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Home My WebLink About20150821 Ver 1_WRC Comments_20160718 Wanucha, Dave From:Chambers, Marla J Sent:Monday, July 18, 2016 1:28 PM To:Wanucha, Dave Subject:RE: Bridge 103 to culvert - Stokes Co WRC Comments I’m sorry, I don’t believe I ever addressed the mussel that you asked about. My thought is that the ways the mussel could be impacted is if fish passage is hindered, as they depend on fish for part of their life cycle and to distribute the young, and if heavy sedimentation or turbidity occurs, which can clog gills and suffocate the mussels. Marla Marla Chambers // NCDOT Coordinator Habitat Conservation Program NC Wildlife Resources Commission c/o NCDOT 206 Charter Street Albemarle, North Carolina 28001 office: 704-982-9181 mobile: 704-984-1070 Marla.chambers@ncwildlife.org ncwildlife.org From: Wanucha, Dave Sent: Tuesday, June 28, 2016 8:02 AM To: Chambers, Marla J <marla.chambers@ncwildlife.org> Subject: RE: Bridge 103 to culvert - Stokes Co Hi Marla, The riffle is natural. I agree the best way to fix it would be to alter the riffle (probably by hand) to lower the elevation. They may could build up the benches inside the culvert, but I doubt they will agree to that. DOT explained that they did not backfill the culvert because of concern with damaging the bottom of the culvert. They were planning to let it backfill naturally. I also wanted to check with you because your comment letter mentioned a mussel spp. of concern the Green Floater (Alasmidonta subviridis). Would existing conditions of the culvert have any impact relative to the mussel? It may provide some leverage with DOT discussions. Dave W. Dave Wanucha Division of Water Resources Transportation Permitting Unit NC Department of Environmental Quality 1 336-776-9703 office 336-403-5655 mobile Dave.Wanucha@ncdenr.gov NC DEQ Winston Salem Regional Office 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Chambers, Marla J Sent: Monday, June 27, 2016 9:44 PM To: Wanucha, Dave <dave.wanucha@ncdenr.gov> Subject: RE: Bridge 103 to culvert - Stokes Co Was the downstream riffle constructed or natural? I’m wondering if it was the culvert or a constructed riffle that were incorrectly set. Also, is there some wiggle room in the hydraulics of the culvert? – In other words, would building up the benches in the culvert to a higher elevation cause problems hydraulically? It seems that either the culvert or the riffle (if constructed) would need to be altered. Marla Marla Chambers // NCDOT Coordinator Habitat Conservation Program NC Wildlife Resources Commission c/o NCDOT 206 Charter Street Albemarle, North Carolina 28001 office: 704-982-9181 mobile: 704-984-1070 Marla.chambers@ncwildlife.org ncwildlife.org From: Wanucha, Dave Sent: Friday, June 24, 2016 12:44 PM To: Chambers, Marla J <marla.chambers@ncwildlife.org> Subject: Bridge 103 to culvert - Stokes Co 2 Hi Marla, This aluminum box culvert project was completed last month. I visited the site earlier this week and observed that the outlet floodplain benches were underwater (see pics). I thought it might be a downstream beaver dam, but it was a downstream riffle that’s at a higher elevation than the benches. Any thoughts? Dave Wanucha Division of Water Resources Transportation Permitting Unit NC Department of Environmental Quality 336-776-9703 office 336-403-5655 mobile Dave.Wanucha@ncdenr.gov NC DEQ Winston Salem Regional Office 450 West Hanes Mill Road, Suite 300 Winston Salem, NC 27105 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. 3