20160849 Ver 1_Appendix D_Preconstruction Baseline Monitoring_20160831

Appendix D- Pre -construction Baseline
Monitoring Efforts
Upper Rocky Mitigation Bank Draft Prospectus

Legend
URMB Limits
Stream
Adjacent Streams
O Water Quality Locations
X Cross Section Locations
® Ground Water Well Locations
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s
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WATER & LAND
SOLUTIONS
waterland soIution s.com
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101
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Macro Collection Site 1
A . ' .
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O
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Y
" Macro Collection Site 2J
- M � 2A
Upper Rocky
Mitigation Bank
ti
Feet
0 280 560
• —:
r
Baseline Monitoring FIGURE
Efforts
1=D
NAD 1983 2011 State Plane
North Carolina RIPS 3200 FT US

Cross Section Data
Upper Rocky Mitigation Bank
Pre -Construction Baseline Assessment
Fifteen cross sections were surveyed throughout the proposed Bank. It should be noted that the
existing conditions of on-site streams are considered to be highly unstable. Cross sections were
recorded at representative sections to indicate the unstable and highly incised nature of each reach. In-
field bankfull indicators were very difficult to identify. Therefore, for the purpose of depicting incision
and stream conditions, regional curve relationships for cross sectional area were estimated and depicted
on cross sections. Cross section locations are described in the existing conditions narrative. A Figure
depicting the locations of these cross sections is included in this Appendix. Results of those surveys are
shown in the figures and tables below.

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 1, Reach 1
Riffle
108
106
Flood Dimensions
23.6
XS Area (sq ft)
-
104
Width FPA (ft)
13.8
Width (ft)
102
Entrenchment Ratio
1.7
Mean Depth (ft)
IN
Low Bank Height (ft)
2.5
Max Depth (ft)
Lu 98
Low Bank Height Ratio
15.3
1.5
8.0
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
95
94.5
96
94
93.5
94
0 5 A 15 20 25 30 35 40 45
Width
0 10 20 30 40 50 60 70
Width
Cross Section 2, Reach 2
Riffle
98.5
Bankfull Dimensions
Flood Dimensions
23.6
XS Area (sq ft)
12.3
Width FPA (ft)
13.8
Width (ft)
0.9
Entrenchment Ratio
1.7
Mean Depth (ft)
10.5
Low Bank Height (ft)
2.5
Max Depth (ft)
4.2
Low Bank Height Ratio
15.3
1.5
8.0
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 2, Reach 2
Riffle
98.5
98
Flood Dimensions
5.1
975
8.9
Width FPA (ft)
. --------------- -------------------00
Width (ft)
1.7
97
1.0
Mean Depth (ft)
96.5
96
Low Bank Height (ft)
1.4
95.5
2.6
Low Bank Height Ratio
6.2
0.8
5.2
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
95
94.5
94
93.5
0 5 A 15 20 25 30 35 40 45
Width
Bankfull Dimensions
Flood Dimensions
5.1
X5 Area (sq ft)
8.9
Width FPA (ft)
5.1
Width (ft)
1.7
Entrenchment Ratio
1.0
Mean Depth (ft)
3.6
Low Bank Height (ft)
1.4
Max Depth (ft)
2.6
Low Bank Height Ratio
6.2
0.8
5.2
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 3, Reach 3 (Downstream of 2 major headcuts)
98 Riffle
97 -
96 = - - - --------
95
=94 -
�3
c�
V2
90
89 -
88
-20 -10 0 10 20 30 40 50
Width
Cross Section 4, Reach 3 (Downstream of one major headcut, upstream of one major headcut)
Riffle
100
99
98
C97
X96
a')95
w94
93
92
--------------------------- -- - -------------
-15 -10 -5 0 5 10 15 20 25
Width
Bankfull Dimensions
Flood Dimensions
10.1
XS Area (sq ft)
8.0 Width FPA (ft)
6.1
Width (ft)
1.3 Entrenchment Ratio
1.7
Mean Depth (ft)
6.5 Low Bank Height (ft)
2.1
Max Depth (ft)
3.1 Low Bank Height Ratio
8.5
1.2
3.7
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 4, Reach 3 (Downstream of one major headcut, upstream of one major headcut)
Riffle
100
99
98
C97
X96
a')95
w94
93
92
--------------------------- -- - -------------
-15 -10 -5 0 5 10 15 20 25
Width
3
Bankfull Dimensions
Flood Dimensions
10.0
XS Area (sq ft)
12.9 Width FPA (ft)
5.8
Width (ft)
2.2 Entrenchment Ratio
1.7
Mean Depth (ft)
6.0 Low Bank Height (ft)
3.3
Max Depth (ft)
1.8 Low Bank Height Ratio
9.7
1.0
3.4
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
3

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 5, Reach 3 (Upstream of two major headcuts)
Riffle
101
100.5 -
100 - -
99.5
C99
#.5
>98
W.5
97 - —
96.5
96
-20 -10 0 10 20 30 40 50 60
Width
Cross Section 6. Reach 5
Riffle
96
Bankfull Dimensions
Flood Dimensions
10.1
XS Area (sq ft)
7.1 Width FPA (ft)
5.5
Width (ft)
5.3 Entrenchment Ratio
1.8
Mean Depth (ft)
3.0 Low Bank Height (ft)
2.1
Max Depth (ft)
1.4 Low Bank Height Ratio
11.3
0.7
3.5
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 6. Reach 5
Riffle
96
95
Flood Dimensions
3.3
XS Area (sq ft)
6.9 Width FPA (ft)
94
Width (ft)
1.4 Entrenchment Ratio
0.6
Mean Depth (ft)
93
1.2
Max Depth (ft)
6.4 Low Bank Height Ratio
5.9
0.6
7.9
a
92
'y 91
w
90
89
88
87
a 5 10 15 24 25 30 35 40 45 50
Width
4
Bankfull Dimensions
Flood Dimensions
3.3
XS Area (sq ft)
6.9 Width FPA (ft)
5.1
Width (ft)
1.4 Entrenchment Ratio
0.6
Mean Depth (ft)
7.3 Low Bank Height (ft)
1.2
Max Depth (ft)
6.4 Low Bank Height Ratio
5.9
0.6
7.9
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
4

Cross Section 7, Reach 5
96
95 - -
94
93
.o92
M91 _.
090
89
88
87
0 10 20
Riffle
30 40
Width
Cross Section Data
Upper Rocky Mitigation Bank
50 60
Cross Section 8, Reach 4
Riffle
Bankfull Dimensions
Flood Dimensions
11.0
XS Area (sq ft)
11.7
Width FPA (ft)
7.2
Width (ft)
1.6
Entrenchment Ratio
1.5
Mean Depth (ft)
7.6
Low Bank Height (ft)
2.5
Max Depth (ft)
3.0
Low Bank Height Ratio
9.0
1.2
4.7
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 8, Reach 4
Riffle
99
98
Flood Dimensions
5.2
XS Area (sq ft)
5.9 Width FPA (ft)
5.2
97
1.1 Entrenchment Ratio
1.0
Mean Depth (ft)
6.0 Low Bank Height (ft)
1.2
96
5.0 Low Bank Height Ratio
6.6
0.8
5.2
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
95
94
93
w
92
91
90
—
89
4 5 10 15 20 25 30 35
Width
5
Bankfull Dimensions
Flood Dimensions
5.2
XS Area (sq ft)
5.9 Width FPA (ft)
5.2
Width (ft)
1.1 Entrenchment Ratio
1.0
Mean Depth (ft)
6.0 Low Bank Height (ft)
1.2
Max Depth (ft)
5.0 Low Bank Height Ratio
6.6
0.8
5.2
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
5

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 9, Reach 4
Riffle
97-5
Flood Dimensions
5.0
XS Area (sq ft)
20.0 Width FPA (ft)
6.2
Width (ft)
3.2 Entrenchment Ratio
0.8
Mean Depth (ft)
1.7 Low Bank Height (ft)
97
Max Depth (ft)
1.4 Low Bank Height Ratio
6.8
0.7
7.6
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
96..5
--------- --------- --
---------------- ----------------
c
O
96
y
m
W
95.5
95
94.5
{] 5 10 15 20 25
Width
Cross Section 10, Reach 6
96
95
94
X93
j92
'm91
w90
89
88
1-.4fir-
10 15 20 25 30
Width
Bankfull Dimensions
Flood Dimensions
5.0
XS Area (sq ft)
20.0 Width FPA (ft)
6.2
Width (ft)
3.2 Entrenchment Ratio
0.8
Mean Depth (ft)
1.7 Low Bank Height (ft)
1.2
Max Depth (ft)
1.4 Low Bank Height Ratio
6.8
0.7
7.6
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 10, Reach 6
96
95
94
X93
j92
'm91
w90
89
88
1-.4fir-
10 15 20 25 30
Width
Bankfull Dimensions
Flood Dimensions
6.6
XS Area (sq ft)
23.0 Width FPA (ft)
4.4
Width (ft)
5.3 Entrenchment Ratio
1.5
Mean Depth (ft)
5.1 Low Bank Height (ft)
2.5
Max Depth (ft)
2.0 Low Bank Height Ratio
6.9
1.0
2.9
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 11, Reach 5
Riffle
96
95 ------------ -----------
94
--------- 94
93
092
X91
w90
89
88
87
0 10 20 30 40 50
Width
Cross Section 12. Reach 6
98
97
96
95
94
05_93
-ca92
X91
w90
89
88
87
Riffle
0 10 20 30 40 50
Width
Bankfull Dimensions
Flood Dimensions
10.3
XS Area (sq ft)
10.3 Width FPA (ft)
6.9
Width (ft)
1.5 Entrenchment Ratio
1.5
Mean Depth (ft)
7.3 Low Bank Height (ft)
2.3
Max Depth (ft)
3.2 Low Bank Height Ratio
8.9
1.2
4.7
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
1.6
Cross Section 12. Reach 6
98
97
96
95
94
05_93
-ca92
X91
w90
89
88
87
Riffle
0 10 20 30 40 50
Width
7
Bankfull Dimensions
Flood Dimensions
5.6
XS Area (sq ft)
37.0
Width FPA (ft)
5.6
Width (ft)
6.6
Entrenchment Ratio
1.0
Mean Depth (ft)
6.7
Low Bank Height (ft)
4.3
Max Depth (ft)
1.6
Low Bank Height Ratio
12.1
0.5
5.5
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
7

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 13, Reach 6
Riffle
96.5
96
95.5
c
°95 - CO
@.5
94
93.5
0 5 10 15 20 25 30 35 40
Width
Cross Section 14, Reach 9
Riffle
96
95 ------------- ----- ---------------------- ----- ----
94 .00
93 -
c92
091
>90 j
w89
88
87
86
0 10 20 30 40 50 60
Width
Bankfull Dimensions
Flood Dimensions
8.2
XS Area (sq ft)
36.5 Width FPA (ft)
14.7
Width (ft)
2.5 Entrenchment Ratio
0.6
Mean Depth (ft)
1.2 Low Bank Height (ft)
1.1
Max Depth (ft)
1.1 Low Bank Height Ratio
15.4
0.5
26.3
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
Cross Section 14, Reach 9
Riffle
96
95 ------------- ----- ---------------------- ----- ----
94 .00
93 -
c92
091
>90 j
w89
88
87
86
0 10 20 30 40 50 60
Width
M
Bankfull Dimensions
Flood Dimensions
4.7
XS Area (sq ft)
11.6 Width FPA (ft)
6.7
Width (ft)
1.7 Entrenchment Ratio
0.7
Mean Depth (ft)
8.2 Low Bank Height (ft)
2.1
Max Depth (ft)
4.0 Low Bank Height Ratio
9.4
0.9
6.0
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
M

Cross Section Data
Upper Rocky Mitigation Bank
Cross Section 15, Reach 10
Riffle
96
Bankfull Dimensions
Flood Dimensions
0.9
XS Area (sq ft)
94
1.9
Width (ft)
1.3 Entrenchment Ratio
93
Mean Depth (ft)
5.7 Low Bank Height (ft)
0.6
c
4
92
10.2 Low Bank Height Ratio
2.6
0.3
4.4
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio
v
Lu
91
94
0 2 4 6 8 10 12 14
Width
Bankfull Dimensions
Flood Dimensions
0.9
XS Area (sq ft)
2.4 Width FPA (ft)
1.9
Width (ft)
1.3 Entrenchment Ratio
0.4
Mean Depth (ft)
5.7 Low Bank Height (ft)
0.6
Max Depth (ft)
10.2 Low Bank Height Ratio
2.6
0.3
4.4
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Width -Depth Ratio

Ground Water Monitoring Preliminary Results
Upper Rocky Mitigation Bank
Pre -Construction Baseline Assessment — July 2016
Thirteen Onset HOBO U20L-04 (13 foot) Data Loggers were installed throughout the Bank premises to
measure groundwater in areas where wetland preservation, restoration, enhancement, or rehabilitation
may occur (Figure 1-D). These wells were installed in April 2016. Preliminary results of the ground
water levels are being recorded daily and will be provided. Comprehensive results will be compared to
rainfall data and used to evaluate areas for wetland restoration.

Benthic Macroinvertebrate Monitoring Results
Upper Rocky Mitigation Bank
Pre -Construction Baseline Assessment — Summer 2016
WLS staff collected benthic macrointerebrate samples at two locations within the proposed Upper
Rocky Mitigation Bank in July of 2016 in accordance with the Division of Water Resources Biological
Assessment Branch (BAB) Qual 4 sampling protocol (NCDWR 2016). The macroinvertebrate collection
sites (Figure 1-D) were a subset of four water quality sites that were monitored for temperature, pH,
dissolved oxygen, and specific conductance. Identification and bioclassification of the samples were
conducted by Penrose Consulting in August 2016. Table 1 summarizes the results of this
bioclassification.
Little to no habitat existed for macroinvertebrates at Site 1. The stream was channelized and filled in
with sediment from upstream construction activities. No riffle pool structure was present. At Site 2,
there was suitable habitat. Although the channel is deeply incised, there are riffles and pools present
and there is a mixture of cobble, gravel, and sand.
No macroinvertebrates were found at Site 1; therefore, it receives a classification of "Poor'. Some
macroinvertebrates were found at Site 2 and are shown in Table 1. Site 2 received a classification of
"Fair".

Benthic Macroin vertebrate Monitoring Results
Upper Rocky Mitigation Bank
Table 1. Bioclassification of Macroin vertebrate Samples
Collection Location
Site 1
Site 2
Collection Date (mo/year)
7/6/2016
7/6/2016
Taxa Name (Biotic Index value)
Trichoptera
Family Hydropsychidae
Cheumatopsyche spp (6.6)
1
Diplectrona modesta (2.3)
1
Hydropsyche betteni (7.9)
2
Diptera: Miscellaneous families
Family Simuliidae
Simulium spp (4.9)
2
Family Tipulidae
Tipula spp (7.5)
1
Chironomidae
Parametriocnemus lundbecki (3.7)
Polypedilum aviceps (3.6)
Polypedilum illinoense grp. (8.7)
Polypedilum halterale (7.4)
Polypedilum scalaenum (8.5)
1
Rheotanytarsus spp (6.5)
Odonata
Family Coenagrionidae
Argia spp (8.3)
Oligochaeta
Family Lumbriculidae (7.0)
Crustacea
Family Asellidae
Family Cambaridae (immature) (7.5)
Total Taxa Richness
0
6
EPT Taxa Richness
0
3
EPT Abundance
0
4
Biotic Index
0
6.31
Number of taxa = 2.5 or less
0
1
DWR piedmont criteria for small streams
Poor
Fair

Benthic Macroin vertebrate Monitoring Results
Upper Rocky Mitigation Bank
References
NCDWR. 2016. Standard Operating Procedures for Collection and Analysis of Benthic
Macroinvertebrates. NC Division of Water Resources, Biological Assessment Branch. Version
5.0, February 2016. Accessed via: https://ncdenr.s3.amazonaws.com/s3fs-
public/Water%20Quality/Environmental%20Sciences/BAU/NCDWRMacroinvertebrate-SOP-
February%202016_final.pdf
3

Water Quality Monitoring Results
Upper Rocky Mitigation Bank
Pre -Construction Baseline Assessment - Summer 2016
Water quality measurements included surface water temperature (°C), dissolved oxygen (mg/L and %),
specific conductance (µS/cm at 25 °C), and pH. Measurements were made in accordance with NCDWQ
guidance (NCDENR DWQ 2013). All measurements were made in situ in a representative point of the
channel that was flowing and generally at the thalweg. Measurements were made using an YSI
Professional Plus Instrument at four different representative locations during July of 2016. Table 1
outlines the results. Water quality measurements were recorded during baseflow conditions at four
locations within the proposed Bank (Figure 1-D).
Table 1
Site ID
Temperature
(°C)
Dissolved
Oxygen (mg/L)
Dissolved
Oxygen (%)
Specific
Conductance
([IS/cm)
pH
UR -1
22.3
6.54
74.7
116.7
7.70
UR -2
21.3
6.34
71.3
175.6
7.18
UR -3
22.0
4.79
54.9
129.6
7.46
UR -4
21.7
6.42
73.5
158.9
7.43
Results of monitoring efforts were analyzed based on guidance from the "REDBOOK" published by
NCDENR DWQ in 2003. The temperature results ranged from 21.3° C to 22.3° C. Temperatures should
not exceed 2.8 degrees above natural water temperature and should never exceed 29° C. Our results
therefore reflected a normal seasonal range. The water quality standard for dissolved oxygen in non -
trout waters of North Carolina is to remain above a daily average of 5.0 mg/L with a minimum value of
4.0 mg/L. The results of dissolved oxygen in the Bank easement boundaries ranged from 4.79 mg/L to
6.54 mg/L. Only one sample point was below 5.0 mg/L and no sampling points were below the minimum
value. The pH should range between 6.0 SU and 9.0 SU generally, except in backwater conditions where
the pH may be as low at 4.3 SU. Inside the Bank easement boundaries the pH ranged from 7.18 SU to
7.70 SU, well within a normal pH range. The specific conductance (SPC) was also measured at all four
sampling locations and ranged from 116.7 SPC to 175.6 SPC. The approximate values that can be
expected for specific conductance of a freshwater streams are between 100-200 pS/cm, considered to
be wide rangeing due to in -stream geology. The values collected on-site fall within the expected values.

Water Quality Monitoring Results
Upper Rocky Mitigation Bank
References
NCDENR DWQ. 2003. "REDBOOK" Surface Waters and Wetlands Standards, (NC Administrative Code
15A NCAC 02B .0100 &.0200) Accessed via: https://www.epa.gov/sites/production/files/2014-
12/documents/nc-classifications-wqs.pdf
NCDENR DWQ. 2013. Intensive Survey Branch Standard Operating Procedures Manual: Physical and
Chemical Monitoring, version 2.1, December 2013. Accessed via:
https://ncdenr.s3.amazonaws.com/s3fs-public/document-library/Appendix%207%20-
%201SB%20SO P%20ver%202.1-Dec.2013. pdf
2