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HomeMy WebLinkAbout20120916 Ver 1_Year 4 Monitoring Report 2017_20180206UT to Mill Swamp Restoration Project Fifth Monitoring Measurement Fourth Year of Credit Release - Final Onslow County, North Carolina DMS Project ID Number — 95019, DEQ Contract No. 003992 USACE Action ID: SAW -2011-02193, DWR# 20120916 Project Info: Credit Release Year: 4 of 7 (Fifth site measurement since construction) Year of Data Collection: 2017 Year of Completed Construction: 2013 Submission Date: January 2018 Submitted To: NCDEQ — Division of Mitigation Services 1652 Mail Service Center Raleigh, NC 27699-1652 Innovation Done Right ...We Make o Difference ference I N T E R N AT 1 0 N A L February 12, 2018 Jeff Schaffer Eastern Supervisor, Project Management NCDEQ Division of Mitigation Services 1652 Mail Service Center Raleigh, NC 27699-1652 Subject: Task 10: Response Letter to DMS review comments regarding the Draft Year 4 Monitoring Report for the UT to Mill Swamp Restoration Project (#95019) White Oak River Basin — CU#03030001, Onslow County, North Carolina DEQ Contract No. 003992, Baker No. 124578 Dear Mr. Schaffer, Please find enclosed the Final Year 4 Monitoring Report and our responses to your review comments received on January 29, 2018 regarding the UT to Mill Swamp Restoration Project located in Onslow County, NC. We have also provided the final digital files and required documentation in response to the referenced review comments below: 1. During the April 3, 2017 Credit Release meeting, the IRT decided that the assets for this project were to revert to those contained in the approved Mitigation Plan for stream and wetland credits. The approved stream credit is a total of 3,909 based on using headwater valley length for UTIb. The wetland credit reverted to 4.0 acres at a 1:1 ratio. Throughout this report, Baker is using assets and credits from both the approved mitigation plan and the as -built baseline report. Please change all references to linear footages, acres and credits in the report narrative to reflect the approved numbers. Response: All references to the assets and credits were revised in the applicable report tables and narrative as requested. 2. Digital drawings: a. Digital files for each asset listed in Table 1 were provided in CADD but were not formatted or attributed as required in the EEP/DMS digital drawing guidance. The stream centerlines for example were submitted as a highly segmented polyline and were devoid of attributes such as reach ID. DMS would prefer to receive shapefiles for all of the features in the digital drawings requirements, but at a minimum, each asset (as listed in table 1 of the monitoring report) and each monitoring feature must be provided as a discreet, properly attributed polyline/polygon as required by contract and stated in table 2 of DMS's Format, Data Requirements, and Content Guidance for Electronic Drawings Submitted to EEP version 1.0 (03/27/08). b. In addition, during the review, DMS received a pop up warning that the spatial reference is missing for the As-Built_Streams_UTMillSwamp, Crossings_UTMillSwamp, F1owGauges_UTMillSwamp, TopOfBank_UTMillSwamp, UTMillSwamp_CrestGauge and XSections_UTMillSwamp layers. Michael Baker Engineering, Inc. oma=L�Ji x�asEnunr �sALLYPORT MBAKERINTL.COM 8000 Regency Parkway, Suite 600, Cary NC 27518 Office: 919.463-54881 Fax: 919.463.5490 Innovation Done Pight...We Make a Difference Response: All of the GIS shapefiles were reformatted and reassigned their correct spatial reference as requested. 3. Cover Page: Change the word "Permits:" to USACE Action ID. Response: Cover page was revised as requested. 4. Executive Summary, page 3: In the fifth paragraph, the report states that only 2 gauges are meeting in the wetland restoration area on the north side of UT 1 c and the estimated restored area associated with these 2 gauges is 0.90 acres. Based on this, describe whether Baker will further refine these assets and remove the proposed wetland credits/area where gauges have consistently not met hydrologic success. Please note that the final credit release ledger submitted to the IRT for approval in 2017 requested on 4.00 WMUs per comment #1 above. Response: Baker does not wish to modify the wetland restoration asset area at this time. As elaborated in the report, the start of the growing season was very dry in 2017, usually a wetter period of the year when wells often meet their success criteria. Despite this, several of the wells located in the north side of the UT1c that did not pass were very close (1-3 days) to meeting their 29 -day requirement. Baker wishes to continue monitoring this area through at least one additional monitoring year in which it has received normal rainfall conditions, especially through the late winter/early spring time period. 5. Section 2: Even though the groundwater gauges are discussed in Section 2.2.2, explain why there is no section to specifically discuss the wetland assessment. Section 2.2.2 appears to be more associated with the stream portion of this project. Response: A new wetlands -specific section was added to the report to provide a more detailed assessment and discussion of the wetland restoration areas. 6. Appendix A, Table 1: Update Table 1 as follows: a. Total stream credits in Mitigation Credit section — 3,909 b. Total wetland credits in Mitigation Credit section — 4.0 per the approved mitigation plan. c. Reach UTIb in project components — change SMUs and LF to 1,996 (this HW valley length) d. Wetland Area #1 — change WMUs and AC to 4.0 e. Stream Restoration LF in Component Summation section — 3,909 (3,509) f. Wetland Restoration AC in Component Summation section — 4.0 g. Add the following footnote: * Credit calculations were originally calculated along the as -built thalweg and updated to be calculated along stream centerlines and valley length for Monitoring Year 4 after discussions with NC IRT stemming from the April 3, 2017 Credit Release Meeting. Response: Table 1 was revised as requested. 7. Appendix E, Table 12: Add a footnote to describe whether Baker will further refine wetland assets and remove the proposed wetland credits/area where gauges 2, 6, 9, 10, 20, 21, 22 and 23 have consistently not met hydrologic success. Innovotion Done Right ...We Moke o Difference Response: Baker does not wish to refine wetland assets at this time and will continue to monitor all of the groundwater wells on the project. If you have any questions or require additional information, please feel free to contact me at 919-481-5731 or via email at Scott.King@mbakerintl.com. Sincerely, 14 - Scott King, LSS UT to Mill Swamp Restoration Project Fifth Monitoring Measurement Fourth Year of Credit Release - Final Onslow County, North Carolina NCDMS Project ID Number — 95019, DEQ Contract No. 003992 USACE Action ID: SAW -2011-02193, DWR# 20120916 Report Prepared and Submitted by Michael Baker Engineering, Inc. NC Professional Engineering License # F-1084 INTERNATIONAL MICHAEL BAKER ENGINEERING, INC. I UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY............................................................................1 2.0 METHODOLOGY.........................................................................................4 2.1 Stream Assessment —Reach UTI a & UTI b................................................................................................. 4 2.1.1 Hydrology..................................................................................................................................................4 2.1.2 Photographic Documentation....................................................................................................................4 2.2 Stream Assessment —Reach UTI c............................................................................................................... 4 2.2.1 Morphologic Parameters and Channel Stability........................................................................................5 2.2.2 Hydrology..................................................................................................................................................5 2.2.3 Photographic Documentation....................................................................................................................5 2.2.4 Visual Stream Morphological Stability Assessment..................................................................................5 2.3 Wetland Assessment.....................................................................................................................................5 2.4 Vegetation Assessment................................................................................................................................6 3.0 REFERENCES...............................................................................................7 APPENDICES Appendix A Project Vicinity Map and Background Tables Figure 1 Project Vicinity Map Table 1 Project Components and Mitigation Credits Table 2 Project Activity and Reporting History Table 3 Project Contacts Table 4 Project Attributes Appendix B Visual Assessment Data Figure 2 Current Condition Plan View (CCPV) Map Table 5a Visual Stream Morphology Stability Assessment Table 5b Stream Problem Areas (SPAS) Table 6a Vegetation Condition Assessment Table 6b Vegetation Problem Areas (VPAs) Stream Station Photos Crest Gauge and Flow Camera Photos Vegetation Problem Area Photos Appendix C Vegetation Plot Data* Table 7* Vegetation Plot Criteria Attainment (Planted Stems) Table 8* CVS Vegetation Plot Metadata Table 9a* CVS Stem Count of Planted Stems by Plot and Species Table 9b* Vegetation Stem Count Densities Table 9c* CVS Density Per Plot Table 9d* Vegetation Summary and Totals Appendix D Stream Survey Data MICHAEL BAKER ENGINEERING, INC. II UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) Figure 3* Cross -Sections with Annual Overlays Table 10 Baseline Stream Data Summary Table I]* Cross-section Morphology Data Appendix E Hydrologic Data Figure 4 Wetland Gauge Graphs Figure 5 Flow Gauge Graphs Figure 6 Observed Rainfall versus Historic Average Table 12 Wetland Restoration Area Well Success Table 13 Flow Gauge Success Table 14 Verification of Bankfull Events * Note: The figures and tables marked above with an asterisk are not included as part of this Year 4 Monitoring Report, but were left listed in the Table of Contents to explain the otherwise out -of -sequence figure/table numbering and appendix designations. For clarity, Michael Baker wishes to preserve the continuity of the labeling for these features between monitoring years to avoid confusion (e.g. to allow Appendix C to always contain vegetation data, and Table 13 to always be the flow gauge success table, etc. in each monitoring report). These figures and tables had been included in past reports and will be included again as part of the Year 5 monitoring report for 2018. MICHAEL BAKER ENGINEERING, INC. III UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) 1.0 EXECUTIVE SUMMARY Michael Baker Engineering (Baker) restored 3,509 linear feet (LF) of perennial stream, 4.0 acres (AC) of riparian wetlands, and enhanced 600 LF of stream along an unnamed tributary (UT) to Mill Swamp in Onslow County, North Carolina (NC), (Appendix A). The total planted acreage was approximately 15.2 acres, and the permanent conservation easement is 19.6 acres. The UT to Mill Swamp Restoration Project (Site) is located in Onslow County, approximately three miles northwest of the Town of Richlands. The Site is located in the NC Division of Water Resources (NCDWR) sub -basin 03-05-02 and the NCDEQ Division of Mitigation Services (DMS) Targeted Local Watershed (TLW) 03030001-010020 of the White Oak River Basin. The project involved the restoration and enhancement of a Coastal Plain Headwater Small Stream Swamp system (NC WAM 2010, Schafale and Weakley 1990) from impairments within the project area due to past agricultural conversion, cattle grazing, and draining of floodplain wetlands by ditching activities. The project goals directly addressed stressors identified in the White Oak River Basin Restoration Priority Plan (RBRP) such as degraded riparian conditions, channel modification, and excess sediment and nutrient inputs. The primary restoration goals, as outlined in the approved mitigation plan, are described below: • Create geomorphically stable conditions along the unnamed tributaries across the Site, • Implement agricultural Best Management Practices (BMPs) to reduce nonpoint source inputs to receiving waters, • Protect and improve water quality by reducing bank erosion, nutrient and sediment inputs, • Restore stream and wetland hydrology by connecting historic flow paths and promoting natural flood processes, and • Restore and protect riparian buffer functions and corridor habitat in perpetuity by establishing a permanent conservation easement. To accomplish these goals, the following objectives were identified: • Restore existing incised, eroding, and channelized streams by providing access to their historic floodplains, • Prevent cattle from accessing the riparian buffer, reducing excessive bank erosion, • Increase aquatic habitat value by providing more bedform diversity, creating natural scour pools and reducing sediment from accelerated bank erosion, • Plant native species riparian buffer vegetation along stream bank and floodplain areas, protected by a permanent conservation easement, to increase stormwater runoff filtering capacity, improve bank stability, and shade the stream to decrease water temperature, • Improve aquatic and terrestrial habitat through improved substrate and in -stream cover, addition of woody debris, and reduction of water temperature, and • Control invasive species vegetation within the project area and if necessary, continue treatments during the monitoring period. The project as -built condition closely mimics that proposed by the design. Differences are outlined below: MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) • The Stream and Wetland Mitigation Plan (Mitigation Plan) specified the planting of riparian live stakes during construction; however, due to construction being completed during the growing season in May 2013 no live stakes were installed. During construction, it was determined that live stakes would be installed during the dormant season. It is noted that as of March 27, 2014, approximately 300 live stakes were installed along the stream banks in the restored single thread channel of the UT 1 c area. • Permanent fencing along Reach UT3 was originally proposed 50 feet from both of the streambanks outside of the conservation easement; however, the landowner decided to use the northern pasture for hay production only, so fencing was installed only on the southern side of the reach to exclude cattle. Special Notes: In consideration of this report, the following timeline should be noted: Completion of construction — 5/31/13 Completion of installation of tree and shrub bare roots — 6/13/13 Year 1 (2013) vegetation monitoring — 10/16/13 Live stake installation - 3/27/14 Year 1 (2013) supplemental vegetation monitoring — 5/18/14 Year 2* (2014) vegetation monitoring — 12/19/14 Year 2 (2015) vegetation monitoring — 11/13/15 Year 3 (2016) vegetation monitoring — November, 2016 Supplemental 3 -foot bare roots installed in the area around Vegetation Plot 3 only — March 20, 2017 Year 4 (2017) vegetation assessment was conducted in October of 2017, but no formal monitoring plot data is required to be collected as part of Year 4 monitoring effort. Supplemental Year 1 (5/18/14) vegetation monitoring was conducted in order to provide additional mortality data. This additional monitoring effort was done since the time that had elapsed between the installation of the tree and shrub bare roots (6/13/13) and Year 1 vegetation monitoring (10/16/13) was only 125 days of the growing season (March 18th through November 16th). Trees and shrubs grew for an additional 61 days of growing season from 3/18/14 through 5/18/14 in early 2014 and were supplementally monitored. A total of 186 days of growing season had elapsed since the trees were planted and the supplemental Year 1 vegetation monitoring was conducted. An additional 181 days within the growing season (5/19/14 through 11/16/14) had elapsed prior to Year 2 (2014) vegetation monitoring, providing the required minimum of 180 days of growing season growth as stated in the approved Mitigation Plan. As such, Baker considered the data collected on 12/19/14 to be Year 2 data and the data collected on 11/13/15 to be Year 3 data. However, the US Army Corps of Engineers has declined to release the credits generated from Year 2 (2014) citing too short of a period between plant installation and monitoring. As such, the 2015 monitoring report was considered Year 2. All references to Year 2 henceforth will indicate monitoring activities conducted during 2015. Data collected during 2014 that was previously considered monitoring Year 2 will be labeled as Year 2*. In accordance with the Mitigation Plan and the DMS guidance document "Monitoring Requirements and Performance Standards for Stream and/or Wetland Mitigation" dated 11/7/2011, no formal vegetation plot monitoring was performed, nor were any stream cross-sectional surveys conducted as part of this Year 4 MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) monitoring effort. A visual assessment of these project features is emphasized this year, with the full vegetation plot and cross-section survey work to resume for the Year 5 monitoring in 2018. During Year 4 monitoring, the planted acreage performance categories were functioning at 100 percent with no bare areas to report, no current low stem density areas, and no areas of poor growth rates. Vegetation plot data monitoring will again be conducted for the MY5 report. Previously during Year 3 monitoring, it was reported that one vegetation plot (Plot 3) did not meet the Year 3 success criteria of 320 stems per acre, having only 243 planted stems per acre (though with an additional 6 natural volunteer stems within the plot). A closer evaluation of this spot confirmed that the observed thin densities were confined to a fairly small area and likely the result of shading from the surrounding mature forest. As such, the area around Veg Plot 3 totaling —0.20 acres was subsequently planted in March of 2017 with additional stems of bald cypress (Taxodium distichum) from bare root, and water tupelo (Nyssa aquatica) planted from tubelings. This area was inspected again in November of 2017 and appeared to be doing well. Invasive species areas of concern were observed and documented during Year 4 monitoring. One area of Chinese privet (Ligustrum sinense) re -sprouts totaling 0.58 acres was discovered along the left floodplain of the lower section of Reach UTIc. This is an area that had previously been treated for privet in November of 2016, and will again be treated in the upcoming monitoring year. During Year 4 monitoring, six of the sixteen groundwater monitoring wells located along Reach UT1c met the wetland success criteria as stated in the Site Mitigation Plan. The gauges that met success criteria (MSAW1, MSAW4, MSAW5, MSAW8, MSAW 19, and MSAW24) demonstrated consecutive hydroperiods of 12 percent or greater, and ranged from 12.8 to 46.1 percent of the growing season. The gauges that did not meet success criteria (See Table 12) demonstrated consecutive hydroperiods of 12 percent or less which ranged from 0.4 percent to 11.5 percent of the growing season. It should be noted that while MSAW7 is not meeting the success criteria, it is located outside of the wetland restoration and hydric soils boundary in the adjacent upland area, while MSAW3 is located on the wetland/upland boundary itself. All of the wells located in the restored wetland area south of UTlc are meeting success criteria, and total 3.26 acres. The restored wetland area north of UT 1 c is 3.36 acres, but only had two wells meet success criteria for an estimated restored area of —0.90 acres (see CCPV in Appendix B). Thus, the total wetland restoration acreage currently equals —4.16 acres (or 4.16 WMUs) in MY4, which is in excess of the wetland mitigation credits stated in the approved Mitigation Plan. Year 4 flow monitoring demonstrated that both flow gauges (MSFL1 and MSFL2) met the stated success criteria of 30 days or more of consecutive flow through reaches UTIs and UTlb. Both gauges demonstrated consecutive days of flow that ranged from 139 days (MSFL1, on UTla) to 164 days (MSFL2, on UTlb). The gauges demonstrated similar patterns relative to rainfall events observed in the vicinity of the Site. The Site was also found to have had at least two above-bankfull events based on the crest gauge readings during Year 4 monitoring. Summary information/data related to the Site 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 available on the North Carolina Division of Mitigation Services (NCDMS) website. All raw data supporting the tables and figures in the appendices is available from NCDMS upon request. MICHAEL BAKER ENGINEERING, INC. 3 UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) 2.0 METHODOLOGY The seven-year monitoring plan for the Site includes criteria to evaluate the success of the stream, Wetland and vegetation components of the project. The methodology and report template used to evaluate these components adheres to the NCDMS monitoring guidance document dated November 7, 2011, which will continue to serve as the template for subsequent monitoring years. The specific locations of monitoring features: vegetation plots, permanent cross-sections, monitoring wells, flow gauges, and the crest gauge, are shown on the CCPV sheets found in Appendix B. The final Year 4 monitoring gauge data were collected in November 2017. All visual site assessment data located in Appendix B were collected in October and November 2017. 2.1 Stream Assessment — Reach UTla & UTlb The UTla and UTlb mitigation approach involved the restoration of historic flow patterns and flooding functions in a multi -thread headwater stream system. Monitoring efforts focus on visual observations to document stability and the use of water level monitoring gauges to document groundwater and flooding functions. 2.1.1 Hydrology Two automated groundwater gauges (pressure transducers) are installed along well transects, with a total of four well transects installed in the UTla and UTlb areas. The automated loggers are programmed to collect data at 6 -hour intervals to record groundwater levels in UTla and UTlb areas. Graphs of the groundwater data collected for these gauges during Year 4 monitoring are located in Appendix E. Additionally, two flow gauges (pressure transducers) were installed to document the occurrence of extended periods of shallow surface ponding, indicative of flow. The gauges attempt to document flooding connectivity between the restored UTla and UTlb reaches for at least 30 consecutive days under normal climatic conditions. Both gauges met this success criteria with consecutive days of flow that ranged from 139 days (MSFL1, on UTla) to 164 days (MSFL2, on UTlb). The gauges demonstrated similar patterns relative to rainfall events observed in the vicinity of the Site. Flow data collected during Year 4 monitoring are located in Appendix E. 2.1.2 Photographic Documentation The headwater stream reaches were photographed longitudinally beginning at the downstream portion of the Site and moving towards the upstream end of the Site. Photographs were taken looking upstream at delineated locations throughout the restored stream valley. The photograph points were established close enough together to provide an overall view of the reach lengths and valley crenulations. The angle of the photo depends on what angle provides the best view and was noted and continued in future photos. Selected UTla and UTlb site photographs taken at established reference stations are found in Appendix B. 2.2 Stream Assessment — Reach UTlc The UTlc mitigation approach involved the restoration of historic flow patterns and flooding functions in a single -thread headwater stream system. Monitoring efforts focus on visual observations, the use of groundwater level monitoring gauges, a crest gauge to document bankfull flooding events and established stream cross- sections to monitor channel stabilitv. MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) Stream survey data is collected to a minimum of Class C Vertical and Class A Horizontal Accuracy using Leica TS06 Total Station and was georeferenced to the NAD83 State Plane Coordinate System, FIPS3200 in US Survey Feet, which was derived from the As -built Survey. This survey system collects point data with an accuracy of less than one tenth of a foot. 2.2.1 Morphologic Parameters and Channel Stability A longitudinal profile was surveyed for the entire length of channel immediately after construction to document as -built baseline monitoring conditions (Year 0) only. The survey was tied to a permanent benchmark and measurements included thalweg, water surface, bankfull, and top of low bank. Each of these measurements was taken at the head of each feature (e.g., riffle, pool) and at the maximum pool depth. Yearly longitudinal profiles will not be conducted during subsequent monitoring years unless channel instability has been documented or remedial actions/repairs are required by the USACE or DMS. As per the Mitigation Plan and DMS monitoring guidance for this project, no cross-section survey data were collected for this Year 4 Monitoring assessment. Consequently, none of the cross-sectional survey graphs (Figure 5) or morphology data (Table 11) are presented in Appendix D as in previous monitoring reports. This data will again be included as part of the Year 5 report. 2.2.2 Hydrology One crest gauge was installed on the floodplain at the bankfull elevation along the left top of bank on UTlc approximately at Station 45+50. In MY4, two above-bankfull events associated with storm events were documented by the crest gauge. The highest recorded reading was measured to be 1.20 feet and was estimated to have occurred on April 25, 2017. Crest gauge reading data are presented in Appendix E and gauge photographs are presented in Appendix B. 2.2.3 Photographic Documentation Representative project photographs for MY4 were taken at the previously established photograph reference stations located along the enhanced and restored stream sections and are presented in Appendix B. 2.2.4 Visual Stream Morphological Stability Assessment The visual stream morphological stability assessment involves the qualitative evaluation of lateral and vertical channel stability, and the integrity and overall performance of in -stream structures throughout the Project reach as a whole. Habitat parameters, and pool depth maintenance, are also measured and scored. During Year 4 monitoring, the entire project reach was walked, noting geomorphic conditions of the stream bed profile (riffle/pool facets); both stream banks, and engineered in -stream structures. All stream reaches appear stable and functioning. All stream beds are vertically stable, the pools are maintaining depth, stream banks are stable and vegetating, and in -stream structures are physically intact and performing as designed. No Stream Problem Areas (SPAS) were documented during Year 4 monitoring. A more detailed summary of the methodology and results for the visual stream stability assessment can be found in Appendix B, which includes supporting data tables. 2.3 Wetland Assessment Following construction, ten automated groundwater monitoring wells were installed in the UTIc wetland restoration areas following USACE protocols (USACE 1997). An additional six monitoring wells were installed in the spring of 2016 in the left floodplain of UT 1 c for a more detailed evaluation in that location. MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) Graphs of the groundwater data collected from each well during the Year 4 monitoring can be found in Appendix E. During the Year 4 monitoring, six of the sixteen groundwater monitoring wells located along Reach UTIc met the wetland success criteria as stated in the Site Mitigation Plan. The gauges that met success criteria (MSAW 1, MSAW4, MSAW5, MSAW8, MSAW 19, and MSAW24) demonstrated consecutive hydroperiods of 12 percent or greater, and ranged from 12.8 to 46.1 percent of the growing season. The gauges that did not meet success criteria (See Table 12) demonstrated consecutive hydroperiods of 12 percent or less which ranged from 0.4 percent to 11.5 percent of the growing season. It should be noted that while MSAW7 is not meeting the success criteria, it is located outside of the wetland restoration and hydric soils boundary in the adjacent upland area, while MSAW3 is located on the wetland/upland boundary itself. All of the wells located in the restored wetland area south of UT 1 c are meeting success criteria, and total 3.26 acres. The restored wetland area north of UTIc is 3.36 acres, but only had two wells meet success criteria for an estimated restored area of —0.90 acres (see CCPV in Appendix B). Thus, the total wetland restoration acreage currently equals —4.16 acres (or 4.16 WMUs) in MY4, which is in excess of the wetland mitigation credits stated in the approved Mitigation Plan. The total observed rainfall at the Albert Ellis airport (KOAJ) weather station located close to the site in Richlands, NC for the previous 12 -month period from December 2016 through November 2017 was 46.2 inches, substantially less that the 30 -year historic annual average of 56.5 inches, for a deficit of just over 10" of rainfall. Of particular note for the project this monitoring year, January, February, and March of 2017 were especially dry, with the latter two months recording rainfalls totals below their historic 30% probable averages. Using the NRCS method (Sprecher and Warne, 2000), drier -than -average antecedent conditions were confirmed as being present on site during the early portion of the growing season in the spring of 2017. The noted lack of rainfall observed in the early part of the year was significant in that it negatively affects the hydrology present at the start of the growing season, typically the wettest time of year on the project when the hydrology success criteria is most likely to be met. A closer investigation into the groundwater well results reveals that many of the wells that did not meet the success criteria only missed by a few days out of the 29 days required to make the 12% threshold. In particular, wells MSAW-6 (1 -day), MSAW-20 (3 -days), and MSAW-21 (3 -days) very each very close. 2.4 Vegetation Assessment In order to determine if success criteria are achieved, vegetation -monitoring quadrants were installed and are monitored annually across the Site in accordance with the CVS-NCEEP Protocol for Recording Vegetation, Version 4.1 (2007). The vegetation monitoring plots are a minimum of two percent of the planted portion of the Site, with six plots established randomly within the planted UTIa, UTIb and UTIc riparian buffer areas per Monitoring Levels 1 and 2. No monitoring quadrants were established within the undisturbed wooded areas of UTIa and UT1b. The sizes of individual quadrants are 100 square meters for woody tree species. As per the Mitigation Plan and DMS monitoring guidance for this project, there was no vegetation plot monitoring conducted for the Year 4 monitoring effort, and thus no vegetation data summary tables are included in Appendix C as in previous monitoring reports. However, as reported in Table 6a (Appendix B), the planted acreage performance categories were functioning at 100 percent with no bare areas to report, no current low stem density areas, and no areas of poor growth rates. Vegetation plot data monitoring will again be conducted for the MY5 report. Previously during Year 3 monitoring, it was reported that one vegetation plot (Plot 3) did not meet the Year 3 success criteria of 320 stems per acre, having only 243 planted stems per acre (though with an additional 6 natural volunteer stems within the plot). A closer evaluation of this spot confirmed that the observed thin MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) densities were confined to a fairly small area and likely the result of shading from the surrounding mature forest. As such, the area around Veg Plot 3 totaling -0.20 acres was subsequently planted in March of 2017 with additional stems of bald cypress (Taxodium distichum) from bare root, and water tupelo (Nyssa aquatica) planted from tubelings. This area was inspected again in November of 2017 and appeared to be doing well. Invasive species areas of concern were observed and documented during Year 4 monitoring. One area of Chinese privet (Ligustrum sinense) re -sprouts totaling 0.58 acres was discovered along the left floodplain of the lower section of Reach UT 1 c. This is an area that had previously been treated for privet in November of 2016, and will again be treated in Monitoring Year 5. At this time, no other areas of concern regarding the existing vegetation was observed along UTla, UTlb or UTlc. Year 4 vegetation assessment information and photographs are provided in Appendix B. 3.0 REFERENCES Carolina Vegetation Survey (CVS) and NC Division of Mitigation Services (NCDMS). 2007. CVS-NCDMS Data Entry Tool v. 2.3.1. University of North Carolina, Raleigh, NC. Lee, M., Peet R., Roberts, S., Wentworth, T. 2007. CVS-NCDMS Protocol for Recording Vegetation, Version 4.1. North Carolina Division of Mitigation Services. 2011. Monitoring Requirements and Performance Standards for Stream and/or Wetland Mitigation. November 7, 2011. Rosgen, D. L. 1994. A Classification of Natural Rivers. Catena 22:169-199. Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina, third approximation. North Carolina Natural Heritage Program. Division of Parks and Recreation, NCDENR. Raleigh, NC. Sprecher, Steven W., and Warne, Andrew G. 2000. "Accessing and using meteorological data to evaluate wetland hydrology," ERDC/EL TR -WRAP -00-01, US Army Engineer Research and Development Center, Vicksburg, MS. United States Army Corps of Engineers. 1997. Corps of Engineers Wetlands Research Program. Technical Note VN-rs-4.1. Environmental Laboratory. U.S. Army Engineer Waterways Experiment Station. Vicksburg, MS. 2005. "Technical Standard for Water -Table Monitoring of Potential Wetland Sites," WRAP Technical Notes Collection (ERDC TN -WRAP -05-2), U.S. Army Engineer Research and Development Center. Vicksburg, MS. 2003. Stream Mitigation Guidelines, April 2003, U.S. Army Corps of Engineers. Wilmington District. MICHAEL BAKER ENGINEERING, INC. UT TO MILL SWAMP RESTORATION PROJECT, DMS PROJECT NUMBER - 95019 MONITORING YEAR 4 OF 7 (2017) Appendix A Project Vicinity Map and Background Tables The subject project site is an environmental restoration site of the Department of Environmental Quality (DEQ) and the Division of Mitigation Services (DMS) and is encompassed by a recorded conservation easement, but is bordered by land under private ownership. Accessing the site may require traversing areas near or along the easement boundary and therefore access by the general public is not permitted. Access by authorized personnel of state and federal agencies or their designees/contractors involved in the development, oversight and stewardship of the restoration site is permitted within the terms and timeframes of their defined roles. Any intended site visitation or activity by any person outside of these previously sanctioned roles and activities requires prior coordination with DMS. � Site Directions To access the site from Raleigh, follow Interstate 40 southeast and take the NC Highway 24 Exit East/NC Highway 903 North, Exit 373 toward Kenansville and Magnolia. From Exit 373, continue on the Kenansville Bypass for 6 miles before turning right onto NC Highway 24 East. After turning right onto NC Highway 24 (Beulaville Highway), continue for 23 miles before turning left onto US Highway 258 (Kinston Highway). Once on US Highway 258, travel for approximately 1.2 miles before turning right onto Warren Taylor Road. Then proceed 0.5 miles and turn left while heading north through a large field. The site is located where the farm road intersects UT to Mill Swamp at a downstream culvert crossing. DMS Project # 95019 rte. Onslow County i ONSL ,c. O v n Project Location -)warren Taylor Rd Note: Site is located within targeted local watershed 03030001010020. Figure 1 Project Vicinity Map UT to Mill Swamp Site DEQ - Division of Mitigation Services INTERNATIONAL 0 0.5 1 2 3 Miles Table 1. Project Components and Mitigation Credits UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Mitigation Credits Stream Riparian Wetland Non-riparian Wetland Buffer Nitrogen Nutrient Offset Phosphorus Nutrient Offset Type R, El R E Totals 3,909 SMU 4.0 WMU 0 Project Components Project Component or Reach ID Stationing/ Existing Footage/ Acreage Location Approach Restoration/ Restoration Equivalent Restoration Footage or Acreage Mitigation Ratio Reach UTIa 10+00 —16+00 600 LF Enhancement Level I 400 SMU 600 LF 1.5:1 Reach UTIb 16+00 —36+93 2,131 LF Headwater Restoration 1,996 SMU 1,996 LF 1:1 Reach UTI c 37+24 —52+37 1,350 LF Single thread Restoration 1,513 SMU 1,513 LF 1:1 Reach UT3 10+00 —23+69 1,060 LF Cattle Exclusion N/A N/A N/A Wetland Area #1 1 See plan sheets 1 0.0 AC I Restoration 4.0 WMU 4.0 AC 1:1 Component Summation Restoration Level Stream (LF) Riparian Wetland (AC) Non-riparian Wetland (AC) Buffer (SF) Upland (AC) Riverine Non-Riverine Restoration 3,509 4.0 Enhancement 600 Enhancement II Creation Preservation High Quality Preservation BMP Elements Element Location Purpose/Function Notes BMP Elements: BR= Bioretention Cell; SF= Sand Filter; SW= Stonnwater Wetland; WDP= Wet Detention Pond; DDP= Dry Detention Pond; FS= Filter Strip; S= Grassed Swale; LS= Level Spreader; NI=Natural Infiltration Area *Note: Credit calculations were originally calculated along the as -built thalweg but have been updated to be calculated along stream centerlines and valley length for Monitoring Year 4 after discussions with NC IRT stemming from the April 3, 2017 Credit Release Meeting. MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 2. Project Activity and Reporting History UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Activity or Report Scheduled Completion Data Collection Complete Actual Completion or Delivery Mitigation Plan Prepared N/A N/A Aug -13 Mitigation Plan Amended N/A N/A Sep -13 Mitigation Plan Approved N/A N/A Nov -13 Final Design — (at least 90% complete) N/A N/A Mar -13 Construction Begins N/A N/A Apr -13 Temporary S&E mix applied to entire project area N/A N/A N/A Permanent seed mix applied to entire project area N/A N/A Jun -13 Planting of live stakes Fall/Winter 2013 N/A Mar -14 Planting of bare root trees N/A N/A Jun -13 End of Construction N/A N/A May -13 Survey of As -built conditions (Year 0 Monitoring -baseline) N/A Aug -13 Aug -13 Year 1 Monitoring Dec -13 Dec -13 Jun -14 'Year 2* Monitoring Dec -14 Dec -14 Jan -15 Year 2 Monitoring Nov -15 Nov -15 Dec -15 Year 3 Monitoring Dec -16 Nov -16 Dec -16 Year 4 Monitoring Dec -17 Nov -17 Jan -18 Year 5 Monitoring Dec -18 Nov -18 N/A Year 6 Monitoring Dec -19 Nov -19 N/A Year 7 Monitoring Dec -20 Nov -20 N/A ' As stated in the Special Notes section of the Excutive Summary: the US Army Corps of Engineers declined to release the credits generated from Year 2 (2014) citing too short of a period between plant installation and monitoring following construction. As such, this report (2017) will be considered Year 4. All references to Year 4 included in this report will indicate monitoring activities conducted during 2017. Data collected during 2014 that was previously considered monitoring Year 2 is labeled as Year 2* MICHAEL BAKER ENGINEERING, INC YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 3. Project Contacts UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Designer Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 Cary, NC 27518 Contact: Jake Byers, Tel. (828) 412-6101 Construction Contractor River Works, Inc. 6105 Chapel Hill Road Raleigh, NC 27607 Contact: Bill Wright, Tel. 919-582-3575 Planting Contractor River Works, Inc. 6105 Chapel Hill Road Raleigh, NC 27607 Contact: Bill Wright, Tel. 919-582-3575 Seeding Contractor River Works, Inc. 6105 Chapel Hill Road Raleigh, NC 27607 Contact: Bill Wright, Tel. 919-582-3575 Seed Mix Sources Green Resources, Tel. 336-855-6363 Nursery Stock Suppliers Mellow Marsh Farm, 919-742-1200 ArborGen, 843-528-3204 Superior Tree, 850-971-5159 Monitoring Performers Michael Baker Engineering, Inc. 8000 Regency Parkway, Suite 600 Cary, NC 27518 Contact: Stream Monitoring Point of Contact Scott King, Tel. 919-481-5731 Vegetation Monitoring Point of Contact Scott King, Tel. 919-481-5731 Wetland Monitoring Point of Contact Scott King, Tel. 919-481-5731 MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 4. Project Attributes UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Project Information Project Name UT to Mill Swamp Restoration Project County Onslow Project Area (acres) 19.6 Project Coordinates (latitude and longitude) 34.9377 N, -77.5897 W Watershed Summary Information Physiographic Province Inner Coastal Plain River Basin White Oak USGS Hydrologic Unit 8-digit and 14-digit 03030001 / 03030001010020 DWQ Sub-basin 03-05-02 Project Drainage Area AC 421 (d/s main stem UT 1) Project Drainage Area Percentage of Im ervious Area <1% CGIA Land Use Classification 2.01.03.99, Other Hay, Rotation, or Pasture; 413 NCEEP Land Use Classification for UT to Mill Swamp Watershed (White Oak River Basin Restoration Priorities, 2010) Forest (52%) Agriculture (44%) 1 Impervious Cover (0.6%) Stream Reach Summary Information Parameters Reach UT1 Reach UT3 Length of Reach (LF) 4,091 1,060 Valley Classification Ros en X X Drainage Area AC 421 23 NCDWQ Stream Identification Score 40.5 21 NCDWQ Water Quality Classification C; NSW C; NSW Morphological Description (Rosgen stream type) (Channelized Headwater System) Intermittent Ditch (N/A) Evolutionary Trend Gc4F Intermittent Ditch (N/A) Underlying Mapped Soils Mk, St, Ly, FoA Mk, St Drainage Class Poorly drained, somewhat poorly drained Poorly drained, somewhat poorly drained Soil Hydric Status Hydric Hydric Average Channel Slope ft/ft 0.0041 0.0058 FEMA Classification N/A N/A Native Vegetation Community Coastal Plain Small Stream Swamp Coastal Plain Small Stream Swamp Percent Composition of Exotic/Invasive Vegetation —10% <5% Wetland Summary Information Parameters Wetland 1 (Non-Jurisdictional W1) Size of Wetland (AC) 6.62 (3.36 north of UT 1 c, 3.26 south of UT 1 c) Wetland T e Riparian Riverine Mapped Soil Series Mk (Muckalee), St (Stallings), Ly (Lynchburg) Drainage Class Poorly drained, somewhat poorly drained Soil Hydric Status Hydric Source of Hydrology Groundwater Hydrologic Im airment Partially (disconnected floodplain from ditches and channel incision) Native Vegetation Community Coastal Plain Small Stream Swamp, Successional Percent Composition of Exotic/Invasive Vegetation 19.7% (Before fall 2016 treatment event) Regulatory Considerations Regulation Applicable Resolved Supporting Documentation Waters of the United States — Section 404 Yes Yes See Mitigation Plan Waters of the United States — Section 401 Yes Yes See Mitigation Plan Endangered Species Act No N/A See Mitigation Plan Historic Preservation Act No N/A See Mitigation Plan Coastal Zone Management Act (CZMA)/ Coastal Area Management Act (LAMA) No N/A See Mitigation Plan FEMA Floodplain Compliance No N/A See Mitigation Plan Essential Fisheries Habitat No N/A See Mitigation Plan Source: White Oak River Basin Restoration Priorities, 2010(htlp://www.hq://portal.ncdenr.ora/c/document dfD 17873496b&grououpid=60329) librgy/get file?uuid=lcOb7e5a-9617-4a44-a5f8- MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Appendix B Visual Assessment Data ■ I UT 3 UT 1a Conservation Easement Crest Gauge ® Flow Gauges (Both Met Success Criteria in MY4) z�, Photo Points Monitoring Well Year 4 Success O Groundwater Wells Meeting Criteria • Groundwater Wells NOT Meeting Criteria O Headwater Research Wells - - - - Cattle Exclusion Fencing Cross Sections (Not Required for MY4) Stream Crossings In -Stream Structures As -Built Streams by Mitigation Type (All Stable) Enhancement I No Mitigation Credit Restoration: Multi -Thread Channel — Restoration: Single -Thread Channel - Vegetation Plots (Not Required for MY4) ® Restored Wetland Area Supplemental Planting (-0.2 acres in March 2017) Privet Resprout Location (0.58 ac) INTERNATIONAL 0 250 500 N Feet DMS Project # 95019 Figure 2 Index Map Current Condition Plan View Monitoring Year 4 UT to Mill Swamp Site Sta. 10+00.00 UT 1a PP.18 17 Veg Plot 1 Conservation Easement 0 Crest Gauge ® Flow Gauges (Both Met Success Criteria in MY4) A. Photo Points Monitoring Well Year 4 Success Q Groundwater Wells Meeting Criteria 0 Groundwater Wells NOT Meeting Criteria Q Headwater Research Wells (non-credit areas) - - - - Cattle Exclusion Fencing Cross Sections (Not Required for MY4) Stream Crossings In -Stream Structures As -Built Streams by Mitigation Type (All Stable) Enhancement I Restoration: Multi -Thread Channel (No Top of Bank) Sta. 16+00.00 Restoration: Single -Thread Channel No Mitigation Credit - Vegetation Plots (Not Required for MY4) Supplemental Planting (-0.2 acres in March 2017) PP14 Monitoring Date: Dec 2017 Aerial Photo Date: 2016 PP12 MSAW14 • PP11 • PP13 R=. Veg Plot 2 Sta. 10+00.00 UT 1b INTERNATIONAL 0 100 200 N Feet DMS Project # 95019 UT 1 b: Sta. 26+07.40 UT3 (end): Sta. 23+69.36 Veg Plot 3 Figure 2A Current Condition Plan View Monitoring Year 4 UT to Mill Swamp Site Stream Crossing UT 3 17 Veg Plot 1 Conservation Easement 0 Crest Gauge ® Flow Gauges (Both Met Success Criteria in MY4) A. Photo Points Monitoring Well Year 4 Success Q Groundwater Wells Meeting Criteria 0 Groundwater Wells NOT Meeting Criteria Q Headwater Research Wells (non-credit areas) - - - - Cattle Exclusion Fencing Cross Sections (Not Required for MY4) Stream Crossings In -Stream Structures As -Built Streams by Mitigation Type (All Stable) Enhancement I Restoration: Multi -Thread Channel (No Top of Bank) Sta. 16+00.00 Restoration: Single -Thread Channel No Mitigation Credit - Vegetation Plots (Not Required for MY4) Supplemental Planting (-0.2 acres in March 2017) PP14 Monitoring Date: Dec 2017 Aerial Photo Date: 2016 PP12 MSAW14 • PP11 • PP13 R=. Veg Plot 2 Sta. 10+00.00 UT 1b INTERNATIONAL 0 100 200 N Feet DMS Project # 95019 UT 1 b: Sta. 26+07.40 UT3 (end): Sta. 23+69.36 Veg Plot 3 Figure 2A Current Condition Plan View Monitoring Year 4 UT to Mill Swamp Site Veg Plot 3 Supplemental Planted Area (-0.2 acres) UT 1b Wetland Area Meeting Criteria (0.24 ac) Sta. 36+93.00 ;;. Veg Plot 4 Stream Crossing All Wetlands South of Stream (3.26 ac) UT 1c Monitoring Date: Dec 2017 Aerial Photo Date: 2016 INTERNATIONAL XS- MSAW4 VegfPlot 5 XS -6! maravv/ MSAW19 Wetland Area Meeting Criteria (0.66 ac) MSAW1 ' k 0 100 200 N Feet DMS Project # 95019 Veg Plot 6 Sta. 52+37.58 Figure 2B Current Condition Plan View Monitoring Year 4 UT to Mill Swamp Site Conservation Easement Crest Gauge ® Flow Gauges (Both Met Success Criteria in MY4) z�\ Photo Points Monitoring Well Year 4 Success 0 Groundwater Wells Meeting Criteria 0 Groundwater Wells NOT Meeting Criteria 0 Headwater Research Wells Cross Sections (Not Required for MY4) As -Built Streams by Mitigation Type (All Stable) Enhancement I Restoration: Multi -Thread Channel (No Top of Bank) Restoration: Single -Thread Channel All Wetlands North No Mitigation Credit of Stream (3.36 ac) - Vegetation Plots (Not Required for MY4) (in upland) ® Wetland Success Areas on Left Bank (0.90 ac) MSAW7 Privet Resprouts ® Restored Wetland Area (0.58 ac) Supplemental Planting (March 2017) MSAW22 Privet Resprout Location (0.58 ac) XS -6! maravv/ MSAW19 Wetland Area Meeting Criteria (0.66 ac) MSAW1 ' k 0 100 200 N Feet DMS Project # 95019 Veg Plot 6 Sta. 52+37.58 Figure 2B Current Condition Plan View Monitoring Year 4 UT to Mill Swamp Site Table 5a. Visual Stream Morphology Stability Assessment UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Reach ID: UT1c Assessed Length (LF): 1,513 Major Channel Category Channel Sub- Metric Category Number Stable, Performing as Intended Total Number per As -built Number of Unstable Segments Amount of Unstable Footage % Stable, Performing as Intended Number with Stabilizing Woody Ve . Footage with Stabilizing Woody Ve Adjusted % for Stabilizing Woody Veg. 1. Aggradation 0 0 100% 1.Ver[ical Stability 2 Degradation 0 0% 100% 2. Riffle Condition 1. Texture Substrate 3. Meander Pool 1. Depth 3 22 3 22 100% 100% Condition 2. Length 22 22 100% 1. Bed 1. Thalweg centering at upstream of meander bend (Run) 4. Thalweg Position 19 19 100% 2. Thalweg centering at downstream of meander bend (Glide) 19 19 100% AL 141111porr- 1W 1. Scoured/Eroding Bank lacking vegetative cover resulting simply from poor growth and/or scour and erosion 0 0 100% 0 0 100% 2. Bank 2. Undercut Banks undercut/overhanging undercut/overhangingto the extent that mass wasting appears likely 0 0 100% 0 0 100% 3. Mass Wasting Banks slumping, caving or collapse 0 0 too % 0 0 100% 3. Engineering Structures 1. Overall Integrity Structures physically intact with no dislodged boulders or los 8 fotals 8 0 0 t00% 100% 0 0 100% 2. Grade Control Grade control structures exhibiting maintenance of grade across the sill 8 8 100% 2a. Piping Structures lacking any substantial flow underneath sill or arms 8 8 100% 3. Bank Position Bank erosion within the structures extent of influence does not exceed 15% 8 8 100% 4. Habitat Pool forming structures maintaining - Max Pool Depth 8 8 100% MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 5b. Stream Problem Areas (SPAS) UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Feature Issue Station Number Suspected Cause Photo Number N/A N/A N/A N/A MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 6a. Vegetation Conditions Assessment UT to Mill Swamp Restoration Project: EEP Project ID No. 95019 Total Planted Acreage: 15.2 Mapping CCPV Number of Combined Vegetation Category Defintions % of Planted Acreage Threshold (acres) Depiction Polygons Acreage 1. Bare Areas Very limited cover both woody and herbaceous material. 0.1 NA 0 0.00 0.0% 2. Low Stem Density Areas Woody stem densities clearly below target levels based on MY3, 4 or 5 0.1 NA 0 0.00 0.0% stem count criteria. Total 0 0.00 0.0% 3. Areas of Poor Growth Rates or Areas with woody stems or a size class that are obviously small given the 0.25 NA 0 0.00 0.0% Vigor monitoring year. Cumulative Total 0 0.00 0.0% Easement Acreage: 19.6 Mapping CCPV Number of Combined Vegetation Category Defintions % of Easement Acreage Threshold Depiction Polygons Acreage 5. Invasive Areas of Concern Areas of points (if too small to render as polygons at map scale) 1000 ft2 Yes 1 0.58 3.0% 6. Easement Encroachment Areas Areas of points (if too small to render as polygons at map scale) none NA 0 0.00 0.0% MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) Table 6b. Vegetation Problem Areas (VPAs) UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Vegetation Problem Area (as Feature Issue Suspected Cause Photo Number shown on CCPV) Invasive/Exotic Populations #1 See CCPV Res routs of Li ustrum sinense Photos 1-3 MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) UT to Mill Swamp: Stream Photographs Photo Point 1 — Upstream at Culvert Photo Point 3 — Log Jam Photo Point 5 — Log Weir � s i Photo Point 2 — Log Jam Photo Point 4 — Log Weir/Log Jam Photo Point 6 — Log Weir UT to Mill Swamp: Stream Photographs Photo Point 7 — Log Weir Photo Point 9 — UTIb at Flow Gauge #2 Photo Point 8 — UTIb Upstream Photo Point 10 — UT3 above confluence Photo Point 11 — UT3 Log Weir Photo Point 12 — UT3 Log Weir UT to Mill Swamp: Stream Photographs Photo Point 13 — UT3 Log Weir Photo Point 15 — UTIb view upstream Photo Point 17 — Log Weir Photo Point 14 — UTIb view upstream Photo Point 16 — Log Weir Photo Point 18 — Log Weir UT to Mill Swamp: Crest Gauge and Flow Cameras Crest gauge reading, 1.18 ft from 1/2/17 storm i an ►J P", . fit i�Ti Crest gauge reading, 1.20 ft from 4/25/17 storm Flow Camera #1 — 1/2/17 (storm event) Flow Camera #1 — 3/18/17 (storm event) low Camera #1 — 4/25/17 (storm event low Camera #2 — 2/16/17 (storm event UT to Mill Swamp: Crest Gauge and Flow Cameras Flow Camera #2 — 3/19/17 (storm event) ,E ':1.%MSFL2 71T21 0 04-26-201710:01:01 Flow Camera #2 — 4/26/17 (storm event) UT to Mill Swamp: Vegetation Problem Areas (VPAs) VPA (Ligustrum sinense resprouts) 11/21/2017 VPA (Ligustrum sinense resprouts) 11/21/2017 VPA (Ligustrum sinense resprouts) 11/21/2017 Ligustrum sinense (previously treated in Nov 2016) Appendix C Vegetation Plot Data* *No vegetation plot monitoring was required for Year Appendix D Stream Survey Data* *No cross-section stream survey monitoring was required for Year 4 Appendix E Hydrologic Data Table 12. Wetland Restoration Area Well Success UT to Mill Swamp Restoration Project: DMS Project ID No. 95019 Well ID Percentage of Consecutive Days <12 inches from Ground Surface' Most Consecutive Days Meeting Criteria' Percentage of Cumulative Days <12 inches from Ground Surface' Cumulative Days Meeting Criteria' Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) UTlc Cross -Sectional Well Arrays (Installed July 2013) MSAWI 4.4 29.1 20.8 24.6 14.8 10.8 70.8 50.5 59.8 36.0 53.5 56.8 52.1 66.5 37.4 130.0 138.0 126.5 161.5 91.0 MSAW2 0.7 3.3 6.5 4.0 2.5 1.8 8.0 15.8 9.8 6.0 3.5 20.2 26.3 19.8 22.2 8.5 49.0 64.0 48.0 54.0 MSAW3 (on boundary) 0.0 0.3 0.6 0.6 0.4 0.0 0.8 1.5 1.5 1.0 0.0 1.0 2.1 0.8 0.4 0.0 2.5 5.0 2.0 1.0 MSAW4 10.3 27.8 36.4 31.2 46.1 25.0 67.5 88.5 75.8 112.0 97.0 74.2 61.0 83.4 80.2 235.7 180.3 148.3 202.8 195.0 MSAW5 3.3 21.2 19.7 31.1 25.1 8.0 51.5 47.8 75.5 61.0 40.5 51.9 51.6 58.3 52.7 98.4 126.0 125.5 141.8 128.0 MSAW6 1.1 3.8 1 7.0 4.2 11.5 2.8 9.3 17.0 10.3 28.0 9.5 1 23.3 28.3 19.7 25.1 23.1 56.5 68.8 1 47.8 61.0 MSAW7 (in upland) 0.2 3.7 2.7 2.1 1.6 0.5 9.0 6.5 5.0 4.0 0.3 10.9 14.6 7.1 6.6 0.7 26.5 35.5 17.3 16.0 MSAW8 14.1 47.3 37.7 31.1 36.2 34.3 115.0 91.5 75.5 88.0 96.8 73.9 66.3 83.0 79.4 235.2 179.6 161.0 201.8 193.0 MSAW9 2.5 4.5 8.6 5.7 9.5 6.0 11.0 21.0 13.8 23.0 44.5 33.0 28.6 41.7 39.9 108.1 80.3 69.5 101.3 97.0 MSAW10 0.0 0.6 5.3 2.1 4.9 0.0 1.5 13.0 5.0 12.0 0.0 1.1 13.1 16.8 30.5 0.0 2.8 31.8 40.8 74.0 Supplemental UTlc Monitoring Wells (Installed February/March 2016) **MSAW19 8.7 12.8 21.3 31.0 43.8 42.4 106.5 103.0 **MSAW20 3.7 6.6 9.0 16.0 10.1 20.2 24.5 49.0 **MSAW21 3.7 10.7 9.0 26.0 12.7 17.7 30.8 43.0 **MSAW22 2.8 5.8 6.8 14.0 14.0 23.5 34.0 57.0 **MSAW23 3.1 9.9 7.5 24.0 23.7 32.9 57.5 80.0 **MSAW24 31.2 1 26.3 1 1 75.8 1 64.0 1 72.1 1 83.1 1 175.3 202.0 Headwater Research Cross -Sectional Well Arrays on UTla and UTlb (Installed July 2013) MSAWll 4.7 21.2 32.3 40.1 36.0 11.5 51.5 78.5 97.5 87.5 38.5 72.4 76.7 84.9 68.3 93.6 176.0 186.5 206.3 166.0 MSAW12 0.7 15.4 10.1 7.6 14.5 1.8 37.5 24.5 18.5 35.3 7.0 19.1 24.9 27.4 15.1 17.0 46.5 60.5 66.5 36.8 MSAW13 6.5 46.5 40.0 40.0 36.0 15.8 113.0 97.3 97.3 87.5 81.5 80.0 82.2 84.8 66.0 198.0 194.5 199.8 206.0 160.5 MSAW14 0.6 39.1 18.3 17.9 25.6 1.5 95.0 44.5 43.5 62.3 4.0 31.0 46.7 61.6 32.7 9.7 75.3 113.5 149.8 79.5 MSAW15 0.8 0.9 2.4 1.6 1.1 2.0 2.3 5.8 4.0 2.8 4.0 3.9 5.1 6.7 2.0 9.7 9.5 12.5 16.3 4.8 MSAW16 2.4 1 2.8 1 2.3 1 2.1 1 1.2 1 5.8 1 6.8 1 5.5 1 5.0 1 3.0 1 14.5 1 13.0 1 11.5 1 7.1 2.2 1 35.2 1 31.5 1 28.0 17.3 1 5.3 MSAW17 0.0 0.1 0.7 0.3 0.2 0.0 0.3 1.8 0.8 0.5 0.0 0.1 1.3 0.5 0.2 0.0 0.3 3.3 1.3 0.5 MSAW18 3.8 10.2 7.4 2.2 1.2 9.3 24.8 18.0 5.3 3.0 18.5 15.3 20.8 10.7 3.6 45.0 37.3 50.5 26.0 8.8 Notes: 'Indicates the percentage of the single greatest consecutive or cumulative number of days within the monitored growing season with a water 12 inches or less from the soil surface. 2Indicates the single greatest consecutive number of days within the monitored growing season with a water table 12 inches or less from the soil surface. 'Indicates the total cumulative number of days within the monitored growing season with a water table 12 inches or less from the soil surface. Growing season for Onslow County is from March 18 to November 16 and is 243 days long. 12% of the growing season is 29 days. HIGHLIGHTED indicates wells that did not to meet the success criteria for the most consecutive number of days within the monitored growing season with a water 12 inches or less from the soil surface. These wells will be observed closely throughout monitoring Year 5. Following Year 4 wetland monitoring, six of sixteen wells exhibited hyrdroperiods greater than 12% during the 2017 growing season. **To gather additional well data in the UTlc restoration area, In -Situ groundwater monitoring dataloggers AW 19 -AW23 were installed on 2/26/2016, AW24 was installed on 3/10/2016. The installation of the additional dataloggers was completed during the 2016 spring wet season when groundwater levels were normally closer to the ground surface. MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 - I r v 11P Season 1.0 f (3/18 - 11/16) 2.0 JT 3.0 � 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW1) 10 Ground 5 Surface 0 I I I I -12 inches F -5 a -10 MSAW1 16 -15 I I 3 -20 r 41114 IV —Begin 0 Growing w -25 Season t YR4 MOST CONSECUTIVE DAYS I — —End -30 CRITERIA MET - 36.0 (14.8%) I Growing O 3/18/2017 -35 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Season GROWING SEASON (3/18 - 11/16) I UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 �\�I'�711�II�IIIII�iI� I1111�11111�\�II _� . SI1��111 2.0 l � 3.0 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW2) 20 15 Ground Surface 10 _ 5 0 d 3 -5 -10 -15 o -20 s L�II�II111����11111�1� a -25 LAW <1\IYsImEMEME -30 SWIM -35 --,k YR4 MOST CONSECUTIVE DAYS -40 GROWING SEASON CRITERIA MET - 6 0 (2 5%) -45 -50 , 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date I I I � �\�I'�711�II�IIIII�iI� I1111�11111�\�II _� . SI1��111 -.. l � UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 2.0 = 3.0 � 4.0 UT to Mill Swamp Wetland Restoration Well (MSAW3 - located on wetland/upland boundary) 10 5 a c -5 L -10 to -15 3 -20 -25 s CL -30 35 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date GROWING SEASON Ground Surface -12 inches (3/18 - 11/16) MSAW3 I — Begin YR4 MOST CONSECUTIVE DAYS CRITERIA MET - 1.0 (0.4%) I 4/25/2017 Growing Season — — End Growing Season IV1 I A I -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 GROWING SEASON I 3.0 (3/18 - 11/16) I I w 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW4) 10 Ground 5 Surface 0 I I -12 inches -5 I 1A IV a`) -10 MSAW4 -15 I o -20 —Begin C7 Growing o -25 Season Y YR4 MOST CONSECUTIVE DAYS CL -30 I CRITERIA MET- 112 (46.1%) I — —End I d I 3/8/2017 - 7/7/2017 Growing D Season -35 111 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date GROWING SEASON I (3/18 - 11/16) I I UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 3.0 GROWING SEASON I w 4.0 I I 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW5) 10 Ground 5 face Sur711 0 I I I I -12 inches c -5 a`) Y -10 MSAW5 Vill 111 -15 o —Begin C7 -20 Growing Season o Y -25 CL -30 YR4 MOST CONSECUTIVE DAYS I — —End d D CRITERIA MET - 61.0 (25.1%) I Growing Season -35 3/8/2017 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date GROWING SEASON I (3/18 - 11/16) I I UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 2.0 3.0 � 4.0 5.0 10 5 0 -5 `m -10 Y R -15 'o -20 t7 o -25 Y CL -30 d -35 -40 -45 -50 UT to Mill Swamp Wetland Restoration Well (MSAW6) I I I I V Is A AN V1 I I YR4 MOST CONSECUTIVE DAYS CRITERIA MET- 28.0 (11.5%) 3/18/2017 - 4/14/2017 GROWING SEASON (3/18 - 11/16) I I 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface 12 inches MSAW6 — Begin Growing Season End Growing Season UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 2.0 = 3.0 4.0 5.0 10 5 0 -5 m -10 .r 16 -15 'o -20 L o -25 a -30 d O -35 -40 -45 -50 UT to Mill Swamp Wetland Restoration Well (MSAW7 - located in upland area) YR4 MOST CONSECUTIVE DAYS CRITERIA MET- 4.0 (1.6%) 4/24/2017 - 4/27/2017 I I Ak I a RA not I I I I I I GROWING SEASON Wk— 19 (3/18 - 11/16) I I 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface -12 inches MSAW7 Begin Growing Season End Growina I I Ground Surface UT to Mill Swamp Rain -12 inches 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 MSAW8 5 1.0 I I Growing Season I I GROWING SEASON (3/18 - 11/16) 2.0 End Growing Season I I 3.0 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW8) 10 5 0 16 _ -5 d r -10 -15 o -20 o -25 t Q. -30 d -35 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date I I Ground Surface -12 inches I I I I MSAW8 —Begin I I Growing Season I I GROWING SEASON (3/18 - 11/16) YR4 MOST CONSECUTIVE DAYS I CRITERIA MET - 88.0 (36.2%) I 3/18/2017 - 6/13/2017 End Growing Season I I UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 S1.0 2.0 3.0 w 4.0 5.0 20 15 10 5 = 0 -5 -10 c o -15 -20 O s -25 o -30 -35 -40 -45 -50 UT to Mill Swamp Wetland Restoration Well (MSAW9) 11_ I WN, ■aIIUNIIIIIMIIIII=NM�IIIIIn L�1 IIIIL ulIsiPisam �� IL11l► �LU ME MOST • DAYS GROWING SEASON I l 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface 12 inches MSAW9 — Begin Growing Season End Growing Season UT to Mill Swamp Rain �■ ■��■II I �1■ ������I�I�I�IV�I�IIi I■11111�1�1� ���'I,�I■■11llu,lllll■I1I.II■,III.11_III 1 � �'1 ■1�1■I� 1I'll■III,�■ 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 JT 3.0 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW10) 10 Ground Surface 5 -12 inches -5 �I11I �MSAW10 -10 ��1.II1■I.I �I��I■ 1j,11111IN 1�.II��IIIIII lilll—I� -15 a 3 -20 — — Begin Growing � 25 Season O ORM End -30 Growing t Season M -35% -40 YR4 MOST CONSECUTIVE DAYS GROWING SEASM CRITERIA MET - 12.0 (4.9%) -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date �■ ■��■II I �1■ ������I�I�I�IV�I�IIi I■11111�1�1� ���'I,�I■■11llu,lllll■I1I.II■,III.11_III 1 � �'1 ■1�1■I� 1I'll■III,�■ II�� Illlll 11■� �I II��I!llvl�� 11 , _III UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 JT 3.0 4.0 5.0 UT to Mill Swamp (Well cross-sections 11, 12) 10 Ground 5 Surface 0 --12 inches -5 IL c MSAW11 -10 w' -15 MSAW12 R 3 -20 M 0 -25 0 -30 0 s 0 -35 a0i D -40 -45 -50 -55 -60 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 JT 3.0 4.0 5.0 UT to Mill Swamp (Well cross-sections 13,14) 15 Ground 10 Surface 5 --12 inches O -L [,A, = 574" W MSAW13 i 3 d -10 11 MSAW14 Is -15 WIR ILc -20 ° 0 -25 s S -30 0 -35 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 JT 3.0 4.0 5.0 UT to Mill Swamp (Well cross-sections 15,16) 10 Ground Surface 5 0 --12 inches -5 MSAW 15 C 10 i MSAW16 d -15 3 C -20 3 -25 w -30 t CL 0 -35 -40 -45 -50 -55 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 _ 5 1.0 JT 2.0 3.0 4.0 5.0 UT to Mill Swamp (Well cross-sections 17,18) 10 Ground 5 Surface 0 --12 inches MSAW17 `) -10 %It It .r R "k 11 IRI 1111 _MSA 18 -15 ITc C -20 'L^ V c w -25 t cL -30 d -35 -40 -45 PW -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 —Begin 0.0 5 1.0 Growing Season 2.0 End YR4 MOST CONSECUTIVE DAYS CRITERIA MET- 31.0 (12.8%) 3/18/2017 - 4/17/2017 GROWING SEASON (3/18 - 11/16) Growing Season I c 3.0 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW19) 20 I Ground Surface 15 I 10 I I -12 inches = 5 I I I o I MSAW19 3 -5 - 10 0 a -15 o s -20 .. -25 Vill -30 -35 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date I —Begin I Growing Season End YR4 MOST CONSECUTIVE DAYS CRITERIA MET- 31.0 (12.8%) 3/18/2017 - 4/17/2017 GROWING SEASON (3/18 - 11/16) Growing Season I UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 2.0 3.0 � 4.0 5.0 10 5 0 S -5 L -10 to c -15 3 -20 ° -25 0 w CL -30 G -35 -40 -45 -50 UT to Mill Swamp Wetland Restoration Well (MSAW20) YR4 MOST CONSECUTIVE DAYS - CRITERIA MET- 16.0 (6.6%) 3/28/2017 - 4/12/2017 I GROWING SEASON (3/18 - 11/16) 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface 12 inches MSAW20 Begin Growing Season End Growing Season UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 E 1.0 2.0 c 3.0 M 4.0 ALI UT to Mill Swamp Wetland Restoration Well (MSAW21) 10 5 A F -5 L a -10 a -15 -20 ° -25 0 t -30 D 99 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface I I -12 inches MSAW21 I I — Begin Growing Season 1 — — End YR4 MOST CONSECUTIVE DAYS Growing CRITERIA MET - 26.0 (10.7%) Season 3/18/2017 - 4/12/2017 I GROWING SEASON 1 (3/18 - 11/16) -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 S1.0 2.0 3.0 4.0 5.0 10 5 0 c -5 L a? -10 R -15 C 0 -20 t7 C -25 s -30 -35 -40 -45 -50 1/1/2017 UT to Mill Swamp Wetland Restoration Well (MSAW22) 2/15/2017 4/1/2017 5/16/2017 6/30/2017 Date 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Ground Surface 12 inches MSAW22 Begin Growing Season End Growing Season UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 S1.0 2.0 3.0 ix 4.0 5.0 10 5 0 c -5 a -10 m -15 ° -20 ° -25 s -30 D -35 -40 -45 -50 UT to Mill Swamp Wetland Restoration Well (MSAW23) 1, 1 , T I I I 1 IF RNO �'L�.'w►�I►�'1 ii �� 1111 I � I � � I� I JII II ����iaw��ll'i�1■I■1�\■I�_ ■11111'llll■�_ ■I � MIMI11111111111iYilE11,11Pill� i '4 MOST CONSECUTIVEDAYS1 CRITERIA I . 1 I 1 GROWING• ' 1 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date Ground Surface 12 inches MSAW23 — Begin Growing Season End Growing Season UT to Mill Swamp Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 5 1.0 2.0 GROWING SEASON (3/18 - 11/16) 3.0 4.0 5.0 UT to Mill Swamp Wetland Restoration Well (MSAW24) 25 20 Ground Surface 15 10 -12 inches = 5 m 0 I MSAW24 3 -5 I W 1W c 0 L -10 —Begin (D Growing -15 O I I Season s -20 —End -25 I I Growing D -30 YR4 MOST CONSECUTIVE DAYS Season -35 I I CRITERIA MET - 64.0 (26.3%) 3/18/2017 -40 -45 -50 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date GROWING SEASON (3/18 - 11/16) Table 13. Flow Gauge Success UT to Mill Swam Restoration Project: DMS Project ID No. 95019 Flow Gauge ID Most Consecutive Days Meeting Criteria' Cumulative Days Meeting Criteria Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) Year 5 (2018) Year 6 (2019) Year 7 (2020) Year 1 (2013) Year 2* (2014) Year 2 (2015) Year 3 (2016) Year 4 (2017) Year 5 (2018) Year 6 (2019) Year 7 (2020) Flow Gauges (Installed July 17, 2015) MSFL1 8.9 30.8 51.0 59.0 139.0 - - - 34.3 242.3 137.3 187.0 213.0 - - - MSFL2 35.2 131.4 151.6 105.0 164.0 - - - 79.1 326.6 186.1 231.0 243.0 - - - Notes: 'Indicates the single greatest number of consecutive days within the monitoring year where flow was measured. 2Indicates the total number of days within the monitoring year where flow was measured. Success Criteria per UT to Mill Swamp Mitigation Plan: A surface water flow event will have been considered to have occurred when flow duration is recorded for aminimum of 30 consecutive days during the monitoring year. Two surface water flow events must be documented within a five-year monitoring period; otherwise, monitoring will continue for seven years or until two flow events have been documented in separate years. Surface water flow is estimated to have occurred when the pressure transducer reading is equal to or above 0.1 feet in depth. MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019) * Surface water flow is estimated to have occurred when the pressure transducer reading is equal to or above 0.1 feet in depth. UT to Mill Swamp Daily Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 2.0 - 3.0 4.0 a5.0 .E 6.0 7.0 8.0 UT to Mill Swamp (Flow Gauge 1 - MSFL1) 1.5 UT1 B - Upstream 1.4 1.3 YR4 MOST CONSECUTIVE DAYS -Ground Surface 1.2 CRITERIA MET - 139 -MSFL1 (1/1/2017 - 5/19/2017) 1.1 :r 1 t a 0.9 p 0.8 ar 0.7 0.6 0.5 0.4 0.3 c'n 0.2 0.1 0 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date * Surface water flow is estimated to have occurred when the pressure transducer reading is equal to or above 0.1 feet in depth. * Surface water flow is estimated to have occurred when the pressure transducer reading is equal to or above 0.1 feet in depth. UT to Mill Swamp Daily Rain 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 0.0 1.0 S 5 2.0 - 3.0 �a 4.0 5.0 6.0 7.0 8.0 UT to Mill Swamp (Flow Gauge 2 - MSFL2) 1.5 UTI B - Downstream 1.4 1.3 -Ground Surface 1.2 -MSFL2 1.1 1.0 s 0.9 Q, 0 0.8 L 0.7 0.6WV 0.5 0.4 3 CO 0.3 YR4 MOST CONSECUTIVE DAYS 0.2 CRITERIA MET = 164 0.1 (1/1/2017-6/13/2017) 0.0 1/1/2017 2/15/2017 4/1/2017 5/16/2017 6/30/2017 8/14/2017 9/28/2017 11/12/2017 12/27/2017 Date * Surface water flow is estimated to have occurred when the pressure transducer reading is equal to or above 0.1 feet in depth. Figure 6. Observed Rainfall versus Historic Average UT to Mill Swamp Observed Rainfall versus Historic Average: MY4 (2017) 10.0 U 8.0 U i7 eat JL 6.0 0 4.0 U U a" 2.0 0.0 —*--Historic Average (56.5 in) t Historic 30% probable —Historic 70% probable Onslow County Observed 2017 (46.2 in) Note: Data from nearest NC-CRONOS station KOAJ Table 14. Verification of Bankfull Events UT to Mill Swamp Restoration Project: DMS Project No. 95019 Date of Data Collection Estimated Occurrence of Bankfull Event Method of Data Collection Gauge Reading (feet) Year 1 (2013) 10/16/2013 10/11/2013 Crest Gauge 0.17 12/24/2013 12/15/2013 Crest Gauge 0.19 Year 2* (2014) 3/27/2014 3/7/2014 Crest Gauge 0.32 10/14/2014 8/4/2014 Crest Gauge 0.56 12/19/2014 11/26/2014 Crest Gauge 0.27 Year 2 (2015) 1/24/2015 1/24/2015 Crest Gauge 0.59 4/27/2015 2/26/2015 Crest Gauge 1.07 6/23/2015 5/11/2015 Crest Gauge 1.61 11/12/2015 10/3/2015 Crest Gauge 1.54 Year 3 (2016) 3/10/2016 2/5/2016 Crest Gau e 1.44 11/22/2016 10/8/2016 Hurricane Matthew Crest Gauge 2.32 Year 4 2017 3/20/2017 1/2/2017 Crest Gauge 1.18 6/2/2017 4/25/2017 Crest Gauge 1.20 MICHAEL BAKER ENGINEERING, INC. YEAR 4 MONITORING REPORT UT TO MILL SWAMP RESTORATION PROJECT (DMS PROJECT NO. 95019)