20180180 Ver 1_Hollowell_MY4_USACE Report ALL_20231129

waterlandsolutions.com | 7721 Six Forks Rd, Ste 130, Raleigh, NC 27615 | 919-614-5111
November 29, 2023
US Army Corps of Engineers: Wilmington District
Raleigh Regulatory Field Office
Attn: Kim Isenhour
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
RE: Hollowell Mitigation Bank, WLS Neuse 01 Umbrella Bank – Sixth Credit Release Request (Monitoring
Year 4)
Dear Ms. Isenhour:
Water & Land Solutions (WLS) respectfully requests the sixth credit release and stream bankfull release
on the Hollowell Mitigation Project for 15% of the total stream and 5% of total wetland (non-preservation)
credits. This credit release amount would be 1,081.80 stream credits (360.60 for Task 6 and 721.20 for
bankfull) and 0.223 riparian wetland credits. Also included with this letter is the anticipated bank credit
release schedule per the USACE-Wilmington template and the WLS stream and wetland credit ledgers.
The following items have been completed regarding completion of Task 6: Monitoring Year 4 (MY4) Report
and the monitoring financial assurance (casualty insurance policy) is active. If you need any additional
information, please contact me directly.
Sincerely,
Cara Conder
Sr. Project Manager
7721 Six Forks Rd., Suite 130
Raleigh, NC 27615
Mobile Phone: [phone]
Email: [e-mail]
Project Name:
Sponsor Name:
USACE Action ID:
NCDWQ Action ID:
Non‐Forested 
Wetland 
Credits
Warm 
Water
Cool 
Water
Cold 
Water
Riparian 
Riverine
Riparian
Non‐Riverine Non‐Riparian Coastal
7,261 5.05
7,347 5.05
Scheduled 
Releases
Warm 
Water
Cool 
Water
Cold 
Water
Scheduled 
Releases
Riparian 
Riverine
Riparian
Non‐Riverine Non‐Riparian Scheduled 
Releases Coastal
1 (Bank/Site Establishment)1, 2 15% 1130.80 15% 1.170 15% 12/5/2019 12/19/2019 15% and all preservation credits
2 (Year 0/As‐Built)3 15% 1081.80 15% 0.690 15% 7/30/2020 8/18/2020
3 (Year 1 Monitoring)10% 721.20 10% 0.460 10% 1/15/2021 12/18/2020
4 (Year 2 Monitoring)10% 721.20 10% 0.457 15% 12/30/2021 12/14/2021
5 (Year 3 Monitoring)10% 721.20 15% 0.686 20% 12/30/2022 12/21/2022
6 (Year 4 Monitoring)5% 360.60 5% 0.223 10% 12/30/2023
7 (Year 5 Monitoring)10% 721.20 15% 0.686 15% 12/30/2024
8 (Year 6 Monitoring)5% 360.60 5% 0.223 NA NA 12/30/2025
9 (Year 7 Monitoring)10% 721.20 10% 0.457 NA NA 2/28/2027
Stream Bankfull Standard4 10% 721.20 NA NA NA NA NA NA Varies4
Total Credits Release to Date
Date
Wayne
03020201
2018
11/21/2023
County:
8‐Digit HUC:
Year Project Instituted:
Date Prepared:
Actual Release 
Date
Potential Credits from As‐Built Survey
Stream Credits
Credit Classification
Non‐Forested Wetland 
CreditsForested Wetland CreditsStream Credits
Current and Future Credit Releases
Credit Release Milestone
Wilmington District Mitigation Bank Credit Release Schedule
4 ‐ A 15% reserve of credits to be held back until the bankfull event performance standard has been met.
1 ‐ The first credit release milestone is based on the potential credits stated in the approved mitigation plan.
2 ‐ The first credit release shall occur upon establishment of the mitigation bank, which includes the following criteria:
      1) Execution of the MBI or UMBI by the Sponsor and the USACE;
      2) Approval of the final Mitigation Plan;
      3) Mitigation bank site must be secured;
      4) Delivery of the financial assurances described in the Mitigation Plan;
      5) Recordation of the long‐term protection mechanism and title opinion acceptable to the USACE;
      6) 404 permit verification for construction of the site, if required.
3 ‐ The second credit release is based on the credit totals from the as‐built survey, and may differ slightly from the credit totals stated in the mitigation plan.
Contingencies (if any): None
Signature of Wilmington District Official Approving Credit Release
Hollowell (WLS Neuse 01 UMB)
Water & Land Solutions, LLC
SAW‐2017‐00159
2018‐0180v1
Potential Credits from Mitigation Plan
Forested Wetland Credits
Total Potential Credits 
Projected 
Release Date
Credits
Reserved
12/19/2019 1,130.80
8/19/2020 1,081.80
12/18/2020 721.20
4/26/2021 114.00 Sherrill Farm, LLC Sherrill Farm Subdivision-Phase 2 SAW-2017-00808
12/14/2021 721.20
3/8/2022 38.00 Town of Holly Springs Holly Springs Road Widening-Phase 2 SAW-2020-00216
7/6/2022 608.00 D.R. Horton Jessie Drive Extension & Horton Park SAW-2020-00797
9/22/2022 721.00 Pulte Home Company, LLC Solana SAW-2019-01458
12/21/2022 721.20
11/6/2023 204.00 Ashton Raleigh Residential, LLC The Point Phase 2 SAW-2008-00871
Total 4,376.20 1,685.00 2,691.20 0.00
Task 5 Credit Release: Monitoring Year 3
Sale/Release
Date
Credits Released to
Bank
Credits Debited from
Bank
Current Credit
Balance Purchaser Project
Task 4 Credit Release: Monitoring Year 2
Task 3 Credit Release: Monitoring Year 1
Task 2 Credit Release: As-Built Baseline
Permit Number
Task 1 Credit Release and Preservation Credits
WLS Neuse 01 Umbrella Mitigation Bank
HOLLOWELL STREAM CREDIT LEDGER (HUC 03020201), SAW-2017-00159
Warm Stream Credits
As of 11/21/2023
Credits
Reserved
12/19/2019 1.170
8/19/2020 0.690
12/18/2020 0.457
4/26/2021 0.11 Sherrill Farm, LLC Sherrill Farm Subdivision-Phase 2 SAW-2017-00808
7/26/2021 0.233 Lennar Homes Jasper Place SAW-2020-01464
7/29/2021 0.18 NDS Properties, LLC Barbour Farms Subdivision SAW-2018-0220
12/14/2021 0.457
12/28/2021 0.448 Samet Corporation US Buiness 70/Fleming Site SAW-2020-02238
2/16/2022 0.440 Daniel-Lan Development, LLC Daniel Farms North SAW-2015-01037
3/2/2022 0.340 The Halle Companies Sunnybrook Apartments SAW-2021-00812
7/14/2022 0.120 BCE Real Estate Holdings, LLC Carson Landing Subdivision SAW-2022-00945
7/25/2022 0.266 Lennar Homes Corporation Jasper Place SAW-2020-01464
8/8/2022 0.010 River Dell Company, Inc Village at Flowers Plantation SAW-2008-01712
8/11/2022 0.061 Meritage Homes New Bethel (Ferguson)SAW-2018-01947
9/23/2022 0.28 Parkway Properties Group, LLC Knightdale Rivers Edge SAW-2021-02113
12/21/2022 0.686
1/4/2023 0.36 Allan E. Metzner Princeton Kenly Road SAW-2022-01768
3/8/2023 0.05 Johnston County S. Selma Regional Pump Station and Force Main SAW-2022-00510
Total 3.460 2.898 0.562 0.00
Task 5 Credit Release: Monitoring Year 3
Permit Number
WLS Neuse 01 Umbrella Mitigation Bank
HOLLOWELL WETLAND CREDIT LEDGER (HUC 03020201), SAW-2017-00159
Riparian Wetland Credits
As of 11/21/2023
Task 3 Credit Release: Monitoring Year 1
Task 2 Credit Release: As-Built Baseline
Task 4 Credit Release: Monitoring Year 2
Sale/Release
Date
Credits Released to
Bank
Credits Debited from
Bank
Current Credit
Balance Purchaser
Task 1 Credit Release and Preservation Credits
Project
Monitoring Report – MY4
Hollowell Mitigation Project
WLS Neuse 01 Umbrella Mitigation Bank
Monitoring Year 4
Calendar Year of Data Collection: 2023
Private Commercial Mitigation Bank for
Stream and Riparian Wetland Compensatory Mitigation Credits
Neuse River Basin (CU 03020201)
USACE Action ID Number: SAW-2017-00159
Wayne County, NC
Data Collection Period: April, October, and November 2023
Submission Date: November 2023
Prepared for:
U.S. Army Corps of Engineers, Wilmington District
69 Darlington Avenue
Wilmington, North Carolina 28403-1343
Prepared by:
Table of Contents
1 Project Summary ................................................................................................................................... 1
1.1 Project Location and Description .................................................................................................. 1
1.2 Project Goals and Objectives ........................................................................................................ 1
1.3 Project Success Criteria ................................................................................................................. 2
1.3.1 Single-Thread Streams .......................................................................................................... 2
1.3.2 Headwater Streams .............................................................................................................. 3
1.3.3 Wetlands ............................................................................................................................... 4
1.3.4 Vegetation ............................................................................................................................. 4
1.3.5 Visual Assessment ................................................................................................................. 4
2 Project Mitigation Components ............................................................................................................ 5
2.1 Project Components ..................................................................................................................... 5
3 Monitoring Year 4 Assessment and Results .......................................................................................... 5
3.1 Morphological Assessment ........................................................................................................... 6
3.1.1 Stream Horizontal Pattern & Longitudinal Profile ................................................................ 6
3.1.2 Stream Horizontal Dimension ............................................................................................... 6
3.2 Stream Hydrology ......................................................................................................................... 6
3.2.1 Stream Flow .......................................................................................................................... 6
3.2.2 Bankfull Events ...................................................................................................................... 6
3.2.3 Headwater Stream Channel Formation ................................................................................ 6
3.2.4 Wetland Hydrology ............................................................................................................... 7
3.3 Vegetation ..................................................................................................................................... 7
4 Methods ................................................................................................................................................ 8

LIST OF APPENDICES
Appendix A Background Tables
Table 1 Project Mitigation Components
Table 2 Project Activity and Reporting History
Table 3 Project Contacts
Table 4 Project Information and Attributes

Appendix B Visual Assessment Data
Figure 1 a & 1b Current Condition Plan View (CCPV)
Photos Stream Station Photos
Vegetation Plot Photographs
Additional Photos

Appendix C Vegetation Plot Data
Table 5a Planted and Total Stem Counts
Table 5b Vegetation Plot Mitigation Success Summary
Table 5c Red-line Planting List

Appendix D Stream Measurement and Geomorphology Data
Table 6a Baseline Stream Data Summary
Table 6b Cross-section Morphology Data
Table 6c Stream Reach Morphology Data
Table 6d Evidence of Headwater Channel Formation

Appendix E Hydrologic Data
Table 7 Verification of Bankfull Events
Figure 2 Surface Flow Data
Figure 3 Flow Gauge and Crest Gauge Installation Diagram
Figure 4 Rainfall Data
Figure 5 Wetland Gauge Data

Appendix F Correspondence
MY3 Credit Release Comment Response

1

1 Project Summary
1.1 Project Location and Description
Water and Land Solutions, LLC (WLS) completed the construction and planting of the Hollowell Mitigation
Project (Project) in April 2020. The Project is located approximately seven miles southwest of Goldsboro
in Wayne County, NC (35.35814, -78.11642), in the Neuse River Basin 8-digit HUC 03020201 and NC
Department of Environmental Quality (NCDEQ) sub-basin 03-04-02 (Warm Water Thermal Regime). The
Project is a site within the WLS Neuse 01 Umbrella Mitigation Bank. This sub-basin spans portions of
Johnston and Wayne Counties and includes the municipalities of Goldsboro, Selma, Pine Level, Mount
Olive and Princeton.
The Project involved the restoration, enhancement, preservation, and permanent protection of eight
stream reaches totaling approximately 8,979 linear feet, and the preservation, re-establishment, and
enhancement of riparian wetlands totaling 10.52 acres. The Project also results in nutrient offset credits,
riparian buffer restoration, and buffer preservation through the Division of Water Resources. The Project
will provide significant ecological improvements and functional uplift through stream and aquatic habitat
restoration, and through decreasing nutrient and sediment loads within the watershed. Figures 1a and 1b
illustrate the project mitigation components.
Monitoring Year 4 (MY4) activities occurred during April, October, and November 2023. This report
presents the data for MY4. The Project meets the MY4 success criteria for stream hydrology, stream
horizontal and vertical stability, stream flow, and vegetation. One of the seven wetland gauges is not
meeting the 12 to 16 percent hydroperiod criteria. Based on these results, the Project is on trajectory to
meet interim and final success criteria. For more information on the chronology of the project history and
activity, refer to Appendix A, Table 2. Relevant project contact information is presented in Appendix A,
Table 3 and project background information is presented in Appendix A, Table 4.
1.2 Project Goals and Objectives
The Project will meet the goals and objectives described in the Hollowell Final Approved Mitigation Plan
and will address general restoration goals and opportunities outlined in the NC DMS Neuse River Basin
RBRP (DEQ 2010). More specifically, watershed goals and management strategies will be met by:
 Reducing sediment, soil erosion, turbidity, and nutrient inputs such as nitrogen and phosphorus
to the Neuse River Watershed.
 Restoring, enhancing, preserving, and protecting headwater streams, wetlands, riparian buffers
and aquatic habitat functions.
 Improving riparian corridor management and targeting restoration of impacted streams and
riparian buffer areas.
 Promoting agronomic farm management techniques and implementing agricultural BMPs and
water quality features, such as nutrient management and wetlands restoration.
To accomplish these project-specific goals, the following objectives will be measured to document overall
project success:

2

 Provide a floodplain connection to the incised Project stream reaches by lowering bank height
ratios (BHRs) to less than 1.2, thereby promoting a more natural headwater flow regime and
overbank flood flows.
 Improve bedform diversity by increasing scour pool spacing and depth variability.
 Increase native species riparian buffer and wetland vegetation density/composition along
streambank and floodplain areas that meet requirements of a minimum 50-foot-wide and 210
stems/acre after the monitoring period.
 Improve aquatic habitat and fish species diversity and migration through the addition of in-stream
cover and native woody debris.
Site protection is provided by a 72-acre conservation easement with a minimum width of 50 feet from the
top of the restored stream banks. The easement protects all project streams, wetlands, and aquatic
resources in perpetuity.

1.3 Project Success Criteria
The success criteria for the Project follows the approved performance standards and monitoring protocols
from the final approved mitigation plan, which was developed in compliance with the USACE October
2016 Guidance, USACE Stream Mitigation Guidelines (April 2003 and October 2005), and 2008
Compensatory Mitigation Final Rule. Cross-section and vegetation plot data will be collected in Years 0, 1,
2, 3, 5, and 7. Stream hydrology data, wetland hydrology, and visual monitoring will be reported annually.
Specific success criteria components and evaluation methods are described below.
1.3.1 Single-Thread Streams
Stream Hydrology: Four separate bankfull or over bank events must be documented within the seven-
year monitoring period, and the stream hydrology monitoring will continue until four bankfull events have
been documented in separate years. Stream hydrology monitoring will be accomplished with pressure
transducers installed in pools and correlating sensor depth to top of bank elevation. Recorded water depth
above the top of bank elevation will document a bankfull event. In addition to the pressure transducers,
traditional cork gauges will be installed at bankfull elevation and will be used to document bankfull events
with photographs.
Stream Profiles, Vertical Stability, and Floodplain Access: Stream profiles, as a measure of vertical
stability and floodplain access, will be evaluated by looking at Bank Height Ratios (BHR). In addition,
observed bedforms should be consistent with those observed for channels of the design stream type(s).
The BHR shall not exceed 1.2 along the restored Project stream reaches. This standard only applies to
restored reaches of the channel where BHRs were corrected through design and construction. Vertical
stability will be evaluated with visual assessment, cross sections and, if directed by the IRT, longitudinal
profile.
Stream Horizontal Stability: Cross-sections will be used to evaluate horizontal stream stability on restored
streams. There should be little change expected from as-built restoration cross-sections. If measurable
changes do occur, they should be evaluated to determine if the changes represent a movement toward a
more unstable condition (e.g., downcutting, erosion) or a movement towards increased stability (e.g.,
settling, vegetation establishment, deposition along the streambanks, decrease in width/depth ratio).
Cross-sections shall be classified using the Rosgen Stream Classification method, and all monitored cross-
sections should fall within the quantitative parameters defined for channels of the design stream type.

3

Reference photo transects will be taken at each permanent cross-section. Lateral photos should not
indicate excessive erosion or continuing degradation of the streambanks. Photographs will be taken of
both streambanks at each cross-section. A survey tape stretched between the permanent cross-section
monuments/pins will be centered in each of the streambank photographs. The water elevation will be
shown in the lower edge of the frame, and as much of the streambank as possible will be included in each
photo. Photographers will attempt to consistently maintain the same area in each photo over time.
Streambed Material Condition and Stability: Pebble counts or streambed material samples will not be
collected per the IRT. The IRT reserves the right to request pebble count data/particle distributions if
deemed necessary during the monitoring period.
Jurisdictional Stream Flow: Monitoring of stream flow will be conducted to demonstrate that the restored
stream systems classified as intermittent exhibit surface flow for a minimum of 30 consecutive days
throughout some portion of the year during years with normal or below normal rainfall conditions. Stream
flow monitoring will be accomplished with pressure transducers installed in pools and correlating sensor
depth to the downstream top of riffle elevation. If the pool water depth is at or above the top of riffle
elevation, then the channel will be assumed to have surface flow (Figure 3). The devices will record water
elevation twice per day and will be inspected quarterly to document surface hydrology and provide a basis
for evaluating flow response to rainfall events.
1.3.2 Headwater Streams
Seasonal Flow: Surface flow must be documented using automatic pressure transducers (flow
gauges). Continuous surface water flow within the valley or crenulation must be documented to occur
every year for at least 30 consecutive days during the prescribed monitoring period. This will be
accomplished in the same approach as Jurisdictional Stream Flow above.

Channel Formation: During monitoring years 1 through 4, the preponderance of evidence must
demonstrate a concentration of flow indicative of channel formation within the topographic low-point of
the valley or crenulation as documented by the following indicators:

 Scour (indicating sediment transport by flowing water)
 Sediment deposition (accumulations of sediment and/or formation of ripples)
 Sediment sorting (sediment sorting indicated by grain-size distribution with the primary path of
flow)
 Multiple observed flow events (must be documented by gauge data and/or photographs)
 Destruction of terrestrial vegetation
 Presence of litter and debris
 Wracking (deposits of drift material indicating surface water flow)
 Vegetation matted down, bent, or absent (herbaceous or otherwise)
 Leaf litter disturbed or washed away
During monitoring years 5 through 7, the stream must successfully meet the requirements above and the
preponderance of evidence must demonstrate the development of stream bed and banks as documented
by the following indicators:

4

 Bed and banks (may include the formation of stream bed and banks, development of channel
pattern such as meander bends and/or braiding at natural topographic breaks, woody debris, or
plant root systems)
 Natural line impressed on the bank (visible high-water mark)
 Shelving (shelving of sediment depositions indicating transport)
 Water staining (staining of rooted vegetation)
 Change in plant community (transition to species adapted for flow or inundation for a long
duration, including hydrophytes)
 Changes in character of soil (texture and/or chroma changes when compared to the soils abutting
the primary path of flow)
1.3.3 Wetlands
Wetland Hydrology: The performance standard for wetland hydrology will be a minimum 12 to 16 percent
based on the suggested wetland saturation thresholds for soils’ taxonomic subgroups provided by the IRT
and on-site wetland reference data. The proposed success criteria for wetland hydrology will be when the
soils are saturated within 12 inches of the soil surface for 12 to 16 percent (27 to 36 days) of the growing
season (March 21 through November 6) based on the WETS data table for Wayne County, NC. The
saturated conditions should occur during a period when antecedent precipitation has been normal or
drier than normal for a minimum frequency of 5 years in 10 (USACE, 2005 and 2010b). Precipitation data
will be obtained from the Cherry Research Station near Goldsboro (GOLD), which is approximately 4 miles
east from the Project site, and a rain gauge was installed on site.
1.3.4 Vegetation
Vegetation monitoring will occur in the fall each required monitoring year, typically prior to leaf drop.
Plots will be monitored in years 0, 1, 2, 3, 5, and 7. Vegetative success for the Project during the
intermediate monitoring years will be based on the survival of at least 320, three-year-old stems per acre
at the end of Year 3 of the monitoring period, and at least 260, five-year-old stems per acre that must
average six feet in height at the end of Year 5 of the monitoring period. The final vegetative restoration
success criteria will be achieving a density of no less than 210, seven-year-old stems per acre that must
average eight feet in height in Year 7 of monitoring.
1.3.5 Visual Assessment
WLS will conduct visual assessments in support of mitigation performance monitoring. Visual assessments
of all stream reaches will be conducted twice per monitoring year with at least five months in between
each site visit for each of the seven years of monitoring. Photographs will be used to visually document
system performance and any areas of concern related to streambank and bed stability, condition of in-
stream structures, channel migration, active headcuts, live stake mortality, invasive plant species or
animal browsing, easement boundary encroachments, cattle exclusion fence damage, and general
streambed conditions. Permanent photo points are at the cross-sections, culvert crossings, and
Enhancement II reaches.

5

2 Project Mitigation Components
2.1 Project Components
The Project mitigation components include a combination of Stream Restoration, Enhancement, and
Preservation activities, as well as Riparian Wetland Restoration (Re-establishment), Enhancement, and
Preservation activities, as summarized in the table below.
Table 1. Mitigation Plan Stream Mitigation Credits (SMCs)
Project Reach
Designation Type of Mitigation
Existing
Stream Length
(LF)
Proposed
Stream
Length (LF)
Ratio
Stream
Mitigation
Credits (SMCs)
UT1-R1 Stream Restoration (HW/PI) 2,151 2,131 1:1 2,131
UT1-R2 Stream Restoration (PI) 1,777 2,007 1:1 2,007
UT2-R1 (upper) Stream Preservation 228 228 10:1 23
UT2-R1 (lower) Stream Restoration (HW/PI) 615 615 1:1 615
UT2-R2 Stream Restoration (PI/PII) 1,151 1,151 1:1 1,151
UT2-R3 Stream Enhancement Level II 1,923 1,923 3:1 641
UT2A Stream Restoration (HW/PI) 667 667 1:1 667
UT2B Stream Preservation 257 257 10:1 26
Totals 8,769 8,979 7,261
Note 1: No mitigation credits were calculated outside the conservation easement boundaries.
Note 2: Headwater (HW) stream credits calculated using valley length.

Table 1b. Mitigation Plan Wetland Mitigation Credits (WMCs)
Project Wetland
Area Type of Mitigation
Proposed
Wetland Acreage
(AC)
Ratio
Riparian Wetland
Mitigation Credits
(WMCs)
W1 Wetland Preservation 2.30 10:1 0.23
W2 Wetland Preservation 2.49 10:1 0.25
W2a Wetland Re-establishment 1.59 1:1 1.59
W3 Wetland Enhancement 0.84 3:1 0.28
W3a Wetland Re-establishment 0.77 1:1 0.77
W4 Wetland Enhancement 0.90 3:1 0.30
W4a Wetland Re-establishment 1.63 1:1 1.63
Totals 10.52 5.05

3 Monitoring Year 4 Assessment and Results
The dates of Year 4 monitoring activities are detailed in Appendix A, Table 2. All Year 4 monitoring data is
presented in this report and in the appendices. The Project is on track for meeting stream, wetland, and
vegetation success criteria. All monitoring device locations are depicted on the CCPV (Figures 1a and 1b).

6

3.1 Morphological Assessment
3.1.1 Stream Horizontal Pattern & Longitudinal Profile
Visual assessment was utilized for assessment of MY4 horizontal and vertical stream stability. The visual
assessments for each stream reach document MY4 stream channel pattern and longitudinal profiles, and
in-stream structure location/function, which align with the profile design parameters and MY0/baseline
conditions (Appendix D). The MY4 planform geometry and dimensions fall within acceptable ranges of the
design parameters for all restored reaches. Minor channel adjustments in riffle slopes, pool depths, and
pattern were observed based on appropriate sediment transport and stream bank vegetation
establishment.
3.1.2 Stream Horizontal Dimension
Cross-section surveys were not required for MY4 per the mitigation plan. They will be completed in MY5.
3.2 Stream Hydrology
3.2.1 Stream Flow
The flow gauges on UT1-R2 and UT2-R2 document that the stream exhibited surface flow for a minimum
of 30 consecutive days throughout the monitoring year (Appendix E, Figure 2). Additionally, to determine
if rainfall amounts are normal for the given year, precipitation data was obtained from the onsite rain
gauge installed near UT2-R2 and compared with data from the North Carolina Climate Office from a
weather station located at Cherry Research Station, approximately four miles east of the site. Rainfall has
generally been within normal limits during MY4, however April and August rainfall totals exceeded normal
limits.
Flow Gauge Data
Flow
Gauge
Name
Flow
Gauge
Location
Longest Period of
Consecutive Flow
Total Days of
Cumulative
Flow
Total
Days of
No Flow
Longest Period of
Consecutive No Flow
FG-1 UT1-R1 69 days
2/11/2023 – 4/20/2023 129 days 146 days 28 days
FG-2 UT2-R1 271 days
1/1/2023 – 9/28/2023 271 days 0 days 0 days

3.2.2 Bankfull Events
During MY4, bankfull events were recorded on both pressure transducers. UT1-R2 gauge recorded six
events with a maximum event of 0.527 feet above bankfull elevation occurring on September 23rd, 2023.
UT2-R2 gauge recorded 13 events with a maximum event of 0.65 feet above bankfull occurring on July
14th, 2023. The associated data is in Appendix E.
3.2.3 Headwater Stream Channel Formation
During MY4, streams UT1-R1, UT2-R1 and UT2A all exhibited significant evidence indicative of channel
formation within the topographic low-point of the valley. See Table 6d in Appendix D for channel
formation documentation.

7

3.2.4 Wetland Hydrology
Data for the eight groundwater wells installed is available in Appendix E. Seven out of the eight wells are
in creditable wetland areas. The remaining well (Groundwater Well 1) is adjacent to UT1-R2 to document
fluctuations in the hyporheic zone and is not documenting a wetland area. Six of the seven wetland
groundwater wells met the wetland saturation thresholds of 12 to 16 percent during the growing season.
Groundwater well 8 (WG-8 in W1) had a hydroperiod of 3.03 percent for MY4 but has exceeded the 12
percent criterion in all previous monitoring years. Groundwater well locations are shown on Figures 1a
and 1b.
3.3 Vegetation
Vegetation plot surveys were not required but were surveyed in MY4 due to overlap with DWR plots, and
all plots exceeded stem density requirements. Results of MY4 vegetation plot surveys are reflected in
Appendix C. The overall average planted stems per acre was 469, with individual plot planted stems
ranging from 324-809 and an average stem height of four feet. Planned surveys will continue in MY5.
Additional MY4 vegetation monitoring was conducted utilizing visual assessment throughout the
easement. Two vegetation problem areas (VPA) were identified during MY2 visual assessments. VPA-1
was approximately 0.52 acres in size, and this area encompassed vegetation plot 4. This area experienced
rutting and damage from feral hogs which moved through the site during MY2. The landowner has been
made aware of the feral hogs. On December 7th, 2021, this area was planted with 100 tulip poplars, 50
river birches, and 20 swamp chestnut oaks. Herbaceous vegetation has reestablished. No additional areas
of damage were found during visual assessment of VPA-1. VPA-2 was approximately 0.39 acres in size and
was located in W2a. This area is extremely wet and has thick wetland herbaceous vegetation that had
negatively impacted tree survival in the area. VPA-2 was supplementally planted on December 7th, 2021,
with 100 cypress (Taxodium distichum) and 100 swamp tupelos (Nyssa biflora). During MY3 and MY4
visual assessment, planted stems were establishing well. Both VPAs have been removed in MY4.
Three areas of landowner encroachment were identified in MY2 in the conservation easement area.
Please note that visual estimates of all three encroachment areas overestimated the acreage in the MY2
report. Subsequent GPS mapping of the encroachment areas is reflected in the acreages provided below.
One area was located along the easement near Wetland 4 (W4) and was approximately 0.17 acres. The
second area was along the easement near UT2-R1 and was approximately 0.09 acres. The third area was
along the easement by UT2-R3 and was approximately 0.01 acres. All encroachments were a result of
mowing vegetation along the easement boundary due to farming activities.
All encroachment areas were marked with additional t-posts and signs on December 14th, 2021. The
easement was originally marked per the signage every 150 ft, and additional signs have been added. String
and flagging tape were also used to demarcate the boundary. The encroachments near Wetland 4 (0.17
ac) and UT2-R1 (0.09 ac) were replanted on December 7th, 2021, with 150 bare root trees. The 0.01-acre
encroachment near UT2-R3 was not replanted and was marked with additional signs and string. The 0.01-
acre encroachment is less than a foot into the easement and mowed herbaceous vegetation, but did not
harm any planted trees. The marked easement line/t-posts are 6-12 inches outside the conservation
easement boundary. Since additional marking and planting have been completed, encroachments have
ceased and vegetation has re-established, therefore these three encroachments have been removed in
MY4.

8

A significant population of privet (Ligustrum sinense) was located along the headwater restoration portion
of UT1-R1 prior to construction. Construction activities removed the existing privet within the easement.
No treatments of invasive species were conducted during MY4. The easement will be closely monitored
during MY5, and re-sprouts will be treated as needed to prevent further establishment. Any subsequent
vegetation management for problem or invasive species will be included in the MY5 report.
4 Methods
Stream cross-section monitoring is conducted using a Topcon Total Station. Morphological data are
collected at 11 cross-sections. Survey data are imported into Microsoft Excel® for data processing and
analysis. The stage recorders include an automatic pressure transducer (HOBO Water Level (13 ft) Logger)
set in PVC piping in the channel. The elevation of the bed and top of bank at each stage recorder location
was recorded to be able to document presence of water in the channel and out of bank events. Visual
observations (i.e. wrack or debris lines) and traditional cork crest gauges were also used to document out
of bank events.
Vegetation success is being monitored at a total of 24 permanent vegetation plots. Vegetation plot
monitoring follows the CVS-EEP Level 2 Protocol for Recording Vegetation, version 4.2 (Lee et al. 2008)
and includes analysis of species composition and density of planted species. Data are processed using the
CVS data entry tool. In the field, the four corners of each plot were permanently marked with PVC at the
origin and rebar at the other corners. Tree species and height will be recorded for each planted stem, and
photos of each plot are to be taken from the origin each monitoring year.
Wetland hydrology is monitored to document success in wetland re-establishment and enhancement
areas where hydrology was affected. This is accomplished with eight automatic pressure transducer
gauges (located in groundwater wells) that record daily (twice per day) groundwater levels. Pressure
transducers are HOBO Water Level (13ft) Data Loggers made by Onset. Seven data loggers have been
installed within the wetland crediting area, and one was installed adjacent to UT1-R2 to document
fluctuations in the hyporheic zone. Of the seven located in the credited areas, two are installed within a
reference wetland area. One automatic pressure transducer is installed above ground for use as a
barometric reference. Gauges are downloaded quarterly, and wetland hydroperiods are calculated during
the growing season. Gauges are downloaded using a data download shuttle (Onset HOBO U-DTW-1
Waterproof Shuttle Data Transporter). Gauge installation followed current regulatory guidance. Visual
observations of primary and secondary wetland hydrology indicators are also recorded during quarterly
site visits.

Appendix A:
Background Tables
Table 1: Project Mitigation Components
Table 2: Project Activity and Reporting History
Table 3: Project Contacts
Table 4: Project Information and Attributes
Existing Mitigation
Footage Plan As-Built
or Footage or Mitigation Restoration Priority Mitigation Footage or
Acreage Acreage Category Level Level Ratio (X:1) Acreage Comments
UT1-R1 2,151 2,131 Warm R HW/PI 1.00000 2,167
Full Channel Restoration, Planted Buffer, Permanent Conservation Easement
UT1-R2 1,777 2,007 Warm R PI 1.00000 2,009 Full Channel Restoration, Planted Buffer, Permanent Conservation Easement
UT2-R1 (upper) 228 228 Warm P N/A 10.00000 218 Preservation, Permanent Conservation Easement
UT2-R1 (lower) 615 615 Warm R HW/PI 1.00000 633 Full Channel Restoration, Planted Buffer, Permanent Conservation Easement
UT2-R2 1,151 1,151 Warm R PI/PII 1.00000 1,177
Dimension and Profile modified in keeping with reference, Planted Buffer,
Permananent Conservation Easement
UT2-R3 1,923 1,923 Warm EII N/A 3.00000 1,941
Supplmentally Planted Buffer, Removed abandoned culvert, Permenant
Conservation Easement
UT2A 667 667 Warm R HW/PI 1.00000 665 Full Channel Restoration, Planted Buffer, Permanent Conservation Easement
UT2B 257 257 Warm P N/A 10.00000 267 Preservation, Permanent Conservation Easement
W1 2.300 2.300 RR P 10.00000 2.300 Permanent Conservation Easement
W2 2.490 2.490 RR P 10.00000 2.490 Permanent Conservation Easement
W2a N/A 1.590 RR RE 1.00000 1.590 Limited soil manipulation, Restored groundwater hydrology, Planting
W3 0.840 0.840 RR E 3.00000 0.840 Restored hydrology and Planting
W3a N/A 0.770 RR RE 1.00000 0.770 Limited soil manipulation, Restored groundwater hydrology, Planting
W4 0.900 0.900 RR E 3.00000 0.900 Restored hydrology and Planting
W4a N/A 1.630 RR RE 1.00000 1.630 Limited soil manipulation, Restored groundwater hydrology, Planting
Non-Rip Coastal
Warm Cool Cold Riverine Non-Riv
Wetland Marsh
Restoration 6571.000
Re-establishment 3.990
Rehabilitation
Enhancement 0.580
Enhancement I
Enhancement II 641.000
Creation
Preservation 48.500 0.479
Totals 7,261 5.05 0.000 0.000
Project Credits
Restoration Level
Stream Riparian Wetland
Table 1.  Hollowell Mitigation Project (SAW‐2017‐00159)  ‐ Mitigation Assets and Components
Project Segment
Elapsed Time Since grading complete:
Elapsed Time Since planting complete:
Number of reporting Years1:
Data Collection Completion or
Activity or Deliverable Complete Delivery
Institution Date N/A 7/26/2018
404 permit date N/A 10/22/2019
Restoration Plan N/A 8/1/2019
Final Design – Construction Plans N/A 8/16/2019
Construction N/A 4/21/2020
Containerized, bare root and B&B plantings for reach/segments N/A 4/24/2020
As-built (Year 0 Monitoring – baseline) April-May 2020 7/1/2020
Year 1 Monitoring 10/30/2020 11/6/2020
Year 2 Monitoring 10/8/2021 10/22/2021
Year 3 Monitoring 10/11/2022 11/3/2022
Year 4 Monitoring 11/21/2023 11/29/2023
Year 5 Monitoring
Year 6 Monitoring
Year 7 Monitoring/ Close Out
Replanting Encroachment/wetland area MY3 N/A 12/7/2021
Table 2. Project Activity and Reporting History
Hollowell Mitigation Project (SAW-2017-00159)
3 year 7 months
3 year 7 months
4
Designer Water & Land Solutions, LLC
7721 Six Forks Rd, Suite 130, Raleigh, NC 27615
Primary project design POC Kayne Van Stell Phone: [phone]
Construction Contractor Wright Contracting, LLC
PO Box 545, Siler City, NC 27344
Construction contractor POC Ross Kennedy Phone: [phone]
Survey Contractor WithersRavenel
115 MacKenan Drive, Cary, NC 27511
Survey contractor POC Marshall Wight Phone: [phone]
Planting Contractor Ripple EcoSolutions, LLC
215 Moonridge Road, Chapel Hill, NC 27516
Planting contractor POC George Morris Phone: [phone]
Seeding Contractor Wright Contracting, LLC
PO Box 545, Siler City, NC 27344
Contractor point of contact Ross Kennedy Phone: [phone]
Seed Mix Sources Green Resource
[phone]
Nursery Stock Suppliers (Bare Roots)Native Forest Nursery Phone: [phone]
Nursery Stock Suppliers (Bare Root/plugs)Mellow Marsh Farm Phone: [phone]
Nursery Stock Suppliers (Live Stakes)Foggy Mountain Nursery Phone: [phone]
Monitoring Performers Water & Land Solutions, LLC
7721 Six Forks Rd, Suite 130, Raleigh, NC 27615
Stream Monitoring POC Leah Farr Phone: [phone]
Vegetation Monitoring POC Leah Farr Phone: [phone]
Wetland Monitoring POC Leah Farr Phone: [phone]
Table 3. Project Contacts Table
Hollowell Mitigation Project (SAW-2017-00159)
USGS Hydrologic Unit 8-digit 03020201
Reach UT2-R1
(upper)
Reach UT2-R1
(lower)Reach UT2-R2 Reach UT2-R3 Reach UT2A Reach UT2B
228 615 1,151 1,923 667 257
unconfined unconfined unconfined unconfined unconfined unconfined
45 ac and 0.070
sq mi N/A 256 ac and 0.400
sq mi
512 ac and 0.800
sq mi
69 ac and 0.108
sq mi
306 ac and 0.478
sq mi
Intermittent Intermittent Perennial Perennial Intermittent Perennial
C, WS-IV C, WS-IV C, WS-IV C, WS-IV C, WS-IV C, WS-IV
E5 (incised) E5 (incised) E5 (incised) E5 E5 (incised) E5
DA/E5 DA/E5 E5/C5 N/A DA N/A
IV/V IV/V IV/V IV/V V V
N/A N/A AE AE N/A AE
W2a W3 W3a W4 W4a
1.59 0.84 0.77 0.9 1.63
RR RR RR RR RR
We KaD, Po Po, AyA Ke, Lv Ke, Lv, To
poorly drained
moderatly well
drained, very
poorly drained
very poorly
drained, well
drained
well drained,
poorly drained
well drained,
poorly drained,
very poorly
drained
Hydric Non-Hyrdric,
Hydric Hydric, Non-Hydric Non-Hydric,
Hydric
Non-Hydric,
Hydric, Hydric
Groundwater,
Surface
Hydrology
Groundwater,
Surface
Hydrology
Groundwater,
Surface Hydrology
Groundwater,
Surface
Hydrology
Groundwater,
Surface
Hydrology
R:Hydro/veg E: hydro/veg R: Hydro/Veg E: Hydro/Veg R: Hydro/veg
Supporting Docs?
PCN
PCN
PCN/Prospectus
PCN/Prospectus
N/A
Floodplain develop
permit
N/A
Endangered Species Act Yes Yes
Historic Preservation Act No N/A
Water of the United States - Section 404 Yes Yes
Water of the United States - Section 401 Yes Yes
Essential Fisheries Habitat No N/A
Coastal Zone Management Act (CZMA or CAMA)No N/A
FEMA Floodplain Compliance Yes Yes
Preservation
Regulatory Considerations
Parameters Applicable? Resolved?
Soil Hydric Status Hydric
Non-Hydric, Non-
Hyrdic, Non-
Hydric, Hydric
Source of Hydrology Groundwater,
Surface Hydrology
Groundwater,
Surface
Hydrology
Restoration or enhancement method (hydrologic, vegetative etc.)Preservation
Mapped Soil Series Bb, Kn CrC2, NoC,
WaD, We
Drainage class poorly drained
moderatly well
drained, well
drained, well
drained, poorly
drained
Size of Wetland (acres)2.3 2.49
Wetland Type (non-riparian, riparian riverine or riparian non-riverine)RR RR
FEMA classification AE AE
Parameters W1 W2
Stream Classification (proposed)DA/E5 E5/C5
Evolutionary trend (Simon)IV/V IV/V
Wetland Summary Information
Perennial, Intermittent, Ephemeral Intermittent Perennial
NCDWR Water Quality Classification C, WS-IV C, WS-IV
Valley confinement (Confined, moderately confined, unconfined)unconfined unconfined
Drainage area (Acres and Square Miles)184 ac and 0.288
sq mi
260 ac and 0.406
sq mi
Parameters Reach UT1-R1 Reach UT1-R2
Length of reach (linear feet)2,131 2,007
Project Drainage Area (Acres and Square Miles)184 ac and 0.288 sq. mi (UT1-R1), 512 ac and 0.8 sq.
mi (UT2-R3)
Project Drainage Area Percentage of Impervious Area <1%
CGIA Land Use Classification 2.01.03, 2.01.01, 3.02 (46% pasture/hay, 24% row
crop, 16% mixed forest)
Stream Classification (existing)E5 (incised) E5 (incised)
Table 4. Project Background Information
Project Name Hollowell Mitigation Project
County Wayne
Project Area (acres) 72.049
River Basin Neuse
USGS Hydrologic Unit 14-digit 03020201170060
DWR Sub-basin 03-04-02
Project Coordinates (latitude and longitude)35.35814⁰, -78.11642⁰
Planted Acreage (Acres of Woody Stems Planted)57 in total and 17 for stream/wetland
Project Watershed Summary Information
Physiographic Province Inner Coastal Plain
Reach Summary Information

Appendix B:
Visual Assessment Data

Figure 1 a & 1b: Current Condition Plan View (CCPV)
Stream Station Photographs
Vegetation Plot Photographs
Additional Photographs

")
")
")
!.
!.
!.
!.
!.
!.
!.
!.
!.
!.
!.
!>
1
12
13
10
11
Access: 35.354770, -78.127019
UT1-R2
Culvert
W4
W4a
W3a
W3
UT1-R1
FG-1
CG-1
XS-1
XS-2
X S -3
XS-4 XS-5
XS-6
X
S
-7
Ditch
PS-1
PS-2
WG-5
WG-4
GG-1
WG-3
WG-2
3
7
9
6
5
4
2
8
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CN ES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community
FIGURE1aHollowell Mitigation ProjectWayne County, North Carolina NAD 1983 2011 State PlaneNorth Carolina FIPS 3200 FT US
0 250 500Feet
±
Conservation Easement
To p o f Bank
Str eam
En hancement II
Prese rva tio n
Resto ra tion (H W/PI)
Resto ra tion (PI)
Resto ra tion (PI/PII)
Wetland
Re-esta blish men t
En hancement
Prese rva tio n
Culvert
Cross Sections
")Ph oto Station
!.Rain Ga uge
!>Flow G auge
!.Crest Ga uge
")Be nth ic Sampling
!.Groun dwater G aug e
Wetland Gauge
!.Su cce ss Criteria Met
Vegetation Plots
Su cce ss Criteria Met
USACE Action ID Number: SAW-2017-00159November 2023MY4
USACECurrent Conditions Plan ViewMonitoring Year 4
")
")
")
!>
!.
!.
!.
!.
!.
")
!.
!.
!.Access: 35.354368, -78.114349
W2a
W2
UT2-R1 (Upper )
UT2A
UT2-R2 UT2B
Culvert
Culvert
FG-2
CG-2
X
S-8
XS-9
X
S
-
1
0XS-11
UT2-R1 (Low er)
UT2-R3
Ditch
W1PS-4
PS-3
14
PS-5
16
15
17 18
19
20
21
22
23
24
WG-6
WG-7
WG-8
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CN ES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community
FIGURE1bHollowell Mitigation ProjectWayne County, North Carolina NAD 1983 2011 State PlaneNorth Carolina FIPS 3200 FT US
0 250 500Feet
±
Con serva tion Ea seme nt
To p o f Bank
Stream
En hancement II
Prese rva tio n
Resto ra tion (H W/PI)
Resto ra tion (PI)
Resto ra tion (PI/PII)
We tland
Re-e stablish ment
Enha nce ment
Preser vatio n
Water Q uality Featu re
Culvert
Cross Se ction s
")Ph oto Station
!>Flow G au ge
!.Crest G aug e
!.Rain G aug e
")Be nth ic Sampling
We tland G auge
!.Succes s C riteria Met
!.Succes s C riteria No t Me t
Ve ge tation Plots
Succes s C riteria Met
USACECurrent Conditions Plan ViewMonitoring Year 4
USACE Action ID Number: SAW-2017-00159November 2023MY4
PS-1, Ford Crossing UT1-R1, Upstream (MY-01)PS-1, Ford Crossing UT1-R1, Upstream (MY-04)
PS-1, Ford Crossing UT1-R1, Downstream (MY-04)PS-1 Ford Crossing UT1-R1, Downstream (MY-01)
PS-2, Crossing UT1-R2, Downstream (MY-01)
PS-2, Crossing UT1-R2, Upstream (MY-01)PS-2, Crossing UT1-R2, Upstream (MY-04)
PS-2, Crossing UT1-R2, Downstream (MY-04)
PS-2, Crossing UT1-R2, Upstream-Left, November,21 2023 (MY-04)
PS-2, Crossing UT1-R2, Downstream-Left, November 11, 2023
(MY-04)
PS-3, Crossing UT2-R1, Upstream, May 1, 2020 (MY-01)PS-3, Crossing UT2-R1, Upstream (MY-04)
PS-3, Crossing UT2-R1, Downstream, May 1, 2020 (MY-01)PS-3, Crossing UT2-R1, Downstream (MY-04)
PS-3, Crossing UT2-R1, Upstream-Left, April 19, 2023 (MY-04)
PS-3, Crossing UT2-R1, Downstream-Left, April 19, 2023 (MY-04)
PS-4, Crossing @ Ditch, Upstream, May 1, 2020 (MY-01)PS-4, Crossing @ Ditch, Upstream (MY-04)
PS-4, Crossing @ Ditch, Downstream, May 1, 2020 (MY-01)PS-4, Crossing @ Ditch, Downstream (MY-04)
PS-4, Crossing @ Ditch, Upstream-Left, April 19, 2023 (MY-04)
PS-4, Crossing @ Ditch, Downstream-Left, April 19, 2023 (MY-04)
PS-5, UT2-R3, Upstream, August 4, 2020 (MY-01)PS-5, UT2-R3, Upstream (MY-04)
PS-5, UT2-R3, Downstream, August 4, 2020 (MY-01)PS-5, UT2-R3, Downstream (MY-04)
Veg Plot 1 (MY-04)
Veg Plot 2 (MY-04)
Veg Plot 1 (MY-00)
Veg Plot 2 (MY-00)
Veg Plot 3 (MY-04)
Veg Plot 4 (MY-04)
Veg Plot 3 (MY-00)
Veg Plot 4 (MY-00)
Veg Plot 5 (MY-04)
Veg Plot 6 (MY-04)
Veg Plot 5 (MY-00)
Veg Plot 6 (MY-00)
Veg Plot 7 (MY-04)Veg Plot 7 (MY-00)
Veg Plot 8 (MY-00)Veg Plot 8 (MY-04)
Veg Plot 9 (MY-00)Veg Plot 9 (MY-04)
Veg Plot 10 (MY-00)Veg Plot 10 (MY-04)
Veg Plot 11 (MY-00)Veg Plot 11 (MY-04)
Veg Plot 12 (MY-00)Veg Plot 12 (MY-04)
Veg Plot 13 (MY-00)Veg Plot 13 (MY-04)
Veg Plot 14 (MY-00)Veg Plot 14 (MY-04)
Veg Plot 15 (MY-00)Veg Plot 15 (MY-04)
Veg Plot 16 (MY-00)Veg Plot 16 (MY-04)
Veg Plot 17 (MY-00)Veg Plot 17 (MY-04)
Veg Plot 18 (MY-00)Veg Plot 18 (MY-04)
Veg Plot 19 (MY-00)Veg Plot 19 (MY-04)
Veg Plot 20 (MY-00)Veg Plot 20 (MY-04)
Veg Plot 21 (MY-00)Veg Plot 21 (MY-04)
Veg Plot 22 (MY-00)Veg Plot 22 (MY-04)
Veg Plot 23 (MY-00)Veg Plot 23 (MY-04)
Veg Plot 24 (MY-00)Veg Plot 24 (MY-04)
UT1-R1 (4/19/2023)
UT1 Middle (4/19/2023)UT1-R1 Headwater Channel (4/19/2023)
UT1-R1 (4/19/2023)
UT2-R1 & UT2A (4/19/2023)
UT1-R1 (4/19/2023) UT1-R2 (4/19/2023)
UT2A (4/19/2023)
UT2-R1 Lower (4/19/2023)
UT2A Upper (4/19/2023) UT2A (4/19/2023)
UT2-R1 Upper Headwater Channel (4/19/2023)
UT2-R2 Lower (4/19/2023) UT2-R2 (4/19/2023)
UT2A Flow UT2-R1 Flow
UT1-R1 Flow
Appendix C:
Vegetation Monitoring Plot
Data
Table 5a: Planted and Total Stem Counts
Table 5b: Vegetation Plot Mitigation Success Summary
Table 5c: Red-line Plant List
PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T
Aronia arbutifolia Red Chokeberry Shrub 1 1 1 111
Baccharis halimifolia eastern baccharis Shrub
Betula nigra river birch Tree 111111222 111111
Carpinus caroliniana American hornbeam Tree 1 1 1 111111
Cephalanthus occidentalis common buttonbush Shrub 111
Clethra alnifolia coastal sweetpepperbush Shrub 111
Cornus amomum silky dogwood Tree 1 1 1 111333
Cyrilla racemiflora swamp titi Shrub
Fraxinus pennsylvanica green ash Tree 222111 555
Ilex glabra inkberry Shrub 111
Itea virginica Virginia sweetspire Shrub
Lindera benzoin northern spicebush Shrub 1 1 1
Liquidambar styraciflua sweetgum Tree
Liriodendron tulipifera tuliptree Tree 111
Magnolia virginiana sweetbay Tree
Nyssa biflora swamp tupelo Tree
Persea borbonia redbay tree 222222
Pinus taeda loblolly pine Tree
Platanus occidentalis American sycamore Tree 2 2 2
Populus deltoides eastern cottonwood Tree
Quercus alba white oak Tree 1 1 1
Quercus bicolor swamp white oak Tree 2 2 2
Quercus michauxii swamp chestnut oak Tree 222111 111 111
Quercus nigra water oak Tree 1 1 1 2 2 2
Quercus pagoda cherrybark oak Tree 111
Quercus phellos willow oak Tree 2 2 2
Rhus copallinum flameleaf sumac shrub
Salix nigra black willow Tree 510
Taxodium distichum bald cypress Tree 111222222555333222
Ulmus americana American elm Tree 111
Viburnum nudum possumhaw Shrub 111
Stem count 8881616161111119914888141424
size (ares)111111
size (ACRES)0.02 0.02 0.02 0.02 0.02 0.02
Species count 666111111777556666778
Stems per ACRE 324 324 324 647 647 647 445 445 445 364 364 567 324 324 324 567 567 971
Color for Density
Exceeds requirements by 10%
Exceeds requirements, but by less than 10%
Fails to meet requirements, by less than 10%
Fails to meet requirements by more than 10%
Table 5a: Stem Counts and Densitites Hollowell Current Plot Data (MY4 2023)
004-01-0001 004-01-0002 004-01-0003 004-01-0004 004-01-0005 004-01-0006
Scientific Name Common Name Species Type
PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T
Aronia arbutifolia Red Chokeberry Shrub 1 1 1 222333
Baccharis halimifolia eastern baccharis Shrub
Betula nigra river birch Tree 2 2 2 113 54413
Carpinus caroliniana American hornbeam Tree
Cephalanthus occidentalis common buttonbush Shrub
Clethra alnifolia coastal sweetpepperbush Shrub 111
Cornus amomum silky dogwood Tree 111222111222111
Cyrilla racemiflora swamp titi Shrub
Fraxinus pennsylvanica green ash Tree 1 1 1 1 1 1
Ilex glabra inkberry Shrub
Itea virginica Virginia sweetspire Shrub 1 1 1
Lindera benzoin northern spicebush Shrub
Liquidambar styraciflua sweetgum Tree
Liriodendron tulipifera tuliptree Tree 111
Magnolia virginiana sweetbay Tree 111
Nyssa biflora swamp tupelo Tree 1 1 1
Persea borbonia redbay tree 1 1 1 2 2 2
Pinus taeda loblolly pine Tree
Platanus occidentalis American sycamore Tree 222111 1222
Populus deltoides eastern cottonwood Tree
Quercus alba white oak Tree
Quercus bicolor swamp white oak Tree 111 222
Quercus michauxii swamp chestnut oak Tree 2 2 2 111
Quercus nigra water oak Tree 111
Quercus pagoda cherrybark oak Tree 222 111
Quercus phellos willow oak Tree
Rhus copallinum flameleaf sumac shrub
Salix nigra black willow Tree 9 5
Taxodium distichum bald cypress Tree 1 1 1 222444333
Ulmus americana American elm Tree 111222111
Viburnum nudum possumhaw Shrub
Stem count 8881010198881212141212239918
size (ares)111111
size (ACRES)0.02 0.02 0.02 0.02 0.02 0.02
Species count 666778777888669333
Stems per ACRE 324 324 324 405 405 769 324 324 324 486 486 567 486 486 931 364 364 728
Color for Density
Exceeds requirements by 10%
Exceeds requirements, but by less than 10%
Fails to meet requirements, by less than 10%
Fails to meet requirements by more than 10%
Table 5a: Stem Counts and Densitites Hollowell
Scientific Name Common Name Species Type
004-01-0011 004-01-0012
Current Plot Data (MY4 2023)
004-01-0007 004-01-0008 004-01-0009 004-01-0010
004-01-0013 004-01-0014 004-01-0015
PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T
Aronia arbutifolia Red Chokeberry Shrub 333 111111
Baccharis halimifolia eastern baccharis Shrub
Betula nigra river birch Tree 223111111223333333
Carpinus caroliniana American hornbeam Tree 111
Cephalanthus occidentalis common buttonbush Shrub 222
Clethra alnifolia coastal sweetpepperbush Shrub 222111
Cornus amomum silky dogwood Tree 222
Cyrilla racemiflora swamp titi Shrub 2 2 2
Fraxinus pennsylvanica green ash Tree 222 222
Ilex glabra inkberry Shrub 111
Itea virginica Virginia sweetspire Shrub 111
Lindera benzoin northern spicebush Shrub
Liquidambar styraciflua sweetgum Tree
Liriodendron tulipifera tuliptree Tree 112 1111 3111
Magnolia virginiana sweetbay Tree 222 111
Nyssa biflora swamp tupelo Tree
Persea borbonia redbay tree 222111111
Pinus taeda loblolly pine Tree
Platanus occidentalis American sycamore Tree 2 2 5 111 3222
Populus deltoides eastern cottonwood Tree
Quercus alba white oak Tree 111
Quercus bicolor swamp white oak Tree 111 111
Quercus michauxii swamp chestnut oak Tree 111111
Quercus nigra water oak Tree 2 2 2 111
Quercus pagoda cherrybark oak Tree 1 1 1
Quercus phellos willow oak Tree 111 111
Rhus copallinum flameleaf sumac shrub
Salix nigra black willow Tree 7 8 2 2
Taxodium distichum bald cypress Tree 555222222 555111
Ulmus americana American elm Tree
Viburnum nudum possumhaw Shrub 1333
Stem count 12 12 23 8 8 18 16 16 19 9 9 10 15 15 23 17 17 17
size (ares)111111
size (ACRES)0.02 0.02 0.02 0.02 0.02 0.02
Species count 55655799117778811121212
Stems per ACRE 486 486 931 324 324 728 647 647 769 364 364 405 607 607 931 688 688 688
Color for Density
Exceeds requirements by 10%
Exceeds requirements, but by less than 10%
Fails to meet requirements, by less than 10%
Fails to meet requirements by more than 10%
Table 5a: Stem Counts and Densitites Hollowell
Scientific Name Common Name Species Type
004-01-0016 004-01-0017 004-01-0018
Current Plot Data (MY4 2023)
004-01-0019 004-01-0020 004-01-0021 004-01-0022 004-01-0023
PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T
Aronia arbutifolia Red Chokeberry Shrub 111222111111 111
Baccharis halimifolia eastern baccharis Shrub
Betula nigra river birch Tree 111111 555111
Carpinus caroliniana American hornbeam Tree
Cephalanthus occidentalis common buttonbush Shrub
Clethra alnifolia coastal sweetpepperbush Shrub 111
Cornus amomum silky dogwood Tree 111111111111 222
Cyrilla racemiflora swamp titi Shrub
Fraxinus pennsylvanica green ash Tree 1 1 1 111
Ilex glabra inkberry Shrub 111
Itea virginica Virginia sweetspire Shrub
Lindera benzoin northern spicebush Shrub
Liquidambar styraciflua sweetgum Tree
Liriodendron tulipifera tuliptree Tree 111111112
Magnolia virginiana sweetbay Tree 111
Nyssa biflora swamp tupelo Tree 111111
Persea borbonia redbay tree
Pinus taeda loblolly pine Tree
Platanus occidentalis American sycamore Tree 222222 111333
Populus deltoides eastern cottonwood Tree
Quercus alba white oak Tree 111111111
Quercus bicolor swamp white oak Tree 1 1 1 111111
Quercus michauxii swamp chestnut oak Tree 111555111
Quercus nigra water oak Tree 111
Quercus pagoda cherrybark oak Tree 111222 222
Quercus phellos willow oak Tree 111111 111
Rhus copallinum flameleaf sumac shrub
Salix nigra black willow Tree
Taxodium distichum bald cypress Tree 444333111333222
Ulmus americana American elm Tree 1 1 1 111
Viburnum nudum possumhaw Shrub
Stem count 9 9 9 14 14 14 13 13 13 20 20 20 9 9 10 10 10 10
size (ares)111111
size (ACRES)0.02 0.02 0.02 0.02 0.02 0.02
Species count 888999101010121212777555
Stems per ACRE 364 364 364 567 567 567 526 526 526 809 809 809 364 364 405 405 405 405
Color for Density
Exceeds requirements by 10%
Exceeds requirements, but by less than 10%
Fails to meet requirements, by less than 10%
Fails to meet requirements by more than 10%
Scientific Name Common Name Species Type
Table 5a: Stem Counts and Densitites Hollowell
004-01-0024
Current Plot Data (MY4 2023)
PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T
Aronia arbutifolia Red Chokeberry Shrub 191919222222222222232323242424
Baccharis halimifolia eastern baccharis Shrub 35
Betula nigra river birch Tree 333351262644262648343434313131
Carpinus caroliniana American hornbeam Tree 444555555777999
Cephalanthus occidentalis common buttonbush Shrub 333111111222333
Clethra alnifolia coastal sweetpepperbush Shrub 6 6 6 10 10 13 13 13 13 22 22 22 25 25 25
Cornus amomum silky dogwood Tree 20 20 20 23 23 23 26 26 26 37 37 37 34 34 34
Cyrilla racemiflora swamp titi Shrub 222222111111555
Fraxinus pennsylvanica green ash Tree 161616161616161616202020292929
Ilex glabra inkberry Shrub 333333444555111111
Itea virginica Virginia sweetspire Shrub 222222222222777
Lindera benzoin northern spicebush Shrub 111111
Liquidambar styraciflua sweetgum Tree 16 5
Liriodendron tulipifera tuliptree Tree 8 8 14 11 11 15 16 16 19 22 22 22 30 30 30
Magnolia virginiana sweetbay Tree 555555555666555
Nyssa biflora swamp tupelo Tree 333555444999242424
Persea borbonia redbay tree 111111131313151515121212151515
Pinus taeda loblolly pine Tree 1
Platanus occidentalis American sycamore Tree 20 20 27 20 20 24 21 21 21 19 19 19 14 14 14
Populus deltoides eastern cottonwood Tree 555888121212191919
Quercus alba white oak Tree 5 5 5 10 10 10 11 11 11 13 13 13 17 17 17
Quercus bicolor swamp white oak Tree 10 10 10
Quercus michauxii swamp chestnut oak Tree 171717161616151515121212
Quercus nigra water oak Tree 888888888151515161616
Quercus pagoda cherrybark oak Tree 101010111111101010131313444
Quercus phellos willow oak Tree 777777777999333
Rhus copallinum flameleaf sumac shrub 51
Salix nigra black willow Tree 48 28
Taxodium distichum bald cypress Tree 535353555555565656626262616161
Ulmus americana American elm Tree 777777888111111222222
Viburnum nudum possumhaw Shrub 445666777121212171717
Stem count 277 277 357 290 290 371 307 307 349 380 380 380 425 425 425
size (ares)24 24 24 24 24
size (ACRES)0.59 0.59 0.59 0.59 0.59
Species count 25 25 26 25 25 29 24 24 29 24 24 24 23 23 23
Stems per ACRE 469 469 605 489 489 626 518 518 588 641 641 641 717 717 717
Color for Density
Exceeds requirements by 10%
Exceeds requirements, but by less than 10%
Fails to meet requirements, by less than 10%
Fails to meet requirements by more than 10%
Scientific Name Common Name Species Type
Annual Means
MY4 (2023) MY3 (2022) MY2 (2021) MY1 (2020) MY0 (2020)
Table 5a: Stem Counts and Densitites Hollowell
Plot #Planted
Stems/Acre
Volunteers/
Acre
Total
Stems/Acre
Success
Criteria
Met
Average
Stem Height
(ft)
1 324 0 324 Yes 5.7
2 647 0 647 Yes 4.9
3 445 0 445 Yes 5.5
4 364 203 567 Yes 4.3
5 324 0 324 Yes 3.6
6 567 404 971 Yes 4.5
7 324 0 324 Yes 3.5
8 405 364 769 Yes 4.3
9 324 0 324 Yes 1.8
10 486 81 567 Yes 3.0
11 486 445 931 Yes 5.5
12 364 364 728 Yes 6.2
13 486 445 931 Yes 3.9
14 324 404 728 Yes 4.3
15 647 122 769 Yes 2.8
16 364 41 405 Yes 4.3
17 607 324 931 Yes 4.3
18 688 0 688 Yes 4.4
19 364 0 364 Yes 3.7
20 567 0 567 Yes 3.6
21 526 0 526 Yes 2.1
22 809 0 809 Yes 3.0
23 364 41 405 Yes 2.8
24 405 0 405 Yes 3.6
Project
Average 469 135 605 Yes 4.0
Table 5b: Vegetation Plot Mitigation Success Summary Table
Species Common Name Stems % Planted
Mitigation 
Plan Percent
Fraxinus pennsylvanica Green ash 2400 5.85% 7%
Betula nigra River birch 3400 8.29% 7%
Quercus nigra Water oak 2100 5.12% 5%
Nyssa biflora Swamp black gum 1050 2.56% 5%
Platanus occidentalis Sycamore 3400 8.29% 7%
Liriodendron tulipifera Tulip poplar 2800 6.83% 7%
Quercus phellos Willow oak 1600 3.90% 5%
Quercus alba White oak 1700 4.15% 5%
Quercus bicolor Swamp white oak 1700 4.15% 5%
Taxodium distichum Bald cypress 2900 7.07% 5%
Magnolia virginiana Sweetbay magnolia 2100 5.12% 6%
Carpinus caroliniana Ironwood 2900 7.07% 6%
Ulmus americana American elm 1175 2.87% 0%
Aronia arbutifolia Red chokecherry 1419 3.46% 0%
Ceplalanthus occ Buttonbush 400 0.98% 0%
Cyrilla racimiflora Titi 173 0.42% 6%
Itea virginica Sweetspire 1902 4.64% 6%
Viburnum nudum Possomhaw viburnum 2206 5.38% 0%
Clethra alnifolia Sweet pepperbush 1620 3.95% 6%
Cornus amomum Silky dogwood 1312 3.20% 0%
Persea borbonia Red bay 408 0.99% 0%
Ilex glabra Inkberry 841 2.05% 0%
Quercus pagoda Cherrybark oak 800 1.95% 0%
Quercus michauxii Swamp chestnut oak 700 1.71% 0%
Persea palustris Swamp bay 0 0.00%6%
Eubotrys recemosus Swamp doghobble 0 0.00%6%
Total 41,006 100%
* changes from mitigation plan in red
Table 5c: Hollowell Mitigation Project
Red‐line Planting List

Appendix D:
Stream Measurement and
Geomorphology Data
Table 6a: Baseline Stream Data Summary
Table 6b: Cross-section Morphology Data
Table 6c: Stream Reach Morphology Data
Table 6d: Evidence of Headwater Channel Formation

Parameter Parameter
Reach ID: UT1-R1 (Headwater) Reach ID: UT1-R2
Dimension (Riffle)Min Max Min Max Dimension (Riffle)Min Max Min Max
Bankfull Width (ft)- 4.6 4.5 6.6 Bankfull Width (ft)- 7.6 6.3 9.8
Floodprone Width (ft)20.0 40.0 32.3 63.2 Floodprone Width (ft)30.0 60.0 - 50.0
Bankfull Mean Depth (ft)- 0.3 0.3 0.5 Bankfull Mean Depth (ft)- 0.6 0.5 0.6
Bankfull Max Depth (ft)- 0.4 0.4 0.9 Bankfull Max Depth (ft)- 0.7 0.8 0.9
Bankfull Cross Sectional Area (ft2)- 1.2 1.2 3.5 Bankfull Cross Sectional Area (ft2)- 4.4 3.7 4.1
Width/Depth Ratio - 18.0 12.4 21.8 Width/Depth Ratio - 13.0 11.8 15.0
Entrenchment Ratio 4.3 8.6 7.1 9.6 Entrenchment Ratio 4.0 7.9 6.8 7.7
Bank Height Ratio - 1.0 1.0 1.0 Bank Height Ratio - 1.0 - 1.0
Profile Profile
Riffle Length (ft)30.0 70.0 27.0 71.7 Riffle Length (ft)22.0 43.0 23.3 40.4
Riffle Slope (ft/ft)0.003 0.004 0.001 0.004 Riffle Slope (ft/ft)0.003 0.004 0.002 0.005
Pool Length (ft)10.0 20.0 15.2 23.4 Pool Length (ft)25.0 40.0 20.2 37.0
Pool Max Depth (ft)0.4 0.8 0.7 1.0 Pool Max Depth (ft)1.2 1.4 1.2 1.5
Pool Spacing (ft)40.0 100.0 55.5 99.9 Pool Spacing (ft)27.0 53.0 42.9 79.0
Pattern Pattern
Channel Beltwidth (ft)--- -Channel Beltwidth (ft)30.0 55.0 44.0 52.8
Radius of Curvature (ft)--- -Radius of Curvature (ft)15.0 23.0 15.9 23.7
Rc:Bankfull Width (ft/ft)--- -Rc:Bankfull Width (ft/ft)2.0 3.0 2.4 2.5
Meander Wavelength (ft)--- -Meander Wavelength (ft)53.0 100.0 81.9 101.4
Meander Width Ratio --- -Meander Width Ratio 4.0 8.0 10.3 13.0
Transport Parameters Transport Parameters
Boundary Shear Stress (lb/ft2)Boundary Shear Stress (lb/ft2)
Max part size (mm) mobilized at bankfull Max part size (mm) mobilized at bankfull
Stream Power (W/m2)Stream Power (W/m2)
Additional Reach Parameters Additional Reach Parameters
Rosgen Classification Rosgen Classification
Bankfull Velocity (fps) Bankfull Velocity (fps)
Bankfull Discharge (cfs) Bankfull Discharge (cfs)
Sinuosity Sinuosity
Water Surface Slope (Channel) (ft/ft) Water Surface Slope (Channel) (ft/ft)
Bankfull Slope (ft/ft) Bankfull Slope (ft/ft)
Table 6a. Baseline Stream Data Summary
Hollowell Mitigation Project
Design Baseline Design Baseline
0.06 0.06 0.12 0.12
0.80 0.80 3.00 3.00
<2 <2<2 <2
DA/E5 DA/E5 E5/C5 E5/C5
2.5 2.5 4.3 4.3
1.0 1.02.1 2.1
0.004 0.004 0.004 0.003
1.18 1.191.03 1.04
0.004 0.0030.004 0.004
Parameter Parameter
Reach ID: UT2-R1 (Headwater) Reach ID: UT2-R2
Dimension (Riffle)Min Max Min Max Dimension (Riffle)Min Max Min Max
Bankfull Width (ft)- 4.5 - 16.0 Bankfull Width (ft)- 7.0 - 7.4
Floodprone Width (ft)20.0 40.0 - 33.7 Floodprone Width (ft)25.0 45.0 - 50.0
Bankfull Mean Depth (ft)- 0.3 - 0.2 Bankfull Mean Depth (ft)- 0.5 - 0.5
Bankfull Max Depth (ft)- 0.4 - 0.5 Bankfull Max Depth (ft)- 0.7 - 0.9
Bankfull Cross Sectional Area (ft2)- 1.1 - 3.5 Bankfull Cross Sectional Area (ft2)- 3.8 - 3.7
Width/Depth Ratio - 18.0 - 72.8 Width/Depth Ratio - 13.0 - 15.0
Entrenchment Ratio 4.3 8.6 - 2.1 Entrenchment Ratio 3.6 6.4 - 6.8
Bank Height Ratio - 1.0 - 1.0 Bank Height Ratio - 1.0 - 1.0
Profile Profile
Riffle Length (ft)30.0 70.0 55.6 71.4 Riffle Length (ft)22.0 43.0 30.8 46.5
Riffle Slope (ft/ft)0.004 0.005 0.003 0.006 Riffle Slope (ft/ft)0.005 0.008 0.003 0.007
Pool Length (ft)10.0 20.0 20.7 29.3 Pool Length (ft)23.0 42.0 16.0 37.2
Pool Max Depth (ft)0.4 0.8 0.6 1.4 Pool Max Depth (ft)1.2 1.4 0.9 1.6
Pool Spacing (ft)40.0 100.0 71.2 72.3 Pool Spacing (ft)27.0 50.0 35.6 74.0
Pattern Pattern
Channel Beltwidth (ft)----Channel Beltwidth (ft)27.0 55.0 34.2 51.0
Radius of Curvature (ft)----Radius of Curvature (ft)14.0 21.0 14.9 20.2
Rc:Bankfull Width (ft/ft)----Rc:Bankfull Width (ft/ft)2.0 3.0 2.0 2.7
Meander Wavelength (ft)----Meander Wavelength (ft)50.0 100.0 88.8 96.8
Meander Width Ratio ----Meander Width Ratio 3.8 7.8 12.0 13.1
Transport Parameters Transport Parameters
Boundary Shear Stress (lb/ft2)Boundary Shear Stress (lb/ft2)
Max part size (mm) mobilized at bankfull Max part size (mm) mobilized at bankfull
Stream Power (W/m2)Stream Power (W/m 2)
Additional Reach Parameters Additional Reach Parameters
Rosgen Classification Rosgen Classification
Bankfull Velocity (fps)Bankfull Velocity (fps)
Bankfull Discharge (cfs) Bankfull Discharge (cfs)
Sinuosity Sinuosity
Water Surface Slope (Channel) (ft/ft) Water Surface Slope (Channel) (ft/ft)
Bankfull Slope (ft/ft)Bankfull Slope (ft/ft)
Design Baseline Design Baseline
Table 6a. Baseline Stream Data Summary
Hollowell Mitigation Project
0.12 0.120.06 0.06
2.82 2.821.41 1.41
<2 <2<2 <2
E5/C5 E5/C5DA/E5 DA/E5
3.0 3.01.1 1.1
0.8 0.80.9 0.9
0.004 0.0060.005 0.005
1.16 1.171.07 1.07
0.004 0.0050.005 0.006
Parameter
Reach ID: UT2A (Headwater)
Dimension (Riffle)Min Max Min Max
Bankfull Width (ft)- 4.6 - 7.0
Floodprone Width (ft)20.0 50.0 - 67.1
Bankfull Mean Depth (ft)- 0.3 - 0.3
Bankfull Max Depth (ft)- 0.6 - 0.6
Bankfull Cross Sectional Area (ft2)- 1.2 - 2.0
Width/Depth Ratio - 18.0 - 24.8
Entrenchment Ratio 4.3 10.8 - 9.6
Bank Height Ratio - 1.0 - 1.0
Profile
Riffle Length (ft)30.0 70.0 31.8 58.6
Riffle Slope (ft/ft)0.002 0.002 0.002 0.002
Pool Length (ft)10.0 20.0 20.2 31.8
Pool Max Depth (ft)0.7 1.1 0.9 1.3
Pool Spacing (ft)30.0 60.0 40.9 50.0
Pattern
Channel Beltwidth (ft)----
Radius of Curvature (ft)----
Rc:Bankfull Width (ft/ft)----
Meander Wavelength (ft)----
Meander Width Ratio ----
Transport Parameters
Boundary Shear Stress (lb/ft2)
Max part size (mm) mobilized at bankfull
Stream Power (W/m2)
Additional Reach Parameters
Rosgen Classification
Bankfull Velocity (fps)
Bankfull Discharge (cfs)
Sinuosity
Water Surface Slope (Channel) (ft/ft)
Bankfull Slope (ft/ft)
Design Baseline
Table 6a. Baseline Stream Data Summary
Hollowell Mitigation Project
0.04 0.04
0.53 0.53
<2 <2
DA DA
1.6 1.6
1.4 1.4
0.002 0.002
1.01 1.02
0.002 0.002
Parameters Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7
Bankfull Width (ft) 4.5 4.4 4.7 4.7 N/A 6.6 15.0 13.7 13.2 N/A 6.2 6.3 5.7 5.7 N/A
Floodprone Width (ft) 32.3 32.5 33.5 33.6 N/A 63.2 58.9 57.9 57.1 N/A 44.8 44.8 43.3 43.3 N/A
Bankfull Mean Depth (ft) 0.3 0.3 0.3 0.3 N/A 0.5 0.2 0.3 0.3 N/A 0.3 0.3 0.3 0.3 N/A
Bankfull Max Depth (ft) 0.4 0.5 0.4 0.4 N/A 0.9 0.6 0.6 0.6 N/A 0.6 0.5 0.5 0.5 N/A
Bankfull Cross Sectional Area (ft2)1.2 1.2 1.2 1.2 N/A 3.5 3.5 3.5 3.5 N/A 1.7 1.7 1.7 1.7 N/A
Bankfull Width/Depth Ratio 16.7 15.6 17.5 17.9 N/A 12.4 63.8 54.2 49.4 N/A 21.8 22.9 16.8 18.8 N/A
Bankfull Entrenchment Ratio 7.1 7.4 7.2 7.1 N/A 9.6 3.9 4.2 4.3 N/A 7.3 7.1 7.6 7.6 N/A
Bankfull Bank Height Ratio 1.00 1.20 1.10 1.17 N/A 1.00 0.90 0.90 0.91 N/A 1.00 1.00 1.10 1.08 N/A
d50 (mm) <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A
Parameters Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7
Bankfull Width (ft) 8.2 7.2 7.4 7.7 N/A 9.8 15.7 15.6 16.0 N/A 8.6 11.2 10.9 13.2 N/A
Floodprone Width (ft) 50.0 50.0 50.0 50.0 N/A 48.1 48.1 47.6 45.2 N/A 39.1 39.4 39.2 39.0 N/A
Bankfull Mean Depth (ft) 0.5 0.5 0.6 0.6 N/A 0.7 0.4 0.4 0.4 N/A 0.8 0.6 0.7 0.5 N/A
Bankfull Max Depth (ft) 0.8 1.0 0.9 0.9 N/A 1.3 1.2 1.3 1.2 N/A 1.4 1.3 1.2 1.2 N/A
Bankfull Cross Sectional Area (ft2)4.3 4.3 4.3 4.3 N/A 6.8 6.8 6.8 6.8 N/A 7.1 7.1 7.1 7.1 N/A
Bankfull Width/Depth Ratio 15.4 12.1 12.9 13.8 N/A 14.1 36.5 35.7 37.5 N/A 10.4 17.7 16.7 24.5 N/A
Bankfull Entrenchment Ratio 6.1 6.9 6.7 6.5 N/A 4.9 3.1 3.1 2.8 N/A 4.6 3.5 3.6 3.0 N/A
Bankfull Bank Height Ratio 1.00 1.10 1.10 1.07 N/A 1.00 0.90 0.90 0.92 N/A 1.00 1.00 1.10 0.88 N/A
d50 (mm) <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A
Parameters Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7
Bankfull Width (ft) 6.3 6.8 9.7 7.9 N/A 16.0 19.1 20.9 21.6 N/A 7.0 11.0 11.7 12.8 N/A
Floodprone Width (ft) 41.4 41.0 41.3 41.3 N/A 34.4 43.8 40.8 40.8 N/A 67.1 61.4 64.4 28.3 N/A
Bankfull Mean Depth (ft) 0.5 0.4 0.3 0.4 N/A 0.2 0.2 0.2 0.2 N/A 0.3 0.2 0.2 0.2 N/A
Bankfull Max Depth (ft) 0.8 0.7 0.6 0.7 N/A 0.5 0.4 0.4 0.5 N/A 0.6 0.7 0.5 0.4 N/A
Bankfull Cross Sectional Area (ft2)3.0 3.0 3.0 3.0 N/A 3.5 3.5 3.5 3.5 N/A 2.0 2.0 2.0 2.0 N/A
Bankfull Width/Depth Ratio 13.1 15.4 31.6 21.0 N/A 72.8 104.8 123.8 133.4 N/A 24.8 60.4 68.4 79.9 N/A
Bankfull Entrenchment Ratio 6.6 6.0 4.3 5.2 N/A 2.1 2.3 1.9 1.9 N/A 9.6 5.6 5.5 2.2 N/A
Bankfull Bank Height Ratio 1.00 1.00 0.90 1.12 N/A 1.00 1.00 1.00 1.00 N/A 1.00 0.90 1.10 0.79 N/A
d50 (mm) <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A
Parameters Base MY1 MY2 MY3 MY4 MY5 MY6 MY7 Base MY1 MY2 MY3 MY4 MY5 MY6 MY7
Bankfull Width (ft) 7.9 10.0 10.4 13.9 N/A 7.4 11.5 15.5 15.5 N/A
Floodprone Width (ft) 36.2 35.5 36.6 36.5 N/A 50.0 50.0 50.0 50.0 N/A
Bankfull Mean Depth (ft) 0.5 0.4 0.4 0.3 N/A 0.5 0.3 0.2 0.2 N/A
Bankfull Max Depth (ft) 0.9 1.1 1.1 0.9 N/A 0.9 0.8 0.7 0.8 N/A
Bankfull Cross Sectional Area (ft2)3.8 3.8 3.8 3.8 N/A 3.7 3.7 3.7 3.7 N/A
Bankfull Width/Depth Ratio 16.6 26.3 27.9 51.5 N/A 15.0 35.2 64.8 65.1 N/A
Bankfull Entrenchment Ratio 4.6 3.6 3.5 2.6 N/A 6.8 4.4 3.2 3.2 N/A
Bankfull Bank Height Ratio 1.00 0.90 0.90 0.80 N/A 1.00 0.90 0.90 0.87 N/A
d50 (mm) <2 <2 <2 <2 N/A <2 <2 <2 <2 N/A
Table 6b. Monitoring Data - Dimensional Morphology Summary (Dimensional Parameters – Cross Sections)
Hollowell Mitigation Project
Cross Section 9 (Headwater)
Cross Section 10 (Pool) Cross Section 11 (Riffle)
Cross Section 1 (Headwater) Cross Section 2 (Headwater) Cross Section 3 (Headwater)
Cross Section 6 (Pool)Cross Section 4 (Riffle) Cross Section 5 (Pool)
Cross Section 8 (Headwater)Cross Section 7 (Riffle)
Parameter Parameter
Reach ID: UT1-R1 (Headwater)Reach ID: UT1-R2
Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max
Profile Profile
Riffle Length (ft) 27.0 71.7 Riffle Length (ft) 23.3 40.4
Riffle Slope (ft/ft) 0.00144 0.0041 Riffle Slope (ft/ft) 0.00197 0.00518
Pool Length (ft) 15.2 23.4 Pool Length (ft) 20.2 37.0
Pool Max depth (ft) 0.7 1.0 Pool Max depth (ft) 1.2 1.5
Pool Spacing (ft) 55.5 99.9 Pool Spacing (ft) 42.9 79.0
Pattern Pattern
Channel Beltwidth (ft) - -Channel Beltwidth (ft) 44 52.8
Radius of Curvature (ft) - -Radius of Curvature (ft) 15.85 23.7
Rc:Bankfull width (ft/ft) - -Rc:Bankfull width (ft/ft) 2.4 2.5
Meander Wavelength (ft) - -Meander Wavelength (ft) 81.9 101.4
Meander Width Ratio - -Meander Width Ratio 10.3 13
Additional Reach Parameters Additional Reach Parameters
Rosgen Classification Rosgen Classification
Sinuosity (ft)Sinuosity (ft)
Water Surface Slope (Channel) (ft/ft)Water Surface Slope (Channel) (ft/ft)
BF slope (ft/ft)BF slope (ft/ft)
3Ri% / Ru% / P% / G% / S%3Ri% / Ru% / P% / G% / S%
3SC% / Sa% / G% / C% / B% / Be%3SC% / Sa% / G% / C% / B% / Be%
3d16 / d35 / d50 / d84 / d95 /3d16 / d35 / d50 / d84 / d95 /
2% of Reach with Eroding Banks 2% of Reach with Eroding Banks
Channel Stability or Habitat Metric Channel Stability or Habitat Metric
Biological or Other Biological or Other
Parameter
Reach ID: UT2A
Min Max Min Max Min Max Min Max Min Max Min Max
Profile
Riffle Length (ft) 31.8 58.6
Riffle Slope (ft/ft) 0.00167 0.0024
Pool Length (ft) 20.2 31.8
Pool Max depth (ft) 0.9 1.3
Pool Spacing (ft) 40.9 50.0
Pattern
Channel Beltwidth (ft) - -
Radius of Curvature (ft) - -
Rc:Bankfull width (ft/ft) - -
Meander Wavelength (ft) - -
Meander Width Ratio - -
Additional Reach Parameters
Rosgen Classification
Sinuosity (ft)
Water Surface Slope (Channel) (ft/ft)
BF slope (ft/ft)
3Ri% / Ru% / P% / G% / S%
3SC% / Sa% / G% / C% / B% / Be%
3d16 / d35 / d50 / d84 / d95 /
2% of Reach with Eroding Banks
Channel Stability or Habitat Metric
Biological or Other
Baseline MY1 MY2 MY3 MY4 MY5
Table 6c. Monitoring Data - Stream Reach Summary
Hollowell Mitigation Project
Baseline MY1 MY2 MY3 MY4 MY5
Table 6c. Monitoring Data - Stream Reach Summary
Hollowell Mitigation Project
DA/E5 E5/C5
0.0035 0.003
1.04 1.19
0.0035 0.00308
MY2 MY3 MY4 MY5
Table 6c. Monitoring Data - Stream Reach Summary
Hollowell Mitigation Project
0.0019
DA
1.02
0.00196
Baseline MY1
Pattern and Profile data will not
typically be collected unless visual
data, dimensional data or profile
data indicate significant deviations
from baseline conditions
Pattern and Profile data will not
typically be collected unless visual
data, dimensional data or profile
data indicate significant deviations
from baseline conditions
Pattern and Profile data will not typically
be collected unless visual data,
dimensional data or profile data indicate
significant deviations from baseline
conditions
Parameter Parameter
Reach ID: UT2-R1 (Headwater)Reach ID: UT2-R2
Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max
Profile Profile
Riffle Length (ft) 55.6 71.4 Riffle Length (ft) 30.8 46.5
Riffle Slope (ft/ft) 0.00296 0.00594 Riffle Slope (ft/ft) 0.00312 0.00721
Pool Length (ft) 20.7 29.3 Pool Length (ft) 16.0 37.2
Pool Max depth (ft) 0.6 1.4 Pool Max depth (ft) 0.9 1.6
Pool Spacing (ft) 71.2 72.3 Pool Spacing (ft) 35.6 74.0
Pattern Pattern
Channel Beltwidth (ft) - -Channel Beltwidth (ft) 34.2 51
Radius of Curvature (ft) - -Radius of Curvature (ft) 14.9 20.2
Rc:Bankfull width (ft/ft) - -Rc:Bankfull width (ft/ft) 2.01351 2.72973
Meander Wavelength (ft) - -Meander Wavelength (ft) 88.8 96.8
Meander Width Ratio - -Meander Width Ratio 12 13.0811
Additional Reach Parameters Additional Reach Parameters
Rosgen Classification Rosgen Classification
Sinuosity (ft)Sinuosity (ft)
Water Surface Slope (Channel) (ft/ft)Water Surface Slope (Channel) (ft/ft)
BF slope (ft/ft)BF slope (ft/ft)
3Ri% / Ru% / P% / G% / S%3Ri% / Ru% / P% / G% / S%
3SC% / Sa% / G% / C% / B% / Be%3SC% / Sa% / G% / C% / B% / Be%
3d16 / d35 / d50 / d84 / d95 /3d16 / d35 / d50 / d84 / d95 /
2% of Reach with Eroding Banks 2% of Reach with Eroding Banks
Channel Stability or Habitat Metric Channel Stability or Habitat Metric
Biological or Other Biological or Other
Table 6c. Monitoring Data - Stream Reach Summary
Hollowell Mitigation Project
Table 6c. Monitoring Data - Stream Reach Summary
Hollowell Mitigation Project
Baseline MY1 MY2 MY3 MY4 MY5Baseline MY1 MY2 MY3 MY4 MY5
DA/E5 E5/C5
1.17
0.0046 0.0055
1.07
0.005350.00565
Pattern and Profile data will not
typically be collected unless visual
data, dimensional data or profile
data indicate significant deviations
from baseline conditions
Pattern and Profile data will not
typically be collected unless visual
data, dimensional data or profile
data indicate significant deviations
from baseline conditions
Channel Forming Indicators - UT1-R1 MY1 MY2 MY3 MY4
Scour (indicating sediment transport by flowing water) Yes Yes Yes Yes
Sediment deposition (accumulations of sediment and/or
formation of ripples)Yes Yes Yes Yes
Sediment sorting (sediment sorting indicated by grain-size
distribution within primary flow path)Yes Yes Yes Yes
Multiple observed flow events (must be documented by
gauge data and/or photographs)Yes Yes Yes Yes
Destruction of terrestrial vegetation No Yes No Yes
Presence of litter and debris Yes No No Yes
Wracking (deposits of drift material indicating surface water
flow)Yes No No Yes
Vegetation matted down, bent, or absent (herbaceous or
otherwise)No Yes No Yes
Leaf litter disturbed or washed away No No No Yes
Channel Forming Indicators - UT2-R1 MY1 MY2 MY3 MY4
Scour (indicating sediment transport by flowing water) Yes Yes Yes Yes
Sediment deposition (accumulations of sediment and/or
formation of ripples)Yes No No Yes
Sediment sorting (sediment sorting indicated by grain-size
distribution within primary flow path)Yes Yes Yes Yes
Multiple observed flow events (must be documented by
gauge data and/or photographs)Yes Yes Yes Yes
Destruction of terrestrial vegetation No No No Yes
Presence of litter and debris Yes No No Yes
Wracking (deposits of drift material indicating surface water
flow)Yes No No Yes
Vegetation matted down, bent, or absent (herbaceous or
otherwise)No Yes Yes Yes
Leaf litter disturbed or washed away No No No Yes
Channel Forming Indicators - UT2A MY1 MY2 MY3 MY4
Scour (indicating sediment transport by flowing water) Yes Yes Yes Yes
Sediment deposition (accumulations of sediment and/or
formation of ripples)No No No Yes
Sediment sorting (sediment sorting indicated by grain-size
distribution within primary flow path)No No No No
Multiple observed flow events (must be documented by
gauge data and/or photographs)Yes Yes Yes Yes
Destruction of terrestrial vegetation Yes No No Yes
Presence of litter and debris No No No Yes
Wracking (deposits of drift material indicating surface water
flow)No Yes No Yes
Vegetation matted down, bent, or absent (herbaceous or
otherwise)No Yes Yes Yes
Leaf litter disturbed or washed away No No No Yes
Table 6d. Evidence of Headwater Channel Formation
Hollowell Mitigation Project

Appendix E:
Hydrologic Data

Table 7: Verification of Bankfull Events
Figure 2: Surface Flow Data
Figure 3: Flow Gauge and Crest Gauge Installation Diagram
Figure 4: Rainfall Data
Figure 5: Wetland Gauge Data

Monitoring
Year Date of Collection
Date of
Occurrence Method Photos/Notes
Measurement
above bankfull
(feet)
7/7/2020 4/30/2020 Pressure Transducer Bankfull from rain event 0.495
7/7/2020 5/20/2020 Pressure Transducer Bankfull from rain event 0.142
7/7/2020 6/17/2020 Pressure Transducer Bankfull from rain event 0.38
10/26/2020 8/4/2020 Pressure Transducer Bankfull from rain event 0.665
10/26/2020 8/9/2020 Pressure Transducer Bankfull from rain event 0.272
10/26/2020 8/20/2020 Pressure Transducer Bankfull from rain event 0.327
10/26/2020 9/5/2020 Pressure Transducer Bankfull from rain event 1.701
10/26/2020 9/11/2020 Pressure Transducer Bankfull from rain event 0.778
10/26/2020 9/17/2020 Pressure Transducer Bankfull from rain event 0.526
10/26/2020 9/25/2020 Pressure Transducer Bankfull from rain event 0.429
10/26/2020 9/29/2020 Pressure Transducer Bankfull from rain event 0.702
10/26/2020 10/11/2020 Pressure Transducer Bankfull from rain event 0.194
10/26/2020 10/25/2020 Pressure Transducer Bankfull from rain event 0.273
10/26/2020 Unknown Cork Gauge Yes 1.4
3/29/2021 1/2/2021 -
1/10/2021 Pressure Transducer Bankfull as a result of backwater
from the Neuse River 3.921
3/29/2021 1/26/2021 Pressure Transducer Bankfull from rain event 0.221
3/29/2021 1/31/2021 Pressure Transducer Bankfull from rain event 0.169
3/29/2021 2/11/2021 -
2/25/2021 Pressure Transducer Bankfull as a result of backwater
from the Neuse River 3.993
3/29/2021 3/16/2021 Pressure Transducer Bankfull from rain event 0.578
3/29/2021 Unknown Cork Gauge Yes 3.5
8/5/2021 6/3/2021 Pressure Transducer Bankfull from rain event 0.885
8/5/2021 6/10/2021 Pressure Transducer Bankfull from rain event 0.163
8/5/2021 7/8/2021 Pressure Transducer Bankfull from rain event 0.285
8/5/2021 7/27/2021 Pressure Transducer Bankfull from rain event 0.321
8/5/2021 8/1/2021 Pressure Transducer Bankfull from rain event 0.29
8/5/2021 8/4/2021 Pressure Transducer Bankfull from rain event 0.25
8/5/2021 Unknown Cork Gauge Yes 1.2
10/1/2021 8/7/2021 Pressure Transducer Bankfull from rain event 1.289
1/14/2022 1/1/2022 Pressure Transducer Bankfull from rain event 0.217
1/14/2022 1/3/2022 Pressure Transducer Bankfull from rain event 0.26
4/14/2022 1/16/2022 Pressure Transducer Bankfull from rain event 0.15
4/14/2022 1/17/2022 Pressure Transducer Bankfull from rain event 0.099
4/14/2022 2/7/2022 Pressure Transducer Bankfull from rain event 0.147
4/14/2022 3/12/2022 Pressure Transducer Bankfull from rain event 0.17
10/10/2022 7/8/2022 Pressure Transducer Bankfull from rain event 0.1
10/10/2022 7/9/2022 Pressure Transducer Bankfull from rain event 0.23
10/10/2022 7/10/2022 Pressure Transducer Bankfull from rain event 0.159
10/10/2022 9/30/2022
Pressure Transducer Bankfull from rain event 0.125
4/19/2023 1/25/2023 Pressure Transducer Bankfull from rain event 0.51
4/19/2023 2/12/2023 Pressure Transducer Bankfull from rain event 0.054
4/19/2023 3/27/2023 Pressure Transducer Bankfull from rain event 0.04
4/19/2023 4/8/2023 Pressure Transducer Bankfull from rain event 0.349
9/28/2023 8/31/2023 Pressure Transducer Bankfull from rain event 0.326
9/28/2023 9/23/2023
Pressure Transducer Bankfull from rain event 0.527
Table 7A: Verification of Bankfull Events - UT1-R2
Hollowell Mitigation Site - WLS Neuse 01 Bank
MY1
MY2
MY3
MY4
Monitoring
Year Date of Collection
Date of
Occurrence Method Photos/Notes
Measurement
above bankfull
(feet)
7/7/2020 Unknown Cork Gauge Yes 0.72
7/7/2020 4/30/2020 Pressure Transducer Bankfull from rain event 1.498
7/7/2020 5/20/2020 Pressure Transducer Bankfull from rain event 0.658
7/7/2020 5/28/2020 Pressure Transducer Bankfull from rain event 0.206
7/7/2020 6/17/2020 Pressure Transducer Bankfull from rain event 0.834
10/26/2020 8/4/2020 Pressure Transducer Bankfull from rain event 1.353
10/26/2020 8/9/2020 Pressure Transducer Bankfull from rain event 0.284
10/26/2020 Unknown Cork Gauge Yes 0.55
3/21/2021
1/1/2021 -
1/3/2021 Pressure Transducer Bankfull from rain event 1.56
3/21/2021 2/1/2021 Pressure Transducer Bankfull from rain event 0.228
3/21/2021
2/11/2021 -
2/16/2021 Pressure Transducer Bankfull from rain event 1.142
3/21/2021
2/18/2021 -
2/20/2021 Pressure Transducer Bankfull from rain event 1.263
3/21/2021 Unknown Cork Gauge Yes 1.2
8/5/2021 3/16/2021 Pressure Transducer Bankfull from rain event 1.469
8/5/2021 3/31/2021 Pressure Transducer Bankfull from rain event 0.222
8/5/2021 6/2/2021 -
6/5/2021 Pressure Transducer Bankfull from rain event 1.453
8/5/2021 6/9/2021 -
6/13/2021 Pressure Transducer Bankfull from rain event 0.442
8/5/2021 6/26/2021 Pressure Transducer Bankfull from rain event 0.49
8/5/2021 6/29/2021 -
7/2/2021 Pressure Transducer Bankfull from rain event 0.321
8/5/2021 7/8/2021 -
7/15/2021 Pressure Transducer Bankfull from rain event 0.622
8/5/2021 Unknown Cork Gauge Yes 0.8
8/5/2021 7/18/2021 -
8/5/2021 Pressure Transducer Bankfull from rain event 0.57
1/14/2022 1/1/2022 Pressure Transducer Bankfull from rain event 0.09
1/14/2022 1/3/2022 Pressure Transducer Bankfull from rain event 0.16
4/14/2022 1/16/2022 Pressure Transducer Bankfull from rain event 0.7
4/14/2022 1/17/2022 Pressure Transducer Bankfull from rain event 0.1
4/14/2022 3/12/2022 Pressure Transducer Bankfull from rain event 0.04
10/10/2022 7/7/2022 Pressure Transducer Bankfull from rain event 0.01
10/10/2022 7/8/2022 Pressure Transducer Bankfull from rain event 0.46
10/10/2022 7/9/2022 Pressure Transducer Bankfull from rain event 0.36
10/10/2022 7/10/2022 Pressure Transducer Bankfull from rain event 0.28
10/10/2022 7/15/2022 Pressure Transducer Bankfull from rain event 0.02
10/10/2022 8/12/2022 Pressure Transducer Bankfull from rain event 0.002
10/10/2022 9/10/2022 Pressure Transducer Bankfull from rain event 0.04
10/10/2022 9/11/2022 Pressure Transducer Bankfull from rain event 0.005
10/10/2022 9/30/2022 Pressure Transducer Bankfull from rain event 0.2
10/10/2022 10/1/2022 Pressure Transducer Bankfull from rain event 0.04
4/19/2023 1/25/2023 Pressure Transducer Bankfull from rain event 0.44
4/19/2023 2/3/2023 Pressure Transducer Bankfull from rain event 0.02
4/19/2023 2/12/2023 Pressure Transducer Bankfull from rain event 0.08
4/19/2023 3/27/2023 Pressure Transducer Bankfull from rain event 0.07
4/19/2023 4/8/2023 Pressure Transducer Bankfull from rain event 0.42
5/25/2023 4/22/2023 Pressure Transducer Bankfull from rain event 0.06
5/25/2023 4/28/2023 Pressure Transducer Bankfull from rain event 0.17
8/2/2023 5/28/2023 Pressure Transducer Bankfull from rain event 0.004
8/2/2023 7/8/2023 Pressure Transducer Bankfull from rain event 0.07
8/2/2023 7/14/2023 Pressure Transducer Bankfull from rain event 0.65
8/2/2023 7/31/2023 Pressure Transducer Bankfull from rain event 0.01
9/28/2023 8/31/2023 Pressure Transducer Bankfull from rain event 0.06
9/28/2023 9/24/2023 Pressure Transducer Bankfull from rain event 0.24
MY4
MY1
Table 7B: Verification of Bankfull Events - UT2-R2
Hollowell Mitigation Site - WLS Neuse 01 Bank
MY2
MY3
Figure 2: Surface Flow Data

0
0.5
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Hollowell Flow Gauge FG-1 (UT1-R1)
Rainfall Sensor Depth Downstream Riffle
Maximum Days of Consecutive Flow
69 days (2/11/2023 - 4/20/2023)End of MY4 Data
10/2/2023
129 Days of Cumulative Flow 146 Days of No Flow
0
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Hollowell Flow Gauge FG-2 (UT2-R1)
Rainfall Sensor Depth Downstream Riffle
Maximum Days of Consecutive Flow
271 days (1/1/2023 - 9/28/2023)
End of MY4 Data
9/28/2023
271 Days of Cumulative Flow 0 Days of No Flow

0
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Hollowell Crest Gauge CG-1 (UT1-R2)
Daily Rainfall Stream Max Depth Bankfull Depth
End of MY4 Data
9/28/2023
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Hollowell Crest Gauge CG-2 (UT2-R2)
Daily Rainfall Stream Max Depth Bankfull Depth
End of MY4 Data
9/28/2023
FLOW GAUGE #1 - UT1-R1
Flow Depth = (Sensor Depth + Top) - Elevation of
Riffle Flow Depth = (4.88 + 4.15) - 8.30
Flow Depth = 0.73 feet
FLOW
RIFFLE
POOL
RIFFLE
TOP OF FLOW GAUGE
ELEV. = 4.15
BASEFLOW SE
N
S
O
R

D
E
P
T
H

=
4.
8
8
ELEVATION OF DOWN
STREAM RIFFLE = 8.30
Figure 3: Flow Gauge and Crest Gauge Diagrams
FLOW GAUGE #2 - UT2-R1
Flow Depth = (Sensor Depth + Top) - Elevation of Riffle
Flow Depth = (4.80 + 4.56) - 8.79
Flow Depth = 0.57 feet
FLOW
RIFFLE
POOL
RIFFLE
TOP OF FLOW GAUGE
ELEV. = 4.56
BASEFLOW SE
N
S
O
R

D
E
P
T
H

=
4.
8
0
ELEVATION OF DOWN
STREAM RIFFLE = 8.79
CROSS SECTIONAL VIEW OF STREAM
TOP OF CREST GAUGE
+(,*+7 = 4.75
PRESSURE
TRANSDUCER
SE
N
S
O
R

D
E
P
T
H

=
4.
8
5
CORK GAUGE
8.65
BANKFULL
DEPTH
&UHVW*DXJH&*875
%DQNIXOO(YHQW'HSWKIRUWUDQVGXFHU 7RSRI*DXJH6HQVRU'HSWK%DQNIXOO'HSWK
%DQNIXOO(YHQW'HSWK 0.95
CROSS SECTIONAL VIEW OF STREAM
TOP OF CREST GAUGE
+(,*+7 = 25
PRESSURE
TRANSDUCER
SE
N
S
O
R

D
E
P
T
H

=
4.
9
8
CORK GAUGE
9.13=
BANKFULL
DEPTH
&UHVW*DXJH&*872-52
%DQNIXOO(YHQW'HSWKIRUWUDQVGXFHU 7RSRI*DXJH6HQVRU'HSWK%DQNIXOO'HSWK
%DQNIXOO(YHQW'HSWK 1.30
Month 30th Percentile 70th Percentile Observed Monthly Rainfall
Nov-22 1.70 4.18 2.89
Dec-22 2.48 4.42 2.40
Jan-23 2.22 3.84 3.61
Feb-23 2.16 4.02 3.39
Mar-23 2.25 3.95 2.70
Apr-23 2.67 4.41 6.41
May-23 2.60 4.73 3.36
Jun-23 2.70 5.32 3.78
Jul-23 4.43 6.57 6.47
Aug-23 4.66 6.39 8.28
Sep-23 3.97 8.03 4.41
Oct-23 1.39 3.88 1.03
Nov-23 1.70 4.18 **
Dec-23 2.48 4.42 **
**Incomplete Month
*30th and 70th percentile data collected from weather station GOLD - Cherry Research Station in Goldsboro, NC.
Figure 4: Monthly Rainfall Data
Hollowell Mitigation Site
MY4 2023
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
Nov-22 Dec-22 Jan-23 Feb-23 Mar-23 Apr-23 May-23 Jun-23 Jul-23 Aug-23 Sep-23 Oct-23
Ra
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Monthly Rainfall
Observed Monthly Rainfall 30th Percentile 70th Percentile
Figure 5
Monitoring Gauge Name MY1
2020
MY2
2021
MY3
2022
MY4
2023
MY5
2024
MY6
2025
MY7
2026 Mean
Groundwater Gauge 1 3.90% 2.16% 0.00%2.60%2.17%
Wetland Gauge 2 34.20% 31.17% 17.32%22.51%26.30%
Wetland Gauge 3 79.22% 26.84% 31.17%39.39%44.16%
Wetland Gauge 4 30.74% 17.32% 10.39%12.99%17.86%
Wetland Gauge 5 33.77% 23.38% 15.58%24.24%24.24%
Wetland Gauge 6 79.22% 86.15% 88.31%83.12%84.20%
Wetland Gauge 7 79.22% 86.15% 18.18%57.58%60.28%
Wetland Gauge 8 12.55% 12.12% 25.11%3.03%13.20%
Meets 12% hydroperiod
Fails to meet 12% hydroperiod
Max Consecutive Hydroperiod
Saturation within 12 Inches of Soil Surface (Percent of Growing Season 3/21-11/6)
CRONOS Station: GOLD - Cherry Research Station
Figure 5

0
0.5
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Hollowell Groundwater Gauge GW -1
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
10/2/2023
Hydrologic Criteria Not Met
6 days: 2.60% of Growing Season
0
0.5
1
1.5
2
2.5
3
-30
-25
-20
-15
-10
-5
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10
1/
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3/
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3
3/
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3
4/
9
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3
4/
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/
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5/
7
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3
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3
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/
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2
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/
8
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3
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2
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3
11
/
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/
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/
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Hollowell Groundwater Gauge WG-2 (W4)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
Hydrologic Criteria Met
52 days: 22.51% of Growing Season End of MY4 Data
10/2/2023
0
0.5
1
1.5
2
2.5
3
-30
-25
-20
-15
-10
-5
0
5
10
1/
1
/
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0
2
3
1/
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3
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3
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Hollowell Groundwater Gauge WG -3 (W4a)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
10/2/2023
Hydrologic Criteria Met
91 days: 39.39% of Growing Season
0
0.5
1
1.5
2
2.5
3
-30
-25
-20
-15
-10
-5
0
5
10
1/
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1/
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3
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Hollowell Groundwater Gauge WG-4 (W3)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
9/28/2023
Hydrologic Criteria Met
30 days: 12.99% of Growing Season

0
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1
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2.5
3
-30
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Hollowell Groundwater Gauge WG -5 (W3a)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
9/28/2023
Hydrologic Criteria Met
56 days: 24.24% of Growing Season
0
0.5
1
1.5
2
2.5
3
-30
-25
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-10
-5
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10
1/
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1/
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1
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2/
2
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3/
1
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3/
2
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3
4/
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4/
2
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2
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2
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3
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1
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2
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1
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Hollowell Groundwater Gauge WG-6 (W2)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
9/28/2023
Hydrologic Criteria Met
192 days: 83.12% of Growing Season
0
0.5
1
1.5
2
2.5
3
-30
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3
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Hollowell Groundwater Gauge WG -7 (W2a)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
9/28/2023
Hydrologic Criteria Met
133 days: 57.58% of Growing Season
0
0.5
1
1.5
2
2.5
3
-30
-25
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-5
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/
2
0
2
3
5/
2
1
/
2
0
2
3
6/
4
/
2
0
2
3
6/
1
8
/
2
0
2
3
7/
2
/
2
0
2
3
7/
1
6
/
2
0
2
3
7/
3
0
/
2
0
2
3
8/
1
3
/
2
0
2
3
8/
2
7
/
2
0
2
3
9/
1
0
/
2
0
2
3
9/
2
4
/
2
0
2
3
10
/
8
/
2
0
2
3
10
/
2
2
/
2
0
2
3
11
/
5
/
2
0
2
3
11
/
1
9
/
2
0
2
3
12
/
3
/
2
0
2
3
12
/
1
7
/
2
0
2
3
12
/
3
1
/
2
0
2
3
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Hollowell Groundwater Gauge WG-8 (W1)
Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season
End of MY4 Data
9/28/2023
Hydrologic Criteria Not Met
7 days: 3.03% of Growing Season

Appendix F: Correspondence
MY3 Credit Release Comment Response

waterlandsolutions.com | 7721 Six Forks Rd, Ste 130, Raleigh, NC 27615 | 919-614-5111

WLS Memo

WLS Neuse 01 Umbrella Mitigation Banking Instrument
Hollowell Mitigation Site
USACE Action ID#: SAW-2017-00159

Subject: Hollowell MY3 Credit Release Comments
Date Prepared: November 21st, 2023

This memo addresses the North Carolina Interagency Review Team (NCIRT) comments on the Hollowell
MY3 report. These comments were provided via letter/email by Todd Tugwell on December 21st, 2022.
WLS is providing our written responses to the NCIRT’s review comments below. Each of the NCIRT review
comments is copied below in bold text, followed by the appropriate response from WLS in regular text:

Todd Bowers, EPA Comments

1. Headwater streams are showing some signs of channel formation but far from a preponderance
of evidence. The best stream only has 4 of the 9 indicators, with some streams showing fewer
from year to year. How many factors or indicators are considered “preponderance”? Response:
Both UT1-R1 and UT2-R1 had all nine channel forming indicators observed in MY4. UT2A displayed
eight of the nine indicators. This is a marked improvement from MY3, which consisted of four, four,
and three indicators respectively.

2. The MY3 planform geometry and dimensions fall within acceptable ranges of the design
parameters for all restored reaches. Noted. Response: WLS will continue to monitor stream
morphology.

3. Beaver activity on lower 100 feet of UT1-R2 with negligible impact noted. WLS taking corrective
action. Response: There was no notable beaver activity/impacts within the easement noted in
MY4.

4. Intermittent stream flows of >30 consecutive days verified for MY3 in an abnormally dry year.
Noted. Response: WLS will continue to monitor and record all flow gauges and rainfall data.

5. Plentiful bankfull events on perennial streams noted. Response: WLS will continue to monitor and
report crest gauge and bankfull event data.

6. All vegetation plots appear to be performing very well in density (538 stems/acre) and diversity.
Growth could be better (average height 3.0 feet) but not yet a cause for concern. Response: WLS
waterlandsolutions.com | 7721 Six Forks Rd, Ste 130, Raleigh, NC 27615 | 919-614-5111

will continue to monitor vegetation plots and report average heights.

7. Noted encroachments have been dealt with satisfactorily with new boundary markings and
replanted areas; thank you for including photos post-corrective action. Response: WLS
appreciates the acknowledgement of the included encroachment maintenance photos.

8. I appreciated the detail in the photos of veg plots and cross sections. Only request is to have the
perpendicular angle of the culverts included with the cross sections. Response: Perpendicular
angles of banks at culvert photo stations have been added to the photo log.

9. Recommend providing the entire previous year of rainfall data so that 3 of 12 months prior to
monitoring is not missing. These graphs are great at illustrating the lack of rain in the spring and
that a wet month in the summer can make a huge difference in a dry year. Response: Rainfall data
from November and December 2022 has been added to the rainfall graph in Appendix E.

10. Corrective action for two vegetation problem areas were undertaken in December 2021 and
replanted areas appear to be establishing themselves well. Noted. Response: Both of these
vegetation problem areas have stabilized after repairs were completed and been removed as of
MY4.

11. No invasive species treatments in MY3. Noted. Response: WLS will continue to treat invasives on
an as-needed basis.

12. Macroinvertebrates are becoming re-established and recovering in UT1 and UT2. Noted.
Response: Macroinvertebrates will be re-surveyed again in MY7.

Casey Haywood, USACE Comments

1. Concur with EPAs first comment. However, the drone footage and use of dye was very helpful
for this review. In addition to the drone footage, please include an adequate number of photos
in future monitoring reports to continue to help document indicators of channel formation.
Response: Both UT1-R1 and UT2-R1 had all nine channel forming indicators observed in MY4. UT2A
displayed eight of the nine indicators. This is a marked improvement from MY3, which consisted of
four, four, and three indicators respectively. WLS will continue to include drone footage and photos
of headwater channels.

2. Please include the location of the beaver activity on UT1-R2 on the CCPV in future reports.
Response: In MY3, the beaver activity was located outside of the easement in the pond north of
UT1-R2. There was no notable beaver activity/impacts within the easement noted in MY4. Any
future beaver activity within the easement will be included on the CCPV.

Erin Davis, NCDWR Comments

1. DWR appreciated the level of detail provided in this report, including the CCPV, photos and
responses to MY2 IRT comments. Response: WLS appreciates the acknowledgement of detail
within the report.
waterlandsolutions.com | 7721 Six Forks Rd, Ste 130, Raleigh, NC 27615 | 919-614-5111

2. DWR was glad that thorough signing/taping and planting actions were completed to address the
2021 encroachments. Response: WLS will continue to address any encroachments promptly if
there are any additional encroachments in the future. The landowner is fully aware of the easement
and improved signage, so there should not be any further issues.

3. Please watch any XS aggradation, particularly if sediment aggradation is tied to in-stream
vegetation cover. Any sediment and/or vegetation channel maintenance should be addressed
early in monitoring in order for the IRT to observe how the system is trending (stream vs wetland)
later in monitoring. Response: WLS will continue to monitor all cross-sections and address any
aggradation as needed. There is less vegetation in the channel this year, and visual assessment did
not indicate any noticeable aggradation. WLS does not think sediment or vegetation channel
maintenance will be needed.