20070332 Ver 2_401 Application_20071207

ARCADIS
Infrastructure, environment facilities
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Division of Water Quality
401 Wetlands Unit .~ ~3
1650 Mail Service Center
Raleigh, NC 27699-1650
Subject:
PCN Application -Neuse River Basin Riparian Buffer Approval, GS Plantation
Point, LP; Raleigh, Wake County, North Carolina
Dear Sir/Madam:
Please find attached aPre-Construction Notification (PCN) Application for the above
referenced project. We are submitting the attached PCN Application for Neuse River
Basin riparian buffer impact approval. The proposed project will not impact
jurisdictional wetlands or streams.
Construction of two catch basins is proposed to collect and pipe stormwater runoff to
two onsite detention ponds. Outflow from the detention ponds to the downgradient
receiving streams will occur via level spreaders receiving the draw down flow from
the first flush of a 1" rain event. Flow exceeding the first flush will be diverted through
a flow splitter to a high flow bypass channel within the Neuse River Basin riparian
buffer that discharges to the creek channel.
Buffer impacts will occur in three areas. For Site 1, impacts to 20 square feet (SF) of
Zone 1 and 928 SF of Zone 2 will occur. For Site 2, impacts to 574 SF of Zone 1 and
276 SF of Zone 2 will occur. For Site 3, impacts to 555 SF of Zone 1 and 363 SF of
Zone 2 will occur. Cumulative impacts for the project are 1,149 SF for Zone 1 and
1,567 SF for Zone 2.
If you have any questions, please contact me at [phone].
Sincerely,
ARCADIS G&M of North Carolina, Inc.
v ~~
Linda Diebolt
Senior Scientist
Copies:
Jon Callahan -John A. Edwards & Company
Todd Wigfield - Greystar Development Group, LP
ARCADIS G&M of North Carolina, Inc.
801 Corporate Center Drive
Suite 300
Raleigh
North Carolina 27607
Tel [phone]
Fax [phone]
www.arcadis-us.com
WATER RESOURCES
Date:
14 December 2007
Contact:
Linda Diebolt
Phone:
220
Email:
Idiebolt @ arcadis-us.com
Our ref:
NC707012.0000

s ~ =~ 1
Form Version March OS
o~ -o33a V2
fit any particular ttem is not applicable to thts project, please enter "Not Applicable" or "N/A".)

1. 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:
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 here: ^
1. Owner/Applicant Information
Name: Mr. Todd Winfield / GS Plantation Point LP
Mailing Address: 18 Broad Street, 3rd Floor
Charleston, SC 29401
Telephone Number: 843-579-3236 Fax Number: 843-579-9420
E-mail Address: twil?field@~reystar.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: Ms. Linda Diebolt
Company Affiliation: ARCADIS
Mailing Address: 801 Corporate Center Dr Suite 300
Raleigh North Carolina 27607
Telephone Number: 919-854-1282 Fax Number: 919-854-5448
E-mail Address: [e-mail]
Updated 1 l/1/2005 ~ ~ ~ ~ ~~~ p
Page 5 of 13 if j'
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pENR - WATER Qwat lI]L

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Attach a clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed 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 may be 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: GS Plantation Point, LP
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 1727.14-23-6934
4. Location
County: Wake Nearest Town: Raleigh
Subdivision name (include phase/lot number): Plantation Point Apartments
Directions to site (include road numbers/names, landmarks, etc.): From I-440 Beltline, take
Capital Blvd. (US 1) north. Turn left on Old Wake Forest Rd. Turn right on Sumner Blvd
The site is located at the end of Sumner Blvd., along Ruritania St. and abuts the right-of--way
for I-540.
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): 35.87294722 °N 78.59081111 °W
6. Property size (acres): 23.43 acres
7. Name of nearest receiving body of water: Perry Creek
8. River Basin: Neuse
(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 site is currently undeveloped. The surrounding land use
consists of commercial and residential development roadways and small areas of
undeveloped land.
Updated I l/1/2005
Page 6 of 13

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10. Describe the overall project in detail, including the type of equipment to be used: The
project consists of the construction of an apartment complex. Equipment to be used is
expected to include clearers, graders, front-end loaders, back-hoes, and pavers.
11. Explain the purpose of the proposed work: The purpose of the proposed work is to develop
the site for a proposed apartment complex.
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.
No permits have been requested or obtained for the project to date.
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 at this time.
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,
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.
1. Provide a written description of the proposed impacts: No impacts to waters are
proposed.
Updated 11/t/2005
Page 7 of 13

2. 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 imnacts due t~ h~th stn~cture and flenrlinu_
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
( es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)

Total Wetland Impact (acres)
3. List the total acreage (estimated) of all existing wetlands on the property:
4. 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 be included. To calculate acreage_ multiply lenuth X width. then riivirle by d'~ S~(1
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
(acres)

Total Stream Impact (by length and acreage)
5. 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
fell, excavation. dredQin~_ fln~ding_ draina~e_ hnikhead.c etc.
Open Water Impact
Site Number
(indicate on ma)
Name of Waterbody
(if applicable)
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,

ocean, etc.) Area of
Impact

(acres)

Total Open Water Impact (acres)
Updated 11 / 1 /2005
Page 8 of 13

6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0
Wetland Impact (acres): 0
Open Water Impact (acres): 0
Total Impact to Waters of the U.S. (acres) 0
Total Stream Impact (linear feet): 0
7. 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.
8. 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 pond:
Size of watershed draining to pond: Expected pond surface area:
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.
All impacts to waters of the US have been avoided.
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.
Updated l l/l/2005
Page 9 of 13

USAGE - 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 USAGE 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 (see DWQ website for most current
version.).
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
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
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://www.nceep.net/ages/inlieureplace.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 of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Updated 11/1/2005
Page 10 of 13

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 a NEPA/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 ^
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,
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
(Neuse), 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 Neuse )? 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
(square feet) Mitigation
1 1,149 3 (2 for Catawba)
2 1,567 1.5
Total I 2,716
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.
3. 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.
Mitigation is not required as proposed impacts are listed as "allowable".
Updated 11/1/2005
Page 11 of 13

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°Io, please provide calculations
demonstrating total proposed impervious level.
I~ervious acreage is 0.0 acres existing and 11.2 acres posed. Two catch basins are proposed
to be constructed to collect and pipe stormwater runoff to proposed onsite detention ponds.
Outflow from the detention ponds to the downgradient receiving stream will occur via level
spreaders receiving the draw down flow from the first flush of a 1" rain event. Flow exceeding
the first flush will be diverted through a flow sputter to a high flow bypass channel through the
Neuse River Basin riparian buffer directly to the creek channel. See attached "stormwater
Calculations" for additional information and calculations.
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.
An 8" sanitary sewer main will be installed to carry the wastewater generated from the
development of the site and subsequent intended use thereof. The proposed sewer main will
connect to a nearby existing sanitary sewer main.
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
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:
The proposed development is not anticipated to induce additional development thereby resulting
in new impacts to downstream water quality.
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
Updated I 1 / I /2005
Page 12 of 13

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).
None.

V 4c.t.. IPres~
ApplityAgent's Signature' Dat(;
(Agent's signs a is valid only if an authorization letter fiom the applicant is provided.)
UpdTted 11/t/20p5
Page 13 of 13

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Plantation Point Apartments
0 1,000 2,000 4,000 Raleigh, North Carolina
Feet Sources: U.S.G.S. 7.5-minute Topographic Quadrangle Maps:
Raleigh East and Wake Forest, North Carolina; Wake County G/S 2007

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Soils Map
Plantation Point Apartments
Raleigh, North Carolina
Sources: NRCS 1970; Wake County GIS 2007

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Aerial Photo
Plantation Point Apartments
Raleigh, North Carolina
Sources: NAIP 2006, Wake County GIS 2007

Permit Number: O ~- 0 3 3 e~, V ~'
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
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:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection 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: Potential roblem: How I will remediate the roblem:
The entire filter strip Trash/ debris is present. Remove the trash/ debris.
s stem
The flow splitter device The flow sputter device is Unclog the conveyance and dispose
(if applicable) clo ed. of an sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged. replace if damage is too large for
re air.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 1 of 3

BMP element: Potential roblem: How I will remediate the roblem:
The Swale and the level The Swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise dama ed.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it. water until it is established. Provide
lime and aone-time fertilizer
a lication.
Trees or shrubs have begun Remove them.
to grow on the Swale or just
downslo a of the level li .
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish ro er erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if a licable . a roximatel three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer a lication.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer a lication.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide aone-time
fertilizer a lication.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversi ht Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 2 Of 3

Permit Number: O a- O .~ 3 a~ a-
(to be 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: C~5 '~ la.~n.fa-~'o~+ Po,~-t- Llp
BMP drainage area number: Basin 1 -level treader A
13y : ~s PI~„~~,~
Print name:
Title:
Addre
Phone
Signat
Date: ~ .
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.
I,
~arsG~ll
a Notary Public for the State of
~ ~~ l ~i.f[~`llrl~, ,County of V ~_, do hereby certify that
~- G ~e ~ personally appeared before me this
day of I..J~C , ~, and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
®~8~495B9EFFz,~ye~!
,a, dxi4 •~ .dI 'd'y9
,. .....
f ~.
-` r
r: e _r
SEAL
I~~ /~
My commission expires ~ ~ 2'

Z~i~Q~
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 Of 3

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
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:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
maybe allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection 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: Potential roblem: How I will remediate the roblem:
The entire filter strip Trash/debris is present. Remove the trash/debris.
s stem
The flow splitter device The flow sputter device is Unclog the conveyance and dispose
(if applicable) clo ed. of an sediment off-site.
The flow splitter device is Make any necessary repairs or
damaged. replace if damage is too large for
re air.
Form SWLJ401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 1 of 3

BMP element: Potential roblem: How I will remediate the roblem:
The Swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise dama ed.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it. water until it is established. Provide
lime and aone-time fertilizer
a lication.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslo a of the level li .
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish ro er erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if a licable . a roximatel three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer a lication.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer a lication.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying, problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide aone-time
fertilizer a lication.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversi ht Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 2 Of 3

Permit Number:
(to be 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: ,,,...~,.:,.~ ~,.;,,~ ~ rte,-~w,A„r~ 6 S 1'71 ~.v~-}~-{~ .e v~ ~o i ~ t- ~- IFS
BMP drainage area number: Basin 2 -level spreader B
Print name: '~ o c~ d W ~~ S ~''~ ~~
Title: U ~' c.,2 C /'~.S ~ ~deri7C"
Address: ~ ~ ~,~vG aC S'Me..~f 3 ~ Ft.o o r (~ lr..a./Lc r-ho .~ ~ .SL Z`~ 4-~
Phon
Sign.
Date
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.
I, '~„~n ~ rs lea l 1 , a Notary Public for the State of
~~ Cq ro ~tvta ,County of ~ ~~2SfU`^ , do hereby certify that
~~ ~ i S~ e (cQ personally appeared before me this I ~~
day of ~ L 20d~, and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal, ~~~ ~~,P/p~ p~
r ~,
Z `w r~~c
„ +
., .. , a ~,, i FY-a
`.. ^~
....... s i'~i 4..
`' g'°' 6"' ~ f v~°~ o
SEAL
My commission expires ~ " `Z y ~ `~
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 3 Of 3

0`1-o33a.v2.
Stormwater Calculations
Project: Plantation Point
Apartments

~ _ ldf {~1
~:~z~ l
.,
Date: 12/10/07
By: Jon Callahan, PE
John A. Edwards & Co.
333 Wade Avenue
Raleigh, NC 27605
[phone]

Stormwater Narrative
With the exception of the creek buffers and SHOD yard, the existing site has
been cut-over and mainly consists of young undergrowth. The existing
drainage patterns on-site ultimately drain to 2 locations: Basin 1 (Level
Spreader A) is the western side of project which drains into existing draw
and flows northwest to an existing culvert under the railroad. Basin 2 (Level
Spreader B) is southeastern side of project which drains into an existing
creek and flows north to an existing 84" culvert under I-540. In trying to
keep with existing drainage patterns the stormwater collection network for
the project includes 2 systems comprised of a series of catch basins to collect
and pipe the run-off to detention ponds near the outlets described above at
the two low ends of the project. The pond located on the east side will be a
wet pond and the pond on the west will be a dry pond. These ponds will
serve as both Stormwater retention and nitrogen reduction and will be
reviewed and approved by the City of Raleigh. The site complies with part
10 chapter 9 of the Raleigh city code for stormwater nitrogen reduction and
Stormwater runoff control.
Downstream of each retention BMP will be a level spreader in accordance
with the NCDENR DWQ BMP manual. Each level spreader is designed to
handle the draw down flow from the first flush (1 ") rain event. Flow
exceeding the first flush will be diverted with a flow splitter to a high flow
bypass channel in the Neuse River Buffer directly to the creek channel.
Each bypass channel requires approval by DWQ since there is an impact to
the Neuse River Buffer.
Additionally, there is a proposed 8" sanitary sewer main which will impact
the buffer and require DWQ approval. The existing sanitary sewer main and
easement is located within the buffer and flows north parallel to the CSX
railroad on the west side of the property. In order to tie in to the existing
sewer, the proposed main will impact the Neuse River Buffer.
Enclosed with this summary are the design calculations for the level
spreaders and bypass channels including pictures of the Level Spreader
locations and level spreader worksheets.
All assurances, access and maintenance easements, and deed restrictions to
be reviewed and approved by the City of Raleigh and recorded as required.

Stormwater Retention Summar~~
Pond A Design Dry Pond
Required Storage (First Flush 1"rainfall)
Rv=0.05+0.9(Ia) Ia=5.56/7.29=0.76 Rv=0.73
V=3630(1")(Rv)(A)= 19,317 CF
25% extra required
Required Storage Volume = 24,147 CF
Design Pond meets require storage at a depth of 3.4' - OK
48 HR min drawdown -Orifice Eq
Q=24,147 cf/48hrs = 0.13 cfs max
Q=CdA(2gh)
Try 1/2" orifice with h=1.7' (avg depth)
Q=(0.6)(0.0014)(2)(32.2)(1.7)=0.09 CFS
Drawdown Orifice =1/2"
Pond Outflow (see routing)
Q2 = 11.01 cfs
Qlo = 32.95 cfs - OK
Flow Splitter to Level spreader
Q=0.09 cfs
L=Q(65') forest = 5.85' use 15'
Flow Splitter to Bypass Channel
Use Q 10 for design = 32.95 cfs
D50=12" -Rip Rap Ditch is stable (see attached channel
worksheet)

Pond BDesign -Wet Pond
6' deep SA/DA=1.34% (Table 10-1 DWQ Manual)
Req'd SA=6951sf
Design pond SA=9092sf - OK
Required Storage (First Flush 1" rainfall)
Rv=0.05+0.9(Ia) Ia=6.19/11.91=0.52 Rv=0.5178
V=3630(1")(Rv)(A)= 22,386 CF
Design Pond meets require storage at a depth of 2.0' - OK
48 HR min drawdown -Orifice Eq
Q=22,386 cf/48hrs = 0.13 cfs max
Q=CdA(2gh)
Try 3/4" orifice with h=1.0' (avg depth)
Q=(0.6)(0.0031)(2)(32.2)(1.0)=0.12 CFS
Drawdown Orifice = 3/4"
Pond Outflow (see routing)
Q2 = 17.77cfs
Qla = 35.73 cfs - OK
Flow Splitter to Level spreader
Q=0.12 cfs
L=Q(65') forest = 7.80' use 15'
Flow Splitter to Bypass Channel
Use Q10 for design = 35.73 cfs
D50=12" -Rip Rap Ditch is stable (see attached channel
worksheet)

Bypass Channel Calculations

11****it***1k***~It*'k*******it******************************************************
NORTH AMERICAN GREEN EROSION CONTROL MATERIALS DESIGN SOFTWARE VERSION 4.3
NORTH AMERICAN GREEN CHANNEL PROTECTION -ENGLISH/S.I.
USER SPECIFIED CHANNEL LINING BACK-UP COMPUTATIONS
*****************************************************************************
PROJECT NAME: Plantation Point PROJECT NO.: Pond A -outlet
COMPUTED BY: JRC DATE: 12/10/2007
FROM STATION/REACH: TO STATION/REACH:
DRAINAGE AREA: by-pass channel DESIGN FREQUENCY: 10 yr
*****************************************************************************
INPUT PARAMETERS
*****************************************************************************
Channel Discharge :33.0 cfs (.93 m"3/s)
Peak Flow Period :0.05 hours
Channel Slope :0.022 ft/ft (0.022 m/m)
Channel Bottom W idth : 2.0 ft (.61 m)
Left Side Slope : 3:1
Right Side Slope : 3:1
Channel Lining :Rock Riprap 10in
Permi. Shear(Tp) :3.33 psf (159.6 Pa)
Phase = 0
*****************************************************************************
CALCULATIONS
*****************************************************************************
Initial Depth Estimate = 0.16 * (33.0 /(0.022^0.5))^0.375 = 1.21 ft (.37 m)
Final Channel Depth (after 8 iterations) = 1.87 ft (0.57 m)
Flow Area = (2.0 * 1.9)+(0.5 *1.87^2 * (3.0+3.0)) = 14.2 sq.ft (1.3 m"2)
Wet Per. =2.0 +(1.9*(((3.0^2)+1)".5 +((3.0"2)+1)".5)) = 13.8 ft (4.2 m)
Hydraulic Radius = (14.2 / 13.8) = 1.0 ft (0.3 m)
Channel Velocity =(1.486/0.096)*(1.0"0.667)*(0.022".5) = 2.3 fps (0.7 m/s)
Channel Effective Manning's Roughness = 0.096
Calculated Shear (Td) = 62.4 * 1.87 * 0.022 = 2.56 psf (122.7 Pa)
Safety Factor = (Tp/Td) _ (3.33 /2.56) = 1.30

nrmnmedrwnr .en-Fnmsve,ainnl3 ~ih lnnnn lm
-IVrxtel n u~ R ~ ~ TS
isrherg Peek Vemtly Nee hydraulic Normd
(de) Flaw (Ipe) (s9~1Q Rediu~ De
3.0 0.1 2.33 11.19 1.03 1.87
Rods Fir -0.99
II 5 - 0 0220 I
1 O Bahog.00R 3 1
No1m Smle

ReecA MelengTypa egeleaon Charectedstis CdcWeted Sdey RemMra
Smple gnelyc ea pesa Type erre rmienible Sheen Femr
Sbeight Rods Riprep lhrvegemm 3.33 2.56 1.30 SiPBLE
loin
Bedctp mpm screen

11****yP*************1k1k1k********************************************************
NORTH AMERICAN GREEN EROSION CONTROL MATERIALS DESIGN SOFTWARE VERSION 4.3
NORTH AMERICAN GREEN CHANNEL PROTECTION -ENGLISH/S.I.
USER SPECIFIED CHANNEL LINING BACK-UP COMPUTATIONS
*****************************************************************************
PROJECT NAME: Plantation Point PROJECT NO.: Pond B -outlet
COMPUTED BY: JRC DATE: 12/10/2007
FROM STATION/REACH: TO STATION/REACH:
DRAINAGE AREA: by-pass channel DESIGN FREQUENCY: 10 yr
*****************************************************************************
INPUT PARAMETERS
*****************************************************************************
Channel Discharge :35.7 cfs (1.01 m^3/s)
Peak Flow Period :0.05 hours
Channel Slope :0.04 ft/ft (0.04 m/m)
Channel Bottom W idth : 6.0 ft (1.83 m)
Left Side Slope : 3:1
Right Side Slope : 3:1
Channel Lining :Rock Riprap 12in
Permi. Shear(Tp) :4.00 psf (191.5 Pa)
Phase = 0
*****************************************************************************
CALCULATIONS
*****************************************************************************
Initial Depth Estimate = 0.16 * (35.7 /(0.040"0.5))^0.375 = 1.12 ft (.34 m)
Final Channel Depth (after 8 iterations) = 1.3 ft (0.40 m)
Flow Area = (6.0 * 1.3)+(0.5 *1.30^2 * (3.0+3.0)) = 12.8 sq.ft (1.2 m"2)
Wet Per. =6.0 +(1.3*(((3.0^2)+1)^.5 +((3.0"2)+1)^.5)) = 14.2 ft (4.3 m)
Hydraulic Radius = (12.8 / 14.2) = 0.9 ft (0.3 m)
Channel Velocity =(1.486/0.100)*(0.9^0.667)*(0.040".5) = 2.8 fps (0.8 m/s)
Channel Effective Manning's Roughness = 0.100
Calculated Shear (Td) = 62.4 * 1.30 * 0.040 = 3.24 psf (155.2 Pa)
Safety Factor = (Tp/Td) _ (4.00 /3.24) = 1.23

Amnrir nfmrm-Fnms verann43 211~111Y%M 1~
f1YDRAULIC RESULTS
-echerg Peck Vebdy Mee Hydraulic Namel
ds Flow s e . Radius De
5.7 0.1 2.70 1205 0,90 1.30
Rodc~W~ ~J~QpO i
5 - 0.0400
1 3.0 ,N1dU -~00'ft ~i
Notro Scale

Reach MaiOng Type
Sb6iI4y egelation Chmar2eda0rs
Cdwlelad
Seby
Remarks
Sleple Anetyaie ea pass Type ens mecsible Shaer FecOOr
StrelgM Rock Riprop Ums9elate 4.00 324 1.23 STABLE
12in
BedctoInpulSpeen

Level Spreader Worksheets and Pictures

O~O~ W AT Eq~G
~~~ ~~-o33a v~
NCDENR ~ Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along w-th all of the required information.
Project name
Contact name
Phone number
Date
Drainage area number
Plantation
Jon Callat
919-8281f428
Decemt>er10,2007
Basin 1- Pond A -Level Spreader A
II. DESIGN INFORMATION
For Level Spreaders Receiving Flow From a BMP
Type of BMP Dry Detention Pond
Drawdown flow from the BMP 0.09 cfs
For Level Spreaders Receiving Flow from the Drainage Area
Drainage area
Impervious surface area
Percent impervious
Rational C coefficient
Peak flow from the 1 inlhr storm
Time of concentration
Rainfall intensity, l0-yr storm
Peak flow from the 10-yr storm
Where Does the Level Spreader Discharge ?
To a bioretention cell?
To a wetland?
To a filter strip or riparian buffer?
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass
Width of dense ground cover
Width of wooded vegetation
Total width
Slope (from level lip to to top of bank)
Are any draws present?
Level Spreader Design
Forebay surface area
Feet of level lip needed per cfs
Answer "Y" to one of the following:
Length based on the 1 inlhr storm?
Length based on the 10-yr, 24-hr storm?
Length based on the BMP discharge rate?
Design flow
Is a bypass device provided?
Length of the level lip
Are level spreaders in series?
Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
ftz
fiz
cfs
min
inlltr
cfs
(Y or N)
(Y or N)
Y (Y or N)
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet.
Do not complete this section of the worksheet
Do not complete this section of the worksheet
Please complete flier strip characterization below.
ft
ft
50 ft
50 ft
2.2
N (Y or N)
NIA sq ft
65 ft/cfs
Y (Y or N)
N (Y or N)
Y (Y or N)
0.09 cfs
Y (Y or N)
15 ft
N (Y or N)
N (Y or N)
Y
OK
OK
OK
#b'ALUE'
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Pans I. and II. Design Summary, page 1 of 2

Dimensions of the channel (see diagram below):
M
B
W
Y
Peak velocity in the channel during the 10-yr, 24-hr storm
Channel lining material
t •-----
M
3 ft
2 ft
14 ft
2 ft
2.3 fps 33.0 cfs cfs
rip rap d50=12"
W
----• t
M

Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 2 of 2

111. REQU D ITEMS CHECKLIST
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Ini ials Sheet No.
~_ 1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,
-Off-site drainage (if applicable),
-Delineated drainage basins (include Rational C coefficient per basin),
-Forebay (if applicable),
-High flow bypass system,
-Maintenance access,
-Recorded drainage easement and public right of way (RO1/1~, and
-Boundaries of drainage easement.
~ C'~ 2. Plan details (1" = 30' or larger) for the level spreader showing:
~ - Forebay (if applicable),
-High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Recorded drainage easement, and
-Design at ultimate build-out.
r% C ~ 3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
- Level lip,
- Upslope channel, and
%AL~c ~AT~' - Downslope filter fabric.
,~i2 ( PA~~ 4. Adate-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
~~ C: iTt or- ~Al~~
~j,/ C Pnv~' ~~ 5. An assurance that the installed system will meet design specifications upon initial operation once the
~~ ~ tT~ of ~,,~~roject is complete and the entire drainage area is stabilized.
~ AP°~-'ht- 6. A construction sequence that shows how the level spreader will tie protected from sediment until the entire
U
drainage area is stabilized. ~ ~ 2 q~S~
~t,Cxt t,.4i~
~""' 7. The supporting calculations.
~~ Q'f l~hLl{r~ 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
~ C~tY vE IzA. ~-tF ra
~~~ As~¢a~~a~.. 9. A copy of the deed restriction.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1

d ~~dN~'xds ~3~3 ~

~~=
NCDENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
O2~F W ATF9PG
~ ~
> y
O
LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part lll) must be printed, filled out and submitted along with all of the required information.
Project name
Contact name
Phone number
Date
Drainage area number
Plantation
Jon Callat
919-828-0428
December 10, 2007
Basin 2 - Pond B -Level Spreader B
II. DESIGN INFORMATION
For Level Spreaders Receiving Fbw From a BMP
Type of BMP Dry Detention Pond
Drawdown flow from the BMP 0.12 cfs
For Level Spreaders Receiving Flow from the Drainage Area Do not complete this section of the worksheet.
Drainage area ft
Impervious surface area ftz
Percent impervious Do not complete this section of the worksheet.
Rational C coefficient Do not complete this section of the worksheet.
Peak flow from the 1 in/hr storm cfs Do not complete this section of the worksheet.
Time of concentration min
Rainfall intensity, l0-yr storm in/hr Dc not complete this section of the worksheet.
Peak flow from the 10-yr storm cfs Dc not complete this section of the worksheet.
Where Does the Level Spreader Discharge?
To a bioretention cell? (Y or N)
To a wetland? (Y or N)
To a filter strip or riparian buffer? Y (Y or N) Please complete filter strip characterization below.
Other (specify)
Filter Strip or Riparian Buffer Characterization (if applicable)
Width of grass ft
Width of dense ground cover ft
Width of wooded vegetation 50 ft
Total width 50 ft
Slope (from level lip to to top of bank) 4
Are any draws present? N (Y or N) OK
Level Spreader Design
Forebay surface area NIA sq ft OK
Feet of level lip needed per cfs 65 ftlcis
Answer "Y" to one of the following:
Length based on the 1 in/hr storm? Y (Y or N)
Length based on the 10-yr, 24-hr storm? N (Y or N)
Length based on the BMP discharge rate? Y (Y or N)
Design flow 0.12 cfs
Is a bypass device provided? Y (Y or N) OK
Length of the level lip 15 ft #VAI.UEI
Are level spreaders in series? N (Y or N)

Bypass Channel Design (if applicable)
Does the bypass discharge through a wetland? N (Y or N)
Does the channel enter the stream at an angle? Y

Fomt SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 1 of 2

Dimensions of the channel (see diagram below):
M
B
W
y
Peak velocity in the channel during the 10-yr, 24-hr storm
Channel lining material
J Il
6 ft
18 ft
2 ft
2.8 fps 35.7 cfs cfs
rip rap d50=12"
W
t •------
M
Y
E3

1
-------•
M
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Parts I. and II. Design Summary, page 2 of 2

IIt..:RE4UIRED MS:CH CKLIST'
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Ini als
Pagel Plan
Sheet No.
~-
1. Plans (1" - 50' or larger) of the entire site showing:
- Design at ultimate build-out,

~~
c~
-Off-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (if applicable),
-High flow bypass system,
-Maintenance access,
-Recorded drainage easement and public right of way (ROVI~, and
- Boundaries of drainage easement.
2. Plan details (1" = 30' or larger) for the level spreader showing:
- Forebay (if applicable),
-High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
-Recorded drainage easement, and
-Design at ultimate build-out.
3. Section view of the level spreader (1" = 20' or larger) showing:
- Underdrain system (if applicable),
-Level lip,
- Upslope channel, and
C:ALC.~t ~A~ - Downslope filter fabric.
Pau~'r 4. Adate-stamped photograph of the filter strip that clearly shows the type of vegetation that is present.
C IT't OF (ZAt,~~
o~~'~~- 5. An assurance that the installed system will meet design speafications upon initial operation once the
~ tT'/ vF ~~uproject is complete and the entire drainage area is stabilized.
AuP~ht- 6. A construction sequence that shows how the level spreader will be protected ftom sediment until the entire
drainage area is stabilized. C - ~ R~sv
(~~.Cci i,~4ri~
~~"'r 7. The supporting calculations.
QTTA~~ 8. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
City vF ~,lx`~'~
~~,~.a~ 9. A copy of the deed restriction.
Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.3 Part III, page 1 of 1

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Pond Routing Calculations

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.2 Monday, Nov 26, 2007
Hyd. No. 2
WET POND
Hydrograph type =Reservoir Peak discharge = 32.96 cfs
Storm frequency = 10 yrs Time to peak = 720 min
Time interval = 2 min Hyd. volume = 92,859 tuft
Inflow hyd. No. = 1 - SCS INFLOW POND A Max. Elevation = 281.57 ft
Reservoir name = WET POND A Max. Storage = 47,817 cult
Storage Indication method used.
WET POND
Q (cfs) Hyd. No. 2 -- 10 Year Q (cfs)
60.00 60.00
50.00 50.00
40.00 40.00
30.00 30.00
20.00 20.00
10.00 10.00
-----
0.00 - -- _ - - 0.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26
Time (hrs)
Hyd No. 2 Hyd No. 1 i i l~ I ~ Total storage used = 47,817 tuft

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.2 Monday, Nov 26, 2007
Hyd. No. 2
WET POND B
Hydrograph type =Reservoir Peak discharge = 35.73 cfs
Storm frequency = 10 yrs Time to peak = 722 min
Time interval = 2 min Hyd. volume = 138,521 cult
inflow hyd. No. = 1 - SCS INFLOW POND B Max. Elevation = 272.97 ft
Reservoir name = WET POND B Max. Storage = 60,428 cult
Storage Indication method used.
Q (cfs)
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
Q (cfs)
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00 _I I I _- ~ -~ 1 I ----~- ~ '- 0.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26
Time (hrs)
Hyd No. 2 Hyd No. 1 Iii , ~ ' ' ' Total storage used = 60,428 cult

DWQ Buffer Approval

0
W ArF9
pG
~~
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
March 8, 2007
Greystar Development Group, LP
Attn: Todd Wigfield
280 Seven Farms Drive, Suite C
Charleston, SC 29492
Subject Property: Plantation Point 2
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ EXP Project # 07-0332
Wake County
On-Site Determination for Applicability to the Neese River Riparian Area Protection Rules (1SA
NCAC 2B .0233) .
Dear Mr. Wigfield:
On March 7, 2406, at the request of Todd St. John of Kimley-Horn and Associates, Inc., an on-site
determination was conducted on two stream features located on the subject property for applicability to
the Neese Buffer Rules (ISA NCAC 2B .0233}. The stream features are labeled as "A" and "B" an the
attached maps initialed by Lia Myott on March 8, 2007.
The Division of Water Quality (DWQ) has determined that neither of the features labeled as "A"
and "B" on the attached map are subject to the Neese Buffer Rule. The owner (or future owners)
should notify the DWQ (and other relevant agencies) of this decision in any future correspondences
concerning this property. This on-site determination shall expire five (5) years from the date of this letter.
Landowners or affected parties that dispute a determination made by the DWQ that a surface water exists
and/or that it is subject to the buffer rule may request a determination by the Director. A request for a
determination by the Dvector shalt be referred to the Director in writing c% Cyndi Karoly, DWQ 401
Oversight/Express Review Permitting Unit, 2321 Crabtree Blvd., Raleigh, NC 27604-2260. You must act
within 60 days of the date that you receive this letter. Applicants are hereby notified that the b0-day
statutory appeal time does not start until the affected party (including downstream and adjacent
landowners) is notified of this decision. This determination is final and binding unless you ask for a
hearing within 60 days.
This letter only addresses the ephemeraUintermittent/perennial status of the stream and does not approve
any activity within Waters of the United States or Waters of the State. If you have any questions, please
contact Lia Myott at 919.733.9502.
Sincerely,
~,
~'
Alan W. Klimek, P.E.
AWK/cbk~lem
Attachments: NRCS Soil Survey Map, USGS Topo Quad Map
4010versigM/Express Review PemriWng UnR
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carol'u~a 27604
Phona: 919-733-1786! FAX 919 733~689311ntemet: htta:llh2o.enr.st~te,Jtc,usjp~~M1rgtlands
~~~~on~
MAR ~ ~ 2007

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