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HomeMy WebLinkAbout20051567 Ver 1_Complete File_20050815OW A T ?R > Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources August 22, 2005 Robert Wiseman, County Manager Avery County Post Office Box 640 Newland, NC 28657 Subject Property: North Toe EWP (DSR - NT-19) Alan W. Klimek, P.E. Director Division of Water Quality DWQ Project # 05-1567 Avery County D AUG 3 1 2005 DENR - WATER QUALITY V,_r_TLWS A14D STOR6IWATER BRANCH Approval of 401 Water Quality Certification with Additional Conditions Dear Mr. Wiseman: You have our approval, in accordance with the attached conditions and those listed below, to place fill within or otherwise impact 1,300 feet of streams for the purpose of streambank stabilization and woody debris removal / trash removal at the subject properties, as described within your application received by the N.C. Division of Water Quality (DWQ) on July 27, 2005. After reviewing your application, we have decided that the impacts are covered by General Water Quality Certification Number(s) 3367 (3367). The Certification(s) allows you to use Nationwide Permit(s) 37 when issued by the US Army Corps of Engineers (USACE). In addition, you should obtain or otherwise comply with any other required federal, state or local permits before you go ahead with your project including (but not limited to) Erosion and Sediment Control, Non-discharge, and stormwater regulations. Also, this approval to proceed with your proposed impacts or to conduct impacts to waters as depicted in your application shall expire upon expiration of the 404 or CAMA Permit. This approval is for the purpose that you described in your application. (Nothing in this approval should be interpreted as giving permission to remove bedload material from the existing channel, nor allowing for the construction of berms which would not allow the stream access to it's floodplain.) As "stable" and "pre-storm" are not interchangeable terms, all work must be to ensure stability, regardless of channel location. Additionally, channels cannot be returned to it's pre-storm location unless there is documented instability is submitted and approved as part of the application package. If you change your project beyond the approval here, you must notify us and you may be required to send us a new application. If the property is sold, the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions. If total fills for this project (now or in the future) exceed one acre of wetland or 150 linear feet of stream, compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h). This approval requires you to follow the conditions listed in the attached certification and any additional conditions listed below. 401 Wetlands Certification Unit 1650 Mail Service Center, Raleigh, North Carolina 27699-1650 2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604 Phone: 919-733-1786 /FAX 919-733-6893 / Internet: http://h2o.enr.state.nc.us/nmvetlands 4C"DEi` . An Equal Cpportuniy/Affirmatiie Action Employer- 50% Recycled/10% Post Consumer Paper Avery County: Page 2 of 6 August 22, 2005 The Additional Conditions of the Certification are: 1. Impacts Approved The following impacts are hereby approved as long as all of the other specific and general conditions of this Certification (or Isolated Wetland Permit) are met. No other impacts are approved including incidental impacts: Amount Approved (Units) Plan Location or Reference Stream 1,300 feet North Toe River 2. Erosion & Sediment Control Practices Erosion and sediment control practices must be in full compliance with all specifications governing the proper design, installation and operation and maintenance of such Best Management Practices in order to protect surface waters standards: a. The erosion and sediment control measures for the project must be designed, installed, operated, and maintained in accordance with the most recent version of the North Carolina Sediment and Erosion Control Planning and Design Manual b. The design, installation, operation, and maintenance of the sediment and erosion control measures must be such that they equal, or exceed, the requirements specified in the most recent version of the North Carolina Sediment and Erosion Control Manual. The devices shall be maintained on all construction sites, borrow sites, and waste pile (spoil) projects, including contractor-owned or leased borrow pits associated with the project. c. For borrow pit sites, the erosion and sediment control measures must be designed, installed, operated, and maintained in accordance with the most recent version of the North Carolina Surface Mining Manual. d. The reclamation measures and implementation must comply with the reclamation in accordance with the requirements of the Sedimentation Pollution Control Act. 3. No Waste, Spoil, Solids, or Fill of Any Kind No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond the footprint of the impacts depicted in the Pre-Construction Notification. All construction activities, including the design, installation, operation, and maintenance of sediment and erosion control Best Management Practices, shall be performed so that no violations of state water quality standards, statutes, or rules occur. Avery County: Page 3 of 6 August 22, 2005 4. No Sediment & Erosion Control Measures w/n Wetlands or Waters Sediment and erosion control measures shall not be placed in wetlands or waters to the maximum extent practicable. If placement of sediment and erosion control devices in wetlands and waters is unavoidable, they shall be removed and the natural grade restored within six months of the date that the Division of Land Resources has released the project. 5. Certificate of Completion Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer Rules, and any subsequent modifications, the applicant is required to return the attached certificate of completion to the 401/Wetlands Unit, North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650. 6. Construction in this creek and disturbance within a 25-foot trout buffer, where applicable, should be avoided during the October 15 to April 15 trout spawning period to avoid adverse effects of sediment on eggs and larvae, where applicable. However, Wildlife Resources Commission will not object to construction of Natural Resources Conservation Service "urgent and compelling" sites during the spawning period provided these projects are, to the extent appropriate and practical, constructed by: (1) using flow diversion structures such as sand bags, (2) placing large-sized rock toes and filter cloth backing for stabilization sites before backfilling, and (3) excavating new channel alignments in dry areas. Construction at the other non-"urgent and compelling" sites should not occur during the spawning period to minimize the potential adverse effects of multiple construction activities on trout resources in this creek. 7. Sediment and erosion control measures must be implemented prior to construction and maintained on the sites to minimize sediment in downstream areas. Seeding for a temporary cover of wheat, millet, or similar annual grain or permanent herbaceous cover should occur on all bare soil within five (5) days of ground disturbing activities to provide long-term erosion control. The projects should be accomplished in stages instead of leaving large tracts exposed to further storm events. Erosion control matting should be used in conjunction with appropriate seeding on disturbed soils in steep slope and riparian areas. Matting should be secured in place with staples, stakes, or, wherever possible, live stakes of native trees. Straw mulch and tall fescue should not be used in riparian areas. In addition, because of an anticipated difficulty in establishing ground cover during the winter, reseeding should be conducted, as necessary, in the spring-time with a native annual and perennial seed mix with a temporary nursery crop of wheat, millet or other grain. Avery County: Page 4 of 6 August 22, 2005 8. Only clean, large, angular rock, large woody material, or other natural stream design materials and techniques should be used for bank stabilization. Rock should not be placed in the stream channel in a manner that constricts stream flow or that will impede aquatic life movements during low flow conditions. Filter cloth should be placed behind large rock that is used for bank stabilization. Properly designed rock vanes should be constructed wherever appropriate on bank stabilization and channel realignment stream reaches to improve channel stability and to improve aquatic habitat. Root wads should be installed low enough in the bank so that a significant portion (at least one-third) the root wad is inundated during normal flows. 9. The channel should be restored to a more stable condition. However, under no circumstances should river rock, sand or other materials be dredged from the stream channel under authorization of this permit except, if necessary, in the immediate vicinity of the eroding banks for the explicit purpose of anchoring stabilizing or flow/grade control structures or for reestablishing the natural and more stable stream channel dimensions. Stream bed materials are unstable in flowing-water situations and are unsuitable for bank stabilization. In stream dredging has catastrophic effects on aquatic life and disturbance of the natural form of the stream channel can cause downstream erosion problems. The natural dimension, pattern, and profile of the stream upstream and downstream of the permitted area should not be modified by widening the stream channel or changing its depth. 10. Stabilization measures should only be applied on or near existing erosion sites, leaving other stable stream bank areas in a natural condition. Grading and backfilling should be minimized and tree and shrub growth should be retained where possible to ensure long term availability of stream bank cover for aquatic life and wildlife. Backfill materials should be obtained from upland sites except in cases where excess stream bed materials are available. Berms should not be permitted because they block the floodplain, constrict and accelerate flood flows, and often fail and sometimes impede drainage during large flood events. 11. Repairs to eroded banks should be conducted in a dry work area where possible. Sandbags or other clean diversion structures should be used where possible to minimize excavation in flowing water. Channel realignments should be constructed by excavating the new channel from downstream to upstream before connecting it to the old channel. 12. Heavy equipment should be operated from the bank whenever possible. All mechanized equipment operated near surface waters should be inspected and maintained regularly to prevent contamination of stream waters from fuels, lubricants, hydraulic fluids or other toxic materials. Equipment used in stream channel must be clean, new or low hour equipment. 13. Disturbed stream banks and a 25-foot vegetated zone, or the widest width that is practical under the site conditions, should be restored along the construction sites to natural riparian conditions with native trees and shrubs (e.g., silky dogwood, rhododendron, dog hobble, red maple, silky willow, tag alder, black willow, sycamore) to provide long-term bank stability and stream shading. Note, silky dogwood, silky willow and black willow can be planted as live stakes collected during the dormant growing season. Cuttings should be randomly planted on four (4) foot centers from the waters edge to the top of the bank. Trees should be planted on ten (10) to twelve (12) foot centers. Stream banks in these areas should also be Avery County: Page 5 of 6 August 22, 2005 seeded with a native annual and perennial seed mix with a temporary nursery crop of wheat, millet or other grain. 14.If pasture along the stream is to be used for grazing, a fence must be constructed outside of the riparian zone and the stream to prevent livestock from entering these areas. 15. Diffuse Flow All constructed stormwater conveyance outlets shall be directed and maintained as diffuse flow at non-erosive velocities through the protected riparian zones such that it will not re-concentrate before discharging into a stream. If this is not possible, it may be necessary to provide stormwater facilities that are considered to remove nitrogen. This may require additional approval from this Office. 16. Riparian Zone Replanting Replanting of vegetation within disturbed areas located within 30 feet of the streambank associated with any land disturbing activity, repair, replacement and/or maintenance must be done in a manner consistent with the Guidelines for Riparian Buffer Restoration immediately following construction. (Please see attached.) 17. Deed Notifications Deed notifications or similar mechanisms shall be placed on all retained jurisdictional wetlands, waters and protective woody riparian zones in order to assure compliance for future wetland, water and buffer impact. These mechanisms shall be put in place prior to impacting any wetlands, waters and/or buffers approved for impact under this Certification Approval and Authorization Certificate. A sample deed notification can be downloaded from the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetiands. The text of the sample deed notification may be modified as appropriate to suit to this project. 18. Turbidity Standard The turbidity standard of 10 NTUs (Nephelometric Turbidity Units) shall not be exceeded as described in 15 A NCAC 2B. .0200. Appropriate sediment and erosion control practices must be used to meet this standard. 19. No Sediment and Erosion Control Measures in Wetlands Sediment and erosion control measures shall not be placed in wetlands or waters to the maximum extent practicable. If placement of sediment and erosion control devices in wetlands and waters is unavoidable, they shall be removed and the natural grade restored within six months of the date that the Division of Land Resources or locally delegated program has released the project. Avery County: Page 6 of 6 August 22, 2005 Violations of any condition herein set forth may result in revocation of this Certification and may result in criminal and/or civil penalties. The authorization to proceed with your proposed impacts or to conduct impacts to waters as depicted in your application and as authorized by this Certification, shall expire upon expiration of the 404 or CAMA Permit. If you do not accept any of the conditions of this Certification (associated with the approved wetland or stream impacts), you may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written petition, which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This certification and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Cyndi Karoly in the Central Office in Raleigh at 919-733-9721 or Mr. Kevin Barnett in the DWQ Asheville Regional Office at 828-296-4657. Sincerely, Alan W. Klimek, P.E., Director Division of Water Quality AW K/khb Enclosures: GC 3367 Certificate of Completion Guidelines for Riparian Buffer Restoration cc: Doug Smith, Buck Engineering, PC 8000 Regency Parkway Suite 200 Cary, NC 27511 USACE Asheville Regulatory Field Office DWQ 401 Central Office DLR Asheville Regional Office File Copy Central Files Filename: 05-1567. EWP. NorthToe.Approval Triage Check List Date: 08/18/05 Project Name: Avery County EWP DSR NT19 DWQ #:05-1567 County: Avery Kevin Barnett, Asheville Regional Office To: 60-day Processing Time: 8/15/05 to 10/13/05 From: Cyndi Karoly Telephone: (919) 733-9721 The file attached is being forwarded to you for your evaluation. Please call if you need assistance. ? Stream length impacted ? Stream determination Wetland determination and distance to blue-line surface waters on USFW topo maps ? Minimization/avoidance issues ? Buffer Rules (Neuse, Tar-Pamlico, Catawba, Randleman) ? Pond fill Mitigation Ratios ? Ditching ? Are the stream and or wetland mitigation sites available and viable? ? Check drawings for accuracy Is the application consistent with pre-application meetings? ? Cumulative impact concern Comments: As per our discussion regarding revision of the triage and delegation processes, please review the attached file. Note that you are the first reviewer, so this file will need to be reviewed for administrative as well as technical details. If you elect to place this project on hold, please ask the applicant to provide your requested information to both the Central Office in Raleigh as well as the Asheville Regional Office. As we discussed, this is an experimental, interim procedure as we slowly transition to electronic applications. Please apprise me of any complications you encounter, whether related to workload, processing times, or lack of a "second reviewer" as the triage process in Central had previously provided. Also, if you think of ways to improve this process, especially so that we can plan for the electronic applications, let me know. Thanks! EWP-Avery County, North Carolina DSR No. NT19 - North Toe River French Broad River Basin Scope of Work This site is on North Toe River along Wes Brewer Road. Site specific plans, which are attached, show site location, existing conditions and planned repairs. All repair work is being proposed under the Emergency Watershed Protection Program that Avery County is administering. Questions relative to this package should be directed to Buck Engineering's Greg Price at 919.459.9009. Contents • Preconstruction Notification (Permit Application). • Plan Review Checklist of NRCS's review. • Agent Authorization Letter for Avery County. • Vicinity Map • Repair Plan • Table 1. Property owners of sites proposed for repair. • Cultural Resources Review. • Threatened and Endangered Species Review. • Erosion and Sediment Control Plan • Details and Specifications od?D PSG 1 5 ?pp5 NO NI ?P e Sao Office Use Only: Form Version May 2002 USACE Action ID No. DWQ No. (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) 1. Processing 1. Check all of the approval(s) requested for this project: ® Section 404 Permit ? Riparian or Watershed Buffer Rules ? Section 10 Permit ? Isolated Wetland Permit from DWQ ® 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 37 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 (verify availability with NCWRP prior to submittal of PCN), complete section VIII and check here: ? 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details) U l1'6e? R.. II. Applicant Information ?5 D AUG 1 5 2005 1. Owner/Applicant Information Name: Robert Wiseman (County Manager) DENR-WATER QUALITY " EP6Y 3vr'cf3-"si GRh fii';4; ER 641f61 I Mailing Address: County Administrative Offices P.O. Box 640 Newland, NC 28657 Telephone Number: 828-733-8201 Fax Number: E-mail Address: 2. Agent/Consultant 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: Doub Smith Company Affiliation: Buck Enpineerin2 PC Mailing Address: 8000 Recency Parkway, Suite 200 Cary, NC 27511 Telephone Number: 919-463-5488 Fax Number: 919-463-5490 E-mail Address: dsmithnbuckengineering.com III. Project Information Pagel of 9 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: Avery County EWP, DSR NTA- North Toe River. 2. T.I.P. Project Number or State Project Number (NCDOT Only): N/A 3. Property Identification Number (Tax PIN): See attached Table 1. 4. Location County: Avery Nearest Town: Newland Subdivision name (include phase/lot number): N/A Directions to site (include road numbers, landmarks, etc.): The location of each site is attached on the EWP Index Map and provided in each individual site repair plan. 5. Site coordinates, if available (UTM or Lat/Long): Attached in site repair plan. (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. Property size (acres): N/A 7. Nearest body of water (stream/river/sound/ocean/lake): North Toe River 8. River Basin: French Broad River (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.ne.us/admin/maps/.) 9. Describe the existing conditions on the site and general land use in the vicinity of the project at the time of this application: A site specific description is in each site plan. The site is approximately 1300 feet long with residential homes and agricultural farmland. Residential homes are fairly close to the stream channel. 10. Describe the overall project in detail, including the type of equipment to be used: Specific Page 2 of 9 repair activities for the site are provided in the site repair plans which are attached. Repair activities proposed for the site include: installing, vane structures to protect unstable stream banks and grading, and planting, unstable stream banks to provide long,-term stability. This work will require the use of a trackhoe with hydraulic thumb and a dump truck to haul and place boulders. A bulldozer may be needed for some of the g,rading, work. 11. Explain the purpose of the proposed work: This work is being, done as part of the Emergency Watershed Protection program that counties impacted by 2 Hurricanes in the Fall of 2004 are carrying, out. The purpose of the work is to repair damaged stream reaches that are unstable and continuing to cause loses to personal and public property and to public resources by degrading, water quality and other natural resources. 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. To our knowledge permits have not been issued for work at these sites in the past. V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. 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 mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. Page 3 of 9 1. Provide a written description of the proposed impacts: Impacts from this work will be minimized whenever possible. However to accomplish these needed repairs impacts may be realized from temporary increased turbidity, removal of aggraded bed material and temporary loss of herbaceous vegetation. Long-term impacts will be an increase in stream bank stability, stable dimension and profile, and improved vegetative cover. 2. Individually list wetland impacts below: 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, fill, 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://www.fenia.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.) Indicate if wetland is isolated (determination of isolation to be made by USACE only). List the total acreage (estimated) of all existing wetlands on the property: 0 Total area of wetland impact proposed: 0 3. Individually list all intermittent and perennial stream impacts below: Length Stream Impact of Average Width Perennial or Site Number Type of Impact* Impact Stream Name** of Stream Intermittent? (indicate on map) (linear Before Impact (please specify) feet Stream bank 1 stabilization, constructing rock cross 1300' North Toe River 20' - 25' Perennial vanes * 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 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.us[?s.QOV. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.cmn, www.mat) uest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 1300' Page 4 of 9 4. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.) below: Open Water Impact Site Number indicate on ma Type of Impact* Area of Impact acres Name of Waterbod (if applicable) y Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. N/A * List cacti impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging, flooding, drainage, bulkheads, etc. 5. 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. Access to each site will be over the most stable route possible and movement of vehicles over access routes will be minimized. Wherever possible equipment work will be done from the stream bank. Operating equipment within the channel will be done when this is the only way to accomplish needed work. Excavated material will be moved directly to trucks for hauling to disposal sites when it will not be used on site. When excavated material will be used on site it will be handled as few times as possible. Work at each site will be accomplished as quickly as possible and the site will be stabilized with erosion control matting and seeding within 5 days of site completion. Trees will be planted during the next dormant season. Equipment leaking any fluids will not be used and if leaks occur during construction the equipment will be replaced or repaired immediately. Sediment and erosion control measures, including silt fence stoned Page 5 of 9 entrances, protected stock vile areas, diversions and check dams, will be employed to minimize sediment movement off site. 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.nc.us/ncwetlands/sti-maide.htmi. 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 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP). Please note it is the applicant's responsibility to contact the NCWRP at (919) 733-5208 to determine availability and to request written approval of mitigation prior to submittal of a PCN. For additional information regarding the application process for the NCWRP, check the NCWRP website at http://h2o.enr.state.ne.us/wm/index.htm. If use of Page 6 of 9 the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): N/A Amount of buffer mitigation requested (square feet): N/A Amount of Riparian wetland mitigation requested (acres): N/A Amount of Non-riparian wetland mitigation requested (acres): N/A Amount of Coastal wetland mitigation requested (acres): N/A IX. Environmental Documentation (required by DWQ) Does the project involve an expenditure of public (federal/state) funds or the use of public (federal/state) land? Yes ® No ? If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ? No If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ? No ? X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 213 .0259 (Tar-Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify. )? Yes ? No ® If you answered "yes", provide the following information: 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. Page 7 of 9 Zone* Impact (square feet Multiplier Required Mitigation 1 3 2 1.5 Total * Zone 1 extends out 30 feet perpendicular from near bank of channel; Zone 2 extends 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 (required by DWQ) 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. There will be no chance in impervious acreage. Existina nroiect sites are agricultural lands and will remain in this land use. Proposed repair work will not alter runoff of stormwater from each site. The end result of this proposed work will be stream banks that are better able to withstand the erosive forces generated by storm flows. XII. Sewage Disposal (required by DWQ) 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, waste water will not be generated by this proiect XIII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (15A NCAC 2H.0500) or any Buffer Rules? Yes ? No Is this an after-the-fact permit application? Yes ? No XIV. Other Circumstances (Optional): Page 8 of 9 1 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). N/A A`pphft}? gent's Signature Date (Agent's sign is valid only if an authorization letter from the applicant is provided.) Page 9 of 9 Plan Review Checklist EWP-Avery County, North Carolina . DSR NT19 i I J a tit S cLw , the Natural Resource Conservation Service Agent for Avery County, have reviewed the stream repair plans listed below. These plans have been prepared by Buck Engineering PC to accomplish stream repair under the Emergency Watershed Protection Program being administered by Avery County. The following table summarizes my comments on these plans: DSR Approve Disapprove Approve with Modifications /VT 14 tl? Additional comments: 9?7:? , Natural Resource Conservation Service Agent c 's Signature To Whom It May Concern: I, Robert Wiseman, County Manager for Avery County, attest to the fact that Avery County has entered into a contract with Buck Engineering PC, a North Carolina professional corporation. Buck Engineering will be providing engineering services and permitting assistance in support of the Emergency Watershed Protection Program. In this contractual relationship, Buck Engineering will act as the County's agent for the purpose of accomplishing this work. Specifically, employees of Buck Engineering may take those actions necessary to obtain environmental permits from the U. S. Army Corps of Engineers, N. C. Division of Water Quality, and N. C. Division of Land Quality. i Robert Wiiseman, County Manager for Avery County Date: ?- d S- Office: Avery County Courthouse, Newland, NC 28657 Map Inset 9 rn? l t I s / ?l l 5 0 c weryc my LEGEND (Group 6) Site: NT-19 r/r ----- Avery County EWP DSR Spc 14rccla r ' Fl*td Cm.: T(5 (:mn.m) 0 50 100 200 Feet TlmalDab: ? • Dab d aarbl pholoprephy: 1990 DSR No. NT19 Site Assessed By: JR, DT, JW Date Assessed: 5/12/2005 Location: Avery County along Wes Brewer Rd 36.0905441, 81.9162783 Length of Assessment: Approximately 1300 feet Waterbody: _ Debris removal Channel realignment X Bank sloping X In-stream structures X Bank stabilization X Riparian planting North Toe River X Seeding Adjust channel dimension Summary Evaluation of Conditions: This reach of the North Toe has two highly sinuous S-turns that have severely eroded banks. The upstream starts with a straight stretch that has a berm on the right side of the channel. The berm was built after the flooding. Further downstream are two tortuous meander bends that has left the right bank nearly vertical, while the left bank has been partially rebuilt. Coming out of the meanders is a long straight section of riffle that has a couple hundred feet of unstable banks on the right and left banks. The bottom of the reach has two more meander bends that will need attention. The left bank has been blown out and overwidened. NRCS has estimated $5,000 for emergency construction work to protect $85,000 of property. Recommendations for Improvements: Bank stabilization in most areas can be accomplished by applying matting, seed, and live staking, where appropriate. Bank sloping will only be needed in the lower end of the reach. In some cases in-stream structures, such as J-hooks and cross-vanes will be required to stabilize the banks and restore a stable stream dimension. Track hoe should be used for stream structures and bank stabilization. e, n41, /r dl.r l C-e ca?SIrtlc4 Vane j r o L,d f.CK ; : Ape !?u M4 aid I?uPs+Flce aoo- Q co.,5f'uc+ a roCK Cross vok"s i o CU K f I 0 I 4 (U u-J -f Aru 05 G - ke Me,, ider EWP Group 6-NT19 PHOTO LOG Slope, seed, mat, and livestake bank . 49 t .m?w• u ? ' Eroded right bank. ?yyex?t? • "?iGit'?14+."e.]it ?:rii'k"!?t?.,. ?^'.3w-. . wu Bermed left bank. Eroding right bank. Eroding right bank. Stream has been blown out. Stream has been blown out. NT19 Parcel Data Table 1 Tax PIN NAME ADDRESS CITY STATE ZIP LAT LONG TYPE LENGTH 183600951838 VANCE, CHRISTINE A 1299 WES BREWER RD NEWLAND NC 28657-0000 36.094701 81.913778 Seed, mat, livestake, construct 1 rock cross vane 400 ft 183600865526 NUNEZ, KATHERINE 8 VICTOR PETER PO BOX 580 NEWLAND NC 28657-0580 36.096264 81.913778 Construct 2 rock cross vanes 200 ft 183600963340 DUCKWORTH, WILMA SUE 1389 WES BREWER RD NEWLAND NC 28657-0000 36.095822 81.913778 Seed, mat, livestake, construct 2 J-Hooks 400 ft r? 6/28/05 Subject: Cultural Resources Literature Search and Survey Results for Avery County NRCS Planned EWP Undertakings To: Jane Shaw, NRCS District Conservationist Date of Survey: 6/14 - 15/2005 From : Jim Errante USDA-NRCS, CRS SC & NC 1835 Assembly St., Rm 950 Columbia SC 29201 Phone: (803)253-3937 The following list of DSR's were reviewed by Jim Errante, NRCS Cultural Resources Specialist (CRS). A literature search for each planed practice location took place in the Archaeological Map room of the NC Office of State Archaeology. Each location was reviewed for the potential of NRCS planned activities to effect cultural resources (CR's). In addition, photographs of the APE's were reviewed and discussions were held with knowledgeable field office and the engineering staff in order to determine the potential of planned activities to effect CR's at each EWP practice location. Each practice location received a ranking of a low, medium or high potential to effect CR's. All EWP practice locations receiving a medium or high ranking to effect cultural resources were archeologically surveyed by the NRCS CRS. Archaeological survey procedures included reconnaissance survey of all visible soils in the area including river bank profiles, and shovel testing. All shovel tested soils were screened through 1/4 inch hardware mesh. The following Excel file list of EWP locations includes a statement describing the results of this survey work. The NRCS CRS maintains the field work details of the archaeological survey at each APE. Any questions concerning the results of these survey results as listed below should contact the NRCS CRS for further explanation. DSR #s CR Review Comments BC 1 Elk Mills Low potential for impact to CR's FO to survey BC 1 Elk Park Low potential for impact to CR's FO to survey BC 2 Low potential for impact to CR's FO to survey CB 1 Low potential for impact to CR's FO to survey cc 1 No previous recorded CR's. Very low terrace over stream & disturbed soils in APE. Surveyed by CRS. Ok to proceed. CC 2 No previous recorded CR's. Very low terrace over stream & disturbed soils in APE. Surveyed by CRS. Ok to proceed. CC 3 No previous recorded CR's. Very low terrace over stream & disturbed soils in APE. Surveyed by CRS. Ok to proceed. 4 DSR #s CR Review Comments CC 4 Low potential for impact to CR's FO to survey CH 1 Low potential for impact to CR's FO to survey Cross Cr 1 Low potential for impact to CR's FO to survey Cross Cr 2 Low potential for impact to CR's FO to survey Curtis Cr 1 Low potential for impact to CR's FO to survey Dellinger Br 1 Low potential for impact to CR's FO to survey ER 1 Low potential for impact to CR's FO to survey ER 2 Low potential for impact to CR's FO to survey ER 3 No impact to CR's in area. All CR's are outside of APE. All work planned in-stream. Primarily debris removal. Surveyed by CRS. Ok to proceed. ER 5 No previously recorded CR's in area. Very disturbed soils in APE. No CR's. Surveyed by CRS. OK to proceed. ER 6 Low potential for impact to CR's FO to survey ER 7 No previous recorded CR's. Alluvial, silty soils. Surveyed by CRS. Ok to proceed. FC 1 Small Area, OK for FO to Survey FC 2 Low potential for impact to CR's FO to survey GP 1 Low potential for impact to CR's FO to survey HB 1 Low potential for impact to CR's FO to survey HP 1 Low potential for impact to CR's FO to survey K 3 Low potential for impact to CR's FO to survey K 4 Low potential for impact to CR's FO to survey KC 1 Low potential for impact to CR's FO to survey KC 2 Low potential for impact to CR's FO to survey LEC 1 Low potential for impact to CR's FO to survey LHC 1 Low potential for impact to CR's FO to survey LL 1 Low potential for impact to CR's FO to survey LR 1 No previously recorded CR's area. APE is roadside. Soils are disturbed. No CR's. Surveyed by CR Specialist. OK to proceed. LR 2 No previously CR's recorded in APE. This reach is primarily just debris removal or requiring fill. No CR's in APE. Surveyed by CRS. Ok to proceed. LR 3 No previously recorded CR's in APE. Only debris removal scheduled. No CR's in APE. Surveyed by CRS. Ok to proceed. LR 4 Low potential for impact to CR's FO to survey LR 5 Low potential for impact to CR's FO to survey LR 6 Low potential for impact to CR's FO to survey LS 1 Low potential for impact to CR's FO to survey LS 2 Low potential for impact to CR's FO to survey LS 3 Low potential for impact to CR's FO to survey LS 5 Low potential for impact to CR's FO to survey LS 6 Low potential for impact to CR's FO to survey LS 7 Low potential for impact to CR's FO to survey LS 8 Low potential for impact to CR's FO to survey LS 9 Low potential for impact to CR's FO to survey LS 10 Low potential for impact to CR's FO to survey LS 11 Low potential for impact to CR's FO to survey LS 12 Low potential for impact to CR's FO to survey MB 1 Low potential for impact to CR's FO to survey Mrk 123 Low potential for impact to CR's FO to survey MT 1 Low potential for impact to CR's FO to survey MT 2 Low potential for impact to CR's FO to survey MT 3 Low potential for impact to CR's FO to survey MT 4 Low potential for impact to CR's FO to survey NT 1 Low potential for impact to CR's FO to survey NT 2 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. DSR #s CR Review Comments NT 3 Low potential for impact to CR's FO to survey - primarily debris removal. NT 4 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 5 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 6 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 7 Low potential for impact to CR's FO to survey (previously surveyed - No CR's) NT 8 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 9 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 10 No CR's previously recorded in area. Location will primarily involve debris removal. Low banks in area and no evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 11 No previously recorded CR's in area. Impacts planned are adjacent to bridge and are disturbed and heavily scoured. No CR's. Surveyed by CRS. Ok to proceed. NT 12 No previously recorded CR's in area. No CR's. Surveyed by CRS. Ok to proceed. NT 13 No previously recorded CR's in area. Survey focused on streambank stabilization areas. No CR's discovered. Location will primarily involve debris removal. Surveyed by CRS. Ok to proceed. NT 14 No previously recorded CR's in area. Survey focused on streambank stabilization areas. Significant nursery agricultural impacts in area. No CR's discovered. Location will primarily involve debris removal. Surveyed by CRS. Ok to proceed. NT 15 No previously recorded CR's in area. Survey focused on streambank stabilization areas. Significant nursery agricultural impacts in area. No CR's discovered. Location will primarily involve debris removal. Surveyed by CRS. Ok to proceed. NT 16 No CR's previously recorded in area. Location will primarily involve debris removal. No evidence of CR's found. Surveyed by CRS. Ok to proceed. NT 17 Low potential for impact to CR's FO to survey NT 18 No previously recorded CR's in area. Very low terrace, and very scoured area. Area floods frequently. No CR's. Surveyed by CRS. Ok to proceed. NT 19 Low potential for impact to CR's FO to survey PC 1 Low potential for impact to CR's FO to survey PM1 Low potential for impact to CR's FO to survey RB 1 Low potential for impact to CR's FO to survey RC 1 No previously recorded CR's in area. Very disturbed soils in APE - re-routed stream & scoured area. No CR's. Surveyed by CRS. OK to proceed. SB 1 Newland Low potential for impact to CR's FO to survey SB 1 V.Crucis Low potential for impact to CR's FO to survey SC 1 Low potential for impact to CR's FO to survey so 1 Low potential for impact to CR's FO to survey TMC 1 Low potential for impact to CR's FO to survey TMC 2 Low potential for impact to CR's FO to survey TMC 3 Low potential for impact to CR's FO to survey TMC 4 Low potential for impact to CR's FO to survey TMC 5 Low potential for impact to CR's FO to survey UNR 4 Low potential for impact to CR's FO to survey LINT 1 Low potential for impact to CR's FO to survey UNT 2 Low potential for impact to CR's FO to survey LINT 3 Low potential for impact to CR's FO to survey LINT 5 Low potential for impact to CR's FO to survey LINT 6 Low potential for impact to CR's FO to survey UNT 7 Low potential for impact to CR's FO to survey UNT 8 Low potential for impact to CR's FO to survey DSR #s CR Review Comments WC 1 Low potential for impact to CR's FO to survey WF 1 Low potential for impact to CR's FO to survey WF 2 Low potential for impact to CR's FO to survey (previously surveyed - No CR's) WO 1 Low potential for impact to CR's FO to survey WO 2 Low potential for impact to CR's FO to survey WO 3 Low potential for impact to CR's FO to survey WP 1 Low potential for impact to CR's FO to survey WP 2 Low potential for impact to CR's FO to survey BUCK, E N G IN E E R I N G July 12, 2005 Mr. Mark Cantrell US Fish and Wildlife Service 160 Zillicoa Street Asheville, NC 28801 Dear Mr. Cantrell: 8000 Regcnc v 1' arIL %% ay, S Ll lc 200 C a r N o r t h C a r o l i n a 2 7 11 Phone: j l 1) .-163. 5 -i88 Pax: ) I ).-163 5, 490 wwNv.hnekcrtgi n c e r i n? . com Subject: USFWS concerns for EWP DSR sites in Avery County In an USFWS memo, dated June 21, 2005, the USFWS listed a table of EWP DSR sites in Avery County that could potentially impact protected species. Sites NT-13 through 19 and TMC-5 from that list are located upstream of the Appalachian elktoe and therefore may serve as critical habitat for the Appalachian elktoe. However, from a conversation made on June 20, 2005 with Steve Frayley of NC Wildlife Resources Commission, Mr. Frayley stated that the above mentioned sites are too far upstream of existing populations of Appalachian elktoe and therefore would not affect those populations. Mr. Frayley's most recent monitoring data is from 2004. He recommended that additional surveys in the mentioned above sites are not necessary. The USFWS concern for EWP DSR site KC-1 is Gray's lily. It was determined that no work is proposed for this site. Therefore the Gray's lily will not be affected. Debris removal is only work being proposed for EWP DSR LR-4. Debris is woody material (trees and leaf pack) on the riverbanks and should not affect the USFWS concerns for that site. The EWP DSR LS-8 is a residential yard and is not located in or near an area of USFWS concern (swamp-forest bog complex). EWP DSR LL-1 (Squirrel Creek) is the only site from the list that may require an additional survey. Once final designs are made for this site, a biologist from Buck Engineering will perform any necessary surveys to determine if site exists in or near a Southern Appalachian mountain bog and determine potential impacts from proposed work. Table 1 below lists the federally threatened and endangered species for Avery County. No habitat exists for these listed species at the above mentioned sites except for DSR LL- 1 (potential bog turtle habitat) and therefore construction should not impact the listed species. Please contact me at 919-459-9009 for any questions you may have regarding the Avery County EWP DSR sites. /{ } /r ,r rr r i 1+ 1 !i rr i rr . r r i rr a rr J 'i r i .• n r' r /u .r /i r ! l r r' L rr r i +r rr ;u r rr r ?' v_ \ (. (_:' L u r I o t t c N C A E I ': i I I? (- - A t 1 a 11 r :r Ci :\ AMU F, N GIN FF.RINO Table 1. Federally Threatened and Endangered Species in Avery County Common Name Scientific Name Status Vertebrates Bog turtle Clenwiys muhlenbergii T(S/A) Carolina northern flying squirrel Glauconrys sabrinus coloratus Endangered Virginia big-eared bat Corynorhinus townseiidii virginianus Endangered Invertebrates Spruce-fir moss spider Microhexura niontivaga Endangered Vascular Plants Blue Ridge goldenrod Heller's blazing star Roan Mountain bluet Spreading avens Nonvascular Plants Rock Gnome Lichen Sincerely, Gregory W. Price, PWS Solidago spithamaea Threatened Liatris helleri Threatened Houstonia niontana Endangered Geum radiatum Endangered Gymnodernaa lineare Endangered Erosion and Sediment Control Plan Emergency Watershed Protection Program Avery County The following erosion and sediment control measures will be incorporated into all stream repair sites. 1. The Contractor shall minimize vegetation disturbance by only working on the stream bank and channel that is in need of repair. Existing buffers shall not be disturbed unless directed by the designer. 2. The Contractor shall only enter the stream channel as shown on the plans or directed by the designer. These stream accesses shall conform to the design standards shown in the attached detail drawings. Timber mats may be used as a substitute for rock per the approval of the designer. 3. The Contractor shall limit all bank and channel disturbance to activities that can be completed by the end of each working day such that the work would remain in place during an overnight storm event. 4. All equipment and uninstalled materials shall be removed from the channel at the end of each working day and secured safely from potential out-of-bank flow events that may occur prior to performing additional work. 5. Graded stream banks shall be stabilized with temporary and permanent seed and coir fiber matting at the end of each working day. Seeding and coir fiber matting specifications are included with this plan. 6. Stockpiles shall remain at least fifteen feet from flowing water and outside of the top of bank. Silt fence shall be placed at the base of the stockpile between the stockpile and the channel and must function to receive stockpile runoff before entering the channel. Silt fence shall conform to design standards shown in the detail drawings. 7. Temporary vegetation and permanent herbaceous vegetation shall be established on all disturbed areas not already stabilized with matting, within five days after construction is completed. 8. Permanent woody vegetations species are listed in the vegetation specifications; planting details are also included. Buck Engineering 1 of 8 River Works TECHNICAL SPECIFICATION Veeetation Planting General Seeding Seeding should be done immediately upon completion of final grading. Apply seed prior to installing matting. Prepare the soil surface so that it is smooth and free from stones, clods, or debris that will prevent the contact of the matting with the soil. Fertilizer and lime are generally not necessary on most projects, particularly not on sites that have been used for agriculture production or cattle grazing. Urban soils may require amendments. Seed should be broadcast with a centrifugal seeder or by hand, at the full rate along stream banks and in stockpile areas. In all areas where permanent seeding is used in addition to the temporary seed, mixing of the seed for broadcasting is acceptable. Seed and amendments (if needed) should be covered to a depth of 1/2 to 1 inch with soil by using a hand rake, drag or other tillage equipment. Seeding may also be done with a hydroseeder. Wood cellulose fiber will not be acceptable as a substitute for straw mulch. A suitable tracer shall be used to clearly identify areas hydroseeded. A minimum of 500 lbs. per acre of wood cellulose fiber or a non-toxic water base dye may be used as a tracer. Seed shall not remain in water containing fertilizer more than 45 minutes before being used. All products used to hydroseed shall be non-toxic to aquatic organisms. Temporary Seeding For temporary seeding, apply the following vegetation at the listed rates and times. Temporary Seeding (September to March): Rye grain 3 lbs per 1,000 sq ft or 1301bs per acre Temporary Seeding (April to August): Foxtail Millet 1 lb per 1,000 sq ft or 401bs per acre A combination of the two temporary seed types shall be used during the boundary months of March, April, August and September to ensure survival. In all disturbed areas where no permanent seed is being used (i.e. yard or agricultural field) and temporary seed is not desired at the higher rate, broadcast temporary seed at the lower rate of approximately 1/2 the full lbs/acre stocking rate. When used in conjunction with permanent seed mix, apply at 1/2 the full lbs/acre rate. Permanent Seeding Permanent seeding will be accomplished using the mix listed below: Buck Engineering 2 of 8 River Works Riparian Seed List Scientific name Agrostis alba Carex vulpinoidea Elylnus vlrgincus Juncus fisus Panicun: clandestinuni Polygonum pennsylvanicum Bidens frondosa Coreopsis lancolata Cassia fasciculata Verbesina alternifolia Common Name % of Mix Redtop 15% Fox Sedge 10% Virginia Wild Rye 20% Soft Rush 5% Deer Tongue 15% Smamveed 5% Beggers Ticks 5% Lance leafed Coreopsis 15% Partridge Pea 5% Wingstem 5% Seed at full rate of 15 lbs/acre along stream banks and in any stream buffer and wetland areas. Riparian Buffers Trees and Shrubs Trees and shrubs will be used to provide permanent vegetation for EWP repair sites. Species used shall be selected from the following list: Shrub and Small Trees Scientific name Common name Salix serlcea Silky Willow Xanthorhiza siniplicissinia Yellowroot Physocarpus opulifolius Ninebark Cornus anionum Silky Dogwood Hamamelis virginiana Witch-hazel Carpinus caroliniana Ironwood Corylus americana Hazel-nut Ahms serrulata Tag Alder Ostrya virginiana Hombeam Spirea tomentosa Hardhack Rhododendron arborescens Smooth Azalea Rhododendron maximum Rosebay Rhododendron Cephalanthus occidentalis Button Bush Itea virginica Virginia Sweetspire Calycanthus floridus Sweet Shrub Leucothoe axillaris var. editonun Dog Hobble Hydrangea arborescens Mountain Hydrangea Sambucus canadensis Elderberry Buck Engineering 3 of 8 River Works LargeTrees Scientific name Common name Aesculus octandra Buckeye Tsuga canadensis Canadian Hemlock Platanus occidentalis Sycamore Acer rubrum Red Maple Quercus alba White Oak Quercus rubaa Red Oak Liriodendron tulipifera Tulip Poplar Tsuga carolinianum Carolina Hemlock Betula lenta Cherry Birch Trees shall be planted as either bare rooted or containerized material. Trees should be planted at a rate of 400 stems/acre (roughly 10 feet on center) where EWP repairs have been accomplished. Planting of this material will be done during the dormant season (late fall and winter of 2005-2006). Refer to the attached details and specifications for more information. Stream banks Live Staking Species used for live staking shall be taken from the following species: Scientific name Cornus amomum Salix sericea Santbucus canadensis Cephalanthus occidentalis Salix nigra Common name Silky Dogwood Silky Willow Elderberry Buttonbush Black Willow Stake at 2-3 foot spacing on the outside of all meander bends. Stake at 6-7 foot spacing on the inside of meander bends and all tangent sections. Note this is appropriate for most rural systems. Urban or flashy systems should be staked at higher rates. Utilize as diverse a species group as feasible and make sure that black willow constitutes less than 25% of total stakes used. Containerized Plants: Containerized shrub material may also be used on the stream banks to increase the diversity. Applications and spacing should reflect that of live stake material. Mulching Mulching shall be used to provide temporary protection of soil surfaces from erosion. Mulching should be performed within 48 hours of seeding. Grain straw mulch should be applied on seeded areas at a rate of 75 bales per acre. Apply mulch uniformly. Buck Engineering 4 of 8 River Works Erosion Control Matting Ecostakes Provide wooden stake not less than 12 in. (300 mm) in length with a notch cut 1 in. (25 mm) from the top. These stakes shall be used to stake the matting along the slopes. Wooden 3 ft. stakes spaced approximately 4 ft. apart shall be used to secure the matting at the toe of slope. The toe stakes shall have a minimum 1-inch by 1-inch cross-section and shall be designed so that the matting can not slide past the exposed end of the stake. Refer to the attached details and specifications for EWP work for more information. Coir Fiber Matting The erosion control matting shall be a machine-produced mat of 100% coconut fiber with the following properties: Matrix 100% Coconut Fiber Weight 20 oz/SY (678 gm/m2) Tensile Strength 1348 x 626 lb/ft minimum (1650.5 x 766.5 kg/m) Elongation 34% x 38% Open Area (measured) 50% Thickness 0.30 in minimum (7.6 mm) Flexibility (mg -cm) 65030 x 29590 Recommended Flow 11 feet/second (3.35 m/s) Size 6.6 x 164 ft (120 SY) or (100 SM) "C" Factor 0.002 Place the coir fiber matting immediately upon final grading. Provide a smooth soil surface free from stones, clods, or debris that will prevent the contact of the matting with the soil. Apply seed prior to installing matting. Begin at the bottom of the slope by anchoring the matting in a 6-inch (15 cm) deep by 6-inch (15 cm) wide trench. Backfill and compact the trench after staking. Walking backward down the stream, allow the matting to unroll slowly; ideally the matting roll will rest against your shin as you walk. Stake the matting according to recommended stake pattern for specific product and slope. (See stake pattern guide that comes with the product.) Place matting in full contact with the soil. The edges of the parallel matting must be staked with approximately 2 inches (5 cm) of overlap such that the edge of the downstream matting is under the one just upstream. When matting must be spliced down the slope, place matting end over end (shingle style) with approximately 6 inches overlap. Drive stakes through the overlapped area. Place stakes across the matting at ends, junctions and trenches approximately 1.3 ft apart. Place stakes along the outer edges, down the center of each strip of matting and along all lapped edges approximately 2 ft apart. Cut excess matting and anchor at the end of the slope. Buck Engineering 5 of 8 River Works Temporary Stream Access Ramps Stream access ramps shall be constructed using either rock or timber mats in locations as shown on the plans or as directed. Grading shall be performed only to the extent needed to form a stable ramp connecting the stream bank grade to the streambed. The Contractor shall determine the appropriate number of timber mats and ramp angle according to the equipment that will be using the ramp. Stream access ramps are temporary and shall be removed and the areas restored to their original state when they are no longer needed or permanent measures are installed. Sediment Fence Geotextile sediment fences shall be used to trap sediment from areas of limited runoff. Sediment fences shall be properly anchored to prevent erosion under them. These works are temporary and shall be removed and the areas restored to their original state when they are no longer needed or permanent measures are installed. Locations for sediment filters are shown on the plans. Refer to sediment fence specifications (6.62) in the NC Erosion and Sediment Control Planning and Design Manual for material and installation requirements. Gravel Construction Entrance/Exit Temporary gravel construction entrances shall be constructed as shown on the plans and according to specification 6.06 of the NC Erosion and Sediment Control Planning and Design Manual. In-stream Structures In-stream structures include w-weirs, cross vanes, j-hook vanes, log vanes, and wing deflectors. The quantity of in-stream structures to be constructed shall follow approved plans, but may be affected by conditions encountered during construction Boulders used for in-stream structures shall be relatively flat on either side in the same dimension, preferably the long dimension, and must have relatively smooth ends. No more than 5% of the boulders shall be smaller than 3'x2'x2'. Boulders larger than 6'x4'x3' shall be permitted. Boulders found on-site and approved for use by the Developer will be used to the extent feasible. The Contractor shall construct in-stream structures with equipment capable of moving and accurately placing boulders of approximate dimensions 6'x4'x3'. If suitable for backfill, excavated material shall be placed on the upstream side of structures or as directed. Unless otherwise approved by the Developer, excavation to prepare the subgrade for the installation of in-stream structures shall be consecutive and continuous. Once the excavation of a structure has begun, the structure shall be completed by the end of the workday. All equipment shall be removed from the stream at the end of each workday. Any accumulation of sediment in the channel shall be cleaned as needed during construction and at the end of construction. No separate payment will be made for this clean-up work. Buck Engineering 6 of 8 River Works Construction Sequence of Events Construction shall be performed at the EWP site in accordance with the plans and in general accordance with the following sequence: 1. Mobilize equipment and materials to the site. 2. Set up construction access pads, staging areas, haul roads, and silt fences. 3. Install stream access ramps. 4. Excavate and grade banks and construct in-stream structures. 5. Seed and mat graded banks and immediately upon reaching final grades. 6. Stabilize all disturbed soil with temporary and permanent seed prior to leaving the site each day and prior to moving to the next work area. 7. Dispose of excess materials at approved off-site locations. 8. Remove stream access ramps. 9. Remove silt fence and seed and mulch staging areas to restore these areas to pre- project conditions. 10. Demobilize grading equipment from the site. Remove construction access pads. 11. Plant bank, floodplain and buffer woody vegetation and live stakes during the dormant season. Buck Engineering 7 of 8 River Works Details and Specifications for EWP Work Planting • Bare Root/Container Planting • Brush Mattress • Tree & Shrub Planting Details • Live Staking Erosion Control • Erosion Control Matting • Silt Check • Silt Fence • Typical Pump Around Operation • Temporary Gravel Construction Entrance • Ford Stream Crossing • Ford Stream Crossing 2 • Temporary Ford Stream Crossing W/ Flume Pipe Stream Repair Structures • Typical Structure Placement • Typical Plan View & Profile • Constructed Riffle • Double Drop Rock Cross Vane • Double Wing Deflector • "J" Hook Vane • Log Vane • Log Vane 2 • Log Step Pool • Rock Vane • Rock Cross Vane Type 1 • Rock Cross Vane Type 2 • Root Wads • Single Wing Deflector • Step Pool Channel Buck Engineering 8 of 8 River Works J-HOOK VANE W H w 9 Ili BOTTOM 1/3 BOTTOM WIDTH OF i WIDTH OF CHANNEL CHANNEL FLOW LEAVE 1' 2' 20' TO 30' GAPS A A NO GAPS BETWEEN BOULDERS / SCOUR POOL SCOUR POOL (EXCAVATED) ?- PER DIRECTION OF ENGINEER 12 TO 213 BANKFULL HEADER ROCK STREAMBED ELEVATION FLOW ----a- BACKFILL (ON-SITE ALLUVIUM OR NO. 57 STONE)- CLASS A STONE CLASS 1 STO PLAN VIEW NOTES FOR ALL VANE STRUCTURES: 1. BOULDERS MUST BE AT LEAST 4' x Tx T. 2. INSTALL FILTER FABRIC FOR DRAINAGE BEGINNING AT THE MIDDLE OF THE HEADER ROCKS AND EXTEND DOWNWARD TO THE DEPTH OF THE BOTTOM FOOTER ROCK AND THEN UPSTREAM TO A MINIMUM OF TEN FEET. 3. DIG A TRENCH BELOW THE BED FOR FOOTER ROCKS AND PLACE FILL ON UPSTREAM SIDE OF VANE ARM, BETWEEN THE ARM AND STREAMBANK 4. START AT BANK AND PLACE FOOTER ROCKS FIRST AND THEN HEADER (TOP) ROCK. 5. CONTINUE WITH STRUCTURE, FOLLOWING ANGLE AND SLOPE SPECIFICATIONS. 6. AN EXTRA BOULDER CAN BE PLACED IN SCOUR POOL FOR HABITAT IMPROVEMENT. 7. USE CLASS 1 STONE TO FILL GAPS ON UPSTREAM SIDE OF BOULDERS, AND CLASS A STONE TO FILL GAPS ON UPSTREAM SIDE OF CLASS 1 STONE. 8. AFTER ALL STONE HAS BEEN PLACED, FILL IN THE UPSTREAM SIDE OF THE STRUCTURE WITH ON-SITE ALLUVIUM TO THE ELEVATION OF THE TOP OF THE HEADER ROCK PROFILE VIEW 8000 Regency Parkway Suite 200 BUCK4 Cary, North Carolina 27571 Phone: 919463-5488 F' `= < = ` '" 7 r t i ?' = Fax: 919453-5490 CLASS A STONE STREAMBED BACKFILL (ONSRE ALLUVIUM OR N0.57 STONE)` FILTER FABRIC 3 L1-r--. 10' MINIMUM -? SECTION A - A "J" HOOK VANE - FOOTER ROCK SCOUR POOL (EXCAVATED) HEADER ROCK ROCK CLASS 1 STONE ROCK CROSS VANE TYPE 1 FLOW TYPE 1 CROSS VANE FOR GRAVEUCOBBLE BED RIVERS j WITH DRAINAGE AREAS GREATER THAN 12m? 1n Tnolnn nTU FLOW --? _MI 2'N_j TOE OF SECTION A - A 5111 ' . 1 t ? 20' TO 30' I BOULDERS C SILL I •. PLAN VIEW VANE ARM LENGTH INVERT WITH VANE ARM SLOPE VANE ANGLE NOTES FOR ALL VANE STRUCTURES: 1. BOULDERS MUST BE AT LEAST 4'x 3'x2'. 2. INSTALL FILTER FABRIC FOR DRAINAGE BEGINNING AT THE MIDDLE OF THE HEADER ROCKS AND EXTEND DOWNWARD TO THE DEPTH OF THE BOTTOM FOOTER ROCK, AND THEN UPSTREAM TO A MINIMUM OF SIX FEET. 3. DIG A TRENCH BELOW THE BED FOR FOOTER ROCKS AND PLACE FILL ON UPSTREAM SIDE OF VANE ARM, BETWEEN THE ARM AND STREAMBANK 4. CONSTRUCT FOLLOWING ANGLE AND SLOPE SPECIFICATIONS. 5. USE CLASS 1 STONE TO FILL GAPS ON UPSTREAM SIDE OF BOULDERS, AND CLASS A STONE TO FILL GAPS ON UPSTREAM SIDE OF CLASS 1 STONE. 6. AFTER ALL STONE HAS BEEN PLACED, FILL IN THE UPSTREAM SIDE OF THE STRUCTURE WITH ON-SITE ALLUVIUM TO THE ELEVATION OF ONE HALF THE HEADER ROCK 8000 Regency Parkway Suite 200 Cary, North Carolina 27511 BUCK4h Phone: 919-463-5486 Fax: 919-463-5490 FT FT 0 BANKFULL STAGE HEADER ROCK STREAM BANK B B FLOW ? 4X TO 7X VANE ARM SLOPE STREAM BED ELEVATION FOOTER ROCK PROFILE VIEW B - B VANE ARM FILTER FABIC PROFILE VIEW C - C ROCK CROSS VANE TYPE 1 CROSS VANE INVERT/GRADE POINT EROSION CONTROL MATTING PLACE COIR FIBER MATTING IN 61NCH DEEP TRENCH, STAKE, BACKFILL, AND COMPACT /-- TOP OF STREAMBANK TYPICAL MATTING STAKE N T 1. BANKS SHOULD BE SEEDED PRIOR TO PLACEMENT OF MATTING. 2. PLACE COIR FIBER MATTING ACCORDING TO MANUFACTURER RECOMMENDATIONS. 3. MATTING STAKES SHOULD BE PLACED IN A DIAMOND SHAPED PATTERN. THE WOOD STAKE SHALL BE THE NORTH AMERICAN GREEN EGO-STAKE OR APPROVED EQUAL WITH THE FOLLOWING DIMENSIONS: LEG LENGTH 11.00 IN 27.94 CM HEAD WIDTH 11.25 IN 3.18 CM HEAD THICKNESS 0.40 IN 1.02 CM LEG WIDTH 0 60 IN 1.52 CM TAPERED TO POINT) LEG THICKNESS 0.40 IN 1 02 CM TOTAL LENGTH 12.00 IN 3048 CM • ? • • e • • • • • • • off TOP OF -? --- --- --- --? --? -- -- -- ---- O=.C STREAMBANK 0 0 • • o • • • • • 0 1 e • • o • o • • e o • e • o e • • • o o • • o e o e a • e • e e• • • o PLAN VIEW BUCK 8000 Regency Parkway Suite 200 Cary, North Carolina 27511 Q Phone: 919-463-5488 Fax: 9194615490 DITCH TOP OF STREAMBANK STAKES COIR FIBER MATTING TO BE EXTENDED TO TOE OF SLOPE EROSION CONTROL MATTING LIVE STAKING TOP TOP OF STREAMBANK TOP OF STREAMBANK PLANT STAKES FROM TOP OF BANK TO TOE OF BANK IN A DIAMOND SHAPED STAGGERED PATTERN CROSS SECTION VIEW 6'-8' SPACING 139390 r_z- coeriun TOE OF SLOPE SQUARE CUT TOP BUDS FACING UPWARD LIVE CUTTING MIN. 1/2- DIA 2'. 3' LENGTH ANGLE CUT 30-45 DEGREES LIVE STAKE DETAIL PLAN VIEW BUCK ^ 6000 Regency Parkway Suite 200 Cary, North Carolina 27511 Phone: 919-463-5488 Fax: 919-463-5490 NOTES; 1. STAKES SHOULD BE CUT AND INSTALLED ON THE SAME DAY. 2. DO NOT INSTALL STAKES THAT HAVE BEEN SPLIT. 3. STAKES MUST BE INSTALLED WITH BUDS POINTING UPWARDS. 4. STAKES SHOULD BE INSTALLED PERPENDICULAR TO BANK 5. STAKES SHOULD BE 12 TO 2 INCHES IN DIAMETER AND 2 TO 3 FT LONG. 6. STAKES SHOULD BE INSTALLED LEAVING 1/5 OF STAKE ABOVE GROUND. LIVE STAKING PLAN VIEW SILT CHECK FLOW CONSTRUCTION AREA UPSTREAM / STILLING BASIN 1 (2 FT. MAX DEPTH) J STONE CLASS A .TER FABRIC BOULDERS EXISTING CHANNEL PLAN VIEW NOTES: CLEAN OUT STILLING BASIN OF TRAPPED SEDIMENT PRIOR TO REMOVAL Q 8000 Regency . North Parkway Suite 200 Cary. Carolina 27511 Phone: 919463-5488 { r -. r ,- r, t .? - r-r , - Fax: 919-463-5490 FLOW -? -?{ 1 2'1 1?7 I I _ ?1 ?12 BANKFULL . MAXIMUM DEPTH CLASSASTONE FILTER FABRIC CROSS SECTION SILT CHECK TEMPORARY SILT FENCE NOTES: FILTER FABRIC - 1. USE FILTER FABRIC A MINIMUM OF 36" IN WIDTH AND FASTEN ADEQUATELY TO THE WIRE AS DIRECTED COMPACTED FILL BY THE ENGINEER. 2. PROVIDE 5 STEEL POST OF THE SELF-FASTENER ANGLE STEEL TYPE. 8" POST-2'-0"DEPTH EXTENSION OF FABRIC INTO TRENCH A 8000 Regency Parkway Suite 200 BUCK 4' Cary, North Carolina 27511 Phone: 919-463-5488 1 IV ('T !.i 1 '-t '. 1: ' 1+ ! : Fax: 919-463-5490 SILT FENCE 6' MAXIMUM TEMPORARY GRAVEL CONSTRUCTION ENTRANCE PUBLIC ROAD 6" MINIMUM THICKNESS OF WASHED CLASS A STONE NOTES SPECIFICATION NO. 6.06 - CONSTRUCTION ACCESS 'N.C. EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL DECEMBER 1993" Q 8000 Regency Parkway Suite 200 TEMPORARY GRAVEL BUCK Phone: 919463-5488' Cary, North Carolina 2711 CONSTRUCTION ENTRANCE Fax: 919.463-5490