CDIA_SCF_Basin_Monitoring_Report_20230926_final

Detention
Conditions
F)R
Baseline
Charlotte Douglas International Airport
Deicing Pad and South Crossfield Taxiway
(SCF) In -line Detention Basin
Charlotte, NC
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
Contents
1 Project Background......................................................................................
2 Methods........................................................................................................
2.1 Rainfall Monitoring..............................................................................
2.2 Monitoring Locations..........................................................................
2.2.1 Dimension Assessment.........................................................
2.2.2 Substrate Characterization....................................................
2.2.3 Bank Erosion Hazard Index(BEHI).......................................
2.2.4 North Carolina Stream Assessment Methodology (NCSAM)
2.2.5 Photographic Documentation ................................................
2.3 Quality Assurance/Quality Control .....................................................
3 Results..........................................................................................................
3.1 Rainfall Monitoring..............................................................................
3.2 Stream Monitoring..............................................................................
3.2.1 S25-2.....................................................................................
3.2.2 S25-3.....................................................................................
3.2.3 S25-4.....................................................................................
3.2.4 S32-1.....................................................................................
3.2.5 S32-2.....................................................................................
3.2.6 S34-1.....................................................................................
4 Discussion....................................................................................................
5 References...................................................................................................
Tables
Table 1. Summary of Pre -construction (2021) and Post -construction (2023) Stream Assessments
Appendices
Appendix A — Figures
Appendix B — Approved Monitoring Plan
Appendix C — Representative Photographs
Appendix D — Stream Cross Sections
Appendix E — Field Data Forms
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2023 SCF In -Line Detention Basin Baseline Conditions Report
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2023 SCF In -Line Detention Basin Baseline Conditions Report ���
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Project Background
The City of Charlotte's Aviation Department (Applicant) submitted a Phased Clean Water
Act (CWA) Section 404/401 Individual Permit (IP) on January 31, 2020, for the proposed
expansion of the Charlotte Douglas International Airport (CLT or Airport) in Mecklenburg
County, North Carolina. The CWA Section 401 Individual Water Quality Certification was
issued by the North Carolina Division of Water Resources (NCDWR) on August 21, 2020
and the CWA Section 404 IP was approved by the U.S. Army Corps of Engineers
(USACE) on December 15, 2020.
A component of the approved Phased IP includes stormwater detention basins located
in -line with existing channels. The purpose of the South Crossfield Taxiway (SCF) in -line
detention basin is to provide peak discharge reduction for storm events up to the 100-
year event in order to reduce peak flows downstream. During the design storm event,
three streams (Coffey Creek [S25] and two unnamed tributaries to Coffey Creek [S32
and S34]) would overtop their banks and flood the detention area (i.e., the streams'
floodplain), with attenuation within 48 hours.
An in -line detention basin associated with the Deicing Pad and SCF Project and a
permanent, culverted stream crossing were constructed on Coffey Creek (S25) from
2021 to 2023 (Appendix A, Figure 1). A 10-foot vegetated buffer was maintained along
all streams within the work area; however, a portion of the right bank of S25 was found to
have been disturbed in Fall 2022. The buffer was immediately stabilized and after
notification to the USACE and NCDWR and on -site consultation with NCDWR, the
riparian buffer was replanted in January 2023.
Operation of the in -line detention basin will result in the inundation and flooding of
streamside areas to all three streams. During the Phased IP Public Notice period, the
USACE and the NCDWR requested a Monitoring Plan of those channels subject to in -
line detention flooding. The Monitoring Plan requires documentation of pre- and post -
construction detention basin conditions, as well as five years of periodic monitoring
beginning six months after the post -construction survey (Appendix B). The post -
construction survey documents conditions of the streams compared to the pre -
construction survey to evaluate any changes that may have occurred during the
construction process, either naturally or as a result of anthropogenic effects. The data
collected from the post -construction survey is representative of conditions that
subsequent routine monitoring events will be compared to, taking into account normal
stream dynamics and fluctuation.
The pre -construction survey was completed and shared with the USACE and NCDWR in
spring 2021. This report summarizes the findings of the baseline, post -construction
conditions of Coffey Creek and its related tributaries.
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2023 SCF In -Line Detention Basin Baseline Conditions Report
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2 Methods
2.1 Rainfall Monitoring
Rainfall in the vicinity of the SCF Project was evaluated during the period of construction.
Discharges reaching bankfull elevation are known as channel -forming flows; therefore,
precipitation resulting in streams meeting or exceeding bankfull elevations are capable of
causing natural changes to the stream channels within the detention basin. Rainfall was
monitored at CRN-04 Raingage at Fire Station 30, Charlotte, NC — 351132080562345
(USGS 2023), which is the nearest rain gage to the SCF Project at a distance of just over
a quarter of a mile. No rain gages are installed directly on Coffey Creek.
2.2 Monitoring Locations
Monitoring locations were selected in consultation with NCDWR prior to pre -construction
baseline monitoring. A total of seven monitoring locations were established at riffle
features: four along Coffey Creek (S25-1, S25-2, S25-3, and S25-4) and three along
tributaries to Coffey Creek (S32-1, S32-2, and S34-1) (Appendix A, Figure 2). In
accordance with the Monitoring Plan, location S25-1 (downstream of the detention area)
is monitored only following annual or quarterly post -storm routine monitoring, to begin six
months following the post -construction survey. Therefore, no results for S25-1 are
presented in this report.
Monitoring locations within the detention basin (S25-2, S25-3, S25-4, S32-1, S32-2, and
S34-1) are subject to dimension, substrate, Bank Erosion Hazard Index (BEHI), and
North Carolina Stream Assessment Methodology (NCSAM) assessments, as well as
photographic documentation.
2.2.1 Dimension Assessment
Cross -sectional dimension data was collected for monitoring locations S25-2, S25-3,
S25-4, S32-1, S32-2, and S34-1 applying standard surveying techniques using a basic
surveyor's level (CST Berger), rod, and a tape strung from bank to bank. Cross sections
were surveyed assuming height of instrument as elevation zero, typically at the left "bank
pin" (i.e., rebar), and differential leveling. Elevations were recorded at important features
such as top of bank, slope breaks, bankfull indicators, edge of water, and thalweg.
Channel parameters, based on The Key to the Rosgen Stream Classification of Natural
Rivers (Rosgen 1994), were calculated from the plotted elevation data. These
parameters (entrenchment ratio, width/depth ratio, sinuosity, and substrate) were used to
assign a channel classification type for each cross-section location.
2.2.2 Substrate Characterization
A Wolman pebble count (Wolman 1954) study was performed at all monitoring locations
to characterize the existing grain size distribution of substrate. The Wentworth grain size
classification scale (Wentworth 1922) was used to assign size classes to the substrate.
Substrate particle sizes were plotted by size class and frequency to determine
distributions for each cross section.
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2.2.3 Bank Erosion Hazard Index (BEHI)
Changes in upstream or streamside conditions leading to higher -energy flows can
contribute to streambank erosion, leading to downstream sedimentation and stream
instability. The BEHI (Rosgen 2001) is a fluvial geomorphic assessment that was
conducted to evaluate the susceptibility of potential streambank erosion based on a
combination of multiple factors. Several indicators were evaluated to rank the severity
and probability of streambank erosion at each monitoring location, including the bank
material and/or stratification, root depth and density, streambank angle, the bankfull
height to bank height ratio, and the amount of surface protection present. The BEHI
assessment resulted in a numerical value that corresponded to an overall qualitative
BEHI rating (very low, low, moderate, high, very high, or extreme).
2.2.4 North Carolina Stream Assessment Methodology (NCSAM)
The NCSAM (NCDWQ 2010) was created through a collaborative effort of several
entities, including the USACE, U.S. Department of Transportation Federal Highway
Administration (USFHWA), U.S. Environmental Protection Agency (USEPA), and many
others, to provide the public and private sectors with an accurate, consistent, rapid,
observational, and science -based field method to determine the level of function of
streams within North Carolina. NCSAM was used to assess stream quality and function
at each monitoring location by an evaluation of hydrological influence, water quality, and
biology for each monitoring location.
2.2.5 Photographic Documentation
Photographs were taken at each monitoring location to visually document the existing
conditions of the channel, including views facing upstream, downstream, and each bank
(left and right).
2.3 Quality Assurance/Quality Control
A biologist with Rosgen training (Wildland Hydrology, Inc.) led the field assessments for
baseline condition monitoring. All data transcribed from field data sheets was reviewed
by a second scientist for accuracy and to review documentation maintained for records.
A second Rosgen-trained scientist also reviewed the geomorphic assessments.
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2023 SCF In -Line Detention Basin Baseline Conditions Report
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3 Results
3.1 Rainfall Monitoring
The National Oceanic and Atmospheric Administration (NOAA) Precipitation Frequency
Data Server (NOAA 2023) was consulted to determine point precipitation frequency
estimates at the SCF Project. Channel -forming, bankfull-level discharges typically occur
on a 1.5-year frequency (Rosgen 1996); based on the NOAA point precipitation
frequency estimates, 2.25 inches of rainfall would need to fall within a 6-hour period to
meet this criterion (an average of a one-year storm event of 2.04 inches within 6 hours
and a two-year storm event of 2.46 inches within 6 hours at this location). Between the
commencement of construction in May 2021 and the completion of the basin around May
2023, two 1.5-year storm events occurred: one in July 2021 and one in September 2021
(USGS 2023). These events had the potential to cause natural changes to the streams
by natural streambank erosion, transfer of sediments and substrates, and movement of
natural materials such as woody debris and vegetation.
3.2 Stream Monitoring
Post -construction monitoring was completed on June 29, 2023. In -stream conditions of
Coffey Creek monitoring locations (S25-2, S25-3, and S25-4) and associated unnamed
tributaries (S32-1, S32-2, and S34-1) were not substantially different than those
observed during the pre -construction survey (Table 1). The sections below provide an
analysis of pre- and post -construction conditions for each monitoring location. As
previously stated in Section 2.2, results for monitoring location S25-1 are not included
herein, as this location is monitored only following annual or quarterly post -storm routine
monitoring, to begin six months following the post -construction survey.
3.2.1 S25-2
S25-2 is the most downstream location on Coffey Creek within the flood limits of the
detention basin (Appendix A, Figure 1). Coffey Creek is a perennial stream. At the time
of survey in 2021, S25-2 was assessed to be a Rosgen "F4" stream (Table 1). F4
streams are gravel -dominated, entrenched, deeply incised meandering channels
(Rosgen 1996). The top of bank elevation is much greater than the bankfull stage. F4
channels have low to moderate gradient, exhibit riffle/pool bed features, and have high to
very high width/depth ratios. Sediment supply in the F4 stream type is moderate to high
depending on erodibility conditions. Streambank erosion rates are high with marginal
stability from riparian vegetation. Depositional features are common in this stream type
and, over time, promote development of floodplain inside of the bankfull channel.
Streambanks at S25-2 exhibited some erosion; however, surface protection was present.
The streambed was prevalent with larger substrate with little if any embeddedness.
Blasting activities during construction of the detention basin in late summer 2022 caused
some changes to the stream channel morphology due to the accidental falling of rock
into the riparian buffer, streambank, and streambed. As stated previously, the buffer was
replanted in January 2023; however, it was decided in consultation with NCDWR that
removal of blasted rock from the streambank or streambed would result in even further
disturbance and impacts. Therefore, the rock was left in place. Despite some subsequent
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2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
changes to the stream channel morphology (e.g., lower bankfull cross -sectional area),
conditions of Coffey Creek at S25-2 were similar in 2023 at the time of survey, resulting
in the same F4 Rosgen classification, average particle diameter by mass (D50) of gravel
substrate (although slightly higher D50 in 2023 to "coarse" gravel), and "moderate" BEHI
scores for both left and right banks (Table 1). The NCSAM scores, representing stream
function, were lower than they were surveyed in 2021 and were rated at "medium"
overall. The lower scores were driven by the loss of riparian buffer for the construction of
the detention basin (beyond 10 feet required to be preserved).
3.2.2 S25-3
S25-3 is the middle location on Coffey Creek within the flood limits of the detention basin
(Appendix A, Figure 1). A debris jam was present in the center of the channel at the time
of the pre -construction survey in 2021, which has since been cleared by natural stream
flows. A large tree is now present in the stream channel near the right bank (Appendix C,
Photographs 5 and 6). With the removal of the debris jam, it was evident that the location
of the cross section needed to be adjusted slightly in order to capture the center of the
riffle, and therefore the cross section was moved downstream slightly.
At the time of survey in 2021, S25-3 was classified as a Rosgen "F4" stream (Table 1)
and therefore generally exhibits the characteristics of those listed above for S25-2. As
noted in 2021, the right bank at this location exhibits degradation with a BEHI score of
"high", which remains the case in 2023. BEHI scores for the left bank changed from
"medium" to "low" in 2023. The D5o was documented to be slightly higher in 2023 ("very
coarse gravel" as opposed to "fine gravel"), which may be the result of shifting the cross
section to the center of the riffle which was previously hidden by the debris jam. Smaller
particle sizes are deposited at the head of the riffle or nearer to the glide on the tail of the
pool.
The NCSAM scores were lower during the post -construction survey than the pre -
construction survey, with an overall score of "low" (Table 1). This is due to the
construction of the detention basin, which reduced the riparian buffer on each side of the
stream and contributed to reduced stream shading. The left riparian buffer at S25-3 has
prevalent autumn olive shrubs and herbaceous vegetation, but no trees to provide
shading to the waterbody. During the survey, biologists also noted a high abundance of
algae in the pool upstream of the riffle, likely due in part from the limited shading.
3.2.3 S25-4
S25-4 is the most upstream location on Coffey Creek within the flood limits of the
detention basin (Appendix A, Figure 1). S25-4 was classified as a Rosgen "C4" type
stream during both the pre- and post -construction monitoring surveys (Table 1). C4
streams are slightly entrenched, meandering, gravel -dominated, riffle -pool channels with
well -developed floodplains (Rosgen 1996). C4 stream channels have gentle gradients of
less than 2% and high width/depth ratios. Rates of streambank erosion and lateral
adjustment are influenced by the presence and condition of riparian vegetation. Left and
right streambanks at S25-4 exhibited a "low" BEHI score for erodibility in 2023, compared
to "medium" scores in 2021, indicating good stability (Table 1).
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The substrate characterization was identical to that sampled in 2021, with a D5o of "very
coarse gravel" with little embeddedness and ample interstitial space for aquatic insects.
NCSAM scores declined since 2021 due to the construction of the detention basin and
loss of riparian buffer, now with an overall rating of "medium" stream functionality.
3.2.4 S32-1
S32-1 is the most upstream monitoring location on an intermittent, unnamed tributary to
Coffey Creek located on the western side of the detention basin (Appendix A, Figure 1).
In 2021, S32-1 was classified as a Rosgen "E5" type stream, however it was classified
as "E4" in 2023 due to the prevalence of "very fine gravel" (as opposed to a D5o of
"medium sand" in 2021) identified during the Wolman pebble count survey (Table 1). It is
difficult to determine why the substrate categorization changed. The difference between
medium sand and very fine gravel can be as little as 1.5 mm up to 3.75 mm (a difference
in the lower versus higher ends of the size ranges). A desktop exercise of the landscape
showed no significant changes in the upstream drainage area to S32-1, which consists
mainly of the Charlotte -Mecklenburg Police Department Animal Care and Control facility
(although significant land clearing had occurred at the West Mecklenburg Recycling
Center, a review of topography and stormwater structures suggest the area drains to a
separate unnamed tributary to Coffey Creek and not to S32). The change to substrate
characterization is also unlikely to be attributable to actions on the SCF Project site;
regular construction oversight visits, as well as the stream monitoring visit revealed no
issues with condition of silt fencing along the S32 tributary, and vegetation was intact
with dense growth. Therefore, there are two possible reasons why the D50 may have
changed since the pre -construction monitoring survey: 1) effect of high flows, and 2)
differences in technician observers. Although only two rain events exceeded thresholds
for bankfull events, there were episodes of high rainfall during the three-year period,
including 7.24 inches over the month of April 2023. It is possible that consistent rainfall
could cause flushing of finer substrates from the S32-1 survey location for a period of
time until lower flows allow sand to settle in this area. It is also possible that changes in
technician observers and the length of time between surveys (over three years)
contributed to sample variability, which has been shown to cause differences of up to 15
percent (Olsen et al. 2005). Future monitoring at this location (beginning six months after
the post -construction survey), which may be conducted up to five times per year
depending on storm events, will provide additional information regarding the substrate
characterization of this stream.
In general, E-type streams have low to moderate sinuosity, gentle to moderately steep
channel gradients, and very low channel width/depth ratios (Rosgen 1996). They are
hydraulically efficient and maintain sediment transport capacity (during periods of flow for
intermittent streams). The narrow and relatively deep channels maintain a high
resistance to plan form adjustment which results in channel stability without significant
downcutting. E5 channels are generally stable unless streambanks are disturbed or if
significant changes in sediment supply and/or streamflow occur (such as upstream
development).
Left and right streambanks at S32-1 had "moderate" to "high" BEHI scores due to limited
surface protection and root density (Table 1). The left bank just downstream of S32-1
exhibits significant erosion on the outside meander. The NCSAM scores for S32-1 did
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not change from 2021 to 2023, with an overall score of "high". This is potentially due to a
greater area of riparian buffer that was preserved during the construction of the basin
compared to S25 (Coffey Creek). S32 (associated tributary) is also not considered an
urban stream according to the assessment method because the percent impervious area
is not greater than 24 percent.
3.2.5 S32-2
S32-2 is the downstream monitoring location on the western unnamed tributary to Coffey
Creek (Appendix A, Figure 1). In 2021, the stream at this location was classified as a
"134" Rosgen classification. B4 stream types are moderately entrenched with gradients of
24% and moderate width/depth ratios. The channel bed morphology is dominated by
gravel, and D50 was documented as "fine gravel" in both 2021 and 2023. B4 stream
types are considered to be relatively stable and are not high -sediment supply streams.
During stream monitoring in 2023, S32-2 was again classified as a B4 stream.
Streambanks were previously scored with "moderate" BEHI ratings for both left and right
banks; however, the left bank was scored as "low" in 2023 due to increased root depth
and density related to higher riparian vegetation density. The overall NCSAM score
remained at "high" stream functionality.
3.2.6 S34-1
S34-1 is located on an intermittent stream the eastern side of the detention basin, which
flows southwest to Coffey Creek (Appendix A, Figure 1). Stream conditions in 2023 were
similar to those recorded in 2021, and the stream at this location was classified as a
Rosgen "E5" type stream during both surveys (Table 1). Characteristics of "EY type
streams are described in Section 3.2.4.
The D50 was documented to be the same in 2023 ("medium sand"), streambank
erodibility scored with "low" and "very low" BEHI ratings for both left and right banks at
this stream location, and the overall NCSAM rating remained at "high" stream
functionality.
4 Discussion
With a few minor exceptions noted above, streams S25, S32, and S34 (Coffey Creek
and associated tributaries, respectively) represent similar characteristics during the 2023
post -construction survey as the 2021 pre -construction conditions. All streams were
classified as the same Level II stream types as the previous survey except for S32-1,
which was surveyed to contain slightly coarser substrates in 2023. Plotted cross sections
and data forms completed during the post -construction survey are provided in
Appendix D and Appendix E.
Coffey Creek at locations S25-2 and S25-3 continue to exhibit unstable conditions in
2023, as they did in 2021. The streambanks show significant active erosion in many
areas along these reaches. Cross sections at both of these locations were classified as
"F" type streams, which are characteristically incised with high, unstable streambanks
(Rosgen 1997).
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2023 SCF In -Line Detention Basin Baseline Conditions Report
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Streams and rivers are dynamic systems that change over time when the variables that
shape them are altered, such as the velocity of flow, discharge, and sedimentation and
debris (Rosgen 1997). For example, watershed development (i.e., increase in upstream
impervious area) can lead to larger volumes of water entering a stream at higher
velocities, which can lead to stream degradation. Streams have an "evolutionary
tendency" in response to these external influences, with predictable sequence of events.
The most upstream location surveyed on Coffey Creek (S25-4) was classified as a stable
"C4" cross section, exhibiting slight entrenchment and a moderate to high width/depth
ratio. It is likely that at one time, S25-2 and S25-3 were also "C4" classifications. The
stream channel is seeking equilibrium in response to new hydraulic conditions; in
general, it is actively eroding streambanks in order to establish a new floodplain within
the incised channel (Rosgen 1997). The floodplain will allow for reduction in flow
velocities, which will in turn reduce erosion and facilitate streambank stabilization. Over
time, Coffey Creek in the vicinity of S25-2 and S25-3 may be classified as an "E" type
stream and then "C" type stream, according to the evolutionary stages of channel
adjustment (Rosgen 1994).
No significant changes to stream conditions were observed or documented between pre -
and post -construction monitoring, with the exception of the streamside areas being
converted to detention areas. While the right buffer along Coffey Creek was disturbed in
the in Fall 2022, any sedimentation related to the incident was localized and the buffer
area was immediately stabilized; no effects from this incident were noted from the
conditions assessed at S25-2 during the post -construction survey.
The data collected during the post -construction survey is representative of conditions
which subsequent monitoring events will be compared to, taking into account normal
stream dynamics and fluctuation. In accordance with the Monitoring Plan, the first annual
monitoring event will occur six months after the post -construction baseline survey in late
December 2023 or early January 2024.
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Table 1. Summary of Pre -construction (2021) and Post -construction (2023) Stream Assessments
Entrenchment Ratio
1.3
1.2
1.4
1.2
Bankfull Width (ft.)
38.7
35.3
30.5
28.7
Mean Bankfull Depth (ft.)
2.9
1.7
1.2
1.0
Width/Depth Ratio
13.5
20.8
25.9
30.2
Bankfull Area (sq. ft.)
110.6
59.8
36.0
27.3
Bankfull Maximum Depth (ft.)
3.8
2.4
2.2
1.4
Width of Flood -prone Area (ft.)
51.8
42.5
41.5
35.8
Sinuosity
1.49
1.49
1.49
1.49
Rosgen Stream Type
F4
F4
F4
F4
Average Particle Size (mm)
16.0
30.0
7.7
34.0
Diameter by Mass
Medium
Coarse
Fine
Very
(D50) Material
gravel
gravel
gravel
coarse
gravel
Bank Erosion Hazard Index
Qualitative Score
M/M
M/M
M/H
L/H
(Left Bank/Right Bank)3
NCSAM
Hydrology Score
High
Low
Medium
Low
Water Quality Score
High
Medium
High
Medium
Habitat Score
High
Medium
High
Low
Overall Score
High
Medium
High
Low
'Affected by detention basin construction
activities.
'Location adjusted slightly in 2023 due
to natural shifts
in woody debris
since 2021.
3VL: Very Low; L: Low; M: Moderate;
H: High.
2.8
2.3
2.7
2.5
1.6
1.6
2.4
2.3
19.1
16.2
3.9
4.0
6.8
5.9
1.9
2.0
1.0
1.2
1.1
1.0
0.4
0.5
0.2
0.3
18.9
13.6
3.6
4.2
15.2
13.0
8.6
6.9
19.3
19.3
4.2
3.8
3.0
2.7
0.4
0.6
2.0
2.1
1.0
1.2
0.7
0.8
0.4
0.4
52.8
37.9
10.4
10.1
9.5
9.7
4.7
4.5
1.49
1.49
1.18
1.18
1.18
1.18
1.13
1.13
C4
C4
E5
E4
B4
B4
E5
E5
46.0
46.0
0.45
4.0
7.1
7.6
0.32
0.39
Very
Very
Medium
Very fine
Fine
Fine
Medium
Medium
coarse
coarse
sand
gravel
gravel
gravel
sand
sand
gravel
gravel
M/M
L/L
M/H
H/M
M/M
L/M
L/VL
L/VL
Medium
Medium
High
High
High
High
High
High
High
Medium
Medium
Medium
Low
Low
Low
Low
High
Medium
High
High
High
High
High
High
High
Medium
High
High
High
High
High
High
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5 References
National Oceanic and Atmospheric Administration (NOAA). 2023. NOAA Atlas 14 Point
Precipitation Frequency Estimates: NC. Accessed August 2023. [Online] URL:
https://hdsc.nws.noaa.gov/pfds/pfds map cont.html?bkmrk=nc.
North Carolina Division of Water Quality (NCDWQ). 2010. Methodology for Identification
of Intermittent and Perennial Streams and their Origins, Version 4.11. North
Carolina Department of Environment and Natural Resources, Division of Water
Quality, Raleigh, NC. [Online] URL: Stream ID Manual and Form (nc.gov).
Olsen, D.S., B.B. Roper, J.L. Kershner, R. Henderson, and E. Archer. 2005. Sources of
Variability in Conducting Pebble Counts: Their Potential Influence on the Results
of Stream Monitoring Programs. Journal of the American Water Resources
Association 41(5): 1225-1236.
Rosgen, D.L. 1994. A classification of natural rivers. Catena (22): 169-199.
. 1996. Applied River Morphology. Wildland Hydrology, Pagosa Springs,
Colorado.
1997. A Geomorphological Approach to Restoration of Incised Rivers.
Proceedings of the Conference on Management of Landscapes Disturbed by
Channel Incision. S.S.Y. Wang, E.J. Langendoen, and F.D. Shields, Jr. (eds). 13
PP.
. 2001. A Practical Method for Computing Stream Bank Erosion Rate. In: Pages
9-15 in Proceedings of the 7th Federal Interagency Sedimentation Conference,
Mar 25-29, U.S. Interagency Committee on Water Resources, Subcommittee on
Sedimentation, Reno, Nevada, pp. 9-15.
United States Geological Survey (USGS). 2023. CRN-04 Raingage at Fire Station 30,
Charlotte, NC — 351132080562345. [Online] URL:
https://waterdata.usgs.goy/monitorinq-
Iocation/351132080562345/#Daramete rCode=00045&startDT=2023-06-
01 &endDT=2023-06-30.
Wentworth, C.K. 1922. A Scale of Grade and Class Terms for Clastic Sediments. The
Journal of Geology 30(5): 377-392.
Wolman, M.G. 1954. A Method of Sampling Coarse River -Bed Material. Transactions —
American Geophysical Union, 35, 951-956. [Online] URL:
http://dx.doi.org/l 0.1029/TR03500600951.
10 1 September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report
Charlotte Douglas International Airport
This page is intentionally left blank.
September 26, 2023

LEGEND
r.
r__j CLT IP Boundary
Streams
Wetlands
Open Water
W Approved Stream Impacts
Approved Wetland Impacts
Tr Existing Culverts
Installed Culverts
IS
Flood Limits
0 Feet 300 A
, 01
1:11AR1111 D1111GLM
INTERNATIONAL AIRPORT
A
rVI-MV, T Wetland 2URC N
P0 nd�2 Tfif ��l
4 pi"W 7, pw' &
6,
jau
A
Wetland 22
4
At
I Veo Wetland 26
,Wetland 27-i4,_,,,.4
c4,velao
C
strea;m,25
Wetland
Wetland 24
Wetland 25
4*
SCIF IN -LINE DETENTION BASIN
CHARLOTTE DOUGLAS INTERNATIONAL AIRPORT
FIGURE 1
2023 SCF BASIN MONITORING REPORT

S.�
4
s
Monitoring Location
Left Bank Pin
Right Bank Pin
525-2
35.191213,-80.943266
35.191059,-80.943257
"'w
S25-3
35.19152,-80.944590
35.191453,-80.944691
S25 1.
S25-4
35.192087,-80.943834
35.192131,-80.943870
532-1
35.191843,-80.945801
35.191843,-80.945732
532-2
35.191923,-80.945226
35.191897,-80.945211�
534-1
35.191768,-80.942073
35.191755,-80.942096 IN
Fn (Lug
.�
CHARLOTTE DOLIGLAS"'
INTERNATIONALAIRPONT
LEGEND
Flood Limits
O Monitoring Locations
Streams
0 Open Water
Wetlands
DATA SOURCE: Mecklenburg County Aerial
Imagery (2019)
SCF BASIN MONITORING LOCATIONS
CHARLOTTE DOUGLAS INTERNATIONAL AIRPORT
FIGURE 2
2023 SCF BASIN MONITORING REPORT

2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report
Charlotte Douglas International Airport
This page is intentionally left blank.
September 26, 2023

FN
Proposed Monitoring Plan
Introduction
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
The City of Charlotte — Aviation Department (Applicant) submitted a Department of the Army Phased
Individual Permit (IP) on January 31, 2020, for the proposed expansion of the Charlotte Douglas
International Airport (CLT or Airport) in Mecklenburg County, North Carolina. A component of the Phased
IP proposes stormwater detention in -line with existing channels. During the Public Notice period, the
United States Army Corps of Engineers (USACE) and the North Carolina Department of Environmental
Quality (NCDEQ) Division of Water Resources (DWR) requested a monitoring plan of those channels
subject to in -line detention.
In the application, in -line detentions are proposed on Ticer Branch (Stream 1 [S1]) for the North End
Around Taxiway (NEAT) element and on Coffey Creek (S25) for the South Crossfield Taxiway (SCF)
element. The purpose of an in -line detention is to provide peak discharge reduction for storm events up to
the 100 year event. Both in -line detentions propose permanent impacts as a result of a culvert and berm
that would be sized to reduce peak flows downstream. For purposes of analysis storm frequencies
modeled include the 2-, 10-, 25-, 50-, and 100-year storm events. Additionally, each detention basin also
proposes a culverted stream crossing for road access within a basin for construction and maintenance.
During the design storm event, the streams would overtop their banks and flood the detention area (i.e.
the stream's floodplain) for stormwater detention, but attenuate within 48 hours. Beyond the culvert and
berm and access road culvert in each basin, no other direct impacts as a result of the in -line detention are
proposed to the stream channels. However, the streamside areas of both Ticer Branch and Coffey Creek
would require an earthen embankment, grading, and removal of trees in order to provide the capacity
necessary to detain the designed storm event. A 10-foot vegetated buffer along each stream will be
maintained.
In the Ticer Branch in -line detention, S1 and S2 are proposed to experience flooding of streamside area.
In the Coffey Creek in -line detention, S25, S32, and S34 are proposed to experience flooding of
streamside area. All five channels will require monitoring per the USACE and DWR request.
Monitoring Locations
The location and number of monitoring locations within both the Ticer Branch and Coffey Creek detention
areas and one monitoring location downstream of each detention basin will be identified. These locations
will be submitted to the DWR prior to baseline monitoring implementation. For the Ticer Branch detention
basin, one location will be located downstream of the detention, but before Ticer Branch enters a culvert
that goes beneath 1-485. For the Coffey Creek detention basin, one location will be downstream of the
detention but upstream of the next downstream stream confluence. Permanent monitoring locations will
be field located using GPS grade accuracy, and set prior to construction by setting permanent
monuments on both stream banks to facilitate comparison of data collected during future monitoring
events.
Monitoring locations within the detention basins will be subject to dimension, substrate, Bank Erosion
Hazard Index (BEHI), and North Carolina Stream Assessment Methodology (NCSAM) assessments, as
well as photographic documentation. Monitoring locations downstream of the detention basins will be
subject to substrate and BEHI assessments, as well as photographic documentation.
Page11

FN
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
All monitoring locations are subject to baseline pre- and post -construction events. The monitoring
locations within the detention basins will be subject to both the annual and quarterly monitoring events.
The monitoring locations downstream of the detention basins will be monitored on a quarterly basis only,
within 30 days of a 2-year storm event or greater (a 2-year storm defined as a rain event of at least 2.28
inches within 6 continuous hours). A storm event greater than the 2-year is a 10-year or greater storm (a
10-year storm defined as a rain event of at least 3.72 inches within 6 continuous hours).
Timing/Frequency
BASELINE MONITORING
The baseline monitoring events will take place pre -construction and post -construction. The purpose of the
pre -construction event is to capture existing conditions of streams subject to detention. The post -
construction event is to document any changes between pre -construction and post -construction and
construction conditions; ideally, the post -construction conditions of streams would be the same as
existing conditions pre -construction with the exception of the streamside areas being converted to
detention areas. If a 2-year storm occurs between the pre -construction and post -construction events, it
should be documented and noted that the post -construction baseline would capture any changes from
said storm event prior to the detentions becoming operational. The data collected immediately following
construction would be expected to be representative of conditions that subsequent monitoring events
would be compared to, taking into account normal stream dynamics and fluctuation.
Baseline monitoring event data collection will include dimension, substrate, Bank Erosion Hazard Index
(BEHI), and NCSAM assessments, as well as photographic documentation.
ANNUAL MONITORING
Annual monitoring events will be held on an annual basis for a period of five years post -construction of
both the Ticer Branch and the Coffey Creek detention basins. This annual monitoring will occur
regardless of storm event occurrence. The first annual monitoring event shall occur six months after the
post -construction baseline event occurs. If at the end of the five year period of monitoring, the results
during the monitoring events have not significantly changed since the post -construction baseline
condition, then the annual monitoring requirements shall be successfully satisfied.
Annual monitoring event data collection will include dimension, substrate, Bank Erosion Hazard Index
(BEHI), and NCSAM assessments, as well as photographic documentation at locations within the
detention basins.
ANNUAL MONITORING POST -STORM
Annually, monitoring shall occur within 30 days following the first 10-year storm event or greater for a
period of five years post -construction of both the Ticer Branch and the Coffey Creek detention basins.
Only one annual monitoring event per 10-year or greater storm event is necessary. This post -storm
annual monitoring event could be additional to quarterly events or become the quarterly event, depending
on storm frequency timing.
Post -storm annual monitoring event data collection will include substrate and BEHI assessments, as well
as photographic documentation at locations within the detention basins and downstream of the detention
basins.
QUARTERLY MONITORING
On a quarterly basis, monitoring shall occur within 30 days following the first 2-year storm event or greater
(2-year+) of the respective quarter up to two years. Only one monitoring event per quarter per 2-year+
storm event is necessary. If a 2-year+ storm event does not occur, then monitoring during that respective
Page 12

FN
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
quarter is not required. If at the end of the two year period of quarterly monitoring, the results during the
monitoring events have not significantly changed since the post -construction baseline condition, then the
quarterly monitoring requirements shall be successfully satisfied.
Quarterly monitoring event data collection will include substrate and BEHI assessments, as well as
photographic documentation.
Table 1. Summary of Monitoring Requirements
Monitoring•
uirements
Within
Dimension,
Pre -Construction
1 time
detention
substrate, BEHI,
n/a
basins
NCSAM, photos
Within
Dimension,
Post -Construction 1 time
detention
substrate, BEHI,
n/a
basins
NCSAM, photos
1x/yearfor
Within
Dimension,
Annual
detention
substrate, BEHI,
n/a
5 years
basins
NCSAM, photos
Within and
Annual
1x/year for
downstream
Substrate, BEHI,
10-year or
(Post -Storm)
5 years
of detention
photos
greater
basins
2-year or
Downstream
greater,
Quarterly
4x/year for
Substrate, BEHI,
whichever
(Post -Storm)
2 years
of detention
photos
comes 1st
basins
in a
quarter
Methods
Notes
Conducted regardless of storm
event.
Conducted the 1st time a 10-
year+ event occurs in a year.
Could occur additional to the 4
quarterly events or could be
equal to and take the place of
a quarterly event. If no 10-
year+ storms occur in a year,
then annual monitoring post -
storm would not occur.
Would only be conducted if a
2-year+ storm event occurs in
a quarter. If no 2-year+ storms
occur in a quarter, then
monitoring in that quarter
would not occur.
DIMENSION ASSESSMENT
Dimensional data will be collected based on The Key to the Rosgen Stream Classification of Natural
Rivers which is a classification system that assigns a channel type based on channel slope, width to
depth ratio, bed material, entrenchment ratio, and sinuosity. Permanent cross section monitoring will be
conducted at one or more riffle features that are established during the baseline monitoring events on
each channel subject to in -line detention. A stream classification type will be determined at each cross
section during the baseline events as well as subsequent monitoring events. Graphical representations of
cross sections will be provided and as data is collected year to year, the graphical representations will be
overlaid to each other for comparison.
Data collected in dimensional assessment will be presented as a list of parameters (Table 1) resulting in a
Rosgen Classification channel type, which represents the measure of all dimension assessment
parameters. Classifying a channel type based on Rosgen methodology on an annual basis allows for
observation in shifts of channel geomorphology, if any. Geomorphological evolution is a natural channel
Page 13

FN
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
process, that when observed, doesn't necessarily indicate channel degradation, but does provide insight
as to whether or not a channel is widening, incising, straightening, or experiencing sediment loading
based on the measured parameters.
The Rosgen Classification channel type is not expected to significantly change from baseline conditions;
however, if channel type changes do occur, then it would be expected that one or more parameter has
significantly been altered from the baseline channel classification type. Further analysis of the individual
parameters (i.e. substrate) would need to be evaluated to determine if degradation has occurred.
SUBSTRATE
A Wolman pebble count is a characterization of the composition of streambed and bank substrate
material. Monitoring substrate during monitoring events can indicate changes in stream character, erosion
rates, and sediment supply. Wolman pebble counts categorize substrate types into silt/clay, sands,
gravels, cobbles, boulders, and bedrock, which are sub -categorized within the substrate types based on
diameter size. The data collected from a substrate sample can be analyzed by sizes (diameter in mm)
and by distribution of size. For example, D50 is the median diameter of a substrate sample and also the
diameter size at which 50% of the substrate particles are smaller and 50% of the substrate particles are
larger than the mean diameter distributed across a sample.
Wolman pebble count methodology will be utilized to calculate the D50 of the stream bed material to
establish baseline particle size and distribution at the permanent cross -sections to aid in determining
Rosgen classification channel type. The post -construction baseline D50 will also be the parameter to
which future substrate analysis would be compared. If future substrate monitoring indicates a trend of the
Dso shifting to a smaller particle size diameter (by more than 20% of original size) after three substrate
monitoring events, then DWR will be notified and remedial actions will be evaluated for consideration.
BANK EROSION HAZARD INDEX
While stream bank erosion is a natural process that occurs in every watershed, excessive erosion has
serious adverse consequences for the physical and biological function of streams and rivers. It is often
difficult, however, to distinguish between streambanks that are eroding at a natural rate from those that
are or have the potential to erode at unnaturally high rates due to altered watershed hydrology or
sediment loads. The Bank Erosion Hazard Index (BEHI) is a methodology for assessing streambank
erosion condition and potential that assigns point values to bank condition. BEHI will be assessed utilizing
the modified BEHI procedure that includes ratios of root depth to bank height, root density in percentage,
surface protection in percent, and bank angle in degrees.
The BEHI scoring falls into six categories ranging from Very Low to Extreme. In reference to the post -
construction baseline BEHI scores, if future monitoring events produce a BEHI score two categories
greater than the baseline from three subsequent events, then DWR will be notified and remedial actions
will be evaluated for consideration. DWR will be contacted if the baseline score is "Extreme", for further
discussion and possible procedure modification.
NORTH CAROLINA STREAM ASSESSMENT METHODOLOGY
The North Carolina Stream Assessment Methodology (NCSAM) will be utilized to assess stream quality
and function at each cross section. The assessment length at each cross section will be 100 feet
upstream and downstream of the cross section location. The NCSAM method provides for an evaluation
of streamside riparian vegetation as well as a field assessment of hydrological influence, water quality,
and biology within a reach. However, due to the nature of the detention construction, the streamside
areas will be cleared of trees with the exception of a 10-foot vegetated buffer. The NCSAM assessments
Page14

FN
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
should take into consideration the NCSAM matrices that assess vegetated buffer parameters so that the
detention construction itself does not influence the NCSAM scores.
PHOTOGRAPHIC DOCUMENTATION
Photographs looking upstream and downstream at each monitoring location will be taken during the
baseline monitoring to visually document the existing conditions of the channels. Photographs will also be
taken post -construction, and at annual and quarterly monitoring events. Photographs will be provided in
both the annual and quarterly reports, but will also be displayed side by side over time as the
photographs are collected.
Summary
The proposed monitoring plan for the channels subject to in -line detention will consist of multiple
measurements and assessments noted above that will provide a way to track the geomorphology,
substrate, stability, and quality of the channels over time. Pre- and post -construction baseline conditions
will be presented with a short cover letter and report of findings will be provided to the USACE and DWR
for review. Subsequently, after each annual and quarterly monitoring event, a short cover letter and report
of findings will be provided for review.
At each cross section identified within the detention basins, dimensional data, substrate characterization,
NCSAM, BEHI will be assessed and described above. A variation of the following table will be utilized to
report baseline, annual, and quarterly data at each cross-section. At each monitoring location identified
downstream of the detention basins, substrate characterization and BEHI will be assessed and described
above.
Table 2. Example Table for Assessment Data
Parameter Stream # Stream # Stream #
Cross Section # Cross Section # Cross Section #
Bankfull Width (ft)
Floodprone Width (ft)
Bankfull Mean Depth (ft)
Bankfull Max Depth (ft)
Bankfull Cross Sectional Area (ft2)
Width/Depth Ratio
Entrenchment Ratio
D5o (mm)
Rosgen Classification
NCSAM Score
BEHI
A variation of the following table will be utilized to report overall data after each collection event over time.
Stream # #
Stream # #
Stream # #
Stream # #
Page 15

FN
Methodology References
CLT Airport Expansion I SAW-2018-01071
In -Line Detention Monitoring Plan
August 4, 2020
The Key to the Rosgen Stream Classification of Natural Rivers:
https://wildlandhydrology.com/resources/docs/River%20Restoration%20and%20Natural%20Channel%20
Design/Rosgen 2011 Natural Channel Design.pdf
Wolman Pebble Count:
htti)s://dep.wv.gov/WWE/getinvolved/sos/Documents/SOPs/PebbleCount Methods.pdf
Bank Erosion Hazard Index:
https://dep.wv.gov/WW E/getinvolved/sos/Documents/SOPs/BEH I-Overview.pdf
North Carolina Stream Assessment Methodology:
https://www.saw.usace.army.mil/Portals/59/docs/regulatory/pubIicnotices/2013/NCSAM Draft User Man
ual 130318.pdf
Page 16

2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
ppendix C —
Representative
Photographs taken during
the Post -Construction
Stream Survey on June
29, 2023
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report
Charlotte Douglas International Airport
This page is intentionally left blank.
September 26, 2023

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Photo 21. View of eastern UT to Coffey Creek, S34-1, facing upstream. Photo 22. View of eastern UT to Coffey Creek, S34-1, facing downstream.*
11 jpj�11111 1110I.M.111111 I., 111111� I
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Photo 23. View of eastern UT to Coffey Creek, S34-1, facing left bank. Photo 24. View of eastern UT to Coffey Creek, S34-1, facing right bank.
*Representative photo of S34-1 taken April 2021; qualitative BE H I scores were identical between sampling events.

2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report
Charlotte Douglas International Airport
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September 26, 2023

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-7
0 5 10 15 20 25 30 35 40 45
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•••••• Bankfull Width — —Flood-Prone Width —Water Surface

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Horizontal Distance (feet)
Bankfull Width Flood -Prone Width Water Surface
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1
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—
w
c
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w
.....................
,
-3
-4
0 5 10 15
Horizontal Distance (feet)
•••••• Bankfull Width Flood -Prone Width Water Surface
*undercut bank based on 2021survey

1
S32-2 Riffle
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-3
-4
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2023 SCF In -Line Detention Basin Baseline Conditions Report ���
Charlotte Douglas International Airport
September 26, 2023

2023 SCF In -Line Detention Basin Baseline Conditions Report
Charlotte Douglas International Airport
This page is intentionally left blank.
September 26, 2023

LB
Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream:'-'") Location:
Station: )'(� "'`� _ Observers:,
Date: Stream Type 1 (' ° Valley Type:
BEHI Score
Studv Bank Heiaht / Bankfull Heiaht ( C) (Fig. 5-19)
Study
Bankfull
Bank
�}
Height
�.`
(A) / (B) _
s
Heigh (ft) =
4 (A)
(ft) =
B
(C)
Root Depth / Studv Bank Heiaht ( E )
Root
Depth
t�
Study
Bank
(D ) / (A) _
t�
ft =
(D)
Height (ft) _
(A)
,`1(E)
Weighted Root Density ( G )
Root
/
Density
Bank Angle ( H )
Bank
.
Angle
ri (
G
(H)IF'
as Degrees =
Surface Protection ( I )
Surface
Protection
((1 .l
1 f
as /o —
- Bank.Material Adjustment:
------- - ------ry ------------------------------------------------
Bedrock (Overall Ve Low BEHI)
Bank Material
Boulders (overall Low BEHI)
------------ -------Ad-----------
_xY.
Cobbleustment
(Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
Stratification Adjustment
percentage of bank material that is composed of sand)
Add 5-10 points, depending on =
Sand (Add 10 points)
position of unstable layers in I
Slit/Clay (no adjustment)
relation to bankfull stage
Very Low Low Moderate I High Very High Extreme
Adjective Rating Im
••fr,
and i
..-®-
i
5 - 9.5 10 -19.5 20 - 29.5 1 30 - 39.5 40 - 45 46 - 50
Total Score
W
Bank Sketch
; .r--
* y `, '•. Root
epth (D)
¢¢
Bank
r rn Angle
SH)
----Bankfull---------- - - - --
J m 'I U O
t � t •t U
a.
Start
of
Bank
5 6
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

r
1 .
F 9
2
1
0
Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: C,o- - , Location:
fi
Station: 2 j Observers.
Date: '�-o Z ,� I "1, o 2 Stream Type: Valley Type:
BEHI Score
Studv Bank Height / Bankfull Heiciht ( C) (Fig. 5-19)
Study
Bankfull
Bank
i
Height'
(A)/(B)
Hei lit (a) =
(A)
(it) =
B
Root Depth l Study Hank Hetcitlt ( Ir )
Root
Study
s
Depth
I
Bank
i)
( D) (A)
ft) _
(D)
Height (ft) =
(A)
(E}
Weitahted Root Densitv ( G )
Root
Density
(F)x(E)
�'�. o
as %
F
(�)
Sank Material Adjustment:
-------------------------------------------------------�_
Bedrock (Overall Very Low BEHI)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-1e points depending on
percentage of bank material that Is composed of sand)
Sand (Add 10 points)
Silt/Clay (no adjustment)
Very Low Low Moderate High Very High Extreme
5-9.5 10-19.5 120-29.5 1 30-39.5 I 40-45 46-50
Bank Sketch
12
p
11
10
no
o �
N
Fx
rn
___Bankfull_ __-_-_.,_�_
J m
0 1 2 3 4 5 6
Horizontal distance (ft)
Dank Ancile ( H )
Bank
Angle 1IOU 11
as Degrees = H"
Surface Protection ( I )
Surface
Protection
as %
Bank Material
----AgJustment
Stratification Adjustment
Add 5-10 points, depending on
position of unstable layers in
relation to bankfull stage
Adjective Rating
> and 1''
��.._.._
Total Score
Root
opth (D)
Bank
Angle
U O
m
� v
W o
n.
start
of
Bank
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

Wolman � > ible Count
Project: Site = :�— I Date '
Habitat Type (circle): Riffle Pool
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
very fine sand
0.062 - 0.125
Sand
fine sand
0.125 - 0.25
medium sand
0.25 -0.5
coarse sand
0.5 - 1
a. ;
very coarse sand
1 - 2
very fine gravel
2 - 4
Gravel
fine gravel
4 - 6
fine gravel
6 - 8
medium gravel
8 - 11
medium gravel
11 - 16
coarse gravel
16 - 22
coarse gravel
22 - 32
very coarse gravel
32 - 45
very coarse gravel
45 - 64
small cobble
64 - 90
medium cobble
90 - 128
Cobble
�-
large cobble
128 - 180
very large cobble
180 - 256
small boulder
256 - 362
Boulder
small boulder
362 - 512
-
medium boulder
512 - 1024
-
large boulder
1024 - 2048
very large boulder
2048 - 4096
✓'
bedrock
y
clay hardpan
detritus/wood {
�
artificial `°
Total

NC SAM FIELD ASSESSMENT FORM
ACcomoanles uratt user Manual: marcn zul3
USACE AID #: NCDWQ #
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic
quadrangle, and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property,
identify and number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for
detailed descriptions and explanations of requested information. Record in the "Notes" section if supplementary measurements were
performed. See the NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
1. Project name (if any): C (� 2. Date of evaluation: �0
3. Applicant/owner name: _COO4. Assessor name/organization:'T /(L.
5. County: 6. Nearest named water body /
7. River basin: ('A,hA yN A o USGS 7.5-minute quad: CO& u*L
8. Site coordinates (decimal degrees, at lower end of assessment reach):
STREAM INFORMATION: (depth and wiidth an be approximations)
9. Site number (show on attached map): ,� 2 Cj — 1 10. Length of assessment reach evaluated (feet): LQ
11. Channel depth from bed (in riffle, if present) to top of bank (feet): ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): i 13. Is assessment reach a swamp stream? ❑Yes XNo
14. Feature type: OPerennial flow ❑Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑Mountains (M) NPiedmont (P) ❑Inner Coastal Plain (1) ❑Outer Coastal Plain (0)
16. Estimated geomorphic l
valley shape (skip for ga ❑b
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip 1 ❑Size 1 (< 0.1 miz) ❑Size 2 (0.1 to < 0.5 mi2� Size 3 (0.5 to < 5 miZ) ❑Size 4 (Z 5 miZ)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? OYes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑11 ❑III ❑IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑High Quality Waters/Outstanding Resource Waters
❑Publicly owned property NCDWQ riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish 303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ONO
1. Channel Water — assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
A Water throughout assessment reach.
B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction — assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
XB Not A
3. Feature Pattern — assessment reach metric
❑Q A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
Not A
4. Feature Longitudinal Profile — assessment reach metric
)(A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming,
over widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of
these disturbances).
❑B Not A
5. Signs of Active Instability — assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
❑A < 10% of channel unstable
Elp 10 to 25% of channel unstable
C > 25% of channel unstable
vii

2 C, 1
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
12. Aquatic Life —assessment reach metric (skip for Tidal Marsh Streams)
12a. ]Ayes to Was an in -stream aquatic life assessment performed as described in the User Manual?
I 'No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. NrYes ❑No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
` apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ []Adult frogs
❑ ❑Aquatic reptiles
❑ Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ Beetles (including water pennies)
❑ Caddisfly larvae (Trichoptera [T])
❑ ;Asian clam (Corbicula)
❑ ®Crustacean (isopod/amphipod/crayfish/shrimp)
❑ []Damselfly and dragonfly larvae
❑ P(Dipterans (true flies)
❑ ❑Mayfly larvae (Ephemeroptera [E])
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ osquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ Mussels/Clams (not Corbicula)
❑ Other fish
❑ ❑Salamanders/tadpoles
❑ ❑Snails
❑ ❑Stonefly larvae (Plecoptera [P])
❑ QTipulid larvae
❑ Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland
runoff.
LB RB
gA A Little or no alteration to water storage capacity over a majority of the streamside area
B B Moderate alteration to water storage capacity over a majority of the streamside area
❑C ❑C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil
compaction, livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Unaltered or majority of streamside area with depressions able to pond water'a 6 inches deep
❑B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
;]C -C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
Y Y Are wetlands present in the streamside area?
N N
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction that passes some flow during low -flow periods affecting assessment reach (ex: beaver dam, bottom -release dam)
❑D Evidence of bank seepage or sweating (iron oxidizing bacteria in water indicates seepage)
❑E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
NC Urban stream (>! 24% impervious surface for watershed) Lf J /
D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
OF None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
XA Stream shading is appropriate for the stream category (may include gaps associated with natural processes)
B Degraded (example: scattered trees)
El Stream shading is gone or largely absent
ix

Z_S�. ? ( 1 )
Applied Fluvial Geomorphology Day 2: Field Day
SURVEY DATA
SITECL7 �-(F
Location:2-
PMy / Notes: H
Distance, Height of
Point, or Back -Sight Instrument Fore -Sight
STATION B S HI F S
Date:
uc
REMARKS
COMMENTS
Elevation NOTES
ff
1
1
2 aq
2
'3'oo
3
4
'2
5
T
6
7
8
9
10
11
12
10, 31
13
14
19,1
15
2
16
-43,
17
2
18
19
20
21
22
30j
-I
23
24
'7' -4
t
25
26
27
128
3
A22 Copyright (D 2015 Wildland Hydrology

Applied Fluvial Geomorphology
-2, 2-
Day 2: Field Day
SURVEY DATA (OR(0,010 - amonow 2
SITE: (,j S6F Date: W-",qboz,4
STATION
B S
HI
FS
Elevation
COMMENT I REMARKS11
R�L I
Item
ft
ft
ft
29
J
30
31
qfi
o
32
,'Io �-
33
34
35
36
37
38
39
40
41
42
43
A
'i
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Copyright 0 2015 Wildland Hydrology A23

}
Wolman , -able Count
Project: Site: �. Date: Habitat Type (circle): Riffle Pool
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
C
Z
very fine sand
0.062 - 0.125
Sand
fine sand
0.125 - 0.25
medium sand
0.25 - 0.5
4
Z
coarse sand
0.5 - 1
Z
very coarse sand
1 - 2
4
very fine gravel
2 - 4
Gravel=
fine gravel
4 - 6
fine gravel
6 - 8
medium gravel
8 - 11
medium gravel
11 - 16
coarse gravel
16 - 22
`
coarse gravel
22 - 32
very coarse gravel
32 - 45
very coarse gravel
45 - 64
w�
small cobble
64 - 90
Cobble
medium cobble
90 - 128
large cobble
128 - 180
very large cobble
180 - 256
small boulder
256 - 362
Boulder
j
small boulder
362 - 512
medium boulder
512 - 1024
large boulder
1024 - 2048
very large boulder
2048 - 4096
bedrock
clay hardpan
detritus/wood
artificial
Total
,''

2�--I L-F)
Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5.19 with BEHI variables to determine BEHI score.
Y
Stream: ���; { r'.z �� Location:
Station: 'L (� Observers:, % r
Date: Stream Type: w,Valley Type:
BEHI Score
Study Bank Height / Bankfull Height ( C) (Fig. 5-19)
Study
Bankfull
Bank
Height
a�
(A) / (B) _
`
1
1� E
Hei ht (ft) =
A
( )
(ft) _
B
(C)
Root Depth / Study Bank Heiqht ( E 1
Root
Study
Depth
�.�
Bank
s
(D) / (A) _
0 e t 1
� j 0
ft =
(D)
Hei ht (ft) =
(A)
(E)
Weighted Root Density ( G )
Root ¢
Density -o (F) x (E)F
as % = F (G)
.Bank Angle ( H )
Bank
Angle
as Degrees = H
Surface Protection ( I )
Surface
Protection
as % _
Bank.Material Adjustment:
Bedrock (Overall Very Low BEHI) > Bank Material
Boulders (Overall Low BEHI) _ -----Adjustment
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on Stratification Adjustment
percentage of bank material that is composed of sand) Add 5-10 points, depending on l
position of unstable layers in
Sand (Add 10 points) ,
Slit/Clay (no adjustment) relation to bankfuli stage
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

25-2-
Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5.19 with BEHI variables to determine BEHI score.
Stream: (, (4z Location:
Station: Observers: i✓,
Date: �1 '761 Stream Type: (tor . Valley Type:
BEHI Score
Studv Bank Height / Bankfull Height ( C) (Fig. 5-19)
Study
Bank
r
Bankfull
Height
(A) / (B) =
3 P'>
O D1D
11 1
2 i9
°
(C)II
1 1
Height (ft) =
(A)
(ft) _
B
Root Depth / Studv Bank Height ( E )
Root
Study
Depth
Id
Bank
(D) / (A)
_
ft =
(D)
Hei ht (ft) =
(A)
(.)
Weighted Root Densitv ( G )
Root
Density I j (F)x(E) `
as%= F�)
Bank.Material Adjustment:
---------------------------------------------------------------
Bedrock (Overall Very Low BEHI) �
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Sand (Add 10 points)
Slit/Clay (no adjustment)
Bank Angle ( H )
Bank
Angle <�
as Degrees = H
Surface Protection ( I )
Surface
Protection
as % _
Stratification Adjustment
Add 5-10 points, depending on
position of unstable layers in
relation to bankfull stage
a
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
user mianuai version z.,i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.191129,-80.943252
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S25-2 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 7.92 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 54.2 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ®Perennial flow ❑Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A ��� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ❑Size 1 (< 0.1 miz) ❑Size 2 (0.1 to < 0.5 miz) ®Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 mil)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III ❑IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water - assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not A
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not A
4. Feature Longitudinal Profile - assessment reach metric
®A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
❑B Not A
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
❑A < 10% of channel unstable
❑B 10 to 25% of channel unstable
®C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
❑A ❑A
Little or no evidence of conditions that adversely affect reference interaction
❑B ❑B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
®C ®C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
❑G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
®J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
®A Multiple aquatic macrophytes and aquatic mosses m 0 ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) M m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent g ❑H Low -tide refugia (pools)
vegetation NC ❑I Sand bottom
®C Multiple snags and logs (including lap trees) r o ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots 0 2 ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate —assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach — whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
® ❑ ❑ ❑ ❑ Bedrock/saprolite
❑ ® ❑ ❑ ❑ Boulder (256 — 4096 mm)
❑ ❑ ® ❑ ❑ Cobble (64 — 256 mm)
❑ ❑ ❑ ® ❑ Gravel (2 — 64 mm)
❑ ❑ ® ❑ ❑ Sand (.062 — 2 mm)
❑ ® ❑ ❑ ❑ Silt/clay (< 0.062 mm)
❑ ® ❑ ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ®Yes ❑No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ❑Adult frogs
❑ ❑Aquatic reptiles
❑ ®Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ®Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
❑ ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ❑Damselfly and dragonfly larvae
❑ ❑Dipterans
❑ ®Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ®Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ®Other fish
❑ ❑Salamanders/tad poles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
❑A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
®C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
❑B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
®C ®C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
ON ON
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
❑E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
®C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
❑F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
❑A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
®B Degraded (example: scattered trees)
❑C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB RB
❑A ❑A ❑A ❑A >_ 100 feet wide or extends to the edge of the watershed
❑B ❑B ❑B ❑B From 50 to < 100 feet wide
❑C ❑C ❑C ❑C From 30 to < 50 feet wide
®D ❑D ®D ❑D From 10 to < 30 feet wide
❑E ®E ❑E ®E < 10 feet wide or no trees
20. Buffer Structure — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
❑A ❑A Mature forest
®B ®B Non -mature woody vegetation or modified vegetation structure
❑C ❑C Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D Maintained shrubs
❑E ❑E Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
❑A ❑A Medium to high stem density
®B ®B Low stem density
❑C ❑C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
®A ❑A The total length of buffer breaks is < 25 percent.
❑B ®B The total length of buffer breaks is between 25 and 50 percent.
❑C ❑C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
❑A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
❑B ❑B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
®C ®C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑B 46 to < 67 ❑C 67 to < 79 ❑D 79 to < 230 ❑E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway Date of Assessment 6/29/2023
detention basin
Stream Category Pa3 Assessor Name/Organization
EBS/JK - HDR
Notes of Field Assessment Form (Y/N)
NO
Presence of regulatory considerations (Y/N)
YES
Additional stream information/supplementary measurements included (Y/N)
NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream)
Perennial
USACE/ NCDWR
Function Class Rating Summary
All Streams Intermittent
(1) Hydrology
LOW
(2) Baseflow
HIGH
(2) Flood Flow
LOW
(3) Streamside Area Attenuation
LOW
(4) Floodplain Access
LOW
(4) Wooded Riparian Buffer
LOW
(4) Microtopography
LOW
(3) Stream Stability
MEDIUM
(4) Channel Stability
LOW
(4) Sediment Transport
HIGH
(4) Stream Geomorphology
MEDIUM
(2) Stream/Intertidal Zone Interaction
NA
(2) Longitudinal Tidal Flow
NA
(2) Tidal Marsh Stream Stability
NA
(3) Tidal Marsh Channel Stability
NA
(3) Tidal Marsh Stream Geomorphology
NA
(1) Water Quality
MEDIUM
(2) Baseflow
HIGH
(2) Streamside Area Vegetation
LOW
(3) Upland Pollutant Filtration
LOW
(3) Thermoregulation
MEDIUM
(2) Indicators of Stressors
NO
(2) Aquatic Life Tolerance
HIGH
(2) Intertidal Zone Filtration
NA
(1) Habitat
MEDIUM
(2) In -stream Habitat
HIGH
(3) Baseflow
HIGH
(3) Substrate
HIGH
(3) Stream Stability
LOW
(3) In -stream Habitat
HIGH
(2) Stream -side Habitat
LOW
(3) Stream -side Habitat
LOW
(3) Thermoregulation
MEDIUM
(2) Tidal Marsh In -stream Habitat
NA
(3) Flow Restriction
NA
(3) Tidal Marsh Stream Stability
NA
(4) Tidal Marsh Channel Stability
NA
(4) Tidal Marsh Stream Geomorphology
NA
(3) Tidal Marsh In -stream Habitat
NA
(2) Intertidal Zone
NA
Overall
MEDIUM

Applied Fluvial Geomorphology Day 2: Field Day
SURVEY DATA CA0310-8)ECTYUN I
SITE: C.LT' �Kjv- Date: to h-
Location: a'S-3
Part y / Notes: HUC:
Distance,
Point, or
STATION
Back -Sight
B S
Height of
Instrument
H I
Fore -Sight
F S
Elevation
RE MARKS
COMMENTS b
NOTES
---------- ---
Item
ft
ft
ft
ft
ft
1
®
2r -S6
2
3
It .16
4
4
5
4if
6
7
8
Ldh'
9
10
k4 ko
11
12
o2
13
14
15
16
7_
20
17
2-
3t
18
31
10
19
32,
20
3 �
("'o
21
2(a
r_-LX'
22
3 7,
10
23
24
3'7
25
q0
26
27
28
q2,T
A22 yL Copyright 0 2015 Wildland Hydrology TD6

olmanable Count
Project: (`� ' Site: �, Z�-:% Date ? Habitat Type (circle): Riffle Pool
i a
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
Ti
very fine sand
0.062 - 0.125
Sand
l
fine sand
0.125 - 0.25
medium sand
0.25 - 0.5
�t
coarse sand
0.5 - 1
very coarse sand
1 - 2
0 �'
very fine gravel
2 - 4
Gravel
fine gravel
4 - 6
fine gravel
6 - 8
°
2
medium gravel
8 - 11
°
medium gravel
11 - 16
coarse gravel
16 - 22
coarse gravel
22 - 32
very coarse gravel
32 - 45
very coarse gravel
45 - 64
1-7
small cobble
64 - 90
Cobble
medium cobble
90 - 128
large cobble
128 - 180
,
very large cobble
180 - 256
small boulder
256 - 362
Boulder
small boulder
362 - 512
%
medium boulder
512 - 1024
large boulder
1024 - 2048
very large boulder
2048 - 4096
bedrock
clay hardpan
detritus/wood
artificial
Total
<'

1
Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5.19 with BEHI variables to determine BEHI score.
Stream: (A f " Location:
Station: Observers: 1~(3 S!r
Date: if Stream Type: Valley Type:
BEHI Score
Studv Bank Heiaht / Bankfull Heiaht ( C) (Fig. 5-19)
Study
Bankfull
Bank
2 _p 7-
�
Height
t �
(A) / (B) I
c�
Height (ft) _
. (A)
(ft) _
B
Root Depth / Studv Bank Height ( E )
Root
Study
Depth
.;q-Z
Bank
3 ,-
(D) � (A)
� 4 �
j , U ,>
ft =
(D)
Height (ft) =
(A)
(E.)
Weiahted Root Densitv ( G )
Root
Density C o/ (F)x(E) _ 7, 90 r , 1
S
as % _ / F (G) !
Bank.Materiai Adjustment:
---------------------------------------------------------------
Bedrock (Overall Very Low BEHI)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Sand (Add 10 points)
Slit/Clay (no adjustment)
. Bank Angle ( H )
Bank
Angle
w D1E
J ' s.
as Degrees =
H
. . . . . .
Surface Protection ( I )
Surface
Protection(
Bank Material .
Stratification Adjustment
Add 5-10 points, depending on
position of unstable layers in
relation to bankfull stage
Root
epth (D)
J Bank
Angle
1 U O
U
7 �
N O
n
Start
of
Bank
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

IN'orksheet 5-8. Form to calculate Bank Erosion Hazard index (BEHI) variables and an overall BEHI rating
(Rosger, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: (X (r^ C r c '( Location: C!> i F S c
Station: 25 '� ��) Observers: c
Date: 1,0 ( Z 011 ?-, 2 Stream Type: 0 "" Valley Type:
BEHI Score
Study Bank Heiaht / Bankfull Heiaht ( C) (Fig. 5-19)
Study
Bank
G�
Bankfull
Height
(
(A) / (B)-=�
Height (ft) _
(A)
(ft) =
B
(C)
Root Depth / Study Bank Height ( E )
Root
Study
Depth
Bank
$.. 0
(D) / (A) =
D L 3�1.
't4, C,? i
ft =
(D)
Height (ft) _
(A)
(E)
Weiahted Root Density ( G )
Root
Density
t l ./
(F) x (E) _
;.;
7t
I
as % _
/ F
(G)l
Bank Anale If H )
Bank
Angle
/ 0/ ��
as Degrees =J
H
Surface Protection ( I )
Surface
Protection t
= f(I)
Bank.Material Adjustment: as%
------------------------------------------------------------------------
Bedrock (overall Very Low BEHI) Bank Material
Boulders (Overall Low BEHI) A
---------------------- -djustment
Cobble (Subtract 10 points if uniform medium to large cobble)
----------
Gravel or Composite Matrix (Add 5-10 points depending on Stratification Adjustment
percentage of bank material that is composed of sand) Add 5-10 points, depending on
Sand (Add 10 points) position of unstable layers in I
Silt/Clay (no adjustment) relation to bankfull stage ,
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
user mianuai version z.,i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.191501,-80.944630
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S25-3 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 3.72 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 40.5 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ®Perennial flow ❑Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A ��� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ❑Size 1 (< 0.1 miz) ❑Size 2 (0.1 to < 0.5 miz) ®Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 mil)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III ❑IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water - assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not A
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not A
4. Feature Longitudinal Profile - assessment reach metric
®A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
❑B Not A
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
❑A < 10% of channel unstable
❑B 10 to 25% of channel unstable
®C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
®A ❑A
Little or no evidence of conditions that adversely affect reference interaction
❑B ®B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
❑C ❑C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
®G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
❑J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
®A Multiple aquatic macrophytes and aquatic mosses m 0 ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) M m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent g ❑H Low -tide refugia (pools)
vegetation NC ❑I Sand bottom
®C Multiple snags and logs (including lap trees) r o ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots 0 2 ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate —assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach — whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
® ❑ ❑ ❑ ❑ Bedrock/saprolite
❑ ® ❑ ❑ ❑ Boulder (256 — 4096 mm)
❑ ❑ ® ❑ ❑ Cobble (64 — 256 mm)
❑ ❑ ❑ ® ❑ Gravel (2 — 64 mm)
❑ ❑ ® ❑ ❑ Sand (.062 — 2 mm)
❑ ❑ ® ❑ ❑ Silt/clay (< 0.062 mm)
❑ ® ❑ ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ®Yes ❑No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ®Adult frogs
❑ ❑Aquatic reptiles
❑ ®Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ❑Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
❑ ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ®Damselfly and dragonfly larvae
❑ ®Dipterans
❑ ❑Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ®Other fish
❑ ❑Salamanders/tad poles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
❑A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
®C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
❑B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
®C ®C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
ON ON
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
®E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
®C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
❑F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
❑A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
❑B Degraded (example: scattered trees)
®C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB RB
❑A ❑A ❑A ❑A >_ 100 feet wide or extends to the edge of the watershed
❑B ❑B ❑B ❑B From 50 to < 100 feet wide
❑C ❑C ❑C ❑C From 30 to < 50 feet wide
®D ®D ❑D ❑D From 10 to < 30 feet wide
❑E ❑E ®E ®E < 10 feet wide or no trees
20. Buffer Structure — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
❑A ❑A Mature forest
❑B ❑B Non -mature woody vegetation or modified vegetation structure
®C ®C Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D Maintained shrubs
❑E ❑E Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
❑A ❑A Medium to high stem density
❑B ❑B Low stem density
®C ®C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
❑A ❑A The total length of buffer breaks is < 25 percent.
❑B ❑B The total length of buffer breaks is between 25 and 50 percent.
®C ®C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
❑A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
❑B ❑B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
®C ®C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑B 46 to < 67 ❑C 67 to < 79 ❑D 79 to < 230 ❑E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway Date of Assessment 6/29/2023
detention basin
Stream Category Pa3 Assessor Name/Organization
EBS/JK - HDR
Notes of Field Assessment Form (Y/N)
NO
Presence of regulatory considerations (Y/N)
YES
Additional stream information/supplementary measurements included (Y/N)
NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream)
Perennial
USACE/ NCDWR
Function Class Rating Summary
All Streams Intermittent
(1) Hydrology
LOW
(2) Baseflow
HIGH
(2) Flood Flow
LOW
(3) Streamside Area Attenuation
MEDIUM
(4) Floodplain Access
HIGH
(4) Wooded Riparian Buffer
LOW
(4) Microtopography
LOW
(3) Stream Stability
LOW
(4) Channel Stability
LOW
(4) Sediment Transport
MEDIUM
(4) Stream Geomorphology
MEDIUM
(2) Stream/Intertidal Zone Interaction
NA
(2) Longitudinal Tidal Flow
NA
(2) Tidal Marsh Stream Stability
NA
(3) Tidal Marsh Channel Stability
NA
(3) Tidal Marsh Stream Geomorphology
NA
(1) Water Quality
LOW
(2) Baseflow
HIGH
(2) Streamside Area Vegetation
LOW
(3) Upland Pollutant Filtration
LOW
(3) Thermoregulation
LOW
(2) Indicators of Stressors
YES
(2) Aquatic Life Tolerance
MEDIUM
(2) Intertidal Zone Filtration
NA
(1) Habitat
LOW
(2) In -stream Habitat
MEDIUM
(3) Baseflow
HIGH
(3) Substrate
MEDIUM
(3) Stream Stability
LOW
(3) In -stream Habitat
HIGH
(2) Stream -side Habitat
LOW
(3) Stream -side Habitat
LOW
(3) Thermoregulation
LOW
(2) Tidal Marsh In -stream Habitat
NA
(3) Flow Restriction
NA
(3) Tidal Marsh Stream Stability
NA
(4) Tidal Marsh Channel Stability
NA
(4) Tidal Marsh Stream Geomorphology
NA
(3) Tidal Marsh In -stream Habitat
NA
(2) Intertidal Zone
NA
Overall
LOW

Applied Fluvial Geomorphology Day 2: Field Day
SURVEY DATA CROW — 10NOTIYON .1
SITE: Date:( ,,
Location:
Part y / Notes: HUC:
Distance,
Point, or
STATION
Back -Sight
B S
Height of
Instrument
H I
Fore -Sight
F S
Elevation
REMARKS
COMMENTS
[NOILb
Item
I ft
I ft
ft
ft
ft
2
3
4
5
6
7
8
9
10
12
13
zi
14
15
16
17
18
19
20
21
22
23
24
25
26
27
a �A'
128
i
T
A22 Copyright 0 2015 Wildland Hydrology

Applied Fluvial Geomorphology
Day 2: Field Day
SURVEY DATA (OR(ass - SECTYUN 2
Date: SITE: h
STATION
B 8
H I
FS
�Elevation
I [ —NC� �i ��:FC COMMENTS I lu"11111EI 1 1:� REMARKS
Item ft
ft
ft
ft
I ft
29
30
31
32
33
34
35
36
37
38
39
40
41
42
J
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
Copyright @ 2015 Wildland Hydrology A23

a
Project: (i ,
Wolman h -able Count
Site: ., F _ Date 1-
Habitat Type (circle): ClIiffle Pool
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
very fine sand
0.062 - 0.125
Sand
fine sand
0.125 - 0.25
medium sand
0.25 - 0.5
coarse sand
0.5 - 1
very coarse sand
1 - 2
very fine gravel
2 - 4
Gravel
fine gravel
4 - 6
- 1,
fine gravel
6 - 8
'
medium gravel
8 - 11
'
medium gravel
11 - 16
coarse gravel
16 - 22
coarse gravel
22 - 32
)
very coarse gravel
32 - 45
` , 111,11 k 1 ' ` � '. �
i
Z-. �
very coarse gravel
45 - 64
2
small cobble
64 - 90
Cobble
I r
medium cobble
90 - 128
A
large cobble
128 - 180
_.
very large cobble
180 - 256
small boulder
256 - 362
Boulder
small boulder
362 - 512
medium boulder
512 - 1024
large boulder
1024 - 2048
very large boulder
2048 - 4096
bedrock
°{
clay hardpan
detritus/wood
artificial
{
Total
loc,

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5.19 with BEHI variables to determine BEHI score.
Stream: (;b �,-, 0/ Location: �a
Station: Observers: S
Date: Stream Type �.'�% Valley Type:
BEHI Score
Studv Bank Height / Bankfull Height ( C) (Fig. 5-19)
Study
Bankfull
Bank
Height
a>
(A) / (B )_
Hei ht (ft) _
(A)
(ft) _
- r B
(C)
Root Depth / Studv Bank Height ( E )
Root
Study
Depth
`..
Bank
3,b
(D)/(A)=
ft =
4
(D)
Hei ht (ft) =
(A)
(E)
Weighted Root Density ( G )
Root
Density ;� 0 � f) x (E)
F (G)
as % _
Bank Material Adjustment:
----------------------T--------------------------------------
Bedrock (Overall Very Low BEHI)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Sand (Add 10 points)
Silt/Clay (no adjustment)
Bank Anale ( H )
Bank
Angle`
d 5 . t
as Degrees =
H
Surface Protection ( I )
Surface
Protection
as%
Bank
Stratification Adjustment
Add 5-10 points, depending on I
position of unstable layers in
relation to bankfull stage
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: r ty 4 ({ ( "v' Location:
Station Observers:
Date: ',r `t `t �! t; €!tt Stream Type:`r"'i - Valley Type:
BEHI Score
Study Bank Height ! Bankfull Height ( C) (Fig. 5-19)
Study
Bankfull
Bank.{
Height
Height (ft) =
(A)
(ft) =
B
(C)
Root Degth I Stuciv t5anK Hefgnt ( t ►
Root
Study
Depth
Bank
,5
(D)/(A)=
(,00
.0
ft =L
(D)
Hei ht (ft) =
(A)
(E)
Weighted Root Density ( G )
Root
Density
q O /
(F) x (E) =
1
as % =
F
(G)
Bank Material Adjustment:
Bedrock (Overall Very Low BEHI) —
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Sand (Add 10 points)
Silt/Clay (no adjustment)
—W_ iTL•7f- EM
Bank
Angle
[
as Degrees =
H
Surface Protection ( I )
Surface
Protection
as % _
(I)
Ba
ent
Stratification Adjustment
Add 5-10 points, depending on I
position of unstable layers in
relation to bankfuli stage ;
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
user mianuai version z.,i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.189180,-80.942046
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S25-4 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 2.56 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 25.00 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ®Perennial flow ❑Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A ��� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ❑Size 1 (< 0.1 miz) ❑Size 2 (0.1 to < 0.5 miz) ®Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 mil)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III ❑IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water - assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not A
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not A
4. Feature Longitudinal Profile - assessment reach metric
❑A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
®B Not A
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
®A < 10% of channel unstable
❑B 10 to 25% of channel unstable
❑C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
❑A ❑A
Little or no evidence of conditions that adversely affect reference interaction
❑B ®B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
®C ❑C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
❑G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
®J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
®A Multiple aquatic macrophytes and aquatic mosses m 0 ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) M m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent g ❑H Low -tide refugia (pools)
vegetation NC ❑I Sand bottom
❑C Multiple snags and logs (including lap trees) r o ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots 0 2 ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate —assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach — whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
❑ ® ❑ ❑ ❑ Bedrock/saprolite
❑ ® ❑ ❑ ❑ Boulder (256 — 4096 mm)
❑ ❑ ® ❑ ❑ Cobble (64 — 256 mm)
❑ ❑ ❑ ® ❑ Gravel (2 — 64 mm)
® ❑ ❑ ❑ ❑ Sand (.062 — 2 mm)
® ❑ ❑ ❑ ❑ Silt/clay (< 0.062 mm)
® ❑ ❑ ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ®Yes ❑No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ❑Adult frogs
❑ ❑Aquatic reptiles
❑ ®Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ❑Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
® ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ❑Damselfly and dragonfly larvae
❑ ®Dipterans
❑ ❑Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ®Other fish
❑ ❑Salamanders/tad poles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
❑A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
®C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
®B ®B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
❑C ❑C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
ON ON
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
❑E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
®C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
❑F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
❑A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
®B Degraded (example: scattered trees)
❑C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB RB
❑A ❑A ❑A ❑A >_ 100 feet wide or extends to the edge of the watershed
❑B ❑B ❑B ❑B From 50 to < 100 feet wide
❑C ❑C ❑C ❑C From 30 to < 50 feet wide
®D ®D ®D ❑D From 10 to < 30 feet wide
❑E ❑E ❑E ®E < 10 feet wide or no trees
20. Buffer Structure — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
®A ❑A Mature forest
❑B ❑B Non -mature woody vegetation or modified vegetation structure
❑C ®C Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D Maintained shrubs
❑E ❑E Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
❑A ❑A Medium to high stem density
®B ❑B Low stem density
❑C ®C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
❑A ❑A The total length of buffer breaks is < 25 percent.
®B ❑B The total length of buffer breaks is between 25 and 50 percent.
❑C ®C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
❑A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
®B ❑B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
❑C ®C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑B 46 to < 67 ❑C 67 to < 79 ❑D 79 to < 230 ❑E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway Date of Assessment 6/29/2023
detention basin
Stream Category Pa3 Assessor Name/Organization
EBS/JK - HDR
Notes of Field Assessment Form (Y/N)
NO
Presence of regulatory considerations (Y/N)
YES
Additional stream information/supplementary measurements included (Y/N)
NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream)
Perennial
USACE/ NCDWR
Function Class Rating Summary
All Streams Intermittent
(1) Hydrology
MEDIUM
(2) Baseflow
HIGH
(2) Flood Flow
MEDIUM
(3) Streamside Area Attenuation
LOW
(4) Floodplain Access
LOW
(4) Wooded Riparian Buffer
LOW
(4) Microtopography
LOW
(3) Stream Stability
HIGH
(4) Channel Stability
HIGH
(4) Sediment Transport
HIGH
(4) Stream Geomorphology
HIGH
(2) Stream/Intertidal Zone Interaction
NA
(2) Longitudinal Tidal Flow
NA
(2) Tidal Marsh Stream Stability
NA
(3) Tidal Marsh Channel Stability
NA
(3) Tidal Marsh Stream Geomorphology
NA
(1) Water Quality
MEDIUM
(2) Baseflow
HIGH
(2) Streamside Area Vegetation
LOW
(3) Upland Pollutant Filtration
LOW
(3) Thermoregulation
MEDIUM
(2) Indicators of Stressors
NO
(2) Aquatic Life Tolerance
MEDIUM
(2) Intertidal Zone Filtration
NA
(1) Habitat
MEDIUM
(2) In -stream Habitat
HIGH
(3) Baseflow
HIGH
(3) Substrate
HIGH
(3) Stream Stability
HIGH
(3) In -stream Habitat
HIGH
(2) Stream -side Habitat
LOW
(3) Stream -side Habitat
LOW
(3) Thermoregulation
MEDIUM
(2) Tidal Marsh In -stream Habitat
NA
(3) Flow Restriction
NA
(3) Tidal Marsh Stream Stability
NA
(4) Tidal Marsh Channel Stability
NA
(4) Tidal Marsh Stream Geomorphology
NA
(3) Tidal Marsh In -stream Habitat
NA
(2) Intertidal Zone
NA
Overall
MEDIUM

Applied Fluvial Geomorphology Day 2: Field Day
SURVEY DATA
SITE;Date:t,,,
Location:
Part / Notes: HUC:_T__~—�`
Distance,
Point, or
STATION
Back -Sight
B S
Height of
Instrument
H I
Fore -Sight
F S
Elevation
REMARKS
COMMENTS
NOTES
Item
ft
ft
ft
ft
ft
..
3
2_
► ._. .
E
4
5
: _
L
6
t
€
8
9
10
11
IF
12
14
15
16
i ,,_
S
17
a
LA
18
19
ii
20
21
22
23
24
25
26
27
28
A22 Copyright 0 2015 Wildland Hydrology

Wolman m <...able Count
Project: ' Site: — I Date: ,.I Habitat Type (circle): Rime Pool
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
very fine sand
0.062 - 0.125
Sand
fine sand
0.125 - 0.25
medium sand
0.25 - 0.5
coarse sand
0.5 - 1"
very coarse sand
1 - 2
very fine gravel
2 - 4
Gravel
fine gravel
4 - 6
fine gravel
6 - 8
medium gravel
8 - 11
o
medium gravel
11 - 16
coarse gravel
16 - 22
coarse gravel
22 - 32
;
very coarse gravel
32 - 45
very coarse gravel
45 - 64
small cobble
64 - 90
Cobble
medium cobble
90 - 128
large cobble
128 - 180
very large cobble
180 - 256
small boulder
256 - 362
Boulder
small boulder
362 - 512
medium boulder
512 - 1024
large boulder
1024 - 2048
very large boulder
2048 - 4096
bedrock
clay hardpan
j
detritus/wood
�7
t
artificial
Total

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: —�� t h �t n C t) (-G ', (v ,'<' Location: (-9
Station: -%% Observers:
Date:l. 2 !^. Stream Type: Valley Type:
4 !
BEHI Score
Studv Bank Height / Bankfull Height ( C } (Fig. 5-19)
Study
Bankfull
Bank
t VO
Height
�)�
(A) / (B)
S .�
C
eJ
Height (it) =
(A )
(it) =
B
( )
Root Depth / Studv Bank Heiclht ( E )
Root
Study
Depth
(,
Bank
! r
(D) / (A) _'
2
l -�2
ft) _
(D)
Height (ft) =
(A)
(E)
Weighted Root Densitv ( (3 )
Root
Density �� �� (F)x(E)
as /o = F (G)
Bank Angle ( H )
Bank
Angle
( a
ro
as Re es =
H
Surface Protection ( I }
Surface
Protection L+0� c ��
as% _ (I)
Bank Material Adjustment: I
-------------- ---------------------------------------------------------
Bedrock (Overall Very Low BEHI) —r Bank Material
Boulders (overall Low BEHI) ______ ___ -
__A_d�UStment
Cobble (Subtract 10 points if uniform medium to large cobble) - -
Gr, el or Composite Matrix (Add 5-10 points depending on Stratification Adjustment
"percentage of bank material Thal Is composed of sand) Add 5--i0 points, depending an
Sand (Add 10 points) position of unstable layers In
Silt/Clay (no adjustment) relation to bankfull stage
Very Low Low Moderate I High I Very High I Extreme Adjective Rating
and
5 - 9.5 1 10 -19.5 1 20 - 29.5 1 30 - 39.5 1 40 - 45 1 46 - 50 Total Score
Bank Sketch l
12
11
10
V 9
0 1 2 3 4
Horizontal distance (ft)
5 6
--
Root
aYff S opth (D)
Y f(�
Z ¢ .q l
m r i Bank
o Angle
S" )
Bankfull-
-------------- - - - - -- -- Lp� ,
O
J m
'51
Start
::} of
.'`- .., . .,......... ., Bank
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score,
Stream; `(��i'� ��� 'r,�1�� (`j7- Location:
Station: Observers,
Date: �° i` 2//,) 7•, Stream Type: Valley Type:
BEHI Score
Studv Bank Height / Bankfull Heictht ( C) (Fig. 5-19)
Study
Bankfull
Bank
@
"l t
Height
( t
(A) / ( B) _
E J
Hei ht (it)=
(A)
((t) =
B
(C)
Root Depth / Studv Bank Heiaht ( E )
Root
Depth
00
Study
Bank
7 L
(D) / (A) =
O t 52-
tt =
(C)
Height(fo=
(A)
(E).
Weicthted Root Density ( G )
Root
Density
-._
0,U�
(F)x(E)
as % =
F
()
Bank Material Adjustment:
-----------------------------------------------------------------------
Bedrock (Overall Very Low BEN)
Boulders (Overall Low BEHI) i
Cobble (Subtract 10 points If uniform medium to large cobble)
,ravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that Is composed of sand)
Sapd. dd 10 points)
SIltICiay (no adjustment)
ery Low Low Moderate High Very HIgh_J Extreme
5-9.5 110-19.5 1 20-29.5 1 30-39.5 I 40-45 46-50
Bank Sketch
12
11
10
9
v 8
U
w 7
b
s
5
C 4
3
2
1
0
0 1 2 3 4 5 6
Horizontal distance (ft)
Dank knale ( H )
Bank
Angle
_
as Degrees =
H
Surface Protection ( I )
Surface /
Protection
D
as%
Bank Material
Adjustment = -
.----------------- - --- 1
Stratification Adjustment
Add 5-10 points, depending on
position of unstable layers In
relation to bankfuli Stage
Adjective Rating (;
and--w2S;s-I
Total Score
Root
opih(D)
Y
c .� • Bank
>- Angle
F
Bankfull
_-_1f —
f Yt - ---_-�-- _ -. �� c
O
Start
of
Bank
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
Accompanies user manuai version z.-i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.191835,-80.945771
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S32-1 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 1.8 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 7.5 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ❑Perennial flow ®Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A \1� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ®Size 1 (< 0.1 mil) ❑Size 2 (0.1 to < 0.5 mil) ❑Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 miz)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III [:]IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water- assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not
4. Feature Longitudinal Profile - assessment reach metric
❑A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
®B Not
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
❑A < 10% of channel unstable
®B 10 to 25% of channel unstable
❑C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
®A ®A
Little or no evidence of conditions that adversely affect reference interaction
❑B ❑B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
❑C ❑C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
❑G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
®J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
❑A Multiple aquatic macrophytes and aquatic mosses N ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent o w ❑H Low -tide refugia (pools)
vegetation YC ❑I Sand bottom
®C Multiple snags and logs (including lap trees) r @ ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate — assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1 la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach —whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
® ❑ ❑ ❑ ❑ Bedrock/saprolite
® ❑ ❑ ❑ ❑ Boulder (256 — 4096 mm)
❑ ® ❑ ❑ ❑ Cobble (64 — 256 mm)
❑ ❑ ❑ ® ❑ Gravel (2 — 64 mm)
❑ ❑ ® ❑ ❑ Sand (.062 — 2 mm)
❑ ❑ ® ❑ ❑ Silt/clay (< 0.062 mm)
❑ ® ❑ ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ❑Yes ®No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ❑Adult frogs
❑ ❑Aquatic reptiles
❑ ❑Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ❑Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
❑ ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ❑Damselfly and dragonfly larvae
❑ ❑Dipterans
❑ ❑Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ❑Other fish
❑ ❑Salamanders/tadpoles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
®A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
❑C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
®B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
❑C ®C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
CAN ®N
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
❑E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
❑C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
®F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
®A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
❑B Degraded (example: scattered trees)
❑C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB
RB
❑A ❑A ❑A
❑A >_ 100 feet wide or extends to the edge of the watershed
®B ❑B ®B
❑B From 50 to < 100 feet wide
❑C ®C ❑C
❑C From 30 to < 50 feet wide
❑D ❑D ❑D
®D From 10 to < 30 feet wide
❑E ❑E ❑E
❑E < 10 feet wide or no trees
20. Buffer Structure —
streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
®A ❑A
Mature forest
❑B ®B
Non -mature woody vegetation or modified vegetation structure
❑C ❑C
Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D
Maintained shrubs
❑E ❑E
Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
®A ®A Medium to high stem density
❑B ❑B Low stem density
❑C ❑C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
®A ®A The total length of buffer breaks is < 25 percent.
❑B ❑B The total length of buffer breaks is between 25 and 50 percent.
❑C ❑C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
®A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
❑B ®B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
❑C ❑C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑ B 46 to < 67 ❑ C 67 to < 79 ❑ D 79 to < 230 ❑ E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway
detention basin
Stream Category Pal
Date of Assessment 6/29/2023
Assessor Name/Organization EBS/JK - HDR
Notes of Field Assessment Form (Y/N) NO
Presence of regulatory considerations (Y/N) YES
Additional stream information/supplementary measurements included (Y/N) NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream) Intermittent
USACE/
NCDWR
Function Class Rating Summary
All Streams
Intermittent
(1) Hydrology
HIGH
HIGH
(2) Baseflow
HIGH
HIGH
(2) Flood Flow
HIGH
HIGH
(3) Streamside Area Attenuation
HIGH
HIGH
(4) Floodplain Access
HIGH
HIGH
(4) Wooded Riparian Buffer
MEDIUM
MEDIUM
(4) Microtopography
MEDIUM
MEDIUM
(3) Stream Stability
MEDIUM
MEDIUM
(4) Channel Stability
MEDIUM
MEDIUM
(4) Sediment Transport
MEDIUM
MEDIUM
(4) Stream Geomorphology
HIGH
HIGH
(2) Stream/Intertidal Zone Interaction
NA
NA
(2) Longitudinal Tidal Flow
NA
NA
(2) Tidal Marsh Stream Stability
NA
NA
(3) Tidal Marsh Channel Stability
NA
NA
(3) Tidal Marsh Stream Geomorphology
NA
NA
(1) Water Quality
MEDIUM
MEDIUM
(2) Baseflow
HIGH
HIGH
(2) Streamside Area Vegetation
HIGH
HIGH
(3) Upland Pollutant Filtration
HIGH
HIGH
(3) Thermoregulation
HIGH
HIGH
(2) Indicators of Stressors
NO
NO
(2) Aquatic Life Tolerance
LOW
NA
(2) Intertidal Zone Filtration
NA
NA
(1) Habitat
HIGH
HIGH
(2) In -stream Habitat
HIGH
HIGH
(3) Baseflow
HIGH
HIGH
(3) Substrate
MEDIUM
MEDIUM
(3) Stream Stability
MEDIUM
MEDIUM
(3) In -stream Habitat
HIGH
HIGH
(2) Stream -side Habitat
HIGH
HIGH
(3) Stream -side Habitat
HIGH
HIGH
(3) Thermoregulation
HIGH
HIGH
(2) Tidal Marsh In -stream Habitat
NA
NA
(3) Flow Restriction
NA
NA
(3) Tidal Marsh Stream Stability
NA
NA
(4) Tidal Marsh Channel Stability
NA
NA
(4) Tidal Marsh Stream Geomorphology
NA
NA
(3) Tidal Marsh In -stream Habitat
NA
NA
(2) Intertidal Zone
NA
NA
Overall
HIGH
HIGH

Applied Fluvial Geomorphology Day 2: Field Day
SURVEY DATA
SITE: .. ; < r Date: '� I
Location:
Part / Notes: HUC:__�__ L
Distance,
Point, or
STATION
Back -Sight
B S
Height of
Instrument
H I
Fore -Sight
F S
Elevation
REMARKS
COMMENTS
NOTES
Item
ft
ft
ft
ft
ft
2
3
4
5
'
6
t�
7
4
LY,f.
8
9
-
10
12
13
14
15
i
16
17
18
19
20
21
22
23
24
25
26
27
28
A22 Copyright 0 2015 Wildland Hydrology

A Wolman , able Count =�
Project: , ` S t,- "' Site: x.; F' Date `" Habitat Type (circle): Riffle Pool
a
Particle
Millimeters
Size Class
Dot Count
Total
silt/clay
0 - 0.062
Silt/clay
VS\G
very fine sand
0.062 - 0.125
Sand
fine sand
0.125 - 0.25
medium sand
0.25 - 0.5
coarse sand
0.5 - 1
very coarse sand
1 - 2
very fine gravel
2 - 4'
Gravel
fine gravel
4 - 6'�
fine gravel
6 - 8
medium gravel
8 - 11
medium gravel
11 -16
coarse gravel
16 - 22
coarse gravel
22 - 32
very coarse gravel
32 - 45
lid' s
very coarse gravel
45 - 64
L
small cobble
64 - 90
Cobble
medium cobble
90 - 128
large cobble
128 - 180
very large cobble
180 - 256
small boulder
256 - 362
Boulder
small boulder
362 - 512
medium boulder
512 - 1024
large boulder
1024 - 2048
very large boulder
2048 - 4096
bedrock
clay hardpan
detritus/wood
artificial
Total
t
1

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream:rit'z`z�
Location:
Station: �'' - 2 Observers:
Date: (,� Z v," Stream Type: Valley Type:
BEHI Score
Study Bank Height / Bankfull Height ( C) (Fig. 5-19)
Study
Bankfull
Bank
` t
Height
/
(A) / (B) _
2.3
I
Height yt) _
(A)
(tt) =
B
Root Depth / Study Bank Helalit ( L )
Root
Study
Depth
2-S
Sank
I`y
(D)/(A)_
(),(.gq
t {
� (D)
Height(it)=
(A)
A
Weighted Root Density ( G )
Root
Density
'go �.
(F)x(E)
I(�)
as % =
F
Bank Material Adjustment:
Bedrock (hverall Very Low BEHI) �
Boulders (overall Low BEHI)
Gobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that Is composed of sand)
Sand (Add 10 points)
Slit/Clay (no adjustment)
Bank Angle ( H )
Bank
Angie
�`
as Degrees =
H'
Surface Protection ( I )
Surface
Protection
as% (t)
Bank Material
Adjustmen G,
Stratification Adjustment
Add 5-10 points, depending on
position of unstable layers In + -
relation to bankfull stage
Root
oplh (D)
J Bank
Angle
SH)
�v
�o
a
Start
of
Bank
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: `'r 4 ( F Location:
Station ;'�, Observers:
Date: 'irt '•t..r, Stream Type: Valley Type:
BEHI Score
Studv Bank Heiciht / Bankfull Hei_aht ( C } (Fig. 5-19)
Study
Bankfull
Bank
{
Height
(A) / (B) _
I L)
Hei ht (a) =
' (A)
(it) =
B
(C)
Root Denth / Studv Bank Heicfht ( E )
Root
Study
Depth(ft)
I U
(D) / (A) =
l ? ? s�E)
_
(p)
HeB ittl(tt) _
(A)
VVeicdhted Root Densitv ( (3 )
Root
Density
F)x(E) =
�•
�Jo,q
),`�'
as % =
F
(G)
Bank Material Adjustment:
------------------------------------------------------------------------
Bedrock (Overall Very Low BEIII)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material Ihat is composed of sand)
Sand (Add to points)
Silt/Clay (no adjustment)
Very Low Low Moderate High Very High I Extreme
f 5-9.6 1 10-19.51 20-29.5 1 30-39.51 40-45 46-50
Bank Sketch
Bank Angle (H )
Bank
Angle ?
.c19.
as Degrees H
Surface Protection ( I )
Surface
Protection
(l)
as % _
Bank Material
---------- - ---Adjustment
- - 1
Stratification Adjustment t�
Add 5-10 points, depending on
position of unsfabie layers in
relation to bankfull stage
Adjective Rating
and
Total Score I %(Sy
- -
12 Roo,
th
10
9 - m ;f% Bank
> Angle
z H)
— '' _ Bankfull
s -- -- -- __ -__
- m � Z
m 5 �- v _13
4— Y rn
tE -
:•.
„
to 2
2 :.,,..•.......,..
"iStart
0 Bank
0 1 2 3 4 5 6
n Horizontal dista ce ft
Copyright © 2006 Wiidland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
Accompanies user manuai version z.-i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.191895,-80.945217
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S32-2 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 1.8 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 10.5 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ❑Perennial flow ®Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A \1� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ®Size 1 (< 0.1 mil) ❑Size 2 (0.1 to < 0.5 mil) ❑Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 miz)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III [:]IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water- assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not
4. Feature Longitudinal Profile - assessment reach metric
❑A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
®B Not
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
®A < 10% of channel unstable
❑B 10 to 25% of channel unstable
❑C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
®A ®A
Little or no evidence of conditions that adversely affect reference interaction
❑B ❑B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
❑C ❑C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
❑G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
®J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
®A Multiple aquatic macrophytes and aquatic mosses N ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent o w ❑H Low -tide refugia (pools)
vegetation YC ❑I Sand bottom
❑C Multiple snags and logs (including lap trees) r @ ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate — assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1 la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach —whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
® ❑ ❑ ❑ ❑ Bedrock/saprolite
® ❑ ❑ ❑ ❑ Boulder (256 — 4096 mm)
❑ ❑ ® ❑ ❑ Cobble (64 — 256 mm)
❑ ❑ ❑ ❑ ® Gravel (2 — 64 mm)
❑ ® ❑ ❑ ❑ Sand (.062 — 2 mm)
❑ ® ❑ ❑ ❑ Silt/clay (< 0.062 mm)
❑ ® ❑ ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ®Yes ❑No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ❑Adult frogs
❑ ❑Aquatic reptiles
❑ ®Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ❑Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
® ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ❑Damselfly and dragonfly larvae
❑ ❑Dipterans
❑ ❑Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ❑Other fish
❑ ❑Salamanders/tadpoles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
®A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
❑C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
❑B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
®C ®C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
CAN ®N
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
❑E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
❑C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
®F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
❑A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
®B Degraded (example: scattered trees)
❑C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB
RB
❑A ❑A ❑A
❑A >_ 100 feet wide or extends to the edge of the watershed
®B ❑B ®B
❑B From 50 to < 100 feet wide
❑C ❑C ❑C
❑C From 30 to < 50 feet wide
❑D ®D ❑D
❑D From 10 to < 30 feet wide
❑E ❑E ❑E
®E < 10 feet wide or no trees
20. Buffer Structure —
streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
®A ❑A
Mature forest
❑B ❑B
Non -mature woody vegetation or modified vegetation structure
❑C ®C
Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D
Maintained shrubs
❑E ❑E
Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
®A ❑A Medium to high stem density
❑B ❑B Low stem density
❑C ®C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
®A ❑A The total length of buffer breaks is < 25 percent.
❑B ®B The total length of buffer breaks is between 25 and 50 percent.
❑C ❑C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
❑A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
®B ❑B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
❑C ®C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑ B 46 to < 67 ❑ C 67 to < 79 ❑ D 79 to < 230 ❑ E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway Date of Assessment
6/29/2023
detention basin
Stream Category Pal Assessor Name/Organization EBS/JK - HDR
Notes of Field Assessment Form (Y/N)
NO
Presence of regulatory considerations (Y/N)
YES
Additional stream information/supplementary measurements included (Y/N)
NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream)
Intermittent
USACE/
NCDWR
Function Class Rating Summary
All Streams
Intermittent
(1) Hydrology
HIGH
HIGH
(2) Baseflow
HIGH
HIGH
(2) Flood Flow
HIGH
HIGH
(3) Streamside Area Attenuation
HIGH
HIGH
(4) Floodplain Access
HIGH
HIGH
(4) Wooded Riparian Buffer
MEDIUM
MEDIUM
(4) Microtopography
MEDIUM
MEDIUM
(3) Stream Stability
HIGH
HIGH
(4) Channel Stability
HIGH
HIGH
(4) Sediment Transport
HIGH
HIGH
(4) Stream Geomorphology
HIGH
HIGH
(2) Stream/Intertidal Zone Interaction
NA
NA
(2) Longitudinal Tidal Flow
NA
NA
(2) Tidal Marsh Stream Stability
NA
NA
(3) Tidal Marsh Channel Stability
NA
NA
(3) Tidal Marsh Stream Geomorphology
NA
NA
(1) Water Quality
LOW
LOW
(2) Baseflow
HIGH
HIGH
(2) Streamside Area Vegetation
MEDIUM
MEDIUM
(3) Upland Pollutant Filtration
MEDIUM
MEDIUM
(3) Thermoregulation
MEDIUM
MEDIUM
(2) Indicators of Stressors
NO
NO
(2) Aquatic Life Tolerance
LOW
NA
(2) Intertidal Zone Filtration
NA
NA
(1) Habitat
HIGH
HIGH
(2) In -stream Habitat
HIGH
HIGH
(3) Baseflow
HIGH
HIGH
(3) Substrate
HIGH
HIGH
(3) Stream Stability
HIGH
HIGH
(3) In -stream Habitat
HIGH
HIGH
(2) Stream -side Habitat
MEDIUM
MEDIUM
(3) Stream -side Habitat
MEDIUM
MEDIUM
(3) Thermoregulation
MEDIUM
MEDIUM
(2) Tidal Marsh In -stream Habitat
NA
NA
(3) Flow Restriction
NA
NA
(3) Tidal Marsh Stream Stability
NA
NA
(4) Tidal Marsh Channel Stability
NA
NA
(4) Tidal Marsh Stream Geomorphology
NA
NA
(3) Tidal Marsh In -stream Habitat
NA
NA
(2) Intertidal Zone
NA
NA
Overall
HIGH
HIGH

Applied Fluvial Geomorphology Day2: Field Day
SURVEY DATA CROW —10ECC TYON X
SITE. CIS > t_ Date: f �r
Location:
Part / Notes: HUC:
Distance,
Point, or
STATION
Back -Sight
B S
Height of
Instrument
H I
Fore -Sight
F S
Elevation
REMARKS
COMMENTS �--
NOTES
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A22 Copyright © 2015 Wildland Hydrology

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Worksheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-19 with BEHI variables to determine BEHI score.
Stream: Location:
Station: Observers:
Date. Stream Type: Valley Type:
BEHI Score
Studv Bank Height / Bankfull Height ( C ) (Fig. 5-19)
Study
Bankfull
Bank
c` A
Height
() < 3
(A) / (B)
Ell
Hei ht (ft) =
(A)
(ft) _
B
C)
Root Depth / Studv Bank Height ( E )
Root
Study
Depth},
Bank1
;
I
( D) (A)
ft =
(D)
Height (ft) _
(A)
(�)
Weighted Root Density ( G )
Root $
Density- Y� (F)x(E)
as /o — F G
Bank Material Adjustment:
---------------------------------------------------------------
Bedrock (Overall Very Low BEHI)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Sand (Add 10 points)
Silt/Clay,(no adjustment)
13anK Angle ( H )
Bank
Angle
as Degrees =
H
Surface Protection ( I
Surface
Protection
as% =
(I)
Bank Material
Stratification Adjustment I
Add 5-10 points, depending on i
position of unstable layers in I //
relation to bankfull stage ;
Copyright © 2006 Wildland Hydrology WiARSSS page 5-56

Work -sheet 5-8. Form to calculate Bank Erosion Hazard Index (BEHI) variables and an overall BEHI rating
(Rosgen, 1996, 2001a). Use Figure 5-ig with BEHI variables to determine BEHI score.
Stream: ; �,' ` Location:
Station: S �� — f �',, j Observers:
Date: �n '� 1 ' 1 ' '!J Stream Type: tom, f Vallev Tvpe:
BEHI Score
Studv Bank Height / Bankfull Height ( C) (Fig. 5-19)
Study
Bankfull
Bank
�'�
Height
O t:
(A) / (B) _
1 t� �
Hei ht (ft) =
(A)
(ft) =
B
(C)
Root Depth / Studv Bank Height ( E )
Root
Study
Depth
1
J
Bank
0
(®) / (�)
ft =
(D)
Hei ht (ft) =
(A)
(E)
Weighted Root Density ( G )
Root
Density �':1; (F)x(E) = 1'`11
as % = F (G)
Bank Material Adjustment:
Bedrock (Overall Very Low BEHI)
Boulders (Overall Low BEHI)
Cobble (Subtract 10 points if uniform medium to large cobble)
Gravel or Composite Matrix (Add 5-10 points depending on
percentage of bank material that is composed of sand)
Salnd.(Add 10 points)
'§ilt/Clay (r o adjustment)
Bank Angle ( H )
Bank
Angler
4
as Degrees = H
Surface Protection ( I )
Surface
Protection
� (�/
/ E
1
as% _
(l)
•------------------Adjustment
Stratification Adjustment
Add 5-10 points, depending on I
position of unstable layers in i
relation to bankfull stage
Copyright © 2006 Wildland Hydrology WARSSS page 5-56

NC SAM FIELD ASSESSMENT FORM
Accompanies user manuai version z.-i
USACE AID #: NCDWR #:
INSTRUCTIONS: Attach a sketch of the assessment area and photographs. Attach a copy of the USGS 7.5-minute topographic quadrangle,
and circle the location of the stream reach under evaluation. If multiple stream reaches will be evaluated on the same property, identify and
number all reaches on the attached map, and include a separate form for each reach. See the NC SAM User Manual for detailed descriptions
and explanations of requested information. Record in the "Notes/Sketch" section if supplementary measurements were performed. See the
NC SAM User Manual for examples of additional measurements that may be relevant.
NOTE EVIDENCE OF STRESSORS AFFECTING THE ASSESSMENT AREA (do not need to be within the assessment area).
PROJECT/SITE INFORMATION:
South Cross Field Taxiway detention
1. Project name (if any): basin 2. Date of evaluation: 6/29/2023
Charlotte Douglas International
3. Applicant/owner name: Airport 4. Assessor name/organization: EBS/JK - HDR
5. County: Mecklenburg 6. Nearest named water body
7. River basin: Catawba on USGS 7.5-minute quad: Coffey Creek
8. Site coordinates (decimal degrees, at lower end of assessment reach): 35.191758,-80.942089
STREAM INFORMATION: (depth and width can be approximations)
9. Site number (show on attached map): S34-1 10. Length of assessment reach evaluated (feet): 20
11. Channel depth from bed (in riffle, if present) to top of bank (feet): 0.4 ❑Unable to assess channel depth.
12. Channel width at top of bank (feet): 2.2 13. Is assessment reach a swamp steam? ❑Yes ❑No
14. Feature type: ❑Perennial flow ®Intermittent flow ❑Tidal Marsh Stream
STREAM CATEGORY INFORMATION:
15. NC SAM Zone: ❑ Mountains (M) ® Piedmont (P) ❑ Inner Coastal Plain (1) ❑ Outer Coastal Plain (0)
16. Estimated geomorphic ®A \1� ❑B
valley shape (skip for
Tidal Marsh Stream): (more sinuous stream, flatter valley slope) (less sinuous stream, steeper valley slope)
17. Watershed size: (skip ®Size 1 (< 0.1 mil) ❑Size 2 (0.1 to < 0.5 mil) ❑Size 3 (0.5 to < 5 mil) ❑Size 4 (>_ 5 miz)
for Tidal Marsh Stream)
ADDITIONAL INFORMATION:
18. Were regulatory considerations evaluated? ®Yes ❑No If Yes, check all that apply to the assessment area.
❑Section 10 water ❑Classified Trout Waters ❑Water Supply Watershed (❑I ❑II ❑III [:]IV ❑V)
❑Essential Fish Habitat ❑Primary Nursery Area ❑ High Quality Waters/Outstanding Resource Waters
❑Publicly owned property ®NCDWR Riparian buffer rule in effect ❑Nutrient Sensitive Waters
❑Anadromous fish ❑303(d) List ❑CAMA Area of Environmental Concern (AEC)
❑Documented presence of a federal and/or state listed protected species within the assessment area.
List species:
❑Designated Critical Habitat (list species)
19. Are additional stream information/supplementary measurements included in "Notes/Sketch" section or attached? ❑Yes ®No
1. Channel Water- assessment reach metric (skip for Size 1 streams and Tidal Marsh Streams)
®A Water throughout assessment reach.
❑B No flow, water in pools only.
❑C No water in assessment reach.
2. Evidence of Flow Restriction - assessment reach metric
❑A At least 10% of assessment reach in -stream habitat or riffle -pool sequence is severely affected by a flow restriction or fill to the
point of obstructing flow or a channel choked with aquatic macrophytes or ponded water or impoundment on flood or ebb within
the assessment reach (examples: undersized or perched culverts, causeways that constrict the channel, tidal gates, debris jams,
beaver dams).
®B Not
3. Feature Pattern - assessment reach metric
❑A A majority of the assessment reach has altered pattern (examples: straightening, modification above or below culvert).
®B Not
4. Feature Longitudinal Profile - assessment reach metric
❑A Majority of assessment reach has a substantially altered stream profile (examples: channel down -cutting, existing damming, over
widening, active aggradation, dredging, and excavation where appropriate channel profile has not reformed from any of these
disturbances).
®B Not
5. Signs of Active Instability - assessment reach metric
Consider only current instability, not past events from which the stream has currently recovered. Examples of instability include
active bank failure, active channel down -cutting (head -cut), active widening, and artificial hardening (such as concrete, gabion, rip -rap).
®A < 10% of channel unstable
❑B 10 to 25% of channel unstable
❑C > 25% of channel unstable

6. Streamside Area Interaction — streamside area metric
Consider for the Left Bank (LB) and the Right Bank (RB).
LB RB
®A ®A
Little or no evidence of conditions that adversely affect reference interaction
❑B ❑B
Moderate evidence of conditions (examples: berms, levees, down -cutting, aggradation, dredging) that adversely affect
reference interaction (examples: limited streamside area access, disruption of flood flows through streamside area, leaky
or intermittent bulkheads, causeways with floodplain constriction, minor ditching [including mosquito ditching])
❑C ❑C
Extensive evidence of conditions that adversely affect reference interaction (little to no floodplain/intertidal zone access
[examples: causeways with floodplain and channel constriction, bulkheads, retaining walls, fill, stream incision, disruption
of flood flows through streamside area] or too much floodplain/intertidal zone access [examples: impoundments, intensive
mosquito ditching]) or floodplain/intertidal zone unnaturally absent or assessment reach is a man-made feature on an
interstream divide
Water Quality Stressors — assessment reach/intertidal zone metric
Check all that apply.
❑A Discolored water in stream or intertidal zone (milky white, blue, unnatural water discoloration, oil sheen, stream foam)
❑B Excessive sedimentation (burying of stream features or intertidal zone)
❑C Noticeable evidence of pollutant discharges entering the assessment reach and causing a water quality problem
❑D Odor (not including natural sulfide odors)
❑E Current published or collected data indicating degraded water quality in the assessment reach. Cite source in "Notes/Sketch"
section.
❑F Livestock with access to stream or intertidal zone
❑G Excessive algae in stream or intertidal zone
❑H Degraded marsh vegetation in the intertidal zone (removal, burning, regular mowing, destruction, etc)
❑I Other: (explain in "Notes/Sketch" section)
®J Little to no stressors
8. Recent Weather — watershed metric (skip for Tidal Marsh Streams)
For Size 1 or 2 streams, D1 drought or higher is considered a drought; for Size 3 or 4 streams, D2 drought or higher is considered a drought.
❑A Drought conditions and no rainfall or rainfall not exceeding 1 inch within the last 48 hours
❑B Drought conditions and rainfall exceeding 1 inch within the last 48 hours
®C No drought conditions
9. Large or Dangerous Stream — assessment reach metric
❑Yes ®No Is stream is too large or dangerous to assess? If Yes, skip to Metric 13 (Streamside Area Ground Surface Condition).
10. Natural In -stream Habitat Types — assessment reach metric
10a. ❑Yes ®No Degraded in -stream habitat over majority of the assessment reach (examples of stressors include excessive
sedimentation, mining, excavation, in -stream hardening [for example, rip -rap], recent dredging, and snagging)
(evaluate for Size 4 Coastal Plain streams only, then skip to Metric 12)
10b. Check all that occur (occurs if > 5% coverage of assessment reach) (skip for Size 4 Coastal Plain streams)
®A Multiple aquatic macrophytes and aquatic mosses N ❑F 5% oysters or other natural hard bottoms
(include liverworts, lichens, and algal mats) m ❑G Submerged aquatic vegetation
®B Multiple sticks and/or leaf packs and/or emergent o w ❑H Low -tide refugia (pools)
vegetation YC ❑I Sand bottom
❑C Multiple snags and logs (including lap trees) r @ ❑J 5% vertical bank along the marsh
®D 5% undercut banks and/or root mats and/or roots ❑K Little or no habitat
in banks extend to the normal wetted perimeter
❑E Little or no habitat
*********************************REMAINING QUESTIONS ARE NOT APPLICABLE FOR TIDAL MARSH STREAMS****************************
11. Bedform and Substrate — assessment reach metric (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)
1 la. ❑Yes ®No Is assessment reach in a natural sand -bed stream? (skip for Coastal Plain streams)
11 b. Bedform evaluated. Check the appropriate box(es).
®A Riffle -run section (evaluate 11c)
❑B Pool -glide section (evaluate 11d)
❑C Natural bedform absent (skip to Metric 12, Aquatic Life)
11 c. In riffle sections, check all that occur below the normal wetted perimeter of the assessment reach —whether or not submerged. Check
at least one box in each row (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams). Not Present (NP) = absent, Rare
(R) = present but < 10%, Common (C) _ > 10-40%, Abundant (A) _ > 40-70%, Predominant (P) _ > 70%. Cumulative percentages
should not exceed 100% for each assessment reach.
NP R C A P
® ❑ ❑ ❑ ❑ Bedrock/saprolite
® ❑ ❑ ❑ ❑ Boulder (256 — 4096 mm)
® ❑ ❑ ❑ ❑ Cobble (64 — 256 mm)
❑ ® ❑ ❑ ❑ Gravel (2 — 64 mm)
❑ ❑ ❑ ® ❑ Sand (.062 — 2 mm)
❑ ❑ ® ❑ ❑ Silt/clay (< 0.062 mm)
❑ ❑ ® ❑ ❑ Detritus
® ❑ ❑ ❑ ❑ Artificial (rip -rap, concrete, etc.)
11d. ❑Yes ❑No Are pools filled with sediment? (skip for Size 4 Coastal Plain streams and Tidal Marsh Streams)

12. Aquatic Life — assessment reach metric (skip for Tidal Marsh Streams)
12a. ®Yes ❑No Was an in -stream aquatic life assessment performed as described in the User Manual?
If No, select one of the following reasons and skip to Metric 13. ❑No Water ❑Other:
12b. ❑Yes ®No Are aquatic organisms present in the assessment reach (look in riffles, pools, then snags)? If Yes, check all that
apply. If No, skip to Metric 13.
1 >1 Numbers over columns refer to "individuals" for Size 1 and 2 streams and "taxa" for Size 3 and 4 streams.
❑ ❑Adult frogs
❑ ❑Aquatic reptiles
❑ ❑Aquatic macrophytes and aquatic mosses (include liverworts, lichens, and algal mats)
❑ ❑Beetles
❑ ❑Caddisfly larvae (T)
❑ ❑Asian clam (Corbicula)
❑ ❑Crustacean (isopod/amphipod/crayfish/shrimp)
❑ ❑Damselfly and dragonfly larvae
❑ ❑Dipterans
❑ ❑Mayfly larvae (E)
❑ ❑Megaloptera (alderfly, fishfly, dobsonfly larvae)
❑ ❑Midges/mosquito larvae
❑ ❑Mosquito fish (Gambusia) or mud minnows (Umbra pygmaea)
❑ ❑Mussels/Clams (not Corbicula)
❑ ❑Other fish
❑ ❑Salamanders/tadpoles
❑ ❑Snails
❑ ❑Stonefly larvae (P)
❑ ❑Tipulid larvae
❑ ❑Worms/leeches
13. Streamside Area Ground Surface Condition — streamside area metric (skip for Tidal Marsh Streams and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB). Consider storage capacity with regard to both overbank flow and upland runoff.
LB RB
®A ❑A Little or no alteration to water storage capacity over a majority of the streamside area
❑B ❑B Moderate alteration to water storage capacity over a majority of the streamside area
❑C ®C Severe alteration to water storage capacity over a majority of the streamside area (examples: ditches, fill, soil compaction,
livestock disturbance, buildings, man-made levees, drainage pipes)
14. Streamside Area Water Storage — streamside area metric (skip for Size 1 streams, Tidal Marsh Streams, and B valley types)
Consider for the Left Bank (LB) and the Right Bank (RB) of the streamside area.
LB RB
❑A ❑A Majority of streamside area with depressions able to pond water >_ 6 inches deep
❑B ❑B Majority of streamside area with depressions able to pond water 3 to 6 inches deep
®C ®C Majority of streamside area with depressions able to pond water < 3 inches deep
15. Wetland Presence — streamside area metric (skip for Tidal Marsh Streams)
Consider for the Left Bank (LB) and the Right Bank (RB). Do not consider wetlands outside of the streamside area or within the normal
wetted perimeter of assessment reach.
LB RB
❑Y ❑Y Are wetlands present in the streamside area?
CAN ®N
16. Baseflow Contributors — assessment reach metric (skip for Size 4 streams and Tidal Marsh Streams)
Check all contributors within the assessment reach or within view of and draining to the assessment reach.
®A Streams and/or springs (jurisdictional discharges)
❑B Ponds (include wet detention basins; do not include sediment basins or dry detention basins)
❑C Obstruction passing flow during low -flow periods within the assessment area (beaver dam, leaky dam, bottom -release dam, weir)
❑D Evidence of bank seepage or sweating (iron in water indicates seepage)
®E Stream bed or bank soil reduced (dig through deposited sediment if present)
❑F None of the above
17. Baseflow Detractors — assessment area metric (skip for Tidal Marsh Streams)
Check all that apply.
❑A Evidence of substantial water withdrawals from the assessment reach (includes areas excavated for pump installation)
❑B Obstruction not passing flow during low -flow periods affecting the assessment reach (ex: watertight dam, sediment deposit)
❑C Urban stream (>_ 24% impervious surface for watershed)
❑D Evidence that the streamside area has been modified resulting in accelerated drainage into the assessment reach
❑E Assessment reach relocated to valley edge
®F None of the above
18. Shading — assessment reach metric (skip for Tidal Marsh Streams)
Consider aspect. Consider "leaf -on" condition.
®A Stream shading is appropriate for stream category (may include gaps associated with natural processes)
❑B Degraded (example: scattered trees)
❑C Stream shading is gone or largely absent

19. Buffer Width — streamside area metric (skip for Tidal Marsh Streams)
Consider "vegetated buffer" and "wooded buffer" separately for left bank (LB) and right bank (RB) starting at the top of bank out
to the first break.
Vegetated Wooded
LB RB LB
RB
❑A ❑A ❑A
❑A >_ 100 feet wide or extends to the edge of the watershed
®B ❑B ®B
❑B From 50 to < 100 feet wide
❑C ❑C ❑C
❑C From 30 to < 50 feet wide
❑D ®D ❑D
®D From 10 to < 30 feet wide
❑E ❑E ❑E
❑E < 10 feet wide or no trees
20. Buffer Structure —
streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Vegetated" Buffer Width).
LB RB
®A ❑A
Mature forest
❑B ❑B
Non -mature woody vegetation or modified vegetation structure
❑C ®C
Herbaceous vegetation with or without a strip of trees < 10 feet wide
❑D ❑D
Maintained shrubs
❑E ❑E
Little or no vegetation
21. Buffer Stressors — streamside area metric (skip for Tidal Marsh Streams)
Check all appropriate boxes for left bank (LB) and right bank (RB). Indicate if listed stressor abuts stream (Abuts), does not abut but is
within 30 feet of stream (< 30 feet), or is between 30 to 50 feet of stream (30-50 feet).
If none of the following stressors occurs on either bank, check here and skip to Metric 22:
Abuts < 30 feet 30-50 feet
LB RB LB RB LB RB
❑A ❑A ❑A ❑A ❑A ❑A Row crops
❑B ❑B ❑B ❑B ❑B ❑B Maintained turf
❑C ❑C ❑C ❑C ❑C ❑C Pasture (no livestock)/commercial horticulture
❑D ❑D ❑D ❑D ❑D ❑D Pasture (active livestock use)
22. Stem Density — streamside area metric (skip for Tidal Marsh Streams)
Consider for left bank (LB) and right bank (RB) for Metric 19 ("Wooded" Buffer Width).
LB RB
®A ®A Medium to high stem density
❑B ❑B Low stem density
❑C ❑C No wooded riparian buffer or predominantly herbaceous species or bare ground
23. Continuity of Vegetated Buffer — streamside area metric (skip for Tidal Marsh Streams)
Consider whether vegetated buffer is continuous along stream (parallel). Breaks are areas lacking vegetation > 10 feet wide.
LB RB
®A ®A The total length of buffer breaks is < 25 percent.
❑B ❑B The total length of buffer breaks is between 25 and 50 percent.
❑C ❑C The total length of buffer breaks is > 50 percent.
24. Vegetative Composition — streamside area metric (skip for Tidal Marsh Streams)
Evaluate the dominant vegetation within 100 feet of each bank or to the edge of the watershed (whichever comes first) as it contributes to
assessment reach habitat.
LB RB
®A ❑A Vegetation is close to undisturbed in species present and their proportions. Lower strata composed of native species,
with non-native invasive species absent or sparse.
❑B ®B Vegetation indicates disturbance in terms of species diversity or proportions, but is still largely composed of native
species. This may include communities of weedy native species that develop after clear -cutting or clearing or
communities with non-native invasive species present, but not dominant, over a large portion of the expected strata or
communities missing understory but retaining canopy trees.
❑C ❑C Vegetation is severely disturbed in terms of species diversity or proportions. Mature canopy is absent or communities
with non-native invasive species dominant over a large portion of expected strata or communities composed of planted
stands of non -characteristic species or communities inappropriately composed of a single species or no vegetation.
25. Conductivity — assessment reach metric (skip for all Coastal Plain streams)
25a. ❑Yes ®No Was conductivity measurement recorded?
If No, select one of the following reasons. ❑No Water ❑Other:
25b. Check the box corresponding to the conductivity measurement (units of microsiemens per centimeter).
❑A < 46 ❑ B 46 to < 67 ❑ C 67 to < 79 ❑ D 79 to < 230 ❑ E >_ 230
Notes/Sketch

Draft NC SAM Stream Rating Sheet
Accompanies User Manual Version 2.1
Stream Site Name South Cross Field Taxiway Date of Assessment
6/29/2023
detention basin
Stream Category Pal Assessor Name/Organization EBS/JK - HDR
Notes of Field Assessment Form (Y/N)
NO
Presence of regulatory considerations (Y/N)
YES
Additional stream information/supplementary measurements included (Y/N)
NO
NC SAM feature type (perennial, intermittent, Tidal Marsh Stream)
Intermittent
USACE/
NCDWR
Function Class Rating Summary
All Streams
Intermittent
(1) Hydrology
HIGH
HIGH
(2) Baseflow
HIGH
HIGH
(2) Flood Flow
HIGH
HIGH
(3) Streamside Area Attenuation
HIGH
HIGH
(4) Floodplain Access
HIGH
HIGH
(4) Wooded Riparian Buffer
MEDIUM
MEDIUM
(4) Microtopography
MEDIUM
MEDIUM
(3) Stream Stability
HIGH
HIGH
(4) Channel Stability
HIGH
HIGH
(4) Sediment Transport
LOW
LOW
(4) Stream Geomorphology
HIGH
HIGH
(2) Stream/Intertidal Zone Interaction
NA
NA
(2) Longitudinal Tidal Flow
NA
NA
(2) Tidal Marsh Stream Stability
NA
NA
(3) Tidal Marsh Channel Stability
NA
NA
(3) Tidal Marsh Stream Geomorphology
NA
NA
(1) Water Quality
LOW
LOW
(2) Baseflow
HIGH
HIGH
(2) Streamside Area Vegetation
MEDIUM
MEDIUM
(3) Upland Pollutant Filtration
MEDIUM
MEDIUM
(3) Thermoregulation
HIGH
HIGH
(2) Indicators of Stressors
NO
NO
(2) Aquatic Life Tolerance
LOW
NA
(2) Intertidal Zone Filtration
NA
NA
(1) Habitat
HIGH
HIGH
(2) In -stream Habitat
MEDIUM
MEDIUM
(3) Baseflow
HIGH
HIGH
(3) Substrate
LOW
LOW
(3) Stream Stability
HIGH
HIGH
(3) In -stream Habitat
HIGH
HIGH
(2) Stream -side Habitat
HIGH
HIGH
(3) Stream -side Habitat
HIGH
HIGH
(3) Thermoregulation
HIGH
HIGH
(2) Tidal Marsh In -stream Habitat
NA
NA
(3) Flow Restriction
NA
NA
(3) Tidal Marsh Stream Stability
NA
NA
(4) Tidal Marsh Channel Stability
NA
NA
(4) Tidal Marsh Stream Geomorphology
NA
NA
(3) Tidal Marsh In -stream Habitat
NA
NA
(2) Intertidal Zone
NA
NA
Overall
HIGH
HIGH

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