20140671 Ver 1_Riparian Buffer Authorization_20140630

WITHERS RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
115 MacKenan Drive
Cary, North Carolina 27511
[phone]
FAX [phone]
TO: NC Division of Water Resources
512 N. Salisbury Street; 9`h Floor
Raleigh. NC 27604
WE ARE SENDING YOU
❑ Shop Drawings
❑ Copy of Letter
® Attached
❑ Prints
❑ Change order
ETTER OF TRA(�SMI TAL
DATE June 30, 201
loBNO. 02140199-00
ATTENTION
Ms. Karen Higgins
PHONE # [phone]
RE: Cascade Office Park
Buffer Authorization Request Submittal
02140199-00
Buffer Authorization Request
1
6/3o/2014
02140199-00
❑ Under separate cover via
❑ Plans ❑ Samples
❑ Diskette ❑
the following items:
❑ Specifications
COPIES
DATE
NO.
DESCRIPTION
6/30/2014
02140199-00
Buffer Authorization Request
1
6/3o/2014
02140199-00
CD of Application Packet
THESE ARE TRANSMITTED as checked below:
® For approval ❑ Approved as submitted
❑ For your use ❑ Approved as noted
❑ As requested ❑ Returned for corrections
❑ For review and comment ❑
❑ FOR BIDS DUE ❑ PRINTS RETURNED AFTER LOAN TO US
❑ Resubmit
❑ Submit
❑ Return
copies for approval
copies for distribution
corrected prints
nERAAnvc.
COPY TO: Ale
SIGNED: Martin Richmond
ffenclosures are not as noted, kindly notify us at once.

WITHERS RAVEN EL
June 27, 2014
NC- Division of Water Resources
401 Wetlands Unit
Attn: Ms. Karen Higgins
165o Mail Service Center
Raleigh, North Carolina 27699
Re: Cascade Point Office Park
W &R Project #02140199.00
Dear Ms. Higgins,
ENGINEERS I PLANNERS I SURVEYORS
o L�C���� 0 1� fI
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{
S iJA - V ATER QUAi_t1�
',Na�tlansis 8 Stormwa!;r: [3i znch
On behalf of Westview at Weston Owners Association, we are requesting authorization from the
NCDWR for 4,519 sq ft of permanent buffer impacts and 16,181 sq ft of temporary impacts for repair
and re- construction of three retaining walls at the existing Cascade Point Office Park in Cary, NC.
The project area is situated along the eastern portion of the office park, located at 98 Cascade Point
Lane in Cary (35.820662 °N; - 78.812002 °W). The project is located in the Neuse River basin and
onsite waters drain to Crabtree Creek. The Water Quality Classification for Crabtree Creek is C; NSW
and the Stream Index Number is: 27- 3341). The cataloging unit for the site is 03020201.
Proposed Project
The proposed project consists of construction of new retaining walls as the result of failure of the
existing retaining walls which support the fill associated with the office park. Portions of the
existing retaining walls have already collapsed, and there is evidence of failure in the remaining
walls. In order to allow room to construct the new retaining walls, the southern two retaining walls
will be constructed 12 feet from the base of the existing walls, and the northern retaining wall will be
constructed 15 feet from the base of the existing wall. This will require constructing the new walls in
the 5o -ft riparian buffer in select areas.
As part of the construction process, access to the area will be required through the use of a
temporary access corridor. This corridor will be constructed as minimally as possible, and any
removed vegetation will be restored within 6 months of completion of construction.
Project History
W &R met with Ms. Cherri Smith on site on May 28, 2014 to review the proposed work area. During
this meeting, Ms. Smith confirmed the repairs were fully necessary and would be allowable as
`Protection of Existing Structures'. Because the original construction of the retaining wall was
outside the riparian buffer, no previous authorizations have been issued.
115 MacKenan Drive I Cary, NC 275111 tel: [phone] fax: [phone]
www.withersravenet.com I License No. C -0832

Proposed Impacts
The proposed impacts consist of 4,519 sq ft of permanent impact to Zone 2, and 16,181 sq ft of
temporary impact (Zone 1: 4,361 sq ft; Zone 2: 11,820 sq ft). Impacts are required for the
construction of three separate newlretaining walls, replacing the existing failed retaining walls.
Temporary impacts -will be re- vegetated within 6 months of completion of construction.
Avoidance,and Minimization
The proposed construction has been designed to miriimize riparian buffer impact as much as
possible. The existing wall was constructed entirely outside of the riparian buffer; however,
engineering restraints do not allow for repair of the existing wall. Separate sections of new retaining
wall be constructed 12 to 15 feet away from the existing walls (minimum required distance)„ and
then tied to the existing fill. Access to the construction area will be restricted to the designated
temporary construction corridor, which is located entirely in high ground and will not result in impacts to
streams or wetlands
Mitigation
Because the construction activity is considered `Protection of Existing Structure', the buffer impacts
are "Allowable" and do not require mitigation.
The current request is for 4,519 sq ft of permanent impacts and 16,181 sq ft of temporary impacts to
riparian buffers (see the - attached maps and PCN for details).
Please feel free to call me at (919) 271 -0368 if you have questions or require additional information.
'Sincerely,
Mart'm'Richmond Troy Beasley
Environmental Scientist Environmental Project Manager
Attachments:
• PCN Form
• Agent Authorization
• USGS Quad Map
• Wake County Soil Survey
• I'mpact Exhibits
WITHERS & RAVENEL Page 2 of 2
E N GINE E FS I VLANN ER 1 5 UF VE 1015

DWR State of North Carolina
Department of Environment and Natural Resources
Division 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
1 a.
Name of project:
Cascade Point Office Park
1 b.
County:
Wake County
1c.
Nearest municipality:
Cary, NC
1d.
Subdivision name:
n/a
1e.
Is the project located in any of North Carolina's
twenty coastal counties. If yes, answer 1f 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:
Westview at Weston Owners Assocation c% TAM
2b.
Deed Book and Page No.
Book 013722 Page 02286
2c. Map Book and Page No.
(include a copy of the recorded
map that indicates when the lot
was created):
Book CM2002 Page 310
2d.
Responsible Party
(for Corporations):
Westview at Weston Property Owners Association
Betsy Dienes — Sr. Property Manager
2e.
Street address:
c/o TAM 1001 Wade Ave, Suite 300
2f.
City, state, zip:
Raleigh, NC 27605
2g.
Telephone no.:
(919) 645 -1435
2h.
Fax no.:
n/a
2i.
Email address:
bdienes(a�trademarkassoc.com
3.
Applicant Information (if different from owner)
3a.
Applicant is:
❑ Agent ❑ Other, specify:
3b.
Name:
3c.
Business name
(if applicable):
3d.
Street address:
3e.
City, state, zip:
3f.
Telephone no.:
3g.
Fax no.:
3h.
Email address:
FORM: BA 10 -2013 Page 1 of 8

INTERNAL DRAFT- NOT FOR PUBLIC USE
Section A. Applicant Information, continued
4.
Agent/Consultant Information (if applicable)
4a.
Name:
Martin Richmond
4b.
Business name
(if applicable):
Withers & Ravenel
4c.
Street address:
115 MacKenan Drive
4d.
City, state, zip:
Cary, NC 27511
4e.
Telephone no.:
(919) 469 -3340 (office) (919) 271 -0368 (mobile)
4f.
Fax no.:
(919) 467 -6008
4g.
Email address:
I mrichmondOwithersravenel.com
FORM: SSGP3080 8 -13 Page 2 of 8

B.
Project Information and Prior Project,History
1.
Property Identification
1 a
Property identification no (tax PIN or parcel ID)
Wake Co PIN# 0755537528
1 b
Site coordinates (in decimal degrees)
Latitude 35 820662 01\/
Longitude -78 812002 °W
1 c
Property size
±11 2 acres
2.
Surface Waters
2a
Name of nearest body of water to proposed project
Crabtree Creek, Stream Index 27- 33 -(1)
2b
Water Quality Classification of nearest receiving
Class C, NSW
water
2c
River basin
Neuse River (HUC Code 03020201)
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
Property is currently a developed 8- building office park with associated parking, General land use in vicinity is
office%ommercral development; Residential development is adjacent to west
3b
Attach an 8' /z x 11 excerpt from the most recent version of the USGS'topographic map indicating the location
of the site
3c
Attach an 8'/2 x 11 excerpt from the most recent version of the published County NRCS' Soil Survey,Map
depicting the project site
3d
List the total estimated linear feet of all existing streams (intermittent and perennial) on the property
1, 265 linear feet
3e
Explain the purpose of the proposed project
The project consists of the construction of new retaining walls as the result of failure of the existing retaining
walls which support the fill associated with the office park Portions of the existing retaining walls have already
crumbled, and there is evidence in the other retaining walls where they�are about to'fa►I as well In order to
allow enough room to construct the new retaining walls, the southern two retaining walls will be constructed 12'
from the base of the existing wall, and the northern retaining wall will b&constructed 15' from the base of the
existing wall This will push the new retaining wall into the 50' buffer ►n certain places, as shown in the
attached exhibits
3f
Describe the overall project in detail, including the type of equipment to be used
Project involves construction of three, new retaining walls Two of the new walls will be offset 12 feet from the
existing failed retaining wall, a third wall will be offset 15 feet from the existing wall A temporary 20 foot
construction comdor will be utilized, which will be replanted upon completion Equipment used will be manual
hand tools and typical small construction equipment, with some moderate sized construction equipment (I e
backhoe, front end loader, etc) utilizing the temporary construction corndor dunng construction Access to the
work area will be from high ground
4.
Jurisdictional Determinations
4a
Have jurisdictional wetland or stream determinations by the
El Yes ❑ No ® Unknown
Corps or State been requested or obtained for this property/
Comments Assumed a stream buffer
project (including all prior phases) in °the past?
determination letter was issued for this site
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
FORM BA 10 -2013 Page 3 of 8

B. Project Information and Prior Project History
5. Project History
5a Have permits or certifications been requested or obtained for
this, project �(mcluding all prior phases) in the past?
❑ Yes ❑ No ® Unknown
5b If yes, explain and detail according to "help file" instructions
6. Future Project Plans
6a Is,this a phased project?
❑ Yes ® No
6b If yes, explain
FORM SSGP3080,8 -,13 Page 4 of 8

C. Proposed Impacts Inventory
1. Buffer Impacts
1a Project is in which protected
® Neuse
❑ Tar - Pamlico ❑
Catawba
basin?
❑ Randleman ❑ Jordan ❑
Goose Creek
1 b Individually list all buffer impacts below If any impacts
require mitigation, then you MIUST fill out Section D of
this form
Buffer impact
Reason for
Type of impact
Stream name
Buffer
Zone 1
Zone 2
number —
impact
(exempt, allowable,
mitigation
impact
impact
Permanent (P)
allowable w/
required?
(sq ft)
(sq ft)
or Temporary
mitigation)
T
Impact 1
Construction of
Allowable
UT to Crabtree
❑ Yes ® No
0
4,519
® P ❑ T
New Retaining
(Protection of
Creek
Wall
existing structure)
Impact 2
Temporary
Allowable ( >2,500
UTto Crabtree
❑ Yes ® No
4,361
11,820
❑ P ® T
Construction
sqft disturbed,
Creek
Access Condor
vegetation will be
restored within 6
months)
Total
buffer'impacts
4,361
16,339
1 c Comments
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a Specifically describe measures taken to avoid or minimize the proposed impacts In designing project
Removal of existing wall and rebuilding, in place is not available option due to current parking and building
configuration and possibility of additional failure of existing walls 12 -ft and 1'5-ft offsets are required for
structural stability of new retaining walls Project will not result in any additional impervious surface in buffer
Temporary construction road will provide access during construction of the new retaining walls Vegetation
disturbance will be minimized to greatest extent possible Removed vegetation will be restored within 6 months
of completion of construction
1 b Specifically describe measures taken to avoid or minimize the proposed impacts through construction
techniques Work will be conducted under approved permitting process through Town of Cary, including
building permits (if required) and sedimentation and erosion control plans Work area will be accessed from
high ground, Proposed work areas will be clearly marked, Material stockpile will be in high ground, outside of
riparian buffer
FORM BA 10 -2013 Page 5 of 8

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 oMhe� 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
s uare 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
If no, then discuss what type of mitigation is proposed
2f
Comments
FORM SSGP3080 8 -13 Page 6 of 8

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.
1 a.
If due to site constraints, a BMP other than 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.
1 b.
Not applicable. 5tormwater BMP's currently in -place will be utilized and no additional
❑ Yes ❑ No
impervious area is proposed.
environmental document pursuant to the requirements of the National or State (North
F.
Supplementary Information
1.
Environmental Documentation
1 a.
Does the project involve an expenditure of public (federal /state /local) funds or the use of
❑ Yes ® No
public (federal /state) land?
1 b.
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):
Martin Richmond 6/27/2014
Z
L
Applicant/Agent's Printed Name Applicant/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided
Send 3 complete sets of this form and accompanying documents to the following:
For government transportation projects sent For government transportation projects sent
by first Class .Mail via the US Postul Service: by delivery service (L'PS, Fedf -r. etc.):
NC DWR, Transportation Permitting Unit OR NC DWR, Transportation Permitting Unit
1650 Mail Service Center 512 N. Salisbury Street
Raleigh, NC 27699 - 1650 Raleigh, NC 27604
For all other projects sent by First Class Mail OR f or all other projects sent by delivery service
via the 1. S Postal Service ((.'PS, FedFx, etc.):
FORM: BA 10 -2013 Page 7 of 8

Raleigh, NC 27699 - 1650 Raleigh, NC 27604
FORM SSGP3080 8 -13=
Page 8 of 8

AGENT AUTHORIZATION

WITHERS �- RAVEN EL
ENGINEERS I PLAN NER5ISURVEYORS
AUTHORITY FOR APPOINTMENT OF AGENT
The undersigned Owner Westview at Weston Owners Association (Client) does hereby
appoint Withers & Ravenel. Inc as his, her, or It's agent for the purpose of petitioning the
appropriate local, state and federal environmental regulatory agencies (US Army Corps of
Engineers, NC Division of Water Quality, NC Division of Coastal Management, local
municipalities, etc,) for a) review and approval of the jurisdictional boundaries of onsite
jurisdictional areas (wetlands, surface waters, riparian buffers, etc ) and /or, b) preparation and
submittal of appropriate environmental permit applications /requests for the Cascade Office Park.
The Client does hereby authorize that said agent has the authority to do the following acts on
behalf of the owner
(1) To submit appropriate requests /applications and the required supplemental
materials,
(2) To attend meetings to give representation on behalf of the Client
(3) To authorize access to subject property for the purpose of environmental
review by appropriate regulatory agencies
This authorization shall continue in effect until completion of the contracted task or termination by
the Client
Agent's Narne, Address & Telephone
Withers & Ravenel Inc
115 MacKenan Drive
Cary, NC 27511
Tel (919) -469 -3340
Date May 15, 2014
Signature of Client
Betsy Dienes Sr Property Manager
(Nanne>- Print) (Title)
1e . De�.oe, RNs cQr 7_ / /o4fivni_g QP Z{/Qe_tie� dUatPlLd 1'¢C40C
(Signature)
fl- b- T,444 1001 144ada A,ye 1 9300
Mailing Address
Raleigh_ NG 27605
City State Zip
Phone 919 - 645 -1435
Email Fademw Assoc com
115 MacKenan Drive I Cary, NC 275111 tel . [phone] fax [phone] www withersravenel com I License No. C -0832
1410 Commonwealth Drive I Suite 1011 Wilmington, NC 28403 1 tel [phone] fax [phone]
7011 Albert Pick Road I Suite G I Greensboro, NC 27409 1 tel [phone] fax [phone]

USGS TOPOGRAPHIC MAP
WAKE COUNTY SOIL SURVEY MAP

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