20190868 Ver 1_IRT Field Meeting 16July2019_20190723

Strickland, Bev
From:
Dow, Jeremiah J
Sent:
Tuesday, July 23, 2019 3:05 PM
To:
Tugwell, Todd J CIV USARMY CESAW (US); Kim Browning; Haupt, Mac; Davis, Erin B;
Wilson, Travis W.
Cc:
Schaffer, Jeff, Blackwell, Jamie D
Subject:
FW: [External] Dynamite Creek
Attachments:
IRT Field Meeting-DynamiteCr_16July2019.pdf
Follow Up Flag: Follow up
Flag Status: Flagged
All,
Attached are the meeting notes from the Dynamite Creek site visit on 7/16/19.
Thank you,
Jeremiah Dow
NC DEQ Division of Mitigation Services
217 West Jones St.
Raleigh, NC 27699-1652
[phone] office
[phone] cell
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third
parties.
From: John Hutton [mailto:[e-mail]]
Sent: Tuesday, July 23, 2019 2:38 PM
To: Dow, Jeremiah J <[e-mail]>
Cc: Chris Roessler <[e-mail]>
Subject: [External] Dynamite Creek
• External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]
Hi Jeremiah,
Chris is out of town right now so I am stepping in for him on the meeting notes for Dynamite. Please review and let me
know if you have any edits before it goes to the IRT. I assume you will want to issue them so feel free to send these out
if you don't have any edits.
Thanks
John Hutton I Vice President

0: 919.851.9986 ext. 102 M: 919.723.8203
Wildlands Engineering, Inc.
312 W. Millbrook Road, Suite 225
Raleigh, NC 27609

IRT Field Meeting Notes — Dynamite Creek
Meeting Attendees
Todd Tugwell/USACE
Kim Browning/USACE
Mac Haupt/NCDWR
Erin Davis/NCDWR
Travis Wilson/NCWRC
Lindsay Crocker/NCDMS
Jamie Blackwell/NCDMS
Jeremiah Dow/NCDMS
Tim Baumgartner/NCDMS
John Hutton/Wildlands
Chris Roessler/Wildlands
July 16, 2019
John Hutton and Chris Roessler of Wildlands Engineering, Inc. (Wildlands) led the group on a tour of the
Dynamite Creek mitigation site in Eden, NC. The purpose of the tour was to present the site to a group
of IRT members and to get input on the management/mitigation options proposed for the site. During
the tour, the group openly discussed the condition of the stream channels on the site and the design
options and crediting scenarios they felt would be most appropriate to restore and enhance the
channels. The accompanying map identifies the stream reach names.
The tour began on the downstream end of Dynamite Creek, on the Dan River floodplain then moved
upstream into the wooded headwaters. Comments provided during the site visit are listed below by
reach.
Lower Dynamite Creek
Lower Dynamite Creek is a straightened and dredged channel that flows through part of the Dan River
floodplain. The project wetlands surround the channel.
The IRT was concerned that the combination of low slope and high sediment load in this reach could
result in a situation where sediment transport capacity was inadequate and the channel would aggrade.
John said Wildlands would focus on reducing the sediment load significantly through the proposed work
upstream and designing a low sinuosity E -channel to improve sediment transport capacity. The IRT
agreed that low sinuosity was appropriate. Todd recommended a strategy for adaptive management in
case the channel fills with sediment or becomes choked with vegetation.
The IRT asked whether there was any evidence that Dynamite Creek historically flowed directly to the
Dan River. The group inspected the linear wooded corridor in between the project area and the river.
The IRT agreed with Wildlands that while it was possible the stream historically flowed that direction,
the amount of grading required to bring the stream into this corridor and the difficulty of tying this small
stream down to the river made this solution impractical.
Mac reviewed the soils throughout area proposed for wetland re-establishment. He agreed with
Wildlands assessment that the soils appear hydric in more of the easement area than was indicated on

the Licensed Soil Scientist report. Additionally, all parties agreed that some of the area proposed for re-
establishment credit would probably be considered jurisdictional wetland now. Wildlands noted that
this would be fine to adjust some of the re-establishment to rehabilitation as the extent of wetland
reestablishment should be greater than what was proposed. A final wetland plan will be based on a
jurisdictional determination and more detailed hydric soils analysis.
Upper Dynamite Creek
The group continued upstream into the wooded part of the stream corridor. Wildlands proposed a
restoration approach to move the channel away from the right valley wall. The IRT noted that one
section of this reach appeared stable but agreed with the overall approach as the stream was unstable
above and below that section.
In the next reach, John presented a figure that detailed specific Enhancement 2 measures and locations.
Additionally, John explained how Wildlands would minimize disturbance and tree mortality by limiting
ingress and egress. All materials will be harvested at individual treatment locations. The IRT appreciated
this approach and the figure with specific treatments. However, Todd suggested that since the lower
end had more intensive treatments followed immediately upstream by a long stretch of no treatment
that Wildlands consider the lower end E1 and the section above preservation, at 10:1. At the upper end
of the previously proposed E2 reach is a steep, eroding hillslope that the channel touches. The IRT
recommended realigning the channel here and leaving a disconnected oxbow at the foot of the eroding
hillslope. For this section, Todd recommended an E1 approach. A figure showing these changes is
provided at the end of the minutes.
Moving upstream, behind a failed dam are deep legacy sediments with mature trees. Dynamite Creek
has incised through this section to create 5-8' vertical and eroding streambanks. John explained that
Wildlands proposed to continue Priority 1 restoration from upstream of the power line crossing through
this area. Toward the downstream end of the legacy sediment Wildlands will use a Priority 2 restoration
with a B step pool channel to connect with the existing stream channel below the breached dam.
Wildlands will seal structures to prevent erosion of legacy sediments. Travis commented that the old
channels should be filled nearly completely and include compacted plugs to prevent the streamflow
from resuming this path.
Wildlands will harvest all material for instream structures on the property. Trees that have to be
removed for construction will be used in log sills, vanes, cover logs, and brush toe. Rock will be
harvested at the immediate work site in the Enhancement 2 section and where possible in the
restoration sections. A supplemental on-site rock harvest location will be used to provide rock where it
can not be obtained in the immediate vicinity.
Summary and Conclusion
The IRT generally agreed with the approaches and credit ratios proposed by Wildlands for the Site, but
recommended several changes as specified above and in the attached map.
Contacts

Jeremiah Dow will serve as the Project Manager for NCDMS and the main point of contact. Chris
Roessler will be the Wildlands Project Manager and coordinate/submit project deliverables directly to
Jeremiah for distribution to all NCIRT team members.
Action Items and Next Steps
• Project Schedule — Wildlands is ready to proceed immediately with the Task 1 deliverable
(Categorical Exclusion) and does not anticipate project delays.
• After the jurisdictional determination has been conducted, any wetland areas that will be
impacted by the proposed work (filled or drained) will need to be identified and functional
replacement for those losses should be proposed and discussed in the draft mitigation plan.
• USACE requires Jurisdictional (JD) stream/wetland calls for the project. Wildlands will coordinate
with David Bailey (or assigned) for on-site JD verification prior to mitigation plan submittal.
• Signage will be needed on all conservation easement areas.
This represents Wildlands' interpretation of the meeting discussions. If any meeting attendees should
find any information contained in these meeting minutes to be in error and/or incomplete based on
individual comments or conversations, please notify Chris Roessler with corrections/additions as soon as
possible.
Sincerely,
Chris Roessler
[e-mail]
919.624.0905

Figure 6 Concept Map
iftWILDLANDS Dynamite Creek Mitigation Site
ENGI NEER[ NG 0 400 Feet Roanoke River Basin 03010103
1 1 1 1 1 t
Rockingham County, NC

:L
Re h
Toe wood -- use
adjacent fallen tree
1V4
Slope point bar to open capacity
End channel realignment
Begin channel realignment
Slope point bar to decrese stress
and generate fill locally
or,boulder toe
Dont move any
further upstream
7N
T,
Pull meander bend away4 'N
from hillsploe use toe wood
\N:
Remove dam
Iroposed Stream Restoration Reach 2
••• -• Stream Enhancement 11
Iroposed Stream Preservation
Ion -Project Streams
tpographic Contours (4')
2018 Aerial Photography
v�N—it.,LL.&46.0, 71