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HomeMy WebLinkAbout20051648 Ver 1_Complete File_20050831O?OF W ATF9pG Michael F. Easley, Governor cl) William G. Ross Jr., Secretary r- North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E. Director Division of WatcrQuality September 8, 2005 DWQ Project # 05-1648 Avery County Robert Wiseman, County Manager Avery County Post Office Box 640 p (? F, IJ l? y Newland, NC 28657 Subject Property: North Toe River EWP (DSR - NT11) SEP 0 M5 De"NRp ?- WATER QUAUTY Approval of 401 Water Quality Certification with Additional ConMiRIA'DSTO ATERBRANCH Dear Mr. Wiseman: You have our approval, in accordance with the attached conditions and those listed below, to place fill within or otherwise impact 1,800 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 August 31, 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 919-733-68931 Internet: http://h2o enr.state.nc.us/ncvvetlands * VA sazur=r An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper Avery County: Page2 of6 September 8, 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 1,800 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: Pabe 3 of 6 September 8, 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 September 8, 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: Pages of6 September 8, 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 consistant 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/ncwetlands. 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 September 8, 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: Steve Glickauf, 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: 05-1648. EWP. NorthToeRive r.Approval Triage Check List Date: 09/01/05 Kevin Barnett, Asheville Regional Office To: 60-day Processing Time: 8/31/05 to 10/29/05 From: Cyndi Karoly Telephone: (919) 733-9721 DWQ #:05-1648 County: Avery 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 1-1 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! Project Name: Avery County EWP DSR NT11 EWP-Avery County, North Carolina DSR No. NT11- North Toe River Catawba River Basin 2 0 0 5 1 0 4 8 Scope of Work This site is on North Toe River along Hwy 19E. 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 %V9% 19@, 3A n05 'TER QUIIO'I`? NCH VEIANas Office Use Only: Form Version March 05 200510-;8 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 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 N 401 Water Quality Certification ? Express 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 Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, 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 check here: ? cc??aW II. Applicant Information AUG 3 1. 2005 1. Owner/Applicant Information Name: Robert Wiseman DENR - WATER QUALITY Mailing Address: County Manager r v t3RANCti County Administrative Offices PO 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: Steve Glickauf Company Affiliation: Buck Engineering Mailing Address: 200 Arizona Avenue, Suite 114 Atlanta, Georgia 30307 Telephone Number: 404-371-4495 Fax Number: 404-653-0186 E-mail Address: sglickauf(a)buckengineering.com Page I of 9 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: DSR NT11 2. T.I.P. Project Number or State Project Number (NCDOT Only): N/A 3. Property Identification Number (Tax PIN): See Table 1. 4. Location County: Avery Nearest Town: Varies Subdivision name (include phase/lot number): N/A Directions to site (include road numbers/names, landmarks, etc.): The downstream boundary of NT11 is where 19E crosses the North Toe River, downstream from the intersection of 19E and Burleson Rd. Site coordinates (For linear projects, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): Table 1 has landowners coordinates. 6. Property size (acres): N/A 7. Name of nearest receiving body of water: NT11 (the North Toe River empties into Lake James which empties into the Catawba River. 8. River Basin: -L'at . F?,-k> (Note - this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http:/ih2o.enr.state.nc.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 included with each site plan. Landuse on these sites is a mixture of residential and algriculture. Page 2 of 9 10. Describe the overall project in detail, including the type of equipment to be used: Specific repair activities for the site are provided in the site repair plans which are attached. Repair activities proposed for the sites include: restoring pattern profile and/or dimension to aggraded streams installing vane structures to protect unstable stream banks, grading bankfull benches in areas where the channel can no longer access its floodplain, grading and planting unstable stream banks to provide long-term stability, and constructing step -pools. This work will require the use of a trackhoe with hydraulic thumb and a dump truck to haul boulders to the site and to remove debris from the site. Bulldozers may also be needed for grading 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. No JD's and/or permits have been requested and/or obtained for this project 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. No future permit requests are anticipated for this project. 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. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed separately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should 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. Page 3 of 9 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. 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 and short-term loss of herbaceous vegetation. Long-term impacts will be an increase in stream bank bridge and building stability, stable dimension and improved vegetative cover. 2. Individually list wetland impacts. Types of 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. Wetland Impact Number (indicate on map) Type of Impact of Wetland Type (e.g., forested, marsh, herbaceous, bog, etc.) Located within 100-year F(yes/n ain es/no Distance to Nearest Stream linear feet Area of Impact (acres) Total Wetland Impact (acres) 0 3. List the total acreage (estimated) of all existing wetlands on the property: 0.00 acres 4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, 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. To calculate acreage, multiply length X width, then divide by 43,560. Stream Average Stream Impact Impact Perennial or Width Before Length Area of Number Type of Impact Intermittent? Impact (linear Impact (indicate on feet) (acres) ma Reestablish channel dimension, install NT 11 vane structures, bench, slope, seed, Perennial 85 feet 1800 1.4 mat, and plant. Totals 1800 1.4 Page 4 of 9 5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredging, floodin , drainage, bulkheads, etc. Open Water Impact Site Number indicate on ma Name of Waterbody (if applicable) Type of Impact Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc. Area of Impact acres Total Open Water Impact (acres) 0 6. List the cumulative impact to all Waters of the U.S. resulting from the project: Stream Impact (acres): 1.4 Wetland Impact (acres): 0 Open Water Impact (acres): 0 Total Impact to Waters of the U.S. (acres) 0 Total Stream Impact (linear feet): 1800 7. Isolated Waters Do any isolated waters exist on the property? ? Yes ® No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. 8. 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.): Current land use in the vicinity of the pond: 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 the site will be over Page 5 of 9 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 fences stoned entrances, protected stock pile areas diversions and check dams will be employed where appropriate 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 January 15, 2002, 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 NCEEP 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/newet]ands/strmgide.litin1. 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. NA Page 6 of 9 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For additional information regarding the application process for the NCEEP, check the NCEEP website at http://h2o.enr.state.ne.us/wrh/index.litm. If use of the NCEEP is proposed, please check the appropriate box on page five 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) 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? Yes ® No ? 2. 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. 1. Will the project impact protected riparian buffers identified within 15A NCAC 213 .0233 (Neuse), 15A NCAC 213 .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC Page 7 of 9 213 .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify. )? Yes ? No 2. If "yes", 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. Impact I I Required Zone* ?__" Multiplier ,,,r;+;-,,,;, , 3 (2 for Catawba) 1.5 Total I I I I * Zone I extends out 30 feet perpendicular from the top of the 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 Donation of Property, Riparian Buffer Restoration , Riparian Buffer Restoration Fund). Please attach all within 15A NCAC 213 .0242 or .0244, or .0260. XI. Stormwater (required by DWQ) Describe impervious acreage (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. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. There will be no change in impervious acreage. Existina nroiect sites will remain in their described land use.Pronosed repair work will not alter runoff of stonnwater from the 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 wastewater will not be generated by this project 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 type of mitigation is proposed (i.e., Enhancement, or Payment into the appropriate information as identified Page 8 of 9 XIV. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality? Yes ? No If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description: XV. 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). N/A 5 ft,t y 1 LUV1, -??iC KAc i 10 Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 9 of 9 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. r Army Corps of Engineers, N. C. Division of Water Quality, and N. C. Division of Land Quality. i Robert Wiseman, , County Manager for Avery County Date: ?`' ?? ' e S- Office: Avery County Courthouse, Newland, NC 28657 Plan Review Cheeldist EWP-Avery County, North Carolina DSR PM1, SC1,_.NTII;.LR1 I (?? J/9-4tt?, 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 PMl -SCI NT 11 x Additional comments: , Natural Resource Conservation Service Agent Agent's Signature A _ ? Map Inset 180400860965 + AVERY FAMILY N $ •°••.••• REVOCABLE TRUST" Waypoint 4 !? pct ! 8 & 9 s^ 180400958826' .. TODD, RITA P. & TODD, J. LIONEL '•o, 7, A. ff- Legend Waypoint 2 rte, ,- ?'`~ :.? r"' Refers to APPROXOMATE locations. a 5 & 6 See design detail for construction guidelines. ` rn Numbers refer to photos. Letters refer to sub reaches. 180400853713 " IRWIN INVESTMENTS, LTD o Numbers refer to the numbered photos Cross vane .•" J-Hook Waypoint 1 Slope, seed, mat, and plant. 4 ., , Mid-channel bar r J` ' 6 ?""" err Avulsion Reshape point bar AP_ S Construct step pool W s ?` `? o I Restore channel dimension rl \ 181400042182 BURLESON, HENRY & $ -' MRSWB a , V Y? E ter- ? 2905 10 ors=? `'ter x '"?'`? ? ? ?s ?s ?? .; •? ? , ON w X4 •.? ? ?, , ,, , ? 1 .. " .tom .0 e 00 X3 X? -ate v, 180400924478 wig way .?'"r'" !k MC NEIL, GAIL V & JOAN° BRINKLEY X1 s N r 3 45 L Jjs. - •s r dl? ? - a = f very Coun LEG 'ND 1 &2 (Group 10) Site:NT-11 BUCK 5 22 ?? -i Avery County EWP G N (. I N G E R I N ?i NT-1 1? /GI 312 DSR Site Parcels NT-12 NT-3 NT-IS NT-13 Topo (5' Contours) Field Crew: Nr-1• °> 0 150 300 600 Streams Feet Time/Date: "°' " Date of aerial photography: 1998 DSR No. NT11 Site Assessed By: WH, SG, AC Date Assessed: 5/16/2005 Location: Avery County along the North Toe River. The downstream boundary is where 19E crosses the North Toe River, downstream from the intersection of 19E and Burleson Rd. 36.03367195° Latitude -82.099775° Longitude Length of Approximately 4800 feet Waterbody: North Toe River Assessment: _ Debris removal X Bank sloping X Bank stabilization _ Channel realignment X_ In-stream structures X Riparian planting X_ Seeding X Adjust channel dimension Summary Evaluation of Conditions: Because of the length of the DSR and the various issues that need to be addressed at this site, NT-11 shall be subdivided into three reaches: A, B, and C as shown by the design aerial. Within reach A there are 3 sub-reaches (identified as waypoints 1, 2, and 4 on the design aerial) with a total of 310 feet erosion creating unstable bank. Reach B was a previous EWP site and has an instability problem due to past flooding. Buck will work with NRCS to assess the problem and will make further recommendations within the coming weeks. At Reach C bank erosion is occurring upstream and downstream from the bridge and also at the mid-channel bar. The mid-channel bar has been deposited because the reach has improper dimension. According to the Economic Evaluation the project will protect 2 homes valued at $200,000 and $100,000 and a U.S. Postal Office valued at $175,000. According to the Damage Survey Report the installation cost of emergency work would be $110,000. The recommendations for improvements listed below would cost approximately $104,040.00. Recommendations for Improvements: Reach A: Work on Reach A shall involve bank stabilization through the use of structures, sloping, seeding, matting, and planting as indicated in the design aerial and design details. At Waypoint 4 two J-Hook vanes shall be constructed on the right bank. The bank shall also be sloped, seeded, matted, and planted. A step pool shall be installed to incorporate the flow from the culvert into the river. At waypoint 2 the right bank shall be sloped, seeded, matted, and planted. The thalweg shall also be reshaped and the mid-channel bar removed. Two J-Hook vanes shall be constructed on the left bank. The point bar on the right bank shall also be reshaped. At waypoint 1 the right bank shall be seeded, sloped, matted, and planted. Disturbed areas shall be seeded, matted, and planted throughout the reach. The total length to be sloped seeded matted and planted is approximately 310 feet. Reach B: Reach B was a previous EWP site and has an instability problem due to past flooding. Buck will work with NRCS to assess the problem and will make further recommendations within the coming weeks. Reach C: Work on Reach C shall involve the construction of two cross vanes: one upstream from the bridge and one downstream from the bridge. These cross vanes will center the thalweg and protect the banks and bridge from erosion. Upstream from the bridge, the mid-channel bar shall also removed, the thalweg reshaped, and proper dimension established. Disturbed areas shall also be seeded, matted, and planted for approximately 560 feet. Planting: A total of 870 feet shall be seeded, matted, and planted throughout NT-11. The banks are approximately 5 feet high. At each planting site, the water surface to the top of the bank shall be planted with live staking (0.22 acres). 270 live stakes should be planted to achieve 6 foot spacing. A 25 foot riparian buffer shall be planted where space is available (0.50 acres). To achieve a planting rate of 680stems/acre, 340 stems will be needed on this riparian zone. The entire 0.72 acres shall be seeded using both temporary and permanent seeding mixes. 10.8 Ibs of each type of seed will be needed to achieve an application rate of 15lbs/acre. 1296 square yards of coconut coir matting shall be required to cover the banks. A species list for planting and permanent seeding is enclosed in the attached erosion and sedimentation control plan. E N G I N E E R I N G CLIENT PROJECT SUBJECT 'N - 11 PAGE OF PROJECT NO. Prepared By Date S-I<o-U Approved By Date i t ? ? i .? J 1 •?t -? ti C '?o ? / c ca _, s b r? T-; < re r, L? a w -i > q f R w ?? in r M- 1-7 lsu(cLj\?-& ENCiINEE R.I.NC.3 CLIENT PROJECT PAGE OF PROJECT NO. SUBJECT . I IA I?IAI riot rJ r H Prepared By LA 4 Date -15'05 Approved By Date I c r K z r r1 L iJ S R t t4 c l OL U Z S G - •p L u r rn ' f TC G C IJ r ro5 ,a ( 1- k u v e O F r R 3 6r ' . ll? $ ' ? cr slo F R ? ?D ?r l? o I? T ?A S u Q r \ e ° t, , c, -? 1 rj 5 p " s C 0. - = N r` A C r e I v 'I o L S L- joo j"! C r $ S 3 ?o ( e r S ? a at r /_7 nA PAGE OF CLIENT PROJECT PROJECT NO. SUBJECT 1`1 T- - f I (= Prepared By V) ,z?, H Date S - E -o5 I I A- \-1 A .- e?o 1 N T, 2 Approved By Date .-, IJ ?? I - i L os o 3 0 _ti? Z_ Lr nr s -3- 1 C? I _ ?? F. N G i r-s T J - 1 F ? T -V, 1 ?.s 14_ C1r - -F? ?? )l.1 \i- ' Q C!- _ "$i 'L. Y_o M C "it VIA r a•' ' Lc- eD U 10? C- = Mo L C hl ?. o v u L I c- 5 A. Po N A er e _ ? (?? is =r OL or OF - " G ftA 6 4- I /o r+ :) Cross-section 1 Max BKF BKF BKF BKF BH TOB Feature Area Width Depth Depth W/D Ratio ER BKF Elev Elev Mid-channel Bar 318.8 194.28 1.64 4.15 118.39 1.8 1.1 100.97 104.4 Cross-section 1 108 106 0 C 104 cc 102 a) .................................. ........ w 100 98 96 100 .150 200 250 300 350 400 Station --o Bankfull ...e..- Floodprone Cross-section 2 Max BKF BKF BKF BH TOB Feature Area BKF Width Depth Depth W/D Ratio ER BKF.Elev Elev Pool 424.4 102.91 4.12 6.35 24.95 1.2 2.7 94.49 96.05 Cross-section 2 102 -----------------------------------------------------------------------------------------------------0 100 98 0 96 a > 94 .................................... w 92 90 88 _ 86 100 150 200 250 300 350 400 Station F • Bankfull ... ?• • . Floodprone Cross-section 3 Max BKF BKF BKF BH TOB Feature Area BKF Width Depth Depth W/D Ratio ER BKF Elev Elev Reference Riffle 369.1 120.93 3.05 4.94 39.62 1.3 2.3 94.79 96.23 Cross-section 3 102 --- - - - -- 100 ...................o 98 96 ?o ......................................... a>, 94 w 92 90 88 100 150 200 250 300 350 400 Station ---0 .. Bankfull ---o... Floodprone Cross-section 4 Max BKF BKF BKF BH TOB Feature Area BKF Width Depth Depth W/D Ratio ER BKF Elev Elev Reference Riffle 347.8 79.98 4.35 5.7 18.39 1.3 3.5 105.78 107.68 Cross-section 4 114 112 ....................................................................... ...........................o 110 0 108 106 ........................... w 104 102 100 98 100 150 200 250 300 350 400 Station F - • Bankfull ...e--- Floodprone Proposed Cross-section at Cross-section 1 BKF Area BKF Width Max BKF Depth W/D 349.9 77.2 4.5 17.0 Proposed Typical Cross-section overlaid on Cross-section 1 107 105 103 c 101 ?a w 99 97 95 100 150 200 250 300 350 400 Station (ft) Photo 1: Site C. Looking downstream and under the 19E bridge. This photo is just downstream from what is displayed on the aerial photograph. k F,`I f S ,prk A f '? 7 F MY.iw . ?, t 1. ¦ { ' r te°3p ?. , . 4 fir, Photo 2: Site C. Erosion on the left bank under the 19E bridge. Place one cross vane upstream and one downstream from the bridge to prevent erosion. See NC-11c design. B U I C K (Group 10) Site:NTll Photographs Avery County EWP 5/16/05 ?l:d Phu cross-sections and natural channel design detail. See Photo 4: Site A. Waypoint 1. Spotty erosion on the right bank. Slope, seed, mat, and plant. (Group 10) Site:NTll Avery County EWP y? i r? lw. Photo 5: Site A. Waypoint 2. Looking upstream at waypoint 2. Reshape thaiwag, remove mid- channel bar, build two J-Hook vanes, reshape point bar. See design detail NT-11A at waypoint 2. k ` 1? rI? P rAft ?? Photo 6: Site A. Waypoint 2. Left bank erosion at waypoint 2. See design detail NT-11A at waypoint 2. B V C K (Group 10) Site:NTll Photographs Avery County EWP 6/os 5/i FWI' 106- r r y ?JXN WIT M ?1 Photo 7: Site A. Waypoint 2. 50 ft of right bank erosion at waypoint 2. Remove the cherry tree. Slope, seed, mat, and plant. See design detail NT-11A waypoint 2. i lwz Photo 8: Site A. Waypoint 4. Right bank erosion at waypoint 4. Build 2 J-Hook vanes incorporating woody debris. Slope, seed, mat, and plant. See 11A waypoint 4 for design details. Also construct step pool to incorporate flow from the culvert into the stream. BUCK (Group 10) Site:NTll Photographs Avery County EWP 5/16/05 I L Photo 9: Site A. Waypoint 4. Culvert See 11A waypoint 4 for design details. mint 4. Build a step pool. BUCK * (Group 10) Site:NT11 Photographs Avery County EWP 5/16/05 ,:? .? is +° ? • '?..+ ? r. -. F f ? I Aim T "n Photo 1: Site C. Looking downstream and under the 19E bridge. This photo is just downstream from what is displayed on the aerial photograph. s Photo 2: Site C. Erosion on the left bank under and one downstream from the bridge to prevent See NC-llc s r wsiww upstream (Group 10) S[te:NTll Avery County EWP TABLE 1 Landowners, Avery County, NC EW P GROUP DSR PARCEL NU61 NAME ADDRESS CITY STATE ZIP Latitude Lon itude IMPACT FT IMPACT TYPE 180400860965 AVERY FAMILY REVOCABLE TRUST PO BOX 101 PLUMTREE NC 28664 36.040284 82.016517 70 structures and sloping 10 NT11 180400853713 IRWIN INVESTMENTS, LTD 19050 SE COUNTY LINE ROAD TEOUESTA FL 33469 36.036630 82.016408 250 sto i and resha a point bar 180400958826 TODD, RITA P. 8 TODD, J. LIONEL SR. PO BOX 441 WNITEVILLE NC 28472 36.036986 -82.011152 175 strucutres 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 '/a 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. 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 Sol 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 LINT 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 LINT 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 Federally Threatened and Endangered Species Review Based upon a memo submitted by Brian Cole of the United States Fish and Wildlife Service (USFWS), dated June 21, 2005, no listed species or their habitats occur on this site. The USFWS concur with the determination that the activities proposed at this site will not affect endangered or threatened species or their habitats. f 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 Vegetation Plantin1l 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 130 lbs per acre Temporary Seeding (April to August): Foxtail Millet 1 lb per 1,000 sq ft or 40 lbs 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 Elymus virginicus Juncus effisus Panicwn clandestinum 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% Smartweed 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 naine Salix sericea Silky Willow Xanthorhiza simplicissinia Yellowroot Physocarpus opulifolius Ninebark Cornus amonum Silky Dogwood Hainainelis virginiana Witch-hazel Carpinus caroliniana Ironwood Corylus americana Hazel-nut Alnus serrulata Tag Alder Ostrya virginiana Hornbeam 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. editorum Dog Hobble Hydrangea arborescens Mountain Hydrangea Sambucus canadensis Elderberry Buck Engineering 3 of 8 River Works Lar&Trees 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 Sambucus 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 Ecostalces Provide wooden stake not less than 12 in. (300 mm) in length with a notch cut 1 in. (25 mrn) 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 Weight Tensile Strength Elongation Open Area (measured) Thickness Flexibility (mg -cm) Recommended Flow Size 100% Coconut Fiber 20 oz/SY (678 gm/m2) 1348 x 626 lb/ft minimum (1650.5 x 766.5 kg/m) 34% x 38% 50% 0.30 in minimum (7.6 mm) 65030 x 29590 11 feet/second (3.35 m/s) 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 S% 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 ofthe 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 PLANTING SPECIFICATIONS NOTES: 1. PLANT BARE ROOT SHRUBS AND TREES TO THE WIDTH OF THE BUFFER AS SHOWN ON THE PLANS. 2. ALLOW FOR 8-10 FEET BETWEEN PLANTINGS, DEPENDING ON SIZE. 3. LOOSEN COMPACTED SOIL TOP OF STREAMBANK 4. PLANT IN HOLES MADE BY A MATTOCK, DIBBLE, PLANTING BAR, OR OTHER APPROVED MEANS. 5. PLANT IN HOLES DEEP AND WIDE ENOUGH TO ALLOW THE ROOTS f TO SPREAD OUT AND DOWN WITHOUTJ-ROOTING. 8. KEEP ROOTS MOIST WHILE DISTRIBUTING OR WAITING TO PLANT BY MEANS OF WET CANVAS, BURLAP, OR STRAW. 7. HEEL-IN PLANTS IN MOIST SOIL OR SAWDUST IF NOT PROMPTLY PLANTED UPON ARRIVAL TO PROJECT SITE NOTES: 1. WHEN PREPARING THE HOLE FOR A POTTED PLANT OR SHRUB DIG THE HOLE 8 -12 INCHES LARGER THAN THE DIAMETER OF THE POTAND THE SAME DEPTH AS THE POT. 2. REMOVE THE PLANT FROM THE POT. LAY THE PLANT ON ITS SIDE IF NECESSARY TO REMOVE THE POT. 3. IF THE PLANT IS ROOTBOUND (ROOTS GROWING IN A SPIRAL AROUND THE ROOT BALL), MAKE VERTICAL CUTS WITH A KNIFE OR SPADE JUST DEEP ENOUGH TO CUT THE NET OF ROOTS. ALSO MAKE A CRISS-CROSS CUT ACROSS THE BOTTOM OF THE BALL 4. PLACE THE PLANT IN THE HOLE TOP OF STREAMBANK 5. FILL HALF OF THE HOLE WITH SOIL (SAME SOIL REMOVED FOR BACKFILL). 8. WATER THE SOIL TO REMOVE AIR POCKETS AND FILL THE REST OF THE HOLE WITH THE REMAINING SOIL 8000 Regency Parkway Suits 200 44S?id;J???`('-^ OefY, North Phone: 919-483-5488 919-57511 BARE ROOT / CONTAINER PLANTING - C7 -1 i _ r " C L? Fax: ort 919--44833-549490 zY Q b 0 0 A 4 20' TO 30' - FOOTER ROCK - BOULDER _/ CLUSTER PLAN VIEW DOUBLE WING DEFLECTOR Y ¢Z G5 0 0 F- BACK FILL WITH WELL GRADED CLASS A & B STONE MIX COARSE A f MATERIAL FROM STREAMBED NO GAPS BETWEEN ROCKS FIRST ROCK TIED INTO STREAMBANK A BANKFULL STAGE A 113 TO 12 BAN KFULL 12 BANKFULL- FLO W STREAMBED ELEVATION -/// ARM'X' PROFILE VIEW NOTE: NO SLOPE FOR ARMS Y $ Z HEADER ROCK FOOTER ROCK n [ 8000 Regency Parkway Suite 200 LQ) F l EJ1 Cary, North Carolina 27511 Phone: 91983-5488 DOUBLE WING DEFLECTOR Q t ` -` Fax: 919-483-5490 1/3 1/3 1/3 BOTTOM BOTTOM BOTTOM CONSTRUCTED RIFFLE ELEVATION POINT A TOP ?I r OF BANK O TOE EROSION CONTROL MATTING J I Dmax 1r2Wbkf B .? B I 0 19 ?Y Z9 C ° 213 - 1 Mkf C CENTER BOULDER 2"-4' BELOWADJACENT BOULDERS $& SECTION B - B LA' PLAN VIEW EROSION CONTROL - MATTING - 18" NOM. THICKNESS WELL GRADED MIX OF CLASS A, B, AND 1 STONE SECTION C - C [7 n 8000 Regency Parkway Suite 200 Cary, North Carolina 27511 A Phone: 919-483-5488 r' 'V C r; _ , ' [v t: `' Fax: 919-483-5490 BANKFULL HEAD OF RIFFLE BURY BOULDERS 2-4' BELOW BED 18'NOM. THICKNESS WELL GRADED h1IX . OF CLASS A, B, AND 1 STONE E t-??.,: RrFpLE ° ?I I ? 5' h11NIMUM-H-?1 FILTER 8 I I FABRIC PROFILE A - A TOE REACH 1 2 VVbkf ft Dmax ft CONSTRUCTED RIFFLE ?Y,1? w,wr,Y,Y.lwaY?,f?,.Era! o,.F,a wwo..u o.ln.,n, GROUNDCOVER PLANTING DETAIL FKB1E.1' GPAM TREE OR SHRUB PLANTING DETAIL oAO? ? SYw V V STAIQNG DETAIL FOR TREES V TO 10' TALL n? Ynm nF.ar.a oral oiar s.E000nsn n m a,awEEn wA11 NEM FLiCYlFNO*N rFihh.cvrw'fn Mr,ofroK .EfFAMNEO M MOwEEA w lY! fnA Me e?wne wyl K .l NDV! FIIOlm MMl sTM,.e-wui eE me?uua eo OF Mf R0016YLw11 .l fa0?1 WU. 1 1 F I Jr YMi9111liFl,1 R? FKYIG'1 oMx 1Y GaFMCT rnvLL .w,rr rm ro ? ofrm a r SHRUB BED PLANTING DE TAIL vGUYING & STMQNG i. ewe+? ron ecE m.a.mfa o• rim cs Sf.IFEA'lIItn wvi eE.vnlio ?i?rnE?as°An..?.u rui-??Awu .E ? KOw I.HFME FFL[T 011 WIETJWO..AAPLM MW1K MvNOVE? 1 Mrfpa swu Y FA Y..rESMRetne vcorwffana?. /w Y+.am h PE ENfJ,EFIITq?UWEY YRYFLM iOVBO? MGPAL p1.WY1FD 4.ErOK AINN PiP11fJ M WL.lld1[ MCR.1M0 MW.O N41 e CCYgli1 GUY SPACING DETAIL t ?Teae.. CVf ?MUOwaM PRUNING CUTS ?owa t O t? o`e't Z?, RANDOM PLANT SPACING DETAIL-PLAN VIEW 11Ji wW.Y1 YwwLM Y.Cfa oaif++? ? T e ?®d,ED N.Kw Fmvw.feau (.a Fwt?.ama4 GUY TYING DETAIL O PhoNa, 818183-64H8?? oo I Q F.?o?3-5480 TREE & SHRUB PLANTING DETAILS TREE OR SHRUB PLANTING DETAIL ..mob on«..o TREE GUYING DETAIL FOR TREES 10' OR TALLER Y?.m.ur....lnaa.r r.wae.*m.r n. o.mewE TYPICAL STRUCTURE PLACEMENT LOG VANE MAT BANKS WITH COIR FIBER MATTING (SEE SPECS) _ MAT BANKS WITH COIR FIBER MATTING ' - - (SEE SPECS) LOG WEIR e, fc% MAT BANKS WITH COIR FIBER MATTING (SEE SPECS) - / O 0 al 0 0 0 a ° °o o? ? ? -. -- MAT BANKS WITH COIR FIBER MATTINO _ (SEE SPECS) - TOP OF BANK STRUCTURE NOTES: 1. GENERALLY LOG WEIRS, ROOT WADS, LOG VANES AND COIR FIBER MATTING WILL BE INSTALLED IN THE LOCATION AND SEQUENCE AS SHOWN. 2. ADDITIONAL STRUCTURES OR CHANGES TO STRUCTURE LOCATIONS MAY BE MADE BY THE DESIGN ENGINEER DURING CONSTRUCTION. ?-m /pa Q BOCO Regency Parkway Suite 200 ILL}1J; f?(i.? Illddd Cary. Nortn Caronna 27 ¢7x 1 11 Phone: 912-483.5188 F . ?, c: ! ' I - Fax 810.4835480 ROOT WADS (NUMBERAND - SIZE TO BE 'i DETERMv NED IN THE FIELD) MAT BANKS WITH COIR FIBER MATTING (SEE SPECS)' - NOTES: 1. COIR FIBER MATTING TO BE INSTALLED ON ALL RESTORED STREANBANKS. 2. IF ROOT WADS DO NOT COVER ENTIRE SLOPE ON OUTSDE OF MEANDER BENDS, COIR FIBER MATTING IS NEEDED. TYPICAL STRUCTURE PLACEMENT STEP POOL FLOW 1 STREAMBED OR HEADER CULVERTINVERT ROCK-\ FOOTER ROCK WELL GRADED MIX OF CLASS A & B STONE - FLOW -------- 9 m 0 PROFILE VIEW BOULDERS FOR OPEN CHANNEL INVERT OF CULVERT FOR PIPES - TOP OF BANK ? COIR FIBER MAT - BANKFULL (112 TO FULL) CROSS SECTION F2 11 rp/? 8000 Regency Parkway Suite 200 Cary, North Carolina827511 Phone: 91983-5488 8 STEP POOL CHANNEL Fax: 919-483-5490 FILTER FABRIC PLAN VIEW TEMPORARY SILT FENCE 6' MAXIMUM _.-....... ........._.. • -•• .. ..._..._.. FILTER FABRIC NOTES; 1. USE FILTER FABRIC A MINIMUM OF 36" IN WIDTH AND FASTEN ADEQUATELY TO THE WIRE AS DIRECTED BY THE ENGINEER. 2. PROVIDE 5' STEEL POST OF THE SELF-FASTENER ANGLE STEEL TYPE FILTER FABRIC COMPACTED FILL EXTENSION OF FABRIC INTO TRENCH 8000 Regency Parkway 200 Cary, North Carolina 27511 Phone: 919-483-5488 r ' ` 1 f I `ti ;? Fax: 919483-5490 STEEL POST - 2'-0' DEPTH SILT FENCE ROOT WADS WITHOUT TRANSPLANTS CROSS SECTION VIEW NTS FLOOD PLAIN COIR FIBER MATTING BERM (0.5'h1AX.HT.)BERM(S) NOT TO EXTEND BEYOND LIMITS OF ROOT WADS. TOP OF BANK ROOT WADS PLAN VIEW NTS ?o OPTIONAL F COVER LOG ANCHOR COVER LOG UNDER FOOTER LOGS OR WITH A BOULDER 10-15 FEET LONG >10" DIAMETER - FOOTER LOG > 12" DIAMETER INSTALLED BELOW STREAMBED (OPTIONAL PER DIRECTION OF ENGINEER) ROOT WAD TRANSPLANTS OR BOULDERS FLOOD PLAIN ROOT WADS WITH TRANSPLANTS CROSS SECTION VIEW NTS TRANSPLANTS BERM (0.5' MA)LHT.) BERMS) NOT TO EXTEND BEYOND LIMITS OF ROOT WADS. TOP OF BANK FOOTER LOG FOR TRENCHING METHOD ONLY NOTES: TRENCHING METHOD: INT IF THE ROO THE BANK O NEEDS TO TBE WARECONSTRUCTEDD CANNOT BE NOCHING METHODR SHTHE OULD +K BE USED. THIS METHOD REQUIRES THAT A TRENCH BE EXCAVATED FOR THE LOG PORTION OF THE ROOT WAD. IN THIS CASE, A FOOTER LOG' SHOULD BE INSTALLED UNDERNEATH THE ROOT WAD IN A TRENCH EXCAVATED D OF PARALLEL HE THE ROOT WAD SHOD D REWELL MAIN BELOW NORMAL BASE FLOW CONDITIONS. NOTES: 8 FEET LONG TRUNK >12" DIAMETER FOOTER LOG > 12" DIAMETER INSTALLED BELOW STREAMBED (OPTIONAL PER DIRECTION OF ENGINEER) DRIVE POINT METHOD: SHARPEN THE END OF THE LOG WITH A CHAINSAW BEFORE 'DRIVING" INTO THE BANK WADS ANGLE, D EFLECTINGSTREAM FLOW MEETS THE ROOT WAD AT A 90,-DEGREE THE WATER AWAY FROM THE BANK A TRANSPLANT OR BOULDER SHOULD BE PLACED ON THE DOWNSTREAM SIDE OF THE WAD A BCK EDDY S FORMED BY THE ROOT WAD. THE BOULDERRSHALL BE IAP ROXIMATELY 4' X 3'X Z. 4 8000 Regency Parkway Suite 20 Cary, North Carolina 27511 SUCK 0 Phone: 91983-5488 ROOT WADS r; ? T.- p S2 -, [C c Fax: 919453-5490 zY Q m 0 w 0 r SILL I FLOW ROCK CROSS VANE TYPE 2 1/3 OF TOP WIDTH TYPE 2 CROSS VANE FOR GRAVEUSAND BED STREAMS OF CHANNEL WITH DRAINAGE ARES LESS THAN 12mi' C B GRADE Y POINT al I k WELL GRADED MC VANE ARM SCOUR POOL SILL NO GAPS VANE ANGLE BETWEEN 20' TO 30° BOULDERS C VANE ARM LENGTH FT PLAN VIEW INVERT WIDTH FT VANE ARM SLOPE % VANE ANGLE ° NOTES FOR ALL VANE STRI ICTI IRFS• 1. BOULDERS MUST BEAT LEAST4- x 3- x Z. 2. INSTALL FILTER ROCKS AND EXTEND RDOWNWARDI 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 STREAM3ANK 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 8. 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 BANKFULL STAGE FI nw - z MIN CHANNEL BED T FILTER FABIC -*- 8' MINIMUM SECTION A - A B? FLOW ---T STREAM BED ELEVATION- FILTER FABIC FOR DRAINAGE (SEE SPECIFICATIONS) - PROFILE VIEW C - C HEADER ROCK , STREAM BANK FOOTER ROCK Q 8000 Regency Pathway Se 200 Cary, North Carotins 2757511 ROCK CROSS VAN E TYPE 2 Phone: 91983-5488 r ; ; c >.t :? }:• c:_ '-46 Fax: 919-483-5490 PROFILE VIEW B - B VANE ARM r- CROSS VANE INVERTIGRADE POINT FLOW 1 113 TOP WIDTH ?C B I "I LL O 0 O LL A ROCK CROSS VANE TYPE 1 TYPE 1 CROSS VANE FOR GRAVEL/COBBLE BED RIVERS WITH DRAINAGE AREAS GREATER THAN 12mi' FLOW -? 7 VANE f' ARM j' i SCOUR POOL f S1U \ SILL NO GAPS B VANEANGLE BETVVEEN I I I 20' TO 30' BOULDERS C PLAN VIEW VANE ARM LENGTH FT INVERT WIDTH FT VANE ARM SLOPE % VANE ANGLE ° NOTES FOR ALL VANE STRUCTURES: 1. BOULDERS MUST BE AT LEAST 4'x Tx 2'. 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 SLY FEET. 3. DIG ATRENCH 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. 8. 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. { j am \. Q 8000 Regency Parkway Suite 200 ?. Cary, North Carolina 27511 [??,.?aJ? Phone: 919-483-5488 P' N= C t *: r. 77 n " t•? G ??? Fax: 919-483-5490 .t TOE OF BAN BANKFULL STAGE FLOW STREAM BED SECTION A - A 4X ID 77. VANE HEADER ROCK STREAM BANK B FOOTER ROCK M-, FILTER FAB PROFILE VIEW B - B VANE ARM PROFILE VIEW C - C ROCK CROSS VANE TYPE 1 WELL GRADED MIX r-- CROSS VANE INVERT/GRADE POINT TYPICAL PUMP AROUND OPERATION PUMP-AROUND PUMP TEMPORARY FLEXIBLE HOSE IMPERVOUS DIKE (SEE PROJECT SPECIAL PROVISIONS) N^"3' 1. EXCAVATION SHALL BE PERFORMED IN ONLY DRY SECTIONS OF CHANNEL Z. IMPERVIOUS DIKES SHOULD BE USED TO ISOLATE WORK AREAS FROM STREAM FLOW. (SEE PROJECT SPECAL PROVISIONS) S THE CONTRACTOR SHALL NOT DISTURB MORE AREA THAN CAN BE STABILE IMPERVIOUS DIKE IN ONE WORKING DAY. 4. THE PUMP-AROUND PUMP SHOULD ADEQUATELY CONVEY 41 CFS (48 GALLONS PER MINUTE). STABILIZED INLET EX DEWATERING PUMP SPECIAL STILLING BASIN (SEE PROJECT SPECIAL PROVISIONS OR STABILIZED OUTLET) SPECIAL STILLING BASIN (SEE PROJECT SPECIAL PROVISIONS) SPECIAL STILLING BASIN EXISTING GROUND FILTER F.B. ?- 15 - 20 FT -1----, - FC -1-1 P ... -110 1. INSTALL SPECIAL STIWNG BASINS AT THE DOWNSTREAM END OF THE DESIGNATED PROJECT WORKING AREA. 2 THE CONTRACTOR WILL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARY FLEXIBLE HOSE THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK SITE TO THE SPECIAL STILUNG BASIN OR STABILIZED OUTLET. 1 INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN PUMPING OPERATIONS FOR STREAM DIVERSION. 4. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE AND PUMPING APPARATUS IF NEEDED TO DEWATER THE ENRUPPED AREA. THE PUMP AND HOSE FOR THIS PURPOSE SMALL BE OF SUFFICIENT SZE TO DEWATER THE WORKAREA. THIS WATER WILL FLOW INTO A SPECIAL STILLING BASIN- S. THE CONTRACTOR WILL PERFORM STREAM RESTORATION NARK IN ACCORDANCE NTH THE PUN AND FOLLOW .'4o THE GENERAL CONSTRUCTION SEQUENCE. 8. THE CONTRACTOR WILL EXCAVATE ANY ACCUMULATED SILT AND DEWATER BEFORE REMOVAL OF THE IMPERVIOUS DIKE REMOVE IMPERVIOUS DIKES, PUMPS, AND TEMPORARY FLEXIBLE HOSE STARTING NTH THE DOWNSTREAM DIKE FIRST. 7. THE CONTRACTOR WILL COMPLETE ALL GRADING AND STABILIZATION IN ONE DAY WITHIN THE PUMPAROUNO AREA BETVE.EN THE IMPERVIOUS DIKES, 8. ONCE THE WORKING AREA IS COMPLETED, REMOVE THE STILLING BASINS AND STABiUZZ DISTURBED AREAS WITH SEED AND MULCH. {r 13000 Regency Parkway Suite 00 Cary, North Phone: 9119 83-548811 x ?I C; I N( F-1 :T: 1 t I ;V G. Q Fax: 919-453-5490 TYPICAL PUMP AROUND OPERATION TYPICAL PLAN VIEW AND PROFILE PLAN VIEW B I POOL MAX DEPTH /--THALWEG POOL HEAD OF RIFFLE HEAD OF POOL--\ I GI- NOTES; A I V? Pi ?Q? 1. THE POINTS SHOWN, e.g. HEAD OF RIFFLE, HEAD OF POOL AND MAX DEPTH OF POOL B ARE THE CONTROL POINTS USED TO CUT THE PROFILE: HOWEVER. THE CONTRACTOR SHOULD CREATE SMOOTH TRANSITIONS BETWEEN CONTROL POINTS AS SHOWN ABOVE 2. USE THE FACET SLOPES IN THE TABLE AS A GUIDE TO ENSURE THAT THE FEATURES A ARE APPROPRIATELY GRADED. 3. THE HEAD OF RIFFLE ELEVATION SHOULD NOT EXCEED THE HEAD OF POOL ELEVATION. 31 gANKFULL 4. THE CHANGE IN WDTH BETWEEN THE RIFFLES AND POOLS SHOULD OCCUR GRADUALLY LIMITS OVER THE ENTIRE LENGTH OF THE BEND. CENTERLINE BANKFULL? PROFILE VIEW STAGE FLOW'S . HEAD OF RIFFLE MAX DEPTH OF POOL D-h1?ax ? 1 RIFFLE) . THALWEG HEAD OF RIFFLE FACET SLOPE RANGE RIFFLE 0019-.0069 RUN .018-.030 POOL .0007-.002 GLIDE .013-.028 n 8000 Cary, Noth Ca lin. Phone: M 83-54881100 n; ;"` r P. {^'}? R, i• C. Fax: 919483-5490 TYPICAL PLAN VIEW PROFILE A FLOW LOG STEP / POOL BANKFULL 11 j / BURY INTO BED/BANK 5 FEET OR GREATER A (TYPICAL) 20'30'?? SOFA ?% McFp 12" DIAMETER jj R(iy OR GREATER EXCAVATE POOL POOL I ?;? WIDTH / \\ PROTECT BANK USING /\ \ I/ SEE DETAIL t )Ij \ \ RIFFLE WIDTH 20'-30• BURY INTO BEDIBANK 5 FE T O E R GREATER \? (TYPICAL) \ I E EXCAVAT , I POOL i POOL WIDTH 11 12" DIAlvIETER j OR GREATER ? ??. / FLOW j PLAN VIEW 8000 Regency Parkway Sulte 200 Cary, North Carolina 2751 27511 Phone: 919183-5488 Fax: 919483-5490 BANKFULI FILTER FABRIC (TYPICAL) SECTION A - A' FLOW -? STRE,4MBED V BELOW MAX POOL DEPTH FOOTER LOG PROFILE VIEW NOTES: 1. LOGS WITHOUT ROOT MASS MAY BE USED IF APPROVED BY PROJECT ENGINEER. LOG STEP / POOL ?- THALWEG A' 112 TO 2!J BANKFULL LIVE STAKING TOP BOTTOM OF CHANNEL TOE OF SLOPE CROSS SECTION VIEW 8'-8' SPACING I37FM 1_ , 111.1111, TOP OF STREAMBANK TOE OF SLO TOP OF STREAMBANK p ' : 0 ' . 0' , • ' . PLANT STAKES FROM TOP OF BANK TO TOE OF BANK IN A DL41IOND SHAPED STAGGERED PATTERN PLAN VIEW SQUARE CUT TOP BUDS FACING UPWARD LIVE CUTTING MIN. 12' DIA 2'- T LENGTH ANGLE CUT 30 - 45 DEGREES LIVE STAKE DETAIL NOTES : PLAN VIEW 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. 8. STAKES SHOULD BE INSTALLED LEAVING 1/5 OF STAKE ABOVE GROUND. 8000 Regency Parkway Suite 200 Cary, North Carolina 27511 LIVE STAKING Phone: : 81883-5488 :" Fax: 919-483-5490 J-HOOK VANE w NJJ J z co x CHANNEL CHANNEL FLOW LEAVE V- 2' GAPS 20' TO 30' 1'A NO GAPS BETWEEN BOULDERS SCOUR / POOL \ SCOUR POOL (EXCAVATED) PER DIRECTION OF ENGINEER 12 TO 213 BANKFULL--? FLOW -tea 4%T010°/ SLOPE STREAMBED ELEVATION w SACKFILL (ON-SITE ALLUVIUM OR NO. 57 STONE) Mm ` CLASS A STONE CLASS 1 STONE PROFILE VIEW CLASS A STONE PLAN VIEW MOTES FOR ALL VANE STRUCTURES- 1. BOULDERS MUST BE AT LEAST 4' x 3' x Z. 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 BANKAND 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 BACKFILL (ON-SITE ALLUVIUM OR NO. 57 STONE) FILTER FABRIC--\ HEADER ROCK - FOOTER ROCK SCOURPOOL (EXCAVATED) HEADER ROCK a? FOOTER ROCK 1-2' CLASS 1 STONE 10' MINIMUM SECTION A - A Parkway Suite K BOOC PRegency ary, North hone 9C 8ina 27511 00 " J HOOK VANE .r rv C t s? r 4 Fax: 919-483-53-5488 490 EROSION CONTROL MATTING PLACE COIR FIBER MATTING IN 6 INCH DEEP TRENCH, STAKE, BACKFILL, AND COMPACT /_ TOP OF STREAM BANK TYPICAL MATTING STAKE NOTES; 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 ECOSTAKE OR APPROVED EQUAL WITH THE FOLLOWING DIMENSIONS: LEG LENGTH 11.00 IN 27.94 CM HEAD WIDTH 1.25 IN 3.18 CM HEAD THICKNESS 0.40 IN 1.02 CM LEG WIDTH 0.60 IN 1.52 CM APERED TO POIN LEG THICKNESS 0.40 IN 1.02 CM TOTAL LENGTH 12.00 IN 30.48 CM DITCH 0 0 e 0 0 0 • 0 0 0 0 0 TOP OF -- - 0 -- - 0 -- - 0 -- - 0 -- - 0 -- - • -- -- • - -- 0 - -- 0 - - 0 0 STREAMBANK 0 - -- 0 - -- 0 - -- 0 - -- 0 - -- 0 - -- 0 -- - 0 -- - 0 -- - 0 -- - 0 - - 0 0 0 0 0 0 0 • 0 0 0 o d o • 0 0 0 o e o e o 0 0 0 o e o o • e o 0 o e o 0 0 0 0 0 0 0 0 0 0 • 0 PLAN VIEW . DITCH TOP OF STREAMBANK -STAKES COIR FIBER MATTING TO BE EXTENDED TO TOE OF SLOPE TM JU 1Z LIZ) EC 80 Ca hone 911 8t3-548811 00 6 Fax: 919483-5490 EROSION CONTROL MATTING