20031530 Ver 1_Complete File_20040301

Qua- w/{ William G. Ross Jr., Secretary
O North Carolina Department of Environment and Natural Resources
~ Alan W. Klimek, P.E., Director
O Y Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
March 1, 2004
Wake and Durham Counties
DWQ Project 03-1530
APPROVAL of 401 Water Quality Certification and AUTHORIZATION CERTIFICATE
Research Triangle Foundation
Attn: Elizabeth Rooks
Post Office Box 12255
2 Hanes Drive
Research Triangle Park, NC 27709
Subject Property: South Loop Road
Dear Ms. Rooks:

You have our approval, in accordance with the attached conditions, to impact 259 feet of streams for the purpose
of constructing the South Loop Road from Louis Stephens Drive to Davis Drive in Wake and Durham Counties
as you described in your application dated December 5, 2003 and modified on January 7 and January 9, 2004.
After reviewing your application, we have decided that this fill is covered by General Water Quality Certification
Number 3404, which may be viewed on our website at http://h2o.enr.state.nc.us/newetlands. This certification
allows you to use Nationwide Permit Number 14 when the Corps of Engineers issues it. In addition, you should
get any other federal, state or local permits before you go ahead with your project including (but not limited to)
Sediment and Erosion Control, Coastal Stormwater, Non-Discharge and Water Supply Watershed regulations.
This approval will expire when the accompanying 404 or CAMA permit expires unless otherwise specified
in the General Certification.
This approval is only valid for the purpose and design that you described in your application except as modified
below. If you change your project, you must notify us and you may be required to send us a new application. If
the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby
responsible for complying with all conditions. If total wetland fills for this project (now or in the future) exceed
one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). This
approval shall expire when the corresponding Nationwide Permit expires or as otherwise provided in the General
Certification. For this approval to be valid, you must follow the conditions listed in the attached certification and
any additional conditions listed below.
Conditions of Certification:
Certification of Completion

1. Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer
Rules, and any subsequent modifications, the applicant is required to return the attached certificate of
completion to the 401/Wetlands Unit, North Carolina Division of Water Quality, 1650 Mail Service
Center, Raleigh, NC, 27699-1650.

YXIT.

NCDENR
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (http:/fh2o.enr.state.nc.us/ncwctlands

Page 2
Research Triangle Foundation
March 1, 2004

Culvert Design
2. The culvert shall be installed and maintained as shown on the modified design submitted by Chris
Johnson of Withers and Ravenel dated January 9, 2004.

Violations of any condition herein set forth may result in revocation of this Certification and may result in
criminal and/or civil penalties. This Certification shall become null and void unless the above conditions are
made conditions of the Federal 404 and/or coastal Area Management Act Permit.

If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You
must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition,
which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative
Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions are final and binding
unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If
you have any questions, please telephone John Domey at 919-733-1786 or Steve Mitchell at our Raleigh
Regional Office at 571-4700.

Sincerely,

Kli lek,.E., Dir ctor

JRD/bs

Attachments
cc: Todd Tugwell, Corps of Engineers Raleigh Field Office
Raleigh DWQ Regional Office
File copy
Central Files
Kevin Martin, Soil and Environmental Consultants
Chris Johnson, Withers and Ravenel. 111 MacKenan Drive, Cary, NC 27511

N A TF9 Michael F. Easley, Governor
William G. Ross Jr., Secretary
QG North Carolina Department of Environment and Natural Resources
y Alan W. Klimek, P.E., Director
-I Division of Water Quality
D Coleen H. Sullins, Deputy Director
Division of Water Quality
Division of Water Quality
Department of Environmental and Natural Resources

Wetlands/401 Unit

Street Address: 2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
Mailing Address: 1650 Mail Service Center
Raleigh, NC 27699-1650

Contact Information: Phone [phone]
Fax [phone]

Fax To: Q ~~i~ Y V ~C~~1>`^ Fax -qZI6 z

Company: Date: Z

Number of pages including cover sheet: Z7

Notes or special instructions:

N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), (http://h2o.enr.state.nc.us/ncwctlands

Re: RTP imap://[e-mail].n

Subject: RE: RTP South Loop Rd. DWQ#03-1530, Wake/Durham County
From: "Kevin Martin" <[e-mail]>
Date: Thu, 26 Feb 2004 11:03:57 -0500
To: "Chris Johnson" <[e-mail]>, "Liz Rooks" <[e-mail]>,
<[e-mail]>

John, we met in your office on 1/7/04 to discuss this project and your 12/10/03 on hold letter and based on
additional info submitted by the engineer, determined you could issue the 401. So far RTP, Withers and
Ravenel nor I remember getting the 401 approval letter can you check on the status of it. Thanks Kevin

I of 1 2/26/0

MEMORANDUM

TO: John Dorney Regional Contact: Steve Mitchell
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS

Facility Name Research Triangle Park Site 27 Access Rd (S. Loop County Wake
Project Number 03 1530 County2 Durham
Recvd From APP Region Raleigh

Received Date 12/5/03 Recvd By Region
Project Type linear road project

Certificates Stream Stream Impacts (ft.)
Permit Wetland Wetland Wetland Stream Class Acres Feet L~J__
Type Type Impact Score Index Prim. Supp. Basin Req. Req. 11t r:1,I,

F 14 Stream O Y O N 16-41-1-17 -C _ NSW 30,605T- 259.00 259.00
NBR Buffers O Y _0N F_ 30,605. F_ F- I F-
F___F PT _0N ~~~~~F_ F_

Mitigation Wetland
MitigationType Type Acres Feet
Stream mitigation bank Stream 2 99.00

Is Wetland Rating Sheet Attached? O Y ON Did you request more info? O Y ON

Have Project Changes/Conditions Been Discussed With Applicant? O Y O N
Is Mitigation required? O Y O N Recommendation: O Issue O Issue/Coed O Deny

Provided by Region: Latitude (ddmmss) Longitude (ddmmss)

Comments:
. an to, 2004

Why does DOT DENY arched culverts when they reduce the amount of impact to perrennial stream
to nothing compared to double barrell 72's????

Is there enouQh mitigation left at Tffick Creek for this proiprt/

cc: Regional Office
Central Office Page Number 1

'Jd C, ) a .5 - ) S ~ U

~0 Lam`
ENGINEERS I PLANNERS I SURVEYORS

J WETLANDS /401 GROUP
January 9, 2004
JAN 0 9 2004
John Dorney ~J~.'r~.Ll3YWSECTiO,'I
Division of Water Quality
2321 Crabtree Blvd. Suite 250
Raleigh, NC 27604-2260

RE: Research Triangle Park Site 27 Access Road (South Loop Road)
W&R Project No. 98184

Dear Mr. Dorney:
Per your request, we are writing this letter to you regarding the proposed culvert design on the above
referenced project. As discussed in our meeting at your office on January 7, 2004, the proposed
design consists of (2) 72" RCP's with one pipe aligned directly with the stream channel and the
second pipe offset to the northern side of the stream. A concrete baffle is also proposed at the
upstream end of the offset pipe to ensure flows at bank full or less are accommodated by the main
72" pipe aligned with the stream. It is our understanding that your office wants to ensure the
contractor installs the baffle correctly and at the location as discussed in our meeting. We have
included with this letter a copy of the plan sheet and have highlighted the notes/details that
address these issues.
We trust this letter and attachment satisfy your office's requests. If you have any further questions
or require additional information, please feel free to give us a call. We appreciate your continued
assistance on this project.

Regards,

WITHERS &-RAVENEL, INC

Chris Johnson, P.E.

cc: Ms. Elizabeth H. Rooks, Research Triangle Foundation
Kevin Martin, Soil & Environmental Consultants, Inc.
Randy Boyd, NCDCIT Hydraulics Unit

K:\98\98-180\98184\Proj\010904.jd.doc
iii MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: 919.r467.6oo8 i www.withersravenel.com

Triage Check Dist

--s ?
__~LTI
Date: - Project Name.
DWQ#: 0*~~~.X530
County: l~c~ r

To: ? ARO Mike Parker WaRO Tom Steffens

? FRO Ken Averitte ? WiRO Noelle Lutheran
? MRO Alan Johnson ? WSRO Daryl Lamb
RRO Steve Mitchell /

~b
From. . TelePhone : (919).73_3
~

The file attached is being forwarded to your for your evaluation.
Please call if you need assistance.

? Stream length impacted
? Stream determination
Wetland determination and distance to blue-line surface waters on USFW topo maps

Minimization/avoidance issues
ABuffer Rules (Meuse, Tar-Pamlico, Catawba, Randleman)
? Pond fill
? Mitigation Ratios

? Ditching
?lAre the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings?

? Cumulative impact concern

Comments:

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CHANNEL INLET DETAIL BAFFLE DETAIL NOTE TO CONTRACTOR
(NOT TO SCALE)
1 i, 1 1 THE CONTRACTOR SHALL
r~ VARIES CROSS SECTION PROFILE
t s ` 30' NDWALL ENDWAAT THE UPSTREAM INVE
MAX ~ _ STREAM BED BAFFLE OFFSET FROM EXISTING
y TOP OF BAFFLE
IN THE DETAILS TO THE
I s N N_ (299.00') EST. DDE: ~tv~ INVERT IN (302.00')
' '1 THICK AND DOWELED IN
55 CU. YDS. 2h FLOW
AND EPOXY CEMENT. AL
I - - - OF COVER.
- f1• VARIES
t:.+11 ~.J 4'-20' NN, _ I I
NN, REBAR REBAR STREAM BED
1r n r1 1 1 (300.00')
+00.00
' J' A } ` 125.00'
> Q RIM=304.91T +RESEARCH TRIANGLE FOUNDATION
} 1 `C) INV. 11`1=201E 38 DB 1670, PG 239
G 1 1 INV. ouT=2115,32 -L- PC Sta. 14+95.08 PIN #0736.01-48-6881
Ax~~ ~
NCDOT ENDWALL i
\ SEE NOTE TO CONTRACTOR +50.00
, \ s T 112.00'
}11iEt} 11 t~ 11 I \~~~T~ ~w \ LATERAL 'V' DITCH , i +95.08 FALSE SU?Vff
111'1 } 1 , 1 V A °T 1 SEE DETAIL B 75.00' '-`SEE-
DETAIL'
I 1 1 , T +83.33
' -L- POT STA. 9+61.15=
II_,,ti , , \ \ F~ \ +75.00 79.75' / I 1 1 Sta_15-I-b7.76
45.00 ) +sb.ao so.oo' / -
11 S`,', -L- POT STA.115+42.73 (U ~1026B
~1. 1 111, , 1 1 125. 06
1 , 1 .,i- I } , + \ \ Sta. 13+24,43
;,I
,i `,I -L- POT STA. 10+09.41= r25.oo' \ 8~.4'.85 - 1,J ~
-L- POT STA. 115 + 39.86 (U-40266) 96.01'\ y . Y . o lc~ r_ - 5 -
I ~ ~fTT955
111 i'. t 1: I 1 t
1`1
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BEGIN STATE PROJECT AQ
1111 1 111};:_. -2
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SEE DETAIL A ' CIA
} F ' 1 1 } 125.59' +00.00 5.00 < ~p +96-00 S _
+50.00 83.72' 75.00' 90.00^-1
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„ 1 , 1 ; 1 1 , 1 11, ~ , 1 a ~c. 93- +55.00
R 50„ ~v \
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1 , 1ltII~I1}I } t 11 i %1 NJ IIp \t A A 2 i N ~•t,
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RE..
1 1} 1 1 k1 1 %I N \N 1 +
1 I 1 r 11 i 1 1'1 t7"~~ 11 r + INV. IN=291.59
} 1, 1x 1 1 1 \I i I _ 1 k ~ V t t~ ~ ' t 1 i p•, A A II
_
+ 1 1 1 1 , 1 , ; I INV. OUT=291.52
} 1 1 1, 1 11:1 r 0 I +71.36 ~~1 Q G A ~l
11 1 11 1 LL
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1 , 1 1 11111 , I tj 1+1i - y` v 1 ~ y'~~ } ~ ~ +52.20 +00.00` \
1 1 b1 111111 li l t11 1i 1 )I' 1~ 4 ` ` 1., 1 A
1I r.', +++It~~,tI,11;, 110.33' 110.00'
IN I } 1.t 1 I,1 1 , 100 TONS CLASS 2 RIP RAP
1 I L.i}', ,1-k I , t t I'p Ilk 1 W/ 100 SY FILTER FABRIC
1 1 1 1~' I I 111.1 I l QI' \ 1 11' I , V . A 75.19 P
R 5Q'
1 } GRA-350 , + NCDOT O SEE CHANNEL OUTLET DETAIL
F 91.84' ENDWALL
}111\I1, 111}1111 ~ 114 `II ~ ' 111 1 I \ \
` +00.00 +50.00
1 1 1 1 11111 1111 } 1 1 1 2 i 1 1
C ' - 95.00' - - +35.00 138.00' CHANNEL OUTLET DETAIL
1 1 1 1} +'1 1} t} t s,, u 1 ,<1 i TOE PROTECTION 142.00'
,1 } 11 t 1 1 1 1 + 1 + ! 1 " i'I- SEE DETAIL A
1 RIP RAP DISSIPATOR
a + 1 1 1 11 1 11 1 } i,;.1 R t , 1 . 1 1 WETLANDS EST. DDE: VARIES NATUF
l 1 1 111 . 1 1 111 111 11 +99.22
SEE DISSIPATOR DESIGN (4' CHANNEL) \ 200 CU. YDS. 35' MAX. GROUT
11111 75.00' SHEET 3B
110111 f 1 , 111111,. 111 l 1 l' I~ 11 111 t ,
1 1~1 1 1 1 . 1 1 I 1 k1 1 l t 1 1} 1 , 1' 01 11 l;l 1 1 ` 1 +89.90 BED LEVEL d=
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\1%11 1 i 1`I 1, 1 1 1 1 , 11 1~1 1 1 1 1 83.77' FILTER FABRIC TYPE ,
1 1 1 1 1 1 1 11 1 1 1 1 1 I t 4't III 1} ' ti 11 1+ 1 1 1 1 I~ '
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rt 1 J% I JFJ, 111 11 41 1 t_ ;1 1`11111 } 1 iv 27' THICK F'
I l t l l l l l f t i l lot i k l t 1 1 1 , a 1 ~_1 1., 111 +44.78 2h 3' KEY
1 1 1 1 1 1 1 1 1 1 1~1 1 1 1 1 t\ ; .1 1'yl 11 1
1, 1 1 1 1 1 1 I t IM, 11 1 1 -a 11'1 t 126.25' VARIES
111111 V 1' 1 1 f i l ~~'.1~11 6 1 1 V~; ~I 1{ 1 1 1 1
1 1 1 1 1 1 1 1. t 1 1.1 1 1z,.,-.n1 1 1. 9 1 E \ w.h' A o, , 1 4.0'- 20'

Soil & Environmental Consultants, PA
11010 RaNen Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] Fax: [phone]
tvww.SandEC.com

WETLANDS/,`.i)1 G"OUP

JAN 1) 7 ZOO,

VVXFER QUALI 11 Y SECTION

January 7, 2004
Mr. John Domey
NC DWQ Wetlands Unit
2321 Crabtree Blvd.
Raleigh, NC 27604

Dear Mr. Dorney,

Subject: Your 12/10/03 Letter DWQ#03-1530 Regarding the South Loop Rd.

Please find attached 7 copies of the additional inforlnation you requested regarding this
project. The client, project engineer and I will also be meeting with you today to address
your questions in person. Item one of your letter is addressed by the attached copy of the
401 Water Quality Certification previously issue for this and another project (DWQ #01-
0053) dated 3/23/01. Item 2 is addressed by the attached letter fron Withers and Ravenel
dated 1/6/04 and item 3 is addressed by the attached letter from Research Triangle
Foundation date 12/19/03. Please let Ine know if you have questions or need anything
further to complete the processing of this application.

Kevin Martin

President

Enclosures : Original DWQ 401
Withers and Ravenal Letter
Research Triangle Foundation letter

Charlotte Office: Greensboro Office: Hickory Office:
236 LePhillip Court, Suite C 3817-E Lawndale Drive 622 Coon Mountain Lane
Concord, NC 28025 Greensboro, NC 27455 Taylorsville, NC 28681
Phone: [phone] I'hone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone] Fax: [phone]

tOF W ATFRQ - / Michael F. Easley
Governor
o r William G. Ross, Jr., Secretary
n I~ i Department of Environment and Natural Resources
Kerr T. Stevens
Division of Water Quality
March 23, 2001
Durham and Wake Counties
DWQ Project # 01-0053
WAIVER of 401 Water Quality Certification

Elizabeth H. Rooks
Planning and Development, Research Triangle Park
P.O. Box 12255
Research Triangle Park, NC, 27709
Dear Ms. Rooks:

Your application for a 401 Water Quality Certification was received in the Division of Water Quality's
Central Office January 18, 2001. According to our rules [15A NCAC 2H .0507 (A)], if final action is not taken
within 60 days, the Certification is waived unless DWQ has objected in writing to your application. Therefore,
DWQ has waived the requirement for a 401 Water Quality Certification for your plains to impact 1062 linear feet
of streams for the Louis Stephens Drive and South Loop Road project as described in your application.
However if additional impact occurs or your development plains change, this waiver is no longer valid
and a 401 Water Quality Certification will be required.

Please call me at 919-733-9646 if you have any questions.
Sincerely,

r-hR ~
rn V
I/

Cc: DWQ Raleigh Regional Office
Raleigh Regulatory Field Office U.S. Army Corps of Engineers
Wilmington District Office Corps of Engineers
- Central Files -
File Copy
Jennifer Burdette, 11010 Raven Ridge Road, Raleigh, NC, 27614
010053

North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)

01/05/04 12:47 FAX [phone] WITHERS & RAVErEL 10 002/003

VII ¦ ¦ H E:F;ZS &RAVEN EL
ENGINEERS 1 PI.ANNER5 I SURVEYORS

January 6, 2004

Kevin Martin
Soil & Environmental Consultants, Inc
11010 Raven Ridge Road
Raleigh, NC 27614

RE: Research Triangle Park Site 27 Access Road (South Loop Road)
W&R Project No, 98184
Dear Kevin:

We are writing this letter to you regarding the Division of Water Quality's (DWQ) request for
additional information concerning the stream crossing on the above referenced project. Worwere
requested to provide a response to comment #2 from the DWQ letter dated December 10, 2003. Our
response to this comment is as follows:
The existing stream channel is approximately 4-feet wide and 2-Feet deep. It lies
within a floodplain approximately 200 to 250 feet in width. The upstream
watershed from the stream crossing consists of 190 acres. The proposed culverts
were designed per NCDOT requirements for a fully developed watershed
according to the maximum allowable 301/a impervious surface allowed within the
Research Triangle Park. Assuming full build-out, the existing- channel (no
roadway) will not accommodate the 1-year storm. Hydraulic assessment
indicates the water overflows the banks and fills in the floodplain.
The proposed culvert design includes one 72" pipe to be buried one foot in the
existing channel and the second pipe offset to the north side of the channel. We
have proposed to install a concrete baffle at the upstream end of the offset 72"
culvert to ensure that when flows are at bank full or less the water will flow only
through the 72" culvert that is aligned directly with the strearh channel. Upstream
and downstream improvements are also proposed to transition the channel to the
culvert inlets and then from the culvert outlets back to the channel. The
downstream banks will be armored with Class II Rip Rap to prevent disturbance of
the channel. This bank protection will be utilized most during 1-year storms and
less when the water elevation remains below the top of the stream banks.
During storm events heavier than the 1-year storm when flows rise above bank full
depth, the second 72" pipe offset from the stream channel will also be utilized.
During these storms, the water elevation quickly rises above the stream banks
both upstream and downstream of the culverts. Therefore, the water flow is not
being forced through the 4-foot channel at the downstream end, but is flowing
within the floodplain. Due to the proposed channel improvements, water
velocities at the culvert outlet for the 2-year and 10-year storms are reduced from
the existing build-out condition of 4.5 fps and 4.6 fps to 1.9 fps and 3.5 fps,
respectively, Velocities downstream of the channel improvements remain
unchanged from the existing build-out condition at 4.2 fps and 4.9 fps.
KA9 8\98-18 0\98184\Proj\01 0604.km.d oc
111 MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] rax: 919.467.6oa3 1 www.withersravenel.com

01/05/04 12:48 FAX 919 467•.6008 WITHERS & RAVENEL 0003/003

Due to the conditions stated, we believe the proposed culvert design is
satisfactory and will not sacrifice the stability of the existing stream channel.
Therefore, we would like to request the Division's approval of the current design.

We trust this letter clarifies the design used for the stream crossing on this project. Please feel free
to forward this information to the Division of Water Quality for their review. If you have any further
questions or require additional information, please feel free to give us a call.
Sincerely,

WITHERS dcRAVENEL, INC

William E. Lee, E.

WEL/csi
cc: Ms. Elizabeth H. Rooks, Research Triangle Foundation
Randy Boyd, NCDOT Hydraulics Section

i -

K:\98\9t3-180\981534\Pro~1010604.km.doc

Research Triangle Foundation of North Carolina

2 Hanes Drive Elizabeth H. Rooks, Vice President, Planning & Development
Post Office Box 12255
Research Triangle Park, North Carolina 27709
Telephone: [phone] FAX: [phone]

December 19, 2003

Mr. John Dorney
North Carolina Division of Water Quality: Wetlands/401 Unit
1650 Mail Service Center
Raleigh, NC 27699-1650

Dear Mr. Dorney:

I am writing this letter to outline the history of the development of the southern portion of
the Research Triangle Park and the steps we have taken to protect the quality of
stormwater run-off from our property. I hope this is satisfactory to address your concerns
regarding potential secondary impacts from the construction of the south loop road.

In 1986 the Research Triangle Foundation began planning the development of the 2300
acres which comprise the southern portion of the Research Triangle Park. The
Foundation contracted with the School of Design at N.C. State University to prepare a
land plan for this area. Instructions to the School of Design were to prepare "the best
plan possible" for this land - a plan which would accommodate research uses but which
would be an environmentally responsible plan. The Foundation recognized that our land
included floodplains, wetlands, steep slopes, wildlife (although mock environmental
impact studies conducted by the School of Forestry at N.C. State University have not
found any rare or endangered species) and was in the upper reaches of the watershed for
Jordan Reservoir.
The plan, prepared by the School of Design and currently under implementation by the
Foundation, provides for a significant amount of land to be placed in permanent open
space. For our purposes, this open space is designated as either "Natural Area Preserve"
or "Surface Cover Maintenance Areas". The Natural Area Preserve encompasses the
floodplain and wetland areas associated with the streams which cross the property. In
many areas the Natural Area Preserve includes additional wooded areas beyond the actual
floodplains. Areas of steep slopes and drainageways on the adjoining lots are designated
as "Surface Cover Maintenance Areas" which will be retained in existing vegetation to
reduce the potential detrimental effects of erosion and sedimentation during construction
on these sites and to help infiltrate stormwater run-off from these sites after development.
Surface Cover Maintenance Areas are defined by easements on the plats when the lots are
transferred. An estimated 500 of our 2300 acres will be in Natural Area Preserve and an

DEVELOPERS OF THE RESEARCH TRIANGLE PARK

Mr. John Dorney
Page 2
December 19, 2003

estimated 260 acres will be in Surface Cover Maintenance Areas. In addition, lot
coverage (i.e., impervious surface) is limited to 30%. (Please note that the Foundation
was planning for limitations on impervious surfaces long before the State regulations
called for a five mile protected area around Jordan Reservoir.) . Also note that the over all
project will be less than 30% impervious surface as we estimate that approximately 230
acres of the Natural Area Preserve will not be assigned to adjacent lots for the purpose of
calculating the permitted impervious surface. In addition, both Wake and Durham
Counties have adopted requirements for stream buffers which are applicable to the
respective portions of RTP. Finally, all of the public roads in RTP are built without curb
and gutter. The use of sheet flow and grassy swales for road run-off has been a policy of
RTP for the past 44 years.

The plan prepared by NC State School of Design also called for construction of a series
of lakes. These lakes were intended to retain at least the first 1/2 inch of stormwater run-
off to further protect the quality of the stormwater leaving our property. To date, two of
these lakes have been constructed and the third and final lake is nearing completion of
design and permitting (the 401 permit has already been issued) and we expect to start
construction on it this spring.

We believe the extension of South Loop Road to Davis Drive is important to assuring
adequate east-west traffic circulation for this portion of RTP. This will allow traffic from
the lots which adjoin South Loop Road to disperse between two major thoroughfares:
Davis Drive and Louis Stephens Drive. Without the Davis Drive connection and until
Louis Stephens Drive is connected south to Cary, traffic would be forced to take a very
circuitous route via Louis Stephens Drive to Kit Creek Road and then travel east to Davis
or west to NC 55.

I would welcome an opportunity to meet with you to discuss further the need for this
road, our water quality protection efforts in RTP and any other concerns you may have.

Sincerely,

Elizabeth H. Rooks

EHRhnc

~~F WA1~9o Michael F. Easley, Governor
William G. Ross Jr., Secretary
G North Carolina Department of Environment and Natural Resources
Alan Klimek, P.E., Director
pp 'C Division of Water Quality
13~ r
Coleen 11. Sullins, Deputy Director
Division of Water Quality
December 10, 2003
DWQ # 03-1530
Wake/Durham County
CERTIFIED MAIL - RETURN RECEIPT REQUESTED

Research Triangle Foundation
Attn: Elizabeth Rooks
Post Office Box 12255, 2 Hanes Drive
Research Triangle Park, NC 27709

Subject Property: South Loop Road, unnamed tributary of Kit Creek
Dear Ms. Rooks:

On December 5, 2003 the Division of Water Quality (DWQ) was notified by receipt of your application
regarding your plan to fill wetlands or waters for the purpose of providing road connectivity in
Wake/Durham County. Approval from DWQ is required to disturb these areas. Please provide 7 copies
of the following information and refer to the DWQ # listed above in your reply. Please show these on
maps of suitable scale (for instance 1" = 100 feet) so we can begin to determine your projects'
compliance with 15A NCAC 2H.0500.

Additional Information Requested:

1. You stated within your application that; "S&EC prepared a Nationwide Permit dated January
17, 2001 that included this stream crossing and other impacts for the Louis Stephens Road
project. The permit indicated the use of a bottomless culvert at this stream crossing and was
approved by your (US Army Corps of Engineers') Office." Was a 401 Water Quality
Certification issued for this project? If so, then please provide a copy of the authorization
letter or DWQ project number.

2. Your plans propose that use of "dual 72 inch RCP's". The impacted stream is identified on
your plans as a "4 foot channel". The DWQ believes that using dual 72" RCPs would widen
the stream from 4 feet at the proposed crossing to 12 feet. The DWQ believes this will
potentially destabilize the stream resulting in cumulative impacts to the stream. Please
redesign the crossing in a manner that will not widen the stream at the crossing or provide
evidence that the proposed plan will not destabilize the stream. You may choose to use a
single 72-inch RCP in alignment with the stream and multiple "flood plain" culverts (such as
dual 36" RCPs) at an invert elevation above the bankfull elevation of the stream.

3. Our rules require an evaluation of cumulative impacts for projects in relation to downstream
water quality standards. Please examine the latest draft of DWQ's policy on our website and

41
IVA
i- OENR
N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (location)
[phone] (phone), 919-733-6893 (fax), (hltp7//l12o.enrst.ite.nc.us/ncwetllncls)
Customer Service 1-877-623-6748

Research Triangle Foundation
Page 2
December 10, 2003

provide a qualitative analysis which addresses cumulative impacts from growth associated
with this project. -

Please telephone me at 919-733-9646 if you have any questions or would require copies of our rules or
procedural materials. This project will remain on hold as incomplete in accordance with 15A NCAC 2H
.0505(c). The processing time for this application will begin when this information is received. If we
do not hear from you by writing or by fax at [phone] within three (3) weeks we will assume you
no longer want to pursue the project and will consider it withdrawn.

Sincerely,

l

mey
40 Water Quality Ce ification Program

JRD/bs

cc: Raleigh DWQ Regional Office
Raleigh Corps of Engineers
Central Files
File Copy
Kevin Martin, S&EC

F WArF m icnaw r. nasiey, tiovemor
~O 19P William G. Ross Jr., Secretary
~O G North Carolina Department of Environment and Natural Resources
.y
> Alan Klimek, P.E., Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
December 10, 2003
DWQ # 03-1530
Wake/Durham County
CERTIFIED MAIL - RETURN RECEIPT REQUESTED
Research Triangle Foundation
Attn: Elizabeth Rooks
Post Office Box 12255, 2 Hanes Drive
Research Triangle Park, NC 27709

Subject Property: South Loop Road, unnamed tributary of Kit Creek

Dear Ms. Rooks:

On December 5, 2003 the Division of Water Quality (DWQ) was notified by receipt of your application
regarding your plan to fill wetlands or waters for the purpose of providing road connectivity in
Wake/Durham County. Approval from DWQ is required to disturb these areas. Please provide 7 copies
of the following information and refer to the DWQ # listed above in your reply. Please show these on
maps of suitable scale (for instance 1" = 100 feet) so we can begin to determine your projects'
compliance with 15A NCAC 211.0500.
Additional Information Requested:

1. You stated within your application that; "S&EC prepared a Nationwide Permit dated January
17, 2001 that included this stream crossing and other impacts for the Louis Stephens Road
project. The permit indicated the use of a bottomless culvert at this stream crossing and was
approved by your (US Army Corps of Engineers') Office." Was a 401 Water Quality
Certification issued for this project? If so, then please provide a copy of the authorization
letter or DWQ project number.

2. Your plans propose that use of "dual 72 inch RCP's". The impacted stream is identified on
your plans as a "4 foot channel". The DWQ believes that using dual 72" RCPs would widen
the stream from 4 feet at the proposed crossing to 12 feet. The DWQ believes this will
potentially destabilize the stream resulting in cumulative impacts to the stream. Please
redesign the crossing in a manner that will not widen the stream at the crossing or provide
evidence that the proposed plan will not destabilize the stream. You may choose to use a
single 72-inch RCP in alignment with the stream and multiple "flood plain" culverts (such as
dual 36" RCPs) at an invert elevation above the bankfull elevation of the stream.

3. Our rules require an evaluation of cumulative impacts for projects in relation to downstream
water quality standards. Please examine the latest draft of DWQ's policy on our website and

N. C. Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
[phone] (phone), 919-733-6893 (fax), htt ://h2o.enr.state.nc.us/ncx%,ctlinds)
Customer Service 1-877-623-6748

Research Triangle Foundation
Page 2
December 10, 2003

provide a qualitative analysis which addresses cumulative impacts from growth associated
with this project.

Please telephone me at 919-733-9646 if you have any questions or would require copies of our rules or
procedural materials. This project will remain on hold as incomplete in accordance with 15A NCAC 2H
.0505(c). The processing time for this application will begin when this information is received. If we
do not hear from you by writing or by fax at [phone] within three (3) weeks we will assume you
no longer want to pursue the project and will consider it withdrawn.

Sincerely,

l -
. mey
#40W ater Quality Cc ification Program

JRD/bs

cc: Raleigh DWQ Regional Office
Raleigh Corps of Engineers
Central Files
File Copy
Kevin Martin, S&EC

„t.

foil Environmental Consultants, PA
11010 Raven Ridge Road Raleigh, North Carolina 27614 Phone: [phone] Fax: [phone]
www.SandEC.com
WETLANDS 1401 GROUP
s1 f ' t
DEC 0 De&ffiber 5, 2003

WATER QUALITY SECTION

US Army Corps of Engineers a - _ - DEHNR-DWQ
Attn: Mr. Todd Tugwell Wetlands Group
6508 Falls of the Neuse Rd., Ste.-L120 ` Attn: John Dorney
Raleigh, NC 27615 C,:. NO. 2321 Crabtree Blvd., Ste. 250
DATE Raleigh, NC 27604

RE: Nationwide Permit/14 Request-Research Triangle Park Site 27 Access Rd (S. Loop Rd)
Wake and Durham County, North Carolina
S&EC Project 1625.W0

Dear Mr. Tugwell and Mr. Dorney:

On behalf of Research Triangle Park (property owner), we hereby request that the US Army
Corps of Engineers issue our client a Nationwide Permit 14 for the subject project which covers
permanent impacts to a stream channel. A Pre-construction Notification Application (PCN) and
an agent authorization form are enclosed.

The proposed project consists of South Loop Road a connection to Davis Drive. Please refer to
the USGS topographic map attached for the location of the project. The Corps has been
provided with correspondence previously from NCDOT and the project engineer concerning the
need for the project and impact minimization an additional justification letter from Withers and
Ravenel dated 11/26/03 is attached.
All mitigation required for the permitted impacts (including those not yet completed) will be
performed at the Mt. Vernon Springs mitigation site in Chatham County. This site is projected to
yield 4567' of stream mitigation based on plans already approved by DWQ and the Corps. So
far 768' was used for Louis Stephens Road and 3308' for a RTP Lake. This project will utilize
259' at a 1:1 ratio leaving 232' of credit remaining at Mt. Vernon Springs. The Corps has agreed
to a 1:1 mitigation ratio for this impact.

The proposed South Loop Road begins at the southern terminus of Louis Stephens Drive and
runs southeast across the proposed Northern Wake Expressway, crosses an unnamed tributary of
Kit Creek, and connects to Davis Drive (SR 1999). Please refer to the attached map (Figure 1)
for the location of the proposed connector road on a USGS topographic quadrangle.

S&EC delineated the wetlands and stream channels adjacent to and crossed by the project. Mr.
Eric Alsmeyer of the USACE verified the delineation on June 28, 1999. Mr. Todd Tugwell of

Charlotte Office: Greensboro Office: Hickory Office:
236 LePhillip Court, Suite C 3817-E La%vndale Drive 622 Coon Mountain Lane
Concord, NC 28025 Greensboro, NC 27455 Taylorsville, NC 28681
Phone: [phone] Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone] Fax: [phone]

December 4, 2003
S&EC Project 1625.W0
Page 2 of 2

the USACE also conducted a field visit and provided importance determinations for the stream
channels that will be impacted by the project. NC DWQ has not conducted significance calls for
the project. In this application, streams that were classified as important by the USACE were
also assumed to be significant and perennial by DWQ.

The impacts to stream channels as a result of the proposed South Loop Road are listed below.

Impact Proposed Channel Linear Ft. Total Impact
Location Road Stream Type Width of Impact (sq. ft./acre)

South Loop UT to Kit Important 4 259' 1036
Road Creek Perennial

The USACE's current policy requires applicants to avoid and minimize wetland and stream
channel impacts to the maximum extent practicable and compensatory mitigation to offset
unavoidable losses of important waters of the US when impacts exceed the thresholds for
notification (0.10 acre) or if a discharge to a special aquatic site such as a wetland is proposed.
NC DWQ's current policy requires mitigation for significant stream channel impacts exceeding
150 linear feet or more per tributary. The proposed road alignment has been designed to cross
the stream perpendicularly. Impacts to jurisdictional wetlands were avoided.
Please call if you need further information to process this request.

Sincerely,

Kevin C. Martin l/
President

Attachments: (1 through 5 previously submitted with original PCN)
1. Pre-construction (PCN) notification form
2. Site Location Map (Figure 1)
3. Impact Maps
4. Impact Maps, Blow-up
5. Agent Authorization Form
6. Withers & Ravenel Letter
7. NCDOT Letter

Office Use Only: Fonn Version May 2002

USACE Action ID No. DWQ No.
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)

1. Processing

1. Check all of the approval(s) requested for this project:
? Section 404 Permit ? Riparian or Watershed Buffer Rules
? Section 10 Pen-nit ? Isolated Wetland Permit from DWQ
? 401 Water Quality Certification

2. Nationwide, Regional or General Permit Number(s) Requested: 14

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 Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (verify availability with NCWRP prior to submittal of PCN), complete
section VIII and check here: ?

5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ?

II. Applicant Information

1. Owner/Applicant Information
Name: Research Trian_le Foundation
Mailing Address: PO Box 12255 (2 Hanes Drive)
RTP, NC 27709

Attn: Elizabeth H. Rooks, V.P. Planning & Development
Telephone Number: 919-549-8181 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: Kevin Martin
Company Affiliation: Soil & Environmental Consultants, PA
Mailing Address: 11010 Raven Ridt;e Road
Raleigh, NC 27614

Telephone Number: [phone] Fax Number: [phone]
E-mail Address: kmartin(a)SandEC.com

Page 5 of 13

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 informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: South Loop Road

2. T.I.P. Project Number or State Project Number (NCDOT Only):

3. Property Identification Number (Tax PIN):

4. Location
County: Durham & Wake Nearest Town: Raleigh
Subdivision name (include phase/lot number):
Directions to site (include road numbers, landmarks, etc.): The project consists of connector
road. The proposed South Loop Road begins at the southern tenninus of Louis Stephens
Drive and runs southeast across the proposed Northern Wake Expressway, crosses an
unnamed tributary of Kit Creek, and connects to Davis Drive (SR 1999).

5. Site coordinates, if available (UTM or Lat/Long):
(Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the
coordinates for each crossing of a distinct waterbody.)

6. Property size (acres): NA - Linear

7. Nearest body of water (stream/river/sound/ocean/lake): Kit Creek

8. River Basin: Cape Fear
(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/a(imin/naps/.)

9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Undeveloped forest or commercial

Page 6 of 13

10. Describe the overall project in detail, including the type of equipment to be used:
A connector road will be constructed usin.Q conventional heave equipment.
See attached 11/26/03 Withers & Ravenel letter for more details.

11. Explain the purpose of the proposed work: The purpose of the connector road is to connect
Louis Stephens with Davis Drive in order to provide access for RTP businesses. See S&EC
cover letter for further information.

IV. Prior Project History

If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.
South Loop Road will cross an unnamed tributary of Kit Creek via culverts before connecting to
Davis Drive it is a single and complete linear project.

V. Future Project Plans

Are any future pen-nit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No

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. The applicant must also
provide justification for these impacts in Section VII below. All proposed impacts, permanent
and temporary, must be listed herein, and must be clearly identifiable on an accompanying site
plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a
delineation map, whether or not impacts are proposed to these systems. Wetland and stream
evaluation and delineation forms should be included as appropriate. Photographs may be
included at the applicant's discretion. If this proposed impact is strictly for wetland or stream
mitigation, list and describe the impact in Section VIII below. If additional space is needed for
listing or description, please attach a separate sheet.

1. Provide a written description of the proposed impacts: See attached impact map and
11/26/03 Withers & Ravenel letter.

Page 7 of 13

2. Individually list wetland impacts below:

Wetland Impact Area of Located within Distance to
Site Number Type of Impact* Impact 100-year Floodplain** Nearest Stream Type of Wetland***
(indicate on ma acres (es/no linear feet)

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, fill,
excavation, flooding, ditching/drainage, ctc. For dams, separately list impacts due to both structure and flooding.
100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps
(FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or
online at http://www.fcma.l,ov.
List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, ctc.) Indicate if wetland is isolated (determination of isolation to be made by USACE only).
List the total acreage (estimated) of all existing wetlands on the property: None within
South Loop corridor.
Total area of wetland impact proposed: 0
3. Individually list all intermittent and perennial stream impacts below:

Stream Impact Length of Average Width Perennial or
Site Number Type of Impact* Impact Stream Name** of Stream Intermittent?
indicate on ma (linear feet) Before Impact (please secif
1 Culvert & rip rap 259 UT Kitt Creek 4' Perennial

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap,
dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain),
stabilization activities (cement wall, rip-rap, crib wall, gabions, cte.), 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.
Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest
downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at
www.uss-'s.M)V. Several internct sites also allow direct download and printing of USGS maps (e.g., www.topozone.coin,
www.mapgtiest.coni, ctc.).
Cumulative impacts (linear distance in feet) to all streams on site: 259'

Page 8 of 13

4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.) below:

Open Water Impact Area of Name Waterbody Type of Waterbody
Site Number Type of Impact* Impact ) (lake, pond, estuary, sound,
indicate on ma) acres (if applicable) bay, ocean, etc.

* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging,
flooding, drainage, bulkheads, etc.
5. 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., datn/embankinent, excavation, installation of
draw-down valve or spillway, etc.): N/A

Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):

Size of watershed draining to pond: Expected pond surface area:

VII. Impact Justification (Avoidance and Minimization)

Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
The connector road crosses a stream. A perpendicular crossing is proposed for the crossing,
wetland impacts were avoided. See attached 10/2/03 Withers & Ravenel letter for further
background and justification

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

Page 9 of 13

I

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
Pennits, published in the Federal Register on March 9, 2000, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
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 NCWRP concurrence shall be placed on hold as
incomplete. An applicant may also choose to review the current guidelines for stream restoration
in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at
http://li2o.cnr.state.nc.us/ncwetlands/strmgide.litml.

1. Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
Stream mitigation at a 1:1 ratio (as per Corps) will be provided at the previously approved
Mt. Vernon Springs Mitigation site. After debiting 259' for this application a balance of
232' will remain.

2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at
[phone] to determine availability and to request written approval of mitigation prior
to submittal of a PCN. For additional information regarding the application process for the
NCWRP, check the NCWRP website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of
the NCWRP is proposed, please check the appropriate box on page three and provide the
following information:

Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount of Non-riparian wetland mitigation requested (acres):

Page 10 of 13

Amount of Coastal wetland mitigation requested (acres):

IX. Environmental Documentation (required by DWQ)

Does the project involve an expenditure of public (federal/state) funds or the use of public
(federal/state) land?
Yes ® No ?

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
If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a
copy of the NEPA or SEPA final approval letter.
Yes ? No ?

X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)

It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.

Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and
Water Supply Buffer Requirements), or other (please identify.
Yes ? No ® If you answered "yes", provide the following information:

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 3
2 1.5
Total
* Zone I extends out 30 feet perpendicular from near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.

Page 11 of 13

If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation
of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or
Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as
identified within 15A NCAC 213.0242 or.0260.

XI. Stormwater (required by DWQ)

Describe impervious acreage (both 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.
Linear project

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.
Municipal sanitary sewer system

XIII. Violations (required by DWQ)

Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules?
Yes ? No

Is this an after-the-fact permit application?
Yes ? No

XIV. 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).

Page 12 of 13

Applican Agents Signature Date
(Agent's signature is Yali-d only if an authorization letter from the applicant is provided.)

Page 13 of 13

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The Department of Else Arniy
U.S. Army Corps of Enonecra
Wilmington District
VO Box 1690
WiUctington, NC 213402

Attn:
Field Officer &A K

Re: Wetlands Related Consulfing•aud Pcru1111105

To Whom It May Concern:
1, Ehc current ro rit owner, herkty deoignate zta4 authorise Soil and
lrttvimumental Consultants, Inc. to act in my bvog au tuyAgent in the processing of
permit appiicatione, to furnish upon regaett rup meptal informUinu in support of
applications, etc. front thin dayforward. This thq.- day of

This notification eupervede.s uny_previioua cocrcupondence concerning the agent for
thio Project

Print Owners Name //Ownero Signature:

cc: Mr. John Dorney
NC DEHNR-DEM
Water Quality Planning
4401 Reedy Crook Road
Raleigh, NC 27607
CG Mr. Steve Kobuu
Soil and Environmental Cun5ultantis, luck

So~illSite I:valustiiun U Mapping and Pbysical Analysls 1:3 Wctlar4Mapping and Mitigation U 1:ttvirc?itcty-wal At,41, :
On-Site'Wasto Tm4nwnt Systcros,1ryaluation and Design

ENGINEERS I PLANNERS I SURVEYORS

November 26, 2003

Kevin Martin
Soil & Environmental Consultants, Inc
11010 Raven Ridge Road
Raleigh, NC 27614
RE: Research Triangle Park Site 27 Access Road (South Loop Road)
W&R Project No. 98184

Dear Kevin:
We are writing this letter to you regarding the upcoming submittal to the USACE for the proposed
stream crossing on the above referenced project. As depicted in the wetland impact maps, the
proposed construction will impact 259 linear feet of existing stream channel. This length includes
the 86-foot roadway, fill slopes, and required inlet/outlet improvements and/or riprap dissipators.

The proposed construction at the stream crossing location will consist of a five lane divided roadway
designed in accordance with NCDOT standards and specifications using the NCDOT Highway Design
Manual (2002 edition) and the NCDOT Roadway Standard Drawings Qanuary 2002 edition). The
median width of the roadway at the proposed stream crossing is 15 feet, which will provide room for
future expansion of one additional traffic lane without additional future impacts to the stream. An
increase in traffic should be expected as the development of adjacent parcels in the RTP are
completed. Removal of the median at the stream crossing would require constricting the traffic
lanes closer together immediately prior to the Davis Drive intersection. This situation is often
referred to as "bottlenecking" and causes increased traffic congestion. Davis Drive is a major
thoroughfare that provides direct access to and from RTP, therefore, maintaining smooth traffic flow
at this intersection is vital to the transportation system in this area.
The fill slopes at the stream crossing were increased to 2:1, the maximum allowable slope per the
NCDOT Highway Design Manual. NCDOT headwalls (NCDOT Std. 838.40) were also used at both
ends of the culverts to minimize disturbance of the stream. Channel improvements and/or rip rap
velocity dissipators are proposed upstream and downstream of the culverts to create smooth ties
from the culverts to the stream channel.
We trust this letter clarifies the wetland impacts required for this project. If you have any further
questions or require further information, please feel free to give us a call.

Sincerely,

WITHERS &-RAVENEL, INC

YL 2 /fvt-~
Chris Johnson, P.E.

cc: Ms. Elizabeth H. Rooks, Research Triangle Foundation

K:\98\98.180\98184\Proj\112603.km.doc
iii MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: [phone]oo8 1 www.withersravenel.com

RTP Access - Drainage Structure No. 1 Plan: Proposed Twin 72 RCPs -One Lower 30%IA 11/26/2003
U.S. Invert at 299' - D.S. Invert at 297'
.085 .085
314
3 Legend
5 WS 01 0- ry
312- WS 10-yr
WS 50-yr
Ground
310 - Ineff
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a~
W 304-
302-

300-

298-

296 1000 1050 1100 1150 1200 1250 1300 1350 1400
Station (ft)

RTP Access - Drainage Structure No. 1 Plan: Proposed Twin 72 RCPs -One Lower 30%IA 11/26/2003
U.S. Invert at 299'- D.S. Invert at 297'

314 .085 . ~ .085
Legend
6
WS 100-yr
WS 50-yr
312
WS 10-yr
Ground
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310 I Bank Sta
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308-
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304-
302-

300-

298-1 1000 1050 1100 1150 1200 1250 1300 1350

Station (ft)

r WITHERS RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS

October 2, 2003 ~ -

Mr. Todd Tugwell
USACE Raleigh Regulatory Field Office
6508 Falls of Neuse Road, Suite 120
Raleigh, NC 27615

RE:. RTP Site 27 Access Road (South Loop Drive).
W&R Project No. 98184
Dear Todd:

This letter is in response to our meeting at your office on August 11, 2003 regarding the stream
crossing on the above referenced project. As you know, the stream crossing is located near Davis
Drive at Sta. 13+00+/- of the proposed roadway alignment. Since this project dates back a few
years we would like to give a brief summary of the permitting and design process that Research
Triangle Foundation has completed so that you may have a better understanding of the steps taken
over the course of this project.
The stream crossing on this project was delineated by Soil & Environmental Consultants, Inc. and
surveyed by W.K. Dickson. The delineation survey was approved by your office on June 28, 1999 by
Eric Alsmeyer. Following the delineation survey, Withers & Ravenel, Inc. analyzed the culvert
crossing during preliminary design of the project. Please note the preliminary hydraulic design for
the stream crossing was calculated using the NCDOT Guidelines for Drainage Studies and Hydraulic
Design, 1990 edition. Using this design, a 72" RCP was selected as the pipe size for this crossing.
Withers & Ravenel requested a cost estimate from Contech for a hydraulically equivalent bottomless
alternate. Contech recommended using a 10'X 5'-2" Structural Plate Arch Culvert and estimated the
cost to be approximately $58,500. This estimate was based on using a typical 4' X 1.5' concrete
strip footing since no geotechnical data had been provided at that time. The 72" RCP was estimated
to cost approximately $38,000, which gave approximately a $20,000 cost difference between the
tt liatrves-Follavuing the preliminary estimates, 138-E T raparad a Nationwide Permit-date
anuary 17, 2001 that included this stream crossing and other impacts for the Louis Stephens Roa
roject. The permit indicated the use of a bottomless culvert an was
aPP fft
During final design, the culvert crossing was re-analyzed by Withers & Ravenel, Inc., due to an
updated design manual from NCDOT. The new design was based on the NCDOT Guidelines for
Drainage Studies and Hydraulic Design, 1999 edition. The design methodologies for large urban
drainage areas were more conservative in the 1999 edition than the previously used 1990 edition.
It was also determined that the pipe would be designed to accommodate the storm flows of the total
build-out conditions for the existing drainage area (190 acres) so that the culvert would not require
removal/replacement prior to the life-span of the culvert. Two bottomless alternates were selected
based on the hydraulic efficiency and were further examined in this report. The first alternate was a
14' X 7' Conspan Concrete Arch Culvert. The second alternate was a 19'-5" X 6'-9" Contech Super
Span Low-Profile Arch Culvert. Contech required the use of a low profile arch due to cover
constraints of the roadway and this size was the smallest low profile arch supplied. The culvert
report including these bottomless culvert alternates was submitted to NCDOT in December 2000.
K:\98\98-180\98184\Proi\100203.tt.doc
iii MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenet.com

J•

The NCDOT Hydraulics Unit disapproved the report via letter from Randy Boyd dated December 17,
2002. The reason for disapproval was the excessive future maintenance costs of NCDOT for future
replacement of the structure compared to that of a less expensive pipe crossing.
Following the disapproval, Withers & Ravenel Inc. submitted a second culvert report, dated April
2003, which analyzed dual 72" RCP's for the culvert crossing. The dual 72" RCP's were determined
to be the hydraulic equivalent to the bottomless culverts submitted in the previous report. This
report was approved by the NCDOT Hydraulics Unit on June 16, 2003. Following the approval,
Research Triangle Foundation directed S&EC to submit for a revised permit through your office. Your
office requested a meeting of all parties to discuss the bottomless culvert alternates that were
disapproved by NCDOT.
During our meeting on August 11, an agreement was made to have geotechnical borings taken at the
culvert location so that the bottomless culvert alternates could be analyzed from a constructability
and economical standpoint. These were. the two major issues from NCDOT for disapproving a
bottomless culvert. Since our meeting, the geotechnical borings have been completed and a report
prepared by Geotechnologies, Inc. The report illustrates that partially weathered rock was found at
depths ranging from 8 feet to 12 feet below the top of the stream bank. A copy of the report has
been attached for your reference.

Following receipt of the report, Withers & Ravenel, Inc. forwarded the information to Bridgetek
(Retailer for Conspan Systems) and Contech Construction Products, Inc. for their review and to aid in
finalizing footing designs and cost estimates for the two bottomless culvert alternates that were
previously disapproved by NCDOT. Please note that during the review, Bridgetek recommended
upsizing to a 24' X 7' span for constructability. reasons to prevent disturbance of the existing stream
channel during installation. The estimated cost for this alternate increased to $232,335. The
alternate. from Contech remained a 19'-5" X 6'-9" Super Span. Low Profile Arch, however, the
estimated cost for this option was increased dramatically to $260,000. This cost increase was due
to the larger headwalls/wingwalls and a deeper footing design than was previously estimated for
the original 10' X 5-2" arch culvert analyzed during preliminary design. Please refer to the attached
cost estimates for further clarification.
We have estimated the total cost of dual 72" RCP's w/ Concrete Headwalls to be approximately
$60,000. As you can see, the cost difference compared to the preliminary design has increased
from $20,000 to approximately $200,000. Therefore, we would like to request that a revision be
allowed to the existing Nationwide Permit to allow the use of the. dual 72" RCP's. Please advise
whether your office can accommodate this request. If you have any further questions or require
additional information, feel free to give us a call. Thank you for your continued assistance on this
project..
Regards,
WITHERS &-RAVENEL, INC

aioz rs
Chris Johnson; P.E.
Cc: Elizabeth Rooks, Research Triangle Foundation
Mohammed Mahjoub, NCDOT Design Services Unit
Randy Boyd, NCDOT Hydraulics Department
Kevin Martin, Soil & Environmental Consultants, Inc.

Enclosures

K:\98\98-180\98184\Proj\100203.tt.doc

d%, 8l '1511; \ \
1
1 1 ~ \ \
1 1 \ \
1 \ \ PESEAPCH TPIANCLE FOUNDATION
1 1 °~'r - \ s \ DB 1670. PG 239 0
1 1 \ \ PIN #0736.01-48-6881
1 1 1 \ \
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\ ti CONSTRUCTION
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PRELIMINARY PLANSI
DO NOT USE FOR CO"JSTRII%'TIO^J
IMPACT SUIviIv1AR'r TABLE NOTES: (ROAD CROSSINGS) 1. WETLANDS DELINEATED BY S&EC AND
SURVEYED BY WITHERS & RAVENEL, INC.
IMPACT TYPE SF LINEAR FT. 2. EXISTING TOPOGRAPHY BASED ON SURVEY
NO. (CH and WL) (CH only) FRO".1 1.49THERS & RAVENEL, INC.
1 CH+JW 1,044 SF 259 u 50 100 15u 200
CH=CHANNEL, JW=JURISDICTIONAL WETLAND, 1 INCH _ Inn FFFT
OWI=OPEN WATER IMPACT GRAPHIC SCALE
WITHERS RAVENEL FIGURE 1 RTF'ESTTE Q-27SAHESS Wk)T SUMMARY
(SOUTH LOOP DRIVE)
RTP WAKE COUNTY NORTH CAROI INA '

PRELIMINARY PLANS
DO NOT USE FOR CONSTRUCTION

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SOUTH LOOF DRIVE

- - -
- - - - - - -
- - - -

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PARKV~AY (SR 163-

400' 200' 0 400' 800' 1200'

1 INCH = 400 FEET

NJ.
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(SOUTH LOOP DRIVE) PROPOSED WETLAND IMPACT MAPS
Checked 6/ oH~ . ~ - I . ,
ec zmn RESEARCH TRIANGLE PARK, NORTH CAROLINA

DWQ# Date k a q 03 _ Who Reviewed:

Plan Detail Incomplete
? Please provide a location map for the project.

? Please show all stream impacts including all fill slopes, dissipaters, and bank stabilization on the site plan.
? Please show all wetland impacts including fill slopes on the site plan.

? Please indicate all buffer impacts on the site plan.
? Please indicate proposed lot layout as overlays on the site plan.

? Please indicate the location of the protected buffers as overlays on the site plan.
? Please locate all isolated or non-isolated wetlands, streams and other waters of the State as overlays on the site plan.
? Please provide cross section details showing the provisions for aquatic life passage.

? Please locate any planned sewer lines on the site plan.
? Please provide the location of any proposed stormwater management practices as required by GC

? Please provide detail for the stormwater. management practices as required by GC
? Please specify the percent of project imperviousness area based on the estimated built-out conditions.

? Please indicate all stormwater outfalls on the site plan.
? Please indicate the diffuse flow provision measures on the site plan.

? Please indicate whether or not the proposed impacts already been conducted.
Avoidance and/or Minimization Not Provided
? The labeled as on the plans does not appear to be necessary. Please eliminate the or provide additional
information as to why it is necessary for this project.

? This Office believes that the labeled on the plans as can be moved or reconfigured to avoid the impacts to the
. Please revise the plans to avoid the impacts.
? This Office believes that the labeled on the plans as can be moved or reconfigured to minimize the impacts to the
. Please revise the plans to minimize the impacts.
? The stormwater discharges at the location on the plans labeled will not provide diffuse flow through the buffer because
. Please revise the plans and provide calculations to show that diffuse flow will be achieved through the entire buffer. If it
is not possible to achieve diffuse flow through the entire buffer then it may be necessary to provide stormwater management
practices that remove nutrients before the stormwater can be discharged through the buffer.
Other
? The application fee was insufficient because over 150 feet of stream and/or over 1 acre of wetland impacts were requested. Please
provide $ . This additional fee must be received before your application can be reviewed.
? Please complete Section(s) on the application.

? Please provide a signed copy of the application.
? Please provide copies of the application, copies of the site plans and other supporting information.

Mitigation
? of compensatory mitigation is required for this project. Please provide a compensatory mitigation plan. The
plan must conform to the requirements in 15 A NCAC 2H.0500 and must be appropriate to the type of impacts proposed.

? Please indicate which 404 Permit the USACE would use to authorize this project. j
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DEC 0 5 2003
WATER QUALITY SECTION

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