20050785 Ver 8_Modifications_20080201

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STATE OF NORTH CAROLINA
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DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
January 14, 2008
U.S. Army Corps of Engineers
Regulatory Field Office
Post Office Box 1000
Washington, North Carolina 27889-1000
N. C. Dept of Env. and Natural Resources
Division of Water Quality
Washington District Office
943 Washington Square
Washington, North Carolina 27889
LYNDO TIPPETT
SECRETARY
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N. C. Dept of Env. and Natural Resources
Division of Coastal Management
Washington District Office
943 Washington Square
Washington, North Carolina 27889
ATTN: Mr. William Wescott, USACE NCDOT Coordinator
Mr. Steven Lane, DCM NCDOT Coordinator
Mr. Garcy Ward, DWQ NCDOT Coordinator
Dear Sirs:
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Subject: Request for Modification of 404 Individual Permit, 401 Water Quality
Certification Permit, Tar-Pamlico Buffer Authorization, and Letter of
Refinement for CAMA Major Development Permit for the proposed
Washington Bypass. US 17 from South of SR 1149 (Price Road.) to US 17
North of SR 1509 (Springs Road.). TIP Number: R-2510B, Federal Aid
Project MAF-75-3(26). Debit $475 for WQC Modification and $100 for
CAMA Modification from WBS Element No. 34440.1.1
Reference: USACE Action ID 199301143
DWQ Project No. 050785, WQC No. 3527
The North Carolina Department of Transportation (NCDOT) is requesting a modification
to Permit No. 199301143 for wetland and surface water impacts associated with R-
2510B. The following presents revised impact calculations for stream and Tar-Pamlico
River buffer impacts at Site 11. Preliminary design proposed the use of a retaining wall
in this location to minimize stream and buffer impacts. However, as detailed design on
the wall has progressed it has been determined that use of a retaining wall is not feasible.
Included in this package are revised stream and Tar-Pamlico River buffer impact
calculations and revised drawings for Site 1 1.
The revised design does not compromise NCDOT's compliance with the existing permit
conditions. The revision has been evaluated for compliance with the
avoidance/minimization criteria and is in compliance with all previous issues, including
the following:
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION 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

• Protected Species
• Aquatic Life passage
• FEMA compliance
• Cultural Resources
Summary of Changes
The following permit modification addresses impacts at Site 11. Extension of the
driveway culvert will impact 58 linear feet of stream and 0.01 acres of surface water.
Additional increases to Tar-Pamlico River buffer impacts consist of 1,628 square feet of
impacts in Zone 1 and 610.5 square feet of impacts in Zone 2. There are no changes to
impacts to Jurisdictional wetlands.
General Proiect Description
The NCDOT proposes to improve existing US 17 to a high speed, multi-lane highway
that bypasses the City of Washington. R-2510B will include the relocation or widening of
approximately 6.8 miles of US 17, starting within Beaufort County, from south of Price
Road (SR 1149) south of Chocowinity, and ending north of Springs Road (SR 1509)
north of Washington. The proposed roadway will be a four-lane, divided highway, with
grass shoulders and ditches, and a 46-foot wide grassed median. The median will be
reduced to a 10-foot median divided by a barrier on the 2.89 mile four-lane freeway
bridge that will span the Tar River and the frequently inundated forested wetlands
adjacent to the Tar River. The project is located in the Tar-Pamlico River Basin with a
Hydrologic Unit Code of 03020104.
Summary of Impacts to Waters of the U.S.
Proposed impacts to jurisdictional areas of R-2510B consist of 7.92 acres of wetlands,
0.39 acre of surface waters, and 2,426 linear feet of stream channels. Wetland impacts
consist of 6.04 acres of riverine wetlands and 1.88 acres ofnon-riverine wetlands.
PERMITTING ACTIVITY TO DATE
Clean Water Act Section 404 Individual Permit
The project received a Clean Water Act Section 404 Individual Permit (USAGE Action
ID # 199301143) from the U.S. Army Corps of Engineers (USAGE) Wilmington District
on November 28, 2005. The original Individual Permit application was dated May 3,
2005 and a Revised Individual Section 404 Permit Application was submitted on August
5, 2005. This permit authorized construction for Section R-2510A, and stipulated that
construction on R-2510B should not begin until final design had been completed and
plans had been approved by the District Engineer. A permit modification for revised
impacts based on detailed design for R-2510B was submitted on November 13, 2006. On
January 17, 2007 the USAGE issued a permit modification. A second permit
modification was submitted on June 4, 2007, to cover minor changes observed during
final design. A third permit modification was submitted on July 2, 2007 for additional
wetland clearing at Site 6 associated with the temporary use of Shuggart Swamp Mats and
slightly wider clearance limits for the southern portion of the main bridge. On August 7,
2007, the USAGE issued a permit modification for both the June 4 and July 2, 2007
requests.
2

Section 401 Water Quality Certification
The project received a Section 401 Water Quality Certification (DWQ Project No.
050785, WQC No. 3527) from the North Carolina Department of Environment and
Natural Resources, Division of Water Quality (NCDWQ) on September 6, 2005. The
original application for an Individual 401 Water Quality Certification is dated May 3,
2005 and an Application Resubmittal is dated August 5, 2005. A permit modification for
revised impacts based on detailed design for R-2510B was submitted on November 13,
2006. On February 13, 2007 the NCDWQ issued a modification of Certification 3527. A
second permit modification was submitted on June 4, 2007, to cover minor changes
observed during final design. A third permit modification was submitted on July 2, 2007
for additional wetland clearing at Site 6 associated with the temporary use of Shuggart
Swamp Mats and slightly wider clearance limits for the southern portion of the main
bridge. A modification of Certification No. 3527 with additional permit conditions was
issued by DWQ on August 2, 2007.
Coastal Area Management Act (CAMA) Major Development Permit
A Consistency Certification was issued by North Carolina Department of Environment
and Natural Resources Division of Coastal Management (DCM) on October. 31, 2005.
The proposed R-2510B section impacts the Public Trust Area and Public Trust Shoreline
CAMA AECs where it crosses the Tar River. A CAMA Major Development Permit
Application was submitted to DCM on November 13, 2006. A permit was issued by
DCM on March 6, 2007. The DCM issued a Letter of Refinement on August 6, 2007 for
requested modifications associated with Permit Modification 2 and 3 described above.
JURISDICTIONAL IMPACTS
The attached permit modification package includes drawings depicting jurisdictional
impacts for R-2510B at Site 11.
Preliminary design for widening the existing road at this location proposed the use of a
retaining wall to minimize stream and buffer impacts. However, as detailed design on the
wall has progressed, it has been determined that there is not sufficient space between the
proposed edge of road and existing stream for placement of a retaining wall. At this
location the stream is running parallel to the road. To construct the retaining wall, it
would be necessary to place fill material at the base of the wall to protect the wall from
scour. The NCDOT requires the use of a 3:1 slopes throughout the project. The existing
bank slope along this reach is about vertical (greater than 1:1). Use of a 3 :1 slope would
require the relocation of the channel away from the base of the wall as well as extend the
top of the far bank beyond the existing right-of--way limits. Therefore, the use of a
retaining wall was determined not to be feasible. Use of a culvert was determined to be
the only practicable alternative. Also, due to the proximity of the channel to the edge of
the road, culverting the channel improved road safety.
Wetlands
There are no wetlands at Site 11. Therefore, there are no changes to Jurisdictional
wetland impacts due to this permit modification.
3

Streams
Placement of the proposed culvert extension will impact an additional 58 feet (0.01 acres)
for total stream impacts of 24261iner feet and 0.39 acres of surface waters.
Table 1. Proposed Jurisdictional Impacts

Site
Station Number
(from/to) Fill in

Wetland
(ac) Excavation
in
Wetlands

ac Mechanized
Clearing -
Method III

ac Surface
Water
Impacts

ac Existing
Channel
Impacted

ft
1 -L- 228+08 0.11 0.02 0.02 -170
2 Site 2 has been avoided.
3 -L- 251+10 1.00 0.45 0.06 363
4 -L- 269+74 2.04 0.03 0.16 0.07 484
5 -L- 315+20 0.15 0.02
6 -L- 324+02/476+76 0.24 0.05 1.83
7 -L- 497+90 1.56 0.18 1,147
8 -L- 507+50 RT No wetland or stream im acts at this site.
9 -L- 515+10 0.10 0.01 0.05 204
10 -L- 525+00 LT 0.13 0.02
11 -Y22- 28+00/32+00 No wetlands at this site 0.01 58
Total 5.33 0.08 2.51 0.39 2426
Riparian Buffers
Impacts to Tar-Pamlico riparian buffer will increase at Site 11 due to the placement of the
culvert, by 1,628 square feet in Zone 1 and 610.5 square feet in Zone 2. Total impacts
consist of 231,995.8 square feet of buffer in Zone 1 and 142,982.3 square feet of buffer in
Zone 2.
Table 2. Riparian Buffer Impacts
Site Zone 1
(sq ft) Zone 2
(sq ft) Wetlands
in Zone 1
(sq ft) Wetlands
in Zone 2
(sq ft) Mitigation
Required
Zone 1
s ft Mitigation
Required
Zone 2
s ft
1 11,774.5 7,951.6 5,350.8 0.0 6,423.7 7,951.6
2 Site 2 has been avoided.
3 27,846.2 16,695.9 24,339.3 14,777.6 3,506.9 1,918.3
4 30,705.3 18,371.3 30,244.9 13,698.0 460.4 4,673.3
6 55,841.7 31,147.1 2,488.0 578.0 N/A N/A
7 73,267.8 48,125.5 2,331.1 4,926.6 70,936.7 43,198.9
9 25,212.8 16,114.5 1,053.0 1,801.5 24,159.8 14,313
11 7,347.5 4,576.4 0.0 0.0 7,347.5 4,576.4
Total 231,995.8 142,982.3 65,807.1 35,781.9 112,835.0 76,631.5
4

REGULATORY APPROVALS
The NCDOT respectfully requests that the referenced. Section 404 Permit be modified to
reflect the changes in jurisdictional impacts as outlined in this letter and presented in the
attached drawings. The NCDOT is also requesting a modification to the 401 Water
Quality Certification and Tar-Pamlico Buffer Authorization from the NCDWQ. Finally,
NCDOT is requesting a letter of revision from the Division of Coastal Management to the
CAMA Major Development Permit. In compliance with Section 143-215.3D(e) of the
NCAC, we have provided a method of debiting $475 and $100, as noted in the subject
line of this application, as payment for processing the Section 401 permit modification
application and the LAMA Letter of Revision respectively. We are providing seven
copies of this modification application to the NCDWQ for their review. Please find the
attached updated permit drawings for Site 11.
If you have any questions or need additional information, please call Mr. Jay Johnson at
[phone].
Sincerel ,
Jay J s , D ision Environmental Officer
cc: W/attachment
Mr. John Hennessy, NCDWQ (5 Copies)
Mr. Travis Wilson, NCWRC
Ms. Kathy Matthews, USEPA
Mr. Ronald Mikulak, USEPA -Atlanta, GA
Mr. Clarence W. Coleman, P.E., FHWA
Mr. Gary Jordan, USFWS
Mr. Ron Sechler, NMFS
Mr. Michael Street, NCDMF
Mr. Steve Sollod, NCDCM
Dr. David Chang, P.E., Hydraulics
Mr. Greg Perfetti, P.E., Structure Design
Mr. Mark Staley, Roadside Environmental
Mr. Chris Underwood, PDEA
Mr. C. E. Lassiter, P.E.
W/o attachment
Mr. Scott McLendon, USACE, Wilmington (Cover Letter Only)
Mr. Jay Bennett, P.E., Roadway Design
Mr. Majed Alghandour, P. E., Programming and TIP
Mr. Art McMillan, P.E., Highway Design
Ms. Beth Harmon, EEP
Mr. Todd Jones, NCDOT External Audit Branch
Ms. Stacy Baldwin, P.E., PDEA
Mr. Carl Goode, PE, Human Environment Unit Head
5

BUFFER IMPACTS SUMMARY
IMPACT BUFFER
TY PE ALLOWABLE MITIGABLE REPLACEMENT

SITE NO. STRUCTURE SIZE
TYPE STATION
(FROM/TO) ROAD
CROSSING PARALLEL
IMPACT ZONE 1
(ft2) ZONE 2
(ft2) TOTAL
(ftZ) ZONE 1
(ft2) ZONE 2
(ftZ) TOTAL
(ft2) ZONE 1
(ft2) ZONE 2
(ft2)
1 60" RCP 228+08 -L- X 11774.5 7951.6 19726.1
2 SITE 2 HAS BEEN AVOIDED
3 9' X 7' RCBC 251+10 -L- X 27846.2 16695.9 44542.1
4 2 @ 8' X' 8' RCBC 269+74 -L- X 30705.3 18371.3 49076.6
5 24" RCP 315+20 -L- NO BUFFERS ASSOCIATED WITH THIS CROSSING
6 BRIDGE 324+02/476+76 X 55841.7 31147.1 86988.8
7 48" RCP 497+90 -L- X 73267.8 48125.5 121393.3
8 NA 507+50 -L- RT NO BUFFERS ASSOCIATED WITH THIS SITE
9 3 @ 10' X 9' RCBC 515+10 -L- X 25212.8 16114.5 41327.3
10 24" RCP 525+00 -L- LT NO BUFFERS ASSOCIATED WITH THIS SITE
1 1 78" CSP 28+00/32+00 Y22 X 7347.5 4576.4 11923.9

TOTAL: 55841.7 31147.1 86988.8 176154.1 111835.2 287989.3
Revisions:
Revised Site 11 for drive pipe. 11/6/07

BUFFER IMPACTS SUMMARY
IMPACT BUFFER
TY PE ALLOWABLE MITIGABLE REPLACEMENT

SITE NO. STRUCTURE SIZE
/TYPE STATION
(FROM/TO) ROAD
CROSSING PARALLEL
IMPACT ZONE 1
(ft2) ZONE 2
(ft2) TOTAL
(ft2) ZONE 1
(ft2) ZONE 2
(ft2) TOTAL
(ft2) ZONE 1
(ft2) ZONE 2
(ft2)
1 60" RCP 228+08 -L- X 11774.5 7951.6 19726.1
2 SITE 2 HAS BEEN AVOIDED
3 9' X 7' RCBC 251+10 -L- X 27846.2 16695.9 44542.1
4 2 C~ 8' X' 8' RCBC 269+74 -L- X 30705.3 18371.3 49076.6
5 24" RCP 315+20 -L- NO BUFFERS ASSOCIATED WITH THIS CROSSING
6 BRIDGE 324+02/476+76 X 55841.7 31147.1 86988.8
7 48" RCP 497+90 -L- X 73267.8 48125.5 121393.3
8 NA 507+50 -L- RT NO BUFFERS ASSOCIATED WITH THIS SITE
9 3 C~3 10' X 9' RCBC 515+10 -L- X 25212.8 16114.5 41327.3
10 24" RCP 525+00 -L- LT NO BUFFERS ASSOCIATED WITH THIS SITE
11 NA 28+00/32+00 Y22 X 7347.5 4576.4 11923.9

TOTAL: 55841.7 31147.1 86988.8 176154.1 111835.2 287989.3

WETLAND PERMIT IMPACT SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS

Site
No.

Station
(From/To)

Structure
Size /Type
Permanent
Fillln
Wetlands
(ac)
Temp.
Fillln
Wetlands
(ac)
Excavation
in
Wetlands
(ac)
Mechanized
Clearing
in Wetlands
(ac) Hand
Clearing
in
Wetlands
(ac)
Permanent
SW
impacts
(ac)
Temp.
SW
impacts
ac) Existing
Channel
Impacts
Permanent
(ft) Existing
Channel
Impacts
Temp.
(ft)
Natural
Stream
Design
ft
1 228+08 -L- 60" RCP 0.11 0.02 0.02 170
2 SITE 2 HAS BEEN AVOIDED
3 251+10 -L- 9' X 7' RCBC 1.00 0.45 0.06 0.01 363
4 ` 269+74 -L- 2 Q 8' X 8' RCBC 2.04 0.03 0.16 0.07 484
5 315+20 -L- 24" RCP 0.15 0.02
6 324+02/476+76 L BRIDGE 0.24 0.05 1.83 33.51
7 497+90 -L- 48" RCP 1.56 0.18 1147
8 507+50 -L RT RISER NO WE TLAND OR STREAM IMPACTS AT THIS SITE
9 515+10 -L- 3 Q 10' X 10' RCBC 0.10 0.01 0.05 204
10 525+00 -L- LT 24" RCP 0.13 0.02
11 28+00/32+00 Y22 NA 0.01 58

TOTALS: 5.33 0.08 2.51 33.51 0.39 0.01 2426
Site 4 Fill in Wetlands includes 0.16 Ac of wetlands inside interchange that will be preserved (not cleared).
Revisions:
Added impacts at Site 4 due to omitted wetland. (0.03 Ac excavation in wetlands, 0.02 Ac mechanized clearing) - 4/19/07
Removed 0.05 Ac of mechanized clearing at Site 9 due to existing stormwater pond. - 4/19/07
Revised clearing limits at Site 6. (increase of 0.32 Ac hand clearing in wetlands) - 6/1/07
Revised Site 6 for Shuggart Swamp Mats. (increase of 0.08 Ac hand clearing in wetlands) - 6/20/07
Revised Site 11 stream impacts for driveway pipe (increase of 58 ft and 0.01 ac.). - 10/9/07
Revised 3/37/05

WETLAND PERMIT IMPACT SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS

Site
No.

Station
(From/To)

Structure
Size /Type
Permanent
Fillln
Wetlands
(ac)
Temp.
Fillln
Wetlands
(ac)
Excavation
in
Wetlands
(ac)
Mechanized
Clearing
in Wetlands
(ac) Hand
Clearing
in
Wetlands
(ac)
Permanent
SW
impacts
(ac)
Temp.
SW
impacts
(ac) Existing
Channel
Impacts
Permanent
(ft) Existing
Channel
Impacts
Temp.
(ft)
Natural
Stream
Design
(ft)
1 228+08 -L- 60" RCP 0.11 0.02 0.02 170
2 SITE 2 HAS BEEN AVOIDED
3 251+10 -L- 9' X 7' RCBC 1.00 0.45 0.06 0.01 363
4 ` 269+74 -L- 2 @ 8' X 8' RCBC 2.04 0.03 0.16 0.07 484
5 315+20 -L- 24" RCP 0.15 0.02
6 324+02/476+76 L BRIDGE 0.24 0.05 1.83 33.51
7 497+90 -L- 48" RCP 1.56 0.18 1147
8 507+50 -L RT RISER NO WE TLAND OR STREAM IMPACTS AT THIS SITE
9 515+10 -L- 3 @ 10' X 10' RCBC 0.10 0.01 0.05 204
10 525+00 -L- LT 24" RCP 0.13 0.02
11 28+00/32+00 Y22 78" CSP 0.01 58

TOTALS: 5.33 0.08 2.51 33.51 0.39 0.01 2426
Site 4 Fill in Wetlands includes 0.16 Ac of wetlands inside interchange that will be preserved (not cleared)
Added impacts at Site 4 due to omitted wetland. (0.03 Ac excavation in wetlands, 0.02 Ac mechanized clearing) - 4/19/07
Removed 0.05 Ac of mechanized clearing at Site 9 due to existing stormwater pond. - 4/19/07
Revised clearing limits at Site 6. (increase of 0.32 Ac hand clearing in wetlands) - 6/1/07
Revised Site 11 stream impacts for drive pipe. - 11/6/07