20181033 Ver 1_Mitigation Remediation Plans_20211116

LMG
LAND MANAGEMENT GROUP
a DAVEY# company
November 16, 2021
Ms. Kim Browning
United States Army Corps of Engineers
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Subject: Owen Farms (SAW-2018-01165) Repair Plans
Ms. Browning,
HDR, Inc. (HDR) has contracted Davey Resource Group, Inc. d/b/a Land
Management Group (LMG) to provide monitoring services for the Owen Farms
Mitigation Site (Site). The purpose of this letter is to inform you of recent flood
damage observed at the Site and describe our plan for corrective action. The Site
experienced an approximately 200-year storm event between August 15-17. On -
site rain data recorded 16.70 inches of rain over less than a 72-hour period, with
6.07 inches falling within 3 hours on August 16. Monthly precipitation totals
recorded at the site are attached.
Items that we believe will require remedial action were noted during a site analysis
following the floods of August 15-17. Remedial action items on West Fork of the
French Broad River include addressing floodplain scour in several areas, localized
erosion of two banks, and formation of a transverse bar near the upstream
beginning of restoration. LMG used a drone to capture aerial imagery of the Site
on September 29, 2021. Figure 1 (attached) depicts areas noted above overlain on
the aerial image. Additionally, a photo log is attached that provides representative
photos of the noted areas.
LMG has developed a repair plan for the Site. Standard construction equipment
will be used to repair noted areas (i.e. excavator and off -road hauler). Scoured
areas in the floodplain will be filled with on -site material excavated from adjacent
terrace slopes. Excess cobble and gravel material from the noted transverse bar
between stations 10+50 and 11+50 will be removed and placed along the channel
toe of repaired stream banks. Noted eroded stream banks will be graded to
approximate design dimensions and matted with coir fiber matting. Approximately
50 linear feet of soil lifts will be installed between stations 18+60 and 19+10.
Overall, approximately 100 linear feet of stream bank grading and 100 linear feet
of substrate removal is anticipated as a result of repair activities. Disturbed areas
will be seeded with a permanent, native seed mix and replanted with native species
1
www.lmgroup.net • Phone: [phone]
3101 Poplarwood Court — Suite 120, Raleigh, NC 27604

LMG
LAND MANAGEMENT GROUP
a DAVEY# company
as approved in the Mitigation Plan. A temporary seed mix consisting of rye (grass
and/or grain) will also be applied to disturbed areas.
Repair work will be conducted under the existing Nationwide Permit 27 and
Erosion Control Permit for the Site. The Nationwide Permit 27 (and associated 401
Certification, DWR #18-1033) was issued on March 30, 2020 and expires March
18, 2022. The Erosion Control Permit was issued June 5, 2020 and expires June 5,
2023. Repair work is anticipated to begin by December 10 and be completed by
December 31, 2021. Planting will be completed by March 31, 2022. LMG has
spoken with the North Carolina Wildlife Resources Commission (WRC, Andrea
Leslie) regarding the trout moratorium that is currently in effect at the Site. LMG
will submit a written request for a waiver of the trout moratorium for purposes of
completing repair work at the Site. A copy of this letter will be provided to WRC
and will be included in the Year 1 Monitoring Report.
Should you have any questions or concerns, please call me at 919.588.9663 or you
can reach me via email at [e-mail].
Thank you,
Ben Furr, PWS
Land Management Group
Cc: Jessica Tisdale (HDR)
Paul Wiesner (NCDMS)
Andrea Leslie (NCWRC)
Todd Tugwell (USAGE)
Erin Davis (NCDWR)
Casey Haywood (USAGE)
2
www.lmgroup.net • Phone: [phone]
3101 Poplarwood Court — Suite 120, Raleigh, NC 27604

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Owen Farms Mitigation Site
Photographic Documentation
Repair Areas
Looking downstream at stump to be removed on left bank near Station 10+75.
Looking downstream at eroded right bank near station 11+00.

Owen Farms Mitigation Site
Photographic Documentation
Repair Areas
Looking upstream at excess material deposited in channel, creating transverse bar near Station 11+25.
Looking upstream at scour in the right floodplain near Station 13+00.
2

Owen Farms Mitigation Site
Photographic Documentation
Repair Areas
Looking downstream at scour hole in right floodplain near Station 15+50.
Looking downstream at scour in left floodplain near station 17+50.

Owen Farms Mitigation Site
Photographic Documentation
Repair Areas
Looking at eroded right bank near station 18+75.
Looking upstream at scour in the right floodplain near station 25+75.

Owen Farms Mitigation Site
MUM
Photographic Documentation
Repair Areas
Looking downstream at scour in the left floodplain near station 28+50
9

From: Davis. Erin B
To: Baker. Caroline D
Subject: FW: [External] Owen Farms Repair Plan (SAW-2018-01165)
Date: Monday, November 22, 2021 9:09:07 AM
Attachments: Owen Farms Repair Plan 2021 (SAW-2018-01165).odf
Laserfiche Upload: Email & Attachment
DWR#: 20181033 v.1
Doc Type: Mitigation Remediation Plan
From: Furr, Benjamin [mailto:[e-mail]]
Sent: Tuesday, November 16, 2021 3:45 PM
To: Kim Browning <[e-mail]>
Cc: Tugwell, Todd J CIV USARMY CESAW (US) <[e-mail]>; Haywood, Casey M
CIV (USA) <[e-mail]>; Davis, Erin B <[e-mail]>; Leslie,
Andrea J <[e-mail]>; Wiesner, Paul <[e-mail]>; Miller, Vickie
M. (Raleigh) <[e-mail]>; Tisdale, Jessica <[e-mail]>; Christopher
Smith <[e-mail]>; Kevin Williams <[e-mail]>; Ryan Smith
<[e-mail]>
Subject: [External] Owen Farms Repair Plan (SAW-2018-01165)
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Kim,
Per our conversation in October, I have attached a letter detailing repair work that we plan to
complete at the Owen Farms Mitigation Site next month. Please review and let me know if
you have any questions or need additional information. We are working with Natural Balance
Contractor, LLC to complete repair work. The owner of Natural Balance Contractor was the
equipment operator during the original construction of this project.
Thank you,
Benjamin N. Furr I Senior Consultant
Land Management Groupl Environmental Consultants
3101 Poplarwood Court, Suite 120 1 Raleigh, NC 27604
Cell: 919.588.9663 1 www.lmgroup net
71