20140855 Ver 1_Riparian Buffer Authorization_20140808

MCADAMS
LETTER OF TRANSMITTAL
To Ms Karen Higgins Date August 6, 2014
NC Division of Water Resources
_401 & Buffer Permitting Unit
1617 Mail Service Center REGULAR MAIL
Raleigh,-North Carolina 27699
Re WHSI Building Expansion Job No EYP -14000
I am sending you the following item(s)
COPIES
DATE
NO
DESCRIPTION
3
Neuse Buffer Authorization Application Package
These are transmitted as checked below
As requested
❑ For approval
❑ For review and comment
Remarks
❑ For your use
Copy to Signed — C�
George Buchholz, PWS/,REM
Wetlands Scientist
Raleigh- Durham Charlotte
2905 Meridian Parkway 11301 Carmel Commons Blvd , Suite 111
Durham, North Carolina 27713 Charlotte, North Carolina
(919) 361 -5000 (704) 527 -0800
Designing Tomorrow's Infrastructure & Communities
McAdamsCoxom

J McADAMS
August 6, 2014
Ms Karen Higgins
NC Division of Water Resources
401 & Buffer Permitting Unit
1617 Mail Service Center
Raleigh, North Carolina 27699 -1650
Re: Neuse Buffer Authorization
WHSI Building Expansion
Raleigh, North Carolina
EYP -14000
Dear Ms Higgins
On behalf of Wake Health Services Inc, we are applying for a Neuse River
Riparian Buffer Authorization for permanent impacts to Zone 1 and Zone 2 ,of
the Neuse Buffer associated with installation of a new sewer line for a two -
story building containing medical office and clinical space located at 1001
Rock Quarry Road, Raleigh, North Carolina The subject property is 7 53
acres located off of Rock Quarry Road and Raleigh Boulevard in Wake
County The subject property contains a tributary to Walnut Creek within the
Neuse River basin The following items are included in this Neuse Buffer
Authorization application package
• Signed Agent Authorization
• Fig 1 - USGS Quad — Raleigh West
• Fig, 2 - Wake County Soil Survey (Sheet 59)
• Fig 3 1 - Existing Conditions Map
• Fig 3 2 - Existing Conditions Map with Aerial
• Fig 4 - Overall Impact Map
The John R McAdams
• Fig 4 1 — Proposed Impact Map (West Side), 1" = 50'
Company, Inc
• Fig 4 2 — Proposed Impact Map (East Side), I" = 50'
• Inset 1 — Plan View
Raleigh / Durham „NC
s Stormwater Impact Analysis summary
2905 Meridian Parkway
Durham, North Carolina 27713
(919) 361 -5000
STREAM MAPPING: All stream location work was conducted by others,
and McAdams does not have the previous Neuse River Riparian Stream
Charlotte, NC
Buffer Determinations, or USACE JD maps The stream mapping and existing
11301 Carmel Commons Blvd,
conditions are based off of previously approved site plans
Suite 111
Charlotte North Carolina 28226
(704) 527 -0800
McAdamsCo cam
Designing Tomorrow's Infrastructure & Communities

Ms. Karen Higgins
WHSI Building Expansion
August 6, 2014
Page 2 of 4
The subject property contains an unnamed tributary to Walnut Creek; Which
discharges into the Neuse River (HUC 03020201) The subject property
contains approximately 589 linear feet of a perennial stream located within the
southeastern section of the subject property The stream feature is subject to
the Neuse River Buffer Rules The stream feature is depicted on the USGS
quad (Fig. 1`) map and on the Wake County Soils Survey (Fig 2). There are no
wetlands located within the subject property.
PROJECT LOCATION/HABITAT: Approximately 60 percent �of the
Subject property can be characterized as undeveloped forested land, while the
remaining 35 percent is currently developed with an approximately 32,000 s.f
two -story building containing medical office and climc space known as the
Rock Quarry Road Family Medicine facility, while 5 percent can be
characterized as maintained land The undeveloped forested land can be
generally characterized as a Dry Mesic Oak - Hickory Forest according the NC
Natural Heritage Program classification system Maintained land is associated
with existing sewer line easements located parallel to an unnamed tributary to
Walnut Creek 'The riparian buffer is mostly forested and consists of mainly
loblolly pine (Pinus taeda) and oak species (Quercus sp ), in addition to red
maple (Acer rubrum) and tulip poplar (Liriodendron tulipifera) with an
understory of Chinese privet (Ligustrum sinense) and greenbriar (Smilax
rotundifolia).
The subject property contains an unnamed tributary to Walnut Creek, which
discharges into the Neuse River (HUC 03020201) Walnut Creek and
associated tributaries is designated Class C and NSW. The subject property
contains approximately 589 linear feet of the - perennial stream feature located
within the southeastern section of the subject property The stream feature is
subject to the Neuse River Buffer Rules The stream feature is depicted on the
USGS quad (Fig. 1) map and on the Wake County Soils Survey (Fig. 2)
There are no wetlands located within the subject property.
Land use within the vicinity of the project is a mix of retail /commercial,
multi - family, and industrial - office, and with little ,to no natural forested areas
EYP =14000

Ms. Karen Higgins
WHSI Building Expansion
August 6, 2014
Page 3 of 4
outside of the project area Meadow Wood Blvd is stubbed to the
northwestern property boundary There is also a City of Raleigh sanitary
sewer easement running along the eastern boundary of the property
PROPOSED PROJECTAMPACTS: The proposed involves the expansion
of an existing two -story building containing medical office and clinic space
which is a permitted use within the current CUD O -I zoning As part of the
expansion, connection to an existing sanitary sewer line is required.
Extension of the proposed sanitary sewer line is intended to connect to an
existing sewer line man-hole located parallel to an unnamed tributary to
Walnut Creek that, is already located within Zone 1 of the Neuse River
Buffers The proposed sanitary sewer line enters the Neuse River Buffers at
an 80° angle in order to connect to the existing sewer line man-hole Typical
construction equipment will be used, such as a long -arm track -hoe; front end
loader, and bush hog for the initial clearing
TOTAL BUFFER IMPACTS:
Buffer Impact Type
Zone 1 impact
Zone 2 impact
s uare eet)
(square feet)
Sewer installation
203
203
erm
TOTAL
203
203
AVOIDANCE and MINIIV MATION: Unavoidable impacts cannot be
achieved in order to connect to an existing sewer line which is currently
located within the Neuse River Buffers. Impacts to jurisdictional streams and,
wetlands have been completely avoided, while impacts to stream buffers have
been minimized to the maximum extent practicable Minimization efforts have
occurred in the form of connecting to the nearest man-hole within the existing
easement and aligning the proposed sanitary sewer line easement at an 806
angle entering the Neuse River Buffer.
DIFFUSE FLOW: There are no new outfalls ,and all drainage is directed to
existing stormwater management facility, therefore, no new level spreaders
are'required.
EYM 4000

Ms Karen Higgins
WHSI Building Expansion
August 6, 2014
Page 4 of 4
STORMWATER MANAGEMENT: Per City of Raleigh stormwater
management regulations, peak flow rate detention is required for proposed
increases in the 2- and 10 -year storm events. Even though the site in the post -
'development condition proposes an increase in impervious area (0 82 -acre
increase), imperviousness, and the CN value, peak runoff rates were not
generated because detention at this site is not recommended. Geographically,
this site is located approximately 500 -ft upstream of the backwater floodplain
for Walnut Creek In addition, there is a buffered stream that runs through the
site that drains nearly 50 acres (estimated) of downtown Raleigh Given this,
detention at this site is not recommended since providing detention would, at
best, provide no benefit and, at worst, extend the peak for the stream that runs
through the property (and, potentially, affect adversely the functioning of the
culvert under Raleigh Boulevard South) and, potentially, extend the peak for
Walnut Creek.
MITIGATION: All buffer impacts are deemed "Allowable" under the Neuse
Raver Riparian Buffer Rules — Table of Uses Therefore, no mitigation is
proposed
Consideration of this project is greatly appreciated If you should have any
questions or require additional information, please do not hesitate to contact
me, at (919) 287 -0890
Sincerely,
The John R. McAdams Company, Inc
✓ l
George Buchholz REM, PWS
Environmental Consultant
Project Manager
Enclosures
EYP -14000

DWR State of North Carolina
2 0 8 5 5 Department of Environment and Natural Resources
Dlvlslon of Water Resources Division of Water Resources
15A NCAC 02B.0233 (8)(b),.0243 (8)(b),.0250 (11)(b),.0259 (8)(b),.0267 (11)(c),.0607 (e)(2) - Buffer Authorization
FORM: BA 10 -2013
Riparian Buffer Authorization Form
A.
Applicant Information
1.
Project Information
1a.
Name of project.
WHSI Building Expansion
1 b.
County:
Wake
1c.
Nearest municipality:
Raleigh
1 d.
Subdivision name.
1e.
Is the project located in any of North Carolina's
twenty coastal counties. If yes, answer if below.
❑ Yes
® No
1f.
Is the project located within a NC Division of Coastal
Management Area of Environmental Concern (AEC)?
❑ Yes
® No
2.
Owner Information
2a.
Name on Recorded Deed:
Wake Health Services Inc.
2b.
Deed Book and Page No.
DB: 007748, PG: 00459
2c. Map Book and Page No.
(include a copy of the recorded
map that indicates when the lot
was created):
Book of Maps 1996; Page 239
2d.
Responsible Party
(for Corporations):
Wake Health Services Inc. (attn.: Penella M. Washington)
2e.
Street address:
2620 New Bern Avenue
2f.
City, state, zip:
Raleigh, NC, 27610 -3825
2g.
Telephone no.:
(919)250 -2921
2h.
Fax no.:
2i.
Email address:
3.
Applicant Information (if different from owner) nk
3a.
Applicant is:
❑ Agent ❑ Other, specify:
3b.
Name:
3c.
Business name
(if applicable):
AU:Gi,
3d.
Street address:
QUALITY
3e.
City, state, zip:
rarlcn
3f.
Telephone no.:
3g.
Fax no.:
3h.
Email address:
4.
Agent/Consultant Information (if applicable)
4a.
Name:
George Buchholz, Environmental Consultant/Project Manager
4b.
Business name
(if applicable):
The John R. McAdams Company, Inc.
4c.
Street address:
2905 Meridian Parkway
4d.
City, state, zip:
Durham, NC, 27713
4e.
Telephone no.:
(919)287 -0890
4f.
Fax no.:
(919)361 -2269
4g.
Email address:
[e-mail]
FORM: BA 10 -2013 Page 1 of 7

B.
Project Information and Prior Project History
1.
Property Identification
1a
Property identification no (tax PIN or °parcel ID)
1713440583
lb
Site coordinates (in decimal degrees)
Latitude 35 7675
Longitude -78 6156
_1c
Property size
7 53 acres
2.
Surface Waters
2a
Name of nearest body of water to proposed, project
Walnut Creek
2b
Water Quality Classification of nearest receiving water
C,NSW
2c
River basin
Neuse 0302020111
3.
Project Description
3a
Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application
Approximately 60 percent of the subject property can be characterized as undeveloped forested land, while the
remaining 35 percent is currently developed with an approximately 32,000 9 f two -story building containing
medical office and clinic space known as the Rock Quarry Road Family Medicine facility, while 5 percent can be
characterized as maintained land The undeveloped forested land can be generally characterized as a Dry Mesic
Oak - Hickory Forest according the NC Natural Heritage Program classification system Maintained land is
associated with existing sewer line easements located parallel to an, unnamed tributary to Walnut Creek
3b
Attach an 8' /z x 11 excerpt from the most recent, version of the USGS topographic map indicating the location of
the site, See attached Figure 1
3c
Attach an 8' /Z x 11 excerpt from the most recent'version of the published County NRCS Sod Survey Map
depicting the project site See attached Figure 2
3d
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property
589 LF
3e
Explain the purpose of the proposed project
A sanitary sewer line is proposed to connect °to an existing sewer line man -hole located parallel to an unnamed
tributary to Walnut Creek As a result of connecting the sanitary sewer line, Neuse River Buffer impacts are
proposed
3f
Describe the overall project m detail, including the type of egwpment,to be used
The,proposed involves the expansion of an existing two -story building containing medical office and clinic space
which is a permitted' use within the current CUD 0-1 zoning As part of the expansion, connection to an existing
sanitary sewer line is required Extension of,the proposed sanitary sewer line is intended to connect to an
existing sewer line man -hole located parallel to an unnamed tributary to Walnut Creek that is already located
within Zone 1, of the Neuse River Buffers The proposed sanitary sewer line enters the Neuse River Buffers at an
80° angle in order to connect to the existing sewer line man -hole Typical construction equipment will be used,
such as a long -arm track -hoe, front end loader, and bush hog for the initial clearing
4.
Jurisdictional Determinations
4a
Have jurisdictional wetland or stream determinations by the
❑ Yes ® No ❑ Unknown
Corps or State3been requested or obtained for this property/
Comments
project,(including all prior phases) in the past?
4b
If yes, who delineated the jurisdictional areas
Agency/ Consultant Company
Name (if known)
Other
4c
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation
5
Project History
5a
Have permits or certifications been requested or obtained for this
El Yes ® No El Unknown
project (including all pnor phases) in the past
5b
If yes, explain,and detad„according'to "help file" instructions
FORM BA 10 -2013 Page 2 of 7

B. Project Information and Prior Project History
6 Futurea Project Plans
6a Is this a phased project? ❑ Yes ® No
6b If yes, explain
FORM SSGP3080 8 -13 Page 3 of 7

C. Proposed Impacts Inventory
1 Buffer Impacts
1a ,Project is in which protected basin?
® Neuse ❑ Tar - Pamlico ❑ Catawba
❑ Randleman El Jordan Goose Creek
1 b 'Individually list all buffer'impacts,below- If any impacts require mitigation, then you MUST fill out Section D of`thls
form,
Buffer impact
number—
Permanent (R)
or Temporary
Reason for
impact
Type of impact
(exempt,allowable,
allowable w/ mitigation)
Stream name
Buffer
mitigation
required?
Zone 1
impact
(sq ft)
Zone 2
impact
(sq ft)
61 ®P [IT
Sanitary Sewer
Connection
allowable
Unnamed
Tributary to
Walnut Creek
❑ Yes ® No
203
203
B2 ❑ P ❑ T
❑ Yes ❑ No
B3 ❑ P ❑ T
_
❑ Yes ❑ No
B4 ❑ P ❑ T
❑ Yes ❑ No
65 ❑ P ❑ T
❑ Yes ❑ No
B6 ❑ P ❑ T
❑ Yes ❑ No
_
Total
buffer impacts
203
203
1c Comments
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project
Unavoidable impacts cannot be achieved in order to connect to an existing sewer line which is currently located
Within the Neuse River Buffers Impacts to jurisdictional streams and wetlands have been completely avoided,
while impacts to stream buffers have been minimized to the maximum extent practicable Minimization efforts
have occurred in the form of connecting to the nearest man -hole within the existing easement and aligning the
proposed sanitary sewer line easement at an 80° angle entering the Neuse River Buffer
f
1 b Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques
Proper sedimentation and erosion control methods will be utilized during all phases of construction and
installation All work will take place during dry conditions and can be facilitated from high, non - jurisdictional,
stable ground The contractor shall install silt fence, inlet protection, sediment traps, diversion ditches, tree
protection, clearing only as necessary to install devices All erosion and sediment control measures will be
checked for stability and operation following every runoff producing rainfall, but in no case less than once every
week Any needed repairs will be made immediately to maintain all measures designed An erosion control
inspections report is required and will be kept by the owner's representative Temporary seeding and permanent
seeding plans are included to restore impacted areas The project will meet all relative requirements of Best
Management Practices and Engineered Stormwater Control Structures as outlined through State and Local
Stormwater Rules
FORM_ BA 10 -2013 Page 4 of 7

C. Impact Justification and Mitigation, continued
2.
Buffer Mitigation
2a
Will the project result in an impact within a protected riparian buffer that requires buffer
mitigation?
❑ Yes ® No
2b
If yes, then identify the square feet of impact to each'zone ofthe riparian ,buffer that requires mitigation and
calculate the amount of mitigation required in the,table below
Zone
Reason for impact
Total impact
(square feet
Multiplier
Required mitigation
(square feet
Zone 1
3 (2 for Catawba)
Zone 2
1'5
Total buffer mitigation
required,
2c
If buffer mitigation is required, is payment to a
mitigation bank or NC EEP proposed?
❑ Yes ❑ No
2d
If yes, attach the acceptance letter from the mitigation bank or NC EEP
2e
Wrio, then discuss what type of mitigation is proposed
2f
Comments
FORM 'SSGP3080 8 -13 Page 5 of 7

E. Diffuse Flow Plan
All buffer Impacts and high ground Impacts require diffuse flow or other form of
❑ Diffuse flow
stormwater treatment Include a plan that fully documents how diffuse flow will be
® Other BMP
maintained If a Level Spreader is proposed, attach a Level Spreader Supplement Form
la
If due to site constraints, a BMP otherthan a level spreader is,proposed, please provide a
❑'Yes ® No
'plan for stormwater treatment as outlined in Chapter 8 of the'NC Stormwater BMP
public (federal /state) land?
'Manual and'attach a BMP Supplement Form
lb
See attached Stormwater Impact Analysis summary There are no new outfalls and all
❑ Yes ❑ No
drainage is directed to existing stormwater management facility, therefore, no new level
environmental document pursuant to the requirements of the National or State (North
spreaders are required Per City of Raleigh stormwater management regulations, peak flow
rate detention is required for proposed increases in the 2- and 10 -year storm events Even
though the site in the post - development condition proposes an increase in impervious area
If you answered "yes" to the above, has the document been finalized by °the State
(0 82 -acre increase), imperviousness, and the CN value, peak runoff rates were not
generated because detention at this site is not recommended Geographically, this site is
located approximately 500 -ft upstream of the backwater floodplain 'for Walnut Creek In
Comments
addition, there is a buffered stream that runs through the site that drains nearly 50 acres
2.
(estimated) of downtown Raleigh Given this, detention at thls�slte is not recommended since
providing detention would, at best, provide no benefit and, at worst, extend the peak for the
Is the site in violation of DWR Wetland Rules (15A NCAC 02H 0500), Isolated Wetland
stream that runs through the property (and, potentially, affect adversely the functioning of the
culvert under.Ralei h Boulevard South ) and, potentially, extend the peak for Walnut Creek
F.
Supplementary Information
1
Environmental Documentation
la
Does the,project involve an expenditure of public (federal /state /local)'funds or the use of
❑'Yes ® No
public (federal /state) land?
lb
If you answered "yes" to the above, does the project require preparation of an
❑ Yes ❑ No
environmental document pursuant to the requirements of the National or State (North
Carolina) Environmental Policy Act (NEPA/SEPA)?
1c
If you answered "yes" to the above, has the document been finalized by °the State
❑ Yes ❑ No
Clearing, House? (If so, attach a copy of the NEPA or,SEPA final approval letter)
Comments
2.
Violations
2a
Is the site in violation of DWR Wetland Rules (15A NCAC 02H 0500), Isolated Wetland
❑ Yes ® No
Rules (15A NCAC 02H 1300), DWR Surface Water or Wetland Standards, or Riparian
Buffer Rules (15A NCAC 02B 0200)?
2b
Is this an after - the -fact permit application?
❑ Yes ® No
2c
If you answered "yes" to one or both of the,above questions, provide an explanation of the violation(s)
ell
Applicant/Agent's Printed Name pplicant/Agent's ignature Da
(Agent's "signature is valid only if an authorization letter from the pphcant is provided)
Send 3 complete sets of this form and accompanying documents to the following
FORM BA 10 -2013 Page 6 of 7

For government transportation projects sent For government transportation projects sent
by, First Class Mail via the US Postal Service by delivery service (UPS, FedEx, etc)
NC DWR, Transportation Permitting Unit OR' NC'DWR, Transportation Permitting Unit
1650 Mad Service Center 512 N Salisbury Street
Raleigh, NC 27699 - 1650 Raleigh, NC 27604
For�allaother projects sent by First Class Mail For all otherprojects,sent by,deliveryAservice
via the US Postal Service (UPS, FedEx, etc)
Karen Higgins OR Karen Higgins
NCDWR — 401 & Buffer Permitting Unit NCDWR — 401 & Buffer Permitting Unit
1650 Mad ,Service Center 512 N Salisbury Street
Raleigh, NC 27699 - 1650 Raleigh, NC 27604
FORM SSGP3080 8 -13 Page 7 of 7

11
Agent Authorization Form
DATE: July 14, 201.4
PROPERTY DESCRIPTION:
Project Number:
EYP -14000
Project Name:
Wake Health'Services Building
Parcel ID:
1713440583
Street Address:
1001 Rock Quarry Road
Raleigh, North Carolina 27610
Property Owner (Please print):
Penella M. Washineton. Chief Executive Officer. Wake Health Services. Inc.
The undersigned, registered property owners of the above noted property, do hereby authorize
George Buchholz, of The John R. McAdams Company, Inc., to act on my behalf and take all
actions necessary for the processing, issuance and acceptance of this permit or certification and
any and all standard and special conditions attached.
Property Owner's Address (if different than property above):
2620 New Bern Avenue
Raleigh, NC 27610
Telephone:
919 250 2921
iereby rtify e above info n submitted in this application is true and accurate to the
of our =1 e. i1
Date:

N WHSI BUILDING EXPANSION
AFIGURE 2. SOIL SURVEY MAP
0 500 1,000 2,000 PROJECT #: EYP -14000
Feet
f inch =1,000 feet RALEIGH, NORTH CAROLINA

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242 PROPOSED 10'
SANITARY SEWER-
EASEMENT
LD �0 i
/f I I
/ I I
- PROPOSED BUFFER
,= IMPACT ZONE 2 I i
I I PROPOSED BUFFER _L 14 -1
IMPACT ZONE 1I 1 I I 1
I-
T —I
UNNAMED� TRIBUTARY TO IWALNUT I I I I
CREEK
I�IIII
EXISITNG 30' SAN.
SEWER EASEMENT
MB 1988 PG 1358
�.I ��I I�I IiI 11111
LEGEND
EXISTING CONDITIONS
TOP OF STREAM BANK
TOTAL ON PROPERTY = 203 SF
ZONE 1 BUFFER
ZONE 2 BUFFER
PROPOSED IMPACTS
STREAM IMPACTS = 0 LF
ZONE 1 BUFFER IMPACT
TOTAL = 203 SF
ZONE 2 BUFFER IMPACT
TOTAL = 203 SF
1 111.111
ZONE "1 RIPARIAN I I
BUFFET
o_
I1 t.
ZONE "2" RIPARIAN
o BUFFER
NOTES
PROPOSED SANITARY
SEWER ENTERS NEUSE
RIVER BUFFERS AT AN
80 DEGREE ANGLE AND
TIES TO AN EXISTING
MANHOLE LOCATED ;
WITHIN ZONE 1 OF THE
NEUSE RIVER BUFFER.
GRAPHIC SCALE
30 0 15 �• . •
K111
\
1 inch = 30 ft.
®
EYP14000
W H S BLDG
E X P A NS O N
1� ��
COI�ANY••
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000 -INSET 1
C7
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EIIATE:
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Lirmee No.: C 089
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CADAMS
7-14 -2014
GARNER, NORTH CAROLINA

WHSI Expansion
City of Raleigh Stormwater Impact Analysis
General Descrimtion
Located at 1001 Rock Quarry Rd, and bounded by Rock Quarry Road, Martin Luther
King Jr. Boulevard and Raleigh Boulevard South in the Raleigh city limits, is the
proposed expansion of the 7 3 -5 -acre Wake Health Services site (PIN 0713 -44 -0583) The
proposed development will consist of a +/= 32,000 square foot two -story building
containing medical office and clinic space, which is a permitted use within the current
CUD O -I zoning, additional parking, and reconfiguration of existing parking and
sidewalks,
1EIvdrologv
Per City of Raleigh stormwater management regulations, peak flow rate detention is
required for proposed increases in the 2- and 10-,year storm events' Even though the site,
in the post - development condition proposes an increase in impervious area (0 82 -acre
increase), imperviousness, and the CN value, peak runoff rates were not generated
because detention at this site is ,not recommended. Geographically, this site is located
approximately 500 -ft upstream of the backwater floodplain for Walnut Creek. In
addition, there is a buffered stream that runs through the site that drains nearly 50 acres
(estimated) of downtown Raleigh Given this, detention at this site is not recommended
since providing detention would, at best, provide no benefit and, at worst, extend the peak
for the stream that runs through the property (and, potentially, affect adversely the
functioning of the culvert under Raleigh Boulevard South) and, potentially, extend the
peak for Walnut Creek.
TN
The City of Raleigh Apportioning Method was used to calculate the TN export
calculations for this ,site Since the post- development export is below the 10 lb /ac /year
threshold, an offset payment is proposed to meet the, City's nitrogen export requirements.
Please see the appropriate section in'this report for more detailed information
Calculation Methodologies
The field survey for the site was provided on 'September 19, 2013, by The McAdams
Company. Pre - development land- use,cover conditions. were derived from this survey.
Summary
Based on the above, this site meets City of Raleigh stormwater management regulations
Please refer to the appropriate sections in the report for additional maps, details, and
calculations.