Loading...
HomeMy WebLinkAbout20190210 Ver 1_A-11 GP narrative_20190214,>�� ST/ T�� ,N,��. �Loo ��v� ' q5<a E ''�= " . � g' � ''o r� � �� �� '�. +�w�>rF '"Z�° e��v��,o STATE OF NORTH CAROLINA DEPARTIV�NT OF TRANSPORTATION ROY COOPER GOVERNOR February 14, 2019 Mrs. Crystal Amschler U. S. Army Corps of Engineers NCDOT Regulatory Project Manager 151 Patton Avenue, Room 208 Asheville, NC 28801-2714 JAMES H. TROGDON, III SECRETARY Subject: General Permit 31 Application NC 69 From Georgia State Line to US 64 Blair Creek (Class. WS-IV), Hyatt Mill Creek (Class. C), Wood Creek (Class C), and unnamed tributaries (UT) to those creeks and a UT to Lake Chatuge (Hiwassee River, Class. B) Clay County, NC TIP No. A-11, State Project No. 32574.1 Dear Mrs. Amschler: The North Carolina Deparhnent of Transportation (NCDOT) is requesting authorization for stream and wetland impacts that are necessary for improvements to the 3.79-mile long NC 69 near Hayesville in Clay County, NC. This federally-funded project involves widening from a combination 2-lane and 2-lane with center turn lane roadway to a divided 4-lane roadway with vertical and horizontal alignment improvements. The work will require stream and wetland impacts to accommodate iill slopes, culvert extensions, channel relocations, and stream bank stabilization. Section 7 In Clay County, the green pitcher plant (Sarracenia oreophila), rock gnome lichen (Gymonoderma lineare), and the northern long-eared bat (NLEB, Myotis septentrionalis) are known from current records and are listed as federally endangered or threatened. Gray bat (Myotis grisescens) and Indiana bat (Myotis sodalis) are listed species that are likely or suspected to occur in Clay County. Green pitcher plants are found within a few miles of the project area, but this species was not observed in field surveys of the project area. The wetlands that will be impacted by the project are not sloped bogs that this plant needs. Therefore, the project should have no effect on green pitcher plants. MailingAddress: Telephone: (828)586-2141 Location: NC DEPARTMENT OF TRANSPORTATION Fax: (828)586-4043 NC DEPARTMENT OF TRANSPORTATION Division 14 CustomerService: 1-877-368-4968 Division 14 253 Webster Road 253 Webster Road Sylva, North Carolina 28779 Website.• www.ncdot.¢ov Sylva, North Carolina 28779 A-11, Clay County Page 2 February 14, 2019 Rock gnome lichen is usually found in high elevation locations in western North Carolina, though it can occasionally be found at lower elevations on rock faces, usually in deep river gorges. The project area is much too low in elevation and lacks rock faces and other damp habitat conditions required by this plant. Gray bats usually roost in caves or in/on structures year-round while Indiana bats and NLEB only winter in caves. During warm seasons Indiana bats and NLEB usually roost on/in structures, under the shaggy bark of live trees such as white oaks, sycamores, and hickories, or in cavities or under the loose peeling bark of dead trees. This project will require tree removal, but not affect caves or structures that could serve as bat roosts. Culverts and bridges that could be used by bats and that will be affected by construction were inspected at least twice without observing bats or their sign. The project area is not situated in a region (i.e. "red HUC") where there are known NLEB maternity roosts and/or hibernacula and the nearest records are over 10 miles away. The construction work will require the removal of trees from forested areas totaling roughly 25 acres. There will likely be percussive activities with the project (hoe-ramming and/or jack hammering) to break concrete and installation of guardrail, but this wark should be internuttent and infrequent and probably be limited to a few hours a day in some weeks. There are no areas where bedrock blasting is anticipated. To protect Indiana bats, obstructing trees will be removed between October 15 and April 15 (winter clearing) of any year. With the clearing restriction, a"may affect, not likely to adversely affecP' determination for Indiana bat should apply to the project. This tree clearing restriction will also protect other potentially roosting bats in the area from direct disturbance as well. Based on this and the preceding information, the project should have "no effecP' on gray bats and be compliant with the Final Section 4(d) rule for NLEB, codified at 50 C.F.R. § 17.40(0) and effective February 16, 2016. The USFWS informal concurrence on this project is included in the application. Section 106 This project was reviewed by NCDOT's Human Environment Unit for potential effects to architectural and archaeological resources. There was a determination of "No Eligible or National Register Properties Present or Affected" for archaeology. The project will have no effects on the federal register eligible Cherry Farm and no adverse effect on the federal register eligible McClure Farm. Screening forms and the effects determination for historic architecture are included with the application. Impacts to Waters of the United States Blair Creek (Class. WS-IV), Hyatt Mill Creek (Class. C), Wood Creek (Class C), and unnamed tributaries (UT) to those creeks and the UT to Lake Chatuge (Hiwassee River, Class. B) have well defined channels and banks. Lake Chatuge and the Hiwassee River meet the definition of a Traditional Navigable Waters. Therefore, we believe the affected streams are under the jurisdiction of the U.S. Army Corps of Engineers. In order to construct the project, it will be necessary to impact waters of the United States in the Hiawassee River Basin (HCTC 06020002). Impacts are listed in the PCN and are also provided in the separate impact summary table on sheets 44-45 which was modified from the attached plans. The preliminary JD forms have been submitted previously and a site visit was conducted in September 2017 with Ms. Lori Beckwith from your office. A-11, Clay County Page 3 February 14, 2019 Compensatory Mitigation and Plan NCSAM rating sheets were included in the PJD submittal. Stream relocation details are included on the plan sheets or, for sites 5 and 12, in separate plan sheets that detail natural design techniques. A stream monitoring plan was prepared for Site 5. Visual monitoring with photo documentation for 5 years is proposed for Site 12. In addition, the NCSAM ratings for each stream are recorded on the separate Stream and Wetland Impact Summary Tables (sheets 44-45) that were modiiied from the permit drawings. Values used to calculate the needed mitigation for unavoidable project impacts of the project are included in the tables to facilitate your review. There are five streams in the project area that scored MED and HI with NCSAM. The total proposed culvert impacts to these streams tota1351 feet. The streams with LOW ratings are in poor condition largely due to erosion and having narrow or absent buffers. Several streams that will be relocated with this project received LOW rating in part due to past disturbance including channel relocations and hardening that occurred in the early 1990's for previous improvements to NC 69. Partial as-built plan sheets for that construction are attached to the PCN submittal for reference. For sites with "LOW" NCSAM ratings, a 1:1 ratio is suggested far the applicable culvert impacts and the channel length losses from stream relocations (combined total of 721 feet). The relocated stream channels at Site 5 and 12 will have net gains in channel lengths and have more stable dimensions than the existing channels due to the use of natural stream design techniques. In addition, a vegetated riparian buffer that averages >30 feet in width will be reestablished on the Site 5 relocation and live stakes will be planted along the Site 12 relocated channel. Due to functional uplifts, we recommend that additional compensatory mitigation should not be required for these impacts. A total of 859 feet of channel relocations are proposed with rip rap channel protection due to anticipated high shear stress. The majority of these stream reaches involve small streams (�1-2' wide) that are fishless and have little to no buffers. And, as noted above, several of these streams were relocated, straightened, and hardened in the past. Where rip rap is used in the relocated channels, contractors will be instructed to embed the rock into the channel bottom with heavy equipment to "choke-out" the large inter-rock spaces and expedite bedload "naturalization". Since no functional uplift is proposed to these channels, while recognizing that they already are limited in their habitat and water quality functions, we recommend a low mitigation ratio (0.25:1) be used for impacts to these channels, excluding channel length losses to be mitigated at a 1:1 ratio. Permits Requested NCDOT hereby requests authorization under Section 404 of the Clean Water Act to proceed with the construction project outlined above. NCDOT requests authorization for the project under Section 401 of the Clean Water Act from the North Carolina Deparhnent of Environmental Quality, Division of Water Resources (DWR). The project area is, in part, within a"designated trout watershed" (as described in the Nationwide Regional Permit Conditions) and we therefore are requesting comments on this request from the NC Wildlife Resources Commission. Please contact me at (828) 586-2141 if you have any questions or need additional information to evaluate this request. Your prompt attention to this request is greatly appreciated. A-11, Clay County Page 4 February 14, 2019 Sincerel�, DocuSig ed by: ����� 2/14/2019 �'N�i�1�+ Division 14 Environmental Officer Enclosures cc: Ms. Amy Chapman, Division of Water Resources, DEQ, Raleigh Ms. Kristie Lynn Carpenter, Division of Water Resources, DEQ, Raleigh Mr. Kevin Barnett, Division of Water Resources, DEQ, Asheville Mrs. Marla Chambers, Western NCDOT Coordinator, NCWRC Mr. Kenneth McDowell, Division 14, Assistant DDC Engineer, NCDOT