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HomeMy WebLinkAbout20160404 Ver 1_Year 3 Monitoring Report_2020_20201231ID#* 20160883 Version* 1 Select Reviewer:* Erin Davis Initial Review Completed Date 01/04/2021 Mitigation Project Submittal-12/31/2020 Is this a Prospectus, Technical Proposal or a New Site?* O Yes a No Type of Mitigation Project:* rJ Stream r Wetlands [Buffer ❑ Nutrient Offset (Select all that apply) Project Contact Information Contact Name:* Lindsay Crocker Project Information .................................................................................................................................................................. ID#:* 20160883 Existing 1W Project Type: F DMS r Mitigation Bank Project Name: Edwards Johnson County: Johnston Document Information Email Address:* lindsay.crocker@ncdenr.gov Version: * 1 Existing Version Mitigation Document Type:* Mitigation Monitoring Report File Upload: EdwardsJohnson_97080_MY3_2020.pdf 15.53MB Rease upload only one R7F of the complete file that needs to be subrritted... Signature Print Name:* Lindsay Crocker Signature:* Monitoring Report —Year 3 FINAL VERSION Edwards -Johnson Mitigation Project Calendar Year of Data Collection: 2020 NCDEQ DIMS Project Identification # 97080 NCDEQ DIMS Contract # 6825 Neuse River Basin (Cataloging Unit 03020201) USACE Action ID Number: SAW-2016-00883 NCDEQ DWR Project # 2016-0404 Johnston County, NC Contracted Under RFP # 16-006477 Data Collection Period: September — October 2020 Submission Date: December 11, 2020 i•`,.�� r.:. v u Prepared for: N'r-0 Environmental Quality North Carolina Department of Environmental Quality Division of Mitigation Services 1652 Mail Service Center Raleigh, NC 27699-1652 Prepared by: WATER & LAND SOLUTIONS 7721 SIX rORKS ROAD, SUITE 130, RALEIGH, NC 27615 (919)614-5111 1 waterlandsolutions.com WATER & LAND SOLUTIONS 7721 SIX FORKS ROAD, SUITE 130, RALEIGH, NC 27615 (919) 614 - 5111 I waterlandsolutions.com December 11, 2020 INC Department of Environmental Quality Division of Mitigation Services Attn: Lindsay Crocker 217 West Jones Street, Suite 3000-A Raleigh, INC 27603 RE: WLS Responses to NCDEQ DMS Review Comments for Task 9 Draft Monitoring Report Year 3 for the Edwards -Johnson Mitigation Project, NCDEQ DMS Full -Delivery Project ID #97080, Contract #006825, Neuse River Basin, Cataloging Unit 03020201, Johnston County, INC Dear Ms. Crocker: Water & Land Solutions, LLC (WLS) is pleased to present the Final Monitoring Report Year 3 for the Edwards -Johnson Mitigation Project to the North Carolina Department of Environmental Quality (NCDEQ) Division of Mitigation Services (DIMS). The Final Monitoring Report Year 3 were developed by addressing NCDEQ DMS's review comments. Under this cover, we are providing the Final Monitoring Report Year 3, and the required digital data for each (the .pdf copies of the entire updated reports and the updated digital data) via electronic delivery. We are providing our written responses to NCDEQ DMS's review comments on the Draft Monitoring Report Year 3 below. Each of the DIMS review comments is copied below in bold text, followed by the appropriate response from WLS in regular text: Report: DMS Comment: The project summary states that the site is "mostly meeting" for MY3 vegetation, but the report goes on to state that plots 3 and 4 are failing. Remove that statement in the summary as it is not accurate or consider other comments below in revision. WLS Response: The word "mostly" was removed from the project summary statement. WLS updated vegetation Plots 3 and 4 to include stems planted in MY3 and the plots are now meeting MY3 success criteria. 2. DMS Comment: Page 6 and 7. Last sentence of paragraph 5.1 is incorrect, please review and revise. According to the table, confirm that there were 2 bankfull events in MY2 and 3 events in MY3. WLS Response: The mitigation plan states, "Two separate bankfull events must be documented within the seven- year monitoring period. These two bankfull events must occur in separate years. Otherwise, the stream monitoring will continue until two bankfull events have been documented in separate years. In addition to the two bankfull flow events, two "geomorphically significant" flow events (Qgs=0.66Q2) must also be documented during the monitoring period." As stated in the in the mitigation plan, the stream has met the bankfull requirements. The sentence in 5.1 has been updated to better reflect the requirements of the mitigation plan. Three bankfull events occurred in Year 2 and two bankfull events occurred in Year 3. 3. DMS Comment: The CCPV indicates areas of concern from MY2 were 0.43 (green shaded). Confirm that this is the acreage that was replanted with the —245 plants (560 stems/acre)? Did WLS also replant the encroachment area along upper RI (farm scallop)? If not, please add something to the text about the condition of that area. WLS Response: The area on the CCPV that was replanted was —0.43 acres (green) and was planted with —245 plants. The area of previous encroachment was planted in early 2019 and is in good vegetated condition (yellow). 4. DMS Comment: It is suggested in the text that VP 3 and 4 do not meet success because MY2 planted species were not included in the vegetative table and/or counted toward success. If this is true, update monitoring data and report to report vegetation for MY3 (including replants). The IRT guidance on not counting replants toward success is specific to MY5 and MY7 and does not apply in this case. WLS Response: WLS misinterpreted the guidance in relation to counting newly planted stems. VP 3 and 4 are meeting success criteria by including the newly planted stems. Table 6 and section 5.5 have been updated accordingly. 5. DMS Comment: Because the lower energy sections of this stream (R3 upper and lower) occur where the stream flattens out, IRT has previously expressed concern regarding maintaining single thread and moving sediment through the system. DMS and WLS should watch these sections closely, as the 20% increase in bankfull area for pool at XS-6 may indicate sediment storage is out of balance there. Please provide any additional thoughts on how those areas are developing and maintaining flow and sediment balance in the report. WLS Response: XS-6 is located in a pool on R3 upper. It is expected for pools to fluctuate as sediment is transported through the system, especially in a year of well above average rainfall. In comparison to the overlay graph, XS-6 is very similar to the as -built surveyed condition. Due to the low number of points taken during the MYO as -built survey, WLS opted to use MY1 to calculate bankfull areas which contributed to the 20% change. Based on MY0-MY1 survey, XS-6 pool accumulated sediment, which was flushed out during MY3 heavy flows. During the fall monitoring data collection and visual survey, R3 upper is a stable and functioning as a single -thread stream system. R3 lower is maintaining stream flow throughout the year in a multi -threaded stream system, very similar to that found at the Pen Dell (DMS Project #97079) R5 preservation section located just north of the Project. WLS will continue to carefully monitor this channel segment. 6. DMS Comment: Update rain report for October and November if possible. WLS Response: WLS updated Figure 5 with the October and November rain total. DMS Comment: Confirm that the stream photos taken 3/2020 are still relevant for all streams in MY3. WLS Response: All stream photos taken in March 2020 are still relevant for all locations in MY3. Photos were taken during the spring visual survey visit prior to the growing season. Digital Deliverables: 1. DMS Comment: Please provide the "stream problem area" and "encroachment area planted" shapefiles for the current monitoring year that were included in Figure 1. WLS Response: The shapefiles for "stream problem area" and "encroachment area planted" are included in the a -data. 2. DMS Comment: Include the visual assessment photos as JPEGS rather than a single PDF. WLS Response: JPEGS of all photos are now included in the e-data. Please contact me if you have any questions or comments. Sincerely, Water & Land Solutions, LLC Catherine Manner Water & Land Solutions, LLC 7721 Six Forks Road, Suite 130 Raleigh, NC 27615 Office Phone: (919) 614-5111 Mobile Phone: (571) 643-3165 Email: catherine@waterlandsolutions.com Table of Contents 1 Project Summary................................................................................................................................... 1 2 Project Background............................................................................................................................... 1 2.1 Project Location, Setting, and Existing Conditions........................................................................ 1 2.2 Mitigation Project Goals and Objectives....................................................................................... 1 2.3 Project History, Contacts, and Timeframe....................................................................................2 3 Project Mitigation Components............................................................................................................ 2 3.1 Stream Mitigation Types and Approaches.................................................................................... 2 3.1.1 R1 Preservation..................................................................................................................... 3 3.1.2 R2 Restoration....................................................................................................................... 3 3.1.3 R3 (Upper Reach) Restoration.............................................................................................. 3 3.1.4 R3 (Lower Reach) Preservation.............................................................................................4 3.1.5 R4 Restoration....................................................................................................................... 4 4 Performance Standards........................................................................................................................4 4.1 Streams......................................................................................................................................... 5 4.1.1 Stream Hydrology................................................................................................................. 5 4.1.2 Stream Profiles, Vertical Stability, and Floodplain Access....................................................5 4.1.3 Stream Horizontal Stability...................................................................................................5 4.1.4 Streambed Material Condition and Stability........................................................................6 4.1.5 Jurisdictional Stream Flow....................................................................................................6 4.2 Vegetation.....................................................................................................................................6 5 Monitoring Year 3 Assessment and Results.......................................................................................... 6 5.1 Stream Hydrology......................................................................................................................... 6 5.2 Stream Horizontal & Vertical Stability.......................................................................................... 7 5.3 Streambed Material Condition and Stability................................................................................7 5.4 Jurisdictional Stream Flow Documentation..................................................................................7 5.5 Vegetation.....................................................................................................................................8 5.6 Wetlands.......................................................................................................................................8 6 References............................................................................................................................................ 9 LIST OF APPENDICES Appendix A Background Tables and Figures Table 1 Project Mitigation Components Table 2 Project Activity and Reporting History Table 3 Project Contacts Table 4 Project Information and Attributes Appendix B Visual Assessment Data Figure 1 Current Condition Plan View (CCPV) Table 5 Visual Stream Morphology Stability Assessment Table 5a Vegetation Condition Assessment Photos Stream Station Photographs Photos Vegetation Plot Photographs Appendix C Vegetation Plot Data Table 6 Planted and Total Stem Counts Table 6b Re -Plant List Appendix D Stream Measurement and Geomorphology Data Figure 2 MY3 Cross -Sections Figure 3 MY3 Pebble Count Table 7a Baseline Stream Data Summary Table 7b Cross-section Morphology Data Table 7c Stream Reach Morphology Data Appendix E Hydrologic Data Figure 4 Hydrologic Data Figure 5 Rainfall Data Table 8 Verification of Flow Events Water & Land Solutions 0 1 Project Summary Water and Land Solutions, LLC (WLS) completed the construction and planting of the Edwards -Johnson Mitigation Project (Project) full -delivery project for the North Carolina Department of Environmental Quality (NCDEQ), Division of Mitigation Services (DMS) in March 2018. The Project is located in Johnston County, North Carolina between the Community of Archer Lodge and the Town of Wendell at 35.7251°, 78.35636°. The Project site is located in the NCDEQ Sub -basin 03-04-06, in the Lower Buffalo Creek Priority Sub -watershed 030202011504. The Project involved the restoration, preservation, and permanent protection of four stream reaches (R1, R2, R3, and R4) totaling 3,729 linear feet of streams and their riparian buffers. WLS staff visited the site several times throughout Monitoring Year 3 (MY3) for monitoring activities. Data collection occurred between September and October 2020 (Table 2). This report presents the data for MY3. The Project meets the MY3 success criteria for stream hydrology and stream horizontal and vertical stability. Two low -stem - density areas totaling approximately 0.43 acres were replanted in February 2020. Based on these results, the Project is meeting MY3 success criteria and is expected to meet the Monitoring Year 4 (MY4) success criteria in 2021. Vegetation problem areas are present but minimal. 2 Project Background 2.1 Project Location, Setting, and Existing Conditions The Project site is located in the Lower Buffalo Creek Priority Sub -watershed 030202011504 study area of the Neuse 01 Regional Watershed Plan, in the Wake -Johnston Collaborative Local Watershed Plan, and in Targeted Local Watershed 03020201180050. The catchment area is 223 acres and has an impervious cover less than one percent. The dominant surrounding land uses are agriculture and mixed forest. Prior to construction, some of the riparian buffers were less than 50 feet wide. 2.2 Mitigation Project Goals and Objectives WLS established project mitigation goals and objectives based on the resource condition and functional capacity of the watershed to improve and protect diverse aquatic resources comparable to stable headwater stream systems within the Piedmont Physiographic Province. The proposed mitigation types and design approaches described in the final approved mitigation plan considered the general restoration and resource protection goals and strategies outlined in the 2010 Neuse River Basin Restoration Priority Plan (RBRP). The functional goals and objectives were further defined in the 2013 Wake -Johnston Collaborative Local Watershed Plan and 2015 Neuse 01 Regional Watershed Plan and include: • Reducing sediment and nutrient inputs to the upper Buffalo Creek Watershed, • Restoring, preserving, and protecting wetlands, streams, riparian buffers, and aquatic habitat, • Implementing agricultural BMPs and stream restoration in rural catchments together as "project clusters". The following site -specific goals were developed to address the primary concerns outlined in the LWP and RWP and include: Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 1 Water & Land Solutions 0 • Restore stream and floodplain interaction and geomorphically stable conditions by reconnecting historic flow paths and promoting more natural flood processes, • Improve and protect water quality by reducing streambank erosion, nutrient and sediment inputs, • Restore and protect riparian buffer functions and habitat connectivity in perpetuity by recording a permanent conservation easement, • Implement agricultural BMPs to reduce nonpoint source inputs to receiving waters. To accomplish these site -specific goals, the following function -based objectives will be measured and included with the performance standards to document overall project success as described in the table below: Improve Base Flow Remove man-made pond dam and restore a more natural flow regime and aquatic passage. Reconnect Floodplain / Increase Lower BHRs from >2.0 to 1.0-1.2 and maintain Floodprone Area Widths ERs at 2.2 or greater. Improve Bedform Diversity Increase riffle/pool percentage to 70/30 and pool -to -pool spacing ratio 4-7X bankfull width. Reduce BEHI/NBS streambank erosion rates Increase Lateral Stability comparable to downstream reference condition and stable cross-section values. Plant or protect native species vegetation a Enhance Riparian Buffer Vegetation minimum 50' wide from the top of the streambanks with a composition/density comparable to reference condition. Install water quality treatment basins along Improve Water Quality the riparian corridor and reduce sediment and nutrient levels. Improve Macroinvertebrate Incorporate native woody debris and bedform Community and Aquatic Species diversity into channel and change DWR Health bioclassification rating from `Poor' to a minimum `Fair' by Monitoring Year 7. 2.3 Project History, Contacts, and Timeframe The chronology of the project history and activity is presented in Table 2. Relevant project contact information is presented in Table 3. Relevant project background information is presented in Table 4. 3 Project Mitigation Components Refer to Figure 1 and Table 1 for the project components/asset information. A recorded conservation easement consisting of 10.96 acres protects and preserves all stream reaches, existing wetland areas, and riparian buffers in perpetuity. 3.1 Stream Mitigation Types and Approaches Stream restoration practices involved raising the existing streambed and reconnecting the stream to the relic floodplain. Some portions of the existing degraded channels that were abandoned within the restoration areas were filled to decrease surface and subsurface drainage and raise the local water table. Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 2 Water & Land Solutions 4 The project also included restoring, enhancing, and protecting riparian buffers and riparian wetlands within the conservation easement. The vegetative components of this project included stream bank, floodplain, and transitional upland zones planting. The Site was planted with native species riparian buffer vegetation (Appendix C) and now protected through a permanent conservation easement. Table 1 (Appendix A) and Figure 1 (Appendix B) provide a summary of the project components. 3.1.1 R1 Preservation Preservation was implemented along this reach since the existing stream and wetland system is mostly stable with a mature riparian buffer due to minimal historic impacts. The preservation area is being protected in perpetuity through a permanent conservation easement. This approach will extend the wildlife corridor from the Buffalo Creek floodplain boundary throughout a majority of the riparian valley, while providing a hydrologic connection and critical habitat linkage within the catchment area. 3.1.2 R2 Restoration Work along R2 involved a Priority Level I Restoration approach by raising the bed elevation and reconnecting the stream with its abandoned floodplain. This approach will promote more frequent over bank flooding in areas with hydric soils, thereby creating favorable conditions for wetland re- establishment. The reach was restored using appropriate riffle -pool morphology with a conservative meander planform geometry that accommodates the valley slope and width. This approach allowed restoration of a stable channel form with appropriate bedform diversity, as well as, improved biological functions through increased aquatic and terrestrial habitats. Proposed in -stream structures included constructed wood riffles for grade control and habitat, log j-hook vanes, and log weirs/jams for encouraging step -pool formation energy dissipation, bank stability, and bedform diversity. Riparian buffers greater than 50 feet were enhanced and will be protected along the entire length of R2. Mature trees and significant native vegetation were protected and incorporated into the design. Bioengineering techniques such as vegetated geolifts and live stakes were also used to protect streambanks and promote woody vegetation growth along the streambanks. The existing unstable channel was filled to an elevation sufficient to connect the new bankfull channel to its active floodplain using suitable fill material excavated from the newly restored channels and remnant spoil piles. Additionally, water quality treatment basins were installed to reduce direct sediment and nutrient inputs. 3.1.3 R3 (Upper Reach) Restoration A Priority Level I Restoration approach was implemented for the upstream portion to improve stream functions and water quality. Prior to restoration activities, the reach exhibited both lateral and vertical instability, as shown by active headcuts and moderate bank erosion. A new single -thread meandering channel was constructed offline in this area before reconnecting with multiple relic channel features and the existing channel alignment farther downstream. In -stream structures, including log riffles, log weirs and log vanes were used to dissipate flow energy, protect streambanks, and eliminate potential for future incision. Shallow floodplain depressions and vernal pools were created or preserved in the floodplain to provide habitat diversity, nutrient cycling, and improved treatment of overland flows. Restored streambanks were graded to stable side slopes and the floodplain was reconnected to further promote stability and hydrological function. Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 3 Water & Land Solutions 4 3.1.4 R3 (Lower Reach) Preservation Preservation was implemented along this reach since the existing stream and wetland system is mostly stable with a mature riparian buffer due to minimal historic impacts. The preservation is being protected in perpetuity through a permanent conservation easement. This approach will extend the wildlife corridor from the Buffalo Creek floodplain boundary throughout a majority of the riparian valley, while providing a hydrologic connection and critical habitat linkage within the catchment area. 3.1.5 R4 Restoration The restoration of R4 involved raising the existing bed elevation gradually to reconnect the stream with its active floodplain. Prior to restoration activities, the existing channel began experiencing backwater conditions and sediment aggradation from a man-made pond. The failing dam and remnant spoil piles were removed, and the pond was drained to reconnect the new stream channel with its geomorphic floodplain. Channel and floodplain excavation in this reach segment included the removal of shallow legacy sediments (approx. 12" depth) to accommodate a new bankfull channel and in -stream structures, as well as a more natural step -pool morphology using grade control structures in the steeper transitional areas. Shallow floodplain depressions were created to provide habitat diversity, nutrient cycling, and improved treatment of overland flows. Riparian buffers greater than 50 feet were restored and protected along all R4. 4 Performance Standards The applied success criteria for the Project will follow necessary performance standards and monitoring protocols presented in final approved mitigation plan. Annual monitoring and semi-annual site visits will be conducted to assess the condition of the project throughout the monitoring period. Monitoring activities will be conducted for a period of seven years with the final duration dependent upon performance trends toward achieving project goals and objectives. The following Proposed Monitoring Plan Summary from the approved final mitigation plan summarizes the measurement methods and performance standards. Specific success criteria components and evaluation methods follow. Improve Base Flow Remove man-made Create a more natural Duration and pond, pressure Maintain seasonal flow fora and higher functioning Overbank Flows (i.e. transducer, regional minimum of 30 consecutive headwater flow regime channel forming curve, regression days during normal annual and provide aquatic discharge) equations, catchment rainfall. passage. assessment Provide temporary Reconnect Maintain average BHRs at 1.2 water storage and Floodplain / Increase Bank Height Ratio, and increase ERs at 2.2 or reduce erosive forces Floodprone Area Entrenchment Ratio, greater and document (shear stress) in Widths crest gauge bankfull/geomorphically channel during larger significant flow events. flow events. Pool to Pool spacing, Increase riffle/pool Provide a more natural Improve Bedform riffle -pool sequence, percentage and pool -to -pool stream morphology, Diversity pool max depth ratio, spacing ratios compared to energy dissipation and Longitudinal Profile reference reach conditions. aquatic habitat/refugia. Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 4 Water & Land Solutions 4 BEHI / NBS, Cross- Decrease streambank erosion Reduce sedimentation, (Level 3) Increase Vertical and sections and rates comparable to excessive aggradation, Lateral Stability Longitudinal Profile reference condition cross- and embeddedness to Surveys, visual section, pattern and vertical allow for interstitial assessment profile values. flow habitat. Within planted portions of CVS Level I & II the site, a minimum of 320 Increase woody and Protocol Tree Veg stems per acre must be herbaceous vegetation Establish Riparian Plots (Strata present at year three; a will provide channel Buffer Vegetation Composition and minimum of 260 stems per stability and reduce Density), visual acre must be present at year streambank erosion, five; and a minimum of 210 runoff rates and exotic assessment stems per acre must be species vegetation. present at year seven. Reduction of excess nutrients and organic Improve Water N/A N/A pollutants will increase (Level 4) Quality the hyporheic exchange and dissolved oxygen (DO) levels. Increase leaf litter and Improve Benthic DWR Small Stream/ organic matter critical Biology Macroinvertebrate Qual v4 sampling, IBI N/A to provide in -stream (Level 5) Communities and (MY3MYSMY7) , , cover/shade, wood Aquatic Health recruitment, and carbon sourcing. Note: Level 4 and 5 project parameters and monitoring activities will not be tied to performance standards nor required to demonstrate success for credit release. 4.1 Streams 4.1.1 Stream Hydrology Two separate bankfull events must be documented within the seven-year monitoring period. These two bankfull events must occur in separate years. Otherwise, the stream monitoring will continue until two bankfull events have been documented in separate years. In addition to the two bankfull flow events, two geomorphically significant flow events (01�5=0.66Q2) must also be documented during the monitoring period. There are no temporal requirements regarding the distribution of the geomorphically significant flows. 4.1.2 Stream Profiles, Vertical Stability, and Floodplain Access Stream profiles, as a measure of vertical stability will be evaluated by looking at Bank Height Ratios (BHR). The BHR shall not exceed 1.2 along the restored project reaches. This standard only applies to the restored project reaches where BHRs were corrected through design and construction. In addition, observed bedforms should be consistent with those observed for channels of the design stream type(s). 4.1.3 Stream Horizontal Stability Cross -sections will be used to evaluate horizontal stream stability. There should be little change expected in as -built restoration cross -sections. If measurable changes do occur, they should be evaluated to determine if the changes represent a movement toward a more unstable condition (e.g., downcutting, erosion) or a movement towards increased stability (e.g., settling, vegetation establishment, deposition Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 5 Water & Land Solutions 4 along the streambanks, decrease in width/depth ratio). Cross -sections shall be classified using the Rosgen Stream Classification method and all monitored cross -sections should fall within the quantitative parameters defined for channels of the design stream type. 4.1.4 Streambed Material Condition and Stability After construction, there should be minimal change in the particle size distribution of the streambed materials, over time, given the current watershed conditions and future sediment supply regime. Since the streams are predominantly sand -bed systems with minimal fine/coarse gravel, some coarsening is anticipated after restoration activities, however significant changes in particle size distribution are not expected. Streambed material condition is supplementary and is not part of success criteria. 4.1.5 Jurisdictional Stream Flow The restored stream systems must be classified as at least intermittent, and therefore must exhibit base flow with at least 30 days of continuous flow during a year with normal rainfall conditions as described in the approved mitigation plan. 4.2 Vegetation Vegetative restoration success for the project during the intermediate monitoring years will be based on the survival of at least 320, three -year -old planted trees per acre at the end of Year 3 of the monitoring period and at least 260, five -year -old, planted trees per acre at the end of Year 5 of the monitoring period. The final vegetative restoration success criteria will be achieving a density of not less than 210, seven- year -old planted stems per acre in Year 7 of monitoring. Planted vegetation (for projects in coastal plain and piedmont counties) must average seven feet in height at Year 5 of monitoring and 10 feet in height at Year 7 of monitoring. Volunteer stems will only be counted toward success if they are surviving for at least 2 years, are at least 12" tall, and are species from the approved planting list. For all of the monitoring years (Year 1 through Year 7), the number of Red maple (Acer rubrum) stems cannot exceed 20 percent of the total stems in any of the vegetation monitoring plots. 5 Monitoring Year 3 Assessment and Results Annual monitoring was conducted during MY3 in accordance with the monitoring plan as described in the approved mitigation plan to document the site conditions. All monitoring device locations are depicted on the CCPV (Figure 1). MY3 results are provided in the appendices. The Project meets the MY3 success criteria for stream hydrology, stream horizontal and vertical stability, and vegetation. Stream Hydrology 5.1 Stream Hydrology Monitoring to document the occurrence of the two required bankfull events (overbank flows) and the two required geomorphically significant flow events (Qgs=0.66Q2) within the monitoring period, along with floodplain access by flood flows, is being conducted using a crest gauge, installed on December 12, 2018, on the floodplain of and across the dimension of the restored channel at the left top of bank of Reach R2, immediately upstream of the confluence of Reach R2 and R4 (Figure 1), to record the watermark associated with the highest flood stage between monitoring site visits. Photographs are also being used to document the occurrence of debris lines and sediment deposition on the floodplain during monitoring site visits. Two bankfull events occurred during MY3 (see table below). These events were documented using the described photography (Table 8). The documented occurrence of these two flow events in MY3 Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 6 Water & Land Solutions 4 and the three events during MY2 satisfies the requirement of the occurrence of four bankfull events (overbank flows) in at least two separate years. 5.2 Stream Horizontal & Vertical Stability Visual assessment and monitoring of 8 permanent cross sections were utilized for assessment of MY3 horizontal and vertical stream stability. The visual assessments for each stream reach concluded that the MY3 stream channel pattern and longitudinal profiles, instream structure locations, still closely match the profile design parameters and MYO/baseline conditions. The MY3 plan form geometry or pattern still fall within acceptable ranges of the design parameters for all restored reaches. One cross section, XS-6 (pool) located at station 29+56, exhibited a 20% change in bank height ratio when compared to MY1 data (BHR for pools is not used to determine stability). This is due to the movement of sediment throughout the stream system and is common in pools. It is not an indication of instability in the reach, based on visual assessment. One area of erosion found during the visual assessments of MY2 totaling approximately 15 linear feet and located in a pool at a meander bend of R4 at approximately STA 18+00 has stabilized and no remedial action is needed. This area will continue to be monitored in MY4. An additional area on the right bank of R2 located at the transition of R1 to R2 at station 16+13 has approximately 10 linear feet of undercut bank and was noted during the spring 2020 visual assessment. This area is where the transition from preservation to restoration occurred. This area stabilized throughout MY3 and will continue to be monitored in MY4. Photographs of the two areas can be found in Appendix B. Overall, only minor (non - systemic) channel adjustments in riffle slopes, pool depths and pattern were observed and therefore did not present a stability concern or indicate a need for immediate remedial action. 5.3 Streambed Material Condition and Stability A representative sediment sample was collected to assess streambed material condition and stability. The dominant substrate for the project was verified as very coarse sand. The post -construction riffle substrate sampling indicated no significant change in streambed material condition or stability during MY3. 5.4 Jurisdictional Stream Flow Documentation Jurisdictional stream flow documentation and monitoring of restored intermittent reaches is achieved using a flow gauge (continuous -read pressure transducers) within the thalweg of the channel towards the middle portion of the Reach R4 (Figure 1). Additionally, to determine if rainfall amounts are normal for the given year, precipitation data was obtained from CLAY Central Crops Research Station in Johnston County, approximately nine miles southwest of the site. The flow gauge documented that the stream exhibited surface flow for a minimum of 30 consecutive days throughout some portion of the year during a year with normal rainfall conditions (Figure 4). Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 7 Water & Land Solutions 0 5.5 Vegetation Vegetation monitoring for MY3 was conducted utilizing the four vegetation monitoring plots, with monitoring conducted in accordance with the CVS-EEP Level I & II Monitoring Protocol (CVS, 2008) and DMS Stream and Wetland Monitoring Guidelines (DMS, 2017). See Figure 1 in Appendix B for the vegetation monitoring plot locations. Summary data and photographs of each plot can be found in Appendix B. Areas of low stem density were identified during MY2 in the vicinity of Plots 3 and 4 and were replanted in February 2020 (Figure 1) with approximately 245 stems with species from the approved planting list from the mitigation plan. The planting list and quantities are included in Appendix C. Plots 3 and 4 now meet required success criteria with 324 and 445 stems/acre, respectively. The MY3 vegetation monitoring was also conducted utilizing visual assessment throughout the easement. One area of concern located on the left bank of R2 totaling approximately 0.35 acres was noted. Replanting of the area using containerized trees to increase survivability will occur prior to March 15t" to meet success criteria for MY4 with species from the approved planting list from the mitigation plan. The results of the visual assessment did not indicate any additional significant negative changes to the existing vegetation community. 5.6 Wetlands Wetland mitigation credits are not contracted or proposed for this project. One groundwater monitoring well was installed during the baseline monitoring along Reach R3. Two additional groundwater monitoring wells are installed along Reach R3 near station 33 + 75 and 37 + 00 (Figure 4). These wells were installed to document groundwater levels within the restoration area for reference and comparison to the preservation areas, at the request of the NCIRT (DWR). No performance standards for wetland hydrology success was proposed in the Mitigation Plan and therefore wetland mitigation monitoring is not included for this project. The well data are presented in the appendices. Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 8 Water & Land Solutions 4 6 References Doll, B.A., Grabow, G.L., Hall, K.A., Halley, J., Harman, W.A., Jennings, G.D., and Wise, D.E. 2003. Stream Restoration A Natural Channel Design Handbook. Harrelson, Cheryl C; Rawlins, C.L.; Potyondy, John P. 1994. Stream Channel Reference Sites: An Illustrated Guide to Field Technique. Gen. Tech. Rep. RM-245. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 61 p. KCI Associates of NC, DMS. 2010. Using Pressure Transducers for Stream Restoration Design and Monitoring. Lee, M., Peet R., Roberts, S., Wentworth, T. CVS-NCEEP Protocol for Recording Vegetation, Version 4.1, 2007. North Carolina Department of Environmental Quality, Division of Mitigation Services, Wildlands Engineering, Inc. 2015. Neuse 01 Regional Watershed Plan Phase II. Raleigh, NC. North Carolina Department of Environmental Quality, Division of Mitigation Services, 2017. Annual Monitoring Report Format, Data and Content Requirement. Raleigh, NC. Rosgen, D. L., 1994. A Classification of Natural Rivers. Catena 22: 169-199. Rosgen, D.L., 1996. Applied River Morphology. Wildland Hydrology Books, Pagosa Springs, CO. Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina, third approximation. North Carolina Natural Heritage Program. NCDENR Division of Parks and Recreation. Raleigh, NC. United States Army Corps of Engineers. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. Environmental Laboratory. US Army Engineer Waterways Experiment Station. Vicksburg, MS. 1997. Corps of Engineers Wetlands Research Program. Technical Note VN-RS-4.1. Environmental Laboratory. U.S. Army Engineer Waterways Experiment Station. Vicksburg, MS. 2003. Stream Mitigation Guidelines, April 2003, U.S. Army Corps of Engineers. Wilmington District. Water and Land Solutions, LLC (2017). Edwards -Johnson Mitigation Project Final Mitigation Plan. NCDMS, Raleigh, NC. Edwards -Johnson Mitigation Project FINAL Monitoring Report Year 3 Page 9 Appendices FJ Edwards -Johnson Mitigation Project Appendix A — Background Tables and Figures FJ Edwards -Johnson Mitigation Project Table 1. Mitigation Assets and Components Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Existing Mitigation As -Built Project Wetland Footage Plan Footage or ApproacTRa Component Position and or Footage or Acreage Restoration Prioritytion Mitigation (reach ID, etc.)' HydroType2 Acreage StationingAcreage Level LevelX:1 Credits* Notes/Comments R1 611 10+00 -16+11 611 611 P 61 Invasive Control, Permanent Conservation Easement. Full Channel Restoration, Invasive Control, Permanent Conservation R2 1007 16+11-27+94 1183 1180 R PI 1 1183 Easement. Full Channel Restoration, Invasive Control, Permanent Conservation R3 (upper 629 27+94-36+09 815 853 R PI 1 815 Easement. R3 (lower) 240 36+09 - 37+39 130 149 P 10 13 Invasive Control, Permanent Conservation Easement. Full Channel Restoration, Pond Removal, Invasive Control, Permanent R4 815 10+00 - 19+36 951 936 R PI/PII 1 951 Conservation Easement. Length and Area Summations by Mitigation Category Restoration Level Stream (linear feet) Riparian Wetland (acres) Non -riparian Wetland (acres) Riverine Non-Riverine Restoration 2949 Enhancement Enhancement I Enhancement II Creation Preservation 741 High Quality Pres Overall Assets Summary Overall Asset Category Credits* Stream 3,023 RP Wetland NR Wetland * Mitigation Credits are from the final approved mitigation plan, as verified by the as -built survey Table 2. Project Activity and Reporting History Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Elapsed Time Since grading complete: 2 yrs 6 months Elapsed Time Since planting complete: 2 yrs 6 months Number of reporting Years : 3 Activity or Deliverable Data Collection Complete Completion or Delivery Project Contract xecu ion Final i iga ion Plan Submittal Section enera(Regional and Nationwide)Permit erica ion Begin Construction 3/23/2018 Mitigation Site Earthwork Completed = 5/5/2018 Mitigation Site Planting Completed N/A 5/5/2018 Installation of Monitoring Devices Completed N/A 5/14/2018 Installation of Survey Monumentation and Boundary Marking N/A 8/13/2018 As-built/Baseline Year 0 Monitoring Report Submittal 6/23/2018 12/3/2018 Year 1 Monitoring Report Submittal 11/24/2018 12/4/2018 Year 2 Monitoring Report Submittal Year 3 Monitoring Report Submittal Year onitoring Report Submittal Year 5 Monitoring Report Submittal Year 6 Monitoring Report Submittal Year 7 Monitoring Report Submittal Table 3. Project Contacts Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Mitigation Provider Water & Land Solutions, LLC 7721 Six Forks Road, Suite 130, Raleigh, NC 27615 Primary Project POC Catherine Manner Phone: 571-643-3165 Construction Contractor RiverWorks Construction 114 W. Main Street, Suite 106, Clayton, NC 27520 Primary Project POC Bill Wright Phone: 919-590-5193 Survey Contractor (Existing WithersRavenel Condition Surveys) 115 MacKenan Drive, Cary, NC 27511 Primary Project POC Marshall Wight, PLS Phone: 919-469-3340 Survey Contractor (Conservation True Line Surveying, PC Easement, Construction and As- Builts Surveys) 205 West Main Street, Clayton, NC 27520 Primary Project POC Curk T. Lane, PLS 919-359-0427 Planting Contractor RiverWorks Construction 114 W. Main Street, Suite 106, Clayton, NC 27520 Primary Project POC Bill Wright Phone: 919-590-5193 Seeding Contractor RiverWorks Construction 114 W. Main Street, Suite 106, Clayton, NC 27520 Primary Project POC Bill Wright Phone: 919-590-5193 Seed Mix Sources Green Resource 5204 Highgreen Ct., Colfax, NC 27235 Rodney Montgomery Phone: 336-215-3458 Nursery Stock Suppliers Foggy Mountain Nursery (Live Stakes) 797 Helton Creek Rd, Lansing, NC 28643 Glenn Sullivan Phone: 336-977-2958 Dykes & Son Nursery (Bare Root Stock) 825 Maude Etter Rd, Mcminnville, Tn 37110 Jeff Dykes Phone: 931-668-8833 Monitoring Performers Water & Land Solutions, LLC 7721 Six Forks Road, Suite 130, Raleigh, NC 27615 Stream Monitoring POC Emily Dunnigan Phone: 269-908-6306 Vegetation Monitoring POC Emily Dunnigan Phone: 269-908-6306 Table 4. Project Information and Attributes Project Name Edwards -Johnson Mitigation Project County Johnston Project Area (acres) 11.0 Project Coordinates (latitude and longitude) 35.7245361 N,-78.3570806 W Planted Acreage (Acres of Woody Stems Planted) 3.69 Project Watershed Summary Information Physiographic Province Piedmont River Basin Neuse USGS Hydrologic Unit 8-digit 03020201 DWR Sub -basin 30406 Project Drainage Area (Acres and Square Miles) 223 acres, 0.35 sq mi Project Drainage Area Percentage of Impervious Area 12.30% CGIA Land Use Classification 2.01.03, 2.99.05, 413, 4.98 (33% crops/hay, 16% pasture, 51 % mixed forest) Reach Summary Information Parameters Reach 1 Reach 2 Reach 3 (upper) Length of reach (linear feet) 611 1173 770 Valley confinement (Confined, moderately confined, unconfined) unconfined unconfined unconfined Drainage area (Acres and Square Miles) 96 acres, 0.15 sq mi 120 acres, 0.19 sq mi 211 acres, 0.33 sq mi Perennial, Intermittent, Ephemeral Intermittent Perennial Perennial NCDWR Water Quality Classification C; NSW C; NSW C;NSW Stream Classification (existing) C5 G5c E5(incised) Stream Classification (proposed) C5 C5 C5 Evolutionary trend (Simon) I III/IV IV FEMA classification N/A N/A N/A Wetland Summary Information Parameters Wetland 1 Wetland 2 Wetland 3 Size of Wetland (acres) N/A N/A N/A Wetland Type (non -riparian, riparian riverine or riparian non-riverine) Mapped Soil Series Drainage class Soil Hydric Status Source of Hydrology Restoration or enhancement method (hydrologic, vegetative etc.) Regulatory Considerations Parameters Applicable? Resolved? Supporting Docs? Water of the United States - Section 404 Yes Yes Categorical Exclusion Water of the United States - Section 401 Yes Yes Categorical Exclusion Endangered Species Act No Yes Categorical Exclusion Historic Preservation Act No N/A Categorical Exclusion Coastal Zone Management Act (CZMA or CAMA) No N/A N/A FEMA Floodplain Compliance Yes Yes Categorical Exclusion Essential Fisheries Habitat No N/A Categorical Exclusion Reach 3 (lower) I Reach 4 130 11176 unconfined lunco 223 acres, 0.35 sq 155 acres, 0.09 sq mi Perennial II ntermittent C; NSW IC; NSW L?1", Zone AE III►/0V Appendix B —Visual Assessment Data FJ Edwards -Johnson Mitigation Project _ ! ••- ,+fir Legend _ 1 • rt "'IF 6;' {Conservation Easement � }�Y� ' . � �' ', , - .u� `Crest Gauge + � Flow Gauge � _ ' - 0 Photo Points - Rd _ X x Stream Problem Area �gC� 0 Encroachment Area Planted (0.04 acres)�aK6 „y �{ Stream Reference Site Location Water Quality Features` r Pre -Construction Wetlands (2.4 acres) --- Top of Streambank Stream Mitigation Type Preservation "'• s - Stream Bank Erosion Restoration Restoration (Field Adjustment) '- . R2 CVS Plots " 0 Success Criteria Met ! '+ •' �`' '` _ o 0 Success Criteria Not Met Low Stem Density Areas o °' Planted o 0PS-5 Xs_� No (0.35 acres) o N Yes (0.43 acres) N fN 3-41 Stream Bank Erosion g N PS-7 O O+ aU9e 7 SM+ r^ 7 PS-9 t eC) o �� 7� A. ;y PS 12 R3 (upp0— — BPS-13o 4 0 PS- 0 M 0, o 1 ' PS-10 R4 WrR3 (lower)/o met/anh 6i. Ilk U. a t R1 F I. PS-1v� PS-3 Access point: 35.72617' 78.35283° ELL— � - T � ��� t-- '� Aerial: Google Earth Winter 2019 w TM NCDMS Contract No. 6825 Current Conditions FIGURE WATER & LAND Edwards -Johnson Mitigation Project NCDMS Project No. 97080 Plan View SOLUTIONS Johnston County, North Carolina December 2020 Monitoring Year 3 MY3 NAD 1983 2011 State Plane North Carolina FIPS 3200 FT US Table 5. Visual Stream Morphology Stability Assessment Project Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Reach ID R1, R2, R3 (upper) and R3 (lower) Assessed Length 3609 Number Number with Footage with Adjusted % for Stable, Number of Amount of % Stable, Stabilizing Stabilizing Stabilizing Major Channel Channel Performing as Total Number Unstable Unstable Performing as Woody Woody Woody Cate o Sub-Cateaory Metric Intended in As -built Segments Foota a Intended Vegetation Vegetation Vegetation 1. Bank 1. Scoured/Eroding Bank lacking vegetative cover resulting simply from poor growth and/or scour and erosion 1 15 100% 0 0 100 Banks undercut/overhanging to the extent that mass wasting appears 2. Undercut likely. Does NOT include undercuts that are modest, appear 1 10 100% 0 0 100 sustainable and are providing habitat. 13. Mass Wasting Bank slumping, calving, or collapse 0 0 100% 0 0 100% Totals 2 25 100% 0 0 100 2. Engineered Structures 1. Overall Integrity Structures physically intact with no dislodged boulders or logs. 47 47 100 2. Grade Control Grade control structures exhibiting maintenance of grade across the sill. 24 24 100% 2a. Piping Structures lacking any substantial flow underneath sills or arms. 11 11 100 Bank erosion within the structures extent of influence does not 3. Bank Protection exceed 15 % . (See guidance for this table in EEP monitoring 14 14 100 guidance document) Pool forming structures maintaining — Max Pool Depth : Mean 4. Habitat Bankfull Depth ratio > 1.6 Rootwads/logs providing some cover at 12 12 100 base -flow. Table 5a. Vegetation Condition Assessment Project Edwards -Johnson Mitigation Project (NCDEQ DMS Project IN 97080) Planted Acreage 3.6 Mapping CCPV Number of Combined % of Planted Ve etation Category Definitions Threshold Depiction Polygons Acreage Acrea e Pattern and 1. Bare Areas Very limited cover of both woody and herbaceous material. 1 acre 0 0.00 0.0% Color 2. Low Stem Density Areas Woody stem densities clearly below target levels based on MY3, 4, or 5 stem count criteria. 0.1 acres solid light blue 1 0.35 9.7% Total 1 0.35 9.7% Pattern and 3. Areas of Poor Growth Rates or Vigor Areas with woody stems of a size class that are obviously small given the monitoring year. 0.25 acres 0 0.00 0.0% Color Cumulative Total 1 0.35 9.7% Easement Acreage 10.97 Mapping CCPV Number of Combined % of Easement Ve etation Category Definitions Threshold Depiction Polygons Acreage Acreage Pattern and 4. Invasive Areas of Concern Areas or points (if too small to render as polygons at map scale). 1000 SF 0 0.00 0.0% Color Pattern and 5. Easement Encroachment Areas3 Areas or points (if too small to render as polygons at map scale). none 0 0.00 0.0% Color 1 = Enter the planted acreage within the easement. This number is calculated as the easement acreage minus any existing mature tree stands that were not subject to supplemental planting of the understory, the channel acreage, crossings or any other elements not directly planted as part of the project effort- 2 = The acreage within the easement boundaries- 3 = Encroachment may occur within or outside of planted areas and will therefore be calculated against the overall easement acreage. In the event a polygon is cataloged into items 1, 2 or 3 in the table and is the result of encroachment, the associated acreage should be tallied in the relevant item (i.e., item 1,2 or 3) as well as a parallel tally in item 5. 4 = Invasives may occur in or out of planted areas, but still within the easement and will therefore be calculated against the overall easement acreage. Invasives of concern/interest are listed below. The list of high concern spcies are those with the potential to directly outcompete native, young, woody stems in the short-term (e.g. monitoring period or shortly thereafter) or affect the community structure for existing, more established tree/shrub stands over timeframes that are slightly longer (e.g. 1-2 decades). The low/moderate concern group are those species that generally do not have this capacity over the timeframes discussed and therefore are not expected to be mapped with regularity, but can be mapped, if in the judgement of the observer their coverage, density or distribution is suppressing the viability, density, or growth of planted woody stems. Decisions as to whether remediation will be needed are based on the integration of risk factors by EEP such as species present, their coverage, distribution relative to native biomass, and the practicality of treatment. For example, even modest amounts of Kudzu or Japanese Knotweed early in the projects history will warrant control, but potentially large coverages of Microstegium in the herb layer will not likley trigger control because of the limited capacities to impact tree/shrub layers within the timeframes discussed and the potential impacts of treating extensive amounts of ground cover. Those species with the "watch list" designator in gray shade are of interest as well, but have yet to be observed across the state with any frequency. Those in red italics are of particular interest given their extreme dsktthreat level for mapping as points where isolated specimens are found, particularly ealry in a projects monitoring history. However, areas of discreet, dense patches will of course be mapped as polygons. The symbology scheme below was one that was found to be helpful for symbolzing invasives polygons, particulalry for situations where the conditon for an area is somewhere between isolated specimens and dense, discreet patches. In any case, the point or polygon/area feature can be symbolized to describe things like high or low concern and species can be listed as a map inset, in legend items if the number of species are limited or in the narrative section of the executive summary. PS-1, Reach R1, facing upstream, April 12, 2018 (MY-00) PS-1, Reach R1, facing upstream, March 10, 2020 (MY-03) IL PS-2, Reach R1, facing downstream, Dec 6, 2018 (MY-01) PS-2, Reach R1, facing downstream, March 10, 2020 (MY-03) PS-3, Reach R2, facing upstream, Sta 17+00, April 23, 2018 (MY-00) t. �' 1, Vw' ;;eLdy i PS-3, Reach R2, facing upstream, Sta 17+00, March 10, 2020 (MY-03) r Y fuai>I 4 iil L I��� ` 57 AMR, 75Y, f PS-5, Reach R2, facing downstream, Sta 19+50, Sept 17, 2018 (MY-00) ,: c. _- - -momrw PS-6, Reach R2, facing upstream, Sta 20+75, April 23, 2018 (MY-00) PS-5, Reach R2, facing downstream, Sta 19+50 , March 10, 2020 (MY-03) AR PS-7, Reach R2, facing downstream, Sta 21+00, April 23, 2018 (MY-00) PS-8, Reach R2, facing downstream, Sta 24+50, March 10, 2020 (MY-03) 4111 jilt PS-9, Reach R2, facing upstream, Sta 25+75, April 23, 2018 (MY-00) A Mk � w � RAW PS-10, Reach R3, facing downstream, Sta 32+00, April 19, 2018 (MY-00) fig;¢ I ) r y + t S. ay � I _ .s PS-9, Reach R2, facing upstream, Sta 25+75, March 10, 2020 (MY-03) i F � A. PS-10, Reach R3, facing downstream, Sta 32+00, March 10, 2020 (MY-03) r. As p , x- `4 r -s PS-11, Reach R4, facing upstream, Sta 13+00, June 11, 2018 (MY-00) 5 c .f PS-11, Reach R4, facing downstream, Sta 13+00, June 11, 2018 (MY-00) ClW 1 a.. 1 t 4 d PS-11, Reach R4, facing downstream, Sta 13+00, March 10, 2020 (MY-03) , PS-12, Reach R4, facing upstream, Sta 14+00, June 11, 2018 (MY-00) PS-13, Reach R4, facing upstream, Sta 17+00, June 11, 2018 (MY-00) PS-12, Reach R4, facing upstream, Sta 14+00, March 10, 2020 (MY-03) v Lq-a— "L**' A ll w ti A ism Veg Plot 1, May 14, 2018 (MY-00) Veg Plot 1, October 13, 2020 (MY-03) t `} S i «:.•, a it .. f ' • �. �.°' � � -- -.� fir_ - ���-.•}.• Veg Plot 2, May 14, 2018 (MY-00) Veg Plot 2, October 13, 2020 (MY-03) ,. i yy i WPM,wy • • 4 qji�:�¢ `' s — `RZ'h ':':1¢pJ'p`.• + 1 wv' ���IW�w:;R C.,,Ti. .'vN'l y:•:.' Y �;r ��,... � � 5i'`` "i s� i r; _ v }�dR ! 3.,yFa fr 8!f a•' $ &�W 7 f,5 14 't ¢ w r _ � Veg Plot 3, May 14, 2018 (MY-00) Veg Plot 3, October 13, 2020 (MY-03) Mn I i ww" L F T: a r x 7 ,, Veg Plot 4, May 14, 2018 (MY-00) Veg Plot 4, October 13, 2020 (MY-03) *plot origin at corner to the right Appendix C — Vegetation Plot Data FJ Edwards -Johnson Mitigation Project Edwards Johnson Mitigation Project Table 6: Planted and Total Stem Counts Current Plot Data (MY3 2020) Annual Means Scientific Name Common Name Species Type 003-01-0001 003-01-0002 003-01-0003 003-01-0004 MY3 (2020) MY2 (2019) MYl (2018) MYO (2018) PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T PnoLS P-all T Acer rubrum Tree 4 4 1 1 5 2 1 2 17 1 1 1 Alnus serrulata Tag Alder, Smooth AU Shrub Tree 3 3 3 Betula nigra River Birch, Red Birch Tree 4 4 4 2 2 2 2 2 2 8 8 8 6 6 6 7 7 7 8 8 8 Carpinus caroliniana Shrub Tree 2 2 2 Cornus amomum Silky Dogwood Shrub Tree 2 2 2 2 2 2 1 1 1 5 5 5 4 4 4 5 5 5 8 8 8 Cornus florida Flowering Dogwood Shrub Tree 2 Diospyros virginiana American Persimmon, Tree 1 1 1 Fraxinus pennsylvanica Green Ash, Red Ash Tree 1 1 1 1 1 1 2 2 2 4 4 4 4 4 4 4 4 5 4 4 4 Ilex verticillata Winterberry Shrub Tree 1 1 1 Lindera benzoin Northern Spicebush Shrub Tree 1 1 1 2 2 2 1 1 1 4 4 4 4 4 4 8 8 8 11 11 11 Liquidambar styraciflua Sweet Gum, Red Gum Tree 2 1 1 4 7 4 Liriodendron tulipifera Tree 2 1 3 3 3 3 3 6 2 11 7 7 7 Platanus occidentalis Sycamore, Plane -tree Tree 5 5 5 1 1 1 2 2 2 2 2 2 10 10 10 8 8 9 7 7 8 10 10 10 Quercus michauxii Basket Oak, Swamp Ch Tree 2 2 2 2 2 2 2 2 2 3 3 3 4 4 4 Quercus nigra Water Oak, Paddle Cal Tree 1 1 1 1 1 1 1 1 1 2 2 2 6 6 6 Quercus phellos Willow Oak Tree 3 3 3 1 1 1 4 4 4 3 3 3 8 8 10 7 7 7 Rhus copallinum Shrub Tree Rhus typhina Staghorn Sumac Shrub 1 Salix nigra Black Willow Tree 2 6 Sambucuscanadensis Common Elderberry Shrub Tree 1 1 5 Ulmus rubra Slippery Elm, Red Elm ITree 2 Stem count size (ares) size (ACRES) Species count Stems per ACRE 13 13 19 9 9 12 8 8 10 11 11 12 41 41 53 33 33 51 49 491 97 70 70 70 1 1 1 1 4 4 4 4 0.02 0.02 0.02 0.02 0.10 0.10 0.10 0.10 51 51 71 51 51 7 5 5 7 6 6 7 9 9 12 9 9 13 11 11 17 12 12 12 526.1 526.1 768.9 364.2 364.2 485.6 323.7 323.7 404.7 445.2 445.2 485.6 414.8 414.8 536.2 333.9 333.9 516 495.7 495.7 981.41 708.21 708.21 708.2 Table 6b: February 2020 Replanting List Quantity Species Type 50 eetula nigra bare root 50 Plantanus occidentalis bare root 25 Quercus michauxii bare root 50 eetula nigra 1 gallon 20 Quercus michauxii 1 gallon 25 Acer rubrum 1 gallon 25 Liriodendron tulipifera 1 gallon FJ Appendix D — Stream Measurement and Geomorphology Data Edwards -Johnson Mitigation Project Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R2 Cross Section ID XS-1 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 244.5 Low Bank Height Elevation (ft) 244.4 Bankfull Max Depth (ft) 1.3 Low Bank Height (ft) 1.2 Bank Height Ratio 0.9 Bankfull X-section Area (ft2) 4.9 % Change Bank Height Ratio 10.0% Looking Downstream XS-1 Riffle, STA 18+77 Baseline MYO MY1 —MY2 MY3 — — Bankfull Elevation Floodprone Area 248 247 y 246 w 0 245 r w 244 243 242 0 5 10 15 20 25 30 35 40 45 Width (feet) * Bank Height Ratio is calculated based on MY1 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfull dimensions are calculated based on the current year's low bank height. MY1 used in place of as -built (MYO) due to issues with the as -built survey standards identified during MY1. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project 497080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R2 Cross Section ID XS-2 Field Crew K. Obermiller, E. Dunnigan Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 241.1 Low Bank Height Elevation (ft) 241.1 Bankfull Max Depth (ft) 1.9 Low Bank Height (ft) 1.9 Bank Height Ratio 1.0 Bankfull X-section Area (ftz) 6.5 Change Bank Height Ratio 0.0% Looking Downstream XS-2 Pool, STA 21+14 Baseline MYO MY1 MY2 MY3 — — Bankfull Elevation Floodprone Area 244 243 a) 242 0 241 ------------------------------------------- ------------------ ----------------- --- VV d w 240 239 238 0 5 10 15 20 25 30 35 40 45 Width (feet) *Bank Height Ratio is calculated based on MY7 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfull dimensions are calculated based on the current year's low bank height. MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY7. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project 497080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R4 Cross Section ID XS-3 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 239.5 Low Bank Height Elevation (ft) 239.5 Bankfull Max Depth (ft) 2.3 Low Bank Height (ft) 2.3 Bank Height Ratio 1.0 Bankfull X-section Area (ftz) 11.0 Change Bank Height Ratio 0.0% Looking Downstream XS-3 Pool, STA 16+43 Baseline MYO MY1 MY2 MY3 — — Bankfull Elevation Floodprone Area 242 241 a) 240 0 239 d w 238 237 236 0 5 10 15 20 25 30 35 40 45 Width (feet) *Bank Height Ratio is calculated based on MY7 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfull dimensions are calculated based on the current year's low bank height. MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY7. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project 497080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R4 Cross Section ID XS-4 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 238.9 Low Bank Height Elevation (ft) 238.9 Bankfull Max Depth (ft) 0.9 Low Bank Height (ft) 1.0 Bank Height Ratio 1.0 Bankfull X-section Area (ftz) 5.2 Change Bank Height Ratio 0.0% Looking Downstream XS-4 Riffle, STA 16+97 Baseline MYO MY1 MY2 MY3 — — Bankfull Elevation Floodprone Area 242 241 a) 240 0 239 d w 238 237 236 0 5 10 15 20 25 30 35 40 45 Width (feet) *Bank Height Ratio is calculated based on MY7 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfull dimensions are calculated based on the current year's low bank height. MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY7. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project 497080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R3 Cross Section ID XS-5 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 234.3 Low Bank Height Elevation (ft) 234.4 Bankfull Max Depth (ft) 1.4 Low Bank Height (ft) 1.5 Bank Height Ratio 1.0 Bankfull X-section Area (ftz) 4.7 Change Bank Height Ratio 0.0% Looking Downstream XS-5 Riffle, STA 28+24 Baseline MYO —MY1 — MY2 MY3 — — Bankfull Elevation Floodprone Area 237 236 y v 235 0 234 ------------------- - -------------------------- ------- d w 233 232 231 0 5 10 15 20 25 30 35 40 45 Width (feet) Bank Height Ratio is calculated based on MY1 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfu# dimensions are calculated based on the current year's low bank height. " MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY1. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project #97080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project Project ID 97080 ReachlD R3 Cross Section ID XS-6 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 233.0 Low Bank Height Elevation (ft) 233.3 Bankfull Max Depth (ft) 1.4 Low Bank Height (ft) 1.7 Bank Height Ratio 1.2 Bankfull X-section Area (ftz) 5.6 Change Bank Height Ratio 20.0% Looking Downstream XS-6 Pool, STA 29+56 Baseline MYO —MY1 MY2 MY3 — — Bankfull Elevation Floodprone Area 236 235 y 234 - 0 233 ---------------------------------------------------------------- m w 232 231 230 0 5 10 15 20 25 30 35 40 45 Width (feet) Bank Height Ratio is calculated based on MY1 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfu# dimensions are calculated based on the current year's low bank height. " MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY1. Edwards Johnson Mitigation Project Water and Land Solutions DMS Project #97080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project ProjectID 97080 Reach ID R3 (Multi -Thread Channel) Cross Section ID XS-7 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 230.7 Low Bank Height Elevation (ft) 230.6 Bankfull Max Depth (ft) 0.4 Low Bank Height (ft) 0.4 Bank Height Ratio 0.9 Bankfull X-section Area (ftz) 4.7 Change Bank Height Ratio 10.0% Looking Downstream XS-7 Riffle, STA 33+18 Baseline MYO —MY1 - MY2 MY3 - - -Bankfull Elevation — Floodprone Area 235 234 y 233 0 232 m w 231 --------------------------------------- --------------------------- ------ -- ------------------------------------ 230 229 0 10 20 30 40 50 60 70 80 90 Width (feet) Bank Height Ratio is calculated based on MY1 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfu# dimensions are calculated based on the current year's low bank height. " MY1 used in place of as -built (MY0) due to issues with the as -built survey standards identified during MY1. "" X7 right and left pins extended per request after MY1 Edwards Johnson Mitigation Project Water and Land Solutions DMS Project #97080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Project Name Edwards -Johnson Mitigation Project ProjectID 97080 Reach ID R3 (Multi -Thread Channel) Cross Section ID XS-8 Field Crew E. Dunnigan, N. Childs Dimension Data Summary: MY3 2020 Bankfull Elevation (ft) 233.2 Low Bank Height Elevation (ft) 233.2 Bankfull Max Depth (ft) 0.7 Low Bank Height (ft) 0.7 Bank Height Ratio 1.0 Bankfull X-section Area (ftz) 4.7 Change Bank Height Ratio 0.0% Looking Downstream XS-8 Riffle, STA 30+50 -MY2 MY3 — — Bankfull Elevation —Floodprone Area 236 235 m 234 c 0 233 ---- ---- ------- --- ------------------- ---------- -------------------- --------- ------ w 232 231 0 20 40 60 80 100 120 140 Width (feet) Bank Height Ratio is calculated based on MY1 cross -sectional area as described in the Standard Measurement of the BHR Monitoring Parameter document produced by the technical industry work group consisting of the NCIRT, NCDMS, and Industry Practitioner sin NC (912018). The remainder of the bankfu# dimensions are calculated based on the current year's low bank height. " MY2 used in place of as -built (MY0) for BHR calculations. "'XS-8 was added during MY1 post -monitoring site visit Edwards Johnson Mitigation Project Water and Land Solutions DMS Project #97080 Annual Monitoring Report October 2020 Monitoring Year 3 of 7 Edwards -Johnson Figure 3: Pebble Count Date Collected 9/21/2018 10/18/2019 9/30/2020 MY 1 MY2 MY3 MY4 MY5 MY6 MY7 MATERIAL PARTICLE SIZE (mm) Total # Total # Total # Total # Total # Total # Total # SILT/CLAY Silt/Clay <.063 7 5 4 Very Fine .063-.125 4 6 2 Fine .125-.25 14 7 20 S A N Medium .25-.50 19 8 =LMACoarse .50 -1.0 19 20 19 Very Coarse 1.0-2.0 19 13 17 Very Fine 2.0-2.8 7 7 1 30 �0 �, 7 VeryFine 2.8-4.0 4 7 2 ,0 � 01 Fine 4.0-5.6 2 7 2 Fine 5.6-8.0 4 11 Medium 8.0-11.0 1 3 7 Medium 11.0 - 16.0 1 6 9 c Coarse 16-22.6 1 4 2 00^ 0J Coarse 22.6 - 32 2 3 1 Very Coarse 32-45 1 0 00 �p Very Coarse 45 - 64 2 _ Small 64-90 Small 90 - 128 COBBLE Large 128 - 180 Large 180-256 Small 256 - 362 Small 362 - 512 Medium 512 - 1024 Q. Large -Very Large 1024-2048 BEDROCK Bedrock > 2048 11001 1001 100 Total Cumulative MY3 D16 0.16 0.2 0.18 D35 0.36 0.66 0.69 D50 0.62 1.1 1.2 D65 1.1 2.5 4 D84 2.4 7.8 11 D95 N/A 19 19 Riffle Pool Channel materials Channel materials D16 = 0.51 D16 = 0.15 D35 = 1.1 D35 = 0.2 D50 = 1.7 D50 = 0.25 D65 = 6.2 D65 = 0.78 D84 = 9.8 D84 = 14 D95 = 151 D95 = 49 Weighted pebble count by bed features Edwards-Jonhson Mitigation Project 70% riffle 30% pool weighted percent Riffle Pool -# of particles 100% 90% 80% 70% L 60% C_ 50% C 40% a 30% 20% 10% 0% 0.25 0.2 m cQ' m Q 0.15 ID 0.1 m o' 0.05 a, v 0 m 0.01 0.1 1 10 100 1000 10000 particle size (mm) Table 7a. Baseline Stream Data Summary Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Parameter Pre - Restoration Condition Reference Reach Data Design As -Built/ Baseline Reach ID: R1 (Preservation) Dimension (Riffle) Min Max Min Max Min Max Min Max Bankfull Width (ft) 5.5 7.2 4.5 8.3 - - - - Floodprone Width (ft) 30.0 80.0 10.0 20.0 - - - - Bankfull Mean Depth (ft) 0.4 0.8 0.8 1.6 - - - - Bankfull Max Depth (ft) 0.5 0.9 0.9 1.3 - - - - Bankfull Cross Sectional Area ftZ 4.1 5.0 3.0 5.0 - - - - Width/Depth Ratio 8.2 15.2 6.2 14.2 - - - - Entrenchment Ratio 4.2 12.0 7.1 8.4 - - - - Bank Height Ratiol 1.1 1 1.1 0.9 1.1 - - - - Profile Riffle Length (ft) 7.5 38.2 9.5 22.7 - - - - Riffle Slope (ft/ft) 0.011 0.014 0.009 0.015 - - - - Pool Length (ft) 4.1 7.9 6.1 8.7 - - - - Pool Max Depth (ft) 1.2 1.4 1.8 2.4 - - - - Pool Spacing (ft)l 22.0 1 50.0 1 14.4 1 22.3 1 - - - - Pattern Channel Beltwidth (ft) 22.0 28.0 23.4 29.0 - - - - Radius of Curvature (ft) 11.3 19.1 11.2 17.5 - - - - Rc:Bankfull Width (ft/ft) 1.6 2.9 1.6 2.5 - - - - Meander Wavelength (ft) 27.0 60.0 43.4 65.1 - - - - Meander Width Ratiol 2.2 6.4 3.9 4.5 - - - - Transport Parameters Boundary Shear Stress Ib/ftZ' - - - - Max part size (mm) mobilized at bankful - - - - Stream Power(W/m2) - - - - Additional Reach Parameters Rosgen Classification C5 E5/C5 E5/C5 E5/C5 Bankfull Velocity (fps) 4.1 4.5 - - Bankfull Discharge (cfs) 20.0 --- - - Sinuosity 1.21 1.1 - 1.3 - - Water Surface Slope (Channel) (ft/ft)l 0.010 0.015 - - Bankfull Slope (ft/ft)l 0.012 1 0.015 1- - Parameter Pre -Restoration Condition Reference Reach Data Design As -Built/ Baseline Reach ID: R2 Dimension (Riffle) Min Max Min Max Min Max Min Max Bankfull Width (ft) 4.4 7.2 4.5 8.3 7.7 8.9 Floodprone Width (ft) 30.0 70.0 10.0 20.0 20.0 50.0 32.0 Bankfull Mean Depth (ft) 0.4 0.8 0.8 1.6 0.6 0.6 Bankfull Max Depth (ft) 1.3 1.5 0.9 1.3 0.9 1.2 Bankfull Cross Sectional Area (ff) 3.3 5.1 3.0 5.0 5.0 5.0 Width/Depth Ratio 8.2 15.2 6.2 14.2 12.0 16.0 Entrenchment Ratio 4.3 10.0 7.1 8.4 2.2 3.6 Bank Height Ratio 1.1 1.6 0.9 1.1 1.0 1.0 Profile Riffle Length (ft) 17.0 44.0 9.5 22.7 10.0 30.0 12.0 34.0 Riffle Slope (ft/ft) 0.011 0.013 0.009 0.015 0.010 0.022 0.017 0.029 Pool Length (ft) 3.9 6.0 6.1 8.7 6.0 9.0 6.2 9.9 Pool Max Depth (ft) 1.2 1.3 1.8 2.4 1.1 1.5 1.1 1.6 Pool Spacing (ft)l 22.0 1 39.0 1 14.4 1 22.3 1 30.0 1 55.0 1 11.8 36.1 Pattern Channel Beltwidth (ft) 28.0 23.4 29.0 28.0 51.0 27.0 46.0 Radius of Curvature (ft) 11.3 19.1 11.2 17.5 15.0 25.0 13.0 29.0 Rc:Bankfull Width (ft/ft) 1.6 2.9 1.6 2.5 2.0 3.0 2.1 3.5 Meander Wavelength (ft) 31.0 45.0 43.4 65.1 55.0 100.0 35.0 88.0 Meander Width Ratiol 2.3 6.4 3.9 4.5 3.0 1 8.0 4.4 7.6 Transport Parameters Boundary Shear Stress Ib1fe" - - 0.49 - Max part size (mm) mobilized at bankful - - 2.00 - Stream Power W/M2 - - 31.00 - Additional Reach Parameters Rosgen Classification G5 E5/C5 C5 C5 Bankfull Velocity (fps) 4.1 4.5 4.7 4.7 Bankfull Discharge (cfs) 26.0 - 26.0 26.0 Sinuosity 1.16 1.1 -1.3 1.17 1.17 Water Surface Slope (Channel) (ft/ft)l 0.011 0.015 0.011 0.012 Bankfull Slope (ft/ft)l 0.012 1 0.015 1 0.012 1 0.013 Parameter Pre -Restoration Condition Reference Reach Data Design As -Built/ Baseline Reach ID: R3 (lower) Preservation Dimension (Riffle) Min Max Min Max Min Max Min Max Bank -full Width (ft) 4.4 7.2 4.5 8.3 - - - - Floodprone Width (ft) 30.0 70.0 10.0 35.0 - - - - Bank -full Mean Depth (ft) 0.4 0.8 0.8 1.6 - - - - Bank -full Max Depth (ft) 0.5 0.9 0.9 1.3 - - - - Bank -full Cross Sectional Area ft2) 3.3 5.3 3.0 5.0 - - - - Width/Depth Ratio 8.0 20.0 6.2 14.2 - - - - Entrenchment Ratio 3.0 8.0 7.1 8.4 - - - - Bank Height Ratiol 1.0 1 - 1 0.9 1.1 1 - - - - Profile Riffle Length (ft) 11.0 22.0 9.5 22.7 - - - - Riffle Slope (ft/ft) 0.008 0.009 0.009 0.015 - - - - Pool Length (ft) 5.0 8.0 6.1 8.7 - - - - Pool Max Depth (ft) 1.3 1.7 1.8 2.4 - - - - Pool Spacing (ft)l 22.0 1 39.0 1 14.4 1 22.3 1 - I - -I - Pattern Channel Beltwidth (ft) 28.0 40.0 23.4 29.0 - - - - Radius of Curvature (ft) 11.0 19.0 11.2 17.5 - - - - Rc:Bankfull Width (ft/ft) 1.6 2.9 1.6 2.5 - - - - Meander Wavelength (ft) 27.0 50.0 43.4 65.1 - - - - Meander Width Ratiol 6.4 1 8.5 1 3.9 1 4.5 1 - I - - - Transport Parameters Boundary Shear Stress Ib/ft2) - - 0.49 - Max part size (mm) mobilized at bank -full - - 2.00 - Stream Power W/m2) - 1 29.00 - Additional Reach Parameters Rosgen Classification E5 E5/C5 - - Bank -full Velocity (fps) 4.1 4.0 - - Bank -full Discharge (cfs) 37.0 - - - Sinuosity 1.21 1.1 -1.3 - - Water Surface Slope (Channel) (ft/ft)l 0.008 1 0.015 1 - I - Bank -full Slope (ft/ft)l 0.009 1 0.015 1 - I - Parameter Pre -Restoration Condition Reference Reach Data Design As -Built/ Baseline Reach ID: R3 (upper) Dimension (Riffle) Min Max Min Max Min Max Min Max Bankfull Width (ft) 4.4 7.2 4.5 8.3 8.2 8.8 18.4 Floodprone Width (ft) 30.0 70.0 10.0 35.0 30.0 80.0 38.0 27.0 Bankfull Mean Depth (ft) 1.0 1.8 0.8 1.6 0.7 0.6 0.3 Bankfull Max Depth (ft) 1.5 2.3 0.9 1.3 1.0 1.0 0.4 Bankfull Cross Sectional Area (ff) 3.3 3.0 5.0 5.6 5.5 4.7 Width/Depth Ratio 8.2 15.2 6.2 14.2 12.0 14.3 71.8 Entrenchment Ratio 4.3 10.0 7.1 8.4 3.7 8.0 4.3 1.5 Bank Height Ratiol 1.1 1 1.7 1 0.9 1 1.1 1.0 1.0 1.0 Profile Riffle Length (ft) 33.0 55.0 9.5 22.7 12.0 33.0 10.0 30.0 Riffle Slope (ft/ft) 0.007 0.009 0.009 0.015 0.011 0.014 0.020 0.035 Pool Length (ft) 8.0 13.0 6.1 8.7 8.0 11.0 7.0 10.0 Pool Max Depth (ft) 1.4 2.0 1.8 2.4 1.4 2.0 1.1 1.6 Pool Spacing (ft)l 22.0 1 39.0 1 14.4 1 22.3 1 25.0 1 51.0 1 11.8 35.5 Pattern Channel Beltwidth (ft) 28.0 23.4 29.0 25.0 45.0 30.0 45.0 Radius of Curvature (ft) 10.0 11.2 17.5 12.0 22.0 15.0 25.0 Rc:Bankfull Width (ft/ft) 1.6 1.6 2.5 2.0 3.0 2.5 4.2 Meander Wavelength (ft) 27.0 43.4 65.1 30.0 42.0 30.0 44.8 Meander Width Ratiol 6.4 3.9 4.5 3.3 1 5.1 5.1 7.6 Transport Parameters Boundary Shear Stress Ib/fe" - - 0.51 - Max part size (mm) mobilized at bankful - - 2.00 - Stream Power W/M2 - - 28.90 - Additional Reach Parameters Rosgen Classification E5 incised E5/C5 C5 C5 Bankfull Velocity (fps) 4.1 4.5 5.7 4.5 Bankfull Discharge (cfs) 34.0 - 34.0 34.0 Sinuosity 1.20 1.1 - 1.3 1.20 1.16 Water Surface Slope (Channel) (ft/ft)l 0.007 0.015 0.009 0.009 Bankfull Slope (ft/ft)l 0.009 1 0.015 1 0.011 1 0.011 Parameter Pre -Restoration Condition Reference Reach Data Design As -Built/ Baseline Reach ID: R4 Dimension (Riffle) Min Max Min Max Min Max Min Max Bankfull Width (ft) 6.9 - 4.5 8.3 6.6 8.8 Floodprone Width (ft) 6.1 - 10.0 35.0 25.0 70.0 38.0 Bankfull Mean Depth (ft) 2.4 - 0.8 1.6 0.5 0.6 Bankfull Max Depth (ft) 3.1 - 0.9 1.3 0.7 1.0 Bankfull Cross Sectional Area ft) 15.8 - 3.0 5.0 3.6 5.5 Width/Depth Ratio 5.6 - 10.3 14.2 12.0 14.3 Entrenchment Ratio 1.0 - 2.0 5.0 3.8 10.0 4.3 Bank Height Ratiol 1.7 1 - 0.9 1 1.1 1 1.0 1.0 Profile Riffle Length (ft) 17.0 44.0 5.1 13.9 13.0 31.0 12.0 27.0 Riffle Slope (ft/ft) 0.019 0.027 0.017 0.026 0.016 0.027 0.015 0.027 Pool Length (ft) 4.0 6.6 4.5 7.0 6.8 9.4 6.0 8.7 Pool Max Depth (ft) 1.9 2.2 1.1 1.7 1.1 1.6 1.1 1.6 Pool Spacing (ft)l 38.0 1 87.0 1 10.0 1 30.0 1 22.0 1 50.0 1 19.0 41.0 Pattern Channel Beltwidth (ft) - - 23.4 29.0 22.0 35.0 19.0 31.0 Radius of Curvature (ft) - - 11.2 17.5 12.0 20.0 10.0 19.0 Rc:Bankfull Width (ft/ft) - - 1.6 2.5 1.8 3.0 2.1 3.4 Meander Wavelength (ft) - - 43.4 65.1 40.0 60.0 34.0 77.0 Meander Width Ratio - I - 1 3.9 1 4.5 1 3.3 1 5.3 3.0 6.0 Transport Parameters Boundary Shear Stress Ib/ff) - - 0.48 - Max part size (mm) mobilized at bankfull - - 2.00 - Stream Power W/mZ) - 1 24.50 1- Additional Reach Parameters Rosgen Classification G5c C5 C5 C5 Bankfull Velocity (fps) 7.0 4.0 4.5 4.5 Bankfull Discharge (cfs) 16.0 - 16.0 16.0 Sinuosity 1.06 1.1 - 1.2 1.15 1.14 Water Surface Slope (Channel) (ft/ft)l 0.019 0.015 0.017 0.017 Bankfull Slope (ft/ft)l 0.018 1 0.015 1 0.017 1 0.017 Table 7b. Monitoring Data - Dimensional Morphology Summary (Dimensional Parameters - Cross Sections) Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Cross Section 1 (Riffle) Cross Section 2 (Pool) Cross Section 3 (Pool) Parameters Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Bankfull Width (ft) 8.9 7.7 8.6 7.8 8.4 13.3 5.8 6.1 9.2 9.3 8.7 7.8 Floodprone Width (ft) 32.0 32.0 34.0 34.0 31.0 30.7 31.0 31.0 40.0 40.4 40.0 40.0 Bankfull Mean Depth (ft) 0.6 0.7 0.6 0.6 0.8 0.5 1.1 1.1 1.1 1.2 1.3 1.4 Bankfull Max Depth (ft) 1.2 1.3 1.2 1.3 1.7 1.6 1.8 1.9 2.0 2.1 2.3 2.3 Bankfull Cross Sectional Area (ftZ)5.2 4.9 4.9 4.9 6.7 6.5 6.5 6.5 10.4 11.0 11.0 11.0 Bankfull Width/Depth Ratio 15.9 11.4 15.0 12.4 10.6 27.8 5.1 5.8 8.2 7.9 6.8 5.5 Bankfull Entrenchment Ratio 3.6 4.2 4.0 4.4 3.7 2.3 5.4 5.1 4.3 4.3 4.6 5.1 Bankfull Bank Height Ratio 1.0 1.0 0.9 0.9 <1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 d50 (mm N/a 0.8 1.8 1.7 N/a 0.4 0.3 0.3 N/a 0.4 0.3 0.3 Cross Section 4 (Riffle) Cross Section 5 (Riffle) Cross Section 6 (Pool) Parameter Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Bankfull Width (ft 8.8 8.2 8.2 9.6 8.8 8.0 6.8 6.8 10.4 14.3 25.7 5.8 Floodprone Width (ft 38.0 38.2 38.0 38.0 38.0 44.8 44.0 44.0 44.0 44.5 44.0 44.0 Bankfull Mean Depth (ft 0.6 0.6 0.6 0.5 0.6 0.7 0.7 0.7 0.7 0.4 0.2 1.0 Bankfull Max Depth (ft 1.0 1.0 1.0 0.9 1.0 1.3 1.4 1.4 1.4 1.1 1.0 1.4 Bankfull Cross Sectional Area (ftZ)5.4 5.2 5.2 5.2 5.5 4.7 4.7 4.7 7.7 5.6 5.6 5.6 Bankfull Width/Depth Ratio 14.3 13.0 13.0 17.8 14.3 12.1 9.9 9.9 14.1 37.1 117.0 6.0 Bankfull Entrenchment Ratio 4.3 4.7 4.6 4.0 4.3 5.6 6.4 6.5 4.2 3.1 1.7 7.6 Bankfull Bank Height Ratio 1.0 1.0 0.9 1.0 1.0 1.0 1.1 1.0 1.0 1.0 0.9 1.2 d50 (mm) N/a 0.8 1.8 1.7 N/a 0.8 1.8 1.7 N/a 0.4 0.3 0.3 Cross Section 7 Riffle Cross Section 8 Riffle Parameter Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Base MY1 MY2 MY3 MY4 MY5 MY+ Bankfull Width ft 18.4 18.1 27.2 28.5 N/A N/A 24.8 24.7 Floodprone Width ft 27.0 31.7 64.0 59.1 N/A N/A 135.8 131.0 Bankfull Mean De th ft 0.3 0.3 0.4 0.2 N/A N/A 0.2 0.2 Bankfull Max Depth ft 0.4 0.3 0.2 0.4 N/A N/A 0.8 0.7 Bankfull Cross Sectional Area ft2 4.7 4.7 4.7 4.7 N/A N/A 4.7 4.7 Bankfull Width/Depth Ratio 71.8 69.7 158.9 174.2 N/A N/A 130.6 131.4 Bankfull Entrenchment Ratio 1.5 1.7 2.4 2.1 N/A N/A 5.5 5.3 Bankfull Bank Height Ratio 1.0 1.0 1.1 0.9 N/A N/A 1.0 1.0 IJ d50 mm N/a 0.8 1.8 1.7 N/A 0.8 1.8 1.7 1 1 1 1 1 1 1 1 1 Table 7c. Monitoring Data - Stream Reach Summary Edwards -Johnson Miti ation Project NCDEQ DMS Project ID# 97080 Parameter Baseline MY1 MY2 MY3 MY4 MY5 Reach ID: R1 (Preservation) Min Max Min Max Min Max Min Max Min Max Min Max Profile Riffle Length (ft) - - Riffle Slope (ft/ft) - - Pool Length (ft) - - Pool Max depth (ft) - - Pattern and Profile data will not typically be collected unless visual data, dimensional data or profile data indicate significant deviations from baseline conditions Pool Spacing (ft) - I - Pattern Channel Beltwidth (ft) - - Radius of Curvature (ft) - - Rc:Bankfull width (ft/ft) - - Meander Wavelength (ft) - - Meander Width Ratio - - Additional Reach Parameters Rosgen Classification C5 Sinuosity (ft) 1.21 Water Surface Slope (Channel) (ft/ft) 0.01 Pattern data will not typically be collected unless visual data, dimensional data or profile data BF slope (ft/ft) 0.012 Ri% / Ru% / P% / G% / S% SC%/Sa%/G%/C%/B%/Be% d16/d35/d50/d84/d95 2% of Reach with Eroding Bank Channel Stability or Habitat Metric Biological or Othe Parameter Baseline MY1 MY2 MY3 MY4 MY5 Reach ID: R2 Min Max Min Max Min Max Min Max Min Max Min Max Profile Riffle Length (ft) 12 34 Riffle Slope (ft/ft) 0.017 0.029 Pool Length (ft) 6.2 9.9 Pool Max depth (ft) 1.1 1.6 Pool Spacing (ft) 11.8 36.1 Pattern and Profile data will not typically be collected unless visual data, dimensional data or profile data indicate significant deviations from baseline conditions Pattern Channel Beltwidth (ft) 27 46 Radius of Curvature (ft) 13 29 Rc:Bankfull width (ft/ft) 2.1 3.5 Meander Wavelength (ft) 35 88 Meander Width Ratiol 4.4 7.6 Additional Reach Parameters Rosgen Classification C5 Sinuosity (ft) 1.17 Water Surface Slope (Channel) (ft/ft) 0.012 Pattern data will not typically be collected unless visual data, dimensional data or profile data indicate significant shifts from baseline BF slope (ft/ft) 0.013 Ri% / Ru% / P% / G% / S% 3SC%/ Sa%/ G%/ C%/ B%/ Be% d16/d35/d50/d84/d95 Z% of Reach with Eroding Banks Channel Stability or Habitat Metric Biological or Other, Parameter Baseline MY1 MY2 MY3 MY4 MY5 Reach ID: R3 (upper) Min IMax Min IMax Min Max Min Max Min Max Min Max Profile Riffle Length (ft) 10 30 Riffle Slope (ft/ft) 0.02 0.035 Pool Length (ft) 7 10 Pool Max depth (ft) 1.1 1.6 Pattern and Profile data will not typically be collected unless visual data, dimensional data or profile data indicate significant deviations from baseline conditions Pool Spacing (ft) 11.8 35.5 Pattern Channel Beltwidth (ft) 30 45 Radius of Curvature (ft) 15 25 Re:Bankfull width (ft/ft) 2.5 4.2 Meander Wavelength (ft) 30 44.8 6mmMeander Width Ratiol 5.1 7.6 Additional Reach Parameters Rosgen Classification C5 Sinuosity (ft) 1.16 Water Surface Slope (Channel) (ft/ft) 0.009 Pattern data will not typically be collected unless visual data, dimensional data or profile data indicate significant shifts from baseline BF slope (ft/ft) 0.011 Ri% / Ru% / P% / G% / S% SC% / Sa% / G% / C% / B% / Be% d16/d35/d50/d84/d95 Z% of Reach with Eroding Bank Channel Stability or Habitat Metric Biological or Other Parameter Baseline MY1 MY2 MY3 MY4 MY5 Reach ID: R4 Min Max Min Max Min Max Min Max Min Max Min Max Profile Riffle Length (ft) 12 27 Riffle Slope (ft/ft) 0.015 0.027 Pool Length (ft) 6 8.7 Pool Max depth (ft) 1.1 1.6 Pattern and Profile data will not typically be collected unless visual data, dimensional data or profile data indicate significant deviations from baseline conditions Pool Spacing (ft) 19 41 1 Pattern Channel Beltwidth (ft) 19 31 Radius of Curvature (ft) 10 19 Rc:Bankfull width (ft/ft) 2.1 3.4 Meander Wavelength (ft) 34 77 LL 6om Meander Width Ratiol 3 6 Additional Reach Parameters Rosgen Classification C5 Sinuosity (ft) 1.14 Water Surface Slope (Channel) (ft/ft) 0.017 Pattern data will not typically be collected unless visual data, dimensional data or profile data indicate significant shifts from baseline BF slope (ft/ft) 0.017 Ri% / Ru% / P% / G% / S% SC% / Sa% / G% / C% / B% / Be% d16/d35/d50/d84/d95 2% of Reach with Eroding Bank Channel Stability or Habitat Metric Biological or Other Appendix E — Hydrologic Data FJ Edwards -Johnson Mitigation Project Table 8 Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) Greater than Bankfull (Bkf) or Date of Data Collection Date of Occurrence Method Qgs (Q2*0.66) Stage? Photo/ Notes Measurement Meets Requirment 9/17/2018 9/16-9/17/2018 Observed indicators of bankfull stage (wrack Bkf Photo No lines after storm event 7/26/2019 7/24/2019 Crest Gauge Bkf Photo .25 ft No 8/20/2019 unknown Crest Gauge Bkf Photo .28 ft No 9/6/2019 9/5/2019 Crest Gauge Bkf Photo .25 ft No 9/6/2019 9/5/2019 Observed indicators of bankfull stage (wrack Bkf Photo NA Yes lines) after storm event 2/7/2020 2/6/2020 Crest Gauge Bkf Photo 85 .ft Yes 8/4/2020 8/4/2020 Crest Gauge Bkf Photo 0.5 ft Yes y lk �t, f'aURf 1 ..11] 8/4/2020 Figure 4: Groundwater Gauge Graphs 3 2.5 2 a 1.5 a v 0 E 1 v Edwards -Johnson Flow Gauge - R4 165 days of flow: 1/1/20 - 6/13/20 -0.5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N 0 0 0 0 0 0 0 0 0 0 0 0 0 N 0 0 0 0 N \ N N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N \ N N \ \ � un Gt N tD c-I u1 N rD O M r '-1 n Ln Q1 N tD Ol CO r N rl rl N N M rn Ln %D ID r` n 00 00 (n O 0) e-I � Daily Rainfall —Stream Depth Flow Limit 0 -2 t -4 c -6 L aai -8 v -10 Y -12 o -14 V' -16 -18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Cj rq 0000000000000000000000 N N N N N N N N N N N N N N N N N N N N N N N N N N N N N Q\i 6 rn O rn O r, N N ai w N Q\1 W M O n � q 0000 7 e q 0\0 Ln \ \ e1 N M \ 'I N N n 'I ci N \ \ 14 N M \ e q N N \ '-I ei N \ \ 'i �--4 \ \ \ N \ \ \ M \ \ \ \ \ \ vY \ \ \ W 14 'i ci N N N M M CO a a u1 u1 u1 ID %D lD Daily Rainfall Groundwater Depth Ground Level 12" Below Surface Growing Season 4 3.5 3 a s 2.5 c 2 Z c 1.5 m 1 � 0.5 0 Edwards Johnson Groundwater Gauge 1 4 3.5 3 0.5 0 Edwards Johnson Groundwater Gauge 2 25 191 days, 84.14% of the Growing Season 4 20 3.5 ar 15 3 w c_ v C - « 10 2.5 c_ aai 5 — 2 w a c « 0 'm 1.5 c 0 -5 10 Z11 4V 1 .m Q 0.5 -15 I I I lid -20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N 0 N N 0 N N 0 N 0 N N N N N N N N N N tDD O f n n to -4 N N l\D -4rl I N O\1 CO N N e\-4 N 0000 N rl W O m n e-I M a -I N O e-I N 0000 N N c n Cnn n t\D ^ n n 0`0 0000 0) 0) Daily Rainfall Groundwater Depth -,Ground Level 12" Below Surface Growing Season Edwards Johnson Groundwater Gauge 3 10 4 v 5 s U C L 0 a W 0 W m -5 3 v c 0 0 -10 -15 .. � .� . U 0 0 O O O O O O N O CO 14 e-I CO -4 e-I N R4 days_ 17.on%nf the Growina Seasnn O O CD CD O O 0 N N N N N CD N N CD N N N CD N r- N n rn can n v 0 N M M v n U) n tD O O 0 N CD N N N N N t`D O r\n n 1� rn 00 n 0 Daily Rainfall Groundwater Depth Ground Level 12" Below Surface O O O O O O O N n o a n 00 00 Cn Cn o rl Growing Season I: i m 1 0 0.5 0 Figure 4b - Groundwater Gauge Data Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) MY3 2020 Monitoring Gauge Name Max Consecutive Hydroperiod: Saturation within 12 Inches of Soil Surface (Percent of Growing Season) WETS Station: 317994 - Smithfield Growing Season: 4/6-11/4 (227 days) 2018 2019 2020 2021 2022 2023 2024 Mean Edwards -Johnson Wetland Gauge 1 M 6.17% 6.61% Edwards -Johnson Reference Wetland Gauge 2 M 39.21% 84.14% Edwards -Johnson Reference Wetland Gauge 3 N/A N/A 37.00% Annual Precip Total NA WETS 30th Percentile 42.7 WETS 70th Percentile 51.8 Normal Y _Impoundment X% above or below success criteria N/A Not available - Gauge pulled or yet to be installed by this phase M Malfunction, Data Overwritten or Unretrievable Figure 5: Monthly Rainfall Data Edwards -Johnson Mitigation Project (NCDEQ DMS Project ID# 97080) MY3 2020 30-70 Percentile Rainfall Graph Clayton, NC (CLAY - Central Crops Research Station) 14 12 10 c 8 0 EL u 6 GJ a 4 - 2 - 0 - Jan-20 Feb-20 Mar-20 Apr-20 May-20 Jun-20 Jul-20 Aug-20 Sep-20 Oct-20 Nov-20 Dec-20 Date Observed Rainfall 30th Percentile 70th Percentile *30th and 70th percentile rainfall data collected from weather station CLAY - Central Crops Research Station in Clayton, NC. **Incomplete Month Month 30% 70% Observed Jan-20 2.72 4.62 5.87 Feb-20 2.26 4.09 5.67 Mar-20 3.30 5.03 3.34 Apr-20 2.16 4.20 4.56 May-20 2.65 4.58 3.49 Jun-20 2.41 5.00 6.26 Jul-20 3.88 6.36 5.26 Aug-20 3.17 6.03 12.75 Sep-20 2.93 6.12 7.49 Oct-20 2.08 4.08 2.13 Nov-20 2.05 4.23 6.19 Dec-20 2.57 5.54 **