20220938 Ver 1_Rock Ck Mussel Survey-Reloc Compliance EM_20221213

Jennifer Burdette
From: Rebecca Stubbs <[e-mail]>
Sent: Wednesday, November 2, 2022 8:15 AM
To: Munzer, Olivia
Cc: Jennifer Burdette
Subject: Rock Creek Streambank Restoration - Mussel Survey
Attachments: Freshwater Mussel Surveys -Relocations Rock Creek Guilford County, 10-19-2022_1.pdf,
IMG_3553.JPG; IMG_3557.JPG
Good Morning Olivia,
I wanted to follow back up with you to provide the results of our mussel survey and relocation performed by Three Oaks
Engineering on October 12, 2022. Attached is their report documenting their findings.
We had our pre -construction meeting yesterday and are planning for construction to commence the week of November
14th
Please let me know if there is any other information you need to demonstrate our compliance.
Thank you!
! I
1"
MCAADAMS
Rebecca Stubbs PE
stream restoration practice lead,
water resources
direct 919.287.0740 mobile [phone]
[e-mail]
621 Hillsborough Street, Suite 500, Raleigh, NC 27603
www.mcadamsco.com
Join Our Team
O G G
*Our Raleigh office has moved! We can't wait to see you there soon.

Three Oaks Engineering, Inc.
324 Blackwell Street, Suite 1200
Durham, NC 27701
[phone]
October 19, 2022
Memorandum To: Rebecca Stubbs, PE
Stream Restoration Practice Lead
2905 Meridian Parkway
Durham NC 27713
Subject: Freshwater Mussel Surveys/Relocations in Rock Creek, Guilford County
From: Tim Savidge, Three Oaks Engineering
Proiect Overview
The Guilford County Soil and Water Conservation District and Piedmont Conservation Council is
proposing a stream bank stabilization project along Rock Creek of the Cape Fear River Basin near the city
of Whitsett, in Guilford County, North Carolina. As part of the permitting review process, the North
Carolina Wildlife Resources Commission (WRC) indicates that the state Threatened Notched Rainbow
(Venustaconcha constricts) could occur within the project impact area of Rock Creek. As such, the WRC
requested freshwater mussel surveys and relocations be conducted. These surveys/relocations were
performed on October 12, 2022, by Three Oaks Personnel Tim Savidge and Trevor Hall.
Completed Survey/Relocation Efforts
The survey limits for freshwater mussel surveys/relocations included the limits of disturbance (LOD),
plus an additional buffer of 100 meters downstream and 50 meters upstream. Visual surveys were
conducted using bathyscope (glass bottom bucket), with a total of two passes through the salvage area.
Timed searches provided Catch Per Unit Effort (CPUE) data for the species found.
Mussel surveys were conducted for 2.37 person hours of survey time, during which one native freshwater
mussel species, the Eastern Elliptio (Elliptio complanata) was found. Only one individual mussel was found
within the LOD, with all others occurring in the downstream buffer. The introduced Asian Clam (Corbicula
fluminea) and a native Fingernail Clam (Sphaeriidae) were also observed (Table 1).
Three Oaks Engineering threeoaksengineering.com

Table 1. Rock Creek Mussel Survey Results
Scientific Name Common Name Number CPUE #/hr
Freshwater Mussels
Elli lio com lanala Eastern Elli do 39
16.45/hr
Freshwater Snails and Clams
Relative
Abundance
Corbicula uminea
Asian Clam
—
Abundant
S haeriidae
Fingernail Clam
Uncommon
The mussels were relocated to an approximately 280 feet stretch of an unnamed tributary (UT) to Rock
Creek that flows into the stream just downstream of the project site (Figure 1). The reason for selecting the
UT over the Rock Creek above the project impact area, is that abundances of mussels were observed to be
higher in the UT than that section of Rock Creek, plus it is apparent that runoff coming from the adjacent
golf course greens is adversely affecting water clarity in Rock Creek. The relocated mussels are expected
to survive.
Three Oaks Engineering threeoaksengineering.com

Figure 1: Project Vicinity, Survey Reach, and Mussel Relocation Area
Freshwater Mussel Survey
Rock Creek Streambank
Restoration
Project Vicinity. Survey Reach.
and Mussel Relocation Area
Guilford County, North Carolina
°" October 2022
Jmb No_
22-337
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Jennifer Burdette
From: Munzer, Olivia <[e-mail]>
Sent: Wednesday, November 2, 2022 8:24 AM
To: Rebecca Stubbs
Cc: Jennifer Burdette
Subject: RE: [External] Rock Creek Streambank Restoration - Mussel Survey
Great, thank you. I will pass the information on to our aquatic biologist.
Olivia Munzer
NC Wildlife Resources Commission
336-269-0074
From: Rebecca Stubbs <[e-mail]>
Sent: Wednesday, November 2, 2022 8:15 AM
To: Munzer, Olivia <[e-mail]>
Cc: Jennifer Burdette <[e-mail]>
Subject: [External] Rock Creek Streambank Restoration - Mussel Survey
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
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Good Morning Olivia,
I wanted to follow back up with you to provide the results of our mussel survey and relocation performed by Three Oaks
Engineering on October 12, 2022. Attached is their report documenting their findings.
We had our pre -construction meeting yesterday and are planning for construction to commence the week of November
14th
Please let me know if there is any other information you need to demonstrate our compliance.
Thank you!
! I
Ul
MCAADAMS
Rebecca Stubbs PE
stream restoration practice lead,
water resources
direct 919.287.0740 mobile [phone]
rstubbs(cDmcadamsco.com
621 Hillsborough Street, Suite 500, Raleigh, NC 27603
www.mcadamsco.com
Join Our Team
011100
*Our Raleigh office has moved! We can't wait to see you there soon.
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
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