HomeMy WebLinkAboutChapter 5 - 03010107Roa
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5.1
CHAPTER 5
Lower roanoke
river SubbaSin
HUC 03010107
Includes: Roanoke River, Quankey Creek, Cashie River & Welch Creek
SubbaSin at a GLance
countieS:
Bertie, Halifax, Martin, Northampton & Washington
MunicipaLitieS:
Askewville, Aulander, Garysburg, Gaston, Halifax, Hamilton, Hassell, Hodgood, Jackson,
Kelford, Lewiston Woodville, Oak City,
Plymouth, Rich Square, Roanoke Rapids,
Roxobel, Scotland Neck, Weldon, Williamston
& Windsor,
ecoreGionS:
Northern Outer Piedmont, Rolling Coastal
Plain, Southeastern Floodplains and Low Terraces, Mid-Atlantic Flatwoods, Mid-Atlantic
Floodplains and Low Terraces & Chesapeake-
Pamlico Lowlands and Tidal Marshes
perMitted FaciLitieS:
NPDES Dischargers: ..............................24
Major .............................................................7 Minor ...........................................................11 General .........................................................6
NPDES Non-Dischargers: ........................11
Stormwater: ............................................58
General .......................................................50
Individual .......................................................8
Animal Operations: .................................46
Aquaculture .................................................45
popuLation:
2010 Census .....................................78,568
2006 Land cover:
Open Water .................................................1.7%
Developed ...................................................6.1%
Forest .......................................................25.9%Agriculture .................................................26.0%Wetlands ...................................................29.6%
Barren Land ................................................0.1%
Shrub/Grassland .......................................10.5%
SubbaSin water QuaLity overview
The Lower Roanoke River Subbasin is the eastern most subbasin
and empties into Albemarle Sound. The subbasin contains three
Impaired stream: one segment of Quankey Creek is Impaired for
biological integrity; Welch Creek is Impaired for dioxin and low
pH. One of the two most downstream segments of the Roanoke
River is Impaired for low DO and the other is Impaired for dioxin.
During this basinwide cycle (2004-2009), the subbasin
experienced a moderate drought in 2005 and 2006 as well as
a prolonged drought between 2007 and 2008. Monitoring the
biological community showed only a small percent declined
and some improved. There were no major ambient monitoring
violations.
The John H. Kerr Dam and Reservoir Section 216 Feasibility
Study project is partially located in this subbasin. The project
area also includes HUCs 03010102 and 03010106. The
study has focused on examining the feasibility of addressing
downstream environmental resource concerns in the Lower
Roanoke River drainage area through changes in operations
or structures at the John H. Kerr Dam and Reservoir. Along
with USACE, the non-federal cost sharing partners for this study
are Virginia, and North Carolina. The process includes forming
diverse workgroups, conducting a wide range of studies and
developing a plan of recommendations. The project is currently
completing phase 2 and beginning phase 3, the final phase. A
more detailed description of the project is found in the Additional
Study section in Chapter 3.
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5.2
FiguRe 5-1: LoweR Roanoke RiveR suBBasin (03010107)
HALIFAXWARREN
NorlinaMacon SmithCrSixpoundCrJordanCr
Hub q u a rte r C r
ROA038A
NB113
NB37
NB51 NB52N6400000NB90
NORTHAMPTON
HERTFORD
BERTIE
HERTFORD
PITT
MARTIN
WAS
HING
TO
N
C
H
OW
A
N
Roanoke
Rapids
Aulander
Roxobel
Windsor
Oak
City
JacksonRich
Square
Williamston
Jamiesville
Scottland
Neck
Plymouth
ROANOKERIV
ER
Conoconna
r
a
S
w
ROANOKERIVER
R
O
A
N
O
KE
RIVER
QuankeyCr
KehukeeSw
C
a
shieRi
ConohoCr
RoquistCr
Hogg
a
r
d
Mill
C
r
HardisonMillCr
CashieRiver
WelchCr N9250000
N9600000
N9685000
NB69
N8550000
NB67
NB80 NB78
NB76
NB93
N8950000
NB75
N8300000
NB55ROA0491A
ROA0492A
N8200000
NB53
N7300000NF46
NB91
NB59NB60
NB59
BEAUFORT
Lower
Roanoke
River
Subbasin
(03010107)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY#0Ek"Y
USGS
Gage
Stations
!<
RAMS
(`09-`10)
¢¡
RAMS
(`07-`08)
¢¡
Lake
Stations
^
Benthos
"à)
Fish
Community
[¡
Ambient
¢¡
NC
Division
of
Water
Quality
BasinwidePlanning
Unit
August
2011 ¯
0
4
8
12
16
2
Miles
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5.3
water QuaLity data SuMMary For thiS SubbaSin
Monitoring stream flow, aquatic biology and chemical/physical parameters is a large part of the basinwide
planning process. More detailed information about DWQ monitoring and the effects each parameter has on
water quality is discussed in Chapters 2 and 3 of the Supplemental Guide to North Carolina’s Basinwide
Planning document.
StreaM FLow
The basin experienced prolonged droughts from 1998-2002 and again from 2007-2008, with moderate
droughts in 2005 and 2006 (Figure 5-2). More detail about flows in the Roanoke River Basin can be found in
the 2010 Roanoke River Basinwide Assessment Report produced by DWQ-Environmental Science Section.
FiguRe 5-2: YeaRLY FLow Rates (CFs) oF tHe usgs gage stations in tHe LoweR
Roanoke RiveR suBBasin Between 1997 & 2009
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
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2080500 208111310
Indicates periods of drought in the Roanoke River Basin
From Left to Right:
• 2080500: Roanoke
River at Roanoke
Rapids
• 208111310: Cashie
River (Windsor)
bioLoGicaL data
Biological samples were collected mostly during the spring and summer months of 2009 by the DWQ-
Environmental Sciences Section as part of the five year basinwide sampling cycle, in addition to special
studies. Overall, 10 biological sampling sites were monitored within the Roanoke Rapids Subbasin. The
ratings for each of the sampling stations can be seen in Appendix 5-B.
Benthic Macroinvertebrate Sampling
Each benthic station monitored during the current cycle is shown in
Figure 5-3 and color coded based on the current rating. Each of the
sites are discussed in more detail in the watershed section below. Figure
5-5 is a comparison of benthic site ratings sampled during the last two
basinwide cycles to indicate if there are any overall shifts in ratings.
Benthic ratings from this cycle are similar to those received during the
previous cycle indicating a stable community.
benthic SaMpLinG SuMMary
£Total Stations Monitored 9
£Total Samples Taken 9
£Number of New Stations 0
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5.4
FiguRe 5-3: BentHiC stations CoLoR Coded BY CuRRent Rating in
tHe LoweR Roanoke RiveR suBBasin
Benthos 2004-2009
Excellent/Natural
Good
Good-Fair/Moderate
Fair
Not Impaired
Not Rated
FiguRe 5-4: CuRRent BentHiC site Ratings
Excellent/Natural
Good
Good-Fair/Moderate
Fair
Poor/Severe
Not Rated
Not Impaired
FiguRe 5-5: CHange in BentHiC site Ratings
Improved
Declined
No Change
New Station
Fish Community Sampling
Each fish community station monitored during the current cycle is shown
in Figure 5-6 and color coded based on the current rating. The site is
discussed in more detail in the watershed section below. Figure 5-7
shows the percentages of each rating given during this sampling cycle
within this subbasin. Figure 5-8 is a comparison of fish community site
ratings sampled during the last two cycles to determine if there are any
overall watershed shifts in ratings. Overall, the community at this site is
stable.
FiSh coM. SaMpLinG SuMMary
£Total Stations Monitored 1
£Total Samples Taken 1
£Number of New Stations 0
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5.5
FiguRe 5-6: FisH CommunitY stations CoLoR Coded BY CuRRent
Rating in tHe LoweR Roanoke RiveR suBBasin
Fish 2004-2009
Excellent
Good
Good-Fair
Fair
FiguRe 5-7: CuRRent FisH Comm site Ratings
Excellent
Good
Good-Fair
Fair
Poor
Not Rated
Not Impaired
FiguRe 5-8: CHange in FisH Comm site Ratings
Improved
Declined
No Change
New Station
For more information about biological data in this subbasin, see the 2010 Roanoke River Basinwide
Assessment Report. Detailed data sheets for each sampling site can be found in Appendix 5-B.
aMbient data
The ambient data are used to develop use support ratings every two years, which are then reported to the
EPA via the Integrated Report (IR). The IR is a collection of all monitored waterbodies in North Carolina and
their water quality ratings. The most current IR is the 2010 version and is based on data collected between
2004 and 2008. The ambient data reported in this basin plan were collected between 2005 and 2009 and will
be used for the 2012 IR. If a waterbody receives an Impaired rating, it is then placed on the 303(d) Impaired
Waters List. The Roanoke River Basin portion of the 2010 IR can be found in Appendix 5-A and the full 2010
IR can be found on the Modeling & TMDL Unit’s website.
Seven Ambient Monitoring System (AMS) station is located in the Roanoke Rapids subbasin (see Figure 5-1
for the station locations). During the current sampling cycle (January 2005 and December 2009), samples
were collected for all parameters on a monthly basis except metals which were sampled quarterly until May
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5.6
2007 when metals sampling was suspended. For more information about the ambient monitoring, parameters,
how data are used for use support assessment and other information, see Chapter 2 of the Supplemental
Guide to North Carolina’s Basinwide Planning.
Long Term Ambient Monitoring
The following discussion of ambient monitoring parameters of concern include graphs showing the median
and mean concentration values for each ambient station in this subbasin by specific parameter over a 13 year
period (1997-2009). The geometric mean is a type of mean or average, which indicates the central tendency
or typical value of a set of numbers. The graphs are not intended to provide statistically significant trend
information, but rather an idea of how changes in land use or climate conditions can affect parameter readings
over the long term. The difference between median and mean results indicate the presence of outliers in the
data set. Box and whisker plots of individual ambient stations were completed by parameter for data between
2005 and 2009 by DWQ’s Environmental Sciences Section (ESS) and can be found in the Roanoke River
Basin Ambient Monitoring System Report.
pH
Three out of the seven stations measured samples below the standard range in 1% to 4% of samples taken
during this cycle. This is represented in Figure 5-9 by the yellow dots. No samples measured above the
standard range which are represented by the green dots (0%). Figure 5-10 shows the mean and median pH
levels for all samples taken over the course of 13 years in the Lower Roanoke River Subbasin. The pH pattern
seen in this subbasin during this time period appears to be closely linked with flow levels. As flow levels go up
pH levels appear to fall. This could be caused by the saltwater wedge traveling more upstream during these
times.
FiguRe 5-9: PeRCentage oF
samPLes exCeeding tHe PH
standaRds (2005-2009)
0%
<7%
7%-10%
>10%
FiguRe 5-10: summaRized PH vaLues FoR aLL data CoLLeCted at
amBient samPLing stations in HuC 03010107
6
6.5
7
7.5
8
8.5
9
pH
Median Mean
* NC pH Standard: Between 6.0 and 9.0 su for Class C; 4.3 and 9.0 for SW
Turbidity
One of the seven stations in the Roanoke Rapids subbasin exceeded the state’s turbidity standard in 6 percent
of samples, as seen in Figure 5-11 indicated by the yellow dot. Possible sources of the elevated turbidity levels
are discussed in the 10-digit watershed section. Figure 5-12 shows the mean and median turbidity levels for
all samples taken over the course of 13 years in the Lower Roanoke River subbasin. The yearly averages are
well below the state standard of 50 NTUs but have slightly increased over the years.
While some erosion is a natural phenomenon, human land use practices may accelerate the process to
unhealthy levels for aquatic life. Construction sites, mining operations, agricultural operations, logging
operations and excessive stormwater flow off impervious surfaces are all potential sources. Turbidity
exceedances demonstrate the importance of protecting and conserving stream buffers and natural areas.
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5.7
FiguRe 5-11: PeRCentage oF
samPLes exCeeding tHe tuRBiditY
standaRd (2005-2009)
0%
<7%
7%-10%
>10%
FiguRe 5-12: summaRized tuRBiditY vaLues FoR aLL data CoLLeCted at
amBient samPLing stations in HuC 03010107
0
2
4
6
8
10
12
14
16
Tu
r
b
i
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(
N
T
U
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Median Mean
* NC Turbidity Standard: 50 NUT
Dissolved Oxygen
As seen in Figure 5-13, one of the seven sites exceeded the DO standard in 2% of samples during this moni-
toring cycle. Figure 5-14 shows the mean and median of DO levels for all samples taken over the course of 13
years in the Lower Roanoke River subbasin. These averages are well within the normal DO range; however,
a slight decline is seen in the last four years.
FiguRe 5-13: PeRCentage oF
samPLes exCeeding tHe do
standaRd (2005-2009)
0%
<7%
7%-10%
>10%
FiguRe 5-14: summaRized do vaLues FoR aLL data CoLLeCted at
amBient samPLing stations in HuC 03010107
0
1
2
3
4
5
6
7
8
9
10
DO
(
m
g
/
l
)
Median Mean
* NC DO Standard: Not < 5 mg/l daily avg. or not < 4 mg/l instantaneous
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5.8
Fecal Coliform Bacteria
Fecal coliform bacteria (FCB) occurs in water as a result of nonpoint
sources such as animal waste from wildlife, farm animals and/or
pets, as well as from sanitary sewer overflows (SSOs). The FCB
standard for freshwater streams is not to exceed the geometric mean
of 200 colonies/100 ml, or 400 colonies/100 ml in 20% of the samples
where five samples have been taken in a span of 30 days (5-in-30).
Only results from a 5-in-30 study are used to indicate whether the
stream is Impaired or Supporting. Waters with a use classification
of B (primary recreational waters) receive priority for 5-in-30 studies.
Other waters are studied as resources permit.
As seen in Figure 5-15, all seven sites had less than 6% of samples
over 400 colonies/100 ml. Possible sources of elevated levels of FCB
are discussed in the subwatershed sections. Figure 5-16 shows the
yearly geometric mean (calculated average) for all samples taken
over the course of 13 years in the Lower Roanoke River subbasin.
The highest yearly geometric mean was recorded in 2001 (56 colonies/100 ml). The figure also includes the
yearly average stream flow, as seen in Figure 5-2, to show how flow can be closely linked to FCB levels.
FiguRe 5-16: summaRized FeCaL CoLiFoRm BaCteRia vaLues FoR aLL data CoLLeCted at
amBient samPLing stations in HuC 03010107 witH oveRLaYing FLow
0
10
20
30
40
50
60
FC
B
(
c
o
l
o
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s
/
1
0
0
m
l
)
Geometricmean
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
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2080500 208111310
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18000
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2080500 208111310USGS Flow Gage Stations:
0
2000
4000
6000
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12000
14000
16000
18000
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2080500 208111310
0
200
400
600
800
1000
1200
1400
1600
1800
2000
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2068500207050020710002074000
* NC FCB Standard (5-in-30 data only): Geomean not > 200/100 ml or 400/100 ml in 20% of samples
Additional information about possible causes of parameters discussed above for particular stations, see the
stream write ups below. For more information regarding any of the parameters listed above, see Section
3.3 of the Supplemental Guide to North Carolina’s Basinwide Planning. For additional information about
ambient monitoring data collected in this river basin, see the Roanoke River Basin Ambient Monitoring
System Report.
FiguRe 5-15: PeRCentage oF samPLes
witH eLevated FCB LeveLs (2005-
2009)
<6.9%
6.9%-10%
10.1%-20.0%
>20.0%
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5.9
underStandinG the data
Biological & Ambient Ratings Converted to Use Support Categories
Biological (benthic and fish community) samples are given a
bioclassification/rating based on the data collected at the site
by DWQs Environmental Sciences Section (ESS). These
bioclassifications include Excellent, Good, Good-Fair, Not
Impaired, Not Rated, Fair and Poor. For specific methodology
defining how these rating are given see Benthic Standard
Operating Procedures (SOP) or the Fish Community SOP.
Once a rating is given, it is then translated into a Use Support
Category (see Figure 5-17).
Ambient monitoring data are analyzed based on the percent of
samples exceeding the state standard for individual parameters
for each site within a five year period. In general, if a standard is
exceeded in greater than 10.0% of samples taken for a particular
parameter, that stream segment is Impaired for that parameter.
The fecal coliform bacteria parameter is exception to the rule.
See the Fecal Coliform Bacteria section in the Ambient Data
portion below.
Each biological parameter (benthic and fish community)
and each ambient parameter is assigned a Use Support
Category based on its rating or percent exceedance. A
detailed description of each category can be found on the first
page of Appendix 5-A. Each monitored stream segment is
given an overall category number which reflects the highest
individual parameter category. Figure 5-18 shows how the
category number is translated into the use support rating.
Example
Stream A had a benthic sample that rated Good-Fair and
12% of turbidity samples taken at the ambient station were exceeding the standard. The benthic
sample would be given an individual category number of 1 (Figure 5-17) and the turbidity parameter
would be given a category number of 5 since >10% of samples exceeded the standard. Therefore,
stream A’s overall category number would be a 5, indicating the stream has a use support rating of
Impaired.
FiguRe 5-17: use suPPoRt
CategoRies FoR BioLogiCaL Ratings
Biological
Ratings
Aquatic Life
Use Support
Excellent/Natural
Supporting
(Categories 1-2)
Good
Good-Fair/Moderate
Not Impaired
Not Rated Not Rated
(Category 3)
Fair Impaired(Categories 4-5)Poor/Severe
FiguRe 5-18: CategoRY numBeR to
use suPPoRt Rating
CategoRY #use suPPoRt Rating
1 Supporting2
3 Not Rated
4 Impaired5
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5.10
recoMMendationS & action pLanS at the SubbaSin ScaLe
dwQ priority SuMMary
Table 5-1 is a list of waters in the Middle Roanoke River Subbasin that DWQ has prioritized for restoration/
protection. The order of priority is not based solely on the severity of the steam’s impairment or impacts but
rather by the need for particular actions to be taken. A stream that is currently supporting its designated uses
may be prioritized higher within this table than a stream that is currently impaired. This is based on a more
holistic evaluation of the drainage area which includes monitoring results, current and needed restoration/
protection efforts, land use and other activities that could potentially impact water quality in the area. Some
supporting streams may have a more urgent need for protections than an impaired stream with restoration
needs already being implemented.
The table also lists potential stressors and sources that may be impacting a stream including in-field
observations, monitoring data, historical evidence and permit or other violations. Additional study may be
needed to determine exact source(s) of the impact. The last column includes a list of recommended actions.
taBLe 5-1: notaBLe wateRs in tHe LoweR Roanoke RiveR suBBasin (not Ranked)
stReam name au#CLass.PotentiaL
stRessoR(s)
PotentiaL
souRCe(s)
QuaLitative
status
aCtions
needed
Roanoke R 23-(26)b3 C Low DO --Impaired SS
Quankey Cr 23-30b C ----Impaired M
Hardison Mill Cr 23-50-3 C ----Supporting SS
Cashie R 24-2-(1)a, b, (9), (11) & (15)C;SW Low pH --Supporting --
Class.: Classification (e.g., C, B, WS-I, WS-II, WS-III, WS-IV, WS-V, Tr, HQW, ORW, SW, UWL)
Stressor: Chemical parameters or physical conditions that at certain levels prevent waterbodies from meeting the standards for their designated
use (e.g., low/high DO, nutrients, toxicity, habitat degradation, etc.). Fecal Coliform Bacteria (FCB),
Source: The cause of the stressor. (Volume & Velocity: when a stream receives stormwater runoff at a much higher volume and velocity than it would naturally receive due to ditching, impervious surfaces, etc.)
Status: Impaired, Impacted, Supporting, Improving (For current Use Support Assessment see the Integrated Report.)
Actions Needed: Agriculture BMPs (Ag), Best Management Practices (BMPs), Daylight Stream (DS), Education (E), Forestry BMPs (F), Local Ordinance (LO), Monitoring (M), Nutrient Mgnt Controls (NMC), Protection (P), Restoration (R), Riparian Buffer Restoration (RBR), Stormwater
Controls (SC), Sediment and Erosion Control BMPs (SEC BMPs), Species Protection Plan (SPP), Stressor Study (SS), .
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5.11
StatuS & recoMMendationS For Monitored waterS
underStandinG thiS Section
In this Section, more detailed information about stream health, special studies, aquatic life stressors
and sources and other additional information is provided by each 10-digit Hydrological Unit Code
(HUC). Waterbodies discussed in this Chapter include all monitored streams, whether monitored
by DWQ or local agencies with approved methods. Use Support information on all monitored
streams within this watershed can be seen on the map in Figure 5-1, and a Use Support list of all
monitored waters in this basin can be found in the Use Support Chapter.
Use Support & Monitoring Box:
Each waterbody discussed in the Status & Recommendations for
Monitored Waters within this Watershed section has a corresponding
Use Support and Monitoring Box (Table 5-2). The top row indicates
the 2010 Use Support and the length of that stream or stream
segment. The next two rows indicate the overall Integrated Report
category which further defines the Use Support for both the 2008
and the 2010 reports. These first three rows are consistent for all
boxes in this Plan. The rows following are based on what type of
monitoring stations are found on that stream or stream segment
and may include benthic, fish community and/or ambient monitoring
data. If one of these three types of monitoring sites is not shown,
then that stream is not sampled for that type of data. The first column
indicates the type of sampling in bold (e.g., Benthos) with the site
ID below in parenthesis (e.g., CB79). The latest monitoring result/rating of that site is listed in the
next column followed by the year that sample was taken. If there is more than one benthic site, for
example, on that stream, the second site ID and site rating will be listed below the first. The last
row in the sample box in Table 5-2 is the AMS data. The data window for all AMS sites listed in the
boxes in this Plan is between 2004-2008. Only parameters exceeding the given standard are listed
in the second column with the percent of exceedance listed beside each parameter.
Please note any fecal coliform bacteria (FCB) listing in the last row (as seen in Table 5-2) only
indicates elevated levels and a study of five samples in 30 days (5-in-30) must be conducted
before a stream becomes Impaired for FCB.
taBLe 5-2: examPLe oF a use
suPPoRt and monitoRing Box
use suPPoRt: iMpaired (14 mi)
2008 IR Cat.4a
2010 IR Cat.4
Benthos (CB79)
(CB80)
Fair (2002)
Fair (2002)
Fish Com
(CF33)Good-Fair (2002)
AMS
(C1750000)
Turbidity - 12%
FCB - 48%
roanoke river within 03010107
AU#’s: 23-(26)a, 23-(26)b1 & 23-(26)b2
These three segments are approximately 103.8 miles combined. They begin
50 feet downstream of the Roanoke Rapids dam and run to the Highway 17
bridge in Williamston. The drainage area is mostly agricultural with some forest
and urban areas. There are four major and eight minor NPDES permitted
facilities as well as several permitted aquaculture and animal operations. The
three segments were on the Impaired Waters List from 2000 to 2008 for fish
consumption due to mercury as well as dioxin fish consumption advisor for
the lower segment 23-(53). Aquatic life and recreation assessments for the
segments were Supporting during that time.
Water Quality Status
During this sampling cycle, three AMS stations were monitored along these three segments. There were no
exceedances during this time and results showed similar water quality as found during the previous cycle. The
segments are therefore Supporting of aquatic life and recreational parameters.
use suPPoRt: SupportinG (103.8 mi)
2008 IR Cat.5
2010 IR Cat.2
AMS
(N8200000) (N8300000)
(N8550000)No Exceedances
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5.12
The Town of Weldon’s WWTP discharges effluent about 30 miles upstream of AMS station N8200000. Between
2004 and 2010, this facility has had several permit violations. Majority of these violations were for exceeding
the BOD weekly average limits and resulted in enforcement cases. The facility had eight FCB violations
several times greater than permit limits which also resulted in enforcement cases. By July 2009, the facility
had solved the issue and no longer received violations for elevated BOD or FCB.
These segments were delisted in 2010 from the Impaired Waters List due to the development of a Statewide
Mercury TMDL. The fish consumption advisory for this area is no longer in place, and the river will no longer
be listed due to this advisory.
AU#: 23-(26)b3
This segment is approximately 18 miles long from the Town of Halifax to the
southeast corner of the Town of Jamesville. The drainage area has a mixture
of forest and agricultural lands. As seen in Figure 5-19, majority of the forested
land is located in the flood plain of the river. This segment of the river has been
on the Impaired Waters List for low DO since 2008.
Water Quality Status
During the previous planning cycle, US Geological Survey
(USGS) conducted a study entitled “Relations Among Floodplain
Water Levels, Instream Dissolved-Oxygen (DO) Conditions, and
Streamflow in the Lower Roanoke River, NC, 1997-2001”. Data
from this study indicated that from September 1999 through
August 2004, 16.3% of the samples taken were below the
continuous monitoring DO standard for the daily average of 5
mg/l. Therefore, this segment of the Roanoke River was placed
on the Impaired Waters List in 2008 for low DO.
Data from the same station located on the eastern edge of the
Town of Jamesville, showed an increase in DO levels between
2006 and 2010. During that time only 3.78% of samples were
below the daily average of 5 mg/l. This slight increase can
be seen in Figure 5-20 which displays the daily DO averages
between 1998 to 2011.
It was reported in the last plan that the McMurray Fabrics Inc.
facility had significant noncompliance for their Whole Effluent
Toxicity (WET) testing. In 2005, the facility passed two tests
and failed two test. By the end of 2005, the facility ceased
discharging to the Roanoke River.
The Town of Williamston WWTP (NC0020044) was also reported on in the previous plan. The facility had
chronic problems exceeding their discharge limits for fecal coliform bacteria (FCB) and total suspended solids
(TSS). A Special Order of Consent (SOC) was issued in February 2006 allowing the facility to monitor FCB
levels without being penalized for exceeding the FCB limit assigned in their permit until December 2007. This
provided time for the facility to make the necessary upgrades to reduce risk of further violations. All upgrades
were completed within the period of the SOC and previous FCB permit limits once again applied. The facility
has had no FCB or TSS violations since that time.
use suPPoRt: iMpaired (17.8 mi)
2008 IR Cat.5
2010 IR Cat.5
FiguRe 5-19: 2010 sateLLite image oF
HuC 0301010706
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5.13
FiguRe 5-20: daiLY aveRage do data taken at usgs gage station
02081094 (1998-2011)
AU#: 23-(53)
This is the last segment (18.3 miles) of the Roanoke River before it empties into
Swan Bay of the Albemarle Sound. This drainage area is mostly agriculture with
some forested area in the floodplain and urban areas in and around the Town of
Plymouth. There is one major and two minor NPDES permitted facilities along
this segment of the Roanoke River. This segment has been on the Impaired
Waters List since 2000 for fish consumption-dioxins.
Water Quality Status
During this sampling cycle, this segment was monitored at two AMS stations. There were no exceedances
during this time and results showed similar water quality as found during the previous cycle. The segments
are there for Supporting of aquatic life and recreational parameters.
This segment was also listed in 2002 for fish consumption-mercury. The mercury portion of the Impairment
was removed in 2010 due to development of a Statewide Mercury TMDL. However, it remains on the Impaired
Waters List for the fish consumption-dioxin Impairment. Dioxins are a by-product in some manufacturing
processes, herbicide productions and used for bleaching paper. There is no current indication of the specific
source of dioxins in this segment. The fish consumption advisory for catfish and carp along this segment was
issued by the NC Department of Health and Human Resources.
Quankey creek-roanoke river (0301010701)
Includes: Roanoke River [AU#: 23-(26)a], Quankey Creek [AU#:
23-30b] & Chockoyotte Creek [AU#: 23-29]
This watershed contains a mix land use of urban, agriculture, residential and some
forested areas. There are three major and two minor NPDES permitted facilities
along with one permitted swine animal operations located within the watershed.
There is only one stream segment (Quankey Creek) within this watershed on the
2010 Impaired Waters List.
use suPPoRt: iMpaired
(18.3 mi)
2008 IR Cat.5
2010 IR Cat.4t
AMS
(N9250000)
(N9600000)No Exceedances
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5.14
Quankey Creek [AU#: 23-30b]
This segment of Quankey Creek is approximately 3.4 miles from the confluence
of Little Quankey Creek [AU#: 23-30-1] to the Roanoke River [AU#: 23-(26)a].
The majority of the drainage area is agricultural lands with some residential
and commercial land cover. The Town of Halifax runs along a portion of this
segment. The Halifax WWTP holds a Minor NPDES permit to discharge to the
creek. The creek was placed on the Impaired Water List in 1998 for Biological
Integrity/Benthos.
Water Quality Status
A fish community sample was taken at this site for the first time and resulted in a Good rating. The habitat
scored high due to high quality instream and riparian buffer habitat. pH levels were below the state standard
of 6.0; however, the upstream watershed is swamp-like where low pH values are to be expected. The types
of fish collected show some signs of nutrient enrichment.
Recommendations
It is recommended that the benthic station NB60 be sampled during the next monitoring cycle to determine if
benthic conditions have improved.
conoconnara SwaMp-roanoke river (0301010702)
Includes: Roanoke River [AU#: 23-(26)a], Conoconnara Swamp
[AU#: 23-33], & Wheeler Creek [AU#: 23-32]
This watershed contains a mix land use of agriculture, residential, wetlands, forested
and some urban areas. There is one minor NPDES permitted facility along with
five swine and one cattle permitted animal operations located within the watershed.
There are no waters on the 2010 Impaired Waters List within this watershed.
kehukee SwaMp-roanoke river (0301010703)
Includes: Roanoke River [AU#: 23-(26)a & b1], Kehukee Swamp
[AU#: 23-42], & Sandy Run [AU#: 23-37]
This watershed contains a mix land use of agriculture, residential, wetlands and
forested areas. There are four minor NPDES permitted facilities along with seven
swine, one poultry and one cattle permitted animal operations located within the
watershed. There are no waters on the 2010 Impaired Waters List within this
watershed.
Sweetwater creek (0301010704)
Includes: Sweetwater Creek [AU#: 23-50], Hardison Mill Creek
[AU#: 23-50-3], & Peter Swamp [AU#: 23-50-4]
This watershed contains agriculture with some residential and forested areas. There
is one minor NPDES permitted facility along with eight aquaculture permits located
within the watershed. There are no waters on the 2010 Impaired Waters List within
this watershed.
use suPPoRt: iMpaired (3.4 mi)
2008 IR Cat.5
2010 IR Cat.5
Benthos (NB60)Fair (1999)
Fish Com
(NF46)Good (2009)
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5.15
Hardison Mill Creek [AU#: 23-50-3]
Hardison Mill Creek is approximately 20 miles from source to Sweetwater Creek
[AU#: 23-50]. Land cover for the majority of this drainage area is agriculture.
This creek is currently supporting all designated uses.
Water Quality Status
This creek was monitored at Yarrell Creek Road (SR 1528) for the third time
since 1999 and has been rated Moderate for all three samples. However, during the 2009 sample there
was a noticeable decline in benthic health and population. There was a total absence of the flow-dependent
blackflies that have been abundant or common in all previous collections. There was also a drastic decrease
in the diversity of chironomid larvae. These declines may be due to the drastically higher specific conductivity
in 2009 (179 µS/cm) versus levels measured in 2004 (58 µS/cm) as well as the decline in pH (4.3). The
absence of the blackflies also suggests the stream is experiencing low flow conditions.
conoho creek-roanoke river (0301010705)
Includes: Roanoke River [AU#: 23-(26)b2], Conoho Creek [AU#:
23-49a & b], & Coniott Creek [AU#: 23-48]
This watershed contains agriculture and wetlands with some residential, urban and
forested areas. There two major and one minor NPDES permitted facilities along
with seven swine permitted animal operations and nine aquaculture permits located
within the watershed. There are no waters on the 2010 Impaired Waters List within
this watershed.
Gardener creek-roanoke river (0301010706)
Includes: Roanoke River [AU#: 23-(26)b3 & (53)], Devils Gut [AU#:
23-52], & Gardners Creek [AU#: 23-52-1]
This watershed contains agriculture and wetlands with some residential, urban and
forested areas. There two minor NPDES permitted facilities along with 21 aquaculture
permits located within the watershed. The two segments of the Roanoke River in this
watershed are on the 2010 Impaired Waters List and are discussed at the beginning
of this section.
headwaterS caShie river (0301010707)
Includes: Cashie River [AU#: 24-2-(1)a & (1)b], Connaritsa Swamp
[AU#: 24-2-3], & Wahtom Swamp [AU#: 24-2-2]
This watershed contains a mix land use of agriculture, residential, wetlands and
forested areas. There are two minor NPDES permitted facilities along with three
permitted swine animal operations located within the watershed. There are no waters
on the 2010 Impaired Waters List within this watershed.
use suPPoRt: SupportinG
(19.9 mi)
2008 IR Cat.2
2010 IR Cat.2
Benthos
(NB69)Moderate (2009)
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5.16
Cashie River [AU#: 24-2-(1)a & (1)b]
These two segments of Cashie River are approximately 45 miles from source
to just upstream of the Bertie County line. However about 15 miles of the
second segment is located in the Outlet Cashie River Watershed (0301010708).
The majority of the drainage area is agriculture with some residential areas
and a small amount of urban area downstream. There is one minor NPDES
permitted facility and three permitted swine operations discharging to the river.
The Cashie River was placed on the 2002 Impaired Waters List due to a NC
DHHS fish advisory-mercury; however, the advisory was lifted and the river
was removed from the list in 2010. The river is currently supporting all uses.
Water Quality Status
Cashie River was monitored at two benthic stations within this watershed. Location of these stations can be
seen in Figure 5-1. Both sites had decent habitat ratings, long term decreasing pH levels, increasing specific
conductivity and signs of possible upstream point or nonpoint source pollution inputs. The downstream site
(NB76) dropped a rating from Natural to Moderate due to the lower number and pollution tolerance level of the
taxa collected.
An AMS station was also monitored during this sampling cycle and is located at the upstream benthic station
(NB75). Parameters monitored at the station were consistent with those results from the previous cycle with
the exception of pH levels. Long term monitoring results (1998-2009) showed a slight decrease from the mid
6’s to roughly 5.7.
Since 2002, the Cashie River has been on the Impaired Waters List due to a fish consumption advisory. This
advisory was put in place by NC DHHS as a result of a 2003 study of mercury in fish tissue. This advisory has
been lifted causing the river to be removed from the list. A Statewide Mercury TMDL is also in development
stages to address this issue. Need to make this more consistent with text above in Roanoke River write up.
Recommendations
A source study is recommended to determine the source of increasing conductivity levels and decreasing pH
levels.
outLet caShie river (0301010708)
Includes: Cashie River [AU#: 24-2-(1)b, (9), (11) & (15)], Roquist
Creek [AU#: 24-2-7], & Hoggard Mill Creek [AU#: 24-2-6]
This watershed contains a mix land use of agriculture, residential, wetlands and
forested areas. There are one minor and one major NPDES permitted facilities along
with five permitted aquaculture operations located within the watershed. There are
no waters on the 2010 Impaired Waters List within this watershed.
Cashie River [AU#: 24-2-(9), (11) & (15)]
These three segments of the Cashie River are approximately nine miles from
just downstream of the Bertie County line to the Albemarle Sound (Batchelor
Bay) [AU#: 24]. The majority of the drainage area is agriculture and forested
area.
Water Quality Status
Since 2002, the Cashie River has been on the Impaired Waters List due to a fish consumption advisory. This
advisory was put in place by NC DHHS as a result of a 2003 study of mercury in fish tissue. This advisory has
been lifted causing the River to be removed from the list. A Statewide Mercury TMDL is also in development
stages to address this issue.
use suPPoRt: SupportinG
(45.3 mi)
2008 IR Cat.5
2010 IR Cat.2
Benthos
(NB75)
(NB76)
Moderate (2009)
Moderate (2009)
AMS (N8950000)No Exceedances
use suPPoRt: no data (9.3 mi)
2008 IR Cat.5
2010 IR Cat.3c
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These three segments have moved from the Impaired category to No Data because there are not current
monitoring stations along this stretch of river.
pLyMouth-roanoke river (0301010709)
Includes: Welch Creek [AU#: 23-55], Roanoke River [AU#: 23-(53)],
& Conaby Creek [AU#: 23-56]
This watershed contains a mix land use of agriculture, urban, residential, and wetland
areas. There are two minor and one major NPDES permitted facilities along with two
permitted aquaculture operations located within the watershed. Two streams (Welch
Creek and the downstream most segment of the Roanoke River) are on the 2010
Impaired Waters List within this watershed.
Welch Creek [AU#: 23-55]
Welch Creek is approximately 13 miles from source to the Roanoke River [AU#:
23-(53)]. The majority of the drainage area is agriculture with some industrial
and a small percentage of urban area. Welch Creek is currently Impaired for
dioxin due to a fish consumption advisory.
Water Quality Status
Welch Creek was not monitored during this cycle.
reFerenceS
References marked with (*) indicates a DWQ special study report. These reports are not currently available
online. Contact the DWQ Environmental Science Section at (919) 743-8400 to receive a hardcopy.
North Carolina Department of Environment and Natural Resources (NCDENR). Division of Water Quality
(DWQ). August 2004a. Classifications and Water Quality Standards Applicable to Surface Waters and
Wetlands of North Carolina. North Carolina Administrative Code: 15A NCA 2B. Raleigh, NC. (http://
h2o.enr.state.nc.us/csu/)
____. DWQ. Planning Section. Basinwide Planning Unit (BPU). November 2008. Supplemental Guide to
Basinwide Planning: A support document for basinwide water quality plans. Raleigh, NC. (http://por-
tal.ncdenr.org/web/wq/ps/bpu/about/supplementalguide)
____. DWQ. Environmental Sciences Section (ESS). Ecosystems Unit. September 2010. Roanoke River
Basin Ambient Monitoring Systems Report (January 1, 2005 through December 31, 2009). Raleigh,
NC. (http://portal.ncdenr.org/c/document_library/get_file?uuid=c9a59811-634c-490b-b566-
6a8ebc00554d&groupId=38364)
____. DWQ. Environmental Sciences Section (ESS). Biological Assessment Unit (BAU). December 2010.
Basinwide Assessment Report: Roanoke River Basin. Raleigh, NC. (http://portal.ncdenr.org/c/doc-
ument_library/get_file?uuid=e3dd1d8b-bbc5-42c9-9999-1d99dd4c7455&groupId=38364)
____. *DWQ. ESS. BAU. Month Year. (B-#) Report Name & Sample Date. Raleigh, NC.
Pate, Travis. 2009. Watershed Assessment in North Carolina: Building a Watershed Database with Popula-
tion, Land Cover, and Impervious Cover Information. Master Theses, University of North Carolina at
Chapel Hill.
USGS Water-Resources Investigations Report 03-4295: “Relations Among Floodplain Water Levels, In-
stream DO Conditions, and Streamflow in the Lower Roanoke River, NC, 1997-2001”
use suPPoRt: iMpaired
(13.3 mi)
2008 IR Cat.5
2010 IR Cat.5
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5-A.1
dRaFt 2010
iR CategoRY
integRated RePoRting CategoRies FoR individuaL assessment unit/use suPPoRt CategoRY/
PaRameteR assessments. a singLe au Can Have muLtiPLe assessments dePending on data
avaiLaBLe and CLassiFied uses.
1 All designated uses are monitored and supporting
1b Designated use was impaired, other management strategy in place and no standards violations for the
parameter of interest (POI)
1nc DWQ have made field determination that parameter in exceedance is due to natural conditions
1r Assessed as supporting watershed is in restoration effort status
1t No criteria exceeded but approved TMDL for parameter of interest
2 Some designated uses are monitored and supporting none are impaired Overall only
2b Designated use was impaired other management strategy in place and no standards violations Overall
only
2r Assessed as supporting watershed is in restoration effort status overall only
2t No criteria exceeded but approved TMDL for POI Overall only
3a Instream/monitoring data are inconclusive (DI)
3b No Data available for assessment
3c No data or information to make assessment
3n1 Chlorophyll a exceeds TL value and SAC is met-draft
3n2 Chlorophyll a exceeds EL value and SAC is not met first priority for further monitoring-draft
3n3 Chlorophyll a exceeds threshold value and SAC is not met first second priority for further monitoring-draft
3n4 Chlorophyll a not available determine need to collect-draft
3t No Data available for assessment –AU is in a watershed with an approved TMDL
4b Designated use impaired other management strategy expected to address impairment
4c Designated use impaired by something other than pollutant
4cr Recreation use impaired no instream monitoring data or screening criteria exceeded
4cs Shellfish harvesting impaired no instream monitoring data- no longer used
4ct Designated use impaired but water is subject to approved TMDL or under TMDL development
4s Impaired Aquatic Life with approved TMDL for Aquatic Life POI or category 5 listing
4t Designated use impaired approved TMDL
5 Designated use impaired because of biological or ambient water quality standards violations and needing
a TMDL
5r Assessed as impaired watershed is in restoration effort status
appendix 5-a
use suPPoRt Ratings FoR aLL
monitoRed wateRs in tHe
LoweR Roanoke RiveR suBBasin
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5-A.2
AU_NameAU_Number AU_Description LengthArea AU_Units Classification
All 13,123 Waters in NC are in Category 5-303(d) List for Mercury due to statewide fish consumption advice for several fish species
NC 2010 Integrated Report
Quankey Creek-Roanoke River 0301010701Roanoke River Basin Watershed
Roanoke River 03010107Roanoke River Basin Subbasin
Quankey Creek-Roanoke River 0301010701Roanoke River Basin Watershed
Chockoyotte Creek23-29 From source to Roanoke River 10.6 FW Miles C
1
3a
Little Quankey Creek23-30-1 From source to Quankey Creek 9.5 FW Miles C
1
Quankey Creek23-30a From source to Little Quankey Creek 16.0 FW Miles C
1
Quankey Creek23-30b From Little Quankey Creek to Roanoke River 3.4 FW Miles C
5
ROANOKE RIVER23-(25.5)From a point 0.6 mile upstream of N.C.
Hwy. 48 bridge to a line across river 50 feet
downstream of N.C. Hwy. 48 (City of
Roanoke Rapids, Town of Weldon water
supply intakes)
1.7 FW Miles WS-IV;CA
1
1
1
ROANOKE RIVER23-(26)a From a line across the river 50 ft
downstream of NC Hwy 48 bridge to the
confluence of Sandy Run Cr at the Bertie
Northampton Halifax Co. line
50.1 FW Miles C
1
1
Conoconnara Swamp-Roanoke River 0301010702Roanoke River Basin Watershed
Conoconnara Swamp23-33 From source to Roanoke River 17.7 FW Miles C
1
Kehukee Swamp-Roanoke River 0301010703Roanoke River Basin Watershed
Kehukee Swamp
(White Millpond)
23-42 From source to Roanoke River 10.6 FW Miles C
1
10/20/2010 Page 233 of 372NC 2010 Integrated Report 5-303(d) List EPA Approved Aug 31, 2010
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5-A.3
AU_NameAU_Number AU_Description LengthArea AU_Units Classification
All 13,123 Waters in NC are in Category 5-303(d) List for Mercury due to statewide fish consumption advice for several fish species
NC 2010 Integrated Report
Kehukee Swamp-Roanoke River 0301010703Roanoke River Basin Watershed
ROANOKE RIVER23-(26)b1 From the confluence of Sandy Run Cr at the
Bertie/Northampton/Halifax Co. line to
subbasin 8/9 boundary
24.8 FW Miles C
1
1
Sweetwater Creek 0301010704Roanoke River Basin Watershed
Hardison Mill Creek23-50-3 From source to Sweetwater Creek 19.9 FW Miles C
1
Conoho Creek-Roanoke River 0301010705Roanoke River Basin Watershed
Conoho Creek23-49a From source to Martin Co 1417 below
Beaverdam Cr
24.5 FW Miles C
1
Conoho Creek23-49b From Martin Co 1417 to Roanoke River 7.0 FW Miles C
1
ROANOKE RIVER23-(26)b2 From subbasin 8/9 boundary to Hwy 17
Bridge in Williamston
28.9 FW Miles C
1
1
ROANOKE RIVER23-(26)b3 From Hwy 17 bridge at Williamston to the
18 mile marker at Jamesville
17.8 FW Miles C
5
Headwaters Cashie River 0301010707Roanoke River Basin Watershed
Cashie River24-2-(1)a From source to Bertie County SR 1225 15.2 FW Miles C;Sw
1
1
1
Outlet Cashie River 0301010708Roanoke River Basin Watershed
Cashie River24-2-(1)b From Bertie County SR 1225 to a point 1
mile upstream from Bertie Co. SR 1500
30.1 FW Miles C;Sw
1
Hoggard Mill Creek24-2-6 From source to Cashie River 7.4 FW Miles C;Sw
1
Roquist Creek24-2-7 From source to Cashie River 26.3 FW Miles C;Sw
1
Plymouth-Roanoke River 0301010709Roanoke River Basin Watershed
10/20/2010 Page 234 of 372NC 2010 Integrated Report 5-303(d) List EPA Approved Aug 31, 2010
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5-A.4
AU_NameAU_Number AU_Description LengthArea AU_Units Classification
All 13,123 Waters in NC are in Category 5-303(d) List for Mercury due to statewide fish consumption advice for several fish species
NC 2010 Integrated Report
Plymouth-Roanoke River 0301010709Roanoke River Basin Watershed
ROANOKE RIVER23-(53)From 18 mile marker at Jamesville to
Albemarle Sound (Batchelor Bay)
18.3 FW Miles C;Sw
4t
1
1
Welch Creek23-55 From source to Roanoke River 13.3 FW Miles C;Sw
4t
1
5
10/20/2010 Page 235 of 372NC 2010 Integrated Report 5-303(d) List EPA Approved Aug 31, 2010
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5-B.1
appendix 5-b
BioLogiCaL samPLing site data sHeets
(BentHiC maCRoinveRteBRate & FisH CommunitY)
FoR tHe LoweR Roanoke RiveR suBBasin
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5-B.2
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5-B.3
Biological Samples Taken During this Assessment Cycle
station id wateRBodY CountY site LoCation samPLe ResuLts
Benthic Sample Sites
NB55 KEHUKEE SWP HALIFAX SR 1804 09 - Natural
NB59 QUANKEY CR HALIFAX NC 903 09 - Natural
NB67 CONOHO CR MARTIN SR 1417 09 - Natural
NB69 HARDISON MILL CR MARTIN SR 1528 09 - Moderate
NB75 CASHIE R BERTIE SR 1219 09 - Moderate
NB76 CASHIE R BERTIE SR 1257 09 - Moderate
NB78 HOGGARD MILL CR BERTIE SR 1301 09 - Moderate
NB80 ROQUIST SWP BERTIE US 17 09 - Natural
NB93 CONOHO CR MARTIN NC 11-42 09 - Moderate
Fish Community Sample Sites
NF46 Quankey Cr Halifax US 301/NC 903/NC
125
09 - Good
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5-B.4
Water Quality Parameters
Temperature (°C)6.6
Dissolved Oxygen (mg/L)10.6
Specific Conductance (µS/cm)74
pH (s.u.)5.4
Channel Modification (5)15
Instream Habitat (20)18
Site Photograph
Water Clarity Tannic
Habitat Assessment Scores (max)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
None --- ---
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)90 0 0 10 (NC 903)
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C 33.6 113 5 0.5
AU Number Level IV Ecoregion
HALIFAX 8 03010107 36.353333 -77.643889 23-30a Rolling Coastal Plain
County Subbasin 8 digit HUC Latitude Longitude
Waterbody Location Station ID Date Bioclassification
QUANKEY CR NC 903 NB59 02/03/09 Natural
Instream Habitat (20)18
Bottom Substrate (15)15
Pool Variety (10)10
Riffle Habitat (16)0
Bank Erosion (7)6
Bank Vegetation (7)7
Light Penetration (10)9
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)90
Taxonomic Analysis
Pollution tolerant taxa present in 1999 but absent from 2004 and 2009 include the oligochaete Limnodrilus spp., the gastropod Physa spp ., the beetle
Tropisternus spp ., and the chironomids Dicrotendipes neomodestus, and D. nervosus . Conversely, many pollution intolerant taxa were present in 2004
and 2009 but absent in 1999 and included the mayfly Ephemerella doris, the caddisfly Ceraclea transversa and Polycentropus spp . Most notably, the
1999 sample lacked nine stonefly taxa collected from the subsequent samples that included Allocapnia spp ., Suwallia basalis, Leuctra spp., Shipsa
rotunda , Perlesta spp ., Perlinella drymo, Clioperla clio, Isoperla namata , and I. transmarina .
Data Analysis
The 2009 sample continues the trend of improving benthic macroinvertebrate community metrics from the first sample here in 1999. The S, EPTS, BI and
EPTBI have all improved in 2004 and 2009 from the initial assessment. Although specific conductance has been fairly stable here with the 1999 sample
resulting in a measurement of 70 µS/cm, 61 µS/cm in 2004, and 74 µS/cm in 2009, the benthic macroinvertebrate data suggest improving physical
conditions at this site since 1999.
Natural02/16/99 7823 40 9 6.66 5.93
Natural02/23/04 9351 52 17 5.81 4.05
Bioclassification
02/03/09 10528 51 15 5.80 4.77 Natural
Sample Date Sample ID ST EPT BI EPT BI
Substrate Gravel, sand, silt, and detritus.
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5-B.5
Water Quality Parameters
Temperature (°C)6.6
Dissolved Oxygen (mg/L)8.8
Specific Conductance (µS/cm)93
pH (s.u.)5.4
Channel Modification (5)15
Bioclassification
KEHUKEE SWP SR 1804 NB55 02/03/09 Natural
Waterbody Location Station ID Date
AU Number Level IV Ecoregion
HALIFAX 8 03010107 36.129167 -77.363333 23-42 Southeastern Floodplains and Low Terraces
County Subbasin 8 digit HUC Latitude Longitude
C 19.2 44 6 0.6
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 0 0 0
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
None --- ---
Site Photograph
Water Clarity Clear
Habitat Assessment Scores (max)
Channel Modification (5)15
Instream Habitat (20)18
Bottom Substrate (15)6
Pool Variety (10)10
Riffle Habitat (16)0
Bank Erosion (7)7
Bank Vegetation (7)7
Light Penetration (10)9
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)82 Substrate Sand, silt, and detritus,
Bioclassification
02/03/09 10598 66 12 6.79 6.06 Natural
Sample Date Sample ID ST EPT BI EPT BI
Moderate02/24/04 9343 46 7 7.08 5.89
Taxonomic Analysis
The 2009 sampled produced the highest EPT taxa richness and the lowest BI since sampling commenced here in 1999. EPT taxa present in 2009 but
absent previously included the intolerant caddisflies Triaenodes ignitus , Ptilostomis spp., and Chimarra spp. Additionally, several tolerant taxa that were
either abundant or common in previous collections were absent or rare in 2009 including the molluscs Physa spp ., Micromenetus dilatatus , and
Sphaerium spp .
Data Analysis
The 2009 collection established the highest EPT, ST and the lowest BI since sampling first started here in 1999 and resulted in a subsequent
improvement in the bioclassification to Natural. Although the specific conductance was somewhat higher in 2009 (92 µS/cm) relative to 2004 (78 µS/cm)
and 1999 (74 µS/cm), the evidence based on the shift from a facultative benthic macroinvertebrate community to a slightly more pollution intolerant
community suggest an overall improvement in conditions at this site from previous samples. This improvement may be related to a decrease in non-point
pollution as a result of the drought.
Moderate02/11/99 7811 59 8 7.11 6.64
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5-B.6
Water Quality Parameters
Temperature (°C)3.9
Dissolved Oxygen (mg/L)11.6
Specific Conductance (µS/cm)143
pH (s.u.)5.2
Channel Modification (5)15
Waterbody Location Station ID Date Bioclassification
CONOHO CR NC 11-42 NB93 02/03/09 Moderate
County Subbasin 8 digit HUC Latitude Longitude AU Number Level IV Ecoregion
Martin 9 03010107 35.971667 -77.295278 23-49a Mid-Atlantic Flatwoods
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C 38.5 42 6 0.6
---
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 ---------
Water Clarity clear/tannic
Habitat Assessment Scores (max)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
none ---
Site Photograph
Channel Modification (5)15
Instream Habitat (20)15
Bottom Substrate (15)5
Pool Variety (10)9
Riffle Habitat (16)0
Bank Erosion (7)10
Bank Vegetation (7)10
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)84 Substrate Mostly silt with detrital pools, some sand.
Sample ID ST EPT BI EPT BI
7.10
Bioclassification
02/03/09 10599 29 3 7.20 6.78 Moderate
Sample Date
Taxonomic Analysis
Only the second time sampled, there was a 25% reduction in EPT taxa richness from 4 species obtained in 2004 to 3 species in 2009. The winter stonefly
Taeniopteryx and the silt-loving mayfly Caenis were absent in 2009 while the caddisfly Polycentropus was collected for the first time. Additionally, fewer
tolerant crustaceans, oligochaetes, and midges were also collected in 2009 leading to a decrease in the overall benthic biotic index.
Data Analysis
Located just northeast of Oak City, this headwater segment of Conoho Creek is mostly forested in the immediate vicinity of the sampling site although the
catchment is overwhelmingly dominated by agricultural farms. A total absence of NPDES permitted dischargers indicates the high specific conductance
measured is a result of nonpoint source runoff. Despite the presence of good macroinvertebrate habitat and decent flows, Conoho Creek received a
Moderate bioclassification, driven in part by the paucity of EPT taxa. However, this Moderate rating is on the cusp of a Natural rating, as it was in 2004,
leading to the conclusion that the water quality in this stream has not changed since that time.
Moderate02/25/04 9345 31 4 7.70
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5-B.7
Water Quality Parameters
Temperature (°C)4.5
Dissolved Oxygen (mg/L)10.7
Specific Conductance (µS/cm)177
pH (s.u.)5.3
Channel Modification (5)15
Instream Habitat (20)16
Waterbody Location Station ID Date Bioclassification
CONOHO CR SR 1417 NB67 02/04/09 Natural
County Subbasin 8 digit HUC Latitude Longitude AU Number Level IV Ecoregion
Martin 9 03010107 35.885556 -77.124444 23-49b Mid-Atlantic Flatwoods
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C 98.2 12 8 0.6
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 ---------
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
none ------
Site Photograph
Water Clarity clear/tannic
Habitat Assessment Scores (max)
Instream Habitat (20)16
Bottom Substrate (15)5
Pool Variety (10)9
Riffle Habitat (16)0
Bank Erosion (7)10
Bank Vegetation (7)10
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)85
ST EPT BI EPT BI
Substrate Detritus with silt, some sand
Bioclassification
02/04/09 10600 32 6 6.43 5.23 Natural
Sample Date Sample ID
4.80 Natural
02/24/04 9344 38 6 6.80 5.40
Taxonomic Analysis
This sampling site maintained it's EPT richness of 6 taxa from the previous sampling event. Two species of mayflies collected in 2004, Caenis and
Eurylophella doris were absent in 2009 as was the caddisfly Platycentropus. Ironoquia punctatissima , a caddisfly often found in swamp-like conditions,
was collected for the first time in 10 years. Additionally, total taxa richness decreased from 2004 levels reflected in fewer tolerant midges, oligohaetes and
crustacea collected. Although still higher than that measured in 1999, the biotic index was lower than in 2004 due in part to the more intolerant EPT
community observed.
Data Analysis
This sampling site is low in the watershed of Conoho Creek and is very large. Much like the upstream site, agriculture dominates the landuse of Conoho
Creek's watershed. Non-point source pollutants are likely diluted by the time they reach this segment and thereby have less impact on the
macroinvertebrate community. Although this site did receive a Natural rating compared to the upstream rating (Moderate), the upstream site very nearly
obtained a Natural rating suggesting water quality differences between these two sites are not so great. The macroinvertebrate community here appears
to be relatively stable.
Natural
02/24/99 7834 39 5 6.27
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5-B.8
Water Quality Parameters
Temperature (°C)5.8
Dissolved Oxygen (mg/L)8.0
Specific Conductance (µS/cm)179
pH (s.u.)4.3
Channel Modification (5)11
Instream Habitat (20)15
Bottom Substrate (15)5
Pool Variety (10)6
Bioclassification
HARDISON MILL CR SR 1528 NB69 02/04/09 Moderate
Waterbody Location Station ID Date
AU Number Level IV Ecoregion
MARTIN 9 03010107 35.764722 -77.006111 23-50-3 Mid-Atlantic Flatwoods
County Subbasin 8 digit HUC Latitude Longitude
C 49.7 18 11 0.7
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 0 0 0
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
None --- ---
Site Photograph
Water Clarity Clear
Habitat Assessment Scores (max)
Pool Variety (10)6
Riffle Habitat (16)0
Bank Erosion (7)7
Bank Vegetation (7)7
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)71 Substrate Detritus and silt.
7.54 5.20
Bioclassification
02/04/09 10601 15 1 7.61 6.40 Moderate
Sample Date Sample ID ST EPT BI EPT BI
Taxonomic Analysis
The 2009 sample produced a drastic decline in chironomid taxa relative to previous collections. Given the increase in specific conductance, it would have
been expected that the diversity of the generally pollution tolerant chironomids would have increased or at least maintained levels previously recorded
from this station. It is unclear as to why this reduction was observed in 2009 but it might be related to the very low pH (4.3) which was lower than previous
collections (4.6 in 2004, 5.5 in 1999). However, the most significant change in this community was the total absence of the flow-dependent blackflies
Simulium spp. and Stegopterna spp . which were both abundant or common from all previous collections. Their absence in 2009 strongly suggests that
poor flows have been persistent at this location and may have had a role in the lowered ST and higher BI although the extremely low pH likely
exacerbated this condition.
Data Analysis
Although the ST and EPT metrics reached all time lows for 2009, the BI, although higher, was generally comparable to previous collections. Moreover,
the EPTBI in 2009 was intermediate between the two previous records. The primary difference in the benthic macroinvertebrate community observed at
this location in 2009 relative to previous assessments was the drastic decrease in the diversity of chironomid larvae. Indeed, only two chironomid taxa
were collected in 2009 versus 20 in 2004 and seven in 1999. The absence of the flow-dependent blackflies suggest that there have been persistent low
flow conditions at this site. Indeed, flow conditions were marginal at the time of sampling. This likely explains, at least in part, the increased BI and
lowered ST. However, specific conductance at this site was drastically higher in 2009 (179.1 µS/cm) versus levels measured in 2004 (58 µS/cm) and
1999 (65µS/cm). Consequently, deleterious anthropogenic influence at this station cannot be ruled out. In addition to the low flows and elevated
conductivity, the very low pH likely played a role in the decline in the invertebrate community. Indeed, benthic macroinvertebrate communities are known
to degrade with very low pH .
Moderate
02/12/99 7817 27 3 7.32 7.67 Moderate
02/24/04 9331 36 2
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5-B.9
Water Quality Parameters
Temperature (°C)2.2
Dissolved Oxygen (mg/L)9.1
Specific Conductance (µS/cm)190
pH (s.u.)4.7
Channel Modification (15)15
Instream Habitat (20)16
Bottom Substrate (15)4
Site Photograph
Water Clarity clear
Habitat Assessment Scores (max)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
Lewiston-Woodville WWTP (~2.5 miles upstream)NC0023116 0.15
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 0 0
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C;Sw 35.4 45 6 0.6
County Subbasin 8 digit HUC Latitude Longitude AU Number Level IV Ecoregion
BERTIE 10 03010107 36.123611 -77.121667 24-2-(1)a Mid-Atlantic Flatwoods
Waterbody Location Station ID Date Bioclassification
CASHIE R SR 1219 NB75 02/05/09 Moderate
Bottom Substrate (15)4
Pool Variety (10)9
Left Bank Stability (10)10
Right Bank Stability (10)10
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)84
Taxonomic Analysis
A mostly tolerant benthic community was observed at this sampling location in 2009. No stoneflies or mayflies were collected at this monitoring station.
Caddisflies present in the sample included Ironoquia punctatissima and Ptilostomis spp. These are common somewhat tolerant caddisflies found in
North Carolina swamp benthic communities. Chironomid taxa richness was also low (8) with only two taxa that were common and abundant including
Orthocladius obumbratus and the recently described Tvetenia sp. NC (Epler 2001) respectively.
Data Analysis
A Moderate bioclassication was retained at this site in 2009. Total taxa richness (26) and EPT taxa richness (2) dropped slightly compared to 2004. The
NCBI was elevated from the 2004 sample. Despite the Moderate bioclassification, water quality parameters suggests some degradation. Conductivity
was twice as high (190 µS/cm) and acidic conditions (pH=4.7) were observed in 2009 compared to 1999 (82 µS/cm, pH=6.2). Physico-chemical data was
not collected at this site in 2004. The elevated conductivity suggest the possibility of upstream point source pollution inputs from the Lewiston-Woodeville
WWTP. Additionally, naturally acidic waters occur in North Carolina swamp ecosystems and can lead to reductions in benthic taxa richness. A small
beaverdam was observed within the sampling area in 2004 and 2009 and low flow conditions with nearly homogenous detrital substrate were noted in
2009 compared to other Roanoke Basinwide swamp sites. This lack of flow and lack of mixed substrate could lead to the absence of some mayflies and
stoneflies adapted to those conditions.
Not Rated
07/14/83 3057 34 2 8.55 7.00 Not Rated
06/26/84 3242 41 2 8.20 7.00
Moderate
02/11/99 7812 41 6 7.51 7.24 Natural
02/23/04 9328 29 3 7.49 7.03
Bioclassification
02/05/09 10602 26 2 8.15 7.10 Moderate
Sample Date Sample ID ST EPT BI EPT BI
Substrate Detritus and fine particulate organic matter was dominant.
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5-B.10
Water Quality Parameters
Temperature (°C)4.4
Dissolved Oxygen (mg/L)9.5
Specific Conductance (µS/cm)133
pH (s.u.)5.1
Channel Modification (15)15
Instream Habitat (20)17
Site Photograph
Water Clarity clear
Habitat Assessment Scores (max)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
Lewiston-Woodville WWTP (>4 miles upstream)NC0023116 0.15
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)100 0 0
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C;Sw 108.6 10 8 0.7
County Subbasin 8 digit HUC Latitude Longitude AU Number Level IV Ecoregion
BERTIE 10 03010107 36.047778 -76.985556 24-2-(1)b Mid-Atlantic Floodplains and Low Terraces
Waterbody Location Station ID Date Bioclassification
CASHIE R SR 1257 NB76 02/09/09 Moderate
Instream Habitat (20)17
Bottom Substrate (15)5
Pool Variety (10)9
Left Bank Stability (10)10
Right Bank Stability (10)10
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)86
Taxonomic Analysis
EPT taxa collected at this station were similar to that upstream including the caddisflies Ironoquia punctatissima and Ptilostomis spp . Additionally, the
winter stonefly Taeniopteryx spp. was collected in abundance at this monitoring station. A low chironomid taxa richness (11) was present at this location
similar to upstream, however, intolerant chironomid taxa were present in the sample including Eukiefferiella devonica gr. and Lopescladius spp . Rarely
collected chironomid taxa in the sample included Parakiefferiella sp. D and Tvetenia sp. NC . The swamp endemic megalopteran Chauliodes rasticornis
was found rare at the site.
Data Analysis
Total taxa richness remained similar to samples in the past, however, EPT taxa richness dropped from seven taxa in 1999 and 2004 to only three in 2009.
This drop in EPT richness in addition to the highest NCBI and EPTBI recorded from this site lowered the bioclassification from Natural in 2004 to
Moderate in 2009. Habitat parameters in 2009 (86) were higher than that observed in 2004 (70), yet similar to that observed in 1999 (85) suggesting no
reduction in the bioclassification due to physical parameters. More acidic conditions were found in 2009 (pH=5.1) compared to 2004 (pH=5.6) and 1999
(pH=6.4) which could lead to the recent depletion of EPT taxa. Additionally, conductivity was elevated in 2009 (133 µS/cm) compared to in 2004 (64
µS/cm) and 1999 (72 µS/cm) similar to the upstream site at SR 1219 suggesting inputs from an upstream discharger or another unknown source.
Natural
02/15/99 7827 34 7 6.80 6.09 Natural
02/24/04 9330 35 7 6.59 4.90
Bioclassification
02/09/09 10603 34 3 7.40 6.59 Moderate
Sample Date Sample ID ST EPT BI EPT BI
Substrate Fine particulate organic matter and detritus was dominant.
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5-B.11
Water Quality Parameters
Temperature (°C)3.4
Dissolved Oxygen (mg/L)10.2
Specific Conductance (µS/cm)89
pH (s.u.)5.1
Channel Modification (5)12
Instream Habitat (20)16
Bottom Substrate (15)6
Site Photograph
Water Clarity Tannic
Habitat Assessment Scores (max)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
None --- ---
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)90 0 10 0
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
C; Sw 48.2 5 4 0.5
AU Number Level IV Ecoregion
BERTIE 10 03010107 36.025000 -76.951389 24-2-6 Mid-Atlantic Floodplains and Low Terraces
County Subbasin 8 digit HUC Latitude Longitude
Waterbody Location Station ID Date Bioclassification
HOGGARD MILL CR SR 1301 NB78 02/05/09 Moderate
Bottom Substrate (15)6
Pool Variety (10)9
Riffle Habitat (16)0
Bank Erosion (7)7
Bank Vegetation (7)7
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)77
Taxonomic Analysis
The 2009 sample continues the trend observed here since the 1999 collection in that there has been a decline in intolerant taxa and an increase in
tolerant taxa. For 2009, this trend in reduced presence (or total absence) of intolerant taxa is exemplified by the lack of the stonefly Amphinemura spp., a
substantial decrease in the abundance of the stonefly Taeniopteryx spp. (abundant in 1999 and 2004, rare in 2009), the absence of the caddisfly
Platycentropus spp, and the first time appearance of the the tolerant beetle Coptotomus spp ., the hemipteran Pelocoris spp., as well as the tolerant
chironomids Cricotopus annulator and Cricotopus bicinctus.
Data Analysis
As can be seen from the BI (and to a lesser extent the EPTBI data), as well as the ST and (to a lesser extent) the EPTS, the benthic macroinvertebrate
community metrics continue to decline at this site since its first assessment in 1999. The data show a continuing shift from pollution intolerant taxa to
more pollution tolerant taxa. It is possible that the prolonged drought may have resulted in very low flow conditions at this site for much of the year before
the February sample and that may have caused natural stress due to lowered dissolved oxygen levels. Although dissolved oxygen data is extremely
variable, it does not support this conclusion as the dissolved oxygen levels in 2009 (10.2 mg/l) was higher than in either 2004 (8.9 mg/l) or 1999 (8.6
mg/l). Conversely, the much higher specific conductance at this location (89.4 µS/cm) in 2009 relative to levels measured from previous observations in
2004 (60 µS/cm) and 1999 (70 µS/cm) may suggest a possible anthropogenic component to the increasing biotic indicies observed at this location since
1999.
Moderate
02/15/99 7826 46 7 6.81 6.38 Natural
02/23/04 9327 30 3 7.18 5.65
Bioclassification
02/05/09 10604 24 3 7.40 7.57 Moderate
Sample Date Sample ID ST EPT BI EPT BI
Substrate Sand, silt, and detritus.
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5-B.12
Water Quality Parameters
Temperature (°C)0.8
Dissolved Oxygen (mg/L)8.8
Specific Conductance (µS/cm)83
pH (s.u.)5.0
Channel Modification (5)13
Bioclassification
ROQUIST SWP US 17 NB80 02/06/09 Natural
Waterbody Location Station ID Date
AU Number Level IV Ecoregion
BERTIE 10 03010107 35.941667 -76.962222 24-2-7 Mid-Atlantic Floodplains and Low Terraces
County Subbasin 8 digit HUC Latitude Longitude
C; Sw 45.7 10 6 0.6
Stream Classification Drainage Area (mi2)Elevation (ft)Stream Width (m)Stream Depth (m)
Forested/Wetland Urban Agriculture Other (describe)
Visible Landuse (%)90 0 0 10 (US 13/17)
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)NPDES Number Volume (MGD)
None --- ---
Site Photograph
Water Clarity Clear
Habitat Assessment Scores (max)
Channel Modification (5)13
Instream Habitat (20)16
Bottom Substrate (15)6
Pool Variety (10)9
Riffle Habitat (16)0
Bank Erosion (7)7
Bank Vegetation (7)7
Light Penetration (10)10
Left Riparian Score (5)5
Right Riparian Score (5)5
Total Habitat Score (100)78 Substrate Sand, silt, and detritus.
7.14 6.46
Bioclassification
02/06/09 10605 30 3 6.73 2.28 Natural
Sample Date Sample ID ST EPT BI EPT BI
Taxonomic Analysis
The 2009 collection produced the first record at this location for the facultative caddisfly Ptilostomis spp . and the intolerant caddisfly Lepidostoma spp . In
addition, the previous two collections included the collection of the pollution tolerant mayfly Caenis spp. but was absent in 2009. Other pollution tolerant
taxa collected from 1999 and 2004 but absent from 2009 sample included the chironomids Kiefferulus spp , Procladius spp, as well as the gastropods
Micromenetus dilatatus and Ferrissia spp.
Data Analysis
Although the ST and EPT have been relatively stable at this site since sampling commenced in 1999 the EPTBI and BI both dropped in 2009 with the
EPTBI dropping substantially. The decline in both the EPTBI and BI were due to the presence of several intolerant taxa collected for the first time in 2009
and the lack of several pollutant tolerant taxa absent from the 2009 collection but present in the previous samples. The shift in the benthic
macroinvertebrate community represented by these taxa from 2009 relative to the 2004 and 1999 collections may reflect the drought and the reduced
presence of non-point runoff at this site.
Natural
02/11/99 7813 31 4 6.99 5.50 Natural
02/24/04 9329 38 4
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5-B.13
Water Quality Parameters
Temperature (°C)
Dissolved Oxygen (mg/L)
Specific Conductance (µS/cm)
pH (s.u.)
Water Clarity
Channel Modification (5)
Instream Habitat (20)
Bottom Substrate (15)
Pool Variety (10)
Riffle Habitat (16)
Erosion (7)
Bank Vegetation (7)
Light Penetration (10)
Left Riparian Score (5)
Right Riparian Score (5)
Total Habitat Score (100)
HALIFAX
Bioclassification
Level IV Ecoregion
Rolling Coastal Plain
Longitude
06/18/09
Date Station ID
NF46
Subbasin
Site Photograph
Good
---
6
Average Depth (m)
AU Number
0
Agriculture
---
Upstream NPDES Dischargers (>1MGD or <1MGD and within 1 mile)
8
Latitude
36.318589
No
Reference SiteStream Width (m)
-77.594832 23-30b
0.4
This is the first fish community sample collected at this site. Watershed -- drains east-central Halifax County including the southern portion of the Town of
Halifax; tributary to the Roanoke River; site is ~ 2 miles upstream of the creek's confluence with the river. Habitat -- upstream from the bridge Coastal
Plain-like, downstream from the bridge Piedmont-like gorge with very high quality instream and riparian habitats -- riffles, runs, pools, Podostemum, and
bluffs along both banks. Water Quality -- dissolved oxygen saturation only 62%; pH less than 6 s.u., but upstream watershed is swamp-like where low pH
values are to be expected. 2009 -- a very diverse fish community with Coastal Plain and Piedmont species present, but only one species of sucker, one
intolerant species, and only two species of darters; some evidence of nutrient enrichment based upon the high percentage of omnivores+herbivores
collected such as Eastern Silvery Minnow, Bluehead Chub, and Spottail Shiner.
Residential
5
Volume (MGD)
Data Analysis
Visible Landuse (%)
Species Change Since Last Cycle N/A
06/18/09
NPDES Number
95
Elevation (ft)
65
Drainage Area (mi2)
33.6
Forested/Wetland
Bioclassification
Good
NCIBISample Date
Other (describe)
None
Habitat Assessment Scores (max)
22.0
12
0
5
5
10
15
Sample ID
2009-66
7
7
7
5.4
120
5.6
Clear, tannin stained
5
19
Eastern Silvery Minnow (16%),
Redbreast Sunfish (15%), Bluehead
Chub (14%)
Most Abundant Species 2009
92 Gravel, cobble, boulder, clay, siltSubstrate
Exotic Species 2009
Species Total
24 50
Bluegill
FISH COMMUNITY SAMPLE
Stream Classification
C
US 301/NC 903/NC 125
Location
8 digit HUC
03010107
Waterbody
QUANKEY CR
County
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5-B.14
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5-C.1
appendix 5-c
amBient monitoRing sYstems
station data sHeets
FoR tHe LoweR Roanoke RiveR suBBasin
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5-C.2
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N7300000
Location:ROANOKE RIV AT NC 48 AT ROANOKE RAPIDS
Stream class:WS-IV CA
NC stream index:23-(25.5)
Hydrologic Unit Code:03010107
Latitude:36.48151 Longitude:-77.64526
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)<4 4.8 5.2 6.6 9.1 11.3 12.6 15.643000
<5 4.8 5.2 6.6 9.1 11.3 12.6 15.643204.7
pH (SU)<6 6 6.3 6.6 6.9 7.2 7.7 847000
>9 6 6.3 6.6 6.9 7.2 7.7 847000
Salinity (ppt)N/A 0 0 0 0 0.1 0.1 0.190
Spec. conductance (umhos/cm at 25°C)N/A 90 97 102 109 113 119 139480
Water Temperature (°C)>32 4.2 6.8 9.4 17.1 24.8 27.3 29.848000
Other
TSS (mg/L)N/A 2.5 2.5 5 6.2 7 12 121911
Turbidity (NTU)>50 1.3 1.6 2.2 3.5 5.5 11.2 2248000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.02 0.02 0.044839
NO2 + NO3 as N >10 0.02 0.02 0.04 0.09 0.18 0.23 0.2948040
TKN as N N/A 0.2 0.23 0.25 0.28 0.32 0.36 0.44472
Total Phosphorus N/A 0.02 0.02 0.02 0.02 0.03 0.07 0.19488
Metals (ug/L)
Aluminum, total (Al)N/A 50 50 78 120 230 1000 100091
Arsenic, total (As)>10 5 5 5 5 5 5 59080
Cadmium, total (Cd)>2 1 1 2 2 2 2 29090
Chromium, total (Cr)>50 10 10 25 25 25 25 259090
Copper, total (Cu)>7 2 2 2 2 2 3 39070
Iron, total (Fe)>1000 57 57 105 200 355 1200 120091011.1
Lead, total (Pb)>25 10 10 10 10 10 10 109090
Manganese, total (Mn)>200 38 38 40 57 76 190 1909000
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>25 10 10 10 10 10 10 109090
Zinc, total (Zn)>50 10 10 10 10 10 18 189080
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
48 7.4 0 0
01/27/2005Time period:11/23/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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5-C.3
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N8200000
Location:ROANOKE RIV AT US 258 NR SCOTLAND NECK
Stream class:C
NC stream index:23-(26)
Hydrologic Unit Code:03010107
Latitude:36.20925 Longitude:-77.38387
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)<4 5.9 6 6.6 8.5 10.6 12.2 14.843000
<5 5.9 6 6.6 8.5 10.6 12.2 14.843000
pH (SU)<6 5.9 6.4 6.6 7 7.3 7.5 7.647102.1
>9 5.9 6.4 6.6 7 7.3 7.5 7.647000
Salinity (ppt)N/A 0 0 0 0 0.1 0.1 0.190
Spec. conductance (umhos/cm at 25°C)N/A 95 100 110 118 128 133 143480
Water Temperature (°C)>32 4.8 7.2 9.7 17.7 25.2 27.8 29.748000
Other
TSS (mg/L)N/A 6 7.8 11 12 15 21 47191
Turbidity (NTU)>50 3.6 6.3 7.6 9.9 13.8 22.1 3348000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.02 0.02 0.034833
NO2 + NO3 as N N/A 0.02 0.08 0.1 0.14 0.21 0.28 0.36471
TKN as N N/A 0.2 0.23 0.27 0.3 0.34 0.36 0.5461
Total Phosphorus N/A 0.03 0.03 0.03 0.04 0.05 0.06 0.08470
Metals (ug/L)
Aluminum, total (Al)N/A 150 150 380 430 540 1200 120090
Arsenic, total (As)>10 5 5 5 5 5 5 59090
Cadmium, total (Cd)>2 1 1 2 2 2 2 29090
Chromium, total (Cr)>50 10 10 25 25 25 25 259090
Copper, total (Cu)>7 2 2 2 2 3 4 49040
Iron, total (Fe)>1000 390 390 515 610 750 1500 150091011.1
Lead, total (Pb)>25 10 10 10 10 10 10 109090
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>88 10 10 10 10 10 10 109090
Zinc, total (Zn)>50 10 10 10 10 10 10 109090
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
48 35.6 0 0
01/27/2005Time period:11/23/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N8300000
Location:ROANOKE RIV AT NC 11 NR LEWISTON
Stream class:C
NC stream index:23-(26)
Hydrologic Unit Code:03010107
Latitude:36.01400 Longitude:-77.21487
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)<4 6.1 6.6 6.8 8.4 10.4 12.6 15.229000
<5 6.1 6.6 6.8 8.4 10.4 12.6 15.229000
pH (SU)<6 6.4 6.8 7 7.4 7.6 7.9 8.229000
>9 6.4 6.8 7 7.4 7.6 7.9 8.229000
Salinity (ppt)N/A 0.03 0.04 0.04 0.05 0.05 0.06 0.07290
Spec. conductance (umhos/cm at 25°C)N/A 93 100 102 112 122 130 146290
Water Temperature (°C)>32 4.4 7.6 10.1 17.8 25.7 28.7 30.129000
Other
TSS (mg/L)N/A 12 12 13 17 29 60.4 68110
Turbidity (NTU)>50 7.1 9.4 11.5 15 19 24 4829000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.02 0.03 0.042921
NO2 + NO3 as N N/A 0.02 0.11 0.17 0.22 0.29 0.31 0.44281
TKN as N N/A 0.2 0.23 0.28 0.31 0.36 0.4 0.44281
Total Phosphorus N/A 0.04 0.05 0.05 0.07 0.08 0.1 0.27290
Metals (ug/L)
Aluminum, total (Al)N/A 190 190 400 550 775 1700 170090
Arsenic, total (As)>10 5 5 5 5 5 5 59090
Cadmium, total (Cd)>2 1 1 2 2 2 2 29090
Chromium, total (Cr)>50 10 10 25 25 25 25 259090
Copper, total (Cu)>7 2 2 2 2 3 3 39040
Iron, total (Fe)>1000 610 610 715 850 1150 2600 260093033.3
Lead, total (Pb)>25 10 10 10 10 10 10 109090
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>88 10 10 10 10 10 10 109090
Zinc, total (Zn)>50 10 10 10 10 14 22 229060
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
29 38.9 0 0
01/19/2005Time period:10/17/2007to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N8550000
Location:ROANOKE RIV AT US 13 AND US 17 AT WILLIAMSTON
Stream class:C
NC stream index:23-(26)
Hydrologic Unit Code:03010107
Latitude:35.85986 Longitude:-77.04009
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)<4 5.4 6.2 6.7 7.8 10 11.1 13.159000
<5 5.4 6.2 6.7 7.8 10 11.1 13.159000
pH (SU)<6 5.8 6.7 6.8 7.1 7.4 7.6 859101.7
>9 5.8 6.7 6.8 7.1 7.4 7.6 859000
Salinity (ppt)N/A 0.03 0.04 0.04 0.05 0.05 0.06 0.06590
Spec. conductance (umhos/cm at 25°C)N/A 92 100 104 117 126 132 138590
Water Temperature (°C)>32 4.2 7.7 10.5 17.7 26 28.3 30.259000
Other
TSS (mg/L)N/A 6.2 6.4 10.1 14.5 21.8 38 39202
Turbidity (NTU)>50 6.2 9.4 12 15 19 26.8 4161000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.02 0.04 0.055836
NO2 + NO3 as N N/A 0.08 0.15 0.17 0.21 0.26 0.29 0.34580
TKN as N N/A 0.2 0.25 0.29 0.33 0.38 0.46 0.63572
Total Phosphorus N/A 0.04 0.05 0.05 0.06 0.07 0.09 0.1590
Metals (ug/L)
Aluminum, total (Al)N/A 200 200 395 650 850 1700 170090
Arsenic, total (As)>10 5 5 5 5 5 5 59090
Cadmium, total (Cd)>2 1 1 2 2 2 2 29090
Chromium, total (Cr)>50 10 10 25 25 25 25 259090
Copper, total (Cu)>7 2 2 2 2 2 3 39050
Iron, total (Fe)>1000 540 540 670 1000 1300 2000 200093033.3
Lead, total (Pb)>25 10 10 10 10 10 10 109090
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>88 10 10 10 10 10 10 109090
Zinc, total (Zn)>50 10 10 10 10 11 14 149070
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
60 30.7 1 1.7
01/19/2005Time period:12/03/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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5-C.6
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N8950000
Location:CASHIE RIV AT SR 1219 NR LEWISTON
Stream class:C Sw
NC stream index:24-2-(1)
Hydrologic Unit Code:03010107
Latitude:36.12376 Longitude:-77.12140
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)N/A 0.2 0.7 1.3 3.7 6.8 9.9 12.6520
pH (SU)<4.3 3.9 4.8 5.5 5.9 6.2 6.5 7.852203.8
>9 3.9 4.8 5.5 5.9 6.2 6.5 7.852000
Salinity (ppt)N/A 0.01 0.02 0.03 0.04 0.05 0.08 0.25520
Spec. conductance (umhos/cm at 25°C)N/A 54 68 78 100 116 177 493520
Water Temperature (°C)>32 0.1 4.6 8.3 14.8 21.8 24.8 27.352000
Other
TSS (mg/L)N/A 2.5 2.9 5.6 9.2 18 35.4 39187
Turbidity (NTU)>50 1.8 2.9 5.3 10.1 31.5 50 9552407.7
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.03 0.12 0.245133
NO2 + NO3 as N N/A 0.02 0.02 0.02 0.02 0.03 0.1 0.435242
TKN as N N/A 0.35 0.51 0.62 0.91 1.4 1.82 2.4470
Total Phosphorus N/A 0.03 0.05 0.08 0.2 0.43 0.59 1.5520
Metals (ug/L)
Aluminum, total (Al)N/A 93 93 180 220 270 310 31070
Arsenic, total (As)>10 5 5 5 5 5 5 57070
Cadmium, total (Cd)>2 1 1 2 2 2 2 27070
Chromium, total (Cr)>50 10 10 25 25 25 25 257070
Copper, total (Cu)>7 2 2 2 2 2 2 27060
Iron, total (Fe)>1000 560 560 760 1700 3400 8600 860074057.1
Lead, total (Pb)>25 10 10 10 10 10 10 107070
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.26060
Nickel, total (Ni)>88 10 10 10 10 10 10 107070
Zinc, total (Zn)>50 10 10 10 10 12 20 207050
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
52 64.8 4 7.7
01/19/2005Time period:12/03/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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5-C.7
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N9250000
Location:ROANOKE RIV 1.3 MI UPS WELCH CRK NR PLYMOUTH
Stream class:C Sw
NC stream index:23-(53)
Hydrologic Unit Code:03010107
Latitude:35.86767 Longitude:-76.78541
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)N/A 4.4 5.9 6.8 7.6 9.8 11.3 11.9590
pH (SU)<4.3 4.5 6.6 6.9 7.1 7.3 7.4 7.659000
>9 4.5 6.6 6.9 7.1 7.3 7.4 7.659000
Salinity (ppt)N/A 0.03 0.03 0.04 0.05 0.05 0.06 0.06590
Spec. conductance (umhos/cm at 25°C)N/A 80 94 106 116 125 134 140590
Water Temperature (°C)>32 5.1 6.9 10.2 18.6 25.8 29.1 31.559000
Other
Chlorophyll a (ug/L)>40 1 1 2 4 8 9 1955000
TSS (mg/L)N/A 3.5 5.8 6.2 8.4 10.8 12.9 14206
Turbidity (NTU)>50 2.8 5.8 7.1 9.3 12 18 3059000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.02 0.02 0.03 0.05 0.085935
NO2 + NO3 as N N/A 0.02 0.09 0.15 0.2 0.25 0.29 0.39590
TKN as N N/A 0.2 0.29 0.31 0.34 0.38 0.44 0.54581
Total Phosphorus N/A 0.02 0.04 0.05 0.05 0.06 0.07 0.12591
Metals (ug/L)
Aluminum, total (Al)N/A 170 181 332 425 512 673 680100
Arsenic, total (As)>10 5 5 5 5 5 5 5100100
Cadmium, total (Cd)>2 1 1.1 2 2 2 6.5 710191073.6
Chromium, total (Cr)>50 10 10 21 25 25 25 25100100
Copper, total (Cu)>7 2 2 2 2 2 3 310080
Iron, total (Fe)>1000 460 467 575 720 1025 1280 130010202093
Lead, total (Pb)>25 10 10 10 10 10 10 10100100
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>88 10 10 10 10 10 10 10100100
Zinc, total (Zn)>50 10 10 10 10 11 16 1610070
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
59 8.7 0 0
01/11/2005Time period:12/07/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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5-C.8
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Station #:N9600000
Location:ROANOKE RIV AT NC 45 AT SANS SOUCI
Stream class:C Sw
NC stream index:23-(53)
Hydrologic Unit Code:03010107
Latitude:35.91469 Longitude:-76.72252
Agency:NCAMBNT
PercentilesResults not meeting EL# results Min 10th 25th 50th 75th 90th Max
# ND EL # %%Conf
Field
D.O. (mg/L)N/A 4 5.6 6.1 7.4 9.6 11 12590
pH (SU)<4.3 6.3 6.6 6.9 7.1 7.2 7.4 7.659000
>9 6.3 6.6 6.9 7.1 7.2 7.4 7.659000
Salinity (ppt)N/A 0.04 0.04 0.05 0.06 0.08 0.1 0.4590
Spec. conductance (umhos/cm at 25°C)N/A 104 108 126 149 185 222 763590
Water Temperature (°C)>32 5.4 7.6 10.2 19 25.5 29.6 31.659000
Other
Chlorophyll a (ug/L)>40 1 1 2 3 6 10 1754020
TSS (mg/L)N/A 2.5 3.5 6 6.2 8 16 20199
Turbidity (NTU)>50 2 4.6 5.8 7.6 11 14 2559000
Nutrients (mg/L)
NH3 as N N/A 0.02 0.02 0.03 0.05 0.1 0.14 0.2597
NO2 + NO3 as N N/A 0.02 0.1 0.15 0.19 0.24 0.28 0.32590
TKN as N N/A 0.29 0.32 0.36 0.42 0.48 0.52 0.61570
Total Phosphorus N/A 0.02 0.05 0.05 0.06 0.07 0.08 0.12590
Metals (ug/L)
Aluminum, total (Al)N/A 61 61 210 270 415 850 85090
Arsenic, total (As)>10 5 5 5 5 5 5 59090
Cadmium, total (Cd)>2 1 1 2 2 2 2 29090
Chromium, total (Cr)>50 10 10 25 25 25 25 259090
Copper, total (Cu)>7 2 2 2 2 2 3 39070
Iron, total (Fe)>1000 120 120 505 810 955 1100 110091011.1
Lead, total (Pb)>25 10 10 10 10 10 10 109090
Mercury, total (Hg)>0.012 0.2 0.2 0.2 0.2 0.2 0.2 0.28080
Nickel, total (Ni)>88 10 10 10 10 10 10 109090
Zinc, total (Zn)>50 10 10 10 10 10 10 109090
Fecal Coliform Screening(#/100mL)
# results:Geomean:# > 400:% > 400:%Conf:
59 7 0 0
01/11/2005Time period:12/07/2009to
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non-detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
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5-D.1
appendix 5-d
10-digit wateRsHed maPs
FoR tHe LoweR Roanoke RiveR suBBasin
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5-D.2
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5-D.3WARREN
HubquarterCr
ROA038A
Roanoke
Rapids
Jackson RichSquare
ROAN O K E RIVER
ConoconnaraSw
ROANOKERIVER
QuankeyCr.
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N8200000
NB53
N7300000 NF46
NB91 NB59 NB60
NB59
Lake
Gaston
Roanoke
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Halifax
Weldon
NORTHAMPTON
HALIFAX
LittleQuan k e y C r.
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I-95
N
C-4
8
NC-46
NC-4
NC-903
US-3 01
US-158N
C
-1
86
NC-125
NC-305
NC-561
NC-4,561
U
S
-
1
5
8
,3
0
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US-301-BUS
I-95
NC-561
US-158
NC-9 0 3
US-301
N
C-5
6
1
N
C-5
6
1
Quankey
Creek-Roanoke
River
Watershed
(0301010701)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
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5-D.4
NORTHAMPTON
HERTFORD
Roanoke
Rapids
Aulander
Roxobel
Jackson
Rich
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Scottland
Neck
ROANOKERIVER
ConoconnaraSw
ROANOKERIVER
QuankeyCr.
KehukeeSw
C
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OcconeecheeCr.
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R
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HERTFORD
BERTIE
US-158
US-258
US-301
NC-561
N
C-481
NC-1
86
I-95
NC-305
NC-308
NC-46
NC-125,903
NC-35N
C-305,561
NC-125
NC-11-BUS
NC-903
NC-11,42
U
S-1
5
8,3
0
1
US-158,258
US-301-BUS
US-158
I-95
NC-561
NC-305
NC-305
US-301
NC-35
Conoconnara
Swamp-Roanoke
River
Watershed
(0301010702)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
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NORTHAMPTON
HERTFORD
Aulander
Roxobel
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Rich
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Lewiston
Woodville
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C y p r e s s S wamp
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US-258
NC-30 8
NC-11,42
NC-903
N
C-9
7
NC-561
NC-125
N C-1 2 5,9 0 3
N
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NC-305
US-301
N
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NC-122
NC-33
NC-11-BUS
NC-561
NC-305
Kehukee
Swamp-Roanoke
River
Watershed
(0301010703)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
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PITT MARTIN OakCity
Williamston
Jamiesville
R
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US-13,64 NC-125
NC-30
US-64-ALT
US-13,17
US-64-BUS
US-13,17,64
US-17-BUS
NC-125
US-13,17
US-13,64
Sweetwater
Creek
Watershed
(0301010704)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
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0
1
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5-D.7
PITTMARTIN
Roxobel
Windsor
Oak
City
Williamston
Jamiesville
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ROA0492A
RO A N O K E R I V E R
Kelford
Lewiston
Woodville
Hobgood
Cy p r e s s S w amp
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H
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NC-903
N C-308
US-13,64
NC-11,42
US-64-ALT
U S-1 3
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US-13,17
N
C-42
NC-125
N
C-11
NC-111
NC-142
NC-305
US-17
N C-125,903
NC-122
U S-1 3-B U S
US-13,17,64
NC-42,142
US-17-BUS
US-64
NC-142
US-13,17
US-1 7
NC-903
N
C-125
US-64
U S -1 3
NC-125
NC-308
US-13,64
Conoho
Creek-Roanoke
River
Watershed
(0301010705)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY #0 E k "Y
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Gage
Stations
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NC
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of
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Basinwide
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Unit
October
2011¯
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:
L
ow
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R R
oa
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iv
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as
i
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(
H
uC
0
3
0
1
0
1
0
3
)
a
PP
en
d
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Ces
5-D.8
Windsor
Williamston
Jamiesville
Plymouth
ROANOKERIVER
ConohoCreek
RoquistCr
Hardison
MillCr
CashieRiver
WelchCr
N9250000 N9600000N9685000
NB69
N8550000
NB67
NB80
NB78
N8300000
S w e e t water
Cr.
L
o
n
g
Creek
Smithwick
C
r.
ReadyBr.
DogBr.
M
A
R
T
I
N
B
E
A
U
F
O
R
T
R
O
A
N
O
KE
RIVE
R
Hamilton
ConiottCr.
BeaverdamCr.
ConineCr.
DevilsGut
LanierSw.
DeepRunSwamp
Cooper
Sw.
GardnersCr.
US-17
US-64
N
C-1
7
1
NC-32
US-13,17
NC
-308
NC-125
US-13,64
US-64-ALT
NC
-45
NC-32,45 NC-45,308
NC-149
US-64-BUS
US-13,17,64
NC-45,99
US-17-BUS
US-13,64
US-13,17
NC-32
N
C-125
NC-45
Gardener
Creek-Roanoke
River
Watershed
(0301010706)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY#0Ek"Y
USGS
Gage
Stations
!<
RAMS
(`09-`10)
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RAMS
(`07-`08)
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Stations
^
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Community
[¡
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¢¡
NC
Division
of
Water
Quality
Basinwide
Planning
Unit
October
2011 ¯
0
2
4
6
8
1
Miles
Roa
n
o
k
e
R
iv
e
R B
as
i
n
:
L
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R R
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R
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as
i
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(
H
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0
3
0
1
0
1
0
3
)
a
PP
en
d
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Ces
5-D.9
Roxobel
Windsor
Oak
City
Rich
Square
R O A N O K E R I V E R
C
a
s
h
i
e
R
iver
R o quistCr
Hoggard
Mill
C
r
CashieRiver
NB80
NB78
NB76
NB93
N8950000
NB75
N8300000
NB55
ROA0491A
ROA0492A
N8200000Bridge
r
s
C
r.
NORTHAMPTON
HERTFORD
BERTIE
R O A N O K E R I V E R
Kelford
Aulander
Lewiston
Woodville
Hobgood
C y p r e s s S w am p
BullNe c k S w.
S a n d y Run
Canal G u t
Hamilton
Askewville
Etheridge S w .
IndianCr.
Coniott C r.
M
ARTIN
BERTIE
H
A
LIF
A
X
Wahto m S w.
Connaritsa S w .
NC-308
U S -1 3
NC-305
NC-11,42
NC-42
NC-903
NC-561
N
C-1
1-B
U
S
US-17
US-258
N
C
-30
5,
5
61
U S -1 3 -B U S
NC-305
Headwaters
Cashie
River
Watershed
(0301010707)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY #0 E k "Y
USGS
Gage
Stations
!<
RAMS
(`09-`10)
¢¡
RAMS
(`07-`08)
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^
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¢¡
NC
Division
of
Water
Quality
Basinwide
Planning
Unit
October2011¯
0
2
4
6
8
1
Miles
Roa
n
o
k
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R
iv
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R B
as
i
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:
L
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R R
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n
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R
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(
H
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0
3
0
1
0
1
0
3
)
a
PP
en
d
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Ces
5-D.10
WA
SH
IN
GT
ON
Roxobel
Windsor
Williamston
Plymouth
ROANOKERIVER
C
a
s
h
i
e
River
ConohoCreek
RoquistCreek
CashieRiver
N9250000 N9600000N9685000
N8550000
NB67
NB80
NB78
NB76
N8950000
NB75
N8300000 NORTHAMPTONHERTFORD
BERTIE
Kelford
Aulander
LewistonWoodvilleCanalGut
Sweetwater
Cr.
ReadyBr.
DogBr.
R
O
AN
O
KE
RIVE
R
Hamilton
Askewville
IndianCr.
ConiottCr.
BeaverdamCr.
Conine
Cr.
DevilsGut
GardnersCr.
WahtomSw.
ConnaritsaSw.
H
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MillCr.ChucklemakerSw.
FlatSwampCr.
Wadin
g
P
l
a
c
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C
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S
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tton
Cr.
C
h
o
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w
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Cr.
US-17
NC-45
US-13
NC-3
08
NC-305
NC-32
US-13,17
NC-45,308
NC-11,42
US-13-BUS
US-17-BUS
N
C-3
0
8
NC-308
NC-45
US-13,17
Outlet
Cashie
River
Watershed
(0301010708)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY#0Ek"Y
USGS
Gage
Stations
!<
RAMS
(`09-`10)
¢¡
RAMS
(`07-`08)
¢¡
Lake
Stations
^
Benthos
"à)
Fish
Community
[¡
Ambient
¢¡
NC
Division
of
Water
Quality
Basinwide
Planning
Unit
October2011 ¯
0
2
4
6
8
1
Miles
Roa
n
o
k
e
R
iv
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R B
as
i
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:
L
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R R
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H
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0
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1
0
1
0
3
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a
PP
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d
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5-D.11
WA
S
HI
N
G
T
O
N
C
H
OWA
N
Windsor
Williamston
Jamiesville
Plymouth
R O A N O K E R I V E R
C
a
s
h
i
e
River
R o quistCreek
H
ardisonMillCr
CashieRiver
WelchCreek
N9250000
N9600000
N9685000
NB69
N8550000
NB67
NB80
NB78
NB76
Sweetwater
Cr.
L
o
n
gCreek
Smithwick
C
r.
R e a dy Br.
D o g B r.
M
A
R
T
I
N
B
E
A
U
F
O
R
T
R
O
A
N
O
KE
RIVER
ConineCr.
D e vilsGut
L a nierSw.
Deep R u n S w a m p
Cooper
Sw.
Gardn e r s C r.
H
oggard
Mill
Cr.
Wadin
g
P
l
a
c
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Cr.
S
u
tton
Cr.
C
h
o
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w
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Cr.
B
E
R
T
I
E
Albe
m
arle
Sound
Middle
Riv
e
r ConabyCr.
U
S-64
NC-308
N
C
-
1
7
1
NC-32
N C-4 5,99
N C -45
US-17
U
S-1
3,1
7
N C-45,308
NC-32,45
N C-3 2,9 4
U S-1 3
N C -1 4 9
U S-13-B U S
US-64-BUS
NC-45
NC-32
NC-32
NC-45
NC-308
N
C-3
0
8
US-13,17
Plymouth-Roanoke
River
Watershed
(0301010709)
Legend
Permits
Animal
Operation
Permits
Monitoring
Sites
2010
Use
Support
Minor
NPDES
Dischargers
Major
NPDES
Dischargers
NPDES
Non-Dischargers
NPDES
Stormwater
Individual
State
Cattle
Swine
Wet
Poultry
NPDES
Aquaculture
Supporting
Not
Rated
No
Data
Impaired
Primary
Roads
Municipalities
County
Boundaries
8-Digit
HUC
#*XY #0 E k "Y
USGS
Gage
Stations
!<
RAMS
(`09-`10)
¢¡
RAMS
(`07-`08)
¢¡
Lake
Stations
^
Benthos
"à)
Fish
Community
[¡
Ambient
¢¡
NC
Division
of
Water
Quality
Basinwide
Planning
Unit
October2011
¯
0
2
4
6
8
1
Miles
Roa
n
o
k
e
R
iv
e
R B
as
i
n
:
L
ow
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R R
oa
n
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R
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R suBB
as
i
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(
H
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0
3
0
1
0
1
0
3
)
a
PP
en
d
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Ces
5-D.12