NWP27_NCDMS-BugHeadwaters 2024Repairs_SAW-2018-01788

DEPARTMENT OF THE ARMY
U.S. ARMY CORPS OF ENGINEERS, WILMINGTON DISTRICT
MITIGATION BRANCH
151 PATTON AVENUE SUITE 208
ASHEVILLE NC 28801
April 24, 2024

Regulatory Division
SAW-2018-01788

Sent Via email: [e-mail]

Lin Xu
North Carolina Division of Mitigation Services (NCDMS)
217 West Jones Street, Suite 3000A
Raleigh, NC 27603

Dear Mr. Xu:

This letter is in response to the Pre-Construction Notification (PCN) you submitted to
the Wilmington District, Mitigation Branch on March 14, 2024, for a Department of the
Army Nationwide permit (NWP) verification. This project has been assigned the file
number SAW-2018-01788 and is known as NCDMS – Bug Headwaters Mitigation Site.
This file number should be referenced in all correspondence concerning this project.

A review of the information provided indicates that the proposed work would include
the discharge of fill material into an additional 451 linear feet of stream channel, and
0.019 acres of wetlands associated with mechanized land clearing, excavation,
placement of fill material, and stream relocation activities for the NCDMS Bug
Headwaters Mitigation Site. The project area for this determination includes a 22.7
acre(s) area which is illustrated on the enclosed site plans/maps. These impacts do not
include the repair impacts previously authorized in 2023. Compensatory mitigation is
NOT required in conjunction with the aforementioned activities. Refer to the enclosed
plans and Repair Summary Table for a detailed summary of impacts. The project/review
area is located at 8600 Austin Traphill Rd , at Latitude 36.323840 and Longitude -
80.977840; in Traphill, Wilkes County, North Carolina.

We have determined that the proposed work is authorized by NWP 27 pursuant to
authorities under Section 404 of the Clean Water Act (33 U.S.C § 1344). The proposed
work must be accomplished in strict accordance with the general permit conditions, any
regional conditions, the special conditions listed in this letter, the application materials,
and the enclosed plans. If the extent of the project area and/or nature of the authorized
impacts to waters are modified, a revised PCN must be submitted to this office for
written approval before work is initiated. Any violation of permit conditions or deviation
from your submitted plans may subject the permittee to enforcement action.

This verification is valid until March 14, 2026, unless prior to this date the subject
NWP(s) is suspended, revoked, or is modified such that the activity no longer complies
with the terms and conditions of this NWP. If you commence or are under contract to
commence this activity before the date that the relevant NWP is modified or revoked,
you will have 12 months from the date of the modification or revocation of the NWP to
complete the activity under the present terms and conditions of this NWP.

Project Specific Special Conditions:

1. The permittee understands and agrees that the document entitled “Mitigation
Plan Final – Bug Headwaters Mitigation Site” dated September 2020 is
incorporated and made part of this permit. Execution of the work and terms given
in the approved mitigation plan are a condition of this permit.

2. This Nationwide Permit verification does not imply suitability of this property
for compensatory mitigation for any particular project. The use of any portion of
this site as compensatory mitigation for a particular project will be determined
during the permit review process for that project.

This NWP verification does not preclude the necessity to obtain any other Federal,
State, or local permits, licenses, and/or certifications, which may be required.

If you have any questions related to this verification or have issues accessing
documents referenced in this letter, please contact Steve Kichefski, Project Manager of
the Mitigation Branch at [phone] x4234, by mail at the above address, or by
email at [e-mail]. Please take a moment to complete our
customer satisfaction survey located at https://regulatory.ops.usace.army.mil/customer-
service-survey/.

Sincerely,
Steve Kichefski
Project Manager, Mitigation Branch

Enclosures

Cc (w/enclosures)
Jeff Keaton, Wildlands Engineering (via [e-mail])
Bug Headwaters Mitigation Site
DMS Project No. 100084
Monitoring Year 4 - 2024
Reach Associated
Impact ID Approach Start Station End Station Length (LF)
Total Wetland
Impacted (ac)Description Planned 2024 Management Action February Updates
Big Bugaboo
Creek R1 S3 Restoration 108+30 109+69 139 --
Piping log sill, banks eroding downstream of
log sill, riffle material washed away.
Replace riffle material and reform eroded banks,
mat or sod mat, reseed, and livestake. New
120+25 120+50 25
Riffle material washed away and eroded
banks.
Replace riffle material and reform eroded banks,
mat or sod mat, reseed, and livestake. IRT Approved
125+44 125+68 24
Riffle material washed away and eroded
banks.
Replace riffle material and reform eroded banks,
mat or sod mat, reseed, and livestake. IRT Approved
137+00 138+14 114
Brush toe eroding on bend. Eroded right
bank around and below log sill. Left bank
eroding on outer pool bend below log sill.
Riffle material washed away.
Repair eroded bank. Mat or sod mat, reseed, and
livestake. Replace log sill, repair point bar
IRT approved repairs
needs extending.
Not for Credit --- --- ---
Rill erosion and headcut along left
floodplain from wetland seep
Stabilize headcut with coir logs, juncus plugs,
and/or livestakes. New Manual Repair
138+60 142+08 348 --
Riffle material washed away due to bedrock.
Banks are eroded due to lack of vegetation
from Murdianna spraying.
Add boulder around bedrock to prevent future
erosion. Rebuild eroded banks, mat or sod mat,
reseed, and livestake.
IRT approved repairs
needs extending.
---
Log sill was tilted too much towards the left
bank, pushing water directly into left bank
and not over the center of the channel.
Adjust elevation across log sill, matt or sod matt,
reseed, and livestake. IRT Approved
-- Eroded left bank around log sill.
Repair bank around log sill, mat or sod mat,
reseed, and livestake IRT Approved
141+20 141+30 10
Stream is pushing into right bank, creating
scour.
Push riffle material to the left side of the stream
to prevent further scour. IRT Approved
UT2 Reach 3 S2, W2 Restoration 307+30 307+50 20 0.001 Riffle material washed out. Rebuild riffle with larger material. IRT Approved
UT2 Reach 5 S3 Restoration 316+85 317+03 17 Incised riffle Rebuild riffle with larger material. New
400+00 401+19 119 Enhancement II section downcutting.
Rebuild reach as an Enhancement I section by
keeping same alignment but raising stream bed
and building riffles and pools.
IRT Approved
400+55 400+70 15
Stream is pushing into left bank, creating
scour.
Grade back left bank so stream can have access to
floodplain during storm events. IRT Approved
UT2A Reach 2 S1 Restoration 404+80 405+20 40 --
Left bank eroded around a series of 3
boulder sills.
Reform boulder sills and banks, reseed, and
livestake. New
S4 Restoration 612+02 612+30 28 -- Eroded banks.
Reform eroded banks, mat or sod mat, reseed,
and livestake.
Manual repair
completed.
W4, W5 Not for Credit --- --- --- 0.019
Secondary channel at the time of
construction has now become the main
channel due to debris jam and sediment
buildup.
Reroute water from the secondary channel into
the restored stream near the upstream end of the
conservation easement.
New
UT3
UT2A Reach 1
Enhancement I
Enhancement II
Table 1. Repair Summary Table
Big Bugaboo
Creek Reach 4
Restoration
140+28
139+55
Big Bugaboo
Creek Reach 3 S3
S3, W3
S1, W1
--
0.021
0.022
Big Bugaboo Creek
Reach 3
UT3
Big Bugaboo Creek
Reach 4
UT2A
Reach 1
UT2
Reach 1
UT4
Big Bugaboo Creek
Reach 2
Big Bugaboo Creek
Reach 1
UT2
Reach 3 UT1
UT2
Reach 2
UT2B
UT2A
Reach 2
UT2
Reach 5
UT2
Reach 4
Figure 3. Impact Map Overview
Bug Headwaters Mitigation Site
DMS Project No. 100084
Monitoring Year 4 - 2024
0 200 400 Feet
Wilkes County, NC
2022 Aerial Photography
Conservation Easement
Internal Crossing
Temporary Construction Easement - MY4
Ephemeral Step-Pool BMP
Wet Detention Basin
Pre-Construction Wetlands
Additional Wetlands - Approximate
Temporary Wetland Impact - Approved 2023
Permanent Wetland Impact - New 2024
Temporary Wetland Impact - New 2024
Stream Restoration
Stream Enhancement I
Stream Enhancement II
No Credit
Permanent Stream Impact - Approved 2023
Permanent Stream Impact - New 2024
Topographic Contours (4')
Reach Breaks
Figure 3a.
Figure 3b.
Figure 3c.
S3 - Repair Stream Structures & Bank Stabilization
S1 - Repair Boulder Sills & Bank Stabilization
301+00
303+00
305+00
307+00
30
9
+
0
0
3
1
1
+
0
0
4
0
0
+
0
0
402+
0
0
2
0
1
+
0
0
203
+
0
0
1
0
3
+
0
0
1
1
1
+
0
0
1
0
1
+
0
0
4
0
4
+
0
0
4
0
6
+
0
0
1
0
5
+
0
0
1
0
7
+
0
0
1
0
9
+
0
0
1
1
3
+
0
0
1
1
5
+
0
0
UT2A
Reach 1
UT2
Reach 1
Big Bugaboo Creek
Reach 2
Big Bugaboo Creek
Reach 1
UT2
Reach 3
UT1
UT2
Reach 2
UT2A
Reach 2
Figure 3a. Impact Map
Bug Headwaters Mitigation Site
DMS Project No. 100084
Monitoring Year 4 - 2024
0 150 300 Feet
Wilkes County, NC
Conservation Easement
Internal Crossing
Ephemeral Step-Pool BMP
Wet Detention Basin
Pre-Construction Wetlands
Temporary Wetland Impact - Approved 2023
Stream Restoration
Stream Enhancement I
Stream Enhancement II
No Credit
Permanent Stream Impact - Approved 2023
Permanent Stream Impact - New 2024
Topographic Contours (4')
Reach Breaks
2022 Aerial Photography
S2 - Repair Constructed Riffle
30
9
+
0
0
3
1
1
+
0
0
313+00
315+00
317+00
319+00
32
1
+
0
0
501+00
1
1
7
+
0
0
1
1
9
+
0
0
12
1
+
0
0
123+00
125+00
12
7
+
0
0
129
+
0
0
131+00
13
5
+
0
0
13
3
+
0
0
1
1
3
+
0
0
1
1
5
+
0
0
Big Bugaboo Creek
Reach 3
Big Bugaboo Creek
Reach 2
UT2
Reach 3
UT2B
UT2
Reach 5
UT2
Reach 4
Figure 3b. Impact Map
Bug Headwaters Mitigation Site
DMS Project No. 100084
Monitoring Year 4 - 2024
0 150 300 Feet
Wilkes County, NC
2022 Aerial Photography
Conservation Easement
Internal Crossing
Pre-Construction Wetlands
Stream Restoration
Stream Enhancement I
Stream Enhancement II
No Credit
Permanent Stream Impact - Approved 2023
Permanent Stream Impact - New 2024
Topographic Contours (4')
Reach Breaks
W4 - Diversion Channel
W5 - Floodplain Grading
S3 - Repair Stream Structures & Bank Stabilization
123+00
125+00
12
7
+
0
0
129
+
0
0
131+00
612+
0
0
13
5
+
0
0
13
3
+
0
0
1
3
7
+
0
0
139+00
141+
0
0
7
0
0
+
0
0
600+
0
0
60
2
+
0
0
60
4
+
0
0
606+00
608+00
61
0
+
0
0
614+
0
0
Big Bugaboo Creek
Reach 3
UT3
Big Bugaboo Creek
Reach 4
UT4
Figure 3c. Impact Map
Bug Headwaters Mitigation Site
DMS Project No. 100084
Monitoring Year 4 - 2024
0 150 300 Feet
Wilkes County, NC
2022 Aerial Photography
Conservation Easement
Internal Crossing
Temporary Construction Easement - MY4
Pre-Construction Wetlands
Additional Wetlands - Approximate
Temporary Wetland Impact - Approved 2023
Permanent Wetland Impact - New 2024
Temporary Wetland Impact - New 2024
Stream Restoration
Stream Enhancement I
Stream Enhancement II
No Credit
Permanent Stream Impact - Approved 2023
Permanent Stream Impact - New 2024
Topographic Contours (4')
Reach Breaks

Compliance Certification Form

File Number: SAW-2018-01788 County: Wilkes

Permittee: North Carolina Division of Mitigation Services (NCDMS), Lin Xu

Project Name: NCDMS – Bug Headwaters Mitigation Site

Date Verification Issued: 4/24/2024

Project Manager: Steve Kichefski

Upon completion of the activity authorized by this permit and any mitigation required by
the permit, sign this certification and return it to the following address:

US ARMY CORPS OF ENGINEERS
Wilmington District
Attn: Steve Kichefski
Mitigation Branch
151 Patton Avenue Suite 208
Asheville, NC 28801
or
[e-mail]

Please note that your permitted activity is subject to a compliance inspection by a U. S.
Army Corps of Engineers representative. Failure to comply with any terms or conditions
of this authorization may result in the Corps suspending, modifying or revoking the
authorization and/or issuing a Class I administrative penalty, or initiating other
appropriate legal action.

I hereby certify that the work, and mitigation (if applicable), authorized by the above
referenced permit has been completed in accordance with the terms and conditions of
the said permit including any general or specific conditions.

Date Authorized Work Started: ___________ Completed: ___________

Describe any deviations from permit (attach drawing(s) depicting the deviations):

______________________________________________________________________

______________________________________________________________________
*Note: The description of any deviations on this form does not constitute approval by the Corps.

__________________________________ ______________________
Signature of Permittee Date