20201095 Ver 1_Double Rock_HENA_Impacts REV 06.10.2022_20220614

From: Davis, Erin B
To: Baker, Caroline D
Subject: FW: [External] FW: Double Rock - CAT01 UMB - LOD update
Date: Wednesday, June 15, 2022 3:10:32 PM
Attachments: Double Rock HENA Impacts REV 06.10.2022.pdf
Laserfiche Upload: Email & Attachment
DWR#: 20201095 v.l
Doc Type: Mitigation Information
-----Original Message -----
From: Browning, Kimberly D CIV USARMY CESAW (USA) <[e-mail]>
Sent: Tuesday, June 14, 2022 10:54 AM
To: Munzer, Olivia <[e-mail]>; Wilson, Travis W. <travis.wilsongancwildlife.org>
Cc: Davis, Erin B <erin.davis(0ncdenr.gov>; Haywood, Casey M CIV USARMY CESAW (USA)
<Casey.M.Haywood(ousace.army.mil>
Subject: [External] FW: Double Rock - CAT01 UMB - LOD update
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as
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Kim (Browning) Isenhour
Mitigation Project Manager, Regulatory Division I U.S. Army Corps of Engineers 1 919.946.5107
-----Original Message -----
From: Kirsten Gimbert <[e-mail]>
Sent: Friday, June 10, 2022 2:43 PM
To: Hamstead, Byron <byron [e-mail]>
Cc: Browning, Kimberly D CIV USARMY CESAW (USA) <Kimberly.D.Browning(ousace.army.mil>; Andrea
Eckardt <[e-mail]>
Subject: [URL Verdict: Neutral][Non-DoD Source] Double Rock - CAT01 UMB - LOD update
Hi Byron -
Attached is an updated Hexastylis naniflora (HENA) Impact figure for the Double Rock Mitigation Site in
Alexander County, NC. We recently had to adjust our limits of disturbance (LOD) to better accommodate
construction access and staging areas. The LOD is still within the original area assessed for all T&E species as well
as our survey area for the HENA. Please let me know if you have any questions and whether or not USFWS concurs
with these changes.
Thanks,
Kirsten Gimbert I Senior Environmental Scientist
M: 704.941.9093
Wildlands Engineering, Inc. <Blockedhttp://www.wildlandseng.com/>

1430 S. Mint St, Suite 104
Charlotte, NC 28203

9BB
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No Anticipated Impacts: Proposed
+- desgin work includes bank grading on
left stream only.
Y
Impact Area :with
ed work
will
include filhannel �-- _
and replantiativesp
Impact Area 5: Proposed work
will include channel grading and
replanting with native species.
7
µ. Impact Area 1: Proposed design�t\..,
p will include filling old channel and �"'! 972 ` �•
.. ..i •' i' �,
replanting with native species. �• 976
Existing trees may not be cleared,
however, there is a possibility of ,
damage during construction. • r _I r 707
1004
Impact Area 2: Proposed design
m��•F� �.`�'„ _ will involve clearing and grading this
`\y area in order to stablize this
.1 q channel and meet the grade of
f Stikeleather tributary.
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�1
.1
Q 7Z%
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Project Location
��•••\
HENA Population Boundary
(^^'"''•l oa
HENA 30ft Buffer
Proposed HENA Impacts
Potential Wetland Waters
Impact Area 4: Proposed work will
include bank grading and installing a step
}�
Limits of Disturbance
system to stablize headcut. Existing
n
banks are severly eroded, with minimal
1.
1�
Stream Restoration
trees.�i
Stream Enhancement 11
1 fr
^ry
"+I
Stream Preservation
,'
-•••-•••- Proposed TOB/BKF
�. ..� vo
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o
Non -Project Streams
19
• _
Topographic Contours (4')
OV,WILDLANDS
ENGINEERING 0 75 150 Feet
I I I I
HENA Proposed Impacts
Double Rock Mitigation Site
Catawba Umbrella Mitigation Bank
Catawba River Basin (03050101)
Alexander County, NC