20061579 Ver 2_Application_20070115

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STATE OF NORTH CAROLINA
DEPAR'T1V~NT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
January 9, 2007
U. S. Army Corps of Engineers
Regulatory Field Office
Post Office Box 1000
Washington, NC 27889-1000
Attention: Mr. William Wescott
NCDOT Coordinator
Dear Sir:
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LYNDO TIPPETT
SECRETARY

Subject: Nationwide 23 Permit Modification Request, for the proposed
replacement of Bridge 74 on SR 1615 over Branch Upper Broad Creek
(Morgan Swamp) in Craven County. Federal Aid Project No. BRSTP-
1615.(2), State Project No. 8.2171301, TIP No. B-4088.
Reference: USACE Action ID 2006-41531-125
The North Carolina Department of Transportation proposes to modify the construction
plans for the subject project. Permanent impacts to jurisdictional waters will not change
by use of these modifications; however, an additional temporary wetland impact of 0.025
acre is necessary for the installation of erosion control devices within areas permitted as
"hand-clearing". These devices will include a combination of standard Temporary Silt
Fence, Special Sediment Control Fence - wire/hardware cloth fencing with sediment
control stone (see attachment), and Temporary Rock Silt Checks Type-A with filter fabric
under the rock checks to allow recovery of the stone.
Thank you for your time and assistance with this project. Please contact Tyler Stanton at
[e-mail] or [phone] if you have any questions or need additional
information.
Sincerely,
Gregory J. Thorpe, Ph.D.
Environmental Management Director, PDEA
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRAN9PORTATIDN FAX: [phone] TRANSPORTATION BUILDING
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 1 SOUTH WILMINGTON STREET
1548 MAIL SERVICE CENTER WEBSITE: WWW.NCDOT.ORG RALEIGH NC
RALEIGH NC 27699-1548

Cc:
Mr. John Hennessy, NCDWQ
Mr. Travis Wilson, NCWRC
Mr. Gary Jordan, USFWS
Mr. Ron Sechler, NMFS
Mr. Michael Street, NCDMF
Mr. Steve Sollod, NCDCM
Ms. Tere Barrett, District Manager, NCDCM
Dr. David Chang, P.E., Hydraulics
Mr. Greg Perfetti, P.E., Structure Design
Mr. Mark Staley, Roadside Environmental
Mr. C. E. Lassiter, P.E., Division 2 Engineer
Mr. Jay Johnson, Division 2 Environmental Officer
W/o attachment
Mr. Scott McLendon, USACE, Wilmington
Mr. Jay Bennett, P.E., Roadway Design
Mr. Majed Alghandour, P. E., Programming and TIP
Mr. Art McMillan, P.E., Highway Design
Mr. Bill Goodwin, P.E., PDEA
NCDOT TIP B-4088 Page 2 of 2

Temporary Fill in Wetlands for Erosion & Sediment Control Measures:
The areas permitted for Mechanized or Hand Clearing in Wetlands on this project will
include zones for Temporary Fill in Wetlands for Erosion & Sediment Control Measures.
The Erosion and Sediment Control Measures that are considered temporary fill includes
Special Sediment Control Fence and/or Temporary Rock Silt Check(s) Type A.
Special Sediment Control Fence:
Special Sediment Control Fence shall be placed as shown on the plans or as directed by
the Engineer. The Special Sediment Control Fence shall consist of steel posts, '/ inch
hardware cloth, and sediment control stone. The sections of Special Sediment Control
Fence shall serve as drainage outlets for Silt Fence and each section shall not exceed 10
ft. (3 m) in length .and 2 ft. in width (0.6 m).
Materials:
(A) Posts:
Steel posts shall be at least 5 feet (1.5 m) in length, approximately 1 3/S inches (35 mm)
wide measured parallel to the fence, and have a minimum weight of 1.25 lb/ft (1.86 kg/m)
of length. The post shall be equipped with an anchor plate having a minimum area of
14.0 square inches (9000 square millimeters), and shall have a means of retaining wire in
the desired position without displacement.
(B) 1/4 inch (6.4mm) Hardware Cloth:
Hardware cloth shall have 1/4 inch (6.4mm) openings constructed from #24 gauge wire.
The hardware cloth shall be installed according to Standard Drawing No. 1606.01 with a
minimum of 2 ft. (0.6m) of the cloth placed on the ground beneath the Sediment Control
Stone.
(C) Sediment Control Stone:
Sediment control stone shall meet the requirements of Section 1005 of the 2002 Standard
Specifications for Roads and Structures. Install stone according to Standard Drawing No.
1606.01.
Maintenance and Removal:
The Contractor shall maintain the special sediment control fence until the project is
accepted or until the fence is removed. The Contractor shall remove and dispose of silt
accumulations at the fence when so directed by the Engineer in accordance with Section
1630 of the 2002 Standard Specifications for Roads and Structures. The special sediment

control fence shall be removed at the completion of the project, and any earth disturbance
inside the Mechanized Clearing area shall be seeded with native grasses.
Temporary Rock Silt Check Type A:
Temporary Rock Silt Checks Type A shall be placed as shown on the plans or as directed
by the Engineer. The Type A Checks will be rock dams constructed of Class B stone,
with sediment control stone placed on the flow side, and filter fabric underneath.
Temporary Rock Silt Checks Type A shall serve as drainage outlets for Silt Fence and
shall be constructed according to Standard Drawing No. 1633.01.
Materials:
(A) Class B Stone:
Class B stone shall meet the requirements of Section 1005 of the 2002 Standard
Specifications for Roads and Structures. Install stone according to Standard Drawing No.
1633.01.
(B) Sediment Control Stone:
Sediment control stone shall meet the requirements of Section 1005 of the 2002 Standard
Specifications for Roads and Structures. Install stone according to Standard Drawing No.
1633.01.
(C) Filter Fabric:
The filter fabric shall meet the requirements of Type 2 in Section 1056 of the 2002
Standard Specifications for Roads and Structures. The filter fabric shall be placed on the
ground beneath the Temporary Rock Silt Check Type A.
Maintenance and Removal:
The Contractor shall maintain the Temporary Rock Silt Checks Type A until the project
is accepted or until the dam is removed. The Contractor shall remove and dispose of silt
accumulations at the Type A Check when so directed by the Engineer in accordance with
Section 1630 of the 2002 Standard Specifications for Roads and Structures. The
Temporary Rock Silt Checks Type A shall be removed at the completion of the project,
and any earth disturbance inside the Mechanized Clearing area shall be seeded with
native grasses.

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j = ENGLISH STANDARD DRAWING FOR 7- 6 STATE OF
o ~ SPECIAL SEDIMENT CONTROL FENCE NORTH CAROLINA
O~ j DEPT. OF TRANSPORTATION
~ ~ DIVISION OF HIGHWAYS
o RALEIGH, N.C.