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HomeMy WebLinkAbout20191305 Ver 1_Highlands_TroutWaiver_Final_02.5.20_20200205February 4, 2020 Mr. Stan Aiken NCDEQ Division of Energy, Mineral, and Land Resources 2090 U.S. 70 Highway Swannanoa, NC 28778 RE: Highlands Retail Development Site Project Trout Waiver Application Mr. Aiken Enclosed find the referenced project permit application with the following attachments: 1) Trout Waiver Supplemental Information Form 2) Trout Waiver Narrative 3) Agent Authorization Form 4) Location Map 5) Site Plan Set 6) Photosheets As noted in the attached narrative –The purpose of the project is to develop a retail site on the Subject Property while minimizing impacts to streams and wetlands. If you have any questions or concerns do not hesitate to call. If you have any questions regarding this report, feel free to contact me at adam@bfec.org / 423.727.4476 or Michelle Campbell at mcampbell@arcco.org / 256.536.2884. Sincerely, Adam Williams, PWS & Michelle Campbell Brushy Fork Environmental Consulting, Inc. ARC Environmental, Inc. 5902 Highway 421 South PO Box 190 Mountain City, TN 37683 Brownsboro, AL 35741 adam@bfec.org mcampbell@arcco.org North Carolina Department of Environment and Natural Resources Division of Land Resources Trout Buffer Waiver Supplemental Information The following information should be completed and submitted with respect to the site requiring the buffer waiver. Project Name: Highlands Retail Development Project Owner’s Name: Mr. Glenn Murer – Cashier’s Rd., LLC Address: 35.087006, -83.174499; Junction of U.S. Highway 64 and Cherrywood Drive, Highlands, NC, Macon County, 28741 Consultant’s Name: ARC Environmental, Inc. (Ms. Michelle Campbell) mcampbell@arcco.com Address: P.O. Box 190, Brownsboro, AL 35741 Stream Name: UT to Big Creek Water Class: WS-II;Tr,HQW County: Project Purpose: Commercial Retail Development Total Acres of Land-Disturbing Activity: ~1.31 (ac) Total Acres Disturbed within buffer zone: ~0.13 (ac) Total Length of Stream on Tract: ~415 (ft) Buffer Impacts: Buffer Width Reduction: 0 (ft) Vegetation Trimming: 0 (ft) Channel Piping: 131 (ft) Channel Relocation: 0 (ft) Total Length of Buffer Impact: ~131 (ft) The permanent impact to buffers will be planted riparian vegetation. TROUT WAIVER APPLICATION NARRATIVE Highlands Retail Development Project Project Description: (see Site Plan) The project site is located approximately 3 miles northeast of Highlands, NC at junction of U.S. Highway 64 and Cherrywood Drive 28741, (35.087006°, -83.174499°). The proposed retail development includes a 9,100 square foot building, equipped with a paved parking area and driveway. Proposed total permanent site disturbance is approximately 0.83 acres, including impervious cover (0.72 acres) and septic area (0.11 acres). Two unnamed tributaries of Big Creek, a designated trout stream, are present on the parcel. The tributaries are referred to as UT1 and UT2 and total 415 linear feet. One (1) stream crossing and two (2) new 48” RCP culverts (12 LF and 75 LF) will be installed within the northwest and southeast portion of the unnamed tributaries of Big Creek (UT1 and UT2). Several different locations for stream crossings were evaluated by Broadway Civil Designs of NC, PLLC (BCD); however, the location in the current stream crossing was selected to avoid disturbance of existing septic systems within the southwest portion of the Subject Property and to reduce potential of traffic conflicts. The southwest portion of the site has been evaluated by BCD as the only suitable area for septic installation. This stream crossing was chosen to space intersections at a distance so that inherent roadway complexity would be limited, and safe driving conditions would prevail. NCDOT has permitted the proposed driveway location on Cherrywood Dr. The purpose of the stream crossings and culverts is to provide access from Cherrywood Dr. to the retail site at two (2) locations along the reach: one in the northwest portion of the Subject Property, and the second in the southeast. The unnamed tributary is classified as a WS-II, Tr, HQW waterbody. The goal of this project is to develop a retail site on the Subject Property while minimizing impacts to Waters of the United States and degradation of the surrounding wildlife habitat in which they support. Alternate building and parking lot designs were evaluated and the one presented in the site plan offered the most compact site footprint with least impact. Multiple erosion control and stormwater BMPs are proposed to reduce stream and wetland impacts. During construction, temporary silt fences will be installed around the perimeter of the construction area. Inlet protections will then be installed on all proposed storm inlets. The total area of land disturbance for the project is approximately 1.31 acres total (0.83 acres permanent disturbance). The total stream length disturbed is approximately 131 linear feet of the existing stream channel. Approximately, 0.13 acres and 131 linear feet will be impacted within the trout buffer. The disturbed area upstream and downstream of the proposed driveway crossing will be stabilized with erosion controls (seeding and soil stabilization matting) following construction. Existing vegetation, including established trees and shrubs, will be preserved where possible. Following construction all disturbed areas will be planted with permanent vegetation. Construction Schedule: Construction will begin April 16, 2020 (after April 15) after receiving permit approval. No construction activities will commence during the trout moratorium (October 15 – April 15). Project phasing: 1.Have Utiliquest mark underground utilities; 2.Install culverts and complete any sloping required at the upstream and downstream extents of the two (2) culverts; 3.Install erosion control features (coconut matting, tempor ary/permanent seeding); 4.Permanent planting. Construction is estimated to begin on April 16, 2020 and take approximately 3 months to complete. Erosion and Sedimentation Control: (see Site Plan Set Details) Disturbance in trout buffer will be kept to a minimum duration and shall only take place in conjunction with the culvert, stream crossing, and associated grading. Work will be conducted in the dry utilizing a pump around system referenced in the Intermediate Phase ESPC Plan (Sheet 6) and detailed on Sheet 16 of the site plans. When grading and stabilization operations have ceased work will not resume in these disturbed areas for 5 working days or 7 calendar days, whichever is shorter. These disturbed trout buffer areas will be immediately seeded with a temporary seed mix consisting of annual rye grain and millet. Silt fence, compost sock check dams in indicated channels, as well as coconut coir rolled erosion control product matting will be installed to stabilize the stream buffer within the same day (Sheets 5-8). Following the completion of restoration activities, the banks of the restored channel will be seeded with permanent seed (Ernst Conservation Mix). A broadcast seeding rate of 20 lbs/acre will be used for application of both temporary and permanent seed in disturbed areas. Matting staples will be used to secure the ESPC matting in high stress areas. If a qualifying rain event is expected, temporary stabilization shall be achieved prior to the rain event. Existing woody vegetation outside of the limits of work will be preserved, and not to be damaged in any manner, to minimize project impacts. A planting schedule was included with a list of five (5) shrub species (four (4) of which were identified as species currently existing onsite by ARC Environmental). These species will be planted within disturbed areas of the trout buffer at a density advised by NCDENR Guidelines for Riparian Buffer Restoration, except for the area within the site distance triangle noted on Sheet 10 of the site plans. The site distance triangle will not be planted with shrubs in avoidance of traffic safety concerns, and will be mowed to maintain a vegetative cover under 3 vertical ft. Disturbed areas within the trout buffer will be vegetated to 100% cover and at least 85% density across the site. Precautions will be taken to keep heavy equipment out of the stream channel except where necessary to install stream crossings and culverts. Straw wattles will be used at the periphery of all ingress/egress locations and staging area to entrap particulates from disturbed ground and rock materials. To control the increased discharges due to higher expected runoff rates resultant of impervious surfaces constructed (7% of site to 39.3%), the on-site stormwater will be detained in an underground detention chamber system (Cultec R-150XLHD Isolator Row System) embedded in a gravel bed detailed on Sheet 13 of the site plans. Five (5) grate inlets within the proposed parking lot are proposed to convey stormwater from impervious surfaces onsite to the underground detention chamber system located east of the proposed structure, near the proposed stream crossing on Cherrywood Dr. In order to treat the first inch of stormwater runoff generated from the development, the underground detention system will include a separator row system which will remove 80% of the total suspended solids (TSS) from the stormwater runoff. The separator is wrapped in filter fabric, and the system is designed so that stormwater entering the chambers must flow through the separator row first, before flowing downward and filtering through a gravel bed. Outflow will be controlled using a 6 inch by 6 inch orifice and an 8 inch by 12 inch weir in the outlet control box located near the northeast end of the proposed parking lot. These orifices will force outflow to back up and be stored in the chambers to ensure a higher water quality of discharge. Discharge from the outlet control box will be directed northeast where it will be discharged on the surface, and flow to the wetland areas adjacent to the unnamed tributary to Big Creek. The proposed underground detention system will not discharge directly into any Water of the United States. The outflow will discharge onto a rip-rap apron outside of the buffer area, and drainage will then flow through the undisturbed buffer area into Wetland 2, before being naturally filtered and finally entering the stream. Discharge into wetlands onsite will not produce a further impact than otherwise mentioned in the associated permit. Wetlands act as natural filters of sediment, excess nutrients, and chemicals present in runoff waters by slowing down flow to filter through the soil profile and/or be acquired by existing microorganisms and vegetation inherent in the ecosystem. Mitigation of runoff temperature will be done by the underground detention system explained above. The University of New Hampshire conducted a four-year (4) study (of runoff temperature data for eight (8) different stormwater BMPs in relation to established environmental indicators entitled Examination of Thermal Impacts From Stormwater Best Management Practices. The study mentioned above can be found at the following URL. https://www.unh.edu/unhsc/sites/unh.edu.unhsc/files/progress_reports/UNHSC%20EPAĚ _Thermal_Study_Final_Report_1-28-11.pdf The type of underground detention system selected by BCD was found (in the study) to be the most effective stormwater BMP as it buffers variation in temperature to produce outflows consistent with the average groundwater temperature (47˚(. Project Implementation Notes: 1)No land/stream disturbing activity shall take place within the trout buffer zone during the trout spawning period of October 15 -April 15. 2)Work in the trout buffer zone shall be done in a timely manner, so that duration of disturbance is minimized. Construction sequence and erosion and sediment control BMPs utilized are detailed on Sheets 5-8. 3)All work shall be completed by the end of each day. Work shall be scheduled so that at the end of each day bare ground is not exposed and all disturbed areas including banks shall have adequate temporary or permanent ground cover. 4)Staging area(s) and material stockpiles for this project will be located out of the 25 ft buffer zone when available. 5)All materials shall be on hand before any work is started. All materials must be stored in an orderly manner away from vehicular traffic, near the construction entrance, and away from waterways or storm drains in appropriate containers and/or enclosures. 6)All boulders, debris, excess construction material, and material generated from demolition of existing structures and facilities, or trash are to be removed from the site at the contractor’s expense. 7)The contractor shall repair any damage to the existing street that is c reated during construction activities. 8)Whenever possible stream flow shall be diverted around the work area and equipment shall be operated from the top of the bank. 9)Streamflow exceeding 5 cfs will make pump-around unfeasible. Flow diversion will be utilized in the form of rocks placed to divert direct flow away from each structure area. Precautions will be taken to keep heavy equipment out of the stream channel except where necessary to install bank stabilization/enhancement measures. 10)Coconut coir rolled erosion control product matting shall be installed according to the construction detail shown in the Erosion and Sediment Control Planning and Design Manual. 11)Care will be taken so that the cross-sectional area of the stream is not reduced. 12)This approval does not absolve the permittee from compliance with the surface water quality turbidity standard. More protective erosion and sedimentation control measures may be required in order to comply with this water quality standard. Cashier’s Road, LLC Property Owner’s Address (if different than property above): Proposed Location Copyright (C) 2008, MyTopo 083.1900000° W 083.1900000° W 083.1800000° W 083.1800000° W 083.1700000° W 083.1700000° W 083.1600000° W 083.1600000° W 083.1500000° W 083.1500000° W35.1100000° N35.1100000° N35.1000000° N35.1000000° N35.0900000° N35.0900000° N35.0800000° N35.0800000° N35.0700000° N35.0700000° NSCALE 1:24000 0 1MILE 0 1000 YARDS 0 1 KILOMETER Declination MN 5.55° W MN Location: 035.0876498° N 083.1715373° WName: HIGHLANDS Date: 06/28/19 Scale: 1 inch = 2,000 ft. Copyright (C) 2008, MyTopo Datum: NAD27 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236Commercial Real Estate Development 216 Westside Square • Huntsville, AL 35801 Phone: (256) 533-7287 • Fax: (256) 533-7236 The Group Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 Broadway Civil Designs of NC, PLLC216 Westside Square • Huntsville, AL 35801Phone: (256) 533-7287 • Fax: (256) 533-7236 PHOTOSHEETSPHOTOSHEETSRETAIL DEVELOPMENT SITEHIGHLANDS, NCPHOTOS TAKEN 6/25/2019 UT1UT1 Two views of UT1 facing downstream (northwest) from road crossing. View southeast as UT1 emerges from culvert underView south across UT1 through heavy brush Hwyemerges from culvert under Cashiers Rd (Hwy 64).through heavy brush. Hwy 64 visible in background. A dense canopy of vegetation is present everywhereA dense canopy of vegetation is present everywhere except the uppermost reaches of UT1. Stick and rock caddisflycases UT1 is up to 3 ft deep in areas. 4 ft ywere observed on pieces of wood and rocks in UT1.ppsoil augur is shown for comparison with blue line marking water level. 18” culvert feeds into UT1 near downstream extent of property. Although a small pool was present at culvertproperty. Although a small pool was present at culvert outlet flow was stagnant. UT2UT2 View downstream (northeast) from upperportion of UT2.()ppp View downstream along UT2 showing sandy bottom and defined bed and banks. W1UT2At its downstream extent UT 2 is bordered by peripheralAt its downstream extent UT 2 is bordered by peripheral wetlands on stream left. Two views to northeast of culvert at downstream end of UT2 Culvert isTwo views to northeast of culvert at downstream end of UT2. Culvert is rusted out and water is flowing under/around as well as through culvert. CENTRAL PHOTOSCENTRAL PHOTOSPHOTOS TAKEN FROM CENTER OF PROPERTYPHOTOS TAKEN FROM CENTER OF PROPERTY Photo at center of property facing northwest. Photo at center of property facing northeast. Photo at center of property facing east toward Cashiers Rd. Photo at center of property facing southeast toward Cashiers RdPhoto at center of property facing southeast toward Cashiers Rd. Photo at center of property facing southwest cornerPhoto at center of property facing southwest corner. Photo at westerncentral portion of property facingPhoto at western-central portion of property facing Northwest. Old asphalt in central portion of property. Hydrophytict tib d tl i thi d t i ivegetation grows abundantly in this area due to imperviousand/or compacted surfaces collecting stormwater runoff. Photo in western wooded area of subject property facing northwestPhoto in western wooded area of subject property facing northwest. Photo in western wooded area facing southwestPhoto in western wooded area facing southwest.