HomeMy WebLinkAbout20190093 Ver 1_B-5654 White Oak Mussel & Fish Survey Report_20190122Freshwater Mussel & Fish Survey Report
Replacement of Bridge No. 141
White Oak Creek on SR 1550
TIP # B-5654
Johnston County, North Carolina
WBS Element # 45609.1.1
Prepared For:
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NC Department of Transportation
Raleigh, North Carolina
Contact Person:
Jared Gray
Biological Surveys Group
North Carolina Department of Transportation
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1598 Mail Service Center
Raleigh NC 27699-1598
June 30, 2016
White Oak Creek during the sur�vey effor7s
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1000 Corporate Drive, Suite 101
Hillsborough, NC 27278
Contact Person:
Tom Dickinson
Senior Project Manager
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919-732-1300
Table of Contents
1. 0 Intro du c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Waters Impacted .................................................................................................................. 1
2.1 303(d) Classification ........................................................................................................ 1
2.2 NPDES discharges ........................................................................................................... 2
3.0 Target Federally Protected Species Descriptions ................................................................ 2
3.1 Alasmidonta hete�odon (Dwarf Wedgemussel) ............................................................... 2
3.1.1. Characteristics ...........................................................................................................2
3.1.2. Distribution and Habitat Requirements .................................................................... 3
3.1.3. Threats to Species ..................................................................................................... 3
3.2 Elliptio steinstansana (Tar River Spinymussel) ............................................................... 4
3.2.1. Species Characteristics .............................................................................................. 4
3.2.2. Distribution and Habitat Requirements .................................................................... 5
3.2.3. Threats to Species ..................................................................................................... 6
4.0 Other Target Species Descriptions ....................................................................................... 6
4.1 Fusconaia masoni (Atlantic Pigtoe) ................................................................................. 6
4.1.1. Species Characteristics .............................................................................................. 6
4.1.2. Distribution and Habitat Requirements .................................................................... 6
4.1.3. Threats to Species ..................................................................................................... 6
4.2 Lasmigona subviridis (Green Floater) ............................................................................. 7
4.2.1. Species Characteristics .............................................................................................. 7
4.2.2. Distribution and Habitat Requirements .................................................................... 7
4.2.3. Threats to Species ..................................................................................................... 7
4.3 Elliptio lanceolata (Yellow Lance) .................................................................................. 7
4.3.1. Species Characteristics .............................................................................................. 7
4.3.2. Distribution and Habitat Requirements .................................................................... 8
4.3.3. Threats to Species ..................................................................................................... 8
4.4 Noturus furiosus (Carolina Madtom) ............................................................................... 8
4.4.1. Characteristics ...........................................................................................................8
4.4.2. Distribution and Habitat Requirements .................................................................... 8
4.4.3. Threats to Species ..................................................................................................... 8
5.0 Survey Efforts ...................................................................................................................... 8
5.1 Stream Conditions at Time of Survey: White Oak Creek ................................................ 9
5.2 Methodology .................................................................................................................... 9
6.0 Results ..................................................................................................................................9
7.0 Discussion/Conclusions ..................................................................................................... 10
8.0 Literature Cited .................................................................................................................. 11
Appendix A. Figures:
Figure 1: Project Vicinity & Survey Reach
Figure 2: NCNHP Element Occurrences
Figure 3: 303(d) Listed Streams and NPDES Discharges
1.0 INTRODUCTION
The North Carolina Department of Transportation (NCDOT) proposes to replace bridge number
141 over White Oak Creek on SR 1550 in Johnston County (Appendix A, Figure 1). The project
will impact White Oak Creek of the Neuse River basin. The Federally Endangered Dwarf
Wedgemussel (Alasmidonta heterodon, DWM) and Tar River Spinymussel (Elliptio
steinstansana, TSM) are listed by the U.S. Fish and Wildlife Service (USFWS) for Johnston
County. Additionally, the Atlantic Pigtoe (Fusconaia masoni), Green Floater (Lasmigona
subviridis), Yellow Lance (Elliptio lanceolata), Carolina Madtom (Noturus furiosus), and Neuse
River Waterdog (Necturus lewisi) are being considered for listing by USFWS and are known to
occur in Johnston County. The Neuse River Waterdog was discussed in a separate report
detailing targeted trapping surveys dated March 29, 2016.
According to the NC Natural Heritage Program database (NCNHP 2015), accessed Apri129,
2016, the nearest element occurrence (EO) for DWM is located in White Oak Creek/Swift
Creek/Middle Creek approximately 1.6 river miles (RM) downstream of the study area. This EO
is approximately 55 RM in length. It was first observed in March 1991 and last observed in
March 2012. The nearest EO for TSM is located in the Little River approximately 17 miles east
of the study area (>30 RM). This EO is approximately 8.2 RM in length. It was first observed in
August 1998 and last observed in September 2011. The nearest EO for Atlantic Pigtoe is located
in White Oak Creek/Swift Creek approximately 1.6 RM downstream of the study area. This EO
is approximately 40 RM in length. It was first observed in March 1991 and last observed in May
2012. The nearest EO for Green Floater is located in Swift Creek approximately 6 RM
downstream of the study area. This EO is approximately 1.2 RM in length. It was first observed
in April 1991 and not observed since then. The nearest EO for Yellow Lance is located in Swift
Creek approximately 2.8 RM downstream of the study area. This EO is approximately 8.5 RM
in length. It was first observed in August 1992 and last observed in May 2012. The nearest EO
for Carolina Madtom is located in Swift Creek approximately 18 RM downstream of the study
area. This EO is approximately 8.4 RM in length. It was first observed in June 1961 and last
observed in May 1985.
As part of the federal permitting process that requires an evaluation of potential project-related
impacts to federally protected species, Three Oaks Engineering (30aks) was contracted by
NCDOT to conduct surveys targeting DWM, TSM, Atlantic Pigtoe, Green Floater, Yellow
Lance, and Carolina Madtom.
2.0 WATERS IMPACTED
White Oak Creek is located in the Upper Neuse River subbasin of the Neuse River basin (HUC#
03020201). White Oak Creek flows approximately 2.8 RM from the subject bridge to Swift
Creek. Swift Creek flows approximately 22 RM to the Neuse River.
2.1 303(d) Classi�cation
White Oak Creek is not on the North Carolina Department of Environmental Quality (NCDEQ,
formerly NC Department of Environment and Natural Resources, NCDENR) - Division of Water
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Resources 2014 Fina1303(d) list of impaired streams at the subject bridge. Downstream (2.8
RM) of the subject bridge, Swift Creek is listed as impaired (NCDENR 2014). It is impaired due
to fair benthos (Figure 3).
2.2 NPDES discharges
There is a permitted NPDES discharge on White Oak Creek (USEPA 2016); Mount Auburn
Training Center (NPDES Permit # NC0049034) is approximately 4.5 RM miles upstream of the
study area. There are also several general stormwater NPDES permitted discharges in the
vicinity (Figure 3).
3A TARGET FEDERALLY PROTECTED SPECIES DESCRIPTIONS
3.1 Alasmidonta heterodon (Dwarf Wedgemussel)
3.1.1. Characteristics
The DWM was originally described as Unio heterodon (Lea 1829). Simpson (1914)
subsequently placed it in the genus Alasmidonta. Ortmann (1919) placed it in a monotypic
subgenus Prolasmidonta, based on the unique soft-tissue anatomy and conchology. Fuller
(1977) believed the characteristics of Prolasmidonta warranted elevation to full generic rank and
renamed the species Prolasmidonta heterodon. Clarke (1981) retained the genus name
Alasmidonta and considered Prolasmidonta to be a subjective synonym of the subgenus
Pressodonta (Simpson 1900).
The specific epithet heterodon refers to the chief distinguishing characteristic of this species,
which is the only North American freshwater mussel that consistently has two lateral teeth on the
right valve and only one on the left (Fuller 1977). All other laterally dentate freshwater mussels
in North America normally have two lateral teeth on the left valve and one on the right. The
DWM is generally small, with a shell length ranging between 25 mm (1.0 inch) and 38 mm (1.5
inches). The largest specimen reported by Clarke (1981) was 56.5 mm (2.2 inches) long, taken
from the Ashuelot River in New Hampshire. The periostracum is generally olive green to dark
brown; nacre bluish to silvery white, turning to cream or salmon colored towards the umbonal
cavities. Sexual dimorphism occurs in DWM, with the females having a swollen region on the
posterior slope, and the males are generally flattened. Clarke (1981) provides a detailed
description of the species.
Nearly all freshwater mussel species have similar reproductive strategies; a larval stage
(glochidium) becomes a temporary obligatory parasite on a fish. Many mussel species have
specific fish hosts, which must be present to complete their life cycle. Based upon laboratory
infestation experiments, Michaelson and Neves (1995) determined that potential fish hosts for
the DWM in North Carolina include the Tessellated Darter (Etheostoma olmstedi) and the
Johnny Darter (E. nigrum). McMahon and Bogan (2001) and Pennak (1989) should be consulted
for a general overview of freshwater mussel reproductive biology.
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3.1.2. Distribution and Habitat Requirements
The historic range of the DWM is confined to Atlantic slope drainages from the Peticodiac River
in New Brunswick, Canada, south to the Neuse River, North Carolina. Occurrence records exist
from at least 701ocations, encompassing 15 major drainages, in 11 states and 1 Canadian
Province (USFWS 1993). When the recovery plan for this species was written, the DWM was
believed to have been extirpated from all but 361ocalities, 14 of them in North Carolina
(USFWS 1993). The most recent assessment (2013 5-Year Review) indicates that the DWM is
currently found in 16 major drainages, comprising approximately 75 "sites" (one site may have
multiple occurrences). At least 45 of these sites are based on less than five individuals or solely
on relict shells. It appears that the populations in North Carolina, Virginia, and Maryland are
declining as evidenced by low densities, lack of reproduction, or inability to relocate any
individuals in follow-up surveys. Populations in New Hampshire, Massachusetts, and
Connecticut appear to be stable, while the status of populations in the Delaware River watershed
affected by the recent floods of 2005 are still being studied (USFWS 2013).
Strayer et al. (1996) conducted range-wide assessments of remaining DWM populations, and
assigned a population status to each of the populations. The status rating is based on range size,
number of individuals and evidence of reproduction. Seven of the 20 populations assessed were
considered "poor," and two others are considered "poor to fair" and "fair to poor," respectively.
In North Carolina, populations are found in portions of the Neuse and Tar River basins; however,
they are believed to have been extirpated from the main-stem of the Neuse River.
The DWM inhabits creeks and rivers of varying sizes (down to approximately two meters wide),
with slow to moderate flow. A variety of preferred substrates have been described that range
from coarse sand, to firm muddy sand to gravel (USFWS 1993). In North Carolina, DWM often
occur within submerged root mats along stable streambanks. The wide range of substrate types
used by this species suggests that the stability of the substrate is likely as important as the
composition.
3.1.3. Threats to Species
The cumulative effects of several factors, including sedimentation, point and non-point
discharge, and stream modifications (impoundments, channelization, etc.) have contributed to the
decline of this species throughout its range. With the exception of the Neversink River
population in New York, which has an estimated population of over 80,000 DWM individuals,
all of the other populations are generally small in numbers and restricted to short reaches of
isolated streams. The low numbers of individuals and the restricted range of most of the
surviving populations make them extremely vulnerable to extirpation from a single catastrophic
event or activity (Strayer et al. 1996). Catastrophic events may consist of natural events such as
flooding or drought, as well as human influenced events such as toxic spills associated with
highways, railroads, or industrial-municipal complexes.
Siltation resulting from substandard land-use practices associated with activities such as
agriculture, forestry, and land development has been recognized as a major contributing factor to
degradation of mussel populations. Siltation has been documented to be extremely detrimental
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to mussel populations by degrading substrate and water quality, increasing potential exposure to
other pollutants, and by direct smothering of mussels (Ellis 1936, Marking and Bills 1979).
Sediment accumulations of less than one inch have been shown to cause high mortality in most
mussel species (Ellis 1936). In Massachusetts, a bridge construction project decimated a
population of the DWM because of accelerated sedimentation and erosion (Smith 1981).
Sewage treatment effluent has been documented to significantly affect the diversity and
abundance of mussel fauna (Goudreau et al. 1988). Goudreau et al. (1988) found that recovery
of mussel populations may not occur for up to two miles below points of chlorinated sewage
effluent.
The impact of impoundments on freshwater mussels has been well documented (USFWS 1992a,
Neves 1993). Construction of dams transforms lotic habitats into lentic habitats, which results in
changes in aquatic community composition. The changes associated with inundation adversely
affect both adult and juvenile mussels, as well as fish community structure, which could
eliminate possible fish hosts for upstream transport of glochidia. Muscle Shoals on the
Tennessee River in northern Alabama, once the richest site for naiads (mussels) in the world, is
now at the bottom of Wilson Reservoir and covered with 19 feet of muck (USFWS 1992b).
Large portions of all of the river basins within the DWM's range have been impounded and this
is believed to be a major factor contributing to the decline of the species (Master 1986).
The introduction of exotic species such as the Asian Clam (Corbicula fluminea) and Zebra
Mussel (Dreissena polymorpha) has also been shown to pose significant threats to native
freshwater mussels. The Asian Clam is now established in most of the major river systems in the
United States (Fuller and Powell 1973), including those streams still supporting surviving
populations of the DWM. Concern has been raised over competitive interactions for space, food
and oxygen with this species and native mussels, possibly at the juvenile stages (Neves and
Widlak 1987, Alderman 1995). The Zebra Mussel, native to the drainage basins of the Black,
Caspian and Aral Seas, is an exotic freshwater mussel that was introduced into the Great Lakes
in the 1980s and has rapidly expanded its range into the surrounding river basins, including those
of the South Atlantic slope (O'Neill and MacNeill 1991). This species competes for food
resources and space with native mussels, and is expected to contribute to the extinction of at least
20 freshwater mussel species if it becomes established throughout most of the eastern United
States (USFWS 1992b). The Zebra Mussel is not currently known from any river supporting
DWM population, nor the Neuse River basin.
3.2 Elliptio steinstansana (Tar River Spinymussel)
3.2.1. Species Characteristics
The TSM grows to a maximum length of 60 millimeters. Short spines are arranged in a radial
row anterior to the posterior ridge on one valve and symmetrical to the other valve. The shell is
generally smooth in texture with as many as 12 spines that project perpendicularly from the
surface and curve slightly ventrally. However, adult specimens tend to lose their spines as they
mature (USFWS 1992a). The smooth, orange-brown to dark brown periostracum may be rayed
in younger individuals. The shell is significantly thicker toward the anterior end and the nacre is
usually pink in this area. The posterior end of the shell is thinner with an iridescent bluish white
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color. Two or more linear ridges, originating within the beak cavity and extending to the ventral
margin, can be found on the interior surface of the shell. The distance between these ridges
widens toward the ventral margin. Johnson and Clarke (1983) provide additional descriptive
material.
Little is known about the reproductive biology of the TSM (USFWS 1992c); however, nearly all
freshwater mussel species have similar reproductive strategies, which involve a larval stage
(glochidium) that becomes a temporary obligatory parasite on a fish. Many mussel species have
specific fish hosts, which must be present to complete their life cycle. The TSM is probably a
tachytictic reproducer with gravid females present at some time from April through August
(Widlak 1987). The glochidia have not been described. Eads and Levine (2008), and Eads et al.
(2008) identified the following fish species as suitable hosts: Bluehead Chub (Nocomis
leptocephalus), Pinewoods Shiner (Lythrurus matutinus), Satinfin Shiner (Cyprinella
analostana), and White Shiner (Luxilus albeolus). McMahon and Bogan (2001) and Pennak
(1989) should be consulted for a general overview of freshwater mussel reproductive biology.
3.2.2. Distribution and Habitat Requirements
Previously this mussel was believed to be endemic to the Tar-Pamlico River basin and probably
ranged throughout most of the basin before the area was settled during the 1700s (NC Scientific
Council on Mollusks 2011). Historically, the TSM was collected in the Tar River from near
Louisburg in Franklin County to Falkland in Pitt County (approximately 78 RM). By the mid-
1960s, its known range had been reduced to the main channel of the Tar River from Spring Hope
in Nash County to Falkland in Pitt County (Shelley 1972, Clarke 1983). By the early 1980s, its
range in the Tar River was restricted to only 12 miles of the river in Edgecombe County (Clarke
1983). It was last observed (2 individuals) in the river in 2001 within an extensive sandbar
habitat in Edgecombe County (unpublished data, NCWRC Aquatics Database). It is currently
found in three streams, Shocco, Sandy/Swift and Fishing/Little Fishing creeks in the Tar-Pamlico
River basin (unpublished data, NCWRC Aquatics Database). In 1998, the species was found in
Johnston County in the Little River, a tributary to the Neuse River. Only a few individuals have
been found in the Little River in subsequent years (unpublished data, NCWRC Aquatics
Database).
The preferred habitat of the TSM in the Tar-Pamlico River basin was described as relatively fast
flowing, well-oxygenated, circumneutral pH water in sites prone to significant swings in water
velocity, with a substrate comprised of relatively silt-free loose gravel and/or coarse sand
(Adams et al., 1990). Various species associates, which are good indicators for the presence of
the TSM, include (in decreasing order of association) Atlantic Pigtoe, Yellow Lance, Yellow
Lampmussel (Lampsilis cariosa), Notched Rainbow (Villosa constricta), Triangle Floater
(Alasmidonta undulata) and Creeper (Strophitus undulatus)(Adams et al., 1990). Johnson (1970)
stated that the Atlantic Pigtoe appeared to be closely associated with the James River
Spinyrnussel (Pleurobema collina) in the James River basin. This same close association is true
for the TSM and Atlantic Pigtoe. In habitats which have not been significantly degraded in the
Tar-Pamlico River basin, the presence of Atlantic Pigtoe is the best indicator of the potential
presence of TSM (NC Scientific Council on Mollusks 2011).
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3.2.3. Threats to Species
Threats to the TSM are similar to those described for the DWM and have contributed to the
decline of this species throughout its range. All of the remaining TSM populations are generally
small in numbers and restricted to short reaches of isolated streams. The low numbers of
individuals and the restricted range of most of the surviving populations make them extremely
vulnerable to extirpation from a single catastrophic event.
4.0 OTHER TARGET SPECIES DESCRIPTIONS
4.1 Fusconaia masoni (Atlantic Pigtoe)
4.1.1. Species Characteristics
The Atlantic Pigtoe was described by Conrad (1834) from the Savannah River in Augusta,
Georgia. Although larger specimens exist, the Atlantic Pigtoe seldom exceeds 50 mm in length.
Except in headwater stream reaches, where specimens may be elongated, this species is tall
relative to its length. The hinge ligament is relatively short and prominent. The periostracum is
normally brownish, has a parchment texture, and young individuals may have greenish rays
across the entire shell surface. The posterior ridge is biangulate. The interdentum in the left
valve is broad and flat. The anterior half of the valve is thickened compared with the posterior
half, and, when fresh, nacre in the anterior half of the shell tends to be salmon colored, while
nacre in the posterior half tends to be more iridescent. The shell has full dentation. In addition
to simple papillae, branched and arborescent papillae are often seen on the incurrent aperture. In
females, salmon colored demibranchs are often seen during the spawning season. When fully
gravid, females use a114 demibranchs to brood glochidia (VDGIF 2014).
4.1.2. Distribution and Habitat Requirements
The Atlantic Pigtoe range extends from the Ogeechee River Basin in Georgia north to the James
River Basin in Virginia (Johnson 1970). The general pattern of distribution indicates that the
species is currently limited to headwater areas of drainages and most populations are represented
by few individuals. In North Carolina, it was once found in every Atlantic Slope river basin with
the exception of the Waccamaw. With the exception of the Tar River, it has not been found in
the mainstem of these rivers in recent years (Savidge et al. 2011). It is listed as Endangered in
Georgia, South Carolina, and North Carolina, and as Threatened in Virginia. It has a
Natureserve rank of G2 (imperiled).
The Atlantic Pigtoe occurs in medium size streams to large rivers, but has experienced major
declines throughout its entire range. The preferred habitat is a substrate composed of gravel and
coarse sand, usually at the base of riffles, however, it can be found in a variety of other substrates
and habitat conditions.
4.1.3. Threats to Species
Threats to the Atlantic Pigtoe are similar to those described for the DWM and have contributed
to the decline of this species throughout its range. All of the remaining Atlantic Pigtoe
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populations are generally small in numbers and restricted to short reaches of isolated streams.
The low numbers of individuals and the restricted range of most of the surviving populations
make them extremely vulnerable to extirpation from a single catastrophic event.
4.2 Lasmigona subviridis (Green Floater)
4.2.1. Species Characteristics
The Green Floater was described by Conrad (1835) from the Schuykill River in Lancaster
County, Pennsylvania. The small mussel species has a thin, slightly inflated subovate shell that
is narrower in front, higher behind. The dorsal margin forms a blunt angle with the posterior
margin. The shell is dull yellow or tan to brownish green, usually with concentrations of dark
green rays.
4.2.2. Distribution and Habitat Requirements
The Green Floater occurs along the Atlantic slope from the Savannah River in Georgia north to
the Hudson River in New Yark, as well as in the "interior" basins (New, Kanawah, and Watagua
Rivers) of the Tennessee River basin. It has experienced major declines throughout its entire
range. Based on preliminary genetics research, the southern populations of the Green Floater
(Tar-Pamlico, Neuse, and Yadkin/Pee Dee River Basins) appear to be genetically distinct from
populations from the Roanoke River to the north and west (Morgan Railey and Arthur Bogan,
North Carolina Museum of Natural Sciences, 2007 Personal Communication). Further research
is needed to determine if these differences warrant classification of the southern populations as a
distinct species. It occurs in small size streams to large rivers, in quiet waters such as pools, or
eddies, with gravel and sand substrates.
4.2.3. Threats to Species
Threats to the Green Floater are similar to those described for the DWM and have contributed to
the decline of this species throughout its range. All of the remaining Green Floater populations
are generally small in numbers and restricted to short reaches of isolated streams. The low
numbers of individuals and the restricted range of most of the surviving populations make them
extremely vulnerable to extirpation from a single catastrophic event.
4.3 Elliptio lanceolata (Yellow Lance)
4.31. Species Characteristics
The Yellow Lance was described from the Tar River at Tarboro, North Carolina by L Lea in
1828. This species differs from other lance-shaped Elliptios by having a"waxy" bright yellow
periostracum that lacks rays. The posterior ridge is distinctly rounded and curves dorsally
towards the posterior end.
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4.3.2. Distribution and Habitat Requirements
This species is distributed from the Neuse River Basin north to the Rappahannock. It is in
considerable decline throughout its range. Extant populations occur in the Neuse, Tar/Pamlico,
Chowan and York River basins. This species is found in small streams to large rivers in
substrates primarily consisting of clean sand, and occasionally gravel.
4.3.3. Threats to Species
Threats to the Yellow Lance and many other species are similar to those described above for the
DWM. This species is a Federal Species of Concern and is listed as Endangered in North
Carolina. Williams et al. (1993) list this species as Endangered. There appears to be sufficient
data to warrant elevation of the Yellow Lance to Candidate status in the very near future (John
Fridell, Recovery Biologist USFWS, Personal Communication).
4.4 Noturus furiosus (Carolina Madtom)
4.4.1. Characteristics
The Carolina Madtom (a small catfish) was described at Millburnie, near Raleigh, NC in the
Neuse River by (Jordan 1889). The Carolina Madtom reaches a maximum size of 132 mm (5.2
inches). Compared to other madtoms within its range, it has a relatively short, stout body and a
distinctive color pattern of 3-4 dark saddles along its back that connect a long black stripe on the
side running from the snout to the tail.
4.4.2. Distribution and Habitat Requirements
The Carolina Madtom is endemic to the Piedmont/Inner Coastal Plain portion of the Tar/Pamlico
and Neuse River basins. It occurs in creeks and small rivers in habitats generally consisting of
very shallow riffles with little current over coarse sand and gravel substrate (Lee et al. 1980). It
is generally rare throughout its range and is apparently in decline.
4.4.3. Threats to Species
Because of its limited distribution, Carolina Madtom is listed as Special Concern and is Proposed
Threatened in North Carolina. Identified threats to the species include water pollution and
construction of impoundments (Burr et al. 1989).
5.0 SURVEY EFFORTS
Surveys were conducted by 30aks personnel Tim Savidge (Permit # 16-ES0034), Nathan
Howell, and Hannah Slyce on May 26, 2016.
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5.1 Stream Conditions at Time of Survey: White Oak Creek
This section of White Oak Creek exists as a multi-channel stream that meanders through a
Beaver (Castor canadensis) dam created wetland swamp/marsh complex that ranges from 100-
200 feet wide below the bridge. There are multiple small dams throughout this portion of the
creek, however, some level of flow is maintained. The substrate consists of sand with clay banks
and occasional accumulations of detritus. Above the bridge, a single channel approximately 10-
14 feet wide meanders through a floodplain, which is forested on the left descending side and
bordered by pasture on the right. At the time of the survey, water levels ranged from a few
inches to three feet deep and the water was a light tannic color.
5.2 Methodology
Mussel surveys were conducted from approximately 1,312 feet (400 meters) downstream of the
respective bridge crossing to approximately 328 feet (100 meters) upstream of the crossing for a
distance of approximately 1,640 feet (500 meters) (Figure 1). Areas of appropriate habitat were
searched, concentrating on the habitats preferred by the target species. The survey team spread
out across the creek into survey lanes. Visual surveys were conducted using glass bottom view
buckets (bathyscopes). Tactile methods were employed, particularly in streambanks under
submerged rootmats. All freshwater bivalves were recorded and returned to the substrate.
Timed survey efforts provided Catch Per Unit Effort (CPUE) data for each species. Relative
abundance for freshwater snails and freshwater clam species were estimated using the following
criteria:
➢(VA) Very abundant > 30 per square meter
➢(A) Abundant 16-30 per square meter
➢(C) Common 6-15 per square meter
➢(U) Uncommon 3-5 per square meter
➢(R) Rare 1-2 per square meter
➢(P-) Ancillary adjective "Patchy" indicates an uneven distribution of the species within the
sampled site.
During the mussel survey effort, the presence of preferred habitats for the Carolina Madtom were
assessed and if conditions were appropriate, targeted visual surveys were conducted by
overturning rocks and debris in these areas.
6.0 RESULTS
A total of 7.0 person hours of survey time were spent in the reach, with two species of freshwater
mussels, the Eastern Elliptio (Elliptio complanata) and Paper Pondshell (Utterbackia imbecillis)
being found in relatively high densities (Table 1). Other mollusk species found during the
survey included the Asian Clam (Corbicula fluminea) and the aquatic snail, Pointed Campeloma
(Campeloma decisum).
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Table 1. CPUE for Freshwater Mussels in White Oak Creek
Abundance/
Scientific Name Common Name # live CPUE
Freshwater Mussels CPUE
lli tio com lanata astern Elli tio 227 32.43/hr
Utterbackia imbecillis aper Pondshell 3 0.43/hr
Relative
Freshwater Snails and Clams Abundance
Corbicula uminea sian Clam � PC
Campeloma decisum ointed Campeloma � PC
7.0 DISCUSSION/CONCLUSIONS
The results indicate that the study area supports a freshwater mussel and fish fauna. Neither the
DWM nor TSM were found during the surveys. While the other target species were not found
during these surveys, appropriate habitat is present; thus there is the potential for additional
species to occur within the study area. However, a man-made impoundment (Austin Pond)
occurs on White Oak Creek approximately one mile downstream of the project area. This
impoundment could be a barrier to colonization of the study area portion of White Oak Creek by
many of the target species, which are known to occur further downstream in Swift Creek.
Based on these survey results, impacts to the target species are unlikely to occur in the study
area. Strict adherence to erosion control standards should minimize the potential for any adverse
impacts to occur. Biological conclusions on potential impacts from the project to the target
species are provided below.
The USFWS is the regulating authority for Section 7 Biological Conclusions and as such, it is
recommended that they be consulted regarding their concurrence with the finding of this
document.
Biological Conclusion Dwarf Wedgemussel: May Affect/Not Likely to Adversely Affect
Biological Conclusion Tar River Spinymussel: May Affect/Not Likely to Adversely Affect
While the following species are not currently federally protected and biological conclusions are
not necessary at the time of the writing of this report, if these species were to receive federal
protection, appropriate biological conclusions are as follows:
Biological Conclusion Atlantic Pigtoe: May Affect/Not Likely to Adversely Affect
Biological Conclusion Green Floater: May Affect/Not Likely to Adversely Affect
Biological Conclusion Yellow Lance: May Affect/Not Likely to Adversely Affect
Biological Conclusion Carolina Madtom: May Affect/Not Likely to Adversely Affect
B-5654 White Oak Creek Mussel & Fish Survey Report June 2016
Job# 16-306 Page 10
8.0 LITERATURE CITED
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Conservation status of the freshwater mussels of the United States and Canada. Fisheries
18 (9): 6-22.
B-5654 White Oak Creek Mussel & Fish Survey Report June 2016
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APPENDIX A
Figures
B-5654 White Oak Creek Mussel & Fish Survey Report June 2016
Job# 16-306 Page 15
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oate Apri12016
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Johnston Counly, Norlh Carolina
oate Apri12016
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Johnston Counly, Norlh Carolina
oate Apri12016
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16-306
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