20050819 Ver 1_COMPLETE FILE_20050509

s ,
Soil& Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com '
Division of Water Quality
Attn: Ian McMillan / Cyndi Karoly
2321 Crabtree Boulevard
Suite 250
Raleigh, NC 27604
March 21, 2006
S&EC Project # 1089.w3
0 aW ject # 20050819
Q -D
MAR 2 1 2006
DENR - WATI:h U- -AL1 ! It
`VYEn A W APIA Sitlr gyyATFR OPANCH
Re: Request for correction of the Amberly PUD MF-2 & MF-2a individual 401-permit
Amberly Subdivision
Wake County, North Carolina
Dear Mr. McMillan and Ms. Karoly:
After speaking with Mr. Todd Tugwell of the USACE, it was discovered that there was
an error on the 401 previously issued on 10-21-05 (a copy of the first two pages are
attached) that reflected an error on the public notice issued by the USACE. The public
notice (a copy of the first two pages are,attached) correctly listed the individual
intermittent stream impact totals as 292 LF, 50 LF, and 77 LF, but incorrectly totaled
them as 374 LF. The correct total should be 419 LF of intermittent stream channel. We
therefore request that a revised 401 be issued that replaces the 374 LF on page 2 with 419
LF.
Please call or email me if you have any questions or require. further explanation.
Sincerely,
Sean Clark
Attachments: 1) Copy of the first two pages of the 10-21-05 issued 401-permit
2) Copy of the first two pages of the USACE 05-06-05 Public Notice

Charlotte Office: Greensboro Office:
236 LePhillip Court, Suite C 3817-E Llawndale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
OF WA
TF QG Michael F. Easley, Governor
y William G. Ross Jr., Secretary
COW
North Carolina Department of Environment and Natural Resources
>
O 'C Alan W. Klimek, P.E. Director
Division of Water Quality
September 21, 2005
I
Mr. Pete Sullivan U i7 vC`P 2
KB Home Raleigh-Durham, LLC tJ
1100 Navahoe Drive
Raleigh, NC, 27609 By: Soil & Environmental Consulta: jA.
Re: . Amberly PUD MF-2 & MF-2a in Wake County
DOA Action ID200520751, DWQ Project No.20050819
APPROVAL of 401 Water Quality Certification
Dear Mr. Sullivan:
Attached hereto is a copy of Certification No. 3353 issued to Mr. Pete Sullivan of KB Home Raleigh-
Durham, LLC, dated September 21, 2005. In addition, you should get any other federal, state or local
permits before you go ahead with your project including (but not limited to) Solid Waste, Sediment and
Erosion Control, Stormwater, Dam Safety, Non-discharge and Water Supply Watershed regulations.
Please note that since the U.S. Army Corps of Engineers intends to consider the two Amberly phases
Amberly PUD MF-2 & MF-2a and Sandler at Amberly together as a separate and complete project (note
that two different owners are involved), the Division will also consider these two phases as portions of a
larger single project.
If we can be of further assistance, do not hesitate to contact us.
Sincerely,
Al W. Klimek, P.E.
AWK/cbk
Attachments: Certificate of Completion
cc: Todd Tugwell, U.S. Army Corps of Engineers, Raleigh Regulatory Field Office
Wilmington District, USACOE
Eric Kulz, DWQ, Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Sean Clark, S&EC, 11010 Raven Ridge Road, Raleigh, NC, 27614
Don Sever/Debbi Ferm, Chas H. Sells, 15401 Weston Parkway, Suite 100, Cary, NC, 27513
Filename: 050819Amberly(Wake)401
401 Oversi ht/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX 919-7&3-6893 / Internet: htto.//h2o.enr.state.nc.us/ncwetlands
o
' a
qhCu
tarAn Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper

Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC
Mr. Pete Sullivan
Page 2 of 4
September 21, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 2H, Section.0500 to Mr. Pete Sullivan of KB Home Raleigh-Durham, LLC to fill
374 feet of intermittent stream channel and to convert a 1.717 acre farm pond into a non jurisdictional
stormwater retention pond in the Cape Fear River Basin, associated with the construction of the Amberly
PUD MF-2 & MF-2a subdivision in Wake County, North Carolina, pursuant to an application filed on the
6th day of May of 2005, and in additional correspondence received July 26, 2005.
The application and supporting documentation provides adequate assurance that the proposed work will
not result in a violation of applicable Vater Quality Standards and discharge guidelines. Therefore, the
State of North Carolina certifies that this activity will not violate the applicable portions of Sections 301,
302, 303, 306, 307 of PL 92-500 and PL 95-217 if conducted in accordance with the application, the
supporting documentation, and conditions hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and as
described in the Public Notice. If the project is changed, prior to notification a new application for a new
Certification is required. If the property is sold, the new owner must be given a copy of the Certification
and approval letter and is thereby responsible for complying with all conditions of this Certification. Any
new owner must notify the Division and request the Certification be issued in their name. Should wetland
or stream fill be requested in the future, additional compensatory mitigation may be required as described
in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site plan result in a
change in stream or wetland impact or an increase in impervious surfaces, the DWQ shall be notified in
writing and a new application for 401 Certification may be required. For this approval to be valid,
compliance with the conditions listed below is required.
Conditions of Certification:
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 374 feet Public Notice, Areas A, B & C
Waters 1.717 acres Public Notice, Area D
Sediment and Erosion Control:
2. 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:
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
1 1
US Army Corps PUBLIC NOTICE
Of Engineers
Wilmington District
Issue Date: May 6, 2005
Comment Deadline: June 6, 2005
Corps Action ID #: 200520751
All interested parties are herby advised that the Wilmington District, Corps of Engineers
(Corps) has received an application for work within jurisdictional waters of the United
States. Specific plans and location information are described below and shown on the
attached plans. This Public Notice and all attached plans are also available on the
Wilmington District Web Site at www.saw.usace.army.mil/wetlands
Applicant: KB Home Raleigh - Durham, LLC
Attn: Mr. Pete Sullivan
1100 Navahoe Drive
Raleigh, North Carolina 27609
Agent: Soil & Environmental Consultants, Inc.
Attn: Mr. Sean Clark
11010 Raven Ridge Road
Raleigh, North Carolina 27614
Authority
The Corps will evaluate this application and a decide whether to issue, conditionally
issue, or deny the proposed work pursuant to the applicable procedures of Section 404 of
the Clean Water Act.
Location
The project is approximately 90 acres in size and is located to the north and west of the
intersection of Yates Store Road and north of Carpenter Fire Station Road, east of
Panther Creek, in Cary, Wake County, North Carolina. Coordinates (in decimal degrees)
for the site are 35.8240 'North, 78.9145 ° West. The site contains tributaries of Panther
Creek and Morris Branch, and adjacent wetlands, in the Cape Fear River Basin. The
project, identified as parcels MF-2 and MF-2A, are located within the Amberly Planned
Unit Development (PUD).
i , MAY 0 9 2005
II viJi
Existing Site Conditions
The site is located in a rapidly developing rural setting. Numerous new residential
developments are located near the proposed project. A sewer pump station and sanitary
sewer trunk lines have recently been constructed near the site to provide sewer service to
the vicinity. Currently, the site is made up of abandoned agricultural fields and
forestland. Several tributaries to Panther Creek and Nancy Branch and two farm ponds
are also located on the property. Grading operations have commenced on high ground
portions of the site.
Applicant's Stated Purpose
As stated by the applicant, the purpose of the project is to provide additional housing for
the growing Cary area. The development will contain,both.single-family. and multi -
family residential.areas.
Project Description
The project is a residential development that will include construction of single and
multi-family units. Development of the site will require extensive clearing, grading,
excavation, and fill necessary for the construction of homes, lots, roads, stormwater
facilities, and infrastructure. Heavy equipment, including graders, pan scrapers,
excavators, bull dozers, etc. will be used for the construction of the project. Proposed
impacts to waters of the U.S. total 374 linear feet (0.0432 acre) of intermittent stream
channel resulting from the placement of fill material, culverts, and/or riprap. The impacts
are proposed in three separate locations as follows: a) 292 linear feet of intermittent
stream channel for the construction of a road and lots; b) 50 linear feet of intermittent
stream channel for the construction of a greenway trail; and c) 77 linear feet of
intermittent stream channel for the construction of lots. Development plans also call for
the conversion of a 1.717-acre farm pond into a non jurisdictional stormwater retention
pond. No direct impacts will result from this conversion, however the work will result in
the permanent loss of 1.717 acres of open waters of the U.S. as the resulting pond will no
longer be subject to Section 404 of the Clean Water Act. The applicant has not proposed
mitigation for the proposed impacts associated with the development. Plans included
with this notice that show the overall proposed site layout as well as the details for impact
areas a, b, and c.
Development plans for an additional parcel of Amberly PUD, identified as Amberly AR,
were submitted by Sandler At Amberly, LLC and are currently under review. Plans for
Amberly AR will be distributed by public notice (Corps Action ID M 200520319)
following submittal of a complete application, and they will be available on the
Wilmington District Web Site at www.saw.usace.army.mil/wetlands. Impacts associated
with Amberly AR and with the current proposal will be reviewed as a single and
complete project for the purposes of the Corps permit evaluation procedures.
2
`O?OF vv H r -RPG
D ii? `C
Mr. Pete Sullivan
KB Home Raleigh - Durham, LLC
1100 Navahoe Drive
Raleigh, NC, 27609
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
March 21, 2006
Re: Amberly PUD MF-2 & MF-2a in Wake County
DOA Action ID20052075I, DWQ Project No.20050819
APPROVAL of 401 Water Quality Certification - REVISED
Dear Mr. Sullivan:
Attached hereto is a copy of Certification No. 3353 issued to Mr. Pete Sullivan of KB Home Raleigh-
Durham, LLC, dated March 21, 2006. This Certification replaces the Certification issued to you on
September 21, 2005. In addition, you should get any other federal, state or local permits before you go
ahead with your project including (but not limited to) Solid Waste, Sediment and Erosion Control,
Stormwater, Dam Safety, Non-discharge and Water Supply Watershed regulations. Please note that since
the U.S. Army Corps of Engineers intends to consider the two Amberly phases Amberly PUD MF-2 &
MF-2a and Sandler at Amberly together as a separate and complete project (note that two different
owners are involved), the Division will also consider these two phases as portions of a larger single
project.
If we can be of further assistance, do not hesitate to contact us.
AWK/cbk
Attachments: Certificate of Completion
S c y
ime .E.
1
cc: Todd Tugwell, U.S. Army Corps of Engineers, Raleigh Regulatory Field Office
Wilmington District, USACOE
Eric Kulz, DWQ, Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Sean Clark, S&EC, 11010 Raven Ridge Road, Raleigh, NC, 27614
Don Sever/Debbi Fenn, Chas H. Sells, 15401 Weston Parkway, Suite 100, Cary, NC, 27513
Filename: 050819Amberly(Wake)401 revised
One
th ly
NQ{
401 Oversight/Express Review Permits Unit afura uCQ!!
1650 Mail Service Center, Raleigh, North Carolina 27699.1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: htto://h2o.enr.state.nc.us/ncwetlands
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC,
Mr. Pete Sullivan
Page 2 of 4
March 21, 2006
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 2H, Section.0500 to Mr. Pete Sullivan of KB Home Raleigh-Durham, LLC to fill
374 feet of intermittent stream channel and to convert a 1.717 acre farm pond into a non jurisdictional
stormwater retention pond in the Cape Fear River Basin, associated with the construction of the Amberly
PUD MF-2 & MF-2a subdivision in Wake County, North Carolina, pursuant to an application filed on the
6th day of May of 2005, and in additional correspondence received July 26, 2005.
The application and supporting documentation provides adequate assurance that the proposed work will
not result in a violation of applicable Water Quality Standards and discharge guidelines. Therefore, the
State of North Carolina certifies that this activity will not violate the applicable portions of Sections 301,
302, 303, 306, 307 of PL 92-500 and PL 95-217 if conducted in accordance with the application, the
supporting documentation, and conditions hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and as
described in the Public Notice. If the project is changed, prior to notification a new application for a new
Certification is required. If the property is sold, the new owner must be given a copy of the Certification
and approval letter and is thereby responsible for complying with all conditions of this Certification. Any
new owner must notify the Division and request the Certification be issued in their name. Should wetland
or stream fill be requested in the future, additional compensatory mitigation may be required as described
in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site plan result in a
change in stream or wetland impact or an increase in impervious surfaces, the DWQ shall be notified in
writing and a new application for 401 Certification may be required. For this approval to be valid,
compliance with the conditions listed below is required.
Conditions of Certification:
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 (Units) Plan Location or Reference
Stream 419 feet Public Notice, Areas A, B & C
Waters 1.717 (acres) Public Notice, Area D
Sediment and Erosion Control:
2. 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:
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
• uuvwt? ? vv ?.u c. w a•as -s. w, ?w ..V-V &%"AV ISLA-" L" 14"111, _,_v
Mr. Pete Sullivan
Page 3 of 4
March 21, 2006
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.
c. For borrow pit sites, the erosion and sediment control measures must be designed, installed,
operated, and maintained in accordance with the most recent version of the North Carolina
Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. 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 404/401 Permit Application. 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. 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;
Continuing Compliance:
5. Mr. Pete Sullivan and KB Home Raleigh-Durham, LLC, shall conduct construction activities in a
manner consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate requirements
of State law and federal law. If the Division determines that such standards or laws are not being
met (including the failure to sustain a designated or achieved use) or that State or federal law is
being violated, or that further conditions are necessary to assure compliance, the Division may
reevaluate and modify this Certification to include conditions appropriate to assure compliance
with such standards and requirements in accordance with 15A NCAC 2H.0507(d). Before
modifying the Certification, the Division shall notify Mr. Pete Sullivan and/or KB Home Raleigh-
Durham, LLC and the US Army Corps of Engineers, provide public notice in accordance with
15A NCAC 2H.0503 and provide opportunity for public hearing in accordance with 15A NCAC
2H.0504. Any new or revised conditions shall be provided to Mr. Pete Sullivan of KB Home
Raleigh-Durham, LLC in writing, shall be provided to the United States Army Corps of
Engineers for reference in any Permit issued pursuant to Section 404 of the Clean Water Act, and
shall also become conditions of the 404 Permit for the project;
Road Crossings:
7. Culvert Installation
Culverts required for this project shall be installed in such a manner that the original stream profiles
are not altered. Existing stream dimensions (including the cross section dimensions, pattern, and
longitudinal profile) must be maintained above and below locations of each culvert. Culverts shall
be designed and installed to allow for aquatic life movement as well as to prevent head cutting of
the streams. If any of the existing pipes are or become perched, the appropriate stream grade shall
be re-established or, if the pipes installed in a perched manner, the pipes shall be removed and re-
installed correctly.
Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC
Mr. Pete Sullivan
Page 4 of 4
March 21, 2006
The establishment of native, woody vegetation and other soft stream bank stabilization techniques
must be used where practicable instead of rip rap or other bank hardening methods. If rip-rap is
necessary, it shall not be placed in the stream bed, unless specifically approved by the Division of
Water Quality.
Installation of culverts in wetlands must ensure continuity of water movement and be designed to
adequately accommodate high water or flood conditions.
Other conditions:
6. Certificate of Completion
Upon completion of the project, the Applicant shall complete and return the enclosed "Certificate of
Completion" form to notify NCDWQ when all work included in the §401 Certification has been
completed. The responsible party shall complete the attached form and return it to the
401/Wetlands Unit of the NC Division of Water Quality upon completion of the project. Please
send photographs upstream and downstream of each culvert site to document correct installation
along with the Certificate of Completion form.
7. 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/ncwetiands. The text of the sample deed notification may be modified
as appropriate to suit to this project.
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.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon written
request within sixty (60) days following receipt of this Certification. This request must be in the form of a
written petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. If
modifications are made to an original Certification, you have the right to an adjudicatory hearing on the
modifications upon written request within sixty (60) days following receipt of the Certification. Unless
such demands are made, this Certification shall be final and binding.
This the 21st day of March 2006
DIVISION OF WATER QUALITY
AWK/cbk/?m
Klim , E.
Pi
Amberly 401-permit correction request (DWQ Project #20050819)
Subject: Amberly 401-permit correction request (DWQ Project #20050819)
From: "Sean Clark" <[e-mail]>
Date: Tue, 21 Mar 2006 10:40:01 -0500
To: <[e-mail]>
Ian
After speaking with Todd Tugwell in reference to the 404, it was
discovered that there was an error on the 401 previously issued on
10-21-05 (a copy of the first two pages are attached) that reflected an
error on the public notice issued by the USACE. The public notice (a
copy of the first two pages are attached) correctly listed the
individual intermittent stream impact totals as 292 LF, 50 LF, and 77
LF, but incorrectly totaled them as 374 LF. The correct total should be
419 LF of intermittent stream channel. We therefore request that a
revised 401 be issued that replaces the 374 LF on page 2 with 419 LF. I
am sending you a paper copy of this request for your files, but is there
any way that the correction could be made this week? Give me a call
when you get the chance (846-5900).
Thanks
Sean
l of 1 3/21/2006 10:40 AM
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
September 21, 2005
Mr. Pete Sullivan
KB Home Raleigh - Durham, LLC
1100 Navahoe Drive
Raleigh, NC, 27609
Re: Amberly PUD MF-2 & MF-2a in Wake County
DOA Action ID200520751, DWQ Project No.20050819
APPROVAL of 401 Water Quality Certification
Dear Mr. Sullivan:
Attached hereto is a copy of Certification No. 3353 issued to Mr. Pete Sullivan of KB Home Raleigh-
Durham, LLC, dated September 21, 2005. In addition, you should get any other federal, state or local
permits before you go ahead with your project including (but not limited to) Solid Waste, Sediment and
Erosion Control, Stormwater, Dam Safety, Non-discharge and Water Supply Watershed regulations.
Please note that since the U.S. Army Corps of Engineers intends to consider the two Amberly phases
Amberly PUD MF-2 & MF-2a and Sandler at Amberly together as a separate and complete project (note
that two different owners are involved), the Division will also consider these two phases as portions of a
larger single project.
If we can be of further assistance, do not hesitate to contact us.
Sincerely,
Al W. Klimek, P.E.
AWK/cbk
Attachments: Certificate of Completion
cc: Todd Tugwell, U.S. Army Corps of Engineers, Raleigh Regulatory Field Office
Wilmington District, USACOE
Eric Kulz, DWQ, Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Sean Clark, S&EC, 11010 Raven Ridge Road, Raleigh, NC, 27614
Don Sever/Debbi Fenn, Chas H. Sells, 15401 Weston Parkway, Suite 100, Cary, NC, 27513
Filename: 050819Amberly(Wake)401
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet htto://h2o.enr.state.nc.us/ncwetiands
Woe ofthCarolina
tma!!y
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC
Mr. Pete Sullivan
Page 2 of 4
September 21, 2005
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 211, Section.0500 to Mr. Pete Sullivan of KB Home Raleigh-Durham, LLC to fill
374 feet of intermittent stream channel and to convert a 1.717 acre farm pond into a non jurisdictional
stormwater retention pond in the Cape Fear River Basin, associated with the construction of the Amberly
PUD MF-2 & MF-2a subdivision in Wake County, North Carolina, pursuant to an application filed on the
6th day of May of 2005, and in additional correspondence received July 26, 2005.
The application and supporting documentation provides adequate assurance that the proposed work will
not result in a violation of applicable Water Quality Standards and discharge guidelines. Therefore, the
State of North Carolina certifies that this activity will not violate the applicable portions of Sections 301,
302, 303, 306, 307 of PL 92-500 and PL 95-217 if conducted in accordance with the application, the
supporting documentation, and conditions hereinafter set forth.
This approval is only valid for the purpose and design submitted in the application materials and as
described in the Public Notice. If the project is changed, prior to notification a new application for a new
Certification is required. If the property is sold, the new owner must be given a copy of the Certification
and approval letter and is thereby responsible for complying with all conditions of this Certification. Any
new owner must notify the Division and request the Certification be issued in their name. Should wetland
or stream fill be requested in the future, additional compensatory mitigation may be required as described
in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site plan result in a
change in stream or wetland impact or an increase in impervious surfaces, the DWQ shall be notified in
writing and a new application for 401 Certification may be required. For this approval to be valid,
compliance with the conditions listed below is required.
Conditions of Certification:
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 374 feet Public Notice, Areas A, B & C
Waters 1.717 (acres) Public Notice, Area D
Sediment and Erosion Control:
2. 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:
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
Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC
Mr. Pete Sullivan
Page 3 of 4
September 21, 2005
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.
c. For borrow pit sites, the erosion and sediment control measures must be designed, installed,
operated, and maintained in accordance with the most recent version of the North Carolina
Surface Mining Manual.
d. The reclamation measures and implementation must comply with the reclamation in
accordance with the requirements of the Sedimentation Pollution Control Act.
3. 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 404/4011'ermit Application. 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. 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;
Continuing Compliance:
5. Mr. Pete Sullivan and KB Home Raleigh-Durham, LLC, shall conduct construction activities in a
manner consistent with State water quality standards (including any requirements resulting from
compliance with section 303(d) of the Clean Water Act) and any other appropriate requirements
of State law and federal law. If the Division determines that such standards or laws are not being
met (including the failure to sustain a designated or achieved use) or that State or federal law is
being violated, or that further conditions are necessary to assure compliance, the Division may
reevaluate and modify this Certification to include conditions appropriate to assure compliance
with such standards and requirements in accordance with 15A NCAC 2H.0507(d). Before
modifying the Certification, the Division shall notify Mr. Pete Sullivan and/or KB Home Raleigh-
Durham, LLC and the US Army Corps of Engineers, provide public notice in accordance with
15A NCAC 2H.0503 and provide opportunity for public hearing in accordance with 15A NCAC
2H.0504. Any new or revised conditions shall be provided to Mr. Pete Sullivan of KB Home
Raleigh-Durham, LLC in writing, shall be provided to the United States Army Corps of
Engineers for reference in any Permit issued pursuant to Section 404 of the Clean Water Act, and
shall also become conditions of the 404 Permit for the project;
Road Crossings:
7. Culvert Installation
Culverts required for this project shall be installed in such a manner that the original stream profiles
are not altered. Existing stream dimensions (including the cross section dimensions, pattern, and
longitudinal profile) must be maintained above and below locations of each culvert. Culverts shall
be designed and installed to allow for aquatic life movement as well as to prevent head cutting of
the streams. If any of the existing pipes are or become perched, the appropriate stream grade shall
be re-established or, if the pipes installed in a perched manner, the pipes shall be removed and re-
installed correctly.
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Amberly PUD MF-2 & MF-2a, KB Home Raleigh-Durham, LLC
Mr. Pete Sullivan
Page 4 of 4
September 21, 2005
The establishment of native, woody vegetation and other soft stream bank stabilization techniques
must be used where practicable instead of rip rap or other bank hardening methods. If rip-rap is
necessary, it shall not be placed in the stream bed, unless specifically approved by the Division of
Water Quality.
Installation of culverts in wetlands must ensure continuity of water movement and be designed to
adequately accommodate high water or flood conditions.
Other conditions:
6. Certificate of Completion
Upon completion of the project, the Applicant shall complete and return the enclosed "Certificate of
Completion" form to notify NCDWQ when all work included in the §401 Certification has been
completed. The responsible party shall complete the attached form and return it to the
401/Wetlands Unit of the NC Division of Water Quality upon completion of the project. Please
send photographs upstream and downstream of each culvert site to document correct installation
along with the Certificate of Completion form.
7. 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.
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.
If this Certification is unacceptable to you, you have the right to an adjudicatory hearing upon written
request within sixty (60) days following receipt of this Certification. This request must be in the form of a
written petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the
Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. If
modifications are made to an original Certification, you have the right to an adjudicatory hearing on the
modifications upon written request within sixty (60) days following receipt of the Certification. Unless
such demands are made, this Certification shall be final and binding.
This the 21st day of September 2005
DIVISION OF WATER QUALITY
G?ti2?
Alan W. Klimek, P.E.
v
AWK/cbk

Staff Report
Project Num: 20050819 Version: 1
Name: Amberly Pud Mf-2 Mf-2a For Kb Home Raleigh -
Durham
County: Wake
Location: Ut Panther Creek Cary
Latitude: +35°49'23"
SW Plan Location:
Owner: Kb Home Of Raleigh-Durham LLC
Contact Person: Kb Home Of Raleigh-Durham LLC Title:
Inspection Date: 07/20/2005
Reason for Inspection: Routine
On-Site Representative(s):
Primary Inspector: Eric Kulz
Secondary Inspector(s):
Question Areas:
Site Visit
Inspection Summary:
Status: On Hold
Project Type: Residential Subdivision
Region: Raleigh
Longitude: -78°55'04"
Phone: [phone] Ext.
Entry Time: 07:00 AM Exit Time: 08:15 AM
Inspection Type: Staff Report
Phone:
,4 3s 33
Page: 1
w
Project Num: 20050819 Owner: Kb Home Of Raleigh-Durham LLC
Inspection Date: 07/20/2005 Inspection Type: Staff Report
Reason for Visit: Routine
Sim
Do impacts described in the application differ those seen in the field? Yes
0 No NA NE
? s o
If yes, please describe differences:
Are the Intermittent/Perennial calls different in the application? O E O O
If yes, please describe differences, and how mitigation ratios are affected:
Are there additional impacts not described in the application? ? E O O
If yes, please describe and quantify:
Were the impacts in place prior to the application for the 401 Certification? ? N 13 ?
Additional conditions recommended for the Certification:
Recommended project modifications:
Is this a modification request to an existing Certification? 13 E El ?
Are there additional stromwater conditions that should be required due to the following classifications: 0 E O O
303(d)list, Class WS, NSW, ORW, HQW
Describe:
Is this a subdivision or otherwise part of a larger project?
If yes, what phase is this? Unknown.....
Are there prior impacts from prior phases? N O O 0
If yes, what are the cumulative imacts for this project? Unclear...... concurrent applications in review now.
Possible secondary impacts noted:
Comment: 07/20/05 My only specific comment is that for the one crossing applied for in the application (Impact B;
greenway trail), no details are provided such as engineering drawings, profiles, assurances that aquatic life passage
provisions are met, etc.
In general, while the application does provide some information regarding avoidance and minimization of impacts
(Section2), Area A seems a bit excessing (292 LF of intermittent stream filled for lots). EWK
Page: 2
O?OF W AT ?RQG
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O 'C
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
July 29, 2005
DWQ Project # 20050393
Chatham County
Sandler at Amberly, LLC
Attn: Mr. Bob Jones
3412 %2 Hillsborough Street
Raleigh, NC 27607
Subject Property:
Dear Mr. Jones:
The Peninsula for Sandler at Amberly
UT to Panther Creek [03-06-05, 16-41-1-17-3, WS-IV, NSW (nutrient sensitive)]
Reference is made to the General 401 Water Quality Certification issued to you on May 20, 2005 for the
referenced project, and to our correspondence dated June 20, 2005, noting that the Certification was not
valid due to elevation of the 404 Permit to Individual Permit status. In our July 18,2005 meeting with
you, the U.S. Army Corps of Engineers and various parties involved in other phases of the Amberly
development, the Corps confirmed that The Peninsula for Sandler at Amberly (DWQ Project No.
20050393) is to be processed by the Corps as a separate and complete project on its own, and that this
project will qualify for Nationwide Permits 12 and 39. Therefore, the General Certification issued to you
on May 20, 2005 is valid and you may proceed with your project in accordance with the conditions of that
Certification.
For your information, please note that the other two active files currently in our records for the Amberly
development include 1) an Individual Permit application for Amberly PUD MF-2 & MF-2a in Wake
County by KB Home Raleigh-Durham, LLC, attn: Mr. Pete Sullivan (DOA Action ID200520751, DWQ
Project No.20050819), and 2) an Individual Permit application for Sandler at Amberly in Wake and
Chatham Counties by Sandler at Amberly, LLC/GS Carolina, attn: Mr. Bob Jones (DOA Action ID
200520319, DWQ Project No. 20051321). The Corps intends to process The Peninsula for Sandler at
Amberly as one separate and complete project, while the two active files for Amberly PUD MF-2 & MF-
2a and Sandler at Amberly will constitute a second separate and complete project (note that two different
owners are involved in this second complete project).
Thank you for your attention. If you have any questions, please contact meat 919-733-9721.
Sincerely,

Cyndi Karoly
401 Oversight and Express Permits Unit
401 OversightlExpress Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: htti)://h2o.enr.state.nc.us/ncwetlands
oe
N Carolina
Xafura!!y
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
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US Army Corps
Of Engineers
Wilmington District

PUBLIC NOTICE
Issue Date: May 6, 2005
Comment Deadline: June 6, 2005
Corps Action ID #: 200520751
All interested parties are herby advised that the Wilmington District, Corps of Engineers
(Corps) has received an application for work within jurisdictional waters of the United
States. Specific plans and location information are described below and shown on the
attached plans. This Public Notice and all attached plans are also available on the
Wilmington District Web Site at www.saw.usace.anny.mil/wetlands
Applicant:
Agent:
KB Home Raleigh - Durham, LLC ,? .
Attn: Mr. Pete Sullivan Ig @r'_ ;
1100 Navahoe Drive ;-
Raleigh, North Carolina 27609
JUN
Soil & Environmental Consultants, Inc: pR.W
Attn: Mr. Sean Clark ,? gAN $Ti)WA1ERBRA
11010 Raven Ridge Road
Raleigh, North Carolina 27614
Authority
The Corps will evaluate this application and a decide whether to issue, conditionally
issue, or deny the proposed work pursuant to the applicable procedures of Section 404 of
the Clean Water Act.
Location
The project is approximately 90 acres in size and is located to the north and west of the
intersection of Yates Store Road and north of Carpenter Fire Station Road, east of
Panther Creek, in Cary, Wake County, North Carolina. Coordinates (in decimal degrees)
for the site are 35.8240 ° North, 78.9145 ° West. The site contains tributaries of Panther
Creek and Morris Branch, and adjacent wetlands, in the Cape Fear River Basin. The
project, identified as parcels MF-2 and MF-2A, are located within the Amberly Planned
Unit Development (PUD).
MAY 0 9 2005
US ARMY CORPS OF ENGINEERS
North Carolina DENR - Division of Water Quality
INDIVIDUAL PERMIT APPLICATION
For
Amberly MF-2 & MF-2a
Cary, North Carolina
Soil & Environmental Consultants, PA
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT I OMB APPROVAL NO. 0710-003
(33 CFR 3251 Expires October 1996
Public reporting burden for this collection of information is estimated to average 5 hours per response, including the time for reviewing instructions,
searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send
comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to
Department of Defense, Washington Headquarters Service Directories of Information Operations and Reports, 1215 Jefferson Davis Highway, Suite
1204, Arlington, VA 22202-4302= and to the Office of Management and Budget, Paperwork Reduction Project (0710-0003), Washington, DC 20503.
Please DO NOT RETURN your form to either of those addresses. Completed applications must be submitted to the District Engineer having jurisdiction
over the location of the proposed activity.
PRIVACY ACT STATEMENT
Authority: 33 USC 401, Section 10; 1413, Section 404. Principal Purpose: These laws required permits authorizing activities in, or affecting, navigable
waters of the United States, the discharge of dredged or fill material into waters of the United States, and the transportation of dredged material for the
purpose of dumping it into ocean waters. Routine Uses: Information provided on this from will be used in evaluating the application for a permit.
Disclosure: Disclosure of requested information is voluntary. If information is not provided, however, the permit application cannot be processed nor
can a permit be issues.
One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
application (see sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed
activity. An application that is not completed in full will be returned.
(ITEMS 1 THRU 4 TO BE FILLED BY THE CORPSI
1. APPLICATION NO. 1 2. FIELD OFFICE CODE 1 3. DATE RECEIVED 1 4. DATE APPLICATION COMPLETED
(ITEMS BELOW TO BE FILLED BY APPLICANT)
5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE Ian agent is not required!
KB Home Raleigh-Durham, LLC Sean Clark, Soil & Environmental Consultants, P.A.
Attn: Pete Sullivan Project Manager / Environmental Scientist
6. APPLICANT'S ADDRESS 9. AGENT'S ADDRESS
1100 Navahoe Drive 11010 Raven Ridge Road
Raleigh, NC 27609
Raleigh N.C. 27614
7. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
a. Residence NA a. Residence 919-270-2738 (cell)
b. Business 919-871-0092 b. Business 919-846-5900
11
STATEMENT OF AUTHORIZATION
I hereby authorize, to act in my behalf as my agent in the processing of this application and to
furnish, upon request, supplemental information in support of this permit application.
//?APPLI ANT'S SIGNATURE
?f DATE tt?ps
NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY
12. PROJECT NAME OR TITLE (seeinstructions)
Amberly P.U.D. Parcels MF-2 and MF-2a
13, NAME OF WATERBODY, IF KNOWN (il app/icaarei UT to Panther Creek 114. PROJECT STREET ADDRESS titapplicable)
15. LOCATION OF THE PROJECT Not Applicable
COUNTY Wake STATE NC
16. OTHER LOCATION DESCRIPTIONS, IF KNOWN, /see instructions/
17. DIRECTIONS TO THE SITE
The project site is located immediately north of Yates Store Road (SR 1734) and immediately east of Panther Creek in what is now the Town of Cary.
ENG. FORM 4345, Feb 94 EDITION OF SEPT 91 IS OBSOLETE (Proponent: C
18. . Nature of Activity (Description of project, include all fearuresl
The proposed project is a residential subdivision with single and multi family portions. Typical utilities (i.e. roads, sewer, electric, etc.) will be installed to
the subject property. As stated above the area pertaining to this application is a smaller portion of the Amberly Subdivision, which the USACE has
considered to be one project. Proposed impacts are as follows: a) 292 linear feet of intermittent/unimportant stream channel resulting from the construction
of a road and lot fill, b) 50 linear feet of intermittent/unimportant stream impact resulting from the installation of a Town of Cary greenway trail, c) 77
linear feet of intermittent/ unimportant stream channel resulting from lot fill, and d) 1.717 acres of open water impact resulting from the conversion of an
irrigation pond to a stormwater pond.
19. Project Purpose (Describe the reason or purpose of the project, see instructions)
The purpose of the project is to provide additional housing for the area.
USE BLOCKS 20-22 IF DREDGED AND/OR FILL MATERIAL IS TO BE DISCHARGED
20. Reason(s) for Discharge
The proposed impacts are required to construct roads, greenways, lots and stormwater as shown on the attached impact maps.
21. Type(s) of material Being Discharged and the Amount of Each Type in Cubic Yards
Construction grade fill will be used on the site. Fill available from onsite grading will be utilized as much as possible. Cubic yardage of fill required for
the proposed impacts are as follows: Impact Area A = 530 yd3, Impact Area B = 15 yd3, and Impact Area C = 114 yd3. The conversion of the existing
1.717-acre irrigation pond to the stormwater pond will not require fill within the currently jurisdictional area.
22. Surface Area in Acres of Wetlands or Other Waters Filled (see instructions)
Impacts resulting from fill within MF-2 and MF-2A total 0.0432 acre. This total includes stream areas as well as wetland areas. Although the pond is not
being filled, by the USACE and US EPA's current definitions, the pond's surface area of 1.717 acres will be impacted.
23. Is Any Portion of the Work Already Complete? Yes No X IF YES, DESCRIBE THE COMPLETED WORK
The site has been partially graded primarily due to adjacent road construction of the Yates Store Road Extention. No impacts to wetlands within MF-2 or
MF2A have occurred. The areas that have been partially graded are within what was a pasture (i.e. not forested).
24. Addresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (If more than can be entered here,
please attach a supplemental list).
Please see attachement.
25. List of Other Certifications or Approvals/Denials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL* IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATE DENIED
* Would include but is not restricted to zoning, building and flood plain permits.
26. Application is hereby made for a permit or permits to authorize the work described in this application. I certify that the information in this
application is complete and accurate. I further certify that I possess the authority to undertake the work described herein or am acting as the duly
authorized agen of a applicant.
? - r ?, s?tl1. UCtw (1?1os ? '///off
GNATU E OF APPLICANT DAT SIGNATURE OF AGENT DA E
? rcc&r 4 ci?t?d ai;e k t3 do io,, RcJt?i }?µrhAkk
The application must be si ned by the person who desires to undertake the proposed activity (applicant) or it may be signed by a duly authorized
agent if the statement in block 11 has been filled out and signed.
18 U.S'.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States knowingly
and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or fraudulent statements or
representations or makes or uses any false writing or document knowing same to contain any false, fictitious or fraudulent statements or entry,
shall be fined not more than $10,000 or imprisoned not more than five years or both.
TABLE OF CONTENTS
1. PURPOSE AND NEED STATEMENT ............................................................................................ 2
2. WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS ............................................... 2
3. PUBLIC INTEREST ISSUES ............................................................................................................ 2
3.1 CONSERVATION: ........................................................................................................................... 3
3.2 WATER QUALITY: ........................................................................................................................ 3
3.3 WETLANDS: .................................................................................................................................. 3
3.4 FLOOD HAZARD: .......................................................................................................................... 4
3.5 FLOODPLAIN VALUE: ................................................................................................................... 4
3.6 LAND USE: ................................................................................................................................... 4
3.7 RECREATION: ............................................................................................................................... 4
3.8 SAFETY: ....................................................................................................................................... 4
3.9 AESTHETICS: ................................................................................................................................ 5
3.10 HISTORIC PROPERTIES: ................................................................................................................. 5
3.11 WATER SUPPLY: ........................................................................................................................... 5
3.12 NAVIGATION: ............................................................................................................................... 6
3.13 ENERGY NEEDS: ........................................................................................................................... 6
3.14 MINERALNEEDS :......................................................................................................................... 6
3.15 ECONOMICS: ................................................................................................................................. 6
3.16 FISH & WILDLIFE VALUES: .......................................................................................................... 6
3.17 SHORE EROSION & ACCRETION: .................................................................................................. 7
3.18 FOOD & FIBER PRODUCTION: ....................................................................................................... 7
3.19 ENVIRONMENTAL CONCERNS: ...................................................................................................... 7
3.20 PROPERTY OWNERSHIP: ............................................................................................................... 8
3.21 NEEDS AND WELFARE OF THE PEOPLE: ........................................................................................ 8
4. MITIGATION .....................................................................................................................................8
Attachment 1 USGS Quad Site Vicinity Map
Attachment 2 Wake County Soil Survey Site Vicinity Map
Attachment 3 Proposed Site Plan / Impact Maps (4 sheets)
Attachment 4 Parcel Map Depicting Current Landowners and Adjacent Land Owners
Attachment 5 Stormwater Management Plan
1. PURPOSE AND NEED STATEMENT
The purpose of the proposed project is to construct a residential subdivision that includes
both single-family and multi-family components to meet the demand for housing in the
area. The property is included in the Town of Cary and is within an area that is situated
close to Raleigh and the Research Triangle Park. This area has experienced a great deal
of growth in the past 5 to 8 years and the demand for adequate housing has increased.
The subject property (the Project) is considered a portion of the Amberly project and is
designated as MF-2 and MF-2a. The remaining portion of the Amberly Project will be
permitted by others and will be developed by others as well so their final impact totals are
not currently known.
2. WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS
The project site contains approximately 0.4233 acre of wetlands, a 1.717- acre pond, and
four intermittent/unimportant stream channels. The Project will not impact any wetland
areas but does propose fill in 419 linear feet of intermittent/unimportant stream and
converts the existing irrigation pond to a stormwater pond.
Wetland areas were avoided completely. A potential road crossing downstream of
Impact Area D (the pond) would have further connected the northern portion of the
property to the southern portion, however this was abandoned and the potential wetland
and stream impacts avoided. In a similar effort to avoid and minimize wetland impacts,
the greenway trail that is required by the Town of Cary along the western property line
was routed in such a way so as to avoid two large wetland areas adjacent to the stream
channel (see Sheet 2 of Impact Maps). The eastern portion of the project that is east of
the rerouted Yates Store Road avoids stream and wetland impacts completely.
3. PUBLIC INTEREST ISSUES
In a document provided by the U.S. Corps of Engineers titled "Wetlands & Corps
Wetland Regulations" and dated August 13, 2001, the Corps of Engineers lists 21
specific factors that will be reviewed related to Public Interest. These items are as
follows:
Conservation
Water Quality
Wetlands
Flood Hazard
Floodplain Value
Land Use
Recreation
Safety
Aesthetics
Historic Properties
Water Supply
Navigation
Energy Needs
Mineral Needs
Economics
Fish & Wildlife Values
Shore Erosion and Accretion
Food & Fiber Production
Environmental Concerns
Property Ownership
Needs and Welfare of the People
Responses to each of the 21 Public Interest Issues are presented below.
2
3.1 Conservation:
The client requested a detailed wetland delineation prior to site plan development in order
to avoid and minimize impacts to jurisdictional areas as much as possible. The site plan
has avoided all wetland areas as well as the majority of the streams on site. Riparian
buffers have been placed along streams below the two ponds that occur on the project's
property which will provide some wildlife cover and act as small-scale wildlife corridors.
3.2 Water Quality:
The Site is located in the Cape Fear River Basin in DWQ subbasin 03-06-05 and in
USGS Hydrologic Unit Code 03030002. Stormwater devices have been placed
throughout the property to comply with the Town of Cary's nitrogen reduction
requirements as well as DWQ's 85% TSS requirements. Please see Attachment 5 for
more information pertaining to the stonnwater devices. Impact Area D will convert an
existing irrigation pond to a stormwater pond in an effort to protect downstream water
quality.
The western portion of the property drains directly to Panther Creek. The eastern portion
of the property drains to Morris Branch and the large lake that dams up Morris Branch.
Morris Branch then drains into Panther Creek. Panther Creek and Morris Branch are
classified as WS-IV, NSW waters by NCDENR.
3.3 Wetlands:
S&EC personnel conducted a detailed wetland delineation of the Site. Ms. Amanda
Jones of the US Army Corps of Engineers reviewed the site and approved the delineation
in 2002 (Action ID #200220442). As mentioned above a total of 0.4233 acre of wetlands
are located within the Project's boundaries and are being completely avoided. Based on
the proposed site plan, only streams and a surface water (Impact Area D) of 1.717 acres
in size will be permanently impacted by the development. The proposed impacts will
result from the installation of roads and lot fill (Impact Areas A and C), the installation of
a Town of Cary greenway trail (Impact Area B), and the conversion of an existing
irrigation pond to a stormwater pond (Impact Area D). The remaining streams and
wetlands as well as an isolated (i.e. Nonjurisdictional) pond will be avoided.
3
3.4 Flood Hazard:
The Project is located completely outside of any 100-year Floodplain.
3.5 Floodplain Value:
The streams within the project area that contain floodplains are buffered. The small
intermittent streams with impacts depicted on sheets 1 and 3 on the attached impact maps
are at the extreme top of the drainage basins and do not have floodplains associated with
them. The impact depicted on sheet 2 of the impact maps does occur within that stream
feature's floodplain (not a LAMA mapped floodplain) and the pipes have been sized
accordingly.
3.6 Land Use:
Land use in the surrounding area consists of primarily single-family residential
subdivisions. A partially forested tract exists immediately north of the subject area of the
property and was determined to be part of the same project with regards to 401/404
permitting. This additional portion of Amberly is being developed by Sandler at
Amberly, LLC (GS Carolina), a separate entity from the applicant of this project. The
northern portion of Amberly will be a combination of single-family residential
subdivisions and a retirement community.
The project area has in the past been used primarily as pasture land and has therefore
been primarily in herbaceous cover. Only the drainages below the ponds have been
forested and they will remain so.
3.7 Recreation:
There are no designated scenic or recreational areas currently within the Project's area.
As mentioned above, the proposed Impact Area B will result from the installation of a
greenway trail that will run along the western property line. This greenway trail will tie
into other Town of Cary greenway trails and can be utilized by the Project's residents as
well as the general public.
3.8 Safety:
Entrances to the community will meet the standards of the North Carolina Department of
Transportation. For example all intersections onto Yates store Road will occur at 90°
angles. Construction practices will follow industry and OSHA standards for safety. The
site is within the Town of Cary's jurisdiction and will therefore be inspected regularly to
certify that construction practices etc. meet specified standards.
4
3.9 Aesthetics:
The Project has been designed to be as aesthetically pleasing as possible with regards to
landscaping, architecture, etc. Although the pond depicted as Impact Area D will be
utilized as a stormwater device it will also have a great deal of aesthetic value for the
property. Likewise a nonjurisdictional pond on the eastern portion of the property will
also remain in place as an aesthetic feature. The required riparian buffers that exist along
three of the stream features on the property will further enhance the development.
3.10 Historic Properties:
NC SHPO maintains records of locations of buildings, structures, and objects that are
listed by local governments as historic landmarks or that are listed or eligible for listing
on the National Register of Historic Places. On January 15, 2004, S&EC, PA conducted
a review of records at the NC State Historic Preservation Office (SHPO) and the North
Carolina Office of State Archaeology (OSA) for sites and structures of archaeological
and historical significance on the project site. Two sites were found that were classified
as eligible for listing in the National Register of Historic Preservation by the NC SHPO
are located in the vicinity of Amberly: the William Marcom Farm and the John D.
Horton Farm.
According to NC SHPO records, the William Marcom Farm "is eligible for listing in the
National Register under Criterion A as an intact example of the development of a
Chatham County farm complex, and under Criterion C for architecture". NC SHPO
records state that the John Horton Farm contained "numerous outbuildings which
retained their architectural integrity" when it was surveyed and that the property is
believed to be eligible "under Criterion A for social history and Criterion C for
architecture."
The Office of State Archaeology maintains information of sites of archaeological
importance in North Carolina. The Office of State Archeology has no record of sites of
archaeological importance on or adjacent to the project site. According to Office of
State Archaeology records, an archaeological survey has never been performed on the
Amberly project site.
3.11 Water Supply:
Water will be provided by the Town of Cary as will sewer service. Older homes in the
area primarily are served by individual wells. The newer residential developments in the
area, such as Cary Park to the south, are provided water by the Town of Cary also. The
Town of Cary's main source of drinking water is Jordan Lake, which this site drains to.
As stated above, Panther Creek and Morris Branch are classified as WS-IV, NSW waters
by NCDENR.
3.12 Navigation:
No navigable waters are found on this site.
3.13 Energy Needs:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect the energy status of the County.
3.14 Mineral Needs:
This public interest issue is not applicable to this application, as the Briar Chapel Project
will not affect the need for minerals in the area.
3.15 Economics:
The Fiscal Impact Analysis has been completed for this project. The project is expected
to generate significant tax revenue. More immediately the project will provide jobs for
the area such as construction and landscaping work.
3.16 Fish & Wildlife Values:
The site has historically been used as pastureland and with the exception of the drainages
on property has been primarily in herbaceous cover. Species that require large forested
tracts will not be impacted because the Project's area is not being converted from a large
forested tract. Wildlife that utilize disturbed areas will be impacted the most by this
project. Species such as Robins, Mockingbird, Black snake, Field mouse, etc. that
require small areas of habitat or that are common to both disturbed areas and areas
occupied by humans will likely be only temporarily displaced.
At the time of delineation the streams with direct impacts did not contain fish. Although
the two ponds onsite were not evaluated for the presence of fish, if any exist they were
most likely placed there by previous landowners and did not occur there naturally. The
pond identified in As Impact Area D will be drained so that the dam can be reconstructed.
At this point any fish within the pond will be killed. The other isolated pond on the
property will not be altered so any fish that may occur within the pond will not be
harmed. Amphibians will still be able to utilize both ponds and the wetland and stream
areas that remain on the property after construction. The stream and wetland areas o the
property without proposed impacts will be buffered and therefore will enjoy the same
level of habitat protection that currently exists.
6
On January 15, 2004, S&EC, PA reviewed current NC Natural Heritage Program (NHP)
database files for known populations or records of Federally-listed Threatened or
Endangered species in the vicinity of the Amberly project. The NHP has no record of
occurrence of any Federally-listed Threatened or Endangered species within the
boundaries of Amberly. The nearest known occurrence of any Federally-listed
Threatened or Endangered species is for the Bald Eagle (Haliaeetus leucocephalus). The
NHP has records of the occurrence of the Bald Eagle in four locations in the vicinity of
Everett B. Jordan Lake, greater than 2 miles west of the project. The Bald Eagle
typically requires large areas of open water such as Lake Jordan. Although the Pond on
Morris Branch is rather large, habitat is not likely to be sufficient to support the Bald
Eagle. The Project is not expected to have any direct adverse effect on federally listed
species. No other occurrences of Endangered animal species are located within 5 miles
of the project and no occurrences of Endangered plant species are located within 2 miles
of the project.
3.17 Shore Erosion & Accretion:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect shore erosion or accretion.
3.18 Food & Fiber Production:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not be producing any food or fiber and has not been in agriculture in recent history.
3.19 Environmental Concerns:
Noise
This region of the county is currently being developed but has in the past been primarily
used for agriculture or timber production. In the past, the majority of the noise producing
activities in the area are directly related to localized farming and logging operations;
therefore the noise generated on site is primarily the result of the operation of heavy
tillage equipment and motor vehicles. Recently due to the development of residential
neighborhoods, noise-generating activities have been due to grading and construction of
roads and housing.
Noise levels on the Project are expected to increase during the construction phase of the
project. Increased noise levels will be as a result of commonly used mechanical
equipment that will be utilized to grade the Site, road construction and building
construction. Construction is normally limited to daylight hours when loud noises are
more tolerable. Every reasonable effort will be made to minimize construction noise.
7
Immediately following completion of the project, noise levels will be similar to other
residential areas and will result primarily from cars etc. The preserved riparian buffers on
the property will help reduce this noise to surrounding areas.
Erosion and Sedimentation
The attached Water Quality Report prepared by Withers & Ravenel provides the
locations, calculations and surface areas for the proposed stormwater BMP devices. All
stormwater runoff on the Project will be directed to one of these devices, which will
greatly reduce if not eliminate erosion and sedimentation issues resulting from the
Project. During construction of the Project, temporary basins will also be used to further
isolate any potential problems. As previously mentioned, the eastern portion of the
property ultimately drains to the large pond that is on Morris Branch. Although the
stormwater will be retained prior to reaching Morris Branch, the large pond that was
constructed on Morris Branch will further reduce the likelihood of sediment entering the
stream system off property. The stormwater BMPs will be required to meet the DWQ's
requirements of removal of 85 percent of the total suspended solids (TSS). During
construction, erosion and sedimentation may occur during rain events.
3.20 Property Ownership:
Please see attached parcel data on Attachment 4.
3.21 Needs and Welfare of the People:
The proposed project includes designated sites for community infrastructure such as
public roads and a section of the Town's greemvay system. The Project will be within
the Town of Cary's jurisdiction and therefore will be provided services by the Town's
Fire Department, Police Department, etc. Children living within this proposed
development will attend Wake County Schools.
The proposed Stormwater management plan for the Project will ensure that runoff from
the site does not negatively affect the surrounding communities or the drinking water that
is taken from the Lake downstream of the Project.
6. MITIGATION
No wetland impacts are proposed therefore no wetland mitigation is proposed. Although
the jurisdictional irrigation pond will be converted to a stormwater pond and thus be
removed from jurisdiction, the pond itself will remain in place and therefore no
mitigation is proposed for this impact. No impacts are proposed to stream channels that
are considered perennial or that demonstrate important aquatic function, therefore no
stream mitigation is proposed. If stream mitigation is required, a payment to the NCEEP
is proposed.
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Project Mgr.:
SC (Parcels MF-2 & MF-2A)
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11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] • [phone]
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Project Mgr.: (Parcels MF-2 & MF-2A) 11010 Raven Ridge Rd.- Raleigh, NC 27614
SC [phone] - [phone]
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OWNERI: SANDLER AT AMBERLY
LLC
ADDR1: 448 VIKING DR STE 220
ADDR2: VIRGINIA BEACH VA
23452-7331
OWNERI: SANDLER AT AMBERLY
LLC
ADDR1: 448 VIKING DR STE 220
ADDR2: VIRGINIA BEACH VA
23452-7331
OWNER1: FOWLER, LILLIE H
ADDRL: 2109 YATES STORE RD
ADDR2: CARY NC 27519-9568
OWNERI: MILLS, WILLIAM ELTON &
BILLIE PERRY
ADDRL• 7711 CARPENTER FIRE `
STATION RD
ADDR2: CARY NC 27519-8626
OWNERI: PULTE HOME
CORPORATION
ADDRL: 801 CORPORATE
CENTER DR STE 118
ADDR2: RALEIGH NC 27607-5073
OWNERI: PULTE HOME
CORPORATION
ADDR1: 801 CORPORATE
CENTER DR STE 118,
ADDR2: RALEIGH NC 27607-5073
OWNER1: KELLY, DOUGLAS OLIVE
& RAMONA
ADDR1: 1800 YATES STORE RD
ADDR2: CARY NC 27519-9561
OWNERI: HOLT, CAREY D &
SANDRA H
ADDRL• 1732 YATES STORE RD
ADDR2: CARY NC 27519-9559
OWNERI: HARVEY, THOMAS J &
NANCY O
ADDRi: 1720 YATES STORE RD
ADDR2: CARY NC 27519-9559

WITHERS 6?, RAVEN EL
WATER QUALITY REPORT
SUPPORTING DESIGN CALCULATIONS
AMBERLY P.U.D.
PORTIONS OF PARCELS MF-2 AND MF-2a
Cary, North Carolina
Prepared For:
KB-Home Raleigh-Durham, LLC
11oo Navahoe Drive
Raleigh, NC
Attn: Pete Sullivan
Prepared By:
WITHERS & RAVENEL, INC
111 MacKenan Drive
Cary, North Carolina 27511
February 2005
W&R Project No. 204020
INTRODUCTION
The purpose of this study is to document required water quality stormwater calculations for portions
. of parcels MF 2 and MF-2a of the proposed Amberly subdivision in Cary, NC. The goal is to provide
• detention structures which are designed in accordance with requirements set forth by the Division of
Water Quality.
METHODOLOGY
The stormwater study was conducted using proposed contours as shown on the construction
. drawings and do not reflect as-built contours. There are four (4) stormwater BMP's proposed at this
time forthese portions ofAmberly. Three wet ponds will be constructed and one existing pond will
be retrofitted with a proposed riser structure. Additional BMP's may be added to the site during
future phases, and design documentation will be provided at that time. The BMP's included in this
i report cover Phases I, Il and III.
A portion of Phase III will be piped into a stormwater wetland to be constructed by others. The area
. is included within this report for documentation only. West BMP 3 will be constructed offsite and
Withers and Ravenel will provide necessary watershed data as requested by the designing engineer.
. The scope of work included the following analyses:
HYdrolo.?y
• ? Simulation of the 1' i-inch of runoff for each drainage arga.
Hydraulic
? Determination of the drainage area characteristics for each basin
• ? Sizing a drawdown orifice for the is` i-inch of post development runoff in each proposed
stormwater BMP
. The results of the hydrology calculations are included in the attached spreadsheets. The hydraulic
design requires the development of stage-storage functions for each pond. The stage storage
functions for each pond were determined using Haestead Methods PondPack modeling software.
• CONCLUSIONS
Each proposed pond and associated outlet structure is sized in accordance with DWQ regulations
for stormwater Best Management Practices.
r
• Amberly W&R Project 204020
DWQ Report February 2005
i
Amberly East 1
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiency in the Piedmont
% Impervious
Cover Permanent Pool Dept
3.0 . 4.0 5.0 6.0 h (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 EAST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 5.45 40 2.2
0 0.0
Totals 5.45 2.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 285 286 287 288 289 290 291
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 4107.0546 3394.8486 2967.525 2492.721 2136.618 1946.696 1827.9954
SA Provided 5501 6418 7392 8421 9509 10653 11853
Normal pool depth - 3.00 ft
Surface are req'd - 0.094 acres
Normal pool elevation - 285.0 feet
Surface area provided m 0.126 acres
5501 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, Win.
I = Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S m (Design rainfall) (Rv) (Drainage Area)
S = 0.186 acre-ft
8111 cu. ft.
Water quality pool elevation m 287.50 feet
Storage volume provided - 0.386 acre-ft
16814 cu. ft.
Amberly - Phase 1 (EAST)
Stormwater Management
WR Project #204020
July 2004

Amberly East 2
Project Name: Amberly Project #: 204020
it /State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Rmmnval Fffirinnrv in the Pirr/mnnt
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
• Source: NCDENR/DWQ Stormwater Best Management Practices, pg. S, April i yyy
STORMWATER BMP 2 EAST - WET POND (25% TN Removal)

i

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 15.53 40 6.2
0 0.0
Totals 15.53 6.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 266 267 268 269 270 271 272
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 11703.222 9673.761 8456.085 7103.111 6088.381 5547.192 5208.948
SA Provided 6337.110 7613.852 9784.012 11406.186 13084.117 14819.112 16611.170
Normal Pool 267.5 267.6 267.7 267.8 267.9 268
SA/DA 1.34 1.32 1.30 1.29 1.27 1.25
SA Required 9064.923 8943.155 8821.388 8699.620 8577.853 8456.085
SA Provided 8698.932 8915.948 9132.964 9349.980 9566.996 9784.012
40 Normal pool depth - 4.70 ft
• Surface are req'd - 0.203 acres
Normal pool elevation - 267.7 feet
Surface area provided - 0.210 acres
9133 sq. ft.
•
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schue/er (1987)
• Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.

Total runoff volume from 1-inch precipitation:
• Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.531 acre-ft
23113 cu. ft.
•
Water quality pool elevation- 270.15 feet
Storage volume provided - 0.632 acre-ft
• 27530 cu. ft.
Amberly - Phase I (EAST) WR Project #204020
• Stormwater Management July 2004
0
AML
•
Amberly West 1
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENWDWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 WEST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 19.77 40 7.9
0 0.0
Totals 19.77 7.9
Total % Impervious Surface Area = 40.0 %
Normal Pool 249 250 251 252 253 254 255
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 14898.435 12314.891 10764.765 9042.403 7750.631 7061.686 6631.095
SA Provided 20527.000 22401.000 24331.000 26318.000 26382.000 30462.000 32619.000
Normal pool depth - 3.0 feet
Surface area required - 0.342 acres
Normal pool elevation - 249.0 feet
Surface area provided - 0.471 acres
20527 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv = Runoff coefficient, inJin.
1 - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S e (Design rainfall) (Rv) (Drainage Area)
S = 0.675 acre-ft
29424 cu.ft.
Water quality pool elevation - 251.20 feet
Storage volume provided - 1.150 acre-ft
50094 cu. ft.
Amberly- Phase 2 (WES1)
Stormwater Management
WR Project #204020
July 2004

Amberly West 2
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Effiriencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 2 WEST - WET POND (25% TN Removal) - Existing Pond

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.68 40 5.5
0 0.0
Totals 13.68 5.5
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.237 acres ** 3' Depth Assumed
Normal pool elevation @ 291.0 feet
Surface area provided m 1.400 acres
60984 sq. ft.
i 1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Itv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, in./in.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.467 acre-ft
20360 cu. ft.
Water quality pool elevation= 291.50 feet
Storage volume provided - 0.719 acre-ft
31320 cu. ft.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004

Amberly West 3
Project Name_ Amberly Proie #: 204020
QW/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
RPmnval Effiriencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ 5tormwater tsest management rractices, pg..5, Apni 1 VVV
STORMWATER BMP 3 WEST -WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.04 40 5.2
0 0.0
Totals 13.04 5.2
Total % Impervious Surface Area = 40.0 %
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
1 - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.446 acre-ft
19407 cu. ft.
Area is piped to offsite BMP constructed by others.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
W
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
•
0
0
0
0
0
0
0
0
0
0
0
Ak
Amberly West 4 - North
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
RPmnval Fffiriencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 4 WEST - DRY POND - NORTH OUTFALL(10% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 4.25 40 1.7
0 0.0
Totals 4.25 1.7
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.074 acres
Normal pool elevation - 280.0 feet
Surface area provided - 0.102 acres
4443 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.145 acre-ft
6325 cu. ft.
Water quality pool elevation - 281.30 feet
Storage volume provided - 0.149 acre-ft
6490 cu. ft.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004

• Project Name: Amberly
City/State: Cary, NC
. STORMWATER BMP EAST #1 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume: 0.386 Acre-ft 16814.16 cf
• Head: 2.5 ft 1.25 It
• Draw down time: 48 hrs 172800s
Orifice Area= 0.018075 sq. It 2.602824 sq. in
Orifice Diameter = 1.820445 in
USE 2" DIAMETER ORIFICE
Project #: 204020
Date: 3-Feb-05
Constants
g = 32.2 ft/s2
Cd= 0.6
S
Project Name: Amberly
Ci tat : Cary, NC
STORMWATER BMP EAST #2 - WET POND (25% TN Removal)
Project #: 204020
Date: 3-Feb-05
Orifice Calculator
Q =Cd*A*(2gh)^(112)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
0.632 Acre-ft
2.45 ft
48 hrs
0.029895 sq. ft
2.341186 in
27529.92 cf
1.225 ft
172800s
4.304884 sq. in
USE 2" DIAMETER ORIFICE
Constants
9 = 32.2 ft/s2
Cd= 0.6
•
•
•
•
•
•
•
i
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
i
•
•
•
Project Name: Amberly
City/State: Cary, NC
STORMWATER BMP WEST #1 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(112)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
USE 2" DIAMETER O
1.15 Acre-ft 50094 cf
2.2 ft 1.1 ft
96 hrs 345600 s
0.028703 sq. ft 4.133176 sq. in
2.29402 in
RIFICE

Project #: 204020
Date: 3-Feb-05
Constants
9 = 32.2 ft/s2
Cd= 0.6
i
i
i
i
•
i
Project Name: Amberly
Ci /Stat • Cary, NC
STORMWATER BMP WEST #2 - WET POND (25% TN Removal)
Retrofit Existing Pond
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume: 0.719 Acre-ft 31319.64 cf
Head: 0.5 ft 0.25 ft
Draw down time: 72 hrs 259200s
Orifice Area = 0.05019 sq. ft
Orifice Diameter = 3.033509 in
USE 3" DIAMETER ORIFICE
7.227366 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
g = 32.2 ft/s2
Cd= 0.6

Project Name: Amberly
Ci State: Cary, NC
STORMWATER BMP WEST #4 - WET POND (25% TN Removal)
Project #: 204020
Date: 3-Feb-05
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
0.149 Acre-ft
1.3 ft
72 hrs
0.00645 sq. ft
1.087503 in
6490.44 cf
0.65 ft
259200s
0.928861 sq. in
USE 1" DIAMETER ORIFICE
Constants
9 = 32.2 ft/s2
Cd= 0.6
O?O? WA
T ?9QG
>

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 20, 2005
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Amberly PUD MF-2 and MF-2a/KB Home Raleigh-Durham, LLC
Attn: Pete Sullivan . ,
-- -1140 Navah6e-Drive
Raleigh, NC 27609
Soil and Environmental Consultants, PA
Attn: Sean Clark
11010 Raven Ridge Road
Raleigh, NC 27614
The Peninsula for Sandler at AmberlyjSandler at Amberly, LLC
Attn: Bob Jones
3412 '/z Hillsborough Street `
Raleigh, NC, 27607
Chas H. Sells
Attn: Don Sever
15300 Weston Parkway, Suite 106
Cary, NC, 27513
DWQ Project # 05-0393 and 05-0819
Chatham and Wake Counties
Subject Properties: Amberly PUD M02 MF2-a; DOA Action ID No. 200520751;
DWQ #05-0819, Wake County
The Peninsula for Sandler at Amberly; DOA Action ID No. 200520319;
DWQ# 05-0393, Chatham County
REQUEST FOR MORE INFORMATION
Dear Sirs:
On May 20, 2005, the Division of Water Quality (DWQ) issued a General 401 Water Quality
Certification for The Peninsula for Sandler at Amberly. We have since been informed that this General .. .
Certification is not valid for this project, since an Individual 404 Permit will be required. The Public
Notice was issued May 24, 2005 (received by DWQ June 20, 2005), with the comment period open until
June 23, 2005. This project has been assigned DWQ Project No. 05-0393. Please refer to this project
number in all future correspondence.
On May 11, 2005, DWQ received a Public Notice for Amberly PUD M172 M172-a. The Division will
begin to review the project for eventual decision. However, please be aware that beginning January 1,
1999 that the N.C. General Assembly passed legislation requiring payment of a fee of $475.00 for this
project. The 401 Water Quality Certification cannot be issued until this fee is paid and all technical
review issues associated with the overall Amberly project are resolved. Until that time, your application
401 OversightlExpress Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetiands
One
N Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled110% Post Consumer Paper
Amoeny
Page 2 of 2
June 20, 2005
will remain on hold as incomplete. This project has been assigned DWQ Project No. 05-0819. Please
refer to this project number in all future correspondence.
We have been informed by the U.S. Army Corps of Engineers that the overall "Amberly" development
will be considered as a single project for regulatory review purposes, although it will be permitted in
phases. Furthermore, it appears that impacts which have occurred on earlier phases of the Amberly
project (Amberly Development - SIMANCO, DWQ Project #95-0410, 401 Certification issued May 18,
1995 and subsequently modified August 20, 1996 and January 7, 1998) do not fully match the permitted
impacts. Also, maps associated with previous and currently proposed phases are inconsistent, possibly
reflecting re-design and long-term planning for the Amberly Development. In order to resolve the various
issues associated with this project, a meeting has been scheduled for Monday, July 18, 2005 at the
Archdale Building (14th floor conference room #3) at 1:00 p.m. Those invited to attend this meeting
include staff from the Corps, DWQ, Wildlife Resources Commission, Town of Cary, the applicant(s) and
consultants involved. Please note that the purpose of this meeting is to begin resolving confusion (and
potential compliance problems) associated with this project. It is possible that further additional
information requests may be forwarded about any phase of Amberly following this meeting.
This letter only addresses the application review and does not authorize any impacts to wetlands or
waters. Please be aware that any impacts requested within your application are not authorized (at this
time) by the DWQ. Please call Ms. Cyndi Karoly 919-733-17.86 or Danny Smith at [phone](ext
353) if you have any questions regarding this matter.
Sincerely,
1 J??
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permits Unit
CBK/cbk
cc: Eric Kulz, DWQ Raleigh Regional Office
Todd Tugwell, USACE, Raleigh Regulatory Field Office
Jean Manuele, USACE, Raleigh Regulatory Field Office File Copy
Shari Bryant, Wildlife Resources Commission
Danny Smith, Compliance Oversight
Central Files
File copies
Filename: 050393-050819Amberly(Chatham Wake)hold
p?pF W ATF?QG Michael F. Easley, Governor
William G. Ross Jr., Secretary
ice-- North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
June 20, 2005
DWQ Project # 05-0393 and 05-0819
Chatham and Wake Counties
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Amberly PUD MF-2 and MF-2wTB Home Raleigh-Durham, LLC
Attn: Pete Sullivan
1100 Navahoe Drive
Raleigh, NC 27609
Soil and Environmental Consultants, PA
Attn: Sean Clark
11010 Raven Ridge Road
Raleigh, NC 27614
The Peninsula for Sandler at Amberlyj§andler at Amberly, LLC
Attn: Bob Jones
3412 '/2 Hillsborough Street
Raleigh, NC, 27607
Chas H. Sells
Attn: Don Sever
15300 Weston Parkway, Suite 106
Cary, NC, 27513
Subject Properties: Amberly PUD MF2 MF2-a; DOA Action ID No. 200520751;
DWQ #05-0819, Wake County
The Peninsula for Sandler at Amberly; DOA Action ID No. 200520319;
DWQ# 05-0393, Chatham County
REQUEST FOR MORE INFORMATION
Dear Sirs:
On May 20, 2005, the Division of Water Quality (DWQ) issued a General 401 Water Quality
Certification for The Peninsula for Sandler at Amberly. We have since been informed that this General
Certification is not valid for this project, since an Individual 404 Permit will be required. The Public
Notice was issued May 24, 2005 (received by DWQ June 20, 2005), with the comment period open until
June 23, 2005. This project has been assigned DWQ Project No. 05-0393. Please refer to this project
number in all future correspondence.
On May 11, 2005, DWQ received a Public Notice for Amberly PUD MF2 MF2-a. The Division will
begin to review the project for eventual decision. However, please be aware that beginning January 1,
1999 that the N.C. General Assembly passed legislation requiring payment of a fee of $475.00 for this
project. The 401 Water Quality Certification cannot be issued until this fee is paid and all technical
review issues associated with the overall Amberly project are resolved. Until that time, your application
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] Internet: http://h2o.enr.state.nc.us/ncwetlands
None Carolina
Naturally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
AMDeny
Page 2 of 2
June 20, 2005
will remain on hold as incomplete. This project has been assigned DWQ Project No. 05-0819. Please
refer to this project number in all future correspondence.
We have been informed by the U.S. Army Corps of Engineers that the overall "Amberly" development
will be considered as a single project for regulatory review purposes, although it will be permitted in
phases. Furthermore, it appears that impacts which have occurred on earlier phases of the Amberly
project (Amberly Development - SIMANCO, DWQ Project #95-0410, 401 Certification issued May 18,
1995 and subsequently modified August 20, 1996 and January 7, 1998) do not fully match the permitted
impacts. Also, maps associated with previous and currently proposed phases are inconsistent, possibly
reflecting re-design and long-term planning for the Amberly Development. In order to resolve the various
issues associated with this project, a meeting has been scheduled for Monday, July 18, 2005 at the
Archdale Building (14`h floor conference room #3) at 1:00 p.m. Those invited to attend this meeting
include staff from the Corps, DWQ, Wildlife Resources Commission, Town of Cary, the applicant(s) and
consultants involved. Please note that the purpose of this meeting is to begin resolving confusion (and
potential compliance problems) associated with this project. It is possible that further additional
information requests may be forwarded about any phase of Amberly following this meeting.
This letter only addresses the application review and does not authorize any impacts to wetlands or
waters. Please be aware that any impacts requested within your application are not authorized (at this
rime) by the DWQ. Please call Ms. Cyndi Karoly 919-733-1786 or Danny Smith at [phone](ext
353) if you have any questions regarding this matter.
Sincerely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permits Unit
CBKlcbk
cc: Eric Kulz, DWQ Raleigh Regional Office
Todd Tugwell, USACE, Raleigh Regulatory Field Office
Jean Manuele, USACE, Raleigh Regulatory Field Office File Copy
Shari Bryant, Wildlife Resources Commission
Danny Smith, Compliance Oversight
Central Files
File copies
Filename: 050393 050819Amberly(Chatham Wake)hold
©s-1)g 11
D-Yu iz-v LLA Pins
hp-2 MF2a.
North Carolina Wildlife Resources Commission
.Richard B. Hamilton, Executive Director
MEMORANDUM
TO: Mr. Todd Tugwell, Raleigh Regulatory Field Office p 0?1
U.S. rmy Corps of Engineers
JUN €> SOUS
FROM: Shari L. Bryant, Pi ont Region Coordinator
Habitat Conservation Program J)E1,R - WATER 00,;LITY
WETLANDS P,,@ STMIAWKI ER D 41 ti
DATE: 3 June 2005
SUBJECT: Public Notice for KB Home Raleigh-Durham, LLC for Construction of Parcels MF-2 and
MF-2A, Amberly Planned Unit Development, Wake County, North Carolina. Action ID
No. 200520751
Biologists with the North Carolina Wildlife Resources Commission (NC WRC) have reviewed the
subject document and we are familiar with the habitat values of the area. Our comments are provided in
accordance with provisions of the Clean Water Act of 1977 (as amended), the Fish and Wildlife
Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d), and the North Carolina General
Statutes (G.S. 113-131 et seq.).
The applicant proposes to place fill material, culverts and/or riprap into 374 linear feet of
intermittent stream channel and to convert a 1.717 acre farm pond into a non jurisdictional stormwater
retention pond. Tributaries to Panther Creek and Nancy Branch and two farm ponds are located on the
site. The proposed development is part of Amberly Planned Unit Development (PUD) and consists of
single family and multi-family residential units. Development plans for an additional parcel of Amberly
PUD (Amberly AR) are proposed under a separate public notice. No mitigation is proposed for this
project.
Panther Creek and Nancy Branch are headwater tributaries to the upper New Hope Creek arm of
B.E. Jordan Reservoir in the Cape Fear River basin. The upper New Hope Creek arm of B.E. Jordan
Reservoir is on the State's 303(d) list of impaired waters. The proposed project is adjacent to NCWRC
gamelands. There are records for the federal and state threatened bald eagle (Haliaeetus leucocephalus)
near the project site. Additionally, B.E. Jordan Reservoir supports a diverse fishery including largemouth
bass (Micropterus salmoides? crappie (Pomoxis spp.), sunfish (Lepomis spp.), catfish (Ictalurus spp.) and
striped bass (Moron saxatilis).
We are concerned about downstream water quality and aquatic habitat. Stream piping and
placing fill in aquatic resources can result in significant negative impacts to downstream areas and
eliminate fish and wildlife habitat. Stream piping reduces the infiltration of stormwater and associated
Mailing Address: Division of Inland Fisheries • 1721 Mail Service Center - Raleigh, NC 27699-1721
Telephone: [phone] • Fax: [phone]

Page 2
3 June 2005
KB Home Raleigh-Durham
Action ID No. 200520751
pollutants, as well as the dissipation of stream energy. Piping a stream and placing it underground
obviously removes both aquatic and terrestrial habitat. In addition, multiple studies have shown that
stream degradation occurs at 10% impervious (Schueler 1994; Arnold and Gibbons 1996; Doll et al.
2000; Mallin et al. 2000, May and Horner 2000; Stewart et al. 2000; Paul and Meyer 2001). This area
experiencing rapid urban growth and changes in land use from a primarily forested area to an urban
landscape may exacerbate channel degradation and sediment impacts to stream ecosystems due to
increased stormwater runoff and elevated flooding.
While we are supportive of the implementation of stormwater control measures, we are concerned
about the conversion of the farm pond into a non-jurisdictional stormwater retention pond. Generally, the
use of in-stream treatment systems for stormwater control for new development is discouraged unless
there are no practicable alternatives. No other stormwater control alternatives were presented in the
public notice. We feel the applicant should provide an alternatives analysis that shows stormwater control
measures that will not impact waters of the U.S. (e.g., upland stormwater retention) have been fully
evaluated; the analysis should demonstrate that the farm pond is the only practicable alternative for
stormwater control. Should the farm pond be used as a stormwater retention pond, we feel the applicant
should mitigate for length of stream and any wetlands impacted. Additionally, the pond should be
designed to meet minimum performance standards and an operation and maintenance plan should be
developed.
We cannot complete our review of the proposed project due to the informational needs regarding
an alternatives analysis for the use of the farm pond as a stormwater control measure. Should the permit
be issued, we recommend that the following conditions be incorporated into the permit to further
minimize impacts to fish and wildlife resources.
1. To minimize additional stream impacts, while retaining some measure of wildlife habitat, we
recommend that a 100-foot undisturbed, native, forested buffer along perennial streams, and a SO-
foot buffer along intermittent streams and wetlands. Maintaining undisturbed, forested buffers
along these areas will minimize impacts to fish and wildlife resources, water quality, and aquatic
habitat both within and downstream of the project area. In addition, wide riparian buffers are
helpful in maintaining stability of stream banks and for treatment of pollutants associated with
stormwater runoff. Whereas, a grassed buffer, particularly fescue, is a vegetated buffer but will
not provide the necessary and highly valuable functions as discussed for forested buffers.
2. We recommend that all remaining wetlands and streams on the site should be protected from
additional impacts by placing them in a permanent conservation easement to prohibit filling,
draining, flooding, and excavation.
3. Use bridges for all permanent roadway crossings of streams and associated wetlands to eliminate
the need to fill and culvert, where practicable. If culverts must be used, the culvert should be
designed to allow passage of aquatic organisms. Generally, this means that the culvert or pipe
invert is buried at least one foot below the natural streambed. If multiple cells are required, the
second and/or third cells should be placed so that their bottoms are at stream bankfull stage. This
will allow sufficient water depth in the culvert or pipe during normal flows to accommodate
movements of aquatic organisms. If culverts are long and sufficient slope exists, baffle systems
are recommended to trap gravel and provide resting areas for fish and other aquatic organisms. If
multiple pipes or cells are used, at least one pipe or box should be designed to remain dry during
normal flows to allow for wildlife passage. In addition, culverts or pipes should be situated so
that no channel realignment or widening is required. Widening of the stream channel at the inlet
Page 3
3 June 2005
KB Home Raleigh-Durham
Action ID No. 200520751
or outlet of structures usually causes a decrease in water velocity causing sediment deposition that
will require future maintenance. Finally, riprap should not be placed on the streambed.
4. To adequately protect streams, it is suggested that impervious surface is limited to less than 10%.
Suggested examples to accomplish the <10% impervious goal are using conventional designs at a
level of <10% imperviousness or using conservation clusters with higher densities, with dedicated
open space and other stormwater control measures to mimic the hydrograph consistent with an
impervious coverage of less than 100/a.
5. Locate sewers and other utilities as far away from creeks as functionally possible and minimize
stream crossings. It is preferable that sewers be located outside the riparian buffers.
6. A buffer of native trees and shrubs should remain or be planted around the pond to provide avian
and terrestrial habitat and to reduce exposure of the water surface to sunlight. These should
provide habitat benefits that could offset those functions lost by development, partially restore
aquatic habitats, reduce exposure of the water surface to sunlight thereby minimizing thermal
pollution, and provide essential summer and winter habitats.
7. We recommend that landscaping consist of non-invasive native species and LID technology.
Using native species instead of ornamentals should provide benefits by reducing the need for
fertilizers, herbicides, and pesticides. Additionally, native species should require less water.
Using LID technology in landscaping will not only help maintain the predevelopment hydrologic
regime, but also enhance the aesthetic and habitat value of the site.
8. Specialized efforts and techniques are implemented to reduce sediment runoff from construction
activities. Excessive silt and sediment loads can have numerous detrimental effects on aquatic
resources including destruction of spawning habitat, suffocation of eggs, and clogging of gills of
aquatic species.
9. A detailed mitigation plan should be submitted and approved before impacts occur.
Thank you for the opportunity to comment on this project. If we can provide further assistance,
please contact our office at [phone].
Literature cited
Arnold, C. L., and C. J. Gibbons. 1996. Impervious surface coverage--the emergence of a key
environmental indicator. Journal of the American Planning Association 62:243258.
Doll, B. A., D. E. Wise-Frederick, C. M. Buckner, S. D. Wilkerson, W. A. Hannan, and R. E. Smith.
2000. Hydraulic geometry relationships for urban streams throughout the piedmont of North
Carolina. Pages 299-304 in P. J. Wigington, Jr. and R. L. Beschta, eds. Proceedings of the
American Water Resources Association International Conference on riparian ecology and
management in multi-land use watersheds, Portland, Oregon.
Mallin, M. A., K. E. Williams, E. C. Esham, and R. P. Lowe. 2000. Effect of human development on
bacteriological water quality in coastal watersheds. Ecological Applications 10(4):1047-1056.
May, C. W. and R. R. Horner. 2000. The cumulative impacts of watershed urbanization on stream-
riparian ecosystems. Pages 281-286 in P. J. Wigington, Jr. and R. L. Beschta, eds. Proceedings
Page 4
3 June 2005
KB Home Raleigh-Durham
Action ID No. 200520751
of the American Water Resources Association International Conference on riparian ecology and
management in multi-land use watersheds, Portland, Oregon.
Pact, M. J., and J. L. Meyer. 2001. Streams in the urban landscape. Annual Review of Ecology and
Systematics 32:333-365.
Schueler, T. 1994. The importance of imperviousness. Watershed Protection Techniques. 1(3):100-
Stewart, J. S., D. M. Downes, L. Wang, J. A. Wierl, and R Bannerman. 2000. Influences of riparian
corridors on aquatic biota in agricultural watersheds. Pages 209-214 in P. J. Wigington, Jr. and
R. L. Beschta, eds. Proceedings of the American Water Resources Association International
Conference on riparian ecology and management in multi-land use watersheds, Portland, Oregon.
cc: Cyndi Karoly, DWQ
Q 50819 APR 1 2 2005
RALEIGH REGULATORY FIELD OFFICE
US ARMY CORPS OF ENGINEERS
&
North Carolina DENR - Division of Water Quality
INDIVIDUAL PERMIT APPLICATION
For
Amberly MF-2 & MF-2a
Cary, North Carolina

Soil & Environmental Consultants, PA
5U
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT
(33 CFR 3251
OMB APPROVAL NO. 0710-003
Expires October 1996
Public reporting burden for this collection of information is estimated to average 5 hours per response, including the time for reviewing instructions,
searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send
comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to
Department of Defense, Washington Headquarters Service Directories of Information Operations and Reports, 1215 Jefferson Davis Highway, Suite
1204, Arlington, VA 22202-4302= and to the Office of Management and Budget, Paperwork Reduction Project (0710-0003), Washington, DC 20503.
Please DO NOT RETURN your form to either of those addresses. Completed applications must be submitted to the District Engineer having jurisdiction
over the location of the proposed activity.
PRIVACY ACT STATEMENT
Authority: 33 USC 401, Section 10; 1413, Section 404. Principal Purpose: These laws required permits authorizing activities in, or affecting, navigable
waters of the United States, the discharge of dredged or fill material into waters of the United States, and the transportation of dredged material for the
purpose of dumping it into ocean waters. Routine Uses: Information provided on this from will be used in evaluating the application for a permit.
Disclosure: Disclosure of requested information is voluntary. If information is not provided, however, the permit application cannot be processed nor
can a permit be issues.
One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
application (see sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed
activity. An application that is not completed in full will be returned.
,.-M. =^,
/ITEMS 1 THRU 4 TO BE
1. APPLICATION NO. 12. FIELD OFFICE CODE 13. DATE A FCE ;EIZ ?nOC I 4. DATE APPLICATION COMPLETED
Z DOS 20 5 l L -,&A v- R?,- _ (Z A '[ U J
(ITEMS BELOW TO BE F#4,A 1Ai` WttP,4lWM? vivin nrrrnn
aaaar w a AV"
5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE Ian agent is not required)
KB Home Raleigh-Durham, LLC Sean Clark, Soil & Environmental Consultants, P.A.
Attn: Pete Sullivan Project Manager / Environmental Scientist
6. APPLICANT'S ADDRESS 9. AGENT'S ADDRESS
1100 Navahoe Drive 11010 Raven Ridge Road
Raleigh, NC 27609 Raleigh N.C. 27614
7. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
a. Residence NA a. Residence 919-270-2738 (cell)
b. Business 919-871-0092 b. Business 919-846-5900
11. STATEMENT OF AUTHORIZATION
I hereby authorize, to act in my behalf as my agent in the processing of this application and to
furnish, upon request, supplemental information in support of this permit application.
APPLI ANT'S SIGNATURE ?;YCC7?f Nj??(yy ?$Pt' DATE IBS
NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY
12. PROJECT NAME OR TITLE Iseeinstructions)
Amberly P.U.D. Parcels MF-2 and MF-2a
13. NAME OF WATERBODY, IF KNOWN Gt applicable) UT to Panther Creek 114. PROJECT STREET ADDRESS Inapplicable)
15. LOCATION OF THE PROJECT
COUNTY Wake STATE NC
Not Applicable
16. OTHER LOCATION DESCRIPTIONS, IF KNOWN, Iseeinstructions)
17. DIRECTIONS TO THE SITE
The project site is located immediately north of Yates Store Road (SR 1734) and immediately east of Panther Creek in what is now the Town of Cary.
ENG. FORM 4345, Feb 94 EDITION OF SEPT 91 IS OBSOLETE (Proponent: CECW-OR)
18. Nature of Activity /Description of project, include all features)
The proposed project is a residential subdivision with single and multi family portions. Typical utilities (i.e. roads, sewer, electric, etc.) will be installed to
the subject property. As stated above the area pertaining to this application is a smaller portion of the Amberly Subdivision, which the USACE has
considered to be one project. Proposed impacts are as follows: a) 292 linear feet of intermittent/unimportant stream channel resulting from the construction
of a road and lot fill, b) 50 linear feet of intermittent/unimportant stream impact resulting from the installation of a Town of Cary greenway trail, c) 77
linear feet of intermittent/ unimportant stream channel resulting from lot fill, and d) 1.717 acres of open water impact resulting from the conversion of an
irrigation pond to a stormwater pond.
19. . Project Purpose (Describe the reason or purpose of the project, see instructions)
The purpose of the project is to provide additional housing for the area.
USE BLOCKS 20-22 IF DREDGED AND/OR FILL MATERIAL IS TO BE DISCHARGED
20. Reason(s) for Discharge
The proposed impacts are required to construct roads, greenways, lots and stormwater as shown on the attached impact maps.
21. Type(s) of material Being Discharged and the Amount of Each Type in Cubic Yards
Construction grade fill will be used on the site. Fill available from onsite grading will be utilized as much as possible. Cubic yardage of fill required for
the proposed impacts are as follows: Impact Area A = 530 yd3, Impact Area B = 15 yd3, and Impact Area C = 114 yd3. The conversion of the existing
1.717-acre irrigation pond to the stormwater pond will not require fill within the currently jurisdictional area.
22. Surface Area in Acres of Wetlands or Other Waters Filled (see instructions)
Impacts resulting from fill within MF-2 and MF-2A total 0.0432 acre. This total includes stream areas as well as wetland areas. Although the pond is not
being filled, by the USACE and US EPA's current definitions, the pond's surface area of 1.717 acres will be impacted.
23. Is Any Portion of the Work Already Complete? Yes No X IF YES, DESCRIBE THE COMPLETED WORK
The site has been partially graded primarily due to adjacent road construction of the Yates Store Road Extention. No impacts to wetlands within MF-2 or
MF2A have occurred. The areas that have been partially graded are within what was a pasture (i.e. not forested).
24. Addresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (if more than can be entered here,
please attach a supplemental list).
Please see attachement.
25. List of Other Certifications or Approvals/Denials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL* IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATE DENIED
* Would include but is not restricted to zoning, building and flood plain permits.
26. Application is hereby made for a permit or permits to authorize the work described in this application. I certify that the information in this
application is complete and accurate. 1 further certify that I possess the authority to undertake the work described herein or am acting as the duly
auth ized agen?j of a applicant.
APPLICANT DATE SIGNATURE OF AGENT DATE
IGNATU E OF
?.rc(10,' o L4vol , veloowX kB Hoj,, Weli "rhA"- `Lc
The application must be si ned by the person who de res o undertake the proposed activity (applicant) or it may be signed by a duly authorized
agent if the statement in block 11 has been filled out and signed.
18 U.S.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States knowingly
and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or fraudulent statements or
representations or makes or uses any false writing or document knowing same to contain any false, fictitious or fraudulent statements or entry,
shall be fined not more than $10,000 or imprisoned not more than five years or both.
RECEIVED
TABLE OF CONTENTS
APR 12 2005
1. PURPOSE AND NEED STATEMENT ............................................................EIp I;E(}i??Pp$Y2FIELD OFFICE
2. WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS ............................................... 2
3. PUBLIC INTEREST ISSUES ............................................................................................................ 2
3.1 CONSERVATION: ........................................................................................................................... 3
3.2 WATER QUALITY: ........................................................................................................................ 3
3.3 WETLANDS: .................................................................................................................................. 3
3.4 FLOOD HAZARD: .......................................................................................................................... 4
3.5 FLOODPLAIN VALUE: ................................................................................................................... 4
3.6 LAND USE: ................................................................................................................................... 4
3.7 RECREATION: ............................................................................................................................... 4
3.8 SAFETY: ....................................................................................................................................... 4
3.9 AESTHETICS: ................................................................................................................................ 5
3.10 HISTORIC PROPERTIES: ................................................................................................................. 5
3.11 WATER SUPPLY: ........................................................................................................................... 5
3.12 NAVIGATION: ............................................................................................................................... 6
3.13 ENERGY NEEDS: ........................................................................................................................... 6
3.14 MINERALNEEDS :......................................................................................................................... 6
3.15 ECONOMICS: ................................................................................................................................. 6
3.16 FISH & WILDLIFE VALUES: .......................................................................................................... 6
3.17 SHORE EROSION & ACCRETION: .................................................................................................. 7
3.18 FOOD & FIBER PRODUCTION: ....................................................................................................... 7
3.19 ENVIRONMENTAL CONCERNS: ...................................................................................................... 7
3.20 PROPERTY OWNERSHIP: ............................................................................................................... 8
3.21 NEEDS AND WELFARE OF THE PEOPLE: ........................................................................................ 8
4. MITIGATION .....................................................................................................................................8
Attachment 1 USGS Quad Site Vicinity Map
Attachment 2 Wake County Soil Survey Site Vicinity Map
Attachment 3 Proposed Site Plan / Impact Maps (4 sheets)
Attachment 4 Parcel Map Depicting Current Landowners and Adjacent Land Owners
Attachment 5 Stormwater Management Plan
r,
1. PURPOSE AND NEED STATEMENT
The purpose of the proposed project is to construct a residential subdivision that includes
both single-family and multi-family components to meet the demand for housing in the
area. The property is included in the Town of Cary and is within an area that is situated
close to Raleigh and the Research Triangle Park. This area has experienced a great deal
of growth in the past 5 to 8 years and the demand for adequate housing has increased.
The subject property (the Project) is considered a portion of the Amberly project and is
designated as MF-2 and TNIF-2a. The remaining portion of the Amberly Project will be
permitted by others and will be developed by others as well so their final impact totals are
not currently kno«n.
2. WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS
The project site contains approximately 0.4233 acre of wetlands, a 1.717- acre pond, and
four intermittent/unimportant stream channels. The Project will not impact any wetland
areas but does propose fill in 419 linear feet of intermittent/unimportant stream and
converts the existing irrigation pond to a stormwater pond.
Wetland areas were avoided completely. A potential road crossing downstream of
Impact Area D (the pond) would have further connected the northern portion of the
property to the southern portion, however this was abandoned and the potential wetland
and stream impacts avoided. In a similar effort to avoid and minimize wetland impacts,
the greenway trail that is required by the Town of Cary along the western property line
was routed in such a way so as to avoid two large wetland areas adjacent to the stream
channel (see Sheet 2 of Impact Maps). The eastern portion of the project that is east of
the rerouted Yates Store Road avoids stream and wetland impacts completely.
3. PUBLIC INTEREST ISSUES
In a document provided by the U.S. Corps of Engineers titled "Wetlands & Corps
Wetland Regulations" and dated August 13, 2001, the Corps of Engineers lists 21
specific factors that will be reviewed related to Public Interest. These items are as
follows:
Conser-,ution
Water Quality
Wetlands
Flood Hazard
Floodplain Value
Land Use
Recreation
Safety
Aesthetics
Historic Properties
Water Supply
Navigation
Energy Needs
Mineral Needs
Economics
Fish & Wildlife Values
Shore Erosion and Accretion
Food & Fiber Production
Environmental Concerns
Property Ownership
Needs and Welfare of the People
Responses to each of the 21 Public Interest Issues are presented below.
2
3.1 Conservation:
The client requested a detailed wetland delineation prior to site plan development in order
to avoid and minimize impacts to jurisdictional areas as much as possible. The site plan
has avoided all wetland areas as well as the majority of the streams on site. Riparian
buffers have been placed along streams below the two ponds that occur on the project's
property which will provide some wildlife cover and act as small-scale wildlife corridors.
3.2 Water Quality:
The Site is located in the Cape Fear River Basin in DWQ subbasin 03-06-05 and in
USGS Hydrologic Unit Code 03030002. Stormwater devices have been placed
throughout the property to comply with the Town of Cary's nitrogen reduction
requirements as well as DWQ's 85% TSS requirements. Please see Attachment 5 for
more information pertaining to the stormwater devices. Impact Area D will convert an
existing irrigation pond to a stormwater pond in an effort to protect downstream water
quality.
The western portion of the property drains directly to Panther Creek. The eastern portion
of the property drains to Morris Branch and the large lake that dams up Morris Branch.
Morris Branch then drains into Panther Creek. Panther Creek and Morris Branch are
classified as WS-IV, NSW waters by NCDENR.
3.3 Wetlands:
S&EC personnel conducted a detailed wetland delineation of the Site. Ms. Amanda
Jones of the US Army Corps of Engineers reviewed the site and approved the delineation
in 2002 (Action ID #200220442). As mentioned above a total of 0.4233 acre of wetlands
are located within the Project's boundaries and are being completely avoided. Based on
the proposed site plan, only streams and a surface water (Impact Area D) of 1.717 acres
in size will be permanently impacted by the development. The proposed impacts will
result from the installation of roads and lot fill (Impact Areas A and C), the installation of
a Town of Cary greenway trail (Impact Area B), and the conversion of an existing
irrigation pond to a stormwater pond (Impact Area D). The remaining streams and
wetlands as well as an isolated (i.e. Nonjurisdictional) pond will be avoided.
r'
3.4 Flood Hazard:
The Project is located completely outside of any 100-year Floodplain.
3.5 Floodplain Value:
The streams within the project area that contain floodplains are buffered. The small
intermittent streams with impacts depicted on sheets 1 and 3 on the attached impact maps
are at the extreme top of the drainage basins and do not have floodplains associated with
them. The impact depicted on sheet 2 of the impact maps does occur within that stream
feature's floodplain (not a CANLA, mapped floodplain) and the pipes have been sized
accordingly.
3.6 Land Use:
Land use in the surrounding area consists of primarily single-family residential
subdivisions. A partially forested tract exists immediately north of the subject area of the
property and was determined to be part of the same project with regards to 401/404
permitting. This additional portion of Amberly is being developed by Sandler at
Amberly, LLC (GS Carolina), a separate entity from the applicant of this project. The
northern portion of Amberly will be a combination of single-family residential
subdivisions and a retirement community.
The project area has in the past been used primarily as pasture land and has therefore
been primarily in herbaceous cover. Only the drainages below the ponds have been
forested and they will remain so.
3.7 Recreation:
There are no designated scenic or recreational areas currently within the Project's area.
As mentioned above, the proposed Impact Area B will result from the installation of a
greenway trail that will run along the western property line. This greenway trail will tie
into other Town of Cary greenway trails and can be utilized by the Project's residents as
well as the general public.
3.8 Safety
Entrances to the community will meet the standards of the North Carolina Department of
Transportation. For example all intersections onto Yates store Road will occur at 90°
angles. Construction practices will follow industry and OSHA standards for safety. The
site is within the Town of Cary's jurisdiction and will therefore be inspected regularly to
certify that construction practices etc. meet specified standards.
4
3.9 Aesthetics:
The Project has been designed to be as aesthetically pleasing as possible with regards to
landscaping, architecture, etc. Although the pond depicted as Impact Area D will be
utilized as a stormwater device it will also have a great deal of aesthetic value for the
property. Likewise a nonjurisdictional pond on the eastern portion of the property will
also remain in place as an aesthetic feature. The required riparian buffers that exist along
three of the stream features on the property will further enhance the development.
3.10 Historic Properties:
NC SHPO maintains records of locations of buildings, structures, and objects that are
listed by local governments as historic landmarks or that are listed or eligible for listing
on the National Register of Historic Places. On January 15, 2004, S&EC, PA conducted
a review of records at the NC State Historic Preservation Office (SHPO) and the North
Carolina Office of State Archaeology (OSA) for sites and structures of archaeological
and historical significance on the project site. Two sites were found that were classified
as eligible for listing in the National Register of Historic Preservation by the NC SHPO
are located in the vicinity of Amberly: the William Marcom Farm and the John D.
k
Horton Farm.
According to NC SHPO records, the William Marcom Farm "is eligible for listing in the
National Register under Criterion A as an intact example of the development of a
Chatham County farm complex, and under Criterion C for architecture". NC SHPO
records state that the John Horton Farm contained "numerous outbuildings which
retained their architectural integrity" when it was surveyed and that the property is
believed to be eligible "under Criterion A for social history and Criterion C for
architecture."
The Office of State Archaeology maintains information of sites of archaeological
importance in North Carolina. The Office of State Archeology has no record of sites of
archaeological importance on or adjacent to the project site. According to Office of
State Archaeology records, an archaeological survey has never been performed on the
Amberly project site.
3.11 Water Supply:
Water will be provided by the Town of Cary as will sewer service. Older homes in the
area primarily are served by individual wells. The newer residential developments in the
area, such as Cary Park to the south, are provided water by the Town of Cary also. The
Town of Cary's main source of drinking water is Jordan Lake, which this site drains to.
As stated above, Panther Creek and Morris Branch are classified as WS-IV, NSW waters
by NCDENR.
5
r'.
3.12 Navigation:
No navigable waters are found on this site.
3.13 Energy Needs:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect the energy status of the County.
3.14 11ineral Needs:
This public interest issue is not applicable to this application, as the Briar Chapel Project
will not affect the need for minerals in the area.
3.15 Economics:
The Fiscal Impact Analysis has been completed for this project. The project is expected
to generate significant tax revenue. More immediately the project will provide jobs for
the area such as construction and landscaping work.
3.16 Fish & Wildlife Values:
The site has historically been used as pastureland and with the exception of the drainages
on property has been primarily in herbaceous cover. Species that require large forested
tracts will not be impacted because the Project's area is not being converted from a large
forested tract. Wildlife that utilize disturbed areas will be impacted the most by this
project. Species such as Robins, Mockingbird, Black snake, Field mouse, etc. that
require small areas of habitat or that are common to both disturbed areas and areas
occupied by humans will likely be only temporarily displaced.
At the time of delineation the streams with direct impacts did not contain fish. Although
the two ponds onsite were not evaluated for the presence of fish, if any exist they were
most likely placed there by previous landowners and did not occur there naturally. The
pond identified in As Impact Area D will be drained so that the dam can be reconstructed.
At this point any fish within the pond will be killed. The other isolated pond on the
property will not be altered so any fish that may occur within the pond will not be
harmed. Amphibians will still be able to utilize both ponds and the wetland and stream
areas that remain on the property after construction. The stream and wetland areas o the
property without proposed impacts will be buffered and therefore will enjoy the same
level of habitat protection that currently exists.
6
On January 15, 2004, S&EC, PA reviewed current NC Natural Heritage Program (NHP)
database files for known populations or records of Federally-listed Threatened or
Endangered species in the vicinity of the Amberly project. The NHP has no record of
occurrence of any Federally-listed Threatened or Endangered species within the
boundaries of Amberly. The nearest known occurrence of any Federally-listed
Threatened or Endangered species is for the Bald Eagle (Haliaeetus leucocephalus). The
NHP has records of the occurrence of the Bald Eagle in four locations in the vicinity of
Everett B. Jordan Lake, greater than 2 miles west of the project. The Bald Eagle
typically requires large areas of open water such as Lake Jordan. Although the Pond on
Morris Branch is rather large, habitat is not likely to be sufficient to support the Bald
Eagle. The Project is not expected to have any direct adverse effect on federally listed
species. No other occurrences of Endangered animal species are located within 5 miles
of the project and no occurrences of Endangered plant species are located within 2 miles
of the project.
3.17 Shore Erosion & Accretion:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect shore erosion or accretion.
3.18 Food & Fiber Production:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not be producing any food or fiber and has not been in agriculture in recent history.
3.19 Environmental Concerns:
Noise
This region of the county is currently being developed but has in the past been primarily
used for agriculture or timber production. In the past, the majority of the noise producing
activities in the area are directly related to localized farming and logging operations;
therefore the noise generated on site is primarily the result of the operation of heavy
tillage equipment and motor vehicles. Recently due to the development of residential
neighborhoods, noise-generating activities have been due to grading and construction of
roads and housing.
Noise levels on the Project are expected to increase during the construction phase of the
project. Increased noise levels will be as a result of commonly used mechanical
equipment that will be utilized to grade the Site, road construction and building
construction. Construction is normally limited to daylight hours when loud noises are
more tolerable. Every reasonable effort will be made to minimize construction noise.
7
Immediately following completion of the project, noise levels will be similar to other
residential areas and will result primarily from cars etc. The preserved riparian buffers on
the property will help reduce this noise to surrounding areas.
Erosion and Sedimentation
The attached Water Quality Report prepared by Withers & Ravenel provides the
locations, calculations and surface areas for the proposed stormwater BMP devices. All
stormwater runoff on the Project will be directed to one of these devices, which will
greatly reduce if not eliminate erosion and sedimentation issues resulting from the
Project. During construction of the Project, temporary basins will also be used to further
isolate any potential problems. As previously mentioned, the eastern portion of the
property ultimately drains to the large pond that is on Morris Branch. Although the
stormwater will be retained prior to reaching Morris Branch, the large pond that was
constructed on Morris Branch will further reduce the likelihood of sediment entering the
stream system off property. The stormwater BMPs will be required to meet the DWQ's
requirements of removal of 85 percent of the total suspended solids (TSS). During
construction, erosion and sedimentation may occur during rain events.
3.20 Property Ownership:
Please see attached parcel data on Attachment 4.
3.21 Needs and Welfare of the People:
The proposed project includes designated sites for community infrastructure such as
public roads and a section of the Town's greenway system. The Project will be within
the Town of Cary's jurisdiction and therefore will be provided services by the Town's
Fire Department, Police Department, etc. Children living within this proposed
development will attend Wake County Schools.
The proposed Stormwater management plan for the Project will ensure that runoff from
the site does not negatively affect the surrounding communities or the drinking water that
is taken from the Lake downstream of the Project.
6. MITIGATION
No wetland impacts are proposed therefore no wetland mitigation is proposed. Although
the jurisdictional irrigation pond will be converted to a stormwater pond and thus be
removed from jurisdiction, the pond itself will remain in place and therefore no
mitigation is proposed for this impact. No impacts are proposed to stream channels that
are considered perennial or that demonstrate important aquatic function, therefore no
stream mitigation is proposed. If stream mitigation is required, a payment to the NCEEP
is proposed.

Soil & Environmental Consultants,
PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
(,919 846-5900 • [phone]
ji r.SwWEC. com
APR 12 2005

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1089 i roject No. Figure 2 - Soil Survey Map
Amberl Soil & Environmental Consultants, PA
Project Mgr.: (parcels MF-2 & MF-2A) 11010 Raven Ridge Rd.- Raleigh, NC 27614
SC [phone] ¦ [phone]
Chatham & Wake Counties, NC Web Page: www.SandEC.com
Scale:
1" = 1,320'
04/11/05 Wake County Soil Survey
Sheets 35 & 45, Nov. 1970
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Sandler at Amberly LLC
448 Viking Drive, Suite 220
Virginia Beach, VA 23452-7331
Sandler at Amberly LLC
448 Viking Drive, Suite 220
Virginia Beach, VA 23452-7331
Lillie H. Fowler
2109 Yates Store Road
Cary, NC 27519-9568
William Elton Mills & Billie Perry
7711 Carpenter Fire Station Road
Cary, NC 27519-8626
Pulte Home Corporation
801 Corporate Center Drive, Suite 118
Raleigh, NC 27607-5073
Pulte Home Corporation
801 Corporate Center Drive, Suite 118
Raleigh, NC 27607-5073
Douglas Olive & Ramona Kelly
1800 Yates Store Road
Cary, NC 27519-9561
.ZQL5 101 ajeldwal esn
8)
Carey D. & Sandra H. Holt
1732 Yates Store Road
Cary, NC 27519-9559
Thomas J. & Nancy O. Harvey
1720 Yates Store Road
Cary, NC 27519-9559
b
Joseph Emmett & Delores Bradshaw
1708 Yates Store Road
Cary, NC 27519-9559
i?
Elizabeth C. Nowell Family Ltd PTNSP
C/o Elizabeth C. Nowell
900 East Chatham Street
Cary, NC 27511-6950
9
Michael J. & Eva G. Lloyd
1632 Yates Store Road
Cary, NC 27519-2557
13
David A. & Dena C. Wrenn
1504 Yates Store Road
Apex, NC 27523-7380
846
United States of America
415 North Edgeworth Street
Greensboro, NC 27401-2182
wlsVaaUS p884 LlloowS
[Fwd: Amberly]
Subject: [Fwd: Amberly]
From: Cyndi Karoly <[e-mail]>
Date: Sat, 28 May 2005 09:26:24 -0400
To: Ian McMillan <[e-mail]>
Subject: Amberly
From: Eric Kulz <[e-mail]>
Date: Thu, 26 May 2005 15:53:52 -0400
To: [e-mail], Cyndi Karoly <[e-mail]>
Cyndi/Debbie:
I was out at Amberly in western Wake County today with Ken and folks from the Town of
Cary, and we ran into the developer, who said they had submitted their IP application
several weeks ago. I never got a copy of the application, and would like to look it
over, as I am kind of keeping an eye on that whole area over there. Could you all
send me a copy of the application?
Thanks a lot,
eric
Eric Kulz <Eric. Kulz @ ncmail.net>
Environmental Specialist III
Surface Water Protection
NC Division of Water Quality
--------- --------- -- ------ - -
Content-Type: message/rfc822
Amberly;
Content-Encoding: 7bit
I of 1 5/31/2005 9:09 AN
5/27/05
Cyndi:
RE: EP project/PN (new)
05-0393 issued 5/20/05
Sorry to leave this one for you but I could not tell if what was recvd 5/25/05 (Amberly
A/R) went with the issued DWQ project 050393. Rob indicated that perhaps the COE
was bumping 05-0393 up from a NW 12 & 39 to an IP.
Did not want to set up with another number, etc if related. 0 ` ` o r
Some of the descriptions are the same but the maps of the site look different /
Applicant =the same for both
Agent - different S&EC vs Chas H Sells
Waterbodies different - UT Panther Branch vs Nancy Br/Morris Br
St info overlaps - North of New Hope Church Rd & west of Yates Store Rd vs
McCrimmon Parkway/Yates Store Rd
Descriptions somewhat different: Single family residential community & infrastructure
vs that plus commercial site
4 '
050819
US Army Corps PUBLIC NOTICE
Of Engineers
Wilmington District
Issue Date: May 6, 2005
Comment Deadline: June 6, 2005
Corps Action ID #: 200520751
All interested parties are herby advised that the Wilmington District, Corps of Engineers
(Corps) has received an application for work within jurisdictional waters of the United
States. Specific plans and location information are described below and shown on the
attached plans. This Public Notice and all attached plans are also available on the
Wilmington District Web Site at www.saw.usace.army.mil/wetlands
Applicant: KB Home Raleigh - Durham, LLC
Attn: Mr. Pete Sullivan
1100 Navahoe Drive
Raleigh, North Carolina 27609 LL?? D
Agent: Soil & Environmental Consultants, Inc. MAY 9 2005
Attn: Mr. Sean Clark ? ER Query
11010 Raven Ridge Road ?g?NCN
Raleigh, North Carolina 27614
Authority
The Corps will evaluate this application and a decide whether to issue, conditionally
issue, or deny the proposed work pursuant to the applicable procedures of Section 404 of
the Clean Water Act.
Location
The project is approximately 90 acres in size and is located to the north and west of the
intersection of Yates Store Road and north of Carpenter Fire Station Road, east of
Panther Creek, in Cary, Wake County, North Carolina. Coordinates (in decimal degrees)
for the site are 35.8240 ° North, 78.9145 ° West. The site contains tributaries of Panther
Creek and Morris Branch, and adjacent wetlands, in the Cape Fear River Basin. The
project, identified as parcels MF-2 and MF-2A, are located within the Amberly Planned
Unit Development (PUD).
?a
Existing Site Conditions
The site is located in a rapidly developing rural setting. Numerous new residential
developments are located near the proposed project. A sewer pump station and sanitary
server trunk lines have recently been constructed near the site to provide sewer service to
the vicinity. Currently, the site is made up of abandoned agricultural fields and
forestland. Several tributaries to Panther Creek and Nancy Branch and two farm ponds
are also located on the property. Grading operations have commenced on high ground
portions of the site.
Applicant's Stated Purpose
As stated by the applicant, the purpose of the project is to provide additional housing for
the growing Cary area. The development will contain both single-family and multi-
family residential areas.
Project Description
The project is a residential development that will include construction of single and
multi-family units. Development of the site will require extensive clearing, grading,
excavation, and fill necessary for the construction of homes, lots, roads, stormwater
facilities, and infrastructure. Heavy equipment, including graders, pan scrapers,
excavators, bull dozers, etc. will be used for the construction of the project. Proposed
impacts to waters of the U.S. total 374 linear feet (0.0432 acre) of intermittent stream
channel resulting from the placement of fill material, culverts, and/or riprap. The impacts
are proposed in three separate locations as follows: a) 292 linear feet of intermittent
stream channel for the construction of a road and lots; b) 50 linear feet of intermittent
stream channel for the construction of a greenway trail; and c) 77 linear feet of
intermittent stream channel for the construction of lots. Development plans also call for
the conversion of a 1.717-acre farm pond into a non jurisdictional stormwater retention
pond. No direct impacts will result from this conversion, however the work will result in
the permanent loss of 1.717 acres of open waters of the U.S. as the resulting pond will no
longer be subject to Section 404 of the Clean Water Act. The applicant has not proposed
mitigation for the proposed impacts associated with the development. Plans included
with this notice that show the overall proposed site layout as well as the details for impact
areas a, b, and c.
Development plans for an additional parcel of Amberly PUD, identified as Amberly AR,
were submitted by Sandler At Amberly, LLC and are currently under review. Plans for
Amberly AR will be distributed by public notice (Corps Action ID #: 200520319)
following submittal of a complete application, and they will be available on the
Wilmington District Web Site at xL-x7%w.saw.usace.armv.miUwetlands. Impacts associated
with Amberly AR and with the current proposal will be reviewed as a single and
complete project for the purposes of the Corps permit evaluation procedures.

Other Required Authorizations
This notice and all applicable application materials are being forwarded to the appropriate
State agencies for review. The Corps will generally not make a final permit decision
until the North Carolina Division of Water Quality (NCDWQ) issues, denies, or waives
State certification required by Section 401 of the Clean Water Act (PL 92-500). The
receipt of the application and this public notice in the NCDWQ Central Office in Raleigh
serves as application to the NCDWQ for certification. A waiver will be deemed to occur
if the NCDWQ fails to act on this request for certification within sixty days of the date of
the receipt of this notice in the NCDWQ Central Office. Additional information
regarding the Clean Water Act certification may be reviewed at the NCDWQ Central
Office, 401 Oversight and Express Permits Unit, 2321 Crabtree Boulevard, Raleigh,
North Carolina 27604-2260. All persons desiring to make comments regarding the
application for certification under Section 401 of the Clean Water Act should do so in
writing delivered to the North Carolina Division of Water Quality (NCDWQ), 1650 Mail
Service Center, Raleigh, North Carolina 27699-1650 Attention: Ms Cyndi Karoly by
1X4, 2005.
Essential Fish Habitat
This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the
Magnuson-Stevens Fishery Conservation and Management Act. The Corps' initial
determination is that the proposed project will not adversely impact EFH or associated
fisheries managed by the South Atlantic or Mid Atlantic Fishery Management Councils
or the National Marine Fisheries Service.
Cultural Resources
The Corps has consulted the latest published version of the National Register of Historic
Places and is not aware that any registered properties, or properties listed as being
eligible for inclusion therein are located within the project area or will be affected by the
proposed work. Presently, unknown archeological, scientific, prehistoric, or historical
data may be located within the project area and/or could be affected by the proposed
work.
Endangered Species
The Corps has reviewed the project area, examined all information provided by the
applicant and consulted the latest North Carolina Natural Heritage Database. Based on
available information, the Corps has determined pursuant to the Endangered Species Act
of 1973, that the proposed project will have no effect on federally listed endangered or
threatened species or their formally designated critical habitat.
Evaluation
The decision whether to issue a permit will be based on an evaluation of the probable
impacts, including cumulative impacts, of the proposed activity on the public interest.
That decision will reflect the national concern for both protection and utilization of
important resources. The benefit which reasonably may be expected to accrue from the
proposal must be balanced against its reasonably foreseeable detriments. All factors
which may be relevant to the proposal will be considered including the cumulative effects
thereof, among those are conservation, economics, aesthetics, general environmental
concerns, wetlands, historic properties, fish and wildlife values, flood hazards, flood plain
values (in accordance with Executive Order 11988), land use, navigation, shoreline
erosion and accretion, recreation, water supply and conservation, water quality, energy
needs, safety, food and fiber production, mineral needs, considerations of property
ownership, and, in general, the needs and welfare of the people. For activities involving
the dischar_ae of dredged or fill materials in waters of the United States, the evaluation of
the impact of the activity on the public interest will include application of the
Environmental Protection Agency's 404(b)(1) guidelines.
Commenting Information
The Corps is soliciting comments from the public; Federal, State and local agencies and
officials, including any consolidate State Viewpoint or,vritten position of the Governor;
Indian Tribes and other interested parties in order to consider and evaluate the impacts of
this proposed activity. Any comments received will be considered by the Corps to
determine whether to issue, modify, condition or deny a permit for this proposal. To
make this decision, comments are used to assess impacts on endangered species, historic
properties, water quality, general environmental effects and the other public interest
factors listed above. Comments are used in the preparation of an Environmental
Assessment (EA) and/or an Environmental Impact Statement (EIS) pursuant to the
National Environmental Policy Act (NEPA). Comments are also used to determine the
need for a public hearing and to determine the overall public interest of the proposed
activity.
Any person may request, in writing, within the comment period specified in this notice,
that a public hearing be held to consider the application. Requests for public hearings
shall state, with particularity, the reasons for holding a public hearing. Requests for a
public hearing shall be granted, unless the District Engineer determines that the issues
raised are insubstantial or there is otherwise no valid interest to be served by a hearing.
Written comments pertinent to the proposed work, as outlined above, will be received
by the Corps of Engineers, Wilmington District, until 5pm, June 6, 2005. Comments
should be submitted to Todd Tugwell, Raleigh Regulatory Field Office, 6508 Falls of the
Neuse Road, Suite 120, Raleigh, NC 27615.

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-SID # 200520751 Wake County, North Carolina
U Home Raleigh-Durham, LLC May 6, 2005
i ' 1100 Navaboe Drive Sheet 4 of 6 i
Leigh, NC 27609 -
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ID # 200520751 Wake County, North Carolina
co Home Raleigh-Durham, LLC May 6, 2005
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05Q619
WITHERS RAVEN EL APR 12 2005
RALEIGH REGULATORY FIELD OFFICE
WATER QUALITY REPORT
SUPPORTING DESIGN CALCULATIONS
AMBERLY P.U.D.
PORTIONS OF PARCELS MF-2 AND MF-2a
Cary, North Carolina
Prepared For:
KB-Home Raleigh-Durham, LLC
iloo Navahoe Drive
Raleigh, NC
Attn: Pete Sullivan
Prepared By:
WITHERS & RAVENEL, INC
sit MacKenan Drive
Cary, North Carolina 27511
February 2005
W&R Project No. 204020
INTRODUCTION
The purpose of this study is to document required water quality stormwater calculations for portions
of parcels MF-2 and MF-2a of the proposed Amberly subdivision in Cary, NC. The goal is to provide
• detention structures which are designed in accordance with requirements set forth by the Division of
Water Quality.
METHODOLOGY
The stormwater study was conducted using proposed contours as shown on the construction
drawings and do not reflect as-built contours. There are four W stormwater BMP's proposed at this
time forthese portions of Amberly. Three wet ponds will be constructed and one existing pond will
be retrofitted with a proposed riser structure. Additional BMP's may be added to the site during
future phases, and design documentation will be provided at that time. The BMP's included in this
• report cover Phases 1, II and Ill.
A portion of Phase 111 will be piped into a stormwater wetland to be constructed by others. The area
• is included within this report for documentation only. West BMP 3 will be constructed offsite and
Withers and Ravenel will provide necessary watershed data as requested by the designing engineer.
The scope of work included the following analyses:
Hydrolol y
• ? Simulation of the in i-inch of runoff for each drainage area.
Hydraulic
? Determination of the drainage area characteristics for each basin
• ? Sizing a drawdown orifice for the i' i-inch of post development runoff in each proposed
stormwater BMP
The results of the hydrology calculations are included in the attached spreadsheets. The hydraulic
• design requires the development of stage-storage functions for each pond. The stage storage
functions for each pond were determined using Haestead Methods PondPack modeling software.
• CONCLUSIONS
Each proposed pond and associated outlet structure is sized in accordance with DWQ regulations
for stormwater Best Management Practices.
• Amberly W&R Project 204020
DWQ Report February 2005
< \ 4\ 0\04020\H&H\BMPSheets.dwg, EAST BMP SHEET, 2/3/2005 1:53:47 PM, WITHERS & RAVENEL, INC.
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Amberly East 1
Project Name: Amberly Project #: 204020
Ci / tate: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Remnval Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dept
3.0 . 4.0 5.0 6.0 h (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 EAST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 5.45 40 2.2
0 0.0
Totals 5.45 2.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 285 286 287 288 289 290 291
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 4107.0546 3394.8486 2967.525 2492.721 2136.618 1946.696 1827.9954
SA Provided 5501 6418 7392 8421 9509 10653 11853
Normal pool depth - 3.00 ft
Surface are req'd - 0.094 acres
Normal pool elevation a 285.0 feet
Surface area provided - 0.126 acres
5501 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv m Runoff coefficient, inJin.
I = Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1 -inch precipitation:
Runoff volume, S a (Design rainfall) (Rv) (Drainage Area)
S = 0.186 acre-ft
8111 cu. ft.
Water quality pool elevation= 287.50 feet
Storage volume provided - 0.386 acre-ft
16814 cu. ft.
Amberly - Phase 1 (EAST)
Stormwater Management
WR Project #204020
July 2004

•
•
Amberly East 2
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 2 EAST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 15.53 40 6.2
0 0.0
Totals 15.53 6.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 266 267 268 269 270 271 272
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 11703.222 9673.761 8456.085 7103.111 6088.381 5547.192 5208.948
SA Provided 6337.110 7613.852 9784.012 11406.186 13084.117 14819.112 16611.170
Normal Pool 267.5 267.6 267.7 267.8 267.9 268
SA/DA 1.34 1.32 1.30 1.29 1.27 1.25
SA Required 9064.923 8943.155 8821.388 8699.620 8577.853 8456.085
SA Provided 8698.932 8915.948 9132.964 9349.980 9566.996 9784.012
Normal pool depth = 4.70 ft
Surface are req'd - 0.203 acres
Normal pool elevation - 267.7 feet
Surface area provided = 0.210 acres
9133 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schueler (1987)
Rv = 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.531 acre-ft
23113 cu. ft.
Water quality pool elevation= 270.15 feet
Storage volume provided - 0.632 acre-ft
27530 cu.ft.
Amberly -Phase 1 (EAST)
Stormwater Management
WR Project #204020
July 2004
Amberly West 1
Project Name: Amberly Project #: 204020
Ci / to : Cary, NC Date: 3-Feb-05
Table 1.7 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 WEST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 19.77 40 7.9
0 0.0
Totals 19.77 7.9
Total % Impervious Surface Area = 40.0 %
Normal Pool 249 250 251 252 253 254 255
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 14898.435 12314.891 10764.765 9042.403 7750.631 7061.686 6631.095
SA Provided 20527.000 22401.000 24331.000 26318.000 26382.000 30462.000 32619.000
Normal pool depth - 3.0 feet
Surface area required - 0.342 acres
Normal pool elevation a 249.0 feet
Surface area provided - 0.471 acres
20527 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009() where, Rv - Runoff coefficient, inJin.
I a Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.675 acre-ft
29424 cu. ft.
Water quality pool elevation- 251.20 feet
Storage volume provided a 1.150 acre-ft
50094 cu. ft.
Amberly- Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004

Amberly West 2
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiency in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER 13MP 2 WEST - WET POND (25% TN Removal) - Existing Pond

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.68 40 5.5
0 0.0
Totals 13.68 5.5
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.237 acres ** 3' Depth Assumed
Normal pool elevation - 291.0 feet
Surface area provided a 1.400 acres
60984 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009() where, Rv @ Runoff coefficient, inJin.
I m Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.467 acre-ft
20360 cu. ft.
Water quality pool elevation- 291.50 feet
Storage volume provided m 0.719 acre-ft
31320 cu. ft.
Amberly - Phase 2 QNES11
Stormwater Management
WR Project #204020
July 2004
Amberly West 3
Project Name: Amberly Project #: 204020
Ci /State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiency in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 3 WEST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.04 40 5.2
0 0.0
Totals 13.04 5.2
Total % Impervious Surface Area = 40.0 %
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv a Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.446 acre-ft
19407 cu. ft.
Area is piped to offsite BMP constructed by others.
Amberly - Phase 2 (WEST) WR Project #204020
Stormwater Management July 2004

Amberly West 4 - North
Project Name: Amberly Project #: 204020
i St te: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCUtNWUWQ 5tormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 4 WEST - DRY POND - NORTH OUTFALL(10% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 4.25 40 1.7
0 0.0
Totals 4.25 1.7
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.074 acres
Normal pool elevation - 280.0 feet
Surface area provided - 0.102 acres
4443 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.145 acre-ft
6325 cu. ft.
Water quality pool elevation= 281.30 feet
Storage volume provided a 0.149 acre-ft
6490 cu. ft.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
Project Name: Amberly
i / at : Cary, NC
STORMWATER BMP EAST #1 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)"(1/2)
Variables
WQ Volume: 0.386 Acre-ft
Head: 2.5 ft
Draw down time: 48 hrs
Orifice Area = 0.018075 sq. ft
Orifice Diameter = 1.820445 in
16814.16 cf
1.25 ft
172800s
2.602824 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
9= 32.2 ft/s2
Cd= 0.6
USE 2" DIAMETER ORIFICE

Project Name: Amberly
Ci at : Cary, NC
STORMWATER BMP EAST #2 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume: 0.632 Acre-ft 27529.92 cf
Head: 2.45 ft 1.225 ft
Draw down time: 48 hrs 172800 s
Orifice Area = 0.029895 sq. ft
Orifice Diameter = 2.341186 in
USE 2" DIAMETER ORIFICE
4.304884 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
9 = 32.2 ft/s2
Cd= 0.6

Project Name: Amberly
City/State: Cary, NC
STORMWATER BMP WEST #1 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)"(1/2)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
USE 2" DIAMETER 0
1.15 Acre-ft 50094 cf
2.2 ft 1.1 ft
96 hrs 345600s
0.028703 sq. ft 4.133176 sq. in
2.29402 in
RIFICE
roiect #: 204020
Date: 3-Feb-05
Constants
9 = 32.2 ft/s2
Cd= 0.6
Project Name: Amberly
i tate: Cary, NC
STORMWATER BMP WEST #2 - WET POND (25% TN Removal)
Retrofit Existing Pond
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume: 0.719 Acre-ft
Head: 0.5 ft
Draw down time: 72 hrs
Orifice Area = 0.05019 sq. ft
Orifice Diameter = 3.033509 in
31319.64 cf
0.25 ft
259200s
7.227366 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
g = 32.2 ft/s2
Cd= 0.6
USE 3" DIAMETER ORIFICE

Project Name: Amberly
Ci State: Cary, NC
STORMWATER BMP WEST #4 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume:
Head:
Draw down time:
0.149 Acre-ft
1.3 ft
72 hrs
6490.44 cf
0.65 ft
259200s
Orifice Area =
Orifice Diameter =
0.00645 sq. ft
1.087503 in
USE 1" DIAMETER ORIFICE
0.928861 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
g = 32.2 ft/s2
Cd= 0.6
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT I OMB APPROVAL NO. 0710-003
(33 CFR 325) Expires October 1996
Public reporting burden for this collection of information is estimated to average 5 hours per response, including the time for reviewing instructions,
searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send
comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to
Department of Defense, Washington Headquarters Service Directories of Information Operations and Reports, 1215 Jefferson Davis Highway, Suite
1204, Arlington, VA 22202-4302= and to the Office of Management and Budget, Paperwork Reduction Project (0710-0003), Washington, DC 20503.
Please DO NOT RETURN your form to either of those addresses. Completed applications must be submitted to the District Engineer having jurisdiction
over the location of the proposed activity.
PRIVACY ACT STATEMENT
Authority: 33 USC 401, Section 10; 1413, Section 404. Principal Purpose: These laws required permits authorizing activities in, or affecting, navigable
waters of the United States, the discharge of dredged or fill material into waters of the United States, and the transportation of dredged material for the
purpose of dumping it into ocean waters. Routine Uses: Information provided on this from will be used in evaluating the application for a permit.
Disclosure: Disclosure of requested information is voluntary. If information is not provided, however, the permit application cannot be processed nor
can a permit be issues.
One set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
application (see sample drawings and instructions) and be submitted to the District Engineer having jurisdiction over the location of the proposed
activity. An application that is not completed in full will be returned.
(/TEMS 1 THRU 4 TO BE FILLED BY THE CORPS)
1. APPLICATION NO. 2. FIELD OFFICE CODE 3. DATE RECEIVED 4. DATE APPLICATION COMPLETED
(ITEMS BELOW TO BE FILLED BY APPLICANT)
5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE (an agent is not required)
KB Home Raleigh-Durham, LLC Sean Clark, Soil & Environmental Consultants, P.A.
Attn: Pete Sullivan Project Manager / Environmental Scientist
6. APPLICANT'S ADDRESS 9. AGENT'S ADDRESS
1100 Navahoe Drive 11010 Raven Ridge Road
Raleigh, NC 27609
Raleigh N.C. 27614
7. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
a. Residence NA a. Residence 919-270-2738 (cell)
b. Business 919-871-0092 b. Business 919-846-5900
11. STATEMENT OF AUTHORIZATION
I hereby, authorize, to act in my behalf as my agent in the processing of this application and to
furnish, upon request, supplemental information in support of this permit application.
APPLI ANT'S SIGNATURE y- 0? -Devzl k? CyzlPty;t DATE
NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY I
12. PROJECT NAME OR TITLE (see inwctionsi
Amberly P.U.D. Parcels MF-2 and MF-2a
13. NAME OF WATERBODY, IF KNOWN (Wapplicable) UT to Panther Creek 114. PROJECT STREET ADDRESS (i1 applicable)
15. LOCATION OF THE PROJECT Not Applicable
COUNTY Wake STATE NC
16. OTHER LOCATION DESCRIPTIONS, IF KNOWN, rseeinstructions)
17. DIRECTIONS TO THE SITE
The project site is located immediately north of Yates Store Road (SR 1734) and immediately east of Panther Creek in what is now the Town of Cary.
ENG. FORM 4345, Feb 94 EDITION OF SEPT 91 IS OBSOLETE (Proponent: CECW-OR)
18. Nature of Activity /Description of project, include all features)
The proposed project is a residential subdivision with single and multi family portions. Typical utilities (i.e. roads, sewer, electric, etc.) will be installed to
the subject property. As stated above the area pertaining to this application is a smaller portion of the Amberly Subdivision, which the USACE has
considered to be one project. Proposed impacts are as follows: a) 292 linear feet of intermittent/unimportant stream channel resulting from the construction
of a road and lot fill, b) 50 linear feet of intermittent/unimportant stream impact resulting from the installation of a Town of Cary greenway trail, c) 77
linear feet of intermittent/ unimportant stream channel resulting from lot fill, and d) 1.717 acres of open water impact resulting from the conversion of an
irrigation pond to a stormwater pond.
19. Project Purpose (Describe the reason or purpose of the project, see instructions)
The purpose of the project is to provide additional housing for the area.
USE BLOCKS 20-22 IF DREDGED AND/OR FILL MATERIAL IS TO BE DISCHARGED
20. Reason(s) for Discharge
The proposed impacts are required to construct roads, greenways, lots and stormwater as shown on the attached impact maps.
21. Type(s) of material Being Discharged and the Amount of Each Type in Cubic Yards
Construction grade fill will be used on the site. Fill available from onsite grading will be utilized as much as possible. Cubic yardage of fill required for
the proposed impacts are as follows: Impact Area A = 530 yd3, Impact Area B = 15 yd3, and Impact Area C = 114 yd3. The conversion of the existing
1.717-acre irrigation pond to the stormwater pond will not require fill within the currently jurisdictional area.
22. Surface Area in Acres of Wetlands or Other Waters Filled /see instructions)
Impacts resulting from fill within MF-2 and MF-2A total 0.0432 acre. This total includes stream areas as well as wetland areas. Although the pond is not
being filled, by the USACE and US EPA's current definitions, the pond's surface area of 1.717 acres will be impacted.
23. Is Any Portion of the Work Already Complete? Yes No X IF YES, DESCRIBE THE COMPLETED WORK
The site has been partially graded primarily due to adjacent road construction of the Yates Store Road Extention. No impacts to wetlands within MF-2 or
MF2A have occurred. The areas that have been partially graded are within what was a pasture (i.e. not forested).
24. Addresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (If more than can be entered here,
please attach a supplemental list).
Please see attachement.
25. List of Other Certifications or Approvals/Denials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL* IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATE DENIED
* Would include but is not restricted to zoning, building and flood plain permits.
26. Application is hereby made for a permit or permits to authorize the work described in this application. I certify that the information in this
application is complete and accurate. I further certify that I possess the authority to undertake the work described herein or am acting as the duly
auth ized agen ofe applicant.
IG)NATUPE OF A}PPLIC T DATE SIGNATURE OF AGENT DATE
Pccd Lim elt X kB doi c Rc, / ei PjArhAku i-Lc-
The application must be si ned by the person who des?res o undertake the proposed activity (applicant) or it may be signed by a duly authorized
agent if the statement in block 11 has been filled out and signed.
18 U.S.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States knowingly
and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or fraudulent statements or
representations or makes or uses any false writing or document knowing same to contain any false, fictitious or fraudulent statements or entry,
shall be fined not more than $10,000 or imprisoned not more than five years or both.
TABLE OF CONTENTS
PURPOSE AND NEED STATEMENT ............................................................................................ 2
WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS ............................................... 2
PUBLIC INTEREST ISSUES ............................................................................................................ 2
3.1 CONSERVATION: ........................................................................................................................... 3
3.2 WATER QUALITY: ........................................................................................................................ 3
3.3 WETLANDS: .................................................................................................................................. 3
3.4 FLOOD HAZARD: .......................................................................................................................... 4
3.5 FLOODPLAIN VALUE: ................................................................................................................... 4
3.6 LAND USE: ................................................................................................................................... 4
3.7 RECREATION: ............................................................................................................................... 4
3.8 SAFETY: ....................................................................................................................................... 4
3.9 AESTHETICS: ................................................................................................................................ 5
3.10 HISTORIC PROPERTIES: ................................................................................................................. 5
3.11 WATER SUPPLY: ........................................................................................................................... 5
3.12 NAVIGATION: ............................................................................................................................... 6
3.13 ENERGY NEEDS: ........................................................................................................................... 6
3.14 MINERAL NEEDS: ......................................................................................................................... 6
3.15 ECONOMICS: ................................................................................................................................. 6
3.16 FISH & WILDLIFE VALUES: .......................................................................................................... 6
3.17 SHORE EROSION & ACCRETION: .................................................................................................. 7
3.18 FOOD & FIBER PRODUCTION: ....................................................................................................... 7
3.19 ENVIRONMENTAL CONCERNS: ...................................................................................................... 7
3.20 PROPERTY OWNERSHIP: ..................................................................................................... I ......... 8
3.21 NEEDS AND WELFARE OF THE PEOPLE: ........................................................................................ 8
4. MITIGATION .........................................................................................................................
Attachment 1 USGS Quad Site Vicinity Map
Attachment 2 Wake County Soil Survey Site Vicinity Map
Attachment 3 Proposed Site Plan / Impact Maps (4 sheets)
Attachment 4 Parcel Map Depicting Current Landowners and Adjacent Land Owners
Attachment 5 Stormwater Management Plan
1. PURPOSE AND NEED STATEMENT
The purpose of the proposed project is to construct a residential subdivision that includes
both single-family and multi-family components to meet the demand for housing in the
area. The property is included in the Town of Cary and is within an area that is situated
close to Raleigh and the Research Triangle Park. This area has experienced a great deal
of growth in the past 5 to 8 years and the demand for adequate housing has increased.
The subject property (the Project) is considered a portion of the Amberly project and is
designated as MF-2 and MF-2a. The remaining portion of the Amberly Project will be
permitted by others and will be developed by others as well so their final impact totals are
not currently known.
2. WETLANDS AVOIDANCE AND ALTERNATIVES ANALYSIS
The project site contains approximately 0.4233 acre of wetlands, a 1.717- acre pond, and
four intermittent/unimportant stream channels. The Project will not impact any wetland
areas but does propose fill in 419 linear feet of intermittent/unimportant stream and
converts the existing irrigation pond to a stormwater pond.
Wetland areas were avoided completely. A potential road crossing downstream of
Impact Area D (the pond) would have further connected the northern portion of the
property to the southern portion, however this was abandoned and the potential wetland
and stream impacts avoided. In a similar effort to avoid and minimize wetland impacts,
the greenway trail that is required by the Town of Cary along the western property line
was routed in such a way so as to avoid two large wetland areas adjacent to the stream
channel (see Sheet 2 of Impact Maps). The eastern portion of the project that is east of
the rerouted Yates Store Road avoids stream and wetland impacts completely.
3. PUBLIC INTEREST ISSUES
In a document provided by the U.S. Corps of Engineers titled "Wetlands & Corps
Wetland Regulations" and dated August 13, 2001, the Corps of Engineers lists 21
specific factors that will be reviewed related to Public Interest. These items are as
follows:
Conservation
Water Quality
Wetlands
Flood Hazard
Floodplain Value
Land Use
Recreation
Safety
Aesthetics
Historic Properties
Water Supply
Navigation
Energy Needs
Mineral Needs
Economics
Fish & Wildlife Values
Shore Erosion and Accretion
Food & Fiber Production
Environmental Concerns
Property Ownership
Needs and Welfare of the People
Responses to each of the 21 Public Interest Issues are presented below.
2
3.1 Conservation:
The client requested a detailed wetland delineation prior to site plan development in order
to avoid and minimize impacts to jurisdictional areas as much as possible. The site plan
has avoided all wetland areas as well as the majority of the streams on site. Riparian
buffers have been placed along streams below the two ponds that occur on the project's
property which will provide some wildlife cover and act as small-scale wildlife corridors.
3.2 Water Quality:
The Site is located in the Cape Fear River Basin in DWQ subbasin 03-06-05 and in
USGS Hydrologic Unit Code 03030002. Stormwater devices have been placed
throughout the property to comply with the Town of Cary's nitrogen reduction
requirements as well as DWQ's 85% TSS requirements. Please see Attachment 5 for
more information pertaining to the stormwater devices. Impact Area D will convert an
existing irrigation pond to a stormwater pond in an effort to protect downstream water
quality.
The western portion of the property drains directly to Panther Creek. The eastern portion
of the property drains to Morris Branch and the large lake that dams up Morris Branch.
Morris Branch then drains into Panther Creek. Panther Creek and Morris Branch are
classified as WS-IV, NSW waters by NCDENR.
3.3 Wetlands:
S&EC personnel conducted a detailed wetland delineation of the Site. Ms. Amanda
Jones of the US Army Corps of Engineers reviewed the site and approved the delineation
in 2002 (Action ID #200220442). As mentioned above a total of 0.4233 acre of wetlands
are located within the Project's boundaries and are being completely avoided. Based on
the proposed site plan, only streams and a surface water (Impact Area D) of 1.717 acres
in size will be permanently impacted by the development. The proposed impacts will
result from the installation of roads and lot fill (Impact Areas A and C), the installation of
a Town of Cary greenway trail (Impact Area B), and the conversion of an existing
irrigation pond to a stormwater pond (Impact Area D). The remaining streams and
wetlands as well as an isolated (i.e. Nonjurisdictional) pond will be avoided.
3.4 Flood Hazard:
The Project is located completely outside of any 100-year Floodplain.
3.5 Floodplain Value:
The streams within the project area that contain floodplains are buffered. The small
intermittent streams with impacts depicted on sheets 1 and 3 on the attached impact maps
are at the extreme top of the drainage basins and do not have floodplains associated with
them. The impact depicted on sheet 2 of the impact maps does occur within that stream
feature's floodplain (not a CAMA mapped floodplain) and the pipes have been sized
accordingly.
3.6 Land Use:
Land use in the surrounding area consists of primarily single-family residential
subdivisions. A partially forested tract exists immediately north of the subject area of the
property and was determined to be part of the same project with regards to 401/404
permitting. This additional portion of Amberly is being developed by Sandler at
Amberly, LLC (GS Carolina), a separate entity from the applicant of this project. The
northern portion of Amberly will be a combination of single-family residential
subdivisions and a retirement community.
The project area has in the past been used primarily as pasture land and has therefore
been primarily in herbaceous cover. Only the drainages below the ponds have been
forested and they will remain so.
3.7 Recreation:
There are no designated scenic or recreational areas currently within the Project's area.
As mentioned above, the proposed Impact Area B will result from the installation of a
greenway trail that will run along the western property line. This greenway trail will tie
into other Town of Cary greenway trails and can be utilized by the Project's residents as
well as the general public.
3.8 Safety:
Entrances to the community will meet the standards of the North Carolina Department of
Transportation. For example all intersections onto Yates store Road will occur at 90°
angles. Construction practices will follow industry and OSHA standards for safety. The
site is within the Town of Cary's jurisdiction and will therefore be inspected regularly to
certify that construction practices etc. meet specified standards.
4
3.9 Aesthetics:
The Project has been designed to be as aesthetically pleasing as possible with regards to
landscaping, architecture, etc. Although the pond depicted as Impact Area D will be
utilized as a stormwater device it will also have a great deal of aesthetic value for the
property. Likewise a nonjurisdictional pond on the eastern portion of the property will
also remain in place as an aesthetic feature. The required riparian buffers that exist along
three of the stream features on the property will further enhance the development.
3.10 Historic Properties:
NC SHPO maintains records of locations of buildings, structures, and objects that are
listed by local governments as historic landmarks or that are listed or eligible for listing
on the National Register of Historic Places. On January 15, 2004, S&EC, PA conducted
a review of records at the NC State Historic Preservation Office (SHPO) and the North
Carolina Office of State Archaeology (OSA) for sites and structures of archaeological
and historical significance on the project site. Two sites were found that were classified
as eligible for listing in the National Register of Historic Preservation by the NC SHPO
are located in the vicinity of Amberly: the William Marcom Farm and the John D.
Horton Farm.
According to NC SHPO records, the William Marcom Farm "is eligible for listing in the
National Register under Criterion A as an intact example of the development of a
Chatham County farm complex, and under Criterion C for architecture". NC SHPO
records state that the John Horton Farm contained "numerous outbuildings which
retained their architectural integrity" when it was surveyed and that the property is
believed to be eligible "under Criterion A for social history and Criterion C for
architecture."
The Office of State Archaeology maintains information of sites of archaeological
importance in North Carolina. The Office of State Archeology has no record of sites of
archaeological importance on or adjacent to the project site. According to Office of
State Archaeology records, an archaeological survey has never been performed on the
Amberly project site.
3.11 Water Supply:
Water will be provided by the Town of Cary as will sewer service. Older homes in the
area primarily are served by individual wells. The newer residential developments in the
area, such as Cary Park to the south, are provided water by the Town of Cary also. The
Town of Cary's main source of drinking water is Jordan Lake, which this site drains to.
As stated above, Panther Creek and Morris Branch are classified as WS-IV, NSW waters
by NCDENR.
5
3.12 Navigation:
No navigable waters are found on this site.
3.13 Energy Needs:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect the energy status of the County.
3.14 Mineral Needs:
This public interest issue is not applicable to this application, as the Briar Chapel Project
will not affect the need for minerals in the area.
3.15 Economics:
The Fiscal Impact Analysis has been completed for this project. The project is expected
to generate significant tax revenue. More immediately the project will provide jobs for
the area such as construction and landscaping work.
3.16 Fish & Wildlife Values:
The site has historically been used as pastureland and with the exception of the drainages
on property has been primarily in herbaceous cover. Species that require large forested
tracts will not be impacted because the Project's area is not being converted from a large
forested tract. Wildlife that utilize disturbed areas will be impacted the most by this
project. Species such as Robins, Mockingbird, Black snake, Field mouse, etc. that
require small areas of habitat or that are common to both disturbed areas and areas
occupied by humans will likely be only temporarily displaced.
At the time of delineation the streams with direct impacts did not contain fish. Although
the two ponds onsite were not evaluated for the presence of fish, if any exist they were
most likely placed there by previous landowners and did not occur there naturally. The
pond identified in As Impact Area D will be drained so that the dam can be reconstructed.
At this point any fish within the pond will be killed. The other isolated pond on the
property will not be altered so any fish that may occur within the pond will not be
harmed. Amphibians will still be able to utilize both ponds and the wetland and stream
areas that remain on the property after construction. The stream and wetland areas o the
property without proposed impacts will be buffered and therefore will enjoy the same
level of habitat protection that currently exists.
6
On January 15, 2004, S&EC, PA reviewed current NC Natural Heritage Program (NHP)
database files for known populations or records of Federally-listed Threatened or
Endangered species in the vicinity of the Amberly project. The NHP has no record of
occurrence of any Federally-listed Threatened or Endangered species within the
boundaries of Amberly. The nearest known occurrence of any Federally-listed
Threatened or Endangered species is for the Bald Eagle (Haliaeetus leucocephalus). The
NHP has records of the occurrence of the Bald Eagle in four locations in the vicinity of
Everett B. Jordan Lake, greater than 2 miles west of the project. The Bald Eagle
typically requires large areas of open water such as Lake Jordan. Although the Pond on
Morns Branch is rather large, habitat is not likely to be sufficient to support the Bald
Eagle. The Project is not expected to have any direct adverse effect on federally listed
species. No other occurrences of Endangered animal species are located within 5 miles
of the project and no occurrences of Endangered plant species are located within 2 miles
of the project.
3.17 Shore Erosion & Accretion:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not affect shore erosion or accretion.
3.18 Food & Fiber Production:
This public interest issue is not applicable to this application as the Briar Chapel Project
will not be producing any food or fiber and has not been in agriculture in recent history.
3.19 Environmental Concerns:
Noise
This region of the county is currently being developed but has in the past been primarily
used for agriculture or timber production. In the past, the majority of the noise producing
activities in the area are directly related to localized farming and logging operations;
therefore the noise generated on site is primarily the result of the operation of heavy
tillage equipment and motor vehicles. Recently due to the development of residential
neighborhoods, noise-generating activities have been due to grading and construction of
roads and housing.
Noise levels on the Project are expected to increase during the construction phase of the
project. Increased noise levels will be as a result of commonly used mechanical
equipment that will be utilized to grade the Site, road construction and building
construction. Construction is normally limited to daylight hours when loud noises are
more tolerable. Every reasonable effort will be made to minimize construction noise.
7
Immediately following completion of the project, noise levels will be similar to other
residential areas and will result primarily from cars etc. The preserved riparian buffers on
the property will help reduce this noise to surrounding areas.
Erosion and Sedimentation
The attached Water Quality Report prepared by Withers & Ravenel provides the
locations, calculations and surface areas for the proposed stormwater BMP devices. All
stormwater runoff on the Project will be directed to one of these devices, which will
greatly reduce if not eliminate erosion and sedimentation issues resulting from the
Project. During construction of the Project, temporary basins will also be used to further
isolate any potential problems. As previously mentioned, the eastern portion of the
property ultimately drains to the large pond that is on Morris Branch. Although the
stormwater will be retained prior to reaching Morris Branch, the large pond that was
constructed on Morris Branch will further reduce the likelihood of sediment entering the
stream system off property. The stormwater BMPs will be required to meet the DWQ's
requirements of removal of 85 percent of the total suspended solids (TSS). During
construction, erosion and sedimentation may occur during rain events.
3.20 Property Ownership:
Please see attached parcel data on Attachment 4.
3.21 Needs and Welfare of the People:
The proposed project includes designated sites for community infrastructure such as
public roads and a section of the Town's greenway system. The Project will be within
the Town of Cary's jurisdiction and therefore will be provided services by the Town's
Fire Department, Police Department, etc. Children living within this proposed
development will attend Wake County Schools.
The proposed Stormwater management plan for the Project will ensure that runoff from
the site does not negatively affect the surrounding communities or the drinking water that
is taken from the Lake downstream of the Project.
6. MITIGATION
No wetland impacts are proposed therefore no wetland mitigation is proposed. Although
the jurisdictional irrigation pond will be converted to a stormwater pond and thus be
removed from jurisdiction, the pond itself will remain in place and therefore no
mitigation is proposed for this impact. No impacts are proposed to stream channels that
are considered perennial or that demonstrate important aquatic function, therefore no
stream mitigation is proposed. If stream mitigation is required, a payment to the NCEEP
is proposed.

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108
Amberly
Project Mgr.:
(Parcels MF-2 & MF-2A)
Sc Chatham & Wake Counties
NC
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11010 Raven Ridge Rd- Raleigh, NC 27614
[phone] - [phone]
Web Page: www.SandEC.corn
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roject No. Figure 2 - Soil Survey Map
1089
Amberl Soil & Environmental Consultants, PA
SC Project Mgr.: (Parcels MF-2 & MF-2A) 11010 Raven Ridge Rd.- Raleigh, NC 27614
Chatham & Wake Counties, NC [phone] - [phone]
Web Page: www.SandEC.com
Scale: i'
1" = 1,320'
04/11/05 Wake County Soil Survey
Sheets 36 S 45, Nov. 1970
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1.
OWNERI: SANDLER AT AMBERLY
LLC
ADDRI: 448 VIKING DR STE 220
ADDR2: VIRGINIA BEACH VA
23452-7331
2.
OWNERI: SANDLER AT AMBERLY
LLC
ADDR1: 448 VIKING DR STE 220
ADDR2: VIRGINIA BEACH VA
23452-7331
3.
OWNERI: FOWLER, LILLIE H
ADDR1: 2109 YATES STORE RD
ADDR2: CARY NC 27519-9568
4.
OWNERI: MILLS, WILLIAM ELTON &
BILLIE PERRY
ADDRI: 7711 CARPENTER FIRE
STATION RD
ADDR2: CARY NC 27519-8626
5.
OWNERI: PULTE HOME
CORPORATION
ADDRL: 801 CORPORATE
CENTER DR STE 118
ADDR2: RALEIGH NC 27607-5073
6.
OWNERI: PULTE HOME
CORPORATION
ADDRL• 801 CORPORATE
CENTER DR STE 118
ADDR2: RALEIGH NC 27607-5073
7.
OWNERI: KELLY, DOUGLAS OLIVE
& RAMONA
ADDRL: 1800 YATES STORE RD
ADDR2: CARY NC 27519-9561
g.
OWNERI: HOLT, CAREY D &
SANDRA H
ADDRI: 1732 YATES STORE RD
ADDR2: CARY NC 27519-9559
9.
OWNERI: HARVEY, THOMAS J &
NANCY 0
ADDR1: 1720 YATES STORE RD
ADDR2: CARY NC 27519-9559
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WITHERS {' RAVEN EL
WATER QUALITY REPORT
SUPPORTING DESIGN CALCULATIONS
AMBERLY P.U.D.
PORTIONS OF PARCELS MF-2 AND MF-2a
Cary, North Carolina
Prepared For:
KB-Home Raleigh-Durham, LLC
lloo Navahoe Drive
Raleigh, NC
Attn: Pete Sullivan
Prepared By:
WITHERS & RAVENEL, INC
in MacKenan Drive
Cary, North Carolina 27511
February 2005
W&R Project No. 204020
INTRODUCTION
The purpose of this study is to document required water quality stormwater calculations for portions
of parcels MF 2 and MF 2a of the proposed Amberly subdivision in Cary, NC. The goal is to provide
detention structures which are designed in accordance with requirements set forth by the Division of
Water Quality.
METHODOLOGY
The stormwater study was conducted using proposed contours as shown on the construction
drawings and do not reflect as-built contours. There are four (4) stormwater BMP's proposed at this
time for these portions of Amberly. Three wet ponds will be constructed and one existing pond will
be retrofitted with a proposed riser structure. Additional BMP's may be added to the site during
future phases, and design documentation will be provided at that time. The BMP's included in this
report cover Phases I, II and 111.
A portion of Phase III will be piped into a stormwater wetland to be constructed by others. The area
is included within this report for documentation only. West BMP 3 will be constructed offsite and
Withers and Ravenel will provide necessary watershed data as requested by the designing engineer.
The scope of work included the following analyses:
Hydrolosy
? Simulation of the 11 i-inch of runoff for each drainage area.
Hydraulic
? Determination of the drainage area characteristics for each basin
? Sizing a drawdown orifice for the 1' 1-inch of post development runoff in each proposed
stormwater BMP
The results of the hydrology calculations are included in the attached spreadsheets. The hydraulic
design requires the development of stage-storage functions for each pond. The stage storage
functions for each pond were determined using Haestead Methods PondPack modeling software.
CONCLUSIONS
Each proposed pond and associated outlet structure is sized in accordance with DWQ regulations
for stormwater Best Management Practices.
Amberly W&R Projed 204020
DWQ Report February 2005

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BMP EAST 2 BMP EAST 1
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- Existing Pond
Y
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. F0. Revision Date By Designer Sok
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. Drawn By Date '
cn.
nF 02-a1-2005
• Checked By kb No.
-1 20.020
iERS & RAVENEL
,VEERS I PLANNERS 1 SURVEYORS 1
111 MacKenan Drive Cary. North Carolina 27511 1
www..ahervavend.c- fac 919167.6008

•
Amberly East 1
Project Name: Amberly Project #: 204020
Ci Stat : Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
V-nvnf FffiriPnrv in the PiPrlmnnt
% Impervious
Cover Permanent Pool Dept
3.0 . 4.0 5.0 6.0 h (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 EAST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 5.45 40 2.2
0 0.0
Totals 5.45 2.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 285 286 287 288 289 290 291
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 4107.0546 3394.8486 2967.525 2492.721 2136.618 1946.696 1827.9954
SA Provided 5501 6418 7392 8421 9509 10653 11853
Normal pool depth - 3.00 ft
Surface are req'd - 0.094 acres
Normal pool elevation - 285.0 feet
Surface area provided - 0.126 acres
5501 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1 -inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.186 acre-ft
8111 cu. ft.
Water quality pool elevation - 287.50 feet
Storage volume provided - 0.386 acre-ft
16814 cu. ft.
Amberly - Phase 1 (EAST)
Stormwater Management
WR Project #204020
July 2004

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Arnberly East 2
Project Name: Amberly Project #: 204020
City/State: Cary, NC Da e: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiencv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 2 EAST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 15.53 40 6.2
0 0.0
Totals 15.53 6.2
Total % Impervious Surface Area = 40.0 %
Normal Pool 266 267 268 269 270 271 272
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 11703.222 9673.761 8456.085 7103.111 6088.381 5547.192 5208.948
SA Provided 6337.110 7613.852 9784.012 11406.186 13084.117 14819.112 16611.170
Normal Pool 267.5 267.6 267.7 267.8 267.9 268
SA/DA 1.34 1.32 1.30 1.29 1.27 1.25
SA Required 9064.923 8943.155 8821.388 8699.620 8577.853 8456.085
SA Provided 8698.932 8915.948 9132.964 9349.980 9566.996 9784.012
Normal pool depth - 4.70 ft
Surface are req'd - 0.203 acres
Normal pool elevation - 267.7 feet
Surface area provided - 0.210 acres
9133 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schueler (1987)
Rv - 0.05 + 0.0090 where, Rv - Runoff coefficient, inJin.
I - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1 -inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.531 acre-ft
23113 cu. ft.
Water quality pool elevation 270.15 feet
Storage volume provided - 0.632 acre-ft
27530 cu.ft.
Amberly - Phase 1 (EAST) WR Project #204020
Stormwater Management July 2004
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Amberly West 1
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Removal Efficiency in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ 5tormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 1 WEST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 19.77 40 7.9
0 0.0
Totals 19.77 7.9
Total % Impervious Surface Area = 40.0 %
Normal Pool 249 250 251 252 253 254 255
SA/DA 1.73 1.43 1.25 1.05 0.90 0.82 0.77
SA Required 14898.435 12314.891 10764.765 9042.403 7750.631 7061.686 6631.095
SA Provided 20527.000 22401.000 24331.000 26318.000 26382.000 30462.000 32619.000
Normal pool depth - 3.0 feet
Surface area required - 0.342 acres
Normal pool elevation m 249.0 feet
Surface area provided - 0.471 acres
20527 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
1 s Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.675 acre-ft
29424 cu. ft.
Water quality pool elevation - 251.20 feet
Storage volume provided - 1.150 acre-ft
50094 cu. ft.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
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Amberly West 2
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Rmmnval FffiriPncw in the Piedmnnt
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 2 WEST - WET POND (25%. TN Removal) - Existing Pond

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.68 40 5.5
0 0.0
Totals 13.68 5.5
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.237 acres ** 3' Depth Assumed
Normal pool elevation - 291.0 feet
Surface area provided m 1.400 acres
60984 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the 'Simple Method' as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
- Percent impervious
Rv s 0.41 Win.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.467 acre-ft
20360 cu. ft.
Water quality pool elevation- 291.50 feet
Storage volume provided s 0.719 acre-ft
31320 cu. ft.
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Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
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Amberly West 3
Proiect Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Dmmnv41 Fffiripnrv in tFIP PiPdmnnt
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 3 WEST - WET POND (25% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 13.04 40 5.2
0 0.0
Totals 13.04 5.2
Total % Impervious Surface Area = 40.0 %
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv a 0.05 + 0.009(1) where, Rv - Runoff coefficient, inJin.
1 - Percent impervious
Rv - 0.41 inJin.
Total runoff volume from 1-inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.446 acre-ft
19407 cu. ft.
Area is piped to offsite BMP constructed by others.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
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Amberly West 4 - North
Project Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
Table 1.1 Surface Area to Drainage Area Ratio for Permanent Pool Sizing for 85% Pollutant
Rrmnval Fffivienrv in the Piedmont
% Impervious
Cover Permanent Pool Dep
3.0 4.0 5.0 6.0 th (feet)
7.0 8.0 9.0
10 0.59 0.49 0.43 0.35 0.31 0.29 0.26
20 0.97 0.79 0.70 0.59 0.51 0.46 0.44
30 1.34 1.08 0.97 0.83 0.70 0.64 0.62
40 1.73 1.43 1.25 1.05 0.90 0.82 0.77
50 2.06 1.73 1.50 1.30 1.09 1.00 0.92
60 2.40 2.03 1.71 1.51 1.29 1.18 1.10
70 2.88 2.40 2.07 1.79 1.54 1.35 1.26
80 3.36 2.78 2.38 2.10 1.86 1.60 1.42
90 3.74 3.10 2.66 2.34 2.11 1.83 1.67
Source: NCDENR/DWQ Stormwater Best Management Practices, pg. 5, April 1999
STORMWATER BMP 4 WEST - DRY POND - NORTH OUTFALL(10% TN Removal)

Land Use Area
(ac) % IA Imp. Area
(ac)
Residential 4.25 40 1.7
0 0.0
Totals 4.25 1.7
Total % Impervious Surface Area = 40.0 %
Normal pool depth - 3.0 feet
Surface area required - 0.074 acres
Normal pool elevation - 280.0 feet
Surface area provided - 0.102 acres
4443 sq. ft.
1-Inch Runoff Volume Calculation
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv - 0.05 + 0.009(1) where, Rv - Runoff coefficient, in./in.
I a Percent impervious
Rv - 0.41 Win.
Total runoff volume from 1 -inch precipitation:
Runoff volume, S - (Design rainfall) (Rv) (Drainage Area)
S = 0.145 acre-ft
6325 cu. ft.
Water quality pool elevation- 281.30 feet
Storage volume provided @ 0.149 acre-ft
6490 cu. ft.
Amberly - Phase 2 (WEST)
Stormwater Management
WR Project #204020
July 2004
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Project Name: Amberly
i /Stat : Cary, NC
STORMWATER BMP EAST #1 - WET POND (25% TN Removal)
Project #• 204020
Date: 3-Feb-05
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
0.386 Acre-ft
2.5 ft
48 hrs
0.018075 sq. ft
1.820445 in
16814.16 cf
1.25 ft
172800s
2.602824 sq. in
USE 2" DIAMETER ORIFICE
Constants
g = 32.2 ft/s2
Cd= 0.6
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Project Name: Amberly
Ci State: Cary, NC
STORMWATER BMP EAST #2 -WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(1/2)
Variables
WQ Volume: 0.632 Acre-ft 27529.92 cf
Head: 2.45 ft 1.225 ft
Draw down time: 48 hrs 172800s
Orifice Area = 0.029895 sq. ft
Orifice Diameter= 2.341186 in
USE 2" DIAMETER ORIFICE
4.304884 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
g = 32.2 ftls2
Cd= 0.6
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Pr Ject Name: Amberly Project #: 204020
City/State: Cary, NC Date: 3-Feb-05
STORMWATER BMP WEST #1 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)"(1/2)
Variables Constants
WQ Volume: 1.15 Acre-ft 50094 cf g = 32.2 ft/s'
Head: 2.2 ft 1.1 ft Cd= 0.6
Draw down time: 96 hrs 345600s
Orifice Area = 0.028703 sq. It
Orifice Diameter = 2.29402 in
USE 2" DIAMETER ORIFICE
4.133176 sq. in
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Project Name: Amberly
City/State: Cary, NC
STORMWATER BMP WEST #2 - WET POND (25% TN Removal)
Retrofit Existing Pond
Project #: 204020
Date: 3-Feb-05
Orifice Calculator
Q Cd*A*(2gh)"(1/2)
Variables
WQ Volume:
Head:
Draw down time:
Orifice Area =
Orifice Diameter =
0.719 Acre-ft
0.5 ft
72 hrs
0.05019 sq. ft
3.033509 in
31319.64 cf
0.25 ft
259200s
7.227366 sq. in
USE 3" DIAMETER ORIFICE
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Constants
9 = 32.2 ft/s2
Cd= 0.6
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Project Name: Amberly
Ci Stat : Cary, NC
STORMWATER BMP WEST #4 - WET POND (25% TN Removal)
Orifice Calculator
Q =Cd*A*(2gh)^(112)
Variables
WQ Volume: 0.149 Acre-ft
Head: 1.3 ft
Draw down time: 72 hrs
Orifice Area = 0.00645 sq. ft
Orifice Diameter = 1.087503 in
USE 1" DIAMETER ORIFICE
6490.44 cf
0.65 It
259200s
0.928861 sq. in
Project #: 204020
Date: 3-Feb-05
Constants
9 = 32.2 ft/s2
Cd= 0.6
0
NORTH
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Date
.CF 02-03-1005
lob No.
Hce 204020
AMBERLY P.U.D
BMP DESIGN - EAST
3MP EAST 1
Existing Pond
WITHERS &' RAVENEL
ENGINEERS I PLANNERS I SURVEYORS 1
111 Ma Kenan Drive Cary, North Carol" 27511 1
te1: 9194693340 wnw.witheruavenel.com fax [phone]N
BMP WEST 3 -
DRAINAGE AREA
Ac.
4
NORTH
BMP WEST 4
13:

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Designer Scale
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RC( 02-03-1005
Checked EY job No.
AMBERLY P.U.D
BMP WEST 2
Existing Pond
BMP WEST 1
BMP DESIGN -WEST
WITHERS &' RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
I 11 MacKenan Drive Cary, North Carolina 21511 L
let: 919469-3340 www.witheruvenelcwn 6a:91946760M
SOIL & ENVIRONMENTAL CONSULTANTS, PA
NC Division of Water Quality
Tran # Invoice Type Date Reference
7191 061305 Invoice 06/13/05 1089.W3
05-1) 0019
017635
Check Number: 17635
Date: 06/13/05 Check Amt: $475.00
Balance Discount Pay Amount
$475.00 $0.00 $475.00
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