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HomeMy WebLinkAbout20170537 Ver 2_BPDP - DWR Comments_20170728Bank Parcel Development Plan Hannah Bridge Mitigation Site Johnston County, North Carolina Neuse River Basin HUC 03020201 Prepared By: or^,s Bank Sponsor: EBX-Neuse I, LLC, 302 Jefferson Street, Suite 110 Raleigh, NC 27605 919-829-9909 May 2017 Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site i May 2017 Table of Contents 1 INTRODUCTION....................................................................................................................... 43 1.1 Parcel Location......................................................................................................................43 1.2 Parcel Overview.................................................................................................................... 43 2 PROJECT AREA — EXISTING CONDIf IONS ........................................................................54 2.1 Physiography......................................................................................................................... 54 2.2 Soils.......................................................................................................................................54 2.3 Vegetation............................................................................................................................. 76 2.4 Wetlands................................................................................................................................76 2.5 Threatened and Endangered Species...................................................................................... 8-7 2.6 Environmental and Cultural Constraints.................................................................................98 2.7 FEMA Floodplain/Floodway Mapping...................................................................................98 3 RESTORATION PLAN..............................................................................................................98 3.1 Riparian Restoration Activities.............................................................................................. 98 3.2 Planting Plan........................................................................................................................101 3.3 Easement Boundaries and Fencing....................................................................................... 109 4 MONITORING AND MAINTENANCE PLAN......................................................................101 4.1 Monitoring Protocol and Success Criteria............................................................................ 109 4.2 Adaptive Management Plan............................................................................................... 1110 ' 4.3 Long Term Management Plan............................................................................................ 1110 r� 5 FINANCIAL ASSURANCE....................................................................................................1110 6 MITIGATION POTENTIAL.................................................................................................1211 7 REFERENCES........................................................................................................................1441 APPENDIX Appendix A— Supporting Figures Figure 1. Project Vicinity Map t Figure 2. USGS Topographic Map i ure 3. National Wetlands Inventory Map Figure 4. Historical Aerial Photography Figure 5. Soils Map Figure 6. FEMA Map ' Figure 7. Existing Conditions Figure G FEMA Map � I figure 8 (a). Conceptual Design Plan for Mitigation Site Figure 8 (b). Conceptual Design Plan for Wetland Restoration/Enhancement Only Figure 9. (a). Credit Determination Map for Mitigation Site Figure 9 (,b). Credit Determination Map for Riparian Welland Restoration/Enhancement OnlyT_ J' Figure 10. Service Area Map Figure 11. Proposed locations of Plots for Buffer, Nutrient Offset and Riparian Wetlands. Figure Q Conceptual Design Plan Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site ii May 2017 Commented [MK1]: Shows streams in "blue" that should be "ditches" per the stream determination letter by DWR i f Commented [MK2]: Shows streams in "blue" that should be "ditches" per the stream determination letter by DWR Commented [MK3]: *do not use this table to show credits *clarify the Legend a little: add the widths beside each mitigation type (this may be the table you need to include with your Stream & Wetland Mit Plantoo. *Ditch entering between HBO and HB4 isn't labeled "ditch" or "stream". Please label "ditch" *are ditches that are labeled black on map going to remain or be removed/ •TH3 —this feature was determined to be intermittent at the DWR flag, but RES is showing it as a stream all the way to the easement break. And, itis straight, just as it was in the field. If RES isn't performing any stream restomtion/enhancement on the ditch, then RES needs to modify their credit type to be just nutrient offset and not buffer restoration. Commented [ MK4]: Just use this map to show credit determinations (move table from Figure 8 to this one). *add credit generation table to reflect comments on table in section 6.0 *it is difficult to determine in Figure 8 in some areas, which feature the nutrient and buffer credits are being generated off of. Please add a line splitting the 0- 100' from the 101-200' so that it's easy to decipher where these widths are and what features the credits are being generated off of. *The USACE needs to know if RES is seeking other types of mitigation credits beyond the 50' required for stream, if they intend to use wider widths to generate more stream credit. If RES intends to do this, they need to inform the USACE/IRT. Commented [MK5]: I ask for this, because only the areas that have performance standards by the USACE can be suitable for removing from the ledgers down the road. Therefore, since Wetland Preservation doesn't have performance standards, no wetland credits generated from that acreage can be converted into buffer credit and transferred to the buffer ledger to comply with the USACE's current policy on this. I need RES to show where the Wetland Preservation Area (with acreage) are and where the Restomtion/Enhancement Areas are (with acreage) Leave out the buffer/nutrient offset on this map you prepare. Only provide wetland areas that fall within the 0- 100' and 101-200'. Appendix B- Correspondence Appendix C- Conservation Easement and Plat Appendix E — Existing Conditions Photos (Month XX, 017 — Commented [MK6]: Submit current photos of ag Selds and streams at tune of BPDP final submittal, Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site iii May 2017 1 tNTRODUCTIOIV Commented [MK7]: Provide the SAW #for the Stream and Wetland Bank EBX—Neuse I, LLC (EBX), an entity of Resource Environmental Solutions (RES), is pleased to provide this Bank Parcel Development Plan (BPDP) for the Hannah Bridge Riparian Buffer and Nutrient Offset Mitigation Bank ("Parcel"). This Parcel is designed to provide riparian buffer and nutrient offset mitigation credits for unavoidable impacts due to development within the Neuse River Basin, United States Geological Survey (`USGS') 8 -digit Hydrologic Unit Code (HUC — 03020201). In addition, it will also provide nutrient offset credits in the 03020201 HUC, excluding the Falls Lake Watershed, for existing and proposed development requiring such mitigation. This BPDP is in accordance with the Consolidated Buffer Mitigation Rule 15A NCAC 02B .0295 and 15A NCAC 0213.0240 as well as the Hannah Bridge Mitigation Banking Instrument for Riparian Buffer Mjtigation and Nutrient Offset Credits, made and entered into by EBX-Neuse I, LLC acting as the Bank Sponsor (Sponsor), and the North Carolina Department of Environmental Quality (NCDEQ) on . Supporting figures can be found in Appendix A. The BPDP has also been designed in concurrence with the Hannah Bridge Stream and Wetland Mitigation Bank. The mitigation plan for the Hannah Bridge Stream and Wetland Mitigation Bank has been submitted and approved by the Interagency Review Team. 1.1 Parcel Location The Parcel is located in Johnston County approximately five miles south of the town of Four Oaks, NC (Figure 1). The Parcel is located within Neuse River Basin USGS 14 -digit HUC 03020201150020 and North Carolina Division of Water Resources (NC DWR) Subbasin Number 03-04-04. To access the Parcel from the town of Four Oaks, travel South on NC Hwy 96 and turn left on Green Pasture Road. The coordinates of the site are 35.380025°N and -78.417046 °W. 1.2 Parcel Overview I The Parcel easement totals 46.2 acres and includes unnamed tributaries, and stormwater runoff from adjacent pastures that flow directly to Hannah Creek. The drainage area of the Parcel is 1.39 mil. The Parcel is located in an area dominated by agriculture, livestock, and residential land use. A majority of the Parcel is utilized for livestock pasture. Additional land use practices including the maintenance and removal of riparian vegetation and the relocation and the dredging and straightening of onsite streams has resulted in degraded water quality and unstable channel characteristics. The Hannah Bridge Mitigation Site is proposed to provide stream restoration and enhancement on approximately 8,524 linear feet of streams and wetland restoration, enhancement, and preservation on 16.7 acres of wetlands within the conservation easement through a separate mitigation banking instrument. Figure 7 shows the existing stream channel and wetland boundary and Figure 8 shows the proposed stream and wetland mitigation areas for the stream and wetland mitigation bank. Restoration of the riparian buffer is anticipated to result in immediate water quality benefits within the vicinity of the Parcel through the removal of livestock access to Parcel streams. The riparian restoration activities within the Parcel will also result in improved water quality within the downstream watershed. Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 4 May 2017 Commented [MK8]: *Clarify here, if anything proposed beyond 50' is intended to be restored for anything but buffer & nutrient credit. (stream?? ) *add some clarity so that when one reads this section, they get a feeling for what all this mitigation site will be used for. How many acres buffer restoration dedicated to Buffer Only? How many acres dedicated to Buffer Enhancement & Preservation? How many acres dedicated to Nutrient Offset? How many acres of buffer restoration dedicated to buffer are also viable to generate NOC if ever requested? How many acres of Wetland Mitigation total? How many acres of proposed wetland mitigation TOTAL How many acres of wetland credit would be viable to be transferred into buffer down the road if requested? This needs to be discussed with the IRT before RES proposes any wetland acreas for this plan. How much linear feet of stream is being mitigated? (don't care about the credit amounts) The project area is comprised of two separate easement locations along multiple drainage features that flow into Hannah Creek. The northern easement area captures a single tributary to Hannah Creek and a portion of its headwaters. The southern easement area is separated from the northern area by an active agricultural field, and is divided into three different areas due to a utility crossing and a culvert crossing. The northern portion of the project contains Reach TH3, while the southern portion is comprised of Reaches HBI, 11132, 11133, HB4, HFI, and 11172. Stream determinations have been verified by NCDWR staff during a site visit on April 8, 2015 (Appendix B). The Parcel is being proposed to restore, enhance, and preserve stream systems with their adjacent riparian buffers and their functions and values to compensate in appropriate circumstances for unavoidable stream and riparian buffer impacts and nutrient load reduction requirements. The buffer mitigation plan proposed on this Bank is being submitted for review under the Consolidated Buffer Mitigation Rule 15A NCAC 02B .0295, as well as conditions specified in the Hannah Bridge Riparian Buffer and Nutrient Offset Mitigation Banking Instrument. 2 PROJECT AREA — EXISTING CONDITIONS 2.1 Physiography The Parcel is in the Coastal Plain Physiographic Province. Soils in the Coastal Plain region formed in sediment deposits several millions of years ago by the ocean and streams; however, the floodplains along the Neuse River consist of fairly recent deposits. These deposits are not as weathered as the sediments in the Coastal Plain region. The site is located on the Hannah Creek floodplain and has a gently rolling topography (Figure 2). Five unnamed tributaries on The Hannah Bridge Bank Parcel as well as overland flow of stormwater drain into Hannah Creek just downstream of the Parcel. Natural drainage patterns throughout the watershed have been altered by cultivation and dredging of the channels. Within the proposed mitigation area, the channels drain surface water and groundwater from the surrounding agricultural practices. 2.2 Soils The Site is located in the Coastal Plain Physiographic Province. The soils within the Coastal Plain region of Johnston County formed in sediments deposited several million years ago by the oceans and streams. The flood plains along the Neuse River consist of relatively recent deposits of sediments that are not as highly weathered as sediments in the Coastal Plain Region. Much of the county is well drained; however, several areas are poorly drained. The Johnston County Soil Survey shows several mapping units across the site. Map units include seven soil series (Figure 5). The soil series found on the site are described below and summarized in Table 1. Goldsboro sandy loam. This is a very deep, moderately drained soil found on uplands of the Coastal Plain. Soils formed in fluviomarine deposits, and generally occur on slopes between 0-10%. Runoff is negligible to medium and permeability is moderate. Major uses are cropland. Goldsboro sandy loams occur along the stream near the middle of the proposed conservation easement. Lynchburg sandy loam. This is a very deep, somewhat poorly drained soil that occurs on terraces and flats of the Coastal Plain. They formed in fluviomarine deposits, and generally occur on slopes between Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 5 May 2017 0-5%. Runoff is negligible and permeability is moderate. Major uses are cropland, pasture, and forest. Lynchburg sandy loam occurs along the stream near the middle of the easement almost opposite of the Goldsboro sandy loam. Bibb sandy loam. This is a very deep, poorly drained soil found on flood plains of the Coastal Plain. Slopes are generally less than 2%. Soils formed in stratified sandy alluvium and have very slow runoff with moderate permeability. The water table is generally within 8 inches of the surface for 6 to 11 months of the year. Bibb sandy loams occurs along the majority of the easement around the stream. Gilead sandy loam. This is a very deep, moderate to well drained soil that occurs on ridges and terraces of the Coastal Plain. They formed in clayey marine deposits, and generally occur on slopes between 2-8 %. Runoff is medium and permeability is moderate. Major uses are cropland. Gilead sandy loam occurs within the South most wetland and southern end of the tributary inside of the proposed conservation easement. Rains sandy loam. This is a very deep, poorly drained soil that occurs on crests of the Coastal Plain. They formed in Loamy and sandy marine deposits, and generally occur on slopes between 2-6 %. Runoff is low and permeability is moderate. Major uses are cropland. Rains sandy loam occurs within the North most wetland inside of the proposed conservation easement. Uchee loamy course sand. This is a very deep, well -drained soil that occurs on flats and depressions of the Coastal Plain. They formed in fluviomarine deposits, and generally occur on slopes between 0-2 %. Runoff is negligible and permeability is moderate. Major uses are forest and cropland. Uchee loamy sand occurs within the south wetland inside of the proposed conservation easement. Altavista Sne sandy loam. This is a very deep, moderately to well -drained soil that occurs on stream terraces of the Coastal Plain. They formed in old loamy alluvium derived from igneous and metamorphic rock, and generally occur on slopes between 0-3 %. Runoff is negligible and permeability is moderate. Major uses are cropland. Altavista fine sandy loam occurs along the east boundary of the proposed easement in wetland/stream area. Table 1. Parcel Mapped Soil Series Map Percent Drainage Hydrologic Landscape Unit Map Unit Name Hydric Class Soil Group Setting Symbol GoA Goldsboro sandy 2o �� Moderately B Flats, Marine loam, 0 — 2% slopes well Terraces Ly Lynchburg sandy loam 6% Somewhat C Flats, Marine poorly Terraces Bb Bibb sandy loam, 90% Poorly D Floodplains frequently flooded Ra Rains sandy loam 90% Poorly B/D Flats, Marine Terraces Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 6 May 2017 Map Percent Drainage Hydrologic Landscape Unit Map Unit Name Hydric Class Soil Group Setting Symbol Broad interstream UcB Uchee loamy coarse 0% Well C divides on marine sand terraces, ridges on marine terraces GeB Gilead sandy loam 0% Moderate/Well C Marine terraces AaA Altavista fine sandy 9% Moderate/Well C Stream Terraces loam 2.3 Vegetation Current land use in the vicinity of the project is primarily agriculture and forest. Common species include red maple (Acer ruhrum), tulip poplar (Liriodendron tulipifera), sweetgum (Liquidamhar styraciflua), and swamp tupelo (Nyssa hiflora). Invasive species are widespread throughout the majority of the project area, most notably Chinese privet (Ligustrum sinense) and multiflora rose (Rosa multiflora). Riparian Restoration Vegetation along the top of Reach HBI is active cattle pasture with pockets of common rush (Juncus effusus) throughout the hydric areas. The left banks of 11133 and HB4 are also active cow pasture with common rush and other disturbed herbaceous vegetation. There is no tree or sapling stratum in these areas. Reaches THl, TH2, and TH3 are also active pasture, but have sparse tree cover. Reaches HB2 and 11171 are characterized as bottomland hardwood forests, that vary from functional to disturbed based on the degree of cattle access. Cattle do not have access to the streams from the southern parcels, therefore the riparian buffer along the right bank of 11132 and the entirety of Reach HE 1 is in much better condition with a full tree canopy. The confluence of HB4 and Hannah Creek at the downstream end of the project is a cypress -gum swamp community with a fully developed canopy, but lower stem density than seen in the other wooded reaches of the project. This area is dominated by swamp tupelo and bald cypress (Taxodium distichum). Japanese stiltgrass (Microstegium vimineum) is very common throughout the understory. Detailed observations of vegetation species, soils, and hydrology were recorded in each community type. 2.4 Wetlands The USFWS National Wetland Inventory Map (NWI) depicts three wetland areas within the site (Figure 3). A Freshwater Pond (PUBHh) is mapped within the mid -western part of the easement, a Freshwater Forested/Shrub Wetland (PFO IQ runs along 11134 in the northeastern part of the easement, and a Palustrine, Forested, Broad -Leaved Deciduous Wetland (PFO IF) is located in the eastside of the northern most portion of the easement. A wetland delineation was performed in May 2016. Wetland boundaries were delineated using current methodology outlined in the 1987 U.S. Army Corps of Engineers Wetland Delineation Manual (DOA 1987) and Regional Supplement to the U.S. Army Corps of Engineers Wetland Delineation Manual: Atlantic and Gulf Coastal Plain Region (Version 2.0) (U.S. Army Corps of Engineers 2010). Soils were characterized and classified using the Field Indicators of Hydric Soils in the United States, Version 7.0 Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 7 May 2017 (USDA-NRCS 2010). Wetland boundaries were marked with sequentially numbered wetland survey tape (pink/black striped). The jurisdictional wetland boundaries are depicted on Figure 7. Jurisdictional wetlands are present throughout the site. The wetlands are divided between heavily disturbed and functional. The wetland mitigation treatment will include planting pastures as forested wetlands, excluding livestock, and hydrologic uplift from grading out small ditches/swales and the adjacent stream restoration. A notification of jurisdictional determination was received on USACE on August 12, 2016. 2.5 Threatened and Endangered Species The US Fish and Wildlife Service (USFWS) database lists four endangered species for Johnston County, North Carolina: red -cockaded woodpecker (Picoides borealis), Tar River spinymussel (Eliptio steinstansana), dwarf wedgemussel (Alasmidonta heterodon), and Michaux's sumac (Rhus michauxii). No protected species or potential habitat for protected species was observed during preliminary site evaluations. RES submitted a request to USFWS for review and comments on the proposed Hannah Bridge Mitigation Project on April 8, 2016 in regards to any potential impacts to threatened and endangered species. A response from the USFWS received on May 5, 2016 stated that "the proposed project is not likely to adversely affect and federally -listed endangered or threatened species, their formally designated critical habitat, or species currently proposed for listing under the Act." Documentation is included in Appendix B. Table 2. Federally Protected Species in Johnston County Common Name Scientific name Federal Status Habitat Present Record Status Vertebrate: Red -cockaded woodpecker Picoides borealis E No Current Bald eagle Haliaeetus leucocephalus BGPA Yes Current Invertebrate• Tar River spinymussel Eliptio steinstansana E No Current Dwarf wed emussel Alasmidonta heterodon) E No Current Vascular Plant: Michaux's Sumac Rhus Michauxii E No Current E = Endangered; BGPA = Bald and Golden Eagle Protection Act Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 8 May 2017 2.6 Environmental and Cultural Constraints A review of the North Carolina State Historic Preservation Office GIS Web Service database revealed that there are National Registered listings within a one -mile radius of the proposed project area. No architectural structures or archeological artifacts have been observed or noted during preliminary surveys of the site for restoration purposes. RES submitted a request to the NC State Historic Preservation Office (SHPO) to search records to determine the presence of any areas of architectural, historic, or archaeological significance that may be affected by the Hannah Bridge Mitigation Site on April 8, 2016. In a letter dated April 4, 2016 the SHPO stated that they had "conducted a review of the project and are aware of no historic resources which would be affected by the project." Correspondence is provided in Appendix B. 2.7 FEMA Floodplain/Floodway Mapping Reaches H133 and HB4 are located within the FEMA 100 -year floodplain (Zone AE) of Hannah Creek, and approximately 200 feet of the downstream end of Reach HB4 is located within the FEMA floodway. However, no grading or construction activities are proposed along the portions of the project located within the FEMA floodway. Therefore, it is not anticipated that a No -rise or CLOMR will be required for the project. Hydrologic trespass is a not a concern for this project. While designing the Hannah Bridge project, appropriate measures were taken to eliminate hydrologic trespass of the adjacent agricultural fields and animal operations. The adjacent land use will not be affected by the proposed design, and no detrimental impacts are expected beyond the easement limits. 3 RESTORATION PLAN 3.1 Riparian Restoration Activities Riparian restoration adjacent to streams 14131, HB2, 11133, H134, HFI, HF2, and TH3 shown in Figures 7 and 8, was approved by the DWR letter dated June 11, 2015 and attached in Appendix B. The restoration of plant communities within the Parcel will not only provide stabilization and improve water quality within the easement limits, but also provide ecological benefits to the entire watershed. Vegetation within riparian buffers can vary depending on disturbance regime and adjacent community types, so the protected buffer easement will be planted with appropriate native species observed in the surrounding forest and species known to occur in similar environments. All riparian restoration activities will commence in concurrence with the stream mitigation activities and not before. Therefore, the mitigation area where riparian restoration is being performed may be altered slightly depending on the approval of the Stream Mitigation Plan for the Stream Mitigation Bank. The riparian restoration areas will be surveyed and information provided in the As -Built report. The current land use adjacent to the majority of the streams on the Bank Parcel is pasture. Livestock will be excluded from restoration areas by fencing installed to NRCS specifications. The Neuse buffer areas will be planted from top of bank back at least 50' from the stream with bare root tree seedlings on an 8 by 8 foot spacing to achieve an initial density of 680 trees per acre. The buffered channels will provide water quality and habitat functions within the sensitive Neuse River watershed. Some areas adjacent to the forested areas may require maintenance due to the rapid regeneration of some species. Rapidly regenerating species and invasive species may develop greater individual species density and create a less diverse mix. Minimal maintenance is anticipated due to the past cultivation history. Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 9 May 2017 3.2 Planting Plan Revegetation of the site will include treating invasive species growth and planting at least four native hardwood bare root trees planted at a density to ensure 260 stems per acre at the completion of monitoring. No one tree species will e greater than 50% of the established stems. Coastal Plain Small Stream Swamp will be the target community type and will be used for all areas within the project. The community is defined by Schafale and Weakely (1990). The initial planting of bare root trees will occur in Spring 2018 or during stream restoration work (whichever comes last). Tree species specified for planting on the Hannah Bridge Site are shown in Table 3. Table 3. Hannah Bridge Site Tree Planting List Common Name Scientific Name Indicator Growth Rate River Birch Betula nigra FACW ra id Willow Oak Quercus phellos FACW rapid Swamp Chestnut Oak Quercus michauxii FACW moderate Water Oak Quercus nigra FAC rapid American Sycamore Platanus occidentalis FACW rapid Swamp Tupelo Nyssa hiflora OBL moderate Overcup Oak Quercus lyrata OBL moderate Bald Cypress Taxodium distichum OBL rapid 3.3 Easement Boundaries and Fencing Easement boundaries will be identified in the field to ensure clear distinction between the Parcel and adjacent properties. Boundaries may be identified by cattle fence, marker, bollard, post, tree -blazing, or other means as allowed by site conditions and/or conservation easement. Boundary markers disturbed, damaged, or destroyed will be repaired and/or replaced on an as needed basis. The easement boundary will be checked annually as part of monitoring activities and the conditions as well as any maintenance performed will be reported in the annual monitoring reports to NC DWR. 4 MONITORING AND MAINTENANCE PLAN 4.1 Monitoring Protocol and Success Criteria Riparian buffer vegetation monitoring will be based on the CVS-EEP Protocol for Recording Vegetation Level 1-2 Plot Sampling Only Version 4.0. Annual vegetation monitoring will occur each year during the fall season with the first year occurring at least 5 months from initial planting. As part of the stream mitigation plan, twenty-five (25) vegetation monitoring plots will be installed a minimum of 100 mZ in size, and will cover at least two percent of the planted mitigation area. Eight (8) of these plots will be located in buffer/nutrient offset areas. The following data will be recorded for all trees in the plots: species, height, planting date (or volunteer), and grid location_ The measures of vegetative success for the Parcel will be the survival of at least 4 native hardwood tree species, where no one species is greater than 50% of the established stems, established at a density of at least 260 planted trees per acre at the end of Year 5. Native volunteer species may be included to meet the performance standards. Invasive and noxious species will be monitored and treated so that none become dominant or alter the desired community structure of the site. Initial plant maintenance may include a one-time mowing, prior to initial planting to remove undesirable species. If mowing is deemed necessary by EBX during the Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 10 May 2017 monitoring period, EBX must receive approval by the DWR prior to any mowing activities to ensure that no buffer violations have been performed. Failure to receive approval to mow within the Neuse buffer, as defined in 15A NCAC 02B .0233, by the DWR could result in Neuse buffer violations and violations of the conservation easement. If necessary, EBX will develop a species-specific treatment plan. 4.2 Adaptive Management Plan In the event that the site, or a specific component of the site, fails to achieve the defined success criteria, RES will develop necessary adaptive management plans and/or implement appropriate remedial actions for the site in coordination with the NC DWR. Remedial actions will be designed to achieve the success criteria specified previously, and will include identification of the causes of failure, remedial design approach, work schedule, and monitoring criteria that will take into account physical and climatic conditions. 4.3 Long Term Management Plan EBX Neuse I, LLC, (EBX) acting as the Bank Sponsor, will record a Conservation Easement with the Johnston County Register of Deeds Office. EBX will monitor the Site for a minimum of five years, or until NC DWR approval. Riparian restoration outside of the mitigation area for buffer and nutrient offset credits will be monitored in accordance with the monitoring protocol in the Selma Stream Mitigation Plan. This BPDP provides detailed information regarding bank operation, including long term management and annual monitoring activities, for review and approval by the NC DWR. The Conservation Easement has been assigned to The North Carolina Wildlife Habitat Foundation (NCWHF). All monitoring activities, including periodic inspections of the site to ensure restrictions required in the Conservation Easement are upheld, are the responsibility of EBX until the Parcel is transferred to the NCWIIF. Endowment funds required to uphold the Hannah Bridge Bank Parcel easement in perpetuity shall be negotiated prior to site transfer to the NCWHF. The Bank Sponsor has ensured that the Conservation Easement allows for the implementation of an initial monitoring phase, which will be developed during the design phase and conducted by the Bank Sponsor. The Conservation Easement will allow for yearly monitoring and, if necessary, maintenance of the Site during the initial monitoring phase. These activities will be conducted in accordance with the terms and conditions of the Hannah Bridge Riparian Buffer and Nutrient Offset Mitigation Banking Instrument made and entered into by EBX-Neuse I, LLC and NC DWR. 5 FINANCIAL ASSURANCE The Sponsor will provide financial assurances in the form of Performance Bonds sufficient to assure one -hundred percent (100%) completion of all mitigation work, required reporting and monitoring, and any remedial work required. Financial assurances will be payable at the direction of the NC DWR to its designee or to a standby trust. Financial assurances structured to provide funds to the NC DWR in the event of default by the Bank Sponsor are not acceptable. The initial performance bond will be in the amount of at least $150,000 and shall be able to cover 100% of the costs associated with construction of the riparian restoration areas. The monitoring bond shall be in the amount of at least $100,000 and shall be able to cover 100% of the costs associated with the monitoring and maintenance of the riparian restoration areas for five years. Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 11 May 2017 6 MITIGATION POTENTUL The Hannah Bridge Site presents 46.2 acres of permanent conservation easement in Johnston County, North Carolina. While this easement also encompasses areas for the Hannah Bridge Stream Mitigation Bank, the purpose of the Hannah Bridge Riparian Buffer and Nutrient Offset Mitigation Bank is to generate Neuse riparian buffer mitigation and nutrient offset. Once finalized, a conservation easement and final recorded plat will be provided in Appendix C. The width of the buffer/nutrient credit generation area will begin at the most landward limit of the top of bank or the rooted herbaceous vegetation and extend landward to a maximum distance of 200 feet. These rules are in accordance with Rule 15A NCAC 02B.0295; buffer preservation credits meet the requirements described in Paragraph (m) subparagraph (2) (D) - Alternative Buffer Mitigation Options - Preservation of Buffers on Subject Streams. According to the MBI, the generated nitrogen offset credit per acre in the Neuse River watershed is 2,273.02 pounds per acre. This Parcel has the potential to generate approximately 5.09 acres of riparian buffer restoration credits, 0.48 acres of riparian buffer enhancement credits, 1.85 acres of riparian buffer preservation credits, and 4.25 acres of nutrient offset credits. The riparian buffer mitigation credits generated will service Neuse Buffer impacts within the USGS 8 -digit HUC 03020201 of the Neuse River Basin. The Nitrogen nutrient offsets generated will service nutrient load reduction requirements where payments are authorized in 15A NCAC 02B .0240 within the USGS 8 -digit HUC 03020201, excluding the Falls Lake Watershed. The total potential mitigation credits that the Hannah Bridge Bank will generate are summarized in Table 4; Figure 8. Table 4. Proposed Mitigation Credits Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 12 May 2017 Buffer Credit Zone Credit Type Acreage Credit Per Acre (sq ft) Ratio Mitigation Assets (sq ft) Buffer Restoration 5.09 43,560 1:1 221,720 0-100' Buffer Enhancement 0.24 43,560 2:1 5,227 Buffer Preservation 1.46 43,560 10:1 6,360 Buffer Restoration N/A N/A N/A N/A 101- 200' Buffer Enhancement 0.24 43,560 6:1 1,742 Buffer Preservation 0.39 43,560 30:1 566 TOTAL 7.42 235,616 Nutrient Credit Zone Credit Type Acreage Credit Per Acre (lbs) Ratio Mitigation Assests (lbs) 0-100' Nitrogen 1.06 2,273.02 N/A 2,409.40 101- 200' Nitrogen 3.19 2,273.02 N/A 7,250.93 TOTAL 4.25 9,66034 Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 12 May 2017 The Sponsor may use the 5.09 acres (221,720.00 ftZ) of riparian restoration areas for either Neuse buffer credits or Nitrogen nutrient offset credits, but not both. The Sponsor must submit a written request and receive written approval from DWR prior to any credit conversions and transfers to the buffer and nutrient offset credit ledgers. With each conversion and transfer request submitted to the DWR, the Sponsor will provide all updated credit ledgers showing all transactions that have occurred up to the date of the request. Available wetland mitigation credits (credits that have been released by the ACOE but not sold by the Sponsor) that are generated from restoration, or enhancement within the riparian areas (top of bank — 200') adjacent to the streams on this Bank Parcel, and comply with 15A NCAC 02B .0295, may be converted and transferred from wetland mitigation credits to Riparian Buffer Credits upon written approval from the DWR. Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 13 May 2017 7 REFERENCES NCDENR. 2009. "Neuse River Basinwide Water Quality Plan." Division of Water Quality. http:// http://portal.ncdenr.org/web/wq/ps/bpu/basin/neuse/2009. (October 2013). NCDENR. 2010. 'N.C. Wetland Assessment Method User Manual Version 4.1." N.C. Wetland Functional Assessment Team. NC Environmental Management Commission. 2014. Rule 15A NCAC 02B.0295 - Mitigation Program Requirements for the Protection and Maintenance of Riparian Buffers. Schafale, M.P. and A.S. Weakley. 1990. Classification of the Natural Communities of North Carolina, Third Approximation. North Carolina Natural Heritage Program, Division of Parks and Recreation, NCDENR, Raleigh, NC. Hannah Bridge Parcel Development Plan Buffer/Nutrient Offset Site 14 May 2017