting, the stub road
in the northeast quadrant of the project is required by
Johnston County for an emergency exit to the adjacent
Southwick Subdivision, with no other stream and/or wetland
crossings needed. The thoroughfare road is an existing farm
road and dedicated easement to the land-locked property to the
east, and must be kept open to access the adjacent parcels. As
discussed, the overall impact map has been revised to depict the
actual location of the stream and stream buffer, which is
located downstream of any impacts from the roadway.
Consideration of this response is greatly appreciated. If you should have any
questions or require additional information, please do not hesitate to contact
me at [phone].
Sincerely,
THE JOHN R MCADAMS COMPANY, INC.
~''~
J. Kevin Yates
Senior Environmental/Wetland Scientist
Stormwater and Environmental Department
Enclosures

Addendum to the Pre-Construction Notification and "Buffer Rules" Application Required for
Projects Submitted Under the
"Express Review Program"
North Carolina Division of Water Quality Version 5.0
October 1, 2006
Email Address: 401 [e-mail]
Purpose: To provide a detailed explanation of the information required by the Division of Water Quality
in order to expedite the review of applications for 401 General Water Quality Certifications, Isolated
Wetland Permits, Stream and Wetland Mitigation Plans and Riparian Buffer Approvals (Please Note: do
not leave any questions unanswered or use terms such as "N/A" without an explanation).
Fees:
Riparian Buffer Authorization:
Riparian Buffer Minor Variance:
Coastal General "Major Variance":
Isolated Wetland Permit:
- - ,
Minor (< 150' stream or < 1 acre wetlands) $1,000.00
(exclusively or "in addition" to) $2,000.00
$1,000.00
$1,500.00
General $1,000.00
Please read the entire document before attempting to determine the proper fee. Fees are additive for
particular projects.
Things to keep in mind when filling out the application:
A specific answer must be provided for each question. For instance, if a numerical answer is requested
then a numerical answer must be provided along with the supporting information necessary for DWQ staff
to verify that the number is accurate. Likewise, if explanations are presented to justify certain responses,
the explanations must be completely supported by documentation. DWQ staff cannot assume that
unsupported or undocumented information is accurate. "N/A" is not an acceptable answer for any
question since the DWQ Staff reviewing the application must have an opportunity to determine whether or
not any requested informs#ion is pertinent.
All forms, guidance, worksheets, applications, etc. used must be the current versions as posted on our
web site at http://h2o.enr.state.nc.us/ncwetlands. The Express Review Program website can be found at
http://h2o.enr.state.nc.us/ncwetlands/express_review.htm. Please note that it will be responsibility of the
applicant or the applicant's consultant to verify that the current versions are used. The versions posted
on our web site will be considered to be the current versions.
You are a very important part of the success of this program, if you have suggestions or clarifications
please send your comments to the Wetlands/401 Unit of the DWQ (via email at
401 [e-mail]).
Filling Out the Pre-Construction Notification Application:
The Corps of Engineers (USAGE)/DWQ official, joint Pre-Construction Notification (PCN) Application
must be used as a basis for the expedited review process. The completed application should be
presented first and the supporting information tabbed and collated in the same order. Using a custom
format is not recommended. The open squares dare checklist items. The following items correspond to
the numbering system on the Pre-Construction Notification Form (PCN):
USE CHECK BOXES TO TRACK PROJECT INFORMATION

SECTION 1. PROCESSING
C,J~ 1 8s 2.The USACE determines which Nationwide, Regional, or General Permit is
required. If you have verified with the USACE which permit they intend to use for
your project or if you already have written approval from the USACE, please
indicate by adding "verified" or "verified, attached", respectively, in the blank next
to the Permit number requested.
NWP 29 / GC 3402 are both in process
^ Attach the USACE Approval if you have it.
3. It is not anticipated that the expedited process will be requested for this situation.
We are going through DWQ Express Review.
~ 4. If you propose to impact 150 feet or more of perennial stream or 1 acre or more
o we an an onsi a mi iga ion is no propose i is recommen e a you
either locate an acceptable private bank with available credits (with
documentation to show that the bank can and shall provide the credits needed)
or obtain approval from the EEP for the entire amount of stream and or wetland
as DWQ will make the final determination as to whether or not mitigation applies.
A complete Express application is not considered received unless an EEP
approval letter is attached if mitigation is requested through EEP. Please note
that the USACE may have different mitigation requirements and thresholds.
No impacts over 150 If of perennial stream and/or 1 acre or more of
wetlands are proposed.
^l 5. State whether your project will require a CAMA Minor, Major or General Permit
and give the status of the permit.
No CAMA permits are required.
SECTION II - APPLICATION INFORMATION
1. 15 NCAC 2H .502(fl reads as follows: "Who Must Sign Applications. The application
shall be considered a "valid application" only if the application bears the signature of a
responsible officer of the company, municipal official, partner or owner. This signature
certifies that the applicant has title to the property, has been authorized by the owner to
apply for certification or is a public entity-and has the power of eminent domain. Said
official in signing the application shall also certify that all information contained therein
or in support thereof is true and correct to the best of his/her knowledge."
C7~ Please indicate how the applicant meets the above definition and provide
supporting documentation.
^/ Please provide all of the requested contact information including a fax
number and email address.
Provided in PCN
2. ^~If the application is not signed by the applicant, please attach the agent authorization
letter. The applicant must sign the agent authorization letter. The applicant's name
and position must also be spelled out as many signatures are difficult to read.
Executed Agent Authorization enclosed.
3. ~ Please provide all of the requested contact information including a fax number and
email address.
Provided in PCN

3
SECTION III -PROJECT INFORMATION
The following is the most critical of all the information that you must provide. The quality and detail of the
information will often determine the- expeditiousness of the review. The following is a checklist of the
types of pertinent information required at a minimum:
Maps and Plans:
~~ The most recent version of the 1:24,000 USGS Topographic Map- Please cleanly
delineate the site boundaries, etc. on the map. If the delineation obscures any of the
features, it is recommended that a clean copy be provided. Please indicate the
quadrangle name. You can go to the USGS web site (http://mac.usgs.gov/maplists/) to
verify the most recent version.
Enclosed
the Neuse River Basin, Tar-Pamlico River Basin, Randleman Lake Watershed and the
Catawba River Basin, also recommended for all projects) -Please cleanly delineate the
site boundaries, etc. on the map. If the delineation obscures any of the features, it is
recommended that a clean copy be provided. Please indicate the page or map number
from which the copy of the map was made. Copies of the current soil survey and/or soil
survey map sheets can be obtained from the local NRCS County Office
(http://www.nc.nres.usda.govn. GIS soil layers are not acceptable.
Enclosed
Vicinity map -Please clearly mark the location and approximate boundaries of the
property and project on the map. Please indicate north and scale. Please include
applicable road names or State Road numbers.
See Overall Site Plan /USGS quad Enclosed
.--
^ The Site Plan -The most critical map to be provided is the site plan. You must provide
full sized plans. The following is the minimum list of plans that are typically needed.
^~'Pre-construction/Pre-existing conditions -This sheet must be scaled and
include all jurisdictional and non jurisdictional wetland, stream, water features,
State regulated buffers, topographic contours with elevations, approximate extent
and nature of forest, field, landscaping, or other cover. Any existing structures and
impervious area must be shown. Existing utility lines and easements must be
shown. Existing roads, culverts, and other pertinent features must be shown. North
arrow and the scale must be shown. Please note that the impact boundaries on the
maps should correspond to the flagged impact boundaries in the field.
Ortho Photo with Project Boundary Enclosed
^~~ Proposed conditions -These sheets must be scaled and show all existing
jurisdictional and non jurisdictional wetland, stream, water features, and State
regulated buffers (delineated into Zone 1 and Zone 2) must be underlain on the site
plan(s). The plans must show all built-out structures and impervious cover. The
plans must include the final grading contours with elevations. The plans must
indicate all utilities and easements. It is likely that several versions of the final built-
out site plans will be necessary.
See Overall Site Plan I Impact Maps Enclosed
^ Drainage Plans -Final drainage plans must be included. The plans should include
the locations and pertinent elevations and sizes of the collection system and
drainage ways. All inlets and outlets must also be shown with pertinent elevations.
Scaled stormwater BMPs must also be indicated as required by DWQ rules and
policies. In certain cases, final stormwater management plans must also be
provided, but that will be addressed later in this document.

4
Project less than 24% impervious /Level Spreader details and drainage
area maps Enclosed
~' Plats -The plans must show the location and layout of all sub-divided parcels with
lot identifications. Platted parcels must be developable without further impacts to
jurisdictional and non-jurisdictional wetlands, streams, water features, and State
regulated buffers.
See Overall Site Plan Enclosed
^~ Proposed Impacts -All impacts to jurisdictional and non-jurisdictional wetland,
stream, water features, and State regulated buffers must be shown and labeled on
the site plans. All excavation, fill, flooding, stabilization, and other impacts that will
be conducted in or near jurisdictional and non jurisdictional wetland, stream, water
features, and State regulated buffers must be indicated.
Impact Maps Enclosed
Wetland Impacts (on the site plan):
None Proposed
C3~ Precise grading and final elevation contours must be provided. Existing vegetation and
any clearing must be specified.
All subsurface utility lines must indicate the location of anti-seep collars. Construction
detail for anti-seep collars must be provided.
^~ Roadway or other crossings of riparian wetlands may require floodway culverts to
maintain existing hydrological conditions.
~ When surface drainage features or groundwater recharge areas that feed or would
reasonably feed wetlands that are not to be filled are made impervious, it may be
necessary to direct some stormwater runoff to those areas in order to maintain hydrology.
You must identify these areas and address them. Supporting explanations and discharge
information must be provided to show that the wetland would not be eroded or receive
too much or too little hydrology. In many cases this could help satisfy part of a
stormwater management plan.
~ Flooding
^~ Draining
Stream Impacts:
212 linear feet of intermittent stream impacts proposed
i~ Stream impacts must be clearly shown on the plans. The centerline as well as the banks
of the stream must be surveyed or located by GPS for the portion of the stream to be
impacted.
Culverting:
J~ The inlet and the outlet of the culvert should be aligned with the stream as much as
possible. Inlet and outlet elevations and streambed elevations should be indicated.
C3~ Any widening of the stream must be shown with elevations.
^~ The extent of and plan details for all dissipation or grade control devices should be shown
with pertinent elevations.

5
C~- For shorter culvert sections, such as for road crossings, a longitudinal cross section that
shows the stream bed invert at the inlet and outlet, the existing stream bank elevations
and the invert of the inlet and outlet of the pipe(s) must be provided.
^ For shorter culvert sections, such as for road crossings, a vertical cross section must be
provided that shows the stream cross section at the inlet and outlet overlain with the
culvert and fill cross section.
For bottomless culverts or other spans, a vertical cross section should be provided that
shows the minimum distance from each span to each stream bank, the stream cross
section, the height of the span above the stream and the minimum distance from the
edge of each footer to each stream bank.
'D' For bottomless culverts or other spans, a plan view must be provided that shows the
location of the spans and the stream banks.
[~ For longer culverts or culverts that will pass beneath substantial impervious cover, it will
be necessary to provide adequate plan detail to show that discharge velocity/energy will
be adequately dissipated.
Cross section details must be provided showing the provisions for aquatic life passage.
Aquatic life passage through culverts is typically achieved by placing the invert of the
culvert below the existing bed of the stream per the USACE or North Carolina Wildlife
Resource Commission guidelines. Other methods such as baffles may also be used.
Please be aware that such placement may require the use of grade/velocity control
measures up or down stream of culverts on steeper streams to prevent head-cuts or
streambed erosion. The culvert placement relative to the streambed can be indicated on
the longitudinal profile. Grade and velocity control measures must be indicated on the
plan view and typical designs should be provided.
^~ Multiple culverts, wide culverts or sectioned box culverts typically require the use of sills,
off-setting or other means to match the cross section of the existing stream (in order to
maintain stream stability and provide aquatic life passage). A vertical cross section of the
culverts should be shown overlain with the up and downstream stream cross section
/ including the stream flood-prone area.
t~ Impacts associated with dam construction must indicate and enumerate all fill associated
with the dam footprint, spillway and any bank stream bank stabilization. The length of
stream impounded must also be indicated and enumerated.
Stream Relocations:
None Proposed
C~ Stream relocations must be conducted as specified in General Certification numbers
3402 and 3404 (available on the Wetlands Unit web site). Stream relocation plans must
include:
~ Morphological measurements (see Appendix B of the Internal Technical Guide for Stream
Work in North Carolina available on the Wetlands Unit web site) -not all of the
measurements are applicable in every instance.
C3~ Typical stream cross sections - Typically, a riffle cross section and a pool cross section
that includes the entire flood prone area. The bankfull and flood prone area elevations
should be indicated. Similarly, a riffle cross section of the reference stream(s) should be
provided.
Plan view -Provide scaled plans that show the location of the proposed (preferably with
stationing) and the existing stream. In most instances, the bankfull contours and flood

6
prone area contours, in stream structures, bank revetments/stabilization, channel plugs,
planting plan, vegetation conditions, stormwater outlets, grade controls, bridges, culverts,
sewer lines, roads, fencing, and easement lines should also be provided.
)~ Longitudinal Stream Profile - A scaled profile that indicates the thalweg, bankfull, and top
of bank elevations should be provided for the design and reference streams. In many
cases, it will also be necessary to show the existing land elevations for the design
stream.
,~ Planting Plan - A planting and/or vegetation management plan should also be provided
that makes use of appropriate native vegetation. The plan should indicate the extent,
density, and species of plants to be provided.
In-stream structure, bank revetment/stabilization, and stormwater outlet typicals -
Detailed, typical plans should be provided for all in stream structures, bank revetments or
stabilization, an stormwa er ou a s. a ypica s sou inc u e ma ena s an
specifications as well as relative lengths, positions, and angles.
Sediment transport analysis - A sediment transport analysis should be provided based
on the current, relevant, accepted practices. The sediment transport analysis should be
relevant to the streambed load type and should predict bed load transport equilibrium.
~ Permanent conservation easement or similar means of protection must also be provided.
Other Information:
q~1. The project should always be referred to by this name in all correspondence as well
as the DWQ # once it is provided.
Porto Fino Subdivision
2. This only applies to DOT projects, which are not expected to utilize the Express
Review Program.
I~ 3. This should be the size of the project as identified by the USACE for 404 Permits or
by the Division of Water Quality for Buffer Approvals and Isolated Wetland Permits.
~ 4. Please provide the name (as depicted on the USGS topographic map and DWQ
Stream Classification Lists) of the nearest water body(ies) to which your project is a
tributary to (e.g. "Neuse River (Falls Lake below normal pool elevation)"). (Do not
simple state "stream", "river", "ocean", "sound" or "lake".) Please provide the "stream
index number" of the named water body or water body section (e.g. "27-(1)"). Also,
please provide the full water quality classification (e.g. "WS-IV NSW CA") of the water
body. This information can be obtained from the DWQ web site
http://h2o.enr. state. nc. us/bims/Reports/reportsW B. html.
/ USGS -Flowers Quadrangle I ut directly to Neuse River (WS-IV ,NSW)
C~1 5. Please state which river basin and sub-basin that your project is in (e.g. "Neuse River
Basin, NEU01"). This information can be obtained from the DWQ web site
http://h2o.enr.state.nc. us/bims/Reports/reportsWB. html.
/ Neuse River (HUC 03020201)
t] 6. Conditions should also be indicated on the existing site plan where applicable.
Photos (including aerial photos) can be helpful in describing the existing conditions.
Ortho of Existing Conditions Enclosed
~7. You must provide an attachment that explicitly describes what the proposed project
will entail from the planning stage to final construction.
Narrative in Cover Letter and PCN Enclosed

7
^/ 8. This can be a simple explanation, but it is critically important because the purpose
dictates how the no practical alternatives are reviewed.
The purposed of the proposed project is create a residential subdivision to
service the growing community.
SECTION IV -PRIOR PROJECT HISTORY
'C] Please include copies of all 401 Water Quality Certifications, Isolated Wetland
Permits, Buffer Approvals, USACE Permits, CAMA Permits for the site as well as a
copy of the final approved, site plan.
Provided in PCN
SECTION V -FUTURE PROJECT PLANS
!~ For projects utilizing the express review process, all impacts both present and
potential uture must a in icate or ins ance, a oca ion or con igura ion o
platted lots sometimes suggests that future impacts will be necessary to build,
access, or otherwise develop such lots. Failure to account for such potential impacts
could delay or disqualify a project from the rapid review process. If you believe that
the lot can be developed without impacts, but you anticipate that your assertion may
be questioned, it is recommended that you provide a potential building foot print
and/or grading plan to show that future impacts could be avoided.
None anticipated at this time.
SECTION VI -PROPOSED IMPACTS TO WATER OF THE US
1. It is recommended that the individual impacts be described if there are special things
to note about the impacts. Typically the most important thing is to have detailed
accurate site plans as described above. Please make sure they are clearly labeled.
Please include all proposed temporary impacts.
^r Also, a current, signed delineation map from the USACE should be provided (if
available) and a map locating the stream origins signed by the appropriate DWQ
Staff must be provided if applicable.
Wetlands and Streams have been verified but there is no signed wetland
map.
~1 2. Each impact to a wetland must be clearly labeled and identified on the site plan. The
type of impact must be clearly stated. If the impact is temporary, a specific plan must
be described or shown as to how the wetland will be restored. Keep in mind that the
USACE delineates some features as wetlands that DWQ calls streams. Please list
any impacts in this table that DWQ would identify as a stream. If there is any doubt,
it is recommended that the impacts be listed as streams. Please follow current DWQ
policy with respect to whether a stream is perennial or not. It is recommended that
you assume that a stream is perennial (unless you are positive that it is not) so if
mitigation is required then the appropriate amount of mitigation would be anticipated
or requested from the EEP or private bank. If the EEP or private bank has pre-
approved too short of an amount of stream or if inadequate mitigation is proposed,
then that situation will result in delays.
.~1~ 3. Sometimes it is difficult to determine whether a feature is a modified natural channel
or a ditch, especially in the eastern part of the State. Soils, drainage features,
topography, macroinvertebrates, and similar factors, all are important for making that
determination.
^ 4. Other items to address not specifically requested in the application include
downstream sediment starvation, thermal pollution, low flow releases from dams, and
aquatic life passage. Other important considerations are buffer reestablishment or

8
mitigation around ponds on buffered streams. The site plan should include the
precise elevation contour of the normal pool as well as the dam footprint. Mitigation
is required for wetland flooding of an acre or greater and for stream fill (if over the
150 foot threshold) under the dam footprint and any outlet stabilization.
SECTION VII -AVOIDANCE AND MINIMIZATION
Avoidance and minimization are critical aspects of an application particularly if you desire the application
to be processed expeditiously. The following is a checklist of avoidance and minimization questions that
DWQ Staff often look for in applications.
Are there any stream crossings at angles less than 75° or greater than 105°?
No
^~ Are there any stream crossings that cross two streams above or at the confluence of those
streams .
No, the spine road alignment was shifted during the July 16th site visit with DWQ
staff to avoid this scenario.
Are there any stream, wetland, water, and/or buffer impacts other than perpendicular road
crossing near the edges of the property?
No
^~ Can the stream be relocated as a natural channel design as opposed to culverted or
otherwise filled?
No, due to the linear nature of the spine road
Is any single stream crossed more than once?
No
Can property access routes be moved or reduced to avoid stream, wetland, water, and
buffer impacts?
No
Can a building, parking lot, etc. be realigned to avoid impacts?
No
B- Can the site layout be reconfigured to avoid impacts?
No
~ Can headwalls or steeper side slopes be used to avoid/minimize impacts?
Steeper slopes are being used at stream impact # 3.
Can a retaining wall be used to avoid/minimize impacts?
Retaining walls will be used where needed.
~ Can cul de sacs be used in place of a crossing?
Cul de sacs were utilized throughout the project to avoid further stream impacts.
[7~Can lots be reshaped or have shared driveways to avoid impacts?
Lots have been re-shaped and alignments shifted to avoid further stream impacts.
If based solely on the practicable physical possibility, the answer is "yes" to any of the above questions
then you must have to provide substantial and convincing justification as to why the impacts are
necessary. If the impacts are required by a local government or other agency, the claim must be
supported with appropriate written documentation from the local government or other agency. Most
projects typically involve the need to justify avoidance and minimization. If this information is not readily
available, then the express review process may not be the appropriate venue to use. Providing
alternative plans (such as plans that avoid the impact, minimize the impact and the preferred plan, similar

to those used in environmental assessments) and explanations as to why the preferred plan is needed
and why the alternative plans won't work are many times helpful in the no practical alternatives review.
SECTION VIII -MITIGATION
Mitigation for the Express Review Program, final mitigation plans must be presented up front. The final
plans (except for plans that propose payment into the Ecosystem Enhancement Program (EEP), Riparian
Buffer Restoration Fund, private mitigation banks, or similar banking instruments) must contain detailed.
plans, specifications, calculations and other supporting data that show that the appropriate mitigation will
be achieved at the ratios required. The design plans must be developed to at least the "90%" level.
Monitoring plans must be final and specific. Any means of permanent protection, such as a permanent
conservation easement must be provided. If you elect to use the EEP or a private mitigation bank, it is
recommended that you request the maximum possible mitigation amount that DWQ may require so that
you will not have to get further approval from them on short notice. The EEP and private banks are not
part of the expedited review process and cannot be expected to meet any such deadlines. There will be
no conditional expedited approva s t a require ina p ans a a a er a e. is no recommen e
innovative mitigation techniques or greater than 10% preservation be requested as part of an expedited
process.
Mitigation will be provided, see narrative enclosed.
SECTION IX
If your project requires the. preparation of an environmental document under NEPA or SEPA and an
approval letter has not been issued by the State Clearinghouse, then you cannot apply under the
expedited review process. It is your responsibility to find out if such documentation is required.
None required
SECTION X
There are many aspects of the Buffer Rules that must be addressed in every application, if applicable.
The first and most important thing to keep in mind is that allowable activities that require written Approval
from DWQ triggers a review of the entire project for compliance with the Buffer Rules.
Diffuse Flow 8~ Stormwater Management:
The most common issues that arise involve the requirement for diffuse flow of stormwater
through riparian buffers. Basically one of three things must be indicated in regards to all
"new" stormwater that is collected and subsequently discharged. First, provisions for
diffuse flow through the protected buffer must be made. This usually involves the use of
level spreading devices designed to the latest DWQ guidance on level spreader design,
which is available on our web site. Please keep in mind that it does not matter how far a
discharge point is from a buffer. The stormwater must be flowing in a diffuse manner at
whatever point it eventually reaches the buffer. If the stormwater will not be flowing in a
diffuse manner through the protected buffer at the point it reaches the buffer, then one of
the following options may be allowed:
Grassed swales and (3) level spreaders are provided in Phases 1 and 2, and were
approved through Johnston County. Mr. Breland with Dalton Engineering has met
with DWQ staff to discuss Phase 3 diffuse flow devices, and will be designing these
mechanisms in accordance with the new BMP manual.
^~ You may provide a nitrogen removing measure such as a forested filter strip,
grassed swale, stormwater wetland, etc. The measure employed should be
designed according to the NC DENR Stormwater Best Management Practices
Manual or other DWQ Guidance available at http:
//h2o.ehnr.state.nc.us/ncwetlands/mitresto.html. After the nitrogen is treated, the
stormwater can be directly conveyed through the buffer with written DWQ approval.
Natural draws with grassed swales will be utilized as conveyances throughout the
site.

10
[y You may discharge the stormwater to an existing man-made conveyance that
currently conveys stormwater through the protected buffer (assuming the
conveyance was not constructed in violation of the Rules) as long as that
conveyance does not need to be altered to convey the flow. Please remember that
there are no other choices. The following checklist is intended to help insure that
your application will not be deemed incomplete as a result of improper stormwater
design.
Natural draws with grassed swales will be utilized as conveyances throughout the
site.
stormwater Management (for Buffer Rules compliance only -Also, see Section XI):
© All stormwater out-falls must be clearly shown and labeled on the site plan for projects in
Buffered watersheds. List each out-fall as labeled: The natural draws /grassed swales
are a e e as exis ma c anne s
nomenclature that Johnston County Erosion Control prefers on drawings and
applications.
Option 1: Level spreading devices designed to the latest DWQ Guidance, and
devices that merely control velocity but do not provide diffuse flow such as rip rap
dissipators are not proposed. List each of these out-falls as labeled on the site
plan and provide a DWQ worksheet available at
http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.html: Level spreaders 1-15 are
labeed on the overall site plan and detail sheets are provided.
Option 2: Nitrogen removing measures designed to DWQ Standards are
proposed for discharges for which diffuse flow through a protected Buffer cannot be
met. List each of these out-falls as labeled on the site plan and provide a DWQ
worksheet available at http://h2o.ehnr.state.nc.us/ncwetlands/mitresto.html:
Grassed swales are proposed in Phase 1 and 2. Bio-retention will be utilized
in Phase 3.
[J~ Option 3: The stormwater will be discharged to an existing man-made (not
including modified natural channels) conveyance that carries the stormwater
through the Buffer. The conveyance was not constructed in violation of the Buffer
Rules. List each out-fall as labeled:
~ All stormwater out-fall must meet one of the options above. (Note: if you cannot check this
box your application will likely not be accepted into the express review process.)
Site Plans:
^- All applications on properties with DWQ protected buffers must clearly depict the buffers
and any impacts to the buffers on the site plans. The impact maps should clearly depict
both zones of the protected buffers and the proposed impact areas (provided in square
feet).
See Site Plan and Impact Maps Enclosed
Surtace Water 8~ Buffer Delineations:
qi Any surface waters subject to DWQ protected buffers must be field located and accurately
depicted on the site plans and impact maps. The width, dimensions and pattern of the
surface water must be delineated. The surface water location must not be taken simply
from a USGS map, soil survey or local municipality's map. The buffers must be measured
from the surface water as required within the applicable buffer protection rule (e.g., all
buffers along streams subject to the Neuse and Tar-Pamlico Buffer Rules must be
measured from the "top-of-bank" of the stream and not the centerline of the stream). All
streams must be surveyed or located by GPS and shown precisely on the site plans.

11
Impact Table:
q/ Please provide additional impact tables that clearly state the area of impact for each
corresponding impact site.
See Impact Maps Enclosed
Variances:
Projects that require a Major and/or "General" Variance will not be eligible for the use of the
Express Review Program (with the exception of the Coastal General "Major" Variance.
None required
Mitigation:
s oppose o app is i
plans must be presented up front (see requirements for Section VIII above). The mitigation
plans must comply with the applicable buffer mitigation rule.
Stream buffer mitigation is not required for the proposed impacts.
SECTION XI - STORMWATER
Please provide the following information in regards to potential stormwater requirements:
]~ The total acreage of the site. 303 (acres)
The total built-out impervious acreage Phase 1: 11.84-acres ~ 14% impervious
Phase 2: 11.17-acres ~ 12% impervious
Phase 3: 15% or less impervious
~ The total area that will be disturbed ~ 150-acres including temporary and permanent
disturbance
~ If the total area exceeds 20% imperviousness, the development on the site is uniform in
density, and you claim that the total impervious area is less than 30%, you must provide a
complete, detailed breakdown of the assumed built-out conditions. The breakdown must
be detailed enough to show that all potential impervious areas are accounted for.
The project will be 15% impervious or less.
Cam- If there are concentrated areas of development such as multi-family, commercial, cluster,
club houses, etc. that exceed 30% imperviousness and the total imperviousness for the site
does not exceed 30%, a stormwater management plan will likely be required for those
areas that exceed 30% imperviousness.
~-- stormwater management plans must be complete with a final design and an executed
Operation and Maintenance Agreement. There will be no conditional stormwater approvals
for the express review process that allow for approval of the final plans at a later date.
Worksheets must be provided that are available at
http://h2o.ehnr.state. nc.us/ncwetlands/mitresto. html.
Operation and Maintenance Agreements are Executed and were submitted.
SECTION XII -SEWAGE DISPOSAL
O~ Response must be clear and detailed. Any disposal method that suggests further impacts
may be required other than those shown must be clearly addressed on the site plans.
On-site septic systems will be utilized.

12
SECTION XIII
t~ Answering yes to either of these responses automatically precludes you from the express
review process.
SECTION XIV -SIGNATURE
~~The name, position and/or title of the applicant must be in type or long hand script here with
the signature. It should be the same person as described in Part II.
If you have any questions about these requirements, please email the Express Review Program at
401 [e-mail] and include your question and phone number and the appropriate staff will
respond as soon as possible.

PRO]ECT N0. FOR-07.326 pORTO FIND THE JOHN R. McADAMS
FILENAME: F~RQ7326X
COMPANY, INC.
CJ SCALE:

,~
~
STREAM IMPACT EXHIBIT
ENGINEERS/PLANNERS/SURVEYORS
~
- 50 LET ^~~7L Dc
i' LV YN 1 LU7. NORTH CAROLINA RESEARCH TRIANGLE PARK, NC
P.O. BOX 14005 ZIP 27709-4005
I/] DATE:
Q$-3~-Q7 [phone]

PROJECT N0. FOR-07326 pORTO FIND THE JOHN R. McADAMS
INC
COMP
NY
„~, FILENAME: FQRO7326X
.
A
, -

C7
SCALE:
~~
~ STREAM IMPACT EXHIBIT ENGINEERS/PLANNERS/SURVEYORS
.~
= 50 RESEARCH TRIANGLE PARK, NC
~ FLOWERS, NORTH CAROLINA P.o. Box 14005 ZIP 27709-4005
[/] DATE: OH-31-O7 [phone]

NEU5E STREAM BUFFER ZONE I
NEU5E STREAM BUFFER ZONE 2
\ \ \ I I \ I \ STREAM IMPACT! C13LFI I
BIORETENTION CELL #b
1 I I I - III I
I I \I I I I 11
BIORETENTION I I I o I \\ I I I I I I I
/ LL #
Q � I
1
D ZONE I IMPACT: 0.01 AGRES (ROAD GROSSING D
0.01 AGRES (BIORETENTION)
ZONE 2 IMPACT: 0.02 AGRES (ROAD GROSSING O�T q ZQQ� z
0.002 ACRES (BIORETENTION)
OENR • W'gfER QUALI x
PROPOSED INTERMITTENT STREAM IMPACT: G3 L%-T0ND h4Dtq'R`"pTERB
GRAPHIC SCALE
50 O 25 50 100
INSET 3 1 inch = 50 ft.
PROTECT N0. FOR -07326
PORTO FINO
THE JOHN R. McADAMS
11
FILENAME: FOR07326X
COMPANY, INC.
d
STREAM IMPACT EXHIBIT
ENGINEERS/PLANNERS/SURVEYORS
SALE:
y
1" = 50'
FLOWERS, NORTH CAROLINA
RESEARCH TRIANGLE PARK, NC
P.O. BOX 14005 ZIP 27709-4005
DATE:
08-31-07
[phone]

Office Use Only: Form Version March OS
USAGE Action ID No. DWQ No. ~ K~ ~ ~ " ~ ~ 22
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing
Check all of the approval(s) requested for this project:
® Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
^ 401 Water Quality Certification ^ Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: NWP 29 Residential
Development / GC 3402
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here:
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check r~~~n~ ~,
~.r~~ ~
II. Applicant Information
[SGT Q u "Z007
1. Owner/Applicant Information A4mr
Name:Walthom Group IV y~~A^'neT04tpA1~~~RANCy
Mailing Address: 442 'h East Main Street
Clanton NC 27520
Telephone Number: [phone] Fax Number: [phone]
E-mail Address: rbailey(a~walthomgroup.com
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name:The John R. McAdams Combanv. Attn: Kevin Yates
Company Affiliation: Sr. Environmental/Wetland Scientist
Mailing Address:2905 Meridian Parkway Durham, North Carolina 27713
Telephone Number:919-361-5000 Fax Number:919-361-2269
E-mail Address:.. a~(a~johnrmcadams.com
Updated 11 / l /2005
Page 5 of 13

III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps maybe included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: Porto Fino Subdivison
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax P1N):0747-01-15-6880
4. Location
County: Johnston Nearest Town: Clatyon
Subdivision name (include phase/lot number):
Directions to site (include road numbers/names, landmarks, etc.): The proposed proLct is
located on the south side of NC Hw 4~pproximately 0.5 miles west of its intersection
with Buffalo Road, west of Clayton, Johnston County, North Carolina.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35.6415°N 78.3612°W
6. Property size (acres):303-acres
7. Name of nearest receiving body of water: Neuse River
8. River Basin: Neuse - HUC 03020201
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: The project site contains mostly re-planted pines and shrubs,
with former agricultural lands and old landing strip. Land use within the vicinity is a
combination of mostly residential and forested land.
Updated 11 / l /2005
Page 6 of 13

10. Describe the overall project in detail, including the type of equipment to be used: The
proposed project consists of the construction of a residential subdivision with low-densit~rn,
0.75-acre lots with single-family housing. All impacts are proposed above the 100-
floodplain. The project will include roads, utilities, and septic systems on each lot.
Traditional equipment will be used such as front-end loaders, graders, and earth movers. The
construction of the project will be separated into 3 phases, however, the applicant would like
to apply for the 404/401 permit as if it were one phase.
11. Explain the purpose of the proposed work: The purpose of the proposed work is to
construct a residential subdivision.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. According to Mr. Alsey Gilbert, Ms. Jean Manuele (USACE
representative) and Kevin Yates (former USACE rep) have verified the streams and wetlands
associated with the project on different occasions. Although there is no formal wetlands map at
this time there are no wetlands above the 100-yr floodplain, and there are no wetland or stream
impacts proposed below the 100-yr floodplain. There are only jurisdictional streams located
within the project boundary. The site has been historically known as the Flowers Tract. Mr.
Thomas Brown (USACE representative) has conducted apre-application meeting on the site on
July 16 2007. Ms. Amy Chapman conducted a Neuse River stream buffer determination on
February 16, 2006, (DWO Buffer Letter attached, No. 06-0171), and apre-application meeting
letter
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No future permit requests are anticipated for this project.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
Updated 11 / l /2005
Page 7 of 13

permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
12. Provide a written description of the proposed impacts: The project has proposed permanent
stream impacts totaling 215 linear feet for construction of the spine road to access Phases 2
and 3. The stream impacts are associated with the re-alignment and expansion of an existing
farm road in the southeastern quadrant of the project to bring it up to DOT standards, and one
new road to access Phase 3 (,see stream impact sheets 1-3). The spine road is being
constructed to access Phase 3 and to allow the adjacent property owner to access their land-
lockedparcel.
1. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due tc hoth structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of
Site Number Type of Impact (e.g., forested, marsh, 100-year
Floodplain Nearest
Stream Impact
(acres)
(indicate on map) herbaceous, bog, etc.) (yes/no) (linear feet)
N/A
Total Wetland Impact (acres)
2. List the total acreage (estimated) of all existing wetlands on the property: All wetland areas
within the 100-year floodplain. There are no wetlands within the proposed developable area.
3. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must he included. To calculate acreage. multiply lenuth X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact Perennial or
Intermittent? Average
Stream Width
Before Im act Impact
Length
(linear feet) Area of
Impact
(s . ft.)

Sheet 1 unnamed tributary
New Culvert Important
3
93
279
to Neuse River Intermittent

Sheet 2 unnamed tributary
Culvert Expansion Important
4
44
176
to Neuse River Intermittent
Updated I l/1/2005
Page 8 of 13

Inset 3 unnamed tributary New Culvert Important 3 75 150
to Neuse River Intermittent
Total Stream Impact (by length and area [square feet]) 215 perm 455 s.f.
4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredgin ,flooding, draina e, bulkheads, etc.
Open Water Impact
Name of Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
(indicate on ma) ocean, etc.) (acres)

N/A
Total Open Water Impact (acres)
List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (square feet): 455
Wetland Impact (acres): N/A
Open Water Impact (acres): N/A
Total Impact to Waters of the U.S. (acres) 455
Total Stream Impact (linear feet): 215 imp.- Int.
permanent
6. Isolated Waters
Do any isolated waters exist on the property? ^ Yes ®No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE.
7. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):_
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):_
Current land use in the vicinity of the
Size of watershed draining to pond: Expected pond surface area:
Updated 11/1/2005
Page 9 of 13

VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact site
layouts, and explain why these design options were not feasible. Also discuss how impacts were
minimized once the desired site plan was developed. If applicable, discuss construction techniques to be
followed during construction to reduce impacts. The entire project was desired to avoid and minimize
impacts to wetlands streams and riparian buffer areas while utilizing the remaining areas outside of
these areas for development. ROADS: There is a network of roads to access the 303-acre parcel,
There are no
at
inimize stormwater run
flow
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o. enr.state.nc.us/ncwetlands/strmg~de.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
Updated 11/1/2005
Page 10 of 13

description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
Three existing culverts that currently_impact 104 linear feet of stream and were improperly
installed will be removed from within the site (see Mitigation Exhibit and Stream Forms for
day-lighted and impacted streams). Culvert 1, to be removed is in a perennial stream that
flows directly to the Neuse River. Culverts 2 and 3, to be removed are in intermittent
streams and upstream of culvert 1 along the existin f~ arm path. As well, all remaining
stream channels on-site are to be preserved with a 50' riparian buffer via Deed Restrictions,
totaling 10 031 linear feet. Removing three improperly installed culverts, in combination
with preserving the remaining streams on-site, completes the compensatory mitigation
~ackage•
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount ofNon-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ^ No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether aNEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ^ No ^
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
Updated l1/l/2005
Page 11 of 13

and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify)? Yes ® No ^
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Zone* Impact Multiplier Required
(acres) Miti ation
1 0.19 3 (2 for N/A
+ 0.03 (bioretetion) Catawba)

2 0.07
1.5
N/A
+ 0.005 (bioretention)
Total 0.295 (acre)
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260.
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from the
property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total
proposed impervious level. The entire subdivision is less than 15% impervious, with 0.75-acre to 3-
acre sin;;le-family home lots. Johnston County has abaroved the Stormwater Management Plan for
phases 1 and 2 of the Porto Fino subdivision (Approval Letters Attached .All designated drainage
runoff from the streets sheet-flow into pre-development draws. The only Qradin;; needed is for the
access roads. There is no curb and gutter along the roads within the subdivision. The only curb and
gutter will be at the entrance near the ;?ate house and horse pasture. All drainage easements will be
natural grass and forested swales. There are 3 level-spreaders in phase 1 and 2 at the end of their
respective drainage easements (S. Sanderson En ing Bering). There are also 12 level-spreader associated
with Phase 3, four at each of the stream crossings on Phase 3 to catch all run-off before it reaches the
streams (J Dalton En ing Bering). Stormwater run-off calculations are included for all three phases. All
have signed and notarized operation and maintenancel.
Updated I l/1/2005
Page 12 of 13

XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
On-site septic systems
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
Is this an after-the-fact permit application? Yes ^ No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
No, this residential community will be servicing the need for housing in northwestern Johnston
County. The proposed development is located in the vicinity of other residential housin ig n the
area. These residences are anticipated to be serviced b n~y, existing Clayton and Ralei h
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).

Appli~nt/Agent's Sign ure ~ Date
(Agent's signature is valid only fan authorization letter from the applicant is provided.)
Updated 11/1/2005
Page 13 of 13

~x.p
Design Calculations
FOR
Porto Fino Subdivision
Johnston County, North Carolina
DWQ CROSSING PERMITS
Dalton Engineering
and Associates, P. A.
D1 - 122
446 East Main Street {919j 550,4740
P.O. Box 426 Fax {919j 550,4741
Clayton, NC 27520

Project: Porto Fino Crossings
Project #: 07044
Calculated By: WJB
Date: 9/26/2007
Systems 1 - 2
Pipe Sizing: Conventional Method
n = 0.013
Storm Yr: 25 g = 232
h = 23
n 1 7 3 3h da d ri F 7 R 9 10 11 19 13 14 15 16 17 18 19
A tc I C~ Q
Time Upstrm
Adjcnt Inlet Total Inlet Pipe of Runoff Sgmnt Upper Lower Top
Type From To Areas Pipes Area Area Time Time Conc Intnsty Coeff Dschrg Slope Dm0° Size V~~„ Length Time Invert Invert Elev
Inlets acres acres min min min in/hr cfs % inches inches fUsec ft min ft ft ft
Cell 1
FES 1 2 1 0 4.01 4.01 5.0 0.0 5.0 8.3 0.45 15.0 0.50 23.4 24 5.1 98 0.3 230.30 229.81 FES
I 2 3 1-2 1 0.00 4.01 5.0 0.3 5.3 8.2 0.45 14.8 14.00 12.5 24 26.9 85 0.1 229.81 217.91 233.00
I 3 4 1-3 1 0.00 4.01 5.0 0.4 5.4 8.2 0.45 14.8 1.00 20.4 24 7.2 30 0.1 214.30 214.00 222.00
Weir:
Length= 5 feet Depth= 0.95 feet or 11.4 inches
Q=CLH3~2 where;C=3.2;L=5;H=0.95'
Q= 14.8 A= 4.75
Cell 2
Outlet Velocity Check: V = 1.91 ft/sec
FES 1 2 1 0 0.57 0.57 5.0 0.0 5.0 8.3 0.45 2.1 0.50 11.2 18 4.2 50 0.2 231.90 231.65 FES
I 2 3 1-2 1 0.00 0.57 5.0 0.2 5.2 8.2 0.45 2.1 16.00 5.9 18 23.7 55 0.0 231.65 222.85 235.00
I 3 4 1-3 1 0.00 0.57 5.0 0.2 5.2 8.2 0.45 2.1 1.00 9.8 18 5.9 12 0.0 218.30 218.18 226.00
Weir: Outlet Velocity Check: V = 2.55 ft/sec
Length= 4 feet Depth= 0.3 feet or 3.6 inches
Q=CLH3f2 where; C=3.2; L=4; H=0.3'
Q= 2.1 A= 1.2

Project: Porto Fino Crossings
Project #: 07044
Calculated By: WJB
Date: 9/26/2007
Systems 3-4
Pipe Sizing: Conventional Method
n = 0.013
Storm Yr: 25 g = 232
h = 23
0 1 2 3 3b 4a 4 5 6 7 R Q 1n 11 ~~ ~a 1d ~F ~a ~~ ~u ~o
A 4 I C~ Q - - -
Time Upstrm
Adjcnt Inlet Total Inlet Pipe of Runoff Sgmnt Upper Lower Top
Type From To Areas Pipes Area Area Time Time Conc Intnsty Coeff Dschrg Slope Dw,o Size Vwii Length Time Invert Invert Elev
Inlets acres acres min min min in/hr cfs % inches inches ft/sec ft min ft ft ft
Ce// 3
FES 1 2 1 0 0.74 0.74 5.0 0.0 5.0 8.3 0.45 2.8 0.50 12.4 18 4.2 8 0.0 221.12 221.08 FES
I 2 3 1-2 1 0.00 0.74 5.0 0.0 5.0 8.3 0.45 2.8 12.00 6.8 18 20.6 82 0.1 221.08 211.24 228.00
I 3 4 1-3 1 0.00 0.74 5.0 0.1 5.1 8.3 0.45 2.7 0.85 11.2 18 5.5 18 0.1 209.30 209.15 216.00
Weir:
Length= 4 feet Depth= 0.35 feet or 4.25 inches
Q=CLH3~2 where;C=3.2;L=4;H=0.35'
Q= 2.7 A= 1.42
Cell 4
Outlet Velocity Check: V = 2.35 ft/sec
FES 1 2 1 0 0.59 0.59 5.0 0.0 5.0 8.3 0.45 2.2 0.50 11.4 18 4.2 24 0.1 221.82 221.50 FES
I 2 3 1-2 1 0.00 0.59 5.0 0.1 5.1 8.3 0.45 2.2 18.00 5.8 18 25.2 50 0.0 221.50 212.50 225.00
I 3 4 1-3 1 0.00 0.59 5.0 0.1 5.1 8.2 0.45 2.2 1.10 9.8 18 6.2 18 0.0 209.30 209.10 216.00
Weir: Outlet Veloclty Check: V = 2.67 ft/sec
Length= 4 feet Depth= 0.31 feet or 3.71 inches
Q=CLH3~2 where; C=3.2;L=4;H=0.31'
Q= 2.2 A= 1.24

Project:. Porto Fino Crossings
Project #: 07044
Calculated By: WJB
Date: 9/26/2007
Systems 5-6
Pipe Sizing: Conventional Method
n = 0.013
Storm Yr: 25 g = 232
h = 23
0 1 7 3 3h da d 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
A tc I C~ Q
Time Upstrm
Adjcnt Inlet Total Inlet Pipe of Runoff Sgmnt Upper Lower Top
Type From To Areas Pipes Area Area Time Time Conc Intnsty Coeff Dschrg Slope D~,„ Size Vf~„ Length Time Invert . Invert Elev
Inlets acres acres min min min in/hr cfs % inches inches ft/sec ft min ft ft ft
Call 5
FES 1 2 1 0 0.95 0.95 5.0 0.0 5.0 8.3 0.45 3.5 1.50 11.1 18 7.3 28 0.1 212.70 212.28 FES
I 2 3 1-2 1 0.00 0.95 5.0 0.1 5.1 8.3 0.45 3.5 32.00 6.2 18 33.6 52 0.0 212.28 195.64 217.00
1 3 4 1-3 1 0.00 0.95 5.0 0.1 5.1 8.3 0.45 3:5 0.90 12.2 18 5.6 18 0.1 193.10 192.94 199.00
We%%
Length= , 4 feet Depth= 0.42 feet or 5.06 inches
Q=CLH3'2 where;C=3.2;L=4;H=0.42'
Q= 3.5 A= 1.69
Cell 6
Outlet Velocity Check: V = 2.42 ft/sec
FES 1 2 1 0 1.08 1.08 5.0 0.0 5.0 8.3 0.45 4.0 3.00 10.2 18 10.3 15 0.0 211.70 211.25 FES
I 2 3 1-2 1 0.00 1.08 5.0 0.0 5.0 8.3 0.45 4.0 36.00 6.4 18 35.6 46 0.0 210.50 193.94 215.00
I 3 4 1-3 1 0.00 1.08 5.0 0.0 5.0 8.3 0.45 4.0 0.80 13.1 18 5.3 12 0.0 190.30 190.20 197.00
We/r: Outlet Velocity Check: V = 2.28 ft/sec
Length= 4 feet Depth= 0.46 feet or 5.53 inches
Q=CLH3'2 where; C=3.2; L=4; H=0.46'
Q= 4.0 A= 1.84

Dalton Engineering ,.,'~
and Associates, PA.
446 East Maln Street
Post Office Box 426
Clayton, NC 27528
[phone]
Fax [phone]
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and Associates, PA.
446 East Main Street
Post Office Box 426
Clayton, NC 27528
[phone]
Fax [phone]
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446 East Maln Street
Post Office Box 426
Clayton, NC 27528
[phone]
Fax [phone]
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. ~:acp o 1- ~ 5 2 2.
Sanderson Engineering, inc.
25 C North Main Street
Post Office Box 2016
Wendell, North Carolina 27591
Phone [phone]
Fax [phone]
Email: [e-mail]
TO: Kevin Yates
John R. McAdams Company
Durham, NC 27713
We are sending you: ®Attached
^Copy of Letter ^Plans
Co ies Date No. Descri tion
5 Level S reader 13, 14, 15 Plan Sheet
1 Res onse Letter to DWQ's re uest for addition information dated 9-18-2007
1 Portofino Phase 1 Stormwater Plan dated 8-14-2006
1 Portofino Phase 1 Stormwater A royal Letter dated 8-21-2006
1 Portofino Phase 1 Revised Stormwater Plan dated 9-26-06
1 Portofino Phase 1 Revised Stormwater A royal Letter dated 10-23-06
1 Portofino Phase 1 Revised Stormwater Plan dated 6-13-07
1 Portofino Phase 1 Revised Stormwater A royal Letter dated 6-18-07
1 Portofino Phase 2 Stormwater Plan dated 9-21-2006
1 Portofino Phase 2 Stormwater A royal Letter dated 10-23-2006
Tlzese are transmitted as checked below: ^For Approval ^Return ~ Corrected Prints
^For Review and Comment ®For Your Use ^Submit Copies for Distribution
^Approved as Submitted ®As Requested ^For Bids Due 20__
^Rcturned for Corrections ^Approved as Noted
REMARKS:
Please advise if you need any additional information.
;~ ,t SSE(' S 7~n7 /,(7~dtC~
~¢'s~x~ ~
---~•--'"~ ~etter of Transmittal
DATE: 9-24-07 JOB NO 05-045
ATT:
RE: Portofino 1 & 2
Johnston C
^Specifications
^Other
COPY TO: Rob Bailey, Walthom Group SIGNED: Sfeven S. Sanderson, P. E.

Sanderson Engineering, Inc.
Engineering and Land Planning
September 24, 2007
Mr. Kevin Yates
"I'he John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
Subject: Portofino Subdivision Phases 1 & 2
Dear Mr. Fates:
Per our meeting of last week, I have enclosed 5 copies of the requested plan sheet showing Level
Spreaders ] 3, 14, and 15 in Portofino Phases 1 & 2. These level spreaders were approved in
2006 by Johnston County and by NCDI~NR-DLQ. Also, below are responses to DWQ's specific
requests in their letter dated September 1$, 2007.
2g. Five copies of the requested 1:5.0 drawing showing level spreaders 13, 14 & 15 are
attached.
2h. The construction details and notes are on the plan.
3a. There is not one (1}copy of the approved Johnston County Stormwater Management
Plan for the entir4 project. Johnston County approves projects on a phase by phase basis. I have
attached copies of the approved Stormwater Management Plan Approvals for both sections along
with subsequent revisions for Phase l .
3b. Below are the written responses regarding how the stipulations in the Johnston County
Stormwater Management Approval have been or will be addressed.
Phase 1
1. Johnston County Utilities must sign off on the Final Plat before recording. Johnston
County inspected the site to see if they are satisfied with the runoff being directed
into existing channels. `T'his inspection has taken place, no changes were requested,
the Final Plat was signed by Mr. Timothy G. Broome, P. E. on August 9, 2007 and
the Final Plat was recorded on August 14, 2007.
2. This note was not required by Johnston County for recording the Final Plat. We drew
the 100 year flood plain line on the plat instead.
3. Instead of showing the information in the restrictive covenants, a note was placed on
the Final Plat stating that the impervious surface for each lot in Phase 1 cannot exceed
4492 sf.
4. The ~•estrictive covenants are not recorded yet. This note will be placed in them.
POST OFFICE ROX 2016 919-366-2016 phone.
25-C NORTH MAIN STREET 919-36b-2017 fax
WENDEl.L, NC 27591 919-422-8020 mobile
sandersonengineeringC~yahoo.com 150*26*25047 Nextei TD

Sanderson Engineering, Inc.
Engineering and Land Planning
5. The Final Plat was recorded before all of the utilities were completed. A
Performance and Indemnity Bond is in place with Johnston County to insure that all
of the stormwater facilities are constructed in accordance with the approved
stormwater management plan. The engineer's certification will be sent after the ditch
channel linings are installed. This will take place after all utilities (i.e. Progress
Energy, Embarq, NCNG, and TWC) are completed.
6. Drainage easements, riparian buffers, jurisdictional wetlands, and flood hazard areas
are on the Final Plat.
1. The additional $30 fee was paid.
2. The existing draws will be field surveyed and a drainage easement will be shown on
the Final Plat for Phase 2 when recorded.
3. Johnston County Utilities will make an inspection before the Final Plat is recorded.
4. Johnston County Utilities will make an inspection before the Final Plat is recorded.
5. `Phis note or the 100 year flood plain will be shown on the Final Plat.
6. The NCDENR-LQ Sedimentation and Erosion Control approval has been forwarded
to Johnston County Utilities.
7. The restrictive covenants will be provided when recorded.
8. This note will be included in the restrictive covenants.
9. The engineer's certification will be provided before the plat is recorded.
10. All drainage easements, riparian buffers, jurisdictional wetlands, and flood hazard
areas will be shown on the final Plat.
if I can provide any additional information, please advise.
C~~-
SSS/
cc: Rob Bailey, Walthom Group
Attachments Phase 1 stormwater Plan w/ 2 Revisions
Phase 2 stormwater Plan
POST OFFICE BOX 2016 919-3b6-2016 phone
25-C NORTH MAIN STREET 919-36b-2017 fax
WENDEI.Ew, NC 27591 919-422-8020 mobile
sandersonengineet^ingC~yahoo.com 150*26*25047 Nextel ID
Steven S. Sanderson, P. E.

DEPARTMENT OF PUBLIC UT1L1T1ES
POST OFFICE BOX 2263
August 21, 2006 SMITHFIELD, N.C. 27577
Walthom Croup [phone]
442-1/z L. Main Street
Clayton, NC 27520
Attn; Norwood `l'homlason
Re: Portofino Subdivision-Phase 1/Stormwater Management Statement and Plan
Dear NIr. Thompson:
rmwa cr anagemen an an ca cu a-ions su mute
for the proposed Portofino Subdivisio~~-Phase I. Based upon the information submitted,
the Stormwater Management Plan has been approved with the following stipulations:
1. Channel dimensions have not been provided on the plan fo;,• the proposed swale at
the end of Costa Court to the existing channel. Please provide the cha>.uiel
dimensions on the construction drawings.
2. Methods to provide sheet flow have not been provided as all concentrated runoff
is being directed into existing chazinels. if during the course of construction it is
determined that sheet flow ~~lust be provided, additional measures will be
required.
3. Please provide a note on the final Plat indicating that all. structures are to be
placed 2' above the 100-year flood plain elevation in accordance with the
Johnston County Flood Damage Prevention Ordinance.
4. Please provide a copy of the recorded restrictive covenants and a note on the final
Plat limiting the impervious area within the residential lots to 413,678 SF, to he
distributed over the 701ots proposed.
5. 1'leasc provide a copy of the recorded restrictive covenants noting who will be
responsible for maintenance of all drainage facilities located outside of the
proposed NCDOT right of way.
6. Prior to recordation of the Final Plat, please provide a stormwater certification
stating that all stornlwater facilities were constructed in accordance with the
approved Stormwater management plan.
7. Please indicate all drainage easements, riparian buffers, jurisdictional wetlands,
and flood hazard areas an the final Plat.
A copy of this letter will be forwarded to the Planning Office for their files. Tf you Dave
any questions ar aced additional information, please contact me at (9i ~) 209-$333 or by
email at .1e11nifer.willis u,~ohnstonne.com.
Very Truly Yours, ~ `
~~~
Jennifer A Willis
C: fierry Gray, Planner
Steven S. Sanderson, PL
Chandra C. Coats, PE
.,.
N~inlyd on recycled paper ~ *~

Sanderson Engineering, Inc.
Engineering and Land Planning
Aubust 14, 2006
Stormwater Plan -Revised
Subdivision Name: Portotmo Phase 1
l~ocatian: NC 42 East of Clayton
Location is no# within the k;nviroiunentaliy Sensitive Overlay l~istriet.
i)eveloper: Waltham Group
442 % 1;;ast Main Street
Consultant; Steven S. Sanderson,l'. 1.
Sanderson l:ngincering, It)c.
Post OfCce Iiox 2016
We~tdell, NC 27591
Genet•al information
"l'he total acreage of this subdivision is 303.44 acres. Phase 1 is 88.07 acres. Phase 1 is 29.0% of tJte
entire site. 7'he entrance road is 2.10 acres in area and 1800 If in length. The portion of'd~e entrance road
apportioiaed to 1'hasc; 1 is 0.61 acres and 522 If. The site is wooded a~td pasture. Wetlands anal riparian
buffers are associated with four natural drainage ways inside the property lines. Wetland and riparian
bui'fer permits from the Corp. of Lngi~)eers acid UWQ will not be rcquit•ed far Phase 1 of this project.
il)1pCl'Vi0113 A1'ea
Approximately 7,271 feet of new roadway is proposed will) a rigi~t of way width of SO', 20' of which will
be paved. No curb and gutter will be installed, Zoning for this area is AR. Lot sizes average 46,030 sf.
Average Douse size will be 3,000 sf. Based upon the Stormwater Manual, the maximum impervious area
for residential sites outside the Environmentally Sensitive Overlay District is '15%. 70 tots ar•e proposed
within this subdivision. The expected imperviousness for this development is approximately 12.45%.
T:ach lot: 3000 sf -house
1500 sf -driveway.
4,500 sf per lot
70 lots x 4500 sf = 3.15,OOU SP total i~tipcrvious area
Roadway; 155,317 sf from AutoCAD + 10,440 entrance road(522*20) = 165,757 sf
'Total 315,000 Sh + 165,757 SF = 480,757 SF or 11.04 ac total impervious area by
design.
Allowable impervious area = 88.68 ac x 15% = 13.30 ac or 579,435.12 sf. - UK
i?xistitxg Drait)abe~vays
"i'here are iou-• existing drainage areas ii) the subdivision. The only hardened drainage structures are
driveway pipes and road culverts.
Stormwater Plan - Devised
POST OFFICE BOX 2016 919-366-2016 phone
25-C NORTH MAIN STREET 919-3bb-2017 fax
WENI~ELL, NC 27591 919-422-8020 mobile
snndersonengineeringC~yahoo.com 150*26*25047 Nextel ID

Sanderson Engineering, lnc.
Engineering and land Planning
Porfoiino Phase 1
Page 2 of 2
llclwnstr•earrl :IJJd iJpstream llr•airrage Structures
"there is no downstream structure befiore entering the Meuse River. 'T'he drainage area for our properly i5
less than T % of the total drainage area and is considered insignificaJlt to the overall flow of the Meuse
T~ivci•.
No EEpstreanl strueeures exist.
Nitrogen Reduction Estimates

'
~ Area ____ v TN Export Coeif. 1'N export from use
_
i
y~e of^1_,and Cover
~
' _ (acres) (lhs/ac/yr (l.bs/Yr)
Ilight oi
Way (read TN 9.28 6.6 _
61.25 --
ex~01'[ TJ'OJlI ~II'aph T)
~
Lots (read TN export 79.40 2.42 •~---192 T S•~-~
from Gra ~Il 12) _ _ --
--.~_____ ~1,0 I A 1~ . ____~_ 8 8. G 8 ______..~ ---- 2 5 3.40 ____
The total N-loading from the. site is 253.40 / 88.68 = 2.8G ibs/ac, less than the 3,b lbs/ac limit; therefore,
no nitrogen offset payment or wateJ• duality 13M1's are required.
M~iximum :C:mpervious Surface Allowable by Percent Larrd Area
Allowable impervious area by percent = 88.68 ac x 1.S% = 13.30 ac or 579,435 sf
Allowable impervious area per lot = 579,435 sT'- 165,757 for roadway = 41.3,G78 sf.
Maximuru Allowab#e Impervious Sur#'ace = 413,G78 s#' to be disiril~uted Duet' the 70 lots and the
Open Space. Exact square footage for each lot will be tabulated on the Final flat.
`'~~r~N~~~ryrrr
~;» ~~~tiESSrpy~,~ ~•:
~ • e
sa Sf At, `~
,~ 17688 i o
z« ~ ! ~ : ~
Steven S. Sanderson, l?. >/, v*'~.^~S''~.~,~~E•~~O`~:~,
SSS/ ~1~C~i±rt~~
~t~ ~y'YER SP~``',
POST OFFICE BOX 2016 919-366-2016 phone
25-C NORTH MAIN STREET 919-366-2017 fax
WENDirLL, NC 27591 919-422-8020 mobile
sandersonengineeringC~yahao.com 150*26*25047 Nexte) Ip

~~ ~~~~~
DEPARTMENT OF PUBLIC UTfLITIES
POST OFFICE BOX 2263
SMITHFIELD, N.C. 27577
[phone]
October 23, 2006
~~althotn Group
442-'/2 E. Main Street
Clayton, NC ?7520
A.ttza: Norwood 'I~hompson
Re: Portofino Subdivisions-Please I
Revised Storzaiavater Manageme;<zt Statement and I'Ian Approval
Dear Mr. `1 hompson:
~Ve have reviewed the revised Stormwater Management Plan and calculations
submitted for the proposed Portofino Subdivision-Phase I. Based upon tlae
informatioze submitted, the revised stormwater Management Plan has been
approved with tl~e following stipulations:
l . Channel dimensions have not been provided on the plan for the proposed
swab at the end of Costa Court to the existing channel. Please provide the
channel dimensions on the cozastruciioza drawings.
2. Methods to provide sheet flow have not been provided as all concentrated
runoff is being directed into existing channels. If during the course of
construction it is determined that sheet flow must l7e provided, additional.
measures will be required.
3. Please provide a note on the rival Plat indicating tlaal all structures are to be
placed 2' above the 1.00-year flood plain elevatioza in accordance with tlae
Johnston County l;lood I}amage Prevention Ordinance.
4. Please provide a copy of the recorded restrictive covenants and a Holt; on the
1 final Plat limiting the impervious area wiilain the residential lots to 403,124
Sr, to be distributed over the 70 lots proposed.
5. Please provide a copy of the recorded restrictive covenants noting who will
be responsible for maintenance of all drainage facilities located outside of the
proposed NCDOT right of way.
6. Prior to recordation of the rival flat, please provide a storzaawater
certification slalizag that all stormwater facilities were constructed in.
accordance with the approved stormwater naazaageznent plan.
7. Please indicate all drainage easements, riparian buffers, jurisdictional
wetlands, and. flood hazard areas on the rival f lat.
Printed on recycled paper ~~

A copy of this letter will be forwarded to the Planning Office for their files. If you
have any questions or need additional information, please contact me at (919) 209-
8333 or by email at .lennifc;r.willis~~johnsto»i~c.com.
Very i'ruly Yours,
~~
.Iennifer A Willis
C: Berry Crray, I?lanner
__ Steven S Sanderson, P1~~,
Chandra C. Coats, P)

Sanderson Engineering, lnc.
Engineering and Land Planning
September 26, 2406
Stormwater Plan _ Revision -Added Traffic Circle
Subdivisiaz Naive; Portofino Phase 1
Location: NC 42 Last: of Clayton
LoLatton IS Ilot Wtthlll the 1~11V11'Ont11CI1taIIy SZ;ItSIt{Ve nV(a•1rly District.
Developer: Walthom GrotEp
442 % East Manz Street
Consultant: Steven S, Sanderson, P. I;.
Sanderson L;ngitzeering, lnc.
Post Off ice 13ox 2016
1~/endcll, NC 27S91
Ce~tet•al Xttforntatiott
The total acreage of this subdivision is 303.44 acres. Phase I is b~.U7 acres. Phase 1 is 29.U% of the
entire site. The entrance road is 2.1.0 acres in area and 1800 If in length. The portion of the entrance road
apportioned to Phase 1 is 0.61 acres and 522 If. The site is wooded and pasture. Wctiands and riparian
buffers are associated with four natural drainage ways inside the property litics. Wetland and riparian
buffer permits front the Corp, of Engineers and DWQ will not be reyuired for Phase; 1 of t:lzis project.
Xinpervious Area
Approximately 7,271 feet of new roadway is proposed with a right of way width of SU', 20' of which will
be paved. Curb and gutter will be installed at the traffic circle only. Zoning for this area is AR. Lot sires
avea•age 46,030 sf. Average house sixc will be 3,000 sf. Based upon the Stormwa.ter Manual, the
nzaximutzz impervious area for residential sites outside the Environmentally Sensitive Overlay District is
15%. 70 lots arc; proposed witlzi~z this subdivision. The expected imperviousness for this development is
approximately 12.72%.
Each lot: 3000 sf -house
1.500 sf -driveway.
4,500 sf per lot
70 lots x 4500 sf = 315,000 Sr total impervious area
Roadway: 165,$71 sf from Aut:oCAD -t- 10,440 entrance road (522*20) = 17fi,311 sf
Total 315,000 SI' + 176,311 Sf; = 419,311. SI' or 1 1.28 ac total impervious area by
design.
Allowable impervious area = bb.6b ac x 1S% = ] 3.30 ac or .579,435.12 sf. - O1C
1~.xistirtg 1Jraiuagervays
"There are four existing drainage areas in the subdivision. 1'he only hardened drainage structures are
driveway pipes and road culverts.
POST OFFICE BOX 201b 919-366-2016 phone
25-C NORTH MAIN STREET 919-3b6-217 fax
W~NOELL, NC 27591 919-422-8020 mobile
sandersonengineeringC~yahoo.com 150*26*25047 Nextel ID

Sanderson Engineering, Inc.
Englneerulg and Land Planning
Stormwater Pian -Revision -Added 'T'raffic Circle
Portofino T'liase 1
Page 2 of 2
;uowli;stream and Upstream Drainage Structures
There is ua downstream structure bet.'ore entering the Neuse River. 'T'he drainage area i'or our property is
leas than 1 % of the iota( drainage al'efl alld IS CU]]Sldel'ed insignificant to (tic overall flow of the Neuse
giver,
No upstl•eam structures exist.
Nitrogen Reduction Estimates
--
_ "Fype of Land Cover
Iti
itt uf'Wa
d 1'N ~ Area ^^
~ (acres) ~
T '1'N Export C:oeff.
_ lbs/ac/ r T.N exhort .from use

-_
--
g
y (rea
_P.aporl tI=0111 ~i2'~i)tl 1~..__ 8.97

--- 6.6 --
59.20
Lots (r
d "T'N --~ ~ -
ea
export 79.71 ?.42 192.)0

'l'he total N-loading from the; site is 22.10 / 88.68 = 2.84 lbs/ac, less than the 3.6 Ibs/ac limit; therefore,
no nitrogen offset payment or water quality T3MPs are required.
Nlaxintum ItnC}envious Suc•face Allowable by I erce~-t Laud Area
Allowable impervious area by percent •- 88.68 ac x I S% - 13.30 ac or 579,43 sP
Allowable impervious area per tot = 579,435 si'- 176,311 for roadway -= 40;,].24 sf:
Maximum Allowable Impervious Surface = 403,124 sf to be distributed over the 7U lots and tl~e
()pen Space. )Exact square footage f'ot• each lot will be tabulated on the 1+'inal flat.
Curdlalty yours,
/J
G ~ L ~ Lam`..,
Steven S. Sanderson, P. C.
SSS/
t
. ~y _
,~~ •~H caRa~ -.
•.
a ... ~N .
~1
~~~ 17fi88 so
~:
cr' : Fjy ~ ,r'~
'• S' ' •~......•~ p .
,~~~~~~~Yi~ ~i ~S~~ +~~~,
~~1°
POST OFFICE 130X 201 b
25-C NORTH MAIN STREET
WENDELL, NC 27591
sandersonengineeringC~yahoo.com
919-3bb-201b phone
919-366-2017 fax
919-422-8020 mobile
250*26*25047 Nextel ID

DEPARTMENT OF PUBLIC UTILITIES
POST OFFICE BOX 2263
SMITHFIELD, N.C. 27577
[phone]
June 18, 2007
Mr. Norwood "1'houlpsoll
tiValthom Group
=142-''/z 1;. Main Sh•ee1.
Clavtoll, NC 27520
Re: Portofino Subdivision Phase I
Revised Storn-~vater Nlanagerneltt Siatemejl! and flan Appa'oval
Dear Mr, `Thompson:
~Vc have reviewed the revised (divided median from the U•affic circle into Please I) stormwater
management plan and calculations submitted for the proposed Portofino Subdivision Phase I,
I3aSed Llpoll t11C l11fOr111atlOn Sllb]nltCed, t11C I•eViSed StormWatel" 1nallagCment 111$1111aS beell
approved With the following stipulations:
1. Methods to provide sheet flow have not been provided as all concentrated runoff is being
directed into existing channels, if during the course of construction it is determined that
sheet flow must be provided, additional measures will be required.
2. Please provide a note on d1e final Plat indicating that all structures are to be placed 2'
above the 1{)0-year flood plain elevation in accordance with the Johnston County T'lood
I~anlai;e; I'revenfiian Ordinance.
3. Please provide a copy of the recorded restrictive covenants and a note on the hinal Plat
limiting the impervious area within tl'e residential lots to 37$,997 SP, to be distributed
over the 70 lots proposed.
4. Please provide a copy of tlje recorded restrictive covenants noting who will be
responsible for nlainl:enance of all drainage facilities located outside of the proposed
NCDUT right of way.
5. Prior to recol•dation of the final Plat, please provide a. stormmvater certification stating t11at
all stormwater facilities were constructed in accordance with the approved stormwater
tanagement plan.
6, Please; indicate all drainage easements, riparian buffers, jurisdictional wetlands, and 17ood
hacard areas on the; Final Plat.
A copy of this letfier will be forwarded to fhe Planning Office for their files. 7f you have any
questions or' 11Ced addltlollal iilfol'Inat1017, please contact me at [phone] or by email at
chailcfra,~colts(n7~ohnstonnc.cc~m.
Sincerely,
C~,.~ C. c
Chandra C. Coats, PE
Utilities and l.nvironmental Engineer
cc: Berry Gray, Planner
Steven S. Sandet'SOII, 1'13
Printed On rocvclrtd nsnnr ~ 1

Sanderson Engineerin ,Inc.
Engineering and Land Planning
June i 3, 2007
Stormwater plan -Revision -Added Divided Median for Guard House
Subdivision Nance: 1.'ortofino Phase 1
Location; NC 42 Last of Clayton
Location is yxot within the Environmentally Sensitive Overlay District.
Developer: Waltham Group
442 '~ Last Ivlain Street
Consultant: Steven S. Sanderson, 1'. L.
Sa,~dersan );ugineering, Tne.
Post Office Box 201.6
Wendell, NC 27591
General 1`nformation
The total acreage of ibis subdivision is 303.44 acres. Phase 1 is 88.07 acres. Phase l is 29.0% of the
entire site. The entrance road is 2.10 acres in area and 1800 if in length, The portion of the entra~tce i•oad
apportioned to Phase 1 is 0.61 acres and 522 if T'he site is wooded and pasture. Wetlands a~td ripari~ui
buffers are associated with four natural drainage ways inside the property lines. Wetland and riparian
buffer permits front the Corp. of Engineers and DWQ will not be required for Phase 1 of this project.
lmpei•vious Area
Approximately 7,271 feet of new roadway is proposed with a right of way width of SO', 20' of which will
be paved, Curb and gutter will be installed at the traffic circle and along Paraggi Court to create a divided
medi~u~ streetscape- Zoning for Chic area is AR. Lot sizes average 46,030 sf- Average house size will be
3,000 sf. Based upon the Sto-•mwater Manua[, the maximum impervious area for residential sites outside
the Invironmentally Sensitive Overlay District is }.5%. 7U lots are proposed within this subdivision. The
expected imperviousness for this development is approximately 13.45%.
Each tot: 3000 sf -hawse
1500 sf -driveway.
4,500 sf per lot
70 lots x 4500 sf = 315,000 SF Cota1 impervious area
Roadway: 189,998 sf from AntoCAD + 10,440 entrance road (522*20) = 200,438 sf
Total 3l 5,000 ST~ + 200,438 Sl< = 515,438 SF or 11.83 ac total impervious area vy
design,
~111owable impervious area = 88.6$ ac x 15% = 13.30 ac or 579,435.12 sf, - OK
l.:xisCi~ig Drainage~vays
'T'here are four existing drainage areas in the subdivision. 'f he only hardened drainage structures are the
traffic circle, divided entrance, driveway pipes and road culverts.
POST OFFICE BOX 2016 919-366-201b phone
25-C NORTH MAIN STREET 919-366-2017 fax
WENDELL, NC 27591 919-422-8020 mobile
sandersonengineering~yahoo.com 150*26w25047 Nexte{ TD

Sanderson Engineering, Inc.
Engineering and hand Planning
Sto{•mwater flan - lZ.evision -- Added Divided Median for Guard !-louse
Porto~liito Phase 1
Page 2 0l~ 2
lloFV~~istream and Upstream 1)raluage Structures
'There is no downstream structure. before entering the Neusc River. The drainage area for our property is
less than 1 % oi'the total drainage area and is considered insignificant to the overall l ow of the Neuse
„:.,....
No upsu•eam structures exist,
Nitrogen Reduction Estimates

`
' Area TN .Export Coeff'. `1fiI export from use
T
ype; of Land Cover _ _ (acres}
_ (lhs/ac/ r) ((bs/ r)
Ril;lit of Way (react '1'N 10.38 8,0 83
04
export from C'71•al)1] 1}~ .
Lots (read '1'N export 78.30 2.5 195
75
from Gra3~h 2) _ .
__T `T'OTAL 88.68_ ---- 278.79
1'he total N-loading from the site is 278.79 / 88.68 = 3.14 1bs/ac, less than the 3.6 lbs/ac limit; t:herefa•e;,
no nitrageia offset payment or water quality 13NI1's are required.
Maximum Yu1pLrvioiYS Surface Allowable by Percent l.aitd Area
Allowable impervious ~•ca by percent = 88.68 ac x 15% = 13.30 ac or 579,435 sf
Allowable impervious area per lot = 579,435 sf- 200,438 for roadway = 378,997 sf.
i'VJaximum Allo•~vable Iit~pervious Surface = 378,997 sf to be distributed over the 70 lots and the
Upen Space. Exact square footabe for each lot will be tabulated on the Final flat.
Cordially yours,
I ~~ /
/~
Sievers S. Sanderson, P. L.
sss/
e~dtiytia~~ia~~~~,
,db [ ,~~
e OA,`~ C~r1tlC °°~
4
~ ~.N oos. V ~~.9
[', 'i' v
•Y ~ ` 69
Y V ~ : '~~ '; ~~
+l ~,~
i, \
''%,q~'Y ER 5~,~~°°
Y~~' 4iarl~ti~~
~- ~ ~~ ~~~
POST OFFTCE BOX 2016
25-C NORTH MATN STREET
WENDEl.L, NC 27591
919-366-2016 phone
919-366-2017 fax
eta A'~7 o/17n ..__~:~_

DEPARTMENT OF PUBLIC UTILITIES
POST OFFICE BOX 22G3
SMITHFIELD, N.C. 27577
[phone]
October 23, 2006
Walthom Group
442-%2 ). Main Street
Clayton, NC 27520
Attn: Norwood 'Thompson
Re: Portofino Subdivision-Phase II
Storn-zwater Management Statement and Pla„
Dear Mr. Thompson;
We have reviewed the Stormwater Management Plazz and calculations submitted for
the proposed Portofino Subdivision-Phase II. Based upon the information
submitted, the Stormwater Management Plan has been approved with the following
stipulations:
1. The Stormwater Management Plan review fee did not include the additional
area of the entrance road to be included for this Phase. Please pravide an
additional $30.OU review fee.
2. The following drainage easements do not match the existing draws as shown
in the contazzr information: between -Lots 79-85, lots 87-93, Lots 137 & 136
and behind Lots 124 &125.- The existing draws must be field surveyed to
confirm their location and the locations of the requiz•cd Drainage Easements
prior to recordation of the Tina] Plat.
3. Additional mezzns to prevent adverse impacts iiom cross lot runoff may be
required along, the front portions of Lois 138-143. Prior to recordation of the
Final flat, an inspection will be made to determine if additional swales and
drainage eascmerits will be required.
4. Methods to provide sheet flow have not been provided as significant portions
of concentrated runoff are beizzg directed into existing channels. If during
the course of constz•uction it is determined that sheet flow must be provided,
additional measures will be required.
S. Please provide a note on the Final Plat indicating that all structures are to be
placed 2' above the 100-year flood plain elevation in accordance with the
Johnston County Fload Damage Prevention Uz'diilance.
6. Please provide our office a copy of the approval letter from NCDLNR Land
Quality for the Sedimentation and 1/rosion Control flan.
7. Please pz•ovide a copy of the recorded restrictive covenants azad a note on the
Fizzal Plat limiting the impervious area within the z•esidential lots to 470,141
SF, to be distributed aver the 741ots proposed.
8. Please provide a copy of the recorded restrictive covenants noting who will
be responsible for maintenance of all drainage facilities located outside of the
proposed NCDOT right of way.
Printed on recycled paper p ~
•M

9. Prior to recordation of the final Plat, please provide a stormwater
certification stating that all stormwater facilities were constructed in
accordance with. the approved stormwater management plan.
10. Please indicate all drainage easements, riparian buffers, jurisdictional
wetlands, and flood hazard areas on the rival Plat.
Please be reminded that no land disturbi~zg activities may begin on this site until all
other necessary approvals are obtained (e.g. Land Quality). A copy of this letter
will be forwarded to the Planning Office for their files. If you have any questions or
need additional information, please contact me at [phone] or by email at
1et~n.iier.willis(cr)johnstonne.eom.
Very Truly Yours
C/_
Jennifer A Willis
C: Berry Gray, Planner
Steven S. Sanderson, P1/
Chandra C. Coats, P~

Sanderson Engineering, Inc.
Engineering and Land Planning
September 2 ] , 2006
Stormwater Plan
Subdivision Name: Portofino Phase 2
Location: NC 42 East of Clayton
Location is tot within the Environmentally Sensitive Overlay District.
Developer: Walthom Group
442 %2 East Main Street
Consultant: Steven S. Sanderson, P, E.
Sanderson Engineering, Inc.
Post OfBcc; Box 2016
Wendell, NC 27591
General lnfoa•ntatioiz
The total acreage of this subdivision is 303.44 acres. Phase 2 is 94.78 acres. Phase 2 is 31.2% of the
entire site. The entrance toad is 2.10 acres i~t area and 1804 if in length. The portion of the entrance road
apportioned to Phase 2 is 0.66 acres and 5621f. "1'Ite site is wooded. Wetlands and riparian. buffers are
associated with four natural drainage ways inside the property lines. Wetland and riparian buffer permits
from the Carp. of Engineers and DWQ will not be required for Phase 2 of this project.
Intpervrous Area
Approximately 5,276 feet of new roadway is proposed with a right of way width of 50', 20' of which will
be paved. Curb and gutter will be installed at the Round-about. Zoning for this area is AR. Lot sizes
average 46,030 s£ Average house size will be 3,000 sf. Based upon the Stormwater Manual, the
maximum impervious area for residential sites outside the Environmentally Sensitive Overlay District is
15%. 74 lots are proposed within this subdivision. The expected imperviousness for this development is
appi•oximatcly l 1.67%.
Each lot: 3000 sf -house
1.500 sf -driveway.
4,500 sf per lot
74 lots x 4500 sf = 333,000 SI~ total impervious area
Roadway:. 142,224 sf from AutoCAD + 11,240 entrance road (562*20) = 1.53,464 sf
Total 333,000 SI~ + 153,464 SF = 486,464 SF or l 1.17 ae total impervious area vy
design.
Allowable impervious area = 95.44 ac x I S% = 14.32 ac or 623,605 sf. - OK
)Jxistittg Draiuage~vays
There are four existing drainage areas in the subdivision. The only hardened drainage structures ace the
curb and gutter and storm drainage at the round about, driveway pipes and road culverts.
P05T OFFICE BOX 2016 919-36b-ZOlb phone
25-C NORTH MAIN STREET 919-36b-2017 fax
WEN1~ELi~, NC 27'591 919-422-8020 mobile
sandersonengineeringC~yahoo.com 150*2b*25047 Nextel ID

Sanderson Engineering, Inc.
Engineering and Land Planning
Stormwater Plan
Pa-tofino Phase 2
Page 2 of 2
T)owr>.stream and Upstream llrainage Structures
"there is no downstream structure before entering the Neuse River. The drainage area for our property is
less than 1 % of the total d-•ainage area and is considered insig-~ificant to the overall flow of the Neuse
River.
No upstrea-u structures exist.
Nitrogen Reduction Estimates
Area TN Export Coeff. TN export from use
Type of Land Cover
' (acres) {Ibs/ac/yr) (lbs/yr)
Right of ~4'ay (read
1'N 7.87 6.6 51.94
c;x ort from Gra h 1 }
Lots (read ']'N export 87.57 1.9 166.38
from Gra ~h 2)
`I~OTAI, 95.44 ---- 218.32
The total N-loading from the site is 218.32 / 95.44 = 2.29 lbs/ac, less than the 3.6 ]bs/ac limit; therefot•e,
no nitrogen offset payment or water duality }3M1's are required.
Maximum Impervious Surface Allowable by Percent Land Area
Allowable impervious area by percent = 95.44 ac x 1 S% = 14.32 ac or 623,605 sf
Allowable impervious area per lot = 623,605 sf - 153,464 for roadway = 470,141 sf,
Maximum Allowable Impervious Surface = 470,1.41 sf to be distributed over the 741ots and the
Open Space. Exact square footage for each lot will be tabulated on the Final Plat.
Cordially yours,
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St ven S. Sanderson, P. E.
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POST OFFICE 8OX 201 b
25-C NORTH MAIN STREET
WENDELL, NC 27591
sandersonengineeringC~yahoo.com
919-366-2016 phone
919-366-2017 fax
919-422-8020 mobile
150*26*25047 Nextel ID

~x.p o~ - 1522
PORTO FINO
Clayton, NORTH CAROLINA
BIORETENTIONAREAS # 1-6
OPERATIONAND MAINTENANCE
AGREEMENT
WLT-07010
October 2007

BIO-RETENTION AREA OPERATION & MAINTENANCE AGREEMENT
I. MAINTENANCE OF BIORETENTIONAREA EMBANKMENTS
A. Vegetation
The primary vegetative ground cover for all berm/embankments is to be tall
fescue. Proper maintenance of this cover will serve to prevent erosion while
providing optimal access for inspection as well as preventing excessive sediment
from entering the facility. Fertilization of this vegetation should be performed
bi-annually in October and April. Woody vegetation and trees should not be
allowed to propagate on the dam embankments or top of dam. Trees and brush,
i esire ,are accepta eon ioretention area em ents of er than the dam.
Inspection of embankment vegetation condition should be performed monthly or
after every major rainfall event.
Seeding: Seeding should be accomplished by the use of a Spiker and
large tractor aerifier to ensure proper seed and soil contact along the top
of banks. Reseeding may be necessary in instances where initial seeding
failed or existing areas have been compromised. The seeding schedules
included in this report should be followed for any necessary reseeding.
2. Mowing: All vegetative cover should be maintained below 8" in height.
Due to the slope of the embankments, string trimmers (no mechanical
mowers) must be utilized for mowing turf. Mowing and maintenance
should be performed once a month to keep the maximum grass height
below 8 inches and to maintain appropriate turf cover and health of turf.
B. Erosion
Erosion is initiated when soil cover is insufficient and/or concentration of runoff
destabilizes vegetation. Runoff then tends to concentrate into channel flow, and
soils tend to become entrained in the water and be transported downstream.
Unsuitable fill material, inadequate compaction, and/or poor stabilization of
vegetation can accelerate the erosion process. This has a negative environmental
impact on downstream features, and has the potential to undermine the stability
of the bioretention facilities. Erosion can be minimized with the proper care of
vegetation and the use of appropriate methods to repair eroded areas and prevent
recurrences of eroded areas. Appropriately compacted soil meeting the berm
design requirements will be placed in any gullies or rills, and then reseeded as
described above. Re-occurrence of erosive problems should be addressed with
appropriate geotextile fabrics that are installed according to manufacturers
instructions and per an engineer's recommendation. Uneven surfaces on the
crest of the berm may lead to the formation of rills and/or gullies. It is possible
to eliminate this problem by properly filling any depressed areas such that the
entire top of berm is flat and level. Addition of fill to the top of berm should be
completed by first preparing the existing soil such that a distinct boundary layer
does not form beneath existing soil and newly placed soil. New fill should meet
all soil requirements (as to material, placement, and compaction) as stated on the
original design documents for this structure. Inspection for erosion should be
performed monthly or after every major rainfall event.

1. Abutment (or toe) areas: The location where the fill of the berm
contacts the existing ground is the abutment (or toe). Erosive channels
have a tendency to form in these areas. Appropriate geotextile fabrics,
as mentioned above, may be necessary to prevent or stop this form of
erosion from occurring. An engineer is required if erosion in this area is
significant.
C. Seepage
1. Detection: Soft wet areas and flowing springs are an indication of
seepage. Early indicators of seepage include vegetation which is more
robust than surrounding vegetation. Vegetation normally associated
with wPtlanrl arPac cn~h ac catta;lc fPrncrreeds and messes ma; also
indicate the initiation of seepage. The previously described abutment (or
toe) area is a common location for seepage to occur. Another common
location for seepage problems is the area where the outlet structure exits
the berm section. This is especially true in cases where the soil around
the barrel is not compacted properly. Another problem related to
seepage may be indicated by the occurrence of `boils' below the
abutment of the dam. These boils are springs that tend to deposit soils.
Locating the occurrence of any boils should be included in the bi-annual
inspection of the facility. `Boils' are a possible indication of piping and
could lead to berm failure. Piping occurs when a void space is formed
within the interior of the berm embankment. These void spaces tend to
be preferred paths for water to travel, which will erode the interior of the
berm and lead to failure.
D. Cracks, Slides, Sloughing and Settlement
Cracks: Large, well-defined cracks of greater than 1/a" width indicate the
potential for serious problems and the inspector of the facility should be
alert for the their presence. Cracks in the berm generally follow one of
two patterns:
• Transverse cracks appear perpendicular to the length of the berm and
may be caused by differential settlement. Transverse cracks increase
the likelihood of the formation of piping and seepage.
Longitudinal cracks appear horizontally along the berm and could
serve as warnings to a future slide event. Longitudinal cracks in
newly constructed berms may be an indication of poor compaction
techniques and poor foundation preparation.
2. Slides: Slides and slumps have the potential to critically undermine the
integrity of the berm. Arch-shaped cracks that expose soil indicate the
initiation of slides. Detection of slides by inspectors should be
addressed in a timely manner and a geotechnical engineer should be
contacted for consultation.

Settlement: Settlement of the soil in the berm reduces freeboard in large
storm events and may even lead to overtopping. Differential settlement
of the berm can also lead to the concentration of runoff and therefore
erosion as mentioned above. For this reason the berm should be
maintained uniformly to its original design elevation. Greater than six
inches of settlement may be indicative of significant issues within the
berm foundation and could lead to catastrophic failure. Indications of
this degree of settlement necessitate inspection by a geotechnical
engineer.
4. Inspections for cracks, slides, sloughing, and settlement should
performed biannually. Actions to take if any of the above is detected:
An«_~~Tnf thp~rnhlamc mrntinnarl ahoVg re~l~}re that a~eOtechn}cal gr
civil engineer be contacted, and that corrective action be taken.
E. Rodent Control
Certain rodents including muskrats, groundhogs and beavers tend to favor
man-made earthen embankments as burrows. Evidence of the presence of
such burrows requires the removal of the rodent and repair of any damage
created by the presence of the rodent.
77. SEDIMENT MONITORING
A. Bioretention Area
Accumulation of sediment within the bioretention area should be kept to a
minimum by stabilization of the bioretention drainage area and proper
prevention of erosion. Excess sediment accumulation within the bioretention
area will cause suffocation of the vegetation, thus crippling the water quality
functions of the bioretention area. Inspection for sediment deposition should be
performed biannually.
1. Check the depth at various points within the bioretention area, especially
in the upland areas around the inlet to the bioretention area.
Accumulated sediment will be removed semiannually or when the depth
reaches 1 inch or more.
2. Removed sediment shall be disposed of in an appropriate manner and
shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near the pond or streams).
B. Principal Spillway Systems
1. Remove accumulated sediment from the bottoms of the outlet structures.
The principal spillway systems should be inspected for sediment
accumulation monthly or after every major rainfall event.
C. Storm Drainage System
1. The upstream storm drainage system should be maintained along with
the bioretention area. Trash from the site has a tendency to be washed
into the storm drainage system and become lodged in the catch basins or

pipes. The catch basins and pipes should be cleaned of debris at the time
that maintenance is performed on the stormwater maintenance facilities.
Sediment may accumulate in portions of the storm drainage system
where slopes are relatively flat. This sediment may be washed out of the
system, or flushed with a garden hose. Sediment should only be flushed
in this manner when it is visible in the upstream storm drainage pipes
with the frequency of flushing. varying from every six months to every
two or three years. Steps should be taken to trap this "flushed" sediment
at the forebay to the bioretention area to prevent it from being deposited
within the bioretention area.
III. MAINTENANCE OF OUTLET STRUCTURES
The bioretention area is designed to pass water quality storms through an underdrain
system and larger storm events through a principal spillway drop inlet. It is of vital
importance that these outlet structures remain unblocked so that the hydraulic
functionality of the stormwater management facilities aze not compromised. The outlet
structure systems should be inspected to ensure that they are functioning properly.
A. Bioretention Underdrain System
The underdrain system for the bioretention area consists of 8-inch
diameter perforated PVC (schedule 40) pipes. These underdrain pipes
connect to the concrete principal spillway drop inlet. Tied to the
underdrain system are vertical PVC cleanouts that extend up to the
surface of the mulch layer. The underdrain system is wrapped in a
nonwoven geotextile filter fabric and is installed within a gravel jacket
in order to minimize the probability of blockage. However, in the event
that the underdrain systems become blocked, the bioretention area will
not drain appropriately and will begin to pond up, which means that the
water quality benefits associated with the bioretention area are lost. The
underdrain system should be inspected for blockage monthly or after
each major rainfall event. If inspected after a major rainfall event, all
ponded water should dissipate over 4-6 hours. Debris causing the
blockage should be promptly removed from the underdrain system such
that sufficient infiltration through the bioretention area may .occur. The
underdrain systems may be accessed/flushed out via the PVC cleanouts
located at the top of the mulch layer.
B. Bioretention Area Principal Spillway
The principal spillway for the bioretention area consists of a 4' x 4'
concrete drop inlet attached to a 18-inch RCP barrel. On top of the drop
inlet is a metal trash rack that prevents trash from entering the barrel
system. The concrete drop inlet principal spillway is responsible for
safely conveying larger storm events through the bioretention azea. The
principal spillway system is expected to remain robust throughout the life
of the bioretention azea, but periodic inspection of this system is required.
This inspection should occur biannually. The inspector should check for
the presence of spalling, scaling, or cracking in the spillway system.
Spalling is evident when pieces of concrete fall from the main pipe. It is
defined as the breaking, chipping, or fraying of concrete slabs that leave
an uneven surface or edge, most often at joints or cracks. Scaling occurs

when the surface of the concrete begins to flake off. The presence of
cracking is indicated by separations in the concrete that are not located in
the joints. Cracking can indicate the presence of structural problems and
lead to leaks. Cracking can also cause the system to no longer be
watertight, which can lead to piping (i.e. migration of soil particles into
the pipe). If piping occurs, the risk of failure of the dam structure is
greatly increased. Evidence of any of the above issues require that an
engineer be contacted for an additional inspection to determine the need
for repairs.
2. If the principal spillway system (which includes the trash rack) becomes
blocked so that it does not operate at full capacity, the risk of dam
overtopping or other uncontrolled releases may result. Therefore, to
ensure hydraulic capacity of the spillway, the principal spillway system
(including trash rack) should be inspected for blockage monthly or after
each major rainfall event. Any vegetative growth that occurs within the
principal spillway systems should be removed promptly so that the full
hydraulic capacity of the systems is maintained.
C. Downstream Outlet Area
The downstream outlet areas should be inspected monthly for the following items:
The downstream outlet areas should be kept clear of sediment
accumulation, tree limbs, and any other debris that could potentially
cause blockage.
2. The outlet area should be inspected to ensure that positive drainage is
maintained. Any time the inspector notices that the drainage leaving the
Bioretention area or underground detention system is not flowing freely
downstream, but rather "ponding" in a sump, the appropriate steps should
be taken to reestablish positive drainage. If necessary, an engineer should
be contacted to ensure these steps are taken appropriately.
IV. MAINTENANCE OFBIORETENTIONAREA
A. Bioretention Area Vegetation
1. Once the construction of the Bioretention area is complete, the
vegetation should be watered for 14 consecutive days unless sufficient
natural rainfall in order to establish the vegetation appropriately.
2. The interior of the Bioretention area shall be planted with approved
vegetation and a mulch layer.
3. Stakes and wires for the trees within the Bioretention area may be
removed once the trees have taken root, or by 6 months, whichever is
sooner.
4. The vegetation (i.e. trees, shrubs, etc.) should be visually inspected
monthly (more frequently in the summer) for disease or pest problems.
If pest treatment is necessary, use the least toxic method. All dead and

diseased vegetation considered beyond treatment should be removed and
replaced. The vegetation should be kept healthy and vibrant.
The grass within the bioretention area should also be healthy and
vibrant. If necessary, it should be overseeded (usually in the fall -
September to October) at a rate of 100 lbs/acre.
6. The grass within the bioretention area should be mowed to a height of no
greater than 8 inches.
7. During extreme heat and drought conditions, the vegetation should be
inspected for physical features of stress (i.e. wilting, yellow, spotted,
lnec of 9r 1=jrgw~} leaves,-etC ~ ~urins~ thPCP ~nnrlitinnc ~e hinrPtPnti~n
areas should be watered as necessary.
8. Weeds and. overly aggressive vegetation should be removed whenever
present.
9. Trees within the bioretention area should be pruned annually or as often
as needed.
B. Planting Soil Layer
1. The planting soil layer should be visually inspected for erosion/damage
once a month. Evidence of erosion should be promptly repaired. If
erosion is present along the drainage path within the bioretention area, it
maybe stabilized using small stones.
2. The pH of the bioretention area should be checked twice a year. If
necessary, apply an alkaline product (such as limestone) to maintain the
appropriate pH. Please reference the detail sheet for the bioretention
area included in this report for the appropriate pH levels.
3. If present, accumulated trash, litter, and debris should be removed
during the monthly inspection.
4. If present, accumulated sediment should be removed per the "Sediment
Monitoring" section of this manual.
C. Mulch Layer
Any part of the bioretention area that is void of mulch should be re-
mulched by hand as needed.
2. Every 6 months (once in the spring and once in the fall), a fresh layer of
mulch should be added. Once every 2 to 3 years (typically m the
spring), the old mulch layer should be removed prior to applying a new
mulch layer.

I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance
procedures listed within. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name:Robert Bailey, Walthom Group.
Title:_ Project Manager
Address
Phone:
Signatur
Date: l
a Notary Public for the State of
County of J ~ h;in~k~-, , do he eby certify that K.c~~.Fit~ ~ ~~°ai
personally appeared before me this -~~ day of t~ I?,(~~e~t , ~, and acknowledge the due
execution of the forgoing storm water management facility maintenance requirements. Witness my hand and
official seal,
~~~~~~~ E M. ,~ ~'~.,~
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_ ~~YARy
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My commission expires DC~t~~ ~~, ~ Lj