20051132 Ver 1_Complete File_20050804

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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
August 5, 2005
DVS Investors, LLC
Attn: Randy Smith
100 Weston Estates Way
Cary, NC 27513
Subject Property:
Chessington Subdivision, Morrisville, NC
Crabtree Creek [03-04-02, 27-33-(3.5), B, NSW]
Approval of 401Water Quality Certification with Additional Conditions
Dear Mr. Smith:
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ Project # 20051132
Wake County
You have our approval, in accordance with the attached conditions and those listed below, to place fill within or
otherwise impact 0.454 acres of wetlands, 200 feet of streams for the purpose of constructing a residential
subdivision at the subject property, as described within your application dated June 23, 2005 and received by the
N.C. Division of Water Quality (DWQ) on June 23, 2005. After reviewing your application, we have decided that
the impacts are covered by General Water Quality Certification Number(s) 3402 (GC3402). The'Certification(s)
allows you to use Nationwide Permit(s) 39 when issued by the US Army Corps of Engineers (USACE). In addition,
you should obtain or otherwise comply with any other required federal, state or local permits before you go ahead
with your project including (but not limited to) Erosion and Sediment Control, and Non-discharge regulations. Also,
this approval to proceed with your proposed impacts or to conduct impacts to waters as depicted in your
application shall expire upon expiration of the 404 or CAMA Permit.
This approval is for the purpose and design that you described in your application: If you change your project, you
must notify us and you may be required to send us a new application. If the property is sold, the new owner must be
given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If
total fills for this project (now or in the future) exceed one acre of wetland or 150 linear feet of stream,
compensatory mitigation may be required as described in 15A NCAC 211.0506 (h). This approval requires you to
follow the conditions listed in the attached certification and any additional conditions listed below.
The Additional Conditions of the Certification are:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and general conditions of
this Certification (or Isolated Wetland Permit) are met. No other impacts are approved including incidental
impacts:
Amount Approved nits Plan Location or Reference
Stream 200 feet Site D
404 Wetlands 0.454 acres Sites A, B and D
2. Erosion & Sediment Control Practices
Erosion and sediment control practices must be in full compliance with all specifications governing the
proper design, installation and operation and maintenance of such Best Management Practices in order to
protect surface waters standards:
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: htta://h2o.enr.state.nc.us/ncwetlands
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An Equal Opportunity/Affirmative Action Employer- 500/6 Recycled/100/6 Post Consumer Paper
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DVS Investors, LLC
Page 2 of 3
August 5, 2005
a. The erosion and sediment control measures for the project must be designed, installed, operated, and
maintained in accordance with the most recent version of the North Carolina Sediment and Erosion
Control Planning and Design Manual.
b. The design, installation, operation, and maintenance of the sediment and erosion control measures
must be such that they equal, or exceed, the requirements specified in the most recent version of the
North Carolina Sediment and Erosion Control Manual. The devices shall be maintained on all
construction sites, borrow sites, and waste pile (spoil) projects, including contractor-owned or leased
borrow pits associated with the project.
3. No Waste, Spoil, Solids, or Fill of Any Kind
No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond the
footprint of the impacts depicted in the Pre-Construction Notification. All construction activities, including
the design, installation, operation, and maintenance of sediment and erosion control Best Management
Practices, shall be performed so that no violations of state water quality standards, statutes, or rules occur.
4. No Sediment & Erosion Control Measures w/n Wetlands or Waters
Sediment and erosion control measures shall not be placed in wetlands or waters to the maximum extent
practicable. If placement of sediment and erosion control devices in wetlands and waters is unavoidable,
they shall be removed and the natural grade restored within six months of the date that the Division of Land
Resources has released the project.
5. Certificate of Completion
Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer
Rules, and any subsequent modifications, the applicant is required to return the attached certificate of
completion to the 401 Oversight/Express Review Permitting Unit, North Carolina Division of Water
Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650.
6. Diffuse Flow
All constructed stormwater conveyance outlets shall be directed and maintained as diffuse flow at non-
erosive velocities through the protected stream buffers such that it will not re-concentrate before
discharging into a stream as identified within 15A NCAC 2B .0233 (5). If this is not possible, it may be
necessary to provide stormwater facilities that are considered to remove nitrogen. This may require
additional approval from this Office. Additionally, a level spreader is required to be constructed at the
discharge outlet between lots 49 and 50 for this project.
7. Protective Fencing
The outside buffer, wetland or water boundary and along the construction corridor within these boundaries
approved under this authorization shall be clearly marked with orange warning fencing (or similar high
visibility material) for the areas that have been approved to infringe within the buffer, wetland or water
prior to any land disturbing activities to ensure compliance with 15A NCAC 2B .0233 and GC 3402.
8. Grading and Re-vegetation Within Zone 2
The plans provided along with the application depict grading activities within Zone 2 of the protected buffer.
This activity is designated as "exempt" under the Buffer Rule provided that fill is not placed in Zone 1, diffuse
flow is maintained as per the Buffer Rule, the disturbed areas are stabilized and re-vegetated, and the health of
the existing vegetation in Zone 1 is not compromised.
9. Construction Stormwater Permit NCG010000
Upon the approval of an Erosion and Sedimentation Control Plan issued by the Division of Land Resources
(DLR) or a DLR delegated local erosion and sedimentation control program, an NPDES General
DVS Investors, LLC
Page 3 of 3
August 5, 2005
stormwater permit (NCG010000) administered by DWQ is automatically issued to the project. This
General Permit allows stormwater to be discharged during land disturbing construction activities as
stipulated by conditions in the permit. If your project is covered by this permit [applicable to construction
projects that disturb one (1) or more acres], full compliance with permit conditions including the
sedimentation control plan, self-monitoring, record keeping and reporting requirements are required. A
copy of this permit and monitoring report forms may be found at
http://h2o.enr.state.nc.us/su/Forms Documents.htm.
10. Deed Notifications
Deed notifications or similar mechanisms shall be placed on all retained jurisdictional wetlands, waters and
protective buffers in order to assure compliance for future wetland, water and buffer impact. These
mechanisms shall be put in place prior to impacting any wetlands, waters and/or buffers approved for
impact under this Certification Approval and Authorization Certificate. A sample deed notification can be
downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetlands. The text of the
sample deed notification may be modified as appropriate to suit to this project.
Violations of any condition herein set forth may result in revocation of this Certification and may result in criminal
and/or civil penalties. The authorization to proceed with your proposed impacts or to conduct impacts to waters as
depicted in your application and as authorized by this Certification, shall expire upon expiration of the 404 or
CAMA Permit.
If you do not accept any of the conditions of this Certification (associated with the approved wetland or stream
impacts), you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this
letter. To ask for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General
Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This
certification and its conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you
have any questions, please telephone Cyndi Karoly at 919-733-9721 or Deborah Edwards at 919-733-9502.
AWK/cbk/dae
Enclosures: GC 3402
Certificate of Completion
Sincerely,
AI W. Klimek,
4E'
cc: Kevin Martin, S&EC, 11010 Raven Ridge Road, Raleigh, NC 27614
USACE Raleigh Regulatory Field Office
DWQ Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Filename: SA2005 Correspondence\20051132 Chessington Subdivision (Wake) 401 NBR.doc

051 132
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
Li www.SandEC.com
June 22, 2005
S&EC Project # 7841.W0 ' r
US Army Corps of Engineers
Attn: Ms. Andrea Wade
6508 Falls of the Neuse Rd., Ste. 120
Raleigh, NC 27615
RE: Nationwide Permit 39
Chessington Subdivision
Morrisville, Wake County, North Carolina
`?'11'
597
r ECEIVED 4
?' 'ANC Division of Water Quality
Attn: Cyndi Karoly
2321 Crabtree Blvd. Suite 250
Raleigh, NC 27604-2260
Dear Ms. Wade and Ms. Karoly:
JUN 2 ? 2005
DENR - NEATER QUALITY
WETLANDS M0 STOR09ER BM4CH
On behalf of DVS Investors, LLC (property owner), we hereby request authorization
from the US Army Corps of Engineers (USAGE) to use Nationwide Permit 39 for
proposed permanent impacts to jurisdictional wetlands, an unbuffered
intermittent/ephemeral channel, and are advising you of our clients plan to impact Zone 2
buffers (exempt activity) resulting from the construction of a residential subdivision. A
Pre-construction Notification Application (PCN) is attached, which includes an Agent
Authorization Form.
The site is located approximately 1000 feet south of the intersection of Davis Drive and
McCrimmon Parkway in Morrisville, NC. Please refer to the attached Figure 1 for the
project's location on a USGS topographic quadrangle.
The proposed project is a residential subdivision and associated road crossings and lot
construction. No previously issued permits are known to exist for the site.
Proposed construction includes 0.454 acres of permanent wetland impacts and 0.005
acres (200 linear feet) of permanent stream channel impacts to a borderline
intermittent/ephemeral channel within a wetland area. There will also be grading
activities performed in Zone 2 of the riparian buffer. Since the graded area will
revegetated, with grass, this is an "exempt" activity. The applicant will employ
appropriate erosion and siltation controls during construction.
Charlotte Office: Greensboro Office:
236 UPhillip Court, Suite C 3817-E Lawndale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
June 22, 2005
S&EC Project #: 7841.W0
Page 2 of 2
Nationwide-Permit 39
The USACE's current policy requires applicants to avoid and minimize wetland and
stream channel impacts to the maximum extent practicable and may require
compensatory mitigation to offset unavoidable losses of waters of the US when impacts
exceed the thresholds for notification (0.10 acre) or if a discharge causes the loss of any
open waters. S&EC does not believe stream mitigation should be required by the DWQ
or Corps for this project since impacts are to an intermittent channel. However, we do
expect that the USACE will require mitigation for Wetland Impacts. The client proposes
payment to the NCEEP for these impacts. Impacts were avoided and minimized to the
greatest extent practical for this to be a viable project. Buffer impacts that require DWQ
approval were avoided completely. In order to provide access to develop high ground
lots 0.454 acres of wetland are to be impacted.
Neuse River Buffer Rules
The Neuse River Buffer rules state: "Grading and revegetating Zone 2 is allowed
provided that the health of the vegetation in Zone 1 is not compromised, the ground is
stabilized and existing diffuse flow is maintained." Due to this allowance, S&EC does
not believe buffer mitigation should be required for this project since grading in Zone 2
(0.20 acres) is an "exempt" activity.
Sincerely,

Kevin Martin
Attachments:
Pre-construction (PCN) notification form
Agent Authorization Form
Site Location Map-USGS (Figure 1)
Site Location Map - County Soil Survey (Figure 2)
Proposed Wetland Impact Maps (5)
DWQ Stream Identification Form
Level Spreader calculations and designs (DWQ only)
Impervious surface calculations (DWQ only)
$475.00 application fee (DWQ only)
NCEEP Acceptance Letter
Office Use Only: Form Version March 05
USACE Action ID No. DWQ No. 05 1132
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing PAYMENT
1. Check all of the approval(s) requested for this project: RECEIVED
® 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: 39
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:
II. Applicant Information pc?
e ? LOO.1
1
Owner/Applicant Information 3l1N
Name: Randy Smith
Mailing Address: DVS Investors, LLC ?osTCtt???tx?r?a€><?
n ?? rs
100 Weston Estates Way°t
Cary, NC 27513
Telephone Number: 919 481-3000 Fax Number: 919 677-8600
E-mail Address:
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: Kevin Martin
Company Affiliation: Soil & Environmental Consultants, PA
Mailing Address: 11010 Raven Ridge Road
Raleigh, NC 27614
Telephone Number: 919 846-5900 Fax Number: 919 846-9467
E-mail Address: [e-mail]
Page 1 of 8
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps 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 1I 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 ofproject: Chessington Subdivision
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 0745-38-5045
4. Location
County: Wake Nearest Town: Morrisville
Subdivision name (include phase/lot number): Chessington Subdivision
Directions to site (include road numbers/names, landmarks, etc.): Traveling westbound on
Morrisville Carpenter Road, turn right onto Davis Drive The site is approximately 4500
feet ahead, on the right-hand side, before the intersection of Davis Drive with the
McCrimmon Parkway. See Figure 1 for the site location.
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): 35.832772 ON 78.853086 °W
6. Property size (acres): 20.48
7. Name of nearest receiving body of water: Crabtree 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
properties are mostly vacant, but include some residential and commercial properties
Page 2 of 8
10. Describe the overall project in detail, including the type of equipment to be used: The
proposed residential development includes single family lots, access roads and utilities.
Typical heavy equipment for grading activities will be utilized.
11. Explain the purpose of the proposed work: The purpose of the proposed work is to
construct a residential subdivision.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. Andrea Wade of USACE previously met Nelson Paul onsite to
confirm his delineation. DWO also confirmed Mr. Paul's buffer determinations. S&EC has
not been provided with letters from DWO or the Corps on this matter but they have verbally
acknowledged that they reviewed and confirmed Mr. Paul's work with revisions.
V. I Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No future impacts are anticipated.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
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: Proposed impacts include
0.445 acres of wetland impacts: 0.005 acres of non-buffered, intermittent/ephemeral
channel: and 0.20 acres of buffer impact (Zone 2). The buffer impacts are considered
"exempt" activities Grading and re-vegetating_ Zone 2).
Page 3 of 8
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 impacts due to both structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of
Site Number Type of Impact (e.g., forested, marsh, 100-year Nearest Impact
(indicate on map) herbaceous, bog, etc.) Floodplain Stream (acres)
(yes/no) (linear feet)
A Fill Headwater Forest No 50 0.08
B Fill Headwater Forest No 50 0.28
D Fill Headwater Forest No 50 0.094

Total Wetland Impact (acres) 0.454
3. List the total acreage (estimated) of all existing wetlands on the property: 0.83
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. multinlv length X width. then divide by 43.560.
Stream Impact
Perennial or Average Impact Area of
Number Stream Name Type of Impact Intermittent? Stream Width Length Impact
(indicate on ma) Before Impact (linear feet) (acres)
D ut of Crabtree Fill Intermittent 1' 200 005
0
Creek .

Total Stream Impact (by length and acreage) 200 0.005
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
fill. excavation. dredging. flooding. drainage. bulkheads. etc.
Open Water Impact Name Waterbody Type of Waterbody Area of
Site Number (if applicable) e) Type of Impact (lake, pond, estuary, sound, bay, Impact
(indicate on ma) ocean, etc.) (acres)
N/A N/A N/A N/A N/A

Total Open Water Impact (acres) N/A
6. List the cumulative impact to all Waters of the U.S. resulting from the nroiect:
Stream Impact (acres): 0.005
Wetland Impact (acres): 0.454
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres) 0.459
Total Stream Impact (linear feet): 200
Page 4 of 8
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.
Several pockets with proposed impacts appear isolated on the map; however the previous
consultant has not indicated that this was verified by the Corps. We reserve the right to
pursue this determination at a later date if needed.
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:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts. In order to minimize
impacts, all buffered stream channels and wetlands within Zone 1 of the buffers have been
avoided. Road crossing were placed so they avoid buffers and important streams. The site
plan was redesigned in order to minimize wetland and Zone 2 buffer impacts to the greatest
extent possible while still achieving a viable moiect.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
Page 5 of 8
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http://h2o.enr.state.nc.us/ncwetiands/stringide.html.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
Wetland impacts are only 0.454acre. it is not expected that wetland mitigation will be
required by DWQ• however, to satisfy USACE requirements we propose payment into the
NCEEP at a 1:1 ratio.
As stream impacts are to an intermittent channel, it is not expected that mitigation will
be required.
Grading in Zone 2 will not affect the health of the vegetation in Zone 1. and is an exempt
activity: buffer mitigation should not be required.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http://h2o.enr.state.nc.us/wrn/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres): 0.454
Amount of Non-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Page 6 of 8
IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ? No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether 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 ?
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify V 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.
Impact Required
Zone* , ......_.. r 0. Multiplier x4;+:.
II 1 I 0 13 (2 for Catawba) I 0
I 2 8,685 1.5 0
Total I 8,685 I 1 0
* 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 213 .0242 or .0244, or .0260. Grading in Zone 2 with re-vegetation is
"exempt", mitigation should not be required.
Page 7 of 8
XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level. Proposed final impervious surface
calculations are 29.97% of the 20.48 acre site. These calculations are included. Wet pond
and level spreader calculations by the project engineer (Withers & Ravenel) are attached.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
Treatment will occur within an existing municipal waste water treatment system.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
Is this an after-the-fact permit application? Yes E] No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes El
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:
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
1
4 L,
k ? Gk Z2 ot)
,
Applicant/Agent's Signature D to
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 8 of 8
Of/07/05 11:27 FAX [phone] PRESTON DEVELOPMENT CO.
01/07/2005 08:57 FAX
[a 002
121002
Soil &: Environmental Consultants, PA
11010 Raven Bulge Road • Raleigh. North Carolina 27614 - Phone: [phone] - Pax: [phone]
www.sandp-c.com
AGENT AUIHOR1ZATXON FORM
All Blank, To Be Filled In By The Current Landowner
Name: ov 1 AlV "i'f 5 l-- C-,
Address: 100 V**- A) 1!if-A bk5 cl" N c- z-7 513
Phone: ql q ' `°? i 3?0
?,?SS t Q?O h 5v(? ?I ?1 5l 0?J
Project Name/ Description:
Date: 1 ' 77
The Depariment of the Army
U.S. A xny Corps of Engineers, Wdlmington District
P-a. Box 1890
Wilmington, NC 26402
Attn: 41Q1-:-1 --J- r Ile-, 4e
e
Field Office: n'
Re: Wetlands Related Consulting and.Pemutting
To Whom It May Concern:
I, the current property owner, hereby designate and authorize Soil & Environmental Consultants, PA to
act in my behalf as my agent m the processing of permit applicationg, to furnish upon request
supplemental information in support of applications, etc. from this day forward. The '7 Tl:J?: day of
'S.,b?i.v vo
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE This authorization, for liability and professional courtesy reasons, is valid only for
government of€itdals to enter the property when accompanied by S&EC staff. You should call S&EC
to arrange a site meeting. prior to visiting the site.
--r-l)%4 %a{rte
Print Property Owner's Name
cc: Mr. John Domey
NCDENR - DWQ
2321 Crabtree Boulevard
Raleigh, NC 27604
? X75
Property own s lgnature a V S t 4V Cale
cc: Mr. Kevin C- Martin
Soil & Environmental Consulta nts, PA
Grcensboro OffioG:
236 LtPbillip Court, Suite C 3817-E Lawndale Drive
Concord. NC 28025 Greensboro, NC 27455
Phonu• [phone] Phone:. [phone]
Fax: [phone]
Fav• (11141720-9406
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Project #: Scale:
7841 1":2000'
Project Date:
Mgr.: KM 01-04-05

Figure 1- USGS
Cary Quad
Chessington Subdivision
Morrisville, Wake County, NC
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] • [phone]
Web Page: www.SandEC.com
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Project #:
7841
Project Date:
Mgr.: KM 014405
Figure 2 - Wake County
Soils Map - Sheet 36
Chessington Subdivision
Morrisville, Wake County, NC
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] - [phone]
Web Page: www.SandEC.com
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WETLAND IMPACT SUMMARY TABLE
AREA IMPACTED AREA SHEET
A 3,494 SF 1
B 12,041 SF 2
C N/A 3
D 4,092 SF 4
TOTAL IMPACTED AREA: 19,627 SF (0.45 AC)
Ir?'?* x;11 0 ..2?1 u<-
BUFFER IMPACT SUMMARY TABLE
AREA IMPACTED AREA (ZONE 2) SHEET
A 5,288 SF 1
B 2,280 SF 2
C 1,117SF 3
D NA 4
ZONE2
TOTAL IMPACTED AREA: 8,685 SF (020 AC)
1? I
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GRAPHIC SCALE
200 0 100 200 400
WITHERS RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
11 MocKenon Drive Cory, North Carolina 27511 tel: [phone] fox: 919-467-6008 arw.vlthertrovenel.tom I inch - 200 ft.
50., ..
A20' WIDE DRAIN /E
-
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15' OPE ENCROACHM NT
, i
I N T \UFFER
X 49
36" RCP ?* 4?/?\? \\
WETLAND IMPACTS
' 3,494 SF (0.08 AC) \
{\
BUFFER IMPACTS (ZONE 2) \ \ :?\ `\ \\ \ ?1 \
5,288 SF (0.12 AC)
47 \ \ \
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(4 6)
AREA "All
WITHERS & RAVENEL (SHEET 1)
ENGINEERS 1 PLANNERS I SURVEYORS
11 MocKenan Drive Cary, North Coralino 27511 tel: [phone] fax: [phone] wwr.althersrovenel.com
GRAPHIC SCALE
50 0 25 50 100
1 inch - 50 ft.
,? ILL

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BUFFER IMPACT (ZONE 2) WETLANDS IMPACT
2 280 SF - - -... _

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G INT(-Y BUr?:EER ?\ I I \ \ ( \?

(0.05 AC) 12,041 SF (0.28 AC)
AREA "B"
GRAPHIC SCALE
WITHERS RAV E N E L (SHEET 2) 50 0 25 50 100
ENGINEERS 1 PLANNERS 1 SURVEYORS
II MocKenan Drive Cary, North Carolina 27511 W:919-469-3340 fox: 919-467-6008 www.withersravenel.com 1 inch - 50 ft.
-N-
P

BUFFER ROACT (ZONE 2)
1,117 SF (0.03 AC)
WITHERS & RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
I I MocNenan Drive Cary, North Corolino 27511 tel: [phone] lax: 919-467-6008 www.withersrovenel.com
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(SHEET 3)
1 inch - 50 ft.
O
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1V,
WETLANDSIMPACT
4,092 SF (0.09 AC)
WITHERS & RAVENEL
ENGINEERS I PLANNERS 1 SURVEYORS
I I MacKenan Drive Cary, North Carolina 27511 lel: 919-469-3340 lax: 919-467-6008 www.withersravenelcom
AREA T" GRAPHIC SCALE
50 0 25 50 100
(SHEET 4)
IMMMInmin-- .1
1 inch - 50 ft.
North Carolina Division of Water Quality - Stream Identification Form; Version 3.1
Date: 710 5- Project: 7?3qE Latitude:
Evaluator. S Site:
ongitude:
Nil
Total Points: Other
Stream is at least l Ifermlltent County: e. Quad Name:
i/2 19 or perennial WMIC 9•

A. Geomorphology Subtotal= Absent ' Weak.. Moderate: Strong
1'. Continuous bed and bank 0 { 1 2. 3
2. Sinuosity 0 i 1 -- 2-- 3

3. In channel structure: riffle pool sequence
0
-
L
`
2 -
3
4. Soil texture or stream substrate sorting p - I -
j -
p - -
3

5. Active/relic floodplain

0 -

1 --?
-gi
,
i 2
Z
--
3

6. Depositional bars or benches
---

'

' -_ , _.-
2 -
3
7. Braided channel
8. Recent alluvial deposits -
M,
0 - i
1 i - 2 - - 3
3-
?
9' Natural levees 2
---- - - 3

10. Headcuts
-
'p :;
--
-
1
--
-T 2'
--
- -

-
3_ _

-
11. Grade controls
_ '0' 0.5 ,
1 1.5 1

12. Natural valley or drainagewa
0 -i-
( 0.5 ---------
j 1
1.5 -1
13. Second or greater order channel on existing i
USGS or NRCS map or other documented No = 0? Yes = 3
evidence,
a. i
B. Hvdroloov (Subtotal = (6 1
14. Groundwater flow/discharge -- p ;r -{- 1--? 2
15. Water in channel and > 48 hrs since rain, or

Water in channel - dry or rowin season -

`0 _

1

1 2-
-- +
--
3 1
16. Leaflitter 0.5 0
17. Sediment on ants or debris - 0 1 1.5
18. Organic debris lines or piles (Wrack lines) 0 076 1 1,5
19. Hydric soils (redoximorphic features) present? - No = 0 Yes = 1.5 {
C. Bioloov (Subtotal = (n 1
20'. Fibrous roots in channel r--2-?-? --
i 0 -
21*. Rooted plants in channel 2
-22. Crayfish
---
--
23. Bivalves
24. Fish -' -- - 1 1 r 2
- 0.5 -- 1 - 3 -
1.5
25. Amphibians 60. I 0.5
1
-- - 1.5
26. Macrobenthos (rote diversity and abundance) _
0.5 1 1.5
27. Filamentous algae; periphyton I-- 1 I 2 3
28. Iron oxidizing bacteria/fungus,
a
' 0 ' I 0.5 _1_ L5 ----l
29
. etl
nd plants in streambed FAC = 0.5; FACW = 0.75; OBL = 1.5 SAV = 2.0; Other = 0
-im cv am 4j locus on ale presence or upland plants, item 29 focuses on the presence of aquatic or wetland plants.
Notes: (use back side of this form for additional notes.) Sketch:
Ecomtem
f - a :;
PROGRAM
June 15, 2005
Kevin Martin
Soil & Environmental Consultants, PA
11010 Raven Ridge Road
Raleigh, NC 27614
Project: Chessington Subdivision County: Wake
The purpose of this letter is to notify you that the North Carolina Ecosystem Enhancement Program (NC EEP) is willing to
accept payment for impacts associated with the above referenced project. Please note that this decision does not assure that
the payment will be approved by the permit issuing agencies as mitigation for project impacts. It is the responsibility of the
applicant to contact these agencies to determine if payment to the NC EEP will be approved.
This acceptance is valid for six months from the date of this letter. If we have not received a copy of the issued 404
Permit/401 Certification within this time frame, this acceptance will expire. It is the applicant's responsibility to send
copies of the 404/401/CAMA permits to NC EEP. Once NC EEP receives a copy of the 404 Permit and/or the 401
Certification an invoice will be issued and payment must be made.
Based on the information supplied by you the impacts that will be mitigated are summarized in the following table.
River Basin Wetlands Stream Buffer Buffer
Cataloging (Acres) (Linear Feet) Zone 1 Zone 2
Unit (Sq. Ft.) (Sq. Ft.)
Riparian Non-Riparian Coastal Marsh Cold Cool Warm
Neuse 0.45 0 0 0 0 0 0 0
03020201
Upon receipt of payment, EEP will take responsibility for providing the compensatory mitigation for the permitted impacts
up to a 2:1 ratio, (buffers, Zone 1 at a 3:1 ratio and Zone 2 at a 1.5:1 ratio). The magnitude of the compensatory mitigation
will be as specified in the Section 404 Permit and/or 401 Water Quality Certification, and/or CAMA Permit. The mitigation
will be performed in accordance with the Memorandum of Understanding between the N. C. Department of Environment and
Natural Resources and the U. S. Army Corps of Engineers dated November 4, 1998.
If you have any questions or need additional information, please contact Carol Shaw at [phone].
3lincerely,
rely'iam D. Gilmore PE
Director
cc: Cyndi Karoly, Wetlands/401 Unit
Andrea Wade, USACOE - Raleigh
Eric Kulz, DWQ Regional Office - Raleigh
File
Restorutg... E"A"..- Protet;taj?j OUP- Stag
MENR
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 91 9-71 5-0476 / www.nceep.net
s

?BMP
PROPOSED BMP
LOCATION
2
n
ITHERS
CHESSINGTON BMP DRAINAGE AREA W &- RaVENEL -?-
Y __ - U?Itfl[!i 1 ?IMIItU 1 lYf1Yt?ORf 1
1 ,
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Aen -l. / > =.? _ ?. - 0.67 A °`'•?,_.
..ult. u.,o --?'.?- • h'/
4, 1
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4 (•
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2733'36' 346.06
-? CHESSINGTON OVERALL DRAINAGE MAP 'ITHBR9 RAVBNEL
?? n u w lltlttlu 1 ttAl
MURRISVILLE WAKE COUNTY NORTH GRULINAF
...•«...-? ?
DWQ Project
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name: _ rhnccinaon
Contact Person: Adam A zEbaush Phone-Number. [phone]
Level Spreader ID:,
Level Spreader Length 13 It. (perpendicular to flow)
Drainage Area 14-7 ac. (on-site and off-site drainage to the level spreader)
Impervious Area 562 ac. (on-site and off-site drainage to the level spreader)
Maximum Filter Sbip Mer Slope 5 % (6% for forested, leaf littler cover, 8% for thick ground cover)'
grass
Max. Discharge from a 10 Year Storm 0.18 ds
Max. Discharge to Level Spreader 0.18 ds
Filter Strip/Buffer Vegetation Grass (thick ground cover or grass, canopied forest with leaf fitter
groundcover)
Pre-treatment or Bypass Method Pretreatment-Wet Pond
11! REQUIRED ITEMS CHECKLIST
Initial in the space provided W k4cate the following design requirements have been met and supporting documentation is attached. If a
requ/rement has not been met; attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a My executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
AA Level spreader is at least 13 It. per cis for thick ground cover or grass or 100 ft per ds in canopied forest with leaf
fitter.
X / A Pre-Form Scour Holes are on flat slopes only
A A No structures ate located in protected buffers'
If bypass method specified in the Draft Level Spreader Design Option Document:
N/A Bypass method is specified (dappficable) and plan details and calculations are provided
'N /A Discharge to level spreader and subsequent filter strip.is hydraulically and spatially separate from the bypass
discharge.
NIA No structures are located in protected buffers.
N/A Plan details for the bypass and outlets are provided.
N/A ' The operation and maintenance agreement includes annual erosion and vegetation repair.
N/A The operation and maintenance agreement signed and notarized by the responsible party is provided.
Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf fittler cover or on slopes of up to 25% in areas
with thick ground cover or grass if designed according to the !raft Level Spreader Design Option Document. This potentially requires a
minor variance in protected buffer areas. In any event the second level spreader cannot be located in Zone 1 of a protected buffer area.
Project No. DWO (to be prvvik'd by Uhq
DMSION OF WATER QUALITY - 441 WET DETE TION BASIN WORKSHEET
DWO Stormwater Management Plan Review.
L PROJECT MORMATtON (please complete the fogowatg inhi'Ma6w):
ProjedName: Me inntnn
Contact Person Adh6 A.bbatr$h_ Ph" Number.
For projects wdh muffiple basins, specify which basin this mrkshee(appFies b:
Basin Bottom Elevation
Permanent Proof Elevation
Temporary Pod Elevation
Permanent Pod Suface Area
Drainage Area
knpwAous Area
Permanent Pod Vokrne
Temporary Pool V&m
Forebay V*me
SAAM rued
DiianxAar of Orifice
IL REQUIRM ITEMS CHECKLIST
N3_0 it (average eleraron of the boor of the basin)
356, It. (&Va6m of the orifice imred out)
357.55 ft (elevation of the outlet strUdure invert in)
12545 sq. R (water surface area at permarrer# pod eleva`609)
14 . .7 ac. (on-sit; and 0,ae drainage b tie basin)
5+ 6 9 ac. (one and oft-site drainage to the basin)
21000 Gr. R (combined vokm of main basin and faebay)
21432 cu. R (wkrne detained on top of the permanent po0Q
«r. fL
i.66 (aurMo-. area b drainage anent ratio)
2 in. (draw down orifice diameter)
The following dvcklist or Mes design requirements per the Mm w ter Best Management Plracfices Manual. ktrU in ire space
provided b irrdirr* the folo%wV design mquimnxxts have been met and a"xrfing docurxxtta6 is atladted. Ya roqurne ned has
not boon mot; adxh an e*b born o(My. At a mk irnunt a complaie sbrmwater mana6em t plan submlfal roulades a wodahoet for
each BW design edia4a6ons, plans and specifications showing aN M's and outlet stud re details, a detailed drainage plan and a
MY ezsarted operation and mwi(enance agreement. An how pMe scrbrrittal padcage YA result in a request fa adds ad information
and welt a bsbff* delay final review arid approval of the project
is ri?
AA, The bmporarypod =*cis runoff from the 1 inch storm event.
The basin IenA b widtlr ratio is greater Clan 3.1.
A A The basin side slopes am no steeper than 3.1.
9PP Note A submerged and vegetated perimeter surf of kess Im 6:1 is provided.
AA Vegetation to the permanent pod devaGon is specked.
AA An emeWicy drain is provided b drain the basin.
AA The pamai-a t pod depth is W*een 3 and 6 W (mgrwed minimum of 3 feet).
o
5
days,
Th
e teff"rary pod draws down in 2 t
n
S
Pe Na -e ?
µ { / a1J{? ? y
p
ry
?
7 I I e brebay wkxm is apvhn-d* equal to 20N of YIG basin tVkKw.
AA Sedriwed storage is provided in the permanent pod
AA Access is provided for maintenance.
AA A notarized site speafic operation and maan(anance (0dM) plan is provided.
AA A valet" managemeWhiowing sd)edule is provided in the O&M plan.
AA Serrtiarxrual inspacfi= are speafied in the OEM plan.
AA A debris dtatc is spanked in tune O&M plan b be performed after every slam event.
AA A spoCk sediment dean-od berdirnadc is Tisted (elevation or depth) in O&M plan.
AA A resporrsr k party is designated in the O&M plan.
NOTE: Submerged perimeter shelf and forebay to be installed by
Contractor during construction.
WITHERS RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
CHESSINGTON SUBDIVISION
IMPERVIOUS AREA CALCULATIONS
• Total Project Area = 20.48 Ac ....................................................... (892,109 Sq. ft.)
Impervious Areas
• Roadways - 2747 LF ................................................................. (91,481 Sq. ft.)
• Sidewalk - 5' wide, both sides .................................................. (15,717 Sq. ft.)
• Lot Areas - 2390 typ. building footprint x 56 lots .................... (133,840 Sq. ft.)
4' wide conc. walk x 20' long x 56 lots .................. (4,480 Sq. ft.)
Driveways, 390 sf x 56 lots ................................. (21,840 Sq. ft.)
Total Impervious area = 267,358 Sq. ft.
Total Project Impervious Percentage = 29.97%
Withers & Ravenel, Inc.
Project No. 203012.0
Aug. 1, 2004
111 MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenet.com
Project
GH65s1NG Project No.
20:Wz . O
'WITHERS & RAVENEL
ENGINEERS I PLANNERS I SURVEYORS Subject U?t 'u ??.-yH? '
II„rY'???YJ • ?
Date t ( ?
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iii MacKenan Drive ICarv. North Carolina 27511 I teL919.46q.RR40 I faX:[phone]oo8 I www.withersravenel.com
OVIL a C11VIIAVRIVIC" IML %'V11q.7YLINIY 1.71 Ch
NC Division of Water Quality
Tran # invoice Type Date Reference
7289 0623051 Invoice 06/23/05 7841.W0
051132
Check Number
Date: 06/23/05 Check Furst:
Balance Discount
$475.00 $0.00
P. - P-1 0 w P= Dp
JUN 2 3 2005
DENR - NA'fER QUALITY
WETLANDS AND STORMWATER BRANCH
017653
17653
$475.00
Pay Amount
$475.00
1' MIN, FREEBOARD
WATER LEVEL DURING STORM TOP OF DAM ELEV = 360.5
~ ~ \
- 1= _ -I - - _I I I_I - I ~ I
~ T ~ ~ q 2 ~ ~ ~ ~~~Iit -t I ~=1 I - WATER QUALITY POOL - -
' =III=III= _ _ -
' I I =1I ~ 1= MINIMUM SLOPE 3 : 1
I -III=III= _ PERMANENT POUL = I - ~=1 I I =III=~ _ I
ATTACH I i _I I = ~ - ~ EARTH DAM
~ ( ~ ~~z, gACK~ERa~~EN ~iri R I~ TEMPORARY = I1= -I I i-~ 1= SKIMMER I L-_I I I= III=~ - 1=i ' ~ DIS5IPATOR PAD
C
' I I=1 =1 I I=1 I I=1 I I=1 11= 1= - =1 I I III-1I I=1I1= "'-I I ,III-1I I-= _
ANTI-FLOATATION DEVICE ~ I' III-I ~ I= ~ I=1 ~
-III-111= I I==
" -III=III= ANTI-SEEP COLLAR ~ ~=1 I I_I ~ I=I ~ , -
' .III -1 11.=1I ~=I I1=
OUTLET PIPE
MANE~lT BMP DETAIL TYPICAL PER
~ \ ~ NT
DIMENSIONS ELEV.
~ 12 545 SF 356.0
NORMAL POOL ,
TOP OF DAM WIDTH 8' 360.5 _
~I ~ ~ I I' ~ ~ 1 ~I I ~ ~ If ST?iL AR6RESIT~ - 5'x5' NA ANTI SEEP COLIAR
PERMANENT POOL ORIFICE 2" 356.0
\1~ ± b I~ ~ ~ ~ ~ I I~, sD ~F az c u'- i J I ~ ~ ~ is s a`zEO) - 'x 5'x 2.5' 352.5 TOP OF ANTI FLOATATION 5 _
7' x 7' BOX 358.95
II I. a~POUrr~ErPiP~ i -p_~ TOP OF RISER
IV II I ,4, i I I II, , ~ \ \ \ " R P 353.0 OUTLET PIPE ~ BOX 36 C
I I II F, II III I ~ ° ,,'ii ~ ~ ~ ''i F 36" RCP 352,5 OUTLET PIPE ®OUT ALL
^i ~ WQ POOL 357.55
ICI ~ Iii I ~I I ~ I ~I ' I - 359.88 100 YR PEAK ELEV
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E V
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6" °RECAST SLAB
4" DIP VENT PIPE W/ GRATE
6" BLOCK
VOID SPACE
358.95
i i ~ 4' WIDE x 6" TALL
~ ~1 ORIFICE (ON 2 SIDES)
~ i ,.I i i WATER QUALITY POOL 357.55
'0-RING' JOINT
NOTE: 7'X7'
PLACE STEM SUPPORTS PRECAST BDX
AT 3' FROM BASE „ 4 x4 TEE
PERMANENT POOL 356.DD ~JJ GROUT EACH SIDE
2 ORIFICE OUTLET e~
4" DIP JOINT SEALED WITH A-LOCK NEOPREN
\ i d GASKET CAST IN MANHOLE WALL
6" NRS GATE VALVE ~
. I '0-RING' GASKETED r,~n
\ ~
~ ~ DRAW DOWN OUTLET
ti / / / /
~ ~ ~ ~ \~r\ PAVED INVERT g^ ~ ~ ~ ~
/ / / / / \ ~ ~ ~ ~ . GROUT o \
/ • a 4" DIP TO LEVEL SPREADER
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-
NTS
~ \ ~ ~x \ /
~4 REBAR 12"
- - ~ O.C, EACH WAY 1/2" PREFORMED J41Ni
FILLER, 12" WIDE
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B"
ELEVATION SECTION
2000 PSF MIN,
BEARING CAPACITY SEE BNP SECTION FOR SIZGJG DATA
BENEATH COLLAR
TYPICAL ANTI-SEEP COLLAR
NTS
4 Tr h ~ t' .6 i<'.
BMP#6 (WET POND)
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Designer Scale Sheet Na,-~`-
No. Revision Date B t W&R AS NOTED
Date Drawn By STORN FORMWATER MANAGEMENT PLAN WITHERS& RAVEN'EL ENGINEERS I PLANNERS I SURVEYORS 12
LMT 2-17-os CHESSINGTON SUBDIVISION RRISVILLE N.C.
Checked By job No. MO , 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.wkFAmmenel.com
AA 203012