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HomeMy WebLinkAbout20180612 Ver 1 _WRCComments _201806151�1 North Carolina Wildlife Resources Commission 0 Gordon Myers, Executive Director June 15, 2018 Mr. David Brown U.S. Army Corps of Engineers, Regulatory Branch 151 Patton Avenue, Room 208 Asheville, North Carolina 28801-5006 SUBJECT: Western Carolina University 2014 Master Plan Improvements UT to Cullowhee Creek and wetlands, Jackson County SAW -2015-00263 Dear Mr. Brown: Biologists with the North Carolina Wildlife Resources Commission (NCWRC) reviewed the individual 404 permit application for Western Carolina University 2014 Master Plan Improvements project, which would impact 0.383 acre of wetland and 500 ft of an unnamed tributary (UT) to Cullowhee Creek in Jackson County. NCWRC visited the site on March 20, 2018. 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). Western Carolina University intends on constructing a parking lot, culverting 500 ft of UT Cullowhee Creek and filling 0.293 acre of wetland, and improving its existing soccer field, filling 0.09 acre of wetland. The parking lot would be constructed on fill, and the stream culverted with a 60 -inch reinforced concrete pipe. Underground stormwater treatment is proposed, but no details are provided. Project activities should not impact wild trout reproduction, and a moratorium is not needed. However, Cullowhee Creek is part of the Tuckasegee River Aquatic Habitat, a natural area rated Exceptional by the NC Natural Heritage Program due to the richness of rare species it contains. Near the project, Cullowhee Creek and the Tuckasegee River support a number of listed and rare aquatic species, including the Sicklefin Redhorse (Moxostoma sp., US Candidate, NC Threatened), Eastern Hellbender [Cryptobranchus alleganiensis, US Federal Species of Concern (FSC), NC SC (Special Concern)], Little Tennessee Crayfish (Cambarus georgiae, US FSC, NC SC), and French Broad River Crayfish (Cambarus reburrus, US FSC, NC Significantly Rare). Mailing Address: Habitat Conservation • 1721 Mail Service Center • Raleigh, NC 27699-1721 Telephone: (919) 707-0220 • Fax: (919) 707-0028 WCU 2014 Master Plan Improvements Page 2 June 15, 2018 UT Cullowhee Cr, Jackson County We offer the following comments and recommendations on this project: It is extremely important that excellent erosion and sediment control be used during site staging, construction, and cleanup to protect downstream Cullowhee Creek and Tuckasegee River. To protect the rare and listed species in the Tuckasegee River, we request the use of sediment and erosion control practices outlined in the Design Standards in Sensitive Watersheds (15A NCAC 4B .0124). In addition, disturbed areas should be seeded, mulched and/or matted as soon as possible, preferably at the end of each work day; at a minimum, disturbed areas should be stabilized within five working days or seven calendar days, whichever is shorter. Instream work should be performed in the dry and water routed around the work area. Matting used on site should be free of nylon or plastic mesh; this type of mesh netting frequently entangles wildlife and is slow to degrade, resulting in a hazard lasting for years. A mitigation ratio of 1:1 is proposed for wetland and stream impacts. NCWAM and NCSAM scores for the wetlands were Medium. The proposed stream and wetland impacts are especially concerning due to their proximity to the Tuckasegee River; and NCWRC recommends that a higher ratio of 2:1 be used for stream and wetland impacts for this project. Effective stormwater management is essential in minimizing impacts to downstream waters. Stormwater control measures should mimic the hydrograph consistent with an impervious coverage of less than 10%. We recommend the use of Low Impact Design techniques, such as grassed swales and pervious pavement; curb and gutter, catch basins, and underground piping of stormwater should be avoided. As stormwater runoff from pavement can cause short-term temperature spikes in downstream waters, mechanisms to lower stormwater temperature should be incorporated into the stormwater management design. 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: Clement Riddle, C1earWater Environmental Consultants Kevin Mitchell & Sue Homewood, NC Division of Water Resources Byron Hamstead, US Fish and Wildlife Service Amanda Bushon, NCWRC