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HomeMy WebLinkAbout20200420 Ver 1_WRC Comments_20200414ltl North Carolina Wildlife Resources Commission 0 Gordon Myers, Executive Director April 14, 2020 Mr. David Brown U.S. Army Corps of Engineers, Regulatory Branch 151 Patton Avenue, Room 208 Asheville, North Carolina 28801-5006 SUBJECT: N. Pacolet River Bank Stabilization (Strickland) North Pacolet River, Polk County Dear Mr. Brown: Biologists with the North Carolina Wildlife Resources Commission (NCWRC) reviewed an application to stabilize 700 feet of streambank with riprap on the North Pacolet River in Polk County. Our comments on this application are offered for your consideration under provisions of the Clean Water Act of 1977 (33 U.S.C. 466 et. seq.) and Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d). Project activities should not impact wild trout, and a trout moratorium is not needed. However, this part of the North Pacolet River supports the Broad River Spiny Crayfish (Cambarus spicatus, NC Special Concern) and the Seagreen Darter (Etheostoma thalassinum, NC Significantly Rare). The application proposes to stabilize an eroding streambank with riprap. Buttonbush or comparable plantings would be planted above the riprap on the bank slope, and native trees would be protected or planted on top of the bank. We reviewed similar permit applications in 2016, 2018, and 2019 to stabilize other sections of the North Pacolet River on the same property with riprap. We support the landowner's intention to establish a native woody buffer. However, we recommend against using riprap for such a long area of bank; riprap is not likely to provide a long-term solution to erosion. Instead, we recommend that bioengineering and natural channel design methods, such as in -stream structures, geolifts, bank sloping, and planting, be used to stabilize the banks. Mailing Address: Habitat Conservation • 1721 Mail Service Center • Raleigh, NC 27699-1721 Telephone: (919) 707-0220 • Fax: (919) 707-0028 N Pacolet Stabilization - Strickland N Pacolet R, Polk County March 7, 2019 Due to the systemic instability of the river channel, it is likely that a bigger picture restoration project is needed, involving in -stream structures, bank sloping, and riparian planting; we recommend that the landowner consult with the Polk County Soil and Water Conservation District to develop a longer -term solution. We offer the following recommendations to minimize impacts to the aquatic community: 1. Bioengineering and natural channel design methods, such as in -stream structures, geolifts, bank sloping, and native vegetation should be used instead of rock to stabilize the bank if at all possible. 2. Work should be accomplished as quickly as possible and vigilance used in sediment and erosion control during site preparation, construction, and clean up. Disturbed areas should be seeded, mulched and/or matted as soon as possible, preferably at the end of each work day. 3. Any erosion control matting used should be free of plastic or nylon mesh, as this type of mesh netting frequently entangles wildlife and is slow to degrade, resulting in a hazard that may last for years. 4. We appreciate the landowner's intention to eradicate non-native kudzu and establish a native buffer. We encourage the landowner to establish a buffer as wide as possible; a wide forested buffer can ensure greater bank stability, filter overland pollutants, and provide habitat for birds and other wildlife. Thank you for the opportunity to review and comment on this project. Please contact me at (828) 803-6054 if you have any questions about these comments. Sincerely, Andrea Leslie Mountain Region Coordinator, Habitat Conservation Program ec: Cynthia Strickland, landowner Andrew Moore, NC Division of Water Resources