20181274 Ver 1_Notice of NCDEQ - Mitigation Plan Addendum Request_20200922

Strickland, Bev
From:
Sent:
To:
Cc:
Subject:
Attachments:
Follow Up Flag:
Flag Status:
Casey, Erin, Kim, and Todd;
Wiesner, Paul
Tuesday, September 22, 2020 6:09 PM
Haywood, Casey M CIV (USA); Davis, Erin B; Kim Browning; Tugwell, Todd J CIV
USARMY CESAW (US)
Jeff Keaton; Shawn Wilkerson; Xu, Lin; Phillips, Kelly D
Notice of NCDEQ - DMS Mitigation Plan Addendum Request: Lyon Hills Mitigation
Site (DMS#100085) - (SAW-2018-01784) (DWR#20181274) - Yadkin 03040101_Wilkes
County
Lyon Hills_100085_Mitigation Plan Addendum -Sept. 22, 2020.pdf
Follow up
Completed
Wildlands Engineering Inc. (WEI) and DMS are requesting a minor project change (crossing update from a bridge to a
culvert) on the Lyon Hills Mitigation Site. Proposed mitigation credits are not anticipated to change based on the
crossing update.
DMS understands that WEI has contacted the USACE and DWR and a 404/401 permit modification is not necessary for
this minor change.
The crossing change is documented in the attached mitigation plan addendum and will also be documented in the
project's post construction MYO - As -Built/ Record Drawing report.
Project construction is scheduled to begin on October 5, 2020.
Please review and let us know if have any questions, comments or concerns. Unless there is an issue, WEI plans to begin
construction on the site as scheduled.
Project information is as follows:
Lyon Hills Mitigation Site
DMS Project # 100085
Institution Date: 6/22/2018
RFP 16-007334 (Issued: 12/7/2017)
Yadkin River Basin
Cataloging Unit 03040101
Wilkes County, North Carolina
USACE Action ID: SAW-2018-01784
DWR#: 20181274
Proposed Mitigation Project Credits (per the IRT approved mitigation plan):
5,304.783 SMU (cool)
Full Delivery Provider: Wildlands Engineering Inc. (WEI) - Contact: Jeff Keaton, PE I Senior Water Resources Engineer
0: 919.851.9986 x103 M: 919.302.6919
NCDEQ- DMS Project Manager: Kelly Phillips, [e-mail], [phone]
1

Thanks
Paul Wiesner
Western Regional Supervisor
North Carolina Department of Environmental Quality
Division of Mitigation Services
828-273-1673 Mobile
Pau l.wiesner(cDncdenr.gov
Western DMS Field Office
5 Ravenscroft Drive
Suite 102
Asheville, N.C. 28801
OwfN Mln/n••nW tpoft
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

Itzt
W 1LDLANDS
Technical Memorandum
Prepared for: Interagency Review Team
Project Title: Lyon Hills Mitigation Site
NCDMS Project No. 100085
Project No:
USACE ID: SAW-2018-01784
NCDEQ Contract No. 7620
DWR No. 2018-1274 v1
Subject:
Mitigation Plan Addendum — Culvert Crossing on Hanks Branch
Date:
September 22, 2020
Kim Browning, USACE
To:
Erin Davis, NCDEQ
Casey Haywood, USACE
From:
Jeff Keaton, Project Manager
CC:
Kelly Phillips, NCDMS
Paul Wiesner, NCDMS
The purpose of the memorandum is to describe a minor change to the final Lyon Hills Mitigation Plan. Section
3.6 of the mitigation plan submitted in July 2020 includes discussion of six crossings on the project site including
four culverts, a ford, and a bridge. The bridge crossing was proposed for Hanks Branch Reach 2. Due to cost of
construction, it is necessary to change this crossing from a bridge to a double culvert crossing. Table 6 —
Easement Breaks and Crossings in Section 3.6 needs to be amended and the new table is shown below. In
addition, Table 19 — Determination of Credits has a notes column where it is indicated that there is a 42-foot
wide crossing with a bridge on Hanks Branch Reach 2 that is excluded from credit. This table also needs to be
revised and the new version is shown below. These are the only two places in the final mitigation plan where
the bridge was discussed. The width of the easement break will not change so there is no change in credits. A
detail for the new culvert crossing on Hanks Branch Reach 2 is attached.
The two pipes that were originally in this location were 20 feet long. The two new pipes will be 39 feet long
which will create approximately 19 linear feet of additional stream impact. This was discussed with Kim
Browning on September 17t" and Kim indicated that she wanted the additional impacts reported in this memo
but that it would not require a change and resubmittal of the PCN. She also stated in an email on September
22"d that the crossing would be exempt from 404 permitting requirements because its an agricultural crossing.
Erin Davis indicated in an email on September 215Y that no 401 certification modification would be required for
the same reason. Construction of this project is scheduled to begin on October 5t". Please let us know if any
additional information is needed either to support the amendment to the mitigation plan or regarding the
additional stream impacts.
W Lyon Hills Mitigation Site
Technical Memorandum

Table 1: Easement Breaks and Crossings
No.
Width (ft)
Location
Internal or External
Crossing Type
1
40
UT1
Internal
Culvert
2
40
UT3 Reach 3
Internal
Culvert
3
40
UT4 Reach 3
Internal
Culvert
4
40
UT5 Reach 2
Internal
Culvert
5
40
Hanks Branch Reach 2
Internal
Culvert
6
40
Sparks Creek
Internal
Ford
Table 2: Determination of Credits
Existing
Mitigation
Mitigation
Footage
Plan
Mitigation
Restoration
Priority
Project Segment
Ratio
Notes
or
Footage or
Category
Level
Level
(X:1)
Acreage
Acreage
No buffer onright
Sparks Creek -Not for Credit
215
215
Cool
Ell
N/A
2.5
side
Sparks Creek
405
405
Cool
Ell
N/A
2.5
Ford
Sparks Creek - Not for Credit
42
42
Cool
Ell
N/A
2.5
crossing
Sparks Creek
332
332
Cool
Ell
N/A
2.5
Hanks Branch Reach 1
1678
1678
Cool
Ell
N/A
2.5
Hanks Branch Reach 2
1083
1065
Cool
Ell
N/A
2.5
Hanks Branch Reach 2 - Not
Culvert
42
42
Cool
Ell
N/A
2.5
for Credit
crossing
Hanks Branch Reach 3
581
581
Cool
El
PII
1.5
TCE to work
above
UT1 - Not for Credit
61
60
Cool
R
PI
1
property
line
UT1
717
659
Cool
R
PI
1
Culvert
UT1 - Not for Credit
42
40
Cool
R
PI
1
crossing
UT1
110
106
Cool
R
PI
1
UT2
78
78
Cool
Ell
N/A
3
UT3 Reach 1
702
655
Cool
R
PI
1
UT3 Reach 2
447
447
Cool
Ell
N/A
2.5
UT3 Reach 3
560
513
Cool
R
PI
1
Culvert
UT3 Reach 3 - Not for Credit
47
45
Cool
R
PI
1
crossing
UT3 Reach 3
84
74
Cool
R
PI
1
UT3 Reach 4
272
272
Cool
Ell
N/A
4
UT3A
253
253
Cool
Ell
N/A
2.5
UT4 Reach 1
237
233
Cool
R
PI
1
UT4 Reach 2
323
323
Cool
Ell
N/A
2.5
UT4 Reach 3
138
140
Cool
R
PI
1
W Lyon Hills Mitigation Site
Technical Memorandum

Existing
Mitigation
Mitigation
Footage
Plan
Mitigation
Restoration
Priority
Project Segment
Ratio
Notes
or
Footage or
Category
Level
Level
(X:1)
Acreage
Acreage
Culvert
UT4 Reach 3 - Not for Credit
42
40
Cool
R
PI
1
crossing
UT4 Reach 3
96
100
Cool
R
PI
1
UT5 Reach 1
437
437
Cool
Ell
N/A
4
UT5 Reach 2
207
220
Cool
R
PI
1
Culvert
UT5 Reach 2 - Not for Credit
36
35
Cool
R
PI
1
crossing
UT5 Reach 2
113
107
Cool
R
PI
1
UT5A
318
318
Cool
Ell
N/A
3
Project Credits
Restoration Level
Stream (LF)
Riparian Wetland (Acres)
Non -
Riparian
Wetland
(Acres)
Coastal
Marsh
Warm
Cool
Cold
Riverine
Non-Riverine
Restoration
2,807.000
N/A
N/A
N/A
N/A
Re-establishment
N/A
N/A
N/A
N/A
Rehabilitation
N/A
N/A
N/A
N/A
Enhancement
N/A
N/A
N/A
N/A
Enhancement I
387.333
N/A
N/A
N/A
N/A
Enhancement II
2,110.450
N/A
N/A
N/A
N/A
Creation
N/A
N/A
N/A
N/A
Preservation
0.000
N/A
N/A
N/A
N/A
Totals
5,304.783
0.000
0.000
0.000
Lyon Hills Mitigation Site
Technical Memorandum

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From: Brownina. Kimberly D CIV USARMY CESAW (USA)
To: Jeff Keaton
Subject: RE: Lyon Hills Culvert
Date: Tuesday, September 22, 2020 9:41:26 AM
Hey Jeff
I just wanted to follow up with our conversation from last week and confirm that since the crossing is determined to be ag exempt, it will not get authorized as an impact and is
therefore not included in the impact length, and a permit modification will not be required. (This assumes that you have met the requirements of the exemption, including avoiding
and minimizing impacts for the crossing.)
Thanks
Kim
Kim Browning
Mitigation Project Manager, Regulatory Division I U.S. Army Corps of Engineers
-----Original Message -----
From: Browning, Kimberly D CIV USARMY CESAW (USA)
Sent: Wednesday, September 09, 2020 12:00 PM
To: Jeff Keaton <[e-mail]>; Davis, Erin B <[e-mail]>
Cc: Haywood, Casey M CIV (USA)<[e-mail]>
Subject: RE: [External] Lyon Hills Culvert
Correct, as long as the failed culvert replacement occurs "in place" and you're not extending the footprint of the culvert or installing additional dissipater pads, no permit mod is
required.
Kim Browning
Mitigation Project Manager, Regulatory Division I U.S. Army Corps of Engineers
-----Original Message -----
From: Jeff Keaton <[e-mail]>
Sent: Wednesday, September 09, 2020 11:44 AM
To: Davis, Erin B <[e-mail]>
Cc: Browning, Kimberly D CIV USARMY CESAW (USA) <[e-mail]>
Subject: [Non-DoD Source] RE: [External] Lyon Hills Culvert
OK, great. Kim - Same for you?
From: Davis, Erin B <[e-mail]>
Sent: Wednesday, September 9, 2020 11:42 AM
To: Jeff Keaton <[e-mail]>
Cc: Kim Browning <[e-mail]>
Subject: RE: [External] Lyon Hills Culvert
Correct. If there will be no change to impacts, then a permit modification is not required. We just need a record of the crossing type change for the mitigation plan. Thanks.
From: Jeff Keaton [mailtojkeaton&wildlandseng.com]
Sent: Wednesday, September 9, 2020 10:38 AM
To: Kim Browning <[e-mail] <mailto:Kimberly.D.Browning@.usace.army.mil> >; Davis, Erin B <[e-mail]
<mailto:erin.davis&ncdenr.gov> >
Subject: [External] Lyon Hills Culvert
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to [e-mail]
<mailto:report. spam&nc.gov>
Kim & Erin - I asked Charlie to determine if there would be a change in stream impacts due to the switch from bridge to culvert. There are no wetlands in that location. This is
what he said: The crossing will serve an established, ongoing agricultural operation so we expected it to be exempt from 401/404 permitting. No impact length associated with
this crossing was submitted in the PCN. Therefore there is no change in impacts. Does that make sense? If this is correct, then we don't need to change the permits, right? It may
also help to know that an agricultural crossing that was previously established at this location failed in September of 2018 (Hurricane Florence), so we will just be replacing the
culverts. Thanks.
Jeff Keaton, PE I Senior Water Resources Engineer
0:919.851.9986 x103 M:919.302.6919
Wildlands Engineering, Inc.
<Blockedhttps://urldefense.com/v3/_htm:/www.wildlandseng.com/:IIHYmSToolOdBO6N25hdM9g2Ee5EwWDoxoj3frU, azE ' mTwdyaoLrTNXRG_J3tlmv3GYx6Fk$>
312 West Millbrook Road, Suite 225

From:
Davis. Erin B
To:
Jeff Keaton
Subject:
RE: [External] Lyon Hills Culvert
Date:
Monday, September 21, 2020 2:17:44 PM
Hi Jeff,
I apologize for the delayed response. If the new culvert meets all of the requirements for the
agricultural crossing exemption, then a 401 WQC approval modification is not needed.
Many thanks,
Erin
From: Jeff Keaton [mailto:jkeaton@wild landseng.com]
Sent: Friday, September 18, 2020 12:29 PM
To: Davis, Erin B <[e-mail]>
Subject: RE: [External] Lyon Hills Culvert
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to report.spamPnc.eov
Erin — I tried to call to discuss this and got your voicemail message. I spoke with Kim about this
yesterday but also want to let you know the new culvert (that replaces the bridge) on Lyon Hills will
be about 19 LF longer than the original culvert in that location. Do we need to do anything or
provide any additional information in terms of the 401 permit? Please let me know ASAP. We are
planning to mobilize October 5th. Give me a call if we need to discuss at 919-302-6919. Thanks.
Jeff
From: Davis, Erin B <erin.davis(@ncdenr.gov>
Sent: Wednesday, September 9, 2020 11:42 AM
To: Jeff Keaton <ikeaton(@wildlandseng.com>
Cc: Kim Browning <Kimberly.D.Browning(@usace.army.mil>
Subject: RE: [External] Lyon Hills Culvert
Correct. If there will be no change to impacts, then a permit modification is not required. We just
need a record of the crossing type change for the mitigation plan. Thanks.
From: Jeff Keaton [mailto:jkeaton(@wildlandseng.com]
Sent: Wednesday, September 9, 2020 10:38 AM
To: Kim Browning <Kimberly.D.BrowningPusace.army.mil>; Davis, Erin B <erin.davis(@ncdenr.gov>
Subject: [External] Lyon Hills Culvert
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
LVchment to report.spam(@nc.gov

Kim & Erin — I asked Charlie to determine if there would be a change in stream impacts due to the
switch from bridge to culvert. There are no wetlands in that location. This is what he said: The
crossing will serve an established, ongoing agricultural operation so we expected it to be exempt
from 401/404 permitting. No impact length associated with this crossing was submitted in the PCN.
Therefore there is no change in impacts. Does that make sense? If this is correct, then we don't
need to change the permits, right? It may also help to know that an agricultural crossing that was
previously established at this location failed in September of 2018 (Hurricane Florence), so we will
just be replacing the culverts. Thanks.
Jeff Keaton, PE I Senior Water Resources Engineer
0:919.851.9986 x103 M: 919.302.6919
Wildlands Engineering, Inc.
312 West Millbrook Road, Suite 225
Raleigh, NC 27609