20130455 Ver 1_Year 7 Monitoring Report_2020_20210209

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ID#* 20130455 Version* 1
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Select Reviewer:*
Erin Davis
Initial Review Completed Date 02/09/2021
Mitigation Project Submittal -2/9/2021
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Is this a Prospectus,Technical Proposal or a New Site?* O Yes fJ No
Type of Mitigation Project:*
r Stream rJ Wetlands r Buffer ❑ Nutrient Offset
(Select all that apply)
Project Contact Information
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Contact Name:* Email Address:*
Lindsay Crocker [e-mail]
Project Information
ID#:* 20130455 Version:*1
Existing Il) Existing Version
Project Type: F DMS r Mitigation Bank
Project Name: Twin Bays
County: Duplin
Document Information
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Mitigation Document Type:*
Mitigation Monitoring Report
File Upload: Twin Bays_95363_MY07_2020.pdf 27.05MB
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may atereet

Monitoring Report
Twin Bays Wetland Restoration Site
DMS Contract 004739
DMS Project Number 95363
Duplin County, NC
CU #:03030007
DWR #: 2013-0455
USACE #: SAW-2012-01385
Monitoring Year 07
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Prepared for:
NCDMS, 1652 Mail Service Center, Raleigh,NC 27699-1652
Construction Completed: March 2014
Data Collection: 2020
Submitted: December 2020

Design and Monitoring Firm
11.
K C I
ASSOCIATES OF NC
4505 Falls of Neuse Road
Suite 400
Raleigh,NC 27609
Phone: [phone]
Fax: [phone]
Project Contact: Tim Morris
Email: tim.morris(a�kci.com
KCI Project No: 20122265

KC I ENGINEERS • SCIENTISTS • SURVEYORS • CONSTRUCTION MANAGERS
ASSOCIATES OF
NORTH CAROLINA, PA 4505 Falls of Neuse Road Suite 400 Raleigh,NC 27609 [phone] [phone] Fax
MEMORANDUM
Date: February 2, 2021
To: Lindsay Crocker, DMS Project Manager
From: Tim Morris, Project Manager
KCI Associates of North Carolina,PA
Subject: MY-07 Monitoring Report Comments
Twin Bays IMS#95363, Contract 004739
Cape Fear River Basin CU 03030007
Duplin County,North Carolina
Please find below our responses in italics to the MY-07 Monitoring Report comments from NCDMS
received on January 19, 2021, for the Twin Bays Restoration Site.
1. Provide an explanation why KCI thinks the gauge 14 is not meeting success for this year.
KCI Response:A discussion of this gauge has been added to the narrative section of the report.
Additionally,pictures and a discussion of the two soil profiles taken near the gauge have been
added to the report.
2. Please submit the photo point features included in the CCPV.
Please include the feature displaying the bare area in the CCPV.
Please submit a shapefile containing all the groundwater gauges.
KCI Response: Shapefile for the photo points,privet treatment area, and groundwater gauges
have been added to the digital deliverables.
Please contact me if you have any questions or would like clarification concerning these responses.
Sincerely,
Tim Morris
Project Manager
KCI ASSOCIATES OF NORTH CAROLINA, P.A. www.kci.com
Employee-Owned Since 1988

TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY/PROJECT ABSTRACT 1
2.0 MONITORING RESULTS 2
2.1 Vegetation Monitoring 2
2.2 Hydrology Monitoring 2
3.0 REFERENCES 4
Appendix A—Project Vicinity Map and Background Tables
Figure 1.Project Site Vicinity Map 6
Table 1 —Project Components 7
Table 2—Project Activity and Reporting History 8
Table 3 —Project Contacts 9
Table 4—Project Attributes 10
Appendix B—Visual Assessment Data
Figure 2. Current Condition Plan View 12
Table 5 —Vegetation Condition Assessment 13
Photo Point Photos 14
Soil Profiles Taken Near Gauge 14 18
Appendix C —Vegetation Plot Data
Table 6—CVS Stem Count Total and Planted by Plot and Species 20
Appendix D —Hydrologic Data
30-70 Percentile Graph 22
Precipitation and Water Level Plots 23
Table 7—Wetland Hydrology Criteria Attainment 42
Appendix E —Additional Information
IRT Field Review Memo— 10/30/2019 44
Twin Bays Wetland Restoration Site KCIAssociates of NC,PA
DMS Project#95363 2020—MY07

1.0 EXECUTIVE SUMMARY/PROJECT ABSTRACT
The Twin Bays Wetland Restoration Site, (TBWRS) completed in March 2014, restored 10.6 acres of
non-riparian wetland along with 0.4 acre of upland preservation. The TBWRS is a non-riparian wetland
system in the Cape Fear Basin (03030007 8-digit HUC) in southern Duplin County,North Carolina. The
project is located in the 14-digit HUC 03030007090040 (Rock Fish Creek), which DMS has identified as
a Targeted Local Watershed(TLW)(NCDENR,EEP 2009).
The project site is protected by an 11.72-acre permanent conservation easement held by the State of North
Carolina. TBWRS is located on a single parcel located off of Cornwallis Road approximately two miles
northwest of Wallace,North Carolina. The project site is bounded by Cornwallis Road to the west, a ditch
along the property line to the south, and agricultural land to the east and north. Prior to construction, the
site was actively used for row crop farming. The site had a long history of hydrologic modification in
order to allow for farming to take place on the property.
The Cape Fear River Basin Restoration Priorities state the goals for the TBWRS's 14-digit HUC are to
expand restoration opportunities and repair riparian buffers (NCDENR EEP, 2009). The project goals for
TBWRS are in line with the basin priorities and include the following:
- Slow and treat the runoff of upslope agricultural drainage.
- Restore a Hardwood Flats Community.
- Develop valuable wetland habitat niches within a drained agricultural landscape.
The project goals will be addressed through the following objectives:
- Fill field ditches to restore surface flow retention and elevate local groundwater levels.
- Redevelop longer wetland flow patterns to increase surface flow retention time.
- Modify an existing pond to its natural seep condition to feed the downslope wetland.
- Restore a native forested hardwood wetland community using natives trees and seed mixes.
There are three non-credit generating areas on the site. There is 0.4-acre of uplands located in the forested
northeastern corner of the project boundary. This area remained undisturbed and is included in the
TBWRS conservation easement. There is a 0.2 acre utility easement on the west side of the site along
Cornwallis Road that remained undisturbed. Additionally, the southernmost ditch, located adjacent to the
project easement, was left open and not filled. It is anticipated that leaving this ditch open will have
minimal impacts to the overall hydrologic performance of the site. The hydrologic influence of this ditch
was modeled using Lateral Effect, a software program that determines the lateral effect of a drainage
ditch or borrow pit on adjacent wetland hydrology(NCSU BAE, 2011). This analysis determined that the
potential horizontal drainage influence averages 76'. Due to the fact that the southern ditch cannot be
filled because of the potential for hydrologic trespass,the area immediately adjacent to the ditch will not
be a credit generating part of the site. It is assumed that with the onsite modifications, such as filling
ditches and surface roughening, the entire site will have more surface and groundwater, which may
decrease the effect of the ditch. For this reason,the non-credit generating portion of the site is assumed to
be half of the zone of influence for the ditch.
The TBWRS provided mitigation for wetland impacts within Hydrologic Unit 03030007 by restoring
10.6 acres of wetland and preserving 0.4-acre of uplands, generating 10.6 riparian wetland mitigation
units (WMU's). The TBWRS will be monitored to determine if the project is on-track to meeting
jurisdictional wetland status. The wetland site will be deemed successful once hydrology is established
and vegetation success criteria are met. During the site's seventh growing season, vegetation monitoring
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 1 2020—MY07

did not take place as stipulated by the IRT. Sixteen of the seventeen credit bearing groundwater
monitoring gauges met the success criteria. Chinese privet(Ligustrum sinense) growing in the two fingers
near the northeast corner of the site was cut and sprayed with herbicide in August 2018. An additional
treatment of privet growing in these areas was completed in August 2020. Additional easement markers
were also installed in August 2020 along the northeastern boundary of the site where a small amount of
encroachment had been noted.
Summary information/data related to the occurrence of items such as encroachment and statistics related
to performance of various project and monitoring elements can be found in the tables and figures in the
report appendices. Narrative background and supporting information formerly found in these reports can
be found in the Baseline Monitoring Report and in the Mitigation Plan documents available on the DMS
website. All raw data supporting the tables and figures in the appendices are available from DMS upon
request.
2.0 MONITORING RESULTS
The TBWRS will be monitored to determine if the project is on-track to meeting jurisdictional wetland
status. The wetland restoration area will be deemed successful once hydrology is established and
vegetation success criteria are met. The site will be monitored for at least seven years or until the success
criteria are achieved.
2.1 VEGETATION MONITORING
The success criteria for the planted species in the mitigation area is based on the vegetative density
estimated as woody stems/acre based on monitoring plot data. The site will demonstrate the re-
establishment of targeted vegetative communities through the survival and growth of planted species and
volunteer colonization, with an average stem density of 320 stems/acre after three years, 288 stems/acre
after four years, 260 stems/acre after five years, and 210 stems/acre after seven years to be considered
successful. To determine the success of the planted mitigation area,ten permanent vegetation monitoring
plots (10 by 10 meters) have been established in the wetland restoration area at a density that represents
the total mitigation acreage. The average density of these plots will determine whether the site meets the
success criterion.
During an onsite meeting with the IRT on October 30,2019,it was determined that vegetation monitoring
did not need to be performed during Monitoring Year 7, due to the overwhelming success of the
vegetation on site.
2.2 HYDROLOGY MONITORING
Wetland hydrology is monitored with a series of automatic gauges that record water table depth. The site
must present continuous saturated or inundated hydrologic conditions for at least 8% of the growing
season with a 50% probability of reoccurrence during normal weather conditions. A "normal" year is
based on NRCS climatological data for Duplin County using the 30th to 70th percentile thresholds as the
range of normal as documented in the USACE Technical Report "Accessing and Using Meteorological
Data to Evaluate Wetland Hydrology, April 2000." The soil survey for Duplin County does not contain
growing season data; therefore, due to its close proximity,the Sampson County soil survey was used. The
estimated growing season begins March 18 and ends November 11 (239 days). The water table of the
restored wetlands must be within 12" of the soils surface continuously for at least 8% (19 days) of the
239-day growing season. Wetland hydrology will be monitored with nineteen automatic gauges that
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 2 2020—MY07

record water table depth. Daily data is collected from the automatic gauges over the 7-year monitoring
period.
To monitor the effect of the unfilled ditch described in Section 1.0, four sets of coupled gauges were
installed perpendicular to the unfilled ditch. Each set includes a gauge that is 40' from the open ditch and
another that is 75' from the ditch.An additional two gauges were installed between the coupled gauges to
monitor hydrology less than 40' from the open ditch in the non-credit bearing zone.
The daily rainfall data were obtained from the NC State Climate Office for a local weather station in
Jacksonville, NC. In 2020, the months of February, May, September, and November experienced above
average rainfall, while January, March, April, June, August, October experienced average rainfall. The
month of July recorded below average rainfall for the site. Overall, the area experienced above average
rainfall during the 2020 growing season.
During the site's seventh growing season, sixteen of the seventeen credit-bearing gauges met the
hydrologic success criteria. The gauge that did not meet the success criteria was Gauge 14. This gauge is
located near the upper limit of the elevations on site and as such would be expected to be the driest of the
gauges on site. Despite being located in the driest part of the site,this gauge has met the success criteria in
4 out of the 7 monitoring years. A soil profile taken next to the gauge on January 12, 2021 showed
evidence of higher chroma soils, but another profile taken approximately 3 feet away from the gauge
showed a depleted matrix with redox concentrations. This indicates that the borderline hydrology that this
gauge has demonstrated throughout the monitoring period is a localized occurrence and that more robust
wetland hydrology exists in close proximity to the gauge. Please see Appendix B —Visual Assessment
Data for pictures of these soil profiles. One of the two non-credit bearing gauges achieved the success
criteria this year. This gauge (Gauge 6) has met the hydrology success criteria every previous growing
season except for the first.
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 3 2020—MY07

3.0 REFERENCES
Lee,M.T.,R.K. Peet, S.D.Roberts,and T.R. Wentworth. 2008. CVS-EEP Protocol for Recording
Vegetation,Version 4.2(http://cvs.bio.unc.edu/methods.htm)
NCDENR,Ecosystem Enhancement Program. 2009. Lower Yadkin Pee-Dee River Basin
Priorities 2009. Raleigh,NC.
http://www.nceep.net/services/restplans/Yadkin_Pee_Dee_RBRP_2009 Final.pdf
NCSU BAE.North Carolina State University,Biological and Agricultural Engineering. 2011.
Method to Determine Lateral Effect of a Drainage Ditch on Adjacent Wetland
Hydrology. Last accessed 11/2012 at:
http://www.bae.ncsu.edu/soil water/projects/lateraleffect.html
USACE. 2003. Stream Mitigation Guidelines.USACE,NCDENR-DWQ,USEPA,NCWRC.
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 4 2020—MY07

Appendix A
Project Vicinity Map and Background Tables
Twin Bays Wetland Restoration Site KCI Associates of NC PA
DMS Project#95363 5 2020—MY07

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Table 1.Project Components and Mitigation Credits
Twin Bays Wetland Restoration Site,DMS Project#95363
Mitigation Credits
Riparian Non-riparian Nitrogen Phosphorous
Stream Wetland Wetland Buffer Nutrient Nutrient
Offset Offset
Type R RE R RE R RE
Acres 10.6
Credits 10.6
TOTAL
CREDITS 10.6
Project Components
Project Restoration
Component Stationing/ Existing Approach -or- Restoration Mitigation
-or- Location Footage/ (PI PII etc.) Restoration Footage Ratio
Reach ID Acreage Equivalent or Acreage
Central and
Wetland Area Southern portion 10.6 acres - Restoration 10.6 acres 1:1
of project
easement
Component Summation
Restoration Stream Riparian Wetland Non-riparian Wetland Buffer
Level (linear feet) (acres) (acres) (square Upland(acres)
feet)
Non-
Riverine
Riverine
Restoration 10.6 acres
Enhancement
Enhancement I
Enhancement II
Creation
Preservation 0.4 acre
High Quality
Preservation
TOTAL - - - 10.6 acres - 0.4 acre
TOTAL - - - 10.6 - -
WMU
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 7 2020—MY07

Table 2. Project Activity& Reporting History
Twin Bays Wetland Restoration Site,DMS Project#95363
Data Collection Actual Completion or
Activity or Report Complete Delivery
Mitigation Plan Oct 2013
Final Design-Construction Plans Dec 2013
Construction LFeb/March 2014
Planting March 2014
Baseline Monitoring/Report April 2014 May 2014
Vegetation Monitoring April 10,2014
Photo Points April 10,2015
Year 1 Monitoring Nov 2014 Dec 2014
Vegetation Monitoring Nov 3,2014
Photo Points Nov 3,2014
Gauge Download Nov 2017,2014
Supplemental Planting March 2015
Year 2 Monitoring Nov 2015 Jan 2016
Vegetation Monitoring July 30,2015 Mr1—
Photo Points July 30,2015
Gauge Download Nov 25,2015
Year 3 Monitoring Dec 2016 Dec 2016
Vegetation Monitoring July 6,2016
Photo Points Aug 23,2016
Gauge Download Dec 14,2016
Year 4 Monitoring Nov 2017 Dec 2017
Vegetation Monitoring N/A
Photo Points Nov 30,2017
Gauge Download Nov 30,2017
Year 5 Monitoring Nov 2018 Dec 2018
Vegetation Monitoring July 13,2018
Photo Points Nov 13,2018 MI —
Gauge Download Nov 13,2018
Invasive Treatment August 6,2018
Year 6 Monitoring Nov 2019 Dec 2019
Vegetation Monitoring N/A
Photo Points Nov 13,2019
Gauge Download Nov 13,2019
Invasive Treatment August 13,2020
Year 7 Monitoring Nov 2020 Dec 2020
Vegetation Monitoring N/A
Photo Points Nov 20,2020
Gauge Download Nov 20,2020
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 8 2020—MY07

Table 3.Project Contacts
Twin Bays Wetland Restoration Site,DMS Project#95363
Design Firm KCI Associates of North Carolina,PA
4505 Falls of Neuse Rd.
Suite 400
Raleigh,NC 27609
Contact:Mr.Tim Morris
Phone:[phone]
Fax:[phone]
Construction Contractor KCI Environmental Technologies and
Construction,Inc.
4505 Falls of Neuse Rd.
Suite 400
Raleigh,NC 27609
Contact:Mr.Tim Morris
Phone:[phone]
Fax:[phone]
Planting Contractor Forestree Management Co.
1280 Maudis Road
Bailey,NC 27807
Contact:Mr.Tony Cortez
Phone:[phone]
Monitoring Performers
KCI Associates of North Carolina,PA
4505 Falls of Neuse Rd.
Suite 400
Raleigh,NC 27609
Contact:Mr.Adam Spiller
Phone:[phone]
Fax:[phone]
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 9 2020—MY07

Table 4.Project Information
Twin Bays Wetland Restoration Site,DMS Project#95363
Project Name Twin Bays Wetland Restoration Site
County Duplin County
Project Area(acres) 11.72 acres
Project Coordinates(lat.and 34.748418 N,-78.027129 W
long.)
Project Watershed Summary Information
Physiographic Province Coastal Plain
River Basin Cape Fear
USGS Hydrologic Unit 8-digit 03030007 USGS Hydrologic Unit 14-digit 03030007090040
DWQ Sub-basin 18-74-29b
Project Drainage Area(acres) 25.4 acres
Project Drainage Area 2%
Percentage of Impervious Area
CGIA Land Use Classification 93%Cultivated,2%Mixed Shrubland,and 5%Low-Intensity Development
Wetland Summary Information(Post-Restoration)
Parameters Wetland Area
Size of Wetland(acres) 10.6 acres
Wetland Type(non-riparian,
riparian riverine or riparian non- Non-riparian
riverine)
Mapped Soil Series Rains
(Torhunta,Murville/Leon and Udorthents by detailed soil investigation)
Drainage class Poorly drained
Soil Hydric Status Drained Hydric
Source of Hydrology Hillside seepage/precipitation
Hydrologic Impairment Ditching and Crops
Native vegetation community Hardwood Flats Community
Percent composition of exotic 0%
invasive vegetation
Regulatory Considerations
Regulation Applicable? Resolved? Supporting
Documentation
Waters of the United States- Yes Yes,received 404 N/A
Section 404 permit
Waters of the United States- Yes Yes,received 401 N/A
Section 401 permit
Endangered Species Act* No N/A N/A
Historic Preservation Act* No N/A N/A
Coastal Zone Management Act*
(CZMA)/Coastal Area No N/A N/A
Management Act(CAMA)
FEMA Floodplain Compliance No N/A FEMA Floodplain
Checklist
Essential Fisheries Habitat* No N/A N/A
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 10 2020-MY07

Appendix B
Visual Assessment Data
Twin Bays Wetland Restoration Site KCI Associates of NC PA
DMS Project#95363 11 2020—MY07

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•
• ''' • VEG PLOT ACHIEVING
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Table 5.Vegetation Condition Assessment
Twin Bays Restoration Site,DMS Project#95363
Planted Acreage 10.6 Easement Acreage 11.7
CCPV Number of Combined
Vegetation Category Definitions Mapping Threshold Depiction Polygons Acreage %of Planted Acreage
Very limited cover of both woody Pattern and
1. Bare Areas 0.1 acre 0 0.00 0.0%
and herbaceous material. Color
Woody stem densities clearly below
2. Low Stem Density Pattern and
Areas target levels based on MY3,4,or 5 0.1 acre Color 0 0.00 0.0%
stem count criteria.
Total 0 0.00 0.0%
3.Areas of Poor Areas with woody stems of a size Pattern and
class that are obviously small given 0.25 acre 0 0.00 0.0%
Growth Rates or Vigor Color
the monitoring year.
Cumulative Total 0 0.00 0.0%
4.Invasive Areas of Areas or points(if too small to Pattern and
Concern render as polygons at map scale). 1,000 SF Color 0 0.00 0.0%
5.Easement Areas or points(if too small to Pattern and
Encroachment Areas render as polygons at map scale). none Color 0 0.00 0.0%
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 13 2020—MY07

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DMS Project#95363 14 2020 MY07

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DMS Project#95363 16 2020—MY07

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Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 17 2020 MYO7

Soi1 Profiles Taken Near Gauge 14
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Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 18 2020 MY07

Appendix C
Vegetation Plot Data
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 19 2020—MY07

Table 6.CVS Stem Count Total and Planted by Plot and Species
DMS Project Code 95363. Project Name:Twin Bays Restoration Site
Annual Means
MY5(2018) MY3(2016) MY2(2015) MY1(2014) MY()(2014)
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
Acer rubrum red maple Tree 3 3 32 3 3 9 3 3 9 3 3 7 5 5 5
Aronia arbutifolia Red Chokeberry Shrub 8 8 8 8 8 11 7 7 7 8 8 8 11 11 11
Baccharis baccharis Shrub 16 12
Baccharis halimifolia eastern baccharis Shrub 2 11 7
Betula nigra river birch Tree 49 49 49 49 49 49 48 48 48 48 48 48 47 47 47
Diospyros virginiana common persimmon Tree 1
Fraxinus pennsylvanica green ash Tree 26 26 26 25 25 25 26 26 26 24 24 24 5 5 5
Juglans nigra black walnut Tree 1
Liquidambarstyraciflua sweetgum Tree 4 1 1 1
Liriodendron tulipifera tuliptree Tree 2 2 2 3 3 3 3 3 3 1 1 1 18 18 18
Magnolia virginiana sweetbay Tree 16 16 16 15 15 15 15 15 15 13 13 13 17 17 17
Nyssa biflora swamp tupelo Tree 5
Pinus taeda loblolly pine Tree 42 2
Platanus occidentalis American sycamore Tree 3 3 10 3 3 4 3 3 7 3 3 3
Quercus michauxii swamp chestnut oak Tree 59 59 59 59 59 59 59 59 59 54 54 54
Quercus pagoda cherrybark oak Tree 20 20 29 21 21 23 21 21 22 23 23 23 22 22 22
Quercus palustris pin oak Tree 1 1 1 1 1 1
Quercus phellos willow oak Tree 20 20 21 20 20 20 20 20 20 9 9 9
Salix nigra black willow Tree 11 7 2 3
Sambucus elderberry Shrub 2
Sambucus canadensis Common Elderberry Shrub 3
Taxodium distichum bald cypress Tree 18 18 19 18 18 18 16 16 16 6 6 6 1 1 1
Ulmus americana American elm Tree 8 8 8
Unknown Shrub or Tree 10 10 10 104 104 104
Vaccinium corymbosum highbush blueberry Shrub 18 18 20 19 19 19 22 22 22 20 20 20 22 22 22
Stem count 243 243 368 244 244 281 243 243 276 222 222 237 260 260 260
size(ares) 10 10 10 10 10
size(ACRES) 0.25 0.25 0.25 0.25 0.25
Species count 13 13 19 13 13 19 12 12 17 13 13 16 11 11 11
Stems per ACRE 983 983 1489 987 987 1137 983 983 1117 898 898 959 1052 1052 1052
Twin Bays Wetland Restoration Site KCI Associates of NC PA
DMS Project#95363 20 2020—MY07

Appendix D
Hydrologic Data
Twin Bays Wetland Restoration Site KCI Associates of NC,PA
DMS Project#95363 21 2020—MY07

Twin Bays Wetland Restoration Site
30-70 Percentile Graph
WETS Station Name: Warsaw, NC
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Date
2019 Rainfall 2020 Rainfall f 30%Less Than f 30%Greater Than

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 1
504 - w - 4.5
Begin Growing Season End Growing Season
March 18 November 11
503 - -
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Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 2
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 3 - non-credit bearing
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March 18 November 11
- 4.0
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Rainfall Groundwater Depth - Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 4
502 - 4.5
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March 18 November 11
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Date
Rainfall Groundwater Depth Ground Surface - 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 5
502 4.5
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Date
Rainfall Groundwater Depth Ground Surface - 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 6 - non-credit bearing
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Date
Rainfall Groundwater Depth Ground Surface - 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 7
502 - - 4.5
Begin Growing Season End Growing Season
March 18 November 11
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Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 8
502 - 4.5
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Twin Bays Restoration Site
Hydrograph
Wetland Gauge 9
502 4.5
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Date
Rainfall Groundwater Depth —Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 10
502 - 4.5
Begin Growig Season End Growing Season
March 18 November 11
4.0
501 - Gauge malfunction
3.5
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 11
502 4.5
Begin Growing Season End Growing Season
March 18 November 11
Gauge malfunction - 4.0
501 -
- 3.5
ljt\t
500 vItS 3.0
o
ct
- 2.5 E.
43 Days 15
W 499 - 4 ►�
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a 498 - - 1.5
C7
- 1.0
497 -
- 0.5
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 12
502 - - 4.5
Begin Growing Season End Growing Season
March 18 November 11
- 4.0
501 3.5
Gauge malfunction
1 \ k111j41\1/\\‘1\1\11
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0
s,
1.0
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D ate
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 13
502 4.5
Begin Growin;Season End Growing Season
March 18 November 11
4.0
501 -
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 14
502 4.5
Begin Growing Season End Growing Season
March 18 November 11
4.0
501
3.5
11 Days
w 500 3.0
1
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Date
Rainfall Groundwater Depth Ground Surface -12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 15
502 - 4.5
Begin Growing Season End Growing Season
March 18 November 11
- 4.0
501
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 16
502 - 4.5
Begin Growing Season End Growing Season
March 18 November 11
- 4.0
501
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500 . it I di. 6"� i " L 3.0
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 17
502 - - 4.5
Begin Growing Season End Growing Season
March 18 November 11
- 4.0
501 -
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Date
Rainfall Groundwater Depth —Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 18
502 — - 4.5
Begin Growing Season End Growing Season
March 18 November 11
- 4.0
501
Gauge malfunction - 3.5
500 3.0
0
1:1 2‘111)1 .5
ct
24 Days I 1-
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D ate
Rainfall Groundwater Depth - Ground Surface 12 Inches Below Ground Surface Sensor Depth

Twin Bays Restoration Site
Hydrograph
Wetland Gauge 19
502 4.5
Begin Growing Season End Growing Season
March 18 November 11
4.0
501 -
3.5
500 - 3.0
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1.0
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w N o 0 00 in - o C 0o J - w - o o o v w N — oo J - w - o 0 o v w N
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O o Q N S" S" S" 7 w w 7 a '-a w w w N 'r 'r 'r vc 'Y c o o 2 2 2
c c 1 o N N o t&J t&J t&J N N N o N N o O' t) O' N fa vc N N N c c N
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Date
Rainfall Groundwater Depth Ground Surface 12 Inches Below Ground Surface — Sensor Depth

Table 7. Wetland Hydrology Attainment Table
Twin Bays Restoration Site, DMS Project#95363
Greater than 8%Continuous Saturation/Max Consecutive Days
During Growing Season (Percentage)
Gauge# MY-01 MY-02 MY-03 MY-04 MY-05 MY-06 MY-07
2014 2015 2016 2017 2018 2019 2020
Gauge 1 Yes/25 Yes/105 Not/2 No/9 Yes/19 No/5 Yes/77
(10.5%) (43.9%) (0.8%) (3.8%) (8.0%) (2.1%) (32.2%)
Gauge 2 No/16 Yes/75 Yes/36 Yes/30 Yes/49 Yes/41 Yes/22
(6.5%) (31.4%) (14.9%) (12.6%) (20.3%) (16.9%) (9.2%)
Gauge 3* 13 18 10 14 19 9 6
(5.2%) (7.3%) (4.0%) (5.9%) (8.0%) (3.8%) (2.5%)
Gauge 4 Yes/26 Yes/92 Yes/36 Yes/56 Yes/57 No/2$ Yes/56
(10.9%) (38.5%) (15.1%) (23.4%) (23.6%) (0.6%) (23.4%)
Gauge 5 Yes/27 Yes/98 Yes/53 Yes/53 Yes/57 Yes/46 Yes/58
(11.1%) (41.0%) (22.2%) (22.2%) (23.6%) (19.0%) (24.3%)
Gauge 6* 13 41 28 26 47 26 22
(5.4%) (17.2%) (11.5%) (10.9%) (19.7%) (10.9%) (9.2%)
Gauge 7 Yes/27 Yes/75 Yes/36 Yes/51 Yes/56 Yes/46 Yes/55
(11.1%) (31.4%) (14.9%) (21.3%) (23.2%) (19.0%) (23.0%)
Gauge 8 Yes/24 Yes/75 Yes/89 Yes/37 Yes/56 Yes/44 Yes/58
10.0% (31.4%) (37.0%) (15.5%) (23.2%) (18.45) (24.3%)
Gauge 9 No/17 Yes/92 Yes/27 Yes/24 Yes/21 Yes/23 Yes/19
(6.9%) (38.3%) (11.1%) (10.0%) (8.6%) (9.6%) (8.0%)
Gauge 10 Yes/24 Yes/22 Yes/49 Yes/26 Yes/47 Yes/25 Yes/23
(9.8%) (9.2%) (20.5%) (10.9%) (19.7%) (10.3%) (9.6%)
Gauge 11 Yes/28 Yes/100 Yes/92 Yes/58 Yes/57 Yes/47 Yes/43
(11.7%) (41.8%) (38.5% (24.3%) (23.6%) (19.5%) (18.0%)
Gauge 12 No/14 Yes/103 No/18 Yes/26 Yes/34 Yes/23 Yes/21
(5.9%) (43.1%) (7.3%) (10.9%) (14.2%) (9.6%) (8.8%)
Gauge 13 No/15 Yes/74 Yes/54 Yes/41 Yes/56 Yes/44 Yes/56
(6.1%) (30.8%) (22.6%) (17.2%) (23.2%) (18.2%) (23.4%)
Gauge 14 Yes/22 Yes/19 No/13 Yes/24 Yes/19 No/10$ No/11
(9.0%) (8.0%) (5.2%) (10.0%) (8.0%) (4.0%) (4.6%)
Gauge 15 Yes/27 Yes/76 Yes/95 Yes/60 Yes/59 Yes/47 Yes/60
(11.1%) (31.8%) (39.7% (25.1%) (24.5%) (19.5%) (25.1%)
Gauge 16 Yes/49 Yes/76 Yes/59 Yes/58 Yes/58 Yes/46 Yes/59
20.3% (31.8%) (24.5%) (24.3%) (24.1%) (19.0%) (24.7%)
Gauge 17**
Yes/104 Yes/103 Yes/73 Yes/118 Yes/55 Yes/125
(43.5%) (42.9%) (30.5%) (49.2%) (22.8%) (52.3%)
Gauge 18t Yes/58 Yes/48 Yes/41 Yes/24
(24.3%) (19.9%) (16.9%) (10.0%)
Gauge 19t No/15 Yes/36 Yes/23 Yes/20
(6.3%) (14.9%) (9.6%) (8.4%)
*=Gauge in the non-credit bearing zone t=Gauge installed 4/6/2017
**=Gauge installed 3/8/2015 #=Gauge malfunctioned
Twin Bays Wetland Restoration Site KCI Associates of NC;PA
DMS Project#95363 42 2020-MY07

Appendix E
Additional Information
Twin Bays Wetland Restoration Site KCI Associates of NC;PA
DMS Project#95363 43 2020—MY07

ISO 9001:2015 CERTIFIED
, ENGINEERS • PLANNERS • SCIENTISTS • CONSTRUCTION MANAGERS
Kc I 4505 Falls of Neuse Rd.,Suite 400• Raleigh,NC 27609•Phone [phone]•Fax [phone]
ASSOCIATES OF NC
Date: October 30, 2019
Attendees: Lindsay Crocker, NC Division of Mitigation Services
Jeremiah Dow, NC Division of Mitigation Services
Jeff Schaffer, NC Division of Mitigation Services
Mac Haupt, NC Division of Water Resources
Erin Davis, Division of Water Resources
Todd Tugwell, US Army Corps of Engineers
Jordan Jessop, US Army Corps of Engineers
Tim Morris, KCI Technologies, Inc.
Kevin O'Briant, KCI Technologies, Inc.
From: Tim Morris, Project Manager
KCI Technologies, Inc.
Subject: Twin Bays Project
Non-Riparian Wetland Mitigation—Cape Fear 07
Credit Release—Field Review
Duplin County, North Carolina
Purpose
A field review meeting was conducted for the above referenced project on October 30, 2019. The purpose
of the meeting was to visit the site on the ground since the IRT had not been to the site since the post
contract site walk. No significant performance issues were noted in the monitoring reports leading up to
the meeting.
Meeting Minutes
Vegetation (trees, shrubs and herbaceous) was thriving at the site. The IRT commented on the diversity
of trees and shrubs throughout the site. In some areas there was full canopy closure and herbaceous
vegetation was already being shaded out. Based on the health and vigor of the vegetation the IRT agreed
that no additional vegetation monitoring would be required for the Year 6 monitoring report.
Some privet was noted around the forested bays at the top of the project. This privet would continue to
be treated as part of the on-going maintenance program.
Some minor scalping of the easement along the field edges on the north end of the easement was noted.
KCI called the landowner and informed him of the issue and also will install additional signage to prevent
this from occurring in the future monitoring years.
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