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HomeMy WebLinkAbout20171291 Ver 1_RES Yadkin 01 UMB Gideon MY2 Report_20221004ID#* 20171291 Select Reviewer: Erin Davis Initial Review Completed Date 10/05/2022 Mitigation Project Submittal - 10/4/2022 Version* 1 Is this a Prospectus, Technical Proposal or a New Site?* Type of Mitigation Project:* Stream Wetlands Buffer Nutrient Offset (Select all that apply) Project Contact Information Contact Name:* Ryan Medric Project Information ID#:* 20171291 Existing ID# Project Type: Project Name: County: DMS • Mitigation Bank Gideon Mitigation Site Surry Document Information O Yes O No Email Address-* rmedric@res.us Version:* 1 Existing Version Mitigation Document Type:* Mitigation Monitoring Report File Upload: RES Yadkin 01 UMB Gideon MY2 Report.pdf 15.28MB Please upload only one PDF of the complete file that needs to be submitted... Signature Print Name:* Ryan Medric Signature: * 91P�� YEAR 2 MONITORING REPORT GIDEON MITIGATION SITE SURRY COUNTY, NORTH CAROLINA USACE Action ID: SAW-2017-01462 | DWR Project #17-1291 v1 RES YADKIN 01 UMBRELLA MITIGATION BANK - Provided by: Bank Sponsor: Environmental Banc & Exchange, LLC An entity of Resource Environmental Solutions 3600 Glenwood Ave, Suite 100 Raleigh, NC 27612 919-209-1056 October 2022 3600 Glenwood Avenue. Suite 100 Raleigh, NC 27612 Corporate Headquarters 6575 West Loop South, Suite 300 Bellaire, TX 77401 Main: 713.520.5400 Table of Contents 1.0 Project Summary ...................................................................................................................................................... 1 1.1 Project Location and Description ....................................................................................................... 1 1.2 Project Goals and Objectives ............................................................................................................... 1 1.3 Project Success Criteria .......................................................................................................................... 2 Stream Restoration Success Criteria ......................................................................................................... 2 Vegetation Success Criteria .......................................................................................................................... 3 1.4 Project Components ................................................................................................................................ 3 1.5 Stream Design/Approach ...................................................................................................................... 3 1.6 Construction and As-Built Conditions .............................................................................................. 5 1.7 Monitoring Performance (MY2) .......................................................................................................... 5 Vegetation .......................................................................................................................................................... 5 Stream Geomorphology ................................................................................................................................ 6 Stream Hydrology ............................................................................................................................................ 6 Wetland Hydrology ......................................................................................................................................... 6 2.0 Methods ...................................................................................................................................................................... 7 3.0 References .................................................................................................................................................................. 7 Appendix A: Background Tables Table 1. Project Mitigation Components Table 2. Project Activity and Reporting History Table 3. Project Contacts Table Table 4. Project Background Information Table Figure 1. Site Location Map Appendix B: Visual Assessment Data Figure 2. Current Conditions Plan View Vegetation Plot Photos Monitoring Device Photos Appendix C: Vegetation Plot Data Table 5. Planted Species Summary Table 6. Vegetation Plot Mitigation Success Summary Table 7. Stem Count Total and Planted by Plot Species Appendix D: Stream Measurement and Geomorphology Data Table 8. Baseline Stream Data Summary Table 9. Cross Section Morphology Data Table Cross Section Overlay Plots Appendix E: Hydrology Table 10. Rainfall Summary Table 11. Documentation of Geomorphically Significant Flow Events Stream Flow Hydrographs Table 12. 2022 Max Hydroperiod Table 13. Summary of Groundwater Monitoring Results Groundwater Hydrographs 1.0 Project Summary 1.1 Project Location and Description The Gideon Project (“Project”) is located within a rural watershed in Surry County, North Carolina approximately 10 miles north of Elkin. Water quality stressors affecting the Project included livestock production, agricultural practices, and lack of riparian buffer. The Project presents stream restoration, enhancement, and preservation, generating 2,962.067 Cool Stream Mitigation Units (SMU). The Project’s total easement area is 11.23 acres within the overall drainage area of 3,225 acres. The Project is between two separate portions of the Division of Mitigation Services (DMS) Little Sebastian Site. While each site could be developed independently of the other, the combined easements will result in a much larger contiguous protected corridor and high-quality aquatic habitat. The Little Sebastian Site has a total easement area that is approximately 25.90 acres and presents 8,068 LF of stream restoration, enhancement, and preservation. Therefore, a total of 37.13 acres and 12,850 LF of stream will be protected in perpetuity when combining the totals on Little Sebastian and Gideon. Grazing livestock have historically had access to most stream reaches within the Project. The lack of riparian buffer vegetation, deep-rooted vegetation, and unstable channel characteristics have contributed to the degradation of stream banks throughout the Project area. The stream design approach for the Project was to combine the analog method of natural channel design with analytical methods to evaluate stream flows and hydraulic performance of the channel and floodplain. The analog method involved the use of a reference reach, or “template” stream, adjacent to, nearby, or previously in the same location as the design reach. The template parameters of the analog reach were replicated to create the features of the design reach. The analog approach is useful when watershed and boundary conditions are similar between the design and analog reaches (Skidmore et al., 2001). Hydraulic geometry was developed using analytical methods to identify the design discharge. The Project has been constructed and planted and will be monitored on a regular basis throughout the seven-year post-construction monitoring period, or until performance standards are met. The Project will be transferred to Unique Places to Save (UP2S). This party shall serve as conservation easement holder and long-term steward for the property and will conduct periodic inspection of the site to ensure that restrictions required in the conservation easement are upheld. Funding will be supplied by the responsible party on a yearly basis until such time an endowment is established. 1.2 Project Goals and Objectives Through the comprehensive analysis of the Project’s maximum functional uplift using the Stream Functions Pyramid Framework, specific, attainable goals and objectives will be realized by the Project. These goals clearly address the degraded water quality and nutrient input from farming that were identified as major watershed stressors in the 2009 Upper Yadkin Pee-Dee River RBRP. These goals and objectives reflect those stated in the Gideon Project Final Mitigation Plan. The Project goals are: Improve water transport from watershed to the channel in a non-erosive manner in a stable channel; Improve flood flow attenuation on site and downstream by allowing for overbanks flows and connection to the active floodplain; Gideon Mitigation Site 1 Year 2 Monitoring Report Surry County, NC October 2022 Improve instream habitat; Restore and enhance native floodplain vegetation; and Indirectly support the goals of the 2009 Upper Yadkin Pee-Dee RBRP to improve water quality and to reduce sediment and nutrient loads. The Project goals were addressed through the following project objectives: Designed and reconstructed stream channels sized to convey bankfull flows that maintain a stable dimension, profile, and planform based on modeling, watershed conditions, and reference reach conditions; Permanently excluded livestock from stream channels and their associated buffers; Added in-stream structures and bank stabilization measures to protect restored and enhanced streams; Installed habitat features such as brush toes, constructed riffles, woody materials, and pools of varying depths to restored and enhanced streams; Reduced bank height ratios and increased entrenchment ratios to reference reach conditions; Increased forested riparian buffers to at least 30 feet on both sides of the channel along the Project reaches with a hardwood riparian plant community; Treated exotic invasive species; and Established a permanent conservation easement on the Project. Functional uplift, benefits, and improvements within the Project area, as based on the Function Based Framework, are outlined in the Final Mitigation Plan. 1.3 Project Success Criteria The success criteria for the Project follows the 2016 USACE Wilmington District Stream and Wetland Compensatory Mitigation Update, the Gideon Final Mitigation Plan, and subsequent agency guidance. Cross section and vegetation plot monitoring takes place in Years 0, 1, 2, 3, 5, and 7. Stream hydrology and visual monitoring takes place annually. Specific success criteria components are presented below. Stream Restoration Success Criteria Four bankfull flow events must be documented within the seven-year monitoring period. The bankfull events must occur in separate years. Otherwise, the stream monitoring will continue until four bankfull events have been documented in separate years. There should be little change in as-built cross sections. If changes do take place, they should be evaluated to determine if they represent a movement toward a less stable condition (for example down-cutting or erosion) or are minor changes that represent an increase in stability (for example settling, vegetative changes, deposition along the banks, or 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. For C/E channels, bank height ratio shall not exceed 1.2, and the entrenchment ratio shall be no less than 2.2 within restored reaches. For B channels, bank height ratio shall not exceed 1.2, and the entrenchment ratio shall be no less than 1.4 within restored reaches. Channel stability should be demonstrated through a minimum of four bankfull events documented in the seven-year monitoring period. Gideon Mitigation Site 2 Year 2 Monitoring Report Surry County, NC October 2022 Digital images are used to subjectively evaluate channel aggradation or degradation, bank erosion, success of riparian vegetation, and effectiveness of erosion control measures. Longitudinal images should not indicate the absence of developing bars within the channel or an excessive increase in channel depth. Lateral images should not indicate excessive erosion or continuing degradation of the banks over time. A series of images over time should indicate successional maturation of riparian vegetation. Stream restoration reaches will be monitored to document intermittent or seasonal surface flow. This will be accomplished through direct observation and the use of stream gauge transducers with data loggers. Reaches must demonstrate a minimum of 30 consecutive days of flow. Vegetation Success Criteria Specific and measurable success criteria for plant density within the riparian buffers on the Project will follow IRT Guidance. The interim measures of vegetative success for the Project will be the survival of at least 320 planted three-year old trees per acre at the end of Year 3, five-year old trees at six feet in height at the end of Year 5, and the final vegetative success criteria will be 210 trees per acre with an average height of eight feet at the end of Year 7. Volunteer trees will be counted, identified to species, and included in the yearly monitoring reports, but will not be counted towards the success criteria of total planted stems. Moreover, any single species can only account for up to 50 percent of the required number of stems within any vegetation plot. Any stems in excess of 50 percent will be shown in the monitoring table but will not be used to demonstrate success. 1.4 Project Components The Project area is comprised of a single 11.23-acre easement location along Mill Creek and three unnamed tributaries, totaling 4,782 LF, which eventually drain into the Yadkin River. Through stream restoration, enhancement, and preservation, the Project presents 4,782 LF of proposed stream, generating 2,962.067 Cool SMUs. The stream mitigation components are summarized below. Mitigation credits presented below are based upon the Approved Mitigation Plan. Mitigation Approach Linear Feet RatioBase Cool SMU Restoration 2,283 1 2,283.000 Enhancement I 493 1.5328.667 Enhancement III1,498 5 299.600 Preservation 508 10 50.800 Total 4,782 2,962.067 1.5 Stream Design/Approach The stream component of the Project included priority I stream restoration, enhancement I, enhancement III, and preservation. Stream restoration incorporated the design of a single-thread meandering channel, with parameters based on data taken from reference sites, published empirical relationships, regional curves developed from existing project streams, and NC Regional Curves. Analytical design techniques were also a crucial element of the project and were used to determine the design discharge and to verify design stability. Gideon Mitigation Site 3 Year 2 Monitoring Report Surry County, NC October 2022 The following stream treatment was performed on the Project reach: Reach JN4-A An enhancement III approach was used for the reach to address eroded banks and channel entrenchment. Enhancement activities included: - Livestock exclusion; and - Riparian planting. Reach JN4-B An enhancement I approach was used for the reach to address eroded banks and channel entrenchment. Enhancement activities included: - Removal of pipe in channel and fixing of current culvert; - Installing log and rock structures to provide grade control and habitat; - Establishing a riffle-pool sequence throughout the reach; - Installing brush toe protection on meander bends; - Livestock exclusion; and - Riparian planting. Reach JN5 An enhancement I approach was used for the reach to address eroded banks and channel entrenchment. Enhancement activities included: - Installing log and rock structures to provide grade control and habitat; - Establishing a riffle-pool sequence throughout the reach; - Installing brush toe protection on meander bends; - Livestock exclusion; and - Riparian planting. Reach JN6-A A preservation approach was used for the reach to address eroded banks and channel entrenchment. Preservation activities included: - Livestock exclusion; and - Riparian planting. Reach JN6-B An enhancement III approach was used for the reach to address eroded banks and channel entrenchment. Enhancement activities included: - Livestock exclusion; and - Riparian planting. Reach JN6-C An offline priority I restoration approach was used for the reach to address eroded banks and channel entrenchment. Restoration activities included: - Re-grading a new single thread channel in the existing floodplain; - Installing log and rock structures to provide grade control and habitat; - Establishing a riffle-pool sequence throughout the reach; - Installing brush toe protection on meander bends; - Filling the existing channel; - Livestock exclusion; and Gideon Mitigation Site 4 Year 2 Monitoring Report Surry County, NC October 2022 - Riparian planting. Reach MC2-A An offline priority I restoration approach was used for the reach to address eroded banks and channel entrenchment. Restoration activities included: - Re-grading a new single thread channel in the existing floodplain; - Installing log and rock structures to provide grade control and habitat; - Establishing a riffle-pool sequence throughout the reach; - Installing brush toe protection on meander bends; - Filling the existing channel; - Livestock exclusion; and - Riparian planting. Reach MC2-B An enhancement III approach was used for the reach to address eroded banks and channel entrenchment. Enhancement activities included: - Livestock exclusion; and - Riparian planting. 1.6 Construction and As-Built Conditions Stream construction was completed in February 2021 and planting was completed in March 2021. The Gideon Project was built to design plans and guidelines with no significant changes during construction. The as-built survey and record drawings are included in Appendix E. Planting plan changes included replacing blackgum (Nyssa sylvatica) and elderberry (Sambucus canadensis) with sugarberry (Celtis laevigata) and buttonbush (Cephalanthus occidentalis). These changes were based on bare root availability. A planted species summary is included in Appendix C. 1.7 Monitoring Performance (MY2) The Gideon Year 2 monitoring activities were performed in July and September 2022. All year two monitoring data is present below and in the appendices. The Project is on track to meeting vegetation, stream, and wetland interim success criteria. Vegetation Monitoring of four fixed vegetation plots was completed in September 2022. Vegetation data are in Appendix C, associated photos are in Appendix B, and plot locations are in Appendix B. MY2 monitoring data indicates that all plots are exceeding the interim success criteria of 320 planted stems per acre. Planted stem densities ranged from 405 to 1,376 planted stems per acre with a mean of 971 planted stems per acre across all plots. A total of 11 planted species were documented within the plots. Volunteer species were noted in all plots, bringing the total species count throughout the plots to 15, and are expected to establish further in upcoming years. The average stem height in the plots was 3.4 feet. Visual assessment of vegetation outside of the monitoring plots indicates that the herbaceous vegetation is becoming well established throughout the project. One small bare area along the banks of MC2-A where stream maintenance was completed in 2021 will be re-seeded in the dormant season. During MY1, it was Gideon Mitigation Site 5 Year 2 Monitoring Report Surry County, NC October 2022 noted that the stream banks along JN6-C displayed low livestake vigor; however, during MY2, healthy livestakes and native recruits, mainly tag alder (Alnus serrulata) and black willow (Salix nigra) were observed along this reach and therefore supplemental livestaking will not be needed. This specific area will be monitored in coming years to determine whether or not additional planting will be necessary. A few small, sparse areas of Chinese privet were treated along JN6-C and JN4-B in December 2021; no additional areas of invasive species were observed during MY2 monitoring. Stream Geomorphology Geomorphology data for MY2 was collected in July 2022. Summary tables and cross section plots are in Appendix D. Overall, the Year 2 cross sections and profile relatively match the proposed design. The MY2 conditions show that shear stress and velocities have been reduced for the restoration reaches. A comment was made regarding the increased bank height ratio on cross section nine (1.3) compared to as-built (1.0); during MY2 the bank height ratio for this cross section was back down to 0.9. This could have been due to a more appropriate top of bank being chosen in the field during monitoring, or it could have been natural channel adjustments post-construction. These reaches were designed as coarse gravel to cobble bed channel and remain classified as a coarse gravel to cobble bed channel post-construction. Visual assessment of the stream channel was performed to document signs of instability, such as eroding banks, structural instability, or excessive sedimentation. A few areas of bank erosion along MC2-A were repaired in November 2021; however, headcuts along the top of banks near cross section three and four were observed during MY2, most likely a result of overland flow.These areas will be amended using haybales, coir matting, and will be re-seeded in the dormant season prior to MY3. Documentation of the problem area can be found in Appendix B. The channel is transporting sediment as designed and will continue to be monitored for aggradation and degradation. Stream Hydrology Two stage recorders (on MC2-A and JN6-C) and one flow gauge (on JN6-B) were installed in March 2021 and document bankfull events and flow days, respectively. Both stage recorders documented two bankfull events each during MY2; the highest event on JN6-C was 0.377 feet above the top of bank and the highest event on MC2-A was 0.125 feet above the top of bank. The flow gauge documented one flow event, lasting 262 days. All recorded streams are on track to pass hydrology metrics. Stream hydrology data is included in Appendix E. Gauge locations can be found on Figure 2 and photos are in Appendix B. Wetland Hydrology Three groundwater wells with automatic recording pressure transducers were installed in March 2021. The goal of the groundwater wells is to track the hydrology of the jurisdictional wetlands on site post- construction. There is no hydroperiod success criteria for these groundwater wells. During MY2 groundwater th well 1 (GW1) had a 5% hydroperiod; however, the well itself snapped in half sometime between July 12 th and September 20, 2022, and will need to be reinstalled during a follow up visit; MY2 and MY3 hydrology data will reflect this malfunction. Groundwater well 2 (GW2) had a 23% hydroperiod, and groundwater well 3 (GW3) had a 39% hydroperiod. Wetland hydrology data can be found in Appendix E and gauge locations can be found on Figure 2. Gideon Mitigation Site 6 Year 2 Monitoring Report Surry County, NC October 2022 2.0 Methods Stream cross section monitoring was conducted using a Topcon GTS-312 Total Station. Three-dimensional coordinates associated with cross-section data were collected in the field (NAD83 State Plane feet FIPS 3200). Morphological data were collected at 10 cross-sections. Survey data were imported into CAD, ArcGIS®, and Microsoft Excel® for data processing and analysis. The stage recorders include an automatic pressure transducer placed in PVC casing in a pool. The elevation of the bed and top of bank at each stage recorder are used to detect bankfull events. Vegetation success is being monitored at four fixed monitoring plots. Vegetation plot monitoring follows the CVS-EEP Level 2 Protocol for Recording Vegetation, version 4.2 (Lee et al. 2008) and includes analysis of species composition and density of planted species. Data are processed using the CVS data entry tool. In the field, the four corners of each plot were permanently marked with PVC at the origin and metal conduit at the other corners. Photos of each plot are to be taken from the origin each monitoring year. Wetland hydrology is monitored to track the hydrology of the jurisdictional wetlands on site post- construction. This is accomplished with three automatic pressure transducer gauges (located in groundwater wells) that record daily groundwater levels. One automatic pressure transducer is installed above ground for use as a barometric reference. Gauges are downloaded quarterly and wetland hydroperiods are calculated during the growing season. Gauge installation followed current regulatory guidance. Visual observations of primary and secondary wetland hydrology indicators are also recorded during quarterly site visits. 3.0 References Griffith, G.E., J.M.Omernik, J.A. Comstock, M.P. Schafale, W.H.McNab, D.R.Lenat, T.F.MacPherson, J.B. Glover, and V.B. Shelburne. (2002). Ecoregions of North Carolina and South Carolina, (color Poster with map, descriptive text, summary tables, and photographs): Reston, Virginia, U.S. Geological Survey (map scale 1:1,500,000). Lee Michael T., Peet Robert K., Roberts Steven D., and Wentworth Thomas R., 2008. CVS-EEP Protocol for Recording Vegetation Level. Version 4.2 Peet, R.K., Wentworth, T.S., and White, P.S. (1998), A flexible, multipurpose method for recording vegetation composition and structure. Castanea 63:262-274 Resource Environmental Solutions (2019). Gideon Final Mitigation Plan. Schafale, M.P. 2012. Guide to the Natural Communities of North Carolina, Fourth Approximation. North Carolina Natural Heritage Program, Division of Parks and Recreation, NCDENR, Raleigh, NC. USACE. (2016). Wilmington District Stream and Wetland Compensatory Mitigation Update. NC: Interagency Review Team (IRT). Gideon Mitigation Site 7 Year 2 Monitoring Report Surry County, NC October 2022 Table 2. Project Activity and Reporting History Gideon Mitigation Project Elapsed Time Since grading complete:1 Yr., 6 Mo. Elapsed Time Since planting complete:1 Yr., 6 Mo. 1 Number of reporting Years: 2 Data Collection Completion or Activity or DeliverableCompleteDelivery Restoration PlanNAJun-19 Final Design – Construction PlansNASep-20 Stream ConstructionNAMar-21 Site PlantingNAMar-21 As-built (Year 0 Monitoring – baseline)Jan-21Jun-21 Year 1 MonitoringNov-21Jan-22 Stream Bank Repairs (MC2-A)-Nov-21 Invasive Treatment-Dec-21 XS: July-22 Year 2 MonitoringOct-22 Veg: Sept-22 Year 3 Monitoring Year 4 Monitoring Year 5 Monitoring Year 6 Monitoring Year 7 Monitoring 1 = The number of reports or data points produced excluding the baseline Table 3. Project Contacts Table Gideon Mitigation Project RES / 3600 Glenwood Ave., Suite 100, Raleigh, NC 27612 Designer Primary project design POCA. Frasier Mullen, PE KBS Earthwork Inc. / 5616 Coble Church Rd., Julian, NC Construction Contractor 27283 Construction contractor POCKory Strader Ascension Land Surveying, PC /116 Williams Road, Survey Contractor Mocksville, NC 27028 Survey contractor POCChris Cole, PLS Shenandoah Habitats Planting Contractor Planting contractor POCDavid Coleman RES / 3600 Glenwood Ave, Suite 100, Raleigh, NC 27612 Monitoring Performers Project Manager POCRyan Medric (703) 424-6313 Monitoring POCEmily Ulman (910) 274-8231 Table 4. Project Background Information Project Name Gideon County Surry Project Area (acres) 11.23 Project Coordinates (latitude and longitude) 36.39659. -80.85833 Planted Acreage (Acres of Woody Stems Planted) 4.26 Project Watershed Summary Information Physiographic Province 45e - Northern Inner Piedmont River Basin Yadkin USGS Hydrologic Unit 14-digit USGS Hydrologic Unit 8-digit 03040101080020 03040101 DWR Sub-basin 03-04-01 Project Drainage Area (Acres and Square Miles) 3,191 Project Drainage Area Percentage of Impervious Area <1% Reach Summary Information ParametersJN4-AJN4-B JN5 Length of reach (linear feet) 244 213249 Drainage area (Acres) 37 39 198 Perennial, Intermittent, Ephemeral PP P Little Sebastian Little Sebastian Mitigation Site Mitigation Site Legend Easement Little Sebastian Mitigation Site Service Area - 03040101 Gideon Mitigation Site TLW - 03040101080020 Date: 5/31/ Figure 1 - Map Drawn by: © Gideon Mitigation Site Checked by: BPB 05001,000 Surry County, North Carolina 1 inch = 1,000 feet Feet seicepS evisavnI dxm.2202 2YM VPCC noediG\\2YM\\ecnanetniaMgnirotinoM_6\\DXM\\noediG_051001\\stcejorP\\sigtne\\sigseR\\:R :htaP tnemucoD )) 9/20/20229/20/2022 ( ( Vegetation Plot 2 Vegetation Plot 4 )) 9/20/20229/20/2022 Vegetation Monitoring Plot Photos Vegetation Plot 1 (Vegetation Plot 3 ( Fixed 2 MY Gideon C - Stage Recorder JN6 ) A - B - 7/12/2022 ( s Photo Flow Gauge JN6 Stage Recorder MC2 Monitoring Device Gideon 2 Groundwater Well ) 3 7/12/2022 Groundwater Well 1Groundwater Well Gideon Monitoring Device Photos ( C (Looking Downstream) - Crossing on JN6 ) (Looking Upstream) C (Looking Upstream) A -- 9/20/2022 ( MC2 Crossing on JN6 Crossing on Gideon Crossing Photos A (right bank near XS 3&4) (7/12/2022) - MC2 ) 2 /202 12 / 7 ( A (left bank near XS 3&4) - Erosion MC2 Gideon Bank Appendix C. Vegetation Plot Data Table 5. Planted Species Summary Common NameScientific NameMit Plan %As-Built %Total Stems Planted Willow Oak Quercus phellos 1515700 River Birch Betula nigra 1515700 Water Oak Quercus nigra 1514700 Northern Red Oak Quercus rubra 1010500 Yellow Poplar Liriodendron tulipifera 1010500 Sycamore Platanus occidentalis 1010500 Sugarberry Celtis laevigata 010500 Buttonbush Cephalanthus occidentalis 06300 Persimmon Diospyros virginiana 56300 Green Ash Fraxinus pennsylvanica 104200 Elderberry Sambucus canadensis 500 Nyssa sylvatica Blackgum 500 Total 4,900 Planted Area4.26 As-built Planted Stems/Acre1,150 Table 6. Vegetation Plot Mitigation Success Summary Averaged Success Planted Volunteer Total Planted Plot #Criteria Stems/AcreStems/AcreStems/AcreStem Height Met? (ft) 1 10936881781Yes5.0 2 1376811457Yes3.0 3 10122431255Yes2.8 4 405202607Yes2.3 Project Avg9713041275Yes3.4 Table 10. 2022 Rainfall Summary Normal Limits Raven Knob Station MonthAverage Precipitation 30 Percent70 Percent January3.982.774.742.67 February3.302.203.955.04 March4.072.924.803.82 April4.192.835.012.31 May 4.593.065.505.91 June4.763.245.691.76 July 5.323.786.3011.22 August4.973.515.904.76 September4.383.195.151.48 October3.562.294.29 November3.361.994.08 December4.032.804.79--- Total50.5134.5860.2038.97 Above Normal LimitsBelow Normal LimitsBetween Normal Limits Note: Raven Knob CRONOS Station is approximately 6 miles north of the site Table 11. Documentation of Geomorphically Significant Flow Events Number of Bankfull Maximum Bankfull Height YearDate of Maximum Bankfull Event Events(ft) Stage Recorder JN6-C - MY1 20210- 7/9/2022 MY2 202221.84 Stage Recorder MC2-A - MY1 20210- 4/5/2022 MY2 202220.13 Maximum Consecutive Maximum Cummlative Maximum Consecutive YearNumber of Flow Events Flow DaysFlow DaysFlow Date Range Flow Gauge JN6-B MY1 202112442443/19/2021 - 11/18/2021 MY2 202212622621/1/2022 - 9/20/2022 Rainfall (in) Water Depth (ft) Table 12. 2022 Max Hydroperiod (Growing Season 3-Apr through 30-Oct, 210 days) ConsecutiveCumulative Well IDOccurrences Hydroperiod Hydroperiod DaysDays (%)(%) GW1*105411911 GW2 4823154734 GW3 39191326311 *Groundwater well snapped sometime between 7/12/22 and 9/20/22; therefore, data is skewed slightly Table 13. Gideon Hydroperiod (%) Well ID Year 1 (2021) Year 2 (2022)Year 3 (2023)Year 4 (2024)Year 5 (2025)Year 6 (2026)Year 7 (2027) GW1 55 GW2 9723 GW3 4019 Precipitation (inches) Groundwater Elevation (inches) Precipitation (inches) Groundwater Elevation (inches) Precipitation (inches) Groundwater Elevation (inches)