20020897 Ver 1_COMPLETE FILE_20020607

?O? W A T ?qP
C,0 r
Alan W. Klimek, PE, Director
Division of Water Quality
July 9, 2002
Raleigh-Durham Airport Authority
Attn: Ms. Miriam Gilkinson
P.O. Box 80001
RDU Airport, NC 27623
DWQ Project # 02-0897
Wake County
Page 1 of 2
Subject Project: Site Preparation for Taxiway L. Extension, RDU Airport, NC
PIN No. 0767324317
Unnamed tributary to Sycamore Ck. [03-04-02; 27-33-9; B NSW (Nutrient Sensitive))
APPROVAL for the use of the "General" MAJOR VARIANCE; From the Neuse, Tar-Pamlico, Randleman and
Catawba Riparian Buffer Protection Rules for expansions of and Improvements to AIRPORT FACILITIES with
ADDITIONAL CONDITIONS
Dear Ms. Gilkinson:
You have our approval, in accordance with the conditions listed below, to impact approximately 25,927 ft2 of the protected
riparian buffers for the purpose of constructing the proposed Taxiway L. Extension project as described in your application
dated June 7, 2002. This letter shall act as your approval for the use of the "General" Major Variance; From the Neuse,
Tar-Pamlico, Randleman and Catawba Riparian Buffer Protection Rules for expansions of and improvements to
AIRPORT FACILITIES with ADDITIONAL CONDITIONS as approved by the Water Quality Committee (WQC) of the
Environmental Management Commission (EMC) on April 10, 2002. In addition, you should get any other required federal,
state or local permits before you proceed with your project including (but not limited to) Sediment and Erosion Control
permits.
This approval is only valid for the purpose and design that you described in your variance request dated June 7, 2002
except as modified below. If you change your project, you must notify us and you may be required to send us a new
request for approval. If the property is sold, the new owner must be given a copy of this approval and is thereby
responsible for complying with all conditions. For this approval to be valid, you must follow the conditions listed below.
Conditions:
You are required to mitigate for impacts to the protected riparian buffers. The required area of mitigation to compensate
for impacts to the protected riparian buffers is 60,812 square feet as required under this variance approval and 15A
NCAC 26 .0242. We understand that you wish to make a payment into the Riparian Buffer Restoration Fund
administered by the NC Wetlands Restoration Program (WRP) to meet this mitigation requirement. This has been
determined by the DWQ to be a suitable method to meet the mitigation requirement. In accordance with 15A NCAC 2B
.0242(7), this contribution will satisfy our compensatory mitigation requirements under 15A NCAC 2B .0233(9)(C). Until
the WRP receives and clears your check (made payable to: DENR - Wetlands Restoration Program Office), no impacts
specified in this approval shall occur. Mr. Ron Ferrell should be contacted at [phone] if you have any questions
concerning payment into the WRP. You have one month from the date of this approval to make this payment. For
accounting purposes, this approval authorizes payment Into the Riparian Buffer Restoration Fund to
compensate for 60.812 ft2 of required riparian buffer mitigation for Impacts to 25,927 ft2 (and 220 linear feet) of
protected riparian buffers; 03-04-02 river and subbasin, 27-33-9 stream Index."
If you do not accept any of the conditions of this approval, you may ask for and 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 that conforms to Chapter
150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
NC 27699-6714. This approval and its conditions are final and binding unless you ask for a hearing.
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
North Carolina 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)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/
Page 2 of 2
This letter completes the review of the Division of Water Quality under the Neuse River Riparian Buffer Protection Rules
(15A NCAC 2B .0233 (9)(b)). Please call Mr. Bob Zarzecki at [phone] or Mr. Steve Mitchell [phone] if you
have any questions or require copies of our rules or procedural materials.
Attachments: WRP Notification Form
Cc: Steve Mitchell, DWQ Raleigh Regional Office
Ron Ferrell, Wetlands Restoration Program
File copy
Central Files
DWG) 020897
July 8, 2002
Sincerely,
W A T ?9pG
co
> y
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
NORTH CAROLINA DIVISION OF WATER QUALITY
General Variance Approval
SUMMARY OF PERMITTED IMPACTS AND MITIGATION REQUIREMENTS
In accordance with 15A NCAC 26 .0233, the Raleigh-Durham Airport Authority has permission as outlined below and
within the attached approval to impact 25,927 ft2 buffers for the purpose(s) of constructing the proposed Taxiway L.
Extension Project. All activities associated with these authorized impacts must be conducted with the conditions listed in
the attached approval. THIS APPROVAL IS NOT VALID WITHOUT THE ATTACHMENTS.
COMPENSATORY MITIGATION REQUIREMENT WETLAND RESTORATION PROGRAM (WRP)
DWQ Project No. 020897
APPROVAL DATE: July 8, 2002
LOCATION: RDU Airport
COUNTY: Wake
BAS I N/SUB BASIN : 03-04-02
STREAM INDEX NO.: 27-33-9
As required by 15A NCAC 2B.0233 and the conditions of the variance approval, you are required to compensate for the
above impacts through the restoration or enhancement of buffers as outlined below prior to conducting any activities that
impact or degrade the waters of the state and/or buffers.
60,812 fe required riparian buffer mitigation
One of the options you have available to satisfy the compensatory mitigation requirements is through the payment of a fee
to the Riparian Buffer Restoration Fund per 15A NCAC 2B .0242. If you choose this option, please sign this form and mail
it to the WRP at the address listed below. An invoice for the appropriate amount of payment will be sent to you upon
receipt of this form. PLEASE NOTE, THE ABOVE IMPACTS ARE NOT AUTHORIZED UNTIL YOU HAVE RECEIVED
NOTIFICATION THAT YOUR PAYMENT HAS BEEN PROCESSED BY THE WRP.
Signature
WETLANDS RESTORATION PROGRAM (WRP)
NC DIVISION OF WATER QUALITY
1619 Mail Service Center
Raleigh, NC 27699-1619
[phone]
Date
North Carolina 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)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.onr.state.nc.us/ncwetlands/
O?O? W A T ?9PG
O `C
Alan W. Klimek, PE, Director
Division of Water Quality

Raleigh-Durham Airport A T
Attn: Ms. Miriam Gilkinson
P.O. Box 80001
RDU Airport, NC 27623
9
y ?, 2002
IIn1
DWQ Project # 02-0897
Wake County
Page 1 of 2
Subject Project: Si - _-_, _. -Extension, RDU Airport, NC
MIN No. 0767324317
Unnamed tributary to Sycamore Ck. [03-04-02; 27-33-9; B NSW (Nutrient Sensitive)]
APPROVAL for the use of the "General" MAJOR VARIANCE; From the Neuse, Tar-Pamlico, Randleman and
Catawba Riparian Buffer Protection Rules for expansions of and improvements to AIRPORT FACILITIES with
ADDITIONAL CONDITIONS 1 l
G ortQ / 2(tz 2-
Dear Ms. Gilkinson: 9u ?
You have our approval, in accordance with the conditions listed below, to impact approxi ately 25,927 ft2 of the protected
riparian buffers for the purpose of constructing the proposed Taxiway L. Extension project.' This letter shall act as your
approval for the use of the "General" Major Variance; From the Neuse, Tar-Pamlico, Randleman and Catawba Riparian
Buffer Protection Rules for expansions of and improvements to AIRPORT FACILITIES with ADDITIONAL CONDITIONS
as approved by the Water Quality Committee (WQC) of the Environmental Management Commission (EMC) on April 10,
2002. In addition, you should get any other required federal, state or local permits before you proceed with your project
including (but not limited to) Sediment and Erosion Control permits.
This approval is only valid for the purpose and design that you described in your variance request dated June 7, 2002
except as modified below. If you change your project, you must notify us and you may be required to send us a new
request for approval. If the property is sold, the new owner must be given a copy of this approval and is thereby
responsible for complying with all conditions. For this approval to be valid, you must follow the conditions listed below.
Conditions:
You are required to mitigate for impacts to the protected riparian buffers. The required area of mitigation to compensate
for impacts to the protected riparian buffers is 60,812 square feet as required under this variance approval and 15A
NCAC 26 .0242. We understand that you wish to make a payment into the Riparian Buffer Restoration Fund
administered by the NC Wetlands Restoration Program (WRP) to meet this mitigation requirement. This has been
determined by the DWQ to be a suitable method to meet the mitigation requirement. In accordance with 15A NCAC 2B
.0242(7), this contribution will satisfy our compensatory mitigation requirements under 15A NCAC 2B .0233(9)(C). Until
the WRP receives and clears your check (made payable to: DENR - Wetlands Restoration Program Office), no impacts
specified in this approval shall occur. Mr. Ron Ferrell should be contacted at [phone] if you have any questions
concerning payment into the WRP. You have one month from the date of this approval to make this payment. For
accounting purposes, this approval authorizes payment into the Riparian Buffer Restoration Fund to
compensate for 60,812 ft2 of required riparian buffer mitigation for impacts to 25,927 ft2 (and 220 linear feet) of
protected riparian buffers; 03-04-02 river and subbasin, 27-33-9 stream Index."
If you do not accept any of the conditions of this approval, you may ask for and 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 that conforms to Chapter
150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
NC 27699-6714. This approval and its conditions are final and binding unless you ask for a hearing.
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
North Carolina 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)
919-733-1786 (phone), 919-733-6893 (fax), h"p://h2o.enr.state.nc.us/ncwetlands/
Page 2 of 2
This letter completes the review of the Division of Water Quality under the Neuse River Riparian Buffer Protection Rules
(15A NCAC 2B .0233 (9)(b)). Please call Mr. Bob Zarzecki at [phone] or Mr. Steve Mitchell [phone] if you
have any questions or require copies of our rules or procedural materials.
Sincerely,
Attachments: WRP Notification Form
Cc: Steve Mitchell, DWQ Raleigh Regional Office
Ron Ferrell, Wetlands Restoration Program
File copy
Central Files
aW
DWQ 020897
July 8, 2002
Re: Taxiway L. Extension 020897
Subject: Re: Taxiway L. Extension 020897
Date: Mon, 08 Jul 2002 07:42:28 -0400
From: Bob Zarzecki <[e-mail]>
Organization: Division of Water Quality; 401 Certification Unit
To: Steve Mitchell <[e-mail]>
CC: Cyndi Karoly <[e-mail]>
Mitchell:
They tried to get us to call it "exempt" when they are totally filling over
the buffer. They understand and have our determination in writing that these
activities are "allowable w/ mitigation" since they have removed the buffer.
I'll write the approval today w/ mitigation and pass it on to JD for his
review and signature. It should go out this week.
- Bob
Steve Mitchell wrote:
> Copy 1 Fi<ave' his no mention of rnr t igeit ion for removal. 1V Ron will accept
> and I am :;i.irr hr? is still taking all b0fer $$$$ Oh w.i rh Im, if
factors
> are cor"'roct
> BobZarzccki wrote:
>
> St-eve:
> > T left you o voice snail on this, project . 6ae received yr,u i- corrmlents orr
> > Filernahcr Yot.rr recorrunended "DFiVY???RUU 11as an aplzr-oved
> > deliii(,,it ion map that shows this Fr" t ure a:; not jurisciic<rri?uial for_
> > 10/1,'40%. 'l'lieretore, it's 0111y a 1-P utfer- iSSL10. 'T'hey Pn ae provided
> > !)8_3/'fl sl of birf-fer mitigation tor 21), 9;'7 sf of but Let imp,ict . My
> r econunencl,a t_i on is to approve th(e impact with the condl t.i on of bi.i.ffer
> > mi tigat ion. Agree?
> > -- Bob
Bob Zarzecki
NC DENR/DWQ 401 Wetlands Certification Unit
919-733-9726
of 1 7/8/02 8:15 AN
MEMORANDUM
TO: John Dorney Regional Contact: Steve Mitchell
Non-Discharge Branch WQ Supervisor:
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Taxiway L Extension
Project Number 02 0897
Recvd From APP
Received Date 6/7/02 Recvd By Region
Project Type site preperation
County Wake
County2
Region Raleigh
Certificates Stream Stream Impacts (ft.)
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req. ME
NBR Buffers OO Y O N F- 27-33-9 I NSW 30,402. 0.59 220.00 F_ F-
Mitigation Wetland
MitigationType Type Acres Feet
Is Wetland Rating Sheet Attached? Q Y O N Did you request more info? Q Y O N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N
Is Mitigation required? Q Y O N Recommendation: Q Issue p Issue/fond O Deny
Provided by Region: Latitude (ddmmss) Longitude (ddmmss)
Comments:
This is a subject stream contained in a nine exiting the tarmack at the airport. It drains into the large
sediment basin that has a significant amount of wetlans between it and the woods of Umstead. No
mention of mitigation for the remova I of the feature.
DENY?'??????
cc: Regional Office
Central Office Page Number 1
0
Date:
To: 1 R Steve Mitt ell
?FRO
?WaRO Deborah Sawyer
?WiRO Joanne Steenhuis
r'Triage Check List H}
Project Name 7:1.; Dui ??Aa?acS?b+? -?O?
DWQ Project Number
County L
?WSRO Jennifer Frye
?ARO Mike Parker
?MRO Pete t:olwell
From: &O Telephone L19) 733- q X4
The file attached is being forwarded to you for your evaluation. Please call if you need
assistance.
? Stream length impacted
? Stream determination
? Wetland determination and distance to blue-line surface waters on USGW topo maps
? Minimization/av idance issues
Buffer Ru s (Neuse, ar-Pamilco, Catawba, Randleman)
? Pond fill
? Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings?
? Cumulative impact-concerns
Comments

Ligq eta t
N`? a r'eao?c....? _ w. ?a c s??-?-??
Rc: application drop off
El
w
Subject: Re: application drop off
Date: Tt1e, 1 1 Jun 2002 11:12:52 -0400
From: Bob Zarzecki <[e-mail]>
Organization: Division of Water Quality; 401 Certification Unit
To: "gilkinson, miriam" <[e-mail]>
Miriam:
Sorry for not responding sooner. I was out of the office on Friday and
Monday. I have a copy of a general variance request dated June 7, 2002. I
assume that this is the same one. I have looked it over. It looks
complete. I have recommended to sent it to the Raleigh Regional Office for
review. We hope to get something back to you as soon as possible.
- Bob
"gilkinson, miriam" wrote:
> Bob - I have an <gpplicaLlon for, an Airport Facility GMV I would like to
> drop off. ..Two quest.-ions, (1) should I bring it to you and (2) is your_
> office still on Reedy Creek?
> Thanks much
> Miriam
> Miriam Gilkinsor, PF
Environmental Manager
> Raleigh-Durham Airport Authority
> P.O. Box 80001
> RDU Airport, NC 27623
> [phone], (,xt. 238
> FAX [phone]:1.71)
> miriam.gilk.insonClz-(Iii.(.om
Bob Zarzecki
NC DENR/DWQ 401 Wetlands Certification Unit
919-733-9726
I of 1 6/11/02 11:13 AN
Rau
John C. Brantley, Airport Director
R A L E I G H - D U R H A M A I R P O R T A U T H O R I T Y
1000 T r a d e D r i v e • P0 B o x 8 0 0 0 1 • R D U Airport, NC 2 7 6 2 3
tel: [phone] • fax
June 7, 2002
Mr. Bob Zarzecki
Division of Water Quality
401/Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27669-1650
iv8p
E9
(91 9) 840-01 75 www.rdu.com
Q
p
'
0&9
RE: General Major Variance Request for Site Preparation for Taxiway L Extension, Raleigh-
Durham International Airport
Dear Mr. Zarzecki:
The Raleigh-Durham Airport Authority (Authority) submits three copies of the most recent
version of the joint Corps of Engineers and Division of Water Quality Preconstruction
Application Form (PCN) to request a General Major Variance ("GMV") from the Rules Neuse
River Basin Riparian Buffer Protection (15A NCAC 2B .0233) for impacts to protected riparian
buffers for the above-referenced project, a "Covered Airport Project" at the Raleigh-Durham
International Airport. The Authority makes this submittal pursuant to and in accordance with the
General Major Variance recently adopted by the Environmental Management Commission, using
the PCN because the GMV Form is not yet available.
The Site Preparation for Taxiway L Extension Project (the Project) is not subject to the
requirements of the "No Practical Alternatives" test under the Water Supply Rule or the 401
Rules. Therefore, the Project is deemed to meet the No Practicable Alternatives Provisions of
the buffer rules, and the Authority requests that DWQ issue an authorization certificate for buffer
rule approval based on the submittal of the enclosed documents. Further, as the Authority seeks
written Buffer Rule approval only, no application fees apply.
If you have any questions or need additional information, please call me at [phone],
extension 238.
Sincerely,

Miriam Gilkinson, P.E.
Environmental Manager
Enclosure
cc: Charles Case, Hunton & Williams
DURHAM RALEIGH DURHAM COUNTY WAKE COUNTY
Kenneth D. Gibbs, Sr., Chairman David T. Clancy, Vice-Chairman W. Stephens Toler, Treasurer J. Ray Sparrow, Secretary
Robert D. Teer, Jr. Robert W. Winston Lionell Parker R. David Lane
Office Use Only: Form Version February 2002
USACE Action ID No. DWQ No.
If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than
leaving the space blank.
1. Processing
1. Check all of the approval(s) requested for this project:]
Section 404 Permit
Section 10 Permit
401 Water Quality Certification
® Riparian or Watershed Buffer Rules
*Covered Airport ProJjectPer the Airport General Major Variance.
2. Nationwide, Regional or General Permit Number(s) Requested: Not Applicable
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: El
4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for
mitigation of impacts (see section VIII - Mitigation), check here:
II. Applicant Information
1. Owner/Applicant Information
Name: Raleigh-Durham Airport Authority
Mailing Address: ATTN: Miriam Gilkinson
P.O._Box 80001
RDU Airport, NC 27623
Telephone Number: 919-840-2100 x 238 Fax Number: 919-840-0175
E-mail Address: [e-mail]
2. Agent 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: Not Applicable
Company Affiliation:
Mailing Address:
Telephone Number:
E-mail Address:
III. Project Information
Fax Number:
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: Site Preparation for Taxiway L Extension
2. T.I.P. Project Number or State Project Number (NCDOT Only): Not Applicable
3. Property Identification Number (Tax PIN): 0767324317
4. Location
County: Wake County Nearest Town: Not Applicable
Subdivision name (include phase/lot number): Not Applicable
Directions to site (include road numbers, landmarks, etc.): General Aviation Area at the
Raleigh-Durham International Airport. From Highway 70 (Glenwood Ave), exit at Westgate
Road. Enter the Airport on Commerce Drive (becomes International Drive). Pass the remote
Park and Ride Lots 5 and 4; turn left on Executive Drive. See Attachment 1 (Vicinity Map)
and Attachment 2 (Site Plan).
5. Site coordinates, if available (UTM or Lat/Long): -UTM 17 700456E 3973083N
(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. Describe the existing land use or condition of the site at the time of this application:
The existing land use is airport/industrial. The project site is in a developed area on airport
property, adjacent to the project area for Taxiway J. Other airport development previously
disturbed the project area, which is currently relatively steeply graded maintained grasslands.
7. Property size (acres): The Raleigh-Durham International Airport occupies more than 5,000
acres. This site preparation project would disturb an area approximately one acre in size, and
would revegetate the area (with the types of maintained grassland that is at the site today)
following grading, pending future development in the vicinity.
8. Nearest body of water (stream/river/sound/ocean/lake): Stormwater basin "004," which
outfalls to an unnamed tributary of Sycamore Creek.
9. River Basin: Neuse River.
(Note - this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.)
10. Describe the purpose of the proposed work:
The primary purpose of this project is to perform site preparation (filling and grading) for the
second phase of the extension of Taxiway L. The first phase of Taxiway L extension will
Page 2 of 10
connect Taxiways J and L. The second phase of Taxiway L extension will provide access to
the planned Air Cargo Complex from the intersection of Taxiways J and L, as shown on the
Airport Layout Plan (ALP) in Attachment 3. The second phase of Taxiway L extension will
require a significant amount of earthwork and grading because of the existing topography
north and east of the intersection of Taxiways J and L.
This project is intended to avoid the significant operational issues and safety concerns that
would arise if site preparation for the second phase of Taxiway L extension were deferred
until the construction of the Air Cargo Complex, at which point Taxiways J and L will be
heavily-used, active taxiways. FAA Advisory Circular 150/5370-2D, Operational Safety on
Airports During Construction, sets forth the guidelines for ensuring operational safety during
periods of construction. These guidelines mandate that all personnel and equipment
operating in an active taxiway safety area must be mobile and moved out of the area for each
passing aircraft. It will not be feasible to remove personnel and equipment from the area of
the second phase Taxiway L extension construction site for every aircraft using Taxiway J,
which will be the only cross-field taxiway at the north end of the airport. Therefore, the
presence of the construction operations will require closure of Taxiways J and L. Short-term
closures of Taxiways J and L necessary to build the second phase of Taxiway L extension
will be manageable; longer-term closures that would be necessary allow access for
equipment to fill and grade the site and then build the second phase of Taxiway L extension
are not feasible. In other words, deferring site preparation for the second phase of Taxiway L
extension would severely disrupt operation of the Airport due to FAA requirements to ensure
safety in areas of construction. By completing this project and performing second phase
Taxiway L extension site preparation activities before Taxiway J is an active taxiway, the
Authority will minimize these operational conflicts and safety concerns.
The elevation difference between the future edge of the second phase Taxiway L extension
safety area and the existing stormwater channel into the stormwater retention basin is
approximately 40 feet. The distance between the future edge of the second phase Taxiway L
extension safety area and the edge of the stormwater retention basin is approximately 130
feet. FAA Advisory Circular (AC) 150/5300-13, Airport Design, includes dimensional
design standards for taxiways, including taxiway shoulders and taxiway safety areas. For
Airplane Design Group IV aircraft, the width of a taxiway and its shoulder and safety area is
171 feet. Beyond that width, this AC recommends a maximum fill slope of 4:1 in order to
minimize the risk to aircraft that might leave the taxiway and shoulder.
Therefore, in anticipation of these design standards, it is necessary to pipe the existing length
of stormwater channel (approximately 220 feet) to perform site preparation for the second
phase Taxiway L extension. Although the existence of the stormwater retention basin
precludes achieving a 4:1 slope, piping the channel to the edge of the stormwater retention
basin will create sufficient room for an approximate 3:1 slope. Piping this length of
stormwater channel will significantly reduce the steepness of the slope that would otherwise
be required, thereby minimizing the risk to aircraft that might stray from the taxiway surface.
The Authority anticipates that the FAA would accept a request for a waiver of the design
standard in this instance.
As a secondary benefit of the project, these site preparation activities would eliminate some
non-standard slopes that currently exist on the north and northeastern edges of the current
Page 3 of 10
design for the area of the intersection of Taxiway J and the Taxiway L extension. This area
was designed and approved prior to adoption by the Environmental Management commission
of the Airport General Major Variance (GMV). Because the GMV was not then available,
the design includes very steep slopes in order to avoid impacts to Zone 1 surrounding the
stormwater retention basin area and to limit the grading and revegetating activities in Zone 2
of that basin area. Although approved by the FAA, these non-standard shoulder slopes
located at a relatively sharp curve in the future Taxiway J present a safety concern to aircraft
on the taxiway. Site preparation for the second phase Taxiway L extension ameliorates this
situation and increases the margin of safety of aircraft maneuvering on Taxiways J and L.
11. List the type of equipment to be used to construct the project: The project includes
earthwork, drainage, and erosion control. The project requires construction equipment
necessary to perform these functions.
12. Describe the land use in the vicinity of this project: The land in the immediate vicinity of
the project is generally airport/industrial land use, including access roads and the Airport
General Aviation Area.
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.
The Authority has not requested jurisdictional determinations or permits for this project.
However, the Authority has an Airport-wide jurisdictional determination plat (Action ID
19921400, signed by the Corps September 27, 1999) that includes the project area. Attachment 4
provides a copy of the section of the plat that includes the project area. The Corps determined
that the stormwater retention basin is "waters of the United States" and that a stormwater
drainage channel between the pond and a pipe that is part of the Authority stormwater system is
not .jurisdictional. The Division of Water Quality determined that the stormwater drainage
channel and stormwater retention pond both are subiect to the Neuse Rules.
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
The December 1994 Long-Range Planning Committee Report on Master Plan Alternatives -fo
Raleigh-Durham International Airport. Volume I - Master Plan Alternatives ("Master Plan")
contemplates future development of the immediate area. The proposed project, which partially
prepares the site for that development, is consistent with the Master Plan.
The Authority anticipates that the future development of the area may require permits. However,
although the 1994 Master Plan includes extension of Taxiway L and construction of a cargo area,
Page 4 of 10
that development is not yet in the pre-design phase. Therefore, insufficient information is
available and it is not viable to include that work in this application, because the extent of
impacts and need for permits are unknown.
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 brief written description of the proposed impacts:
The project would not impact wetlands or waters of the United States. The project would
impact riparian buffer (both Zone 1 and Zone 2) along the stormwater drainage channel.
The project would convert a length of an open stormwater drainage channel to piped flow
between an existing 78-inch stormwater pipe and downstream stormwater retention basin.
This ephemeral or intermittent drainage channel delivers flow from the stormwater system to
the basin. This open stormwater drainage is not a jurisdictional water of the United States
(see Attachment 4). The project will not disturb the existing stormwater retention basin,
which the Corps has classified jurisdictional.
The riparian buffer impacts would be to both Zone 1 and Zone 2 buffer, along the entire
length (approximately 220 feet) of the drainage channel, which DWQ determined to be a
subject feature. Riparian buffer impacts to Zone 2 of the riparian buffer around the
stormwater retention pond might occur, depending on site geometry and FAA approval of a
waiver of the maximum 4:1 fill slope design standard. Impacts would be limited to grading
and revegetating. The project is to regrade the area as site preparation; therefore, although
the project would alter the topography in the vicinity, the project would not add impervious
surface and would revegetate the entire disturbed buffer with the same type of grass that
exists today. Another project (construction of the Air Cargo Complex) would add
impervious surface.
Page 5 of 10
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 map) (acres) (yes/no) (linear feet)
None
* List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, fill,
excavation, flooding, ditching/drainage, etc. 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.fema.gov.
*** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond,
Carolina Bay, bog, etc.)
List the total acreage (estimated) of all existing wetlands on the property: Not determined
Total area of wetland impact proposed: None
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 map) (linear feet) Before Impact (please specify)
Stormwater drainage

I
Piping Approx. leading to SDO 004,
2 feet Ephemeral or
220 ft upstream of UT of Intermittent
Sycamore Creek
* 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, etc.), excavation, ditching/straightening, etc. If stream relocation is
proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included.
** 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.usgs.gov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com,
www.mapquest.com, etc.).
Cumulative impacts (linear distance in feet) to all streams on site: Approximately 220 feet
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 )
(if applicable) (lake, pond, estuary, sound,
(indicate on map) (acres) bay, ocean, etc.)
None
* 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 Not Applicable
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): 0 uplands E] stream E] wetlands
Page 6 of 10
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
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.
Not applicable: "Covered Airport Project" eligible for Airport Facilities General Major Variance.
As noted in the FAA filing, the project will be designed and, if approved, constructed so as to
minimize any impacts on buffers and waters.
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on 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://h2o.enr.state.nc.us/ncwetiands/strmgide.html.
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 (acreaW/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
Page 7 of 10
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
No mitigation proposed for stream impacts. The text above states "In accordance with 15A
NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for
projects involving greater than or equal to one acre of impacts to freshwater wetlands or
greater than or equal to 150 linear feet of total impacts to perennial streams." The project
does not impact a perennial stream; rather, it affects an existing stormwater drainage channel
that carries stormwater collected in the Authority's stormwater system.
Through implementation of this project, the Authority would maintain a present and ongoing
existing use (maintained grassland), an exempt activity under the Neuse Rules. Therefore,
while the Authority respectfully requests that you consider that the appropriate category of
use for the project is "exempt," not "allowable with mitigation," in the interest of expediting
review of this request for a GMV for the project, the Authority proposes payment into the
Riparian Buffer Restoration Fund. See Section X.
2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration
Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that
you would like to pay into the NCWRP. Please note that payment into the NCWRP must be
reviewed and approved before it can be used to satisfy mitigation requirements. Applicants
will be notified early in the review process by the 401/Wetlands Unit if payment into the
NCWRP is available as an option. 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): None
Amount of buffer mitigation requested (square feet): 25,927 ft (see Section X)
Amount of Riparian wetland mitigation requested (acres): Not Applicable
Amount of Non-riparian wetland mitigation requested (acres): Not Applicable
Amount of Coastal wetland mitigation requested (acres): Not Applicable
IX. Environmental Documentation (DWQ Only)
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 E] No R Not Applicable
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 F-] Not Applicable
Page 8 of 10
X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only)
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 213 .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
(square feet) Multiplier Required
Mitigation
1 14,614 3 $42,087
2 11,313 1.5 $16,291
Total 25,927 $58,378
Lone i extenas out su feet perpenoicuiar from near nanK or cnannei; /-one t extenas an
additional 20 feet from the edge of Zone 1.
411 'V
.310 8'
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 2B .0242 or .0260.
Throueh implementation of this oroiect, the Authoritv would maintain a present and onaoin
existing use (maintained grassland), an exempt activity under the Neuse Rules. Therefore, while
the Authority respectfully requests that you consider that the appropriate category of use for the
project is "exempt," not "allowable with mitigation," in the interest of expediting review of this
request for a GMV for the project, the Authority proposes payment into the Riparian Buffer
Restoration Fund. Information used to calculate the above impacts is in Attachment 5.
XI. Stormwater (DWQ Only)
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.
The project will not add impervious surface.
Stormwater from this drainage basin flows through the stormwater system to the existing
stormwater retention basin "SDO 004" via several large pipes. The Authority installed SDO 004
in the early 1990s as an element of the North Cargo Ramp development. The Authority
Page 9 of 10
constructed this pond as a permanent facility for water quality and peak flow reduction for the air
cargo complex. The pond design accommodated the ultimate development of the RDU cargo
complex and the associated changes in character and size of the watershed. Post-development
assumptions included all long-range plans for taxiways, roadways, and aprons.
The project would include necessary erosion and sediment control measures.
XII. Sewage Disposal (DWQ Only)
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.
The proposed project will not generate wastewater. The presence of workers at the project sight
may add a minor amount of domestic wastewater to the Raleigh-Durham Airport Authority
collection system, which discharges sanitary wastes to the Town of Cary, under a Wastewater
and Sewer Agreement.
XIII. Violations (DWQ Only)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes F1 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).
Applicant/Agent's Signature Date
(Agent's signature is valid only if an authorization letter from the applicant is provided.)
ATTACHMENTS
Attachment I Vicinity Map
Attachment 2 Site Plan
Attachment 3 Airport Layout Plan (partial)
Attachment 4 Jurisdictional Determination
Attachment 5 Calculation of Buffer Impacts
Page 10 of 10
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ATTACHMENT 1
Site Vicinity Map
Site Preparation for Taxiway L Extension
Raleigh-Durham International Airport
June 7, 2002
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ATTACHMENT 2
Site Plan
Site Preparation for Taxiway L Extension
Raleigh-Durham International Airport
June 7, 2002
Please see attached.

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Airport Layout Plan
Site Preparation for Taxiway L Extension
Raleigh-Durham International Airport
June 7, 2002
Please see attached.
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ATTACHMENT 4
Jurisdictional Determinations
Site Preparation for Taxiway L Extension
Raleigh-Durham International Airport
June 7, 2002
Please see attached plat, Action ID 19921400.
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U.S. ARMY CORPS OF ENGINEERS
Wilmington District
Action ID: 199921400 County: Wake
NOTIFICATION OF JURISDICTIONAL DETERMINATION
Property
Owner Raleigh-Durham Airport Authority
Attn: Mr. Ellis Canton, Assistant Airport Engineer
Address Post Office Box 80001
RDU Airport, NC 27623
Telephone Number 919-840-2100
Size and Location of Property (waterbody, Highway name/number, town, etc.): The property is
located between I-40 and US 70, approximately 10 miles northwest of Raleigh, in Wake County, North
Carolina. The site is adjacent to several tributaries of Crabtree Creek, above and below headwaters, in the
Neuse River Basin.
Indicate Which of the Following Apply:
There are waters of the U.S., to include wetlands, on the above described property which we strongly suggest
should be delineated and surveyed. The surveyed wetland lines must be verified by our staff before the Corps will
make a final jurisdictional determination on your property.
Because of the size of your property and our present workload, our identification and delineation of your wetlands
cannot be accomplished in a timely manner. You may wish to obtain a consultant to obtain a more timely
delineation of the wetlands. Once the consultant has flagged a wetland line on the property, Corps staff will
review it, and, if it is accurate, we strongly recommend that you have the line surveyed for final approval by the
Corps. The Corps will not make a final jurisdictional determination on your property without an approved survey.
X The waters of the U.S., to include wetlands, on your lot have been delineated, and the limits of the Corps
jurisdiction have been explained to you. Unless there is a change in the law or our published regulations, this
determination may be relied upon for a period not to exceed five years from the date of this notification.
There are no waters of the U.S., to include wetlands, present on the above described property which are subject to
the permit requirements of Section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law
or our published regulations, this determination may be relied upon for a period not to exceed five years from the
date of this notification.
X This project is located in the Neuse river basin. You should contact the North Carolina Division of Water Quality
at [phone] to determine additional requirements specific to this river basin.
Placement of dredged or fill material in wetlands on this property without a Department of the
Army Permit is in most cases a violation of Section 301 of the Clean Water Act (33 USC 1311). A
permit is not required for work on the property restricted entirely to existing high ground. If you
have any questions regarding the Corps of Engineers regulatory program, please contact
Todd Tug_well at telephone number (919) 876 - 8441 extension 26
Project Manager Signa
Date September 27, 1999 Expiration Date September 27, 2004

SURVEY PLAT OR FIELD SKETCH OF THE DESCRIBED PROPERTY AND THE WETLAND
DELINEATION FORM MUST BE ATTACHED TO THE YELLOW (FILE) COPY OF THIS FORM.
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ATTACHMENT 5
Calculation of Buffer Impacts
Site Preparation for Taxiway L Extension
Raleigh-Durham International Airport
June 7, 2002
Please see attached diagram.
Length of channel proposed for piping: 220 feet
Area of Zone 1 buffer proposed project would impact: 14, 614 square feet
Area of Zone 2 buffer proposed project would impact: 11,313 square feet
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