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HomeMy WebLinkAbout20180066 Ver 1_19-325_USFWS_20201023United States Department of the Interior FISH AND WILDLIFE SERVICE Asheville Field Office 160 Zillicoa Street Asheville, North Carolina 28801 August 13, 2019 Megan Engel RES 302 Jefferson Street, Suite 110 Raleigh, North Carolina 27605 Dear Ms. Engel: Subject: Dead Oak Mitigation Project (Scoping); Buncombe County, North Carolina Log No. 4-2-19-325 The U.S. Fish and Wildlife Service (Service) has reviewed the information provided in your correspondence dated July 12, 2019 wherein you solicit comments regarding potential impacts to federally protected species that may result from the proposed project. We submit the following comments in accordance with the provisions of the Fish and Wildlife Coordination Act, as amended (16 U.S.C. 661-667e); the National Environmental Policy Act (42 U.S.C. §4321 et seq.); and section 7 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543) (Act). Project Description According to the information provided, the proposed project aims to restore, enhance, and preserve >11,000 linear feet of stream channel adjacent to the Sandy Mush Game Lands near Alexander, North Carolina. The proposed work area and adjacent uplands are dominated by agricultural landcover (primarily pasture). Federally Listed Endangered and Threatened Species According to Service records and the aerial imagery provided in your correspondence, suitable summer roosting habitat may be present in the project area for the federally threatened northern long-eared bat (Myotis septentrionalis). However, the project would occur at a location where any incidental take that may result from associated activities is exempt under the 4(d) rule for this species. In the interest of protecting habitats for this and other species, tree removal should be selective and clearing of vegetation should be minimized to what is necessary to provide healthy streambank and bed habitats. Reaches with well -vegetated riparian areas should be first considered for preservation, rather than for restoration or enhancement activities to preclude unwarranted disturbances to existing habitats. We encourage you to avoid associated tree clearing activities during the maternity roosting season from May 15 — August 15, and particularly during the pup season (June 1 — July 31). Based on the information provided and Service species records, no other federally protected species or their respective habitats occur within the project area and we require no further action at this time. Please be aware that in accordance with the Act, it is the responsibility of the appropriate federal agency or its designated representative to review its activities or programs and to identify any such activities or programs that may affect endangered or threatened species or their habitats. If it is determined that the proposed activity may adversely affect any species federally listed as endangered or threatened, formal consultation with this office must be initiated. We offer the following general recommendations in the interest of protecting these and other fish and wildlife resources: Stream Channel and Bank Restoration A natural, stable stream system is one that is able to transport a wide range of flows and associated sediment bed load while maintaining channel features and neither degrading nor aggrading. Alterations to the dimension, pattern, or profile of the stream channel as well as changes to streambank vegetation, floodplains, hydrology, or sediment input can significantly alter this equilibrium. We understand that this stream reach is highly modified, and restoring the site to a natural state may not be feasible. Still we offer the following recommendations: Only the absolute minimum amount of work should be done within stream channels to accomplish necessary reconstruction. The amount of disturbance to in -stream and riparian areas should not exceed what can be stabilized by the end of the workday. Restoration plans should account for the constraints of the site and the opportunities to improve stream pattern, dimension, and profile with minimal disturbance. 2. Reconstruction work should follow natural channel design methodologies that are based on the bank -full, or channel -forming, stage of the stream. Bank -full stage maintains the natural channel dimensions and transports the bulk of sediment over time. Natural channel conditions should be identified using a reference reach (nearby stream reaches that exemplify restoration goals). Restoration design should match the pattern, dimension, and profile of the reference reach to ensure the project's success. The Service is available to assist with the identification of reference reaches. All work in or adjacent to stream waters should be conducted in a dry work area to the extent possible. Sandbags, cofferdams, bladder dams, or other diversion structures should be used to prevent excavation in flowing water. These diversion structures should be removed as soon as the work area is stable. 4. Equipment should not be operated in the stream unless absolutely necessary. Machinery should be operated from the banks in a fashion that minimizes disturbance to woody vegetation. Equipment should be: (a) washed to remove any contaminant residue prior to project construction, (b) in good working order, and (c) checked to ensure there are no leaks of potential contaminants (such as oil or other lubricants) prior to and during construction. 5. Streambanks with deep-rooted woody vegetation are the most stable, and stream restoration efforts should incorporate the use of native vegetation adapted to the site conditions. Live dormant stakes may be used to reestablish root structure in riparian areas. In areas where banks are severely undercut, high, and steep, whole -tree revetment or rock may be used as a stabilization treatment (small rock, gravel, sand, and dirt are not recommended due to their erosive nature), and it should not extend above the bank -full elevation (the elevation of the channel where the natural floodplain begins). Deep -rooting woody vegetation should be established along banks where any channel work is accomplished. Tree and shrub plantings should be spaced at intervals no greater than 10 feet along banks. Vegetated riparian zone widths should be as wide as practical but should extend at least 30 feet from the stream channel. 6. Adequate measures to control sediment and erosion must be implemented prior to any ground -disturbing activities in order to minimize effects on downstream aquatic resources. In North Carolina, non -cohesive and erosion -prone soils are most common in the felsic-crystalline terrains of the mountain and upper piedmont regions. Therefore, reconstruction work should be staged such that disturbed areas would be stabilized with seeding, mulch, and/or biodegradable (coir) erosion -control matting prior to the end of each workday. No erosion -control matting or blankets should contain synthetic (netting) materials as they trap animals and can persist in the environment beyond their intended purpose. Matting should be secured in place with staples; stakes; or, wherever possible, live stakes of native trees. If rain is expected prior to temporary seed establishment, additional measures should be implemented to protect water quality along slopes and overburden stockpiles (for example, stockpiles may be covered with plastic or other geotextile material and surrounded with silt fencing). The Service appreciates the opportunity to provide these comments. Please contact Mr. Byron Hamstead of our staff at 828/258-3939, Ext. 42225, if you have any questions. In any future correspondence concerning this project, please reference our Log Number 4-2-19-325. Sincerely, - - original signed - - Janet Mizzi Field Supervisor