20050982 Ver 1_Complete File_20050712

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PROGRAM
RECEIPT
Barry James
Brier Creek Associates, LP
3700 Arco Corporate Drive, Suite 350
Charlotte, NC 28273
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MAY 3 (1
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May 9, 2006 1;:?:Sly?Dsjt? :Jt?
DWQ #: 05-0982
COE #: N/A
Project: Brier Creek Village Center, Street B County: Wake
The North Carolina Ecosystem Enhancement Program (NC EEP) has received a check in the amount of S 1,993.72, check
number 20048, as payment for the compensatory mitigation requirements of the 401 Water Quality Certification and/or US
Army Corps of Engineers 404 and/or Division of Coastal Management CAMA permit(s) issued for the above referenced
project. This receipt serves as notification that the compensatory mitigation requirements accepted by NC EEP for this
project have been satisfied. Please note that you must also comply with all other conditions of the certification/permit(s)
including any additional mitigation conditions not accepted by NC EEP and any other state, federal or local government
permits or authorization associated with this activity.
The NC EEP, by acceptance of this payment, acknowledges that the NC EEP is responsible and agrees to provide the
compensatory mitigation requirements as indicated in the table below. The mitigation will be performed in accordance with
the Memorandum of Understanding between the NC Department of Environment and Natural Resources and the US Army
Corps of Engineers dated November 4, 1993.
Wetlands (credits) Stream (credits)
River Basin Cataloging
Unit
Riparian
Non-
Coastal
Cold
Cool
Warm Buffer
(sq. ft.)
Riparian Marsh
Neuse 03020201 0 0 0 0 0 0 2,082
Please note that a payment made to the Ecosystem Enhancement Program is not reimbursable unless a request for
reimbursement is received within 12 months of the date of the receipt. Any such request must also be accompanied by letters
from the permitting agencies stating that the permit and/or authorization have been rescinded.
If you have any questions or need additional information, please contact Chris Mankoff at [phone].
incerely,
`.?
tlltam D. Gilmore, PE
Director
cc: Cyndi Karoly, Wetlands/401 Unit
Monte Matthews, USACE - Raleigh
Eric Kulz, DWQ Regional Office -Raleigh
File
2zut r!;1G?5... E ... Prot-", Ortr State
ern
NCDENR
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 919-715-0476 1 wvwN.nceep.net
' l r v .
o?o? wAT ?q?t,
C Y
CIO
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
July 13, 2005
Brier Creek Associates, L.P.
c/o AAC Real Estate Services
Attn: Paul Herndon, V.P.
3800 ARCO Corporate Drive, Suite 200
Charlotte, NC 28273
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ Project # 05-0982
County: Wake
Subject Property: Brier Creek Village Center, Street "B"
UT to Little Brier Creek [03-04-02, 27-33-4-1, NSW (nutrient sensitive)]
APPROVAL of Neuse River Buffer Rule (15A NCAC 02B.0233) Authorization Certificate
Dear Mr. Herndon:
You have our approval, in accordance with 15A NCAC 02B .0233 and any conditions listed below, to impact
approximately 1,388 ft2 of Zone 2 of the protected riparian buffers for the purpose of constructing the collector street
at the subject property as described within your application dated June 3, 2005. In addition, you should obtain or
otherwise comply with any other required federal, state or local permits before you go ahead with your project
including (but not limited to) Erosion and Sediment Control and Non-discharge regulations.
This approval is for the purpose and design that you described in your application. If you change your project, you
must notify us and you may be required to send us a new application. If the property is sold, the new owner must be
given a copy of this authorization and approval letter and is thereby responsible for complying with all conditions.
This approval requires you to follow the conditions listed below.
The Additional Conditions of the Certification are:
1. Impacts Approved
The following impacts are hereby approved as long as all of the other specific and general conditions of
this Certification (or Isolated Wetland Permit) are met. No other impacts are approved including incidental
impacts:
Amount Approved
Units Plan Location or Reference
Buffers 1,388 (square ft. Zone 2 only
2. Diffuse Flow
An additional condition is that all stormwater shall be directed as diffuse flow at nori-erosive velocities
through the protected stream buffers and will not re-concentrate before discharging into the stream as
identified within 15A NCAC 213 .0233(5).
3. Certificate of Completion
Upon completion of all work approved within this authorization, and any subsequent modifications, the
applicant is required to return the attached certificate of completion to the 401AVetlands Unit, North
Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650.
401 Wetlands Certification 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
No tiltCarolma
aturally
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
. .
Brier Creek Associates, L.P.
Page 2 of 2
7/13/05
4. Buffer Mitigation
You are required to mitigate for impacts to the protected riparian buffers. The required area of mitigation to
compensate for impacts to the protected riparian buffers is 2,082 square feet as required under this
Authorization Certificate and 15A NCAC 213 .0242(buffer mitigation rule). We understand that you wish to
make a payment into the Riparian Buffer Restoration Fund administered by the NC Ecosystem Enhancement
Program (EEP) to meet this mitigation requirement. This has been determined by the DWQ to be a suitable
method to meet the mitigation requirement. In accordance with 15A NCAC 2B .0242(7)(buffgr mitigation
rule), this contribution will satisfy our compensatory mitigation requirements under 15A NCAC 213
.023 3 (1 0)(buffer protection rule). Until the EEP receives and clears your check (made payable to: DENR -
Ecosystem Enhancement Program Office), no impacts specified in this Authorization Certificate shall occur.
The EEP should be contacted at [phone] if you have any questions concerning payment into the
Riparian Buffer Restoration Fund. You have one month from the date of this approval to make this payment.
For accounting purposes, this Authorization Certificate authorizes payment into the Riparian Buffer
Restoration Fund to compensate for 2,082 ft2 of required riparian buffer mitigation for impacts to 1,388
ft2 (Zone 2 impacts) of protected riparian buffers; 03-04-02 river and subbasin."
5. Protective Fencing
The outside buffer, wetland or water boundary and along the construction corridor within these boundaries
approved under this authorization shall be clearly marked with orange warning fencing (or similar high
visibility material) for the areas that have been approved to infringe within the buffer, wetland or water
prior to any land disturbing activities to ensure compliance'with 15A NCAC 213 .0233.
6. No Impacts to Zone 1
No impacts shall occur to Zone 1 of the protected riparian buffers (except for uses and activities designated as
"exempt" within 15A NCAC 02B .0233), unless otherwise approved by the DWQ.
Any disputes over determinations regarding this Authorization Certificate (associated with the approved buffer
impacts) shall be referred in writing to the Director for a decision. The Director's decision is subject to review as
provided in Articles 3 and 4 of G.S. 150B. This Authorization Certificate shall expire five (5) years from the date of
this letter.
This letter completes the review of the "No Practical Alternatives" determination under 15A NCAC 213 .0233. If
you have any questions or would like a copy of the buffer rules, please call [phone]. This letter does not
authorize any impacts to either Waters of the United States or Waters of the State. Please contact the US Army
Corps of Engineers (USACE) or NC Division of Water Quality (DWQ) if any impacts are proposed to either of
these waters.
AW K/dae
Enclosures: Certificate of Completion
EEP Notification
cc: Mike Horan, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Central Files
Sincerely,
tlAlan .Klimek, P.E.
Filename: 050982BrierCrkStreetB(Wake)NBR
?OF W AT FqQ Michael F. Easley, Governor
'C G William G. Ross Jr., Secretary
7 North Carolina Department of Environment and Natural Resources
? -I
O Alan W. Klimek, P.E. Director
Division of Water Quality
North Carolina Division of Water Quality
401 Water Quality Certification
Summary of Permitted Impacts and Mitigation Requirements
In accordance with 15A NCAC 2H.0500, Brier Creek Associates, L.P. has permission as outlined below to impact
1,388 square feet of riparian buffer for the purpose(s) of constructing the proposed collector street in Wake County.
All activities associated with these authorized impacts must be conducted with the conditions listed in the attached
Permit transmittal letter. THIS PERMIT IS NOT VALID WITHOUT THE ATTACHMENTS.
COMPENSATORY MITIGATION REQUIREMENTS, ECOSYSTEM ENHANCEMENT PROGRAM
LOCATION:
DWQ NO:
COUNTY
BASIN/ SUB BASIN
Brier Creek Village Center, Street "B"
05-0982
Wake
03-04-02
As required by 15A NCAC 2H.0500, and the conditions of this Permit, you are required to compensate for the above
impacts through the restoration, creation, enhancement or preservation of wetlands and surface waters as outlined
below prior to conducting any activities that impact or degrade the waters of the state.
Note: Acreage requirements proposed to be mitigated through the Ecosystem Enhancement Program must be
rounded to one-quarter acre increments and linear foot requirements must be rounded up to the nearest foot
according to 15 2R.0503(b).
Impacts:
1,388 Square feet of Riparian Buffer
Mitigation:
2,082 Square feet of Riparian Buffer
One of the options you have available to satisfy the compensatory mitigation requirement is through the payment of
a fee to the Wetlands Restoration Fund per NCAC 2R.0503. If you choose this option, please sign this form and
mail it along with a copy of your 401 Certification or Buffer Approval to the Ecosystem Enhancement Program at
the address below. An invoice for the appropriate amount of payment will be sent to you upon receipt of this form.
PLEASE NOTE, THE ABOVE IMPACTS ARE NOT AUTHORIZED UNTIL YOU RECEIVE NOTIFICATION
THAT YOUR PAYMENT HAS BEEN PROCESSED BY THE ECOSYTEM ENHANCMENT PROGRAM.
Signature Date
ECOSYSTEM ENHANCEMENT PROGRAM
152 Mail Service Center
RALEIGH, N.C. 27669-1652
[phone]
Filename: 050982BrierCrkStreetB(Wake)EEP
401 Wetlands Certification 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.uslncwetiands
one
N tthCarolina
Natara!(y
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Soil & Environmental Consultants, PA
' 11010 Raven Ridge Road - Raleigh, North Carolina 27614 - Phone: [phone] - Fax: [phone]
www.SandEC.com
June 3, 2005
S&EC Project # 3165.w8
' To: N.C. Division of Water Quality
401 Oversight and Express Permits Unit
Attn: Cyndi Karoly
' 2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
From: Bob Zarzecki
' Soil & Environmental Consultants, P.A.
11010 Raven Ridge Road
Raleigh, NC 27614
Re: Neuse River Buffer Request for Authorization Certificate
Brier Creek Village Center, Street "B", Wake, NC
On behalf of the owner, Brier Creek Associates, L.P., please find attached a complete application
and supplemental information requesting an Authorization Certificate from the N.C. Division of
Water Quality (DWQ) for impacts to the Neuse River Buffers. Please contact me at (919) 846-
5900 if you have any questions or require additional information.
DDn IG(`T CI IKAKAGRY
Project Name Brier Creek Village Center, Street "B"
Project Type Road
Owner / Applicant Brier Creek Associates, L.P.
Count Wake
Nearest Town Raleigh
Waterbod Name UT to Little Brier Creek
Basin / Sub-basin 03-04-02
Index Number 27-33-4-1
Class C NSW
IMPACT SUMMARY
Zone* Impact
square feet Multiplier Required
Mitigation
1 0 3 (2 for Catawba) 0
2 1,388 1.5 2,082
Total 1,388 2,082
Attachments:
Pre-construction Notification (PC N) Application Form
Agent Authorization `v? i l V
Wake County GIS Site Vicinity Map,
Southeast Durham, NC - USGS Map & Wake County Soil Survey Map - Sheet No. 9-i ?-
DWQ Buffer Letter & Map 0 L(?Q?J
Wetland Delineation
Impact Exhibits
Level Spreaders Worksheets, O&M Agreement and Construction Details 1???F•?Ztt?.`.
Brier Creek Village Center - Master Plan O??,wo5\?yrit:'
?t
Charlotte Office:
236 LePhillip Court, Suite C
Concord, NC 28025
Phone: [phone]
Fax: [phone]
Greensboro Office:
3817-E Lawndale Drive
Greensboro, NC 27455
Phone: [phone]
Fax: [phone]
Office Use Only' Fonn Vcrsion March 05
USACE Action ID No. DWQ No.
(If any particular item is not applicable to this project, please enter "toot Appticaote" or "iwA".)
1. Processing
1. Check all of the approval(s) requested for this project:
? Section 404 Permit ® Riparian or Watershed Buffer Rules
? Section 10 Permit ? Isolated Wetland Permit from DWQ
? 401 Water Quality Certification ? Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: N/tl
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ?
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here:
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?
IL Applicant Information
1. Owner/Applicant Information
Name: Brier Creek Associates, L.P.
Mailing Address: c% Aft C Real Estate Services '
Attn: Paul Herndon, VP. JUN 3 2005
3800 ARCO Corporate Drive, Suite 200
Charlotte, NC 28273 iETL NDSh+B
Telephone Number: [phone] Fax Number:
E-mail Address:
' 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Bob Zarzecki
' Company Affiliation: Soil & Environmental Consultants, PA
Mailing Address: 11010 Raven Ridge Road
Raleigh, NC 27614
Telephone Number: [phone] Fax Number: [phone]
E-mail Address: bzarzecki@sandeacout
' Page I of 12
III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
' and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
' boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be infonned that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: BRIER CREEK VILLf1GE CENTER, STREET "B"
2. T.I.P. Project Number or State Project Number (NCDOT Only): NIA
' 3. Property Identification Number (Tax PIN): 0758921096
4. Location
County: Wake Nearest Town: Raleigh
Subdivision name (include phase/lot number): Brier Creek
Directions to site (include road numbers/names, landmarks, etc.): The site is located south
' of Brier Creek Parkway, East of Globe Road & North of 1-540. From Raleigh; take
Glernvood Ave.11I)vy 70 )vest towards Durham; pass over 1-540; turn left onto Brier Creek
Parkway; travel approximately 1.2 wiles; the site will be on your left.
5. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
' separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 35.8982 ON 78.8001 °W
' 6. Property size (acres): -186 acres - Tracts A, B, C, D & E see attached plaster Plan
7. Name of nearest receiving body of water: Little Brier Creek (27-33-4-1; CNS{V)
8. River Basin: Neese (03-04-02)
(Note - this must be one of North Carolina's seventeen designated major river basins. The
' River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
' at the time of this application: The existing condition of the site consists of vacant
woodland. The surrounding laud uses include the Brier Creek residential subdivision to
Page 2 of 12
the north, the Globe Center commercial area to the south, other surrounding commercial
areas, and 1-540 to the south.
10. Describe the overall project in detail, including the type of equipment to be used: The
project includes the construction of Street "B": Street "B" is intended to be a collector
street with a cross-section inchiding a right-of-way up to one hundred (100) feet in width
with tivo (2) travel lanes and a median reserved for future transit use. Typical road
construction materials, techniques and equipment will be used.
11. Explain the purpose of the proposed work: Street "B" is identified on the Master Plan for
the Brier Creek Village Center Planned Development District (see attached,lfaster Plan
' map). Street "B" is identified as intersecting Village i1fain Street (Street "A ") at the
Village Center Core (located at the `proposed activity node at the intersection of Street `ti"
and Street "B') and connecting Globe Road to Brier Creek Parkway. Brier Creek Village
' Center will be a pedestrian-oriented, multiple-use development with complementary
residential, recreation, institution/civic/services, office, and commercial land uses.
IV. Prior Project History
If jurisdictional detenninations and/or permits have been requested and/or obtained for this
' project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
' certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
' list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.
' Buffers - The applicability of the Neuse River Buffers to surface waters located within the
area of the Brier Creek Village Center were determined by Mr. Danny Smith of the N. C.
Division of Water Quality (DJVQ) in November and December of 1997 as described in the
' attached letter and map from Mr. Smith dated .hate 12, 1998.
Wedand Delineation Map - The wetland delineation ntap for Brier Creek Village Center ivas
' approved by A1s. Andrea Wade of the U.S. Army Corps of Engineers on May S, 2004, Action
ID No. 200420801 (see attached). This attached map depicts the extents of all waters of the
U.S. subject to Section 404 jurisdiction of the Clean Water Act within the Brier Creek Village
' Center, excluding Little Brier Creek proper.
S&EC is not aware of any USA CE 404 Permits, D IVQ Water Quality Certifications or D IVQ
' Neuse River Buffer Authorization Certificates or other buffer approvals previously being
issued for the Brier Creek Village Center property.
Page 3 of 12
1 V. Future Project Plans
' Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
t No impacts to surface waters or buffers within Brier Creek Village Center are anticipated to
occur at this time.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
' wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
' permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
Provide a written description of the proposed impacts:
No impacts to lVaters of the U.S. or Waters of the State are proposed.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
sennrntely list impacts clue to hoth structure and floodinu.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
(yes/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)

Total Wetland Impact (acres) 0
3. List the total acreage (estimated) of all existing wetlands on the property: 0.22 acres (other
waters located on the property include 0.04 acres of streams and a 2.33-acre pond) - no
impacts are proposed to any of these waters
Page 4 of 12
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Number
(indicate on ma)
Stream Name
Type of Impact Perennial or
Intermittent'? Average
Stream Width
Before Impact Impact
Length
(linear feet) Area of
Impact
(acres)

Total Stream Impact (by length and acreage) 0 0
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact
Site Number
(indicate on map) Name Waterbody
applicable) e)
(if ap
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,
ocean, etc.) Area of
Impact
(acres)

Total Open Water Impact (acres) 0
I 6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0
Wetland Impact (acres): 0
Open Water Impact (acres): 0
Total Impact to Waters of the U.S. (acres) 0
Total Stream Impact (linear feet): 0
7. Isolated Waters
Do any isolated waters exist on the property? ? Yes ® No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE.
I No impacts to isolated wetlands are proposed.
Page 5 of 12
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
' Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
This project does not propose the construction of a pond.
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
infonnation related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
' were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
' Wetlands & Waters -All impacts to wetlands and waters located on the site have been avoided.
' Buffers - The location of Street "B" was set based on existing intersection locations on both
Globe Road and Brier Creek Parkway, as well as its connection to the Village Center Core as
described in the attached ,Waster Plan. All impervious road and sidewalk surfaces have been
' designed outside of the Neuse River Buffers. The use of head)valls and an engineered scour
hole velocity dissipater (instead of a standard dissipater) have been included within the design
to minimize impacts to the protected buffers and to avoid all impacts to Zone I of the protected
' buffers.
Twin 66" RCP culverts are required to pass existing overland stornnvater flows under the
' road. Please note that these culverts will only bypass existing storm flows that currently flow
through this drainage. All stormwater runoff from the road will be diverted to devices that will
comply with the diffuse flow provision of the Neuse Buffer Rule.
' A DJVQ designed preformed scour !tole has been proposed for one of the two stormwater
discharge locations front the road and a level spreader/bypass option design has been
' proposed for the second stormwater discharge location from the road. These level spreader
designs were based on the D{VQ Level Spreader Design Options - Version 1.0, October 10,
2001. Please note that while the .}pass option is proposed, no bypass conveyance through the
' buffer will be used and as such additional impacts to the buffers have been avoided. The
b}pass water will be directed to a velocity dissipater to lower velocities and prevent erosion.

Page 6 of 12
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in detennining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
11ttp://l12o.enr.state.nc.us/ncwetIands/stnngide.litin1.
1. Provide a brief description of the proposed mitigation plan. The description should provide
as much infonnation as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
We understand that the proposed activity would be classified as a "Road impacts other
than crossings of streams and other surface waters subject to this Rule" use of the Neuse
Buffer Rule. This use is designated as an "Allowable with Aitigation" use. To satisfy this
mitigation requirement, the applicant proposes payment in to the Riparian Buffer
Restoration Fund administered by the X C Ecosystem Enhancement Program (EEP). We
understand that prior EEP acceptance is not required for proposals to pay into this fired.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
Page 7 of 12
website at littp:Hii2o.enr.state.nc.us/wrp/index.litm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following infortnation:
Amount of stream mitigation requested (linear feet): 0
Amount of buffer mitigation requested (square feet): 2,082 sf
Amount of Riparian wetland mitigation requested (acres): 0
Amount of Non-riparian wetland mitigation requested (acres): 0
Amount of Coastal wetland mitigation requested (acres): 0
IX. Environmental Documentation (required by DWQ)
' 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ? No
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ? No ?
' 3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ? No ?
' X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
' It is the applicant's (or agent's) responsibility to detennine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
' and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
' (Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ® No ?
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Zone* Impact Multiplier Required
(square feet) Mitigation
1 0 3 (2 for Catawba) 0
2 1,388 1.5 2,082
Total 1,388 2,082
' Page 8 of 12
' * Zone I extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone I.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration / Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 213 .0242 or.0244, or.0260.
' Payment into the Riparian Buffer Restoration Fund as described in Section VIII.
XI. Stormwater (required by DWQ)
' Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
stormwater controls proposed in order to protect surface waters and wetlands downstream from
' the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level.
' The total post-construction, built-out percentage of impervious area within Brier Creek
Village Center is anticipated to be greater than 30%. However in that no Water Quality
Certification is anticipated to be required for this development, we do not anticipate that a
' DJVQ approved storm ivater managementplan will be required
Plans and calculations have been provided to detail how the proposed project will comply with
' the diffuse flow provision of the Neuse Buffer Rule.
The development of the site will comply with all locally administered stormwater management
' programs.
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
' Sanitary Sewer System - The local municipalities and DIVA will ensure that the proposed
development does not exceed available capacity of the receiving facility.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ? No
' Is this an after-the-fact permit application? Yes ? No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ? No
Page 9 of 12
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetIands. If no, please provide a short narrative description:
YV. Other Circumstances (Optional):
' It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
' work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
Based on the fact that impacts to waters have been avoided, the proposed impacts to buffers
have been minimized to 1,388 sf (of which 314 will be revegetated), adequate buffer mitigation
is proposed, and an extensive aniount of supportive material has been provided, it is the
' applicant's /tope that your review will be performed as expeditiously as possible. Please
contact me if you require any additional information. Me appreciate your review of this
application.
? ? G .3 os
r pplican rlbcn. s Signature ate
' (Agent's signature is valid only if an authorization letter from the applicant is provided.)
Page 10 of 12
7 5 5 2200 i G ...,:.L E_1r.I :l t5 d50 ?.C0', OCl
PIL
Soil!
11010 )*,'zvrn Rid;c Road ltalc}?h, North Cr,roluta 27614 • 1 .1:: (919) $4G 5i00 Fm [phone]
', tivvr.SrnAEC.com
AGENT AMHORIZA`i'ION FORM,
All 111anks To Be FiIle?l fn By The Current Landormcr

; - ;: (,/p AACReal Estate Services, 3800 ARCO Corporate Dr., Ste.200
Charlotte, NC 28273

(704) 295-400j
Cfcription I3jta Qt_74 l,'arcel /5,FrEC-Project No. 97-3165
- `_twmt of the Army
_ Coro- of Engiulecr,, W?luungtozl D15trict
NC 28402
Anvmda Tony
' ?' :J :s K!21ated Consulting 'nd Pemutting
%I"6 % It May Comm;
owner, hereby desi&nate and authorize Soil & Environmt_mt O Cm5wtmts, hic. to
a,iy wcIuilf as my agent in the procc :sing of pcmilt applications, to furnish upon mquc5t
.1. o:eircnt=? WozuwLion in support of applications, etc. from tlvs day fonvard, The ' 5tli day of
' - - r, yap, rscdes any previous corrcspolidenc : Coztceming the agezlt for trlis I!rojccL
-- 1'tus, authorization, for liability and professional courtesy reason,-, is void only for
- - rrt officials to enter the property when accompanied by S€tEC staff. You Should cau S&EC
' - ^< < 6112 Pnecting istior to vicith g the site.
?o r 'actl Flerndort V.P. (_1
t-- - C? e;_< Asgtxj??tfls. I,.P. L-I ?_.? , --sc? ?---
Piopczty O1ti-,n&s NamY Property Owner's Signature
' : '•'.?. John Donicy c: tits. Jcm9cr A, Durdctte
zmQ Soil & Envirotu itn nbt Consultants, Inc-
... y._ -_ . _';.•' ?^,> Boulc?;?rd
Cl ?}:e ,rn(au hfoi?idu: ?r?.
-'" .'iC VOW
91DIj, w? :?oa
....rs.., t,rrn.1 3tS17-LLZ-wnd:.ls Wve
?I
' Approximate
Location of
Street "B"
Globe Rd.
II'
1
i
i N
Prot I: Scale:
3165.w8 NTS
Project Date:
Mgr.: BZ 06-01-05
Wake County GIS Map
Brier Creek Village Center
Street "B°
Wake County, NC
I
1

Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] • [phone]
Web Page: www.SandEC.com

A
roximate
pp
Location of
- -j, Street B

?? Globe Rd.
f
t
'

N
Project #: Scale: Southeast Durham, NC
3165.w8 NTS
hic Ma
USGS To
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P
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t p
p
g
p
rojec a
e:
Mgr.: BZ 06-01-05
Brier Creek Village Center
Street °B"
Wake County, NC

-_-
r

1 i r

r
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd.- Raleigh, NC 27614
[phone] - [phone]
Web Page: www.SandEC.com
N
Projects: Scale: Wake County Soil Survey
3165.w8 NTS Sheet 26
Project Date: Soil & Environmental Consultants, PA
Mgr.: BZ 06-01.05 11010 Raven Ridge Rd.- Raleigh, NC 27614
Brier Creek Village Center [phone] • [phone]
Street ?Bn Web Page: www.SandEC.com
Wake County, NC
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
RALEIGH REGIONAL OFFICE
June 12, 1998
D. HUNT JR.
' NOR
Bob Zarzecki
Soil & Environmental Consultants, inc.
244 West Millbrook Road
' Raleigh, North Carolina 27609
McOCVrrr'
VARY 'i.?^c: 1M
'•i`. Subject: Neuse River Basin Riparian Rules
NBR-RRO-20
Wake County
Dear
Mr. Zarzecki:
On several occasions during November and December of 1997 I met with personnel
from Soil and Environmental Consultants, Inc. at the proposed development/project
known as Briar Creek in Wake County. At your request , an evaluation was performed
to determine whether the site would require compliance with the Neuse River Buffer
L Requirements. There are streams and a pond on the property which is subject to the
Neuse Buffer Rule, The map you provided indicates the streams, and the pond that are
subject to the rule. (see attached map).
' If you have any questions please call me at (919) 5714700.
• , r:
i

S" CCrely,
Danny Sm' !
cc: RRO - file copy
wetlands group-John Domey
3000 9ARREVT OR7VE, sum 101, RALEIGH, NORTH CAROLINA 27609
PHONK S 10.571-4700 FAX [phone]
AN EQUAL OPPORTUNITY/ AFFIRMATIVE ACTION EMPLOYER - 50% RCCYCLCO/10% POST-CONSUMER PAPER
/
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LCVC.INU
AREA EXAMINED
= LIMITS OF NEUSE RIVER BASIN
SUBJECT TO NEUSE BASIN BUFFER
(CONFIRMED BY DWQ)
NOT SUBJECT TO NEUSE BASIN BUFFER
(CONFIRMED BY DWQ)
_r.-_.._..----_.-- SUBJECT TO NEUSE BASIN BUFFER
(NOT VISITED BY DWQ)
NOT SUBJECT TO NEUSE BASIN BUFFER
(NOT VISITED BY DWQ)

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G
-r7 GENERAL NOTES 0o
Mb
` 1.) THIS IS NOT A BOUNDARY SURVEY. +
N This certifies that this copy of this plat identifies as waters of the U.S.
or wetlands
all areas of
t

s7

2.) BOUNDARY INFORMATION SHOWN HEREON IS BASED ON ,
,
wa
ers of the U.S., including wetlands, regulated pursuant to Section 40q of
the Ocean Water Act as d
t
4

BOOK OF MAPS 2000 PACE 1185. e
ermined by the undersigned on this dote. Unless there
a change
in the law, or our published regulations
thi
termi
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7
3.) COORDINATES SHOWN HEREON ARE BASED ON ,
s
e
notion of Section 404 jurisdiction
may be reli d upon fora period not to exceed five years from this date
This det
wa
d
i

NC CRID (NAD 83) .
erm
s ma
nation
e ili7i g,he 1987 f?
orps f Engineers Wetlands Delineation Manual.
4.) WETLAND LINES AND BUFFER START/ STOP POINTS WIDE 602
+
(name) o

WERE DELINEATED IN THE FIELD BY SOIL k ENVIRONMENTAL E
WETUND
PIK
±71 SQ
FT "_
?
CONSULTANTS. P.A. .
.
(title) -P,
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KK77
78
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(date) ?
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@
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KK24 604 N I, Jeffrey T. Parker, a North Carolina Professional Land Surveyor
d
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7

WETLAND AREA
N
NRfl START ,
o
ereby certify that this map was prepared under my supervision
and shows the locations of Section 404 Jurisdictional Areas a

19434 SQ. FT.
N 781729.3 s
delineated by S&EC of Raleigh, NC.
E 2059350.6

\s
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29fA
11,57 - p
\ +N STREAM CHANNEL WITH ''- •`??rC? ..... ..
N NEUSE RIPARIAN BUFFER Jeffrey ark r, NCPLS L-3382 •. S 5 f ?\ ?t? E 70 y
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BRIER CREEK ASSOCIATES ACRES
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TRACT 3 LOT 21
Rfw MoN 130M 2000 PG 1185 7
P.I.N. 0758-91-1352 \
a do 0758-92-7623
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PK 212.
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OT-CAP 379.15' S 88'42'34• E S 89'37'55' E 853 39.63 '$03 854
DOT-C,OD9.28' OT-CAP 600.10' N aFZ4Y
STREAM CHANNEL WITH
NEUSE RIPARIAN BUFFER
4'-8' WIDE
11572 SO. FT.
N 88'10'53• E
590.12' (TOTAL
NORTHERN WAKE EXPRESSWAY I-540 NCDOT R/w CAP (TYP)
N 780759.15 GRAPHIC SCALE °
E 2060042.87
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IMPACT EXHIBITS
10

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IRAN 9T 2u NT NOTE:
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OCCUR , A S, A ll TRANSIT EASEWNT A U DF MtRTY-FIVE 6 (RS) FEET
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TOTAL NEUSE BASIN RIPARIAN
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LENGTH OF UAPACTED CHANNEL = 0 LF
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' LEVEL SPREADERS
140

DWQ Project No.
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Brier Creek Village Center
Contact Person: Brandon Plunkett [phone]
Phone Number:
' Level Spreader ID: FES56
Level Spreader Length N/A. (perpendicular to flow)
Drainage Area 2.86 ac. (on-site and off-site drainage to the level spreader)
Impervious Area 1.0 ac. (on-site and off-site drainage to the level spreader)
Maximum Filter Strip/Buffer Slope N/A (6% for forested, leaf littler cover, 8% for thick ground cover)*
' grass
Max. Discharge from a 10 Year Storm 6.68 cfs
Max. Discharge to Level Spreader 6.68 cfs
Filter Strip/Buffer Vegetation N/A (thick ground cover or grass, canopied forest with leaf litter
groundcover)
' Pre-treatment or Bypass Method Pre-Treatment
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach an explanation of why. At a minimum, a
complete stormwater management plan submittal includes a worksheet for each BMP, design calculations, plans and
specifications showing all BMPs and outlet structure details, a detailed drainage plan and a fully executed operation
and maintenance agreement. An incomplete submittal package will result in a request for additional information and
' will substantially delay final review and approval of the project.
Applicants Initials
N/A Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest
1 with leaf litter.
Pre-Form Scour Holes are on flat slopes only
No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
iulA Bypass method is specified (if applicable) and plan details and calculations are provided
tilt) Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
N ri No structures are located in protected buffers.
MA Plan details for the bypass and outlets are provided.
/A The operation and maintenance agreement includes annual erosion and vegetation repair.
4 The operation and maintenance agreement signed and notarized by the responsible party is provided.
i' * Level spreaders in series can be used on slopes of up to 159% in forested areas with leaf littler cover or on slopes of
up to 25% in areas with thick ground cover or grass if designed according to the Draft Level Spreader Design Option
Document. This potentially requires a minor variance in protected buffer areas. In any event the second level spreader
cannot be located in Zone 1 of a protected buffer area.

DWO Project No.
DIVISION OF WATER QUALITY - LEVEL SPREADER WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Brier Creek Village Center
Contact Person: Brandon Plunkett [phone]
Phone Number:
' Level Spreader ID: FES57
Level Spreader Length N/A. (perpendicular to flow)
Drainage Area 1.17 ac. (on-site and off-site drainage to the level spreader)
t Impervious Area 1.0 ac. (on-site and off-site drainage to the level spreader)
Maximum Filter Strip/Buffer Slope N/A (6% for forested, leaf littler cover, 8% for thick ground cover)*
' grass
Max. Discharge from a 10 Year Storm 22.46 cfs
Max. Discharge to Level Spreader 2.24 cfs
' Filter Strip/Buffer Vegetation N/A (thick ground cover or grass, canopied forest with leaf litter
groundcover)
Pre-treatment or Bypass Method By-Pass
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach an explanation of why. At a minimum, a
' complete stormwater management plan submittal includes a worksheet for each BMP, design calculations, plans and
specifications showing all BMPs and outlet structure details, a detailed drainage plan and a fully executed operation
and maintenance agreement. An incomplete submittal package will result in a request for additional information and
will substantially delay final review and approval of the project.
Applicants Initials
Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 100 ft per cfs in canopied forest
with leaf litter.
' 41A _ Pre-Form Scour Holes are on flat slopes only
No structures are located in protected buffers*
If bypass method specified in the Draft Level Spreader Design Option Document:
-Bypass method is specified (if applicable) and plan details and calculations are provided
Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the
bypass discharge.
No structures are located in protected buffers.
Plan details for the bypass and outlets are provided.
' The operation and maintenance agreement includes annual erosion and vegetation repair.
?ff?The operation and maintenance agreement signed and notarized by the responsible party is provided.
' * Level spreaders in series can be used on slopes of up to 15% in forested areas with leaf littler cover or on slopes of
up to 25% in areas with thick ground cover or grass if designed according to the Draft Level Spreader Design Option
Document. This potentially requires a minor variance in protected buffer areas. In any event the second level spreader
cannot be located in Zone 1 of a protected buffer area.
LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT

u

The level spreader system is defined as the bypass junction box, the level spreading slotted
drain and associated pipe and the bypass outlet pipe.
Maintenance activities shall be performed as follows:
1. Every six months:
a. Inspect the level spreader system for sediment accumulation, erosion, trash
accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that the full length of the level
spreader functions as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover,
mow vegetative cover to maintain a maximum height of six inches, and remove trash as
needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.)
quarterly to maintain proper functioning.
4. Remove accumulated sediment from the level spreader system semi-annually using
cleanout structures at the end of each length of level spreader. Removed sediment shall
be disposed of in an appropriate manner and shall be handled in a manner that will not
adversely impact water quality (i.e. stockpiling near a stream, pond, etc.).
5. All components of the level spreader system shall be maintained in good working order
6. A level elevation shall be maintained across the entire flow spreading structure. Any down
gradient erosion must be repaired and/or replanted as necessary.
I acknowledge and agree by my signature below that I am responsible for the performance of
the seven maintenance procedures listed above. I agree to notify DWQ of any problems with
the system or prior to any changes to the system or responsible party.
Print name: Mr. Paul Herndon
Title: Preside
Address:_8211 Brier Creek Parkway. Suite 103
Phone:- 121-2700
Signatur
Dater ?r
Note: The legally responsible party should not be a homeowners association unless more than
50% of the lots have been sold and a resident of the subdivision has been named the
president.
Page t of 2

r'

a Notary Public for the State of
County of f,,?? , do hereby certify that
Q(AU\ ?,cCridnYA personally appeared before me this day of
'r, rc , and acknowledge the due execution of the forgoing wet
[wetland] detention basin maintenance requirements. Witness my hand and official seal,
HANCY MITE MAN
NOTARY FUCM
SEAL
My commission expires q?O`\
Page 2 of 2

' JB58A -JUNCTION BOX WITH INTERNAL WEIR
DESIGN
10

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
" [phone] Fax [phone]
PAGE OF
CHECKED BY
' J R McA JOB N,,OO.r. / DATE 3 ?S? ? BY ?• /?? 5 ,'?
9'e1z'e C.CEE,t / 4C Y (Date)
CLIENT A,./ PROJECT •?t?a
SUBJECT ?!- 6770" //OX / /?UT?YM?"L ? R yrJ?O ?
T/358A srr r-`'g.. Q 58 STA Z?lto??
10 ML row F&%A, l- -f 5 (/ 'HQ e_>70"
Z. Z4 Qom'
' -? wmVib ?e4 . 13 L,F• of &NlL rte Lf fav-
} 2.7-4 CPs * IS L4F = S1. I'?- 'c- 1U ?
6viodY)
I cr-s
'It k HI-W124ut'lc. 6z t e- (aNr l?,?iQ ?L Vr9'Tao,V Cf'it G/
6R. -CUr = 353.42
Pi-
-Fop of Love- U4" `36 = 3?3.5a 6miNl, v%"0A)
' C•? vapwFy 16-Y2 STM4?4 S mg iii SPLA7-rE_ 80x (Z$59A)
-? -38FB? ear-?.= 3?5? • oo ' .
-? Q = 3 . a t? y 3fi
L 5.0 VIP% SG3 /,5.JS PT ??n ``?t?-r. W?t2 (scc otc-b,')
Q?6= FPZM. 'P-4S Fo2. 10-VP STUCK
JA = C 3( a )%
? = ZZ. g4 c,FC ''?3

353.42 FT + I.23 ::,> 359 . (o5 pr
at3 w;ll )Q*_prezw?
/- 3J,L,06
0ob

' JB58A -JUNCTION BOX WITH INTERNAL WEIR
DETAIL

10

t
t
Mks'
V n
r
NOTE:
UPSTREAM SIDE OF WEIR WALL
c SHALL BE GROUTED TO UPSTREAM
x INVERT ELEVATION.
?? COPE
?EPpER
t.EvfL SP
NOTE: INVERT UPSTREAM
SIDE OF WEIR = 321.90.
INVERT DOWNSTREAM SIDE
OF WEIR = 318.35.
STANDARD MANHOLE LID
TOP TO READ "STORM"
4vaA Topp'
? ?4 s ?3SG
MN ppq?p -cb
ALS
E;N NG
30 UV 28 0 P `?y ` Rw
An?t glk
js3sa ,
JUNCTION BOX WITH INTERNAL WEIR (c1B5?A)
N TS
STEP
(NpTETRiEgI?'A
5, pETgli PF
PI L1 NTH
cRpU T
FOR COST ESTIMATE
PURPOSES ONLY. 1?
X

JB58A - FIRST I"/HOUR FLOW CALCULATIONS
N

Scenario: Base

CB62

" ??.
59

' CB58 '
13
5
?JB48A LS OUT

i

FES56
P-3
B55

Title: Brier Creek Village Center Phases 11 and III Project Engineer: R. Akers, El / B.Plunkett, PE
x:1...\splitter design,2-15-05 1 in per hour.stm The John R. McAdams Company StorrnCAD v4.1.1 [4.2014]
' 03/15/05 04:03:57 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
Scenario: Base

III
Level Spreader Sheet
Label Rainfall Total Section onstructe Ground Hydraulic Hydraulic
Intensity System Size Slope Elevation Grade Grade
(in/hr) Flow (%) (ft) Line In Line Out
(cfs) (ft) (ft)
CB58 1.0 2.24 361.12 355.35 355.32
P-45 1.0 2.24 18 inch 5.92 355.32 353.42
JB48A 1.0 2.24 356.00 353.42 353.32
P45B 1.0 2.24 8 inch 1.79 353.32 352.89
LS OU 1.0 2.24 353.75 352.89 352.89
Title: Brier Creek Village Center Phases II and III Project Engineer: R. Akers, El / B.Plunkett, PE
x:L..lsplitter designt2-15-05 1 in per hour.stm The John R. McAdams Company StormCAD v4.1.1 [4.2014]
' 03/15/05 04:04:34 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
Profile
Scenario: Base
Label: C858
L
L
b l: CB5 Label: CB59
a
Rm: 361.62 ft
m: 361.62 It
Ri
Surrp:354.75 ft - - Sump: 357.00 It 362.00
361.00
360.00
359.00
358.00
Label: P-45B Elevation (ft)
Up. Invert: 352.50 ft
On. Invert: 35225 ft
L: 14.00 It
357.00
Sze: 8 inch
a 1.79% Label: JB48A
Rim: 356.00 It
Sump: 352.50 ft 356.00
Label: P-37
Up. Invert: 357.00 ft
Label LS GUT On. Invert: 355.90 ft
Rim: 353.75 ft -- L, 72.00 ft ._ 355.00
Surrp: 352.25 It Sze: 18 inch
S153%
354.00
Label: P-45
Up. Invert: 354.75 ft
On. Invert: 352.50 ft
- L: 38.00 ft 353.00
Sze: 18 inch
S5.92%
352.00
0+00 0+20 0+40 0+60 0+80 1+00 1+20 1+40
Station (ft)
Title: Brier Creek Village Center Phases 11 and III Project Engineer: R. Akers, El / B.Plunkett, PE
x:\...lsplitter design\2-15-05 1 in per hour.stm The John R. McAdams Company StormCAD v4.1.1 [4.2014)
03/15/05 04:03:33 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
JB58A - I O-YEAR STROM EVENT
CALCULATIONS/PROFILE
Scenario: Base
i
?•"-? CB62?
y i
/
59
/
CB58-/-' /
R45 JB58A
FES57
/
ii
i
,
1
i
i
,
/
S
j -32' FES56 \
P,
C655
f /
5
•
I
I
Title: Brier Creek Village Center Phases II and III Project Engineer: R. Akers, El / B.Plunkett, PE
xA...Uca-worMstormcad?phase ii and iii.stm The John R. McAdams Company StormCAD v4.1.1 [4.2014]
03/15/05 03:54:26 PM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
Scenario: Base

I0
Level Spreader Sheet
Label Rainfall Total Section onstructe Ground Hydraulic Hydraulic
Intensity System Size Slope Elevation Grade Grade
(in/hr) Flow (%) (ft) Line In Line Out
(cfs) (ft) (ft)
CB58 7.22 22.44 361.12 357.71 356.91
P-45 7.22 22.44 18 inch 5.81 356.91 355.22
JB58 7.22 22.40 356.00 355.22 353.98
P-45A 7.22 22.40 18 inch 8.33 353.98 352.73
FES5 7.22 22.39 353.00 352.73 352.73
lie
Title: Brier Creek Village Center Phases 11 and III Project Engineer: R. Akers, El / B.Plunkett, PE
x:\...Vca-workl-stormcad\phase ii and iii.stm The John R. McAdams Company StormCAD v4.1.1 [4.2014]
I 03/15/05 04:13:27 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
Profile
Scenario: Base
s
1
1
1
1
1
1
1
1
1
1
1
1
1
Label: CB58
Rim: 361.62 ft
Sump: 354.75 ft
362.00
0.00
Label: P-45
Up. Invert 354.75 ft
Dn. Invert 352.60 ft.

_
00
158
L: 37.00 ft .
Size: 18 inch
S: 5.81 %
Label: JB58A
Rim: 356.00 ft
Sump: 352.50 ft /
Elevation (ft)
Label: FES57
Rim: 353.00 ft
Sump: 351.50 ft/,
354.00
I I / \ _ 352.00
W Label: P-45A
Up. Invert 352.50 ft
Dn. Invert 351.50 ft
L: 12.00 ft
Size: 18 inch
S: 8.33 %
350.00
0+00 0+10 0+20 0+30 0+40 0+50
Station (ft)
Title: Brier Creek Village Center Phases II and III Project Engineer. R. Akers, El / B.Plunkett, PE
x:\...\rca-work\stormcad\phase ii and iii.stm Tho John R. McAdams Company StormCAD v4.1.1 [4.2014]
03/15/05 04:14:12 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
C

FES56 - 1 O-YEAR STORM EVENT
CALCULATIONS/PROFILE
10
0
Scenario: Base
S59 '

A

- CB58
Rz

CB54 ?? ? '

FES56
p-32
CB 55

,
1

•
Title: Brier Creek Village Center Phases II and III Project Engineer: R . Akers, El / B.Plunkett, PE
x:\...\rca-worMstormcad\phase ii and iii stm The John R. McAdams Company StormCAD v4.1.1 [4.2014]
' 03/15/05 04:14:30 PM O Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
1
1•

L

Scenario: Base
Level Spreader Sheet
Label Rainfall Total Section onstructe Ground Hydraulic Hydraulic
Intensity System Size Slope Elevation Grade Grade
(in/hr) Flow (%) (ft) Line In Line Out
(cfs) (ft) (ft)
CB54 9.0 5.70 363.60 361.37 361.12
P-31 5.70 15 inch 0.90 361.12 360.45
CB55 9.0 6.68 363.60 357.07 357.00
P-32 6.68 18 inch 5.63 357.00 352.53
FES5 6.65 354.00 352.53 352.53
•
Title: Brier Creek Village Center Phases II and III Project Engineer: R. Akers, El / B.Plunkett, PE
x:1-.1rca-work\stormcad1phase ii and iii .stet The John R. McAdams Company StormCAD v4.1.1 [4.2014]
' 03/15/05 04:14:49 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06703 USA [phone] Page 1 of 1
w Illw w w w w Ilw w ¦w w w «w iw «ww w w ww w ¦w
S Ale
Scenario: Base
366.00
Label: CB55' Label: C654
Rim: 364.10 ft Rim: 364.10 ft
Sump: 356.00 ft Sump: 360.15 ft
364.00
362.00
360.00
Elevation (ft)
Label: P-31
Up. Invert: 360.15 ft
Dn. Invert: 359.50 ft
L: 72.00 ft 358.00
Size: 15 inch
S: 0.90 %
356.00
Label FES56
Rim: 354.00 ft
Sump: 352.00 ft Label: P-32
Up. Invert: 356.00 ft
Dn. Invert: 352.00 ft j 354.00
L: 71.00 ft
Size: 18 inch
S: 5.63 %
352.00
0+00 0+20 0+40 0+60 0+80 1+00 1+20 1+40 1+60
Station (ft)
Title: Brier Creek Village Center Phases II and 111 Project Engineer. R. Akers, El / B.Plunkett, PE
x:\...\rca-work\stormcad\phase ii and iii.stm The John IZ McAdams company StormCAD v4.1.1 [4.2014]
03/15/05 04:15:30 PM ©Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06703 USA [phone] Page 1 of 1
10
' FES56 - NCDWQ PRE-APPROVED SCOUR HOLE
DETAIL
Ie

PREFORMED SCOUR HOLE
Pipe o
Oui
Square
Scour F
(Rip Rai
8a sin m
f?r clari
avel and flush
aural ground.
B
D
W
d
SECTION A-A
Pipe or Duch
° e Outlet
PSRM
_ _p Vrnin d_ _ _ _Natural
Ground
Liner: Class -Rip Rap 1.4-131 -? ?1 tuC
.thick with Filter Fabric 4/4/02
?II' •
CULVERT VELOCITY DISSIPATOR
if)

19
' PRE-EXISTING SITE CONDITIONS
AT BRIER CREEK PHASE III
2005

Page 1 of 1
tXis- INc, w".,r Aof U,u.1MTS
http://imaps.co.wake.nc.us/output/raster_bw_02_GIS 101368132436855.png 3/11/2005
10
CULVERT SIZING CALCULATIONS
?10

co _A\
Cl)
c ? r l r } `, ?/ f l I ?, ? ? '•-?? i J'r--' _-? ^?? \\??~` =•? ?\ 1 C?~ i i f `,?,;\ - ??JJ?? , ?JJ
?a
X
Culvert Calculator Report
EW4 LGt.u.VClZT SIB I? ?C,?
lie
Solve For. Headwater Elevation
Culvert Summary
Allowable HW Elevation 357.50 It Headwater Depth/ Height 1.08
Computed Headwater El evation 354.95 ft Discharge (01) 331.00 cfs
Inlet Control HW Elev 354.62 ft Tailwater Elevation 330.00 It
Outlet Control HW Elev 354.95 ft Control Type Outlet Control
Grades
Upstream Invert 349.00 ft Downstream Invert 348.00 It
' Length 108.00 ft Constructed Slope 0.009259 ft/ft
Hydraulic Profile
Profile S2 Depth, Downstream 2.96 It
'
Slope Type Steep Normal Depth 2.79 It
Flow Regime Supercritical Critical Depth 3.60 It
Velocity Downstream 12.71 ft/s Critical Slope 0.004178 ft/ft
Section
Section Shape Circular Mannings Coefficient 0.013
Section Material Concrete Span 5.50 It
Section Size 66 inch Rise 5.50 ft
,mmhNumber Sections 2
' Outlet Control Properties
Outlet Control HW Elev 354.95 It Upstream Velocity Head 1.57 ft
Ke 0.50 Entrance Loss 0.79 It
Inlet Control Properties
' Inlet Control HW Elev 354.62 It Flow Control Unsubmerged
Inlet Type Square edge w/headwall Area Full 47.5 ft'
K 0.00980 HDS 5 Chart 1
M 2.00000 HDS 5 Scale 1
C 0.03980 Equation Form 1
Y 0.67000

a . C rgU},a, rh rArd,?ux?
--
-
42
' 9.
?
06o a
A = ?{p hc,. "•
69 --k ?te

x:\ ..\land\constructionVca-work\ew4.cvm The John R. McAdams Co CulvertMaster v1.0
03110/05 07:50:30 AM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
N
i
CULVERT PIPE DETAIL

4-G
Reinforced Concrete Sewer,
Storm Drain and-Culvert Pipe
Q Oldcastle
NCP
REINFORCED
Tongue and Groove
12 Foot Length (all sizes)
8 Foot Length (6011,66",72")
Specifications:
ASTM C 76 - Latest
CLASS III, IV,V WALL C
AASHTO M 170 - Latest
NCDOT JT
REINFORCED IN ACCORDANCE
TS J
WITH APPLICABLE SPECIFICATIONS ?GLn?A
s
With Confined "O" Ring Rubber
Gasket Joint Meeting ASTM C - 443 Latest and Joint of ASTM C - 361 Latest
MADE IN OUR SOUTH RALEIGH PLANT ID C1 ?6 TD CD

--
ID WT JT F(;D TD AS 01 GW GS GL TS AST WT/FT
30 4 4 3 6 33.996 33.468 .063 33.351 .377 4 1 1 8 476

36 4 3 3 16 40.316 39.787 .063 39.671 .377 4 1 1 $ 645

42 5 4 4 16 46.883 46.354 .063 46.238 .377 3
1
1
8
4 811
48 5 4 4 16 52.883 52.354 .063 52.238 377 3 1 1 1
8
1011
4
54 6 4 4 6 58.592 58.000 .094 57.763 .472
8 1.188 1
3
1226
2
60 6 3
4 t 3
4 6
65.092
64.500
.094
64.263
.4'72
8
1.188
1
2
1423
3
66 7 4 5'i
71.592
71.000
.094
70.763
.472
$
1.188
1
5
1791

1 32
72 7 3
4 6
5 1 77.871 77.279 .094 77.042 .472
1 4
1.188
1 5
[
2052
32
N.C. PRODUCTS P.O. BOX 27077 RALEIGH, NC 27611 [phone]
1-800-662-1983

I VELOCITY DISSIPATOR FLOW CALCULATION

?s

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Culvert Calculator Report
' EW4 (existing condition Vel Diss Sizing)
Solve For: Headwater Elevation
Culvert Summary
Allowable HW Elevation 357.50 ft Headwater Depth/ Height 0.56
Computed Headwater Elevation 351.70 ft Discharge 107.30 cfs
Inlet Control HW Elev 351.37 ft Tailwater Elevation 330.00 ft
Outlet Control HW Elev 351.70 ft Control Type Outlet Control

i Grades
Upstream Invert
Length 348.60 ft
108.00 ft Downstream Invert
Constructed Slope 348.00 ft
0.005556 ft/ft
'
Hydraulic Profile
' Profile
Slope Type
Flow Regime
Velocity Downstream S2
Steep
Supercritical
8.29 fUs Depth, Downstream
Normal Depth
Critical Depth
Critical Slope 1.74 ft
1.73 ft
2.00 ft
0.003214 ft/ft

Section
Section Shape
Section Material
Section Size
Number Sections Circular
Concrete
66 inch
2 Mannings Coefficient
Span
Rise 0.013
5.50 ft
5.50 ft

' Outlet Control Properties
Outlet Control HW Elev
Ke 351.70 ft
0.50 Upstream Velocity Head
Entrance Loss 0.74 ft
0.37 ft

Inlet Control Properties

' Inlet Control HW Elev
Inlet Type
K
M
C
Y 351.37 ft
Square edge w/headwall
0.00980
2.00000
0.03980
0.67000 Flow Control
Area Full
HDS 5 Chart
HDS 5 Scale
Equation Form Unsubmerged
47.5 ft'
1
1
1
?,n r
?o = IUD-. 30 O=S
pQEDEUEI.oPt-(»i C?t?? ??S L?r?e?v?-?vt:'?
' C= O"5,
•
x:\...\1and\construction\rca-work\ew4.cvm The John R. McAdams Co CulvertMaster v1.0
03/16105 04:21:20 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
1 0
SCOUR HOLE VELOCITY DISSIPATOR DESIGN
GUIDELINES
?I 1?

XI. RIPRAP-BASINS
The design. procedure for riprap 'energy dissi a based
on data obtained during a study "Flood Protection satsCulvert
OutfallsI (XI-1, XI-2) sponsored by the Wyoming Highway
Department and conducted at Colorado State University.
The purpose of the experimental program was to establish
relationships between flow properties and the dimensions
' of riprapped basins at culvert outfalls.
Tests were conducted with 6-inch, 12-'inch, 18-inch, and 36
inch pipes, and 6 by 12-inch, 6 by 18-inch, and 6 by 24-inch
model box culverts with discharges ranging from,.0'.l to 100
cfs. Both angular and rounded rock with an average.size
(d50) ranging from 1'.05 to 4..29 were tested. Two pipe slopes
were considered, 0 and 3.*75%. In all, 459 model-basins-were
studied..
The following conclusions were drawn from an analysis of
' the experimental data and observed operating characteristics.
The depth (hs) , length (L.), and'width . (W ) of the scour hole
were related to the characteristic size o riprap (d50),
' discharge (Q), brink depth (yo), and tailwater depth (TW).
The dimensions of a scour hole in a basin constructed with.
' angular 'rock were approximately the same as the dimensions
of -a scour hole in a basin constructed of rounded material
when rock •size'and other variables were similar,'
' When the ratio of tailwater depth to'brink depth (TW/yo) was
less than 0.75-and the ratio..of scour depth to size'of riprap.
(hs/d50)'was greater than 2.0, and the scour hole functioned
' very..efficiently as an energy dissip. ator.•
The concentrated
flow at the.cuivert brink plunged-into the hole,'a•jump formed
against the downstream extremity.of the-scour hole, and flow
was generally well.dispersed:as it left the basin.
' The mound.of material which formed on*the bed downstream
of the scour hole contributed to the dissipation of energy
and reduced the size of-the'scour hole; i.e.; if the mound
' from a stable scoured basin was removed and the basin was
again subjected to design flow, the scour hole enlarged
?--?? somewhat.
`? XI-1

For high tailwater basins (TW/yo'greater than 0:75) the high.
tained
t
re
velocity core of water emerging from the culver
assed through the basin, and
'as it
t
p
er
its jetlike charac
diffused'in a'manner very-similar to that of a concentrated
jet diffusing in a large body of water. As a result, the
scour hole was much shallower and generally longer. Con-
'
sequently, riprap may be.required for-the-channel downstream
of the rock-lined basin.
General details of the basin recommended'in this report are
'
of the basin are:
shown on figure XI-1. Principal features
1. The basin is preshaPed and lined with riprap.
• w
2. The surface'of the riprapped floor of the energy
dissipating pool is constructed at an elevation hs below
the culvert invert. hs is the approximate depth of scour .
•a thick pad of riprap, constructed at
i
c
n
ur
.that would oc
the outfall of'-the culvert, if subjected to the design
discharge. The.ratio of hs to.d50-of the material should
be greater than 2 and less than 4.
.3. The length-of the energy dissipating pool is.10(hs)
The overall length of the basin
or 3Wo which ever is-larger.
is.15(hs)'or 4% which ever is larder.
DtSIGN PROCEDURE
Estimate the flow properties at the brink•of the culvert..
1
.
Establish the brink invert elevation such that TW%yo<0.75
for design discharge.
For subcritical flow conditions (culvert set on mild
2
. .
or horizontal slope) utilize figures III-9 or III-10 to
obtain yo/D, then obtain Vo.by dividing.Q by the wetted
area associated with yo. D.is the height of .a box culvert.
If the culvert is on a steep slope, Vo will be the:.
normal velocity obtained by using the Manning equation
for appropriate slope, section, and discharge.
3. -From site inspection and from field--experience-in the ,.
i
s
area,.determine whether or.not channel protection
required at the culvert outlet.
XI-=2
e

4.. If channel protection-is require.d,.compute the•Froude
..number for brink conditions
(Ye=(:A/2) 1 ?z) .. Select
d50/Ye appropriate for locally available. riprap (usually
the most satisfactory results will be obtained if
0.25<d50/ye<0.45). -obtain hs/ye from figure.XI-2y and
check to-see that.2<hs/d50<4. Recycle computations
'if hs/450 falls out of this range.
5. Size basin as shown in figure XI-1.
6, Design procedures. where allowable dissipator exit velocity
is specified:
a. Determine the average normal flow depth in the
-natural channel for the design discharge.
b. Extended the length of the energy basin (if. necessary).
so that the width-of the energy basin at section
A-A, figures XI-1, times the average normal flow depth
.in the natural channel is approximately equal to
the design discharge divided by the specified exit
velocity.
7. In the exit region of the.basin, the walls and apron of
the basin should be warped (or transitioned) so-that
the cross section of the basin at the exit conforms to.
the cross.section of the natural'channel. Abr-Lipt.transition
of surfaces should be avoided to minimize separation
...zones and resultant eddies.
8. If high tailwater is a possibility and erosion protection
is necessary for the downstream channel, the following
design prgcedure 'is suggested:
Design a conventional basin for low tailwater conditions
in accordance with the instructions above. Estimate
centerline velocity at a series of downstream cross
sections.usirig the.information shown in figure XI-3.
Shape downstream -channel :and. size riprap using figure
II-C-1 and the stream velocities obtained above. Material,
construction techniques, and design details for riprap
should be in accordance with specifications in.FiEC No.
11 (XI-3)'-or-similar highway department specifications.
Design Example No. 1
Given: 8 ft. by 6 ft. box culvert, Q=800 cfs, supercritical
..flow in culvert, normal flow depth = brink depth
yo=4 ft., Tailwater depth TW=2.8 ft.
XI--3
Find: Riprap basin.dimensions for these conditions:.
..Solution:
1. yo=ye for rectangular section, Ye=4. ft.-
2 . Vo=Q/A=800/ (4 )' (8) =25 •fps.
3. Fr=V0/[(32.2) (Ye) ] 1/2=2.5/[(32.2) (4) ] 1/2=2.20
4. TW/ye=2.8/4.0=0.7 TW/ye<0.75, O.K.
5. Try -d50/Ye=O : 45', d50= (0.45) .(4') =1.80 ft.
From figure XI-2, hs/Ye=1.6
h'=(4) (1.6)=6.4 ft.
hS/d50=6.4/1,8=3•.6 ft. .2<hs/d50<4 ..O:K.
6. Ls= (10) (6.4)=64 ft:
Ls'.min=(3) (Wo)'=(3) (8)=24 ft., use.LS=64 ft. '
Lg=(15)-(6.4)=96 .ft.
Lg imin=(4) (Wo)=(4) (8)=32 ft., use LB=96 ft.
Othe'r..basin dimensions designed-in accordance with details
shown in figure'-XI-1.
Design- Example No. 2 .
Given: 8 ft. by 6 ft. box culvert; Q=800. afs, supercritical
flow in culvert, normal flow depth = brink depth,
yo=4 ft., tai-lwater depth,'TW =4..2 ft., downstream.'
channel can tolerate 7 fps for design dis.charge.
Find: Riprap basin dimensions for these conditions..
Solution:
Note--'High tailwater depth, TW/yo=1.05>0.75.
1. Design riprap basin (Design Example 1) use steps 1=7
d.50=1.8 -ft., hs=6,4 .ft., LS=64 ft., .LB=96 ft.
A. ..Design riprap for.downstream channel. Utilize
figure XI-3 for estimating average velocity along
the channel. -Compute equivalent-circular diameter
De for brink area from:
C?-.?De 4? (Yo) (4) (8)=32' ft. 2
De= C3 4) Tr
De=6..4 ft.
Vo =25 fps.- (Design Example 1)
XI-4

1.
L/De L Vr, Vo V Rock size d50
(Compute) (Figure XI-3) Figure II-C-1
ft. ft./ sec ft.
10 64 0.59 14.7
. 1.4
15 96 0.36
9.0 0.6
20 128 0.30 7.5
0.4
.21 135 0.28 7.0
0.4
Riprap should be at least the size shown. As a practical
consideration, the channel can be lined with the same size
rock used for the basin. Protection must extend at least
135 feet downstream from the culvert brink. Channel should
be shaped and riprap should be installed in accordance with
details shown in HEC No. 11.
Design Example No. 3
Given: 6 feet diameter cmp, Q=135 cfs, so=0.004., Mannings
n=0.024 normal depth in pipe for'Q=135 cfs is 4.5 feet,
normal velocity'is 5.9 fps, flow is subcritical,
tailwater depth (TW) is 2.0 feet.
Find: 'Riprap basin dimensions for these conditions:
Solution:
2.
3.
4.
Determine yo and Vo .
Q/Dz•5=135/(6)2.5=1.53
TW/D=2.0/6=0.33
From figure III-9, yo/D=0.45
Yo=(0.45) (6)=2.7 ft.
TW/yo=2.0/2.70=0.74 TW/Yo<0.75. O.K.
Brink Area (A) for yo/D=0.45 is
A=(0.343) (36)=12.3 sq. ft.
(0.343'is from table III-2)
Vo=Q/A=135/12.3=11.0 fps
Y A/2) '/'= 2 2_ --
e= ((12..3/2) -2.48 ft.
Fr=Vo/[ (32.2) (Ye) ] 1/2=11/[ (32.2) (2.48) ] 1 /2=1.23
Try d50/ye=0.25, d50=(0.25)(2.48)=0.62 ft.
From figure XI-2, hs/ye=0.75, hs=(0.75) (2.'48)=1.86 ft.
check: hs/d50=1.8.6/0:62=3, 2<hs/d50<4 O.K.
XI-5

5. Ls=(10) (hs)=(10) (1.86)=18.6 ft.
or Ls=(3) (Wo)=(3) (6)=18 ft., Use Ls=18.6 ft.
LB= (15) (hs) =(15) (1.86) =27.9 ft.
or LB= (4) (Wo)=(4) (6) =24 ft., Use LB=27.9 Tt.
d50=0.62-ft. use d50=8 in:
Other basin dimensions.are designed in'accordance with details
shown on figure XI-1.
The.design.procedure recommended in this chapter is a compro
mise between the design procedure utilizing the CSU experi-
mentally derived functional relationships and traditional
design methods for riprapped basins. It is recognized that
there-is some chance of limited degradation of the.floor
of the dissipater pool.for rare event discharges. With
the protection afforded by the 2(d50) thickness of riprap
by the heavy layer of riprap adjacent to the roadway prism,
and-the apron riprap in the downstream portion of the basin,
the damage should be superficial.
Concerning the use of filter material, several factors should
be considered. Bank material adjacent to a culvert is not
subjected to flow for long continuous periods: Also, the
.streambed material may be sufficiently well graded and not
require a filter. If some siltation of the basin accompanied
by plant growth is anticipated, it may be that a filter
will not be required.. If required, a filter cloth or filter
material.designed in accordance with instructions in reference
XI-3 should be specified.
DISCUSSION
CSU Design Procedure

1
!s
besign criteria were developed for three types of rock riprapped.
basins, the "standard non-scouring basin," the "hybrid
basin," and the "standard scoured basin" (X1-2). Experimental
data were used to establish empirical, relationships between
the-following dimensionless parameters:
1. Froude number at the culvert outfall.
.2. relative grain size of riprap
3. relative tailwater depth
4.. relative depth of scour hole
XI-6
*B

5. relative width of scour hole
6, relative length of scour-hole,
An e
ll
xce
ent correlation of data was achieved by utilizin
g
a weighted particle
i
s
ze (dm) for scalin the
Clprap. However, the weighted g grain 'size of
i
e
' ze, d ' is an
unfamiliar parameter to most hydraulic
ens
gineers*and is
also diffic
lt t
u
o obtain for quarry-run rock. For these
reasons, the more familiar d50 (the media
i•

' n.s
ze of rock
by weight) is used to characterize rock size in the desi
n
ro
d
g
p
ce
ures presented in this manual.
The design procedure suggested by the CSU study is also very
sensitive to tailwater depth and is somewh
t
b
a
cum
ersome to
use. The method requires a conversion of Froude numbers
when a culvert operates with a free surface (the usual case)
and requires a.conversio
f
' n o
Froude numbers from circular
pipe flow to rectangular pipe flow (or vi
ce versa) if the
designer wishes to use.the complete.range of-design data
f
b
or
oth pipe and box culvert basins. Because of these
complexities
a sim
lifi
d d
i
'
,
p
e
es
gn
procedure was developed.
The information and design.procedures from the
CSU'
-
studies
suggested the design parameters and the CSU data (XI-1) were
utilized fo
d
r
eveloping design relationships.
Design Procedure Develo ment
The design criteria specified in this report were developed
in the following manner
:
.1. All CSU scour data for circular and rectangular pipes,
angular and rounded material
sl
i
,
op
ng and horizontal
pipes for plain outfall conditions were used for develop-
ment of design aids. (Note, data for scour holes formed
below model culverts
' constructed with standard or
modified end sections
e
w
re not used and data for
ds0/ye<0.1 were-hot used.).

In all, data from 347 runs were used for.this_development.
This included data for.6-inch,'12-inch, 18-inch, and
36-inch pipes and 6 by 12-inch, 6 by 18-inch; and
6 by 24-inch model box culverts. Two pipe slopes were
considered, 0 and 3.75%. Discharges'ranged from 0.1
to 100 cfs for basins constructed with angular and
rounded rock.with median rock size (d50) ranging from
0.02 to 0.58 ft. Only data from runs-with gradation
coefficients ranging from 1.05 to•2.66 were-used.
XI- 7
9
a?
2.
The gradation,coefficient s is defined as
s = 1/2 (d84/d50 +d50/dl6)- .
and is a means of describing whether. the rock mixture
is predominantly one`size or a•range of sizes. When's
is near one,•all material is about the same size. .
Where rock•.sizes extend over a large range, stakes
on larger values.. The gradation coefficient s of riprap
-will be satisfactory for•• design purposes if the gradation
curve,;for -the riprap is-similar to curves for rock
A(24).:;or B(16) shown in figure 8 of HEC No. 111.1 (XI-3).
Based.upon an examination.bf CSU plots and data, the
,following significant dimensionless parameters were
selec.tedi
defined as
a• d50/ye--t.h.e relative size of riprap
ize by weight of the
di
'
an s
of the me
the.ratio
rock mixture to the. equivalent depth of water
.....
the brink-of the culvert. The equivalent depth
at
.
ye is defi9ed.as. the brink depth for box culverts,
-rectangular'sections, where
1 2
for non
.and (A/2)
the wetted' area at the brink of the 'culvert..
A is
.
ye .computed iri this manner is the height ofa .
it'is high with an
rectangle twice as wide as
area equal to'the wetted area•of the non-rectangular
section.
b• hs/ye--the relative'depth of scour. hs is the
ert of the culvert at the brink
i
nv
depth. from the
to the lowest point in the scour hole.(figure.

C. Fr = Vo/[(g)(ye)]1/2--the Froude number at the
velocity'
brink, of the culvert-. Vo is the average
k of the culvert (discharge
b
i
n
r
of flow at the
Q divided by wetted''area, A) and g is the acceleration
b
er
of gravity. This definition of the Froude num
verting
f
e
con
ps o
eliminates the-intervening st
ipe flow and Froude
full-
t
l
p
o
ow
non-full pipe f
numbers for circular pipe flow to Froude.numbers
for rectangular pipe flow (or vice versa) as is
required by the CSU.procedure.
TW.is
d.-TW/ye---the relati
p
•
referenced
water
the depth of tai1
: invert. '
XI-8

• '
3. The dimensionless. aram
p eters' cited above were computed
'
' for
each set of data and were segregated into the
f
ollowing-categories:
0.10 < d50/Ye < 0.2.
0.21 < d50/Ye < '0:3
0.. 31 < d50/Ye < 0.4
0.41 < d50/Ye < 0'.5
' 0.51 < d50/Ye < 0.6
0.61 .<. d50/Ye 0•.7
' 4._ For. each subset of data (as an example, all data for
the condition that 0.21 < d50/Ye<0.30) the data were
• further subdivided into the following categories:
a.. model pipe culverts with a 'diameter equal to or
less than 1 ft.,. basin constructed with rounded
material,
b'. model pipe culvert with a diameter equal to or
-less than 1 ft., basin-constructed with angular .
•
1 material,
c. model pipe culvert with a diameter greater than
1 ft., basin constructed with rounded material,
d. 'model pipe culvert:with a 'diameter greater'than
l.ft., basin constructed with angular•material,
and •
e. model box culverts with a height of 0.5 ft.-,
basin constructed with rounded material (the only.
material. tested for box-culverts).
5. A symbol associated with the-magnitude of the relative
..tailwater depth (in increments of 0.2.) was-assigned
' to each.data point for each of the categories•designated
in 4) above (i.e., if TW/ye = 0.51 for a.particUlar
run, the symbdl.associated with 0.41<TW/Ye<0.6 was.
' assigned to the-data point). -•

x 6..- A series of plots of relative depth of scour. hs%ye
versus the Froude number Vo/[(9)(Ye)]1/2 were constructed
' with the relative size of riprap d50/Ye as a third variable
.
-By symbol and color code the various categories described
in 4) and 5) above could be identified on the plots.- Addi-
tional supplemental plots were also constructed to help
identify significant parameters.

0
The parameters selected grouped the data in a systematic way
though there was significant scatter. Scour depth did not
appear to be a function of angular or rounded riprap. Data
from pipe runs could not be segregated from data for box
.culvert. ' The .only- scale effect that-could be detected were
associated with high Froude number ( >3.0.) runs where model
flow depths•were'on the order of one-half foot with tailwater
depths of 0 to 2.inches. The scaled•riprap was approximately
one-half inch in size.
Because of the difficulty in obtaining-precise measurements
in models of this -size -and also 'because of the possibility of
scale effects with small scale models these data points were
not given quite as. much consideration when design curves .
were.:dev.eloped. However, these. data were used*to establish the
approximate slope of design curves..
.Relative tailwater depth was'a-significant variable. For
conditions where all other-variables were similar, maximum
scour depths were associated with low tailwater depths.-
Maximum length of scour holes were associated with high tail--
water depths.
When considering.a,culvert installation, several points are
obvious.. For ephemeral, flashy streams usually associated,
with culvert crossings, the tailwater depth will..lag
significantly when the stream is rising. Thus, l:ow.tail-
water will always exist at least.up to*the point when and
if equilibrium conditions occur.. Also, because of seasonal
changes in vegetation, changes in downstream.channel cross*
section as a result of flood events or man's activity, and the
general difficulty in obtaining.channel properties in poorly
defined ephemeral streams, the computed tailwater depth will
be at best an estimate.. For these reasons it was decided
to base design criteria on the assumption-that the worst
possible tailwater.conditions exist, i:e., low tailwater
conditions:
On the basis of ..the above assumptions, envelope curves- were
constructed for each plot of hs%ye . l
with d50/ye as the-third variable.
On?.each plot, the curve was drawn to the left of approximately
98% of the data points and thus,the predicted scour based
on.the use of a curve.will, be as deep or deeper than was
-actually measured in'the model basin for the worst.possible
tailwater condition.. These envelope curves were then trans-
posed to one plot* (figure XI--2) and are the basic-design
curves for determining.hs as a function of exit velocity;-
..equivalent brink depth, and d50-
XI-10
s0
-o
0 A

`1
A
M

' Additional information necessary to design a basin includes
geometric dimensions, minimum thickness of riprap, approxi-
mate shape of gradation curve of riprap, sideslopes of basin,
and a determination of whether or not a filter blanket is
' required.
Length of Basin
Frequency tables for both box culvert data and pipe culvert
data of relative length of scour hole (Ls/hs<6, 6<Ls/4s<7,
7<Ls/hs<8 . . . 25<Ls/hs<30), with relative tailwater depth
TW/ye in increments of 0.1 feet as a third variable were
constructed utilizing all data from 347 experimental runs.
For box culvert runs Ls/hs.was less than 10 for 78% of the
data and Ls/hs was less than.15 for 98% of the data. For
pipe culverts, Ls/hs was less than 10 for 91% of the data
and, Ls/hs was less than 15 for all data.
For all cases the data considered were restricted to relative
tailwater depths of less than 0..75. Large values of relative
length of scour Ls/hs were always associated with high
tailwater.conditions. The curves to be used to-predict
hs (the value of hs to be used for computing Ls the length
of energy dissipating pool, in the design procedure) are
based on maximum observed scour depths which in turn were
' always associated with minimum tailwater depths. Based
on this argument, a conservative prediction rz.io for
obtaining a design estimate of relative length of preshaped'
scour hole is Ls/hs>10 and relative overall length of
' basin is LB/hs>15. From a practical viewpoint, the length
-of the pool Ls should be at least'3Wo and LB should be at
least 4Wo. WO is the width of'the oulvert•outlet. The
' dimension LB is the out-to-out length of the riprap basin
measured from the-culvert brink to the end of the basin.
Other Basin Details.
¦ The 2(d50)• or 1.50(dmax) , dmax is the maximum size of rock*
in the riprap mixture, thickness of riprap for the floor
and•sides of basin are based on experience with conventional
riprap design. Thickening of the riprap layer to 3(d50)__
.or 2(dmax) on the foreslope of the roadway culvert outlet
r is warranted because of•the severity of attack in the area
and the•necessity for preventing significant undermining
and- consequent.collapse of the culvert.

XI-11

0
so
A•3:1 flare angle is recommended for the basins walls: This
dissipating
angle will.provide a sufficiently wide energy
pool for good basin operation.
The mixt ure of stone used.for.riprap should meet the specifi-.
cations (material, gradation, etc.) described in HEC
No. 11, (Xl=3) .
RIMENTAL
XI-1. Stevens. M. A., and Simons, D. B., EXPE
FOR STUDIES OF SCOUR IN
PROGRAMS.AND BASIC DATA
RIPRAP AT CULVERT OUTFALLS, Colorado State University,

=Fort Collins, Colorado, CER 70-71-MAS-DBS-57,•1971. Q
XI-2. Simons, D. B., Stevens, M. A., Watts, F. J., FLOOD
Colorado State
T OUTLETS
,
•:?>ROTECTION AT CULVER
University, Fort Collins, Colorado, CER 69-70 DBS- a
MAS;-FJW4, 1970..
XI-3. U. S. Department of Transportation, USE OF CRIPRAP

draul ngineering
H
ircular
TION
y
,
FOR BANK PROTEC
,No: 11, Government Printing Office, Washington, D.C.,
Amok
.1967.
.XI-4. U..S. Army, Corps of Engineers, RIPRAP STABILITY
TESTED IN LARGE- AND SMALL-
ON EARTH EMBANKMENTS
SCALE WAVE TANKS, Technical Memorandum No: 37, Coastal
Engineering Research Center, Washington, D.C.,
1972. _
a

I SCOUR HOLE VELOCITY DISSIPATOR CALCULATIONS
10

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
PAGE I OF
J R M.A JOB NO. ML-OA O(00 DATE ?J BY F• fl"'C"5, 81 CHECKED BY
(Date)
CLIENT 13LI CXM?y ?"rte"`" y?,, PROJECT
,?t7t
SUBJECT IJCiIA? t? ;GI`ry I?1Ss)PFt?iZ LC' S
G1vEN (2)(0(0'' ?cP ?ut.va?aTS , n =v.v?3 s? = 00 515e,
Gas CPC e. PIP>;)
• ? = 8.29 FPS
• Tw= I.? ?
eECE-n t) \lb & V.
Tom/ - o • 3v
Flo ?b= O.2`ls CF(G 4•?-?-?
1.0?- - • ?-?(G ? Tr?1LVu??12--co?.»? ? C c+??.
- ?ee.= O, l8°IO C5.5?? = 5.?-Z Sr C?"?g?G 3-?7?
` / p Fee-- 3 ?s 932 FPS
7-T- = P?F - I - (.,I F-rl-
?? 32.2 ? 1•L/??l
4? del. o? SC©Ka.?n?? ? ?l?e I
Cts? = D•? dso` x•51 C?o?,?IPRRP) (F1Gu(Z,E XI-'?,
y?
5.)LENG?1 01= 2tP(L?P e/as,n? ??/o ?tPG.?P r?+?Nt??.?
(?= 15??5)= l?=c)F
to 2-IP2.gP U}{?*»v
t
- AS"te ?o QtPQ ?e- ??? z 2•?D
V? g.5 ITS CF(G # -G. I)
- = o.9l
CFIG
?G
19
SCOUR HOLE VELOCITY DISSIPATOR DETAILS

1??
i
rn
v
N
U
Y
CL
0
N
v
0
wLo
0
0
1 0
0
m
3
,o
m
0
v
0
CC
3
c?
7
C
0
U
N
C
8
0
O
5
C
0
U
7
N
C
O
U
a
c
0
J
C
0
1U
9
N
N U
O
L
WARP BASIN TO CONFORM TO NATURAL
STREAM CHANNEL. TOP OF RIP RAP IN
FLOOR OF BASIN SHOULD BE AT THE
66' RCP SAME ELEVATION OR LOWER THAN NATURAL
CULVERTS CHANNEL BOTTOM A-A
TOP OF BERM
TOP OF RIP RAP
TOP OF NATURAL
CHANNEL
A
0 10' DISSIPATOR POOL CHIANNEL BED
1
HORIZONTAL
BRINK DEPTH (Qld'
2.90 FT (1 FOOT FREE hs 1.0'
BOARD MINIMUM) F22 THK NCDOT
CLASS B RIP RAP
CL SECTION
N.T.S.
CONCRETE
ENDWALL
BERM
TOP OF RIP RAP
RIP RAP
NOT SHOWN
APPROXIMATE
EDGE OF WATER
D
IP RAP LINE[
CHANNEL
w
J
7
U
2y1 I HORIZONTAL I 2:
a
D
HALF PLAN
N.T.S.
SYMMETRIC A
CL ENDWALL
ENGINEERED RIP RAP SCOUR HOLE
N.T.S.
APPROXIMATE
-EDGE OF WATER
EXISTING
CHANNEL BED
x ?_

SCOUR HOLE VELOCITY DISSIPATOR SUPPORTING
REFERENCES/TABLES

? lie
STONE WEIGHT IN P '
OUNDS ,
1 5 1020 40 0 nn 200 400. 600^^1000 .2000 4000
t
26 t
24
22
20
,t
Q
16
O
. •.
U
W
N
2
W
a 14
LL y <
Z 1
0 1 .
W
H ING
X
w 8 165 -LBS. PER CU. FT.
E
4
2
0
I ?..
3 /
' EQUIVALENT SPHERICAL DIAMETER OF STONE, IN FEET 4 .
FIGURE IIC-1. RIPRAP SIZE .FOR USE DOWNSTREAM OF ENERGY
DISSIPATORS FROM REFERENCE IIC.
7?' , ..
II-4
v. a
Q.8 0
0.7 v' v °
116 v Rectangular Orifice into an infinite basin
0.5 (VLIAVE ° Average Velocities L Feet Downstream from brink i Circular Orifice into an Infinite Basin
VAVE ° Average Velocity at Outlet
0.4
(VL) AVE ,

VAVE Design Cure
0.3 W
0
O V AV E
SYm ft cis fps 'ft TW
? 1.45 ?2b 167 1.8
' ? 1A5 74. 143 1.6
0.2 0 307 65.4 9.3 307

,yQ • 307
v 1.45 84.0
249 11.9 3.07
14.0 1.25

Ln v 1.45
I 139 9 3 1.25
NOTE: For partially full circular sections or non circular brink areas, convert
wetted cross sectional area to an equivalent circular area with diameter W.
1. 2 3 4 5 6 7 8 9 10
. 20 30 40 50 GO 70. 80 90 100.
L Distance Downstream from Plane of the Outlet
WO a Culvert Width
Figure XI - 3 Distribution of Centerline Velocity for Flow from Submerged Outlets from Referents XI • 2
to be used for Predicting Channel Velocities Downstream from Culvert Outlet where High Tailwater prevails.
Velocities obtained from the use of this Chart can be used with Figure 2 of HEC No. 11 for sizing iiprap
(DO not use Figure 1 HEC No. 11, use Mean Velocity Values)
a • •

1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
Yo
D 0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
s. o
?
/
0 /D 2.5 =5.5 F

5.0 r
do, ,

... 4.0

0-* W-14

-
r
35
3.0
25
12
0

1.5
• 1.0

5
0
. Yo
0/D 2.5 _ 0
Y. s brink depth
D = dia. of culvert
TW = tailwater depth

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
TW/D
Figure 4.5.7 Dimensionless Rating Curves for the Outlets of Circular Culverts on Horizontal
and Mild Slopes
(Source: USDOT, FHWA, HEG14, 1983)
4.5-14 Georgia Stormwater Management Manual
Volume 2 (Technical Handbook)
Table-3-3 Chapter 3
0.02
0.03
0.04
0.05
0.06
0.07
0.08
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0.0105 0.0262 0.00138 7.38
0.0147 0.0325 0.00222 6.55
0.0192 0.0389 0.00328 5.95
0.0294 0.0451 0.00455 5.47
0.0350 0.0513 0.00604 5.09
0.0378 0.0575 0.00775 4.76
0.0409 0.0635 0.00967 4.49
0.0470 0.0695 0.01181 4.25
0.0534 0.0755 0.01417 4.04
0.0600 0.0813 0.01674 3.86
0.0668 0.0871 0.01952 3.69
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0.2621 0.263 1.362
0.2649 0.271 1.336
0.2676 0.279 1.311
0.2703 0.287 1.286
0.2728 0.295 1.262
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0.19 0.0139 0.1152 0.0365 3.06 0.69 0.5780 0.2948 0.380 1.024
f 0.20 0.1118 0.1206 0.0406 2.96 0.70 0.5872 0.2962 0.388 1.004
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0.22 0.1281 0.1312 0.0492 2.79 _ 0.72 0.6054 0.2987 0.402 0.965
0.23 0.1365 0.1364 0.0537 2.71 0.73 0.6143 0.2998 0.409 0.947
0.24 0.1449 0.1416 0.0585 2.63 0.74 '0.6231 0.3008 0.416 0.928
0.25 0.1535 0.1466 0.0634 2.56 0.75 0.6319 0.3042 0.422 0.910
0.26 0.1623 0.1516 0.0686 2.49 0.76 0.6405 0.3043 0.429 0.891
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:. 0.28 0.1800 0.1614 0.0793 2.36 0.78 0.6573 0.3041 0.441 0.856
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32 0.2167 0.1802 0.1027 2.14 0.82 0.6893 0.3043 0.463 0.787
.33 0.2260 0.1847 0.1089 2.09 0.83 0.6969 0.3041 0.468 0.770
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0.36 0.2546 0.1978 0.1284 1.958 0.86 0.7186 0.3026 0.458 0.720
0.37 0.2642 0.2020 0.1351 1.915 0.87 0.7254 0.3018 0.485 0.703
0.38 0.2739 0.2062 0.1420 1.875 0.88 0.7320 0.3007 0.488 0.687
0.39 0.2836 0.2102 0.1490 1.835 0.89 0.7384 0.2995 0.491 0.670
0.40 0.2934 0.2142 0.1561 1.797 0.90 0.7445 0.2980 0.494 0.654
0.41 0.3032 0.2182 0.1633 1.760 0.91 0.7504 0.2963 0.496 0.637
0.42 ' 0.3130 0.2220 0.1705 1.724 0.92 0.7560 0.2944 0.497 0.621
0.43 0.3229 0.2258 0.1779 1.689 0.93 0.7612 0.2921 0.498 0.604
0.44 0.3328 0.2295 0.1854 1.655 0.94 0.7662 0.2895 0.498 0.588
0.45 0.3428 0.2331 0.1929 1.622 0.95 0.7707 0.2865 0.498 0.571
0.46 0.3527 0.2366 0.201 1.590 0.96 0.7749 0.2829 0.496 0.553
0.47 0.3627 0.2401 0.208 1.559 0.97 0.7785 0.2787 0.494 0.535
0.48 0.3727 0.2435 0.216 1.530 0.98, 0.7817 0.2735 0.489 0.517
0.49 0.3827 0.2468 0.224 1.500 0.99 0.7841 0.2666 0.483 0.496
0.50 0.3927 0.2500 0.232 1.471 1.00 0.7854 0.2500 0.463 0.463
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FLOOR OF BASIN SHOULD BEAT THE SAME ELEVATION OR LOWER THAN NATURAL. N? • (VOTE 6
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SECTION AREA AT SEC: A-A) - SPECIFIED EXIT VELOCITY.
NOTE B - WARP BASIN TO CONFORM TO NATURAL STREAM CHANNEL. TOP OF RIPRAP IN
FLOOR OF BASIN SHOULD BE AT THE SAME ELEVATION OR LOWER THAN NATURAL
CHANNEL BOTTOM AT SEC. A-A.
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HALF PLAN
• . FIGURE X7-1. DETAILS OF RIPRAPPED CULVERT ENERGY BASIN
BERM AS REQUIRED
TO SUPPORT RIPRAP
EXCAVATE TO THIS LINE,
BACKFILL WITH RIPRAP
2
BERM AS REQUIRED
TO SUPPORT RIPRAP
2 d50 OR 1S dMAX
EXCAVATE TO THIS LINE,
BACKFILL WITH RIPRAP
?`-BERMASREQUIRED
TO SUPPORT RIPRAP
d50 0R 1.5 dMAX .
ill
' MASTER PLAN
BRIER CREEK VILLAGE CENTER
' PROPOSED PLANNED DEVELOPMENT DISTRICT
186 ACRES
' GLOBE ROAD AT INTERSTATE 540
t
OWNER:
BRIER CREEK ASSOCIATES LIMITED PARTNERSHIP
' CONSULTANTS:
' Lacy H. Reaves - Attorney
Michael R. Thornton -- Attorney
The John R. McAdams Company, Inc. - Land Planners and Civil Engineers
January 28, 2005
' 2/1/05 3:28 PM 124761.16
0006515.00063 LID: Raleigh
' TABLE OF CONTENTS
Page
I. INTRODUCTION ...............................................................................................................................1
II. LOCATION AND CONTEXT ..........................................................................................................1
III. THE DEVELOPMENT CONCEPT ..................................................................................................3
IV. BRIER CREEK VILLAGE CENTER MASTER PLAN ..................................................................3
A. Tract A ...............................................................................................................................5
' 1. Uses .............................................................................................................................5
2. Building Height .........................................................................................................6
3. Building Setbacks and Streetyards .........................................................................6
B. Tract B ................................................................................................................................ 6
' 1. Uses .............................................................................................................................6
2. Building Height .........................................................................................................7
3. Building Setbacks and Streetyards .........................................................................7
C. Tract C ................................................................................................................................ 7

1 1. Uses .............................................................................................................................7
2. Building Height ..................................................................................................... 8
' 3. Building Setbacks and Streetyards .........................................................................8
D. Tract D ...............................................................................................................................8
' 1. Uses .............................................................................................................................8
2. Building Height .........................................................................................................9
3. Building Setbacks and Streetyards .........................................................................9
E. Tract E ................................................................................................................................9
' 1. Uses .............................................................................................................................9
2. Building Height .......................................................................................................10
3. Building Setbacks and Streetyards .......................................................................10
V. STANDARDS AND CRITERIA APPLICABLE TO BRIER CREEK VILLAGE CENTER ..... 10
A. Interconnectivity ............................................................................................................10
B. Pedestrian Orientation ..................................................................................................11
' C. Public Transit ..................................................................................................................11
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TABLE OF CONTENTS
PAGE
D. Open Space; Environmental and Aesthetic Concerns ............................................. 12
E. Vehicular Parking .......................................................................................................... 13
F. Unity of Development ................................................................................................... 14
G. Transitional Protective Yards ....................................................................................... 14
H. Landscape Maintenance and Location ........................................................................ 14
I. Stormwater Management ............................................................................................. 14
J. Annexation ...................................................................................................................... 15
K. Utilities ............................................................................................................................. 15
L. Development Pattern and Design ................................................................................15
M. Proximity to RDU International Airport ................................................................... .16
N. Tree Preservation .......................................................................................................... .16
0. Minimum Lot Size ......................................................................................................... .16
VI. ALTERNATIVE MEANS OF COMPLIANCE WITH RESPECT TO
CODE SECTION 10-2057 .............................................................................................................16
VII. PHASING .......................................................................................................................................19
VIII. AMENDMENTS AND APPROVAL ..........................................................................................20
A. Administrative Changes ............................................................................................... 20
B. Planning Commission Changes ...................................................................................21
C. City Council Changes ....................................................................................................21
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1 1.
INTRODUCTION
This document and the accompanying exhibits (collectively, the "Master Plari')
are provided pursuant to provisions of the Raleigh City Code (the "Code") dealing with
the Planned Development Overlay District for Brier Creek Village Center, a multiple-use
development site owned by Brier Creek Associates Limited Partnership. Brier Creek
Village Center will be a pedestrian-oriented development with complementary
residential, recreation, institution/civic/services, office, and commercial land uses (as
those terms are utilized in Section 10-2071 of the Code) at densities appropriate to the
location of the development, the nature of adjoining and nearby land uses, and Brier
Creek Associates Limited Partnership's, the City of Raleigh's and the State's investment
in existing infrastructure. All references in this Master Plan to "office" uses shall
include institutional/civic/services uses and recreational and commercial uses
permitted in the Office and Institution-1 District.
II. LOCATION AND CONTEXT
The Master Plan for Brier Creek Village Center deals with approximately 186
acres located along the eastern right-of-way of Globe Road to the south of Brier Creek
Parkway, and north of Interstate 540 (the "Property"). The Brier Creek residential and
commercial areas are located north and east of the Property.
Brier Creek Village Center is within the area of the recently approved Brier Creek
Village Center Small Area Plan (the "Small Area Plan") of the Raleigh Comprehensive
Plan. The area addressed by the Small Area Plan is designated a Regional Intensity Area
within the Triangle Regional Center. This designation encourages a high intensity
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development pattern with multiple uses. This Master Plan implements the Village
Center concept contemplated by the Small Area Plan, which creates synergy among the
various uses located upon the Property by coordinating public/private infrastructure
elements and physically integrating buildings and activities within the Village Center
through a network of pedestrian-oriented streets, walkways and public-space, which
connect the Property to surrounding greenways and the public school/park site located
on adjacent land at the intersection of Brier Creek Parkway and Globe Road (the "Park
Tract"). Such functionally integrated development will allow for an interactive, street-
oriented center as contemplated by the Small Area Plan.
The Property is now subject to Ordinance (1996) 929 ZC 392, which approved
Zoning Case Z-65-96. This ordinance zoned the Property Thoroughfare Conditional Use
District and established maximum densities for development upon the Property as set
forth in the conditions of Z-65-96. If approved, this Master Plan and the accompanying
zoning case will supersede and replace Z-65-96 as it relates to the Property.
Accordingly, the conditions of Z-65-96 will no longer be applicable to the Property.
This case requests that except as hereafter provided, the Property be rezoned to
Thoroughfare Conditional Use District and be overlaid with the Planned Development
District. It is requested that the portion of the Property thirty-five (35) feet in width
along Brier Creek Parkway between Street "B" and Street "C" shown on Exhibit C-2 and
designated for a transit easement be zoned Shopping Center Conditional Use District
and be overlaid with the Planned Development District.
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III. THE DEVELOPMENT CONCEPT
Brier Creek Village Center will consist of five (5) development tracts which are
designated Tracts "A", "B", "C, "D" and "E." This Master Plan incorporates the three
(3) activity nodes identified in the Small Area Plan, which are located along a central
pedestrian-oriented street ("the Village Main Street"), traversing the site from east to
west and connecting Globe and Lumley Roads. This Village Main Street, which is
identified as Street "A" on Exhibit C-2, will consist of up to a sixty-eight (68) foot public
right-of-way in width that will include, where applicable, two (2) travel lanes, and a
minimum twelve (12) foot public landscape/ sidewalk area on each side. The
Community Center Activity Node shown on Exhibit C-2 includes a medium to high
density residential area located on Tract B adjacent to the Brier Creek Elementary
School/ Community Center located on the Park/School site shown on Exhibit C-2. The
Village Center Activity Node shown on Exhibit C-2 serves as a commercial center and
transportation network connection at the intersection of the Village Main Street and the
collector street identified as Street "B" on Exhibit C-2. This activity node is also referred
to as the "Village Center Core." Street "B" will intersect the Village Main Street at the
Village Center Core and connect Globe Road to Brier Creek Parkway. The collector
street cross-section will include a right-of-way up to one hundred (100) feet in width
with two (2) travel lanes and a median reserved for future transit use.
IV. BRIER CREEK VILLAGE CENTER MASTER PLAN
Brier Creek Village Center will be developed as described herein and in the Land
Use Summary of Exhibit C-2 (the "Land Use Summary"). Subject to Article VIII, tract
sizes, the square footage of land uses, and the number of dwelling units shown in the
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0006515.00063 L18: Raleigh
Land Use Summary are maximum intensities for the development of the tracts shown
on Exhibit C-2. In order to fully achieve the purposes of the Planned Development
District and the Small Area Plan, the Land Use Summary of Exhibit C-2 contemplates
retail uses within Brier Creek Village Center that exceed ten percent (10%) of the gross
land area of the Property. However, retail uses within Brier Creek Village Center shall
not exceed twenty-five percent (25%) of the gross land area of the Property. When a
building upon the Property incorporates non-retail and retail uses and the non-retail
uses comprise more than fifty (50) percent of the building's leased space, then the retail
uses in the building will not be included in calculating the area of the Property devoted
to commercial (retail) land uses. The vision proposed by the Small Area Plan for the
Property is the integration of a variety of uses at higher development intensities, which
will promote pedestrian interconnectivity between the different uses within and
surrounding the Property, as well as usage of public transit between the Property and
the community at large. Central to this concept is the development of an active,
pedestrian-oriented Village Main Street (Street A) which will connect the three (3)
activity nodes called for in the Small Area Plan. The Village Main Street (Street A) and
activity nodes will create a vibrant center of activity for the Property and the community
in a pedestrian-oriented environment by incorporating a high intensity of retail,
residential and office uses in a manner that fosters a main street walking experience.
Although residential and office uses on the Property will provide excellent pedestrian
opportunities for individuals that both live and work on the Property, allowing retail
uses to the extent shown in the Land Use Summary of Exhibit C-2 will further encourage
pedestrian travel by such individuals as well as the community at large by providing
restaurant, shopping and entertainment options within and surrounding the three (3)
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' identified activity nodes. Providing the level of retail uses provided in Exhibit C-2 is
therefore vitally important to providing a fully-integrated multiple use development on
' the Property. The extensive existing transportation infrastructure bordering the
Property consisting of I-540, Aviation Parkway, Brier Creek Parkway and Lumley Road
provides excellent access to the Property, and the location of the Property near the
' existing Brier Creek development and Raleigh Durham Airport further supports this
level of usage. By capitalizing upon these factors while preserving natural features of
the Property as provided in this Master Plan, and by providing a mixture of uses in a
setting utilizing a street-oriented design, Brier Creek Village Center will become a
' unique center of activity which provides its residents with the opportunity to live, work
and play in a single location.
' The development criteria of the tracts shown on Exhibit C-2 are as follows:
1 A. Tract A.
1. Uses. Tract A, which consists of 30.18 acres, shall be
' developed for residential (most likely group housing), office, and/or
t commercial uses. As shown in the Land Use Summary provided in
' Exhibit C-2, the maximum square footage for all office uses for Tract A
shall be 250,000 square feet, and the maximum square footage for all
commercial uses for Tract A shall be 300,000 square feet. The maximum
' residential density for Tract A shall be forty (40) dwelling units per acre.
' Within Tract A, office and/or commercial and residential uses may be
combined in the same building structure to provide live/work
' opportunities envisioned by the Small Area Plan.
' 2/1/053:28 PM 5 124761.16
0006515.00063 LID: Raleigh
e
2. Building Height. Maximum building height for all uses shall
be seventy-five (75) feet. However, a building may exceed seventy-five
(75) feet if one additional foot of building setback is provided for each foot
of height in excess of seventy-five (75) feet. Notwithstanding the
foregoing, buildings within one hundred (100) feet of Street "C" may not
exceed fifty (50) feet in height.
3. Building Setbacks and Streetyards. Setbacks and streetyards shall
be as provided in the Setbacks Table of Exhibit C-4 (the "Streetyards and
Setbacks Table").
B
1. Uses. Tract B, which consists of 51.16 acres, shall be
developed for residential (most likely medium density single-family or
group housing), office, and/or commercial uses. As shown in the Land
Use Summary provided in Exhibit C-2, the maximum square footage for
all office uses for Tract B shall be 50,000 square feet, and the maximum
square footage for all commercial uses for Tract B shall be 50,000 square
feet. The maximum residential density for Tract B shall be twenty (20)
dwelling units per acre. Within Tract B, office and/or commercial and
residential uses may be combined in the same building structure to
provide live/work opportunities envisioned by the Small Area Plan.
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2. Building Height. Maximum building height for all uses shall
be seventy-five (75) feet. However, a building may exceed seventy-five
(75) feet if one additional foot of building setback is provided for each foot
of height in excess of seventy-five (75) feet.
3. Building Setbacks and Streetyards. Setbacks and streetyards
shall be as provided in the Setbacks Table of Exhibit C-4 (the "Streetyards
and Setbacks Table").
C. Tract C.
1. Uses. Tract C, which consists of 21.42 acres, shall be
developed for residential (most likely group housing), office, and/or
commercial uses. As shown in the Land Use Summary provided in Exhibit
C-2, the maximum square footage for all office uses for Tract C shall be
50,000 square feet, and the maximum square footage for all commercial
uses for Tract C shall be 200,000 square feet. The maximum residential
density for Tract C shall be forty (40) dwelling units per acre. Within
Tract C, office and/or commercial and residential uses may be combined
in the same building structure to provide live/work opportunities
envisioned by the Small Area Plan.
2. Building Height. Maximum building height for all uses shall
be seventy-five (75) feet. However, a building may exceed seventy-five
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(75) feet if one additional foot of building setback is provided for each foot
of height in excess of seventy-five (75) feet.
3. Building Setbacks and Streetyards. Setbacks and streetyards
shall be as provided in the Setbacks Table of Exhibit C-4 (the "Streetyards
and Setbacks Table").
D. Tract D.
1. Uses. Tract D, which consists of 28.07 acres, shall be
developed for residential (most likely group housing), office, and/or
commercial uses. As shown in the Land Use Summary provided in
Exhibit C-2, the maximum square footage for all office uses for Tract D
shall be 250,000 square feet, and the maximum square footage for all
commercial uses for Tract D shall be 200,000 square feet. The maximum
residential density for Tract D shall be forty (40) dwelling units per acre.
Within Tract D, office and/or commercial and residential uses may be
combined in the same building structure to provide live/ work
opportunities envisioned by the Small Area Plan.
2. Building Height. Maximum building height for all uses shall
be seventy-five (75) feet. However, a building may exceed seventy-five
(75) feet if one additional foot of building setback is provided for each foot
of height in excess of seventy-five (75) feet.
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3. Building Setbacks and Streetyards. Setbacks and streetyards
shall be as provided in the Setbacks Table of Exhibit C-4 (the "Streetyards
and Setbacks Table").
E. Tract E.
1. Uses. Tract E, which consists of 42.08 acres, shall be
developed for residential (most likely group housing), office, and/or
commercial uses. As shown in the Land Use Summary provided in Exhibit
C-2, the maximum square footage for all office uses for Tract E shall be
200,000 square feet, and the maximum square footage for all commercial
uses for Tract E shall be 100,000 square feet. The maximum residential
density for Tract E shall be forty (40) dwelling units per acre. Within Tract
E, office and/or commercial and residential uses may be combined in the
same building structure to provide live/work opportunities envisioned by
the Small Area Plan.
2. Building Height. Maximum building height for all uses shall
be seventy-five (75) feet. However, a building may exceed seventy-five
(75) feet if one additional foot of building setback is provided for each foot
of height in excess of seventy-five (75) feet.
3. Building Setbacks and Stree , ards. Setbacks and streetyards
shall be as provided in the Setbacks Table of Exhibit C-4 (the "Streetyards and
Setbacks Table").
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' V. STANDARDS AND CRITERIA APPLICABLE TO BRIER CREEK VILLAGE
CENTER
The following standards and criteria shall be applicable to all development
' within Brier Creek Village Center.
A. Interconnectivity
e The Village Main Street conceptually depicted on Exhibit C-2 traversing
Brier Creek Village Center shall be open to public use and operating from Globe Road to
the eastern boundary of the Property before certificates of occupancy are issued with
respect to more than two hundred (200) dwelling units or more than fifty thousand
(50,000) square feet floor area gross of non-residential buildings within the Property.
Specific street locations and standards shall be determined as site plans are approved for
development and those streets shall be constructed upon development.
B. Pedestrian Orientation
As shown on Exhibit C-3, a minimum twelve-foot (12') public promenade
zone area containing sidewalks a minimum of six (6) feet in width and a utility/ planting
strip at least six (6) feet in width shall be constructed along both sides of Street "A" and
Street "B". An encroachment agreement shall be necessary for landscaping, any special
pavers/walks and decorative pavement within the public right-of-way. All other public
and private streets within Brier Creek Village Center shall have sidewalks of at least five
(5) feet in width, except as shown on Exhibit C-3 for the Internal Public Access Drive
located on Tract B. Sidewalks adjacent to commercial (retail) land uses shall be a
minimum of six (6) feet in width. High visibility pedestrian crosswalks will be located at
public street intersections as well as at private street connections with public streets.
These crosswalks will be designated with broad pavement marking and striping, or a
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' decorative pavement section of contrasting color, such as brick pavers. The site plan for
each building within Brier Creek Village Center will provide for marked and paved
' pedestrian access from the building to a nearby street sidewalk or sidewalks. In
' addition, pedestrian access (at locations and of a design approved at the times of site
plan approval) shall be provided to the Park Tract or the existing City of Raleigh
Greenway shown on Exhibit C-4. With respect to both sides of Street A and Street B,
' sidewalk connections perpendicular to the street and providing internal access to the
adjoining Tract shall be provided at locations an average of no more than six hundred
(600) feet apart. Also, roads bisecting a development tract shall have a sidewalk along at
least one side.
C. Public Transit
' A transit loop connecting the various mixed-use centers of the Triangle
' with two TTA regional rail stops and the RDU Airport is projected for the region. A
segment of this transit loop is proposed to pass through the Brier Creek Village Center.
' No fewer than three (3) transit stops shall be dedicated within the Property in locations
' selected in consultation with the Raleigh Department of Transportation at the time of
site plan approval (but no less frequently than every 2,000 linear feet along the Village
Main Street). These transit stops shall be a minimum of fifteen (15) feet in width and
twenty (20) feet in length. In addition, upon subdivision or site plan approval,
whichever shall first occur, a transit easement a minimum of thirty-five feet (35') in
' width shall be dedicated on the south side of Brier Creek Parkway between Street "B"
and Street "C".
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D. Open Space; Environmental and Aesthetic Concerns
At least ten percent (10%) of the Property net of public rights-of way shall
remain natural open space as shown on Exhibit C-4. Section 10-2057 of the Code
provides that fifteen percent (15%) of the Property should be set aside for open space,
but authorizes the City Council to vary that standard where circumstances so merit. The
fifteen percent (15%) threshold is met in this case by taking into consideration that the
developer of the Property conveyed the Park/School Tract to Wake County at a price
below market value. A public park of approximately ten (10) acres in size is to be
located on this tract which will be used by residents of the Brier Creek Village Center.
Additionally, within the nineteen hundred (1,900) acre Brier Creek community, there
exists over seventy (70) acres of existing and planned greenway that will be connected to
the greenway within the Brier Creek Village Center. Also, the vast, undisturbed open
spaces of Umstead State Park and Lake Crabtree Park are within three (3) miles of the
Property, which has pedestrian access to both parks via a Greenway Corridor Connector
designated by the City's Comprehensive Plan. Natural open space within Brier Creek
Village Center (except the pond between Tracts D and E) shall be regulated as a natural
protective yard under the City Code. Dead, diseased, and unsafe trees and limbs, as
well as underbrush, may be removed from natural open space within Brier Creek
Village Center.
Included within the open space of the Brier Creek Village Center is an existing
pond between Tracts D and E and the area around such pond as shown in Exhibit C-4.
Upon the development of adjacent portions of the Village Center, a mulch pedestrian
path shall be constructed around the pond.
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' Permanently protected undisturbed open space may be aggregated and
pro-rated based on acreage to the various tracts and all such allocations will appear on
all final subdivision plats..
E. Vehicular Parkin
Off-street parking shall be provided in accordance with provisions of the
' City Code. However, where a site plan is submitted providing multiple land uses, Staff
' may approve alternate parking standards. In no event shall less than three (3) spaces be
provided for each 1,000 square feet for commercial and/or office uses, no fewer than one
(1) space shall be provided for one- (1-) bedroom residential units, one and one-half (11/2)
' spaces for each two- (2-) bedroom residential unit, and two (2) spaces for each three- (3-)
bedroom residential unit. Parking shall not be allowed along Street A between buildings
facing the street and the street. Along both sides of Street B, one bay of parking shall be
' allowed between buildings facing the street and the street.
F. Unity of Development
All development within the Brier Creek Village Center will be in
accordance with the "Brier Creek Community Guidelines," a copy of which is submitted
with this Master Plan. These guidelines establish design standards for the entire 1800-
acre Brier Creek development. The Planning Director or his designee will be notified
from time to time of any revision to the Guidelines. Where required by the City Code,
Unity of Development Criteria shall be established for individual commercial
developments within the Brier Creek Village Center on a case by case basis.
' G. Transitional Protective Yards
Transitional protective yards will be provided where required by the
City's Landscape Ordinance on the boundaries of the Property.
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1 H. Landscape Maintenance and Location
Prior to any development, a property owners' association or associations
will be established to maintain common areas, open space, encroachments, stormwater
control measures and all planting islands located within public street rights-of-way.
Streetyard plantings along any zero-setback street may be installed in the right-of-way.
Encroachment agreements must be approved by the City Council prior to approval of
' any such planting plans.
I. Stormwater Management
' A preliminary Stormwater Management Plan has been submitted to
present a comprehensive effort to minimize impacts to wetlands, streams and Neuse
River Buffer Areas and to address stormwater runoff quantity and quality upon the
Property. All development within Brier Creek Village Center shall comply with the
Neuse River Basin Nutrient Management Strategy and the City's stormwater
requirements. No stormwater devices shall be located within the natural protective
yards, riparian buffers or streetyards within the Property.
'' Stormwater management infrastructure may change in size, shape and
location at the time of submission of construction drawings. Stormwater collection
systems in public rights-of-way shall conform to the City's standards and specifications.
Collection systems on private property may include storage devices or other alternative
design concepts.
J. Annexation
Voluntary annexation petitions will be submitted as development occurs
within Brier Creek Village Center.
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K. Utilities
As demonstrated by the Utilities Plan submitted herewith, adequate
public utilities exist or will exist upon development to serve Brier Creek Village Center.
L. Development Pattern and Design
Attached hereto as Exhibit A is a table which presents design guidelines
applicable to the respective development tracts of Brier Creek Village Center.
References are included within the table which refer to applicable provisions of the
Urban Design Guidelines.
In view of the village center nature of the development of the property,
no single commercial business establishment upon the Property shall exceed forty
thousand (40,000) square feet of leaseable area. It is provided, however, that a grocery
' store or a cinema may consist of up to sixty thousand (60,000) square feet of leaseable
' area.
M. Proximity to RDU International Airport
Attached as Exhibit C-8 to this Master Plan is a contour map dated
' August 5, 2004 prepared on behalf of the RDU Airport Authority and depicting
projected noise contours associated with the operation of a planned third runway to
' serve the Airport. As shown on that map, a portion of the Property (the "Affected
Portion") is within the DNL 55 dbn noise contour line. Within sixty (60) days following
the approval of this Master Plan by the Raleigh City Council, a declaration shall be
' recorded in the Wake County Registry which shall appear in the chain of title of all lots
within the Affected Portion of the Property providing notice to subsequent purchasers
that the respective lots are within the Airport's projected 55 dbn noise contour line.
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N. Tree Preservation
The standards of the Tree Preservation Ordinance (Ordinance Number
(2005) 762 TC 264 TC-7-04) shall be applied to the Property as a whole rather than on a
Tract by Tract or lot by lot basis. In this regard, the fifty (50) foot wide yard along Brier
Creek Parkway may be shifted to other areas of the Property and the perimeter tree
preservation requirements for Tract B adjacent to the Park Tract and for Tract A adjacent
to the Park Tract may be shifted to other areas of the Property. The perimeter tree
preservation requirement for each Tract may be shifted to the interior of the Tract. All
shifting of tree preservation areas will be shown on recorded subdivision plats..
Perimeter tree preservation areas shall be measured from the edge of the public right-of-
way or property line.
0. Minimum Lot Size.
The minimum net lot area for any dwelling unit or equivalent dwelling
unit upon the Property shall be the lowest square foot number of the following numbers:
(i) 5,000 square feet; or (ii) the lowest square foot number between the range of 1,500
square feet and 4,999 square feet if and when authorized by the City Code for a period
of two (2) years from the date this Master Plan is approved by the City Council.
VI. ALTERNATIVE MEANS OF COMPLIANCE WITH RESPECT TO CODE
SECTION 10-2057
The elements of this Master Plan proposed as alternative means of
compliance with respect to the provisions of Code Section 10-2057, which are otherwise
applicable to the Planned Development Overlay District, are as follows:
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e (1) The maximum square footage of commercial (retail)
development within each of the Tracts comprising Brier Creek Village Center is
set forth in the Land use Summary attached hereto. The total commercial (retail)
development within Brier Creek Village Center, however, shall not exceed
twenty-five percent (25%) of the area of the Property. This exceeds the ten
percent (10%) envisioned by Section 10-2057. Section 10-2057, however,
authorizes the City Council to vary the ten percent (10%) standard where
circumstances are present that further the goals of the Planned Development
Overlay District. Those goals include the promotion of public transit,
enhancement of the economic base, the protection of road corridors from strip
development, and the provision of community-wide public services and
amenities, all of which are served by the elements of this Master Plan. It is
submitted that the City Council envisioned the extent of retail and other land
uses proposed by this plan when, during the 1980's, it authorized the significant
expenditure of public funds required to extend public utilities to this area. The
location of the Property within a Regional Intensity Area, its proximity to
Raleigh/Durham International Airport and three Primary Arterials (I-40, I-540,
and U.S. 70), and the provisions of the Small Area Plan also justify the extent of
commercial (retail) land uses proposed by this Master Plan. When a building
upon the Property incorporates non-retail and retail uses and the non-retail uses
comprise more than fifty (50) percent of the building's leased space, then the
retail uses in the building will not be included in calculating the area of the
Property devoted to commercial (retail) land uses.
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(2) Setbacks and streetyards upon the Property will be
governed by Exhibit C-4 of this Master Plan, rather than by Code provisions
' generally applicable to the Thoroughfare District.
(3) Under this Master Plan the height of buildings upon the
Property is limited to seventy-five (75) feet with one additional foot of building
' setback provided for each foot of height in excess of seventy-five (75) feet.
' Buildings within one hundred (100) feet of Street C will not exceed fifty (50) feet
in height. This Master Plan thus modifies height limits otherwise established by
Code Section 10-2045(d)(3) for the Thoroughfare District (fifty (50) feet with two
(2) additional feet of setback required for each foot of height in excess of fifty (50)
feet).
(4) This Master Plan proposes that ten percent (10%) of the
area of the Property be devoted to open space rather than fifteen percent (15%) as
provided in Section 10-2057. It is submitted that this reduction is justified by
these factors: (a) adjacent to the Property -and formerly a part of the Property -
is the school/park site, which comprises twenty (20) acres; (b) the Property is
part of the overall Brier Creek development, which includes eighty (80) acres of
' existing and planned greenways; the Property is directly tied to this greenway
' system by an existing greenway which abuts Tract C of the Property; the
sidewalks of the Property's Village Main Street (Street "A") will provide direct
' pedestrian access to this greenway; and (c) the Small Area Plan contemplates that
' the Property will develop at significant densities in order to support mass transit
and further the plans urban goals.
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(5) The Master Plan proposes that off-street parking shall be
provided in accordance with provisions of the City Code. However, where a site
' plan is submitted providing multiple land uses, Staff may approve alternate
parking standards. In no event shall less than three (3) spaces be provided for
each 1,000 square feet for commercial and/or office uses, no fewer than one (1)
space shall be provided for one- (1-) bedroom residential units, one and one-half
' (1 Y2) spaces for each two- (2-) bedroom residential unit, and two (2) spaces for
each three- (3-) bedroom residential unit.
(6) As provided in this Master Plan, minimum building and
parking setbacks may vary from Code requirements. Please refer to Sheets C-3
and C-4 of the Exhibits for alternate means of compliance
VII. PHASING
Brier Creek Village Center will be developed in phases primarily
determined by market conditions, economic considerations, and matters determined as
field engineering and surveying progresses. Any tract within Brier Creek Village Center
may be developed at any time provided all necessary infrastructure is in place to serve
such development. For purposes of Section 10-2057(f)(4)b.4, the "constructed"
requirement shall be satisfied with respect to acreage within Brier Creek Village Center
upon the issuance of a building permit pursuant to an approved site plan.
VIII. AMENDMENTS AND APPROVAL
Only Brier Creek Associates Limited Partnership and the Brier Creek
Village Center Property Owners' Association shall have the right to amend this Master
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1 Plan and the exhibits hereto. Both parties must join in all amendments to this Master
Plan. But Brier Creek Associates Limited Partnership shall not be required to loin in any
1 amendment made after it no longer owns any property in Brier Creek Village Center.
1 A. Administrative Changes
1. Within the Property, City Administration will approve site plans
1 as development occurs and, if required, unity of development and unified
1 landscape plans.
2. Within the Property, City Administration may approve minor
1 variations in the density of residential uses, provided that the overall maximum
1 residential density of Brier Creek Village Center is not increased by more than
ten percent (10%), and will approve all preliminary subdivision plans. The
1 maximum density of residential development upon the Property shall not exceed
1 forty (40) units per acre.
1 3. City Administration may approve changes in public street
locations, driveway access points, and minor changes in street or sidewalk
1 construction standards that do not affect the traffic-carrying capacity of the
1 respective streets or sidewalks.
4. City Administration shall approve any increase not exceeding ten
1 percent (10%) in the total of maximum intensities for a respective land use.
1 B. Planning Commission Changes
1 Upon approval by the owner, the Planning Commission shall resolve any
question of interpretation of this Master Plan and its exhibits that may arise in
1 the administrative approval of any site plan upon the Property, and that is not
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1
resolved between City Administration and the owner. Either the Planning
Director or the applicant may appeal the judgment of the Planning Commission
to the City Council.
C. City Council Changes
1. The City Council, after a recommendation of the Planning
Commission, shall approve any change in this Master Plan or its exhibits that
will create an expansion with respect to a tract or outparcel shown on Exhibit C-2
which is greater than ten per cent (10%), but not in excess of twenty percent
(20%), of the approved acreage or square footage applicable to that tract or
outparcel. In such case, the maximum densities for land uses shall be pro-rated
based upon changes in the sizes of the Tracts.
2. The City Council, after a recommendation of the Planning
Commission, may increase residential densities and non-residential intensities by
an additional ten percent (10%), but to a level not greater than twenty percent
(20%) of the stated amount.
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