Loading...
HomeMy WebLinkAbout20010556 Ver 1_COMPLETE FILE_20010416O?O? W A T ?RpG r O ? Michael F -Easley Governor William G. Ross, Jr., Secretary Department of Environment and Natural Resources Kerr T. Stevens Division of Water Quality May 15, 2001 Mr. Greg Jennings NC State Stream Restoration Institute Box 7625 Raleigh, NC 27695-7625 Subject: Stream Restoration Shawneehaw Creek Avery County, NC DWQ# 010556 Dear Mr. Jennings: This Office is in receipt of the plans for the stream restoration project of a specified length of the Shawneehaw Creek prepared submitted to the Division on March 16, 2001. Staff from the Wetlands Unit reviewed the plans and found that they meet the definition of stream bank restoration and do not require a formal application as specified in the Water Quality Certifications 3258 for USACE Nationwide Permits No. 27. If you have any questions regarding this matter, please contact Mr. Todd St. John at (919) 733-9584. qetSierell R. Dorney nds Unit Superviso cc: Mr. Todd St. John, Wetlands Unit Asheville Regional Office File North Carolina Division of Water Quality, 401 Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address) 2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location) (li(1 - 1100 /.. L.......? - -11C -1 I{....\ 1. a?... l/L. ry.. ,,,,-..?..?....,...../......... ?I.....J..l Will C;unliim St;iln Hoiw city is a land gmflt univni;ity;ind o constituent institution of The Uoivw.sily of Noith C;iiohna Department of Biological and Agricultural Engineering Box 7625 Raleigh, NC 27695-7625 919.515.2675 919.515.6772 (fax) 010556 Apri 1 12, 2001 r' (r, ire' ? If it To: David Baker, US Army Corps of Engineers Todd St. John, NC Division of Water Quality Cl 620pl Ron Linville, NC Wildlife Resources Commission Steve Bevington, NC Clean Water Management Trust Fund ,? ^71Eiti r.u GRCUP Linda Johnson, Town of Banner Elk' Mike Pitman, NC Cooperative Extension Service - Avery County From: Greg Jennings, NC State University J?? , Re: Permit Application for Shawneehaw Creek Phase II Enhancement Project Please find enclosed a completed Pre-Construction Notification (PCN) Application Form and a stream enhancement design for Shawneehaw Creek in the Town of Banner Elk in Avery County. The purpose of the project is to improve water quality and aquatic habitat by reducing sedimentation; to improve stream stability; and to improve riparian and floodplain functionality of 800 feet of Shawneehaw Creek on Banner Elk Town property. The project meets the DWQ definition of stream restoration and therefore a permitting fee is not included with this package. The project is funded by the NC Clean Water Management Trust fund through a grant to North Carolina State University. This is not a stream mitigation project. If you have questions about this project, please contact Greg Jennings at 919-515-6771. Enclosure ? , ? ? ? No 'vod ?r01 Apr 09 01 11:33a ELK, n0? ao ' y u. > \ 0 \S 9i1 Town of Banner Elk Mayor Deka Tate, Council Members Brenda Lyerly, Joe B. Perry, Floyd Ramsey, Jack Masters, James Beasley F April 9, 2001 Mr. Greg Jennings NC State University Box 7625 Raleigh, NC 27695-7625 Dear Mr. Jennings: This letter serves to authorizc you to act as the Town of Banner Elk's agent and complete the ACOE/DWQ Pre-construction forms for the Shawneehaw Phase II construction. If you should need anything further, please let me know. Sincerely, Linda Johnson Interim Manager p.2 PO Box 2049, 200 Park Avenue, Banner Elk, NC 28604 Phone: (828) 898-5398, FAX (828) 898-4568, Website: townuibaimerelk.org ?W A TFRQ O 6 6? r o -c Pre-Construction Notification (PCN) Application Form For Section 404 and/or Section 10 Nationwide, Regional and General Permits, Section 401 General Water Quality Certifications, and Riparian Buffer and Watershed Buffer Rules This form is to be used for projects qualifying for any of the U.S. Army Corps of Engineers' (USACE) Nationwide, Regional or General Permits as required by Section 404 of the Clean Water Act and/or Section 10 of the Rivers and Harbors Act, and for the North Carolina Division of Water Quality's (DWQ) associated General 401 Water Quality Certifications. This form is also to be used for any project requiring approval under any Riparian Buffer Rules implemented by the N.C. Division of Water Quality. This form should not be used if you are requesting an Individual 404 Permit or Individual 401 Water Quality Certification. The USACE Individual Permit application form is available online at http://www.saw.tisace.,irmy.niiI/wetlands/Perm app.htm. The USACE is the lead regulatory agency. To review the requirements for the use of Nationwide, Regional or General permits, and to determine which permit applies to your project, please go to the USACE website at http://www.saw.usace.army.niiI/wetlands/regtour.htni, or contact one of the field offices listed at the end of this application. The website also lists the responsible project manager for each county in North Carolina and provides additional information regarding the identification and regulation of wetlands and waters of the U.S. The DWQ issues a corresponding Certification (General or Individual), and cannot tell the applicant which 401 Certification will apply until the 404 Permit type has been determined by the USACE. Applicants are encouraged to visit DWQ's 401/Wetlands Unit website at http://h2o.enr. state.ne.us/ncwetlands to read about current requirements for the 401 Water Quality Certification Program and to determine whether or not Riparian Buffer Rules are applicable. The applicant is also advised to read the full text of the General Certification (GC) matching the specific 404 Permit requested. In some cases, written approval for some General Certifications is not required, provided that the applicant adheres to all conditions of the GC. Applicants lacking access to the internet should contact DWQ's Central Office in Raleigh at (919) 733-1786. Trout Waters Coordination - Special coordination with the North Carolina Wildlife Resources Commission (NCWRC) is also required for projects occurring in any of North Carolina's twenty-five counties that contain trout waters. In such cases, the applicant should contact the appropriate NCWRC regional coordinator (listed by county on the last page of this application). Page 1 of 12 CAMA Coordination - If the project occurs in any of North Carolina's twenty coastal counties (listed on the last page of this application) the applicant should also contact the North Carolina Division of Coastal Management (DCM) at (919) 733-2293. DCM will determine whether or not the project involves a designated Area of Environmental Concern, in which case DCM will act as the lead permitting agency. In such cases, DCM will require a Coastal Area Management Act (LAMA) Permit and will coordinate the 404/401 Permits. USACE Permits - Submit one copy of this form, along with supporting narratives, maps, data forms, photos, etc. to the applicable USACE Regulatory Field Office (addresses are listed at the end of this application). Upon receipt of an application, the USACE will determine if the application is complete as soon as possible, not to exceed 30 days. This PCN form is designed for the convenience of the applicant to address information needs for all USACE Nationwide, Regional or General permits, as well as information required for State authorizations, certifications, and coordination. Fully providing the information requested on this form will result in a complete application for any of the USACE Nationwide, Regional or General permits. To review the minimum amount of information that must be provided for a complete PCN for each USACE Nationwide permit, see Condition 13, 65 Fed.Reg. 12893 (March 9, 2000), available at llttp•//www Saw Llsace.arniYmi1/wetlands/nwpIinalFedRe?,,.pdf. Processing times vary by permit and begin once the application has been determined to be complete. Please contact the appropriate regulatory field office for specific answers to permit processing periods. 401 Water Quality Certification or Buffer Rules - All information is required unless otherwise stated as optional. Incomplete applications will be returned. Submit seven collated copies of all USACE Permit materials to the Division of Water Quality, 401/Wetlands Unit, 1650 Mail Service Center, Raleigh, NC, 27699-1650. If written approval is required or specifically requested for a 401 Certification, then a non-refundable application fee is required. In brief, if project impacts include less than one acre of cumulative wetland/water impacts and less than 150 feet cumulative impacts to streams, then a fee of $200 is required. If either of these thresholds is exceeded, then a fee of $475 is required. A check made out to the North Carolina Division of Water Quality, with the specific name of the project or applicant identified, should be stapled to the front of the application package. For more information, see the DWQ website at litty://li2o.ehnr.state.nc.us/ncwetlands/fees.htni1. The fee must be attached with the application unless the applicant is a federal agency in which case the check may be issued from a separate office. In such cases, the project must be identifiable on the U.S. Treasury check so that it can be credited to the appropriate project. If written approval is sought solely for Buffer Rules, the application fee does not apply, and the applicant should clearly state (in a cover letter) that only Buffer Rule approval is sought in writing. Wetlands or waters of the U.S. may not be impacted prior to issuance or waiver of a Section 401 Water Quality Certification. Upon receipt of a complete application for a 401 Certification, the Division of Water Quality has 60 days to prepare a written response to the applicant. This may include a 401 Certification, an on-hold letter pending receipt of additional requested information, or denial. Page 2 of 12 Office Use Only: Form Version April 2001 010556 USACE Action ID No. DWQ No. If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. 1. Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Section 10 Permit ® 401 Water Quality Certification ? Riparian or Watershed Buffer Rules 2. Nationwide, Regional or General Permit Number(s) Requested: NW 27 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? _ 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII - Mitigation); check here: ? II. Applicant Information 1. Owner/Applicant Information Name: Town of Banner Elk Linda Johnson Interim Manager Mailing Address: PO Box 2049, 200 Park Avenue Banner Elk. NC 28604 Telephone Number: 828-898-5398 E-mail Address: Fax Number: 828-898-4568 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Grep Jenninas Company Affiliation: North Carolina State University Mailing Address: Box 7625 NCSU Telephone Number: 919-515-6771 Fax Number: 919-515-6772 E-mail Address: greg ienningsnncsu edu Page 3 of 12 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: Shawneehaw Phase II Stream Enhancement 2. T.I.P. Project Number (NCDOT Only): N/A 3. Property Identification Number (Tax PIN): _ 4. Location County: Avery Nearest Town: Banner Elk Subdivision name (include phase/lot number): N/A Directions to site (include road numbers, landmarks, etc.): Banner Elk Town Park located south of Highway 194 and east of Highway 184 in Banner Elk adjacent to the Banner Elk Town Hall. 5. Site coordinates, if available (UTM or Lat/Long): Lat/Long 36 09 30 / 81 52 20 (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or condition of the site at the time of this application: Open field owned by the Town of Banner Elk intended for future recreational field. 7. Property size (acres): 8. Nearest body of water (stream/river/sound/ocean/lake): Shawneehaw Creek 9. River Basin: Watauga River Basin (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at llttp://li2o.enr.state.nc.us/admin/maps/.) Page 4 of 12 10. Describe the purpose of the proposed work: To improve water quality and aquatic habitat by reducing sedimentation; improve stream stability; and improve riparian and floodplain functionality. This is not a mitigation protect. 11. List the type of equipment to be used to construct the project: Trackhoe Excavator; Loader; Dump Truck; Hand Labor. 12. Describe the land use in the vicinity of this project: Town Park-, Playground. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. V. Future Project Plans Are any additional permit requests anticipated for this project in the future? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application: N/A VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream Page 5 of 12 mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Wetland Impacts Wetland Impact Site Number (indicate on ma) Type of Inpact* Area of Impact (acres) Located within 100-year Floodplain** (es/no) Distance to Nearest Stream (linear feet) Type of Wetland*** * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, tin, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at http://w"w.feina.FYov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: N/A Total area of wetland impact proposed: N/A 2. Stream Impacts, including all intermittent and perennial streams Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? ( leases eci ) Phase II Stabilization 800 Shawneehaw 18 ft Perennial * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditch ing/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at www.tlsgs.gov. Several intemet sites also allow direct download and printing of USGS maps (e.g., wwwjopozone.cont, www.mapqucst.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 800 Page 6 of 12 3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) (if Name applicable) Wat) Type of Waterbody (fake, pond, estuary, sound, bay, ocean, etc.) List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging, flooding, drainage, bulkheads, etc. 4. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The project will enhance stream stability by protecting streambanks providing grade control improving bed features and reducing sediment concentrations in the stream. Stream impacts during construction will be minimized by working from the streambank and limiting ground disturbance to only those areas in the immediate vicinity of instream structures. Page 7 of 12 VIII. Mitigation DWQ - In accordance with 15A NCAC 211 .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetiands/strinride.litm1. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. N/A Page 8 of 12 Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required Mitigation 1 3 2 1.5 Total Zone 1 extends out 30 feet perpendicular from near oanK or channel; /-one z extenas an additional 20 feet from the edge of Zone I . If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 213 .0242 or .0260. XI. Stormwater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. No impervious acreage existing or proposed for this project XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. N/A XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules? Yes ? No K Is this an after-the-fact permit application? Yes ? No Pi Page 10 of 12 XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). Applicant/Agentcsig f,ature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) US Army Corps Of Engineers Field Offices and County Coverage Asheville Regulatory Field Office Alexander Cherokee Iredell Mitchell US Army Corps of Engineers Avery Clay Jackson Polk 151 Patton Avenue Buncombe Cleveland Lincoln Rowan Room 208 Burke Gaston Macon Rutherford Asheville, NC 28801-5006 Cabarrus Graham Madison Stanley Telephone: (828) 271-4854 Caldwell Haywood McDowell Swain Fax: (828) 271-4858 Catawba Henderson Mecklenburg Transylvania Raleigh Regulatory Field Office Alamance Durham Johnston Rockingham US Army Corps Of Engineers Alleghany Edgecombe Lee Stokes 6508 Falls of the Neuse Road Ashe Franklin Nash Surry Suite 120 Caswell Forsyth Northampton Vance Raleigh, NC 27615 Chatham Granville Orange Wake Telephone: (919) 876-8441 Davidson Guilford Person Warren Fax: (919) 876-5283 Davie Halifax Randolph Wilkes Washington Regulatory Field Office Beaufort Currituck Jones US Army Corps Of Engineers Bertie Dare Lenoir Post Office Box 1000 Camden Gates Martin Washington, NC 27889-1000 Carteret* Green Pamlico Telephone: (252) 975-1616 Chowan Hertford Pasquotank Fax: (252) 975-1399 Craven Hyde Perquimans Wilmington Regulatory Field Office Anson Duplin Onslow US Army Corps Of Engineers Bladen Harnett Pender Post Office Box 1890 Brunswick Hoke Richmond Wilmington, NC 28402-1890 Carteret Montgomery Robeson Telephone: (910) 251-4511 Columbus Moore Sampson Fax: (910) 251-4025 Cumberland New Hanover Scotland Pitt Tyrrell Washington Wayne Union Watauga Yancey Wilson Yadkin *Croatan National Forest Only Page 11 of 12 US Fis US Fish and Wildlife Service Raleigh Field Office Post Office Box 33726 Raleigh, NC 27636-3726 Telephone: (919) 856-4520 h and Wildlife Service / National N US Fish and Wildlife Service Asheville Field Office 160 Zillicoa Street Asheville, NC 28801 Telephone: (828) 665-1 195 urine Fisheries Service National Marine Fisheries Service Habitat Conservation Division Pivers Island Beaufort, NC 28516 Telephone: (252) 728-5090 North Carolina State Agencies Division of Water Quality 401 Wetlands Unit 1650 Mail Service Center Raleigh, NC 27699-1650 Telephone: (919) 733-1786 Fax: (919) 733-9959 Division of Water Quality Wetlands Restoration Program 1619 Mail Service Center Raleigh, NC 27699-1619 Telephone: (919) 733-5208 Fax: (919) 733-5321 CAMA and NC Coastal Counties State Historic Preservation Office Department Of Cultural Resources 4617 Mail Service Center Raleigh, NC 27699-4617 Telephone: (919) 733-4763 Fax: (919) 715-2671 Division of Coastal Management Beaufort Chowan Hertford Pasquotank 1638 Mail Service Center Bertie Craven Hyde Pender Raleigh, NC 27699-1638 Brunswick Currituck New Hanover Perquimans Telephone: (919) 733-2293 Camden Dare Onslow Tyrrell Fax: (919) 733-1495 Carteret Gates Pamlico Washington NCWRC and NC Trout Counties Western Piedmont Region Coordinator Alleghany Caldwell Watauga 3855 Idlewild Road Ashe Mitchell Wilkes Kernersville, NC 27284-9180 Avery Stokes Telephone: (336) 769-9453 Burke Surry Mountain Region Coordinator Buncombe Henderson Polk 20830 Great Smoky Mtn. Expressway Cherokee Jackson Rutherford Waynesville, NC 28786 Clay Macon Swain Telephone: (828) 452-2546 Graham Madison Transylvania Fax: (828) 506-1754 Haywood McDowell Yancey Page 12 of 12 Shawneehaw Creek Stream Enhancement Plan Phase II Prepared For: Watauga River Basin Nonpoint Source Team NC Clean Water Management Trust Fund March 2001 Prepared By: r Gregory. Jenni gs, P .D., P.E. Associate Professor, North Carolina State University Dam Wise-Frederick, NCSU Karen Hall, NCSU Mike Pitman, NCSU INTRODUCTION The project site is an 800-ft reach of Shawneehaw Creek with a 3-square-mile watershed located in Banner Elk, NC (Figures 1 and 2). This project is a continuation of Phase I which enhanced 860 feet of Shawneehaw Creek immediately upstream from Phase 11 and was completed in 2000- 2001. Components of Phase I included installation of 6 boulder cross vanes and 20 root wads, streambank grading, and planting of the riparian corridor. Both projects are located in a Park owned by the Town of Banner Elk. Shawneehaw Creek is a tributary to the Elk River and the Watauga River. Water quality concerns in the Watauga River Basin include sedimentation from streambank erosion and loss of habitat resulting from poor riparian vegetation and channel alterations. Project goals are to: (1) improve water quality and aquatic habitat by reducing sedimentation; (2) improve stream stability; and (3) improve riparian and floodplain functionality. These goals will be met by implementing a natural channel design that enhances the channel's dimension, pattern and profile to a natural, stable form. EXISTING CONDITION The project reach is 800 feet long and includes both sides of the stream. The stream is located in a wide alluvial valley in the Mountain physiographic region. The stream channel has been straightened and moved to the edge of the valley. There is a steep vegetated hillslope beyond the right streambank of most of the reach. Just beyond the left streambank is a sewer line following the entire length of the project reach. The alluvial valley and floodprone area is located beyond the left streambank and extends approximately 300 feet to the next hillslope. The project reach is classified as a C4 Rosgen Stream Type with bank height ratios near 1.0. Previous channelization and buffer removal has caused moderate channel widening and some bank instabilities. Streambank erosion is moderate along the project reach. Channelization has also caused a significant loss of pools. The bedforms are mostly riffles and runs. The riparian area is predominantly grass with few trees and little shade over the stream. BANKFULL VERIFICATION Bankfull stage is the top of the streambank for this reach. The reach is located on a flat alluvial floodplain and contains bedrock which maintains the grade and prevents downcutting. The cross sectional areas measured in the field are shown in Figure 3 in relation to the NC Mountain Regional Curve. The measured bankfull cross section areas are lower than would be expected on the regional curve because of the extensive forested areas in the watershed and the lack of channel incision observed in this reach. I `l IL V ? W U ? 3 ? cd ct 4-1 U N O ,.L w r j r f ?% t V1,,0 in 1?i i 0 C? ? U 42 0 0 U I s r.. OL M cli NC Rural Mountain Regional Curve Z 1000 Cr a` W 100 N X Y c co m 10 0000 - - -- - -- - -- - - _- ? Regional Curve Data - - -- - - - - - - - - - - ¦ XSEC 0+97 ? XSEC 5+08 FI I I I F XSEC 6+33 1 10 100 1000 y = 21.61 x068 Drainage Area (sq mi) R2 = 0.89 Figure 3. Shawneehaw Creek Phase II Bankfull Cross-Section Areas in Relation to the NC - Mountain Regional Curve. REFERENCE REACH ANALYSES Basin Creek was selected as the reference reach for this project because of its close proximity and similar stream type. Basin Creek is located along the Blue Ridge escarpment and is the headwaters of the Yadkin River. The USDA Natural Resources Conservation Service, the NC Stream Restoration Institute and graduate students in the Department of Biological and Agricultural Engineering conducted three separate reference reach surveys. The reference reach values and ratios are shown on the design table in the Appendix. NATURAL CHANNEL DESIGN The plan view of the natural channel design is shown in Figure 4 with design parameters listed in Appendix 2. Overall, the dimension, pattern, and profile of the project reach are moderately stable with a vegetated riparian buffer on the right side and some diversity of riffle and pools. However, the lack of riparian buffer on the left side and the close proximity of the hillslope in the middle of the reach have caused localized instabilities. The design approach includes installing cross vanes, stabilizing the eroding streambanks, and installing a bankfull bench near station 5+00 to reduce streambank erosion. The bankfull bench along the right streambank will be approximately 10 feet wide with the toe of the bank stabilized with root wads and two rock vanes. The top of the bankfull bench will be planted with a variety of native species. Seven cross vanes will be constructed to protect streambanks, narrow the channel width, enhance pool habitat, and provide grade control. Root wads will be installed along the outside of meander bends to improve streambank stability and fish habitat. 2 tiv T/� � X'�.7( ` �i•• t��d q�p� f�3i•,�s�� ��iJ,ir:.�:a.t,Y e, �� Ir SP �1` / � •. � ,t,a..K .`)yam f : 1 -..s. a4 r ff R. t; i I � tiv T/� � X'�.7( ` �i•• t��d q�p� f�3i•,�s�� ��iJ,ir:.�:a.t,Y e, �� Ir SP �1` / � •. � ,t,a..K .`)yam f : 1 -..s. A 25-ft riparian buffer will be established from the top of the streambank. Live cuttings of black willow and silky dogwood will be staked along each meander bend. A combination of native herbaceous and woody vegetation will be established in the riparian buffer. Permanent seeding will include native grasses and woody vegetation. Temporary vegetation for erosion control will include annual rye (cool season) or millet (warm season) depending on the construction schedule. The existing tree buffer along the right bank will be maintained in its current condition. SEDIMENT TRANSPORT A stable stream has the capacity to move its sediment load without aggrading or degrading over time. The total load of sediment can be divided into bedload and suspended load. Suspended load is normally composed of fine sand, silt and clay particles transported in the water column. Bedload is transported by rolling, sliding, or hopping (saltating) along the bed. The movement of sediment particles depends on the energy of the stream and their physical properties. Grain size has a direct influence on the mobility of a given particle. Critical dimensionless shear stress (i*,i) is a measure of the force required to move a given size particle resting on the channel bed. It can be calculated for a gravel-bed stream using a surface and subsurface particle sample from a representative riffle in the reach. -0.873 T *C; = 0.083 [Equation 1] d50 Where, i*C; = critical dimensionless shear stress d; = median particle size of riffle bed surface (mm) c15o = median particle size of subsurface sample (mm) Critical dimensionless shear stress can then be used in the following equation to predict the minimum water depth required to move the d84 of the pavement sample. The water depth is calculated by: Dcr = 1.65z *,i d 84 ,,b [Equation 2] 5 Where, Dcr = water depth (ft) T*C; = critical dimensionless shear stress d84,ub = d84 of subpavement sample (ft) s = average channel slope (ft/ft) Critical dimensionless shear stress was calculated for Shawneehaw Creek on a pavement/subpavement analysis conducted near station 4+00. The d50 of the pavement sample was 6.5 mm, and d50 for the subpavement was 15 mm. Using Equation 1, the critical dimensionless shear stress = 0.04. To find the depth of water necessary to move the d84 of the pavement sample (=90 mm), Equation 2 was used. A critical depth of 1.1 ft was calculated. This means that at a water depth of 1.1 ft in the design channel, particles up to 90 mm in size would be mobile. The mean bankfull depth for the proposed restoration design is 1.5 ft. Therefore, the design channel would be able to transport the materials without aggrading. As a check, boundary shear stress was calculated for the design dimension and compared with Shields Curve. The shear stress placed on the sediment particles is the force that entrains and moves the particles, given by: z = yRs [Equation 3] Where, T = shear stress (lb/ftz) Y = specific gravity of water (62.4 lb/ft) R = hydraulic radius (ft) s = average channel slope (ft/ft) If the shear stress is determined from the Shield's diagram to move a particle size that is significantly larger or smaller than the d84 of the pavement sample, then the sinuosity may need to be increased or decreased respectively, in order to adjust the average channel slope, thus adjusting the shear stress. Boundary shear stress was calculated for the design using Equation 3, and equaled 0.82 lbs/ftz. From Shields diagram (Figure 5), this shear stress value would be able to move a particle size of approximately 60 mm. 1000 100 E E d E 10 0w c 'm I C7 1 0.1 0.001 0.01 0.1 1 10 Critical Shear Stress (lbs/sgft) Figure 5. Shield's Curve 4 CONSTRUCTION Construction Materials Estimate Item Quantity Units Description Boulders 500 TONS 6ft X 4ft X 3ft Root Wads 30 See Appendix Erosion Mat 2000 SQ FT C125BN Rye rain 400 LBS Apply at 130 Ibs/ac Fertilizer 1200 LBS Apply at 435 lbs/ac Mulch 50 BALES Apply at 130 bales/ac The following equipment is mandatory for the project: • Track hoe with a hydraulic thumb. • Track loader • Chain saws • All other equipment and materials necessary to complete the job as described 0-0 1-4 a c? a 3 as a? C 3 ea C O C E A C O VJ iOr U C bA A ? ? o 0 0 0 0 0 0 a ? oo ? o ?n ry ? ? ca wp ` o g °o O g N N o A ? e+'i N cV --+ ri --+ N M N ?O N to C,, C w to ? N V) O ?O N V.) N M c\ N N N ? r? N -? -+ c?. O ? ? O ? O O -- .Q O t- v) O N (` G1 O Q M N M N M N M a Ems' p V U U U U U U 0 0 4. w x x o, x ?Tw O •L to . •.; bp , •Z +4 • CJ 1. l..l U 'X N •K N 'K W W Q W Q 0 U y c u C O M a a o ? II tn .1 w Q¢`""A ? ? 3 0 0 cl p- ?4 II II w n II a `a~ x Q 3 w I? ^ ^ w w O c1 ? ? R Q ^ o s a 0 v) Q Q G O b c? b U 3 3 w ::3 .?G G aC w II w II II -? e 3 A ? Design Parameters * hidicates No Data Available Shawneehaw Phase II Parameter Design Existing Reference Reach Name Shawneehaw Shawneehaw Basin Cr Bankfull XSEC Area, Abkf (ft) 30.0 26.0 57.4 Bankfull Width, Wbkf (ft) 20.0 22.0 30.7 Bankfull Mean Depth, Dbkf (ft) 1.5 1.2 1.9 Width to Depth Ratio, W/D (ft/ft) 13.3 18.6 16.4 Entrenchment Ratio, Wfpa/Wbkf (ft/ft) 4.5 4.5 2.8 Bank Height Ratio, Dtob/Dmax (ft/ft) 1.0 1.0 1.0 Min Bkf Max Depth, Dmax (ft) 2.1 1.3 --- Min Bkf Max Depth, Dmax (ft) 3.3 2.6 --- Min Bkf Max Depth Ratio, Dmax/Dbkf 1.4 1.1 1.2 Max Bkf Max Depth Ratio, Dmax/Dbkf 2.2 2.2 2.2 Min Meander Length, Lm (ft) 100 80 --- Max Meander Length, Lm (ft) 200 230 --- Min Meander Len Ratio, Lm/Wbkf 5.0 3.6 8.0 Max Meander Len Ratio, Lm/Wbkf 10.0 10.5 11.0 Min Radius of Curvature, Re (ft) 50 32 --- Max Radius of Curvature, Rc (ft) 100 125 --- Min Rc Ratio, Rc/Wbkf 2.5 1.5 2.4 Max Rc Ratio, Rc/Wbkf 5.0 5.7 4.2 Min Belt Width, Wblt (ft) 60 55 --- Max Belt Width, Wblt (ft) 100 90 --- Min MW Ratio, Wblt/Wbkf (ft) 3.0 2.5 3.5 Max MW Ratio, Wblt/Wbkf (ft) 5.0 4.1 4.0 Sinuosity, K 1.3 1.20 1.02 Valley Slope, Sval (ft/ft) 0.0132 0.0132 --- Channel Slope, Schan=Sval/K (ft/ft) 0.0101 0.0109 --- Pool Slope, Spool (ft/ft) 0.0003 0 --- Pool Slope Ratio, Spool/Schan 0.03 0.00 0.05 Min Pool Depth, Dpool (ft) 3.0 2.3 --- Max Pool Depth, Dpool (ft) 4.2 3.7 --- Min Pool Depth Ratio, Dpool/Dbkf 2.0 1.9 1.6 Max Pool Depth Ratio, D ool/Dbkf 2.8 3.1 2.6 Min Pool Width, Wpool (ft) 22.0 21 --- Max Pool Width, Wpool (ft) 28.0 25 --- Min Pool Wid Ratio, W ool/Wbkf 1.1 1.0 1.3 Max Pool Wid Ratio, Wpool/Wbkf 1.4 1.1 1.5 Min Length Pool Spacing, Lps (ft) 80 82 --- Max Length Pool Spacing, L s (ft) 140 165 --- Min Pool Spacing Ratio, Lps/Wbkf 4.0 3.7 5.0 Max Pool Spacing Ratio, Lps/Wbkf 7.0 7.5 8.0 C'J G cz o Q ? O O 00 O O O O O O O u U r--+ Q O O M O O N O O O 00 O O ? ? 0000 (13) uoiILInalg bA •; , GA W (? 1?1 3 a? Q) 3 C/) u 4•. FLI O M O U U X f a 4 e a a r J eo" r r i E N r? O C*? 00 O O O C? O? O? (1j) UOIIUAO[g 0 c? O 00 O U Q O O N a? W Q B B O M O N O ?a a ° a O O U -' + Q 3 ? M U r- `? ? ? Q O O O^ V C\ oo r- ? ? M N ?--i (1j) UOIWAaiq ..... ...... ...... ...... ...... ...... ...... ...... ...... ...... ............ ...... ...... ...... ...... e i i B • • M • • . dr • • D A A A ? A an •?, tw CIO) W Q B a O 00 O b U M .L; 3 a? U Q 3 U O A M M U U t i t O 110 a? U Q O O O M [- ?10 in -?t M O C? Q\ C? G\ Q\ C\ CN CN (1j) UOtIE'naig 0-0 0-I a 3 a a C 3 n41 C d .r c 0 O U v .a a "o 0 0 O CN 8 v N a W 1,0 - Q kn M Q O V1 Q ? 00 Q kn C? Q C bA O O ?? ? M --i ? pl O v't X N 0 0 ?D "'' A O O C N N ! _ G1 ~ O W) N O O O 0 N O O p W 0 0 Q n ? 3 Q 3 x ? y b b b ? b b Q C O cC C v Ct3 V 0 n C CC it H C 6r b G1 O N N G1 M " o0 N ?O d ^- ?D ^- N M M d O b --? M M M v ) vl \0 \O t- t- 00 00 C1 G1 G1 C\ C1 .--? U kn w) N tr) O rt v-) M t- v1 v) - - O ?O O t, a? v) kn N N O kn V V) M t-- kn to .-- - O ^+ ?D O C z V te ? ? r 1 r ' U k'r? . f•.? 17 ?. ^ i? ny r so `D N In v O O O O t? O M O ?O N v ?t O 0o O ?O N N d N C) v N N in ^i C`l vi 00 i N 00 v'1 \O - 0 O O O N N O O O O O O O O O 1-4 b c a o 3 U Ct ? U 3 a N o U ct a 1-4 0 I?? I I I I I I I t o 0 0 0 0 0 0 0 0 0 0 0° O G1 00 l? ?O M N --? o/. anpeinwnD a? c? a 3 a? a? a 3 c? U b a u 00 o o M ° °o w 0 3 n t E- ? c o 0 0 0 0 a C11 O It N N a o a cn u p c 0 0 0 0 ? v? 0 0 0 0 c. O u cis w o M 0 M 0 M 0 M 0 M 7 O O O O O v d A o 0 0 0 0 `. M O O M M x ?. o v a N O O I? N M c , z ? *04 b w CIS w 0 z 0 0 0 U b ? 00 O w D O a U a 0 w d F a? G G W w O 0 U T d a? b G 4=. N .b cs a? cy 3 bA c a? 3n x 0 z 0 Z-15 a) CD . I I ?I ?I I T 0 I of N I ?I n m m E c I o I 3 ca m' .o E I / / // i m m C o m CL 0 uoiIOas ssoaO peM 1oo? leoid?C1 ?€ m ? N (866? 'ua6so? wad paldepy) ? co , co T'- ? o (n rn N to IlnijUes O N U r^ ?. a ? s rn se 0 .C o C: Ch U v v -X w O oO i "0 LL 0 75 > J < <„? g a LL m € III it j J'? i IInPWee III Z 'CIO ?, ?zlll?lll ,,- . tlt v ?' ?' l?llll?ll ?J tl\I o v / mm m J E II J m a III-.- ;III. ; III g m Ili ?' m W N /II u 5isaa auen ssoaO leoid 1 0? ?? ° (9661, 'ua6soa wo?? pa?depy) co v ?, o co E .tm I l , l \ m %III? I?I?III ; il\, III` IIII?I? I I I ? I I\I j I\\?I, III?I\ ;,`, mc?l\I?? ? 8 I?II,? I/ =?II? w c z I I VI I I z ?.= 5i I I Ilil J ° I%I II! ° II? Jul ?. II%'I?!I j can r lillu ?I I v m ? •? II c II II ? I?JJII E II ? ? , i a?II??IL? III co m m o S' ? ?III?I 3 U05 M o a o -? 0 3 _ Q N Y z m m C r? Z c cu L) CL L 2 ° w C vai ° d ? Z ? ? N `m .r3 co +?+ ^ C U O r0 cC ?L ?L Z ' C ` v - 0 _0 Y 8 d r1 r 41 o m ` Z Z C. o c cu c ? ? rn N Q au?n ?aaid?C l u?is Q ? 12 ? O a C/) CD CY) I m ?ull::i'il c I j?1fII \ ? ?JII?II II \\IIII illll?lll III ? ICI ? %Illi I III ", III 11 8 8 I?I? , ?? m??llali " IiI?J ?u II III?I ' , I?Iikill ? I ICI lug All -2 ??' ?- II ?I Jd '' II ? ?JJII? II ?' ? I I ITI%?I??iil II ?N I CD ? II M / C \ . 1. m O m w g II I III •M m E illl a N a Y' 0 N ?i •--' C a `? ? ? i w 1 ?` ^ co 0 L) N p > e N (n r C C N •D N -D ` O v fN Y .Y U M O O d O m Z N N , (866 ? 'ua6so? wad pa?depy) m € ? E CD co ? ? u?isaD n? H aua oo f? 1aaid?C 1 o ? ?? ? Re: Shawneehaw Creek Subject: Re: Shawneehaw Creek Date: Wed, 25 Apr 200109:19:19 -0400 From: Greg Jennings <Greg_Jennings@ncsu.edu> Organization: NC State University To: "Todd St. John" <todd.stJohn@ncmail.net> CC: Mike Parker <mike.parker@ncmail.net> Todd, 1) Basin Creek Drainage Area = 6.8 square miles 2) The plan you requested is slide 3 of the attached powerpoint file. Please contact me if you have any questions about this. Thanks, Greg "Todd St. John" wrote: > i sent this earlier, but to the wrong address... sorry. > Shawneehaw Creek > Avery, County DNQ# 010556 > Greg, > I have a couple of questions regarding the subject project. > 1) What is the lrainage area of the reference reach? > 2) Can I get a :opy of the site plan w/the existing channel location, > the proposed channel (with structures), and cross section locations? > thanks, todd Greg Jennings, PhD, PE Associate Professor, Biological & Agricultural Engineering NC State Universi:y, Box 7625, Raleigh, NC 27695-7625 Office: 919-515-6771; Cell: 919-218-3389 http://www.bae.ncsu.edu/people/faculty/jennings/ Greg Jennings <Greg Jennings @ncsu.edu> Associate Professor NC State University Biological & Agricultural Engineering 1 of 1 4/25/019:29 AN S ? . , 1 s NN, 1 n N ?Op N r+ &A 0 o ?J cn °? bd FCD CD 1 v I ITI ?-• C14 ?-t CD N n CD 1 -`7 ::: of Shawncchaw Creek Subject: Shawneehaw Creek Date: Tue, 24 Apr 2001 14:52:29 -0400 From: "Todd St. John" <todd.st.john@ncmail.net> Organization: DWQ Wetlands Unit To: greg.jennings@ncmail.net CC: "mike.parker" <mike.parker@ncmail.net> Shawneehaw Creek Avery, County DWQ# 010556 Greg, I have a couple of questions regarding the subject project. 1) What is the drainage area of the reference reach? 2) Can I get a copy of the site plan w/the existing channel location, the proposed channel (with structures), and cross section locations? thanks, todd Todd St. John, P.E. Environmental Engineer II DWQ Wetlands Unit loft i Nuith Caralinn Slate University is a land- gmnt university and ? w[Mihient institution of 11o University of North Carolina 010550 April 12, 2001 Department of Biological and Agricultural Engineering Box 7625 Raleigh, NC 27695-7625 919.515.2675 919.515.6772 (fax) To: David Baker, US Army Corps of Engineers Todd St. John, NC Division of Water Quality Ron Linville, NC Wildlife Resources Commission APR' 6 Steve Bevington, NC Clean Water Management Trust Fund Linda Johnson, Town of Banner Elk Mike Pitman, NC Cooperative Extension Service - Avery County From: Greg Jennings, NC State University Re: Permit Application for Shawneehaw Creek Phase II Enhancement Project Please find enclosed a completed Pre-Construction Notification (PCN) Application Form and a stream enhancement design for Shawneehaw Creek in the Town of Banner Elk in Avery County. The purpose of the project is to improve water quality and aquatic habitat by reducing sedimentation; to improve stream stability; and to improve riparian and floodplain functionality of 800 feet of Shawneehaw Creek on Banner Elk Town property. The project meets the DWQ definition of stream restoration and therefore a permitting fee is not included with this package. The project is funded by the NC Clean Water Management Trust fund through a grant to North Carolina State University. This is not a stream mitigation project. If you have questions about this project, please contact Greg Jennings at 919-515-677 i. Enclosure Apr 09 01 11:33a ?? t? cx, ryo? N ,s o ? a \ 0 \S ? 911 ??/ Town of Banner Elk 1 Mayor Deka Tate, Council Members Brenda Lyerly, Joe B. Perry, Floyd Ramsey, Jack Masters, James Beasley t April 9, 2001 Mr. Greg Jennings NC State University Box 7625 Raleigh, NC 27695-7625 Dear Mr. Jennings: This lettcr servcs to authorizc you to act as the Town of Banner Elk's agent and complete the ACOE/DWQ Pre-construction forms for the Shawneehaw Phase II construction. If you should need anything further, please let me know. Sincerely, Linda Johnson Interim Manager p.2 PO Box 2049, 200 Park Avenue, Banner Elk, NC 28604 Phone: (828) 898-5398, FAX (828) 8984568, Website: townoibannerelk.org 1 ? ?0 W A T ?RQ > p ?C Pre-Construction Notification (PCN) Application Form For Section 404 and/or Section 10 Nationwide, Regional and General Permits, Section 401 General Water Quality Certifications, and Riparian Buffer and Watershed Buffer Rules This form is to be used for projects qualifying for any of the U.S. Army Corps of Engineers' (USACE) Nationwide, Regional or General Permits as required by Section 404 of the Clean Water Act and/or Section 10 of the Rivers and Harbors Act, and for the North Carolina Division of Water Quality's (DWQ) associated General 401 Water Quality Certifications. This form is also to be used for any project requiring approval under any Riparian Buffer Rules implemented by the N.C. Division of Water Quality. This form should not be used if you are requesting an Individual 404 Permit or Individual 401 Water Quality Certification. The USACE Individual Permit application form is available online at http://www.saw.tisace.army.nii]/wetlands/1'erni app.htm. The USACE is the lead regulatory agency. To review the requirements for the use of Nationwide, Regional or General permits, and to determine which permit applies to your project, please go to the USACE website at http://www.saw.usace.army.niil/wetlands/rcgtour.htni, or contact one of the field offices listed at the end of this application. The website also lists the responsible project manager for each county in North Carolina and provides additional information regarding the identification and regulation of wetlands and waters of the U.S. The DWQ issues a corresponding Certification (General or Individual), and cannot tell the applicant which 401 Certification will apply until the 404 Permit type has been determined by the USACE. Applicants are encouraged to visit DWQ's 401/Wetlands Unit website at http://h2o.enr.state.nc.us/ncwetlands to read about current requirements for the 401 Water Quality Certification Program and to determine whether or not Riparian Buffer Rules are applicable. The applicant is also advised to read the full text of the General Certification (GC) matching the specific 404 Permit requested. In some cases, written approval for some General Certifications is not required, provided that the applicant adheres to all conditions of the GC. Applicants lacking access to the internet should contact DWQ's Central Office in Raleigh at (919) 733-1786. Trout Waters Coordination - Special coordination with the North Carolina Wildlife Resources Commission (NCWRC) is also required for projects occurring in any of North Carolina's twenty-five counties that contain trout waters. In such cases, the applicant should contact the appropriate NCWRC regional coordinator (listed by county on the last page of this application). Page 1 of 12 CAMA Coordination - If the project occurs in any of North Carolina's twenty coastal counties (listed on the last page of this application) the applicant should also contact the North Carolina Division of Coastal Management (DCM) at (919) 733-2293. DCM will determine whether or not the project involves a designated Area of Environmental Concern, in which case DCM will act as the lead permitting agency. In such cases, DCM will require a Coastal Area Management Act (LAMA) Permit and will coordinate the 404/401 Permits. USACE Permits - Submit one copy of this form, along with supporting narratives, maps, data forms, photos, etc. to the applicable USACE Regulatory Field Office (addresses are listed at the end of this application). Upon receipt of an application, the USACE will determine if the application is complete as soon as possible, not to exceed 30 days. This PCN form is designed for the convenience of the applicant to address information needs for all USACE Nationwide, Regional or General permits, as well as information required for State authorizations, certifications, and coordination. Fully providing the information requested on this form will result in a complete application for any of the USACE Nationwide, Regional or General permits. To review the minimum amount of information that must be provided for a complete PCN for each USACE Nationwide permit, see Condition 13, 65 Fed.Reg. 12893 (March 9, 2000), available at littp://www.saw.Llsace.arniy.miI/wetlands/nwpfnalFedRe?;.pdf. Processing times vary by permit and begin once the application has been determined to be complete. Please contact the appropriate regulatory field office for specific answers to permit processing periods. 401 Water Quality Certification or Buffer Rules - All information is required unless otherwise stated as optional. Incomplete applications will be returned. Submit seven collated copies of all USACE Permit materials to the Division of Water Quality, 401/Wetlands Unit, 1650 Mail Service Center, Raleigh, NC, 27699-1650. If written approval is required or specifically requested for a 401 Certification, then a non-refundable application fee is required. In brief, if project impacts include less than one acre of cumulative wetland/water impacts and less than 150 feet cumulative impacts to streams, then a fee of $200 is required. If either of these thresholds is exceeded, then a fee of $475 is required. A check made out to the North Carolina Division of Water Quality, with the specific name of the project or applicant identified, should be stapled to the front of the application package. For more information, see the DWQ website at http://l12o.ehnr.state.nc.us/ncwetIands/fees.htni1. The fee must be attached with the application unless the applicant is a federal agency in which case the check may be issued from a separate office. In such cases, the project must be identifiable on the U.S. Treasury check so that it can be credited to the appropriate project. If written approval is sought solely for Buffer Rules, the application fee does not apply, and the applicant should clearly state (in a cover letter) that only Buffer Rule approval is sought in writing. Wetlands or waters of the U.S. may not be impacted prior to issuance or waiver of a Section 401 Water Quality Certification. Upon receipt of a complete application for a 401 Certification, the Division of Water Quality has 60 days to prepare a written response to the applicant. This may include a 401 Certification, an on-hold letter pending receipt of additional requested information, or denial. Page 2 of 12 Office Use Only: Form Version April 2001 USACE Action ID No. DWQ No. If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Section 10 Permit ® 401 Water Quality Certification ? Riparian or Watershed Buffer Rules 2. Nationwide, Regional or General Permit Number(s) Requested: NW 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ? 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII - Mitigation); check here: ? II. Applicant Information 1. Owner/Applicant Information Name: Town of Banner Elk Linda Johnson Interim Manager Mailing Address: PO Box 2049, 200 Park Avenue Banner Elk. NC 28604 Telephone Number: 828-898-5398 E-mail Address: Fax Number: 828-898-4568 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Greg Jennings Company Affiliation: North Carolina State University Mailing Address: Box 7625 NCSU Telephone Number: 919-515-6771 Fax Number: 919-515-6772 E-mail Address: greg_ienningsAncsu edu Page 3 of 12 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the frill-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: Shawneehaw Phase It Stream Enhancement 2. T.I.P. Project Number (NCDOT Only) N/A 3. Property Identification Number (Tax PIN): N/A 4. Location County: Avery Nearest Town: Banner Elk Subdivision name (include phase/lot number): N/A Directions to site (include road numbers, landmarks, etc.): Banner Elk Town Park located south of Highway 194 and east of Highway 184 in Banner Elk adjacent to the Banner Elk Town Hall. 5. Site coordinates, if available (UTM or Lat/Long): Lat/Long 36 09 30 / 81 52 20 (Note - If project is linear, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or condition of the site at the time of this application: Open field owned by the Town of Banner Elk intended for future recreational field. 7. Property size (acres): 10 acre 8. Nearest body of water (stream/river/sound/ocean/lake): Shawneehaw Creek 9. River Basin: Watauga River Basin (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at llttp://li2o.enr.state.nc.us/admin/maps/.) Page 4 of 12 10. Describe the purpose of the proposed work: To improve water quality and aquatic habitat by reducing sedimentation; improve stream stability; and improve riparian and floodplain functionality. This is not a mitigation project. 11. List the type of equipment to be used to construct the project: Trackhoe Excavator; Loader; Dump Truck; Hand Labor. 12. Describe the land use in the vicinity of this project: Town Park; Playground. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. N/A V. Future Project Plans Are any additional permit requests anticipated for this project in the future? anticipated work, and provide justification for the exclusion of this work application: N/A VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream If so, describe the from the current Page 5 of 12 mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Wetland Impacts Wetland Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Located within 100-year Floodplain** (es/no) Distance to Nearest Stream linear feet) Type of Wetland*** * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, riu, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both stricture and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at http://www.tema.gov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: N/A Total area of wetland impact proposed: N/A 2. Stream Impacts, including all intermittent and perennial streams Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? (please seci ) Phase II Stabilization 800 Shawneehaw 18 ft Perennial * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: culverts and associated rip-rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip-rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as U"r (unnamed tributary) to the nearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at www.umZs.aov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com, www.mapquest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 800 Page 6 of 12 3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Name of Waterbody (if applicable) Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) * List each impact separately and identify temporary impacts. Impacts include, but are not limited to: till, excavation, dredging, flooding, drainage, bulkheads, etc. 4. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ? uplands ? stream ? wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): Size of watershed draining to pond: Expected pond surface area: VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The project will enhance stream stability by protecting streambanks providing grade control improving bed features and reducing sediment concentrations in the stream. Stream impacts during construction will be minimized by working from the streambank and limiting ground disturbance to only those areas in the immediate vicinity of instream structures. Page 7 of 12 VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.ne.us/nc\vetIands/strmgide.htm1. 1. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. N/A Page 8 of 12 Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required- Mitigation 1 3 2 1.5 Total Zone t extends out 30 feet perpendicular trom near bank of channel; Gone z extenos an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 213 .0242 or .0260. XI. Stormwater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. No impervious acreage existing or proposed for this project XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. N/A XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules? Yes ? No g Is this an after-the-fact permit application? Yes ? No XNJ Page 10 of 12 XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). O Applicant/AgentCSig?ature / Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) US Army Corps Of Engineers Field Offices and County Coverage Asheville Regulatory Field Office Alexander Cherokee Iredell Mitchell US Army Corps of Engineers Avery Clay Jackson Polk 151 Patton Avenue Buncombe Cleveland Lincoln Rowan Room 208 Burke Gaston Macon Rutherford Asheville, NC 28801-5006 Cabarrus Graham Madison Stanley Telephone: (828) 271-4854 Caldwell Haywood McDowell Swain Fax: (828) 271-4858 Catawba Henderson Mecklenburg Transylvania Raleigh Regulatory Field Office Alamance Durham Johnston Rockingham US Army Corps Of Engineers Alleghany Edgecombe Lee Stokes 6508 Falls of the Neuse Road Ashe Franklin Nash Surry Suite 120 Caswell Forsyth Northampton Vance Raleigh, NC 27615 Chatham Granville Orange Wake Telephone: (919) 876-8441 Davidson Guilford Person Warren Fax: (919) 876-5283 Davie Halifax Randolph Wilkes Washington Regulatory Field Office Beaufort Currituck Jones US Army Corps Of Engineers Bertie Dare Lenoir Post Office Box 1000 Camden Gates Martin Washington, NC 27889-1000 Carteret* Green Pamlico Telephone: (252) 975-1616 Chowan Hertford Pasquotank Fax: (252) 975-1399 Craven Hyde Perquimans Wilmington Regulatory Field Office US Army Corps Of Engineers Post Office Box 1890 Wilmington, NC 28402-1890 Telephone: (910) 251-4511 Fax: (910) 251-4025 Anson Duplin Onslow Bladen Harnett Pender Brunswick Hoke Richmond Carteret Montgomery Robeson Columbus Moore Sampson Cumberland New Hanover Scotland P itt Tyrrell Washington Wayne Union Watauga Yancey Wilson Yadkin *Croatan National Forest Only Page 1 I of 12 US Fis US Fish and Wildlife Service Raleigh Field Office Post Office Box 33726 Raleigh, NC 27636-3726 Telephone: (919) 856-4520 h and Wildlife Service / National N US Fish and Wildlife Service Asheville Field Office 160 Zillicoa Street Asheville, NC 28801 Telephone: (828) 665-1 195 [arine Fisheries Service National Marine Fisheries Service Habitat Conservation Division Pivers Island Beaufort, NC 28516 Telephone: (252) 728-5090 North Carolina State Agencies Division of Water Quality 401 Wetlands Unit 1650 Mail Service Center Raleigh, NC 27699-1650 Telephone: (919) 733-1786 Fax: (919) 733-9959 Division of Water Quality Wetlands Restoration Program 1619 Mail Service Center Raleigh, NC 27699-1619 Telephone: (919) 733-5208 Fax: (919) 733-5321 CAMA and NC Coastal Counties State Historic Preservation Office Department Of Cultural Resources 4617 Mail Service Center Raleigh, NC 27699-4617 Telephone: (919) 733-4763 Fax: (919) 715-2671 Division of Coastal Management Beaufort Chowan Hertford - Pasquotank 1638 Mail Service Center Bertie Craven Hyde Pender Raleigh, NC 27699-1638 Brunswick Currituck New Hanover Perquimans Telephone: (919) 733-2293 Camden Dare Onslow Tyrrell Fax: (919) 733-1495 Carteret Gates Pamlico Washington NCWRC and NC Trout Counties Western Piedmont Region Coordinator Alleghany Caldwell Watauga 3855 Idlewild Road Ashe Mitchell Wilkes Kernersville, NC 27284-9180 Avery Stokes Telephone: (336) 769-9453 Burke Surry Mountain Region Coordinator Buncombe Henderson Polk 20830 Great Smoky Mtn. Expressway Cherokee Jackson Rutherford Waynesville, NC 28786 Clay Macon Swain Telephone: (828) 452-2546 Graham Madison Transylvania Fax: (828) 506-1754 Haywood McDowell Yancey Page 12 of 12 Shawneehaw Creek Stream Enhancement Plan Phase II Prepared For: Watauga River Basin Nonpoint Source Team NC Clean Water Management Trust Fund March 2001 Prepared By: r Gregor . Jenni gs, P .D., P.E. Associate Professor, North Carolina State University Dani Wise-Frederick, NCSU Karen Hall, NCSU Mike Pitman, NCSU INTRODUCTION The project site is an 800-ft reach of Shawneehaw Creek with a 3-square-mile watershed located in Banner Elk, NC (Figures 1 and 2). This project is a continuation of Phase I which enhanced 860 feet of Shawneehaw Creek immediately upstream from Phase 11 and was completed in 2000- 2001. Components of Phase I included installation of 6 boulder cross vanes and 20 root wads, streambank grading, and planting of the riparian corridor. Both projects are located in a Park owned by the Town of Banner Elk. Shawneehaw Creek is a tributary to the Elk River and the Watauga River. Water quality concerns in the Watauga River Basin include sedimentation from streambank erosion and loss of habitat resulting from poor riparian vegetation and channel alterations. Project goals are to: (1) improve water quality and aquatic habitat by reducing sedimentation; (2) improve stream stability; and (3) improve riparian and floodplain functionality. These goals will be met by implementing a natural channel design that enhances the channel's dimension, pattern and profile to a natural, stable form. EXISTING CONDITION The project reach is 800 feet long and includes both sides of the stream. The stream is located in a wide alluvial valley in the Mountain physiographic region. The stream channel has been straightened and moved to the edge of the valley. There is a steep vegetated hillslope beyond the right streambank of most of the reach. Just beyond the left streambank is a sewer line following the entire length of the project reach. The alluvial valley and floodprone area is located beyond the left streambank and extends approximately 300 feet to the next hillslope. The project reach is classified as a C4 Rosgen Stream Type with bank height ratios near 1.0. Previous channelization and buffer removal has caused moderate channel widening and some bank instabilities. Streambank erosion is moderate along the project reach. Channelization has also caused a significant loss of pools. The bedforms are mostly riffles and runs. The riparian area is predominantly grass with few trees and little shade over the stream. BANKFULL VERIFICATION Bankfull stage is the top of the streambank for this reach. The reach is located on a flat alluvial floodplain and contains bedrock which maintains the grade and prevents downcutting. The cross sectional areas measured in the field are shown in Figure 3 in relation to the NC Mountain Regional Curve. The measured bankfull cross section areas are lower than would be expected on the regional curve because of the extensive forested areas in the watershed and the lack of channel incision observed in this reach. 4 66 i? y \ IL U • ?W U ? 3 ? Ct .-.r ? •o ? a ct w U- o 1r c? a • * ct U r S 00 r M r NC Rural Mountain Regional Curve 1000 E N d Q W 100 N X Y c m GO 10 0000 _- - ? ---- -__-- ? Regional Curve Data -- - - -- - - ¦ XSEC 0+97 ? XSEC 5+08 ''K XSEC 6+33 1 10 100 1000 y = 21.61 x"' Drainage Area (sq mi) R2 = 0.89 Figure 3. Shawneehaw Creek Phase II Bankfull Cross-Section Areas in Relation to the NC Mountain Regional Curve. REFERENCE REACH ANALYSES Basin Creek was selected as the reference reach for this project because of its close proximity and similar stream type. Basin Creek is located along the Blue Ridge escarpment and is the headwaters of the Yadkin River. The USDA Natural Resources Conservation Service, the NC Stream Restoration Institute and graduate students in the Department of Biological and Agricultural Engineering conducted three separate reference reach surveys. The reference reach values and ratios are shown on the design table in the Appendix. NATURAL CHANNEL DESIGN The plan view of the natural channel design is shown in Figure 4 with design parameters listed in Appendix 2. Overall, the dimension, pattern, and profile of the project reach are moderately stable with a vegetated riparian buffer on the right side and some diversity of riffle and pools. However, the lack of riparian buffer on the left side and the close proximity of the hillslope in the middle of the reach have caused localized instabilities. The design approach includes installing cross vanes, stabilizing the eroding streambanks, and installing a bankfull bench near station 5+00 to reduce streambank erosion. The bankfull bench along the right streambank will be approximately 10 feet wide with the toe of the bank stabilized with root wads and two rock vanes. The top of the bankfull bench will be planted with a variety of native species. Seven cross vanes will be constructed to protect streambanks, narrow the channel width, enhance pool habitat, and provide grade control. Root wads will be installed along the outside of meander bends to improve streambank stability and fish habitat. 2 m 4. r ' Al .r \ yt f " r t` r r ?+ a aryl ?q{y ? i- W 'T? fly ? a .9 n ?` ", CJ? ?? ? +? • 3-r ? I ?+a/ ? .i ? ? ? + ,a ,, Ali`' ¦ ?? ' S 1, r ? ? ? A 25-ft riparian buffer will be established from the top of the streambank. Live cuttings of black willow and silky dogwood will be staked along each meander bend. A combination of native herbaceous and woody vegetation will be established in the riparian buffer. Permanent seeding will include native grasses and woody vegetation. Temporary vegetation for erosion control will include annual rye (cool season) or millet (warm season) depending on the construction schedule. The existing tree buffer along the right bank will be maintained in its current condition. SEDIMENT TRANSPORT A stable stream has the capacity to move its sediment load without aggrading or degrading over time. The total load of sediment can be divided into bedload and suspended load. Suspended load is normally composed of fine sand, silt and clay particles transported in the water column. Bedload is transported by rolling, sliding, or hopping (saltating) along the bed. The movement of sediment particles depends on the energy of the stream and their physical properties. Grain size has a direct influence on the mobility of a given particle. Critical dimensionless shear stress ('c*,;) is a measure of the force required to move a given size particle resting on the channel bed. It can be calculated for a gravel-bed stream using a surface and subsurface particle sample from a representative riffle in the reach. -0.872 d. T *r; = 0.083 [Equation 1] d5o Where, i*ci = critical dimensionless shear stress d; = median particle size of riffle bed surface (mm) d5o = median particle size of subsurface sample (mm) Critical dimensionless shear stress can then be used in the following equation to predict the minimum water depth required to move the d84 of the pavement sample. The water depth is calculated by: Dcr = 1.65T *,.; d 84 ,,b [Equation 2] S Where, Dcr = water depth (ft) T*Ci = critical dimensionless shear stress d84sub = d84 of subpavement sample (ft) s = average channel slope (ft/ft) Critical dimensionless shear stress was calculated for Shawneehaw Creek on a pavement/subpavement analysis conducted near station 4+00. The d50 of the pavement sample was 6.5 mm, and d50 for the subpavement was 15 mm. Using Equation 1, the critical dimensionless shear stress = 0.04. To find the depth of water necessary to move the d84 of the pavement sample (=90 mm), Equation 2 was used. A critical depth of 1.1 ft was calculated. This means that at a water depth of 1.1 ft in the design channel, particles up to 90 mm in size would be mobile. The mean bankfull depth for the proposed restoration design is 1.5 ft. Therefore, the design channel would be able to transport the materials without aggrading. As a check, boundary shear stress was calculated for the design dimension and compared with Shields Curve. The shear stress placed on the sediment particles is the force that entrains and moves the particles, given by: z = yRs [Equation 3] Where, r = shear stress (lb/fta) y = specific gravity of water (62.4 lb/ft) R = hydraulic radius (ft) s = average channel slope (ft/ft) If the shear stress is determined from the Shield's diagram to move a particle size that is significantly larger or smaller than the d84 of the pavement sample, then the sinuosity may need to be increased or decreased respectively, in order to adjust the average channel slope, thus adjusting the shear stress. Boundary shear stress was calculated for the design using Equation 3, and equaled 0.82 Ibs/ftz. From Shields diagram (Figure 5), this shear stress value would be able to move a particle size of approximately 60 mm. 1000 100 E v d E 10 0 a 0.1 1 0.001 0.01 0.1 Critical Shear Stress (Ibs/sqft) Figure 5. Shield's Curve 1 10 4 CONSTRUCTION Construction Materials Estimate Item Quantity Units Description Boulders 500 TONS 6ft X 4ft X 3ft Root Wads 30 See Appendix Erosion Mat 2000 SQ FT C 125BN Rye rain 400 LBS Apply at 130 lbs/ac Fertilizer 1200 LBS Apply at 435 Ibs/ac Mulch 50 BALES Apply at 130 bales/ac The following equipment is mandatory for the project: • Track hoe with a hydraulic thumb. • Track loader • Chain saws • All other equipment and materials necessary to complete the job as described 5 v ea A., v v a 3 c? C O a u A c 0 w u v 0 U C X10 a 0 ? ? o 0 0 0 0 0 0 sx ? oo .o o v, ?i -? mot; W ? N ? v'i d' ? vl ?D cs pp O 0 O N N 0 k A M N N M -? N ?' V'? N ?O N v'1 G1 C v? a r1 kf, o ?o ry V-) o C -? ri m V1 G\ 3 N M N -? N hl cal --+ O O [? k r) O N l- G1 O M V) N M N M N M a E - ; V 0 0 0 U U U 1. N ? c c r- a a ao o,o •.on W Q W Q W Q CIO V V c ? b ? ? i O O M x x o ? w w X C'l Q??e a o E a¢i 3 Q o E C 0 z; E ? ? C C cli 3 II II W II o.. II a; Q 3 w ? ^_ w o c3 ? u n Q ? ? Q o U 3 3 x c W II w II II e 3 Q 3 Design Parameters * Indicates No Data Available Shawneehaw Phase II Parameter Design Existing Reference Reach Name Shawneehaw Shawneehaw Basin Cr Bankfull XSEC Area, Abkf (ft) 30.0 26.0 57.4 Bankfull Width, Wbkf (ft) 20.0 22.0 30.7 Bankfull Mean Depth, Dbkf (ft) 1.5 1.2 1.9 Width to Depth Ratio, W/D (ft/ft) 13.3 18.6 16.4 Entrenchment Ratio, Wf a/Wbkf (ft/ft) 4.5 4.5 2.8 Bank Height Ratio, Dtob/Dmax (ft/ft) 1.0 1.0 1.0 Min Bkf Max Depth, Dmax (ft) 2.1 1.3 --- Min Bkf Max Depth, Dmax (ft) 3.3 2.6 --- Min Bkf Max Depth Ratio, Dmax/Dbkf 1.4 1.1 1.2 Max Bkf Max Depth Ratio, Dmax/Dbkf 2.2 2.2 2.2 Min Meander Length, Lm (ft) 100 80 --- Max Meander Length, Lm (ft) 200 230 --- Min Meander Len Ratio, Lm/Wbkf 5.0 3.6 8.0 Max Meander Len Ratio, Lm/Wbkf 10.0 10.5 11.0 Min Radius of Curvature, Re (ft) 50 32 --- Max Radius of Curvature, Re (ft) 100 125 --- Min Rc Ratio, Re/Wbkf 2.5 1.5 2.4 Max Re Ratio, Rc/Wbkf 5.0 5.7 4.2 Min Belt Width, Wblt (ft) 60 55 --- Max Belt Width, Whit (ft) 100 90 --- Min MW Ratio, Wblt/Wbkf (ft) 3.0 2.5 3.5 Max MW Ratio, Wblt/Wbkf (ft) 5.0 4.1 4.0 Sinuosity, K 1.3 1.20 1.02 Valley Slope, Sval (ft/ft) 0.0132 0.0132 --- Channel Slope, Schan=Sval/K (ft/ft) 0.0101 0.0109 --- Pool Slope, Spool (ft/ft) 0.0003 0 --- Pool Slope Ratio, Spool/Schan 0.03 0.00 0.05 Min Pool Depth, Dpool (ft) 3.0 2.3 --- Max Pool Depth, Dpool (ft) 4.2 3.7 --- Min Pool Depth Ratio, Dpool/Dbkf 2.0 1.9 1.6 Max Pool Depth Ratio, D ool/Dbkf 2.8 3.1 2.6 Min Pool Width, Wpool (ft) 22.0 21 --- Max Pool Width, Wpool (ft) 28.0 25 --- Min Pool Wid Ratio, W ool/Wbkf 1.1 1.0 1.3 Max Pool Wid Ratio, WpooVWbkf 1.4 1.1 1.5 Min Length Pool Spacing, L s (ft) 80 82 --- Max Length Pool Spacing, L s (ft) 140 165 --- Min Pool Spacing Ratio, L s/Wbkf 4.0 3.7 5.0 Max Pool Spacing Ratio, L s/Wbkf 7.0 7.5 8.0 G ?r T ?' lct T ? l? T lH T O 0 00 0 0 t-- 0 0 a? a 3 a? C (D L?i 0 a r~ z7 Q O 0 0 If) O v Q O O M O O N O O r--, 00 O M 00 M 00 O c G1 00 (1j) uotILInajg O oA • -" bA a? W Q i B cd a 3 a? 3 U E. F?1 0 a G1 O U N I V t 4 4 7 t E 1 e s N '-- O C? 00 l-- ?10 O O O CIN CN C? (13) U011PAa[g O C? O 00 a? O U Q O O •? bA W Q 0 M O N ? O .? o a a 00 O O O/?IV S O? 0/?0 r- ?/? to It M? N? /+? O? V\ CN V CN ? C\ C? V% (1j) UOIIUAatg a s a a s 6 a ? • s • • m • r • E • s d d cn A ? •? bA a? W Q 6 6 A O 00 O u cn 03 lf? a 3 03 a? U A c:, ,C CJ7 Q? O a M M U N Cn x e 9 t i O 1-11 ct? a? U A CC Q O O O M (-- 11.0 V) d m N r-+ O (1j) UoIjPnalg 0.4 GJ y a 3 c? ad ad a? c 3 c? G Q w+ L" O U v v N u 0. ?o 0 kn M 0 c kf) 0 't 00 Q In C*, Q C •? y O M O N 'r? .-r ? N r? ? --+ ? p of ? p G1 ? --+ 'n ?O N ? O p 'n `? 0 ^" --? A O O C ::? ?o N c l d CN O v) 'n N p O W O O Q N ^ ^ ^ ' 3 A 3 x ? ? b b W ) ? b b A C O V U Rte. c C C b CT O N ' ' ? 't ? •--? 110 ^+ N M M It O O F a --? M M M ct d v1 v 1 ?o ?o [ I 00 00 G1 G1 G1 G1 G1 .-. U kn N in kn N vl O kn It -}' N M [-- In kn - O -• \o O i. kn ? ~ N u 1 N N kn O kn It It to M l- to kn -? p - O O z v ?ti C 'O E N N O0 O O O r- O m p '-c N ?n O N 0 N di C.? B O O O -+ N 00 N M cf CT N M v 1 N O O O 0 0 0 0 0 O O a o ? U ? N 3 a 0 0 a? N o a? U a r4 0 I_I I I I I I t o 0 0 0 0 0 0 0 0 0 0 0 0 O G1 00 t? ?o V-) "t M N --+ O/0 QATILInwnD a? a a a a 3 U b C CC L v 0 c o ? F? '3 c o 0 0 0 0 o a F ?? 0 0 000 N N Fr C. $. 2 Ed ?-O O O 0 CO u kn k n kn In o, 0 0 0 0 0 v? - o o O O 0 u LW v? u 0 M 0 M 0 M 0 M 0 M [ 0 0 0 0 0 v d A o 0 0 0 0 ? '?"? M O O M M x o v k O O [? N M L z '? ? N > GJ a c J > -? o G j > Ln cq 3 .? F x C) 0 .? U W H b w a U 0 4 U o o O b D 00 N a U b u C'I r- U 0 a 0 ? > Q ro h I I ` I ?I co l I °= DI I E I I ? I of N I °I A 16 Q r U) ca 0 I ml c EC I m .0 :a >>? I conE I I I I / U / O O r? ` co O l1? C r N d m O. O U) uoi as ssoa ? oo a?id?C ? S ? p M? ? I 1 co ? co . cm _ ? G) L N co o Cl) U) pnymueg O W rL a? Co i- Y ? O •- ? U " v .x O .0 , L C ?) u cam, N it O 0 CU n a LL ' ? k`7 I ?Illilll € IIIIjIII !111!1 unjMUee II z III ` ? ?"- °I?I?III ,, y . ICI w j Jl III I . ? I U.) ?" I%III I% w U) 4 `'' ,II JI ? `' ? I I I p ° C) Iliupl = c ?I? II -OV co m 1 IIEII 111 ;?II?L? III m III m W ? '?? N ?' ? ?I\111\1 III X866 ? 'ua6so? wo?? pa?depy) ? w E ° ? co c .? = c ? 3 a 0) N saa au?n ssoa? ???id?Cl u? o? ?? ° i M ? m ? °o C ? c_ rn Ii? VIII CIO I?I?III C %III? I I%I I C I ?' ?%I ICI ?I x Illi m?ill??l% s III I 1 mI? Ili c II illl Z ??' , ?m N5 I III?J o I?t:ll o I? I I ? , J?III a I?IhI j U) III III jl ,??,II o `? ?IIIIII%t a? J' II c l l l i ? II E ' \?I?\IIL jil Y m co , ICI LL y m p g m W illl E .tm N 0 a Q N C J N 2, ,. °' m d O co o o C a `L N - ?J C H ?? N N :3 L lb > r1 ct1 ` , Z Z N 866 ? 'ua6sob woad pa}dept') ro ? u?isaa au?n ???id?Cl o ? ? L) co ( C: cn co [2 CD m 0 cu € ?=111 ?/I co II i \ II ?? it/I il\ I o ? i i IA III?% % m :11MIl l ? g ? ml?? III?III ? ??? pl?ll III?,,\, ,`' Jul I I I \??I> I? I I pl??l Diu 3 ? mm `'Ij1 I I ? g I QI•mw CO Y' 0 N ? v .- N %i r w CL -N C C 'O N / ?Z 2 Z fC U Y C N C U ^?•1 td -? N - : c N Y ? Y U O M r O cc O m 0 CL CL V) C) ` 1 r Z h (866 'ua6soU wad paldepy) E ? co m _ o 3 ? N u?isaQ au?n ?ooH f ? I??id?C1 0? „ ? 0?0?,5-co r APR g 2U f`1- North Carohna Wildlife Resources Coinmissi011 Charles R. FtIllwoocl, f.XCCUUVCt Director MEMORANDUM TO: David Baker, Pennit Coordinator Asheville Office, U.S. Army Cotes of Engineers FROM: Ron Linville, Regional Coordinatoir, ,/C/ Habitat Conservation Program DATE: April 17, 2001 SUBJECT: Review of Application by Greg Jennings, Shawneehaw Creek Phase iI Enhancement, Shawneehaw Creek, Town of Banner Elk, Avery County The applicant is requesting a letter of concurrence from the North Carolina Wildlife Resources Commission (NCWRC) to obtain a 404 pennit from the U.S. Army Corps of Engineers for the referenced stream enhancement project. The project will include 800 linear feet of riparian and floodplain function enhancement, including instream structure placement. The NCWRC has reviewed information provided by the applicant, and field biologists on our staff are familiar with habitat values of the project area. These comments are provided in accordance with provisions of the Clean Water Act of 1977 (33 U.S.C. 466 et. seq.) and the Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667d). The Elk River is Designated Public Mountain Trout Water that supports brown and rainbow trout. Wild brown trout are found in the area. Based on the information provided by the applicant and our information on the range of trout in the project area, we do not believe this project will cause significant effects to waters supporting trout provided the following conditions are implemented: 1. Insh•eam work and land disturbance within the 25-foot wide buffer zone should be prohibited during the trout spawning seasons of October 15 through April 15 to protect the egg and fry stages of trout. 2 Native materials and vegetation should he utilized to the extent practicable for the project. 3. New equipment or equipment in very good condition should be used for all instream work. Spill containment equipment should be readily available (on site). 4. Sediment and erosion control measures shall adhere to the design standards for sensitive watersheds (15A NCAC 4B.0024). 5. Temporary or permanent herbaceous vegetation should be planted on all bare soil within 5 days of ground disturbing activities to provide long-term erosion control. In addition to the above conditions, the applicant should consider increasing the use of' native trees and shrubs to improve shading of the stream. This should provide additional aesthetics as well as provide for cooler stream water. Thank you for the opportunity to review and comment on this project. if you have any questions regarding these comments, please contact me at 336/769-9453. Cc: John Dorney, DWQ Greg Jennings, NCSU Madill,, Address: Division of lul<<ncl I'ishcru.s • 1721 Mail 5cr?ice Cvmer • R,delgh,NC 2 7699-1 72 1 Telephone: (919) 733-3633 ext. 281 1 Fax: (919) 715-7643