HomeMy WebLinkAbout20180786 Ver 1_SandyBranch_100060_MY3_2023_20240205
MONITORING YEAR 3
ANNUAL REPORT
FINAL
January 2024
SANDY BRANCH MITIGATION SITE
Chatham County, NC
Cape Fear River Basin
HUC 03030003
DMS Project No. 100060
NCDEQ Contract No. 7527
USACE Action ID No. SAW-2018-01167
NCDWR Project No. 2018-0786
Data Collection Period: January-November 2023
DMS RFP No. 16-007331
PREPARED FOR:
NC Department of Environmental Quality
Division of Mitigation Services
1652 Mail Service Center
Raleigh, NC 27699-1652
Wildlands Engineering, Inc. (P) 919.851.9986 • 312 West Millbrook Road, Suite 225 • Raleigh, NC 27609
January 30, 2024
Jeremiah Dow
Eastern Regional Supervisor
North Carolina DEQ Division of Mitigation Services
217 West Jones Street, Raleigh, NC 27601
RE: DMS Comments on the MY3 Report
Sandy Branch, Project ID #100060, DMS Contract 7527
Dear Mr. Dow:
We have reviewed the comments on the MY3 Report for the above referenced project dated January
29, 2024 and have revised the report based on these comments. The revised documents are submitted
with this letter. Below are responses to each of the comments. For your convenience, the comments are
reprinted with responses in italics.
1. Section 2.2 states multiflora rose and privet were treated ‘within the existing forested area
along the lower portion of Sandy Branch Reach 2…” Were these scattered, individual sprouts or
mappable treatment areas? Please add to CCPV if needed.
Response: These were scattered, individual sprouts outside of the mapping threshold. This
has been clarified in the MY3 report text.
2. Table 5 – Please verify whether cattail treatment area exceeds the 0.1 acre threshold to be
included on this table, and update the table if necessary.
Response: The sporadic cattail treatment areas include 0.10 acres and have been added
to Table 5.
3. Recent scour on the outer bank in a meander was brought to DMS’ attention at the 1/26/2024
site visit, located a short distance upstream of PP16. Please call out location on CCPV and discuss
remedial actions taken, if any, in the MY4 report.
Response: The location of scour on the outside bank of a meander on Sandy Branch Reach
2 has been added to the CCPV, and text has been added to the report. Linear
stream footage of the scour has been added to Table 4. Any remedial actions
taken will be discussed in the MY4 report.
If you have any questions, please contact me by phone (919) 851-9986, or by email
(jlorch@wildlandseng.com).
Wildlands Engineering, Inc. (P) 919.851.9986 • 312 West Millbrook Road, Suite 225 • Raleigh, NC 27609
Sincerely,
Jason Lorch, Monitoring Coordinator
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL i
SANDY BRANCH MITIGATION SITE
Monitoring Year 3 Annual Report
TABLE OF CONTENTS
Section 1: PROJECT OVERVIEW ........................................................................................................ 1-1
1.1 Project Quantities and Credits ................................................................................................... 1-1
1.2 Project Goals and Objectives ..................................................................................................... 1-2
1.3 Project Attributes ....................................................................................................................... 1-3
Section 2: MONITORING YEAR 3 DATA ASSESSMENT ........................................................................ 2-1
2.1 Vegetative Assessment .............................................................................................................. 2-1
2.2 Vegetation Areas of Concern and Management ....................................................................... 2-1
2.3 Stream Assessment .................................................................................................................... 2-1
2.4 Stream Areas of Concern and Management .............................................................................. 2-2
2.5 Hydrology Assessment ............................................................................................................... 2-2
2.6 Wetland Assessment .................................................................................................................. 2-2
2.7 Monitoring Year 3 Summary ...................................................................................................... 2-2
Section 3: REFERENCES .................................................................................................................... 3-1
TABLES
Table 1. Project Mitigation Quantities and Credits .................................................................................... 1-1
Table 2. Goals, Performance Criteria, and Functional Improvements ....................................................... 1-2
Table 3. Project Attributes ......................................................................................................................... 1-4
FIGURES
Figure 1 Current Condition Plan View
APPENDICES
Appendix A Visual Assessment Data
Table 4 Visual Stream Morphology Stability Assessment Table
Table 5 Vegetation Condition Assessment Table
Stream Photographs
Culvert Crossing Photographs
Vegetation Plot Photographs
Groundwater Gauge Photographs
Appendix B Vegetation Plot Data
Table 6 Vegetation Plot Data
Table 7 Vegetation Performance Standards Summary Table
Appendix C Stream Geomorphology Data
Cross-Section Plots
Table 8 Baseline Stream Data Summary
Table 9 Morphology and Hydraulic Summary (Dimensional Parameters - Cross-Section)
Appendix D Hydrology Data
Table 10 Bankfull Events
Table 11 Rainfall Summary
Table 12 Groundwater Gauge Summary
Groundwater Gauge Plots
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL ii
Appendix E Project Timeline and Contact Info
Table 13 Project Activity and Reporting History
Table 14 Project Contact Table
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 1-1
Section 1: PROJECT OVERVIEW
The Sandy Branch Mitigation Site (Site) is located in Chatham County, approximately seven miles
southeast of Siler City, NC in the Cape Fear River Basin 8-Digit Hydrologic Unit Code (HUC) 03030003.
The Site involves re-establishing a stream and wetland complex utilizing stream restoration, wetland re-
establishment, and wetland rehabilitation approaches. The Site is located within the DMS Targeted Local
Watershed (TLW) for the Cape Fear River Basin HUC 03030003070050 (Bear Creek TLW) and the NC
DWR Subbasin 03-06-12. The Sandy Branch Mitigation Site is one of the projects identified in the Upper
Rocky River Local Watershed Plan as a priority for stream and wetland restoration.
1.1 Project Quantities and Credits
A conservation easement was recorded on 18.10 acres and was fenced prior to construction (Figure 1).
Mitigation work within the Site included 3,286 linear feet of perennial stream channel restoration and
8.540 acres of wetland re-establishment and rehabilitation. The project is expected to provide 3,286.000
stream credits and 7.267 wetland credits at closeout.
Table 1. Project Mitigation Quantities and Credits Project Components
Project
Segment
Mitigation
Plan
Footage/
Acreage
As-Built
Footage/
Acreage
Mitigation
Category
Restoration
Level
Mitigation
Ratio (X:1) Credits Comments
Stream
Sandy Branch
R1
861 849 Warm R 1 861.000
Full Channel
Restoration, Planted
Buffer, Fencing Out
Livestock
40 40 Warm N/A N/A N/A External Crossing,
Culvert
110 104 Warm R 1 110.000 Full Channel
Restoration,
Planted Buffer,
Fencing Out
Livestock
Sandy Branch
R2 1,929 1,919 Warm R 1 1,929.000
UT1 131 125 Warm R 1 131.000
UT2 255 254 Warm R 1 255.000
Total: 3,286.000
Wetland
Re-
establishment N/A 4.721 Riparian R 1.000 4.721
Rehabilitation 3.819 3.819 Riparian RE 1.500 2.546
Total: 7.267
Blue = Restoration
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 1-2
Project Credits
Restoration Level Stream - Warm Riparian Wetland -
Riverine
Restoration 3,286.000
Re-establishment 4.721
Rehabilitation 2.546
Totals 3,286.000 7.267
1.2 Project Goals and Objectives
The project is intended to provide numerous ecological benefits within the Cape Fear River Basin. While
benefits such as habitat improvement and geomorphic stability are limited to the Site, reduced nutrient
and sediment loading have further reaching effects. Table 2 below describes expected outcomes to
water quality and ecological processes associated with the project goals and objectives. These goals
were established and completed with careful consideration of goals and objectives described in the
River Basin Restoration Priorities and to meet the DMS mitigation needs while maximizing the ecological
and water quality uplift within the watershed.
Table 2: Goals, Performance Criteria, and Functional Improvements
Goal Objective/ Treatment Likely Functional
Uplift Performance Criteria Measurement Monitoring
Results
Improve the
stability of
stream
channels
Reconstruct stream
channels that will
maintain stable
pattern and profile
considering hydrologic
and sediment inputs
to the system,
landscape setting, and
the watershed
conditions.
Reduce sediment
inputs from bank
erosion. Contribute
to protection of, or
improvement to, a
Nutrient-Sensitive
Water.
Entrenchment ratios
remaining above 2.2
and bank height ratios
remaining below 1.2,
coarser material in
riffles and finer
material in pools, and
progression towards
stability shown in
visual inspections.
Cross-section
monitoring will be
assessed during
MY1, MY2, MY3,
MY5, and MY7 and
visual inspections
will be assessed
annually.
No deviations
from design.
Reconnect
channels with
floodplains
and riparian
wetlands
Reconstruct stream
channels with
appropriate bankfull
dimensions and depth
relative to the existing
floodplain.
Reduce shear
stress on channels,
hydrate adjacent
wetland areas, and
filter pollutants
from overbank
flows.
Four bankfull events in
separate years within
monitoring period.
Crest gauges
and/or pressure
transducers
recording flow
elevations.
Five bankfull
events were
recorded during
MY3.
Improve
in-stream
habitat
Install habitat features
such as constructed
riffles, lunker logs, and
brush toe into
restored streams. Add
woody material to
channel beds.
Construct pools of
varying depths.
Improve aquatic
communities in
project streams.
There is no required
performance standard
for this metric.
N/A N/A
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 1-3
Goal Objective/ Treatment Likely Functional
Uplift Performance Criteria Measurement Monitoring
Results
Restore
wetland
hydrology,
soils, and
plant
communities
Re-establish and
rehabilitate riparian
wetlands by raising
stream beds and
planting native
wetland species.
Improve terrestrial
habitat. Contribute
to protection of, or
improvement to, a
Nutrient-Sensitive
Water.
Free groundwater
surface within 12
inches of the ground
surface for 10% (27
days) of the growing
season under normal
precipitation
conditions.
12 groundwater
gauges equipped
with pressure
transducers are
located in
representative
wetland areas and
monitored
annually. Two
additional gauges
were installed
during MY2 per IRT
request.
12 out of 14
groundwater
gauges had
groundwater
within 12 inches
of the ground
surface for 10.0%
(27 days) of the
growing season
consecutively.
Restore and
enhance
native
floodplain
vegetation
Plant native tree
species in riparian
zones where currently
insufficient.
Reduce/control
sediment inputs,
reduce/manage
nutrient inputs,
provide canopy to
shade streams and
reduce thermal
loadings,
contribute to
protection of, or
improvement to, a
Nutrient-Sensitive
Water.
Survival rate of 320
stems per acre at
MY3, 260 planted
stems per acre at
MY5, and 210 stems
per acre at MY7.
Planted stems must
average at least seven
feet in height in each
plot at the end of MY5
and 10 feet in height
in each plot by the
end of MY7.
One hundred
square meter
vegetation plots
are placed on 2%
of the planted area
of the Site and
monitored during
MY1, MY2, MY3,
MY5, and MY7.
All 13 vegetation
plots have a
planted stem
density greater
than 320 stems
per acre.
Permanently
protect the
project site
from harmful
uses
Establish conservation
easements and fence
the Site.
Prevent
development and
agricultural uses
that would damage
the Site or reduce
the benefits of the
project.
Prevent easement
encroachment.
Visually inspect the
perimeter of the
Site to ensure no
easement
encroachment is
occurring.
No easement
encroachments.
1.3 Project Attributes
The Site is located on a single parcel bounded by Elmer Moore Road on the northern edge and other
agricultural parcels to the east, south, and west. Prior to restoration, the Site was an active livestock
operation characterized by extensively grazed pasture, minimal riparian vegetation, and project streams
functioning as the primary water source for livestock. The streams and riparian buffers onsite were in
the same approximate configurations since before 1965, according to aerial photographs. In general, the
area maintained its rural, agricultural character for more than 50 years with only minor changes in land
use and land cover. Table 3 below and Table 8 in Appendix C present additional information on pre-
restoration conditions.
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 1-4
Table 3. Project Attributes Project Information
Project Name Sandy Branch Mitigation Site
County Chatham
Project Area (acres) 18.10
Project Coordinates (latitude and longitude decimal) 35°38’35"N 79°23'14"W
Project Watershed Summary Information
Physiographic Province Piedmont
River Basin Cape Fear
USGS Hydrologic Unit 8-digit 03030003
DWR Sub-basin 03-06-12
Project Drainage Area (acres) 463
Project Drainage Area Percentage of Impervious Area 2%
Land Use Classification 49% Cultivated Crops, 36% Forested, 13% Developed, 2% Other
Reach Summary Information
Parameters Sandy
Branch R1
Sandy
Branch R2 UT1 UT2
Pre-project length (feet) 964 1,931 102 257
Post-project length (feet) 953 1,919 125 254
Valley confinement Unconfined
Drainage area (acres) 323 388-463 35 73
Perennial, Intermittent, Ephemeral Perennial
NCDWR Water Quality Classification C, NSW
Dominant Stream Classification (existing) E4/F4 F4 E4/F4 F4
Dominant Stream Classification (proposed) C4
Dominant Evolutionary Classification (Simon) Stage III: Degradation
Wetland Summary Information
Parameters Re-establishment Rehabilitation
Pre-project area (acres) N/A 3.819
Post-project area (acres) 4.721 3.819
Wetland Type (non-riparian, riparian) Riparian Riparian
Mapped Soil Series CmB - Cid-Lignum complex, 2-6% slopes
Soil Hydric Status Predominantly Non-Hydric
Regulatory Considerations
Regulation Applicable? Resolved? Supporting Docs?
Waters of the United States - Section 404 Yes Yes USACE Nationwide Permit No.
27 and DWQ 401 Water Quality
Certification No. 4134. Waters of the United States - Section 401 Yes Yes
Endangered Species Act Yes Yes Categorical Exclusion in
Mitigation Plan (Wildlands,
2019) Historic Preservation Act Yes Yes
Coastal Zone Management Act (CZMA or CAMA) N/A
Essential Fisheries Habitat N/A
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 2-1
Section 2: MONITORING YEAR 3 DATA ASSESSMENT
Annual monitoring and site visits were conducted during MY3 to assess the condition of the project. The
vegetation and stream success criteria for the Site follow the approved success criteria presented in the
Mitigation Plan (Wildlands, 2019). Performance criteria for vegetation, stream, and hydrologic
assessment are located in Section 1.2 Table 2: Goals, Performance Criteria, and Functional
Improvements. Methodology for annual monitoring is presented in the MY0 Annual Report (Wildlands,
2021).
2.1 Vegetative Assessment
The MY3 vegetative survey was completed in August 2023. Vegetation monitoring resulted in an
average planted stem density of 486 stems per acre, with individual plots ranging from 364 to 567
planted stems per acre. All 13 plots are well above the interim requirement of 320 stems per acre
required at MY3 and are on track to meet the final success criteria required for MY7. Per IRT request, a
random vegetation plot was conducted near groundwater well 12. Herbaceous vegetation growth is
flourishing across the Site and is providing effective ground coverage to filter incoming runoff and
nutrients. Refer to Appendix A for Vegetation Plot Photographs and the Vegetation Condition
Assessment Table and Appendix B for Vegetation Plot Data.
2.2 Vegetation Areas of Concern and Management
To combat invasive species and encourage native vegetative growth, scattered individual sprouts of
multiflora rose (Rosa multiflora) and Chinese privet (Ligustrum sinense) within the existing forested area
along the lower portion of Sandy Branch Reach 2 were physically and chemically treated in February
2023, and again in August 2023. Smaller, sporadic populations of Chinese privet (Ligustrum sinense)
along the upper portion of Sandy Branch Reach 1, above the crossing, were treated in October 2023.
Isolated cattail (Typha spp.) populations (0.10 acres total) within wetlands along the upper portion of
Sandy Branch Reach 2 were treated in September 2023. High density fescue was treated with sprays
around planted stems and between as needed sitewide in April 2023 to help promote tree growth.
Additional ring sprays and overseeding are planned for especially dense areas along the western side of
Sandy Branch Reach 2 for spring 2024. Wildlands will continue to monitor and assess further treatment
needs.
2.3 Stream Assessment
Morphological surveys for MY3 were conducted in March 2023. A vast majority of the streams within
the Site are stable and functioning as designed. Cross-sections 7 and 8, located on riffles within UT1 and
UT2 respectively, showed minor sediment deposition within the channel. Both UT1 and UT2 originate as
non-project streams in areas with active livestock use. The upstream portions of UT1 and UT2, outside
of the easement, are eroding and flushing sediment into the project streams. Both streams will be
closely monitored but no management action will be taken at this time. All 8 cross-sections at the Site
show little to no change in the bankfull areas and width-to-depth ratios, and bank height ratios are less
than 1.2. Pebble count data is no longer required per the September 29, 2021, IRT Technical Work
Group Meeting. The IRT reserves the right to request pebble count data and particle distributions if
deemed necessary during the monitoring period. Refer to Appendix A for the Visual Stream Morphology
Stability Assessment Table and Stream Photographs. Refer to Appendix C for Stream Geomorphology
Data.
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 2-2
2.4 Stream Areas of Concern and Management
Scour was observed on the outside bank of a bend on the lower portion of Sandy Branch Reach 2. This
area includes approximately 25 linear feet of streambank. This most likely occurred from a series of high
flow events resulting from several large storms between December 2023-January 2024. Remedial action
will be taken in MY4, and this area will continue to be monitored and documented. Refer to Appendix A
for the Current Condition Plan View.
2.5 Hydrology Assessment
At the end of MY7, four or more bankfull events must have occurred in separate years within the
restoration reaches of Sandy Branch. Multiple bankfull events were recorded on Sandy Branch Reach 2
during MY1, MY2, and MY3, resulting in partial attainment of the final stream hydrology assessment
success criteria. Refer to Appendix D for hydrologic data.
2.6 Wetland Assessment
The performance criteria for wetland hydrology is groundwater within 12 inches of the ground surface
for 10.0% (27 days) of the growing season consecutively. The growing season is set as March 1st through
November 17th (261 days) and was approved by the IRT during the April 2023 Credit Release Meeting.
Therefore, the soil temperature probe is no longer necessary and will be removed. Of the fourteen
groundwater gauges on the Site, twelve met the success criteria during MY3. The twelve gauges that
met were all well above the success criteria of 27 days, all meeting with 37-110 days consecutively.
Although groundwater gauges 2 and 6 narrowly missed with a hydroperiod of 9.9% (26 days) and 8.8%
(23 days), they were close to the 10% success criteria. Annual precipitation was lower than normal
throughout MY3, especially in late February through March, which likely contributed to not meeting
success criteria. Additionally, after construction of the stream channel, it is anticipated that the
groundwater table will take some time to recharge. Overall, the data is trending positively, and it is
expected that groundwater gauges 2 and 6 will continue to trend in a positive direction in subsequent
monitoring years. Per the IRT’s request, two additional groundwater gauges were installed in wetland
re-establishment areas on April 28, 2022. After installation and a complete year of observation,
groundwater gauges 13 and 14 have successfully met the criteria with a hydroperiod of 38.5% (101 days)
and 27.5% (72 days) respectively. Refer to Figure 1 for the groundwater gauge locations and Appendix D
for groundwater hydrology data and plots.
2.7 Monitoring Year 3 Summary
All vegetation plots are on track to exceed the MY3 interim requirement of 320 planted stems per acre.
Vegetative cover has become well established and planted tree species are showing positive trends in
both density and vigor. Herbaceous growth is flourishing across the Site and is providing effective
ground coverage to filter incoming runoff and nutrients. The vast majority of project streams are stable
and functioning as designed. One meander bend at the bottom of Sany Branch Reach 2 had some recent
scour, likely a result of several large storm events. Twelve of the fourteen groundwater gauges met
success criteria in MY3. Groundwater gauges 2 and 6 missed success criteria by a narrow margin.
Overall, data for the Site reflects a positive trend in groundwater and is expected to successfully
recharge in subsequent years. Per IRT request, two additional groundwater gauges were installed in
wetland re-establishment areas on April 28, 2022. After a complete year of observation, groundwater
gauges 13 and 14 have successfully met performance criteria in MY3. Sandy Branch Reach 2 had
multiple bankfull events in MY1, MY2, and MY3, resulting in partial attainment of the final stream
hydrology assessment success criteria. The easement boundary has been walked and no signage issues
were observed. The stream crossing is stable, and all fences are in good condition and keeping livestock
out of the easement.
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 2-3
Summary information and data related to the performance of various project and monitoring elements
can be found in the tables and figures in the report appendices. All raw data supporting the tables and
figures in the appendices are available from DMS upon request.
Sandy Branch Mitigation Site
Monitoring Year 3 Annual Report – FINAL 3-1
Section 3: REFERENCES
Lee, Michael T., Peet, Robert K., Steven D., Wentworth, Thomas R. 2006. CVS-EEP Protocol for Recording
Vegetation Version 4.0.
North Carolina Department of Environmental Quality, Division of Mitigation Services (DMS). 2017.
Annual Monitoring Report Format, Data Requirements, and Content Guidance June 2017.
North Carolina Ecosystem Enhancement Program (EEP), 2009. Cape Fear River Basin Restoration
Priorities.
North Carolina Geological Survey (NCGS), 1985. Geologic map of North Carolina 1:500,000 scale.
Compiled by Philip M. Brown at el. Raleigh, NC, NCGS.
North Carolina Interagency Review Team. 2016. Wilmington District Stream and Wetland Compensatory
Mitigation Update.
Rosgen, D. L. 1994. A classification of natural rivers. Catena 22:169-199.
Rosgen, D.L. 1996. Applied River Morphology. Pagosa Springs, CO: Wildland Hydrology Books.
United States Army Corps of Engineers (USACE). 2003. Stream Mitigation Guidelines. USACE, NCDENR-
DWQ, USEPA, NCWRC.
Wildlands Engineering, Inc. (2019). Sandy Branch Mitigation Project Mitigation Plan. DMS, Raleigh, NC.
Figure 1. Current Condition Plan View
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 - 2023
Chatham County, NC
2018 Aerial Photography
!A
GF
GF
GF
GF
GF
GF GF
GF
GF
GF
GF
GF
GF
GF
GF
GFGF
GF
!A
Elmer Moore Rd
Sandy Branch
Reach 1
UT2
Sandy Branch
Reach 2
UT1
2
0
1
+
0
0
30
1
+
0
0
129+00
125+
0
0
121+00
117+00
113+00
105+
0
0
101+00
109+00
PP 9
PP 8
PP 6PP 7
PP 5
PP 4
PP 3
PP 2
PP 16
PP 17
PP
1
5
PP 18 PP 14
PP 13
PP 12
PP 11
PP 10
PP 1
X
S
5
XS 6
XS 3
XS 8
XS 1
XS
2
XS 4
XS 7
6
4
9
2
8
7
1
3
5
10 11
13
12
GWG 13
GWG 14
!P
!A
!A
!A
!A
!A
!A
!A
!A
!A
!A
!A
!A
!A
!A GWG 1
GWG 2
GWG 3
GWG 9
GWG 8
GWG 7
GWG 5
GWG 6
GWG 12
GWG 10
GWG 11
GWG 4
Conservation Easement
Wetland Re-establishment
Wetland Rehabilitation
Structures
Cattail Treatment
Vegetation Plot Condition - MY3
Criteria Met - Fixed
Criteria Met - Random
Cross-Sections
Stream Restoration
Bank Scour
As-Built Top of Bank
!P Reach Break
GF Photo Points
!A Crest Gauge
!A Barotroll
Groundwater Gauge Condition - MY3
!A Criteria Met
!A Criteria Not Met
0 300150 Feet ¹
APPENDIX A. VISUAL ASSESSMENT DATA
Table 4. Visual Stream Morphology Stability Assessment Table
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
Sandy Branch Reach 1
953
1,906
Surface Scour/
Bare Bank
Bank lacking vegetative cover resulting simply from
poor growth and/or surface scour.0 100%
Toe Erosion
Bank toe eroding to the extent that bank failure
appears likely. Does NOT include undercuts that are
modest, appear sustainable and are providing
habitat.
0 100%
Bank Failure Fluvial and geotechnical ‐ rotational, slumping,
calving, or collapse.0 100%
0 100%
Grade Control Grade control structures exhibiting maintenance of
grade across the sill. 13 13 100%
Bank Protection Bank erosion within the structures extent of
influence does not exceed 15%. 8 8 100%
Visual Assessment was completed November 20, 2023.
Sandy Branch Reach 2
1,919
3,838
Surface Scour/
Bare Bank
Bank lacking vegetative cover resulting simply from
poor growth and/or surface scour.0 100%
Toe Erosion
Bank toe eroding to the extent that bank failure
appears likely. Does NOT include undercuts that are
modest, appear sustainable and are providing
habitat.
0 100%
Bank Failure Fluvial and geotechnical ‐ rotational, slumping,
calving, or collapse.25 99%
25 99%
Grade Control Grade control structures exhibiting maintenance of
grade across the sill. 24 24 100%
Bank Protection Bank erosion within the structures extent of
influence does not exceed 15%. 14 14 100%
Visual Assessment was completed November 20, 2023.
% Stable,
Performing as
Intended
Major Channel Category Metric
Number
Stable,
Performing
as Intended
Total
Number in
As‐Built
Amount of
Unstable
Footage
% Stable,
Performing as
Intended
Assessed Stream Length
Assessed Bank Length
Bank
Totals:
Structure
Structure
Major Channel Category Metric
Number
Stable,
Performing
as Intended
Total
Number in
As‐Built
Amount of
Unstable
Footage
Assessed Stream Length
Assessed Bank Length
Bank
Totals:
Table 4. Visual Stream Morphology Stability Assessment Table
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
UT1
125
250
Surface Scour/
Bare Bank
Bank lacking vegetative cover resulting simply from
poor growth and/or surface scour.0 100%
Toe Erosion
Bank toe eroding to the extent that bank failure
appears likely. Does NOT include undercuts that are
modest, appear sustainable and are providing
habitat.
0 100%
Bank Failure Fluvial and geotechnical ‐ rotational, slumping,
calving, or collapse.0 100%
0 100%
Grade Control Grade control structures exhibiting maintenance of
grade across the sill. 4 4 100%
Bank Protection Bank erosion within the structures extent of
influence does not exceed 15%. 2 2 100%
Visual Assessment was completed November 20, 2023.
UT2
254
508
Surface Scour/
Bare Bank
Bank lacking vegetative cover resulting simply from
poor growth and/or surface scour.0 100%
Toe Erosion
Bank toe eroding to the extent that bank failure
appears likely. Does NOT include undercuts that are
modest, appear sustainable and are providing
habitat.
0 100%
Bank Failure Fluvial and geotechnical ‐ rotational, slumping,
calving, or collapse.0 100%
0 100%
Grade Control Grade control structures exhibiting maintenance of
grade across the sill. 6 6 100%
Bank Protection Bank erosion within the structures extent of
influence does not exceed 15%. 1 1 100%
Visual Assessment was completed November 20, 2023.
Totals:
Structure
% Stable,
Performing as
Intended
Assessed Stream Length
Assessed Bank Length
Bank
Major Channel Category Metric
Number Stable,
Performing as
Intended
Total
Number in
As‐Built
Amount of
Unstable
Footage
Assessed Stream Length
Assessed Bank Length
Totals:
Bank
Structure
% Stable,
Performing as
Intended
Major Channel Category Metric
Number Stable,
Performing as
Intended
Total
Number in
As‐Built
Amount of
Unstable
Footage
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
Planted Acreage 15.87
Vegetation Category Definitions
Mapping
Threshold
(ac)
Combined
Acreage
% of Planted
Acreage
Bare Areas Very limited cover of both woody and herbaceous material.0.10 0 0%
Low Stem Density
Areas
Woody stem densities clearly below target levels based on current MY stem count
criteria.0.10 0 0%
00%
Areas of Poor Growth
Rates
Planted areas where average height is not meeting current MY Performance
Standard.0.10 0 0%
0.0 0%
Visual Assessment was completed November 20, 2023.
Easement Acreage 18.10
Vegetation Category Definitions
Mapping
Threshold
(ac)
Combined
Acreage
% of
Easement
Acreage
Invasive Areas of
Concern
Invasives may occur outside of planted areas and within the easement and will
therefore be calculated against the total easement acreage. Include species with the
potential to directly outcompete native, young, woody stems in the short‐term or
community structure for existing communities. Invasive species included in
summation above should be identified in report summary.
0.10 0.1* 1%
Easement
Encroachment Areas
Encroachment may be point, line, or polygon. Encroachment to be mapped consists
of any violation of restrictions specified in the conservation easement. Common
encroachments are mowing, cattle access, vehicular access. Encroachment has no
threshold value as will need to be addressed regardless of impact area.
none
Visual Assessment was completed November 20, 2023.
*Small isolated populations of cattail (Typha spp.) treated during MY3.
Table 5. Vegetation Condition Assessment Table
Total
Cumulative Total
0 Encroachments Noted
/ 0 ac
STREAM PHOTOGRAPHS
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 1 Sandy Branch R1 – upstream (02/15/2023) PHOTO POINT 1 Sandy Branch R1 – downstream (02/15/2023)
PHOTO POINT 2 Sandy Branch R1 – upstream (02/15/2023) PHOTO POINT 2 Sandy Branch R1 – downstream (02/15/2023)
PHOTO POINT 3 Sandy Branch R1 – upstream (02/15/2023) PHOTO POINT 3 Sandy Branch R1 – downstream (02/15/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 4 Sandy Branch R1 – upstream (02/15/2023) PHOTO POINT 4 Sandy Branch R1 – downstream (02/15/2023)
PHOTO POINT 5 Sandy Branch R1 – upstream (02/15/2023) PHOTO POINT 5 Sandy Branch R1 – downstream (02/15/2023)
PHOTO POINT 6 UT1 – upstream (02/15/2023) PHOTO POINT 6 UT1 – downstream (02/15/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 7 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 7 Sandy Branch R2 – downstream (02/15/2023)
PHOTO POINT 8 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 8 Sandy Branch R2 – downstream (02/15/2023)
PHOTO POINT 9 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 9 Sandy Branch R2 – downstream (02/15/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 10 Sandy Branch R2 – upstream (03/14/2023) PHOTO POINT 10 Sandy Branch R2 – downstream (03/14/2023)
PHOTO POINT 11 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 11 Sandy Branch R2 – downstream (02/15/2023)
PHOTO POINT 12 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 12 Sandy Branch R2 – downstream (02/15/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 13 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 13 Sandy Branch R2 – downstream (02/15/2023)
PHOTO POINT 14 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 14 Sandy Branch R2 – downstream (02/15/2023)
PHOTO POINT 15 Sandy Branch R2 – upstream (02/15/2023) PHOTO POINT 15 Sandy Branch R2 – downstream (02/15/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Stream Photographs
PHOTO POINT 16 Sandy Branch R2 – upstream (03/14/2023) PHOTO POINT 16 Sandy Branch R2 – downstream (03/14/2023)
PHOTO POINT 17 UT2 – upstream (02/15/2023) PHOTO POINT 17 UT2 – downstream (02/15/2023)
PHOTO POINT 18 UT2 – upstream (03/14/2023) PHOTO POINT 18 UT2 – downstream (03/14/2023)
CULVERT CROSSING PHOTOGRAPHS
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data ‐ Culvert Crossing Photographs
Sandy Branch R1 – Looking Upstream (11/20/2023) Sandy Branch R1 – Looking Downstream (11/20/2023)
VEGETATION PLOT PHOTOGRAPHS
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Vegetation Plot Photographs
FIXED VEG PLOT 1 (08/03/2023) FIXED VEG PLOT 2 (08/03/2023)
FIXED VEG PLOT 3 (08/03/2023) FIXED VEG PLOT 4 (08/03/2023)
FIXED VEG PLOT 5 (08/03/2023) FIXED VEG PLOT 6 (08/03/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Vegetation Plot Photographs
FIXED VEG PLOT 7 (08/03/2023) FIXED VEG PLOT 8 (08/03/2023)
FIXED VEG PLOT 9 (08/03/2023) FIXED VEG PLOT 10 (08/03/2023)
RANDOM VEG PLOT 11 (08/03/2023) RANDOM VEG PLOT 12 (08/03/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Vegetation Plot Photographs
RANDOM VEG PLOT 13 (08/03/2023)
GROUNDWATER GAUGE PHOTOGRAPHS
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Groundwater Gauge Photographs
GROUNDWATER GAUGE 1 (11/20/2023) GROUNDWATER GAUGE 2 (11/20/2023)
GROUNDWATER GAUGE 3 (11/20/2023) GROUNDWATER GAUGE 4 (11/20/2023)
GROUNDWATER GAUGE 5 (12/1/2023) GROUNDWATER GAUGE 6 (11/20/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Groundwater Gauge Photographs
GROUNDWATER GAUGE 7 (11/20/2023) GROUNDWATER GAUGE 8 (11/20/2023)
GROUNDWATER GAUGE 9 (11/20/2023) GROUNDWATER GAUGE 10 (11/20/2023)
GROUNDWATER GAUGE 11 (11/20/2023) GROUNDWATER GAUGE 12 (11/20/2023)
Sandy Branch Mitigation Site
Appendix A: Visual Assessment Data – Groundwater Gauge Photographs
GROUNDWATER GAUGE 13 (11/20/2023) GROUNDWATER GAUGE 14 (11/20/2023)
APPENDIX B. VEGETATION PLOT DATA
Table 6. Vegetation Plot Data
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
15.87
2020‐03‐01
2022‐08‐02
0.0247
Planted Total Planted Total Planted Total Planted Total
Acer negundo boxelder Tree FAC 1 1 1 1
Betula nigra river birch Tree FACW 22222222
Diospyros virginiana common persimmon Tree FAC 1 1 22
Platanus occidentalis American sycamore Tree FACW 22441133
Quercus falcata southern red oak Tree FACU
Quercus michauxii swamp chestnut oak Tree FACW 113333
Quercus nigra water oak Tree FAC 1 1
Quercus pagoda cherrybark oak Tree FACW 2 2 1 1
Quercus phellos willow oak Tree FACW 113311
Quercus shumardii Shumard's oak Tree FAC
Salix nigra black willow Tree OBL 1 1 1111
Ulmus rubra slippery elm Tree FAC 1 1 2 2
Sum Performance Standard 11 11 14 14 10 10 10 10
Fraxinus pennsylvanica green ash Tree FACW
Sum Proposed Standard 11 11 14 14 10 10 10 10
11 14 10 10
445 567 405 405
8675
18 29 30 30
5753
0000
11 14 10 10
445 567 405 405
8675
18 29 30 30
5753
0000
Veg Plot 1 F Veg Plot 2 F Veg Plot 3 F Veg Plot 4 F
Date of Current Survey
Plot size (ACRES)
Species
Included in
Approved
Mitigation Plan
Post Mitigation
Plan Species
Mitigation Plan
Performance
Standard
Tree/S
hrubCommon NameScientific Name
Dominant Species Composition (%)
Average Plot Height (ft.)
% Invasives
Planted Acreage
Date of Initial Plant
Post Mitigation
Plan
Performance
Standard
Current Year Stem Count
Stems/Acre
Species Count
Indicator
Status
% Invasives
Current Year Stem Count
Stems/Acre
Species Count
Dominant Species Composition (%)
Average Plot Height (ft.)
1). Bolded species are proposed for the current monitoring year, italicized species are not approved, and a regular font indicates that the species has been approved.
2). The "Species Included in Approved Mitigation Plan" section contains only those species that were included in the original approved mitigation plan. The "Post Mitigation Plan Species" section includes species that are being proposed through a mitigation plan addendum for the current
monitoring year (bolded) , species that have been approved in prior monitoring years through a mitigation plan addendum (regular font), and species that are not approved (italicized).
3). The "Mitigation Plan Performance Standard" section is derived only from stems included in the original mitigation plan, whereas the "Post Mitigation Plan Performance Standard" includes data from mitigation plan approved, post mitigation plan approved, and proposed stems.
Table 6. Vegetation Plot Data
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
15.87
2020‐03‐01
2022‐08‐02
0.0247
Acer negundo boxelder Tree FAC
Betula nigra river birch Tree FACW
Diospyros virginiana common persimmon Tree FAC
Platanus occidentalis American sycamore Tree FACW
Quercus falcata southern red oak Tree FACU
Quercus michauxii swamp chestnut oak Tree FACW
Quercus nigra water oak Tree FAC
Quercus pagoda cherrybark oak Tree FACW
Quercus phellos willow oak Tree FACW
Quercus shumardii Shumard's oak Tree FAC
Salix nigra black willow Tree OBL
Ulmus rubra slippery elm Tree FAC
Sum Performance Standard
Fraxinus pennsylvanica green ash Tree FACW
Sum Proposed Standard
Date of Current Survey
Plot size (ACRES)
Species
Included in
Approved
Mitigation Plan
Post Mitigation
Plan Species
Mitigation Plan
Performance
Standard
Tree/S
hrubCommon NameScientific Name
Dominant Species Composition (%)
Average Plot Height (ft.)
% Invasives
Planted Acreage
Date of Initial Plant
Post Mitigation
Plan
Performance
Standard
Current Year Stem Count
Stems/Acre
Species Count
Indicator
Status
% Invasives
Current Year Stem Count
Stems/Acre
Species Count
Dominant Species Composition (%)
Average Plot Height (ft.)
Planted Total Planted Total Planted Total Planted Total
1111 11
11442233
11
22332222
33331122
11222211
11
33 3322
1133
11 11 14 14 12 12 14 14
11 11 14 14 12 12 14 14
11 14 12 14
445 567 486 567
6677
27 29 25 21
4454
0000
11 14 12 14
445 567 486 567
6677
27 29 25 21
4454
0000
Veg Plot 5 F Veg Plot 6 F Veg Plot 7 F Veg Plot 8 F
1). Bolded species are proposed for the current monitoring year, italicized species are not approved, and a regular font indicates that the species has been approved.
2). The "Species Included in Approved Mitigation Plan" section contains only those species that were included in the original approved mitigation plan. The "Post Mitigation Plan Species" section includes species that are being proposed through a mitigation plan addendum for the current
monitoring year (bolded) , species that have been approved in prior monitoring years through a mitigation plan addendum (regular font), and species that are not approved (italicized).
3). The "Mitigation Plan Performance Standard" section is derived only from stems included in the original mitigation plan, whereas the "Post Mitigation Plan Performance Standard" includes data from mitigation plan approved, post mitigation plan approved, and proposed stems.
Table 6. Vegetation Plot Data
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
15.87
2020‐03‐01
2022‐08‐02
0.0247
Acer negundo boxelder Tree FAC
Betula nigra river birch Tree FACW
Diospyros virginiana common persimmon Tree FAC
Platanus occidentalis American sycamore Tree FACW
Quercus falcata southern red oak Tree FACU
Quercus michauxii swamp chestnut oak Tree FACW
Quercus nigra water oak Tree FAC
Quercus pagoda cherrybark oak Tree FACW
Quercus phellos willow oak Tree FACW
Quercus shumardii Shumard's oak Tree FAC
Salix nigra black willow Tree OBL
Ulmus rubra slippery elm Tree FAC
Sum Performance Standard
Fraxinus pennsylvanica green ash Tree FACW
Sum Proposed Standard
Date of Current Survey
Plot size (ACRES)
Species
Included in
Approved
Mitigation Plan
Post Mitigation
Plan Species
Mitigation Plan
Performance
Standard
Tree/S
hrubCommon NameScientific Name
Dominant Species Composition (%)
Average Plot Height (ft.)
% Invasives
Planted Acreage
Date of Initial Plant
Post Mitigation
Plan
Performance
Standard
Current Year Stem Count
Stems/Acre
Species Count
Indicator
Status
% Invasives
Current Year Stem Count
Stems/Acre
Species Count
Dominant Species Composition (%)
Average Plot Height (ft.)
Veg Plot 11 R Veg Plot 12 R Veg Plot 13 R
Planted Total Planted Total Total Total Total
11111 1
3333343
22 211
3322222
1
1111312
1
22 1
44
11
11
22 1
12 12 14 14 14 9 11
1
12 12 14 14 14 9 12
12 14 14 9 11
486 567 567 364 445
6 7857
25 29 21 44 27
4 3455
0 0000
12 14 14 9 12
486 567 567 364 486
6 7858
25 29 21 44 27
4 3455
0 0000
Veg Plot 10 FVeg Plot 9 F
1). Bolded species are proposed for the current monitoring year, italicized species are not approved, and a regular font indicates that the species has been approved.
2). The "Species Included in Approved Mitigation Plan" section contains only those species that were included in the original approved mitigation plan. The "Post Mitigation Plan Species" section includes species that are being proposed through a mitigation plan addendum for
the current monitoring year (bolded) , species that have been approved in prior monitoring years through a mitigation plan addendum (regular font), and species that are not approved (italicized).
3). The "Mitigation Plan Performance Standard" section is derived only from stems included in the original mitigation plan, whereas the "Post Mitigation Plan Performance Standard" includes data from mitigation plan approved, post mitigation plan approved, and proposed
stems.
Table 7. Vegetation Performance Standards Summary Table
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives
445 5 8 0 567 7 6 0 405 5 7 0
445 3 8 0 567 4 6 0 405 3 7 0
567 2 9 0 607 2 6 0 486 2 7 0
567 3 9 0 607 3 6 0 567 3 8 0
Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives
405 3 5 0 445 4 6 0 567 4 6 0
405 2 5 0 567 3 7 0 567 3 6 0
445 2 6 0 648 2 8 0 607 3 7 0
486 3 7 0 648 3 8 0 607 3 7 0
Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives
486 5 7 0 567 4 7 0 486 4 6 0
486 3 7 0 526 3 7 0 526 3 7 0
567 3 8 0 567 2 7 0 607 2 8 0
567 3 8 0 607 3 8 0 607 3 8 0
Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives Stems/Ac. Av. Ht. (ft) # Species % Invasives
567 3 7 0 567 4 8 0 364 5 5 0
526 2 7 0 364 3 6 0 445 3 6 0
607 2 7 0 688 3 6 0 567 3 4 0
648 3 7 0 567 3 6 0 364 3 4 0
Stems/Ac. Av. Ht. (ft) # Species % Invasives
445 5 7 0
486 4 7 0
688 2 7 0
607 3 6 0
*Each monitoring year represents a different plot for the random vegetation plot "groups". Random plots are denoted with an R, and fixed plots with an F.
Monitoring Year 2
Monitoring Year 1
Monitoring Year 0
Monitoring Year 1
Monitoring Year 0
Monitoring Year 7
Monitoring Year 5
Monitoring Year 3
Monitoring Year 0
Monitoring Year 7
Monitoring Year 5
Monitoring Year 3
Monitoring Year 2
Monitoring Year 7
Monitoring Year 5
Monitoring Year 3
Monitoring Year 2
Monitoring Year 1
Monitoring Year 7
Monitoring Year 5
Monitoring Year 3
Monitoring Year 2
Monitoring Year 7
Monitoring Year 5
Monitoring Year 3
Monitoring Year 2
Monitoring Year 1
Monitoring Year 1
Monitoring Year 0
Veg Plot 1 F Veg Plot 2 F Veg Plot 3 F
Veg Plot 4 F Veg Plot 5 F Veg Plot 6 F
Veg Plot 7 F Veg Plot 8 F Veg Plot 9 F
Veg Plot 10 F Veg Plot Group 11 R Veg Plot Group 12 R
Veg Plot Group 13 R
Monitoring Year 0
APPENDIX C. STREAM GEOMORPHOLOGY DATA
Cross-Section Plots
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area N/A N/A N/A N/A Bank Height Ratio - Based
on AB-Bankfull Area N/A N/A N/A N/A
Thalweg Elevation 470.62 470.67 470.65 470.65
LTOB Elevation 474.01 474.09 474.12 474.09
LTOB Max Depth 3.39 3.42 3.47 3.44
LTOB Cross-Sectional Area 38.87 38.01 37.42 36.69
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area 473.58 473.79 473.84 473.83 Bank Height Ratio - Based
on AB-Bankfull Area 1.00 0.91 0.86 0.88
Thalweg Elevation 472.04 472.21 472.26 472.23
LTOB Elevation 473.58 473.65 473.63 473.65
LTOB Max Depth 1.54 1.44 1.37 1.42
LTOB Cross-Sectional Area 14.96 12.88 12.00 12.36
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area 465.71 465.83 465.83 465.82 Bank Height Ratio - Based
on AB-Bankfull Area 1.00 0.96 0.95 0.95
Thalweg Elevation 464.27 464.27 464.30 464.25
LTOB Elevation 465.71 465.77 465.76 465.75
LTOB Max Depth 1.44 1.50 1.46 1.50
LTOB Cross-Sectional Area 16.25 15.33 15.06 15.08
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area N/A N/A N/A N/A Bank Height Ratio - Based
on AB-Bankfull Area N/A N/A N/A N/A
Thalweg Elevation 461.58 461.68 461.62 461.49
LTOB Elevation 465.78 465.77 465.82 465.81
LTOB Max Depth 4.19 4.09 4.20 4.32
LTOB Cross-Sectional Area 56.56 52.87 54.15 53.61
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area 461.37 461.40 461.45 461.49 Bank Height Ratio - Based
on AB-Bankfull Area 1.00 1.08 1.09 1.09
Thalweg Elevation 459.87 459.98 459.95 459.98
LTOB Elevation 461.37 461.51 461.58 461.63
LTOB Max Depth 1.50 1.53 1.63 1.65
LTOB Cross-Sectional Area 13.91 15.57 15.87 15.96
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area N/A N/A N/A N/A Bank Height Ratio - Based
on AB-Bankfull Area N/A N/A N/A N/A
Thalweg Elevation 458.14 458.23 458.30 458.26
LTOB Elevation 461.17 461.18 461.23 461.22
LTOB Max Depth 3.04 2.95 2.93 2.96
LTOB Cross-Sectional Area 38.67 34.55 34.22 33.20
Floodplain
Depression
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area 469.34 469.39 469.51 469.57 Bank Height Ratio - Based
on AB-Bankfull Area 1.00 0.96 0.92 0.93
Thalweg Elevation 468.11 468.18 468.38 468.40
LTOB Elevation 469.34 469.34 469.42 469.48
LTOB Max Depth 1.22 1.16 1.04 1.08
LTOB Cross-Sectional Area 5.25 4.86 4.54 4.53
Sandy Branch Mitigation Site
Appendix C: Stream Geomorphology Data – Cross-Section Plots
Downstream (3/14/2023)
MY0 MY1 MY2 MY3 MY5 MY7
Bankfull Elevation - Based
on AB-Bankfull Area 459.29 459.34 459.47 459.50 Bank Height Ratio - Based
on AB-Bankfull Area 1.00 0.92 0.74 0.83
Thalweg Elevation 457.99 458.14 458.18 458.14
LTOB Elevation 459.29 459.24 459.14 459.27
LTOB Max Depth 1.30 1.10 0.96 1.13
LTOB Cross-Sectional Area 8.12 7.14 5.07 5.89
Table 8. Baseline Stream Data Summary
DMS Project No. 100060
Parameter
Riffle Only Min Max n Min Max Min Max n
Bankfull Width (ft)1 1
Floodprone Width (ft)1 1
Bankfull Mean Depth (ft)1 1
Bankfull Max Depth (ft)1 1
Bankfull Cross Sectional Area (ft2)11
Width/Depth Ratio 1 1
Entrenchment Ratio 1 1
Bank Height Ratio 1 1.0 1.2 1
Max part size (mm) mobilized at bankfull
Rosgen Classification
Bankfull Discharge (cfs)
Sinuosity
Water Surface Slope (ft/ft)2 0.0100 0.0140 ‐‐‐0.0017 0.0108
Other
Parameter
Riffle Only Min Max n Min Max Min Max n
Bankfull Width (ft) 7.3 11.0 3 15.0 16.9 2
Floodprone Width (ft) 11.0 40.0 3 70.0 80.0 2
Bankfull Mean Depth (fr) 1.2 1.6 3 0.9 1.0 2
Bankfull Max Depth (ft) 1.7 2.1 3 1.4 1.5 2
Bankfull Cross Sectional Area (ft2)9.1 14.0 3 14.0 16.3 2
Width/Depth Ratio 4.7 8.4 3 16.2 17.5 2
Entrenchment Ratio 1.5 3.7 3 4.1 5.3 2
Bank Height Ratio 1.8 2.4 3 1.0 1.2 1.0 1.0 2
Max particle size (mm) mobilized at bankfull
Rosgen Classification
Bankfull Discharge (cfs) 29.0 39.0 ‐‐‐51.0 58.0 53.2 57.4 2
Sinuosity
Water Surface Slope (ft/ft)2 0.0041 0.0090 ‐‐‐0.0044 0.0241
Other
14.9
13.9
>6.9
1.0
1.3
6.6 14.0
>60.0 >30.8
1.0
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
14.4
100.0
1.0
1.5
PRE‐EXISTING
CONDITIONS DESIGN MONITORING BASELINE
(MY0)
Sandy Branch R1
0.9
1.6
6.6 13.2
6.5 14.8
>9.1 >2.2
1.0
C4 C4
22.0 44.0 50.9
87.0 88.0 82.7
E4/F4
1.16
Sandy Branch R2
16.0
>35.2
0.0074
‐‐‐‐‐‐‐‐‐
1.10 1.16
1.1
17.5
14.6
1.5
‐‐‐‐‐‐‐‐‐
1.20
0.0060
1.27 1.27
F4 C4 C4
68.3
>2.20
‐‐‐‐‐‐
Table 8. Baseline Stream Data Summary
DMS Project No. 100060
Parameter
Riffle Only Min Max n Min Max Min Max n
Bankfull Width (ft)1 1
Floodprone Width (ft)1 1
Bankfull Mean Depth (ft)1 1
Bankfull Max Depth (ft)1 1
Bankfull Cross Sectional Area (ft2)11
Width/Depth Ratio 1 1
Entrenchment Ratio 1 1
Bank Height Ratio 1 1.0 1.2
Max part size (mm) mobilized at bankfull
Rosgen Classification
Bankfull Discharge (cfs)
Sinuosity
Water Surface Slope (ft/ft)2 ‐‐‐0.0032 0.0198
Other
Parameter
Riffle Only Min Max n Min Max Min Max n
Bankfull Width (ft)1 1
Floodprone Width (ft)1 1
Bankfull Mean Depth (ft)1 1
Bankfull Max Depth (ft)1 1
Bankfull Cross Sectional Area (ft2)11
Width/Depth Ratio 1 1
Entrenchment Ratio 1 1
Bank Height Ratio 1 1.0 1.2
Max particle size (mm) mobilized at bankfull
Rosgen Classification
Bankfull Discharge (cfs)
Sinuosity
Water Surface Slope (ft/ft)2 0.0084 0.0140 ‐‐‐0.0036 0.0251
Other
0.0270
0.8
1.0
7.1
9.9
80.0
0.8
1.3
1.2
2.1
8.1
0.0082
7.7
55.0
0.70
1.2
5.3
11.3
1.0
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
PRE‐EXISTING
CONDITIONS DESIGN MONITORING BASELINE
(MY0)
UT1
3.3 7.0
12.0 >15.4
0.63 0.57
4.0
5.2 12.3
3.7 >2.2
2.9
‐‐‐ ‐‐‐62.6
E4/F4 C4 C4
7.7 9.0 13.2
1.10 1.14 1.14
‐‐‐ ‐‐‐ ‐‐‐
UT2
2.9 9.0
6.3 >19.8
1.4 0.7
1.7
4.1 6.5
2.1 12.5
2.2 >2.2
2.5 1.0
12.2
8.1
‐‐‐ ‐‐‐77.4
F4 C4 C4
0.0081
‐‐‐ ‐‐‐ ‐‐‐
15 16 27
1.10 1.09 1.09
DMS Project No. 100060
Dimension Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7
Bankfull Elevation (ft) ‐ Based on AB‐Bankfull1 Area N/A N/A N/A N/A 473.58 473.79 473.84 473.83 465.71 465.83 465.83 465.82 N/A N/A N/A N/A
Bank Height Ratio ‐ Based on AB Bankfull1 Area N/A N/A N/A N/A 1.00 0.91 0.86 0.88 1.00 0.96 0.95 0.95 N/A N/A N/A N/A
Thalweg Elevation 470.62 470.67 470.65 470.65 472.04 472.21 472.26 472.23 464.27 464.27 464.30 464.25 461.58 461.68 461.62 461.49
LTOB2 Elevation 474.01 474.09 474.12 474.09 473.58 473.65 473.63 473.65 465.71 465.77 465.76 465.75 465.78 465.77 465.82 465.81
LTOB2 Max Depth (ft)3.39 3.42 3.47 3.44 1.54 1.44 1.37 1.42 1.44 1.50 1.46 1.50 4.19 4.09 4.20 4.32
LTOB2 Cross Sectional Area (ft 2)38.87 38.01 37.42 36.69 14.96 12.88 12.00 12.36 16.25 15.33 15.06 15.08 56.56 52.87 54.15 53.61
Dimension Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7 Base MY1 MY2 MY3 MY5 MY7
Bankfull Elevation (ft) ‐ Based on AB‐Bankfull1 Area 461.37 461.40 461.45 461.49 N/A N/A N/A N/A 469.34 469.39 469.51 469.57 459.29 459.34 459.47 459.50
Bank Height Ratio ‐ Based on AB Bankfull1 Area 1.00 1.08 1.09 1.09 N/A N/A N/A N/A 1.00 0.96 0.92 0.93 1.00 0.92 0.74 0.83
Thalweg Elevation 459.87 459.98 459.95 459.98 458.14 458.23 458.30 458.26 468.11 468.18 468.38 468.40 457.99 458.14 458.18 458.14
LTOB2 Elevation 461.37 461.51 461.58 461.63 461.17 461.18 461.23 461.22 469.34 469.34 469.42 469.48 459.29 459.24 459.14 459.27
LTOB2 Max Depth (ft)1.50 1.53 1.63 1.65 3.04 2.95 2.93 2.96 1.22 1.16 1.04 1.08 1.30 1.10 0.96 1.13
LTOB2 Cross Sectional Area (ft 2)13.91 15.57 15.87 15.96 38.67 34.55 34.22 33.20 5.25 4.86 4.54 4.53 8.12 7.14 5.07 5.89
1Bank Height Ratio (BHR) takes the As‐built bankful area as the basis for adjusting each subsequent years bankfull elevation.
Table 9. Morphology and Hydraulic Summary (Dimensional Parameters ‐ Cross‐Section)
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
Sandy Branch Reach 1 Sandy Branch Reach 2
Cross‐Section 1 (Pool)Cross‐Section 2 (Riffle)Cross‐Section 3 (Riffle)Cross‐Section 4 (Pool)
2LTOB Area and Max depth ‐ These are based on the LTOB elevation for each years survey (The same elevation used for the LTOB in the BHR calculation). Area below the LTOB elevation will be used and tracked for each year as above. The
difference between the LTOB elevation and the thalweg elevation (same as in the BHR calculation) will be recroded and tracked above as LTOB max depth.
Sandy Branch Reach 2 UT1 UT2
Cross‐Section 5 (Riffle)Cross‐Section 6 (Pool)Cross‐Section 7 (Riffle)Cross‐Section 8 (Riffle)
APPENDIX D. HYDROLOGY DATA
Reach MY1 (2021) MY2 (2022) MY3 (2023) MY4 (2024) MY5 (2025) MY6 (2026) MY7 (2027)
Sandy Branch
Reach 2
2/4/2021
10/9/2021
1/3/2022
3/16/2022
11/27/2022
2/12/2023
4/7/2023
4/30/2023
7/5/2023
7/9/2023
MY1 (2021) MY2 (2022) MY3 (2023) MY4 (2024) MY5 (2025) MY6 (2026) MY7 (2027)
Annual Precip
Total 47.37 42.49 32.39*
WETS 30th
Percentile 41.08 41.14 41.02
WETS 70th
Percentile 48.48 48.69 48.74
Normal YY*
*Annual precipitation was collected 1/1/2023 to 11/20/2023. Data from the remainder of MY3 will be updated in MY4.
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
Annual Precipitation Source: Siler City 7.2NE Station, Chatham County, NC, AgACIS, approximately 11‐mi. northwest.
30 Year Average Precipitation Source: Siler City 2N Station, Chatham County, NC, AgACIS, approximately 11‐mi. northwest.
Table 11. Rainfall Summary
Table 10. Bankfull Events
Sandy Branch Mitigation Site
DMS Project No. 100060
Monitoring Year 3 ‐ 2023
Table 12. Groundwater Gauge Summary
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
MY1 (2021) MY2 (2022) MY3 (2023) MY4 (2024) MY5 (2025) MY6 (2026) MY7 (2027)
1 50 days
(19.1%)
80 Days
(30.5%)
101 Days
(38.5%)
2 20 days
(7.6%)
25 Days
(9.5%)
26 Days
(9.9%)
3 19 days
(7.3%)
29 Days
(11.1%)
27 Days
(10.3%)
4 51 days
(19.5%)
82 Days
(31.3%)
98 Days
(37.4%)
5 55 days
(21%)
48 Days
(18.3%)
70 Days
(26.7%)
6 20 days
(7.6%)
31 Days
(11.8%)
23 Days
(8.8%)
7 61 days
(23.3%)
94 Days
(35.9%)
110 Days
(42.0%)
8 62 days
(23.7%)
82 Days
(31.3%)
106 Days
(40.5%)
9 51 days
(19.5%)
80 Days
(30.5%)
64 Days
(24.4%)
10 37 days
(14.1%)
43 Days
(16.4%)
37 Days
(14.1%)
11 40 days
(15.3%)
81 Days
(30.9%)
101 Days
(38.5%)
12 51 days
(19.5%)
56 Days
(21.4%)
72 Days
(27.5%)
13 *22 Days*
(8.4%)
101 Days
(38.5%)
14 *
10 Days*
(3.8%)
72 Days
(27.5%)
Gauge Max. Consecutive Hydroperiod (Percentage)
DMS Project No. 100060
WETS Station (Daily Rainfall): Siler City 7.2NE
WETS Station (30th & 70th Percentile): Siler City 2N, NC
Performance Standard: 27 Days (10%)
Growing Season: 3/1/2023 to 11/17/2023 (261 Days)
*GWGs 13 and 14 were installed on April 28, 2022 per IRT request.
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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101 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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8
9
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #1 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #1
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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26 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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6
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8
9
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‐30
‐20
‐10
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #2 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #2
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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27 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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6
7
8
9
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‐40
‐30
‐20
‐10
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #3 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #3
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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98 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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7
8
9
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‐30
‐20
‐10
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #4 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #4
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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70 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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3
4
5
6
7
8
9
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‐20
‐10
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #5 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #5
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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23 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #6 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #6
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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110 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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8
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #7 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #7
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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106 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #8 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #8
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #9 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #9
Transducer pulled by animal
on 5/3/2023
Corrected on 7/20/2023
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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37 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #10 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #10
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #11 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #11
101 max consecutive days
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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72 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #12 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #12
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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101 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #13 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #13
Groundwater Gauge Plot
Monitoring Year 3 ‐ 2023
Sandy Branch Mitigation Site
DMS Project No. 100060
St
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72 max consecutive days
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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Monitoring Year 3 ‐2023
Daily Precipitation Gauge #14 Criteria Level Soil Surface 30‐Day Rolling Precip Total 30th & 70th Percentile
Sandy Branch Groundwater Gauge #14
APPENDIX E. PROJECT TIMELINE AND CONTACT INFO
DMS Project No. 100060
DMS Project No. 100060
Construction Contractor
Main Stream Earthwork, Inc.
Reidsville, NC 27320
Table 14. Project Contact Table
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
Designer
Greg Turner, PE
Wildlands Engineering, Inc.
312 West Millbrook Road, Suite 225
Raleigh, NC 27609
919.851.9986
631 Camp Dan Valley Rd.
Monitoring, POC Jason Lorch
919.851.9986
Monitoring Performers Wildlands Engineering, Inc.
2027 December 2027Vegetation Survey 2027
Year 5 Monitoring Stream Survey 2025 December 2025Vegetation Survey 2025
Year 6 Monitoring December 2026
Year 7 Monitoring Stream Survey
Vegetation Survey August 2023
Year 4 Monitoring December 2024
Fescue Reduction April 2023Year 3 Monitoring December 2023
Vegetation Survey August 2022
Stream Survey March 2023
Year 1 Monitoring Stream Survey May 2021
Year 2 Monitoring
Stream Survey March 2022
April 2022Fescue Reduction
August 2021
Invasive Treatment February and August 2023
January 2021
As‐Built Survey Completed
Baseline Monitoring Document (Year 0)Stream Survey September 2020 April 2021Vegetation Survey January 2021
Table 13. Project Activity and Reporting History
Sandy Branch Mitigation Site
Monitoring Year 3 ‐ 2023
Activity or Deliverable Data Collection Complete Task Completion or Deliverable
Submission
December 2022
Project Instituted September 2017 September 2017
Mitigation Plan Approved December 2019 December 2019
September 2020 September 2020
Construction (Grading) Completed September 2020 September 2020
Planting Completed
December 2021Vegetation Survey
January 2021