SW7080810_HISTORICAL FILE_20080828

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW tgo
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
L HISTORICAL FILE
((❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
✓�1, `
YYYYMMDD

MCKIM&CREED
August 28, 2008
Samir Dumpor
NCDENR — DWQ
943 Washington Square Mall
Washington, NC 27889
ENGINEERS
SU RV EVO RS
P L A N N E R S
M&C 04135-0001 (40)
RE: River Dunes RV and Boat Storage High Density Stormwater Permit
Request for Additional Information
Dear Mr. Dumpor:
In response to your request for Additional Information dated August 21, 2008:
V 1. A signed and sealed coversheet for the Calculations package has been
included.
2. The Supplement prompts for non -SR waters throughout are now
complete, in lieu of the prompts for SR waters.
3. All Supplements have been updated to include the required 50'
vegetative filter.
/4. The Additional Drainage Area table has been revised to cite Parris Creek
U z as the Receiving stream for Drainage Area RV-1
5. The Supplement for Basin RV-4 has been updated with correct Drainage
Area and impervious area square footages.
v 6. &7. We are pleased to submit the following revised documents to reflect
the above changes for your review and approval.
Venture IV Building
• One (1) signed and sealed, and one (1) copy of the cover page for
Site 500 the Calculations package.
1 730 Vorsi,y Drive • Two (2) copies of Supplements for Infiltration Basins RV-1, RV-2,
RV-3, and RV-4.
Rolelgh, NC 27606 • Two (2) copies of the Additional Drainage Area Information
attachment to the Application.
® 919.233.8091
Fax 919.233,8031
www.mckimcreed.com

•
•
C
Mr. Samir Dumpor
August 26, 2008
Page 2 of 2
The above documents and plan sheets are to be used in conjunction with the
Calculations packages from our August 13,hsubmittal.
I trust that this information will be sufficient for your review. If you require
clarification or additional information, please do not hesitate to contact me.
Thank you.
Sincerely,
McKIM & CREED, P.A.
Curtis M. Blazier, PE
Project Manager
Enclosures
cc: Ed Mitchell, River Dunes Corporation
W<11\4&CREED

WATF90
Michael F. Easley, Governor
�QF
ti
�0
William G. Ross Jr., Secretary
rNorth
Carolina Department of Environment and Natural Resources
1
p Y
Coleen H. Sullins, Director
®
Division of Water Quality
August 21, 2008
River Dunes'Corporation
Attn.: Ed'Mitchell
416-A�Pollock Street
New Bern, NC 28560
Subject:: Stormwater Review SW7080810
River Dunes Marina and Residential
Development — RV & Boat Storage Area
Pamlico County
Dear Mr. Mitchell:
This office received a Coastal Stormwater permit application and plans for the subject project on
August 13, 2008. A preliminary review of your project indicates that before a State Stormwater permit
can be issued the following additional information is needed:
�. Please sign and seal the Calculations.
✓2. Fill out the Required and The Provided volume for non -SR waters in all Supplements.
L/3. Projects that drain to SA waters require the 50' vegetative filter. Revise all Supplements and
® / any other necessary documents to show this requirement.
4. Revise the Drainage area table of the Application to change the receiving stream for the
basin #1 to Parris Creek.
5. Revise the Supplement for basin #4 to change the drainage area and impervious area. The
drainage area table of the Application shows drainage area for basin #4 to be 56,084, while
the Supplements reads 54,099 and the drainage area table of the Application shows
/ impervious area for basin #4 to be 47.070, while the Supplements reads 45,918.
✓/ 6. Revise all necessary documents to reflect the above changes.
t/ 7. Provide 2 sets of signed and sealed plan sheets and documents.
The above requested information must be received in this office prior to August 28, 2008 or
your application will be returned as incomplete. The return of this project will necessitate resubmittal of
all required items including the application fee. If you need additional time to submit the required
information, please mail or fax your request for time extension to me at the .Letterhead address and
include the application number on the request. The request must include justification for the amount of
additional time needed. The request will only be granted for justifiable delays that are unforeseen and
beyond the owner or consultant's control.
You should also be aware that the Stormwater Rules require that the permit be issued prior to
any development activity. Construction without a permit is a violation of 15A NCAC 2H.1000 and North
Carolina General Statute 143-215.1 and may result in civil penalties of up to $25,000 per day.
North Carolina Division of Water Quality Internet www.ncwatewualitv.ore
943 Washington Square Mall Phone [phone]
Washington, NC 27889 Fax [phone]
Nne
orthCarolina
Naturally
An Equal OpportunitylAffrmafive Action Employer— 50% Recycled110% Post Consumer Paper

Please reference the Stormwater Project Number above on all correspondence. If you have
questions, please feel free to contact me at [phone]. •
Sincerely,
Samir Dumpor, PE
Environmental Engineer
Washington Regional Office
cc: Washington Regional Office
Curtis Blazier, PE, McKim & Creed, P.A. (1730 Varsity Drive, Suite 500, Raleigh, NC 27606)
•
•

- For DENR UseONLY
North Carolina Department of Environment and Reviewer: �. 06V
``
AGAFMNatural Resources Submit
NCDENR Request for Express Permit Review Time
Confirm:
FILL-IN all the information below and CHECK the Permit(s) you are requesting for express review. FAX or Email the completed form to Express
Coordinator along with a completed DETAILED narrative, site plan (PDF file) and vicinity map (same items expected in the application package
of the project location. Please include this form in the application package.
• Asheville Region -Alison Davidson 828-296-4698;alison.davidson(7a-ncmail.net
• Fayetteville or Raleigh Region -David Lee 919-791-4203; david.lee(dncmail.net
• Mooresville & -Patrick Grogan 704-663-3772 or patrick.grogan(d7ncmail.net
• Washington Region -Lyn Hardison 252.946-9215 or Ivn.hardison(.ncmail.net
• Wilmington Region -Janet Russell 910.350-2004 orjanet.russeli(@ncmail.net EXPRESS
NOTE: Project application received after 12 noon will be stamped in the following work day. LLSs[4001� Ir1l oo��mm��
Project Name: RIVER DUNES MARINA & RESIDENTIAL. RV & BOAT STOR. County: PAMLICO AUG 132008
Applicant: ED MITCHELL Company: RIVER DUNES CORPORATION NC DENR
Address: 416-A POLLOCK STREETCity: NEW BERN, State: NC Zip: 28560-
Phone: [phone] Fax::[phone] Email: [e-mail]
Physical Location:SR 1317
Project Drains into _ waters — Water classification _ (for classification see-http://h2o.enr.state.nc.us/bims/reports/reportsWB.html)
Project Located in NEUSE River Basin. Is project draining to class ORW waters? Y/N , within ''/z mile and draining to class SA waters Y or
within 1 mile and draining to class HOW waters? Y/N
Engineer/Consultant: CURTIS BLAZIER Company: MCKIM & CREED
Address: 1730 VARSITY DRIVE, SUITE 500City: RALEIGH, State: NC Zip: 27606-_
Phone: [phone] Fax::[phone] Email: [e-mail]
(Check all that apply)
❑ Scoping Meeting ONLY ❑ DWO, ❑ DCM, ❑ DLR, ❑ OTHER:
❑ Stream Origin Determination: # of stream calls = Please attach TOPO map marking the areas in questions
® State Stormwater ❑ General ❑ SFR, ❑Bkhd & Bt Rmp, ❑ Clear & Grub, ❑ Utility
❑ Low Density ❑ Low Density -Curb & Gutter _ # Curb Outlet Swales ❑ Off -site [SW _ (Provide permit #))
❑ High Density -Detention Pond _ # Treatment Systems ® High Density -Infiltration 4 #Treatment Systems
❑ High Density -Bio-Retention _ # Treatment Systems ❑ High Density—Stormwater Wetlands _ # Treatment Systems
❑ High Density -Other _# Treatment Systems /❑ MODIFICATION: ElMajor ElMinor ❑ Revision SW_
❑ Coastal Management ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
❑ Land Quality ❑ Erosion and Sedimentation Control Plan with _ acres to be disturbed.(CK # (for DENR use))
WETLANDS QUESTIONS MUST BE ADDRESSED BELOW
❑ Wetlands (401): Check all that apply
Wetlands on Site ❑ Yes ❑ No
Wetlands Delineation has been completed: ❑ Yes ❑ No
US ACOE Approval of Delineation completed: ❑ Yes ❑ No
404 Application in Process w/ US ACOE: ❑ Yes ❑ No
Permit Received from US ACOE ❑ Yes ❑ No
Fees lit for multiplepermits: ICheck# 136
Isolated wetland on Property ❑ Yes ❑ No
Buffer Impacts: ❑ No ❑ YES: _acre(s)
Minor Variance: ❑ No ❑ YES
Major General Variance ❑ No ❑ YES
401 Application required: ❑Yes ❑ No If YES, ❑ Regular
Perennial, Blue line stream, etc on site ❑ yes ❑ No
For DGNR use onh
Total Fee Amount $
SUBMITTAL DATES
I Fee
SUBMITTAL DATES
Fee
CAMA
Is
I Variance ❑ Ma'; ❑ Min
$
SW ® HD, ❑ LID, ❑ Gen
$ Q000
401:
$
LQS
$
Stream Deter,_
$
NCDENR EXPRESS July 2008

vMcKIN4&CREED
August 13, 2008
Lr i { r , I t'w� _ V�
% t 1
Mr. Scott Vinson DWO—W RO
ENGINEERS
SURVEYORS
P L A N N E R S
04135-0001 (40)
Division of Water Quality
North Carolina Department of Environmental and Natural Resources
943 Washington Square Mall
Washington, NC 27889
RE: River Dunes Marina and Residential Development, Pamlico County,
North Carolina
High Density Stormwater Permit
Dear Mr. Vinson:
On behalf of River Dunes Corporation and Ed Mitchell, please find enclosed for
your review the high density stormwater permit for the River Dunes Marina and
Residential Development located in Pamlico County, North Carolina. This
permit specifically covers the RV and Boat Storage Area.
River Dunes Corporation will be mailing separately the following items:
1) Signed permit application
2) Signed and notarized operation and maintenance agreements for the
stormwater BMPs
3) Check for $4,000 for express review permit application fee
If you have any questions or request additional information, please let me know.
Sincerely,
Venture IV Building 1&0Jl,I`
1730 Varsity Drive
Raleigh, NC 27606
919. 233. 8091
Curt Blazier, PE
McKIM & CREED, P.A.
Fox 9�?4135YoaUtQ134rmil\NC DEN ItDWQ5lurmwater\HighDensityPermitRVandBoatStorageArea\DDPermitCoverLetter_WIMS.dne
www.mckimcreed.com

v ccz �v��S _ 2� j�>0Arr S-PU-\�TE
STORMWATER SUBMITTAL REQUIREMENTS
INFILTRATI Basins and Trench SYSTEMS
Basins and Trench
I. Objective
A. V Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case maybe,
by any means including piping or swales, and direct it to the infiltration system.
B. V Check the proposed basin/ trench design to make sure it meets or exceeds the minimum
design criteria for design storm, volume and drawdown.
H. What makes up a complete infiltration basin / trench application package?
A. Wo sets of sealed, signed & dated layout & grading plans with appropriate details.
B. V'ompleted application with supplement(s), SWU-101, SW401-Infiltration Trench, SW401-
Infiltration Basin, and inspection and maintenance agreements.
�C�� eed restriction document, if applicable. (subdivisions & projects with out parcels)
D) Sealed, signed & dated calculations.
. t/A soils report containing information in regard to the soil type, boring locations, seasonal high
`� ��w��ter table elevation and expected infiltration rate.
F. r�/�hlorides test results must be provided if the project is within '/Z mile of SR waters (Phase II).
(This is only required to test out of SR water treatment requirements)
III. BIMS entry (for DWQ use only)
Enter & track application acknowledged date, review date, add info requested/received dates, permit
issue dates, and drainage area info. Best done after the add info letter is written and before sending
permit up for signature.
IV. Shell documents (for DWQ.use only)
Permit„sliells: s:\wqs\stormwater\shell\shighcomihbasin '
S:\wqs\stormwater\shells\highcomintrench
s:\wqs\stormwater\shells\h ighsu bin basin
s:\wqs\stormwater\shells\highsubintrench
Calculations: s:\wqs\stormwater\excel spreadsheets\inbasin
s:\wqs\stormwater\excel spreadsheets\intrench
l�.
V. Review Procedure- look for consistency between the various elements of the package- application,
plan and calculations. (�
A. APP ATION k�
1. riginal signatures are required. Photocopied signatures cannot be accepted.
2. A completed infiltration basin or infiltration trench supplement, one for each proposed
system. A signed, dated and notarized Inspection and Maintenance Agreement for
each proposed system with an original signature.
3. The elevations, areas and volumes reported on the supplement match up to the
�— numbers used in the calculations and shown on the plan details.
r4. Built -upon areas are reported in square feet in Section 111.6.
5. Receiving stream name and classification.
6.v'Section 111.6 is filled in -cannot be left blank. One column must be filled in for each
Aproposed infiltration basin or trench.
7. V If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State
Corporations Database. Make sure corporation is spelled correctly (capitalization and
punctuation matter) and that the person signing the application is at least a vice-
president in the corporation, a General Partner in the partnership, a member in a
member -managed LLC, or the manager of a manager -managed LLC. Need
documentation to support if the Articles of Incorporation do not list the members or
managers of the LLC. If an agent signs, then a letter of authorization is needed from the
resident, vice president, general partner, member or manager.
87ro
f subdivided projects, a signed and notarized deed restriction statement must be
vided.9.ils report with the SHWT, Soil type and expected infiltration rate. �y
I� ).r ^ �%L — /?2�/ib� f1C ��c�:hQ9r r uCRS fii�u�n

Infiltration Basin & Trench, cost.
i1
B. CALCULATIONS
1. J/The basin or trench must draw down within 5 days. Spray irrigation is not acceptable as
2VIthe sole means of drawdown.
he design storm is 1.5" if the project is subject to Phase II or is sited within %: mile of
and draining to SA waters. The design storm for projects subject to Phase II sited
within % mile of and draining to SR waters must treat the difference between the pre
rid post development conditions for the 1-yr 24-hr storm. Otherwise, use 1" design
�torm.
3. port the bottom surface area.
4. eport the surface area at the overflow elevation.
5. how the calculation for the minimum required volume.
�)6.V Provide a table of elevations, areas, incremental volumes and accumulated volumes to
demonstrate that the minimum required volume has been provided.
7. alculations are signed, sealed & dated.
S. eport the Drainage Area and Built -upon area for each basin or trench.:
9. The seasonal high water table must be at least 24" below the proposed bottom
,0Ievation of the system. For Phase II projects, at least 12" of this must be in naturally
occurring soils.
i 10. All runoff in excess of the design storm must bypass to a vegetated, filter prior to
entering the basin or trench. If the system is designed to store a larger design storm
(generally 2-3 times the minimum), the requirement for an offline bypass can be waived.
Please contact the Division to determine what design storm is appropriate for the
project.
r;, v-1ry� Sew rErdvi gi p/++%d¢d1 e �or
"A -S(Z on SApo(e«...7t-
J2.V'— — 3>rawnale
I
� i t %S S ,164?`9
()A dnan4ye arm +..Wc
iS 56 oPq
— 3UA
-- Il— 45,918
C -tt-
47;o7c
51 C�- � se'z"-
C Jc; kWC. coj� (.0~

Infiltration Basin & Trench, cont.
C.
PLANS - Plan sheets should be kept to a minimum. For small commercial single basin
projects, the plan set could consist of only 2 or 3 sheets, layout, grading and details. For
larger projects, show as much information as possible on as few sheets as possible, without
cluttering them up.
1. ✓ velopment/Project Name
2. ✓�ngineer name and firm.
✓Legend
3.
4. ✓North Arrow
5.VLocation Map with nearest intersection of two major roads shown. Major road is any 1,
2 or 3 digit NC, US or interstate highway.
6. afe- standard engineering scale, no off-the-wall stuff.
7.te
7' vision number and date, if applicable.
Ra
9. iginal contours, proposed contours, spot elevations, finished floor elevations, pipe
inverts, swale inverts, etc.
10 ✓Exi sting drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map
delineating the offsite drainage areas.
11✓ roperty/Project boundary lines, bearing &distances.
12� can High Water Line or Normal High Water Line, if applicable.
13. rainage easement locations shown on the plans along with their width.
14.VWetlands delineated, or a note on the plans that none exist. Provide a copy of the
wetlands delineation map signed by the Corps of Engineers, or have the applicant
include a copy of the unsigned delineation map submitted to the Corps. Infiltration
systems may not be located in wetlands unless a permit to fill those wetlands has been
✓obtained and the soils meet the SH and hydraulic conductivity requirements.
15. Details for the ro�, pares g, cul- -sacs, inclu�g sidewalk width i, dimeosions &
pes.
16. artment / Condo development- provide a typical building footprint with dimensions,
nd note all concrete and wood deck areas.
17. The drainage area for each basin or trench is clearly delineated and numbered to match
upvto the calculations and supplement. Drainage area delineation is best done as a
separateplan sheet.
18. A basin section detail showing bottom and storage elevations, 3:1 side slopes. The side
slopes of an infiltration basin are not restricted to vegetation. They may be hardened
,�,� with rock, timber, concrete, decorative brick, etc.
1I)ArA trench section detail with the perforated pipe diameter, filter fabric wrapped around
the pipe and around the trench, trench height and width, rock fill type.
20i1ff mg a pre-fab chamber structure, provide details of the chamber, including model #,
ngth, width, chamber volume and number of chambers being used.
21. A bypass structure detail is provided showing a trash rack with 56" square openings,
and the necessary bypass weir or pipe elevation. Several types of bypass structure
designs are acceptable.
22. Dimensions for each line and arc formed by the bottom contour of an infiltration basin.
? "
23' All runoff in excess of the design storm must pass through a vegetated filter prior to
5 �c
being discharged into the receiving stream. The filter must be 50' long for SA waters
,and 30' long for non -SA waters.
24 V All -infiltration systems must be located at least 50' from the MHW line of surface waters.
—
25.V Vegetation is specified for basin slopes not being hardened. Weeping Love Grass is not
stable as a permanent vegetated cover for side slopes.
26. All roof drainage must be directed to the system. Show the roof drain collection piping
on the plans. This is especially necessary for projects where the buildings back up the
property lines where roof drainage may leave the site prior to going through the system.
27W*onitoring wells may be required on a case -by -case basis.

�McIQM&CREED
TO: NCDENR Division of Water Quality
943 Washington Square Mall
Washington , NC 27889
ATTENTION: Scott Vinson
WE ARE SENDING: ®Originals
❑ Specifications
LETTER OF TRANSMITTAL
DATE: August 12, 2008
PROJECT NO: 04135-0001
TASK NO: 9
RE: River Dunes Development
RV and Boat Storage Area SW submittal
TRANSMITTAL NO:
PAGE 1 OF 1
® Prints
® Calculations
❑ Shop Drawings ❑ Samples
❑ Other - Check
Quantity
Drawing No.
Rev.
Description
Status
2
RV and Boat Storage Area - high density stormwater permit
F
submittal booklets, including calcs and plans
'Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See
Remarks
Action Status Code: 1. No Exceptions Taken 2. Make Corrections Noted 3. Other
4. Amend & Resubmit 5. Rejected -See Remarks
REMARKS: River Dunes Corporation will be supplying signed and notarized O&M agreements for
the BMPs, the signed permit application, and the permit fee check for $4,000. Thanks!
cc
1730 Varsity Drive, Site 500, Ralelgh. NC 27606 919/233-8091 Fax [phone]
McKIM & CREED, PA
Signed
Curt Blazier, PE

.io
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STORMWATER MANAGEMENT PERMIT
RIVER DUNES MARINA AND RESIDENTIAL DEVELOPMENT
for
RIVER DUNES CORPORATION
RV AND BOAT STORAGE AREA
TABLE OF CONTENTS
1. PERMIT APPLICATION
11. SUPPLEMENTS
III. CALCULATIONS
IV. - GEOTECHNICAL DATA
V. PLANS
�' ,a ��',

STORMWATER MANAGEMENT PERMIT APPLICATION FOR (SWU-101
• VER 03.27.08)
PART III. PROJECT INFORMATION
ITEM 1 DETAILED NARRATIVE
RIVER DUNES MARINA AND RESIDENTIAL DEVELOPMENT
for
RIVER DUNES CORPORATION
HIGH DENSITY STORMWATER MANAGEMENT PLAN
RV AND BOAT STORAGE AREA
The project site is located in Pamlico County at the confluence of Broad Creek and the
Neuse River. The 1327-acre tract, owned by River Dunes Corporation, consists
predominantly of loblolly pine stands characteristic of timber production use. Common
soil units of upland areas include Wahee fine sandy loam, Argent loam, Yonges loamy
fine sand, Fork loamy fine sand, and Altavista loamy fine sand.
The existing drainage patterns at the site form seven drainage areas which discharge to
the Tar, Broad, Paris, Mill, Cedar and Gum Thickets Creeks and the Neuse River. A
conservation easement has been placed on the area of the Gum Thicket Creek watershed.
The proposed subdivision is designed to preserve these seven existing drainage patterns
within the project area.
® The River Dunes Marina and Residential Development has been planned as an overall
low -density development in compliance with the coastal stormwater regulations. The
low density stormwater management permit SW7060204 has been approved by
NCDENR. There are several parcels, collectively described as the Harbor Village
Residential Areas, the Harbor Village Center and Riverside Village (see Sheet M-1),
which fall under the overall low -density provisions with respect to gross acreage but will
be developed at higher net densities than the remainder of the property. The developer
will employ a best management practice approach to these parcels to insure that water
quality objectives are met for the entire property. A series of shallow grassed infiltration
basins will be employed at scattered strategic locations as needed to capture and infiltrate
stormwater runoff from roadways and home sites. The use of stormwater culverts will be
limited. Home sites and roadways will be setback from wooded wetlands where feasible
to allow for a riparian buffer to dissipate sheet runoff. Other collected stormwater runoff
will be directed to adjacent upland wooded areas and discharged into these areas through
level spreader type devices in order to further assure maintenance of water quality. The
eleven areas included in this approach will be the Harbor Villages I to VI, Riverside
Village, Section 4A, the Village Center and Marina Service Area, the RV & Boat Storage
Area and the Future Commercial along Orchard Creek Rd. (see Sheet M-1).
Ll

The high density pocket of development covered in this permit application includes the
RV and Boat Storage Area, containing approximately 336,000 square feet, or 7.7 acres.
The RV and Boat Storage Area consists of four drainage areas which discharge to the
Neuse River. Four infiltration basins are proposed for stormwater management purposes
(see Sheet M-1 for master plan of development). Maximum built upon acreage for the
area is 6.05 acres. The project area consists of four storage buildings and gravel roads.
The following comments address stormwater solutions for this specific area of the River
Dunes development plan:
Four infiltration basins will be constructed around the perimeter of the boat storage area to
control stormwater runoff and discharge it to the Neuse River via wetlands to the south and
a culvert under Old Lighthouse Rd. to the north (see Sheets C1.1 and C3.1). Level
spreader overflow devices located on the berms surrounding the basins, grassed swales and cv}rw«
vegetated filter strips will be utilized to minimize impact to adjacent wetlands and ensure
state water quality standards. Stormwater runoff from the drainage areas will enter the
basins via sheet flow and subsurface piping from inlets in the drives between the storage
buildings. Grassed filter strips grassed swales, and sumps in the bottom of the inlets will
act as pretreatment for the stormwater runoff.
Soils at the locations of the BMPs will be re-evaluated prior to construction. A silty clay
layer approximately two to three feet in thickness exists at the basin location (see
geotechnical report and borings). This clay layer will be removed and replaced with
suitable sandy fill per NCDENR Stormwater BMP Manual standards (see Exhibits B and
® Q. Double -ring infiltrometer tests were run on the infiltrating soils in each basin. These
v results are shown in the table in the geotechnical data section. The average infiltration
rates for each basin were all below the minimum 0.52 inches per hour required by
NCDENR. In addition to replacing unsuitable soils in the basin areas, suitable fill will
also be placed in areas immediately around the three infiltration basins, especially in the
area between the basin and the wetlands. The extent of the fill placement will be
governed by the location of the adjacent buildings. The placement of the suitable fill will
help the stormwater to flow vertically and horizontally and prevent the formation of a
clay barrier wall around the basins.
Silt fence will be installed around the perimeter of the infiltration basins for the purpose
of temporary sedimentation control. Once the entire drainage area is stabilized, the silt
fence will be removed.
The River Dunes property will be developed in a way that should meet the Neuse River
Basinwide goal of protecting waters while accommodating economic growth.
Additional BMPs will be employed to minimize impact to sensitive groundwater
recharge areas. Measures may include conveying stormwater from roof -tops and
walkways into dry gravel wells, applying gravel under decks to stabilize non -vegetated
surfaces, locating sheds and garage structures upland from the shoreline, and surfacing
0-

parking pads with turf block or Gen mat. Grading will direct runoff toward woody
wetlands for additional filtration prior to groundwater recharge.
The marina Basin excavation will provide in excess of 500,000 cubic yards of material
for use on site as fill for road construction throughout the project and for site
development of the marina service areas (i.e. clubhouses, post office, retail, fitness and
spa, chapel, swimming pools, and village center). This fill will also be utilized to prepare
sites for developer construction clustered residential units. The excavated material
consists of sand, sandy clay and sandy loam that is generally considered suitable for both
compacted engineered fill for roadways, parking area and building pads and for un-
compacted fill for landscape and infiltration areas. ZA
v�dw�a-
The design of infiltration basins will be in general accordance with NCDENR guidelines
and will include suitable volume to contain runoff from a three (3) inch storm. Basins
RV-3 and RV-4 will contain suitable volume to contain runoff from the 1.5 inch storm.
A bypass will be provided for larger storms at these basins. An overflow "spillway" will
be installed to allow excess water to be quickly removed from the infiltration basins
during periods of rainfall in excess of the design storm. Vegetation within the infiltration
basins will be as recommended by the NCSU Extension Service.
Again, it is the intent of River Dunes Corporation to develop River Dunes in a way that
should meet the Neuse River Basin wide goal of protecting waters while accommodating
economic growth. For further information on the overall stormwater management plan
for the development, please refer to permit SW7060204 and associated application.
0

STORMWATER MANAGEMENT PERMIT APPLICATION FORM (SWU-101 VER. 3.99)
PART III PROJECT INFORMATION
ITEM 9 - DRAINAGE AREAS
RIVER DUNES MARINA AND RESIDENTIAL DEVELOPMENT — RV AND BOAT STORAGE AREA
for
RIVER DUNES CORPORATION
Drainage Area
1
2
3
4
Basin Information
RV-1
RV-2
RV-3
RV-4
Receiving Stream Name
Parris Creek
Neuse River
Neuse River
Neuse River
Receiving Stream Class
SA NSW
SA NSW
SA NSW
SA NSW
Drainage Area (Square Feet)
113,175
111,263
57,491
56,084
Existing Impervious Area (Square Feet)
0
0
0
0
Proposed Impervious Area (Square Feet)
85,153
86,067
46,416
47,070
% Impervious Area (Total)
75
77
81
84
Impervious Surface Area (Sq. Feet)
On -Site Buildings *
48,412
48,414
8,709
6,113
On -Site Streets
0
0
0
0
On -Site Parking (gravel)
36,741
37,653
37,707
40,957
On -Site Sidewalks
0
0
0
0
Off -Site
0
0
0
0
Total (Square Feet)
85,153
85,067
46,416
47,070

IJ
Carolina Engineers, R.A.
Sieve Analysis Report
SOURCE OF MATERIAL: North Side Marina Stockpile CLIENT: River Dunes Corporation
PROJECT: River Dunes; Pamlico County, NC PROP. USE: Infiltration Basin Fill Material
SAMPLED: May 24, 2006 PROJECT NO. 484
SAMPLE NUMBER: No. 1
SIEVE ANALYSIS
DATE: 5/25/2006
TECHNICIAN: John Switzer
SAMPLE SIZE: 741.5 (g)
Sieve Size
Weight
Retained
Percent
Retained
Total Percent
Passed
S ecifications
#4
1.2
0.16
99.8
NA
#10
2A
0.28
99.7
NA
1`40
374.4
50.5
49.5
NA
#200
691.5
93.4
i.6
I NA

�xftlal?- C
Laboratory Report Version 4.2
Permeability of Granular Soils (Constant Dead) *S&ME
ASTM D 2434
( ` 'ect #: 1053-07- Report Date: 3/27/07
:ct Name: Trader Construction Company Test Date(s) 3/23 - 3/26/07
Client Name: Trader Construction Company
Client Address: .2500 Hwy. 70 East, New Bern, NC 28560
Boring No. Bulk Bag Sample No. 2 Sample Date: 3/5/07
Location: Basin 2A - Stockpile at Riverside Elevation: NA
tit brown JAND (
1ii1i31 S ecnnen P�aramefers.
__'''� �nral S eczuienParauleters'� -,�,' t
Diameter, in:
2.879
Diameter, in:
2.879
Length, in:
5.740
Length, in:
5.740
Wet Unit Weight, pcf:
121.4
Wet Unit Weight, pcf:
128.6
Dry Unit Weight, pcf:
103.7
Dry Unit Weight, pcf:
103.7
Moisture Content, %:
17.0
Moisture Content, %:
24.0
Sas
s.`,S1r "PERMEABI[INMEASUREMENTSro
j r
op
Trrall
sW'
yYctiz3"
Wit;x
t .44 t z
'tem�Cw
%S
a ar yt" Y
!rA{s*Py,a,
uncorrecfer�l corrected)
1
53.17
9.00
19.0
8.97E-04
9.20E-04
2
51.87
9.00
19.0
.8.75E-04
8.97E-04
3
154.82
28.00
19.0
8.40E-04
8.61E-04
,a ? K; avetage,
c s r
8.71E-04
8.92E-04
L, cm: 14.580
A, cm 2 : 41.999
h, cm: 38.100
k=VL160Ath
where:
k = hydraulic conductivity, cm/sec
V = volume of water discharged, cm 3
L = length of test specimen, cm
A = cross -sectional area of test specimen, cm `
t = total time of discharge, min
It = hydraulic head difference (H1 - H2), cm
SOIL
SPECIMEN
Remarks: Test specimen compacted to 100% at 2.0% wet of optimum moisture (ASTM D-698).
References: ASTM D422: Method for Particle -Size Anal isys of Soils
nician Name: Mal Kraian
1 ethnical Responsibility: Mal Kraian
can�mnm, e
CONSTANT
HEAD
FILTER
HI
Laboratory Supervisor
PWn;w,
S&ME, INC.
3201 Spring Forest Road
Raleigh, NC 27616
Sample #2 Basin 2A - Stocpile at Riverside

•
•
•
Permit Number:
(to he ptuvided hp DWQ)
AUG 13 20 ►� Drainage Area Number:
A nfiltration Basin Operation and Maintenance Agreement
DWO WARD
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
— Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
— No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
— The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established, it will be inspected once a quarter and within
24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash debris.
The perimeter of the
infiltration basin
Areas of bare soil and/or
erosive gullies have formed.
Regrade the soil if necessary to
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer ap2lication.
The inlet device: pipe or
Swale
The pipe is clogged (if
applicable).
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Swale (if applicable).
Regrade the swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin O&M-Rev.3
Page I of 3

•
e
•
BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The forebay
Sediment has accumulated
and reduced the depth to 75%
Search for the source of the
sediment and remedy the problem if
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
wain.
The main treatment area
A visible layer of sediment
has accumulated.
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Water is standing more than
Replace the top few inches of filter
5 days after a storm event.
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive repair.
Weeds and noxious plants are
Remove the plants by hand or by
growing in the main
wiping them with pesticide (do not
treatment area.
spray).
The embankment
Shrubs or trees have started
Remove shrubs or trees
to grow on the embankment.
immediately.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
damage have occurred at the
outlet.
Contact the NC Division of Water
Quality 401 Oversight Unit at 919-
733-1786.
Form SW401-Infiltration Basin O&M-Rcv.3
Page 2 of 3

Permit Number:
(to be provided by DWQ)
E
•
•
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project nume:River Dunes Marina and Residential Develo ment - RV and Boat Stora e
BMP drainage area number:
Print
Titic:Prestdcnt
Address:416-a Pollock Street New BernNC 28560
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
(P S a Notary Public for the State of
r
County of do hereby certify that
(' , I 1-}./'1
\�'oxne5 %I M I ��P �� ✓ personally appeared before me this l
day of 2W , and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
My commission expires 1)--3 2Q
Form SW401-Infiltration Basin O&M-Rev.3
Page 3 of 3

RECEIVED Permit Number:
(to he provided by DINQJ
SDrainage Area Number:
��yy��AppU,A�G 13 rp2'0grtfiltration Basin Operation and Maintenance Agreement
adJYl�/O'tl ARO
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
•
Important maintenance procedures:
— The drainage area will be carefully managed to reduce the sediment load to the
infiltration basin.
— Immediately after the infiltration basin is established, the vegetation will be
watered twice weekly if needed until the plants become established (commonly
six weeks).
— No portion of the infiltration basin will be fertilized after the initial fertilization
that is required to establish the vegetation.
— The vegetation in and around the basin will be maintained at a height of
approximately six inches.
After the infiltration basin is established, it will be inspected once a quarter and within
24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal
County). Records of operation and maintenance will be kept in a known set location
and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
The entire BMP
Potential roblem:
Trash debris is resent.
How I will remediate the roblem:
Remove the trash/debris.
The perimeter of the
infiltration basin
Areas of bare soil and/or
erosive gullies have formed.
Regrade the soil if necessary to
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer a lication.
The inlet device: pipe or
swale
The pipe is clogged (if
a licable .
Unclog the pipe. Dispose of the
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
a licable .
Erosion is occurring in the
swale (if applicable).
Regrade the swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Form SW401-Infiltration Basin O&M-Rev.3 Page I of 3

O
BMP element:
Potential roblem:
How I will remediate the roblem:
The forebay
Sediment has accumulated
Search for the source of the
remedy the problem if
and reduced the depth to 75 %
sediment and
of the original design depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred or
Provide additional erosion
riprap is displaced.
protection such as reinforced turf
matting or riprap if needed to
revert future erosion roblems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticides are used, wipe
them on the plants rather than
srain.
The main treatment area
A visible layer of sediment
Search for the source of the
and remedy the problem if
has accumulated.
sediment
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP. Replace any media that
was removed in the process.
Revegetate disturbed areas
immediately.
Water is standing more than
Replace the top few inches of filter
•
5 days after a storm event.
media and see if this corrects the
standing water problem. If so,
revegetate immediately. If not,
consult an appropriate professional
for a more extensive re air.
Weeds and noxious plants are
Remove the plants by hand or by
growing in the main
wiping them with pesticide (do not
treatment area.
s ra .
The embankment
Shrubs or trees have started
Remove shrubs or trees
to row on the embankment.
immediatelv.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
The outlet device
needs re air.
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is dama ,ed
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919-
outlet.
733-1796.
Form SW401-Infiltration Basin O&M-Rev.3
Page 2 of 3

Permit Number:
(to he provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:Rivcr Dunes Marina and Residential Development - RV and Boat Storage
6MP drainage area
Print
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
f s , a Notary Public for the State of
n
County of l: IPA V� I\/ do hereby certify that '
fames Mike]) Jr personally appeared before me this
day of NlIg U a OLta , and acknowledge the due execution of the
forgoing infiltration basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires 1101/ 3 90 ID
1Form SW401-Infiltration Basin O&M-Rcv.3
Page 3 of 3