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HomeMy WebLinkAbout20170511 Ver 1_WRC Comments_201705089 North Carolina Wildlife Resources Commission 9 Gordon Myers, Executive Director May 8, 2017 Mr. David Brown U.S. Army Corps of Engineers, Regulatory Branch 151 Patton Avenue, Room 208 Asheville, North Carolina 28801-5006 SUBJECT: George Belflower Stream Stabilization UTs to Roberson Creek, Rutherford County Dear Mr. Brown: Biologists with the North Carolina Wildlife Resources Commission (NCWRC) reviewed an application to stabilize 650 feet of two unnamed tributaries (UTs) to Roberson Creek in Rutherford 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 will not impact wild trout, and observance of a trout moratorium is not required. The project involves the stabilization of two UTs to Roberson Creek using natural channel design techniques, including bankfull benches, in -stream structures, bank sloping, and planting. According to Renee Ray with the Natural Resources Conservation Service, the planted buffer width will be 35 feet from the stream's center on each side of the stream. Most of the in -channel work will be performed in the wet, with equipment operated from the top of the bank. We are supportive of the stream stabilization work, as it should address channel instability and improve in -stream habitat. However, the stabilization work will occur after the construction of an on-line pond just upstream of one of the stream stabilization locations. Construction of this pond does not require US Army Corps of Engineers authorization, as it is to be used as a farm pond to provide water for irrigation and to water livestock. On-line impoundments are detrimental to stream integrity, as they can change downstream water temperature (which is especially detrimental in the warm months, when they can significantly heat up water temperature), provide a barrier to aquatic movement, alter water chemistry, and change aquatic food web dynamics. The benefits of aquatic habitat restoration in the downstream reach will Mailing Address: Habitat Conservation • 1721 Mail Service Center • Raleigh, NC 27699-1721 Telephone: (919) 707-0220 • Fax: (919) 707-0028 George Belflower Stream Stabilization UTs to Robeson Creek, Rutherford County May 8, 2017 likely be limited by the pond's impacts on the stream. These negative impacts can be lessened by constructing an off-line pond, diverting a portion of the stream's flow to the pond. We offer the following recommendations to minimize impacts to terrestrial and aquatic resources from the project: 1. Project activities should be accomplished as quickly as possible and vigilance used in sediment and erosion control during site preparation, construction, and clean up. 2. Disturbed areas should be seeded, mulched and/or matted as soon as possible, preferably at the end of each work day. 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. 3. In -stream construction should be performed during low flow periods. 4. For pond construction, we recommend an off-line design. Regardless of whether it is off or on-line, stream flow should be routed around excavation areas and the work completed during a period of forecasted dry weather. Some flow downstream of the pond should be maintained during pond filling. Thank you for the opportunity to review and comment on this project. Please contact me at (828) 558-6011 if you have any questions about these comments. Sincerely, Andrea Leslie Mountain Region Coordinator, Habitat Conservation Program ec: Buddy Belflower, landowner Renee Ray, Natural Resources Conservation Service Amy Anino, NC Division of Water Resources Byron Hamstead, US Fish and Wildlife Service